WO2019009515A1

WO2019009515A1 - Heat pipe and device using same

Info

Publication number: WO2019009515A1
Application number: PCT/KR2018/005640
Authority: WO
Inventors: 유준령
Original assignee: (주)카리스가드레일; 유준령
Priority date: 2017-07-03
Filing date: 2018-05-17
Publication date: 2019-01-10
Also published as: KR101826822B1

Abstract

The present invention relates to a thermally conductive heat pipe comprising an outer pipe made of a synthetic resin and an inner pipe formed in close contact with an inner surface of the outer pipe. Specifically, the inner pipe is made of a thermally conductive material containing graphene, and a finishing end of the inner pipe is made of the thermally conductive material to close the end of the heat pipe. A heat pipe according to the present invention can effectively improve a thermal energy transfer characteristic and provide a heating and cooling device having excellent thermal efficiency by appropriately using the heat pipe.

Description

Heat pipe and apparatus using the same

The present invention relates to a heat pipe having efficient heat transfer characteristics and a cooling / heating apparatus using the heat pipe.

In general terms, a heat pipe is a vacuum pipe or a vacuum pipe filled with a volatile liquid such as water or alcohol. When a liquid is heated by one side, the liquid flows into the other side of the pipe and flows to the other side. The liquid is automatically returned to the heating section by the development, and the principle of transferring the heat from the heating section to the heat dissipating section is used by repetition of this action. Heat pipes of this type are heat transfer tubes, and there are various fields of use such as industrial and home-use air conditioners, coolers, and the like.

This heat pipe is usually made of copper, stainless steel, tungsten or the like as the main body of the tube, and porous fiber is used as the inner wall to provide the capillary force. In recent years, there has been a proposal to use synthetic resin in consideration of the productivity and economy of materials. In this case, maintenance or improvement of heat conduction efficiency is the greatest point of view.

As an example thereof, Japanese Patent Application Laid-Open No. 10-1738886 discloses a synthetic pipe for conductive heat exchange containing graphene. 1, the disclosed synthetic resin pipe 1 comprises a plurality of thermally conductive materials 3 formed by containing graphene material in the form of powder solid, known as a thermally conductive material, inside the thickness of the pipe body 2, And a coating layer 4 containing a graphene solution is formed on the surface of the main body 2.

According to the publication of the above patent, a heat conductive property is remarkably improved by inserting a graphen material having excellent thermal conductivity inside and on a surface of a heat exchange pipe made of a synthetic resin. In fact, since Grahene is a material known to have high thermal conductivity, this synthetic resin pipe 1 may be regarded as advantageous in terms of heat conduction compared with a general synthetic resin or a plastic pipe.

In this case, however, the heat energy inside the pipe 1 has already flowed from the beginning into the inner surface and the inner surface of the synthetic resin pipe before reaching the thermally conductive material 3 inside the thickness of the pipe body 2 and the thermally conductive coating layer 4 outside the pipe 1 A considerable amount is lost in the thickness portion. When the thermal conductive material 3 and the coating layer 4 are reached, the thermal energy is already much weakened. Therefore, although the

heat conduction materials

3 and 4 include graphene and are high thermal conductivity materials in themselves, the heat conduction of the pipe 1, as long as it is used as in the structure of the pipe 1, The transfer characteristic is not improved or improved.

That is, in the above conventional technology, although the relatively high-priced thermal conductive material is used, the thermal energy transfer characteristic is not improved or improved, but rather the strength of the heat pipe 1 and the main body 2 is weakened . Therefore, it is practically necessary to efficiently improve the pipe structure to improve the thermal energy transfer characteristic.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art described above. It is an object of the present invention to provide a heat pipe capable of effectively improving thermal energy transfer characteristics through efficient construction and arrangement of a heat conduction material and a cooling and heating device using the same.

The heat pipe of the present invention comprises:

In a heat-conducting heat pipe,

An outer pipe formed of a synthetic resin; and an inner pipe formed in close contact with an inner surface of the outer pipe;

The inner pipe is formed of a thermally conductive material containing a graphene component;

Forming a closed end of the inner pipe with the thermally conductive material to seal the end of the heat pipe;

.

Preferably, the outer pipe is a PE pipe.

