JPH1130354A - Electric operated valve - Google Patents
Electric operated valveInfo
- Publication number
- JPH1130354A JPH1130354A JP18870497A JP18870497A JPH1130354A JP H1130354 A JPH1130354 A JP H1130354A JP 18870497 A JP18870497 A JP 18870497A JP 18870497 A JP18870497 A JP 18870497A JP H1130354 A JPH1130354 A JP H1130354A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- valve stem
- stem
- motor
- spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Lift Valve (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えば倉庫全体を
冷凍庫とするような大型の冷凍機等の冷凍サイクルに膨
張弁として組み込まれて使用されるのに好適な電動弁に
係り、特に、大量の流体（冷媒）の流れを確実に制御す
るために強いバネを使用してもスムーズにロータを回転
させることができるようにしたものに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor-operated valve suitable for being incorporated as an expansion valve in a refrigeration cycle of a large refrigerator or the like in which a whole warehouse is used as a freezer. The present invention relates to an apparatus that can smoothly rotate a rotor even if a strong spring is used to reliably control the flow of a fluid (refrigerant).
【０００２】[0002]
【従来の技術】この種の電動弁としては、図５にその要
部が示されている如くのものが考えられている。図示例
の電動弁１’は倉庫全体を冷凍庫とするような大型の冷
凍機等の冷凍サイクルに膨張弁として組み込まれて使用
されるもので、基本的には、ステッピングモータのロー
タ３９と、弁棒３０と、弁本体（図示せず）と、を具備
しており、前記弁棒３０を前記ステッピングモータによ
りねじ送りで昇降させて該弁棒３０により弁本体に形成
された弁開閉口を開閉する（開口面積を変化させる）こ
とにより流量を調整するようになっている。2. Description of the Related Art As this type of motor-operated valve, a valve whose main part is shown in FIG. 5 has been considered. The motor-operated valve 1 ′ in the illustrated example is used by being incorporated as an expansion valve in a refrigeration cycle of a large refrigerator or the like in which the entire warehouse is a freezer, and basically includes a rotor 39 of a stepping motor and a valve. A rod 30 and a valve body (not shown) are provided, and the valve rod 30 is moved up and down by screw feed by the stepping motor to open and close a valve opening formed in the valve body by the valve rod 30. The flow rate is adjusted by changing the opening area.
【０００３】以下、要部を詳しく述べると、前記弁棒３
０はその下部が弁棒ホルダ２８（固定）の内周に摺動可
能に嵌挿される。その上部はスリーブ４０の上部内周に
嵌装されてスリーブ４０と一体的に回転するバネ受け３
６と前記弁棒３０の上部に嵌合している止め輪３８によ
り抜け落ちないように止められている。前記弁棒３０
は、前記バネ受け３６と弁棒中途所定の位置に遊嵌され
ている座金３３との間に縮装されたバネ３２により常時
下方に付勢されている。前記スリーブ４０の内周には雌
ねじ部２９が形成され、前記弁棒ホルダ２８の外周に形
成された雄ねじ部２７が、螺合せしめられる。前記スリ
ーブ４０の上側にはスリーブ４０の上側への移動を規制
する開弁規制ピン４５、及び、下側にはスリーブ４０の
下側への移動を規制する閉弁規制ピン４６がそれぞれ設
けられている。前記スリーブ４０の外周にはロータ３９
が一体的に回転移動できるように嵌装されている。[0003] The main parts will be described in detail below.
The lower part 0 is slidably fitted into the inner periphery of the valve stem holder 28 (fixed). The upper part of the spring receiver 3 is fitted on the inner periphery of the upper part of the sleeve 40 and rotates integrally with the sleeve 40.
6 and a retaining ring 38 fitted on the upper part of the valve stem 30 so as not to fall off. The valve stem 30
Is constantly urged downward by the spring 32 compressed between the spring receiver 36 and the washer 33 loosely fitted at a predetermined position in the valve stem. A female screw portion 29 is formed on the inner periphery of the sleeve 40, and a male screw portion 27 formed on the outer periphery of the valve stem holder 28 is screwed together. On the upper side of the sleeve 40, a valve opening restricting pin 45 for restricting the upward movement of the sleeve 40, and on the lower side, a valve closing restricting pin 46 for restricting the downward movement of the sleeve 40 are provided. I have. A rotor 39 is provided around the outer periphery of the sleeve 40.
Are fitted so that they can be integrally rotated.
【０００４】このような構成の電動弁１’において、前
記ステッピングモータを一方向に回転（正転）させる
と、ロータ３９、スリーブ４０等が一体的に回転し、前
記雌ねじ部２９と雄ねじ部２７との螺合による送りによ
り前記弁棒３０が下降せしめられて弁が閉じられる。一
方、前記ステッピングモータを逆方向に回転させると、
前記弁棒３０が上昇して弁が開かれる。In the electric valve 1 'having such a structure, when the stepping motor is rotated in one direction (forward rotation), the rotor 39, the sleeve 40 and the like rotate integrally, and the female screw portion 29 and the male screw portion 27 are rotated. The valve stem 30 is lowered by screwing and the valve is closed. On the other hand, when the stepping motor is rotated in the opposite direction,
The valve stem 30 is raised to open the valve.
