U.S. patent application number 12/232697 was filed with the patent office on 2009-04-23 for turbo-guiding type cooling apparatus.
Invention is credited to Liang-Ho Cheng.
Application Number | 20090101315 12/232697 |
Document ID | / |
Family ID | 40269229 |
Filed Date | 2009-04-23 |
United States Patent
Application |
20090101315 |
Kind Code |
A1 |
Cheng; Liang-Ho |
April 23, 2009 |
Turbo-guiding type cooling apparatus
Abstract
A turbo-guiding type cooling apparatus includes a reverse fixed
blade unit interposed between the wind exit surface of the fan and
the heat sink. The rotation direction of the reverse fixed blade
unit is opposite to that of the fan. A receiving chamber is formed
under the shaft of the reverse fixed blade unit, and the receiving
chamber has at least one-third height of the reverse fixed blade
unit. A separation portion extending into the receiving chamber is
formed at the center of the top of at least one part of the heat
sink. The reverse fixed blade unit includes a reduction cover
inward tapered at the periphery of the wind outlet thereof. The
height (h1) of the periphery of the reduction cover is the same to
or greater than the height (h2) of the periphery of the wind outlet
of the reverse fixed blade unit, thereby forming a ring-shaped
enclosing type. Therefore, the wind will be smoothly concentrated
and the flow direction will be changed. Meanwhile, each of the
airflows will be separated by the separation portion and delivered
to the heat source of the heat sink.
Inventors: |
Cheng; Liang-Ho; (Jhongli
City, TW) |
Correspondence
Address: |
ROSENBERG, KLEIN & LEE
3458 ELLICOTT CENTER DRIVE-SUITE 101
ELLICOTT CITY
MD
21043
US
|
Family ID: |
40269229 |
Appl. No.: |
12/232697 |
Filed: |
September 23, 2008 |
Current U.S.
Class: |
165/104.31 |
Current CPC
Class: |
H01L 2924/00 20130101;
H01L 2924/0002 20130101; H01L 23/467 20130101; H01L 2924/0002
20130101 |
Class at
Publication: |
165/104.31 |
International
Class: |
F28D 15/00 20060101
F28D015/00 |
Foreign Application Data
Date |
Code |
Application Number |
Oct 17, 2007 |
TW |
096138787 |
Aug 8, 2008 |
TW |
097130190 |
Claims
1. A turbo-guiding type cooling apparatus, comprising: a) a heat
sink consisting of a plurality of fins; and b) a fan disposed at
the top of the heat sink, wherein a reverse fixed blade unit is
interposed between the wind exit surface of the fan and the heat
sink, and the rotation direction of the reverse fixed blade unit is
opposite to that of the fan, and a receiving chamber is formed
under the shaft of the reverse fixed blade unit, and the receiving
chamber has at least one-third height of the reverse fixed blade
unit; wherein a separation portion extending into the receiving
chamber is formed at the center of the top of at least one part of
the heat sink; and wherein the reverse fixed blade unit includes a
reduction cover inward tapered at the periphery of the wind outlet
thereof, and the height (h1) of the periphery of the reduction
cover is the same to or greater than the height (h2) of the
periphery of the wind outlet of the reverse fixed blade unit,
thereby forming a ring-shaped enclosing type; therefore, the wind
will be smoothly concentrated and the flow direction will be
changed; meanwhile, each of the air flows will be separated by the
separation portion and delivered to the heat source of the heat
sink.
2. The turbo-guiding type cooling apparatus as recited in claim 1
wherein the fin of the heat sink is selected from a group
consisting of horizontal and vertical type fin.
3. The turbo-guiding type cooling apparatus as recited in claim 1
wherein the separation portion at the top of the heat sink includes
one or several projecting fins.
4. The turbo-guiding type cooling apparatus as recited in claim 1
wherein the reverse fixed blade unit is disposed within an
independent mounting frame, and the reduction cover is integrally
formed at the bottom rim of the mounting frame in such a way that
the mounting frame serves as a connection base for the fan and the
heat sink.
