US 11,965,522 B2
Impeller
Pei-Han Chiu, Taoyuan (TW); Chien-Ming Lee, Taoyuan (TW); Chung-Yuan Tsang, 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. 28, 2022, as Appl. No. 17/586,786.
Application 17/586,786 is a continuation in part of application No. 16/710,739, filed on Dec. 11, 2019, granted, now 11,236,760, issued on Feb. 1, 2022.
Application 16/710,739 is a continuation in part of application No. 15/010,648, filed on Jan. 29, 2016, granted, now 10,539,149, issued on Jan. 12, 2020.
Claims priority of application No. 201510923160.8 (CN), filed on Dec. 11, 2015; and application No. 202122039432.1 (CN), filed on Aug. 27, 2021.
Prior Publication US 2022/0145899 A1, May 12, 2022
Int. Cl. B63H 1/26 (2006.01); F04D 29/34 (2006.01); F04D 29/38 (2006.01); F04D 29/66 (2006.01)
CPC F04D 29/34 (2013.01) [F04D 29/384 (2013.01); F04D 29/66 (2013.01)] 22 Claims
OG exemplary drawing
 
1. An impeller, comprising:
a hub; and
a plurality of blades surrounding the hub, each of the blades comprising a leading edge, a blade tip, a root portion, a trailing edge, a windward side and a leeward side;
wherein each of the blades is connected to the hub through the root portion, the leading edge is connected to the hub and the blade tip at peripheral, and the trailing edge is opposite to the leading edge and is connected to the hub and the blade tip;
wherein each of the blades is approximately a curved thin plane, one surface of the blade is the windward side and another surface of the blade is the leeward side opposite to the windward side; and
wherein the windward side comprises a first turning point and a second turning point located at a line connecting midpoints of the blade, a first vertical height difference is formed from the blade tip to the first turning point, a second vertical height difference is formed from the first turning point to the second turning point, and the first vertical height difference is greater than the second vertical height difference.