JP7011547B2 - Solenoid valve and refrigeration cycle system - Google Patents

Solenoid valve and refrigeration cycle system Download PDF

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Publication number
JP7011547B2
JP7011547B2 JP2018129232A JP2018129232A JP7011547B2 JP 7011547 B2 JP7011547 B2 JP 7011547B2 JP 2018129232 A JP2018129232 A JP 2018129232A JP 2018129232 A JP2018129232 A JP 2018129232A JP 7011547 B2 JP7011547 B2 JP 7011547B2
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valve
washer
operating shaft
insertion hole
rotor shaft
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JP2020008087A (en
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誠一 中野
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Saginomiya Seisakusho Inc
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Saginomiya Seisakusho Inc
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Priority to JP2018129232A priority Critical patent/JP7011547B2/en
Priority to CN202111295945.7A priority patent/CN113932022B/en
Priority to CN201910522125.3A priority patent/CN110686084A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • F25B41/35—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by rotary motors, e.g. by stepping motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/06—Details of flow restrictors or expansion valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Description

本発明は、冷凍サイクルなどに使用する電動弁及び冷凍サイクルシステムに関する。 The present invention relates to an electric valve and a refrigeration cycle system used for a refrigeration cycle or the like.

従来、この種の電動弁として、モータ部の作動軸に連結された弁部材で弁ポートを開閉するものがある。このような電動弁は例えば特開２０１７－１６１０５２号公報（特許文献１）に開示されている。また、この特許文献１の電動弁は、弁部材を保持する弁ホルダ部（弁ガイド）と作動軸（弁軸）とを連結するために、弁ホルダ部内に作動軸のフランジ部を設け、弁ホルダ部の端部とフランジ部との間にワッシャを介在させるようにしている。なお、このワッシャは、作動軸が回動することから、この作動軸と弁ホルダ部とを相互に回動自在とするために設けたものである。 Conventionally, as this kind of electric valve, there is a valve member connected to the operating shaft of the motor unit to open and close the valve port. Such an electric valve is disclosed in, for example, Japanese Patent Application Laid-Open No. 2017-161052 (Patent Document 1). Further, in the electric valve of Patent Document 1, in order to connect the valve holder portion (valve guide) for holding the valve member and the operating shaft (valve shaft), a flange portion of the operating shaft is provided in the valve holder portion, and the valve is valved. A washer is interposed between the end of the holder and the flange. Since the operating shaft rotates, this washer is provided so that the operating shaft and the valve holder portion can rotate with each other.

特開２０１７－１６１０５２号公報Japanese Unexamined Patent Publication No. 2017-161052

上述した特許文献１の技術では、図１５に示すように、作動軸であるロータ軸８の端部のボス部８１に形成されたフランジ部８２を、弁ホルダ部のガイド管９２内に設け、ガイド管９２の上端の天井部９２ａとフランジ部８２との間にワッシャ９１を噛ませるように配置されている。しかしながら、ロータ軸８の加工時の加工精度上、ロータ軸８のボス部８１とフランジ部８２との入隅にＲ部８Ｒができてしまうことがある。このような場合、ロータ軸８とガイド管９２（弁ホルダ部）との間で横ずれが生じた際に、ワッシャ９１がＲ部８Ｒに乗り上げ、ロータ軸８に対してガイド管９２（及び弁体）が傾斜することにより、作動性が悪化する虞があった。 In the technique of Patent Document 1 described above, as shown in FIG. 15, a flange portion 82 formed in the boss portion 81 at the end of the rotor shaft 8 which is the operating shaft is provided in the guide pipe 92 of the valve holder portion. The washer 91 is arranged so as to bite between the ceiling portion 92a at the upper end of the guide pipe 92 and the flange portion 82. However, due to the machining accuracy of the rotor shaft 8 during machining, the R portion 8R may be formed at the inner corner between the boss portion 81 and the flange portion 82 of the rotor shaft 8. In such a case, when a lateral displacement occurs between the rotor shaft 8 and the guide pipe 92 (valve holder portion), the washer 91 rides on the R portion 8R, and the guide pipe 92 (and the valve body) with respect to the rotor shaft 8 ) May deteriorate in operability.

本発明は、弁部材を保持して作動軸のフランジ部に連結される弁ホルダ部を備えた電動弁において、弁ホルダ部のワッシャを作動軸のフランジ部に対して常時確実に当接させて、安定した作動性を確保することを課題とする。 According to the present invention, in an electric valve provided with a valve holder portion that holds a valve member and is connected to the flange portion of the operating shaft, the washer of the valve holder portion is always and surely brought into contact with the flange portion of the operating shaft. The challenge is to ensure stable operability.

請求項１の電動弁は、モータ部の作動軸に連動する弁部材により弁ポートを開閉する電動弁であって、前記作動軸の端部の外周にフランジ部が形成されるとともに、前記弁部材を保持して前記作動軸の前記フランジ部に連結される弁ホルダ部を備えた電動弁において、前記弁ホルダ部は、前記作動軸を嵌挿する挿通孔を有するワッシャを、円筒状のガイド管の端部に形成された環状の天井部と前記フランジ部との間に配設して構成され、前記ワッシャは、前記弁ポート側の面に、前記フランジ部の前記モータ部側の面が当接し、前記モータ部側の面に、前記天井部の前記弁ポート側の面が当接し、前記作動軸における前記挿通孔に嵌挿される側面と前記フランジ部の前記ワッシャに対する当接面とが成す入隅部と、前記ワッシャにおける前記挿通孔の内周面と前記フランジ部に対する当接面部とが成す出隅部と、の少なくとも一方に、他方から後退した後退部が設けられている、ことを特徴とする。 The electric valve according to claim 1 is an electric valve that opens and closes a valve port by a valve member interlocked with the operating shaft of the motor portion, and has a flange portion formed on the outer periphery of an end portion of the operating shaft and the valve member. In an electric valve provided with a valve holder portion connected to the flange portion of the operating shaft, the valve holder portion has a washer having an insertion hole into which the operating shaft is inserted, and a cylindrical guide tube. The washer is configured to be disposed between the annular ceiling portion formed at the end portion of the washer and the flange portion, and the washer has a surface on the valve port side and a surface on the motor portion side of the flange portion. The surface on the valve port side of the ceiling portion comes into contact with the surface on the motor portion side, and the side surface fitted into the insertion hole in the operating shaft and the contact surface of the flange portion with respect to the washer form. At least one of the inside corner portion and the outside corner portion formed by the inner peripheral surface of the insertion hole in the washer and the contact surface portion with respect to the flange portion is provided with a retracting portion retracted from the other. It is a feature.

