JP2013224709A - Solenoid valve - Google Patents

Solenoid valve Download PDF

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JP2013224709A
JP2013224709A JP2012097528A JP2012097528A JP2013224709A JP 2013224709 A JP2013224709 A JP 2013224709A JP 2012097528 A JP2012097528 A JP 2012097528A JP 2012097528 A JP2012097528 A JP 2012097528A JP 2013224709 A JP2013224709 A JP 2013224709A
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valve
port
lid member
cylinder
valve body
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JP5658194B2 (en
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Kumiko Sato
久美子 佐藤
Shigetoshi Nakajima
重利 中島
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Saginomiya Seisakusho Inc
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Saginomiya Seisakusho Inc
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Abstract

PROBLEM TO BE SOLVED: To enhance pressure resistance of a caulking part of a valve body to a valve member 3 in a solenoid valve in which an electromagnetic drive part 5 of a pilot valve 4 is arranged in a side part of the valve body 1, a piston valve 2 is spaced apart from a main valve port 13 by lowering a pressure of a back space 11A to a piston valve 2 of a cylinder 11, and an end 1A where the cylinder 11 of the valve body 1 opens is closed by a lid member 3.SOLUTION: A female screw part 1a is formed as an uneven part in an inner periphery of an end 1A where a cylinder 11 of a body part 1 opens. A male screw part 3a is formed as an uneven part in an outer periphery of the lid member 3. The lid member 3 is screwed and fixed into the end 1A. A distal end of the end 1A is caulked to a center side of the lid member 3. Sealing is carried out with solder 31. Force is dispersed in a fitting part of the female screw part 1a and the male screw part 3a.

Description

本発明は、弁本体に形成されたシリンダ内に主弁ポートに対向して内挿されたピストン弁を備え、シリンダのピストン弁に対する背空間の圧力を低圧にすることでピストン弁を主弁ポートから離間させるようにした電磁弁に関する。   The present invention includes a piston valve inserted into a cylinder formed in a valve body so as to face a main valve port, and lowering the pressure of the back space with respect to the piston valve of the cylinder to lower the piston valve to the main valve port. The present invention relates to a solenoid valve that is separated from the electromagnetic valve.

従来、この種の電磁弁として、例えば実公昭６１−４１０１５号公報（特許文献１）に開示されたものがある。特許文献１の図３に示されたものは、弁本体にシリンダが形成され、このシリンダ内にピストン弁を内挿するとともに、蓋体によって弁本体の端部を閉塞することにより、シリンダ内でピストン弁に対する背空間を構成している。また、この背空間を第１ポート（一次継手側のポート）に導通する第１導通路（摺動クリアランス）と、弁本体の側部に設けた電磁駆動部によりパイロット弁（球弁）を開とすることで第２ポート（二次継手側のポート）に導通する第２導通路（流路）を有している。   Conventionally, as this type of solenoid valve, for example, there is one disclosed in Japanese Utility Model Publication No. 61-41015 (Patent Document 1). 3 shown in FIG. 3 of Patent Document 1 is that a cylinder is formed in a valve body, and a piston valve is inserted into the cylinder, and the end of the valve body is closed with a lid, so that A back space for the piston valve is formed. In addition, the pilot valve (ball valve) is opened by a first conduction path (sliding clearance) that conducts this back space to the first port (port on the primary joint side) and an electromagnetic drive provided on the side of the valve body. As a result, a second conduction path (flow path) that conducts to the second port (port on the secondary joint side) is provided.

そして、流体が第１ポートから流入する流体の順方向（正方向）の流れの時は、パイロット弁を開にして第２導通路（流路）を介して背空間を第２ポートの低圧に導通し、ピストン弁の下部に作用する第１ポートの高圧と背空間の低圧との差圧によりピストン弁を主弁ポートから離間させる。また、流体が第２ポートから流入する流体の逆方向の流れの時は、パイロット弁を閉にして背空間を第１導通路（摺動クリアランス）を介して第１ポートの低圧に導通し、ピストン弁の下部に作用する第２ポートの高圧によりピストン弁を主弁ポートから離間させる。   When the fluid flows in the forward direction (forward direction) of the fluid flowing in from the first port, the pilot valve is opened and the back space is set to the low pressure of the second port via the second conduction path (flow path). The piston valve is separated from the main valve port by the differential pressure between the high pressure of the first port acting on the lower portion of the piston valve and the low pressure of the back space. Further, when the fluid flows in the reverse direction of the fluid flowing in from the second port, the pilot valve is closed and the back space is conducted to the low pressure of the first port through the first conduction path (sliding clearance). The piston valve is separated from the main valve port by the high pressure of the second port acting on the lower part of the piston valve.

なお、特許文献１に従来技術として記載されている電磁弁は、ピストン弁にパイロットポートを形成するとともにパイロット弁をピストン弁と同軸に設けるようにしているので、パイロット弁のプランジャやプランジャばね等がピストン弁の動作に影響するが、前記のようにパイロット弁の電磁駆動部を弁本体の側部に設けた電磁弁はピストン弁の動作が容易になり、さらには、ピストン弁の上部にパイロット弁のプランジャやプランジャばね等がないため、ピストン弁のリフトを大きくすることができ大流量を流すことができる。   In addition, since the solenoid valve described as patent document 1 as a prior art forms the pilot port in the piston valve, and is providing the pilot valve coaxially with the piston valve, the plunger of the pilot valve, the plunger spring, etc. Although it affects the operation of the piston valve, as described above, the solenoid valve provided with the pilot valve electromagnetic drive part on the side of the valve body facilitates the operation of the piston valve. Since there is no plunger or plunger spring, the lift of the piston valve can be increased and a large flow rate can be flowed.

