JPH1122846A - Motor operated valve - Google Patents
Motor operated valveInfo
- Publication number
- JPH1122846A JPH1122846A JP17871397A JP17871397A JPH1122846A JP H1122846 A JPH1122846 A JP H1122846A JP 17871397 A JP17871397 A JP 17871397A JP 17871397 A JP17871397 A JP 17871397A JP H1122846 A JPH1122846 A JP H1122846A
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- motor
- flat plate
- operated valve
- valve
- 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.)
- Granted
Links
Landscapes
- Lift Valve (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、例えばヒートポン
プ式エアコンや冷凍機等を構成する冷凍サイクルに組み
込まれて使用される電動弁に係り、特に、ステッピング
モータのキャン部分と該キャンを弁本体に連結する蓋状
部材とを改善した電動弁に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor-operated valve incorporated in a refrigeration cycle constituting, for example, a heat pump air conditioner or a refrigerator, and more particularly to a can portion of a stepping motor and the can mounted on a valve body. The present invention relates to a motor-operated valve having an improved lid-like member to be connected.
【0002】[0002]
【従来の技術】従来のこの種の電動弁としては、図4に
示されるものが提案されている。図示例の電動弁1'
は、基本的には、ステッピングモータ10と、弁本体2
0と、ロータ軸35及び弁軸30とを具備しており、前
記ロータ軸35を前記ステッピングモータ10により回
転駆動してねじ送りにより昇降させ、それに伴って昇降
する弁軸30の弁体31で前記弁本体20に形成された
流体入出口(弁座)23を開閉する(開口面積を変化さ
せる)ことにより流量を調整するようになっている。2. Description of the Related Art FIG. 4 shows a conventional motor-operated valve of this type. Motorized valve 1 'in the illustrated example
Is basically a stepping motor 10 and a valve body 2
0, a rotor shaft 35, and a valve shaft 30. The rotor shaft 35 is driven to rotate by the stepping motor 10 to be moved up and down by screw feed. The flow rate is adjusted by opening and closing (changing the opening area) a fluid inlet / outlet (valve seat) 23 formed in the valve body 20.
【0003】前記ステッピングモータ10は、前記弁本
体20に蓋状部材18を介して連結固定された円筒状の
キャン11の外周部に嵌装されたステータヨーク13
と、ボビン14と、このボビン14に巻装され、外部か
ら通電されるマグネットワイヤ15と、スリーブ40に
固定されたボンド磁石よりなるロータ39と、を備えて
構成されている。[0003] The stepping motor 10 comprises a stator yoke 13 fitted on the outer periphery of a cylindrical can 11 fixedly connected to the valve body 20 via a lid 18.
, A bobbin 14, a magnet wire 15 wound around the bobbin 14 and energized from the outside, and a rotor 39 made of a bonded magnet fixed to a sleeve 40.
【0004】前記弁本体20は、弁室21を有し、この
弁室21に連通する導管24が接続される流体入出口2
2が設けられ、その底面部に導管25が接続されるとと
もに、前記弁軸30により開閉される前記流体入出口2
3が形成されている。前記弁本体20の弁室21上方に
は、内周部に雌ねじ部が形成されたガイドブッシュ26
が内嵌固定されている。The valve body 20 has a valve chamber 21 and a fluid inlet / outlet 2 to which a conduit 24 communicating with the valve chamber 21 is connected.
2, a conduit 25 is connected to the bottom surface thereof, and the fluid inlet / outlet 2 is opened / closed by the valve shaft 30.
3 are formed. Above the valve chamber 21 of the valve body 20, a guide bush 26 having a female screw portion formed on the inner periphery.
Are fixed inside.
【0005】前記キャン11、前記蓋状部材18、及
び、前記弁本体20との組立密封固定は、まず、前記弁
本体20の上部環状突出片20aに前記蓋状部材18を
嵌合し、前記上部環状突出片20aを外周方向にかしめ
ると共に、前記弁本体20の外周上部20bと前記蓋状
部材18の下面とをロー付け溶接Aを行う。その後、前
記キャン11と前記蓋状部材18内に前記ガイドブッシ
ュ26、ロータ39、スリーブ40、弁軸30、ロータ
軸35等を収納した後、前記蓋状部材18の上部鍔部1
8aと前記キャン11の下部鍔部11aとを当接させ
て、その周囲をTiG溶接(タングステンイナートガス
溶接)等で拝み溶接Bを行い、これによって、前記キャ
ン11内を密封状態としている。In order to assemble and fix the can 11, the lid 18, and the valve body 20, first, the lid 18 is fitted to an upper annular projecting piece 20 a of the valve body 20. The upper annular projecting piece 20a is crimped in the outer peripheral direction, and the outer peripheral upper part 20b of the valve body 20 and the lower surface of the lid-like member 18 are brazed and welded. Then, after the guide bush 26, the rotor 39, the sleeve 40, the valve shaft 30, the rotor shaft 35, and the like are stored in the can 11 and the lid member 18, the upper flange 1 of the lid member 18 is formed.
