REFRIGERANT MIXTURE COMPRISING DIFLUOROMETHANE AND 1,1,1-TRIFLUOROETHANE

摘要

PURPOSE: A refrigerant composition is provided which shows the similar performance to HCFC-22 that is currently used by additionally mixing one constituent from RC-270, HFC-227ea, HFC-245cb, HFC-236ea, R-600, HFE-134 or HFE-245 to a mixture of HFC-32 and HFC-143a. CONSTITUTION: In a composition of a refrigerant mixture which can be used instead of HCFC-22, the refrigerant mixture comprises 20 to 70 wt.% of difluoromethane (CH3F2, HFC-32) as a first constituent, 10 to 70 wt.% of 1,1,1-trifluoroethane (CH3CF3, CFC-143a) as a second constituent, and 45 wt.% or less of cyclopropane (C3H6, RC-270) or butane (C4H10, R-600) as a third constituent, wherein each of the HFC-32, HFC-143a and RC-270 comprise 20 to 40 wt.%, 30 to 70 wt.% and 30 wt.% or less respectively, and wherein each of the HFC-32, HFC-143a and R-600 comprise 30 to 50 wt.%, 38 to 70 wt.% and 12 wt.% or less respectively.