WORKING MIXTURE FOR REFRIGERATOR SYSTEMS Russian patent published in 1998 - IPC

FIELD: cooling mixtures. SUBSTANCE: ozone-safety working mixture has the following components, mole%: 1,2,2,2-tetrafluoroethane (R134a), 5-90; lower alkane, 5-20, and octafluoropropane (R218); the balance. Binary mixtures of n-butane and iso-butane or n-pentane and iso-pentane or individual substances - propane, butane or pentane are used as a lower alkane source. EFFECT: enhanced quality of mixture. 2 cl, 4 tbl, 1 dwg