The noise can not be avoid, when cooling fans are in use, then there is a good way to deal with these annoying noise, the following I teach you how to remove the cooling fan noise method.
General noise at 0 ~ 40dbA, or people are more acceptable range, because the sound is relatively weak, will not have much impact, 40 ~ 80 dBA will appear very loud, it will seriously affect the life and work production Now, this must be dealt with, if the noise above 80DBA, then you have to replace the cooling fan. So what is the way to reduce the fan noise?
1. Disturbance of the flow disturbances caused by disturbances encountered by the fan in the air flow path can cause noise. Any obstruction created, especially at critical inlet and outlet ranges, must be avoided in order to reduce noise.
2. Increase the temperature. The amount of air required for cooling in one system is inversely proportional to the allowable temperature rise. Allow a slight increase in temperature, you can greatly reduce the amount of air required. Therefore, if the restriction imposed on allowable temperature rise is slightly relaxed, the amount of air required will be reduced and the noise will be reduced.
3. Reduce vibration In some cases, the entire system is light weight, or the system must be operated in accordance with a prescribed manner, it is particularly recommended to use soft insulation equipment to avoid fan vibration transmission.
4. Fan speed and size As the high speed fan than the low speed fan produces a lot of noise, so try to try and use low speed fan. A larger, lower speed fan, however, is usually quieter than a small, high speed fan that delivers the same amount of air.
5 impedance level. System Impedance The higher the system impedance, the greater the airflow required for cooling, so to minimize noise, the system impedance must be minimized.
6. Voltage adjustment Cooling fan voltage level will also affect the size of the noise. The higher the voltage applied to the fan, the higher the speed, the greater the vibration and the greater the noise generated.
