JP4255892B2

JP4255892B2 - Expansion valve

Info

Publication number: JP4255892B2
Application number: JP2004207257A
Authority: JP
Inventors: 和人小林; 和彦渡辺; 真須藤
Original assignee: Fujikoki Corp
Current assignee: Fujikoki Corp
Priority date: 2003-11-06
Filing date: 2004-07-14
Publication date: 2009-04-15
Anticipated expiration: 2024-07-14
Also published as: JP2006003056A

Description

本発明は、カーエアコン等の空調装置に装備されて、冷媒の温度に応じて蒸発器（エバポレータ）へ供給される冷媒の流量を制御する膨張弁に関する。 The present invention relates to an expansion valve that is installed in an air conditioner such as a car air conditioner and controls the flow rate of refrigerant supplied to an evaporator (evaporator) according to the temperature of the refrigerant.

この種の膨張弁は、例えば、下記の特許文献１に開示されている。
特開２００２−３１０５３８号公報 This type of expansion valve is disclosed, for example, in Patent Document 1 below.
JP 2002-310538 A

ところが、上記特許文献１に開示された従来の膨張弁においては、弁受け部材、スプリング、調節ネジ等、多数の部品点数を要しており、膨張弁の小型化及び軽量化の達成を困難にしていた。
さらには、弁室より調節ネジ部分を通して冷媒の漏れる不具合の生ずるおそれがあった。 However, the conventional expansion valve disclosed in Patent Document 1 requires a large number of parts such as a valve receiving member, a spring, and an adjustment screw, which makes it difficult to reduce the size and weight of the expansion valve. It was.
Furthermore, there is a risk that a refrigerant leaks from the valve chamber through the adjusting screw portion.

かかる点に鑑み、本発明の課題は、カーエアコンの小型化、軽量化の要請に応じ、構造を簡素化し、組立工数を削減した膨張弁を提供することを目的とする。 In view of this point, an object of the present invention is to provide an expansion valve that has a simplified structure and reduced assembly man-hours in response to demands for smaller and lighter car air conditioners.

また、本発明の更なる課題は、シンプルでコストのかからない手段によって、高圧冷媒の圧力変動に対する弁動作の安定を達成することができる膨張弁を提供することを目的とする。 Another object of the present invention is to provide an expansion valve that can achieve stable valve operation against pressure fluctuations of a high-pressure refrigerant by simple and inexpensive means.

また、本発明の更なる課題は、上記課題を達成させた状態で、蒸発器等への取付穴との間隔（肉厚）を確保し、弁本体の腐食を発生させず、冷媒の漏れの惧れのない膨張弁を提供することを目的とする。 Further, according to the present invention, in the state in which the above-mentioned problems are achieved, the space (thickness) between the mounting hole to the evaporator and the like is ensured, the valve body is not corroded, and the refrigerant leaks. An object is to provide an expansion valve without fear.

さらに、本発明の更なる課題は、駆動装置のキャン体の取付座のおねじ部を弁本体の駆動装置取付穴のめねじ部に螺合させることにより、駆動装置が弁本体の駆動装置取付穴に取り付けられ、シール部材が駆動装置のキャン体の取付座の外周に密接し、弁本体の駆動装置取付穴の内周と駆動装置のキャン体の取付座の外周との間からの冷媒の漏れをシール部材により防止することができ、駆動装置のキャン体の取付座のおねじ部を弁本体の駆動装置取付穴のめねじ部に対して締め付ける方向または緩める方向に回転させることで、作動棒を駆動装置と共に上下方向に移動させることができ、駆動装置のキャン体の取付座のおねじ部の弁本体の駆動装置取付穴のめねじ部へのねじ込み量で、弁体が開き始めるセット値の微調整を行うことができる膨張弁を提供することを目的とする。 Furthermore, a further problem of the present invention is that the drive device is attached to the drive device of the valve body by screwing the male screw portion of the mounting seat of the can body of the drive device with the female screw portion of the drive device mounting hole of the valve body. The seal member is in close contact with the outer periphery of the mounting seat of the drive device can body, and the refrigerant from between the inner periphery of the drive device mounting hole of the valve body and the outer periphery of the mounting seat of the drive device can body Leakage can be prevented by the seal member, and it can be operated by rotating the male threaded part of the mounting seat of the can body of the driving device in the tightening or loosening direction relative to the female threaded part of the driving device mounting hole of the valve body. The rod can be moved up and down together with the drive unit, and the valve body starts to open by the amount of screwing of the male thread part of the mounting seat of the can body of the drive unit into the female thread part of the drive unit mounting hole of the valve body You can fine tune the value An object of the present invention is to provide an expansion valve.

本発明は、上記課題を達成するために、下記の手段を講じた。即ち、
請求項１記載の膨張弁は、弁本体と、該弁本体内に形成された有底の弁室と、該弁室から上方に向けて形成されるとともに前記弁本体の上端に開口した開口部と、前記弁本体に形成され前記弁室に高圧冷媒を導入する第１の通路と、前記弁本体に形成され蒸発器側に送出される冷媒が通過する第２の通路と、前記弁本体に形成され前記蒸発器側から送出される冷媒が通過する第３の通路と、前記開口部内に装着され前記弁室から前記第２の通路に向けて流れる冷媒を絞る絞り部を有するオリフィス部と、該絞り部に対向するように前記弁室内に配置された弁体と、前記開口部内に挿入され前記弁体を移動させる作動棒と、前記弁本体の上端に装着され前記作動棒を駆動する駆動装置と、前記開口部内に装着され前記作動棒を摺動自在に案内するガイド部材と、前記ガイド部材に装着され前記作動棒の振動を防止する防振部材とを備え、前記防振部材は、前記作動棒と同心状に配置されるとともに弾性変形可能な円環状の環状部と、該環状部と一体的に形成され前記作動棒の外周面に弾性的に接触する防振バネとからなるものであり、前記弁体、前記オリフィス部、前記ガイド部材、前記作動棒を前記弁本体の上方から前記弁本体内に挿入・装着するようにしたことを特徴とする。 In order to achieve the above object, the present invention has taken the following measures. That is,
The expansion valve according to claim 1 is a valve body, a bottomed valve chamber formed in the valve body, and an opening formed upward from the valve chamber and opened at an upper end of the valve body. A first passage that is formed in the valve body and introduces a high-pressure refrigerant into the valve chamber, a second passage that is formed in the valve body and through which the refrigerant sent to the evaporator passes, and the valve body A third passage through which the refrigerant that is formed and delivered from the evaporator passes, and an orifice portion that has a throttle portion that is mounted in the opening and squeezes the refrigerant flowing from the valve chamber toward the second passage; A valve body disposed in the valve chamber so as to face the throttle portion, an operating rod inserted into the opening to move the valve body, and a drive mounted on the upper end of the valve body to drive the operating rod A device and a sliding guide for the operating rod mounted in the opening. Comprising a guide member, and a vibration isolating member which is attached to the guide member to prevent vibration of the actuating rod, wherein the vibration isolating member, the actuating rod and elastically deformable annular ring while being arranged concentrically And an anti-vibration spring that is integrally formed with the annular portion and elastically contacts the outer peripheral surface of the operating rod, and includes the valve body, the orifice portion, the guide member, and the operating rod. The valve body may be inserted and mounted from above the valve body.

請求項２記載の膨張弁は、請求項１記載の膨張弁において、前記オリフィス部が前記ガイド部材に一体的に形成されていることを特徴とする。 The expansion valve according to a second aspect is the expansion valve according to the first aspect, wherein the orifice portion is formed integrally with the guide member .

請求項３記載の膨張弁は、請求項１記載の膨張弁において、前記ガイド部材は、前記弁本体にカシメ固定されていることを特徴とする。 An expansion valve according to a third aspect of the present invention is the expansion valve according to the first aspect, wherein the guide member is fixed by caulking to the valve body .

請求項４記載の膨張弁は、請求項１記載の膨張弁において、前記ガイド部材は、前記ガイド部材を前記弁本体の所定箇所に位置決めするための位置決め部を前記弁本体と協議して構成していることを特徴とする。 Expansion valve according to claim 4, wherein, in the expansion valve according to claim 1, wherein said guide member includes a positioning portion for positioning said guide member at a predetermined position of the valve body constructed in consultation with the valve body It is characterized by.

請求項５記載の膨張弁は、請求項４記載の膨張弁において、前記位置決め部は、前記ガイド部材に一体的に形成された段部により構成されていることを特徴とする。 According to a fifth aspect of the present invention , in the expansion valve according to the fourth aspect , the positioning portion is constituted by a step portion formed integrally with the guide member .

請求項６記載の膨張弁は、請求項１記載の膨張弁において、前記オリフィス部は、前記弁本体に圧入されていることを特徴とする。 An expansion valve according to a sixth aspect is the expansion valve according to the first aspect , wherein the orifice portion is press-fitted into the valve body .

請求項７記載の膨張弁は、請求項５記載の膨張弁において、前記段部は、前記弁本体に対してシール性を保持する状態で当接していることを特徴とする。 An expansion valve according to a seventh aspect is the expansion valve according to the fifth aspect , wherein the stepped portion is in contact with the valve main body in a state of maintaining a sealing property .

請求項８記載の膨張弁は、請求項７記載の膨張弁において、前記段部における前記弁本体との当接部は、前記弁本体に面接触していることを特徴とする。 An expansion valve according to an eighth aspect is the expansion valve according to the seventh aspect, wherein a contact portion of the step portion with the valve main body is in surface contact with the valve main body .

請求項９記載の膨張弁は、請求項２記載の膨張弁において、前記ガイド部材を前記弁本体に対して位置決めする位置決め部が、前記オリフィス部と前記弁本体によって構成されていることを特徴とする。 The expansion valve according to claim 9 is the expansion valve according to claim 2 , wherein a positioning portion for positioning the guide member with respect to the valve body is constituted by the orifice portion and the valve body. To do.

請求項１０記載の膨張弁は、請求項９記載の膨張弁において、前記位置決め部は、前記弁本体に一体的に形成された段部により構成されていることを特徴とする。 According to a tenth aspect of the present invention , in the expansion valve according to the ninth aspect , the positioning portion is constituted by a step portion formed integrally with the valve body .

