JP2005325888A - Motor operated valve - Google Patents

Motor operated valve Download PDF

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Publication number
JP2005325888A
JP2005325888A JP2004143275A JP2004143275A JP2005325888A JP 2005325888 A JP2005325888 A JP 2005325888A JP 2004143275 A JP2004143275 A JP 2004143275A JP 2004143275 A JP2004143275 A JP 2004143275A JP 2005325888 A JP2005325888 A JP 2005325888A
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Prior art keywords
valve
valve body
shaft
rotor
motor
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JP2005325888A5 (en
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Tomoari Ouchi
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Fujikoki Corp
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Fujikoki Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor operated valve having a simple stopper mechanism/operation of a rotor. <P>SOLUTION: By rotating the rotor 21 by a stepping motor 30, a valve element 26 is separated from/brought in contact with a valve seat 10. A valve shaft 20 is integrally provided in the rotor 21. The valve element 26 is closed by making it abut on the valve seat 10 by operation of the valve shaft 20. With respect to the valve shaft 20, the valve element 26 can be moved and rotated in the axial direction, and a spring 28 is provided in the valve seat 10 side so as to be projectable. A cylindrical valve element holding part 27 is fitted to the valve element 26, and the lower part of the valve shaft 20 is arranged inside the valve element holding part 27 so as to enter and leave. A spherical ball 25 is interposed between the end portion of the lower part inside the valve element holding part 27 and the upper face of the valve element 26 via a predetermined clearance C. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は空気調和装置、冷凍装置の冷凍サイクル等に用いられる電動弁に関する。   The present invention relates to an electric valve used for an air conditioner, a refrigeration cycle of a refrigeration apparatus, and the like.

空気調和機、冷凍機等に組み込まれて使用される電動弁は、公知のものとして下記の特許文献１に記載のものが挙げられる。
この刊行物に記載の電動弁のロータのストッパは、ロータ側にストッパ面部を形成すると共に、弁シート側に前記ストッパ面部が当接するストッパ片を設けるものである。このようなステッピングモータによりロータを回転し、弁シートに対して弁体を離接させる電動弁においては、上述したロータのストッパを設けないと、弁体が弁シートに着座後も、ロータは弁軸を弁シート方向へ変位させ、必要以上の荷重が弁体から弁シートへの押圧荷重として付加され、その結果，弁シートから弁体を離間させるときに、両部材の食い付きにより、安定した開弁挙動を得ることができないことがある。このロータの回転規制を行うストッパを設ける場合には、ロータの高さ方向や回転方向の位置決め調整が必要となり、その結果、製造時の組立工数の増加となり、コスト高となるという問題があった。
特開２００２−１４７９００号公報 As a motor-operated valve incorporated and used in an air conditioner, a refrigerator, or the like, a known one described in Patent Document 1 below can be cited.
The stopper of the rotor of the electric valve described in this publication has a stopper surface portion on the rotor side and a stopper piece with which the stopper surface portion abuts on the valve seat side. In an electric valve that rotates the rotor by such a stepping motor and separates the valve body from the valve seat, if the above-described rotor stopper is not provided, the rotor will remain in the valve even after the valve body is seated on the valve seat. The shaft is displaced in the direction of the valve seat, and an excessive load is added as a pressing load from the valve body to the valve seat. As a result, when the valve body is separated from the valve seat, the two members bite and become stable. The valve opening behavior may not be obtained. In the case of providing a stopper for restricting the rotation of the rotor, positioning adjustment in the height direction and the rotation direction of the rotor is necessary, resulting in an increase in the number of assembly steps at the time of manufacturing, resulting in a high cost. .
JP 2002-147900 A

したがって、本発明の課題は、上記問題を解決することにあり、ステッピングモータによりロータを回転し、弁シートに対して弁体を離接させる電動弁において、ストッパ機構の構成及び動作がともに簡単で、ロータの高さ方向・回転方向の位置決め調整を必要としない電動弁を提供することにある。   Accordingly, an object of the present invention is to solve the above problem, and in the motor operated valve that rotates the rotor by a stepping motor and separates the valve body from the valve seat, the configuration and operation of the stopper mechanism are both simple. Another object of the present invention is to provide an electric valve that does not require positioning adjustment in the height direction / rotation direction of the rotor.

