JPH11248021A - Rotary type passage selector valve - Google Patents
Rotary type passage selector valveInfo
- Publication number
- JPH11248021A JPH11248021A JP10321900A JP32190098A JPH11248021A JP H11248021 A JPH11248021 A JP H11248021A JP 10321900 A JP10321900 A JP 10321900A JP 32190098 A JP32190098 A JP 32190098A JP H11248021 A JPH11248021 A JP H11248021A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- valve housing
- pressure side
- valve seat
- port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Landscapes
- Valve Housings (AREA)
- Multiple-Way Valves (AREA)
- Laser Beam Processing (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えば冷凍サイク
ル等において冷媒の流路の切り換えに四方弁や三方弁と
して用いられるロータリ式流路切換弁に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary flow path switching valve used as a four-way valve or a three-way valve for switching a flow path of a refrigerant in a refrigeration cycle or the like.
【０００２】[0002]
【従来の技術】冷凍サイクルにおいて冷媒流路の切り換
え等に用いる各種の切換弁は、いずれも内部を冷媒が通
過することから、弁の内部を密閉状態に保つことは非常
に重要であり、しかも冷媒は、液冷媒にしろ気体冷媒に
しろ、大気圧に比べてある程度高圧状態であることか
ら、圧力に対する耐久性も非常に重要である。2. Description of the Related Art It is very important to keep the inside of a valve in a closed state because various kinds of switching valves used for switching a refrigerant flow path in a refrigeration cycle pass through the inside of the valve. Regardless of whether the refrigerant is a liquid refrigerant or a gas refrigerant, the refrigerant is in a state of a high pressure to some extent as compared with the atmospheric pressure, and therefore, durability against pressure is also very important.
【０００３】そのため、切換弁のハウジングに対して弁
座を取り付ける際には、密閉度においても耐久性におい
ても優れた溶接が用いられる。[0003] Therefore, when a valve seat is attached to a housing of a switching valve, welding excellent in sealing degree and durability is used.
【０００４】[0004]
【発明が解決しようとする課題】ところが、四方弁や三
方弁として用いられ、弁ハウジングの内部で弁体を回転
させることにより、弁座の高圧側ポートに接続された圧
縮機の吐出口と、弁座の低圧側ポートに接続された圧縮
機の吸入口とのいずれか一方を、冷凍負荷の所定部分に
選択的に接続する、所謂、ロータリ式の流路切換弁の場
合は、弁座を弁ハウジングに溶接により単純に溶着しよ
うとすると、溶接で溶かされた弁座部分がその後に冷却
固化される際に収縮し、弁座の弁体が接触する面が歪ん
で平面度が落ち、弁体と弁座との密着度が下がって外部
への冷媒の漏れを生じ、冷媒が排出されるポートの冷媒
圧力の低下を招いてしまう。However, when the valve is used as a four-way valve or a three-way valve and the valve body is rotated inside the valve housing, the discharge port of the compressor connected to the high pressure side port of the valve seat is provided. In the case of a so-called rotary type flow path switching valve, which selectively connects one of the compressor suction port connected to the low pressure side port of the valve seat to a predetermined portion of the refrigeration load, the valve seat is If welding is simply performed on the valve housing by welding, the valve seat portion melted by welding contracts when it is cooled and solidified later, and the surface of the valve seat that comes into contact with the valve body is distorted and the flatness is reduced. The degree of close contact between the body and the valve seat is reduced, causing leakage of the refrigerant to the outside, resulting in a decrease in the refrigerant pressure at the port from which the refrigerant is discharged.
【０００５】また、ロータリ式の流路切換弁において
は、円筒状に形成される弁ハウジングの肉厚が比較的薄
いことから、両者の接合部分を単純に溶接により溶着し
ようとすると、却って弁ハウジングを溶損してしまいか
ねない。Further, in the rotary type flow switching valve, since the thickness of the cylindrical valve housing is relatively thin, if the joint between the two is simply welded by welding, the valve housing is rather closed. May be damaged.
【０００６】しかも、一般的なアーク溶接により弁ハウ
ジングに弁座を溶着すると、溶接の際の酸化現象により
弁ハウジングの内部に気泡が生じ、この気泡の生じた部
分がその後の使用により破損して、弁ハウジングの内部
の冷媒がこの破損箇所から外部に漏出してしまい、冷媒
が排出されるポートの冷媒圧力の低下という事態を引き
起こしかねない。Further, when the valve seat is welded to the valve housing by general arc welding, bubbles are generated inside the valve housing due to an oxidation phenomenon at the time of welding, and the portion where the bubbles are generated is damaged by subsequent use. In addition, the refrigerant inside the valve housing leaks from the damaged portion to the outside, which may cause a situation in which the refrigerant pressure at the port from which the refrigerant is discharged decreases.
【０００７】また、上述したロータリ式の流路切換弁に
おける排出冷媒圧力の低下の問題は、弁ハウジングに対
する弁座の取り付けによる要因だけに限らず、次のよう
な要因によっても生じる。[0007] Further, the problem of the decrease in the pressure of the discharged refrigerant in the rotary type flow path switching valve described above is caused not only by the mounting of the valve seat to the valve housing but also by the following.
【０００８】即ち、弁座を弁ハウジングに嵌め込み装着
するための段差部が外周縁に必要となったり、圧縮機の
吐出口、吸入口や冷凍負荷側に連なる継手パイプを差し
込み固定するための段差部が各ポートに必要となると、
一枚板を切削加工して段差部を形成することが精度上困
難であることから、本出願人が特願平９−１７４９２５
号において提案したように、外径やポート用の孔の内径
に相違がある複数枚のプレス加工板材を重ね合わせ接合
して弁座を構成しなければならない場合が起こり得る。That is, a stepped portion for fitting the valve seat into the valve housing is required on the outer peripheral edge, or a stepped portion for inserting and fixing a joint pipe connected to a discharge port, a suction port and a refrigeration load side of the compressor. Parts are needed for each port,
Since it is difficult to form a stepped portion by cutting a single plate in terms of accuracy, the present applicant has filed Japanese Patent Application No. 9-174925.
As proposed in the above item, there may be a case where a plurality of stamped plate materials having different outer diameters and inner diameters of port holes must be overlapped and joined to form a valve seat.
【０００９】そのような場合に、各プレス加工板材の相
互間に隙間が空いていると、この隙間と、ロータリ式流
路切換弁の完成状態において弁ハウジングと弁座との間
や各ポートと継手パイプとの間に生じる隙間とを介し
て、弁ハウジングの内部と外部とが連通し、これらの隙
間を通って弁ハウジング内の冷媒が外部に漏出してしま
い、冷媒が排出されるポートの冷媒圧力の低下を招いて
しまう。In such a case, if a gap is left between the respective press-worked plate members, the gap and the gap between the valve housing and the valve seat and each port when the rotary type flow passage switching valve is completed. Through the gap formed between the joint pipe and the inside of the valve housing, the inside and outside of the valve housing communicate with each other, and the refrigerant in the valve housing leaks to the outside through these gaps, and the port through which the refrigerant is discharged This causes a decrease in refrigerant pressure.
【００１０】本発明は前記事情に鑑みなされたもので、
本発明の目的は、ロータリ式の流路切換弁における冷媒
が排出されるポートの冷媒圧力の低下を防止することが
できるロータリ式流路切換弁を提供することにある。[0010] The present invention has been made in view of the above circumstances,
An object of the present invention is to provide a rotary flow path switching valve that can prevent a decrease in refrigerant pressure at a port of a rotary flow path switching valve through which refrigerant is discharged.
【００１１】[0011]
【課題を解決するための手段】前記目的を達成するため
請求項１に記載した本発明のロータリ式流路切換弁は、
少なくとも一端が開放された円筒状で薄肉の弁ハウジン
グに収容された弁体を該弁ハウジングの周方向に回転さ
せることで、前記弁ハウジングの一端を閉塞する弁座に
形成された切換ポートの連通先を、該切換ポートとは独
立して前記弁座に各々形成された高圧側ポート及び低圧
側ポートのうち一方と他方との間で切り換えるロータリ
式流路切換弁において、前記弁座が、前記切換ポート、
前記高圧側ポート、及び、前記低圧側ポートが各々形成
された円板状の基板部と、該基板部の周縁から立設され
前記弁ハウジングの内径に対応する内径の円筒状を呈す
る連結部とを有しており、前記弁ハウジングの一端と前
記連結部の先端との接合部分が、不活性ガス雰囲気下で
のレーザ溶接と不活性ガス雰囲気下での非溶極式アーク
溶接とのうちいずれか一方により溶着されていることを
特徴とする。According to a first aspect of the present invention, there is provided a rotary type flow path switching valve according to the present invention.
A valve body accommodated in a thin cylindrical valve housing having at least one open end is rotated in the circumferential direction of the valve housing to communicate with a switching port formed in a valve seat for closing one end of the valve housing. A rotary type flow path switching valve that switches between one and the other of a high pressure side port and a low pressure side port respectively formed on the valve seat independently of the switching port, wherein the valve seat is Switching port,
The high-pressure side port, and a disc-shaped substrate portion on which the low-pressure side port is formed, and a connecting portion that stands upright from a peripheral edge of the substrate portion and has a cylindrical shape having an inner diameter corresponding to the inner diameter of the valve housing. And a joining portion between one end of the valve housing and the tip of the connecting portion is formed by laser welding under an inert gas atmosphere or non-welded arc welding under an inert gas atmosphere. It is characterized by being welded by one or the other.
【００１２】また、請求項２に記載した本発明のロータ
リ式流路切換弁は、請求項１に記載したロータリ式流路
切換弁において、前記連結部が、前記先端と基端との両
端が各々開放されており、前記連結部の内周面に、前記
弁ハウジングの内径に対応する内径の小径部と、前記基
板部の外径に対応する内径で前記小径部の内径より大き
い大径部とにより段差が形成されており、前記基板部が
少なくとも前記弁ハウジングの肉厚より大きい厚みで形
成されているものとした。According to a second aspect of the present invention, there is provided a rotary type flow path switching valve according to the first aspect, wherein the connecting portion has two ends of the distal end and the base end. Each of which is open and has a small-diameter portion having an inner diameter corresponding to the inner diameter of the valve housing, and a large-diameter portion having an inner diameter corresponding to the outer diameter of the substrate portion and larger than the inner diameter of the small-diameter portion, on the inner peripheral surface of the connecting portion. And a step is formed, and the substrate portion is formed to have a thickness larger than at least the thickness of the valve housing.
【００１３】さらに、請求項３に記載した本発明のロー
タリ式流路切換弁は、請求項１に記載したロータリ式流
路切換弁において、前記基板部が、前記切換ポート、前
記高圧側ポート、及び、前記低圧側ポートが各々形成さ
れた円板状の複数の板材を重ね合わせて構成されてお
り、これら複数の板材のうち１つの板材と前記連結部と
が一体に形成されているものとした。[0013] Further, according to a third aspect of the present invention, there is provided the rotary type flow path switching valve according to the first aspect, wherein the substrate portion comprises the switching port, the high pressure side port, And, the low-pressure side port is formed by laminating a plurality of disc-shaped plate members each formed, and one of the plurality of plate members and the connecting portion are integrally formed. did.
【００１４】また、請求項４に記載した本発明のロータ
リ式流路切換弁は、少なくとも一端が開放された円筒状
で薄肉の弁ハウジングに収容された弁体を該弁ハウジン
グの周方向に回転させることで、前記弁ハウジングの一
端を閉塞する弁座に形成された切換ポートの連通先を、
該切換ポートとは独立して前記弁座に各々形成された高
圧側ポート及び低圧側ポートのうち一方と他方との間で
切り換えるロータリ式流路切換弁において、前記弁座
が、前記切換ポート、前記高圧側ポート、及び、前記低
圧側ポートが各々形成された複数の板材を重ね合わせて
構成されており、前記複数の板材のうち１つの板材の周
縁に、前記弁座により前記弁ハウジングの一端を閉塞し
た状態で前記弁ハウジングの一端寄りの内周面部分に当
接する円筒部と、この円筒部に連設され、前記状態で前
記弁ハウジングの一端から該弁ハウジングの外方に突出
する溶着部とが一体に設けられており、前記弁座により
前記弁ハウジングの一端を閉塞した状態で、前記１つの
板材の前記溶着部と前記弁ハウジングの一端との接合部
分が、不活性ガス雰囲気下でのレーザ溶接と不活性ガス
雰囲気下での非溶極式アーク溶接とのうちいずれか一方
により溶着されていることを特徴とする。According to a fourth aspect of the present invention, there is provided a rotary flow path switching valve according to the present invention, wherein a valve body accommodated in a cylindrical thin-walled valve housing having at least one end opened is rotated in a circumferential direction of the valve housing. By doing so, the communication destination of the switching port formed in the valve seat that closes one end of the valve housing,
In a rotary flow path switching valve that switches between one and the other of a high-pressure side port and a low-pressure side port respectively formed in the valve seat independently of the switching port, the valve seat includes the switching port, The high-pressure side port and the low-pressure side port are each formed by stacking a plurality of plate members each formed, and one end of the valve housing is provided on the periphery of one of the plate members by the valve seat. A cylindrical portion that abuts an inner peripheral surface portion near one end of the valve housing in a state where the valve housing is closed, and welding that is connected to the cylindrical portion and that protrudes outward from the valve housing from one end of the valve housing in the state. And a joint portion between the welded portion of the one plate member and one end of the valve housing is formed in an inert gas atmosphere in a state where one end of the valve housing is closed by the valve seat. Characterized in that it is welded by either one of laser welding and a non-consumable electrode arc welding in an inert gas atmosphere under air.
【００１５】さらに、請求項５に記載した本発明のロー
タリ式流路切換弁は、少なくとも一端が開放された円筒
状で薄肉の弁ハウジングに収容された弁体を該弁ハウジ
ングの周方向に回転させることで、前記弁ハウジングの
一端を閉塞する円板状の弁座に形成された切換ポートの
連通先を、該切換ポートとは独立して前記弁座に各々形
成された高圧側ポート及び低圧側ポートのうち一方と他
方との間で切り換えるロータリ式流路切換弁において、
前記弁ハウジングの一端寄りの内周面部分に、該弁ハウ
ジングの内径より大きい内径の嵌合部が形成されてお
り、前記弁座の周縁部が、前記嵌合部の内径に対応する
外径の大径部と、該大径部の外径より小さい外径で前記
弁ハウジングの内部に挿入可能な外径の小径部とにより
段差状に形成されており、前記小径部を前記弁ハウジン
グの内部に挿入させつつ前記弁座を前記嵌合部に嵌合し
た状態で、前記弁ハウジングの前記嵌合部と前記弁座の
前記大径部との接合部分が、不活性ガス雰囲気下でのレ
ーザ溶接と不活性ガス雰囲気下での非溶極式アーク溶接
とのうちいずれか一方により溶着されていることを特徴
とする。Further, according to a fifth aspect of the present invention, there is provided a rotary flow path switching valve according to the present invention, wherein a valve body accommodated in a cylindrical thin-walled valve housing having at least one end opened is rotated in a circumferential direction of the valve housing. By doing so, the communication destination of the switching port formed on the disc-shaped valve seat that closes one end of the valve housing is changed to the high pressure side port and the low pressure port formed on the valve seat independently of the switching port. In a rotary flow path switching valve that switches between one of the side ports and the other,
A fitting portion having an inner diameter larger than the inner diameter of the valve housing is formed in an inner peripheral surface portion near one end of the valve housing, and an outer peripheral portion of the valve seat has an outer diameter corresponding to the inner diameter of the fitting portion. A large-diameter portion, and a small-diameter portion having an outer diameter smaller than the outer diameter of the large-diameter portion and having an outer diameter that can be inserted into the valve housing. In a state where the valve seat is fitted to the fitting portion while being inserted therein, a joint portion between the fitting portion of the valve housing and the large-diameter portion of the valve seat is formed under an inert gas atmosphere. The welding is performed by one of laser welding and non-welded arc welding in an inert gas atmosphere.
【００１６】また、請求項６に記載した本発明のロータ
リ式流路切換弁は、少なくとも一端が開放された円筒状
で薄肉の弁ハウジングに収容された弁体を該弁ハウジン
グの周方向に回転させることで、前記弁ハウジングの一
端を閉塞する円板状の弁座に形成された切換ポートの連
通先を、該切換ポートとは独立して前記弁座に各々形成
された高圧側ポート及び低圧側ポートのうち一方と他方
との間で切り換えるロータリ式流路切換弁において、前
記弁座の周縁部に、前記弁ハウジングの一端が挿入可能
な環状溝が形成されており、前記環状溝に前記弁ハウジ
ングの一端を挿入した状態で、該弁ハウジングの一端寄
りの外周面部分と前記環状溝との接合箇所が、不活性ガ
ス雰囲気下でのレーザ溶接と不活性ガス雰囲気下での非
溶極式アーク溶接とのうちいずれか一方により溶着され
ていることを特徴とする。According to a sixth aspect of the present invention, there is provided a rotary flow passage switching valve according to the present invention, wherein a valve body housed in a cylindrical thin-walled valve housing having at least one end opened is rotated in a circumferential direction of the valve housing. By doing so, the communication destination of the switching port formed on the disc-shaped valve seat that closes one end of the valve housing is changed to the high pressure side port and the low pressure port formed on the valve seat independently of the switching port. In a rotary flow path switching valve that switches between one of the side ports and the other, an annular groove into which one end of the valve housing can be inserted is formed in a peripheral portion of the valve seat, and the annular groove is formed in the annular groove. In a state where one end of the valve housing is inserted, a joining portion between the outer peripheral surface portion near one end of the valve housing and the annular groove is formed by laser welding under an inert gas atmosphere and a non-melting electrode under an inert gas atmosphere. Type arc welding Characterized in that it is welded by either one of.
【００１７】さらに、請求項７に記載した本発明のロー
タリ式流路切換弁は、請求項６に記載したロータリ式流
路切換弁において、前記弁ハウジングの一端寄りの外周
面部分に、該弁ハウジングの一端を前記環状溝に挿入し
た状態で該環状溝の外縁部分と係合可能な段差部が形成
されており、該段差部と前記環状溝の外縁部分との接合
部分が、不活性ガス雰囲気下でのレーザ溶接と不活性ガ
ス雰囲気下での非溶極式アーク溶接とのうちいずれか一
方によりさらに溶着されているものとした。Further, according to a seventh aspect of the present invention, there is provided a rotary type flow path switching valve according to the sixth aspect, wherein the valve housing is provided on an outer peripheral surface portion near one end of the valve housing. A step portion is formed which can be engaged with an outer edge portion of the annular groove in a state where one end of the housing is inserted into the annular groove, and a joint portion between the step portion and the outer edge portion of the annular groove is formed of an inert gas. The welding was further performed by one of laser welding under an atmosphere and non-electrode welding under an inert gas atmosphere.
【００１８】また、請求項８に記載した本発明のロータ
リ式流路切換弁は、請求項７に記載したロータリ式流路
切換弁において、前記弁座が、前記切換ポート、前記高
圧側ポート、及び、前記低圧側ポートが各々形成された
円板状の複数の板材を重ね合わせて構成されており、こ
れら複数の板材のうち一部の板材が、前記弁ハウジング
の内部に挿入可能な外径で形成されており、前記複数の
板材のうち前記一部の板材を除く他の一部の板材の周縁
部に、前記一部の板材の外側に延出する環状のフランジ
部が連設されており、該フランジ部が前記弁ハウジング
の外径に対応する内径で形成されており、前記フランジ
部と前記他の一部の板材の周縁部との間に前記環状溝が
画成されているものとした。The rotary flow path switching valve according to the present invention described in claim 8 is the rotary flow path switching valve according to claim 7, wherein the valve seat includes the switching port, the high pressure side port, And, the low-pressure side port is formed by laminating a plurality of disc-shaped plate members each formed, and some of the plurality of plate members have an outer diameter that can be inserted into the valve housing. In the plurality of plate members, an annular flange portion extending to the outside of the part plate members is continuously provided on a peripheral portion of another part of the plate members excluding the part plate members. The flange portion is formed with an inner diameter corresponding to the outer diameter of the valve housing, and the annular groove is defined between the flange portion and a peripheral portion of the other part of the plate material. And
【００１９】さらに、請求項９に記載した本発明のロー
タリ式流路切換弁は、請求項３、４又は８に記載したロ
ータリ式流路切換弁において、前記複数の板材における
対応する前記各ポートの打ち抜き径が相互に異なり、当
該打ち抜き径の相違により、前記各ポートに継手パイプ
差し込み用の段差が形成されているものとした。Further, the rotary flow path switching valve according to the present invention described in claim 9 is the rotary flow path switching valve according to claim 3, 4, or 8, wherein each of the ports corresponding to the plurality of plates is provided. Are different from each other, and a step for inserting a joint pipe is formed in each of the ports due to the difference in the punching diameter.
【００２０】また、請求項１０に記載した本発明のロー
タリ式流路切換弁は、少なくとも一端が開放された円筒
状で薄肉の弁ハウジングに収容された弁体を該弁ハウジ
ングの周方向に回転させることで、前記弁ハウジングの
一端を閉塞する弁座に形成された切換ポートの連通先
を、該切換ポートとは独立して前記弁座に各々形成され
た高圧側ポート及び低圧側ポートのうち一方と他方との
間で切り換えるロータリ式流路切換弁において、前記弁
座が、前記切換ポート、前記高圧側ポート、及び、前記
低圧側ポートが各々形成された円板状の基板部と、該基
板部の周縁から立設され前記弁ハウジングの前記一端に
連結される円筒状の連結部とを有しており、前記基板部
の外周と前記連結部の内周とがろう付け処理により接合
されていることを特徴とする。According to a tenth aspect of the present invention, there is provided a rotary type flow switching valve according to the present invention, wherein a valve body accommodated in a cylindrical thin valve housing having at least one end opened is rotated in a circumferential direction of the valve housing. By doing so, the communication destination of the switching port formed in the valve seat that closes one end of the valve housing is changed independently of the switching port between the high pressure side port and the low pressure side port formed in the valve seat. In a rotary flow path switching valve that switches between one and the other, the valve seat includes a disc-shaped substrate portion on which the switching port, the high-pressure port, and the low-pressure port are formed. A cylindrical connecting portion that stands upright from a peripheral edge of the substrate portion and is connected to the one end of the valve housing; an outer periphery of the substrate portion and an inner periphery of the connecting portion are joined by a brazing process; Specially To.
【００２１】さらに、請求項１１に記載した本発明のロ
ータリ式流路切換弁は、少なくとも一端が開放された円
筒状で薄肉の弁ハウジングに収容された弁体を該弁ハウ
ジングの周方向に回転させることで、前記弁ハウジング
の一端を閉塞する弁座に形成された切換ポートの連通先
を、該切換ポートとは独立して前記弁座に各々形成され
た高圧側ポート及び低圧側ポートのうち一方と他方との
間で切り換えるロータリ式流路切換弁において、前記弁
座が、前記切換ポート、前記高圧側ポート、及び、前記
低圧側ポートが各々形成された複数の板材を重ね合わせ
て構成されており、前記複数の板材を重ね合わせた状態
で、隣り合う各板材の相互間がろう付け処理により接合
されていることを特徴とする。Further, in the rotary flow path switching valve according to the present invention, the valve body housed in the cylindrical thin-walled valve housing having at least one end opened is rotated in the circumferential direction of the valve housing. By doing so, the communication destination of the switching port formed in the valve seat that closes one end of the valve housing is changed independently of the switching port between the high pressure side port and the low pressure side port formed in the valve seat. In a rotary flow path switching valve that switches between one and the other, the valve seat is configured by stacking a plurality of plate members on which the switching port, the high-pressure port, and the low-pressure port are formed. In a state where the plurality of plate members are overlapped, adjacent plate members are joined to each other by a brazing process.
【００２２】また、請求項１２に記載した本発明のロー
タリ式流路切換弁は、請求項１１に記載した本発明のロ
ータリ式流路切換弁において、前記ろう付け処理が、前
記各板材の相互間に間隙を設けた状況下でなされたもの
とした。A rotary flow path switching valve according to a twelfth aspect of the present invention is the rotary flow path switching valve according to the eleventh aspect of the present invention, wherein the brazing is performed by the mutual connection of the respective plate members. It was done under the condition that a gap was provided between them.
【００２３】さらに、請求項１３に記載した本発明のロ
ータリ式流路切換弁は、請求項１１又は１２に記載した
ロータリ式流路切換弁において、前記弁座が、前記切換
ポート、前記高圧側ポート、及び、前記低圧側ポートが
各々形成された円板状の基板部と、該基板部の周縁から
立設され前記弁ハウジングの前記一端に連結される円筒
状の連結部とを有しており、前記基板部の外周と前記連
結部の内周とがろう付け処理により接合されているもの
とした。According to a thirteenth aspect of the present invention, there is provided a rotary type flow path switching valve according to the eleventh or twelfth aspect, wherein the valve seat comprises the switching port, the high pressure side. A port, and a disc-shaped substrate portion on which the low-pressure side port is formed, and a cylindrical connection portion that stands upright from the periphery of the substrate portion and is connected to the one end of the valve housing. In this case, the outer periphery of the substrate portion and the inner periphery of the connection portion are joined by a brazing process.
【００２４】また、請求項１４に記載した本発明のロー
タリ式流路切換弁は、請求項１１又は１２に記載したロ
ータリ式流路切換弁において、前記複数の板材のうち１
つの板材の周縁に、前記弁座により前記弁ハウジングの
一端を閉塞した状態で前記弁ハウジングの一端寄りの内
周面部分に当接する円筒部と、この円筒部に連設され、
前記状態で前記弁ハウジングの一端から該弁ハウジング
の外方に突出する突出部とが一体に設けられており、前
記状態で前記円筒部の外周と前記弁ハウジングの内周と
の間に生じる間隙に、前記複数の板材の相互間を接合さ
せるろうが充填され、該充填されたろうを用いたろう付
け処理により、前記状態で前記円筒部の外周と前記弁ハ
ウジングの内周とが接合されているものとした。According to a fourteenth aspect of the present invention, there is provided a rotary flow path switching valve according to the eleventh or twelfth aspect, wherein one of the plurality of plate members is provided.
A cylindrical portion that abuts an inner peripheral surface portion near one end of the valve housing in a state where one end of the valve housing is closed by the valve seat, on a peripheral edge of the two plate members;
In the above state, a protrusion protruding from one end of the valve housing to the outside of the valve housing is provided integrally, and in this state, a gap generated between the outer periphery of the cylindrical portion and the inner periphery of the valve housing. A brazing filler metal for joining between the plurality of plate members is filled, and an outer periphery of the cylindrical portion and an inner periphery of the valve housing are joined in the above state by a brazing process using the filled brazing material. And
【００２５】さらに、請求項１５に記載した本発明のロ
ータリ式流路切換弁は、請求項１０、１１、１２、１３
又は１４に記載したロータリ式流路切換弁において、前
記ポートに継手パイプが差し込まれ、該継手パイプの外
周と前記ポートの内周と前記がろう付け処理により接合
されているものとした。Further, the rotary type flow path switching valve according to the present invention described in claim 15 is the same as that in claim 10, 11, 12, and 13.
Alternatively, in the rotary flow path switching valve described in 14, the joint pipe is inserted into the port, and the outer periphery of the joint pipe and the inner periphery of the port are joined by brazing.
【００２６】また、請求項１６に記載した本発明のロー
タリ式流路切換弁は、請求項１０、１１、１２、１３、
１４又は１５に記載したロータリ式流路切換弁におい
て、前記弁座の中心部に貫通孔が形成されていて、該貫
通孔に前記弁体の回転中心をなす軸部材が挿通されてお
り、該軸部材の外周と前記貫通孔の内周とがろう付け処
理により接合されているものとした。The rotary type flow path switching valve according to the present invention described in claim 16 is the same as that in claim 10, 11, 12, 13,
In the rotary flow path switching valve according to 14 or 15, a through hole is formed in a center portion of the valve seat, and a shaft member serving as a rotation center of the valve body is inserted into the through hole. The outer periphery of the shaft member and the inner periphery of the through hole are joined by brazing.
【００２７】さらに、請求項１７に記載した本発明のロ
ータリ式流路切換弁は、請求項１０、１１、１２、１
３、１４、１５又は１６に記載したロータリ式流路切換
弁において、前記ろう付け処理が還元ガス雰囲気下でな
されているものとした。Further, according to the seventeenth aspect of the present invention, there is provided a rotary type flow path switching valve according to the tenth, eleventh, twelfth and tenth aspects.
In the rotary flow path switching valve described in 3, 14, 15, or 16, the brazing treatment is performed in a reducing gas atmosphere.
【００２８】請求項１に記載した本発明のロータリ式流
路切換弁によれば、共に円筒状を呈する弁ハウジングの
一端と弁座の連結部の先端との接合部分を、他の元素と
の反応を起こさず高温が得られるレーザ溶接か非溶極式
アーク溶接により溶着することから、溶接する弁座の連
結部の範囲を小さくしても弁座が弁ハウジングに強固に
取り付けられることになる。According to the rotary flow path switching valve of the present invention described in claim 1, the joint portion between one end of the valve housing, which has a cylindrical shape, and the tip of the connecting portion of the valve seat, is connected to another element. Since welding is performed by laser welding or non-fused arc welding, which produces a high temperature without causing a reaction, the valve seat can be firmly attached to the valve housing even if the range of the connection portion of the valve seat to be welded is reduced. .
【００２９】その上、溶接により溶かされる連結部の範
囲が小さくなることで、その後に溶かされた連結部部分
が冷却固化しても、その際の収縮により弁座が全体的に
歪んで平面度が低下することがなく、その結果、弁体と
の間に漏れを生じるような隙間の空くのが防止されるこ
とになる。In addition, since the range of the connecting portion melted by welding is reduced, even if the subsequently melted connecting portion is cooled and solidified, the contraction at that time causes the entire valve seat to be distorted and the flatness to be reduced. Is not reduced, and as a result, it is possible to prevent a gap from being generated between the valve body and the valve body.
【００３０】しかも、弁ハウジングの一端と弁座の連結
部の先端との接合部分を、他の元素との反応を起こさず
高温が得られるレーザ溶接か非溶極式アーク溶接により
溶着することから、弁座の連結部に接合する弁ハウジン
グ部分が薄肉であったとしても、高い密閉度で弁座が弁
ハウジングに取り付けられることになる。Further, since the joint between one end of the valve housing and the tip of the connection portion of the valve seat is welded by laser welding or non-welded arc welding, which does not cause a reaction with other elements and obtains a high temperature. Even if the valve housing portion joined to the connecting portion of the valve seat is thin, the valve seat is attached to the valve housing with a high degree of sealing.
【００３１】したがって、弁座に対する弁体の密着度や
弁ハウジングに対する弁座の取り付け部分における密閉
度を高く維持して、外部に排出される流体の圧力低下を
確実に防止することが可能となる。Therefore, the degree of close contact of the valve body with the valve seat and the degree of sealing at the mounting portion of the valve seat with respect to the valve housing can be maintained high, so that a pressure drop of the fluid discharged to the outside can be reliably prevented. .
【００３２】また、請求項２に記載した本発明のロータ
リ式流路切換弁によれば、弁座の基板部を連結部に取り
付ける際には、連結部の大径部に基板部を、小径部との
段差に突き当たるまで挿入し嵌合して、基板部を連結部
の大径部の内周面に取り付けることになるが、基板部が
弁ハウジングの肉厚より大きい厚みで形成されているこ
とから、基板部と連結部との取り付けには、薄肉の弁ハ
ウジングを対象とする取り付けのような取付手段の制約
を減らし、多種多様の取付手段を用いることが可能とな
る。Further, according to the rotary flow path switching valve of the present invention, when the substrate portion of the valve seat is attached to the connecting portion, the substrate portion is attached to the large diameter portion of the connecting portion, and the small diameter portion is attached to the connecting portion. The board portion is attached to the inner peripheral surface of the large diameter portion of the connecting portion by inserting and fitting until it hits a step with the portion, and the board portion is formed with a thickness larger than the thickness of the valve housing. Therefore, the attachment of the board portion and the connecting portion can be reduced by restricting the attachment means such as the attachment for the thin valve housing, and various attachment means can be used.
【００３３】さらに、請求項３に記載した本発明のロー
タリ式流路切換弁によれば、基板部の厚みが増せば増す
程、切換、高圧側、及び、低圧側の各ポートの打ち抜き
形成が難しくなるが、薄肉の板材を複数重ねて基板部を
構成すれば、各板材毎に切換、高圧側、及び、低圧側の
各ポートを形成すればよいので、これら各ポートの打ち
抜き形成を容易にすることが可能となる。Further, according to the rotary flow path switching valve of the present invention, as the thickness of the substrate increases, the switching, the punching of the high pressure side, and the punching of the low pressure side ports are performed. Although it becomes difficult, if a plurality of thin plate members are stacked to form a substrate portion, switching can be performed for each plate member, and the high-pressure side and the low-pressure side ports can be formed. It is possible to do.
【００３４】しかも、基板部を構成する複数の板材のう
ち１つの板材を、例えば、残る他の板材よりも大径と
し、プレス深絞り加工により周縁部を立ち上げさせて、
連結部が一体に形成されたものとすることで、連結部と
基板部との取り付けを、基板部を構成する複数の板材の
単なる重ね合わせにより容易に実現することが可能とな
る。In addition, one of the plurality of plate members constituting the substrate portion has a larger diameter than, for example, the remaining plate members, and the peripheral portion is raised by press deep drawing.
Since the connecting portion is formed integrally, attachment of the connecting portion and the substrate portion can be easily realized by simply overlapping a plurality of plate members constituting the substrate portion.
【００３５】また、請求項４に記載した本発明のロータ
リ式流路切換弁によれば、円筒状を呈する弁ハウジング
の一端と、弁座のうち弁ハウジングの一端から弁ハウジ
ングの外方に突出する溶着部との接合部分を、他の元素
との反応を起こさず高温が得られるレーザ溶接か非溶極
式アーク溶接により溶着することから、溶接する弁座の
溶着部の範囲を小さくしても弁座が弁ハウジングに強固
に取り付けられることになる。According to the rotary flow switching valve of the present invention, one end of the cylindrical valve housing and one end of the valve seat protruding outward from the valve housing. Since the joint with the welded part is welded by laser welding or non-welded arc welding, which does not react with other elements and can produce a high temperature, the range of the welded part of the valve seat to be welded is reduced. Also, the valve seat is firmly attached to the valve housing.
【００３６】その上、溶接により溶かされる溶着部の範
囲が小さくなることで、その後に溶かされた溶着部部分
が冷却固化しても、その際の収縮により弁座が全体的に
歪んで平面度が低下することがなく、その結果、弁体と
の間に漏れを生じるような隙間の空くのが防止されるこ
とになる。In addition, since the range of the welded portion melted by welding is reduced, even if the welded portion subsequently melted is solidified by cooling, the shrinkage at that time causes the entire valve seat to be distorted and flatness. Is not reduced, and as a result, it is possible to prevent a gap from being generated between the valve body and the valve body.
