Patent ID: 6637222
Filing Date: 2003-10-28
Classification: F04C,F24F,F25B,Y02B

Abstract:
A system for controlling starting operation of an air conditioner, comprising:a compressor controlled in a pulse width modulation manner according to a duty control signal; an electronic expansion valve for expanding refrigerant compressed in said compressor; a high pressure conduit connecting the exit side of said compressor and the inlet side of said electronic expansion valve; a low pressure conduit connecting the exit side of said electronic expansion valve and the inlet side of said compressor; a bypass conduit connected at its first end to said high pressure conduit and at its second end to said low pressure conduit; a flow rate regulating valve mounted on said bypass conduit for regulating a flow rate of fluid flowing through said bypass conduit; and a control unit for controlling said electronic valve, said flow rate regulating valve and said compressor during a starting operation of said compressor in such a way that said electronic expansion valve is closed, said flow rate regulating valve is open and said compressor being controlled by a duty control signal having a period shorter than a period of a duty control signal for a normal operation.