8a and the lower flange portion 11a of the can 11 are brought into contact with each other, and the periphery of the can is welded by TiG welding (tungsten inert gas welding) or the like, whereby the inside of the can 11 is sealed.
【0006】このような構成の電動弁1’においては、
前記マグネットワイヤ15を一方向に通電励磁すると、
ロータ39、スリーブ40、ロータ軸35、ホルダ28
等が一体的に回転し、前記雌ねじ部と雄ねじ部との螺合
によるねじ送りにより前記弁軸30が下降せしめられて
前記流体入出口23を閉方向に調整する。また、前記マ
グネットワイヤ15を他方向に通電励磁すると、前記弁
軸30が上昇して前記流体入出口23を開方向に調整す
る。In the electric valve 1 'having such a structure,
When the magnet wire 15 is energized and excited in one direction,
Rotor 39, sleeve 40, rotor shaft 35, holder 28
The valve shaft 30 is lowered by screw feed by screwing the female screw portion and the male screw portion, and the fluid inlet / outlet 23 is adjusted in the closing direction. Further, when the magnet wire 15 is energized in the other direction, the valve shaft 30 is raised to adjust the fluid inlet / outlet 23 in the opening direction.
【0007】[0007]
【発明が解決しようとする課題】そして、前記電動弁
1’は、冷凍サイクルに組み込まれて使用される稼働時
には、前記キャン11内にも冷媒が供給されるので、該
キャン11内は前記冷媒によって圧力状態に置かれてい
る。このため、前記キャン11と前記蓋状部材18との
TiG溶接等の拝み溶接部B、及び、前記弁本体20の
外周部20bと前記蓋状部材18の下面とのロー付け溶
接部Aは、その電動弁1’の前記冷媒の圧力負荷状態で
の長期の使用に耐えるものでなければならない。When the motor-operated valve 1 'is operated while being incorporated in a refrigeration cycle, the refrigerant is also supplied to the can 11 so that the refrigerant in the can 11 is filled with the refrigerant. Is placed in a pressure state. For this reason, a bead welding portion B such as TiG welding between the can 11 and the lid member 18 and a brazing weld portion A between the outer peripheral portion 20b of the valve body 20 and the lower surface of the lid member 18 are: The motor-operated valve 1 'must be able to withstand long-term use under the pressure load of the refrigerant.
【0008】また、近年、フロンガス等によるオゾン層
の破壊等の環境上の問題から旧来から使用されている冷
媒R−22が、フロン規制の対象となったことからその
代替冷媒として例えば冷媒R410Aが採用されてきて
いる。この代替冷媒R410Aは、前記冷凍サイクル等
で使用する場合には、前記旧来からの冷媒R−22に比
べて、高圧状態(概ね1.4〜1.5倍程度)で作動す
ることになる。このため、前記電動弁1’の稼働中は、
前記キャン11内も代替冷媒R410Aの使用によっ
て、従来の冷媒R−22に比べて高圧状態となり、前記
旧来からの冷媒R−22ではその強度に問題がなかった
前記溶接部B及びロー付け溶接部Aにおいても、前記高
圧状態に耐える構造のものでなければならなくなった。Further, in recent years, refrigerant R-22 which has been used for a long time due to environmental problems such as destruction of the ozone layer due to chlorofluorocarbon gas has been subject to chlorofluorocarbon regulation. Has been adopted. When the alternative refrigerant R410A is used in the refrigeration cycle or the like, it operates in a high pressure state (about 1.4 to 1.5 times) as compared with the conventional refrigerant R-22. Therefore, during the operation of the electric valve 1 ′,
The use of the alternative refrigerant R410A also causes the inside of the can 11 to be in a higher pressure state than the conventional refrigerant R-22, and the conventional refrigerant R-22 has no problem in its strength. Also in A, the structure must be able to withstand the high pressure state.
【0009】ところで、本発明者等の実験によれば、従
来の電動弁1’の前記キャン11と前記蓋状部材18と
のTiG溶接等の拝み接合溶接部Bは、図5に示したよ
うに、前記新冷媒R410Aの内圧によって、前記キャ
ン11と前記蓋状部材18との各々は、反対方向の作用
力Fもしくは作用力F’を受けることとなり、前記蓋状
部材18の上部鍔部18aと前記キャン11の下部鍔部
11aとを前記拝み接合溶接部B部分の作用点Eを中心
として互いに離す方向に作用し、前記拝み接合溶接部B
に分離作用を生じさせることとなる。According to experiments conducted by the present inventors, the conventional joint 1 B of the conventional motor-operated valve 1 ′, such as TiG welding between the can 11 and the lid 18, is shown in FIG. Meanwhile, due to the internal pressure of the new refrigerant R410A, each of the can 11 and the lid-shaped member 18 receives an acting force F or an acting force F ′ in the opposite direction, and the upper flange portion 18a of the lid-shaped member 18 And the lower flange 11a of the can 11 act in a direction to separate them from each other about the point of action E of the part of the joint B.
