The hotel exhaust fan makes a sound of switching on and off

The sound of the hotel exhaust fan turning on and off caused problems with the quality of the fan product itself. According to the query of relevant public information, we learned that the hotel exhaust fan has a sound of switching on and off. The exhaust fan product itself has a quality problem. An after-sales engineer from Jingde Electromechanical Technology said that, for example, the motor bearings are worn, there is too much dust on the blades, and the exhaust fan blades and guides Friction in the flow volute, or distortion of the exhaust fan body caused by improper installation, will cause the exhaust fan to produce noise.