DEFROSTER OF REFRIGERANT CIRCUIT AND ROTARY COMPRESSOR FOR REFRIGERANT CIRCUIT

摘要

PURPOSE: A defroster of a refrigerant circuit and a rotary compressor for the refrigerant circuit are provided to prevent separation of a vane in defrosting of an evaporator and prevent deformation of a cylinder. CONSTITUTION: A defroster of a refrigerant circuit includes a rotary compressor(10) discharging a refrigerant gas, having been compressed by a first rotary compressing unit(32) into a hermetic vessel(12), and further compressing the discharged intermediate-pressure refrigerant gas in a second rotary compressing unit; a gas cooler(154) in which refrigerant discharged from second rotary compressing unit of the rotary compressor flows; a pressure reduction device connected to an outlet side of the gas cooler; and an evaporator(157) connected to an outlet side of the pressure reduction device. The first rotary compressing unit compresses refrigerant coming out from the evaporator. The rotary compressor has cylinders constituting the second rotary compressing unit; rollers eccentrically rotating in the cylinder; a vane dividing the inside of the cylinder into a low-pressure chamber and a high-pressure chamber by coming in contact with the roller; a spring member elastically supporting the vane to the roller side; and a back pressure chamber.