JPH1122846A - Motor operated valve - Google Patents
Motor operated valveInfo
- Publication number
- JPH1122846A JPH1122846A JP17871397A JP17871397A JPH1122846A JP H1122846 A JPH1122846 A JP H1122846A JP 17871397 A JP17871397 A JP 17871397A JP 17871397 A JP17871397 A JP 17871397A JP H1122846 A JPH1122846 A JP H1122846A
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- motor
- flat plate
- operated valve
- valve
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えばヒートポン
プ式エアコンや冷凍機等を構成する冷凍サイクルに組み
込まれて使用される電動弁に係り、特に、ステッピング
モータのキャン部分と該キャンを弁本体に連結する蓋状
部材とを改善した電動弁に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor-operated valve incorporated in a refrigeration cycle constituting, for example, a heat pump air conditioner or a refrigerator, and more particularly to a can portion of a stepping motor and the can mounted on a valve body. The present invention relates to a motor-operated valve having an improved lid-like member to be connected.
【０００２】[0002]
【従来の技術】従来のこの種の電動弁としては、図４に
示されるものが提案されている。図示例の電動弁１'
は、基本的には、ステッピングモータ１０と、弁本体２
０と、ロータ軸３５及び弁軸３０とを具備しており、前
記ロータ軸３５を前記ステッピングモータ１０により回
転駆動してねじ送りにより昇降させ、それに伴って昇降
する弁軸３０の弁体３１で前記弁本体２０に形成された
流体入出口（弁座）２３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 FIG. 4 shows a conventional motor-operated valve of this type. Motorized valve 1 'in the illustrated example
Is basically a stepping motor 10 and a valve body 2
0, a rotor shaft 35, and a valve shaft 30. The rotor shaft 35 is driven to rotate by the stepping motor 10 to be moved up and down by screw feed. The flow rate is adjusted by opening and closing (changing the opening area) a fluid inlet / outlet (valve seat) 23 formed in the valve body 20.
【０００３】前記ステッピングモータ１０は、前記弁本
体２０に蓋状部材１８を介して連結固定された円筒状の
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１４に巻装され、外部か
ら通電されるマグネットワイヤ１５と、スリーブ４０に
固定されたボンド磁石よりなるロータ３９と、を備えて
構成されている。[0003] The stepping motor 10 comprises a stator yoke 13 fitted on the outer periphery of a cylindrical can 11 fixedly connected to the valve body 20 via a lid 18.
, A bobbin 14, a magnet wire 15 wound around the bobbin 14 and energized from the outside, and a rotor 39 made of a bonded magnet fixed to a sleeve 40.
【０００４】前記弁本体２０は、弁室２１を有し、この
弁室２１に連通する導管２４が接続される流体入出口２
２が設けられ、その底面部に導管２５が接続されるとと
もに、前記弁軸３０により開閉される前記流体入出口２
３が形成されている。前記弁本体２０の弁室２１上方に
は、内周部に雌ねじ部が形成されたガイドブッシュ２６
が内嵌固定されている。The valve body 20 has a valve chamber 21 and a fluid inlet / outlet 2 to which a conduit 24 communicating with the valve chamber 21 is connected.
2, a conduit 25 is connected to the bottom surface thereof, and the fluid inlet / outlet 2 is opened / closed by the valve shaft 30.
3 are formed. Above the valve chamber 21 of the valve body 20, a guide bush 26 having a female screw portion formed on the inner periphery.
Are fixed inside.
【０００５】前記キャン１１、前記蓋状部材１８、及
び、前記弁本体２０との組立密封固定は、まず、前記弁
本体２０の上部環状突出片２０ａに前記蓋状部材１８を
嵌合し、前記上部環状突出片２０ａを外周方向にかしめ
ると共に、前記弁本体２０の外周上部２０ｂと前記蓋状
部材１８の下面とをロー付け溶接Ａを行う。その後、前
記キャン１１と前記蓋状部材１８内に前記ガイドブッシ
ュ２６、ロータ３９、スリーブ４０、弁軸３０、ロータ
軸３５等を収納した後、前記蓋状部材１８の上部鍔部１
８ａと前記キャン１１の下部鍔部１１ａとを当接させ
て、その周囲をＴｉＧ溶接（タングステンイナートガス
溶接）等で拝み溶接Ｂを行い、これによって、前記キャ
ン１１内を密封状態としている。In order to assemble and fix the can 11, the lid 18, and the valve body 20, first, the lid 18 is fitted to an upper annular projecting piece 20 a of the valve body 20. The upper annular projecting piece 20a is crimped in the outer peripheral direction, and the outer peripheral upper part 20b of the valve body 20 and the lower surface of the lid-like member 18 are brazed and welded. Then, after the guide bush 26, the rotor 39, the sleeve 40, the valve shaft 30, the rotor shaft 35, and the like are stored in the can 11 and the lid member 18, the upper flange 1 of the lid member 18 is formed.
8a and the lower flange portion 11a of the can 11 are brought into contact with each other, and the periphery of the can is welded by TiG welding (tungsten inert gas welding) or the like, whereby the inside of the can 11 is sealed.
