JPH02155408A - Cooling device for gas insulation cubicle - Google Patents

Abstract

PURPOSE:To enable cooling the title cubicle effectively without providing a fan within said cubicle by providing a cover with fans adjoining a closed case body and circulating an external air and also by providing a heat pipe, of which heat-receiving and heat-dissipating parts are respectively arranged within said case body and within said cover. CONSTITUTION:When a breaker 21 and conductor 22 housed in a cubicle 2 generate heat, an internal insulating medium C is heated and introduced into the heat-receiving part 14a of a heat pipe 14 so that the operating fluid of said heat pipe 14 moves to the heat-dissipating part 14b thereof. When fans 18 are driven, external air D discharges the heat of said heat-dissipating part 14b to the outside. The vapor of the cooled operating fluid returns to the heat- receiving part 14a. Thus, said cubicle 2 can be effectively cooled without provision of a fan within the cubicle 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a cooling device for a gas insulated cubicle in which an insulating medium such as SF6 gas is sealed at approximately atmospheric pressure.

(Prior Art) FIG. 5 is a sectional view showing an example of a conventional cooling device for a closed structure using a heat pipe (Japanese Patent Application Laid-open No. 116913/1983).

In the figure, 1 is a box attached to the side of a cubicle 2 so that internal air A can be introduced, 3 is a partition plate that separates the inside of the box 1 into internal air A and external air B, and 4 is an internal A plurality of heat pipes are supported through the partition plate 3 so that the heat receiving part 4a contacts the air A, the heat radiating part 4b contacts the external air B, and is arranged parallel to the side surface of the cubicle 2.

Next, the operation will be explained. Due to heat generated by electrical equipment (not shown) housed inside the cubicle 2,
Internal air A is heated and its temperature increases. This internal air A
is guided by the internal fan 5 to the upper half of the heat receiving part 4a of the heat pipe 4 inside the box 1. After passing through the upper half of the heat receiving section 4a of the heat pipe 4, the internal air A changes direction, passes through the lower half of the heat receiving section 4a of the heat pipe 4 again, and returns to the inside of the cubicle 2 for circulation.

On the other hand, the external air B is guided by the external fan 6 to the lower half of the heat radiation section 4b of the heat pipe 4. External air B is
After passing through the lower half of the heat radiating section 4b of the heat pipe 4, the direction is changed, passing through the upper half of the heat radiating section 4b of the heat pipe 4 again, and emitted to the outside.

By repeating this operation, the cubicle 2
to cool the inside of.

(Problem to be solved by the invention) Since the conventional cooling device is configured as described above,
When an insulating medium such as SF6 gas is sealed inside the cubicle 2, even if an internal fan 5 is used in the box 1, a normal fan cannot be used for an insulating medium such as SF6 gas, and a special fan is required. The cost will also be higher. In addition, since there is an internal fan 5 inside the cubicle 2,
The power source for the internal fan 5 must be provided outside, and consideration must be given to sealing the wiring part. Furthermore, if the internal fan 5 breaks down, it must be replaced;
In this case, the enclosed insulating medium must be discharged and replaced with a new insulating medium, which increases the cost of replacement.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a cooling device for a gas-insulated cubicle that can lower the temperature of the insulating medium inside the cubicle and effectively cool the circuit breaker, conductor, etc. housed inside the cubicle without installing a fan inside the cubicle. It's about doing.

[Structure of the invention]

(Means for Solving the Problems) The present invention provides a closed box body disposed above a gas insulated cubicle that houses electrical equipment and encloses an insulating medium, and into which the insulating medium can be introduced; a cover adjacent to the cover and having a fan for forcing external air circulation;
It is composed of a heat pipe with a heat receiving part arranged inside the closed box body and a heat radiating part arranged inside the cover.

(Function) The insulating medium whose temperature has risen due to the heat generated by the electrical equipment is introduced into the inside of the closed box. Therefore, the heat receiving part of the heat pipe is heated by this insulating medium, and the working fluid inside evaporates. This evaporated working fluid passes through the inside of the heat pipe and moves to the heat radiation section.

However, the heat radiating section is cooled by external air flowing through it, and the evaporated working fluid is liquefied and returns to the heat radiating section through the heat pipe. Therefore, the gas insulated cubicle can effectively radiate heat generated inside the cubicle to the outside while remaining in a sealed state.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a sectional view of an embodiment of the present invention.
FIG. 2 is an enlarged view of the X section in FIG. 1;

In FIGS. 1 and 2, 0 is a pressure box attached to the ceiling surface of the cubicle 2 so that an internal insulating medium C such as SF6 gas sealed in the cubicle 2 can be introduced. This pressure-resistant box IO has an open lower surface, maintains airtightness at the edge via the ceiling surface of the cubicle 2 and the backing 11, and has an open side surface (the right side in FIG. 1), and this opening has the backing 12 A partition plate 13 that maintains airtightness is attached through the partition plate 13. Reference numeral 14 designates a plurality of heat pipes installed in an inclined manner in the pressure box 10 so that the heat receiving part 14a contacts the internal insulating medium C and the heat radiating part 14b contacts the external air chamber. The heat pipe 14 has its end on the heat receiving part 14a side supported by the pressure box 10 via appropriate metal fittings, the middle part passing airtightly through the partition plate 13 and being supported, and the end part on the heat radiating part 14b side being covered. It is supported by a box 15.

