JP7349420B2 - Electric valve and refrigeration cycle system - Google Patents

Electric valve and refrigeration cycle system Download PDF

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JP7349420B2
JP7349420B2 JP2020197354A JP2020197354A JP7349420B2 JP 7349420 B2 JP7349420 B2 JP 7349420B2 JP 2020197354 A JP2020197354 A JP 2020197354A JP 2020197354 A JP2020197354 A JP 2020197354A JP 7349420 B2 JP7349420 B2 JP 7349420B2
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attached
valve
sliding contact
electric valve
axial direction
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JP2022085592A (en
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達也 鈴木
誠一 中野
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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
    • F16K1/04—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 with a cut-off member rigid with the spindle, e.g. main 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
    • 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
    • F16K1/36—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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
    • 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
    • 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)
  • Electrically Driven Valve-Operating Means (AREA)

Description

本発明は、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.

一般に、弁体を進退移動させることで弁ポートの開度を調整する電動弁において、ステッピングモータ等の回転駆動力を発生する手段が設けられるとともに、回転運動を直進運動に変換するねじ送り機構が設けられることがある。このような電動弁として、回転駆動部と固定駆動部とのうち一方に配置されて他方に接触する接触部が設けられたものが提案されている（例えば、特許文献１参照）。特許文献１に記載された電動弁では、接触部を設けることにより、ねじ送り機構における雄ねじと雌ねじとの間のクリアランスを確保しつつ、このクリアランスによって生じる振動を吸収させて作動音の抑制を図っている。 Generally, in an electric valve that adjusts the opening degree of a valve port by moving the valve body forward and backward, a means for generating rotational driving force such as a stepping motor is provided, and a screw feeding mechanism that converts rotational motion into linear motion is provided. It may be provided. As such an electric valve, one has been proposed that is provided with a contact portion that is disposed on one of a rotary drive section and a fixed drive section and contacts the other (see, for example, Patent Document 1). In the electric valve described in Patent Document 1, by providing a contact portion, a clearance is ensured between the male thread and the female thread in the screw feeding mechanism, and vibrations generated by this clearance are absorbed to suppress operating noise. ing.

特開２０１８－１１９６１３号公報JP 2018-119613 Publication

しかしながら、特許文献１に記載された電動弁では、接触部を設ける際の組立性が低くなりやすいという不都合があった。例えば、回転駆動部と固定駆動部とが径方向において対向する位置に接触部を設けようとすると、取付位置が外部から見て隠れた位置となりやすく、取付作業が困難となる場合があった。 However, the motor-operated valve described in Patent Document 1 has a disadvantage in that it tends to be difficult to assemble when providing a contact portion. For example, when attempting to provide a contact portion at a position where the rotary drive unit and the fixed drive unit face each other in the radial direction, the attachment position tends to be hidden from view from the outside, making the attachment work difficult.

本発明の目的は、作動音を低減しつつ組立性を向上させることができる電動弁及び該電動弁を備えた冷凍サイクルシステムを提供することである。 An object of the present invention is to provide a motor-operated valve that can improve assembly efficiency while reducing operating noise, and a refrigeration cycle system equipped with the motor-operated valve.

本発明の電動弁は、弁ハウジングと、前記弁ハウジングに設けられた弁室の弁ポートの開度を変更する弁体と、ロータ軸を回転させる回転駆動手段と、前記ロータ軸の回転運動を直進運動に変換することで前記弁体を軸方向に進退移動させるねじ送り機構と、を備えた電動弁であって、前記ねじ送り機構を構成する回転側部材を含む回転側ユニットと、前記ねじ送り機構を構成する固定側部材を含む固定側ユニットと、前記回転側ユニットと前記固定側ユニットとを、前記軸方向に直交する平面内において互いに遠ざけるように付勢力を付与する付勢部材と、を備え、前記付勢部材は、前記軸方向と交差するように延在するとともに前記回転側ユニットと前記固定側ユニットとのうち一方に取り付けられる被取付部と、前記回転側ユニットと前記固定側ユニットとのうち他方に摺接する摺接部と、前記被取付部と前記摺接部との間において前記軸方向に沿って延在する変形部と、を有することを特徴とする。 The motor-operated valve of the present invention includes a valve housing, a valve body that changes the opening degree of a valve port of a valve chamber provided in the valve housing, a rotational drive means that rotates a rotor shaft, and a rotational drive means that rotates the rotor shaft. A motor-operated valve comprising: a screw feeding mechanism that moves the valve body forward and backward in the axial direction by converting it into a linear movement; a rotating side unit including a rotating side member constituting the screw feeding mechanism; a fixed-side unit including a fixed-side member constituting a feeding mechanism, and a biasing member that applies a biasing force to move the rotation-side unit and the fixed-side unit away from each other in a plane perpendicular to the axial direction; The biasing member includes an attached portion that extends to intersect with the axial direction and is attached to one of the rotation side unit and the fixed side unit, and the rotation side unit and the fixed side unit. It is characterized by having a sliding contact portion that slides on the other of the units, and a deformed portion that extends along the axial direction between the attached portion and the sliding contact portion.

以上のような本発明によれば、付勢部材が設けられていることで、ねじ送り機構における作動音を低減することができる。また、被取付部が軸方向に交差するように延在していることで、例えば軸方向から取付対象に被取付部を重ねて取り付けることができる。従って、被取付部が軸方向に延在する構成と比較して、取付対象に対する取付作業が容易となり、組立性を向上させることができる。 According to the present invention as described above, since the biasing member is provided, the operating noise in the screw feeding mechanism can be reduced. Further, since the attached portions extend so as to intersect with each other in the axial direction, the attached portions can be attached to the attachment target in an overlapping manner from the axial direction, for example. Therefore, compared to a configuration in which the attached portion extends in the axial direction, the attachment work to the attachment target becomes easier, and the ease of assembly can be improved.

この際、本発明の電動弁では、前記被取付部は、前記ロータ軸が通過可能な通過部を有するとともに、前記回転側ユニットを構成する少なくとも２部品によって前記軸方向から挟み込まれることにより、前記回転側ユニットに取り付けられることが好ましい。このような構成によれば、接着や溶接等の作業が必要なく、組立性をさらに向上させることができる。 In this case, in the electric valve of the present invention, the attached part has a passage part through which the rotor shaft can pass, and is sandwiched from the axial direction by at least two parts constituting the rotation side unit. Preferably, it is attached to the rotating unit. According to such a configuration, work such as adhesion or welding is not necessary, and the ease of assembly can be further improved.

