KR20140028547A

KR20140028547A - Distributing board

Info

Publication number: KR20140028547A
Application number: KR1020120095058A
Authority: KR
Inventors: 박기주; 김성만
Original assignee: 주식회사 케이디파워; 박기주
Priority date: 2012-08-29
Filing date: 2012-08-29
Publication date: 2014-03-10

Abstract

According to an aspect of the present invention, by easily discharging high temperature heat generated from an electric device inside a switchgear to the outside, a switchgear for improving the cooling efficiency of the switchgear and at the same time extending the life of the electric switchgear is provided. The switchgear according to the embodiment of the present invention includes an enclosure case having an upper plate, a lower plate, and both side plates; and front and rear doors respectively installed at both front and rear sides of the enclosure case; and the enclosure case. Electrical equipment provided in the internal space of the plurality of air, respectively provided on the lower plate and the front and rear doors of the enclosure case to cool the electrical equipment for introducing external cool air into the interior space of the enclosure case An inlet; and the upper and rear doors and the front doors of the enclosure case, respectively, for the enclosure k. And a plurality of air outlets forming a plurality of air circulation passages with the plurality of air inlets to discharge hot air from the inside to the outside.

Description

Distributing board

The present invention relates to a switchgear, and more particularly, by easily discharging the high temperature heat generated from the electrical equipment inside the switchgear to the outside to improve the cooling efficiency of the switchgear and at the same time extend the life of the internal electrical device. It's about a switchboard that makes it work.

In general, the power and distribution system is a power supply system that converts power from special high voltage to low voltage and supplies electric power to apartments, buildings, schools, factories, ports, etc. Generally, it has capacity of 80-700 kW.

Most of the switchgear equipments include a transformer, an optimum operation controller of the transformer, a power monitoring controller, etc., and a single-enclosure high-low-pressure one-piece type having a multi-layered structure for preventing external moisture and foreign matter from entering, .

In particular, the power monitoring controller installed inside the high and low pressure integrated switchboard processes the sensed values of the temperature sensor and the current voltage sensor to extract information such as the operating temperature, load factor, phase loss factor, power factor, harmonic factor, and imbalance ratio of the high voltage transformer It is also notified to the administrator through the LCD display attached to the power monitoring controller and also transmitted to the remote management system through the communication interface device.

The switchgear according to the prior art includes an enclosure case for accommodating various electrical devices, a pair of doors provided with a viewing window for seeing the interior of the enclosure case, various electrical appliances housed in the enclosure case, and an air inlet portion at the lower side of the enclosure case. It is configured to include.

The air inlet portion is formed so that external cold air is drawn into the enclosure case and a blowing fan is installed at an upper portion of the enclosure case to exhaust heat discharged from various electric appliances accommodated in the enclosure case .

That is, the cold air introduced into the air inflow portion is discharged to the outside through the inside of the enclosure case through the air blowing fan, so that the cold air drawn from the outside is supplied into the enclosure case to effectively cool various electric devices in the enclosure case .

However, in the conventional switchgear as described above, air trapped phenomenon occurs in some areas of the enclosure case while the outside cold air flowing through the air inlet moves along a single air circulation passage.

As a result, the above-mentioned power transmission and reception system has a problem that the heat generated in the electric equipment in the internal space can not be effectively discharged to the outside, resulting in an inefficient efficiency of the transmission and distribution system and a shortened life span.

According to an aspect of the present invention, by easily discharging high temperature heat generated from an electric device inside a switchgear to the outside, a switchgear for improving the cooling efficiency of the switchgear and at the same time extending the life of the electric switchgear is provided. Is in.

Another aspect of the present invention has a plurality of air inlet and formed in a plurality of positions of the switchgear having a plurality of air circulation path through the air distribution panel that can minimize the area where the air trapping phenomenon occurs inside the enclosure case It is to offer.

