LAF type clean laminar flow hood is used in precision electronic device operation rooms and pharmaceutical workshops for safe washing, drying and filling and sealing lines, antibiotic bottle washing, drying and filling and sealing lines, oral liquid bottle washing, drying and filling and sealing lines, clean air supply processing on large infusion production lines, etc. widely used in the environment. The fan adopts high-quality centrifugal fan, which has the characteristics of long life, low noise, maintenance-free, small vibration, and stepless speed adjustment. The fan quality is reliable and the working life is as long as 100,000 hours or more.