また、本発明の電動弁では、前記回転側ユニットは、筒状のマグネット収容部の内周面に沿うように設けられたマグネットを含み、前記被取付部は、前記マグネットのうち、前記軸方向における弁閉側の端面に固定されてもよい。マグネットのうち弁閉側の端面では、他の部材との干渉が生じにくく、組立性を向上させやすい。また、変形部が被取付部と摺接部との間において軸方向に沿って延在していることにより、被取付部と摺接部とを軸方向において適宜にずらして配置することができ、摺接部を固定側ユニットのうち所望の位置に摺接させやすくすることができる。 Further, in the electric valve of the present invention, the rotation side unit includes a magnet provided along the inner circumferential surface of the cylindrical magnet accommodating part, and the attached part is the magnet in the axial direction. It may be fixed to the end face on the valve closing side. The end face of the magnet on the valve-closing side is less likely to interfere with other members, making it easier to assemble. Furthermore, since the deformable part extends along the axial direction between the attached part and the sliding contact part, the attached part and the sliding contact part can be appropriately shifted in the axial direction. , it is possible to easily bring the sliding contact portion into sliding contact with a desired position of the fixed side unit.

また、本発明の電動弁では、前記被取付部は、前記固定側ユニットに取り付けられてもよい。このような構成によれば、ロータ軸が直進運動しても、付勢部材は直進運動せず、ねじ送り機構における噛み合い部分と付勢部材（特に摺接部）との相対位置が変化しない。即ち、噛み合い部分に作用する付勢力が変化しにくく、弁体の位置が変化しても作動音を抑制しやすい。 Further, in the electric valve of the present invention, the attached portion may be attached to the fixed unit. According to such a configuration, even if the rotor shaft moves in a straight line, the biasing member does not move in a straight line, and the relative position between the meshing portion of the screw feeding mechanism and the biasing member (particularly the sliding contact portion) does not change. That is, the biasing force acting on the meshing portion does not change easily, and even if the position of the valve body changes, it is easy to suppress operating noise.

また、本発明の電動弁では、前記付勢部材は、全体が板金により形成され、前記摺接部のうち前記変形部とは反対側の端部に連続するとともに摺接対象から離れるように延びる離隔部を有することが好ましい。このような構成によれば、付勢部材が離隔部を有することで、付勢部材を構成する板金の端縁が摺接対象に摺接することを抑制することができる。従って、摺接時に生じる摩擦力を低減し、摩耗や騒音を抑制することができる。 Further, in the electric valve of the present invention, the biasing member is entirely formed of a sheet metal, and is continuous with an end of the sliding contact portion on the opposite side to the deformed portion and extends away from the object of sliding contact. It is preferable to have a separation part. According to such a configuration, since the biasing member has the separation portion, it is possible to suppress the edge of the sheet metal forming the biasing member from slidingly contacting the sliding target. Therefore, the frictional force generated during sliding contact can be reduced, and wear and noise can be suppressed.

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、上記いずれかに記載の電動弁が、前記膨張弁として用いられていることを特徴とする。以上のような本発明によれば、上記のように、作動音を低減しつつ組立性を向上させることができる。 The refrigeration cycle system of the present invention is a refrigeration cycle system including a compressor, a condenser, an expansion valve, and an evaporator, and wherein any of the electric valves described above is used as the expansion valve. It is characterized by the presence of According to the present invention as described above, as described above, it is possible to improve assembly efficiency while reducing operating noise.

本発明の電動弁及び冷凍サイクルシステムによれば、作動音を低減しつつ組立性を向上させることができる。 According to the electric valve and refrigeration cycle system of the present invention, ease of assembly can be improved while reducing operating noise.

本発明の一例である実施形態に係る電動弁を示す断面図である。FIG. 1 is a sectional view showing an electrically operated valve according to an embodiment that is an example of the present invention. 前記電動弁の付勢部材を示す斜視図である。FIG. 3 is a perspective view showing a biasing member of the electric valve. 前記電動弁が設けられた冷凍サイクルシステムを示すシステム図である。It is a system diagram showing a refrigeration cycle system provided with the electric valve. 第１の変形例に係る電動弁を示す断面図である。It is a sectional view showing the electric valve concerning the 1st modification. 第２の変形例に係る電動弁を示す断面図である。It is a sectional view showing the electric valve concerning the 2nd modification. 第３の変形例に係る電動弁を示す断面図である。It is a sectional view showing the electric valve concerning the 3rd modification. 前記電動弁の要部を拡大して示す断面図である。FIG. 3 is an enlarged cross-sectional view showing a main part of the electric valve.

本発明の実施形態について、図面を参照して説明する。本実施形態の電動弁１は、パッケージエアコンやルームエアコン等の空気調和機の冷凍サイクルシステムに用いられるものであって、弁ハウジング２と、弁体３と、弁ホルダ４と、支持部材５と、ステッピングモータ６と、付勢部材７と、を備える。 Embodiments of the present invention will be described with reference to the drawings. The electric valve 1 of this embodiment is used in a refrigeration cycle system of an air conditioner such as a package air conditioner or a room air conditioner, and includes a valve housing 2, a valve body 3, a valve holder 4, and a support member 5. , a stepping motor 6, and a biasing member 7.

弁ハウジング２は、弁ハウジング本体２０Ａと、上蓋２０Ｂと、からなり、上蓋２０Ｂは、弁ハウジング本体２０Ａの後述する上側の端部にろう付けによって固定されている。弁ハウジング本体２０Ａは、円筒状に形成され、その内側の弁室２Ａ内に弁体３および弁ホルダ４を収容する。以下では、弁ハウジング本体２０Ａの軸方向をＺ方向とし、Ｚ方向に直交する２方向をそれぞれＸ方向及びＹ方向とする。また、以下ではＺ方向における上下は図１を基準とし、上側が弁開側となり、下側が弁閉側となる。弁ハウジング本体２０Ａには、弁室２Ａに連通する継手管２１が側面に取り付けられるとともに、下端部には筒状開口部２２が形成されている。筒状開口部２２には、Ｚ方向に延びる継手管２３の端部が挿通されて接続されるとともに、弁座部２４が一体に形成されている。継手管２３は、弁座部２４の弁ポート２５に連通している。 The valve housing 2 includes a valve housing main body 20A and an upper cover 20B, and the upper cover 20B is fixed to an upper end of the valve housing main body 20A, which will be described later, by brazing. The valve housing main body 20A is formed in a cylindrical shape, and accommodates the valve body 3 and the valve holder 4 in the valve chamber 2A inside thereof. Hereinafter, the axial direction of the valve housing main body 20A will be referred to as the Z direction, and the two directions orthogonal to the Z direction will be referred to as the X direction and the Y direction, respectively. In addition, below, the upper and lower sides in the Z direction are based on FIG. 1, and the upper side is the valve open side, and the lower side is the valve closed side. A joint pipe 21 communicating with the valve chamber 2A is attached to the side surface of the valve housing body 20A, and a cylindrical opening 22 is formed at the lower end. An end portion of a joint pipe 23 extending in the Z direction is inserted through and connected to the cylindrical opening 22, and a valve seat portion 24 is integrally formed therein. The joint pipe 23 communicates with a valve port 25 of the valve seat portion 24 .

