U.S. patent application number 12/512341 was filed with the patent office on 2010-11-11 for heat-dissipating fin assembly with heat-conducting structure.
Invention is credited to Chih-Hung Cheng, Kuo-Len LIN, Kuan-Da Pan.
Application Number | 20100282444 12/512341 |
Document ID | / |
Family ID | 49626683 |
Filed Date | 2010-11-11 |
United States Patent
Application |
20100282444 |
Kind Code |
A1 |
LIN; Kuo-Len ; et
al. |
November 11, 2010 |
HEAT-DISSIPATING FIN ASSEMBLY WITH HEAT-CONDUCTING STRUCTURE
Abstract
The present invention relates to a heat-dissipating fin capable
of increasing surface turbulence, which includes a first
heat-dissipating fin and a second heat-dissipating fin. A first
surface of the first heat-dissipating fin is provided with a
plurality of first protrusions arranged at intervals. The second
heat-dissipating fin has a second surface toward the first surface.
The second surface is also provided with a plurality of second
protrusions arranged at intervals. The second protrusions are
arranged to correspond to the first protrusions. The second
heat-dissipating fin is overlapped with the first heat-dissipating
fin. With the arrangement of the first protrusions and the second
protrusions, the heat-dissipating area of the first
heat-dissipating fin and the second heat-dissipating fin can be
increased so as to increase the surface turbulence. Thus, the
heat-exchange efficiency can be enhanced.
Inventors: |
LIN; Kuo-Len; (Wugu
Township, TW) ; Cheng; Chih-Hung; (Wugu Township,
TW) ; Pan; Kuan-Da; (Taipei City, TW) |
Correspondence
Address: |
HDLS Patent & Trademark Services
P.O. BOX 220746
CHANTILLY
VA
20153-0746
US
|
Family ID: |
49626683 |
Appl. No.: |
12/512341 |
Filed: |
July 30, 2009 |
Current U.S.
Class: |
165/104.26 ;
165/104.33; 165/121; 165/185 |
Current CPC
Class: |
H01L 23/3672 20130101;
H01L 23/427 20130101; F28D 15/0275 20130101; F28F 1/325 20130101;
H01L 23/467 20130101; H01L 2924/0002 20130101; H01L 2924/0002
20130101; H01L 2924/00 20130101 |
Class at
Publication: |
165/104.26 ;
165/104.33; 165/121; 165/185 |
International
Class: |
F28D 15/04 20060101
F28D015/04; F28F 7/00 20060101 F28F007/00 |
Foreign Application Data
Date |
Code |
Application Number |
May 5, 2009 |
TW |
098207615 |
Claims
1. A heat-dissipating fin assembly, comprising: a first
heat-dissipating fin having a first surface, the first surface
being provided with a plurality of first protrusions arranged at
intervals; a second heat-dissipating fin overlapped with the first
heat-dissipating fin and having a second surface toward the first
surface, the second surface being provided with a plurality of
second protrusions arranged at intervals, the second protrusions
being arranged to correspond to the first protrusions.
2. The heat-dissipating fin assembly according to claim 1, wherein
the first heat-dissipating fin is provided with a through-hole for
allowing a heat pipe to penetrate therein.
3. The heat-dissipating fin assembly according to claim 2, wherein
the first heat-dissipating fin is provided with first flange at a
periphery of the through-hole.
4. The heat-dissipating fin assembly according to claim 2, wherein
the first heat-dissipating fin is provided with a plurality of
other first protrusions, the first protrusions and the other first
protrusions are provided on both sides of the through-hole
respectively.
5. The heat-dissipating fin assembly according to claim 1, wherein
each of two opposite sides of the first heat-dissipating fin is
bent toward the same direction to form a first bending piece,
thereby forming a gap when the first heat-dissipating fin is
overlapped with the second heat-dissipating fin.
6. The heat-dissipating fin assembly according to claim 5, wherein
the height of the first bending piece is larger than that of the
first protrusion.
7. The heat-dissipating fin assembly according to claim 5, wherein
an another side of the first heat-dissipating fin that is
perpendicular to the first bending piece is provided with two first
air-guiding pieces, and the two first air-guiding pieces are
inclined reversely with respect to the first surface.
8. The heat-dissipating fin assembly according to claim 1, wherein
an another surface of the first heat-dissipating fin opposite to
the first surface is provided with a plurality of first
protrusions, and the first protrusions on the another surface are
staggered with respect to the first protrusions on the first
surface.
