JP2023174727A - Motor valve and refrigeration cycle system - Google Patents

Motor valve and refrigeration cycle system Download PDF

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Publication number
JP2023174727A
JP2023174727A JP2023171284A JP2023171284A JP2023174727A JP 2023174727 A JP2023174727 A JP 2023174727A JP 2023171284 A JP2023171284 A JP 2023171284A JP 2023171284 A JP2023171284 A JP 2023171284A JP 2023174727 A JP2023174727 A JP 2023174727A
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Prior art keywords
valve
needle
sub
port
valve port
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大樹 中川
Daiki Nakagawa
亮司 小池
Ryoji Koike
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Saginomiya Seisakusho Inc
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Saginomiya Seisakusho Inc
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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
    • F16K1/02—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 with screw-spindle
    • 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
    • F16K1/44—Details of seats or valve members of double-seat valves
    • 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
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • 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
    • 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)
  • Lift Valve (AREA)

Abstract

To provide a motor valve having a two-stage flow rate control region for performing flow rate control of refrigerant in a small flow rate control region using a restriction part between a sub valve port and a needle valve formed in a main valve element while setting the main valve element in the state of being seated on a main valve seat, for improving the quietness in the small flow rate control region.SOLUTION: A motor valve includes a main valve element provided in a main valve chest 1R for opening/closing a main valve port 13a opening to the main valve chest 1R, and a sub valve element 4 to be moved in the direction of an axial line L of a sub valve port 3a formed in the main valve element 3 for controlling the opening of the sub valve port 3a, the sub valve element 4 including a needle valve 42 inserted through the sub valve port 3a in the direction of the axial line L. In the main valve element 3, a restriction flow path 3c having a uniform flow path cross section area is provided which is communicated from the main valve chest 1R to a restriction part C between the sub valve port 3a and the needle valve 42 in the direction of intersecting with the axial line L.SELECTED DRAWING: Figure 2

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 used in a refrigeration cycle system and the like, and a refrigeration cycle system.

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、小流量制御域と大流量制御域とで流量制御する電動弁がある。このような電動弁は、室内機に搭載される用途（例えば除湿弁）があり、例えば特開２０１９－１３２３４７号公報（特許文献１）に開示されている。 BACKGROUND ART Conventionally, as an electric valve provided in a refrigeration cycle of an air conditioner, there is an electric valve that controls the flow rate in a small flow rate control area and a large flow rate control area. Such a motor-operated valve has applications (for example, as a dehumidification valve) that are mounted on an indoor unit, and is disclosed in, for example, Japanese Patent Application Publication No. 2019-132347 (Patent Document 1).

特開２０１９－１３２３４７号公報JP 2019-132347 Publication

この種の電動弁は、小流量制御域は例えば除湿運転を行うものであり、この小流量制御域では、主弁座の主弁ポートを主弁体で全閉状態とし、この主弁体に形成された副弁ポートとニードル弁（副弁体）との間の絞り部を冷媒が通過するように構成されている。しかし、前記従来の電動弁では、小流量制御域のとき、流体は弁室（主弁室）から導通孔を介して副弁室に流入し、この副弁室を介して副弁ポートと副弁体との間の絞り部から流体が流出するよう構成されている。このため、主弁室から絞り部まで流れる流体は、導通孔から副弁室に流入する際に、一旦、膨張される。このため、副弁室での冷媒の圧力変動により副弁体が振動するなどして、騒音が生じるという問題がある。 This type of electric valve performs dehumidification operation in the small flow rate control area, for example, and in this small flow rate control area, the main valve port of the main valve seat is fully closed by the main valve element, and the main valve element is The refrigerant is configured to pass through a constriction between the formed sub-valve port and the needle valve (sub-valve body). However, in the conventional motor-operated valve, when the flow rate is in the small flow control range, fluid flows from the valve chamber (main valve chamber) to the auxiliary valve chamber through the communication hole, and through this auxiliary valve chamber, the fluid flows into the auxiliary valve port and the auxiliary valve chamber. The fluid is configured to flow out from the constriction section between the valve body and the valve body. Therefore, the fluid flowing from the main valve chamber to the throttle section is once expanded when flowing into the sub-valve chamber from the communication hole. Therefore, there is a problem in that the sub-valve body vibrates due to pressure fluctuations of the refrigerant in the sub-valve chamber, resulting in noise.

本発明は、主弁体を主弁座に着座状態とし、この主弁体に形成された副弁ポートとニードル弁との間の絞り部により冷媒の小流量制御域での流量制御を行う二段の流量制御域を有する電動弁において、小流量制御域での静音性を向上させることを課題とする。 In the present invention, the main valve body is seated on the main valve seat, and the flow rate of the refrigerant is controlled in a small flow rate control range using a constriction portion formed in the main valve body between the sub-valve port and the needle valve. An object of the present invention is to improve quietness in a small flow rate control area in a motor-operated valve having a flow rate control area of stages.