Causes a separating action.
【0010】前記キャン11内の冷媒は、その稼働中、
その圧力を交番して変化するものであるので、前記作用
力F及び作用力F’がその強さを繰り返して交番的に変
化することとなる。このことは、前記拝み接合溶接部B
の作用点Eに繰り返し応力が作用することを意味し、や
がて、該繰り返し応力によって前記拝み接合溶接部Bの
溶接ビート(作用点E)が疲労して該溶接ビート内に亀
裂Gが発生する問題が生ずるおそれがある。更に、該亀
裂Gは、前記繰り返し応力の作用によって成長して、前
記電動弁1’の動作に不具合が生じるおそれがある。During operation, the refrigerant in the can 11
Since the pressure is changed alternately, the acting force F and the acting force F ′ are alternately changed by repeating the strength. This is due to the fact that the joint B
Means that a repetitive stress is applied to the application point E, and the repetitive stress eventually fatigues the welding beat (working point E) of the welted joint welded portion B to cause a crack G in the welding beat. May occur. Further, the crack G may grow due to the action of the repetitive stress, causing a malfunction in the operation of the electric valve 1 ′.
【0011】本発明は、前記のような問題に鑑みてなさ
れたもので、その目的とするところは、従来の電動弁に
大きな改造を施さずに、冷媒の内部圧力に基づくキャ
ン、蓋状部材、及び、前記弁本体の接合密封部分の亀裂
あるいはその成長を防止する電動弁を提供することにあ
る。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to provide a can, lid-like member based on the internal pressure of a refrigerant without making large modifications to a conventional electric valve. Another object of the present invention is to provide a motor-operated valve that prevents cracks or growth of a joint-sealed portion of the valve body.
【0012】[0012]
【課題を解決するための手段】前記の目的を達成すべ
く、本発明に係る電動弁は、基本的には、弁本体と、有
底筒状のキャンと、該キャンと溶接結合されて前記弁本
体に取付固定される蓋状部材とを備え、前記蓋状部材
が、環状平板部材とされ、該環状平板部材の外周部に前
記キャンの筒状開口部を係合し、該係合部を溶接により
接合したことを特徴とし、前記キャンは、底部が球状面
に形成されていると共に、前記開口部が拡大されてい
て、一体絞り成形加工され、前記環状平板の外周上部に
は段差形状部を形成し、該段差形状部に前記キャンの筒
状開口部を係合したことを特徴としている。In order to achieve the above object, a motor-operated valve according to the present invention basically comprises a valve body, a bottomed cylindrical can, and a welded connection with the can. A lid-like member attached to and fixed to the valve body, wherein the lid-like member is an annular flat plate member, and a cylindrical opening of the can is engaged with an outer peripheral portion of the annular flat plate member; The can is characterized in that the can has a spherical bottom at the bottom and the opening is enlarged, and is formed by integral drawing. And a cylindrical opening of the can is engaged with the step-shaped portion.
【0013】また、本発明の電動弁の好ましい具体的な
態様は、前記溶接接合が、TiG溶接であり、前記環状
平板部材の外周下部に段差形状部を形成し、前記平板部
材が、前記弁本体の上部環状突出片と係合して、該上部
環状突出片で前記蓋状部材をかしめ固定すると共に、前
記平板部材の下面と前記弁本体の上部周部をロー付溶接
接合したことを特徴としている。In a preferred specific embodiment of the motor-operated valve according to the present invention, the welding connection is TiG welding, a step-shaped portion is formed at a lower portion of the outer periphery of the annular flat plate member, and the flat plate member is provided with the valve. The upper annular projecting piece engages with the upper annular projecting piece to caulk and fix the lid-like member, and the lower surface of the flat plate member and the upper peripheral portion of the valve body are welded to each other by brazing. And
【0014】このような構成とされた本発明に係る電動
弁においては、キャンと平板部材との接合溶接部を、該
平板部材の外周に形成した上部段差形状部に前記キャン
の開口部の端部を係合する構造として、その周囲を溶接
するべく構成したので、従来の冷媒に比べて高圧の代替
冷媒R410Aが前記キャン内に供給されても、前記キ
ャンは、前記代替冷媒R410Aの径方向の圧力に対し
ては、筒状の開口部で受けることとなり、かつ、前記キ
ャンの長手方向(上方)の前記冷媒R410Aの圧力に
対しては、前記溶接部の引っ張り力として受けるので、
該接合部が、キャン内の従来の冷媒に比べて高い圧力の
冷媒R410Aによって、その稼働中、繰り返し応力の
作用を受けたとしても、該繰り返し応力によって亀裂が
発生するようなことはない。また、前記平板部材の周部
の下部に段差形状部を形成したことにより、溶接位置の
バラツキをなくして、溶接強度の強い溶接部を得ること
ができる。In the motor-operated valve according to the present invention having the above-described structure, the joint welding portion between the can and the flat plate member is formed at the upper stepped portion formed on the outer periphery of the flat plate member with the end of the opening of the can. As the structure for engaging the parts, the periphery thereof is welded, so that even if the alternative refrigerant R410A having a higher pressure than the conventional refrigerant is supplied into the can, the can is kept in the radial direction of the alternative refrigerant R410A. Is received at the cylindrical opening, and the pressure of the refrigerant R410A in the longitudinal direction (upper) of the can is received as the tensile force of the welded portion.
