KR20180067076A - Supply damper for supply air pressure type smoke control system - Google Patents

Abstract

The present invention relates to an air supply damper for an air supply pressure type smoke-induction system. More specifically, the present invention relates to an air supply damper for an air supply pressure type smoke-induction system, which is arranged between a front room formed on each floor of a building and a vertical air path formed perpendicularly to the building. Accordingly, in the event of a fire, the present invention adjusts an opening/closing amount between the vertical air path and the front room to which outside air is supplied, and the opening/closing amount to flow the outside air supplied along the vertical air path into the front room, so that a set differential pressure between the front and the inner chambers is formed. Therefore, the present invention prevents smoke generated in an inner room due to the pressure deviation between the inner room and the front room from spreading to a whole area of the building along the front room and an escape staircase room connected to the front room.

Description

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a supply damper for a supply-

More particularly, the present invention relates to an air supply damper for an air supply pressure type smoke-inducing system, and more particularly, to an air supply damper for an air supply pressure type smoke-inducing system, which is installed between a front room formed in each floor of a building and a vertical air- And the amount of opening and closing between the front and rear rooms formed in the floor is controlled so that outside air supplied along the vertical air flow is introduced into the front chamber to establish a set differential pressure between the front chamber and the inner chamber, To a smoke damper for an air supply pressure type smoke-inducing system which prevents smoke generated in a room by a pressure deviation of the room from spreading to the front room of a building along an entire floor and an escape staircase connected to the front room.

Generally, as cities become more sophisticated and integrated, large buildings, high-rise buildings and complexes are rapidly proceeding, and buildings that are vulnerable to fire are increasing. Thus, there is a great demand for effective fire prevention measures for safety of life.

Especially, the importance of ventilation system for control of smoke, which causes great disruption to evacuation and fire activity in fire, and which poses the greatest threat to the safety of life, is becoming more important.

In Korea, fire safety standards of staircase and all room ventilation facilities of the special evacuation staircase of NFSC501A are proposed in order to secure the safe evacuation route by preventing the penetration of smoke into the inside of the evacuation staircase when the building is fired.

In this standard, a set differential pressure (50 ± 20%) (at least 12.5 Pa when installing a sprinkler) is maintained between the ventilation zone and the inner chamber to prevent the penetration of smoke into the ventilation zone, and the opening force required to open the fire door is 110 N or less .

In addition, it is stipulated to require a smoke wind speed of 0.5 m / s to 0.7 m / s or more when the fire doors of the smoke-free area are temporarily opened for evacuation.

In this field, in the case of a fire, external air is forcedly supplied to all the rooms located between the inner and outer stairs of each floor of the building by using the air supply device and the vertical air flow to fire the entire room formed between the inner room and the escape stair room, Air supply pressure type ventilation system.

The air supply pressurizing type smoke inducing system includes a vertical air flow formed vertically to a building, an air supply device for forcibly supplying outside air to the vertical air flow, a front air chamber disposed between the vertical air flow and the front air chamber, And an air supply damper that adjusts the inflow amount and the inflow amount of the outside air flowing vertically according to the vertical wind direction according to the differential pressure value between the inner chambers, thereby forming the set differential pressure in the all chambers.

Here, the air supply damper opens and closes the opening / closing vanes provided in the air supply device to adjust the opening / closing amount between the vertical air flow and the front air chamber so as to control the flow rate of the outside air flowing into the front air chamber, .

The conditions for maintaining the set pressure differential to prevent smoke penetration and the conditions for opening the fire door down to a certain level so that the occupant does not have difficulty in opening the fire door for evacuation, The set differential pressure between the inner chamber and the front chamber must be adjusted between the lower limit value and the upper limit value.

Therefore, conventionally, the differential pressure between the front chamber and the inner chamber is measured to detect the differential pressure value of the front chamber in real time, and the opening and closing of the opening and closing wings provided in the supply mechanism of the supply damper is controlled according to the required differential pressure value, And the overpressure prevention and the air-cooling wind speed formation are automatically performed.

However, examination of the on-site performance evaluation results of the air supply pressure type ventilation system installed and operated in actual buildings shows that the air supply pressure type ventilation system does not exhibit the desired operation performance in a large number of buildings.

That is, the differential pressure between the front chamber and the inner chamber of the installation layer, which is the ventilation zone, is formed with an overpressure equal to or higher than the reference value, or conversely, the pressure is maintained below the reference value.

