Dwell on the categories of freon refrigerant1

freon refrigerant of the scientific name is halocarbon refrigerants, also known as the kind of refrigerant, halocarbon compounds is the floorboard of the halogen derivative of saturated hydrocarbons, as in the 30 s of this century with the development of chemical industry and the type of refrigerant, it solved the refrigeration KongDiaoJie seeking of refrigerants. Can be seen from the definition of freon, now what is called the non freon R134a has a, r410a and R407C are freon.

? 吗? The freon refrigerants used in refrigeration and air conditioning industry with R11, R12, R22, R32, R113? , R115, R123, R125, everything, R143a, R141b, R142b, R152, r404a ( 44% R143a R125 and 52% and 4% of the 134 a) , R407C( And 25% of the 23% of R32 R125 and 52% of everything) 、R410a( And 50% of the 50% of R32 R125) 、R500( 73. 8% of the R12 and 26. 2% of R152) 、R502( 48. 8% of R22 and 51. 2% of R115) And so on.

? 吗? Freon could damage the ozone layer is because there is the existence of Cl element in refrigerants, and with the increase of the Cl original number, to the ozone depletion ability increase, with the increase of H element content of ozone depletion ability; The greenhouse effect is mainly due to the refrigerant in the process of slow oxidation decomposition, generate large amounts of greenhouse gases, such as CO2, etc. According to the points of freon refrigerant structure, which can be roughly divided into the following three categories:

? 吗? The first is the CFC categories: mainly including the R11, R12, R113? , R115, R500, R114, due to the destruction of the ozone layer is very big, has been the Montreal protocol as a kind of controlled substances. Such material is currently bans the use, in the process of manufacture of ammonia and cool sponge, R11 by R141b as transitional substitutes.

? 吗? The second category is hydrogen CFCS: mainly including R22, R123, R141b and R142b, ozone depletion coefficient is only a few percent of R11, therefore, at present the second substance is regarded as the first kind of very important transitional alternative material. R22 were limited in the Montreal protocol in 2020, R123 are limited in 2030, developing countries can postpone for 10 years.

? 吗? The third kind is hydrogen fluoride hydrocarbon: mainly includes everything, R12, lt32, R407C, R410a, R152, ozone depletion coefficient is 0, but warming ozeme depletion potential is very high. In the Montreal protocol has not stipulated the use period, in the United Nations framework convention on climate change as a greenhouse gas in the Kyoto protocol.

? 吗? At present all almost all refrigerants are used by fluorine aung products outside the chuhe ammonia long non freon refrigerant so far has not yet been developed. Before the new refrigerant developed, our country to solve the air conditioning unit to choose what kind of refrigerant, the environment of our country rely on the damage is relatively small. Is banned in China should first class products, rather than the second and the third type of refrigerants.

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