Fans and electronic devices utilizing the same
Electronic devices and fans thereof are provided. An electronic device comprises a fan cavity and separately disposed heat sources. A fan is disposed in the fan cavity with a frame shaped according to the profile of the fan cavity. The frame also includes an extended portion formed according to the relative position of the fan cavity and separated heat sources, optimizing the heat dissipation.
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The invention relates to fans, and in particular, to fans for electronic devices.
Typically, when designing an axial fan, airflow outlet/inlet size thereof is increased to raise airflow. Generally, conventional fans utilize a square frame, as shown in
Conventionally, the center of the fan is aligned with a heat source to optimize heat dissipation.
The heat source 1a cannot always be directly on the center line 13 of the fan because other components in the system occupy the same space. In such cases, a new fan of a larger size or with a higher rotational speed is required, raising production costs and generating relatively more noise.
Accordingly, U.S. Pat. No. 6,386,843 discloses a fan capable of dissipating heat from a plurality of heat sources. Referring to
Fans and electronic devices utilizing the same are provided. An exemplary embodiment of an electronic device comprises a housing, a heat source, and a fan. The housing comprises a fan cavity. The heat source is disposed in the housing. The fan is disposed in the fan cavity. The fan comprises a frame. The frame comprises an airflow outlet, an airflow inlet, and a first extended portion. The first extended portion is disposed at the airflow outlet or the airflow inlet. An inclined angle, an entending direction or a position of the first extended portion is adjusted according to a position or a shape of the fan cavity or the heat source.
An exemplary embodiment of a fan, for dissipating heat from a heat source, comprises a frame and a blade. The frame comprises an airflow outlet, an airflow inlet, and a first extended portion. The first extended portion is disposed at the airflow outlet or the airflow inlet. An inclined angle, an entending direction or a position of the first extended portion is adjusted according to the position of the heat source. The blade is disposed on the frame.
Some embodiments of an electronic device comprise a housing, a heat source, and a fan. The heat source is disposed in the housing. The fan is disposed in the housing. The fan comprises a frame with an extended portion near the heat source.
Some embodiments of an electronic device comprise a housing, a plurality of heat sources, and a fan. The heat sources are disposed in the housing. The fan is disposed in the housing. The fan comprises a frame with an extended portion near each heat source. The extended portion is disposed at an airflow inlet or an airflow outlet of the fan.
Some embodiments of an electronic device comprise a housing and a fan, wherein the housing comprises a fan cavity with a fan disposed therein. The fan comprises a frame, and the shape of the frame is adjusted according to that of the fan cavity.
Some embodiments of a fan comprise a frame and a blade. The frame comprises an airflow outlet, an airflow inlet, a first extended portion, and a second extended portion. The first extended portion is disposed at the airflow outlet. The second extended portion is disposed at the airflow inlet. The blade is disposed on the frame. Inclined angles of the first and the second extended portions are different. Extended depths of the first and the second extended portions are different.
Some embodiments of a fan, for dissipating heat from a heat source, comprise a frame and a blade. The frame comprises an airflow outlet, an airflow inlet, and a first extended portion. The first extended portion is disposed at the airflow outlet. An inclined angle or an entending direction of the first extended portion is adjusted according to a position of the heat source. The blade is disposed on the frame. Sectional areas of the airflow inlet and the airflow outlet are different. Shapes of the airflow inlet and the airflow outlet are different.
Some embodiments of a fan comprise a frame and a blade. The frame comprises an airflow outlet, an airflow inlet, a first extended portion, and a second extended portion. The first extended portion is disposed at the airflow outlet. The second extended portion is disposed at the airflow inlet. The blade is disposed on the frame. The frame is circular, oval, equilateral polygonal, scalene polygonal, trapezoidal, sectorial, or irregular shaped.
DESCRIPTION OF THE DRAWINGSFans and electronic devices can be more fully understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein:
As shown in
As shown in FIGS. 3A=18 3C, the fan 30 is an axial fan with a rectangular frame 31. The frame 31 comprises an airflow outlet 31b, an airflow inlet 31c, two extended portions 31d and 31e, and a bushing 33. A stator coil 32 is wound at the bushing 33, and a blade 35 is connected with the bushing 33 through a pivot 34. The extended portion 31d is disposed at the airflow outlet 31b. The inclined angle of the extended portion 31d is adjusted according to the relative position of the fan cavity 2d and the heat sources 2b and 2c. Suppose two heat sources spaced the same distance are disposed in
Referring to
In
As shown in
As shown in FIGS. 4B˜4C, the frame 41 of the fan 40 is similar to the previously described frame 31. The frame 41 is rectangular. The frame 41 comprises an airflow outlet 41c, an airflow inlet 41d, and two extended portions 41a and 41b. The extended portions 41a and 41b are disposed at the airflow outlet 41c and the airflow inlet 41d respectively. The main difference between this and previously described frames is that the extended portions 41a and 41b have different inclined angles (θ1 and θ2) and extended depths (d1 and d2). As shown in
Referring to
As shown in
As shown in FIGS. 7A˜7D, the frame 71 comprises an extended portion 71a formed at the airflow outlet 71c and another extended portion 71b formed at the airflow inlet 71d. The main difference between this and previously described frames is described in the following. The frame 71 is oval. The inclined angles and depths of the extended portions are adjusted according to the heat sources 4b and 4c and the fan cavity 4d in the housing 4a, thus changing the scope of the airflow field to suit various kinds of heat sources.
