JP2005249273A - Thermal expansion valve - Google Patents

Thermal expansion valve Download PDF

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Publication number
JP2005249273A
JP2005249273A JP2004059355A JP2004059355A JP2005249273A JP 2005249273 A JP2005249273 A JP 2005249273A JP 2004059355 A JP2004059355 A JP 2004059355A JP 2004059355 A JP2004059355 A JP 2004059355A JP 2005249273 A JP2005249273 A JP 2005249273A
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Prior art keywords
valve
operating rod
valve body
expansion valve
passage
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JP2005249273A5 (en
JP4335713B2 (en
Inventor
Kazuto Kobayashi
和人 小林
Kazuhiko Watanabe
和彦 渡辺
Shigeki Ito
繁樹 伊藤
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Fujikoki Corp
Denso Corp
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Fujikoki Corp
Denso Corp
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Priority to JP2004059355A priority Critical patent/JP4335713B2/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2341/00Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/06Details of flow restrictors or expansion valves
    • F25B2341/068Expansion valves combined with a sensor
    • F25B2341/0683Expansion 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

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  • Temperature-Responsive Valves (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thermal expansion valve capable of stably holding the value of an opening area by securely adjusting, to any value, the opening area for adiabatically expanding a gas-liquid two-phase refrigerant from the liquid-phase refrigerant of the thermal expansion valve in which the pressing force of a pressing member pressed in a valve opening direction is controlled by controlling the projected amount of the pressing member. <P>SOLUTION: This thermal expansion valve comprises an operation bar 60 supported on a valve body 10, a valve element 30 opening and closing an orifice part 40 by the movement of the operation bar 60, and a stopper member 90 moved by the vertical movement of a diaphragm 80. The relative position of the operation bar 60 relative to the diaphragm 80 is changeable. The valve element 30 is pressed to the orifice part 40 side by a spring 34 in a valve chamber 22 formed in the valve body 10. The valve element 30 is pressed to the spring 34 side by the operation bar 60. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、カーエアコン等の空調装置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温度式膨張弁に関する。   The present invention relates to a temperature type expansion valve that controls the flow rate of refrigerant supplied to an evaporator (evaporator) in accordance with the temperature of an air conditioner such as a car air conditioner.

図5は、従来技術(下記特許文献1参照)に係る温度式膨張弁の縦断面図である。全体を符号100で示す温度式膨張弁は角柱形状の弁本体110を具備し、該弁本体110には空調装置の圧縮機側から送られてくる高圧の冷媒を導入する通路120が形成され、該通路120に連通する弁室122が弁本体110の下部内部に形成される。   FIG. 5 is a longitudinal sectional view of a temperature type expansion valve according to a conventional technique (see Patent Document 1 below). A temperature type expansion valve denoted as a whole by reference numeral 100 includes a prismatic valve main body 110, and a passage 120 for introducing a high-pressure refrigerant sent from the compressor side of the air conditioner is formed in the valve main body 110. A valve chamber 122 communicating with the passage 120 is formed inside the lower portion of the valve body 110.

上記弁室122は、弁座124を介して通路120から通路126に連通し、通路126からは蒸発器側へ冷媒を送出する。弁室122内には、弁座124に対向して球形の弁体130が装備され、弁体130は弁体受け部材132により支持される。また、弁体受け部材132は、スプリング134を介して調節ネジとなるナット部材136により支持される。ナット部材136は、弁本体110に対してねじ部137により螺合され、六角穴138を利用してレンチ等の工具によりねじ込まれる。   The valve chamber 122 communicates from the passage 120 to the passage 126 via the valve seat 124, and sends the refrigerant from the passage 126 to the evaporator side. A spherical valve body 130 is provided in the valve chamber 122 so as to face the valve seat 124, and the valve body 130 is supported by a valve body receiving member 132. Further, the valve body receiving member 132 is supported by a nut member 136 serving as an adjusting screw via a spring 134. The nut member 136 is screwed into the valve main body 110 with a screw portion 137 and screwed with a tool such as a wrench using the hexagonal hole 138.

このナット部材136のねじ込み量により弁体130を支持するスプリング134のばね力を調整することにより弁体130を閉弁方向に付勢することができる。ナット部材136には、シール部材139が取付けられ、弁室122内から冷媒が漏出することを防止する。   The valve body 130 can be urged in the valve closing direction by adjusting the spring force of the spring 134 that supports the valve body 130 by the screwing amount of the nut member 136. A seal member 139 is attached to the nut member 136 to prevent the refrigerant from leaking out of the valve chamber 122.

弁本体110には、蒸発器側から圧縮機側へ戻る冷媒の戻り通路128が通路126と平行に形成される。弁体130は、弁本体110の中心部を貫通する作動棒140により操作される。作動棒140の上端はストッパ部材150に挿入され、その下端は弁体130に当接する。   In the valve body 110, a refrigerant return passage 128 returning from the evaporator side to the compressor side is formed in parallel with the passage 126. The valve body 130 is operated by an operating rod 140 that passes through the central portion of the valve body 110. The upper end of the operating rod 140 is inserted into the stopper member 150, and the lower end thereof contacts the valve body 130.

