Heat-dissipating device with thin fins
A heat-dissipating device with a base and multiple fins is described. The base has multiple grooves formed periodically thereon. Each of the fins has an end formed with a folded portion. The ends with the folded portions are thicker than the fins themselves and fixed within the grooves of the base. The fins can be made thinner than conventional ones. Hence, the number of the fins of the heat-dissipating device can be increased to enhance the heat-dissipating efficiency thereof. Furthermore, the grooves of the present invention can be made wider, so the manufacture of the present invention is easy and the overall cost is low.
1. Field of the Invention
The present invention is related to a heat-dissipating device with thin fins, and more particularly, to a heat-dissipating device with fins thinner than conventional ones. Hence, the number of fins of the heat-dissipating device can be increased to enlarge the heat-dissipating area, so the heat-dissipating efficiency can be enhanced. Furthermore, the grooves of the present invention don't need to be narrowed, so the manufacture of the present invention is easy and the overall cost is low.
2. Description of Related Art
With the rapid progress of computer industries, electronic heat sources, such as chips or central processing units (CPUs), have faster and faster processing speeds and produce increasing amounts of heat. In order to dissipate heat and maintain a normal operation state, a heat-dissipating device is usually attached to the electronic heat source. The heat-dissipating device has a larger heat-dissipating surface. The heat-dissipating device uses its heat-dissipating fins to dissipate heat.
Reference is made to
Reference is made to
An objective of the present invention is to provide a heat-dissipating device, which has fins thinner than conventional ones. The number of fins of the heat-dissipating device can thus be increased to enlarge the heat-dissipating area, thereby enhancing the heat-dissipating efficiency thereof. Furthermore, each of the fins has one end formed with a folded portion. Thus, the ends of the folded portions are thicker than the fins themselves. Hence, the grooves for disposition of the fines can be made wider, so the manufacture of the present invention is easy and the overall cost is low.
For achieving the objective above, the present invention provides a heat-dissipating device, including a base and multiple fins. The base has a plurality of grooves formed periodically thereon. Each of the fins has an end formed with a folded portion. The ends with the folded portions are thicker than the fins themselves, and are fixed within the grooves of the base.
Numerous additional features, benefits and details of the present invention are described in the detailed description, which follows.
BRIEF DESCRIPTION OF THE DRAWINGSThe foregoing aspects and many of the attendant advantages of this invention will be more readily appreciated as the same becomes better understood by reference to the following detailed description, when taken in conjunction with the accompanying drawings, wherein:
Reference is made to
The fins 2 are sheet-shaped and made of copper or aluminum, which has a good heat-transfer property. The fins 2 are thinner than conventional ones, and each has one end formed with a folded portion 21. The folded portion 21 is formed at the end for disposition on the base 1, i.e. the lower end. Since the folded portions 21 are formed by folding the fins 2, they are thicker and have twice width of the fins 2. Hence, the grooves 13 of the base 1 can be made wider than the fins 2.
In the process to combine the base 1 and the fins 2, the base 1 is first heated to a temperature ranging from 1000-1100° C. Thus, the base is completely softened and the folded portions 21 of the fins 2 can be easily disposed within the grooves 13. After the ends of the fins 2 with the folded portions 21 are placed in the grooves 13, two opposite sides of the base 1 are pressed equivalently by an external force to change the shape of the groove 13 to clip the ends of the fins 2 with the folded portions 21. In this way, the fins 2 are fixed on the base 1. According to the above disclosure, the heat-dissipating device of the present invention is provided.
The method of using an external force to press two opposite sides of the base 1 to clip the fins 2 to fix the fins 2 on the base 1 is just a preferred embodiment. The present invention is not limited thereto. The fins 2 can be fixed on the base by welding or other methods.
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Furthermore, the lower ends of the fins 2 are formed with the folded portions 21, so the lower ends of the fins 2 are thicker. In this way, although the fins 2 are made thinner, the grooves 13 of the base 1 don't need to be narrowed. Therefore, the grooves 13 can still be made relatively wider. This method lowers the difficulty and cost of manufacture.
Although the present invention has been described with reference to the preferred embodiments thereof, it will be understood that the invention is not limited to the details thereof. Various substitutions and modifications have been suggested in the foregoing description, and others will occur to those of ordinary skill in the art. Therefore, all such substitutions and modifications are embraced within the scope of the invention as defined in the appended claims.
Claims
1. A heat-dissipating device, comprising:
- a base, including a plurality of grooves formed periodically thereon; and
- a plurality of fins, wherein each fin has an end formed with a folded portion, ends with the folded portions being thicker than the fins themselves, and the ends with the folded portions being fixed within the grooves of the base.
2. The heat-dissipating device as claimed in claim 1, wherein the folded portions are formed at lower ends of the fins.
3. The heat-dissipating device as claimed in claim 1, wherein the base is made of copper or aluminum.
4. The heat-dissipating device as claimed in claim 1, wherein the base has a central portion and two wing portions extending from the central portion, and the grooves are formed periodically on the central portion and the wing portions.
5. The heat-dissipating device as claimed in claim 1, wherein the fins are made of copper or aluminum.
6. The heat-dissipating device as claimed in claim 1, wherein the base is first heated and thus softened, and two opposite sides of the base are then pressed equivalently by an external force to change a shape of the grooves, thereby clipping the ends with the folded portions.
Type: Application
Filed: Sep 7, 2005
Publication Date: Mar 8, 2007
Inventor: Kuang-Ming Hsiao (Shi-Chi City)
Application Number: 11/219,789
International Classification: F28F 7/00 (20060101);