【０００５】[0005]
【発明が解決しようとする課題】ところで、前記した如
くの構成の電動弁１’を、例えば大量の冷媒を扱う冷凍
機に適用した場合、弁口径が大きくなり、冷媒の流れや
逆流に対して安定した閉弁を実現するためにはバネ荷重
を大きくする必要がある。そして、弁体が弁座に衝接し
ていて回転し難い状態の弁棒３０に対して、ロータ３９
及びスリーブ４０を回転させるためには、バネ受け３６
とバネ３２の間、バネ３２と座金３３の間又は座金３３
と弁棒３０の間のいずれかが滑らなければならない。し
かし、弁棒３０はバネ３２により下方に付勢されている
ので、バネ荷重を大きくすると、これらの滑りに係る回
転荷重が大きくなり、ステッピングモータがスムーズに
回転し難くなってしまう。When the motor-operated valve 1 'having the structure described above is applied to, for example, a refrigerator that handles a large amount of refrigerant, the valve diameter becomes large, and the flow of the refrigerant and the backflow are prevented. In order to realize stable valve closing, it is necessary to increase the spring load. Then, the valve rod 30 is in contact with the valve seat and is hardly rotated.
In order to rotate the sleeve 40 and the
Between the spring 32 and the spring 32 and between the spring 32 and the washer 33 or the washer 33
Either between the and the stem 30 must slip. However, since the valve stem 30 is urged downward by the spring 32, if the spring load is increased, the rotational load associated with these slips increases, making it difficult for the stepping motor to rotate smoothly.
【０００６】かかるバネ荷重が大きい時に生じる大きな
回転荷重を効果的に低減させる方策は未だ提案されてい
ない。本発明は、上記のような問題に鑑みてなされたも
ので、その目的とするところは、大きな弁口径であるた
めに弁棒３０を付勢するバネ荷重が大きい場合でも、回
転荷重を効果的に低減することができるようにされた電
動弁を提供することにある。[0006] There has not yet been proposed any means for effectively reducing the large rotational load generated when the spring load is large. The present invention has been made in view of the above-described problems, and has as its object to effectively reduce the rotational load even when the spring load for urging the valve rod 30 is large due to the large valve diameter. Another object of the present invention is to provide a motor-operated valve that can be reduced to a minimum.
【０００７】[0007]
【課題を解決するための手段】前記の目的を達成すべ
く、本発明に係る電動弁は、大型冷凍機の冷凍サイクル
に膨張弁として組み込むのに好適なもので、基本的に
は、軸方向に移動せしめられる弁棒と、この弁棒により
開閉される弁開閉口付きの弁室が設けられた弁本体と、
前記弁棒を閉弁方向に付勢するバネと、前記弁棒の端に
当接しこのバネとの間に介在する弁押さえと、を備え、
前記弁棒と前記弁押さえとの当接部位がその当接外径を
前記弁棒の外径よりも小さくしたことを特徴としてい
る。In order to achieve the above-mentioned object, a motor-operated valve according to the present invention is suitable for being incorporated as an expansion valve into a refrigeration cycle of a large-sized refrigerator. And a valve body provided with a valve chamber with a valve opening and closing opening and closing by the valve stem,
A spring that biases the valve stem in a valve closing direction, and a valve retainer that abuts on the end of the valve stem and is interposed between the spring and the spring,
The contact portion between the valve stem and the valve presser has an abutment outside diameter smaller than the outside diameter of the valve stem.
【０００８】そして、本発明の好ましい具体的な態様と
しては、前記当接部位を略点状とすることにより回転荷
重を特に低減することができる。また、前記当接部位を
円周状とすることにより、中央部を当接部位から除外
し、組み立てのために利用することができることから、
組み立てを容易としつつ回転荷重を低減することができ
る。[0008] In a preferred specific embodiment of the present invention, the rotational load can be particularly reduced by making the contact portion substantially dot-shaped. In addition, since the contact portion is formed in a circumferential shape, the central portion is excluded from the contact portion, and can be used for assembly.
Rotational load can be reduced while facilitating assembly.
【０００９】更に、前記弁押さえと前記弁棒との当接部
材を曲率半径の異なる凹凸球面部とすることで、点状の
当接部位を安定的に形成することができる。更にまた、
前記弁押さえと前記弁棒との当接部材を傾斜の異なる円
錐凹凸部とすることで、円周状の当接部位を安定的に形
成することができる。Further, by forming the contact member between the valve presser and the valve stem as a concave / convex spherical portion having a different radius of curvature, a point-like contact portion can be formed stably. Furthermore,
By making the contact member between the valve retainer and the valve stem a conical uneven portion having a different inclination, a circumferential contact portion can be formed stably.
