Heat pump air conditioner

Abstract

The invention discloses a heat pump air conditioner with a two-way heat return function, which comprises a compressor, an electromagnetic four-way valve, a heat exchanger A, a heat exchanger B and a compressor suction pipe, wherein a heat return throttling device with the functions of throttling and two-way heat return is arranged between the heat exchanger A and the heat exchanger B. Through the heat return throttling device, the heat pump air conditioner can realize two-way heat return, and the cooling and the heating performances as well as the energy efficiency of the heat pump air conditioner are improved. The heat return throttling device comprising a throttling element, a cooling regenerator and a heating regenerator has the advantages of simple structure and cost saving. Cooling capillaries and heating capillaries are wound on the outer wall of the compressor suction pipe, or the heat return throttling device comprising the cooling capillaries and the heating capillaries is arranged in the chamber of the compressor suction pipe so as to perform the functions of throttling and heat return, which can increase the heat return efficiency and reduce the cost. The invention is suitable for popularization and application in the field of air conditioners.

Description

Heat pump air conditioner technical field The invention relates to the field of air conditioner equipment, in particular to a heat pump air conditioner. Background technique Existing heat pump air conditioner includes compressor, electromagnetic four-way valve, heat exchanger A (condenser when cooling, evaporator when heating), heat exchanger B (condenser when heating, evaporation when cooling) device), throttling element, the electromagnetic four-way valve communicates with the compressor, heat exchanger A, and heat exchanger B through air pipes, heat exchanger A and heat exchanger B communicate through air pipes, and the throttling element is set on heat exchanger A between heat exchanger B. At present, in order to increase the subcooling degree of the refrigerant before throttling, reduce the superheat degree of the evaporator outlet, minimize the temperature difference of the refrigerant before and after throttling, reduce the throttling loss, and improve the performa...

AI Technical Summary

Problems solved by technology

At present, in order to increase the subcooling degree of the refrigerant before throttling, reduce the superheat degree of the evaporator outlet, minimize the temperature difference of the refrigerant before and after throttling, reduce the throttling loss, and improve the performance of the air conditioner, one solution is to use a larger The heat exchanger allows the refrigerant to reach a higher degree of supercooling after heat exchange through the heat exchanger. This solution requires an increase in the cost of the heat exchanger, which greatly increases the cost of the heat pump air conditioner; another solution is to use a heat recovery The method is to let the low-temperature gaseous refrigerant at the outlet of the evaporator and the high-temperature liquid refrigerant at the outlet of the condenser perform heat exchange, so as to reduce the temperature of the high-temperature liquid refrigerant and thereby increase the subcooling degree of the refrigerant. The specific method is: between heat exchanger A and heat exchanger B A regenerator is set between them, and the regenerator is set in series with the throttling element. The regenerator communicates with the compressor and the electromagnetic four-way valve through the compressor suction pipe. Since the reheating can only be performed before or during throttling In order to improve the subcooling degree of the refrigerant before throttling, reduce the superheat degree of the evaporator outlet, minimize the temperature difference of the refrigerant before and after throttling, reduce the throttling loss, and improve the performance of the air conditioner. Direct heat recovery, that is to say, it can only improve the cooling or heating performance of the heat pump air conditioner, and cannot achieve two-way heat recovery

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