Diffusion muffling device, diffusion resonance muffling device, full-frequency diffusion muffling device, muffling system for ventilation channel, and muffling method using the same
US11536487B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2019 |
| Grant date | Dec 27, 2022 |
| Priority date | — |
| Expiry date | Jun 16, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24F2013/245
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Embodiments of the present disclosure provide a diffusion muffling device, a diffusion resonance muffling device, a full-frequency diffusion muffling device, a muffling system for a ventilation channel, and a muffling method using the same, which include a plurality of diffusion muffling units disposed in the ventilation extension direction of the ventilation channel, wherein the plurality of diffusion muffling units are arranged in parallel in a direction with a predetermined angle between the direction and the ventilation extension direction of the ventilation channel, and a muffling passage is formed between each two adjacent diffusion muffling units, wherein each of the diffusion muffling units includes at least one diffuser, and each diffuser includes a plurality of convex portions so that sound waves entering the muffling passage are reflected multiple times in the muffling passage by the plurality of convex portions and then sound is attenuated. In the present disclosure, the diffusers are disposed to diffuse and reflect sound waves, so that the sound is attenuated in a long and narrow passage by multiple times of reflections of the sound waves, thereby improving the low-fre…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.