前記目的を達成すべく、本発明は、下記の手段を採用した。
請求項１記載の電動弁は、ステッピングモータによってロータを回転させて、弁シートに対して弁体を離接させる電動弁において、ロータに弁軸を一体に設け、弁軸の動作により弁体を弁シートに当接させることで弁体を閉とすると共に、上記弁軸に対して、その軸線方向において弁体を移動、及び、回転可能で、且つ、弁シート側に突出勝手にバネを付設したことを特徴とする。 In order to achieve the above object, the present invention employs the following means.
According to a first aspect of the present invention, there is provided a motor-operated valve in which a rotor is rotated by a stepping motor so that the valve body is separated from and connected to the valve seat. The valve body is closed by abutting against the valve seat, and the valve body can be moved and rotated in the axial direction with respect to the valve shaft, and a spring is provided on the valve seat side. It is characterized by that.

請求項２記載の電動弁は、上記請求項１記載の手段において、弁体には筒状の弁体保持部を装着し、該弁体保持部内に弁軸の下部を出入可能に配置すると共に、上記弁体保持部内で上記下部の端部と弁体の上面との間に所定のクリアランスを介して球状のボールを介装させたことを特徴とする。
請求項３記載の電動弁は、上記請求項１記載の手段において、弁体には筒状の弁体保持部を装着し、該弁体保持部内に弁軸の下部を出入可能に配置すると共に、上記弁体保持部内で上記下部の端部と弁体の上面に形成した球面部との間に所定のクリアランスを設けたことを特徴とする。 According to a second aspect of the present invention, there is provided the motor-operated valve according to the first aspect, wherein the valve body is provided with a cylindrical valve body holding portion, and the lower portion of the valve shaft is disposed in the valve body holding portion so as to be able to enter and exit. In the valve body holding part, a spherical ball is interposed between the lower end part and the upper surface of the valve body with a predetermined clearance.
According to a third aspect of the present invention, there is provided the motor-operated valve according to the first aspect, wherein the valve body is provided with a cylindrical valve body holding portion, and a lower portion of the valve shaft is disposed in the valve body holding portion so as to be able to enter and exit. In the valve body holding part, a predetermined clearance is provided between the lower end part and the spherical part formed on the upper surface of the valve body.

請求項４記載の電動弁は、上記請求項２又は請求項３記載の手段において、上記弁軸の弁体保持部内の部分にバネ性を有する止め輪を付設し、該止め輪とボール又は球面部との間にバネを縮装させたことを特徴とする。   According to a fourth aspect of the present invention, there is provided the motor-operated valve according to the second or third aspect, wherein a retaining ring having a spring property is attached to a portion inside the valve body holding portion of the valve shaft. A spring is shrunk between the two parts.

本発明は、上記構成により、ロータのストッパを弁シート側等に別途設けなくても、駆動側の弁軸と被駆動側の弁体との間に、弁軸に対して、その軸線方向において弁体を移動及び回転可能で、且つ、弁シート側に突出勝手にバネを付設し、弁軸と弁体との間に所定のクリアランスを介してボールを設けたことにより、円滑なストッパ機能が実現する。また、これにより、弁体の閉時の回転トルクの伝達を減少させ、当接時の磨耗を減少させる。
しかも、本発明によれば、ストッパ機能を実現させるに当って、弁体の高さ及び回転角の調整は不必要であり、従来のロータストッパよりもコストを低廉化させ、組立性がよく、製造時の工数を少なくする効果もある。 With the above configuration, the present invention provides a valve shaft between the driven valve shaft and the driven valve body in the axial direction without providing a rotor stopper separately on the valve seat side or the like. The valve body can be moved and rotated, and a spring is attached to the valve seat side so that it protrudes freely, and a ball is provided between the valve shaft and the valve body with a predetermined clearance, thereby providing a smooth stopper function. Realize. This also reduces the transmission of rotational torque when the valve body is closed, and reduces wear during contact.
Moreover, according to the present invention, it is not necessary to adjust the height and rotation angle of the valve body in realizing the stopper function, the cost is lower than that of the conventional rotor stopper, and the assembly is good. There is also an effect of reducing the man-hours at the time of manufacture.

