When the machine is running, the fan will have noise, so how to reduceDC cooling fanWhat about the noise? The following small series for everyone to analyze
1. System impedance (SystemImpedance)
The range between the air inlet and the air outlet of a shell accounts for 60% to 80% of the impedance of the whole system. In addition, the larger the gas flow, the higher the noise. The higher the system impedance, the greater the gas flow required for heat dissipation, so in order to minimize noise, the system impedance must be minimized.
2. Gas flow disturbance
Disturbance caused by obstructions encountered along the gas flow path can cause noise. Therefore, any obstruction, especially in the critical air inlet and outlet areas, must be avoided to reduce noise.
3. Fan speed and dimensions
Since high-speed fans cause greater noise than low-speed fans, low-speed fans should be tried and selected as much as possible. A fan with a larger size and a lower speed is usually quieter than a fan with a lower size and a higher speed when delivering the same air volume.
4. Increased temperature
In a system, the amount of air required to dissipate heat is inversely proportional to the allowable temperature rise. Allowing a slight increase in temperature rise can greatly reduce the required air volume. Therefore, if the restrictions on the forced allowable temperature rise are slightly relaxed, the required air volume will be reduced and the noise will be reduced.
5. Vibration
In some cases, the weight of the entire system is very light, or the system must be in accordance with a certain way to operate, it is particularly recommended to use soft insulation equipment to avoid the transmission of fan vibration.
6. Voltage variation
Voltage variations can affect noise levels. The higher the voltage applied to the fan, the greater the vibration and the greater the noise due to the increased speed.
7. Design considerations
The design concept of each part of the fan will affect the noise level. The following design considerations can achieve noise reduction: the outer dimensions of the wound core, the design concept of the fan blade and the outer frame, and the precise manufacturing and balance.
The above is how to reduce the noise of DC cooling fan. For more relevant information, please refer to our official website!