JP4839070B2 - Motorized valve - Google Patents

Motorized valve Download PDF

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JP4839070B2
JP4839070B2 JP2005344499A JP2005344499A JP4839070B2 JP 4839070 B2 JP4839070 B2 JP 4839070B2 JP 2005344499 A JP2005344499 A JP 2005344499A JP 2005344499 A JP2005344499 A JP 2005344499A JP 4839070 B2 JP4839070 B2 JP 4839070B2
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fitting hole
valve body
excitation device
valve
fluid inlet
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JP2007147013A (en
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雅也 佐藤
仁志 梅澤
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Fujikoki Corp
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Description

本発明は、例えば空気調和機、冷凍機等に用いられる電動弁に係り、特にはキャン、弁本体への励磁装置の取付構造の改良に関する。   The present invention relates to a motor-operated valve used in, for example, an air conditioner, a refrigerator, and the like, and more particularly, to an improvement in a mounting structure of an exciter to a can and a valve body.

従来から、空気調和機、冷凍機等には、冷媒等の流体の流量を制御するために電動弁が用いられている。このような電動弁の一例として、特許文献1及び特許文献2のように、弁室、弁座、及び、垂直方向および水平方向にそれぞれ延出する2本の流体入出管を有する弁本体と、弁本体に固着されたキャンとを備えており、キャンの内側にロータが内蔵され、キャンの外部にロータを電磁的に回転駆動する励磁装置が外嵌されている。   Conventionally, motor-operated valves are used in air conditioners, refrigerators, and the like to control the flow rate of a fluid such as a refrigerant. As an example of such an electric valve, as in Patent Document 1 and Patent Document 2, a valve body having a valve chamber, a valve seat, and two fluid inlet / outlet pipes extending in the vertical and horizontal directions, A can is fixed to the valve body, a rotor is built inside the can, and an excitation device for electromagnetically rotating the rotor is fitted outside the can.

この電動弁では、励磁装置の下部に2つの腕部を有する回り止め部材であるクリップが固定されている。励磁装置の中央に形成された嵌合孔にキャンを嵌合させて弁本体方向に押し込むことにより、励磁装置に固定したクリップの2つの腕部が水平方向の流体入出管に係合保持され、キャンおよび弁本体に励磁装置が取り付けられる。
特開2000−346226号公報 特開2003−185302号公報
In this motor-operated valve, a clip which is a rotation preventing member having two arm portions is fixed to the lower part of the excitation device. By fitting a can into a fitting hole formed in the center of the exciter and pushing it in the valve body direction, the two arms of the clip fixed to the exciter are engaged and held in the horizontal fluid inlet / outlet pipe, An exciter is attached to the can and the valve body.
JP 2000-346226 A JP 2003-185302 A

しかしながら、上述した特許文献1および特許文献2の電動弁では、励磁装置の嵌合孔と嵌合されるキャンとの間にクリアランスがあると、クリップによる1点支持のみとなるために、ガタツキが生じ、例えばイニシャライズ時等に振動に起因する異音が発生してしまうという問題があった。   However, in the electric valves of Patent Document 1 and Patent Document 2 described above, if there is a clearance between the fitting hole of the exciter and the can to be fitted, only one point is supported by the clip. For example, there is a problem that abnormal noise due to vibration occurs at the time of initialization.

本発明は、上記実情に鑑みてなされたもので、例えばイニシャライズ時等に異音が発生するのを防止して低騒音化することができる電動弁を提供することを目的とする。   The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a motor-operated valve capable of preventing noise from being generated at the time of initialization or the like and reducing noise.