請求項２の電動弁は、請求項１に記載の電動弁であって、前記後退部は、前記作動軸における前記入隅部に設けられた凹部によって構成されていることを特徴とする。 The motorized valve according to claim 2 is the motorized valve according to claim 1, wherein the retracting portion is formed by a recess provided in the inner corner portion of the operating shaft.

請求項３の電動弁は、請求項１に記載の電動弁であって、前記後退部は、前記ワッシャにおける前記出隅部に設けられた凹部によって構成されていることを特徴とする。 The motorized valve according to claim 3 is the motorized valve according to claim 1, wherein the retracting portion is formed by a recess provided in the protruding corner portion of the washer.

請求項４の電動弁は、請求項３に記載の電動弁であって、前記凹部が、段差部または面取部またはＲ面部であることを特徴とする。 The electric valve according to claim 4 is the electric valve according to claim 3, wherein the recess is a stepped portion, a chamfered portion, or an R surface portion.

請求項５の電動弁は、請求項４に記載の電動弁であって、前記凹部の高さが、前記作動軸における前記入隅部のＲ部の半径より大きいことを特徴とする。 The motorized valve according to claim 5 is the motorized valve according to claim 4, wherein the height of the recess is larger than the radius of the R portion of the inside corner portion of the operating shaft.

請求項６の電動弁は、請求項５に記載の電動弁であって、前記凹部が、前記ワッシャにおける前記出隅部と、前記ワッシャの前記挿通孔の内周面における前記天井部側と、に形成されていることを特徴とする。 The motorized valve according to claim 6 is the motorized valve according to claim 5, wherein the recess is the protruding corner portion of the washer and the ceiling portion side of the inner peripheral surface of the insertion hole of the washer. It is characterized by being formed in.

請求項７の冷凍サイクルシステムは、圧縮機と、凝縮器と、膨張弁と、蒸発器と、を含む冷凍サイクルシステムであって、請求項１乃至６のいずれか一項に記載の電動弁が、前記膨張弁として用いられていることを特徴とする。 The refrigerating cycle system according to claim 7 is a refrigerating cycle system including a compressor, a condenser, an expansion valve, and an evaporator, wherein the electric valve according to any one of claims 1 to 6 is used. , The feature is that it is used as the expansion valve.

請求項１乃至６の電動弁によれば、作動軸における入隅部と、ワッシャにおける出隅部との少なくとも一方に後退部が設けられているので、この入隅部と出隅部とが干渉することがない。したがって、作動軸と弁ホルダ部との間で横ずれが生じたとしても、作動軸に対して弁ホルダ部及び弁部材が傾斜することがなく、弁ホルダ部のワッシャを作動軸のフランジ部に対して常時確実に当接させることができ、安定した作動性を確保することができる。 According to the motorized valves of claims 1 to 6, since a retracting portion is provided on at least one of the inside corner portion in the operating shaft and the outside corner portion in the washer, the inside corner portion and the outside corner portion interfere with each other. There is nothing to do. Therefore, even if lateral displacement occurs between the operating shaft and the valve holder, the valve holder and the valve member do not tilt with respect to the operating shaft, and the washer of the valve holder is attached to the flange of the operating shaft. It is possible to make contact with each other reliably at all times, and stable operability can be ensured.

請求項７の冷凍サイクルシステムによれば、請求項１乃至６と同様な効果が得られる。 According to the refrigeration cycle system of claim 7, the same effect as that of claims 1 to 6 can be obtained.

本発明の第１実施形態の電動弁の縦断面図である。It is a vertical sectional view of the electric valve of 1st Embodiment of this invention. 第１実施形態の電動弁の要部拡大図である。It is an enlarged view of the main part of the electric valve of 1st Embodiment. 図２の一点鎖線の円で示す部分の一部拡大図である。It is a partially enlarged view of the part shown by the circle of the alternate long and short dash line in FIG. 2. 第１実施形態におけるロータ軸の入隅部とワッシャの出隅部とを説明する要部拡大断面図である。FIG. 3 is an enlarged cross-sectional view of a main part for explaining an inside corner portion of a rotor shaft and an outside corner portion of a washer in the first embodiment. 第１実施形態における「後退部」の変形例１を示す図である。It is a figure which shows the modification 1 of the "recession part" in 1st Embodiment. 第１実施形態における「後退部」の変形例２を示す図である。It is a figure which shows the modification 2 of the "recession part" in 1st Embodiment. 第１実施形態における「後退部」の変形例３を示す図である。It is a figure which shows the modification 3 of the "recession part" in 1st Embodiment. 本発明の第２実施形態の電動弁の要部拡大図である。It is an enlarged view of the main part of the electric valve of the 2nd Embodiment of this invention. 図８の一点鎖線の円で示す部分の一部拡大図である。It is a partially enlarged view of the part shown by the circle of the alternate long and short dash line in FIG. 第２実施形態における「後退部」の変形例４を示す図である。It is a figure which shows the modification 4 of the "recession part" in 2nd Embodiment. 第２実施形態における「後退部」の変形例５を示す図である。It is a figure which shows the modification 5 of the "recession part" in 2nd Embodiment. 第２実施形態における「後退部」の変形例６を示す図である。It is a figure which shows the modification 6 of the "recession part" in 2nd Embodiment. 実施形態におけるワッシャの変形例を示す図である。It is a figure which shows the modification of the washer in an embodiment. 実施形態の冷凍サイクルシステムを示す図である。It is a figure which shows the refrigeration cycle system of an embodiment. 従来の電動弁における問題点を説明する図である。It is a figure explaining the problem in the conventional electric valve.

次に、本発明の電動弁及び冷凍サイクルシステムの実施形態を図面を参照して説明する。図１は第１実施形態の電動弁の縦断面図、図２は第１実施形態の電動弁の要部拡大図、図３は図２の一点鎖線の円で示す部分の一部拡大図、図４は第１実施形態におけるロータ軸の入隅部とワッシャの出隅部とを説明する要部拡大断面図である。なお、以下の説明における「上下」の概念は図１の図面における上下に対応する。 Next, an embodiment of the motorized valve and the refrigeration cycle system of the present invention will be described with reference to the drawings. FIG. 1 is a vertical cross-sectional view of the motorized valve of the first embodiment, FIG. 2 is an enlarged view of a main part of the motorized valve of the first embodiment, and FIG. FIG. 4 is an enlarged cross-sectional view of a main part for explaining the inside corner portion of the rotor shaft and the outside corner portion of the washer in the first embodiment. The concept of "upper and lower" in the following description corresponds to the upper and lower parts in the drawing of FIG.

