Patent ID: 8117858
Filing Date: 2012-02-21
Classification: F04B,F24F,F25B

Abstract:
1. An air conditioner comprising a variable displacement compressor and a controller, wherein the variable displacement compressor comprises a control valve provided with a valve body, a pressure sensitive mechanism for sensing the lower pressure side pressure of a refrigerating cycle acting to force the valve body and a solenoid for forcing the valve body based on an input electric current, position of the control valve is controlled to vary internal pressure of a control chamber, thereby variably controlling the displacement of the variable displacement compressor, and the controller controls the input electric current to the solenoid to control the position of the control valve, and wherein operation of the air conditioner is switchable between cooling mode and heating mode using highly pressurized hot gas in the refrigerant cycle, and wherein during the cooling mode operation the controller controls the input electric current to the solenoid to operate the control valve based on the lower pressure side pressure of the refrigerant cycle acting on the pressure sensitive mechanism and the quantity of the input electric current to the solenoid, and during the heating mode operation controls the input electric current to the solenoid to operate the control valve based not on the lower pressure side pressure of the refrigerant cycle acting on the pressure sensitive mechanism but only on the quantity of the input electric current to the solenoid.