Even if the joint is subjected to the action of repeated stress during its operation by the refrigerant R410A having a higher pressure than the conventional refrigerant in the can, no crack is generated by the repeated stress. Further, by forming the step-shaped portion at the lower portion of the peripheral portion of the flat plate member, it is possible to eliminate a variation in the welding position and obtain a welded portion having a high welding strength.
【0015】[0015]
【発明の実施の形態】以下、本発明の電動弁の一実施形
態を添付図面を参照しながら詳細に説明する。該実施形
態を説明するに当たって、前記従来例と同一機能を奏す
るものは同じ符号を付して説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a motor-operated valve according to the present invention will be described in detail with reference to the accompanying drawings. In describing the embodiment, components having the same functions as those of the conventional example will be denoted by the same reference numerals.
【0016】図1は、本実施形態の電動弁1の縦断面図
である。該図1に示す電動弁1は、基本的には、ステッ
ピングモータ10と、弁本体20と、ロータ軸35及び
弁軸30とを具備しており、前記ロータ軸35を前記ス
テッピングモータ10により回転駆動してねじ送りによ
り昇降させ、それに伴って昇降する弁軸30で前記弁本
体20に形成された流体入出口(弁座)23を弁体31
で開閉する(開口面積を変化させる)ことにより流量を
調整するようになっている。FIG. 1 is a longitudinal sectional view of a motor-operated valve 1 according to the present embodiment. The motor-operated valve 1 shown in FIG. 1 basically includes a stepping motor 10, a valve body 20, a rotor shaft 35 and a valve shaft 30, and the rotor shaft 35 is rotated by the stepping motor 10. The fluid inlet / outlet (valve seat) 23 formed in the valve body 20 is moved by a valve shaft 30 which is driven to be moved up and down by screw feed, and which is moved up and down accordingly.
The flow rate is adjusted by opening and closing (changing the opening area) with.
【0017】前記ステッピングモータ10は、前記弁本
体20に蓋状部材33を介して連結固定された円筒状の
キャン32の外周部に嵌装されたステータヨーク13
と、ボビン14と、該ボビン14に巻装され、外部から
通電されるマグネットワイヤ15と、前記ステータヨー
ク13、ボビン14及びマグネットワイヤ15の外周を
封止するモールド12と、前記キャン32の内部に配置
され、後述するスリーブ40に固定されたボンド磁石よ
りなるロータ39と、を備えて構成されている。The stepping motor 10 comprises a stator yoke 13 fitted on the outer periphery of a cylindrical can 32 fixedly connected to the valve body 20 via a lid member 33.
, A bobbin 14, a magnet wire 15 wound around the bobbin 14, and energized from the outside, a mold 12 for sealing the outer periphery of the stator yoke 13, the bobbin 14 and the magnet wire 15, and an inside of the can 32. And a rotor 39 composed of a bonded magnet fixed to a sleeve 40 described later.
【0018】前記モールド12、ステータヨーク13、
ボビン24、及びマグネットワイヤ15は、キャン32
の外周に一体的に嵌装され、それらはモールド12にビ
ス16で取り付けられた押圧係止具17の係止凸部17
aを前記キャン32の外周に、例えば90度間隔で4箇
所設けられた凹部19のいずれかに嵌合させることによ
り位置決め及び抜止め行うようになっている。The mold 12, the stator yoke 13,
The bobbin 24 and the magnet wire 15 are
Are integrally fitted on the outer periphery of the locking projection 17 of the pressing locking tool 17 attached to the mold 12 with screws 16.
a is fitted to the outer periphery of the can 32 in any one of four recesses 19 provided at, for example, 90-degree intervals, thereby positioning and preventing the removal.
