Patent ID: 6569347
Filing Date: 2003-05-27
Classification: C10M,C10N,F04C,F25B

Abstract:
A mixture consisting of a hydrofluorocarbon refrigerant and a refrigerating machine oil obtained by mixing a first synthetic oil comprised of an alkylbenzene oil and a second synthetic oil other than alkylbenzene oil, wherein a refrigerant rich layer has an oil concentration of 2.5 or more percent by weight when the refrigerating machine oil and the hydrofluorocarbon refrigerant are separated into two layers at a temperature of 0Â° C., wherein a ratio of the alkylbenzene oil relative to the refrigerating machine oil is 5 to 50 percent by weight, and wherein the second synthetic oil is selected from the group consisting of an ether oil, a fluorine oil, and a carbonate oil.