【００１０】また、前記弁棒及び弁体の各々の端に、ド
ライバの差し込み溝を設けることで、弁棒を電動弁本体
に組み込んだ後で、弁棒に弁体を取り付ける時の操作性
を向上することができる。このような構成とされた本発
明の電動弁においては、弁棒と弁押さえとの当接部位の
外径が弁棒の外径よりも小さいために、弁棒を付勢する
バネ荷重が大きい場合でも回転荷重を効果的に低減する
ことができる。In addition, by providing a driver insertion groove at each end of the valve stem and the valve body, the operability when attaching the valve body to the valve stem after the valve stem is assembled into the motor-operated valve body. Can be improved. In the electric valve of the present invention having such a configuration, since the outer diameter of the contact portion between the valve stem and the valve presser is smaller than the outer diameter of the valve stem, the spring load for urging the valve stem is large. Even in this case, the rotational load can be effectively reduced.
【００１１】[0011]
【発明の実施の形態】以下、本発明の実施形態を図面を
参照しながら説明する。本実施形態を説明するにあたっ
て、従来例と同一機能を奏するものは同じ符号を付して
説明する。図１は本発明に係る電動弁１の一実施形態を
示している。図示実施形態の電動弁１は、大型の冷凍機
等の冷凍サイクルに膨張弁として組み込まれて使用され
るもので、基本的には、ステッピングモータ１０と、弁
本体２０と、弁棒３０とを具備しており、パルス制御可
能なステッピングモータ１０が回転駆動するとねじ送り
に伴って昇降する弁棒３０で前記弁本体２０に形成され
た弁開閉口２３を開閉（開口面積を変化させる）ことに
より流量を調整するようになっている。Embodiments of the present invention will be described below with reference to the drawings. In describing the present embodiment, components having the same functions as those of the conventional example will be denoted by the same reference numerals. FIG. 1 shows an embodiment of a motor-operated valve 1 according to the present invention. The motor-operated valve 1 of the illustrated embodiment is used by being incorporated as an expansion valve in a refrigerating cycle such as a large refrigerator or the like, and basically includes a stepping motor 10, a valve body 20, and a valve rod 30. The valve opening / closing opening 23 formed in the valve main body 20 is opened / closed (by changing the opening area) by a valve rod 30 which is provided and is driven up and down by screw feed when the pulse controllable stepping motor 10 is driven to rotate. The flow rate is adjusted.
【００１２】これを詳しく述べるに、前記ステッピング
モータ１０は、前記弁本体２０に下蓋１８を介して連結
された逆立有底円筒状のキャン１１の外周部に嵌装され
たステータヨーク１３と、ボビン１４と、このボビン１
４に巻装され、外部から通電される巻線１５と、前記ス
テータヨーク１３、ボビン１４及び巻線１５の外周を鋳
包むモータモールド１２と、前記キャン１１の内部に配
置され、後述するスリーブ４０に固定された筒状の永久
磁石よりなるロータ３９と、を備えて構成されている。More specifically, the stepping motor 10 includes a stator yoke 13 fitted on the outer periphery of an inverted bottomed cylindrical can 11 connected to the valve body 20 via a lower cover 18. , Bobbin 14 and this bobbin 1
4, a motor mold 12 for casting the outer circumferences of the stator yoke 13, the bobbin 14, and the winding 15; a sleeve 40 which is disposed inside the can 11; And a rotor 39 made of a cylindrical permanent magnet fixed to the rotor.
【００１３】なお前記モータモールド１２、ステータヨ
ーク１３、ボビン１４及び巻線１５は、キャン１１の外
周に一体的に嵌装され、それらは、モータモールド１２
にビス１６で取り付けられた押圧係止具１７の球冠状の
係止凸部１７ａを前記キャン１１の外周に例えば９０度
間隔で４箇所設けられた凹部１９のいずれかに嵌合させ
ることにより位置決め及び抜止めを行うようになってい
る。The motor mold 12, the stator yoke 13, the bobbin 14, and the winding 15 are integrally fitted on the outer periphery of the can 11, and these are mounted on the motor mold 12.
Positioning is performed by fitting a crown-shaped locking projection 17a of a pressing locking tool 17 attached to a screw 16 to one of four recesses 19 provided at, for example, 90-degree intervals on the outer periphery of the can 11. And stop the removal.
【００１４】前記弁本体２０は、減圧機構部となる弁室
２１を有し、この弁室２１の左側部に導管６４が接続さ
れる流体入出口２２が設けられ、その底面部に導管６５
が接続されるとともに、前記弁棒３０により開閉される
弁開閉口２３が形成された弁座２４を備えている。一
方、前記弁本体２０の弁室２１上方には、外周部に雄ね
じ部２７が形成され、内周に前記弁棒３０が摺動可能に
嵌挿された弁棒ホルダ２８が固定されている。The valve body 20 has a valve chamber 21 serving as a pressure reducing mechanism, and a fluid inlet / outlet 22 to which a conduit 64 is connected is provided on the left side of the valve chamber 21, and a conduit 65 is provided on a bottom surface thereof.