本発明の電動弁は、主弁室を有する弁本体と、前記主弁室内に空間を区画する区画部と、外周に雄ねじ部が形成されるロータ軸と、前記弁本体に設置され前記雄ねじ部が螺合する雌ねじ部を備えるガイド部材と、前記ロータ軸に設けられ前記区画部に形成された副弁ポートに対して軸線方向に挿通し前記雄ねじ部と前記雌ねじ部により構成されるねじ送り機構により前記軸線方向に移動して、該副弁ポートの開度を制御するニードル弁と、を備え、前記副弁ポートと前記ニードル弁との間の絞り部で流体を絞る電動弁において、前記区画部には、前記主弁室から前記軸線と交差する方向で前記副弁ポートと前記ニードル弁との間の前記絞り部まで流路断面積が一様な絞り流路と、前記副弁ポートと同軸で該副弁ポートに対向するニードルガイド孔が形成され、前記ニードル弁は、前記軸線方向にストレート部を有し、前記ストレート部が前記ニードルガイド孔にて前記軸線上にガイドされるよう構成され、前記副弁ポートと前記ニードルガイド孔とを前記軸線方向に接続する縦孔を備え、前記縦孔は、前記副弁ポートと同軸かつ同径であり、前記絞り流路は、前記縦孔に直接接続され、前記ストレート部の外径は、前記雄ねじ部の外径よりも小さいことを特徴とする。 The motor-operated valve of the present invention includes a valve main body having a main valve chamber, a partition section that partitions a space within the main valve chamber, a rotor shaft having a male threaded section formed on the outer periphery, and a rotor shaft installed in the valve main body and the male threaded section. a guide member having a female threaded portion that is screwed together; a screw feeding mechanism that is inserted in the axial direction into a sub-valve port provided on the rotor shaft and formed in the partitioned portion, and includes the male threaded portion and the female threaded portion; a needle valve that moves in the axial direction to control the opening degree of the auxiliary valve port, the motor-operated valve that throttles the fluid in a throttle section between the auxiliary valve port and the needle valve; The portion includes a throttle flow path having a uniform cross-sectional area from the main valve chamber to the throttle portion between the sub-valve port and the needle valve in a direction intersecting the axis; A needle guide hole coaxially facing the sub-valve port is formed, and the needle valve has a straight portion in the axial direction, and the straight portion is configured to be guided along the axis by the needle guide hole. and a vertical hole connecting the secondary valve port and the needle guide hole in the axial direction, the vertical hole is coaxial and has the same diameter as the secondary valve port, and the throttle flow path is connected to the vertical hole. The outer diameter of the straight portion is smaller than the outer diameter of the male threaded portion.

また、この際、前記ガイド部材は、前記弁本体の内周面に圧入される圧入部と、前記圧入部と前記軸線方向に並び前記圧入部より小径の円柱状のガイド部と、前記ガイド部に延設された前記ガイド部の外径以下のホルダ部と、を有し、前記雌ねじ部は、前記ホルダ部の中心に形成されていることが好ましい。 Further, in this case, the guide member includes a press-fitting part that is press-fitted into the inner circumferential surface of the valve body, a cylindrical guide part that is arranged in the axial direction with the press-fitting part and has a smaller diameter than the press-fitting part, and the guide part. and a holder part having an outer diameter equal to or less than the outer diameter of the guide part, and the female thread part is preferably formed at the center of the holder part.

また、前記副弁ポートの前記縦孔がある側と反対側の開口に連通し、前記副弁ポートの内径よりも大きい内径を有する円柱状の膨張孔が形成されていることが好ましい。 Further, it is preferable that a cylindrical expansion hole is formed, which communicates with the opening of the auxiliary valve port on the side opposite to the side where the vertical hole is located, and has an inner diameter larger than the inner diameter of the auxiliary valve port.

また、前記ニードル弁は、前記ストレート部と、前記ストレート部の前記軸線方向一端部に基端部が連続し先端部にかけて縮径されるニードルと、を備え、前記副弁ポートの内周面との間で鋭角をなす前記ニードルの外周面における前記基端部から前記先端部までの長さの２倍の値は、前記ストレート部の外径よりも大きいことが好ましい。 Further, the needle valve includes the straight part and a needle whose base end is continuous with the one end in the axial direction of the straight part and whose diameter is reduced toward the distal end, and the needle has an inner circumferential surface of the sub-valve port. It is preferable that a value twice the length from the base end to the distal end of the outer circumferential surface of the needle forming an acute angle between the needles is larger than the outer diameter of the straight part.

また、前記ニードル弁は、前記ストレート部と、前記ストレート部の前記軸線方向一端部に基端部が連続し先端部にかけて縮径されるニードルと、を備え、
前記ニードルにおける前記基端部から前記先端部までの前記軸線方向の長さは、前記ストレート部の半径よりも大きいことが好ましい。 Further, the needle valve includes the straight part and a needle whose base end is continuous with the one end in the axial direction of the straight part and whose diameter is reduced toward the distal end,
It is preferable that the length of the needle in the axial direction from the base end to the tip end is larger than the radius of the straight part.

また、前記ニードルガイド孔は前記絞り流路と前記軸線に沿って交差することが好ましい。 Further, it is preferable that the needle guide hole intersects the throttle channel along the axis.

また、前記絞り流路は、前記軸線周りに複数形成され、前記複数の絞り流路の流路断面積の総和は、前記副弁ポートの流路断面積より大きく設定されていることが好ましい。 Preferably, a plurality of the throttle channels are formed around the axis, and the sum of the cross-sectional areas of the plurality of throttle channels is set to be larger than the cross-sectional area of the sub-valve port.

また、本発明の冷凍サイクルシステムは、圧縮機と、室内熱交換器と、室外熱交換器と、電子膨張弁と、を含む冷凍サイクルシステムであって、上記いずれかに記載の電動弁が、前記電子膨張弁として用いられていることを特徴とする。 Further, the refrigeration cycle system of the present invention is a refrigeration cycle system including a compressor, an indoor heat exchanger, an outdoor heat exchanger, and an electronic expansion valve, and the electric valve according to any one of the above It is characterized in that it is used as the electronic expansion valve.

