| 摘要 |
PROBLEM TO BE SOLVED: To obtain a refrigerator oil which is used in the refrigeration cycle of an air conditioner using an HFC refrigerant and has an improved returnability from a heat exchanger to a compressor and a decreased saturation water content. SOLUTION: A hydrocarbon oil (A) which is incompatible with an HFC refrigerant but has a low moisture absorption (e.g. an alkylbenzene or a mineral oil) is mixed with a cyclic ether (B) as an oily flowability improver compatible with both the hydrocarbon oil and the HFC refrigerant, giving the objective refrigerator oil. |
