JP2014173788A - Temperature type expansion valve - Google Patents
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Abstract
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温度式膨張弁に関する。 The present invention relates to a temperature type 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.
この種の温度式膨張弁にあっては、蒸発器へ送られる冷媒の流量を制御する弁機構を備える冷媒の通路と、蒸発器から圧縮機側へ戻る冷媒の戻り通路を有する弁本体を備える。そして、弁本体の戻り通路の上部に装備される弁体の駆動装置であるパワーエレメントにより操作される作動棒が蒸発器へ向かう冷媒の通路と戻り通路を貫通して弁室内の弁体に当接して弁の開度を制御する。 This type of temperature expansion valve includes a valve body having a refrigerant passage having a valve mechanism for controlling the flow rate of the refrigerant sent to the evaporator, and a refrigerant return passage returning from the evaporator to the compressor side. . Then, an operating rod operated by a power element, which is a valve element driving device mounted on the upper part of the return passage of the valve body, passes through the refrigerant passage and return passage toward the evaporator and contacts the valve body in the valve chamber. The valve opening is controlled by contact.
下記の特許文献１は、作動棒の外周部に防振部材（防振ばね）を配置して高圧冷媒の圧力変動に対する弁動作を安定させることを開示している。 The following Patent Document 1 discloses that a vibration-proof member (vibration-proof spring) is disposed on the outer peripheral portion of the operating rod to stabilize the valve operation against the pressure fluctuation of the high-pressure refrigerant.
本発明の目的は、防振部材の防振性能を向上することによって、膨張弁としての動作の安定化を更に向上させることにある。 An object of the present invention is to further improve the stabilization of the operation as an expansion valve by improving the vibration isolation performance of the vibration isolation member.
上記目的を達成するために、本発明の温度式膨張弁は、エバポレータから戻ってくる冷媒の温度及び圧力に感応して冷媒の絞り・膨張を行う弁部材の弁リフトを制御するパワーエレメントを弁本体に備え、前記弁本体は、コンプレッサ及びコンデンサを経て供給される高圧冷媒用の高圧入口側流路と、該高圧入口側流路に連通する弁室と、該弁室に連通するとともに弁座を有する弁孔と、該弁孔で膨張した冷媒をエバポレータに向けて導出する低圧出口側流路と、前記エバポレータから戻ってくる冷媒を通過させる戻り冷媒通路とを備える。 In order to achieve the above object, the temperature type expansion valve of the present invention has a power element that controls the valve lift of a valve member that throttles and expands the refrigerant in response to the temperature and pressure of the refrigerant returning from the evaporator. The valve body includes a high-pressure inlet side passage for high-pressure refrigerant supplied via a compressor and a condenser, a valve chamber communicating with the high-pressure inlet side passage, a valve seat communicating with the valve chamber, and a valve seat , A low-pressure outlet-side flow path for leading the refrigerant expanded in the valve hole toward the evaporator, and a return refrigerant passage for allowing the refrigerant returning from the evaporator to pass therethrough.
そして、前記弁座に対向して前記弁室内に配置される前記弁部材を開閉させるべく前記パワーエレメントの作動に追従して進退する作動棒と、該作動棒の外周に嵌装されて該作動棒の振動を防止する防振部材とが備わっており、該防振部材は、細長い板状の弾性素材を環状に弾性変形させた環状部と、弾性素材の一部に切り込みを入れて内側に折り曲げて形成する複数本の防振ばねを有し、上記防振ばねは、上記作動棒の軸方向に２段組に設定してあることを特徴とする。 And an operating rod that advances and retreats following the operation of the power element to open and close the valve member disposed in the valve chamber so as to face the valve seat; And a vibration isolating member for preventing vibration of the rod. The vibration isolating member includes an annular portion obtained by elastically deforming an elongated plate-like elastic material in an annular shape, and a part of the elastic material is cut inwardly. A plurality of anti-vibration springs formed by bending are provided, and the anti-vibration springs are set in a two-stage set in the axial direction of the operating rod.
