Air conditioner and electronic expansion valve opening control method during power-on thereof
A technology of electronic expansion valve and control method, which is applied in heating and ventilation control systems, refrigerators, heating methods, etc., and can solve the problems that electronic expansion valves cannot meet the requirements of rapid cooling and heating
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[0042] The rapid cooling and heating of existing air conditioners is achieved by increasing the frequency-up speed of the inverter compressor. Although the faster frequency-up speed can make the air conditioner achieve the required effect as soon as possible, it will greatly reduce the service life of the compressor. The specific analysis is as follows :
[0043] 1. In the cold start state, the compressor will increase the frequency faster. If the electronic expansion valve adopts a fixed initial opening, a large amount of liquid refrigerant will be quickly transferred to the indoor heat exchanger, and a large amount of liquid refrigerant will be sucked by the compressor. When the air port enters the compression chamber of the compressor, liquid compression occurs, and the pump body and exhaust valve plate will be damaged, which will affect the life of the compressor.
[0044] 2. Due to the liquid back phenomenon in 1 above, the liquid refrigerant and lubricating oil in the compres...
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