以下、図面により本発明に係る膨張弁の実施形態について説明する。図１は本発明に係る電動弁の縦断面図、図２は同電動弁の第１状態（Ａ）及び第２状態（Ｂ）の要部縦断面図、図３は本発明に係る電動弁の別例の要部縦断面図である。   Hereinafter, embodiments of an expansion valve according to the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of a motor-operated valve according to the present invention, FIG. 2 is a longitudinal sectional view of an essential part of the motor-operated valve in a first state (A) and a second state (B), and FIG. 3 is a motor-operated valve according to the present invention. It is a principal part longitudinal cross-sectional view of another example of this.

（固定部）
電動弁Ａは、図１に示すように、その固定部として、中心部にシート孔１０ｂが穿設された弁シート１０と、該弁シート１０の外周部に装着された上下に長い筒状の弁ハウジング１３と、弁シート１０の下部に装着された第１配管１１と、弁ハウジング１３の側面に設けられた第２配管１２と、弁ハウジング１３の上部に設けられた合成樹脂製の弁棒保持体１４と、弁ハウジング１３の外周部にリング状に形成された密閉ケース取付枠１８を介して取り付けられた密閉ケース１６と、密閉ケース１６の外周部に取り付けられるステッピングモータ３０と、を具備する。そして、シート孔１０ｂの上部（後述の弁体２６が当接する部分）には、所定深さのシート凹部１０ａが形成される。また、弁ハウジング１３内には弁室１７が形成される。 (Fixed part)
As shown in FIG. 1, the motor-operated valve A has a valve seat 10 having a seat hole 10 b formed in the center as a fixing portion, and a vertically long cylindrical shape mounted on the outer periphery of the valve seat 10. The valve housing 13, the first pipe 11 attached to the lower part of the valve seat 10, the second pipe 12 provided on the side surface of the valve housing 13, and the synthetic resin valve rod provided on the upper part of the valve housing 13 A holding body 14, a sealing case 16 attached to the outer periphery of the valve housing 13 via a sealing case mounting frame 18 formed in a ring shape, and a stepping motor 30 attached to the outer periphery of the sealing case 16 are provided. To do. A sheet recess 10a having a predetermined depth is formed in an upper portion of the seat hole 10b (a portion where a later-described valve body 26 abuts). A valve chamber 17 is formed in the valve housing 13.

図１に示すように、弁棒保持体１４は、上下に長い筒状体として形成され、その軸心部の下方には径大の径大孔部１４ｃが、また、上方には径小孔部１４ｄが形成され、径大孔部１４ｃの側面には均圧孔１４ｂが形成され、径小孔部１４ｄの内周面には雌ねじ部１４ａが形成される。また、弁棒保持体１４下部の外周部には、連結リング１５がインサート成形により嵌合され、この連結リング１５の下面に上記弁ハウジング１３の上端部が当接している。   As shown in FIG. 1, the valve stem holder 14 is formed as a cylindrical body that is long in the vertical direction. A large-diameter large-diameter hole portion 14 c is provided below the shaft center portion, and a small-diameter hole is provided above the shaft center portion. A portion 14d is formed, a pressure equalizing hole 14b is formed on the side surface of the large-diameter hole portion 14c, and a female screw portion 14a is formed on the inner peripheral surface of the small-diameter hole portion 14d. A connecting ring 15 is fitted by insert molding on the outer periphery of the lower portion of the valve stem holder 14, and the upper end of the valve housing 13 is in contact with the lower surface of the connecting ring 15.

