U.S. patent application number 14/568659 was filed with the patent office on 2015-11-19 for heat-dissipation film.
The applicant listed for this patent is BOE TECHNOLOGY GROUP CO., LTD.. Invention is credited to Yuxin BI, Shou LI, Jianing LU.
Application Number | 20150330698 14/568659 |
Document ID | / |
Family ID | 51467567 |
Filed Date | 2015-11-19 |
United States Patent
Application |
20150330698 |
Kind Code |
A1 |
BI; Yuxin ; et al. |
November 19, 2015 |
HEAT-DISSIPATION FILM
Abstract
The invention provides a heat-dissipation film, belonging to the
technical field of heat-dissipation, which can solve the problem
that the heat-dissipation film in the prior art dissipates heat in
a single heat-dissipation way, and the heat-dissipation effect
thereof is not good in the case that much heat or a fire source
exists. The heat-dissipation film of the invention includes a first
heat-dissipation sheet and an endothermic reaction module; wherein
one surface of the first heat-dissipation sheet is in contact with
a heating object, and the other surface of the first
heat-dissipation is attached to the endothermic reaction module for
absorbing heat generated by the heating object. The invention can
improve the heat-dissipation effect of the heat-dissipation
film.
Inventors: |
BI; Yuxin; (Beijing, CN)
; LI; Shou; (Beijing, CN) ; LU; Jianing;
(Beijing, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
BOE TECHNOLOGY GROUP CO., LTD. |
Beijing |
|
CN |
|
|
Family ID: |
51467567 |
Appl. No.: |
14/568659 |
Filed: |
December 12, 2014 |
Current U.S.
Class: |
62/4 ;
165/185 |
Current CPC
Class: |
H05K 7/20481 20130101;
F28F 21/081 20130101; F28F 21/02 20130101; F25D 5/00 20130101 |
International
Class: |
F25D 5/00 20060101
F25D005/00; F28F 21/08 20060101 F28F021/08; F28F 21/02 20060101
F28F021/02 |
Foreign Application Data
Date |
Code |
Application Number |
May 15, 2014 |
CN |
201410205651.4 |
Claims
1. A heat-dissipation film, including a first heat-dissipation
sheet and an endothermic reaction module disposed on the first
heat-dissipation sheet, or including a first heat-dissipation sheet
and a second heat-dissipation sheet which are disposed opposite to
each other with a spacing therebetween, and an endothermic reaction
module disposed between the first heat-dissipation sheet and the
second heat-dissipation sheet, wherein one surface of the first
heat-dissipation sheet is in contact with a heating object, and the
other surface of the first heat-dissipation sheet is attached to
the endothermic reaction module for absorbing heat generated by the
heating object.
2. The heat-dissipation film of claim 1, wherein the first
heat-dissipation sheet is attached to the endothermic reaction
module by thermal conductive adhesive.
3. The heat-dissipation film of claim 1 wherein the endothermic
reaction module includes at least one accommodating chamber which
accommodates endothermic reaction material.
4. The heat-dissipation film of claim 3, wherein the endothermic
reaction material includes a material, endothermic chemical
reaction of which is reversible, and the material includes sodium
bicarbonate or five hydrated copper sulfate.
5. The heat-dissipation film of claim 3, wherein the endothermic
reaction module includes one discharging conduit and one
accommodating chamber, and reactant generated by reaction of the
endothermic reaction material is discharged outside the
heat-dissipation film via the discharging conduit.
6. The heat-dissipation film of claim 3, wherein the endothermic
reaction module includes one discharging conduit, a plurality of
accommodating chambers and a plurality of heat-resistant conduits,
and every two adjacent accommodating chambers communicate with each
other via one heat-resistant conduit, and one of the plurality of
accommodating chambers is connected to the discharging conduit for
discharging reactant generated by reaction of the endothermic
reaction material outside the heat-dissipation film.
7. The heat-dissipation film of claim 6, wherein the heat-resistant
conduit is made of metal.
8. The heat-dissipation film of claim 7, wherein the metal includes
one or more selecting from a group consisting of copper, aluminum,
and silver.
9. The heat-dissipation film of claim 5, wherein the discharging
conduit is made of metal.
10. The heat-dissipation film of claim 9, wherein the metal
includes one or more selecting from a group consisting of copper,
aluminum, and silver.
11. The heat-dissipation film of claim 6, wherein the discharging
conduit is made of metal.
