U.S. patent application number 13/423372 was filed with the patent office on 2013-02-07 for heat sink structure.
The applicant listed for this patent is Takeho HSU. Invention is credited to Takeho HSU.
Application Number | 20130032323 13/423372 |
Document ID | / |
Family ID | 47626204 |
Filed Date | 2013-02-07 |
United States Patent
Application |
20130032323 |
Kind Code |
A1 |
HSU; Takeho |
February 7, 2013 |
HEAT SINK STRUCTURE
Abstract
A heat sink structure includes a base and heat dissipating fins,
which are arranged into at least two heat dissipating groups and
integrally formed with the base. Lines connecting apexes of the
heat dissipating fins in the heat dissipating group form a convex
arc shape. In addition, The heat dissipating fins of the
neighboring heat dissipating groups are arranged in the same
pattern, or are arranged at different levels and in a gradually
rising or gradually falling manner. Thus, the heat dissipation
efficiency of the heat sink structure is enhanced.
Inventors: |
HSU; Takeho; (Taipei City,
TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
HSU; Takeho |
Taipei City |
|
TW |
|
|
Family ID: |
47626204 |
Appl. No.: |
13/423372 |
Filed: |
March 19, 2012 |
Current U.S.
Class: |
165/185 |
Current CPC
Class: |
F21Y 2115/10 20160801;
F28F 3/02 20130101; F21V 29/75 20150115 |
Class at
Publication: |
165/185 |
International
Class: |
F28F 7/00 20060101
F28F007/00 |
Foreign Application Data
Date |
Code |
Application Number |
Aug 2, 2011 |
TW |
100214229 |
Claims
1. A heat sink structure, comprising: a base; and at least two heat
dissipating groups formed on the base and integrally formed with
the base, wherein each of the heat dissipating groups comprises a
plurality of heat dissipating fins with end portions corresponding
to one another so that connecting lines connecting the end portions
form a convex arc structure.
2. The heat sink structure according to claim 1, wherein the end
portions of the heat dissipating fins of each of the heat
dissipating groups correspondingly form an arced structure, and the
arced structures of the neighboring heat dissipating groups have
the same height, so that the neighboring arced structures form
continuous arcs with the same pattern.
3. The heat sink structure according to claim 1, wherein the end
portions of the heat dissipating fins of each of the heat
dissipating groups correspondingly form an arced structure, and the
arced structures of the neighboring heat dissipating groups have
different heights, so that the neighboring arced structures form
arced configurations which gradually rise and fall.
4. The heat sink structure according to claim 1, wherein the base
is a metal plate.
5. The heat sink structure according to claim 1, wherein the base
is an upper lamp shell of a light-emitting diode (LED) road
lamp.
6. A heat sink structure, comprising: a base; and at least one heat
dissipating group, which is formed on the base and integrally
formed with the base, and comprises a plurality of heat dissipating
fins, wherein an end portion of each of the heat dissipating fins
is formed with an arced structure with arced sections.
7. The heat sink structure according to claim 6, wherein the arced
structures of the neighboring heat dissipating fins are contour
structures and are staggered, so that an included angle is formed
between a width extending direction of the heat dissipating fin and
a connecting line connecting the arced sections of the neighboring
heat dissipating fins.
8. The heat sink structure according to claim 6, wherein the arced
structure of each of the heat dissipating fins comprises the arced
sections, which are connected together and have different heights,
and the arced structures of the neighboring heat dissipating fins
are staggered, so that an included angle is formed between a width
extending direction of the heat dissipating fin and a connecting
line connecting the arced sections of the neighboring heat
dissipating fins.
9. The heat sink structure according to claim 6, wherein the base
is a metal plate.
10. The heat sink structure according to claim 6, wherein the base
is an upper lamp shell of a light-emitting diode (LED) road lamp.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The invention relates to the technical field of a heat sink,
and more particularly to a heat sink, which may be applied to a
light-emitting diode (LED) road lamp, a solar energy thermoelectric
conversion apparatus or any other apparatus or element requiring
heat dissipating by way of heat transfer.
[0003] 2. Related Art
[0004] A typical opto-electronic apparatus, such as a LED
apparatus, generates a lot of heat in the working process, and the
heat decreases the working efficiency and the lifetime of the
opto-electronic apparatus. Therefore, the opto-electronic apparatus
works in conjunction with a heat sink or a heat dissipating system
for dissipating the heat.
