| 主权项 |
1. A method for filling a refrigerant mixture comprising difluoromethane and 2,3,3,3-tetrafluoropropene, the difluoromethane being present in a liquid phase in an amount of 10 to 90 wt % based on 100 wt % of the total of the difluoromethane and 2,3,3,3-tetrafluoropropene,
the method comprising, in transferring the refrigerant mixture in a liquid state to a target container or equipment from a feeding container, adjusting, immediately before the transfer, the proportion (initial composition) of the difluoromethane in the liquid phase of the refrigerant mixture in the feeding container to x+y1 wt % (minimum value) to x+a wt % (maximum value), so that the proportion of the difluoromethane in the liquid phase of the refrigerant mixture in the feeding container falls within a range of ±a wt % of a target composition (x) of the difluoromethane during initiation and completion of the transfer, wherein ±a is a set tolerance (a≧0); x is a target composition with the proviso that 10≦x≦90, excluding a range satisfying an inequality: y1>a; and y1 is a lower limit of a gap between the target composition and the initial composition, and is represented by Equation (1) below:
1000y1=L1x3+M1x2+N1x+P1 (1), wherein L1=0.0002a+0.016, M1=0.072a+3.4761, N1=7.914a+187.52, and P1=1194.8a−9.58. |
