| 摘要 |
PURPOSE: Refrigerant compositions are provided, which are suitable for refrigeration applications and to the use of such compositions in heat transfer devices such as refrigeration and air conditioning systems. CONSTITUTION: The refrigerant compositions comprise: (A) at least one compound selected from the group consisting of carbon dioxide (CO2) and the hydrofluorocarbons having a boiling point in the range of from -80 C to -400C; (B) at least one hydrofluorocarbon selected from the group consisting of 1,1,1,2-tetrafluoroethane (R-134a), 1,1,2,2-tetrafluoroethane (R-134) and 1,1-difluoroethane (R-152a); and (C) at least one hydrofluorocarbon selected from the group consisting of 1,1,1,3,3,3-hexafluoropropane (R-23 6fa) and 1,1,1,2,3,3-hexafluoropropane (R-236ea). The composition is useful as a refrigerant and used in automobile air conditioning and domestic refrigeration systems as a replacement for refrigerant R-12.
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