KR102008327B1 - Switchgear box for fire protection - Google Patents

Abstract

The present invention relates to a fire prevention distribution board, capable of emitting heat using air, which comprises: a body unit having a discharge guide bent in a horizontal direction; a door unit rotated to open and close an accommodation space; and a cover unit having a guide insertion space to be concavely formed in a lower surface thereof.

Description

Fire prevention switchboard {SWITCHGEAR BOX FOR FIRE PROTECTION}

The present invention relates to a switchboard, and more particularly, to a fire protection switchboard that can reduce the heat generated by the components installed therein and reduce the possibility of fire.

Among the fires occurring recently, the proportion of electric fires is increasing. In general, electric fires are caused by short circuits, overcurrents, arcs, and short circuits. to be. In addition, the electric fire may be caused by the user's surrounding environment (submerged state, gas, temperature, poor home outlet connection). Most electric fires have been shown to be closely related to switchboards due to electric deterioration and overload.

In particular, the switchboard is used to supply power to a small area unit or building unit by converting the extra high voltage to commercial low voltage. Inside the switchboard, high voltage components such as high voltage transformers and switch contacts are installed. These high voltage parts can also be operated to generate heat. In addition, depending on the installation environment of the switchboard, heat may be transferred to the inside of the switchboard. As a result, malfunctions of the high-pressure parts due to heat generation may occur in the switchboard, and in particular, a fire may occur. There is a demand for measures to prevent fire in switchboards.

The technical problem to be achieved by the fire protection switchboard according to the technical idea of the present invention is to provide a fire protection switchgear capable of stably dissipating heat using air without supplying power.

Another object of the present invention is to provide a fire protection switchgear capable of significantly reducing the occurrence of fire.

In addition, the technical problem to be achieved by the fire protection switchboard according to the technical idea of the present invention, to provide a fire protection switchboard that can not be introduced foreign matters such as rain water.

The technical problem to be achieved by the fire protection switchboard according to the technical idea of the present invention is not limited to the above-mentioned problem, another task not mentioned will be clearly understood by those skilled in the art from the following description.

In the switchboard according to the exemplary embodiment of the present invention, an accommodating space is formed in a concave front surface, an inflow opening is formed in lower portions of both sides, a discharge opening is formed in an upper surface, and an upper surface along an edge of the discharge opening. A body portion having a discharge guide bent in a horizontal direction so as to extend upwardly and spaced apart from the discharge opening; A door part installed at the front of the body part and rotating to open and close the accommodation space; And a cover part provided on an upper surface of the body part to be connected to the accommodation space through the discharge opening, and a lower surface of the cover part having a concave guide insertion space formed therein, wherein the temperature of the internal air of the accommodation space is increased while the door part is closed. When the temperature of the outside air of the space is higher than the temperature of the outside air, the inside air of the receiving space is discharged through the discharge opening and the cover portion, the outside air of the receiving space is introduced into the receiving space through the inlet opening, and the cover portions are each formed in the form of bolts. A plurality of cover installation portions penetrating the inner upper surface of the accommodation space and the inner surface of the guide insertion space and spaced apart from each other at regular intervals; An installation support attached to an inner upper surface of the accommodation space while surrounding the lower end of the cover installation unit; A cover support portion formed in the form of a nut, coupled to the cover fixing portion, movable along the cover installation portion, and supported on the inner side of the guide insertion space; And a cover fixing part coupled to the cover mounting part and movable along the cover mounting part, the cover fixing part being in contact with the upper surface of the cover part, wherein the cover support part is spaced apart from the upper surface of the body part and guides the discharge guide. It is spaced apart from the inner surface of the insertion space, it may be characterized in that the distance between the lower end of the cover portion and the upper surface of the body portion located below the upper end of the discharge guide.

In addition, the installation support is made of a material that is soluble in heat according to the flame, when the flame is generated in the receiving space and the installation support is melted and separated from the inner upper surface of the receiving space, the cover installation is lowered in the receiving space and lowered the cover support, The cover part may contact the upper surface of the body part to seal the guide insertion space.

In addition, the body portion may further include an inlet guide located on the outer side of the body portion along the upper edge of the inlet opening and spaced apart from the inlet opening and extending to correspond to the inlet opening.

