U.S. patent application number 11/635653 was filed with the patent office on 2007-07-26 for heat dissipation fan.
This patent application is currently assigned to ASUSTeK COMPUTER INC.. Invention is credited to Chin-Chun Chiang.
Application Number | 20070172352 11/635653 |
Document ID | / |
Family ID | 38285743 |
Filed Date | 2007-07-26 |
United States Patent
Application |
20070172352 |
Kind Code |
A1 |
Chiang; Chin-Chun |
July 26, 2007 |
Heat dissipation fan
Abstract
A heat dissipation fan used in a frame server, includes a
rotation axis and a plurality of fan blades. The rotation axis is
composed of a main portion and an extension portion, and the
diameter of the main portion is greater than that of the extension
portion. The fan blades extend outward from the rotation axis, and
are utilized to drive the wind from one side of the rotation axis
to the other side of the rotation axis in a direction perpendicular
to the rotation axis. As such, greatly increase the air cutting
area of the fan blades. In this manner, in the server frame studded
with electronic devices and having very limited heat dissipation
space, the heat dissipation efficiency of the server can be raised
significantly, so that the electronic devices may function normally
and efficiently.
Inventors: |
Chiang; Chin-Chun; (Taipei,
TW) |
Correspondence
Address: |
BIRCH STEWART KOLASCH & BIRCH
PO BOX 747
FALLS CHURCH
VA
22040-0747
US
|
Assignee: |
ASUSTeK COMPUTER INC.
|
Family ID: |
38285743 |
Appl. No.: |
11/635653 |
Filed: |
December 8, 2006 |
Current U.S.
Class: |
415/220 |
Current CPC
Class: |
F04D 29/282 20130101;
F04D 25/12 20130101; G06F 1/20 20130101 |
Class at
Publication: |
415/220 |
International
Class: |
F04D 19/00 20060101
F04D019/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 24, 2006 |
TW |
95102559 |
Claims
1. A heat dissipation fan utilized in a server frame for
accommodating electronic devices, which generate heat while in
operation, comprising: a rotating shaft, containing a main portion
and an extension portion, said main portion includes a rotation
device, and heat generated from electronic devices is dissipated in
the direction perpendicular to said rotation axis; and a plurality
of fan blades, connected to said main portion and said extension
portion; wherein the flow direction of said heat dissipation fan is
in the axial direction of said rotation axis.
2. The heat dissipation fan of claim 1, wherein said rotation axis
is integrally formed.
3. The heat dissipation fan of claim 1, wherein the length of said
extension portion is at least equivalent to that of said main
portion.
4. The heat dissipation fan of claim 1, wherein the diameter of
said main portion is larger than the diameter of said extension
portion.
5. The heat dissipation fan of claim 1, wherein said rotation
device includes a fan motor.
Description
BACKGROUND
[0001] 1. Field of Invention
[0002] The invention relates a heat dissipation fan used for a
server, and in particular to a heat dissipation fan used for
raising the heat dissipation efficiency of a server.
[0003] 2. Related Art
[0004] Nowadays, due to the progress and development of science and
technology, the prices of the various computer related equipment
have been reduced significantly, and among them, the price of
server is particularly so. As such, computer has become a daily
necessity of most of the people.
[0005] Usually, a server is composed of a main frame, which is
provided with a plurality of server frames, and that are
retractably disposed in the main frame. Thus, in the server frame a
plurality of electronic devices are provided for use, such as the
hard disk. In general, a server frame is of a specific height, thus
the spacing between the electronic devices is rather limited. Due
to the fact that heat is generated in the operation of the
electronic device, thus, the utilization of heat dissipation
technology to dissipate the heat generated during the operation of
the various electronic devices from the server having low profile
and limited spacings between/among the electronic devices to
achieve the heat dissipation efficiency is an important task in
this field.
[0006] In this respect, refer to FIG. 1 for a cross-section view of
a sever frame having the electronic devices disposed therein
according to prior art. As shown in FIG. 1, a server frame 10 is
provided with a plurality of hot-pluggable hard disk 20 and a turbo
fan 30 used for heat dissipation, thus the heat generated during
the operation of the hard disk 20 can be carried out of the server
through the operation of the turbo fan 30. As shown in FIG. 1, the
turbo fan 30 is provided with an outer shell 31, a rotation axis
32, and a plurality of fan blades 33. The rotation axis 32 is
disposed in the outer shell 31, and the fan blades 33 are extended
outward from the rotation axis 32. However, since the length of the
rotation axis 32 is rather short, thus the area of the air cut
through by the fan blade 33 used to carry out the heat through its
rotation is rather limited. As such, the heat dissipation
efficiency of the turbo fan 30 is not sufficient to meet the design
requirements.
