U.S. patent application number 14/164575 was filed with the patent office on 2015-06-25 for coaxial capillary structure and ultra-thin heat pipe structure having the same.
The applicant listed for this patent is Hao PAI. Invention is credited to Hao PAI.
Application Number | 20150176918 14/164575 |
Document ID | / |
Family ID | 51449734 |
Filed Date | 2015-06-25 |
United States Patent
Application |
20150176918 |
Kind Code |
A1 |
PAI; Hao |
June 25, 2015 |
COAXIAL CAPILLARY STRUCTURE AND ULTRA-THIN HEAT PIPE STRUCTURE
HAVING THE SAME
Abstract
A coaxial capillary structure and an ultra-thin heat pipe
structure having the same are provided. The coaxial capillary
structure is installed in an ultra-thin heat pipe and extended
towards the length direction of a pipe body of the ultra-thin heat
pipe, and includes: a primary transferring capillary part and a
coaxially-arranged capillary part, wherein the primary transferring
capillary part is composed of a plurality of fiber bundles for
forming as an integral bundle, and the coaxially-arranged capillary
part is formed through a plurality of weaving wires interwoven and
reeled at the exterior of the primary transferring capillary part,
thereby limiting each of the fiber bundles at the central portion
of the coaxially-arranged capillary part for forming a compact
structure. Accordingly, a better capillary transferring effect is
provided.
Inventors: |
PAI; Hao; (Taoyuan County,
TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
PAI; Hao |
Taoyuan County |
|
TW |
|
|
Family ID: |
51449734 |
Appl. No.: |
14/164575 |
Filed: |
January 27, 2014 |
Current U.S.
Class: |
165/104.26 |
Current CPC
Class: |
F28D 15/0233 20130101;
F28D 15/046 20130101 |
International
Class: |
F28D 15/04 20060101
F28D015/04 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 24, 2013 |
TW |
102148076 |
Claims
1. A coaxial capillary structure, which is installed in an
ultra-thin heat pipe and extended towards the length direction of a
pipe body of the ultra-thin heat pipe, including: a primary
transferring capillary part, composed of a plurality of fiber
bundles for forming as an integral bundle; and a coaxially-arranged
capillary part, formed through a plurality of weaving wires
interwoven and reeled at the exterior of the primary transferring
capillary part, thereby limiting each of the fiber bundles at the
central portion of the coaxially-arranged capillary part for
forming a compact structure.
2. The coaxial capillary structure according to claim 1, wherein
each of the fiber bundles and each of the weaving wires are made of
metal material or non-metal material of glass or carbon fibers.
3. The coaxial capillary structure according to claim 1, wherein
the material of which the fiber bundles are made is the same or
different from the material of which the weaving wires are
made.
4. The coaxial capillary structure according to claim 1, wherein
the outer diameter of the fiber bundles is smaller than the outer
diameter of the weaving wires.
5. An ultra-thin heat pipe structure having a coaxial capillary
structure, including: an ultra-thin heat pipe, having a vapor flow
channel formed inside a pipe body thereof; and a coaxial capillary
structure, installed in the pipe body of the ultra-thin heat pipe
and extended towards the length direction thereof, and including: a
primary transferring capillary part, composed of a plurality of
fiber bundles for forming as an integral bundle; and a
coaxially-arranged capillary part, formed through a plurality of
weaving wires interwoven and reeled at the exterior of the primary
transferring capillary part, thereby limiting each of the fiber
bundles at the central portion of the coaxially-arranged capillary
part for forming a compact structure.
6. The ultra-thin heat pipe structure according to claim 5, wherein
the pipe body of the ultra-thin heat pipe is formed with a bottom
wall and a top wall corresponding to each other and spaced with an
interval, and two lateral edges surrounding the outer periphery of
the top and the bottom wall, the above-mentioned vapor flow channel
is defined by the top and the bottom wall and the two lateral
edges.
7. The ultra-thin heat pipe structure according to claim 6, wherein
the coaxial capillary structure is disposed at the center of the
vapor flow channel and only in contact with a partial portion of
the top and the bottom wall.
8. The ultra-thin heat pipe structure according to claim 6, wherein
the coaxial capillary structure is disposed at an inner side of the
vapor flow channel and in contact with an inner wall of any of the
lateral edges.