The switchgear according to the embodiment of the present invention includes an enclosure case having an upper plate, a lower plate and both side plates; and front and rear doors respectively installed at both front and rear sides of the enclosure case; and in an inner space of the enclosure case. And a plurality of air inlets provided at each of the lower plate and the front and rear doors of the enclosure case to cool the electrical equipment, for introducing cold air into the inner space of the enclosure case. And a plurality of air discharges provided on the upper plate and the front and rear doors of the enclosure case to form a plurality of air circulation passages between the plurality of air inlets for discharging hot air to the outside. It characterized in that it comprises a.

In addition, the plurality of air inlet, the first air inlet is provided in a plurality of discontinuously on the lower plate of the enclosure case; and the second air inlet provided in each of the lower portion of the sight window of the front and rear doors; It features.

In addition, the plurality of air discharge, the first air discharge is provided in the upper center of the enclosure case, respectively forming a first air circulation flow path and the first air circulation flow path between the first air inlet and the second air inlet; And a second air discharge part provided at upper portions of the viewing windows of the front and rear doors, respectively, to form a second air circulation flow path and a second air circulation flow path between the first air inlet and the second air inlet. It characterized by including.

In addition, the first air inlet, the first filter unit having a first mesh filter is provided in each of the plurality of first inlet formed at a predetermined interval along the lower plate circumference of the enclosure case to purify the outside cold air Characterized in that it comprises a.

In addition, the second air inlet, characterized in that it comprises a second filter unit which is provided in the second inlet formed in the lower portion of the sight window of the front and rear doors respectively to clean the outside cold air flows.

The first air exhaust unit may include a first blowing fan provided at a center of the upper plate of the enclosure case and positioned at a first exhaust port, which is a passage through which hot air inside the enclosure case is discharged to the outside; And a first blower fan cover spaced apart from the first blower fan at an upper portion thereof, wherein the second air discharge unit is provided at upper portions of the sight windows of the front and rear doors to discharge hot air from the inside of the enclosure case to the outside. And a second blower fan disposed at a second outlet, which is a passage, and a second blower fan cover spaced apart from the second blower fan at a side of the second blower fan.

The first mesh filter may include a first filter installed at the first inlet to purify external cold air, a first mesh installed at an inner side of the first filter, and the other side of the first filter. It characterized in that it comprises a second mesh is installed.

In addition, the second filter unit, a second filter for purifying the air flowing into the second inlet formed in the lower portion of the sight window of the front and rear doors, a second suction grill mounted on the front of the second filter, and And a second fastening member for mounting the second filter between the second filter and the second inlet.

The second fastening member may further include second fastening grooves respectively formed at both sides of the upper end of the second inlet for mounting the second filter to the second inlet, and the second fastening groove to be fitted into the second fastening groove. And second fastening rods respectively formed on both sides of the upper rear side of the filter.

In addition, the plurality of air inlet, characterized in that it further comprises a third air inlet provided on the lower edge of the upper plate of the enclosure case.

Looking at the switchgear according to an embodiment of the present invention from the other side, an enclosure case having an upper plate, a lower plate and both side plates, front and rear doors respectively installed on both front and rear sides of the enclosure case, and the interior of the enclosure case Electrical apparatus provided in the space, the upper plate, the lower plate, the front and rear doors of the enclosure case, respectively, a plurality of air inlet for introducing external cool air into the interior space of the enclosure case, and the case of the enclosure case It is provided on the upper plate and the front and rear doors, respectively, characterized in that it comprises a plurality of air discharge for discharging the heat emitted from the electric machine to the outside of the enclosure case.

In addition, the plurality of air inlet, the first air inlet is provided in a plurality of discontinuously on the lower plate of the enclosure case, the second air inlet provided in the lower portion of the sight window of the front and rear doors, respectively, A third air inlet is provided on the upper plate, wherein the plurality of air outlets, the first air inlet, the second air inlet and the third air inlet is provided in the upper center of the enclosure case; A first air discharge portion forming an air circulation passage, a first B air circulation passage, and a first C air circulation passage, and an upper portion of the viewing window of the front and rear doors, respectively, wherein the first air inlet portion, the second air inlet portion, And a second air discharge portion forming a second A air circulation passage, a second B air circulation passage, and a second C air circulation passage between the third air inlets.