実公昭６１−４１０１５号公報Japanese Utility Model Publication No. 61-41015

特許文献１の電磁弁では、弁本体のシリンダ内にピストン弁やピストンばねを挿入した後、シリンダが開口する弁本体の端部に蓋体を嵌め込み、このシリンダが開口する弁本体の端部を蓋体の中心側にかしめることにより、蓋体を固定している。   In the solenoid valve of Patent Document 1, after inserting a piston valve or a piston spring into the cylinder of the valve body, a lid is fitted into the end of the valve body where the cylinder opens, and the end of the valve body where the cylinder opens is attached. The lid body is fixed by caulking to the center side of the lid body.

図５は上記従来の電磁弁の蓋体と同様な蓋部材の固定構造の一例及びその問題点を示す図である。弁本体ａに形成されたシリンダｂは円筒形状であり、シリンダｂが開口する弁本体ａの端部ａ１の内周は円形である。蓋部材ｃは円盤状の形状であり、蓋部材ｃは端部ａ１の内周の下端の段部ａ２に当接するようにして弁本体ａに嵌め込まれている。そして、弁本体ａの端部ａ１の先端を蓋部材ｃの中心側にかしめることにより蓋部材ｃが固定されている。そして、このかしめ部には半田ｄにより封止されている。   FIG. 5 is a view showing an example of a fixing structure of a lid member similar to the lid body of the conventional electromagnetic valve and its problems. The cylinder b formed in the valve body a is cylindrical, and the inner periphery of the end a1 of the valve body a where the cylinder b opens is circular. The lid member c has a disk shape, and the lid member c is fitted into the valve main body a so as to abut on the lower end step a2 of the inner periphery of the end a1. And the cover member c is being fixed by crimping the front-end | tip of the edge part a1 of the valve main body a to the center side of the cover member c. The caulking portion is sealed with solder d.

従来の固定構造は弁本体ａの端部ａ１の先端をかしめる構造となっているため、かしめ部において蓋部材ｃの外周の角が弁本体ａの端部ａ１の一箇所に当接する。このため、図５に矢印で示したように、シリンダｂの高圧による蓋部材ｃの押圧力を端部ａ１の一箇所で受けることになり、耐圧性に限界がある。   Since the conventional fixing structure has a structure in which the tip of the end a1 of the valve body a is caulked, the corner of the outer periphery of the lid member c abuts on one end a1 of the valve body a at the caulking part. For this reason, as shown by the arrow in FIG. 5, the pressing force of the lid member c due to the high pressure of the cylinder b is received at one place of the end a1, and the pressure resistance is limited.

本発明は、弁本体に形成したシリンダ内に主弁ポートを開閉するピストン弁を内挿するとともに、パイロット弁の電磁駆動部を弁本体の側部に設け、弁本体のシリンダが開口する端部を蓋部材で閉塞するようにした電磁弁において、蓋部材に対する弁本体のかしめ部の耐圧性を向上させることを課題とする。   The present invention inserts a piston valve that opens and closes a main valve port into a cylinder formed in a valve body, and also provides an electromagnetic drive portion of a pilot valve on a side portion of the valve body, and an end portion where the cylinder of the valve body opens. In a solenoid valve that is closed with a lid member, it is an object to improve the pressure resistance of the caulking portion of the valve body with respect to the lid member.

請求項１の電磁弁は、弁本体に、シリンダと、該シリンダの底部側の側面に第１ポートが形成されるとともに、前記シリンダの底部に主弁ポートと第２ポートとが形成され、該シリンダ内に前記主弁ポートを開閉するピストン弁が配設され、前記シリンダが開口する弁本体の端部を蓋部材で閉塞することで前記ピストン弁に対する背空間が形成され、前記第１ポートと前記背空間を導通する第１導通路と、前記第２ポートと前記背空間をパイロット弁を介して導通可能な第２導通路と、前記弁本体の側部に設けられ前記パイロット弁を駆動する電磁駆動部とを備え、順方向及び逆方向の流体の流れにより、低圧側の第２ポートまたは第１ポートを前記背空間に導通して該背空間を低圧にするとともに、高圧側の第１ポートまたは第２ポートの高圧をピストン弁に作用させることで、該ピストン弁を作動させて主弁ポートを開とするようにした電磁弁において、前記シリンダが開口する前記弁本体の端部の内周と、前記蓋部材の外周とに、互いに嵌合する凹凸部をそれぞれ設け、該凹凸部を嵌合させて該蓋部材を該弁本体の端部に嵌め込むとともに、該弁本体の端部の先端を該蓋部材の中心側にかしめることにより、該蓋部材で該シリンダを閉塞するようにしたことを特徴とする。   In the solenoid valve according to claim 1, the valve body includes a cylinder, a first port is formed on a side surface on the bottom side of the cylinder, and a main valve port and a second port are formed on the bottom of the cylinder. A piston valve that opens and closes the main valve port is disposed in the cylinder, and a back space with respect to the piston valve is formed by closing an end of a valve body that the cylinder opens with a lid member, and the first port and A first conduction path that conducts the back space, a second conduction path that can conduct the second port and the back space via a pilot valve, and a pilot valve that is provided on a side portion of the valve body and drives the pilot valve An electromagnetic drive unit, and the flow of the fluid in the forward direction and the reverse direction allows the second port or the first port on the low pressure side to be connected to the back space to lower the back space, and the first on the high pressure side. Port or second port In an electromagnetic valve in which pressure is applied to the piston valve to open the main valve port by operating the piston valve, the inner periphery of the end of the valve body where the cylinder opens, and the lid member Are provided on the outer periphery of the valve body so as to be fitted with each other, the concave and convex portions are fitted to fit the lid member into the end of the valve body, and the tip of the end of the valve body is placed on the lid member. The cylinder is closed by the lid member by caulking to the center side of the cylinder.