5. The turbo-guiding type cooling apparatus as recited in claim 1
wherein the reverse fixed blade unit and the fins of the heat sink
are integrally formed.
6. The turbo-guiding type cooling apparatus as recited in claim 5
wherein a blade socket is mounted at the periphery of the blade,
and the reduction cover is formed at the bottom rim of the blade
socket.
7. A turbo-guiding type cooling apparatus, comprising: a) a heat
sink consisting of a plurality of fins; and b) a fan disposed at
the top of the heat sink, wherein a reverse fixed blade unit is
interposed between the wind exit surface of the fan and the heat
sink, and the rotation direction of the reverse fixed blade unit is
opposite to that of the fan, and a receiving chamber is formed
under the shaft of the reverse fixed blade unit, and the receiving
chamber has at least one-third height of the reverse fixed blade
unit, and a mounting frame is disposed on the reverse fixed blade
unit for mounting the fan thereon; wherein the heat sink consists
of a plurality of vertical fins arranged in a radiating manner, and
the heat sink includes a ring groove and a middle hole, and a
projecting separation portion extending into the receiving chamber
is formed at the ring groove facing the middle hole; and wherein a
reduction cover is interposed between the heat sink and the reverse
fixed blade unit, and the reduction cover has an inward tapered
portion while the center thereof is hollow to create a wind outlet,
and the tapered portion lies at the periphery of the ring groove of
the vertical fins, and the height (h1) of the periphery of the
cover is the same to or greater than the height (h2) of the
periphery of the wind outlet of the reverse fixed blade unit,
thereby forming a ring-shaped enclosing type such that the wind
will be smoothly concentrated and the flow direction will be
changed; meanwhile, each of the air flows will be separated by the
separation portion and delivered to the heat source of the heat
sink.
8. The turbo-guiding type cooling apparatus as recited in claim 7
wherein the tapered portion of the reduction cover includes an
arched body without recesses and lies at the periphery of the ring
groove of the vertical fins.
9. The turbo-guiding type cooling apparatus as recited in claim 7
wherein the tapered portion the reduction cover includes radial
recesses into which the vertical fins of the heat sink fit.
10. The turbo-guiding type cooling apparatus as recited in claim 7
wherein the mounting frame is provided with a shaft at the center
thereof for fixing the fan in place.
11. The turbo-guiding type cooling apparatus as recited in claim 7
wherein the mounting frame further includes an independent mounting
base at the top thereof for fixing the fan in place.
12. The turbo-guiding type cooling apparatus as recited in claim 7
wherein the heat sink further includes a heat-conducting module at
the bottom of the middle hole thereof.
13. The turbo-guiding type cooling apparatus as recited in claim 7
wherein The heat sink, the reverse fixed blade unit, and the
reduction cover are integrally formed by an integral module that is
made by a plurality of the metal pieces in stamping and bending
process, and fixing elements 81 are employed to combine them in an
integral structure, and the fan is mounted within a mounting base
and then disposed on the heat sink by several screws.
14. A turbo-guiding type cooling apparatus, comprising: a) a heat
sink; and b) a fan disposed at the top of the heat sink, wherein a
reverse fixed blade unit is interposed between the wind exit
surface of the fan and the heat sink, and the rotation direction of
the reverse fixed blade unit is opposite to that of the fan, and a
receiving chamber is formed under the shaft of the reverse fixed
blade unit, and the receiving chamber has at least one-third height
of the reverse fixed blade unit, and s mounting frame is disposed
on the reverse fixed blade unit for mounting the fan thereon;
wherein the heat sink includes a heat-conducting module, and a
projecting separation body extending into the receiving chamber is
formed at the top thereof, and the heat sink is provided with a
plurality of radial recesses; and wherein a reduction cover is
interposed between the heat sink and the reverse fixed blade unit,
and the reduction cover has an inward tapered portion while the
center thereof is hollow to create a wind outlet having a plurality
of straight fins engaging into the radial recesses of the heat
sink, and the height (h1) of the periphery of the cover is the same
to or greater than the height (h2) of the periphery of the wind
outlet of the reverse fixed blade unit, thereby forming a
ring-shaped enclosing type such that the wind will be smoothly
concentrated by the reduction cover and the flow direction will be
changed thereby; meanwhile, each of the air flows will be separated
by the separation portion and delivered to the heat source of the
heat sink.