In addition, a door inlet opening is formed at the bottom of the door, and the door portion is located on the outer side of the door inlet opening along the upper edge of the door inlet opening and is spaced apart from the door inlet opening to extend to correspond to the door inlet opening. Further including, the outside air of the accommodation space may be introduced into the accommodation space through the door inlet opening when it is introduced into the accommodation space through the inlet opening.

In addition, the body portion is formed with guide openings on both sides of the inflow opening, respectively, the upper end of the inflow guide is hingedly connected to the outer surface of the body portion, and both side surfaces of the inflow guide are positioned to correspond to the guide opening, and the body portion is located at the guide opening. The control guide may further include a control guide positioned on an inner side of the accommodation space to support both side portions of the inflow guide inserted into the guide opening while closing the guide opening.

In addition, the control guide is made of a material burning in the flame, when the flame is generated in the receiving space and the control guide is burned and removed from the inner side of the receiving space, the inlet guide rotates to close to the inlet opening to close the inlet opening, Both side portions of the inlet guide can be inserted into the receiving space through the guide opening.

Fire prevention switchboard according to the embodiments according to the technical idea of the present invention has the following effects.

(1) It is possible to release heat stably using air without supplying power.

(2) The occurrence of fires can be significantly reduced.

(3) Prevent foreign matter such as rainwater from entering.

However, the effect that the fire protection switchboard according to an embodiment of the present invention can achieve is not limited to those mentioned above, and other effects not mentioned may be clearly understood by those skilled in the art from the following description. There will be.

BRIEF DESCRIPTION OF THE DRAWINGS In order to better understand the drawings referred to herein, a brief description of each drawing is provided.
1 is a perspective view showing an open fire prevention switchboard according to an embodiment of the present invention.
2 is a perspective view showing the fire protection switchboard according to an embodiment of the present invention in a closed state.
3 is a partial cross-sectional view of a cut along the cover of the fire protection switchboard according to an embodiment of the present invention.
4 is a cross-sectional view partially showing a state in which the fire protection switchboard according to an embodiment of the present invention is cut along the guide opening.

The present invention may be variously modified and have various embodiments, and specific embodiments are illustrated in the drawings and described in detail with reference to the accompanying drawings. However, this is not intended to limit the present invention to specific embodiments, it should be understood that the present invention includes all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

In describing the present invention, when it is determined that the detailed description of the related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, the numbers (eg, first, second, etc.) used in the description process of the present specification are merely identification symbols for distinguishing one component from another component.

In addition, in the present specification, when one component is referred to as "connected" or "connected" with another component, the one component may be directly connected or directly connected to the other component, but in particular It is to be understood that, unless there is an opposite substrate, it may be connected or connected via another component in the middle.

In addition, the components represented by '~' in the present specification may be divided into two or more components by combining two or more components into one component, or by one or more components. In addition, each component to be described below may additionally perform some or all of the functions of other components in addition to the main functions of which they are responsible, and some of the main functions of each of the components may be different. Of course, it may be carried out exclusively by the component.

Hereinafter, embodiments according to the spirit of the present invention will be described in detail.

1 is a perspective view showing an open fire protection switchboard 100 according to an embodiment of the present invention, Figure 2 is shown in a closed state fire protection switchboard 100 according to an embodiment of the present invention. 3 is a partial cross-sectional view of the fire protection switchboard 100 according to an embodiment of the present invention cut along the cover portion 103, and FIG. 4 is a fire according to an embodiment of the present invention. It is sectional drawing which partially shows the state which cut | disconnected the prevention switchboard 100 along the guide opening 101d.

As shown in Figure 1 to 4, the fire protection switchboard 100 according to an embodiment of the present invention includes a body portion 101, the door portion 102 and the cover portion 103, the high-pressure component It can be used to power the building by converting the extra high voltage to commercial low voltage. Here, the high voltage component may be a high voltage transformer, a switch contact, or the like.

The body portion 101 has a receiving space 101a, an inflow opening 101b, a discharge opening 101c and a guide opening 101d.

The accommodation space 101a is formed concave on the front surface of the body portion 101. The accommodation space 101a may have a shape corresponding to the shape of the body portion 101. For example, when the body portion 101 is in the shape of a rectangular parallelepiped, the receiving space 101a may have various shapes, but may be preferably in the shape of a rectangular parallelepiped. In addition, the accommodating space 101a may receive and install the high pressure component as mentioned above.

