Patent ID: 8906250

Claim:
A composition, comprising a lubricating oil composition comprising a base oil; and an acid scavenger added to the base oil, and a refrigerant, wherein the acid scavenger is a polyalkylene glycol derivative having a PO added mol number of from 7 to 30 and selected from the group consisting of polypropylene glycol diglycidyl ether and polypropylene glycol monoglycidyl ether, the acid scavenger is present in an amount of 1 to 10 mass % per a total amount of the lubricating oil composition, the refrigerant consists of an unsaturated fluorohydrocarbon compound represented by formula (A) C p O q F r R s (A) where R is hydrogen, p is an integer of 2 to 6, q is an integer of 0, r is an integer of 1 to 12 and s is an integer of 0 to 11, wherein at least one unsaturated carbon-carbon bonding is present in the molecule, and the base oil is polypropylene glycol dimethyl ether.