JPH11283844A - Cooling apparatus for indoor transformer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling apparatus for indoor transformer which is able to cool a transformer, without raising the temperature in an electric room. SOLUTION: A transformer housing box 20, which houses a transformer 13 and a cooling box 21 having a heating chamber C1 and a cooling chamber C2 inside, are arranged in an electric room 11. A heat pipe 25 is housed in the cooling box 21 and the heating section 25a1 , and heat radiating section 25a2 of the pipe 25 are respectively positioned in the heating chamber C1 and cooling chamber C2 of the cooling box 21. The transformer 13 is cooled by discharging the heat of the transformer 13 through forcible ventilation into the heat pipe 25 and cooling chamber C2 , by providing an air circulating apparatus which forcibly generates an air flow through an air flow passage which reaches the lower space of the transformer housing box 20 from the upper space of the box 20 through the heating chamber C1 and a forcible ventilator which ventilates the cooling chamber C2 .

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for an indoor transformer for cooling a transformer installed in an electric room provided inside a building such as a building or an apartment.

[0002]

2. Description of the Related Art Transformers installed in power receiving and distribution facilities generate heat (iron loss and copper loss) in accordance with load power and generate heat.
Its temperature rises. The transformer is cooled by radiating heat through the surrounding air, but when the transformer is installed in an electric room provided indoors, the temperature of the air in the room rises due to heat radiation from the transformer. As a result, the difference between the temperature of the air around the transformer and the temperature of the transformer becomes smaller, so that it may not be possible to cool the transformer to a sufficiently low temperature.

[0003] If the transformer cannot be cooled, not only its performance cannot be fully exhibited, but also the deterioration of the insulator used in the transformer may be accelerated, and the life of the transformer may be shortened. . In addition, when the temperature in the electric room rises due to the heat radiation from the transformer, there is a problem that the working environment of the worker at the time of maintenance and inspection is deteriorated. Further, when the temperature in the electric room rises, malfunctions occur in the attached devices near the transformer, and not only can the performance of the attached devices not be sufficiently exhibited, but also the cause of shortening the service life thereof. There is also the problem of becoming. Therefore, when a transformer is installed in an indoor electric room, outdoor air is taken into the electric room to promote heat radiation from the transformer and to suppress a rise in temperature in the electric room.

FIG. 3 schematically shows a configuration example of a power receiving and distribution facility in an electric room provided inside a building such as an office building or a condominium. In FIG.
Is the door of the electric room. In this example, two transformers 3, 3 'are installed substantially at the center of the electric room, and low-voltage boards 4, 4' are arranged on the sides of the transformers 3, 3 ', respectively. In addition, a power receiving panel 5 is disposed near the transformer 3 installed at a position distant from the entrance of the electric room 1 in a state opposite to the low voltage panel 4, and a corner of the electric room near the power receiving panel 5 is provided. A fire extinguisher 6 that can be inspected and operated from outside the electric room is disposed in the section.

[0005] Among the corners of the electric room 1, an air supply ventilation device 7 is disposed in a corner portion opposite to the fire extinguishing equipment 6 with the door 2 interposed therebetween, and the air supply ventilation device 7 is disposed. An exhaust ventilation device 8 is disposed at another corner diagonally opposite the corner thus set.

In this power receiving and distributing facility, the air in the electric room whose temperature has been increased by the heat generated from the transformers 3 and 3 'is exhausted through the exhaust ventilator 8, and the outside air is supplied from the air supply ventilator 7 into the electric room. To suppress the rise in temperature in the electric room. Thus, when cooling the transformer by ventilating the electric room,
In order to keep the temperature in the electric room low, it is necessary to increase the difference between the room temperature and the supply air temperature, or to increase the amount of ventilation provided by the air supply ventilation device and the exhaust ventilation device.

