JPH0797469B2 - Pressure switch with relief valve - Google Patents
Pressure switch with relief valveInfo
- Publication number
- JPH0797469B2 JPH0797469B2 JP15928586A JP15928586A JPH0797469B2 JP H0797469 B2 JPH0797469 B2 JP H0797469B2 JP 15928586 A JP15928586 A JP 15928586A JP 15928586 A JP15928586 A JP 15928586A JP H0797469 B2 JPH0797469 B2 JP H0797469B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- diaphragm
- switch
- piston
- chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Switches Operated By Changes In Physical Conditions (AREA)
Description
【発明の詳細な説明】 〔発明の目的〕 （産業上の利用分野） 本発明は、例えば自動車の空調装置などの限られた箇所
に取付けられるリリーフバルブ付き圧力スイッチに関す
る。DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Industrial field of application) The present invention relates to a pressure switch with a relief valve that is mounted in a limited place such as an air conditioner of an automobile.
（従来の技術） 従来の自動車の空調装置などに用いられる圧力スイッチ
とリリーフバルブとはそれぞれ別個に構成され、それぞ
れ独立して取付けられていた。(Prior Art) A pressure switch and a relief valve used in a conventional automobile air conditioner or the like are configured separately and are mounted independently of each other.
（発明が解決しようとする問題点） 上記従来の圧力スイッチとリリーフバルブとはそれぞれ
別個に構成されていたため、取付け工数が多く、また圧
力スイッチとリリーフバルブをそれぞれ取付けるスペー
スの確保が必要になり、被圧力制御本体の奥深い箇所に
取付けることが困難であるなどの問題を有している。(Problems to be Solved by the Invention) Since the conventional pressure switch and the relief valve are separately configured, the number of mounting steps is large, and it is necessary to secure a space for mounting the pressure switch and the relief valve, respectively. There is a problem that it is difficult to mount the pressure-controlled body at a deep place.
本発明は上記問題点に鑑みなされたもので、圧力スイッ
チとリリーフバルブとを一体構造として小形に組込むこ
とができ、取付けが容易で、かつ狭い箇所でも取付ける
ことのできるリリーフバルブ付き圧力スイッチを提供す
るものである。The present invention has been made in view of the above-mentioned problems, and provides a pressure switch with a relief valve, which allows a pressure switch and a relief valve to be assembled in a small size as an integrated structure, is easy to install, and can be installed even in a narrow place. To do.
（問題点を解決するための手段） 本発明の圧力スイッチは、一端に圧力検出用開口部１を
有するケース２と、このケース２内に前記圧力検出用開
口部１に対向して取付けられこの圧力検出用開口部１と
反対側にスイッチ室３を形成するダイアフラム４と、前
記スイッチ室３に進退自在に設けられ前記ダイアフラム
４に当接されるピストン５と、このピストン５と一体的
に前記スイッチ室３を進退されるホルダー６と、このホ
ルダー６を介して前記ピストン５を前記ダイアフラム４
に当接する方向に付勢するスプリング７と、前記スイッ
チ室３内に設けられた固定接点8,8と、前記ピストン５
の進退により前記固定接点8,8に接離される可動接点９
とを具備し、前記ケース２の圧力検出用開口部１の周縁
近傍に前記ダイアフラム４と対向して圧力室10を形成す
る弾性環体11を取付け、前記ダイアフラム４は弾性環体
11の当接する位置より外周側に前記圧力検出用開口部１
側とスイッチ室３を連通させるリリーフ用通孔12を形成
し、前記ケース２にスイッチ室３に連通するリリーフ用
開口部13を形成したことを特徴とするものである。(Means for Solving Problems) A pressure switch according to the present invention includes a case 2 having a pressure detecting opening 1 at one end, and a case 2 mounted inside the case 2 so as to face the pressure detecting opening 1. A diaphragm 4 that forms a switch chamber 3 on the side opposite to the pressure detection opening 1, a piston 5 that is provided in the switch chamber 3 so as to move back and forth, and is in contact with the diaphragm 4, and the piston 5 is integrated with the piston 5. A holder 6 which is moved forward and backward through the switch chamber 3, and the piston 5 which moves the diaphragm 5 through the holder 6.
