JP2009017611A - Metal-enclosed switchgear - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve ventilation performance by enlarging the area of a ventilation hole, in correspondence with the depth of a box. <P>SOLUTION: The switchgear is equipped with a box body 1, which household electrical appliance 5, an opening provided in the depth direction of the ceiling plate of the box 1, a roof 2 provided to cover the opening, a roof frame 6 for preventing the infiltration of rain water from the end of the roof 2, and the ventilation hole 10 provided in the depth direction of the flank of the roof frame 6. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a metal closed switchgear installed outdoors that can improve ventilation characteristics in a box.

As shown in FIG. 6, this type of conventional metal closed type switchgear has a roof 2 provided on the ceiling of the box 1, and ventilation is provided on the front side of the roof 2 and on the lower side of the flange 3 on the back side. A mouth 4 is provided. Thereby, when the electric equipment 5 such as a circuit breaker housed in the box body 1 generates heat, an increase in temperature is suppressed by the flow of air as indicated by an arrow. The roof 2 is provided with end frames 6 on both sides in the width direction of the box 1, and the box 1 is provided with a front door 7 and a back door 8 on both sides in the depth direction. 5 (for example, Patent Document 1)
reference).
JP 2003-56880 A (second page, FIG. 1)

The conventional metal closed switchgear described above has the following problems. The size of the ventilation port 4 depends on the size of the box body 1 in the width direction, and even if the depth direction increases or decreases, it is difficult to change the size of the ventilation port 4 correspondingly. That is, when the depth direction increases, the outer shape of the electric device 5 tends to increase in size and capacity, and the amount of heat generation tends to increase, but the area of the vent 4 is restricted by the width direction, and the box body In some cases, a temperature increase in 1 was caused. When the temperature rises, the energization performance of the electric device 5 may be lowered.

The present invention has been made to solve the above problems, and provides a metal closed type switchgear that can be installed outdoors, which can improve the ventilation characteristics by making the area of the ventilation opening correspond to the dimension of the box in the depth direction. For the purpose.

In order to achieve the above object, a metal closed switchgear according to the present invention covers a box that houses electrical equipment, an opening provided in a depth direction of a ceiling plate of the box, and covers the opening. , A roof frame for preventing rainwater from entering from the roof edge, and a ventilation port provided in the depth direction of the side surface of the roof frame.

According to the present invention, the opening is provided in the depth direction between the ceiling plate and the side plate of the box, and the ventilation opening is provided on the side surface in the depth direction of the roof frame that connects the roof covering the opening. The area of the ventilation opening can be increased corresponding to the size of the direction, and the temperature rise in the box can be suppressed.

  Embodiments of the present invention will be described below with reference to the drawings.

First, a metal closed switchgear according to a first embodiment of the present invention will be described with reference to FIGS. 1 is a side view showing a configuration of a metal closed switchgear according to Embodiment 1 of the present invention, FIG. 2 is a front view showing a configuration of a metal closed switchgear according to Embodiment 1 of the present invention, and FIG. These are the principal part expanded sectional views which show the structure of the metal closed type switchgear which concerns on Example 1 of this invention. In addition, in each figure, the same code | symbol was attached | subjected about the component similar to the past.

As shown in FIGS. 1 and 2, a roof 2 is provided on the ceiling of the box 1, and U-shaped end frames 6 are provided on both sides in the width direction of the roof 2. On both side surfaces of the end frame 6 in the depth direction, rectangular ventilation ports 10 formed from the front flange 3 to the rear flange 3 are provided. An electric device 5 such as a circuit breaker is accommodated in the box 1. Moreover, the front door 7 and the back door 8 are provided in the both sides of the depth direction, and the electrical equipment 5 etc. are inspected. The box 1 is a single board.

As shown in FIG. 3, the ceiling plate 11 between the ceiling plate 11 and the side plate 12 of the box 1 is provided with a groove-shaped opening 13 that maintains a predetermined interval in the depth direction. Opening 1 of the ceiling board 11
A first folded plate 15 having a U-shaped first bent portion 14 at the three ends is provided in the upper direction of the drawing, and a U-shaped second bent portion 16 is also provided on the side plate 12 side. Second folded plate 1
7 is provided in the upper direction of the figure. The first folded plate 15 and the second folded plate 17 are arranged substantially in parallel, and the bent portions 14 and 16 are bent outward. And
An end frame 6 is provided so as to surround them, and is connected to the roof 2.

Here, the ventilation port 10 is provided at a position lower than the bent portions 14 and 16 on the ceiling plate 11 side. The end frame 6 prevents rainwater from entering from the end of the roof 2 and is referred to as a roof frame here.

Thereby, the magnitude | size of the ventilation opening 10 can be changed with the opening part 13 with the magnitude | size of the depth direction of the box 1, and the area to ventilate can be varied. When the electric device 5 generates heat, an air flow as indicated by an arrow in FIG. 3 is generated, ventilation inside the box 1 is performed, and an increase in temperature can be suppressed. Moreover, since the 1st bending part 14 and the 2nd bending part 16 exist in a position higher than the ventilation port 10, it can prevent the penetration | invasion of rain water into the box 1 at the time of a wind and rain.