弁体３は、弁ホルダ４と嵌合して吊り下げられており、弁ホルダ４から下方に向かって延び、先端にニードル弁３１を有している。ニードル弁３１が弁座部２４の後述するシール部２６に対して着座又は離座する。 The valve body 3 is fitted and suspended from the valve holder 4, extends downward from the valve holder 4, and has a needle valve 31 at its tip. The needle valve 31 seats on or leaves the seal portion 26 of the valve seat portion 24, which will be described later.

弁ホルダ４は、Ｚ方向に沿って延びる円筒状に形成され、その上端部が、ステッピングモータ６の後述するロータ軸６１の下端部に係合されている。即ち、弁ホルダ４は、ロータ軸６１によって吊り下げられており、ロータ軸６１に対して回転可能となっている。また、弁ホルダ４内には、圧縮コイルバネ４１が設けられ、弁体３に対して下方への荷重が与えられている。尚、圧縮コイルバネ４１は説明の都合上、図１において破線によって省略して図示している。 The valve holder 4 is formed in a cylindrical shape extending along the Z direction, and its upper end is engaged with the lower end of a rotor shaft 61 of the stepping motor 6, which will be described later. That is, the valve holder 4 is suspended by the rotor shaft 61 and is rotatable with respect to the rotor shaft 61. Further, a compression coil spring 41 is provided inside the valve holder 4, and applies a downward load to the valve body 3. For convenience of explanation, the compression coil spring 41 is omitted in FIG. 1 by broken lines.

支持部材５は、弁ハウジング２における上蓋２０Ｂの上方開口を塞ぐように、フランジ部５１において上蓋２０Ｂに固定されている。支持部材５には、弁ホルダ４を収容するとともにＺ方向に案内する案内凹部５２と、ロータ軸６１が螺合する雌ねじ部５３と、案内凹部５２とステッピングモータ６の後述するケース６２内の空間とを連通する連通孔（不図示）と、が形成されている。 The support member 5 is fixed to the upper lid 20B at the flange portion 51 so as to close the upper opening of the upper lid 20B in the valve housing 2. The support member 5 includes a guide recess 52 that accommodates the valve holder 4 and guides it in the Z direction, a female thread 53 into which the rotor shaft 61 is screwed, and a space between the guide recess 52 and the stepping motor 6 in a case 62 described later. A communication hole (not shown) communicating with the two is formed.

ステッピングモータ６は、ロータ軸６１と、ケース６２と、マグネットロータ６３と、ステータコイル６４と、によって構成されている。ケース６２内には、外周部を多極に着磁されたマグネットロータ６３が回転可能に設けられ（即ち、ケース６２には、マグネットとしてのマグネットロータ６３が収容され）、このマグネットロータ６３にはロータ軸６１が固着されている。さらに、ケース６２は、弁ハウジング２における上蓋２０Ｂの上方開口を塞ぐように、上蓋２０Ｂに固定されている。ステータコイル６４は、ケース６２の外周に配設されている。ステッピングモータ６は、ステータコイル６４にパルス信号が与えられることにより、そのパルス数に応じてマグネットロータ６３を回転させる。 The stepping motor 6 includes a rotor shaft 61, a case 62, a magnet rotor 63, and a stator coil 64. A magnet rotor 63 whose outer periphery is magnetized with multiple poles is rotatably provided in the case 62 (that is, a magnet rotor 63 as a magnet is housed in the case 62). A rotor shaft 61 is fixed. Further, the case 62 is fixed to the upper lid 20B so as to close the upper opening of the upper lid 20B in the valve housing 2. The stator coil 64 is arranged around the outer periphery of the case 62. The stepping motor 6 rotates the magnet rotor 63 according to the number of pulses given to the stator coil 64 by a pulse signal.

ロータ軸６１の外周面には、支持部材５の雌ねじ部５３と螺合する雄ねじ部６１１が形成されている。ステッピングモータ６が駆動することで、マグネットロータ６３及びロータ軸６１が回転し、雄ねじ部６１１と雌ねじ部５３とにより構成されるねじ送り機構により、ロータ軸６１がＺ方向に移動する。これにより、ロータ軸６１に吊り下げられた弁ホルダ４が、支持部材５の案内凹部５２に案内されつつＺ方向に移動し、弁体３のニードル弁３１がシール部２６に対して着座又は離座し、弁ポート２５が開閉される。そして、弁体３のＺ方向の位置（リフト量）に応じて弁ポート２５の開度が制御され、弁ポート２５を流れる流体の流量が制御される。 A male threaded portion 611 is formed on the outer circumferential surface of the rotor shaft 61 and is screwed into the female threaded portion 53 of the support member 5 . When the stepping motor 6 is driven, the magnet rotor 63 and the rotor shaft 61 are rotated, and the rotor shaft 61 is moved in the Z direction by a screw feeding mechanism constituted by the male threaded portion 611 and the female threaded portion 53. As a result, the valve holder 4 suspended from the rotor shaft 61 moves in the Z direction while being guided by the guide recess 52 of the support member 5, and the needle valve 31 of the valve body 3 is seated or separated from the seal portion 26. The valve port 25 is opened and closed. Then, the opening degree of the valve port 25 is controlled according to the position (lift amount) of the valve body 3 in the Z direction, and the flow rate of the fluid flowing through the valve port 25 is controlled.

尚、上記の構成では、支持部材５及びケース６２が、弁ハウジング２における上蓋２０Ｂの上方開口を塞ぐものとしたが、これらは弁ハウジングの上方開口を塞ぐものであればよい。例えば、弁ハウジングが上蓋を有しておらず、弁ハウジング本体のみによって構成される場合には、支持部材及びケース６２は、弁ハウジング本体に直接固定されることにより、弁ハウジングの上方開口を塞いでもよい。 In the above configuration, the support member 5 and the case 62 close the upper opening of the upper cover 20B in the valve housing 2, but they may be used as long as they close the upper opening of the valve housing. For example, if the valve housing does not have an upper cover and is composed only of the valve housing body, the support member and case 62 are directly fixed to the valve housing body, thereby blocking the upper opening of the valve housing. But that's fine.

