Sheet-combined thermal-dissipating device
A sheet-combined thermal-dissipating device has a plurality of thermal-dissipating sheets, which are connected with each other. Each of the thermal-dissipating sheets includes a connecting portion, at least one thermal-dissipating fin and a plurality of sub-thermal-dissipating fins. The connecting portions of the thermal-dissipating sheets are connected with each other. The thermal-dissipating fin is extended outwardly from the connecting portion, and the thickness of the connecting portion is greater than that of the thermal-dissipating fin. The sub-thermal-dissipating fins are extended outwardly from at least one side of the thermal-dissipating fin.
1. Field of Invention
The invention relates to a thermal-dissipating device and, in particular, to a sheet-combined thermal-dissipating device.
2. Related Art
Recently, the electronic products usually have high performance, high operating frequencies, high speeds, and more compact sizes. However, the electronic products also generate more heat that may result in their instability. This instability can affect the reliability and lifetime of the electronic product products. Therefore, heat dissipation has become an important issue of electronic products. Thermal-dissipating fins are a common thermal-dissipating device for heat dissipation. The researchers endeavor themselves in enhancing the thermal-dissipating efficiency of the thermal-dissipating fins.
A conventional sheet-combined thermal-dissipating device consists of several connected thermal-dissipating sheets. Each of the thermal-dissipating sheets has a connecting portion and a thermal-dissipating fin extended from one side of the connecting portion. In addition, the thickness of the connecting portion is larger than that of the thermal-dissipating fin, so that there is a space between the thermal-dissipating fins of the thermal-dissipating sheets. When the connecting portion of the sheet-combined device is in touch with a heat source, the heat is transferred to the thermal-dissipating fins, and the air conduction then removes the heat thereon.
Since the sheet-combined thermal-dissipating device relies upon air conduction and convection to remove heat, it is better for the thermal-dissipating fins to have a large area in contact with air. However, the contact area is restricted by the internal space of the electronic product. Therefore, it is difficult to increase the thermal-dissipating effect. This is particularly a problem for high-frequency electronic devices.
Consequently, it is an important subject to provide a sheet-combined thermal-dissipating device that can increase the contact area between the thermal-dissipating fins and air within a limited space.
SUMMARY OF THE INVENTIONIn view of the foregoing, the invention is to provide a sheet-combined thermal-dissipating device that can increase the contact area between the thermal-dissipating fins and air for enhancing the thermal-dissipating efficiency.
To achieve the above, the invention discloses a sheet-combined thermal-dissipating device. The sheet-combined thermal-dissipating device has a plurality of thermal-dissipating sheets, and each thermal-dissipating sheet includes a connecting portion, at least one thermal-dissipating fin and a plurality of sub-thermal-dissipating fins. The connecting portions of the thermal-dissipating sheets connect with each other. The thermal-dissipating fin is extended outwardly from the connecting portion, and the thickness of the connecting portion is greater than that of the thermal-dissipating fin. The sub-thermal-dissipating fins are extended outwardly from at least one side of the thermal-dissipating fin.
To achieve the above, the invention also discloses a sheet-combined thermal-dissipating device. The sheet-combined thermal-dissipating device has a plurality of thermal-dissipating sheets, and each thermal-dissipating sheet includes a connecting portion, at least one thermal-dissipating fin and a plurality of sub-thermal-dissipating fins. The connecting portions of the thermal-dissipating sheets connect with each other. The thermal-dissipating fin is extended outwardly from the connecting portion, and the thickness of the connecting portion is greater than that of the thermal-dissipating fin. The sub-thermal-dissipating fins are extended outwardly from at least one side of the thermal-dissipating fin, and touch against the adjacent thermal-dissipating fins or sub-thermal-dissipating fins so that the thermal-dissipating fins expand outwardly from each other.
