U.S. patent application number 13/106938 was filed with the patent office on 2012-05-03 for heat dissipating apparatus with vortex generator.
This patent application is currently assigned to ENERMAX TECHNOLOGY CORPORATION. Invention is credited to Jer-Sheng HWANG, Sheam-Chyun Lin.
Application Number | 20120103572 13/106938 |
Document ID | / |
Family ID | 43829294 |
Filed Date | 2012-05-03 |
United States Patent
Application |
20120103572 |
Kind Code |
A1 |
HWANG; Jer-Sheng ; et
al. |
May 3, 2012 |
HEAT DISSIPATING APPARATUS WITH VORTEX GENERATOR
Abstract
A heat dissipating apparatus with a vortex generator includes a
heat conducting base, a heat pipe, and a plurality of heat
dissipating fins. Each heat dissipating fin has a vortex generator
installed thereon and disposed adjacent to a side of the heat pipe.
The vortex generator has two guiding oblique surfaces protruding
from a surface of the heat dissipating fin. The two guiding oblique
surfaces are disposed with an included angle there between. A
through hole is formed at a position opposite to a side of the heat
dissipating fin, such that the vortex generator of each heat
dissipating fin induces a stack effect at corresponding upper and
lower parts of the heat dissipating fin to improve the heat
dissipating efficiency.
Inventors: |
HWANG; Jer-Sheng; (Taoyuan
City, TW) ; Lin; Sheam-Chyun; (Taoyuan City,
TW) |
Assignee: |
ENERMAX TECHNOLOGY
CORPORATION
|
Family ID: |
43829294 |
Appl. No.: |
13/106938 |
Filed: |
May 13, 2011 |
Current U.S.
Class: |
165/104.26 |
Current CPC
Class: |
F28D 15/0275 20130101;
H01L 2924/0002 20130101; H01L 23/467 20130101; H01L 23/427
20130101; H01L 2924/0002 20130101; F28F 1/325 20130101; H01L
2924/00 20130101; H01L 23/3672 20130101 |
Class at
Publication: |
165/104.26 |
International
Class: |
F28D 15/04 20060101
F28D015/04 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 3, 2010 |
TW |
099221252 |
Claims
1. A heat dissipating apparatus with a vortex generator,
comprising: a heat conducting base (1); a heat pipe (2), coupled to
the heat conducting base (1); and a plurality of heat dissipating
fins (3), sequentially penetrated by the heat pipe (2); wherein
each heat dissipating fin (3) has a vortex generator (4) installed
thereon and disposed proximate to a side of the heat pipe (2), the
vortex generator (4) has two guiding oblique surfaces (40), (41)
arranged with an included angle therebetween, and a through hole
(32) is formed at a position opposite to a side of the heat
dissipating fin (3).
2. The heat dissipating apparatus with a vortex generator of claim
1, wherein the heat conducting base (1) is substantially a
plate.
3. The heat dissipating apparatus with a vortex generator of claim
1, wherein each of the heat dissipating fins (3) has a
corresponding penetrating hole (30) for allowing the heat pipe (2)
to pass through.
4. The heat dissipating apparatus with a vortex generator of claim
3, wherein each penetrating hole (30) has a circular flange (31)
protruding from the periphery of the penetrating hole (30) for
keeping a close contact with the heat pipe (2).
5. The heat dissipating apparatus with a vortex generator of claim
1, wherein there is a plurality of heat pipes (2), and each heat
pipe (2) has a vortex generator (4) installed on its one side.
6. The heat dissipating apparatus with a vortex generator of claim
1, wherein the two guiding oblique surfaces (40), (41) of each
vortex generator (4) have top edges (400), (410) ascendingly
protruding from the two guiding oblique surfaces (40), (41)
respectively, the top edges (400), (410) of the two guiding oblique
surfaces (40), (41) extend downwardly to form included angle lines
(L1) respectively that are intersected with each other.
7. The heat dissipating apparatus with a vortex generator of claim
6, wherein the included angle formed by intersecting the two
included angle lines (L1) is equal to 60.degree..
