CN216204464U - Dual-system air source heat pump with defrosting function - Google Patents
Dual-system air source heat pump with defrosting function Download PDFInfo
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- CN216204464U CN216204464U CN202122614313.4U CN202122614313U CN216204464U CN 216204464 U CN216204464 U CN 216204464U CN 202122614313 U CN202122614313 U CN 202122614313U CN 216204464 U CN216204464 U CN 216204464U
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Abstract
The utility model provides a double-system air source heat pump with a defrosting function, which reduces temperature fluctuation of a heat supply user end when defrosting is carried out and comprises a first circulating system and a second circulating system, wherein the first circulating system comprises a first compressor, a first four-way valve, a first evaporator and a first gas-liquid separator, and the second circulating system comprises a second compressor, a second four-way valve, a second evaporator and a second gas-liquid separator; also comprises a defrosting heat exchanger and a condenser.
Description
Technical Field
The utility model relates to the field of air source air conditioners, in particular to the technical field of air source heat pump defrosting, and specifically relates to a dual-system air source heat pump with a defrosting function.
Background
The air source heat pump has the advantages of high efficiency, no pollution, simple structure, easy installation and the like, and can meet the requirements of refrigeration and heating of buildings. Along with the promotion of changing coal into electricity in recent years, the low-temperature enhanced vapor injection air source heat pump system is gradually applied in a large range in northern areas. In a winter heating mode, when the condenser of the air source heat pump system adopts a water-cooling heat exchanger, hot water can be provided for users, and when the condenser adopts an air-cooling heat exchanger, hot air can be provided for users. However, the evaporator is located outdoors, the outdoor temperature in winter is low, and the evaporator is prone to frosting, when the evaporator frosts seriously, the working efficiency of the heat pump is affected, a common mode is that a circulation pipeline is changed through a four-way valve, the evaporator is used as a condenser, and the evaporator is defrosted by heat carried by a high-temperature high-pressure refrigerant, the defrosting process is called defrosting, and the defrosting time is generally 3-8 minutes. However, when defrosting, the refrigerant absorbs heat from the heat-supplying user terminal when passing through the condenser, so that the temperature of the heat-supplying user terminal is reduced, which causes temperature fluctuation of the heat-supplying user terminal and affects normal use.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to provide a dual-system air source heat pump with a defrosting function, and when defrosting is carried out, temperature fluctuation of a heat supply user side is reduced.
The utility model is realized by the following technical scheme:
a double-system air source heat pump with a defrosting function comprises a first circulating system and a second circulating system, wherein the first circulating system comprises a first compressor, a first four-way valve, a first evaporator and a first gas-liquid separator; the first interface of the first four-way valve is sequentially communicated with the first compressor, the first gas-liquid separator and the second interface of the first four-way valve, the third interface of the first four-way valve is sequentially communicated with the first evaporator and the condenser, and the fourth interface of the first four-way valve is sequentially communicated with the defrosting heat exchanger and the condenser; in the second circulating system, a first interface of the second four-way valve is sequentially communicated with a second compressor, a second gas-liquid separator and a second interface of the second four-way valve, a third interface of the second four-way valve is sequentially communicated with a second evaporator and the condenser, and a fourth interface of the second four-way valve is sequentially communicated with the defrosting heat exchanger and the condenser.
Further, the defrosting heat exchanger is a plate heat exchanger, and the condenser is an air cooling heat exchanger or a water cooling heat exchanger.
Furthermore, a first expansion valve and a first liquid storage device are arranged between the first evaporator and the condenser, and a second expansion valve and a second liquid storage device are arranged between the second evaporator and the condenser.
Compared with the prior art, the utility model has the following beneficial effects:
1. the first circulation system and the second circulation system perform staggered defrosting, when the first circulation system performs defrosting, the second circulation system performs normal heating operation, a refrigerant in the first circulation system is compressed by the first compressor, then passes through the first four-way valve, enters the first evaporator for condensation and defrosting, then passes through the condenser (at the moment, water or air in the condenser stops flowing and heat exchange), enters the defrosting heat exchanger, performs heat exchange with high-temperature and high-pressure gas in the second circulation system, evaporates into low-temperature and low-pressure gas, and then enters the first compressor for compression to complete circulation. When the second circulation system carries out defrosting, the first circulation system normally heats and operates, and the second circulation system repeats the working process;
in the defrosting process, the refrigerant absorbs heat from the other circulating system through the defrosting heat exchanger, so that heat absorption at a condenser is reduced, and temperature fluctuation of a heat supply user side is reduced;
2. the utility model can prolong the defrosting time and has good defrosting effect.