15. The turbo-guiding type cooling apparatus as recited in claim 14
wherein a straight fin of the reduction cover has a connection
surface in the middle thereof and is fixed by a screw fitting into
a connection hole at the top of the heat sink.
16. The turbo-guiding type cooling apparatus as recited in claim 14
wherein the heat-conducting module includes a conic and arched
periphery.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The invention relates to a turbo-guiding type cooling
apparatus, and more particularly to a structure that includes a
reverse fixed blade unit and a reduction cover between a heat sink
and a fan.
[0003] 2. Description of the Related Art
[0004] As shown in FIGS. 1 and 2, a conventional cooling apparatus
10 applied to CPU or other electronic chips includes a heat sink 11
having a plurality of fins and an axial flow fan 12 disposed at the
top of the heat sink 11. The bottom of the heat sink 11 lies on the
surface of the electronic chip (or heat source 14). After the
operation of the fan 12, the heat energy of the heat source 14 can
be transmitted to all fins of the heat sink 11 by use of the heat
conduction. Meanwhile, the cool air generated by the fan 12 is
delivered to the fins of the heat sink 11 for conducting the heat
exchange. In the way, the heat energy is removed.
[0005] However, the conventional fan 12 belongs to an axial flow
type. All of blades 122 of the fan 12 are extended outward from a
shaft portion 121 at the center thereof. Many components like motor
are received within the shaft portion 121. Therefore, the shaft
portion 121 occupies a considerable space. The area adjacent to the
heat zone 15 under the shaft portion 121 obtains less cooling air
when the fan 12 is operated. In other words, the cooling fins at
the area of the heat zone 15 can hardly achieve the heat removal by
cool air. Moreover, the heat source 14 is aligned to the shaft
portion 121 of the fan 12 when the cooling apparatus 10 is
installed. Therefore, the current of air and the wind pressure
generated by the fan 12 can not be transmitted to the heat zone 15
of the heat sink 11 most adjacent to the heat source 14. Therefore,
the heat-removal efficiency is reduced.
[0006] As shown in FIGS. 3 and 4, another conventional cooling
apparatus 10a includes an inclined and conic wind-guiding ring 13
between a heat sink 11 and a fan 12. The wind-guiding ring 13 is
provided for delivering the current of air generated by the fan 12
to a region covered by the shaft portion 121 at the center of the
fan 12 such that the cooling air can reach the part of the heat
sink 11 most adjacent to the heat source 14. It is expected to
enhance the heat-removal efficiency. This structure is disclosed by
TW M259469.
[0007] It is correct for the above-mentioned cooling apparatus 10a
to deliver the current of air to the center. However, the effect
achieved by the inclined and conic wind-guiding ring 13 can be very
limited since it can only achieve a slight change of
wind-delivering angle. Likewise, the cooling air can hardly reach
the view field (w) under the shaft portion 121, that is, the
position of the heat source 14. Thus, the heat-removal efficiency
can't be considerably enhanced as well, and this requires further
improvement.
[0008] As shown in FIG. 5, a further cooling apparatus 10b includes
heat-removal fins 16 in a vertical arrangement. It is different
from the above-mentioned heat-removal fins 16 in a horizontal
arrangement. No matter if the cooling apparatus is in a horizontal
arrangement or in a vertical arrangement, they all have the
above-mentioned problem with respect to the heat removal.
