Axial flow fan
US8535010B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 3, 2011 |
| Grant date | Sep 17, 2013 |
| Priority date | — |
| Expiry date | Dec 2, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/326
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An axial flow fan including a rotation shaft section to be mounted on the rotation shaft of rotation drive means, an inner blade group provided outside the rotation shaft section so as to be coaxial therewith, and an outer blade group provided outside the inner blade group so as to be coaxial therewith, wherein the inner blade group is formed of a plurality of inner blades provided radially around the rotation shaft section, the outer blade group is formed of a plurality of outer blades provided radially around the rotation shaft section, and the velocity V1 of the wind generated by the inner blade group and the velocity V2 of the wind generated by the outer blade group have a relationship of 1.5V1<V2 by designing the blades of the inner blade group and the outer blade group with respect to number, area, angle and shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.