| 摘要 |
PURPOSE: To obtain a working fluid having zero of ozone depletion potential and refrigerant characteristics equal to or higher than those of R22. CONSTITUTION: This working fluid comprises <=70wt.% propane (C3 H8 , R290), <=60wt.% cyclopropane (C3 H6 , RC270) and the balance of 1,1,1,2-tetrafluoroethane (CH2 FCF3 , R134a) at componential ratios of the propane to cyclopropane within the range W1 , surrounded by point A (0, 60), point B (10, 60), point C (35, 50), point D (70, 30), point E (70, 20), point F (55, 20) and point G (0, 30) and indicated by solid lines in Figure. The working fluid contains at least the propane and cyclopropane. |
