It has been mentioned before that the cooling fan will have a certain amount of noise, as long as it is within a reasonable noise range, it will not affect the normal use of the fan. But what if the normal noise is exceeded?

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How does the DC cooling fan reduce noise?

It has been mentioned before that the cooling fan will have a certain amount of noise, as long as it is within a reasonable noise range, it will not affect the normal use of the fan. But what if the normal noise is exceeded?
4 ways how to reduce cooling fan noise.

Noise Reduction Method (1): System Impedance
The range between the air inlet and the air outlet of a case accounts for 60% to 80% of the total system impedance. In addition, the larger the airflow, the higher the noise of the cooling fan. The higher the system impedance, the greater the airflow required for cooling, so in order to minimize noise, the system impedance must be minimized.

Noise Reduction Method (2): Airflow Disturbance
Noise is generated by turbulence caused by obstructions encountered along the airflow path. Therefore, any obstruction of the cooling fan, especially in the critical air inlet and outlet areas, must be avoided to reduce noise.

Noise Reduction Method (3): Fan Size
Since high speed fans produce more noise than low speed fans, low speed fans should be tried and used whenever possible. And a larger fan with a lower speed is usually quieter than a smaller fan with a higher speed while delivering the same amount of air.

Noise reduction method (4): temperature increase
In a system, the air volume required for cooling is inversely proportional to the allowable temperature rise. The fan allows for a slight increase in temperature, which can significantly reduce the required air volume. Therefore, if the restrictions imposed on the allowable temperature rise are slightly relaxed, the required air volume can be reduced, and the noise level can also be reduced.

Silence with Performance: Reducing Noise in Cooling Fan Applications

How does the wine cooler use cooling fan to solve the noise?

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OUTDOOR SCENE

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