9. The ultra-thin heat pipe structure according to claim 8,
furthering including one more coaxial capillary structure, and the
one more coaxial capillary structure is disposed at another inner
side of the vapor flow channel and in contact with an inner wall of
the other lateral edge.
10. The ultra-thin heat pipe structure according to claim 5,
wherein each of the fiber bundles and each of the weaving wires are
made of metal material or non-metal material of glass or carbon
fibers.
11. The ultra-thin heat pipe structure according to claim 10,
wherein the material of which the fiber bundles are made is the
same or different from the material of which the weaving wires are
made.
12. The ultra-thin heat pipe structure according to claim 10,
wherein the outer diameter of the fiber bundles is smaller than the
outer diameter of the weaving wires.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a coaxial capillary
structure, especially to a coaxial capillary structure and an
ultra-thin heat pipe structure having the same.
[0003] 2. Description of Related Art
[0004] The main trend for developing electronic product is to be
thinner, smaller and lighter, so a heat pipe installed therein and
used for dissipating or transferring heat is also required to be
thinner. For example, an ultra-thin heat pipe has a thickness
smaller than 1.5 mm
[0005] However, the thickness of the ultra-thin heat pipe is
thinned, the thickness of a capillary structure installed therein
has to be thinner and narrower or there may not be enough space
inside the heat pipe for forming a vapor flow channel. The
capillary structure installed inside a conventional heat pipe is
formed through grooves, sintering metal powders, fiber bundles, a
metal net or a combination of the above. The capillary structure
allows a working fluid provided in the heat pipe to perform
capillary transferring, but under a situation of the pipe body of
the ultra-thin heat pipe also being required to be thinner, the
capillary transferring effect is not as efficient as a heat pipe
which is not required to be thinned, and various tests have to be
run in a certain space for achieving a balance between the
capillary structure and the vapor flow channel formed inside the
pipe body so as to perform the desired capillary transferring
capability.
[0006] There is another type of capillary structure capable of
providing a better capillary transferring effect. Take a coaxial
capillary structure for example, the coaxial capillary structure is
formed through a plurality of metal wires being reeled on an axle
cable with a weaving manner for forming a strip-like shape, and the
axle cable is removed after the weaving process is finished, so an
interwoven metal wire in a hollow tubular status is obtained and
used for capillary transferring. However, when being installed in
an ultra-thin heat pipe, the above-mentioned hollow tubular
structure has to be processed with a flattening treatment for being
formed as a flat and wide capillary structure so as to be disposed
in the pipe body of the heat pipe. Accordingly, the conventional
coaxial capillary structure is formed through interweaving the
metal wires, and slits formed between the metal wires can provide
the capillary transferring effect, but the hollow tubular structure
formed in the central portion becomes a flat and wide or a loosened
capillary structure after being processed with the flattening
treatment, thus a compact capillary structure is unable to be
formed; if fibers having a smaller diameter are adopted for
weaving, a larger capillary force can be obtained but the tensile
strength provided for sustaining the weaving process is relatively
smaller, so the wire is more likely to be broken during the weaving
process, thereby being harder for production and the quality being
unstable. Therefore, the capillary structure installed in the
ultra-thin heat pipe still has a shortage of not providing a
sufficient capillary transferring effect.
[0007] Accordingly, the applicant of the present invention has
devoted himself for researching and inventing a novel structure for
improving the above-mentioned shortages.
SUMMARY OF THE INVENTION
[0008] The present invention is to provide a coaxial capillary
structure and an ultra-thin heat pipe structure having the same, a
plurality of fiber bundles substantially arranged in parallel or
woven with a non-crossing manner are provided in the coaxial
capillary structure, so the fiber bundles are formed as an integral
bundle and arranged at the center of the coaxial capillary
structure for replacing an axial cable of a conventional coaxial
capillary structure; because the axle cable of the conventional
coaxial capillary structure does not provide the capillary effect
and the capillary structure is formed as a hollow tubular structure
thereby not being able to be compactly arranged, the coaxial
capillary structure of the present invention provides a better
capillary transferring effect and enhance the structural
compactness, and after the coaxial capillary structure of the
present invention is processed with a flattening treatment for
being disposed inside an ultra-thin heat pipe, a better capillary
transferring effect can be provided comparing to the prior art.
