Noise absorption device for air blower
US9453513B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Mar 25, 2014 |
| Grant date | Sep 27, 2016 |
| Priority date | — |
| Expiry date | May 29, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/664
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An air blower is provided with an upper resonant chamber including an upper cover having an opening, an upper casing having an inlet engaging the opening, the upper casing secured to the upper cover to form a first chamber, first apertures through portions of the upper casing other than the inlet and communicating with the first chamber, and a first noise absorption material in the first chamber; a lower resonant chamber including a lower cover, a lower casing secured to the lower cover to form a second chamber, second apertures through the lower casing and communicating with the second chamber, and a second noise absorption material in the second chamber. The upper casing is on the lower casing to form a flow path. An impeller is in the flow path. In response to resonance, noise can be absorbed by the first and second absorption materials and converted into heat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.