How to reduce noise of cooling fan

The noise level of the cooling fan determines whether the customer is ready to select this fan. No matter which cooling fan works, it will generate noise. This is allowed in the range of 0~40dBA. If the noise increases with the working time of the cooling fan, the cooling fan can be used to reduce the noise.

1. When selecting the cooling fan, if possible, please select a cooling fan with low speed ratio and large size, and consider heat dissipation. Generally speaking, compared with low-speed cooling fans, low speed ratio and large size cooling fans have less noise when delivering exhaust of the same volume.

2. The working voltage of the cooling fan power transformer is the key to determine the noise of the electric fan. The higher the working voltage, the higher the working speed, the greater the vibration, and the noise will also increase.

3. The noise is caused by the cyclone obstacles encountered by the cooling fan during operation, especially around the key air inlet and ventilation, to avoid blocking and reduce noise.

4. The air displacement required by the cooling fan is inversely proportional to the allowable temperature rise. If a slight rise in temperature is allowed, the amount of exhaust required will be significantly reduced. Therefore, if the limit of forced temperature rise is slightly released, the required exhaust volume will be reduced and the noise will be reduced.

5. The use of cooling fan bearing also determines the noise of CPU radiator to a certain extent. If low-quality bearings are used, the fan will generate noise during operation due to bearing wear after a period of use. Therefore, if the budget is not considered when selecting the cooling fan, better bearings need to be selected to prolong the life of the fan and reduce the noise problem when using the fan in the future.

DC fan, EC fan, CPU heat sink