U.S. patent application number 13/040244 was filed with the patent office on 2011-09-01 for heat sink.
Invention is credited to Shyh-Ming Chen.
Application Number | 20110209854 13/040244 |
Document ID | / |
Family ID | 44504667 |
Filed Date | 2011-09-01 |
United States Patent
Application |
20110209854 |
Kind Code |
A1 |
Chen; Shyh-Ming |
September 1, 2011 |
Heat Sink
Abstract
The heat sink includes a fin set and a heat pipe. The fin set is
composed of a plurality of fins and has an exposed area formed on
one side thereof. The heat pipe penetrates through the fin set and
the exposed area. A portion of the heat pipe is exposed and
flattened in the exposed area. The exposed and flattened portion is
used for connecting a heat generating device as a thermal junction
surface.
Inventors: |
Chen; Shyh-Ming; (New Taipei
City, TW) |
Family ID: |
44504667 |
Appl. No.: |
13/040244 |
Filed: |
March 3, 2011 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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11492660 |
Jul 26, 2006 |
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13040244 |
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Current U.S.
Class: |
165/104.26 |
Current CPC
Class: |
H01L 23/3672 20130101;
H01L 2924/0002 20130101; H01L 23/427 20130101; F28D 15/0266
20130101; F28F 1/32 20130101; H01L 2924/0002 20130101; H01L 23/467
20130101; H01L 2924/00 20130101; H01L 21/4882 20130101; F28D
15/0275 20130101 |
Class at
Publication: |
165/104.26 |
International
Class: |
F28D 15/04 20060101
F28D015/04 |
Claims
1. A heat sink comprising: a fin set composed of a plurality of
fins, having an exposed area formed on one side thereof; and at
least one heat pipe, penetrating through the fin set and the
exposed area, wherein a portion of the at least one heat pipe is
exposed and flattened in the exposed area for directly attaching an
electronic component to be mounted.
2. The heat sink of claim 1, wherein the at least one heat pipe is
two or more in number, and the flattened portions of the heat pipes
are coplanar.
3. The heat sink of claim 1, wherein the fins are of two types, the
first type fins are separately provided with circular holes for
being passed through by the at least one heat pipe, the second type
fins are separately provided with semicircular holes for
accommodating the at least one heat pipe, and the exposed portion
of the at least one heat pipe is formed by the second type
fins.
4. The heat sink of claim 3, wherein the second type fins are
sandwiched between two groups of the first type fins.
5. The heat pipe of claim 3, wherein each of the circular holes and
the semicircular holes is provided with a circular surrounding wall
and a semicircular wall, respectively.
6. The heat sink of claim 1, wherein the exposed area is dented to
form a recess in the fin set.
7. The heat sink of claim 1, wherein the exposed area is protrudent
from the fin set.
8. The heat sink of claim 1, wherein the exposed area occupies a
whole side of the fin set.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation-in-part of U.S. patent
application Ser. No. 11/492,660, filed Jul. 26, 2006.
BACKGROUND OF THE INVENTION
[0002] 1. Technical Field
[0003] The invention relates to heat sinks, particularly to heat
sinks for electronic components.
[0004] 2. Related Art
[0005] FIG. 1 shows a typical heat sink for an electronic
component. This heat sink 1 includes a heat pipe 11, a seat 13 and
a fin set 12. The heat generated by the electronic component 2 is
transferred to the fin set 12 via the seat 13 and heat pipe 11. In
further detail, the seat 13 is penetrated by the heat pipe 13 and
the heat pipe 13 is not in direct contact with the electronic
component 2. The heat transferred by the heat pipe 11 must be
conducted through the seat 13. Thus the heat transfer efficiency is
not good enough.
[0006] FIG. 2 shows another typical heat sink. The seat 14 of the
heat sink is provided with grooves 15 and slots 16 orthogonal
thereto. The grooves 15 and slots 16 accommodate the heat pipes 17
and fins 18, respectively. Similarly, this heat sink also uses a
seat to be a medium between heat pipes and a heat generating
device. There is the same problem as the heat sink shown in FIG.
1.
