U.S. patent application number 12/461824 was filed with the patent office on 2009-12-24 for heat radiating component.
This patent application is currently assigned to FUJITSU LIMITED. Invention is credited to Hideyuki Fujikawa.
Application Number | 20090314476 12/461824 |
Document ID | / |
Family ID | 39720913 |
Filed Date | 2009-12-24 |
United States Patent
Application |
20090314476 |
Kind Code |
A1 |
Fujikawa; Hideyuki |
December 24, 2009 |
Heat radiating component
Abstract
The present invention relates to a heat radiating component that
includes plural heat radiating fins which are arranged with spaces
therebetween and radiate heat from the plural heat radiating fins
to air flowing through the spaces between the plural heat radiating
fins. Air inflow ends of the plural heat radiating fins have such
notch shapes in that alternately or cyclically different portions
in an arrangement direction where the plural heat radiating fins
are arranged are notched.
Inventors: |
Fujikawa; Hideyuki;
(Kawasaki, JP) |
Correspondence
Address: |
STAAS & HALSEY LLP
SUITE 700, 1201 NEW YORK AVENUE, N.W.
WASHINGTON
DC
20005
US
|
Assignee: |
FUJITSU LIMITED
Kawasaki
JP
|
Family ID: |
39720913 |
Appl. No.: |
12/461824 |
Filed: |
August 25, 2009 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
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PCT/JP2007/053613 |
Feb 27, 2007 |
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12461824 |
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Current U.S.
Class: |
165/121 |
Current CPC
Class: |
H01L 23/467 20130101;
H01L 2924/0002 20130101; H01L 23/3672 20130101; H01L 2924/00
20130101; H01L 23/4006 20130101; H01L 2924/0002 20130101; H01L
2023/4081 20130101; H01L 23/427 20130101 |
Class at
Publication: |
165/121 |
International
Class: |
F28D 21/00 20060101
F28D021/00 |
Claims
1. A heat radiating component, comprising: a plurality of heat
radiating fins which are arranged with spaces therebetween so that
the heat radiating component radiates heat from the plurality of
heat radiating fins to air flowing through the spaces between the
plurality of heat radiating fins, the heat radiating fins having
such notch shapes that portions that are at least one of
alternately and cyclically different in an arrangement direction of
the plurality of heat radiating fins are notched.
2. The heat radiating component according to claim 1, wherein the
plurality of heat radiating fins further have air outflow ends that
also have the notch shapes.
3. The heat radiating component according to claim 1, wherein when
the ends having the notch shapes of the plurality of heat radiating
fins are viewed in the arrangement direction, a gap is formed
between projected portions of adjacent heat radiation fins of the
plurality of heat radiation fins.
4. The heat radiating component according to claim 1, further
comprising a heat absorbing plate that absorbs heat from a heat
generating component that is an object to be cooled, the plurality
of heat radiating fins being arranged to stand on the heat
absorbing plate.
5. The heat radiating component according to claim 4, further
comprising a heat conduction member that contacts the heat
absorbing plate and penetrates the plurality of heat radiating fins
to conduct heat of the heat absorbing plate to the plurality of
heat radiating fins.
6. The heat radiating component according to claim 1, further
comprising a fan that generates an air flow in the spaces between
the plurality of heat radiating fins.
7. The heat radiating component according to claim 6, wherein the
fan is a fan that blows air into the spaces between the plurality
of heat radiating fins.
8. The heat radiating component according to claim 6, wherein the
fan is a fan that blows air out of the spaces between the plurality
of heat radiating fins.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This is a continuation application of PCT/JP2007/053613,
filed on Feb. 27, 2007.
FIELD
[0002] The embodiments discussed herein are related to a heat
radiating component that includes plural heat radiating fins which
are arranged with spaces therebetween, and radiates heat from the
heat radiating fins to air flowing through the spaces.
BACKGROUND
[0003] As an electronic apparatus has been increasingly advanced
recently, it is provided with a large LSI having a high computing
performance therein. The amount of generated heat has been
increased with the improvement of the computing performance.