12. The heat-dissipation film of claim 11, wherein the metal
includes one or more selecting from a group consisting of copper,
aluminum, and silver.
13. The heat-dissipation film of claim 3, wherein the first
heat-dissipation sheet and the accommodating chamber are made of
any one selecting from a group consisting of metal, graphite film
and grapheme.
14. The heat-dissipation film of claim 13, wherein the metal
includes one or more selecting from a group consisting of copper,
aluminum, and silver.
15. The heat-dissipation film of claim 1, including a first
heat-dissipation sheet and a second heat-dissipation sheet which
are disposed opposite to each other with a spacing therebetween,
and an endothermic reaction module disposed between the first
heat-dissipation sheet and the second heat-dissipation sheet,
wherein the endothermic reaction module is attached to the second
heat-dissipation sheet by thermal conductive adhesive.
16. The heat-dissipation film of claim 3, including a first
heat-dissipation sheet and a second heat-dissipation sheet winch
are disposed opposite to each other with a spacing therebetween,
and an endothermic reaction module disposed between the first
heat-dissipation sheet and the second heat-dissipation sheet,
wherein the first heat-dissipation sheet, the second
heat-dissipation sheet and the accommodating chamber are made of
any one selecting from a group consisting of metal, graphite film
and graphene.
17. The heat-dissipation film of claim 16, wherein the metal
includes one or more selecting from a group consisting of copper,
aluminum, and silver.
18. The heat-dissipation film of claim 5, wherein the endothermic
reaction material includes a material, endothermic chemical
reaction of which is reversible, and the material includes sodium
bicarbonate or five hydrated copper sulfate.
19. The heat-dissipation film of claim 6, wherein the endothermic
reaction material includes a material, endothermic chemical
reaction of which is reversible, and the material includes sodium
bicarbonate or five hydrated copper sulfate.
Description
FIELD OF THE INVENTION
[0001] The invention relates to the technical field of
heat-dissipation, and particularly to a heat-dissipation film.
BACKGROUND OF THE INVENTION
[0002] In the mechanical, electronic, electric power,
communication, chemical and many other fields, during
manufacturing, processing and using the product, there are many
cases in which high temperature and much heat are generated. As for
some cases, if the generated heat cannot be effectively dissipated
in a certain heat-dissipation way (for example, using a
heat-dissipation film), then it will have adverse effect on the
manufacturing, processing and use of the product, as well as
people's lives and health, and even endanger the people's life
safety.
[0003] At present, the heat-dissipation material widely used in the
heat-dissipation film usually includes metal, such as copper,
aluminum, silver, and metal has good thermal conductivity, which is
approximately between 200.about.500 W/mK. Compared with metal, a
graphite film material and a graphene material manufactured by
using carbon element hake higher heat-dissipation capacities, for
example, the graphite film has a thermal conductivity up to
1500.about.1750 W/mK, and the graphene material has a thermal
conductivity up to 5000 W/mK.
[0004] In order to improve the heat-dissipation effect of the
heat-dissipation film, a method of changing the material of the
heat-dissipation film (such as, the material with good
heat-dissipation capability is used to replace the material with
poor heat-dissipation capacity) or a method of adjusting the
composition of the material of the heat-dissipation film (such as,
an alloy is used to replace metal with a single component) is used
to improve the thermal conductivity, so as to increase the effect
of heat-dissipation.
[0005] The inventor(s) found that there is at least the following
problem existing in the prior art: the heat-dissipation effect of
the heat-dissipation film is generally improved by increasing the
thermal conductivity of the heat-dissipation film. However, such a
heat-dissipation film dissipates heat in a single heat-dissipation
way, and the heat-dissipation effect thereof is not good in the
case that much heat or a fire source exists.
SUMMARY OF THE INVENTION
[0006] The technical problem to be solved by the invention is to
provide a heat-dissipation film which can dissipate heat in a
plurality of ways and can achieve excellent heat-dissipation
effect, so as to overcome the problem that the heat-dissipation
film in the prior art dissipates heat in a single heat-dissipation
way, and the heat-dissipation effect thereof is not good in the
case that much heat or a fire source exists.
[0007] The technical solution employed to solve the technical
problem is a heat-dissipation film, including a first
heat-dissipation sheet and an endothermic reaction module disposed
on the first heat-dissipation sheet, or including a first
heat-dissipation sheet and a second heat-dissipation sheet which
are disposed opposite to each other with a spacing therebetween,
and an endothermic reaction module disposed between the first
heat-dissipation sheet and the second heat-dissipation sheet,
wherein,
[0008] one surface of the first heat-dissipation sheet is in
contact with a heating object, and the other surface of the first
heat-dissipation sheet is attached to the endothermic reaction
module for absorbing heat generated by the heating object.