As a result of analyzing the causes of these main causes, it is found that, even if the air supply unit injects the outside air collectively along the vertical wind direction, the pressure of the vertical wind direction varies depending on the height.

In other words, different pressure values are formed depending on the height of the lower part, the height of the middle part, and the height of the upper part in the vertical wind speed formed on the building. Such a phenomenon may be caused by the stacking effect generated in the vertical wind speed of the building, When the vertical descent route is adopted as the ascending / descending route, the pressure fluctuation of the vertical descent due to the height is generated by the up and down operation of the elevator operated by the fire department or the like.

In particular, when the overpressure in the vertical wind direction is generated by the emergency operation of the elevator, the running resistance of the elevator is excessively generated, and the emergency operation of the elevator may be stopped.

If the differential pressure value of the entire chamber is maintained below the set differential pressure value, it can be solved simply by increasing the amount of flow of the external air by increasing the driving amount of the air supply apparatus. However, if the overpressure section within the vertical air flow rate is prolonged, Even when the damper is closed, the over-pressurized outside air leaks into the front chamber through the air supply mechanism of the air supply damper, and as a result, the outside air is excessively introduced into the front chamber of the installation layer communicating with the corresponding over- Full-chamber overpressure occurs.

If the overpressure of the vertical wind pressure section is caused by the overpressure of the vertical wind pressure section, the condition for maintaining the set pressure difference for preventing the smoke penetration and the opening force of the fire door are set to a certain level or less so that the occupant can not open the fire door for evacuation A problem arises in that the conditions for causing the organic compound to be inactive are not satisfied.

KR 10-1060666 B1 KR 10-2009-0099639 A KR 10-0671477 B1

It is an object of the present invention, which is devised to overcome the above-described problems, to provide a method of detecting an overpressure in a vertical wind speed section that is parallel to an installation layer in a vertical wind direction perpendicular to a building, And an air supply damper of an air supply pressure type smoke-inducing system in which an over-pressure in a vertical air-flow section in which an over-pressure is generated is eliminated in real time by controlling the air supply device or the exhaust device in real time.

The above object is achieved by the following constitutions provided in the present invention.

According to a preferred embodiment of the present invention, an air supply damper of an air supply pressure-

And is arranged between a front air chamber formed in each installed floor of the building and a vertical air flow formed perpendicularly to the building so as to control the opening and closing state between the vertical air- An air supply damper for an air supply pressure type smoke-induiling system in which outside air is introduced into a whole room to form a set differential pressure of an entire room,

The air supply damper further includes a vertical wind speed section pressure measurement section for measuring in real time the pressure value of the vertical wind speed section horizontal to the installation layer in the vertical wind speed,

And a function of measuring a pressure value of a vertical wind velocity section horizontal to the installation layer where the front chamber is located, in real time through the vertical wind velocity section pressure measuring section.

According to another aspect of the present invention, there is provided an air supply damper of an air supply pressure-

A damper housing disposed between the front windshield formed perpendicularly to the building and the front windshield formed in each installed floor of the building and communicating between the vertical windshield and the front windshield of the installation floor through the air supply mechanism;

A supply amount adjusting unit that is provided in the supply mechanism of the damper housing and sets an open / close state including the opening / closing amount of the air supply mechanism and adjusts the inflow amount and the inflow amount of the outside air supplied to the whole room along the vertical air- ;

A total chamber pressure measuring sensor for measuring a pressure difference between the front chamber and the inner chamber of the mounting layer to measure a pressure difference value of the front chamber;

A control unit controlling the driving of the air supply amount adjusting unit according to the total room pressure differential value measured through the all-room differential pressure measuring sensor to adjust the amount of outside air inflow into the all room from the vertical air condition; And

And a vertical wind speed section pressure measuring section for measuring in real time the pressure value of the vertical wind speed section horizontal to the installation layer in the vertical wind speed.

Preferably, the vertical wind speed section pressure measuring section is configured as a differential pressure sensor type that measures the differential pressure value of the vertical wind speed section horizontal to the installation layer and recognizes the pressure value of the vertical wind speed section,

The differential pressure sensor-type vertical wind speed section pressure measuring unit comprises:

The differential pressure value between the front chamber of the installation layer and the vertical wind velocity section horizontal to the front chamber is measured or the differential pressure value between the inner chamber of the installation layer and the vertical wind velocity section which is horizontal to the inner chamber is measured.

