JPS58100725A - Pressure sensor - Google Patents
Pressure sensorInfo
- Publication number
- JPS58100725A JPS58100725A JP19856781A JP19856781A JPS58100725A JP S58100725 A JPS58100725 A JP S58100725A JP 19856781 A JP19856781 A JP 19856781A JP 19856781 A JP19856781 A JP 19856781A JP S58100725 A JPS58100725 A JP S58100725A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- sensitive rubber
- bellows
- rubber
- holder
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/0033—Transmitting or indicating the displacement of bellows by electric, electromechanical, magnetic, or electromagnetic means
- G01L9/0035—Transmitting or indicating the displacement of bellows by electric, electromechanical, magnetic, or electromagnetic means using variations in ohmic resistance
Abstract
Description
【発明の詳細な説明】
本発明は冷凍サイクル内の冷媒圧力を検出する圧力セン
サに係り、時に冷媒圧力変化を連続的に検出できるよう
に構成した圧力センサに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pressure sensor for detecting refrigerant pressure within a refrigeration cycle, and more particularly to a pressure sensor configured to be able to continuously detect changes in refrigerant pressure.
従来の冷凍サイクル内の冷媒圧力を検出するのは、圧力
スイッチを使用している。ルームエアコンなどの制御を
する場合、冷媒圧縮機の運転状態が高効率運転となるよ
うに制御する必要がある。Detecting refrigerant pressure within a conventional refrigeration cycle uses a pressure switch. When controlling a room air conditioner, etc., it is necessary to control the operating state of the refrigerant compressor so that it operates with high efficiency.
そのため外気温度の変化に応じて送風機の風量・を変え
たり、冷凍サイクルを構成する冷媒回路を部分的、選択
的に細かく制御することが理想である。Therefore, it would be ideal to change the air volume of the blower in response to changes in outside air temperature, or to selectively and selectively control the refrigerant circuits that make up the refrigeration cycle.
近年マイクロコンピュータによる制御方式が盛んに採用
されてきているが、冷媒圧力の変化を検出するのは、従
来の圧力スイッチのみであり、検出できる圧力に一点で
ある。特別に一つのスイッチ［２つのスイッチ機構をと
り入れた特殊な圧力スイッチがあるが、組立て調節の手
数が掛り、コスト高であるうえ、多数の圧力変化を検出
しようと−ｔ′ｉ″Ｌば多くの圧力スイッチを必要とす
るので製品組立てが複雑となる。すなわち従来の冷凍サ
イクル内の圧力を検出するのは１〜２個のスイッチを有
する圧力スイッチであり、冷凍サイクル内の圧力変化を
連続的な電気信号として検出子ることができなかった。In recent years, control systems using microcomputers have been widely adopted, but only conventional pressure switches detect changes in refrigerant pressure, and only one point can be detected. There is a special pressure switch that incorporates a special one-switch (two-switch mechanism), but it takes time to assemble and adjust, is expensive, and requires a lot of effort to detect a large number of pressure changes. The product assembly is complicated because the pressure switch in the refrigeration cycle is detected by a pressure switch with one or two switches. It was not possible to detect the electric signal as a detector.
したがって、ルームエアコンなどを高効率運転に保持さ
せようとする際、多数の圧力スイッチを必要とし、製品
がコスト高となる欠点があった。捷だマイクロコンピュ
ータの入力信号として冷媒圧力挙動を連続的に検出する
ことによる致密な運転制御ができなかった。Therefore, when trying to maintain a room air conditioner or the like in highly efficient operation, a large number of pressure switches are required, which has the drawback of increasing the cost of the product. Close operation control could not be achieved by continuously detecting the refrigerant pressure behavior as an input signal to the microcomputer.
本発明の目的は冷凍サイクル内の圧力変化を連続的に検
出し、その圧力変化を電気信号に変換できる圧力センサ
を提供することにある。An object of the present invention is to provide a pressure sensor that can continuously detect pressure changes within a refrigeration cycle and convert the pressure changes into electrical signals.
本発明の特徴とするところは、圧力変化をベローの変位
に変換した後、ベローの変位を感圧ゴムに伝達し感圧ゴ
ム体の抵抗値変化に変換できることに着目し、無接点で
しかも圧力変化を連続的に検出できるように構成したこ
とである。The feature of the present invention is that after converting the pressure change into the displacement of the bellows, the displacement of the bellows can be transmitted to the pressure-sensitive rubber and converted into the resistance value change of the pressure-sensitive rubber body. The structure is such that changes can be detected continuously.
以下本発明の一実施例を第１図により説明する。An embodiment of the present invention will be described below with reference to FIG.
