abstract |
The present invention contains a refrigerant oil containing an ester of a polyhydric alcohol and a fatty acid, an epoxy compound and a phosphorus compound, and a fluoropropene refrigerant, and the polyhydric alcohol constituting the ester contains pentaerythritol and dipentaerythritol, and the ester The fatty acid constituting the contains at least one selected from fatty acids having 4 to 9 carbon atoms, and the epoxy compound and the phosphorus compound satisfy the conditions represented by the following equation (1), providing a working fluid composition for a refrigerator. |