REFRIGERANT FLUID DEVICE FOR INCREASING THERMODYNAMIC PERFORMANCE Russian patent published in 2019 - IPC F25B30/02 F25B9/06 F25B31/00 

FIELD: cooling or freezing equipment.

SUBSTANCE: invention relates to heat pumps. In the method, a closed circuit contains a refrigerant fluid and a lubricant miscible with the refrigerant fluid. Said closed circuit contains fluid compressor (1) and a fluid return circuit for returning fluid to the compressor. Said compressor is located in the closed circuit between the fluid inlet and the fluid outlet. Said fluid return circuit is in the closed circuit in addition to the compressor between the fluid outlet and the fluid inlet and contains condenser (2), expander (3) and evaporator (4). Said fluid return circuit contains a first pipe passing between the fluid outlet and the condenser, a second pipe passing between the condenser and the expander, a third pipe extending between the expander and the evaporator and a fourth pipe extending between the evaporator and the fluid inlet. Said closed circuit contains first bulge (5) of the pipe of the return circuit, containing tubes (50), and the fluid contains a mixture of a first freon R32 (difluoromethane), a second freon R125 (pentafluoromethane) and a third freon R134a (1,1,1,2-tetrafluoroethane), and the lubricant contains synthetic polyester oil.

EFFECT: increased thermodynamic efficiency of the heat pump.

14 cl, 1 dwg