Is there a difference between R22 and the fluorocarbons whose use is restricted?

R22, Freon 22, chlorodifluoromethane – its molecular formula is CHClF2, with a molecular weight of 86.47. At room temperature, R-22 is a colorless gas with almost no taste. It belongs to the Freon family and is classified as a hydrochlorofluorocarbon. The definition of Freon: Freon is a general term for halogenated derivatives of saturated hydrocarbons (hydrocarbons). It is a type of refrigerant that emerged in the 1930s with the development of the chemical industry, and its advent solved the need for refrigerants in the field of refrigeration and air conditioning. From the definition of Freon, it can be seen that substances such as R134a, R410A, and R407C, which are referred to today as non-Freon compounds, are actually all types of Freon. Freon is able to damage the ozone layer due to the presence of CL elements in the refrigerant; as the number of CL atoms increases, the ability to damage the ozone layer increases, while an increase in the amount of H elements reduces this destructive effect ； The greenhouse effect is mainly caused by the large amount of greenhouse gases, such as CO2, that are produced during the slow oxidation and decomposition of refrigerants. Based on the molecular structure of Freon refrigerants, they can be roughly divided into the following 3 categories: 1. Chlorofluorocarbons: abbreviated as CFCs, mainly including R11, R12, R113, R114, R115, R500, R502, etc. Due to their significant destructive effect on the ozone layer, they are listed as controlled substances under the Montreal Protocol. The use of such substances is now prohibited; in the production of polyurethane foam, R11 has been replaced by R141b as a transitional alternative. 2. Hydrochlorofluorocarbons: abbreviated as HCFCs, they mainly include R22, R123, R141b, R142b, etc. Their ozone-depletion potential is only a few percent of that of R11; therefore, HCFCs are currently regarded as the most important transitional alternatives to CFCs. Under the Montreal Protocol, R22 is required to be phased out by 2020, while R123 has a deadline of 2030; developing countries **can delay this by 10 years. 3. Hydrofluorocarbons: abbreviated as HFCs, they mainly include R134a, R125, R32, R407C, R410A, R152, etc. Their ozone-depletion potential is 0, but their global warming potential is very high. The Montreal Protocol does not specify a deadline for its use, and it is classified as a greenhouse gas under the Kyoto Protocol to the United Nations Framework Convention on Climate Change. All the refrigerants we use at present are fluorine-based products; non-fluorine refrigerants have not yet been developed. Until new refrigerants are developed, what we need to determine is which type of refrigerant should be used in air conditioning units, one that causes relatively less damage to the environment on which we depend for survival. It is Category 1 refrigerants that we should explicitly ban, not Categories 2 and 3. From Baidu, hehe

The repost upstairs clarified the incorrect notions that had been in my mind for a long time; thank you!

We use R22 in our refrigeration units

Those who say R22 is a refrigerant that can replace Freon are really good at lying; they’re on par with President Hou. Although ammonia has many disadvantages as a refrigerant, from an environmental perspective, our factory still chose ammonia for its refrigeration units. At the time, the refrigeration equipment manufacturers recommended that we use R134a, but after doing some research, we found that R143a is a greenhouse gas, so we did not opt for it either.

:)Thank you, Floor 2; I’ve learned a bit more