US20120279696A1

US20120279696A1 - Heat dissipation device

Info

Publication number: US20120279696A1
Application number: US13/215,243
Authority: US
Inventors: Wei-Hang Hsu
Original assignee: Foxconn Technology Co Ltd
Current assignee: Foxconn Technology Co Ltd
Priority date: 2011-05-06
Filing date: 2011-08-23
Publication date: 2012-11-08
Also published as: TW201245942A

Abstract

A heat dissipation device includes a plurality of fins connected to each other. Each fin includes a plate and a pair of flanges extending from the plate. Each flange includes a first section extending perpendicularly away from the plate, a third section extending perpendicularly towards the plate and a second section interconnecting the first section and the third section. The first section is parallel to the third section and the second section is parallel to the plate. Three channels are defined by the first flange, the second flange and the plate for allowing airflow to flow through the fins.

Description

BACKGROUND

1. Technical Field
The present disclosure relates to heat dissipation devices, and more particularly, to a heat dissipation device having large heat dissipation areas.
2. Description of Related Art
Electronic components generate a large amount of heat in operation thereof. Therefore, heat dissipation, often in a form of device, is required for the electronic components. As shown in FIG. 1, a typical heat dissipation device 90 includes a plurality of fins fixed to each other. The fins each have a planar shape with two flanges locked with that of an adjacent fin. A plurality of channels are defined between adjacent fins for allowing airflow to flow through the fins.
However, the heat dissipation areas of the typical heat dissipation device 90 are limited, and cannot meet heat dissipation requirement of high power electronic components.
What is needed, therefore, is a heat dissipation device which can overcome the limitations described above.

BRIEF DESCRIPTION OF THE DRAWINGS

Many aspects of the present disclosure can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the views.

FIG. 1 is a side view of a conventional heat dissipation device.

FIG. 2 is an isometric view of a heat dissipation device in accordance with a first embodiment of the present disclosure.

FIG. 3 is an enlarged view of a fin of the heat dissipation device of FIG. 2.

FIG. 4 is a side view of the fin of FIG. 3.

FIG. 5 is a side view of the heat dissipation device of FIG. 2.

FIG. 6 is a side view of a fin of a heat dissipation device in accordance with a second embodiment of the present disclosure.

FIG. 7 is a side view of a fin of a heat dissipation device in accordance with a third embodiment of the present disclosure.

