| 摘要 |
PURPOSE:To provide a working fluid reduced in the affection thereof on the ozone layer of the stratosphere and employed as a substitute of dichlorodifluoromethane (R12) by containing trifluoromethane, chlorodifluoromethane and tetrafluoroethane in a specific ratio. CONSTITUTION:The objective working fluid contains at least three kinds of freons comprising (A) <=25wt.% (preferably <=15wt.%) of trifluoromethane (R23), (B) <=45wt.% (preferably <=35wt.%) of chlorodifluoromethane (R22) and (C) 55-95wt.% (preferably 65-95wt.%) of 1,1,2,2-tetrafluoroethane (R134). The working fluid is employed in freezers, heat pumps, etc. |
