Air-injection enthalpy-increasing heat pump air-conditioning system, control method, control device, and air conditioner

Abstract

The present invention provides an air-injection enthalpy-increasing heat pump air conditioning system, a control method, a control device and an air conditioner, wherein the air-injecting enthalpy-increasing heat pump air-conditioning system includes: a compressor, including an exhaust port, an injection port and an air return port; a reversing assembly , including the first valve port to the fourth valve port; the outdoor heat exchanger; the first heat exchanger and the first solenoid valve, the first heat exchanger includes the first heat exchange flow path and the second heat exchange flow path; the second A heat exchanger and a second electromagnetic valve, the second heat exchanger includes a third heat exchange flow path and a fourth heat exchange flow path, the first end of the third heat exchange flow path is connected to the second end of the second heat exchange flow path end, the second end of the third heat exchange flow path is connected to the second end of the first electromagnetic valve, the first end of the fourth heat exchange flow path and the third valve port of the reversing assembly are connected to the second end of the second electromagnetic valve The first end, the second end of the second electromagnetic valve is connected to the first end of the first heat exchange flow path; and the gas-liquid separator. Through the technical scheme of the invention, the compressor can be prevented from running wet when the air conditioner is defrosting.

Description

technical field [0001] The present invention relates to the technical field of refrigeration and air conditioning, in particular to an air-injection enthalpy-increasing heat pump air-conditioning system, a control method for the air-injection enthalpy-increasing heat pump air-conditioning system, a control device and an air conditioner for the air-injection enthalpy-increasing heat pump air-conditioning system. Background technique [0002] When the air conditioner operates in the heating mode in winter, the outdoor ambient temperature is low, the temperature of the outdoor condenser is low, and frost occurs on the outdoor condenser, which reduces the heating effect. The outdoor condenser can be defrosted to improve the reliability and heating effect of the heat pump air conditioning system of the air conditioner during operation. [0003] In the related defrosting scheme, when the air conditioner does not stop, adjust the frequency of the compressor, and then switch to the ...

AI Technical Summary

Problems solved by technology

At the beginning of defrosting, the frequency of the compressor decreases, and the refrigerant flowing out of the gas-liquid separator decreases, resulting in an increase of liquid refrigerant in the gas-liquid separator; The ambient temperature is low and the condensation effect is good. As a result, during the defrosting process, the discharge and suction air temperature of the compressor is low, the superheat of the suction air is low, and the compressor is in a wet running state. In severe cases, the compressor will suffer from oil shortage and liquid shock. Seriously affect the service life of the compressor and reduce the reliability of the air conditioner operation

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