【0019】前記弁本体20は、弁室21を有し、該弁
室21に連通する導管24が接続される流体入出口22
が設けられ、その底面部に導管25が接続されるととも
に、前記弁軸30の弁体31により開閉される流体入出
口(弁座)23が形成されている。前記弁本体20の弁
室21の上方には、内周部に雌ねじ部27が形成された
ガイドブッシュ26が、内嵌固定されている。The valve body 20 has a valve chamber 21 and a fluid inlet / outlet 22 to which a conduit 24 communicating with the valve chamber 21 is connected.
A fluid inlet / outlet (valve seat) 23 which is opened and closed by a valve body 31 of the valve shaft 30 is formed. Above the valve chamber 21 of the valve body 20, a guide bush 26 having an internal thread 27 formed on the inner periphery is fixedly fitted.
【0020】前記ガイドブッシュ26の雌ねじ部27に
は、ホルダ28の外周に形成された雄ねじ部29が螺合
せしめられ、該ホルダ28の内周下部にフランジ付きの
弁軸30が摺動可能に嵌挿され、また、前記ホルダ28
の下部には、前記弁軸30のフランジ30aを受けるカ
ラー34が圧入固定されていて、前記弁軸30は、前記
ホルダ28内に縮装されたコイルスプリング37により
常時下方に付勢されている。前記ホルダ28の上部に
は、ロータ軸35がそれと一体的に回転移動できるよう
に内嵌固定されており、前記ホルダ28の上部外周に
は、凸状の可動側ストッパ45が、下向きに突設された
合成樹脂製のスリーブ40と一体的に回転移動できるよ
うに成形固定されている。A male screw portion 29 formed on the outer periphery of the holder 28 is screwed into the female screw portion 27 of the guide bush 26, and a valve shaft 30 with a flange is slidable on the lower inner peripheral portion of the holder 28. The holder 28 is inserted
A collar 34 for receiving the flange 30a of the valve shaft 30 is press-fitted and fixed at a lower portion of the valve shaft 30. The valve shaft 30 is constantly urged downward by a coil spring 37 compressed in the holder 28. . A rotor shaft 35 is fixedly fitted on the upper portion of the holder 28 so that the rotor shaft 35 can rotate integrally therewith. A movable stopper 45 having a convex shape is provided on the outer periphery of the upper portion of the holder 28 so as to project downward. It is molded and fixed so that it can rotate integrally with the sleeve 40 made of synthetic resin.
【0021】また、前記ロータ軸35の上部には、コイ
ルスプリング36が装填されている。このコイルスプリ
ング36は、ロータ39が回転(逆転)せしめられてロ
ータ軸35やスリーブ40等が前記雌ねじ部27と雄ね
じ部29との螺合によるねじ送りにより上昇せしめられ
て、前記ねじ部27,29の螺合が外れたとき、前記ホ
ルダ28をガイドブッシュ26側に押圧して再螺合し易
くするためのものである。A coil spring 36 is mounted above the rotor shaft 35. In the coil spring 36, the rotor 39 is rotated (reversely rotated), and the rotor shaft 35, the sleeve 40, and the like are raised by screwing by screwing the female screw portion 27 and the male screw portion 29. When the screw 29 is disengaged, the holder 28 is pressed toward the guide bush 26 to facilitate re-screw.
【0022】前記ガイドブッシュ26の上部外周には、
前記可動側ストッパ45が衝接せしめられる凸状の固定
側ストッパ55が上向きに突設された合成樹脂製の固定
受け座50が成形固定されている。On the outer periphery of the upper part of the guide bush 26,
A fixed receiving seat 50 made of synthetic resin and having a convex fixed-side stopper 55 to which the movable-side stopper 45 is brought into abutting contact is formed and fixed.
【0023】前記キャン32は、一端に開口部32aを
備えた有底筒状形状をしており、底部32bが楕円球面
状に形成されると共に、前記開口部32aが拡大径とさ
れ、一体絞り加工で成形されている。また、前記蓋状部
材33は、図2(a)に示すように、環状平板部材とし
て形成され、内部に前記弁本体20の上部環状突出片2
0aに嵌合する内部孔33aを有すると共に、その外周
部に上部の段差形状部33bと下部の段差形状部33c
とを有している。The can 32 has a cylindrical shape with a bottom and an opening 32a at one end. The bottom 32b has an elliptical spherical shape, and the opening 32a has an enlarged diameter. It is formed by processing. Further, as shown in FIG. 2A, the lid-like member 33 is formed as an annular flat plate member, and the upper annular projecting piece 2 of the valve body 20 is provided therein.
0a, and has an upper step-shaped portion 33b and a lower step-shaped portion 33c in the outer peripheral portion thereof.
