JPS6238287Y2 - - Google Patents
Info
- Publication number
- JPS6238287Y2 JPS6238287Y2 JP1981084503U JP8450381U JPS6238287Y2 JP S6238287 Y2 JPS6238287 Y2 JP S6238287Y2 JP 1981084503 U JP1981084503 U JP 1981084503U JP 8450381 U JP8450381 U JP 8450381U JP S6238287 Y2 JPS6238287 Y2 JP S6238287Y2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- slider
- fixed
- contact
- movable
- 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
Links
- 239000012530 fluid Substances 0.000 claims description 5
- 230000002441 reversible effect Effects 0.000 claims description 2
- 230000007704 transition Effects 0.000 claims 1
- 239000003507 refrigerant Substances 0.000 description 16
- 238000001816 cooling Methods 0.000 description 10
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Switches Operated By Changes In Physical Conditions (AREA)
Description
【考案の詳細な説明】
一般にカークーラー或は空気調和機等の如く、
適宜の冷媒を用いて冷却を目的とする機器にあつ
ては、圧縮機−凝縮器−蒸発器−圧縮機の冷却回
路が形成されているが、冷凍負荷が大きい場合、
或は回路の目づまり等に依り凝縮器の冷却効率が
低下すると、冷却系統内の冷媒の高圧圧力が異常
に高くなる。このような場合は圧縮機に過負荷が
かかる丈でなく、甚しい時は配管に亀裂を生ずる
事もある。[Detailed explanation of the invention] Generally, like car coolers or air conditioners,
For equipment whose purpose is cooling using an appropriate refrigerant, a cooling circuit of compressor-condenser-evaporator-compressor is formed, but when the refrigeration load is large,
Alternatively, if the cooling efficiency of the condenser decreases due to clogging of the circuit, the high pressure of the refrigerant in the cooling system becomes abnormally high. In such cases, the length is not long enough to overload the compressor, and in severe cases, cracks may occur in the piping.
又冷媒がリークその他の理由で不足すると、冷
媒圧力が異常に低下するが、このような場合は圧
縮機が空運転をする事になり、圧縮機の故障の原
因となる。 Furthermore, if there is a shortage of refrigerant due to leakage or other reasons, the refrigerant pressure will drop abnormally, but in such a case, the compressor will run dry, causing a malfunction of the compressor.
以上の欠点を除去する為種々の圧力スイツチが
考案されたが高圧カツトオフと低圧カツトオフと
の為２個の圧力スイツチが必要となり冷却系統が
複雑となるばかりでなく、高価であつた。 Various pressure switches have been devised to eliminate the above drawbacks, but two pressure switches are required for high pressure cut-off and low pressure cut-off, which not only complicates the cooling system but also makes it expensive.
本案は以上の点に鑑み考案されたもので本案に
依れば、簡単な構造の１個の二動作形圧力スイツ
チで冷却系統内の冷媒の圧力が正常な時は閉じて
いるが圧力が異常に変動すると可動接点を固定接
点に対し急速に離間するようにしたものである。 This proposal was devised in view of the above points.According to this proposal, a single two-action pressure switch with a simple structure is closed when the refrigerant pressure in the cooling system is normal, but when the pressure is abnormal. When the contact point fluctuates, the movable contact is rapidly separated from the fixed contact.
以下図面に示す一実施例に就いて説明すると、
第１図はカークーラー等の冷却回路の概略を示す
もので、圧縮機１は電動機２に依つて駆動され
る。３は凝縮器、４は蒸発器を示し、５はこの凝
縮器と蒸発器との間に設置された二動作形圧力ス
イツチを示す。 One embodiment shown in the drawings will be explained below.
FIG. 1 schematically shows a cooling circuit for a car cooler or the like, in which a compressor 1 is driven by an electric motor 2. As shown in FIG. 3 is a condenser, 4 is an evaporator, and 5 is a two-acting pressure switch installed between the condenser and the evaporator.
従つて前記のように冷却系統内の冷媒の圧力が
異常に変動すると、二動作形圧力スイツチ５が作
動して電動機２を停止し、圧縮器の異常運転を阻
止する。 Therefore, when the pressure of the refrigerant in the cooling system fluctuates abnormally as described above, the two-acting pressure switch 5 is activated to stop the electric motor 2 and prevent the compressor from operating abnormally.
