CN102903571A - Low-middle-high triple-pressure switch of automobile air conditioner - Google Patents
Low-middle-high triple-pressure switch of automobile air conditioner Download PDFInfo
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- CN102903571A CN102903571A CN201210427281XA CN201210427281A CN102903571A CN 102903571 A CN102903571 A CN 102903571A CN 201210427281X A CN201210427281X A CN 201210427281XA CN 201210427281 A CN201210427281 A CN 201210427281A CN 102903571 A CN102903571 A CN 102903571A
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Abstract
The invention discloses a low-middle-high triple-pressure switch of an automobile air conditioner, comprising a shell, a pressure cavity, four contacts and wiring terminals, three movable contacts, three pre-tightening springs, two force-transferring springs, a spring bracket, a diaphragm with an insulating push rod, a middle fixed contact and an insulating spacer, wherein the fourth contact, the wiring terminals and the middle fixed contact are arranged in a cross manner; the casting material of the shell is used for fixing the four contacts, the wiring terminals and the middle fixed contact; small holes are arranged at the centers of the first movable contact and the second movable contact, and the diameter of each small hole is slightly larger than the outer diameter of the insulating push rod of the diaphragm with the insulating push rod, so that the insulating push rod can pass through the small holes freely; and the spring bracket and the diaphragm with the insulating push rod are fixedly connected. The low-middle-high triple-pressure switch disclosed by the invention overcomes the defects of complex structure, easy leakage of refrigerants and high cost in the existing pressure switch of the automobile air conditioner, and is novel in structure.
Description
Technical field
The present invention relates to a kind of pressure switch, particularly the basic, normal, high pressure triple burden of a kind of air conditioning for automobiles switch.
Background technology
In air-conditioning refrigeration system, pressure switch is installed in the cold-producing medium cycle of higher pressure pipeline, detects the pressure of cooling cycle system, starts corresponding protective circuit when pressure anomaly, prevents from causing the damage of system.Common pressure switch mainly contains high-voltage switch gear, low tension switch, Medium voltage switch or circuit breaker etc.When loine pressure excessively low; as when being lower than 0.2MPa; can cause the compressor of air conditioner dry grinding and earlier period damage; too high when system pressure, as be higher than 3MPa, then can cause pipelines from bursting; therefore; the low tension switch of automobile air conditioning refrigerating system, high-voltage switch gear often are connected in the electromagnetic clutch circuit of compressor, when hypertonia or cross and to cut off the electromagnetic clutch for compressor circuit when low, compressor are shielded.Higher as working as loine pressure, as when being higher than 2.2MPa and being lower than 3MPa, higher reason may be because bad the causing of condenser heat radiation need to be strengthened heat radiation to condenser, Medium voltage switch or circuit breaker is then connected the cooling fan top gear to strengthen the heat radiation of condenser, and is higher to prevent pressure.The low tension switch of traditional air-conditioning refrigeration system, high-voltage switch gear, Medium voltage switch or circuit breaker are installed separately, and pressure switch is installed separately has increased manufacturing cost, have also increased leakage point and failure rate.
Summary of the invention
For above-mentioned prior art, technical problem to be solved by this invention provide a kind of simple in structure, leakage point is few, failure rate is low and the little basic, normal, high pressure triple burden of the air conditioning for automobiles switch of manufacturing cost.
For solving the problems of the technologies described above, the basic, normal, high pressure triple burden of a kind of air conditioning for automobiles of the present invention switch comprises housing and pressure chamber, and the top of housing is equipped with joint, the joint top exterior walls is provided with connecting thread, is provided with the ostium that passes into pressure source at the joint top.This triple burden switch also comprises the 1st contact and binding post, the 2nd contact and binding post, the 3rd contact and binding post, the 4th contact and binding post, the 1st armature contact, the 2nd armature contact, the 3rd armature contact, the 1st preloading spring, the 2nd preloading spring, the 3rd preloading spring, the 1st power transmission spring, the 2nd power transmission spring, the diaphragm of tape insulation push rod, spring support, middle fixed contact, insulation spacer; Wherein, the 4th contact and binding post and middle fixed contact are intersected installation mutually; The cast material of housing is fixed the 1st contact and binding post, the 3rd contact and binding post, the 2nd contact and binding post, the 4th contact and binding post, middle fixed contact; Inner at pressure chamber, the 1st power transmission spring places between the diaphragm 5 and the 1st armature contact of tape insulation push rod; The 1st preloading spring places between the 1st armature contact and the spring support; The 2nd power transmission spring places between spring support and the 2nd armature contact; The 2nd preloading spring places between the 2nd armature contact and the insulation spacer; The 3rd preloading spring places between the 3rd armature contact and the housing bottom; There is aperture at the center of the 1st armature contact, the 2nd armature contact, and the insulation push rod of the diaphragm of tape insulation push rod passes the aperture in the middle of the 1st armature contact, the 2nd armature contact; Spring support is fixedly connected with the diaphragm of tape insulation push rod.
