| 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 chlorodifluoromethane, difluoroethane and tetrafluoroethane in a specific ratio. CONSTITUTION:The objective working fluid contains at least three kinds of freons comprising (A) 5-45wt.% (preferably 30-35wt.%) of chlorodifluoromethane (R22), (B) <=95wt.% (preferably <=15wt.%) of 1,1-difluoroethane (R152a) and (C) <=75wt.% (preferably 55-70wt.%) of 1,1,2,2-tetrafluoroethane (R134). The working fluid is employed in freezers, heat pumps, etc. |