And a valve seat 24 in which a valve opening / closing port 23 opened / closed by the valve rod 30 is formed. On the other hand, above the valve chamber 21 of the valve body 20, a male screw portion 27 is formed on the outer periphery, and a valve stem holder 28 in which the valve stem 30 is slidably fitted is fixed on the inner periphery.
【００１５】前記弁棒ホルダ２８の雄ねじ部２７には、
筒状のスリーブ４０の内周に形成された雌ねじ部２９が
螺合せしめられている。前記弁棒３０の上部のスリーブ
４０のバネ収納空間４０ａ内には、弁押さえ３４、圧縮
コイルバネ３２、バネ受け３６が上方に向け順次配置さ
れ、該バネ受け３６は、前記スリーブ４０に圧入固定さ
れている。The male screw portion 27 of the valve stem holder 28 includes:
The female screw portion 29 formed on the inner periphery of the cylindrical sleeve 40 is screwed together. A valve holder 34, a compression coil spring 32, and a spring receiver 36 are sequentially arranged upward in the spring storage space 40a of the sleeve 40 above the valve rod 30, and the spring receiver 36 is press-fitted and fixed to the sleeve 40. ing.
【００１６】図２は、本実施形態に係る電動弁１の前記
弁棒３０と該弁棒３０を支持する支持部との詳細を示し
たものである。前記弁棒３０の下部端には、弁体３１が
螺合結合され、該弁体３１は、前記弁開閉口２３を閉じ
る比較的短い先細り逆円錐台状の円錐着座面部３１ａと
その下側に連なり比較的長い先細り円錐台状の円錐面部
３１ｂとで形成され、該円錐面部３１ｂの下端にドライ
バを差し込む溝３１ｃが刻設されている。FIG. 2 shows the details of the valve stem 30 of the motor-operated valve 1 according to the present embodiment and a supporting portion for supporting the valve stem 30. A valve element 31 is screwed to the lower end of the valve stem 30. The valve element 31 has a relatively short tapered inverted truncated conical seating surface portion 31a for closing the valve opening / closing port 23 and a lower portion thereof. A relatively long tapered frusto-conical conical surface portion 31b is formed, and a groove 31c into which a driver is inserted is formed at the lower end of the conical surface portion 31b.
【００１７】前記弁棒３０の上端部には、止め輪３８を
嵌合係止させるための係止環状溝３５が形成され、該係
止環状溝３５の上部には、上方に向けて外径を縮小する
当接部材としての円錐凸部３０ａが形成され、更に、該
円錐凸部３０ａの上端に縮径円柱部３０ｂが形成されて
いる。前記縮径円柱部３０ｂの上端にはドライバを差し
込む溝３０ｃが刻設されている。前記係止環状溝３５に
は、止め輪３８を嵌合させて、スリーブ４０の上部で止
め輪３８によりスリーブ４０から弁棒３０が抜け落ちな
いように止められている。At the upper end of the valve stem 30, there is formed a locking annular groove 35 for fitting and locking a retaining ring 38, and the upper part of the locking annular groove 35 has an outer diameter upward. A conical convex portion 30a as a contact member for reducing the diameter of the conical convex portion 30a is formed, and a reduced-diameter cylindrical portion 30b is formed on an upper end of the conical convex portion 30a. A groove 30c into which a driver is inserted is formed in the upper end of the reduced diameter cylindrical portion 30b. A retaining ring 38 is fitted into the retaining annular groove 35, and the valve stem 30 is stopped at the upper part of the sleeve 40 by the retaining ring 38 so as not to fall off the sleeve 40.
【００１８】前記弁押さえ３４は、下部に当接部材とし
ての円錐凹部３４ａを形成していると共に、上部周囲に
前記圧縮コイルバネ３２を係止する環状段部３４ｂを形
成し、中央部に前記弁棒３０の縮径円柱部３０ｂを嵌合
する嵌合孔３４ｃを形成している。The valve retainer 34 has a conical concave portion 34a as a contact member at a lower portion, an annular step portion 34b for locking the compression coil spring 32 around an upper portion, and the valve retainer 34 at a central portion. A fitting hole 34c for fitting the reduced diameter cylindrical portion 30b of the rod 30 is formed.
【００１９】前記弁棒３０の上端の縮径円柱部３０ｂが
前記弁押さえ３４の嵌合孔３４ｃに嵌合し、前記弁棒３
０の円錐凸部３０ａが前記弁押さえ３４の円錐凹部３４
ａに嵌合するようになっており、前記弁棒３０は、上端
を圧縮コイルバネ３２の力によって下方に押圧される弁
押さえ３４により常時下方に付勢されている。The reduced diameter cylindrical portion 30b at the upper end of the valve stem 30 is fitted into a fitting hole 34c of the valve retainer 34, and the valve stem 3
The conical concave portion 30a of the valve retainer 34
The valve rod 30 is constantly urged downward by a valve retainer 34 whose upper end is pressed downward by the force of a compression coil spring 32.
