Industrial fan electric ventilation shutters

A kind of industrial fan electric ventilation shutters, including: window frame, window frame set among the column, the column formed on the surface of set transmission components, stele appearance face guidance setting lever, multiple blade, its sides respectively the first and second pin joint hole, window frame and column corresponding blade assembly has place the first pin joint shaft and the first pin joint KongShu joint, drive rod corresponding to each piece is installed in the position with the second pin joint shaft and the second pin joint KongShu joint, transmission components through the eccentric stem drive the lever to move up and down, drive stem drive each piece is the second pin joint hole in the first pin joint hole for shaft rotary pendulum, in order to achieve the blade open or closed purpose, and the blade open or closed in the process of the rotation Angle through the circuit board to control, thus the operation more accurate and save two detector switch Settings maintenance costs.