| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigerator oil having excellent suitability for 1-chloro-3,3,3-trifluoropropene (1233zd) coolant, and a working fluid composition for refrigerators comprising the refrigerator oil.SOLUTION: A refrigerator oil comprises at least one oxygen-containing oil with a carbon/oxygen molar ratio of 2.5 or more and 5.8 or less as a base oil, and is used with 1-chloro-3,3,3-trifluoropropene coolant. |
