About the development of air conditioning refrigerant brief history

Refrigerant is in the central air conditioning complete refrigeration cycle working fluid in refrigeration system. For heat pump system, the refrigerant can also be called a heat pump working medium. Have the appropriate pressure and temperature, and to meet certain conditions can be used as a refrigerant material about dozens of, but the commonly used but a dozen, can be divided into the derivatives of saturated hydrocarbons, cyclic organic compounds, azeotrope, saturated hydrocarbons, organic oxide, inorganic compound and so on. The development of the refrigerant can be divided into three stages: stage (* * In 1830 ~ 1930) , the main use of refrigerants for ammonia ( NH3) And sulfur dioxide ( SO2) , carbon dioxide ( CO2) , air and water, etc. , are mostly natural working substance, has certain toxic and combustible; * * ( In 1930 ~ 1990) , the main use of refrigerants for CFCs CFCs ( Chlorofluoro - arbon) And hydrogen CFCS HCFCS ( 氢围chlorofluocarbon) ; The third stage ( 1990 - present) , the main use of refrigerants for HFC HFCs ( Hydrofluorocarbon) And natural working substance.

refrigerant gas are among the best and the long known , which plays an essential part in automatic manufacturing.

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