Heat pump system based on open cold water solidification heat exchanger
A heat pump system and heat exchanger technology, applied in heat pumps, refrigerators, refrigeration components, etc., can solve problems such as difficult operation and maintenance, lower room temperature, and poor indoor comfort.
Active Publication Date: 2020-05-29
NORTHEAST DIANLI UNIVERSITY
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Problems solved by technology
[0004] Chinese patent application number "2006100096160", the patent titled "cold water solidification heat collection device", removes the ice layer generated when the cold water in the tube is exchanged with ethylene glycol outside the tube by setting Jiaolong scraper in the heat exchange tube Although the mechanical energy consumption of this technical solution for scraping ice is small, the mechanical process required for its production is complicated, and the processing accuracy is high, and it is easy to damage the auger scraper and heat exchange tube during the ice scraping process, causing its operation and maintenance. Difficult and expensive
The disadvantage of this technical solution is that the four-way valve needs to be reversed when deicing (similar to the reverse cycle defrosting principle of the air-cooled heat pump), which will reduce the room temperature of the hot users (about 5°C), and the indoor comfort is poor. Frequent switching of the unit will lead to poor stability of the unit operation and reduce its service life
At the same time, the existence of the spray device will also increase the power consumption of the water pump.
[0007] The Chinese patent application number is "2015106093894", and the patent titled "a coagulation hot water source heat pump system suitable for low temperature environment" also has the problem of "four-way valve reversing", and the technical solution is deicing due to ice The contact area between the layer and the heat exchange tube is large, the ice layer is not easy to fall off, and the power consumption required for deicing is large
Method used
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Embodiment 4
[0112] Embodiment 4. The heat pump system based on the open cold water solidification heat exchanger in this embodiment 4 is basically the same in structure and working process as the heat pump system based on the open cold water solidification heat exchanger in Embodiment 1. The difference is that The ninth solenoid valve 13 and the eleventh solenoid valve 11 are replaced by the first electric three-way valve; the fifth solenoid valve 9 and the seventh solenoid valve 7 are replaced by the second electric three-way valve; The third solenoid valve 20 is replaced by the third electric three-way valve; the eighth solenoid valve 27 and the tenth solenoid valve 32 are replaced by the fourth electric three-way valve; the fourth solenoid valve 30 and the sixth solenoid valve 28 are replaced by the fifth electric three-way valve valve instead.
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The invention is a heat pump system based on an open cold water solidification heat exchanger, which includes a refrigerant circulation loop, a heating circulation loop, a condenser and an evaporator, and is characterized in that it also includes a cold water pipeline, a refrigerant heat exchange circulation loop, An open cold water solidification heat exchanger, a deicing circuit and a deicing heat exchanger, the cold water pipeline and the refrigerant heat exchange cycle exchange heat through the open cold water solidification heat exchanger, the refrigerant heat exchange cycle and the refrigerant cycle Through the heat exchange of the evaporator, the deicing circuit and the heating circulation circuit exchange heat through the deicing heat exchanger, and the heated refrigerant is deiced by the open cold water solidification heat exchanger. It communicates with the outlet end of the circulating water channel in the deicing heat exchanger. It adopts the combination of heat medium melting and gravity deicing to deicing, the deicing speed is fast, the deicing is complete and the power consumption is small, it can realize the continuous extraction of the solidification heat of cold water for indoor heating, and at the same time, it can ensure that the unit maintains high efficiency and stability for a long time run.
Description
technical field [0001] The invention relates to the field of heat pump air conditioners, in particular to a heat pump system based on an open cold water solidification heat exchanger. Background technique [0002] Water source heat pump is an energy-saving device that uses heat pump technology to obtain low-grade heat from water sources (such as surface water, groundwater, domestic sewage, etc.) to provide heating and cooling for buildings. Compared with conventional fossil fuel combustion heating, it is not only environmentally friendly No pollution, and high efficiency, the general COP is around 4, which has a great market advantage. For surface water source heat pumps, it is well known that the temperature of surface water will drop as the outdoor air temperature drops. Studies have shown that when the temperature of the outdoor air reaches -10°C, the temperature of the surface water is only 4°C. Obviously, such a temperature The surface water has almost no sensible heat...
Claims
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IPC IPC(8): F25B30/02F25B41/04F25B47/02F25B41/20
CPCF25B30/02F25B47/02F25B41/20
Inventor邱国栋赵洪运林兴伟梁云
OwnerNORTHEAST DIANLI UNIVERSITY