Therefore, the switchgear according to the embodiment of the present invention has various air circulation paths through a plurality of air inlets and a plurality of air outlets formed at various positions of the switchgear, thereby minimizing an area where air trapping occurs in the enclosure case. There is an effect that can be done.

In addition, the switchgear according to the embodiment of the present invention, by easily discharging the high temperature heat generated from the electrical equipment inside the enclosure case to the outside to improve the cooling efficiency of the switchgear and at the same time extend the life of the internal electrical equipment. It has the effect of making it possible.

1 is a front view showing a switchgear according to an embodiment of the present invention.
2 is a perspective view showing a switchgear according to an embodiment of the present invention.
3 is a cross-sectional view illustrating the switchboard shown in FIG. 2.
4 is a view showing a first air inlet of the switchboard shown in FIG.
5 and 6 are views showing a second air inlet of the switchgear shown in FIG.
7 is a cross-sectional view showing a switchgear according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a front view showing a switchgear according to an embodiment of the present invention, Figure 2 is a perspective view showing a switchgear according to an embodiment of the present invention, Figure 3 is a cross-sectional view showing a switchgear shown in Figure 2, Figure 4 2 is a view showing a first air inlet of the switchgear shown in Figure 2, Figure 5 and 6 is a view showing a second air inlet of the switchgear shown in FIG.

As shown in Figures 1 to 6, the switchgear 10 according to an embodiment of the present invention, an enclosure case having an upper plate 110, a lower plate 120 and both side plates 130 to have an inner space 100, the front door 200 and the rear door 300 are installed on both the front and rear sides of the enclosure case 100, the electrical device 400 is installed in the enclosure case 100, the enclosure case The air inlet 500 is formed in the upper plate 110, the lower plate 120, the front door 200, the rear door 300 of the (100) and the outside air is introduced, and the upper plate of the enclosure case 100 110, the front door 200, the rear door 300 is formed to include an air discharge unit 600 for discharging the air inside.

The enclosure case 100 includes a side plate 130 forming a side structure of the switchboard 10 to have a rectangular cross-sectional shape, an upper plate 110 coupled to an upper surface of the side plate 130, and a lower surface of the side plate 130. It includes a lower plate 120 to be coupled. However, such an enclosure case 100 can be applied not only to have a rectangular cross-sectional shape but also to a case of a polygonal shape.

The front door 200 is installed to be opened and closed at the front of the enclosure case 100 for limiting direct contact with the outside and for the internal inspection and maintenance, the front door 200 is made of a sandwich panel therein Flame retardants may be filled.

In addition, the rear door 300 is installed to be opened and closed at the rear of the enclosure case 100 for limiting direct contact with the outside and for the internal inspection and maintenance, the rear door 300 is made of a sandwich panel The flame retardant may be filled inside.

An electric device 400 is installed in an inner space of the enclosure case 100, and the electric device 400 according to the embodiment of the present invention may include a transformer 400.

Transformer 400 serves to transform the extra-high voltage electricity supplied from the power supply to the appropriate voltage for the purpose. However, in one embodiment of the present invention, the electrical device 400 has been described using the transformer 400 as an example, but is not limited thereto and may include any electrical device 400 mounted inside the enclosure case 100. Of course.

The switchboard 10 according to an embodiment of the present invention includes a plurality of air inlets 500 and circulated therein for circulating the heat discharged from the electric device 400 installed inside the enclosure case 100 to the outside. It is configured to include a plurality of air outlet (600).

The plurality of air inlets 500 are configured to introduce external cold air into the interior of the enclosure case 100 of the switchboard 10, and the plurality of air inlets 500 may include a lower plate of the enclosure case 100. The first air inlet 510 is provided with a plurality of discontinuously, and the second air inlet 520 provided in the front and rear doors (200, 300), respectively.

The first air inlet 510 is provided at a plurality of first inlets (not shown) formed at predetermined intervals along the periphery of the lower plate 120 of the enclosure case 100 to purify the external cold air introduced therein. It comprises a one filter unit 511.

The first filter unit 511 may include a first mesh filter 511 in which the first mesh 511B and the second mesh 511C are integrally assembled with each other on both side surfaces of the first filter 511A.

