IMPELLER

• US 20180252237A1
• Filed: 06/09/2017
• Published: 09/06/2018
• Est. Priority Date: 03/01/2017
• Status: Abandoned Application

• Current Assignee: Cooler Master Co. Ltd.
• Original Assignee: Cooler Master Co. Ltd.
• Inventors: LIN, Fu-Lung, CHEN, Chun-Hsien
• Application Number:
  US15/619,073
• Publication Number:
  US 20180252237A1
• Time in Patent Office: Days
• CPC Class Codes: F04D 25/0613 the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
• CPC Class Codes: F04D 29/281 for fans or blowers
• CPC Class Codes: F04D 29/30 Vanes
• CPC Class Codes: F04D 29/666 by means of rotor construction or layout, e.g. unequal distribution of blades or vanes

Abstract

An impeller includes a wheel hub and a plurality of blades. The blade has a blade root, and the blade connects to the wheel hub through the blade root. The blades have different lengths. Each blade has an included angle between the blade root and the wheel hub, and the included angles of the blades are different. A centroid of the blades is located at an axis center of the impeller. The impeller is further configured with a blade reinforcement structure.

Claims

1. An impeller, comprising:

a wheel hub; and

a plurality of blades, wherein each of the blades has a blade root, the blade connects to the wheel hub through the blade root, the blades have different lengths, each of the blades has an included angle between the blade root and the wheel hub, the included angles of the blades are different, and a centroid of the blades is located at an axis center of the impeller.

2. The impeller of claim 1, wherein the included angles of the blades are changed gradually in order, and the lengths of the blades are gradually changed corresponding to the gradually changed included angles, so that the centroid of the blades is located at the axis center of the impeller.

3. The impeller of claim 2, wherein the lengths of the blades and the included angles of the blades are gradually changed with an equal difference.

4. The impeller of claim 2, wherein a difference of the lengths of adjacent two of the blades is 1%˜

10%.

5. The impeller of claim 2, wherein a difference of the included angles of adjacent two of the blades is 1%˜

10%.

6. The impeller of claim 1, wherein noise frequencies caused by the blades are different.

7. The impeller of claim 1, further comprising:

a blade enhancement structure disposed around the wheel hub and connecting to the blades.

8. The impeller of claim 1, wherein the blades are a balanced asymmetric structure, so that the centroid of the blades is located at the axis center of the impeller.

9. An impeller, comprising:

a wheel hub;

a plurality of blades, wherein each of the blades has a blade root, the blade connects to the wheel hub through the blade root, the blades have different lengths, each of the blades has an included angle between the blade root and the wheel hub, the included angles of the blades are different, and a centroid of the blades is located at an axis center of the impeller; and

a blade enhancement structure disposed around the wheel hub and connecting to a part of the blades.

10. The impeller of claim 9, wherein the blade enhancement structure is disposed on two or more of the blades.

11. The impeller of claim 9, wherein the blade enhancement structure is discontinuously disposed around the wheel hub to connect the blades.