Blade, impeller and fan
US11078921B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 2017 |
| Grant date | Aug 3, 2021 |
| Priority date | — |
| Expiry date | Jan 31, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2240/306
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A blade, an impeller and a fan are provided. A trailing edge (12) of the blade (1) is provided with at least one concave arc segment (15). At least one end point of the at least one concave arc segment (15) is located between a radial outer edge (13) of the blade (1) and a radial inner edge (14) of the blade (1). The blade (1) is provided with at least one ridge structure protruding from a pressure surface (18) of the blade (1) toward a suction surface (17) of the blade (1). The blade is provided with at least one concave arc segment at a trailing edge thereof on the basis of a bionics principle, and is further provided with a ridge structure, thus improving an airflow pattern at the trailing edge of the blade by means of changing a shape of the blade, and reducing noise accordingly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.