[0007]

In a power receiving / distributing facility installed indoors in a building or the like, a device such as a switchboard is installed in the vicinity of the transformer, so that the upper limit of the temperature in the electrical room is set to three.
It is necessary to suppress the temperature to about 5 to 40 ° C. In a season where the outside air temperature is low, it is easy to keep the temperature in the electric room within the above range without increasing the ventilation volume so much. However,
In summer, when the difference between the temperature in the electric room and the supply air temperature decreases due to the rise in outside air temperature, it is necessary to increase the ventilation in order to keep the temperature in the electric room within the above range,
In order to maintain the upper limit of the temperature in the electric room throughout the year in the above range, it is necessary to use large air supply ventilators 7 and exhaust ventilators 8 having a large air flow.

When a transformer is installed in a room,
Excitation sound generated from the transformer is reflected in the room and its sound pressure rises, and the amount of noise leaking outside through the ventilation system for air supply and exhaust increases. Therefore, when there is noise regulation around the electric room, it is necessary to take noise suppression measures for the air supply ventilation device 7 and the exhaust ventilation device 8 in order to suppress noise leakage. Also, if the ventilation volume of the ventilation device is increased, the noise generated by the ventilation fan increases, so that the air supply ventilation device 7 and the exhaust ventilation device 8 are also provided with soundproofing measures against the noise generated by the blower. Need to be kept.

Therefore, when the transformer is cooled by ventilating the electric room, the air supply ventilation device 7 and the exhaust ventilation device 8 become very large and uneconomical devices. There was a problem that the cost of the power distribution equipment was increased. Further, as the size of the air supply ventilation device 7 and the exhaust ventilation device 8 increases, the space occupied by them in the electric room increases, so that it is necessary to secure an electric room having a large area, which is uneconomical. there were.

An object of the present invention is to provide a cooling device for an indoor transformer that can efficiently cool the transformer without using a large-sized ventilation device.

Another object of the present invention is to provide a cooling device for an indoor transformer capable of efficiently cooling a transformer without leaking a loud noise to the outside.

[0012]

SUMMARY OF THE INVENTION The present invention is a cooling device for an indoor installed transformer for cooling a transformer installed in an electric room provided inside a building. In the present invention, the transformer is arranged. A transformer storage box disposed in an electric room having a transformer storage space therein, a cooling room having an internal space independent of the transformer storage space, and heat generated by air above the transformer storage space. A heat pipe is provided for transporting into the cooling chamber and transmitting the air to the cooling chamber, and a forced ventilation device for forcibly replacing the air in the cooling chamber with air outside the electric chamber.

[0013] "Forcibly replacing the air in the cooling room with the air outside the electric room" means that the air in the cooling room is forced out of the outdoor room using a means for forcibly generating an air flow by a blower or the like. Means forced replacement.

The heat pipe is a known heat pipe in which a working fluid such as water or ammonia is sealed in a highly heat-conductive pipe-like container provided with a lining (called a wick) made of a wire mesh or the like that causes a capillary phenomenon. It is. In a heat pipe, one end of a container is usually used as a heating section (also called a heat absorbing section or an evaporating section), and the other end is used as a heat radiating section (also called a condensing section or a cooling section). When the heating section of the heat pipe is heated, the working fluid in the container absorbs heat and evaporates. The vapor of the hydraulic fluid moves to the heat radiating section, radiates heat and condenses. The condensed working fluid moves in the wick by capillary action and returns to the heating section. This cycle of evaporation and condensation is repeated, and the heat of the heating section is efficiently transported to the heat radiating section.

In the power receiving and distribution equipment provided with the cooling device, when heat is generated from the transformer, the temperature of the air in the transformer storage space increases. The air in the transformer storage space, which has become lighter due to the rise in temperature, moves to the upper part of the transformer storage space.
The heat of the air above the transformer storage space is transported into the cooling chamber through the heat pipe. As a result, the temperature of the air above the transformer storage space decreases, and moves to the lower portion of the transformer storage space. In this way, convection of air is constantly generated in the transformer storage space, and heat exchange is performed between the transformer and the surrounding air, thereby cooling the transformer. The heat transported into the cooling room by the heat pipe raises the temperature of the air in the cooling room, but the air in the cooling room is replaced by the outdoor air by the ventilation device, so that the heat does not stay in the cooling room. The heat transferred from the heat pipe into the cooling room is discharged to the outside of the room without delay through the ventilation device.