[0009] In the heat-dissipation film of the invention, since one
surface of the first heat-dissipation sheet is in contact with a
heating object, and the other surface of the first heat-dissipation
sheet is attached to the endothermic reaction module, and the
endothermic reaction module is used to absorb heat generated by the
heating object, thus, when the heat-dissipation film of the
invention is used to dissipate heat, the first heat-dissipation
sheet dissipates heat in a thermal conduction way, and the
endothermic reaction module dissipates heat in thermal absorption
way. Therefore, the heat-dissipation film of the invention
dissipates heat in various ways to achieve a good heat-dissipation
effect, and is particularly suitable to be used in the case that
much heat or a fire source exists.
[0010] Preferably, the first heat-dissipation is attached to the
endothermic reaction module by thermal conductive adhesive.
[0011] Preferably, the endothermic reaction module includes at
least one accommodating chamber which accommodates endothermic
reaction material.
[0012] Further preferably, the endothermic reaction material
includes a material, endothermic chemical reaction of which is
reversible, the material includes sodium bicarbonate or five
hydrated copper sulfate.
[0013] Further preferably, the endothermic reaction module includes
one discharging conduit and one accommodating chamber, and reactant
generated by reaction of the endothermic reaction material is
discharged outside the heat-dissipation film via the discharging
conduit.
[0014] As an alternative, the endothermic reaction module includes
one discharging conduit, a plurality of accommodating chambers and
a plurality of heat-resistant conduits, and every two adjacent
accommodating chambers communicate with each other via one
heat-resistant conduit, and one of the plurality of accommodating
chambers is connected to the discharging conduit fir discharging
reactant generated by reaction of the endothermic reaction material
outside the heat-dissipation film.
[0015] Further preferably, the heat-resistant conduit is made of
metal. The metal may include one or more selecting from a group
consisting of copper, aluminum, and silver.
[0016] Further preferably, wherein the discharging conduit is made
of metal. The metal may include one or more selecting from a group
consisting of copper, aluminum, and silver.
[0017] Further preferably, the first heat-dissipation sheet, the
second heat-dissipation sheet and the accommodating chamber are
made of any one selecting from a group consisting of metal,
graphite film and graphene. The metal may include one or more
selecting from a group consisting of copper, aluminum, and
silver.
BRIEF DESCRIPTION OF THE DRAWINGS
[0018] FIG. 1 is a schematic view of a structure of a
heat-dissipation film provided Embodiment 1 of the present
invention;
[0019] FIG. 2 is a sectional view of the heat-dissipation film
provided by Embodiment 1 of the present invention taken along the
A-A line; and
[0020] FIG. 3 is a schematic view of a structure of a
heat-dissipation film provided by Embodiment 2 of the present
invention;
REFERENCE SIGNS
[0021] 1. first heat-dissipation sheet; 2. second heat-dissipation
sheet; 3. accommodating chamber; 4. heat-resistant conduit; and 5.
discharging conduit.
DETAILED DESCRIPTION OF THE INVENTION
[0022] In order to make persons skilled in the art better
understand the technical solutions of the invention, the invention
will be described in detail it conjunction with the drawings and
the specific embodiments hereinafter. Obviously, the described
embodiments are a part of the embodiments of the invention, and not
all the embodiments. Based on the described embodiments, all the
other embodiments obtained by the person having ordinary skill in
the art without creative effort should belong to the protection
scope of the invention.
Embodiment 1
[0023] The embodiment provides a heat-dissipation film, suitable
for dissipating heat for a product, a component and the like. As
shown in FIGS. 1 and 2, the heat-dissipation film of Embodiment 1
of the invention includes a first heat-dissipation sheet 1 and an
endothermic reaction module, wherein one surface of the first
heat-dissipation sheet 1 is in contact with a heating object, and
the other surface of the first heat-dissipation sheet 1 is attached
to the endothermic reaction module for absorbing heat generated by
the heating object.
[0024] It should be pointed out that, the first heat-dissipation
sheet 1 is generally made of a material with high thermal
conductivity so that it can effectively dissipate heat generated by
the heating object when is in contact with the heating object.