以上のように、電動弁１は、回転駆動手段としてのステッピングモータ６と、ロータ軸６１の回転運動を直進運動に変換することで弁体３を軸方向に進退移動させるねじ送り機構と、を備える。ねじ送り機構を構成する回転側部材としてのロータ軸６１と、マグネットロータ６３と、が回転側ユニットを構成する。ねじ送り機構を構成する固定側部材（回転しない部材）としての支持部材５と、その他の回転しない部材と、が固定側ユニットを構成する。尚、電動弁１において、ロータ軸６１及びマグネットロータ６３以外の部材は回転しない（弁ホルダ４は多少の連れ回りをしてもよい）ことから、これらの回転しない部材も固定側ユニットに含まれる。尚、本実施形態では、回転側部材としてのロータ軸６１に雄ねじ部６１１が形成されるとともに固定側部材としての支持部材５に雌ねじ部５３が形成されるものとしたが、回転側部材に雌ねじ部が形成されるとともに固定側部材に雄ねじ部が形成される構成であってもよい。 As described above, the electric valve 1 includes the stepping motor 6 as a rotational drive means, and the screw feeding mechanism that moves the valve body 3 forward and backward in the axial direction by converting the rotational motion of the rotor shaft 61 into linear motion. Be prepared. The rotor shaft 61 as a rotation-side member constituting the screw feeding mechanism and the magnet rotor 63 constitute a rotation-side unit. The support member 5 as a fixed side member (non-rotating member) constituting the screw feeding mechanism and other non-rotating members constitute a fixed side unit. In addition, in the electric valve 1, since the members other than the rotor shaft 61 and the magnet rotor 63 do not rotate (the valve holder 4 may rotate to some extent), these non-rotating members are also included in the fixed side unit. . In this embodiment, the male threaded portion 611 is formed on the rotor shaft 61 as the rotating side member, and the female threaded portion 53 is formed on the support member 5 as the stationary side member. A configuration may also be adopted in which a male screw portion is formed on the fixed side member.

付勢部材７は、例えば全体が１枚の帯板状の板金によって一体に形成された板ばねであって、図２にも示すように、被取付部７１と、一対のアーム部７２と、一対の離隔部７３と、を有する。被取付部７１は、軸方向であるＺ方向と直交する（交差する）平面であるＸＹ平面に沿って延在するとともに、長方形状に形成され、後述するように回転側ユニットに取り付けられる。固定部７１の中央部（長方形の対角線同士が交差する位置）には、通過部としての貫通孔７１１が形成されている。 The biasing member 7 is, for example, a leaf spring that is integrally formed of a single band-like sheet metal, and as shown in FIG. 2, it includes an attached part 71, a pair of arm parts 72, It has a pair of separation parts 73. The attached portion 71 extends along the XY plane, which is a plane perpendicular to (intersects with) the Z direction, which is the axial direction, and is formed in a rectangular shape, and is attached to the rotation side unit as described later. A through hole 711 serving as a passage portion is formed in the center portion of the fixed portion 71 (the position where the diagonal lines of the rectangle intersect).

一対のアーム部７２は、径方向（Ｚ方向に直交する方向）に対向するように配置され、被取付部７１からＺ方向下側に向かって延びる長方形板状に形成されている。アーム部７２は回転側ユニットとともに回転するものの、常にＺ方向を含む平面に沿って延在するとともに径方向と略直交する。アーム部７２は、下端部において後述するように固定側ユニットに摺接し、この摺接する部分が摺接部７２１となる。アーム部７２のうち摺接部７２１よりも上側の部分が変形部７２２となる。即ち、変形部７２２は、被取付部７１と摺接部７２１との間においてＺ方向に沿って延在する。 The pair of arm portions 72 are arranged to face each other in the radial direction (direction perpendicular to the Z direction), and are formed in a rectangular plate shape extending downward from the attached portion 71 in the Z direction. Although the arm portion 72 rotates together with the rotating unit, it always extends along a plane that includes the Z direction and is substantially perpendicular to the radial direction. The arm portion 72 comes into sliding contact with the fixed side unit at its lower end as will be described later, and this sliding contact portion becomes a sliding contact portion 721 . A portion of the arm portion 72 above the sliding contact portion 721 becomes a deformable portion 722 . That is, the deformable portion 722 extends along the Z direction between the attached portion 71 and the sliding contact portion 721.

離隔部７３は、摺接部７２１のうち変形部７２２とは反対側の端部である下端部に連続し、径方向外側に向かって延びることで、摺接対象である支持部材５から離れるように延びている。離隔部７３は、例えばＸＹ平面に沿って延びる。 The separation part 73 is continuous with the lower end of the sliding contact part 721, which is the end opposite to the deformation part 722, and extends radially outward so as to separate from the support member 5 that is the object of sliding contact. It extends to The separation portion 73 extends, for example, along the XY plane.

ここで、付勢部材７と他の部材との詳細な関係について説明する。被取付部７１は、マグネットロータ６３のうちロータ軸６１と固定される中央部６３１の下面に重なるように配置される。さらに、被取付部７１の貫通孔７１１には、ロータ軸６１のうち小径部６１２が挿通され、即ちロータ軸６１が通過部を通過する。ロータ軸６１は、中央部６３１と所定の間隔を開けた位置に、貫通孔７１１を通過不能な大径部６１３を有する。これにより、被取付部７１のうち貫通孔７１１の周囲の部分が、中央部６３１の下面と大径部６１３とによってＺ方向から挟み込まれる。このようにして、付勢部材７が被取付部７１において回転側ユニットに取り付けられる。尚、付勢部材７は、回転側ユニットに固定されることにより、ロータ軸６１及びマグネットロータ６３が回転した際に同時に回転するようになっていてもよいし、回転側ユニットに対して単に取り付けられることにより、ロータ軸６１及びマグネットロータ６３の回転が付勢部材７に伝達されない（あるいは伝達されにくい）ようになっていてもよい。 Here, the detailed relationship between the biasing member 7 and other members will be explained. The attached portion 71 is arranged so as to overlap the lower surface of a central portion 631 of the magnet rotor 63 that is fixed to the rotor shaft 61 . Furthermore, the small diameter portion 612 of the rotor shaft 61 is inserted into the through hole 711 of the attached portion 71, that is, the rotor shaft 61 passes through the passage portion. The rotor shaft 61 has a large diameter portion 613 that cannot pass through the through hole 711 at a position spaced apart from the center portion 631 by a predetermined distance. As a result, a portion of the attached portion 71 around the through hole 711 is sandwiched between the lower surface of the central portion 631 and the large diameter portion 613 from the Z direction. In this way, the biasing member 7 is attached to the rotating unit at the attached portion 71. The biasing member 7 may be fixed to the rotating unit so that it rotates simultaneously when the rotor shaft 61 and the magnet rotor 63 rotate, or it may be simply attached to the rotating unit. By doing so, the rotation of the rotor shaft 61 and the magnet rotor 63 may not be transmitted to the biasing member 7 (or may be difficult to be transmitted).

支持部材５には、雌ねじ部５３が形成された小径部５５と、小径部５５よりも基端側（下側）に位置する大径部５６と、が形成されている。一対のアーム部７２は、支持部材５を径方向から挟み込むとともに、その先端部（下端部）である摺接部７２１が、大径部５６の外周面に摺接する。尚、アーム部７２のうち大径部５６の外側に位置する部分の全体が大径部５６に摺接してもよいし、一部のみが摺接してもよい。 The support member 5 is formed with a small diameter part 55 in which a female threaded part 53 is formed, and a large diameter part 56 located on the proximal side (lower side) of the small diameter part 55. The pair of arm portions 72 sandwich the support member 5 in the radial direction, and the sliding contact portion 721 that is the tip portion (lower end portion) of the arm portion 72 slides on the outer circumferential surface of the large diameter portion 56 . Note that the entire portion of the arm portion 72 located outside the large diameter portion 56 may be in sliding contact with the large diameter portion 56, or only a portion thereof may be in sliding contact.