The inflow opening 101b can be formed in the lower part of the both sides of the body part 101, and can be used as a passage | path which air enters into the accommodation space 101a. In addition, the discharge opening 101c may be formed on the upper surface of the body portion 101, and may be used as a passage through which air is discharged from the accommodation space 101a. That is, the air naturally flows into the accommodation space 101a through the combination of the inflow opening 101b and the discharge opening 101c, and is discharged from the accommodation space 101a to cool the high-pressure part accommodated in the accommodation space 101a. It can be used to.

Guide openings 101d are formed at both sides of the inflow opening 101b on the side of the body portion 101, respectively.

In addition, the body portion 101 may include an inlet guide 111, an outlet guide 113, and a control guide 115.

The inflow guide 111 is located on the outer side of the body portion 101 along the upper edge of the inflow opening 101b and is spaced apart from the inflow opening 101b and extends to correspond to the inflow opening 101b. Here, the upper end of the inflow guide 111 may be hinged to the outer surface of the body portion 101 while adjacent to the inflow opening (101b). Both side portions 111a of the inflow guide 111 are positioned to correspond to the guide openings 101d, respectively, and the inflow opening 101b is positioned between both side portions 111a of the inflow guide 111.

The discharge guide 113 is bent in the horizontal direction so as to extend upward from the upper surface of the body portion 101 along the edge of the discharge opening 101c and to be spaced apart from the discharge opening 101c. Here, a discharge space 113a is formed in the discharge guide 113, and the discharge space 113a may be connected to the accommodation space 101a through the discharge opening 101c.

On the other hand, since the discharge guide 113 is configured to act in combination with the cover portion 103 to be described in detail, specific operation will be described in the configuration of the cover portion 103.

The control guide 115 is located on the inner side of the accommodation space 101a so as to correspond to the guide opening 101d. In addition, the control guide 115 may close the guide opening 101d and support both side portions 111a of the inflow guide 111 partially inserted into the guide opening 101d. Here, the inflow guide 111 forms a predetermined space that is open while being connected to the inflow opening 101b.

In addition, the control guide 115 restricts the further insertion of both side portions 111a of the inflow guide 111 toward the accommodation space 101a, thereby keeping the inflow opening 101b open. When the switchboard 100 is installed outdoors and exposed to a rainy environment, the inflow guide 111 may contact the falling rainwater to separate the rainwater from the inflow opening 101b. That is, the inflow guide 111 can block and prevent the inflow of rainwater into the inflow opening 101b.

On the other hand, the upper end of the inlet guide 111 is hinged to the outer surface of the body portion 101, the inlet guide 111 may be located in a state spaced upward from the inlet opening (101b). Here, when the control guide 115 is removed from the inner surface of the accommodation space 101a, the inflow guide 111 may be rotated to approach the inflow opening 101b by the action of gravity. As the inflow guide 111 is rotated to approach the inflow opening 101b, both side portions 111a of the inflow guide 111 may be further inserted into the guide opening 101d to be inserted into the accommodation space 101a. The opening 101b may be closed by the inflow guide 111.

In addition, the control guide 115 may be made of a material burning in flames. When a flame is generated in the accommodation space 101a and a fire occurs, the control guide 115 may be burned and removed from the inner side of the accommodation space 101a. At this time, since both side portions 111a of the inflow guide 111 are not supported by the control guide 115, the inflow guide 111 is rotated to approach the inflow opening 101b by the action of gravity, and thus the inflow opening 101b. ) Close. Due to this, when a flame is generated in the accommodation space 101a, the inflow opening 101b is closed by the inflow guide 111 by itself, so that air does not enter the storage space 101a through the inflow opening 101b. Can be.

The door part 102 is installed in the front of the body part 101, and rotates to open and close the accommodation space 101a. Here, the door 102 is formed in a plate shape, it is possible to close the receiving space 101a by being located in front of the body portion 101. In the state where the accommodation space 101a is closed, the door portion 102 may be fixed to the body portion 101. Here, air may be introduced into the accommodation space 101a through the inflow opening 101b and discharged from the accommodation space 101a through the discharge opening 101c.

The door inlet opening 102a may be formed in the door part 102. The door inlet opening 102a is formed in the lower part of the door part 102. The door inlet opening 102a can be used as a passage through which air enters the accommodation space 101a.

In addition, the door unit 102 may include a door inflow guide 121 and a door assistance guide 123.

