JPS6144238B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat panel, and more particularly to a heat panel that provides electrical insulation between a heat receiving part and a heat radiating part.

In general, heat panels used for heat dissipation in power equipment and electronic equipment are made by laminating metal plates made of copper or the like to form a hollow part with a sealed structure, and a heat receiving part and a heat dissipating part are provided in the hollow part. It is used.

Conventionally, so-called metal panel heat panels,
A wire made of insulating material such as glass fiber, cloth, or felt is stored in the hollow part of a sealed structure formed by a panel made of metal plate, and methanol, Freon (trade name) or ammonia is stored in the hollow part of the panel. It is constructed by enclosing an insulating refrigerant (working fluid) such as

However, this metal heat panel has the inconvenience of having to be attached to electrical equipment via an insulator because it does not have electrical insulation.

Therefore, a heat panel using a panel made of ceramic has been introduced, but although this heat panel has electrical insulation properties, there are problems such as poor heat conduction efficiency of the heat receiving and radiating parts.

The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a heat panel that has good heat conduction efficiency and excellent electrical insulation properties.

The present invention will be explained below with reference to the drawings showing embodiments thereof.

As shown in FIGS. 1A and 1B, the electrically insulating heat panel according to the present invention includes a panel 1 made of an insulating material and a cylindrical shape made of an insulating material inserted into an insertion hole 1a provided in the panel 1. The wick 2 and the sealing fittings 3, 3 which are connected to the end of the wick 2 and hermetically seal the end of the insertion hole 1a, and the insertion hole 1.
It is composed of an insulating refrigerant (not shown) sealed in a and metal end plates 4, 4, etc. that are fixed to the panel 1 by engaging with sealing fittings 3, 3.

The panel 1 is made of an inorganic insulating material such as glass or ceramic, or an organic insulating material such as a synthetic resin, and is formed into a rectangular plate shape as shown in Fig. 2, and its body has a plate surface and a plate surface. A plurality of substantially circular insertion holes 1a for the wicks 2 are provided which penetrate in a planar direction and are parallel to each other.

The wick 2 is formed into a cylindrical shape made of, for example, glass fiber, cloth, or felt, and sealing fittings 3, 3 serving as a heat receiving part or a heat radiating part are hermetically fitted at both ends thereof.

Each of the sealing fittings 3, 3 is made of a metal material with high thermal conductivity such as copper or copper alloy, and as shown in FIG. A screw hole 3a is formed at the end of the part protruding from the panel 1 for screwing a mounting bracket (described later), and a heat receiving hole 3a is formed at the inner end.
A connecting portion 3b for enhancing the heat dissipation effect and connecting the ends of the wick 2 is formed to have an appropriately smaller diameter than the inner diameter of the wick 2, and protrudes appropriately inward from the end of the wick 2. A recess 5 that opens inward is provided at the axial center of the connecting portion 3b.

In addition, when fitting the sealing fittings 3, 3 to both ends of the insertion hole 1a of the panel 1, if the panel 1 is made of glass or ceramic, etc., copper or a copper alloy, etc. is metalliconed, and the panel 1 and the sealing fittings 3, 3 are hermetically joined by welding or brazing through the metallization of this metallicon, and when the panel 1 is made of synthetic resin, they are hermetically joined by adhesive. .

Further, as shown in FIG. 3, one of the sealing fittings 3 is provided with a communication hole 6 that penetrates the body of the connecting portion 3b in the radial direction (left-right direction in FIG. 3). Further, a recess 7 that opens outward is provided at the axial center of the threaded portion 3a, and this recess 7 and the recess 5 of the connecting portion 3b are connected to a pipe insertion hole 8 in the axial direction (vertical direction in FIG. 3). communicated via. An enclosure pipe 9 for enclosing a refrigerant by vacuum displacement to be described later is inserted into the pipe insertion hole 8 from the recess 7 side of the screw hole 3a and is hermetically fixed by brazing or the like. Furthermore, recesses 10a provided at both ends of an insulating core rod 10 made of, for example, porcelain, which is housed in the wick 2, are fitted into the recesses 5 of each connecting portion 3b. The outer diameter of the core rod 10 is appropriately smaller than the inner diameter of the wick 2,
On the other hand, the outer diameter of the convex portion 10a is appropriately smaller than the concave portion 5 of the connecting portion 3b.

Each metal end plate 4 is provided with a plurality of recesses 4a on its end surface. The recess 4a is approximately circular, and its diameter is the same as or slightly larger than the outer diameter of the sealing fitting 3.