【０００６】このような構成の電動弁１’においては、
前記マグネットワイヤ１５を一方向に通電励磁すると、
ロータ３９、スリーブ４０、ロータ軸３５、ホルダ２８
等が一体的に回転し、前記雌ねじ部と雄ねじ部との螺合
によるねじ送りにより前記弁軸３０が下降せしめられて
前記流体入出口２３を閉方向に調整する。また、前記マ
グネットワイヤ１５を他方向に通電励磁すると、前記弁
軸３０が上昇して前記流体入出口２３を開方向に調整す
る。In the electric valve 1 'having such a structure,
When the magnet wire 15 is energized and excited in one direction,
Rotor 39, sleeve 40, rotor shaft 35, holder 28
The valve shaft 30 is lowered by screw feed by screwing the female screw portion and the male screw portion, and the fluid inlet / outlet 23 is adjusted in the closing direction. Further, when the magnet wire 15 is energized in the other direction, the valve shaft 30 is raised to adjust the fluid inlet / outlet 23 in the opening direction.
【０００７】[0007]
【発明が解決しようとする課題】そして、前記電動弁
１’は、冷凍サイクルに組み込まれて使用される稼働時
には、前記キャン１１内にも冷媒が供給されるので、該
キャン１１内は前記冷媒によって圧力状態に置かれてい
る。このため、前記キャン１１と前記蓋状部材１８との
ＴｉＧ溶接等の拝み溶接部Ｂ、及び、前記弁本体２０の
外周部２０ｂと前記蓋状部材１８の下面とのロー付け溶
接部Ａは、その電動弁１’の前記冷媒の圧力負荷状態で
の長期の使用に耐えるものでなければならない。When the motor-operated valve 1 'is operated while being incorporated in a refrigeration cycle, the refrigerant is also supplied to the can 11 so that the refrigerant in the can 11 is filled with the refrigerant. Is placed in a pressure state. For this reason, a bead welding portion B such as TiG welding between the can 11 and the lid member 18 and a brazing weld portion A between the outer peripheral portion 20b of the valve body 20 and the lower surface of the lid member 18 are: The motor-operated valve 1 'must be able to withstand long-term use under the pressure load of the refrigerant.
【０００８】また、近年、フロンガス等によるオゾン層
の破壊等の環境上の問題から旧来から使用されている冷
媒Ｒ−２２が、フロン規制の対象となったことからその
代替冷媒として例えば冷媒Ｒ４１０Ａが採用されてきて
いる。この代替冷媒Ｒ４１０Ａは、前記冷凍サイクル等
で使用する場合には、前記旧来からの冷媒Ｒ−２２に比
べて、高圧状態（概ね１．４〜１．５倍程度）で作動す
ることになる。このため、前記電動弁１’の稼働中は、
前記キャン１１内も代替冷媒Ｒ４１０Ａの使用によっ
て、従来の冷媒Ｒ−２２に比べて高圧状態となり、前記
旧来からの冷媒Ｒ−２２ではその強度に問題がなかった
前記溶接部Ｂ及びロー付け溶接部Ａにおいても、前記高
圧状態に耐える構造のものでなければならなくなった。Further, in recent years, refrigerant R-22 which has been used for a long time due to environmental problems such as destruction of the ozone layer due to chlorofluorocarbon gas has been subject to chlorofluorocarbon regulation. Has been adopted. When the alternative refrigerant R410A is used in the refrigeration cycle or the like, it operates in a high pressure state (about 1.4 to 1.5 times) as compared with the conventional refrigerant R-22. Therefore, during the operation of the electric valve 1 ′,
The use of the alternative refrigerant R410A also causes the inside of the can 11 to be in a higher pressure state than the conventional refrigerant R-22, and the conventional refrigerant R-22 has no problem in its strength. Also in A, the structure must be able to withstand the high pressure state.
【０００９】ところで、本発明者等の実験によれば、従
来の電動弁１’の前記キャン１１と前記蓋状部材１８と
のＴｉＧ溶接等の拝み接合溶接部Ｂは、図５に示したよ
うに、前記新冷媒Ｒ４１０Ａの内圧によって、前記キャ
ン１１と前記蓋状部材１８との各々は、反対方向の作用
力Ｆもしくは作用力Ｆ’を受けることとなり、前記蓋状
部材１８の上部鍔部１８ａと前記キャン１１の下部鍔部
１１ａとを前記拝み接合溶接部Ｂ部分の作用点Ｅを中心
として互いに離す方向に作用し、前記拝み接合溶接部Ｂ
に分離作用を生じさせることとなる。According to experiments conducted by the present inventors, the conventional joint 1 B of the conventional motor-operated valve 1 ′, such as TiG welding between the can 11 and the lid 18, is shown in FIG. Meanwhile, due to the internal pressure of the new refrigerant R410A, each of the can 11 and the lid-shaped member 18 receives an acting force F or an acting force F ′ in the opposite direction, and the upper flange portion 18a of the lid-shaped member 18 And the lower flange 11a of the can 11 act in a direction to separate them from each other about the point of action E of the part of the joint B.
Causes a separating action.
