FIELD: system for air supply. SUBSTANCE: device has vortex pipe 1 with jacket 4 and cyclone 7. Tangential branch pipe 8 of cyclone 7 is connected with branch pipe 3 for discharging cold gas of pipe 1 through pipe line 9. Exhaust pipe 10 is connected with branch pipe 5 of jacket 4 through pipe line 11. Perforated sleeve 12 is mounted at the bottom end of exhaust pipe 10 for permitting rotation. EFFECT: enhanced efficiency. 1 dwg
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