請求項２の電磁弁は、請求項１に記載の電磁弁であって、前記弁本体のかしめた端部と前記蓋部材とをろう付けにより封止するようにしたことを特徴とする。   A solenoid valve according to a second aspect is the electromagnetic valve according to the first aspect, wherein the crimped end portion of the valve body and the lid member are sealed by brazing.

請求項３の電磁弁は、請求項１または２に記載の電磁弁であって、前記弁本体の端部の内周に形成された前記凹凸部が雌ねじ部であり、前記蓋部材の外周に形成された前記凹凸部が該雌ねじ部に螺合する雄ねじ部であり、該蓋部材の表面に前記軸線の回りに該蓋部材を回転可能にするねじ締め用孔が形成されていることを特徴とする。   The electromagnetic valve according to claim 3 is the electromagnetic valve according to claim 1 or 2, wherein the uneven portion formed on an inner periphery of an end portion of the valve body is a female screw portion, and is provided on an outer periphery of the lid member. The formed concavo-convex portion is a male screw portion that is screwed into the female screw portion, and a screw tightening hole that allows the lid member to rotate about the axis is formed on the surface of the lid member. And

請求項１の電磁弁によれば、シリンダが開口する弁本体の端部の内周の凹凸部と、蓋部材の外周の凹凸部とが互いに嵌合して蓋部材が弁本体の端部に嵌め込まれ、そのうえで弁本体の端部の先端が蓋部材の中心側にかしめられているので、シリンダ内の圧力により蓋部材を軸線方向に押す力は、両方の凹凸部の嵌合部分において分散するので、かしめ部への力の作用を抑えることができ、耐圧性が向上する。   According to the solenoid valve of claim 1, the concave and convex portions on the inner periphery of the end of the valve body where the cylinder opens and the concave and convex portions on the outer periphery of the lid member are fitted to each other so that the lid member is at the end of the valve main body. Since the tip of the end of the valve body is crimped to the center side of the lid member, the force pushing the lid member in the axial direction by the pressure in the cylinder is dispersed in the fitting portions of both the uneven portions. Therefore, the action of force on the caulking portion can be suppressed, and the pressure resistance is improved.

請求項２の電磁弁によれば、請求項１の効果に加えて、弁本体のかしめた端部と蓋部材との例えば半田等によるろう付けによりシール性を保証できるとともに、さらに耐圧性が向上する。   According to the electromagnetic valve of the second aspect, in addition to the effect of the first aspect, the sealing performance can be ensured by brazing the crimped end portion of the valve body and the lid member with, for example, solder, and the pressure resistance is further improved. To do.

請求項３の電磁弁によれば、請求項１または２の効果に加えて、蓋部材の雄ねじ部をを弁本体の雌ねじ部にねじ込むことにより蓋部材を弁本体に固定できるので組み付け作業が容易になる。   According to the solenoid valve of claim 3, in addition to the effect of claim 1 or 2, the lid member can be fixed to the valve body by screwing the male thread part of the lid member into the female thread part of the valve body, so that the assembly work is easy. become.

本発明の第１実施形態の電磁弁の非通電時の縦断面図である。It is a longitudinal cross-sectional view at the time of the deenergization of the solenoid valve of 1st Embodiment of this invention. 本発明の第１実施形態の電磁弁の要部を拡大して示すとともにと凹凸部の作用を説明する図である。It is a figure explaining the effect | action of an uneven | corrugated | grooved part while expanding and showing the principal part of the solenoid valve of 1st Embodiment of this invention. 本発明の第２実施形態の電磁弁の要部縦断面図である。It is a principal part longitudinal cross-sectional view of the solenoid valve of 2nd Embodiment of this invention. 本発明の第３実施形態の電磁弁の要部を拡大して示すとともに凹凸部の作用を説明する図である。It is a figure explaining the effect | action of an uneven | corrugated | grooved part while expanding and showing the principal part of the solenoid valve of 3rd Embodiment of this invention. 従来の電磁弁の蓋部材の固定構造とその問題点を説明する図である。It is a figure explaining the fixing structure of the cover member of the conventional solenoid valve, and its problem.

次に、本発明の電磁弁の実施形態を図面を参照して説明する。図１は第１実施形態の電磁弁の非通電時の縦断面図、図２は同電磁弁の要部を拡大して示すとともに凹凸部の作用を説明する図である。なお、以下の説明における「上下」の概念は図１の図面における上下に対応する。この電磁弁は金属製の弁本体１と、ピストン弁２と、蓋部材３と、パイロット弁４と、電磁駆動部５を有している。   Next, an embodiment of a solenoid valve of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view when the solenoid valve of the first embodiment is not energized, and FIG. 2 is an enlarged view of a main part of the solenoid valve and explaining the operation of the uneven portion. Note that the concept of “upper and lower” in the following description corresponds to the upper and lower sides in the drawing of FIG. This electromagnetic valve has a metal valve body 1, a piston valve 2, a lid member 3, a pilot valve 4, and an electromagnetic drive unit 5.

