A fan is a mechanical machine that relies on input mechanical energy to increase gas pressure and deliver gas. It is a driven fluid machine. It is mainly composed of wind blades, blinds, window opening mechanism, motor, pulley, air inlet hood, inner frame, casing, safety net and other components. When the machine is turned on, the motor drives the blades to rotate, and the window opening mechanism opens the blinds to exhaust the air. The shutters are automatically closed when the machine is stopped. It is widely used for ventilation, dust extraction and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and air intake of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances Drying and selection of grain; inflation and propulsion of wind tunnel sources and hovercraft.
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