[0009] Accordingly, the present invention provides a coaxial
capillary structure, which is installed in an ultra-thin heat pipe
and extended towards the length direction of a pipe body of the
ultra-thin heat pipe. The coaxial capillary structure includes a
primary transferring capillary part and a coaxially-arranged
capillary part interwoven and reeled at the exterior of the primary
transferring capillary part, wherein the primary transferring
capillary part is composed of a plurality of fiber bundles for
forming as an integral bundle, and the coaxially-arranged capillary
part is formed through a plurality of weaving wires interwoven and
reeled at the exterior of the primary transferring capillary part,
thereby limiting each of the fiber bundles at the central portion
of the coaxially-arranged capillary part for forming a compact
structure.
[0010] Accordingly, the present invention provides an ultra-thin
heat pipe structure having a coaxial capillary structure, which
includes an ultra-thin heat pipe and an above-mentioned coaxial
capillary structure, wherein a vapor flow channel is formed inside
a pipe body of the ultra-thin heat pipe for allowing the coaxial
capillary structure to be disposed in the pipe body of the
ultra-thin heat pipe and extended towards the length direction
thereof.
BRIEF DESCRIPTION OF DRAWING
[0011] FIG. 1 is a perspective view showing the coaxial capillary
structure according to the present invention;
[0012] FIG. 2 is a cross sectional view showing the coaxial
capillary structure according to the present invention;
[0013] FIG. 3 is a cross sectional view illustrating the coaxial
capillary structure being installed in a ultra-thin heat pipe
according to one embodiment of the present invention;
[0014] FIG. 4 is a cross sectional view illustrating the coaxial
capillary structure being installed in a ultra-thin heat pipe
according to another embodiment of the present invention; and
[0015] FIG. 5 is a cross sectional view illustrating the coaxial
capillary structure being installed in a ultra-thin heat pipe
according to one another embodiment of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
[0016] Preferred embodiments of the present invention will be
described with reference to the drawings.
[0017] Please refer to FIG. 1 and FIG. 2, wherein FIG. 1 is a
perspective view showing the coaxial capillary structure according
to the present invention; and FIG. 2 is a cross sectional view
showing the coaxial capillary structure according to the present
invention. The present invention provides a coaxial capillary
structure and an ultra-thin heat pipe structure having the same.
The coaxial capillary structure 1 is installed in an ultra-thin
heat pipe 2 (as shown in FIG. 3 or FIG. 4), and extended towards
the length direction of a pipe body of the ultra-thin heat pipe 2.
The coaxial capillary structure 1 includes a primary transferring
capillary part 10 and a coaxially-arranged capillary part 11
enclosing the exterior of the primary transferring capillary part
10.
[0018] The primary transferring capillary part 10 is composed of a
plurality of fiber bundles 100 being substantially arranged in
parallel or woven with a non-crossing manner so as to form an
integral bundle, and the fiber bundles 100 can be made of metal
fibers, or a non-metal material such as glass or carbon fibers as
long as the design of the capillary material structure and the
weaving can achieve a better match. Because each of the fiber
bundles 100 is formed as an integral bundle through being
substantially arranged in parallel or woven with a non-crossing
manner, and the fiber bundles 100 are allowed to be tightly
adjacent to each other for forming a minimum volume, thereby
providing an excellent capillary transferring effect between the
fiber bundles 100.
[0019] The coaxially-arranged capillary part 11 is formed through a
plurality of weaving wires 110 being reeled at the exterior of the
primary transferring capillary part 10 with an interweaving manner,
and the weaving wires 110 can be made of metal wires such as copper
wires, or a non-metal material such as glass or carbon fibers as
long as the design of the capillary material structure and the
weaving can achieve a better match; the material of which the
weaving wire 110 is made can be the same or different from the
material of which the fiber bundle 100 of the primary transferring
capillary part 10 is made. Because of being formed through a
coaxially arranging manner, the coaxially-arranged capillary part
11 is enabled to be reeled at the exterior of the primary
transferring capillary part 10 with an interweaving manner, and the
primary transferring capillary part 10 is able to be limited at the
central portion of the coaxially-arranged capillary part 11 thereby
forming a compact structure, and slits formed between the fiber
bundles 100 of the primary transferring capillary part 10 are able
to be more compact, so an excellent capillary transferring effect
and a better heat transferring effect can be provided between the
fiber bundles 100.