As described above, according to the present invention, the heat generated from the transformer is continuously transported to the outside of the electric room through the heat pipe having high heat transfer efficiency and the ventilation device.
The transformer can be efficiently cooled without increasing the temperature of the air in the electric room.

According to the present invention, not only can the transformer be cooled without raising the temperature in the electric room, but also the noise generated by the transformer can be cut off from the outside by the transformer storage box, and the transformer can be cooled. Since the noise can be prevented from leaking to the outside of the electric room, it is not necessary to provide a large air supply ventilator and a ventilator for exhaust having silence means in order to ventilate the electric room.

Further, with the above configuration, the cooling of the transformer can be forcibly performed. Therefore, when it is necessary to perform the overload operation of the transformer, the temperature of the insulator of the transformer can be reduced. Can be prevented from rising excessively.

Although the present invention does not hinder the provision of a ventilator for ventilating the electric room, the ventilator in the electric room does not need to consider cooling the transformer. It is only necessary to have a minimum amount of air to replace the air, and no noise reduction measures are required.

In a preferred aspect of the present invention, a transformer storage box having a transformer storage space in which a transformer is disposed therein and disposed in an electric room, and a transformer storage box disposed in the electric room together with the transformer storage box. A cooling box whose interior is partitioned into a cooling chamber located at the upper part and a heating chamber located at the lower part, and a heating part is located in the heating chamber, and a heat radiating part is placed in the cooling box in a state where the heat radiation part is located in the cooling chamber Heat pipe, an air circulation device that forcibly generates an air flow through an air flow path from the upper part of the transformer storage space to the lower part of the transformer storage space through the heating chamber of the cooling box, A forced ventilation device is provided for forcibly replacing the air outside the room.

The cooling box need only be large enough to accommodate the heat pipe, so it does not need to be so large, and the provision of the cooling box increases the installation area of the power receiving and distribution equipment. Is slight.

When a plurality of transformers are installed in the same electric room, a cooling box may be provided for each transformer. One cooling box is provided for a plurality of transformers and the cooling box is provided. May be shared by a plurality of transformers.

It is preferable that the transformer storage box has a hermetically sealed structure that does not have a portion that opens to the space in the electric room.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a plan view showing a cross section of an electric room of a power receiving and distribution facility provided with a transformer to which a cooling device according to the present invention is applied, and showing an example of arrangement of devices inside the electric room. FIG. 2 is a sectional view taken along line AA of FIG.

1 and 2, reference numeral 11 denotes an electric room having a door 12, 13 and 13 'are transformers arranged substantially at the center of the electric room, and 14 and 14' are sides of the transformers 13 and 13 '. A low-voltage board 15 is disposed on the opposite side of the low-pressure board 14 with the transformer 13 interposed therebetween, and a power receiving board 16 is a fire-extinguishing facility.

In the present invention, transformer storage boxes 20, 20 'each having a transformer storage space S therein are provided in the electric room 11, and the transformer storage spaces in these storage boxes are respectively provided with transformers 13 and 13. , 13 'are arranged. The transformer storage boxes 20 and 20 ′ are provided for the purpose of blocking heat generated by the transformers 13 and 13 ′ and excitation noise from the space in the electric room 11.

The transformers 13 and 13 'are supported by the gantry 18 in the transformer storage box and arranged at a position slightly higher than the floor of the electric room 11, and the lower portions of the transformers 13 and 13' and the electric room are connected to each other. Air passage 1 for passing cooling air to the floor
9 are formed.