The first mesh filter 511 is installed at a first inlet (not shown) to purify external cold air, and a first mesh (511A) installed on an inner surface of the first filter (511A). 511B and a second mesh 511C provided on an outer surface of the first filter 511A.

Therefore, the cold air introduced from the outside through the first air inlet 510 starts to flow from the outer lower portion of the enclosure case 100 in a state where the air is purified by the first filter unit 511 and thus the enclosure case ( 100) After passing through the electric device 400 disposed in the inner lower portion, it is possible to efficiently cool the electric device 400 while flowing to the inner upper portion of the enclosure case 100.

On the other hand, the first filter unit 511 is shown in a configuration that includes a first filter 511A, the first mesh 511B, the second mesh 511C, the first air inlet 510 The first filter unit 511 further includes a first frame (unsigned) for supporting the first filter 511A, the first mesh 511B, and the second mesh 511C, but the first frame (unsigned) Of course, the first inlet (not shown) may be provided to be configured to be assembled.

The second air inlet 520 is provided at the second inlet (not shown) formed in the lower part of the front and rear doors 200 and 300, respectively, to purify the incoming air. The second air inlet 520 is the front door. The 2A air inlet 530 is provided at the 2A air inlet (not shown) formed in the lower portion of the see-through window 210 of the 200 and the lower part of the see-through window 210 of the rear door 300. The second B air inlet (not shown) is provided is configured to include a second B air inlet 540 for purifying the incoming air.

The second A air inlet 530 may include a second A filter unit 531 provided at a second A air inlet (not shown) formed under the see-through window 210 of the front door 200 to purify the air introduced therein. Can be.

The second A filter unit 531 includes a second A filter 531A for purifying air introduced into a second A air inlet (not shown) formed under the see-through window 210 of the front door 200, and the second A filter 531A. 2A fastening members 531C and 531D for mounting the second A suction grill 531B mounted on the front surface of the c) and the second A filter 531A between the second A filter 531A and the second A air inlet (not shown). It is configured to include).

The 2A fastening members 531C and 531D are easy to attach the 2A filter 531A to the 2A air inlet (not shown), and are easy to separate, respectively, on both sides of the top of the 2A air inlet (not shown). And a second A fastening rod 531D respectively formed on both upper and rear sides of the second A filter 531A so as to fit into the second A fastening groove 531C respectively formed.

That is, when the second A fastening rod 531D formed on the rear surface of the second A filter 531A is inserted into the second A fastening groove 531C, the second A filter 531A is fastened and the second A fastening groove 531C is closed. When the second A fastening rod 531D is separated, the second A filter 531A is separated.

Here, in order to prevent the 2A fastening rod 531D from being separated from the 2A fastening groove 531C, a band-shaped second A protrusion (unsigned) is formed on the outer circumferential surface of the second A fastening rod 531D in the circumferential direction. . That is, when the second A fastening rod 531D is inserted into the second A fastening groove 531C, the second A fastening groove 531C is engaged with the second A fastening groove 531C to prevent the second A filter 531A from being separated.

A second A support member 531E is provided below the second A air inlet (not shown) to prevent the second A filter 531A mounted on the second A air inlet (not shown) from being separated. That is, the second A support hooks 531E, which are bent in a lattice shape, are formed on both sides of the second A air inlet (not shown), and the lower side of the second A filter 531A is such a second A support hook 531E. It is latched on to support the second A filter 531A.

When the 2A suction grill 531B is removed from the front door 200 when the 2A filter 531A is disassembled, the 2A filter 531A mounted at the 2A air inlet (not shown) can be confirmed. The degree of contamination of the second A filter 531A can be visually checked, and the second A fastening groove 531C formed at the second A air inlet (not shown) is pulled out by pulling both sides of the upper end of the second A filter 531A by hand. The 2A fastening rod 531D formed at the back of the 2A filter 531A is disassembled while being pulled out. Then, when mounting, the lower end of the second A filter 531A is inserted into the second A support hook 531E, and the second A fastening rod 531D of the second A filter is inserted into the second A fastening groove (not shown) of the second A air inlet (not shown). 531C) to complete the installation.

