R-134a as the most widely used in low-temperature environmental refrigerant HFC-134a due to the good overall performance, making it a very effective and safe alternatives to CFC-12, mainly used in the majority of the use of R12 refrigerant areas, including: refrigerators, freezers, water dispensers, car air conditioners, central air conditioners, dehumidifiers, cold storage, commercial refrigeration, ice machines, ice machines, refrigeration condensing units and other refrigeration equipment, but can also be applied to aerosol propellants, medical aerosols, insecticide propellants, polymers (plastics) physical blowing agents, and magnesium alloy to protect gases. R134a R-134a is internationally recognized as CFC-12 best environmental alternative. HFC-134a does not contain chlorine atom, can not afford the destructive effects on the ozone layer, has a good safety performance (non-flammable, non-explosive, non-toxic, non-irritating, non-corrosive); its cooling capacity and efficiency with CFC-12 is very close So long considered excellent alternative refrigerants. HFC-134a can be widely used as car air conditioners, refrigerators, central air conditioning, commercial refrigeration and other industries refrigerants can be used *, pesticides, cosmetics and cleaning industries.