Precautions when selecting a heat dissipation fan for a communication device

When we select the cooling fan for the communication equipment, in addition to focusing on whether the air volume of the cooling fan can meet the heat dissipation requirements of the equipment, we also need to pay attention to the noise problem. The cause of the noise of the cooling fan is generally attributed to two points: one is the fan blade rotation when cutting air, called discrete noise; The second is when the air generated by the cooling fan runs into obstacles, which is called broadband noise. If the communication equipment has high requirements for noise, it is necessary to start from the above two reasons to reduce the noise to the greatest extent. For the noise generated by fan blade rotation, the solution can start from the heat dissipation fan manufacturers, requiring heat dissipation fan manufacturers to strengthen the design ability, continue to optimize the design of high performance, low noise airfoil; Or evaluate the accurate system characteristics in the early stage, and cooperate with the fan supplier to select the cooling fan in the high efficiency working range in the system. For the reduction of broadband noise, the solution can be started from optimizing the system air duct of communication equipment and eliminating as much as possible the obstacles blocking the air intake of fans. Human wisdom is infinite, noise reduction cabinets, sound-absorbing materials are also applied to noise reduction, to minimize the noise.