Control method of enhanced vapor injection air conditioning system

Abstract

The invention discloses a control method of an enhanced vapor injection air conditioning system, and relates to the technical field of air conditioning so as to solve the technical problem that in a related technology, during reinflation operation of an air conditioning system, a compressor is subjected to control step out or is prone to breaking down. The embodiment of the invention provides thecontrol method of the enhanced vapor injection air conditioning system. The control method comprises the steps that a compressor is started under a heating reinflation mode; a refrigerant actual temperature of an air suction port of a flasher is obtained in real time, and a first temperature difference is determined according to the refrigerant actual temperature and a corresponding refrigerant target temperature; and whether the first temperature difference is smaller than a first threshold value M or not is judged, if yes, a solenoid valve is opened, if no, the opening degree of a first throttle valve and a second throttle valve is adjusted according to the first temperature difference, an adjusted refrigerant actual temperature is obtained so as to determine a second temperature difference between the adjusted refrigerant actual temperature and the refrigerant target temperature, and the solenoid valve is opened when the second temperature difference meets a first preset condition.The control method can be used for air conditioning.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a control method for an air-injection enthalpy-increasing air-conditioning system. Background technique [0002] With the development of science and technology, jet enthalpy air conditioning system has been widely used. [0003] In related technologies, an air-injection enthalpy-increasing air-conditioning system includes a compressor, a flasher, an indoor heat exchanger, an outdoor heat exchanger, a first throttle valve, a second throttle valve, and a solenoid valve. Among them, the first throttle valve is connected between the flasher and the indoor heat exchanger, the second throttle valve is connected between the flasher and the outdoor heat exchanger, and the solenoid valve is connected between the flasher and the compressor . When the air-injection enthalpy-increasing air-conditioning system is running in the air supply mode, the compressor can be supplied with a...

AI Technical Summary

Problems solved by technology

[0004] However, at the moment when the electromagnetic valve is suddenly opened, a large amount of refrigerant will pour into the compressor, which will easily cause a sudden change in the overall power of the compressor, resulting in out-of-step control or failure of the compressor.

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