U.S. patent application number 13/169049 was filed with the patent office on 2012-11-01 for heat dissipation device with heat pipe.
This patent application is currently assigned to FOXCONN TECHNOLOGY CO., LTD.. Invention is credited to WEI LI, HAO-XIA LIU, XUE-WEN PENG, JI-YUN QIN.
Application Number | 20120273168 13/169049 |
Document ID | / |
Family ID | 47055102 |
Filed Date | 2012-11-01 |
United States Patent
Application |
20120273168 |
Kind Code |
A1 |
PENG; XUE-WEN ; et
al. |
November 1, 2012 |
HEAT DISSIPATION DEVICE WITH HEAT PIPE
Abstract
An exemplary heat dissipation device includes a base and
fasteners. The base includes a bottom plate, a top plate, a heat
pipe, and a frame. The heat pipe is sandwiched between peripheries
of the bottom plate and the top plate. The frame is sandwiched
between the bottom plate and the top plate. The frame surrounds the
heat pipe. The fasteners extend through the top plate, the frame
and the bottom plate for fixing the heat dissipation device to a
heat-generating component.
Inventors: |
PENG; XUE-WEN; (Shenzhen
City, CN) ; LI; WEI; (Shenzhen City, CN) ;
QIN; JI-YUN; (Shenzhen City, CN) ; LIU; HAO-XIA;
(Shenzhen City, CN) |
Assignee: |
FOXCONN TECHNOLOGY CO.,
LTD.
Tu-Cheng
TW
FU ZHUN PRECISION INDUSTRY (SHEN ZHEN) CO., LTD.
Shenzhen City
CN
|
Family ID: |
47055102 |
Appl. No.: |
13/169049 |
Filed: |
June 27, 2011 |
Current U.S.
Class: |
165/104.26 |
Current CPC
Class: |
F28D 15/0275 20130101;
H01L 23/427 20130101; H01L 2924/0002 20130101; H01L 23/4006
20130101; H01L 2924/0002 20130101; H01L 2924/00 20130101; F28D
15/0233 20130101 |
Class at
Publication: |
165/104.26 |
International
Class: |
F28D 15/04 20060101
F28D015/04 |
Foreign Application Data
Date |
Code |
Application Number |
Apr 28, 2011 |
CN |
201110107912.5 |
Claims
1. A heat dissipation device comprising: a base comprising a bottom
plate, a top plate, a heat pipe sandwiched between the bottom plate
and the top plate, and a frame sandwiched between peripheries of
the bottom plate and the top plate and surrounding the heat pipe;
and a plurality of fasteners extending through the top plate, the
frame and the bottom plate for fixing the heat dissipation device
to a heat-generating component.
2. The heat dissipation device of claim 1, wherein the frame
comprises a plurality of supporting portions, and each of the
supporting portions is sandwiched between corresponding edge
portions of the bottom plate and top plate.
3. The heat dissipation device of claim 2, wherein a plurality of
connecting portions is formed at corners of the frame, the
fasteners extending through the connecting portions of the
frame.
4. The heat dissipation device of claim 2, wherein each of the
supporting portions has a transversewidth less than that of the
heat pipe.
5. The heat dissipation device of claim 1, wherein the heat pipe
has a flat bottom wall in contact with the bottom plate and a flat
top wall in contact with the top plate.
6. The heat dissipation device of claim 1, wherein the top plate
and the bottom plate each are rectangular, and the frame has a
rectangular profile corresponding to that of the bottom plate and
the top plate.
7. The heat dissipation device of claim 6, wherein the frame has
outer edges matching with edges of the bottom plate and top
plate.
8. The heat dissipation device of claim 1, wherein each of the
bottom plate and the top plate is a monolithic, one-piece body of
copper, and the frame is a monolithic, one-piece body of
aluminum.
9. The heat dissipation device of claim 1, further comprising a fin
assembly mounted on the top plate of the base, the fasteners
extending through corners of the base.
10. A base for absorbing heat from a heat-generating component, the
base comprising: a bottom plate; a top plate; a heat pipe
sandwiched between the bottom plate and the top plate; and a frame
sandwiched between peripheries of the bottom plate and the top
plate and surrounding the heat pipe, the frame comprising a
plurality of connecting portions at corners thereof, and a
plurality of through holes being defined through the top plate, the
connecting portions of the frame and the bottom plate for fasteners
to extend through and fix the base to the heat-generating
component.
11. The base of claim 10, wherein each of the supporting portions
has a width less than that of the heat pipe.