As the transformers 13 and 13 ', a molded transformer in which a coil is molded with an insulating resin, an oil-filled transformer in which a transformer main body is housed together with insulating oil in a tank provided with a radiator, or a radiator Such as a gas insulated transformer that houses the transformer body together with insulating gas in a tank equipped with
Any type can be used.

The transformer storage boxes 20, 20 'are installed on the floor of the electric room 11 without the bottom plate, and are mounted on the transformers 13, 13'.
′ May be covered from the outside, having a bottom plate, and the transformers 13,
13 'may be supported.

When a bottom plate is provided in the transformer storage boxes 20 and 20 ', and the transformer stored therein is supported by the bottom plate, the transformer storage box storing the transformer in the factory may be directly used in the field. Can be installed in an electric room, so that the transformer can be easily assembled in the electric room.

In the illustrated example, the transformer storage boxes 20, 20 '
The bottom plate is omitted. When the bottom plate of the transformer storage box is omitted as described above, construction when applying the present invention to the transformer of the existing power receiving and distribution equipment can be facilitated.

In the present invention, the cooling boxes 21 and 21 are also provided.
Is disposed in the electric room together with the transformer storage boxes 20, 20 '.

Since the cooling boxes 21 and 21 'have the same configuration, only one of the cooling boxes 21 will be described. As shown in FIG. 2, the cooling box 21 has a partition wall 21 inside.
A, the cooling box 21 is formed of a box body divided into a heating chamber C1 located at a lower portion and a cooling chamber C2 located at an upper portion. 20a and the side wall 11a of the electric chamber 11 facing the side wall 20a. The cooling box 21 is configured such that the side wall 21 a on the transformer 13 side is
0a, and the side wall 21b on the opposite side to the transformer 13 is disposed in close contact with the side wall 11a of the electric chamber.
The heating chamber C1 is connected to the transformer through ventilation holes h1 and h2 provided at the upper and lower portions of the heating chamber and penetrating the side wall 21a of the cooling box and the side wall 20a of the transformer storage box 20. It is communicated inside the storage box 20. A blower 22 is attached to the lower ventilation hole h2 so that air in the lower space in the heating chamber C1 is supplied to the lower part of the transformer storage space S in the transformer storage box 20 by the blower 22. ing.

In the illustrated example, the side wall 2 of the transformer storage box 20
A ventilation duct 23 extending vertically in the transformer storage box is attached to the inner surface of Oa, and the lower end of the ventilation duct 23 communicates with the heating chamber C1 through a ventilation hole h1. The upper end of the ventilation duct 23 is opened at the upper part of the transformer storage space S, and when the blower 22 is operated,
The air above the transformer storage space S is introduced into the heating chamber C1 through the ventilation duct 23.

In this example, the ventilation duct 23 and the ventilation hole h
1 and h2 and the blower 22 forcibly generate an air flow through an air flow path from the upper part of the transformer storage space S through the heating chamber C1 of the cooling box 21 to the lower part of the transformer storage space S. The device is configured.

The blower 22 may be provided on the side of the ventilation hole h1 above the heating chamber or in the ventilation duct 23. When the blower 22 is provided on the side of the ventilation hole h1 or in the ventilation duct 23, the air in the ventilation duct 23 is sent into the heating chamber C1 by the blower 22, and the air in the heating chamber C1 is transformed through the ventilation hole h2. It is pushed out to the lower part of the container storage space S.

The cooling chamber C2 in the cooling box 21 is
2 through the intake hole h3 and the exhaust hole h4 provided in the state of being located at the lower part and the upper part, and penetrating the side wall 21b of the cooling box and the side wall 11a of the electric chamber. In the outdoors). In the illustrated example, a blower 24 is attached to the exhaust hole h4, and when the blower 24 is operated, the air in the cooling chamber C2 is exhausted to the outside of the electric chamber 11 and the outside air is discharged from the intake hole h3 to the cooling chamber. Introduced into C2, the forced ventilation in the cooling chamber C2 is performed.