作動棒140と弁本体110の間には、シール部材142が装備され、冷媒の送り出し通路126と冷媒の戻り通路128との間のシールを形成している。ストッパ部材150は、全体を符号160で示すパワーエレメントと称する駆動装置内に装備される。パワーエレメント160は、上蓋161と下蓋162とからなる円盤形状のキャン体163を有し、キャン体163は下蓋162のねじ部164により弁本体110の上部に螺合されると共にストッパ部材150は、その周辺部が下蓋162に支持される。   A seal member 142 is provided between the actuating rod 140 and the valve main body 110 to form a seal between the refrigerant delivery passage 126 and the refrigerant return passage 128. The stopper member 150 is mounted in a drive device called a power element, which is indicated as a whole by reference numeral 160. The power element 160 includes a disk-shaped can body 163 including an upper lid 161 and a lower lid 162, and the can body 163 is screwed onto the upper portion of the valve body 110 by a screw portion 164 of the lower lid 162 and a stopper member 150. The peripheral part is supported by the lower lid 162.

キャン体163内には、ダイアフラム166が設けられ、その周辺部が上蓋161と下蓋162とによって挟み込まれて溶接により固着されており、上部圧力室168と下部圧力室169が形成される。上部圧力室168内には作動流体が充填され、栓体170により封止される。冷媒の戻り通路128内を通過する冷媒の圧力は、ストッパ部材150の下面に作用し、冷媒の温度は作動棒140を介してストッパ部材150へ伝達され、ダイアフラム166を介して上部圧力室168内の作動流体に伝達される。   A diaphragm 166 is provided in the can body 163, and a peripheral portion thereof is sandwiched between the upper lid 161 and the lower lid 162 and fixed by welding to form an upper pressure chamber 168 and a lower pressure chamber 169. The upper pressure chamber 168 is filled with a working fluid and sealed with a plug 170. The pressure of the refrigerant passing through the refrigerant return passage 128 acts on the lower surface of the stopper member 150, and the temperature of the refrigerant is transmitted to the stopper member 150 via the operating rod 140 and inside the upper pressure chamber 168 via the diaphragm 166. To the working fluid.

上部圧力室168内の圧力により、ダイアフラム166は変位し、その変位量は作動棒140を介して弁体130を作動させ、通路120を流れる冷媒を減圧膨張させ、弁座124を形成する絞り通路の開口面積を調整し、蒸発器側へ流入する冷媒の流量を制御する。   The diaphragm 166 is displaced by the pressure in the upper pressure chamber 168, and the displacement amount operates the valve body 130 via the operating rod 140, decompresses and expands the refrigerant flowing through the passage 120, and forms the valve seat 124. The flow area of the refrigerant flowing into the evaporator side is controlled.

かかる従来技術の温度式膨張弁においては、弁受け部材、スプリング及び調節ネジ等の多くの部品点数を要しており、温度式膨張弁の小型化及び軽量化の達成を困難にしていた。また、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。
そこで、上記温度式膨張弁の小型化、軽量化の要請に応じ、構造を簡素化し、部品点数を削減した温度式膨張弁が発明されている。
Such a conventional temperature type expansion valve requires many parts such as a valve receiving member, a spring, and an adjusting screw, making it difficult to reduce the size and weight of the temperature type expansion valve. In addition, there is a risk that a refrigerant leaks from the valve chamber through the adjusting screw portion.
Therefore, in response to demands for downsizing and weight reduction of the temperature type expansion valve, a temperature type expansion valve has been invented with a simplified structure and a reduced number of parts.

図6は、その第2の従来技術(下記特許文献2参照)に係る温度式膨張弁の縦断面図である。全体を符号200で示す温度式膨張弁のハウジングを構成する弁本体210の下部側には、空調装置の圧縮機側から送られてくる高圧の冷媒を受け入れる第1の通路220が形成される。   FIG. 6 is a longitudinal sectional view of a temperature type expansion valve according to the second prior art (see Patent Document 2 below). A first passage 220 for receiving high-pressure refrigerant sent from the compressor side of the air conditioner is formed on the lower side of the valve main body 210 that constitutes the housing of the temperature type expansion valve denoted as a whole by reference numeral 200.

この第1の通路220は、有底の穴であって、その底部近傍は弁室222が形成される。弁室222は、弁本体210内に第1の通路220と垂直に形成された絞り通路を形成する穴216に圧入される弁座部材211を介して第1の通路220と平行に弁本体210内に形成された第2の通路226に連通し、第2の通路226は蒸発器側へ冷媒を送出する。弁本体210の上部側には、第2の通路226に平行して設けられる第3の通路228が形成される。第3の通路228は、弁本体210を貫通し、蒸発器側から圧縮機側へ戻る冷媒が通過する。   The first passage 220 is a bottomed hole, and a valve chamber 222 is formed in the vicinity of the bottom. The valve chamber 222 is parallel to the first passage 220 through a valve seat member 211 that is press-fitted into a hole 216 that forms a throttle passage formed perpendicularly to the first passage 220 in the valve body 210. The second passage 226 communicates with the second passage 226 formed therein, and sends the refrigerant to the evaporator side. A third passage 228 provided in parallel with the second passage 226 is formed on the upper side of the valve body 210. The third passage 228 passes through the valve main body 210 and passes through the refrigerant returning from the evaporator side to the compressor side.

