U.S. patent application number 12/490277 was filed with the patent office on 2010-03-04 for heat dissipation apparatus incorporating a fan.
This patent application is currently assigned to FU ZHUN PRECISION INDUSTRY (SHEN ZHEN) CO., LTD.. Invention is credited to HONG-BO DENG, DI-QIONG ZHAO.
Application Number | 20100051232 12/490277 |
Document ID | / |
Family ID | 41723594 |
Filed Date | 2010-03-04 |
United States Patent
Application |
20100051232 |
Kind Code |
A1 |
ZHAO; DI-QIONG ; et
al. |
March 4, 2010 |
HEAT DISSIPATION APPARATUS INCORPORATING A FAN
Abstract
A heat dissipation apparatus includes a heat sink and a fan. The
heat sink includes a plurality of radial first and second fins. The
first and second fins each include a main body and an extension arm
extending upwardly from the main body. The main bodies and the
extension arms cooperatively form a space therebetween for securely
receiving the fan therein. Each extension arm defines an engaging
groove communicating with the space. A height of the extension arm
of each second fin is less than that of the extension arm of each
first fin. A fixing recess is defined over the extension arms of
the second fins. The fan includes a frame extending downwardly out
a plurality of legs and radially out a fixing arm. The legs have
hooks engaging in the engaging grooves, and the fixing arm is fixed
in the fixing recess.
Inventors: |
ZHAO; DI-QIONG; (Shenzhen
City, CN) ; DENG; HONG-BO; (Shenzhen City,
CN) |
Correspondence
Address: |
PCE INDUSTRY, INC.;ATT. Steven Reiss
288 SOUTH MAYO AVENUE
CITY OF INDUSTRY
CA
91789
US
|
Assignee: |
FU ZHUN PRECISION INDUSTRY (SHEN
ZHEN) CO., LTD.
Shenzhen City
CN
FOXCONN TECHNOLOGY CO., LTD.
Tu-Cheng
TW
|
Family ID: |
41723594 |
Appl. No.: |
12/490277 |
Filed: |
June 23, 2009 |
Current U.S.
Class: |
165/80.3 ;
165/104.26; 165/121 |
Current CPC
Class: |
H01L 2924/0002 20130101;
H01L 23/3672 20130101; H01L 2924/0002 20130101; H01L 23/467
20130101; H01L 23/427 20130101; H01L 2924/00 20130101 |
Class at
Publication: |
165/80.3 ;
165/121; 165/104.26 |
International
Class: |
F28F 13/00 20060101
F28F013/00; F28D 21/00 20060101 F28D021/00; F28D 15/02 20060101
F28D015/02 |
Foreign Application Data
Date |
Code |
Application Number |
Aug 27, 2008 |
CN |
200810304232.0 |
Claims
1. A heat dissipation apparatus, comprising: a heat sink defining a
recessed space at a center of a top end thereof, an upper portion
of the heat sink surrounding the recessed space, at least one
fixing recess being defined in a top end of the upper portion and
at least one engaging groove being defined in an inner side of the
upper portion, the at least one fixing recess and the at least one
engaging groove communicating with the recessed space; and a fan
comprising a frame and an impeller assembled to the frame, the
frame extending downwardly out a plurality of legs and radially out
at least one fixing arm, each of the legs comprising a hook at a
free end thereof, the hooks of the legs engaging in the at least
one engaging groove of the heat sink, and the at least one fixing
arm being fixed in the at least one fixing recess, for securely
mounting the fan in the recessed space of the heat sink.
2. The heat dissipation apparatus of claim 1, wherein the heat sink
comprises a pair of first fin assemblies and a pair of second fin
assemblies alternate with the pair of first fin assemblies, the
first and second fin assemblies cooperatively forming an annular
structure, the first fin assemblies and the second fin assemblies
each comprising a plurality of fins, each fin comprising a main
body and an extension arm extending upwardly from the main body,
the extension arms of the first and second fin assemblies
cooperatively forming the upper portion of the heat sink, a height
of the extension arm of each fin of the second fin assembly being
less than that of the extension arm of each fin of the first fin
assembly, the at least one fixing recess being defined between the
pair of first fin assemblies and over the extension arms of the
fins of each second fin assembly.
3. The heat dissipation apparatus of claim 2, wherein a width of
each extension arm of the first and second fin assemblies is less
than that of each main body of the first and second fin assemblies,
the extension arms of the first and second fin assemblies
cooperatively forming the recessed space therebetween, the engaging
groove being defined in at least one extension arm of the first and
second fin assemblies.
