Centrifugal fan [1] is based on the principle of potential energy is converted to kinetic energy, the use of high-speed rotating impeller gas acceleration, then deceleration, change the flow, so that kinetic energy is converted into potential energy (pressure). In the single-stage centrifugal fan, the gas from entering the axial impeller, changing the gas flow through a radial impeller, diffuser and then enter. In the diffuser, the gas flow direction changes caused by deceleration farming fan wet curtain, which slow down the action of kinetic energy into pressure energy. Increased pressure occurs mainly in the impeller fan aquaculture, followed by the process occurs in the diffuser. In a multi-stage centrifugal fan, and reflux into the next impeller allows airflow, resulting in higher pressure. In 1935, the German first axial flow fans for boilers and other pressure ventilation and the wind; in 1948, Denmark made the running variable pitch axial fans; rotating axial fans, Meridian accelerate axial fans, mixed flow fans and cross-flow fan; 2002 farming fans, China's proof FRP centrifugal fan culture fan, in the chemical, petroleum, machinery and other fields widely adopted, Lin Dong-proof centrifugal fan has been developed. Centrifugal fans are commonly used stone processing enterprises auxiliary equipment, mainly for ventilation and dust removal device, such as stone cutting and polishing process cyclone and baghouse etc need to use centrifugal fan for dust removal treatment on production sites to ensure production clean environment, protect the health of producers. Aquaculture wet curtain fan, temperature control equipment Qingzhou Minhua, Binzhou farming fan community is provided by China Qingzhou temperature control equipment plant. Temperature Control Equipment Factory Qingzhou public Hua (www.minhuawenkong.com) is an industry leader in Shandong Weifang, fans, ventilation equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Qingzhou temperature control equipment in China and China leading the staff warmly welcome all inquiries negotiations, China and China Qingzhou temperature control equipment to create a better future.