弁室222内には、球形の弁体230が第1の通路220の上流側から絞り通路に対向配設され、弁体230は作動棒232の下端と溶接により固着されている。作動棒232は、弁本体210の縦穴214内を摺動し、作動棒232に設けられるシール部材234が第2の通路226と第3の通路228の間のシールを形成する。作動棒232は、弁本体210の穴212を貫通し、その上端236はストッパ部材240に当接される。   A spherical valve body 230 is disposed in the valve chamber 222 so as to face the throttle passage from the upstream side of the first passage 220, and the valve body 230 is fixed to the lower end of the operating rod 232 by welding. The operating rod 232 slides in the vertical hole 214 of the valve body 210, and a seal member 234 provided on the operating rod 232 forms a seal between the second passage 226 and the third passage 228. The operating rod 232 passes through the hole 212 of the valve main body 210, and the upper end 236 thereof is in contact with the stopper member 240.

全体を符号260で示すパワーエレメントは、上蓋263と下蓋263′とからなるキャン体262を有し、キャン体262は下蓋263′のねじ部264により本体210の上端に螺合されると共にストッパ部材240はその周辺部が下蓋263′により支持される。キャン体262には、ダイアフラム266が設けられ、その周辺部は上蓋263と下蓋263′とによって挟み込まれており、溶接により共に固着され、上部圧力室268と下部圧力室269が形成される。上部圧力室268内には作動流体例えば冷媒が充填され、栓体270により封止される。   A power element generally indicated by reference numeral 260 has a can body 262 composed of an upper lid 263 and a lower lid 263 '. The can body 262 is screwed onto the upper end of the main body 210 by a screw portion 264 of the lower lid 263'. The periphery of the stopper member 240 is supported by the lower lid 263 '. The can body 262 is provided with a diaphragm 266, and its peripheral portion is sandwiched between an upper lid 263 and a lower lid 263 ′ and fixed together by welding to form an upper pressure chamber 268 and a lower pressure chamber 269. The upper pressure chamber 268 is filled with a working fluid, such as a refrigerant, and sealed with a plug 270.

ストッパ部材240の上面はダイアフラム266に当接し、ストッパ部材240の下面に当接する作動棒232の上端236の段部と穴212を形成する弁本体210の突起部213との間には、コイルスプリング242が配設され、そのばね力は作動棒230を介してストッパ部材240を上部圧力室268側に向けて付勢する。ストッパ部材240の下面は凹部241が形成され、凹部241の底面と作動棒232の上端236が当接する。   The upper surface of the stopper member 240 is in contact with the diaphragm 266, and a coil spring is provided between the step portion of the upper end 236 of the operating rod 232 that contacts the lower surface of the stopper member 240 and the protrusion 213 of the valve body 210 that forms the hole 212. 242 is provided, and the spring force urges the stopper member 240 toward the upper pressure chamber 268 via the operating rod 230. A concave portion 241 is formed on the lower surface of the stopper member 240, and the bottom surface of the concave portion 241 comes into contact with the upper end 236 of the operating rod 232.

第3の通路228を通過する蒸発器側から圧縮機側へ戻る冷媒は、弁本体210の穴212を通ってストッパ部材240の下面に圧力を伝達する。作動棒232は、感温部材として機能して、第3の通路228を通過する冷媒の温度をストッパ部材240、ダイアフラム266を介して上部圧力室268内の作動流体に伝達する。上部圧力室268内の圧力とストッパ部材240の下面に作用する圧力とつり合う位置に作動棒232は変位して、弁体230により絞り通路の開口面積を調整して、第1の通路220を通過し、第2の通路226から蒸発器側へ送り出される冷媒の流量を制御する。   The refrigerant that passes through the third passage 228 and returns from the evaporator side to the compressor side transmits pressure to the lower surface of the stopper member 240 through the hole 212 of the valve body 210. The operating rod 232 functions as a temperature sensing member, and transmits the temperature of the refrigerant passing through the third passage 228 to the working fluid in the upper pressure chamber 268 via the stopper member 240 and the diaphragm 266. The operating rod 232 is displaced to a position where the pressure in the upper pressure chamber 268 and the pressure acting on the lower surface of the stopper member 240 are balanced, and the opening area of the throttle passage is adjusted by the valve body 230 to pass through the first passage 220. The flow rate of the refrigerant sent out from the second passage 226 to the evaporator side is controlled.

しかしながら、第2の従来技術においても開弁特性を微調整し、いわゆる過熱度を設定することが望まれている。   However, also in the second prior art, it is desired to finely adjust the valve opening characteristics and set a so-called superheat degree.

また、前記開弁特性を調整するため、コイルスプリング242のばね力を変える必要があり、このため自由長の異なるコイルスプリングを用意しなければならない。
特開2001−50617号公報 特開2002−310538号公報
Further, in order to adjust the valve opening characteristics, it is necessary to change the spring force of the coil spring 242. For this reason, coil springs having different free lengths must be prepared.
JP 2001-50617 A JP 2002-310538 A

本発明は、前記従来技術の問題に鑑みてなされたものであって、その目的とするところは、オリフィスの冷媒通過量を調整する弁部材において、開弁方向に押圧する押圧部材の押圧力の調整を、押圧部材の突出量の調整によって開弁特性を可変とさせることができる温度式膨張弁を提供することにある。   The present invention has been made in view of the problems of the prior art, and an object of the present invention is to provide a valve member that adjusts the amount of refrigerant passing through the orifice, in the pressing force of the pressing member that presses in the valve opening direction. The purpose of the adjustment is to provide a temperature type expansion valve that can vary the valve opening characteristic by adjusting the protruding amount of the pressing member.

