KR101293719B1 - Electric terminal box for apartment house - Google Patents

Abstract

PURPOSE: A distribution panel for the safe power supply arrangement of apartment buildings is provided to reduce the risk of a short circuit and electric leakage by minimizing the number of wires which are laid under cement mortar. CONSTITUTION: A ventilation duct (186) makes air flow in through an inlet. An air heater (184) heats the air to a given temperature. The air heater produces a hot wind. An outlet (187) and a ventilation fan (188) supply the hot wind to a terminal room (189). A controller (200) controls power supply.

Description

Electric terminal box for apartment house

The present invention relates to a switchboard for a stable power distribution of a multi-unit housing, and more particularly, the inside of the distribution box while distributing and arranging and arranging various wires installed in the ceiling or floor of the multi-unit house to be wired to the multi-family house. The present invention relates to a switchboard for stable power distribution of multi-unit houses, which is always kept in a proper dry state so that it can be safely managed without the risk of short circuit or power failure.

In buildings where multiple households or malls reside in a building, such as a multi-family house, wires drawn in from the outside must be received and distributed for each household or mall.

In general, such distribution and wiring takes place in an external distribution box.

This is because the electricity flowing into each household or mall can be controlled to control the selective supply of electricity as necessary, and is advantageous for management and maintenance.

In this case, however, many wires are drawn out from the distribution box and complicatedly wired in a space designed for wiring and plumbing wires and water pipes in a structure of a multi-unit house. As a result, the coating of the wires is broken, thereby increasing the risk of short circuits and short circuits.

In order to solve these problems, when the floor surface is constructed by placing cement mortar or the like on the ceiling or the floor, a method of embedding electric wires together with cement mortar is applied. However, even when the wires are laid as it is, many wires are irregularly disposed in the cement mortar structure, so that it is not easily combined with the cement mortar, thereby deteriorating the durability of the cement mortar structure.

In addition, the unnecessary space formation in the cement mortar structure causes the penetration of moisture and various corrosive substances in the cement mortar structure, which may accelerate the corrosion progress of the embedded wire, thereby causing a shortening of the life of the wire.

Even in such a structure, the infiltration itself such as moisture or moisture cannot be blocked at the source, and thus the drainage structure is provided.

In particular, if the humidity in the summer increases during the summer when the rainfall is concentrated, condensation may occur inside the distribution box even though moisture does not penetrate, and the inside of the distribution box is always kept wet, causing short circuits, short circuits, and shortening the lifespan of the wires.

Republic of Korea Patent No. 10-0626413 (Registration date: September 13, 2006), the title of the invention: "Electric terminal box installed on the ceiling of the public housing"

In order to solve the problems and necessity of the prior art, the present invention minimizes the number of wires to be embedded when the wires are embedded in the cement mortar structure, enables stable embedding, and moisture and various corrosion in the section where the joints are made between the wires. The purpose is to provide a switchboard for a stable power distribution of a multi-unit house to ensure that the interior of the terminal box is kept in a proper dry state so that contact between the material and the wire is minimized.

Switchgear for stable power distribution of the multi-unit housing of the present invention for achieving the above object,

A plurality of inlet grooves 132 formed by cutting upwardly along the sidewalls, protruding upwards along the inner edge, and a drain hole formed in the bottom surface between the sidewalls and the blocking protrusions 131. A body 130 having 133;

A plurality of protrusions having flexibility between the sidewalls and the blocking protrusions 131 are placed side by side along the blocking protrusions 131, wherein the protrusions are tightly embedded in a brush form;

The base 141 has a base 141 for connecting the end of the wire drawn into the main body 130 through the inlet groove 132 and a groove 142a into which the end of the wire 10 is inserted. 8 is arranged on the 141, two pairs in a pair and forming a square while forming a plane and a square block, and the conductive block 143 is inserted into the groove (142a) so as to be movable and made of a conductive material And a conductive second electrode 145 having four protrusions 144a for applying pressure by engaging the upper surfaces of the four conducting blocks 143 positioned in the diagonal directions with each other, and the remaining four conducting parts positioned in the diagonal directions. A conductive first electrode 144 having four protrusions 145a for engaging the upper surface of the block 143 to exert pressure and intersecting the second electrode 145 and being bent so as not to be in contact with each other; Above the first electrode 144 and the second electrode 145 A splitter connector 140 having a cover 146 fixed under pressure; And

