AIR CONDITIONER Russian patent published in 2018 - IPC F24F11/00 F25B43/02 F25B1/00 

FIELD: ventilation.

SUBSTANCE: present invention relates to an air conditioner that uses a non-azeotropic refrigerant mixture. Said air conditioner contains a compressor, a condenser, a decompression device, and the evaporator and the accumulator are connected by means of refrigerant pipes, wherein the refrigeration cycle uses not an azeotropic refrigerant mixture and a refrigeration oil; a controller that controls the degree of opening of the decompression device; a suction pipe that is a refrigerant pipe connected between the suction port of the compressor and the accumulator having an end portion on the accumulator side protruding into the accumulator; a first refrigerant temperature sensor that detects the temperature of the refrigerant flowing through the evaporator; and a second refrigerant temperature sensor that detects the temperature of the refrigerant flowing through the accumulator, wherein the suction pipe includes an oil return hole formed at a portion of the suction pipe disposed within the accumulator in a position higher than the central portion of the accumulator, and the controller is configured to control the degree of opening of the decompression device in such a way as to make a value obtained by subtracting the value determined by the first refrigerant temperature sensor from the value determined by the second refrigerant temperature sensor, less than 0 °C, and to make the degree of dryness of the refrigerant flowing into the accumulator, less than 1.

EFFECT: this avoids the reduction in performance of an air conditioner.

1 cl, 3 dwg