Drawings
FIG. 1 is a schematic structural diagram of a dual-system air source heat pump with defrosting function according to the present invention;
FIG. 2 is a schematic diagram of a first cycle system defrosting of the dual system air source heat pump according to the present invention;
FIG. 3 is a schematic diagram of a second cycle defrosting of the dual system air source heat pump according to the present invention;
in the figure: 1. the defrosting device comprises a first compressor, a first four-way valve, a defrosting heat exchanger, a condenser, a first liquid storage device, a first expansion valve, a first evaporator, a first liquid storage device, a first expansion valve, a second expansion valve, a first evaporator, a first liquid-liquid separator, a first compressor, a second four-way valve, a second liquid storage device, a second expansion valve, a second evaporator, a second liquid storage device, a second expansion valve, a second evaporator, a second liquid storage device and a second liquid-liquid separator, wherein the first compressor, the first four-way valve, the defrosting heat exchanger, the second four-way valve, the first liquid storage device, the second expansion valve, the second evaporator and the second liquid-liquid storage device are arranged in sequence.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
The embodiment discloses a dual-system air source heat pump with a defrosting function, as shown in fig. 1, which mainly includes a first circulation system, a second circulation system, a condenser 4 and a defrosting heat exchanger 3, wherein the first circulation system includes a first compressor 1, a first four-way valve 2, a first reservoir 5, a first expansion valve 6, a first evaporator 7 and a first gas-liquid separator 8. The second circulation system includes a second compressor 9, a second four-way valve 10, a second reservoir 11, a second expansion valve 12, a second evaporator 13, and a second gas-liquid separator 14. The two circulation systems are connected in parallel into a whole through a condenser 4 and a defrosting heat exchanger 3.
In the first circulation system, a first interface of the first four-way valve 2 is sequentially communicated with the first compressor 1, the first gas-liquid separator 8 and a second interface of the first four-way valve 2 through pipelines, a third interface of the first four-way valve 2 is sequentially communicated with the first evaporator 7, the first expansion valve 6, the first liquid storage device 5 and the condenser 4 through pipelines, and a fourth interface of the first four-way valve 2 is sequentially communicated with the defrosting heat exchanger 3 and the condenser 4 through pipelines.
In the second circulation system, a first interface of the second four-way valve 10 is sequentially communicated with the second compressor 9, the second gas-liquid separator 14 and a second interface of the second four-way valve 10 through pipelines, a third interface of the second four-way valve 10 is sequentially communicated with the second evaporator 13, the second expansion valve 12, the second liquid reservoir 11 and the condenser 4, and a fourth interface of the second four-way valve 10 is sequentially communicated with the defrosting heat exchanger 3 and the condenser 4 through pipelines.
In the above, the condenser may be a water-cooled heat exchanger if the hot water is provided to the heat supply user side, or an air-cooled heat exchanger if the hot water is provided to the heat supply user side.
The double-system air source heat pump provided by the utility model specifically works as follows:
1. in a heating mode, a first interface of the first four-way valve is communicated with a fourth interface, a second interface is communicated with a third interface, a refrigerant in the first circulating system is compressed by the first compressor 1, then passes through the first four-way valve 2 and the defrosting heat exchanger 3, enters the condenser 4 for condensation and heat release, heats water or air to heat a heating user side, then passes through the first liquid storage device 5, enters the first expansion valve 6 for throttling into low-temperature and low-pressure gas-liquid two-phase flow, then enters the first evaporator 7 to absorb heat in the air to evaporate into low-temperature and low-pressure gas, passes through the first gas-liquid separator 8, and then enters the first compressor 1 for compression to complete circulation. The first interface and the fourth interface of the second four-way valve are communicated, the second interface is communicated with the third interface, the refrigerant circulation process in the second circulation system is the same as that of the first circulation system, and at the moment, the defrosting heat exchanger 3 only serves as a refrigerant flow channel and does not participate in heat exchange.
2. When the first circulation system is defrosted, the heat supply user side is stopped, the first interface of the first four-way valve is communicated with the third interface, the second interface is communicated with the fourth interface, and the second circulation system operates normally, as shown in fig. 2, a refrigerant in the first circulation system is compressed by the first compressor 1, then passes through the first four-way valve 2, enters the first evaporator 7 for condensation and defrosting, is throttled by the first expansion valve 6 into a low-temperature and low-pressure gas-liquid two-phase flow, passes through the first liquid reservoir 5 and the condenser 4 (at this time, the heat supply user side stops working, and water or air in the condenser 4 stops flowing and heat exchanging), enters the defrosting heat exchanger 3 and high-temperature and high-pressure gas in the second circulation system for heat exchanging and evaporating into low-temperature gas, and then enters the first compressor 1 for compression and completing circulation. The refrigerant in the second circulation system is compressed into high-temperature and high-pressure gas by a second compressor 9, then passes through a second four-way valve 10, enters a defrosting heat exchanger 3 to exchange heat with low-temperature and low-pressure gas in the first circulation system to be condensed into liquid, then passes through a condenser 4 and a second liquid storage device 11, enters a second expansion valve 12 to be throttled into low-temperature and low-pressure gas-liquid two-phase flow, then enters a second evaporator 13 to absorb heat in air to be evaporated into low-temperature and low-pressure gas, passes through a second gas-liquid separator 14, and then enters the second compressor 9 to be compressed to complete circulation.
