Blower

• US 20080107523A1
• Filed: 01/02/2008
• Published: 05/08/2008
• Est. Priority Date: 01/27/2005
• Status: Active Grant

• Current Assignee: Delta Electronics Incorporated
• Original Assignee: Delta Electronics Incorporated
• Inventors: Lin, Tsu-Liang, Chen, Shi-Han
• Granted Patent: US 7,887,290 B2
• Time in Patent Office: Days
• US Class Current: 415/206
• CPC Class Codes: F04D 29/282 the leading edge of each vane being substantially parallel to the rotation axis
• CPC Class Codes: F04D 29/4213 suction ports
• CPC Class Codes: F04D 29/424 Double entry casings
• CPC Class Codes: F04D 29/663 Sound attenuation
• CPC Class Codes: F05D 2250/70 Shape

Abstract

A blower includes a housing and an impeller. The housing has a main inlet and at least one secondary inlet. The impeller is disposed in the housing and has a hub, a plurality of blades and at least one annular plate. Those blades are disposed around the hub. The annular plate is connected to those blades and partially blocked the secondary inlet.

Claims

1. A blower comprising:

a housing comprising a main inlet and at least one secondary inlet; and

an impeller disposed in the housing and having;

a hub;

a plurality of blades disposed around the hub; and

at least one annular plate connected to the blades and partially blocked the secondary inlet.

2. The blower as claimed in claim 1, wherein the secondary inlet is extended from the periphery of the main inlet or formed near the main inlet independently.

3. The blower as claimed in claim 1, wherein the main inlet is circular, elliptical, polygonal, or irregularly closed shaped, and the secondary inlet is circular, fan-shaped, polygonal, elliptical, or irregularly closed shaped.

4. The blower as claimed in claim 1, wherein when the number of the annular plate is two or more, the annular plates all or partially block the secondary inlet.

5. The blower as claimed in claim 1, wherein the housing is assembled by a first frame and a second frame, and the first frame comprises the main inlet and the secondary inlet, and the second frame comprises the other main inlet.

6. The blower as claimed in claim 5, wherein the second frame comprises the secondary inlet, the impeller comprises the other annular plate connected to the blades, and the other annular plate partially covers the other secondary inlet.

7. The blower as claimed in claim 6, wherein the other secondary inlet is extended from the periphery of the other main inlet, or formed near the other main inlet independently.

8. The blower as claimed in claim 6, wherein the other secondary inlet is circular, fan-shaped, polygonal, elliptical, or irregularly closed shaped, and the other main inlet is circular, elliptical, polygonal, or irregularly closed shaped.

9. The blower as claimed in claim 6, wherein when the number of the other annular plate is two or more, the other annular plates all or partially cover the other secondary inlet.

10. The blower as claimed in claim 1, wherein the main inlet is concentric with the impeller.

11. The blower as claimed in claim 1, wherein when the number of the secondary inlet is two or more, the annular plate all or partially blocks the secondary inlets.

12. The blower as claimed in claim 1, wherein the profile of the blade is flat, curved, streamline, or volute shape.

13. A blower comprising:

a housing comprising a side outlet and a first inlet; and

an impeller disposed in the housing;

wherein the first inlet has a non-circular but symmetrical profile with respect to an axial line of the impeller.

14. The blower as claimed in claim 13, wherein the profile is quadratrical, elliptical, polygonal, non-coaxial circle, or irregularly closed shaped.

15. The blower as claimed in claim 13, wherein a flow tunnel is formed between the impeller and the housing and divided into a high-pressure zone ranging from a narrowest part of the flow tunnel and a low-pressure zone approaching the side outlet.

16. The blower as claimed in claim 15, wherein the first inlet is elliptical and a major axis of the ellipse is near the low-pressure zone.

17. The blower as claimed in claim 15, wherein the first inlet is a non-coaxial circle and biased near the low-pressure zone.

18. The blower as claimed in claim 13, wherein the housing further comprises a second inlet with a second inlet with a second predetermined profile, and wherein the second predetermined profile is quadratrical, elliptical, polygonal, circular failing to concentrate with an axis of the impeller, or irregularly closed shaped.

19. The blower as claimed in claim 13, wherein the housing further comprises a plurality of outer frames assembled by coupling, riveting, engaging or adhesion.

20. The blower as claimed in claim 13, wherein the housing is formed as a single unit by injection, molding, pressing, or cutting.

21. A blower comprising:

a housing comprising an outlet and at least one main inlet; and

an impeller disposed in the housing, wherein a flow tunnel is formed between the impeller and the housing and divided into a high-pressure zone and a low-pressure zone approaching the outlet, wherein the main inlet comprises a protrusion extending from the periphery of the main inlet except a region near the low-pressure zone.