Enhanced vapor injection heat pump air condition system, control method, control device and air conditioner

Abstract

The invention provides an enhanced vapor injection heat pump air condition system, a control method, a control device and an air conditioner. The enhanced vapor injection heat pump air condition system comprises a compressor, a reversing assembly, an outdoor heat exchanger, a first heat exchanger, a first electromagnetic valve, a second heat exchanger, a second electromagnetic valve and a gas-liquid separator, wherein the compressor comprises an exhaust port, a jet port and gas return port; the reversing assembly comprises a first valve port, a second valve port, a third valve port and a fourth valve port; the first heat exchanger comprises a first heat exchange flow path and a second heat exchange flow path; the second exchanger comprises 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, 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 both connected to the first end of the second electromagnetic valve; and the second end of the second electromagnetic valve is connected to the first end of the first heat exchange flow path. By the adoption of the technical scheme, wet operation of the compressor during defrosting of the air conditioner can be avoided.

Description

technical field [0001] The invention relates to the technical field of refrigeration and air conditioning, in particular to an air-jet enthalpy-enhanced heat pump air-conditioning system, a control method for the air-jet enthalpy-enhanced heat pump air-conditioning system, a control device for the air-jet enthalpy-enhanced heat pump air-conditioning system, and an air conditioner. 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 the outdoor condenser is prone to frost, 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 relevant defrosting scheme, when the air conditioner does not stop, the frequency of the compressor is adjusted, and then the four-way valve is switched 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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