[0009] The turbo-supercharging principle has been widely applied to
many pneumatic products, such as suction opening of the jet engine,
accelerator for automotive engines, particle vacuum pumps, etc. The
operating principle of these devices lies in that the rotary blades
and the reverse blades fixed at the rim are assembled to be a blade
unit. The high-speed rotary blades delivers current of air to the
reverse blades fixed at the rim such that the airflow pressure can
be rapidly enhanced between the rotary blades and the reverse
blades fixed at the rim. This is the principle of the well-known
turbo-supercharging process.
[0010] Many cooling fans or ventilators are provided with the
turbine device. However, most of them only combine one turbine fan
and the cooling fins or employ a fan blowing to a reverse
eddy-shaped and non-bladeshaped partitions regularly spaced. The
turbo-supercharging structure occupies a greater space and is aimed
to enhance the wind pressure. However, this can cause a power loss
due to return pressure created by these cooling apparatuses.
Consequently, these conventional apparatuses are not
applicable.
SUMMARY OF THE INVENTION
[0011] A primary object of the invention is to provide a
turbo-guiding type cooling apparatus that smoothly delivers the
current of air generated by a fan to a heat sink such that a heat
exchange takes place in a heat region where the current of air
within the heat sink does not reach easily. In other words, the
heat region can be cooled by the injected current of air such that
the heat energy can be smoothly removed for enhancing the
heat-removal efficiency.
[0012] Another object of the invention is to provide a
turbo-guiding type cooling apparatus that ensures an extended
service life of electronic chips and increases their reliability.
Moreover, the heat-removal volume is diminished for saving precious
space. Meanwhile, an unnecessary material waste is avoided. In
addition, it is not necessary to use high-speed fan so that the
noise can be reduced.
[0013] In order to achieve the above-mentioned objects, the
invention has the following features:
[0014] A reverse fixed blade unit is interposed between the wind
exit surface of the fan and the heat sink. The rotation direction
of the reverse fixed blade unit is opposite to that of the fan. A
receiving chamber is formed under the shaft of the reverse fixed
blade unit, and the receiving chamber has at least one-third height
of the reverse fixed blade unit.
[0015] A separation portion extending into the receiving chamber is
formed at the center of the top of at least one part of the heat
sink.
[0016] The reverse fixed blade unit includes a reduction cover
inward tapered at the periphery of the wind outlet thereof. The
height (h1) of the periphery of the reduction cover is the same to
or greater than the height (h2) of the periphery of the wind outlet
of the reverse fixed blade unit, thereby forming a ring-shaped
enclosing type. Therefore, the wind will be smoothly concentrated
and the flow direction will be changed. Meanwhile, each of the
airflows will be separated by the separation portion and delivered
to the heat source of the heat sink.
[0017] Based on the above-mentioned features, the turbo-guiding
type cooling apparatus includes a reverse fixed blade unit and a
reduction cover. A receiving chamber is formed under the shaft of
the reverse fixed blade unit into which the separation portion is
extended. In this way, a concentrated airflow can be delivered to
the front side of a heat region of the cooling fins. The idea of
smooth guiding of the airflow and the structure appearance is
partially similar to the turbo-supercharging principle. The main
feature of the invention lies in "diversion" (flow-guiding). In
other words, the reverse fixed blade unit within the reduction
cover, the flow-guiding chamber under the shaft, and the extending
reduction cover are well employed for conducting the flow-guiding
task. Therefore, it is not necessary for the invention to have a
high rotation speed required by the turbine. Meanwhile, components
such as coupling and gear mechanism are also not required for
pressure rise. This feature is therefore called as "turbo-guiding"
that shows a distinct difference from the conventional
"turbo-supercharging".
[0018] The configuration of the reverse fixed blade unit and the
reduction cover is simple and can achieve the heat-removal effect.