本発明の温度式膨張弁は以上の手段を備えることにより、防振部材が作動棒に対して適切な摩擦抵抗を発生させて、振動を防止する。 The temperature type expansion valve of the present invention is provided with the above-described means, so that the vibration isolation member generates an appropriate frictional resistance against the operating rod to prevent vibration.
図１は、本発明を適用する冷凍サイクルの概要と温度式膨張弁の構成を示す説明図である。
コンプレッサ１で加圧された冷媒は、コンデンサ２で液化され、膨張弁３に送られる。膨張弁３で断熱膨張した冷媒はエバポレータ４に送り出され、エバポレータ４で熱交換される。エバポレータ４から戻る冷媒は膨張弁３を通ってコンプレッサ１側へ戻される。
FIG. 1 is an explanatory diagram showing an outline of a refrigeration cycle to which the present invention is applied and a configuration of a temperature type expansion valve.
The refrigerant pressurized by the compressor 1 is liquefied by the condenser 2 and sent to the expansion valve 3. The refrigerant adiabatically expanded by the expansion valve 3 is sent to the evaporator 4, and heat is exchanged by the evaporator 4. The refrigerant returning from the evaporator 4 is returned to the compressor 1 through the expansion valve 3.
温度式膨張弁３は弁本体１０を有し、コンデンサ２からの高圧の冷媒が供給される高圧冷媒入口側通路２０に連通する弁室２２を備える。
弁室２２内には弁部材４０が弁座２４に対向して配置され、弁部材４０はサポート４２に支持され、サポート４２はスプリング４４を介して弁室２２を封止するプラグ４６で支持される。弁部材４０と弁座２４の間で流量を制御された冷媒は、弁孔２６、低圧出口側通路２８を通ってエバポレータ４へ送り出される。
The temperature type expansion valve 3 has a valve body 10 and includes a valve chamber 22 communicating with a high-pressure refrigerant inlet side passage 20 to which a high-pressure refrigerant from the condenser 2 is supplied.
A valve member 40 is disposed in the valve chamber 22 so as to face the valve seat 24, the valve member 40 is supported by a support 42, and the support 42 is supported by a plug 46 that seals the valve chamber 22 via a spring 44. The The refrigerant whose flow rate is controlled between the valve member 40 and the valve seat 24 is sent to the evaporator 4 through the valve hole 26 and the low-pressure outlet side passage 28.
エバポレータ４から出た冷媒は、弁本体１０の戻り冷媒通路３０を通過してコンプレッサ１へ戻される。弁本体１０の頂部にはパワーエレメント５０が装備されている。 The refrigerant discharged from the evaporator 4 passes through the return refrigerant passage 30 of the valve body 10 and is returned to the compressor 1. A power element 50 is mounted on the top of the valve body 10.
パワーエレメント５０はダイアフラム５４で形成される作動ガス室５２を有し、ダイアフラム５４の下面は支持部材５６で支持される。ダイアフラム５４の下面には戻り冷媒通路３０の冷媒が開口部３２を介して作用する。 The power element 50 has a working gas chamber 52 formed by a diaphragm 54, and the lower surface of the diaphragm 54 is supported by a support member 56. The refrigerant in the return refrigerant passage 30 acts on the lower surface of the diaphragm 54 through the opening 32.
ダイアフラム５４の変位は支持部材５６を介して作動棒６０に伝達され、作動棒６０は弁部材４０を操作する。作動棒６０は細い棒状の部材であって、弁本体１０に形成した貫通穴７０に挿入される。作動棒６０は貫通穴７０内で摺動するので、作動棒６０の振動を防止するために、防振部材挿入穴７２が形成されて防振部材挿入穴７２内に防振部材１００が嵌装される。 The displacement of the diaphragm 54 is transmitted to the operating rod 60 through the support member 56, and the operating rod 60 operates the valve member 40. The operating rod 60 is a thin rod-like member, and is inserted into a through hole 70 formed in the valve body 10. Since the operating rod 60 slides in the through hole 70, in order to prevent vibration of the operating rod 60, a vibration isolating member insertion hole 72 is formed and the vibration isolating member 100 is fitted in the vibration isolating member insertion hole 72. Is done.