請求項１１記載の膨張弁は、請求項９又は請求項１０に記載の膨張弁において、前記ガイド部材は、前記弁本体にカシメ固定されていることを特徴とする。 An expansion valve according to an eleventh aspect is the expansion valve according to the ninth or tenth aspect , wherein the guide member is caulked and fixed to the valve body .

請求項１２記載の膨張弁は、請求項１乃至請求項１１のいずれかに記載の膨張弁において、前記防振部材が前記ガイド部材に内装され、前記ガイド部材における前記防振部材を内装する部位の少なくとも一部が前記第３の通路内に配置されていることを特徴とする。 The expansion valve according to a twelfth aspect of the present invention is the expansion valve according to any one of the first to eleventh aspects, wherein the vibration isolating member is internally provided in the guide member, and the vibration isolating member is provided in the guide member. At least a part of which is disposed in the third passage.

請求項１３記載の膨張弁は、請求項１乃至請求項１２のいずれかに記載の膨張弁において、前記オリフィス部の外周にはシール溝が形成され、該シール溝にはリングシールが装着されていることを特徴とする。 An expansion valve according to a thirteenth aspect is the expansion valve according to any one of the first to twelfth aspects, wherein a seal groove is formed on an outer periphery of the orifice portion, and a ring seal is attached to the seal groove. It is characterized by being.

請求項１４記載の膨張弁は、請求項１乃至請求項１３のいずれかに記載の膨張弁において、前記開口部は、前記第３の通路に連通するとともに上端が前記駆動装置を取付けるための駆動装置取付穴とされ、該駆動装置取付穴の内周には環状凹溝とめねじ部が形成され、前記駆動装置は前記駆動装置取付穴に固定されるキャン体を有し、該キャン体には前記駆動装置取付穴に嵌合する筒状の取付座が一体に形成され、該取付座の外周には前記めねじ部に螺合するおねじ部が形成され、前記環状凹溝には前記取付座の外周面に密着するシール部材が配置されていることを特徴とする。 The expansion valve according to claim 14 is the expansion valve according to any one of claims 1 to 13 , wherein the opening communicates with the third passage and an upper end is a drive for mounting the drive device. An annular groove and a female thread portion are formed on the inner periphery of the drive device mounting hole, and the drive device has a can body fixed to the drive device mounting hole. A cylindrical mounting seat that fits into the drive device mounting hole is integrally formed, and a male thread portion that is screwed into the female thread portion is formed on an outer periphery of the mounting seat, and the mounting groove is formed in the annular groove. A seal member that is in close contact with the outer peripheral surface of the seat is disposed.

請求項１５記載の膨張弁は、請求項１４記載の膨張弁において、前記シール部材はＯリングであることを特徴とする。
また、請求項１６記載の膨張弁は、請求項１４記載の膨張弁において、前記キャン体内には、前記蒸発器から送出される冷媒の温度を感知して変位するダイアフラムと該ダイアフラムの変位を前記作動棒に伝達するストッパ部材が装備され、前記作動棒の一方の端部が前記ストッパ部材に接続されるとともに前記作動棒の他方の端部の先端が前記弁体に当接されることを特徴とする。 The expansion valve according to claim 15 is the expansion valve according to claim 14 , wherein the seal member is an O-ring.
An expansion valve according to a sixteenth aspect is the expansion valve according to the fourteenth aspect , wherein the can body includes a diaphragm that senses and displaces a temperature of a refrigerant delivered from the evaporator, and a displacement of the diaphragm. A stopper member for transmitting to the operating rod is provided, and one end of the operating rod is connected to the stopper member, and the tip of the other end of the operating rod is in contact with the valve body. And

本発明の膨張弁は、以上のように、膨張弁の弁本体に対して、パワーエレメントを取り付ける開口部側から、内径寸法が順次小さくなる開口部を形成し、先端部を有底穴としたものである。
そして、この開口部に弁体やオリフィス部を一体に有するガイド部材を圧入或いは嵌合して作動棒を案内させ、冷媒の高圧側と低圧側の絞り部を区画する構成としたものである。
この構成により、膨張弁の部品点数を削減し組立工数を減ずることができ、また、オリフィス部を一体に有するガイド部材を圧入或いは嵌合し、且つ、カシメ固定することで、ガイド部材の位置決めと共に冷媒の漏れを防止することができる。 As described above, the expansion valve of the present invention forms an opening having a smaller inner diameter dimension from the opening side where the power element is attached to the valve body of the expansion valve, and has a bottomed hole at the tip. Is.
Then, a guide member integrally having a valve body and an orifice portion is press-fitted or fitted into the opening portion to guide the operating rod, and the high pressure side and the low pressure side throttle portion of the refrigerant are partitioned.
With this configuration, the number of parts of the expansion valve can be reduced and the number of assembling steps can be reduced, and the guide member having the orifice part integrally can be press-fitted or fitted and fixed by caulking, thereby positioning the guide member. Leakage of the refrigerant can be prevented.

また、防振部材の配置により、冷媒の圧力変動に伴う膨張弁の弁体振動を抑制することで、弁機能を安定させることができると共に、防振部材は簡単な構成であることから、加工が簡単で弁本体への装着も容易であり、取り扱い易く有用性の高い膨張弁を実現できる。 In addition, by disposing the vibration isolating member, it is possible to stabilize the valve function by suppressing the vibration of the expansion valve accompanying the pressure fluctuation of the refrigerant, and the vibration isolating member has a simple configuration. Is easy to mount on the valve body, and an expansion valve that is easy to handle and highly useful can be realized.

また、リング部材の防振バネを作動棒に点接触するように当接・支持させるから、作動棒が仮に多少傾斜することがあっても、円滑な支持状態が保持される。 In addition, since the vibration isolating spring of the ring member is abutted and supported so as to make point contact with the operating rod, a smooth support state is maintained even if the operating rod is slightly inclined.

また、ガイド部材を圧入する段付穴と蒸発器等への取付穴との間隔（肉厚）を確保することで、弁本体の腐食を発生させず、冷媒の漏れの惧れのない膨張弁とすることができる。 In addition, by securing the distance (thickness) between the stepped hole for press-fitting the guide member and the mounting hole for the evaporator, etc., the valve body does not corrode and there is no risk of refrigerant leakage It can be.

さらに、駆動装置のキャン体の取付座のおねじ部を弁本体の駆動装置取付穴のめねじ部に螺合させることにより、駆動装置が弁本体の駆動装置取付穴に取り付けられ、シール部材が駆動装置のキャン体の取付座の外周に密接し、弁本体の駆動装置取付穴の内周と駆動装置のキャン体の取付座の外周との間からの冷媒の漏れをシール部材により防止することができ、駆動装置のキャン体の取付座のおねじ部を弁本体の駆動装置取付穴のめねじ部に対して締め付ける方向または緩める方向に回転させることで、作動棒を駆動装置と共に上下方向に移動させることができ、駆動装置のキャン体の取付座のおねじ部の弁本体の駆動装置取付穴のめねじ部へのねじ込み量で、弁体が開き始めるセット値の微調整を行うことができる。 Further, by screwing the male thread portion of the mounting seat of the can body of the driving device to the female screw portion of the driving device mounting hole of the valve body, the driving device is attached to the driving device mounting hole of the valve body, and the seal member is A seal member prevents the leakage of refrigerant from the inner periphery of the drive device mounting hole of the valve body and the outer periphery of the drive device mounting body seat of the drive device, in close contact with the outer periphery of the drive device mounting body seat. The operating rod can be moved up and down together with the drive device by rotating the male thread of the mounting seat of the can body of the drive device in the tightening or loosening direction with respect to the female screw portion of the drive device mounting hole of the valve body. It can be moved, and the set value at which the valve body begins to open can be finely adjusted by the amount of screwing of the male thread part of the mounting seat of the can body of the driving device into the female thread part of the driving device mounting hole of the valve body it can.

以下、本発明の実施例を説明する。 Examples of the present invention will be described below.

図１は、本発明の実施例１の膨張弁の断面図、図２は、図１の右側面図、図３は、図１のガイド部材の拡大断面図、図４は、図１の要部の拡大断面図、図５は、図１のガイド部材の他の実施例の正面図（Ａ）及び断面図（Ｂ）、図６は、図１のガイド部材の更なる他の実施例の正面図（Ａ）及び断面図（Ｂ）である。 1 is a cross-sectional view of an expansion valve according to a first embodiment of the present invention, FIG. 2 is a right side view of FIG. 1, FIG. 3 is an enlarged cross-sectional view of a guide member of FIG. 1, and FIG. FIG. 5 is a front view (A) and a sectional view (B) of another embodiment of the guide member of FIG. 1, and FIG. 6 is a further embodiment of the guide member of FIG. It is a front view (A) and sectional drawing (B).

全体を符号１で示す膨張弁は、アルミ合金等でつくられる外面が角柱形状で中心部に円孔を有する弁本体１０を有し、弁本体１０には、高圧の冷媒が流入する第１の通路２０が設けられる。
第１の通路２０は、有底２２ａの弁室２２に連通し、弁室２２の開口部にガイド部材１００と一体に形成されたオリフィス部４０が圧入固着される。
また、弁室２２内には、球状の弁体３０が支持部材３２に溶接により取り付けられて配置され、支持部材３２は、スプリング３４により弁体３０を常時オリフィス部４０に向けて付勢する。 The expansion valve generally indicated by reference numeral 1 has a valve body 10 having an outer surface made of an aluminum alloy or the like and having a prismatic shape and a circular hole in the center, and a high-pressure refrigerant flows into the valve body 10. A passage 20 is provided.
The first passage 20 communicates with the valve chamber 22 of the bottomed 22 a, and an orifice portion 40 formed integrally with the guide member 100 is press-fitted and fixed to the opening of the valve chamber 22.
A spherical valve body 30 is disposed in the valve chamber 22 by being welded to a support member 32, and the support member 32 constantly biases the valve body 30 toward the orifice portion 40 by a spring 34.

