KR102461459B1 - Fire door for building - Google Patents

Abstract

Various embodiments of the present invention provide a fire door for building firefighting which blocks infiltration of flames by a double fire door when a fire breaks out to prevent the fire from spreading, and uses fire water sprayed from a spray structure arranged on a door frame to quickly extinguish the fire. According to one embodiment of the present invention, the fire door for building firefighting comprises: a door frame arranged at the entrance of a building, and having a first opening part formed on one surface thereof; a first fire door coupled to the front surface of the door frame to be rotated around a hinge, and opening and closing the first opening part in accordance with rotation; and a second fire door arranged on the door frame, separated from the first fire door, and inserted into or withdrawn from a second opening part formed on a side of the door frame in accordance with a sliding movement to open and close the first opening part.

Description

FIRE DOOR FOR BUILDING

Various embodiments of the present invention relate to a fire door for fire fighting in a building that prevents the spread of fire by blocking the penetration of flame by a double fire door when a fire occurs in a building.

In general, fire doors are installed in buildings or public facilities such as buildings or apartments, and these fire doors are installed at the same location as the entrance or exit of stairs to prevent the spread of fire or smoke and secure a space for emergency escape. installed for the purpose of

The fire door is installed inside the door frame in which the opening of the building entrance is formed, the fire door is rotatably connected to the door frame, and is configured to open and close the opening of the door frame according to rotation.

This configuration is configured so that the user can open and close the fire door by holding the handle installed on the fire door.

However, the conventional fire door may be damaged due to high-temperature heat when a fire occurs, and there is a problem in that it is not possible to block the spread of flame or smoke through the doorway by the damaged fire door. For example, the conventional fire door is arranged in one, not double, in the door frame of a building. Therefore, when one fire door is damaged by high-temperature heat, flame or smoke directly penetrates into the doorway through the damaged fire door, causing breathing difficulties of the user. And in severe cases, it has the disadvantage of causing suffocation.

As a prior document related to the present invention, if there is Republic of Korea Patent Publication No. 10-1319296 (published on Oct. 17, 2013), the prior document discloses a description of "a fire door structure installed in the entrance hall of an apartment house".

In various embodiments of the present invention, by arranging the first and second fire doors not one at the entrance of the building, but two, the fire door for building fires that can further prevent the spread of fire by blocking the penetration of flames or smoke when a fire occurs in a building is to provide

In various embodiments of the present invention, there is provided a fire door for fire fighting in a building including a spray structure for suppressing the fire by spraying fire water on the door frame when a fire occurs in the building.

However, the technical problems to be achieved by the various embodiments of the present invention are not limited to the above technical problems, and other technical problems may exist.

According to various embodiments of the present disclosure, a fire door for building fire protection includes: a door frame disposed at an entrance of a building and forming a first opening on one surface; a first fire door that is rotatably coupled to the front surface of the door frame around a hinge and opens and closes the first opening according to the rotation; and a second fire door disposed on the door frame and spaced apart from the first fire door, the second fire door being drawn in or drawn out from the second opening formed on the side of the door frame according to the sliding movement to open and close the first opening. When a fire occurs in a building, the second fire door is drawn in by sliding movement in the second opening to face each other in a spaced apart state from the first fire door, and when a fire does not occur in the building, the The second fire door may be drawn out according to sliding movement in the second opening to be spaced apart from the first fire door and shifted from each other.

According to various embodiments of the present disclosure, the second fire door is introduced into at least a portion of the second fire door in a first direction or in a second direction opposite to the first direction through sliding movement from the second opening or It further includes a sliding structure for drawing out, wherein the sliding structure includes: a rack gear disposed on at least a portion of the second fire door, meshed with a rotation gear provided in a drive motor, and slidingly moved according to the rotation of the rotation gear; a first switch electrically connected to the driving motor and controlling the driving of the driving motor according to ON or OFF; and a first power supply unit for supplying power to the driving motor according to ON or OFF of the first switch.

