U.S. patent application number 12/549386 was filed with the patent office on 2010-12-09 for heat dissipation device.
This patent application is currently assigned to FU ZHUN PRECISION INDUSTRY (SHEN ZHEN) CO., LTD.. Invention is credited to CHUN-CHI CHEN, GEN-PING DENG, ZHI-SHENG LIAN.
Application Number | 20100307728 12/549386 |
Document ID | / |
Family ID | 43264690 |
Filed Date | 2010-12-09 |
United States Patent
Application |
20100307728 |
Kind Code |
A1 |
LIAN; ZHI-SHENG ; et
al. |
December 9, 2010 |
HEAT DISSIPATION DEVICE
Abstract
A heat dissipation device for removing heat from heat-generating
components includes a fin unit. The fin unit includes a plurality
of fins stacked together. Each fin is wave-shaped in profile and
comprises a plurality of wave crests and wave troughs alternately
arranged with each other. The wave crests of one of the fins
respectively engage the wave troughs of a neighboring upper one of
the fins. The wave troughs of the one of the fins are separated
from and located below the corresponding wave crests of the upper
one of the fins.
Inventors: |
LIAN; ZHI-SHENG; (Shenzhen
City, CN) ; DENG; GEN-PING; (Shenzhen City, CN)
; CHEN; CHUN-CHI; (Tu-Cheng, TW) |
Correspondence
Address: |
Altis Law Group, Inc.;ATTN: Steven Reiss
288 SOUTH MAYO AVENUE
CITY OF INDUSTRY
CA
91789
US
|
Assignee: |
FU ZHUN PRECISION INDUSTRY (SHEN
ZHEN) CO., LTD.
Shenzhen City
CN
FOXCONN TECHNOLOGY CO., LTD.
Tu-Cheng
TW
|
Family ID: |
43264690 |
Appl. No.: |
12/549386 |
Filed: |
August 28, 2009 |
Current U.S.
Class: |
165/181 |
Current CPC
Class: |
H01L 2924/0002 20130101;
H01L 23/427 20130101; H01L 23/3672 20130101; H01L 23/4006 20130101;
H01L 2924/00 20130101; H01L 2924/0002 20130101; H01L 23/467
20130101 |
Class at
Publication: |
165/181 |
International
Class: |
F28F 7/00 20060101
F28F007/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 4, 2009 |
CN |
200910302934.X |
Claims
1. A heat dissipation device adapted for removing heat from a
heat-generating component, comprising: a fin unit comprising a
plurality of fins stacked together, each fin being wave-shaped in
profile and comprising a plurality of wave crests and wave troughs
alternately arranged with each other; wherein the wave crests of
one of the fins respectively engage the wave troughs of a
neighboring upper one of the fins, and the wave troughs of the one
of the fins are separated from and located below the wave crests of
the neighboring upper one of the fins.
2. The heat dissipation device as claimed in claim 1, wherein a
plurality of air passages are defined between the wave troughs of
the one of the fins and the wave crests of the neighboring upper
one of the fins.
3. The heat dissipation device as claimed in claim 2, wherein the
fins are rectangular wave-shaped in profile, the air passages each
being rectangular in cross section.
4. The heat dissipation device as claimed in claim 3, wherein top
surfaces of the wave crests of the one of the fins and bottom
surfaces of the wave troughs of the neighboring upper one of the
fins have the same rectangular configuration and the same size and
are fitly coupled with each other.
5. The heat dissipation device as claimed in claim 1, wherein the
fin unit comprises a plurality of first fins and a plurality of
second fins, the first fins and the second fins being alternately
arranged with each other, each first fin comprising a plural first
crest parts, a plural first trough parts and a plural first
connecting parts interconnecting the first crest and trough parts,
each second fin comprising a plural second crest parts, a plural
second trough parts and a plural second connecting parts
interconnecting the second crest and trough parts.
6. The heat dissipation device as claimed in claim 5, wherein the
first trough parts of one of the first fins respectively engage the
crest parts of a lower neighboring second fin, while the first
crest parts of the one of the first fins are respectively separated
from and located over the second trough parts of the lower
neighboring second fin.