【００２０】前記円錐凸部３０ａと前記円錐凹部３４ａ
とは、その広がり角度が異なるように形成されている。
例えば、前記円錐凸部３０ａの広がり角度α＝１１０°
に対して、前記円錐凹部３４ａの広がり角度β＝１２０
°とし、α＜β、すなわち、円錐凸部３０ａの方の傾斜
を急にすることによって、両者の嵌合当接部位を、該円
錐部の上端の最小外径の円周部Ａとなるようにして、他
の円錐面が事実状当接しない状態とする。The conical convex portion 30a and the conical concave portion 34a
Are formed so that their spread angles are different.
For example, the spread angle α of the conical projection 30a is 110 °.
The spread angle β of the conical recess 34a is 120
° and α <β, that is, by steepening the inclination of the conical convex portion 30a, so that the fitting contact portion between the two becomes the circumferential portion A having the minimum outer diameter at the upper end of the conical portion. So that the other conical surfaces do not actually contact.
【００２１】また、上記キャン１１の上部内側にはスト
ッパ受け４８を設け、前記スリーブ４０の上端部に突出
量の調整ができるように螺装された開弁規制ピン４５が
衝接せしめられる全開ストッパ５５を該ストッパ受け４
８に設け、前記スリーブ４０の下端部に突出量の調整が
できるように螺装された閉弁規制ピン４６が衝接せしめ
られる閉弁ストッパ５６を前記弁本体２０上部に設け
る。A stopper receiver 48 is provided inside the upper portion of the can 11, and a valve-opening restricting pin 45 screwed to the upper end of the sleeve 40 so as to adjust the amount of protrusion is brought into contact with the stopper 40. 55 to the stopper receiver 4
8, a valve closing stopper 56 is provided at the upper part of the valve main body 20 so that a valve closing restricting pin 46 screwed to a lower end portion of the sleeve 40 so as to be able to adjust a protruding amount is brought into abutment.
【００２２】このような構成の電動弁１において、前記
巻線１５を一方向に通電励磁すると、ロータ３９、スリ
ーブ４０等が一体的に回転（モータが右回りに正転）、
前記雄ねじ部２７と雌ねじ部２９との螺合によるねじ送
りにより前記弁棒３０が下降せしめられてその円錐着座
面部３１ａが前記弁座２４に圧接着座し、前記弁開閉口
２３が閉じられる。In the motor-operated valve 1 having such a structure, when the winding 15 is energized in one direction, the rotor 39, the sleeve 40 and the like rotate integrally (the motor rotates clockwise forward).
The valve stem 30 is lowered by screw feed by screwing the male screw portion 27 and the female screw portion 29, and the conical seating surface portion 31a is pressure-bonded to the valve seat 24, and the valve opening / closing port 23 is closed.
【００２３】前記弁開閉口２３が閉じられた時点では、
前記閉弁規制ピン４６が閉弁ストッパ５６に未だ衝接し
ておらず、前記弁棒３０が前記弁開閉口２３を閉じたま
ま、前記スリーブ４０等は更に回転下降せしめられる。
このときの前記弁棒３０に対する前記スリーブ４０の下
降量は、前記バネ３２が圧縮されることにより吸収され
る。When the valve opening / closing port 23 is closed,
The valve 40 is further rotated down with the valve closing restricting pin 46 not yet in contact with the valve closing stopper 56 and the valve stem 30 closing the valve opening 23.
The lowering amount of the sleeve 40 with respect to the valve stem 30 at this time is absorbed by the compression of the spring 32.
【００２４】その後更に、前記スリーブ４０等が回転下
降せしめられると、前記閉弁規制ピン４６が閉弁ストッ
パ５６に衝接し、これにより、前記ロータ３９への通電
励磁が続行されても、前記ロータ３９、スリーブ４０等
の回転下降運動が強制的に停止せしめられる。一方、前
記巻線１５を逆方向に通電励磁すると、前記モータ１０
が逆転向に回転し、前記弁体３１の円錐着座面部３１ａ
が前記弁座２４から離れ、前記弁開閉口２３が開かれ
る。Thereafter, when the sleeve 40 and the like are further rotated down, the valve closing restricting pin 46 comes into contact with the valve closing stopper 56, so that even if the energization to the rotor 39 is continued, the rotor closing 39, the rotational lowering movement of the sleeve 40 and the like is forcibly stopped. On the other hand, when the winding 15 is energized in the reverse direction,
Rotates in the reverse direction, and the conical seating surface portion 31a of the valve body 31
Is separated from the valve seat 24, and the valve opening / closing port 23 is opened.