【００１０】前記キャン１１内の冷媒は、その稼働中、
その圧力を交番して変化するものであるので、前記作用
力Ｆ及び作用力Ｆ’がその強さを繰り返して交番的に変
化することとなる。このことは、前記拝み接合溶接部Ｂ
の作用点Ｅに繰り返し応力が作用することを意味し、や
がて、該繰り返し応力によって前記拝み接合溶接部Ｂの
溶接ビート（作用点Ｅ）が疲労して該溶接ビート内に亀
裂Ｇが発生する問題が生ずるおそれがある。更に、該亀
裂Ｇは、前記繰り返し応力の作用によって成長して、前
記電動弁１’の動作に不具合が生じるおそれがある。During operation, the refrigerant in the can 11
Since the pressure is changed alternately, the acting force F and the acting force F ′ are alternately changed by repeating the strength. This is due to the fact that the joint B
Means that a repetitive stress is applied to the application point E, and the repetitive stress eventually fatigues the welding beat (working point E) of the welted joint welded portion B to cause a crack G in the welding beat. May occur. Further, the crack G may grow due to the action of the repetitive stress, causing a malfunction in the operation of the electric valve 1 ′.
【００１１】本発明は、前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、従来の電動弁に
大きな改造を施さずに、冷媒の内部圧力に基づくキャ
ン、蓋状部材、及び、前記弁本体の接合密封部分の亀裂
あるいはその成長を防止する電動弁を提供することにあ
る。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to provide a can, lid-like member based on the internal pressure of a refrigerant without making large modifications to a conventional electric valve. Another object of the present invention is to provide a motor-operated valve that prevents cracks or growth of a joint-sealed portion of the valve body.
【００１２】[0012]
【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、基本的には、弁本体と、有
底筒状のキャンと、該キャンと溶接結合されて前記弁本
体に取付固定される蓋状部材とを備え、前記蓋状部材
が、環状平板部材とされ、該環状平板部材の外周部に前
記キャンの筒状開口部を係合し、該係合部を溶接により
接合したことを特徴とし、前記キャンは、底部が球状面
に形成されていると共に、前記開口部が拡大されてい
て、一体絞り成形加工され、前記環状平板の外周上部に
は段差形状部を形成し、該段差形状部に前記キャンの筒
状開口部を係合したことを特徴としている。In order to achieve the above object, a motor-operated valve according to the present invention basically comprises a valve body, a bottomed cylindrical can, and a welded connection with the can. A lid-like member attached to and fixed to the valve body, wherein the lid-like member is an annular flat plate member, and a cylindrical opening of the can is engaged with an outer peripheral portion of the annular flat plate member; The can is characterized in that the can has a spherical bottom at the bottom and the opening is enlarged, and is formed by integral drawing. And a cylindrical opening of the can is engaged with the step-shaped portion.
【００１３】また、本発明の電動弁の好ましい具体的な
態様は、前記溶接接合が、ＴｉＧ溶接であり、前記環状
平板部材の外周下部に段差形状部を形成し、前記平板部
材が、前記弁本体の上部環状突出片と係合して、該上部
環状突出片で前記蓋状部材をかしめ固定すると共に、前
記平板部材の下面と前記弁本体の上部周部をロー付溶接
接合したことを特徴としている。In a preferred specific embodiment of the motor-operated valve according to the present invention, the welding connection is TiG welding, a step-shaped portion is formed at a lower portion of the outer periphery of the annular flat plate member, and the flat plate member is provided with the valve. The upper annular projecting piece engages with the upper annular projecting piece to caulk and fix the lid-like member, and the lower surface of the flat plate member and the upper peripheral portion of the valve body are welded to each other by brazing. And
【００１４】このような構成とされた本発明に係る電動
弁においては、キャンと平板部材との接合溶接部を、該
平板部材の外周に形成した上部段差形状部に前記キャン
の開口部の端部を係合する構造として、その周囲を溶接
するべく構成したので、従来の冷媒に比べて高圧の代替
冷媒Ｒ４１０Ａが前記キャン内に供給されても、前記キ
ャンは、前記代替冷媒Ｒ４１０Ａの径方向の圧力に対し
ては、筒状の開口部で受けることとなり、かつ、前記キ
ャンの長手方向（上方）の前記冷媒Ｒ４１０Ａの圧力に
対しては、前記溶接部の引っ張り力として受けるので、
該接合部が、キャン内の従来の冷媒に比べて高い圧力の
冷媒Ｒ４１０Ａによって、その稼働中、繰り返し応力の
作用を受けたとしても、該繰り返し応力によって亀裂が
発生するようなことはない。また、前記平板部材の周部
の下部に段差形状部を形成したことにより、溶接位置の
バラツキをなくして、溶接強度の強い溶接部を得ること
ができる。In the motor-operated valve according to the present invention having the above-described structure, the joint welding portion between the can and the flat plate member is formed at the upper stepped portion formed on the outer periphery of the flat plate member with the end of the opening of the can. As the structure for engaging the parts, the periphery thereof is welded, so that even if the alternative refrigerant R410A having a higher pressure than the conventional refrigerant is supplied into the can, the can is kept in the radial direction of the alternative refrigerant R410A. Is received at the cylindrical opening, and the pressure of the refrigerant R410A in the longitudinal direction (upper) of the can is received as the tensile force of the welded portion.
Even if the joint is subjected to the action of repeated stress during its operation by the refrigerant R410A having a higher pressure than the conventional refrigerant in the can, no crack is generated by the repeated stress. Further, by forming the step-shaped portion at the lower portion of the peripheral portion of the flat plate member, it is possible to eliminate a variation in the welding position and obtain a welded portion having a high welding strength.
