In the global market, frequency conversion air-conditioning is still one of the most popular fashion products. Japan, as a powerful nation in frequency conversion air-conditioning, from the early 1980s to the present, the frequency air-conditioning is accounts for 90 percent of the total market. Although frequency conversion air-conditioning consumption in China not yet becomes mainstream, it is developing rapidly. According to the China Social Survey Office in Beijing, Shanghai, Guangzhou, Chongqing, Wuhan and other cities five major consumer survey conducted by air-conditioning, 77.5 percent of urban inhabitants will purchase frequency air-conditioning in the future.

Compared with the general air-conditioning, high technology of the frequency conversion air-conditioning have some advantages of smart air-conditioning running, energy-saving power-saving and so on, thus welcomed by many consumers, and its popularity, will also be a certain extent to improve people's quality of life.

It is understood that from 1996, the core technology of the frequency of air-conditioning - fuzzy control microcomputer technology in research, it is the earliest enterprise engage in air-conditioning frequency technology research and development. In 1997, Chunlan master the frequency of fuzzy control technology successfully, independent development of frequency fuzzy controller, and also have a comprehensive upgrading and transformation of the original imported inverter module "one drag one" wall air-conditioning program-controlled electrical. It became a master that only in control of the core technology of the frequency conversion air-conditioning in the Chinese air-conditioning manufacturing enterprises. Later Chunlan have also developed the frequency of "one drag two", "one drag three" and drag counter machine, tuogua machine, and other products, so that the Chunlan frequency air-conditioning products "one drag more" to the series. Seven years ago, Chunlan based on the analysis and design of the computer simulation, using 3D, CT, and other advanced industrial research, developed the representative of today’s highest technology of Chunlan new generation of digital DC inverter air conditioning, and guide the development of the domestic inverter air conditioning into a new trend.

Chunlan frequency air-conditioning adopt the most advanced DSP digital signal processing and space vector control technology, it has a super human sensing that according to the number of interior people to automatic adjust the frequency inverter compressor, the compressor is in the best moment of power output, let the ever-changing environment of the space always comfortable. When in the empty room, it will automatically stop after 15 minutes. And then maintain the same circumstances of the cool and heat; the compressor will always be with a minimum current operation to maximize energy efficient. After the test, in the same power, the frequency of Chunlan air-conditioning save 20 percent -30percent energy compared with ordinary ones.

At present, Chunlan frequency air-conditioning technology and quality is still the leader of those similar products in the domestic market. Its top and new products not only become the first choice of the fashion consumer, but also become the important China's export household electrical appliances to Europe and the United States. (Kuangmin)