上記目的を達成するため、本発明の電動弁は、
弁体により流体の通過流量を調整する弁本体と、
該弁本体に固着され前記弁体を開閉させるロータを内蔵するキャンと、
該キャンの外周部に嵌合される嵌合孔が形成されるとともに前記ロータを回転駆動する励磁装置と、
前記弁本体に連設された1対の流体入出管と、
前記励磁装置に取り付けられ、前記1対の流体入出管のうち水平流体入出管に係合するクリップとを備え
前記励磁装置の嵌合孔には、三角錐状の形状を成す複数の突出部が前記嵌合孔中心に対して等角度間隔で形成され、
三角錐状を成す前記突出部は、その一つの面が前記嵌合孔方向に突出する頂点を有し前記嵌合孔の上縁と面一を成すとともに一つの稜線が斜め下向きとなるように形成されており、
前記突出部は、前記励磁装置の前記嵌合孔に前記キャンが挿嵌されることにより、前記頂点部位が前記キャンの外周部に押し潰されて、当該キャン外周部に隙間なく嵌合する、
ことを特徴とする。
In order to achieve the above object, the motor-operated valve of the present invention includes:
A valve body that adjusts the flow rate of fluid through the valve body;
Is secured to the valve body, and the can having a built-in rotor to open and close the valve body,
An excitation device that is formed with a fitting hole to be fitted to the outer periphery of the can and rotationally drives the rotor;
A pair of fluid inlet / outlet pipes connected to the valve body;
A clip attached to the excitation device and engaged with a horizontal fluid inlet / outlet pipe of the pair of fluid inlet / outlet pipes ;
In the fitting hole of the excitation device, a plurality of protrusions having a triangular pyramid shape are formed at equiangular intervals with respect to the fitting hole center,
The projecting portion having a triangular pyramid shape has a vertex whose one surface projects in the direction of the fitting hole, is flush with the upper edge of the fitting hole, and one ridge line is obliquely downward. Formed,
When the can is inserted into the fitting hole of the excitation device, the protruding portion is crushed by the outer peripheral portion of the can and is fitted to the outer peripheral portion of the can without any gap.
It is characterized by that.

また、前記励磁装置は、前記クリップ及び前記突出部の2つを支持点として前記弁本体及び前記キャンに固定されることを特徴とする。   The exciter may be fixed to the valve body and the can with the clip and the protrusion as two supporting points.

本発明によれば、例えばイニシャライズ時等に異音が発生するのを防止して低騒音化することができる電動弁を提供することがコスト上昇を招くことなく達成できる。   According to the present invention, for example, it is possible to provide a motor-operated valve capable of preventing noise from being generated at the time of initialization or the like and reducing the noise without causing an increase in cost.

本発明の実施の形態に係る電動弁について、以下図面を参照して説明する。電動弁10は、図2及び図3に示すように、弁室内の弁座に接離して開弁・閉弁を行う弁体により冷媒の通過流量を調整する弁本体20と、弁本体20に固着され弁体を開閉動作させるロータを内蔵するキャン40と、キャン40に外嵌されロータを回転駆動する励磁装置Sとを備えている。ロータと励磁装置Sによりステッピングモータを構成している。また、弁本体20の弁室には、冷媒等の流体が出入する垂直方向に延出する流体入出管20aと水平方向に延出する流体入出管20bとが設けられている。   An electric valve according to an embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 2 and 3, the motor-operated valve 10 includes a valve main body 20 that adjusts a flow rate of refrigerant through a valve body that opens and closes a valve seat in a valve chamber, and a valve main body 20. A can 40 having a built-in rotor that opens and closes the valve body and an excitation device S that is fitted on the can 40 and rotationally drives the rotor are provided. The rotor and the excitation device S constitute a stepping motor. The valve chamber of the valve body 20 is provided with a fluid inlet / outlet pipe 20a extending in the vertical direction through which fluid such as a refrigerant enters and exits and a fluid inlet / outlet pipe 20b extending in the horizontal direction.

