U.S. patent application number 13/845761 was filed with the patent office on 2013-10-03 for impeller and fan.
This patent application is currently assigned to ASUSTEK COMPUTER INC.. The applicant listed for this patent is ASUSTEK COMPUTER INC.. Invention is credited to Yung-Ching HUANG.
Application Number | 20130259667 13/845761 |
Document ID | / |
Family ID | 47913077 |
Filed Date | 2013-10-03 |
United States Patent
Application |
20130259667 |
Kind Code |
A1 |
HUANG; Yung-Ching |
October 3, 2013 |
IMPELLER AND FAN
Abstract
An impeller applied to a fan is disclosed. The impeller includes
a hub, a plurality of centrifugal blades and a plurality of axial
blades. One end of each of the centrifugal blades is disposed
around the circumference of the hub. The axial blades are
respectively connected to the other end of a part of the
centrifugal blades. A fan applying the impeller is also
disclosed.
Inventors: |
HUANG; Yung-Ching; (Taipei,
TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
ASUSTEK COMPUTER INC. |
Taipei |
|
TW |
|
|
Assignee: |
ASUSTEK COMPUTER INC.
Taipei
TW
|
Family ID: |
47913077 |
Appl. No.: |
13/845761 |
Filed: |
March 18, 2013 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
61617875 |
Mar 30, 2012 |
|
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Current U.S.
Class: |
415/185 |
Current CPC
Class: |
F04D 17/025 20130101;
F04D 25/06 20130101; F04D 19/002 20130101 |
Class at
Publication: |
415/185 |
International
Class: |
F04D 19/00 20060101
F04D019/00 |
Claims
1. An impeller applied to a fan, comprising: a hub; a plurality of
centrifugal blades, wherein one end of each of the centrifugal
blades is disposed around circumference of the hub; and a plurality
of axial blades, wherein the other end of a part of the centrifugal
blades is connected to the axial blades, respectively.
2. The impeller according to claim 1, wherein the number of the
axial blades is less than or equals to the number of the
centrifugal blades.
3. The impeller according to claim I, wherein each of the
centrifugal blades and the connected axial blades are integrally
formed.
4. The impeller according to claim 1, wherein the hub, the
centrifugal blades and the axial blades are integrally formed.
5. The impeller according to claim 1, wherein the other end of the
centrifugal blades is respectively connected to a connecting
element.
6. An impeller applied to a fan, comprising: a hub; and a plurality
of composite blades disposed around circumference of the hub,
wherein each of the composite blades extends from the hub and
includes a centrifugal part and an axial part in sequence.
7. The impeller according to claim 6, wherein the impeller further
includes: a plurality of centrifugal blades staggerly disposed with
the composite blades.
8. The impeller according to claim 6, wherein the hub and the
composite blades are integrally formed.
9. The impeller according to claim 6, wherein the impeller further
includes: a connecting clement connected to the centrifugal part or
a connecting part between the centrifugal part and the centrifugal
part.
10. A fan, comprising: an impeller comprising: a hub, a plurality
of centrifugal blades, wherein one end of each of the centrifugal
blades is disposed around circumference of the hub, and a plurality
of axial blades, wherein the other end of a part of the centrifugal
blades is connected to the axial blades, respectively; and a motor;
wherein the impeller is driven by the motor.
11. The fan according to claim 10, wherein the number of the axial
blades is less than or equals to the number of the centrifugal
blades.
12. The fan according to claim 10, wherein each of the centrifugal
blades and the connected axial blades are integrally formed.
13. The fan according to claim 10, wherein the hub, the centrifugal
blades and the axial blades are integrally formed.
14. The fan according to claim 10, wherein the other end of the
centrifugal blades is respectively connected to a connecting
element.
15. A fan, comprising: an impeller comprising: a hub, and a
plurality of composite blades disposed around circumference of the
hub, wherein each of the composite blades extends from the hub and
includes a centrifugal part and an axial part in sequence; and a
motor; wherein the impeller is driven by the motor
16. The fan according to claim 15, wherein the impeller further
includes: a plurality of centrifugal blades staggerly disposed with
the composite blades.