Wherein the thermally conductive material is a mixture obtained by mixing graphene powder or 20 to 30% by weight of a solution component with respect to 100 wt% of a synthetic resin. More preferably, the synthetic resin is the same as the synthetic resin of the outer pipe.

Preferably, the finishing end of the inner pipe is protruded from the opening of the outer pipe. More preferably, the end of the heat pipe is provided with a cap for covering the finishing end of the inner pipe.

The apparatus of the present invention comprises:

1. A heat exchange apparatus using the heat pipe as a pipe, comprising:

The heat pipe and the boiler;

The heating portion side of the heat pipe is connected to the heat source of the boiler;

.

As described above, the heat pipe of the present invention includes an outer pipe and an inner pipe closely formed on the inner surface thereof. In particular, the inner pipe is formed of a thermally conductive material containing graphene, and the end of the heat pipe is sealed by forming a finishing end of the inner pipe with a thermally conductive material. In this structure, the strength of internal and external heat pipes is maintained and reinforced, and the internal heat energy is amplified, the rapid conduction, the heating and the heat radiation are brought into direct contact with the entire thermally conductive material including the inside of the pipe and the finishing end . Therefore, it is possible to effectively improve the thermal energy transfer characteristic.

Further, in a preferred embodiment, the finishing end of the inner pipe is protruded from the opening of the outer pipe. This has the effect of further enhancing the thermal energy transfer characteristic described above by exposing the thermally conductive material to possible external pipes. On the other hand, it is possible to provide a cooling / heating apparatus having excellent heat efficiency by using this heat pipe.

1 is a cross-sectional view of a heat pipe according to the prior art,

2 is a perspective view of a heat pipe according to the present invention;

3 is a sectional view of an end portion of a heat pipe according to the present invention.

4 is a configuration diagram of an apparatus using a heat pipe according to the present invention.

[Description of Symbols]

10. Heat pipe

11. External pipe

12. Internal pipe

13. Finishing end

14. Cap

15. Tightening screws

16. Heating section

17. Heat sink

The features and operation effects of the present invention described or not described above will become more apparent from the following description of the embodiments with reference to the accompanying drawings. 2, a heat pipe according to the present invention is denoted by the reference numeral 10, and a device according to the present invention is denoted by reference numeral 20. For reference, the present invention utilizes the well-known heat pipe principle and the characteristics of Graphene.

First of all, as described above, a so-called "heat pipe" is formed by enclosing a volatile liquid such as water or alcohol in a vacuum or a vacuum pipe and sealing it. When one side is heated, the liquid flows into the other side When the heat is released at the end and the liquid becomes a condensed liquid, the liquid automatically returns to the heating part by the capillary phenomenon. The heat conduction pipe is based on the principle that conduction from the heating part to the heat radiating part is repeated.

On the other hand, so-called "graphene" refers to each layer that can be separated in a graphite structure in which carbon atoms are piled up as planes arranged like a honeycomb hexagonal net, and its physical and chemical stability is very high. Specifically, it has electric conductivity more than 100 times higher than that of copper, more than 100 times faster in electron mobility than silicon used for semiconductor, more than 200 times stronger than steel, more than twice thermal conductivity than the highest diamond, It is a material known to be transparent enough to pass most of the light and excellent in stretchability.

2, the heat pipe 10 of the present invention is of course a thermally conductive heat pipe, and includes an outer pipe 11 formed of a synthetic resin, an inner pipe 12 formed in close contact with the inner surface of the outer pipe 11, ). In the present embodiment, the outer pipe 11 is a normal PE plastic pipe, and the inner pipe 12 is formed of a thermally conductive material containing a graphene component.

Preferably, the thermally conductive material is a mixture obtained by mixing graphene powder or 20 to 30% by weight of a solution component with respect to 100 weight% of synthetic resin. The synthetic resin here is made of the same PE resin as that of the synthetic resin of the outer pipe 11, in consideration of bonding property and production economics, by giving the same material to the outer pipe 11. On the other hand, when the graphene powder is mixed with 100 wt% to 150 wt% of the synthetic resin, for example, in an amount exceeding 30 wt% based on 100 wt% of the synthetic resin, molding and strength of the inner pipe 12 are difficult to achieve. %, It becomes difficult to realize a necessary degree of thermal conductivity.

