JP2021038802A - Electric valve and refrigeration cycle system - Google Patents

Electric valve and refrigeration cycle system Download PDF

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JP2021038802A
JP2021038802A JP2019160518A JP2019160518A JP2021038802A JP 2021038802 A JP2021038802 A JP 2021038802A JP 2019160518 A JP2019160518 A JP 2019160518A JP 2019160518 A JP2019160518 A JP 2019160518A JP 2021038802 A JP2021038802 A JP 2021038802A
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Prior art keywords
valve
joint pipe
valve seat
pipe
electric
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JP7123020B2 (en
Inventor
亮司 小池
Ryoji Koike
亮司 小池
大樹 中川
Daiki Nakagawa
大樹 中川
一也 小林
Kazuya Kobayashi
一也 小林
祐孝 宮寺
Yutaka Miyadera
祐孝 宮寺
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Saginomiya Seisakusho Inc
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Saginomiya Seisakusho Inc
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Priority to JP2019160518A priority Critical patent/JP7123020B2/en
Priority to CN202010851317.1A priority patent/CN112443667B/en
Priority to CN202211231537.XA priority patent/CN115492942A/en
Publication of JP2021038802A publication Critical patent/JP2021038802A/en
Priority to JP2022126384A priority patent/JP7317191B2/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
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F16K1/38—Valve members of conical shape
    • 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
    • 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
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/42—Valve seats
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • 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
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
    • 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
    • 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)
  • Details Of Valves (AREA)
  • Lift Valve (AREA)

Abstract

To provide an electric valve reducing noise such as refrigerant passing sound when a refrigerant flows into a valve chamber from a second joint pipe through a gap between a valve member and a valve port.SOLUTION: Between a valve chamber 1R of a valve housing 1 and a second joint pipe 12, a valve seat member 2 having a valve port 2a is provided. The valve seat member 2 is integrally composed of a valve seat portion 21, and a long cylindrical straightening pipe portion 22 projecting out from the valve seat portion 21 into the second joint pipe 12. In a fitting hole 1a1 of a cylindrical portion 1a of the valve housing 1, the valve seat portion 21 of the valve seat member 2 and a diameter-contracting portion 12a of the second joint pipe 12 are fitted. A refrigerant flowing from the second joint pipe 12 to a valve chamber 1R side is straightened by the valve port 2a in the straightening pipe portion 22 of the valve seat member 2.SELECTED DRAWING: Figure 1

Description

本発明は、冷凍サイクルシステム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 in a refrigeration cycle system or the like.

従来、空気調和機の冷凍サイクルに設けられる電動弁として、例えば特開２００５−９８４７１号公報（特許文献１）に開示されたものがある。この特許文献１の電動弁は、弁ハウジングの側面側から弁室に連通する一次継手管（第１継手管）と、弁ハウジングの下部の端部から弁座部材の弁ポートを介して弁室に連通する二次継手管（第２継手管）とを有している。そして、冷凍サイクルシステムの例えば暖房運転時には一次継手管から弁室に冷媒が流入し、弁室からニードル弁と弁ポートとの間隙を介して二次継手管に冷媒が流出される。一方、冷房運転時には、二次継手管からニードル弁と弁ポートとの間隙を介して弁室に冷媒が流入し、弁室から一次継手管に冷媒が流出される。 Conventionally, as an electric valve provided in a refrigeration cycle of an air conditioner, for example, there is one disclosed in Japanese Patent Application Laid-Open No. 2005-98471 (Patent Document 1). The electric valve of Patent Document 1 has a primary joint pipe (first joint pipe) communicating from the side surface side of the valve housing to the valve chamber, and a valve chamber from the lower end of the valve housing via a valve port of a valve seat member. It has a secondary joint pipe (second joint pipe) that communicates with. Then, for example, during the heating operation of the refrigeration cycle system, the refrigerant flows from the primary joint pipe into the valve chamber, and the refrigerant flows out from the valve chamber to the secondary joint pipe through the gap between the needle valve and the valve port. On the other hand, during the cooling operation, the refrigerant flows from the secondary joint pipe into the valve chamber through the gap between the needle valve and the valve port, and the refrigerant flows out from the valve chamber to the primary joint pipe.

