DISPLACEMENT CONTROL METHOD AND DEVICE FOR VARIABLE DISPLACEMENT COMPRESSOR

摘要

PROBLEM TO BE SOLVED: To suppress the generation of clashing sound in the maximum or minimum inclining angle position of a swash plate. SOLUTION: When current supply to an electrical displacement control valve 39 is started by the ON operation of an air conditioner operation switch 44, a control computer C1 performs buffering current supply starting control for gradually increasing the value of a current supplied to the solenoid 43 of the displacement control valve 39 from a zero supply current value to a specified supply current value. When current supply to the electrical displacement control valve 39 is stopped by the OFF operation of the air conditioner operation switch 44, the control computer C1 performs buffering current supply stopping control for gradually reducing the value of a current supplied to the solenoid 43 of the displacement control valve 39 from the specified supply current value immediately before the turning-OFF of the air conditioner operation switch 44 to the zero supply current value.