自然状態の付勢部材７において、一対の摺接部７２１同士の間隔は、大径部５６の外径よりも小さくなっている。従って、大径部５６を一対の摺接部７２１同士の間に配置した際、アーム部７２１が径方向外側に押し広げられて撓み変形し、付勢部材７は、大径部５６に対して径方向内側への付勢力を付与する。即ち、回転側ユニットに取り付けられた付勢部材７は、回転側ユニットと固定側ユニットとをＸＹ平面内において（好ましくは径方向において）互いに遠ざけるように付勢力を付与する。このような付勢力が付与されることで、ねじ送り機構において雄ねじ部６１１と雌ねじ部５３との間にクリアランスを形成しても、これらが互いに接触した状態を維持しつつ相対回転することができ、がたつきを生じにくくして作動音を低減することができる。 In the biasing member 7 in its natural state, the distance between the pair of sliding contact portions 721 is smaller than the outer diameter of the large diameter portion 56 . Therefore, when the large diameter portion 56 is placed between the pair of sliding contact portions 721, the arm portion 721 is pushed outward in the radial direction and is deformed, and the biasing member 7 is moved against the large diameter portion 56. Provides a biasing force inward in the radial direction. That is, the biasing member 7 attached to the rotating unit applies a biasing force to move the rotating unit and the stationary unit away from each other in the XY plane (preferably in the radial direction). By applying such a biasing force, even if a clearance is formed between the male threaded portion 611 and the female threaded portion 53 in the screw feeding mechanism, they can rotate relative to each other while maintaining a state in which they are in contact with each other. , it is possible to reduce rattling and reduce operating noise.

離隔部７３は、マグネットロータ６３の下端部よりも下側に配置され、且つ、その先端がケース６２から離隔するように配置されている。 The separation part 73 is arranged below the lower end of the magnet rotor 63, and is arranged so that its tip is separated from the case 62.

次に、図３に基づいて本実施形態の電動弁１が設けられる冷凍サイクルシステムの一例について説明する。この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。電動弁１は、室内熱交換器１０１と室外熱交換器１０４との間に設けられている。そして、電動弁１、室内熱交換器１０１、四方切換弁１０２、圧縮機１０３及び室外熱交換器１０４は、冷凍サイクルを構成している。室内熱交換器１０１及び電動弁１は室内に設置され、四方切換弁１０２、圧縮機１０３及び室外熱交換器１０４は室外に設置されていて冷暖房装置を構成している。 Next, an example of a refrigeration cycle system in which the electric valve 1 of this embodiment is provided will be described based on FIG. 3. This refrigeration cycle system is used, for example, in an air conditioner such as a household air conditioner. The electric valve 1 is provided between an indoor heat exchanger 101 and an outdoor heat exchanger 104. The electric valve 1, the indoor heat exchanger 101, the four-way switching valve 102, the compressor 103, and the outdoor heat exchanger 104 constitute a refrigeration cycle. The indoor heat exchanger 101 and the electric valve 1 are installed indoors, and the four-way switching valve 102, the compressor 103, and the outdoor heat exchanger 104 are installed outdoors, forming an air-conditioning device.

以上の本実施形態によれば、付勢部材７が設けられていることで、ねじ送り機構における作動音を低減することができる。また、被取付部７１がＺ方向に直交するように延在していることで、Ｚ方向から取付対象である中央部６３１に被取付部７１を重ねて取り付けることができる。従って、被取付部がＺ方向に延在する構成と比較して、取付対象に対する取付作業が容易となり、組立性を向上させることができる。 According to the present embodiment described above, the provision of the biasing member 7 makes it possible to reduce the operating noise in the screw feeding mechanism. Further, since the attached portion 71 extends perpendicularly to the Z direction, the attached portion 71 can be attached to the central portion 631, which is the attachment target, from the Z direction in an overlapping manner. Therefore, compared to a configuration in which the attached portion extends in the Z direction, the attachment work to the attachment target becomes easier, and the ease of assembly can be improved.

また、被取付部７１に貫通孔７１１が形成され、被取付部７１がロータ軸６１とマグネットロータ６３とによって挟み込まれて取り付けられることで、接着や溶接等の作業が必要なく、組立性をさらに向上させることができる。 In addition, a through hole 711 is formed in the attached part 71, and the attached part 71 is sandwiched and attached between the rotor shaft 61 and the magnet rotor 63, thereby eliminating the need for work such as gluing or welding, and further improving assembly efficiency. can be improved.

また、付勢部材７が離隔部７３を有することで、付勢部材７を構成する板金の端縁が摺接対象である支持部材５に摺接することを抑制することができる。従って、摺接時に生じる摩擦力を低減し、摩耗や騒音を抑制することができる。 Moreover, since the biasing member 7 has the separation part 73, it is possible to suppress the edge of the sheet metal forming the biasing member 7 from slidingly contacting the support member 5, which is the object of sliding contact. Therefore, the frictional force generated during sliding contact can be reduced, and wear and noise can be suppressed.

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。以下に説明する各変形例では、前記実施形態と同様の構成には共通の符号を付すとともに説明を省略する。前記実施形態では、被取付部７１が、固定側ユニットを構成する２部品であるロータ軸６１とマグネットロータ６３とによって挟み込まれるものとしたが、固定側ユニットのうち被取付部７１を挟み込む部材は、これらに限定されない。図４に示す第１の変形例では、ロータ軸６１にリング６５が取り付けられ、被取付部７１が中央部６３１とリング６５とによってＺ方向から挟み込まれている。即ち、リング６５は、ロータ軸６１の小径部６１２よりも大径に形成されるとともに貫通孔７１１を通過不能となっており、大径部６１３と同様の機能を有している。また、被取付部７１は、固定側ユニットを構成する３部品以上によって挟み込まれていてもよい。 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. In each modified example described below, the same components as those in the embodiment described above are given the same reference numerals, and the description thereof will be omitted. In the embodiment described above, the attached part 71 is sandwiched between the rotor shaft 61 and the magnet rotor 63, which are the two parts that constitute the fixed side unit. However, the member of the fixed side unit that sandwiches the attached part 71 is , but not limited to. In the first modification shown in FIG. 4, a ring 65 is attached to the rotor shaft 61, and the attached portion 71 is sandwiched between the center portion 631 and the ring 65 from the Z direction. That is, the ring 65 is formed to have a larger diameter than the small diameter portion 612 of the rotor shaft 61 and cannot pass through the through hole 711, and has the same function as the large diameter portion 613. Moreover, the attached part 71 may be sandwiched between three or more parts that constitute the fixed side unit.

