JP2020148253A - solenoid valve - Google Patents

solenoid valve Download PDF

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JP2020148253A
JP2020148253A JP2019045900A JP2019045900A JP2020148253A JP 2020148253 A JP2020148253 A JP 2020148253A JP 2019045900 A JP2019045900 A JP 2019045900A JP 2019045900 A JP2019045900 A JP 2019045900A JP 2020148253 A JP2020148253 A JP 2020148253A
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valve
plunger
urging
solenoid
diameter
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JP6924499B2 (en
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津久井 良輔
Ryosuke Tsukui
良輔 津久井
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株式会社不二工機
Fuji Koki Corp
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32Details
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/02Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0644One-way valve
    • F16K31/0655Lift valves

Abstract

To provide a solenoid valve that can increase a lift amount of a valve element without causing variation in the whole length or size of a valve body and performance of a minimum operation voltage, thereby increasing a flow rate and valve-opening holding pressure and suppressing valve wear due to repeated operations.SOLUTION: In a solenoid valve, a plunger 27 and a valve element 20 are arranged so as to be relatively movable in a lifting direction, and a valve-opening spring 25 for urging the valve element 20 upward (valve-opening direction) is interposed between the plunger 27 and the valve element 20.SELECTED DRAWING: Figure 1

Description

本発明は、電磁弁に係り、特に、弁体のリフト量が大きくされ、流量増加、開弁保持圧力上昇、耐久性向上等に寄与し得る電磁弁に関する。 The present invention relates to a solenoid valve, and more particularly to a solenoid valve which can contribute to an increase in flow rate, an increase in valve opening holding pressure, an improvement in durability, etc. by increasing the lift amount of the valve body.
従来、電磁コイルの磁力により弁体を弁シート(弁座)に対して昇降させて開閉動作を行う電磁弁はよく知られている。 Conventionally, a solenoid valve that opens and closes by raising and lowering a valve body with respect to a valve seat (valve seat) by the magnetic force of an electromagnetic coil is well known.
例えば特許文献1、2には、空気調和機の除湿(ドライ)運転時の冷媒を絞る除湿弁(ドライ弁)などとして使用される、いわゆる通電閉型(ノーマルオープンタイプ)の電磁弁が開示されている。 For example, Patent Documents 1 and 2 disclose a so-called energized closed type (normally open type) solenoid valve used as a dehumidifying valve (dry valve) for squeezing a refrigerant during dehumidifying (dry) operation of an air conditioner. ing.
特許文献1に所載の電磁弁は、一端が閉塞した筒状をなす弁本体と、この弁本体の一端側に摺動自在に収容されたプランジャと、このプランジャと対向するように弁本体の中央部に嵌着された吸引子と、この吸引子を貫通してプランジャに連結された弁体と、弁本体の他端側の開口を塞ぐとともに弁体により開閉される弁シートが形成された弁シート部材と、プランジャと吸引子との間に配設されて、弁体が弁シートから離れるように付勢するコイルスプリング(プランジャばね)と、このコイルスプリングのばね力に抗して弁体が弁シートを塞ぐように吸引子を励磁する電磁コイルとを備える。 The solenoid valve described in Patent Document 1 includes a tubular valve body having one end closed, a plunger slidably housed on one end side of the valve body, and a valve body so as to face the plunger. A suction element fitted in the central portion, a valve body penetrating the suction element and connected to the plunger, and a valve seat that closes the opening on the other end side of the valve body and is opened and closed by the valve body are formed. A coil spring (plunger spring) that is arranged between the valve seat member and the plunger and the suction element to urge the valve body to separate from the valve seat, and the valve body against the spring force of the coil spring. Is equipped with an electromagnetic coil that excites the attractor so as to close the valve seat.
また、特許文献2に所載の電磁弁は、小径部およびこの小径部に段部を介して接続する大径部を有する筒状をなす弁本体と、外周縁部が大径部の開口端部に接合される、弁シートを有する環状の弁シート部材と、小径部に対して摺動自在に嵌合されたプランジャを有し、このプランジャから弁シートと対向するように突出して弁シートを開閉し得る弁体と、弁本体の段部に固定される環状のばね受けと、このばね受けとプランジャとの間に介装されて弁シートから弁体が離れるように付勢する圧縮ばね(プランジャばね)と、小径部の開口を塞ぐように弁本体に嵌着された吸引子と、圧縮ばねのばね力に抗して弁体を弁シート側に駆動する電磁コイル等を有する。 Further, the solenoid valve described in Patent Document 2 has a tubular valve body having a small diameter portion and a large diameter portion connected to the small diameter portion via a step portion, and an open end having a large diameter portion on the outer peripheral edge portion. It has an annular valve seat member having a valve seat, which is joined to the portion, and a plunger slidably fitted to a small diameter portion, and the valve seat protrudes from the plunger so as to face the valve seat. A valve body that can be opened and closed, an annular spring receiver that is fixed to the step of the valve body, and a compression spring that is interposed between the spring receiver and the plunger and urges the valve body to separate from the valve seat ( It has a plunger spring), an aspirator fitted to the valve body so as to close the opening of the small diameter portion, and an electromagnetic coil that drives the valve body toward the valve seat side against the spring force of the compression spring.
特開2004−92664号公報Japanese Unexamined Patent Publication No. 2004-92664 特開2007−56954号公報JP-A-2007-56954
ところで、かかる電磁弁においては、弁体のリフト量(最大リフト量)が小さい場合、弁本体内の流量が少なくなるとともに、流入口側と流出口側の圧力差が生じやすく、弁体が流出口側(低圧側)に引き込まれて閉弁しやすくなるため、弁体のリフト量(最大リフト量)をある程度確保することが望まれる。 By the way, in such a solenoid valve, when the lift amount (maximum lift amount) of the valve body is small, the flow rate in the valve body is reduced and the pressure difference between the inflow port side and the outflow port side is likely to occur, so that the valve body flows. It is desirable to secure a certain amount of lift (maximum lift) of the valve body because it is easily pulled into the outlet side (low pressure side) and the valve is closed.
しかし、上記従来の電磁弁においては、通常、プランジャと弁体とがかしめ等で(相対移動不能に)連結されている。そのため、弁体のリフト量は、プランジャのリフト量によって規定されることになるが、プランジャのリフト量は、弁本体の全長・体格や最低作動電圧等で決められているため、プランジャのリフト量、すなわち、弁体のリフト量を大きくすることは難しい。 However, in the above-mentioned conventional solenoid valve, the plunger and the valve body are usually connected by caulking or the like (relatively immovable). Therefore, the lift amount of the valve body is determined by the lift amount of the plunger, but since the lift amount of the plunger is determined by the total length and physique of the valve body, the minimum operating voltage, etc., the lift amount of the plunger is determined. That is, it is difficult to increase the lift amount of the valve body.
