JPS59221591A - Connector for heat pipe - Google Patents

Abstract

PURPOSE:To prevent the decrease in the heat transfer capacity at a connector by providing the function of a heat pipe for the connector. CONSTITUTION:A connector 1c is formed in a socket shape of a pipe joint in a structure having an annular space that a wick 2c and a vapor passage 4c are disposed in the thickness in double plates. The wick 2c provided therein is formed of mesh or porous material formed of sintered metal, work fluid 3c is sealed in the space, the wick 2c is in a moistened state, and the space is airtightly sealed. The latent heat produced by the condensation of the vapor 7a of a heat pipe 1c is transferred from a heat input unit 5c of a connector 3c through a contacting surface 10, thereby evaporating the fluid 3c. The work fluid vapor 7c produced in the input unit 5c of the connector 3c passes through a vapor passage 4c, is condensed in a heat output unit 6c to dissipate latent heat. This heat is transmitted through the contacting surface 11 to the heat pipe 1b, thereby generating work fluid vapor 7b.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a connector used for long-distance heat transfer using a heat pipe.

[Background of the invention]

Conventional heat pipes are devices that transport heat using capillary action, and the vapor that evaporates in the heating section moves to the cooling section due to the pressure difference, where it condenses.

liquefy. Further, this liquefied fluid moves to the heating section by capillary action and the process is repeated, transferring heat in the form of latent heat. The structure of this heat pipe is shown in FIG.

In the figure, ■ is an RFJ sashimi device, and 2 is a net-like wick with a fine mesh formed thereon, or a porous material made of sintered metal etc. is attached to the inner surface of the temporarily sealed container 1. . A working fluid 3 is inserted into the sealed container 1, and the wick 2 is in a wet state. 4 is a steam passage, 5 is a heat input section, 6 is a heat output section, and 7 is an evaporated gas of the working fluid 3.

Next, the operation will be explained. First, when there is heat input to the heat input section 5, the working fluid 3 in this section absorbs heat and becomes evaporated gas 7. As a result, the working fluid 3 exists in two states in the closely spaced container 1: gas on the heat input section 5 side and liquid on the heat output section 6 side. The pressure on the side of the section 5 increases, and this pressure difference causes the evaporated gas 7 to move through the steam passage 4 to the side of the heat output section 6. Since heat is extracted in the heat output section 6, the evaporated gas 7 is condensed and returned to the wick 2 as a working fluid (liquid) 3.

The working fluid 3 returned into the wick 2 is moved by surface tension due to capillary action and returns to the heat input section again. By repeating this operation, heat can be transferred from the heat input section 5 to the heat output section 6.

The distance of heat transfer using this heat pipe was influenced by the return force of the working fluid 3 due to capillary action, but the magnitude also varied depending on the type of wick 2, the type of working fluid 3, and the combination of the two, and conventional Most of the mass-produced heat pipes have a diameter of 10 mm or less and a length of 1 m or less.

Therefore, in order to transfer heat over long distances using such short heat pipes, it has been considered to use a plurality of short heat pipes connected in series at their end faces, as shown in FIG.

FIG. 2 is a longitudinal cross-sectional view of the case where heat pipes la and lb are connected in a row at the adhesive portion 8. As shown in FIG. In this way, when heat pipes are connected in series, the end portions of the ends act as a wall that slows down heat transfer, causing the heat pipes to lose their ability to function as heat pipes. That is, the end portion of the heat pipe is made of metal, adhesive, and an air layer, and has no effect as a heat pipe.Thermal energy transferred from one heat pipe 1a is transferred to this wall. Because of this, the heat transfer to the other heat pipe 1b depends on the thermal conductivity of the material forming the contact surface, and the inherent high-speed heat transfer ability of the heat pipe is lost in this part.

[Purpose of the invention]

The object of the present invention is to improve a heat pipe connector,
To provide a heat pipe in which the heat transport capacity of a heat pipe connection part is greatly increased.

[Embodiments of the invention]

Hereinafter, the present invention will be explained with reference to the drawings.

FIG. 3 shows an embodiment of the present invention, in which the heat output part and the heat input part of two heat pipes are linearly connected by a connector having the effect of a heat pipe. The carp-lid IC is shaped like a socket of a conventional pipe joint, and has a structure with a double plate in which a wick 2C and a steam passage 4C are arranged within the thickness of the plate. The tube 2C provided inside is either a net-like structure with a fine mesh formed thereon like a conventional heat pipe, or it is made of a porous material made of sintered metal or the like, and can be placed on the entire inner surface of the space. A glaze is provided in one part. Further, the working fluid 3C is inserted into the space, the wick 2C is in a wet state, and the space is kept airtight.

The heat input side dove pipe 1a and the connector IC are in contact with each other at a contact surface 10 or are connected by a bath coat or the like.

