| 摘要 |
PROBLEM TO BE SOLVED: To provide a mixed working fluid which exerts no influence on the stratospheric ozonosphere and little influence on global warming, has excellent stability, and does not ignite and explode even if it leaks into an apparatus having a source of ignition and to provide a refrigerating equipment using the same. SOLUTION: This fluid comprises a refrigerant comprising 0.5 to below 25 wt.% trifluoroiodomethane and above 75 to 99.5 wt.% isobutane (the total is 100 wt.%) and a refrigerator oil for use in a refrigeration cycle, being a lubricating oil selected from among a naphthene oil, a paraffin oil, an alkylbenzene oil, and a mixture of at least two of them and containing an epoxy stabilizer as an essential component.
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