| 主权项 |
1. A working fluid composition for a refrigerator machine, comprising:
a refrigerating machine oil comprising a base oil containing an ether-based compound selected from the group consisting of a polyalkylene glycol represented by the following formula (2), (3), (5), (6), (7) or (8), a polyvinyl ether, a polyphenyl ether and a perfluoroether,
CH3O—(C3H6O)h—CH3 (2)wherein h represents an integer of 6-80,
CH3O—(C2H4O)i —(C3H6O)j—CH3 (3)wherein i and j are each 1 or greater, and are numbers such that the total of i and j is 6-80,
CH3O—(C3H6O)1—H (5)wherein 1 represents an integer of 6-80,
CH3O—(C2H4O)m—(C3H6O)n—H (6)wherein m and n are each 1 or greater, and are numbers such that the total of m and n is 6-80,
C4H9O—(C2H4O)m—(C3H6O)n—H (7)wherein m and n are each 1 or greater, and are numbers such that the total of m and n is 6-80,
CH3COO —(C3H6O)1—COCH3 (8) wherein, 1 represents an integer of 6-80, wherein the content of the ether-based compound is at least 70% by mass based on the total amount of the refrigerating machine oil, a carbodiimide compound, and an unsaturated fluorinated hydrocarbon refrigerant. |