特開２００５−９８４７１号公報Japanese Unexamined Patent Publication No. 2005-98471

特許文献１の電動弁では、二次継手管からニードル弁と弁ポートとの間隙を介して弁室に冷媒が流入する、逆方向の冷媒通過音等に対しては考慮されておらず、騒音対策として改良の余地がある。例えば、二次継手管側から冷媒を流す逆方向の場合、その冷媒は内径の大きな二次継手管から弁座部材の内径の小さな弁ポートに流れ込んで、すぐに弁ポートとニードル弁との隙間から弁室に流出する。このため、二次継手管内から弁ポートとニードル弁との隙間までの間での流速が大きいため、騒音が発生し易くなる。 The electric valve of Patent Document 1 does not consider the noise of the refrigerant flowing in the valve chamber from the secondary joint pipe through the gap between the needle valve and the valve port, and does not consider the noise of the refrigerant passing in the opposite direction. There is room for improvement as a countermeasure. For example, in the case of the reverse direction in which the refrigerant flows from the secondary joint pipe side, the refrigerant flows from the secondary joint pipe having a large inner diameter to the valve port having a small inner diameter of the valve seat member, and immediately the gap between the valve port and the needle valve. Outflows into the valve chamber. Therefore, since the flow velocity between the inside of the secondary joint pipe and the gap between the valve port and the needle valve is large, noise is likely to be generated.

本発明は、冷媒を第２継手管から弁部材と弁ポートとの間隙を介して弁室に冷媒を流入させる際の冷媒通過音等の騒音を低減した電動弁を提供することを課題とする。 An object of the present invention is to provide an electric valve that reduces noise such as refrigerant passing noise when the refrigerant flows into the valve chamber from the second joint pipe through the gap between the valve member and the valve port. ..

本発明の電動弁は、弁室を構成する弁本体の側部に第１継手管が連通されるとともに該弁本体に対して前記第１継手管と交差する方向に第２継手管が連通され、弁部材により開口面積が増減される弁ポートを介して前記第２継手管と前記弁室とが連通可能であって、前記弁室と前記第２継手管との間に前記弁ポートを有する弁座部材を備えた電動弁において、前記弁本体は少なくとも前記弁座部の一部が嵌合される嵌合孔を有し、前記弁座部材は、前記第２継手管の端部に接続される弁座部と、前記弁座部から前記第２継手管内に突出する長尺円筒状の整流管部とを、一体に有して構成されていることを特徴とする。 In the electric valve of the present invention, the first joint pipe is communicated with the side portion of the valve body constituting the valve chamber, and the second joint pipe is communicated with the valve body in a direction intersecting with the first joint pipe. The second joint pipe and the valve chamber can be communicated with each other through a valve port whose opening area is increased or decreased by a valve member, and the valve port is provided between the valve chamber and the second joint pipe. In an electric valve provided with a valve seat member, the valve body has a fitting hole into which at least a part of the valve seat portion is fitted, and the valve seat member is connected to an end portion of the second joint pipe. It is characterized in that the valve seat portion to be formed and the long cylindrical rectifying tube portion protruding from the valve seat portion into the second joint pipe are integrally provided.

この際、前記弁座部材の前記弁座部の外径は、前記第２継手管の前記端部と略同径であり、前記弁座部と前記第２継手管の前記端部とが、前記弁本体の前記嵌合孔内に嵌合されていることを特徴とする電動弁が好ましい。 At this time, the outer diameter of the valve seat portion of the valve seat member is substantially the same as the end portion of the second joint pipe, and the valve seat portion and the end portion of the second joint pipe are An electric valve characterized in that it is fitted in the fitting hole of the valve body is preferable.

また、前記弁座部材の前記弁座部の前記整流管部側の当接面と、前記第２継手管の前記弁座部側の前記端部の当接面とが、相互に当接して、前記弁座部と前記第２継手管とが接続されていることを特徴とする電動弁が好ましい。 Further, the contact surface of the valve seat member on the rectifying tube side and the contact surface of the end of the second joint pipe on the valve seat side are in contact with each other. , The electric valve characterized in that the valve seat portion and the second joint pipe are connected is preferable.

また、前記第２継手管は、前記弁座部材の前記弁座部が接続される縮径部と、該縮径部より径の大きな拡径部とを有して構成されていることを特徴とする電動弁が好ましい。 Further, the second joint pipe is characterized by having a reduced diameter portion to which the valve seat portion of the valve seat member is connected and an enlarged diameter portion having a diameter larger than the reduced diameter portion. The electric valve is preferable.