17. The fan according to claim 15, wherein the hub and the
composite blades are integrally formed.
18. The fan according to claim 15, wherein the impeller further
includes: a connecting element connected to the centrifugal part or
a connecting part between the centrifugal part and the centrifugal
part.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] The non-provisional patent application claims priority to
U.S. provisional patent application with Ser. No. 61/617,875, filed
on Mar. 30, 2012. This and all other extrinsic materials discussed
herein are incorporated by reference in their entirety.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The invention relates to an impeller and a fan and, more
particularly, to an impeller including centrifugal blades connected
with axial blades, and a fan applying the impeller.
[0004] 2. Description of the Related Art
[0005] As electronic products develop high performance, high
frequency, high speed and become lighter and thinner, they generate
more heat, which makes them unstable and affects reliability and
use life. Since a fan has a low cost and mature technology, an
electronic device usually uses a fan to dissipate heat.
[0006] Taking a graphics card as an example, most of the graphics
cards use the conventional fan (such as an axial fan or a
centrifugal fan) to dissipate heat. However, the fan is disposed
too close to the circuit board of the graphics card and causes
problems, such as low efficiency and big noise, Moreover, it is
difficult to consider both air pressure and air quantity of the fan
at the same time, and air flow direction from the fan may be not
suitable for the graphics card, which affects heat dissipating
efficiency.
BRIEF SUMMARY OF THE INVENTION
[0007] An impeller and a fan which have wide air flow directions,
low noise, long using life and can improve heat dissipating
efficiency are disclosed.
[0008] An impeller is applied to a fan. The impeller includes a
hub, a plurality of centrifugal blades and a plurality of axial
blades. One end of each of the centrifugal blades is disposed
around circumference of the hub, and the other end of a part of the
centrifugal blades is connected to the axial blades,
respectively.
[0009] An impeller is applied to a fan. The impeller includes a hub
and a plurality of composite blades disposed around circumference
of the hub. Each of the composite blades extends from the hub and
includes a centrifugal part and a centrifugal part in sequence.
[0010] A fan includes an impeller above-mentioned and a motor,
wherein the motor is used for driving the impeller.
[0011] As stated above, the impeller and the fan are disclosed. The
composite blade is disposed in the impeller (one end of the
centrifugal blades is connected to the axial blades, or the
centrifugal part is connected to the centrifugal part), which makes
the air flow of the fan or the heat dissipating device wider,
lowers noise, extends the using life of the motor and improves the
heat dissipating efficiency of the heat dissipating device.
[0012] These and other features, aspects and advantages of the
present invention will become better understood with regard to the
following description, appended claims, and accompanying
drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] FIG. 1A and FIG. 1B are an explosion diagram and an assembly
diagram showing a fan in a first embodiment;
[0014] FIG. 2A and FIG. 2B are an explosion diagram and an assembly
diagram showing a fan in a second embodiment;
[0015] FIG. 3 is a schematic diagram showing air flow direction of
a fan;
[0016] FIG. 4A and FIG. 4B are an explosion diagram and an assembly
diagram showing a heat dissipating device in a third embodiment;
and
[0017] FIG. 5A and FIG. 5B are an explosion diagram and an assembly
diagram showing a heat dissipating device in a fourth
embodiment.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0018] An impeller, a fan and a heat dissipating device are
illustrated with relating figures, and the same symbols denote the
same components.
[0019] FIG. 1A and FIG. 1B are an explosion diagram and an assembly
diagram showing a fan 1 in a first embodiment.
[0020] The fan 1 includes an impeller 11 and a motor 12. The motor
12 drives the impeller 11 to rotate.