According to various embodiments of the present disclosure, the door frame includes a spraying structure for spraying firefighting water when a fire occurs in the building, and the spraying structure is formed on a circumferential surface of the doorframe, and driving the firefighting water supply motor A plurality of spray nozzles for spraying the fire water supplied by the fire; a fire water supply motor connected to the plurality of spray nozzles and configured to supply fire water from a fire water tank to the plurality of spray nozzles according to driving; a second switch electrically connected to the fire fighting water supply motor and controlling the driving of the fire water supply motor according to ON or OFF; and a second power supply unit for supplying power to the firefighting water supply motor according to ON or OFF of the second switch.

According to various embodiments of the present disclosure, a second transparent window facing the first transparent window disposed at the center of the first fire door and a second transparent window facing each other may be disposed at the center of the second fire door according to sliding movement of the second fire door.

According to various embodiments of the present disclosure, a guide rail that is slidably coupled to a rail groove formed in the second fire door and guides the sliding movement of the second fire door may be disposed inside the door frame.

According to various embodiments of the present invention, a first fire door that opens and closes the first opening by rotation is disposed on a door frame, and the first opening is opened and closed according to a sliding movement in a second opening formed on the side of the door frame. By configuring the second fire door, when a fire occurs in the building, the first and second fire doors are double arranged to face each other to further improve the blocking of flame or smoke penetrating into the building, as well as The spread of fire can be further prevented.

In addition, by configuring a spray structure including a plurality of spray nozzles capable of spraying fire water when a fire occurs in the building on the circumferential surface of the door frame, the plurality of spray nozzles included in the spray structure are generated in the building by the sprayed fire water The fire can be easily extinguished, and the fire spreading to the building can be quickly blocked.

1 is an exploded perspective view showing the configuration of a fire door for fire fighting in a building according to various embodiments of the present invention.
2 is a perspective view illustrating a combined state of a fire door for fire fighting in a building according to various embodiments of the present invention.
3 is a perspective view illustrating a state of use of a first fire door among the constructions of a fire door for building fire protection according to various embodiments of the present disclosure;
4 is a front view illustrating a use state of a first fire door among the configurations of fire doors for building fire protection according to various embodiments of the present disclosure;
5 is a perspective view illustrating an operation of a second fire door among the constructions of a fire door for fire fighting in a building according to various embodiments of the present disclosure;
6 is a perspective view illustrating the operation of the first and second fire doors among the constructions of fire doors for building fire protection according to various embodiments of the present disclosure;
7 is a front view illustrating the operation of the first and second fire doors among the configurations of fire doors for building fire protection according to various embodiments of the present disclosure;

Since the present invention can have various changes and can have various embodiments, some embodiments will be described in detail with reference to the drawings. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

Terms including ordinal numbers such as 'first' and 'second' may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component. The term 'and/or' includes a combination of a plurality of related listed items or any of a plurality of related listed items.

In addition, relative terms described based on what is shown in the drawings, such as 'front', 'rear', 'top', 'bottom', etc., may be replaced with ordinal numbers such as 'first' and 'second'. In ordinal numbers such as 'first' and 'second', the order is the mentioned order or arbitrarily determined, and may be arbitrarily changed as necessary.

Terms used in the present invention are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present invention, terms such as "comprises" or "have" are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but one or more other features It is to be understood that this does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present invention, it should not be interpreted in an ideal or excessively formal meaning. does not

The fire door 10 for building fire protection according to various embodiments of the present invention comprises the first and second fire doors 30 and 40 that are dually arranged to block the penetration of flames or smoke into the entrance (not shown) of the building. It may be a combination of one or more of the various devices. Hereinafter, various embodiments of the present invention will be described with reference to the accompanying drawings.

1 is an exploded perspective view showing the configuration of a fire door 10 for building fire protection according to various embodiments of the present invention, and FIG. 3 is a perspective view showing the use state of the first fire door 30 among the configurations of the fire door 10 for building fire protection according to various embodiments of the present invention, and FIG. 4 is a fire door 10 for building fire protection according to various embodiments of the present invention. It is a front view showing the state of use of the first fire door 30 among the configurations of , FIG. 6 is a perspective view showing the operation of the first and second fire doors 30 and 40 among the configurations of the fire door 10 for building fire protection according to various embodiments of the present invention, and FIG. 7 is a building structure according to various embodiments of the present invention. It is a front view showing the operation of the first and second fire doors 30 and 40 among the components of the fire door 10 for fire fighting.