本発明の電動弁及び冷凍サイクルシステムによれば、副弁体と副弁ポートとの間の絞り部（隙間）による小流量制御の状態において、主弁室から絞り部に至る流体は、流路断面積が一様な絞り流路を通過するだけであり、冷媒の圧力変動が抑えられ冷媒の状態が安定し、ニードル弁ガイド孔によりニードル弁が副弁ポートの直近までガイドされることにより、副弁体の振動等を抑制でき、さらに、主弁体の絞り流路の弁室側の開口部および／または膨張孔の開口部に消音部材を設けることで、静音性が向上する。 According to the electric valve and refrigeration cycle system of the present invention, in a state of small flow rate control by the throttle part (gap) between the sub-valve body and the sub-valve port, the fluid from the main valve chamber to the throttle part flows through the flow path. Since the refrigerant only passes through a throttle channel with a uniform cross-sectional area, pressure fluctuations in the refrigerant are suppressed and the state of the refrigerant is stabilized, and the needle valve is guided to the vicinity of the sub-valve port by the needle valve guide hole. Vibrations of the sub-valve body can be suppressed, and quietness is improved by providing a muffling member at the opening on the valve chamber side of the throttle channel of the main valve body and/or at the opening of the expansion hole.

本発明の実施形態の電動弁の小流量制御域状態の縦断面図である。FIG. 3 is a longitudinal cross-sectional view of the electric valve according to the embodiment of the present invention in a small flow rate control region state. 実施形態の電動弁の図１の小流量制御域状態から副弁体が僅かに上昇した状態の要部拡大縦断面図である。FIG. 2 is an enlarged vertical cross-sectional view of the main part of the motor-operated valve of the embodiment in a state where the sub-valve body is slightly elevated from the small flow rate control region state shown in FIG. 1; 実施形態の電動弁における主弁体の変形例を示す拡大図である。It is an enlarged view showing a modification of the main valve body in the electric valve of the 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。1 is a diagram showing a refrigeration cycle system according to an embodiment of the present 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は実施形態の電動弁の小流量制御域状態の縦断面図、図２は実施形態の電動弁の図１の小流量制御域状態から副弁体が僅かに上昇した状態の要部拡大縦断面図である。なお、以下の説明における「上下」の概念は図１及び図２の図面における上下に対応する。この電動弁１００は、弁ハウジング１と、ガイド部材２と、主弁体３と、副弁体４と、駆動部５と、を備えている。 Next, embodiments of the electric valve and refrigeration cycle system of the present invention will be described with reference to the drawings. Fig. 1 is a longitudinal sectional view of the motor-operated valve according to the embodiment in the small flow control region state, and Fig. 2 is an enlarged view of the main part of the motor-operated valve according to the embodiment in the small flow control region state shown in Fig. 1 with the sub-valve body slightly elevated. FIG. Note that the concept of "up and down" in the following description corresponds to the up and down in the drawings of FIGS. 1 and 2. This electric valve 100 includes a valve housing 1 , a guide member 2 , a main valve body 3 , a sub-valve body 4 , and a drive section 5 .

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、その内側に主弁室１Ｒを有している。弁ハウジング１の外周片側には主弁室１Ｒに導通される第１継手管１１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１２が接続されている。また、弁ハウジング１の第２継手管１２の主弁室１Ｒ側には主弁座１３が形成され、この主弁座１３の内側は主弁ポート１３ａとなっている。主弁ポート１３ａは軸線Ｌを中心とする円柱形状の透孔（貫通した孔）であり、第２継手管１２は主弁ポート１３ａを介して主弁室１Ｒに導通される。なお、第１継手管１１及び第２継手管１２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 made of, for example, brass or stainless steel and has a substantially cylindrical shape, and has a main valve chamber 1R inside thereof. A first joint pipe 11 that communicates with the main valve chamber 1R is connected to one side of the outer periphery of the valve housing 1, and a second joint pipe 12 is connected to a cylindrical portion extending downward from the lower end. Further, a main valve seat 13 is formed on the main valve chamber 1R side of the second joint pipe 12 of the valve housing 1, and the inside of this main valve seat 13 is a main valve port 13a. The main valve port 13a is a cylindrical through hole centered on the axis L, and the second joint pipe 12 is communicated with the main valve chamber 1R via the main valve port 13a. Note that the first joint pipe 11 and the second joint pipe 12 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、ガイド部材２が取り付けられている。ガイド部材２は、弁ハウジング１の内周面内に圧入される圧入部２１と、圧入部２１より小径で圧入部２１の上下に位置する略円柱状のガイド部２２，２３と、上側のガイド部２２の上部に延設されたホルダ部２４と、圧入部２１の外周に設けられたリング状のフランジ部２５とを有している。圧入部２１、ガイド部２２，２３、ホルダ部２４は樹脂製の一体品として構成されている。また、フランジ部２５は、例えば、黄銅、ステンレス等の金属板であり、このフランジ部２５は、インサート成形により樹脂製の圧入部２１と共に一体に設けられている。 A guide member 2 is attached to an opening at the upper end of the valve housing 1 . The guide member 2 includes a press-fit part 21 that is press-fitted into the inner peripheral surface of the valve housing 1, approximately cylindrical guide parts 22 and 23 that have a smaller diameter than the press-fit part 21 and are located above and below the press-fit part 21, and an upper guide. It has a holder part 24 extending above the part 22 and a ring-shaped flange part 25 provided on the outer periphery of the press-fitting part 21 . The press-fitting part 21, the guide parts 22, 23, and the holder part 24 are constructed as an integral part made of resin. Further, the flange portion 25 is, for example, a metal plate made of brass, stainless steel, or the like, and is integrally provided with the resin press-fit portion 21 by insert molding.

