| 摘要 |
PURPOSE:To provide a working fluid reduced in the affection thereof on the ozone layer of the stratosphere and employed in freezers, heat pumps, etc., by containing difluoromethane, chlorodifuoromethane and chlorotetrafluoroethane in specific amounts, respectively. CONSTITUTION:The objective working fluid contains at least three kinds of freons comprising <=35wt.%, preferably <=25wt.%, of difluoromethane (R32), <=60wt.%, preferably <=50wt.%, of chlorodifluoromethane (R22) and 40-90wt.%, preferably 50-90wt.%, of chlorotetrafluoroethane (R124). |
