U.S. patent application number 14/185008 was filed with the patent office on 2015-07-16 for heat pipe structure having strip-shaped capillary tissue at both side ends thereof.
The applicant listed for this patent is Hao PAI. Invention is credited to Hao PAI.
Application Number | 20150198379 14/185008 |
Document ID | / |
Family ID | 53521070 |
Filed Date | 2015-07-16 |
United States Patent
Application |
20150198379 |
Kind Code |
A1 |
PAI; Hao |
July 16, 2015 |
HEAT PIPE STRUCTURE HAVING STRIP-SHAPED CAPILLARY TISSUE AT BOTH
SIDE ENDS THEREOF
Abstract
A heat pipe structure includes a pipe shell (1) and a capillary
tissue (2) disposed in the pipe shell (1). A pipe body (10) has a
hollow vapor channel (100) along a longitudinal direction thereof
and sealing a working fluid. The capillary tissue (2) has two
strip-shaped primary capillary portions (20, 21) passing through
the vapor channel (100) and a connecting capillary portion (22)
connecting the two primary capillary portions (20, 21). The two
primary capillary portions (20, 21) extend along a longitudinal
direction of the pipe shell (1) and are immediately adjacent to
respective side walls (103) of the pipe body (10) along the
longitudinal direction thereof. The connecting capillary portion
(22) is disposed against the inside of one end (11) of the pipe
shell (1) to connect the two primary capillary portions (20, 21)
for mutual transmission of the working fluid.
Inventors: |
PAI; Hao; (Taoyuan County,
TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
PAI; Hao |
Taoyuan County |
|
TW |
|
|
Family ID: |
53521070 |
Appl. No.: |
14/185008 |
Filed: |
February 20, 2014 |
Current U.S.
Class: |
165/104.26 |
Current CPC
Class: |
F28D 15/046 20130101;
F28D 15/0233 20130101 |
International
Class: |
F28D 15/04 20060101
F28D015/04 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 14, 2014 |
TW |
103101337 |
Claims
1. A heat pipe structure, comprising: a pipe shell (1) comprising a
pipe body (10) and two end portions (11, 11') sealing two ends of
the pipe shell (1), wherein the pipe body (10) has a hollow vapor
channel (100) along a longitudinal direction thereof and sealing a
working fluid; and a capillary tissue (2) disposed in the pipe
shell (1) and having two strip-shaped primary capillary portions
(20, 21) passing through the vapor channel (100) and a connecting
capillary portion (22) connecting the two primary capillary
portions (20, 21) to continuously form a long strip portion,
wherein the two primary capillary portions (20, 21) extend along a
longitudinal direction of the pipe shell (1) and are immediately
adjacent to respective side walls (103) of the pipe body (10) along
a longitudinal direction thereof, wherein the connecting capillary
portion (22) is disposed against the inside of an end portion (11)
of the pipe shell (1) to connect the two primary capillary portions
(20, 21) for mutual transmission of the working fluid.
2. The heat pipe structure according to claim 1, wherein the pipe
shell (1) has a flat cross-section.
3. The heat pipe structure according to claim 1, wherein the pipe
shell (1) has an outer thickness below 0.6 mm.
4. The heat pipe structure according to claim 1, wherein the
capillary tissue (2) is woven from sintered powder, fiber, or metal
wires, or is a continuous long strip formed by twisting a metal
net.
5. The heat pipe structure according to claim 1, wherein the
connecting capillary portion (22) of the capillary tissue (2) is
between the two primary capillary portions (20, 21) and bent into a
straight shape or an arc shape and disposed in the pipe shell (1)
along a transverse direction thereof.
6. The heat pipe structure according to claim 1, wherein the two
primary capillary portions (20, 21) of the capillary tissue (2)
extend toward the other end portion (11') and further extend toward
each other to form respective secondary capillary portions (200,
210).
7. The heat pipe structure according to claim 6, wherein each of
the secondary capillary portions (200, 210) has an arc shape.
8. The heat pipe structure according to claim 6, wherein the
secondary capillary portions (200, 210) extend toward each other
and further extend along the longitudinal direction of the pipe
shell (1) to form respective rear segments (201, 211).
