WO2013099393A1

WO2013099393A1 - Electrical room

Info

Publication number: WO2013099393A1
Application number: PCT/JP2012/076068
Authority: WO
Inventors: 進小鶴; 崇士 ▲黒▼田; 堀之内　克彦
Original assignee: 三菱電機株式会社
Priority date: 2011-12-27
Filing date: 2012-10-09
Publication date: 2013-07-04
Also published as: KR101702196B1; JP5837093B2; KR20140092918A; JPWO2013099393A1

Abstract

An electrical room houses, for example, a switch gear (1) as electrical equipment, and has a maintenance space (10) for maintenance check on the front side of the switch gear (1). The electrical room has a space (11) for heat dissipation and pressure discharge above the switch gear (1), which acts as an air channel for the air warmed as a result of the heat generated by the switch gear (1) and the high-temperature and high-pressure gas generated upon an internal short-circuit in the switch gear (1). The maintenance space (10) and the space (11) for heat dissipation and pressure discharge are separated by a separator (12). There is also an electrical room exhaust outlet (15) that opens from the space (11) for heat dissipation and pressure discharge to the outside of an electrical room housing (8). The electrical room exhaust outlet (15) includes a vent outlet that always communicates with the outside, and an electrical room pressure discharge board (16) that opens with the pressure from the generation of a high-temperature and high-pressure gas.

Description

power room

The present invention relates to an electrical room that houses electrical equipment such as a metal closed switchgear, for example, and more particularly to a heat dissipation and pressure release structure of the electrical room.

2. Description of the Related Art A package type electric room in which electric equipment such as a switchgear is housed in a partitioned room is conventionally known.
Since the electrical equipment accommodated in the electrical room generates heat during use, it is necessary to release the heat to the outside. As a conventional cooling structure that cools electrical equipment configured by arranging a plurality of switchboards in a row, for example, a housing is interposed between a pair of switchboards, and each of the paired switchboards is connected to the casing A port is provided in the lower part of the casing and an exhaust port is provided in the upper part of the casing. The casing is partitioned by a partition into an intake chamber having an intake port and an exhaust chamber having an exhaust port. And a structure in which an exhaust duct is connected to the ceiling of the exhaust chamber is disclosed (see Patent Document 1).

Japanese Utility Model Publication No. 62-132609 (first page, FIG. 1)

When the intake / exhaust structure using a duct as shown in Patent Document 1 is applied to a package-type electric room, in addition to the manufacturing cost of the duct, it is necessary to take measures against intrusion of rainwater from the opening of the duct terminal. There was a problem that the cost of the entire facility was increased, such as an increase in construction costs.
In addition, in electrical equipment such as switch gears, it is necessary to take measures against pressure increase in the event of an internal short circuit accident. Usually, a pressure relief plate is provided on the ceiling of a case that houses electrical equipment such as switch gears. If this pressure relief measure is to be applied to a packaged electrical room, a pressure relief duct that leads from the ceiling of the electrical equipment case to the outside of the electrical room is provided, and a pressure relief plate is provided on the outlet side of the pressure release duct. Measures such as these are necessary. In this case, since the pressure in the pressure release duct alone cannot ventilate during normal operation, the temperature of the electric room rises. Therefore, a structure having an intake / exhaust structure as in Patent Document 1 or a cooling device such as an air conditioner is used. It is necessary to cool the room. If the duct structure is adopted, there is a problem that the cost is increased as described above. When the whole electric room is cooled by the cooling device, a cooling device having an appropriate cooling capacity is required, and the failure of the cooling device, etc. As a result, the temperature of the electric chamber may increase.

The present invention has been made in order to solve the above-described problems. In a package-type electric chamber, the heat exhaust generated in the electrical equipment to be accommodated and the pressure relief when an internal accident occurs are simply configured. It is an object to provide an electric room that can be performed in the office.

An electrical room according to the present invention is an electrical room in which electrical equipment is housed in an electrical room housing, and has a maintenance space for maintenance and inspection on the front side of the electrical equipment, from the electrical equipment above the electrical equipment. There is a heat release / release space that serves as an air flow path for high-temperature and high-pressure gas generated in the event of an internal short circuit in the air and electrical equipment heated by the generated heat, and the maintenance space and the heat release / release space are partitioned by a partition plate. An electrical room exhaust opening that opens from the heat radiation / pressure release space to the outside of the electrical room housing is provided, and the electrical room exhaust opening always has a ventilation opening that communicates with the outside, and when high temperature / high pressure gas is generated. An electric chamber release plate opened by pressure is provided.

