JP2004050893A - Expansion valve - Google Patents

Expansion valve Download PDF

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Publication number
JP2004050893A
JP2004050893A JP2002208218A JP2002208218A JP2004050893A JP 2004050893 A JP2004050893 A JP 2004050893A JP 2002208218 A JP2002208218 A JP 2002208218A JP 2002208218 A JP2002208218 A JP 2002208218A JP 2004050893 A JP2004050893 A JP 2004050893A
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JP
Japan
Prior art keywords
cassette unit
housing
valve
flange portion
expansion 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.)
Pending
Application number
JP2002208218A
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Japanese (ja)
Inventor
Kazuto Kobayashi
小林　和人
Kimimichi Yano
矢野　公道
Kazuhiko Watanabe
渡辺　和彦
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Fujikoki Corp
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Fujikoki Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujikoki Corp filed Critical Fujikoki Corp
Priority to JP2002208218A priority Critical patent/JP2004050893A/en
Publication of JP2004050893A publication Critical patent/JP2004050893A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/06—Details of flow restrictors or expansion valves
    • F25B2341/068—Expansion valves combined with a sensor
    • F25B2341/0683—Expansion valves combined with a sensor the sensor is disposed in the suction line and influenced by the temperature or the pressure of the suction gas

Abstract

<P>PROBLEM TO BE SOLVED: To constitute an expansion valve by a cassette unit comprising as a main part mechanism and a housing for inserting the cassette unit and to easily assemble the both by a screw mechanism. <P>SOLUTION: The expansion valve 1 comprises the housing 10 formed with a coolant passage and the cassette unit 100. In the cassette unit 100, a flange 111 and a tube member 110 are separately constituted and fixed at a welding part W<SB>1</SB>. An outer screw 111a is formed on the outer periphery of the flange 111, and an inner screw is formed on the inner diameter part 42 of an inlet of the housing 10. A head 121 of a lid member 120 of the cassette unit has a hexagonal shape, and the cassette unit 100 is assembled by screwing it into the housing 10 using a tool such as a wrench. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
この発明は、例えば車両の空調装置の冷凍サイクルに装備される膨張弁に関する。
【０００２】
【従来の技術】
例えば、特開平８−１５２２３２号公報は、膨張弁本体に対してダイアフラム室を有する機能部品を別体に構成し、この別体の機能部品を弁本体に組み込むことで、膨張弁を構成するものを開示している。そして、感温ケース内にバネを設けて、バネ受けとの間の長さをねじ機構により調整するものが記載されている。同様の構成は、特開平１１−３５１４４０号公報にも記載されている。
【０００３】
【発明が解決しようとする課題】
上述した特開平８−１５２２３２号公報に記載された膨張弁にあっては、感温ケースの取付部にねじ機構を備え、また機能部品全体を弁本体に固定する手段としてもねじ機構を使用しており、全体として複雑な構成とならざるを得ない。
本発明は、膨張弁を配管部材と膨張弁の機能を有するカセットユニットで構成することによって、より簡素化された構造を備える膨張弁を提供するものである。
【０００４】
【課題を解決するための手段】
