Moisture-proof cooling fan icon

 

Moisture-proof cooling fan parameters

 

Moisture-proof cooling fan curve

 

Appearance drawing of moisture-proof cooling fan

 

Moisture-proof cooling fan noise

In addition to the heat dissipation effect, the working noise of the fan is also a common concern. Fan noise is the size of the noise generated by the fan when it is working. It is affected by many factors, and the unit is decibel (dB). When measuring the noise of the cooling fan sunon, it needs to be carried out in an anechoic chamber with noise less than 17dB, one meter away from the cooling fan sunon, and aligned with the air inlet of the fan along the direction of the fan shaft, and the A-weighted method is used for measurement. The spectral characteristics of the sunon noise of the cooling fan are also very important, so it is also necessary to use a spectrum analyzer to record the noise frequency distribution of the fan. Generally, the noise of the fan should be as small as possible, and there should be no abnormal sound.

The cooling fan sunon is related to friction and air flow. The higher the fan speed and the larger the air volume, the louder the noise will be. In addition, the vibration of the fan itself is also a factor that cannot be ignored. Of course, the vibration of a high-quality fan will be very small, but the first two are difficult to overcome. To solve this problem, we can try to use a larger size fan. In the case of the same air volume, the working noise of the large fan at low speed should be smaller than that of the small fan at high speed. Another factor that we tend to ignore is the bearing of the fan. When the fan rotates at high speed, there is friction and collision between the shaft and the bearing, so it is also a main source of sunon noise of the cooling fan.

 

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