この電動弁１００は、ロータ軸１と、弁ホルダ部２と、「弁部材」としてのニードル弁３と、「モータ部」としてのステッピングモータ１０と、弁ハウジング２０と、非磁性体からなる密閉ケース３０と、支持部材４０とを備えている。弁ハウジング２０と密閉ケース３０とは気密に固着され、ステッピングモータ１０は密閉ケース３０の内外に構成されている。ステッピングモータ１０は、密閉ケース３０の内部に回転可能に配設されたマグネットロータ１０ａと、密閉ケース３０の外周においてマグネットロータ１０ａに対して対向配置されたステータコイル１０ｂと、その他、図示しないヨークや外装部材等により構成されている。ロータ軸１はブッシュを介してマグネットロータ１０ａの中心に取り付けられ、このロータ軸１の支持部材４０側の外周には雄ねじ部１ａが形成されている。そして、このロータ軸１の下端に後述の弁ホルダ部２が取り付けられている。なお、密閉ケース３０内の上部にはマグネットロータ１０ａの突起に連動してマグネットロータ１０ａの回転を規制する回転ストッパ機構３０ａが設けられている。 The motorized valve 100 is hermetically sealed including a rotor shaft 1, a valve holder portion 2, a needle valve 3 as a "valve member", a stepping motor 10 as a "motor portion", a valve housing 20, and a non-magnetic material. It includes a case 30 and a support member 40. The valve housing 20 and the closed case 30 are airtightly fixed, and the stepping motor 10 is configured inside and outside the closed case 30. The stepping motor 10 includes a magnet rotor 10a rotatably arranged inside the sealed case 30, a stator coil 10b arranged facing the magnet rotor 10a on the outer circumference of the sealed case 30, and other yokes (not shown). It is composed of exterior members and the like. The rotor shaft 1 is attached to the center of the magnet rotor 10a via a bush, and a male screw portion 1a is formed on the outer periphery of the rotor shaft 1 on the support member 40 side. A valve holder portion 2, which will be described later, is attached to the lower end of the rotor shaft 1. A rotation stopper mechanism 30a that regulates the rotation of the magnet rotor 10a in conjunction with the protrusion of the magnet rotor 10a is provided on the upper portion of the sealed case 30.

弁ハウジング２０はステンレス等で略円筒形状に形成されており、その内側に弁室２０Ｒを有している。弁ハウジング２０の外周片側には弁室２０Ｒに導通される第１継手管５０が接続されるとともに、下端から下方に延びる筒状部に第２継手管６０が接続されている。また、第２継手管６０の弁室２０Ｒ側には弁座部材７０が嵌合されている。弁座部材７０の内側は弁ポート７０ａとなっており、第２継手管６０は弁ポート７０ａを介して弁室２０Ｒに導通される。 The valve housing 20 is made of stainless steel or the like and has a substantially cylindrical shape, and has a valve chamber 20R inside the valve housing 20. A first joint pipe 50 conducting to the valve chamber 20R is connected to one side of the outer circumference of the valve housing 20, and a second joint pipe 60 is connected to a cylindrical portion extending downward from the lower end. Further, a valve seat member 70 is fitted on the valve chamber 20R side of the second joint pipe 60. The inside of the valve seat member 70 is a valve port 70a, and the second joint pipe 60 is conducted to the valve chamber 20R via the valve port 70a.

支持部材４０は例えば合成樹脂製で略円柱形状に形成されており、その外周にはインサート成形により一体に設けられたステンレス製のフランジ部４１を介して弁ハウジング２０の上端部に溶接等により固定されている。支持部材４０の中心には、ロータ軸１の軸線Ｘと同軸の雌ねじ部４０ａとそのねじ孔が形成されるとともに、雌ねじ部４０ａのねじ孔よりも径の大きな円筒状のガイド孔４０ｂが形成されている。そして、支持部材４０及び弁室２０Ｒ内には、弁ホルダ部２とニードル弁３とが設けられ、弁ホルダ部２はロータ軸１の下端に取り付けられている。 The support member 40 is made of synthetic resin, for example, and is formed in a substantially cylindrical shape, and is fixed to the upper end portion of the valve housing 20 by welding or the like via a stainless steel flange portion 41 integrally provided on the outer periphery thereof by insert molding. Has been done. At the center of the support member 40, a female screw portion 40a coaxial with the axis X of the rotor shaft 1 and a screw hole thereof are formed, and a cylindrical guide hole 40b having a diameter larger than that of the screw hole of the female screw portion 40a is formed. ing. A valve holder portion 2 and a needle valve 3 are provided in the support member 40 and the valve chamber 20R, and the valve holder portion 2 is attached to the lower end of the rotor shaft 1.

弁ホルダ部２は、挿通孔２１ａを有する円環状のワッシャ（スラストワッシャ）２１と、円筒状の部材からなるガイド管２２と、バネ受け２３と、コイルバネ２４とを備えている。ガイド管２２は、上端部を内側に曲げることで、挿通孔２２ａを有する円環状の天井部２２ｂを有している。一方、ロータ軸１は、雄ねじ部１ａより下端側の端部にボス部１１を有するとともに、このボス部１１にはフランジ部１２が一体に形成されている。そして、ボス部１１に挿通孔２１ａを嵌め込んでワッシャ２１が取り付けられている。また、ロータ軸１が挿通孔２２ａに嵌め込まれることで、ガイド管２２内に、ワッシャ２１、ボス部１１及びフランジ部１２が収容されている。これにより、ワッシャ２１はガイド管２２の天井部２２ｂとフランジ部１２との間に配設されている。さらに、ガイド管２２内には、バネ受け２３が軸線Ｘ方向に移動可能に設けられ、このバネ受け２３とコイルバネ２４が収容された状態で、このガイド管２２の下端部にニードル弁３が固着されている。 The valve holder portion 2 includes an annular washer (thrust washer) 21 having an insertion hole 21a, a guide tube 22 made of a cylindrical member, a spring receiver 23, and a coil spring 24. The guide tube 22 has an annular ceiling portion 22b having an insertion hole 22a by bending the upper end portion inward. On the other hand, the rotor shaft 1 has a boss portion 11 at an end portion on the lower end side of the male screw portion 1a, and a flange portion 12 is integrally formed with the boss portion 11. Then, the washer 21 is attached by fitting the insertion hole 21a into the boss portion 11. Further, by fitting the rotor shaft 1 into the insertion hole 22a, the washer 21, the boss portion 11, and the flange portion 12 are housed in the guide pipe 22. As a result, the washer 21 is arranged between the ceiling portion 22b of the guide pipe 22 and the flange portion 12. Further, a spring receiver 23 is provided in the guide tube 22 so as to be movable in the axis X direction, and the needle valve 3 is fixed to the lower end portion of the guide tube 22 in a state where the spring receiver 23 and the coil spring 24 are accommodated. Has been done.