また、上記従来の電磁弁においては、弁体がプランジャ吸引力をそのまま受け、閉弁時に弁体が弁シートに強く押し付けられるため、作動繰り返し等による弁摩耗が発生するおそれもある。 Further, in the above-mentioned conventional solenoid valve, the valve body receives the attractive force of the plunger as it is, and the valve body is strongly pressed against the valve seat when the valve is closed, so that valve wear may occur due to repeated operation or the like.
本発明は、上記事情に鑑みてなされたものであって、その目的とするところは、弁本体の全長・体格や最低作動電圧等の性能の変化を招くことなく、弁体のリフト量を大きくすることができ、もって、流量増加、開弁保持圧力上昇を図ることができるとともに、作動繰り返し等による弁摩耗を抑えることのできる電磁弁を提供することにある。 The present invention has been made in view of the above circumstances, and an object of the present invention is to increase the lift amount of the valve body without causing a change in performance such as the total length and physique of the valve body and the minimum operating voltage. It is an object of the present invention to provide a solenoid valve capable of increasing the flow rate, increasing the valve opening holding pressure, and suppressing valve wear due to repeated operation or the like.
前記した課題を解決すべく、本発明に係る電磁弁は、基本的に、側部及び底部に流入口及び流出口がそれぞれ開口せしめられ、前記流入口と前記流出口との間に弁シートが設けられた弁本体と、該弁本体に昇降可能に配在されたプランジャと、該プランジャに対向配置された吸引子と、該吸引子を励磁する電磁コイルと、前記プランジャに対して昇降方向に相対移動可能、かつ、前記弁シートに対して昇降可能に配在された弁体と、前記プランジャを開弁方向に付勢する第1付勢部材と、前記プランジャと前記弁体との間に介装されて前記弁体を開弁方向に付勢する第2付勢部材と、を備え、前記電磁コイルの通電により前記第1付勢部材の付勢力に抗して前記プランジャが閉弁方向に移動せしめられ、それに伴い、前記弁体が、前記弁本体内を流れる流体の流体力により前記第2付勢部材の付勢力に抗して閉弁方向に移動せしめられるようにされていることを特徴としている。 In order to solve the above-mentioned problems, in the solenoid valve according to the present invention, an inflow port and an outflow port are basically opened at the side and the bottom, respectively, and a valve sheet is provided between the inflow port and the outflow port. A valve body provided, a plunger arranged so as to be able to move up and down on the valve body, an attractor arranged facing the plunger, an electromagnetic coil for exciting the attractor, and an electromagnetic coil for exciting the attractor in the ascending / descending direction with respect to the plunger. A valve body that is relatively movable and that can be raised and lowered with respect to the valve seat, a first urging member that urges the plunger in the valve opening direction, and between the plunger and the valve body. A second urging member that is interposed to urge the valve body in the valve opening direction is provided, and the plunger is closed in the valve closing direction against the urging force of the first urging member by energization of the electromagnetic coil. The valve body is made to move in the valve closing direction against the urging force of the second urging member by the fluid force of the fluid flowing in the valve body. It is characterized by.
好ましい態様では、前記プランジャのリフト量は、前記弁体が全開位置にあるときの前記第2付勢部材の圧縮量より大きくされる。 In a preferred embodiment, the lift amount of the plunger is made larger than the compression amount of the second urging member when the valve body is in the fully open position.
他の好ましい態様では、前記弁体が全開位置にあるときの前記弁体の前記弁シートからのリフト量は、前記プランジャのリフト量より大きくされる。 In another preferred embodiment, the lift amount of the valve body from the valve seat when the valve body is in the fully open position is made larger than the lift amount of the plunger.
更に好ましい態様では、前記電磁コイルの通電により前記第1付勢部材の付勢力に抗して前記プランジャが閉弁方向に移動せしめられ、それに伴い、前記第2付勢部材の圧縮量が前記弁体が全開位置にあるときの前記第2付勢部材の圧縮量より大きくなるまで、前記弁体が、前記流体の流体力により前記第2付勢部材の付勢力に抗して閉弁方向に移動せしめられるようにされる。 In a more preferred embodiment, the energization of the electromagnetic coil causes the plunger to move in the valve closing direction against the urging force of the first urging member, and accordingly, the amount of compression of the second urging member is reduced to the valve. The valve body moves in the valve closing direction against the urging force of the second urging member by the fluid force of the fluid until it becomes larger than the compression amount of the second urging member when the body is in the fully open position. Be made to move.
別の好ましい態様では、前記弁体が全開位置にあるときの該弁体の下端部は、前記流入口より上側に位置せしめられる。 In another preferred embodiment, the lower end of the valve body when the valve body is in the fully open position is positioned above the inflow port.
別の好ましい態様では、前記弁本体の天井部に、前記プランジャ及び前記弁体の開弁方向移動限界を定めるストッパが設けられる。 In another preferred embodiment, the ceiling portion of the valve body is provided with a stopper that determines the valve opening direction movement limit of the plunger and the valve body.
別の好ましい態様では、前記弁本体の天井部に、前記プランジャの開弁方向移動限界を定めるストッパが設けられ、前記吸引子の下面に、前記弁体の開弁方向移動限界を定めるストッパが設けられる。 In another preferred embodiment, the ceiling portion of the valve body is provided with a stopper that determines the valve opening direction movement limit of the plunger, and the lower surface of the suction element is provided with a stopper that determines the valve opening direction movement limit of the valve body. Be done.
更に好ましい態様では、前記弁体における前記吸引子との接触面は、昇降方向に垂直に形成される。 In a more preferred embodiment, the contact surface of the valve body with the attractor is formed perpendicular to the elevating direction.
別の好ましい態様では、前記弁体に、前記弁シートに接離可能な下部大径弁体部が設けられるとともに、該下部大径弁体部の上面は円錐台面で構成される。 In another preferred embodiment, the valve body is provided with a lower large-diameter valve body portion that can be brought into contact with the valve seat, and the upper surface of the lower large-diameter valve body portion is formed of a conical base surface.