9. The heat pipe structure according to claim 8, wherein the rear
segments (201, 211) are spaced to each other or disposed in contact
with each other and in parallel.
10. The heat pipe structure according to claim 9, wherein the rear
segments (201, 211) has identical or different lengths.
11. The heat pipe structure according to claim 8, wherein the rear
segments (201, 211) extend from the respective secondary capillary
portions (200, 210) toward the longitudinal direction of the pipe
shell (1) and are disposed first in contact with each other and
then spaced.
12. The heat pipe structure according to claim 1, wherein one of
the two primary capillary portions (20, 21) of the capillary tissue
(2) extends toward the other end portion (11') of the pipe shell
(1), wherein the other end portion (11') extends to form a
secondary capillary portion (200), from which a rear segment (201)
extends.
13. The heat pipe structure according to claim 12, wherein the rear
segment (201) contacts with the other one of the two primary
capillary portions (20, 21).
14. The heat pipe structure according to claim 12, wherein the rear
segment (201) extends along the longitudinal direction of the pipe
shell (1) and is spaced from the other one of the two primary
capillary portions (20, 21).
15. The heat pipe structure according to claim 14, wherein the
other one of the two primary capillary portions (20, 21) extends
toward the other end portion (11') and further extends to form
another secondary capillary portion (210) to contact with the rear
segment (201).
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a capillary tissue and, in
particular, to a heat pipe structure having a strip-shaped
capillary tissue at both side ends.
[0003] 2. Description of Related Art
[0004] The traditional capillary tissues in a heat pipe, such as
those made from fiber, woven metal wires or twisted metal nets,
present curved shapes without specific directions due to the
natures of elastic restoring forces after they are woven or
twisted. Consequently, it is difficult to place them into the heat
pipe or it cannot be ensured that they have been properly
positioned and shaped in the heat pipe.
[0005] In particular, in the case of a strip-shaped capillary
tissue (e.g., a coaxially braided capillary tissue), the long strip
shape makes it difficult to remain straight in the heat pipe; also,
the space reserved for the vapor channel is necessary to be
considered. As a result, the capillary tissue is usually disposed
on the edge of one side of the heat pipe, resulting in a reduced
evaporation surface and thus a lower heat transfer property. If a
strip-shaped capillary tissue is disposed on each of both sides of
the heat pipe, the heat transfer cannot take place due to long
separation between the two strip-shaped capillary tissues,
affecting the flow-back efficiency of the liquid working fluid.
[0006] In view of this, the inventor pays special attention to
research with the application of related theory and tries to
overcome the above disadvantages regarding the above related art.
Finally, the inventor proposes the invention which is a reasonable
design and overcomes the above disadvantages.
SUMMARY OF THE INVENTION
[0007] The present invention is to provide a heat pipe structure
having a strip-shaped capillary tissue at both side ends thereof.
By means of special shapes, the heat pipe of the present invention
not only enables the capillary tissue to be positioned and shaped
after it is placed into the heat pipe, but also enables two-way
transmission of the liquid working fluid without affecting the
space reserved for the vapor channel.
[0008] The present invention provides a heat pipe structure
comprising a pipe shell and a capillary tissue disposed in the pipe
shell. The pipe shell comprise a pipe body and two end portions
sealing two ends of the pipe shell. The pipe body has a hollow
vapor channel along a longitudinal direction of the pipe body and
sealing a working fluid. The capillary tissue has two strip-shaped
primary capillary portions passing through the vapor channel and a
connecting capillary portion connecting the two primary capillary
portions to continuously form a long strip portion. The two primary
capillary portions extend along a longitudinal direction of the
pipe shell and are immediately adjacent to respective side walls of
the pipe body along the longitudinal direction thereof; the
connecting capillary portion is disposed against the inside of one
end of the pipe shell to connect the two primary capillary portions
for mutual transmission of the working fluid.