本発明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、前記電動弁が、前記膨張弁として用いられていることを特徴とする。 The refrigeration cycle system of the present invention is a refrigeration cycle system including a compressor, a condenser, an expansion valve, and an evaporator, wherein the electric valve is used as the expansion valve. To do.

本発明の電動弁によれば、弁座部材の整流管部は第２継手管内に突出する長尺円筒状となっており、この整流管部は第２継手管の内径より径の小さな流路により弁ポートに連通している。したがって、第２継手管から、弁ポートと弁部材との隙間へ流れる冷媒の流れが整流されるので、この弁ポートと弁部材との隙間から弁室へ流入される冷媒の通過音が低減される。 According to the electric valve of the present invention, the rectifying pipe portion of the valve seat member has a long cylindrical shape protruding into the second joint pipe, and this rectifying pipe portion has a flow path having a diameter smaller than the inner diameter of the second joint pipe. Communicates with the valve port. Therefore, since the flow of the refrigerant flowing from the second joint pipe to the gap between the valve port and the valve member is rectified, the passing noise of the refrigerant flowing into the valve chamber from the gap between the valve port and the valve member is reduced. To.

また、本発明の冷凍サイクルシステムによれば、前記電動弁と同様に、弁ポートと弁部材との隙間から弁室へ流入される冷媒の通過音が低減される。 Further, according to the refrigeration cycle system of the present invention, similarly to the electric valve, the passing noise of the refrigerant flowing into the valve chamber through the gap between the valve port and the valve member is reduced.

本発明の実施形態の電動弁の要部縦断面図である。It is a main part vertical sectional view of the electric valve of the embodiment of this invention. 実施形態の電動弁の要部拡大縦断面図である。It is an enlarged vertical sectional view of the main part of the electric valve of an embodiment. 実施形態の電動弁の全体縦断面図である。It is the whole vertical sectional view of the electric valve of an embodiment. 本発明の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 embodiment of this invention.

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について図面を参照して説明する。図１は本発明の実施形態における電動弁の要部縦断面図、図２は同電動弁の要部拡大図、図３は実施形態の電動弁の全体縦断面図である。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。この電動弁１００は、「弁本体」としての弁ハウジング１と、弁座部材２と、支持部材３と、密閉ケース４と、弁ホルダ５と、「弁部材」としてのニードル弁６と、ステッピングモータ７と、を備えている。 Next, an embodiment of the electric valve and the refrigeration cycle system of the present invention will be described with reference to the drawings. FIG. 1 is a vertical sectional view of a main part of the electric valve according to the embodiment of the present invention, FIG. 2 is an enlarged view of a main part of the electric valve, and FIG. 3 is an overall vertical sectional view of the electric valve according to the embodiment. The concept of "upper and lower" in the following description corresponds to the upper and lower parts in the drawing of FIG. The electric valve 100 includes a valve housing 1 as a "valve body", a valve seat member 2, a support member 3, a sealing case 4, a valve holder 5, a needle valve 6 as a "valve member", and stepping. It includes a motor 7.

弁ハウジング１は、例えば黄銅、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１Ｒを構成している。弁ハウジング１の外周片側には弁室１Ｒに導通される第１継手管１１が接続されている。また、弁ハウジング１の下端には、弁室１Ｒから下方に延びる筒状部１ａが形成されており、この筒状部１ａの内側の円柱状の嵌合孔１ａ１内に、弁座部材２と第２継手管１２とが嵌合されている。弁座部材２は軸線Ｌを中心とする弁ポート２ａを有し、第２継手管１２の弁室１Ｒ側の端部から挿通することで第２継手管１２に対して一体に組付けられている。第２継手管１２は弁ハウジング１の筒状部１ａ内に嵌合される縮径部１２ａと、この縮径部１２ａより径の大きな拡径部１２ｂとを有している。そして、第２継手管１２は弁座部材２の弁ポート２ａを介して弁室１Ｒに導通される。なお、第１継手管１１、第２継手管１２及び弁座部材２は、弁ハウジング１に対してろう付け等により固着されている。 The valve housing 1 is formed of, for example, brass, stainless steel, or the like in a substantially cylindrical shape, and the valve chamber 1R is formed inside the valve housing 1. A first joint pipe 11 conducting to the valve chamber 1R is connected to one side of the outer circumference of the valve housing 1. Further, a tubular portion 1a extending downward from the valve chamber 1R is formed at the lower end of the valve housing 1, and the valve seat member 2 is formed in the cylindrical fitting hole 1a1 inside the tubular portion 1a. The second joint pipe 12 is fitted. The valve seat member 2 has a valve port 2a centered on the axis L, and is integrally assembled to the second joint pipe 12 by being inserted from the end of the second joint pipe 12 on the valve chamber 1R side. There is. The second joint pipe 12 has a reduced diameter portion 12a fitted in the tubular portion 1a of the valve housing 1 and an enlarged diameter portion 12b having a diameter larger than the reduced diameter portion 12a. Then, the second joint pipe 12 is conducted to the valve chamber 1R via the valve port 2a of the valve seat member 2. The first joint pipe 11, the second joint pipe 12, and the valve seat member 2 are fixed to the valve housing 1 by brazing or the like.

