How can we achieve the sound insulation of ventilation ducts? Today, Baowang ventilation will give you a brief introduction.
There are two sources of noise in ventilation ducts. One is mechanical vibration noise. This is due to the noise caused by the high-speed vibration of the wind vane, fan and equipment shell when the equipment is running. The other is aerodynamic noise. This is the main noise source generated by the air flow in the ventilation duct, and it is also the subject of noise treatment in the ventilation duct.
The noise treatment methods of ventilation pipe include:
Elbow of air duct
Noise may be generated when air flows through pipe bends. The noise can be reduced by setting air duct elbows on the front and rear air ducts. Jinan ventilation duct manufacturer introduces that when aerodynamic noise passes through the air duct elbow, the noise will be greatly attenuated after refraction and absorption.
Ceiling return air
In other words, the whole ceiling space where the air duct is installed is a return air box, which can not only reduce noise, that is, save space, but also achieve the purpose of sound insulation.
Noise reduction and sound absorption
Vibration can be reduced by applying vibration control coating to the pipeline. In addition, the transmission of noise can be further reduced by wrapping the air duct with sound insulation materials and absorbing sound.
The air duct needs to rely on the wall panel and be hung with shockproof suspenders to prevent the transmission of vibration. In the same way, the pipes connected to power equipment should not only climb over the wall, but also use soft connections to reduce the transmission path of vibration. If necessary, pass the duct through the wall to provide vibration isolation and acoustic seal.
Air duct deformation
Baowang ventilation believes that in addition to the above air duct noise control measures, the purpose of noise control can also be achieved by changing the structure of the air duct itself. After the improvement of ventilation duct, not only the vibration of pipe wall will be greatly weakened, but also the pulsating sound of air flow can be greatly weakened by sound absorption. The use of this new pipe structure with silencing elbow, silencing static pressure box and ventilation muffler makes noise control very useful. Generally speaking, no later noise control measures are required. In addition, a long air return outlet can be installed under the motor as an access port for maintenance.