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The contemporary industry places requirements to them for achieving temperatures lower than -100°C, for example in the liquefaction of gases; liquefaction of air, followed by separation of its components (nitrogen, oxygen, argon, neon, helium, xenon); usage of cryogenic temperatures in medicine. Obtain such low temperatures is associated with a number of problems associated with increase of energy consumption, with the construction of the refrigeration machine such as a minimum possible pressure of the suction compressor which can practically ensure. The report provides an analysis of the working principle of cascading refrigeration and used refrigerants, according to updates of the existing legislation. Study for conducted researches on getting low temperatures by using cascaded machines and combinations of various refrigerants is made.

ANALYSIS OF THE CONSTRUCTION AND OPERATION OF THE CASCADE REFRIGERATION