More preferably, the control unit compares the pre-input reference pressure value with the vertical wind speed section pressure measured by the vertical wind speed section pressure measuring unit to determine whether overpressure occurs in the vertical wind speed section horizontal to the installation floor in real time .

The control unit is configured to output a control signal to the external device to control the start-up of the external device when the occurrence of the overpressure in the vertical wind velocity section horizontal to the installation layer is detected, thereby eliminating occurrence of the overpressure of the vertical wind velocity.

As described above, according to the present invention, there is provided an air supply damper, which is disposed in a front chamber formed in each installation layer of a building, introduces outside air introduced through a vertical airflow into a front chamber according to a pressure difference value of the front chamber, There is provided a vertical wind speed section pressure measuring section for measuring a pressure value of a vertical wind speed section that is parallel to an installation layer provided with an air supply damper so that occurrence of an overpressure in a vertical wind speed section, .

Therefore, the air supply damper according to the present invention senses in real time whether or not an overpressure of vertical wind speed is generated according to the height of the installation layer, and controls the air supply device or the exhaust device according to whether the over- , It is possible to eliminate occurrence of overpressure of vertical wind speed.

Thus, the present invention eliminates the occurrence of the overpressure of the vertical wind speed caused by the stacking effect or the elevation of the elevator in the emergency operation, and consequently, the occurrence of the overpressure in the front chamber of each floor of the building is prevented, And a condition for causing the opening force of the fire door to be lower than a predetermined standard can be satisfied, respectively.

As in the present invention, if the vertical wind speed section pressure measuring section is integrally formed in the air supply damper and the control section recognizes whether the overpressure in the vertical wind speed section is generated through the vertical wind speed section pressure value, It is possible to recognize in real time whether or not an overpressure occurs, and it is possible to collect and utilize the overpressure occurrence information of the vertical wind speed section for each installed floor.

Fig. 1 shows the overall structure of an air supply damper of an air supply pressurized-type ventilation system proposed in the preferred embodiment of the present invention,
Fig. 2 is a view showing the entire construction of an air supply damper of an air supply pressurized-type ventilation system proposed in the preferred embodiment of the present invention,
3 shows the overall structure of a supply damper for a ventilation system having a vertical differential pressure measurement function of a vertical airflow as a preferred embodiment of the present invention,
Fig. 4 shows the overall structure of an air supply damper of an air supply pressure-type ventilation system proposed in the preferred embodiment of the present invention,
Fig. 5 shows the overall structure of an air supply damper of a supply air pressure type ventilation system proposed in the preferred embodiment of the present invention,
Fig. 6 shows the overall structure of an air supply damper of an air supply pressurized type ventilation system proposed in the preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an air supply damper of an air supply pressure type smoke induction system proposed as a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows the overall structure of an air supply damper of a supply air pressure type smoke induction system proposed in the preferred embodiment of the present invention, and FIG. 2 is a schematic view showing an air supply damper of an air supply- 3 shows the overall structure of an air supply damper for a ventilation system having a function of measuring the vertical differential pressure of the vertical airflow in accordance with a preferred embodiment of the present invention. FIG. 5 shows the overall configuration of the air supply damper of the air supply pressure type smoke-inducing system proposed as a preferred embodiment of the present invention, and FIG. 6 shows the overall configuration of the air supply damper of the air supply- The entire structure of the air supply damper of the supply air pressure type ventilation system proposed in the preferred embodiment of the invention It shows.

First, in the present specification, a section that is horizontal to the installation layer in which the air supply damper 1 according to the present invention is installed in the vertical wind direction 130 formed perpendicularly to the building is referred to as a "vertical wind direction section" This living space is referred to as a " bushroom ", and a ventilation space formed to be partitioned between the inner chamber and the evacuation staircase is referred to as "front chamber"

The air supply damper 1 of the supply air pressure type smoke induction system proposed in the preferred embodiment of the present invention is constituted by a vertical air flow path 120 formed vertically to the building 100 and an installation hole And the front chamber 110 of the installation layer communicates with the vertical wind velocity section which is horizontal to the installation layer from the vertical wind direction through the installation port 111. [

The air supply damper 1 introduces outside air vertically supplied to the building 100 along the vertical wind direction 120 into the front room 110 of the installation floor in the event of a fire, The smoke generated in the inner chamber 130 due to the pressure difference between the front chamber 110 and the inner chamber 1130 of the installation layer is formed between the front chamber 110 and the front chamber 110, And an escape staircase 140 communicating with the front chamber 110 to prevent smoke from being diffused into the entire space of the building 100.