[0020] As shown in FIG. 2, according to this embodiment provided by
the present invention, the outer diameter of each of the fiber
bundles 100 is smaller than the outer diameter of each of the
weaving wires 110, so the outer portion of the coaxial capillary
structure 1 is formed with fibers having a relatively larger
diameter, a better tensile strength is provided during the weaving
process and the situation of wires being broken is less likely to
happen during the weaving process, thereby providing an easier
production and stable quality. It is understood that the outer
diameter of each of the fiber bundles 100 can be the same as the
outer diameter of each of the weaving wires 110, because the fiber
bundles 100 are formed through being substantially arranged in
parallel or woven with a non-crossing manner, under a situation of
the total amounts of the fibers being the same, the provided woven
structure is still formed with a minimum volume and cross sectional
area, thereby occupying the minimum space of a vapor flow channel
and providing the minimum flow resistance; so with the structure
having the fiber bundles 100, the central portion of the coaxial
capillary structure 1 is enabled to be more compact for enhancing
the capillary transferring effect.
[0021] Please refer to FIG. 3, which is a cross sectional view
illustrating the coaxial capillary structure being installed in a
ultra-thin heat pipe according to one embodiment of the present
invention; the pipe body of the ultra-thin heat pipe 2 is processed
with a flattening treatment for obtaining a desired thickness
(mostly smaller than 0.6 mm), and formed with a bottom wall 20 and
a top wall 21 corresponding to each other and spaced with an
interval, and two lateral edges 22 surrounding the outer periphery
of the top and the bottom wall 21, 20, thereby forming a vapor flow
channel 23 defined by the top and the bottom wall 21, 20 and the
two lateral edges 22. The above-mentioned coaxial capillary
structure 1 can also be processed with a flattening treatment for
being able to be disposed at an inner side of the vapor flow
channel 23 and to be in contact with an inner wall of the lateral
edge 22 at any side of the pipe body. Because the outer portion of
the coaxial capillary structure 1 is formed through the
coaxially-arranged capillary part 11, the coaxially-arranged
capillary part 11 is able to be in direct contact with the inner
wall of the pipe body (i.e. any of the lateral edges 22 or a
partial portion of the top and the bottom wall 21, 20), thereby
allowing a liquid-state working fluid condensed at other portion of
the inner wall of the pipe body to be collected in the coaxial
capillary structure 1, and the liquid-state working fluid is
enabled to be guided into the primary transferring capillary part
10, so the slits oriented in a linear status and formed between the
fiber bundles 100 enable the liquid-state working fluid to be
rapidly returned or to be rapidly transferred to a heating portion
(i.e. the vaporization portion) of the ultra-thin heat pipe.
[0022] Please refer to FIG. 4, if the width of the pipe body of the
ultra-thin heat pipe 2 is wide or the amount of working fluid
required to be transferred is large, two inner sides of the vapor
flow channel 23 can both be provided with the above-mentioned
coaxial capillary structure 1 for being respectively in contact
with the inner walls of the two lateral edges 22 of the pipe body.
As such, the vapor flow channel 23 can be formed at a reserved
space between the two coaxial capillary structures 1, and the
liquid-state working fluid is allowed to be collected in any of the
coaxial capillary structures 1 so as to perform the capillary
transferring through the coaxial capillary structure 1.
[0023] Please refer to FIG. 5, the coaxial capillary structure 1
can also be disposed at the center of the vapor flow channel 23 and
be in contact with a partial portion of the top and the bottom wall
21, 20 of the pipe body.
[0024] Accordingly, with the above-mentioned structure, the coaxial
capillary structure and the ultra-thin heat pipe structure having
the same are provided.
[0025] According to the coaxial capillary structure and the
ultra-thin heat pipe structure having the same provided by the
present invention, the fiber bundles 100 are substantially arranged
in parallel or woven with a non-crossing manner, so under a
situation of having the same diameter, the smallest pore and the
greatest capillary force can be provided by the present invention;
and under a situation of having the same amounts of the fibers, the
occupied volume is minimum, so the occupied space of the vapor flow
channel 23 is minimum and a smallest flow resistance is provided.
Thus, the present invention provides a capillary structure capable
of forming a better capillary transferring effect and a better heat
transferring effect in a very small space such as the interior of
the ultra-thin heat pipe.
[0026] Although the present invention has been described with
reference to the foregoing preferred embodiment, it will be
understood that the invention is not limited to the details
thereof. Various equivalent variations and modifications can still
occur to those skilled in this art in view of the teachings of the
present invention. Thus, all such variations and equivalent
modifications are also embraced within the scope of the invention
as defined in the appended claims.
* * * * *