図２は、防振部材１００の折曲げ前の状態を示す展開平面図である。
防振部材１００は、細長い弾性金属板である素材板１１０にプレス加工や折り曲げ加工、湾曲加工を施して製造される部材である。
FIG. 2 is a developed plan view showing a state before the vibration isolating member 100 is bent.
The anti-vibration member 100 is a member manufactured by subjecting a material plate 110, which is an elongated elastic metal plate, to pressing, bending, or bending.
素材板１１０の長手方向の一方側の端部には舌片１１２を有し、長手方向の反対側の端部には、素材板１１０を円筒形状に湾曲させたときに舌片１１２を受け入れる舌片受け部１１４が形成される。凸部１１６は素材板１１０を円筒形状に湾曲加工するときなどに使用される。 A tongue 112 is provided at one end in the longitudinal direction of the material plate 110, and a tongue for receiving the tongue 112 when the material plate 110 is curved into a cylindrical shape at the opposite end in the longitudinal direction. A single receiving portion 114 is formed. The convex portion 116 is used when the material plate 110 is bent into a cylindrical shape.
素材板１１０には、２段組の防振ばねが長手方向（周方向）に３ヶ所の切込み加工により形成されている。
第１の２段組の防振ばね１２０、１２４は切込み１２８により形成され、防振ばね１２０、１２４の各先端部には凸状当接部１２２、１２６がプレス加工により設けられる。
第２の２段組の防振ばね１３０、１３４は切込み１３８により形成され、防振ばね１３０、１３４の各先端部には凸状当接部１３２、１３６がプレス加工により設けられる。
第３の２段組の防振ばね１４０、１４４は切込み１４８により形成され、防振ばね１４０、１４４の各先端部には凸状当接部１４２、１４６がプレス加工により設けられる。
On the material plate 110, two-stage vibration-proof springs are formed by cutting at three locations in the longitudinal direction (circumferential direction).
The first two-stage anti-vibration springs 120 and 124 are formed by notches 128, and convex contact portions 122 and 126 are provided by pressing at the respective distal ends of the anti-vibration springs 120 and 124.
The second two-stage vibration isolating springs 130 and 134 are formed by cuts 138, and convex contact portions 132 and 136 are provided at the respective distal ends of the vibration isolating springs 130 and 134 by pressing.
The third two-stage vibration isolating springs 140 and 144 are formed by notches 148, and convex contact portions 142 and 146 are provided by press working at the respective end portions of the anti-vibration springs 140 and 144.
図２に示す防振部材１００は、図３に示すように円筒形状に湾曲させて使用される。すなわち、第１の２段組の防振ばね１２０、１２４、第２の２段組の防振ばね１３０、１３４、第３の２段組の防振ばね１４０、１４４を内側に折り曲げられて防振部材１００が完成する。舌片１１２は舌片受け部１１４に重ね合わされて、外周面は滑らかな円筒形を形成する。 The anti-vibration member 100 shown in FIG. 2 is used by being bent into a cylindrical shape as shown in FIG. That is, the first two-stage vibration isolation springs 120 and 124, the second two-stage vibration isolation springs 130 and 134, and the third two-stage vibration isolation springs 140 and 144 are folded inward to prevent vibration. The vibration member 100 is completed. The tongue piece 112 is superimposed on the tongue piece receiving portion 114, and the outer peripheral surface forms a smooth cylindrical shape.
