The dust-proof and noise of micro-cooling fans, micro-cooling fans are small and mini-cooling fans, which are applied in small space. With the development of science and technology, the more convenient the equipment we request, the better. Therefore, the application of micro-cooling fans will become more and more common. Today we will discuss the noise elements of micro-cooling fans together. We all know that the noise of micro-cooling fans is smaller than that of large size, so what other elements are relevant?
Regarding the computer cooling fan, due to the long working hours every day, in order to extend the life of the cooling fan and reduce the interference of dust on the cooling fan, many customers request the cooling fan to have a dustproof effect. Regarding a range of cooling fan manufacturers, such as 8CM and 9CM cooling fans commonly used in computers, it is possible to do dust-proof and waterproof disposal. Just seal the motor completely, because there is enough space.
For ultra-thin micro fans such as 20*20*6,30*30*7mm and other specifications below 10mm, their own thickness is only 7mm. If a dust cover is added in the middle of the fan blade and outside the motor to seal the motor, it is really not easy, because the space is too small.
In view of the dust prevention problem of micro heat dissipation fans, Yirongchuan Science and Technology proposes that customers adopt our ultra-thin double-ball heat dissipation fans. The balls are imported from Japan and dust is not easy to enter. Only dust, coils and PCB are not allowed in the bearings, and dust has little influence. Therefore, it has strong dust prevention ability and can ensure that the life of the heat dissipation fans is more than twice that of the heat dissipation fans with oil bearings.
The noise index of micro-fans is an important parameter that customers care about. While providing micro-fans, ordinary manufacturers will also provide specifications. One of them is the noise value in decibels (db). Then, how do micro-fan manufacturers control fan noise?
Micro fan noise, mainly control the following two items
First, the wind sound when the fan is running (this is related to the speed, the speed is high, the wind is louder), so if you control the speed of the micro fan, the wind sound can be effectively controlled. In response to wind noise, Yi Rongchuan Science and Technology invited a special organization to make a soundproof room with a background noise of 16DB. Because no sound could be heard, we called it a soundproof room. Then we tested the noise value of a miniature fan with no other noise at a distance of 100cm from the sound sensor.
Second, the mechanical noise, friction sound, electromagnetic sound, and vibration sound when the fan is moving except for the wind, these are all content to be controlled. Regarding mechanical noise, friction sound, and electromagnetic sound, we use human ear audiometry in a relatively silent soundproof room. Trembling sound, using hand sample comparison test.