7. The heat dissipation device as claimed in claim 6, wherein a
plurality of air paths are respectively defined between the
separated first crest parts and the second trough parts.
8. The heat dissipation device as claimed in claim 6, wherein a
plurality of air paths are respectively defined between the second
crest parts of the lower neighboring second fin and the first
trough parts of one of the first fins immediately below the lower
neighboring second fin.
9. The heat dissipation device as claimed in claim 6, wherein each
first fin has the same configuration with each second fin, the
first fins and the second fins are arranged oppositely in a
vertical direction.
10. The heat dissipation device as claimed in claim 1, wherein each
fin comprises a main body and two engaging parts at two opposite
ends of the main body, the alternating crests and troughs being
formed on the main body.
11. The heat dissipation device as claimed in claim 10, further
comprising a conducting plate above which the fin unit is located
and a plurality of heat pipes, the fins of the fin unit being
parallel to the conducting plate, the heat pipes comprising a
plural evaporating sections embedded in a top surface of the
conducting plate and a plural condensing sections extending
upwardly and perpendicularly through the engaging parts of the fins
from opposite ends of the evaporating sections.
12. The heat dissipation device as claimed in claim 11, wherein the
fins are divided into a plurality of pairs, the engaging parts of
each pair of the fins at the same end of the main bodies protruding
away from each other and defining a plurality of receiving holes
therein receiving the condensing sections of the heat pipes.
13. The heat dissipation device as claimed in claim 13, wherein the
engaging parts at the same end of the main bodies are parallel to
each other and spaced from each other with a constant distance in
the fin unit, an annular collar extending perpendicularly from an
inner edge of each receiving hole of the engaging part and being
intimately attached around a corresponding condensing sections of a
corresponding heat pipe.
14. The heat dissipation device as claimed in claim 11, further
comprising a heat dissipating member sandwiched between a bottom of
the fin unit and the top surface of the conducting plate, the heat
dissipating member comprising a plurality of vertical sheets
perpendicularly arranged on the conducting plate and a plurality of
connecting flanges interconnecting top edges and bottom edges of
every two neighboring vertical sheets.
15. The heat dissipation device as claimed in claim 14, wherein the
connecting flanges at the top edges of the vertically sheets are
attached the bottom of the fin unit, while the connecting flanges
at the bottom edges of the vertical sheets are coupled to the top
surface of conducting plate and simultaneously contact tops of the
evaporating sections of the heat pipes.
16. The heat dissipation device as claimed in claim 14, further
comprising a fan fixed to rear sides of the fin unit and the heat
dissipating members by two fan holders.
Description
BACKGROUND
[0001] 1. Technical Field
[0002] The present disclosure relates generally to a heat
dissipation device and, more particularly, to a heat dissipation
device comprising a plurality of individual fins assembled together
for removing heat from a heat-generating electronic component to
ambient environment.
[0003] 2. Description of Related Art
[0004] Heat dissipation devices are usually used to remove heat
from heat-generating electronic components, such as central
processing units (CPUs), light emitting diodes (LEDS) and power
transistors, etc., to keep the components in stable operation.
[0005] Conventionally, the heat dissipation device comprises a
solid base, a plurality of fins horizontally arranged on the base,
a plurality of heat pipes connecting the fins and the base together
and a fan mounted to one side of the fins. The base contacts the
heat-generating electronic components to absorb heat generated by
the heat-generating electronic components. The heat pipes comprise
evaporating sections embedded in the base and condensing sections
extending perpendicularly and upwardly through the fins.
Conventionally, the fins are spaced from each other individually
and secured by being soldered to the condensing sections of the
heat pipes. However, contacting areas between the fins and the heat
pipes are so narrow that connective integrity thereof is too weak
to securely assemble the fins together in use. As a result, the
fins are in high risk of suffering disengagement from the heat
pipes, thereby being forced into a sympathetic vibration and
producing noise in response to high-frequency vibration from the
running fan.
[0006] What is needed is a heat dissipation device having a
plurality of individual fins assembled together to obtain a fin
unit with a rather firm structure.
BRIEF DESCRIPTION OF THE DRAWINGS
[0007] 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.
[0008] FIG. 1 is an assembled view of a heat dissipation device in
accordance with an embodiment of the present disclosure.