BRIEF DESCRIPTION OF DRAWING
[0009] FIG. 1 is a perspective exploded schematic view of the heat
pipe structure according to the first embodiment of the present
invention;
[0010] FIG. 2 is a perspective assembled schematic view of the heat
pipe structure according to the first embodiment of the present
invention;
[0011] FIG. 3 is a cross-sectional view of the heat pipe structure
according to the first embodiment of the present invention;
[0012] FIG. 4 is a planar cross-sectional view of the interior of
the heat pipe structure according to the first embodiment of the
present invention;
[0013] FIG. 5 is a planar cross-sectional view of the interior of
the heat pipe structure according to the second embodiment of the
present invention
[0014] FIG. 6 is a planar cross-sectional view of the interior of
the heat pipe structure according to the third embodiment of the
present invention;
[0015] FIG. 7 is a planar cross-sectional view of the interior of
the heat pipe structure according to the fourth embodiment of the
present invention;
[0016] FIG. 8 is a planar cross-sectional view of the interior of
the heat pipe structure according to the fifth embodiment of the
present invention;
[0017] FIG. 9 is a planar cross-sectional view of the interior of
the heat pipe structure according to the sixth embodiment of the
present invention;
[0018] FIG. 10 is a planar cross-sectional view of the interior of
the heat pipe structure according to the seventh embodiment of the
present invention; and
[0019] FIG. 11 is a planar cross-sectional view of the interior of
the heat pipe structure according to the eighth embodiment of the
present invention.
DETAILED DESCRIPTION OF THE INVENTION
[0020] To let the examiners further understand the features and
technical details of the present invention, the detailed
description and accompanying figures are provided below for
reference. However, the accompanying figures are only for reference
and explanation, but not to limit the scope of the present
invention.
[0021] Please refer to FIGS. 1-3, which are a perspective exploded
schematic view, a perspective assembled schematic view, and a
cross-sectional view of the heat pipe structure according to the
first embodiment of the present invention, respectively. The
present invention provides a heat pipe structure comprising a pipe
shell 1 and a capillary tissue 2 disposed in the pipe shell 1.
[0022] The pipe shell 1 is basically a long tube body having a flat
cross-section and seals a working fluid (not shown). In the current
embodiment, the flat cross-section is formed by a pressing process,
which is applicable to the ultrathin heat pipe having an outer
thickness below 0.6 mm, for example. As shown in FIG. 1, before the
pipe shell 1 is sealed, it comprises a pipe body 10 and an end
portion 11 sealing one end of the pipe body 10. The pipe body 10
has a hollow vapor channel 100 along a longitudinal direction of
the pipe shell 1, as shown in FIG. 3, and the vapor channel 100
communicates with the other end of the pipe body 10 to have an
opening through which the capillary tissue 2 is placed into the
vapor channel 100. After the capillary tissue 2 is placed into the
pipe shell 1 and the degassing is completed, the other end of the
pipe body 10 is sealed to form another end portion 11' on which a
seal structure 12 is formed.
[0023] The capillary tissue 2 is woven from sintered powder, fiber,
or metal wires, or the capillary tissue 2 is a continuous long
strip formed by twisting a metal net; the capillary tissue 2 is
disposed in the pipe shell 1. As shown in FIGS. 3 and 4, the pipe
body 10 of the pipe shell 1 further comprises a bottom wall 101, a
top wall 102, and two side walls 103 which are two portions
disposed between the bottom wall 101 and the top wall 102. That is,
the vapor channel 100 is surrounded and formed by the bottom wall
101, the top wall 102, and the two side walls 103. The capillary
tissue 2 has two strip-shaped primary capillary portions 20, 21
passing through the vapor channel 100 and a connecting capillary
portion 22 connecting the two primary capillary portions 20, 21 to
continuously form a long strip portion. The two primary capillary
portions 20, 21 extend along a longitudinal direction of the pipe
shell 1 and are immediately adjacent to respective side walls 103
of the pipe body 10. The connecting capillary portion 22 is
disposed against the inside of an end portion 11 of the pipe shell
1 to connect the two primary capillary portions 20, 21 for mutual
transmission of the working fluid. In the first embodiment, the
connecting capillary portion 22 is between the two primary
capillary portions 20, 21 and bent into a straight shape and
disposed in the pipe shell 1 along a transverse direction thereof.
