Centrifugal type blower unit
US6299409A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1999 |
| Grant date | Oct 9, 2001 |
| Priority date | — |
| Expiry date | Apr 5, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/703
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a centrifugal type blower unit, a diameter of an air suction port is set to be larger than a minimum inner diameter of a centrifugal fan, and a slanting portion is formed in each blade of the centrifugal fan at a side of the air suction port so that an inner radius dimension of the centrifugal fan is increased toward the air suction port. Therefore, it can prevent sub-flow air which is sucked into the centrifugal fan from an end side of the blades in an axial direction from interfering with main-flow air which is sucked into the centrifugal fan from an inner radius side of the blades. Thus, the blower unit can reduce second noise generated therefrom without greatly reducing air-blowing capacity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.