以下第２図イ，ロ，ハについて二動作形圧力ス
イツチの詳細を説明する。ケース１１内には２本
の固定端子１２，１３が埋設され負荷例えば電動
機２と接続されている。 The details of the two-action pressure switch will be explained below with reference to Fig. 2 A, B, and C. Two fixed terminals 12 and 13 are buried within the case 11 and connected to a load, such as an electric motor 2.
このケースは略円筒状をなし、内部に摺動子１
４が軸方向に摺動可能に設けられている。１５，
１６はこの摺動部材内に埋設された可動端子で後
述するように摺動子１４が摺動する事に依り前記
固定端子１２，１３と接離する。Ｓは摺動子とケ
ースとの間に設けられた空所Ａ内に介挿された可
調整のばねで常時冷媒の一定圧力以下では摺動子
１４をその弾力により図に於て下方に押圧してい
る。 This case has a substantially cylindrical shape, and there is a slider inside.
4 is provided so as to be slidable in the axial direction. 15,
Reference numeral 16 denotes a movable terminal embedded within this sliding member, which comes into contact with and separates from the fixed terminals 12 and 13 as the slider 14 slides, as will be described later. S is an adjustable spring inserted in the space A provided between the slider and the case, and when the pressure of the refrigerant is always below a certain level, the slider 14 is pushed downward in the figure by its elasticity. are doing.
可動端子１６はＺ字をなし、そのケース内の自
由端に固定接点１７を適宜手段に依り固定してい
る。又他の可動端子１５は逆Ｚ字状をなし、その
ケース内の自由端には支持板１８の一端を固定
し、その他端に前記固定接点に対接する可動接点
１９を固定する。 The movable terminal 16 has a Z-shape, and a fixed contact 17 is fixed to the free end within the case by appropriate means. The other movable terminal 15 has an inverted Z-shape, and one end of a support plate 18 is fixed to its free end inside the case, and a movable contact 19 that opposes the fixed contact is fixed to the other end.
２０はケース内に設けられ、後述する通路から
の冷媒を気密に遮断し、且つ冷媒の低圧圧力を感
知する機能を有するダイヤフラムで２１はこのダ
イヤフラムに接するストツパーを示す。又２２は
円形状をなし、冷媒の一定圧力以下では原形状を
なし、一定圧力になるとこの形状を変更して別の
形態に反転作用で移行する節動部材で、常時はス
トツパーと摺動棒２３との間に介在している。然
して摺動棒２３の両端は節動部材と支持板１８と
に接触し節動部材の形態変形による運動を支持板
に伝達している。２４はカバーＣに設けられた通
路で、第１図に示す冷媒の系統Ｌに連通してい
る。 Reference numeral 20 indicates a diaphragm which is provided in the case and has the function of airtightly blocking refrigerant from a passage described later and sensing the low pressure of the refrigerant. Reference numeral 21 indicates a stopper in contact with this diaphragm. Reference numeral 22 is an articulation member which is circular in shape and maintains its original shape when the pressure of the refrigerant is below a certain level, and changes this shape to another form by a reversal action when the pressure reaches a certain level. It is interposed between 23 and 23. Both ends of the sliding rod 23 are in contact with the articulation member and the support plate 18, and the movement caused by the deformation of the articulation member is transmitted to the support plate. 24 is a passage provided in the cover C, which communicates with the refrigerant system L shown in FIG.
２５は前記可調整のばねＳの図に於て下方でば
ねＳを受ける座で２６はケース内に螺合し、且頭
部はケース外に露出する調節用のねじで、その端
部は前記ばねの座２５に接している。 25 is a seat that receives the spring S at the lower side in the figure of the adjustable spring S; 26 is an adjustment screw that is screwed into the case and whose head is exposed outside the case; It is in contact with the spring seat 25.
次に本案二動作形圧力スイツチの作用について
説明する。今冷媒系統内の冷媒の圧力がリーク等
の理由に依り極端に下降し、例えば第２図イに示
すように２Kg／cm2以下になつたとすると、この時
可調整のばねＳの弾力を調節して２Kg／cm2以上に
しておけば、摺動子１４は、可調整のばねＳの弾
力に依り図に於て下降し、可動端子１５，１６は
摺動子と共に下降し固定端子１２，１３から離間
し、従つて電動機２を含む回路は遮断され圧縮機
１は停止し、処定の修理をすることが出来る。 Next, the operation of the dual-action pressure switch of the present invention will be explained. If the pressure of the refrigerant in the refrigerant system drops dramatically due to a leak or other reason, for example, to 2 kg/cm 2 or less as shown in Figure 2 A, then the elasticity of the adjustable spring S is adjusted. If the pressure is set to 2 kg/cm 2 or more, the slider 14 will be lowered as shown in the figure by the elasticity of the adjustable spring S, and the movable terminals 15 and 16 will be lowered together with the slider, and the fixed terminals 12 and 16 will be lowered together with the slider. 13 and thus the circuit containing the electric motor 2 is interrupted and the compressor 1 is stopped so that the prescribed repairs can be made.