As mentioned above, the sheet-combined thermal-dissipating device of the invention has several sub-thermal-dissipating fins extended outwardly from the thermal-dissipating fins. In comparison with the related art, the sub-thermal-dissipating fins of the invention can increase the contact area between the thermal-dissipating fin and air, thereby enhancing the thermal-dissipating efficiency. Moreover, the sub-thermal-dissipating fins in the invention touch against adjacent thermal-dissipating fins or sub-thermal-dissipating fins, so that the thermal-dissipating fins can expand outwardly from each other. This configuration allows more airflow through the sheet-combined thermal-dissipating device to remove heat, further enhancing the thermal-dissipating efficiency.
The invention will become more fully understood from the detailed description and accompanying drawings, which are given for illustration only, and thus are not limitative of the present invention, and wherein:
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.
First Embodiment Unexpanded on Single Side, Same Sheet, Crossing Sub-Thermal-Dissipating FinAs shown in
In this embodiment, each thermal-dissipating sheet 21 is integrally formed. The connecting portions 211 of the thermal-dissipating sheets 21 are connected by screw fastening so as to form the sheet-combined thermal-dissipating device 2. In particular, the connecting portions 211 of the thermal-dissipating sheets 21 are connected side by side. Alternatively, the thermal-dissipating sheets 21 can also be connected using rivets.
Moreover, the thermal-dissipating sheets 21 can be completely the same or not the same. This embodiment does not restrict the shapes and sizes of the connecting portions 211, the thermal-dissipating fins 212 and the sub-thermal-dissipating fins 213. For example, the shapes and sizes of adjacent thermal-dissipating sheets 21 can be the same or different. The shapes or sizes of the thermal-dissipating fins 212 of adjacent thermal-dissipating sheets 21 can be the same or different as well. The technical importance of the embodiment is in that: the sub-thermal-dissipating fins 213 are extended from the thermal-dissipating fin 212 to increase the contact area between the sheet-combined thermal-dissipating device 2 and air, thereby enhancing the thermal-dissipating efficiency.
Second Embodiment Unexpanded on Double Sides, Same Sheet, Crossing Sub-Thermal-Dissipating FinsAs shown in
As shown in
In this embodiment, there are several ways to expand the thermal-dissipating sheets 41. For example, the thermal-dissipating sheets 41 can be expanded using an expanding apparatus. Alternatively, as shown in
As shown in
As shown in
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As shown in
As shown in
In summary, the sheet-combined thermal-dissipating device of the invention has several sub-thermal-dissipating fins extended outwardly from the thermal-dissipating fins. In comparison with the related art, the sub-thermal-dissipating fins of the invention can increase the contact area between the thermal-dissipating fin and air, thereby enhancing the thermal-dissipating efficiency. Moreover, the sub-thermal-dissipating fins in the invention touch against adjacent thermal-dissipating fins or sub-thermal-dissipating fins, so that the thermal-dissipating fins can expand outwardly from each other. This configuration allows more airflow through the sheet-combined thermal-dissipating device to remove heat, further enhancing the thermal-dissipating efficiency.
Although the invention has been described with reference to specific embodiments, this description is not meant to be construed in a limiting sense. Various modifications of the disclosed embodiments, as well as alternative embodiments, will be apparent to persons skilled in the art. It is, therefore, contemplated that the appended claims will cover all modifications that fall within the true scope of the invention.
Claims
1. A sheet-combined thermal-dissipating device having a plurality of thermal-dissipating sheets, each of the thermal-dissipating sheets comprising:
- a connecting portion, wherein the connecting portions of the thermal-dissipating sheets connect with each other;
- at least one thermal-dissipating fin, which is extended outwardly from the connecting portion, wherein a thickness of the connecting portion is greater than a thickness of the thermal-dissipating fin; and
- a plurality of sub-thermal-dissipating fins, which are extended outwardly from at least one side of the thermal-dissipating fin.
2. The sheet-combined thermal-dissipating device of claim 1, wherein a length of the sub-thermal-dissipating fins is larger than, equal to, or smaller than the distance between adjacent two of the thermal-dissipating fins.