本発明の電磁弁では、プランジャと弁体とが昇降方向に相対移動可能に配在され、プランジャと弁体との間に弁体を開弁方向に付勢する付勢部材(例えば圧縮コイルばねからなる開弁ばね)が介装されるので、プランジャのリフト量を大きくすることなく、弁体のリフト量をプランジャのリフト量よりも大きくすることができる。そのため、プランジャと弁体とが相対移動不能に連結される従来のものに比べて、弁本体の全長・体格や最低作動電圧等の性能の変化を招くことなく、弁体のリフト量を大きくすることができ、もって、流量増加、開弁保持圧力上昇を図ることができる。 In the solenoid valve of the present invention, the plunger and the valve body are arranged so as to be relatively movable in the elevating direction, and an urging member (for example, a compression coil spring) that urges the valve body in the valve opening direction between the plunger and the valve body. Since the valve opening spring made of the above is interposed, the lift amount of the valve body can be made larger than the lift amount of the plunger without increasing the lift amount of the plunger. Therefore, the lift amount of the valve body is increased without causing a change in performance such as the total length and physique of the valve body and the minimum operating voltage, as compared with the conventional one in which the plunger and the valve body are connected so as to be relatively immovable. Therefore, it is possible to increase the flow rate and the valve opening holding pressure.
また、本発明の電磁弁では、閉弁時に弁体に作用する力は、弁本体内を流れる流体の流体力のみとなる。すなわち、弁体は、弁本体内の流体の流体力のみによって弁シートに押し付けられるため、作動繰り返し等による弁摩耗を抑えることもできる。 Further, in the solenoid valve of the present invention, the force acting on the valve body when the valve is closed is only the fluid force of the fluid flowing in the valve body. That is, since the valve body is pressed against the valve seat only by the fluid force of the fluid in the valve body, valve wear due to repeated operation or the like can be suppressed.
本発明に係る電磁弁の一実施形態の無通電時(全開状態)を示す縦断面図。The vertical sectional view which shows the non-energized state (fully open state) of one Embodiment of the solenoid valve which concerns on this invention. 本発明に係る電磁弁の一実施形態の通電オン時(閉弁途中状態)(その1)を示す縦断面図。The vertical sectional view which shows the energization on (the state in the process of closing a valve) (the 1) of one Embodiment of the solenoid valve which concerns on this invention. 本発明に係る電磁弁の一実施形態の通電オン時(閉弁途中状態)(その2)を示す縦断面図。The vertical sectional view which shows the energization on (the state in the process of closing a valve) (the 2) of one Embodiment of the solenoid valve which concerns on this invention. 本発明に係る電磁弁の一実施形態の通電オン時(閉弁状態)を示す縦断面図。The vertical sectional view which shows the energization on (the valve closed state) of one Embodiment of the solenoid valve which concerns on this invention. 図1に示される電磁弁の他例(その1)を示す縦断面図。A vertical cross-sectional view showing another example (No. 1) of the solenoid valve shown in FIG. 図1に示される電磁弁の他例(その2)を示す縦断面図。A vertical cross-sectional view showing another example (No. 2) of the solenoid valve shown in FIG.
以下、本発明の実施形態を図面を参照しながら説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
図1〜図4は、本発明に係る電磁弁の一実施形態を示す縦断面図であり、図1は無通電時(全開状態)、図2及び図3は通電オン時(閉弁途中状態)、図4は通電オン時(閉弁状態)を示している。 1 to 4 are vertical cross-sectional views showing an embodiment of the solenoid valve according to the present invention. FIG. 1 is a non-energized state (fully open state), and FIGS. 2 and 3 are a state in which the energization is on (a state in which the valve is closed). ), FIG. 4 shows when the energization is on (valve closed state).
なお、本明細書において、上下、左右等の位置、方向を表わす記述は、説明が煩瑣になるのを避けるために図面に従って便宜上付けたものであり、実際に使用された状態での位置、方向を指すとは限らない。 In addition, in this specification, the description indicating the position and direction such as up and down, left and right, etc. is added for convenience according to the drawing in order to avoid complicated explanation, and the position and direction in the actually used state. Does not always point to.
また、各図において、部材間に形成される隙間や部材間の離隔距離等は、発明の理解を容易にするため、また、作図上の便宜を図るため、各構成部材の寸法に比べて大きくあるいは小さく描かれている場合がある。 Further, in each drawing, the gap formed between the members, the separation distance between the members, etc. are larger than the dimensions of each constituent member in order to facilitate understanding of the invention and for convenience in drawing. Or it may be drawn small.
図示実施形態の電磁弁1は、空気調和機等の冷凍サイクルに使用されるのもので、天井部12a付き円筒状の小径部12A及び円環状の段部12Cを介して小径部12Aの下部に連なる大径部12Bからなる段付きのキャン12と、該キャン12の大径部12Bに下から嵌め込まれて溶接等により密封接合された鍔状部14C付き円筒状の弁シート部材14とで弁本体10が構成されている。弁シート部材14の上端部(の内周側)は、逆円錐面状のテーパ面からなる弁シート15となっており、この弁シート15に、後述する弁体20の下部大径弁体部21(詳しくは、その下端外周側に設けられた逆円錐面状のテーパ面)が接離するようになっている。 The solenoid valve 1 of the illustrated embodiment is used for a refrigerating cycle of an air conditioner or the like, and is located at a lower portion of the small diameter portion 12A via a cylindrical small diameter portion 12A with a ceiling portion 12a and an annular step portion 12C. A valve is formed by a stepped can 12 composed of a series of large diameter portions 12B and a cylindrical valve seat member 14 with a flange-shaped portion 14C that is fitted into the large diameter portion 12B of the can 12 from below and sealed and joined by welding or the like. The main body 10 is configured. The upper end portion (inner peripheral side) of the valve seat member 14 is a valve seat 15 having an inverted conical tapered surface, and the valve seat 15 has a lower large-diameter valve body portion of the valve body 20 described later. 21 (specifically, an inverted conical tapered surface provided on the outer peripheral side of the lower end thereof) is brought into contact with and separated from each other.
また、前記キャン12の大径部12Bの一側部には導管(継手)41が、また、弁シート部材14の下部(下部大径部)には導管(継手)42が、それぞれろう付け等により接合連結されている。本例では、導管41が流入口41a、導管42が流出口42aをそれぞれ形成しており、側方から視て、導管41(流入口41a)の中央やや下側に、弁シート部材14の上端部(弁シート15)が位置せしめられている。 Further, a conduit (joint) 41 is provided on one side of the large diameter portion 12B of the can 12, and a conduit (joint) 42 is attached to the lower portion (lower large diameter portion) of the valve seat member 14, respectively. It is joined and connected by. In this example, the conduit 41 forms the inflow port 41a and the conduit 42 forms the outflow port 42a, respectively, and when viewed from the side, the upper end of the valve seat member 14 is slightly below the center of the conduit 41 (inflow port 41a). The portion (valve sheet 15) is positioned.