今冷却系統の圧力が第２図ロに示すように２
Kg／cm2以上、27Kg／cm2以下である場合は通路２４
にかかる圧力は可調整のばねＳの弾力より強いが
節動部材２２の弾力よりも弱いから摺動子１４は
可調整のばねＳの弾力に坑して上昇するが節動部
材２２が反転するような事はない。従つて摺動子
１４のみがゆるく上昇し固定接点１７と可動接点
１９が閉じていると共に可動端子１５，１６と固
定端子１２，１３も閉じて居り電動機２がを含む
回路が閉じて、電動２が回動し、従つて圧縮機は
運転を続けている。 Now the pressure in the cooling system is 2 as shown in Figure 2B.
If it is more than Kg/cm 2 and less than 27Kg/cm 2 , please use the aisle 24.
Since the pressure applied to is stronger than the elasticity of the adjustable spring S but weaker than the elasticity of the articulated member 22, the slider 14 rises against the elasticity of the adjustable spring S, but the articulated member 22 is reversed. There is no such thing. Therefore, only the slider 14 slowly rises, the fixed contact 17 and the movable contact 19 are closed, and the movable terminals 15, 16 and the fixed terminals 12, 13 are also closed, and the circuit including the electric motor 2 is closed, and the electric motor 2 is closed. rotates, so the compressor continues to operate.
次に通路２４にかかる冷媒の圧力が目づまり等
の理由で第２図ハに示すように27Kg／cm2以上に達
すると、ストツパー２１はダイヤフラム２０を介
して急速に上昇し、この時節動部材２２を図に於
て中央を下方に急速に反転し、従つて摺動棒２３
も急速に図に於て上昇し、支持板１８を押圧す
る。 Next, when the pressure of the refrigerant applied to the passage 24 reaches 27 kg/cm 2 or more as shown in FIG. 22 in the figure, the center is rapidly reversed downward, and the sliding rod 23
The support plate 18 also rapidly rises in the figure and presses the support plate 18.
この為支持板は可動端子１５との接合点を中心
として時計方向に回動し、先端の可動接点１９は
可動接点１７より急速に離間する。従つて電動機
２を含む回路は遮断され、所定の修理をする事が
可能となる。 For this reason, the support plate rotates clockwise about the joint point with the movable terminal 15, and the movable contact 19 at the tip is separated more rapidly than the movable contact 17. Therefore, the circuit including the electric motor 2 is cut off, making it possible to carry out prescribed repairs.
然して今節調ねじ２６を調節することに依り可
調整のばねＳの弾力が変化するから、通路２４を
通る冷媒の圧力変動に依る固定端子と可動端子と
の接離を調節し得るものである。 Since the elasticity of the adjustable spring S changes by adjusting the adjustment screw 26, it is possible to adjust the contact and separation between the fixed terminal and the movable terminal due to pressure fluctuations of the refrigerant passing through the passage 24. .
以上のように本案二動作形圧力スイツチに依れ
ば１個の圧力スイツチで冷媒系統内の圧力の異常
変動に依り確実に負荷の接離を行い得るから従来
のものに比し遥かに冷却系統が簡潔となるもので
ある。 As described above, according to the dual-acting pressure switch of this invention, it is possible to reliably connect and disconnect the load in response to abnormal pressure fluctuations in the refrigerant system with just one pressure switch, so it is much easier to connect and disconnect the load in the cooling system than with conventional ones. is concise.
