Common six types of refrigerant naming method_industry standard

The naming method of common six types of refrigerants 　　(1) Inorganic compound 　　The abbreviation of inorganic compound is defined as R7(). The brackets represent a set of numbers, which are the integer part of the molecular weight of the inorganic substance. (2) The molecular formula of halogenated hydrocarbons and alkanes is CmH2m+2; the molecular formula of halogenated hydrocarbons is CmHnFxClyBrz(2m+2 u003d n+x+y+z), and their abbreviations are specified as R(m-1)(n+1)(x)B(z). The following figure shows some examples of symbols for refrigerants '(3) Non-azeotropic mixed refrigerants' The abbreviated symbol of non-azeotropic mixed refrigerants is R4(). The brackets represent a set of numbers, which are the serial numbers of the refrigerant named, starting from 00. The abbreviation for '(4) azeotropic mixed refrigerant' is R5(). The brackets represent a set of numbers, which are the serial numbers of the refrigerant named, starting from 00. '(5) Cycloalkanes, alkenes and their halogenated substances' 'The writing symbol stipulates: the halogenated substances of cycloalkanes and cycloalkanes start with the letter RC, and the halogenated substances of alkene and alkene start with the letter R1.　　(6) Organic refrigerants are numbered arbitrarily in the 600 sequence.

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