"Waterproof Cooling Fan" in use are also less prone to failure, just as we explain today, so that we can promptly check in daily use. "Waterproof Cooling Fan" is widely used in daily life, inverter, power inverter, welding machines, cabinets, electrical boxes, LED display frequency, sparks machines, packaging machines, computer chassis, air purifiers, medical equipment, instruments and equipment . "Waterproof Cooling Fan" blade cracks or breaks. This phenomenon often occurs in a number of large power plants, the most serious accident or even impeller coaster; motor failure. Such as overcurrent, severe burn out the motor; vane wear. Mainly occurred in the induced draft fan.