Axial fan and refrigerator
US10781826B2 · kind B2 · utility
3Cited by
12References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2017 |
| Grant date | Sep 22, 2020 |
| Priority date | — |
| Expiry date | Jul 10, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25D2317/0681
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An axial fan includes an impeller, a motor, and a housing. The impeller is configured to rotate about a rotation axis extending in a vertical direction; a motor configured to rotationally drive the impeller. The housing is disposed radially outside the impeller and the motor. An inner wall surface of the housing includes a groove recessed radially outward and extending in the vertical direction. At least a first end of the groove in the vertical direction extends to one end of the housing in the vertical direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.