12. The base of claim 10, wherein the heat pipe has a flat bottom
wall in contact with the bottom plate and a flat top wall in
contact with the top plate.
13. The base of claim 10, wherein the frame has a rectangular
profile corresponding to that of the bottom plate and the top
plate.
14. The base of claim 13, wherein the top plate and the bottom
plate each are rectangular, and the frame has outer edges matching
for edges of the bottom plate and top plate.
15. The base of claim 10, wherein the bottom plate and the top
plate each are integrally made of copper as one piece, and the
frame is integrally made of aluminum.
16. The base of claim 10, wherein the bottom plate, the top plate
and the frame together form a hermetical chamber to contain working
fluid between outer wall of the heat pipe and inner wall of the
frame.
17. A heat dissipation device comprising: a base comprising a
bottom plate, a top plate, and a frame sandwiched between
peripheries of the bottom plate and the top plate, the bottom
plate, the top plate and the frame cooperatively defining a chamber
therebetween; a generally serpentine heat pipe received in the
chamber and sandwiched between the bottom and top plates, wherein a
size of a rectangular area within the frame occupied by the entire
heat pipe is at least one half of a corresponding area of the
chamber within the frame; working fluid contained in the heat pipe;
and a plurality of fasteners configured to be seated on the top
plate with portions of the fasteners extendable through the top
plate, the frame and the bottom plate for fixing the heat
dissipation device to a heat-generating component.
18. The heat dissipation device of claim 17, wherein the chamber is
hermetical and contains working fluid between an outer wall of the
heat pipe and an inner wall of the frame.
19. The heat dissipation device of claim 17, wherein the frame
comprises a plurality of beams, and each of the beams is sandwiched
between corresponding edge portions of the bottom plate and top
plate.
20. The heat dissipation device of claim 17, wherein a plurality of
connecting portions is formed at corners of the frame, with the
portions of the fasteners extendable through the connecting
portions of the frame.
Description
BACKGROUND 1. Technical Field
[0001] The disclosure relates to heat dissipation devices in
electronics, and more particularly to a heat dissipation device
with a heat pipe.
[0002] 2. Description of Related Art
[0003] During operation of an electronic device such as a computer
central processing unit (CPU), a large amount of heat is often
produced. The heat must be quickly removed from the CPU to prevent
it from becoming unstable or being damaged. Typically, a heat
dissipation device is attached to an outer surface of the CPU to
absorb the heat from the CPU.
[0004] Conventionally, a heat dissipation device includes a solid
metal base attached to the CPU, and a plurality of fins arranged on
the base. The base is intimately attached to the CPU, thereby
absorbing the heat generated by the CPU. Most of the heat
accumulated on the base is transferred firstly to the fins and then
dissipates away from the fins. Thus the heat dissipation device
achieves cooling of the CPU. However, as electronics technology
continues to advance, increasing amounts of heat are being
generated by powerful state-of-the-art CPUs. As a result, many
conventional heat dissipation devices are no longer able to
effectively remove heat from these CPUs.
[0005] What is needed, therefore, is a heat dissipation device
which can overcome the limitations described.
BRIEF DESCRIPTION OF THE DRAWINGS
[0006] Many aspects of the present embodiments 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 embodiments. Moreover, in the drawings, like reference
numerals designate corresponding parts throughout the several
views.
[0007] FIG. 1 is an assembled, isometric view of a heat dissipation
device in accordance with a first embodiment of the disclosure.
[0008] FIG. 2 is an exploded view of the heat dissipation device of
FIG. 1.
[0009] FIG. 3 is an exploded view of a base of the heat dissipation
device of FIG. 2.
[0010] FIG. 4 is a partially assembled view of the base of FIG.
3.
[0011] FIG. 5 is a cross-sectional view of a base of the heat
dissipation device of FIG. 2, taken along a line V-V thereof.
[0012] FIG. 6 is similar to FIG. 5, but showing a cross-sectional
view of a base of a heat dissipation device in accordance with a
second embodiment of the disclosure.
DETAILED DESCRIPTION
[0013] Referring to FIGS. 1-2, a heat dissipation device 100 in
accordance with a first embodiment of the disclosure is shown. The
heat dissipation device 100 is used to thermally contact an
electronic component (not shown) mounted on a printed circuit board
(not shown) to dissipate heat generated by the electronic
component. The heat dissipation device 100 includes a base 10, a
fin assembly 30 mounted on the base 10, and four fasteners 50
extending through four corners of the base 10.