【００３７】しかも、弁ハウジングの一端と弁座の溶着
部との接合部分を、他の元素との反応を起こさず高温が
得られるレーザ溶接か非溶極式アーク溶接により溶着す
ることから、弁座の溶着部に接合する弁ハウジング部分
が薄肉であったとしても、高い密閉度で弁座が弁ハウジ
ングに取り付けられることになる。In addition, since the joining portion between one end of the valve housing and the welded portion of the valve seat is welded by laser welding or non-welded arc welding, which can obtain a high temperature without causing a reaction with other elements. Even if the valve housing portion joined to the welded portion of the seat is thin, the valve seat is attached to the valve housing with a high degree of sealing.
【００３８】したがって、弁ハウジングに対する弁座の
取り付け部分における密閉度を高く維持して、外部に排
出される流体の圧力低下を確実に防止することが可能と
なる。Accordingly, it is possible to maintain a high degree of sealing at a portion where the valve seat is attached to the valve housing, and to reliably prevent a pressure drop of the fluid discharged to the outside.
【００３９】さらに、請求項５に記載した本発明のロー
タリ式流路切換弁によれば、円筒状を呈する弁ハウジン
グの一端寄りの内周面部分に形成された嵌合部と、弁座
の周縁部のうち大径部との接合部分を、他の元素との反
応を起こさず高温が得られるレーザ溶接か非溶極式アー
ク溶接により溶着することから、溶接する弁座の周縁部
のうち大径部の範囲を小さくしても弁座が弁ハウジング
に強固に取り付けられることになる。Further, according to the rotary flow path switching valve of the present invention, the fitting portion formed on the inner peripheral surface portion near one end of the cylindrical valve housing, and the valve seat of the valve seat. Since the peripheral part is welded to the large diameter part by laser welding or non-welded arc welding, which does not react with other elements and can produce a high temperature, the peripheral part of the valve seat to be welded Even if the area of the large diameter portion is reduced, the valve seat is firmly attached to the valve housing.
【００４０】その上、溶接により溶かされる大径部の範
囲が小さくなることで、その後に溶かされた大径部部分
が冷却固化しても、その際の収縮により弁座が全体的に
歪んで平面度が低下することがなく、その結果、弁体と
の間に漏れを生じるような隙間の空くのが防止されるこ
とになる。In addition, since the range of the large diameter portion that is melted by welding is reduced, even if the large diameter portion that is subsequently melted is solidified by cooling, the valve seat is entirely distorted due to shrinkage at that time. The flatness is not reduced, and as a result, a gap that causes leakage between the valve body and the valve body is prevented.
【００４１】しかも、弁ハウジングの一端と弁座の周縁
部のうち大径部との接合部分を、他の元素との反応を起
こさず高温が得られるレーザ溶接か非溶極式アーク溶接
により溶着することから、弁ハウジングの一端が薄肉で
あったとしても、高い密閉度で弁座が弁ハウジングに取
り付けられることになる。Further, the joint between one end of the valve housing and the large-diameter portion of the peripheral portion of the valve seat is welded by laser welding or non-welded arc welding in which a high temperature is obtained without causing a reaction with other elements. Accordingly, even if one end of the valve housing is thin, the valve seat is attached to the valve housing with a high degree of sealing.
【００４２】したがって、弁座に対する弁体の密着度や
弁ハウジングに対する弁座の取り付け部分における密閉
度を高く維持して、外部に排出される流体の圧力低下を
確実に防止することが可能となる。Therefore, the degree of close contact of the valve body with the valve seat and the degree of sealing at the mounting portion of the valve seat with respect to the valve housing can be maintained high, and it is possible to reliably prevent the pressure of the fluid discharged to the outside from dropping. .
【００４３】また、請求項６に記載した本発明のロータ
リ式流路切換弁によれば、弁座の周縁部に形成された環
状溝に、円筒状を呈する弁ハウジングの一端を挿入した
状態で、弁ハウジングの一端寄りの外周面部分と環状溝
との接合箇所を、他の元素との反応を起こさず高温が得
られるレーザ溶接か非溶極式アーク溶接により溶着する
ことから、溶接する弁座の環状溝の範囲を小さくしても
弁座が弁ハウジングに強固に取り付けられることにな
る。According to the rotary type flow switching valve of the present invention, the cylindrical valve housing has one end inserted into the annular groove formed in the peripheral portion of the valve seat. A valve to be welded because the joint between the outer peripheral surface portion near one end of the valve housing and the annular groove is welded by laser welding or non-welded arc welding in which a high temperature is obtained without causing a reaction with other elements. Even if the area of the annular groove of the seat is reduced, the valve seat is firmly attached to the valve housing.
【００４４】その上、溶接により溶かされる環状溝の範
囲が小さくなることで、その後に溶かされた環状溝部分
が冷却固化しても、その際の収縮により弁座が全体的に
歪んで平面度が低下し、弁体との間に漏れを生じるよう
な隙間の空くのが防止されることになる。In addition, since the range of the annular groove melted by welding is reduced, even if the subsequently melted annular groove portion is cooled and solidified, the shrinkage at that time causes the entire valve seat to be distorted and the flatness to be reduced. Is reduced, and it is possible to prevent a gap from being generated between the valve body and the valve body.
【００４５】しかも、弁ハウジングの一端寄りの外周面
部分と弁座の環状溝との接合部分を、他の元素との反応
を起こさず高温が得られるレーザ溶接か非溶極式アーク
溶接により溶着することから、弁座の環状溝に接合する
弁ハウジング部分が薄肉であったとしても、高い密閉度
で弁座が弁ハウジングに取り付けられることになる。Further, the joint between the outer peripheral surface near one end of the valve housing and the annular groove of the valve seat is welded by laser welding or non-welded arc welding, which can obtain a high temperature without reacting with other elements. Therefore, even if the valve housing portion joined to the annular groove of the valve seat is thin, the valve seat is attached to the valve housing with a high degree of sealing.
【００４６】したがって、弁座に対する弁体の密着度や
弁ハウジングに対する弁座の取り付け部分における密閉
度を高く維持して、外部に排出される流体の圧力低下を
確実に防止することが可能となる。Therefore, the degree of close contact of the valve body with the valve seat and the degree of sealing at the mounting portion of the valve seat with respect to the valve housing can be maintained high, and it is possible to reliably prevent the pressure of the fluid discharged to the outside from dropping. .
【００４７】しかも、請求項１と、請求項４乃至請求項
６とに各々記載した本発明のロータリ式流路切換弁によ
れば、溶接を不活性ガス雰囲気の下で行うことから、特
に、金属製であるのが一般的な弁ハウジングの内部に、
溶接の際の酸化現象による気泡が生じることがなく、耐
圧性良く弁座を弁ハウジングに取り付けることが可能と
なる。Further, according to the rotary flow path switching valve of the present invention described in claim 1 and claims 4 to 6, since welding is performed in an inert gas atmosphere, particularly, Inside the general valve housing that is made of metal,
No bubbles are generated due to the oxidation phenomenon at the time of welding, and the valve seat can be attached to the valve housing with good pressure resistance.
【００４８】さらに、請求項７に記載した本発明のロー
タリ式流路切換弁によれば、弁ハウジングの一端を弁座
の環状溝に挿入すると、弁ハウジングの一端寄りの外周
面部分が環状溝と接合するだけでなく、弁ハウジングの
一端寄りの外周面部分に形成した段差部が環状溝の外縁
部分と接合するので、不活性ガス雰囲気の下でレーザ溶
接か非溶極式アーク溶接により溶着する領域を広げ、弁
ハウジングに対する弁座の取付をより強固にすることが
可能になると共に、弁ハウジングの段差部が接合する弁
座の環状溝の外縁部分により弁ハウジングの内圧に対抗
して、耐圧性を向上させることが可能となる。Further, according to the rotary type flow path switching valve of the present invention, when one end of the valve housing is inserted into the annular groove of the valve seat, the outer peripheral surface portion near one end of the valve housing becomes the annular groove. In addition to the joining, the step formed on the outer peripheral surface near one end of the valve housing joins with the outer edge of the annular groove, so it is welded by laser welding or non-welded arc welding under an inert gas atmosphere And the mounting of the valve seat to the valve housing can be strengthened, and the outer edge of the annular groove of the valve seat to which the step portion of the valve housing joins opposes the internal pressure of the valve housing. It is possible to improve the pressure resistance.
【００４９】また、請求項８に記載した本発明のロータ
リ式流路切換弁によれば、弁座を構成する複数の板材の
うち一部の板材を、例えば、残る他の一部の板材よりも
大径とし、プレス深絞り加工により周縁部を立ち上げさ
せて、フランジ部が一体に形成されたものとすること
で、環状溝が周縁部に形成された弁座を複数の板材の単
なる重ね合わせにより容易に得ることが可能となる。According to the rotary flow path switching valve of the present invention, a part of the plurality of plate members constituting the valve seat is replaced with, for example, the remaining other plate members. Also, the peripheral edge is raised by deep drawing and the flange is formed integrally, so that the valve seat with the annular groove formed on the peripheral edge can be simply overlapped with multiple plate materials. It is possible to easily obtain by matching.
【００５０】さらに、請求項９に記載した本発明のロー
タリ式流路切換弁によれば、切換、高圧側、及び、低圧
側の各ポートに対する継手パイプの差し込み寸法を規定
するための段差を、例えば、互いに径の異なる同心円上
の孔を弁座の両面から弁座よりも小さい厚みで各々形成
して相互に連通させるよりも、簡単に且つ高精度に形成
することが可能となる。Further, according to the rotary type flow path switching valve of the present invention, a step for defining the insertion dimension of the joint pipe with respect to each of the switching, the high pressure side, and the low pressure side port is provided. For example, it is possible to form the holes in concentric circles having different diameters from each other with a smaller thickness than the valve seat from both sides of the valve seat and to communicate with each other more easily and with higher precision.
【００５１】また、請求項１０に記載した本発明のロー
タリ式流路切換弁によれば、弁座を構成する基板部の外
周と連結部の内周との間における隙間の発生がろう付け
接合により防止されることになり、しかも、ろう付けに
よることから基板部及び連結部自身はいずれも溶融され
ないことから、接合後の冷却固化による収縮に伴う特に
基板部の歪の発生でその平面度が損なわれることもな
い。Further, according to the rotary type flow switching valve of the present invention, a gap is formed between the outer periphery of the base plate constituting the valve seat and the inner periphery of the connecting portion by brazing. In addition, since neither the substrate part nor the connection part itself is melted due to brazing, the flatness of the substrate part is particularly caused by the distortion of the substrate part due to shrinkage due to cooling and solidification after joining. There is no loss.
【００５２】したがって、弁座に対する弁体の密着度を
高く維持すると共に、ロータリ式流路切換弁の完成状態
において基板部の外周と連結部の内周との間に生じる隙
間を介して、弁ハウジングの内部と外部とが連通して、
弁ハウジングの内部から流体が漏出してしまうのを防
ぎ、基板部と連結部との間における密閉度を高く維持し
て、外部に排出される流体の圧力低下を確実に防止する
ことが可能となる。Therefore, the degree of close contact of the valve body with the valve seat is maintained high, and the valve is formed through the gap formed between the outer periphery of the substrate and the inner periphery of the connecting portion in the completed state of the rotary type flow switching valve. The inside and outside of the housing communicate with each other,
It is possible to prevent fluid from leaking from the inside of the valve housing, maintain a high degree of sealing between the substrate and the connecting portion, and reliably prevent a pressure drop of the fluid discharged to the outside. Become.
【００５３】さらに、請求項１１に記載した本発明のロ
ータリ式流路切換弁によれば、弁座を構成する複数の板
材の相互間における隙間の発生がろう付け接合により防
止されることになり、その結果、ロータリ式流路切換弁
の完成状態において弁ハウジングと弁座との間に生じる
隙間や各ポートを介して、弁ハウジングの内部と外部と
が連通してしまうのを防ぎ、各板材の相互間における密
閉度を高く維持して、外部に排出される流体の圧力低下
を確実に防止することが可能となる。Further, according to the rotary flow path switching valve of the present invention, the generation of a gap between the plurality of plate members constituting the valve seat is prevented by brazing. As a result, the inside and outside of the valve housing are prevented from communicating with each other through a gap or each port generated between the valve housing and the valve seat in a completed state of the rotary flow path switching valve, and each plate material is prevented. It is possible to maintain a high degree of sealing between each other, and to reliably prevent a pressure drop of the fluid discharged to the outside.
【００５４】また、請求項１２に記載した本発明のロー
タリ式流路切換弁によれば、各板材の相互間に設けた間
隙によりその間隙に充填されるろうに毛細管現象を働か
せて、各板材の接合面の全体にろうを広く行き亘らせ、
これにより、各板材どうしのろう付け接合を確実なもの
とすることが可能となる。Further, according to the rotary type flow path switching valve of the present invention, the gaps provided between the respective plate members cause the capillarity to act to fill the gaps, thereby joining the respective plate members. The wax was spread over the whole surface,
Thereby, it is possible to secure the brazing of the respective plate members.
【００５５】さらに、請求項１３に記載した本発明のロ
ータリ式流路切換弁によれば、弁座を構成する円板状の
基板部の外周と円筒状の連結部の内周との間における隙
間の発生が、ろう付け接合により防止されることにな
り、その結果、ロータリ式流路切換弁の完成状態におい
て弁ハウジングの内部と外部とが連通して、弁ハウジン
グの内部から流体が漏出してしまうのを、弁ハウジング
と弁座との間において防いで、外部に排出される流体の
圧力低下をより一層確実に防止することが可能となる。Further, according to the rotary type flow path switching valve of the present invention, the space between the outer periphery of the disk-shaped substrate portion constituting the valve seat and the inner periphery of the cylindrical connecting portion is provided. The formation of a gap is prevented by brazing, and as a result, in the completed state of the rotary flow path switching valve, the inside and the outside of the valve housing communicate with each other, and the fluid leaks from the inside of the valve housing. This can be prevented between the valve housing and the valve seat, and the pressure drop of the fluid discharged to the outside can be more reliably prevented.
【００５６】また、請求項１４に記載した本発明のロー
タリ式流路切換弁によれば、弁座により弁ハウジングの
一端を閉塞した状態で、弁座を構成する複数の板材のう
ち１つの板材の周縁に連設される円筒部と、この円筒部
が当接する弁ハウジングの一端寄りの内周面部分との間
に生じる間隙に充填されたろうにより、円筒部の外周と
弁ハウジングの内周とがろう付け接合されることにな
る。According to the rotary type flow switching valve of the present invention, one end of a plurality of plate members constituting the valve seat is provided with one end of the valve housing closed by the valve seat. The gap formed between the cylindrical portion continuously provided on the peripheral edge of the valve housing and the inner peripheral surface portion near one end of the valve housing with which the cylindrical portion comes into contact is filled with a gap between the outer periphery of the cylindrical portion and the inner periphery of the valve housing. Will be joined by brazing.
【００５７】したがって、ロータリ式流路切換弁の完成
状態において弁ハウジングの内部と外部とが連通して、
弁ハウジングの内部から流体が漏出してしまうのを、１
つの板材の円筒部の外周と弁ハウジングの内周との間に
おいて防いで、外部に排出される流体の圧力低下をより
一層確実に防止することが可能となる。Therefore, in the completed state of the rotary type flow switching valve, the inside and the outside of the valve housing communicate with each other,
Leakage of fluid from inside the valve housing
By preventing between the outer periphery of the cylindrical portion of the two plate members and the inner periphery of the valve housing, it is possible to more reliably prevent the pressure drop of the fluid discharged to the outside.
【００５８】さらに、請求項１５に記載した本発明のロ
ータリ式流路切換弁によれば、弁座のポートの内周と、
このポートに差し込まれる継手パイプの外周とがろう付
け接合されることから、ロータリ式流路切換弁の完成状
態において弁ハウジングの内部と外部とが連通して、弁
ハウジングの内部から流体が漏出してしまうのを、弁座
を貫通するポートの内周と継手パイプの外周との間にお
いて防いで、外部に排出される流体の圧力低下をより一
層確実に防止することが可能となる。Further, according to the rotary type flow path switching valve of the present invention described in claim 15, the inner circumference of the port of the valve seat,
Since the outer periphery of the joint pipe inserted into this port is brazed and joined, the inside and outside of the valve housing communicate with each other in the completed state of the rotary flow path switching valve, and the fluid leaks from the inside of the valve housing. This can be prevented from occurring between the inner periphery of the port passing through the valve seat and the outer periphery of the joint pipe, so that the pressure drop of the fluid discharged to the outside can be more reliably prevented.
【００５９】また、請求項１６に記載した本発明のロー
タリ式流路切換弁によれば、弁座の中心部に形成された
貫通孔の内周と、この貫通孔に挿通されて弁体の回転中
心をなす軸部材の外周とがろう付け接合されることか
ら、ロータリ式流路切換弁の完成状態において弁ハウジ
ングの内部と外部とが連通して、弁ハウジングの内部か
ら流体が漏出してしまうのを、弁座を貫通する貫通孔の
内周と軸部材の外周との間において防いで、外部に排出
される流体の圧力低下をより一層確実に防止することが
可能となる。Further, according to the rotary type flow path switching valve of the present invention, the inner periphery of the through hole formed in the center of the valve seat and the valve body inserted through the through hole to form the valve body. Since the outer periphery of the shaft member forming the center of rotation is brazed and joined, the inside and outside of the valve housing communicate with each other in the completed state of the rotary flow path switching valve, and the fluid leaks from the inside of the valve housing. This can be prevented from occurring between the inner periphery of the through hole passing through the valve seat and the outer periphery of the shaft member, so that the pressure drop of the fluid discharged to the outside can be more reliably prevented.
【００６０】さらに、請求項１７に記載した本発明のロ
ータリ式流路切換弁によれば、ろう付け処理を還元ガス
雰囲気下で行うことにより、ろう付け後の弁座が酸化膜
で被覆されるのを防ぎ、これに伴い、以後のろう付けの
前にその都度酸洗い等による弁座からの酸化膜の除去作
業が必要となるのを防止することが可能となる。Further, according to the rotary type flow path switching valve of the present invention, by performing the brazing process in a reducing gas atmosphere, the valve seat after brazing is covered with the oxide film. Accordingly, it is possible to prevent the necessity of removing the oxide film from the valve seat by pickling or the like before each subsequent brazing.
【００６１】[0061]
【発明の実施の形態】以下、本発明の実施形態について
図面を参照して説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００６２】まず、本発明の実施形態の説明に先立っ
て、本発明が適用されるロータリ式四方弁の一般的な概
略構成を、図１乃至図４を参照して説明する。First, prior to the description of an embodiment of the present invention, a general schematic configuration of a rotary type four-way valve to which the present invention is applied will be described with reference to FIGS.
【００６３】図１はロータリ式四方弁の一般的な概略構
成を示す断面図であり、図１中引用符号１で示すロータ
リ式四方弁は、例えばステンレス等の深絞り加工により
一端が開放された円筒状に形成された弁ハウジング３の
内部に、略円柱状の主弁体５を回転及び回転軸方向動可
能に収容して、弁ハウジング３の開放端を弁座７により
閉塞すると共に、弁ハウジング３の閉塞端側から内部に
プランジャ９を、主弁体５の回転軸方向に往復移動可能
に挿入し、さらに、弁ハウジング３の閉塞端側に電磁ソ
レノイド１１を取着して、電磁ソレノイド１１の通電に
よりその通電方向に応じた極性に帯磁する磁極部材１３
を、弁ハウジング３の１８０゜位相をずらした外周面箇
所に各々配置して形成されている。FIG. 1 is a sectional view showing a general schematic configuration of a rotary type four-way valve. One end of the rotary type four-way valve indicated by reference numeral 1 in FIG. 1 is opened by deep drawing of stainless steel or the like. A substantially cylindrical main valve element 5 is rotatably and axially movably accommodated in a cylindrical valve housing 3, and the open end of the valve housing 3 is closed by a valve seat 7. A plunger 9 is inserted into the housing 3 from the closed end side so as to be able to reciprocate in the direction of the rotation axis of the main valve body 5, and an electromagnetic solenoid 11 is attached to the closed end side of the valve housing 3. A magnetic pole member 13 magnetized to a polarity corresponding to the direction of energization by the energization of 11
Are arranged on the outer peripheral surface of the valve housing 3 at 180 ° out of phase.
【００６４】前記弁座７には、図２に底面図で示すよう
に、その中央に回転軸孔７ａが形成されており、この回
転軸孔７ａを囲むようにして、弁座７の多少周縁寄りの
部分に、高圧側及び低圧側の両ポート７ｂ，７ｃと、第
１及び第２の両切換ポート７ｄ，７ｅとが各々独立して
形成されている。As shown in the bottom view of FIG. 2, the valve seat 7 has a rotary shaft hole 7a formed in the center thereof. Portions 7b and 7c of the high pressure side and the low pressure side, and both first and second switching ports 7d and 7e are formed independently of each other.
【００６５】前記各ポート７ｂ〜７ｅには、継手パイプ
２１〜２７が各々取着されていて、図３に冷媒回路の説
明図で示すように、高圧側ポート７ｂの継手パイプ２１
は圧縮機Ｐの吐出側に、低圧側ポート７ｃの継手パイプ
２３は圧縮機Ｐの吸入側に、第１切換ポート７ｄの継手
パイプ２５は室内熱交換器Ｅに、第２切換ポート７ｅの
継手パイプ２７は室外熱交換器Ｃに各々連通している。A coupling pipe 21 to 27 is attached to each of the ports 7b to 7e. As shown in FIG.
Is the discharge side of the compressor P, the joint pipe 23 of the low pressure side port 7c is on the suction side of the compressor P, the joint pipe 25 of the first switch port 7d is the indoor heat exchanger E, and the joint of the second switch port 7e. The pipes 27 communicate with the outdoor heat exchanger C, respectively.
【００６６】前記主弁体５の弁座７側の端面には、高圧
側と低圧側との２つの連絡溝５ａ，５ｂが各々独立して
形成されていて、主弁体５の第１の回転位置において
は、高圧側連絡溝５ａにより高圧側ポート７ｂと第２切
換ポート７ｅとが連通接続されると共に、低圧側連絡溝
５ｂにより低圧側ポート７ｃと第１切換ポート７ｄとが
連通接続されて、冷媒がコンプレッサＰ→ロータリ式四
方弁１→室外熱交換器Ｃ→絞りＤ→室内熱交換器Ｅ→ロ
ータリ式四方弁１→コンプレッサＰと流れる冷房モード
時の循環経路が形成される。On the end face of the main valve element 5 on the valve seat 7 side, two communication grooves 5a and 5b for the high pressure side and the low pressure side are formed independently of each other. In the rotational position, the high-pressure side communication groove 5a connects the high-pressure side port 7b to the second switching port 7e, and the low-pressure side communication groove 5b connects the low-pressure side port 7c and the first switching port 7d. Thus, a circulation path is formed in the cooling mode in which the refrigerant flows from the compressor P → the rotary four-way valve 1 → the outdoor heat exchanger C → the throttle D → the indoor heat exchanger E → the rotary four-way valve 1 → the compressor P.
【００６７】一方、主弁体５の第２の回転位置において
は、図４に冷媒回路の説明図で示すように、高圧側連絡
溝５ａにより高圧側ポート７ｂと第１切換ポート７ｄと
が連通接続されると共に、低圧側連絡溝５ｂにより低圧
側ポート７ｃと第２切換ポート７ｅとが連通接続され
て、冷媒がコンプレッサＰ→ロータリ式四方弁１→室内
熱交換器Ｅ→絞りＤ→室外熱交換器Ｃ→ロータリ式四方
弁１→コンプレッサＰと流れる暖房モード時の循環経路
が形成される。On the other hand, at the second rotational position of the main valve body 5, as shown in FIG. 4, the high pressure side communication groove 5a connects the high pressure side port 7b to the first switching port 7d. At the same time, the low pressure side communication groove 5b connects the low pressure side port 7c and the second switching port 7e so as to communicate with each other, and the refrigerant flows from the compressor P → the rotary four-way valve 1 → the indoor heat exchanger E → the throttle D → the outdoor heat. A circulation path is formed in the heating mode in which the air flows through the exchanger C → the rotary four-way valve 1 → the compressor P.
【００６８】また、主弁体５の電磁ソレノイド１１側の
端部には、図１に示すように、その中央に回転軸方向に
沿って延在しその後低圧側連絡溝５ｂに連通するパイロ
ット通路５ｃが形成されており、電磁ソレノイド１１寄
りの主弁体５部分には、主弁体５の周方向においてＮ極
とＳ極とが交互に配置された多極マグネット５ｄが設け
られていて、弁ハウジング３の内部に収容された状態
で、弁ハウジング３の内周と主弁体５の外周との間に
は、若干の隙間による通路１５が画成される。As shown in FIG. 1, a pilot passage extending in the center of the main valve element 5 on the side of the electromagnetic solenoid 11 and extending in the direction of the rotation axis and thereafter communicating with the low pressure side communication groove 5b. 5c is formed, and a multi-pole magnet 5d in which N poles and S poles are alternately arranged in the circumferential direction of the main valve body 5 is provided in a portion of the main valve body 5 near the electromagnetic solenoid 11; A passage 15 is formed between the inner periphery of the valve housing 3 and the outer periphery of the main valve body 5 with a slight gap in a state of being housed inside the valve housing 3.
【００６９】このように形成されたロータリ式四方弁１
は、継手パイプ２１から高圧側ポート７ｂを経て高圧側
連絡溝５ａに流入する圧縮機Ｐの吐出口からの高圧冷媒
が、主弁体５と弁座７との間に設けられた不図示の間隙
を通って通路１５に導かれ、この通路１５を通って、弁
ハウジング３の主弁体５よりも電磁ソレノイド１１側の
空間３ａに導入され、この空間３ａの高圧冷媒の圧力に
より、主弁体５が弁座７側に付勢されるように構成され
ている。The rotary type four-way valve 1 thus formed
A high-pressure refrigerant from a discharge port of the compressor P, which flows into the high-pressure side communication groove 5a from the joint pipe 21 through the high-pressure side port 7b, is provided between the main valve body 5 and the valve seat 7 (not shown). The air is guided to the passage 15 through the gap, and is introduced into the space 3a closer to the electromagnetic solenoid 11 than the main valve element 5 of the valve housing 3 through the passage 15, and the pressure of the high-pressure refrigerant in the space 3a causes the main valve to move. The body 5 is configured to be biased toward the valve seat 7.
【００７０】また、ロータリ式四方弁１は、電磁ソレノ
イド１１に対する通電とその停止とによりプランジャ９
を往復移動させることで、プランジャ９の先端のニード
ル弁９ａが主弁体５のパイロット通路５ｃを開閉し、パ
イロット通路５ｃが開放されると、空間３ａに導入され
た高圧冷媒が、パイロット通路５ｃ、低圧側連絡溝５
ｂ、低圧側ポート７ｃ、及び、継手パイプ２３を経て、
圧縮機Ｐの吸入口に流出し、高圧側連絡溝５ａの冷媒圧
力よりも空間３ａの冷媒圧力の方が低くなって、主弁体
５に電磁ソレノイド１１側への浮力が生じるように構成
されている。Further, the rotary type four-way valve 1 controls the plunger 9 by energizing and stopping the electromagnetic solenoid 11.
Is reciprocated, the needle valve 9a at the tip of the plunger 9 opens and closes the pilot passage 5c of the main valve body 5, and when the pilot passage 5c is opened, the high-pressure refrigerant introduced into the space 3a is removed by the pilot passage 5c. , Low pressure side connection groove 5
b, through the low pressure side port 7c and the joint pipe 23,
The refrigerant flows out to the suction port of the compressor P, and the refrigerant pressure in the space 3a is lower than the refrigerant pressure in the high-pressure side communication groove 5a, so that buoyancy is generated in the main valve body 5 toward the electromagnetic solenoid 11. ing.
【００７１】さらに、ロータリ式四方弁１は、電磁ソレ
ノイド１１に対する通電により磁極部材１３がその通電
方向に応じた極性に帯磁して、主弁体５の多極マグネッ
ト５ｂと磁極部材１３との磁気作用により、上述した第
１の回転位置と第２の回転位置との間で回転するように
構成されている。Further, in the rotary type four-way valve 1, when the electromagnetic solenoid 11 is energized, the magnetic pole member 13 is magnetized to a polarity corresponding to the direction of the energization, and the multipole magnet 5 b of the main valve body 5 and the magnetic pole member 13 are magnetized. By operation, it is configured to rotate between the above-described first rotational position and second rotational position.
【００７２】つまり、以上のことを総合すると、ロータ
リ式四方弁１は、電磁ソレノイド１１に対する通電に伴
うパイロット通路５ｃの開放によって、弁座７から離間
するように浮上しつつ主弁体５が第１の回転位置と第２
の回転位置とのうち一方から他方に回転し、その後に電
磁ソレノイド１１に対する通電を停止することに伴うパ
イロット通路５ｃの閉成によって、空間３ａの高圧冷媒
の圧力により主弁体５が弁座７側に付勢され、その時点
の回転位置、つまり、第１の回転位置と第２の回転位置
とのうちどちらか一方の回転位置のまま主弁体５が弁座
７に圧接されるという、一連の弁切換動作を行うように
構成されている。In other words, taking the above into consideration, the rotary four-way valve 1 is configured such that the main valve element 5 floats away from the valve seat 7 by opening the pilot passage 5 c upon energization of the electromagnetic solenoid 11 so that the main valve element 5 Rotational position of 1 and 2nd
The main valve body 5 is rotated by the pressure of the high-pressure refrigerant in the space 3a by closing the pilot passage 5c due to the rotation of the rotation position from one to the other, and then stopping the energization of the electromagnetic solenoid 11. And the main valve body 5 is pressed against the valve seat 7 at the current rotational position, that is, at one of the first rotational position and the second rotational position. It is configured to perform a series of valve switching operations.
【００７３】尚、図１中引用符号１７は、弁座７の回転
軸孔７ａに嵌入されて先端が主弁体５の軸孔５ｅに挿入
される回転軸を示す。Reference numeral 17 in FIG. 1 denotes a rotary shaft that is fitted into the rotary shaft hole 7a of the valve seat 7 and whose tip is inserted into the shaft hole 5e of the main valve body 5.
【００７４】次に、上述したような概略構成を一般的に
有するロータリ式四方弁に適用可能な本発明の実施形態
について、図５乃至図１６を参照して説明する。Next, an embodiment of the present invention applicable to a rotary type four-way valve generally having the above-described general configuration will be described with reference to FIGS.
【００７５】まず、図５を参照して本発明の第１実施形
態によるロータリ式四方弁を説明する。図５は本発明の
第１実施形態によるロータリ式四方弁の要部を断面で示
す説明図であり、図５中引用符号３１は弁ハウジング、
３３は弁座、３５は主弁体（弁体に相当）を各々示す。First, a rotary type four-way valve according to a first embodiment of the present invention will be described with reference to FIG. FIG. 5 is an explanatory view showing a cross section of a main part of the rotary type four-way valve according to the first embodiment of the present invention. In FIG.
Reference numeral 33 denotes a valve seat, and 35 denotes a main valve body (corresponding to a valve body).
【００７６】そして、第１実施形態のロータリ式四方弁
における弁座３３は、弁ハウジング３１の厚みよりも十
分に大きい厚みの円板状を呈する基板部３３ａと、弁ハ
ウジング３１の厚みと同様の厚みの円筒状を呈する連結
部３３ｇとを有している。The valve seat 33 in the rotary type four-way valve of the first embodiment has a disk-shaped substrate portion 33 a having a thickness sufficiently larger than the thickness of the valve housing 31, and the same thickness as that of the valve housing 31. And a connecting portion 33g having a cylindrical shape with a thickness.
【００７７】前記基板部３３ａは弁ハウジング３１の内
径よりも若干大きい外径で形成されており、この基板部
３３ａには、その両端面間を貫通して、回転軸３７が嵌
入される回転軸孔３３ｂと、第１及び第２の２つの切換
ポート（図示せず）と、圧縮機の吐出側が接続される高
圧側ポート３３ｃと、圧縮機の吸入側が接続される低圧
側ポート３３ｄとが各々形成されている。The base 33a is formed with an outer diameter slightly larger than the inner diameter of the valve housing 31. The base 33a has a rotating shaft through which the rotating shaft 37 is fitted. A hole 33b, first and second switching ports (not shown), a high pressure side port 33c to which the discharge side of the compressor is connected, and a low pressure side port 33d to which the suction side of the compressor is connected, respectively. Is formed.
【００７８】このうち、回転軸孔３３ｂは、弁座３３を
弁ハウジング３１に取り付けた状態で弁ハウジング３１
の外方に露出する基板部３３ａの一方の端面３３ｅ寄り
部分が、回転軸孔３３ｂに嵌入される回転軸３７の外径
に対応する内径の小径部３３ｂ1 とされ、基板部３３ａ
の他方の端面３３ｆ寄り部分が、回転軸３７の外径より
大きい内径の大径部３３ｂ2 とされている。Of these, the rotary shaft hole 33b is formed in the valve housing 31 with the valve seat 33 attached to the valve housing 31.
One end surface 33e closer portion of the substrate portion 33a exposed to the outside of, the small diameter portion 33b 1 of the inner diameter corresponding to the outer diameter of the rotary shaft 37 is fitted into the rotation shaft hole 33b, the substrate portion 33a
The other end face 33f closer portion has been a large diameter portion 33b 2 of the larger inner diameter than the outer diameter of the rotary shaft 37.
【００７９】また、高圧側ポート３３ｃは、基板部３３
ａの一方の端面３３ｅ寄り部分が、高圧側ポート３３ｃ
に連結される継手パイプ３９の外径に対応する内径の小
径部３３ｃ1 とされ、基板部３３ａの他方の端面３３ｆ
寄り部分が、継手パイプ３９の外径より大きい内径の大
径部３３ｃ2 とされている。The high pressure side port 33 c is
a portion near one end face 33e is a high pressure side port 33c.
Corresponding to the outer diameter of the joint pipe 39 connected to the small diameter portion 33c 1 of the inner diameter, the other end face 33f of the base plate portion 33a
Deviation moiety is a large diameter portion 33c 2 of the larger inner diameter than the outer diameter of the joint pipes 39.
【００８０】さらに、低圧側ポート３３ｄは、基板部３
３ａの一方の端面３３ｅ寄り部分が、低圧側ポート３３
ｄに連結される継手パイプ４１の外径に対応する内径の
大径部３３ｄ1 とされ、基板部３３ａの他方の端面３３
ｆ寄り部分が、継手パイプ４１の外径より小さい内径の
小径部３３ｄ2 とされている。Further, the low pressure side port 33d is
The portion near one end surface 33e of the low pressure side port 33
is a large diameter portion 33d 1 of internal diameter corresponding to the outer diameter of the joint pipe 41 connected to d, the other end face 33 of the base plate portion 33a
f closer moiety is a small-diameter portion 33d 2 of the inner diameter smaller than the outer diameter of the joint pipes 41.