In addition, if a filter is provided in the ventilation port 10, it is possible to prevent dust from entering the box body 1 or salt damage. Further, in the case where large ventilation is not required, for example, when the amount of heat generated by the electrical device 5 is small, the ventilation port 10 may be provided on one side of the end frame 6, and further the length in the depth direction may be shortened. Good.

According to the metal closed type switchgear of the first embodiment, the opening 13 is provided in the depth direction between the ceiling plate 11 and the side plate 12 of the box 1, and the end frame 6 covering the opening 13 in the depth direction is provided. Since the ventilation port 10 is provided on the side surface, the ventilation area can be varied according to the size in the depth direction, and the temperature rise in the box 1 can be suppressed.

Next, a metal closed switchgear according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 4 is a front view showing a configuration of a metal closed switchgear according to a second embodiment of the present invention;
FIG. 5 is an enlarged cross-sectional view of the main part showing the configuration of the metal closed switchgear according to Embodiment 2 of the present invention. The difference between the second embodiment and the first embodiment is that the boxes are arranged in a row. In each figure, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

As shown in FIG. 4, a plurality of boxes 1 are arranged, and a U-shaped connection frame 20 is provided between the roofs 2, and the roofs 2 are connected to each other. On both sides of the side surface in the depth direction of the connecting frame 20, rectangular ventilation ports 21 are provided. Note that the end frames 6 similar to those of the first embodiment are provided on the box 1 at both ends of the line.

In the connection frame 20, as shown in FIG. 5, a groove-shaped opening 24 is provided in the ceiling plate 22 between the one ceiling plate 22 and the side plate 23, maintaining a predetermined distance in the depth direction. . At the end of the opening 24, a third folded plate 26 having a U-shaped third bent portion 25 is provided in the upper direction of the drawing. The ceiling plate 27 between the other ceiling plate 27 and the side plate 28 is also provided with a groove-shaped opening 29 that maintains a predetermined distance in the depth direction. At the end of the opening 29, a fourth folded plate 31 having a U-shaped fourth bent portion 30 is provided in the upper direction of the drawing. The third folded plate 26 and the fourth folded plate 31 are arranged substantially in parallel, and the bent portions 25 and 30 are arranged.
Are folded outward.

Here, the ventilation port 21 is provided at a position lower than the bent portions 25 and 30 on the ceiling plates 22 and 27 side, respectively. Note that the ventilation port 21 may be provided on one side of the connection frame 20 or the length in the depth direction may be shortened when large ventilation is not required, such as a small amount of heat generated by the electrical device 5.

Thereby, it becomes an air flow as shown by the arrow in a figure, ventilation in the box 1 is performed, and a temperature rise can be suppressed. The connection frame 20 prevents intrusion of rainwater from the ends of the roof 2, and is referred to as a roof frame in the same manner as the end frame 6.

According to the metal closed switchgear of the second embodiment, in addition to the effects of the first embodiment, the temperature rise in the box 1 can be suppressed by the ventilation port 21 provided in the connecting frame 20 even at the time of queuing. Can do.

The side view which shows the structure of the metal closed type switchgear which concerns on Example 1 of this invention. The front view which shows the structure of the metal closed type switchgear which concerns on Example 1 of this invention. The principal part expanded sectional view which shows the structure of the metal closed type switchgear which concerns on Example 1 of this invention. The front view which shows the structure of the metal closed type switchgear which concerns on Example 2 of this invention. The principal part expanded sectional view which shows the structure of the metal closed type switchgear which concerns on Example 2 of this invention. The side view which shows the structure of the conventional metal closed type switchgear.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Box 2 Roof 3 Gutter part 4, 10, 21 Ventilation opening 5 Electric equipment 6 End part frame 7 Front door 8 Rear door 11, 22, 27 Ceiling board 12, 23, 28 Side board 13, 24, 29 Opening part 14 , 16, 25, 30 Folded part 15, 17, 26, 31 Folded plate 20 Connection frame

Claims (5)

A box for storing electrical equipment;
An opening provided in the depth direction of the ceiling plate of the box,
A roof provided to cover the opening;
A roof frame for preventing rainwater from entering the roof edge;
A metal-enclosed switchgear comprising a ventilation opening provided in a depth direction on a side surface of the roof frame. The box is a single board,
2. The metal closed switchgear according to claim 1, wherein the roof frame is an end frame provided on both sides in the width direction of the roof and connected to the roof. The box is lined up,
The metal closed switchgear according to claim 1, wherein the roof frame is a connection frame that connects the roofs. 4. The metal closed switchgear according to claim 1, wherein a folded plate is provided in the opening so as to prevent rainwater from entering a position higher than the ventilation port. 5. The metal closed switchgear according to any one of claims 1 to 4, wherein a filter is provided in the ventilation port.

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