Axial fan and refrigerator
US10767658B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 24, 2017 |
| Grant date | Sep 8, 2020 |
| Priority date | — |
| Expiry date | Jun 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 according to an exemplary embodiment of the present disclosure includes an impeller, a motor, and a housing. The impeller is configured to rotate about a rotation axis extending in a vertical direction. The motor is configured to rotationally drive the impeller. The housing is disposed radially outside the impeller and the motor. In a region overlapping in the vertical direction with the impeller, an inner wall surface of the housing includes at least one first wall having a narrow gap with a radially outer edge of the impeller and at least one second wall having a wide gap with the radially outer edge of the impeller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.