Heat-dissipation structure for motor
A heat-dissipation structure for a motor. The heat-dissipation structure comprises a shaft, a seat and a rotator. The rotator coupled to the seat by the shaft comprises a housing and a cover. The housing comprises an inner side connected to the shaft and a bottom comprising at least one through hole. The cover is connected to an exterior of the bottom of the housing and a distance is formed between the cover and the housing, so that the cover prevents objects from entering the through hole.
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The invention relates to a heat-dissipation structure for a motor, and in particular to a heat-dissipation structure for a fan motor.
A motor is an active driving device for actuating an impeller to produce airflow to dissipate heat. Centrifugal and axial-flow fan motors are two major types of motors.
In
Heat generated by the interior of the rotator 10 or 20 over a long period of operation, however, cannot be dissipated to an exterior. Thus, the motor is easily overheated and the life thereof is reduced.
To solve this problem, two centrifugal fan motors 3 and 4 shown in
In
In
Dust or particles cannot be completely stopped from entering the fan motors 3 and 4 via the through holes 400 and 500, however, thus a shaft of the fan motors 3 and 4 tend to be obstructed by dust or particle accumulation reducing average life thereof.
SUMMARYThe invention provides a heat-dissipation structure for a motor to dissipate heat to the exterior and prevent particles from entering therein.
The heat-dissipation structure comprises a seat and a rotator. The rotator coupled to the seat by a shaft comprises a cylindrical housing and a cover. The housing has an inner side connected to the shaft and a bottom comprising at least one through hole. The cover covers the housing and positioned apart from the housing by a distance. Thus, the cover prevents objects such as dust or particles from entering via the through hole as the rotator is rotated, and the generated heat is efficiently dissipated to the exterior.
The cover of the invention is connected to the exterior of the bottom of the housing via a plurality of radially arranged guiding blades, and at least one through hole is formed between any two adjacent guiding blades. The cover is connected to the exterior of the bottom of the housing via a bar, and the housing is integrally formed with the cover and the guiding blade as a single piece.
In a embodiment, the housing of the heat-dissipation structure comprises a first part and a second part connected to the first part. An inner side of the first part is connected to the shaft, and at least one through hole is formed on a bottom of the first part, and the second part is connected to the cover via the guiding blade, and a distance is formed between the cover and the second part.
The heat-dissipation structure is employed on a fan structure, and the heat-dissipation structure further comprises an impeller surrounding the rotator. Thus, the impeller is rotated together with the rotator. The fan structure is a centrifugal fan or an axial-flow fan structure.
BRIEF DESCRIPTION OF THE DRAWINGSThe invention can be more fully understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein:
In
As the centrifugal fan motor 5 is actuated, the impeller 51 rotated by the rotator 50 produces an airflow pressure difference, and airflow moves in a direction 60 in
Thus, with the guiding blades 502 arranged outwardly and radially connect the cover 501 to the exterior of the bottom of the housing 505, airflow inside of the housing 505 is effectively and efficiently expelled to the exterior by the rotating guiding blades 502, increasing heat-dissipation efficiency. Alternatively, when the cover 501 overlaps all through holes 500 on the bottom of the housing 505, objects such as dust or particles are completely stopped from entering the housing 505 via the through holes 500, so that the shaft 56 is prevented from being obstructed and thus its average life thereof increases.
In
It is noted that all features of the invention can be applied in an axial-flow fan structure (not shown) and any kind of motor, especially for an axial-flow fan structure equipped with a frame (not shown).
While the invention has been described with respect to preferred embodiment, it is to be understood that the invention is not limited thereto the disclosed embodiments, but, on the contrary, is intended to accommodate various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims
1. A heat-dissipation structure for a motor, comprising:
- a shaft;
- a seat; and
- a rotator coupled to the seat by the shaft, comprising: a housing connected to the shaft and comprising at least one through hole; and a cover covering the housing and positioned apart from the housing by a distance, so that the cover prevents an object from entering the through hole.
2. The heat-dissipation structure of the motor as claimed in claim 1, wherein a heat generated in the rotator is expelled to an exterior of the housing from the through hole via the distance as the rotator is rotated.
3. The heat-dissipation structure of the motor as claimed in claim 1 further comprising at least one guiding blade for connecting the cover to the housing.
4. The heat-dissipation structure of the motor as claimed in claim 3 further comprising a plurality of guiding blades radially arranged inside an inner surface of the cover.
5. The heat-dissipation structure of the motor as claimed in claim 4, wherein at least one through hole is formed between any two adjacent guiding blades.
6. The heat-dissipation structure of the motor as claimed in claim 1 further comprising at least one bar used for connecting the cover to the housing.
7. The heat-dissipation structure of the motor as claimed in claim 3, wherein the housing is integrally formed with the cover and the guiding blade as a single piece.
8. The heat-dissipation structure of the motor as claimed in claim 3, wherein the housing comprises a first part and a second part connected to the first part, and an inner side of the first part is connected to the shaft, and at least one through hole is formed on the first part, and the second part is connected to the cover via the guiding blade, and a distance is formed between the cover and the second part.
9. The heat-dissipation structure of the motor as claimed in claim 1, wherein the heat-dissipation structure further comprises an impeller surrounding the rotator, so that the impeller is rotated with the rotator.
10. The heat-dissipation structure of the motor as claimed in claim 1, wherein the heat-dissipation structure further comprises an impeller connecting to the rotator, so that the impeller is rotated with the rotator.
11. The heat-dissipation structure of the motor as claimed in claim 1, wherein the impeller comprises a centrifugal impeller.
12. The heat-dissipation structure of the motor as claimed in claim 10, wherein the impeller comprises an axial-flow impeller.
13. The heat-dissipation structure of the motor as claimed in claim 12, wherein the fan structure further comprises a frame enclosing the impeller.
14. The heat-dissipation structure of the motor as claimed in claim 1, wherein the housing is substantially cylindrical.
15. A heat-dissipation structure for a motor, comprising:
- a shaft;
- a seat; and
- a rotator coupled to the seat by the shaft, comprising: a housing comprising at least one through hole; a cover connecting to the shaft and covering the housing, positioned apart from the housing by a distance, so that the cover prevents an object from entering the through hole; and at least one guiding blade for connecting the cover to the housing.
16. The heat-dissipation structure of the motor as claimed in claim 15, wherein a heat generated in the rotator is expelled to an exterior of the housing from the through hole via the distance as the rotator is rotated.
17. The heat-dissipation structure of the motor as claimed in claim 15 further comprising a plurality of guiding blades radially arranged inside an inner surface of the cover.
18. The heat-dissipation structure of the motor as claimed in claim 15, wherein at least one through hole is formed between any two adjacent guiding blades.
19. The heat-dissipation structure of the motor as claimed in claim 15 further comprising at least one bar used for connecting the cover to the housing.
20. The heat-dissipation structure of the motor as claimed in claim 15, wherein the housing is integrally formed with the cover and the guiding blade as a single piece.
Type: Application
Filed: Feb 16, 2005
Publication Date: Mar 9, 2006
Applicant:
Inventors: Hung-Chi Chen (Taoyuan Hsien), Ying-Chi Chen (Taoyuan Hsien), Te-Tsai Chuang (Taoyuan Hsien), Kuo-Cheng Lin (Taoyuan Hsien), Wen-Shi Huang (Taoyuan Hsien)
Application Number: 11/058,230
International Classification: F04B 17/00 (20060101); F04B 35/04 (20060101);