JPH02217790A - Heat pipe type sealed casing cooler - Google Patents

Abstract

PURPOSE:To permit the strong and highly air-tight attachment of a heat pipe to a partitioning plate by a method wherein a gap between the partitioning plate and the heat pipe or/and a fin is filled coated with an adhesive agent densely to attach the heat pipe to the partitioning plate. CONSTITUTION:A heat pipe 1 is provided with a predetermined number of fins 2 orthogonally to the axis of the pipe 1 while a partitioning plate 3 is provided between fins 2 at the part of a boundary between a heat receiving section 4 and a heat dissipating section 5 and the pipe 1 is arranged so as to be penetrated through the hole of the partitioning plate 3. The partitioning plate 3 is secured to the neighboring fin 2 at the heat receiving side 4 of the heat pipe 1 by applying adhesive agent 6 densely on the fin 2 while the heat pipe 1 is secured to the partitioning plate 1 by filling the adhesive agent 6 into a gap 7 between the pipe 1 and the plate 3. The partitioning plate 3, secured to the heat pipe 1 and the fin 2 in such a manner, is fixed to the partitioning plate mounting part 8 of a sealed casing by fastening bolts 10 through a packing 9 so as to be air-tight.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a heat pipe type closed case cooler that cools the inside of a closed case in which a control panel, an operation panel, etc. are disposed in a sealed state.

[Conventional technology]

A heat pipe type sealed case cooler is a heat pipe type sealed case cooler in which electronic and electrical equipment such as control panels and operation panels that are sensitive to dust are placed inside a sealed case, and the heat generated by the electronic and electrical equipment is transferred to the outside via a heat pipe while maintaining the airtight state. The structure is as shown in Figure 3 as an example of a ceiling-mounted heat pipe.
The heat receiving part 4 is placed on the inside air side of the sealed casing 12, and the heat radiating part 5 is placed on the outside air side above the ceiling. The heat is received by the heat receiving part 4 of the heat pipe 1, and this heat is radiated by the heat radiating part 5 located on the outside air side of the sealed casing 12 through the inside of the heat pipe 1.

Further, fins 2 are attached to the heat receiving part 4 and the heat radiating part 5 of the heat pipe 1, respectively, and air is applied by a fan to improve heat receiving and heat dissipating efficiency.

By the way, in order to install the heat pipe 1 in a sealed housing,
As shown in FIG. 2, the attachment is performed through the partition plate 3. That is, a hole with a diameter slightly smaller than the outer diameter of the heat pipe 1 is drilled in the partition plate 3 by burring, and the heat pipe 1 is press-fitted into this hole and attached.
This is done by tightening bolts to the sealed casing via gaskets (not shown).

[Invention tries to solve! i title]

However, with this mounting method, it was not possible to obtain sufficient airtightness between the partition plate and the heat pipe, and when attempting to increase the adhesion strength by making the partition plate thicker in order to improve airtightness, it became thicker. However, there were problems such as making assembly work more difficult and increasing costs.

[Means to solve problems]

The present invention was made in view of the above situation, and an object of the present invention is to provide a heat pipe type closed casing cooler that has excellent airtightness, is easy to assemble, and is low cost.

That is, in the present invention, a finned heat pipe consisting of a heat receiving part and a heat radiating part is installed in a sealed casing, with the heat receiving part placed on the inside air side of the sealed casing, and the heat radiating part placed on the outside air side of the sealed casing. In a heat pipe type sealed case cooler, a heat pipe or/and a fin is attached to a partition plate for separating the heat pipe into a heat receiving part and a heat dissipating part and attaching it to the sealed case, and an adhesive is placed in the gap between the heat pipe and the partition plate. It is characterized by being densely filled or coated with and fixed.

The configuration of the present invention will be specifically explained below with reference to the drawings.

FIG. 1 is a cross-sectional explanatory view showing an embodiment of the heat pipe mounting portion of the cooler of the present invention. In FIG. 0, 1 is a heat pipe, 2 is a fin, and 3 is a partition plate. A predetermined number of fins 2 are provided perpendicularly to the axis of the heat pipe 1, and a partition plate 3 is provided between the fins 2 at the boundary between the heat receiving section 4 and the heat dissipating section 5 of the heat pipe 1. The partition plate 3 is fixed to the adjacent fins 2 on the heat receiving part 4 side of the heat pipe 1 by densely applying adhesive 6 to the heat pipe 1. is firmly fixed by filling the gap 7 with adhesive 6.

The partition plate 3 fixed to the heat pipe 1 and the fins 2 obtained in this way is fixed by tightening the bolts 10 airtightly with a gasket 9 interposed in the part 8 to attach the partition plate to the sealed housing. .

