Heat pump system based on open type cold water solidification heat exchanger

Abstract

The invention discloses a heat pump system based on an open type cold water solidification heat exchanger. The heat pump system comprises a refrigerant circulation loop, a heating circulation loop, acondenser and an evaporator. The heat pump system is characterized in that the heat pump system further comprises a cold water pipeline, a refrigerant heat exchange circulation loop, the open type cold water solidification heat exchanger, a deicing loop and a deicing heat exchanger; the cold water pipeline carries out heat exchange with the refrigerant heat exchange circulation loop through the open type cold water solidification heat exchanger; the refrigerant heat exchange circulation loop carries out heat exchange with the refrigerant circulation loop through the evaporator; the deicing loop carries out heat exchange with the heating circulation loop through the deicing heat exchanger; a heated refrigerant deices for the open type cold water solidification heat exchanger; and the inletend of a circulation water channel of the condenser communicates with a first pipeline and the outlet end of a circulation water channel in the deicing heat exchanger at the same time. With the adoption of a deicing mode combing heating medium ice melting and gravity deicing, the deicing velocity is high, deicing is thorough, power consumption is little, solidification heat of cold water is continuously extracted and is supplied into a room, and long-term, efficient and stable operation of a unit can be ensured.

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...

AI Technical Summary

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

Images