（可動部）
また、可動部としては、図１，２に示すように、上記弁シート１０のシート孔１０ｂに離接する下方が紡錘形状の弁体２６と、弁体２６の上面周部に装着される上下に長い筒状の弁体保持部２７と、弁体保持部２７の上部筒内に嵌合されて所定幅で摺動（上下動）可能な棒状の弁軸２０と、弁軸２０の上部に一体に設けられたロータ２１を回転させるステッピングモータ３０とを具備する。なお、弁軸２０の上部には、弁棒保持体１４の径小孔部１４ｄの内周面に形成されている雌ねじ部１４ａに螺合する雄ねじ部２０ａが形成され、弁軸２０の下部には、弁軸細径部２３が形成されている。 (movable part)
As shown in FIGS. 1 and 2, the movable part has a spindle-shaped valve body 26 on the lower side that is separated from and in contact with the seat hole 10 b of the valve seat 10, and upper and lower parts that are attached to the upper peripheral portion of the valve body 26. A long cylindrical valve body holding portion 27, a rod-shaped valve shaft 20 that is fitted in the upper cylinder of the valve body holding portion 27 and that can slide (up and down) with a predetermined width, and an upper portion of the valve shaft 20 are integrated. And a stepping motor 30 for rotating the rotor 21 provided in the motor. The upper part of the valve shaft 20 is formed with a male screw part 20 a that is screwed into the female screw part 14 a formed on the inner peripheral surface of the small-diameter hole part 14 d of the valve stem holder 14. The valve shaft narrow diameter portion 23 is formed.

前記弁体保持部２７は、その下端部が鍔状の径大鍔部２７ａが形成されて弁体２６の上部肩部に溶接されており、また、その上端部は径小の鍔部（窄まり部）が形成され、この径小鍔部２７ｂが弁軸２０下部の弁軸細径部２３の外周に摺動するように形成されている。また、弁体保持部２７の均一径部は径大孔部１４ｃの内周面に摺動可能に形成される。また、径大鍔部２７ａは弁棒保持体１４の下面に当接することで、弁体２６の最上動位置を決めるストッパ機能を有するものである。   The lower end portion of the valve body holding portion 27 is welded to the upper shoulder portion of the valve body 26 having a bowl-like large diameter flange portion 27a, and the upper end portion thereof has a small diameter flange portion (stenosis). The small diameter flange portion 27b is formed so as to slide on the outer periphery of the valve shaft small diameter portion 23 below the valve shaft 20. Moreover, the uniform diameter part of the valve body holding | maintenance part 27 is slidably formed in the internal peripheral surface of the large diameter hole part 14c. Further, the large diameter flange portion 27 a has a stopper function for determining the most moved position of the valve body 26 by contacting the lower surface of the valve rod holder 14.

更に、図２（Ｂ）に弁体保持部２７内で、弁軸細径部２３の下端と弁体２６の上部平面との間には所定のクリアランスＣをもって、硬度が高く且つ表面が潤滑性を具備する球状のボール２５が配置される。なお、ボール２５の直径は弁軸細径部２３の直径より大となるように形成される。   Further, in FIG. 2 (B), in the valve body holding part 27, a predetermined clearance C is provided between the lower end of the valve shaft small diameter part 23 and the upper plane of the valve body 26, and the hardness is high and the surface is lubricious. A spherical ball 25 comprising The diameter of the ball 25 is formed so as to be larger than the diameter of the valve shaft small diameter portion 23.

また、弁軸細径部２３における径小鍔部２７ｂの下部位置にはバネ性を有するＣ形の止め輪２４が嵌合・固定され、この止め輪２４とボール２５との間にはバネ２８が縮装され、該バネ２８はその弾発力により、弁軸２０に対してボール２５を介して弁体２６及び弁体保持部２７を下方（弁シート１０側）に押圧している。このような構成により、弁体２６に対して弁軸２０は回動可能であるばかりでなく、ボール２５はその上下の２点で、弁軸２０と弁体２６とそれぞれ点接触するから、弁軸２０の回転に伴なって摩擦が発生しても、弁体２６に対する摩擦の影響は小さいものとなる。   Further, a C-shaped retaining ring 24 having a spring property is fitted and fixed at a lower position of the small diameter flange portion 27 b in the valve shaft narrow diameter portion 23, and a spring 28 is interposed between the retaining ring 24 and the ball 25. The spring 28 presses the valve body 26 and the valve body holding portion 27 downward (valve seat 10 side) via the ball 25 against the valve shaft 20 due to its elastic force. With such a configuration, the valve shaft 20 is not only rotatable with respect to the valve body 26, but the ball 25 is in point contact with the valve shaft 20 and the valve body 26 at two points above and below the valve body 26. Even if friction is generated as the shaft 20 rotates, the influence of the friction on the valve body 26 is small.