And
【0024】前記キャン32、前記環状平板部材33、
及び、前記弁本体20との組立密封固定は、まず、図2
(b)に示すように、前記弁本体20の上部環状突出片
20aに前記環状平板部材33の内部孔33aを嵌合
し、前記上部環状突出片20aを外周方向にかしめると
共に、前記弁本体20の外周部20bと前記平板部材3
3の下面とをロー付け溶接Aを行う。その後、前記キャ
ン32と前記蓋状部材33内に前記ガイドブッシュ2
6、ロータ39、スリーブ40、弁軸30、ロータ軸3
5等を収納した後、前記平板部材33の上部の段差形状
部33bに前記キャン32の前記開口部32aの端部を
係合させ、その周囲をTiG溶接(タングステンイナー
トガス溶接)等で溶接Dを行い、これによって、前記キ
ャン11内を密封状態としている。The can 32, the annular plate member 33,
In addition, assembling and sealing with the valve body 20 are first performed as shown in FIG.
As shown in (b), the internal hole 33a of the annular flat plate member 33 is fitted to the upper annular projecting piece 20a of the valve body 20, and the upper annular projecting piece 20a is caulked in the outer peripheral direction, and the valve body is 20 and the flat plate member 3
3 and the lower surface 3 is subjected to welding A. Thereafter, the guide bush 2 is inserted into the can 32 and the lid 33.
6, rotor 39, sleeve 40, valve shaft 30, rotor shaft 3
5 and the like, the end of the opening 32a of the can 32 is engaged with the step-shaped portion 33b at the top of the flat plate member 33, and the periphery thereof is welded by TiG welding (tungsten inert gas welding) or the like. As a result, the inside of the can 11 is sealed.
【0025】前記溶接Dにおいて、図3(a)(b)に
示すように、該溶接部Dの前記キャン32の板厚tに対
して、前記平板部材33の板厚Tが厚い場合には、該平
板部材33のヒートマスが増加してしまい、TiG溶接
時に、該溶接Dの溶け込みの位置にバラツキが生じ易
く、その結果として、前記キャン32もしくは平板部材
33の溶接部分D1、D2は、その接合部からの長さl1
もしくはl2のいずれか一方が短くなりアンバラとなっ
てしまい、接合強度が低いものとなる虞がある。In the welding D, as shown in FIGS. 3A and 3B, when the plate thickness T of the flat plate member 33 is larger than the plate thickness t of the can 32 at the welded portion D, As a result, the heat mass of the flat plate member 33 increases, and the position of penetration of the weld D tends to vary during TiG welding. As a result, the welding portions D 1 and D 2 of the can 32 or the flat plate member 33 are reduced. , The length l 1 from its junction
Alternatively, one of l 2 may be shortened and become unbalanced, and the bonding strength may be low.
【0026】このため、本実施形態においては、この溶
接Dの溶け込み位置のバラツキを防ぐためのに、前記蓋
状部材33の下部に下部の段差形状部33cを形成し
て、該平板部材33の外周部の肉厚T1を薄くすること
で、前記蓋状部材33のヒートマスを減少させて、Ti
G溶接時の該溶接Dの溶け込みの位置のバラツキを少な
くし、前記キャン32と平板部材33の溶接部分Dの接
合部からの長さl1、l2を同じ長さに一致させたもので
ある。これにより、前記キャン32と平板部材33の溶
接部分Dを強固な接合部としたものである。For this reason, in the present embodiment, in order to prevent variation in the penetration position of the welding D, a lower step-shaped portion 33 c is formed below the lid member 33, and By reducing the thickness T 1 of the outer peripheral portion, the heat mass of the lid 33 is reduced,
The variation in the penetration position of the welding D during the G welding is reduced, and the lengths l 1 and l 2 of the can 32 and the flat plate member 33 from the welding portion D are made equal to each other. is there. Thus, the welded portion D between the can 32 and the flat plate member 33 is a strong joint.
【0027】このような構成の本実施形態の電動弁1に
おいては、前記マグネットワイヤ15を一方向に通電励
磁すると、ロータ39、スリーブ40、ロータ軸35、
ホルダ28等が一体的に正転(ここでは右回りに回転)
し、前記雌ねじ部27と雄ねじ部29との螺合によるね
じ送りにより前記弁軸30が下降せしめられて、前記弁
体31により、前記流体入出口23が閉じられる。In the motor-operated valve 1 of this embodiment having such a configuration, when the magnet wire 15 is energized in one direction, the rotor 39, the sleeve 40, the rotor shaft 35,
The holder 28 and the like are integrally rotated forward (here, clockwise)
Then, the valve shaft 30 is lowered by screwing by screwing the female screw portion 27 and the male screw portion 29, and the fluid inlet / outlet 23 is closed by the valve element 31.