また、本例では、閉弁状態(弁シート15に下部大径弁体部21が当接したとき)において冷媒を絞って導管41→導管42に導出するため、つまり、空気調和機において除湿(ドライ)運転を行う際の冷媒導出用絞り部として、前記弁シート15の複数箇所(図示例では、120°間隔で3箇所)に、所定深さ及び所定幅のV溝等からなるブリード溝(絞り溝ともいう)16が形成されている。 Further, in this example, in the valve closed state (when the lower large-diameter valve body portion 21 comes into contact with the valve seat 15), the refrigerant is squeezed and led out from the conduit 41 to the conduit 42, that is, dehumidified in the air conditioner ( A bleed groove (a bleed groove) having a predetermined depth and a predetermined width at a plurality of locations (three locations at 120 ° intervals in the illustrated example) of the valve seat 15 as a refrigerant derivation throttle portion during a dry operation. 16 (also referred to as a diaphragm groove) is formed.
前記キャン12の小径部12Aの下部には、固定鉄芯である吸引子26がかしめ固定やろう付け等により固着されている。この吸引子26、キャン12の大径部12B、及び弁シート部材14で弁室11が画成され、この弁室11に、後述する弁体20の下部大径弁体部21が位置せしめられている。 A suction element 26, which is a fixed iron core, is fixed to the lower portion of the small diameter portion 12A of the can 12 by caulking, fixing, brazing, or the like. The valve chamber 11 is defined by the suction element 26, the large diameter portion 12B of the can 12, and the valve seat member 14, and the lower large diameter valve body portion 21 of the valve body 20 described later is positioned in the valve chamber 11. ing.
本例では、前述したように、導管41が流入口41a、導管42が流出口42aをそれぞれ形成しており、前記弁室11の側部及び底部に、流出口41a及び流出口42aがそれぞれ開口せしめられ、流体(冷媒)は、導管41(流入口41a)から弁室11に流入し、導管41(流入口41a)と導管42(流出口42a)との間に配設された弁シート15(の内側)を通って導管42(流出口42a)に流出する。 In this example, as described above, the conduit 41 forms the inflow port 41a and the conduit 42 forms the outflow port 42a, respectively, and the outflow port 41a and the outflow port 42a are opened at the side and bottom of the valve chamber 11, respectively. The fluid (refrigerant) flows into the valve chamber 11 from the conduit 41 (inflow port 41a), and the valve seat 15 is arranged between the conduit 41 (inflow port 41a) and the conduit 42 (outlet 42a). It flows out to the conduit 42 (outlet 42a) through (inside).
また、本例では、前記吸引子26の下面(弁室11に対向する面)26bは、弁体20の(弁シート15からの)リフト量を確保すべく、弁室11内に位置せしめられる弁体20の下部大径弁体部21の上面(ここでは、円錐台面)と相補的な形状(ここでは、円錐台状)に形成されている。 Further, in this example, the lower surface (the surface facing the valve chamber 11) 26b of the suction element 26 is positioned in the valve chamber 11 in order to secure the lift amount (from the valve seat 15) of the valve body 20. It is formed in a shape (here, truncated cone shape) complementary to the upper surface (here, truncated cone surface) of the lower large diameter valve body portion 21 of the valve body 20.
一方、前記キャン12の小径部12Aの上部には、前記吸引子26と対向して、有底円筒状のプランジャ27が(昇降方向(軸線O方向)に)摺動自在に嵌挿されている。 On the other hand, a bottomed cylindrical plunger 27 is slidably fitted (in the elevating direction (axis O direction)) on the upper portion of the small diameter portion 12A of the can 12 so as to face the suction element 26. ..
また、本例では、弁体20は、前記吸引子26を貫通するようにして、弁シート部材14の弁シート15に対して昇降可能、かつ、プランジャ27に対して昇降方向(軸線O方向)に相対移動可能に配在されている(言い換えれば、弁体20とプランジャ27とが可動式とされている)。 Further, in this example, the valve body 20 can move up and down with respect to the valve seat 15 of the valve seat member 14 so as to penetrate the suction element 26, and the valve body 20 can move up and down with respect to the plunger 27 (axis O direction). The valve body 20 and the plunger 27 are movable (in other words, the valve body 20 and the plunger 27 are movable).
詳しくは、前記弁体20は、下側から、下部大径弁体部21、(上下方向に)比較的長い中間胴部22、及び上部小径嵌合部23を有する。前記下部大径弁体部21は、弁シート部材14の弁シート15に接離可能となるように弁室11内に昇降可能に配在され、前記中間胴部22は、吸引子26に設けられた貫通穴26a及びプランジャ27の底部に設けられた通し穴27aに(若干の隙間を持って昇降方向に相対移動可能に)挿通(内挿)され、前記上部小径嵌合部23は、プランジャ27の内側(円筒状空所)に位置せしめられている。 Specifically, the valve body 20 has a lower large-diameter valve body portion 21, a relatively long intermediate body portion 22 (in the vertical direction), and an upper small-diameter fitting portion 23 from the lower side. The lower large-diameter valve body portion 21 is arranged so as to be able to move up and down in the valve chamber 11 so as to be in contact with and detached from the valve seat 15 of the valve seat member 14, and the intermediate body portion 22 is provided in the suction element 26. It is inserted (interpolated) into the through hole 26a and the through hole 27a provided at the bottom of the plunger 27 (with a slight gap so that it can move relative to the elevating direction), and the upper small diameter fitting portion 23 is inserted into the plunger. It is located inside 27 (cylindrical space).