DETAILED DESCRIPTION

Referring to FIGS. 2-3, a heat dissipation device 10 in accordance with a first embodiment of the present disclosure is shown. The heat dissipation device 10 includes a plurality of fins 20 connected to each other along a lateral direction.
Also referring to FIGS. 4-5, each fin 20 includes a plate 30 and a pair of flanges 210, 220 extending from two opposite ends of the plate 30, respectively. The plate 30 is planar and extended along a vertical direction. The plate 30 has a rectangular shape with an upper corner being cut away. The plate 30 has a top side 312, a bottom side 313 parallel to the top side 312, a right side 315 interconnecting right ends of the top side 312 and the bottom side 313, an inclined side 310 extending downwardly from a left end of the top side 312, and a left side 314 extending upwardly from a left end of the bottom side 313 and connecting the inclined side 310 at a joint 311. The two flanges 210, 220 are similar to each other, each including a first section 211, 221 perpendicular to the plate 30, a second section 212, 222 perpendicular to the first section 211, 221 and parallel to the plate 30, and a third section 213, 223 perpendicular to the second section 212, 222 and parallel to the first section 211, 221. The first sections 211, 221 and the third sections 213, 223 of the upper flange 210 and the lower flange 220 have the same width. The second section 212 of the upper flange 210 has a height smaller than the second section 222 of the lower flange 220. The lengths of the first section 211, the second section 212 and the third section 213 of the upper flange 210 along an extending direction of the top side 312 are less than that of the lower flange 220, respectively. The first section 211 of the upper flange 210 extends from the top side 312 of the plate 30, the second section 212 of the upper flange 210 is bended downwardly from a front end of the first section 211, and the third section 213 of the upper flange 210 is bended inwardly from a bottom end of the second section 212 and fixed to the plate 30. The first section 221 of the lower flange 220 extends from the bottom side 313 of the plate 30, the second section 222 of the lower flange 220 is bended upwardly from a front end of the first section 221, and the third section 223 of the lower flange 220 is bended horizontally and inwardly from a top end of the second section 220 and connected to the plate 30. The two flanges 210, 220 are fixed to the plate 30 by soldering or other suitable methods. The two flanges 210, 220 and the plate 30 can also be integrally made from one piece of metal sheet.
The upper flange 210 encloses an upper channel 41 together with the plate 30, the lower flange 220 encloses a lower channel 42 together with the plate 30, and the third sections 213, 223 of the upper flange 210 and the lower flange 220 define a middle channel 43 together with the plate 30. The upper channel 41 has an inner size smaller than that of the lower channel 42 so that more airflow can flow through the lower channel 42. The upper channel 41, the middle channel 43 and the lower channel 42 provide different pathways for the airflow flowing through the fins 20. The upper channel 41 and the lower channel 42 has a right opening flush with the right side 315 of the plate 30, and a left opening spaced a distance from the inclined side 310 and the left side 314 of the plate 30, respectively. That is to say, the upper channel 41 and the lower channel 42 are terminated within a periphery range of the plate 30. Therefore, the airflow flowing out of the left openings of the upper channel 41 and the lower channel 42 can disturb with the airflow flowing through the middle channel 43 at a left area of the plate 30, thereby increasing heat exchange with the plate 30.
FIG. 6 shows a fin 20 a of a heat dissipation device in accordance with a second embodiment of the present disclosure. The fin 20 a includes a plate 30 a and a pair of flanges 210 a, 220 a each including a first section 211 a, 221 a, a second section 212 a, 222 a and a third section 213 a, 223 a. The plate 30 a of this embodiment has a configuration same as that of the plate 30 of the first embodiment, and the flanges 210 a, 220 a of this embodiment have configurations same as that of the flanges 210, 220 of the first embodiment except the third sections 213 a, 223 a. In this embodiment, the third sections 213 a, 223 a of the upper flange 210 a and the lower flange 220 a are spaced from the plate 30 a, two gaps are defined between the plate 30 a and corresponding distal ends of the third sections 213 a, 223 a, so that the upper channel 41 a and the lower channel 42 a communicate with the middle channel 43 a via the gaps all over the length thereof. The upper flange 210 a and the lower flange 220 a are directly bended from the plate 30 a.
FIG. 7 shows a fin 20 b in accordance with a third embodiment of the present disclosure. Different from the first embodiment and the second embodiment, the upper flange 210 b and the lower flange 220 b of this embodiment each only include the first section 211 b, 221 b, and the plate 30 b further forms a middle flange 230 b which includes a first section 231 b, a second section 232 b and a third section 233 b. The first section 231 b and the third section 233 b of the middle flange 230 b are perpendicularly connected to the plate 30 b, and the second section 232 b of the middle flange 230 b is connected to the first section 231 b and the third section 233 b and parallel to the plate 30 b. The first sections 211 b, 231 b of the upper flange 210 b and the middle flange 230 b and the plate 30 b cooperatively define an upper channel 41 b, the middle flange 230 b and the plate 30 b cooperatively enclose a middle channel 43 b, and the first section 221 b of the lower flange 220 b, the third section 233 b of the middle flange 230 b and the plate 30 b cooperatively define a lower channel 42 b. The upper channel 41 b, the middle channel 43 b and the lower channel 42 b are separated from each other along the length thereof. The upper flange 210 b and the lower flange 220 b are directly bended from the plate 30 b, and the middle flange 230 b is fixed to the plate 30 b by soldering or other suitable methods.
According to the foresaid embodiments, the flanges 210, 210 a, 210 b of the fins 20, 20 a, 20 b each have a plurality of parts non-coplanar with each other. So, the fins 20, 20 a, 20 b of the heat dissipation device 10 have large areas by increasing the areas of the flanges 210, 210 a, 210 b, 220, 220 a, 220 b, 230 b, whereby the heat dissipation capacity of the heat dissipation device 10 is enhanced.
It is believed that the present embodiments will be understood from the foregoing description, and it will be apparent that various changes may be made thereto without departing from the spirit and scope of the present disclosure or sacrificing all of its material advantages, the examples hereinbefore described merely being preferred or exemplary embodiments.