In this example, the air in the cooling chamber C2 is supplied to the outside of the electric chamber 11 by the blower 24 and the intake hole h3 and the exhaust hole h4 for connecting the lower space and the upper space in the cooling chamber C2 to the outside. A forced-ventilation device is forcibly replaced with air.

The blower 24 may be provided on the side of the intake hole h3. When the blower 24 is provided on the side of the intake port h3, the outside air is introduced into the cooling chamber C2 by the blower 24 and the air in the cooling chamber is pushed out from the exhaust port h4, thereby forcibly ventilating the cooling chamber.

A heat pipe 25 is arranged in the cooling box 21. The heat pipe 25 is a well-known one in which a working fluid such as water, ammonia or the like is sealed in a highly heat-conductive pipe-like container 25a in which a porous wick for causing a capillary phenomenon is provided. The other end is a heating section 25a1 and a heat radiating section 25a2, respectively, and the heat absorbed by the heating section 25a1 is efficiently transmitted to the heat radiating section 25a2 by a cycle of evaporation and condensation of the working fluid.

In the illustrated example, the heat pipe 25 is substantially airtightly penetrating the partition wall 21A, and the heating section 25a1 and the heat radiating section 25a2 are located in the heating chamber C1 and the cooling chamber C2, respectively. And is fixed to the partition wall 21 </ b> A by appropriate means and supported by the cooling box 21.

In the example shown in FIG.
5 is provided, but a plurality of heat pipes are provided in the cooling box so that the heating section and the heat radiating section of each heat pipe are located in the heating chamber C1 and the cooling chamber C2, respectively. You may.

The cooling box 21, the heat pipe 25,
A transformer that cools the transformer 13 by an air circulation device that returns air above the transformer storage space S to the lower portion of the transformer storage space S through the heating chamber C1 and a ventilation device that ventilates the cooling room C2. A cooling device is configured.

On the inner surface of the cooling chamber C2 of the cooling box 21, a sound absorbing material 26 also serving as a heat insulating material is attached.

In the above apparatus, when the transformer 13 generates heat, the air temperature in the transformer storage space S rises. The air in the transformer storage space S whose temperature has risen and became light moves upward in the transformer storage space S. The air above the transformer storage space S is introduced into the heating chamber C1 through the ventilation duct 23. The heat energy of the air introduced into the heating chamber C1 is absorbed by the heating section 25a1 of the heat pipe 25. The heat energy absorbed by the heat pipe 25 evaporates the working fluid in the heat pipe, and is transported to the heat radiating portion 25a2 of the heat pipe 25 by the vapor of the working fluid. Since the inside of the cooling chamber C2 is forcibly ventilated and the low-temperature air constantly contacts the heat radiating section 25a2 of the heat pipe 25, heat exchange between the heat radiating section 25a2 of the heat pipe 25 and the air in the cooling chamber C2 smoothly. Then, the heat radiating portion 25a2 is cooled. The air in the cooling room whose temperature has risen by cooling the heat radiating portion 25a2 is discharged to the outside of the room by forced ventilation.

As described above, according to the present invention, the transformer housing box 20 housing the transformer, the cooling room C2 independent of the transformer housing space S in the transformer housing box 20, and the transformer housing space S A heat pipe 25 for transporting the heat of the air above to the cooling chamber C2 and transmitting it to the air in the cooling chamber;
A forced-ventilator for forcibly replacing the air in the cooling chamber C2 with the air outside the electric chamber is provided, and the heat generated by the transformer is continuously transported to the cooling chamber through a heat pipe having a high heat transfer efficiency. Thereafter, since the cooling chamber is discharged to the outside by forced ventilation, the transformer can be efficiently cooled without increasing the temperature of the air in the electric room.