以上のようにニードル弁３を有する弁ホルダ部２は、支持部材４０のガイド孔４０ｂ内に嵌合されて軸線Ｘ方向に摺動可能に配設されている。また、ロータ軸１の雄ねじ部１ａが支持部材４０の雌ねじ部４０ａに螺合されており、支持部材４０のガイド孔４０ｂ内で、弁ホルダ部２の上端部がロータ軸１の下端部に係合保持され、弁ホルダ部２及びニードル弁３はロータ軸１によって回転可能に吊り下げた状態で支持されている。 As described above, the valve holder portion 2 having the needle valve 3 is fitted in the guide hole 40b of the support member 40 and slidably arranged in the axis X direction. Further, the male threaded portion 1a of the rotor shaft 1 is screwed into the female threaded portion 40a of the support member 40, and the upper end portion of the valve holder portion 2 engages with the lower end portion of the rotor shaft 1 in the guide hole 40b of the support member 40. The valve holder portion 2 and the needle valve 3 are held together and supported by a rotor shaft 1 in a rotatably suspended state.

以上の構成により、ステッピングモータ１０の駆動により、マグネットロータ１０ａ及びロータ軸１が回転し、ロータ軸１の雄ねじ部１ａと支持部材４０の雌ねじ４０ａとのねじ送り機構により、ロータ軸１が軸線Ｘ方向に移動する。そして、ニードル弁３が軸線Ｘ方向に移動して弁座部材７０に対して近接又は離間する。これにより、弁ポート７０ａが開閉され、第１継手管５０から第２継手管６０へ、あるいは第２継手管６０から第１継手管５０へ流れる冷媒の流量が制御される。 With the above configuration, the magnet rotor 10a and the rotor shaft 1 are rotated by driving the stepping motor 10, and the rotor shaft 1 is rotated by the screw feed mechanism between the male screw portion 1a of the rotor shaft 1 and the female screw 40a of the support member 40. Move in the direction. Then, the needle valve 3 moves in the X direction of the axis and approaches or separates from the valve seat member 70. As a result, the valve port 70a is opened and closed, and the flow rate of the refrigerant flowing from the first joint pipe 50 to the second joint pipe 60 or from the second joint pipe 60 to the first joint pipe 50 is controlled.

図４はロータ軸１に対してワッシャ２１を組み付ける途中の状態を示している。図示のように、ロータ軸１において、フランジ部１２の上部当接面１２ａはボス部１１の外周面の延長面と交差するように、このボス部１１の外周面と上部当接面１２ａとは直角となって入隅部Ａ（一点鎖線で囲った部分）を成している。また、ワッシャ２１において、挿通孔２１ａの内周面とフランジ部１２に対する当接面部である下部当接面２１ｂとは直角となって出隅部Ｂ（一点鎖線で囲った部分）を成している。なお、この入隅部Ａ及び出隅部Ｂについては、後述の変形例及び第２実施形態においても同様であり、変形例及び第２実施形態の説明でも図４を援用する。 FIG. 4 shows a state in which the washer 21 is being assembled to the rotor shaft 1. As shown in the figure, in the rotor shaft 1, the outer peripheral surface of the boss portion 11 and the upper contact surface 12a intersect so that the upper contact surface 12a of the flange portion 12 intersects the extension surface of the outer peripheral surface of the boss portion 11. It forms a right angle and forms the inside corner A (the part surrounded by the alternate long and short dash line). Further, in the washer 21, the inner peripheral surface of the insertion hole 21a and the lower contact surface 21b, which is the contact surface portion with respect to the flange portion 12, form a right angle to form a protruding corner portion B (a portion surrounded by a alternate long and short dash line). There is. The same applies to the inside corner portion A and the outside corner portion B in the modified examples and the second embodiment described later, and FIG. 4 is also incorporated in the description of the modified examples and the second embodiment.

この第１実施形態では、ロータ軸１のボス部１１とフランジ部１２との間に、ボス部１１の外径より縮径された「後退部」としての円環状の水平Ｖ溝１３が形成されている。なお、図３では片側の断面形状だけを示しているが、水平Ｖ溝１３は軸線Ｘ回りの全周に形成された円環状の構造となっている。すなわち、この水平Ｖ溝１３は、ロータ軸１の入隅部Ａにおいてワッシャ２１側の出隅部Ｂから中心側に後退するように設けられている。これにより、図３に示すように、ロータ軸１にワッシャ２１を組み付けた状態で、ワッシャ２１の下部当接面２１ｂがフランジ部１２の上部当接面１２ａに確実に当接されている。 In this first embodiment, an annular horizontal V-groove 13 is formed between the boss portion 11 and the flange portion 12 of the rotor shaft 1 as a “retracting portion” reduced in diameter from the outer diameter of the boss portion 11. ing. Although FIG. 3 shows only the cross-sectional shape on one side, the horizontal V-groove 13 has an annular structure formed on the entire circumference around the axis X. That is, the horizontal V-groove 13 is provided so as to recede toward the center side from the protruding corner portion B on the washer 21 side at the entrance corner portion A of the rotor shaft 1. As a result, as shown in FIG. 3, the lower contact surface 21b of the washer 21 is reliably in contact with the upper contact surface 12a of the flange portion 12 in a state where the washer 21 is assembled to the rotor shaft 1.

