A cooling fan is a device used to reduce the temperature of a device's housing or electronic components. These devices usually consist of a motor, fan blades, housing and drive components. The fan usually works on the principle of suction air cooling, whereby external air is drawn in, accelerated by the fan blades and discharged into the equipment casing or electronic components. In this way, the heat generated inside the equipment can be released through the air flow to achieve the purpose of lowering the temperature.

Different types of cooling fans have different working principles and applicable scenarios. Mixed-flow cooling fans dissipate heat mainly by changing the direction of airflow; square cooling fans and centrifugal cooling fans work in different application scenarios.

When choosing a cooling fan, several factors need to be considered, such as the brand of the fan, appearance, bearings, noise and vibration. Fans from well-known brands usually offer better quality and performance, while fans with sturdy, burr-free surfaces, moderately thin and thick fan blades, low noise and vibration, and temperatures that are not too high are more suitable for long-term use.

The use of cooling fan environment is also very important, should be kept neat, inlet and outlet should not have debris, regularly clean the fan surface and dust in the pipeline. At the same time, the cooling fan needs regular cleaning and maintenance to ensure its normal operation.

In the use of cooling fan, need to pay attention to the power supply line must be a dedicated line, should not be used for a long time with temporary line power supply, in order to avoid the motor moisture. If abnormal phenomena are found during operation, it should be stopped immediately for inspection.