In addition, the second B air inlet 540 is provided in the second B air inlet (not shown) formed at the lower portion of the viewing window 210 of the rear door 300 to filter the second B filter unit (not shown). It may include.

Here, since the configuration of the second B filter unit is the same as that of the second A filter unit 531, the description of the second A filter unit 531 is replaced with the description of the second B filter unit.

External cold air introduced through the first and second air inlets 510 and 520 is cooled in the enclosure case 100 and the front and rear doors 200 and 300 to cool the electric appliance 400 inside the enclosure case 100. A plurality of air discharge unit 600 is discharged to the outside as hot air is provided. That is, the plurality of air discharge units 600 may discharge the heat emitted from the various electric devices 400 to the outside of the electric device 400 to prevent the performance of the switchboard 10 from deteriorating.

The plurality of air discharge units 600 are provided on the first air discharge unit 610 provided at the center of the upper plate 110 of the enclosure case 100, and on the viewing window 210 of the front and rear doors 200 and 300. It is configured to include a second air outlet 620.

The first air discharge part 610 is provided in the center of the upper plate 110 of the enclosure case 100 and is a passage through which the hot air inside the enclosure case 100 is discharged to the outside to forcibly discharge the internal hot air to the outside. A first blowing fan 611 positioned at the first outlet 611A, and a first blowing fan cover 612 spaced apart from the first blowing fan 611 at an upper portion of the first blowing fan 611. It is composed.

The first blowing fan 611 is installed in the center of the upper plate 110 of the enclosure case 100 to forcibly discharge the hot air inside, the first blowing fan 611 is the first and second air inlet When the air introduced through the parts 510 and 520 is heated by hot air by the electric device 400, the hot air inside the enclosure case 100 may be smoothly discharged to the outside through the phenomenon of moving upward.

Although the first blower fan 611 is illustrated as being provided with only one center position of the upper plate 110 of the enclosure case 100, a plurality of first blower fans 611 are installed in the center of the upper plate of the enclosure case 100. Of course, the air circulation in the can be made more smoothly.

The first blower fan cover 612 has a first blower fan 611 to block rain or snow from flowing back into the enclosure case 100 through the first outlet 611A where the first blower fan 611 is located. It may be provided at the top of the).

The second air outlet 620 is provided on the sight window 210 of the front and rear doors 200 and 300 so that the hot air inside the enclosure case 100 is discharged to the outside to forcibly discharge the hot air to the outside. The second blower fan 621 positioned at the second outlet 621A, which is a passage, and the second blower fan cover 622 which is spaced apart from the second blower fan 621 at the side of the second blower fan 621. It is configured to include.

The second blower fan 621 is installed above the sight glass 210 of the front and rear doors 200 and 300 to forcibly discharge the internal hot air to the outside, and the second blower fan 621 is the first and second When the air introduced through the air inlets 510 and 520 is heated to the hot air by the electric device 400, the hot air inside the enclosure case 100 may be smoothly discharged to the outside through the phenomenon of moving upward.

The second blower fan cover 622 has a second blower fan 621 in order to block rain or snow from flowing back into the enclosure case 100 through the second outlet 621A where the second blower fan 621 is located. It may be provided on the side of.

Next, the operation of the first and second air inlets 510 and 520 and the first and second air outlets 610 and 620 in the switchboard 10 according to an embodiment of the present invention will be described.

First, when cold outside air flows from the first air inlet 510 discontinuously provided in the lower plate 120 of the enclosure case 100, the cold air is the electric device 400 inside the enclosure case 100. It cools and becomes hot air and moves upward by convection.

The hot air moving upwardly branches into the first air outlet 610 provided in the upper plate 110 of the enclosure case 100 and the second air outlet 620 provided in the front and rear doors 200 and 300. And is moved along the air circulation passage.

That is, the air introduced from the first air inlet 510 forms a continuous flow in the direction of the upper plate 110 of the enclosure case 100 along the first air outlet 610. And a second air circulation flow path 720 forming a continuous flow in a lateral direction of the enclosure case 100 in which the front and rear doors 200 and 300 are located along the second air outlet 620. 100 moves inside the enclosure case 100 from the inside.