弁ハウジング１の上端の開口部には、支持部材３が取り付けられている。支持部材３は、中央のホルダ部３１と、このホルダ部３１の外周の厚手の基部３２と、固定金具３３とを有しており、固定金具３３はインサート成形によりホルダ部３１及び基部３２と共に一体に設けられている。そして、支持部材３は固定金具３３を介して弁ハウジング１の上端部に溶接により固定されている。ホルダ部３１の中心には、軸線Ｌと同軸の雌ねじ部３１ａとそのねじ孔が形成されるとともに円筒形状のガイド孔３１ｂが形成されている。 A support member 3 is attached to the opening at the upper end of the valve housing 1. The support member 3 has a central holder portion 31, a thick base portion 32 on the outer circumference of the holder portion 31, and a fixing bracket 33, and the fixing bracket 33 is integrated with the holder portion 31 and the base portion 32 by insert molding. It is provided in. Then, the support member 3 is fixed to the upper end portion of the valve housing 1 by welding via the fixing metal fitting 33. At the center of the holder portion 31, a female screw portion 31a coaxial with the axis L and a screw hole thereof are formed, and a cylindrical guide hole 31b is formed.

密閉ケース４は、上端部が塞がれた略円筒形状に形成されており、弁ハウジング１の上端に溶接によって気密に固定されている。密閉ケース４内の上部には、ガイド４１が設けられるとともに、ガイド４１の外周には回転ストッパ機構４２が設けられている。 The airtight case 4 is formed in a substantially cylindrical shape with the upper end closed, and is airtightly fixed to the upper end of the valve housing 1 by welding. A guide 41 is provided on the upper part of the sealed case 4, and a rotation stopper mechanism 42 is provided on the outer periphery of the guide 41.

弁ホルダ５は円筒状の部材であり、支持部材３のガイド孔３１ｂ内に嵌合されて軸線Ｌ方向に摺動可能に配設されている。そして、弁ホルダ５の下端部にニードル弁６が固着されている。弁ホルダ５内には、バネ受け５１が軸線Ｌ方向に移動可能に設けられ、バネ受け５１とニードル弁６との間に圧縮コイルバネ５２が所定の荷重を与えられた状態で取り付けられている。 The valve holder 5 is a cylindrical member, which is fitted in the guide hole 31b of the support member 3 and slidably arranged in the L direction of the axis. The needle valve 6 is fixed to the lower end of the valve holder 5. A spring receiver 51 is provided in the valve holder 5 so as to be movable in the axis L direction, and a compression coil spring 52 is attached between the spring receiver 51 and the needle valve 6 in a state where a predetermined load is applied.