[0009] FIG. 2 is an exploded view of the heat dissipation device of
FIG. 1.
[0010] FIG. 3 is an elevation view of the heat dissipation device
FIG. 1, with a fan thereof being removed away for clarity.
DETAILED DESCRIPTION
[0011] FIGS. 1-3 illustrate a heat dissipation device in accordance
with an embodiment of the present disclosure. The heat dissipation
device is provided for removing heat from a heat-generating
component such as a CPU. The heat dissipation device comprises a
base 10, a fin unit 20 located over the base 10, a plurality of
heat pipes 30 thermally connecting the fin unit 20 and the base 10
together, a heat dissipating member 40 located between the fin unit
20 and the base 10, a fan 50 and two fan holders 60 securing the
fan 50 to rear sides of the fin unit 20 and the heat dissipating
member 40.
[0012] The base 10 comprises a rectangular conducting plate 12 and
four fixing legs 14 extending diagonally from four corners of the
conducting plate 12. The conducting plate 12 is made of material
with a good heat conductivity such as copper and aluminum and
defines a plurality of elongated receiving grooves 120 in a top
surface thereof for receiving portions of the heat pipes 30. The
receiving grooves 120 are spaced from each other and parallel to
two opposite sides of the conducting plate 12. Four fixtures 100
respectively extend through distal ends of the fixing legs 14 and
fixed in the fixing legs 14 for mounting the heat dissipation
device onto the heat-generating component.
[0013] The fin unit 20 comprises a plurality of fins 22 stacked
vertically together. Each fin 22 is bent into a wave-shaped
configuration and comprises a plurality of wave crests and wave
troughs alternately arranged with each other. In every neighboring
two fins 22, the wave crests of a lower one of the two fins 22
respectively engage the wave troughs of an upper one of the two
fins 22, while the wave crests of the upper one are separated from
and located over the corresponding wave troughs of the lower one,
respectively, whereby a plurality of air passages are respectively
defined between the corresponding wave crests of the upper one and
the corresponding wave troughs of the lower one of the two
neighboring fins 22. The fins 22 are rectangular wave-shaped in
profile; thus, the air passages each are rectangular in cross
section.
[0014] The fins 22 are divided into a plurality of pairs which are
vertically stacked together. Each pair of fins 22 consists of a
first fin 22a and a second fin 22b engaging a bottom of the first
fin 22a. Accordingly, the first fins 22a and the second fins 22b
are alternately arranged when the pairs of the fins 22 are stacked
together. The first fin 22a and second fin 22b of each pair of the
fins 22 have the same configuration, but are arranged oppositely in
the vertical direction. Each first fin 22a comprises a main body
220a and two engaging parts 222 at two opposite ends of the main
body 220a. Each main body 220a of the first fin 22a is bent into a
wave-shaped configuration and comprises a plurality of first crest
parts 221a, a plurality of first trough parts 223a and a plurality
of first connecting parts 222a interconnecting the first crest and
trough parts 221a, 223a, respectively. The first crest and trough
parts 221a, 223a are parallel, flatted plates and alternately
arranged along a traverse direction of the first fin 22a. The first
connecting parts 222a are perpendicular to the first crest and
trough parts 221a, 223a and respectively connected to adjacent side
edges of neighboring ones of the first crest and trough parts 221a,
223a.
[0015] Similar to the first fins 22a, each second fin 22b comprises
a main body 220b and two engaging parts 222 at two opposite ends of
the main body 220b. Each main body 220b of the second fins 22b is
bent into a wave-shaped configuration and comprises a plurality of
second crest parts 221b, a plurality of second trough parts 223b
and a plurality of second connecting parts 222b interconnecting the
second crest and trough parts 221b, 223b. The second crest and
trough parts 221b, 223b are parallel flatted plates and alternately
arranged. The second connecting parts 222b are perpendicular to the
second crest and trough parts 221b, 223b and respectively connected
to adjacent side edges of neighboring ones of the second crest and
trough parts 221b, 223b. The two engaging parts 222 of each pair of
the fins 22 at the same ends of the main bodies 220a, 220b of the
fins 22 protrude away from each other and thus separated from each
other. A plurality of receiving holes 226 spaced from each other
are defined in the corresponding engaging parts 222 for receiving
the heat pipes 30. Each of the first and second fins 22a, 22b has
an annular collar 2260 extending perpendicularly from an edge of
the receiving hole 226 for enlarging a contacting area between the
first and second fins 22a, 22b and the heat pipes 30.