In this way, the whole volume can be so properly reduced that the
dimensions of the entire cooling apparatus won't be increased to
occupy much space. It is therefore beneficial to arrange electronic
components in the computer. The reverse fixed blade unit of the
invention can be disposed within an independent mounting frame as
the need arises. Alternatively, it can be designed to be a
turbo-guiding type fan that is combined with a reduction cover and
a heat-conducting module. In addition, it can be integrally formed
with the fins of the heat sink.
[0019] No matter which of the above-mentioned embodiments is
applied, a concentrated current of air directed to the heat source
can be obtained. Meanwhile, the vibration and the noise generated
by wind pressure can be avoided. Moreover, an optimal value of wind
pressure and wind quantity can be obtained without problem under
the condition of the least power loss, thereby optimizing the
heat-removal efficiency. Thus, the invention can eliminate the
problem of the conventional heat sink and is really an effective
cooling apparatus applicable in the electronic industry.
BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The accomplishment of this and other objects of the
invention will become apparent from the following descriptions and
its accompanying figures of which:
[0021] FIG. 1 is an exploded perspective view of a conventional
horizontal type cooling apparatus;
[0022] FIG. 2 is a cross-sectional view of the conventional
horizontal type cooling apparatus after assembly;
[0023] FIG. 3 is an exploded perspective view of another
conventional horizontal type cooling apparatus;
[0024] FIG. 4 is a cross-sectional view of another conventional
horizontal type cooling apparatus after assembly;
[0025] FIG. 5 is a schematic drawing of a conventional vertical
type cooling apparatus;
[0026] FIG. 6 is an exploded perspective view of a first embodiment
of the invention;
[0027] FIG. 7 is a cross-sectional view of the first embodiment of
the invention;
[0028] FIG. 8 is a perspective view of a second embodiment of the
invention;
[0029] FIG. 9 is a perspective view of a third embodiment of the
invention;
[0030] FIG. 10 is an exploded perspective view of a fourth
embodiment of the invention;
[0031] FIG. 11 is an exploded perspective view of a fifth
embodiment of the invention;
[0032] FIG. 12A is a top view of a vertical type cooling fins in
FIG. 11;
[0033] FIG. 12B is a cross-sectional view taken along the line
12B-12B in FIG. 12A;
[0034] FIG. 13A is a top view of a reduction cover in FIG. 11;
[0035] FIG. 13B is a cross-sectional view taken along the line
13B-13B in FIG. 13A;
[0036] FIG. 14A is a top view of a reverse fixed blade unit 40 in
FIG. 11;
[0037] FIG. 14B is a cross-sectional view taken along the line
14B-14B in FIG. 14A;
[0038] FIG. 14C is a cross-sectional view taken along the line
14C-14C in FIG. 14A;
[0039] FIG. 15A and 15B are cross-sectional views of the embodiment
in FIG. 11;
[0040] FIG. 16 is a perspective view of a sixth embodiment of the
invention;
[0041] FIG. 17 is an exploded cutaway view of the sixth embodiment
of the invention;
[0042] FIG. 18 is a cutaway view of a seventh embodiment of the
invention after assembly;
[0043] FIG. 19 is an exploded perspective view of the seventh
embodiment of the invention;
[0044] FIG. 20 is a perspective view of the seventh embodiment of
the invention after assembly;
[0045] FIG. 21 is an exploded perspective view of an eighth
embodiment of the invention;
[0046] FIG. 22 is an assembly perspective view of partial
components of the eighth embodiment of the invention; and
[0047] FIG. 23 is a cutaway view of the eighth embodiment of the
invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0048] First of all, referring to FIGS. 6 and 7, a turbo-guiding
type cooling apparatus in accordance with the invention includes a
heat sink 20, and a fan 30.
[0049] The heat sink 20 includes a plurality of horizontal type
cooling fins 21. According to the embodiment, the heat sink 20
belongs to a horizontal type heat sink. It should not be restricted
thereto. The configuration of the invention can be also applied to
the vertical type heat sink or heat-conducting module. These will
be described in detail hereinafter. The heat sink 20 is not the
object of the invention so that no further descriptions thereto are
given hereinafter.
