| 摘要 |
PURPOSE:To obtain a working fluid, containing specific amounts of trifluoroethane, chlorodifluoromethane and chlorotetrafluoroethane, hardly affect ing the stratospheric ozonosphere and used for refrigerators, heat pumps, etc. CONSTITUTION:The objective working fluid containing at least three kinds of fluorocarbons of <=55wt.%, preferably <=40wt.% trifluoroethane (R143a), <=60wt.%, preferably <=50wt.% chlorodifluoromethane (R22) and 40-80wt.%, preferably 50-80wt.% chlorotetrafluoroethane (R124). |