【００８１】前記連結部３３ｇは、弁ハウジング３１の
内径に対応する内径で形成されており、連結部３３ｇの
一端寄りの内周面部分には、基板部３３ａの外径に対応
する内径の大径部３３ｈが、基板部３３ａの厚みよりも
若干大きい長さ寸法で形成されている。The connecting portion 33g has an inner diameter corresponding to the inner diameter of the valve housing 31, and an inner peripheral surface near one end of the connecting portion 33g has a large inner diameter corresponding to the outer diameter of the substrate portion 33a. The diameter portion 33h is formed with a length slightly larger than the thickness of the substrate portion 33a.
【００８２】尚、図５中引用符号３３ｊは、大径部３３
ｈと共に段差状を呈する連結部３３ｇの内周面を構成す
る小径部を示し、この小径部３３ｊが、先に述べた通
り、弁ハウジング３１の内径に対応する内径で形成され
ている。Incidentally, the reference numeral 33j in FIG.
The small-diameter portion 33j constitutes the inner peripheral surface of the connecting portion 33g having a stepped shape together with h. The small-diameter portion 33j has an inner diameter corresponding to the inner diameter of the valve housing 31 as described above.
【００８３】また、弁ハウジング３１は、図１を参照し
て説明した一般的なロータリ式四方弁１の弁ハウジング
３と略同様に構成されているため、ここでの改めての説
明は省略する。The valve housing 31 has substantially the same configuration as the valve housing 3 of the general rotary type four-way valve 1 described with reference to FIG. 1, so that the description is omitted here.
【００８４】上述した構成の基板部３３ａは、他方の端
面３３ｆ側から連結部３３ｇの大径部３３ｈに挿入、嵌
合され、小径部３３ｊとの段差に突き当たるまで大径部
３３ｈに基板部３３ａを挿入し嵌合した状態で、連結部
３３ｇの一端部分を加締め等することで、基板部３３ａ
が連結部３３ｇに対して固定されて、弁座３３とされ
る。The board portion 33a having the above-described configuration is inserted and fitted into the large-diameter portion 33h of the connecting portion 33g from the other end surface 33f side, and is attached to the large-diameter portion 33h until it hits a step with the small-diameter portion 33j. Is inserted and fitted, by crimping one end of the connecting portion 33g, etc.
Is fixed to the connecting portion 33g to form the valve seat 33.
【００８５】そして、弁座３３の弁ハウジング３１に対
する取り付けは、弁座３３の連結部３３ｇの他端を弁ハ
ウジング３１の開放端に接合させた状態で、少なくとも
これら接合部分の周囲を不活性ガス雰囲気下におき、従
来公知の固体又は気体、或は、半導体レーザを用いたレ
ーザ溶接か、或は、Ｔｉｇ（タングステン・イナート・
ガス）溶接に代表される、非溶極式アーク溶接によっ
て、弁ハウジング３１の開放端と弁座３３の連結部３３
ｇの他端との接合部分を溶着することで行う。The valve seat 33 is attached to the valve housing 31 with the other end of the connecting portion 33g of the valve seat 33 joined to the open end of the valve housing 31, and at least the periphery of these joints is inert gas. Under an atmosphere, a conventionally known solid or gas, laser welding using a semiconductor laser, or Tig (tungsten inert
The connecting portion 33 between the open end of the valve housing 31 and the valve seat 33 by non-fused arc welding represented by gas) welding.
This is performed by welding a joint portion with the other end of g.
【００８６】このような第１実施形態のロータリ式四方
弁によれば、他の元素との反応を起こさず高温が得られ
るレーザ溶接か非溶極式アーク溶接により弁座３３を弁
ハウジング３１に溶着することから、溶接する弁座３３
の連結部３３ｇの範囲を小さくしても弁座３３を弁ハウ
ジング３１に強固に取り付けることができ、その結果、
溶接により溶かされた連結部３３ｇの他端部分が冷却固
化しても、その際の収縮により弁座３３、特に、基板部
３３ａが全体的に歪んで平面度が低下し、弁ハウジング
３１との間に漏れを生じるような隙間が空くのを防止す
ることができる。According to the rotary type four-way valve of the first embodiment, the valve seat 33 is connected to the valve housing 31 by laser welding or non-fusing electrode arc welding, which does not cause a reaction with other elements and can obtain a high temperature. The valve seat 33 to be welded because of welding
Even if the range of the connecting portion 33g is reduced, the valve seat 33 can be firmly attached to the valve housing 31. As a result,
Even if the other end portion of the connecting portion 33g melted by welding is cooled and solidified, the contraction at that time causes the entire valve seat 33, particularly the substrate portion 33a, to be distorted and the flatness is reduced, and the flatness is reduced. It is possible to prevent a gap that may cause a leak between them.
【００８７】また、第１実施形態のロータリ式四方弁に
よれば、弁ハウジング３１の開放端と弁座３３の連結部
３３ｇの他端との接合部分を、他の元素との反応を起こ
さず高温が得られるレーザ溶接か非溶極式アーク溶接に
より溶着することから、弁ハウジング３１が薄肉であっ
たとしても、高い密閉度で弁座３３を弁ハウジング３１
に取り付けることができる。According to the rotary type four-way valve of the first embodiment, the joint between the open end of the valve housing 31 and the other end of the connecting portion 33g of the valve seat 33 does not react with other elements. Even if the valve housing 31 is thin, the valve seat 33 can be sealed with a high degree of sealing because the valve housing 31 is thinly welded by laser welding or non-fused arc welding that can obtain a high temperature.
Can be attached to
【００８８】しかも、第１実施形態のロータリ式四方弁
によれば、ロータリ式四方弁の一般的な概略構成の説明
でも述べたように、弁ハウジング３１がステンレスのよ
うな金属製であっても、溶接の際の酸化現象による気泡
が弁ハウジング３１の内部に生じることがなく、その後
の使用により破損して冷媒の漏れを生じることがないよ
うに、耐圧性良く弁座３３を弁ハウジング３１に取り付
けることができる。Further, according to the rotary four-way valve of the first embodiment, as described in the general schematic configuration of the rotary four-way valve, even if the valve housing 31 is made of metal such as stainless steel. The valve seat 33 is attached to the valve housing 31 with good pressure resistance so that bubbles due to the oxidation phenomenon during welding do not occur inside the valve housing 31 and the refrigerant does not leak due to subsequent use. Can be attached.
【００８９】その上、第１実施形態のロータリ式四方弁
によれば、基板部３３ａが弁ハウジング３１の肉厚より
大きい厚みで形成されていることから、弁座３３の基板
部３３ａを連結部３３ｇに取り付ける際に、薄肉の弁ハ
ウジング３１を対象とするが故の、上述した不活性ガス
雰囲気下におけるレーザ溶接や非溶極式アーク溶接とい
った取付手段上の制約を減らし、例えば、上述した加締
めのような、簡単で廉価な多種多様の取付手段を用いる
ことができる。In addition, according to the rotary type four-way valve of the first embodiment, since the board portion 33a is formed with a thickness larger than the thickness of the valve housing 31, the board portion 33a of the valve seat 33 is connected to the connecting portion. Since the thin valve housing 31 is targeted for mounting at 33 g, restrictions on mounting means such as laser welding or non-melting arc welding under an inert gas atmosphere described above are reduced. A wide variety of simple and inexpensive attachment means, such as fastening, can be used.
【００９０】次に、図６を参照して本発明の第２実施形
態によるロータリ式四方弁を説明する。図６は本発明の
第２実施形態によるロータリ式四方弁の要部を断面で示
す説明図であり、第２実施形態のロータリ式四方弁にお
いては、弁ハウジング３１と主弁体３５が第１実施形態
のロータリ式四方弁と同様のものとされており、図６中
引用符号３３Ａで示す弁座の構成が、第１実施形態のロ
ータリ式四方弁における弁座３３とは異なっている。Next, a rotary four-way valve according to a second embodiment of the present invention will be described with reference to FIG. FIG. 6 is an explanatory view showing a cross section of a main part of a rotary type four-way valve according to a second embodiment of the present invention. In the rotary type four-way valve of the second embodiment, the valve housing 31 and the main valve body 35 are the first type. This is the same as the rotary four-way valve of the embodiment, and the configuration of the valve seat indicated by reference numeral 33A in FIG. 6 is different from the valve seat 33 of the rotary four-way valve of the first embodiment.
【００９１】そして、第２実施形態のロータリ式四方弁
における弁座３３Ａは、弁ハウジング３１の厚みより僅
かに大きい厚みの円板状を呈する２枚の板材３３Ａａ，
３３Ａｅを重ね合わせて構成されており、板材３３Ａａ
は弁ハウジング３１の内径に対応する外径で、また、板
材３３Ａｅは弁ハウジング３１の外径よりも大きい外径
で各々形成されている。The valve seat 33A of the rotary four-way valve according to the second embodiment has two plate members 33Aa, 33Aa, which have a disk shape slightly larger than the thickness of the valve housing 31.
33Ae are overlapped, and the plate material 33Aa
Is an outer diameter corresponding to the inner diameter of the valve housing 31, and the plate 33Ae is formed with an outer diameter larger than the outer diameter of the valve housing 31.
【００９２】前記板材３３Ａａには、その両端面間を貫
通して、回転軸３７が嵌入される回転軸孔３３Ａｂと、
第１及び第２の２つの切換ポート（図示せず）と、圧縮
機の吐出側が接続される高圧側ポート３３Ａｃと、圧縮
機の吸入側が接続される低圧側ポート３３Ａｄとが各々
形成されている。A rotation shaft hole 33Ab into which the rotation shaft 37 is fitted is formed in the plate member 33Aa so as to penetrate between both end surfaces thereof.
First and second two switching ports (not shown), a high pressure side port 33Ac to which the discharge side of the compressor is connected, and a low pressure side port 33Ad to which the suction side of the compressor is connected are formed respectively. .
【００９３】また、前記板材３３Ａｅにも、その両端面
間を貫通して、回転軸３７が嵌入される回転軸孔３３Ａ
ｆと、第１及び第２の２つの切換ポート（図示せず）
と、圧縮機の吐出側が接続される高圧側ポート３３Ａｇ
と、圧縮機の吸入側が接続される低圧側ポート３３Ａｈ
とが、板材３３Ａａを板材３３Ａｅに同心上に重ね合わ
せた状態で、対応する回転軸孔３３Ａｂや第１及び第２
の各切換ポート、高圧側及び低圧側の各ポート３３Ａ
ｃ，３３Ａｄと同心上に位置するように、各々形成され
ている。The plate 33Ae is also provided with a rotary shaft hole 33A through which the rotary shaft 37 is inserted.
f, first and second two switching ports (not shown)
And the high pressure side port 33Ag to which the discharge side of the compressor is connected
And the low pressure side port 33Ah to which the suction side of the compressor is connected
In the state where the plate material 33Aa is concentrically superimposed on the plate material 33Ae, the corresponding rotation shaft hole 33Ab and the first and second
, Each high-pressure side port and each low-pressure side port 33A
c and 33Ad are formed concentrically with each other.
【００９４】尚、板材３３Ａａの回転軸孔３３Ａｂは第
１実施形態の弁座３３の大径部３３ｂ2 と同様の内径
で、第１及び第２の２つの切換ポートは弁座３３の第１
及び第２の２つの切換ポートと同様の内径で、高圧側ポ
ート３３Ａｃは弁座３３の大径部３３ｃ2 と同様の内径
で、低圧側ポート３３Ａｄは弁座３３の小径部３３ｄ2
と同様の内径で各々形成されている。[0094] The rotary shaft hole 33Ab of the plate 33Aa the same inner diameter as the large diameter portion 33b 2 of the valve seat 33 of the first embodiment, first the first and second two switching port valve seat 33
And the second two similar inner and switching port, in the same inner diameter as the large diameter portion 33c 2 of the high-pressure port 33Ac valve seat 33, the small diameter portion 33d 2 of the low-pressure side port 33Ad valve seat 33
Each of them has the same inner diameter as that of.
【００９５】また、板材３３Ａｅの回転軸孔３３Ａｆは
弁座３３の小径部３３ｂ1 と同様の内径で、第１及び第
２の２つの切換ポートは弁座３３の第１及び第２の２つ
の切換ポートと同様の内径で、高圧側ポート３３Ａｇは
弁座３３の小径部３３ｃ1 と同様の内径で、低圧側ポー
ト３３Ａｈは弁座３３の大径部３３ｄ1 と同様の内径で
各々形成されている。[0095] Further, the rotation shaft hole 33Af plate member 33Ae the same inner diameter as the small diameter portion 33b 1 of the valve seat 33, the two first and second switching ports of the two first and second valve seat 33 in the same inner diameter and the switching port, in the same inner diameter as the small diameter portion 33c 1 of the high-pressure side port 33Ag valve seat 33, the low-pressure side port 33Ah is formed respectively in the same inner diameter as the large diameter portion 33d 1 of the valve seat 33 I have.
【００９６】さらに、第２実施形態では、板材３３Ａａ
を同心上に重ね合わせた状態で板材３３Ａａの外方に位
置する板材３３Ａｅの外周縁部分が、弁ハウジング３１
の内径に対応する内径の環状にプレス加工等により折曲
されており、この環状を呈する板材３３Ａｅの先端寄り
の外周面部分が、弁ハウジング３１の厚みと同様の厚み
になるように、段差状に薄肉化されている。Further, in the second embodiment, the plate material 33Aa
Are concentrically superimposed on each other and the outer peripheral edge of the plate 33Ae located outside the plate 33Aa is connected to the valve housing 31.
The plate 33Ae is bent into an annular shape having an inner diameter corresponding to the inner diameter of the valve member 31Ae. It is thinned.
【００９７】そして、第２実施形態では、環状を呈する
板材３３Ａｅの外周縁部分により連結部３３Ａｊが構成
されており、また、板材３３Ａｅの環状を呈する外周縁
部分の内側の板材３３Ａｅ部分と、これに重ね合わせた
板材３３Ａａとにより、弁ハウジング３１の厚みよりも
十分に大きい厚みの円板状を呈する基板部３３Ａｋが構
成されている。In the second embodiment, the connecting portion 33Aj is formed by the outer peripheral edge of the annular plate 33Ae, and the inner plate 33Ae of the annular outer peripheral portion of the plate 33Ae, And a plate 33Aa having a disk shape having a thickness sufficiently larger than the thickness of the valve housing 31.
【００９８】このように構成された弁座３３Ａの弁ハウ
ジング３１に対する取り付けは、弁座３３Ａの連結部３
３Ａｊの先端を弁ハウジング３１の開放端に接合させた
状態で、第１実施形態と同様に、少なくともこれら接合
部分の周囲を不活性ガス雰囲気下におき、レーザ溶接
か、或は、非溶極式アーク溶接によって、弁ハウジング
３１の開放端と弁座３３Ａの連結部３３Ａｊの先端との
接合部分を溶着することで行う。The thus constructed valve seat 33A is attached to the valve housing 31 by connecting the valve seat 33A to the connecting portion 3 of the valve seat 33A.
With the tip of 3Aj joined to the open end of the valve housing 31, at least the periphery of these joints is placed under an inert gas atmosphere as in the first embodiment, and either laser welding or non-welding is performed. The welding is performed by welding the joint between the open end of the valve housing 31 and the distal end of the connecting portion 33Aj of the valve seat 33A by the arc welding.
【００９９】このような第２実施形態のロータリ式四方
弁によっても、第１実施形態のロータリ式四方弁と同様
に、溶接する弁座３３Ａの連結部３３Ａｊの範囲を小さ
くしても弁座３３Ａを弁ハウジング３１に強固に取り付
けることができ、その結果、溶接により溶かされた連結
部３３Ａｊの先端部分が冷却固化しても、その際の収縮
により弁座３３Ａ、特に、連結部３３Ａｊの先端部分が
全体的に歪んで平面度が低下し、主弁体５との間に漏れ
を生じるような隙間が空くのを防止することができる。In the rotary type four-way valve according to the second embodiment, similarly to the rotary type four-way valve according to the first embodiment, even if the range of the connecting portion 33Aj of the valve seat 33A to be welded is reduced, the valve seat 33A is not required. Can be firmly attached to the valve housing 31. As a result, even if the distal end portion of the connection portion 33Aj melted by welding is cooled and solidified, the contraction at that time causes the valve seat 33A, particularly the distal end portion of the connection portion 33Aj. Is distorted as a whole and the flatness is reduced, so that it is possible to prevent a gap from occurring between the main valve body 5 and the space.
【０１００】また、第２実施形態のロータリ式四方弁に
よっても、第１実施形態のロータリ式四方弁と同様に、
弁ハウジング３１の開放端と弁座３３Ａの連結部３３Ａ
ｊの先端との接合部分を、他の元素との反応を起こさず
高温が得られるレーザ溶接か非溶極式アーク溶接により
溶着することから、弁ハウジング３１が薄肉であったと
しても、高い密閉度で耐圧性良く弁座３３Ａを弁ハウジ
ング３１に取り付けることができる。Also, according to the rotary four-way valve of the second embodiment, similarly to the rotary four-way valve of the first embodiment,
Connection portion 33A between open end of valve housing 31 and valve seat 33A
Since the joint with the tip of j is welded by laser welding or non-welding type arc welding, which does not cause a reaction with other elements to obtain a high temperature, even if the valve housing 31 is thin, high sealing is achieved. The valve seat 33A can be attached to the valve housing 31 with good pressure resistance.
【０１０１】しかも、第２実施形態のロータリ式四方弁
によれば、基板部３３Ａｋを構成する板材３３Ａｅの外
周縁部分により連結部３３Ａｊが一体に構成されている
ことから、基板部３３Ａｋの連結部３３Ａｊに対する取
り付け作業とそのための手段とが不要になる分、構成を
簡略化することができる。Further, according to the rotary four-way valve of the second embodiment, since the connecting portion 33Aj is integrally formed by the outer peripheral portion of the plate 33Ae constituting the substrate portion 33Ak, the connecting portion of the substrate portion 33Ak is formed. The configuration can be simplified to the extent that the attachment work to 33Aj and the means therefor are not required.
【０１０２】その上、第２実施形態のロータリ式四方弁
によれば、基板部３３Ａｋを構成する２枚の板材３３Ａ
ａ，３３Ａｅに、回転軸孔３３Ａｂ，３３Ａｆ、高圧側
ポート３３Ａｃ，３３Ａｇ、及び、低圧側ポート３３Ａ
ｄ，３３Ａｈを、互いに異なる内径で各々形成すること
で、段差を有する孔やポートが基板部３３Ａｋに形成さ
れることになるため、これら段差を有する孔やポートを
容易に、しかも高精度に形成することができる。In addition, according to the rotary four-way valve of the second embodiment, the two plate members 33A constituting the substrate portion 33Ak.
a, 33Ae, rotary shaft holes 33Ab, 33Af, high pressure side ports 33Ac, 33Ag, and low pressure side port 33A.
By forming d and 33Ah with different inner diameters, holes and ports having steps are formed in the substrate portion 33Ak, so that holes and ports having these steps are formed easily and with high precision. can do.
【０１０３】尚、図７に第２実施形態の第１変形例によ
るロータリ式四方弁の要部を断面で示す説明図で示すよ
うに、基板部３３Ａｋを構成する２枚の板材３３Ａａ，
３３Ａｅのうち連結部３３Ａｊが一体に形成される板材
３３Ａｅの厚みを、全体に亘り弁ハウジング３１の厚み
と同様となる薄肉のものとし、その代わりにもう１枚の
板材３３Ａａの厚みを大きくすれば、基板部３３Ａｋと
しての必要な厚みを確保しつつ、板材３３Ａｅの外周縁
部分を弁ハウジング３１の内径に対応する内径の環状に
折曲する際のプレス加工等を、薄肉となる分だけ容易に
することができる。As shown in FIG. 7 which is an explanatory view showing a cross section of a main part of a rotary type four-way valve according to a first modification of the second embodiment, two plate members 33Aa, 33Aa,
If the thickness of the plate 33Ae in which the connecting portion 33Aj is integrally formed of the 33Ae is made as thin as the thickness of the valve housing 31 over the entirety, and instead, the thickness of another plate 33Aa is increased. In addition, pressing while bending the outer peripheral edge portion of the plate material 33Ae into an annular shape having an inner diameter corresponding to the inner diameter of the valve housing 31 can be easily performed while securing the necessary thickness of the substrate portion 33Ak, as much as the thin portion. can do.
【０１０４】また、図７の第１変形例によれば、回転軸
孔３３Ａｂ，３３Ａｆ、高圧側ポート３３Ａｃ，３３Ａ
ｇ、及び、低圧側ポート３３Ａｄ，３３Ａｈに各々設け
る段差のうち一方を他方よりも大きい寸法とすることが
できる。According to the first modification of FIG. 7, the rotary shaft holes 33Ab, 33Af, the high pressure side ports 33Ac, 33A
g and one of the steps provided in the low-pressure side ports 33Ad and 33Ah can be made larger than the other.
【０１０５】そして、板材３３Ａｅの外周縁部分を環状
に折曲する際のプレス加工等を容易にできるようにした
まま、図７に示す寸法比とは逆の寸法比で、回転軸孔３
３Ａｂ，３３Ａｆ、高圧側ポート３３Ａｃ，３３Ａｇ、
低圧側ポート３３Ａｄ，３３Ａｈに段差を設けたいので
あれば、例えば、図８に要部を断面で示す説明図で示す
第２実施形態の第２変形例によるロータリ式四方弁を採
用することもできる。Then, while facilitating press working or the like when the outer peripheral edge portion of the plate material 33Ae is bent in an annular shape, the rotation shaft hole 3 has a size ratio opposite to the size ratio shown in FIG.
3Ab, 33Af, high pressure side ports 33Ac, 33Ag,
If it is desired to provide a step in the low pressure side ports 33Ad and 33Ah, for example, a rotary type four-way valve according to a second modified example of the second embodiment shown in an explanatory view showing a cross section of a main part in FIG. 8 can be adopted. .
【０１０６】即ち、図８に示すように、板材３３Ａａ，
３３Ａｅの間に板材３３Ａｍを１枚加えて基板部３３Ａ
ｋを３枚の板材３３Ａａ，３３Ａｅ，３３Ａｍにより構
成し、板材３３Ａａ，３３Ａｅの間に加える板材３３Ａ
ｍに、板材３３Ａｅの回転軸孔３３Ａｆ、高圧側ポート
３３Ａｇ、及び、低圧側ポート３３Ａｈと各々同じ内径
で、これらの孔やポートを第１及び第２の２つの切換ポ
ート（いずれも符号は省略する）と共に形成すればよ
い。That is, as shown in FIG. 8, the plate members 33Aa,
33Ae, one plate material 33Am is added between the substrate portions 33Ae.
k is composed of three plate members 33Aa, 33Ae, and 33Am, and is added between the plate members 33Aa and 33Ae.
m has the same inner diameter as the rotation shaft hole 33Af, the high-pressure side port 33Ag, and the low-pressure side port 33Ah of the plate 33Ae, and these holes and ports are first and second two switching ports (all symbols are omitted). ).
【０１０７】そして、図８の第２変形例によれば、回転
軸孔３３Ａｂ，３３Ａｆ、高圧側ポート３３Ａｃ，３３
Ａｇ、及び、低圧側ポート３３Ａｄ，３３Ａｈに各々設
ける段差のうち一方を他方よりも大きい寸法とするに当
たり、薄肉の２枚の板材３３Ａｅ，３３Ａｍに孔やポー
トを各々同じ内径で形成して重ねることで、大きい寸法
となる孔やポート部分を容易に、しかも高精度に形成す
ることができる。According to the second modification shown in FIG. 8, the rotary shaft holes 33Ab, 33Af, the high pressure side ports 33Ac, 33
In order to make one of the steps provided in the Ag and the low pressure side ports 33Ad and 33Ah larger than the other, holes and ports are formed in the two thin plates 33Ae and 33Am with the same inner diameter, and are stacked. Thus, a hole or a port portion having a large size can be easily formed with high precision.
【０１０８】次に、図９を参照して本発明の第３実施形
態によるロータリ式四方弁を説明する。図９は本発明の
第３実施形態によるロータリ式四方弁の要部を断面で示
す説明図であり、第３実施形態のロータリ式四方弁にお
いては、主弁体３５が第１実施形態のロータリ式四方弁
と同様のものとされている。Next, a rotary four-way valve according to a third embodiment of the present invention will be described with reference to FIG. FIG. 9 is an explanatory view showing, in cross section, a main part of a rotary type four-way valve according to a third embodiment of the present invention. In the rotary type four-way valve according to the third embodiment, the main valve body 35 is the rotary type according to the first embodiment. It is the same as the four-way valve.
【０１０９】また、第３実施形態のロータリ式四方弁に
おいては、図９中引用符号３１Ｂで示す弁ハウジング
が、第１実施形態における弁ハウジング３１よりも、主
弁体３５の回転軸方向において若干大きめの寸法に形成
されていて、さらに、図９中引用符号３３Ｂで示す弁座
の構成が、第１実施形態のロータリ式四方弁における弁
座３３とは異なっている。In the rotary four-way valve according to the third embodiment, the valve housing indicated by reference numeral 31B in FIG. 9 is slightly smaller in the rotation axis direction of the main valve body 35 than the valve housing 31 in the first embodiment. The configuration of the valve seat, which is formed to have a large size and is indicated by reference numeral 33B in FIG. 9, is different from the valve seat 33 in the rotary four-way valve of the first embodiment.
【０１１０】そして、第３実施形態のロータリ式四方弁
における弁座３３Ｂは、弁ハウジング３１Ｂの厚みより
も大きい厚みの円板状を呈する板材３３Ｂａと、弁ハウ
ジング３１Ｂの厚みと同様の厚みの円板状を呈する板材
３３Ｂｅとを重ね合わせて構成されており、板材３３Ｂ
ａは弁ハウジング３１Ｂの内径に対応する外径で、ま
た、板材３３Ｂｅは弁ハウジング３１Ｂの外径よりも大
きい外径で各々形成されている。The valve seat 33B of the rotary four-way valve according to the third embodiment has a disk-shaped plate 33Ba having a thickness greater than the thickness of the valve housing 31B, and a circle having a thickness similar to the thickness of the valve housing 31B. The plate 33B is formed by superimposing a plate 33Be having a plate shape.
a is an outer diameter corresponding to the inner diameter of the valve housing 31B, and the plate 33Be is formed with an outer diameter larger than the outer diameter of the valve housing 31B.
【０１１１】前記板材３３Ｂａには、その両端面間を貫
通して、回転軸３７が嵌入される回転軸孔３３Ｂｂと、
第１及び第２の２つの切換ポート（図示せず）と、圧縮
機の吐出側が接続される高圧側ポート３３Ｂｃと、圧縮
機の吸入側が接続される低圧側ポート３３Ｂｄとが各々
形成されている。The plate member 33Ba has a rotation shaft hole 33Bb penetrating between both end surfaces thereof and into which the rotation shaft 37 is fitted.
First and second two switching ports (not shown), a high pressure side port 33Bc to which the discharge side of the compressor is connected, and a low pressure side port 33Bd to which the suction side of the compressor is connected are respectively formed. .
【０１１２】また、前記板材３３Ｂｅにも、その両端面
間を貫通して、回転軸３７が嵌入される回転軸孔３３Ｂ
ｆと、第１及び第２の２つの切換ポート（図示せず）
と、圧縮機の吐出側が接続される高圧側ポート３３Ｂｇ
と、圧縮機の吸入側が接続される低圧側ポート３３Ｂｈ
とが、板材３３Ｂａを板材３３Ｂｅに同心上に重ね合わ
せた状態で、対応する回転軸孔３３Ｂｂや第１及び第２
の各切換ポート、高圧側及び低圧側の各ポート３３Ｂ
ｃ，３３Ｂｄと同心上に位置するように、各々形成され
ている。The plate 33Be is also provided with a rotary shaft hole 33B through which the rotary shaft 37 is inserted.
f, first and second two switching ports (not shown)
And the high pressure side port 33Bg to which the discharge side of the compressor is connected
And the low pressure side port 33Bh to which the suction side of the compressor is connected
In a state where the plate 33Ba is concentrically superimposed on the plate 33Be, the corresponding rotation shaft holes 33Bb and the first and second plates 33Ba are formed.
Each switching port, each port 33B on the high pressure side and the low pressure side
c and 33Bd are formed concentrically with each other.
【０１１３】尚、板材３３Ｂａの回転軸孔３３Ｂｂは第
１実施形態の弁座３３の大径部３３ｂ2 と同様の内径
で、第１及び第２の２つの切換ポートは弁座３３の第１
及び第２の２つの切換ポートと同様の内径で、高圧側ポ
ート３３Ｂｃは弁座３３の大径部３３ｃ2 と同様の内径
で、低圧側ポート３３Ｂｄは弁座３３の小径部３３ｄ2
と同様の内径で各々形成されている。[0113] The rotary shaft hole 33Bb of the plate 33Ba in the same inner diameter as the large diameter portion 33b 2 of the valve seat 33 of the first embodiment, first the first and second two switching port valve seat 33
And the second two similar inner and switching port, in the same inner diameter as the large diameter portion 33c 2 of the high-pressure port 33Bc valve seat 33, the small diameter portion 33d 2 of the low-pressure side port 33Bd valve seat 33
Each of them has the same inner diameter as that of.
【０１１４】また、板材３３Ｂｅの回転軸孔３３Ｂｆは
弁座３３の小径部３３ｂ1 と同様の内径で、第１及び第
２の２つの切換ポートは弁座３３の第１及び第２の２つ
の切換ポートと同様の内径で、高圧側ポート３３Ｂｇは
弁座３３の小径部３３ｃ1 と同様の内径で、低圧側ポー
ト３３Ｂｈは弁座３３の大径部３３ｄ1 と同様の内径で
各々形成されている。[0114] Further, the rotation shaft hole 33Bf plate member 33Be in the same inner diameter as the small diameter portion 33b 1 of the valve seat 33, the two first and second switching ports of the two first and second valve seat 33 in the same inner diameter and the switching port, in the same inner diameter as the small diameter portion 33c 1 of the high-pressure side port 33Bg valve seat 33, the low-pressure side port 33Bh is formed respectively in the same inner diameter as the large diameter portion 33d 1 of the valve seat 33 I have.
【０１１５】さらに、第３実施形態では、板材３３Ｂａ
を同心上に重ね合わせた状態で板材３３Ｂａの外方に位
置する板材３３Ｂｅの外周縁部分がプレス加工等により
折曲されて、弁ハウジング３１Ｂの内径に対応する外径
の円筒部３３Ｂｊが形成され、この円筒部３３Ｂｊの先
端部分がさらにプレス加工等により折曲されて、弁ハウ
ジング３１Ｂの外径に対応する外径の環状を呈するフラ
ンジ部３３Ｂｋが形成されている。Further, in the third embodiment, the plate material 33Ba
The outer peripheral edge portion of the plate 33Be located outside the plate 33Ba is concentrically superimposed and bent by pressing or the like to form a cylindrical portion 33Bj having an outer diameter corresponding to the inner diameter of the valve housing 31B. The distal end portion of the cylindrical portion 33Bj is further bent by press working or the like to form a flange portion 33Bk having an annular shape with an outer diameter corresponding to the outer diameter of the valve housing 31B.
【０１１６】このように構成された弁座３３Ｂの弁ハウ
ジング３１Ｂに対する取り付けは、板材３３Ｂａと板材
３３Ｂｅの円筒部３３Ｂｊとが弁ハウジング３１Ｂの開
放端から内部に各々挿入されるように、板材３３Ｂｅの
フランジ部３３Ｂｋの一面を弁ハウジング３１Ｂの開放
端に接合させた状態で、第１実施形態と同様に、少なく
ともこれら接合部分の周囲を不活性ガス雰囲気下にお
き、レーザ溶接か、或は、非溶極式アーク溶接によっ
て、弁ハウジング３１Ｂの開放端と、弁座３３Ｂの板材
３３Ｂｅのうちフランジ部３３Ｂｋの一面との接合部分
を、溶着することで行う。The valve seat 33B thus configured is attached to the valve housing 31B such that the plate 33Ba and the cylindrical portion 33Bj of the plate 33Be are inserted into the valve housing 31B from the open end thereof. In a state where one surface of the flange portion 33Bk is joined to the open end of the valve housing 31B, at least the periphery of these joints is placed in an inert gas atmosphere as in the first embodiment, and laser welding or non-welding is performed. This is performed by welding the joint between the open end of the valve housing 31B and one surface of the flange portion 33Bk of the plate material 33Be of the valve seat 33B by electrode welding.
【０１１７】このような第３実施形態のロータリ式四方
弁によっても、第１実施形態のロータリ式四方弁と同様
に、溶接する弁座３３Ｂのフランジ部３３Ｂｋの範囲を
小さくしても弁座３３Ｂを弁ハウジング３１Ｂに強固に
取り付けることができ、その結果、溶接により溶かされ
たフランジ部３３Ｂｋの一面が冷却固化しても、その際
の収縮により弁座３３Ｂ、特に、板材３３Ｂｅが全体的
に歪んで平面度が低下し、主弁体５との間に漏れを生じ
るような隙間が空くのを防止することができる。In the rotary four-way valve according to the third embodiment, similarly to the rotary four-way valve according to the first embodiment, even if the range of the flange portion 33Bk of the valve seat 33B to be welded is reduced, the valve seat 33B is not required. Can be firmly attached to the valve housing 31B. As a result, even if one surface of the flange portion 33Bk melted by welding is cooled and solidified, the valve seat 33B, in particular, the plate material 33Be is entirely distorted due to shrinkage at that time. Therefore, it is possible to prevent a gap that may cause a decrease in flatness and a leak between the main valve body 5 and the main valve body 5.
【０１１８】また、第３実施形態のロータリ式四方弁に
よっても、第１実施形態のロータリ式四方弁と同様に、
弁ハウジング３１Ｂの開放端と、板材３３Ｂｅのフラン
ジ部３３Ｂｋの一面との接合部分を、他の元素との反応
を起こさず高温が得られるレーザ溶接か非溶極式アーク
溶接により溶着することから、弁ハウジング３１Ｂが薄
肉であったとしても、高い密閉度で耐圧性良く弁座３３
Ｂを弁ハウジング３１Ｂに取り付けることができる。Also, according to the rotary four-way valve of the third embodiment, similarly to the rotary four-way valve of the first embodiment,
Since the joint between the open end of the valve housing 31B and one surface of the flange portion 33Bk of the plate material 33Be is welded by laser welding or non-polarized arc welding in which a high temperature is obtained without causing a reaction with other elements, Even if the valve housing 31B is thin, the valve seat 33 has a high degree of sealing and good pressure resistance.
B can be attached to the valve housing 31B.
【０１１９】しかも、第３実施形態のロータリ式四方弁
によれば、弁座３３Ｂを構成する２枚の板材３３Ｂａ，
３３Ｂｅに、回転軸孔３３Ｂｂ，３３Ｂｆ、高圧側ポー
ト３３Ｂｃ，３３Ｂｇ、及び、低圧側ポート３３Ｂｄ，
３３Ｂｈを、互いに異なる内径で各々形成することで、
段差を有する孔やポートが弁座３３Ｂに形成されること
になるため、これら段差を有する孔やポートを容易に、
しかも高精度に形成することができる。Further, according to the rotary four-way valve of the third embodiment, the two plate members 33Ba,
The rotation shaft holes 33Bb, 33Bf, the high pressure side ports 33Bc, 33Bg, and the low pressure side port 33Bd,
By forming 33Bh with mutually different inner diameters,
Since holes and ports having steps are formed in the valve seat 33B, these holes and ports having steps can be easily formed.
