PYHL-14A fire smoke exhaust fan price 3C certification

The noise problem of fans has always been the most difficult problem to solve for users. No matter what type of fans they are, they will produce more or less noise during use. These noises are obviously not in line with the living environment that modern people are pursuing. It gives people It has brought great obstacles to the quality of production and life. Therefore, solving the fan noise problem is an urgent matter. Sometimes we can use some methods to improve the noise of the fan. One of the most common methods is to install a special muffler on the fan. This will reduce some of the noise caused by the exhaust air when the fan is exhausting.
The second method is to add ducts to the existing fan outlet to guide the wind to insensitive places in the residential area, such as the roof, and then concentrate all the ducts to make a large pool where the pool is breathable and use some filtration. The cotton cover can play a certain muffler role. However, the effect of this method is not very great. It can only temporarily eliminate some noise but cannot completely solve the problem.
Another way is that the sound absorption mechanism of porous sound-absorbing materials is that there are countless small interpenetrating pores inside the material. When sound waves impinge on the surface of these materials and then enter these small pores, they will cause internal The air moving close to the hole wall and fiber surface is not easy to move due to friction and viscous motion resistance, so the sound energy is converted into heat energy and consumed. Therefore, sound-absorbing materials with good performance must have porous pores that communicate with each other, and the pores that communicate with each other must be connected to the outside world so that sound waves can enter the interior of the material.
Obviously the third method is better, but it is also the most complicated. Many users cannot complete it independently. Therefore, when choosing a method to eliminate noise, users must do what they can and choose different methods according to different noise sources of the fan. is the key to solving the problem.