Fan with transition chamber for providing enhanced convective flow
US5586865A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 8, 1996 |
| Grant date | Dec 24, 1996 |
| Priority date | — |
| Expiry date | Mar 8, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/601
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Computer apparatus 10 has enhanced convective flow 10F of circulating cooling air provided by improved fan 12. Fan support 12S is secured to the computer apparatus proximate fan port 10P formed in the housing. Fan blade 22B is rotatably mounted within fan support 22S. The propelling action of the fan blade defines a transition path for the cooling air through the fan. Stationary screen 24S is positioned adjacent to the blade traversing the transition path. Transition chamber 26 formed between the screen and the blade also traverses the transition path. The width of the transition chamber defines a transition gap dimension from the screen and to the blade that is optimally selected to enhance the cooling air flow. The transition chamber has a screen region 26S adjacent the screen and a blade region 26B adjacent the blade, and a middle region 26M between the screen region and the blade region. Cooling air flow through the screen and the screen region is generally linear. Cooling air flow through the blade and the blade region has a rotational component. When the transition gap dimension is an optimal, the middle region of the transition chamber is sufficiently wide to allow a flow tr…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.