弁本体１０に設けられる筒状のガイド部材１００は、図３に示すように、その軸芯部に作動棒孔１０１が形成されるガイド部１０２と、その外周部には段部１１０を有し、該段部１１０を介して一体に形成された円柱状の径大部１２１と、弁本体１０に対してガイド部１０２の通路４３を介して一体に形成されたオリフィス部４０とからなり、図１，４に示すように、弁本体１０に形成された段部１３と、ガイド部材１００の段部１１０とが面接触により当接し、ガイド部材１００は正確に位置決めされて固着され、かかる段部１１０と段部１３との面接触によりシール性が確保される。
なお、ガイド部材１００の内径部に、リング状のシール部材（図示せず）を挿入し、第２の通路２４と第３の通路２６との間の冷媒の通過をシールしても良い。 As shown in FIG. 3, the cylindrical guide member 100 provided in the valve body 10 has a guide portion 102 in which an operating rod hole 101 is formed in an axial center portion thereof, and a step portion 110 in an outer peripheral portion thereof. The cylindrical large-diameter portion 121 formed integrally with the step portion 110 and the orifice portion 40 formed integrally with the valve body 10 via the passage 43 of the guide portion 102, 1 and 4, the step portion 13 formed on the valve body 10 and the step portion 110 of the guide member 100 are brought into contact with each other by surface contact, and the guide member 100 is accurately positioned and fixed. Sealability is ensured by surface contact between 110 and the stepped portion 13.
Note that a ring-shaped seal member (not shown) may be inserted into the inner diameter portion of the guide member 100 to seal the passage of the refrigerant between the second passage 24 and the third passage 26.

また、図１，４に示すように、第２の通路２４に連通するガイド部材１００の下部に形成された通路４３を介して形成されるオリフィス部４０は、中央部に上記弁室２２と上記通路４３とを連通させる絞り部４２を有し、弁体３０との間で冷媒の流路を形成する。
オリフィス部４０を通過した冷媒は、通路４３を経て第２の通路２４から図示しない蒸発器側へ送り出される。
蒸発器から戻る冷媒は、第３の通路２６を通って図示しない圧縮機側へ送られる。 As shown in FIGS. 1 and 4, the orifice portion 40 formed through the passage 43 formed in the lower portion of the guide member 100 communicating with the second passage 24 has the valve chamber 22 and the above-described portion in the central portion. A throttle portion 42 that communicates with the passage 43 is provided, and a refrigerant flow path is formed between the valve body 30 and the valve body 30.
The refrigerant that has passed through the orifice portion 40 is sent out from the second passage 24 to the evaporator (not shown) through the passage 43.
The refrigerant returning from the evaporator is sent to the compressor side (not shown) through the third passage 26.

ガイド部１０２の上部には、図３又は図４に示すように、段付穴１４内に配置される径大部１２１が形成され、その径大孔部１２０に防振部材５０が配置されて作動棒６０に装着され、作動棒６０の振動を防止する。
更に、径大部１２１に連続して円柱状のガイド部１０２が形成され、その中心部に作動棒６０が摺動自在に案内され、オリフィス部４０の下部周部には下端部外周が径小となる案内部４４が形成されている。
かかる構成のガイド部材１００のガイド部１０２側が弁本体１０にカシメ固定される。
即ち、ガイド部材１００の上端部となる径大部の端部１２２は、弁本体１０側に形成されるカシメ部１１（図４参照）により弁本体１０にカシメ固定される。
したがって、本実施例のガイド部材１００は弁本体１０によりカシメ固定されると共に、ガイド部材１００のオリフィス部４０は圧入により弁本体１０に固定されるので、ガイド部材１００は弁本体１０に確実に固定される。
しかも、オリフィス部４０は圧入されることにより、シール性を確保して固定されるのである。 As shown in FIG. 3 or FIG. 4, a large diameter portion 121 disposed in the stepped hole 14 is formed on the upper portion of the guide portion 102, and the vibration isolation member 50 is disposed in the large diameter hole portion 120. It is attached to the operating rod 60 and prevents the operating rod 60 from vibrating.
Further, a cylindrical guide portion 102 is formed continuously with the large-diameter portion 121, the operating rod 60 is slidably guided at the center thereof, and the outer periphery of the lower end of the orifice portion 40 has a small diameter. A guide portion 44 is formed.
The guide member 102 side of the guide member 100 having such a configuration is caulked and fixed to the valve body 10.
That is, the large-diameter end 122 serving as the upper end of the guide member 100 is caulked and fixed to the valve main body 10 by the caulking portion 11 (see FIG. 4) formed on the valve main body 10 side.
Therefore, the guide member 100 of the present embodiment is fixed by crimping with the valve body 10 and the orifice portion 40 of the guide member 100 is fixed to the valve body 10 by press-fitting, so that the guide member 100 is securely fixed to the valve body 10. Is done.
In addition, the orifice portion 40 is fixed with a sealing property secured by being press-fitted.

さらに、ガイド部材１００は、その段部１１０により弁本体１０に面接触により当接するので、段部１１０はガイド部材１００の固定の際の位置決め部として作用すると共に、その面接触によりシール性を確実に確保することができる。
これにより、第２の通路２４より第３の通路２６への冷媒の漏れを防止することが可能となる。
かくして、第１の通路２０より第２の通路２４への冷媒の漏れ及び第２の通路２４から第３の通路２６への冷媒の漏れを防止することができる。
なお、オリフィス部４０の径小となる案内部４４は円板部４５の円縁部と一体に立設されて形成された壁部４４’により構成され、壁部４４’に連続する平坦部４６及び傾斜部４７が絞り部４２に接続されている。
この傾斜部４７に弁体３０が配置されて絞り部４２に対向して設けられる。 Further, since the guide member 100 abuts the valve body 10 by surface contact by the step portion 110, the step portion 110 acts as a positioning portion when the guide member 100 is fixed, and the surface contact ensures sealing performance. Can be secured.
Thereby, it is possible to prevent the refrigerant from leaking from the second passage 24 to the third passage 26.
Thus, the refrigerant leakage from the first passage 20 to the second passage 24 and the refrigerant leakage from the second passage 24 to the third passage 26 can be prevented.
Note that the guide portion 44 having a small diameter of the orifice portion 40 is constituted by a wall portion 44 ′ formed so as to stand integrally with a circular edge portion of the disc portion 45, and a flat portion 46 continuous with the wall portion 44 ′. The inclined portion 47 is connected to the aperture portion 42.
The valve body 30 is disposed on the inclined portion 47 and is provided to face the throttle portion 42.

なお、図５に示すように、上記ガイド部材１００下部のオリフィス部４０’は、他の実施例として、案内部４４（図３参照）を形成しない形状として、上下長さを短くしてガイド部材１００の加工を簡略化しても良い。
また、更に他の実施例として、図６（Ａ），（Ｂ）に示すように、ガイド部材１００において、オリフィス部材４０”を別部材として、取扱性を向上させても良い。
また、このようにガイド部材１００に対して、オリフィス部材４０”を別部材とすると、その弁本体１０に対する装着は、先ず、開口部１２からオリフィス部材４０”を装着後、ガイド部材１００を装着することになる。 As shown in FIG. 5, the orifice portion 40 ′ below the guide member 100 has a shape in which the guide portion 44 (see FIG. 3) is not formed as another embodiment, and the guide member is shortened in the vertical length. The processing of 100 may be simplified.
As still another embodiment, as shown in FIGS. 6A and 6B, in the guide member 100, the orifice member 40 ″ may be used as a separate member to improve the handleability.
Further, when the orifice member 40 ″ is a separate member with respect to the guide member 100 in this way, the valve member 10 is first mounted after the orifice member 40 ″ is mounted from the opening 12 and then the guide member 100 is mounted. It will be.

図１に示すように、弁本体１０の弁室２２の反対側の端部には、パワーエレメントと称する弁体３０の駆動装置７０が取り付けられる。
パワーエレメント７０は、上蓋７２ａと下蓋７２ｂが一体に溶接されたキャン体７２を有し、上蓋７２ａと下蓋７２ｂの間には、ダイアフラム８０が挟み込まれる。
キャン体７２は、ねじ部７４で弁本体１０に固着され、シール部材７６でシールされる。
ダイアフラム８０と上蓋７２ａとの間には、圧力室８２が形成され、作動流体が充填されて、栓体８４により封止される。 As shown in FIG. 1, a drive device 70 of a valve body 30 called a power element is attached to an end of the valve body 10 on the opposite side of the valve chamber 22.
The power element 70 has a can body 72 in which an upper lid 72a and a lower lid 72b are integrally welded, and a diaphragm 80 is sandwiched between the upper lid 72a and the lower lid 72b.
The can body 72 is fixed to the valve body 10 with a screw portion 74 and sealed with a seal member 76.
A pressure chamber 82 is formed between the diaphragm 80 and the upper lid 72a, filled with a working fluid, and sealed with a plug 84.

ダイアフラム８０の圧力室８２の反対側には、ストッパ部材９０が配接される。
第３の通路２６の冷媒は開口部１２を介してストッパ部材９０の裏面に導入される。
ストッパ部材９０は、ダイアフラム８０の変位に追従して摺動する。
ストッパ部材９０は、作動棒６０を保持し、作動棒６０の先端は弁体３０に当接する。
ダイアフラム８０の変位は、作動棒６０を介して弁体３０を駆動し、オリフィス部４０との間の流路面積を制御する。 A stopper member 90 is disposed on the opposite side of the diaphragm 80 from the pressure chamber 82.
The refrigerant in the third passage 26 is introduced into the back surface of the stopper member 90 through the opening 12.
The stopper member 90 slides following the displacement of the diaphragm 80.
The stopper member 90 holds the operating rod 60, and the tip of the operating rod 60 contacts the valve body 30.
The displacement of the diaphragm 80 drives the valve body 30 via the operating rod 60 and controls the flow path area between the orifice portion 40 and the valve body 30.

以上の実施例の説明においては、ガイド部材１００のオリフィス部４０を圧入により固定し、ガイド部材１００をカシメ固定する場合について述べたが、本発明はこれに限らず、ガイド部材２００のオリフィス部２４０を弁本体１０に当接することによりシール性を確保しても良いのは勿論である。
図７は、オリフィス部を弁本体に当接する他の実施例の要部であるガイド部材２００の断面図を示している。
図７において、弁本体１０に段部１５が形成され、ガイド部材２００のオリフィス部２４０が上記段部１５に面接触して当接されシール性が確保される。 In the above description of the embodiment, the case where the orifice portion 40 of the guide member 100 is fixed by press-fitting and the guide member 100 is fixed by caulking is described, but the present invention is not limited to this, and the orifice portion 240 of the guide member 200 is fixed. Of course, sealing performance may be secured by contacting the valve body 10 with the valve.
FIG. 7 shows a cross-sectional view of a guide member 200 which is a main part of another embodiment in which the orifice part is brought into contact with the valve body.
In FIG. 7, a step portion 15 is formed in the valve body 10, and the orifice portion 240 of the guide member 200 is brought into surface contact with the step portion 15 to ensure sealing performance.

