| abstract |
The present invention provides a kind of working fluid composition for refrigerating machine, contains: refrigerator oil, ester, carbodiimide compound and phosphorus compound containing polyalcohol and fatty acid；With, refrigerant, for selected from 1,1,1,2- tetrafluoroethane and 2,3,3, it is at least one kind of in 3- tetrafluoropropene, polyalcohol contains pentaerythrite and dipentaerythritol, and fatty acid contains at least one kind of in the fatty acid selected from carbon number 4~9, and carbodiimide compound and phosphorus compound meet condition shown in formula (1).[respectively, N C Indicate the quantity of the carbodiimide in every 1 molecule of carbodiimide compound, M C Indicate the molecular weight of carbodiimide compound, W C Indicate the content of carbodiimide compound, N P Indicate the quantity of the phosphorus atoms in every 1 molecule of phosphorus compound, M P Indicate the molecular weight of phosphorus compound, W P Indicate the content of phosphorus compound.] |