Heat-Dissipating Fan
A heat-dissipating fan has two intakes and can be used for mounting on a heat-generating element. The heat-dissipating fan mainly includes a base, a blade assembly, an outer casing and a cover. The base has an accommodating trough for accommodating the blade assembly. The bottom of the accommodating trough is provided with a plurality of first intakes. Further, the outer casing is provided above the base and correspondingly combined with the base. The center of the outer casing is provided with a second intake. Finally, the cover is provided under the base and correspondingly connected to the bottom of the base. With the above arrangement, when two adjacent heat-dissipating fans operate at the same time, with the closing action of the cover, the interference in the air-extracting action between the facing intakes of the two adjacent heat-dissipating fans can be reduced to keep the heat-dissipating effect of the fan.
1. Field of the Invention
The present invention relates to a heat-dissipating device, and in particular to a heat-dissipating fan for mounting on a heat-generating element.
2. Description of Prior Art
Owing to the tendency to pursue a small-sized and light device, the heat generated by the device is inevitably increased to a great extent. In order not to influence the operation of the electronic element by the increasing temperature resulted from the heat source, the heat-dissipating effect should be increased accordingly. Therefore, a technical measure that is most widely used is to directly mount the heat-dissipating device on the heat-generating element, thereby to improve the heat-dissipating performance with respect to the heat-generating element.
With the increase in the functions of a modern computer, the number of the electronic elements provided within the computer is increasing accordingly. For example, interface cards having various functions (such as display card or graphic card) are inserted on a main board to improve the original functions of the computer. However, according to the above, with the increasing precision of the electronic technique, the operation of the electronic elements will inevitably generate more and more heat. In order to let the electronic elements having different functions operate under respectively suitable temperature, conventionally, a dedicated centrifugal structure of a heat-dissipating fan is directly mounted on the electronic elements such as an interface card. With the airflow generated by the fan, the airflow is directly introduced to the periphery of the interface via a designed airflow path. As a result, the heat generated by the operation of the interface card can be rapidly carried away by the airflow, thereby to achieve a desired heat-dissipating effect.
Although the air-cooling action of the heat-dissipating fan can achieve the heat dissipation of the interface card, the heat-dissipating efficiency of the heat-dissipating fan depends on the amount of the airflow. Therefore, in order to improve the heat-dissipating effect of the fan, a centrifugal fan having two intakes is subsequently developed. With such design, the amount of the air generated by the heat-dissipating fan can be increased to satisfy a desired heat-dissipating efficiency.
However, since the electronic elements such as interface card are juxtaposed on the man board, when the heat-dissipating fan having two intakes is respectively disposed on the juxtaposed electronic elements, the space between two adjacent heat-dissipating fans is so limited. Further, since the heat-dissipating fan has two intakes, the intakes of the two adjacent heat-dissipating fans will operate face to face, which interferes the air-extracting action with each other and adversely reduces the amount of air generated by each fan. As a result, the air-cooling action of the heat-dissipating fan is greatly reduced, which becomes a drawback of such conventional device.
In view of the above, the inventor proposes the present invention to overcome the above problems based on his expert experiences and deliberate researches.
SUMMARY OF THE INVENTIONIn view of the above drawback, the present invention is to provide a heat-dissipating fan. When two adjacent heat-dissipating fans operate at the same time, a cover is used to close the intake of one fan facing to the intake of the other fan. In this way, the interference in the air-extracting action between the facing intakes of two adjacent fans can be avoided, thereby to keep the heat-dissipating performance of the heat-dissipating fans.
The present invention provides a heat-dissipating fan comprising a base, a blade assembly, an outer casing and a cover. The base further comprises an accommodating trough and an opening. The accommodating trough is used to accommodate the blade assembly. The bottom of the accommodating trough is provided with a plurality of first intakes. The opening is used to guide the airflow generated by the fan to the outside. Further, the outer casing is provided above the base and correspondingly combined with the base. The center of the outer casing is provided with a second intake. Finally, the cover is provided under the accommodating trough of the base and correspondingly connected to the bottom of the base. With the above arrangement, when two adjacent heat-dissipating fans operate at the same time, with the closing action of the cover, the interference in the air-extracting action of the facing intakes of the two adjacent heat-dissipating fans can be reduced, thereby to keep the heat-dissipating effect of the fan.
The features of the invention believed to be novel are set forth with particularity in the appended claims. The invention itself however may be best understood by reference to the following detailed description of the invention, which describes certain exemplary embodiments of the invention, taken in conjunction with the accompanying drawings in which:
With reference to
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Although the present invention has been described with reference to the foregoing preferred embodiment, it will be understood that the invention is not limited to the details thereof. Various equivalent variations and modifications can still be occurred to those skilled in this art in view of the teachings of the present invention. Thus, all such variations and equivalent modifications are also embraced within the scope of the invention as defined in the appended claims.
Claims
1. A heat-dissipating fan for mounting on a heat-generating element, comprising:
- a base having an accommodating trough, a bottom of the accommodating trough having a first intake;
- a blade assembly including a plurality of blades and disposed in the accommodating trough of the base;
- an outer casing provided above the base and connected thereto, the outer casing having a second intake thereon; and
- a cover provided under the base for closing the first intake.
2. The heat-dissipating fan according to claim 1, wherein the base further has an opening.
3. The heat-dissipating fan according to claim 2, wherein the opening is further connected to an air covering.
4. The heat-dissipating fan according to claim 1, wherein the accommodating trough is further provided with a positioning pillar therein.
5. The heat-dissipating fan according to claim 4, wherein the positioning pillar is surrounded by the first intake.
6. The heat-dissipating fan according to claim 1, wherein the side of the first intake is provided with at least one engaging end.
7. The heat-dissipating fan according to claim 6, wherein the engaging end further comprises a notch and a slice body.
8. The heat-dissipating fan according to claim 7, wherein the slice body is provided with a protruding block thereon.
9. The heat-dissipating fan according to claim 1, wherein the periphery of the base is further provided with a plurality of connecting holes.
10. The heat-dissipating fan according to claim 1, wherein the center of the blade assembly is further provided with an accommodating hole.
11. The heat-dissipating fan according to claim 10, wherein the accommodating hole is combined with the positioning pillar.
12. The heat-dissipating fan according to claim 1, wherein the periphery of the outer casing is further provided with a plurality of locking holes.
13. The heat-dissipating fan according to claim 12, wherein the locking holes are connected correspondingly to the connecting holes.
14. The heat-dissipating fan according to claim 13, wherein the locking holes are fixedly connected to the connecting holes via fastening elements.
15. The heat-dissipating fan according to claim 1, wherein the cover is further provided with at least one locking piece.
16. The heat-dissipating fan according to claim 15, wherein the locking piece is formed into an inverted-L shape.
17. The heat-dissipating fan according to claim 15, wherein the locking piece is locked with the slice body of the engaging end.
18. The heat-dissipating fan according to claim 1, wherein the cover is further provided with a plurality of protruding strips.
19. The heat-dissipating fan according to claim 18, wherein the plurality of protruding strips each corresponds to the inside and outside of the first intake.
20. The heat-dissipating fan according to claim 1, wherein the cover is further provided with a through hole thereon.
Type: Application
Filed: Jun 1, 2006
Publication Date: Dec 6, 2007
Inventor: Chih-Heng Yang (Taipei)
Application Number: 11/421,559
International Classification: F01D 3/02 (20060101);