U.S. patent application number 13/684252 was filed with the patent office on 2014-05-29 for fan structure.
This patent application is currently assigned to COOLER MASTER CO., LTD.. The applicant listed for this patent is COOLER MASTER CO., LTD.. Invention is credited to Hai-Jun HE, Kai-Hsiang HU, Jia-Sheng LAI, Shi-Man XU.
Application Number | 20140147282 13/684252 |
Document ID | / |
Family ID | 50773459 |
Filed Date | 2014-05-29 |
United States Patent
Application |
20140147282 |
Kind Code |
A1 |
HU; Kai-Hsiang ; et
al. |
May 29, 2014 |
FAN STRUCTURE
Abstract
A fan structure includes a hub and at least one set of blades
connected to and extending away from the hub, each of the blades
having a plurality of steps with a height difference formed away
from the periphery of the hub, the height of the inside one of the
steps higher than that of the outside one of the steps, thereby
providing a disturbed flow-guiding effect so as to enhance the air
pressure and the air flow of the wind flow field.
Inventors: |
HU; Kai-Hsiang; (New Taipei
City, TW) ; XU; Shi-Man; (New Taipei City, TW)
; LAI; Jia-Sheng; (New Taipei City, TW) ; HE;
Hai-Jun; (New Taipei City, TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
COOLER MASTER CO., LTD. |
New Taipei City |
|
TW |
|
|
Assignee: |
COOLER MASTER CO., LTD.
New Taipei City
TW
|
Family ID: |
50773459 |
Appl. No.: |
13/684252 |
Filed: |
November 23, 2012 |
Current U.S.
Class: |
416/189 ;
416/223R |
Current CPC
Class: |
F04D 25/0613 20130101;
F04D 29/384 20130101; F04D 29/327 20130101 |
Class at
Publication: |
416/189 ;
416/223.R |
International
Class: |
F04D 29/38 20060101
F04D029/38 |
Claims
1. A fan structure, comprising: a hub; and at least one set of
blades, extending from the hub, each of the blades having a step
structure radially formed away from the periphery of the hub.
2. The fan structure of claim 1, wherein the set of blades is
consisting of two blades.
3. The fan structure of claim 1, wherein the set of blades is
consisting of three blades.
4. The fan structure of claim 1, wherein the hub includes an upper
plate and a shrouding plate bended and extending from the periphery
of the upper plate, the set of blades extending from the shrouding
plate, respectively.
5. The fan structure of claim 4, further comprising a shaft
centrally connected to an inside portion of the upper plate and
surrounded by the shrouding plate.
6. The fan structure of claim 1, wherein the step structure has a
fillet formed on the tip thereof.
7. A fan structure, comprising: a hub; and at least one set of
blades connected to and extending away from the hub, each of the
blades having a plurality of steps, the steps having a height
difference and formed away from the periphery of the hub, a height
of an inside one of the steps higher than a height of an outside
one of the steps.
8. The fan structure of claim 7, wherein the set of blades is
consisting of two blades.
9. The fan structure of claim 7, wherein the set of blades is
consisting of three blades.
10. The fan structure of claim 7, wherein the hub includes an upper
plate and a shrouding plate bended and extending from the periphery
of the upper plate, the set of blades extending from the shrouding
plate, respectively.
11. The fan structure of claim 10, further comprising a shaft
centrally connected to the inside of the upper plate and surrounded
by the shrouding plate.
12. The fan structure of claim 7, wherein each of the blades has an
upper arc surface and a lower arc surface correspondingly formed
under the upper arc surface, a cutting line of the upper arc
surface intersecting with an axle line of the hub.
13. The fan structure of claim 12, wherein the inside one of the
steps is disposed between the upper arc surface and the outside one
of the steps, and the height of the inside step is lower than that
of the upper arc surface.
14. The fan structure of claim 7, wherein the outside step has a
fillet formed on the tip thereof.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a fan structure, in
particular, a fan structure for a heat dissipating fan.
[0003] 2. Description of Related Art
[0004] A conventional fan structure generally comprises a center
portion and a plurality of blades extending from the periphery of
the center portion. The fan structure is further assembled with
electronic parts and a frame so as to form a heat dissipating fan
for dissipating all kinds of electronic devices.
[0005] However, the conventional fan structure can merely generate
a vortex flow field during a rotating operation. The air pressure
and the air flow of the vortex flow field cannot be effectively
improved due to the shape of the blade so as to result in poor heat
dissipating performance. Further, a problem of the blades also
generating noises with high decibels during high speed rotation
should be resolved immediately.
SUMMARY OF THE INVENTION
[0006] An objective of the present invention is to provide a fan
structure having a step structure formed on the end of a blade,
thereby providing a disturbed flow-guiding effect so as to enhance
the air pressure and the air flow of the wind flow field. In order
to achieve the above mentioned objective, the present invention
provides a fan structure comprising a hub and at least one set of
blades extending from the hub, each of the blades has a step
structure radially formed away from the periphery of the hub.
