| abstract |
Refrigerating machine oil and chiller operation capable of achieving both high stability and wear resistance in the presence of an unsaturated fluorinated hydrocarbon refrigerant in a refrigeration system using an unsaturated fluorinated hydrocarbon refrigerant Providing a fluid composition. The refrigerating machine oil of the present invention contains a base oil containing an ether compound, an amine salt of an acidic phosphate ester, an amine antioxidant, a metal deactivator and an alicyclic epoxy compound, and is acidic. The content of the amine salt of phosphate ester is 400 mass ppm or more based on the total amount of refrigerating machine oil, and is used together with an unsaturated fluorinated hydrocarbon refrigerant. The working fluid composition for a refrigerator according to the present invention contains a base oil containing an ether compound, an amine salt of an acidic phosphate ester, an amine antioxidant, a metal deactivator, and an alicyclic epoxy compound. The content of the amine salt of acidic phosphate ester is 400 mass ppm or more based on the total amount of the refrigerating machine oil. [Selection figure] None |