Claims

1. A heat dissipation device comprising:

a plurality of fins, each of the fins comprising:

a plate; and

a first flange comprising a first section extending from the plate along a direction away from the plate, a third section extending along a direction towards the plate, and a second section interconnecting the first section and the second section, the first section, the second section and the third section are non-coplanar with each other.

2. The heat dissipation device of claim 1, wherein the first section is perpendicular to the plate.

3. The heat dissipation device of claim 2, wherein the second section is parallel to the plate.

4. The heat dissipation device of claim 2, wherein the third section is parallel to the first section.

5. The heat dissipation device of claim 1, wherein the each of the fins further comprises a second flange extending from the plate, the second flange comprising a first section extending away from the plate, a third section extending towards the plate and a second section interconnecting the first section and the second section.

6. The heat dissipation device of claim 5, wherein the first section of the second flange is parallel to the first section of the first flange, the second section of the second flange is parallel to the second section of the first flange, and the third section of the second flange is parallel to the third section of the first flange.

7. The heat dissipation device of claim 5, wherein the first flange is extended from a top side of the plate, and the second flange is extended from a bottom side of the plate.

8. The heat dissipation device of claim 7, wherein the first flange and the plate enclose a first channel, the second flange and the plate enclose a second channel, and the third sections of the first flange and the second flange and the plate cooperatively define a third channel.

9. The heat dissipation device of claim 8, wherein the third channel is located between the first channel and the second channel.

10. The heat dissipation device of claim 8, wherein the second channel has a length more than that of the first channel.

11. The heat dissipation device of claim 8, wherein the second channel has a width more than that of the first channel.

12. The heat dissipation device of claim 8, wherein the third sections of the first flange and the second flange are directly connected to the plate so that the first channel, the second channel and the third channel are separated from each other along the length thereof.

13. The heat dissipation device of claim 8, wherein the third sections of the first flange, the second flange are spaced gaps from the plate so that the first channel, the second channel and the third channel communicate with each other along length thereof.

14. The heat dissipation device of claim 8, wherein the first channel and the second channel are terminated within a periphery range of the plate so that airflow flowing out of the first channel and the second channel disturb with airflow flowing through the third channel at a place within the periphery range of the plate.

15. The heat dissipation device of claim 14, wherein the first channel and the second channel have first openings flush with a lateral side of the plate, and second openings spaced intervals from an opposite lateral side of the plate.

16. The heat dissipation device of claim 1, wherein each of the fins further comprises a second flange and a third flange, the second flange and the third flange are respectively located at a top side and a bottom side of the plate and the first flange is located at a middle of the plate.

17. The heat dissipation device of claim 16, wherein each of the second flange and the third flange comprises a first section parallel to the first section of the first flange.

18. The heat dissipation device of claim 17, wherein the first sections of the first flange and the second flange and the plate cooperatively define a first channel, the first section of the third flange and the third section of the first flange and the plate cooperatively define a second channel, and the first flange and the plate cooperatively enclose a third channel.

19. The heat dissipation device of claim 18, wherein first channel, the second channel and the third channel are separated from each other along the length thereof.

20. The heat dissipation device of claim 18, wherein the third channel is located between the first channel and the second channel.