[0005] A frequently seen heat sink mounted on an outdoor apparatus,
such as a LED road or street lamp, has parallel, contour, long and
sheet-like heat dissipating fins for absorbing and dissipating the
heat.
[0006] Because the heat sink is directly exposed to the atmosphere,
the heat sink may contact with the rain, dust or leaves and is not
adapted to the condition with a fan that may increase the heat
dissipating effect.
[0007] In order to enhance the heat dissipating effect, the surface
area of the heat sink has to be enlarged. However, the way of
enlarging the heat dissipating area is to increase the number of
the heat dissipating fins, and this way decreases the gap between
the heat dissipating fins and is disadvantageous to the heat
radiation and convection. Next, the too dense heat dissipating fins
tend to increase the possibility of accumulating the dust or
leaves, so that the heat dissipating effect is deteriorated.
[0008] In addition, when the air flowing direction is the direction
of normal of the heat dissipating fin, the parallel and contour
structures of the heat dissipating fins suppress the heat of the
inner heat dissipating fins from being easily dissipated and cause
the heat accumulation. In addition, the too-dense arranged state
cannot substantially enhance the heat dissipating effect.
SUMMARY OF THE INVENTION
[0009] It is therefore an object of the invention to provide a heat
sink structure capable of generating thermal convection effects
such that the heat on each heat dissipating fin can be rapidly
dissipated into the atmosphere and the heat dissipating effect is
enhanced.
[0010] According to the above-mentioned object and effect, the
invention discloses a heat sink structure including a base and at
least two heat dissipating groups formed on the base and integrally
formed with the base. Each heat dissipating group includes a
plurality of heat dissipating fins, and connecting lines connecting
apexes of the heat dissipating fins form a convex arc shape.
[0011] Further scope of the applicability of the present invention
will become apparent from the detailed description given
hereinafter. However, it should be understood that the detailed
description and specific examples, while indicating preferred
embodiments of the present invention, are given by way of
illustration only, since various changes and modifications within
the spirit and scope of the present invention will become apparent
to those skilled in the art from this detailed description.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The present invention will become more fully understood from
the detailed description given hereinbelow and the accompanying
drawings which are given by way of illustration only, and thus are
not limitative of the present invention.
[0013] FIG. 1 is a pictorial view showing a first embodiment of the
invention.
[0014] FIG. 2 is a schematic illustration showing the structure of
the first embodiment of the invention.
[0015] FIG. 3 is a schematic illustration showing a windward side
contacting with the flowing air according to the invention.
[0016] FIG. 4 is a schematic illustration showing a structure of a
second embodiment of the invention.
[0017] FIG. 5 is a pictorial view showing a third embodiment of the
invention.
[0018] FIG. 6 is a schematic plane view showing the third
embodiment of the invention.
[0019] FIG. 7 is a pictorial view showing a fourth embodiment of
the invention.
[0020] FIG. 8 is a schematic plane view showing the fourth
embodiment of the invention.
[0021] FIG. 9 is a schematic illustration showing the structure of
the invention applied to a LED road lamp.
DETAILED DESCRIPTION OF THE INVENTION
[0022] The present invention will be apparent from the following
detailed description, which proceeds with reference to the
accompanying drawings, wherein the same references relate to the
same elements.
[0023] Referring to FIGS. 1 and 2, a heat sink structure 10
includes a base 12 and at least one heat dissipating group 14,
wherein two heat dissipating groups 14 are depicted in the
drawings. The heat dissipating group 14 is composed of a plurality
of heat dissipating fins 142, and each heat dissipating fin 142 and
the base 12 are integrally formed. Furthermore, the heat
dissipating fins 142 of each heat dissipating group 14 are disposed
in parallel, and two neighboring heat dissipating fins 142 are not
contour fins.
[0024] Referring again to FIG. 2, the neighboring heat dissipating
fins 142 of each heat dissipating group 14 are parallel fins but
not contour fins, so the connecting lines (dashed lines in the
drawing) connecting the end portions (apexes) of the heat
dissipating fins 142 may form a convex arc structure 146.
[0025] Furthermore, the neighboring heat dissipating groups 14 may
be arranged in the same shape and have the same height or disposed
at the same level. Thus, the connecting lines connecting the apexes
of the heat dissipating fins 142 of each heat dissipating group 14
can form continuous arcs with the same form.
[0026] The arced structure 146 formed by the connecting lines
connecting the apexes of the heat dissipating fins 142 represents
the levels of the apexes gradually change from low to high or
gradually change from low to high and then from high to low.