Next, an example of the procedure for attaching the heat pipe to the partition plate is shown in the first section.
This will be explained with reference to the figures. First, holes are made in the fin 2 by burring, a predetermined number of fins 2 are arranged with the holes aligned, and the heat receiving part 4 of the heat pipe 1 is press-fitted into the hole to fix the fin 2 to the heat pipe 1. Next, a hole with a diameter slightly larger than the outer diameter of the heat pipe 1 is punched out in the partition plate 3, and the heat receiving part 4 of the heat pipe 1 is inserted into this hole.
the partition plate 3 is tightly applied to the adjacent lower fin 2 and pressed to fix it, and further, adhesive 6 is densely filled between the heat pipe 1 and the partition plate 3 to fix it, Thereafter, a predetermined number of fins 2 are press-fitted into the heat dissipation section 5 of the heat pipe 1 in the same manner as described above, and the fins 2 are assembled.

In the present invention, the partition plate 3 may be fixed only to the heat pipe 1, but as described above, the fin 2 and the heat pipe
It is preferable to fix it to both the upper and lower fins 2, or to fix it to a total of three places: the upper and lower two fins 2 and the heat pipe, as this makes the installation more solid and airtight.

The type of adhesive used in the present invention is not particularly limited, but thermosetting resin-based or elastomer-based adhesives are suitable, and in particular foamable adhesives that expand when heated and cured are suitable for use with heat pipes. This is preferable in order to improve the airtightness between the partition plates.

(Function) In the cooler of the present invention, the heat pipe is attached to the partition plate by densely filling or applying adhesive in the gap between the partition plate and the heat pipe or/and the fins. The heat pipe can be firmly and airtightly attached to the partition plate.Furthermore, since the attachment is done with adhesive, there is no need to use a thick plate for the partition plate, making assembly work easy and inexpensive.

〔Example〕

The present invention will be explained in detail below using examples.

To attach the heat pipe to the partition plate, an electronic control panel is placed inside a cooler with the structure shown in Figure 1, and this cooler is installed at a blast furnace work site where vibrations are strong and there is a lot of dust. tested for sex.

In the above cooler, the heat pipe 1 was a heat pipe unit in which 16 12φ heat pipes 1 were integrated through fins, and the partition plate 3 was a Zn-plated steel plate with a thickness of 2 mm. Further, the clearance between the heat pipe 1 and the partition plate 3 was set to 0.51, and the adhesive 6 was silicone sealant (manufactured by Toshiba Silicon Co., Ltd.).

For comparison, the dustproof performance of the conventional cooler shown in FIG. 2 was also tested in the same manner as above. In this cooler, a Zn-plated steel plate with a thickness of 2.7 mm was used for the partition plate 3 in order to increase the adhesion strength with the heat pipe.

After using the above two types of coolers continuously for one year, the conditions inside the coolers were observed.

The inside of the cooler of the present invention was kept clean, and the airtightness of the heat pipe attachment area was extremely good.

This is due to the fact that the heat pipes and fins are fixed to the partition plate by densely filling or applying an adhesive in their respective gaps.

On the other hand, in the conventional cooler, dust was allowed to enter the inside, and there were minute gaps between the partition plate 3 and the heat pipe 1. This is because the attachment of the heat pipe 1 to the partition plate 3 is simply mechanically sealed by press-fitting.
This is thought to be due to a creep phenomenon, etc.

Note that the heat pipe type sealed case cooler of the present invention has a third
In addition to the ceiling installation type shown in the figure, it can also be applied to a side or door installation type in which the heat pipe 1 is attached to the side or door of the sealed casing 12 as shown in FIG.

〔effect〕

As described above, the cooler of the present invention has excellent airtightness, is easy to assemble, and is low cost, so it has a significant industrial effect.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional explanatory view showing an example of the heat pipe installation part of the cooler of the present invention, Fig. 2 is a cross-sectional explanatory view of the heat pipe installation part of the conventional cooler, and Figs. FIG. 2 is an overall explanatory diagram of a cooler. ■... Heat pipe, 2... Fin, 3...
...Partition plate, 4...Heat receiving part, 5...Heat radiating part,
6... Adhesive, 12... Sealed casing. Patent distributor Furukawa Electric Co., Ltd.

Claims (1)

[Claims] A heat pipe type closed case cooling in which a finned heat pipe consisting of a heat receiving part and a heat dissipating part is installed in a sealed case, the heat receiving part is placed on the inside air side of the sealed case, and the heat radiating part is placed on the outside air side of the sealed case. In the device, a partition plate is used to divide the heat pipe into a heat receiving section and a heat dissipating section and attach it to the above-mentioned sealed casing.
A heat pipe type closed case cooler, characterized in that a heat pipe and/or a fin are fixed to the partition plate by densely filling or applying an adhesive in the gap between the heat pipe and the partition plate.