U.S. patent application number 14/675119 was filed with the patent office on 2015-12-31 for heat dissipating fin assembly.
The applicant listed for this patent is DELTA ELECTRONICS, INC.. Invention is credited to Chih-Hsiang CHANG, Shih-Chou CHEN, Shu-Cheng YANG.
Application Number | 20150377564 14/675119 |
Document ID | / |
Family ID | 54930107 |
Filed Date | 2015-12-31 |
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United States Patent
Application |
20150377564 |
Kind Code |
A1 |
YANG; Shu-Cheng ; et
al. |
December 31, 2015 |
HEAT DISSIPATING FIN ASSEMBLY
Abstract
A heat dissipating fin assembly includes a bottom plate, a
plurality of first heat dissipating fins, a plurality of second
heat dissipating fins, an inner cover plate and an outer cover
plate. The first heat dissipating fins extend from an inner end to
an outer end. The second heat dissipating fins are located between
two of the first heat dissipating fins. The inner cover plate is
disposed at the inner end and connected to the first heat
dissipating fins. The outer cover plate is disposed at the outer
end and connected to the second heat dissipating fins. The outer
cover plate and the inner cover plate are separated so as to form
an opening. The second heat dissipating fins extend from around the
opening to the outer end. The length of the first heat dissipating
fins is larger than that of the second heat dissipating fins.
Inventors: |
YANG; Shu-Cheng; (Taoyuan
City, TW) ; CHANG; Chih-Hsiang; (Taoyuan City,
TW) ; CHEN; Shih-Chou; (Taoyuan City, TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
DELTA ELECTRONICS, INC. |
Taoyuan City |
|
TW |
|
|
Family ID: |
54930107 |
Appl. No.: |
14/675119 |
Filed: |
March 31, 2015 |
Current U.S.
Class: |
165/185 |
Current CPC
Class: |
F28F 2215/04 20130101;
F28F 2250/08 20130101; F04D 29/5826 20130101; F28F 19/00 20130101;
F28F 3/02 20130101; F04D 17/16 20130101 |
International
Class: |
F28F 3/02 20060101
F28F003/02 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 27, 2014 |
TW |
103122426 |
Claims
1. A heat dissipating fin assembly suitable for a fan, wherein the
heat dissipating fin assembly has an inner end adjacent to the fan
and an outer end away from the fan, the heat dissipating fin
assembly comprising: a bottom plate; a plurality of first heat
dissipating fins disposed on the bottom plate side by side and
extending from the inner end to the outer end; a plurality of
second heat dissipating fins disposed on the bottom plate and
located between two of the first heat dissipating fins; an inner
cover plate disposed at the inner end and connected to one side of
the first heat dissipating fins away from the bottom plate; and an
outer cover plate disposed at the outer end and connected to one
side of the second heat dissipating fins away from the bottom
plate, wherein the outer cover plate and the inner cover plate are
separated so as to form an opening; wherein, the second heat
dissipating fins extend from around the opening to the outer end,
and the length of the first heat dissipating fins is larger than
that of the second heat dissipating fins.
2. The heat dissipating fin assembly of claim 1, wherein each of
the second heat dissipating fins has a slant edge corresponding to
the position of the opening, and the slant edge extends obliquely
and upwardly from the inner end to the outer end.
3. The heat dissipating fin assembly of claim 1, wherein the fan is
a centrifugal fan.
4. The heat dissipating fin assembly of claim 1, wherein any
adjacent two of the first heat dissipating fins are interposed with
one of the second heat dissipating fins.
5. The heat dissipating fin assembly of claim 1, wherein any
adjacent two of the first heat dissipating fins are interposed with
at least two of the second heat dissipating fins.
6. The heat dissipating fin assembly of claim 1, wherein any
adjacent two of the first heat dissipating fins are interposed with
different amount of the second heat dissipating fins.
7. The heat dissipating fin assembly of claim 1, wherein a hole is
configured on a side wall of a fan frame of the fan adjacent to an
outlet.
8. The heat dissipating fin assembly of claim 7, wherein any
adjacent two of the first heat dissipating fins located close to
the hole are interposed with less amount of the second heat
dissipating fins, while any adjacent two of the first heat
dissipating fins located away from the hole are interposed with
greater amount of the second heat dissipating fins.
9. A heat dissipating fin assembly suitable for a fan, wherein the
heat dissipating fin assembly has an inner end adjacent to the fan
and an outer end away from the fan, the heat dissipating fin
assembly comprising: a plurality of first heat dissipating fins,
wherein each of the first heat dissipating fins comprises a first
fin body, a first bottom extension portion, a first inner cover
extension portion and a first outer cover extension portion, the
first bottom extension portion turns and extends from the first fin
body, the first inner cover extension portion is disposed at the
inner end and connected to one side of the first fin body away from
the first bottom extension portion, and the first outer cover
extension portion is disposed at the outer end and connected to one
side of the first fin body away from the first bottom extension
portion; and a plurality of second heat dissipating fins, wherein
each of the second heat dissipating fins comprises a second fin
body, a second bottom extension portion and a second outer cover
extension portion, the second bottom extension portion turns and
extends from the second fin body, the second outer cover extension
portion is disposed at the outer end and connected to one side of
the second fin body away from the second bottom extension portion;
wherein, the length of the first heat dissipating fins is larger
than that of the second heat dissipating fins, the second heat
dissipating fins and the first heat dissipating fins are arranged
side by side, and the first inner cover extension portions, the
first outer cover extension portions and the second outer cover
extension portions form an opening.