3. The sheet-combined thermal-dissipating device of claim 2, wherein the thermal-dissipating fins expand outwardly from each other when the length of the sub-thermal-dissipating fins is larger than the distance between adjacent two of the thermal-dissipating fins.
4. The sheet-combined thermal-dissipating device of claim 1, wherein when each of the thermal-dissipating sheets has a plurality of thermal-dissipating fins, each of the thermal-dissipating fins is extended outwardly from opposite sides of the connecting portion.
5. The sheet-combined thermal-dissipating device of claim 4, wherein the shapes or sizes of the thermal-dissipating fins are the same or different.
6. The sheet-combined thermal-dissipating device of claim 1, wherein the sub-thermal-dissipating fins are disposed symmetrically or asymmetrically on opposite sides of the thermal-dissipating fin.
7. The sheet-combined thermal-dissipating device of claim 1, wherein the sub-thermal-dissipating fins are disposed vertically or non-vertically on opposite sides of the thermal-dissipating fin.
8. The sheet-combined thermal-dissipating device of claim 1, wherein each of the thermal-dissipating sheets further comprises at least one thermal-dissipating portion extended outwardly from the connecting portion.
9. The sheet-combined thermal-dissipating device of claim 8, wherein the thermal-dissipating portions expand outwardly from each other.
10. The sheet-combined thermal-dissipating device of claim 1, wherein the shapes or sizes of adjacent two of the thermal-dissipating sheets are the same or different.
11. The sheet-combined thermal-dissipating device of claim 1, wherein the sub-thermal-dissipating fins and the adjacent sub-thermal-dissipating fins are disposed alternately.
12. The sheet-combined thermal-dissipating device of claim 1, wherein the sub-thermal-dissipating fins touch against the adjacent sub-thermal-dissipating fins so that the thermal-dissipating fins expand outwardly from each other.
13. A sheet-combined thermal-dissipating device having a plurality of thermal-dissipating sheets, each of the thermal-dissipating sheets comprising:
- a connecting portion, wherein the connecting portions of the thermal-dissipating sheets connect with each other;
- at least one thermal-dissipating fin, which is extended outwardly from the connecting portion, wherein a thickness of the connecting portion is greater than a thickness of the thermal-dissipating fin; and
- a plurality of sub-thermal-dissipating fins, which are extended outwardly from at least one side of the thermal-dissipating fin, wherein the sub-thermal-dissipating fins touch against the adjacent thermal-dissipating fins or sub-thermal-dissipating fins so that the thermal-dissipating fins expand outwardly from each other.
14. The sheet-combined thermal-dissipating device of claim 13, wherein when each of the thermal-dissipating sheets has a plurality of thermal-dissipating fins, each of the thermal-dissipating fins is extended outwardly from opposite sides of the connecting portion.
15. The sheet-combined thermal-dissipating device of claim 13, wherein the sub-thermal-dissipating fins are disposed symmetrically or asymmetrically on opposite sides of the thermal-dissipating fin.
16. The sheet-combined thermal-dissipating device of claim 13, wherein the sub-thermal-dissipating fins are disposed vertically or non-vertically on opposite sides of the thermal-dissipating fin.
17. The sheet-combined thermal-dissipating device of claim 13, wherein each of the thermal-dissipating sheets further comprises at least one thermal-dissipating portion extended outwardly from the connecting portion.
18. The sheet-combined thermal-dissipating device of claim 17, wherein the thermal-dissipating portions expand outwardly from each other.
19. The sheet-combined thermal-dissipating device of claim 13, wherein the shapes or sizes of adjacent two of the thermal-dissipating sheets are the same or different.
20. The sheet-combined thermal-dissipating device of claim 13, wherein the sub-thermal-dissipating fins and the adjacent sub-thermal-dissipating fins are disposed alternately.
Type: Application
Filed: Aug 21, 2007
Publication Date: Feb 26, 2009
Inventor: Ching-Sung Kuo (Taipei County)
Application Number: 11/892,239
International Classification: F28F 7/02 (20060101);