CASCADE REFRIGERATING MACHINE WITH TWO-COMPONENT MIXTURE OF REFRIGERANTS Russian patent published in 2024 - IPC F25B7/00 

FIELD: refrigerating equipment.

SUBSTANCE: cascade refrigerating machine consists of a circulation circuit of the upper branch of the cascade, in which a high-boiling component of the mixture of refrigerants circulates, and a circulation circuit of the lower branch of the cascade, in which low-boiling component of refrigerant mixture circulates. Refrigerating machine contains in-series located compressor, condenser, recuperative heat exchanger of direct and reverse flow for common mixture of refrigerants, recuperative heat exchanger of direct flow of mixture and return flow of low-boiling component, liquid separator, connected by liquid high-boiling coolant through throttle device of high-boiling component with evaporator-condenser, vapor outlet of high-boiling component from which is connected to inlet into reverse flow between recuperative heat exchangers. Low-boiling component vapor outlet from the liquid separator is connected in series with the evaporator-condenser, the direct flow of the additional recuperative heat exchanger, throttle device of low-boiling component, evaporator and reverse flow of additional recuperative heat exchanger.

EFFECT: refrigerating machine simplified design and higher efficiency.

1 cl, 1 dwg