The cooling box 21 'is constructed in exactly the same manner as the cooling box 21 and has one side wall 20a of the transformer housing box 20'.
'And the side wall 11 of the electric chamber 11 facing the side wall 20a'
a ′. The cooling box 21 ′ has its side wall 21 a ′ on the transformer 13 ′ side closely contacted with the side wall 20 a ′ of the transformer storage box 20 ′, and the side wall 2 on the side opposite to the transformer 13 ′.
1b 'is arranged so as to be in close contact with the side wall 11a' of the electric chamber.

The inside of the cooling box 21 ′ has the same structure as the connection structure between the cooling box 21 and the transformer housing box 20.
′ And an air circulation device similar to the air circulation device provided on the cooling box 21 side.
The air taken in from the upper part of the transformer storage space S in the cooling box 21 'passes through the lower heating chamber in the cooling box 21'.
To return to the bottom. A forced ventilation device similar to that provided for the cooling chamber C2 of the cooling box 21 is also provided for the upper cooling chamber in the cooling box 21 '. The forced ventilation in the cooling room is performed.

The heat pipe 25 is also provided in the cooling box 21 '.
′ Are arranged, and a heating section and a heat radiating section of the heat pipe are arranged in a heating chamber and a cooling chamber in the cooling box 21 ′, respectively.

A cooling box 21 ', a heat pipe 25',
The air above the transformer storage space S in the transformer storage box 20 ′ is passed through the heating chamber in the cooling box 21 ′.
′, An air circulation device that returns to the lower part of the transformer storage space S inside
A transformer cooling device that cools the transformer 13 ′ is configured by the forced ventilation device that ventilates the cooling chamber of the cooling box 21 ′.

In the example shown in FIGS. 1 and 2, the blowers 22 and 24 are operated only when necessary, or are operated so as to generate a required amount of air flow depending on the temperature of the transformer. Is preferred. To operate the blowers 22 and 24 only when necessary, a temperature sensor for detecting the temperature of the transformer 13 or the temperature of the air in the transformer storage space S, and the blowers 22 and 2 according to the detection output of the temperature sensor.
And a controller for controlling the supply of electric power to the air conditioner 4 when the temperature of the transformer 13 or the temperature of the air in the transformer storage space exceeds a set value.
Operation 4 may be performed.

In order to operate the blowers 22 and 24 so as to generate a required amount of air flow according to the temperature of the transformer, the temperature of the transformer or the temperature at which the temperature of the air in the transformer accommodating space is detected. A sensor and a control device for controlling the rotation speed of the blowers 22 and 24 in accordance with the temperature detected by the temperature sensor, and reducing the rotation speed of the blowers 22 and 24 when the temperature detected by the temperature sensor is low. When the temperature detected by the temperature sensor is high,
The operation of the blower may be controlled so as to increase the rotation speeds of the blowers and.

As described above, if the control device for controlling the operation of the blowers 22 and 24 according to the temperature of the transformer or the temperature of the air in the transformer accommodating space is provided, useless operation or excessive operation of the blowers 22 and 24 may occur. Since this can be prevented, the life of the blower can be extended.

In the above example, the transformer storage box and the cooling box are arranged close to each other. However, the transformer storage box and the cooling box need not necessarily be arranged close to each other. Is located at a location convenient for the installation of the transformer, and the cooling box is placed at a position close to the side wall of the electric room facing the outside, and a ventilation duct (or (Vent pipe).

In the above example, the cooling box 21 is provided for each transformer, and the cooling box is connected to the transformer storage box storing each transformer. However, a common cooling box is used for a plurality of transformers. The air above the transformer storage space in the transformer storage box that houses each transformer is led to the upper space of the heating room of the cooling box through the ventilation duct, and the air in the lower space of the heating room is passed through the ventilation duct. You may comprise so that it may return to the lower part of the transformer accommodating space in the transformer accommodating box which accommodated each transformer.

In the above example, the transformer storage box and the cooling box are formed separately. However, the interior of the transformer storage box is partitioned so that a cooling room and a heating room independent of the transformer storage space are provided. It may be.