[0025] The heat-dissipation film of the embodiment not only
includes the first beat-dissipation sheet 1, but also includes the
endothermic reaction module disposed on the first heat-dissipation
sheet 1, and the first heat-dissipation sheet 1 and the endothermic
reaction chamber cooperate with each other to effectively dissipate
heat generated by the heating object. In particular, when the
heating object generates a certain amount of heat, since the first
heat-dissipation sheet 1 has high thermal conductivity, it can
transfer heat generated by the heating object to the endothermic
reaction module, and then the endothermic reaction chamber module
absorbs the heat so that heat from the heating object is
dissipated.
[0026] For example, the first heat-dissipation sheet 1 is
preferably connected to the endothermic reaction module by thermal
conducive adhesive, which can not only reliably fix the first
heat-dissipation sheet 1 to the endothermic reaction module, but
also has good thermal conductive capability to transfer heat
generated by the heating object from the first heat-dissipation
sheet 1 to the endothermic reaction module so as to achieve the
object of dissipating heat. Of course, the first heat-dissipation
sheet 1 and the endothermic reaction module may be integrally
formed, that is, the first heat-dissipation sheet 1 and the
endothermic reaction module are formed simultaneously so that they
are completely in contact with each other.
Embodiment 2
[0027] As shown in FIG. 3, the heat-dissipation film of Embodiment
2 of the invention includes a first heat-dissipation sheet 1, a
second heat-dissipation sheet 2 and an endothermic reaction module,
wherein the first heat-dissipation sheet 1 and the second
heat-dissipation sheet 2 are disposed opposite to each other with a
spacing therbetween; the endothermic reaction module is disposed
between the first heat-dissipation sheet 1 and the second
heat-dissipation sheet 2, and is attached to the second
heat-dissipation sheet 2 by thermal conductive adhesive. Since the
endothermic reaction module is disposed between the first
heat-dissipation sheet 1 and the second heat-dissipation sheet 2,
after a part of heat generated by the heating object is absorbed by
the endothermic reaction module, the remaining heat may be further
dissipated by the second heat-dissipation sheet 2. The
heat-dissipation film with such configuration can further improve
the heat-dissipation effect.
[0028] In the embodiment, the first heat-dissipation sheet 1 and
the second heat-dissipation sheet 2 may be made of material with
high thermal conductivity. For example, the first heat-dissipation
sheet 1 and the second heat-dissipation sheet 2 may be preferably
made of graphite film or graphene material with excellent thermal
conductive capability, or may be preferably made of metal such as
copper, aluminum, and silver. For example, the first
heat-dissipation sheet 1 may be bonded to the second
heat-dissipation sheet 2 by high-temperature resistant thermal
conductive adhesive, or the first heat-dissipation sheet 1 may be
hot-pressed onto the second heat-dissipation sheet 2, so as to form
an integratedly structured heat-dissipation film.
[0029] The endothermic reaction module of the heat-dissipation film
in the embodiment includes at least one accommodating chamber 3
which accommodates endothermic reaction material. The endothermic
reaction material includes a material, endothermic chemical
reaction of which is reversible, and the material includes sodium
bicarbonate or five hydrated copper sulfate.
[0030] In particular, when the endothermic reaction material is
sodium bicarbonate (NaHCO.sub.3), a following reaction will occur
when sodium bicarbonate is heated:
2NaHCO.sub.3.fwdarw.Na.sub.2CO.sub.3+H.sub.2O+CO.sub.2, the
reaction generates water and carbon dioxide gas while absorbing
heat, and the reactants (water and carbon dioxide gas) also have
the effects of absorbing heat or eliminating the fire source on the
heat or the fire source generating heat, so the heat-dissipation
effect of the heat-dissipation film is improved. Accordingly,
further preferably, an opening (not shown in the drawings) is
further provided on a side surface of the accommodating chamber 3
to discharge the reactants generated by the reaction of the
endothermic reaction material, so as to further improve the
heat-dissipation effect.
[0031] The endothermic reaction material accommodated inside the
accommodating chamber 3 may be five hydrated copper sulfate
(CuSO.sub.4.5H.sub.2O). A following reaction will occur when five
hydrated copper sulfate is heated:
CuSO.sub.4.5H.sub.2O.dbd.CuSO.sub.4+5H.sub.20, the reaction
generates water while absorbing heat, and the reactant (water) also
has the effects of absorbing heat or eliminating the tire source on
the heat or the tire source generating heat, so the
heat-dissipation effect of the heat-dissipation film is improved;
the other reactant CuSO.sub.4 can absorb water at room temperatures
to generate five hydrated copper sulfate, so that the
heat-dissipation film may be reused, improving practicability of
the heat-dissipation film.