ガイド部材２は、圧入部２１により弁ハウジング１に組み付けられ、フランジ部２５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。また、ガイド部材２において、圧入部２１及び上下のガイド部２２，２３の内側には軸線Ｌと同軸の円筒形状のガイド孔２Ａが形成されるとともに、ホルダ部２４の中心には、ガイド孔２Ａと同軸の雌ねじ部２４ａとそのねじ孔が形成されている。そして、下側のガイド部２３の内側でガイド孔２Ａ内には主弁体３が配設されている。 The guide member 2 is assembled to the valve housing 1 through a press-fitting portion 21 and is fixed to the upper end portion of the valve housing 1 via a flange portion 25 by welding. Further, in the guide member 2, a cylindrical guide hole 2A coaxial with the axis L is formed inside the press-fitting part 21 and the upper and lower guide parts 22, 23, and a guide hole 2A is formed in the center of the holder part 24. A female threaded portion 24a coaxial with the threaded portion 24a and its threaded hole are formed. The main valve body 3 is disposed inside the guide hole 2A inside the lower guide portion 23.

主弁体３は、主弁座１３に対して着座及び離座する主弁部３１と、副弁体４を保持する保持部３２とで構成されている。主弁部３１の内側には円柱状の膨張孔３Ａが形成されるとともに、保持部３２の内側には円柱状の副弁ガイド孔３Ｂが形成されている。そして、主弁部３１と保持部３２との間には、軸線Ｌを中心として膨張孔３Ａ側に開口する円柱状の副弁ポート３ａが形成されるとともに、副弁ガイド孔３Ｂ側で軸線Ｌと同軸の円柱状のニードルガイド孔３ｂが形成されている。 The main valve body 3 includes a main valve part 31 that seats and leaves the main valve seat 13, and a holding part 32 that holds the sub valve body 4. A cylindrical expansion hole 3A is formed inside the main valve part 31, and a cylindrical sub-valve guide hole 3B is formed inside the holding part 32. Between the main valve part 31 and the holding part 32, a cylindrical sub-valve port 3a is formed that opens toward the expansion hole 3A side with the axis L as the center, and is located along the axis L on the sub-valve guide hole 3B side. A cylindrical needle guide hole 3b coaxial with the needle guide hole 3b is formed.

また、主弁体３の主弁部３１と保持部３２との連結部において、主弁室１Ｒから軸線Ｌと交差する方向で副弁ポート３ａと後述のニードル弁４２との間の絞り部Ｃ（図２）まで連通する絞り流路３ｃが形成されている。この絞り流路３ｃは、主弁室１Ｒ側から副弁ポート３ａ側にかけて、流路断面積が一様となるような円柱形状をしている。この実施形態では、絞り流路３ｃは、軸線Ｌ周りに回転対象な位置に放射状に複数本（例えば４本）形成されている。そして、４本の絞り流路３ｃの合計の流路断面積は、副弁ポート３ａの流路断面積より大きく設定されている。なお、「流路断面積」とは流体が流れる方向と直行する面での断面積である。なお、ここでは絞り流路３ｃを４本としたものを例示したが、絞り流路３ｃの流路断面積の総和が、副弁ポート３ａの流路面積より大きく設定してあれば、２本以上の複数本としても良い。 In addition, at the connecting portion between the main valve portion 31 and the holding portion 32 of the main valve body 3, a throttle portion C between the sub valve port 3a and a needle valve 42, which will be described later, is located in a direction intersecting the axis L from the main valve chamber 1R. A throttle channel 3c is formed that communicates with the flow path (FIG. 2). The throttle flow path 3c has a cylindrical shape such that the cross-sectional area of the flow path is uniform from the main valve chamber 1R side to the sub-valve port 3a side. In this embodiment, a plurality (for example, four) of the throttle channels 3c are formed radially at positions that are rotationally symmetrical about the axis L. The total cross-sectional area of the four throttle channels 3c is set to be larger than the cross-sectional area of the sub-valve port 3a. Note that the "flow path cross-sectional area" is a cross-sectional area in a plane perpendicular to the direction in which the fluid flows. In addition, here, an example is shown in which there are four throttle channels 3c, but if the total cross-sectional area of the throttle channels 3c is set larger than the flow channel area of the sub-valve port 3a, two throttle channels 3c can be used. It is also possible to have multiple copies of the above.

主弁体３は、保持部３２の上端部にリテーナ３４を有するとともに、リテーナ３４とガイド部材２のガイド孔２Ａの上端部との間に主弁ばね３５を有しており、この主弁ばね３５により主弁体３は主弁座１３の方向（閉方向）に付勢されている。 The main valve body 3 has a retainer 34 at the upper end of the holding part 32, and a main valve spring 35 between the retainer 34 and the upper end of the guide hole 2A of the guide member 2. 35 urges the main valve body 3 in the direction of the main valve seat 13 (closed direction).

副弁体４は、ロータ軸５１の下端部にこのロータ軸５１と一体に形成されており、この副弁体４はガイド用ボス部４１とニードル弁４２とで構成されている。また、図２に示すように、副弁体４のニードル弁４２は、副弁ポート３ａ対して軸線Ｌ方向に挿通されるものであり、このニードル弁４２は軸線Ｌを中心線とする円柱からなるストレート部４２ａと、先端側にかけて縮径されたニードル４２ｂとから構成されている。また、ストレート部４２ａの外径は、副弁ポート３ａの内径より僅かに小さくなっており、ストレート部４２ａと副弁ポート３ａとの間、またはニードル４２ｂと副弁ポート３ａとの間には絞り部Ｃ（一点鎖線の円で囲った部分）が形成される。そして、この絞り部Ｃを小流量の冷媒が流れることにより小流量制御が行われる。なお、ガイド用ボス部４１の上端には、潤滑性樹脂からなる円環状のワッシャ４３が配設され、ワッシャ４３とガイド用ボス部４１は、副弁ガイド孔３Ｂ内に摺動可能に挿通されている。 The sub-valve body 4 is formed integrally with the rotor shaft 51 at the lower end of the rotor shaft 51, and the sub-valve body 4 includes a guide boss portion 41 and a needle valve 42. Further, as shown in FIG. 2, the needle valve 42 of the sub-valve body 4 is inserted into the sub-valve port 3a in the direction of the axis L, and the needle valve 42 is formed from a cylinder whose center line is the axis L. The needle 42b is composed of a straight portion 42a and a needle 42b whose diameter is reduced toward the tip end. Further, the outer diameter of the straight portion 42a is slightly smaller than the inner diameter of the sub-valve port 3a, and there is a restriction between the straight portion 42a and the sub-valve port 3a or between the needle 42b and the sub-valve port 3a. A portion C (the portion surrounded by a dashed-dotted line) is formed. A small flow rate control is performed by causing a small flow rate of the refrigerant to flow through this constricted portion C. An annular washer 43 made of lubricating resin is disposed at the upper end of the guide boss 41, and the washer 43 and the guide boss 41 are slidably inserted into the sub-valve guide hole 3B. ing.