4. The heat dissipation apparatus of claim 2, further comprising at
least one heat pipe with an arcuate condensation section, the first
and second fin assemblies each defining at least one receiving
groove therein, the second fin assemblies each further defining an
opening at an outer-down side thereof in communication with the at
least one receiving groove of a corresponding second fin assembly,
a part of the condensation section of the at least one heat pipe
being inserted into the at least one receiving groove of each first
fin assembly, and another part thereof entering into the at least
one receiving groove of each second fin assembly through the
opening of the corresponding second fin assembly.
5. The heat dissipation apparatus of claim 1, wherein the frame
comprises an annular rim, the legs extending downwardly and the at
least one fixing arm extending radially out from the rim, the heat
sink forming a step above the at least one engaging groove in the
recessed space, the rim sitting on the step.
6. The heat dissipation apparatus of claim 5, wherein the heat sink
comprises a pair of first fin assemblies and a pair of second fin
assemblies alternate with the pair of first fin assemblies, the
first fin assemblies each comprising a plurality of first fins
stacked along a circumferential direction of the heat sink, the
second fin assemblies each comprising a plurality of second fins
stacked along the circumferential direction of the heat sink, the
step being formed on each of the first fin assemblies, each of the
first fins extending perpendicularly and horizontally out a step
flange from the step, all the step flanges of the first fins of
each first fin assembly cooperatively forming a step surface, each
of the second fins extending perpendicularly and horizontally out a
top flange at a top end thereof, all the top flanges of the second
fins of each second fin assembly cooperatively forming a top
surface, the top surface of each second fin assembly being coplanar
with the step surface of each first fin assembly, the rim of the
fan sitting on the top surface of each second fin assembly and the
step surface of each first fin assembly, the at least one fixing
arm abutting the top surface of the each second fin assembly.
7. A heat dissipation apparatus, comprising: a heat sink comprising
a plurality of radial fins, each of the fins comprising a main body
and an extension arm extending upwardly from the main body, a width
of each extension arm of the fins being less than that of each main
body of the fins, the main bodies and the extension arms of the
fins cooperatively forming a space therebetween, the extension arms
of the fins defining at least one engaging groove communicating
with the space, the extension arms of a part of the fins protruding
upwardly out from the extension arms of the other part of the fins,
such that at least one fixing recess being defined at a top end of
the heat sink; and a fan comprising a frame and an impeller
assembled to the frame, the frame extending downwardly out a
plurality of legs and radially out at least one fixing arm, each of
the legs comprising a hook at a free end thereof, the hooks of the
legs engaging in the at least one engaging groove of the heat sink,
and the at least one fixing arm being fixed in the at least one
fixing recess, for securely mounting the fan in the space of the
heat sink.
8. The heat dissipation apparatus of claim 7, wherein the fins
comprise a plurality of first fins and a plurality of second fins,
the first fins being stacked together to cooperatively form a pair
of first fin assemblies, the second fins being stacked together to
cooperatively form a pair of second fin assemblies, the first fin
assemblies being alternate with the second fin assemblies to form
an annular structure, the extension arms of the first fins of the
first fin assemblies protruding upwardly beyond the extension arms
of the second fins the second fin assemblies.
9. The heat dissipation apparatus of claim 8, wherein the frame
comprises an annular rim, the legs extending downwardly and the at
least one fixing arm extending radially out from the rim, each
extension arm of the first fins of the first fin assemblies forming
a step above the at least one engaging groove in the space, the rim
sitting on the steps of the first fin assemblies.
10. The heat dissipation apparatus of claim 9, wherein each of the
first fins extending perpendicularly out a step flange from the
step, all the step flanges of the first fins of each first fin
assembly cooperatively forming a step surface, each of the second
fins extending perpendicularly and horizontally out a top flange at
a top end thereof, all the top flanges of the second fins of each
second fin assembly cooperatively forming a top surface, the top
surface of each second fin assembly being coplanar with the step
surface of each first fin assembly, the rim of the fan sitting on
the top surface of each second fin assembly and the step surface of
each first fin assembly, the at least one fixing arm abutting the
top surface of the each second fin assembly.
