U.S. patent application number 13/343240 was filed with the patent office on 2013-07-04 for axial flow fan blade structure and axial flow fan thereof.
The applicant listed for this patent is Ming-ju Chen. Invention is credited to Ming-ju Chen.
Application Number | 20130170995 13/343240 |
Document ID | / |
Family ID | 48694939 |
Filed Date | 2013-07-04 |
United States Patent
Application |
20130170995 |
Kind Code |
A1 |
Chen; Ming-ju |
July 4, 2013 |
AXIAL FLOW FAN BLADE STRUCTURE AND AXIAL FLOW FAN THEREOF
Abstract
An axial flow fan blade structure and an axial flow fan thereof.
The axial flow fan blade structure includes a fan impeller and an
annular body. The fan impeller has a hub and multiple blades. Each
blade has a first flow guide face and a second flow guide face
opposite to the first flow guide face. The annular body is disposed
on the blades. The annular body outward extends from the first and
second flow guide faces and is annularly connected with the blades
along the blades. The annular body not only is able to increase the
strength of the blades of the axial flow fan, but also is able to
reduce vibration and noise made by the axial flow fan.
Inventors: |
Chen; Ming-ju; (Shenzhen
City, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Chen; Ming-ju |
Shenzhen City |
|
CN |
|
|
Family ID: |
48694939 |
Appl. No.: |
13/343240 |
Filed: |
January 4, 2012 |
Current U.S.
Class: |
416/193R |
Current CPC
Class: |
F04D 29/668 20130101;
F04D 29/388 20130101; F04D 29/326 20130101; F04D 19/002
20130101 |
Class at
Publication: |
416/193.R |
International
Class: |
F01D 5/22 20060101
F01D005/22 |
Claims
1. An axial flow fan blade structure comprising: a fan impeller
having a hub and multiple blades annularly arranged along a
circumference of the hub, each blade having a first flow guide face
and a second flow guide face opposite to the first flow guide face;
and an annular body disposed on the blades, the annular body
outward extending from the first and second flow guide faces and
being annularly connected with the blades along the blades.
2. The axial flow fan blade structure as claimed in claim 1,
wherein the annular body has multiple connection sections and
multiple protrusion sections, the connection sections being
connected between the adjacent blades, the protrusion sections
outward extending and protruding from the first and second flow
guide faces, two sides of each protrusion section extending to
respectively connect with two adjacent connection sections to form
the annular body.
3. The axial flow fan blade structure as claimed in claim 1,
wherein each blade has a front section, a middle section and a rear
section, the rear section being fixedly connected to the
circumference of the hub, the middle
4. The axial flow fan blade structure as claimed in claim 3,
wherein the annular body is disposed between the front sections and
the rear sections of the blades.
5. The axial flow fan blade structure as claimed in claim 3,
wherein the annular body is selectively disposed on the front
sections of the blades or the rear sections of the blades.
6. The axial flow fan blade structure as claimed in claim 1,
wherein the annular body is integrally formed on the blades by
injection molding.
7. An axial flow fan comprising: a frame body having a receiving
space and a shaft seat disposed at a center of the receiving space;
a fan impeller rotatably assembled with the shaft seat, the fan
impeller having a hub and multiple blades annularly arranged along
a circumference of the hub, each blade having a first flow guide
face and a second flow guide face opposite to the first flow guide
face; and an annular body disposed on the blades, the annular body
outward extending from the first and second flow guide faces and
being annularly connected with the blades along the blades.
8. The axial flow fan as claimed in claim 7, wherein the annular
body has multiple connection sections and multiple protrusion
sections, the connection sections being connected between the
adjacent blades, the protrusion sections outward extending and
protruding from the first and second flow guide faces, two sides of
each protrusion section extending to respectively connect with two
adjacent connection sections to form the annular body.
9. The axial flow fan as claimed in claim 7, wherein each blade has
a front section, a middle section and a rear section, the rear
section being fixedly connected to the circumference of the hub,
the middle section outward extending from the rear section to
connect with the front section.
10. The axial flow fan as claimed in claim 9, wherein the annular
body is disposed between the front sections and the rear sections
of the blades.
11. The axial flow fan as claimed in claim 9, wherein the annular
body is selectively disposed on the front sections of the blades or
the rear sections of the blades.
12. The axial flow fan as claimed in claim 7, wherein the annular
body is integrally formed on the blades by injection molding.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates generally to an axial flow fan
blade structure and an axial flow fan thereof. The axial flow fan
blade structure includes a fan impeller and an annular body. The
annular body not only is able to increase the strength of the
blades of the axial flow fan, but also is able to reduce vibration
and noise made by the axial flow fan so as to enhance the fluid
efficiency of the axial flow fan.