さらに、ニードル弁４２のストレート部４２ａは、副弁ポート３ａの直上付近で絞り流路３ｃと軸線Ｌに沿って交差するニードルガイド孔３ｂの内周に摺動ガイドされている。 Further, the straight portion 42a of the needle valve 42 is slidably guided by the inner periphery of the needle guide hole 3b that intersects with the throttle channel 3c along the axis L near directly above the sub-valve port 3a.

弁ハウジング１の上端にはケース１４が溶接等によって気密に固定され、このケース１４の内外に駆動部５が構成されている。駆動部５は、ステッピングモータ５Ａと、ステッピングモータ５Ａの回転により副弁体４を進退させるねじ送り機構５Ｂと、ステッピングモータ５Ａの回転を規制するストッパ機構５Ｃと、を備えている。 A case 14 is airtightly fixed to the upper end of the valve housing 1 by welding or the like, and a drive section 5 is configured inside and outside the case 14. The drive unit 5 includes a stepping motor 5A, a screw feeding mechanism 5B that advances and retreats the sub-valve body 4 by rotation of the stepping motor 5A, and a stopper mechanism 5C that restricts the rotation of the stepping motor 5A.

ステッピングモータ５Ａは、ロータ軸５１と、ケース１４の内部に回転可能に配設されたマグネットロータ５２と、ケース１４の外周においてマグネットロータ５２に対して対向配置されたステータコイル５３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５１はブッシュを介してマグネットロータ５２の中心に取り付けられ、このロータ軸５１のガイド部材２側の外周には雄ねじ部５１ａが形成されている。この雄ねじ部５１ａはガイド部材２の雌ねじ部２４ａに螺合されており、これにより、ガイド部材２はロータ軸５１を軸線Ｌ上に支持している。そして、ガイド部材２の雌ねじ部２４ａとロータ軸５１の雄ねじ部５１ａはねじ送り機構５Ｂを構成している。なお、ケース１４の内側天井部には回転ストッパ機構５Ｃを保持する円筒部１４ａが設けられ、この円筒部１４ａ内には、ロータ軸５１の上端をガイドするガイド部材５２が配設されている。 The stepping motor 5A includes a rotor shaft 51, a magnet rotor 52 rotatably disposed inside a case 14, a stator coil 53 disposed opposite to the magnet rotor 52 on the outer periphery of the case 14, and other components shown in the figure. It is made up of a yoke, exterior members, etc. The rotor shaft 51 is attached to the center of the magnet rotor 52 via a bush, and a male threaded portion 51a is formed on the outer periphery of the rotor shaft 51 on the guide member 2 side. The male threaded portion 51a is screwed into the female threaded portion 24a of the guide member 2, so that the guide member 2 supports the rotor shaft 51 on the axis L. The female threaded portion 24a of the guide member 2 and the male threaded portion 51a of the rotor shaft 51 constitute a screw feeding mechanism 5B. A cylindrical portion 14a that holds the rotation stopper mechanism 5C is provided on the inner ceiling of the case 14, and a guide member 52 that guides the upper end of the rotor shaft 51 is disposed within the cylindrical portion 14a.

以上の構成により、ステッピングモータ５Ａが駆動されるとマグネットロータ５２及びロータ軸５１が回転し、ロータ軸５１の雄ねじ部５１ａとガイド部材２の雌ねじ部２４ａとのねじ送り機構５Ｂにより、マグネットロータ５２と共にロータ軸５１が軸線Ｌ方向に移動する。そして、副弁体４が軸線Ｌ方向に進退移動してニードル弁４２が副弁ポート３ａに対して近接又は離間する。また、ニードル弁４２が上昇するとき、ワッシャ４３が主弁体３のリテーナ３４に係合し、主弁体３は副弁体４と共に移動して、主弁座１３から離座する。なお、マグネットロータ５２には突起部５２ａが形成されており、マグネットロータ５２の回転に伴って突起部５２ａが回転ストッパ機構５Ｃを作動させ、ロータ軸５１（及びマグネットロータ５２）の最下端位置及び最上端位置が規制される。 With the above configuration, when the stepping motor 5A is driven, the magnet rotor 52 and the rotor shaft 51 rotate, and the screw feeding mechanism 5B of the male threaded portion 51a of the rotor shaft 51 and the female threaded portion 24a of the guide member 2 causes the magnet rotor 52 to rotate. At the same time, the rotor shaft 51 moves in the direction of the axis L. Then, the sub-valve body 4 moves forward and backward in the direction of the axis L, and the needle valve 42 approaches or separates from the sub-valve port 3a. Further, when the needle valve 42 rises, the washer 43 engages with the retainer 34 of the main valve body 3, and the main valve body 3 moves together with the sub valve body 4 and leaves the main valve seat 13. Note that the magnet rotor 52 is formed with a protrusion 52a, and as the magnet rotor 52 rotates, the protrusion 52a operates the rotation stopper mechanism 5C, and the lowermost position of the rotor shaft 51 (and the magnet rotor 52) and The top position is restricted.