10. The heat dissipating fin assembly of claim 9, wherein each of
the second fin bodies has a slant edge corresponding to the
position of the opening, and the slant edge extends obliquely and
upwardly from the inner end to the outer end.
11. The heat dissipating fin assembly of claim 9, wherein the fan
is a centrifugal fan.
12. The heat dissipating fin assembly of claim 9, wherein any
adjacent two of the first heat dissipating fins are interposed with
one of the second heat dissipating fins.
13. The heat dissipating fin assembly of claim 9, wherein any
adjacent two of the first heat dissipating fins are interposed with
at least two of the second heat dissipating fins.
14. The heat dissipating fin assembly of claim 9, wherein any
adjacent two of the first heat dissipating fins are interposed with
different amount of the second heat dissipating fins.
15. The heat dissipating fin assembly of claim 9, wherein a hole is
configured on a side wall of a fan frame of the fan adjacent to an
outlet.
16. The heat dissipating fin assembly of claim 15, wherein any
adjacent two of the first heat dissipating fins located close to
the hole are interposed with less amount of the second heat
dissipating fins, while any adjacent two of the first heat
dissipating fins located away from the hole are interposed with
greater amount of the second heat dissipating fins.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This Non-provisional application claims priority under 35
U.S.C. .sctn.119(a) on Patent Application No(s). 103122426 filed in
Taiwan, Republic of China on Jun. 27, 2014, the entire contents of
which are hereby incorporated by reference.
BACKGROUND OF THE INVENTION
[0002] 1. Field of Invention
[0003] The present invention relates to a heat dissipating fin
assembly and, in particular, to a heat dissipating fin assembly
with dusting function.
[0004] 2. Related Art
[0005] The electronic products are developed with higher
performance, higher frequency, higher speed, and lighter and
thinner structure. However, these features make the internal
temperature of the electronic products become higher and higher,
which may cause the product unstable and thus affect the
reliability of the products. Therefore, the existing electronic
products are usually equipped with a fan to dissipate the generated
heat.
[0006] Regarding to a common heat-dissipating fan, the outlet of
the fan located adjacent to the heat dissipating fin assembly will
accumulate with great amount of dusts, which may come from the air.
The accumulated dust can sufficiently affect the rotation speed and
heat dissipating efficiency of the heat-dissipating fan.
[0007] Therefore, it is an important subject to provide a heat
dissipating fin assembly which can provide a dusting function
easily so as to improve the heat dissipating efficiency.
SUMMARY OF THE INVENTION
[0008] In view of the foregoing subject, an objective of the
present invention is to provide a heat dissipating fin assembly
which can provide a dusting function easily so as to improve the
heat dissipating efficiency.
[0009] To achieve the above objective, the present invention
discloses a heat dissipating fin assembly suitable for a fan, which
includes a bottom plate, a plurality of first heat dissipating
fins, a plurality of second heat dissipating fins, an inner cover
plate and an outer cover plate. The heat dissipating fin assembly
has an inner end adjacent to the fan and an outer end away from the
fan. The first heat dissipating fins are disposed on the bottom
plate side by side and extend from the inner end to the outer end.
The second heat dissipating fins are disposed on the bottom plate
and located between two of the first heat dissipating fins. The
inner cover plate is disposed at the inner end and connected to one
side of the first heat dissipating fins away from the bottom plate.
The outer cover plate is disposed at the outer end and connected to
one side of the second heat dissipating fins away from the bottom
plate. The outer cover plate and the inner cover plate are
separated so as to form an opening. The second heat dissipating
fins extend from around the opening to the outer end, and the
length of the first heat dissipating fins is larger than that of
the second heat dissipating fins.
[0010] In one embodiment, each of the second heat dissipating fins
has a slant edge corresponding to the position of the opening, and
the slant edge extends obliquely and upwardly from the inner end to
the outer end.
[0011] In one embodiment, the fan is a centrifugal fan.
[0012] In one embodiment, any adjacent two of the first heat
dissipating fins are interposed with one of the second heat
dissipating fins.
[0013] In one embodiment, any adjacent two of the first heat
dissipating fins are interposed with at least two of the second
heat dissipating fins.
[0014] In one embodiment, any adjacent two of the first heat
dissipating fins are interposed with different amount of the second
heat dissipating fins.
[0015] In one embodiment, a hole is configured on a side wall of a
fan frame of the fan adjacent to an outlet.
[0016] In one embodiment, any adjacent two of the first heat
dissipating fins located close to the hole are interposed with less
amount of the second heat dissipating fins, while any adjacent two
of the first heat dissipating fins located away from the hole are
interposed with greater amount of the second heat dissipating
fins.