１は圧力検出部に接続するキャピラリチューブであり、
２はベローである。３Ｆｉ保護カバーであり、ベロー２
の外周は保護カバー３にロー付され、さらに保護カバー
３の外側にはキャピラリーチューブ１を接続し、保護カ
バー３を介しキャピラリーチューブ１の内部とベロー２
内は密閉空間を形成する。４は圧力センサーの外カバー
であり、保護カバー３はその周囲に設けた爪で、外カバ
ー４に固定する。５は弾性体６のホールダーであり、７
は電極板である。８１１″ｊ感圧ゴム９のホールダーで
あり、感圧ゴム９とホールダー８の間に電極板１０をは
さみ込むように組立てる。ホールダー５および８の表面
は絶縁処理を施こしである。電極板７および１０にはそ
れぞれ、リード線ａ、ｂを接続することにより、感圧ゴ
ム９の抵抗変化ｆ検出できるようにする。１１は圧力調
節ネジであり、ホールダ−８と接する側にバネ１２ｆ：
うける皿を有する。圧力調節ネジ１１は外カバー４にネ
ジ止めできるように固定し、圧力調節ネジ１１を回転さ
せることによりバネ１２の長さを変えることができる。1 is a capillary tube connected to the pressure detection part,
2 is bellows. 3Fi protective cover, Bellow 2
The outer periphery of the capillary tube 1 is brazed to the protective cover 3, and the capillary tube 1 is connected to the outside of the protective cover 3.
The inside forms a closed space. 4 is an outer cover of the pressure sensor, and the protective cover 3 is fixed to the outer cover 4 with claws provided around the protective cover 3. 5 is a holder for the elastic body 6;
is the electrode plate. 811''j This is a holder for the pressure sensitive rubber 9, and is assembled so that the electrode plate 10 is sandwiched between the pressure sensitive rubber 9 and the holder 8.The surfaces of the holders 5 and 8 are subjected to insulation treatment.The electrode plate 7 By connecting lead wires a and b to 10 and 10, respectively, it is possible to detect a resistance change f of the pressure sensitive rubber 9. 11 is a pressure adjustment screw, and a spring 12f is attached to the side in contact with the holder 8.
Have a dish to eat. The pressure adjustment screw 11 is fixed to the outer cover 4 so that it can be screwed, and the length of the spring 12 can be changed by rotating the pressure adjustment screw 11.
以上のように構成した、この一実施例の動作を説明する
。冷凍サイクルの圧力検出個所（図示せず）［キャピラ
リーチューブ１を接続することにより、圧力変化に応じ
てベロー２が伸縮する。圧力が高く・なるとバネ１２の
力に抗してホールダー５をバネ１２が縮む方向に押しつ
ける。この力で弾性体６と感圧ゴム９が圧縮される。感
圧ゴム体は圧縮されるとその内部抵抗が小さくなりリー
ド線ａ、ｂ間の抵抗は減少する。圧力が限界になるとホ
ールダ−５に設けたこ亡凸出部が対向するホールダー８
に突き当たるような寸法をとることにより、感圧ゴム体
９は一定の限界以上縮むことはない。また冷凍サイクル
の冷媒圧力が低くなるとベロー２はバネ１２の力で縮む
ことによりホールダー５はベロー側に押し戻され、感圧
ゴム体９の圧縮力は減少するので、その内部抵抗は大き
くなすＩＪ−ド線ａ、ｂ間の抵抗値は増大する。弾性体
６を感圧ゴム９より軟らかくすることにより、弾性体６
が十分圧縮されたのち感圧ゴム体を圧縮させるように干
ることができ、第２図に示すように圧力が小さいときの
感圧ゴム体の抵抗値変化を小さくシ、所定の圧力範囲Ａ
−Ｂ間で抵抗値変化を大きくとることができる。感圧
ゴム体の抵抗値検出端ａ、ｂを第３図に示すように接続
−ｆれば、圧力変化［伴なう感圧ゴム体の抵抗値変化を
電圧信号としてｃ、ｄ端子から連続的に検出することが
できる。ここでは感圧ゴム体９を第４図に示すような（
１）、（２）の圧力特性の異なる感圧ゴム体を貼り合せ
て構成′すれは圧力−抵抗特性は（Ｉｊと印の合成抵抗
となり所定の圧力範囲で直線性に干ぐれた特性とするこ
とが可能である。The operation of this embodiment configured as above will be explained. Pressure detection point of refrigeration cycle (not shown) [By connecting the capillary tube 1, the bellows 2 expands and contracts in response to pressure changes. When the pressure becomes high, the holder 5 is pressed against the force of the spring 12 in the direction in which the spring 12 contracts. This force compresses the elastic body 6 and the pressure sensitive rubber 9. When the pressure-sensitive rubber body is compressed, its internal resistance decreases, and the resistance between the lead wires a and b decreases. When the pressure reaches its limit, the collapsing protrusion provided on holder 5 moves to the opposing holder 8.