At the same time, when external cold air flows in through the second air inlets 520 provided in the front and rear doors 200 and 300, the cold air cools and heats the electric device 400 inside the enclosure case 100. It becomes air and moves upward by convection.

The hot air moving upwardly branches into the first air outlet 610 provided in the upper plate 110 of the enclosure case 100 and the second air outlet 620 provided in the front and rear doors 200 and 300. Is moved.

That is, the air introduced from the second air inlet 520 forms a continuous flow in the direction of the upper plate 110 of the enclosure case 100 along the first air outlet 610. And the fourth air circulation flow path 740 forming a continuous flow in the lateral direction of the enclosure case 100 in which the front and rear doors 200 and 300 are located along the second air outlet 620. 100 moves inside the enclosure case 100 from the inside.

Accordingly, the switchboard 10 according to the embodiment of the present invention is provided on the lower plate 120, the front and the rear doors 200 and 300 of the enclosure case 100 to cool the electric appliance 400, respectively, and the outside cold air. A plurality of air inlets 500 for introducing into the inner space of the enclosure case 100, the upper plate 110 and the front and rear doors 200 and 300 of the enclosure case 100, respectively, the enclosure case 100 By having various air circulation passages 710 to 740 through a plurality of air discharge units 600 for discharging the internal hot air to the outside, an area in which an air trapping phenomenon occurs in the enclosure case 100 can be minimized. It becomes possible.

Therefore, the switchgear 10 according to an embodiment of the present invention improves the cooling efficiency of the switchgear 10 while simultaneously discharging high temperature heat generated from the electric device 400 to the outside, and at the same time, the internal electric device. To extend the life of the (400).

On the other hand, reference numeral 800 which is not described is an inclined roof for preventing rain water from flowing into the distribution panel during rainfall.

Another embodiment of the present invention will be described with reference to Fig. The same reference numerals are assigned to the same components as those of the above-described embodiment, and a description thereof will be omitted. 7 is a cross-sectional view showing a switchgear according to another embodiment of the present invention.

As shown in FIG. 7, the switchboard 10 ′ according to another embodiment of the present invention includes an enclosure case 100 having an upper plate 110, a lower plate 120, and both side plates 130, and an enclosure case. Front and rear doors 200 and 300 installed at both front and rear sides of the 100, the electrical device 400 provided in the inner space of the enclosure case 100, and the enclosure case to cool the electrical device 400. A plurality of air inlets 500 'are provided on the upper plate 110, the lower plate 120, and the front and rear doors 200 and 300 of the 100 to introduce external cool air into the inner space of the enclosure case 100. And a plurality of air outlets 600 provided on the upper plate 110 and the front and rear doors 200 and 300 of the enclosure case 100 for discharging the hot air to the outside of the enclosure case 100 to the outside. It is configured by.

The plurality of air inlets 500 ′ of the switchboard 10 according to another embodiment of the present invention may include a plurality of first air inlets 510 discontinuously provided on the lower plate 120 of the enclosure case 100. And a second air inlet 520 provided in the front and rear doors 200 and 300, and a third air inlet 550 provided below the edge of the upper case 110 of the enclosure case 100. Can be.

Therefore, the switchgear 10 ′ according to another embodiment of the present invention cools the switchgear 10 as it easily circulates with various air circulation flow paths and discharges high temperature heat generated from the electric device 400 to the outside. At the same time to improve the efficiency it is possible to extend the life of the internal electrical device (400).

As described above, the switchgear according to the embodiment of the present invention improves the cooling efficiency of the switchgear and at the same time extends the life of the switchboard by easily discharging the high temperature heat generated from the electric device inside the switchgear to the outside. It can be seen that the basic technical idea is to make it possible. Therefore, many modifications may be made by those skilled in the art without departing from the scope and spirit of the present invention.