【００１５】[0015]
【発明の実施の形態】以下、本発明の電動弁の一実施形
態を添付図面を参照しながら詳細に説明する。該実施形
態を説明するに当たって、前記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。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a motor-operated valve according to the present invention will be described in detail with reference to the accompanying drawings. In describing the embodiment, components having the same functions as those of the conventional example will be denoted by the same reference numerals.
【００１６】図１は、本実施形態の電動弁１の縦断面図
である。該図１に示す電動弁１は、基本的には、ステッ
ピングモータ１０と、弁本体２０と、ロータ軸３５及び
弁軸３０とを具備しており、前記ロータ軸３５を前記ス
テッピングモータ１０により回転駆動してねじ送りによ
り昇降させ、それに伴って昇降する弁軸３０で前記弁本
体２０に形成された流体入出口（弁座）２３を弁体３１
で開閉する（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。FIG. 1 is a longitudinal sectional view of a motor-operated valve 1 according to the present embodiment. The motor-operated valve 1 shown in FIG. 1 basically includes a stepping motor 10, a valve body 20, a rotor shaft 35 and a valve shaft 30, and the rotor shaft 35 is rotated by the stepping motor 10. The fluid inlet / outlet (valve seat) 23 formed in the valve body 20 is moved by a valve shaft 30 which is driven to be moved up and down by screw feed, and which is moved up and down accordingly.
The flow rate is adjusted by opening and closing (changing the opening area) with.
【００１７】前記ステッピングモータ１０は、前記弁本
体２０に蓋状部材３３を介して連結固定された円筒状の
キャン３２の外周部に嵌装されたステータヨーク１３
と、ボビン１４と、該ボビン１４に巻装され、外部から
通電されるマグネットワイヤ１５と、前記ステータヨー
ク１３、ボビン１４及びマグネットワイヤ１５の外周を
封止するモールド１２と、前記キャン３２の内部に配置
され、後述するスリーブ４０に固定されたボンド磁石よ
りなるロータ３９と、を備えて構成されている。The stepping motor 10 comprises a stator yoke 13 fitted on the outer periphery of a cylindrical can 32 fixedly connected to the valve body 20 via a lid member 33.
, A bobbin 14, a magnet wire 15 wound around the bobbin 14, and energized from the outside, a mold 12 for sealing the outer periphery of the stator yoke 13, the bobbin 14 and the magnet wire 15, and an inside of the can 32. And a rotor 39 composed of a bonded magnet fixed to a sleeve 40 described later.
【００１８】前記モールド１２、ステータヨーク１３、
ボビン２４、及びマグネットワイヤ１５は、キャン３２
の外周に一体的に嵌装され、それらはモールド１２にビ
ス１６で取り付けられた押圧係止具１７の係止凸部１７
ａを前記キャン３２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行うようになっている。The mold 12, the stator yoke 13,
The bobbin 24 and the magnet wire 15 are
Are integrally fitted on the outer periphery of the locking projection 17 of the pressing locking tool 17 attached to the mold 12 with screws 16.
a is fitted to the outer periphery of the can 32 in any one of four recesses 19 provided at, for example, 90-degree intervals, thereby positioning and preventing the removal.
【００１９】前記弁本体２０は、弁室２１を有し、該弁
室２１に連通する導管２４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２５が接続されるととも
に、前記弁軸３０の弁体３１により開閉される流体入出
口（弁座）２３が形成されている。前記弁本体２０の弁
室２１の上方には、内周部に雌ねじ部２７が形成された
ガイドブッシュ２６が、内嵌固定されている。The valve body 20 has a valve chamber 21 and a fluid inlet / outlet 22 to which a conduit 24 communicating with the valve chamber 21 is connected.
A fluid inlet / outlet (valve seat) 23 which is opened and closed by a valve body 31 of the valve shaft 30 is formed. Above the valve chamber 21 of the valve body 20, a guide bush 26 having an internal thread 27 formed on the inner periphery is fixedly fitted.
【００２０】前記ガイドブッシュ２６の雌ねじ部２７に
は、ホルダ２８の外周に形成された雄ねじ部２９が螺合
せしめられ、該ホルダ２８の内周下部にフランジ付きの
弁軸３０が摺動可能に嵌挿され、また、前記ホルダ２８
の下部には、前記弁軸３０のフランジ３０ａを受けるカ
ラー３４が圧入固定されていて、前記弁軸３０は、前記
ホルダ２８内に縮装されたコイルスプリング３７により
常時下方に付勢されている。前記ホルダ２８の上部に
は、ロータ軸３５がそれと一体的に回転移動できるよう
に内嵌固定されており、前記ホルダ２８の上部外周に
は、凸状の可動側ストッパ４５が、下向きに突設された
合成樹脂製のスリーブ４０と一体的に回転移動できるよ
うに成形固定されている。A male screw portion 29 formed on the outer periphery of the holder 28 is screwed into the female screw portion 27 of the guide bush 26, and a valve shaft 30 with a flange is slidable on the lower inner peripheral portion of the holder 28. The holder 28 is inserted
A collar 34 for receiving the flange 30a of the valve shaft 30 is press-fitted and fixed at a lower portion of the valve shaft 30. The valve shaft 30 is constantly urged downward by a coil spring 37 compressed in the holder 28. . A rotor shaft 35 is fixedly fitted on the upper portion of the holder 28 so that the rotor shaft 35 can rotate integrally therewith. A movable stopper 45 having a convex shape is provided on the outer periphery of the upper portion of the holder 28 so as to project downward. It is molded and fixed so that it can rotate integrally with the sleeve 40 made of synthetic resin.
