US 12,313,080 B2
Impeller and fan assembly
Dongyang Dai, Changsha (CN); Chuanwei Liao, Changsha (CN); Jian Li, Changsha (CN); Linglin Wu, Changsha (CN); Liping Huang, Changsha (CN); Qinming Zeng, Changsha (CN); and Yufeng Peng, Changsha (CN)
Assigned to Bosch Automotive Products (Changsha) Co., Ltd., Changsha (CN)
Filed by Bosch Automotive Products (Changsha) Co., Ltd., Changsha (CN)
Filed on Aug. 22, 2024, as Appl. No. 18/812,183.
Claims priority of application No. 202322472982.1 (CN), filed on Sep. 12, 2023; and application No. 202410397680.9 (CN), filed on Apr. 2, 2024.
Prior Publication US 2025/0084866 A1, Mar. 13, 2025
Int. Cl. F04D 29/32 (2006.01); F04D 25/08 (2006.01)
CPC F04D 29/329 (2013.01) [F04D 25/08 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An impeller comprising:
a hub (100) having an axial direction (A-A) as a rotation axis and extending from a first end (101) to a second end (102), and including an end surface (110) extending perpendicular to the axial direction (A-A) and a first wall (121), wherein the end surface (110) is positioned at the first end (101) of the hub (100), one end of the first wall (121) extends around an entire periphery of the end surface (110) and radially outwardly extends at an angle toward the second end (102) in the axial direction (A-A), wherein a length of extension of the first wall (121) in the axial direction (A-A) is greater than 50% of a length of extension of the hub (100) from the first end (101) to the second end (102) in the axial direction (A-A); and
a plurality of blades (200), proximal ends (201) of which extend from a periphery of the hub (100) in a radial direction (R-R);
wherein, a predetermined range of angle (A1) is formed between the first wall (121) and the axial direction (A-A), and the predetermined range of angle (A1) is between 3 degrees and 45 degrees.