即ち、ガイド部材２００と一体に形成されるオリフィス部２４０は中央に絞り部２４２が形成された円盤部２４５と該円盤部２４５の周縁から下方に立設されて円盤部２４５と一体に形成された壁部２４４とからなり、その壁部２４４が弁本体１０の弁室２２の開口部に所定のクリアランスをもって配置されており、該壁部２４４の端部２４４ｂが段部１５に面接触にて当接して位置決め部を構成している。 That is, the orifice part 240 formed integrally with the guide member 200 is formed integrally with the disk part 245 so as to stand downward from the periphery of the disk part 245 having a throttle part 242 formed at the center. The wall portion 244 is disposed at the opening of the valve chamber 22 of the valve body 10 with a predetermined clearance, and the end portion 244b of the wall portion 244 contacts the step portion 15 by surface contact. The positioning part is formed in contact.

さらに、オリフィス部２４０と一体に形成されてガイド部材２００を構成するガイド部２０２は弁本体１０に設けられたカシメ部１１によりカシメ固定される。
カシメ固定は、ガイド部２０２の端部２２２をカシメ部１１により行われる。
かくして、ガイド部材２００は位置決め部２４４ｂにより位置決めされ、弁本体１０に固定される。
かかる構成により、位置決め部２４４ｂによりシール性が確保され、第１の通路２０に導入される高圧の冷媒の第２の通路２４側への漏れが生じる場合があっても、その漏れは位置決め部２４４ｂにより防止されることとなる。 Further, the guide portion 202 that is formed integrally with the orifice portion 240 and constitutes the guide member 200 is fixed by crimping by the crimping portion 11 provided in the valve body 10.
The caulking is performed by the caulking portion 11 at the end 222 of the guide portion 202.
Thus, the guide member 200 is positioned by the positioning portion 244b and fixed to the valve body 10.
With this configuration, even if the sealing portion is secured by the positioning portion 244b and the high-pressure refrigerant introduced into the first passage 20 may leak to the second passage 24 side, the leakage is caused by the positioning portion 244b. Will be prevented.

また、オリフィス部２４０においては、壁部２４４と円盤部２４５の絞り部２４２とが平坦部２４６及び傾斜部２４７で接続されており、この傾斜部２４７に弁体３０が絞り部２４２に対向するように配置されている。
さらに、上述した漏れは、ガイド部２０２を弁本体１０のカシメ部１１により弁本体１０にカシメ固定することにより防止することができるのは勿論である。
したがって、本実施例によれば、第１の通路２０より第２の通路２４への冷媒の漏れ及び第２の通路２４から第３の通路２６への冷媒の漏れを防止することができる。
なお、ガイド部２０２の径大孔部２２０の内部には、図３の実施例と同様に防振部材５０が配置され、作動棒６０に装着されることにより作動棒６０に振動が生ずることを防止する。 Further, in the orifice part 240, the wall part 244 and the throttle part 242 of the disk part 245 are connected by the flat part 246 and the inclined part 247, and the valve body 30 is opposed to the throttle part 242 on the inclined part 247. Is arranged.
Furthermore, it is needless to say that the leakage described above can be prevented by caulking and fixing the guide portion 202 to the valve body 10 by the caulking portion 11 of the valve body 10.
Therefore, according to the present embodiment, it is possible to prevent the refrigerant from leaking from the first passage 20 to the second passage 24 and the refrigerant from the second passage 24 to the third passage 26.
It should be noted that the vibration isolating member 50 is disposed inside the large diameter hole portion 220 of the guide portion 202 in the same manner as the embodiment of FIG. 3, and the operation rod 60 is vibrated by being attached to the operation rod 60. To prevent.

図８は、防振部材５０の構造を示す斜視図である。
防振部材５０は、弾性の高い金属板を円形に湾曲させたリング部５２と、リング部５２に切り欠きをつけて内側に折り曲げて形成する防振バネ５４を有する。
リング部５２の両端部５２ａ，５２ｂは互いに重合する構造に作られており、リング部５２の直径を縮めた状態で、ガイド部材１００の径大孔部１２０の内径部に挿入し直径が復元する弾性力を利用して、防振部材５０をガイド部材１００の内側に位置決めすることができる。
防振バネ５４は、棒状の作動棒６０の外周部に当接し、弁体３０の振動を抑制する。
なお、この実施例にあっては、３本の防振バネ５４を設けてあるが、４本の防振バネを設けることもできる。 FIG. 8 is a perspective view showing the structure of the vibration isolation member 50.
The vibration isolation member 50 includes a ring portion 52 obtained by bending a highly elastic metal plate into a circular shape, and a vibration isolation spring 54 formed by notching the ring portion 52 and bending it inward.
Both ends 52a and 52b of the ring part 52 are made to overlap each other, and with the diameter of the ring part 52 reduced, the ring part 52 is inserted into the inner diameter part of the large-diameter hole part 120 of the guide member 100 to restore the diameter. The vibration isolation member 50 can be positioned inside the guide member 100 by using the elastic force.
The anti-vibration spring 54 abuts on the outer peripheral portion of the rod-shaped operating rod 60 and suppresses vibration of the valve body 30.
In this embodiment, three anti-vibration springs 54 are provided, but four anti-vibration springs may be provided.

次に、この膨張弁の組立手順を説明する。
まず、弁本体１０のパワーエレメント７０を取り付ける側の開口部１２を介して有底の弁室２２内に、スプリング３４と弁体３０が溶接された支持部材３２を挿入する。 Next, the procedure for assembling the expansion valve will be described.
First, the support member 32 to which the spring 34 and the valve body 30 are welded is inserted into the bottomed valve chamber 22 through the opening 12 on the side where the power element 70 of the valve body 10 is attached.

次に、防振部材５０が取付けられ、且つ、作動棒６０が挿入されたガイド部材１００を開口部１２から挿入し、弁本体１０の段付穴１４に圧入する。
ガイド部材１００は、段部１１０により軸方向に位置決めされ、カシメ加工（カシメ部１１）が施されて固着される。 Next, the guide member 100 to which the vibration isolating member 50 is attached and the operating rod 60 is inserted is inserted from the opening 12 and press-fitted into the stepped hole 14 of the valve body 10.
The guide member 100 is positioned in the axial direction by the stepped portion 110, and is subjected to crimping (caulking portion 11) to be fixed.

最後に、パワーエレメント７０の組立体をねじ部７４により弁本体１０に螺合して、膨張弁１の組立を完了する。 Finally, the assembly of the power element 70 is screwed into the valve main body 10 by the screw portion 74 to complete the assembly of the expansion valve 1.

次に、実施例２について、図９〜１０を参照して説明する。
図９は、実施例２の防振部材の斜視図、図１０は、図９の防振部材のガイド部材に装着した状態を示す斜視図、図１１は、図９の防振部材に作動棒を装着した状態を示す平面図である。
図１１に示すように、防振部材としての図９及び図１０に示す防振部材（リング部材１５０）を作動棒６０の支持のために適用したものである。
実施例２の防振部材は、図９に示すように、１つの円環状のリング部１５２と、該リング部１５２の一側に配置させた板体状の３枚の防振バネ１５４とから構成されるリング部材１５０から構成されている。
また、リング部材１５０は、実施例１と同様に、リング部１５２を形成する板体の端部に交差部を形成するもので、この交差部として、リング部１５２の両端部から、幅の狭い舌片１５２ａ，１５２ｂをリング部１５２と同一曲率で延設する。
なお、防振バネ１５４の形状・素材及び数は、実施例１の場合と同様である。 Next, Example 2 will be described with reference to FIGS.
9 is a perspective view of the vibration isolating member of the second embodiment, FIG. 10 is a perspective view showing a state in which the vibration isolating member of FIG. 9 is attached to the guide member, and FIG. It is a top view which shows the state which mounted | wore.
As shown in FIG. 11, the anti-vibration member (ring member 150) shown in FIGS. 9 and 10 as an anti-vibration member is applied to support the operating rod 60.
As shown in FIG. 9, the vibration isolating member of the second embodiment includes one annular ring portion 152 and three plate-shaped vibration isolating springs 154 disposed on one side of the ring portion 152. The ring member 150 is configured.
Similarly to the first embodiment, the ring member 150 forms an intersecting portion at the end of the plate member forming the ring portion 152. As the intersecting portion, the ring member 150 has a narrow width from both end portions of the ring portion 152. The tongue pieces 152 a and 152 b are extended with the same curvature as the ring portion 152.
The shape, material, and number of the anti-vibration springs 154 are the same as those in the first embodiment.

かかる構成のリング部材１５０によれば、リング部材１５０がガイド部材１００に装着された状態において、作動棒６０は、図１１に示すように、その周囲を３個所にて防振バネ１５４により支持され、リング部１５２は弁体３０の防振部材として作用することとなる。
したがって、冷凍サイクル内に冷媒圧力の圧力変動が生じても、弁体３０の動作を安定させることができ、冷媒流量の正確な制御と作動棒６０の振動により生じる騒音の発生を防止することができる。 According to the ring member 150 having such a configuration, when the ring member 150 is mounted on the guide member 100, the operating rod 60 is supported by the anti-vibration springs 154 at three locations around the operation rod 60 as shown in FIG. The ring portion 152 acts as a vibration isolating member for the valve body 30.
Therefore, even if refrigerant pressure fluctuations occur in the refrigeration cycle, the operation of the valve body 30 can be stabilized, and accurate control of the refrigerant flow rate and generation of noise caused by vibration of the operating rod 60 can be prevented. it can.

