How to effectively reduce the noise of the fresh air system

How to effectively reduce the noise of the fresh air system

During the installation and construction of the fresh air system, the fresh air system engineers often encounter that after the fresh air system is installed, the wind speed in the bedroom or study room is too high and the noise is too large, which seriously affects sleep, but the fresh air system cannot be turned on, so deal with This problem becomes a very difficult problem. How to solve the problem of high noise in the fresh air system?

　　 1. Choose a fresh air host with suitable standards

The structural design in the fresh air host and the selection of the motor can ensure that the fresh air system can work continuously for a long time. Such continuous air change is not as good as the short-term air change effect of opening windows, but the fresh air system can In the process of intermittent air change, outdoor air pollution is reduced, and indoor temperature and humidity are kept relatively constant. Therefore, the air volume of the host should be selected according to the relevant national standards. It is enough to blow a piece of facial tissue, and there is no need to feel obvious at the air outlet The wind is over. The noise of the host with such a small air volume will definitely be relatively small.

　　 2. Reasonable piping design

In the process of designing the fresh air system, s* must first consider the layout of pipes and tuyere, and then consider the balance between the wind pressure and wind speed of each tuyere. If the wind pressure difference is too large, through the rigid adjustment of the tuyere, only Increase the noise, especially the air outlets of the bedroom and the study. If it is too close to the host, it is recommended to choose a detour or connect with a silencer hose.

　　 3. Appropriate post-remediation

　　 If the noise problem cannot be solved after the fresh air system is installed and the pipeline is adjusted, then some remedial measures must be considered. The method used is:

　　 1. Change the hardware suspension of the host to a spring suspension to minimize the noise of the host;

2.Paste a layer of silencer cotton on the outside of the host to isolate the noise conduction of the host shell.

　3. Spread a layer of silencing cotton on the ceiling of the suspended ceiling to reduce the noise reverberation of the host installation space and the resonance generated by the ceiling.

　　4. Add a piece of silencer cotton to the turning node of the pipeline or the indoor air supply pipe to increase the wind resistance, slow down the wind speed, and block noise.

　　5. Replace the noisy pipes with aluminum foil hoses, and appropriately extend the length of the hose, and make the hose bend, which can effectively reduce the noise.