VARIABLE DISPLACEMENT COMPRESSOR AND COMPRESSOR CONTROL SYSTEMS HAVING THE SAME

摘要

PURPOSE: A variable capacity compressor and a compressor control system therewith are provided to reduce the vibration and noise of a capacity control valve by converting a PWM digital control signal into an analog control signal and controlling the capacity control valve. CONSTITUTION: A compressor control system with a variable capacity compressor comprises a compressor body(H), a controller(600), and a D/A converter(610). The compressor body controls the pressure of a crank chamber and has a capacity control valve(100) which controls the discharge capacity of refrigerants. The controller outputs a pulse width modulation digital control signal for controlling the capacity control valve. The D/A converter converts the PWM digital control signal into an analog control signal and applies the analog control signal to the capacity control valve.