【００２１】また、前記ロータ軸３５の上部には、コイ
ルスプリング３６が装填されている。このコイルスプリ
ング３６は、ロータ３９が回転（逆転）せしめられてロ
ータ軸３５やスリーブ４０等が前記雌ねじ部２７と雄ね
じ部２９との螺合によるねじ送りにより上昇せしめられ
て、前記ねじ部２７，２９の螺合が外れたとき、前記ホ
ルダ２８をガイドブッシュ２６側に押圧して再螺合し易
くするためのものである。A coil spring 36 is mounted above the rotor shaft 35. In the coil spring 36, the rotor 39 is rotated (reversely rotated), and the rotor shaft 35, the sleeve 40, and the like are raised by screwing by screwing the female screw portion 27 and the male screw portion 29. When the screw 29 is disengaged, the holder 28 is pressed toward the guide bush 26 to facilitate re-screw.
【００２２】前記ガイドブッシュ２６の上部外周には、
前記可動側ストッパ４５が衝接せしめられる凸状の固定
側ストッパ５５が上向きに突設された合成樹脂製の固定
受け座５０が成形固定されている。On the outer periphery of the upper part of the guide bush 26,
A fixed receiving seat 50 made of synthetic resin and having a convex fixed-side stopper 55 to which the movable-side stopper 45 is brought into abutting contact is formed and fixed.
【００２３】前記キャン３２は、一端に開口部３２ａを
備えた有底筒状形状をしており、底部３２ｂが楕円球面
状に形成されると共に、前記開口部３２ａが拡大径とさ
れ、一体絞り加工で成形されている。また、前記蓋状部
材３３は、図２（ａ）に示すように、環状平板部材とし
て形成され、内部に前記弁本体２０の上部環状突出片２
０ａに嵌合する内部孔３３ａを有すると共に、その外周
部に上部の段差形状部３３ｂと下部の段差形状部３３ｃ
とを有している。The can 32 has a cylindrical shape with a bottom and an opening 32a at one end. The bottom 32b has an elliptical spherical shape, and the opening 32a has an enlarged diameter. It is formed by processing. Further, as shown in FIG. 2A, the lid-like member 33 is formed as an annular flat plate member, and the upper annular projecting piece 2 of the valve body 20 is provided therein.
0a, and has an upper step-shaped portion 33b and a lower step-shaped portion 33c in the outer peripheral portion thereof.
And
【００２４】前記キャン３２、前記環状平板部材３３、
及び、前記弁本体２０との組立密封固定は、まず、図２
（ｂ）に示すように、前記弁本体２０の上部環状突出片
２０ａに前記環状平板部材３３の内部孔３３ａを嵌合
し、前記上部環状突出片２０ａを外周方向にかしめると
共に、前記弁本体２０の外周部２０ｂと前記平板部材３
３の下面とをロー付け溶接Ａを行う。その後、前記キャ
ン３２と前記蓋状部材３３内に前記ガイドブッシュ２
６、ロータ３９、スリーブ４０、弁軸３０、ロータ軸３
５等を収納した後、前記平板部材３３の上部の段差形状
部３３ｂに前記キャン３２の前記開口部３２ａの端部を
係合させ、その周囲をＴｉＧ溶接（タングステンイナー
トガス溶接）等で溶接Ｄを行い、これによって、前記キ
ャン１１内を密封状態としている。The can 32, the annular plate member 33,
In addition, assembling and sealing with the valve body 20 are first performed as shown in FIG.
As shown in (b), the internal hole 33a of the annular flat plate member 33 is fitted to the upper annular projecting piece 20a of the valve body 20, and the upper annular projecting piece 20a is caulked in the outer peripheral direction, and the valve body is 20 and the flat plate member 3
3 and the lower surface 3 is subjected to welding A. Thereafter, the guide bush 2 is inserted into the can 32 and the lid 33.
6, rotor 39, sleeve 40, valve shaft 30, rotor shaft 3
5 and the like, the end of the opening 32a of the can 32 is engaged with the step-shaped portion 33b at the top of the flat plate member 33, and the periphery thereof is welded by TiG welding (tungsten inert gas welding) or the like. As a result, the inside of the can 11 is sealed.
【００２５】前記溶接Ｄにおいて、図３（ａ）（ｂ）に
示すように、該溶接部Ｄの前記キャン３２の板厚ｔに対
して、前記平板部材３３の板厚Ｔが厚い場合には、該平
板部材３３のヒートマスが増加してしまい、ＴｉＧ溶接
時に、該溶接Ｄの溶け込みの位置にバラツキが生じ易
く、その結果として、前記キャン３２もしくは平板部材
３３の溶接部分Ｄ1、Ｄ2は、その接合部からの長さｌ1
もしくはｌ2のいずれか一方が短くなりアンバラとなっ
てしまい、接合強度が低いものとなる虞がある。In the welding D, as shown in FIGS. 3A and 3B, when the plate thickness T of the flat plate member 33 is larger than the plate thickness t of the can 32 at the welded portion D, As a result, the heat mass of the flat plate member 33 increases, and the position of penetration of the weld D tends to vary during TiG welding. As a result, the welding portions D 1 and D 2 of the can 32 or the flat plate member 33 are reduced. , The length l 1 from its junction
Alternatively, one of l 2 may be shortened and become unbalanced, and the bonding strength may be low.
