A smaller than 200 grams of small electronic expansion valve, add up to nearly 3,000 domestic and foreign patents. Shield cold into the high-end refrigeration components market where the breakthrough? Shield security environment electronic expansion valve development team after nine years of unremitting exploration, gives a wonderful answer. With more than 2,000 intellectual property protection barriers set up by foreign competitors, all team members, after continuous tracking research, studying thousands of patent documents at home and abroad, reading countless professional materials and countless technological breakthroughs, finally came to an end Break domestic and foreign patented technical barriers to design a new generation of electronic expansion valve products with independent intellectual property rights. The product company has applied for 22 national patents, of which 6 patents for inventions. Shield An environmental development team with a firm confidence and painstaking efforts to establish a Shield in the electronic expansion valve independent intellectual property system for the shield of the second generation of products with cold laid the foundation for the successful layout and opened up the security environment shield with cold The new world of career development. This year, the DunAn Environment participated in "2011 American Refrigeration Show" sponsored by the American Association of Heating, Air Conditioning and Refrigeration (ASHRAE) and the American Society for Air Conditioning and Refrigeration (ARI), introduced the electronic (thermal) expansion valve developed in the past year or two, Sensors and other second and third generation of new products, causing concern in the industry.