OPERATION CONTROL SYSTEM FOR VARIABLE DISPLACEMENT TYPE COMPRESSOR

摘要

PURPOSE: To provide a variable displacement swash plate type compressor which is to prevent the occurrence of frosting as the rapid fluctuation of load torque is suppressed. CONSTITUTION: A swash plate 14 inclinably supported on a rotary shaft 8 is controlled through regulation of a pressure in a crank chamber 2-1. When an electromagnetic on-off valve 28 is demagnetized, high pressure refrigerant gas in a delivery chamber 3-2 is fed to a crank chamber 2-1 and the inclination angle of the sash plate is transferred from a maximum inclination angle to a minimum inclination angle. An opening closing mechanism 36 located on a suction intake passage 29 opens and closes a suction passage 29 according to a differential pressure between a pressure in an external refrigerant passage 30 situated upper stream therefrom and a pressure in suction chamber 3-1. When the inclination angle of the swash plate is minimized, the suction passage 29 is closed by the opening and closing mechanism 36.