[0050] The fan 30 is disposed at the top of the heat sink 20.
According to the invention, the fan 30 is an axial-flow fan so that
the heat exchange takes place by delivering cool air downward to
the heat sink 20.
[0051] The invention features a reverse fixed blade unit 40
interposed between the wind exit surface of the fan 30 and the heat
sink 20. The rotation direction of the reverse fixed blade unit 40
is opposite to that of the fan 30. A receiving chamber 45 is formed
under the shaft of the reverse fixed blade unit 40. The receiving
chamber 45 must have at least one-third height of the reverse fixed
blade unit 40. Two-third height thereof or more than two-third
height thereof is preferred.
[0052] A separation portion 22 extending into the receiving chamber
45 is formed at the center of the top of the heat sink 20.
[0053] The reverse fixed blade unit 40 includes a reduction cover
42 inward tapered at the periphery of the wind outlet thereof. The
height h1 of the periphery of the reduction cover 42 is the same to
or greater than the height h2 of the periphery of the wind outlet
of the reverse fixed blade unit 40, thereby forming a ring-shaped
enclosing type. In this way, the wind will be smoothly concentrated
and the flow direction will be changed. Meanwhile, each of the air
flows will be separated by the separation portion 22 and delivered
to the heat source of the heat sink 20.
[0054] According to the embodiment of the invention, the separation
portion 22 includes projecting fins. There are one or several fins
depending on the requirements.
[0055] In order to gather up the air flow and then to deliver it to
the heat source, the fan 30 is employed to replace the conventional
turbo-supercharging and super high-speed shaft blade. Moreover, the
shape, the number of blades and the gap of the reverse fixed blade
unit 40 must be designed according to the rotation speed of the fan
30 and the blade shape for achieving the flow-guiding effect.
[0056] Based on such the above-mentioned combination, the shaft of
the reverse fixed blade unit 40 serves as wind outlet and is
enclosed by the reduction cover 42 at the ring side. In this way,
the airflow can be smoothly gathered together by means of the eddy
guide. Besides, each of the airflows can be separated by means of
the separation portion 22 extending to the bottom of the shaft of
the reverse fixed blade unit 40. Meanwhile, the airflows are
delivered to the heat source. The object of the invention lies in
the smooth diversion rather than the conventional
turbo-supercharging process for increasing the wind pressure. In
other words, the main effect of the invention is the gathering of
the wind amount. The increase of the wind pressure is not the
object of the invention.
[0057] Based on the above-mentioned means, the invention includes
the following embodiments.
[0058] First of all, referring to FIG. 8, the reverse fixed blade
unit 40 is disposed within an independent mounting frame 43 in such
a way that it serves as a connection base for the fan 30 and the
heat sink 20. In other words, the structure is created by
assembling the above-mentioned three individual components one
after the other.
[0059] As shown in FIG. 9, which illustrates another embodiment of
the reverse fixed blade unit 40, vertical fins 23 of the heat sink
20a are integrally formed with the reverse fixed blade unit 40 so
as to create a turbo-guiding type cooling apparatus 60. Thereafter,
the fan 30 is installed thereon. This embodiment is more suitable
for the vertical type cooling apparatus. Vortex type blades 41 can
be directly formed by bending the upper portion of the vertical
fins 23 counterclockwise or clockwise. A blade socket 44 is mounted
at the periphery of the blades 41. In this way, the reverse fixed
blade unit 40 and the heat sink 20a are integrally combined for
different application requirements.
[0060] Based on the above-mentioned features, a preferred
application is shown in FIGS. 10 through 16. The same components
are marked with the same reference sign. The difference between
FIGS. 10 and 11 lies only in that the tapered portion 421 of the
reduction cover 42a in FIG. 10 is an substantially arched body
without recesses while the tapered portion 421 of the reduction
cover 42a in FIG. 11 includes radial recesses 422. The other parts
are the same. The embodiment of the invention according to FIGS. 11
through 15 includes a heat sink 20a consisting of a plurality of
vertical fins 23 and a fan 30 disposed at the top of the heat sink
20a.