【００２５】ところで、前記した如くの構成の電動弁１
を、冷凍機の冷凍サイクルに膨張弁として組み込んだ場
合、弁棒３０と弁押さえ３４との当接部位を両者の円錐
部の上端の最小外径の円周部Ａとすることにより、弁棒
３０の外径よりも小さい外径の円周部Ａで、前記圧縮コ
イルバネ３２の荷重を受けることとなるので、弁棒３０
に対し弁押さえ３４が回転する時、前記外径の小さい円
周部Ａ部分で集中して両者を滑らせることができるため
に、前記ロータ３９を回転駆動するための回転トルクを
従来のものに比べて小さくすることができる。したがっ
て、回転トルクは効果的に低減し、ステッピングモータ
１０はスムーズに回転することになる。By the way, the motor-operated valve 1 having the configuration as described above
Is incorporated as an expansion valve into the refrigeration cycle of the refrigerator, the contact portion between the valve stem 30 and the valve retainer 34 is set to the circumferential portion A having the minimum outer diameter at the upper end of the conical portion of the both, thereby providing the valve stem. Since the load of the compression coil spring 32 is received at the circumferential portion A having an outer diameter smaller than the outer diameter of the valve stem 30,
On the other hand, when the valve presser 34 rotates, since the both can be slid in a concentrated manner at the circumferential portion A having the small outer diameter, the rotational torque for rotationally driving the rotor 39 is reduced to the conventional value. It can be smaller than that. Therefore, the rotation torque is effectively reduced, and the stepping motor 10 rotates smoothly.
【００２６】また、バネ３２受け及び弁押さえ３４の中
央部を空けて、弁棒３０の上端及び弁体３１の下端にド
ライバを差し込む溝３０ａ、３１ｃを設けたため、弁棒
３０を電動弁１の本体に組み込んだ後で、弁棒３０の下
端に弁体３１をねじ締結により取り付ける時に、弁棒３
０の上端と弁体３１の下端にドライバを差し込んで簡単
にねじを締結することができ、狭い所での組立て作業の
操作性を向上することができる。Further, since the springs 32 and the center of the valve holder 34 are opened, and the upper end of the valve stem 30 and the lower end of the valve element 31 are provided with grooves 30a and 31c for inserting a driver, the valve stem 30 is After assembling into the main body, when attaching the valve element 31 to the lower end of the valve stem 30 by screw fastening, the valve stem 3
The screw can be easily tightened by inserting a screwdriver into the upper end of the valve body 0 and the lower end of the valve body 31, and the operability of the assembling work in a narrow place can be improved.
【００２７】図４は、他の実施形態を示す図である。前
記実施形態では、弁押さえ３４及び弁棒３０の上部を円
錐部形状として、当接部位が前記円錐部の最小径部の円
周部としたが、図４に示される実施形態では、前記弁棒
３０の上端を球状凸部３０ｄとすると共に、前記弁押さ
え３４の下面の前記球状凸部３０ｄの当接部位部材を球
状凹部３４ｄとし、かつ、弁押さえ３４の球状凹部３４
ｄの曲率半径を弁棒３０の前記球状凸部の曲率半径より
大きくすることで、事実上、上端の１点で接触するよう
にしたものである。接触部位が点状であるので、ロータ
３９の回転のための回転トルクを一層低減することがで
きるとともに、接触部材の形状が球面であるので、点状
の接触部位を安定的に形成することができる。FIG. 4 is a diagram showing another embodiment. In the above-described embodiment, the upper portions of the valve presser 34 and the valve rod 30 are formed in a conical shape, and the contact portion is formed as a circumferential portion having a minimum diameter portion of the conical portion. However, in the embodiment shown in FIG. The upper end of the rod 30 is a spherical convex portion 30d, the contact member of the spherical convex portion 30d on the lower surface of the valve retainer 34 is a spherical concave portion 34d, and the spherical concave portion 34d of the valve retainer 34 is provided.
By making the radius of curvature of d larger than the radius of curvature of the spherical convex portion of the valve stem 30, it is possible to make contact at substantially one point at the upper end. Since the contact portion is point-shaped, the rotational torque for rotating the rotor 39 can be further reduced, and the point-shaped contact portion can be formed stably because the shape of the contact member is spherical. it can.
【００２８】なお、上述の実施形態では、電動弁１を冷
凍機の冷凍サイクルに組み込まれる膨張弁として使用し
た場合を説明したが、本発明の電動弁１は膨張弁として
だけではなく、他の弁として使用する場合にも同様に回
転荷重を低減することができる。In the above embodiment, the case where the motor-operated valve 1 is used as an expansion valve incorporated in a refrigeration cycle of a refrigerator has been described. Similarly, when used as a valve, the rotational load can be reduced.
【００２９】また、前記実施形態においては、スリーブ
４０がステッピングモータ１０によりねじ送りで昇降せ
しめられるようになっているが、それに限られる訳では
なく、他のモータ又は手動回転によりスリーブ４０を昇
降せしめるものも同様な作用効果が得られる。さらに、
弁押さえ３４、弁棒３０上部の寸法形状等も上記実施形
態のものに限られず、適宜変更してもよいこと勿論であ
る。Further, in the above embodiment, the sleeve 40 is moved up and down by screw feed by the stepping motor 10. However, the present invention is not limited to this, and the sleeve 40 is moved up and down by another motor or manual rotation. The same operation and effect can be obtained for the same. further,
The dimensions, shape, and the like of the valve retainer 34 and the upper portion of the valve rod 30 are not limited to those in the above-described embodiment, and may be changed as appropriate.