SUMMARY OF THE INVENTION
[0007] An object of the invention is to provide an improved heat
sink, which makes a heat pipe be in direct contact with a heat
generating device. Thus the heat from the device may be directly
conducted to the heat pipe and the heat transfer efficiency can be
increased.
[0008] To accomplish the above object, the heat sink of the
invention includes a fin set and a heat pipe. The fin set is
composed of a plurality of fins and has an exposed area formed on
one side thereof. The heat pipe penetrates through the fin set and
the exposed area. A portion of the heat pipe is exposed and
flattened in the exposed area. The exposed and flattened portion is
used for connecting a heat generating device as a thermal junction
surface.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] FIG. 1 shows a conventional heat sink;
[0010] FIG. 2 shows another conventional heat sink;
[0011] FIG. 3 is an exploded view of the first embodiment of the
invention;
[0012] FIG. 4 is a schematic view of the invention and an
electronic component;
[0013] FIG. 5 is a side plan view of FIG. 4;
[0014] FIG. 6 is a side plan view of the second embodiment of the
invention; and
[0015] FIG. 7 is a side plan view of the third embodiment of the
invention.
DETAILED DESCRIPTION OF THE INVENTION
[0016] Please refer to FIGS. 3 and 4. The heat sink of the
invention includes a fin set 3 and at least one heat pipe 4.
[0017] The fin set 3 is composed of a plurality of fins. These fins
are of two types: the first type fins 31 and the second type fins
32. All of the fins 31, 32 are spaced combined by spacers 33, 34.
The second type fins 32 are smaller than the first type fins 31 in
size and a group of the second type fins 32 are sandwiched by two
groups of the first type fins 31. Therefore, an exposed area 30 may
be formed on one side of the fin set 3.
[0018] The first type fins 31 are provided with at least one
circular hole 311 for being penetrated by the heat pipe 4. The
second type fins 32 are provided with at least one semicircular
hole 321 for being penetrated by the heat pipe 4. The semicircular
hole 321 is formed by the shortened fin size. Thus the exposed area
30 is formed. Preferably, the circular hole 311 or semicircular
hole 321 may be provided with a surrounding wall 312, 322 for
increasing thermo-conductivity between the heat pipe 4 and the fin
set 3.
[0019] FIGS. 4 and 5 show the heat sink of the invention and an
electronic component 5 to be mounted thereby. As can be seen in
FIG. 4, the exposed area 30 exposes a portion of the heat pipe 4.
And the portion of the heat pipe 4, which is exposed, is flattened
to be a flat thermojunction plane 40. Furthermore, if a plurality
of heat pipes 4 are disposed, then the flattened portions of the
heat pipes 4 are coplanar. The exposed area 30 is sized to fit the
electronic component 5 to be mounted, i.e. the exposed area 30 is
slightly larger than the electronic component 5 in size. Therefore,
the heat sink can be directly mounted on the electronic component 5
by attaching the exposed portion of the thermo-junction plane 40
onto the electronic component 5. The heat generated by the
electronic component 5 can be directly conducted to the heat pipe 4
without any other intermediates.
[0020] Please refer to FIG. 6, which shows the second embodiment of
the invention. The second embodiment differs from the first
embodiment by protruding the exposed area 30'. As shown, the
exposed portion of the heat pipe 4' is bent outwards so that the
flat thermojunction plane 40' slightly protrudes from the fin set
3'.
[0021] Please refer to FIG. 7, which shows the third embodiment of
the invention. The third embodiment differs from the first
embodiment by extending length of the flattened portion of the heat
pipe 4''. That is, the flattened portion of the heat pipe 4''
extends towards two ends of the exposed area 30''. As shown, all
the fins 31'', 32'' do not protrude from the flat thermo-junction
plane 40'' so that the flat thermo-junction plane 40'' is coplanar
to one side of the fin set 3''.
[0022] Such alterations, modifications, and improvements are
intended to be part of this disclosure, and are intended to be
within the spirit and the scope of the present invention.
Accordingly, the foregoing description is by way of example only
and is not intended to be limiting. The present invention is
limited only as defined in the following claims and the equivalents
thereto.
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