Novel phase change heat storage defrosting device for household air source heat pump system

Abstract

The invention relates to a novel phase change heat storage defrosting device for a household air source heat pump system, which is installed in a conventional household heat pump system and effectively improves defrosting efficiency and indoor comfort. The device comprises a phase change heat storage unit, a refrigerant bypass, an electromagnetic three-way valve I, an electromagnetic three-way valve II and a controller. The phase change heat storage unit is wrapped around a compressor to absorb and store the waste heat dissipated by the compressor. During defrosting, a high-temperature refrigerant enters an outdoor heat exchanger to perform defrosting, and a low-temperature refrigerant enters the phase change heat storage unit to absorb heat. Compared with the four-way reversing valve defrosting technology which is widely used in the household air source heat pump system, the novel phase change heat storage defrosting device realizes the recycling of waste heat of the compressor for the system, provides sufficient energy source for defrosting of the system, overcomes the defects of long defrosting time, large energy consumption and low indoor comfort of the four-way reversing valve, and has the advantages of compact structure, low cost, small modification to the structure of the original heat pump equipment, and the like.

Description

technical field [0001] The invention belongs to the technical field of human settlements, relates to the defrosting of household ventilation, cooling and heating equipment, and in particular to a phase-change heat storage defrosting device for a household air source heat pump system. Background technique [0002] Air source heat pumps have the advantages of dual cooling and heating, small footprint, energy saving, environmental protection, and convenience. However, the frosting problem is the main factor affecting the normal heating of the heat pump system in winter. Therefore, improving the defrosting performance is a necessary condition to promote the development of air source heat pump systems. The traditional defrosting method of the household air source heat pump system is the defrosting method of the four-way reversing valve, that is, the four-way reversing valve is reversing, the outdoor unit is used as the condenser, the indoor unit is used as the evaporator, and the...

AI Technical Summary

Problems solved by technology

However, due to the further optimization and improvement of the heat storage structure and the performance of heat storage materials, the phase change heat storage and defrosting technology is rarely used.

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