U.S. patent application number 15/048164 was filed with the patent office on 2017-08-24 for combined fan and cooling device using the same.
The applicant listed for this patent is CHAUN-CHOUNG TECHNOLOGY CORP.. Invention is credited to Shih-Lun Chiu, Chin-Hsiung HUANG, Meng-Cheng HUANG, Tang-Yi YEH.
Application Number | 20170241430 15/048164 |
Document ID | / |
Family ID | 59629303 |
Filed Date | 2017-08-24 |
United States Patent
Application |
20170241430 |
Kind Code |
A1 |
HUANG; Meng-Cheng ; et
al. |
August 24, 2017 |
COMBINED FAN AND COOLING DEVICE USING THE SAME
Abstract
A combined fan for cooling a heat source includes a hub and
multiple blades. The hub has a first side and a second side
opposite to each other. The blades are distributed along an outer
circumferential surface of the hub, and each of the blades includes
a first part extending from the hub and a second part connected to
the first part. Each of the second parts protrudes beyond the first
side or the second side, and each of the second parts is formed by
multiple strip structures. Therefore, each of the strip structures
can be closer to a surface of the heat source to dissipate the heat
more effectively.
Inventors: |
HUANG; Meng-Cheng; (NEW
TAIPEI CITY, TW) ; HUANG; Chin-Hsiung; (NEW TAIPEI
CITY, TW) ; YEH; Tang-Yi; (NEW TAIPEI CITY, TW)
; Chiu; Shih-Lun; (NEW TAIPEI CITY, TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
CHAUN-CHOUNG TECHNOLOGY CORP. |
NEW TAIPEI CITY |
|
TW |
|
|
Family ID: |
59629303 |
Appl. No.: |
15/048164 |
Filed: |
February 19, 2016 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F05D 2300/614 20130101;
F05D 2300/501 20130101; F04D 29/582 20130101; F04D 29/281 20130101;
F04D 29/023 20130101; F05D 2260/221 20130101; F04D 29/30
20130101 |
International
Class: |
F04D 29/30 20060101
F04D029/30; F04D 29/58 20060101 F04D029/58; F04D 29/42 20060101
F04D029/42; F04D 29/02 20060101 F04D029/02; F04D 29/28 20060101
F04D029/28 |
Claims
1. A combined fan, comprising: a hub including a first side and a
second side opposite to each other; and a plurality of blades, each
of the blades being distributed along an outer circumferential
surface of the hub, each of the blades including a first part
extending from the hub and a second part connected to the first
part, wherein each of the second parts protrudes beyond the first
side or the second side, and each of the second parts is formed by
a plurality of strip structures.
2. The combined fan of claim 1, wherein the material of each of the
strip structures includes graphite or metal.
3. The combined fan of claim 1, wherein each of the first parts is
of greater rigidity than the rigidity of each of the second
parts.
4. The combined fan of claim 1, wherein each of the first parts is
integrally formed with each of the second parts.
5. The combined fan of claim 1, wherein each of the second parts
and each of the first parts are formed by an insert-molding
method.
6. The combined fan of claim 1, further comprising a plurality of
brush devices, each of the brush devices being combined with each
of the second parts and fixedly attached to one side surface of
each of the blades.
7. The combined fan of claim 6, wherein each of the brush devices
further includes a joining portion for combining and fixing each of
the strip structures.
8. A cooling device for cooling a heat source, comprising: a
combined fan including: a hub having a first side and a second side
opposite to each other; and a plurality of blades, each of the
blades being distributed along an outer circumferential surface of
the hub, and each of the blades including a first part extending
from the hub and a second part connected to the first part, wherein
each of the second parts protrudes beyond the first side or the
second side, and each of the second parts is formed by a plurality
of strip structures; and a housing receiving the combined fan, each
of the second parts being disposed toward the heat source.
9. The cooling device of claim 8, wherein the material of each of
the strip structures includes graphite or metal.
10. The cooling device of claim 8, wherein each of the first parts
is of greater rigidity than the rigidity of each of the second
parts.
11. The cooling device of claim 8, wherein each of the first parts
is integrally formed with each of the second parts.
12. The cooling device of claim 8, wherein each of the second parts
and each of the first parts are formed by an insert-molding
method.
13. The cooling device of claim 8 further including a plurality of
brush devices, and each of the brush devices being combined with
each of the second parts and fixedly attached to one side surface
of each of the blades.