ステッピングモータ７は、ロータ軸７１と、密閉ケース４の内部に回転可能に配設されたマグネットロータ７２と、密閉ケース４の外周においてマグネットロータ７２に対して対向配置されたステータコイル７３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。なお、図３ではステータコイル７３の図示を省略してある。ロータ軸７１はマグネットロータ７２の中心に取り付けられ、このロータ軸７１は支持部材３側に延設されている。ロータ軸７１の支持部材３側の外周には雄ねじ部６１ａが形成されており、この雄ねじ部７１ａが支持部材３の雌ねじ部３１ａに螺合されている。そして、支持部材３のガイド孔３１ｂ内で、弁ホルダ５の上端部がロータ軸７１の下端部に係合され、弁ホルダ５及びニードル弁６はロータ軸７１によって回転可能に吊り下げた状態で支持されている。また、ロータ軸７１は上端部が密閉ケース４内のガイド４１内に回動自在に嵌め込まれている。 The stepping motor 7 includes a rotor shaft 71, a magnet rotor 72 rotatably arranged inside the sealed case 4, a stator coil 73 arranged to face the magnet rotor 72 on the outer circumference of the sealed case 4, and the like. , It is composed of a yoke, exterior members, etc. (not shown). In FIG. 3, the stator coil 73 is not shown. The rotor shaft 71 is attached to the center of the magnet rotor 72, and the rotor shaft 71 extends to the support member 3 side. A male screw portion 61a is formed on the outer circumference of the rotor shaft 71 on the support member 3 side, and the male screw portion 71a is screwed into the female screw portion 31a of the support member 3. Then, in the guide hole 31b of the support member 3, the upper end of the valve holder 5 is engaged with the lower end of the rotor shaft 71, and the valve holder 5 and the needle valve 6 are rotatably suspended by the rotor shaft 71. It is supported. Further, the upper end of the rotor shaft 71 is rotatably fitted in the guide 41 in the sealed case 4.

以上の構成により、ステッピングモータ７の駆動により、マグネットロータ７２及びロータ軸７１が回転し、ロータ軸７１の雄ねじ部７１ａと支持部材３の雌ねじ部３１ａとのねじ送り機構により、ロータ軸７１が軸線Ｌ方向に移動する。そして、ニードル弁６が軸線Ｌ方向に移動して弁座部材２に対して近接又は離間する。これにより、弁ポート２ａが開閉され、第１継手管１１から第２継手管１２へ、あるいは第２継手管１２から第１継手管１１へ流れる冷媒の流量が制御される。なお、マグネットロータ７２の上下の回転位置は回転ストッパ機構７２により規制される。 With the above configuration, the magnet rotor 72 and the rotor shaft 71 are rotated by driving the stepping motor 7, and the rotor shaft 71 is aligned with the screw feed mechanism between the male screw portion 71a of the rotor shaft 71 and the female screw portion 31a of the support member 3. Move in the L direction. Then, the needle valve 6 moves in the L direction of the axis and approaches or separates from the valve seat member 2. As a result, the valve port 2a is opened and closed, and the flow rate of the refrigerant flowing from the first joint pipe 11 to the second joint pipe 12 or from the second joint pipe 12 to the first joint pipe 11 is controlled. The vertical rotation position of the magnet rotor 72 is regulated by the rotation stopper mechanism 72.

図２に示すように、弁座部材２は、金属の切削加工等により形成され、第２継手管１２の縮径部１２ａの外径と略同径の弁座部２１と、弁座部２１から第２継手管１２内に突出する長尺円筒状の整流管部２２とを、一体に有して構成されている。弁座部２１の外径と縮径部１２ａの外径は略同径であり、それぞれが、弁ハウジング１の筒状部１ａの嵌合孔１ａ１に嵌合されている。 As shown in FIG. 2, the valve seat member 2 is formed by cutting metal or the like, and has a valve seat portion 21 having substantially the same diameter as the outer diameter of the reduced diameter portion 12a of the second joint pipe 12, and the valve seat portion 21. It is configured to integrally have a long cylindrical rectifying pipe portion 22 protruding into the second joint pipe 12. The outer diameter of the valve seat portion 21 and the outer diameter of the reduced diameter portion 12a are substantially the same, and each is fitted into the fitting hole 1a1 of the tubular portion 1a of the valve housing 1.