以上のように、ロータ軸１の「後退部」としての円環状の水平Ｖ溝１３により、ワッシャ２１側の下部当接面２１ｂを、入隅部Ａと干渉することなくフランジ部１２の上部当接面１２ａに確実に当接させることができる。ロータ軸１と弁ホルダ部２との間で横ずれが生じたとしても、ロータ軸１に対して弁ホルダ部２（及びニードル弁３）が傾斜することがなく、弁ホルダ部２のワッシャ２１をロータ軸１のフランジ部１２に対して常時確実に当接させることができ、安定した作動性を確保することができる。 As described above, the annular horizontal V-groove 13 as the "retracting portion" of the rotor shaft 1 allows the lower contact surface 21b on the washer 21 side to hit the upper portion of the flange portion 12 without interfering with the inside corner portion A. It can be reliably brought into contact with the contact surface 12a. Even if lateral displacement occurs between the rotor shaft 1 and the valve holder portion 2, the valve holder portion 2 (and the needle valve 3) does not tilt with respect to the rotor shaft 1, and the washer 21 of the valve holder portion 2 is used. It can always be reliably brought into contact with the flange portion 12 of the rotor shaft 1, and stable operability can be ensured.

図５乃至図７は第１実施形態における「後退部」の変形例１乃至３を示す図である。以下の各変形例及び第２実施形態において、第１実施形態と同様な要素には図１乃至図４と同符号を付記して重複する説明は適宜省略する。なお、図では片側の断面形状だけを示しているが、以下の垂直Ｖ溝１４、水平角溝１５、垂直角溝１６は前記軸線Ｘ回りの全周に形成された円環状の構造となっている。 5 to 7 are diagrams showing modified examples 1 to 3 of the "retracted portion" in the first embodiment. In each of the following modifications and the second embodiment, the same elements as those in the first embodiment are designated by the same reference numerals as those in FIGS. 1 to 4, and duplicate description will be omitted as appropriate. Although the cross-sectional shape of only one side is shown in the figure, the following vertical V-groove 14, horizontal square groove 15, and vertical square groove 16 have an annular structure formed all around the axis X. There is.

図５の変形例１は、ロータ軸１のボス部１１の外周面を軸方向に延長するようにして「後退部」としての円環状の垂直Ｖ溝１４を形成したものである。すなわち、この垂直Ｖ溝１４は、ロータ軸１の入隅部Ａ（図４参照）においてワッシャ２１側の出隅部Ｂ（図４参照）から軸方向に後退するように設けられている。 In the modified example 1 of FIG. 5, an annular vertical V-groove 14 is formed as a “retracting portion” by extending the outer peripheral surface of the boss portion 11 of the rotor shaft 1 in the axial direction. That is, the vertical V-groove 14 is provided so as to retract in the axial direction from the outside corner portion B (see FIG. 4) on the washer 21 side at the inside corner portion A (see FIG. 4) of the rotor shaft 1.

図６の変形例２は、ロータ軸１のフランジ部１２の上部当接面１２ａを中心側に延長するようにして「後退部」としての円環状の水平角溝１５を形成したものである。すなわち、この水平角溝１５は、ロータ軸１の入隅部Ａ（図４参照）においてワッシャ２１側の出隅部Ｂ（図４参照）から中心側に後退するように設けられている。 In the second modification of FIG. 6, the annular horizontal square groove 15 as the “retracted portion” is formed by extending the upper contact surface 12a of the flange portion 12 of the rotor shaft 1 toward the center side. That is, the horizontal angular groove 15 is provided so as to recede toward the center side from the outside corner portion B (see FIG. 4) on the washer 21 side at the inside corner portion A (see FIG. 4) of the rotor shaft 1.

図７の変形例３は、ロータ軸１のボス部１１の外周面を軸方向に延長するようにして「後退部」としての円環状の垂直角溝１６を形成したものである。すなわち、この垂直角溝１６は、ロータ軸１の入隅部Ａ（図４参照）においてワッシャ２１側の出隅部Ｂ（図４参照）から軸方向に後退するように設けられている。 In the modified example 3 of FIG. 7, an annular vertical square groove 16 is formed as a “retracting portion” by extending the outer peripheral surface of the boss portion 11 of the rotor shaft 1 in the axial direction. That is, the vertical angular groove 16 is provided so as to recede in the axial direction from the protruding corner B (see FIG. 4) on the washer 21 side at the inner corner A (see FIG. 4) of the rotor shaft 1.

以上の変形例１乃至３においても、垂直Ｖ溝１４、水平角溝１５、垂直角溝１６により、ワッシャ２１側の下部当接面２１ｂをフランジ部１２の上部当接１２ａに確実に当接させることができるので、ロータ軸１に対する弁ホルダ２（及びニードル弁３）の位置を精度高く保持することができ、安定した作動性を得ることができる。 Also in the above modified examples 1 to 3, the vertical V-groove 14, the horizontal square groove 15, and the vertical square groove 16 ensure that the lower contact surface 21b on the washer 21 side is brought into contact with the upper contact surface 12a of the flange portion 12. Therefore, the position of the valve holder 2 (and the needle valve 3) with respect to the rotor shaft 1 can be held with high accuracy, and stable operability can be obtained.

図８は第２実施形態の電動弁の要部拡大図、図９は図８の一点鎖線の円で示す部分の一部拡大図である。この第２実施形態では、ワッシャ２１の挿通孔２１ａの下方開口部の周囲に「後退部」としての円環状の段差部２１ｃを形成したものである。すなわち、段差部２１ｃは、挿通孔２１ａの内周面と下部当接面２１ｂとにそれぞれ直角となる面で構成されており、この段差部２１ｃは、ワッシャ２１の出隅部Ｂ（図４参照）においてロータ軸１側の入隅部Ａ（図４参照）から外側に後退するように設けられている。これにより、図９に示すように、ロータ軸１の入隅部ＡにＲ部１Ｑが形成されていても、ワッシャ２１側の下部当接面２１ｂをフランジ部１２の上部当接面１２ａに確実に当接させることができる。なお、段差部２１ｃの高さ［Ｈ１］とＲ部１Ｑの半径［Ｒ１］とは
Ｈ１＞Ｒ１
となっている。
したがって、ロータ軸１に対する弁ホルダ２（及びニードル弁３）の位置を精度高く保持することができ、安定した作動性を得ることができる。 FIG. 8 is an enlarged view of a main part of the motorized valve of the second embodiment, and FIG. 9 is a partially enlarged view of a part shown by a chain line of the alternate long and short dash line in FIG. In this second embodiment, an annular step portion 21c as a "retracting portion" is formed around the lower opening of the insertion hole 21a of the washer 21. That is, the step portion 21c is composed of a surface that is perpendicular to the inner peripheral surface of the insertion hole 21a and the lower contact surface 21b, respectively, and the step portion 21c is the protruding corner portion B of the washer 21 (see FIG. 4). ) Is provided so as to recede outward from the inside corner A (see FIG. 4) on the rotor shaft 1 side. As a result, as shown in FIG. 9, even if the R portion 1Q is formed at the inside corner portion A of the rotor shaft 1, the lower contact surface 21b on the washer 21 side is surely set on the upper contact surface 12a of the flange portion 12. Can be brought into contact with. The height [H1] of the step portion 21c and the radius [R1] of the R portion 1Q are H1> R1.
It has become.
Therefore, the position of the valve holder 2 (and the needle valve 3) with respect to the rotor shaft 1 can be held with high accuracy, and stable operability can be obtained.