According to the electric chamber of the present invention, the maintenance space and the heat radiation / pressure release space are partitioned by the partition plate, and the electric chamber exhaust opening that opens from the heat radiation / pressure release space to the outside of the electric chamber housing is provided. The exhaust port is equipped with a ventilation port that is always in communication with the outside and an electric chamber pressure release plate that is opened by high pressure when high-temperature and high-pressure gas is generated. By designing the ventilation so as to dissipate heat generated from the electrical equipment by ventilation, the electrical equipment can be normally operated without providing a cooling device and a ventilation device. Moreover, the temperature rise of a maintenance space can be suppressed. When a cooling device is provided in the electric chamber, the cooling capacity can be suppressed.
In addition, the pressure relief structure of the electric room can be constructed at low cost, and it becomes easy to ensure the safety of workers by discharging high temperature / high pressure gas to the outside of the electric room in the event of an internal short circuit of the electric equipment.

1 is a side sectional view of an electric chamber according to Embodiment 1 of the present invention. It is a perspective view of the electric chamber of FIG. It is side surface sectional drawing of the electric chamber by Embodiment 2 of this invention. It is a perspective view of the electric chamber of FIG. It is side surface sectional drawing of the electric chamber by Embodiment 3 of this invention. It is a perspective view of the electric chamber of FIG. It is the perspective view which expanded the ceiling opening part and pressure-release plate of the electric chamber of FIG.

Embodiment 1 FIG.
1 is a side sectional view of an electric chamber according to Embodiment 1 of the present invention, and FIG. 2 is a perspective view showing an appearance of the electric chamber of FIG.
The electric chamber of the present invention is a package type electric chamber in which a plurality of electric facilities are arranged in the interior of the electric chamber casing, and a maintenance space for maintenance and inspection is provided on the front side of the electric facilities. As an example of the electrical equipment, a description will be given below with switch gears arranged in a row.

First, the configuration of the switch gear will be described. The switch gear 1 includes a circuit breaker chamber 2 in which a drawer type circuit breaker is accommodated, a main bus chamber 3 in which a bus connected to one end of the circuit breaker is accommodated, It is divided into a cable chamber 4 in which a cable connected to the other end side is accommodated, and a controller room 5 in which a control device is accommodated.
The switch gear 1 has a front side on the left side when viewed in the direction of FIG. 1, an open / close door is provided, and instruments and operation units are arranged.

On the ceiling side of the circuit breaker room 2, main bus room 3, and cable room 4 is attached a pressure release plate 6 for releasing high temperature and high pressure gas to the outside of the switchgear 1 by opening it in the event of an internal short circuit accident or the like. It has been. The pressure release plate 6 shown by a broken line in FIG. 1 shows a state opened due to an internal short circuit accident or the like, but is closed in the horizontal direction during normal operation.
The pressure release plate 6 is provided with a ventilation port (not shown) so that heat generated from the inside of the switch gear 1 during normal operation can be released to the outside. The ventilation port is composed of a plurality of small holes or slits, for example, and a filter may be provided in the ventilation port.
In addition, an intake port 7 is provided in the lower part on the back side of the switch gear case 1a.

As shown in FIG. 2, the electrical chamber housing 8 that houses the switchgear 1 has a rectangular parallelepiped container shape, and is made of, for example, steel or aluminum.
As shown in FIG. 1, a plurality of switch gears 1 are arranged in a row in the longitudinal direction of the electric chamber casing 8 on one side surface in the short direction inside the electric chamber casing 8. The space on the other side in the hand direction, that is, the space on the front surface side of the switch gear 1 is a maintenance space 10 for the operator 9 to perform maintenance and inspection of the electrical equipment. Note that the back side of the switch gear 1 is disposed close to the wall surface of the electric chamber casing 8.

The space above the switchgear 1 arranged in the row is a heat radiation / pressure release space 11 that becomes a ventilation path for air warmed in the switchgear 1 and high-temperature / high-pressure gas released in the event of an internal accident.
Here, a partition plate 12 for partitioning the maintenance space 10 and the heat radiating / pressure releasing space 11 is provided between the upper part on the front side of the switch gear 1 and the ceiling portion of the electric chamber casing 8.