As improvement of the present invention, the central small hole diameter of described the 1st armature contact, the 2nd armature contact is than the large 0.3mm～0.5mm of diameter of the insulation push rod of the diaphragm of tape insulation push rod.
As improvement of the present invention, described housing adopts insulating material to make.
As a further improvement on the present invention, the 1st contact and binding post, the 3rd contact and binding post, the 2nd contact and binding post, the 4th contact and binding post, the 3rd armature contact, the 2nd armature contact, the 1st armature contact, middle fixed contact are conductive metallic material.
As a further improvement on the present invention, described joint adopts metal material to make.
Further improve as of the present invention, the 2nd preloading spring, the 1st preloading spring, the 3rd preloading spring all have pretightning force, and its pretightning force size is respectively 2.2MPa, 0.2MPa, 3MPa.
The present invention is a kind of combined type triple burden switch, and it can control the low pressure in the air-conditioning refrigeration system, middle pressure pressure and high-pressure simultaneously.Therefore this pressure switch has been removed from and has been used simultaneously the Three pressures switch because low tension switch, Medium voltage switch or circuit breaker and high-voltage switch gear are combined into one.This triple burden construction of switch is simply compact, and with low cost, it is also comparatively convenient to use.Only need simultaneously to use a triple burden switch just can reach control low pressure, middle pressure pressure and high-pressure, so not only saved two switches whiles but also reduced by two mounting points, also just reduced by two leakage points that cold-producing medium is possible, thus more effective safe and reliable when having guaranteed to use.
Description of drawings
Fig. 1 is the basic, normal, high pressure triple burden of air conditioning for automobiles switch junctions composition;
Fig. 2 is air conditioning for automobiles operation principle circuit diagram.
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail.
As shown in Figure 1, the basic, normal, high pressure triple burden of a kind of air conditioning for automobiles switch comprises housing 6 and pressure chamber, and the top of housing 6 is equipped with joint 14, the top exterior walls of joint 14 is provided with connecting thread, is provided with the ostium that passes into pressure source at the top of joint 14.This triple burden switch also comprises diaphragm 15, spring support 10, middle fixed contact 16 and the insulation spacer 17 of the 1st contact and binding post 1, the 2nd contact and binding post 3, the 3rd contact and binding post 2, the 4th contact and binding post 4, the 1st armature contact 12, the 2nd armature contact 8, the 3rd armature contact 5, the 1st preloading spring 11, the 2nd preloading spring 7, the 3rd preloading spring 18, the 1st power transmission spring 13, the 2nd power transmission spring 9, tape insulation push rod.Wherein, the 4th contact and binding post 4 and middle fixed contact 16 are intersected installation mutually; The cast material of housing 6 is fixed the 1st contact and binding post 1, the 3rd contact and binding post 2, the 2nd contact and binding post 3, the 4th contact and binding post 4, middle fixed contact 16.Inner at pressure chamber, the 1st power transmission spring 13 places between the diaphragm 15 and the 1st armature contact 12 of tape insulation push rod; The 1st preloading spring 11 places between described the 1st armature contact 12 and the spring support 10.The 2nd power transmission spring 9 places between described spring support 10 and the 2nd armature contact 8; The 2nd preloading spring 7 places between described the 2nd armature contact 8 and the insulation spacer 17; The 3rd preloading spring 18 places between the bottom of the 3rd armature contact 5 and housing 6.There is aperture at the center of the 1st armature contact 12, the 2nd armature contact 8, and the diameter of aperture is greater than the diameter of the insulation push rod of the diaphragm 15 of tape insulation push rod, and the insulation push rod passes the aperture in the middle of described the 1st armature contact 12, the 2nd armature contact 8.Spring support 10 is fixedly connected with the diaphragm 15 of tape insulation push rod.
