COLD PRODUCING METHOD Russian patent published in 2003 - IPC

FIELD: designing of gas refrigeration machines with valve type control of flow of working fluid operating with use of reverse thermodynamic cycle, possibly designing of simple machines reliable in operation. SUBSTANCE: method comprises steps of compression of working fluid in compressor and passing it through refrigerator at temperature almost equal to environment temperature and then supplying working fluid to cavity of chamber for recovering residual cold where fluid gives excess heat. Feeding of cold working fluid after freezing chamber into cold recovering apparatus (counter-current heat exchanger) provides lowered heat loss, lowered hydrodynamic resistances and also increased temperature at inlet of receiving cavity of compressor. EFFECT: enhanced percentage cold production factor due to increased quantity of heat taken off after compression of working fluid in compressor at increased temperature at inlet of compressor and due to additionally cooling it after refrigerator until temperature lower than that of environment. 2 dwg