前記プランジャ27の内側に配在された上部小径嵌合部23には、中間胴部22より大径の円筒体で構成される嵌合部材24が外装されて固着(図示例では、かしめ部23aによるかしめ固定)されている。嵌合部材24(の下面)とプランジャ27(の底部の通し穴27a周り)との間には、圧縮コイルばねからなる開弁ばね(第2付勢部材)25が介装(縮装)されており、この開弁ばね25のばね力(付勢力)により、弁体20は上方(下部大径弁体部21を弁シート15から引き離す開弁方向)に付勢されている(後で詳述)。また、本例では、弁体20(の上部小径嵌合部23に設けられた嵌合部材24)の上端部は、キャン12の小径部12Aの天井部12a(の内周部分)に接当係止されるようになっており、キャン12の小径部12Aの天井部12aは、開弁ばね25の付勢力による弁体20の上方移動限界(上端位置)を定めるストッパとなっている。 A fitting member 24 composed of a cylindrical body having a diameter larger than that of the intermediate body portion 22 is externally fixed to the upper small-diameter fitting portion 23 arranged inside the plunger 27 (in the illustrated example, the caulking portion 23a). It is fixed by caulking). A valve opening spring (second urging member) 25 made of a compression coil spring is interposed (reduced) between the fitting member 24 (lower surface) and the plunger 27 (around the through hole 27a at the bottom). The valve body 20 is urged upward (in the valve opening direction that separates the lower large-diameter valve body portion 21 from the valve seat 15) by the spring force (urging force) of the valve opening spring 25 (detailed later). Description). Further, in this example, the upper end portion of the valve body 20 (the fitting member 24 provided in the upper small diameter fitting portion 23) is in contact with the ceiling portion 12a (inner peripheral portion) of the small diameter portion 12A of the can 12. It is locked, and the ceiling portion 12a of the small diameter portion 12A of the can 12 is a stopper that determines the upward movement limit (upper end position) of the valve body 20 by the urging force of the valve opening spring 25.
プランジャ27と吸引子26との間(かつ、中間胴部22の外周)には、圧縮コイルばねからなるプランジャばね(第1付勢部材)28が介装(縮装)されており、このプランジャばね28は、常時プランジャ27を上方(吸引子26から引き離す開弁方向)に付勢している。また、本例では、プランジャ27の上端部は、キャン12の小径部12Aの天井部12a(の外周部分)に接当係止されるようになっており、キャン12の小径部12Aの天井部12aは、プランジャばね28の付勢力によるプランジャ27の上方移動限界(上端位置)を定めるストッパとなっている。 A plunger spring (first urging member) 28 made of a compression coil spring is interposed (reduced) between the plunger 27 and the suction element 26 (and the outer periphery of the intermediate body portion 22). The spring 28 constantly urges the plunger 27 upward (in the valve opening direction to separate it from the suction element 26). Further, in this example, the upper end portion of the plunger 27 is contact-locked to the ceiling portion 12a (outer peripheral portion) of the small diameter portion 12A of the can 12, and the ceiling portion of the small diameter portion 12A of the can 12 is engaged. Reference numeral 12a is a stopper that determines an upward movement limit (upper end position) of the plunger 27 due to the urging force of the plunger spring 28.
すなわち、本例では、弁体20は、開弁ばね25の付勢力により上方(開弁方向)に移動せしめられてその上端部(詳しくは、上部小径嵌合部23に設けられた嵌合部材24の上端部)がキャン12の小径部12Aの天井部12aに接当係止され、下部大径弁体部21が弁シート部材14の弁シート15から離される上端位置(全開位置ともいう)と、開弁ばね25の付勢力に抗して下方(開弁方向)に移動せしめられて(後で詳述)、下部大径弁体部21が弁シート部材14の弁シート15に当接(着座)せしめられる下端位置(閉弁位置ともいう)との間で移動可能となっている。 That is, in this example, the valve body 20 is moved upward (in the valve opening direction) by the urging force of the valve opening spring 25, and the upper end portion (specifically, the fitting member provided in the upper small diameter fitting portion 23) is provided. The upper end position of the 24) is abutted and locked to the ceiling portion 12a of the small diameter portion 12A of the can 12, and the lower upper diameter valve body portion 21 is separated from the valve seat 15 of the valve seat member 14 at the upper end position (also referred to as a fully open position). Then, the lower large-diameter valve body portion 21 is moved downward (detailed later) against the urging force of the valve opening spring 25, and the lower large-diameter valve body portion 21 comes into contact with the valve seat 15 of the valve seat member 14. It is possible to move between the lower end position (also called the valve closing position) where the (seating) is tightened.
また、プランジャ27は、プランジャばね28の付勢力により上方(開弁方向)に移動せしめられてその上端部がキャン12の小径部12Aの天井部12aに接当係止せしめられる上端位置(離間位置ともいう)と、プランジャばね28の付勢力に抗して下方(閉弁方向)、換言すれば吸引子26側に引き寄せられる下端位置(吸引位置ともいう)との間で移動可能となっている。 Further, the plunger 27 is moved upward (valve opening direction) by the urging force of the plunger spring 28, and the upper end position thereof is abutted and locked to the ceiling portion 12a of the small diameter portion 12A of the can 12 (separation position). It is possible to move between (also referred to as) and the lower end position (also referred to as the suction position) that is attracted to the suction element 26 side in the downward direction (valve closing direction) against the urging force of the plunger spring 28. ..
前記キャン12(の小径部12A)の外周側には、電磁コイル30を構成するハウジング32、通電励磁用のコイル33、ボビン34等が取り付けられている。なお、ハウジング32の上部には、半球状凸部を有するストッパ35が固着されており、このストッパ35の半球状凸部をキャン12側に複数箇所(例えば4箇所)設けられた半球状の凹部のいずれかに嵌合させることにより、キャン12に対して電磁コイル30(ハウジング32、コイル33等)が位置決め固定される。 A housing 32 constituting the electromagnetic coil 30, a coil 33 for energizing, a bobbin 34, and the like are attached to the outer peripheral side of the can 12 (small diameter portion 12A). A stopper 35 having a hemispherical convex portion is fixed to the upper portion of the housing 32, and a hemispherical concave portion in which the hemispherical convex portion of the stopper 35 is provided at a plurality of locations (for example, four locations) on the can 12 side. The electromagnetic coil 30 (housing 32, coil 33, etc.) is positioned and fixed to the can 12 by fitting it in any of the above.
ここで、本実施形態では、図1に示される無通電時(全開状態)において、前記プランジャ27及び弁体20が前記上端位置をとるときに、プランジャ27の(吸引子26からの)リフト量(言い換えれば、プランジャ27のストローク量)は開弁ばね25の圧縮量より大きくなるように設定され、弁体20(の下部大径弁体部21)の(弁シート15からの)リフト量はプランジャ27の(吸引子26からの)リフト量(言い換えれば、プランジャ27のストローク量)より大きくなるように設定されている。また、このときの弁体20(の下部大径弁体部21)の下端部は、一側部に設けられた導管41(流入口41a)より多少上側に位置せしめられている。 Here, in the present embodiment, the lift amount (from the suction element 26) of the plunger 27 when the plunger 27 and the valve body 20 take the upper end position in the non-energized state (fully open state) shown in FIG. (In other words, the stroke amount of the plunger 27) is set to be larger than the compression amount of the valve opening spring 25, and the lift amount (from the valve seat 15) of the valve body 20 (lower large-diameter valve body portion 21) is set. It is set to be larger than the lift amount (in other words, the stroke amount of the plunger 27) of the plunger 27 (from the suction element 26). Further, the lower end portion of the valve body 20 (lower large-diameter valve body portion 21) at this time is positioned slightly above the conduit 41 (inflow port 41a) provided on one side portion.