なお、上記実施例において、防振バネ１５４は、全幅において、同一幅に形成したが、その他の形状でも良く、例えば、先端部が頂点となる三角形状とすることで、弾性度を調整するようにしても良いのは勿論である。 In the above-described embodiment, the anti-vibration springs 154 are formed to have the same width in the entire width, but other shapes may be used. For example, the elasticity may be adjusted by making the tip end a triangular shape. Of course, it is okay.

次に、実施例３について図１２乃至図１５を用いて説明する。
図１２は、実施例３の防振部材の斜視図、図１３は、図１１の防振部材のガイド部材に装着した状態の斜視図、図１４は、図１２の防振部材の部分説明図（Ａ）及び要部側面図（Ｂ）、図１５は、図１２の防振部材に作動棒を装着した状態を示す平面図である。
この実施例３は、図１２乃至図１４に示す防振部材（リング部材２５０）を、実施例１，２と同様に作動棒６０の支持のために適用するものである。
そして、この作動棒６０は、実施例１，２と同様に、図１に示すように、パワーエレメント７０に駆動される。 Next, Embodiment 3 will be described with reference to FIGS.
12 is a perspective view of the vibration isolating member of the third embodiment, FIG. 13 is a perspective view of the vibration isolating member attached to the guide member of the vibration isolating member of FIG. 11, and FIG. 14 is a partial explanatory view of the vibration isolating member of FIG. FIG. 15A is a plan view showing a state in which an operating rod is attached to the vibration isolating member of FIG.
In the third embodiment, the vibration isolating member (ring member 250) shown in FIGS. 12 to 14 is applied to support the operating rod 60 as in the first and second embodiments.
The operating rod 60 is driven by the power element 70 as shown in FIG.

また、リング部材２５０は、実施例１，２と同様に、図１５に示すガイド部材１００に形成された径大部１２０内に嵌合される。
この径大部１２０の内壁にリング部材２５０のリング部２５２が弾接・装着される。
実施例３のリング部材２５０は、図１２乃至図１５に示すように、リング部２５２の内面に形成された平板状の３枚の防振バネ２５４の先端部に半球状の球面部２５６が形成され、該球面部２５６が作動棒６０の側面に点接触して当接・支持することになる。
また、図１２乃至図１４に示すように、前記リング部２５２には、その長さ方向に沿って切欠き部５６が形成される。
なお、リング部２５２の両端部２５２ａ，２５２ｂは互いに重合する構造に作られており、リング部２５２の直径を縮めた状態で、ガイド部材１００の径大部１２０の内径部に挿入し直径が復元する弾性力を利用して、防振部材２５０をガイド部材１００の内側に位置決めすることができる。 Further, the ring member 250 is fitted in the large diameter portion 120 formed in the guide member 100 shown in FIG.
The ring portion 252 of the ring member 250 is elastically contacted and attached to the inner wall of the large diameter portion 120.
As shown in FIGS. 12 to 15, in the ring member 250 of the third embodiment, a hemispherical spherical portion 256 is formed at the tip of three flat vibration-proof springs 254 formed on the inner surface of the ring portion 252. Then, the spherical surface portion 256 comes into point contact with and supports the side surface of the operating rod 60.
As shown in FIGS. 12 to 14, the ring portion 252 is formed with a notch 56 along the length direction thereof.
In addition, both ends 252a and 252b of the ring portion 252 are made to overlap each other, and with the diameter of the ring portion 252 reduced, it is inserted into the inner diameter portion of the large diameter portion 120 of the guide member 100 to restore the diameter The anti-vibration member 250 can be positioned inside the guide member 100 by using the elastic force to be applied.

したがって、実施例３によれば、作動棒６０はその周囲を３個所にて、３枚の防振バネ２５４の先端部に形成されている半球状の球面部２５６が作動棒６０の側面に点接触して当接・支持されるから、リング部材２５０は作動棒６０の防振部材として作用することとなり、冷凍サイクル内に冷媒圧力の変動が生じても、弁体３０の動作を安定にすることができ、冷媒流量の正確な制御と弁体３０の振動により生じる騒音の発生を防止することができる。 Therefore, according to the third embodiment, the hemispherical spherical portion 256 formed at the tip of the three anti-vibration springs 254 is dotted on the side surface of the actuating rod 60 at three places around the actuating rod 60. Since the ring member 250 acts as a vibration isolating member for the operating rod 60 because it is in contact with and supported by contact, the operation of the valve body 30 is stabilized even if the refrigerant pressure fluctuates in the refrigeration cycle. Therefore, it is possible to prevent generation of noise caused by accurate control of the refrigerant flow rate and vibration of the valve body 30.

また、実施例３によれば、実施例１，２と同様にリング部材２５０を冷媒の流路から離れた作動棒６０の部分に配置させたことから、リング部材２５０が冷媒の流動抵抗とならず、また、リング部材２５０自体が冷媒の流れによる振動や騒音を発生するおそれがない。
また、図１５に示すように、リング部材２５０の防振バネ２５４は作動棒６０に対して点接触しているから、作動棒６０が仮に多少傾斜することがあっても、円滑な支持状態が保持される。 Further, according to the third embodiment, since the ring member 250 is disposed in the portion of the operating rod 60 away from the refrigerant flow path as in the first and second embodiments, the ring member 250 becomes the flow resistance of the refrigerant. In addition, the ring member 250 itself is free from vibration and noise caused by the flow of the refrigerant.
Further, as shown in FIG. 15, since the vibration isolating spring 254 of the ring member 250 is in point contact with the operating rod 60, even if the operating rod 60 is slightly inclined, a smooth support state is obtained. Retained.

次に、実施例４について図１６及び図１７を用いて説明する。
図１６は、実施例４のリング部材の部分説明図（Ａ）及び要部側面図（Ｂ）、図１７は、図１６のリング部材に作動棒を装着した状態を示す平面図である。
なお、図１６（Ｂ）は、図１６（Ａ）の矢印方向から観た図である。 Next, Example 4 will be described with reference to FIGS. 16 and 17.
FIG. 16 is a partial explanatory view (A) and a main part side view (B) of the ring member of the fourth embodiment, and FIG. 17 is a plan view showing a state in which an operating rod is mounted on the ring member of FIG.
Note that FIG. 16B is a diagram viewed from the direction of the arrow in FIG.

実施例４は、実施例３の変形であり、図１６及び図１７に示す防振部材（リング部材３５０）を、実施例１乃至実施例３と同様に、図１５に示すガイド部材１００に形成された径大部１２０内に嵌合される。
リング部材３５０は、リング部３５２と一体の３枚の防振バネ３５４がその内側に形成され、その先端部が同一方向にくの字形に折り曲げられると共に、その先端部には円筒周面形状の曲面突条部３５６が形成され、該曲面突条部３５６が作動棒６０の周面に点接触して支持することになる。 The fourth embodiment is a modification of the third embodiment, and the vibration isolation member (ring member 350) illustrated in FIGS. 16 and 17 is formed on the guide member 100 illustrated in FIG. 15 in the same manner as the first to third embodiments. The large diameter portion 120 is fitted.
In the ring member 350, three vibration-proof springs 354 integral with the ring portion 352 are formed on the inner side thereof, and the tip end portion thereof is bent into a dogleg shape in the same direction, and the tip end portion has a cylindrical circumferential shape. A curved ridge portion 356 is formed, and the curved ridge portion 356 is supported in point contact with the peripheral surface of the operating rod 60.

上記構成により、リング部材３５０は作動棒６０を介して弁体３０の防振部材として作用することとなり、冷凍サイクル内に冷媒圧力の変動が生じても、弁体３０の動作を安定にすることができ、冷媒流量の正確な制御と弁体３０の振動により生じる騒音の発生を防止することができる。 With the above configuration, the ring member 350 acts as a vibration isolating member for the valve body 30 via the operating rod 60, and the operation of the valve body 30 can be stabilized even if the refrigerant pressure fluctuates in the refrigeration cycle. Therefore, it is possible to prevent generation of noise caused by accurate control of the refrigerant flow rate and vibration of the valve body 30.

また、実施例４によれば、他の実施例と同様に、リング部材３５０を冷媒の流路から離れた作動棒６０の部分に配置させたことから、リング部材３５０が冷媒の流動抵抗とならず、また、リング部材３５０自体が冷媒の流れにより振動や騒音を発生するおそれがない。
また、リング部材３５０の防振バネ３５４は作動棒６０に対して点接触しているから、作動棒６０が仮に多少傾斜することがあっても、或いは、防振バネ３５４が弾性変形することがあっても円滑に支持状態が保持される。 Further, according to the fourth embodiment, as in the other embodiments, the ring member 350 is arranged in the portion of the operating rod 60 away from the refrigerant flow path, so that the ring member 350 has the flow resistance of the refrigerant. In addition, the ring member 350 itself is free from vibration and noise due to the flow of the refrigerant.
Further, since the vibration isolating spring 354 of the ring member 350 is in point contact with the actuating rod 60, even if the actuating rod 60 may be slightly inclined, or the vibration isolating spring 354 may be elastically deformed. Even if it exists, a support state is maintained smoothly.

次に、実施例５について図１８及び図１９を用いて説明する。
図１８は、実施例５のリング部材の部分説明図（Ａ）及び要部側面図（Ｂ）、図１９は、図１８のリング部材に作動棒を装着した状態を示す平面図である。
なお、図１８（Ｂ）は、図１８（Ａ）の矢印方向から観た図である。
実施例５は、実施例４の変形であり、防振部材（リング部材４５０）を、実施例４と同様に作動棒６０の支持のために適用するものである。 Next, Example 5 will be described with reference to FIGS.
FIG. 18 is a partial explanatory view (A) and a main part side view (B) of the ring member of the fifth embodiment, and FIG. 19 is a plan view showing a state in which an operating rod is mounted on the ring member of FIG.
Note that FIG. 18B is a diagram viewed from the direction of the arrow in FIG.
The fifth embodiment is a modification of the fourth embodiment, in which a vibration isolating member (ring member 450) is applied to support the operating rod 60 as in the fourth embodiment.