It is formed at a position corresponding to the inlet groove 132 and has a fixing groove 111 on the circumferential surface to hold and fix the inlet wire 132 to the drawn wire 10 when engaged, the upper surface of the main body 130 It covers a cover 110,

The cover 110 forms an air inlet 185 through which air is introduced into one side of the outer upper surface, and an air inlet 185 is a passage through which air is introduced along the inlet 185. Hot air heating heater 184 for generating hot air by heating the air introduced to one side of the) and the discharge port 187 for supplying the hot air supplied through the air duct 186 to the terminal chamber 189. And a blowing fan 188, a humidity sensor 189a for sensing humidity inside the terminal chamber 189 on an upper inner side surface of the terminal chamber 189, and introduced into the terminal chamber 189. Exhaust ports 181 and 183a and an exhaust fan 182 formed at the upper end of the terminal chamber 189 and the cover 110 are formed on one side of the outer surface of the cover 110 so that hot air is forcedly exhausted. Control of operation by being electrically connected to the blowing fan 188, the humidity sensor 189a, the exhaust fan 182 Includes a controller 200 for controlling the power supply for the operation,

When the controller 200 receives a sensor value from the humidity sensor 189a and the received sensor value is larger than a preset reference value, the controller 200 determines that the humidity inside the terminal room 189 is equal to or greater than a predetermined humidity and the hot air By operating the heating heater 184, the blowing fan 188 and the exhaust fan 182, the internal humidity of the terminal chamber 189 is maintained below a predetermined humidity to maintain an appropriate drying state of the terminal chamber 189. .

The present invention having the configuration as described above minimizes the number of wires embedded in cement mortar to prevent the weakening of the cement mortar durability and maintain a constant dry state inside the electrical terminal box to block the water to minimize the risk of short circuit and short circuit It is effective.

The present invention is provided with a plurality of distribution connectors in the interior of the electrical terminal box can reduce the risk of short-circuit to clean the wiring process has the effect of easy management.

1 is a perspective view showing the installation state of the switchboard for a stable power distribution of the multi-family house according to an embodiment of the present invention.
Figure 2 is an exploded perspective view showing a switchboard for a stable power supply arrangement of a multi-family house according to an embodiment of the present invention.
3 is an exploded perspective view showing a state of a power distribution connector according to an embodiment of the present invention.
Figure 4 is a perspective view showing the use of the power distribution connector according to an embodiment of the present invention.
5 is a cross-sectional view showing the installation state of the switchboard for a stable power distribution of the multi-family house according to an embodiment of the present invention.
6 is a diagram illustrating a relationship between a controller and an external device according to an exemplary embodiment of the present invention.
And
7 is a view showing a drying process of the terminal chamber of the electrical terminal box using a controller according to an embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise.

Conventional electric terminal box has a problem that when the humidity in the air due to rainfall or other causes the moisture is infiltrated, moisture is agglomerated in the terminal box or condensation occurs, and the interior of the terminal box is kept wet to cause a short circuit and a short circuit.

Electric terminal box has a drainage structure in the terminal box because it can not block the penetration of moisture or moisture.

However, even in the electrical terminal box having such a drainage structure, there is always a risk of short circuit or short circuit due to internal penetration of moisture or moisture.

Hereinafter, the switchboard for stable power distribution of the multi-unit house of the present invention performs hot air drying into the inside of the terminal box by a hot air heating heater, thereby introducing humidity into the electric terminal box by maintaining humidity within a predetermined humidity, that is, in an appropriate drying state. It can prevent short circuit or short circuit caused by moisture.

1 is a perspective view showing the installation of the switchboard for a stable power distribution of the multi-family housing according to an embodiment of the present invention, Figure 2 is an exploded perspective view showing a switchgear for a stable power distribution of the multi-family housing according to an embodiment of the present invention. 3 is an exploded perspective view showing a state of a power distribution connector according to an embodiment of the present invention, and FIG. 4 is a perspective view showing a state of use of a power distribution connector according to an embodiment of the present invention.

Electrical terminal box 100 according to an embodiment of the present invention is embedded in the floor or ceiling of the building. In addition, the electrical terminal box 100 includes one or more distribution connectors 140 for receiving and distributing a plurality of wires 10.

