US 12,146,502 B2
Impeller and fan employing same
Kuo-Tung Hsu, Taoyuan (TW); Shun-Chen Chang, Taoyuan (TW); Chao-Fu Yang, Taoyuan (TW); and Li-Han Hung, Taoyuan (TW)
Assigned to Delta Electronics, Inc., Taoyuan (TW)
Filed by Delta Electronics, Inc., Taoyuan (TW)
Filed on Sep. 2, 2020, as Appl. No. 17/010,706.
Claims priority of provisional application 62/896,741, filed on Sep. 6, 2019.
Prior Publication US 2021/0071681 A1, Mar. 11, 2021
Int. Cl. F04D 29/28 (2006.01)
CPC F04D 29/282 (2013.01) 12 Claims
OG exemplary drawing
 
1. An impeller, comprising:
a hub;
a plurality of first blades disposed around the hub separately, wherein each of the plurality of first blades is connected with a periphery of the hub;
a plurality of second blades disposed around the hub separately, wherein each of the plurality of second blades is disposed away from the periphery of the hub and located between two adjacent first blades of the plurality of first blades; and
a connecting member disposed around the hub and penetrated through the plurality of first blades and the plurality of second blades, wherein the connecting member is not in contact with a first edge of any side of each of the plurality of first blades, and the connecting member is not in contact with a second edge of any side of each of the plurality of second blades;
wherein the hub comprises an axis center, a first line is formed between a first leading edge of the Nth first blade of the plurality of first blades and the axis center, a second line is formed between the first leading edge of the (N+1)th first blade of the plurality of first blades and the axis center, a third line is formed between a second leading edge of the Mth second blade and the axis center, wherein the second leading edge of the second blade is located between the Nth first blade and the (N+1)th first blade, wherein a first angle is formed between the first line and the third line, a second angle is formed between the second line and the third line, and the magnitude of the first angle is not equal to that of the second angle, wherein a fourth line is formed between the first leading edge of the (N+2)th first blade of the plurality of first blades and the axis center, wherein a first combination angle is formed between the first line and the second line, a second combination angle is formed between the second line and the fourth line, and the magnitude of the first combination angle is equal to that of the second combination angle;
wherein the first line of the first blade only includes the first blade itself but no other first blades.