図１の小流量制御域状態では、主弁体３は主弁座１３に着座した状態で主弁ポート１３ａが弁閉となり、副弁体４のニードル弁４２により副弁ポート３ａの開度が制御され、小流量の制御が行われる。このとき、主弁室１Ｒ内の冷媒は絞り流路３ｃを通って絞り部Ｃに流れるが、この冷媒は絞り流路３ｃの一様な流路断面積により安定した圧力で絞り部Ｃに流れる。そして、この冷媒は絞り部Ｃから膨張孔３Ａに流出するときに膨張される。すなわち、主弁室１Ｒから絞り部Ｃを通過するまで冷媒の流れが安定するので、当該電動弁における振動等を防止することができる。 In the small flow rate control region state of FIG. 1, the main valve port 13a is closed with the main valve body 3 seated on the main valve seat 13, and the opening degree of the sub valve port 3a is controlled by the needle valve 42 of the sub valve body 4. controlled, and small flow control is performed. At this time, the refrigerant in the main valve chamber 1R flows through the throttle channel 3c to the throttle section C, but this refrigerant flows to the throttle section C at a stable pressure due to the uniform cross-sectional area of the throttle channel 3c. . Then, this refrigerant is expanded when flowing out from the constriction portion C to the expansion hole 3A. That is, since the flow of the refrigerant is stable from the main valve chamber 1R until it passes through the throttle part C, vibrations and the like in the electric valve can be prevented.

また、複数の絞り流路３ｃは軸線Ｌ周りに回転対称な位置に設けられていることから、絞り流路３ｃを通過する冷媒によりニードル弁４２に対して軸線Ｌと交差する方向に大きく偏った力が加わることが抑制され、さらに、ニードル弁４２のストレート部４２ａは、副弁ポート３ａの直上付近でニードルガイド孔３ｂにガイドされていることから、冷媒の流れによる副弁体４の振動がより抑制される。 In addition, since the plurality of throttle channels 3c are provided at rotationally symmetrical positions around the axis L, the refrigerant passing through the throttle channels 3c causes the needle valve 42 to be largely biased in the direction intersecting the axis L. Further, since the straight portion 42a of the needle valve 42 is guided by the needle guide hole 3b in the vicinity directly above the auxiliary valve port 3a, the vibration of the auxiliary valve body 4 due to the flow of refrigerant is suppressed. More restrained.

なお、ニードル弁４２のニードル４２ｂは副弁ポート３ａに対して進退するが、このニードル４２ｂの外周と副弁ポート３ａとの間の隙間である絞り部Ｃの流路断面積も複数設けた絞り流路３ｃの合計の流路断面積より、常時小さくなっている。これにより、絞り流路３ｃに影響されず、副弁体４による低流量制御が精度良く行われる。 Note that the needle 42b of the needle valve 42 moves forward and backward with respect to the sub-valve port 3a, and the flow passage cross-sectional area of the constriction portion C, which is the gap between the outer periphery of the needle 42b and the sub-valve port 3a, is also a plurality of apertures. It is always smaller than the total cross-sectional area of the flow paths 3c. Thereby, the low flow rate control by the sub-valve body 4 is performed with high accuracy without being affected by the throttle channel 3c.

図３は実施形態の電動弁の変形例を示す小流量制御域状態の要部拡大縦断面図であり、以下のこの変形例においてその特徴部分以外の電動弁の全体構成は図１及び図２と同様である。この変形例では、主弁体３′において、主弁部３１と保持部３２とを別部品で構成し、主弁部３１の膨張孔３Ａの開口部に消音部材３６を配設し、保持部３２と主弁部３１との連結部分において、絞り流路３ｃの主弁室１Ｒ側の開口部分に消音部材３７を配設したものである。これら消音部材３６，３７により冷媒の通過音が吸収され、さらに静音効果が高まる。なお、消音部材３６，３７はいずれか一方だけでもよい。 FIG. 3 is an enlarged vertical cross-sectional view of the main part in a small flow rate control region state showing a modification of the motor-operated valve of the embodiment. In this modification described below, the overall configuration of the motor-operated valve other than its characteristic parts is shown in FIGS. 1 and 2. It is similar to In this modification, in the main valve body 3', the main valve part 31 and the holding part 32 are configured as separate parts, and a sound deadening member 36 is disposed at the opening of the expansion hole 3A of the main valve part 31, and the holding part 32 and the main valve part 31, a muffling member 37 is disposed at the opening of the throttle channel 3c on the main valve chamber 1R side. These sound deadening members 36 and 37 absorb the sound of the refrigerant passing, further enhancing the quiet effect. Note that only one of the sound deadening members 36 and 37 may be used.

