| 摘要 |
PURPOSE:To provide a working fluid which hardly affects the ozone layer in the stratosphere and can substitute for R22. CONSTITUTION:A working fluid comprising 0 to about 55wt.%, pref. 0 to about 45-wt.%, trifluoromethane (CHF3), 0 to about 85wt.%, pref. 0 to about 80wt.%, trifluoroethane (C2H3F3), and about 15 to about 90wt.%, pref. about 20 to about 85wt.%, chlorotetrafluoroethane (C2HClF4). |
