| abstract |
The present invention relates to a refrigerating machine oil containing a refrigerator oil containing an ester of a polyhydric alcohol and a fatty acid, an epoxy compound and a phosphorus compound, and a fluoropropene refrigerant, wherein the polyhydric alcohol constituting the ester contains pentaerythritol and dipentaerythritol, Wherein the fatty acid constituting the refrigerant composition contains at least one kind selected from fatty acids having 4 to 9 carbon atoms and the epoxy compound and phosphorus compound satisfy the condition represented by the following formula (1). |