1 to 7 , the fire door 10 for building fire protection may include a door frame 20 and first and second fire doors 30 and 40 . For example, the door frame 20 may be disposed at an entrance (not shown) of a building, and first and second fire doors 30 and 40 to be described later may be double disposed.

For example, the door frame 20 may form a first opening 21 that is opened and closed according to the rotation of the first fire door 30 and the sliding movement of the second fire door 40 .

The first fire door 30 may be rotatably coupled to the front surface of the door frame 20 about a hinge A1 . For example, the first fire door 30 may open and close the first opening 21 according to rotation.

The second fire door 40 may be disposed on the door frame 20 and spaced apart from the first fire door 30 at the same time. For example, the second fire door 40 may be drawn in or drawn out from the second opening 22 formed on the side surface of the door frame 20 according to sliding movement to open and close the first opening 21 .

For example, when a fire occurs in the building, the second fire door 40 slides in from the second opening 22 toward the first direction (①) and is spaced apart from the first fire door 30 They can be face to face and face to face. In this case, the second fire door 40 may face the first fire door 30 and at the same time face each other so as to be double disposed. Accordingly, the first and second fire doors 30 and 40 are double arranged at the entrance of the building, so that the first and second fire doors 30 and 40 are heated by the high-temperature heat generated by the fire. ) is damaged, the second fire door 40 can block the high-temperature heat, thereby preventing flames or smoke from spreading through the entrance (not shown).

When a fire does not occur in the building (not shown), the second fire door 40 slides from the second opening 22 toward a second direction (②) opposite to the first direction (①). Accordingly, it can be drawn out and arguably separated from the first fire door 30 . In this state, the first fire door 30 may rotate around the hinge A1. Accordingly, the first fire door 30 may be used as an entrance to the building.

According to various embodiments, at least a portion (eg, an upper portion) of the second fire door 40 is provided with the second fire door 40 in the first direction (①) or the first direction opposite to the first direction (①). It may include a sliding structure 50 for retracting or withdrawing the second opening 22 according to the sliding movement in the two directions (②). For example, the sliding structure 50 may include a rack gear 51 , a first switch 52 , and a first power supply unit 53 . For example, the rack gear 51 may be disposed on at least a portion (eg, an upper portion) of the second fire door 40 . For example, the rack gear 51 may mesh with the rotation gear 54a provided in the drive motor 54 , and may slide and move according to the rotation of the rotation gear 54a of the drive motor 54 .

The first switch 52 is electrically connected to the driving motor 54 and may control the driving of the driving motor 54 according to ON or OFF.

The first power supply unit 53 may supply power to the driving motor 54 according to ON or OFF of the first switch 52 .

According to various embodiments, as shown in FIGS. 5 to 7 , when a fire occurs in the building, first, the first fire door 30 is rotated by a hinge A1 disposed on the door frame 20 to The front surface of the first opening 21 formed in the door frame 20 may be closed.

In this state, when the user turns on the first switch 52 , the first switch 52 may supply power from the first power supply unit 53 to the driving motor 54 . . In this case, the driving motor 54 may be driven according to the power supply of the first power supply unit 53 and simultaneously rotate the rotation gear 54a provided in the driving motor 54 in a forward direction.

For example, since the rotary gear 54a is meshed with the rack gear 51 disposed on the upper portion of the second fire door 40, the rack gear 51 rotates in the forward direction of the rotary gear 54a. It can slide in one direction (①).

For example, when the rack gear 51 slides in the first direction (①) according to the rotation of the rotary gear 54a in the forward direction, the second fire door 40 also moves in the first direction (①). You can slide towards it. For example, when the second fire door 40 slides, the second fire door 40 may be introduced into the second opening 22 formed on the side surface of the door frame 20 .

In this case, the guide rail 23 slidably coupled to the rail groove 42 formed in the lower portion of the second fire door 40 may be disposed inside the door frame 20 . For example, when the second fire door 40 slides and enters the second opening 22 of the side of the door frame 20 , the rail groove 42 at the lower portion of the second fire door 40 is the door frame. The guide may be moved along the guide rail 23 of the 20 .