[0007] In order to achieve the above mentioned objective, the
present invention provides a fan structure comprising a hub and at
least one set of blades connected to and extending away from the
hub, each of the blades having a plurality of steps with a height
difference formed away from the periphery of the hub, the height of
the inside one of the steps higher than that of the outside one of
the steps.
[0008] The present invention further has the following effect of
noise suppression by forming a fillet on the tip of the outside
step.
BRIEF DESCRIPTION OF DRAWING
[0009] FIG. 1 is a stereoscopic diagram illustrating a fan
structure according to a first embodiment of the present
invention.
[0010] FIG. 2 is a stereoscopic diagram with respect to another
view angle of FIG. 1.
[0011] FIG. 3 illustrates a top-view diagram with respect to FIG.
1.
[0012] FIG. 4 illustrates a sectional diagram along a line 4-4 of
FIG. 3.
[0013] FIG. 5 is a schematic diagram illustrating the fan structure
according to a second embodiment of the present invention assembled
with a frame.
[0014] FIG. 6 is a schematic diagram illustrating the fan structure
according to a third embodiment of the present invention assembled
with a frame.
[0015] FIG. 7 is a schematic diagram illustrating the fan structure
according to a fourth embodiment of the present invention assembled
with a frame.
[0016] FIG. 8 is a schematic diagram illustrating the fan structure
according to a fifth embodiment of the present invention assembled
with a frame.
DETAILED DESCRIPTION OF THE INVENTION
[0017] The detailed description and the technical contents of the
present invention are illustrated with the accompanied drawings as
follows. The accompanied drawings merely provide reference and
description instead of a limit for the present invention.
[0018] Please referring to FIGS. 1-4, according to the embodiment,
a fan structure 1 substantially comprises a hub 10 and a plurality
of blades 20. The hub 10 is composed of a circular upper plate 11
and an annular shrouding plate 12 downwardly bended and extended
from the edge of the upper plate 11. A shaft 13 is centrally
connected to the inside of the upper plate 11 and surrounded by the
shrouding plate 12.
[0019] Nine blades 20 radially extend away from the peripheral
surface of the shrouding plate 12. Each blade 20 is substantially
of a three dimensional arched shape, which has an upper arc surface
21 and a lower arc surface 22 correspondingly formed under the
upper arc surface 21. Additionally, the cutting line of the upper
arc surface 21 intersects with the axle line of the hub 10 (i.e.,
an axial-flow type blade). Each blade 20 has a step structure 30
radially formed away from the edge of the hub 10. The step
structure 30 is consisting of an inside step 31 and an outside step
32. In addition, a height drop is formed between either the steps
31, 32 or the step 31, 32 and the upper arc surface 21. The height
of the inside step 31 is lower than that of the upper arc surface
21 while being higher than that of the outside step 32. Further, a
fillet 321 for noise suppression is formed above the tip of the
outside step 32.
[0020] Furthermore, each blade 20 may be formed either by directly
extending from the edge of the hub 10 or by being linked to the
peripheral surface of the hub 10 via a connecting method and
extending away from the hub 10.
[0021] In the utilization of the high speed operation of the fan
structure 1, each blade 20 sucks air from the back thereof and push
the air forward via the upper arc surface 21. Such air will be
blowed out in the form of vortex flow. The air pressure and the air
flow may be enhanced by disposing the step structure 30 on the tip
of the blade 20 which can alter said vortex flow field and provide
a disturbed flow-guiding effect.
[0022] Please referring to FIG. 5, which illustrates the fan
structure according to the second embodiment of the present
invention, the fan structure 1a differs from the fan structure 1
according to the first embodiment in that the fan structure 1a is
substantially combined with a frame 5. According to the embodiment,
the blades comprises three blades 20 with the step structure 30 and
six blades 20a without the step structure 30. The three blades 20
commonly form one set and are uniformly disposed between the blades
20a.
[0023] Please referring to FIG. 6, which illustrates the fan
structure according to the third embodiment of the present
invention, the blades comprises six blades 20 with the step
structure 30 and three blades 20b without the step structure 30.
The six blades 20 commonly form three sets and are uniformly
disposed between the blades 20.
[0024] Please referring to FIG. 7, which illustrates the fan
structure according to the fourth embodiment of the present
invention, the blades comprises three blades 20 with the step
structure 30 and three blades 20c without the step structure 30.
The three blades 20 commonly form one set and each is uniformly
disposed between any two adjacent blades 20c.
[0025] Please referring to FIG. 8, which illustrates the fan
structure according to the fifth embodiment of the present
invention, the blades comprises two blades 20 with the step
structure 30 and six blades 20d without the step structure 30. The
two blades 20 commonly form one set and each is uniformly disposed
between any two adjacent blades 20d.
[0026] In conclusion, the fan structure according to the present
invention indeed achieve the purpose and thus solves the defect of
the prior art. Further, it totally complies with requirements for
the application of an Utility patent extremely based on the novelty
and nonobviousness thereof such that an application is filed
pursuant to the Patent Law. Applicant respectfully requests an
examination for the application so as to protect the invention of
the inventor.
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