Therefore, by means of the above-mentioned structure, the heat pipe
structure having a strip-shaped capillary tissue at both side ends
thereof can be obtained.
[0024] Based on the above, please further refer to FIG. 4. Because
the capillary tissue 2 is formed by bending and disposing along the
inside of the pipe shell 1 (i.e., the two side walls 103 and the
end portion 11), it is easier to be positioned in the pipe shell 1.
Also, the mutual transmission of the liquid working fluid between
the two primary capillary portions 20, 21 is enabled via the
connection of the connecting capillary portion 22. The space
between the two primary capillary portions 20, 21 for the vapor
channel 100 is maintained as well, which avoids the blockage of
gaseous working fluid and a reduced heat transfer.
[0025] As shown in FIG. 5, which is the second embodiment of the
present invention, the connecting capillary portion 22 may have an
arc shape; the two primary capillary portions 20, 21 extend toward
the other end portion 11' of the pipe shell 1 and further extend
toward each other to form respective secondary capillary portions
200, 210, each of which having an arc shape.
[0026] Further, as shown in FIGS. 6, 7, and 8, which are the third,
fourth, and fifth embodiments of the present invention,
respectively, the two secondary capillary portions 200, 210 of the
two primary capillary portions 20, 21 extend toward each other and
further extend along the longitudinal direction of the pipe shell 1
to form respective rear segments 201, 211. As shown in FIG. 6, the
two rear segments 201, 211 may be spaced to each other; as shown in
FIG. 7, they may be disposed in contact with each other and in
parallel. The two rear segments 201, 211 may be disposed with
identical or different lengths according to the inner space of the
pipe shell 1. As shown in FIG. 8, the two rear segments 201, 211
have the identical lengths and extend from the respective secondary
capillary portions 200, 210 toward the longitudinal direction of
the pipe shell 1 and are disposed first in contact with each other
and then spaced.
[0027] In addition, FIG. 9 shows the sixth embodiment of the
present invention. Only one of the two primary capillary portions
20, 21 (for example, the primary capillary portion 20 in FIG. 9)
can extend to form the secondary capillary portion 200 having an
arc shape from which the rear segment 201 extends to contact with
the other primary capillary portion 21.
[0028] Also, FIGS. 10 and 11 are the seventh and eighth embodiments
of the present invention, respectively. The rear segment 201 of the
primary capillary portion 20 can extend directly toward the
longitudinal direction of the pipe shell 1 and is spaced from the
other primary capillary portion 21, instead contacts with the other
primary capillary portion 21, as shown in FIG. 10. Alternatively,
as shown in FIG. 11, the other primary capillary portion 21 can
extend toward the other end portion 11' and then extend to form the
secondary capillary portion 210 to contact with the rear segment
201.
[0029] Therefore, by means of the heat pipe structure having a
strip-shaped capillary tissue at both side ends of the present
invention, the capillary tissue 2 is easier to be positioned in the
pipe shell 1 because the capillary tissue 2 is formed by bending
and disposing along the inside of the pipe shell 1 (i.e., the two
side walls 103 and the end portion 11). Moreover, the mutual
transmission of the liquid working fluid between the two primary
capillary portions 20, 21 is enabled via the connection of the
connecting capillary portion 22. The space between the two primary
capillary portions 20, 21 for the vapor channel 100 is maintained
as well, which avoids the blockage of gaseous working fluid and a
reduced heat transfer.
[0030] In summary, the present invention can achieve the expected
objective and overcome the disadvantages of the prior art. also it
is indeed novel, useful, and non-obvious to be patentable. Please
examine the application carefully and grant it as a formal patent
for protecting the rights of the inventor.
[0031] The embodiments described above are only preferred ones of
the present invention and not to limit the claimed scope of the
present invention. Therefore, all the equivalent modifications and
variations applying the spirit of the present invention should be
embraced by the claimed scope of the present invention.
* * * * *