Moreover, it can be formed with high precision.
【０１２０】尚、図示は省略するものの、弁ハウジング
３１Ｂの厚みと同様の厚みの円板状を呈する２枚の板材
を重ねて板材３３Ｂａを構成すれば、回転軸孔３３Ｂ
ｂ、高圧側ポート３３Ｂｃ、及び、低圧側ポート３３Ｂ
ｄに相当する孔やポートを各板材に各々個別に形成する
ことで、板材３３Ｂａよりも薄肉の板材の状態で孔やポ
ートを容易に形成することができる。Although not shown, if two plate members 33Ba having the same thickness as the valve housing 31B are laminated to form the plate member 33Ba, the rotation shaft hole 33B is formed.
b, high pressure side port 33Bc and low pressure side port 33B
By individually forming the holes and ports corresponding to d on each plate, the holes and ports can be easily formed in a state of a plate thinner than the plate 33Ba.
【０１２１】また、孔やポートを容易に形成できるよう
にしたまま、図９に示す寸法比とは逆の寸法比で、回転
軸孔３３Ｂｂ，３３Ｂｆ、高圧側ポート３３Ｂｃ，３３
Ｂｇ、及び、低圧側ポート３３Ｂｄ，３３Ｂｈに段差を
設けたいのであれば、例えば、図１０に要部を断面で示
す説明図で示す第３実施形態の第１変形例によるロータ
リ式四方弁を採用することもできる。Further, while allowing the holes and ports to be easily formed, the rotation shaft holes 33Bb and 33Bf and the high pressure side ports 33Bc and 33 have a size ratio opposite to the size ratio shown in FIG.
If it is desired to provide a step in Bg and the low pressure side ports 33Bd and 33Bh, for example, a rotary four-way valve according to a first modified example of the third embodiment shown in an explanatory view showing a cross section of a main part in FIG. 10 is adopted. You can also.
【０１２２】即ち、図１０に示すように、板材３３Ｂａ
の厚みを弁ハウジング３１Ｂの厚みと同様の厚みとし、
板材３３Ｂａ，３３Ｂｅの間に板材３３Ｂｍを１枚加え
て弁座３３Ｂを３枚の板材３３Ｂａ，３３Ｂｅ，３３Ｂ
ｍにより構成して、板材３３Ｂａ，３３Ｂｅの間に加え
る板材３３Ｂｍに、板材３３Ｂｅの回転軸孔３３Ｂｆ、
高圧側ポート３３Ｂｇ、及び、低圧側ポート３３Ｂｈと
各々同じ内径で、これらの孔やポートを２つの切換ポー
ト（いずれも引用符号は省略する）と共に形成すればよ
い。That is, as shown in FIG.
Is the same thickness as the thickness of the valve housing 31B,
One plate 33Bm is added between the plates 33Ba, 33Be to make the valve seat 33B three plates 33Ba, 33Be, 33B.
m, and a plate member 33Bm added between the plate members 33Ba and 33Be, a rotation shaft hole 33Bf of the plate member 33Be,
These holes and ports may be formed together with two switching ports (both of which are omitted with reference numerals) with the same inner diameter as the high pressure side port 33Bg and the low pressure side port 33Bh.
【０１２３】そして、図１０の第１変形例によれば、回
転軸孔３３Ｂｆ、高圧側ポート３３Ｂｇ、及び、低圧側
ポート３３Ｂｈに各々設ける段差のうち一方を他方より
も大きい寸法とするに当たり、薄肉の２枚の板材３３Ｂ
ｅ，３３Ｂｍに孔やポートを各々同じ内径で形成して重
ねることで、大きい寸法となる孔やポート部分を容易
に、しかも高精度に形成することができる。According to the first modification shown in FIG. 10, when one of the steps provided in the rotary shaft hole 33Bf, the high-pressure side port 33Bg, and the low-pressure side port 33Bh is made larger than the other, a thin wall is required. Two plate materials 33B
By forming holes and ports with the same inner diameter on 33e and 33Bm, respectively, and overlapping them, holes and ports having large dimensions can be formed easily and with high precision.
【０１２４】さらに、図１１に第３実施形態の第２変形
例によるロータリ式四方弁の要部を断面で示す説明図で
示すように、板材３３Ｂｅの外周縁部分をプレス加工等
により折曲して、弁ハウジング３１Ｂの内径より若干大
きい外径の円筒部３３Ｂｊを形成し、この円筒部３３Ｂ
ｊの先端を残して円筒部３３Ｂｊの基端寄りの外周面部
分を弁ハウジング３１Ｂの内径に対応する外径に切削加
工することで、円筒部３３Ｂｊの先端に、弁ハウジング
３１Ｂの外径より若干小さく弁ハウジング３１Ｂの内径
より若干大きい外径のフランジ部３３Ｂｋ（溶着部に相
当）を形成し、このフランジ部３３Ｂｋの外径に合わせ
て、弁ハウジング３１Ｂの開放端寄りの外周面部分をテ
ーパ状に切削加工する構成としてもよい。Further, as shown in FIG. 11 which is an explanatory view showing a cross section of a main part of a rotary type four-way valve according to a second modification of the third embodiment, the outer peripheral edge portion of a plate 33Be is bent by press working or the like. To form a cylindrical portion 33Bj having an outer diameter slightly larger than the inner diameter of the valve housing 31B.
By cutting the outer peripheral portion near the base end of the cylindrical portion 33Bj to an outer diameter corresponding to the inner diameter of the valve housing 31B while leaving the distal end of j, the distal end of the cylindrical portion 33Bj is slightly smaller than the outer diameter of the valve housing 31B. A flange portion 33Bk (corresponding to a welded portion) having an outer diameter slightly smaller than the inner diameter of the valve housing 31B is formed, and the outer peripheral portion near the open end of the valve housing 31B is tapered in accordance with the outer diameter of the flange portion 33Bk. It is good also as composition which performs cutting processing.
【０１２５】このように構成すれば、弁ハウジング３１
Ｂの開放端と、弁座３３Ｂの板材３３Ｂｅのうちフラン
ジ部３３Ｂｋの一面との接合部分が、弁ハウジング３１
Ｂの径方向外方に若干露出することになるため、レーザ
溶接か、或は、非溶極式アーク溶接による溶着作業を、
スペースの面で行い易くすることができる。With this configuration, the valve housing 31
B, and a joint portion between the plate member 33Be of the valve seat 33B and one surface of the flange portion 33Bk is connected to the valve housing 31.
Because it will be slightly exposed to the outside in the radial direction of B, laser welding or welding work by non-welded arc welding,
This can be easily performed in terms of space.
【０１２６】また、上述したように構成すれば、板材３
３Ｂｅの円筒部３３Ｂｊの外周面を弁ハウジング３１Ｂ
の開放端寄りの内周面部分に密接させて、弁ハウジング
３１Ｂの開放端と、弁座３３Ｂの板材３３Ｂｅのうちフ
ランジ部３３Ｂｋの一面との接合部分に連なる接合範囲
を拡大して、溶着がより広い範囲で行われるようにし、
これにより、密閉度と耐圧性とを共により一層向上させ
ることができる。Further, according to the structure described above, the plate material 3
The outer peripheral surface of the 3Be cylindrical portion 33Bj is attached to the valve housing 31B.
To the inner peripheral surface near the open end of the valve housing 31B, and expands the joining range connected to the joining portion between the open end of the valve housing 31B and one surface of the flange portion 33Bk of the plate 33Be of the valve seat 33B. To be more extensive,
Thereby, both the degree of sealing and the pressure resistance can be further improved.
【０１２７】続いて、図１２を参照して本発明の第４実
施形態によるロータリ式四方弁を説明する。図１２は本
発明の第４実施形態によるロータリ式四方弁の要部を断
面で示す説明図であり、第４実施形態のロータリ式四方
弁においては、主弁体３５が第１実施形態のロータリ式
四方弁と同様のものとされている。Next, a rotary four-way valve according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 12 is an explanatory view showing a cross section of a main part of a rotary type four-way valve according to a fourth embodiment of the present invention. In the rotary type four-way valve according to the fourth embodiment, the main valve body 35 is the rotary type according to the first embodiment. It is the same as the four-way valve.
【０１２８】また、第４実施形態のロータリ式四方弁に
おいては、図１２中引用符号３１Ｃで示す弁ハウジング
が、第３実施形態における弁ハウジング３１Ｂと同様
に、第１実施形態における弁ハウジング３１よりも、主
弁体３５の回転軸方向において若干大きめの寸法に形成
されており、さらに、図１２中引用符号３３Ｃで示す弁
座の構成が、第１実施形態のロータリ式四方弁における
弁座３３とは異なっている。In the rotary four-way valve of the fourth embodiment, the valve housing indicated by reference numeral 31C in FIG. 12 is different from the valve housing 31 of the first embodiment in the same manner as the valve housing 31B of the third embodiment. Are also slightly larger in the direction of the rotation axis of the main valve body 35, and the configuration of the valve seat indicated by reference numeral 33C in FIG. Is different from
【０１２９】そして、第４実施形態のロータリ式四方弁
における弁座３３Ｃは、弁ハウジング３１Ｃの厚みより
大きい厚みの円板状を呈しており、この弁座３３Ｃに
は、その両端面間を貫通して、回転軸３７が嵌入される
回転軸孔３３Ｃａと、第１及び第２の２つの切換ポート
（図示せず）と、圧縮機の吐出側が接続される高圧側ポ
ート３３Ｃｂと、圧縮機の吸入側が接続される低圧側ポ
ート３３Ｃｃとが各々形成されている。The valve seat 33C of the rotary type four-way valve according to the fourth embodiment has a disk shape having a thickness larger than the thickness of the valve housing 31C. The rotation shaft hole 33Ca into which the rotation shaft 37 is fitted, the first and second switching ports (not shown), the high-pressure side port 33Cb to which the discharge side of the compressor is connected, A low pressure side port 33Cc to which the suction side is connected is formed.
【０１３０】このうち、回転軸孔３３Ｃａは、弁座３３
Ｃを弁ハウジング３１Ｃに取り付けた状態で弁ハウジン
グ３１Ｃの外方に露出する弁座３３Ｃの一方の端面３３
Ｃｄ寄り部分が、回転軸孔３３Ｃａに嵌入される回転軸
３７の外径に対応する内径の小径部３３Ｃａ1 とされ、
弁座３３Ｃの他方の端面３３Ｃｅ寄り部分が、回転軸３
７の外径より大きい内径の大径部３３Ｃａ2 とされてい
る。Of these, the rotary shaft hole 33Ca is provided with the valve seat 33.
One end face 33 of the valve seat 33C exposed to the outside of the valve housing 31C in a state where C is attached to the valve housing 31C.
Cd inner portion is, is a small-diameter portion 33Ca 1 of internal diameter corresponding to the outer diameter of the rotary shaft 37 is fitted into the rotation shaft hole 33Ca,
The other end face 33Ce of the valve seat 33C is
7, a large diameter portion 33Ca 2 having an inner diameter larger than the outer diameter.
【０１３１】また、高圧側ポート３３Ｃｂは、弁座３３
Ｃの一方の端面３３Ｃｄ寄り部分が、高圧側ポート３３
Ｃｂに連結される継手パイプ３９の外径に対応する内径
の小径部３３Ｃｂ1 とされ、弁座３３Ｃの他方の端面３
３Ｃｅ寄り部分が、継手パイプ３９の外径より大きい内
径の大径部３３Ｃｂ2 とされている。The high pressure side port 33Cb is connected to the valve seat 33.
C is closer to one of the end faces 33Cd.
Is a small-diameter portion 33Cb 1 of internal diameter corresponding to the outer diameter of the joint pipe 39 connected to cb, the other end face 3 of the valve seat 33C
3Ce inner portion is, there is a large diameter portion 33Cb 2 of larger inner diameter than the outer diameter of the joint pipes 39.
【０１３２】さらに、低圧側ポート３３Ｃｃは、弁座３
３Ｃの一方の端面３３Ｃｄ寄り部分が、低圧側ポート３
３Ｃｃに連結される継手パイプ４１の外径に対応する内
径の大径部３３Ｃｃ1 とされ、弁座３３Ｃの他方の端面
３３Ｃｅ寄り部分が、継手パイプ４１の外径より小さい
内径の小径部３３Ｃｃ2 とされている。Further, the low pressure side port 33Cc is connected to the valve seat 3
The portion near one end face 33Cd of the 3C is the low pressure side port 3
Is a large diameter portion 33 cc 1 inner diameter corresponding to the outer diameter of the joint pipe 41 which is connected to 3 cc, the other end surface 33Ce near portion of the valve seat 33C is small-diameter portion of the smaller inner diameter than the outer diameter of the joint pipe 41 33 cc 2 It has been.
【０１３３】そして、弁座３３Ｃの外周面は、一方の端
面３３Ｃｄ寄りの外周面部分に、弁ハウジング３１Ｃの
内径より若干大きく弁ハウジング３１Ｃの外径より若干
小さい外径で形成された大径部３３Ｃｆと、他方の端面
３３Ｃｅ寄りの外周面部分に、弁ハウジング３１Ｃの内
径に対応する外径で形成された小径部３３Ｃｇとにより
段差状に形成されており、この第４実施形態では、小径
部３３Ｃｇの厚みより大径部３３Ｃｆの厚みの方が若干
大きめに形成されている。[0133] The outer peripheral surface of the valve seat 33C has a large-diameter portion formed on the outer peripheral surface near one end surface 33Cd with an outer diameter slightly larger than the inner diameter of the valve housing 31C and slightly smaller than the outer diameter of the valve housing 31C. 33Cf and a small-diameter portion 33Cg formed on the outer peripheral surface near the other end surface 33Ce with an outer diameter corresponding to the inner diameter of the valve housing 31C. The thickness of the large diameter portion 33Cf is formed slightly larger than the thickness of 33Cg.
【０１３４】尚、図１２中引用符号３１Ｃａは、弁ハウ
ジング３１Ｃの開放端寄りの内周面部分に形成された嵌
合部を示し、この嵌合部３１Ｃａは、弁座３３Ｃの大径
部３３Ｃｆの外径に対応する内径で形成されており、ま
た、嵌合部３１Ｃａは、主弁体３５の回転軸方向におけ
る寸法が、弁座３３Ｃの大径部３３Ｃｆの厚みより若干
小さい寸法で形成されている。The reference numeral 31Ca in FIG. 12 indicates a fitting portion formed on the inner peripheral surface near the open end of the valve housing 31C. The fitting portion 31Ca is a large-diameter portion 33Cf of the valve seat 33C. The fitting portion 31Ca is formed such that the dimension in the rotation axis direction of the main valve body 35 is slightly smaller than the thickness of the large diameter portion 33Cf of the valve seat 33C. ing.
【０１３５】このように構成された弁座３３Ｃの弁ハウ
ジング３１Ｃに対する取り付けは、弁座３３Ｃの小径部
３３Ｃｇを弁ハウジング３１Ｃの開放端から内部に挿入
しつつ、弁座３３Ｃの小径部３３Ｃｇ寄りの大径部３３
Ｃｆ部分を弁ハウジング３１Ｃの嵌合部３１Ｃａに嵌合
して、嵌合部３１Ｃａの内周壁に小径部３３Ｃｇ寄りの
大径部３３Ｃｆ部分の外周面を接合させた状態で、第１
実施形態と同様に、少なくともこれら接合部分の周囲を
不活性ガス雰囲気下におき、レーザ溶接か、或は、非溶
極式アーク溶接によって、弁ハウジング３１Ｃの嵌合部
３１Ｃａと弁座３３Ｃの大径部３３Ｃｆとの接合部分を
溶着することで行う。The thus configured valve seat 33C is attached to the valve housing 31C by inserting the small-diameter portion 33Cg of the valve seat 33C from the open end of the valve housing 31C into the valve housing 31C. Large diameter part 33
The Cf portion is fitted to the fitting portion 31Ca of the valve housing 31C, and the outer peripheral surface of the large-diameter portion 33Cf near the small-diameter portion 33Cg is joined to the inner peripheral wall of the fitting portion 31Ca.
As in the embodiment, at least the periphery of these joints is placed under an inert gas atmosphere, and the size of the fitting portion 31Ca of the valve housing 31C and the size of the valve seat 33C are increased by laser welding or non-welded arc welding. This is performed by welding a joint portion with the diameter portion 33Cf.
【０１３６】このような第４実施形態のロータリ式四方
弁によっても、第１実施形態のロータリ式四方弁と同様
に、溶接する弁座３３Ｃの大径部３３Ｃｆの範囲を小さ
くしても弁座３３Ｃを弁ハウジング３１Ｃに強固に取り
付けることができ、その結果、溶接により溶かされた大
径部３３Ｃｆ部分が冷却固化しても、その際の収縮によ
り弁座３３Ｃが全体的に歪んで平面度が低下し、主弁体
５との間に漏れを生じるような隙間が空くのを防止する
ことができる。With the rotary four-way valve according to the fourth embodiment, similarly to the rotary four-way valve according to the first embodiment, even if the range of the large-diameter portion 33Cf of the valve seat 33C to be welded is reduced, the valve seat is not changed. 33C can be firmly attached to the valve housing 31C. As a result, even if the large diameter portion 33Cf melted by welding is cooled and solidified, the contraction at that time causes the valve seat 33C to be distorted as a whole and the flatness is reduced. It is possible to prevent a gap which lowers and causes a leak between the main valve body 5 and the main valve body 5.
【０１３７】また、第４実施形態のロータリ式四方弁に
よっても、第１実施形態のロータリ式四方弁と同様に、
弁ハウジング３１Ｃの嵌合部３１Ｃａと弁座３３Ｃの大
径部３３Ｃｆとの接合部分を、他の元素との反応を起こ
さず高温が得られるレーザ溶接か非溶極式アーク溶接に
より溶着することから、弁ハウジング３１Ｃが薄肉であ
ったとしても、高い密閉度で耐圧性良く弁座３３Ｃを弁
ハウジング３１Ｃに取り付けることができる。Further, the rotary four-way valve according to the fourth embodiment is also similar to the rotary four-way valve according to the first embodiment.
Since the joining portion between the fitting portion 31Ca of the valve housing 31C and the large diameter portion 33Cf of the valve seat 33C is welded by laser welding or non-welded arc welding, which does not cause a reaction with other elements and can obtain a high temperature. Even if the valve housing 31C is thin, the valve seat 33C can be attached to the valve housing 31C with a high degree of sealing and high pressure resistance.
【０１３８】次に、図１３を参照して本発明の第５実施
形態によるロータリ式四方弁を説明する。図１３は本発
明の第５実施形態によるロータリ式四方弁の要部を断面
で示す説明図であり、第５実施形態のロータリ式四方弁
においては、主弁体３５が第１実施形態のロータリ式四
方弁と同様のものとされている。Next, a rotary four-way valve according to a fifth embodiment of the present invention will be described with reference to FIG. FIG. 13 is an explanatory view showing a cross section of a main part of a rotary type four-way valve according to a fifth embodiment of the present invention. In the rotary type four-way valve according to the fifth embodiment, the main valve body 35 is the rotary type according to the first embodiment. It is the same as the four-way valve.
【０１３９】また、第５実施形態のロータリ式四方弁に
おいては、図１３中引用符号３１Ｄで示す弁ハウジング
が、第３実施形態における弁ハウジング３１Ｂと同様
に、第１実施形態における弁ハウジング３１よりも、主
弁体３５の回転軸方向において若干大きめの寸法に形成
されており、さらに、図１３中引用符号３３Ｄで示す弁
座の構成が、第１実施形態のロータリ式四方弁における
弁座３３とは異なっている。In the rotary four-way valve of the fifth embodiment, the valve housing indicated by reference numeral 31D in FIG. 13 is different from the valve housing 31 of the first embodiment in the same manner as the valve housing 31B of the third embodiment. Are also slightly larger in the direction of the rotation axis of the main valve body 35, and the configuration of the valve seat indicated by reference numeral 33D in FIG. 13 is different from the valve seat 33 in the rotary type four-way valve of the first embodiment. Is different from
【０１４０】そして、第５実施形態のロータリ式四方弁
における弁座３３Ｄは、弁ハウジング３１Ｄの厚みより
大きい厚みで、且つ、弁ハウジング３１Ｄの外径より大
きい外径の円板状を呈しており、この弁座３３Ｄには、
その両端面間を貫通して、回転軸３７が嵌入される回転
軸孔３３Ｄａと、第１及び第２の２つの切換ポート（図
示せず）と、圧縮機の吐出側が接続される高圧側ポート
３３Ｄｂと、圧縮機の吸入側が接続される低圧側ポート
３３Ｄｃとが各々形成されている。The valve seat 33D of the rotary type four-way valve according to the fifth embodiment has a disk shape having a thickness larger than the thickness of the valve housing 31D and an outer diameter larger than the outer diameter of the valve housing 31D. In this valve seat 33D,
A rotating shaft hole 33Da, which penetrates between both end surfaces and into which the rotating shaft 37 is fitted, a first and a second switching port (not shown), and a high-pressure port to which a discharge side of the compressor is connected. 33Db and a low pressure side port 33Dc to which the suction side of the compressor is connected are formed respectively.
【０１４１】このうち、回転軸孔３３Ｄａは、弁座３３
Ｄを弁ハウジング３１Ｄに取り付けた状態で弁ハウジン
グ３１Ｄの外方に露出する弁座３３Ｄの一方の端面３３
Ｄｄ寄り部分が、回転軸孔３３Ｄａに嵌入される回転軸
３７の外径に対応する内径の小径部３３Ｄａ1 とされ、
弁座３３Ｄの他方の端面３３Ｄｅ寄り部分が、回転軸３
７の外径より大きい内径の大径部３３Ｄａ2 とされてい
る。Among them, the rotation shaft hole 33Da is provided with the valve seat 33.
One end face 33 of the valve seat 33D exposed to the outside of the valve housing 31D with D attached to the valve housing 31D.
Dd inner portion is, is a small-diameter portion 33Da 1 of internal diameter corresponding to the outer diameter of the rotary shaft 37 is fitted into the rotation shaft hole 33Da,
The other end face 33De of the valve seat 33D is
7 larger inner diameter than the outer diameter of which is a large diameter portion 33Da 2.
【０１４２】また、高圧側ポート３３Ｄｂは、弁座３３
Ｄの一方の端面３３Ｄｄ寄り部分が、高圧側ポート３３
Ｄｂに連結される継手パイプ３９の外径に対応する内径
の小径部３３Ｄｂ1 とされ、弁座３３Ｄの他方の端面３
３Ｄｅ寄り部分が、継手パイプ３９の外径より大きい内
径の大径部３３Ｄｂ2 とされている。The high pressure side port 33Db is connected to the valve seat 33.
D is closer to one end face 33Dd.
It is a small-diameter portion 33 dB 1 of internal diameter corresponding to the outer diameter of the joint pipe 39 connected to db, the other end face 3 of the valve seat 33D
3De inner portion is, there is a large-diameter portion 33 dB 2 of larger inner diameter than the outer diameter of the joint pipes 39.
【０１４３】さらに、低圧側ポート３３Ｄｃは、弁座３
３Ｄの一方の端面３３Ｄｄ寄り部分が、低圧側ポート３
３Ｄｃに連結される継手パイプ４１の外径に対応する内
径の大径部３３Ｄｃ1 とされ、弁座３３Ｄの他方の端面
３３Ｄｅ寄り部分が、継手パイプ４１の外径より小さい
内径の小径部３３Ｄｃ2 とされている。Further, the low pressure side port 33Dc is connected to the valve seat 3
The portion near one end surface 33Dd of the 3D is the low-pressure side port 3
Is a large diameter portion 33Dc 1 of internal diameter corresponding to the outer diameter of the joint pipe 41 connected to 3Dc, the other end face 33De near portion of the valve seat 33D is small-diameter portion of the smaller inner diameter than the outer diameter of the joint pipe 41 33Dc 2 It has been.
【０１４４】そして、弁座３３Ｄの他方の端面３３Ｄｅ
であって前記各ポート３３Ｄｂ，３３Ｄｃより外周縁寄
りの端面３３Ｄｅ部分には、環状の嵌合溝３３Ｄｆ（環
状溝に相当）が回転軸孔３３Ｄａと同心上に形成されて
いて、この嵌合溝３３Ｄｆの内側壁は、弁ハウジング３
１Ｄの内径より若干小さい外径で形成されており、嵌合
溝３３Ｄｆの外側壁は、弁ハウジング３１Ｄの外径より
若干小さい内径で形成されている。Then, the other end surface 33De of the valve seat 33D is provided.
An annular fitting groove 33Df (corresponding to an annular groove) is formed concentrically with the rotary shaft hole 33Da at an end face 33De closer to the outer peripheral edge than the ports 33Db and 33Dc. The inner wall of 33Df is the valve housing 3
The outer diameter of the fitting groove 33Df is slightly smaller than the outer diameter of the valve housing 31D.
【０１４５】さらに、弁座３３Ｄの他方の端面３３Ｄｅ
には、弁座３３Ｄの角部を斜めに落としたテーパ部３３
Ｄｇが形成されている。Further, the other end surface 33De of the valve seat 33D is provided.
Has a tapered portion 33 in which a corner of the valve seat 33D is obliquely dropped.
Dg is formed.
【０１４６】尚、図１３中引用符号３１Ｄａは、弁ハウ
ジング３１Ｄの開放端寄りの外周面部分に形成された段
差部を示し、この段差部３１Ｄａは、弁座３３Ｃの嵌合
溝３３Ｄｆの外側壁の内径に対応する外径で形成されて
おり、また、段差部３１Ｄａは、主弁体３５の回転軸方
向における寸法が、弁座３３Ｃの嵌合溝３３Ｄｆの深さ
より若干小さい寸法で形成されている。In FIG. 13, reference numeral 31Da denotes a step formed on the outer peripheral surface near the open end of the valve housing 31D. The step 31Da is formed on the outer wall of the fitting groove 33Df of the valve seat 33C. The step portion 31Da is formed such that the dimension in the rotation axis direction of the main valve body 35 is slightly smaller than the depth of the fitting groove 33Df of the valve seat 33C. I have.
【０１４７】このように構成された弁座３３Ｄの弁ハウ
ジング３１Ｄに対する取り付けは、弁座３３Ｄの嵌合溝
３３Ｄｆに弁ハウジング３１Ｃの段差部３１Ｄａを挿入
して、段差部３１Ｄａの外周面を嵌合溝３３Ｄｆの外周
壁に接合させると共に、段差部３１Ｄａの基端側の端面
を、弁座３３Ｄの他方の端面３３Ｄｅであって嵌合溝３
３Ｄｆとテーパ部３３Ｄｇとの間の端面３３Ｄｅ部分に
接合させた状態で、第１実施形態と同様に、少なくとも
これら接合部分の周囲を不活性ガス雰囲気下におき、レ
ーザ溶接か、或は、非溶極式アーク溶接によって、弁ハ
ウジング３１Ｄの段差部３１Ｄａと、弁座３３Ｄの嵌合
溝３３Ｄｆや他方の端面３３Ｄｅとの接合部分を溶着す
ることで行う。The mounting of the valve seat 33D thus configured to the valve housing 31D is performed by inserting the step portion 31Da of the valve housing 31C into the fitting groove 33Df of the valve seat 33D and fitting the outer peripheral surface of the step portion 31Da. The groove 31Df is joined to the outer peripheral wall, and the end face on the base end side of the step portion 31Da is the other end face 33De of the valve seat 33D and the fitting groove 3D.
In a state of being joined to the end face 33De between the 3Df and the tapered portion 33Dg, at least the periphery of these joints is placed under an inert gas atmosphere as in the first embodiment, and laser welding or non-welding is performed. This is performed by welding the joint between the stepped portion 31Da of the valve housing 31D, the fitting groove 33Df of the valve seat 33D and the other end surface 33De by electrode-welded arc welding.
【０１４８】このような第５実施形態のロータリ式四方
弁によっても、第１実施形態のロータリ式四方弁と同様
に、溶接する弁座３３Ｄの嵌合溝３３Ｄｆや他方の端面
３３Ｄｅの範囲を小さくしても弁座３３Ｄを弁ハウジン
グ３１Ｄに強固に取り付けることができ、その結果、溶
接により溶かされた嵌合溝３３Ｄｆ部分や他方の端面３
３Ｄｅ部分が冷却固化しても、その際の収縮により弁座
３３Ｄが全体的に歪んで平面度が低下し、主弁体５との
間に漏れを生じるような隙間が空くのを防止することが
できる。According to the rotary four-way valve of the fifth embodiment, similarly to the rotary four-way valve of the first embodiment, the range of the fitting groove 33Df and the other end surface 33De of the valve seat 33D to be welded is reduced. In this case, the valve seat 33D can be firmly attached to the valve housing 31D. As a result, the fitting groove 33Df and the other end face 3 melted by welding are formed.
Even if the 3De portion is cooled and solidified, the contraction at that time prevents the valve seat 33D from being distorted as a whole, thereby lowering the flatness, and preventing a gap from occurring with the main valve body 5 from leaking. Can be.
【０１４９】また、第５実施形態のロータリ式四方弁に
よっても、第１実施形態のロータリ式四方弁と同様に、
弁ハウジング３１Ｃの段差部３１Ｄａの外周面と弁座３
３Ｄの嵌合溝３３Ｄｆの外周壁との接合部分や、段差部
３１Ｄａの基端側の端面と弁座３３Ｄの他方の端面３３
Ｄｅであって嵌合溝３３Ｄｆとテーパ部３３Ｄｇとの間
の端面３３Ｄｅ部分との接合部分を、他の元素との反応
を起こさず高温が得られるレーザ溶接か非溶極式アーク
溶接により溶着することから、弁ハウジング３１Ｄが薄
肉であったとしても、高い密閉度で耐圧性良く弁座３３
Ｄを弁ハウジング３１Ｄに取り付けることができる。The rotary four-way valve according to the fifth embodiment also has the same structure as the rotary four-way valve according to the first embodiment.
Outer peripheral surface of stepped portion 31Da of valve housing 31C and valve seat 3
A joint portion between the 3D fitting groove 33Df and the outer peripheral wall, an end surface on the base end side of the step portion 31Da and the other end surface 33 of the valve seat 33D.
The welded portion of De and the end face 33De portion between the fitting groove 33Df and the tapered portion 33Dg is welded by laser welding or non-polarized arc welding in which a high temperature is obtained without causing a reaction with other elements. Therefore, even if the valve housing 31D is thin, the valve seat 33 has a high sealing degree and good pressure resistance.
D can be attached to the valve housing 31D.
【０１５０】しかも、第５実施形態のロータリ式四方弁
によれば、弁座３３Ｄの他方の端面３３Ｄｅにテーパ部
３３Ｄｇを形成することから、弁座３３Ｄの嵌合溝３３
Ｄｆに弁ハウジング３１Ｃの段差部３１Ｄａを挿入した
状態で、弁ハウジング３１Ｄのうち段差部３１Ｄａの基
端側の端面と、弁座３３Ｄの他方の端面３３Ｄｅであっ
て嵌合溝３３Ｄｆとテーパ部３３Ｄｇとの間の端面３３
Ｄｅ部分との接合部分が、弁ハウジング３１Ｄの径方向
外方に若干露出することになるため、レーザ溶接か、或
は、非溶極式アーク溶接による溶着作業を、スペースの
面で行い易くすることができる。Further, according to the rotary four-way valve of the fifth embodiment, since the tapered portion 33Dg is formed on the other end surface 33De of the valve seat 33D, the fitting groove 33 of the valve seat 33D is formed.
In the state where the stepped portion 31Da of the valve housing 31C is inserted into Df, the fitting groove 33Df and the tapered portion 33Dg are the end surface of the valve housing 31D on the base end side of the stepped portion 31Da and the other end surface 33De of the valve seat 33D. End face 33 between
Since the joint portion with the De portion is slightly exposed to the outside in the radial direction of the valve housing 31D, the welding operation by laser welding or non-welding type arc welding is easily performed in the space. be able to.
【０１５１】その上、第５実施形態のロータリ式四方弁
によれば、弁座３３Ｄの嵌合溝３３Ｄｆに弁ハウジング
３１Ｃの段差部３１Ｄａを挿入して、段差部３１Ｄａの
外周面と嵌合溝３３Ｄｆの外周壁との接合部分を溶着す
ることから、弁ハウジング３１Ｄの内部の冷媒の圧力が
高くて、弁ハウジング３１Ｄの内周壁に弁ハウジング３
１Ｄの外側へ向かう圧力が作用する場合であっても、段
差部３１Ｄａの外周面に接合する嵌合溝３３Ｄｆの外周
壁によってこの圧力に対抗することができるため、弁ハ
ウジング３１Ｄ自体の肉厚を大きくしなくても、弁ハウ
ジング３１Ｄ内部の冷媒圧力に対する耐圧性を高めるこ
とができる。In addition, according to the rotary four-way valve of the fifth embodiment, the step 31Da of the valve housing 31C is inserted into the fitting groove 33Df of the valve seat 33D, and the outer peripheral surface of the step 31Da is fitted to the fitting groove. Since the joint portion of the valve housing 31D with the outer peripheral wall is welded, the pressure of the refrigerant inside the valve housing 31D is high, and the valve housing 3D is mounted on the inner peripheral wall of the valve housing 31D.
Even when a pressure acting toward the outside of 1D acts, this pressure can be countered by the outer peripheral wall of the fitting groove 33Df joined to the outer peripheral surface of the step portion 31Da, so that the thickness of the valve housing 31D itself is reduced. Even if not increased, the pressure resistance to the refrigerant pressure inside the valve housing 31D can be increased.
【０１５２】尚、嵌合溝３３Ｄｆの外周壁を弁ハウジン
グ３１Ｂの外径に対応する内径で形成し、その代わり
に、弁ハウジング３１Ｂの開放端寄りの外周面部分に形
成した段差部３１Ｄａを省略して、弁座３３Ｄの弁ハウ
ジング３１Ｄに対する取り付けを、弁座３３Ｄの嵌合溝
３３Ｄｆに弁ハウジング３１Ｄの開放端を挿入して、弁
ハウジング３１Ｄの開放端寄りの外周面部分を嵌合溝３
３Ｄｆの外周壁に接合させた状態で、これらの接合部分
を溶着することで行うように構成してもよい。Incidentally, the outer peripheral wall of the fitting groove 33Df is formed with an inner diameter corresponding to the outer diameter of the valve housing 31B, and instead, the step portion 31Da formed on the outer peripheral surface near the open end of the valve housing 31B is omitted. Then, the valve seat 33D is attached to the valve housing 31D by inserting the open end of the valve housing 31D into the fitting groove 33Df of the valve seat 33D and fitting the outer peripheral surface portion near the open end of the valve housing 31D to the fitting groove 3D.
In a state of being joined to the outer peripheral wall of the 3Df, the joining may be performed by welding these joints.