The door inlet guide 121 is located on the outer side of the door portion 102 along the upper edge of the door inlet opening 102a and is spaced apart from the door inlet opening 102a to extend to correspond to the door inlet opening 102a. . Here, the door inlet guide 121 is connected to the door inlet opening 102a to form a predetermined open space. The door inlet guide 121 keeps the door inlet opening 102a open. Here, when the switchboard 100 is installed outdoors and exposed to a rainy environment, the door inflow guide 121 may contact the falling rainwater to separate the rainwater from the door inflow opening 102a. That is, the door inflow guide 121 may block and prevent inflow of rainwater into the door inflow opening 102a.

The door assistance guide 123 is positioned to correspond to the door inlet opening 102a at the inner side of the door part 102 and has a mesh shape. Here, the door assistance guide 123 is detachable from the inner surface of the door portion 102, it may be made in the form of bellows. When air is guided to the door assistance guide 123 through the door inlet opening 102a, foreign matter contained in the air may be filtered through the door assistance guide 123. The door assistance guide 123 may be used to reduce the inflow of foreign matter into the accommodation space 101a. In addition, since the door assistance guide 123 is detachable from the inner side of the door portion 102, it may be washed as needed.

The cover portion 103 is provided on the upper surface of the body portion 101 to be connected to the accommodation space 101a through the discharge opening 101c. In addition, when air is discharged from the accommodation space 101a through the discharge opening 101c, the air can be discharged through the cover portion 103.

The guide insertion space 103a is formed in the lower surface of the cover part 103, and the guide insertion space 103a has a depth greater than the height of the discharge guide 113. When the cover portion 103 is located on the upper surface of the body portion 101, the discharge guide 113 is inserted into the guide insertion space 103a, and the inner surface of the guide insertion space 103a is removed from the discharge guide 113. Are spaced apart. Here, the air may be discharged through the guide insertion space 103a and the discharge guide 113 and between the cover 103 and the upper surface of the body portion 101.

In addition, the cover part 103 may include a cover installation part 131, an installation support part 133, a cover support part 135, and a cover fixing part 137.

The cover mounting portion 131 is formed of a plurality of spaced apart from each other at regular intervals. The cover mounting portion 131 is formed in the form of a bolt, penetrates the inner upper surface of the accommodation space 101a and penetrates the inner surface of the guide insertion space 103a. Here, the lower end of the cover installation portion 131, which is the head of the bolt may be located in the accommodation space (101a).

The installation support part 133 is attached to the inner upper surface of the accommodation space 101a while wrapping the lower end of the cover installation portion 131 located in the accommodation space 101a. For this reason, the cover installation portion 131 may be maintained in a protruding state from the upper surface of the body portion 101.

The cover support part 135 is formed in the form of a nut, is coupled to the cover installation part 131, and is movable up and down along the cover installation part 131. The cover support part 135 is coupled to the cover installation part 131 and is supported by the inner side surface of the guide insertion space 103a. The cover support part 135 moves along the cover installation part 131 so that the gap between the lower end of the cover part 103 and the upper surface of the body part 101 and the upper end of the discharge guide 113 and the guide insertion space 103a. The gap between the inner surfaces can be adjusted. Here, the cover 103 may be spaced apart from the upper surface of the body portion 101, the discharge guide 113 may be spaced apart from the inner surface of the guide insertion space (103a).

The cover support part 135 separates the cover part 103 from the upper surface of the body part 101 to form a passage of air discharged from the discharge opening 101c. Here, the cover support 135 is preferably located below the upper end of the discharge guide 113, the interval between the lower end of the cover 103 and the upper surface of the body portion 101. As a result, the discharge guide 113 blocks rainwater that may flow into the guide insertion space 103a between the lower end of the cover portion 103 and the upper surface of the body portion 101, so that the rainwater discharges the opening 101c. It may be prevented from flowing into the accommodation space (103a) through.

The cover fixing part 137 is formed in the form of a nut, and is coupled to the cover installing part 131 in a state where the cover installing part 131 penetrates the cover part 103 and is positioned above the cover part 103. . The cover fixing part 137 moves along the cover installing part 131 and contacts the upper surface of the cover part 103. When the cover support part 135 is coupled to the cover installation part 131 and supported on the inner side surface of the guide insertion space 103a, the cover fixing part 137 contacts the upper surface of the cover part 103 to cover the cover part 103. ) Can be fixed to the cover installation unit 131.