11. The heat dissipation apparatus of claim 8, further comprising
at least one heat pipe with an arcuate condensation section, the
first and second fin assemblies each defining at least one
receiving groove therein, the second fin assemblies each further
defining an opening at an outer-down side thereof in communication
with the at least one receiving groove of the corresponding second
fin assembly, a part of the condensation section of the at least
one heat pipe being inserted into the at least one receiving groove
of each first fin assembly, and another part thereof entering into
the at least one receiving groove of each second fin assembly
through the opening of the corresponding second fin assembly.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] Relevant subject matter is disclosed in co-pending U.S.
patent application Ser. No. 12/331,391, filed on Dec. 9, 2008, both
of which are assigned to the same assignee as the present
application. The disclosure of the co-pending application is
incorporated herein by reference.
BACKGROUND
[0002] 1. Technical Field
[0003] The present disclosure generally relates to heat
dissipation, and particularly to a heat dissipation apparatus
utilizing a fan for enhancing a dissipating efficiency.
[0004] 2. Description of Related Art
[0005] It is well known that if heat generated by electronic
components, such as integrated circuit chips, during operation is
not efficiently dissipated, these electronic components may suffer
damage. Thus, heat dissipation apparatuses are often used to cool
the electronic components.
[0006] A typical heat dissipation apparatus includes a heat sink
and a fan. The heat sink is thermally connected with a heat
generating electronic component. The fan is mounted on the heat
sink via a plurality of screws. During operation, heat generated by
the heat generating electronic component is transferred to the heat
sink. The fan produces an airflow towards the heat sink to
dissipate the heat therefrom.
[0007] However, in the heat dissipation apparatus, the fan is
assembled to the heat sink via the plurality of screws, which
complicates the assembly of the heat dissipation apparatus.
[0008] What is needed, therefore, is a heat dissipation apparatus
which overcomes the above-described limitations.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Many aspects of the present heat dissipation apparatus can
be better understood with reference to the following drawings. The
components in the drawings are not necessarily drawn to scale, the
emphasis instead being placed upon clearly illustrating the
principles of the disclosed heat dissipation apparatus. Moreover,
in the drawings, like reference numerals designate corresponding
parts throughout the several views.
[0010] FIG. 1 is an assembled, isometric view of a heat dissipation
apparatus in accordance with one embodiment of the disclosure.
[0011] FIG. 2 is an exploded, isometric view of the heat
dissipation apparatus of FIG
[0012] FIG. 3 is an isometric view showing a fan disassembled from
the heat dissipation apparatus of FIG. 1.
DETAILED DESCRIPTION
[0013] Referring to FIGS. 1 and 2, a heat dissipation apparatus in
accordance with one embodiment of the disclosure is shown. The heat
dissipation apparatus includes a high heat conductive base 10, a
heat sink 20, a plurality of heat pipes 30 thermally connecting the
base 10 with the heat sink 20, a heat conductive core 40 received
in the heat sink 20, and a fan 50 mounted in a top of the heat sink
20.
[0014] The heat sink 20 is annular, and includes a pair of first
fin assemblies 21 and a pair of second fin assemblies 23.
[0015] Each of the first fin assemblies 21 is sectorial, and
includes a plurality of radial first fins 211 stacked along a
circumferential direction of the heat sink 20. An air channel 212
is defined between every two adjacent first fins 211.
[0016] Each of the first fins 211 includes a rectangular main body
213 and an extension arm 214 extending upwardly from the main body
213. Each of the first fin assemblies 21 defines a plurality of
arcuate first receiving grooves 215 therein through each main body
213, for receiving the heat pipes 30 therein, respectively. The
extension arm 214 extends upwardly form an outer-upper side of the
main body 213, and has a width less than that of the main body 213.
The extension arm 214 forms a step 216 and defines an engaging
groove 217 at an inner side thereof. A width of the extension arm
214 below the step 216 is greater than a width of the extension arm
214 above the step 216. The engaging groove 217 is wedgy, and
located below the step 216. The engaging groove 217 and the step
216 are used to secure the fan 50 onto the heat sink 20. The
extension arm 214 extends perpendicularly and horizontally out a
top flange 218 at a top side thereof, and a step flange 219 from
the step 216. All the top flanges 218 of the first fins 211 of each
first fin assembly 21 cooperatively form a planar top surface 228.
All the step flanges 219 of the first fins 211 of each first fin
assembly 21 cooperatively form a planar step surface 229.