図１０乃至図１２は第２実施形態における「後退部」の変形例４乃至６を示す図であり、各図の（Ａ）図は図８の一点鎖線の円に対応する部分の一部拡大図、（Ｂ）図はワッシャ２１の全体断面図である。 10 to 12 are diagrams showing modified examples 4 to 6 of the "retracted portion" in the second embodiment, and FIG. The figure and the figure (B) are the whole sectional view of the washer 21.

図１０の変形例４は、ワッシャ２１の挿通孔２１ａの下方開口部の周囲に「後退部」としての円環状の面取部２１ｄを形成したものである。すなわち、面取部２１ｄは、挿通孔２１ａの内周面と下部当接面２１ｂとにそれぞれ交差する面であり、この面取部２１ｄは、ワッシャ２１の出隅部Ｂ（図４参照）においてロータ軸１側の入隅部Ａ（図４参照）から外側に後退するように設けられている。なお、面取部２１ｄの高さ［Ｈ２］とＲ部１Ｑの半径［Ｒ１］とは
Ｈ２＞Ｒ１
となっている。 In the modified example 4 of FIG. 10, an annular chamfered portion 21d as a “retracting portion” is formed around the lower opening of the insertion hole 21a of the washer 21. That is, the chamfered portion 21d is a surface that intersects the inner peripheral surface of the insertion hole 21a and the lower contact surface 21b, respectively, and the chamfered portion 21d is at the protruding corner portion B (see FIG. 4) of the washer 21. It is provided so as to recede outward from the corner A (see FIG. 4) on the rotor shaft 1 side. The height [H2] of the chamfered portion 21d and the radius [R1] of the R portion 1Q are H2> R1.
It has become.

図１１の変形例５は、ワッシャ２１の挿通孔２１ａの下方開口部の周囲に「後退部」としての円環状のＲ面部２１ｅを形成したものであり、このＲ面部２１ｅは、ワッシャ２１の出隅部Ｂ（図４参照）においてロータ軸１側の入隅部Ａ（図４参照）から外側に後退するように設けられている。なお、Ｒ面部２１ｅの半径［Ｒ２］すなわち高さとＲ部１Ｑの半径［Ｒ１］とは
Ｒ２＞Ｒ１
となっている。 In the modified example 5 of FIG. 11, an annular R surface portion 21e as a “retracting portion” is formed around the lower opening of the insertion hole 21a of the washer 21, and the R surface portion 21e is the protrusion of the washer 21. It is provided so as to recede outward from the inside corner A (see FIG. 4) on the rotor shaft 1 side in the corner B (see FIG. 4). The radius [R2] of the R surface portion 21e, that is, the height and the radius [R1] of the R portion 1Q are R2> R1.
It has become.

以上の変形例４及び５においても、面取部２１ｄ及びＲ面部２１ｅにより、ワッシャ２１側の下部当接面２１ｂをフランジ部１２の上部当接１２ａに確実に当接させることができるので、ロータ軸１に対する弁ホルダ２（及びニードル弁３）の位置を精度高く保持することができ、安定した作動性を得ることができる。 Also in the above modified examples 4 and 5, the chamfered portion 21d and the R surface portion 21e can reliably bring the lower contact surface 21b on the washer 21 side into contact with the upper contact surface 12a of the flange portion 12, so that the rotor can be reliably brought into contact with the rotor. The position of the valve holder 2 (and the needle valve 3) with respect to the shaft 1 can be held with high accuracy, and stable operability can be obtained.

図１２の変形例６は、第２実施形態と同様な円環状の段差部２１ｃを、ワッシャ２１の挿通孔２１ａの上下両方の開口部の周囲に形成したものであり、下側の段差部２１ｃの作用効果は第２実施形態と同様である。この変形例６の場合、ワッシャ２１をロータ軸１に組み付ける際に、ワッシャ２１の裏表を考慮する必要がなく、組み付け作業が容易になる。なお、このように、ワッシャ２１の両面に「後退部」を設けるのは、変形例１乃至５にも同様に適用できる。 In the modified example 6 of FIG. 12, an annular step portion 21c similar to that of the second embodiment is formed around both the upper and lower openings of the insertion hole 21a of the washer 21, and the lower step is formed. The action and effect of the part 21c are the same as those in the second embodiment. In the case of this modification 6, when assembling the washer 21 to the rotor shaft 1, it is not necessary to consider the front and back of the washer 21, and the assembling work becomes easy. It should be noted that the provision of "retracted portions" on both sides of the washer 21 in this way can be similarly applied to the modified examples 1 to 5.

なお、上記の第１実施形態 及び、第２実施形態の各ワッシャ２１の形状は、各図面のワッシャ部分を上から見た上面図として表した図１３(Ａ)の様な円環状（リング状）のワッシャ２１や、図１３(Ｂ)の様な円環状の一部に切欠き２１ｄのあるＣ形状のワッシャ２１や、図１３(Ｃ)の様な円環状の一部に切欠き２１ｄのあるＵ形状のワッシャ２１でもよい。Ｃ形状やＵ形状のワッシャ２１とすることで作動軸に横から組み込むことができ、組立て性に優れるという効果がある。また、このＣ形状やＵ形状のワッシャ２１も、円環状（リング状）のワッシャ２１と同様に作動軸を嵌挿する目的の挿通孔２１ａを有するものである。 The shape of each washer 21 of the first embodiment and the second embodiment is an annular shape (ring shape) as shown in FIG. 13 (A), which is a top view of the washer portion of each drawing as viewed from above. ), A C-shaped washer 21 having a notch 21d in a part of the annular shape as shown in FIG. 13 (B), and a notch 21d in a part of the annular shape as shown in FIG. 13 (C). A certain U-shaped washer 21 may be used. By using a C-shaped or U-shaped washer 21, it can be incorporated into the operating shaft from the side, which has the effect of being excellent in assembling property. Further, the C-shaped or U-shaped washer 21 also has an insertion hole 21a for the purpose of fitting the operating shaft, similarly to the annular (ring-shaped) washer 21.

