U.S. patent application number 11/855040 was filed with the patent office on 2009-03-19 for heat pipe structure.
This patent application is currently assigned to FORCECON TECHNOLOGY Co., Ltd.. Invention is credited to Jhong-Yan Chang, Sin-Wei HE.
Application Number | 20090071633 11/855040 |
Document ID | / |
Family ID | 40453225 |
Filed Date | 2009-03-19 |
United States Patent
Application |
20090071633 |
Kind Code |
A1 |
HE; Sin-Wei ; et
al. |
March 19, 2009 |
HEAT PIPE STRUCTURE
Abstract
The heat pipe structure includes a pipe body, hollow groove and
capillary tissue. The pipe body contains a heat-conducting end and
a radiating end. The capillary tissue of a predefined thickness is
adapted to an inner wall of the pipe body. The inner surface of
capillary tissue is located correspondingly to the section of the
heat-conducting end, where a portion with greater thickness is
shaped from another section of the capillary tissue. The portion is
of single side, a plurality of sides or annular structure. Thus,
the heat conduction efficiency of the heat-conducting end greatly
improves. The non heat-conducting sections of the capillary tissue
remain still with respect to thickness, and the guide space expands
to facilitate guiding of gaseous working fluid to the radiating
end, thus achieving an optimum heat radiation effect.
Inventors: |
HE; Sin-Wei; (Jhudong
Township, TW) ; Chang; Jhong-Yan; (Chu Pei City,
TW) |
Correspondence
Address: |
EGBERT LAW OFFICES
412 MAIN STREET, 7TH FLOOR
HOUSTON
TX
77002
US
|
Assignee: |
FORCECON TECHNOLOGY Co.,
Ltd.
Chu Pei City
TW
|
Family ID: |
40453225 |
Appl. No.: |
11/855040 |
Filed: |
September 13, 2007 |
Current U.S.
Class: |
165/104.26 |
Current CPC
Class: |
F28D 15/0233 20130101;
F28D 15/046 20130101 |
Class at
Publication: |
165/104.26 |
International
Class: |
F28D 15/00 20060101
F28D015/00 |
Claims
1. A heat pipe structure, comprising: a pipe body, having a
heat-conducting end, a radiating end, an inner wall, and a hollow
groove; and capillary tissue of a predefined thickness, adapted to
said inner wall of said pipe body, said capillary tissue having an
inner surface opposite said pipe body and a portion, with greater
thickness than capillary tissue in other sections of said pipe and
being located correspondingly to said heat-conducting end of said
pipe body.
2. The structure defined in claim 1, wherein said portion with
greater thickness is arranged onto one side of said inner surface
of said capillary tissue.
3. The structure defined in claim 1, wherein said portion with
greater thickness is arranged onto a plurality of sides of said
inner surface of said capillary tissue or in an annular manner.
4. The structure defined in claim 1, wherein said hollow groove of
said pipe body has a mould core inserted therein, forming said
portion with greater thickness by moulding, said mould core being
inserted by an eccentric side thereof.
5. The structure defined in claim 1, wherein said capillary tissue
is arranged annularly onto said inner wall of the pipe body, or
only adapted transversely to said inner wall of said pipe body.
Description
CROSS-REFERENCE TO RELATED U.S. APPLICATIONS
[0001] Not applicable.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
[0002] Not applicable.
NAMES OF PARTIES TO A JOINT RESEARCH AGREEMENT
[0003] Not applicable.
REFERENCE TO AN APPENDIX SUBMITTED ON COMPACT DISC
[0004] Not applicable.
BACKGROUND OF THE INVENTION
[0005] 1. Field of the Invention
[0006] The present invention relates generally to a heat pipe, and
more particularly to an innovative heat pipe with a capillary
structure.
[0007] 2. Description of Related Art Including Information
Disclosed Under 37 CFR 1.97 and 37 CFR 1.98.
[0008] A heat pipe mainly comprises a pipe body, vacuum groove,
capillary tissue and working fluid. According to the operating
principle of the heat pipe, a heat source contacts the
heat-conducting end of the heat pipe, so that the working fluid
evaporates into a gaseous state, and then the working fluid is
guided to the radiating end, where the working fluid is condensed
into a liquid state in such a cold environment. Finally, the
capillary tissue absorbs the working fluid as liquid back to the
heat-conducting end as a cycle.
[0009] The capillary tissue of typical heat pipe is shown in FIG.
1, wherein the inner side 12 of the capillary tissue 11 of the heat
pipe 10 has a flat surface. It is observed from the known
applications that, as the heat-conducting end 13 of the heat pipe
10 is concerned, the heat conduction and vaporization effect of
working fluid will be impaired if the capillary tissue 11 is very
thin due to the flat surface of inner side 12 of the capillary
tissue 11. However, if the capillary tissue 11 becomes thicker, the
remaining space of the heat pipe 10 will be cut down, and the flow
efficiency of gaseous working fluid will be affected, making it
impossible to further improve the heat radiation effect.
