U.S. patent application number 09/898052 was filed with the patent office on 2003-01-09 for cpu cooling structure with a ventilation hood.
This patent application is currently assigned to Enlight Corporation. Invention is credited to Chang, Hsiao Liang.
Application Number | 20030007867 09/898052 |
Document ID | / |
Family ID | 27219594 |
Filed Date | 2003-01-09 |
United States Patent
Application |
20030007867 |
Kind Code |
A1 |
Chang, Hsiao Liang |
January 9, 2003 |
CPU cooling structure with a ventilation hood
Abstract
A CPU cooling structure includes a ventilation hood mounted in
between a heat sink and a cooling fan, the ventilation hood having
a conical outer hood shell and a conical inner hood shell
concentrically formed integral with a flat mounting base thereof
and fitted into a conical top receiving space of the heat sink, and
radial partition ribs connected between the conical outer hood
shell and the conical inner hood shell and separating the space
between the conical outer hood shell and the conical inner hood
shell into multiple wind passages adapted to guide currents of air
from the cooling fan downwards toward the center of the heat
sink.
Inventors: |
Chang, Hsiao Liang; (Taoyuan
Hsien, TW) |
Correspondence
Address: |
DOUGHERTY & TROXELL
SUITE 1404
5205 LEESBURG PIKE
FALLS CHURCH
VA
22041
US
|
Assignee: |
Enlight Corporation
|
Family ID: |
27219594 |
Appl. No.: |
09/898052 |
Filed: |
July 5, 2001 |
Current U.S.
Class: |
415/220 ;
257/E23.099 |
Current CPC
Class: |
H01L 2924/0002 20130101;
H01L 2924/00 20130101; H01L 23/467 20130101; H01L 2924/0002
20130101 |
Class at
Publication: |
415/220 |
International
Class: |
F01D 001/00 |
Claims
What the invention claimed is:
1. A CPU cooling structure comprising a heat sink, a cooling fan,
and a ventilation hood, wherein said ventilation hood comprises a
flat mounting base fixedly connected between said heat sink and
said cooling fan by fastening elements, a conical outer hood shell
and a conical inner hood shell concentrically formed integral with
a bottom surface of said flat mounting base and inserted into said
heat sink, and radial partition ribs connected between said conical
outer hood shell and said conical inner hood shell, and wind
passages defined within said conical outer hood shell outside said
conical inner hood shell and separated from one another by said
partition rids and adapted to guide currents of air downwards from
said cooling fan toward said heat sink, said conical inner hood
shell having an inner diameter gradually downwardly reduced from
said flat mounting base toward said heat sink.
2. The CPU cooling structure of claim 1 wherein said heat sink
comprises a plurality of radially extended upright radiation fins,
said upright radiation fins having a respective curved top edge
defining a conical receiving space at the center of a top side of
said heat sink for receiving the conical outer hood shell and
conical inner hood shell of said ventilation hood.
Description
BACKGROUND OF THE INVENTION
[0001] The present invention relates to a CPU cooling structure
and, more particularly, to such a CPU cooling structure, which
comprises a heat sink, a cooling fan mounted on the heat sink at
the top, and a ventilation hood suspended from the bottom side of
the cooling fan and fitted into a conical receiving space in the
heat sink to guide downward currents of air from the cooling fan
toward the center area of the heat sink to quick dissipate heat
energy from the heat sink.
[0002] Conventional heat sinks for CPU commonly have upright
radiation fins disposed at the top for dissipation of heat energy
transmitted from the CPU below. The formation of the upright
radiation fins is complicated, resulting in high cost. When a heat
sink is used, a cooling fan is matched and mounted on the upright
radiation fins of the heat sink. When started, the cooling fan
causes upward currents of air to carry heat energy from the heat
sink. Because cooling currents of air flow from the bottom side
toward the top side, heat energy tends to be accumulated at the
center area of the CPU. Therefore, the cooling efficiency of
conventional heat sinks is low.