In more detail, the electrical terminal box 100 is a main body 130 for wrapping and protecting the power distribution connector 140 to protect the joints which are in contact with each other for the power supply of the wire 10, and a cover for covering the main body 130 110.

The body 130 and the cover 110 is made of a material capable of withstanding the load of the cement mortar to be poured while having insulation. On the other hand, a plurality of inlet grooves 132 are formed on the side wall of the body 130. The inlet groove 132 may be formed corresponding to the number of the wires 10 that are wired to the entrance and exit port through which the wires 10 are drawn in and drawn out.

On the other hand, the fixing groove 111 is formed in the cover 110 corresponding to the inlet groove 132. The fixing groove 111 is formed at a position corresponding to the formation position of the inlet groove 132, and when the cover 110 is covered on the body 130, the wire 10 inserted into the inlet groove 132 is firmly shaken. To be fixed.

For this purpose, the inlet groove 132 should have a groove shape with an upper opening.

In the main body 130 on which the power distribution connector 140 is seated, a fence 120 that blocks the periphery of the power distribution connector 140 seated is positioned.

The fence 120 is formed of a plurality of protrusions having flexibility in the form of a brush, and tightly wraps the outer circumferential surface of the wire 10 inserted into the main body 130 through the inlet groove 132. ), It filters out foreign substances such as dust and moisture that flow into the inside.

A blocking protrusion 131 is formed between the fence 120 and the connector 140 for distribution. The blocking protrusion 131 blocks moisture entering the main body 130 after being condensed by the fence 120 while being absorbed by the inlet groove 132, and will be described in more detail with reference to FIG. 5.

The bottom surface of the main body 130 is provided with a support 160 for forming a predetermined space in the middle portion. In addition, the support 160 is disposed along the bottom edge of the body 130 to support the body 130. However, in the space formed through the support 160, the cement mortar being poured is introduced through the lower opening of the support 160 so that its volume is not excessively large. Meanwhile, a jaw 161 is formed on the upper surface of the support 160 to partition the space formed through the support 160 and the main body 130. This is to block the rise of various moisture that can stagnate in the space and to keep the connector 140 seated in the main body 130.

The barrier membrane 150 may be a synthetic resin material forming a porous structure such as a sponge so as to perform the above function.

A buffer member 170 is provided at the bottom of the support 160. The buffer member 170 is made of a material having a sponge structure similar to that of the blocking film 150. When the electric terminal box 100 according to the present invention is buried in the ceiling or the floor, the hot water pipe or the water and sewage pipe or the ceiling is piped to the ceiling or the floor. Or to minimize the interference with the reinforcing bars, etc. to secure the floor.

That is, as shown in Figure 1, the buffer member 170 is elastic and ductility irrespective of the size and piping position of the pipe 20 or reinforcing pipes and reinforcement, such as the ceiling or floor where the electrical terminal box 100 is embedded The buffer member 170 has a stable wrapping the outer peripheral surface of the tube 20 or reinforcing bar to enable a stable arrangement of the electrical terminal box (100).

On the other hand, since the tube 20 or the reinforcing bar is a conductor, a leakage current may flow from the power distribution connector 140 seated on the electrical terminal box 100 to cause an unexpected accident. Thus, the buffer member 170 is insulated between the tube 20 or the reinforcement and the electrical terminal box 100, which may be a conductor.

The coupling between the support 160 and the buffer member 170 is made through a plurality of fixing pins 162 protruding downward from the support 160. The fixing pin 162 is embedded in the buffer member 170 forming the sponge structure to fix the support 160 and the buffer member 170.

5 is a cross-sectional view showing the installation state of the switchboard for a stable power distribution of the multi-family house according to an embodiment of the present invention.

The electrical terminal box 100 according to the present invention is mounted on the main body 130, the connector 140 for distribution, the upper surface of the connector 140 for distribution is covered with the cover 110 is protected. In addition, the supporter 160 is formed below the main body 130 to form a predetermined space, and the barrier film 150 is formed to prevent the moisture of the space from rising and entering the main body 130.

On the other hand, the outer bottom surface of the blocking protrusion 131 is formed with a drain hole 133. The drain hole 133 allows the condensed moisture introduced through the inlet groove 132 to be drained into the space formed by the support 160. At this time, the moisture to be drained is first absorbed in the blocking film 150, the drainage in the body 130 is made smoothly.

