JPH04122956U - heat pipe - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to facilitate the embedding of a heat pipe having two or more heat pipes in the same extrusion cross section into a honeycomb sandwich panel. [Structure] Consists of a groove wick, a working fluid sealed in a pipe, and an envelope containing the groove wick and the working fluid.
It consists of two or more heat pipes and a gap between adjacent heat pipes within the same extrusion cross section. [Effect] By using the gap between the heat pipes to penetrate the fastening material and holding the two heat pipe envelopes with the thermosetting film adhesive sandwiched between them,
In this state, it can be embedded into a honeycomb sandwich panel, and the conventional bonding process before molding can be omitted. Additionally, the weight of the heat pipe can be significantly reduced.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is an extremely efficient heat transfer medium that utilizes the latent heat of the liquid. Space heat plays an important role in artificial satellites that have large weight constraints It concerns improvements to pipes.

0002

[Conventional technology]

FIG. 3 is a diagram showing a cross section of a conventional heat pipe. In the figure, 1 is a heat pie 2a and 2b are tube walls, 3a and 3b are groove wicks cut in the longitudinal direction. H, 4a, 4b are actuators with large latent heat, such as ammonia, sealed in the tube. It is a fluid.

0003 A conventional heat pipe is constructed as described above, and one end of the heat pipe is heated. Then, the working fluid 4 repeats the cycle of evaporation and condensation within the tube, efficiently transporting heat.

0004 Figure 4 shows a conventional heat pipe embedded in an aluminum honeycomb sandwich panel. FIG. Aluminum honeycomb sandwich panels are lightweight Moreover, it is widely used as the structure of artificial satellites due to its excellent strength and rigidity. Although it is a material, its heat transfer coefficient is extremely low both in the surface direction and in the thickness direction, making it difficult to use in high-heating electronic devices. When used as the structure of an on-board satellite, a heat pipe is embedded. This is common. The two envelopes 1a and 1b are pasted together in advance. It is bonded with an adhesive 5, and after being arranged with the honeycomb core 6, it is thermally cured. It is sandwiched between two skins 8 via a film-like adhesive 7, and processed in this state. It is hot molded.

[0005]

[Problem that the idea aims to solve]

In the conventional heat pipe shown in Fig. 3, multiple heat pipes are lined up as shown in Fig. 4, and each heat pipe generates heat from each other. When embedding honeycomb sandwich panels by mechanically and structurally bonding them, the first step is to Only after adhesion and curing can it be inserted into the epidermis along with the honeycomb core. Becomes Noh. Skin and heat pipe between heat pipe envelope, skin and honeycomb By inserting the same thermosetting film-like adhesive between the cores, the skin, heat pipe, and surface Since the skin and honeycomb core can be bonded simultaneously during hot molding, the bonding process is done only once. However, gaps tend to form between the heat pipes due to thermal deformation during hot molding, and structurally, Although bonding is a single process, heat pipes are used during molding. The challenge was to improve the heat pipe so that there would be no gaps between them.

[0006]

[Means to solve the problem]

The heat pipe of this invention consists of two pipe walls in the same extruded envelope. During this process, the fastening material is applied in the longitudinal direction of the heat pipe while leaving a certain wall thickness on the pipe wall. A gap is provided that can be penetrated in orthogonal directions.

[0007]

[Effect]

The heat pipe based on this idea consists of two heat pipes made of a thermosetting film. It is possible to fix the adhesive material using scissors and a fastening material.

[0008]

【Example】

FIG. 1 is a diagram showing an embodiment of this invention. Figure 2 shows the heat pipe of this invention. Embedded in honeycomb sandwich panels widely used in the structure of artificial satellites FIG. In Figures 1 and 2, 1 to 8 are conventional It is the same as a heat pipe, and 9 is the air gap that is a feature of this invention. 10 is en A fastening material 11 fastens the envelopes 1a and 1b. A thermosetting film adhesive between heat pipes for adhesion.

[0009] As shown in Fig. 2, the envelopes 1a and 1b are thermosetting fibres With the lume-shaped adhesive 11 inserted, the fastening material 10 makes the gap 9 orthogonal to the longitudinal direction of the pipe. A thermosetting film-like film is formed between the envelopes 1a and 1b and the heat pipes. The adhesive 11 is held while applying compressive force.

0010

[Effect of the idea]

According to this idea, two heat pipes sandwich a film adhesive. Since it can be held with a fastening material, it is possible to make gluing into one process while creating a gap. It can be molded easily. The gap greatly reduces the weight of the heat pipe. On the other hand, it can be used as a pressure vessel for heat pipes without reducing its strength, and also reduces the thickness. Directional heat transfer is not significantly impaired.

[Brief explanation of drawings]

FIG. 1 is a diagram of a heat pipe showing one embodiment of this invention.

FIG. 2 is a diagram showing a heat pipe according to an embodiment of the invention embedded in a honeycomb panel.

FIG. 3 is a diagram showing a conventional heat pipe.

FIG. 4 is a diagram showing a conventional heat pipe embedded in a honeycomb panel.

[Explanation of symbols]

1 envelope 2 Pipe wall 3 Groove wick 4 Working fluid 5 Paste adhesive 6 Honeycomb core 7 Thermosetting film adhesive 8 Epidermis 9 void 10 Fastening material 11 Thermosetting film adhesive between heat pipes

Claims (1)

[Scope of utility model registration request] Claim 1: A heat pipe consisting of a longitudinal groove wick provided in the tube wall by extrusion, a working fluid sealed in the tube, and an envelope containing the groove wick and the working fluid is placed within the same extrusion cross section. A heat pipe having more than one heat pipe is characterized in that the envelope has a gap between the heat pipes so as to leave a certain thickness on the tube wall of the heat pipe, and a fastening material can penetrate in a direction perpendicular to the longitudinal direction of the pipe. heat pipe.