14. The cooling device of claim 13, wherein each of the brush
devices further includes a joining portion for combining and fixing
each of the strip structures.
15. The cooling device of claim 8, wherein the housing includes a
first outer case, a second outer case covering the first outer
case, and an air outlet, the first outer case has a suspension
shaft and at least one air inlet, the at least one air inlet is in
a direction perpendicular or corresponding to the direction of the
air outlet.
16. The cooling device of claim 8, wherein one side surface of the
housing is attached to a surface of the heat source, each of the
strip structures is in contact with or in non-contact with the
housing or the surface of the heat source, when each of the strip
structures is in non-contact with the housing or the surface of the
heat source, a gap is formed between each of the strip structures
and the housing or between each of the strip structures and the
surface of the heat source.
Description
TECHNICAL FIELD
[0001] The present invention relates to a fan and a cooling device
using the same and, in particular, to a combined fan and a cooling
device using the same while combining strip structures to be closer
to a heat source.
BACKGROUND
[0002] With the development in the electronic industry, the
electronic component has enhanced performance and the chip set
inside provides a faster computing speed. Due to the increase in
the computing speed and the increase in the number of chips, the
amount of heat generated by the chips during operation also
increases. If the heat is not dissipated away in time, it will
greatly compromise the performance of the electronic component and
lower the computing speed of the electronic component. Moreover,
the heat accumulation can result in malfunction and damage of the
electronic component, so heat dissipation is required for the
electronic component.
[0003] In a desktop computer or a notebook which has a limited
installation space, a fan device is usually installed near the
electronic component. The airflow generated by rotation of the
blades in the fan device directly blows to the electronic component
or to the heat sink installed on the electronic component to
thereby dissipate heat. The conventional fan structure normally
includes a hub and multiple blades extending outward linearly from
the hub. The blades are disposed tilted along the same rotation
direction. The magnitude of the airflow generated by the fan device
depends on the rotation speed of the blades and also depends on the
swept area and the angle of the blades.
[0004] However, the conventional design in the swept area and the
angle of the blades cannot improve the heat dissipation
effectively. Accordingly, the inventor made various studies to
solve the above-mentioned problems, on the basis of which the
present invention is accomplished.
SUMMARY
[0005] It is an object of the present invention to provide a
combined fan and a cooling device using the same, wherein strip
structures are incorporated in order to be closer to a surface of
the heat source to thereby dissipate the heat more effectively.
[0006] Accordingly, the present invention provides a combined fan
for cooling a heat source. The combined fan comprises a hub and
multiple blades. The hub has a first side and a second side
opposite to each other. The blades are distributed along an outer
circumferential surface of the hub, and each of the blades includes
a first part extending from the hub and a second part connected to
the first part, wherein each of the second parts protrudes beyond
the first side or the second side, and each of the second parts is
formed by a plurality of strip structures.
[0007] Accordingly, the present invention provides a cooling device
for cooling a heat source, comprising the combined fan of the
foregoing embodiment and a housing. The housing receives the
combined fan, and each of the second parts is disposed toward the
heat source.
[0008] The present invention further has the following features.
Each of the blades is closer to the heat source by utilizing the
feature that the second part (i.e. the strip structures) has better
flexibility than the first part, so that the waste heat of the heat
source can be dissipated away more effectively. The strip
structures can be independently attached to and protrude beyond one
side surface of each of the blades (i.e. the first part), or the
strip structures can be combined with a joining portion to become a
brush device which can be assembled to the side surface of each of
the blades easily and conveniently.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] The disclosure will become more fully understood from the
detailed description and the drawings given herein below for
illustration only, and thus does not limit the disclosure,
wherein:
[0010] FIG. 1 is a perspective view illustrating a combined fan
according to the first embodiment of the present invention;
[0011] FIG. 2 is a perspective view illustrating the combined fan
according to another embodiment of the present invention;
[0012] FIG. 3 is a perspective exploded view of the present
invention, illustrating that the combined fan of the first
embodiment is used in a cooling device;
[0013] FIG. 4 is a cross-sectional view of the present invention,
illustrating that the combined fan of the first embodiment is used
in the cooling device;
[0014] FIG. 5 is a perspective exploded view of the present
invention, illustrating that the combined fan of a second
embodiment is used in the cooling device; and
[0015] FIG. 6 is a perspective view illustrating the combined fan
according to still another embodiment of the present invention.