[0010] Thus, to overcome the aforementioned problems of the prior
art, it would be an advancement in the art to provide an improved
structure that can significantly improve efficacy.
[0011] Therefore, the inventor has provided the present invention
of practicability after deliberate design and evaluation based on
years of experience in the production, development and design of
related products.
BRIEF SUMMARY OF THE INVENTION
[0012] Based upon an innovation of the present invention that the
capillary tissue has a partially-thick portion, the heat conduction
and vaporization effect of working fluid improves, thus
significantly increasing heat conduction efficiency of the
heat-conducting end of a heat pipe. Since the non-heat-conducting
sections of the inner surface of capillary tissue remain at the
same thickness, the guide space is expanded to facilitate guiding
of gaseous working fluid to the radiating end, thus achieving an
optimum heat radiation effect.
[0013] Although the invention has been explained in relation to its
preferred embodiment, it is to be understood that many other
possible modifications and variations can be made without departing
from the spirit and scope of the invention as hereinafter
claimed.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
[0014] FIG. 1 shows a sectional view of a typical heat pipe
structure.
[0015] FIG. 2 shows a sectional view of a preferred embodiment of
the heat pipe structure of the present invention.
[0016] FIG. 3 shows a sectional view of the molding method of the
staged capillary tissue of the heat pipe of the present
invention.
[0017] FIG. 4 shows another sectional view of the staged capillary
tissue of the heat pipe of the present invention.
[0018] FIG. 5 shows another sectional view of arrangement of
capillary tissue of the heat pipe of the present invention.
[0019] FIG. 6 shows another sectional view of arrangement of
capillary tissue of the heat pipe with a thick portion.
DETAILED DESCRIPTION OF THE INVENTION
[0020] The features and the advantages of the present invention
will be more readily understood upon a thoughtful deliberation of
the following detailed description of a preferred embodiment of the
present invention with reference to the accompanying drawings.
[0021] FIGS. 1-3 depict preferred embodiments of the present
invention. The embodiments are provided only for explanatory
purposes. The scope of the invention is set by the patent
claims.
[0022] The heat pipe A includes a pipe body 20, hollow groove 23,
and capillary tissue 30 within the pipe body 20. The pipe body 20
contains a heat-conducting end 21 and a radiating end 22, while the
capillary tissue 30 of predefined thickness is adapted annularly to
the inner wall of pipe body 20, e.g. sintered from metal grains.
For the inner surface 31 of said capillary tissue 30 corresponding
to the heat-conducting end 21 of the pipe body 20, a portion 32 of
the capillary tissue 30 has a thickness greater than said capillary
tissue 30 in other sections of the pipe body 20.
[0023] Referring to FIG. 2, said portion 32 with greater thickness
is arranged onto one side of the inner surface 31 of the capillary
tissue 30.
[0024] Referring to FIG. 4, a portion 32B with greater thickness is
arranged onto a plurality of sides of the inner surface 31 of
capillary tissue 30 or in an annular manner.
[0025] FIG. 3 depicts the molding method of portion 32 of the inner
surface 31 of the capillary tissue 30. A mould core 40 with an
eccentric side 41 is inserted into the hollow groove 23 of the pipe
body 20 as a fixture. After the capillary tissue 30 is adapted to
the inner wall of the pipe body 20 and then shaped, the mould core
40 is pulled out, thus forming said portion 32 with greater
thickness through the eccentric side 41 of the mould core 40.
[0026] Based upon above-specified structures that the heat pipe A
of the present invention allows shaping of a portion 32 with
greater thickness through the inner surface 31 of the capillary
tissue 30, the portion 32 with greater thickness increases the
thickness of capillary tissue 30, thus enlarging the volume of
capillary tissue 30 and improving the heat-absorbing and conduction
for higher vaporization efficiency of working fluid. Since the
portion 32 with greater thickness is located correspondingly to the
heat-conducting end 21 of the pipe body 20, the heat-conducting end
21 contacts the predefined heat source (e.g. a CPU of a computer),
thus helping to improve the overall heat-radiation efficiency of
heat pipe.
[0027] Referring to FIG. 5, said capillary tissue 30 is also
adapted transversely to an inner wall of the pipe body 20 (e.g. the
capillary tissue is only arranged at bottom of the inner wall of
pipe body), whilst the portion 32 with greater thickness of the
preferred embodiment is composed of a staged section of the
capillary tissue 30.
[0028] Referring also to FIG. 6, the capillary tissue 30 is also
adapted transversely to an inner wall of the pipe body 20. The
difference with FIG. 5 is that the portion 32 with greater
thickness is composed of capillary tissue 30 with greater thickness
marked at 32 compared to thickness at 31, wherein 31 is now located
at the end of the pipe body.
* * * * *