キャン40はステンレス等の非磁性の金属から形成される有底円筒状をしており、弁本体20の上部に固着されたステンレス製の鍔状板41に溶接等により固着され、内部は気密状態に保たれている。励磁装置Sは磁性材により構成されるステータ51と、このステータ51にボビン52を介して巻回される上下のステータコイル53,53とから構成され、これらの各構成要素が合成樹脂からなるモールド体50によってモールドされることによって励磁装置Sに防水・防湿性が付与されている。励磁装置Sのモールド体50には、キャン40に外嵌する嵌合孔50aが形成されている。   The can 40 has a bottomed cylindrical shape formed of a non-magnetic metal such as stainless steel, and is fixed to a stainless steel flange 41 fixed to the upper part of the valve body 20 by welding or the like, and the inside is airtight. It is kept in. The excitation device S includes a stator 51 made of a magnetic material, and upper and lower stator coils 53 and 53 wound around the stator 51 via a bobbin 52, and each of these components is a mold made of a synthetic resin. By being molded by the body 50, the excitation device S is provided with waterproof and moistureproof properties. The mold body 50 of the exciter S is formed with a fitting hole 50 a that fits outside the can 40.

また、図1に示すように、モールド体50の嵌合孔50aの上縁部分には複数の逆三角錐状の突出部(リブ)60が形成されている。突出部60は、図4に示すように、逆三角錐状の一つの面が嵌合孔50a方向に突出する頂点を有し嵌合孔50aの端面(上縁)50cと面一を成すとともに、一つの稜線60aが斜め下向きとなるように形成されている。この突出部60は、図2に示すように、モールド体50の嵌合孔50aにキャン40が挿嵌されると、キャン40の外周面との当接部分がつぶされた状態でキャン40を支持する。3つの突出部60は、モールド体50の中心に対して等角度間隔で形成されている。 As shown in FIG. 1, a plurality of inverted triangular pyramidal protrusions (ribs) 60 are formed on the upper edge portion of the fitting hole 50 a of the mold body 50. As shown in FIG. 4, the protruding portion 60 has an apex in which one surface of an inverted triangular pyramid protrudes in the direction of the fitting hole 50 a and is flush with the end face (upper edge) 50 c of the fitting hole 50 a. , One ridge line 60a is formed to be obliquely downward. As shown in FIG. 2, when the can 40 is inserted into the fitting hole 50 a of the mold body 50, the protruding portion 60 can be moved in a state where the contact portion with the outer peripheral surface of the can 40 is crushed. To support. The three protrusions 60 are formed at equiangular intervals with respect to the center of the mold body 50.

弁本体20は黄銅等の金属から構成され、キャン40との接合は、キャン40に溶接等により固着された鍔状板41の段差部にキャン40の端部を突き合わせ溶接することにより行っている。なお、突き合わせ溶接に限らず、キャン40の端部を外周に平坦に折り曲げて鍔状部として形成し、この鍔状部と鍔状板41とをいわゆる拝み溶接により固定するようにしてもよい。   The valve body 20 is made of a metal such as brass, and is joined to the can 40 by butt welding the end of the can 40 to the stepped portion of the bowl-like plate 41 fixed to the can 40 by welding or the like. . Not only butt welding, but also the end of the can 40 may be bent flat on the outer periphery to form a bowl-like part, and the bowl-like part and the bowl-like plate 41 may be fixed by so-called worship welding.

モールド体50からは、ステータコイル53、53に接続された複数のリード端子54が突出しており、このリード端子54に複数のリード線55が接続されたコネクタ56が連結されている。そして、コネクタ56を覆うカバー57がモールド体50に溶着され、カバー57内はシリコーン樹脂等の充填材58で充填されている。   A plurality of lead terminals 54 connected to the stator coils 53, 53 protrude from the mold body 50, and a connector 56 having a plurality of lead wires 55 connected thereto is coupled to the lead terminals 54. A cover 57 covering the connector 56 is welded to the mold body 50, and the inside of the cover 57 is filled with a filler 58 such as silicone resin.