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。
請求項1記載の温度式膨張弁は、弁本体に支持される作動棒と、作動棒の移動によりオリフィス部に対して開閉する弁体と、ダイアフラムの上下動により移動するストッパ部材と、を具備する温度式膨張弁において、上記ダイアフラムに対する上記作動棒の相対位置を変更可能としたことを特徴とする。
請求項2記載の温度式膨張弁は、上記手段において、ストッパ部材に対する作動棒の相対位置を変更可能と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.
The temperature type expansion valve according to claim 1 comprises an operating rod supported by the valve body, a valve body that opens and closes with respect to the orifice portion by the movement of the operating rod, and a stopper member that moves by the vertical movement of the diaphragm. In the temperature-type expansion valve, the relative position of the operating rod with respect to the diaphragm can be changed.
The temperature expansion valve according to claim 2 is characterized in that, in the above means, the relative position of the operating rod with respect to the stopper member can be changed.

請求項3記載の温度式膨張弁は、請求項2記載の温度式膨張弁において、ストッパ部材に対して作動棒をネジ結合させたことを特徴とする。
請求項4記載の温度式膨張弁は、請求項1記載の温度式膨張弁において、ストッパ部材を上下の二部材から構成し、該二部材を作動棒の移動方向において相対距離を変更可能としたことを特徴とする。
The temperature type expansion valve according to claim 3 is the temperature type expansion valve according to claim 2, wherein an operating rod is screwed to the stopper member.
The temperature type expansion valve according to claim 4 is the temperature type expansion valve according to claim 1, wherein the stopper member is composed of two upper and lower members, and the relative distance of the two members can be changed in the moving direction of the operating rod. It is characterized by that.

請求項5記載の温度式膨張弁は、請求項4記載の温度式膨張弁において、上記二部材をネジ結合させたことを特徴とする。
請求項6記載の温度式膨張弁は、請求項1乃至請求項5記載のいずれかの温度式膨張弁において、上記弁体は、弁本体に形成された弁室内でスプリングにより上記オリフィス部側に押圧され、且つ、前記弁体は前記作動棒によりスプリング側に押圧されることを特徴とする。
The temperature type expansion valve according to claim 5 is the temperature type expansion valve according to claim 4, wherein the two members are screwed together.
A temperature type expansion valve according to a sixth aspect of the present invention is the temperature type expansion valve according to any one of the first to fifth aspects, wherein the valve body is moved to the orifice portion side by a spring in a valve chamber formed in the valve body. The valve body is pressed against the spring side by the operating rod.

本発明は、上記構成により下記の効果を奏する。即ち、
請求項1記載の発明によれば、作動棒による押圧の程度を変更可能とし、弁体の開閉の程度を変更可能とすることができる。
請求項2記載の発明によれば、上記効果に加えて、ストッパ部材に対する作動棒の位置を単に変更するだけでよい。
The present invention has the following effects by the above configuration. That is,
According to the first aspect of the present invention, the degree of pressing by the operating rod can be changed, and the degree of opening and closing of the valve body can be changed.
According to the second aspect of the present invention, in addition to the above effect, the position of the operating rod relative to the stopper member may be simply changed.

請求項3記載の発明によれば、上記請求項2記載の発明の効果に加えて、ネジ結合という簡単な手段で、弁体の開閉調節を実現できる。
請求項4記載の発明は、請求項1記載の発明の効果に加えて、比較的径の大きいストッパ部材により、弁体を開閉調節できるから、その操作が容易となり、また、二部材の結合関係も安定する。
According to the invention described in claim 3, in addition to the effect of the invention described in claim 2, the opening / closing adjustment of the valve body can be realized by a simple means of screw connection.
In addition to the effect of the invention of claim 1, the invention of claim 4 can be opened and closed by a stopper member having a relatively large diameter, so that the operation thereof is facilitated, and the two-member connection relationship Is also stable.

請求項5記載の発明によれば、請求項4記載の発明の効果に加えて、ネジ結合という簡単な手段で、弁体の開閉調節を実現できる。
請求項6記載の発明によれば、請求項1乃至請求項5記載のいずれかの発明の効果において、スプリング側の調整を不要としたことで、弁体の気密性の向上と、弁本体の構成を簡略化することができる。
According to the invention described in claim 5, in addition to the effect of the invention described in claim 4, the opening / closing adjustment of the valve body can be realized by a simple means of screw connection.
According to the invention of claim 6, in the effect of the invention of any one of claims 1 to 5, the adjustment on the spring side is not required, thereby improving the airtightness of the valve body and improving the valve body. The configuration can be simplified.

以下、本発明の実施例1,2について図面を用いて説明するが、該説明中において、上・下・左・右という表現を用いることがあるが、実際の実施例においては、必ずしもこの位置関係にあるとは限らないことを付言しておく。   Hereinafter, the first and second embodiments of the present invention will be described with reference to the drawings. In the description, expressions such as “up”, “down”, “left”, and “right” may be used. It is added that it is not always related.

図1は、本発明に係る実施例1の縦断面図、図2は同実施例1の温度式膨張弁の要部縦断面図であり、この図に基づいて説明する。
全体を符号1で示す温度式膨張弁は、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35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に溶接によりとりつけられて配置され、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。
FIG. 1 is a longitudinal sectional view of a first embodiment according to the present invention, and FIG. 2 is a longitudinal sectional view of an essential part of the temperature type expansion valve of the first embodiment.
A thermal expansion valve generally indicated by reference numeral 1 has a valve body 10 whose outer surface made of aluminum alloy or the like has a prismatic shape and has a circular hole in the center, and high pressure refrigerant flows into the valve body 10. One 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 35 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 portion 40 by a spring 34.

