The present invention provides a refrigerating machine oil comprising at least one oxygen-containing oil having a carbon/oxygen molar ratio of 2.5 or more and 5.8 or less as a base oil, and the refrigerating machine oil being used with a trifluoroethylene refrigerant
본 발명은 탄소/산소 몰비가 2.5 이상 5.8 이하인 함산소유의 적어도 1종을 기유로서 함유하고, 트리플루오로에틸렌 냉매와 함께 사용되는 냉동기유를 제공한다. 