また、整流管部２２は第２継手管１２の縮径部１２ａの内径に整合する外径を有している。また、弁座部２１の整流管部２２側の段差面２１１と、第２継手管１２の縮径部１２ａの端面１２ａ１とは、それぞれが軸線Ｌと直交する「当接面」となっており、この段差面２１１と端面１２ａ１とを当接させて、弁座部２１と縮径部１２ａとが接続されている。そして、弁座部材２の弁ポート２ａは、弁座部２１の弁室１Ｒ側の端部から整流管部２２の第２継手管１２内の端部まで軸線Ｌを中心として貫通して形成され、この弁ポート２ａは長尺の円柱形状となっている。なお、整流管部２２の長さ「Ｂ」と外径「Ａ」との関係は、Ａ＜Ｂの関係にある。さらに、２Ａ＜Ｂの関係にあるのがより好ましい。 Further, the rectifying pipe portion 22 has an outer diameter that matches the inner diameter of the reduced diameter portion 12a of the second joint pipe 12. Further, the stepped surface 211 on the rectifying pipe portion 22 side of the valve seat portion 21 and the end surface 12a1 of the reduced diameter portion 12a of the second joint pipe 12 are "contact surfaces" orthogonal to the axis L, respectively. The stepped surface 211 and the end surface 12a1 are brought into contact with each other, and the valve seat portion 21 and the reduced diameter portion 12a are connected to each other. The valve port 2a of the valve seat member 2 is formed so as to penetrate from the end of the valve seat portion 21 on the valve chamber 1R side to the end of the rectifying pipe portion 22 in the second joint pipe 12 centering on the axis L. The valve port 2a has a long cylindrical shape. The relationship between the length "B" of the rectifying tube portion 22 and the outer diameter "A" is A <B. Further, it is more preferable that the relationship is 2A <B.

以上のように、弁座部材２は、第２継手管１２の縮径部１２ａの端部に接続される弁座部２１と、この弁座部２１から第２継手管１２内に突出する長尺円筒状の整流管部２２とを、一体に有して構成されている。すなわち、整流管部２２は第２継手管１２より細い構造であり、その中央の弁ポート２ａの内径も第２継手管１２の内径より小さくなっている。したがって、第２継手管１２からこの整流管部２２に流入する冷媒は細長い弁ポート２ａを通過する間に整流され、この整流された冷媒が弁ポート２ａとニードル弁６との隙間から弁室１Ｒに流出するときの、冷媒通過音が低減される。 As described above, the valve seat member 2 has a valve seat portion 21 connected to the end of the reduced diameter portion 12a of the second joint pipe 12 and a length protruding from the valve seat portion 21 into the second joint pipe 12. It is configured by integrally having a rectifying tube portion 22 having a cylindrical shape. That is, the rectifying pipe portion 22 has a structure thinner than that of the second joint pipe 12, and the inner diameter of the valve port 2a at the center thereof is also smaller than the inner diameter of the second joint pipe 12. Therefore, the refrigerant flowing from the second joint pipe 12 into the rectifying pipe portion 22 is rectified while passing through the elongated valve port 2a, and the rectified refrigerant is passed through the gap between the valve port 2a and the needle valve 6 to the valve chamber 1R. Refrigerant passing noise when flowing out to is reduced.

また、この実施形態では、弁座部材２の弁座部２１の外径は、第２継手管１２の縮径部１２ａ（端部）と略同径であり、弁座部２１と第２継手管１２の縮径部１２ａとが、弁ハウジング１（本体）の筒状部１ａの嵌合孔１ａ１内に嵌合されている。さらに、また、弁座部材２の弁座部２１と整流管部２２側の段差面２１１と、第２継手管１２の縮径部１２ａの端面１２ａ１とは、軸線Ｌと直交する当接面となっており、この当接面が相互に当接して弁座部２１と第２継手管１２とが接続されている。したがって、弁座部材２と第２継手管１２とが、軸線Ｌに対して正確に位置決めして保持できる。 Further, in this embodiment, the outer diameter of the valve seat portion 21 of the valve seat member 2 is substantially the same as the reduced diameter portion 12a (end portion) of the second joint pipe 12, and the valve seat portion 21 and the second joint The reduced diameter portion 12a of the pipe 12 is fitted into the fitting hole 1a1 of the tubular portion 1a of the valve housing 1 (main body). Further, the valve seat portion 21 of the valve seat member 2, the stepped surface 211 on the rectifying pipe portion 22 side, and the end surface 12a1 of the reduced diameter portion 12a of the second joint pipe 12 are contact surfaces orthogonal to the axis L. The contact surfaces are in contact with each other, and the valve seat portion 21 and the second joint pipe 12 are connected to each other. Therefore, the valve seat member 2 and the second joint pipe 12 can be accurately positioned and held with respect to the axis L.

