DuPont refrigerant freon R22 R-22 as of today's most widely used in low-temperature refrigerant, mainly used in home air conditioning, commercial air conditioners, central air conditioning, mobile air conditioning, heat pump water heaters, dehumidifiers, refrigerated dryers, cold storage, frozen food equipment, marine refrigeration equipment, industrial refrigeration, commercial refrigeration, refrigeration condensing units, supermarket display display cabinets and other refrigeration equipment. Chlorodifluoromethane polytetrafluoroethylene resin may also be used in the production of raw materials and intermediates 1121 fire extinguishing agent, and a polymer (plastic) a physical blowing agent. For reciprocating compressors for industrial, commercial, home air conditioning system refrigerant; granules can be used for killing and aerosol spray propellants, can also be used to produce extinguishing agent 1211; is the production of fluorine-containing polymer compound The basic raw materials.