[0017] To achieve the above objective, the present invention also
discloses a heat dissipating fin assembly suitable for a fan, which
includes a plurality of first heat dissipating fins and a plurality
of second heat dissipating fins. The heat dissipating fin assembly
has an inner end adjacent to the fan and an outer end away from the
fan. Each of the first heat dissipating fins includes a first fin
body, a first bottom extension portion, a first inner cover
extension portion and a first outer cover extension portion. The
first bottom extension portion turns and extends from the first fin
body. The first inner cover extension portion is disposed at the
inner end and connected to one side of the first fin body away from
the first bottom extension portion. The first outer cover extension
portion is disposed at the outer end and connected to one side of
the first fin body away from the first bottom extension portion.
Each of the second heat dissipating fins includes a second fin
body, a second bottom extension portion and a second outer cover
extension portion. The second bottom extension portion turns and
extends from the second fin body. The second outer cover extension
portion is disposed at the outer end and connected to one side of
the second fin body away from the second bottom extension portion.
The length of the first heat dissipating fins is larger than that
of the second heat dissipating fins. The second heat dissipating
fins and the first heat dissipating fins are arranged side by side.
The first inner cover extension portions, the first outer cover
extension portions and the second outer cover extension portions
form an opening.
[0018] In one embodiment, each of the second fin bodies has a slant
edge corresponding to the position of the opening, and the slant
edge extends obliquely and upwardly from the inner end to the outer
end.
[0019] In one embodiment, the fan is a centrifugal fan.
[0020] In one embodiment, any adjacent two of the first heat
dissipating fins are interposed with one of the second heat
dissipating fins.
[0021] In one embodiment, any adjacent two of the first heat
dissipating fins are interposed with at least two of the second
heat dissipating fins.
[0022] In one embodiment, any adjacent two of the first heat
dissipating fins are interposed with different amount of the second
heat dissipating fins.
[0023] In one embodiment, a hole is configured on a side wall of a
fan frame of the fan adjacent to an outlet.
[0024] In one embodiment, any adjacent two of the first heat
dissipating fins located close to the hole are interposed with less
amount of the second heat dissipating fins, while any adjacent two
of the first heat dissipating fins located away from the hole are
interposed with greater amount of the second heat dissipating
fins.
[0025] As mentioned above, the inner end of the heat dissipating
fin assembly of the invention has lower density of heat dissipating
structure (the first heat dissipating fins), and the outer end of
the heat dissipating fin assembly has higher density of heat
dissipating structure (including the first and second heat
dissipating fins). The lower density heat dissipating structure at
the inner end can avoid the accumulation of dusts, and the higher
density heat dissipating structure at the outer end can maintain a
larger heat dissipating surface area. The heat dissipating fin
assembly further includes an inner cover plate and an outer cover
plate, and an opening is defined between the inner and outer cover
plates. As a result, the dusts can be exhausted through the
opening, thereby achieving the effects of dusting and improved heat
dissipating efficiency.
[0026] In another embodiment, the inner end of the heat dissipating
fin assembly has lower density of heat dissipating structure (the
first fin bodies), and the outer end of the heat dissipating fin
assembly has higher density of heat dissipating structure
(including the first and second fin bodies). In addition, the first
inner cover extension portion, the first outer cover extension
portion and the second outer cover extension portion form an
opening. This configuration can also provide a lower density heat
dissipating structure at the inner end to avoid the accumulation of
dusts, and a higher density heat dissipating structure at the outer
end to maintain a larger heat dissipating surface area. Besides,
the dusts entering the heat dissipating fin assembly through the
inner end can be ejected via the opening.
BRIEF DESCRIPTION OF THE DRAWINGS
[0027] The present invention will become more fully understood from
the subsequent detailed description and accompanying drawings,
which are given by way of illustration only, and thus are not
limitative of the present invention, and wherein:
[0028] FIG. 1 is a schematic diagram showing an assembled heat
dissipating device according to an embodiment of the invention;
[0029] FIG. 2 is an exploded view of the heat dissipating device of
FIG. 1;
[0030] FIG. 3 is a schematic diagram showing a part of the
assembled heat dissipating device of FIG. 1;
[0031] FIG. 4A is a sectional diagram of the heat dissipating
device of FIG. 3 along the line A-A;
[0032] FIG. 4B is a schematic diagram showing the operation of the
heat dissipating device of FIG. 4A;
[0033] FIG. 5A is a sectional diagram of another aspect of the heat
dissipating device of FIG. 4A;
[0034] FIG. 5B is a schematic diagram showing the operation of the
heat dissipating device of FIG. 5A;
[0035] FIG. 6A is a sectional diagram of another aspect of the heat
dissipating device of FIG. 4A;
[0036] FIG. 6B is a schematic diagram showing the operation of the
heat dissipating device of FIG. 6A;
[0037] FIG. 7A is a sectional diagram of another aspect of the heat
dissipating device of FIG. 4A;
[0038] FIG. 7B is a schematic diagram showing the operation of the
heat dissipating device of FIG. 7A;
[0039] FIG. 8 is a schematic diagram showing the operation of the
shielding member of FIG. 3;
[0040] FIG. 9 is a schematic diagram showing a part of an assembled
heat dissipating device according to another embodiment of the
invention;
[0041] FIG. 10A is a schematic diagram showing a heat dissipating
fin assembly according to an embodiment of the invention;
[0042] FIG. 10B is a schematic diagram showing an aspect of the
heat dissipating fin assembly of FIG. 10A in cooperated with a
fan;
[0043] FIG. 10C is a schematic diagram showing another aspect of
the heat dissipating fin assembly of FIG. 10A in cooperated with a
fan;
[0044] FIG. 10D is a schematic diagram showing another aspect of
the heat dissipating fin assembly of FIG. 10A;
[0045] FIG. 10E is a schematic diagram showing another aspect of
the heat dissipating fin assembly of FIG. 10A;
[0046] FIG. 11A is a schematic diagram showing another aspect of
the heat dissipating fin assembly of FIG. 10A;
[0047] FIG. 11B is a schematic diagram showing another aspect of
the heat dissipating fin assembly of FIG. 11A;
[0048] FIG. 11C is a schematic diagram showing another aspect of
the heat dissipating fin assembly of FIG. 11A;
[0049] FIG. 12A is a schematic diagram showing a part of an
assembled heat dissipating device according to another embodiment
of the invention; and
[0050] FIG. 12B is a schematic diagram showing a part of an
assembled heat dissipating device according to another embodiment
of the invention.