弁本体10に設けられる筒状のガイド部材35は、その中心部に作動棒孔36が形成されるガイド部37と、その外周部には段部38を有し、該段部38を介して一体に形成された円柱状の径大部39と、弁本体10に対してガイド部37の径大部に通路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、弁本体10に形成された段部13と、ガイド部材37の段部38とが面接触により当接し、ガイド部材35は正確に位置決めされて固着され、かかる段部38と段部13との面接触によりシール性が確保される。   The cylindrical guide member 35 provided in the valve body 10 has a guide portion 37 in which an operating rod hole 36 is formed at the center thereof, and a step portion 38 on the outer peripheral portion thereof. A cylindrical large-diameter portion 39 formed integrally with an orifice portion 40 formed integrally with a large-diameter portion of the guide portion 37 with respect to the valve main body 10 via a passage 43 is formed in the valve main body 10. The stepped portion 13 and the stepped portion 38 of the guide member 37 are brought into contact with each other by surface contact, the guide member 35 is accurately positioned and fixed, and the surface contact between the stepped portion 38 and the stepped portion 13 provides a sealing property. Secured.

また、ガイド部材35の下部に形成された第2の通路24に連通する通路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。   In addition, an orifice portion 40 formed through a passage 43 communicating with the second passage 24 formed in the lower portion of the guide member 35 has a throttle portion 42 that allows the valve chamber 22 and the passage 43 to communicate with each other at the center. And forms a refrigerant flow path with 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37の上部には段付穴14が形成され、該段付穴14内の防振部材50が作動棒60外周に装着され、作動棒60の振動を防止する。
本実施例のガイド部材35は弁本体10によりカシメ固定されると共に、ガイド部材35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35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。
A stepped hole 14 is formed in the upper portion of the guide portion 37, and a vibration isolating member 50 in the stepped hole 14 is mounted on the outer periphery of the operating rod 60 to prevent the operating rod 60 from vibrating.
The guide member 35 of this embodiment is fixed by caulking by the valve body 10 and the orifice portion 40 of the guide member 35 is fixed to the valve body 10 by press-fitting, so that the guide member 35 is securely fixed to the valve body 10. . Moreover, the orifice portion 40 is fixed by securing a sealing property by being press-fitted.

弁本体10の弁室22の反対側の端部(上端部)には、パワーエレメント(弁体の駆動装置)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。   A power element (valve element drive device) 70 is attached to the end (upper 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.

ダイアフラムの圧力室82の反対側(下部)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の変位に追従して上下に摺動する。ストッパ部材90は、作動棒60に連結され、作動棒60の先端(下端)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を押圧し、オリフィス部40との間の流路面積を制御する。また、ストッパ部材90の上面にはダイアフラム当接面91が形成され、また、その周部には外延部92が形成されて、上記下蓋72bの内面に形成される受け部72cに当接するように形成される。   A stopper member 90 is disposed on the opposite side (lower part) of the pressure chamber 82 of the diaphragm. The refrigerant in the third passage 26 is introduced to the back surface of the stopper member through the opening 12. The stopper member 90 slides up and down following the displacement of the diaphragm 80. The stopper member 90 is connected to the operating rod 60, and the tip (lower end) of the operating rod 60 contacts the valve body 30. The displacement of the diaphragm 80 presses the valve body 30 via the operating rod 60 and controls the flow path area between the orifice portion 40 and the diaphragm 80. Further, a diaphragm contact surface 91 is formed on the upper surface of the stopper member 90, and an outer extension 92 is formed around the periphery thereof so as to contact the receiving portion 72c formed on the inner surface of the lower lid 72b. Formed.

次に、図2を用いて、ストッパ部材90に対する作動棒60の設定位置調整手段について説明する。
上記ストッパ部材90の下部には一体的に円筒状の連結筒部93が形成され、この連結筒部93の内周には雌ネジ部94aが形成され、また、この中心部の孔94内には、上記作動棒60の上端部に形成された径小部62外周の雄ネジ部63が螺合される。そして、この作動棒60の回転により、孔94から径小部62を出入りさせてストッパ部材90に対する作動棒60の相対位置を調整することができる。
Next, the setting position adjusting means of the operating rod 60 with respect to the stopper member 90 will be described with reference to FIG.
A cylindrical connecting tube portion 93 is integrally formed at the lower portion of the stopper member 90, and a female screw portion 94 a is formed on the inner periphery of the connecting tube portion 93. The male screw part 63 on the outer periphery of the small diameter part 62 formed at the upper end part of the operating rod 60 is screwed together. Then, the rotation of the operating rod 60 allows the small diameter portion 62 to enter and exit from the hole 94 to adjust the relative position of the operating rod 60 with respect to the stopper member 90.