In the above example, the heating section 25a1 of the heat pipe 25 is arranged in the heating chamber formed in the cooling box. However, the heating section 25a1 of the heat pipe 25 is arranged above the transformer accommodating space. The heat radiating portion 25a2 of the pipe may be arranged in a cooling room independent of the transformer storage space. In the case of such a configuration, the air heated by the heat generated from the transformer and moved to the upper part of the transformer storage space is absorbed by the heat pipe 25 and cooled, and then is cooled by natural convection. Move to the bottom.

When the temperature rise of the transformer is predicted in advance from the load demand curve or the like, the operation of the blowers 22 and 24 is started before the temperature of the transformer actually rises based on the prediction. Thus, predictive control may be performed so as to prevent a rise in the temperature of the transformer.

[0059]

As described above, according to the present invention, the transformer is housed in the transformer storage box, and the heat of the air heated by the heat generated by the transformer in the transformer storage box is converted into heat. Since the heat is transferred to the outside of the electric room continuously through the heat pipe and the forced ventilation device with high transmission efficiency, it is possible to efficiently cool the transformer without increasing the temperature of the air in the electric room. There are advantages that can be done.

As described above, according to the present invention, the temperature rise in the electric room can be prevented, so that not only the working environment in the electric room can be prevented from deteriorating, but also there is a problem in the attached devices near the transformer. Is prevented, the performance of the attached device can be sufficiently exhibited, and the life of the attached device can be extended.

Further, according to the present invention, not only can the transformer be cooled without increasing the temperature in the electric room, but also the noise generated by the transformer can be cut off from the outside by the transformer storage box, and the transformer can be cooled. Since the noise can be prevented from leaking to the outside of the electric room, power supply and distribution equipment is omitted by omitting the conventional large air supply and exhaust ventilators required to ventilate the electric room. Can be reduced in size.

Furthermore, according to the present invention, since the cooling of the transformer can be forcibly performed, the temperature of the insulator of the transformer can be reduced when the overload operation of the transformer is required. There is an advantage that overload operation can be performed without difficulty without excessively increasing the load.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of the configuration of a power receiving and distributing facility provided with a transformer cooling device according to the present invention, in which an electric room is sectioned.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a plan view showing an example of a configuration of a power receiving and distribution facility including a conventional transformer cooling device, in which an electric room is sectioned.

[Explanation of symbols]

 11 Electric room 13, 13 'Transformer 20, 20' Transformer storage box 21, 21 'Cooling box 22, 24 Blower 25 Heat pipe 25a1 Heating unit 25a2 Heat radiating unit S Transformer storage space C1 Heating room C2 Cooling room

Claims (2)

[Claims] 1. A cooling device for an indoor-installed transformer for cooling a transformer installed in an electric room provided inside a building, wherein the cooling device has a transformer storage space in which the transformer is disposed. A transformer storage box arranged in an electric room, a cooling room having an internal space independent of the transformer storage space, and a heat transfer device that transports heat of air above the transformer storage space into the cooling room to perform the cooling. An indoor-installed transformer, comprising: a heat pipe provided to transmit to indoor air; and a forced-ventilation device for forcibly replacing air in the cooling room with air outside the electric room. Cooling system. 2. A cooling device for an indoor installed transformer for cooling a transformer installed in an electric room provided inside a building, wherein the cooling device has a transformer storage space in which the transformer is disposed. A transformer storage box disposed in the electric room, a cooling box disposed inside the electric room together with the transformer storage box and partitioned into an upper cooling room and a lower heating room, and heating. And a heat pipe disposed in the cooling box with a radiator positioned in the cooling chamber, and a heating chamber of the cooling box from above the transformer storage space. An air circulation device that forcibly generates an air flow through an air flow path that reaches the lower part of the transformer storage space, and a forced ventilation device that forcibly replaces air in the cooling chamber with air outside the electric chamber. The feature is that Indoor installation transformer of the cooling device that.