【００２６】このため、本実施形態においては、この溶
接Ｄの溶け込み位置のバラツキを防ぐためのに、前記蓋
状部材３３の下部に下部の段差形状部３３ｃを形成し
て、該平板部材３３の外周部の肉厚Ｔ1を薄くすること
で、前記蓋状部材３３のヒートマスを減少させて、Ｔｉ
Ｇ溶接時の該溶接Ｄの溶け込みの位置のバラツキを少な
くし、前記キャン３２と平板部材３３の溶接部分Ｄの接
合部からの長さｌ1、ｌ2を同じ長さに一致させたもので
ある。これにより、前記キャン３２と平板部材３３の溶
接部分Ｄを強固な接合部としたものである。For this reason, in the present embodiment, in order to prevent variation in the penetration position of the welding D, a lower step-shaped portion 33 c is formed below the lid member 33, and By reducing the thickness T 1 of the outer peripheral portion, the heat mass of the lid 33 is reduced,
The variation in the penetration position of the welding D during the G welding is reduced, and the lengths l 1 and l 2 of the can 32 and the flat plate member 33 from the welding portion D are made equal to each other. is there. Thus, the welded portion D between the can 32 and the flat plate member 33 is a strong joint.
【００２７】このような構成の本実施形態の電動弁１に
おいては、前記マグネットワイヤ１５を一方向に通電励
磁すると、ロータ３９、スリーブ４０、ロータ軸３５、
ホルダ２８等が一体的に正転（ここでは右回りに回転）
し、前記雌ねじ部２７と雄ねじ部２９との螺合によるね
じ送りにより前記弁軸３０が下降せしめられて、前記弁
体３１により、前記流体入出口２３が閉じられる。In the motor-operated valve 1 of this embodiment having such a configuration, when the magnet wire 15 is energized in one direction, the rotor 39, the sleeve 40, the rotor shaft 35,
The holder 28 and the like are integrally rotated forward (here, clockwise)
Then, the valve shaft 30 is lowered by screwing by screwing the female screw portion 27 and the male screw portion 29, and the fluid inlet / outlet 23 is closed by the valve element 31.
【００２８】前記流体入出口２３が弁体３１で閉じられ
た時点では、前記可動側ストッパ４５が固定側ストッパ
５５に未だ衝接しておらず、前記弁軸３０の弁体３１が
前記流体入出口２３を閉じたまま、前記ホルダ２８等は
さらに回転下降せしめられる。このときの前記弁軸３０
に対する前記ホルダ２８の下降量は、前記コイルスプリ
ング３７が圧縮されることにより吸収される。When the fluid inlet / outlet 23 is closed by the valve 31, the movable-side stopper 45 has not yet come into contact with the fixed-side stopper 55, and the valve 31 of the valve shaft 30 is connected to the fluid inlet / outlet. With the 23 closed, the holder 28 and the like are further rotated down. The valve shaft 30 at this time
Is lowered by the compression of the coil spring 37.
【００２９】その後さらに、前記ホルダ２８等が回転下
降せしめられると、前記可動側ストッパ４５が固定側ス
トッパ５５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いても、前記スリーブ４０、軸３
５、ホルダ２８等の回転下降運動が強制的に停止せしめ
られる。Thereafter, when the holder 28 and the like are further rotated down, the movable-side stopper 45 abuts against the fixed-side stopper 55, so that the energization to the rotor 39 is continued even if the energization to the rotor 39 is continued. 40, axis 3
5. The rotation and downward movement of the holder 28 and the like are forcibly stopped.
【００３０】また、流体入出口２３を開くときは、マグ
ネットワイヤ１５を前記流体入出口２３を閉じるときと
は逆方向に通電励磁することにより、ロータ軸３５を逆
回転させて、前記流体入出口２３を開口する。When the fluid inlet / outlet 23 is opened, the magnet wire 15 is energized in a direction opposite to the direction in which the fluid inlet / outlet 23 is closed. 23 is opened.