[0017] The second fin assemblies 23 are similar to the first fin
assemblies 21, with each also being sectorial, and including a
plurality of second fins 231 stacked along the circumferential
direction of the heat sink 20. An air channel 232 is defined
between every two adjacent second fins 231.
[0018] Each of the second fins 231 includes a main body 233 and an
extension arm 234. The main body 233 of each second fin 231 is
substantially triangular, such that an opening 240 is defined at an
outer-lower side of each second fin assembly 23 when the second
fins 231 are stacked together. Each of the second fin assemblies 23
defines an arcuate second receiving groove 235 therein through each
main body 233. The second receiving groove 235 aligns with an upper
one of the first receiving grooves 215, and is in communication
with the opening 240.
[0019] The extension arm 234 extends upwardly form an outer-upper
side of the main body 233 of each second fin 231, and has a width
less than that of the main body 233. A height of the extension arm
234 of each second fin 231 is less than that of the extension arm
214 of the first fin 211. A top of the extension arm 234 is
approximately level with that of the step surface 229 of the first
fin assembly 21. The extension arm 234 defines a wedgy engaging
groove 237 at an inner side thereof, aligning with the engaging
groove 217 of the first fin 211. Alternatively, the engaging
grooves 217, 237 of the heat sink 20 can be defined only in one of
the first and second assemblies 21, 23, for further simplifies
manufacturing procedure of the heat sink 20. The extension arm 234
extends perpendicularly out a top flange 238 at a top side thereof.
All the top flanges 238 of the second fins 231 of each second fin
assembly 23 cooperatively form a planar top surface 248. The top
surface 248 of each second fin assembly 23 is coplanar with the
step surface 229 of each first fin assembly 21. The top surface 248
of each second fin assembly 23 and the step surface 229 of each
first fin assembly 21 cooperatively support the fan 50 when the fan
50 is assembled on the heat sink 20.
[0020] Each of the heat pipe 30 includes an arcuate condensation
section 31. Parts of the condensation sections 31 of the heat pipes
30 are inserted into the first receiving grooves 215 of the first
fin assemblies 20, and the other parts thereof are received in the
second receiving grooves 235 and the openings 240 of the second fin
assemblies. The heat conductive core 40 is cylindrical, and has a
high heat conductivity. Preferably, the heat conductive core 40 is
made of copper.
[0021] The fan 50 includes a frame 51 and an impeller 52 mounted on
the frame 51. The frame 51 includes a holder 511 at a center
thereof, a rim 512 at an outer periphery thereof, and a plurality
of ribs 513 connecting the holder 511 with the rim 512. The holder
511 supports the impeller 52, and the impeller 52 is hung on the
holder 511 and faces downwardly. The rim 512 is annular, and
extends perpendicularly and downwardly out a plurality of legs 514.
The legs 514 are evenly arranged on the rim 512. A hook 515 extends
radially out from a free end of each leg 514. The hook 515 matches
with the engaging grooves 217, 237 of the first and second fin
assemblies 21, 23, for mounting the fan 50 into the heat sink 20.
The rim 512 further extends radially out a pair of fixing arms 517
respectively aligning with the second fin assemblies 23. Each of
the fixing arms 517 is substantially sectorial, and has an
outwardly increased width along a radial direction of the heat sink
20. A height of each of the fixing arms 517 is equal to a height
difference between the extension arm 234 of each second fin
assembly 23 and the extension arm 214 of each first fin assembly
21. The ribs 513 are strip-shaped, for supporting the holder 511 at
the center of the frame 51. Two of the ribs 513 connect with the
rim 512 at locations which are adjacent to middles of the pair of
the fixing arms 517, respectively, wherein one of the two ribs 513
defines a wire groove 518 therein. A wire 519 is received in the
wire groove 518, and electrically connects the fan 50 with a power
source, for supplying electrical power to the fan 50.