The latent heat accompanying the condensation of the working fluid vapor 7a of the heat pipe 1a is transferred from the heat input portion 5C of the connector 30 via the contact surface 1O, causing evaporation of the working fluid 3C. At this time, the heat transfer ability at the contact surface 10 depends on the thermal conductivity of the wall material of the heat nove and the connector, but the size of the contact surface 11 can be changed to compensate for the decrease in heat transfer ability. It is easy to catch.

On the heat output side, the connection between the connector IC and the heat nozzle 1b is the same as on the heat input side. connector 30
The working fluid vapor 7C generated at the heat input section 5C passes through the steam/air passage 4C, condenses at the heat output section 6C, and radiates latent heat.

This heat is transferred to the heat pipe 1b via the contact surface 11, generating working fluid vapor 7b, and heat pipe la,
Heat is transported to Eve 1b through l:υheat. At this time, the reduction in heat transport capacity at the contact portion is adjusted by the size of the contact surface 11, as in the case of the heat input side.

As described above, in the present invention, by providing the connector with the function of a heat pipe, it is possible to prevent a decrease in heat transfer ability at the connection part, which is a problem that rarely occurs with conventional heat pipes.
Enables long-distance heat transfer.

FIG. 4 is an embodiment of an elbow-shaped connector used in a bent portion, and FIG. 5 is a sectional view showing an embodiment of a socket connector of different diameters used in a reduced portion (the same applies to an enlarged portion).

With such a connector, if the socket type is used alone, the heat pipes will be arranged in a straight line, but by using a combination of the elbow type, different diameter sockets, etc. shown in the example, you can have more freedom in laying the heat pipes. There is an advantage that this occurs.

FIG. 6 is a sectional view of a cheese-shaped connector used for merging one branch of heat during heat transport.

The structure and operation of the contact part are the same as those of the socket type, but by changing the size of the contact surface and the pipe diameter, the rate of heat transfer can be changed appropriately depending on the purpose of use.

Figure 7 shows the heat pipe la after removing the inner wall.

An embodiment characterized in that the quick 2g is attached to all or a part of the inner surface of the airtight space formed by the outer wall of the connector 1b and the outer wall of the connector 1g, and at the same time a steam passage 12 is provided through which the vapor of the working fluid 3g passes. show.

The figure shows a case in which a wick 2g is provided on the surface of the heat pipes la and lb. The wick 2g is provided with multiple protrusions high enough to touch the outer wall, and the working fluid 3g is caused by the action of gravity to fill the airtight space. It stagnates at the bottom (not in contact with the quick) and has the effect of not impairing the return force of the working fluid (liquid) obtained by the surface tension caused by capillarity.

FIG. 8 shows an embodiment in which the heat pipe and the connector are connected by contact.

The figure shows an example of a socket type connector, and a heat pipe l.
The outer circumferential surface of the terminal portions a and lb and the inner circumferential surface of the inner wall of the socket connector IC are respectively made into compatible tapered surfaces 15,
Furthermore, heat pipe la.

Install 7 flange 13a, 13b near the terminal of socket connector 1b, and attach flange 1 of the same size to the terminal of socket connector 1c.
4, each flange 13a and 14.13b and 14
By tightening, the contact at the taber surface 15 is improved, the contact thermal resistance is reduced, the heat transport ability in this area is improved, and the workability of assembly, disassembly, etc. is improved. In addition, the flange may have a threaded structure, for example, the contact surface may have a threaded structure.
Alternatively, the tapered surface and the thread h' feature may be used together. Note that 9 indicates the direction of heat flow.

〔Effect of the invention〕

According to the present invention, heat absorption or heat dissipation can be performed with high efficiency, and the heat transfer ability of the heat pipe can be utilized without waste.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a conventional heat pipe, Fig. 2 is a cross-sectional view of a connecting part showing a connection of a conventional heat pipe, and Figs. 3 to 6 show embodiments of the present invention. Cross-sectional views of elbow type, different diameter socket type, and cheese-type connectors; FIG. 7 is a cross-sectional view of another embodiment of the present invention;
The figure shows the connection between the connector of the present invention and the heat pipe.
FIG. 3 is a cross-sectional view showing an example of the case where the wires are mounted. DESCRIPTION OF SYMBOLS 1... Heat pipe, 2... Wick, 3... Working fluid, 8... Contact part, 10.11... Contact part of heat pipe and connector, 12... Steam passage, 13.
14...F th / National 2nd port 3rd country 4th day 5th figure 6th day early 7 National affairs 8 port

Claims (1)

[Claims] 1. A space is provided within the thickness of the wall plate forming the connector, and a wick and a working fluid are put in the space and a prick is inserted to maintain a whistle between the walls. Characteristic carp and lid for heat pipes. 2. The heat pipe connector according to claim 1, wherein the space is a groove provided in the wall plate. 3. For a heat pipe, characterized in that the wick provided in the space is provided with a plurality of protrusions on walls facing each other across the space. connector. 4. A heat pipe connector according to claim 1, characterized in that a contact surface between the connector having a heat pipe buoy geometry and the heat pipe has a tapered structure.