| 摘要 |
PROBLEM TO BE SOLVED: To provide a working fluid composition for refrigerators, which can achieve compatibility and thermal-chemical stability without needing the large change of an existing system, in a freezing system using a refrigerant containing hydrocarbons, difluoromethane and unsaturated fluorinated hydrocarbons.SOLUTION: A working fluid composition for refrigerators contains a mixed refrigerant comprising a hydrofluoroethane represented by general formula (A): CHF, difluoromethane and 2,3,3,3-tetrafluoropropene, and at least one base oil selected from polyol esters, polyvinyl ethers and polyalkylene glycol compounds, wherein the carbon/oxygen molar ratio of the base oil is 2.5-5.8. |