かかる構成を有する電磁弁1において、コイル33に通電がなされない状態にあっては(無通電時)、図1に示される如くに、プランジャばね28及び開弁ばね25の付勢力により、プランジャ27及び弁体20は前記上端位置(キャン12の天井部12aに当接する位置)にあり、弁体20の下部大径弁体部21は弁シート部材14の弁シート15から離されている。したがって、冷媒は、弁室11を介して両導管41、42の間(詳しくは、導管41(流入口41a)→導管42(流出口42a))を流れることができる。 In the solenoid valve 1 having such a configuration, when the coil 33 is not energized (when not energized), as shown in FIG. 1, the plunger 27 is subjected to the urging force of the plunger spring 28 and the valve opening spring 25. The valve body 20 is located at the upper end position (position that abuts on the ceiling portion 12a of the can 12), and the lower large-diameter valve body portion 21 of the valve body 20 is separated from the valve seat 15 of the valve seat member 14. Therefore, the refrigerant can flow between the conduits 41 and 42 (specifically, the conduit 41 (inflow port 41a) → the conduit 42 (outlet 42a)) via the valve chamber 11.
図1に示される状態から、コイル33に通電されると(通電オン時)、コイル33から発せられる磁界により吸引子26及びプランジャ27が磁化され、プランジャ27はプランジャばね28の付勢力に抗して吸引子26側(下方)へ引き寄せられて(言い換えれば、閉弁方向に移動せしめられて)前記下端位置(吸引位置)をとる(図2に示される状態)。これに伴い、開弁ばね25には押圧力がかからなくなり、開弁ばね25は、前記圧縮量分だけ伸長されて自然長(無荷重状態)となる。それとともに、弁体20には開弁ばね25の付勢力が作用しなくなり、弁体20は、自重または弁室11(弁本体10内)を流れる流体の流体力により、その(嵌合部材24の)下面が自然長の開弁ばね25(の上端部)に当接するまで、下方(閉弁方向)へ移動せしめられる(図3に示される状態)。このとき、弁体20の下部大径弁体部21は弁シート部材14の弁シート15に当接しておらず(離間しており)、また、弁体20の下部大径弁体部21が弁シート部材14の弁シート15に近づくに従って、弁体20の下部大径弁体部21の上下で弁室11(弁本体10)を(流入口41aから流出口42aに向けて)流れる流体から受ける圧力差(昇降方向の圧力差)が次第に大きくなる。そのため、弁体20は、その弁室11(弁本体10)を流れる流体の流体力(流体による弁体20の下部大径弁体部21の上下の圧力差)により、開弁ばね25の付勢力に抗して更に下方(閉弁方向)へ移動せしめられ(言い換えれば、流出口42a側に引き込まれ)、閉弁ばね25の圧縮量が所定量(前記上端位置にあるときの圧縮量よりも大きい量)を超えると、弁体20の下部大径弁体部21が弁シート部材14の弁シート15に当接し、弁体20の下降が阻止されて閉弁状態となる(図4に示される状態)。したがって、プランジャ27及び弁体20は前記下端位置をとり、冷媒は、弁シート部材14の弁シート15に設けられたブリード溝16を通して両導管41、42の間(詳しくは、導管41(流入口41a)→導管42(流出口42a))流れるようになる。 From the state shown in FIG. 1, when the coil 33 is energized (when energization is on), the attractor 26 and the plunger 27 are magnetized by the magnetic field generated from the coil 33, and the plunger 27 resists the urging force of the plunger spring 28. It is attracted to the suction element 26 side (downward) (in other words, moved in the valve closing direction) and takes the lower end position (suction position) (state shown in FIG. 2). Along with this, no pressing force is applied to the valve opening spring 25, and the valve opening spring 25 is stretched by the amount of compression to reach its natural length (no load state). At the same time, the urging force of the valve opening spring 25 does not act on the valve body 20, and the valve body 20 is caused by its own weight or the fluid force of the fluid flowing through the valve chamber 11 (inside the valve body 10) (fitting member 24). The lower surface is moved downward (in the valve closing direction) until it abuts on (the upper end) of the naturally long valve opening spring 25 (state shown in FIG. 3). At this time, the lower large-diameter valve body 21 of the valve body 20 is not in contact with (separated from) the valve seat 15 of the valve seat member 14, and the lower large-diameter valve body 21 of the valve body 20 is not in contact with (separated from) the valve seat 15. From the fluid flowing through the valve chamber 11 (valve body 10) (from the inflow port 41a toward the outflow port 42a) above and below the lower large-diameter valve body portion 21 of the valve body 20 as the valve seat member 14 approaches the valve seat 15. The pressure difference received (pressure difference in the ascending / descending direction) gradually increases. Therefore, the valve body 20 is attached with the valve opening spring 25 due to the fluid force of the fluid flowing through the valve chamber 11 (valve body 10) (the pressure difference between the upper and lower parts of the lower large-diameter valve body portion 21 of the valve body 20 due to the fluid). It is moved further downward (in the valve closing direction) against the force (in other words, it is pulled toward the outlet 42a side), and the compression amount of the valve closing spring 25 is a predetermined amount (from the compression amount when it is at the upper end position). When the amount exceeds a large amount), the lower large-diameter valve body portion 21 of the valve body 20 comes into contact with the valve seat 15 of the valve seat member 14, and the lowering of the valve body 20 is prevented and the valve is closed (FIG. 4). State shown). Therefore, the plunger 27 and the valve body 20 take the lower end position, and the refrigerant passes between the conduits 41 and 42 through the bleed groove 16 provided in the valve seat 15 of the valve seat member 14 (specifically, the conduit 41 (inflow port). 41a) → Conduit 42 (outlet 42a)) Flows.
