| abstract |
A refrigerant applied to automobile air conditioners for replacing HFC-134a. The refrigerant comprises 2,3,3,3-tetrafluoropropene (HFO-1234yf) and 1,1-difluoroethane (HFC-152a), or can further comprise isobutane (HC-600a). The preparation method of the refrigerant comprises physically mixing the above components according to the corresponding mixture ratio under liquid phase. The refrigerant has equivalent physical properties to those of HFC-134a, is compatible with pipelines and components of the prior systems for HFC-134a, has safe use, higher refrigeration efficiency and quite low temperature glide, is free from damaging atmospheric ozone layer and has quite low GPW value and reduces replacement fee. The refrigerant can be used as a replaced refrigerant of HFC-134a in automobile air conditioners. |