Therefore, the thermally conductive material is a mixture obtained by mixing graphene powder or 20 to 30 wt% of a solution with 100 wt% of synthetic resin. In this case, a small amount of a conventional binder, preferably 5 wt% To 10% by weight. Since the graphene can be melted at a high temperature, it can be melted inside the liquid synthetic resin at a high temperature. Thus, whether graphene is in a powder state or in a solution state does not really benefit from the distinction. On the other hand, there was no significant difference in the properties of the heat pipe 10 within the range of 20 to 30% by weight of the graphene component.

Meanwhile, the outer pipe 11 and the inner pipe 12 may be separately extruded and joined together. However, considering the bonding property and productivity between the elements of the

pipes

11 and 12 made of different materials, the molding by the so-called double extrusion method is more advantageous.

Referring to FIG. 3, the heat pipe 10 of the present invention is formed by forming the finishing end portion 13 of the inner pipe with the thermally conductive material, so that the end portion thereof is sealed. In this way, the end portion of the heat pipe 10 is sealed with the thermally conductive material so that the heat efficiency of the heat pipe 10 can be further improved, for example, heating of the heat pipe 10, It is. Also for the same reason, the finishing end 13 of the inner pipe 12 preferably protrudes from the opening of the outer pipe 11.

In this case, the end of the heat pipe 10 is provided with a cap 14 for covering the finishing end portion 13 of the inner pipe 12. To this end, an end surface of the outer pipe 11 is fastened with a fastening screw (15) are formed. However, the cap 14 is not necessarily provided at both ends of the heat pipe 10, but may be provided at the side of the heat dissipation unit, not the heating unit, for example.

Referring to FIG. 4, the apparatus 20 according to the present invention is a heat exchange apparatus to which the above-described heat pipe 10 is applied as a piping, specifically, a cooling or heating apparatus. The device 20 comprises:

The heat pipe (10) and the boiler (21);

(16) side of the heat pipe is connected to a heat source of the boiler (21);

.

In the present embodiment, the boiler 21 is an electric boiler and the heat source is hot water heated by the electric boiler 21. Naturally, the inner pipe 12 of the heat pipe 10 is filled with water, alcohol, mercury , Acetone, ammonia, freon, or other known evaporative or volatile liquids.

In this state, when the heating portion 16 side of the heat pipe is exposed to the heat source of the boiler 21 and heated, the filling liquid evaporates and moves to the heat radiating portion 17 side with heat energy to radiate heat, And is returned to the heating section 16 side by the capillary force. In this process, efficient heat exchange is performed in the heat pipe 10, and the device can be used for a cooling / heating device, a cooler, or the like.

Claims

In a heat-conducting heat pipe,

An outer pipe (11) formed of a synthetic resin; and an inner pipe (12) formed in close contact with the inner surface of the outer pipe (11);

The inner pipe (12) is formed of a thermally conductive material containing a graphene component, and the end of the heat pipe (10) is closed by forming the finishing end of the inner pipe (12) with the thermally conductive material;

Wherein the thermally conductive material is a mixture obtained by mixing graphene powder or 20 to 30 wt% of a solution component with respect to 100 wt% of a synthetic resin, wherein the inner pipe (12) is obtained by extrusion molding the mixture;

The synthetic resin in the thermally conductive material is the same as the synthetic resin of the outer pipe 11;

.
The method according to claim 1,

Wherein the outer pipe (11) is a PE plastic pipe.
The method according to claim 1,

Wherein a finishing end portion (13) of the inner pipe (12) is protruded from an opening of the outer pipe (11).
The method according to claim 1,

Characterized in that an end of the heat pipe (10) is provided with a cap (14) for covering a finishing end (13) of the inner pipe (12).
1. A heat exchange apparatus using a heat pipe (10) according to any one of claims 1, 2, 3, and 4 as a piping,

The heat pipe (10) and the boiler (21);

(16) side of the heat pipe is connected to a heat source of the boiler (21);

.
6. The method of claim 5,

Characterized in that the boiler (21) is an electric boiler and the heat source is hot water heated by an electric boiler (21).