NONFLAMMABLE COOLING COMPOSITION FOR REFRIGERATING DEVICES Russian patent published in 1997 - IPC

FIELD: refrigerating devices. SUBSTANCE: nonflammable cooling composition on the base of cooling agent which is chosen of chlorodifluoromethane R 22 and pentafluoroethane additionally comprises coolant chosen of octafluropropane R 218 and R 125 and up to 15 mass % of propane. Additionally composition may comprise mixture which comprises, mas.%: R 22, 65-75; R 125, 15-25; propane, 5-15; or mixture which comprises, mas.%: R 22, 83-93; R 218, 3-9; propane, 3-9; or mixture which comprises, mas.%: R 125, 80-90; R 218, 5-15; propane, 3-10. EFFECT: improved ecologic features. 4 cl, 7 dwg