| 摘要 |
An object of the present invention is to provide a method for filling a refrigerant mixture. This method enables composition changes of a non-azeotropic refrigerant mixture comprising HFO-1234ze(E) and HFC-32 during the transfer to fall within an acceptable range of refrigerant performance. The method for filling a refrigerant mixture comprising HFC-32 and HFO-1234ze(E), the HFC-32 being present in a liquid phase of the refrigerant mixture in an amount of 10 to 90 wt % based on 100 wt % of the total of the HFC-32 and HFO-1234ze(E), comprises, in transferring the refrigerant mixture in a liquid state to a target container or equipment from a feeding container, adjusting the proportion (initial composition) of the HFC-32 in the liquid phase of the refrigerant mixture in the feeding container immediately before the transfer to x+y1 (minimum value) to x % (target upper-limit composition), so that the proportion of the HFC-32 in the liquid phase of the refrigerant mixture in the feeding container falls within a range from the target upper-limit composition (x) of the HFC-32 to the target upper-limit composition (x)-4.0 wt % (target lower-limit composition) during initiation and completion of the transfer. |
| 主权项 |
1. A method for filling a refrigerant mixture comprising difluoromethane and trans-1,3,3,3-tetrafluoropropene, the difluoromethane being present in a liquid phase of the refrigerant mixture in an amount of 10 to 90 wt % based on 100 wt % of the total of the difluoromethane and trans-1,3,3,3-tetrafluoropropene,
the method comprising, in transferring the refrigerant mixture in a liquid state to a target container or equipment from a feeding container, adjusting the proportion (initial composition) of the difluoromethane in the liquid phase of the refrigerant mixture in the feeding container immediately before the transfer to x+y1 (minimum value) to x % (target upper-limit composition), so that the proportion of the difluoromethane in the liquid phase of the refrigerant mixture in the feeding container falls within a range from the target upper-limit composition (x) of the difluoromethane to the target upper-limit composition (x)-4.0 wt % (target lower-limit composition) during initiation and completion of the transfer,a: an amount (wt %) initially filled in the feeding container;x: a target upper-limit composition with the proviso that 10≦x≦90, excluding a range satisfying an inequality: y1>0; andy1: a lower limit of a gap between the target upper-limit composition and the initial composition, y1 being represented by Equation (1) below:
1000y1=L1x3+M1x2+N1x+P1 (1) L1=0.0006 a+0.0033 M1=0.0147 a+1.3904 N1=0.9026 a+112.55 P1=1.1469 a+4464. |