（弁体２６の閉動作）
次に、弁体２６の閉動作について説明する。
図２（Ｂ）に示すように、弁軸２０が上方位置にあって弁体２６が開の状態では、弁軸２０が最上位置にあり、弁体保持筒２７が止め輪２４に係止している。この状態は、弁軸２０の下端部とボール２５との間に最大のクリアランスＣがある状態である。 (Closing operation of the valve body 26)
Next, the closing operation of the valve body 26 will be described.
As shown in FIG. 2B, when the valve shaft 20 is in the upper position and the valve body 26 is open, the valve shaft 20 is in the uppermost position, and the valve body holding cylinder 27 is locked to the retaining ring 24. ing. This state is a state where there is a maximum clearance C between the lower end of the valve shaft 20 and the ball 25.

この状態において、ロータ２１を回転させると、弁軸２３が下動し、その下動途中において弁体２６は弁シート１０に当接する。なお、この間においては、ボール２５の作用はない。しかし、更に、弁軸２０が下動し、弁軸下端（弁軸細径部２３下端）がボール２５に当接することによって、弁軸２０の下動が止まり、ロータ２１の回転が止まる（ロータ２１のストッパ作用）。そして、この当接により、ボール２５はバネ２８の圧縮荷重を制御することになる。この状態は、図１及び図２（Ａ）に示す。
（弁体２６の開動作）
また、弁体２６の開動作について説明する。
弁体２６が閉状態では、弁軸２０が最下位置にあり、弁軸２０の下端がボール２５に当接している（クリアランスＣはなし）。 In this state, when the rotor 21 is rotated, the valve shaft 23 moves downward, and the valve element 26 contacts the valve seat 10 during the downward movement. During this period, the ball 25 has no action. However, when the valve shaft 20 is further moved downward and the lower end of the valve shaft (the lower end of the valve shaft small diameter portion 23) is in contact with the ball 25, the downward movement of the valve shaft 20 is stopped and the rotation of the rotor 21 is stopped (rotor). 21 stopper action). By this contact, the ball 25 controls the compression load of the spring 28. This state is shown in FIG. 1 and FIG.
(Opening operation of valve body 26)
The opening operation of the valve body 26 will be described.
When the valve body 26 is closed, the valve shaft 20 is in the lowest position, and the lower end of the valve shaft 20 is in contact with the ball 25 (no clearance C).

弁体２６の開動作のために、ステッピングモータ３０を作動させ、ロータ２１が逆回転すると、弁軸２０が逆回転しながら上動を開始する。このとき、最初はバネ２８が伸びるだけで弁体２６は弁シート１０に当接したままである。このとき、弁軸２０下部（弁軸細径部２３の下端）はボール２５に点接触状態であるから、弁シート１０から弁体２６を離座させるときの弁体２６の回転押圧をスムースに開放し、開弁挙動を安定化させる。そして、弁軸２０の更なる上動により、止め輪２４が弁体保持筒２７を係止して吊り上げ、弁体２６を開とする。   When the stepping motor 30 is operated to open the valve body 26 and the rotor 21 rotates in the reverse direction, the valve shaft 20 starts to move upward while rotating in the reverse direction. At this time, the valve body 26 remains in contact with the valve seat 10 simply by extending the spring 28 at the beginning. At this time, the lower part of the valve shaft 20 (the lower end of the valve shaft small-diameter portion 23) is in a point contact state with the ball 25. Open and stabilize the valve opening behavior. Then, by further upward movement of the valve shaft 20, the retaining ring 24 engages and lifts the valve body holding cylinder 27 to open the valve body 26.

（効果）
したがって、この電動弁Ａでは、別途ロータのストッパを設けなくても、弁軸２０と弁体２６との間のボール２５の配置に加えて、バネ性を有する止め輪２４及びバネ２８を設けたことにより、円滑なストッパ機能が実現する。また、弁体２６の開時の弁軸２３からの回転トルクの伝達は減少する。また、本電動弁Ａでは、弁体２６の高さ及び回転角の調整は不必要であり、組立性がよく、製造時の工数少ないから、従来のロータストッパよりも、コストを一層低減することができるという効果もある。 (effect)
Therefore, in this motor-operated valve A, in addition to the arrangement of the ball 25 between the valve shaft 20 and the valve body 26, the retaining ring 24 and the spring 28 having spring properties are provided without providing a separate rotor stopper. As a result, a smooth stopper function is realized. Further, the transmission of rotational torque from the valve shaft 23 when the valve body 26 is opened decreases. In addition, the motor-operated valve A does not require adjustment of the height and rotation angle of the valve body 26, is easy to assemble, and has fewer man-hours for manufacturing. Therefore, the cost can be further reduced compared to the conventional rotor stopper. There is also an effect that can be done.

