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Time：2021-12-25Views：0
What are the main factors related to the noise produced by the miniature cooling fan? How should we reduce the noise of micro fans? What are the main factors related to noise? The noise of the miniature electric fan is related to the conflict force and air flow. The higher the speed and the greater the air volume, the greater the noise caused. The sensation of other miniature fans is also a factor that cannot be ignored. Of course, the high-quality mini-fan will have a small sensation, but the first two are difficult to overcome.
Noise is the size of the noise generated during the operation of the miniature fan, which is affected by many factors, and the unit is decibels (dB). When measuring the noise of a miniature fan, it needs to be carried out in an anechoic room with a noise of less than 17dB, one meter away from the fan, and aligned with the air inlet of the fan along the direction of the miniature fan's axis of rotation. The A-weighted method is used for measurement. The spectral characteristics of the noise of the miniature fan are also very important, so it is necessary to use a spectrum analyzer to record the noise frequency distribution of the miniature fan. Generally, the noise of the miniature fan is required to be as small as possible, and there should be no abnormal sound.
How can we reduce the noise of the miniature fan? To deal with this problem, we can test the use of larger-scale electric fans. When the air volume is the same, the operating noise of a large electric fan at a lower speed should be smaller than that of a small electric fan at a high speed. Another factor that we easily overlook is the bearing of the miniature electric fan. Because the shaft and the bearing will collide with each other when the miniature electric fan rotates at high speed, it is also a main source of noise of the miniature electric fan.
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