[0061] The invention features a reverse fixed blade unit 40
interposed between the wind exit surface of the fan 30 and the heat
sink 20a. The rotation direction of the reverse fixed blade unit 40
is opposite to that of the fan 30. As shown in FIG. 14C, A
receiving chamber 45 is formed under a shaft 411 of the reverse
fixed blade unit 40. The receiving chamber 45 must have at least
one-third height of the reverse fixed blade unit 40. Moreover, a
mounting frame 43 and a shaft 411 are attached to the reverse fixed
blade unit 40 for installing the fan 30 thereon.
[0062] The heat sink 20a consists of a plurality of vertical fins
23 arranged in a radiating manner. The heat sink 20a includes a
ring groove 231 and a middle hole 232. Meanwhile, a projecting
separation portion 22a extending into the receiving chamber 45 is
formed at the ring groove 231 facing the middle hole 232. According
to the embodiment, the separation portion 22a is an inclined cone
created by the central part of the vertical fins 23.
[0063] A reduction cover 42a is interposed between the heat sink
20a and the reverse fixed blade unit 40. The reduction cover 42a
has an inward tapered portion 421. The center thereof is hollow to
create a wind outlet 424. The tapered portion 421 lies at the
periphery of the ring groove 231 of the vertical fins 23. The
height h1 of the periphery of the cover is the same to or greater
than the height h2 of the periphery of the wind outlet of the
reverse fixed blade unit 40, thereby forming a ring-shaped
enclosing type. In this way, the wind will be smoothly concentrated
and the flow direction will be changed. Meanwhile, each of the air
flows will be separated by the separation portion 22a and delivered
to the heat source of the heat sink 20.
[0064] As shown in FIGS. 11, 14A.about.14C, the mounting frame 43
of the reverse fixed blade unit 40 further includes a shaft 411 at
the center thereof for fixing the fan 30 in place.
[0065] Besides, a ring groove 231 and a middle hole 232 are
illustrated in FIGS. 12A and 12B. Meanwhile, several vertical fins
23 are extended outward to create a screw connection portion
233.
[0066] FIGS. 13A and 13B are a top view and a cutaway view of the
reduction cover 42a in FIG. 11. As shown in FIGS. 15A and 15B, the
heat sink 20a, the reduction cover 42a, the reverse fixed blade
unit 40, and the fan 30 are assembled to create a turbo-guiding
type cooling apparatus 70. The feature of this embodiment is the
same to that of the previous embodiments. Moreover, the special
assembly structure is more concrete. The screw connection portions
233, 423 of the heat sink 20, the reduction cover 42a, and the
mounting frame 43 can be fixed by screws (not shown) or other
elements to complete the assembly. In addition, a heat-conducting
module 24 is formed at the bottom of the middle hole 232 of the
heat sink 20a for enhancing the heat-removal effect.
[0067] As shown in FIG. 10, the reduction cover 42a has a tapered
portion 421 without recesses. The arched body is disposed at the
periphery of the ring groove 231 of the vertical fins 23. As shown
in FIG. 11, radial recesses 422 are present for the insertion of
the tapered portion 421 into the vertical fins 23. These two
embodiments are also formed in a ring-shaped enclosing type.
[0068] As shown in FIGS. 16 and 17, the top of the mounting frame
43 is flat and has no room for mounting the fan 30 in place.
Therefore, an independent mounting base 31 is disposed at the top
of the mounting frame and fitted with a shaft 411 at the center
thereof for mounting the fan 30 in place. Thereafter, the
combination body is fixed on the mounting frame 43. The other
components are the same to that of the previous embodiments so that
no further descriptions thereto are given hereinafter.