図４は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り、同図に基づいて実施形態の冷凍サイクルシステムについて説明する。冷凍サイクルシステムは、例えば、家庭用エアコン等の空気調和機に用いられる。前記実施形態の電動弁１００は、空気調和機の第１室内側熱交換器９１（除湿時冷却器として作動）と第２室内側熱交換器９２（除湿時加熱器として作動）との間に設けられており、圧縮機９５、四方弁９６、室外側熱交換器９４および電子膨張弁９３とともに、ヒ－トポンプ式冷凍サイクルを構成している。第１室内側熱交換器９１と第２室内側熱交換器９２及び電動弁１００は室内に設置され、圧縮機９５、四方弁９６、室外側熱交換器９４および電子膨張弁９３は室外に設置されていて冷暖房装置を構成している。 FIG. 4 is a diagram showing a refrigeration cycle system according to an embodiment of the present invention, and the refrigeration cycle system according to the embodiment will be explained based on the diagram. Refrigeration cycle systems are used, for example, in air conditioners such as household air conditioners. The motor-operated valve 100 of the embodiment is provided between the first indoor heat exchanger 91 (operates as a cooler during dehumidification) and the second indoor heat exchanger 92 (operates as a heater during dehumidification) of the air conditioner. The compressor 95, four-way valve 96, outdoor heat exchanger 94, and electronic expansion valve 93 constitute a heat pump refrigeration cycle. The first indoor heat exchanger 91, the second indoor heat exchanger 92, and the electric valve 100 are installed indoors, and the compressor 95, four-way valve 96, outdoor heat exchanger 94, and electronic expansion valve 93 are installed outdoors. They have heating and cooling equipment.

除湿弁としての実施形態の電動弁１００は、除湿時以外の冷房時または暖房時には主弁体が全開状態とされて、第１室内熱交換器９１と第２室内熱交換器９２は一つの室内熱交換器とされる。そして、この一体の室内熱交換器と室外熱交換器９４は、「蒸発器」及び「凝縮器」として択一的に機能する。すなわち、電子膨張弁としての電動弁９３は、蒸発器と凝縮器の間に設けられている。 In the electric valve 100 of the embodiment as a dehumidification valve, the main valve body is fully opened during cooling or heating other than during dehumidification, and the first indoor heat exchanger 91 and the second indoor heat exchanger 92 are connected to one indoor heat exchanger. It is considered a heat exchanger. The integrated indoor heat exchanger and outdoor heat exchanger 94 function alternatively as an "evaporator" and a "condenser." That is, the electric valve 93 as an electronic expansion valve is provided between the evaporator and the condenser.

なお、本発明は、前記実施形態に限定されるものではなく、本発明の目的が達成できる他の構成等を含み、以下に示すような変形等も本発明に含まれる。例えば、前記実施形態では、家庭用エアコン等の空気調和機に用いられる電動弁１００を例示したが、本発明の電動弁は、家庭用エアコンに限らず、業務用エアコンであってもよいし、空気調和機に限らず、各種の冷凍機等にも適用可能である。 Note that the present invention is not limited to the embodiments described above, and includes other configurations that can achieve the object of the present invention, and the present invention also includes the following modifications. For example, in the above embodiment, the electric valve 100 used in an air conditioner such as a domestic air conditioner is illustrated, but the electric valve of the present invention is not limited to a household air conditioner, but may be used in a commercial air conditioner. It is applicable not only to air conditioners but also to various types of refrigerators.

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、その他の実施形態についても詳述してきたが、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。 The embodiments of the present invention have been described above in detail with reference to the drawings, and other embodiments have also been described in detail, but the specific configuration is not limited to these embodiments. Even if there are changes in the design within the scope of the invention, they are included in the present invention.

１ 弁ハウジング
１Ｒ 主弁室
１１ 第１継手管
１２ 第２継手管
１３ 主弁座
１３ａ 主弁ポート
Ｌ 軸線
Ｃ 絞り部
２ ガイド部材
２Ａ ガイド孔
２４ ホルダ部
２４ａ 雌ねじ部
３ 主弁体
３１ 主弁部
３２ 保持部
３ａ 副弁ポート
３ｂ ニードルガイド孔
３ｃ 絞り流路
４ 副弁体
４１ ガイド用ボス部
４２ ニードル弁
４２ａ ストレート部
４２ｂ ニードル
５ 駆動部
５Ａ ステッピングモータ
５Ｂ ねじ送り機構
５Ｃ ストッパ機構
５１ ロータ軸
５１ａ 雄ねじ部
５２ マグネットロータ
５３ ステータコイル
９１ 第１室内側熱交換器
９２ 第２室内側熱交換器
９３ 電子膨張弁
９４ 室外側熱交換器
９５ 圧縮機
９６ 四方弁
１００ 電動弁 1 Valve housing 1R Main valve chamber 11 First joint pipe 12 Second joint pipe 13 Main valve seat 13a Main valve port L Axis C Throttle part 2 Guide member 2A Guide hole 24 Holder part 24a Female thread part 3 Main valve body 31 Main valve part 32 Holding section 3a Sub-valve port 3b Needle guide hole 3c Throttle flow path 4 Sub-valve body 41 Guide boss section 42 Needle valve 42a Straight section 42b Needle 5 Drive section 5A Stepping motor 5B Screw feed mechanism 5C Stopper mechanism 51 Rotor shaft 51a Male thread Part 52 Magnet rotor 53 Stator coil 91 First indoor heat exchanger 92 Second indoor heat exchanger 93 Electronic expansion valve 94 Outdoor heat exchanger 95 Compressor 96 Four-way valve 100 Electrically operated valve

Claims (8)

