FIELD: cryogenic systems. SUBSTANCE: air is compressed in compressor and after cleaning it from admixtures air is cooled in counter-current heat exchanger and is expanded in throttle valve. Liquid air thus obtained is drained into reservoir. Non-condensed air is discharged to counter-current heat exchanger through gaseous air line via intake device; then air is discharged to expansion reservoir through throttle valve and condenser of Stirling refrigerating machine through throttle valve. Liquefied air is drained to Dewar flask and is fed to reservoir by means of high- pressure pump through check valve. EFFECT: enhanced efficiency; increase of liquefaction coefficient to 100%. 2 cl, 1 dwg
