Axial fan unit
US7942627B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 20, 2009 |
| Grant date | May 17, 2011 |
| Priority date | — |
| Expiry date | Jul 30, 2029 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/544
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A serial axial fan unit includes a first axial fan arranged to rotate about a central axis, a flow control device connected to the first axial fan along the central axis, and a second axial fan connected to the flow control device along the central axis. The flow control device preferably includes a wind tunnel portion, a base portion, and a plurality of flow control vanes. A flow of air caused by rotation of first blades has a whirl velocity component in substantially the same direction as the rotation direction thereof. This whirl velocity component is converted to a velocity component in a direction parallel or substantially parallel to the central axis by interference of first stationary vanes. The above arrangement provides an improvement in air volume characteristics of a serial axial fan unit including two axial fans arranged in series.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.