DETAILED DESCRIPTION OF THE INVENTION
[0051] The present invention will be apparent from the following
detailed description, which proceeds with reference to the
accompanying drawings, wherein the same references relate to the
same elements.
[0052] FIG. 1 is a schematic diagram showing an assembled heat
dissipating device la according to an embodiment of the invention,
FIG. 2 is an exploded view of the heat dissipating device 1a of
FIG. 1, and FIG. 3 is a schematic diagram showing a part of the
assembled heat dissipating device 1a of FIG. 1. Referring to FIGS.
1 and 2, the heat dissipating device 1a of this embodiment includes
a fan F, a heat dissipating fin assembly 14 and a block 15. The fan
F includes a fan frame 11, an impeller 12 and a motor 13. The motor
13 is disposed in the fan frame 11. The impeller is mounted on the
motor 13, so that the motor 13 is connected to the impeller 12 and
drives it to rotate. The fan frame 11 has an inlet 111 and an
outlet 112. The heat dissipating fin assembly 14 is disposed at the
position of the outlet 112 for dissipating heat. The heat
dissipating fin assembly 14 is composed of a plurality of heat
dissipating fins 141, which are arranged side by side, and any two
of the heat dissipating fins 141 form a heat dissipating channel C.
Accordingly, the heat dissipating fin assembly 14 has a plurality
of heat dissipating channel C for dissipating heat from the heat
dissipating device 1a. In practice, since the air usually contains
a lot of dusts, the dusts may be accumulated at one side of the
heat dissipating fin assembly 14 adjacent to the impeller 12 when
the air in the heat dissipating device 1a flows through the heat
dissipating fin assembly 14. In other words, the dusts accumulate
at the joint position of the outlet 112 and the heat dissipating
fin assembly 14.
[0053] The invention will be described in detail with reference to
FIGS. 2 and 3 hereinafter, wherein some components (a part of the
fan frame) are omitted in FIG. 3 for making the illustration more
clear. In order to perform a dusting process, the block 15 of the
embodiment shields the heat dissipating channels C, so that the air
cannot be exhausted through the heat dissipating channels C. In
practice, the block 15 can movably connect with the heat
dissipating fin assembly 14, and the detailed aspects thereof will
be discussed later. Of course, the block 15 may not connect with
the heat dissipating fin assembly 14. That is, the block 15 is an
independent component disposed close to the heat dissipating fin
assembly 14 for shielding the heat dissipating channels C.
Alternatively, the block 15 can be a part of another device that
can also be disposed close to the heat dissipating channels C for
shielding them.
[0054] Referring to FIG. 3, a hole O1 is configured on a side wall
S of the fan frame 11 adjacent to the outlet 112. Since the block
15 blocks the air inside the heat dissipating device 1a, the air
will flow within the heat dissipating device 1a continuously so as
to from a higher pressure zone. At the same time, the hole O1
connecting to the outside of the heat dissipating device 1a forms a
lower pressure zone. Thus, the air naturally flows from the higher
pressure zone to the lower pressure zone so as to blow the dusts
accumulated at the joint position of the outlet 112 and the heat
dissipating fin assembly 14 to the hole O1, thereby exhausting the
dusts through the hole O1 and thus achieving the goal of
dusting.
[0055] FIG. 4A is a sectional diagram of the heat dissipating
device 1a of FIG. 3 along the line A-A, and FIG. 4B is a schematic
diagram showing the operation of the heat dissipating device 1a of
FIG. 4A. Referring to FIGS. 4A and 4B, the block 15 is movably
connected with the heat dissipating fin assembly 14, so it can move
between a first open position PO1 and a first close position PC1.