リング部材４５０は、他の実施例と同様に、ガイド部材１００の径大部１２０内に嵌合・装着される。
そして、リング部材４５０は、図１８（Ａ），（Ｂ）及び図１９に示すように、リング部材４５２と一体の３枚の防振バネ４５４がその内側に形成され、その先端部が同一方向に折り曲げられると共に、その先端部には突条部４５６が形成され、該突条部４５６が作動棒６０の周面に点接触して支持することになる。 The ring member 450 is fitted and mounted in the large diameter portion 120 of the guide member 100 as in the other embodiments.
As shown in FIGS. 18A, 18B, and 19, the ring member 450 has three vibration-proof springs 454 that are integral with the ring member 452 formed on the inside thereof, and the tip portion thereof is in the same direction. In addition, a protrusion 456 is formed at the front end of the protrusion 456, and the protrusion 456 is in point contact with and supported by the peripheral surface of the operating rod 60.

上記構成により、リング部材４５０は作動棒６０を介して弁体３０の防振部材として作用することとなり、冷凍サイクル内に冷媒圧力の変動が生じても、弁体３０の動作を安定にすることができ、冷媒流量の正確な制御と弁体３０の振動により生じる騒音の発生を防止することができる。
また、実施例５によれば、他の実施例と同様の効果が期待できる。 With the above configuration, the ring member 450 acts as a vibration isolating member for the valve body 30 via the operating rod 60, and even if the refrigerant pressure fluctuates in the refrigeration cycle, the operation of the valve body 30 is stabilized. Therefore, it is possible to prevent generation of noise caused by accurate control of the refrigerant flow rate and vibration of the valve body 30.
Moreover, according to Example 5, the same effect as another Example can be anticipated.

ところで、図１に示す実施例１を採用した場合、弁本体１０に形成された径大の段付穴１４と蒸発器等への取付穴１０ａ，１０ｂ（図２１参照）とが近接して配置されることから、両穴間の肉厚が確保できないという不具合が生ずることがある。
そこで、このような問題の解決手段として発明された技術が実施例６である。
以下、実施例６について図２０及び図２１を用いて説明する。 By the way, when Example 1 shown in FIG. 1 is adopted, the large-diameter stepped hole 14 formed in the valve body 10 and the mounting holes 10a and 10b (see FIG. 21) to the evaporator and the like are arranged close to each other. Therefore, there may be a problem that the thickness between the holes cannot be secured.
Thus, the sixth embodiment is a technique invented as a solution to such a problem.
Hereinafter, Example 6 will be described with reference to FIGS.

図２０は、本発明の実施例６の膨張弁の断面図（図２１のＸ−Ｘ断面）、図２１は、図２０の右側面図である。
なお、図２０及び図２１において、実施例１と同一構成部分については、図１−４と同一符号を付すことによって、その説明を省略する。
実施例６は、リング状防振バネ５０の取付位置を図２０に示すように、第３の通路２６内に配置した点に特徴を有するものである。 20 is a cross-sectional view of the expansion valve according to the sixth embodiment of the present invention (XX cross-section of FIG. 21), and FIG. 21 is a right side view of FIG.
In FIG. 20 and FIG. 21, the same components as those in the first embodiment are denoted by the same reference numerals as those in FIG.
The sixth embodiment is characterized in that the attachment position of the ring-shaped vibration-proof spring 50 is arranged in the third passage 26 as shown in FIG.

即ち、実施例６の場合、図２０，２１に示すように、弁本体１０には、ガイド部材５００を嵌入させる径小孔部１６及び径大孔部１７（実施例１の段付穴１４に相当）が形成され、且つ、実施例１（特に図４参照）と比べて径小孔部１６の上下の長さ（高さ）が大で、径大孔部１７の上下の長さ（高さ）が小として形成される。
そして、ガイド部材５００は、その下部を構成する均一径部分を実施例１と比べて長く形成し、もって、前記ガイド部材５００を径小孔部１６及び径大孔部１７に嵌合した時に、拡大径部５２１の大部分が第３の通路２６内に位置するように形成する。
そして、この拡大径部５２１内に他の実施例同様に、防振部材５０を配置する。
この構成により、径大孔部１７は、取付穴１０ａ及び取付穴１０ｂから離れた位置に設けることができるから、防振部材５０の機能を保持させたままで、弁本体１０における径大孔部１７と取付穴１０ａ及び取付穴１０ｂとの間隔（肉厚）を確保することができる。
したがって、実施例６においても、実施例１と同様の防振効果を実現すると共に、弁本体１０の腐食を発生させず、冷媒の漏れの惧れをなくすことができる。 That is, in the case of the sixth embodiment, as shown in FIGS. 20 and 21, the valve body 10 has a small-diameter hole portion 16 and a large-diameter hole portion 17 into which the guide member 500 is fitted (the stepped hole 14 of the first embodiment And the vertical length (height) of the small-diameter hole portion 16 is larger than that of the first embodiment (see FIG. 4 in particular), and the vertical length (high) of the large-diameter hole portion 17 is high. ) Is formed as small.
And the guide member 500 is formed with a uniform diameter portion constituting the lower part longer than that of the first embodiment, and when the guide member 500 is fitted into the small diameter hole portion 16 and the large diameter hole portion 17, The enlarged diameter portion 521 is formed so that most of the enlarged diameter portion 521 is located in the third passage 26.
And the vibration isolator 50 is arrange | positioned in this enlarged diameter part 521 similarly to another Example.
With this configuration, the large-diameter hole portion 17 can be provided at a position away from the mounting hole 10a and the mounting hole 10b. Therefore, the large-diameter hole portion 17 in the valve body 10 is maintained while maintaining the function of the vibration isolating member 50. And a space (thickness) between the mounting hole 10a and the mounting hole 10b.
Therefore, in the sixth embodiment, the same vibration isolation effect as that of the first embodiment can be realized, the valve body 10 can be prevented from being corroded, and the possibility of refrigerant leakage can be eliminated.

また、図２０に示すように、ガイド部材５００の下部のオリフィス部５４０の外周に環状のシール溝５４１を形成し、このシール溝５４１にリングシール５５０を嵌合させることで、弁室２２と第２の通路２４との間のシール性を向上させることができる。 In addition, as shown in FIG. 20, an annular seal groove 541 is formed on the outer periphery of the orifice portion 540 below the guide member 500, and a ring seal 550 is fitted into the seal groove 541, so that The sealing performance between the two passages 24 can be improved.

次に、実施例７について図２２及び図２３を用いて説明する。
図２２は、本発明の実施例７の膨張弁の断面図、図２３は、図２２の右側面図である。
全体を符号１で示す膨張弁は、アルミ合金等でつくられる角柱形状の弁本体１０を有し、取付用の貫通穴２８が設けてある弁本体１０には、高圧の冷媒が流入する第１の通路２０が設けられる。
第１の通路２０は、有底の弁室２２に連通し、弁室２２の開口部にオリフィス部材６４０が圧入固着される。
弁室２２内には、球状の弁体３０が支持部材３２に溶接により取り付けられて配置され、支持部材３２は、スプリング３４により弁体３０を常時オリフィス部材６４０に向けて付勢する。 Next, Example 7 will be described with reference to FIGS.
22 is a cross-sectional view of an expansion valve according to a seventh embodiment of the present invention, and FIG. 23 is a right side view of FIG.
The expansion valve denoted as a whole by reference numeral 1 has a prismatic valve body 10 made of aluminum alloy or the like, and a high pressure refrigerant flows into the valve body 10 provided with a through hole 28 for mounting. The passage 20 is provided.
The first passage 20 communicates with the bottomed valve chamber 22, and the orifice member 640 is press-fitted and fixed to the opening of the valve chamber 22.
A spherical valve body 30 is disposed in the valve chamber 22 by welding to a support member 32, and the support member 32 constantly biases the valve body 30 toward the orifice member 640 by a spring 34.

オリフィス部材６４０は、中央部に開口部６４２を有し、弁体３０との間で冷媒の流路を形成する。
オリフィス部材６４０の内径部には防振部材６５０が嵌装されて弁体３０の振動を防止する。
オリフィス部材６４０を通過した冷媒は、第２の通路２４から蒸発器側へ送り出される。
蒸発器から戻る冷媒は、第３の通路２６を通って圧縮機側へ送られる。 The orifice member 640 has an opening 642 at the center, and forms a refrigerant flow path with the valve body 30.
A vibration isolating member 650 is fitted to the inner diameter portion of the orifice member 640 to prevent vibration of the valve body 30.
The refrigerant that has passed through the orifice member 640 is sent out from the second passage 24 to the evaporator side.
The refrigerant returning from the evaporator is sent to the compressor side through the third passage 26.

弁本体１０の弁室２２の反対側の端部には、パワーエレメントと称する弁体３０の駆動装置７０が取り付けられる。
パワーエレメント７０は、上蓋７２ａと下蓋７２ｂが一体に溶接されたキャン体７２を有し、上蓋７２ａと下蓋７２ｂの間には、ダイアフラム８０が挟み込まれる。
キャン体７２は、ねじ部７４で弁本体１０に固着され、シール部材であるＯリング６７７でシールされる。
ダイアフラム８０と上蓋７２ａとの間には、圧力室８２が形成され、作動流体が充填されて、栓体８４により封止される。 A drive device 70 of the valve body 30 called a power element is attached to the end of the valve body 10 on the opposite side of the valve chamber 22.
The power element 70 has a can body 72 in which an upper lid 72a and a lower lid 72b are integrally welded, and a diaphragm 80 is sandwiched between the upper lid 72a and the lower lid 72b.
The can body 72 is fixed to the valve body 10 with a screw portion 74 and sealed with an O-ring 677 which is a seal member.
A pressure chamber 82 is formed between the diaphragm 80 and the upper lid 72a, filled with a working fluid, and sealed with a plug 84.

ダイアフラム８０の圧力室８２の反対側には、ストッパ部材９０が配接される。
第３の通路２６の冷媒は、開口部１２を介してストッパ部材９０の裏面に導入される。
ストッパ部材９０は、ダイアフラム８０の変位に追従して摺動する。
ストッパ部材９０は、作動棒６０を保持し、作動棒６０の先端は弁体３０に当接する。
ダイアフラム８０の変位は、作動棒６０を介して弁体３０を駆動し、オリフィス部材６４０との間の流路面積を制御する。 A stopper member 90 is disposed on the opposite side of the diaphragm 80 from the pressure chamber 82.
The refrigerant in the third passage 26 is introduced to the back surface of the stopper member 90 through the opening 12.
The stopper member 90 slides following the displacement of the diaphragm 80.
The stopper member 90 holds the operating rod 60, and the tip of the operating rod 60 contacts the valve body 30.
The displacement of the diaphragm 80 drives the valve body 30 via the operating rod 60 and controls the flow path area with the orifice member 640.

