Patent ID: 6526771
Filing Date: 2003-03-04
Classification: B60H,F04B,F25B

Abstract:
A freezing cycle apparatus that switches between a cooling mode and a heating mode, wherein a low-pressure refrigerant is evaporated in an evaporator for cooling air during said cooling mode and a gas refrigerant from a discharge side of a compressor is introduced into said evaporator for heating during said heating mode, said freezing cycle apparatus comprising:flow rate determining means for determining target flow rates of refrigerant in said cycle during heating and cooling modes; flow rate detecting means for detecting the refrigerant flow rates during said heating mode and during said cooling mode; said compressor being a variable displacement compressor; displacement control means for controlling the displacement of said compressor so that the refrigerant flow rate detected by said flow rate detecting means is said target flow rate; and wherein displacement of said compressor is controlled such that the refrigerant flow rate in a cycle that circulates refrigerant for said cooling mode and said freezing mode reaches a predetermined target flow rate during said cooling mode or said heating mode.