本発明の膨張弁は、基本的な手段として、空調装置の各機器に連通される配管が接続される冷媒の通路を有するハウジングと、ハウジングに挿入されるカセットユニットを備える。そして、カセットユニットは、フランジ部と、フランジ部とは別体に形成されるチューブ部材と、チューブ部材の内部に固定されるガイド部材、オリフィス部材及びプレート部材と、オリフィス部材が形成する弁室内に配備される弁体と、弁室を形成するプレート部材と弁体の間に設けられてオリフィス部材側へ向けて付勢するスプリングと、弁体を操作するシャフト部材と、フランジ部に溶接される蓋部材と、蓋部材とフランジ部に挟まれてガスチャージ室を形成するダイアフラムと、ダイアフラムの変位をシャフト部材に伝達するストッパ部材を備える。また、ハウジングのカセットユニット取付用の内径部の入口部に設けられる内ねじ部と、カセットユニットのフランジ部の外周部に設けられる外ねじ部を備えるものである。
【０００５】
さらに、ハウジングのカセットユニット取付用の内径部の入口部に設けられる内ねじ部と、カセットユニットのチューブ部材の外周部に固着されるリング部材と、リング部材の外周部に設けられる外ねじ部を備えるものである。
【０００６】
【発明の実施の形態】
図１は、本発明のカセット構造を有する膨張弁の一実施形態を示す説明図である。
全体を符号１で示す膨張弁は、別部材で構成されるハウジング１０と、カセットユニット１００を備える。
ハウジング１０は、適宜の材料例えばアルミニウムで形成される本体２０を有し、本体２０には図示しないコンプレッサ側から供給される冷媒の配管が接続される通路３０、蒸発器側（図示せず）へ向かう冷媒の配管が接続される通路３２、蒸発器から戻る冷媒の配管が接続される通路３４、コンプレッサ側へ戻る冷媒の配管が接続される通路３６が形成される。
【０００７】
本体２０の中心部には、冷媒の通路に直交する方向に、段付の内径部４０，４２，４４，４６が加工される。内径部４６は、有底の穴を形成する。
ハウジング１０の本体２０の内径部に挿入されるカセットユニット１００は、例えばステンレス材を絞り加工等により形成するチューブ部材１１０を有する。チューブ部材１１０は、フランジ部１１１と別体に形成され、溶接手段Ｗ１により接合される。チューブ部材１１０は、段付部１１３，１１５が設けられる。チューブ部材１１０は、フランジ部１１１とは反対側の端部は開口している。
【０００８】
フランジ部１１１には、ストッパ部材１４０が配設され、ストッパ部材１４０の上面に当接するダイアフラム１３０の周辺部を挟んだ状態で蓋部材１２０が一体に溶接される。蓋部材１２０とダイアフラム１３０はガスチャージ室１２２を形成し、所定のガスが充填され、栓体１２４により封止される。このガスチャージ室１２２とダイアフラム１３０は、弁体の駆動機構を構成する。
蓋部材１２０の頭部１２１は、例えば、六角形の平面形状を有する。
【０００９】
チューブ部材１１０には、冷媒が通過する貫通穴１１２，１１４，１１６が形成されている。ストッパ部材１４０の下面には、シャフト部材１５０が当接され、シャフト部材１５０はガイド部材１７０、オリフィス部材１８０を貫通し、弁室１６１内に配置される弁体１６０に当接する。
球形の弁体１６０は、支持部材１６２により支持され、支持部材１６２はスプリング１６４を介して調整プレート１６６に支持される。
【００１０】
ガイド部材１７０にはシール部材１７４が挿入され、保持部材１７２により固定される。シール部材１７４は、シャフト部材１５０をガイドするとともに、蒸発器へ向かう冷媒の通路３２と、蒸発器から戻る冷媒の通路３４との間の冷媒の漏れをシールする。ガイド部材１７０はチューブ部材１１０に対してカシメ加工部Ｋ１により固定される。さらに、オリフィス部材１８０と調整プレート１６６もそれぞれカシメ加工部Ｋ２，Ｋ３により固定される。
【００１１】
カセットユニット１００と本体２０の内径部との間には、３個のシール部材６２，６４，６６が嵌着され、カセットユニット１００の外周部とハウジング１０の本体２０の内径部との間のシール部を形成する。
【００１２】
かかる構成により、蒸発器からコンプレッサ側に送出される冷媒の通路３４，３６内の低圧冷媒の温度がシャフト部材１５０及びストッパ部材１４０を介してガスチャージ室１２２に伝達され、ガスチャージ室１２２内に封入された冷媒の圧力が変化し、この圧力変化がダイアフラム１３０及びシャフト部材１５０により弁体１６０に伝達され、上記圧力変化とスプリング１６４の付勢力及び上記通路３４，３６内の冷媒圧力の釣り合う位置に弁体１６０が駆動されて、コンプレッサ側から供給される冷媒の通る通路３０から蒸発器に送出される冷媒の量が制御される。
【００１３】
カセットユニット１００をハウジング１０に固着する構造は以下の通りである。
ハウジング１０の入口の内径部４２には、内ねじ部４２ａが形成される。そして、フランジ部１１１の外周には、外ねじ部１１１ａが形成される。
カセットユニット１００の蓋部材１２０の頭部１２１は、平面形状が六角形に形成されている。そこで、カセットユニット１００をハウジング１０内にシール部材とともに挿入し、蓋部材１２０の頭部１２１にレンチ等の工具を当接し、フランジ部１１１の外ねじ部１１１ａをハウジング１０の内ねじ部４２ａに螺合する。
シール部材６２が弾性変形し、カセットユニット１００は、ハウジング１０に対して確実に固着される。
【００１４】
図２は、本発明の他の実施形態を示す説明図である。
この膨張弁のカセットユニット１００ａは、フランジ部１１１とチューブ部材１１０が一体に形成されており、チューブ部材１１０の外周に外ねじ部１１０ａが設けられている。
ハウジング１０の内径部４２には、内ねじ部４２ａが設けられている。
【００１５】
カセットユニット１００ａの蓋部材１２０の頭部１２１は、平面形状が六角形に形成されている。そこで、カセットユニット１００ａをハウジング１０内にシール部材とともに挿入し、蓋部材１２０の頭部１２１にレンチ等の工具を当接し、フランジ部１１１の外ねじ部１１１ａをハウジング１０の内ねじ部４２ａに螺合する。
シール部材６２が弾性変形し、カセットユニット１００ａは、ハウジング１０に対して確実に固着される。
【００１６】
図３、図４は、本発明の他の実施形態を示す説明図である。
この膨張弁のカセットユニット１００ｂは、フランジ部１１１とチューブ部材１１０が一体に形成されており、チューブ部材１１０の外周には、リング部材２００が溶接手段Ｗ１により固着されている。
【００１７】
図４にも示すように、リング部材２００の外周には、外ねじ部２００ａが形成してある。
ハウジング１０の内径部４２には、内ねじ部４２ａが設けられている。
カセットユニット１００ｂの蓋部材１２０の頭部１２１は、平面形状が六角形に形成されている。そこで、カセットユニット１００ｂをハウジング１０内にシール部材とともに挿入し、蓋部材１２０の頭部１２１にレンチ等の工具を当接し、フランジ部１１１の外ねじ部１１１ａをハウジング１０の内ねじ部４２ａに螺合する。