DETAILED DESCRIPTION
[0016] Detailed descriptions and technical contents of the present
invention are illustrated below in conjunction with the accompany
drawings. However, it is to be understood that the descriptions and
the accompany drawings disclosed herein are merely illustrative and
exemplary and not intended to limit the scope of the present
invention.
[0017] Referring to FIG. 1 and FIG. 2, the present invention
provides a combined fan 100 comprising a hub 110 and a plurality of
blades 150. The hub 110 has a first side 120 and a second side 130
opposite to each other. The blades 150 are distributed
equidistantly or not along an outer circumferential surface 140 of
the hub 110, and each of the blades 150 includes a first part 160
extending from the hub 110 and a second part 170 connected to the
first part 160, wherein each of the second parts 170 protrudes
beyond the first side 120 or the second side 130, and each of the
second parts 170 is preferably formed by a plurality of strip
structures 180.
[0018] In the present embodiment, each of the blades 150 is
preferably arranged at an angle and extends linearly toward the
same rotation direction, for being applied in a centrifugal flow
fan. Alternatively, each of the blades 150 can be curved outwardly
from the outer circumferential surface 140 of the hub 110, for
being applied in, for example, an axial flow fan, as shown in FIG.
4. However, in other different embodiments, the blades 150 can be
arranged radially or can extend curvedly or can be blades in other
forms; the present invention is not limited in this regard.
[0019] In the embodiment shown in FIGS. 1 and 2, the hub 110
includes a rotation shaft 112 and a recess 114. One end of the
rotation shaft 112 is preferably connected to a bottom of the
second side 130 and is disposed in the center of the recess 114.
Therefore, each of the second parts 170 preferably protrudes in a
direction opposite to the direction in which the recess 114 opens,
i.e. protruding outwardly beyond the second side 130. However, in
another embodiment, one end of the rotation shaft 112 can be
connected to a bottom of the first side 120, so that the second
part 170 protrudes outwardly beyond the first side 120; the
configuration may vary as required.
[0020] Furthermore, the material of each of the strip structures
180 of each second part 170 preferably includes, but is not limited
to, graphite, metal or other flexible heat-conductive material. The
shape of each strip structure 180 can be, but not limited to, a
fiber or a wire, e.g. a graphite fiber, a copper wire, an aluminum
wire, or an alloy wire thereof. Each of the first parts 160, which
is part of the body of the combined fan 100, is of greater rigidity
than the rigidity of each of the second parts 170. That is to say,
each of the second parts 170 is of greater flexibility than each of
the first parts 160, so the strip structure 180 changes shape with
respect to the first part 160, thereby increasing a swept area and
enhancing the wind blowing effect.
[0021] The embodiment shown in FIG. 1 further includes a plurality
of brush devices 190, and each of the brush devices 190 is combined
with each of the second parts 170 and fixedly attached to one side
surface of each of the blades 150. Each of the brush devices 190
further includes a joining portion 192 for combining and fixing
each of the strip structures 180, and the joining portion 192 is
made from the same or a different metal material from the material
of each strip structure 180. To accelerate heat dissipation, each
of the first parts 160 and each of the brush devices 190 can be
made from the same or a different heat-conductive material, such as
copper, silver, aluminum, or alloy thereof the material may vary as
required. However, in the embodiment shown in FIG. 2, each of the
second parts 170 can also be directly fixedly attached to one side
surface of each of the blades 150; the configuration may vary as
required.
[0022] Furthermore, in another embodiment, each of the first parts
160 is integrally formed with each of the second parts 170.
Alternatively, in still another embodiment, each of the second
parts 170 and each of the first parts 160 can be formed by an
insert-molding method; this may vary as required.
[0023] Please refer to FIGS. 3 and 4 which are a perspective
exploded view and a cross-sectional view of the present invention,
illustrating that the combined fan is used in the cooling device
according to the first embodiment. As shown in the drawings, the
present invention further provides a cooling device 200 for cooling
a heat source 210. The cooling device 200 comprises a combined fan
100 of the foregoing embodiment and a housing 220. The housing 220
receives the combined fan 100, and each of the second parts 170 is
disposed toward the heat source 210.
[0024] In the present embodiment, the housing 220 is preferably
made from metal having good heat conductivity, such as iron,
aluminum or alloy thereof. The housing 220 includes a first outer
case 230 and a second outer case 240 covering the first case 230.
