Variable displacement compressor control device and refrigeration cycle variable displacement control device

摘要

Optimal under different conditions while improving the efficiency of the compressor in a configuration in which the control chamber pressure is controlled using a control valve that is electrically controlled by an external control signal without using a pressure sensitive member. It is an object of the present invention to provide a variable capacity compressor control device and a refrigeration cycle variable capacity control device capable of obtaining a high level of responsiveness and stability, and enabling the supply of pressure from the discharge space 27 to the crank chamber 24. At the same time, the pressure control valve 2 enabling discharge of the pressure from the crank chamber 24 to the suction space 26 is electrically controlled by an external control signal to adjust the crank chamber pressure and control the discharge capacity. The variable capacity compressor 3 is provided, and the gain of the arithmetic expression for calculating the control signal is changed based on the magnitude of the physical quantity that affects the air conditioning state.