Effective ways to reduce the noise of ventilation and smoke exhaust equipment

Effective ways to reduce the noise of ventilation and smoke exhaust equipment

1. Reduce the sound source noise of ventilation equipment
　　
In places with high requirements for noise control, low-noise ventilation equipment should be used. Under the agreed air volume and pressure, the centrifugal ventilation equipment of the airfoil blades of different types of ventilation equipment has low noise, and the centrifugal ventilation equipment of the forward version of the blades is noisy. Appropriately reduce the speed of the ventilation equipment. The rotational noise of the ventilation equipment is proportional to the 10th power of the impeller's circumferential speed, and the eddy current noise is proportional to the 6th (or 5th) power of the impeller's circumferential speed. Therefore, reducing the speed can reduce the noise. When designing a ventilation system, the pressure loss of the system should be minimized. When the total volume and pressure loss of the ventilation system is large, it can be divided into small systems. The flow velocity of the air flow in the pipeline should not be too high, so as not to cause regeneration noise. It is affirmed that the airflow velocity in the pipeline should be selected according to the relevant rules according to different requirements.
　　
2. Suppress the noise of ventilation equipment on the transmission route
　　
Install appropriate mufflers on the inlet and outlet of the ventilation equipment. The ventilation equipment is equipped with a damping base, and the inlet and outlet are connected by hoses. Sound insulation treatment for ventilation equipment. Such as equipment ventilating equipment sound insulation cover; lining the ventilating equipment casing with sound-only materials; placing the ventilating equipment in a special ventilation equipment room, and installing sound insulation doors, sound insulation windows or other sound absorption equipment, or in the ventilation equipment There is another duty room etc. indoors.
　　
3. Timely maintenance and maintenance, regular inspection and maintenance, timely replacement of damaged parts, and removal of abnormalities in order to create low-noise operating conditions.