| abstract |
The present invention provides, in one aspect, a refrigerator oil containing a lubricant base oil and a compound represented by the following formula (A), and used together with a refrigerant containing unsaturated fluorinated hydrocarbon. [Chemical formula 1] [Wherein, R 1 and R 2 each independently represent a monovalent hydrocarbon group, and R 3 and R 4 each independently represent a hydrogen atom or an alkyl group. ] |