In this way, the first opening 21 of the door frame 20 can be closed while the second fire door 40 is introduced into the second opening 22 . In this case, the first fire door 30 and the second fire door 40 may face each other and face each other. Accordingly, the first and second fire doors 30 and 40 may double close the first opening 21 of the door frame 20 .

In this case, the first transparent window 31 disposed in the center of the first fire door 30 and the second transparent window 41 facing each other may be disposed in the center of the second fire door 40 . For example, if the second fire door 40 slides in the first direction (①) and stops at the end position of the sliding movement at the same time, the first and second fire doors 30 and 40 may face each other, At this time, the first transparent window 31 of the first fire door 30 and the second transparent window 41 of the second fire door 40 may also face each other.

In this state, the user may check the external state of the entrance of the building through the first and second transparent windows 31 and 41 .

At this time, when a fire continues to occur outside the entrance of the building, the fire water C1 may be sprayed onto the fire through the spray structure 60 formed in the door frame 20 . For example, the spray structure 60 may include a plurality of spray nozzles 61 , a fire water supply motor 62 , a second switch 63 , and a second power supply unit 64 . For example, the plurality of spray nozzles 61 may be formed on the circumferential surface of the door frame 20 . For example, the plurality of spray nozzles 61 may spray the fire water C1 supplied by the driving of the fire water supply motor 62 to the fire emitted from the front of the door frame 20 . The fire water supply motor 62 may be connected to the plurality of spray nozzles 61, and according to the driving, the fire water C1 disposed in the fire water tank 67 may be supplied to the plurality of spray nozzles 61. have. The second switch 63 may be electrically connected to the fire fighting water supply motor 62 , and may control the driving of the fire water supply motor 62 according to ON or OFF.

The second power supply unit 64 may supply power to the fire water supply motor 62 according to ON or OFF of the second switch 63 .

In this state, when the user recognizes a fire generated outside the entrance of the building through the first and second transparent windows 31 and 41, the user turns on the second switch 63 can do. In this case, the second switch 63 may supply the power of the second power supply unit 64 to the fire fighting water supply motor 62 . At this time, the fire water supply motor 62 is driven according to the power supply of the second power supply unit 64 , and at the same time, the fire water supply motor 62 sprays the fire water C1 of the fire water tank 67 into the plurality of injections. It can be supplied to the nozzles (61).

The plurality of spray nozzles 61 may spray the supplied fire water C1 to the front of the door frame 20 . At this time, the sprayed fire water C1 may suppress the fire generated in the front of the door frame 20 . Accordingly, the plurality of spray nozzles 61 may prevent the spread of fire.

At this time, when the fire is extinguished by the fire water C1 sprayed from the plurality of spray nozzles 61 , the user may turn off the second switch 63 . In this case, the second switch 63 may cut off the power of the second power supply unit 64 to the fire water supply motor 62 .

At this time, when the power supply of the second power supply unit 64 is cut off, the fire fighting water supply motor 62 may be stopped. Accordingly, when the driving of the fire fighting water supply motor 62 is stopped, the fire water C1 supplied to the plurality of spray nozzles 61 may also be stopped.

According to various embodiments, when a fire does not occur in the building, the second fire door 40 moves from the second opening 22 toward a second direction (②) opposite to the first direction (①). It is drawn out according to the sliding movement and may be displaced from each other while being spaced apart from the first fire door 30 .

For example, when the user turns off the first switch 52 , the first switch 52 may supply power from the first power supply unit 53 to the driving motor 54 . At this time, the driving motor 54 is driven according to the power supply of the first power supply unit 53 and at the same time rotates the rotation gear 54a provided in the driving motor 54 in a reverse direction opposite to the forward direction. have.

For example, since the rotary gear 54a is meshed with the rack gear 51 disposed on the upper portion of the second fire door 40, the rack gear 51 is rotated in the reverse direction of the rotary gear 54a. It can slide toward the second direction (②) opposite to the first direction (①).

For example, when the rack gear 51 slides in the second direction (②) according to the rotation in the reverse direction of the rotation gear 54a, the second fire door 40 also moves in the second direction (②). You can slide towards it. For example, when the second fire door 40 slidably moves, the second fire door 40 may be drawn out from the second opening 22 formed on the side surface of the door frame 20 .