3. When the second circulation system is defrosted, the heat supply user terminal is stopped, the first interface of the second four-way valve is communicated with the third interface, the second interface is communicated with the fourth interface, the first circulation system operates normally, as shown in fig. 3, the refrigerant in the first circulation system is compressed into high-temperature and high-pressure gas by the first compressor 1, then passes through the first four-way valve 2, enters the defrosting heat exchanger 3 to exchange heat with the low-temperature and low-pressure gas in the second circulation system, and is condensed into liquid, then passes through a condenser 4 (at the moment, the heat supply user end stops working, and the water or air in the condenser 4 stops flowing and exchanging heat)) and a first reservoir 5, enters a first expansion valve 6 to be throttled into a gas-liquid two-phase flow with low temperature and low pressure, then the gas enters a first evaporator 7 to absorb heat in the air and evaporate the heat into low-temperature and low-pressure gas, passes through a first gas-liquid separator 8 and then enters a first compressor 1 to be compressed to complete circulation. The refrigerant in the second circulation system is compressed by the second compressor 9, then passes through the second four-way valve 10, enters the second evaporator 13 for condensation and defrosting, then is throttled by the second expansion valve 12 into low-temperature and low-pressure gas-liquid two-phase flow, passes through the second reservoir 11 and the condenser 4, enters the defrosting heat exchanger 3, exchanges heat with the high-temperature and high-pressure gas in the first circulation system, evaporates into low-temperature and low-pressure gas, and then enters the second compressor 9 for compression and completes the circulation.
In the defrosting process, the refrigerant absorbs heat from the other circulating system through the defrosting heat exchanger, so that heat absorption at the condenser is reduced, and temperature fluctuation of a heat supply user side is reduced.
Claims (3)
1. A double-system air source heat pump with a defrosting function comprises a first circulating system and a second circulating system, wherein the first circulating system comprises a first compressor, a first four-way valve, a first evaporator and a first gas-liquid separator;
it is characterized by also comprising a defrosting heat exchanger and a condenser,
in the first circulating system, a first interface of a first four-way valve is sequentially communicated with a first compressor, a first gas-liquid separator and a second interface of the first four-way valve, a third interface of the first four-way valve is sequentially communicated with a first evaporator and a condenser, and a fourth interface of the first four-way valve is sequentially communicated with a defrosting heat exchanger and the condenser;
in the second circulating system, a first interface of the second four-way valve is sequentially communicated with a second compressor, a second gas-liquid separator and a second interface of the second four-way valve, a third interface of the second four-way valve is sequentially communicated with a second evaporator and the condenser, and a fourth interface of the second four-way valve is sequentially communicated with the defrosting heat exchanger and the condenser.
2. The dual-system air source heat pump according to claim 1, wherein the defrosting heat exchanger is a plate heat exchanger, and the condenser is an air-cooled heat exchanger or a water-cooled heat exchanger.
3. The dual-system air source heat pump according to claim 1, wherein a first expansion valve and a first reservoir are disposed between the first evaporator and the condenser, and a second expansion valve and a second reservoir are disposed between the second evaporator and the condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122614313.4U CN216204464U (en) | 2021-10-29 | 2021-10-29 | Dual-system air source heat pump with defrosting function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122614313.4U CN216204464U (en) | 2021-10-29 | 2021-10-29 | Dual-system air source heat pump with defrosting function |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114719400A (en) * | 2022-04-18 | 2022-07-08 | 青岛海尔空调电子有限公司 | Air conditioner control method, system, device, medium and air conditioner |
| CN114719401A (en) * | 2022-04-18 | 2022-07-08 | 青岛海尔空调电子有限公司 | Air conditioner control method, system, device, medium and air conditioner |
| CN115451599A (en) * | 2022-09-08 | 2022-12-09 | 山东力诺瑞特新能源有限公司 | Air source heat pump continuous steam supply system and control method |
-
2021
- 2021-10-29 CN CN202122614313.4U patent/CN216204464U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114719400A (en) * | 2022-04-18 | 2022-07-08 | 青岛海尔空调电子有限公司 | Air conditioner control method, system, device, medium and air conditioner |
| CN114719401A (en) * | 2022-04-18 | 2022-07-08 | 青岛海尔空调电子有限公司 | Air conditioner control method, system, device, medium and air conditioner |
| CN115451599A (en) * | 2022-09-08 | 2022-12-09 | 山东力诺瑞特新能源有限公司 | Air source heat pump continuous steam supply system and control method |
| CN115451599B (en) * | 2022-09-08 | 2024-03-26 | 山东力诺瑞特新能源有限公司 | Air source heat pump continuous steam supply system and control method |
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Effective date of registration: 20221116 Address after: 201109 Building 1, No. 600, Jianchuan Road, Minhang District, Shanghai Patentee after: Shanghai nuotong New Energy Technology Co.,Ltd. Address before: 250103 30766 Licheng Road, Licheng District, Ji'nan, Shandong, 30766 Patentee before: SHANDONG LINUO PARADIGMA Co.,Ltd. |
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