Further, an electrical chamber intake port 13 is provided on the wall surface of the electrical chamber housing 8 on the back side of the switch gear 1 at a position facing the intake port 7 of the switch gear 1 on the lower side.
For example, a louver 13a is provided on the outside of the electric chamber inlet 13 so that rainwater or the like from the outside does not enter. A shutter 14 that is closed by the gas pressure from the switch gear 1 side is provided on the inner side.
An electric chamber for discharging warmed air in the heat radiation / pressure release space 11 to the outside of the electric chamber casing 8 is provided on the upper side of the side surface of the electric chamber casing 8 provided with the electric chamber intake port 13. An exhaust port 15 is provided, and the electric chamber exhaust port 15 is provided with an electric chamber pressure release plate 16 for discharging high-temperature and high-pressure gas generated due to an internal short circuit accident of the switchgear 1 or the like. Since the electric chamber pressure release plate 16 is closed during normal operation, a ventilation port (not shown) for exhaust heat and ventilation during normal operation is provided in the electric chamber pressure release plate 16. This ventilation port is composed of, for example, a plurality of small holes or slits. Further, a filter may be provided at the ventilation port. Furthermore, measures are taken to prevent rainwater from entering the ventilation openings. The ventilation port is not necessarily provided in the electric chamber pressure release plate 16, and may be provided in the electric chamber exhaust port 15 separately from the electric chamber pressure release plate 16.

Next, the operation of the electric chamber configured as described above will be described.
During normal operation, the internal equipment of the switchgear 1 generates heat when energized, so outside air is taken in through the electric chamber inlet 13 at the lower part of the electric chamber casing 8 and the inlet 7 of the switchgear 1. The air heated by absorbing the heat generated from the switch gear 1 along the path shown is discharged from the ventilation port of the pressure release plate 6 provided on the ceiling of the switch gear housing 1a to the heat radiating / pressure releasing space 11. During normal operation, the electric chamber pressure release plate 16 provided in the electric chamber exhaust port 15 is closed, so that the warmed air passes through the ventilation port formed in the electric chamber pressure release plate 16 from the heat radiation / pressure release space 11. It is discharged outside.

If a short circuit accident or the like occurs inside the switchgear 1, high temperature and high pressure gas is instantaneously generated. Due to the pressure increase caused by the high temperature / high pressure gas, the lower electric chamber inlet 13 is closed by rotating the shutter 14 in the direction of the arrow, and the pressure relief plate 6 on the ceiling side of the switchgear 1 is indicated by a broken line in FIG. As shown, the high-temperature / high-pressure gas is discharged to the heat radiation / pressure-release space 11, and the electric chamber pressure-release plate 16 is opened. It is discharged to the outside as indicated by the dotted line. As described above, the back side of the switch gear 1 is arranged close to one side wall of the electrical chamber casing 8, and the intake port and the exhaust port are provided on the side wall side. Intake and exhaust can be done easily.
In the perspective view of FIG. 2, the electric chamber pressure release plate 16 on the right side shows the open state due to a short circuit accident or the like, and the other two electric chamber pressure release plates 16 show the state during normal operation. Yes.

In the present invention, since the partition plate 12 that partitions the heat radiation / pressure release space 11 and the maintenance space 10 is provided, the air warmed inside the switch gear 1 does not enter the maintenance space 10 during normal operation. During normal operation, it is ventilated through the ventilation opening. By designing the ventilation so as to dissipate the heat generated from the electrical equipment by natural convection, normal operation of the electrical equipment can be performed without providing a cooling device or ventilation equipment. It becomes possible. Moreover, the temperature rise of a maintenance space can be suppressed. When a cooling device is provided in the electric chamber, the cooling capacity can be suppressed.
Further, when a short-circuit accident or the like occurs, the partition plate 12 is provided, so that high-temperature / high-pressure gas is not released into the maintenance space 10 and it is easy to ensure the safety of the worker 9.

Note that the internal configuration of the electric room shown in FIG. 1 is an example, and is not limited to the arrangement shown in the figure. Further, the switch gear 1 may be different from the configuration of FIG. Furthermore, the electrical equipment is not limited to a switch gear, and for example, a control gear or a transformer may be accommodated. These points are the same in the electric chambers of the following embodiments.

As described above, according to the electric chamber of the first embodiment, an electric facility is housed in an electric chamber casing, and has a maintenance space for maintenance and inspection on the front side of the electric facility. Above the equipment, there is a heat release / release space that serves as a ventilation path for air heated by the heat generated by the electrical equipment and high-temperature / high-pressure gas generated in the event of an internal short circuit in the electrical equipment. The pressure space is partitioned by a partition plate, and an electrical room exhaust opening that opens from the heat dissipation / pressure release space to the outside of the electrical room casing is provided.・ Equipped with an electric chamber release plate that opens due to high pressure when high-pressure gas is generated, so it is ventilated through a ventilation opening during normal operation, so ventilation is performed to dissipate the heat generated by the electrical equipment by natural convection ventilation. By performing the meter, cooling device, it is possible to normal operation of the electrical equipment without providing the ventilation system. Moreover, the temperature rise of a maintenance space can be suppressed. When a cooling device is provided in the electric chamber, the cooling capacity can be suppressed.
In addition, the pressure relief structure of the electric room can be constructed at low cost, and it becomes easy to ensure the safety of workers by discharging high temperature / high pressure gas to the outside of the electric room in the event of an internal short circuit of the electric equipment.