[0016] In assembly of the fin unit 20, the first trough parts 223a
of one of the first fins 22a respectively engage the crest parts
221b of the lower neighboring second fin 22b, while the first crest
parts 221 of the first fin 22a are respectively separated from and
located over the second trough parts 223b of the lower neighboring
second fin 22b. The corresponding wave crest parts 221a, 221b and
wave trough parts 223a, 223b have the same configuration and size
and are fitly coupled with each other. A plurality of air paths 228
are respectively defined between the corresponding separated first
crest parts 221a and second trough parts 223b and between the
corresponding separated first trough parts 223a and second crest
parts 221b of the neighboring first and second fins 22. The two
engaging parts 222 of the fins 22 at opposite ends of the main
bodies 220a, 220b of the fins 22 are parallel to and spaced from
each other with a constant distant.
[0017] Each heat pipe 30 is U-shaped and comprises an evaporating
section 32 and two condensing sections 34 extending upwardly and
perpendicularly from two opposite ends of the evaporating section
32. The evaporating sections 32 of the heat pipes 30 are
respectively received in the receiving grooves 120 of the base 10.
The condensing sections 34 of the heat pipes 30 are respectively
received in the receiving holes 226 of the engaging parts 222 of
the fins 22 and intimately surrounded by the annular collars 2260
of the fins. The condensing sections 34 are parallel to each other
and perpendicular to the fins 22.
[0018] The heat dissipating member 40 is formed by continuously
folding a metallic sheet and comprises a plurality of vertical
sheets 42 and a plurality of connecting flanges 44 interconnecting
top edges or bottom edges of every two neighboring vertical sheets
42. The heat dissipating member 40 is sandwiched between a bottom
of the fin unit 20 and the top surface of the conducting plate 12
of the base 10 and located between the two condensing sections 34
of each heat pipes 30. In detail, the vertical sheets 42 are
perpendicular to the conducting plate 12 and the fins 22. Lower
ones of the connecting flanges 44 at the bottom edges of the
vertical sheets 42 are intimately attached to the top surface of
the conducting plate 12 and engage a top of the evaporating
sections 32 of the heat pipes simultaneously. Upper ones of the
connecting flanges 44 at the top edges of the vertical sheets 42
are attached to the bottom of the fin unit 20. More specific, the
lower ones of the connecting flanges 44 engage bottom surfaces of
the second trough parts 223b of the second fin 22b at the bottom of
the fin unit 20.
[0019] The fan 50 is mounted to rear sides of the fin unit 20 and
the heat dissipating member 40 by the two fan holders 60 for
producing an airflow through the air paths 228 of the fin unit 20
and the heat dissipating member 40.
[0020] In use of the heat dissipation device, heat generated by the
heat-generating component is absorbed by the conducting plate 12 of
the base 10 and then directly conducted to the heat dissipating
member 40 and simultaneously distributed over fin unit 20 via the
heat pipes 30; the heat is finally brought into ambient environment
by the airflow produced by the fan 50 and passing through the fin
unit 20 and the heat dissipating member 40. As the fins 22 are
wave-shaped in profile and the crest parts and trough parts of the
fins 22 are respectively coupled with each other to form a
structure like a honeycomb, the fin unit 20 can have a firm
structure and will not have a sympathetic resonance to produce an
unbearable noise when the fin unit 20 is subject to a
high-frequency vibration from the fan 50 in use. In addition, the
fins 22 are in adequate contact with each other, whereby thermal
resistant between the fins 22 are so low that heat from the heat
pipes 30 can be more evenly and quickly distributed over the fin
unit 20.
[0021] It is believed that the present embodiments and their
advantages 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 disclosure or
sacrificing all of its material advantages, the examples
hereinbefore described merely being preferred or exemplary
embodiments of the disclosure.
* * * * *