At this time, when the second fire door 40 slides and is withdrawn into the second opening 22 on the side of the door frame 20 , the rail groove 42 in the lower portion of the second fire door 40 is the door frame. The guide may be moved along the guide rail 23 of the 20 .

In this way, the first opening 21 of the door frame 20 may be opened while the second fire door 40 is drawn out into the second opening 22 . In this case, the first fire door 30 and the second fire door 40 may be shifted from each other. In this state, when the first fire door 30 is rotated by the hinge A1 , the first opening 21 of the door frame 20 may be opened.

Accordingly, the first fire door 30 may rotate to open the first opening 21 , and the second fire door 40 may slide to open the first opening 21 .

As described above, since the first and second fire doors 30 and 40 can open the first opening 21 of the door frame 20 , the door frame 20 can be used as an entrance to a building.

Hereinafter, a detailed operation of the fire door 10 for building fire protection according to various embodiments of the present invention will be described with reference to the accompanying drawings.

First, as shown in FIGS. 1 and 2 above, the fire door 10 for building fire protection may include a door frame 20 and first and second fire doors 30 and 40 . For example, the first fire door 30 may be rotatably coupled to the front surface of the first opening 21 formed in the door frame 20 . The second fire door 40 may be moved in or out of the second opening 22 formed on the side surface of the door frame 20 according to sliding movement.

According to various embodiments, a first fire-fighting connector 65 connected to the fire-fighting water supply motor 62 may be disposed on the upper portion of the door frame 20, and the fire-fighting water supply motor 62 has the fire water tank ( A second fire-fighting connector 66 connected to the 67 may be disposed. Accordingly, the second fire fighting connector 66 may supply the fire water C1 of the fire water tank 67 to the fire water supply motor 62 , and the first fire connection pipe 65 may connect the fire water supply motor 62 . The fire water C1 of the fire water tank 67 may be supplied to the door frame 20 by reference numeral 62 .

According to various embodiments, as shown in FIGS. 3 and 4 above, when a fire does not occur in the building, when the user presses the first switch 52 to OFF, the first switch 52 is Power may be supplied to the driving motor 54 through the first power supply unit 53 . The driving motor 54 may rotate the rotation gear 54a of the driving motor 54 in a reverse direction opposite to the forward direction according to the supply of power. At this time, the rotary gear 54a may slide the rack gear 51 disposed on the upper portion of the second fire door 40 in a second direction (②) opposite to the first direction (①). .

At this time, the second fire door 40 may also slide toward the second direction (②). At the same time, the second fire door 40 may be drawn out from the second opening 22 formed on the side surface of the door frame 20 .

The second fire door 40 may open the first opening 21 of the door frame 20 while being drawn out from the second opening 22 .

In this state, the first fire door 30 may rotate around the hinge A1 to open the first opening 21 .

In this way, when a fire does not occur in the building, the first and second fire doors 30 and 40 may be used as doors for opening and closing the entrance of the building.

According to various embodiments, as shown in FIGS. 5 to 7 , when a fire occurs in the building, first, the user rotates the first fire door 30 around the hinge A1 to rotate the door frame 20 . of the first opening 21 may be closed. In this state, when the user presses the first switch 52 to be ON, the first switch 52 may supply power from the first power supply unit 53 to the driving motor 54 . . The driving motor 54 may rotate the rotation gear 54a in a forward direction according to the supplied power. The rotary gear 54a may slide and move the rack gear 51 in the first direction (①) according to rotation in the forward direction.

At this time, the second fire door 40 may also slide in the first direction (①) and be introduced into the second opening 22 formed on the side surface of the door frame 20 . For example, the first opening 21 of the door frame 20 may be closed while the second fire door 40 enters the second opening 22 .

In this case, the first and second fire doors 30 and 40 may face each other while facing each other. At the same time, the first transparent window 31 disposed on the first fire door 30 and the second transparent window 41 disposed on the second fire door 40 may also face each other and face each other.

