Fan noise treatment is to install fan acoustic enclosure, installation of exhaust silencers, to solve the problem of ventilation and heat dissipation, the installation of acoustic doors and acoustic windows, the installation of soundproof wall helps to reduce the noise.
1, the installation of fan acoustic enclosure
Acoustic enclosure structure with steel as the skeleton, acoustic or non-metallic acoustic panels, rock wool and perforated boards constitute the sound-absorbing body. In order to ensure the maintenance of the blower, part of the structure of the acoustic enclosure is designed as a movable acoustic enclosure, and an observation window is set up at the appropriate location.
2, the installation of exhaust muffler
The exhaust noise is pneumatic noise, set up ventilation muffler on the air volume axial fan is an effective measure to reduce noise. General impedance muffler, comprehensive noise reduction effect and cost-effective balance. Distant muffler can get better noise suppression effect, but the actual use of time is not long. In the case of a certain length, the perimeter of the channel should be reasonably designed and the ratio of the truncated area.
3. Solve the ventilation and heat dissipation problem
The fan operates day and night and generates a large amount of heat, so it is necessary to consider the cooling and heat dissipation problem of the fan. The ventilation of the noise barrier adopts forced ventilation, and the ventilation channel is located at the top.
4. Installation of soundproof door and soundproof window
Doors and windows are the weak links of soundproof, and soundproof windows are added to the original windows.
5, the installation of soundproof wall helps to reduce the noise
When setting up the sound barrier, please note that the installation of sound grille is about 1 meter away from the entrance, to ensure that the air inlet of the fan will not be blocked. Inlet noise reduction is less than 10dB, available sheet muffler.