The shape of the frame can be optimized according to the fan cavity in the system.
In
The fan cavity 5a in
While the invention has been described by way of example and in terms of several embodiments, it is to be understood that the invention is not limited thereto. To the contrary, it is intended to cover various modifications and similar arrangements (as would be apparent to those skilled in the art). Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.
Claims
1. An electronic device, comprising:
- a housing;
- at least a heat source disposed in the housing; and
- a fan disposed in the housing, wherein the fan comprises a frame, the frame comprises an airflow outlet, an airflow inlet, and a first extended portion, the first extended portion is disposed at the airflow outlet or the airflow inlet, and an inclined angle, an extending direction or a position of the first extended portion is adjusted according to a position of the heat source.
2. The electronic device as claimed in claim 1, wherein the shape of the frame is appropriately modified according to the housing.
3. The electronic device as claimed in claim 1, wherein the frame further comprises a second extended portion, and the second extended portion is disposed at the airflow outlet or the airflow inlet where the first extended portion is not disposed.
4. The electronic device as claimed in claim 3, wherein an inclined angle of the second extended portion is adjusted according to a position of the housing for increasing airflow.
5. The electronic device as claimed in claim 3, wherein the inclined angles or the extended depths of the first and the second extended portions are different.
6. The electronic device as claimed in claim 3, wherein the second extended portion comprises a plurality of segments, and the distance between each segment and an end of a blade of the fan is different.
7. The electronic device as claimed in claim 1, wherein the sectional areas or the shape of the airflow inlet and the airflow outlet are different, or the airflow inlet and the airflow outlet are not parallel.
8. The electronic device as claimed in claim 1, wherein the frame is circular, oval, equilateral polygonal, scalene polygonal, trapezoidal, sectorial, or irregular shaped.
9. The electronic device as claimed in claim 1, wherein the first extended portion comprises a plurality of segments, and the distance between each segment and an end of a blade of the fan is different.
10. The electronic device as claimed in claim 1, wherein the frame comprises a plurality of segments with different inclined angles or axial heights.
11. A fan for dissipating heat from at least a heat source, comprising:
- a frame comprising an airflow outlet, an airflow inlet, and a first extended portion, wherein the first extended portion is disposed at the airflow outlet or the airflow inlet, and an inclined angle, an extending direction or a position of the first extended portion is adjusted according to a position of the heat source; and
- a blade disposed in the frame.
12. The fan as claimed in claim 11, wherein the frame further comprises a second extended portion, and the second extended portion is disposed at one of the airflow outlet or the airflow inlet where the first extended portion is not disposed.
13. The fan as claimed in claim 12, wherein the inclined angles or the extended depths of the first and the second extended portions are different.
14. The fan as claimed in claim 12, wherein the second extended portion comprises a plurality of segments, and the distance between each segment and an end of the blade is different.
15. The fan as claimed in claim 11, wherein the first extended portion comprises a plurality of segments, and the distance between each segment and an end of the blade is different.
16. The fan as claimed in claim 11, wherein the sectional areas or the shape of the airflow inlet and the airflow outlet are different, or the airflow inlet and the airflow outlet are not parallel.
17. The fan as claimed in claim 11, wherein the frame comprises a plurality of segments, and the axial heights or the inclined angles of any two adjacent segments are different.
18. The fan as claimed in claim 11, wherein the frame is circular, oval, equilateral polygonal, scalene polygonal, trapezoidal, sectorial, or irregular shaped.
19. An electronic device comprising:
- a housing comprising a fan cavity; and
- a fan disposed in the fan cavity, wherein the fan comprises a frame, and the shape of the frame is adjusted according to that of the fan cavity.
20. The electronic device as claimed in claim 19, wherein the frame comprises a plurality of segments, and the axial heights or the inclined angles of any two adjacent segments are different.
Type: Application
Filed: Aug 31, 2005
Publication Date: Mar 2, 2006
Applicant:
Inventors: Yu-Chien Kao (Taoyuan Hsien), Yi-Fang Chou (Taoyuan Hsien), Tsu-Liang Lin (Taoyuan Hsien), Wen-Shi Huang (Taoyuan Hsien)
Application Number: 11/214,808
International Classification: F04B 17/00 (20060101); F04B 35/04 (20060101);