| 摘要 |
PROBLEM TO BE SOLVED: To provide a composition comprising pentafluoroethane, 1,1,1,2- tetrafluoroethane and dimethyl ether, its use in air cooling and/or air conditioning, and a heat transfer system comprising the composition. SOLUTION: The composition consists essentially of 55-94% of R-125, 2.5-35% of R-134a and 3.5-25% of DME. This composition is used as a refrigerant in a heat transfer system designed for R-22 and comprising as a lubricant a mineral oil or an alkylbenzene. |