励磁装置Sつまりモールド体50は中心に開口された嵌合孔50aを有し、この嵌合孔50aにキャン40の外周面が突出部60により支持された状態で嵌合される。モールド体50の下面に溶着されたクリップ59で水平方向に延出する流体入出管20bを保持することにより、励磁装置Sは弁本体20及びキャン40に固定される。   The excitation device S, that is, the mold body 50 has a fitting hole 50a opened in the center, and the fitting hole 50a is fitted with the outer peripheral surface of the can 40 supported by the protruding portion 60. The exciter S is fixed to the valve body 20 and the can 40 by holding the fluid inlet / outlet pipe 20b extending in the horizontal direction with a clip 59 welded to the lower surface of the mold body 50.

クリップ59は、例えばステンレススチール等の弾性を有する金属板から構成され、取付孔59bを形成した水平方向の基部59aと、この基部59aより下方に延出する2つの腕部59c,59cを有するとともに、基部59aから立設された位置決め部59dが形成されている。   The clip 59 is made of, for example, a metal plate having elasticity such as stainless steel, and has a horizontal base portion 59a in which a mounting hole 59b is formed, and two arm portions 59c and 59c extending downward from the base portion 59a. , A positioning portion 59d erected from the base portion 59a is formed.

2つの腕部59c,59cは基部59cより延出される平行部とその下方に連続する湾曲部とを有し、湾曲部は水平方向に延出する流体入出管20bの管径と同等の曲率半径で形成されている。位置決め部59dは、上方に立設された一対の板状の部材からなり、モールド体50の外周部に係合することにより突部50bに対して回転するのを防止している。クリップ59は取付孔59bにモールド体50の突部50bを挿入して超音波ウェルダ等により押しつぶすことにより固定される。   The two arm portions 59c, 59c have a parallel portion extending from the base portion 59c and a curved portion continuous below the parallel portion, and the curved portion has a radius of curvature equivalent to the tube diameter of the fluid inlet / outlet tube 20b extending in the horizontal direction. It is formed with. The positioning portion 59d is composed of a pair of plate-like members standing upward, and is prevented from rotating with respect to the protrusion 50b by engaging with the outer peripheral portion of the mold body 50. The clip 59 is fixed by inserting the projection 50b of the mold body 50 into the mounting hole 59b and crushing it with an ultrasonic welder or the like.

このように本実施の形態の電動弁10では、励磁装置S(モールド体50)をキャン40及び弁本体20に固定するのに、クリップ59により流体入出管20bを保持するとともに、複数の突出部60によりキャン40の外周面を支持するので、2つの支持点により励磁装置Sを支持することができる。   As described above, in the motor-operated valve 10 of the present embodiment, in order to fix the excitation device S (mold body 50) to the can 40 and the valve body 20, the clip 59 holds the fluid inlet / outlet pipe 20b and a plurality of protrusions. Since the outer peripheral surface of the can 40 is supported by 60, the excitation device S can be supported by two support points.

その結果、本実施の形態の電動弁10では、ガタツキを防止することができ、例えばイニシャライズ時等に振動に起因する異音の発生を防止して低騒音化を実現することができる。   As a result, in the motor operated valve 10 of the present embodiment, it is possible to prevent backlash, and for example, noise generation due to vibration can be prevented at the time of initialization or the like, and noise reduction can be realized.

以上、実施形態を挙げて本発明を説明したが、本発明は上記実施形態に限定されるものではなく、種々変形が可能である The present invention has been described with reference to the embodiment. However, the present invention is not limited to the above embodiment, and various modifications can be made .

また、本実施の形態では、突出部60を3つ設ける例について説明したが、突出部60の数は3つに限らず、2つであっても、3つ以上であってもよい。   Moreover, although the example which provides the three protrusion parts 60 was demonstrated in this Embodiment, the number of the protrusion parts 60 is not restricted to three, Two or three or more may be sufficient.

