For computer cooling fans, because they work for a long time every day, in order to extend the life of the cooling fan and reduce the interference of dust on the cooling fan, many customers require the cooling fan to be dust-proof. For some large-scale cooling fan manufacturers, such as the commonly used 8CM and 9CM cooling fans in computers, it is possible to do dust and waterproof treatments. It is enough to seal the motor, because there is enough space.

For ultrathin miniature fans below 10mm, such as 20*20*6, 30*30*7mm and other specifications, their thickness is only 7mm. If you need to add a dustproof inside the fan blade and outside the motor It is really not easy to cover the motor completely, because the space is too small.

Aiming at the dustproof problem of miniature cooling fans, Huizhou Huihexing recommends that customers use our ultra-thin double-ball cooling fans. The balls are imported from Japan and are not easy to enter. As long as there is no dust, coils, and PCB accessories in the bearings, there are Dust also has little effect, so it has a strong dust-proof ability, which can ensure that the life of the cooling fan is more than double that of the cooling fan with oil bearing.

The noise index of a micro fan is an important parameter that customers are more concerned about. Generally, when a manufacturer provides a micro fan, it will also provide the corresponding specification. One of the items is the noise value in decibels (db). Then, the micro fan manufacturer How to control fan noise? The noise of the micro fan mainly controls the following two items.

First of all, the wind sound when the fan is running (this is related to the speed, the speed is high, the wind sound is louder), so the wind sound can be effectively controlled by controlling the speed of the micro fan. Regarding wind noise, Yirongchuan Technology asked to focus on the organization and built a soundproof room with a background noise of 16DB. Since there is almost no sound, we call it an anechoic room, and then remove the micro fan without other noise The distance of the sensor is 100 cm, and the noise value is tested.

Second, the mechanical noise, friction, electromagnetic sound, and shaking sound except wind noise when the fan rotates are all content to be controlled. For mechanical noise, friction sound, and electromagnetic sound, we use human ear audiometry in a relatively quiet soundproof room. The shaking sound is tested by hand-feel sample comparison.