When the block 15a is located at the first closing position PC1
(see FIG. 5A), the block 15 shields the heat dissipating channels C
of the heat dissipating fin assembly 14 (see FIG. 2) so as to stop
the air in the heat dissipating device 1a from flowing through the
heat dissipating channels C.
[0056] FIG. 5A is a sectional diagram of another aspect of the heat
dissipating device of FIG. 4A, and FIG. 5B is a schematic diagram
showing the operation of the heat dissipating device of FIG. 5A.
Referring to FIGS. 5A and 5B, different from the previous aspect as
shown in FIG. 4A, the block 15a is a sliding cap structure, which
includes a track and a cap. Accordingly, the cap can be controlled
by hand or circuit to slide along the track to shield the heat
dissipating fin assembly 14.
[0057] FIG. 6A is a sectional diagram of another aspect of the heat
dissipating device of FIG. 4A, and FIG. 6B is a schematic diagram
showing the operation of the heat dissipating device of FIG. 6A.
Referring to FIGS. 6A and 6B, different from the previous aspect as
shown in FIG. 4A, the block 15b is a rolling door structure, which
can be controlled by hand or circuit to move downwardly for
shielding the heat dissipating fin assembly 14. The other related
descriptions can be referred to the above aspects, so the detailed
description thereof will be omitted.
[0058] FIG. 7A is a sectional diagram of another aspect of the heat
dissipating device of FIG. 4A, and FIG. 7B is a schematic diagram
showing the operation of the heat dissipating device of FIG. 7A.
Referring to FIGS. 7A and 7B, different from the previous aspect as
shown in FIG. 4A, the block 15c is a shutter structure, which can
be controlled by hand or circuit to rotate downwardly for shielding
the heat dissipating fin assembly 14. The other related
descriptions can be referred to the above aspects, so the detailed
description thereof will be omitted.
[0059] In this embodiment, the block 15, 15a, 15b or 15c shields
one side of the heat dissipating fin assembly 14 away from the
impeller 12. In more detailed, the block 15, 15a, 15b or 15c can
shield the outlets of the heat dissipating channels C. In other
embodiments, the block 15, 15a, 15b or 15c may shield one side of
the heat dissipating fin assembly 14 adjacent to the impeller 12.
That is, the block 15, 15a, 15b or 15c can shield the inlets of the
heat dissipating channels C. No matter the block 15, 15a, 15b or
15c shields the inlets or outlets of the heat dissipating channels
C, the air can be blocked inside the heat dissipating device 1a and
cannot be exhausted through the heat dissipating channels C.
Furthermore, the configuration of the hole can provide an excellent
dusting effect.
[0060] Referring to FIG. 3 again, if the impeller 12 rotates
clockwise and the outlet 112 faces downwardly, the hole O1 is
located at a left side of the side wall S and adjacent to the
outlet 112. Accordingly, the dusts accumulated at the joint
position of the outlet 112 and the heat dissipating fin assembly 14
can be swept by the clockwise airflow and exhausted through the
hole O1, thereby achieving the desired dusting effect.
[0061] In this embodiment, the heat dissipating device 1a further
includes a shielding member 16 moveably connected to the edge of
the hole O1. In more detailed, the shielding member 16 is disposed
at a position of the side wall S adjacent to the hole O1. The
shielding member 16 is movable between the second open position PO2
and the second close position PC2 (see FIG. 8). When the shielding
member 16 is located at the second close position PC2, the
shielding member 16 shields the hole O1. Herein, FIG. 8 is a
schematic diagram showing the operation of the shielding member 16
of FIG. 3. In addition, the shielding member 16 can also be
controlled by hand or circuit to move between the second open
position PO2 (see FIG. 3) and the second close position PC2.
[0062] In practice, if the heat dissipating device 1a needs a
dusting procedure, the block 15 is controlled to shield the heat
dissipating channels C of the heat dissipating fin assembly 14
while the shielding member 16 does not shield the hole O1.
Accordingly, the dusts accumulated at the joint position of the
outlet 112 and the heat dissipating fin assembly 14 are blew to the
hole O1, thereby exhausting the dusts through the hole O1 and thus
achieving the goal of dusting. Regarding to the aspect as shown in
FIGS. 4A, 5A, 6A or 7A, when the heat dissipating device 1a needs a
dusting procedure, the block 15, 15a, 15b or 15c moves to the first
close position PC1 while the shielding member 16 is located at the
second open position PO2 (see FIG. 3).
[0063] If the heat dissipating device 1a is in a normal operation
and does not perform a dusting procedure, as shown in FIG. 8, the
block 15 does not shield the heat dissipating channels C of the
heat dissipating fin assembly 14 (see FIG. 2) while the shielding
member 16 shields the hole O1. Regarding to the aspect as shown in
FIGS. 4B, 5B, 6B or 7B, when the heat dissipating device 1a does
not perform a dusting procedure, the block 15, 15a, 15b or 15c
moves to the first open position PO1 while the shielding member 16
is located at the second close position PC2 (see FIG. 8).
Accordingly, the heat dissipating device 1a can dissipating heated
airflow through the heat dissipating channels C of the heat
dissipating fin assembly 14.