シール部材６２が弾性変形し、カセットユニット１００ｂは、ハウジング１０に対して確実に固着される。
【００１８】
【発明の効果】
本発明の膨張弁は以上のように、空調装置の各機器を結ぶ配管が取付けられるハウジングと、膨張弁の主要な機器を装備したカセットユニットを別体にして用意し、このカセットユニットをハウジングに対して組付けることで、膨張弁を完成するものである。
ハウジングに対するカセットユニットの固着手段として、ねじ機構を採用して全体の構造の簡素化を図っている。
【図面の簡単な説明】
【図１】本発明の実施形態を示す説明図。
【図２】本発明の他の実施形態を示す説明図。
【図３】本発明の他の実施形態を示す説明図。
【図４】リング部材の説明図。
【符号の説明】
１　膨張弁
１０　ハウジング
２０　本体
３０，３２，３４，３６　冷媒通路
４０，４２，４４，４６　内径部
１００　カセットユニット
１１０　チューブ部材
１１１　フランジ部
１２０　蓋部材[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an expansion valve provided in a refrigeration cycle of, for example, a vehicle air conditioner.
[0002]
[Prior art]
For example, Japanese Patent Application Laid-Open No. 8-152232 discloses an expansion valve in which a functional component having a diaphragm chamber is formed separately from an expansion valve main body, and this separate functional component is incorporated into the valve main body. Is disclosed. A description is given of an apparatus in which a spring is provided in a temperature-sensitive case and the length between the spring and the spring receiver is adjusted by a screw mechanism. A similar configuration is also described in JP-A-11-351440.
[0003]
[Problems to be solved by the invention]
In the expansion valve described in Japanese Patent Application Laid-Open No. 8-152232, a screw mechanism is provided on the mounting portion of the temperature-sensitive case, and the screw mechanism is used as a means for fixing the entire functional component to the valve body. Therefore, the structure must be complicated as a whole.
The present invention provides an expansion valve having a more simplified structure by configuring the expansion valve with a pipe unit and a cassette unit having functions of the expansion valve.
[0004]
[Means for Solving the Problems]
The expansion valve of the present invention includes, as basic means, a housing having a refrigerant passage to which piping connected to each device of the air conditioner is connected, and a cassette unit inserted into the housing. The cassette unit includes a flange portion, a tube member formed separately from the flange portion, a guide member fixed inside the tube member, an orifice member and a plate member, and a valve chamber formed by the orifice member. A valve body to be provided, a spring provided between the plate member forming the valve chamber and the valve body and biasing toward the orifice member side, a shaft member for operating the valve body, and welded to the flange portion A lid member, a diaphragm sandwiched between the lid member and the flange to form a gas charge chamber, and a stopper member for transmitting the displacement of the diaphragm to the shaft member are provided. In addition, the housing includes an inner screw portion provided at an entrance of an inner diameter portion for mounting the cassette unit, and an outer screw portion provided at an outer peripheral portion of a flange portion of the cassette unit.