SUMMARY OF THE INVENTION
[0003] The present invention has been accomplished to provide a CPU
cooling structure, which eliminates the aforesaid drawbacks.
According to one aspect of the present invention, the CPU cooling
structure comprises a heat sink, a cooling fan, and a ventilation
hood adapted to guide currents of air downwards from the cooling
fan toward the center of the heat sink, enabling heat energy to be
quickly dissipated carried away from the heat sink. According to
another aspect of the present invention, the ventilation hood
comprises a flat mounting base, a conical outer hood shell and a
conical inner hood shell concentrically formed integral with a
bottom surface of the flat mounting base and fitted into a conical
top receiving space of the heat sink, and radial partition ribs
connected between the conical outer hood shell and the conical
inner hood shell and separating the space between the conical outer
hood shell and the conical inner hood shell into multiple wind
passages adapted to guide currents of air from the cooling fan
downwards toward the center of the heat sink.
BRIEF DESCRIPTION OF THE DRAWINGS
[0004] FIG. 1 is an elevational view of a ventilation hood for a
CPU cooling structure according to the present invention.
[0005] FIG. 2 is a bottom plain view of the ventilation hood shown
in FIG. 1.
[0006] FIG. 3 is a top plain view of the ventilation hood shown in
FIG. 1.
[0007] FIG. 4 is an elevational view of the CPU cooling structure
according to the present invention.
[0008] FIG. 5 is an exploded view of the CPU cooling structure
according to the present invention.
[0009] FIG. 6 is a sectional view showing the flowing direction of
currents of air according to the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0010] Referring to FIGS. From 1 through 6, a CPU cooling structure
in accordance with the present invention is generally comprised of
a ventilation hood 1, a cooling fan 2, and a heat sink 3. The
cooling fan 2 is supported above the heat sink 3. The ventilation
hood 1 is fitted into the heat sink 3 and supported between the
heat sink 3 and the cooling fan 2.
[0011] The heat sink 3 comprises a plurality of radially extended
upright radiation fins 31, and a plurality of top mounting holes
32. The upright radiation fins 31 have a respective curved top
edge, defining a conical receiving space at the center of the top
side of the heat sink 3. The ventilation hood 1 comprises a flat
mounting base 11, a conical outer hood shell 12 and a conical inner
hood shell 13 concentrically formed integral with the bottom
surface of the flat mounting base 11 and fitted into the conical
receiving space defined by the curved top edge of each of the
upright radiation fins 31, and radial partition ribs 14 connected
between the conical outer hood shell 12 and the conical inner hood
shell 13 and separating the holding space between the conical outer
hood shell 12 and the conical inner hood shell 13 into separated
wind passages 15. The conical inner hood shell 13 has an inner
diameter gradually downwardly reduced from the flat mounting base
11. The radial partition ribs 14 also reinforce the structural
strength of the ventilation hood 1. The flat mounting base 11
comprises a plurality of mounting holes 111 disposed in the four
corners thereof and respectively connected between the respective
mounting holes 21 of the cooling fan 2 and the respective mounting
holes 32 of the heat sink 3 by fastening elements, for example,
screws 4.
[0012] During the operation of the cooling fan 2, currents of air
flow downwards through the wind passages 15 toward the center area
of the heat sink 3, and then flow out of the heat sink 3 radially
through the gaps in between the upright radiation fins 31 of the
heat sink 3 to carry heat energy away from the heat sink 3
efficiently. Because the outer hood shell 12 and inner hood shell
13 have a conical shape, the ventilation hood 1 effectively
prevents reverse flow of air.
[0013] A prototype of CPU cooling structure has been constructed
with the features of FIGS. 1.about.6. The CPU cooling structure
functions smoothly to provide all of the features discussed
earlier.
[0014] Although a particular embodiment of the invention has been
described in detail for purposes of illustration, various
modifications and enhancements may be made without departing from
the spirit and scope of the invention. Accordingly, the invention
is not to be limited except as by the appended claims.
* * * * *