The history of the multi-blade centrifugal fan blower has a long history. BC for many years had produced a simple wooden Husker windmill, its role is basically the same principle with modern centrifugal fan. In 1862, Britain's Kyu Bell invented the centrifugal fan impeller, chassis concentric type chassis with a brick, wooden straight blade impeller backward, efficiency is only about 40%, mainly for mine ventilation. 1880 people used for the mine platoon blowing snail chassis design, and after the curved blade centrifugal fan, the structure has a relatively complete. France in 1892 for the development of cross-flow fan; Irish Xiluo Ke-forward blade centrifugal fan design in 1898, and is widely used by countries; axial fan has been applied to the blast of the mine ventilation and metallurgical industry in the 19th century, pressure of only 100 to 300 Pa, only 15 to 25% efficiency, faster development until the 1940s. In 1935, Germany First Axial pressure fan boiler ventilation and cited wind; 1948, Denmark made the operation of variable pitch axial fans; Rotating Axial Fan, meridian accelerated axial fans, mixed flow fan and cross flow fan; explosion-proof centrifugal fan in China in 2002, the chemical industry, petroleum, machinery and other fields has been widely adopted. Foshan Sanhe Environmental Ventilation Equipment Co., Ltd. was founded in 2000, is a professional manufacturer of FRP corrosion resistant fan, plastic fan, FRP, PP mist purification tower the green ventilation equipment company; company formerly known as Guangzhou Sanhe Environmental ventilation equipment company to meet the needs of the business development, the company in 2009 from Guangzhou Panyu relocation to the Sanshui District, Foshan City, Datang Industrial Park, and renamed as Foshan Sanhe Environmental Ventilation Equipment Co., Ltd.. Foshan Sanhe Environmental Ventilation Equipment Co., Ltd. Tel :0757 -87,270,024 Mobile: 13318880325 Contact: Mr. Li Zaixiong Website: http://www.zgfengji.com/ Address: Foshan Sanshui District Datangpo Center Technology Park Hublot Road