R 22 replacement refrigerant
AssigneeRefrigerant Products, Ltd.
InventorsRichard L. Powell, John Edward Poole, John Derek Capper, James Victor Thomas
Life of this patent
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Abstract
A refrigerant composition comprising a hydrofluorocarbon component including 1,1,1,2-tetrafluoroethane (HCFC 134a), the composition further comprising an additive selected from a saturated hydrocarbon or mixture thereof boiling in the range −5 to +70° C.
Claims20
A refrigerant composition comprising 1,1,1,2-tetrafluoroethane (R 134a), pentafluoroethane (R 125) and an additive selected from a saturated hydrocarbon or mixture thereof boiling in the range −5 to +70° C., wherein the weights of R 125 to R 134a are in the ranges:
- R 125 50-80% R 134a 50-20%.
A method of extending R 22 refrigerant in a refrigeration or air conditioning device, comprising:
- adding to an R 22 refrigerant in a refrigeration or air conditioning device a refrigerant composition having a hydrofluorocarbon component comprising difluoromethane (R 32), R 125 and R 134a, wherein the ratio of weights of R 32, R 125 and R 134a are in the ranges:
- R 32 18-28% R 125 20-30% R 134a 42-62%.
Dependencies are inferred from the claim text.