図１４は実施形態の冷凍サイクルシステムを示す図である。図において、符号１００は膨張弁を構成する本発明の各実施形態の電動弁、２００は室外ユニットに搭載された室外熱交換器、３００は室内ユニットに搭載された室内熱交換器、４００は四方弁を構成する流路切換弁、５００は圧縮機である。電動弁１００、室外熱交換器２００、室内熱交換器３００、流路切換弁４００、及び圧縮機５００は、それぞれ導管によって図示のように接続され、ヒートポンプ式の冷凍サイクルを構成している。なお、アキュムレータ、圧力センサ、温度センサ等は図示を省略してある。 FIG. 14 is a diagram showing a refrigeration cycle system of an embodiment. In the figure, reference numeral 100 is an electric valve of each embodiment of the present invention constituting an expansion valve, 200 is an outdoor heat exchanger mounted on an outdoor unit, 300 is an indoor heat exchanger mounted on an indoor unit, and 400 is a four-way valve. The flow path switching valve 500 constituting the valve is a compressor. The motorized valve 100, the outdoor heat exchanger 200, the indoor heat exchanger 300, the flow path switching valve 400, and the compressor 500 are each connected as shown by a conduit to form a heat pump type refrigeration cycle. The accumulator, pressure sensor, temperature sensor, etc. are not shown.

冷凍サイクルの流路は、流路切換弁４００により冷房運転時の流路と暖房運転時の流路の２通りに切換えられる。冷房運転時には、図に実線の矢印で示したように、圧縮機５００で圧縮された冷媒は流路切換弁４００から室外熱交換器２００に流入され、この室外熱交換器２００は凝縮器として機能し、室外熱交換器２００から流出された液冷媒は電動弁１００を介して室内熱交換器３００に流入され、この室内熱交換器３００は蒸発器として機能する。 The flow path of the refrigeration cycle is switched to two ways, a flow path during the cooling operation and a flow path during the heating operation, by the flow path switching valve 400. During the cooling operation, as shown by the solid arrow in the figure, the refrigerant compressed by the compressor 500 flows into the outdoor heat exchanger 200 from the flow path switching valve 400, and the outdoor heat exchanger 200 functions as a condenser. Then, the liquid refrigerant flowing out of the outdoor heat exchanger 200 flows into the indoor heat exchanger 300 via the electric valve 100, and the indoor heat exchanger 300 functions as an evaporator.

一方、暖房運転時には、図に破線の矢印で示したように、圧縮機５００で圧縮された冷媒は流路切換弁４００から室内熱交換器３００、電動弁１００、室外熱交換器２００、流路切換弁４００、そして、圧縮機５００の順に循環され、室内熱交換器３００が凝縮器として機能し、室外熱交換器２００が蒸発器として機能する。電動弁１００は、冷房運転時に室外熱交換器２００から流入する液冷媒、または暖房運転時に室内熱交換器３００から流入する液冷媒を、それぞれ減圧膨張し、さらにその冷媒の流量を制御する。 On the other hand, during the heating operation, as shown by the broken arrow in the figure, the refrigerant compressed by the compressor 500 is transferred from the flow path switching valve 400 to the indoor heat exchanger 300, the electric valve 100, the outdoor heat exchanger 200, and the flow path. The switching valve 400 and the compressor 500 are circulated in this order, the indoor heat exchanger 300 functions as a condenser, and the outdoor heat exchanger 200 functions as an evaporator. The electric valve 100 decompresses and expands the liquid refrigerant flowing from the outdoor heat exchanger 200 during the cooling operation and the liquid refrigerant flowing from the indoor heat exchanger 300 during the heating operation, respectively, and further controls the flow rate of the refrigerant.

なお、第１実施形態の後退部（図１～４）及び、後退部の変形例１（図５）は水平、垂直方向のＶ溝としているが、Ｒ状の溝でも良い。また、第１実施形態の後退部の変形例２、３（図６、７）は水平、垂直方向の角溝としているが、角溝の奥にある入隅部の角部にＲが付いた角溝でも良い。また、第２実施形態の後退部（図９）及び、後退部の変形例６（図１２）の段差部２１ｃは図では角が直角であるが、段差の入隅部と出隅部の角部にＲが付いた段差部でも良い。また、第２実施形態の後退部の変形例４（図１０）の面取部２１ｄは図では面取り始まり部と終わり部は角であるが、角をＲにしたＲの付いた面取部でも良い。 Although the retracted portion (FIGS. 1 to 4) and the modified example 1 (FIG. 5) of the retracted portion of the first embodiment are horizontal and vertical V-grooves, an R-shaped groove may be used. Further, although the modified examples 2 and 3 (FIGS. 6 and 7) of the retracted portion of the first embodiment have horizontal and vertical square grooves, R is attached to the corner of the inside corner at the back of the square groove. It may be a square groove. Further, although the angle of the stepped portion 21c of the retracted portion (FIG. 9) and the modified example 6 (FIG. 12) of the retracted portion of the second embodiment is a right angle in the figure, the corners of the inside corner and the outside corner of the step are angled. It may be a stepped portion with an R on the portion. Further, in the chamfered portion 21d of the modified example 4 (FIG. 10) of the retracted portion of the second embodiment, the chamfering start portion and the chamfering portion are corners in the figure, but the chamfered portion with R having the corners R is also available. good.

なお、前述で、『ロータ軸１は、雄ねじ部１ａより下端側の端部にボス部１１を有するとともに、このボス部１１にはフランジ部１２が一体に形成されている。』としているが、このフランジ部はロータ軸と一体の形成に限定されるものではなく、ロータ軸（作動軸）と別体に形成されていてもよい。従って、作動軸の端部の外周に別体の部品（フランジ部材）が固着されていることでフランジ部が形成されていてもよい。 As mentioned above, "The rotor shaft 1 has a boss portion 11 at the end on the lower end side of the male screw portion 1a, and the flange portion 12 is integrally formed with the boss portion 11. However, this flange portion is not limited to being integrally formed with the rotor shaft, and may be formed separately from the rotor shaft (acting shaft). Therefore, the flange portion may be formed by fixing a separate component (flange member) to the outer periphery of the end portion of the operating shaft.