8. The heat dissipating apparatus with a vortex generator of claim
1, wherein the two guiding oblique surfaces (40), (41) of each
vortex generator (4) have an aspect ratio of 2:1.
9. The heat dissipating apparatus with a vortex generator of claim
1, wherein each heat dissipating fin (3) includes a plurality of
auxiliary vortex generators (5) arranged transversally on the heat
dissipating fin (3).
10. The heat dissipating apparatus with a vortex generator of claim
9, wherein each auxiliary vortex generator (5) has two guiding
oblique surfaces (50) protruding from a surface of the heat
dissipating fin (3), the two guiding oblique surfaces (50) protrude
in a tapered form, a through hole (51) is formed at a corresponding
position penetrating through the heat dissipating fin (3).
11. The heat dissipating apparatus with a vortex generator of claim
10, wherein the two guiding oblique surfaces (50) of each auxiliary
vortex generator (5) have an included angle of 30.degree..
12. The heat dissipating apparatus with a vortex generator of claim
10, wherein the two guiding oblique surfaces (50) of each auxiliary
vortex generator (5) have an aspect ratio of 2:1.
13. The heat dissipating apparatus with a vortex generator of claim
10, wherein the through hole (51) of each auxiliary vortex
generator (5) is oriented upwardly and obliquely.
14. The heat dissipating apparatus with a vortex generator of claim
9, wherein the auxiliary vortex generators (5) are provided in
pairs.
15. The heat dissipating apparatus with a vortex generator of claim
9, wherein the two guiding oblique surfaces (50) of the auxiliary
vortex generator (5) protrude to be intersected to form a ridge
(L2), the ridges (L2) of adjacent paired auxiliary vortex
generators (5) form an included angle of 60.degree..
16. The heat dissipating apparatus with a vortex generator of claim
1, wherein each heat dissipating fin (3) further includes a
ventilation hole (33) formed at a position proximate to each vortex
generators (4), and a tapered circular enclosed portion (34)
protrudes upwardly from the periphery of the ventilation hole
(33).
17. The heat dissipating apparatus with a vortex generator of claim
16, wherein the circular enclosed portion (34) is disposed between
the two guiding oblique surfaces (40), (41).
Description
FIELD OF THE INVENTION
[0001] The present invention relates to a heat dissipating
apparatus, in particular to a heat dissipating apparatus capable of
generating vortices by a vortex generator and providing a stack
effect.
BACKGROUND OF THE INVENTION
[0002] In recent years, vortex generator is considered as one of
the passive thermal conductivity enhancement technologies, and it
combines small protrusions such as embossments, stamps and punches
with a main thermal exchange surface such as the surface of a heat
dissipating fin by a manufacturing method, thereby preventing
possible separations occurred at the boundary and reducing
frictions. In addition to the advantage of having a better thermal
conductivity enhancement of the heat dissipating fin, the vortex
generator also has a smaller pressure drop.
[0003] In the past, vortex generators applied to heat dissipating
fins generally use vortex energy to facilitate an exchange of heat
with air. However, the effect is still not good enough, because the
produced vortices only flow in a direction based on the airflow
direction of a fan. If no airflow is driven by the fan or a
stagnancy is caused by too much accumulated heat, the heat exchange
effect of the conventional vortex generators will be so small that
the heat dissipating efficiency cannot be enhanced.
[0004] In view of the aforementioned shortcomings of the prior art,
the present Inventor proposes a novel and reasonable structure
based on years of experience in the related industry and extensive
researches.
SUMMARY OF THE INVENTION
[0005] Therefore, it is a primary objective of the present
invention to provide a heat dissipating apparatus with a vortex
generator. Each heat dissipating fin is provided with the vortex
generators, so that the heat dissipating apparatus can induce a
stack effect by means of the vortex generators on and below each
heat dissipating fin. In this way, the heat accumulated between the
respective dissipating fins can be dissipated to achieve the heat
dissipating effect automatically.