The first outer case 230 has a suspension shaft 250 and at least
one air inlet 260. When the first outer case 230 covers the second
outer case 240, an air outlet 270 is formed at one side of the
housing 220, so the at least one air inlet 260 is in a direction
perpendicular or corresponding to the direction of the air outlet
270, and accordingly the combined fan 100 in the present embodiment
is preferably a centrifugal flow fan.
[0025] The hub 110 of the combined fan 100 has a rotation shaft
112, for assembly with the suspension shaft 250 and has a recess
114 for accommodating a stator (not illustrated). One end of the
rotation shaft 112 is preferably connected to a bottom of the
second side 130 and is disposed in the center of the recess 114, so
the combined fan 100 rotates about the suspension shaft 250 as
center with respect to the housing 220.
[0026] Referring to FIG. 4, when the cooling device 200 is in
contact with a surface of the heat source 210 electrically
connected to a circuit board 212, the second outer case 240 is in
contact with the surface of the heat source 210, and each of the
second parts 170 (i.e. the strip structures 180) is disposed toward
the heat source 210. When the cooling device 200 is in operation,
the centrifugal flow fan 100 not only provides airflow generated by
rotation of the blades 150, but also dissipates away the waste heat
from the air outlet 270 more quickly and effectively by disposing
the strip structures 180 in a manner closest to the heat source
210.
[0027] In the present embodiment, each of the second parts 170 is
preferably not in contact with an inner surface of the second outer
case 240 of the housing 220, i.e there is a very tiny gap D between
each strip structure 180 and the inner surface of the second outer
case 240. Therefore, each strip structure 180 does not contact the
inner surface of the second outer case 240, thereby preventing
noises, abrasion or other interference. However, in other
embodiment, since each second part 170 can be made from a soft
material, so each second part 170 can contact the inner surface of
the second outer case 240 of the housing 220 to achieve the same
effect mentioned above.
[0028] Please refer to FIG. 5 which is a perspective exploded view
of the present invention, illustrating that the combined fan is
used in the cooling device according to the second embodiment. In
the present embodiment, the single one housing 220 includes at
least one air inlet 260 and an air outlet 270, wherein the air
outlet 270 is disposed corresponding to the at least one air inlet
260, so the combine fan 100 having the curved blades 150 can be
assembled onto the suspension shaft 250 of the housing 220 via the
air outlet 270. In the present embodiment, the combined fan 100 is
preferably an axial flow fan.
[0029] When the cooling device 200 of the present embodiment is
disposed close to the surface of the heat source (not illustrated),
each strip structure 180 is disposed more directly toward the heat
source. Similarly, when the cooling device 200 is in operation,
each strip structure 180 of the axial flow fan 100 is disposed in a
manner closest to the surface of the heat source so as to dissipate
away the waste heat of the heat source from the air outlet 270,
thereby enhancing heat dissipation.
[0030] Furthermore, in the embodiment shown in FIG. 5, there is a
very tiny gap D between each second part 170 and the heat source
(not illustrated), so each strip structure 180 does not contact the
surface of the heat source, thereby avoiding noises or abrasion.
Certainly, in other embodiment, since each of the second parts 170
is made from a soft material, so each second part 170 can also
contact the surface of the heat source; this may vary as
required.
[0031] Please refer to FIG. 6 which is a perspective view
illustrating the combined fan according to still another embodiment
of the present invention. As shown in FIG. 6, besides being
disposed toward the heat source, the second part 170 can also be
disposed at an outer edge of the first part 160. The second part
170 is combined with the first part 160 by an insert-molding
method. Other descriptions relating to the structure and connection
relationship of the second part 170 according to the present
embodiment are provided above, and thus are not repeated
herein.
[0032] Each of the blades 150 can be closer to the heat source 210
by utilizing the feature that each second part 170 (i.e. the strip
structures 180) has better flexibility than the first part 160, so
that the waste heat of the heat source 210 can be dissipated away
more effectively. Furthermore, the strip structures 180 can be
independently attached to and protrude from one side surface of
each of the blades 150 (i.e. the first part 160), or the strip
structures 180 can be combined with a joining portion 192 to become
a brush device 190 which can be assembled to the side surface of
each of the blades 150 more easily and conveniently.
[0033] It is to be understood that the above descriptions are
merely the preferable embodiments of the present invention and are
not intended to limit the scope of the present invention.
Equivalent changes and modifications made in the spirit of the
present invention are regarded as falling within the scope of the
present invention.
* * * * *