弁本体１０に圧入されるガイド部材６００は、段付部６１０を有し、弁本体１０に対して正確に位置決めされて固着される。
ガイド部材６００の内径部には、リング状のシール部材６２０が挿入され、プッシュナット等の止め具６３０により固定される。
シール部材６２０は、第２の通路２４と第３の通路２６との間の冷媒の通過をシールする。 The guide member 600 press-fitted into the valve main body 10 has a stepped portion 610 and is accurately positioned and fixed to the valve main body 10.
A ring-shaped seal member 620 is inserted into the inner diameter portion of the guide member 600 and is fixed by a stopper 630 such as a push nut.
The seal member 620 seals passage of the refrigerant between the second passage 24 and the third passage 26.

弁本体１０には、第３の通路２６に連通するパワーエレメント７０を取り付けるための開口した駆動装置取付穴６２７が形成され、弁本体１０の駆動装置取付穴６２７の内周には環状凹溝６２８とめねじ部６２９が形成されている。 The valve body 10 is formed with an open drive device mounting hole 627 for mounting a power element 70 communicating with the third passage 26, and an annular groove 628 in the inner periphery of the drive device mounting hole 627 of the valve body 10. A female screw portion 629 is formed.

パワーエレメント７０のキャン体７２の下蓋７２ｂには、弁本体１０の駆動装置取付穴６２７に嵌合する円筒状の取付座６７３が一体に形成され、パワーエレメント７０のキャン体７２の取付座６７３の先端部の外周には弁本体１０の駆動装置取付穴６２７のめねじ部６２９に螺合するおねじ部６７４が形成され、パワーエレメント７０のキャン体７２の取付座６７３のおねじ部６７４は弁本体１０の駆動装置取付穴６２７のめねじ部６２９に螺合され、パワーエレメント７０が弁本体１０の駆動装置取付穴６２７に螺着されている。 A cylindrical mounting seat 673 that fits into the driving device mounting hole 627 of the valve body 10 is integrally formed on the lower lid 72b of the can body 72 of the power element 70, and the mounting seat 673 of the can body 72 of the power element 70 is formed. A male thread portion 674 that is screwed into a female thread portion 629 of the drive device mounting hole 627 of the valve body 10 is formed on the outer periphery of the distal end portion of the valve body 10, and the thread portion 674 of the mounting seat 673 of the can body 72 of the power element 70 is The power element 70 is screwed into the driving device mounting hole 627 of the valve main body 10 and is screwed into the female thread portion 629 of the driving device mounting hole 627 of the valve main body 10.

弁本体１０の駆動装置取付穴６２７の環状凹溝６２８には、パワーエレメント７０のキャン体７２の取付座６７３の外周面に密接するシール部材としてＯリング６７７が配置されている。 An O-ring 677 is disposed in the annular groove 628 of the drive device mounting hole 627 of the valve body 10 as a seal member that is in close contact with the outer peripheral surface of the mounting seat 673 of the can body 72 of the power element 70.

パワーエレメント７０のキャン体７２内には、蒸発器から送出される冷媒の温度を感知して変位するダイアフラム８０とダイアフラム８０の変位を作動棒６０に伝達するストッパ部材９０が装備され、ストッパ部材９０にはダイアフラム８０と反対側の下面中央に円筒状の中空突起６９１が一体に形成され、ストッパ部材９０の中空突起６９１には作動棒６０の基端部が嵌入され、作動棒６０の先端が弁体３０に当接されている。 A can body 72 of the power element 70 is provided with a diaphragm 80 that senses and displaces the temperature of the refrigerant sent from the evaporator, and a stopper member 90 that transmits the displacement of the diaphragm 80 to the operating rod 60. A cylindrical hollow protrusion 691 is integrally formed at the center of the lower surface opposite to the diaphragm 80. The base end of the operating rod 60 is fitted into the hollow protrusion 691 of the stopper member 90, and the distal end of the operating rod 60 is the valve end. It is in contact with the body 30.

次に、この膨張弁の組立手順を説明する。
まず、弁本体１０のパワーエレメント７０を取り付ける側の開口部１２を介して弁室２２にスプリング３４と弁体３０が溶接された支持部材３２を挿入する。 Next, the procedure for assembling the expansion valve will be described.
First, the support member 32 in which the spring 34 and the valve body 30 are welded is inserted into the valve chamber 22 through the opening 12 on the side of the valve body 10 where the power element 70 is attached.

次に、防振部材６５０を取り付けたオリフィス部材６４０の組立体を開口部１２から挿入し、弁室２２の開口部６１６に圧入する。
この圧入は、適宜の圧入工具を使用し、必要に応じて、カシメ加工を施して固着する。 Next, the assembly of the orifice member 640 to which the vibration isolating member 650 is attached is inserted from the opening 12 and press-fitted into the opening 616 of the valve chamber 22.
For this press-fitting, an appropriate press-fitting tool is used, and if necessary, caulking is applied and fixed.

次に、作動棒６０が挿入されたガイド部材６００を開口部１２から挿入し、弁本体１０の段付穴６１４に圧入する。
ガイド部材６００は、段付部６１０により軸方向に位置決めされる。
必要に応じて、カシメ加工を施して固着する。 Next, the guide member 600 in which the operating rod 60 is inserted is inserted from the opening 12 and press-fitted into the stepped hole 614 of the valve body 10.
The guide member 600 is positioned in the axial direction by the stepped portion 610.
If necessary, apply caulking to secure.

最後に、弁本体１０の駆動装置取付穴６２７の環状凹溝６２８にＯリング６７７を嵌め込み、パワーエレメント７０のキャン体７２の取付座６７３を弁本体１０の駆動装置取付穴６２７に嵌入し、パワーエレメント７０のキャン体７２の取付座６７３のおねじ部６７４を弁本体１０の駆動装置取付穴６２７のめねじ部６２９に螺合させて締め付けることにより、パワーエレメント７０の組立体をねじ部７４により弁本体１０に螺合して、膨張弁１の組立を完了する。 Finally, an O-ring 677 is fitted into the annular groove 628 of the driving device mounting hole 627 of the valve body 10, and the mounting seat 673 of the can body 72 of the power element 70 is fitted into the driving device mounting hole 627 of the valve body 10. The assembly of the power element 70 is tightened by the threaded portion 74 by screwing the male threaded portion 674 of the mounting seat 673 of the can body 72 of the element 70 into the female threaded portion 629 of the drive device mounting hole 627 of the valve body 10. The valve body 10 is screwed to complete the assembly of the expansion valve 1.

上記構成により、パワーエレメント７０のキャン体７２の取付座６７３のおねじ部６７４を弁本体１０の駆動装置取付穴６２７のめねじ部６２９に螺合させて締め付けることにより、パワーエレメント７０が弁本体１０の駆動装置取付穴６２７に取り付けられ、Ｏリング６７７がパワーエレメント７０のキャン体７２の取付座６７３の外周に密接し、弁本体１０の駆動装置取付穴６２７の内周とパワーエレメント７０のキャン体７２の取付座６７３の外周との間からの冷媒の漏れをＯリング６７７により確実に防止することができる。 With the above configuration, the power element 70 can be tightened by screwing the male thread portion 674 of the mounting seat 673 of the can body 72 of the power element 70 into the female thread portion 629 of the drive device mounting hole 627 of the valve body 10. 10, the O-ring 677 is in close contact with the outer periphery of the mounting seat 673 of the can body 72 of the power element 70, the inner periphery of the driving device mounting hole 627 of the valve body 10 and the canister of the power element 70. Leakage of the refrigerant from between the outer periphery of the mounting seat 673 of the body 72 can be reliably prevented by the O-ring 677.

また、パワーエレメント７０のキャン体７２の取付座６７３のおねじ部６７４を弁本体１０の駆動装置取付穴６２７のめねじ部６２９に対して締め付ける方向または緩める方向に回転させることで、パワーエレメント７０が弁本体１０の駆動装置取付穴６２７に対して上下方向に移動し、作動棒６０をパワーエレメント７０と共に上下方向に移動させることができ、パワーエレメント７０のキャン体７２の取付座６７３のおねじ部６７４の弁本体１０の駆動装置取付穴６２７のめねじ部６２９へのねじ込み量で、膨張弁１の弁体３０が開き始めるセット値の微調整を行うことができる。 Further, by rotating the male thread portion 674 of the mounting seat 673 of the can body 72 of the power element 70 in the tightening direction or the loosening direction with respect to the female thread portion 629 of the driving device mounting hole 627 of the valve body 10, the power element 70 is rotated. Can move in the vertical direction with respect to the drive device mounting hole 627 of the valve body 10, and the operating rod 60 can be moved in the vertical direction together with the power element 70. The screw of the mounting seat 673 of the can body 72 of the power element 70. The set value at which the valve body 30 of the expansion valve 1 starts to be opened can be finely adjusted by the screwing amount of the portion 674 into the female thread portion 629 of the drive device mounting hole 627 of the valve body 10.

