"Waterproof Cooling Fan" is a motor having a fan hub, and the vane motor, the fan along the outer circumference of the hub and have a uniform distribution of grooves, the blade inserted in the groove, by welding, bonding or the like permanently coupled to the blade and a fan hub, the method become one. The overall balance of the fan motor, and can save hours of work required to adjust the balance, the weight ratio of the bolt connection type "Waterproof Cooling Fan" to reduce the more than 30 percent. Using vibration and noise of the utility model motor runtime has decreased. Despite the fan motor has a high reliability, but it is still mechanical devices, while long-term use, the speed may be reduced or stopped, so it is best to "Waterproof Cooling Fan" real-time monitoring of running status, to facilitate timely find the problem. Use alarm sensor in the fan speed is lower than an alarm signal when a certain threshold, and the speed signal output can achieve real-time monitoring of fan speeds.