In order to manufacture the heat panel having the above-described structure, first, a metal coating is formed in advance around the inner circumferential surface of both ends of the insertion hole 1a of the panel 1 using metallicon. Next, the end of the wick 2 with the insulating core rod 10 inside is fitted into the connection part 3b of one sealing metal fitting 3 to which the enclosing pipe 9 is attached and the other sealing metal fitting 3, and this wick 2 is attached. After penetrating each of the sealing metal fittings 3 into the insertion hole 1a of the panel 1 with the threaded portion 3a protruding, each of the sealing metal fittings 3 is inserted.
is hermetically sealed to the edge of the panel 1 by brazing or welding. In addition, panel 1 made of synthetic resin
In this case, each sealing fitting 3 is hermetically sealed to the panel 1 with an adhesive without forming a metal coating with metallicon in advance.

After each sealing fitting 3 is sealed to the panel 1 as described above, the inside of the insertion hole 1a is evacuated through the sealing pipe 9, and then a predetermined amount of an insulating refrigerant such as methanol, freon, or ammonia is injected. Then, the end of the enclosing pipe 9 is pinch-cut so that it slightly protrudes from the end face of one of the sealing fittings 3 or is positioned within the recess 7.

Finally, after fitting each metal end plate 4 with its concave portion 4a into the end protruding from the panel 1 of the sealing fitting 3 inserted through the panel 1, the flat head and threaded portion are inserted through the screw hole 3a. When screwed to each sealing fitting 3 using mounting fittings 11, 11, which have an insertion hole on one side for inserting the pinch-cut enclosing pipe 9, the sealing fittings 3 are fixed in close contact with the panel 1 and heated. The panel is completed.

Although the embodiment has been described in which the insertion holes 1a penetrate through the body of the panel 1 in parallel with each other, the invention is not limited to this, and as shown in FIGS. 4 and 5, It may be provided so as to protrude from both plate surfaces or from only one plate surface, and in this case, the weight of the panel 1 can be reduced.

Further, although the embodiment has been described in which the cross-sectional shape of the wick insertion hole 1a is approximately circular, the shape is not limited to this, and for example, the cross-section may be formed to be approximately square or rectangular.

As explained above, the present invention provides an electrically insulating panel in which sealing fittings are connected to both ends of a plurality of wick insertion holes that penetrate through the body of the electrically insulating panel in a direction parallel to the board surface and are parallel to each other. After inserting the cylindrical wicks and airtightly sealing both ends of each wick insertion hole with the respective sealing fittings protruding from the opposite sides of the panel and fitted, insulating refrigerant is poured into each wick insertion hole. A heat panel is constructed by enclosing the heat panel, engaging the recess of the metal end plate with the end of each sealing fitting on the opposing side of the panel, and fixing the metal end plate to the panel via the sealing fitting. Therefore, it has electrical insulation properties, and has good heat reception and radiation efficiency, and can improve heat conduction efficiency. Furthermore, since the heat panel is fitted with a sealing fitting in advance and inserted into the insertion hole in the panel, it is possible to easily manufacture the heat panel.

[Brief explanation of the drawing]

1A, B, 2, 3, 4 and 5 show an embodiment of the present invention, and FIG.
1B is a partially sectional front view, FIG. 1B is a side sectional view, FIG. 2 is a perspective view of the main parts, FIG. The figure is a perspective view of main parts. DESCRIPTION OF SYMBOLS 1... Panel, 1a... Insertion hole, 2... Wick, 3... Sealing fitting, 3a... Threaded part, 3b...
Connecting portion, 4... Metal end plate, 4a, 5, 7... Recess, 6... Communication hole, 8... Pipe insertion hole, 9...
Enclosed pipe, 10... core rod, 11... mounting bracket.

Claims (1)

[Claims] 1 A panel made of an insulating material, in which a plurality of wick insertion holes are provided in a panel made of an insulating material in a direction parallel to the board surface and parallel to each other, and sealing fittings are connected to each of the wick insertion holes at both ends. A cylindrical wick is inserted, and both ends of each wick insertion hole are hermetically sealed with respective sealing fittings that protrude from the opposing sides of the panel and are inserted, and each wick insertion hole is filled with an insulating refrigerant. 1. A heat panel characterized in that metal end plates each having a recess that can be freely engaged with an end of each sealing fitting are attached to opposing sides of the panel.