弁本体１には、軸線Ｌを中心とする円筒形状のシリンダ１１と、シリンダ１１の底部１１ａ側の側面に開口する「第１ポート」としての入口ポート１２と、シリンダ１１の底部１１ａにシリンダ１１と同軸に開口する主弁ポート１３と、主弁ポート１３に連通する「第２ポート」としての出口ポート１４とが形成されている。入口ポート１２には一次側継手１０が接続され、出口ポート１４には二次側継手２０が接続されている。冷媒等の流体が順方向に流れるときは、図に実線の矢印で示したように、流体は入口ポート１２から流入して出口ポート１４から流出し、流体が逆方向に流れるときは、図に破線の矢印で示したように、流体は出口ポート１４から流入して入口ポート１２から流出する。   The valve body 1 includes a cylindrical cylinder 11 centered on the axis L, an inlet port 12 as a “first port” opened on a side surface of the cylinder 11 on the bottom 11 a side, and a cylinder 11 on the bottom 11 a of the cylinder 11. A main valve port 13 that opens coaxially with the main valve port 13 and an outlet port 14 that serves as a “second port” communicating with the main valve port 13 are formed. A primary side joint 10 is connected to the inlet port 12, and a secondary side joint 20 is connected to the outlet port 14. When a fluid such as a refrigerant flows in the forward direction, as shown by a solid arrow in the figure, the fluid flows in from the inlet port 12 and flows out from the outlet port 14, and when the fluid flows in the reverse direction, As indicated by the dashed arrows, fluid flows in from the outlet port 14 and out of the inlet port 12.

主弁ポート１３の周囲は主弁座１３ａとなっており、シリンダ１１内には金属製のピストン弁２が主弁ポート１３に対向するように内挿されている。ピストン弁２は、シリンダ１１内に摺動自在に整合する円柱状の大径部２Ａと、この大径部２Ａより径の小さな主弁部２Ｂとを有しており、このピストン弁２は主弁座１３ａに対して主弁部２Ｂを離座／着座することにより主弁ポート１３を開閉する。   The main valve port 13 is surrounded by a main valve seat 13 a, and a metal piston valve 2 is inserted into the cylinder 11 so as to face the main valve port 13. The piston valve 2 has a cylindrical large-diameter portion 2A that is slidably aligned in the cylinder 11, and a main valve portion 2B having a diameter smaller than that of the large-diameter portion 2A. The main valve port 13 is opened and closed by separating / sitting the main valve portion 2B with respect to the valve seat 13a.

蓋部材３は、後述のように弁本体１の端部１Ａ内に固着され、この蓋部材３で端部１Ａを閉塞することで、シリンダ１１の底部１１ａと反対側にピストン弁２に対する背空間１１Ａが形成されている。また、ピストン弁２の主弁部２Ｂはシリンダ１１の底部１１ａ側にあり、主弁部２Ｂの回りには底部側空間１１Ｂが形成されている。   The lid member 3 is fixed in the end portion 1A of the valve main body 1 as will be described later, and the end portion 1A is closed by the lid member 3 so that the back space with respect to the piston valve 2 is opposite to the bottom portion 11a of the cylinder 11. 11A is formed. The main valve portion 2B of the piston valve 2 is on the bottom 11a side of the cylinder 11, and a bottom side space 11B is formed around the main valve portion 2B.

ピストン弁２の大径部２Ａにはシリンダ１１内の背空間１１Ａに開口するばね受け凹部２ａが形成されており、このばね受け凹部２ａ内に蓋部材３に当接するピストンばね２１が配設されている。また、ピストン弁２には、軸線Ｌと直交するように主弁部２Ｂを貫通する横導通路２ｂと、横導通路２ｂに導通する縦穴状の小導通路２ｃと、この小導通路２ｃからばね受け凹部２ａに開口する大導通路２ｄが形成されている。この横導通路２ｂ、小導通路２ｃ、大導通路２ｄ、ばね受凹部２ａ及びシリンダ１１とピストン弁２とのクリアランスは、入口ポート１２（第１ポート）と背空間１１Ａを導通する「第１導通路」を構成している。   The large diameter portion 2A of the piston valve 2 is formed with a spring receiving recess 2a that opens into the back space 11A in the cylinder 11, and a piston spring 21 that contacts the lid member 3 is disposed in the spring receiving recess 2a. ing. Further, the piston valve 2 includes a lateral conduction path 2b that passes through the main valve portion 2B so as to be orthogonal to the axis L, a vertical conduction path 2c that is in the shape of a vertical hole that communicates with the lateral conduction path 2b, and the small conduction path 2c. A large conduction path 2d that opens to the spring receiving recess 2a is formed. The lateral conduction path 2b, the small conduction path 2c, the large conduction path 2d, the spring receiving recess 2a, and the clearance between the cylinder 11 and the piston valve 2 are electrically connected to the inlet port 12 (first port) and the back space 11A. It constitutes a “conduction path”.

電磁駆動部５は弁本体１の側部に設けられ、この電磁駆動部５はプランジャチューブ５１、プランジャ５２、吸引子５３、プランジャばね５４及び電磁コイル５５を備えている。弁本体１の下部には軸線Ｌと直角な方向に伸びる円筒部１Ｂが形成されており、この円筒部１Ｂ内にプランジャチューブ５１が嵌合固着され、プランジャチューブ５１内にプランジャ５２が摺動可能に内挿されている。円筒部１Ｂ内はパイロット弁室１Ｂ１となっており、このパイロット弁室１Ｂ１内に球形のパイロット弁４が内接され、パイロット弁４はプランジャ５２の端部に取り付けられている。   The electromagnetic drive unit 5 is provided on a side portion of the valve body 1, and the electromagnetic drive unit 5 includes a plunger tube 51, a plunger 52, an attractor 53, a plunger spring 54, and an electromagnetic coil 55. A cylindrical portion 1B extending in a direction perpendicular to the axis L is formed in the lower portion of the valve body 1, and a plunger tube 51 is fitted and fixed in the cylindrical portion 1B, and the plunger 52 is slidable in the plunger tube 51. Is interpolated. The cylindrical portion 1B has a pilot valve chamber 1B1. A spherical pilot valve 4 is inscribed in the pilot valve chamber 1B1, and the pilot valve 4 is attached to the end of the plunger 52.

