AIR HEATING AND COOLING DEVICE

摘要

FIELD: mechanical engineering. SUBSTANCE: distribution of gas is effected by means of spool valves arranged inside expansion reducer valve and changed over by covers of bellows. Gas exchange passages are made in form of heat exchanger with opposite flows of working medium and air. Closed cavities of housing have exhaust valves for self- evacuation of chambers. EFFECT: perfect tightness of gas distributing device, enhanced efficiency due to avoidance of spurious spaces and improved heat exchange between working heat and air. 2 cl, 2 dwgs