The work principle of the ventilation fans

Ventilation fans consist of discharge, inhaled, and hybrid three kinds. Discharge type from natural inlet into the air, emit foul air through the ventilator; inhaled type use a ventilation fan to breathe fresh air and foul air discharged from the natural exhaust port; another type suction and exhaust by ventilation fans to complete. Driven by the motor rotating blades driven airflow, indoor and outdoor air exchange air-conditioning appliances. Also known as Tong fan. The purpose of ventilation is to remove the foul air of the room, adjust the temperature, humidity  and feel. The ventilation fans are widely used in homes and public places.

ventilation fan is the most widely used ventilation fans and motors, fan blades, the wind boxes, panels, blinds, and a dedicated cable switch and other ancillary components. The motors generally use single-phase asynchronous motors. 150mm specifications following the ventilator is also a shaded pole motor. Fan in general with the ABS, AS plastic injection molding, the weight is light and high strength. The wind box is usually made ​​of thin steel plate stamping and spot welding, using plastic injection molding. The panel with the plastic injection molding. Shutters usually sheet steel or tin metal forming.