なお、図4に示される状態から、コイル33への通電がオフされると(通電オフ時)、プランジャばね28の付勢力により、プランジャ27は、(間に開弁ばね25を挟んで)弁体20を伴って上方(開弁方向)に移動せしめられて前記上端位置(離間位置)をとる。それとともに、弁体20(の下部大径弁体部21)に作用する流体の流体力(詳しくは、弁体20の下部大径弁体部21の上下で弁室11(弁本体10)を流入口41aから流出口42aに向けて流れる流体から受ける圧力差)が弱まるために、開弁ばね25の付勢力により、弁体20は上方(開弁方向)に移動せしめられて前記上端位置(全開位置)をとる。 When the energization of the coil 33 is turned off (when the energization is off) from the state shown in FIG. 4, the plunger 27 is valved (with the valve opening spring 25 sandwiched between them) by the urging force of the plunger spring 28. The body 20 is moved upward (in the valve opening direction) to take the upper end position (separation position). At the same time, the fluid force of the fluid acting on the valve body 20 (lower large-diameter valve body 21) (specifically, the valve chamber 11 (valve body 10) is moved above and below the lower large-diameter valve body 21 of the valve body 20. Since the pressure difference received from the fluid flowing from the inflow port 41a to the outflow port 42a is weakened, the valve body 20 is moved upward (valve opening direction) by the urging force of the valve opening spring 25 to the upper end position (the valve opening direction). Fully open position).
以上で説明したように、本実施形態の電磁弁1では、プランジャ27と弁体20とが昇降方向に相対移動可能に配在され、プランジャ27と弁体20との間に弁体20を上方(開弁方向)に付勢する開弁ばね25が介装されるので、プランジャ27のリフト量を大きくすることなく、弁体20のリフト量をプランジャ27のリフト量よりも大きくすることができる。そのため、プランジャと弁体とが相対移動不能に連結される従来のものに比べて、弁本体10の全長・体格や最低作動電圧等の性能の変化を招くことなく、弁体20のリフト量を大きくすることができ、もって、流量増加、開弁保持圧力上昇を図ることができる。 As described above, in the solenoid valve 1 of the present embodiment, the plunger 27 and the valve body 20 are arranged so as to be relatively movable in the elevating direction, and the valve body 20 is moved upward between the plunger 27 and the valve body 20. Since the valve opening spring 25 urging in the (valve opening direction) is interposed, the lift amount of the valve body 20 can be made larger than the lift amount of the plunger 27 without increasing the lift amount of the plunger 27. .. Therefore, the lift amount of the valve body 20 can be increased without causing a change in performance such as the total length and physique of the valve body 10 and the minimum operating voltage, as compared with the conventional one in which the plunger and the valve body are connected so as to be relatively immovable. It can be increased, so that the flow rate can be increased and the valve opening holding pressure can be increased.
また、本実施形態の電磁弁1では、閉弁時に弁体20に作用する力は、弁本体10内を流れる流体の流体力のみとなる。すなわち、弁体20は、弁本体10内の流体の流体力のみによって弁シート15に押し付けられるため、作動繰り返し等による弁摩耗を抑えることもできる。 Further, in the solenoid valve 1 of the present embodiment, the force acting on the valve body 20 when the valve is closed is only the fluid force of the fluid flowing in the valve body 10. That is, since the valve body 20 is pressed against the valve seat 15 only by the fluid force of the fluid in the valve body 10, valve wear due to repeated operation or the like can be suppressed.
なお、上記実施形態では、弁シート部材14の上端部(弁シート15)は、導管41(流入口41a)の中央付近(詳しくは、そのやや下側)に位置せしめられているが、例えば、図5に示される如くに、導管41(流入口41a)の下端付近に設定してもよい。この場合、弁体20(の下部大径弁体部21)の(弁シート15からの)リフト量が確保しやすくなるので、吸引子26の下面26bを、昇降方向(軸線O方向)に対して垂直な環状平坦面で形成してもよい。 In the above embodiment, the upper end portion (valve seat 15) of the valve seat member 14 is positioned near the center of the conduit 41 (inflow port 41a) (specifically, slightly below it). As shown in FIG. 5, it may be set near the lower end of the conduit 41 (inflow port 41a). In this case, since it is easy to secure the lift amount (from the valve seat 15) of the valve body 20 (lower large-diameter valve body portion 21), the lower surface 26b of the suction element 26 is moved in the elevating direction (axis O direction). It may be formed by a vertical annular flat surface.
また、上記実施形態では、弁本体10を構成するキャン12の天井部12aに、プランジャ27及び弁体20の上方移動限界を定めるストッパが設けられているが、例えば、図6に示される如くに、吸引子26の下面26bに、弁体20の上方移動限界を定めるストッパを設けてもよい。この場合、吸引子26と弁体20との接触面積を確保して耐久性を向上させるために、吸引子26の下面26b及び弁体20の下部大径弁体部21の上面(吸引子26の下面26bとの接触面)を、昇降方向(軸線O方向)に対して垂直な環状平坦面で形成してもよい。 Further, in the above embodiment, the ceiling portion 12a of the can 12 constituting the valve body 10 is provided with a stopper that determines the upward movement limit of the plunger 27 and the valve body 20, but as shown in FIG. 6, for example. , The lower surface 26b of the suction element 26 may be provided with a stopper that determines the upward movement limit of the valve body 20. In this case, in order to secure the contact area between the suction element 26 and the valve body 20 and improve the durability, the lower surface 26b of the suction element 26 and the upper surface of the lower large-diameter valve body portion 21 of the valve body 20 (aspirator 26). The contact surface with the lower surface 26b) may be formed by an annular flat surface perpendicular to the elevating direction (axis O direction).
なお、上記実施形態では、弁シート部材14の弁シート15側にブリード溝16が設けられているが、弁体20の下部大径弁体部21側に設けてもよいし、弁シート15と下部大径弁体部21の両方に設けてもよいことは勿論である。また、このブリード溝16は省略できることは当然である。 In the above embodiment, the bleed groove 16 is provided on the valve seat 15 side of the valve seat member 14, but it may be provided on the lower large diameter valve body portion 21 side of the valve body 20 or the valve seat 15. Of course, it may be provided on both of the lower large-diameter valve body portions 21. Further, it is natural that the bleed groove 16 can be omitted.
