Fan assembly

• US 8,992,174 B2
• Filed: 08/09/2011
• Issued: 03/31/2015
• Est. Priority Date: 01/25/2011
• Status: Active Grant

• Current Assignee: Delta Electronics Incorporated
• Original Assignee: Delta Electronics Incorporated
• Inventors: Chang, Shun-Chen
• Primary Examiner(s): Look, Edward
• Assistant Examiner(s): Flores, Juan G
• Application Number:
  US13/206,371
• Publication Number:
  US 20120189439A1
• Time in Patent Office: 1,330 Days
• Field of Search: 415/212.1, 415/211.2, 415/220, 415/219.1, 415/218.1, 415/222, 415/224, 415/224.5, 415/226, 415/203, 415/204, 415/206, 415/207, 415/182.1
• US Class Current: 415/206
• CPC Class Codes: F04D 25/08 the working fluid being air, e.g. for ventilation
• CPC Class Codes: F04F 5/16 displacing elastic fluids

Abstract

A fan assembly includes a channel structure and a centrifugal fan. The channel structure includes a housing and at least a slit. The housing has an accommodating space and a flow channel adjacent to each other. The slit is extended along the flow channel. The flow channel is communicated with the outside of the housing via the slit. The centrifugal fan is disposed in the accommodating space. The centrifugal fan draws air along an axial direction and generates an airflow. The airflow flows into the flow channel along a radial direction, and flows out to the outside of the housing via the slit.

Claims

1. A fan assembly, comprising:

a channel structure comprising;

a housing comprising an accommodating space and a flow channel; and

at least one slit disposed along the flow channel, wherein the flow channel is communicated with an outside of the housing via the slit; and

a centrifugal fan disposed in the accommodating space, drawing air along an axial direction of the centrifugal fan and generating an airflow to flow into the flow channel along a radial direction of the centrifugal fan,

wherein the airflow flows out from the slit to the outside of the housing,

wherein the channel structure comprises at least one guide channel adjacent to the centrifugal fan, and the guide channel guides the airflow generated by the centrifugal fan to enter the flow channel along the radial direction, and

wherein the guide channel comprises a first guide channel and a second guide channel, and the airflow guided by the first guide channel flows along a first direction, the airflow guided by the second guide channel flows along a second direction, and the first direction is different from the second direction.

2. The fan assembly as claimed in claim 1, wherein the housing comprises at least one air inlet corresponding to the centrifugal fan in the axial direction, and the centrifugal fan draws air from the outside of the housing via the air inlet along the axial direction.

3. The fan assembly as claimed in claim 1, wherein the channel structure comprises a separator, and the first guide channel and the second guide channel are separated by the separator, and the first guide channel and the second guide channel are crossed in the axial direction.

4. The fan assembly as claimed in claim 3, wherein the channel structure is substantially an annular structure, and the first guide channel guides the airflow to flow into the flow channel of the annular structure along a clockwise direction, and the second guide channel guides the airflow to flow into the flow channel of the annular structure along a counter clockwise direction.

5. The fan assembly as claimed in claim 4, wherein the centrifugal fan comprises a motor, a hub, a plurality of first blades and a plurality of second blades, the motor is disposed in the hub, and the first blades and the second blades are disposed around the hub corresponding to the first guide channel and the second guide channel, respectively.

6. The fan assembly as claimed in claim 5, wherein the centrifugal fan further comprises a connection element in the shape of a disk, and the connection element is connected to the hub and the first and second blades, and the connection element is disposed between the first and second blades.

7. The fan assembly as claimed in claim 6, wherein the centrifugal fan comprises a first motor, a first hub, a plurality of first blades, a second motor, a second hub, and a plurality of second blades, the first motor, the first hub and the plurality of first blades correspond to the first guide channel, the second motor, the second hub and the second blades correspond to the second guide channel, the first and second motors are disposed in the first and second hubs, respectively, and the first and second blades are disposed around the first and second hubs, respectively.

8. The fan assembly as claimed in claim 7, wherein the first and second motors are separated by the separator.

9. The fan assembly as claimed in claim 1, wherein the flow channel comprises a channel portion and a gradually narrowed terminal portion.

10. The fan assembly as claimed in claim 9, wherein the terminal portion is gradually narrowed from an end of the terminal portion to an another end of the terminal portion, and the slit is disposed on an edge of the terminal portion away from channel portion.

11. The fan assembly as claimed in claim 9, wherein a cross section of the channel portion is substantially in a rectangular shape.

12. The fan assembly as claimed in claim 9, wherein a cross section of the flow channel is substantially in a winged shape, and a cross section of the channel portion is substantially in an arc shape.