上記のようにロータ軸６１とは別部品のリング６５を用いる場合、リング６５は、ロータ軸６１に接着等により固定されてもよいし、以下のように螺合により固定されてもよい。即ち、リング６５の内周面に雌ねじを形成するとともに、ロータ軸６１の外周面に雄ねじを形成し、これらを螺合させてもよい。このとき、ロータ軸６１をマグネットロータ６３に固着しておき、このロータ軸６１を貫通孔７１１に通過するようにして付勢部材７を設けた後に、リング６５をロータ軸６１に対して締結すればよい。 When using the ring 65 as a separate component from the rotor shaft 61 as described above, the ring 65 may be fixed to the rotor shaft 61 by adhesive or the like, or may be fixed by screwing as described below. That is, a female thread may be formed on the inner peripheral surface of the ring 65 and a male thread may be formed on the outer peripheral surface of the rotor shaft 61, and these may be screwed together. At this time, the rotor shaft 61 is fixed to the magnet rotor 63, the biasing member 7 is provided so that the rotor shaft 61 passes through the through hole 711, and then the ring 65 is fastened to the rotor shaft 61. Bye.

また、前記実施形態では、被取付部７１には、ロータ軸６１が通過可能な通過部として貫通孔７１１が形成されているものとしたが、被取付部には通過部として切り欠き等が形成されていてもよい。 Further, in the above embodiment, the through hole 711 is formed in the attached part 71 as a passage part through which the rotor shaft 61 can pass, but a cutout or the like is formed in the attached part as a passage part. may have been done.

また、前記実施形態では、付勢部材７が回転側ユニットに取り付けられるものとしたが、付勢部材は固定側ユニットに取り付けられてもよい。例えば第２の変形例として図５に示すように、固定側ユニットに取り付けられるとともに回転側ユニットに摺接する付勢部材８を設けてもよい。付勢部材８は、例えば帯板状の板金によって形成された板ばねであって、被取付部８１と一対のアーム部８２と離隔部８３と摺接部８４とを一体に有する。 Further, in the embodiment described above, the biasing member 7 is attached to the rotating unit, but the biasing member may be attached to the stationary unit. For example, as a second modification, as shown in FIG. 5, a biasing member 8 may be provided that is attached to the stationary unit and slides into contact with the rotating unit. The biasing member 8 is a leaf spring formed of, for example, a band-shaped sheet metal, and integrally includes an attached portion 81, a pair of arm portions 82, a separating portion 83, and a sliding portion 84.

被取付部８１は、ＸＹ平面に沿って延在しており、例えばＺ方向から見て円環状又はＣ字状となっている。被取付部８１は、支持部材５のフランジ部５１の上面に重なるように配置され、例えば溶接等によって固定されることにより、固定側ユニットに取り付けられている。一対のアーム部８２は、被取付部８１の内周縁からＺ方向上側に向かって延び、Ｚ方向上側に向かうにしたがって径方向外側に向かうように（即ち互いに離れるように）傾斜している。離隔部８３は、アーム部８２の上端に連続し、Ｚ方向上側に向かうにしたがって径方向内側に向かうように（回転側ユニットを構成するマグネットロータ６３から離れるように）傾斜している。摺接部８４は、アーム部８２と離隔部８３との間に形成された角部であって、マグネットロータ６３の内周面に接触することにより、回転側ユニットに摺接する。アーム部８２は、被取付部８１と摺接部８４との間に形成された変形部である。 The attached portion 81 extends along the XY plane, and has, for example, an annular shape or a C-shape when viewed from the Z direction. The attached portion 81 is arranged so as to overlap the upper surface of the flange portion 51 of the support member 5, and is attached to the stationary unit by being fixed, for example, by welding or the like. The pair of arm portions 82 extend upward in the Z direction from the inner circumferential edge of the attached portion 81, and are inclined radially outward (that is, away from each other) as they move upward in the Z direction. The separation part 83 is continuous with the upper end of the arm part 82 and is inclined radially inward (away from the magnet rotor 63 constituting the rotating unit) as it goes upward in the Z direction. The sliding contact portion 84 is a corner portion formed between the arm portion 82 and the separation portion 83, and comes into sliding contact with the rotating side unit by contacting the inner circumferential surface of the magnet rotor 63. The arm portion 82 is a deformed portion formed between the attached portion 81 and the sliding contact portion 84 .

自然状態の付勢部材８において、一対の摺接部８４同士の間隔は、マグネットロータ６３の内径よりも大きくなっている。従って、一対の摺接部８４をマグネットロータ６３の内側に配置した際、アーム部８２が径方向内側に向かって縮むように撓み変形し、付勢部材８は、マグネットロータ６３に対して径方向外側への付勢力を付与する。即ち、付勢部材８は、回転側ユニットと固定側ユニットとを径方向において互いに遠ざけるように付勢力を付与する。 In the biasing member 8 in its natural state, the distance between the pair of sliding contact portions 84 is larger than the inner diameter of the magnet rotor 63. Therefore, when the pair of sliding contact portions 84 are arranged inside the magnet rotor 63, the arm portions 82 are flexibly deformed to contract radially inward, and the biasing member 8 is radially outward with respect to the magnet rotor 63. Gives a biasing force to. That is, the biasing member 8 applies a biasing force to move the rotating unit and the stationary unit away from each other in the radial direction.

このような第２の変形例によれば、ロータ軸６１が直進運動しても、付勢部材８は直進運動せず、ねじ送り機構における噛み合い部分と付勢部材８（特に摺接部８４）との相対位置が変化しない。即ち、噛み合い部分に作用する付勢力が変化しにくく、弁体３の位置が変化しても作動音を抑制しやすい。 According to such a second modification, even if the rotor shaft 61 moves linearly, the biasing member 8 does not move linearly, and the meshing portion of the screw feeding mechanism and the biasing member 8 (particularly the sliding contact portion 84) The relative position with respect to the target does not change. That is, the biasing force acting on the meshing portion does not easily change, and even if the position of the valve body 3 changes, it is easy to suppress operating noise.

また、前記実施形態では、付勢部材７の被取付部７１に通過部としての貫通孔７１１が形成され、被取付部７１が２部品によってＺ方向から挟み込まれることで取り付けられるものとしたが、被取付部の取付位置及び取付方法はこれに限定されない。例えば第３の変形例として図６、７に示すように、マグネットロータ６３の下端面に取り付けられる付勢部材９を用いてもよい。付勢部材９は、例えば帯板状の板金によって形成された板ばねであって、被取付部９１と一対のアーム部９２と離隔部９３と摺接部９４とを一体に有する。 Further, in the above embodiment, the through hole 711 as a passage part is formed in the attached part 71 of the biasing member 7, and the attached part 71 is attached by being sandwiched between two parts from the Z direction. The mounting position and mounting method of the mounted part are not limited to this. For example, as a third modification, as shown in FIGS. 6 and 7, a biasing member 9 attached to the lower end surface of the magnet rotor 63 may be used. The biasing member 9 is a leaf spring formed of, for example, a strip-shaped sheet metal, and integrally includes an attached portion 91, a pair of arm portions 92, a separating portion 93, and a sliding portion 94.