The central small hole diameter of the 1st armature contact 12, the 2nd armature contact 8 is than the large 0.3mm of diameter of the insulation push rod of the diaphragm 15 of described tape insulation push rod～0.5mm mm.Housing 6 adopts insulating material to make.The 1st contact and binding post 1, the 3rd contact and binding post 2, the 2nd contact and binding post 3, the 4th contact and binding post 4, the 3rd armature contact 5, the 2nd armature contact 8, the 1st armature contact 12, middle fixed contact 16 are conductive metallic material.Joint 14 adopts metal material.The 2nd preloading spring 7, the 1st preloading spring 11, the 3rd preloading spring 18 all have pretightning force, and its pretightning force size is respectively 2.2MPa, 0.2MPa, 3MPa.
The basic, normal, high pressure triple burden of a kind of air conditioning for automobiles of the present invention switch has substituted low tension switch, high-voltage switch gear, the Medium voltage switch or circuit breaker of orthodox car air-conditioning refrigeration system.In the orthodox car air-conditioning refrigeration system, low tension switch, high-voltage switch gear, Medium voltage switch or circuit breaker are contained in respectively on the pressure duct, shown in 25.1 among Fig. 2,25.2 and 25.3.Low tension switch 25.1 is used for controlling electromagnetic clutch 27 with high-voltage switch gear 25.2, and Medium voltage switch or circuit breaker 25.3 is top gears of controlling cooling fan motor 28.When system pressure was lower than 0.2MPa, low tension switch 25.1 disconnected, when system pressure is higher than 0.2MPa, and low tension switch 25.1 closed connections.When system pressure was higher than 3MPa, high-voltage switch gear 25.2 disconnected, when system pressure is lower than 3MPa, and high-voltage switch gear 25.2 closed connections.Because system pressure is excessively low; as when being lower than 0.2MPa; can cause the compressor of air conditioner dry grinding and earlier period damage; too high when system pressure, as be higher than 3MPa, then can cause pipelines from bursting; therefore; the low tension switch of automobile air conditioning refrigerating system, high-voltage switch gear are connected in the electromagnetic clutch circuit of compressor usually, when hypertonia or cross and to cut off the electromagnetic clutch for compressor circuit when low, compressor are shielded.When system pressure is higher than 2.2MPa, Medium voltage switch or circuit breaker 25.3 closed connections, when system pressure was lower than 2.2MPa, Medium voltage switch or circuit breaker 25.3 disconnected.Because it is higher to work as system pressure, as is higher than 2.2MPa, higher reason may be because bad the causing of condenser heat radiation need to be strengthened heat radiation to condenser, so Medium voltage switch or circuit breaker 25.3 connection cooling fan top gears are to strengthen the heat radiation of condenser.
The invention provides the basic, normal, high pressure triple burden of a kind of air conditioning for automobiles switch, control simultaneously the unlatching of refrigerant compressor or close top gear with cooling fan motor, its course of work is as follows:
The refrigerant pressure source of automobile air-conditioner high-pressure pipeline enters the sealing load chamber by ostium, promote the diaphragm of tape insulation push rod and drive preloading spring and the power transmission spring produces length travel with respect to housing, moving contact is contacted with fixed contact and binding post or disconnect, thereby make compressor of air conditioner electromagnetic clutch closure or disconnection, make cooling fan be operated in different gears.
Be evaporator temperature when closed when being higher than 0 ℃ in ignition switch 22 and air-conditioning switch 23 closures, evaporator temperature switch 24 satisfied temperature conditions, the basic, normal, high pressure triple burden of a kind of air conditioning for automobiles of the present invention switch has following four kinds of mode of operations:
When system pressure is lower than 0.2MPa, because the effect of each preloading spring pretightning force, the 3rd armature contact 5 is connected the 2nd contact and binding post 3 with middle fixed contact 16, the 1st armature contact 12 is disconnected the 1st contact and binding post 1 and middle fixed contact 16, the 1 contacts and binding post 1 and the 2nd contact and binding post 3 and is disconnected on the whole; In like manner, the 3rd contact and binding post 2 and the 4th contact and binding post 4 also disconnect.At this moment, not adhesive of electromagnetic clutch, compressor of air conditioner is not worked, and cooling fan motor is not worked yet.