【0028】前記流体入出口23が弁体31で閉じられ
た時点では、前記可動側ストッパ45が固定側ストッパ
55に未だ衝接しておらず、前記弁軸30の弁体31が
前記流体入出口23を閉じたまま、前記ホルダ28等は
さらに回転下降せしめられる。このときの前記弁軸30
に対する前記ホルダ28の下降量は、前記コイルスプリ
ング37が圧縮されることにより吸収される。When the fluid inlet / outlet 23 is closed by the valve 31, the movable-side stopper 45 has not yet come into contact with the fixed-side stopper 55, and the valve 31 of the valve shaft 30 is connected to the fluid inlet / outlet. With the 23 closed, the holder 28 and the like are further rotated down. The valve shaft 30 at this time
Is lowered by the compression of the coil spring 37.
【0029】その後さらに、前記ホルダ28等が回転下
降せしめられると、前記可動側ストッパ45が固定側ス
トッパ55に衝接し、これにより、前記ロータ39への
通電励磁が続行されていても、前記スリーブ40、軸3
5、ホルダ28等の回転下降運動が強制的に停止せしめ
られる。Thereafter, when the holder 28 and the like are further rotated down, the movable-side stopper 45 abuts against the fixed-side stopper 55, so that the energization to the rotor 39 is continued even if the energization to the rotor 39 is continued. 40, axis 3
5. The rotation and downward movement of the holder 28 and the like are forcibly stopped.
【0030】また、流体入出口23を開くときは、マグ
ネットワイヤ15を前記流体入出口23を閉じるときと
は逆方向に通電励磁することにより、ロータ軸35を逆
回転させて、前記流体入出口23を開口する。When the fluid inlet / outlet 23 is opened, the magnet wire 15 is energized in a direction opposite to the direction in which the fluid inlet / outlet 23 is closed. 23 is opened.
【0031】このように、本実施形態の電動弁1は、キ
ャン32と、該キャン32を弁本体20に連結固定する
蓋状部材33とを、前記説明した構造とし、前記キャン
32と前記蓋状部材33との接合溶接部を、該蓋状部材
33の外周に形成した上部の段差形状部33bに前記キ
ャン32の開口部32aの端部を係合する構造として、
その周囲を溶接するべく構成したので、従来の冷媒に対
して高圧の代替冷媒が前記キャン32内に供給されて
も、前記キャン32は、前記代替冷媒の径方向の圧力に
対しては、筒状の開口部32aで受けることとなり、か
つ、前記代替冷媒の長手方向(上方)の圧力に対して
は、前記溶接部Dの引っ張り力として受けるので、該接
合部Dが、キャン32内の従来の冷媒に比べて高い圧力
の代替冷媒によって、その稼働中、繰り返し応力の作用
を受けたとしても、該繰り返し応力によって亀裂が発生
するようなことはない。As described above, in the motor-operated valve 1 of the present embodiment, the can 32 and the lid member 33 for connecting and fixing the can 32 to the valve body 20 have the above-described structure, and the can 32 and the lid A structure in which an end of the opening 32a of the can 32 is engaged with an upper step-shaped portion 33b formed on the outer periphery of the lid-shaped member 33,
Since the surroundings are welded, even if a high-pressure alternative refrigerant is supplied into the can 32 with respect to the conventional refrigerant, the can 32 is in a cylindrical shape with respect to the radial pressure of the alternative refrigerant. And the pressure in the longitudinal direction (upward) of the alternative refrigerant is received as the pulling force of the welded portion D. Even if the refrigerant is repeatedly subjected to the action of stress during its operation by the alternative refrigerant having a higher pressure than the refrigerant, no crack is generated by the repeated stress.
【0032】また、前記平板部材33は、代替冷媒の作
動圧力に耐えるために、その周部の下部に段差形状部3
3cを形成したことにより、前記溶接位置のバラツキを
なくして、溶接強度の強い溶接部を得ることができる。In order to withstand the operating pressure of the alternative refrigerant, the flat plate member 33 has a stepped portion 3 at its lower part.
By forming 3c, it is possible to eliminate a variation in the welding position and obtain a welded portion having a high welding strength.
【0033】[0033]
【発明の効果】以上の説明から理解されるように、本発
明の電動弁は、蓋状部材を環状平板とし、該環状平板の
外周部に前記キャンの筒状開口部を係合して該係合部を
溶接接合したことで、新冷媒に対応した強度の強いキャ
ン部分を実現できる。また、蓋状部材の環状平板部材の
下部外周に段差形状部を設けたことで、溶接位置を一定
とすることができるので、強度のある接合部を実現でき
る。As will be understood from the above description, the motor-operated valve of the present invention has a lid-like member formed into an annular flat plate, and the cylindrical opening of the can is engaged with the outer peripheral portion of the annular flat plate. By welding the engagement portions, a strong can portion corresponding to the new refrigerant can be realized. Further, by providing the step-shaped portion on the outer periphery of the lower part of the annular flat plate member of the lid-like member, the welding position can be fixed, so that a strong joint can be realized.
