Recently, chunlan, listed company chun refrigeration equipment co., LTD. (hereinafter referred to as: chunlan (600854, shares) shares) and the state environmental protection department, China household electrical appliances association three parties signed the room air conditioner manufacturing process using propane to replace R22 technical transformation project contract \"(hereinafter referred to as:\" the contract \"). According to the requirements of the \"contract\", the company will transform a annual output of nearly ten thousand sets of R290 air-conditioning production line. According to the countries signed the Montreal protocol in 1987, 2013 global HCFCs (CFCS) contains hydrogen consumption will freeze in an all-round way, at the same time, associated with HCFCs material in product manufacturing and implementation. HCFCs class material is refrigerant R22 (freon) refrigeration industry the main material, it has a great damage to the atmospheric ozone layer. According to the Montreal protocol and the China room R22 air conditioner industry material selection management plan \", to find and use alternative efficient, environmentally friendly refrigerant R22, become especially air conditioning refrigeration industry industrial chain each production enterprise inevitable option. Chun in the late 1990 s began to research environmental protection air conditioning, try to application of cfc-free refrigerants in air conditioning. At the beginning of this century, chunlan, as the industry leader of the unit of energy conservation and environmental protection air conditioning research and development, led by the national key technical innovation project \"development and application of energy conservation and environmental protection air conditioning technology\", and produce for R407C, R410a refrigerant cfc-free, environmental protection air conditioning. In recent years, in depth study of the refrigerant substitutes, and master advanced technology on the basis of environmental protection, chunlan, launched than everything non-fresno of more environmentally friendly refrigerant R407C, R410a air-conditioning products. Now, chun is trial-produce R290 as new environmental protection air conditioning refrigerants, and strive to the product by the end of first to enter the domestic market. R290 Chinese name called propane, belongs to the hydrocarbon refrigerants no destruction to ozone layer, and the greenhouse effect also is very small, it is the most environmental protection refrigerants. As a kind of natural hydrocarbon working medium, the critical pressure is low, it has a high latent heat of evaporation and good environmental protection and thermal performance, at the same time, in under the premise of work will not affect the compressor into the air, can effectively reduce the compression ratio, improve the working efficiency of the compressor and enhancing overall system efficiency. To ensure the air conditioning of R290 as refrigerant production line technological transformation project is completed, and steadily improving its key parts and product test and production capacity, chunlan co has set up a general manager for leader of R290 production line technological transformation project implementation team, plan through months of hard work, high efficiency, high quality complete technological transformation projects, to fully implement the provisions of the \"contract\". (article source: newspaper wen wei Po)