[0064] FIG. 9 is a schematic diagram showing a part of an assembled
heat dissipating device 1b according to another embodiment of the
invention. Different from the heat dissipating device 1a of the
previous embodiment as shown in FIG. 3, the impeller 12 of the heat
dissipating device 1b rotates counterclockwise, so that the hole O2
is located at the right side of the side wall S. In other words,
when the impeller 12 rotates counterclockwise and the outlet 112
faces downwardly, the hole O2 is located at the right side of the
side wall S and adjacent to the outlet 112. Accordingly, the dusts
accumulated at the joint position of the outlet 112 and the heat
dissipating fin assembly 14 can be swept by the counterclockwise
airflow and exhausted through the hole O2. The other related
descriptions can be referred to the above embodiment, so the
detailed description thereof will be omitted. To be noted, the fan
frame 11 may include both of the hole O1 disposed at the left side
of the side wall S (see FIG. 3) and the hole O2 disposed at the
right side of the side wall S (see FIG. 8) in cooperating with
different rotation directions of the impeller 12 for performing
dusting procedure.
[0065] FIG. 10A is a schematic diagram showing a heat dissipating
fin assembly 14a according to an embodiment of the invention, and
FIG. 10B is a schematic diagram showing an aspect of the heat
dissipating fin assembly 14a of FIG. 10A in cooperated with a fan.
Referring to FIGS. 10A and 10B, the heat dissipating fin assembly
14a of this embodiment is in cooperating with a fan F so as to form
a heat dissipating device 1c. Herein, the fan F is preferably a
centrifugal fan. The heat dissipating fin assembly 14a includes a
bottom plate 142, a plurality of first heat dissipating fins 1411,
a plurality of second heat dissipating fins 1412, an inner cover
plate 143 and an outer cover plate 144. The heat dissipating fin
assembly 14a has an inner end E1 close to the fan F and an outer
end E2 away from the fan F. The first heat dissipating fins 1411
are disposed on the bottom plate 142 side by side and extend from
an inner end E1 to an outer end E2. The second heat dissipating
fins 1412 are disposed on the bottom plate 142 side by side and
located between two first heat dissipating fins 1411, respectively.
In more detailed, adjacent two first heat dissipating fins 1411 are
interposed with a second heat dissipating fin 1412. The inner cover
plate 143 is disposed at the inner end E1 and connected to one side
of the first heat dissipating fins 1411 away from the bottom plate
142. The outer cover plate 144 is disposed at the outer end E2 and
connected to one side of the second heat dissipating fins 1412 away
from the bottom plate 142. The outer cover plate 144 and the inner
cover plate 143 are separated so as to form an opening O3, and the
second heat dissipating fins 1412 extend from around the opening O3
to the outer end E2. The length of the first heat dissipating fins
1411 is larger than that of the second heat dissipating fins 1412.
Herein, the "length" represents the length of the first heat
dissipating fins 1411 or the second heat dissipating fins 1412 in
the direction from the inner end E1 to the outer end E2. According
to the above structure, the inner end E1 of the heat dissipating
fin assembly 14a has lower density of heat dissipating structure
(the first heat dissipating fins), and the outer end E2 of the heat
dissipating fin assembly 14a has higher density of heat dissipating
structure (including the first and second heat dissipating fins).
The lower density heat dissipating structure at the inner end E1
can avoid the accumulation of dusts at the joint between the heat
dissipating fin assembly 14a and the outlet 112, and the higher
density heat dissipating structure at the outer end E2 can maintain
a larger heat dissipating surface area. The dusts entering the heat
dissipating fin assembly 14a through the inner end E1 can be
exhausted through the opening O3, thereby achieving the effects of
dusting and improved heat dissipating efficiency.
[0066] In this embodiment, the second heat dissipating fin 1412 has
a slant edge L corresponding to the position of the opening O3. The
slant edge L extends obliquely and upwardly from the inner end E1
to the outer end E2. Accordingly, the dusts can be more easily
ejected, along the slant edge L, through the opening O3.
[0067] FIG. 10C is a schematic diagram showing another aspect of
the heat dissipating fin assembly 14a of FIG. 10A in cooperated
with a fan. Different from the previous embodiment (the heat
dissipating device 1c of FIG. 10B), the side wall S of the fan F1
has a hole O1 and the block 15 is disposed at the outer end E2 of
the heat dissipating fin assembly 14a. The block 15 shields the
heat dissipating channels of the heat dissipating fin assembly 14a,
so that the dusts accumulated at the joint position of the outlet
112 and the heat dissipating fin assembly 14a are blew to the hole
O1. In addition, the dusts entering the heat dissipating fin
assembly 14a through the inner end E1 of the heat dissipating fin
assembly 14a can be exhausted through the opening O3, thereby
achieving a double dusting effect. The other related descriptions
can be referred to the above embodiments, so the detailed
description thereof will be omitted.
[0068] FIG. 10D is a schematic diagram showing another aspect of
the heat dissipating fin assembly of FIG. 10A in cooperated with a
fan. Different from the heat dissipating fin assembly 14a of FIG.