The power distribution connectors 140 and 140 ′ may divide the height of wires by varying their heights, thereby reducing a problem in which a plurality of wires 10 inserted into the main body 130 are complicated. In general, the height of the power distribution connectors 140 and 140 ′ may be determined by the height of the base 141.

The electrical terminal box 100 according to the present invention is to protect the wire 10 buried in the cement mortar and to minimize the occurrence of hollow in the cement mortar due to the wire 10 to extend the life of the cement mortar, To this end, the number of wires 10 embedded in cement mortar should be reduced.

Therefore, the electrical distribution should be made in the electrical terminal box 100 embedded in the cement mortar.

This distribution is achieved through the connector 140 for distribution.

The power distribution connector 140 includes a base 141, a plurality of seating blocks 142 formed on the base 141, an energization block 143 which is fitted to the seating block 142 so as to be movable up and down, and And a first electrode 144 and a second electrode 145 for pressing the energization block 143 from above to fix the wire 10. The first electrode 144 and the second electrode 145 may be disposed as necessary. The cover 146 may further include a fixing.

One embodiment of the power distribution connector 140 according to the present invention is to enable one wire 10 to be divided into three wires, the connection of the wire is easy, compact and stable structure is tightly connected to the main body 130 It can be arranged in such a way that it can effectively utilize space.

To this end, the splitter connector 140 has eight seating blocks 142 arranged radially and is arranged in a square shape, and two seating blocks 142 form one surface.

A predetermined groove 142a is formed on the upper surface of the seating block 142.

The conductive block 143 of a conductive material is inserted into the groove 142a. In this case, the energization block 143 may be fixed to the groove 142a so as to be movable, and the energization block 143 may be shot from the seating block 142. For the shot of the energization block 143, a shot member such as a spring (not shown) is inserted into the groove 142a.

The energization block 143 is to energize the electric wire and at the same time to fix the electric wire so that the energization block 143 can be moved up and down so that the electric power block 143 is applied upward from the electric wire 10 inserted into the groove 142a. Can be fixed by pressing.

In addition, since the energization block 143 itself is a conductor, it is energized with the wire 10.

Meanwhile, the pressure applied to the energization block 143 is due to the first electrode 144 and the second electrode 145.

In general, the wire 10 requires two wires for a normal circuit configuration whether the current flowing through the wire 10 is alternating current or direct current. Therefore, in the case of distributing the wire 10, it is necessary to distribute the power in consideration of these two polarities.

The splitter connector 140 according to the present invention has two mounting blocks 142 forming one surface by forming two pairs of the mounting blocks 142 when the mounting block 142 is aligned in a square on the base 141. The seating block 142 has both polarities. That is, the pair of seating blocks 142 forming one surface of the square is energized with one wire 10.

Subsequently, for power distribution through the seating block 142, as in the embodiment of the present invention, when the two seating blocks 142 form a pair of squares and form a pair, electricity is supplied in the two seating blocks 142. The block 143 is generally energized with each one of the remaining three mounting blocks 142.

In more detail, one of the energization blocks 143 in the two seating blocks 142 disposed on the four surfaces are respectively energized through the two first and second electrodes 144 and 145.

To this end, the first electrode 144 and the second electrode 145 have the following shape so that a short circuit does not occur.

First, the first electrode 144 is seated on the upper surface of the seating block 142, and includes four protrusions 144a each having a flat plate shape to apply pressure to the energization block 143 at each end, and the middle part is seated. A bent portion 144b is bent into a central portion of the base 141 surrounded by the block 142.

Meanwhile, like the first electrode 144, the second electrode 145 includes four protrusions 145a at each end, but the bent portion 144b does not exist. This is because the bent portion 144b is formed not to be in contact with each other when the first electrode 144 and the second electrode 145 cross each other, and the second electrode is formed due to the bent portion 144b of the first electrode 144. This is because the 145 can be arranged as it is without bending.

However, the first electrode 144 and the second electrode 145 may have the bent portion 144b to avoid contact between the two electrodes 144 and 145 intersected on the base 141.

When the ends of the wire 10 are inserted into the grooves 142a of the first electrode 144 and the second electrode 145, the wires 10 are pressed and held by the energization block 143 to fix the connected wires with the same polarity. Energize.