In particular, in the present embodiment, the installation support 133 may be made of a material (eg, paraffin) that is soluble in heat due to the flame. When a flame is generated in the accommodation space 101a and a fire occurs, the installation support 133 may melt and be separated from the inner upper surface of the accommodation space 101a. At this time, the cover installation part 131 cannot be supported by the installation support part 133, and it descends toward the accommodating space 101a, and lowers the cover support part 135. As shown in FIG. For this reason, the cover part 103 contacts the upper surface of the body part 101, and seals the guide insertion space 103a. That is, when a flame is generated in the accommodation space 101a, the discharge opening 101c is closed by the cover portion 103 by itself, so that air may not flow into the storage space 101a through the discharge opening 101b. have.

The switchboard 100 of the present embodiment as described above converts the extra high pressure to commercial low voltage in a state in which the high-pressure part is accommodated in the accommodation space 101a of the body portion 101 to supply power to the building. When powering a building, high voltage components can operate and generate heat. Here, the temperature of the internal air of the accommodation space 101a is increased, and may have a temperature higher than the temperature of the external air of the accommodation space 101a.

Since the temperature of the internal air of the accommodation space 101a becomes high, the internal air of the accommodation space 101a rises and is discharged through the discharge opening 101c, and the external air of the accommodation space 101a and the inflow opening 101b and It may enter the accommodation space 101a through the door inflow opening 102a. In addition, since the outside air introduced into the accommodation space 101a has a lower temperature than the interior air of the accommodation space 101a, the outside air is led to the lower portion of the accommodation space 101a and discharged together with the internal air through the discharge opening 101c. It may not be.

As described above, the interior air of the accommodation space 101a is discharged to the outside after the temperature is increased, and the exterior air of the accommodation space 101a having a relatively low temperature is introduced into the accommodation space 101a and discharged. It is possible to replace the internal air of 101a). As a result, the internal temperature of the accommodation space 101a can be lowered. Therefore, the switchboard 100 of the present embodiment may emit heat generated by the operation without using power by using the flow of air. In addition, cooling of the high pressure component, reduced malfunction due to overheating of the high pressure component, and the likelihood of occurrence of fire may be reduced.

In addition, the inflow guide 111 of the body portion 101, the door inflow guide 121 of the door portion 102, the discharge guide 113 of the body portion 101, and the cover portion 103 may include the accommodation space 101a. Inlet opening (101b), door inlet opening (102a) and outlet opening (101c) are not directly exposed while passing air while allowing the inlet and outlet of air to and from the air. Here, when the switchboard 100 is installed outdoors and exposed to a rainy environment, the inflow guide 111 and the door inflow guide 121 are in contact with the falling rainwater to introduce the rainwater into the inflow opening 101b and the door inflow opening ( 102a).

In addition, the discharge opening 101c is formed on the upper surface of the body portion 101, so that rain water may easily flow into the accommodation space 101a through the discharge opening 101c. However, the discharge guide 113 is bent in the horizontal direction to extend upward from the upper surface of the body portion 101 along the edge of the discharge opening (101c) to be spaced apart from the discharge opening (101c). In addition, when the cover portion 103 is located on the upper surface of the body portion 101, the discharge guide 113 is inserted into the guide insertion space 103a of the cover 103, the discharge guide 113 is guide insertion The inner surface of the space 103a is spaced apart, and the lower end of the cover portion 103 is spaced apart from the upper surface of the body portion 101. The discharge guide 113 forms a jaw around the discharge opening 101c, and in the state inserted in the cover portion 103, the rain water covers between the lower end of the cover portion 103 and the upper surface of the body portion 101. Although it may flow into the guide insertion space 103a of the part 103, it may be blocked by the discharge guide 113 and may not flow into the accommodation space 101a through the discharge opening 101c. Therefore, the switchboard 100 of the present embodiment can prevent the inflow of rainwater into the accommodating space 101a, thereby preventing failure of the high pressure component accommodated in the accommodating space 101a due to the rainwater.

In particular, when a flame is generated in the accommodation space 101a of the switchboard 100 of the present embodiment, the installation support 133 is made of a material that melts by heat so that the inner upper surface and the cover installation part of the accommodation space 101a ( 131). At this time, the cover installation part 131 descends from the accommodation space 101a and lowers the cover part 103. The guide insertion space 103a of the cover portion 103 may be sealed while the discharge guide 113 is inserted. Here, air does not flow into the accommodation space 101a through the discharge opening 101c.