【０１５３】また、図１４に第５実施形態の第１変形例
によるロータリ式四方弁の要部を断面で示す説明図で示
すように、弁ハウジング３１の厚みより僅かに大きい厚
みの円板状を呈する２枚の板材３３Ｄｈ，３３Ｄｊを重
ね合わせて弁座３３Ｄを構成してもよい。Further, as shown in FIG. 14 which is an explanatory view showing a cross section of a main part of a rotary type four-way valve according to a first modification of the fifth embodiment, a disc-like shape having a thickness slightly larger than the thickness of the valve housing 31 is shown. The valve seat 33D may be configured by superposing two plate members 33Dh and 33Dj exhibiting the above.
【０１５４】この場合には、２枚の板材３３Ｄｈ，３３
Ｄｊのうち１枚の板材３３Ｄｈを嵌合溝３３Ｄｆの内側
壁の内径に対応する外径で形成すると共に、もう１枚の
板材３３Ｄｊを弁座３３Ｄの外径より大きい外径で形成
し、板材３３Ｄｊの外周縁部分をプレス深絞り加工等に
より折曲して、弁ハウジング３１Ｄの外径に対応する内
径の円筒部３３Ｄｋ（フランジ部に相当）を形成するこ
とにより、板材３３Ｄｈの外周面と板材３３Ｄｊの円筒
部３３Ｄｋの内周面との間に嵌合溝３３Ｄｆが画成さ
れ、円筒部３３Ｄｋの先端を斜めに落とすことでテーパ
部３３Ｄｇが形成される。In this case, the two plate members 33Dh, 33
Dj, one plate 33Dh is formed with an outer diameter corresponding to the inner diameter of the inner wall of the fitting groove 33Df, and another plate 33Dj is formed with an outer diameter larger than the outer diameter of the valve seat 33D. The outer peripheral edge portion of 33Dj is bent by press deep drawing or the like to form a cylindrical portion 33Dk (corresponding to a flange portion) having an inner diameter corresponding to the outer diameter of the valve housing 31D. A fitting groove 33Df is defined between the cylindrical portion 33Dj and the inner peripheral surface of the cylindrical portion 33Dk, and a tapered portion 33Dg is formed by obliquely dropping the tip of the cylindrical portion 33Dk.
【０１５５】そして、前記板材３３Ｄｈには、その両端
面間を貫通して、回転軸３７が嵌入される回転軸孔３３
Ｄａの大径部３３Ｄａ2 と、第１及び第２の２つの切換
ポート（図示せず）と、圧縮機の吐出側が接続される高
圧側ポート３３Ｄｂの大径部３３Ｄｂ2 と、圧縮機の吸
入側が接続される低圧側ポート３３Ｄｃの小径部３３Ｄ
ｃ2 とが各々形成されている。The plate member 33Dh penetrates between both end faces, and has a rotary shaft hole 33 into which the rotary shaft 37 is inserted.
A large diameter portion 33Da 2 Da, the first and second two switching port (not shown), a large diameter portion 33 dB 2 of the high-pressure port 33 dB where the discharge side of the compressor is connected, the suction of the compressor Small diameter portion 33D of the low pressure side port 33Dc to which the side is connected
c 2 are formed.
【０１５６】また、前記板材３３Ｄｊにも、その両端面
間を貫通して、回転軸３７が嵌入される回転軸孔３３Ｄ
ａの小径部３３Ｄａ1 と、第１及び第２の２つの切換ポ
ート（図示せず）と、圧縮機の吐出側が接続される高圧
側ポート３３Ｄｂの小径部３３Ｄｂ1 と、圧縮機の吸入
側が接続される低圧側ポート３３Ｄｃの大径部３３Ｄｃ
1 とが、板材３３Ｄｈを板材３３Ｄｊに同心上に重ね合
わせた状態で、対応する回転軸孔３３Ｄａの大径部３３
Ｄａ2 や第１及び第２の各切換ポート、高圧側ポート３
３Ｄｂの大径部３３Ｄｂ2 、及び、低圧側ポート３３Ｄ
ｃの小径部３３Ｄｃ2 と同心上に位置するように、各々
形成されている。The plate 33Dj also has a rotating shaft hole 33D through which the rotating shaft 37 is inserted.
a small diameter portion 33Da 1 to a, and the first and second two switching port (not shown), a small-diameter portion 33 dB 1 of the high pressure side port 33 dB where the discharge side of the compressor is connected, the suction side of the compressor is connected Large diameter portion 33Dc of the low pressure side port 33Dc
1 and the large diameter portion 33 of the corresponding rotary shaft hole 33Da in a state where the plate 33Dh is concentrically superimposed on the plate 33Dj.
Da 2 and each of the first and second switching port, the high pressure side port 3
3Db large diameter portion 33Db 2 and low pressure side port 33D
As positioned in the small diameter portion 33Dc 2 concentrically with the c, are respectively formed.
【０１５７】但し、第５実施形態の第１変形例において
は、円筒部３３Ｄｋが弁ハウジング３１Ｄの外径に対応
する内径で形成されていることから、第５実施形態にお
いて弁ハウジング３１Ｄの開放端寄りの外周面部分に形
成していた段差部３１Ｄａは省略される。However, in the first modification of the fifth embodiment, since the cylindrical portion 33Dk is formed with an inner diameter corresponding to the outer diameter of the valve housing 31D, the open end of the valve housing 31D in the fifth embodiment. The step portion 31Da formed on the outer peripheral surface portion is omitted.
【０１５８】従って、第５実施形態の第１変形例におけ
る弁座３３Ｄの弁ハウジング３１Ｄに対する取り付け
は、弁座３３Ｄの嵌合溝３３Ｄｆに弁ハウジング３１Ｄ
の開放端を挿入して、弁ハウジング３１Ｄの開放端寄り
の外周面部分を嵌合溝３３Ｄｆの外周壁に接合させた状
態で、これらの接合部分を溶着することで行われること
になる。Therefore, in the first modification of the fifth embodiment, the valve seat 33D is attached to the valve housing 31D by fitting the valve housing 31D into the fitting groove 33Df of the valve seat 33D.
The welding is performed by welding these joints in a state where the outer peripheral portion near the open end of the valve housing 31D is joined to the outer peripheral wall of the fitting groove 33Df.
【０１５９】このような第５実施形態の第１変形例によ
れば、弁座３３Ｄを構成する２枚の板材３３Ｄｈ，３３
Ｄｊに、回転軸孔３３Ｄａの大径部３３Ｄａ2 と小径部
３３Ｄａ1 、高圧側ポート３３Ｄｂの大径部３３Ｄｂ2
と小径部３３Ｄｂ1 、及び、低圧側ポート３３Ｄｃの小
径部３３Ｄｃ2 と大径部３３Ｄｃ1 を、互いに異なる内
径で各々形成することで、段差を有する孔やポートが弁
座３３Ｄに形成されることになるため、これら段差を有
する孔やポートを容易に、しかも高精度に形成すること
ができる。According to the first modification of the fifth embodiment, the two plate members 33Dh and 33D constituting the valve seat 33D are provided.
To dj, the large diameter portion of the rotary shaft hole 33Da 33Da 2 and the small diameter portion 33Da 1, the large diameter portion of the high pressure side port 33 dB 33 dB 2
By forming the small-diameter portion 33Db 1 and the small-diameter portion 33Dc 2 and the large-diameter portion 33Dc 1 of the low-pressure side port 33Dc with different inner diameters, a hole or port having a step is formed in the valve seat 33D. Therefore, the holes and ports having these steps can be formed easily and with high precision.
【０１６０】また、図１５に第５実施形態の第２変形例
によるロータリ式四方弁の要部を断面で示す説明図で示
すように、弁座３３Ｄを構成する２枚の板材３３Ｄｈ，
３３Ｄｊのうち円筒部３３Ｄｋが一体に形成される板材
３３Ｄｊの厚みを、全体に亘り弁ハウジング３１Ｄの厚
みと同様となる薄肉のものとし、その代わりにもう１枚
の板材３３Ｄｈの厚みを大きくすれば、弁座３３Ｄとし
ての必要な厚みを確保しつつ、板材３３Ｄｊの外周縁部
分を弁ハウジング３１Ｄの外径に対応する内径の環状に
折曲する際のプレス加工等を、薄肉となる分だけ容易に
することができる。As shown in FIG. 15 which is an explanatory view showing a cross section of a main part of a rotary type four-way valve according to a second modification of the fifth embodiment, two plate members 33Dh,
If the thickness of the plate material 33Dj of which the cylindrical portion 33Dk is integrally formed of the 33Dj is made to be the same as the thickness of the valve housing 31D throughout, and instead the thickness of another plate material 33Dh is increased. In addition, pressing while bending the outer peripheral portion of the plate member 33Dj into an annular shape having an inner diameter corresponding to the outer diameter of the valve housing 31D can be performed easily while securing the necessary thickness of the valve seat 33D by the thinner thickness. Can be
【０１６１】さらに、図１５の第２変形例によれば、回
転軸孔３３Ｄａ、高圧側ポート３３Ｄｂ、及び、低圧側
ポート３３Ｄｃに設ける段差のうち一方を他方よりも大
きい寸法とすることができる。Further, according to the second modification shown in FIG. 15, one of the steps provided in the rotary shaft hole 33Da, the high-pressure port 33Db, and the low-pressure port 33Dc can be made larger than the other.
【０１６２】その上、図１５の第２変形例によれば、弁
座３３Ｄを構成する２枚の板材３３Ｄｈ，３３Ｄｊのう
ち板材３３Ｄｊの外周縁部分をプレス深絞り加工等によ
り折曲して、弁ハウジング３１Ｄの外径に対応する内径
の円筒部３３Ｄｋとすることにより、嵌合溝３３Ｄｆが
外周縁部に形成された弁座３３Ｄを、２枚の板材３３Ｄ
ｈ，３３Ｄｊの単なる重ね合わせにより容易に得ること
ができる。In addition, according to the second modified example of FIG. 15, the outer peripheral edge portion of the plate 33Dj of the two plates 33Dh and 33Dj constituting the valve seat 33D is bent by press deep drawing or the like. By forming the cylindrical portion 33Dk having an inner diameter corresponding to the outer diameter of the valve housing 31D, the valve seat 33D in which the fitting groove 33Df is formed on the outer peripheral edge portion is formed by two plate members 33D.
h, 33Dj can be easily obtained by simple superposition.
【０１６３】尚、板材３３Ｄｊの外周縁部分を環状に折
曲する際のプレス加工等を容易にできるようにしたま
ま、図１５に示す寸法比とは逆の寸法比で、回転軸孔３
３Ｄａ、高圧側ポート３３Ｄｂ、及び、低圧側ポート３
３Ｄｃに段差を設けたいのであれば、例えば、図１６に
要部を断面で示す説明図で示す第５実施形態の第３変形
例によるロータリ式四方弁を採用することもできる。It is to be noted that the rotary shaft hole 3 has a size ratio opposite to the size ratio shown in FIG. 15 while facilitating press working when the outer peripheral edge portion of the plate material 33Dj is bent in a ring shape.
3Da, high pressure side port 33Db, and low pressure side port 3
If it is desired to provide a step in 3Dc, for example, a rotary type four-way valve according to a third modified example of the fifth embodiment shown in an explanatory view showing a cross section of a main part in FIG. 16 can be adopted.
【０１６４】即ち、図１６に示すように、板材３３Ｄ
ｈ，３３Ｄｊの間に板材３３Ｄｍを１枚加えて弁座３３
Ｄを３枚の板材３３Ｄｈ，３３Ｄｊ，３３Ｄｍにより構
成し、板材３３Ｄｈ，３３Ｄｊの間に加える板材３３Ｄ
ｍに、板材３３Ｄｊの回転軸孔３３Ｄａの小径部３３Ｄ
ａ1 、高圧側ポート３３Ｄｂの小径部３３Ｄｂ1 、低圧
側ポート３３Ｄｃの大径部３３Ｄｃ1 と各々同じ内径
で、これらの孔やポートを第１及び第２の２つの切換ポ
ート（いずれも符号は省略する）と共に形成すればよ
い。That is, as shown in FIG.
h, 33Dj, one plate 33Dm is added to the valve seat 33.
D is composed of three plate members 33Dh, 33Dj, 33Dm, and is added between the plate members 33Dh, 33Dj.
m, the small diameter portion 33D of the rotation shaft hole 33Da of the plate material 33Dj.
a 1, a small diameter portion 33 dB 1 of the high pressure side port 33 dB, respectively in the same inner diameter as the large diameter portion 33Dc 1 of the low-pressure side port 33Dc, the sign is either of these holes or ports first and second two switching ports ( (Omitted).
【０１６５】そして、図１６の第３変形例によれば、回
転軸孔３３Ｄａ、高圧側ポート３３Ｄｂ、及び、低圧側
ポート３３Ｄｃに各々設ける段差のうち一方を他方より
も大きい寸法とするに当たり、薄肉の２枚の板材３３Ｄ
ｊ，３３Ｄｍに孔やポートを各々同じ内径で形成して重
ねることで、大きい寸法となる孔やポート部分を容易
に、しかも高精度に形成することができる。According to the third modified example shown in FIG. 16, when one of the steps provided in the rotation shaft hole 33Da, the high-pressure port 33Db, and the low-pressure port 33Dc is made larger than the other, a thin wall is required. Of two plates 33D
By forming holes and ports with the same inner diameter on j and 33Dm, respectively, the holes and ports having large dimensions can be formed easily and with high precision.
【０１６６】尚、上述した各実施形態やその変形例のう
ち、第１実施形態、及び、第２実施形態とその各変形例
においては、弁座３３，３３Ａの連結部３３ｇ，３３Ａ
ｊの他端と弁ハウジング３１の開放端とをいずれも平坦
面とし、単に両平坦面を面接合する構成とした。In the first embodiment, the second embodiment, and each of the modifications of the above-described embodiments and the modifications thereof, the connection portions 33g, 33A of the valve seats 33, 33A are provided.
The other end of j and the open end of the valve housing 31 are both flat surfaces, and the two flat surfaces are simply joined to each other.
【０１６７】しかし、例えば、図１７（ａ），（ｂ）に
要部拡大断面図で示すように、弁座３３，３３Ａの連結
部３３ｇ，３３Ａｊの他端と、弁ハウジング３１の開放
端とのうちどちらか一方を段差状に形成し、他方をこの
段差状部分に填め合わせる構成としてもよく、そのよう
に構成すれば、両者の接合部分を溶着する際に、スパッ
タ、即ち、スラグや金属粉が出にくいようにすることが
できる。However, for example, as shown in the enlarged sectional views of the main parts in FIGS. 17A and 17B, the other ends of the connecting portions 33g and 33Aj of the valve seats 33 and 33A and the open end of the valve housing 31 One of them may be formed in a stepped shape, and the other may be fitted into this stepped portion. In such a case, when welding the joint portion of both, spatter, that is, slag or metal Powder can be prevented from coming out.
【０１６８】また、上述した第１実施形態においては、
弁座３３の基板部３３ａを連結部３３ｇに加締め等によ
り固定するものとしたが、弁ハウジング３１に弁座３３
を溶着する前に、後に詳しく説明する本発明の第６実施
形態によるロータリ式四方弁のように、連結部３３ｇに
対する基板部３３ａの固定にろう付け接合を用いるよう
にしてもよい。In the first embodiment described above,
The base portion 33a of the valve seat 33 is fixed to the connecting portion 33g by caulking or the like.
Before welding, the brazing joint may be used for fixing the substrate portion 33a to the connecting portion 33g as in a rotary four-way valve according to a sixth embodiment of the present invention described in detail below.
【０１６９】さらに、第２実施形態とその各変形例にお
いても同様に、弁ハウジング３１に弁座３３Ａを溶着す
る前に、連結部３３Ａｊの他端側から基板部３３Ａａの
外周縁を連結部３３Ａｊの内周面にろう付けすること
で、連結部３３Ａｊに基板部３３Ａａを固定するように
してもよい。Further, in the same manner as in the second embodiment and its modifications, before welding the valve seat 33A to the valve housing 31, the outer peripheral edge of the substrate portion 33Aa is connected to the connecting portion 33Aj from the other end of the connecting portion 33Aj. The board part 33Aa may be fixed to the connecting part 33Aj by brazing to the inner peripheral surface of the substrate 33A.
【０１７０】また、第１実施形態の弁座３３における回
転軸孔３３ｂの大径部３３ｂ2 や高圧側ポート３３ｃの
大径部３３ｃ2 、第２実施形態やその各変形例の弁座３
３Ａにおける板材３３Ａａの回転軸孔３３Ａｂや高圧側
ポート３３Ａｃ、第３実施形態やその各変形例の弁座３
３Ｂにおける板材３３Ｂａの回転軸孔３３Ｂｂや高圧側
ポート３３Ｂｃ、第４実施形態の弁座３３Ｃにおける回
転軸孔３３Ｃｂの大径部３３Ｃｂ2 や高圧側ポート３３
Ｃｃの大径部３３Ｃｃ2 、第５実施形態やその各変形例
の弁座３３Ｄにおける回転軸孔３３Ｄｂの大径部３３Ｄ
ｂ2 や高圧側ポート３３Ｄｃの大径部３３Ｄｃ2 は、い
ずれも、図１８の拡大断面図中に引用符号４３で示すよ
うに、略すり鉢状のテーパ面により形成してもよい。[0170] Further, the large diameter portion 33c 2 of the large-diameter portion 33b 2 and the high pressure side port 33c of the rotary shaft hole 33b in the valve seat 33 of the first embodiment, the valve seat 3 of the second embodiment and modifications thereof
The rotation shaft hole 33Ab and the high pressure side port 33Ac of the plate material 33Aa in 3A, the valve seat 3 of the third embodiment and its modifications.
Of the plate 33Ba in 3B rotary shaft hole 33Bb and the high pressure side port 33Bc, the large diameter portion 33Cb 2 and the high pressure side port 33 of the rotary shaft hole 33Cb in the valve seat 33C of the fourth embodiment
The large diameter portion 33 cc 2 of cc, the large diameter portion of the rotary shaft hole 33Db in the valve seat 33D of the fifth embodiment and its modified examples 33D
b 2 and the large diameter portion of the high pressure side port 33Dc 33Dc 2 are both, as indicated by reference numeral 43 in enlarged cross-sectional view of FIG. 18, it may be formed by a substantially conical tapered surface.
【０１７１】さらに、上述した各実施形態やその変形例
のうち、第２実施形態とその各変形例、第３実施形態と
その各変形例、及び、第５実施形態の各変形例において
は、弁座３３Ａ〜３３Ｄやその基板部３３Ａｋを２枚或
は３枚の板材３３Ａａ，３３Ａｅ，３３Ａｍ，３３Ｂ
ａ，３３Ｂｅ，３３Ｂｍ，３３Ｄｈ，３３Ｄｊ，３３Ｄ
ｍにより構成する場合を例に取って説明したが、弁座や
その基板部を構成する板材の枚数は、複数である限り２
枚或は３枚に限らず任意である。Further, of the above-described embodiments and modifications thereof, the second embodiment and each modification thereof, the third embodiment and each modification thereof, and the modification of the fifth embodiment include: Two or three plate members 33Aa, 33Ae, 33Am, and 33B are provided with the valve seats 33A to 33D and the substrate portion 33Ak.
a, 33Be, 33Bm, 33Dh, 33Dj, 33D
m, the number of plate members constituting the valve seat and its substrate portion is 2 as long as the number is plural.
The number is not limited to three or three.
【０１７２】以上には、弁座３３，３３Ａ，３３Ｂ，３
３Ｃ，３３Ｄを弁ハウジング３１，３１Ｂ，３１Ｄに対
してどのように固定するかを主体とした実施形態を種々
説明したが、続いて、弁座３３Ａ，３３Ｂ，３３Ｄを構
成する複数の板材３３Ａａ，３３Ａｅ，３３Ａｍ、板材
３３Ｂａ，３３Ｂｅ，３３Ｂｍ、板材３３Ｄｈ，Ｄｊ，
Ｄｍの相互間の固定、及び、弁座３３，３３Ａ，３３
Ｂ，３３Ｃ，３３Ｄに対する回転軸３７や継手パイプ３
９，４１の固定をどのようにして行うか、を主体とした
実施形態について説明する。The valve seats 33, 33A, 33B, 3
Although various embodiments mainly describing how to fix the 3C, 33D to the valve housings 31, 31B, 31D have been described, subsequently, the plurality of plate members 33Aa, 33Aa, 33Ae, 33Am, plate members 33Ba, 33Be, 33Bm, plate members 33Dh, Dj,
Dm and the valve seats 33, 33A, 33
Rotating shaft 37 and joint pipe 3 for B, 33C, 33D
An embodiment mainly focusing on how to fix 9, 41 will be described.
【０１７３】図１９は本発明の第６実施形態によるロー
タリ式四方弁の要部を断面で示す説明図で、その部品構
成及び構造自体は、図５を参照して説明した第１実施形
態のロータリ式四方弁と全く同一であり、第１実施形態
のロータリ式四方弁と第６実施形態のロータリ式四方弁
との相違点は、加締め等により行うものとしていた弁座
３３の連結部３３ｇに対する基板部３３ａの固定を、弁
座３３に対する回転軸３７や継手パイプ３９，４１の固
定と共に、ろう付け処理により行うようにした点にあ
る。FIG. 19 is an explanatory view showing a cross section of a main part of a rotary type four-way valve according to a sixth embodiment of the present invention. The parts configuration and the structure itself are the same as those of the first embodiment described with reference to FIG. The difference between the rotary type four-way valve of the first embodiment and the rotary type four-way valve of the sixth embodiment is exactly the same as that of the rotary type four-way valve. Is fixed by the brazing process together with the fixing of the rotating shaft 37 and the joint pipes 39 and 41 to the valve seat 33.
【０１７４】即ち、第６実施形態のロータリ式四方弁で
は、弁座３３を弁ハウジング３１に固定するよりも先
に、基板部３３ａを他方の端面３３ｆ側から連結部３３
ｇの大径部３３ｈに挿入して小径部３３ｊとの段差に突
き当たらせ、この状態で、大径部３３ｈと基板部３３ａ
との間にろうＢｒを行き亘らせ加熱することで、大径部
３３ｈの内周と基板部３３ａの外周とをろう付け接合し
ている。That is, in the rotary type four-way valve according to the sixth embodiment, before the valve seat 33 is fixed to the valve housing 31, the substrate portion 33a is connected to the connecting portion 33 from the other end surface 33f.
g into the large-diameter portion 33h so as to abut against a step between the small-diameter portion 33j and the large-diameter portion 33h and the substrate portion 33a.
By heating the brass Br in between, the inner periphery of the large diameter portion 33h and the outer periphery of the substrate portion 33a are brazed and joined.
【０１７５】また、第６実施形態のロータリ式四方弁で
は、基板部３３ａの回転軸孔３３ｂに回転軸３７を嵌入
すると共に、高圧側ポート３３ｃや低圧側ポート３３ｄ
に継手パイプ３９，４１を各々差し込み、この状態で、
回転軸孔３３ｂと回転軸３７との間、及び、高圧側ポー
ト３３ｃや低圧側ポート３３ｄと継手パイプ３９，４１
との間に各々ろうＢｒを行き亘らせ加熱することで、回
転軸孔３３ｂの内周と回転軸３７の外周、及び、高圧側
ポート３３ｃや低圧側ポート３３ｄの内周と継手パイプ
３９，４１の外周とを、各々ろう付け接合している。In the rotary four-way valve according to the sixth embodiment, the rotary shaft 37 is fitted into the rotary shaft hole 33b of the substrate portion 33a, and the high-pressure side port 33c and the low-pressure side port 33d.
Into the fitting pipes 39 and 41, respectively, and in this state,
Between the rotation shaft hole 33b and the rotation shaft 37, and between the high pressure side port 33c and the low pressure side port 33d and the joint pipes 39 and 41.
Is heated by passing the brass Br in between the inner circumference of the rotary shaft hole 33b and the outer circumference of the rotary shaft 37, and the inner circumferences of the high pressure side port 33c and the low pressure side port 33d and the joint pipe 39, 41 and the outer periphery of each are joined by brazing.
【０１７６】尚、上述したろう付け接合は、内部を還元
気体（Ｈ2 ）の雰囲気とした炉内でいずれも行う。Note that the above-mentioned brazing is performed in a furnace in which the atmosphere is a reducing gas (H 2 ).
【０１７７】このような第６実施形態のロータリ式四方
弁によれば、連結部３３ｇの大径部３３ｈと基板部３３
ａとの固定をろう付け接合により行うことから、連結部
３３ｇや基板部３３ａ自体の溶融を伴わずろうＢｒのみ
の溶融により両者が接合、固定されることになり、した
がって、接合後の冷却固化による収縮に伴う、特に、基
板部３３ａの歪の発生でその平面度が損なわれ、弁体３
５との間に漏れを生じるような隙間が空くのが防がれ
る。According to the rotary four-way valve of the sixth embodiment, the large diameter portion 33h of the connecting portion 33g and the substrate portion 33
is fixed by brazing, the two parts are joined and fixed by melting only the brass Br without melting the connecting part 33g and the substrate part 33a itself. In particular, the flatness of the substrate 33a is impaired by the occurrence of distortion of the substrate 33a due to the contraction caused by
5 is prevented from leaving a gap that may cause leakage.
【０１７８】また、回転軸孔３３ｂに対して回転軸３７
をろう付け接合すると共に、高圧側ポート３３ｃや低圧
側ポート３３ｄに対して継手パイプ３９，４１をろう付
け接合することから、回転軸孔３３ｂの内周と回転軸３
７の外周との間、及び、高圧側ポート３３ｃや低圧側ポ
ート３３ｄの内周と継手パイプ３９，４１の外周との間
に、各々間隙が生じたままとなって、これらの間隙を介
して弁ハウジング３１の内部と外部とが連通し冷媒の漏
出が生じるのが防がれる。The rotation shaft 37 is inserted into the rotation shaft hole 33b.
And the joint pipes 39 and 41 are brazed to the high pressure side port 33c and the low pressure side port 33d, so that the inner circumference of the rotary shaft hole 33b and the rotary shaft 3 are connected.
7, and between the inner periphery of the high-pressure side port 33c and the low-pressure side port 33d and the outer periphery of the joint pipes 39, 41. The inside and outside of the valve housing 31 communicate with each other to prevent leakage of the refrigerant.
【０１７９】したがって、弁座３３に対する弁体３５の
密着度を高く維持すると共に、ロータリ式四方弁の完成
状態において、基板部３３ａと連結部３３ｇとの間に生
じる隙間や、回転軸孔３３ｂと回転軸３７との間に生じ
る隙間、及び、高圧側ポート３３ｃや低圧側ポート３３
ｄと継手パイプ３９，４１との間に生じる隙間を各々介
して、弁ハウジング３１の内部と外部とが連通し、弁ハ
ウジング３１の内部から冷媒が漏出してしまうのを防
ぎ、基板部３３ａと連結部３３ｇとの間における密閉度
を高く維持して、外部に排出される冷媒の圧力低下を確
実に防止することができる。Therefore, the degree of close contact of the valve body 35 with the valve seat 33 is maintained high, and in the completed state of the rotary type four-way valve, a gap formed between the substrate portion 33a and the connecting portion 33g, and a rotation shaft hole 33b are formed. The gap between the rotating shaft 37 and the high-pressure port 33c or the low-pressure port 33
d and the joint pipes 39 and 41, the inside and the outside of the valve housing 31 communicate with each other through the gaps formed between the pipes 39 and 41 to prevent the refrigerant from leaking from the inside of the valve housing 31 and prevent the refrigerant from leaking out from the substrate 33a. It is possible to maintain a high degree of sealing between the connecting portion 33g and the pressure drop of the refrigerant discharged to the outside reliably.
【０１８０】次に、図２０を参照して本発明の第７実施
形態によるロータリ式四方弁を説明する。図２０は本発
明の第７実施形態によるロータリ式四方弁の要部を断面
で示す説明図で、その部品構成及び構造自体は、図６を
参照して説明した第２実施形態のロータリ式四方弁と全
く同一であり、第７実施形態のロータリ式四方弁の特徴
点は、第２実施形態のロータリ式四方弁において詳説し
ていなかった弁座３３Ａの板材３３Ａａ，３３Ａｅ相互
の固定を、弁座３３Ａに対する回転軸３７や継手パイプ
３９，４１の固定と共に、ろう付け処理により行うよう
にした点にある。Next, a rotary four-way valve according to a seventh embodiment of the present invention will be described with reference to FIG. FIG. 20 is an explanatory view showing a cross section of a main part of a rotary type four-way valve according to a seventh embodiment of the present invention. The component configuration and the structure itself are the same as those of the rotary type four-way valve according to the second embodiment described with reference to FIG. The feature of the rotary four-way valve of the seventh embodiment is exactly the same as that of the valve, and the fixing of the plate members 33Aa and 33Ae of the valve seat 33A to each other, which has not been described in detail in the rotary four-way valve of the second embodiment, is explained by using a valve. The point is that the rotation shaft 37 and the joint pipes 39 and 41 are fixed to the seat 33A and brazing is performed.
【０１８１】即ち、第７実施形態のロータリ式四方弁で
は、弁座３３Ａを弁ハウジング３１に固定するよりも先
に、板材３３Ａｅのうち板材３３Ａａと共に基板部３３
Ａｋを構成する板材３３Ａｅ部分の端面と板材３３Ａａ
の端面との間、及び、板材３３Ａｅの環状に折曲された
外周縁部分の内周と板材３３Ａａの外周との間に、ろう
Ｂｒを行き亘らせ加熱することで、板材３３Ａａの端面
と外周とにおいて板材３３Ａｅと板材３３Ａａとをろう
付け接合している。That is, in the rotary type four-way valve of the seventh embodiment, before the valve seat 33A is fixed to the valve housing 31, the board portion 33Ae and the board portion 33Aa of the board material 33Ae are provided.
End face of plate 33Ae constituting Ak and plate 33Aa
Between the end surface of the plate material 33Ae and the inner periphery of the annularly bent outer peripheral edge portion of the plate material 33Ae and the outer periphery of the plate material 33Aa. The plate 33Ae and the plate 33Aa are brazed to the outer periphery.
【０１８２】また、第７実施形態のロータリ式四方弁で
は、板材３３Ａｅの回転軸孔３３Ａｆに回転軸３７を嵌
入すると共に、板材３３Ａｅの高圧側ポート３３Ａｇや
低圧側ポート３３Ａｈに継手パイプ３９，４１を各々差
し込み、この状態で、回転軸孔３３Ａｆと回転軸３７と
の間、及び、高圧側ポート３３Ａｇや低圧側ポート３３
Ａｈと継手パイプ３９，４１との間に各々ろうＢｒを行
き亘らせ加熱することで、回転軸孔３３Ａｆの内周と回
転軸３７の外周、及び、高圧側ポート３３Ａｇや低圧側
ポート３３Ａｈの内周と継手パイプ３９，４１の外周と
を、各々ろう付け接合している。In the rotary type four-way valve according to the seventh embodiment, the rotary shaft 37 is fitted into the rotary shaft hole 33Af of the plate 33Ae, and the connecting pipes 39, 41 are connected to the high-pressure port 33Ag and the low-pressure port 33Ah of the plate 33Ae. In this state, and in this state, between the rotation shaft hole 33Af and the rotation shaft 37, and between the high pressure side port 33Ag and the low pressure side port 33Af.
By heating the braze Br between Ah and the joint pipes 39, 41, the inner circumference of the rotary shaft hole 33Af, the outer circumference of the rotary shaft 37, and the high pressure side port 33Ag and the low pressure side port 33Ah are heated. The inner periphery and the outer periphery of the joint pipes 39 and 41 are brazed and joined respectively.
【０１８３】尚、上述したろう付け接合は、第６実施形
態のロータリ式四方弁の場合と同様に、内部を還元気体
（Ｈ2 ）の雰囲気とした炉内でいずれも行う。The above-mentioned brazing is performed in a furnace in which the atmosphere is a reducing gas (H 2 ) as in the case of the rotary four-way valve of the sixth embodiment.
【０１８４】このような第７実施形態のロータリ式四方
弁によっても、第６実施形態のロータリ式四方弁と同様
に、回転軸孔３３Ａｆに対して回転軸３７をろう付け接
合すると共に、高圧側ポート３３Ａｇや低圧側ポート３
３Ａｈに対して継手パイプ３９，４１をろう付け接合す
ることから、回転軸孔３３Ａｆの内周と回転軸３７の外
周との間、及び、高圧側ポート３３Ａｇや低圧側ポート
３３Ａｈの内周と継手パイプ３９，４１の外周との間
に、各々間隙が生じたままとなって、これらの間隙を介
して弁ハウジング３１の内部と外部とが連通し冷媒の漏
出が生じるのが防がれる。According to the rotary four-way valve of the seventh embodiment, the rotary shaft 37 is brazed to the rotary shaft hole 33Af and the high-pressure side valve is connected, similarly to the rotary four-way valve of the sixth embodiment. Port 33Ag or low pressure side port 3
Since the joint pipes 39 and 41 are brazed to 3Ah, the inner pipe of the rotary shaft hole 33Af and the outer circumference of the rotary shaft 37, and the inner circumference of the high-pressure side port 33Ag and the low-pressure side port 33Ah are connected with the joint pipe. Gaps remain between the outer circumferences of the pipes 39 and 41, and the inside and the outside of the valve housing 31 communicate with each other through these gaps to prevent leakage of the refrigerant.
【０１８５】また、第７実施形態のロータリ式四方弁に
よれば、板材３３Ａｅのうち板材３３Ａａと共に基板部
３３Ａｋを構成する板材３３Ａｅ部分の端面と板材３３
Ａａの端面との間、及び、板材３３Ａｅの環状に折曲さ
れた外周縁部分の内周と板材３３Ａａの外周との間を、
各々ろう付けにより接合することから、板材３３Ａａの
端面や外周において板材３３Ａｅとの間に間隙が生じた
ままとなって、これらの間隙を介して弁ハウジング３１
の内部と外部とが連通し冷媒の漏出が生じるのが防がれ
る。Further, according to the rotary four-way valve of the seventh embodiment, the end face of the plate material 33Ae of the plate material 33Ae and the plate material 33Ae constituting the substrate portion 33Ak together with the plate material 33Ae.
Between the end face of Aa, and between the inner periphery of the annularly bent outer peripheral portion of the plate 33Ae and the outer periphery of the plate 33Aa,
Since each is joined by brazing, a gap is left between the plate 33Ae and the plate 33Ae at the end face or the outer periphery of the plate 33Aa.
The inside and outside communicate with each other to prevent leakage of the refrigerant.
