JP4357872B2 - heat pipe - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat pipe as a heat transfer element, and more particularly to a heat pipe with improved heat exchange efficiency in a normal heat pipe including a wick inside and a loop type thin pipe heat pipe.
[0002]
[Prior art]
[Patent Literature]
In a loop type thin tube heat pipe, the inner wall diameter of the thin tube is set to a diameter equal to or less than the maximum diameter that allows a predetermined working fluid to circulate or move while the tube is always closed. Therefore, the check tube is not required in the narrow tube portion, and the life can be extended.
[0003]
[Problems to be solved by the invention]
The conventional heat pipe has a problem that the heat exchange efficiency between the heat receiving portion and the heat radiating portion depends on the heat conduction of the members constituting the heat pipe, and thus cannot be improved to a predetermined value or more.
[0004]
Therefore, the subject of this invention is obtaining the heat pipe which can further improve heat exchange efficiency, without relying only on the heat conduction of the structural member of a heat pipe.
[0005]
[Means for Solving the Problems]
The means for solving the above-mentioned problem is that a thin tube is provided with a heat receiving portion and a heat radiating portion, and a two-phase condensable working fluid is enclosed in the thin tube , and the thin tube is made of copper with a long sealed shape. Further, a ceramic heat radiation member that converts the heat of the heat source into far infrared rays and radiates it is arranged on the inner periphery of the heat receiving portion of the thin tube and the outer periphery of the heat radiating portion of the thin tube, and the ceramic is made of silicon oxide and aluminum oxide. A liquid material in which a compound and water are mixed is applied and dried to form a laminated film.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The heat radiation member that converts the heat of the heat source into far infrared rays and radiates it is arranged on the inner periphery of the heat receiving part of the thin tube and / or the outer periphery of the heat radiating part of the thin tube, so that the heat of the heat source is the structure of the heat pipe In addition to the heat conduction of the member, the heat radiation member is converted into far infrared rays and is radiated to the inner periphery of the heat receiving part of the thin tube and / or the outer periphery of the heat radiating part of the thin tube, thereby improving the heat exchange efficiency of the heat pipe. be able to.
[0008]
【Example】
In FIG. 1, the heat receiving part 2 and the heat radiating part 3 are arrange | positioned at the both ends of the copper thin tube 1, and the heat | fever arrange | positioned to the outer periphery of the thin tube of the heat receiving part 2 and the thin tube of the heat radiating part 3 is made into a far infrared ray. A heat pipe is composed of the ceramics 4 and 5 serving as heat radiation members that convert and radiate.
[0009]
The thin tube 1 has a long and sealed shape and encloses a working fluid (not shown) that evaporates and condenses inside. A ceramic 4 as a heat radiation member is attached to the entire inner periphery of the thin tube 1 on the heat receiving portion 2 side. On the other hand, a ceramic 5 as a heat radiation member is attached to the entire outer periphery of the thin tube 1 on the side of the heat radiating portion 3.
[0010]
Ceramics 4 and 5 are film-like ones obtained by applying and drying a liquid mixture of a compound of silicon oxide and aluminum oxide and water, and the thickness and mounting area of ceramics 4 and 5 are as follows. It can be appropriately adjusted according to the type of the thin tube 1. Moreover, it is preferable that the thermal conductivity of the ceramics 4 and 5 is a value comparable to or exceeding that of the thin tube 1.
[0011]
As a heat pipe, the heat receiving unit 2 receives heat from the outside, heats and evaporates the working fluid inside the narrow tube 1, and the evaporated vapor moves in the narrow tube 1 to the right and goes to the outside through the heat radiating unit 3. By dissipating heat, the vapor condenses and becomes liquid again, and returns to the heat receiving unit 2.
[0012]
Heat from the outside in the heat receiving section 2 is transmitted through the thin tube 1 member and the ceramic 4 to heat the working fluid inside the thin tube 1 and at the same time, is radiated from the ceramic 4 into the working fluid as far infrared rays. Heating with infrared rays is added to improve heating efficiency.
[0013]
The heat transfer in the heat radiating section 3 is also transmitted through the thin tube 1 member and the ceramic 5 to be transferred to the outside of the heat pipe, and at the same time, is emitted from the ceramic 5 to the outside of the heat pipe as far infrared rays. The heat dissipation is added to improve the cooling efficiency.
[0016]
【The invention's effect】
As described above, in the present invention, a heat radiating member that converts heat into far-infrared rays and radiates it efficiently transfers the heat held by the heat source in the working fluid in the narrow tube and to the outside of the heat pipe. The heat exchange efficiency can be further improved without relying only on the heat conduction of the member.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional configuration diagram of a heat pipe of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Narrow tube 2 Heat receiving part 3 Heat radiation part 4 Inner periphery ceramic 5 Outer periphery ceramic

Claims (1)

The thin tube has a heat receiving portion and a heat radiating portion, and the two-phase condensable working fluid is enclosed in the thin tube. The thin tube is made of copper in a long and sealed shape, and the inner circumference of the heat receiving portion of the thin tube and the thin tube A ceramic heat radiation member that converts the heat of the heat source into far infrared radiation and radiates it on the outer periphery of the heat radiating part, and the ceramic is a liquid in which a compound of silicon oxide and aluminum oxide and water are mixed A heat pipe characterized in that it is made into a film-like one obtained by coating and drying.

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