[0005]
Further, an inner thread portion provided at an inlet portion of an inner diameter portion for mounting the cassette unit of the housing, a ring member fixed to an outer peripheral portion of a tube member of the cassette unit, and an outer thread portion provided at an outer peripheral portion of the ring member are provided. To provide.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is an explanatory view showing an embodiment of an expansion valve having a cassette structure according to the present invention.
The expansion valve denoted by reference numeral 1 as a whole includes a housing 10 formed of a separate member and a cassette unit 100.
The housing 10 has a main body 20 formed of an appropriate material, for example, aluminum. The main body 20 is connected to a passage 30 to which a pipe for a refrigerant supplied from a compressor (not shown) is connected, and to the evaporator (not shown). A passage 32 is connected to a pipe of the refrigerant going to the refrigerant, a passage 34 is connected to a pipe of the refrigerant returning from the evaporator, and a passage 36 is connected to a pipe of the refrigerant returning to the compressor side.
[0007]
In the center of the main body 20, stepped inner diameter portions 40, 42, 44, 46 are machined in a direction orthogonal to the passage of the refrigerant. The inner diameter part 46 forms a hole with a bottom.
The cassette unit 100 inserted into the inner diameter portion of the main body 20 of the housing 10 has a tube member 110 formed by, for example, drawing a stainless steel material. Tube member 110 is formed separately from the flange portion 111, it is joined by welding means W 1. The tube member 110 is provided with stepped portions 113 and 115. The tube member 110 has an opening at the end opposite to the flange 111.
[0008]
A stopper member 140 is provided on the flange portion 111, and the lid member 120 is integrally welded with the peripheral portion of the diaphragm 130 in contact with the upper surface of the stopper member 140 sandwiched therebetween. The lid member 120 and the diaphragm 130 form a gas charge chamber 122, are filled with a predetermined gas, and are sealed with a stopper 124. The gas charge chamber 122 and the diaphragm 130 constitute a driving mechanism of the valve body.
The head 121 of the lid member 120 has, for example, a hexagonal planar shape.
[0009]
The tube member 110 has through holes 112, 114, and 116 through which the refrigerant passes. The shaft member 150 is in contact with the lower surface of the stopper member 140, and the shaft member 150 penetrates the guide member 170 and the orifice member 180, and contacts the valve body 160 disposed in the valve chamber 161.
The spherical valve element 160 is supported by a support member 162, and the support member 162 is supported by an adjustment plate 166 via a spring 164.
[0010]
The seal member 174 is inserted into the guide member 170 and fixed by the holding member 172. The seal member 174 guides the shaft member 150 and seals leakage of the refrigerant between the refrigerant passage 32 toward the evaporator and the refrigerant passage 34 returning from the evaporator. Guide member 170 is fixed by caulking portion K 1 with respect to the tube member 110. Furthermore, the orifice member 180 and the adjustment plate 166 is also fixed by the caulking portion K 2, K 3, respectively.
[0011]
Three seal members 62, 64, 66 are fitted between the cassette unit 100 and the inner diameter of the main body 20 to provide a seal between the outer circumference of the cassette unit 100 and the inner diameter of the main body 20 of the housing 10. Form a part.
[0012]
With this configuration, the temperature of the low-pressure refrigerant in the passages 34 and 36 of the refrigerant sent from the evaporator to the compressor side is transmitted to the gas charge chamber 122 via the shaft member 150 and the stopper member 140, and The pressure of the enclosed refrigerant changes, and this pressure change is transmitted to the valve body 160 by the diaphragm 130 and the shaft member 150, and the pressure change and the urging force of the spring 164 and the refrigerant pressure in the passages 34, 36 are balanced. The valve body 160 is driven to control the amount of refrigerant sent to the evaporator from the passage 30 through which the refrigerant supplied from the compressor passes.
[0013]
The structure for fixing the cassette unit 100 to the housing 10 is as follows.
An inner thread portion 42a is formed in the inner diameter portion 42 at the entrance of the housing 10. An outer thread portion 111a is formed on the outer periphery of the flange portion 111.
The head 121 of the lid member 120 of the cassette unit 100 has a hexagonal planar shape. Then, the cassette unit 100 is inserted into the housing 10 together with the seal member, a tool such as a wrench is brought into contact with the head 121 of the lid member 120, and the outer thread 111 a of the flange 111 is screwed into the inner thread 42 a of the housing 10. Combine.