As a result, when one wire 10 flowing from the outside is connected to one surface of the connector 140 for power distribution, electricity can be supplied to each generation while distributing the wires connected to the remaining three surfaces.

The cover 146 may be further included to collectively fix the electrodes 144 and 145. Thus, the base 141 is provided with a fixing part 147 to cover the cover 146 while pressing the electrodes (144, 145).

When the cover 110 of the embodiment of the present invention covers the main body 130, the terminal chamber 189, which is an inner space in which the connector for power distribution 140 is located, is formed and a closed space is formed to form a passage through which air is introduced. A passage is formed at the upper end.

' 형태로 수평 방향으로 소정의 길이로 형성되다가 통로 끝단에서 수직 방향으로 굴곡되는 구조를 가진다.The cover 110 forms an inlet 185 through which air is introduced into one side of the outer upper surface, and an air duct 186 is a passage through which air is introduced along the inlet 185.

'Is formed in a predetermined length in the horizontal direction and has a structure that is bent in the vertical direction at the end of the passage.

A hot air heating heater 184 is installed at one side of the inner side surface of the air duct 186 in the horizontal direction to generate hot air by heating the air introduced at a predetermined temperature.

A discharge port 187 and a blower fan 188 are formed at the lower end of the blower pipe 186 in the vertical direction so that hot air supplied through the blower pipe 186 is supplied to the terminal chamber 189 of the electrical terminal box 100.

A first exhaust port 181 is formed at one side of an upper inner surface of the terminal chamber 189 of the electrical terminal box 100 so as to be vented with the terminal chamber 189 so that hot air introduced into the terminal chamber 189 is forcedly exhausted.

The first exhaust port 181 is an exhaust fan having a moisture adsorption filter 183 formed to abut on the vertical upper portion and forcibly exhausting air to the outside of the terminal chamber 189 through the first exhaust port 181 thereon. 182 is formed.

The second exhaust port 183a is formed to be in contact with the vertical upper portion of the exhaust fan 182, and one side of the outer upper surface of the cover 110 passes through the air to exhaust the air in the terminal chamber 189.

The moisture adsorption filter 183 is made of porous material such as charcoal or elvan or loess grains to prevent the air exhausted to the outside from being excessively contained and discharged.

In addition, the moisture adsorption filter 183 adsorbs and removes moisture in the air discharged during the drying process of the terminal chamber 189 to prevent condensation of moisture in the first exhaust port 181 due to excessive moisture. do.

The upper inner surface of the terminal chamber 189 of the electrical terminal box 100 is provided with a humidity sensor 189a for detecting the humidity of the inside of the terminal chamber 189.

The controller 200 is formed at one side of the outer surface of the cover body and is electrically connected to the hot air heating heater 184, the blowing fan 188, the humidity sensor 189a, and the exhaust fan 182 to control and operate the operation. To control the power supply.

6 is a view showing a relationship between a controller and an external device according to an embodiment of the present invention, Figure 7 is a view showing a drying process of the terminal room of the electrical terminal box using the controller according to the embodiment of the present invention.

In the controller 200 according to the embodiment of the present invention, the hot air heating heater 184, the blowing fan 188, the exhaust fan 182, and the humidity sensor 189a are electrically connected to the control unit 210 and the control unit 210. By controlling the operation of each device and the power supply 220 for controlling the power supply for the operation of each device.

The control unit 210 receives the sensor value from the humidity sensor 189a, and if the received sensor value is larger than the preset reference value, the controller 210 determines that the humidity inside the terminal room 189 is higher than or equal to a predetermined humidity, and the hot air heating heater 184. ) And controls the blower fan 188 and the exhaust fan 182 to operate (S100, S102, S104).

The blowing fan 188 supplies hot air generated by the hot air heating heater 184 to the terminal chamber 189 on the blowing pipe passage 186, and the exhaust fan 182 includes air containing moisture inside the terminal chamber 189. By discharging to the outside, the internal humidity of the terminal chamber 189 is maintained below a predetermined humidity and an appropriate drying state is maintained.

When the humidity inside the terminal chamber 189 is equal to or higher than a predetermined humidity, the controller 210 controls the temperature of the hot air heating heater 184 to be maintained to maintain a constant temperature inside the terminal chamber 189.