[0021] The impeller 11 includes a hub 111, a plurality of the
centrifugal blades 112 and a plurality of the axial blades 113. The
fan 1 includes the centrifugal blades 112 and the axial blades 113
to form composite blades, and thus the fan 1 can also be regarded
as a composite fan. Furthermore, since an even number of blades may
make the fan unstable in operating, the number of the blades is
odd, such as nine axial blades 113 in FIG. 1A and FIG. 1B, which is
not limited herein.
[0022] The centrifugal blades 112 are disposed around the
circumference of the hub 111. As shown in FIG. 1A, the axial blades
113 are connected to one end 114 of the centrifugal blades 112 away
from the hub 111, respectively. The number of the axial blades 113
can be less than that of the centrifugal blades 112 (the number of
the axial blades 113 is half of that of the centrifugal blades 112,
which is not limited herein), and the axial blades 113 are smoothly
connected to the centrifugal blades 112 to form the composite
blades.
[0023] The number of the axial blades 113 may also equal to that of
the centrifugal blades 112, that is, each of the axial blades 113
is connected to one end 114 of one of the centrifugal blades 112.
The impeller 11 may be manufactured by injection molded, and may be
made of metal (such as aluminum or aluminum magnesium alloy) or
plastic, which is not limited herein.
[0024] The centrifugal blades 112 and the connected axial blades
113 are integrally formed, or the huh 111, the centrifugal blades
112 and the axial blades 113 are integrally formed. In the
embodiment, the hub 111, the centrifugal blades 112 and the axial
blades 113 are integrally formed to improve the strength of the
impeller 11. Moreover, the length of the centrifugal blades 112 may
be increased to enhance centrifugal effect (that is increasing the
air quantity and the air pressure of the centrifugal blades
112).
[0025] The motor 12 includes a rotor (such as a magnet ring) 121, a
stator 122, a spindle 123 and a base 124. The spindle 123 is
connected to the hub 111 and passes through the axle tube 125 at
the base 124. The stator 122 is sleeved on the axle tube 125, and
the rotor 121 is disposed in inner peripheral of the hub 111
corresponding to the stator 122. When a coil of the stator 122 is
power on, it generates electromagnetic induction with the rotor
121, drives the spindle 123 and the rotor 121 to rotate, and
further drives the impeller 11 to rotate. Since the motor 12 is
known by persons with ordinary skill in the art, description of the
motor 12 is omitted herein.
[0026] The impeller 11 further includes a connecting element 115.
The connecting element 115 is connected to the connecting part
(which is the end 114) between the centrifugal blades 112 and the
axial blades 113. The connecting element 115 can strengthen the
whole structure of the impeller 11 and resist air pressure to
prevent the impeller 11 from deforming. The connecting element (not
shown) may be only connected to the centrifugal blades 112 to
achieve the same functions.
[0027] FIG. 2A and FIG. 2B are an explosion diagram and an assembly
diagram showing a fan 2 in a second embodiment.
[0028] The fan 2 includes an impeller 21 and a motor 22, and the
motor 22 drives the impeller 21 to rotate.
[0029] The impeller 21 includes a hub 211 and a plurality of
composite blades 212 disposed around the circumference of the hub
211. Each of the composite blades 212 extends from the hub 211 and
includes a centrifugal part C and an axial part A in sequence. The
centrifugal part C means that the composite blades 212 at the part
is shaped in the centrifugal blades, and the axial part A means
that the composite blades 212 at the part is shaped in the axial
blades. Moreover, the number of the centrifugal part C equals to
that of the axial part A, and the hub 211 and the composite blades
212 are integrally formed to strengthen the impeller 21.
[0030] The motor 22 includes a rotor (such as a magnet ring) 221, a
stator 222, a spindle 223 and a base 224. The structure and the
operating principle of the motor 22 are illustrated above, which is
omitted herein.
[0031] The impeller 21 further includes a connecting element 215
which is connected to a connecting part 214 between the centrifugal
part C and the axial part A. The connecting element 215 can
strengthen the whole structure of the impeller 21 and resist air
pressure to prevent the impeller 21 from deforming. The connecting
element (not shown) may be only connected to the centrifugal part C
to achieve the same functions.