【０１８６】したがって、ロータリ式四方弁の完成状態
において、両板材３３Ａａ，３３Ａｇの間に生じる隙間
や、回転軸孔３３Ａｆと回転軸３７との間に生じる隙
間、及び、高圧側ポート３３Ａｇや低圧側ポート３３Ａ
ｈと継手パイプ３９，４１との間に生じる隙間を介し
て、弁ハウジング３１の内部と外部とが連通し、弁ハウ
ジング３１の内部から冷媒が漏出してしまうのを防ぎ、
これらの部分における密閉度を高く維持して、外部に排
出される冷媒の圧力低下を確実に防止することができ
る。Therefore, in the completed state of the rotary type four-way valve, a gap formed between the two plate members 33Aa and 33Ag, a gap formed between the rotary shaft hole 33Af and the rotary shaft 37, the high pressure side port 33Ag and the low pressure side Port 33A
h and the inside of the valve housing 31 communicate with the outside through a gap generated between the pipes 39 and 41 to prevent the refrigerant from leaking from the inside of the valve housing 31,
By maintaining a high degree of sealing in these portions, it is possible to reliably prevent a pressure drop of the refrigerant discharged to the outside.
【０１８７】尚、図２１に第７実施形態の第１変形例に
よるロータリ式四方弁の要部を断面で示す説明図で示す
ように、図７に示す第２実施形態の第１変形例によるロ
ータリ式四方弁と同じく、板材３３Ａｅの厚みを薄肉と
し、その代わりにもう１枚の板材３３Ａａの厚みを大き
くしたり、図２２に第７実施形態の第２変形例によるロ
ータリ式四方弁の要部を断面で示す説明図で示すよう
に、図８に示す第２実施形態の第２変形例によるロータ
リ式四方弁と同じく、板材３３Ａａ，３３Ａｅの間に板
材３３Ａｍを１枚加えて基板部３３Ａｋを３枚の板材３
３Ａａ，３３Ａｅ，３３Ａｍにより構成する場合に適用
しても、同様の効果を得ることができる。As shown in FIG. 21 which is an explanatory view showing a cross section of a main part of a rotary type four-way valve according to a first modification of the seventh embodiment, the first modification of the second embodiment shown in FIG. Like the rotary four-way valve, the thickness of the plate 33Ae is made thinner, and the thickness of the other plate 33Aa is increased instead. FIG. 22 shows the essentials of the rotary four-way valve according to the second modification of the seventh embodiment. As shown in an explanatory view showing a section in a cross section, as in the rotary type four-way valve according to the second modification of the second embodiment shown in FIG. 8, one board 33Am is added between the board 33Aa and 33Ae to add a board 33Ak. To three plate materials 3
The same effect can be obtained even when applied to the case where it is configured by 3Aa, 33Ae, and 33Am.
【０１８８】但し、図２２の第２変形例によるロータリ
式四方弁の場合には、板材３３Ａａ，３３Ａｍの相互間
と板材３３Ａｍ，３３Ａｅの相互間の各々について、相
互の端面どうしをろう付け接合すると共に、板材３３Ａ
ａ，３３Ａｍの外周を、板材３３Ａｅの環状に折曲され
た外周縁部分の内周に対してろう付け接合することにな
る。However, in the case of the rotary type four-way valve according to the second modification of FIG. 22, the end faces of the plates 33Aa and 33Am and the ends of the plates 33Am and 33Ae are brazed to each other. With the plate 33A
a, 33Am is brazed to the inner periphery of the annularly bent outer peripheral portion of the plate 33Ae.
【０１８９】これにより、ロータリ式四方弁の完成状態
において、両板材３３Ａａ，３３Ａｍの間に生じる隙間
や、両板材３３Ａｍ，３３Ａｅの間に生じる隙間、並び
に、板材３３Ａａ，３３Ａｍと板材３３Ａｅの外周縁部
分との間に生じる隙間を介して、弁ハウジング３１の内
部と外部とが連通し、弁ハウジング３１の内部から冷媒
が漏出してしまうのを防ぎ、これらの部分における密閉
度を高く維持して、外部に排出される冷媒の圧力低下を
確実に防止することができる。Thus, in the completed state of the rotary type four-way valve, a gap formed between the two plate members 33Aa, 33Am, a gap formed between the two plate members 33Am, 33Ae, and an outer peripheral edge of the plate members 33Aa, 33Am and the plate member 33Ae. The inside and the outside of the valve housing 31 communicate with each other through a gap generated between the portions, preventing the refrigerant from leaking from the inside of the valve housing 31 and maintaining a high degree of sealing in these portions. In addition, it is possible to reliably prevent a pressure drop of the refrigerant discharged to the outside.
【０１９０】また、図２３に第７実施形態の第３変形例
によるロータリ式四方弁の要部を断面で示す説明図で示
すように、板材３３Ａａの外径が板材３３Ａｅの環状に
折曲された外周縁部分の内径よりもある程度小さい場合
は、板材３３Ａａの外周と板材３３Ａｅの環状に折曲さ
れた外周縁部分の内周との間のろう付け接合を省略して
も構わない。Further, as shown in FIG. 23, which is an explanatory view showing a cross section of a main part of a rotary type four-way valve according to a third modification of the seventh embodiment, the outer diameter of the plate 33Aa is bent in an annular shape of the plate 33Ae. If it is somewhat smaller than the inner diameter of the outer peripheral edge portion, the brazing joint between the outer periphery of the plate material 33Aa and the inner periphery of the annularly bent outer peripheral portion of the plate material 33Ae may be omitted.
【０１９１】そして、上述した第７実施形態の各変形実
施例によるロータリ式四方弁のろう付け接合は、第７実
施形態によるロータリ式四方弁の場合と同様に、内部を
還元気体（Ｈ2 ）の雰囲気とした炉内でいずれも行う。The rotary brazing of the rotary four-way valve according to each of the modified examples of the seventh embodiment described above is similar to that of the rotary four-way valve according to the seventh embodiment in that the inside of the rotary four-way valve is reduced gas (H 2 ). All are performed in a furnace with the atmosphere described above.
【０１９２】次に、図２４を参照して本発明の第８実施
形態によるロータリ式四方弁を説明する。図２４は本発
明の第８実施形態によるロータリ式四方弁の要部を断面
で示す説明図で、その部品構成及び構造自体は、図９を
参照して説明した第３実施形態のロータリ式四方弁と全
く同一であり、第８実施形態のロータリ式四方弁の特徴
点は、第３実施形態のロータリ式四方弁において詳説し
ていなかった弁座３３Ｂの板材３３Ｂａ，３３Ｂｅ相互
の固定を、弁座３３Ｂに対する回転軸３７や継手パイプ
３９，４１の固定と共に、ろう付け処理により行うよう
にした点にある。Next, a rotary four-way valve according to an eighth embodiment of the present invention will be described with reference to FIG. FIG. 24 is an explanatory view showing a cross section of a main part of a rotary type four-way valve according to an eighth embodiment of the present invention. The component configuration and the structure itself are the same as those of the rotary type four-way valve according to the third embodiment described with reference to FIG. The feature of the rotary type four-way valve of the eighth embodiment is exactly the same as that of the valve, and the fixing of the plate members 33Ba and 33Be of the valve seat 33B to each other, which has not been described in detail in the rotary type four-way valve of the third embodiment, The point is that the rotation shaft 37 and the joint pipes 39 and 41 are fixed to the seat 33B and brazing is performed.
【０１９３】即ち、第８実施形態のロータリ式四方弁で
は、弁座３３Ｂを弁ハウジング３１Ｂに固定するよりも
先に、板材３３Ｂｅの端面と板材３３Ｂａの端面との間
にろうＢｒを行き亘らせ加熱することで、板材３３Ｂａ
と板材３３Ｂｅとをろう付け接合している。That is, in the rotary type four-way valve according to the eighth embodiment, before the valve seat 33B is fixed to the valve housing 31B, the brass Br is spread between the end surface of the plate 33Be and the end of the plate 33Ba. And heating, the plate material 33Ba
And the plate member 33Be are joined by brazing.
【０１９４】また、第８実施形態のロータリ式四方弁で
は、板材３３Ｂｅの回転軸孔３３Ｂｆに回転軸３７を嵌
入すると共に、板材３３Ｂｅの高圧側ポート３３Ｂｇや
低圧側ポート３３Ｂｈに継手パイプ３９，４１を各々差
し込み、この状態で、回転軸孔３３Ｂｆと回転軸３７と
の間、及び、高圧側ポート３３Ｂｇや低圧側ポート３３
Ｂｈと継手パイプ３９，４１との間に各々ろうＢｒを行
き亘らせ加熱することで、回転軸孔３３Ｂｆの内周と回
転軸３７の外周、及び、高圧側ポート３３Ｂｇや低圧側
ポート３３Ｂｈの内周と継手パイプ３９，４１の外周と
を、各々ろう付け接合している。In the rotary type four-way valve of the eighth embodiment, the rotary shaft 37 is fitted into the rotary shaft hole 33Bf of the plate 33Be, and the connecting pipes 39, 41 are connected to the high-pressure port 33Bg and the low-pressure port 33Bh of the plate 33Be. In this state, and in this state, between the rotation shaft hole 33Bf and the rotation shaft 37, and between the high pressure side port 33Bg and the low pressure side port 33Bf.
By heating the brass Br between the Bh and the joint pipes 39 and 41, respectively, the inner circumference of the rotary shaft hole 33Bf and the outer circumference of the rotary shaft 37, and the high pressure side port 33Bg and the low pressure side port 33Bh. The inner periphery and the outer periphery of the joint pipes 39 and 41 are brazed and joined respectively.
【０１９５】尚、上述したろう付け接合は、第６実施形
態や第７実施形態によるロータリ式四方弁の場合と同様
に、内部を還元気体（Ｈ2 ）の雰囲気とした炉内でいず
れも行う。The above-mentioned brazing is performed in a furnace in which the atmosphere is a reducing gas (H 2 ) as in the rotary four-way valve according to the sixth and seventh embodiments. .
【０１９６】このような第８実施形態のロータリ式四方
弁によっても、第６実施形態や第７実施形態のロータリ
式四方弁と同様に、回転軸孔３３Ｂｆに対して回転軸３
７をろう付け接合すると共に、高圧側ポート３３Ｂｇや
低圧側ポート３３Ｂｈに対して継手パイプ３９，４１を
ろう付け接合することから、回転軸孔３３Ｂｆの内周と
回転軸３７の外周との間、及び、高圧側ポート３３Ｂｇ
や低圧側ポート３３Ｂｈの内周と継手パイプ３９，４１
の外周との間に、各々間隙が生じたままとなって、これ
らの間隙を介して弁ハウジング３１Ｂの内部と外部とが
連通し冷媒の漏出が生じるのが防がれる。According to the rotary four-way valve of the eighth embodiment, similarly to the rotary four-way valves of the sixth and seventh embodiments, the rotary shaft hole 33Bf can be used for the rotary shaft 3Bf.
7 and the joint pipes 39 and 41 are brazed to the high-pressure side port 33Bg and the low-pressure side port 33Bh, so that between the inner circumference of the rotary shaft hole 33Bf and the outer circumference of the rotary shaft 37, And high pressure side port 33Bg
And the inner circumference of the low pressure side port 33Bh and the joint pipes 39, 41
Gaps are left between the outer periphery of the valve housing 31B and the inside of the valve housing 31B, and the leakage of the refrigerant is prevented.
【０１９７】また、第８実施形態のロータリ式四方弁に
よれば、板材３３Ｂｅの端面と板材３３Ｂａの端面との
間をろう付けにより接合することから、板材３３Ｂａと
板材３３Ｂｅとの間に間隙が生じたままとなって、これ
らの間隙を介して弁ハウジング３１Ｂの内部と外部とが
連通し冷媒の漏出が生じるのが防がれる。Further, according to the rotary four-way valve of the eighth embodiment, since the end surface of the plate 33Be and the end of the plate 33Ba are joined by brazing, a gap is formed between the plate 33Ba and the plate 33Be. As a result, the inside and outside of the valve housing 31B communicate with each other via these gaps, thereby preventing leakage of the refrigerant.
【０１９８】したがって、ロータリ式四方弁の完成状態
において、両板材３３Ｂａ，３３Ｂｇの間に生じる隙間
や、回転軸孔３３Ｂｆと回転軸３７との間に生じる隙
間、及び、高圧側ポート３３Ｂｇや低圧側ポート３３Ｂ
ｈと継手パイプ３９，４１との間に生じる隙間を介し
て、弁ハウジング３１Ｂの内部と外部とが連通し、弁ハ
ウジング３１Ｂの内部から冷媒が漏出してしまうのを防
ぎ、これらの部分における密閉度を高く維持して、外部
に排出される冷媒の圧力低下を確実に防止することがで
きる。Therefore, in the completed state of the rotary type four-way valve, a gap formed between the two plate members 33Ba and 33Bg, a gap formed between the rotary shaft hole 33Bf and the rotary shaft 37, the high pressure side port 33Bg and the low pressure side Port 33B
h and the inside of the valve housing 31B communicate with each other through a gap formed between the pipes 39 and 41 to prevent the refrigerant from leaking from the inside of the valve housing 31B and to seal these portions. By keeping the degree high, it is possible to reliably prevent the pressure of the refrigerant discharged to the outside from dropping.
【０１９９】尚、図示は省略するものの、弁ハウジング
３１Ｂの厚みと同様の厚みの円板状を呈する２枚の板材
を重ねて板材３３Ｂａを構成して、回転軸孔３３Ｂｂ、
高圧側ポート３３Ｂｃ、及び、低圧側ポート３３Ｂｄに
相当する孔やポートを各板材に各々個別に形成すること
で、板材３３Ｂａよりも薄肉の板材の状態で孔やポート
を容易に形成することができるようにする場合には、板
材３３Ｂａを構成する２枚の板材どうしもろう付けによ
り接合することになる。Although not shown in the figure, a plate 33Ba is formed by laminating two plate-shaped plates having the same thickness as the thickness of the valve housing 31B, thereby forming a rotary shaft hole 33Bb.
By individually forming holes and ports corresponding to the high-pressure side port 33Bc and the low-pressure side port 33Bd in each plate, holes and ports can be easily formed in a state of a thinner plate than the plate 33Ba. In this case, the two plate members constituting the plate member 33Ba are joined by brazing.
【０２００】また、孔やポートを容易に形成できるよう
にしたまま、図２４に示す寸法比とは逆の寸法比で、回
転軸孔３３Ｂｂ，３３Ｂｆ、高圧側ポート３３Ｂｃ，３
３Ｂｇ、及び、低圧側ポート３３Ｂｄ，３３Ｂｈに段差
を設られるようにするために、例えば、図２５に要部を
断面で示す説明図で示す第８実施形態の第１変形例によ
るロータリ式四方弁を採用する場合には、ろう付けは次
のようにして行うことになる。Further, while allowing the holes and ports to be easily formed, the rotary shaft holes 33Bb, 33Bf and the high pressure side ports 33Bc, 3 have a size ratio opposite to the size ratio shown in FIG.
In order to allow a step to be formed in the 3Bg and the low-pressure ports 33Bd and 33Bh, for example, a rotary four-way valve according to a first modification of the eighth embodiment shown in an explanatory view showing a cross section of a main part in FIG. When brazing is adopted, brazing is performed as follows.
【０２０１】即ち、図２５に示すように、板材３３Ｂａ
の厚みを弁ハウジング３１Ｂの厚みと同様の厚みとし、
板材３３Ｂａ，３３Ｂｅの間に板材３３Ｂｍを１枚加え
て弁座３３Ｂを３枚の板材３３Ｂａ，３３Ｂｅ，３３Ｂ
ｍにより構成して、板材３３Ｂａ，３３Ｂｍ間、及び、
板材３３Ｂｍ，３３Ｂｅ間のそれぞれを、ろう付け接合
することになる。That is, as shown in FIG.
Is the same thickness as the thickness of the valve housing 31B,
One plate 33Bm is added between the plates 33Ba, 33Be to make the valve seat 33B three plates 33Ba, 33Be, 33B.
m, between the plate members 33Ba, 33Bm, and
Each of the plate members 33Bm and 33Be is joined by brazing.
【０２０２】このような第８実施形態の第１変形例によ
るロータリ式四方弁によっても、第８実施形態のロータ
リ四方弁と同様の効果を得ることができる。The same effect as the rotary four-way valve according to the eighth embodiment can be obtained by the rotary four-way valve according to the first modification of the eighth embodiment.
【０２０３】さらに、図２６に第８実施形態の第２変形
例によるロータリ式四方弁の要部を断面で示す説明図で
示すように、板材３３Ｂｅの外周縁部分をプレス加工等
により折曲して、弁ハウジング３１Ｂの内径より若干大
きい外径の円筒部３３Ｂｊを形成し、この円筒部３３Ｂ
ｊの先端を残して円筒部３３Ｂｊの基端寄りの外周面部
分を弁ハウジング３１Ｂの内径に対応する外径に切削加
工することで、円筒部３３Ｂｊの先端に、弁ハウジング
３１Ｂの外径より若干小さく弁ハウジング３１Ｂの内径
より若干大きい外径のフランジ部３３Ｂｋ（突出部に相
当）を形成し、このフランジ部３３Ｂｋの外径に合わせ
て、弁ハウジング３１Ｂの開放端寄りの外周面部分をテ
ーパ状に切削加工する構成とする場合にも、ろう付けそ
のものは、図２４に示す第８実施形態のロータリ式四方
弁と同様にして行うことになる。Further, as shown in FIG. 26 which is an explanatory view showing a cross section of a main part of a rotary type four-way valve according to a second modification of the eighth embodiment, the outer peripheral edge portion of a plate 33Be is bent by press working or the like. To form a cylindrical portion 33Bj having an outer diameter slightly larger than the inner diameter of the valve housing 31B.
By cutting the outer peripheral portion near the base end of the cylindrical portion 33Bj to an outer diameter corresponding to the inner diameter of the valve housing 31B while leaving the distal end of j, the distal end of the cylindrical portion 33Bj is slightly smaller than the outer diameter of the valve housing 31B. A flange portion 33Bk (corresponding to a protruding portion) having an outer diameter slightly smaller than the inner diameter of the valve housing 31B is formed, and an outer peripheral portion near the open end of the valve housing 31B is tapered in accordance with the outer diameter of the flange portion 33Bk. Also in the case of a configuration in which cutting is performed, the brazing itself is performed in the same manner as the rotary type four-way valve of the eighth embodiment shown in FIG.
【０２０４】このような第８実施形態の第２変形例によ
るロータリ式四方弁によっても、第８実施形態のロータ
リ四方弁と同様の効果を得ることができる。The same effect as that of the rotary four-way valve according to the eighth embodiment can be obtained by the rotary four-way valve according to the second modification of the eighth embodiment.
【０２０５】そして、上述した第８実施形態の各変形実
施例によるロータリ式四方弁のろう付け接合は、第８実
施形態によるロータリ式四方弁の場合と同様に、内部を
還元気体（Ｈ2 ）の雰囲気とした炉内でいずれも行う。The brazing of the rotary four-way valve according to each modified example of the eighth embodiment described above is similar to the rotary four-way valve according to the eighth embodiment in that the inside of the rotary four-way valve is reduced gas (H 2 ). All are performed in a furnace with the atmosphere described above.
【０２０６】続いて、図２７を参照して本発明の第９実
施形態によるロータリ式四方弁を説明する。Next, a rotary four-way valve according to a ninth embodiment of the present invention will be described with reference to FIG.
【０２０７】図２７は本発明の第９実施形態によるロー
タリ式四方弁の要部を断面で示す説明図で、その部品構
成及び構造自体は、図１４を参照して説明した第５実施
形態の第１変形例によるロータリ式四方弁と全く同一で
あり、第９実施形態のロータリ式四方弁の特徴点は、第
５実施形態の第１変形例のロータリ式四方弁において詳
説していなかった弁座３３Ｄの板材３３Ｄｈ，３３Ｄｊ
相互の固定を、弁座３３Ｄに対する回転軸３７や継手パ
イプ３９，４１の固定と共に、ろう付け処理により行う
ようにした点にある。FIG. 27 is an explanatory view showing a cross section of a main part of a rotary type four-way valve according to a ninth embodiment of the present invention. The parts configuration and the structure itself are the same as those of the fifth embodiment described with reference to FIG. The valve is exactly the same as the rotary four-way valve according to the first modification, and the features of the rotary four-way valve according to the ninth embodiment are not described in detail in the rotary four-way valve according to the first modification of the fifth embodiment. Plate 33Dh, 33Dj of seat 33D
The mutual fixing is performed by brazing together with the fixing of the rotating shaft 37 and the joint pipes 39 and 41 to the valve seat 33D.
【０２０８】即ち、第９実施形態のロータリ式四方弁で
は、弁座３３Ｄを弁ハウジング３１Ｄに固定するよりも
先に、板材３３Ｄｊの端面と板材３３Ｄｈの端面との間
にろうＢｒを行き亘らせ加熱することで、板材３３Ｄｈ
と板材３３Ｄｊとをろう付け接合している。That is, in the rotary type four-way valve according to the ninth embodiment, before the valve seat 33D is fixed to the valve housing 31D, the brass Br is spread between the end surface of the plate 33Dj and the end of the plate 33Dh. The plate material 33Dh
And the plate material 33Dj are joined by brazing.
【０２０９】また、第９実施形態のロータリ式四方弁で
は、板材３３Ｄｋの回転軸孔３３Ｄａ1 に回転軸３７を
嵌入すると共に、板材３３Ｄｋの高圧側ポート３３Ｄｂ
1 や低圧側ポート３３Ｄｃ1 に継手パイプ３９，４１を
各々差し込み、この状態で、回転軸孔３３Ｄａ1 と回転
軸３７との間、及び、高圧側ポート３３Ｄｂ1 や低圧側
ポート３３Ｄｃ1 と継手パイプ３９，４１との間に各々
ろうＢｒを行き亘らせ加熱することで、回転軸孔３３Ｄ
ａ1 の内周と回転軸３７の外周、及び、高圧側ポート３
３Ｄｂ1 や低圧側ポート３３Ｄｃ1 の内周と継手パイプ
３９，４１の外周とを、各々ろう付け接合している。[0209] In the rotary four-way valve of the ninth embodiment, the fitting the rotating shaft 37 to the rotating shaft hole 33Da 1 plate member 33Dk, high-pressure side port 33Db of the plate 33Dk
1 and the low-pressure side port 33Dc 1 , respectively, and in this state, the joint pipes 39 and 41 are inserted between the rotary shaft hole 33Da 1 and the rotary shaft 37, and between the high-pressure side port 33Db 1 and the low-pressure side port 33Dc 1 and the joint pipe. By heating the brass Br in a space between the rotating shaft holes 33D and 39, 41, respectively.
the inner circumference and the outer circumference of the rotating shaft 37 of a 1, and the high-pressure side port 3
The inner periphery of the 3Db 1 or low pressure side port 33Dc 1 and the outer periphery of the joint pipes 39, 41 are brazed and joined respectively.
【０２１０】尚、上述したろう付け接合は、第６乃至第
８実施形態によるロータリ式四方弁の場合と同様に、内
部を還元気体（Ｈ2 ）の雰囲気とした炉内でいずれも行
う。[0210] The above-mentioned brazing is performed in a furnace in which the atmosphere is a reducing gas (H 2 ) as in the case of the rotary four-way valves according to the sixth to eighth embodiments.
【０２１１】このような第９実施形態のロータリ式四方
弁によっても、第６乃至第８実施形態のロータリ式四方
弁と同様に、回転軸孔３３Ｄａ1 に対して回転軸３７を
ろう付け接合すると共に、高圧側ポート３３Ｄｂ1 や低
圧側ポート３３Ｄｃ1 に対して継手パイプ３９，４１を
ろう付け接合することから、回転軸孔３３Ｄａ1 の内周
と回転軸３７の外周との間、及び、高圧側ポート３３Ｄ
ｂ1 や低圧側ポート３３Ｄｃ1 の内周と継手パイプ３
９，４１の外周との間に、各々間隙が生じたままとなっ
て、これらの間隙を介して弁ハウジング３１Ｄの内部と
外部とが連通し冷媒の漏出が生じるのが防がれる。[0211] by rotary four-way valve such ninth embodiment, similarly to the rotary four-way valve of the sixth to eighth embodiments, the rotation shaft 37 brazed to the rotation axis hole 33Da 1 with, between the by brazing the joint pipe 39, 41 with respect to the high pressure side port 33 dB 1 and the low-pressure side port 33Dc 1, the inner periphery of the rotary shaft hole 33Da 1 and the outer periphery of the rotating shaft 37, and a high pressure Side port 33D
b 1 and the inner and joint pipe 3 in the low-pressure port 33Dc 1
Gaps remain between the outer circumferences of the valves 9 and 41, and the inside and the outside of the valve housing 31D communicate with each other through these gaps, thereby preventing leakage of the refrigerant.
【０２１２】また、第９実施形態のロータリ式四方弁に
よれば、板材３３Ｄｈの端面と板材３３Ｄｊの端面との
間をろう付けにより接合することから、板材３３Ｄｈと
板材３３Ｄｊとの間に間隙が生じたままとなって、この
間隙を介して弁ハウジング３１Ｄの内部と外部とが連通
し冷媒の漏出が生じるのが防がれる。According to the rotary type four-way valve of the ninth embodiment, since the end surface of the plate 33Dh and the end surface of the plate 33Dj are joined by brazing, a gap is formed between the plate 33Dh and the plate 33Dj. As a result, the inside and outside of the valve housing 31D communicate with each other through this gap to prevent leakage of the refrigerant.
【０２１３】したがって、ロータリ式四方弁の完成状態
において、両板材３３Ｄｈ，３３Ｄｊの間に生じる隙間
や、回転軸孔３３Ｄａ1 と回転軸３７との間に生じる隙
間、及び、高圧側ポート３３Ｄｂ1 や低圧側ポート３３
Ｄｃ1 と継手パイプ３９，４１との間に生じる隙間を介
して、弁ハウジング３１Ｄの内部と外部とが連通し、弁
ハウジング３１Ｄの内部から冷媒が漏出してしまうのを
防ぎ、これらの部分における密閉度を高く維持して、外
部に排出される冷媒の圧力低下を確実に防止することが
できる。[0213] Therefore, in the finished state of the rotary four-way valve, both plate 33Dh, and gaps formed between the 33Dj, gap formed between the rotary shaft hole 33Da 1 and the rotary shaft 37, and, 33 dB 1 Ya high pressure side port Low pressure side port 33
Through a gap generated between the Dc 1 and the joint pipe 39, 41 communicated with the inside and the outside of the valve housing 31D, it prevents the refrigerant from the interior of the valve housing 31D leaks out, in these parts By maintaining a high degree of sealing, it is possible to reliably prevent a pressure drop of the refrigerant discharged to the outside.
【０２１４】さらに、図２８に第９実施形態の第１変形
例によるロータリ式四方弁の要部を断面で示す説明図で
示すように、図１５に示す第５実施形態の第２変形例に
よるロータリ式四方弁と同じく、板材３３Ｄｊの厚みを
薄肉とし、その代わりにもう１枚の板材３３Ｄｈの厚み
を大きくしたり、図２９に第９実施形態の第２変形例に
よるロータリ式四方弁の要部を断面で示す説明図で示す
ように、図１６に要部を断面で示す示す第５実施形態の
第３変形例によるロータリ式四方弁と同じく、板材３３
Ｄｈ，３３Ｄｊの間に板材３３Ｄｍを１枚加える場合に
適用しても、同様の効果を得ることができる。Further, as shown in FIG. 28, which is an explanatory view showing a cross section of a main part of a rotary type four-way valve according to a first modification of the ninth embodiment, a second modification of the fifth embodiment shown in FIG. As with the rotary four-way valve, the thickness of the plate member 33Dj is made thinner, and the thickness of another plate member 33Dh is increased instead, and FIG. 29 shows the essentials of the rotary four-way valve according to the second modification of the ninth embodiment. As shown in an explanatory view showing a portion in cross section, the plate member 33 is the same as the rotary type four-way valve according to the third modified example of the fifth embodiment in which the main portion is shown in cross section in FIG.
The same effect can be obtained even when applied to the case where one plate 33Dm is added between Dh and 33Dj.
【０２１５】但し、図２９の第２変形例によるロータリ
式四方弁の場合には、板材３３Ｄｈ，３３Ｄｍの相互間
と板材３３Ｄｍ，３３Ｄｊの相互間の各々について、相
互の端面どうしをろう付け接合することになる。However, in the case of the rotary type four-way valve according to the second modified example of FIG. 29, the end faces of the plates 33Dh and 33Dm and the ends of the plates 33Dm and 33Dj are brazed to each other. Will be.
【０２１６】これにより、ロータリ式四方弁の完成状態
において、両板材３３Ｄｈ，３３Ｄｍの間に生じる隙間
や、両板材３３Ｄｍ，３３Ｄｊの間に生じる隙間を介し
て、弁ハウジング３１Ｄの内部と外部とが連通し、弁ハ
ウジング３１Ｄの内部から冷媒が漏出してしまうのを防
ぎ、これらの部分における密閉度を高く維持して、外部
に排出される冷媒の圧力低下を確実に防止することがで
きる。Thus, in the completed state of the rotary type four-way valve, the inside and the outside of the valve housing 31D are separated from each other via the gap generated between the two plates 33Dh and 33Dm and the gap generated between the two plates 33Dm and 33Dj. The communication prevents the refrigerant from leaking from the inside of the valve housing 31D, maintains a high degree of sealing in these portions, and reliably prevents a pressure drop of the refrigerant discharged to the outside.
【０２１７】また、図３０に第９実施形態の第３変形例
によるロータリ式四方弁の要部を断面で示す説明図で示
すように、図１３に要部を断面で示す第５実施形態のロ
ータリ式四方弁と同じく、弁ハウジング３１Ｄの開放端
寄りの外周面部分に段差部３１Ｄａを形成し、これによ
り、板材３３Ｄｋの外周縁部分に折曲形成された円筒部
３３Ｄｋの内周面と板材３３Ｄｈの外周面との間に画成
された嵌合溝３３Ｄｆに、弁ハウジング３１Ｄの開放端
を挿入した状態で、板材３３Ｄｊの円筒部３３Ｄｋの内
周縁部分が弁ハウジング３１Ｄの段差部３１Ｄａに係止
されて、弁ハウジング３１Ｄの開放端が板材３３Ｄｊの
端面から離間するように構成した場合にも、ろう付け接
合する箇所は、図２７に示す第９実施形態のロータリ式
四方弁と同じである。Further, FIG. 30 is an explanatory view showing a main part of a rotary type four-way valve according to a third modification of the ninth embodiment in a cross-sectional view, and FIG. Like the rotary four-way valve, a step portion 31Da is formed on the outer peripheral surface portion near the open end of the valve housing 31D, whereby the inner peripheral surface of the cylindrical portion 33Dk bent at the outer peripheral edge portion of the plate material 33Dk and the plate material are formed. With the open end of the valve housing 31D inserted into the fitting groove 33Df defined between the outer peripheral surface of the valve member 33Dh and the inner peripheral edge of the cylindrical portion 33Dk of the plate 33Dj, the inner peripheral edge of the cylindrical portion 33Dk is engaged with the step 31Da of the valve housing 31D. Even when the valve housing 31D is stopped so that the open end of the valve housing 31D is separated from the end surface of the plate 33Dj, the brazing connection point is the same as that of the rotary four-way valve of the ninth embodiment shown in FIG. .
【０２１８】そして、上述した第９実施形態の各変形実
施例によるロータリ式四方弁のろう付け接合は、第９実
施形態によるロータリ式四方弁の場合と同様に、内部を
還元気体（Ｈ2 ）の雰囲気とした炉内でいずれも行う。[0218] Then, brazing a rotary four-way valve according to the modified example of the ninth embodiment described above, as in the case of rotary four-way valve according to the ninth embodiment, the interior of the reduction gas (H 2) All are performed in a furnace with the atmosphere described above.
【０２１９】尚、上述した各実施形態やその変形例は、
本発明をロータリ式四方弁に適用した場合を例に取って
説明したが、本発明はロータリ式の流路切換弁であれ
ば、四方弁に限らず例えば三方弁等においても同様に適
用可能であることはいうまでもない。Each of the above-described embodiments and its modifications are described in the following.
Although the present invention has been described taking a case where the present invention is applied to a rotary type four-way valve as an example, the present invention is not limited to a four-way valve but may be similarly applied to a three-way valve or the like as long as it is a rotary type flow path switching valve. Needless to say, there is.
【０２２０】[0220]
【発明の効果】以上説明したように請求項１に記載した
本発明のロータリ式流路切換弁によれば、少なくとも一
端が開放された円筒状で薄肉の弁ハウジングに収容され
た弁体を該弁ハウジングの周方向に回転させることで、
前記弁ハウジングの一端を閉塞する弁座に形成された切
換ポートの連通先を、該切換ポートとは独立して前記弁
座に各々形成された高圧側ポート及び低圧側ポートのう
ち一方と他方との間で切り換えるロータリ式流路切換弁
において、前記弁座が、前記切換ポート、前記高圧側ポ
ート、及び、前記低圧側ポートが各々形成された円板状
の基板部と、該基板部の周縁から立設され前記弁ハウジ
ングの内径に対応する内径の円筒状を呈する連結部とを
有しており、前記弁ハウジングの一端と前記連結部の先
端との接合部分が、不活性ガス雰囲気下でのレーザ溶接
と不活性ガス雰囲気下での非溶極式アーク溶接とのうち
いずれか一方により溶着されている構成とした。As described above, according to the rotary type flow path switching valve of the present invention, the valve body accommodated in the cylindrical thin valve housing having at least one open end is provided. By rotating in the circumferential direction of the valve housing,
The communication destination of the switching port formed on the valve seat that closes one end of the valve housing is connected to one and the other of the high-pressure side port and the low-pressure side port respectively formed on the valve seat independently of the switching port. A rotary type flow path switching valve for switching between the valve seat, a disc-shaped substrate portion in which the switching port, the high pressure side port, and the low pressure side port are respectively formed, and a peripheral edge of the substrate portion. And a connecting portion having a cylindrical shape having an inner diameter corresponding to the inner diameter of the valve housing, and a joint portion between one end of the valve housing and a tip of the connecting portion is formed under an inert gas atmosphere. And welding by either one of laser welding and non-welding type arc welding under an inert gas atmosphere.
【０２２１】このため、共に円筒状を呈する弁ハウジン
グの一端と弁座の連結部の先端との接合部分を、他の元
素との反応を起こさず高温が得られるレーザ溶接か非溶
極式アーク溶接により溶着することから、溶接する弁座
の連結部の範囲を小さくしても弁座が弁ハウジングに強
固に取り付けられることになる。For this reason, the joining portion between one end of the valve housing, which is cylindrical in shape, and the tip of the connecting portion of the valve seat is formed by laser welding or a non-welded arc type in which a high temperature is obtained without reacting with other elements. Since the welding is performed by welding, the valve seat is firmly attached to the valve housing even if the range of the connecting portion of the valve seat to be welded is reduced.
【０２２２】その上、溶接により溶かされる連結部の範
囲が小さくなることで、その後に溶かされた連結部部分
が冷却固化しても、その際の収縮により弁座が全体的に
歪んで平面度が低下することがなく、その結果、弁体と
の間に漏れを生じるような隙間の空くのが防止されるこ
とになる。In addition, since the range of the connecting portion melted by welding is reduced, even if the subsequently melted connecting portion is cooled and solidified, the contraction at that time causes the valve seat to be distorted as a whole and the flatness is reduced. Is not reduced, and as a result, it is possible to prevent a gap from being generated between the valve body and the valve body.