SUMMARY OF THE INVENTION
[0007] In view of the problems and shortcomings of the prior art,
the objective of the invention is to provide a heat dissipation fan
used in a framed server, thus raising the heat dissipation
efficiency of the server significantly.
[0008] Therefore, to overcome and improve the above-mentioned
problems, the invention provides a heat dissipation fan for a
server frame, which can be utilized to dissipate the heat generated
by the electronic devices in a server. The heat dissipation fan
includes a rotation axis and a plurality of fan blades. The
rotation axis has an interconnected main portion and an extension
portion. The main portion includes a rotation device, and the heat
dissipation direction of the heat source is perpendicular to the
rotation axis, the length of the main portion is equivalent to that
of the extension portion. Namely, the total length of the rotation
axis is twice that of the main portion.
[0009] The fan blades are connected to the main portion and the
extension portion. Wherein, the wind blowing direction of the heat
dissipation fan is along the axial direction of the rotation axis,
so that wind is generated from one side of the rotation axis to the
other side of the rotation axis by the fan blades in a direction
perpendicular to that of the rotation axis.
[0010] Thus, the objective of the invention is achieved through the
specially designed rotation axis having extension portion of
smaller diameter, so as to raise the air-cutting area of the fan
blade significantly. Thus, the area of the air cut by the fan
blades extend outward from the main portion and extension portion
is much larger than the area cut only by the fan blades extending
outward from the main portion. As such, the increase of the
air-cutting area of the fan blade can be realized by increasing the
length of the extension portion of the heat dissipation fan, so as
to raise the heat dissipation efficiency of the server studded with
various electronic devices and having limited heat dissipation
space, so that the various electronic devices in the server may
function normally.
[0011] Further scope of applicability of the invention will become
apparent from the detailed description given hereinafter. However,
it should be understood that the detailed description and specific
examples, while indicating preferred embodiments of the invention,
are given by way of illustration only, since various changes and
modifications within the spirit and scope of the invention will
become apparent to those skilled in the art from this detailed
description.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The invention will become more fully understood from the
detailed description given hereinbelow for illustration only, and
thus are not limitative of the invention, and wherein:
[0013] FIG. 1 is a cross-section view of a sever frame having the
electronic devices disposed therein according to prior art;
[0014] FIG. 2 is a cross-section view of a sever frame having the
electronic devices disposed therein according to the invention;
[0015] FIG. 3 is a perspective view of a heat dissipation fan
according to an embodiment of the invention; and
[0016] FIG. 4 is a cross section view of a main portion of a heat
dissipation fan according to an embodiment of the invention.
DETAILED DESCRIPTION OF THE INVENTION
[0017] The purpose, construction, features, and functions of the
invention can be appreciated and understood more thoroughly through
the following detailed description with reference to the attached
drawings.
[0018] In general, the server frame is designed to have a specific
size, thus, usually, the space reserved for the electronic devices
disposed therein is rather limited to increase the space
utilization rate of a server. As such, the heat generated during
the operation of the electronic devices is carried away by the heat
dissipation device disposed in the server, so that the electronic
devices may function normally and efficiently.
[0019] Usually, in a server, the heat dissipation fan is utilized
as the heat dissipation device, thus the size of its heat
dissipation efficiency depends on the air cutting area of the fan
blade of the heat dissipation fan. So, presently, the heat
dissipation in a server is realized through a turbo fan 30 in
consideration of the limited space available. However, according to
the design of the turbo fan 30, the direction of the wind is
parallel to the axial direction of the rotation axis 32. Therefore,
the air cutting area of the fan blades 33 of the turbo fan 30 may
only cover the space outside the rotation axis 32. As such, the
heat dissipation efficiency of the turbo fan 30 is not quite
satisfactory. In this respect, refer to the cross section view of a
server frame having electronic devices disposed therein according
to the prior art as shown in FIG. 1.
[0020] Thus, according to the above description it is evident that,
the air cutting area of the fan blades must be increased to raise
the heat dissipation efficiency of the heat dissipation fan in a
server. Thus, the heat dissipation fan must be redesigned to
increase the air cutting area of the fan blades.