以上、本発明の実施の形態について図面を参照して詳述してきたが、具体的な構成はこれらの実施の形態に限られるものではなく、本発明の要旨を逸脱しない範囲の設計の変更等があっても本発明に含まれる。 Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and the design changes, etc. within the range not deviating from the gist of the present invention, etc. Even if there is, it is included in the present invention.

１ ロータ軸（作動軸）
１Ｑ Ｒ部
１１ ボス部
１２ フランジ部
１２ａ 上部当接面
１３ 水平Ｖ溝（後退部）
１４ 垂直Ｖ溝（後退部）
１５ 水平角溝（後退部）
１６ 垂直角溝（後退部）
２ 弁ホルダ部
２１ ワッシャ
２１ａ 挿通孔
２１ｂ 下部当接面
２１ｃ 段差部（後退部）
２１ｄ 面取部（後退部）
２１ｅ Ｒ面部（後退部）
２２ ガイド管
２２ａ 挿通孔
２２ｂ 天井部
３ ニードル弁（弁部材）
１０ ステッピングモータ（モータ部）
１０ａ マグネットロータ
１０ｂ ステータコイル
２０ 弁ハウジング
２０Ｒ 弁室
３０ 密閉ケース
４０ 支持部材
４０ａ 雌ねじ部
４０ｂ ガイド孔
１ａ 雄ねじ部
５０ 第１継手管
６０ 第２継手管
７０ 弁座部材
７０ａ 弁ポート
Ａ 入隅部
Ｂ 出隅部
１００ 電動弁
２００ 室外熱交換器
３００ 室内熱交換器
４００ 流路切換弁
５００ 圧縮機 1 Rotor shaft (acting shaft)
1 QR part 11 Boss part 12 Flange part 12a Upper contact surface 13 Horizontal V groove (retracted part)
14 Vertical V-groove (retracted part)
15 Horizontal angle groove (recessed part)
16 Vertical angle groove (recessed part)
2 Valve holder 21 Washer 21a Insertion hole 21b Lower contact surface 21c Stepped portion (retracted portion)
21d Chamfered part (retracted part)
21e R surface part (retracted part)
22 Guide pipe 22a Insertion hole 22b Ceiling 3 Needle valve (valve member)
10 Stepping motor (motor section)
10a Magnet rotor 10b Stator coil 20 Valve housing 20R Valve chamber 30 Sealed case 40 Support member 40a Female threaded part 40b Guide hole 1a Male threaded part 50 First fitting pipe 60 Second fitting pipe 70 Valve seat member 70a Valve port A Inner corner B Out Corner 100 Electric valve 200 Outdoor heat exchanger 300 Indoor heat exchanger 400 Flow path switching valve 500 Compressor

Claims (7)

モータ部の作動軸に連動する弁部材により弁ポートを開閉する電動弁であって、前記作動軸の端部の外周にフランジ部が形成されるとともに、前記弁部材を保持して前記作動軸の前記フランジ部に連結される弁ホルダ部を備えた電動弁において、
前記弁ホルダ部は、前記作動軸を嵌挿する挿通孔を有するワッシャを、円筒状のガイド管の端部に形成された環状の天井部と前記フランジ部との間に配設して構成され、
前記ワッシャは、
前記弁ポート側の面に、前記フランジ部の前記モータ部側の面が当接し、
前記モータ部側の面に、前記天井部の前記弁ポート側の面が当接し、
前記作動軸における前記挿通孔に嵌挿される側面と前記フランジ部の前記ワッシャに対する当接面とが成す入隅部と、前記ワッシャにおける前記挿通孔の内周面と前記フランジ部に対する当接面部とが成す出隅部と、の少なくとも一方に、他方から後退した後退部が設けられている、ことを特徴とする電動弁。 It is an electric valve that opens and closes a valve port by a valve member interlocked with the operating shaft of the motor unit. A flange portion is formed on the outer periphery of the end portion of the operating shaft, and the valve member is held to hold the operating shaft. In an electric valve provided with a valve holder portion connected to the flange portion,
The valve holder portion is configured by disposing a washer having an insertion hole for inserting the operating shaft between the annular ceiling portion formed at the end of the cylindrical guide tube and the flange portion. ,
The washer is
The surface of the flange portion on the motor portion side comes into contact with the surface on the valve port side.
The surface of the ceiling portion on the valve port side comes into contact with the surface of the motor portion.
An inner corner portion formed by a side surface of the working shaft to be fitted into the insertion hole and a contact surface of the flange portion with respect to the washer, and an inner peripheral surface of the insertion hole in the washer and a contact surface portion with respect to the flange portion. An electric valve characterized in that at least one of the protruding corners formed by the is provided with a retracted portion retracted from the other. 前記後退部は、前記作動軸における前記入隅部に設けられた凹部によって構成されていることを特徴とする請求項１に記載の電動弁。 The motorized valve according to claim 1, wherein the retracting portion is composed of a recess provided in the inside corner portion of the operating shaft. 前記後退部は、前記ワッシャにおける前記出隅部に設けられた凹部によって構成されていることを特徴とする請求項１に記載の電動弁。 The motorized valve according to claim 1, wherein the retracting portion is composed of a recess provided in the protruding corner portion of the washer. 前記凹部が、段差部または面取部またはＲ面部であることを特徴とする請求項３に記載の電動弁。 The electric valve according to claim 3, wherein the recess is a stepped portion, a chamfered portion, or an R surface portion. 前記凹部の高さが、前記作動軸における前記入隅部のＲ部の半径より大きいことを特徴とする請求項４に記載の電動弁。 The motorized valve according to claim 4, wherein the height of the recess is larger than the radius of the R portion of the inside corner portion of the operating shaft. 前記凹部が、前記ワッシャにおける前記出隅部と、前記ワッシャの前記挿通孔の内周面における前記天井部側と、に形成されていることを特徴とする請求項５に記載の電動弁。 The electric valve according to claim 5, wherein the recess is formed in the protruding corner portion of the washer and the ceiling portion side of the inner peripheral surface of the insertion hole of the washer. 圧縮機と、凝縮器と、膨張弁と、蒸発器と、を含む冷凍サイクルシステムであって、請求項１乃至６のいずれか一項に記載の電動弁が、前記膨張弁として用いられていることを特徴とする冷凍サイクルシステム。 A refrigeration cycle system including a compressor, a condenser, an expansion valve, and an evaporator, wherein the electric valve according to any one of claims 1 to 6 is used as the expansion valve. A refrigeration cycle system characterized by that.
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