CN1035081C - Multi-compressor refrigerator for air-conditioner - Google Patents
Multi-compressor refrigerator for air-conditioner Download PDFInfo
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- CN1035081C CN1035081C CN94111478A CN94111478A CN1035081C CN 1035081 C CN1035081 C CN 1035081C CN 94111478 A CN94111478 A CN 94111478A CN 94111478 A CN94111478 A CN 94111478A CN 1035081 C CN1035081 C CN 1035081C
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Abstract
The present invention relates to a multi-compressor refrigerator for an air conditioner, which has the structure that a main exhaust pipe and a main air return pipe are connected with an exhaust pipe and an air return pipe of each compressor, so that the compressors are in connection in parallel, a first heat exchanger is connected with the main air return pipe, and a second heat exchanger is connected with the main exhaust pipe; the main exhaust pipe is connected with the exhaust pipe of each compressor through a one-way valve, and the main exhaust pipe is connected with the main air return pipe through an unloading valve. When the present invention is used, refrigeration capacity and heating capacity can be regulated; when the compressors are started, surge currents are small, and waiting time is short for starting once more; the compressors can be started in a step startup mode, so that the surge currents are small.
Description
The present invention relates to a kind of air-conditioner refrigerating plant.
The present used air-conditioner that has only a compressor, because of the cold heating capacity of work schedule constant non-adjustable, so the general big slightly compressor of power that adopts, the indoor temperature that can only adopt the mode that makes the high frequent start and close to keep being regulated when working usually is a certain value.This working method makes near indoor temperature fluctuation setting value bigger, and frequent switch compressor influences its service life; And surge current is bigger when starting, and can cause the interference to power supply grid; And, can make compressor can not get required voltage and can not work because of producing bigger voltage drop.As its improvement, U.S. Pat 4418548 discloses a kind of multi-compressor refrigeration system, and this refrigeration system adopts the compressor parallel mode, both can one work independently, also can many work simultaneously, can regulate the refrigerated medium heat thus, the number of times of high frequent switch is reduced to some extent.Between the exhaust end of each compressor of this system and the air return end capillary must be set.This be because when the compressor in the system be not when all moving, the exhaust end of off-duty compressor can be because of the reverse leakage of the check valve that its exhaust port connected, and higher pressure refrigerant gas is gathered between its exhaust end and check valve.When this can cause the off-duty compressor start,, exhaust end makes the compressor stall owing to having higher pressure refrigerant gas.After capillary was set, this part higher pressure refrigerant gas can be returned low-pressure side by capillary leak.But because leakage rate capillaceous is very slow, when compressor start, between exhaust end and air return end, will have pressure differential, so compressor can not light-load starting, brings the big consequence of surge current when starting compressor.Simultaneously, owing to be in conducting state all the time behind the capillary connecting system, therefore when compressor operating, exist all the time between high and low pressure side and leak, thereby cause running efficiency of system to reduce.Secondly, owing to corresponding to the every compressor in the system capillary must be set, each capillary just has two pads, thus complicated on manufacturing process, and pad is many more, and existing recessive possibility of leaking is also just big more.Once more, because capillary only is slow leakage path, when system is provided with, can only select one, two or a few compressor to start simultaneously.If need when compressor operating, to increase again the platform number of work, then must be earlier with all compressor shutdown, wait between high and low pressure side that pressure is in a basic balance after, could start required platform number once more simultaneously.So not only use inconveniently, and switch compressor number of times is more, has increased the number of times that surge current occurs, and has shortened compressor service life.
The objective of the invention is, but provide a kind of refrigerating capacity adjustable or the refrigerated medium heat is adjustable, the compressor start surge current is little, compressor light-load starting, simple in structure, system works efficient height, start multi-compressor refrigerator for air-conditioner rapidly once more.
Realize providing a kind of refrigerating capacity adjustable in the object of the invention, the compressor start surge current is little, but compressor light-load starting, simple in structure, system works efficient height, starting rapidly once more, the technical scheme of multi-compressor refrigerator for air-conditioner is (referring to Fig. 1): this refrigerating plant comprises at least two compressors (1), (2), every compressor has an exhaust end (9) of discharging high-pressure refrigerant, (10) and an air return end (11) that sucks low pressure refrigerant, (12), the exhaust person in charge (6) is connected with air return end with the exhaust end of every compressor with the return-air person in charge (7) and makes compressor parallel, first heat exchanger (5) is responsible for (7) with return-air and is connected, second heat exchanger (3) is responsible for (6) with exhaust and is connected, and is connected with restricting element (4) between first heat exchanger (5) and second heat exchanger (3); The exhaust end of every compressor is connected with check valve (13), (14) that only allow higher pressure refrigerant gas to discharge, the input of check valve and the exhaust end of compressor are connected, output and exhaust are responsible for (6) and are connected, it is characterized in that, be responsible between (6) and the return-air person in charge (7) being connected with feather valve (15) in exhaust.Thereby realized purpose of the present invention as the single cold type air-conditioner.