【０２２３】しかも、弁ハウジングの一端と弁座の連結
部の先端との接合部分を、他の元素との反応を起こさず
高温が得られるレーザ溶接か非溶極式アーク溶接により
溶着することから、弁座の連結部に接合する弁ハウジン
グ部分が薄肉であったとしても、高い密閉度で弁座が弁
ハウジングに取り付けられることになる。In addition, the joint between the one end of the valve housing and the tip of the connection portion of the valve seat is welded by laser welding or non-welded arc welding, which does not react with other elements and can obtain a high temperature. Even if the valve housing portion joined to the connecting portion of the valve seat is thin, the valve seat is attached to the valve housing with a high degree of sealing.
【０２２４】したがって、弁ハウジングに対する弁座の
取り付け部分における密閉度を高く維持して、弁ハウジ
ングの内部からの流体の漏出を確実に防止することがで
きる。Therefore, it is possible to maintain a high degree of sealing at a portion where the valve seat is attached to the valve housing, and to reliably prevent leakage of fluid from inside the valve housing.
【０２２５】また、請求項２に記載した本発明のロータ
リ式流路切換弁によれば、請求項１に記載したロータリ
式流路切換弁において、前記連結部が、前記先端と基端
との両端が各々開放されており、前記連結部の内周面
に、前記弁ハウジングの内径に対応する内径の小径部
と、前記基板部の外径に対応する内径で前記小径部の内
径より大きい大径部とにより段差が形成されており、前
記基板部が少なくとも前記弁ハウジングの肉厚より大き
い厚みで形成されている構成とした。Further, according to the rotary flow path switching valve of the present invention described in claim 2, in the rotary flow path switching valve described in claim 1, the connecting portion is provided between the distal end and the base end. Both ends are open, and a small-diameter portion having an inner diameter corresponding to the inner diameter of the valve housing, and a larger-diameter portion having an inner diameter corresponding to the outer diameter of the substrate portion and larger than the inner diameter of the small-diameter portion are provided on the inner peripheral surface of the connecting portion. A step is formed by the diameter portion, and the substrate portion is formed to have a thickness larger than at least the thickness of the valve housing.
【０２２６】このため、弁座の基板部を連結部に取り付
ける際には、連結部の大径部に基板部を、小径部との段
差に突き当たるまで挿入し嵌合して、基板部を連結部の
大径部の内周面に取り付けることになるが、基板部が弁
ハウジングの肉厚より大きい厚みで形成されていること
から、基板部と連結部との取り付けには、薄肉の弁ハウ
ジングを対象とする取り付けのような取付手段の制約を
減らし、多種多様の取付手段を用いることができる。For this reason, when attaching the board portion of the valve seat to the connecting portion, the board portion is inserted into the large-diameter portion of the connecting portion until it comes into contact with a step with the small-diameter portion, and is fitted to connect the board portion. The valve section is attached to the inner peripheral surface of the large-diameter section, but since the board section is formed with a thickness larger than the thickness of the valve housing, the thin valve housing is used for attaching the board section and the connecting section. Thus, a variety of attachment means can be used, reducing the restrictions on attachment means, such as attachments intended for.
【０２２７】さらに、請求項３に記載した本発明のロー
タリ式流路切換弁によれば、請求項１に記載したロータ
リ式流路切換弁において、前記基板部が、前記切換ポー
ト、前記高圧側ポート、及び、前記低圧側ポートが各々
形成された円板状の複数の板材を重ね合わせて構成され
ており、これら複数の板材のうち１つの板材と前記連結
部とが一体に形成されている構成とした。Further, according to the rotary flow path switching valve of the present invention described in claim 3, in the rotary flow path switching valve according to claim 1, the substrate portion is provided with the switching port and the high pressure side. The port and the low-pressure side port are each formed by laminating a plurality of disc-shaped plate members, and one of the plate members and the connection portion are integrally formed. The configuration was adopted.
【０２２８】このため、基板部の厚みが増せば増す程、
切換、高圧側、及び、低圧側の各ポートの打ち抜き形成
が難しくなるが、薄肉の板材を複数重ねて基板部を構成
すれば、各板材毎に切換、高圧側、及び、低圧側の各ポ
ートを形成すればよいので、これら各ポートの打ち抜き
形成を容易にすることができる。For this reason, as the thickness of the substrate increases,
Switching, high-pressure side, and punching of each port on the low-pressure side are difficult. However, if a plurality of thin plate materials are stacked to form a board portion, switching is performed for each plate material, and each port on the high-pressure side and the low-pressure side. Can be easily formed by punching out these ports.
【０２２９】しかも、基板部を構成する複数の板材のう
ち１つの板材を、例えば、残る他の板材よりも大径と
し、プレス深絞り加工により周縁部を立ち上げさせて、
連結部が一体に形成されたものとすることで、連結部と
基板部との取り付けを、基板部を構成する複数の板材の
単なる重ね合わせにより容易に実現することができる。Further, one of the plurality of plate members constituting the substrate portion is made larger in diameter than, for example, the remaining plate members, and the peripheral portion is raised by press deep drawing.
Since the connecting portion is formed integrally, attachment of the connecting portion and the substrate portion can be easily realized by simply overlapping a plurality of plate members constituting the substrate portion.
【０２３０】また、請求項４に記載した本発明のロータ
リ式流路切換弁によれば、少なくとも一端が開放された
円筒状で薄肉の弁ハウジングに収容された弁体を該弁ハ
ウジングの周方向に回転させることで、前記弁ハウジン
グの一端を閉塞する弁座に形成された切換ポートの連通
先を、該切換ポートとは独立して前記弁座に各々形成さ
れた高圧側ポート及び低圧側ポートのうち一方と他方と
の間で切り換えるロータリ式流路切換弁において、前記
弁座が、前記切換ポート、前記高圧側ポート、及び、前
記低圧側ポートが各々形成された複数の板材を重ね合わ
せて構成されており、前記複数の板材のうち１つの板材
の周縁に、前記弁座により前記弁ハウジングの一端を閉
塞した状態で前記弁ハウジングの一端寄りの内周面部分
に当接する円筒部と、この円筒部に連設され、前記状態
で前記弁ハウジングの一端から該弁ハウジングの外方に
突出する溶着部とが一体に設けられており、前記弁座に
より前記弁ハウジングの一端を閉塞した状態で、前記１
つの板材の前記溶着部と前記弁ハウジングの一端との接
合部分が、不活性ガス雰囲気下でのレーザ溶接と不活性
ガス雰囲気下での非溶極式アーク溶接とのうちいずれか
一方により溶着されている構成とした。Further, according to the rotary type flow path switching valve of the present invention described in claim 4, the valve body accommodated in the cylindrical thin-walled valve housing having at least one open end is provided in the circumferential direction of the valve housing. The high-pressure side port and the low-pressure side port respectively formed in the valve seat independently of the switching port by connecting the switching destination of the switching port formed in the valve seat that closes one end of the valve housing. In the rotary flow path switching valve that switches between one and the other, the valve seat is formed by stacking a plurality of plate members each formed with the switching port, the high-pressure side port, and the low-pressure side port. A cylindrical portion configured to be in contact with an inner peripheral surface portion near one end of the valve housing in a state where one end of the valve housing is closed by the valve seat on a peripheral edge of one of the plurality of plate materials. And a welding portion which is provided continuously with the cylindrical portion and which protrudes outward from the valve housing from one end of the valve housing in the above state, is provided integrally, and one end of the valve housing is closed by the valve seat. In the state, said 1
A joint portion between the welded portion of the two plate members and one end of the valve housing is welded by one of laser welding under an inert gas atmosphere and non-electrode arc welding under an inert gas atmosphere. Configuration.
【０２３１】このため、円筒状を呈する弁ハウジングの
一端と、弁座のうち弁ハウジングの一端から弁ハウジン
グの外方に突出する溶着部との接合部分を、他の元素と
の反応を起こさず高温が得られるレーザ溶接か非溶極式
アーク溶接により溶着することから、溶接する弁座の溶
着部の範囲を小さくしても弁座が弁ハウジングに強固に
取り付けられることになる。For this reason, the joint between one end of the cylindrical valve housing and the welded portion of the valve seat protruding outward from the valve housing from one end of the valve housing does not react with other elements. Since welding is performed by laser welding or non-welded arc welding that can provide a high temperature, the valve seat can be firmly attached to the valve housing even if the welded area of the valve seat to be welded is reduced.
【０２３２】その上、溶接により溶かされる溶着部の範
囲が小さくなることで、その後に溶かされた溶着部部分
が冷却固化しても、その際の収縮により弁座が全体的に
歪んで平面度が低下することがなく、その結果、弁体と
の間に漏れを生じるような隙間の空くのが防止されるこ
とになる。In addition, since the range of the welded portion melted by welding is reduced, even if the welded portion subsequently melted is solidified by cooling, the shrinkage at that time causes the entire valve seat to be distorted and the flatness to be reduced. Is not reduced, and as a result, it is possible to prevent a gap from being generated between the valve body and the valve body.
【０２３３】しかも、弁ハウジングの一端と弁座の溶着
部との接合部分を、他の元素との反応を起こさず高温が
得られるレーザ溶接か非溶極式アーク溶接により溶着す
ることから、弁座の溶着部に接合する弁ハウジング部分
が薄肉であったとしても、高い密閉度で弁座が弁ハウジ
ングに取り付けられることになる。In addition, the joint between the one end of the valve housing and the welded portion of the valve seat is welded by laser welding or non-welded arc welding in which a high temperature is obtained without causing a reaction with other elements. Even if the valve housing portion joined to the welded portion of the seat is thin, the valve seat is attached to the valve housing with a high degree of sealing.
【０２３４】したがって、弁ハウジングに対する弁座の
取り付け部分における密閉度を高く維持して、弁ハウジ
ングの内部からの流体の漏出を確実に防止することがで
きる。Therefore, it is possible to maintain a high degree of sealing at the portion where the valve seat is attached to the valve housing, and to reliably prevent leakage of fluid from inside the valve housing.
【０２３５】さらに、請求項５に記載した本発明のロー
タリ式流路切換弁によれば、少なくとも一端が開放され
た円筒状で薄肉の弁ハウジングに収容された弁体を該弁
ハウジングの周方向に回転させることで、前記弁ハウジ
ングの一端を閉塞する円板状の弁座に形成された切換ポ
ートの連通先を、該切換ポートとは独立して前記弁座に
各々形成された高圧側ポート及び低圧側ポートのうち一
方と他方との間で切り換えるロータリ式流路切換弁にお
いて、前記弁ハウジングの一端寄りの内周面部分に、該
弁ハウジングの内径より大きい内径の嵌合部が形成され
ており、前記弁座の周縁部が、前記嵌合部の内径に対応
する外径の大径部と、該大径部の外径より小さい外径で
前記弁ハウジングの内部に挿入可能な外径の小径部とに
より段差状に形成されており、前記小径部を前記弁ハウ
ジングの内部に挿入させつつ前記弁座を前記嵌合部に嵌
合した状態で、前記弁ハウジングの前記嵌合部と前記弁
座の前記大径部との接合箇所が、不活性ガス雰囲気下で
のレーザ溶接と不活性ガス雰囲気下での非溶極式アーク
溶接とのうちいずれか一方により溶着されている構成と
した。Further, according to the rotary flow path switching valve of the present invention, the valve body accommodated in the cylindrical thin-walled valve housing having at least one end opened is provided in the circumferential direction of the valve housing. , The communication destination of the switching port formed in the disc-shaped valve seat that closes one end of the valve housing is changed to the high pressure side port formed in the valve seat independently of the switching port. And a rotary flow path switching valve for switching between one and the other of the low pressure side ports, wherein a fitting portion having an inner diameter larger than the inner diameter of the valve housing is formed on an inner peripheral surface portion near one end of the valve housing. A peripheral portion of the valve seat has a large-diameter portion having an outer diameter corresponding to the inner diameter of the fitting portion, and an outer diameter which is smaller than the outer diameter of the large-diameter portion and which can be inserted into the valve housing. Formed as a step with small diameter part In the state where the valve seat is fitted to the fitting portion while the small-diameter portion is inserted inside the valve housing, the fitting portion of the valve housing and the large-diameter portion of the valve seat are Is welded by one of laser welding in an inert gas atmosphere and non-welded electrode arc welding in an inert gas atmosphere.
【０２３６】このため、円筒状を呈する弁ハウジングの
一端寄りの内周面部分に形成された嵌合部と、弁座の周
縁部のうち大径部との接合部分を、他の元素との反応を
起こさず高温が得られるレーザ溶接か非溶極式アーク溶
接により溶着することから、溶接する弁座の周縁部のう
ち大径部の範囲を小さくしても弁座が弁ハウジングに強
固に取り付けられることになる。For this reason, the fitting portion formed on the inner peripheral surface portion near one end of the cylindrical valve housing and the joining portion between the large-diameter portion of the peripheral portion of the valve seat are connected to other elements. Since welding is performed by laser welding or non-fused arc welding, which can produce high temperatures without causing a reaction, the valve seat is firmly attached to the valve housing even if the area of the large diameter part of the peripheral edge of the valve seat to be welded is reduced. Will be attached.
【０２３７】その上、溶接により溶かされる大径部の範
囲が小さくなることで、その後に溶かされた大径部部分
が冷却固化しても、その際の収縮により弁座が全体的に
歪んで平面度が低下することがなく、その結果、弁体と
の間に漏れを生じるような隙間の空くのが防止されるこ
とになる。In addition, since the range of the large-diameter portion melted by welding is reduced, even if the large-diameter portion subsequently melted is solidified by cooling, the valve seat is distorted as a whole due to shrinkage at that time. The flatness is not reduced, and as a result, a gap that causes leakage between the valve body and the valve body is prevented.
【０２３８】しかも、弁ハウジングの一端と弁座の周縁
部のうち大径部との接合部分を、他の元素との反応を起
こさず高温が得られるレーザ溶接か非溶極式アーク溶接
により溶着することから、弁ハウジングの一端が薄肉で
あったとしても、高い密閉度で弁座が弁ハウジングに取
り付けられることになる。できる。Further, the joining portion between one end of the valve housing and the large-diameter portion of the peripheral portion of the valve seat is welded by laser welding or non-welded arc welding in which a high temperature is obtained without causing a reaction with other elements. Accordingly, even if one end of the valve housing is thin, the valve seat is attached to the valve housing with a high degree of sealing. it can.
【０２３９】したがって、弁ハウジングに対する弁座の
取り付け部分における密閉度を高く維持して、弁ハウジ
ングの内部からの流体の漏出を確実に防止することが可
能となる。Therefore, it is possible to maintain a high degree of sealing at the portion where the valve seat is attached to the valve housing, and to reliably prevent leakage of fluid from inside the valve housing.
【０２４０】また、請求項６に記載した本発明のロータ
リ式流路切換弁によれば、少なくとも一端が開放された
円筒状で薄肉の弁ハウジングに収容された弁体を該弁ハ
ウジングの周方向に回転させることで、前記弁ハウジン
グの一端を閉塞する円板状の弁座に形成された切換ポー
トの連通先を、該切換ポートとは独立して前記弁座に各
々形成された高圧側ポート及び低圧側ポートのうち一方
と他方との間で切り換えるロータリ式流路切換弁におい
て、前記弁座の周縁部に、前記弁ハウジングの一端が挿
入可能な環状溝が形成されており、前記環状溝に前記弁
ハウジングの一端を挿入した状態で、該弁ハウジングの
一端寄りの外周面部分と前記環状溝との接合箇所が、不
活性ガス雰囲気下でのレーザ溶接と不活性ガス雰囲気下
での非溶極式アーク溶接とのうちいずれか一方により溶
着されている構成とした。According to the rotary type flow path switching valve of the present invention, the valve body accommodated in the cylindrical thin-walled valve housing having at least one open end is provided in the circumferential direction of the valve housing. , The communication destination of the switching port formed in the disc-shaped valve seat that closes one end of the valve housing is changed to the high pressure side port formed in the valve seat independently of the switching port. And a rotary flow passage switching valve that switches between one and the other of the low pressure side ports, wherein an annular groove into which one end of the valve housing can be inserted is formed in a peripheral portion of the valve seat, When one end of the valve housing is inserted into the valve housing, the joint between the outer peripheral surface portion near the one end of the valve housing and the annular groove is formed by laser welding under an inert gas atmosphere and non-welding under an inert gas atmosphere. Electrode type It has a configuration which is welded by either one of the welding.
【０２４１】このため、弁座の周縁部に形成された環状
溝に、円筒状を呈する弁ハウジングの一端を挿入した状
態で、弁ハウジングの一端寄りの外周面部分と環状溝と
の接合箇所を、他の元素との反応を起こさず高温が得ら
れるレーザ溶接か非溶極式アーク溶接により溶着するこ
とから、溶接する弁座の環状溝の範囲を小さくしても弁
座が弁ハウジングに強固に取り付けられることになる。For this reason, in a state where one end of the cylindrical valve housing is inserted into the annular groove formed in the peripheral portion of the valve seat, the joint between the outer peripheral surface portion near one end of the valve housing and the annular groove is formed. Since welding is performed by laser welding or non-welded arc welding, which can produce high temperatures without causing reactions with other elements, the valve seat is firmly attached to the valve housing even if the range of the annular groove of the valve seat to be welded is reduced. Will be attached to
【０２４２】その上、溶接により溶かされる環状溝の範
囲が小さくなることで、その後に溶かされた環状溝部分
が冷却固化しても、その際の収縮により弁座が全体的に
歪んで平面度が低下し、弁体との間に漏れを生じるよう
な隙間の空くのが防止されることになる。In addition, since the range of the annular groove melted by welding is reduced, even if the subsequently melted annular groove portion is cooled and solidified, the valve seat is entirely distorted due to shrinkage at that time, and the flatness is reduced. Is reduced, and it is possible to prevent a gap from being generated between the valve body and the valve body.
【０２４３】しかも、弁ハウジングの一端寄りの外周面
部分と弁座の環状溝との接合部分を、他の元素との反応
を起こさず高温が得られるレーザ溶接か非溶極式アーク
溶接により溶着することから、弁座の環状溝に接合する
弁ハウジング部分が薄肉であったとしても、高い密閉度
で弁座が弁ハウジングに取り付けられることになる。In addition, the joining portion between the outer peripheral surface portion near one end of the valve housing and the annular groove of the valve seat is welded by laser welding or non-welding type arc welding which can obtain a high temperature without reacting with other elements. Therefore, even if the valve housing portion joined to the annular groove of the valve seat is thin, the valve seat is attached to the valve housing with a high degree of sealing.
【０２４４】したがって、弁ハウジングに対する弁座の
取り付け部分における密閉度を高く維持して、弁ハウジ
ングの内部からの流体の漏出を確実に防止することがで
きる。Therefore, it is possible to maintain a high degree of sealing at the portion where the valve seat is attached to the valve housing, and to reliably prevent leakage of fluid from inside the valve housing.
【０２４５】さらに、請求項７に記載した本発明のロー
タリ式流路切換弁によれば、請求項６に記載したロータ
リ式流路切換弁において、前記弁ハウジングの一端寄り
の外周面部分に、該弁ハウジングの一端を前記環状溝に
挿入した状態で該環状溝の外縁部分と係合可能な段差部
が形成されており、該段差部と前記環状溝の外縁部分と
の接合部分が、不活性ガス雰囲気下でのレーザ溶接と不
活性ガス雰囲気下での非溶極式アーク溶接とのうちいず
れか一方によりさらに溶着されている構成とした。Further, according to the rotary flow path switching valve of the present invention described in claim 7, in the rotary flow path switching valve according to claim 6, the outer peripheral surface portion near one end of the valve housing is provided with: A step is formed which is engageable with an outer edge of the annular groove with one end of the valve housing inserted into the annular groove, and a joint between the step and the outer edge of the annular groove is not formed. The welding was further performed by one of laser welding in an active gas atmosphere and non-polarized arc welding in an inert gas atmosphere.
【０２４６】このため、弁ハウジングの一端を弁座の環
状溝に挿入すると、弁ハウジングの一端寄りの外周面部
分が環状溝と接合するだけでなく、弁ハウジングの一端
寄りの外周面部分に形成した段差部が環状溝の外縁部分
と接合するので、不活性ガス雰囲気の下でレーザ溶接か
非溶極式アーク溶接により溶着する領域を広げ、弁ハウ
ジングに対する弁座の取付をより強固にすることができ
ると共に、弁ハウジングの段差部が接合する弁座の環状
溝の外縁部分により弁ハウジングの内圧に対抗して、耐
圧性を向上させることができる。For this reason, when one end of the valve housing is inserted into the annular groove of the valve seat, not only the outer peripheral surface portion near one end of the valve housing is joined to the annular groove, but also the outer peripheral surface portion near one end of the valve housing is formed. Because the stepped portion joins the outer edge of the annular groove, the area to be welded by laser welding or non-welded arc welding under an inert gas atmosphere is expanded, and the mounting of the valve seat to the valve housing is made more robust. In addition, the pressure resistance can be improved against the internal pressure of the valve housing by the outer edge of the annular groove of the valve seat to which the stepped portion of the valve housing is joined.
【０２４７】また、請求項８に記載した本発明のロータ
リ式流路切換弁によれば、請求項７に記載したロータリ
式流路切換弁において、前記弁座が、前記切換ポート、
前記高圧側ポート、及び、前記低圧側ポートが各々形成
された円板状の複数の板材を重ね合わせて構成されてお
り、これら複数の板材のうち一部の板材が、前記弁ハウ
ジングの内部に挿入可能な外径で形成されており、前記
複数の板材のうち前記一部の板材を除く他の一部の板材
の周縁部に、前記一部の板材の外側に延出する環状のフ
ランジ部が連設されており、該フランジ部が前記弁ハウ
ジングの外径に対応する内径で形成されており、前記フ
ランジ部と前記他の一部の板材の周縁部との間に前記環
状溝が画成されている構成とした。According to the rotary flow path switching valve of the present invention described in claim 8, in the rotary flow path switching valve according to claim 7, the valve seat includes the switching port,
The high-pressure side port, and the low-pressure side port is configured by laminating a plurality of disk-shaped plate material each formed, and some of the plurality of plate materials, inside the valve housing. An annular flange portion formed at an outer diameter capable of being inserted, and extending around the periphery of some of the plurality of plate materials other than the some of the plate materials, and extending outside the some of the plate materials. The flange portion is formed with an inner diameter corresponding to the outer diameter of the valve housing, and the annular groove is defined between the flange portion and the peripheral edge portion of the other part of the plate material. The configuration has been adopted.
【０２４８】このため、弁座を構成する複数の板材のう
ち一部の板材を、例えば、残る他の一部の板材よりも大
径とし、プレス深絞り加工により周縁部を立ち上げさせ
て、フランジ部が一体に形成されたものとすることで、
環状溝が周縁部に形成された弁座を複数の板材の単なる
重ね合わせにより容易に得ることができる。For this reason, of the plurality of plate members constituting the valve seat, some of the plate members are made larger in diameter than, for example, the remaining other plate members, and the peripheral portion is raised by press deep drawing. By making the flange part integrally formed,
A valve seat in which an annular groove is formed on a peripheral portion can be easily obtained by simply overlapping a plurality of plate members.
【０２４９】さらに、請求項９に記載した本発明のロー
タリ式流路切換弁によれば、請求項３、４又は８に記載
したロータリ式流路切換弁において、前記複数の板材に
おける対応する前記各ポートの打ち抜き径が相互に異な
り、当該打ち抜き径の相違により、前記各ポートに継手
パイプ差し込み用の段差が形成されている構成とした。Further, according to the rotary flow path switching valve of the present invention described in claim 9, in the rotary flow path switching valve described in claim 3, 4, or 8, the corresponding one of the plurality of plate members is provided. The punching diameters of the ports are different from each other, and a step for inserting a joint pipe is formed in each port due to the difference in the punching diameters.
【０２５０】このため、切換、高圧側、及び、低圧側の
各ポートに対する継手パイプの差し込み寸法を規定する
ための段差を、例えば、互いに径の異なる同心円上の孔
を弁座の両面から弁座よりも小さい厚みで各々形成して
相互に連通させるよりも、簡単に且つ高精度に形成する
ことができる。For this reason, a step for defining the insertion dimension of the joint pipe with respect to each of the switching, high pressure side and low pressure side ports, for example, a hole on a concentric circle having a different diameter from each other is formed from both sides of the valve seat. Rather than forming each with a smaller thickness and communicating with each other, they can be formed easily and with high precision.
【０２５１】また、請求項１０に記載した本発明のロー
タリ式流路切換弁によれば、少なくとも一端が開放され
た円筒状で薄肉の弁ハウジングに収容された弁体を該弁
ハウジングの周方向に回転させることで、前記弁ハウジ
ングの一端を閉塞する弁座に形成された切換ポートの連
通先を、該切換ポートとは独立して前記弁座に各々形成
された高圧側ポート及び低圧側ポートのうち一方と他方
との間で切り換えるロータリ式流路切換弁において、前
記弁座が、前記切換ポート、前記高圧側ポート、及び、
前記低圧側ポートが各々形成された円板状の基板部と、
該基板部の周縁から立設され前記弁ハウジングの前記一
端に連結される円筒状の連結部とを有しており、前記基
板部の外周と前記連結部の内周とがろう付け処理により
接合されている構成とした。According to the rotary flow switching valve of the present invention, the valve body accommodated in the cylindrical thin-walled valve housing having at least one open end is provided in the circumferential direction of the valve housing. The high-pressure side port and the low-pressure side port respectively formed in the valve seat independently of the switching port by connecting the switching destination of the switching port formed in the valve seat that closes one end of the valve housing. In a rotary flow path switching valve that switches between one and the other, the valve seat includes the switching port, the high-pressure port, and
A disk-shaped substrate portion on which each of the low-pressure ports is formed;
A cylindrical connecting portion that stands upright from a peripheral edge of the substrate portion and is connected to the one end of the valve housing; an outer periphery of the substrate portion and an inner periphery of the connecting portion are joined by a brazing process; Configuration.
【０２５２】このため、弁座を構成する基板部の外周と
連結部の内周との間における隙間の発生がろう付け接合
により防止されることになり、しかも、ろう付けによる
ことから基板部及び連結部自身はいずれも溶融されない
ことから、接合後の冷却固化による収縮に伴う特に基板
部の歪の発生でその平面度が損なわれることもない。For this reason, the formation of a gap between the outer periphery of the substrate portion constituting the valve seat and the inner periphery of the connecting portion is prevented by brazing, and furthermore, the substrate portion and Since none of the connecting portions themselves are melted, the flatness thereof is not impaired due to the occurrence of distortion of the substrate portion due to shrinkage due to cooling and solidification after joining.
【０２５３】したがって、弁座に対する弁体の密着度を
高く維持すると共に、ロータリ式流路切換弁の完成状態
において基板部の外周と連結部の内周との間に生じる隙
間を介して、弁ハウジングの内部と外部とが連通して、
弁ハウジングの内部から流体が漏出してしまうのを防
ぎ、基板部と連結部との間における密閉度を高く維持し
て、外部に排出される流体の圧力低下を確実に防止する
ことができる。Therefore, the degree of close contact of the valve body with the valve seat is maintained high, and the valve is formed through a gap formed between the outer periphery of the substrate portion and the inner periphery of the connection portion in the completed state of the rotary flow path switching valve. The inside and outside of the housing communicate with each other,
It is possible to prevent the fluid from leaking from the inside of the valve housing, to maintain a high degree of sealing between the substrate portion and the connecting portion, and to surely prevent a pressure drop of the fluid discharged to the outside.
【０２５４】さらに、請求項１１に記載した本発明のロ
ータリ式流路切換弁によれば、少なくとも一端が開放さ
れた円筒状で薄肉の弁ハウジングに収容された弁体を該
弁ハウジングの周方向に回転させることで、前記弁ハウ
ジングの一端を閉塞する弁座に形成された切換ポートの
連通先を、該切換ポートとは独立して前記弁座に各々形
成された高圧側ポート及び低圧側ポートのうち一方と他
方との間で切り換えるロータリ式流路切換弁において、
前記弁座が、前記切換ポート、前記高圧側ポート、及
び、前記低圧側ポートが各々形成された複数の板材を重
ね合わせて構成されており、前記複数の板材を重ね合わ
せた状態で、隣り合う各板材の相互間がろう付け処理に
より接合されている構成とした。Further, according to the rotary flow path switching valve of the present invention described in claim 11, the valve body accommodated in the cylindrical thin-walled valve housing having at least one end opened is provided in the circumferential direction of the valve housing. The high-pressure side port and the low-pressure side port respectively formed in the valve seat independently of the switching port by connecting the switching destination of the switching port formed in the valve seat that closes one end of the valve housing. A rotary flow path switching valve that switches between one and the other,
The valve seat is configured by stacking a plurality of plate members on which the switching port, the high-pressure side port, and the low-pressure side port are respectively formed, and adjacent to each other in a state where the plurality of plate members are stacked. The respective plates were joined together by brazing.
【０２５５】このため、弁座を構成する複数の板材の相
互間における隙間の発生がろう付け接合により防止され
ることになり、その結果、ロータリ式流路切換弁の完成
状態において弁ハウジングと弁座との間に生じる隙間や
各ポートを介して、弁ハウジングの内部と外部とが連通
してしまうのを防ぎ、各板材の相互間における密閉度を
高く維持して、外部に排出される流体の圧力低下を確実
に防止することが可能となる。For this reason, the formation of a gap between the plurality of plate members constituting the valve seat is prevented by brazing, and as a result, the valve housing and the valve are completed in the completed state of the rotary type flow switching valve. Prevents the inside and outside of the valve housing from communicating with each other through the gaps and ports created between the seats, and maintains a high degree of sealing between the respective plate members so that the fluid discharged to the outside Pressure drop can be reliably prevented.
【０２５６】また、請求項１２に記載した本発明のロー
タリ式流路切換弁によれば、請求項１１に記載した本発
明のロータリ式流路切換弁において、前記ろう付け処理
が、前記各板材の相互間に間隙を設けた状況下でなされ
た構成とした。According to the rotary flow path switching valve of the present invention described in claim 12, in the rotary flow path switching valve of the present invention described in claim 11, the brazing process is performed by using each of the plate members. The configuration was made under the condition that a gap was provided between the two.
【０２５７】このため、各板材の相互間に設けた間隙に
よりその間隙に充填されるろうに毛細管現象を働かせ
て、各板材の接合面の全体にろうを広く行き亘らせ、こ
れにより、各板材どうしのろう付け接合を確実なものと
することができる。[0257] Therefore, the gap provided between the respective plate materials causes the wax filling the gap to cause capillary action to spread the wax widely over the entire joint surface of the respective plate materials. Can be securely connected.
【０２５８】さらに、請求項１３に記載した本発明のロ
ータリ式流路切換弁によれば、請求項１１又は１２に記
載したロータリ式流路切換弁において、前記弁座が、前
記切換ポート、前記高圧側ポート、及び、前記低圧側ポ
ートが各々形成された円板状の基板部と、該基板部の周
縁から立設され前記弁ハウジングの前記一端に連結され
る円筒状の連結部とを有しており、前記基板部の外周と
前記連結部の内周とがろう付け処理により接合されてい
る構成とした。Further, according to the rotary flow path switching valve of the present invention described in claim 13, in the rotary flow path switching valve according to claim 11 or 12, the valve seat comprises the switching port, A high-pressure port and a low-pressure port, each of which has a disk-shaped substrate portion, and a cylindrical connection portion that stands upright from the periphery of the substrate portion and that is connected to the one end of the valve housing. The outer periphery of the substrate portion and the inner periphery of the connecting portion are joined by a brazing process.
【０２５９】このため、弁座を構成する円板状の基板部
の外周と円筒状の連結部の内周との間における隙間の発
生が、ろう付け接合により防止されることになり、その
結果、ロータリ式流路切換弁の完成状態において弁ハウ
ジングの内部と外部とが連通して、弁ハウジングの内部
から流体が漏出してしまうのを、弁ハウジングと弁座と
の間において防いで、外部に排出される流体の圧力低下
をより一層確実に防止することができる。For this reason, the formation of a gap between the outer periphery of the disk-shaped substrate portion constituting the valve seat and the inner periphery of the cylindrical connecting portion is prevented by brazing, and as a result, In the completed state of the rotary flow path switching valve, the inside and outside of the valve housing communicate with each other to prevent fluid from leaking from the inside of the valve housing between the valve housing and the valve seat. The pressure drop of the fluid discharged to the nozzle can be more reliably prevented.
【０２６０】また、請求項１４に記載した本発明のロー
タリ式流路切換弁によれば、請求項１１又は１２に記載
したロータリ式流路切換弁において、前記複数の板材の
うち１つの板材の周縁に、前記弁座により前記弁ハウジ
ングの一端を閉塞した状態で前記弁ハウジングの一端寄
りの内周面部分に当接する円筒部と、この円筒部に連設
され、前記状態で前記弁ハウジングの一端から該弁ハウ
ジングの外方に突出する突出部とが一体に設けられてお
り、前記状態で前記円筒部の外周と前記弁ハウジングの
内周との間に生じる間隙に、前記複数の板材の相互間を
接合させるろうが充填され、該充填されたろうを用いた
ろう付け処理により、前記状態で前記円筒部の外周と前
記弁ハウジングの内周とが接合されている構成とした。According to the rotary flow path switching valve of the present invention described in claim 14, in the rotary flow path switching valve described in claim 11 or 12, the one of the plurality of plate materials is used. A peripheral portion, a cylindrical portion abutting on an inner peripheral surface portion near one end of the valve housing in a state where one end of the valve housing is closed by the valve seat, and a cylindrical portion connected to the cylindrical portion; A protruding portion that protrudes outward from the valve housing from one end is provided integrally, and in the gap generated between the outer periphery of the cylindrical portion and the inner periphery of the valve housing in the above state, the plurality of plate members A configuration is adopted in which the brazing to be joined to each other is filled, and the outer periphery of the cylindrical portion and the inner periphery of the valve housing are joined in this state by the brazing process using the filled brazing.
【０２６１】このため、弁座により弁ハウジングの一端
を閉塞した状態で、弁座を構成する複数の板材のうち１
つの板材の周縁に連設される円筒部と、この円筒部が当
接する弁ハウジングの一端寄りの内周面部分との間に生
じる間隙に充填されたろうにより、円筒部の外周と弁ハ
ウジングの内周とがろう付け接合されることになる。For this reason, with one end of the valve housing closed by the valve seat, one of a plurality of plate members constituting the valve seat is used.
The gap formed between the cylindrical portion connected to the peripheral edge of the two plate members and the inner peripheral surface portion near one end of the valve housing with which the cylindrical portion comes into contact is filled with the wax, so that the outer periphery of the cylindrical portion and the inside of the valve housing are filled. The periphery is to be brazed.