Accordingly, a heat radiating component carrying out heat radiation
for a such large LSI also is required to deliver increasingly high
performance of heat radiation. To such heat radiating component is
usually applied a heat radiating structure in which a number of
heat radiating fins arranged with spaces therebetween are provided,
air is flown into the spaces in the heat radiating fins to conduct
heat from the heat radiating fins to the air so that the air with a
raised temperature is exhausted outside the apparatus. Japanese
Laid-open Patent Publications No. H08-88301 and No. H11-103183
describe structures in which shapes and arrangements of the heat
radiating fins are devised to obtain higher heat radiating
performance.
[0004] Here, a major problem with a heat radiating component
provided with a number of heat radiating fins arranged with spaces
therebetween as described above is the following. While an
electronic apparatus mounted with such heat radiating component has
been used for a long time, the heat radiating fins are attached
with dust in air inflow ends thereof so that the air flow is
impaired and the heat radiating performance is deteriorated. As a
result, for example, a heat generating component serving as an
object for heat radiation such as a large LSI is less cooled and
thus has a high temperature, thereby causing the heat radiating
component to malfunction or deteriorate. In the end, the heat
radiating component may be damaged and the electronic apparatus may
stop in operation.
[0005] Here, for reducing dust attaching to the heat radiating
fins, there may be some such ideas that the spaces between the heat
radiating fins are widened, or that the quantity of air may be
decreased. However, such measures are undesirable because such
ideas result in deterioration of heat radiating performance when
the improvement of the heat radiating performance has been
increasingly required as heat radiating quantity of the heat
radiating component has been increased.
SUMMARY
[0006] According to one aspect of the invention, a heat radiating
component includes plural heat radiating fins which are arranged
with spaces therebetween so that the heat radiating component
radiates heat from the plural heat radiating fins to air flowing
through the spaces between the plural heat radiating fins. And the
heat radiating fins have such notch shapes that portions that are
at least one of alternately and cyclically different in an
arrangement direction of the plural heat radiating fins are
notched.
[0007] Because the heat radiating component of the invention
includes the notch shape described above in the air inflow side of
the beat radiating fins, an aperture of air inflow in the air
inflow side edges is substantially widened and dust attaching is
reduced while the heat radiating performance is maintained.
[0008] The object and advantages of the invention will be realized
and attained by means of the elements and combinations particularly
pointed out in the claims.
[0009] It is to be understood that both the foregoing general
description and the following detailed description are exemplary
and explanatory and are not restrictive of the invention, as
claimed.
BRIEF DESCRIPTION OF DRAWINGS
[0010] FIG. 1 illustrates a perspective view of a heat radiating
component as a first embodiment according to the invention;
[0011] FIG. 2 illustrates a top view of the heat radiating
component illustrated in FIG. 1;
[0012] FIG. 3 illustrates a front view of the heat radiating
component illustrated in FIG. 1;
[0013] FIG. 4 illustrates a side view of the heat radiating
component illustrated in FIG. 1;
[0014] FIG. 5 illustrates an enlarged view of a portion indicated
by the circle R1 illustrated in FIG. 1;
[0015] FIG. 6 illustrates an enlarged view of a portion indicated
by the circle R2 illustrated in FIG. 3;
[0016] FIG. 7 illustrates a perspective view of a heat radiating
component as a second embodiment according to the invention;
[0017] FIG. 8 illustrates a side view of the heat radiating
component illustrated in FIG. 7;
[0018] FIG. 9 illustrates an enlarged view of a portion indicated
by the circle R3 illustrated in FIG. 8;
[0019] FIG. 10 illustrates an outline perspective view of a heat
absorbing plate included in the heat radiating component
illustrated in FIG. 7; and
[0020] FIG. 11 is a schematic diagram illustrating a shape of a
heat pipe included in the heat radiating component illustrated in
FIG. 7.
DESCRIPTION OF EMOBODEIMENTS
[0021] Hereafter, embodiments according to the invention will be
explained with reference to the drawings.
[0022] FIG. 1 illustrates a perspective view of a heat radiating
component 10 as a first embodiment according to the invention. FIG.
2 illustrates a top view of the heat radiating component 10
illustrated in FIG. 1. FIG. 3 illustrates a front view of the heat
radiating component illustrated 10 in FIG. 1. FIG. 4 illustrates a
side view of the heat radiating component 10 illustrated in FIG.
