Refrigerating machine oil and refrigerator using same

摘要

The present invention provides a refrigerating machine oil which permits ready removal of sludge generated in a refrigerant circuit and is easy to return to a compressor, and a refrigerator using the oil. A refrigerating machine oil composed of a mixture of alkylbenzene based oil and ether based oil is used in a refrigerant circuit whereby the ether based oil well soluble in a HFC based refrigerant maintains a lubricating performance of a compressor (1) and the alkylbenzene based oil peels off and removes sludge generated on an inner surface of a small diameter portion of a capillary tube (4) to prevent clogging of the capillary tube.