Housing for fan units, and electrical apparatus using a fan unit
US6386843B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2000 |
| Grant date | May 14, 2002 |
| Priority date | — |
| Expiry date | Jun 29, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D25/0613
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A housing for a fan unit has a opening defined by an inner peripheral wall being formed with an expanded section for enlarging a part of the opening so that the speed of the air flowing from a predetermined direction and into the opening is higher than the speed of the air flowing from other directions. Since a part of the opening is enlarged, the flowing resistance of the airflow at the portion provided with the expanded section is low as compared with that at other portions. Therefore, the airflow speed increases for the air flowing from a predetermined direction in the electrical apparatus toward the air inlet of the fan unit, and a larger volume of air is thereby drawn into the air passage and is efficiently exhausted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.