【００３１】このように、本実施形態の電動弁１は、キ
ャン３２と、該キャン３２を弁本体２０に連結固定する
蓋状部材３３とを、前記説明した構造とし、前記キャン
３２と前記蓋状部材３３との接合溶接部を、該蓋状部材
３３の外周に形成した上部の段差形状部３３ｂに前記キ
ャン３２の開口部３２ａの端部を係合する構造として、
その周囲を溶接するべく構成したので、従来の冷媒に対
して高圧の代替冷媒が前記キャン３２内に供給されて
も、前記キャン３２は、前記代替冷媒の径方向の圧力に
対しては、筒状の開口部３２ａで受けることとなり、か
つ、前記代替冷媒の長手方向（上方）の圧力に対して
は、前記溶接部Ｄの引っ張り力として受けるので、該接
合部Ｄが、キャン３２内の従来の冷媒に比べて高い圧力
の代替冷媒によって、その稼働中、繰り返し応力の作用
を受けたとしても、該繰り返し応力によって亀裂が発生
するようなことはない。As described above, in the motor-operated valve 1 of the present embodiment, the can 32 and the lid member 33 for connecting and fixing the can 32 to the valve body 20 have the above-described structure, and the can 32 and the lid A structure in which an end of the opening 32a of the can 32 is engaged with an upper step-shaped portion 33b formed on the outer periphery of the lid-shaped member 33,
Since the surroundings are welded, even if a high-pressure alternative refrigerant is supplied into the can 32 with respect to the conventional refrigerant, the can 32 is in a cylindrical shape with respect to the radial pressure of the alternative refrigerant. And the pressure in the longitudinal direction (upward) of the alternative refrigerant is received as the pulling force of the welded portion D. Even if the refrigerant is repeatedly subjected to the action of stress during its operation by the alternative refrigerant having a higher pressure than the refrigerant, no crack is generated by the repeated stress.
【００３２】また、前記平板部材３３は、代替冷媒の作
動圧力に耐えるために、その周部の下部に段差形状部３
３ｃを形成したことにより、前記溶接位置のバラツキを
なくして、溶接強度の強い溶接部を得ることができる。In order to withstand the operating pressure of the alternative refrigerant, the flat plate member 33 has a stepped portion 3 at its lower part.
By forming 3c, it is possible to eliminate a variation in the welding position and obtain a welded portion having a high welding strength.
【００３３】[0033]
【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、蓋状部材を環状平板とし、該環状平板の
外周部に前記キャンの筒状開口部を係合して該係合部を
溶接接合したことで、新冷媒に対応した強度の強いキャ
ン部分を実現できる。また、蓋状部材の環状平板部材の
下部外周に段差形状部を設けたことで、溶接位置を一定
とすることができるので、強度のある接合部を実現でき
る。As will be understood from the above description, the motor-operated valve of the present invention has a lid-like member formed into an annular flat plate, and the cylindrical opening of the can is engaged with the outer peripheral portion of the annular flat plate. By welding the engagement portions, a strong can portion corresponding to the new refrigerant can be realized. Further, by providing the step-shaped portion on the outer periphery of the lower part of the annular flat plate member of the lid-like member, the welding position can be fixed, so that a strong joint can be realized.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明に係る電動弁の一実施形態の断面図。FIG. 1 is a sectional view of an embodiment of a motor-operated valve according to the present invention.
【図２】図１に示される電動弁のキャンと蓋状部材との
拡大断面図。FIG. 2 is an enlarged sectional view of a can and a lid-like member of the electric valve shown in FIG.
【図３】電動弁のキャンと蓋状部材との接合溶接部に他
の例を示す断面図。FIG. 3 is a cross-sectional view showing another example of a joint weld between the can of the motor-operated valve and the lid-like member.
【図４】従来の電動弁の一例を示す断面図。FIG. 4 is a sectional view showing an example of a conventional motor-operated valve.
【図５】図４の従来の電動弁におけるキャンと蓋状部材
との溶接接合部を示す拡大断面図。FIG. 5 is an enlarged sectional view showing a welded joint between the can and the lid-like member in the conventional motor-operated valve shown in FIG.
１ 電動弁 １０ ステッピングモータ ２０ 弁本体 ２０ａ 上部環状突出部 ２３ 流体入出口 ３０ 弁軸 ３２ キャン ３２ａ 開口部 ３３ 蓋状部材 ３３ａ 内部孔 ３３ｂ 上部環状段差形状部 ３３ｃ 下部環状段差形状部 DESCRIPTION OF SYMBOLS 1 Electric valve 10 Stepping motor 20 Valve main body 20a Upper annular protrusion 23 Fluid inlet / outlet 30 Valve shaft 32 Can 32a Opening 33 Lid 33a Internal hole 33b Upper annular step 33c Lower annular step 33c
Claims (6)
ンと溶接結合されて前記弁本体に取付固定される蓋状部
材と、を備えた電動弁において、 前記蓋状部材は、環状平板とされ、該環状平板の外周部
に前記キャンの筒状開口部を係合し、該係合部を溶接接
合したことを特徴とする電動弁。1. A motor-operated valve comprising a valve body, a bottomed tubular can, and a lid member welded to the can and attached and fixed to the valve body, wherein the lid member comprises: A motor-operated valve comprising an annular flat plate, wherein a cylindrical opening of the can is engaged with an outer peripheral portion of the annular flat plate, and the engaged portion is welded and joined.
されていると共に、前記開口部が拡大されていて、一体
絞り成形加工されていることを特徴とする請求項１に記
載の電動弁。2. The motor-operated valve according to claim 1, wherein the can has a bottom formed in an elliptical spherical shape, has an enlarged opening, and is integrally drawn. .
形成し、該段差形状部に前記キャンの筒状開口部を係合
したことを特徴とする請求項１又は２に記載の電動弁。3. The motor-operated valve according to claim 1, wherein a stepped portion is formed at an upper portion of an outer periphery of the annular flat plate, and a cylindrical opening of the can is engaged with the stepped portion. .
を特徴とする請求項１乃至３のいずれか一項に記載の電
動弁。4. The motor-operated valve according to claim 1, wherein the welding is TiG welding.