10A, in the heat dissipating fin assembly 14b of this aspect,
adjacent two first heat dissipating fins 1411 are interposed with
at least two of the second heat dissipating fins 1412. Of course,
adjacent two first heat dissipating fins 1411 can be interposed
with more second heat dissipating fins 1412. Accordingly, a larger
interval can be formed around the inner end E1, so that the dusts
entering the heat dissipating fin assembly 14b can be more easily
ejected through the opening O3.
[0069] FIG. 10E is a schematic diagram showing another aspect of
the heat dissipating fin assembly of FIG. 10A in cooperated with a
fan. Different from the heat dissipating fin assembly 14a of FIG.
10A, in the heat dissipating fin assembly 14c of this aspect,
adjacent two first heat dissipating fins 1411 are interposed with
different amount of the second heat dissipating fins 1412. As shown
in FIG. 10E, some adjacent two first heat dissipating fins 1411 are
interposed with two second heat dissipating fins 1412, and some
adjacent two first heat dissipating fins 1411 are interposed with
three second heat dissipating fins 1412. Of course, the amount or
amounts of the interposed second heat dissipating fins 1412 and the
configuration between the first heat dissipating fins 1411 and the
second heat dissipating fins 1412 can be modified based on the
actual needs.
[0070] FIG. 11A is a schematic diagram showing another aspect of
the heat dissipating fin assembly of FIG. 10A. Different from the
heat dissipating fin assembly 14a of FIG. 10A, the heat dissipating
fin assembly 14d of this aspect includes a plurality of first heat
dissipating fins 1411 and a plurality of second heat dissipating
fins 1412. Each of the first heat dissipating fins 1411 includes a
first fin body 14111, a first bottom extension portion 14112, a
first inner cover extension portion 14113 and a first outer cover
extension portion 14114. The first bottom extension portion 14112
turns and extends from the first fin body 14111. The first inner
cover extension portion 14113 is disposed at the inner end E1 and
connected to one side of the first fin body 14111 away from the
first bottom extension portion 14112. The first outer cover
extension portion 14114 is disposed at the outer end E2 and
connected to one side of the first fin body 14111 away from the
first bottom extension portion 14112. Each of the second heat
dissipating fins 1412 includes a second fin body 14121, a second
bottom extension portion 14122 and a second outer cover extension
portion 14124. The second bottom extension portion 14122 turns and
extends from the second fin body 14121. The second outer cover
extension portion 14124 is disposed at the outer end E2 and
connected to one side of the second fin body 14121 away from the
second bottom extension portion 14122.
[0071] In this embodiment, the length of the first heat dissipating
fins 1411 is larger than that of the second heat dissipating fins
1412. Herein, the "length" represents the length of the first heat
dissipating fins 1411 or the second heat dissipating fins 1412 in
the direction from the inner end E1 to the outer end E2. Herein,
the first heat dissipating fins 1411 and the second heat
dissipating fins 1412 are arranged side by side, and two adjacent
first heat dissipating fins 1411 are interposed with one second
heat dissipating fin 1412, for example. In practice, the heat
dissipating fins 1411 and the second heat dissipating fins 1412 are
arranged side by side through a riveting method. Due to the above
side-by-side structure, the first inner cover extension portion
14113, the first outer cover extension portion 14114 and the second
outer cover extension portion 14124 can form an opening O4.
According to the above structure, the inner end E1 of the heat
dissipating fin assembly 14d has lower density of heat dissipating
structure (the first fin bodies), and the outer end E2 of the heat
dissipating fin assembly 14d has higher density of heat dissipating
structure (including the first and second fin bodies). The lower
density heat dissipating structure at the inner end E1 can avoid
the accumulation of dusts, and the higher density heat dissipating
structure at the outer end E2 can maintain a larger heat
dissipating surface area. The dusts entering the heat dissipating
fin assembly 14dthrough the inner end E1 can be exhausted through
the opening O4, thereby achieving the effects of dusting and
improved heat dissipating efficiency.
[0072] Similarly, in this embodiment, the second fin body 14121 has
a slant edge L corresponding to the position of the opening O4. The
slant edge L extends obliquely and upwardly from the inner end E1
to the outer end E2. Accordingly, the dusts entering the heat
dissipating fin assembly 14d can be more easily ejected, along the
slant edge L, through the opening O4.
[0073] FIG. 11B is a schematic diagram showing another aspect of
the heat dissipating fin assembly of FIG. 11A. Different from the
heat dissipating fin assembly 14d of FIG. 11A, in the heat
dissipating fin assembly 14e of this aspect, adjacent two first
heat dissipating fins 1411 are interposed with two second heat
dissipating fins 1412. Of course, adjacent two first heat
dissipating fins 1411 can be interposed with more second heat
dissipating fins 1412. Accordingly, a larger interval can be formed
around the inner end E1 of the fan, so that the dusts entering the
heat dissipating fin assembly 14e can be more easily ejected
through the opening O4.
