| abstract |
(57) [Summary] [Object] To provide a refrigerating machine oil composition having excellent wear resistance. [Structure] A base oil containing an oxygen-containing compound as a main component and a general formula based on the total amount of the composition: 0.5 to 5.0% by weight of the orthophosphoric acid ester represented by the general formula: The halogenated phosphoric acid ester represented by % By weight and / or the general formula: An acidic phosphate ester represented by or an amine salt thereof, Alternatively, a refrigerating machine oil composition for a fluorinated alkane refrigerant, which comprises 0.01 to 2.0% by weight of both of them. |