[0032] FIG. 3 is a schematic diagram showing air flow direction of
the fan 1 and the fan 2. The direction of arrows in a full line
indicates air inflow direction, and the direction of arrows in a
dotted line indicates air outflow direction.
[0033] The composite blades of the fan 1 and 2 are combinations of
the centrifugal blades and the axial blades (or the centrifugal
part and the centrifugal part). As shown in FIG. 3, the fan 1 or 2
has six air inflow directions (as shown in arrows in a full line)
at the upper side and the bottom side, and the air flows out
through the sides and flows downwards, which makes the fan 1 and
the fan 2 have wide air flow directions, low noise, long using life
of the motor and better heat dissipating efficiency.
[0034] FIG. 4A and FIG. 4B are an explosion diagram and an assembly
diagram showing a heat dissipating device 3 in a third
embodiment.
[0035] The heat dissipating device 3 includes a fan 1 and a heat
dissipater 4. The heat dissipater 4 is disposed corresponding to
the fan 1. The heat dissipater 4 may be disposed at one side of the
fan 1 (not shown). The heat dissipater 4 may also be disposed
around the circumference of the fan 1 (as shown in FIG. 4B). The
heat dissipater 4 is a set of heat dissipating fins, which is not
limited herein. In the embodiment, the heat dissipater 4 is an
annular set of heat dissipating fins, and a part of the heat
dissipating fins are disposed around the circumference of the fan
1, and the other part of the heat dissipating fins are disposed at
the bottom of the fan 1.
[0036] The structure and the operating principle of the fan 1 are
illustrated above, which is omitted herein.
[0037] FIG. 5A and FIG. 5B are an explosion diagram and an assembly
diagram showing a heat dissipating device 5 in a fourth
embodiment.
[0038] The heat dissipating device 5 includes a fan 2 and a heat
dissipater 4. Comparing to the heat dissipating device 3, the
difference is that the heat dissipater 4 cooperates with the fan 2,
and other structures and the operating principle are the same as
that in the third embodiment, which is omitted herein.
[0039] The heat dissipating devices 3 and 5 use the fans 1 and 2,
respectively, and the composite blades of the fans 1 and 2 are
combinations of the centrifugal blades and the axial blades (or
combination of the centrifugal part and the centrifugal part).
Please refer to FIG. 3, FIG. 4B and FIG. 5B, when the fans 1 and 2
including the composite blades operate, cool air flows in the heat
dissipater 4 in six directions (as shown in the full line arrows in
FIG. 3), and hot air flows out in the directions shown in the
dotted line, so as to dissipate heat.
[0040] When air flows out of the composite blades, it can flow
downwards through the sides. Thus, the heat dissipating devices 3
and 5 have six air inflow directions, and the air flows out through
the sides and downwards, which increases the air quantity flowing
through the heat dissipater 4, and makes the heat dissipating
devices 3 and 5 have wide air flow directions, low noise, long
using life of the motor and better heat dissipating efficiency.
[0041] When the heat dissipating devices 3 and 5 are disposed above
a printed circuit board (PCB) of the graphics card, the heat
dissipating devices 3 and 5 can reduce the temperature of the
graphics card by three degrees comparing to the conventional heat
dissipating device.
[0042] Since the air flows downwards through the sides of the
composite blades, heat from peripheral electronic elements near the
heat dissipating devices 3 and 5 can also be dissipated.
[0043] Moreover, as persons with ordinary skills in the art know,
when the motors 12 and 22 reverse operating, the six air inflow
directions become six air outflow directions, and the air flows in
through the sides, which broadens the air flow directions, lowers
the noise, extends the using life and improves the heat dissipating
efficiency.
[0044] Although the present invention has been described in
considerable detail with reference to certain preferred embodiments
thereof, the disclosure is not for limiting the scope. Persons
having ordinary skill in the art may make various modifications and
changes without departing from the scope. Therefore, the scope of
the appended claims should not be limited to the description of the
preferred embodiments described above.
* * * * *