VARIABLE CAPACITY COMPRESSOR, AIR CONDITIONER WITH VARIABLE CAPACITY COMPRESSOR, AND CONTROL METHOD IN VARIABLE CAPACITY COMPRESSOR

摘要

PROBLEM TO BE SOLVED: To provide effective techniques for favorably controlling the pressure in a power chamber and its related techniques in a variable capacity compressor controlling the capacity by a capacity control valve. SOLUTION: In this swash plate type variable capacity compressor 101, control means 203 controls to prevent Pc increase using an outside air temperature as a pressure increase factor. In the Pc increase prevention control, at first, the outside air temperature t and a delivery pressure Pd is read (step S1) and a Pd upper limit value Pm corresponding to the outside temperature t is obtained (step S20). Then, the delivery pressure Pd and the Pd upper limit value Pm are compared (step S30) and, when the delivery pressure Pd is larger, the present control current value I of the capacity control valve 181 is obtained and a control current value In lower than the present control current value I is set (step S40). A control signal is outputted to the variable control valve 181 based on the control current value In (step S50).