When axial anti-corrosion fan, motor-driven impeller rotating in a cylindrical housing, gas enters from the current collector, the energy obtained through the impeller, increasing the pressure and speed, and then is discharged in the axial direction. Arrangement of the axial fan has a vertical, horizontal and inclined three, small, only about 100 mm impeller diameter Francis fan specifications, large up to 20 meters. Small low-pressure axial flow impeller corrosion fan, chassis and other components collector, usually mounted on the wall of a building; large high-pressure axial flow fan corrosion by collectors, impeller, flow line body, chassis, diffusion tube and transmission components. Blades are uniformly arranged on the hub, the number is generally 2 to 24. The more blades, the higher the pressure; blade installation angle is generally 10 ° ~ 45 °, the greater Shanghai Francis fan installation angle, the greater the amount of wind and air pressure. Usually work for the state level basement exhaust ventilation and two-speed accident in Shandong Francis fan, two-speed asynchronous motor is particularly suitable. Two-speed fan running at high speed into a low-speed mixed flow fan, synchronous speed improve a lot, the exhaust volume greatly improved accordingly, then the system immediately replaced by exhaust smoke condition. But in the design process, will encounter Electric two-speed fan control problems, that is how to solve the motor windings from Δ connection Y connection to the double conversion and interlocks, fire linkage automatic and manual control; fan In high-speed operation and reliability of the protection shutdown how to maximize the protection accident smoke, how to ensure that the power supply and other issues. Fire Francis fan | Francis fan | Hao Yang Hao Yang air conditioning equipment from the Texas Air Conditioning Equipment Limited. Air Conditioning Equipment Co., Texas Hao Yang (www.dzapjt.com) strong, credible, in Dezhou fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Hao Yang air conditioning and you hand into the brilliant, for a better future!