[0022] Referring also to FIG. 3, during assembly of the heat
dissipation apparatus, the condensation sections 31 of the heat
pipes 30 are respectively inserted into the first receiving grooves
215 of the pair of first fin assemblies 21 along two opposite
orientations, with a free end of each condensation section 31
protruding out of a corresponding first fin assembly 21. The first
fin assemblies 21 and the heat pipes 30 are arranged on the base
10. The first fin assemblies 21 are oriented face to face, and
space from each other. The second fin assemblies 23 are inserted
into spaces between the first fin assemblies 21 from top to bottom,
respectively. The free end of the condensation section 31 of each
heat pipe 30 has a top half entering into the second receiving
groove 235 through the opening 240 of the corresponding second fin
assembly 23 and a lower half received in the opening 240. At this
time, the first fin assemblies 21 and the second fin assemblies 23
are alternate with each other, and cooperatively form the annular
heat sink 20. All the engaging grooves 217, 237 of the first and
second fin assemblies 21, 23 cooperatively form an annular engaging
groove 27 of the heat sink 20. The top surfaces 248 of the second
fin assemblies 23 are coplanar with the step surfaces 229 of the
first fin assemblies 21. Since the height of the extension arm 234
of each second fin assembly 23 is less than that of the extension
arm 214 of each first fin assembly 21, a sectorial fixing recess 25
is defined between the first fin assemblies 21 over the top surface
248 of each second fin assembly 23.
[0023] The heat conductive core 40 is enclosed by the main bodies
213, 233 of the first and second fin assemblies 21, 23, and has a
circumferential periphery thereof securely soldered to inner
surfaces of the first and second fin assemblies 21, 23. The first
and second fins 211, 231 of the first and second fin assemblies 21,
23 extend out from the heat conductive core 40 in a radial pattern.
The extension arms 214, 234 of the first and second fin assemblies
21, 23, cooperatively form a recessed space 29 over the heat
conductive core 40. The steps 216 and the step surfaces 229 of the
first fin assemblies 21 are located in the space 29, and the
annular engaging groove 27 communicates with the space 29.
[0024] The fan 50 is aligned with and pressed into the space 29,
with bottom surfaces of the rim 512 of the fan 50 abut the step
surfaces 229 of the first fin assemblies 21 and the top surfaces
248 of the second fin assemblies 23. The fixing arms 517 are fixed
in the fixing recesses 25, respectively, with bottom surfaces of
the fixing arms 517 abutting on the top surfaces 248 of the second
fin assemblies 23. At this time, the impeller 52 is just received
in the space 29; top and outer side surfaces of the fixing arms 517
are coplanar with top surface and circumferential periphery of the
heat sink 20, respectively; the hooks 515 of the legs 514 of the
fan 50 are engaged into the engaging groove 27, for mounting the
fan 50 in the heat sink 20.
[0025] During operation of the heat dissipation apparatus, the base
10 absorbs heat from the heat generating electronic component,
which is transferred to the heat sink 20 via the heat conductive
core 40 and the heat pipes 30. The fan 50 produces airflow toward
the heat sink 20, and dissipates heat from the heat sink 20 into
ambient air.
[0026] In the heat dissipation apparatus, the fan 50 is mounted in
the space 29 of the heat sink 20, and the impeller 52 is enclosed
by the heat sink 20, which makes the most of the cool airflow
produced by the fan 50 flow through the first and second fins 211,
231. Meanwhile, the heat sink 20 enclosing the fan 50 severs as a
sidewall for the fan 50, which saves material of the fan 50 and
increases pressure of the airflow produced by the fan 50.
[0027] In addition, the heat sink 20 includes the steps 216 and the
engaging groove 27, and the fan 50 includes the rim 512 and the
legs 514 with hooks 515. Thus, additional screws are not required
to stably mount the fan 50 on the heat sink 20, which simplifies
structure of the heat dissipation apparatus. Furthermore, the heat
sink 20 includes the fixing recesses 25, and the fan 50 includes
the fixing arms 517 respectively fixed in the fixing recesses 25,
which prevents the fan 50 from rotating after assembly, and is
favorable to orient the fan 50 so that it can be properly assembled
to the heat sink 20.
[0028] Moreover, the first and second fins 211, 231 of the first
and second fin assemblies 21, 23 extend out from the heat
conductive core 40 in a radial pattern. The airflow produced by the
fan 50 is easily guided toward other heat generating electronic
components around the heat sink 20 through the airflow channels
212, 232 between the first and second fins 211, 231. Thus, the heat
dissipation apparatus not only takes heat away from the heat sink
20, but also dissipates heat from the heat generating electronic
components around the heat sink 20.
[0029] It is believed that the disclosure and its advantages will
be understood from the foregoing description, and it will be
apparent that various changes may be made thereto without departing
from the spirit and scope of the invention or sacrificing all of
its material advantages, the examples hereinbefore described merely
being preferred or exemplary embodiments of the invention.
* * * * *