9. The heat-dissipating fin assembly according to claim 1, wherein
the second heat-dissipating fin is provided with a through-hole for
allowing a heat pipe to penetrate therein.
10. The heat-dissipating fin assembly according to claim 9, wherein
the second heat-dissipating fin is provided with a second flange at
the periphery of the through-hole to increase the contact area
between the second heat-dissipating fin and the heat pipe.
11. The heat-dissipating fin assembly according to claim 10,
wherein the second heat-dissipating fin is provided with a
plurality of other second protrusions, the second protrusions and
the other second protrusions are provided on both sides of the
through-hole respectively.
12. The heat-dissipating fin assembly according to claim 1, wherein
two opposite sides of the second heat-dissipating fin are bent
toward the same side to form a second bending piece, thereby
forming a gap when the second heat-dissipating fin is overlapped
with the first heat-dissipating fin.
13. The heat-dissipating fin assembly according to claim 12,
wherein the height of the second bending piece is larger than that
of the second protrusion.
14. The heat-dissipating fin assembly according to claim 12,
wherein the other side of the second heat-dissipating fin that is
perpendicular to the second bending piece is provided with two
second air-guiding pieces, the two air-guiding pieces are inclined
reversely with respect to the second surface.
15. The heat-dissipating fin assembly according to claim 1, wherein
the other surface of the second heat-dissipating fin opposite to
the second surface is also provided with a plurality of other
second protrusions, the second protrusions on the other surface are
staggered with respect to the second protrusions on the second
surface.
16. The heat-dissipating fin assembly according to claim 1, wherein
each of the first protrusion and the second protrusion is a rib,
the first protrusions and the second protrusions are arranged at
intervals and parallel to each other obliquely, the second
protrusions are inclined in a direction opposite to that of the
first protrusions.
17. The heat-dissipating fin assembly according to claim 1, wherein
each of the first protrusion and the second protrusion is a semi
sphere.
18. The heat-dissipating fin assembly according to claim 1, wherein
the first protrusion and the second protrusion are brought into
contact with each other.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a heat-dissipating fin
assembly, and in particular to a heat-dissipating fin assembly
having surface processing.
[0003] 2. Description of Prior Art
[0004] Generally speaking, a heat sink is attached to an electronic
element that generates a large amount of heat, thereby dissipating
the heat generated by the electronic element. The heat sink may be
a heat-dissipating fin assembly and a fan, whereby the heat
generated by the electronic element can be conducted to the
heat-dissipating fin assembly. Then, the airflow generated by the
heat-dissipating fan takes away the heat of the heat-dissipating
fin assembly by means of forced airflow, thereby reducing the
temperature of the electronic element.
[0005] With the highly-developed semiconductor technology, computer
hardware is developed to be operated in high speed or frequency in
order to improve its efficiency. As a result, the power consumed by
the computer hardware also increases accordingly. The heat
generated by present electronic elements is much larger than that
generated by traditional electronic elements. In order to improve
the heat-dissipating efficiency, Taiwan Patent Publication No.
M295287 discloses a plurality of air-guiding portions provided on
one side of the heat-dissipating fin. The air-guiding portion is
constituted of a plurality of cusps formed by a pressing process.
With this arrangement, the airflow can be stayed on the
heat-dissipating fin for more time and the heat-dissipating area of
the heat-dissipating fin can be increased. In this way, the heat
can be taken away from the heat-dissipating fin.
[0006] However, in the above structure, in order not to block the
forward movement of the airflow, the air-guiding portion is
constituted of a plurality of cusps, so that the surface turbulence
and the heat-dissipating area can be only increased to a limited
extent. Thus, it is an important issue to provide a
heat-dissipating fin assembly that generates more turbulence and
has a larger heat-dissipating area so as to increase the
heat-exchange efficiency.
SUMMARY OF THE INVENTION
[0007] The present invention is to provide a heat-dissipating fin
assembly with heat-conducting structure, whereby the surface
turbulence and the heat-dissipating area of the heat-dissipating
fin can be increased so as to enhance the heat-exchange
efficiency.
[0008] The present invention provides a heat-dissipating fin
assembly with heat-conducting structure, whose one side is provided
with an air-guiding piece for guiding airflow into channels among
the heat-dissipating fins.