Realize providing a kind of refrigerated medium heat adjustable in the object of the invention, the compressor start surge current is little, but compressor light-load starting, simple in structure, system works efficient height, starting rapidly once more, the technical scheme of multi-compressor refrigerator for air-conditioner is (referring to Fig. 2): this refrigerating plant comprises at least two compressors (1), (2), every compressor has an exhaust end (9) of discharging high-pressure refrigerant, (10) and an air return end (11) that sucks low pressure refrigerant, (12), the exhaust person in charge (6) is connected with air return end with the exhaust end of every compressor with the return-air person in charge (7) and makes compressor parallel, first heat exchanger (5) links to each other with the return-air mouth (163) of four-way change-over valve (16), second heat exchanger (3) links to each other with the exhaust outlet (164) of this four-way change-over valve (16), exhaust is responsible for (6) and is linked to each other with the high-pressure mouth (161) of this four-way change-over valve (16), return-air is responsible for (7) and is linked to each other with the low pressure port (162) of this four-way change-over valve (16), is connected with restricting element (4) between first heat exchanger (5) and second heat exchanger (3); The exhaust end of every compressor is connected with check valve (13), (14) that only allow higher pressure refrigerant gas to discharge, the input of check valve and the exhaust end of compressor are connected, output and exhaust are responsible for (6) and are connected, it is characterized in that, be responsible between (6) and the return-air person in charge (7) being connected with feather valve (15) in exhaust.Thereby realized purpose of the present invention as heat pump type air conditioner.
The present invention has positive effect: (1) the present invention uses the work of multiple compressors parallel way, can start one, two or the work of number compressor arbitrarily, thereby can adapt to the indoor required refrigerated medium heat that reaches steady temperature, thereby reduce the compressor switch number of times, prolong the life-span of compressor, and can reduce the number of times of surge current.(2) during compressor start, the present invention adopts feather valve to realize unloading as the short-channel between high and low pressure side, make compressor be in the light-load starting state, treat that all compressor starts finish, close feather valve again, make compressor enter normal operating condition, thus the surge current can reduce compressor start the time.(3) because the present invention adopts feather valve, make the higher pressure refrigerant gas low-pressure side of releasing rapidly, thereby make compressor be in the underloading poised state, therefore when starting once more after the compressor shutdown, need not wait for a period of time, and can enter starting state immediately.(4) feather valve among the present invention can cut out fully, so when compressor operating, no cold-producing medium leaks between the high and low pressure side of refrigeration system, so the operational efficiency of system is higher.(5) though since in the whole refrigeration system platform number of compressor in parallel what, only need a feather valve, pad is less, makes the whole system structure comparatively simple, has improved the reliability of system works.(6) the present invention is passage with the feather valve, and unloading is rapid, and multiple compressors parallel with one another can adopt the echelon Starting mode to start, thereby surge current is further reduced, and the switching on and shutting down number of times of compressor also greatly reduces.
Fig. 1 is a single cold type multi-compressor refrigerator for air-conditioner schematic diagram of the present invention.
Fig. 2 is a heat pump type air conditioner of the present invention multi-compressor refrigerator schematic diagram.
Fig. 3 is an one-way valve structures schematic diagram of the present invention.
Below in conjunction with drawings and Examples the present invention is further described.
See Fig. 1, Fig. 3, the exhaust end (9) of the compressor of two parallel connections (1), (2), (10) are responsible for (6) by check valve (13), (14) with exhaust respectively and are linked to each other, the inlet of second heat exchanger (3) is responsible for (6) with exhaust and is linked to each other, outlet links to each other with the inlet of restricting element (4), the outlet of restricting element (4) is connected to the inlet of first heat exchanger (5), and first heat exchanger (5) is responsible for (7) by return-air and is linked to each other with air return end (11), (12) of compressor (1), (2) respectively.The FDF6A magnetic valve that is provided with the refrigeration accessory head factory production of Xinchang, Zhejiang between the exhaust person in charge (6) and the return-air person in charge (7) is as feather valve (15).When refrigerating plant of the present invention was started working, feather valve (15) energising was opened, and makes conducting between high and low pressure side; When compressor (1), (2) startup, behind the refrigerant gas process exhaust end (9) of discharge, (10) and check valve (13), (14), directly be back to return-air by feather valve (15) and be responsible for (7), return air return end (11), (12) of compressor.Owing to do not have pressure differential between the air inlet of compressor (1), (2), exhaust side, so compressor (1), (2) be in the light-load starting state, and surge current is less; After compressor (1), (2) start normally, close electromagnetic unloading valve (15), after higher pressure refrigerant gas is compiled through the exhaust person in charge (6), enter second heat exchanger (3), heat release is condensed into liquid state, flowed into first heat exchanger (5) after restricting element (4) the throttling step-down then, gaseous state is absorbed heat in evaporation.Cooled via return air flows into air return end (11), (12) respectively after being responsible for (7) again, thereby gets back to compressor (1), (2) and be compressed, and finishes a kind of refrigeration cycle.