（別例）
上記実施例におけるボール２５の代替例として、図３に示すように、弁体２６の上面を弁体保持部２７内に突出させてその上面を曲面状にした球面部２６ａとしても上記実施例と同様の効果が得られる。そして、この場合には、バネ２８は、球面部２６ａと止め輪２４との間に縮装されることになる。なお、クリアランスは符号Ｃ'として表している。また、更なる別例として、上記止め輪２４に代えてバネ性を有するワッシャを用いても良い。また、バネの頭頂部を球体面としてもよい。 (Another example)
As an alternative example of the ball 25 in the above-described embodiment, as shown in FIG. 3, a spherical surface portion 26a in which the upper surface of the valve body 26 protrudes into the valve body holding portion 27 and the upper surface is curved may be used. Similar effects can be obtained. In this case, the spring 28 is contracted between the spherical portion 26 a and the retaining ring 24. The clearance is represented as C ′. As yet another example, a washer having a spring property may be used in place of the retaining ring 24. Further, the top of the spring may be a spherical surface.

本発明に係る電動弁の縦断面図。The longitudinal cross-sectional view of the motor operated valve which concerns on this invention. 同電動弁の第１状態（Ａ）及び第２状態（Ｂ）の要部縦断面図。The principal part longitudinal cross-sectional view of the 1st state (A) and 2nd state (B) of the same motor operated valve. 本発明に係る電動弁の別例の要部縦断面図。The principal part longitudinal cross-sectional view of another example of the motor operated valve which concerns on this invention.

符号の説明Explanation of symbols

Ａ・・電動弁 Ｃ・・クリアランス
１０・・弁シート １０ａ・・シート凹部 １０ｂ・・シート孔
１１・・第１配管１２・・第２配管 １３・・弁ハウジング
１４・・弁棒保持体 １４ａ・・雌ねじ部 １４ｂ・・均圧孔
１４ｃ・・径大孔部 １４ｄ・・径小孔部
１５・・連結リング １８・・密閉ケース取付枠 １６・・密閉ケース
１７・・弁室 A ... Motorized valve C ... Clearance 10 ... Valve seat 10a ... Seat recess 10b ... Seat hole 11 ... First pipe 12 ... Second pipe 13 ... Valve housing 14 ... Valve stem holder 14a ... · Female screw portion 14b · · Pressure equalizing hole 14c · · Large diameter hole portion 14d · · Small diameter hole portion 15 · · Connection ring 18 · · Sealing case mounting frame 16 · · Sealing case 17 · · Valve chamber

２０・・弁軸 ２０ａ・・雄ねじ部 ２１・・ロータ ２３・・弁軸細径部
２４・・止め輪 ２５・・ボール ２６・・弁体 ２６ａ・・球面部
２７・・弁体保持筒 ２７ａ・・径大鍔部 ２７ｂ・・径小鍔部
２８・・バネ ３０・・ステッピングモータ 20 .. Valve shaft 20a .. Male thread portion 21.. Rotor 23... Valve shaft narrow diameter portion 24... Retaining ring 25.. Ball 26.. Valve body 26a ... Spherical surface portion 27.・ Diameter collar part 27b ・ ・ Diameter collar part 28 ・ ・ Spring 30 ・ ・ Stepping motor

Claims (4)