本発明の実施例１の膨張弁の断面図。Sectional drawing of the expansion valve of Example 1 of this invention. 図１の右側面図。The right view of FIG. 図１のガイド部材の拡大断面図。The expanded sectional view of the guide member of FIG. 図１の要部の拡大断面図。The expanded sectional view of the principal part of FIG. 図１のガイド部材の他の実施例の正面図（Ａ）及び断面図（Ｂ）。The front view (A) and sectional drawing (B) of the other Example of the guide member of FIG. 図１のガイド部材の更なる他の実施例の正面図（Ａ）及び断面図（Ｂ）。The front view (A) and sectional drawing (B) of the further another Example of the guide member of FIG. 本発明の他の実施例の要部拡大断面図。The principal part expanded sectional view of the other Example of this invention. 図１の防振部材の斜視図。The perspective view of the vibration isolator of FIG. 実施例２の防振部材の斜視図。The perspective view of the vibration isolator of Example 2. FIG. 図９の防振部材のガイド部材に装着した状態を示す斜視図。The perspective view which shows the state with which the vibration isolator of FIG. 9 was mounted | worn with the guide member. 図９の防振部材に作動棒を装着した状態を示す平面図。FIG. 10 is a plan view showing a state in which an operating rod is attached to the vibration isolating member of FIG. 9. 実施例３の防振部材の斜視図。FIG. 6 is a perspective view of a vibration isolating member according to Embodiment 3. 図１１の防振部材のガイド部材に装着した状態の斜視図。FIG. 12 is a perspective view of a state in which the anti-vibration member of FIG. 11 is attached to the guide member. 図１２の防振部材の部分説明図（Ａ）及び要部側面図（Ｂ）。Partial explanatory drawing (A) and principal part side view (B) of the vibration isolator of FIG. 図１２の防振部材に作動棒を装着した状態を示す平面図。The top view which shows the state which mounted | wore the vibration isolating member of FIG. 12 with the action | operation stick | rod. 実施例４の防振部材の部分説明図（Ａ）及び要部側面図（Ｂ）。Partial explanatory drawing (A) and principal part side view (B) of the vibration isolator of Example 4. FIG. 図１６の防振部材に作動棒を装着した状態を示す平面図。The top view which shows the state which mounted | wore the vibration isolating member of FIG. 実施例５の防振部材の部分説明図（Ａ）及び要部側面図（Ｂ）。Partial explanatory drawing (A) and principal part side view (B) of the vibration isolator of Example 5. FIG. 図１８の防振部材に作動棒を装着した状態を示す平面図。The top view which shows the state which mounted | wore the operating rod to the vibration isolator of FIG. 本発明の実施例６の膨張弁の断面図（図２１のＸ−Ｘ断面）。Sectional drawing (XX cross section of FIG. 21) of the expansion valve of Example 6 of this invention. 図２０の右側面図。The right view of FIG. 本発明の実施例７の膨張弁の断面図。Sectional drawing of the expansion valve of Example 7 of this invention. 図２２の右側面図。The right view of FIG.

Explanation of symbols

１膨張弁
１０弁本体
１０ａ，１０ｂ，１０ｃ取付穴
１１カシメ部
１２開口部
１３段部
１４段付穴
１５段部
１６径小孔部
１７径大孔部
２０第１の通路
２２弁室
２２ａ有底
２４第２の通路
２６第３の通路
２８貫通穴
３０弁体
３２支持部材
３４スプリング
４０，４０’ オリフィス部
４０” オリフィス部材
４２絞り部
４３通路
４４案内部
４４’ 壁部
４５円板部
４６平坦部
４７傾斜部
５０防振部材
５２リング部
５２ａ，５２ｂ両端部
５４防振バネ
５６切欠き部
６０作動棒
７０パワーエレメント（駆動装置）
７２キャン体
７２ａ上蓋
７２ｂ下蓋
７４ねじ部
７６シール部材
８０ダイアフラム
８２圧力室
８４栓体
９０ストッパ部材
１００ガイド部材
１０１作動棒孔
１０２ガイド部
１１０段部
１２０径大孔部
１２１径大部
１２２端部
１５０防振部材（リング部材実施例２）
１５２リング部
１５２ａ，１５２ｂ両端部の舌片
１５４防振バネ
２００ガイド部材
２０１作動棒孔
２０２ガイド部
２２０径大孔部
２２２端部
２４０オリフィス部
２４２絞り部
２４３通路
２４４壁部
２４４ｂ端部（位置決め部）
２４５円盤部
２４６平坦部
２４７傾斜部
２５０防振部材（リング部材実施例３）
２５２リング部
２５２ａ，２５２ｂ両端部
２５４防振バネ
２５６球面部
３５０防振部材（リング部材実施例４）
３５２リング部
３５４防振バネ
３５６曲面突条部
４５０防振部材（リング部材実施例５）
４５２リング部
４５４防振バネ
４５６突条部
５００ガイド部材
５２１径大部
５４０オリフィス部
５４１シール溝
５５０リングシール
６００ガイド部材
６１０段付部
６１４段付穴
６１６開口部
６２０シール部材
６２７駆動装置取付穴
６２８環状凹溝
６２９めねじ部
６３０止め具
６４０オリフィス部材
６４２開口部
６５０防振部材
６７３取付座
６７４おねじ部
６７７Ｏリング（シール部材）
６９１中空突起 DESCRIPTION OF SYMBOLS 1 Expansion valve 10 Valve main body 10a, 10b, 10c Mounting hole 11 Crimp part 12 Opening part 13 Step part 14 Stepped hole 15 Step part 16 Diameter small hole part 17 Diameter large hole part 20 1st channel | path 22 Valve chamber 22a Bottom 24 Second passage 26 Third passage 28 Through hole 30 Valve body 32 Support member 34 Spring 40, 40 'Orifice portion 40 "Orifice member 42 Restriction portion 43 Passage 44 Guide portion 44' Wall portion 45 Disc portion 46 Flat portion 47 Inclined part 50 Anti-vibration member 52 Ring parts 52a, 52b Both end parts 54 Anti-vibration spring 56 Notch part 60 Actuator rod 70 Power element (drive device)
72 Can body 72a Upper lid 72b Lower lid 74 Screw portion 76 Seal member 80 Diaphragm 82 Pressure chamber 84 Plug body 90 Stopper member 100 Guide member 101 Actuating rod hole 102 Guide portion 110 Step portion 120 Diameter large hole portion 121 Diameter large portion 122 End portion 150 Anti-Vibration Member (Ring Member Example 2)
152 Ring portions 152a and 152b Tongue pieces 154 at both ends Vibration-proof spring 200 Guide member 201 Actuating rod hole 202 Guide portion 220 Large diameter hole portion 222 End portion 240 Orifice portion 242 Restriction portion 243 Channel 244 Wall portion 244b End portion (positioning portion) )
245 Disc part 246 Flat part 247 Inclined part 250 Anti-vibration member (ring member Example 3)
252 Ring portions 252a, 252b Both end portions 254 Anti-vibration spring 256 Spherical surface portion 350 Anti-vibration member (ring member Example 4)
352 Ring part 354 Anti-vibration spring 356 Curved ridge part 450 Anti-vibration member (ring member Example 5)
452 Ring portion 454 Anti-vibration spring 456 Projection ridge 500 Guide member 521 Large diameter portion 540 Orifice portion 541 Seal groove 550 Ring seal 600 Guide member 610 Stepped portion 614 Stepped hole 616 Opening portion 620 Seal member 627 Drive device mounting hole 628 Annular groove 629 Female thread 630 Stopper 640 Orifice member 642 Opening 650 Anti-vibration member 673 Mounting seat 674 Male thread 677 O-ring (seal member)
691 Hollow protrusion

Claims

A valve body, a bottomed valve chamber formed in the valve body, an opening formed upward from the valve chamber and opened at an upper end of the valve body, and formed in the valve body. A first passage for introducing a high-pressure refrigerant into the valve chamber; a second passage formed in the valve body through which the refrigerant sent to the evaporator passes; and a passage formed in the valve body and fed from the evaporator side. A third passage through which the refrigerant passes, an orifice portion that is mounted in the opening and has a throttle portion that throttles the refrigerant flowing from the valve chamber toward the second passage, and the orifice portion so as to face the throttle portion A valve body disposed in the valve chamber; an operating rod that is inserted into the opening to move the valve body; a drive device that is mounted on an upper end of the valve body and drives the operating rod; and is mounted in the opening. a guide member for guiding the operating rod slidably, said Guy An anti-vibration member mounted on the member for preventing vibration of the operating rod, the anti-vibration member being arranged concentrically with the operating rod and elastically deformable, and the annular portion And a vibration-proof spring that elastically contacts the outer peripheral surface of the operating rod, and the valve body, the orifice portion, the guide member, and the operating rod are arranged from above the valve body. An expansion valve characterized by being inserted and mounted in the valve body.

The expansion valve according to claim 1, wherein the orifice portion is formed integrally with the guide member.

The expansion valve according to claim 1, wherein the guide member is caulked and fixed to the valve body.

The expansion valve according to claim 1, wherein the guide member includes a positioning portion for positioning the guide member at a predetermined position of the valve body in cooperation with the valve body.

The expansion valve according to claim 4, wherein the positioning portion includes a step portion formed integrally with the guide member.

The expansion valve according to claim 1, wherein the orifice portion is press-fitted into the valve body.

The expansion valve according to claim 5, wherein the stepped portion is in contact with the valve main body while maintaining a sealing property.

The expansion valve according to claim 7, wherein a contact portion of the step portion with the valve body is in surface contact with the valve body.

The expansion valve according to claim 2, wherein a positioning portion for positioning the guide member with respect to the valve main body is configured by the orifice portion and the valve main body.

The expansion valve according to claim 9, wherein the positioning portion includes a step portion formed integrally with the valve body.

The expansion valve according to claim 9 or 10, wherein the guide member is fixed by caulking to the valve body.

The vibration isolating member is furnished to said guide member, said guide at least some of the sites interior of the damping member in the member, characterized in that it is disposed in the third passage claims 1 to Item 12. The expansion valve according to any one of Items 11 .

The expansion valve according to any one of claims 1 to 12 , wherein a seal groove is formed on an outer periphery of the orifice portion, and a ring seal is attached to the seal groove.

The opening communicates with the third passage and has an upper end as a driving device mounting hole for mounting the driving device, and an annular groove and a female screw portion are formed on the inner periphery of the driving device mounting hole. The drive device has a can body fixed to the drive device mounting hole, and the can body is integrally formed with a cylindrical mounting seat that fits into the drive device mounting hole. the male thread portion screwed to the female screw portion is formed, the claims 1 to 13 in the annular groove, characterized in that the sealing member in close contact with the outer peripheral surface of the mounting seat is arranged The expansion valve according to any one of the above.

The expansion valve according to claim 14 , wherein the seal member is an O-ring.

The can body is equipped with a diaphragm that senses and displaces the temperature of the refrigerant delivered from the evaporator, and a stopper member that transmits the displacement of the diaphragm to the operating rod, and one end of the operating rod is The expansion valve according to claim 14 , wherein the expansion valve is connected to the stopper member and a tip of the other end of the operating rod is in contact with the valve body.