【００３０】[0030]
【発明の効果】以上の説明から理解されるように、本発
明の電動弁は、弁棒と弁押さえとの当接部位の外径が弁
棒の外径よりも小さくしたことで、弁棒と弁押さえとは
径の小さい所で集中して相互に滑ることになり、弁棒を
付勢するバネ荷重が大きい場合でも回転トルクを効果的
に低減することができる。As will be understood from the above description, the motor-operated valve of the present invention has a valve stem in which the outer diameter of the contact portion between the valve stem and the valve retainer is smaller than the outer diameter of the valve stem. And the valve presser are intensively slid with each other at a small diameter, so that the rotational torque can be effectively reduced even when the spring load for urging the valve stem is large.
【００３１】また、当接部位を点状とすることにより回
転荷重を特に低減することができるという利点が得ら
れ、さらに、弁棒及び弁体の端にドライバを差し込む溝
を設けることで、弁棒を電動弁本体に組み込んだ後で、
弁棒に弁体を取り付ける時の操作性を向上することがで
きる。Further, the point that the contact portion is point-shaped has an advantage that the rotational load can be particularly reduced. Further, by providing a groove for inserting a driver at the end of the valve rod and the valve body, the valve is provided. After assembling the rod into the motorized valve body,
Operability when attaching the valve element to the valve stem can be improved.
【図１】本発明に係る電動弁の一実施形態を示す断面
図。FIG. 1 is a sectional view showing an embodiment of a motor-operated valve according to the present invention.
【図２】図１に示される電動弁に備えられる弁体、弁
棒、弁押さえを示す拡大図。FIG. 2 is an enlarged view showing a valve body, a valve rod, and a valve press provided in the electric valve shown in FIG.
【図３】本発明に係る電動弁の他の実施形態の要部を示
す断面図。FIG. 3 is a cross-sectional view showing a main part of another embodiment of the motor-operated valve according to the present invention.
【図４】従来の電動弁の一例の要部を示す断面図。FIG. 4 is a cross-sectional view showing a main part of an example of a conventional electric valve.
１、１’…電動弁、１０…ステッピングモータ、１１…
キャン、１２…モータモールド、１３…ステータヨー
ク、１４…ボビン、１５…巻線、１６…ビス、１７…押
圧係止具、１７ａ…係止凸部、１８…下蓋、１９…凹
部、２０…弁本体、２１…弁室、２２…流体入出口、２
３…弁開閉口、２７…雄ねじ部、２８…弁棒ホルダ、２
９…雌ねじ部、３０…弁棒、３０ａ…円錐凸部、３１…
弁体、３１ａ…円錐着座面部、３１ｂ…円錐面部、３１
ｃ…溝、３２…バネ、３３…座金、３４…弁押さえ、３
４ａ…円錐凹部、３５…窪み、３６…バネ受け、３７…
凸円錐面、３８…止め輪、３９…ロータ、４０…スリー
ブ、４５…開弁規制ピン、４６…閉弁規制ピン、４８…
ストッパ受け、５５…全開ストッパ、５６…閉弁ストッ
パ、６４、６５…導管1, 1 '... electric valve, 10 ... stepping motor, 11 ...
Can, 12: Motor mold, 13: Stator yoke, 14: Bobbin, 15: Winding, 16: Screw, 17: Pressing / locking tool, 17a: Locking projection, 18: Lower lid, 19: Depression, 20 ... Valve body, 21: Valve chamber, 22: Fluid inlet / outlet, 2
3 ... valve opening / closing opening, 27 ... male screw part, 28 ... valve stem holder, 2
9 Female thread portion, 30 Valve stem, 30a Conical convex portion, 31
Valve element, 31a: conical seating surface part, 31b: conical surface part, 31
c: groove, 32: spring, 33: washer, 34: valve retainer, 3
4a: conical recess, 35: recess, 36: spring receiver, 37:
Convex conical surface, 38: retaining ring, 39: rotor, 40: sleeve, 45: valve opening regulating pin, 46: valve closing regulating pin, 48 ...
Stopper receiver, 55: Fully open stopper, 56: Valve closing stopper, 64, 65: Conduit
Claims (8)
弁棒により開閉される弁開閉口付きの弁室が設けられた
弁本体と、前記弁棒を閉弁方向に付勢するバネと、前記
弁棒の端に当接し前記バネとの間に介在する弁押さえ
と、を備えた電動弁において、 前記弁棒と前記弁押さえとの各当接部材の当接部位は、
その当接外径を前記弁棒の外径よりも小さくしたことを
特徴とする電動弁。1. A valve stem having an axially movable valve stem, a valve body provided with a valve chamber having a valve opening and closing opening and closing by the valve stem, and a spring for urging the valve stem in a valve closing direction. , A valve retainer abutting on the end of the valve stem and interposed between the spring and the spring, the contact portion of each contact member between the valve stem and the valve retainer,
An electric valve characterized in that the contact outer diameter is smaller than the outer diameter of the valve stem.