形成したことを特徴とする請求項１乃至４のいずれか一
項に記載の電動弁。5. The motor-operated valve according to claim 1, wherein a step-shaped portion is formed at a lower portion of an outer periphery of the annular flat plate.
体の上部環状突出片を係合して、該上部環状突出片で前
記環状平板をかしめ固定すると共に、前記環状平板の下
面と前記弁本体の上部周部をロー付溶接接合したことを
特徴とする請求項１乃至５のいずれか一項に記載の電動
弁。6. The annular flat plate engages an upper annular projecting piece of the valve body with an internal hole thereof, and caulks and fixes the annular flat plate with the upper annular projecting piece. The motor-operated valve according to any one of claims 1 to 5, wherein an upper peripheral portion of the valve body is welded and joined by brazing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17871397A JP3905602B2 (en) | 1997-07-03 | 1997-07-03 | Motorized valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17871397A JP3905602B2 (en) | 1997-07-03 | 1997-07-03 | Motorized valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1122846A true JPH1122846A (en) | 1999-01-26 |
| JP3905602B2 JP3905602B2 (en) | 2007-04-18 |
Family
ID=16053272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17871397A Expired - Fee Related JP3905602B2 (en) | 1997-07-03 | 1997-07-03 | Motorized valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3905602B2 (en) |
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| JP2000297873A (en) * | 1999-04-15 | 2000-10-24 | Fuji Koki Corp | Motor-operated valve |
| JP2003254461A (en) * | 2002-03-05 | 2003-09-10 | Saginomiya Seisakusho Inc | Electric control valve |
| JP2006057738A (en) * | 2004-08-20 | 2006-03-02 | Pacific Ind Co Ltd | Electric valve |
| JP2006070990A (en) * | 2004-09-01 | 2006-03-16 | Fuji Koki Corp | Electric valve |
| JP2007211814A (en) * | 2006-02-07 | 2007-08-23 | Saginomiya Seisakusho Inc | Motor-operated valve and solenoid valve |
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| WO2012136107A1 (en) * | 2011-04-02 | 2012-10-11 | 浙江三花股份有限公司 | Refrigeration system and electric valve |
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| JP2000297873A (en) * | 1999-04-15 | 2000-10-24 | Fuji Koki Corp | Motor-operated valve |
| JP2003254461A (en) * | 2002-03-05 | 2003-09-10 | Saginomiya Seisakusho Inc | Electric control valve |
| JP2006057738A (en) * | 2004-08-20 | 2006-03-02 | Pacific Ind Co Ltd | Electric valve |
| JP2006070990A (en) * | 2004-09-01 | 2006-03-16 | Fuji Koki Corp | Electric valve |
| JP4676179B2 (en) * | 2004-09-01 | 2011-04-27 | 株式会社不二工機 | Motorized valve |
| JP2007211814A (en) * | 2006-02-07 | 2007-08-23 | Saginomiya Seisakusho Inc | Motor-operated valve and solenoid valve |
| JP2008101633A (en) * | 2006-10-17 | 2008-05-01 | Fuji Koki Corp | Flow control valve and manufacturing method of can for the flow control valve |
| WO2012136107A1 (en) * | 2011-04-02 | 2012-10-11 | 浙江三花股份有限公司 | Refrigeration system and electric valve |
| CN102734526A (en) * | 2011-04-02 | 2012-10-17 | 浙江三花股份有限公司 | Refrigeration system and electric valve |
| CN102927342B (en) * | 2011-08-09 | 2014-05-14 | 浙江三花股份有限公司 | Electronic expansion valve and valve body component thereof |
| CN102927342A (en) * | 2011-08-09 | 2013-02-13 | 浙江三花股份有限公司 | Electronic expansion valve and valve body component thereof |
| JP2014052037A (en) * | 2012-09-07 | 2014-03-20 | Saginomiya Seisakusho Inc | Electromagnetic actuator and motor valve including the same |
| WO2014163208A1 (en) * | 2013-04-05 | 2014-10-09 | 日本電産サンキョー株式会社 | Valve device |
| JPWO2014163208A1 (en) * | 2013-04-05 | 2017-02-16 | 日本電産サンキョー株式会社 | Valve device |
| JP2015075187A (en) * | 2013-10-10 | 2015-04-20 | 日立アプライアンス株式会社 | Refrigerant switching valve and equipment including refrigerant switching valve |
| CN107076329A (en) * | 2016-06-23 | 2017-08-18 | 太平洋工业株式会社 | Motor-driven valve |
| US10253903B2 (en) | 2016-06-23 | 2019-04-09 | Pacific Industrial Co., Ltd. | Motor-operated valve |
| CN107076329B (en) * | 2016-06-23 | 2019-04-23 | 太平洋工业株式会社 | Motor-driven valve |
| JP2019128036A (en) * | 2018-01-25 | 2019-08-01 | 株式会社不二工機 | Flow-control valve |
| CN111664256A (en) * | 2019-03-05 | 2020-09-15 | 株式会社鹭宫制作所 | Electric valve and refrigeration cycle system |
| JP2021055765A (en) * | 2019-09-30 | 2021-04-08 | 株式会社鷺宮製作所 | Valve gear and refrigeration cycle device |
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