Air conditioner combining air supply compressor with indoor and outdoor auxiliary heat exchanger and method

Abstract

The invention discloses an air conditioner combining an air supply compressor with an indoor and outdoor auxiliary heat exchanger and a method. The air conditioner mainly comprises the compressor, a main gas-liquid separator, a four-way reversing valve, an indoor and outdoor main heat exchanger and a main electronic expansion valve. The indoor and outdoor auxiliary heat exchanger, an auxiliary electronic expansion valve and an auxiliary gas-liquid separator are additionally arranged by utilizing the function of an intermediate air supply compressor. In the refrigeration cycle process, the refrigerant with the middle pressure and high evaporation temperature is fully utilized, due to the fact that the evaporation temperature of the refrigerant is high, excessive dehumidification can be avoided, and indoor dryness is evaded. When a heat pump circulates, due to the fact that the throttling pressure and evaporation temperature of the part of refrigerant are high, frosting can be greatly delayed or even not formed on the surface of a heat exchange pipe subjected to heat exchanging with the part of refrigerant, and the high heat exchange efficiency is continuously maintained so that the system energy efficiency can be improved. In the defrosting period, defrosting water flowing down from the upper portion can be prevented from freezing on the lower portion of the outdoor heat exchanger, the defrosting time is shortened, and the defrosting efficiency and the heat supply efficiency of the heat pump are improved.

Description

technical field [0001] The invention relates to the field of heat pump air conditioners, in particular to an air conditioner and method combining an air supply compressor and an indoor and outdoor auxiliary heat exchanger. Background technique [0002] In order to improve the heating capacity of the heat pump air conditioner in the low temperature or even ultra-low temperature environment, a compressor that can supplement air in the middle is adopted, that is, a quasi-two-stage compression cycle, an economizer, and a small part of the refrigerant is used to throttle to The intermediate pressure and intermediate temperature can further reduce the temperature of the refrigerant at the outlet of the indoor heat exchanger (condenser). Under the condition that the volume flow rate of the compressor suction state remains constant, the flow rate of the refrigerant per unit mass in the outdoor heat exchanger (evaporator) can be increased. ) to improve the heating capacity in low tem...

AI Technical Summary

Problems solved by technology

However, its ability to improve refrigeration capacity and energy efficiency in refrigeration cycles is ignored, air conditioners are prone to excessive dehumidification problems, and frosting and defrosting problems also occur in heat pump cycles.

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