How many types of refrigerants are there?

Refrigerants are generally defined as the general term for halogenated substances of saturated hydrocarbons (mainly methane, ethane and propane) in China. According to this definition, they can be divided into three categories: CFC, HCFC, and HFC. The types of refrigerants we use in the refrigeration industry are: r11, r12, r113, r114, r115, R123, R125, R134a, R141b, R142b, R143a, R152a, R218, R22, R236fa, R227ea, R23, R32, R41, R290 , R600, r600a, R1270, hexafluoropropylene, r404a (44% of r125 and 52% of r143a and 4% of 134a), R405A, R406A, R407A, R407B, r407C (23% of r32 and 25% of r125 and 52 % R134a), R407D, R407E, R408A, R409A, r410a (50% r32 and 50% r125), R410B, R415B, R416A, R418A, r500 (73.8% r12 and 26.2% r152), r502 (48.8 % R22 and 51.2% r115) R503, R507A, R508A, R508B, R509A, etc. 1. Chlorofluorocarbons: abbreviated as CFC, among the top ten global environmental problems, the depletion of the ozone layer ranks first, followed by the greenhouse effect and global warming. The destruction of the ozone layer has led to an increase in ultraviolet radiation, exacerbating the epidemic of infectious diseases and skin cancer. The increase in greenhouse gases leads to global warming and rising sea levels. Man-made chemicals Chlorofluorocarbons (CFCs) play an important role in both processes. Mainly including r11, r12, r113, r114, r115, r500, r502, etc., due to its most destructive effect on the ozone layer, it is listed as a class of controlled substances by the Montreal Protocol. The use of such substances is currently banned. In the process of making polyurethane sponges, r11 has been replaced by r141b as a transitional substitute. 2. Hydrochlorofluorocarbon: abbreviated as hcfc, mainly including r22, r123, r141b, r142b, etc. The ozone layer destruction coefficient is only a few percent of r11. Therefore, currently hcfc substances are regarded as the most important transition of cfc substances Sexual substitutes. In the Montreal Protocol, r22 is limited to 2020 and r123 is limited to 2030. Developing countries can postpone it for 10 years. 3. Hydrofluorocarbons: abbreviated as hfc, mainly including r134a, r125, r32, r407c, r410a, r152, etc. The ozone layer destruction coefficient is 0, but the climate warming potential is very high. In the 'Montreal Protocol

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