The noise of the cooling fan is a very vague concept. Here, the experts of Shenzhen Fengwang Factory explain to you the classification of cooling fan noise. There are two types of noise:
 First, mechanical noise:
  To solve the mechanical noise of the micro fan, it is necessary to start from the fan's material and assembly. The following causes may cause the fan to have a loud sound:

 1. The sensor IC touches the magnetic strip of the micro fan and generates friction sound.

2. The motor components of the micro fan - the coil is ground to the blade

3. The wrong size of the assembly structure, bearing oil ring

4 bearing and shaft material issues, itself will produce noise

Second, the fan's wind

 The solution to the fan noise of the mini fan is in the design segment: mainly in the angle of the blade, the shape, and the resistance of the wind product, which is designed to some fine work, dynamics, mechanics, electronics and other fields in mainland China. At present, there are no experts and supporting equipment in this area. Most of them are Japanese, or Taiwan's fan-shaped molds are the same. There is one additional point that needs to be added is the assembly of micro-fans to the micro-projector. It also produces noise.