【図面の簡単な説明】[Brief description of the drawings]
【図1】本発明に係る電動弁の一実施形態の断面図。FIG. 1 is a sectional view of an embodiment of a motor-operated valve according to the present invention.
【図2】図1に示される電動弁のキャンと蓋状部材との
拡大断面図。FIG. 2 is an enlarged sectional view of a can and a lid-like member of the electric valve shown in FIG.
【図3】電動弁のキャンと蓋状部材との接合溶接部に他
の例を示す断面図。FIG. 3 is a cross-sectional view showing another example of a joint weld between the can of the motor-operated valve and the lid-like member.
【図4】従来の電動弁の一例を示す断面図。FIG. 4 is a sectional view showing an example of a conventional motor-operated valve.
【図5】図4の従来の電動弁におけるキャンと蓋状部材
との溶接接合部を示す拡大断面図。FIG. 5 is an enlarged sectional view showing a welded joint between the can and the lid-like member in the conventional motor-operated valve shown in FIG.
1 電動弁 10 ステッピングモータ 20 弁本体 20a 上部環状突出部 23 流体入出口 30 弁軸 32 キャン 32a 開口部 33 蓋状部材 33a 内部孔 33b 上部環状段差形状部 33c 下部環状段差形状部 DESCRIPTION OF SYMBOLS 1 Electric valve 10 Stepping motor 20 Valve main body 20a Upper annular protrusion 23 Fluid inlet / outlet 30 Valve shaft 32 Can 32a Opening 33 Lid 33a Internal hole 33b Upper annular step 33c Lower annular step 33c
Claims (6)
ンと溶接結合されて前記弁本体に取付固定される蓋状部
材と、を備えた電動弁において、 前記蓋状部材は、環状平板とされ、該環状平板の外周部
に前記キャンの筒状開口部を係合し、該係合部を溶接接
合したことを特徴とする電動弁。1. A motor-operated valve comprising a valve body, a bottomed tubular can, and a lid member welded to the can and attached and fixed to the valve body, wherein the lid member comprises: A motor-operated valve comprising an annular flat plate, wherein a cylindrical opening of the can is engaged with an outer peripheral portion of the annular flat plate, and the engaged portion is welded and joined.
されていると共に、前記開口部が拡大されていて、一体
絞り成形加工されていることを特徴とする請求項1に記
載の電動弁。2. The motor-operated valve according to claim 1, wherein the can has a bottom formed in an elliptical spherical shape, has an enlarged opening, and is integrally drawn. .
形成し、該段差形状部に前記キャンの筒状開口部を係合
したことを特徴とする請求項1又は2に記載の電動弁。3. The motor-operated valve according to claim 1, wherein a stepped portion is formed at an upper portion of an outer periphery of the annular flat plate, and a cylindrical opening of the can is engaged with the stepped portion. .
を特徴とする請求項1乃至3のいずれか一項に記載の電
動弁。4. The motor-operated valve according to claim 1, wherein the welding is TiG welding.
形成したことを特徴とする請求項1乃至4のいずれか一
項に記載の電動弁。5. The motor-operated valve according to claim 1, wherein a step-shaped portion is formed at a lower portion of an outer periphery of the annular flat plate.
体の上部環状突出片を係合して、該上部環状突出片で前
記環状平板をかしめ固定すると共に、前記環状平板の下
面と前記弁本体の上部周部をロー付溶接接合したことを
特徴とする請求項1乃至5のいずれか一項に記載の電動
弁。6. The annular flat plate engages an upper annular projecting piece of the valve body with an internal hole thereof, and caulks and fixes the annular flat plate with the upper annular projecting piece. The motor-operated valve according to any one of claims 1 to 5, wherein an upper peripheral portion of the valve body is welded and joined by brazing.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17871397A JP3905602B2 (en) | 1997-07-03 | 1997-07-03 | Motorized valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17871397A JP3905602B2 (en) | 1997-07-03 | 1997-07-03 | Motorized valve |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH1122846A true JPH1122846A (en) | 1999-01-26 |
JP3905602B2 JP3905602B2 (en) | 2007-04-18 |
Family
ID=16053272
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17871397A Expired - Fee Related JP3905602B2 (en) | 1997-07-03 | 1997-07-03 | Motorized valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3905602B2 (en) |
Cited By (15)
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JP2000297873A (en) * | 1999-04-15 | 2000-10-24 | Fuji Koki Corp | Motor-operated valve |
JP2003254461A (en) * | 2002-03-05 | 2003-09-10 | Saginomiya Seisakusho Inc | Electric control valve |
JP2006057738A (en) * | 2004-08-20 | 2006-03-02 | Pacific Ind Co Ltd | Electric valve |
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JP2007211814A (en) * | 2006-02-07 | 2007-08-23 | Saginomiya Seisakusho Inc | Motor-operated valve and solenoid valve |
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