徴とする請求項１に記載の電動弁。2. The motor-operated valve according to claim 1, wherein the contact portion is substantially point-shaped.
徴とする請求項１に記載の電動弁。3. The motor-operated valve according to claim 1, wherein the contact portion has a circular shape.
し、前記弁棒の当接部位部材を前記球状凹部の曲率半径
より小さい球状凸部としたことを特徴とする請求項２に
記載の電動弁。4. The valve member according to claim 2, wherein the contact member of the valve press is a spherical concave portion, and the contact portion member of the valve stem is a spherical convex portion smaller than a radius of curvature of the spherical concave portion. Electric valve.
かな円錐凹部とし、前記弁棒の当接部材を傾斜の急な円
錐凸部としたことを特徴とする請求項３に記載の電動
弁。5. The electric motor according to claim 3, wherein the contact member of the valve press is a conical concave portion having a gentle inclination, and the contact member of the valve stem is a conical convex portion having a steep inclination. valve.
を設けたことを特徴とする請求項１、３又は５に記載の
電動弁。6. The motor-operated valve according to claim 1, wherein an insertion groove for a driver is provided at an upper end of the valve stem.
開閉口を開閉する弁体の先端にドライバの差し込み溝を
設けたことを特徴とする請求項６に記載の電動弁。7. The motor-operated valve according to claim 6, wherein an insertion groove for a driver is provided at an end of a valve body that is screwed to a lower end of the valve stem and opens and closes the valve opening and closing port.
下部に環状溝を形成し、該環状溝に止め輪を嵌合係止し
たことを特徴とする請求項１乃至７のいずれか一項に記
載の電動弁。8. The valve stem according to claim 1, wherein an annular groove is formed in a lower portion of the contact member of the valve retainer, and a retaining ring is fitted and locked in the annular groove. The motor-operated valve according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18870497A JPH1130354A (en) | 1997-07-14 | 1997-07-14 | Electric operated valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18870497A JPH1130354A (en) | 1997-07-14 | 1997-07-14 | Electric operated valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1130354A true JPH1130354A (en) | 1999-02-02 |
Family
ID=16228356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18870497A Pending JPH1130354A (en) | 1997-07-14 | 1997-07-14 | Electric operated valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1130354A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008261502A (en) * | 2008-07-18 | 2008-10-30 | Kawasaki Precision Machinery Ltd | Seat block and valve device |
| JP2010138941A (en) * | 2008-12-09 | 2010-06-24 | Aisin Seiki Co Ltd | Motor mounted valve |
| JP2016151284A (en) * | 2015-02-16 | 2016-08-22 | 株式会社テージーケー | Motor valve |
| CN108426042A (en) * | 2018-05-14 | 2018-08-21 | 浙江中宝自控元件有限公司 | A kind of motor-driven valve |
| CN110566712A (en) * | 2019-09-29 | 2019-12-13 | 鞍山电磁阀有限责任公司 | Self-holding type electromagnetic valve |
| CN114458773A (en) * | 2020-10-21 | 2022-05-10 | 盾安环境技术有限公司 | Electronic expansion valve |
| CN114838185A (en) * | 2021-02-01 | 2022-08-02 | 浙江三花智能控制股份有限公司 | Electric valve |
-
1997
- 1997-07-14 JP JP18870497A patent/JPH1130354A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008261502A (en) * | 2008-07-18 | 2008-10-30 | Kawasaki Precision Machinery Ltd | Seat block and valve device |
| JP2010138941A (en) * | 2008-12-09 | 2010-06-24 | Aisin Seiki Co Ltd | Motor mounted valve |
| JP2016151284A (en) * | 2015-02-16 | 2016-08-22 | 株式会社テージーケー | Motor valve |
| CN108426042A (en) * | 2018-05-14 | 2018-08-21 | 浙江中宝自控元件有限公司 | A kind of motor-driven valve |
| CN108426042B (en) * | 2018-05-14 | 2023-05-16 | 浙江中宝自控元件有限公司 | Electric valve |
| CN110566712A (en) * | 2019-09-29 | 2019-12-13 | 鞍山电磁阀有限责任公司 | Self-holding type electromagnetic valve |
| CN114458773A (en) * | 2020-10-21 | 2022-05-10 | 盾安环境技术有限公司 | Electronic expansion valve |
| CN114458773B (en) * | 2020-10-21 | 2024-03-29 | 盾安环境技术有限公司 | Electronic expansion valve |
| CN114838185A (en) * | 2021-02-01 | 2022-08-02 | 浙江三花智能控制股份有限公司 | Electric valve |
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