Spring 7 for urging the piston 5 in the direction of abutting against the fixed contact 8, 8 provided in the switch chamber 3, and the piston 5
The movable contact 9 which is brought into contact with and separated from the fixed contacts 8 and 8 by moving back and forth
And an elastic ring body (11) that forms a pressure chamber (10) facing the diaphragm (4) is attached near the periphery of the pressure detection opening (1) of the case (2).
The pressure detecting opening 1 is provided on the outer peripheral side of the contact position of 11
A relief through hole 12 for communicating the side with the switch chamber 3 is formed, and a relief opening 13 for communicating with the switch chamber 3 is formed in the case 2.
（作用） 本発明のリリーフバルブ付き圧力スイッチは、被圧力制
御本体の制御内部の圧力変化はケース２の圧力検出用開
口部１に伝達され、ダイアフラム４がスプリング７に抗
してまたはスプリング７により進退され、被圧力制御本
体の制御内部の圧力の増加によりダイアフラム４がスプ
リング７に抗して押圧変形するすると、ピストン５が後
退し、可動接点９は固定接点8,8と離反されてスイッチ
は開放され圧力の上昇が検出される。また被圧力制御本
体の制御内部の圧力が低下すると、ダイアフラム４にか
かる圧力が減少し、スプリング７によってピストン５は
進出され、可動接点９は固定接点8,8に接触してスイッ
チは閉成される。そして被圧力制御本体の制御内部の圧
力が増加する際にダイアフラム４がスプリング７の付勢
力で弾性環体11に接触されているため、ダイアフラム４
の受圧面は弾性環体11にて形成される圧力室10の面積と
なるため、ピストン５の作動設定圧を高く設定でき、被
圧力制御本体の制御内部の圧力が設定圧より増加すると
ピストン５が作動され、このダイアフラム４が弾性環体
11から離反すると、圧力検出用開口部１の圧力がダイア
フラム４の全面に連通し、ダイアフラム４のリリーフ用
通孔12が圧力検出用開口部１に連通し、圧力流体はリリ
ーフ用通孔12からスイッチ室３を介してリリーフ用開口
部13に連通し、自動的に調圧される。(Operation) In the pressure switch with the relief valve of the present invention, the pressure change inside the control of the pressure controlled body is transmitted to the pressure detecting opening 1 of the case 2, and the diaphragm 4 resists the spring 7 or by the spring 7. When the diaphragm 4 is pushed forwards and backwards and the diaphragm 4 is pressed and deformed against the spring 7 due to the increase in the pressure inside the pressure-controlled body, the piston 5 is retracted, the movable contact 9 is separated from the fixed contacts 8 and 8, and the switch is turned off. It is released and an increase in pressure is detected. When the pressure inside the control of the pressure controlled body decreases, the pressure applied to the diaphragm 4 decreases, the piston 5 advances by the spring 7, the movable contact 9 contacts the fixed contacts 8 and 8, and the switch is closed. It Since the diaphragm 4 contacts the elastic ring body 11 by the urging force of the spring 7 when the pressure inside the control of the pressure controlled body increases, the diaphragm 4
Since the pressure receiving surface of is the area of the pressure chamber 10 formed by the elastic ring body 11, the operating set pressure of the piston 5 can be set high, and when the pressure inside the control of the pressure controlled body exceeds the set pressure, the piston 5 Is activated, and the diaphragm 4 is an elastic ring body.
When separated from 11, the pressure in the pressure detection opening 1 communicates with the entire surface of the diaphragm 4, the relief through hole 12 of the diaphragm 4 communicates with the pressure detection opening 1, and the pressure fluid flows from the relief through hole 12 The pressure is automatically adjusted by communicating with the relief opening 13 via the switch chamber 3.
（実施例） 次に本発明の一実施例の構成を図面について説明する。(Embodiment) Next, a configuration of an embodiment of the present invention will be described with reference to the drawings.