[0014] Referring also to FIGS. 3-5, the base 10 is substantially
rectangular. The base 10 includes a bottom plate 11, a top plate
12, a frame 13 sandwiched between the bottom plate 11 and the top
plate 12, and a heat pipe 14 enclosed by the frame 13, the bottom
plate 11 and the top plate 12. In particular, the bottom plate 11,
the top plate 12, and the frame 13 together enclose a chamber (not
labeled) to receive the heat pipe 14 therein. The bottom plate 11
and the top plate 12 each are integrally made of metal having good
thermal conductivity. That is, each of the bottom plate 11 and the
top plate 12 is a monolithic, one-piece body of metal. In this
embodiment, the bottom plate 11 and the top plate 12 each are
integrally made of copper. The bottom plate 11 defines four through
holes 110 at four corners thereof. The top plate 12 defines four
through holes 120 at four corners thereof, corresponding to the
through holes 110 of the bottom plate 11.
[0015] When viewed side-on, the frame 13 has a rectangular profile
corresponding to that of the bottom plate 11 and the top plate 12.
The frame 13 defines an opening (not labeled) in a center thereof.
The frame 13 is made of aluminum; and in this embodiment, the frame
13 is a monolithic, one-piece body of aluminum. The frame 13
includes four supporting portions 131 formed at four sides thereof,
respectively. In the illustrated embodiment, the supporting
portions 131 are in the form of beams. The supporting portions 131
surround the heat pipe 14. In this embodiment, each of the
supporting portions 131 has a transverse width less than that of
the heat pipe 14. Each of the supporting portions 131 is sandwiched
between corresponding edge portions of the bottom plate 11 and top
plate 12. The frame 13 also includes four connecting portions 133
respectively formed at four corners thereof. Each of the connecting
portions 133 defines a through hole 130 therein, corresponding to
the through holes 110, 120 of the bottom and top plates 11, 12.
Bottom surfaces of the supporting portions 131 and the connecting
portions 133 are all coplanar to tightly contact a top surface of
the bottom plate 11. Similarly, top surfaces of the supporting
portions 131 and the connecting portions 133 are all coplanar to
tightly contact a bottom surface of the top plate 12.
[0016] The heat pipe 14 is a vacuum casing containing a working
fluid 16 therein. In this embodiment, the heat pipe 14 is generally
S-shaped. The heat pipe 14 includes a middle evaporation section
141, two condensation sections 143 arranged at opposite sides of
the evaporation section 141 and parallel to the evaporation section
141, and two connecting sections 142 interconnecting the
evaporation section 141 and the condensation sections 143,
respectively. The heat pipe 14 is flattened, to have a flat bottom
wall that contacts the bottom plate 11 and a flat top wall that
contacts the top plate 12.
[0017] In assembly, the bottom plate 11, the top plate 12, the
frame 13 and the heat pipe 14 are soldered together to form the
base 10. The heat pipe 14 is enclosed by the bottom plate 11, top
plate 12 and the frame 13. The fin assembly 30 is mounted on the
top plate 12 of the base 10. The fasteners 50 are arranged on the
base 10, and extend through the through holes 110, 120, 130 of the
bottom plate 11, the top plate 12 and the frame 13. Since the frame
13 has high mechanical strength, the edge portions of the bottom
plate 11 and the top plate 12 are supported and protected by the
frame 13, and the base 10 likewise has good mechanical strength and
performance In use of the heat dissipation device 100, the bottom
plate 11 of the base 10 absorbs heat from the electronic component
to which the bottom plate 11 of the base 10 is attached, and then
quickly transfers the heat to the top plate 12 via the heat pipe 14
and the frame 13. The heat is absorbed by the fin assembly 30 and
subsequently dissipated to ambient air.
[0018] Referring to FIG. 6, a heat dissipation device 200 in
accordance with a second embodiment of the disclosure is shown.
Differently from the heat dissipation device 100 of the first
embodiment, the bottom plate 11, the top plate 12 and the frame 13
of the heat dissipation device 200 together form a hermetical
chamber to contain working fluid 60 therein. The working fluid 60
resides between lateral outer walls of the heat pipe 14 and inner
walls of the frame 13, to enhance the heat dissipation capability
of the heat dissipation device 200.
[0019] It is to be understood, however, that even though numerous
characteristics and advantages of certain embodiments have been set
forth in the foregoing description, together with details of the
structures and functions of the embodiments, the disclosure is
illustrative only, and changes may be made in detail, especially in
matters of shape, size, and arrangement of parts within the
principles of the disclosure to the full extent indicated by the
broad general meaning of the terms in which the appended claims are
expressed.
* * * * *