The noise of large fans such as Roots blowers is very large. At present, some domestic manufacturers use glass wool and felt composite as sound-absorbing and noise-reducing materials to install on the inner wall of the fan in order to meet the export requirements, but the effect is not very satisfactory, and the sound-absorbing effect cannot be guaranteed. Very complex, and the fibers of fiberglass and felt often drift away with the wind. Joylenge™ melamine foam can withstand wind speeds of 30 m / s (equivalent to 115 km / h), can be used for sound absorption and noise reduction inside the fan. Moreover, Joylenge™ melamine foam is easier to install than glass wool and felt, and the quality is much lighter. The sound absorption effect is much better than that of glass wool and felt. For example, glass wool and felt composites need 20cm to meet the sound absorption effect. The same effect can be achieved by using Joylenge™ melamine foam thickness of 10cm, which not only makes the fan lighter, but also reduces the size of the fan, thus reducing the manufacturing cost.
In addition to the Roots blower, some small and medium-sized fans also need to reduce noise. JoylengeTM melamine foam can be made to meet the size requirements of these small and medium-sized fans, providing excellent sound absorption and noise reduction.