[0027] As shown in FIG. 3, the neighboring heat dissipating fins
142 of the invention form the gradually rising structure. So, when
the flowing air contacts with the heat dissipating fin 142, the
heat on the surface of the heat dissipating fin 142 is directly
taken away, and cyclones are formed in the gap 144 between the
neighboring heat dissipating fins 142.
[0028] Because the heat dissipating fins 142 of the invention are
arranged in the gradually rising manner, a portion of the area of
each heat dissipating fin 142 on the windward side contacts with
the flowing air. On the other hand, the conventional heat
dissipating fins are arranged in the contour state, so that only
the outermost heat dissipating fin on the windward side contacts
with the flowing air. Thus, the heat dissipation efficiency of the
invention is better than that of the conventional design.
[0029] Furthermore, the cyclones formed in the gap 144 between the
neighboring heat dissipating fins 142 of the invention can quickly
take the heat on the surfaces of the heat dissipating fins 142, so
that the heat dissipation efficiency is enhanced.
[0030] As shown in FIG. 4, the neighboring heat dissipating fins
142 in each heat dissipating group 14 have different heights to
form the arced structure 146. Also, the neighboring heat
dissipating groups 14 have different heights, so the heat
dissipating fins 142 of each heat dissipating group 14 form the
arced structure 146, and the neighboring arced structures 146 are
further configured to have different heights to form the arced
configurations (shown by the dashed lines), which gradually rise
and fall. In this embodiment, the structure can provide the better
and rapider heat dissipating effect.
[0031] As shown in FIGS. 5 and 6, the top edges of the heat
dissipating fins 142 of the invention may have continuous arced
structures (wavy structures) 148 with the same shape, and the arced
structure (wavy structure) 148 of the same heat dissipating fin 142
has a plurality of arced sections with the same curvature and
height. The arced structures 148 of the neighboring heat
dissipating fins 142 may have the same structure, but the arced
sections of the neighboring arced structures 148 are staggered, so
that an included angle .theta. is formed between the connecting
line 32 connecting the end portions of the arced sections of the
neighboring arced structures 146 and a width extending direction 34
of the heat dissipating fin 142, as shown in FIG. 5.
[0032] As shown in FIGS. 7 and 8, the end portion (top edge) of
each heat dissipating fin 142 of the invention has an arced
structure (wavy structure) 148, and the arced sections of the arced
structures 148 of the same heat dissipating fin 142 may
continuously change from high to low or from low to high. In other
words, the arced structure 148 is formed by connecting the arced
sections with different heights. In addition, the arced sections of
the neighboring arced structures 148 are staggered, and the
corresponding arced structures 148 of the neighboring heat
dissipating fins 142 are not arranged in the contour manner.
[0033] Furthermore, the heat dissipating group 14 is formed with
the gradually rising structure and then the gradually falling
structure from the end A to the end B. In addition, an included
angle .theta. is formed between the corresponding connecting line
32 connecting the end portions of the arced sections of the
neighboring heat dissipating fins 142 and the width extending
direction 34 of the heat dissipating fin 142.
[0034] Thus, the heat dissipating group 14 of FIG. 7 includes the
following characteristics. First, the arced structures 148 of each
heat dissipating fin 142 have different heights. Second, the
overall end portions of the heat dissipating group 14 also form the
arced curvature. Third, the included angle is formed between the
connecting line 32 connecting the end portions of the arced
sections of the neighboring arced structures 148 and the width
extending direction 34 of the heat dissipating fin 142.
[0035] In addition, although only one heat dissipating group 14 is
illustrated in each of FIGS. 5 and 7, the heat dissipating fins 142
may be arranged into two or more heat dissipating groups 14
according to the teachings of the other embodiments.
[0036] As shown in FIG. 9, the heat dissipating fin 142 of the
invention may be applied to an outdoor opto-electronic apparatus,
such as a LED road lamp 20. Thus, the base 12 may be an upper lamp
shell 22 of the LED road lamp 20, and the heat dissipating fin 142
and the upper lamp shell 22 are integrally formed.
[0037] The structure of the heat dissipating fin 142 of FIG. 9 may
be replaced with the structure of FIG. 4, 5 or 7.
[0038] While the present invention has been described by way of
examples and in terms of preferred embodiments, it is to be
understood that the present invention is not limited thereto. To
the contrary, it is intended to cover various modifications.
Therefore, the scope of the appended claims should be accorded the
broadest interpretation so as to encompass all such
modifications.
* * * * *