[0009] The present invention includes a first heat-dissipating fin
and a second heat-dissipating fin. The first heat-dissipating fin
has a first surface. The first surface is provided with a plurality
of first protrusions arranged at intervals. The second
heat-dissipating fin is overlapped with the first heat-dissipating
fin and has a second surface toward the first surface. The second
surface is provided with a plurality of second protrusions arranged
at intervals. The second protrusions are arranged to correspond to
the first protrusions.
[0010] In comparison with prior art, since the first
heat-dissipating fin and the second heat-dissipating fin are
provided with a plurality of corresponding first protrusions and
second protrusions respectively, the first protrusions and the
second protrusions that are arranged at intervals and correspond to
each other can increase the surface turbulent between the first
heat-dissipating fin and the second heat-dissipating fin. Thus, the
forward movement of airflow will not be affected while the
heat-dissipating area there between can be increased. Therefore,
the heat-exchange efficiency can be enhanced.
BRIEF DESCRIPTION OF THE DRAWINGS
[0011] FIG. 1 is a perspective view showing the external appearance
of the first heat-dissipating fin of the present invention;
[0012] FIG. 2 is an assembled perspective view showing the first
and second heat-dissipating fins of the present invention;
[0013] FIG. 3 is an assembled top view showing the first and second
heat-dissipating fins of the present invention;
[0014] FIG. 4 is a partially cross-sectional view taken along the
line 4-4 in FIG. 3;
[0015] FIG. 5 is a schematic view (I) showing the operating state
of the heat-dissipating fin of the present invention;
[0016] FIG. 6 is a schematic view (II) showing the operating state
of the heat-dissipating fin of the present invention;
[0017] FIG. 7 is an assembled top view showing the first and second
heat-dissipating fins according to the second embodiment of the
present invention; and
[0018] FIG. 8 is a partially assembled cross-sectional view showing
the first and second heat-dissipating fins according to the second
embodiment of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
[0019] The characteristics and technical contents of the present
invention will be described with reference to the accompanying
drawings. However, the drawings are illustrative only but not used
to limit the present invention.
[0020] Please refer to FIGS. 1 and 2, which are perspective views
showing the external appearance of the heat-dissipating fin
assembly of the present invention. The heat-dissipating fin
assembly of the present invention includes a first heat-dissipating
fin 10 and a second heat-dissipating fin 20 that are overlapped
with each other.
[0021] The first heat-dissipating fin 10 has a first surface 11.
The first surface 11 is provided with a plurality of first
protrusions 12. Each of the first protrusion 12 is a rib. The first
protrusions 12 are arranged at intervals and parallel to one
another obliquely. Each of the two opposite sides 101, 102 of the
first heat-dissipating fin 10 is perpendicularly bent toward the
same direction to form a first bending piece 13, so that a gap can
be formed between the first heat-dissipating fin 10 and the second
heat-dissipating fin 20 by supporting of the first bending pieces
13 when they are overlapped with each other. The height of the
first bending piece 13 is larger than that of the first protrusion
12. The other side of the first heat-dissipating fin 10 that is
perpendicular to the first bending piece 13 is provided with two
first air-guiding pieces 14, 14a. The two first air-guiding pieces
14, 14a form an opposite inclined angle with respect to the first
surface 11 respectively. However, those skilled in this art may
appreciate that the number and arrangement of the air-guiding
pieces can be changed according to practical demands.
Alternatively, there may be only one air-guiding piece.
[0022] Furthermore, the first heat-dissipating piece 10 can be
provided with a plurality of through-holes 100 for allowing at
least one heat pipe 30 (FIG. 5) to penetrate therein. The first
heat-dissipating fin 10 is provided with a flange 15 at the
periphery of the through-hole 100 so as to increase the contact
area between the first heat-dissipating fin 10 and the heat pipe
30. Further, in order to increase the turbulence and the
heat-dissipating area, the first heat-dissipating fin 10 is
provided with a plurality of other first protrusions 12a. The first
protrusions 12, 12a are located on both sides of the through-hole
100 and are oriented in opposite directions. Since the
heat-dissipating fins are overlapped with each other, the other
surface 11' of the first heat-dissipating fin 10 opposite to the
first surface 11 is provided with a plurality of second protrusions
12'. The second protrusions 12' on the other surface 11' are
staggered with respect to the second protrusions 12 on the first
surface 11. Since the heat-dissipating fins are made of materials
of good heat-dissipating property (such as aluminum), the ribs on
its surface can be formed by means of a pressing process. Thus, the
other surface of the rib forms a trough. As a result, the second
protrusions 12' form a plurality of troughs on the first surface
11.
