The characteristics of the cooling fan itself are different from other products. Brushless cooling fan actively stirs the air and accelerates the airflow, so it also sucks in dust. There are two main aspects of inhaling dust. One is sucked into the bearing and the other is sucked into the rotor and stator. Inhalation of dust more or less affects the cooling fan, causing the fan to slow down and even stop the fan in severe cases.

Commonly used dust-proof cooling fan design methods generally have the following three aspects:

1. When designing, increase the height of the outer frame where the motor is installed to allow the motor to sink, reduce the distance between stator and rotor, and reduce dust entry.

2. Using double ball bearings, the balls have a certain degree of dust resistance, and the bearings are not susceptible to serious interference.

3. Add a dust-proof net cover to the cooling fan, which is durable and can effectively prevent dust from entering the fan blade area.

The above three aspects can effectively protect the cooling exhaust fan from the influence of dust, particles, etc., causing the damage of the fan or hindering the rotation of the blades. Compared with ordinary fans, dust-proof cooling fans have more stable running speed, better heat dissipation performance and longer relative service life.