また、本実施の形態では、クリップ59について基部59aが板状である例について説明したが、例えば基部の形状を略リング状に形成して、複数の取付孔59bを形成するようにしてもよいし、基部を長めに形成して、複数の取付孔59bを形成するようにしてもよいし、2つの腕部59c,59cにより流体入出管20bを保持する構造を有するクリップであればその形状は限定されない。   In the present embodiment, an example in which the base 59a has a plate shape has been described for the clip 59. However, for example, the base portion may be formed in a substantially ring shape to form a plurality of attachment holes 59b. However, the base may be formed longer to form a plurality of mounting holes 59b, or the shape of the clip having a structure for holding the fluid inlet / outlet pipe 20b by the two arms 59c, 59c is It is not limited.

本発明の実施形態に係る電動弁の励磁装置(モールド体)及びその周辺部分の概略構成を表す斜視図である。It is a perspective view showing the schematic structure of the exciting device (mold body) of the motor operated valve concerning the embodiment of the present invention, and its peripheral part. 図1に示した励磁装置が装備された状態の電動弁を表す断面図である。It is sectional drawing showing the motor operated valve in the state equipped with the exciting device shown in FIG. 図2に示した電動弁の平面図である。It is a top view of the motor operated valve shown in FIG. 図1に示した励磁装置を拡大して表す斜視図である。FIG. 2 is an enlarged perspective view illustrating the excitation device illustrated in FIG. 1.

符号の説明Explanation of symbols

10 電動弁
20 弁本体
20a,20b 流体入出管
40 キャン
50 モールド体
50a 嵌合孔
59 クリップ
S 励磁装置
60 突出部
DESCRIPTION OF SYMBOLS 10 Motorized valve 20 Valve body 20a, 20b Fluid inlet / outlet pipe 40 Can 50 Mold body 50a Fitting hole 59 Clip S Excitation device 60 Protruding part

Claims (2)

弁体により流体の通過流量を調整する弁本体と、
該弁本体に固着され前記弁体を開閉させるロータを内蔵するキャンと、
該キャンの外周部に嵌合される嵌合孔が形成されるとともに前記ロータを回転駆動する励磁装置と、
前記弁本体に連設された1対の流体入出管と、
前記励磁装置に取り付けられ、前記1対の流体入出管のうち水平流体入出管に係合するクリップとを備え
前記励磁装置の嵌合孔には、三角錐状の形状を成す複数の突出部が前記嵌合孔中心に対して等角度間隔で形成され、
三角錐状を成す前記突出部は、その一つの面が前記嵌合孔方向に突出する頂点を有し前記嵌合孔の上縁と面一を成すとともに一つの稜線が斜め下向きとなるように形成されており、
前記突出部は、前記励磁装置の前記嵌合孔に前記キャンが挿嵌されることにより、前記頂点部位が前記キャンの外周部に押し潰されて、当該キャン外周部に隙間なく嵌合する、
ことを特徴とする電動弁。
A valve body that adjusts the flow rate of fluid through the valve body;
Is secured to the valve body, and the can having a built-in rotor to open and close the valve body,
An excitation device that is formed with a fitting hole to be fitted to the outer periphery of the can and rotationally drives the rotor;
A pair of fluid inlet / outlet pipes connected to the valve body;
A clip attached to the excitation device and engaged with a horizontal fluid inlet / outlet pipe of the pair of fluid inlet / outlet pipes ;
In the fitting hole of the excitation device, a plurality of protrusions having a triangular pyramid shape are formed at equiangular intervals with respect to the fitting hole center,
The projecting portion having a triangular pyramid shape has a vertex whose one surface projects in the direction of the fitting hole, is flush with the upper edge of the fitting hole, and one ridge line is obliquely downward. Formed,
When the can is inserted into the fitting hole of the excitation device, the protruding portion is crushed by the outer peripheral portion of the can and is fitted to the outer peripheral portion of the can without any gap.
An electrically operated valve characterized by that.
前記励磁装置は、前記クリップ及び前記突出部の2つを支持点として前記弁本体及び前記キャン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 motor-driven valve according to claim 1, wherein the exciter is fixed to the valve body and the can with the two of the clip and the protrusion as supporting points.
JP2005344499A 2005-11-29 2005-11-29 Motorized valve Active JP4839070B2 (en)

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