また、実施形態では、第２継手管１２は、弁座部材２の弁座部２１が接続される縮径部１２ａとこの縮径部１２ａより径の大きな拡径部１２ｂとを有して構成されている。したがって、この拡径部１２ｂにより、弁座部材２の整流管部２２と第２継手管１２との間に空間が形成され、第２継手管１２内で整流管部２２を流入する冷媒の流速が低減され、整流管部２２での整流効果が高まり、さらに冷媒通過音が低減される。 Further, in the embodiment, the second joint pipe 12 includes a diameter-reduced portion 12a to which the valve seat portion 21 of the valve seat member 2 is connected and a diameter-expanded portion 12b having a diameter larger than the diameter-reduced portion 12a. Has been done. Therefore, the enlarged diameter portion 12b forms a space between the rectifying pipe portion 22 of the valve seat member 2 and the second joint pipe 12, and the flow velocity of the refrigerant flowing into the rectifying pipe portion 22 in the second joint pipe 12. Is reduced, the rectifying effect of the rectifying tube portion 22 is enhanced, and the noise of passing the refrigerant is further reduced.

また、図３に示すように、第２継手管１２の拡径部１２ｂは、弁座部材２の整流管部２２の先端より先の部分から第１継手管１１と平行となる方向（軸線Ｌと直角となる方向）に曲げられている。このように、第２継手管１２は、整流管部２２に対して横に曲げられていることにより、この整流管部２２に達する冷媒の流速が低減し、騒音が低減される。さらに、拡径部１２ｂの縮径部１２ａ側の端部から曲げ部までのストレート部１２ｂ１の長さ「Ｃ」は、拡径部１２ｂの外径「Ｄ」よりも短く、すなわちＣ＜Ｄとなっている。これにより、第２継手管１２から弁ポート２ａと弁部材６との隙間に冷媒が流れる方向の流し方向の際に、整流管部２２に達する直前での冷媒の流速が増大することを抑制でき、より騒音が低減される。また、整流管部２２の第２継手管１２内の端部から、ストレート部１２ｂ１における、第２継手管１２の曲げ部側の端部までの長さ「Ｅ」も、拡径部１２ｂの外径「Ｄ」よりも短くなっており、整流管部２２に達する直前で冷媒の流速が増大することをよりいっそう抑制することができる。 Further, as shown in FIG. 3, the enlarged diameter portion 12b of the second joint pipe 12 is in a direction parallel to the first joint pipe 11 from a portion beyond the tip of the rectifying pipe portion 22 of the valve seat member 2. It is bent in the direction perpendicular to. As described above, since the second joint pipe 12 is bent laterally with respect to the rectifying pipe portion 22, the flow velocity of the refrigerant reaching the rectifying pipe portion 22 is reduced, and the noise is reduced. Further, the length "C" of the straight portion 12b1 from the end portion of the enlarged diameter portion 12b on the reduced diameter portion 12a side to the bent portion is shorter than the outer diameter "D" of the enlarged diameter portion 12b, that is, C <D. It has become. As a result, it is possible to suppress an increase in the flow velocity of the refrigerant immediately before reaching the rectifying pipe portion 22 in the flow direction in which the refrigerant flows from the second joint pipe 12 to the gap between the valve port 2a and the valve member 6. , The noise is reduced more. Further, the length "E" from the end of the rectifying pipe portion 22 in the second joint pipe 12 to the end of the straight portion 12b1 on the bent portion side of the second joint pipe 12 is also outside the enlarged diameter portion 12b. It is shorter than the diameter "D", and it is possible to further suppress an increase in the flow velocity of the refrigerant immediately before reaching the rectifying tube portion 22.

図４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. 4 is a diagram showing a refrigeration cycle system of the embodiment. In the figure, reference numeral 100 is an electric valve of the 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 above is a compressor. The electric 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 between the flow path during the cooling operation and the 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 from 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, and further controls the flow rate of the refrigerant.

なお、図４の実施の形態においては、電動弁１００の第１継手管１１が室外熱交換器２００に接続され、第２継手管１２が室内熱交換器３００に接続される場合を説明したが、これに限らず、電動弁１００の第１継手管１１を室内熱交換器３００に接続し、第２継手管１２を室外熱交換器２００に接続してもよい。 In the embodiment of FIG. 4, the case where the first joint pipe 11 of the electric valve 100 is connected to the outdoor heat exchanger 200 and the second joint pipe 12 is connected to the indoor heat exchanger 300 has been described. The first joint pipe 11 of the electric valve 100 may be connected to the indoor heat exchanger 300, and the second joint pipe 12 may be connected to the outdoor heat exchanger 200.