[0023] The second heat-dissipating fins 20 are overlapped with the
first heat-dissipating fins 10. The arrangement of the second
heat-dissipating fin 20 is substantially the same as that of the
second heat-dissipating fin 10 and has a second surface 21 toward
the first surface 11. The second surface 21 is provided with a
plurality of second protrusions 22, 22a. The arrangement of the
second protrusions 22, 22a correspond to that of the first
protrusions 12, 12a. The second protrusions 22, 22a are ribs
arranged at intervals and parallel to one another obliquely. The
opposite two sides 201, 202 of the second heat-dissipating fin 20
are bent toward the same side to form a second bending piece 23,
while the other side 203 is provided with two first air-guiding
pieces 24, 24a. The second heat-dissipating fin 20 is provided with
a through-hole 200 and a second flange 25 to correspond to the
first heat-dissipating fin 10. The difference between the second
heat-dissipating fin 20 and the first heat-dissipating fin 10 lies
in that: the second protrusions 22, 22a are arranged obliquely in a
direction opposite to that of the first protrusions 12, 12a. That
is to say, the second protrusions 22, 22a are staggered with
respect to the first protrusions 12, 12a. Similarly, the second
heat-dissipating fin 20 is also provided with a plurality of second
protrusions 22' on the other surface 21' opposite to the second
surface 21.
[0024] Please refer to FIGS. 3 and 4, which are a top view and a
cross-sectional view showing the overlapping of the first
heat-dissipating fin 10 and the second heat-dissipating fin 20. It
can be seen that, when overlapped, the first protrusions 12 and the
second protrusions 22 are staggered to form a plurality of
contacting points A. The second bending piece 23 is overlapped on
the first bending piece 13, so that an airflow channel is formed
there between.
[0025] Please refer to FIGS. 5 and 6, which show the operating
state of the heat-conducting structure of the heat-dissipating fin
of the present invention. In the following, the elements of the
first heat-dissipating fin 10 and the second heat-dissipating fin
20 are described as an example. In use, the first heat-dissipating
fins 10 and the second heat-dissipating fins 20 are overlapped
orderly to form a heat-dissipating fin assembly 1. Further, a
plurality of heat pipes 30 penetrates into the heat-dissipating fin
assembly 1. One side of the heat-dissipating fin assembly 1 is
provided with an axial fan 40. The airflow generated by the axial
fan 40 is guided by the two second air-guiding pieces 14, 14a into
the heat-dissipating fin assembly 1. The airflow entering the
airflow channels passes through the staggered first protrusions 12
and the second protrusions 22 to generate turbulence. Since the
first protrusions 12 and the second protrusions 22 are brought into
point contact with each other, the forward movement of the airflow
will not be affected. The generation of the turbulence can extend
the time for the airflow to stay in the channels, thereby taking
away more heat of the heat-dissipating fins to enhance the
heat-exchange efficiency. Further, the first protrusions 12 and the
second protrusions 22 increase the heat-dissipating area of the
first heat-dissipating fins 10 and the second heat-dissipating fins
20, thereby facilitating the turbulence to take away more heat and
accelerating the heat dissipation.
[0026] Please refer to FIGS. 7 and 8, which are a top view and a
cross-sectional view showing the overlapping of the first
heat-dissipating fin and the second heat-dissipating fin according
to the second embodiment of the present invention. The second
embodiment is substantially identical to the first embodiment, and
it has a first heat-dissipating fin 50 and a second
heat-dissipating fin 60. A first surface 51 of the first
heat-dissipating fin 50 is provided with a first protrusion 51. A
first surface 61 of the second heat-dissipating fin 60 is provided
with a second protrusion 61. The only difference lies in that each
of the first protrusion 51 and the second protrusion 61 is a semi
sphere. It can be seen that, when overlapped, the first protrusions
52 and the second protrusions 62 are brought into contact with each
other to form a plurality of contact points B.
[0027] Although the present invention has been described with
reference to the foregoing preferred embodiments, it will be
understood that the invention is not limited to the details
thereof. Various equivalent variations and modifications can still
occur to those skilled in this art in view of the teachings of the
present invention. Thus, all such variations and equivalent
modifications are also embraced within the scope of the invention
as defined in the appended claims.
* * * * *