被取付部９１は、ＸＹ平面に沿って延在しており、例えばＺ方向から見て円環状又はＣ字状となっている。被取付部９１は、マグネットロータ６３の下端面に重なるように配置され、例えば熱カシメ等によって固定されることにより、回転側ユニットに取り付けられている。ここで、マグネットロータ６３は、筒状のマグネット収容部としてのケース６２の内周面に沿うように設けられ、下端面６３２とは、マグネットロータ６３のうちケース６２の内周面に沿った磁極部の下面を指す。 The attached portion 91 extends along the XY plane, and has, for example, an annular shape or a C-shape when viewed from the Z direction. The attached portion 91 is arranged so as to overlap the lower end surface of the magnet rotor 63, and is attached to the rotation side unit by being fixed, for example, by thermal caulking or the like. Here, the magnet rotor 63 is provided along the inner peripheral surface of the case 62 as a cylindrical magnet housing part, and the lower end surface 632 refers to the magnetic poles of the magnet rotor 63 along the inner peripheral surface of the case 62. Points to the bottom of the part.

一対のアーム部９２は、被取付部９１の内周縁からＺ方向上側に向かって延び、Ｚ方向上側に向かうにしたがって径方向内側に向かうように（即ち互いに近づくように）傾斜している。離隔部９３は、アーム部９２の上端に連続し、Ｚ方向上側に向かうにしたがって径方向外側に向かうように（固定側ユニットを構成する支持部材５から離れるように）傾斜している。摺接部９４は、アーム部９２と離隔部９３との間に形成された角部であって、支持部材５の大径部５６の内周面に接触することにより、固定側ユニットに摺接する。アーム部９２は、被取付部９１と摺接部９４との間に形成された変形部である。 The pair of arm parts 92 extend upward in the Z direction from the inner circumferential edge of the attached part 91, and are inclined radially inward (that is, closer to each other) as they go upward in the Z direction. The separation part 93 is continuous with the upper end of the arm part 92 and is inclined radially outward (away from the support member 5 constituting the fixed unit) as it goes upward in the Z direction. The sliding contact portion 94 is a corner formed between the arm portion 92 and the separation portion 93, and comes into sliding contact with the stationary unit by contacting the inner peripheral surface of the large diameter portion 56 of the support member 5. . The arm portion 92 is a deformed portion formed between the attached portion 91 and the sliding contact portion 94.

自然状態の付勢部材９において、一対の摺接部９４同士の間隔は、大径部５６の外径よりも小さくなっている。従って、一対の摺接部９４の間に支持部材５を配置した際、アーム部９２が径方向外側に押し広げられるように撓み変形し、付勢部材９は、支持部材５に対して径方向内側への付勢力を付与する。即ち、付勢部材９は、回転側ユニットと固定側ユニットとを径方向において互いに遠ざけるように付勢力を付与する。 In the biasing member 9 in its natural state, the distance between the pair of sliding contact portions 94 is smaller than the outer diameter of the large diameter portion 56 . Therefore, when the support member 5 is disposed between the pair of sliding contact parts 94, the arm part 92 is bent and deformed so as to be pushed outward in the radial direction, and the biasing member 9 is Gives an inward bias. That is, the biasing member 9 applies a biasing force to move the rotating unit and the stationary unit away from each other in the radial direction.

このような第３の変形例によれば、マグネットロータ６３のうち下端面の近傍では、他の部材との干渉が生じにくく、組立性を向上させやすい。また、アーム部９２が被取付部９１と摺接部９４との間においてＺ方向に沿って延在していることにより、被取付部９１と摺接部９４とをＺ方向において適宜にずらして配置することができ、摺接部９４を固定側ユニットのうち所望の位置に摺接させやすくすることができる。 According to such a third modification, interference with other members is less likely to occur in the vicinity of the lower end surface of the magnet rotor 63, making it easier to assemble. Furthermore, since the arm portion 92 extends along the Z direction between the attached portion 91 and the sliding contact portion 94, the attached portion 91 and the sliding contact portion 94 can be appropriately shifted in the Z direction. The sliding contact portion 94 can be easily brought into sliding contact with a desired position of the fixed unit.

また、付勢部材の被取付部の取付位置及び取付方法や、摺接部の摺接対象は上記に限定されない。特に、被取付部の取付方法については、取付対象の形状や材質等に応じて適宜に選択されればよい。また、被取付部は、軸方向に交差していればよく、軸方向との直交面に対して多少の傾きを有していてもよい。 Further, the mounting position and method of mounting the portion to which the biasing member is mounted, and the object of sliding contact of the sliding contact portion are not limited to those described above. In particular, the method for attaching the attached part may be appropriately selected depending on the shape, material, etc. of the attachment target. Further, the attached portion only needs to intersect with the axial direction, and may have some inclination with respect to a plane perpendicular to the axial direction.

また、前記実施形態では、付勢部材７の全体が板金によって形成され、離隔部７３が形成されているものとしたが、このような形態に限定されない。即ち、付勢部材は複数部材（例えば弾性部材及び剛体）によって構成されていてもよいし、離隔部が形成されていなくてもよい。例えば、板金の端縁にフッ素樹脂製の摺動部材を設けるとともこの部分を摺接部としてもよい。また、所定の厚さを有する板金を用いたり、板金の端縁に面取り加工を施したりすることにより、端縁を摺接部としつつ摺接時に生じる摩擦力を低減してもよい。これは、第１～第３の変形例についても同様である。 Furthermore, in the embodiment described above, the entire biasing member 7 is formed of a sheet metal, and the separating portion 73 is formed therein, but the present invention is not limited to such a configuration. That is, the biasing member may be composed of a plurality of members (for example, an elastic member and a rigid body), and the separating portion may not be formed. For example, a sliding member made of fluororesin may be provided at the edge of the sheet metal, and this portion may be used as a sliding contact portion. Further, by using a sheet metal having a predetermined thickness or by chamfering the edges of the sheet metal, the frictional force generated during sliding contact may be reduced while using the edges as sliding contact parts. This also applies to the first to third modified examples.