13. The fan assembly as claimed in claim 9, wherein a cross section of the terminal portion is substantially in a V shape.

14. The fan assembly as claimed in claim 9, wherein the slit is disposed on the channel portion, and the housing has an overlapped part parallel to a flowing direction of the airflow adjacent to the slit.

15. The fan assembly as claimed in claim 9, wherein the housing has an inner side wall adjacent to the flow channel, and a cross section of the inner side wall is substantially parallel to the flow direction and straightly extended.

16. The fan assembly as claimed in claim 1, wherein the channel structure further comprises a slit channel communicated with the slit, and the housing has a first inner wall and a second inner wall adjacent to the flow channel, wherein the first inner wall and the second inner wall are substantially parallel to the flow direction and overlapped to each other, and the slit channel is formed at an overlapped part of the first inner wall and the second inner wall.

17. The fan assembly as claimed in claim 1, wherein the channel structure is substantially an annular structure, and an inner side of the annular structure has an air space, and the slit is extended around the inner side of the annular structure and the air space.

18. The fan assembly as claimed in claim 1, further comprising a base, wherein the channel structure is supported by the base.

19. The fan assembly as claimed in claim 1, wherein the centrifugal fan is disposed at an end of the channel structure adjacent to the base, or at an another end of the channel structure opposite to the base.

20. The fan assembly as claimed in claim 1, wherein the channel structure comprises a plurality of annular structures, and the centrifugal fan is disposed at a connecting portion of the annular structures.

21. The fan assembly as claimed in claim 1, wherein the channel structure comprises an annular structure and a plurality of guide structures, and the guide structures are connected to an inner annular surface of the annular structure, and the centrifugal fan is disposed on a connecting portion of the guide structure and located at the center of the annular structure.

22. The fan assembly as claimed in claim 21, wherein the guide structures comprise a first guide structure along a longitudinal direction and a second guide structure along a transverse direction.

23. The fan assembly as claimed in claim 1, wherein the channel structure is substantially an annular structure, and the annular structure has an air space therein, wherein the air space has an intake side and an exhaust side, and the airflow flows out from the slit to the outside of the housing to enable air in the air space to move from the intake side to the exhaust side.

24. A fan assembly, comprising:

a channel structure comprising;

a housing comprising an accommodating space and a flow channel; and

at least one slit disposed along the flow channel, wherein the flow channel is communicated with an outside of the housing via the slit; and

a centrifugal fan disposed in the accommodating space, drawing air along an axial direction of the centrifugal fan and generating an airflow to flow into the flow channel along a radial direction of the centrifugal fan,

wherein the airflow flows out from the slit to the outside of the housing,

wherein the channel structure comprises a plurality of annular structures, and the centrifugal fan is disposed at a connecting portion of the annular structures.

25. The fan assembly as claimed in claim 24, wherein the housing comprises at least one air inlet corresponding to the centrifugal fan in the axial direction, and the centrifugal fan draws air from the outside of the housing via the air inlet along the axial direction.

26. The fan assembly as claimed in claim 24, wherein the flow channel comprises a channel portion and a gradually narrowed terminal portion.

27. The fan assembly as claimed in claim 26, wherein the terminal portion is gradually narrowed from an end of the terminal portion to an another end of the terminal portion, and the slit is disposed on an edge of the terminal portion away from channel portion.

28. The fan assembly as claimed in claim 26, wherein a cross section of the channel portion is substantially in a rectangular shape.

29. The fan assembly as claimed in claim 26, wherein a cross section of the flow channel is substantially in a winged shape, and a cross section of the channel portion is substantially in an arc shape.

30. The fan assembly as claimed in claim 26, wherein a cross section of the terminal portion is substantially in a V shape.

31. The fan assembly as claimed in claim 26, wherein the slit is disposed on the channel portion, and the housing has an overlapped part parallel to a flowing direction of the airflow adjacent to the slit.

32. The fan assembly as claimed in claim 26, wherein the housing has an inner side wall adjacent to the flow channel, and a cross section of the inner side wall is substantially parallel to the flow direction and straightly extended.

33. The fan assembly as claimed in claim 24, wherein the channel structure further comprises a slit channel communicated with the slit, and the housing has a first inner wall and a second inner wall adjacent to the flow channel, wherein the first inner wall and the second inner wall are substantially parallel to the flow direction and overlapped to each other, and the slit channel is formed at an overlapped part of the first inner wall and the second inner wall.

34. The fan assembly as claimed in claim 24, further comprising a base, wherein the channel structure is supported by the base.