The electric chamber casing is a rectangular parallelepiped, and a plurality of electric facilities are arranged in the longitudinal direction inside the electric chamber casing, and are arranged close to one side surface in the short side direction. Therefore, a compact electric chamber having the above effects can be provided at low cost.

Embodiment 2. FIG.
FIG. 3 is a side sectional view of the electric chamber according to the second embodiment. The same parts as those in FIG. 1 of the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. Hereinafter, differences will be mainly described. FIG. 4 is a partial perspective view showing the appearance of the electric chamber of FIG. The difference from the first embodiment is the structure of the electric chamber exhaust port.

As shown in FIG. 3, the electric room exhaust port 15 is provided with a bowl-shaped ceiling 17 serving as a bowl for preventing rainwater from entering. An electric chamber pressure release plate 18 is provided on the lower surface side of the bowl-shaped ceiling 17. As in the case of the first embodiment, the electrical chamber pressure release plate 18 is formed with a vent for heat dissipation during normal operation, and is closed in the horizontal direction during normal operation.
Here, a filter or the like may be attached to the electric chamber exhaust port 15 to take measures to prevent entry of small animals or dust.

During normal operation, a path as shown by a dotted line in FIG. 3 is followed, and outside air is taken in from the electric chamber intake port 13 through the intake port 7 of the switchgear 1 and provided in the electric chamber pressure release plate 18 of the electric chamber exhaust port 15. It is discharged from the vent and ventilated.
When a short circuit accident or the like occurs inside the switchgear 1, the pressure release plate 6 and the electric chamber pressure release plate 18 of the switchgear 1 are opened by the gas pressure, and the high temperature / high pressure gas is released to the outside of the electric chamber.
In the perspective view of FIG. 4, the left electric chamber pressure release plate 18 shows an opened state, and the right electric chamber exhaust port 15 shows a closed state during normal operation.

As described above, according to the electric chamber of the second embodiment, the electric chamber exhaust port is formed on the side surface of the electric chamber casing, and the haze for preventing rainwater from entering the outside of the electric chamber exhaust port. Since it is provided, in addition to the effects of the first embodiment, it is possible to reliably prevent rainwater from entering the electric chamber exhaust port.

Embodiment 3 FIG.
FIG. 5 is a side sectional view of the electric chamber according to the third embodiment. The same parts as those in FIG. 1 of the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. Hereinafter, differences will be mainly described. FIG. 6 is a partial perspective view showing the appearance of the electric chamber of FIG. FIG. 7 is a perspective view showing a cylindrical portion and a pressure relief plate constituting the electric chamber exhaust port of FIG. The difference from the first embodiment is the structure of the electric chamber exhaust port.

The electrical chamber exhaust port 19 of the present embodiment is provided in the ceiling portion of the electrical chamber casing 8 located above the switch gear 1. The electrical chamber exhaust port 19 includes a cylindrical portion 20 that protrudes upward from the ceiling portion in a chimney shape and opens upward, and an electrical chamber pressure release plate 21 is provided so as to close the opening from the upper surface. The electric chamber pressure release plate 21 is connected to the outer surface of the ceiling of the electric chamber casing 8 by a connecting member 22 and locked. For example, the connecting member 22 may be a stretchable string or a spring or a chain. Moreover, you may make it a hinge structure.

The cylindrical part 20 and the electric chamber pressure release plate 21 will be described in more detail with reference to the component diagram of FIG.
The cylindrical part 20 has a flange 20a whose upper surface is opened outward in the horizontal direction, and a ventilation port 20b is formed on the upper side of the side surface. Although the ventilation opening 20b is made into the some slit in the figure, you may comprise by a some round hole, for example.
The electric chamber pressure release plate 21 has a rain guard 21a formed by bending the periphery vertically downward. The rain shield 21a serves to prevent rainwater from entering the electrical room from the opening of the tubular part 20 and the ventilation opening 20b, and the electrical room pressure release plate 21 is opened by a strong wind when it receives a strong crosswind. Is preventing.

