Counter-rotating axial-flow fan
US7872381B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 2007 |
| Grant date | Jan 18, 2011 |
| Priority date | — |
| Expiry date | Jan 19, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K9/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A counter-rotating axial-flow fan is provided that is capable of increasing effect of cooling a stator. One or more through-holes 83 penetrating support frame bodies (21, 75) in the axial direction are formed in support frame bodies 21 and 75. One or more vent holes 57a for introducing air, sucked from a suction port 19, into a cup-like member 51 are formed in a bottom wall portion 57 of a cup-like member 51 of a first impeller 9. One or more vent holes 111a for discharging air, introduced into an internal space of a second motor 61, to the outside are formed in a bottom wall portion 111 of a cup-like member 105 of a second impeller 63.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.