The compression board number of devoting oneself to work is selected according to the required refrigerating capacity of maintenance indoor temperature by controller (8).When only needing compressor work, controller (8) control one compressor is started working, make the check valve conducting that links to each other with the compressor of devoting oneself to work, and the check valve that links to each other with another compressor is in closed condition because of compressor does not start, thereby compressor of will not work and refrigeration system are cut off, and realize single compressor work.Controller (8) is also controlled electromagnetic unloading valve (15) and is opened in the compressor start process, starts to close when finishing and realize offloading functions.
(131), (141) are left valve gap among Fig. 3, and (132), (142) are piston, and (133), (143) are valve body, and (134), (144) are right valve gap.
Embodiment 2
See Fig. 2, Fig. 3, the exhaust end (9) of the compressor of two parallel connections (1), (2), (10) are responsible for (6) by check valve (13), (14) with exhaust respectively and are linked to each other, the high-pressure mouth (161) of four-way change-over valve (16) is responsible for (6) with exhaust and is communicated, and exhaust outlet (164) links to each other with second heat exchanger (3).The outlet of second heat exchanger (3) links to each other with the inlet of restricting element (4), and the outlet of restricting element (4) is connected to the inlet of first heat exchanger (5).The return-air mouth (163) of four-way change-over valve (16) communicates with the outlet of first heat exchanger (5), and low pressure port (162) links to each other with air return end (11), (12) of compressor (1), (2) respectively after being responsible for (7) through return-air.The FDF6A magnetic valve that is provided with the refrigeration accessory head factory production of Xinchang, Zhejiang between the exhaust person in charge (6) and the return-air person in charge (7) is as feather valve (15).When refrigerating plant of the present invention was started working, feather valve (15) energising was opened, and makes conducting between high and low pressure side; When compressor (1), (2) startup, behind the refrigerant gas process exhaust end (9) of discharge, (10) and check valve (13), (14), directly be back to return-air by feather valve (15) and be responsible for (7), return air return end (11), (12) of compressor.Owing to do not have pressure differential between the air inlet of compressor (1), (2), exhaust side, so compressor (1), (2) be in the light-load starting state, and surge current is less; After compressor (1), (2) start normally, close electromagnetic unloading valve (15), after higher pressure refrigerant gas is compiled through the exhaust person in charge (6), flow into valve body from the high-pressure mouth (161) of four-way change-over valve (16), flowed out by exhaust outlet (164), enter second heat exchanger (3), heat release is condensed into liquid state, flowed into first heat exchanger (5) after restricting element (4) the throttling step-down then, gaseous state is absorbed heat in evaporation.Return-air mouth (163) through four-way change-over valve (16) enters valve body, flows out from low pressure port (162) again, flows into air return end (11), (12) respectively after being responsible for (7) by return-air, thereby gets back to compressor (1), (2) and be compressed, and finishes a kind of refrigeration cycle.
The compression board number of devoting oneself to work is selected according to the required refrigerated medium heat of maintenance indoor temperature by controller (8).When only needing compressor work, controller (8) control one compressor is started working, make the check valve conducting that links to each other with the compressor of devoting oneself to work, and the check valve that links to each other with another compressor is in closed condition because of compressor does not start, thereby compressor of will not work and refrigeration system are cut off, and realize single compressor work.Controller (8) is also controlled electromagnetic unloading valve (15) and is opened in the compressor start process, starts to close when finishing and realize offloading functions.
(131), (141) are left valve gap among Fig. 3, and (132), (142) are piston, and (133), (143) are valve body, and (134), (144) are right valve gap.
