| 摘要 |
PROBLEM TO BE SOLVED: To provide a working fluid composition for a refrigerator and refrigerator oil capable of obtaining excellent abrasion resistance and maintaining sufficient low friction coefficient even under a stringent lubrication condition in coexistence with hydrocarbon refrigerant and excellent in power saving and long-term reliability.SOLUTION: The working fluid composition for a refrigerator is provided that contains: refrigerator oil containing at least one kind of lubricant base oil selected from mineral oil and synthetic oil, and at least one kind of phosphorus compound selected from mono(alkylphenyl)diphenyl phosphate having an alkyl group having 3 to 5 carbon atoms and di(alkylphenyl)diphenyl phosphate having two alkyl groups having 3 to 5 carbon atoms, the refrigerator oil having 0.01 to 5 mass% of the phosphorus compound content based on the total amount of the refrigerator oil; and a hydrocarbon refrigerant having 2 to 4 carbon atoms.SELECTED DRAWING: None |
