Abstract:
PURPOSE: A refrigerant mixture containing difluoromethane, pentafluoroethane, 1,1,1-trifluoroethane is provided to substitute HCFC-22(chlorodifluoromethane, CHClF2) without worry of use restraint as being no risk of ozone layer destruction. CONSTITUTION: The refrigerant mixture comprises difluoromethane(CH2F2, HFC-32) as first component; pentafluoroethane(CHF2CF3, HFC-125) as second component; 1,1,1-trifluoro ethane(CH3CF3, HFC-143a) as third component; one component selected from cyclopropane(C3H6, RC-270), 1,1,1,2,3,3,3-heptafluoropropane(CF3CHFCF3, HFC-227ea), 1,1,1,2,2-pentafluoropropane(CH3CF2CF3, HFC-245cb), isobutane(CH(CH3)2CH3, R-600a), octafluorocyclobutane(C4F8, RC-318), 1,1,1,2,3,3-hexafluoropropane(CHF2CHFCF3, HFC- 236ea), butane(C4H10, R-600), bis(difluoromethyl)ether(CHF2OCHF2, HFE-134), penta fluoroethylmethylether(CF3CF2OCH3, HFE-245).