1 電磁弁
10 弁本体
11 弁室
12 キャン
12A 小径部
12a 天井部
12B 大径部
12C 段部
14 弁シート部材
14C 鍔状部
15 弁シート(弁座)
16 ブリード溝
20 弁体
21 下部大径弁体部
22 中間胴部
23 上部小径嵌合部
23a かしめ部
24 嵌合部材
25 開弁ばね(第2付勢部材)
26 吸引子
26a 貫通穴
26b 下面
27 プランジャ
27a 通し穴
28 プランジャばね(第1付勢部材)
30 電磁コイル
32 ハウジング
33 コイル
34 ボビン
35 ストッパ
41 導管
41a 流入口
42 導管
42a 流出口
1 Solenoid valve 10 Valve body 11 Valve chamber 12 Can 12A Small diameter part 12a Ceiling part 12B Large diameter part 12C Step part 14 Valve seat member 14C Collar 15 Valve seat (valve seat)
16 Bleed groove 20 Valve body 21 Lower large diameter valve body part 22 Intermediate body part 23 Upper small diameter fitting part 23a Caulking part 24 Fitting member 25 Valve opening spring (second urging member)
26 Attractor 26a Through hole 26b Bottom surface 27 Plunger 27a Through hole 28 Plunger spring (first urging member)
30 Electromagnetic coil 32 Housing 33 Coil 34 Bobbin 35 Stopper 41 Conduit 41a Inlet 42 Conduit 42a Outlet

Claims (9)

  1. 側部及び底部に流入口及び流出口がそれぞれ開口せしめられ、前記流入口と前記流出口との間に弁シートが設けられた弁本体と、
    該弁本体に昇降可能に配在されたプランジャと、
    該プランジャに対向配置された吸引子と、
    該吸引子を励磁する電磁コイルと、
    前記プランジャに対して昇降方向に相対移動可能、かつ、前記弁シートに対して昇降可能に配在された弁体と、
    前記プランジャを開弁方向に付勢する第1付勢部材と、
    前記プランジャと前記弁体との間に介装されて前記弁体を開弁方向に付勢する第2付勢部材と、を備え、
    前記電磁コイルの通電により前記第1付勢部材の付勢力に抗して前記プランジャが閉弁方向に移動せしめられ、それに伴い、前記弁体が、前記弁本体内を流れる流体の流体力により前記第2付勢部材の付勢力に抗して閉弁方向に移動せしめられるようにされていることを特徴とする電磁弁。
    A valve body in which inlets and outlets are opened at the side and bottom, respectively, and a valve sheet is provided between the inlet and the outlet.
    A plunger that can be raised and lowered on the valve body,
    With the aspirator placed opposite to the plunger,
    An electromagnetic coil that excites the attractor and
    A valve body that can move relative to the plunger in the ascending / descending direction and that can be moved up / down with respect to the valve seat.
    The first urging member that urges the plunger in the valve opening direction, and
    A second urging member, which is interposed between the plunger and the valve body and urges the valve body in the valve opening direction, is provided.
    By energizing the solenoid coil, the plunger is moved in the valve closing direction against the urging force of the first urging member, and the valve body is moved by the fluid force of the fluid flowing in the valve body. A solenoid valve characterized in that it is made to move in the valve closing direction against the urging force of the second urging member.
  2. 前記プランジャのリフト量は、前記弁体が全開位置にあるときの前記第2付勢部材の圧縮量より大きくされていることを特徴とする請求項1に記載の電磁弁。 The solenoid valve according to claim 1, wherein the lift amount of the plunger is larger than the compression amount of the second urging member when the valve body is in the fully open position.
  3. 前記弁体が全開位置にあるときの前記弁体の前記弁シートからのリフト量は、前記プランジャのリフト量より大きくされていることを特徴とする請求項1又は2に記載の電磁弁。 The solenoid valve according to claim 1 or 2, wherein the lift amount of the valve body from the valve seat when the valve body is in the fully open position is larger than the lift amount of the plunger.
  4. 前記電磁コイルの通電により前記第1付勢部材の付勢力に抗して前記プランジャが閉弁方向に移動せしめられ、それに伴い、前記第2付勢部材の圧縮量が前記弁体が全開位置にあるときの前記第2付勢部材の圧縮量より大きくなるまで、前記弁体が、前記流体の流体力により前記第2付勢部材の付勢力に抗して閉弁方向に移動せしめられるようにされていることを特徴とする請求項3に記載の電磁弁。 By energizing the electromagnetic coil, the plunger is moved in the valve closing direction against the urging force of the first urging member, and accordingly, the amount of compression of the second urging member causes the valve body to be in the fully open position. The valve body is moved in the valve closing direction against the urging force of the second urging member by the fluid force of the fluid until it becomes larger than the compression amount of the second urging member at a certain time. The solenoid valve according to claim 3, wherein the solenoid valve is made.
  5. 前記弁体が全開位置にあるときの該弁体の下端部は、前記流入口より上側に位置せしめられていることを特徴とする請求項1から4のいずれか一項に記載の電磁弁。 The solenoid valve according to any one of claims 1 to 4, wherein the lower end portion of the valve body when the valve body is in the fully open position is positioned above the inflow port.
  6. 前記弁本体の天井部に、前記プランジャ及び前記弁体の開弁方向移動限界を定めるストッパが設けられていることを特徴とする請求項1から5のいずれか一項に記載の電磁弁。 The solenoid valve according to any one of claims 1 to 5, wherein a stopper for determining a valve opening direction movement limit of the plunger and the valve body is provided on the ceiling portion of the valve body.
  7. 前記弁本体の天井部に、前記プランジャの開弁方向移動限界を定めるストッパが設けられ、前記吸引子の下面に、前記弁体の開弁方向移動限界を定めるストッパが設けられていることを特徴とする請求項1から5のいずれか一項に記載の電磁弁。 The ceiling of the valve body is provided with a stopper that determines the valve opening direction movement limit of the plunger, and the lower surface of the suction element is provided with a stopper that determines the valve opening direction movement limit of the valve body. The solenoid valve according to any one of claims 1 to 5.
  8. 前記弁体における前記吸引子との接触面は、昇降方向に垂直に形成されていることを特徴とする請求項7に記載の電磁弁。 The solenoid valve according to claim 7, wherein the contact surface of the valve body with the attractor is formed perpendicular to the elevating direction.
  9. 前記弁体に、前記弁シートに接離可能な下部大径弁体部が設けられるとともに、該下部大径弁体部の上面は円錐台面で構成されていることを特徴とする請求項1から8のいずれか一項に記載の電磁弁。
    According to claim 1, the valve body is provided with a lower large-diameter valve body portion that can be brought into contact with the valve seat, and the upper surface of the lower large-diameter valve body portion is formed of a conical base surface. The solenoid valve according to any one of 8.
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