Centrifugal fan
US12416313B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2024 |
| Grant date | Sep 16, 2025 |
| Priority date | — |
| Expiry date | Sep 4, 2044 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2250/52
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A centrifugal fan includes a frame and an impeller rotatably disposed in the frame. The frame has an air inlet and an air outlet. The impeller includes a plurality of blades and an upper ring. The upper ring is connected to the blades and is located between the blades and an upper cover of the frame. The upper cover has a first annular groove and a second annular groove. The first annular groove and the second annular groove are provided on an inner surface of the upper cover and are arranged around the air inlet. The upper ring has a first annular projection and a second annular projection. The first annular projection axially extends towards the first annular groove. The second annular projection extends towards the second annular groove and is bent away from the air inlet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.