また、上記第3の通路26に面する作動棒60の外周部には、作動棒60の回転操作を容易にするために、横断面4角形或いは6角径の操作部61が形成されている。したがって、ストッパ部材90に対して作動棒60を上下に調節させたいときは、空調装置に本発明に係る温度式膨張弁1をセッティングする前、或いは、セッティング後において、第3の通路26を介して前記操作部61に回転工具をあてがって、作動棒60を回転操作すればよい。
そして、この調整により、作動棒60のオリフィス部40に対する下方(弁体30側)への突出量が設定され、また、弁体30への押圧量も設定されることになる。
Further, an operation portion 61 having a quadrangular or hexagonal cross section is formed on the outer peripheral portion of the operating rod 60 facing the third passage 26 in order to facilitate the rotating operation of the operating rod 60. . Therefore, when it is desired to adjust the operating rod 60 up and down with respect to the stopper member 90, the temperature type expansion valve 1 according to the present invention is set in the air conditioner or after the setting, via the third passage 26. Then, a rotating tool may be applied to the operation unit 61 to rotate the operating rod 60.
And by this adjustment, the protrusion amount to the downward direction (valve body 30 side) with respect to the orifice part 40 of the operating rod 60 is set, and the pressing amount to the valve body 30 is also set.

次に、この温度式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をとりつける側の開口部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, a procedure for assembling the temperature type 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がとりつけられ、且つ作動棒60が挿入されたガイド部材35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35は、段部13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 35 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 35 is positioned in the axial direction by the step portion 13, and is subjected to crimping (caulking portion 11) to be fixed.

最後にパワーエレメント70の組立体を弁本体10に装着する。この装着はねじ部74を弁本体10側のねじ部に螺合して行うが、このとき、ストッパ部材90側の孔94を作動棒60の径小部62の上端にあてがって回転させ、パワーエレメント70の組立体を弁本体10に確実に装着したあとで、作動棒60の回転により、作動棒60の位置設定を行えばよい。
以上のように、本発明は、スプリング34による無調整型の温度式膨張弁であっても、作動棒60の突出量(弁体に対する押圧量)の調整を可能とすることで、スプリング34による無調整型の温度式膨張弁のメリットを保持させながら、弁体の開閉量の調整を行わせることができる。
Finally, the assembly of the power element 70 is attached to the valve body 10. This mounting is performed by screwing the screw portion 74 into the screw portion on the valve body 10 side. At this time, the hole 94 on the stopper member 90 side is applied to the upper end of the small diameter portion 62 of the actuating rod 60 and rotated. After the assembly of the element 70 is securely attached to the valve body 10, the position of the operating rod 60 may be set by rotating the operating rod 60.
As described above, the present invention enables the adjustment of the protruding amount of the actuating rod 60 (the amount of pressing against the valve body) even with the non-adjustable temperature-type expansion valve using the spring 34, so that the spring 34 The opening / closing amount of the valve element can be adjusted while maintaining the merit of the non-adjustable temperature expansion valve.

次に、本発明の実施例2について説明する。図3は本発明に係る実施例2の縦断面図、図4は同実施例2の温度式膨張弁の要部縦断面図であり、この図に基づいて説明する。なお、本実施例において、図1,2記載の実施例1と同一構成部分には、同一符号を付すことにより、その説明を省略する。   Next, a second embodiment of the present invention will be described. FIG. 3 is a longitudinal sectional view of a second embodiment according to the present invention, and FIG. 4 is a longitudinal sectional view of an essential part of the temperature type expansion valve of the second embodiment. In the present embodiment, the same components as those in the first embodiment shown in FIGS.

図4に示すように、ダイアフラムの圧力室82の下部には、ストッパ部材90が配接される。このストッパ部材90の特徴は、上下(ストッパ部材90の移動方向)に二分割されて、上方のダイアフラム当接部90aと下方の調整部90bとからなり、ダイアフラム当接部90aの下面には孔95が形成され、その内周部には雌ネジ95aが形成されている。また、調整部90bの周部には前記雌ネジ95aと螺合可能な雄ネジ96が形成され、更に、調整部90bの下方には、連結筒部93が下方に延設されている。そして、この連結筒部93の中心の孔94には、作動棒60の上端部が挿入・固定されるようになっている。   As shown in FIG. 4, a stopper member 90 is disposed below the diaphragm pressure chamber 82. The stopper member 90 is divided into two parts in the vertical direction (moving direction of the stopper member 90), and includes an upper diaphragm contact portion 90a and a lower adjustment portion 90b. A hole is formed on the lower surface of the diaphragm contact portion 90a. 95 is formed, and an internal thread 95a is formed on the inner periphery thereof. Further, a male screw 96 that can be screwed with the female screw 95a is formed on the peripheral portion of the adjusting portion 90b, and a connecting tube portion 93 is extended downward below the adjusting portion 90b. The upper end portion of the operating rod 60 is inserted and fixed in the central hole 94 of the connecting cylinder portion 93.

また、上記連結筒部93の下端部は第3の通路26まで延設され、調整部90bの回転操作部93aを構成している。そして、操作部93aを工具等で回転することで、ダイアフラム当接部90aに対して調整部90bを上下させ、作動棒60を上下調整可能に構成している。
上記構成において、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の変位に追従して上下に摺動する。ストッパ部材90は、作動棒60に連結され、作動棒60の先端(下端)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を上下させ、オリフィス部40との間の流路面積を制御する。
Moreover, the lower end part of the said connection cylinder part 93 is extended to the 3rd channel | path 26, and comprises the rotation operation part 93a of the adjustment part 90b. And by rotating the operation part 93a with a tool etc., the adjustment part 90b can be moved up and down with respect to the diaphragm contact part 90a, and the actuating rod 60 can be adjusted up and down.
In the above configuration, 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 up and down following the displacement of the diaphragm 80. The stopper member 90 is connected to the operating rod 60, and the tip (lower end) of the operating rod 60 contacts the valve body 30. The displacement of the diaphragm 80 raises and lowers the valve body 30 via the operation rod 60 to control the flow path area between the orifice portion 40 and the diaphragm 80.