When system pressure greater than 0.2MPa during less than 2.2MPa, system pressure acts on the top of the diaphragm 15 of tape insulation push rod, make the 1st armature contact 12 connect the 1st contact and binding post 1 and middle fixed contact 16 by the 1st power transmission spring 13, but its elastic force is not enough so that the 3rd armature contact 5 disconnects the 2nd contact and binding post 3 with middle fixed contact 16 again, and the 1st contact and binding post 1 and the 2nd contact and binding post 3 are connected; The 3rd contact and binding post 2 and the 4th contact and binding post 4 continue to disconnect.At this moment, the electromagnetic clutch adhesive, compressor of air conditioner work, simultaneously, and the also adhesive of the switch contact of cooling fan relay, power supply is connected cooling fan motor through resistance, the cooling fan motor low speed rotation.
When system pressure greater than 2.2MPa during less than 3MPa, along with the increase of pressure, the diaphragm 15 of tape insulation push rod continues to move down, the 1st contact and binding post 1 and the 2nd contact and binding post 3 are still connected; The 3rd contact and binding post 2 and the 4th contact and binding post 4 are also connected.At this moment, the electromagnetic clutch adhesive, compressor of air conditioner work, simultaneously, and the also adhesive of the switch contact of high-speed relay, the top gear circuit of power connection cooling fan motor, cooling fan motor turns at a high speed.
When system pressure during greater than 3MPa, system pressure continues to make the 1st armature contact 12 to connect the 1st contact and binding post 1 and middle fixed contact 16, simultaneously, push rod on the diaphragm 15 of tape insulation push rod promotes insulation spacer 17 makes the 3rd armature contact 5 that the 2nd contact and binding post 3 are disconnected with middle fixed contact 16, and the 1st contact and binding post 1 and the 2nd contact and binding post 3 disconnect on the whole; The 3rd contact and binding post 2 and the 4th contact and binding post 4 are still connected.At this moment, not adhesive of electromagnetic clutch, compressor of air conditioner is not worked; Simultaneously, the switch contact adhesive of high-speed relay, the top gear circuit of power connection cooling fan motor, cooling fan motor turns at a high speed.
The above has done detailed description to embodiments of the present invention by reference to the accompanying drawings, but the present invention is not limited to above-mentioned execution mode, in the ken that those of ordinary skills possess, can also not break away under the prerequisite of aim of the present invention and make various variations.
Claims (6)
1. an air conditioning for automobiles is low, in, the high pressure triple pressure switch, comprise housing (6) and pressure chamber, the top of described housing (6) is equipped with joint (14), the top exterior walls of described joint (14) is provided with connecting thread, top at described joint (14) is provided with the ostium that passes into pressure source, it is characterized in that: this triple burden switch also comprises the 1st contact and binding post (1), the 2nd contact and binding post (3), the 3rd contact and binding post (2), the 4th contact and binding post (4), the 1st armature contact (12), the 2nd armature contact (8), the 3rd armature contact (5), the 1st preloading spring (11), the 2nd preloading spring (7), the 3rd preloading spring (18), the 1st power transmission spring (13), the 2nd power transmission spring (9), the diaphragm of tape insulation push rod (15), spring support (10), middle fixed contact (16), insulation spacer (17); Wherein, described the 4th contact and binding post (4) with described in the middle of fixed contact (16) mutually intersect installation; The cast material of described housing (6) is fixed the 1st contact and binding post (1), the 3rd contact and binding post (2), the 2nd contact and binding post (3), the 4th contact and binding post (4), middle fixed contact (16); Inner at pressure chamber, described the 1st power transmission spring (13) places between the diaphragm (15) and the 1st armature contact (12) of described tape insulation push rod; Described the 1st preloading spring (11) places between described the 1st armature contact (12) and the spring support (10); Described the 2nd power transmission spring (9) places between described spring support (10) and the 2nd armature contact (8); Described the 2nd preloading spring (7) places between described the 2nd armature contact (8) and the insulation spacer (17); Described the 3rd preloading spring (18) places between the bottom of described the 3rd armature contact (5) and housing (6); There is aperture at the center of described the 1st armature contact (12), the 2nd armature contact (8), and the insulation push rod of the diaphragm of described tape insulation push rod (15) passes the aperture in the middle of described the 1st armature contact (12), the 2nd armature contact (8); Described spring support (10) is fixedly connected with the diaphragm (15) of described tape insulation push rod.
2. according to the basic, normal, high pressure triple burden of a kind of air conditioning for automobiles claimed in claim 1 switch, it is characterized in that: the described central small hole diameter of the 1st armature contact (12), the 2nd armature contact (8) of stating is than the large 0.3mm～0.5mm of diameter of the insulation push rod of the diaphragm (15) of described tape insulation push rod.