In addition, when a flame is generated in the accommodation space 101a, the control guide 115 is removed from the inner surface of the accommodation space 101a as it is made of a burning material. At this time, the inflow guide 111 is rotated to approach the inflow opening 101b by the action of gravity to close the inflow opening 101b, and air is not introduced into the accommodation space 101a through the inflow opening 101b. .

Therefore, in the switchboard 100 of the present embodiment, when a flame is generated in the accommodation space 101a, air does not flow into the accommodation space 101a, and thus, the flame may be prevented from increasing.

On the other hand, in the present embodiment, the door inlet guide 121 of the door part 102 is positioned hinged to the outer surface of the door part 102, like the inflow guide 111, due to the components corresponding to the control guide When a flame is generated in the accommodation space (101a) it may be used to block the inflow of air to the accommodation space (101a) through the door portion 102.

As mentioned above, although the technical idea of the present invention has been described in detail with reference to a preferred embodiment, the technical idea of the present invention is not limited to the above embodiments, and having ordinary skill in the art within the scope of the technical idea of the present invention. Many modifications and variations are possible.

100: fire resistant switchboard
101: body
102: door part
103: cover part

Claims (4)

A receiving space is concave in the front surface, an inlet opening is formed in the lower part of both sides, the discharge opening is formed in the upper surface, the discharge guide bent in the horizontal direction so as to be spaced apart from the discharge opening extending upward from the upper surface along the edge of the discharge opening Body portion formed;
A door part installed at the front of the body part and rotating to open and close the accommodation space; And
Is installed on the upper surface of the body portion to be connected to the receiving space through the discharge opening, the lower surface includes a cover portion formed concave,
When the temperature of the internal air of the accommodation space is higher and higher than the temperature of the external air of the accommodation space with the door portion closed, the interior air of the accommodation space is discharged through the discharge opening and the cover portion, and the external air of the accommodation space is Enters the receiving space through the inlet opening,
Cover part,
A plurality of cover installation portions each formed in the form of bolts, penetrating the inner upper surface of the accommodation space and the inner surface of the guide insertion space, and being spaced at regular intervals from each other;
An installation support attached to an inner upper surface of the accommodation space while surrounding the lower end of the cover installation unit;
A cover fixing portion formed in the form of a nut, coupled to the cover mounting portion, movable along the cover mounting portion, and in contact with an upper surface of the cover portion; And
It is made in the form of a nut, coupled to the cover fixing portion and movable along the cover mounting portion, and includes a cover support supported on the inner surface of the guide insertion space,
The cover support part spaces the cover part from the upper surface of the body part and spaces the discharge guide from the inner surface of the guide insertion space, and positions the gap between the lower part of the cover part and the upper part of the body part below the upper part of the discharge guide,
Body part,
An inlet guide located on an outer side of the body portion along an upper edge of the inlet opening and spaced from the inlet opening and extending to correspond to the inlet opening,
The body portion is formed with guide openings on both sides of the inflow opening, respectively, the upper end of the inflow guide is hinged to the outer surface of the body portion, and both side portions of the inflow guide are positioned to correspond to the guide opening,
Body part,
A control guide positioned on the inner side of the accommodation space so as to correspond to the guide opening, the control guide supporting both side portions of the inflow guide inserted into the guide opening while closing the guide opening;
The control guide is made of flame burning material, when the flame is generated in the receiving space and the control guide is burned and removed from the inner side of the receiving space, the inlet guide rotates to close the inlet opening, closing the inlet opening, Both sides of the switchgear, characterized in that inserted into the receiving space through the guide opening.
The method of claim 1,
The installation support is made of heat-melting material,
When a flame is generated in the accommodation space and the mounting support is melted and separated from the inner upper surface of the accommodation space, the cover mounting portion descends from the accommodation space and the cover support portion is lowered so that the cover portion contacts the upper surface of the body portion to seal the guide insertion space. Switchboard, characterized in that.
delete The method of claim 1,
The door inlet opening is formed in the lower part of the door part,
The door part,
Further comprising a door inlet guide located on an outer side of the door inlet opening along an upper edge of the door inlet opening and spaced apart from the door inlet opening to extend to correspond to the door inlet opening,
And the outside air of the accommodation space enters the accommodation space through the door inlet opening when it enters the accommodation space through the inflow opening.

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