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 farmed fan diffuser, the gas flow direction changes caused by deceleration, the deceleration effect converting kinetic energy into pressure energy. Pressure increased mainly in impeller, diffuser second place in the process. In a multi-stage centrifugal fan, the reflux allows airflow into the next breeding impeller fan wholesale produce higher pressures. The main consequence of this reflux export performance generated as follows: First, the exit area can not take full advantage of farming fan sales price, the actual amount of wind often can not meet the design requirements. Second, the destruction of breeding fan blowing uniformity specifications, affecting the heat transfer performance of the evaporator. Third, the return air collision speed of rotation of the impeller, resulting in aerodynamic noise. Thus, this phenomenon should be avoided. Farming fan specifications, Qingzhou Minhua temperature control equipment, Fuyang farming fan community is provided by China Qingzhou temperature control equipment plant. Temperature Control Equipment Factory Qingzhou public Hua (www.minhuawenkong.com) (www.minhuawenkong.com) (www.minhuawenkong.com123) is an industry leader in Shandong Weifang, fans, ventilation equipment, over the years, the company is implementing the scientific management, innovation 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. You can also access (www.minhuawenkong.com/supply_details_43839520.html), for more information about the company.