また、弁本体１には、パイロット弁室１Ｂ１と出口ポート１４を連通するパイロットポート１５が形成されるとともに、パイロット弁室１Ｂ１と背空間１１Ａとを連通する均圧路１６が形成されている。すなわち、パイロットポート１５、パイロット弁室１Ｂ１及び均圧路１６は、出口ポート１４（第２ポート）と背空間１１Ａをパイロット弁４を介して導通可能な「第２導通路」を構成している。なお、パイロットポート１５の周囲はパイロット弁座１５ａとなっており、パイロット弁４はパイロット弁座１５ａに対して離座／着座することによりパイロットポート１５を開閉する。   The valve body 1 is formed with a pilot port 15 that communicates the pilot valve chamber 1B1 and the outlet port 14, and a pressure equalizing passage 16 that communicates the pilot valve chamber 1B1 and the back space 11A. That is, the pilot port 15, the pilot valve chamber 1 </ b> B <b> 1, and the pressure equalization path 16 constitute a “second conduction path” that can connect the outlet port 14 (second port) and the back space 11 </ b> A via the pilot valve 4. . The pilot port 15 is surrounded by a pilot valve seat 15a, and the pilot valve 4 opens and closes the pilot port 15 by being separated from / seated with respect to the pilot valve seat 15a.

以上の構成により、電磁駆動部５の電磁コイル５５に通電がなされると、プランジャ５２が吸引子５３に吸引され、パイロット弁４がパイロットポート１５を弁開状態とする。電磁コイル５５に通電がなされないと、プランジャばね５４の付勢力により、プランジャ５２が吸引子５３から離間し、パイロット弁４がパイロットポート１５を弁閉状態とする。   With the above configuration, when the electromagnetic coil 55 of the electromagnetic drive unit 5 is energized, the plunger 52 is attracted by the attractor 53 and the pilot valve 4 opens the pilot port 15. If the electromagnetic coil 55 is not energized, the urging force of the plunger spring 54 causes the plunger 52 to move away from the attractor 53 and the pilot valve 4 closes the pilot port 15.

順方向に冷媒を流すときに電磁駆動部５の電磁コイル５５に通電がなされ、パイロットポート１５を弁開状態とする。そして、この順方向の時は、入口ポート１２が高圧、出口ポート１４が低圧になる。また、出口ポート１４の低圧により、パイロットポート１５、パイロット弁室１Ｂ１及び均圧路１６を介して背空間１１Ａが低圧になる。また、入口ポート１２の高圧冷媒はピストン弁２の主弁部２Ｂの回りの底部側空間１１Ｂに供給される。したがって、底部側空間１１Ｂと背空間１１Ａとの差圧がピストン弁２に対して弁開方向に働き、ピストン弁２は主弁ポート１３の弁開状態を保持する。   When the refrigerant flows in the forward direction, the electromagnetic coil 55 of the electromagnetic drive unit 5 is energized, and the pilot port 15 is opened. In this forward direction, the inlet port 12 is at a high pressure and the outlet port 14 is at a low pressure. Further, due to the low pressure of the outlet port 14, the back space 11 </ b> A becomes low pressure via the pilot port 15, the pilot valve chamber 1 </ b> B <b> 1, and the pressure equalizing passage 16. The high-pressure refrigerant in the inlet port 12 is supplied to the bottom side space 11B around the main valve portion 2B of the piston valve 2. Therefore, the differential pressure between the bottom side space 11B and the back space 11A acts in the valve opening direction with respect to the piston valve 2, and the piston valve 2 maintains the valve open state of the main valve port 13.

また、入口ポート１２から前記第１導通路を介して背空間１１Ａに導入する流体よりも、背空間１１Ａから前記第２導通路を介して出口ポート１４に流出する流体の方が多くなるように、第１導通路と第２導通路は設定されている。これにより、背空間１１Ａの圧力はより低くなる。その結果、底部側空間１１Ｂと背空間１１Ａの差圧は大きくなる。したがって、ピストン弁２に対する弁開方向の力は大きくなる。   Further, the amount of fluid flowing out from the back space 11A to the outlet port 14 via the second conduction path is larger than the fluid introduced from the inlet port 12 to the back space 11A via the first conduction path. The first conduction path and the second conduction path are set. Thereby, the pressure of the back space 11A becomes lower. As a result, the differential pressure between the bottom side space 11B and the back space 11A increases. Therefore, the force in the valve opening direction with respect to the piston valve 2 is increased.

一方、逆方向に冷媒を流すときは電磁駆動部５の電磁コイル５５に通電しないで、パイロットポート１５を弁閉状態とする。この逆方向の時は、出口ポート１４が高圧、入口ポート１２が低圧になる。また、入口ポート１２の低圧により、横導通路２ｂ、小導通路２ｃ、大導通路２ｄ及びばね受け凹部２ａ介して背空間１１Ａが低圧になる。出口ポート１４の高圧冷媒の圧力は主弁ポート１３を介して主弁部２Ｂの下部に作用する。したがって、底部側空間１１Ｂと背空間１１Ａと差圧はなく共に低圧となり、出口ポート１４から主弁部２Ｂの下部に作用する圧力によってピストン弁２に対して弁開方向の力が働き、ピストン弁２は主弁ポート１３の弁開状態を保持する。   On the other hand, when flowing the refrigerant in the reverse direction, the pilot port 15 is closed without energizing the electromagnetic coil 55 of the electromagnetic drive unit 5. In the reverse direction, the outlet port 14 is at a high pressure and the inlet port 12 is at a low pressure. Further, due to the low pressure of the inlet port 12, the back space 11A becomes low pressure through the lateral conduction path 2b, the small conduction path 2c, the large conduction path 2d and the spring receiving recess 2a. The pressure of the high-pressure refrigerant at the outlet port 14 acts on the lower part of the main valve portion 2B via the main valve port 13. Accordingly, there is no differential pressure between the bottom side space 11B and the back space 11A, and both pressures are low, and a force acting in the valve opening direction acts on the piston valve 2 by the pressure acting on the lower portion of the main valve portion 2B from the outlet port 14, 2 holds the valve open state of the main valve port 13.