Claims (2)
1. multi-compressor refrigerator for air-conditioner, comprise at least two compressors (1), (2), every compressor has an exhaust end (9) of discharging high-pressure refrigerant, (10) and an air return end (11) that sucks low pressure refrigerant, (12), the exhaust person in charge (6) is connected with air return end with the exhaust end of every compressor with the return-air person in charge (7) and makes compressor parallel, first heat exchanger (5) is responsible for (7) with return-air and is connected, second heat exchanger (3) is responsible for (6) with exhaust and is connected, and is connected with restricting element (4) between first heat exchanger (5) and second heat exchanger (3); The exhaust side of every compressor is connected with check valve (13), (14) that only allow gases at high pressure to discharge, the input of check valve and the exhaust end of compressor are connected, output and exhaust are responsible for (6) and are connected, and it is characterized in that: be responsible between (6) and the return-air person in charge (7) being connected with feather valve (15) in exhaust.
2. multi-compressor refrigerator for air-conditioner, comprise at least two compressors (1), (2), every compressor has an exhaust end (9) of discharging high-pressure refrigerant, (10) and an air return end (11) that sucks low pressure refrigerant, (12), the exhaust person in charge (6) is connected with air return end with the exhaust end of every compressor with the return-air person in charge (7) and makes compressor parallel, first heat exchanger (5) links to each other with the return-air mouth (163) of four-way change-over valve (16), second heat exchanger (3) links to each other with the exhaust outlet (164) of this four-way change-over valve (16), exhaust is responsible for (6) and is linked to each other with the high-pressure mouth (161) of this four-way change-over valve (16), return-air is responsible for (7) and is linked to each other with the low pressure port (162) of this four-way change-over valve (16), is connected with restricting element (4) between first heat exchanger (5) and second heat exchanger (3); The exhaust side of every compressor is connected with check valve (13), (14) that only allow gases at high pressure to discharge, the input of check valve and the exhaust end of compressor are connected, output and exhaust are responsible for (6) and are connected, and it is characterized in that: be responsible between (6) and the return-air person in charge (7) being connected with feather valve (15) in exhaust.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94111478A CN1035081C (en) | 1994-10-12 | 1994-10-12 | Multi-compressor refrigerator for air-conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94111478A CN1035081C (en) | 1994-10-12 | 1994-10-12 | Multi-compressor refrigerator for air-conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1109960A CN1109960A (en) | 1995-10-11 |
| CN1035081C true CN1035081C (en) | 1997-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94111478A Expired - Fee Related CN1035081C (en) | 1994-10-12 | 1994-10-12 | Multi-compressor refrigerator for air-conditioner |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1429082B1 (en) * | 2002-12-10 | 2012-04-11 | LG Electronics Inc. | Central control system and method for controlling air conditioners |
| CN1782633B (en) * | 2004-11-29 | 2010-05-05 | 乐金电子(天津)电器有限公司 | Volume vaviable type freezing system with multiple compressors and its control method |
| CN102519319A (en) * | 2011-12-29 | 2012-06-27 | 谢逢华 | Missile outdoor high-temperature storage ultra-thin refrigeration device |
| CN104534736B (en) * | 2014-12-16 | 2016-08-17 | 烟台万德嘉空调设备有限公司 | Transpiration-cooled heat pump apparatus of air source |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4418548A (en) * | 1982-03-29 | 1983-12-06 | Trane Cac, Inc. | Variable capacity multiple compressor refrigeration system |
| US4779428A (en) * | 1987-10-08 | 1988-10-25 | United States Of America As Represented By The Administrator, National Aeronautics And Space Administration | Joule Thomson refrigerator |
| US5186011A (en) * | 1991-02-18 | 1993-02-16 | Matsushita Electric Industrial Co., Ltd. | Refrigerant cycling apparatus |
| US5241829A (en) * | 1989-11-02 | 1993-09-07 | Osaka Prefecture Government | Method of operating heat pump |
-
1994
- 1994-10-12 CN CN94111478A patent/CN1035081C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4418548A (en) * | 1982-03-29 | 1983-12-06 | Trane Cac, Inc. | Variable capacity multiple compressor refrigeration system |
| US4779428A (en) * | 1987-10-08 | 1988-10-25 | United States Of America As Represented By The Administrator, National Aeronautics And Space Administration | Joule Thomson refrigerator |
| US5241829A (en) * | 1989-11-02 | 1993-09-07 | Osaka Prefecture Government | Method of operating heat pump |
| US5186011A (en) * | 1991-02-18 | 1993-02-16 | Matsushita Electric Industrial Co., Ltd. | Refrigerant cycling apparatus |
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| Publication number | Publication date |
|---|---|
| CN1109960A (en) | 1995-10-11 |
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