This cover box 15 is arranged on the side surface of the pressure box 10 on the opening side, and is fixed to the pressure box 10 on this side with bolts 1G, and has a lower surface with an appropriate gap G with the ceiling surface of the cubicle 2. The end (on the left in Figure 1) is supported on the ceiling surface of the cubicle 2 by a support part 15a, and the other end is supported on the ceiling surface of the cubicle 2 by a bolt 15b that can be adjusted freely in the height direction. . In addition, the cover box 15 is equipped with a number of stages of filters 17 on the bottom side.
A plurality of fans 18 are attached to the upper surface side. Note that the end of the heat pipe 14 on the side of the heat dissipation part 14b is attached to a bolt 1 that can be freely adjusted in the length direction and height direction through an appropriate metal fitting.
It is supported by the cover box 15 at 9. In addition, the cover box 15 has bolts l fixed to the pressure box IO.
6 screw holes 15c (shown in FIG. 3) are provided at the end of the pressure box IO side.

FIG. 3 is an explanatory diagram showing how the cover box 15 is attached. That is, as described above, the heat pipe 14
The pressure-resistant box 10 with the attached pressure box 10 is fixed to the ceiling surface of the cubicle 2 so that the internal insulating medium C is introduced. Since the heat pipe 14 protrudes from the pressure box 10, the cover box 15 is lifted up and moved from the side in the direction indicated by the arrow 20 in the same figure, and dropped onto the ceiling surface of the cubicle 2 slightly before the predetermined position. , adjust the position,
Mounting hole 10a of pressure box 10 and cover box 15
Align the screw holes 15c and tighten the bolt I6.

Next, the operation of the above embodiment will be explained. When the circuit breaker 21 and the conductor 22 housed in the cubicle 2 generate heat due to energization, the internal insulating medium C is heated and the temperature rises. The internal insulating medium C whose temperature has increased is introduced into the heat receiving part 14a of the heat pipe 14 in the pressure-resistant box IO. When the heat receiving part 14a of the heat pipe 14 is heated by this introduction, the working fluid in the heat pipe 14 evaporates while removing heat in the form of latent heat of vaporization, and the vapor passes through the heat pipe 14 and passes through the heat dissipating part. Move to 14b.

On the other hand, when the fan 18 is driven, external air is sucked in through the gap G between the cover box 15 and the cubicle 2, and the dust contained therein is removed by the filter 17 before being introduced into the cover box 15. . By this introduction, heat is taken away from the heat dissipation part 14b of the heat pipe 14, the temperature rises, and the fan 18 discharges the heat to the outside.

The vapor of the working fluid in the heat pipe 14 cooled by the external air is condensed and liquefied, and then flows back to the heat receiving section 14a. By repeating this operation, the internal insulating medium C
The heat is transferred to the external air chamber and released, allowing the cubicle 2 to be cooled while remaining sealed.

FIG. 4 shows the experimental results of the present invention and the conventional configuration shown in FIG. 5 described above, but without an internal fan, that is, with only an external fan. In the conventional configuration, large temperature differences occur at different locations (or positions) within the cubicle, but with the present invention, the temperature differences at different locations (or locations) are extremely small, and the temperature rise itself is also low. ing. In other words, the present invention shows that the gas insulated cubicle can be cooled extremely effectively.

〔Effect of the invention〕

As explained above, according to the present invention, inside the pressure-resistant box provided so that the internal insulating medium of the cubicle can be introduced,
A heat pipe is installed that is supported through the partition plate that separates the internal insulating medium from the external air.The heat receiving part of this heat pipe receives heat by natural convection, and the external air is forced by a fan to Since the heat dissipation part is cooled, it is possible to provide a cooling device for a gas-insulated cubicle that can effectively cool the cubicle in a sealed state without providing a fan inside the cubicle as in the conventional case.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing one embodiment of the present invention, and FIG.
3 is an explanatory diagram showing the procedure for installing a cover box according to an embodiment of the present invention, and FIG. 4 is a line showing a comparison of the effects of the present invention with a conventional configuration with some changes. FIG. 5 is a sectional view showing the configuration of a conventional cooling device for a closed structure. 2...Cubicle, 1o...Pressure box,
13... Partition plate, 14... Heat pipe, 14a... Heat receiving part, 14b... Heat radiation part, 15... Cover box, C... Internal insulating medium, D... External air. Agent Patent attorney Yoshiaki Inomata (and 1 other person)

Claims (1)

[Claims] A closed box body that is placed above a gas insulated cubicle that houses electrical equipment and is filled with insulating gas and that allows the introduction of an insulating medium, and a fan that is adjacent to this closed box body and that forces external air to circulate. 1. A cooling device for a gas-insulated cubicle, comprising: a cover having a heat receiving section disposed inside the closed box; and a heat pipe having a heat dissipating section disposed inside the cover.