A cooling fan is a device that accelerates air flow and helps dissipate heat from equipment. Common cooling fan sizes are 3CM, 4CM, 5CM, 6CM, 7CM, 8CM, 92CM, 12CM, 14CM, 15CM, 20CM, 28CM, 33CM, etc., with airflow ranging from 266CFM to 81,191CFM. Choosing the right cooling fan is based on the size of the device, heat generation, internal design, silent demand and other factors.

There are four main types of cooling fans: axial, mixed-flow, centrifugal and cross-flow. Axial fans are suitable for occasions requiring high flow rates and medium air pressure, centrifugal fans are suitable for occasions with large air pressure and limited flow rates, and mixed flow fans are suitable for occasions with high flow rates and relatively high air pressure. Each of these four types of fans has its own characteristics, for example, axial fans have high airflow and low noise, and are suitable for computers, servers and other equipment; centrifugal fans have high airflow and high noise, and are suitable for air conditioners, refrigerators and other equipment; and mixed-flow fans have high airflow and low noise, and are suitable for automobiles, aeroplanes and other equipment.

As the technology of cooling fan is gradually refined, the major industries will have higher and higher requirements for cooling fans. The life of a cooling fan is affected by many factors, including the environment, dust and power supply. In a high temperature environment, high dust environment and unstable power supply, cooling fans are prone to various problems, including equipment heating, affecting the cooling effect, equipment aging, wear and tear. Fan life is not only affected by the production process and materials used, but also the environment, dust and power supply may affect its life.