| 摘要 |
PURPOSE:To provide a working fluid reduced in the affection thereof on the ozone layer of the stratosphere and capable of being employed as a substitute of dichlorodifluoromethane (R12) by containing difluoromethane, chlorodifluoromethane and chlorodifluoroethane in a specific ratio. CONSTITUTION:The objective working fluid contains at least three kinds of freons comprising (A) <=45wt.% (preferably <=35wt.%) of difluoromethane (R32), (B) <=75wt.% (preferably <=65wt.%) of chlorodifluoromethane (R22) and (C) 25-85wt.% (preferably 35-85wt.%) of 1-chloro-1,1-difluoroethane (R142b). The working fluid is employed in freezers, heat pumps, etc. |