By taking the dimensions such that the pressure sensitive rubber body 9 touches the pressure sensitive rubber body 9, the pressure sensitive rubber body 9 will not shrink beyond a certain limit. Furthermore, when the refrigerant pressure in the refrigeration cycle becomes low, the bellows 2 contracts by the force of the spring 12, pushing the holder 5 back toward the bellows side, and the compressive force of the pressure-sensitive rubber body 9 decreases, so its internal resistance increases. The resistance value between the lead wires a and b increases. By making the elastic body 6 softer than the pressure sensitive rubber 9, the elastic body 6
After being sufficiently compressed, the pressure-sensitive rubber body can be dried so as to be compressed, and as shown in Fig. 2, the change in resistance value of the pressure-sensitive rubber body when the pressure is small is minimized, and the predetermined pressure range A is
-B can have a large change in resistance value. If the resistance value detection terminals a and b of the pressure-sensitive rubber body are connected as shown in Fig. 3 -f, the pressure change [accompanying resistance value change of the pressure-sensitive rubber body is converted into a voltage signal and continuous from terminals c and d] can be detected. Here, the pressure-sensitive rubber body 9 is used as shown in FIG.
1) and (2) are constructed by pasting together pressure-sensitive rubber bodies with different pressure characteristics.In this case, the pressure-resistance characteristic is the combined resistance of (Ij and the mark), which is a characteristic that is linear within a predetermined pressure range. Is possible.
本発明によルばベローと外カバーの間に感圧ゴムを挿入
しベローの変位を感圧ゴム体に伝達させるようにしたこ
とにより圧力変化を感圧ゴム体の力センサーでルームエ
アコンなどの運転状態全検出することが可能となり、マ
イクロコンピュータなどの入力信号を与えることができ
る。また感圧ゴム体９と弾性体６を接して配設するとと
もに圧力が一定以上大きくなったときホールグー５と８
が突き当たるように構成したことにより所定の圧力範囲
で抵抗値の直線性が得られバネ１２の調節範囲を小さく
とることができ、量産上の効果が犬である。さらに感圧
ゴム体を複数貼り合せて構成することができ為ので、合
成抵抗値を直線性の優れた特性にすることができ、圧力
検出精度を高める。こｂが期待できるとともに特性安定
化の効果がある。According to the present invention, pressure-sensitive rubber is inserted between the bellows and the outer cover, and the displacement of the bellows is transmitted to the pressure-sensitive rubber body, so that pressure changes can be detected by the force sensor of the pressure-sensitive rubber body, such as in room air conditioners. It is possible to detect all operating conditions and provide input signals to a microcomputer, etc. In addition, the pressure-sensitive rubber body 9 and the elastic body 6 are disposed in contact with each other, and when the pressure increases beyond a certain level, the holes 5 and 8
By configuring the springs 12 so that they touch each other, linearity of the resistance value can be obtained within a predetermined pressure range, and the adjustment range of the spring 12 can be made small, which is advantageous in terms of mass production. Furthermore, since a plurality of pressure-sensitive rubber bodies can be bonded together, the combined resistance value can be made to have excellent linearity, thereby increasing pressure detection accuracy. This can be expected to have the effect of stabilizing characteristics.
第１図は本発明による圧力センサーの縦断面図、第２図
は特性説明図、第３図に本圧力センサーを利用する電気
回路図、第４図に感圧ゴム体の合成抵抗を説明する図で
ある。
１・・・キャピラリーチューブ、２・・・ベロー、３・
・・保護カバー、４・・・外カバー、５・・・ホールグ
ー、６・・・弾性体、７・・・電極、８・・・ホールグ
ー、９・・・感圧コ゛ム、１０・・・電極、１１・・・
圧力調節ネジ、１２・・・ノくネ。
代理人弁理士 薄 １）利 幸
７メＧ臂−Fig. 1 is a longitudinal sectional view of the pressure sensor according to the present invention, Fig. 2 is a characteristic diagram, Fig. 3 is an electric circuit diagram using the pressure sensor, and Fig. 4 explains the combined resistance of the pressure-sensitive rubber body. It is a diagram. 1... Capillary tube, 2... Bellows, 3.
...protective cover, 4...outer cover, 5...hole goo, 6...elastic body, 7...electrode, 8...hole goo, 9...pressure sensitive comb, 10...electrode , 11...
