Air source heat pump based on phase change energy storage type heat exchanger defrosting and control method thereof

Abstract

The invention discloses an air source heat pump based on phase change energy storage type heat exchanger defrosting and a control method thereof. A phase change energy storage type heat exchanger is additionally arranged behind a condenser of a heat pump circulating system in series. The air source heat pump specifically comprises an air cooling fin type evaporator, a four-way valve, a compressor, the condenser, the phase change energy storage type heat exchanger and a throttling valve which are sequentially connected. The air source heat pump further comprises a circulating water pump, an outer draught fan and a control unit; the control unit comprises a controller, a first temperature sensing probe, a second temperature sensing probe and a third temperature sensing probe; and the controller is electrically connected with the first temperature sensing probe, the second temperature sensing probe, the third temperature sensing probe, the circulating water pump and the outer draught fan through wires. By means of the above manner, according to the air source heat pump based on phase change energy storage type heat exchanger defrosting and the control method thereof, the refrigerant system phase change energy storage defrosting technology is adopted, and due to the fact that the phase change temperature point is stable and the heat storage amount is large, the problems of unstable heat supply, efficiency reduction and the like caused by air source heat pump defrosting can be solved.

Description

technical field [0001] The invention relates to the technical field of phase change energy storage and air source, in particular to an air source heat pump based on the defrosting of a phase change energy storage heat exchanger and a control method thereof. Background technique [0002] Air source heat pump heating is the most universal heating and energy-saving technology due to its high energy efficiency ratio, convenient installation and use, and has been widely used. [0003] However, the heating efficiency of the air source heat pump is greatly affected by the ambient temperature. When the ambient temperature is low, the heating capacity and heating efficiency of the air source heat pump will decrease; especially when the fin surface temperature of the outdoor tube-fin evaporator is lower than 0 °C , Frosting on the surface of the fins makes the heating performance of the air source heat pump drop sharply, which greatly limits the use of the air source heat pump. [00...

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention is to provide an air source heat pump and its control method based on the defrosting of the phase change energy storage heat exchanger, and adopt the phase change energy storage defrosting technology of the refrigerant system, because the phase change temperature point is stable, Large heat storage can solve the problems of unstable heating and efficiency drop caused by defrosting of air source heat pumps, which has application significance and broad market prospects

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