| 摘要 |
PURPOSE:To provide a working fluid having only small effects on the stratospheric ozone layer, alternative to dichlorodifluoromethane (R12), comprising chlorodifluoromethane, a difluorethane and a dichlorotrifluorethane at specific proportion. CONSTITUTION:The objective working fluid comprising (A) 5-90 (pref. 40-85)wt.% of chlorodifluoromethane, (R22) (B) <=95 (pref. <=55)wt.% of 1,1-difluoroethane (R152a), and (C) <=55 (pref. 5-50)wt.% of 2,2-dichloro-1,1,1-trifluorethane (R123). The working fluid is used in refrigerating machines, heat pumps, etc. |