主弁室を有する弁本体と、前記主弁室内に空間を区画する区画部と、外周に雄ねじ部が形成されるロータ軸と、前記弁本体に設置され前記雄ねじ部が螺合する雌ねじ部を備えるガイド部材と、前記ロータ軸に設けられ前記区画部に形成された副弁ポートに対して軸線方向に挿通し前記雄ねじ部と前記雌ねじ部により構成されるねじ送り機構により前記軸線方向に移動して、該副弁ポートの開度を制御するニードル弁と、を備え、前記副弁ポートと前記ニードル弁との間の絞り部で流体を絞る電動弁において、
前記区画部には、前記主弁室から前記軸線と交差する方向で前記副弁ポートと前記ニードル弁との間の前記絞り部まで流路断面積が一様な絞り流路と、前記副弁ポートと同軸で該副弁ポートに対向するニードルガイド孔が形成され、
前記ニードル弁は、前記軸線方向にストレート部を有し、
前記ストレート部が前記ニードルガイド孔にて前記軸線上にガイドされるよう構成され、
前記副弁ポートと前記ニードルガイド孔とを前記軸線方向に接続する縦孔を備え、
前記縦孔は、前記副弁ポートと同軸かつ同径であり、
前記絞り流路は、前記縦孔に直接接続され、
前記ストレート部の外径は、前記雄ねじ部の外径よりも小さいことを特徴とする電動弁。 A valve body having a main valve chamber, a partition section that partitions a space within the main valve chamber, a rotor shaft having a male threaded section formed on the outer periphery, and a female threaded section installed in the valve body and into which the male threaded section is screwed. a guide member provided on the rotor shaft, and a screw feeding mechanism configured by inserting the guide member in the axial direction into a sub-valve port provided on the rotor shaft and formed in the partitioning portion and moving in the axial direction. and a needle valve that controls the opening degree of the sub-valve port, and an electrically operated valve that throttles fluid in a constriction portion between the sub-valve port and the needle valve,
The partition section includes a throttle flow path having a uniform cross-sectional area from the main valve chamber to the throttle section between the sub-valve port and the needle valve in a direction intersecting the axis; A needle guide hole is formed coaxially with the port and facing the sub-valve port,
The needle valve has a straight portion in the axial direction,
The straight part is configured to be guided along the axis in the needle guide hole,
a vertical hole connecting the auxiliary valve port and the needle guide hole in the axial direction;
The vertical hole is coaxial and has the same diameter as the sub-valve port,
The throttle channel is directly connected to the vertical hole,
The electric valve, wherein an outer diameter of the straight portion is smaller than an outer diameter of the male threaded portion. 前記ガイド部材は、前記弁本体の内周面に圧入される圧入部と、
前記圧入部と前記軸線方向に並び前記圧入部より小径の円柱状のガイド部と、
前記ガイド部に延設された前記ガイド部の外径以下のホルダ部と、を有し、
前記雌ねじ部は、前記ホルダ部の中心に形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 guide member includes a press-fit portion that is press-fit into the inner circumferential surface of the valve body;
a cylindrical guide portion that is arranged in the axial direction of the press-fit portion and has a smaller diameter than the press-fit portion;
a holder portion extending to the guide portion and having a diameter equal to or less than the outer diameter of the guide portion;
The electric valve according to claim 1, wherein the female screw portion is formed at the center of the holder portion. 前記副弁ポートの前記縦孔がある側と反対側の開口に連通し、前記副弁ポートの内径よりも大きい内径を有する円柱状の膨張孔が形成されていることを特徴とする請求項１または２に記載の電動弁。 Claim 1, wherein a cylindrical expansion hole is formed which communicates with the opening of the auxiliary valve port on the side opposite to the side where the vertical hole is located and has an inner diameter larger than the inner diameter of the auxiliary valve port. or the electric valve described in 2. 前記ニードル弁は、前記ストレート部と、前記ストレート部の前記軸線方向一端部に基端部が連続し先端部にかけて縮径されるニードルと、を備え、
前記副弁ポートの内周面との間で鋭角をなす前記ニードルの外周面における前記基端部から前記先端部までの長さの２倍の値は、前記ストレート部の外径よりも大きいことを特徴とする請求項１～３のいずれか一項に記載の電動弁。 The needle valve includes the straight part and a needle whose base end is continuous with the one end in the axial direction of the straight part and whose diameter is reduced toward the distal end,
A value twice the length from the proximal end to the distal end of the outer circumferential surface of the needle that forms an acute angle with the inner circumferential surface of the auxiliary valve port is greater than the outer diameter of the straight portion. The electric valve according to any one of claims 1 to 3, characterized in that: 前記ニードル弁は、前記ストレート部と、前記ストレート部の前記軸線方向一端部に基端部が連続し先端部にかけて縮径されるニードルと、を備え、
前記ニードルにおける前記基端部から前記先端部までの前記軸線方向の長さは、前記ストレート部の半径よりも大きいことを特徴とする請求項１～４のいずれか一項に記載の電動弁。 The needle valve includes the straight part and a needle whose base end is continuous with the one end in the axial direction of the straight part and whose diameter is reduced toward the distal end,
The electric valve according to any one of claims 1 to 4, wherein the length of the needle in the axial direction from the base end to the tip end is larger than the radius of the straight part. 前記ニードルガイド孔は前記絞り流路と前記軸線に沿って交差することを特徴とする請求項１～５のいずれか一項に記載の電動弁。 The electric valve according to any one of claims 1 to 5, wherein the needle guide hole intersects the throttle channel along the axis. 前記絞り流路は、前記軸線周りに複数形成され、
前記複数の絞り流路の流路断面積の総和は、前記副弁ポートの流路断面積より大きく設定されていることを特徴とする請求項６に記載の電動弁。 A plurality of the throttle channels are formed around the axis,
7. The electric valve according to claim 6, wherein the sum of the cross-sectional areas of the plurality of throttle passages is set to be larger than the cross-sectional area of the sub-valve port. 圧縮機と、室内熱交換器と、室外熱交換器と、電子膨張弁と、を含む冷凍サイクルシステムであって、請求項１～７のいずれか一項に記載の電動弁が、前記電子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 comprising a compressor, an indoor heat exchanger, an outdoor heat exchanger, and an electronic expansion valve, wherein the electric valve according to any one of claims 1 to 7 A refrigeration cycle system characterized by being used as a valve.
JP2023171284A 2020-02-19 2023-10-02 Motor valve and refrigeration cycle system Pending JP2023174727A (en)

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