[0032] It should be pointed out that, the embodiment is described
taking sodium bicarbonate and five hydrated copper sulfate as
examples. However, the material, endothermic chemical reaction of
which is reversible, is not limited to the two materials, and any
other material, endothermic chemical reaction of which is
reversible, is also feasible, and the description thereof will be
omitted.
[0033] As an instance of the embodiment, the endothermic reaction
module includes a discharging conduit 5. One accommodating chamber
3 included in the endothermic reaction module is connected to the
discharging conduit 5 for discharging reactant generated by the
reaction of the endothermic reaction material outside the
heat-dissipation film. It should be understood that, with the above
chemical reaction, reactants generated by the reaction of the
endothermic reaction material include water (liquid) and gas, and
the water (liquid) and gas will have a certain influence on the
heat-dissipation film itself, and can be discharged outside the
heat-dissipation film by the discharging conduit 5 to avoid the
influence of the reactants on the performance of the
heat-dissipation film itself.
[0034] As another instance of the embodiment, the number of the
accommodating chambers 3 may be set according to a size of the
required heat-dissipation film (the heat-dissipation film shown in
FIG. 2 includes four accommodating chambers). When the
heat-dissipation film has a large size, the endothermic reaction
module includes a plurality of accommodating chambers 3, in which
case every two adjacent accommodating chambers 3 communicate with
each other via a heat resistant conduit 4, and one of the plurality
of accommodating chambers 3 is also connected to the discharging
conduit 5 for discharging reactants generated by the reaction of
the endothermic reaction material outside the heat-dissipation
film. The heat-dissipation film with such a configuration
dissipates heat in the same way as that with accommodating chamber
3, and just for simplifying structure, all the accommodating
chambers 3 communicate with each other via the heat resistant
conduits 4, reactants generated by the chemical reaction in all the
accommodating chamber 3 are collected together via the heat
resistant conduits 4 for communicating all the accommodating
chambers 3, and all the reactants generated by the chemical
reaction of the endothermic reaction material are then discharged
outside the heat-dissipation film via one discharging conduit
5.
[0035] Further preferably, all the heat resistant conduits 4 and
the discharging conduit 5 are made of metal such as copper,
aluminum and silver. All the heat resistant conduits 4 and the
discharging conduit 5 are welded to or chemically bonded to the
accommodating chamber 3.
[0036] It should be pointed out that, the accommodating chamber $
may be in the shape of a cuboid, an ellipsoid and the like, and in
the embodiment the shape of the accommodating chamber 3 is not
specially limited. The accommodating chamber 3 may be made of a
material with high thermal conductivity, and may preferably be made
of any one of metal, graphite film and graphene. in order to make
the production process simple and reduce the production cost, the
accommodating chamber 3 is preferably made of any one or more
selected from copper, aluminum, and silver, and further preferably,
the accommodating chamber 3 is made of copper.
[0037] When the heat-dissipation film of other size is needed, a
plurality of pieces of heat-dissipation film can be jointed
together, that is, an edge of one piece of heat-dissipation film is
hot-pressed onto an edge of its adjacent heat-dissipation film so
as to connect the two pieces of heat-dissipation film together.
Thus, the heat-dissipation film of other size can be obtained.
[0038] The heat-dissipation film of the invention includes the
first heat-dissipation sheet 1 and the endothermic reaction module
disposed on the first heat-dissipation sheet 1, or includes the
first heat-dissipation sheet 1 and a second heat-dissipation sheet
2 which are disposed opposite to each other with the endothermic
reaction module therebetween. Thus, when the heat-dissipation film
of the invention is used to dissipate heat, the first
heat-dissipation sheet 1 or the first and second heat-dissipation
sheets 1 and 2 dissipate heat by conducting heat, and at the same
time the endothermic reaction module also functions to dissipate
heat by absorbing heat to make a reaction occur. Thus, the
heat-dissipation film of the invention dissipates heat in various
ways to achieve a better heat-dissipation effect, and is
particularly suitable for the case in which much heat or a fire
source exists.
[0039] It should be understood that, the above embodiments are
described only to illustrate the principle of the invention, and
the invention is not limited thereto. Persons skilled in the art
can make various modifications and improvements without departing
from the principle and substance of the invention, and these
modifications and improvements should be considered to be within
the protection scope of the invention.
* * * * *