U-SHAPED REFRIGERATING MACHINE WORKING BY STIRLING CYCLE Russian patent published in 1997 - IPC

FIELD: refrigerating engineering; gas regenerative refrigerating machines working by Stirling cycle. SUBSTANCE: during motion of piston 3, working gas is compressed in compression chamber 6 and moves at simultaneous motion of pistons 3 and 4 through double-pass tube bundles of refrigerator 11, regenerator 8, double-pass tube bundles of load heat exchanger 12 to expansion chamber 7 where it is expanded and cooled while piston continues its motion to bottom dead center. At reverse motion, gas gets heated cooling the working medium and under action of pistons 3 and 4 it moves to compression chamber 6 through regenerator 3 and refrigerator 11. EFFECT: enhanced efficiency. 1 dwg