The vertical wind direction 120 vertically formed on the building 100 and vertically supplying the outer air to each of the front and rear rooms may be formed by securing a separate vertical space in the building 100, An elevator conveying route that is constructed and provided to provide a vertical elevating route of the elevating machine can be utilized.

An air supply device 20 for forcibly supplying outside air into the vertical wind direction 120 is installed in the vertical wind direction 120 formed perpendicularly to the building 100 and communicating with the front room 110 of each installed floor do.

The air supply damper 1 according to the present embodiment is disposed between the front room 110 formed on each floor of the building 100 and the vertical air flow 120 formed perpendicularly to the building, A damper housing 10 which is disposed between the front windshield 120 and the front windshield 110 formed on each installed floor and has a windshield 11 communicating between the windshield 120 and the front windshield 110; A total room pressure differential measuring sensor 14 for measuring a differential pressure between the front chamber 110 and the inner chamber 130 to measure the pressure difference of the front chamber 110 in real time; Is set in the air supply mechanism (11) of the damper housing (10) to set the open / close state including the opening / closing amount of the air supply mechanism (11) An air supply adjusting unit 12 for adjusting inflow and outflow of inflow air; And a control unit 13 for controlling the open / close state of the air supply control unit 12 according to the pressure difference of the front chamber 120 measured through the front room pressure differential pressure measurement sensor 14 and forming a preset pressure difference in the front chamber 110 when a fire occurs, .

The air supply adjusting unit 12 includes a plurality of opening and closing blades 12a disposed in the air supply unit 11 and rotated in the forward and reverse directions by electric power and the vertical air flow 120 And the inflow amount of the outside air flowing into the front chamber 110 is controlled.

That is, the air supply control unit 12 normally closes the vertical wind direction 120 and the front room 110 by overlapping the opening and closing blades 12a so as to cross each other, .

When a fire occurs, the open / close blades 12a are opened or closed to allow outside air supplied along the vertical wind direction 120 to flow into the front room 110 through the open / close blades 12a.

Therefore, when a fire signal is received through the signal transmitting and receiving unit 13a through the signal transmitting and receiving unit 13a, the control unit 13 controls the entire room 110 and the inner room 130, The control unit 12 starts the supply control unit 12 in accordance with the measured total room pressure difference value to determine whether the supply control unit 12 has opened or closed the supply mechanism 11, The outside air supplied along the vertical wind direction 120 is introduced into the front chamber 110 to form a preset differential pressure in the front chamber 110. [

When the set differential pressure (50 Pa ± 20%) between the front chamber and the inner chamber is formed by controlling the open / close state of the air supply controller 12 according to the chamber pressure differential value measured in real time through the chamber differential pressure measurement sensor 14, A ventilation state is formed in which smoke generated in a fire room is prevented from being introduced into the front chamber due to a pressure deviation from the front chamber.

However, the vertical wind direction 120, in which the outside air is forcibly supplied through the air supply device 20, is not formed with the same pressure value by height due to the stacking effect or the elevating action of the elevator which is operated in the event of an emergency, The pressure value is changed according to the pressure.

For example, when a fire occurs, when the elevator rides along the elevator conveying path, which is a vertical wind direction, the overpressure section in which the outside air is compressed is generated at the upper part of the vertical wind direction.

Due to these factors, the overpressure phenomenon, which is higher than the set pressure, is inevitably formed in the vertical wind direction 120 installed perpendicularly to the building 100, and when overpressure occurs in the vertical wind direction interval The elevator that ascends and descends along the vertical wind direction 120 may cause obstacles to the lifting and lowering operation due to excessive resistance to over-pressurized outside air.

The air supply control unit 12 is configured to set the open / closed state between the vertical wind direction 120 and the front room 110 by adjusting the open / close state between the open / close blades 12a, When overpressure is generated, even when the opening and closing wings 12a of the air supply adjusting portion 12 are overlapped and the air supply mechanism 11 is closed, external air may leak into the front chamber through the opening and closing blades 12a.

In the present invention, an air supply damper (1) is disposed in each installation layer of the building (100) and sets an open state between the vertical wind direction (120) and the front room (110) And a vertical wind velocity section pressure measuring unit 15 for measuring the pressure value of the horizontal wind velocity section horizontally in real time.

That is, in the present invention, the vertical wind velocity section measuring section 15 is mounted on the air supply damper 1 to measure the pressure value of the vertical wind velocity section which is horizontal with the installation layer in the vertical wind velocity 120, And it is intended as a technical feature in the present invention.

