U.S. patent application number 11/058230 was filed with the patent office on 2006-03-09 for heat-dissipation structure for motor.
This patent application is currently assigned to Delta Electronics, Inc.. Invention is credited to Hung-Chi Chen, Ying-Chi Chen, Te-Tsai Chuang, Wen-Shi Huang, Kuo-Cheng Lin.
Application Number | 20060051221 11/058230 |
Document ID | / |
Family ID | 35996430 |
Filed Date | 2006-03-09 |
United States Patent
Application |
20060051221 |
Kind Code |
A1 |
Chen; Hung-Chi ; et
al. |
March 9, 2006 |
Heat-dissipation structure for motor
Abstract
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.
Inventors: |
Chen; Hung-Chi; (Taoyuan
Hsien, TW) ; Chen; Ying-Chi; (Taoyuan Hsien, TW)
; Chuang; Te-Tsai; (Taoyuan Hsien, TW) ; Lin;
Kuo-Cheng; (Taoyuan Hsien, TW) ; Huang; Wen-Shi;
(Taoyuan Hsien, TW) |
Correspondence
Address: |
BIRCH STEWART KOLASCH & BIRCH
PO BOX 747
FALLS CHURCH
VA
22040-0747
US
|
Assignee: |
Delta Electronics, Inc.
|
Family ID: |
35996430 |
Appl. No.: |
11/058230 |
Filed: |
February 16, 2005 |
Current U.S.
Class: |
417/423.8 ;
417/423.1 |
Current CPC
Class: |
F04D 29/329 20130101;
F04D 25/082 20130101 |
Class at
Publication: |
417/423.8 ;
417/423.1 |
International
Class: |
F04B 17/00 20060101
F04B017/00; F04B 35/04 20060101 F04B035/04 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 6, 2004 |
TW |
093126850 |
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.
Description
BACKGROUND
[0001] The invention relates to a heat-dissipation structure for a
motor, and in particular to a heat-dissipation structure for a fan
motor.
[0002] 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.
[0003] In FIG. 1A, a conventional centrifugal fan motor 1 comprises
a rotator 10, an impeller 11 and a motor (not shown). The impeller
11 is installed on the rotator 10 driven by the motor. As the
rotator 10 is actuated, the impeller 11 thereon is synchronically
rotated to produce airflow for heat dissipation. In FIG. 1B, a
conventional axial-flow fan motor 2 comprises a rotator 20, an
impeller 21, a frame 22 and a motor (not shown). The impeller 21 is
installed on the rotator 20 driven by the motor, and the rotator 20
and the impeller 21 are enclosed by the frame 22. As the rotator 20
is actuated, the impeller 21 thereon is synchronically rotated to
produce airflow for heat dissipation, and airflow therein can be
efficiently collected by the frame 22.
[0004] 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.
[0005] To solve this problem, two centrifugal fan motors 3 and 4
shown in FIGS. 2A and 2B are provided by forming a plurality of
through holes on a rotator thereof.
[0006] In FIG. 2A, the fan motor 3 comprises a rotator 30 formed
with a plurality of through holes 300, an impeller 31 and a motor
(not shown). The impeller 31 is installed on the rotator 30 and
driven by the motor. As the rotator 30 is actuated, the impeller 31
thereon is synchronically rotated to produce airflow for heat
dissipation. Heat generated from the rotator 30 can be efficiently
dissipated to the exterior via the through holes 300.
[0007] In FIG. 2B, the fan motor 4 comprises a rotator 40 formed
with a plurality of through holes 400, an impeller 41, a frame 42
and a motor (not shown). Heat generated from the rotator 40 can
also be efficiently dissipated to the exterior via the through
holes 400 as the rotator 40 is actuated.
[0008] 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.
SUMMARY
[0009] The invention provides a heat-dissipation structure for a
motor to dissipate heat to the exterior and prevent particles from
entering therein.
[0010] 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.
[0011] 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.
[0012] 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.