ステッピングモータによってロータを回転させて、弁シートに対して弁体を離接させる電動弁において、ロータに弁軸を一体に設け、弁軸の動作により弁体を弁シートに当接させることで弁体を閉とすると共に、上記弁軸に対して、その軸線方向において弁体を移動、及び、回転可能で、且つ、弁シート側に突出勝手にバネを付設したことを特徴とする電動弁。   In an electric valve that rotates a rotor by a stepping motor and separates the valve body from the valve seat, the valve shaft is integrated with the rotor, and the valve body is brought into contact with the valve seat by the operation of the valve shaft. A motor-operated valve characterized in that the body is closed, the valve body can be moved and rotated in the axial direction with respect to the valve shaft, and a spring is attached to the valve seat side. 弁体には筒状の弁体保持部を装着し、該弁体保持部内に弁軸の下部を出入可能に配置すると共に、上記弁体保持部内で上記下部の端部と弁体の上面との間に所定のクリアランスを介して球状のボールを介装させたことを特徴とする請求項１記載の電動弁。   The valve body is provided with a tubular valve body holding portion, and the lower portion of the valve shaft is disposed in the valve body holding portion so as to be able to enter and exit, and the lower end portion and the upper surface of the valve body are disposed in the valve body holding portion. 2. The motor-operated valve according to claim 1, wherein a spherical ball is interposed between the two with a predetermined clearance. 弁体には筒状の弁体保持部を装着し、該弁体保持部内に弁軸の下部を出入可能に配置すると共に、上記弁体保持部内で上記下部の端部と弁体の上面に形成した球面部との間に所定のクリアランスを設けたことを特徴とする請求項１記載の電動弁。   The valve body is provided with a cylindrical valve body holding portion, and the lower portion of the valve shaft is disposed in the valve body holding portion so as to be able to enter and exit. The motor-operated valve according to claim 1, wherein a predetermined clearance is provided between the formed spherical portion. 上記弁軸の弁体保持部内の部分にバネ性を有する止め輪を付設し、該止め輪とボール又は球面部との間にバネを縮装させたことを特徴とする請求項２又は請求項３記載の電動弁。   A spring retaining ring is attached to a portion of the valve shaft in the valve body holding portion, and the spring is contracted between the retaining ring and the ball or the spherical surface portion. 3. The motor operated valve according to 3.
JP2004143275A 2004-05-13 2004-05-13 Motor operated valve Pending JP2005325888A (en)

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JP2005325888A5 JP2005325888A5 (en) 2007-06-28

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103249977A (en) * 2010-10-15 2013-08-14 浙江三花股份有限公司 Electric valve
JP2018119595A (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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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63133674U (en) * 1987-02-24 1988-09-01
JPH03187U (en) * 1989-05-23 1991-01-07
JP2000179731A (en) * 1998-12-15 2000-06-27 Saginomiya Seisakusho Inc Electrically driven valve
JP2000213660A (en) * 1999-01-22 2000-08-02 Samsung Electronics Co Ltd Electronic expansion valve for refrigerating cycle
JP2000346225A (en) * 1999-03-26 2000-12-15 Saginomiya Seisakusho Inc Motor-operated valve
JP2003074730A (en) * 2001-09-03 2003-03-12 Saginomiya Seisakusho Inc Motor-operated valve
JP2003329157A (en) * 2002-05-15 2003-11-19 Saginomiya Seisakusho Inc Motor-driven valve
JP2004093022A (en) * 2002-08-30 2004-03-25 Fuji Koki Corp Electric expansion valve

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63133674U (en) * 1987-02-24 1988-09-01
JPH03187U (en) * 1989-05-23 1991-01-07
JP2000179731A (en) * 1998-12-15 2000-06-27 Saginomiya Seisakusho Inc Electrically driven valve
JP2000213660A (en) * 1999-01-22 2000-08-02 Samsung Electronics Co Ltd Electronic expansion valve for refrigerating cycle
JP2000346225A (en) * 1999-03-26 2000-12-15 Saginomiya Seisakusho Inc Motor-operated valve
JP2003074730A (en) * 2001-09-03 2003-03-12 Saginomiya Seisakusho Inc Motor-operated valve
JP2003329157A (en) * 2002-05-15 2003-11-19 Saginomiya Seisakusho Inc Motor-driven valve
JP2004093022A (en) * 2002-08-30 2004-03-25 Fuji Koki Corp Electric expansion valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103249977A (en) * 2010-10-15 2013-08-14 浙江三花股份有限公司 Electric valve
JP2018119595A (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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