第１の２段組の防振ばね１２０、１２４、第２の２段組の防振ばね１３０、１３４、第３の２段組の防振ばね１４０、１４４は内側に折り曲げられるが、凸状当接部１２２、１２６、凸状当接部１３２、１３６、凸状当接部１４２、１４６は、円周を３等分した位置になるように設計されている。そして、凸状当接部１２２、１２６、凸状当接部１３２、１３６、凸状当接部１４２、１４６の頂部を結ぶ円の直径寸法は、作動棒６０の直径寸法より小さな寸法に形成される。 The first two-stage anti-vibration springs 120 and 124, the second two-stage anti-vibration springs 130 and 134, and the third two-stage anti-vibration springs 140 and 144 are folded inward but are convex. The abutting portions 122 and 126, the convex abutting portions 132 and 136, and the convex abutting portions 142 and 146 are designed to be at positions obtained by dividing the circumference into three equal parts. The diameter of the circle connecting the tops of the convex contact portions 122 and 126, the convex contact portions 132 and 136, and the convex contact portions 142 and 146 is formed to be smaller than the diameter size of the actuating rod 60. The
図４に示すように、防振部材１００は防振部材挿入穴７２内に挿入した状態で、カシメ加工部Ｋ１により防振部材挿入穴７２内に固定される。
作動棒６０は、防振部材１００の第１の２段組の防振ばね１２０、１２４、第２の２段組の防振ばね１３０、１３４、第３の２段組の防振ばね１４０、１４６内に挿入されて、パワーエレメント５０の作用により上下に変位する。作動棒６０は、第１の２段組の防振ばね１２０、１２４、第２の２段組の防振ばね１３０、１３４、第３の２段組の防振ばね１４０、１４４の合計６枚のばね力により安定的に支持され、防振作用を効果的に発揮する。
As shown in FIG. 4, the vibration isolation member 100 is fixed in the vibration isolation member insertion hole 72 by the caulking processing portion K <b> 1 while being inserted in the vibration isolation member insertion hole 72.
The actuating rod 60 includes a first two-stage vibration isolation spring 120, 124, a second two-stage vibration isolation spring 130, 134, a third two-stage vibration isolation spring 140, It is inserted into 146 and displaced up and down by the action of the power element 50. The actuating rod 60 includes a total of six anti-vibration springs 120 and 124 of the first two-stage set, anti-vibration springs 130 and 134 of the second two-stage set, and anti-vibration springs 140 and 144 of the third two-stage set. It is stably supported by the spring force of and effectively exhibits the anti-vibration action.
なお、上述した実施例においては、３本の防振ばねを２段組にした例を示したが、防振ばねの本数は４本など適宜に選択できる。 In the above-described embodiment, an example in which three anti-vibration springs are arranged in two stages is shown, but the number of anti-vibration springs can be appropriately selected such as four.
本発明の温度式膨張弁によれば、作動棒の防振性が更に向上し、高圧冷媒の圧力変動に対する動作安定性が更に高まる。 According to the temperature type expansion valve of the present invention, the vibration isolation of the operating rod is further improved, and the operational stability against the pressure fluctuation of the high-pressure refrigerant is further increased.
１ コンプレッサ
２ コンデンサ
３ 温度式膨張弁
４ エバポレータ
１０ 弁本体
２０ 高圧冷媒入口側通路
２２ 弁室
２４ 弁座
２６ 弁孔
２８ 低圧出口側通路
３０ 戻り冷媒側通路
３２ 開口部
４０ 弁部材
４２ サポート
４４ スプリング
４６ プラグ
５０ パワーエレメント
５２ 作動ガス室
５４ ダイアフラム
５６ 支持部材
６０ 作動棒
７０ 貫通穴
７２ 防振部材挿入穴
１００ 防振部材
１１０ 素材板
１１２ 舌片
１１４ 舌片受け部
１２０、１２４ 第１の２段組の防振ばね
１３０、１３４ 第２の２段組の防振ばね
１４０、１４４ 第３の２段組の防振ばね
DESCRIPTION OF SYMBOLS 1 Compressor 2 Capacitor 3 Thermal expansion valve 4 Evaporator 10 Valve body 20 High pressure refrigerant inlet side passage 22 Valve chamber 24 Valve seat 26 Valve hole 28 Low pressure outlet side passage 30 Return refrigerant side passage 32 Opening 40 Valve member 42 Support 44 Spring 46 Plug 50 Power element 52 Working gas chamber 54 Diaphragm 56 Support member 60 Actuating rod 70 Through hole 72 Anti-vibration member insertion hole 100 Anti-vibration member 110 Material plate 112 Tongue piece 114 Tongue piece receiving part 120, 124 First two-stage set Anti-vibration springs 130, 134 Second two-stage anti-vibration springs 140, 144 Third two-stage anti-vibration springs