[0074] FIG. 11C is a schematic diagram showing another aspect of
the heat dissipating fin assembly of FIG. 11A. Different from the
heat dissipating fin assembly 14e of FIG. 11B, in the heat
dissipating fin assembly 14f of this aspect, adjacent two first
heat dissipating fins 1411 are interposed with different amount of
the second heat dissipating fins 1412. As shown in FIG. 11C, some
adjacent two first heat dissipating fins 1411 are interposed with
two second heat dissipating fins 1412, and some adjacent two first
heat dissipating fins 1411 are interposed with three second heat
dissipating fins 1412. Of course, the amount or amounts of the
interposed second heat dissipating fins 1412 and the configuration
between the first heat dissipating fins 1411 and the second heat
dissipating fins 1412 can be modified based on the actual
needs.
[0075] FIG. 12A is a schematic diagram showing a part of an
assembled heat dissipating device according to another embodiment
of the invention. Referring to FIG. 12A, the heat dissipating fin
assembly 14g is cooperated with the fan F1 of FIG. 10C so as to
form a heat dissipating device 1e. The description of the fan F1
can be referred to the above aspects. Different from the heat
dissipating fin assembly 14a of FIG. 10C, in the heat dissipating
fin assembly 14g, adjacent two of the first heat dissipating fins
1411 located close to the hole O1 are interposed with less amount
of the second heat dissipating fins 1412, while adjacent two of the
first heat dissipating fins 1411 located away from the hole O1 are
interposed with greater amount of the second heat dissipating fins
1412. Since the hole O1 can provide the dusting function, which
means the position close to the hole O1 has better dusting ability,
it is possible to arrange the first heat dissipating fins 1411 with
the higher density around the hole O1. On the contrary, the
position away from the hole O1 has poor dusting ability, so dusts
may accumulate at the joint position between the outlet 112 and the
heat dissipating fin assembly 14g. Accordingly, this invention is
to configure more second heat dissipating fins 1412 between the
adjacent first heat dissipating fins 1411 (higher density) around
the joint position, so that the dusts entering the heat dissipating
fin assembly 14g can be ejected via the opening O3 more easily,
thereby improving the dusting ability at the position away from the
hole O1.
[0076] FIG. 12B is a schematic diagram showing a part of an
assembled heat dissipating device according to another embodiment
of the invention. Referring to FIG. 12B, the heat dissipating fin
assembly 14h is cooperated with the fan F1 of FIG. 10C. The
description of the fan F1 can be referred to the above aspects.
Different from the heat dissipating fin assembly 14d of FIG. 11A,
in the heat dissipating fin assembly 14h, adjacent two of the first
heat dissipating fins 1411 located close to the hole O1 are
interposed with less amount of the second heat dissipating fins
1412, while adjacent two of the first heat dissipating fins 1411
located away from the hole O1 are interposed with greater amount of
the second heat dissipating fins 1412. Since the hole O1 can
provide the dusting function, which means the position close to the
hole O1 has better dusting ability, it is possible to arrange the
first heat dissipating fins 1411 with the higher density around the
hole O1. On the contrary, the position away from the hole O1 is
hard to perform dusting procedure by the hole O1, which means the
position away from the hole O1 has poor dusting ability, so dusts
may accumulate at the joint position between the outlet 112 and the
heat dissipating fin assembly 14h. Accordingly, this invention is
to configure more second heat dissipating fins 1412 between the
adjacent first heat dissipating fins 1411 (higher density) around
the joint position, so that the dusts entering the heat dissipating
fin assembly 14h can be ejected via the opening O4 more easily,
thereby improving the dusting ability at the position away from the
hole O1.
[0077] In summary, the inner end of the heat dissipating fin
assembly of the invention has lower density of heat dissipating
structure (the first heat dissipating fins), and the outer end of
the heat dissipating fin assembly has higher density of heat
dissipating structure (including the first and second heat
dissipating fins). The lower density heat dissipating structure at
the inner end can avoid the accumulation of dusts, and the higher
density heat dissipating structure at the outer end can maintain a
larger heat dissipating surface area. The heat dissipating fin
assembly further includes an inner cover plate and an outer cover
plate, and an opening is defined between the inner and outer cover
plates. As a result, the dusts can be exhausted through the
opening, thereby achieving the effects of dusting and improved heat
dissipating efficiency.
[0078] In another embodiment, the inner end of the heat dissipating
fin assembly has lower density of heat dissipating structure (the
first fin bodies), and the outer end of the heat dissipating fin
assembly has higher density of heat dissipating structure
(including the first and second fin bodies). In addition, the first
inner cover extension portion, the first outer cover extension
portion and the second outer cover extension portion form an
opening. This configuration can also provide a lower density heat
dissipating structure at the inner end to avoid the accumulation of
dusts, and a higher density heat dissipating structure at the outer
end to maintain a larger heat dissipating surface area. Besides,
the dusts entering the heat dissipating fin assembly through the
inner end can be ejected via the opening.
[0079] Although the present invention has been described with
reference to specific embodiments, this description is not meant to
be construed in a limiting sense. Various modifications of the
disclosed embodiments, as well as alternative embodiments, will be
apparent to persons skilled in the art. It is, therefore,
contemplated that the appended claims will cover all modifications
that fall within the true scope of the present invention.
* * * * *