[0003] 2. Description of the Related Art
[0004] Following the continuous advance and wide application of
sciences and techniques, there is a trend to real-time mass-process
data. To catch up with this trend, relevant manufacturers have
developed and released various high-frequency high-speed
processors. In company with the development of the processors, it
has become more and more critical how to solve heat dissipation
problem. In operation, a processor will generate high heat. In case
the heat is not dissipated in time, the temperature of the
processor will rise very quickly to deteriorate the performances of
the system or even cause security problem of the system. In
general, a heat dissipation device is used to dissipate the heat
generated by the processor so as to ensure normal operation of the
electronic components and prolong lifetime thereof.
[0005] As an example of the heat dissipation device, a conventional
axial flow fan includes a hub and multiple blades. The hub is
rotationally drivable by a motor to achieve the object of forced
heat dissipation.
[0006] The parameters, such as angle, number, thickness and radius,
of the blades of the axial flow fan will all affect the values of
wind pressure, air volume, noise, etc. of the axial flow fan. The
axial flow fan is mainly used to dissipate the heat generated by
the CPU, power supply and the like industrial products in a
computer. In order to enhance the heat dissipation effect, the
blades can be strengthened by many measures one of which is to
thicken the blades.
[0007] In the conventional axial flow fan, the thickness of the
blades can be increased to enhance the heat dissipation effect.
However, when doing this, a problem is raised. That is, after the
blades are thickened, the total fluid efficiency of the axial flow
fan is lowered. This will cause vibration and make more noises.
[0008] In order to eliminate the problems of vibration and noises
due to the thickened blades, the thickness of the blades can be
reduced. However, in this case, the rigidity of the blades will be
decreased to weaken the strength of the blades. In some more
serious situations, the blades may be even bent by the airflow in
operation and become useless. At the present time, the above
problems remain unsolved.
[0009] According to the above, the conventional axial flow fan has
the following shortcomings:
[0010] 1. The total fluid efficiency of the conventional axial flow
fan is lowered.
[0011] 2. The conventional axial flow fan is likely to vibrate and
make noises.
SUMMARY OF THE INVENTION
[0012] A primary object of the present invention is to provide an
axial flow fan blade structure including an annular body. The
annular body not only is able to increase the strength of the
blades of the axial flow fan, but also is able to enhance the fluid
efficiency of the axial flow fan.
[0013] A further object of the present invention is to provide the
above axial flow fan blade structure, which is able to reduce
vibration and noise made by the axial flow fan.
[0014] A still further object of the present invention is to
provide an axial flow fan including an annular body. The annular
body not only is able to increase the strength of the blades of the
axial flow fan, but also is able to enhance the fluid efficiency of
the axial flow fan.
[0015] A still further object of the present invention is to
provide the above axial flow fan, which is able to reduce vibration
and noise made by the axial flow fan.
[0016] To achieve the above and other objects, axial flow fan blade
structure of the present invention includes a fan impeller and an
annular body. The fan impeller has a hub and multiple blades
annularly arranged along a circumference of the hub. Each blade has
a first flow guide face and a second flow guide face opposite to
the first flow guide face. The annular body is disposed on the
blades. The annular body outward extends from the first and second
flow guide faces and being annularly connected with the blades
along the blades. By means of the annular body formed on the blades
of the axial flow fan, the strength of the blades is greatly
increased and the fluid efficiency of the axial flow fan is
enhanced. Also, the vibration and noise made by the blades can be
reduced.
[0017] The axial flow fan of the present invention includes a frame
body, a fan impeller and an annular body. The frame body has a
receiving space and a shaft seat disposed at a center of the
receiving space. The fan impeller is rotatably assembled with the
shaft seat. The fan impeller has a hub and multiple blades
annularly arranged along a circumference of the hub. Each blade has
a first flow guide face and a second flow guide face opposite to
the first flow guide face. The annular body is disposed on the
blades. The annular body outward extends from the first and second
flow guide faces and is annularly connected with the blades along
the blades. In operation of the axial flow fan, the annular body
not only is able to increase the strength of the blades, but also
is able to reduce vibration and noise made by the axial flow fan to
more effectively enhance the total air volume.
BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The structure and the technical means adopted by the present
invention to achieve the above and other objects can be best
understood by referring to the following detailed description of
the preferred embodiments and the accompanying drawings,
wherein:
[0019] FIG. 1 is a perspective view of a first embodiment of the
axial flow fan blade structure of the present invention;
[0020] FIG. 2 is a top view of the first embodiment of the present
invention in one aspect;
[0021] FIG. 3A is a top view of the first embodiment of the present
invention in another aspect;
[0022] FIG. 3B is a top view of the first embodiment of the present
invention in still another aspect;
[0023] FIG. 4A is a perspective exploded view of a second
embodiment of the present invention; and
[0024] FIG. 4B is a perspective assembled view of the second
embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0025] Please refer to FIG. 1, which is a perspective view of a
first embodiment of the axial flow fan blade structure of the
present invention. According to the first embodiment, the blade
structure 1 includes a fan impeller 10 and an annular body 11. The
fan impeller 10 has a hub 101 and multiple blades 102 annularly
arranged along a circumference of the hub 101. Each blade 102 has a
first flow guide face 1021 and a second flow guide face 1022
opposite to the first flow guide face 1021. The annular body 11 is
disposed on the blades 102. The annular body 11 outward extends
from the first and second flow guide faces 1021, 1022 and is
annularly connected with the blades 102 along the blades 102.
[0026] The annular body 11 has multiple connection sections 111 and
multiple protrusion sections 112. The connection sections 111 are
connected between the adjacent blades 102. The protrusion sections
112 outward extend and protrude from the first and second flow
guide faces 1021, 1022. Two sides of each protrusion section 112
extend to respectively connect with two adjacent connection
sections 111 to form the annular body 11. Through the annular body
11, the blades 102 are integrally connected with each other to
increase the strength of the blades 102. Moreover, the annular body
11 provides flow guide effect to reduce vibration and noise. The
annular body 11 is integrally formed on the blades 102 by injection
molding.
[0027] Please refer to FIG. 2, which is a top view of the first
embodiment of the present invention. The blade 102 has a front
section 1023, a middle section 1024 and a rear section 1025. The
rear section 1025 is fixedly connected to the circumference of the
hub 101. The middle section 1024 outward extends from the rear
section 1025 to connect with the front section 1023.
[0028] Optimally, the annular body 11 is, but not limited to,
disposed between the front sections 1023 and the rear sections 1025
of the blades 102 (as shown in FIG. 2). In practice, the annular
body 11 can be alternatively disposed on the front sections 1023 of
the blades 102 (as shown in FIG. 3A) or the rear sections 1025 of
the blades 102 (as shown in FIG. 3B) according to the required
strength and flow guide effect of the blade structure 1.
[0029] According to the above arrangement, the annular body 11 is
integrally formed on the blades 102 to increase the strength of the
blades 102 and enhance the fluid efficiency of the fan. In this
case, the vibration and noise of the blades 102 can be reduced.
[0030] Please refer to FIGS. 4A and 4B. FIG. 4A is a perspective
exploded view of a second embodiment of the present invention. FIG.
4B is a perspective assembled view of the second embodiment of the
present invention. The above blade structure 1 is applied to an
axial flow fan 2. The axial flow fan 2 includes a frame body 20, a
fan impeller 10 and an annular body 11. The fan impeller 10 and the
annular body 11 together form a blade structure 1. The blade
structure 1 is identical to the blade structure 1 of the first
embodiment in structure and connection relationship and thus will
not be repeatedly described hereinafter.
[0031] The frame body 20 has a receiving space 201 and a shaft seat
202 disposed at a center of the receiving space 201. The fan
impeller 10 is rotatably assembled with the shaft seat 202 with the
blade structure 1 received in the receiving space 201.
[0032] In operation of the axial flow fan 2, the annular body 11
not only is able to increase the strength of the blades 102, but
also is able to reduce vibration and noise made by the axial flow
fan 2 to more effectively enhance the total air volume.
[0033] According to the above arrangement, the fluid efficiency of
the axial flow fan 2 is increased without increasing the thickness
of the blades 102. Also, the vibration and noise made by the blades
102 of the axial flow fan 2 can be reduced. Moreover, the strength
of the blades 102 of the axial flow fan 2 is increased.
[0034] According to the aforesaid, in comparison with the
conventional axial flow fan, the present invention has the
following advantages:
[0035] 1. The fluid efficiency of the axial flow fan is
increased.
[0036] 2. The vibration and noise are reduced.
[0037] 3. The strength of the blades is increased.
[0038] The above embodiments are only used to illustrate the
present invention, not intended to limit the scope thereof. It is
understood that many changes and modifications of the above
embodiments can be made without departing from the spirit of the
present invention. The scope of the present invention is limited
only by the appended claims.
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