[0021] Refer to FIG. 2 for a cross-section view of a server frame
having the electronic devices disposed therein according to an
embodiment of the invention. Also, refer to FIG. 3 for a
perspective view of a heat dissipation fan according to an
embodiment of the invention. As shown in FIG. 2, the inside of
server frame 10 is provided with a plurality of hot-pluggable hard
disks 20, and a heat dissipation fan 40, so that the heat generated
during the operation of the hard disk 20 can be carried out of the
server in conjunction with the rotation of the heat dissipation fan
40. As shown in the drawing, the heat dissipation fan 40 is
composed of a shell 41, a rotation axis 42, and a plurality of fan
blades 43.
[0022] The rotation axis 42 is disposed inside the shell 41, the
heat generated during the operation of the electronic devices is
dissipated in the heat dissipation direction 21 perpendicular to
the rotation axis 32, and the rotation axis 42 is integrally formed
by a main portion 421 and an extension portion 422. The diameter of
the main portion 421 is greater than that of the extension portion
422, and the length of the main portion 421 is equal to the length
of the extension portion 422 at most. Wherein, the main portion
includes a transmission device, such as a fan motor. In this
respect, refer to FIG. 4 for a cross-section view of a main portion
421. As shown in FIG. 4, the fan motor 50 is mounted on the main
portion 421, and when in operation, it can drive the rotation axis
32 to rotate.
[0023] The fan blade 43 may be connected to both the main portion
421 and the extension portion 422, the wind blowing direction of
the heat dissipation fan is along the axial direction of the
rotation axis, so that the wind may be carried from one side of the
rotation axis 42 to the other side of the rotation axis 42.
[0024] Through the special design of the smaller diameter extension
portion 422 of the rotation axis of the rotation axis 32, the air
cutting area of the fan blades 43 is increased significantly. Since
the air cutting area of the fan blade 43 for the main portion 421
and extension portion 422 combined is larger than that for the fan
blades 43 of the main portion 421 alone. In this manner, the air
cutting area of the fan blades 43 may be raised by increasing the
length of the extension portion 422 in the heat dissipation fan
40.
[0025] In comparing the heat dissipation fan 40 of FIG. 2 with the
turbo fan 30 of FIG. 1, it is evident that, the size of main
portion 421 of the heat dissipation fan 40 is equivalent to that of
the rotation axis 32 of the turbo fan 30, so that the space outside
the main portion 421 of the heat dissipation fan 40 may be used to
accommodate the extension portion 422, hereby raising the air
cutting area of the fan blades 43. This is quite different from
that of the turbo fan 30 in the prior art, wherein, the rotation
axis 32 occupies too much space in the turbo fan 30. In addition,
usually, the number of turbo fans 30 used in the respective server
frame 20 is quite enormous, thus in the prior art, the rotation
axis 32 occupies too much space in the server frame 20. In
contrast, in the invention, the main portion 421 of the respective
heat dissipation fan 40 is required to occupy only a small portion
of the space in the heat dissipation fan, and the number of the
heat dissipation fans 40 disposed in the server frame 10 is quite
few, so that in the invention, the main portion 421 occupies only
relatively small portion of space in server frame 10. The space
thus saved can be used to accommodate fan blades 43, hereby raising
the heat dissipation efficiency significantly. In this manner, in
the server frame 10 studded with hard disk 20 and having very
limited heat dissipation space, the heat dissipation efficiency of
the server can be raised enormously, so that the hard disk 20 may
function normally and efficiently.
[0026] Moreover, in the afore-mentioned structure, the number of
heat dissipation fans 40 utilized in the server can be
significantly reduced, thus the cost spent on checking and
maintaining the respective heat dissipation fans may also be
reduced.
[0027] Summing up the above, in comparison, the space occupied by
the heat dissipation fan 40 of the invention is three and a half
times that of the turbo fan 30 of the prior art as shown in FIGS. 1
and 2 respectively. However, it is evident that the air cutting
area of the fan blade 43 of the invention is increased
significantly.
[0028] The invention being thus described, it will be obvious that
the same may be varied in many ways. Such variations are not to be
regarded as a departure from the spirit and scope of the invention,
and all such modifications as would be obvious to one skilled in
the art are intended to be included within the scope of the
following claims.
* * * * *