[0006] To achieve the foregoing objective, the present invention
provides a heat dissipating apparatus with a vortex generator,
which comprises: a heat conducting base, at least one heat pipe,
and a plurality of heat dissipating fins, wherein the heat pipe is
coupled to the heat conducting base and sequentially penetrating
the heat dissipating fins, each heat dissipating fin includes a
vortex generator installed thereon and disposed adjacent to a side
of the heat pipe, each vortex generator has two guiding oblique
surfaces erected from a surface of the heat dissipating fin, the
two guiding oblique surfaces are arranged with an included angle
therebetween, a through hole is formed at a position opposite to a
side of the heat dissipating fin.
[0007] In comparison with prior art, the present invention has
advantages as follows. Since the vortex generators protrude from
each heat dissipating fin, the total area for heat dissipation will
be increased. Further, since external cold air flowing through the
adjacent two heat dissipating fins is disturbed by the protruding
vortex generators, it takes more time for the external cold air to
pass through the adjacent two heat dissipating fins, so that the
time for heat exchange is extended and thus the heat transfer is
improved greatly.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] FIG. 1 is a perspective view of the present invention;
[0009] FIG. 2 is a perspective view of a heat dissipating fin in
accordance with a preferred embodiment of the present
invention;
[0010] FIG. 3 is a planar partial view of the heat dissipating fin
of the present invention;
[0011] FIG. 4 is a cross-sectional view taken along the line 4-4 in
FIG. 3;
[0012] FIG. 5 is a cross-sectional view taken along the line 5-5 in
FIG. 3;
[0013] FIG. 6 is a top view of a using status of the present
invention;
[0014] FIG. 7 is a cross-sectional view taken along the line 7-7 in
FIG. 6;
[0015] FIG. 8 is a cross-sectional view taken along the line 8-8 in
FIG. 6;
[0016] FIG. 9 is a perspective view of the heat dissipating fin in
accordance with another preferred embodiment of the present
invention; and
[0017] FIG. 10 is a cross-sectional view of the heat dissipating
fin in accordance with another preferred embodiment of the present
invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0018] The technical characteristics and contents of the present
invention will become apparent with the following detailed
description and related drawings. The drawings are provided for the
purpose of illustrating the present invention only, but not
intended for limiting the scope of the invention.
[0019] With reference to FIG. 1 for a perspective view of the
present invention, the present invention provides a heat
dissipating apparatus with a vortex generator, which comprises: a
heat conducting base 1, at least one heat pipe 2, and a plurality
of heat dissipating fins 3.
[0020] The heat conducting base 1 is made of a material with good
thermal conductivity such as aluminum and copper and substantially
in form of a plate adhered to a heat-generating electronic
component (not shown in the figure) such as a CPU of a computer.
The heat pipe 2 is coupled to the heat conducting base 1 and
sequentially penetrates through the heat dissipating fins 3, such
that the heat conducting base 1 can absorb the heat generated by
the heat-generating electronic component and conduct the heat to
each heat dissipating fin 3 quickly. More specifically, each heat
dissipating fin 3 has a corresponding penetrating hole 30 formed
thereon and a circular flange 31 protrudes from the periphery of
each penetrating hole 30. The heat pipe 2 passes through the
penetrating hole 30 of each heat dissipating fin 3 and closely
contacts each circular flange 31. In this preferred embodiment of
the invention, there is a plurality of heat pipes 2.
[0021] With reference to FIGS. 2 and 3, the present invention
comprises at least one vortex generator 4 installed on each heat
dissipating fin 3 and disposed proximate to a backwind side of the
heat pipe 2. In other words, a vortex generator 4 is installed at a
side of the backwind side of each heat pipe 2, such that after an
external airflow (such as the airflow of a fan) flows to a windward
side of the heat pipe 2, the airflow will pass through the vortex
generator 4 and produce a spiral vortex and drive the airflow to
flow towards the backwind side of the heat pipe 2, thereby
dissipating the hot air at the backwind side of the heat pipe 2.
Each vortex generator 4 has two guiding oblique surfaces 40, 41
erected from a surface of the heat dissipating fin 3, and the two
guiding oblique surfaces 40, 41 have top edges 400, 410 ascendingly
protruding from the two guiding oblique surfaces 40, 41. A lower
position is aligned towards an adjacent heat pipe 2. The top edges
400, 410 of the two guiding oblique surfaces 40, 41 extend towards
the lower position to form included angle lines L1. The included
angle lines L1 of the two guiding oblique surfaces 40, 41 extend to
be intersected to form an included angle. A through hole 32 is
formed to penetrate through a side opposite to the heat dissipating
fin 3.