２はケースで、このケース２は第１のケース部材21と第
２のケース部材22とにて構成され、この第１のケース部
材21に第２のケース部材22をパッキング20を介して嵌合
してかしめ結合されている。そして前記第１のケース部
材21の一端に圧力検出用開口部１を有しこの圧力検出用
開口部１が被圧力制御本体に形成した圧力導入孔に連通
されるようになっている。そしてこのケース２内には前
記圧力検出用開口部１の内端側に空室23が形成され、こ
の空室23にダイアフラム４が取付けられ、このダイアフ
ラム４によって圧力検出用開口部１側に連通する受圧室
24が形成され、この受圧室24と反対側にスイッチ室３が
形成されている。このスイッチ室３に前記ダイアフラム
４に当接されるピストン５が前記ダイアフラム４に対し
て進退自在に設けられ、このピストン５は前記ダイアフ
ラム４に当接する方向にスプリング７にて付勢されてい
る。また前記受圧室24に臨ませて前記圧力検出用開口部
１の周縁近傍に前記ダイアフタム４が接触されるゴムな
どにて成型された弾性環体11が取付けられ、この弾性環
体11とダイアフラム４との接触でこの弾性環体11の内側
にダイアフラム４の全面より面積の狭い面積の圧力室10
が形成されるようになっている。さらにこのダイアフタ
ム４には第３図に示すように弾性環体11の当接する位置
より外周側に前記圧力検出用開口部１側とスイッチ室３
を連通させる複数のリリーフ用通孔12が形成されてい
る。Reference numeral 2 is a case, and the case 2 is composed of a first case member 21 and a second case member 22, and the second case member 22 is fitted to the first case member 21 via a packing 20. It is then caulked. A pressure detecting opening 1 is provided at one end of the first case member 21, and the pressure detecting opening 1 is communicated with a pressure introducing hole formed in the pressure controlled main body. An empty chamber 23 is formed inside the case 2 at the inner end side of the pressure detecting opening 1, and a diaphragm 4 is attached to the empty chamber 23. The diaphragm 4 communicates with the pressure detecting opening 1 side. Pressure receiving chamber
24 is formed, and the switch chamber 3 is formed on the side opposite to the pressure receiving chamber 24. A piston 5 that is brought into contact with the diaphragm 4 is provided in the switch chamber 3 so as to be movable back and forth with respect to the diaphragm 4, and the piston 5 is biased by a spring 7 in a direction in which the piston 5 comes into contact with the diaphragm 4. Further, an elastic ring body 11 formed of rubber or the like, which is brought into contact with the diaphragm 4 so as to face the pressure receiving chamber 24 and is in contact with the diaphragm 4 is attached, and the elastic ring body 11 and the diaphragm 4 are attached. By contact with the inside of the elastic ring body 11, the pressure chamber 10 having an area smaller than the entire surface of the diaphragm 4 is formed.
Are formed. Further, as shown in FIG. 3, the diaphragm 4 is provided with the pressure detecting opening 1 side and the switch chamber 3 on the outer peripheral side from the position where the elastic ring body 11 abuts.
A plurality of relief through holes 12 are formed to communicate the above.
また前記ケース２に設けられた一対の固定接点8,8にそ
れぞれ接離される環状の可動接点９を設けたホルダー６
が前記ピストン５に螺合して一体的に進退されるように
前記スイッチ室３に設けられ、このピストン５の進退に
より可動接点９が固定接点8,8に接離される。Further, a holder 6 provided with an annular movable contact 9 which is brought into contact with and separated from a pair of fixed contacts 8 provided on the case 2, respectively.
Is provided in the switch chamber 3 so as to be screwed into the piston 5 so as to be integrally advanced and retracted, and the movable contact 9 is brought into contact with and separated from the fixed contacts 8 and 8 as the piston 5 is advanced and retracted.
次にこの実施例の作用を説明する。Next, the operation of this embodiment will be described.