シリンダ１１が開口する弁本体１の端部１Ａの内周は円形である。蓋部材３は円盤状の形状である。そして、この弁本体１の端部１Ａの内周には「凹凸部」としての雌ねじ部１ａが形成され、蓋部材３の外周には「凹凸部」としての雄ねじ部３ａが形成されている。この蓋部材３の雄ねじ部３ａは弁本体１の雌ねじ部１ａに螺合する。また、蓋部材３の表面には軸線Ｌを中心とする円周上の２箇所にねじ締め用孔３ｂ，３ｂが形成され、さらに、裏面には背空間１１Ａの一部を構成する凹部３ｃが形成されている。   The inner periphery of the end portion 1A of the valve body 1 where the cylinder 11 opens is circular. The lid member 3 has a disk shape. An internal thread portion 1 a as an “uneven portion” is formed on the inner periphery of the end portion 1 A of the valve body 1, and an external thread portion 3 a as an “uneven portion” is formed on the outer periphery of the lid member 3. The male threaded portion 3 a of the lid member 3 is screwed into the female threaded portion 1 a of the valve body 1. Further, screw fastening holes 3b and 3b are formed at two locations on the circumference centering on the axis L on the surface of the lid member 3, and a recess 3c constituting a part of the back space 11A is formed on the back surface. Is formed.

そして、蓋部材３は、ねじ締め用孔３ｂ，３ｂに治具を係合して弁本体１の端部１Ａ内にねじ込み、この蓋部材３の裏面の縁が、端部１Ａの内周下端の段部１ｂに当接するまでねじ込むことにより、蓋部材３は弁本体１に固定されている。その後、弁本体１の端部１Ａの先端を該蓋部材３の中心側（軸線Ｌ側）にかしめることにより、蓋部材３でシリンダ１１と背空間１１Ａが閉塞されている。さらに、端部１Ａのかしめた先端部分と蓋部材３とが、ろう付けの一手段として半田３１により封止されている。これにより、シール性を保証できる。   Then, the lid member 3 is screwed into the end portion 1A of the valve body 1 by engaging a jig with the screw tightening holes 3b, 3b, and the edge of the back surface of the lid member 3 is the lower end of the inner periphery of the end portion 1A. The lid member 3 is fixed to the valve body 1 by being screwed in until it comes into contact with the step portion 1b. Thereafter, the cylinder 11 and the back space 11 </ b> A are closed by the lid member 3 by caulking the tip of the end portion 1 </ b> A of the valve body 1 to the center side (axis line L side) of the lid member 3. Further, the crimped tip portion of the end portion 1A and the lid member 3 are sealed with solder 31 as one means for brazing. Thereby, sealing performance can be guaranteed.

このように、弁本体１の端部１Ａの内周の雌ねじ部１ａと、蓋部材３の外周の雄ねじ部３ａとが互いに嵌合して蓋部材３が弁本体１の端部１ａに嵌め込まれ、かしめにより固定されているので、図２に矢印で示すように、シリンダ１１内の圧力により蓋部材３を軸線Ｌ方向に押す力は、雌ねじ部１ａと雄ねじ部３ａの嵌合部分において分散し、端部１Ａの先端のかしめ部への力の作用を抑えることができる。したがって、電磁弁の耐圧性が向上する。   In this way, the inner thread portion 1a of the inner periphery of the end portion 1A of the valve body 1 and the outer thread portion 3a of the outer periphery of the lid member 3 are fitted to each other, and the lid member 3 is fitted into the end portion 1a of the valve body 1. 2, the force pushing the lid member 3 in the direction of the axis L by the pressure in the cylinder 11 is dispersed in the fitting portion between the female screw portion 1a and the male screw portion 3a, as indicated by arrows in FIG. The action of force on the caulking portion at the tip of the end portion 1A can be suppressed. Therefore, the pressure resistance of the solenoid valve is improved.

図３は第２実施形態の電磁弁の要部を示す図であり、第１実施形態と同様な要素には図１及び図２と同符号を付記して詳細な説明は省略する。また、図示されていない部分の作用効果は第１実施形態と同様である。この第２実施形態と第１実施形態との違いは、第１実施形態では蓋部材３の裏面に凹部３ｃが形成されているが、この第２実施形態では、蓋部材３は平板状の形状をしている。この蓋部材３においても、その外周面に弁本体１の雌ねじ部１ａに螺合する雄ねじ部３ａが形成されるとともに、ねじ締め用孔３ｂ，３ｂが形成されている。この第２実施形態でも雌ねじ部１ａと雄ねじ部３ａの作用効果は第１実施形態と同様である。   FIG. 3 is a diagram showing a main part of the electromagnetic valve according to the second embodiment. Elements similar to those in the first embodiment are denoted by the same reference numerals as those in FIGS. 1 and 2, and detailed description thereof is omitted. In addition, the operational effects of portions not shown are the same as those in the first embodiment. The difference between the second embodiment and the first embodiment is that, in the first embodiment, a recess 3c is formed on the back surface of the lid member 3, but in this second embodiment, the lid member 3 has a flat plate shape. I am doing. Also in the lid member 3, a male screw portion 3a that is screwed into the female screw portion 1a of the valve body 1 is formed on the outer peripheral surface thereof, and screw fastening holes 3b and 3b are formed. Also in the second embodiment, the operational effects of the female screw portion 1a and the male screw portion 3a are the same as those of the first embodiment.

