R22 is our country at present are the largest and the most widely application scope of the refrigerant. In July 2011, China submitted by polyurethane foam, polystyrene foam extrusion (X), the room air conditioner, industrial and commercial refrigeration, cooling, maintenance industry in the first stage HCFCs are out of the plan in the Montreal protocol for the 64th time through multilateral fund board, and get a $265 million project. Industrial and commercial refrigeration industry has spearheaded hydrogen elimination refrigerant CFCS (HCFCs). On December 12, 2012, four companies such as gree, shield security environment, raised $18.05 million in funding, will have on the modification of refrigeration and air conditioning equipment production line 10, promised to eliminate 3064 tons of refrigerant hcfc-22 (also called R22). Experts point out that refrigerant replacement is a worldwide problem, the main using R290 replacement of household air conditioning, commercial, industrial, mostly choose R32, a small number of using R410A, CO2 and NH3. \"There is no perfect alternative refrigerants, choose the relatively better now.\" China refrigeration and air conditioning industry association technical personnel explain, R290 have flammability, R32 have flammability, R134A has a relatively mature alternative technology and higher GWP index of R410A. We have learned, in R22 alternative directions, China household electrical appliances association first hydrocarbon substance as refrigerant R22 alternative technologies, and R410A as transitional alternative technologies. Actually, midea, gree, haier, chigo, TCL and other enterprise is devoted to the study of the environmental protection refrigerant. In July 2011, the United States about R32, R290 and R161 three new environmental protection refrigerant technology and application of key technology research project formally approved identification. Gree the same month, the world\'s first demonstration of R290 fission air conditioning production line of formal completion, acceptance by sino-germany joint panel between the two countries. In August 2012, won the global environmental protection refrigerant air conditioning gree R32 first VDE certification. Remarkably, the using new environmental protection refrigerant air conditioning products face the embarrassment of not listed R290 air conditioning is so. Product need to pass 3 c certification, but not yet implemented such products safety standards, no certification basis. \"It involves the standard question, is that all the enterprises need to solve. Second, is the issue of security protection, air conditioning is a semi-finished products leaving the factory, installation link to eliminate risk factors.\" The Chinese electrical appliances research institute electrical division engineer Hu Zhijiang analysis, R290 because of its flammability, support safety standards need to do a lot of experiments, the current product standards is limited to the lowest concentrations of combustible. According to the requirements of the existing security and R290 and R600 flammable refrigerants are not allowed for the related categories. Standards at present, the refrigerant has \"household and similar electrical appliances safety special requirement of heat pump, air conditioner and dehumidifier (GB4706.32-2004), the cooling and heating with mechanical refrigeration system safety requirements\" (GB9237-2001) and refrigerant number method, and security classification (GB/T7778-2008). Government departments are to make some measures to make up for the blank place. Some certification experiment reform is in progress. The GB4706.32-2004 revision of the new standard will come into effect on May 1,, the new join flammable refrigerants in identification, transportation, installation, storage, filling the safety of the operation and use, increase of flammable refrigerants appliance installation and maintenance requirements. (source: China refrigeration network)