Abstract
There are many different behaviors between the automobile air conditioning system of variable displacement compressor and fixed displacement compressor. This paper describes the continuous regulation of variable displacement of compressor by experiment method and from the variation of compressor rotation speed, evaporator load and discharge pressure it makes an analysis on the behavior of the system. It indicates that if system is matched inappropriately and runs out the regulating range of variable compressor, the advantages of variable displacement compressor cannot be externalized.