The controller 210 receives the sensor value from the humidity sensor 189a and periodically monitors the sensor value. When the current humidity is smaller than the preset reference value, the controller 210 determines that the humidity inside the terminal room 189 is equal to or lower than a predetermined humidity, and the hot air heating heater 184. ) And generate a stop signal to stop the operation of the blower fan 188 and the exhaust fan 182 and transmit the generated stop signal to the hot air heating heater 184, the blower fan 188 and the exhaust fan 182 (S106). , S108, S110).

The embodiments of the present invention described above are not implemented only by the apparatus and / or method, but may be implemented through a program for realizing functions corresponding to the configuration of the embodiment of the present invention, a recording medium on which the program is recorded And such an embodiment can be easily implemented by those skilled in the art from the description of the embodiments described above.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

10: electric wire 20: tube
100: electrical terminal box 110: cover
111: fixing groove 120: fence
130: main body 131: blocking protrusion
132: inlet groove 133: drain hole
140; Distribution Connector 141: Base
142: seating block 142a: groove
143: energization block 144, 145: electrode
144b: bends 144a and 145a: protrusions
146: cover 147: fixing part
150: barrier 160: support
161: jaw 162: fixing pin
170: shock absorbing member 181: first exhaust port
182: exhaust fan 183: moisture adsorption filter
183a: second exhaust port 184: hot air heating heater
185: inlet 186: air duct
187: discharge port 188: blowing fan
189: Terminal room 189a: Humidity sensor
200: controller 210: control unit
220: power supply

Claims (1)

A plurality of inlet grooves 132 formed by cutting upwardly along the sidewalls, protruding upwards along the inner edge, and a drain hole formed in the bottom surface between the sidewalls and the blocking protrusions 131. A body 130 having 133;
A plurality of protrusions having flexibility between the sidewalls and the blocking protrusions 131 are placed side by side along the blocking protrusions 131, wherein the protrusions are tightly embedded in a brush form;
The base 141 has a base 141 for connecting the end of the wire drawn into the main body 130 through the inlet groove 132 and a groove 142a into which the end of the wire 10 is inserted. 8 is arranged on the 141, two pairs in a pair and forming a square while forming a plane and a square block, and the conductive block 143 is inserted into the groove (142a) so as to be movable and made of a conductive material And a conductive second electrode 145 having four protrusions 144a for applying pressure by engaging the upper surfaces of the four conducting blocks 143 positioned in the diagonal directions with each other, and the remaining four conducting parts positioned in the diagonal directions. A conductive first electrode 144 having four protrusions 145a for engaging the upper surface of the block 143 to exert pressure and intersecting the second electrode 145 and being bent so as not to be in contact with each other; Above the first electrode 144 and the second electrode 145 A splitter connector 140 having a cover 146 fixed under pressure; And
It is formed at a position corresponding to the inlet groove 132 and has a fixing groove 111 on the circumferential surface to hold and fix the inlet wire 132 to the drawn wire 10 when engaged, the upper surface of the main body 130 It covers a cover 110,
The cover 110 forms an air inlet 185 through which air is introduced into one side of the outer upper surface, and an air inlet 185 is a passage through which air is introduced along the inlet 185. Hot air heating heater 184 for generating hot air by heating the air introduced to one side of the) and the discharge port 187 for supplying the hot air supplied through the air duct 186 to the terminal chamber 189. And a blowing fan 188, a humidity sensor 189a for sensing humidity inside the terminal chamber 189 on an upper inner side surface of the terminal chamber 189, and introduced into the terminal chamber 189. Exhaust ports 181 and 183a and an exhaust fan 182 formed at the upper end of the terminal chamber 189 and the cover 110 are formed on one side of the outer surface of the cover 110 so that hot air is forcedly exhausted. Control of operation by being electrically connected to the blowing fan 188, the humidity sensor 189a, the exhaust fan 182 Includes a controller 200 for controlling the power supply for the operation,
When the controller 200 receives a sensor value from the humidity sensor 189a and the received sensor value is larger than a preset reference value, the controller 200 determines that the humidity inside the terminal room 189 is equal to or greater than a predetermined humidity and the hot air By operating the heating heater 184, the blowing fan 188 and the exhaust fan 182, the internal humidity of the terminal chamber 189 is maintained below a predetermined humidity to maintain an appropriate dry state of the terminal chamber 189 Switchboard for stable power distribution of apartments.

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