10 ... switchboard 100 ... enclosure case
200 ... front door 300 ... rear door
400 ... electrical equipment 500 ... air inlet
600.Air exhaust

Claims

Enclosure case having an upper plate and a lower plate and both side plates; And,
Front and rear doors respectively installed at both front and rear sides of the enclosure case;
Electrical apparatus provided in the inner space of the enclosure case; And,
A plurality of air inlets provided in the lower plate and the front and rear doors of the enclosure case for cooling the electric device, for introducing external cool air into the interior space of the enclosure case;
A plurality of air outlets provided on the upper plate and the front and rear doors of the enclosure case to form a plurality of air circulation passages between the plurality of air inlets for discharging the hot air inside the enclosure case to the outside; ;
Wherein the switchgear comprises a switchgear.

The method of claim 1,
The plurality of air inlet,
A first air inlet provided in a plurality of discontinuously on the lower plate of the enclosure case;
And a second air inlet provided at a lower portion of the see-through window of the front and rear doors, respectively.

3. The method of claim 2,
The plurality of air outlets,
A first air discharge part provided at an upper center of the enclosure case and forming a first A air circulation path and a first B air circulation path between the first air inlet and the second air inlet;
And a second air discharge part provided at upper portions of the viewing windows of the front and rear doors, respectively, to form a second air circulation passage and a second air circulation passage between the first air inlet and the second air inlet. Switchgear, characterized in that.

3. The method of claim 2,
The first air inlet,
And a first filter unit including a first mesh filter provided at a plurality of first inlets formed at predetermined intervals along a lower periphery of the enclosure case to purify the external cold air. .

3. The method of claim 2,
The second air inlet,
And a second filter unit provided at a second inlet formed at a lower portion of the sight window of the front and rear doors to purify the outside cold air.

The method of claim 3,
The first air discharge unit,
A first blowing fan provided at a center of the upper plate of the enclosure case and positioned at a first outlet, which is a passage through which hot air inside the enclosure case is discharged to the outside; and the first blowing fan at an upper portion of the first blowing fan; Includes; the first blowing fan cover spaced apart;
The second air outlet,
A second blowing fan provided at upper portions of the sight windows of the front and rear doors and positioned at a second discharge port, which is a passage through which hot air inside the enclosure case is discharged to the outside; and a second blowing fan at a side of the second blowing fan. And a second blowing fan cover spaced apart from each other.

5. The method of claim 4,
The first mesh filter,
A first filter installed at the first inlet to purify external cold air;
A first mesh installed on an inner surface of the first filter;
And a second mesh installed on the other side of the first filter.

6. The method of claim 5,
The second filter unit,
A second filter for purifying the air flowing into the second inlet formed at the lower portion of the sight window of the front and rear doors, respectively;
A second suction grill mounted on the front surface of the second filter;
And a second fastening member for mounting the second filter between the second filter and the second inlet.

9. The method of claim 8,
The second fastening member is,
Second fastening grooves respectively formed at both sides of an upper end of the second inlet to mount the second filter to the second inlet;
And a second fastening rod formed on both sides of the upper rear side of the second filter so as to be fitted into the second fastening groove.

The method of claim 1,
The plurality of air inlet,
The switchgear further comprises a third air inlet provided on the lower edge of the upper plate of the enclosure case.

An enclosure case having an upper plate and a lower plate and both side plates;
Front and rear doors respectively installed at both front and rear sides of the enclosure case;
An electric device provided in an inner space of the enclosure case;
A plurality of air inlets provided at the upper plate, the lower plate, the front and the rear door of the enclosure case to introduce external cool air into the inner space of the enclosure case;
A plurality of air outlets are provided on the upper plate and the front and rear doors of the enclosure case, respectively, for discharging heat emitted from the electric machine to the outside of the enclosure case.
Switchgear comprising a.

12. The method of claim 11,
The plurality of air inlet,
A first air inlet provided in a plurality of discontinuously on the lower plate of the enclosure case;
A second air inlet provided at a lower portion of the viewing window of the front and rear doors;
It includes a third air inlet provided on the upper plate of the enclosure case,
The plurality of air outlets,
A first air inflow passage, a first air circulation passage, and a first air circulation passage formed between the first air inlet portion, the second air inlet portion, and the third air inlet portion; 1 air outlet,
A second air circulation passage, a second air circulation passage, and a second air circulation passage between the first air inlet, the second air inlet, and the third air inlet, respectively; Distributing panel comprising a second air outlet to form.