[0022] With reference to FIG. 3 for a more detailed description, an
included angle .theta. produced by the intersection of the included
angle lines L1 is preferably equal to 60.degree., but the present
invention is not limited to such angle only. In FIG. 4, the ratio
of the length 11 and the maximum height h1 (or height) of the two
guiding oblique surfaces 40, 41 is preferably equal to 2:1.
[0023] In FIGS. 3 and 5, each heat dissipating fin 3 of the present
invention has a plurality of auxiliary vortex generators 5 arranged
transversally, and each auxiliary vortex generator 5 has two
guiding oblique surfaces 50 protruding from a surface of the heat
dissipating fin 3. The two guiding oblique surfaces 50 protrude in
a tapered form. A through hole 51 is formed to penetrate through a
position opposite to the heat dissipating fin 3, and the through
hole 51 is oriented upwardly and obliquely. More specifically, in
FIG. 3, the two guiding oblique surfaces 50 of the auxiliary vortex
generator 5 preferably have an included angle .theta.2 of
30.degree., but the present invention is not limited to such angle
only. The ratio of the length 12 and the width w of the two guiding
oblique surfaces 50 is preferably equal to 2:1.
[0024] With the aforementioned assembly, the heat dissipating
apparatus with a vortex generator of the present invention can be
achieved.
[0025] In FIG. 6, a fan 6 is further provided on one side of each
heat dissipating fin 3 of the heat dissipating apparatus, thereby
assisting the heat dissipation from each heat dissipating fin 3.
After the airflow produced by the fan 6 passes through the windward
side of the heat pipe 2, a portion of the airflow will flow along
the external guiding oblique surfaces 40, 41 of the two vortex
generators 4, and another portion of the airflow will enter the two
vortex generators 4 to accelerate the dissipation of the heat
accumulated at the backwind side of the heat pipe 2. In FIG. 7,
since each vortex generator 4 has a through hole 32 penetrating
through the heat dissipating fin 3, after the heat dissipating fins
3 are stacked up, each through hole 32 forms a passage that allows
the hot airflow to flow and rise. As a result, the hot air that
cannot be driven away by the wind produced by the fan 6 can rise
and escape naturally. Thus, a stack effect is induced to achieve
the heat dissipation.
[0026] Each auxiliary vortex generator 5 as shown in FIGS. 6 and 8
can assist accelerating the dissipation of the remaining heat
between the heat dissipating fins 3, so that the accumulated hot
airflow can rise vertically and escape from the through hole 51 to
induce a better stack effect.
[0027] With reference to FIG. 9 for a perspective view of a heat
dissipating fin in accordance with another preferred embodiment of
the present invention, the auxiliary vortex generators 5 are
provided in pairs. The two guiding oblique surfaces 50 of each
auxiliary vortex generator 5 protrude to be intersected to form a
ridge L2. The included angle .theta.2 formed by the ridges L2 of a
pair of adjacent auxiliary vortex generators 5 is preferably equal
to 60.degree., but the present invention is not limited to such
angle only. In FIG. 10, a ventilation hole 33 is formed at a
position next to each vortex generator 4. A tapered circular
enclosed portion 34 is formed to protrude upwardly from the
periphery of the ventilation hole 33. In this preferred embodiment
of the present invention, the circular enclosed portion 34 is
disposed between the two guiding oblique surfaces 40, 41. After the
heat dissipating fins 3 are stacked up, each circular enclosed
portion 34 allows hot air to pass from the bottom through the
ventilation hole 33 and rise effectively to achieve a more
significant stack effect.
[0028] To sum up the above, the present invention improves over the
prior art and complies with the patent application requirements,
and thus is duly filed for patent application.
[0029] While the invention has been described by means of specific
embodiments, numerous modifications and variations could be made
thereto by those skilled in the art without departing from the
scope and spirit of the invention set forth in the claims.
* * * * *