Pressure adjustment screw, 12...kune. Representative Patent Attorney Susuki 1) Toshiyuki 7 Me G-
Claims (1)
換して圧力を検出する圧力センサにおいてベローと固定
枠の間に感圧ゴムを挿入し、ベロー変位を感圧ゴム体の
抵抗値変化として連続的に検出させるように構成したこ
とを特徴とする圧力センサ。 ２、感圧ゴム（９）の片側に接したホルダー（５）に凸
出部を設け、一定圧力以上の力がかかると凸出部が対向
して設けたホルダー（８）にあたるように配置し、ホル
ダー（８）は外カッ＜−（４）を押すように組立てるこ
とにより、感圧ゴム（９）に一定以上の圧力をかけない
ことを特徴とする特許請求の範囲第１項記載の圧力セン
サ。 ３、 ベロー（２）と感圧ゴム（９）の間に感圧ゴム（
９）より軟らかい弾性体（６）を配設するとともに、感
圧ゴム体（９）の両端に電極（７）（１０）を設けたこ
とを特徴とする特許請求の範囲第１項記載の圧力センサ
。 ４、 圧力変化に対する抵抗変化特性の異なる材料を多
層にして感圧ゴム体を構成し、圧力抵抗特性に直線性を
与えた特許請求の範囲第１項記載の圧力センサ。[Claims] 1. In a pressure sensor that detects pressure by converting pressure changes in the refrigeration cycle into bellows displacement, a pressure-sensitive rubber is inserted between the bellows and a fixed frame, and the bellows displacement is detected by the pressure-sensitive rubber. A pressure sensor characterized in that it is configured to continuously detect changes in body resistance. 2. A protrusion is provided on the holder (5) that is in contact with one side of the pressure-sensitive rubber (9), and the protrusion is arranged so that when a certain pressure or more is applied, the protrusion hits the holder (8) provided oppositely. , the holder (8) is assembled so as to press the outer cup <-(4) so as not to apply more than a certain pressure to the pressure-sensitive rubber (9). sensor. 3. Insert pressure sensitive rubber (
9) The pressure according to claim 1, characterized in that a softer elastic body (6) is provided and electrodes (7) and (10) are provided at both ends of the pressure sensitive rubber body (9). sensor. 4. The pressure sensor according to claim 1, wherein the pressure-sensitive rubber body is composed of multiple layers of materials having different resistance change characteristics with respect to pressure changes, and linearity is imparted to the pressure resistance characteristics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19856781A JPS58100725A (en) | 1981-12-11 | 1981-12-11 | Pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19856781A JPS58100725A (en) | 1981-12-11 | 1981-12-11 | Pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58100725A true JPS58100725A (en) | 1983-06-15 |
Family
ID=16393321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19856781A Pending JPS58100725A (en) | 1981-12-11 | 1981-12-11 | Pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58100725A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0346844U (en) * | 1989-09-14 | 1991-04-30 | ||
| WO2024023647A1 (en) * | 2022-07-28 | 2024-02-01 | 藤森工業株式会社 | Pressure measurement device, bioreactor, and culturing device |
-
1981
- 1981-12-11 JP JP19856781A patent/JPS58100725A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0346844U (en) * | 1989-09-14 | 1991-04-30 | ||
| WO2024023647A1 (en) * | 2022-07-28 | 2024-02-01 | 藤森工業株式会社 | Pressure measurement device, bioreactor, and culturing device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4328441A (en) | Output circuit for piezoelectric polymer pressure sensor | |
| US3748571A (en) | Pressure sensitive transducers employing capacitive and resistive variations | |
| US4262532A (en) | Pressure and temperature sensor | |
| US6006386A (en) | Capacitive transducer | |
| EP1068500A2 (en) | Linear force sensing device | |
| US4092696A (en) | Variable area capacitive pressure transducer with temperature compensation | |
| CN110597411A (en) | Pressure detection circuit, electronic device, and control method for pressure detection circuit | |
| JPS58100725A (en) | Pressure sensor | |
| US4104595A (en) | Signal translating circuit for variable area capacitive pressure transducer | |
| US7732722B1 (en) | Hermetically sealed pressure switch with composite actuation mechanism | |
| JPH0743625Y2 (en) | Capacitive load sensor | |
| US3904842A (en) | Pressure actuated electrical switch with centrally insulated contact portion | |
| US6556024B2 (en) | Capacitance type load sensor | |
| JP2896371B2 (en) | Pressure sensor | |
| JP3963830B2 (en) | Input means having an electrostatic sensor | |
| CN116659694A (en) | NTC temperature sensor and manufacturing method thereof | |
| CN110686808B (en) | Capacitive pressure sensor and electronic pen | |
| US3185903A (en) | Hermetically sealed variable capacitor | |
| CN111351596B (en) | Capacitance type sensor for measuring temperature | |
| JP2019106364A5 (en) | ||
| US4381503A (en) | Combination type fire detector | |
| WO2005066599A3 (en) | Modified dual diaphragm pressure sensor | |
| US2906840A (en) | Hermetically sealed thermostats | |
| JPH0318735A (en) | Pressure and temperature sensor element | |
| EP0252523A2 (en) | Temperature sensor |