Abstract: The invention relates to a refrigerant composition and its preparation method, which is characterized by the composition of the following weight percentages: 1,1,1-trifluoroethane: 1-3% Difluoromethane: 8-12% Pentafluoroethane: 40-44% 1,1,1,2-tetrafluoroethane: 42-46% N-butane: 2-4%. Compared with the existing technology, the refrigerant composition provided by the present invention can be used to replace R22 and charged directly into such refrigeration and air conditioning systems as household air conditioner/heat pump unit, unitary air conditioners, refrigeration condensing units, water chillers and other. And the present invention is very close to the physical parameters of R22, compatible with the lubricating oil, conduits and components of the existing R22 system and can also be directly charged to replace R22 with a low cost and good refrigeration efficiency and cooling effect. Moreover, this invention will not deplete the stratospheric ozone layer while having a simple preparation method.

Abstract: The invention relates to a refrigerant composition and its preparation method, which is characterized by the composition of the following weight percentages: 1,1,1-trifluoroethane: ?1-3% Difluoromethane: ?8-12% Pentafluoroethane: 40-44% 1,1,1,2-tetrafluoroethane: 42-46% N-butane: ??2-4%. Compared with the existing technology, the refrigerant composition provided by the present invention can be used to replace R22 and charged directly into such refrigeration and air conditioning systems as household air conditioner/heat pump unit, unitary air conditioners, refrigeration condensing units, water chillers and other. And the present invention is very close to the physical parameters of R22, compatible with the lubricating oil, conduits and components of the existing R22 system and can also be directly charged to replace R22 with a low cost and good refrigeration efficiency and cooling effect.