被圧力制御本体にケース２の圧力検出用開口部１を接続
連通させる。そして被圧力制御本体の制御内部の圧力変
化はケース２の圧力検出用開口部１に伝達され、ダイア
フラム４がスプリング７に抗してまたはスプリング７に
より進退される。第１図に示す状態から被圧力制御本体
の制御内部の圧力の増加によりダイアフラム４にスプリ
ング７の付勢力で弾性環体11が接触されており、ダイア
フラム４の全面積より狭い面積の圧力室10の圧力が増大
し、ダイアフラム４がスプリングに抗して押圧変形され
ると、第４図に示すOFF点でピストン５が後退し、可動
接点９は固定接点8,8から離反されてスイッチは開放さ
れ圧力の上昇が設定圧力より上昇したことが検出され
る。そして第２図に示すようにダイアフラム４が弾性環
体11から離反すると圧力検出用開口部１はダイアフラム
４のリリーフ用通孔12に連通され、圧力検出用開口部１
に掛る圧力流体はダイアフラム４のリリーフ用通孔21か
らスイッチ室３を経てケース２のリリーフ用開口部13か
ら流出され、第４図に示すリリーフ範囲で自動調圧され
る。また被圧力制御本体の制御内部の圧力が低下する
と、ダイアフラム４にかかる圧力が減少し、第４図に示
すON点でスプリング７によってピストン５は進出され、
可動接点９は固定接点8,8に接触してスイッチは閉成さ
れ、またダイアフラム４は弾性環体11に接触され、圧力
室10が形成されるようになっている。このように弾性環
体11がダイアフラム４と接触されることによりダイアフ
ラムの面積より狭い面積の圧力室10が形成され、ダイア
フラム４の全面を受圧面とした場合よりも設定圧力を高
く設定することができる。The pressure detection opening 1 of the case 2 is connected and communicated with the pressure-controlled body. Then, the pressure change inside the control of the pressure controlled main body is transmitted to the pressure detecting opening 1 of the case 2, and the diaphragm 4 is advanced or retracted against the spring 7 or by the spring 7. From the state shown in FIG. 1, the elastic ring body 11 is brought into contact with the diaphragm 4 by the urging force of the spring 7 due to the increase in the pressure inside the controlled body of the pressure controlled body, and the pressure chamber 10 having an area smaller than the entire area of the diaphragm 4 When the pressure of is increased and the diaphragm 4 is pressed and deformed against the spring, the piston 5 retracts at the OFF point shown in FIG. 4, the movable contact 9 is separated from the fixed contacts 8 and 8 and the switch is opened. Then, it is detected that the pressure rise exceeds the set pressure. Then, as shown in FIG. 2, when the diaphragm 4 separates from the elastic ring body 11, the pressure detecting opening 1 is communicated with the relief through hole 12 of the diaphragm 4, and the pressure detecting opening 1
The pressure fluid applied to is discharged from the relief through hole 21 of the diaphragm 4 through the switch chamber 3 to the relief opening 13 of the case 2 and is automatically pressure-controlled in the relief range shown in FIG. Further, when the pressure inside the control of the pressure controlled body decreases, the pressure applied to the diaphragm 4 decreases, and the piston 5 is advanced by the spring 7 at the ON point shown in FIG.
The movable contact 9 contacts the fixed contacts 8 and 8 to close the switch, and the diaphragm 4 contacts the elastic ring body 11 to form the pressure chamber 10. By thus contacting the elastic ring body 11 with the diaphragm 4, the pressure chamber 10 having an area smaller than the area of the diaphragm 4 is formed, and the set pressure can be set higher than when the entire surface of the diaphragm 4 is used as the pressure receiving surface. it can.
本発明によれば、圧力スイッチとリリーフバルブとを一
体構成にすることができ、しかもリリーフバルブ機能と
ともに自動調圧機能を有し、多機能圧力スイッチとする
ことができ、スイッチ構成が簡単で、小型化が可能とな
り、また圧力スイッチとリリーフバルブの取付けが簡単
で、被圧力制御本体の制御部に容易に取付けることがで
き、取付け作業性を向上できるものである。According to the present invention, the pressure switch and the relief valve can be integrally formed, and further, the relief valve function and the automatic pressure adjusting function can be provided, and the multifunctional pressure switch can be formed. The size can be reduced, and the pressure switch and the relief valve can be easily attached, and can be easily attached to the control unit of the pressure-controlled body, thereby improving the workability of the attachment.