[0069] As shown in FIGS. 18 through 20, the heat sink 20a, the
reverse fixed blade unit 40, and the reduction cover 42a are
integrally formed. The features thereof substantially correspond to
that in FIG. 9. The periphery of the blades 41 in FIG. 9 includes a
blade socket 44, and the reduction cover 42 is disposed at the
bottom of the blade socket 44. According to this embodiment, the
vortex type blades 41 of the reverse fixed blade unit 40 are
directly formed at the reduction cover 42a. Meanwhile, the tapered
portion 421 of the reduction cover 42a is also formed in the gaps
between the cooling fins 21. The heat sink 20a, the reverse fixed
blade unit 40, and the reduction cover 42a are integrally formed by
an integral module 80 that is made by a plurality of the metal
pieces in stamping and bending process. Meanwhile, fixing elements
81 are employed to combine them in an integral structure.
Meanwhile, the fan 30 is mounted within a mounting base 31 and then
disposed on the heat sink 20a by several screws 33 extending
through the screw connection portions 311, 233. According to this
embodiment, an integral module 80 is employed for a convenient
assembly of the mounting base 31 of the conventional fan 30.
Therefore, this embodiment is different from the previous
embodiment only in the assembly and processing way. The other
structure and features are the same to that of the other embodiment
so that no further descriptions thereto are given hereinafter.
[0070] FIGS. 21 through 23 illustrate a further embodiment of the
invention. The same components are marked with the same reference
signs. The difference is detailed hereinafter.
[0071] The heat sink is a heat-conducting module 20b. According to
a preferred embodiment, the periphery is formed in a conic and
arched shape. A projecting separation portion 22a extending into
the receiving chamber 45 is disposed at the top of the heat sink
20b. Meanwhile, several radial recesses 25 are formed in the conic
surface of the heat sink 20b.
[0072] As for the reduction cover 42a, the tapered portion 421
thereof does not have recesses. However, several straight fins 425
are provided at the wind outlet 424 for engaging into radial
recesses 25 of the heat sink 20b. According to a preferred
embodiment, the straight fin 425 has a connection surface 426 in
the middle thereof and is fixed by a screw 427 fitting into a
connection hole 26 at the top of the heat sink 20b. Likewise, the
height h1 of the periphery of the reduction cover 42a is the same
to or greater than the height h2 of the periphery of the wind
outlet of the reverse fixed blade unit 40, thereby forming a
ring-shaped enclosing type. The function is the same to that of the
previous embodiments so that no further descriptions thereto are
given hereinafter.
[0073] According to the above-mentioned embodiments, a few common
features are concluded as follows:
[0074] 1. A receiving chamber 45 extending to the bottom over more
than one-third height thereof is formed under the shaft of the
reverse fixed blade unit 40. Preferably, the receiving chamber 45
is extended from the periphery to the center thereof in an inclined
type.
[0075] 2. No matter if the heat sink consists of fins or is formed
by a heat-conducting module, a projecting separation portion 22,
22a extending to the receiving chamber 45 is formed at the center
of the heat sink for separating different airflows.
[0076] 3. The reverse fixed blade unit 40 includes an enclosing
reduction cover 42, 42a at the periphery of the wind outlet
thereof. The height h1 of the periphery of the reduction cover is
the same to or greater than the height h2 of the periphery of the
wind outlet of the reverse fixed blade unit 40 In this way, the
wind will be smoothly delivered to the heat source of the heat sink
20. Moreover, the reduction cover is provided with recesses or
without recesses for an easy connection to the heat sink. Of
course, the reduction cover can be integrally formed with the heat
sink in a stamping process. Furthermore, the fins 425 are provided
for a direct connection with the heat-conducting module 20b.
Therefore, the above-mentioned variations are within the scope of
the invention and can fulfill the requirement of the heat-removal
efficiency.
[0077] Many changes and modifications in the above-described
embodiments of the invention can, of course, be carried out without
departing from the scope thereof. Accordingly, to promote the
progress in science and the useful arts, the invention is disclosed
and is intended to be limited only by the scope of the appended
claims.
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