In this state, the user can grasp the external fire state of the entrance of the building through the first and second transparent windows 31 and 41

At this time, as shown in FIG. 6 above, when the fire continues outside the entrance of the building, when the user presses the second switch 63 to ON, the second switch 63 turns on the second power source. Power from the supply unit 64 may be supplied to the fire water supply motor 62 . For example, the fire fighting water supply motor 62 may be driven by the supplied power. At this time, when the fire fighting water supply motor 62 is driven, the fire water supply motor 62 applies the fire water C1 disposed in the fire water tank 67 to a plurality of spray nozzles formed on the circumferential surface of the door frame 20 ( 61) can be supplied.

At this time, the plurality of spray nozzles 61 may spray the supplied fire water C1 to the fire generated outside the entrance of the building. Accordingly, the plurality of spray nozzles 61 may suppress the fire by the sprayed fire water C1.

In this way, the first fire door 30 that opens and closes the front of the first opening 21 by rotation in the door frame 20 is disposed, and in the second opening 22 formed on the side of the door frame 20 , By configuring the second fire door 40 that opens and closes the first opening 21 according to the sliding movement, when a fire occurs in the building, the first and second fire doors 30 and 40 can be arranged to face each other. , thereby further improving the blocking of flames or smoke penetrating into the interior of the building, as well as further preventing the spread of fire.

In addition, by configuring a spray structure including a plurality of spray nozzles 61 capable of spraying fire water C1 when a fire occurs in a building on the circumferential surface of the door frame 20, the plurality of spray nozzles 61 are The fire can be quickly extinguished by the sprayed fire water (C1). This can prevent the fire from spreading to the building.

The fire door for building fire protection of various embodiments of the present invention described above is not limited by the above-described embodiments and drawings, and various substitutions, modifications and changes are possible within the technical scope of the present invention. It will be clear to those of ordinary skill in the art.

10: fire door for building firefighting
20: door frame 30, 40: first and second fire doors
50: sliding structure 60: spray structure
51: rack gear 52; first switch
53: first power supply 54: drive motor
60: spray structure
61: injection nozzle 62: fire water supply motor
63: second switch 64: second power supply unit

Claims (4)

In the fire door for building fire protection,
a door frame disposed at the entrance of a building and forming a first opening on one side;
a first fire door that is rotatably coupled to the front surface of the door frame around a hinge and opens and closes the first opening according to the rotation; and
a second fire door disposed on the door frame and spaced apart from the first fire door, the second fire door being drawn in or drawn out from the second opening formed on the side of the door frame according to sliding movement to open and close the first opening; and
When a fire occurs in the building, the second fire door is drawn in by sliding movement in the second opening to face each other while being spaced apart from the first fire door,
When a fire does not occur in the building, the second fire door is drawn out according to sliding movement from the second opening, and is stored apart from the first fire door to be displaced from each other,
At least a part of the second fire door further includes a sliding structure for drawing in or withdrawing the second fire door from the second opening according to the sliding movement of the second fire door in a first direction or a second direction opposite to the first direction, ,
The sliding movement structure.
a rack gear disposed on at least a portion of the second fire door, meshing with a rotation gear provided in a driving motor, and slidingly moving according to the rotation of the rotation gear;
a first switch electrically connected to the driving motor and controlling the driving of the driving motor according to ON or OFF; and
Includes; a first power supply for supplying power to the driving motor according to the on (ON) or off (OFF) of the first switch;
In the center of the second fire door, a second transparent window facing each other and the first transparent window disposed at the center of the first fire door is formed according to the sliding movement of the second fire door. A fire door for fire fighting in a building, characterized in that it checks the opposite side. delete According to claim 1, wherein the door frame comprises a spray structure for spraying fire water when a fire occurs in the building,
The spray structure is
a plurality of spray nozzles formed on the circumferential surface of the door frame and spraying the fire water supplied by driving of a fire water supply motor to the fire;
a fire water supply motor connected to the plurality of spray nozzles and configured to supply fire water from a fire water tank to the plurality of spray nozzles according to driving;
a second switch electrically connected to the fire fighting water supply motor and controlling the driving of the fire water supply motor according to ON or OFF; and
A fire door for building fire including a; a second power supply unit for supplying power to the fire water supply motor according to the ON or OFF of the second switch.


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