図４は第３実施形態の電磁弁の要部を示す図であり、第１実施形態と同様な要素には図１及び図２と同符号を付記して詳細な説明は省略する。また、図示されていない部分の作用効果は第１実施形態と同様である。この第３実施形態では、弁本体１の端部１Ａの内周に、凹部１ｄ１と凸部１ｄ２からなる凹凸部１ｄが形成され、蓋部材３の外周に、凹部３ｄ１と凸部３ｄ２からなる凹凸部３ｄが形成されている。この蓋部材３は弁本体１の端部１Ａに圧入したものであり、蓋部材３の凹凸部３ｄは弁本体１の凹凸部１ｄに嵌合している。なお、蓋部材３の凹凸部３ｄ及び弁本体１の凹凸部１ｄは前記軸線Ｌに対して回転対称な形状である。   FIG. 4 is a diagram showing a main part of the electromagnetic valve according to the third embodiment. Elements similar to those in the first embodiment are denoted by the same reference numerals as those in FIGS. 1 and 2, and detailed description thereof is omitted. In addition, the operational effects of portions not shown are the same as those in the first embodiment. In the third embodiment, an uneven portion 1d composed of a concave portion 1d1 and a convex portion 1d2 is formed on the inner periphery of the end portion 1A of the valve body 1, and an uneven portion composed of the concave portion 3d1 and the convex portion 3d2 is formed on the outer periphery of the lid member 3. Part 3d is formed. The lid member 3 is press-fitted into the end 1 </ b> A of the valve body 1, and the uneven portion 3 d of the lid member 3 is fitted to the uneven portion 1 d of the valve body 1. The uneven portion 3d of the lid member 3 and the uneven portion 1d of the valve body 1 are rotationally symmetric with respect to the axis L.

ここで、凹凸部１ｄ及び３ｄの傾斜面を説明するために、図示の「外側」と示した方向にある面を「外側面」、「内側」と示した方向にある面を「内側面」とする。凹部１ｄ１の外側面と凸部３ｄ２の外側面は、凸部１ｄ２の外側面及び凸部３ｄ２の内側面よりも軸線Ｌに対して大きく傾斜している。また、この凸部１ｄ２の外側面と凸部３ｄ２の内側面は軸線Ｌに略平行となるように軸線Ｌに対して小さく傾斜している。したがって、蓋部材３を弁本体１の端部１Ａに圧入するとき、凸部１ｄ２の外側面と凸部３ｄ２の内側面は圧接されるが、軸線Ｌに対して小さく傾斜しているので圧入することができる。なお、圧入するとき、弁本体１（端部１Ａ）を加熱膨張させると容易に圧入できる。   Here, in order to describe the inclined surfaces of the concave and convex portions 1d and 3d, the surface in the direction shown as “outside” in the drawing is “outside surface”, and the surface in the direction shown as “inside” is “inside surface”. And The outer surface of the concave portion 1d1 and the outer surface of the convex portion 3d2 are more greatly inclined with respect to the axis L than the outer surface of the convex portion 1d2 and the inner side surface of the convex portion 3d2. Further, the outer surface of the projection 1d2 and the inner surface of the projection 3d2 are slightly inclined with respect to the axis L so as to be substantially parallel to the axis L. Therefore, when the lid member 3 is press-fitted into the end 1A of the valve body 1, the outer surface of the convex portion 1d2 and the inner side surface of the convex portion 3d2 are pressed into contact with each other, but are press-fitted because they are slightly inclined with respect to the axis L. be able to. In addition, when press-fitting, if the valve main body 1 (end part 1A) is heated and expanded, it can be easily press-fitted.

この第３実施形態でも、シリンダ１１内の圧力により蓋部材３を軸線Ｌ方向に押す力により、蓋部材３の凸部３ｄ２の外側面と、端部１Ａの凹部１ｄ１の外側面とに抗力が働くので、この軸線Ｌ方向に押す力は、蓋部材３の凸部３ｄ２の外側面と、端部１Ａの凹部１ｄ１の外側面との当接部分にも分散し、端部１Ａの先端のかしめ部への力の作用を抑えることができる。したがって、電磁弁の耐圧性が向上する。   Also in the third embodiment, a force pushing the lid member 3 in the direction of the axis L by the pressure in the cylinder 11 causes a drag force on the outer surface of the convex portion 3d2 of the lid member 3 and the outer surface of the concave portion 1d1 of the end portion 1A. Therefore, the pressing force in the direction of the axis L is also distributed to the contact portion between the outer surface of the convex portion 3d2 of the lid member 3 and the outer surface of the concave portion 1d1 of the end portion 1A, and is caulked at the tip of the end portion 1A. The action of force on the part can be suppressed. Therefore, the pressure resistance of the solenoid valve is improved.

