High-temperature fans are used in most manufacturing industries, especially in factories that require workers to operate on-site. High-temperature fans are important equipment to protect the health and safety of personnel. However, due to the high power of high-temperature fans, it is inevitable that they will There is a certain amount of noise, so most companies will deliberately choose fans with lower noise when selecting high-temperature fans. Is the noise of high-temperature fans as low as possible?
1) Selection of the noise volume of the high-temperature fan
Generally speaking, the lower the noise, the better it is, which is beneficial to the physical and mental health of personnel in the fan environment, and with the continuous development of fan technology, the problem of noise is gradually being overcome, but the noise generated by high-temperature fans is higher. If the fan is small, its cost will increase correspondingly. About every 10 decibels, the cost of the fan will increase significantly. The noise of most fans will not be lower than 35dBA, so personnel health and high temperature should be considered when selecting models The economy of the fan is not as low as possible.
For example, when the area where the factory buildings and high-temperature fans are located is an uninhabited area, it is only necessary to consider that the noise does not exceed the “red line”, and there is no need to reduce noise and increase costs. And when there are higher-noise equipment in the area where the high-temperature fan is located, you can choose a high-temperature fan whose noise is more than 6dBA lower than the high-temperature fan, which is more economical, and the synthetic noise will also be within a reasonable range. If the noise of the high-temperature fan can be lower than the higher noise Above 10dBA, as far as the fan is concerned, it will not cause any noise impact on the environment at all. If the high-temperature fan is equipped with sound insulation or sound absorption facilities, it is only necessary to consider the impact of Cao Yin transmission.
2) How to control the noise of the high temperature fan
For enterprises, when the cost of lower-noise high-temperature fans is higher than that of sound insulation or sound-absorbing facilities, it should be more economical to use other methods to control the noise generated by high-temperature fans, and there are three specific control methods:
1. Stay away from attenuation method
That is to say, the high-temperature fan is set at a place far from the target, through the natural attenuation of the sound, thereby reducing the impact of the noise. The specific relationship between the noise attenuation and the distance is as follows:
|
Noise distance attenuation value |
|
|
Distance (meters) |
Attenuation value (dBA)< /span> |
|
1 |
8.0 |
|
1.5 |
11.5 |
|
2 |
14.0 |
|
2.5 |
16.0 |
|
3 |
17.5 |
|
4 |
20.0 |
|
5 |
22.0 |
|
6 |
23.5 |
|
7 |
25.0 |
|
8 |
26.0 |
|
9 |
27.0 |
|
10 |
28.0 |
|
15 |
31.5 |
|
20 |
34.0 |
|
25 |
36.0 |
|
30 |
37.5 |
2. Sound insulation method
The sound insulation method mainly uses facilities to isolate the high-temperature fan from the target area, and achieves the effect of reducing noise through the reflection and absorption of the isolation barrier, such as using equipment rooms/equipment layers, soundproof boxes, soundproof glass, etc. As follows:
|
Sound insulation effect of different materials |
|
|
Material name |
Attenuation value (dBA) |
|
24cmBrick wall |
31 |
|
37cmBrick wall |
35 |
|
25mmfoam soundproof cover |
15 |
|
3mmOrdinary glass |
18 |
|
5mmSoundproof glass |
24 |
|
Public soundproof door |
35 |
|
Public sound insulation board |
30 |
3. Physical silencing method
Physical noise reduction mainly uses sound-absorbing materials to eliminate the noise generated by high-temperature fans. It mainly uses loose, porous, and concave-convex materials to make the noise vibration enter the hole and continuously reflect and attenuate. The peaks and valleys of the noise are superimposed and attenuated, thereby achieving the effect of reducing noise. , the main facilities and materials are muffler, muffler box, muffler cover and sound-absorbing cotton.