3. the basic, normal, high pressure triple burden of a kind of air conditioning for automobiles according to claim 1 switch is characterized in that: described housing (6) adopts insulating material to make.
4. the basic, normal, high pressure triple burden of a kind of air conditioning for automobiles according to claim 1 switch, it is characterized in that: described the 1st contact and binding post (1), the 3rd contact and binding post (2), the 2nd contact and binding post (3), the 4th contact and binding post (4), the 3rd armature contact (5), the 2nd armature contact (8), the 1st armature contact (12), middle fixed contact (16) are conductive metallic material.
5. the basic, normal, high pressure triple burden of a kind of air conditioning for automobiles according to claim 1 switch is characterized in that: described joint (14) adopts metal material to make.
6. the basic, normal, high pressure triple burden of a kind of air conditioning for automobiles according to claim 1 switch, it is characterized in that: described the 1st preloading spring (11), the 2nd preloading spring (7), the 3rd preloading spring (18) all have pretightning force, and its pretightning force size is respectively 2.2MPa, 0.2MPa, 3MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210427281.XA CN102903571B (en) | 2012-10-31 | 2012-10-31 | Low-middle-high triple-pressure switch of automobile air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210427281.XA CN102903571B (en) | 2012-10-31 | 2012-10-31 | Low-middle-high triple-pressure switch of automobile air conditioner |
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| Publication Number | Publication Date |
|---|---|
| CN102903571A true CN102903571A (en) | 2013-01-30 |
| CN102903571B CN102903571B (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210427281.XA Active CN102903571B (en) | 2012-10-31 | 2012-10-31 | Low-middle-high triple-pressure switch of automobile air conditioner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103158495A (en) * | 2013-03-04 | 2013-06-19 | 浙江吉利汽车研究院有限公司杭州分公司 | Air conditioning system for hybrid power vehicle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6427137A (en) * | 1987-07-23 | 1989-01-30 | Fuji Koki Mfg | Three-action type pressure switch |
| JPH06119856A (en) * | 1992-10-02 | 1994-04-28 | Tgk Co Ltd | Pressure switch |
| CN2619124Y (en) * | 2003-05-09 | 2004-06-02 | 常州市盛士达汽车空调有限公司 | Three position pressure controller |
| CN201226109Y (en) * | 2008-07-15 | 2009-04-22 | 贺菊春 | Mechanical diaphragm tri-state pressure switch for |
| CN202888072U (en) * | 2012-10-31 | 2013-04-17 | 无锡商业职业技术学院 | Low-middle-high pressure triple-pressure switch of automobile air conditioner |
-
2012
- 2012-10-31 CN CN201210427281.XA patent/CN102903571B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6427137A (en) * | 1987-07-23 | 1989-01-30 | Fuji Koki Mfg | Three-action type pressure switch |
| JPH06119856A (en) * | 1992-10-02 | 1994-04-28 | Tgk Co Ltd | Pressure switch |
| CN2619124Y (en) * | 2003-05-09 | 2004-06-02 | 常州市盛士达汽车空调有限公司 | Three position pressure controller |
| CN201226109Y (en) * | 2008-07-15 | 2009-04-22 | 贺菊春 | Mechanical diaphragm tri-state pressure switch for |
| CN202888072U (en) * | 2012-10-31 | 2013-04-17 | 无锡商业职业技术学院 | Low-middle-high pressure triple-pressure switch of automobile air conditioner |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103158495A (en) * | 2013-03-04 | 2013-06-19 | 浙江吉利汽车研究院有限公司杭州分公司 | Air conditioning system for hybrid power vehicle |
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| Publication number | Publication date |
|---|---|
| CN102903571B (en) | 2014-12-10 |
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Effective date of registration: 20190606 Address after: 221600 Peixian Economic Development Zone, Wuxi City, Jiangsu Province Patentee after: Jiangsu Millennium Hangxiao Assembly Building Technology Co., Ltd. Address before: 214153 No. 809 Qianhu Road, Huishan District, Wuxi City, Jiangsu Province Patentee before: Wuxi Institute of Commerce |
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Address after: 221600 Peixian Economic Development Zone, Xuzhou City, Jiangsu Province Patentee after: Jiangsu Millennium Hangxiao Assembly Building Technology Co., Ltd. Address before: 221600 Peixian Economic Development Zone, Wuxi City, Jiangsu Province Patentee before: Jiangsu Millennium Hangxiao Assembly Building Technology Co., Ltd. |
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