1.
[0023] Further, FIG. 5 illustrates an enlarged view of a portion
indicated by the circle R1 illustrated in FIG. 1. FIG. 6
illustrates an enlarged view of a portion indicated by the circle
R2 illustrated in FIG. 3.
[0024] This heat radiating component 10 includes a heat absorbing
plate 11, multiple heat radiating fins 12 arranged with spaces
therebetween. The heat absorbing plate 11 is made of metal having a
high heat conduction efficiency such as copper. The heat absorbing
plate 11 plays a role that a bottom surface of the heat absorbing
plate 11 is attached to a heat generating component (not
illustrated) to absorb heat from the heat generating component, and
a role that the heat absorbing plate 11 holds the multiple heat
radiating fins 12 in a crimped state to conduct to the heat to the
multiple heat radiating fins 12. The multiple heat radiating fins
12 are also formed by a material having a high thermal conduction
efficient such as aluminum or copper. Heat conducted from the heat
generating component to the heat absorbing plate 11 is further
conducted to the heat radiating fins and then to air flowing
through the spaces in the multiple heat radiating fins 12. Air,
which has absorbed heat and is in a high temperature, is exhausted
outside an electronic apparatus and the like in which the heat
generating component and the heat radiating component 10 are
housed.
[0025] Here, in top ends and both side ends of the multiple heat
radiating fins 12 included in the heat radiating component 10,
notch shapes are formed as enlargedly illustrated in FIG. 5. That
is, each one of the heat radiating fins 12 has the notch shape in
which the ends are notched to form projections 12a and depressions
12b repeatedly, and in the example discussed here, the projections
12a and 12b between adjacent heat radiating fins of the plural heat
radiating fins do not overlap each other, and as illustrated in
FIG. 6, the projections 12a are formed in alternately different
positions such that gaps f and gaps g between the projections 12a
and the projections 12b are formed.
[0026] Thus, substantial apertures at the air inflow ends where air
to the spaces in the heat radiating fins 12 flows in and at the air
outflow ends where air from the spaces in the heat radiating fins
12 flows out are wide, and dust attaching to the air inflow ends is
reduced. And simultaneously, the resistance of air flowing the
spaces of the heat radiating fins is also reduced and air flows
more smoothly, contributing to preventing dust attaching, and in
addition, leading to improvement of the heat radiating
performance.
[0027] Incidentally, it is preferable that, in the present example,
the opening gaps f and g between the projections are formed as
illustrated in FIG. 6. However, even though as these gaps f and g
do not exist, for example, the projections are formed alternately
such that the projections partially overlaps each other, the
widening of substantial apertures as a whole of the air inflow ends
and the air outflow ends of the heat radiating fins is ensured.
Therefore, these gaps f and g are not necessarily formed.
[0028] In addition, in the present example, without the air inflow
ends and the air outflow ends being differentiated each other, the
heat radiating fins have the notch shapes in the three sides
excluding the side crimped by the heat absorbing plate 11. However,
in a case where the air inflow ends and the air outflow ends are
known in advance, it is acceptable that only the air outflow ends
have the notch shapes. As dust is attached in the air inflow ends,
dust attaching is decreased, as far as the air inflow ends have the
above described notch shapes.
[0029] Further, in the example explained here, the adjacent fins
are notched in alternately different portions. However, for
example, the notch shapes may be formed in cyclically different
portions, i.e., the notch shapes are repeatedly formed in same
positions every three or four of the heat radiating fins.
[0030] FIG. 7 illustrates a perspective view of a heat radiating
component 20 as a second embodiment according to the invention.
FIG. 8 illustrates a side view of the heat radiating component
illustrated in FIG. 7.
[0031] FIG. 9 illustrates an enlarged view of a portion indicated
by the circle R3 illustrated in FIG. 8.
[0032] Further, FIG. 10 illustrates an outline perspective view of
a heat absorbing plate 21 included in the heat radiating component
20 illustrated in FIG. 7. FIG. 11 is a schematic diagram
illustrating a heat pipe 25 included in the heat radiating
component 20 illustrated in FIG. 7.
[0033] The heat radiating component 20 serving as the second
embodiment is provided with a heat absorbing plate 21 in a bottom
end thereof.