The sealing member 62 is elastically deformed, and the cassette unit 100 is securely fixed to the housing 10.
[0014]
FIG. 2 is an explanatory diagram showing another embodiment of the present invention.
In the cassette unit 100a of this expansion valve, a flange portion 111 and a tube member 110 are integrally formed, and an outer screw portion 110a is provided on the outer periphery of the tube member 110.
The inner diameter portion 42a of the housing 10 is provided with an inner screw portion 42a.
[0015]
The head 121 of the lid member 120 of the cassette unit 100a has a hexagonal planar shape. Then, the cassette unit 100a is inserted into the housing 10 together with the sealing member, a tool such as a wrench is brought into contact with the head 121 of the lid member 120, and the outer thread 111a of the flange 111 is screwed into the inner thread 42a of the housing 10. Combine.
The seal member 62 is elastically deformed, and the cassette unit 100a is securely fixed to the housing 10.
[0016]
3 and 4 are explanatory diagrams showing another embodiment of the present invention.
Cassette unit 100b of the expansion valve, the flange portion 111 and the tube member 110 is formed integrally on the outer periphery of the tube member 110, the ring member 200 is fixed by welding means W 1.
[0017]
As shown in FIG. 4, an outer thread portion 200a is formed on the outer periphery of the ring member 200.
The inner diameter portion 42a of the housing 10 is provided with an inner screw portion 42a.
The head 121 of the lid member 120 of the cassette unit 100b has a hexagonal planar shape. Then, the cassette unit 100b is inserted into the housing 10 together with the seal member, a tool such as a wrench is brought into contact with the head 121 of the lid member 120, and the outer thread 111a of the flange 111 is screwed into the inner thread 42a of the housing 10. Combine.
The seal member 62 is elastically deformed, and the cassette unit 100b is securely fixed to the housing 10.
[0018]
【The invention's effect】
As described above, the expansion valve of the present invention is prepared by separately providing a housing to which piping connecting each device of the air conditioner is attached, and a cassette unit equipped with main components of the expansion valve, and attaching the cassette unit to the housing. By assembling them, the expansion valve is completed.
As a fixing means of the cassette unit to the housing, a screw mechanism is employed to simplify the entire structure.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing an embodiment of the present invention.
FIG. 2 is an explanatory view showing another embodiment of the present invention.
FIG. 3 is an explanatory view showing another embodiment of the present invention.
FIG. 4 is an explanatory view of a ring member.
[Explanation of symbols]
1 Expansion valve 10 Housing 20 Main body 30, 32, 34, 36 Refrigerant passage 40, 42, 44, 46 Inner diameter part 100 Cassette unit 110 Tube member 111 Flange part 120 Cover member

Claims (4)

空調装置に装備されて冷媒の流量を制御する膨張弁であって、
空調装置の各機器に連通される配管が接続される冷媒の通路を有するハウジングと、ハウジングに挿入されるカセットユニットを備え、
カセットユニットは、フランジ部と、フランジ部とは別体に形成されるチューブ部材と、チューブ部材の内部に固定されるガイド部材、オリフィス部材及びプレート部材と、オリフィス部材が形成する弁室内に配備される弁体と、弁室を形成するプレート部材と弁体の間に設けられてオリフィス部材側へ向けて付勢するスプリングと、弁体を操作するシャフト部材と、フランジ部に溶接される蓋部材と、蓋部材とフランジ部に挟まれてガスチャージ室を形成するダイアフラムと、ダイアフラムの変位をシャフト部材に伝達するストッパ部材を備え、ハウジングのカセットユニット取付用の内径部の入口部に設けられる内ねじ部と、カセットユニットのフランジ部の外周部に設けられる外ねじ部を備える膨張弁。An expansion valve that is provided in the air conditioner and controls the flow rate of the refrigerant,
A housing having a refrigerant passage to which piping connected to each device of the air conditioner is connected, and a cassette unit inserted into the housing,