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 弁ハウジング（弁本体）
１Ｒ 弁室
１ａ 筒状部
１ａ１ 嵌合孔
１１ 第１継手管
１２ 第２継手管
１２ａ 縮径部
１２ｂ 拡径部
２ 弁座部材
２ａ 弁ポート
２１ 弁座部
２２ 整流管部
３ 支持部材
４ 密閉ケース
５ 弁ホルダ
６ ニードル弁（弁部材）
７ ステッピングモータ
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 Valve housing (valve body)
1R Valve chamber 1a Cylindrical part 1a1 Fitting hole 11 1st joint pipe 12 2nd joint pipe 12a Diameter reduction part 12b Diameter expansion part 2 Valve seat member 2a Valve port 21 Valve seat part 22 Rectifier pipe part 3 Support member 4 Sealed case 5 Valve holder 6 Needle valve (valve member)
7 Stepping motor 100 Electric valve 200 Outdoor heat exchanger 300 Indoor heat exchanger 400 Flow path switching valve 500 Compressor

Claims (5)

弁室を構成する弁本体の側部に第１継手管が連通されるとともに該弁本体に対して前記第１継手管と交差する方向に第２継手管が連通され、弁部材により開口面積が増減される弁ポートを介して前記第２継手管と前記弁室とが連通可能であって、前記弁室と前記第２継手管との間に前記弁ポートを有する弁座部材を備えた電動弁において、
前記弁本体は少なくとも前記弁座部の一部が嵌合される嵌合孔を有し、
前記弁座部材は、前記第２継手管の端部に接続される弁座部と、前記弁座部から前記第２継手管内に突出する長尺円筒状の整流管部とを、一体に有して構成されていることを特徴とする電動弁。 The first joint pipe is communicated with the side portion of the valve body constituting the valve chamber, and the second joint pipe is communicated with the valve body in the direction intersecting with the first joint pipe, and the opening area is increased by the valve member. The second joint pipe and the valve chamber can be communicated with each other through the valve port to be increased or decreased, and an electric motor having a valve seat member having the valve port between the valve chamber and the second joint pipe. In the valve
The valve body has a fitting hole into which at least a part of the valve seat portion is fitted.
The valve seat member integrally includes a valve seat portion connected to the end portion of the second joint pipe and a long cylindrical rectifying pipe portion protruding from the valve seat portion into the second joint pipe. An electric valve characterized by being configured in the above. 前記弁座部材の前記弁座部の外径は、前記第２継手管の前記端部と略同径であり、前記弁座部と前記第２継手管の前記端部とが、前記弁本体の前記嵌合孔内に嵌合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 outer diameter of the valve seat portion of the valve seat member is substantially the same as the end portion of the second joint pipe, and the valve seat portion and the end portion of the second joint pipe are the valve main body. The electric valve according to claim 1, wherein the electric valve is fitted in the fitting hole of the above. 前記弁座部材の前記弁座部の前記整流管部側の当接面と、前記第２継手管の前記弁座部側の前記端部の当接面とが、相互に当接して、前記弁座部と前記第２継手管とが接続されていることを特徴とする請求項２に記載の電動弁。 The contact surface of the valve seat member on the rectifying tube side and the contact surface of the end of the second joint pipe on the valve seat side are in contact with each other. The electric valve according to claim 2, wherein the valve seat portion and the second joint pipe are connected to each other. 前記第２継手管は、前記弁座部材の前記弁座部が接続される縮径部と、該縮径部より径の大きな拡径部とを有して構成されていることを特徴とする請求項１乃至３のいずれか一項に記載の電動弁。 The second joint pipe is characterized by having a reduced diameter portion to which the valve seat portion of the valve seat member is connected and an enlarged diameter portion having a diameter larger than the reduced diameter portion. The electric valve according to any one of claims 1 to 3. 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４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 4 is used as the expansion valve. A refrigeration cycle system characterized by that.
JP2019160518A 2019-09-03 2019-09-03 Electric valve and refrigeration cycle system Active JP7123020B2 (en)

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