HEAT SINK STRUCTURE
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.
1. Field of the Invention
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.
2. Related Art
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.
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.
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.
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.
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 INVENTIONIt 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.
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.
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.
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.
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.
Referring to
Referring again to
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.
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.
As shown in
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.
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.
As shown in
As shown in
As shown in
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 θ 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.
Thus, the heat dissipating group 14 of
In addition, although only one heat dissipating group 14 is illustrated in each of
As shown in
The structure of the heat dissipating fin 142 of
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.
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.
Type: Application
Filed: Mar 19, 2012
Publication Date: Feb 7, 2013
Inventor: Takeho HSU (Taipei City)
Application Number: 13/423,372