また、前記実施形態では、付勢部材７が一対の摺接部７２１及び一対の変形部７２２を有するものとしたが、摺接部及び変形部の数は任意である。これは、第１～第３の変形例についても同様である。このとき、複数の摺接部及び変形部を均等に設けることで付勢力の合力が０となるようにしてもよいし、１つの摺接部及び変形部を設けたり、複数の摺接部及び変形部を不均等に設けたりすることで、付勢力の合力が０とならないようにしてもよい。即ち、ねじ送り機構において、雄ねじ部と雌ねじ部との中心軸同士が一致してもよいし、中心軸同士に多少のずれが生じてもよい。 Further, in the embodiment described above, the biasing member 7 has a pair of sliding contact portions 721 and a pair of deformation portions 722, but the number of sliding contact portions and deformation portions is arbitrary. This also applies to the first to third modified examples. At this time, a plurality of sliding contact parts and deformation parts may be provided evenly so that the resultant force of the urging force becomes 0, or one sliding contact part and deformation part may be provided, or a plurality of sliding contact parts and deformation parts may be provided. The resultant force of the urging force may be prevented from becoming zero by providing the deforming portions unevenly. That is, in the screw feeding mechanism, the central axes of the male threaded portion and the female threaded portion may coincide with each other, or there may be some deviation between the central axes.

また、前記実施形態及び第１～第３の変形例では、電動弁１が１つの弁体３のみを有するものとしたが、例えば主弁と副弁とを有し弁開度を二段階で調整可能な電動弁に付勢部材を設けてもよい。その他、付勢部材が設けられる電動弁は、ステッピングモータ等の回転駆動手段及びねじ送り機構を備えたものであればよく、上記の形態に限定されない。 In addition, in the embodiment and the first to third modifications, the electric valve 1 has only one valve body 3, but for example, it has a main valve and a sub valve, and the valve opening degree can be adjusted in two stages. The adjustable motor-operated valve may be provided with a biasing member. In addition, the electric valve provided with the biasing member is not limited to the above-mentioned form as long as it is provided with a rotational drive means such as a stepping motor and a screw feeding mechanism.

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 above in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and the design may be changed without departing from the gist of the present invention. Even if there is, it is included in the present invention.

１…電動弁、２…弁ハウジング、２Ａ…弁室、２５…弁ポート、３…弁体、５…支持部材（固定側部材）、６…ステッピングモータ（回転駆動手段）、６１…ロータ軸（回転側部材）、６２…ケース（マグネット収容部）、６３…マグネットロータ（マグネット）、７～９…付勢部材、７１，８１，９１…被取付部、７１１…貫通孔（通過部）、７２１，８４，９４…摺接部、７２２，８２，９２…変形部、７３，８３，９３…離隔部 DESCRIPTION OF SYMBOLS 1... Electric valve, 2... Valve housing, 2A... Valve chamber, 25... Valve port, 3... Valve body, 5... Support member (fixed side member), 6... Stepping motor (rotation drive means), 61... Rotor shaft ( Rotating side member), 62... Case (magnet accommodating part), 63... Magnet rotor (magnet), 7 to 9... Biasing member, 71, 81, 91... Mounted part, 711... Through hole (passing part), 721 , 84, 94...Sliding contact part, 722, 82, 92...Deformation part, 73, 83, 93... Separation part

Claims (6)

弁ハウジングと、前記弁ハウジングに設けられた弁室の弁ポートの開度を変更する弁体と、ロータ軸を回転させる回転駆動手段と、前記ロータ軸の回転運動を直進運動に変換することで前記弁体を軸方向に進退移動させるねじ送り機構と、を備えた電動弁であって、
前記ねじ送り機構を構成する回転側部材を含む回転側ユニットと、
前記ねじ送り機構を構成する固定側部材を含む固定側ユニットと、
前記回転側ユニットと前記固定側ユニットとを、前記軸方向に直交する平面内において互いに遠ざけるように付勢力を付与する付勢部材と、を備え、
前記付勢部材は、前記軸方向と交差するように延在するとともに前記回転側ユニットと前記固定側ユニットとのうち一方に取り付けられる被取付部と、前記回転側ユニットと前記固定側ユニットとのうち他方に摺接する摺接部と、前記被取付部と前記摺接部との間において前記軸方向に沿って延在する変形部と、を有することを特徴とする電動弁。 A valve housing, a valve body that changes the opening degree of a valve port of a valve chamber provided in the valve housing, a rotation drive means that rotates a rotor shaft, and a rotary drive means that converts the rotational motion of the rotor shaft into a linear motion. An electric valve comprising a screw feeding mechanism that moves the valve body forward and backward in the axial direction,
a rotation-side unit including a rotation-side member constituting the screw feeding mechanism;
a fixed side unit including a fixed side member constituting the screw feeding mechanism;
a biasing member that applies a biasing force to move the rotating unit and the stationary unit away from each other in a plane orthogonal to the axial direction;
The biasing member includes an attached part that extends to intersect with the axial direction and is attached to one of the rotating unit and the stationary unit, and an attached part that extends between the rotating unit and the stationary unit. An electric valve comprising: a sliding contact portion that slides on the other of the two, and a deformable portion that extends along the axial direction between the attached portion and the sliding contact portion. 前記被取付部は、前記ロータ軸が通過可能な通過部を有するとともに、前記回転側ユニットを構成する少なくとも２部品によって前記軸方向から挟み込まれることにより、前記回転側ユニットに取り付けられることを特徴とする請求項１に記載の電動弁。 The attached part has a passage part through which the rotor shaft can pass, and is attached to the rotating unit by being sandwiched from the axial direction by at least two parts constituting the rotating unit. The electric valve according to claim 1. 前記回転側ユニットは、筒状のマグネット収容部の内周面に沿うように設けられたマグネットを含み、
前記被取付部は、前記マグネットのうち、前記軸方向における弁閉側の端面に固定されることを特徴とする請求項１に記載の電動弁。 The rotation side unit includes a magnet provided along the inner circumferential surface of the cylindrical magnet accommodating part,
The electric valve according to claim 1, wherein the attached portion is fixed to an end face of the magnet on the valve closing side in the axial direction. 前記被取付部は、前記固定側ユニットに取り付けられることを特徴とする請求項１に記載の電動弁。 The electric valve according to claim 1, wherein the attached portion is attached to the stationary unit. 前記付勢部材は、全体が板金により形成され、前記摺接部のうち前記変形部とは反対側の端部に連続するとともに摺接対象から離れるように延びる離隔部を有することを特徴とする請求項１～４のいずれか１項に記載の電動弁。 The biasing member is entirely formed of a sheet metal, and has a separating portion that is continuous with an end of the sliding contact portion opposite to the deformed portion and extends away from the object of sliding contact. The electric valve according to any one of claims 1 to 4. 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１～５のいずれか１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 comprising a compressor, a condenser, an expansion valve, and an evaporator, wherein the electric valve according to any one of claims 1 to 5 is used as the expansion valve. A refrigeration cycle system characterized by:
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JP6472637B2 (en) * 2014-10-30 2019-02-20 株式会社鷺宮製作所 Motorized valve
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JP2000179705A (en) 1998-12-18 2000-06-27 Sharp Corp Fluid control valve
JP2007255573A (en) 2006-03-23 2007-10-04 Fuji Koki Corp Motor operated valve
JP2018119613A (en) 2017-01-25 2018-08-02 株式会社鷺宮製作所 Motor valve and refrigeration cycle system

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