The cassette unit is provided in a valve chamber formed by the flange portion, a tube member formed separately from the flange portion, a guide member fixed to the inside of the tube member, an orifice member and a plate member, and the orifice member. A valve member, a spring provided between the plate member forming the valve chamber and the valve member to bias toward the orifice member, a shaft member for operating the valve member, and a lid member welded to the flange portion A diaphragm formed between the lid member and the flange portion to form a gas charge chamber, and a stopper member for transmitting the displacement of the diaphragm to the shaft member, the diaphragm being provided at an inlet of an inner diameter portion for mounting the cassette unit of the housing. An expansion valve including a screw portion and an external screw portion provided on an outer peripheral portion of a flange portion of the cassette unit. 空調装置に装備されて冷媒の流量を制御する膨張弁であって、
空調装置の各機器に連通される配管が接続される冷媒の通路を有するハウジングと、ハウジングに挿入されるカセットユニットを備え、
カセットユニットは、フランジ部と、フランジ部と一体に形成されるチューブ部材と、チューブ部材の内部に固定されるガイド部材、オリフィス部材及びプレート部材と、オリフィス部材が形成する弁室内に配備される弁体と、弁室を形成するプレート部材と弁体の間に設けられてオリフィス部材側へ向けて付勢するスプリングと、弁体を操作するシャフト部材と、フランジ部に溶接される蓋部材と、蓋部材とフランジ部に挟まれてガスチャージ室を形成するダイアフラムと、ダイアフラムの変位をシャフト部材に伝達するストッパ部材を備え、ハウジングのカセットユニット取付用の内径部の入口部に設けられる内ねじ部と、カセットユニットのチューブ部材の外周部に設けられて外ねじ部を備える膨張弁。An expansion valve that is provided in the air conditioner and controls the flow rate of the refrigerant,
A housing having a refrigerant passage to which piping connected to each device of the air conditioner is connected, and a cassette unit inserted into the housing,
The cassette unit includes a flange portion, a tube member formed integrally with the flange portion, a guide member fixed to the inside of the tube member, an orifice member and a plate member, and a valve disposed in a valve chamber formed by the orifice member. Body, a spring provided between the plate member forming the valve chamber and the valve body and biasing toward the orifice member side, a shaft member operating the valve body, a lid member welded to the flange portion, An inner screw portion provided at the entrance of the inner diameter portion for mounting the cassette unit of the housing, comprising a diaphragm sandwiched between the lid member and the flange portion to form a gas charge chamber, and a stopper member for transmitting the displacement of the diaphragm to the shaft member; And an expansion valve provided on the outer peripheral portion of the tube member of the cassette unit and having an external thread portion. 空調装置に装備されて冷媒の流量を制御する膨張弁であって、
空調装置の各機器に連通される配管が接続される冷媒の通路を有するハウジングと、ハウジングに挿入されるカセットユニットを備え、
カセットユニットは、フランジ部と、フランジ部と一体に形成されるチューブ部材と、チューブ部材の内部に固定されるガイド部材、オリフィス部材及びプレート部材と、オリフィス部材が形成する弁室内に配備される弁体と、弁室を形成するプレート部材と弁体の間に設けられてオリフィス部材側へ向けて付勢するスプリングと、弁体を操作するシャフト部材と、フランジ部に溶接される蓋部材と、蓋部材とフランジ部に挟まれてガスチャージ室を形成するダイアフラムと、ダイアフラムの変位をシャフト部材に伝達するストッパ部材を備え、ハウジングのカセットユニット取付用の内径部の入口部に設けられる内ねじ部と、カセットユニットのチューブ部材の外周部に固着されるリング部材と、リング部材の外周部に設けられる外ねじ部を備える膨張弁。An expansion valve that is provided in the air conditioner and controls the flow rate of the refrigerant,
A housing having a refrigerant passage to which piping connected to each device of the air conditioner is connected, and a cassette unit inserted into the housing,
The cassette unit includes a flange portion, a tube member formed integrally with the flange portion, a guide member fixed to the inside of the tube member, an orifice member and a plate member, and a valve disposed in a valve chamber formed by the orifice member. Body, a spring provided between the plate member forming the valve chamber and the valve body and biasing toward the orifice member side, a shaft member operating the valve body, a lid member welded to the flange portion, An inner screw portion provided at the entrance of the inner diameter portion for mounting the cassette unit of the housing, comprising a diaphragm sandwiched between the lid member and the flange portion to form a gas charge chamber, and a stopper member for transmitting the displacement of the diaphragm to the shaft member; A ring member fixed to the outer peripheral portion of the tube member of the cassette unit, and an external thread portion provided on the outer peripheral portion of the ring member Expansion valve provided. カセットユニットの蓋部材は、平面形状が六角形に形成される請求項１乃至３のいずれかに記載の膨張弁。The expansion valve according to any one of claims 1 to 3, wherein the lid member of the cassette unit has a hexagonal planar shape.
JP2002208218A 2002-07-17 2002-07-17 Expansion valve Pending JP2004050893A (en)

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