[0013] 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 DRAWINGS
[0014] The invention can be more fully understood by reading the
subsequent detailed description and examples with references made
to the accompanying drawings, wherein:
[0015] FIG. 1A is a perspective view of a conventional centrifugal
fan motor.
[0016] FIG. 1B is another perspective view of a conventional
centrifugal fan motor.
[0017] FIG. 2A is another perspective view of a conventional
centrifugal fan motor.
[0018] FIG. 2B is another perspective view of a conventional
centrifugal fan motor.
[0019] FIG. 3A is a perspective view of a centrifugal fan motor
according to the invention.
[0020] FIG. 3B is a perspective view of a rotator of the
centrifugal fan motor of the invention.
[0021] FIG. 3C is a sectional view of the rotator of the
centrifugal fan motor of the invention.
[0022] FIG. 3D is an exploded view of a housing of the centrifugal
fan motor of the invention.
DETAILED DESCRIPTION
[0023] FIGS. 3A and 3B are two perspective views of a centrifugal
fan motor 5 of an embodiment of the invention, and FIG. 3C is a
sectional view of the centrifugal fan motor 5.
[0024] In FIG. 3A, the centrifugal fan motor 5 comprises a rotator
50, an impeller 51 and a seat 55. In FIG. 3C, the rotator 50 is
coupled to the seat 55 by a shaft 56, and the impeller 51 surrounds
the rotator 50. Thus, the impeller 51 rotates with the rotator 50,
forming an active airflow to dissipate heat generated from a heat
source (not shown). The rotator 50 comprises a cover 501, at least
a guiding blade 502 and a housing 505. In this embodiment, the
housing 505 in rounded and cylindrical. It is to be understood that
the invention is not limited thereto the disclosed embodiments. The
housing 505 can be formed by any desired sectional shapes. A
central region of an inner side of the housing 505 is substantially
connected to the shaft 56, and at least one through hole 500 is
formed on a bottom of the housing 505. In this embodiment, the
bottom of the housing 505 comprises a plurality of through holes
500. The cover 501 is connected to an exterior of the bottom of the
housing 505, and a distance "d" is formed between the cover 501 and
the housing 505. In the embodiment, the cover 501 is connected to
the exterior of the bottom of the housing 505 via a plurality of
guiding blades 502 arranged radially and outwardly and with respect
to the center of the shaft 56. In other embodiments, a bar (not
shown) or the like can be used to connect the cover 501 to the
exterior of the bottom of the housing 505. Another embodiments, the
shaft 56 is connected to the cover 501 directly (not shown), and
the cover 501 is connected to the housing 505 via a plurality of
guiding blades 502. The guiding blade 502 can be a flat plate (FIG.
3D) or an arc plate (not shown in FIGS.). The size of the cover 501
is designed to be large enough to overlap all through holes 500
formed on the bottom of the housing 505.
[0025] 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 FIG. 3C. The flow rate of
airflow at the exterior of the housing 505 is larger than the flow
rate of airflow inside of the housing 505. It is understood that
airflow inside of the housing 505 is expelled to the exterior of
the housing 505 from the through hole 500 via the distance "d"
based on the Bernoulli's Principle. Also, a heat generated in the
housing 505 is expelled to the exterior in the same way in a
direction 61 of FIGS. 3B and 3C.
[0026] 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.
[0027] In FIG. 3D, a housing 505' of an embodiment comprises a
first part 506 and a second part 507 connected to the first part
506. In other embodiments, the rotator 50 can be integrally formed
into a single piece. The inner side of the first part 506 is
connected to the shaft 56, and the through holes 500 are formed on
a bottom of the first part 506, and the second part 507 is
connected to the cover 501 via the guiding blades 502. The guiding
blades 502 are connected to an edge of the cover 501 to form a
distance is formed between the cover 501 and the second part 507,
so that the assembled first part 506 and second part 507 of the
housing 505' still has the same effect as the housing 505.
[0028] 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).
[0029] 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.
* * * * *