Abstract: This paper discussed some topics of the high frequency start of the compressor, based on the variable frequency air conditioner which uses high frequency startup compressor. with the Simulink simulation analysis and actual test results, to optimize the PID parameters and determine the compressor high frequency starting drive control parameters. With the test verification and analysis, the frequency adaptive control factors after the compressor high frequency start are given, and the characteristics of the cooling medium flow demand in this stage are pointed out, and the expansion control scheme of the expansion valve is determined. This paper summarizes the reasonable and reliable design scheme of the compressor high frequency starting. It can ensure the long-term operation of the unit while achieving the effect of fast cooling and heating of the air conditioner.

Key words: Air conditioning, Quick cooling and quick heat, High frequency start-up