【０２６２】したがって、ロータリ式流路切換弁の完成
状態において弁ハウジングの内部と外部とが連通して、
弁ハウジングの内部から流体が漏出してしまうのを、１
つの板材の円筒部の外周と弁ハウジングの内周との間に
おいて防いで、外部に排出される流体の圧力低下をより
一層確実に防止することができる。Therefore, in the completed state of the rotary type flow path switching valve, the inside and outside of the valve housing communicate with each other,
Leakage of fluid from inside the valve housing
By preventing between the outer periphery of the cylindrical portion of the two plate members and the inner periphery of the valve housing, the pressure drop of the fluid discharged to the outside can be more reliably prevented.
【０２６３】さらに、請求項１５に記載した本発明のロ
ータリ式流路切換弁によれば、請求項１０、１１、１
２、１３又は１４に記載したロータリ式流路切換弁にお
いて、前記ポートに継手パイプが差し込まれ、該継手パ
イプの外周と前記ポートの内周と前記がろう付け処理に
より接合されている構成とした。Further, according to the rotary type flow path switching valve of the present invention described in claim 15, claims 10, 11, 1
In the rotary flow path switching valve described in 2, 13, or 14, a joint pipe is inserted into the port, and the outer periphery of the joint pipe and the inner periphery of the port are joined by brazing. .
【０２６４】このため、弁座のポートの内周と、このポ
ートに差し込まれる継手パイプの外周とがろう付け接合
されることから、ロータリ式流路切換弁の完成状態にお
いて弁ハウジングの内部と外部とが連通して、弁ハウジ
ングの内部から流体が漏出してしまうのを、弁座を貫通
するポートの内周と継手パイプの外周との間において防
いで、外部に排出される流体の圧力低下をより一層確実
に防止することができる。For this reason, since the inner periphery of the port of the valve seat and the outer periphery of the joint pipe inserted into this port are brazed, the inside and outside of the valve housing are completed in the completed state of the rotary type flow switching valve. To prevent the fluid from leaking from the inside of the valve housing between the inner circumference of the port penetrating the valve seat and the outer circumference of the joint pipe, thereby lowering the pressure of the fluid discharged to the outside. Can be more reliably prevented.
【０２６５】また、請求項１６に記載した本発明のロー
タリ式流路切換弁によれば、請求項１０、１１、１２、
１３、１４又は１５に記載したロータリ式流路切換弁に
おいて、前記弁座の中心部に貫通孔が形成されていて、
該貫通孔に前記弁体の回転中心をなす軸部材が挿通され
ており、該軸部材の外周と前記貫通孔の内周とがろう付
け処理により接合されている構成とした。According to the rotary type flow path switching valve of the present invention described in claim 16, claims 10, 11, 12,
13. The rotary flow path switching valve according to 13, 14, or 15, wherein a through hole is formed in a center portion of the valve seat,
A shaft member serving as a rotation center of the valve body is inserted into the through hole, and an outer periphery of the shaft member and an inner periphery of the through hole are joined by a brazing process.
【０２６６】このため、弁座の中心部に形成された貫通
孔の内周と、この貫通孔に挿通されて弁体の回転中心を
なす軸部材の外周とがろう付け接合されることから、ロ
ータリ式流路切換弁の完成状態において弁ハウジングの
内部と外部とが連通して、弁ハウジングの内部から流体
が漏出してしまうのを、弁座を貫通する貫通孔の内周と
軸部材の外周との間において防いで、外部に排出される
流体の圧力低下をより一層確実に防止することができ
る。For this reason, since the inner periphery of the through hole formed in the center of the valve seat and the outer periphery of the shaft member inserted into the through hole and forming the rotation center of the valve body are brazed, In the completed state of the rotary flow path switching valve, the inside and outside of the valve housing communicate with each other, and the leakage of fluid from the inside of the valve housing is caused by the inner circumference of the through hole passing through the valve seat and the shaft member. By preventing the fluid between the outer periphery and the outer periphery, the pressure drop of the fluid discharged to the outside can be more reliably prevented.
【０２６７】さらに、請求項１７に記載した本発明のロ
ータリ式流路切換弁によれば、請求項１０、１１、１
２、１３、１４、１５又は１６に記載したロータリ式流
路切換弁において、前記ろう付け処理が還元ガス雰囲気
下でなされている構成とした。Further, according to the rotary type flow path switching valve of the present invention described in claim 17, claims 10, 11, 1
In the rotary flow path switching valve described in 2, 13, 14, 15, or 16, the brazing treatment is performed in a reducing gas atmosphere.
【０２６８】このため、ろう付け処理を還元ガス雰囲気
下で行うことにより、ろう付け後の弁座が酸化膜で被覆
されるのを防ぎ、これに伴い、以後のろう付けの前にそ
の都度酸洗い等による弁座からの酸化膜の除去作業が必
要となるのを防止することができる。For this reason, by performing the brazing treatment in a reducing gas atmosphere, the valve seat after brazing is prevented from being covered with an oxide film. It is possible to prevent the need to remove the oxide film from the valve seat by washing or the like.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明が適用されるロータリ式四方弁の一般的
な概略構成を示す断面図である。FIG. 1 is a sectional view showing a general schematic configuration of a rotary four-way valve to which the present invention is applied.
【図２】図１の弁座の底面図である。FIG. 2 is a bottom view of the valve seat of FIG. 1;
【図３】図１のロータリ式四方弁を用いた冷媒回路の説
明図である。FIG. 3 is an explanatory diagram of a refrigerant circuit using the rotary four-way valve of FIG. 1;
【図４】図１のロータリ式四方弁を用いた冷媒回路の説
明図である。FIG. 4 is an explanatory diagram of a refrigerant circuit using the rotary four-way valve of FIG. 1;
【図５】本発明の第１実施形態によるロータリ四方弁の
要部を断面で示す説明図である。FIG. 5 is an explanatory view showing a cross section of a main part of the rotary four-way valve according to the first embodiment of the present invention.
【図６】本発明の第２実施形態によるロータリ四方弁の
要部を断面で示す説明図である。FIG. 6 is an explanatory view showing a cross section of a main part of a rotary four-way valve according to a second embodiment of the present invention.
【図７】本発明の第２実施形態の第１変形例によるロー
タリ四方弁の要部を断面で示す説明図である。FIG. 7 is an explanatory view showing a cross section of a main part of a rotary four-way valve according to a first modification of the second embodiment of the present invention.
【図８】本発明の第２実施形態の第２変形例によるロー
タリ四方弁の要部を断面で示す説明図である。FIG. 8 is an explanatory diagram showing a cross section of a main part of a rotary four-way valve according to a second modification of the second embodiment of the present invention.
【図９】本発明の第３実施形態によるロータリ四方弁の
要部を断面で示す説明図である。FIG. 9 is an explanatory view showing a cross section of a main part of a rotary four-way valve according to a third embodiment of the present invention.
【図１０】本発明の第３実施形態の第１変形例によるロ
ータリ四方弁の要部を断面で示す説明図である。FIG. 10 is an explanatory diagram showing a cross section of a main part of a rotary four-way valve according to a first modification of the third embodiment of the present invention.
【図１１】本発明の第３実施形態の第２変形例によるロ
ータリ四方弁の要部を断面で示す説明図である。FIG. 11 is an explanatory diagram showing a cross section of a main part of a rotary four-way valve according to a second modification of the third embodiment of the present invention.
【図１２】本発明の第４実施形態によるロータリ四方弁
の要部を断面で示す説明図である。FIG. 12 is an explanatory view showing a cross section of a main part of a rotary four-way valve according to a fourth embodiment of the present invention.
【図１３】本発明の第５実施形態によるロータリ四方弁
の要部を断面で示す説明図である。FIG. 13 is an explanatory diagram showing a cross section of a main part of a rotary four-way valve according to a fifth embodiment of the present invention.
【図１４】本発明の第５実施形態の第１変形例によるロ
ータリ四方弁の要部を断面で示す説明図である。FIG. 14 is an explanatory diagram showing a cross section of a main part of a rotary four-way valve according to a first modification of the fifth embodiment of the present invention.
【図１５】本発明の第５実施形態の第２変形例によるロ
ータリ四方弁の要部を断面で示す説明図である。FIG. 15 is an explanatory view showing a cross section of a main part of a rotary four-way valve according to a second modification of the fifth embodiment of the present invention.
【図１６】本発明の第５実施形態の第３変形例によるロ
ータリ四方弁の要部を断面で示す説明図である。FIG. 16 is an explanatory diagram showing a cross section of a main part of a rotary four-way valve according to a third modification of the fifth embodiment of the present invention.
【図１７】（ａ），（ｂ）は図５乃至図８の弁ハウジン
グの開放端と弁座の連結部の他端との接合構造の変形例
を各々示す要部拡大断面図である。FIGS. 17 (a) and (b) are enlarged cross-sectional views of essential parts showing modified examples of the joint structure between the open end of the valve housing and the other end of the connection portion of the valve seat in FIGS. 5 to 8, respectively.
【図１８】図５乃至図１６の弁座の回転軸孔や高圧側ポ
ートの断面形状の変形例を示す拡大断面図である。FIG. 18 is an enlarged cross-sectional view showing a modification of the cross-sectional shape of the rotary shaft hole and the high-pressure side port of the valve seat in FIGS.
【図１９】本発明の第６実施形態によるロータリ式四方
弁の要部を断面で示す説明図である。FIG. 19 is an explanatory view showing in cross section a main part of a rotary four-way valve according to a sixth embodiment of the present invention.
【図２０】本発明の第７実施形態によるロータリ式四方
弁の要部を断面で示す説明図である。FIG. 20 is an explanatory diagram showing a cross section of a main part of a rotary four-way valve according to a seventh embodiment of the present invention.
【図２１】本発明の第７実施形態の第１変形例によるロ
ータリ式四方弁の要部を断面で示す説明図である。FIG. 21 is an explanatory view showing a cross section of a main part of a rotary four-way valve according to a first modification of the seventh embodiment of the present invention.
【図２２】本発明の第７実施形態の第２変形例によるロ
ータリ式四方弁の要部を断面で示す説明図である。FIG. 22 is an explanatory view showing a cross section of a main part of a rotary four-way valve according to a second modification of the seventh embodiment of the present invention.
【図２３】本発明の第７実施形態の第３変形例によるロ
ータリ式四方弁の要部を断面で示す説明図である。FIG. 23 is an explanatory diagram showing a cross section of a main part of a rotary four-way valve according to a third modification of the seventh embodiment of the present invention.
【図２４】本発明の第８実施形態によるロータリ式四方
弁の要部を断面で示す説明図である。FIG. 24 is an explanatory diagram showing a cross section of a main part of a rotary four-way valve according to an eighth embodiment of the present invention.
【図２５】本発明の第８実施形態の第１変形例によるロ
ータリ式四方弁の要部を断面で示す説明図である。FIG. 25 is an explanatory diagram showing a cross section of a main part of a rotary four-way valve according to a first modification of the eighth embodiment of the present invention.
【図２６】本発明の第８実施形態の第２変形例によるロ
ータリ式四方弁の要部を断面で示す説明図である。FIG. 26 is an explanatory view showing a cross section of a main part of a rotary four-way valve according to a second modification of the eighth embodiment of the present invention.
【図２７】本発明の第９実施形態によるロータリ式四方
弁の要部を断面で示す説明図である。FIG. 27 is an explanatory view showing in cross section a main part of a rotary four-way valve according to a ninth embodiment of the present invention.
【図２８】本発明の第９実施形態の第１変形例によるロ
ータリ式四方弁の要部を断面で示す説明図である。FIG. 28 is an explanatory diagram showing a cross section of a main part of a rotary four-way valve according to a first modification of the ninth embodiment of the present invention.
【図２９】本発明の第９実施形態の第２変形例によるロ
ータリ式四方弁の要部を断面で示す説明図である。FIG. 29 is an explanatory view showing a cross section of a main part of a rotary four-way valve according to a second modification of the ninth embodiment of the present invention.
【図３０】本発明の第９実施形態の第３変形例によるロ
ータリ式四方弁の要部を断面で示す説明図である。FIG. 30 is an explanatory diagram showing a cross section of a main part of a rotary four-way valve according to a third modification of the ninth embodiment of the present invention.
３１，３１Ｂ，３１Ｃ，３１Ｄ 弁ハウジング ３１Ｃａ 嵌合部 ３１Ｄａ 段差部（弁ハウジング外周面段差部） ３３，３３Ａ，３３Ｂ，３３Ｃ，３３Ｄ 弁座 ３３ａ，３３Ａｋ 基板部 ３３ｇ，３３Ａｊ 連結部 ３３ｈ 連結部内周面大径部 ３３Ａａ，３３Ａｅ，３３Ａｍ，３３Ｂａ，３３Ｂｅ，
３３Ｂｍ，３３Ｄｈ，３３Ｄｊ，３３Ｄｍ 板材 ３３Ａｃ，３３Ａｇ 高圧側ポート ３３Ａｄ，３３Ａｈ 低圧側ポート ３３Ｂｊ 円筒部 ３３Ｂｋ フランジ部（溶着部） ３３Ｃｆ 弁座大径部 ３３Ｃｇ 弁座小径部 ３３Ｄｆ 嵌合溝（環状溝） ３３Ｄｋ 円筒部（フランジ部、突出部） ３５ 主弁体（弁体）31, 31B, 31C, 31D Valve housing 31Ca Fitting part 31Da Step part (valve housing outer peripheral surface step part) 33, 33A, 33B, 33C, 33D Valve seat 33a, 33Ak Board part 33g, 33Aj Connecting part 33h Connecting part inner peripheral surface Large diameter part 33Aa, 33Ae, 33Am, 33Ba, 33Be,
33Bm, 33Dh, 33Dj, 33Dm Plate 33Ac, 33Ag High pressure side port 33Ad, 33Ah Low pressure side port 33Bj Cylindrical part 33Bk Flange part (welded part) 33Cf Valve seat large diameter part 33Cg Valve seat small diameter part 33Df Fitting groove (annular groove) 33Dk Cylindrical part (flange part, protruding part) 35 Main valve body (valve body)
───────────────────────────────────────────────────── フロントページの続き (72)発明者 野田 光昭 埼玉県狭山市笹井535 株式会社鷺宮製作 所狭山事業所内 (72)発明者 相原 一登 埼玉県狭山市笹井535 株式会社鷺宮製作 所狭山事業所内 (72)発明者 中川 昇 埼玉県狭山市笹井535 株式会社鷺宮製作 所狭山事業所内 (72)発明者 鈴木 和重 埼玉県狭山市笹井535 株式会社鷺宮製作 所狭山事業所内 (72)発明者 寺西 敏博 埼玉県狭山市笹井535 株式会社鷺宮製作 所狭山事業所内 (72)発明者 金崎 文雄 埼玉県狭山市笹井535 株式会社鷺宮製作 所狭山事業所内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Mitsuaki Noda 535 Sasai, Sayama-shi, Saitama Prefecture Sagimiya Manufacturing Co., Ltd. (72) Inventor Noboru Nakagawa 535 Sasai, Sayama City, Saitama Prefecture Sagimiya Manufacturing Co., Ltd., Sayama Plant 535 Sasai, Sayama-shi, Saitama Prefecture Sagimiya Manufacturing Co., Ltd.Sayama Plant (72) Inventor Fumio Kanazaki, 535 Sasai City, Sayama-shi, Saitama Prefecture Sagimiya Manufacturing Co., Ltd.
Claims (17)
肉の弁ハウジングに収容された弁体を該弁ハウジングの
周方向に回転させることで、前記弁ハウジングの一端を
閉塞する弁座に形成された切換ポートの連通先を、該切
換ポートとは独立して前記弁座に各々形成された高圧側
ポート及び低圧側ポートのうち一方と他方との間で切り
換えるロータリ式流路切換弁において、 前記弁座は、前記切換ポート、前記高圧側ポート、及
び、前記低圧側ポートが各々形成された円板状の基板部
と、該基板部の周縁から立設され前記弁ハウジングの内
径に対応する内径の円筒状を呈する連結部とを有してお
り、 前記弁ハウジングの一端と前記連結部の先端との接合部
分が、不活性ガス雰囲気下でのレーザ溶接と不活性ガス
雰囲気下での非溶極式アーク溶接とのうちいずれか一方
により溶着されている、 ことを特徴とするロータリ式流路切換弁。1. A valve seat that closes one end of the valve housing by rotating a valve body accommodated in a thin cylindrical valve housing having at least one end opened in a circumferential direction of the valve housing. A rotary type flow path switching valve for switching the communication destination of the switching port between one and the other of the high pressure side port and the low pressure side port formed on the valve seat independently of the switching port. The valve seat has a disc-shaped substrate portion on which the switching port, the high-pressure side port, and the low-pressure side port are formed, and an inner diameter corresponding to the inner diameter of the valve housing, which is erected from the periphery of the substrate portion. And a joining portion between one end of the valve housing and a tip of the connecting portion is formed by laser welding under an inert gas atmosphere and non-melting under an inert gas atmosphere. Polar arc melting Rotary channel selector valve, characterized in that, being welded by either one of the.
が各々開放されており、前記連結部の内周面には、前記
弁ハウジングの内径に対応する内径の小径部と、前記基
板部の外径に対応する内径で前記小径部の内径より大き
い大径部とにより段差が形成されており、前記基板部は
少なくとも前記弁ハウジングの肉厚より大きい厚みで形
成されている請求項１記載のロータリ式流路切換弁。2. The connecting portion, wherein both ends of the distal end and the base end are open, and a small-diameter portion having an inner diameter corresponding to the inner diameter of the valve housing is provided on an inner peripheral surface of the connecting portion. A step is formed by an inner diameter corresponding to an outer diameter of the substrate portion and a large-diameter portion larger than the inner diameter of the small-diameter portion, and the substrate portion is formed to have a thickness at least larger than a thickness of the valve housing. 2. The rotary flow path switching valve according to 1.
圧側ポート、及び、前記低圧側ポートが各々形成された
円板状の複数の板材を重ね合わせて構成されており、こ
れら複数の板材のうち１つの板材と前記連結部とが一体
に形成されている請求項１記載のロータリ式流路切換
弁。3. The substrate section is formed by laminating a plurality of disk-shaped plate members on which the switching port, the high-pressure side port, and the low-pressure side port are formed, respectively. 2. The rotary flow path switching valve according to claim 1, wherein one of the plate members and the connecting portion are integrally formed.
肉の弁ハウジングに収容された弁体を該弁ハウジングの
周方向に回転させることで、前記弁ハウジングの一端を
閉塞する弁座に形成された切換ポートの連通先を、該切
換ポートとは独立して前記弁座に各々形成された高圧側
ポート及び低圧側ポートのうち一方と他方との間で切り
換えるロータリ式流路切換弁において、 前記弁座は、前記切換ポート、前記高圧側ポート、及
び、前記低圧側ポートが各々形成された複数の板材を重
ね合わせて構成されており、 前記複数の板材のうち１つの板材の周縁には、前記弁座
により前記弁ハウジングの一端を閉塞した状態で前記弁
ハウジングの一端寄りの内周面部分に当接する円筒部
と、この円筒部に連設され、前記状態で前記弁ハウジン
グの一端から該弁ハウジングの外方に突出する溶着部と
が一体に設けられており、 前記弁座により前記弁ハウジングの一端を閉塞した状態
で、前記１つの板材の前記溶着部と前記弁ハウジングの
一端との接合部分が、不活性ガス雰囲気下でのレーザ溶
接と不活性ガス雰囲気下での非溶極式アーク溶接とのう
ちいずれか一方により溶着されている、 ことを特徴とするロータリ式流路切換弁。4. A valve seat formed in a valve seat that closes one end of the valve housing by rotating a valve body accommodated in a cylindrical thin valve housing having at least one end opened in a circumferential direction of the valve housing. A rotary type flow path switching valve for switching the communication destination of the switching port between one and the other of the high pressure side port and the low pressure side port formed on the valve seat independently of the switching port. The valve seat is configured by stacking a plurality of plate members each having the switching port, the high-pressure side port, and the low-pressure side port, and a periphery of one of the plurality of plate members, A cylindrical portion that abuts an inner peripheral surface portion near one end of the valve housing in a state where one end of the valve housing is closed by the valve seat, and one end of the valve housing that is connected to the cylindrical portion and is in this state And a welded portion protruding outward from the valve housing is provided integrally with the welded portion of the one plate member and one end of the valve housing in a state where one end of the valve housing is closed by the valve seat. Wherein the joint portion is welded by one of laser welding under an inert gas atmosphere and non-welded electrode arc welding under an inert gas atmosphere. Switching valve.
肉の弁ハウジングに収容された弁体を該弁ハウジングの
周方向に回転させることで、前記弁ハウジングの一端を
閉塞する円板状の弁座に形成された切換ポートの連通先
を、該切換ポートとは独立して前記弁座に各々形成され
た高圧側ポート及び低圧側ポートのうち一方と他方との
間で切り換えるロータリ式流路切換弁において、 前記弁ハウジングの一端寄りの内周面部分には、該弁ハ
ウジングの内径より大きい内径の嵌合部が形成されてお
り、 前記弁座の周縁部は、前記嵌合部の内径に対応する外径
の大径部と、該大径部の外径より小さい外径で前記弁ハ
ウジングの内部に挿入可能な外径の小径部とにより段差
状に形成されており、 前記小径部を前記弁ハウジングの内部に挿入させつつ前
記弁座を前記嵌合部に嵌合した状態で、前記弁ハウジン
グの前記嵌合部と前記弁座の前記大径部との接合部分
が、不活性ガス雰囲気下でのレーザ溶接と不活性ガス雰
囲気下での非溶極式アーク溶接とのうちいずれか一方に
より溶着されている、 ことを特徴とするロータリ式流路切換弁。5. A disc-shaped valve for closing one end of a valve housing by rotating a valve body accommodated in a cylindrical thin valve housing having at least one end opened in a circumferential direction of the valve housing. Rotary flow path switching for switching a communication destination of a switching port formed in a seat between one and the other of a high pressure side port and a low pressure side port respectively formed in the valve seat independently of the switching port. In the valve, a fitting portion having an inner diameter larger than the inner diameter of the valve housing is formed on an inner peripheral surface portion near one end of the valve housing, and a peripheral portion of the valve seat is formed at an inner diameter of the fitting portion. A large-diameter portion having a corresponding outer diameter and a small-diameter portion having an outer diameter smaller than the outer diameter of the large-diameter portion and which can be inserted into the valve housing are formed in a stepped manner, and the small-diameter portion is While being inserted inside the valve housing In a state where the valve seat is fitted to the fitting portion, a joint portion between the fitting portion of the valve housing and the large diameter portion of the valve seat is inactive with laser welding under an inert gas atmosphere. A rotary flow path switching valve, which is welded by one of non-welding type arc welding in a gas atmosphere.
肉の弁ハウジングに収容された弁体を該弁ハウジングの
周方向に回転させることで、前記弁ハウジングの一端を
閉塞する円板状の弁座に形成された切換ポートの連通先
を、該切換ポートとは独立して前記弁座に各々形成され
た高圧側ポート及び低圧側ポートのうち一方と他方との
間で切り換えるロータリ式流路切換弁において、 前記弁座の周縁部には、前記弁ハウジングの一端が挿入
可能な環状溝が形成されており、 前記環状溝に前記弁ハウジングの一端を挿入した状態
で、該弁ハウジングの一端寄りの外周面部分と前記環状
溝との接合箇所が、不活性ガス雰囲気下でのレーザ溶接
と不活性ガス雰囲気下での非溶極式アーク溶接とのうち
いずれか一方により溶着されている、 ことを特徴とするロータリ式流路切換弁。6. A disc-shaped valve for closing one end of the valve housing by rotating a valve body housed in a thin cylindrical valve housing having at least one end opened in a circumferential direction of the valve housing. Rotary flow path switching for switching a communication destination of a switching port formed in a seat between one and the other of a high pressure side port and a low pressure side port respectively formed in the valve seat independently of the switching port. In the valve, an annular groove into which one end of the valve housing can be inserted is formed in a peripheral portion of the valve seat, and one end of the valve housing is shifted toward one end of the valve housing in a state where one end of the valve housing is inserted into the annular groove. The joint between the outer peripheral surface portion and the annular groove is welded by one of laser welding under an inert gas atmosphere and non-electrode welding under an inert gas atmosphere. Features Rotary type flow switching valve.
分には、該弁ハウジングの一端を前記環状溝に挿入した
状態で該環状溝の外縁部分と係合可能な段差部が形成さ
れており、該段差部と前記環状溝の外縁部分との接合部
分が、不活性ガス雰囲気下でのレーザ溶接と不活性ガス
雰囲気下での非溶極式アーク溶接とのうちいずれか一方
によりさらに溶着されている請求項６記載のロータリ式
流路切換弁。7. A step portion is formed on an outer peripheral surface portion near one end of the valve housing, the step portion being engageable with an outer edge portion of the annular groove when one end of the valve housing is inserted into the annular groove. The joint between the step portion and the outer edge portion of the annular groove is further welded by one of laser welding under an inert gas atmosphere and non-electrode welding under an inert gas atmosphere. The rotary flow path switching valve according to claim 6, wherein
側ポート、及び、前記低圧側ポートが各々形成された円
板状の複数の板材を重ね合わせて構成されており、これ
ら複数の板材のうち一部の板材は、前記弁ハウジングの
内部に挿入可能な外径で形成されており、前記複数の板
材のうち前記一部の板材を除く他の一部の板材の周縁部
には、前記一部の板材の外側に延出する環状のフランジ
部が連設されており、該フランジ部は前記弁ハウジング
の外径に対応する内径で形成されており、前記フランジ
部と前記他の一部の板材の周縁部との間に前記環状溝が
画成されている請求項７記載のロータリ式流路切換弁。8. The valve seat is formed by laminating a plurality of disk-shaped plate members on which the switching port, the high-pressure side port, and the low-pressure side port are formed, respectively. Some of the plate members are formed with an outer diameter that can be inserted into the valve housing, and a peripheral portion of another part of the plurality of plate members excluding the part of the plate members includes: An annular flange portion extending outside the part of the plate member is continuously provided, and the flange portion is formed with an inner diameter corresponding to an outer diameter of the valve housing. 8. The rotary flow path switching valve according to claim 7, wherein the annular groove is defined between the peripheral portion of the plate member and the peripheral portion.
ポートの打ち抜き径が相互に異なり、当該打ち抜き径の
相違により、前記各ポートに継手パイプ差し込み用の段
差が形成されている請求項３、４又は８記載のロータリ
式流路切換弁。9. The punching diameter of each of the corresponding ports in the plurality of plate members is different from each other, and a step for inserting a joint pipe is formed in each of the ports due to the difference in the punching diameters. Or a rotary flow path switching valve according to 8.
薄肉の弁ハウジングに収容された弁体を該弁ハウジング
の周方向に回転させることで、前記弁ハウジングの一端
を閉塞する弁座に形成された切換ポートの連通先を、該
切換ポートとは独立して前記弁座に各々形成された高圧
側ポート及び低圧側ポートのうち一方と他方との間で切
り換えるロータリ式流路切換弁において、 前記弁座は、前記切換ポート、前記高圧側ポート、及
び、前記低圧側ポートが各々形成された円板状の基板部
と、該基板部の周縁から立設され前記弁ハウジングの前
記一端に連結される円筒状の連結部とを有しており、 前記基板部の外周と前記連結部の内周とがろう付け処理
により接合されている、 ことを特徴とするロータリ式流路切換弁。10. A valve seat which closes one end of the valve housing by rotating a valve body accommodated in a cylindrical thin-walled valve housing having at least one end opened in a circumferential direction of the valve housing. A rotary type flow path switching valve for switching the communication destination of the switching port between one and the other of the high pressure side port and the low pressure side port formed on the valve seat independently of the switching port. The valve seat has a disc-shaped substrate portion on which the switching port, the high-pressure side port, and the low-pressure side port are respectively formed, and is erected from the periphery of the substrate portion and connected to the one end of the valve housing. A rotary connecting passage switching valve having a cylindrical connecting portion, wherein an outer periphery of the substrate portion and an inner periphery of the connecting portion are joined by a brazing process.
薄肉の弁ハウジングに収容された弁体を該弁ハウジング
の周方向に回転させることで、前記弁ハウジングの一端
を閉塞する弁座に形成された切換ポートの連通先を、該
切換ポートとは独立して前記弁座に各々形成された高圧
側ポート及び低圧側ポートのうち一方と他方との間で切
り換えるロータリ式流路切換弁において、 前記弁座は、前記切換ポート、前記高圧側ポート、及
び、前記低圧側ポートが各々形成された複数の板材を重
ね合わせて構成されており、 前記複数の板材を重ね合わせた状態で、隣り合う各板材
の相互間がろう付け処理により接合されている、 ことを特徴とするロータリ式流路切換弁。11. A valve seat that closes one end of the valve housing by rotating a valve body housed in a cylindrical thin valve housing having at least one end opened in a circumferential direction of the valve housing. A rotary type flow path switching valve for switching the communication destination of the switching port between one and the other of the high pressure side port and the low pressure side port formed on the valve seat independently of the switching port. The valve seat is configured by stacking a plurality of plate members on which the switching port, the high-pressure side port, and the low-pressure side port are formed, respectively. A rotary type flow switching valve, wherein the plate members are joined to each other by brazing.
互間に間隙を設けた状況下でなされたものである請求項
１１記載のロータリ式流路切換弁。12. The rotary flow path switching valve according to claim 11, wherein the brazing process is performed in a state where a gap is provided between the respective plate members.
圧側ポート、及び、前記低圧側ポートが各々形成された
円板状の基板部と、該基板部の周縁から立設され前記弁
ハウジングの前記一端に連結される円筒状の連結部とを
有しており、前記基板部の外周と前記連結部の内周とが
ろう付け処理により接合されている請求項１１又は１２
記載のロータリ式流路切換弁。13. The valve housing, wherein the valve seat is provided upright from a disc-shaped substrate portion on which the switching port, the high-pressure side port, and the low-pressure side port are respectively formed, and a peripheral edge of the substrate portion. And a cylindrical connecting portion connected to the one end of the base portion, and an outer periphery of the substrate portion and an inner periphery of the connecting portion are joined by a brazing process.
The rotary type flow path switching valve according to the above.
縁には、前記弁座により前記弁ハウジングの一端を閉塞
した状態で前記弁ハウジングの一端寄りの内周面部分に
当接する円筒部と、この円筒部に連設され、前記状態で
前記弁ハウジングの一端から該弁ハウジングの外方に突
出する突出部とが一体に設けられており、前記状態で前
記円筒部の外周と前記弁ハウジングの内周との間に生じ
る間隙に、前記複数の板材の相互間を接合させるろうが
充填され、該充填されたろうを用いたろう付け処理によ
り、前記状態で前記円筒部の外周と前記弁ハウジングの
内周とが接合されている請求項１１又は１２記載のロー
タリ式流路切換弁。14. A peripheral portion of one of the plurality of plate members, a cylindrical portion contacting an inner peripheral surface portion near one end of the valve housing with one end of the valve housing closed by the valve seat. A protrusion protruding outward from the valve housing from one end of the valve housing in the above state is provided integrally with the cylindrical portion, and in this state, an outer periphery of the cylindrical portion and the valve housing are provided. The gap formed between the outer periphery of the cylindrical portion and the valve housing is filled with a brazing that joins the plurality of plate members to each other in the gap formed between the outer periphery of the cylindrical portion and the brazing process using the filled brazing. The rotary flow path switching valve according to claim 11, wherein the rotary flow path switching valve is joined to an inner circumference.
れ、該継手パイプの外周と前記ポートの内周と前記がろ
う付け処理により接合されている請求項１０、１１、１
２、１３又は１４記載のロータリ式流路切換弁。15. A joint pipe is inserted into the port, and an outer periphery of the joint pipe is joined to an inner periphery of the port by brazing.
15. The rotary flow path switching valve according to 2, 13, or 14.
れていて、該貫通孔には前記弁体の回転中心をなす軸部
材が挿通されており、該軸部材の外周と前記貫通孔の内
周とがろう付け処理により接合されている請求項１０、
１１、１２、１３、１４又は１５記載のロータリ式流路
切換弁。16. A through hole is formed in a center portion of the valve seat, and a shaft member serving as a rotation center of the valve body is inserted into the through hole. The inner periphery of the hole is joined by a brazing process,
The rotary flow path switching valve according to 11, 12, 13, 14 or 15.
でなされたものである請求項１０、１１、１２、１３、
１４、１５又は１６記載のロータリ式流路切換弁。17. The method according to claim 10, wherein the brazing process is performed in a reducing gas atmosphere.
17. The rotary flow path switching valve according to 14, 15, or 16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10321900A JPH11248021A (en) | 1997-11-12 | 1998-11-12 | Rotary type passage selector valve |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31081097 | 1997-11-12 | ||
| JP9-310810 | 1997-11-12 | ||
| JP10321900A JPH11248021A (en) | 1997-11-12 | 1998-11-12 | Rotary type passage selector valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11248021A true JPH11248021A (en) | 1999-09-14 |
Family
ID=26566463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10321900A Withdrawn JPH11248021A (en) | 1997-11-12 | 1998-11-12 | Rotary type passage selector valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11248021A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003254461A (en) * | 2002-03-05 | 2003-09-10 | Saginomiya Seisakusho Inc | Electric control valve |
| WO2004072521A1 (en) * | 2003-02-14 | 2004-08-26 | Kabushiki Kaisha Saginomiya Seisakusho | Electrically operated switch-over valve |
| US7316384B2 (en) | 2003-02-14 | 2008-01-08 | Kabushiki Kaisha Saginomiya Seisakusho | Electric control valve |
| JP2012097773A (en) * | 2010-10-29 | 2012-05-24 | Saginomiya Seisakusho Inc | Method of manufacturing channel switching valve and channel switching valve |
| JP2014510887A (en) * | 2011-04-02 | 2014-05-01 | チャアチャン サンファ シーオー エルティーディー | Cooling system and motorized valve |
-
1998
- 1998-11-12 JP JP10321900A patent/JPH11248021A/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003254461A (en) * | 2002-03-05 | 2003-09-10 | Saginomiya Seisakusho Inc | Electric control valve |
| WO2004072521A1 (en) * | 2003-02-14 | 2004-08-26 | Kabushiki Kaisha Saginomiya Seisakusho | Electrically operated switch-over valve |
| US7204271B2 (en) | 2003-02-14 | 2007-04-17 | Kabushiki Kaisha Saginomiya Seisakusho | Electrically operated switch-over valve |
| US7316384B2 (en) | 2003-02-14 | 2008-01-08 | Kabushiki Kaisha Saginomiya Seisakusho | Electric control valve |
| CN100360844C (en) * | 2003-02-14 | 2008-01-09 | 株式会社鹭宫制作所 | Electrically operated switch-over valve |
| CN100378387C (en) * | 2003-02-14 | 2008-04-02 | 株式会社鹭宫制作所 | Electric-type control valve |
| JP2012097773A (en) * | 2010-10-29 | 2012-05-24 | Saginomiya Seisakusho Inc | Method of manufacturing channel switching valve and channel switching valve |
| JP2014510887A (en) * | 2011-04-02 | 2014-05-01 | チャアチャン サンファ シーオー エルティーディー | Cooling system and motorized valve |
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Legal Events
| Date | Code | Title | Description |
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| A300 | Withdrawal of application because of no request for examination |
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