次に、実施例2における温度式膨張弁の組立手順は、実施例1ではストッパ部材90にたいする作動棒60の相対位置調整は作動棒60の回転により行うが、実施例2においては、調整部90bを上下させることで作動棒60を上下位置の調整を行う。   Next, in the assembly procedure of the temperature type expansion valve in the second embodiment, the relative position adjustment of the operating rod 60 with respect to the stopper member 90 is performed by the rotation of the operating rod 60 in the first embodiment, but in the second embodiment, the adjusting portion 90b is adjusted. Is moved up and down to adjust the vertical position of the operating rod 60.

以上のように、本発明は、実施例1或いは実施例2でも理解できるように、スプリングによる無調整型の温度式膨張弁であっても、作動棒60の突出量(弁体に対する押圧量)の調整を可能とすることで、スプリングによる無調整型の温度式膨張弁のメリットを保持させながら、開弁特性の調整を行わせることができる。   As described above, the present invention can be understood from the first embodiment or the second embodiment, even if it is a non-adjustable temperature expansion valve using a spring, the protruding amount of the actuating rod 60 (the pressing amount against the valve body). By making the adjustment possible, it is possible to adjust the valve opening characteristic while maintaining the merit of the non-adjustment type temperature expansion valve by the spring.

本発明の実施例1に係る温度式膨張弁の縦断面図。The longitudinal cross-sectional view of the temperature type expansion valve which concerns on Example 1 of this invention. 同実施例1の温度式膨張弁の要部縦断面図。The principal part longitudinal cross-sectional view of the temperature type expansion valve of the Example 1. FIG. 本発明の実施例2に係る温度式膨張弁の縦断面図。The longitudinal cross-sectional view of the temperature type expansion valve which concerns on Example 2 of this invention. 同実施形例2の温度式膨張弁の要部縦断面図。The principal part longitudinal cross-sectional view of the temperature type expansion valve of the example 2 of the embodiment. 従来技術1に係る温度式膨張弁の縦断面図。The longitudinal cross-sectional view of the temperature type expansion valve which concerns on the prior art 1. FIG. 従来技術2に係る温度式膨張弁の縦断面図。The longitudinal cross-sectional view of the temperature type expansion valve which concerns on the prior art 2. FIG.

符号の説明Explanation of symbols

1・・温度式膨張弁(本発明) 10・・弁本体 11・・カシメ部
12・・開口部 13・・段部 14・・段付穴 15・・段部
20・・第1の通路 22・・弁室 22a・・有底 24・・第2の通路
26・・第3の通路 30・・弁体 32・・支持部材 34・・スプリング
35・・ガイド部材 36・・作動棒孔 37・・ガイド部 38・・段部
39・・径大部40・・オリフィス部 42・・絞り部 43・・通路
50・・防振部材
DESCRIPTION OF SYMBOLS 1 ... Temperature type expansion valve (this invention) 10 ... Valve body 11 ... Caulking part 12 ... Opening part 13 ... Step part 14 ... Stepped hole 15 ... Step part 20 ... First passage 22 · · Valve chamber 22a · · bottom 24 · · second passage 26 · · third passage 30 · · valve body 32 · · support member 34 · · spring 35 · · guide member 36 · · actuating rod hole 37 ·・ Guide part 38 ・ ・ Step part
39 ·· Large diameter portion 40 · · Orifice portion 42 · · Throttling portion 43 · · Passage 50 · · Anti-vibration member

60・・作動棒 61・・操作部 62・・径小部 63・・雄ネジ部
70・・パワーエレメント(駆動装置)72・・キャン体 72a・・上蓋
72b・・下蓋 72c・・受け部 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 90a・・ダイアフラム当接部 90b・・調整部
91・・ダイアフラム当接面 92・・外延部
93・・連結筒部 93a・・操作部 94・・孔 94a・・雌ネジ部
95・・孔 95a・・雌ネジ・・ 96・・雄ネジ
60..Operating rod 61..Operation part 62..Small diameter part 63..Male screw part 70..Power element (driving device) 72..Can body 72a..Upper cover 72b..Lower cover 72c..Receiving part 74 ·· Screw portion 76 · · Seal member 80 · · Diaphragm 82 · · Pressure chamber 84 · · Plug member 90 · · Stopper member 90a · · Diaphragm contact portion 90b · · Adjustment portion 91 · · Diaphragm contact surface 92 · · Extension portion 93 · · Connection cylinder portion 93a · · Operation portion 94 · · Hole 94a · · Female screw portion 95 · · 95a · · female screw · · · 96 · · male screw

100・・温度式膨張弁(従来) 110・・弁本体 120・・通路
122・・弁室 124・・弁座 126・・通路 128・・戻り通路
130・・弁体 132・・弁体受け部材 134・・スプリング
136・・ナット部材 137・・ねじ部 138・・六角穴
139・・シール部材 140・・作動棒 142・・シール部材
150・・ストッパ部材 160・・パワーエレメント 161・・上蓋
162・・下蓋 163・・キャン体 164・・ねじ部
166・・ダイアフラム 168・・上部圧力室 169・・下部圧力室
170・・栓体
100..Temperature expansion valve (conventional) 110..Valve body 120..Passage 122..Valve chamber 124..Valve seat 126..Passage 128..Return passage 130..Valve element 132..Valve receiving member 134 ··· Spring 136 · · Nut member 137 · · Screw part 138 · · Hexagonal hole 139 · · Seal member 140 · · Actuating rod 142 · · Seal member 150 · · Stopper member 160 · · Power element 161 · · Upper lid 162 · -Lower lid 163-Can body 164-Screw part 166-Diaphragm 168-Upper pressure chamber 169-Lower pressure chamber 170-Plug body

