Air moving apparatus and method of optimizing performance thereof
US6293753A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 2000 |
| Grant date | Sep 25, 2001 |
| Priority date | — |
| Expiry date | Mar 3, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S415/914
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An air moving device in the form of an axial flow fan is provided that is adapted for use in substantially enclosed high-density electrical systems, e.g. computers and the like. The fan includes an annular wall extending about the blades thereof and in which pressure equalizing openings are formed for increasing the maximum pressure in the preferred operating area of the fan and just before the stall effect occurs due to increasing system pressure resistance. A method is also provided for optimizing the number and size of the slots to obtain a desired maximum pressure increase. The slots are optimized so that there is no appreciable airflow loss in early stages of the preferred operating area while providing the desired increase in maximum pressure. The slots preferably have an elongated shape, e.g. rectangular or oval, with a major dimension extending generally axially and parallel to the axis of rotation of the blades, and are spaced from each other circumferentially about the annular wall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.