第１図は本発明の一実施例を示すリリーフバルブ付き圧
力スイッチの断面図、第２図は同上受圧状態時の断面
図、第３図は同上ダイアフラムの平面図、第４図は同上
圧力スイッチの特性図である。 １……圧力検出用開口部、２……ケース、３……スイッ
チ室、４……ダイアフラム、５……ピストン、６……ホ
ルダー、７……スプリング、８……固定接点、９……可
動接点、10……圧力室、11……弾性環体、12……リリー
フ用通孔、13……リリーフ用開口部。FIG. 1 is a sectional view of a pressure switch with a relief valve showing an embodiment of the present invention, FIG. 2 is a sectional view of the same pressure receiving state, FIG. 3 is a plan view of the same diaphragm, and FIG. 4 is the same pressure switch. FIG. 1 ... Pressure detection opening, 2 ... Case, 3 ... Switch chamber, 4 ... Diaphragm, 5 ... Piston, 6 ... Holder, 7 ... Spring, 8 ... Fixed contact, 9 ... Movable Contact point, 10 ... Pressure chamber, 11 ... Elastic ring body, 12 ... Relief through hole, 13 ... Relief opening.
Claims (1)
と、このケース内に前記圧力検出用開口部に対向して取
付けられこの圧力検出用開口部と反対側にスイッチ室を
形成するダイアフラムと、前記スイッチ室に進退自在に
設けられ前記ダイアフラムに当接されるピストンと、こ
のピストンと一体的に前記スイッチ室を進退されるホル
ダーと、このホルダーを介して前記ピストンを前記ダイ
アフラムに当接する方向に付勢するスプリングと、前記
スイッチ室内に設けられた固定接点と前記ピストンの進
退により前記固定接点に接離される可動接点とを具備
し、 前記ケースの圧力検出用開口部の周縁近傍に前記ダイア
フラムと対向して圧力室を形成する弾性環体を取付け、
前記ダイアフラムは弾性環体の当接する位置より外周側
に前記圧力検出用開口部側とスイッチ室を連通させるリ
リーフ用通孔を形成し、前記ケースにスイッチ室に連通
するリリーフ用開口部を形成したことを特徴とするリリ
ーフバルブ付き圧力スイッチ。1. A case having a pressure detection opening at one end, and a diaphragm mounted inside the case so as to face the pressure detection opening and forming a switch chamber on the side opposite to the pressure detection opening. A piston that is movable in and out of the switch chamber and is in contact with the diaphragm; a holder that is integrally moved in and out of the switch chamber with the piston; and a direction in which the piston contacts the diaphragm through the holder. A diaphragm, a fixed contact provided inside the switch chamber, and a movable contact that is brought into contact with and separated from the fixed contact by advancing and retracting the piston, and the diaphragm near the peripheral edge of the pressure detecting opening of the case. Attach an elastic annulus that forms a pressure chamber facing the
The diaphragm has a relief through hole that communicates with the pressure detection opening side and the switch chamber on the outer peripheral side of the position where the elastic ring contacts, and the case has a relief opening that communicates with the switch chamber. A pressure switch with a relief valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15928586A JPH0797469B2 (en) | 1986-07-07 | 1986-07-07 | Pressure switch with relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15928586A JPH0797469B2 (en) | 1986-07-07 | 1986-07-07 | Pressure switch with relief valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62290028A JPS62290028A (en) | 1987-12-16 |
| JPH0797469B2 true JPH0797469B2 (en) | 1995-10-18 |
Family
ID=15690453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15928586A Expired - Lifetime JPH0797469B2 (en) | 1986-07-07 | 1986-07-07 | Pressure switch with relief valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0797469B2 (en) |
-
1986
- 1986-07-07 JP JP15928586A patent/JPH0797469B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62290028A (en) | 1987-12-16 |
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