200・・温度式膨張弁(従来) 210・・弁本体 211・・弁座部材
212・・穴 213・・突起部 214・・縦穴 216・・穴
220・・第1の通路 222・・弁室 226・・ダイアフラム
226・・第2の通路 228・・第3の通路 230・・弁体
232・・作動棒 234・・シール部材 236・・上端
240・・ストッパ部材 241・・凹部 242・・コイルスプリング
260・・パワーエレメント 262・・キャン体 263・・上蓋
263′・・下蓋 264・・ねじ部 266・・ダイアフラム
268・・上部圧力室 269・・下部圧力室 270・・栓体
200 ·· Temperature expansion valve (conventional) 210 · · Valve body 211 · · Valve seat member 212 · · Hole 213 · · Projection 214 · · Vertical hole 216 · · Hole 220 · · First passage 222 · · Valve chamber 226 ·· Diaphragm 226 ·· Second passage 228 ·· Third passage 230 ·· Valve 232 ·· Operating bar 234 ·· Seal member 236 ·· Upper portion 240 ·· Stopper member 241 ·· Recess portion 242 ·· Coil Spring 260, Power element 262, Can body 263, Upper lid 263 ', Lower lid 264, Screw part 266, Diaphragm 268, Upper pressure chamber 269, Lower pressure chamber 270, Plug body

Claims (6)

弁本体に支持される作動棒と、作動棒の移動によりオリフィス部に対して開閉する弁体と、ダイアフラムの上下動により移動するストッパ部材と、を具備する温度式膨張弁において、上記ダイアフラムに対する上記作動棒の相対位置を変更可能としたことを特徴とする温度式膨張弁。   A thermal expansion valve comprising: an operating rod supported by a valve body; a valve body that opens and closes with respect to an orifice portion by movement of the operating rod; and a stopper member that moves by vertical movement of the diaphragm. A temperature-type expansion valve characterized in that the relative position of the operating rod can be changed. ストッパ部材に対する作動棒の相対位置を変更可能としたことを特徴とする請求項1記載の温度式膨張弁。   The temperature type expansion valve according to claim 1, wherein the relative position of the operating rod with respect to the stopper member can be changed. ストッパ部材に対して作動棒をネジ結合させたことを特徴とする請求項2記載の温度式膨張弁。   The temperature type expansion valve according to claim 2, wherein the operating rod is screwed to the stopper member. ストッパ部材を上下の二部材から構成し、該二部材を作動棒の移動方向において相対距離を変更可能としたことを特徴とする請求項1記載の温度式膨張弁。   The temperature type expansion valve according to claim 1, wherein the stopper member is composed of two upper and lower members, and the relative distance of the two members can be changed in the moving direction of the operating rod. 上記二部材をネジ結合させたことを特徴とする請求項4記載の温度式膨張弁。   The temperature type expansion valve according to claim 4, wherein the two members are screwed together. 上記弁体は、上記弁本体に形成された弁室内でスプリングにより上記オリフィス部側に押圧され、且つ、前記弁体は前記作動棒によりスプリング側に押圧されることを特徴とする請求項1乃至請求項5記載のいずれかの温度式膨張弁。   The valve body is pressed toward the orifice portion by a spring in a valve chamber formed in the valve body, and the valve body is pressed toward the spring side by the operating rod. The temperature type expansion valve according to claim 5.
JP2004059355A 2004-03-03 2004-03-03 Thermal expansion valve Expired - Fee Related JP4335713B2 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011108823A2 (en) * 2010-03-05 2011-09-09 학교법인 두원학원 Expansion valve for a vehicle air conditioning device
CN102252469A (en) * 2010-05-20 2011-11-23 浙江三花汽车零部件有限公司 Thermal expansion valve
CN102619998A (en) * 2011-01-26 2012-08-01 浙江三花汽车零部件股份有限公司 Thermal expansion valve
JP2012229885A (en) * 2011-04-27 2012-11-22 Saginomiya Seisakusho Inc Temperature expansion valve
JP2022152982A (en) * 2021-03-29 2022-10-12 株式会社不二工機 Power element and expansion valve using the same

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011108823A2 (en) * 2010-03-05 2011-09-09 학교법인 두원학원 Expansion valve for a vehicle air conditioning device
WO2011108823A3 (en) * 2010-03-05 2011-11-03 학교법인 두원학원 Expansion valve for a vehicle air conditioning device
CN102252469A (en) * 2010-05-20 2011-11-23 浙江三花汽车零部件有限公司 Thermal expansion valve
CN102619998A (en) * 2011-01-26 2012-08-01 浙江三花汽车零部件股份有限公司 Thermal expansion valve
JP2012229885A (en) * 2011-04-27 2012-11-22 Saginomiya Seisakusho Inc Temperature expansion valve
JP2022152982A (en) * 2021-03-29 2022-10-12 株式会社不二工機 Power element and expansion valve using the same
JP7373857B2 (en) 2021-03-29 2023-11-06 株式会社不二工機 Power element and expansion valve using it

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