| US 7,614,851 B2 | ||
| Centrifugal fans and impellers thereof | ||
| Lobato Lu, Taoyuan Hsien (Taiwan); Ke-Nan Wang, Taoyuan Hsien (Taiwan); and Wen-Shi Huang, Taoyuan Hsien (Taiwan) | ||
| Assigned to Delta Electronics, Inc., Taoyuan Hsien (Taiwan) | ||
| Filed on Nov. 06, 2006, as Appl. No. 11/593,114. | ||
| Claims priority of application No. 94139633 A (TW), filed on Nov. 11, 2005. | ||
| Prior Publication US 2007/0110574 A1, May 17, 2007 | ||
| Int. Cl. F04D 29/28 (2006.01) | ||
| U.S. Cl. 416—186R [416/203; 29/889.4] | 18 Claims |
| 1. A centrifugal fan, providing an air-inflow and an air-outflow in different directions, comprising:
a hub covering a driving device; and
an impeller surrounding the hub and rotated together with the hub, comprising:
a first blade set surrounding the hub and comprising a first combining portion and
a plurality of first blades, wherein the first combining portion is connected to the first blades; and
a second blade set comprising a second combining portion and a plurality of second blades, wherein the second combining portion
is connected to the second blades;
wherein the first blade set is assembled with the second blade set by assembling the first combining portion with the second
combining portion, and each of the second blades is located between two of the first blades.
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