R134a (1,1,1,2-tetrafluoroethane) is one of the most widely used medium and low temperature environmentally friendly refrigerants. It has good comprehensive performance, making it a very effective and safe R12 (dichloro two Fluoromethane) can be used in most fields where R12 refrigerant is used.

R-134a (1,1,1,2-tetrafluoroethane) is a kind of non-chlorine atom, does not damage the ozone layer, and has good safety performance (non-flammable, non-explosive, non-toxic, non-irritating, non-corrosive) refrigerant, its cooling capacity and efficiency are very close to R-12 (dichlorodifluoromethane, freon), so it is regarded as an excellent long-term alternative refrigerant. R-134a is currently internationally recognized as the best environmentally friendly substitute for R-12. It does not destroy the ozone layer at all. It is an environmentally friendly refrigerant recognized and recommended by most countries in the world. It is also the current mainstream environmentally friendly refrigerant. It is widely used in the initial installation and maintenance of new refrigeration and air-conditioning equipment. [1] . R134a has very low toxicity and is non-flammable in the air. The safety category is A1, which is a very safe refrigerant.