US 12,228,148 B2
Fan with improved heat dissipation performance and low noise and electronic device having the same
Jing-Shu Chen, Foshan (CN); Yong-Kang Zhang, Shenzhen (CN); and Yung-Ping Lin, New Taipei (TW)
Assigned to CHAMP TECH OPTICAL (FOSHAN) CORPORATION, Foshan (CN)
Filed by CHAMP TECH OPTICAL (FOSHAN) CORPORATION, Foshan (CN)
Filed on May 27, 2022, as Appl. No. 17/826,648.
Claims priority of application No. 202210152383.9 (CN), filed on Feb. 18, 2022.
Prior Publication US 2023/0265863 A1, Aug. 24, 2023
Int. Cl. F04D 29/66 (2006.01); F04D 17/16 (2006.01); F04D 29/30 (2006.01); F04D 29/38 (2006.01); F04D 29/54 (2006.01)
CPC F04D 29/663 (2013.01) [F04D 17/16 (2013.01); F04D 29/30 (2013.01); F04D 29/388 (2013.01); F04D 29/541 (2013.01); F04D 29/666 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A fan comprising:
a hub;
a baffle fixed to an outer circumference of the hub, the baffle comprising a first surface radially outward extending from the hub and a second surface radially outward extending from the hub and opposite to the first surface, and the hub comprising a first part located above the first surface and a second part located above the second surface;
a first blade layer comprising a plurality of first blades, the plurality of first blades arranged on the first surface at intervals, and an end of each of the plurality of first blades connected to the first part, another end of each of the plurality of first blades facing away from the hub radially outward extending out of the baffle to form a first extension portion; and
a second blade layer comprising a plurality of second blades, the plurality of second blades arranged on the second surface at intervals, and an end of each of the plurality of second blades connected to the second part; an orthogonal projection of a portion of each of the plurality of first blades on the baffle located between orthogonal projections of adjacent two of the plurality of second blades on the baffle; a length of the plurality of first blades being greater or less than a length of the plurality of second blades, wherein along a direction from the first blade layer to the second blade layer, the first extension portion extends toward the baffle to form a protruding portion, and the protruding portion is fixed on the baffle and has a connecting surface facing away from the first surface, and the connecting surface is coplanar with the second surface.