第１図は冷却器の慨略の系統図を、又第２図は
本案圧力端子の慨略の縦断面図でイは流体圧が所
定以下で開路状態を、ロは流体圧が所定値で閉路
状態を、又ハは流体圧が所定値以上で開路状態を
夫々示す。
１１……ケース、１２，１３……固定端子、１
４……摺動子、１５，１６……可動端子、１７…
…固定接点、１９……可動接点、２２……節動部
材、２３……摺動棒、２４……通路、Ｓ……可調
整のばね、Ｃ……カバー。
Figure 1 is a schematic system diagram of the cooler, and Figure 2 is a schematic vertical cross-sectional view of the pressure terminal in question. C indicates a closed circuit state, and C indicates an open circuit state when the fluid pressure is above a predetermined value. 11...Case, 12, 13...Fixed terminal, 1
4...Slider, 15, 16...Movable terminal, 17...
... Fixed contact, 19 ... Movable contact, 22 ... Joint member, 23 ... Sliding rod, 24 ... Passage, S ... Adjustable spring, C ... Cover.
Claims (1)
と、このケース内に摺動可能に設けられ且つ前記
固定端子に対向する一対の可動端子を有する摺動
子と、前記ケースを覆い圧力流体と連通する通路
を有するカバーと、前記摺動子とケースとの間に
設けられ圧力流体の一定圧力以下では摺動子を前
記通路側に押しつけるように作用する可調整のば
ねと、可動端子の一方に固定された固定接点と、
可動端子の他方に支持板を介して設けられ所定圧
力以下では常時この固定接点に接する可動接点
と、前記カバーと摺動子との間に設けられ、圧力
流体の一定圧力以下では原形状をなし、一定圧力
になるとこの形状を変更して別の形態に反転作用
で移行する節動部材と、前記固定端子とは反対側
に配置され、前記通路からの圧力流体を気密に遮
断し且つ低圧圧力を感知する機能を有するダイヤ
フラムと、このダイヤフラムと前記節動部材との
間に設けられたストツパーと、前記摺動子内を摺
動可能で一端が前記可動接点の支持板に接し、他
端が前記節動部材に接して、節動部材の形態変形
による運動を前記支持板に伝達する摺動棒とより
なる二動作形圧力スイツチ。 a case having a pair of fixed terminals connected to a load; a slider slidably provided within the case and having a pair of movable terminals facing the fixed terminals; and a slider covering the case and communicating with a pressure fluid. A cover having a passage, an adjustable spring provided between the slider and the case and acting to press the slider toward the passage when the pressure of the pressure fluid is below a certain pressure, and fixed to one of the movable terminals. fixed contacts,
A movable contact is provided on the other side of the movable terminal via a support plate and is always in contact with this fixed contact when the pressure is below a predetermined pressure, and the cover and the slider are provided, and the movable contact does not maintain its original shape when the pressure of the pressurized fluid is below a certain pressure. , an articulation member that changes its shape and transitions to another shape by a reversal action when a certain pressure is reached, and an articulating member that is disposed on the opposite side of the fixed terminal and that airtightly blocks pressure fluid from the passage and that has a low pressure. a diaphragm having a function of sensing the movement of the movable contact; a stopper provided between the diaphragm and the articulated member; A two-acting pressure switch comprising a sliding rod that is in contact with the articulated member and transmits movement due to shape deformation of the articulated member to the support plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981084503U JPS6238287Y2 (en) | 1981-06-09 | 1981-06-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981084503U JPS6238287Y2 (en) | 1981-06-09 | 1981-06-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57197146U JPS57197146U (en) | 1982-12-14 |
| JPS6238287Y2 true JPS6238287Y2 (en) | 1987-09-30 |
Family
ID=29879850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1981084503U Expired JPS6238287Y2 (en) | 1981-06-09 | 1981-06-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6238287Y2 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4832306U (en) * | 1971-08-18 | 1973-04-19 | ||
| JPS5230553U (en) * | 1975-08-23 | 1977-03-03 | ||
| JPS55109714A (en) * | 1979-02-17 | 1980-08-23 | Toru Nishikawa | Connector for extracting automotive oil |
| JPS62115U (en) * | 1985-06-18 | 1987-01-06 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4878364U (en) * | 1971-12-27 | 1973-09-27 |
-
1981
- 1981-06-09 JP JP1981084503U patent/JPS6238287Y2/ja not_active Expired
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4832306U (en) * | 1971-08-18 | 1973-04-19 | ||
| JPS5230553U (en) * | 1975-08-23 | 1977-03-03 | ||
| JPS55109714A (en) * | 1979-02-17 | 1980-08-23 | Toru Nishikawa | Connector for extracting automotive oil |
| JPS62115U (en) * | 1985-06-18 | 1987-01-06 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57197146U (en) | 1982-12-14 |
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