"Industrial Ventilation Fan" said the fan, also known as a fan, fan machine, is a use of a motor-driven rotating blades to achieve accelerated air flow appliances, mainly used in hot weather and cool air circulation. Widely used in homes, offices, shops, hospitals and hotels and other places. "Industrial Ventilation Fan" mainly by the fan head, fan, grille and control devices and other components. Fan header includes a motor, front and rear end caps and shook his head blowing institutions. Fans of the main components are: AC motor. Its working principle is: energized coil in a magnetic field force and rotation. The electrical energy into mechanical energy, and because the coil resistance, it is inevitable that part of the energy to be converted into heat. Axial fans are common "Industrial Ventilation Fan" In essence, that is, the flow of wind blades parallel to the axis of rotation.