[0034] This heat absorbing plate 21 includes, as illustrated in
FIG. 10, a heat absorbing section 211 to absorb heat from a heat
generating component (not illustrated), and four of arm sections
212 to fix the heat radiating component 20 illustrated in FIG.
7.
[0035] In this embodiment, the heat absorbing section 211 is formed
from copper in order to ensure a good heat absorbing performance.
The arm sections 212 made of aluminum are crimped at its four
corners. The heat absorbing section 211 is formed with two grooves
211a, in which the heat pipe 25 described later (see FIG. 11) is
arranged. In addition, the four arm sections 212 are provided with
mounting openings 212a penetrating vertically through the arm
section 212. As illustrated in FIG. 7, screw parts 22 go through
the mounting openings 212a. Using these screw parts 22, the heat
radiating component 20 is fixed to a casing or the like of an
electronic apparatus in a state where a top face of the heat
generating component is pressed onto a bottom face of the heat
absorbing section 211. Incidentally, spring members 23 are provided
to make it possible to stably mount the heat radiating component 20
to the casing or the like in a state where the bottom face of the
heat radiating component 20 is attached to the heat generating
component.
[0036] In addition, the heat radiating component 20 illustrated in
FIG. 7 and FIG. 8 are arranged with a number of heat radiating fins
24 crimped to the heat absorbing section 211. A top face covered by
a fan 26, and both side faces of these heat radiating fins 24 have
notch shapes as illustrated in FIG. 9. The notch shapes themselves
are equivalent to the notch shapes of the heat radiating fins 21
included in the heat radiating component 10 serving as the first
embodiment. Thus, a redundant explanation will be avoided.
[0037] In addition, the heat radiating component 20 is provided
with the heat pipe 25 having a shape as illustrated in FIG. 11. One
end side of the heat pipe 25 is to be engaged in the groove 21
formed in the heat absorbing section 211 of the heat absorbing
plate 21, and extends from there, then curves to turn and extends
in the arrangement direction of the heat radiating fins 24 to
penetrate the heat radiating fins 24.
[0038] Thanks to the existence of the heat pipe 25, heat absorbed
from the heat generating component by the heat absorbing section
211 is conducted effectively through the heat pipe 25 to the heat
radiating fins 24.
[0039] Further, the heat radiating component 20 illustrated in FIG.
7 and FIG. 8 is provided with the fan 26 in a position where the
heat radiating component 20 covers a top end of the heat radiating
fins 24. The fan 26 blows air toward from the top ends of the heat
radiating fins 24 to the heat radiating fins 24. Air blown into the
spaces of the heat radiating fins 24 from the top ends of the heat
radiating fins 24 by the fan 26 absorbs heat from the heat
radiating fins 24 while going through the spaces of the heat
radiating fins 24, and further, blows to the heat absorbing plate
21 to directly absorb heat also from the heat absorbing plate 21
and then exhausted from the both side ends of the heat radiating
fins 24.
[0040] The top ends of the heat radiating fins 24 also have notch
shapes similar to those formed in the side ends of the heat
radiating fins 24. Thus, dust attaching to the air inflow ends
serving as the top ends of the heat radiating fins 24 is
reduced.
[0041] Incidentally, the fan 26 of the second embodiment is
explained as a fan which blows air toward the heat radiating fins
24. However, this fan 26 may be a fan which blows air in a
direction of suctioning air from the heat radiating fins 24. In
this case, the both side ends of the heat radiating fins 24 become
air inflow ends. The heat radiating fins 24 have the notch shapes
also in both side ends. Thus, also in this case, dust attaching to
the both side ends serving as the air inflow ends is reduced.
[0042] All examples and conditional language recited herein are
intended for pedagogical purposes to aid the reader in
understanding the invention and the concepts contributed by the
inventor to furthering the art, and are to be construed as being
without limitation to such specifically recited examples and
conditions, nor does the organization of such examples in the
specification relate to a showing of the superiority and
inferiority of the invention. Although the embodiments of the
present inventions have been described in detail, it should be
understood that the various changes, substitutions, and alterations
could be made hereto without departing from the spirit and scope of
the invention.
* * * * *