１ 弁本体
１Ａ 端部
１Ｂ 円筒部
１Ｂ１ パイロット弁室（第２導通路）
１ａ 雌ねじ部（凹凸部）
１ｄ 凹凸部
１１ シリンダ
１１ａ 底部
１１Ａ 背空間
１１Ｂ 底部側空間
１２ 入口ポート（第１ポート）
１３ 主弁ポート
１４ 出口ポート（第２ポート）
１５ パイロットポート（第２導通路）
１６ 均圧路（第２導通路）
２ ピストン弁
２ａ ばね受け凹部（第１導通路）
２ｂ 横導通路（第１導通路）
２ｃ 小導通路（第１導通路）
２ｄ 大導通路（第１導通路）
３ 蓋部材
３ａ 雄ねじ部（凹凸部）
３ｂ ねじ締め用孔
３ｃ 凹部
３ｄ 凹凸部
３１ 半田
４ パイロット弁
５ 電磁駆動部
５１ プランジャチューブ
５２ プランジャ
５３ 吸引子
５４ プランジャばね
５５ 電磁コイル
Ｌ 軸線 1 Valve body 1A End 1B Cylindrical portion 1B1 Pilot valve chamber (second conduction path)
1a Female thread (uneven portion)
1d Uneven part 11 Cylinder 11a Bottom part 11A Back space 11B Bottom side space 12 Inlet port (first port)
13 Main valve port 14 Outlet port (second port)
15 Pilot port (second conduction path)
16 Pressure equalization path (second conduction path)
2 Piston valve 2a Spring receiving recess (first conduction path)
2b Lateral conduction path (first conduction path)
2c Small conduction path (first conduction path)
2d Large conduction path (first conduction path)
3 Lid member 3a Male thread (uneven portion)
3b Screw tightening hole 3c Concave portion 3d Concavity and convexity portion 31 Solder 4 Pilot valve 5 Electromagnetic drive portion 51 Plunger tube 52 Plunger 53 Suction element 54 Plunger spring 55 Electromagnetic coil L Axis line

Claims (3)

弁本体に、シリンダと、該シリンダの底部側の側面に第１ポートが形成されるとともに、前記シリンダの底部に主弁ポートと第２ポートとが形成され、該シリンダ内に前記主弁ポートを開閉するピストン弁が配設され、前記シリンダが開口する弁本体の端部を蓋部材で閉塞することで前記ピストン弁に対する背空間が形成され、前記第１ポートと前記背空間を導通する第１導通路と、前記第２ポートと前記背空間をパイロット弁を介して導通可能な第２導通路と、前記弁本体の側部に設けられ前記パイロット弁を駆動する電磁駆動部とを備え、順方向及び逆方向の流体の流れにより、低圧側の第２ポートまたは第１ポートを前記背空間に導通して該背空間を低圧にするとともに、高圧側の第１ポートまたは第２ポートの高圧をピストン弁に作用させることで、該ピストン弁を作動させて主弁ポートを開とするようにした電磁弁において、
前記シリンダが開口する前記弁本体の端部の内周と、前記蓋部材の外周とに、互いに嵌合する凹凸部をそれぞれ設け、該凹凸部を嵌合させて該蓋部材を該弁本体の端部に嵌め込むとともに、該弁本体の端部の先端を該蓋部材の中心側にかしめることにより、該蓋部材で該シリンダを閉塞するようにしたことを特徴とする電磁弁。 The valve body has a cylinder and a first port formed on a side surface on the bottom side of the cylinder, and a main valve port and a second port formed on the bottom of the cylinder, and the main valve port is disposed in the cylinder. A piston valve that opens and closes is disposed, and a back space with respect to the piston valve is formed by closing an end of a valve body that the cylinder opens with a lid member, and the first port and the back space are electrically connected. A conduction path; a second conduction path capable of conducting the second port and the back space through a pilot valve; and an electromagnetic drive unit provided on a side portion of the valve body for driving the pilot valve. The flow of the fluid in the direction and in the opposite direction causes the second port or the first port on the low pressure side to conduct to the back space to lower the back space, and the high pressure on the first port or the second port on the high pressure side is increased. Acting on piston valve Be to, in the electromagnetic valve which is adapted to the main valve port open by operating the piston valve,
Provided on the inner periphery of the end of the valve body where the cylinder opens and the outer periphery of the lid member are respectively provided with concavo-convex portions that are fitted to each other, and the concavo-convex portions are fitted together so that the lid member is attached to the valve body. An electromagnetic valve characterized in that the cylinder is closed by the lid member by fitting into the end portion and caulking the tip of the end portion of the valve body toward the center side of the lid member. 前記弁本体の端部のかしめた先端部分と前記蓋部材とをろう付けにより封止するようにしたことを特徴とする請求項１に記載の電磁弁。   2. The electromagnetic valve according to claim 1, wherein the crimped tip portion of the end portion of the valve body and the lid member are sealed by brazing. 前記弁本体の端部の内周に形成された前記凹凸部が雌ねじ部であり、前記蓋部材の外周に形成された前記凹凸部が該雌ねじ部に螺合する雄ねじ部であり、該蓋部材の表面に前記軸線の回りに該蓋部材を回転可能にするねじ締め用孔が形成されていることを特徴とする請求項１または２に記載の電磁弁。   The concavo-convex portion formed on the inner periphery of the end of the valve body is a female screw portion, and the concavo-convex portion formed on the outer periphery of the lid member is a male screw portion screwed into the female screw portion, and the lid member The electromagnetic valve according to claim 1, wherein a screw tightening hole that allows the lid member to rotate about the axis is formed on a surface of the electromagnetic valve.
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CN104728509A (en) * 2013-12-18 2015-06-24 浙江三花股份有限公司 Solenoid valve and refrigeration system with same
CN117231757A (en) * 2023-11-08 2023-12-15 新乡市原隆航空设备有限公司 High-temperature-resistant zero-leakage electromagnetic valve and use method thereof

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CN104728509A (en) * 2013-12-18 2015-06-24 浙江三花股份有限公司 Solenoid valve and refrigeration system with same
CN117231757A (en) * 2023-11-08 2023-12-15 新乡市原隆航空设备有限公司 High-temperature-resistant zero-leakage electromagnetic valve and use method thereof
CN117231757B (en) * 2023-11-08 2024-01-26 新乡市原隆航空设备有限公司 High-temperature-resistant zero-leakage electromagnetic valve and use method thereof

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