Claims (1)
前記弁本体は、コンプレッサ及びコンデンサを経て供給される高圧冷媒用の高圧入口側流路と、該高圧入口側流路に連通する弁室と、該弁室に連通するとともに弁座を有する弁孔と、該弁孔で膨張した冷媒をエバポレータに向けて導出する低圧出口側流路と、前記エバポレータから戻ってくる冷媒を通過させる戻り冷媒通路とを備え、
前記弁座に対向して前記弁室内に配置される前記弁部材を開閉させるべく前記パワーエレメントの作動に追従して進退する作動棒と、該作動棒の外周に嵌装されて該作動棒の振動を防止する防振部材とが備わっており、
該防振部材は、細長い板状の弾性素材を環状に弾性変形させた環状部と、弾性素材の一部に切り込みを入れて内側に折り曲げて形成する複数本の防振ばねを有し、
上記防振ばねは、上記作動棒の軸方向に２段組となるように配列させてある
ことを特徴とする温度式膨張弁。 A temperature type expansion valve having a power element for controlling a valve lift of a valve member that throttles and expands the refrigerant in response to the temperature and pressure of the refrigerant returning from the evaporator,
The valve body has a high-pressure inlet-side flow path for high-pressure refrigerant supplied via a compressor and a condenser, a valve chamber communicating with the high-pressure inlet-side flow path, and a valve hole communicating with the valve chamber and having a valve seat And a low-pressure outlet-side flow path for deriving the refrigerant expanded in the valve hole toward the evaporator, and a return refrigerant passage for allowing the refrigerant returning from the evaporator to pass through,
An operating rod that advances and retreats following the operation of the power element to open and close the valve member disposed in the valve chamber facing the valve seat, and is fitted on the outer periphery of the operating rod, With anti-vibration members to prevent vibration,
The vibration-proof member has an annular portion obtained by elastically deforming an elongated plate-like elastic material in an annular shape, and a plurality of vibration-proof springs formed by cutting a part of the elastic material and bending it inside.
The temperature-type expansion valve, wherein the vibration-proof springs are arranged in a two-stage set in the axial direction of the operating rod.
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Cited By (5)
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| CN105485980A (en) * | 2014-10-01 | 2016-04-13 | 株式会社Tgk | Control valve |
| JP2018025332A (en) * | 2016-08-09 | 2018-02-15 | 株式会社不二工機 | Expansion valve |
| CN109210208A (en) * | 2017-06-29 | 2019-01-15 | 株式会社不二工机 | expansion valve |
| JP2020118444A (en) * | 2016-08-09 | 2020-08-06 | 株式会社不二工機 | Expansion valve |
| JP2020176723A (en) * | 2016-08-31 | 2020-10-29 | 株式会社不二工機 | Expansion valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6697975B2 (en) * | 2016-08-09 | 2020-05-27 | 株式会社不二工機 | Expansion valve |
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| JP2006003056A (en) * | 2003-11-06 | 2006-01-05 | Fuji Koki Corp | Expansion valve |
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| CN105485980B (en) * | 2014-10-01 | 2019-01-15 | 株式会社Tgk | control valve |
| JP2018025332A (en) * | 2016-08-09 | 2018-02-15 | 株式会社不二工機 | Expansion valve |
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| CN109564041A (en) * | 2016-08-09 | 2019-04-02 | 株式会社不二工机 | Expansion valve |
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| JP2020176723A (en) * | 2016-08-31 | 2020-10-29 | 株式会社不二工機 | Expansion valve |
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| CN109210208B (en) * | 2017-06-29 | 2021-11-02 | 株式会社不二工机 | Expansion valve |
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