US 11,053,946 B2
Mixed-flow fan
Shun-Chen Chang, Taoyuan (TW); Shih-Di Chen, Taoyuan (TW); and Chao-Fu Yang, Taoyuan (TW)
Assigned to DELTA ELECTRONICS, INC., Taoyuan (TW)
Filed by DELTA ELECTRONICS, INC., Taoyuan (TW)
Filed on Jan. 18, 2019, as Appl. No. 16/251,937.
Application 16/251,937 is a continuation in part of application No. 15/944,125, filed on Apr. 3, 2018, granted, now 10,557,476.
Claims priority of application No. 201710829145.6 (CN), filed on Sep. 14, 2017.
Prior Publication US 2019/0154042 A1, May 23, 2019
Int. Cl. F04D 19/00 (2006.01); F04D 29/62 (2006.01); F04D 25/08 (2006.01); F04D 29/52 (2006.01); F04D 17/06 (2006.01); F04D 25/06 (2006.01)
CPC F04D 19/002 (2013.01) [F04D 17/06 (2013.01); F04D 25/0613 (2013.01); F04D 25/08 (2013.01); F04D 29/526 (2013.01); F04D 29/626 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A mixed-flow fan, comprising:
a base;
an outer cover disposed on the base;
a motor disposed on the base, and located in the outer cover;
a hub located between the outer cover and the motor, wherein the hub is configured to rotate about a central axis, wherein the hub comprises a first outer surface and a second outer surface connected to the first outer surface and inclined relative to the first outer surface, and a slope of the first outer surface relative to the central axis is greater than a slope of the second outer surface relative to the central axis; and
a blade connected to the first outer surface and the second outer surface;
wherein the base comprises a first side surface adjacent to the second outer surface, and a slope of the first side surface relative to the central axis is equal to the slope of the second outer surface relative to the central axis.