Next, the operation of the electric chamber exhaust port 19 of the present embodiment will be described.
During normal operation, the air heated by the heat generated by the electrical equipment inside the switchgear 1 is routed from the ventilation port 20b of the tubular portion 20 of the electrical chamber exhaust port 19 through the path shown by the dotted line in FIG. It is discharged outside.
When an internal short circuit accident occurs, the electric chamber pressure release plate 21 is opened upward by the gas pressure, and high-temperature and high-pressure gas is generated from the gap formed between the upper surface of the flange 20a of the cylindrical portion 20 and the lower surface of the electric chamber pressure release plate 21. Released outside the electrical room. At this time, since the electric chamber pressure release plate 21 is fixed to the ceiling portion of the electric chamber casing 8 by the connecting member 22, it does not scatter.
In the perspective view of FIG. 6, the electric chamber exhaust port 19 on the left side shows a state in which the electric chamber pressure release plate 21 is closed during normal operation, and the electric chamber pressure release plate 21 is opened on the right side when an internal short circuit accident occurs. Shows the state.

As described above, according to the electric chamber of the third embodiment, the electric chamber exhaust port is formed on the ceiling surface of the electric chamber casing, and has a cylindrical portion that protrudes and opens upward from the ceiling surface. A ventilation opening is provided in the upper part of the side of the cylindrical part, and an electric room pressure relief plate with a rain guard is covered on the outer periphery so as to close the opening from above the cylindrical part. Since the electric chamber pressure release plate was opened by this, high-temperature and high-pressure gas was released to the outside, so when the high-temperature and high-pressure gas was released outside the electric chamber, it was discharged upward. As compared with

Embodiments

1 and 2, the effect of the released high-temperature and high-pressure gas on the person around the electric room can be suppressed, and safety is improved.

In addition, since the electric chamber pressure release plate is coupled to the outside of the ceiling of the electric chamber casing by the connecting member, and is locked by the connecting member when the electric chamber pressure release plate is opened, the above effect is achieved. In addition, it is possible to prevent the electric chamber release plate from being opened and scattered at the time of an internal short circuit accident.

DESCRIPTION OF SYMBOLS 1 Switchgear (electric equipment) 1a Switchgear case 2 Circuit breaker room 3 Main bus room 4 Cable room 5 Controller room 6 Pressure release plate 7 Air inlet 8 Electric room housing 9 Worker 10 Maintenance space 11 Heat radiation / pressure release space 12 Partition Plate 13 Electric room intake port 13a Louver 14

Shutter

15, 19 Electric

room exhaust port

16, 18, 21 Electric chamber pressure release plate 17 Cascade-shaped ceiling 20 Tubular part 20a Flange

20b Ventilation port

21a Rain cover 22 Connecting member.

Claims

An electrical room is housed in an electrical room housing, and has a maintenance space for maintenance on the front side of the electrical equipment,
Above the electrical equipment, there is a heat release and pressure release space that serves as a ventilation path for air heated by heat generated from the electrical equipment and a high-temperature / high-pressure gas generated in the event of an internal short circuit of the electrical equipment,
The maintenance space and the heat radiation / pressure release space are partitioned by a partition plate,
An electrical chamber exhaust opening that opens from the heat radiation / pressure release space to the outside of the electrical chamber housing is provided,
An electrical chamber characterized in that the electrical chamber exhaust port is provided with a ventilation port that is always in communication with the outside and an electrical chamber pressure release plate that is opened by pressure when the high-temperature and high-pressure gas is generated.
The electric room according to claim 1,
The electric chamber casing is a rectangular parallelepiped, and a plurality of the electric facilities are arranged in the longitudinal direction inside the electric chamber casing and arranged close to one side surface in the short direction. An electric room characterized by being.
In the electric room according to claim 1 or 2,
The electrical chamber exhaust port is formed on a side surface of the electrical chamber casing, and an electric chamber is provided on the outside of the electrical chamber exhaust port to prevent rainwater from entering.
In the electric room according to claim 1 or 2,
The electrical chamber exhaust port is formed on the ceiling surface of the electrical chamber housing, has a cylindrical portion that projects upward and outward from the ceiling surface, and a ventilation port is provided on the upper side of the cylindrical portion, An electric room pressure relief plate having a rain shield on the outer periphery is covered so as to close the opening from above the cylindrical portion, and at the time of an internal short circuit accident, the electric room pressure relief plate is opened by the generated high temperature / high pressure gas. An electric chamber characterized in that the high-temperature and high-pressure gas is discharged to the outside.
The electric room according to claim 4,
The electric chamber pressure release plate is coupled to the outside of the ceiling of the electric chamber casing by a connecting member, and is locked by the connecting member when the electric chamber pressure release plate is opened. And the electrical room.