Labyrinth type ventilation and silencer shutters

Abstract

According to sound attenuation shutters, low-frequency noise must be prevented from being leaked out while the ventilation condition is improved. Two shutter devices with peninsula region properties are combined, and a certain spatial distance is arranged between joint surfaces for decompressing and eliminating the pressure and the intensity of noise waves leaking outwards from the interior while the noise enters a large space region instantaneously. The ventilation requirement of ventilation and sound attenuation shutters is unidirectional, the noise source propagation is unidirectional and opposite to the ventilation direction, so that the labyrinth type ventilation and sound attenuation shutters which have a peninsula dispersing effect, namely, a resistance sound attenuation mode, are designed directed at the above natures. According to the shutters, large-range spatial size changing propagation passages are arranged to damage propagation stability and energy of noise waves, and meanwhile, the air flow requirement is not affected by sandwich space and the large-range spatial changing propagation passages. The sandwich space is provided with spatial conditions capable of holding devices such as hidden protective screens, cellular sound attenuation screen plates and hidden airflow adjustment shutters.

Description

[0001] Field [0002] The patent of the present invention relates to a labyrinth-type ventilation and sound-absorbing louver for ventilation and noise reduction to improve internal working conditions and the surrounding environment in environments where severe low-frequency noise occurs, such as indoor substations. Background technique [0003] Places such as indoor substations are typical environments where severe low-frequency noise sources occur. In order to eliminate and reduce the pollution and harm caused by such noise sources to the environment, noise reduction measures such as isolation and absorption must be used to control them. Therefore, in such typical places, use such as Acoustic doors, sound-absorbing walls and sound-absorbing windows and other equipment and devices are very necessary. In this environment, there are also serious heat dissipation and ventilation needs. Therefore, in addition to forced ventilation with power, use shutters with sound-absorbing funct...

AI Technical Summary

Problems solved by technology

3. It is an impedance combined type. The existing A-shaped double-sided noise-absorbing louver is a typical representative device. This kind of sound-absorbing louver is folded into an A-shaped base plate with a color-coated steel plate, and then the sound-absorbing cotton is installed inside and arranged up and down. The shutter parts formed by combination leave a certain ventilation space between the parts, so that the noise will be weakened when the air flows through the curved passage formed by the overlapping of the A-shaped parts. The passing distance is too short, and the single A-shaped noise-reducing ventilation channel still cannot greatly reduce and eliminate the leakage of low-frequency noise and pollute the environment. Therefore, after meeting the ventilation requirements in this type of workplace, The blinds must have the effect of isolating and eliminating noise leakage and the ability to urgently need to be greatly improved

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