Air conditioning unit at the time the choice of refrigerant is to take into account the local environment, Diqing air conditioning units, in addition to the environment outside, we are to the refrigerant applicability of certain requirements. Specific requirements are as follows: 1, at a certain evaporation temperature, evaporation pressure is higher than atmospheric pressure, the air conditioning unit principle, in order to avoid the impression of air into the clean air conditioning units cooling effect and life of equipment, in addition, a vapor pressure above atmospheric pressure, the system is easy to find in the event of a leak performance; 1 cabinet panel for the double wall structure, the inner layer of galvanized steel, the outer color composite steel plate, the middle with 30-50mm thick CFC-free polyurethane foam as insulation material , thermal conductivity, waterproof insulation good effect. At the same time the effect of the design of the interior wall reinforcement structure, the unit stronger and more durable. 2, between the aluminum panels and the frame is made of insulating protection, air conditioning units brand, security eliminates cold bridges, small leakage rate, good sealing. 3, the overall structure is novel and unique, rigidity, light weight, easy disassembly. _ Chenyu air conditioning unit installed air conditioning (certified) _ Diqing air conditioning units are provided by Wu Cheng Chen-yu air-conditioning Limited. Wu Cheng Chen-yu air-conditioning Co. (www.wccykt.com) is an industry leader in Shandong Dezhou, fans, ventilation equipment, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . Chen Yu-conditioned in leadership with the staff warmly welcome all inquiries negotiations to create Chenyu air conditioning better future.