The vertical wind velocity section pressure measuring section 15 according to the present embodiment is configured as a differential pressure sensor type that measures the differential pressure value of the vertical wind velocity section horizontal to the installation layer and recognizes the pressure value of the vertical wind velocity section.

The differential pressure sensor type vertical wind velocity section pressure measurement unit 15 measures the differential pressure value between the front wind direction 120 and the vertical wind direction 120 that is parallel to the front wind direction 120 Or to measure the differential pressure value between the inner chamber 130 of the mounting layer and the vertical air bearing section horizontal to the inner chamber 130 in the vertical wind direction 120 so that the pressure of the vertical wind section Value is measured in real time.

In the present specification, a differential pressure sensor type vertical wind velocity section pressure measuring section 15 is disposed between a front wind velocity section and a front wind velocity section that is parallel to the entire floor of the installation layer and the installation layer, The pressure value of the vertical wind speed section is recognized through the differential pressure value of the vertical wind speed section.

Therefore, in the air supply damper 10 according to the present embodiment installed in each installation layer of the building, the differential pressure value of the section of the vertical wind 120 that is horizontal to the installation layer is measured in real time through the vertical wind speed section pressure measurement section 15 do.

The control unit 13 compares the pre-input reference pressure value with the vertical wind velocity section pressure measured by the vertical wind velocity section pressure measurement unit 15 to determine the vertical wind velocity 120 that is horizontal to the installation floor It is recognized in real time whether overpressure occurs in the vertical wind speed section.

That is, the control unit 13 collates the pre-input reference pressure value with the vertical wind speed section pressure value measured in real time through the vertical wind speed section pressure measurement unit 15, and determines whether the vertical wind speed section pressure value is a reference deviation value Range), it is recognized that an overpressure has occurred in the corresponding vertical wind speed range.

The control unit 13 outputs a control signal for controlling the driving of the external devices 20, 30, and 40 to generate the vertical wind direction 120 when the overpressure of the vertical wind direction section horizontal to the installation floor is recognized. The occurrence of the overpressure in the vertical wind speed region where the overpressure occurs is eliminated.

The external devices 20, 30 and 40 controlled by the control signal include an air supply device 20 for supplying external air to the vertical wind direction 120, an entire room 110 of the installation floor and an escape staircase An internal exhaust device 30 such as a flap damper or an internal exhaust damper which is disposed in an internal exhaust window 132 formed between the front exhaust chamber 120 and the evacuation step chamber 140 to adjust the amount of opening and closing between the front chamber 110 and the evacuation step chamber 140, And an external exhaust device 40 such as a smoke exhaust window or an external exhaust damper 40 which is disposed in an external exhaust window 141 formed between the external space S and the external space S and which allows the escape staircase room 140 to communicate with the outside of the building Or more.

The internal exhaust device 30 and the external exhaust device 40 may be independently opened and closed by an independent control signal to discharge the outside air discharged from the entire chamber in which overpressure is generated to the outside, It is also possible to discharge the outside air discharged from the entire room where the overpressure is generated by being interlocked and opened.

Therefore, the control unit 13 of the supply damper 1 installed on the installation layer measures the pressure value of the vertical wind speed section that is horizontal with the installation layer through the vertical wind speed section pressure measurement unit 15, If the reference pressure value is exceeded, it is recognized that the section overpressure of vertical wind speed has occurred.

When the vertical wind speed section pressure value exceeds the reference pressure value and is recognized as the overpressure section of the vertical wind speed section, the controller 13 decreases driving of the air supply device 20, The amount of air supplied is reduced to reduce the pressure of the entire vertical wind direction entirely or the internal exhaust device 30 disposed between the front chamber 110 and the evacuation step chamber 140 of the installation floor and the evacuation step chamber 140 To the outside of the building through the entire room and the evacuation step staircase to adjust the opening and closing amount of the external exhaust device 40 that communicates with the outside of the building, Overpressure of the wind speed section is overcome.

1. Supply damper for supply air pressure type ventilation system
10. Damper Housing
11. Feeder 12. Supply controller
12a. Opening and closing wings 13. Control section
13a. Transmitter / Receiver unit 14. Total differential pressure measuring sensor
15. Vertical wind velocity section pressure measuring section
20. Air Supply Unit 30. Internal Air Supply Unit
40. External exhaust system
100. Building 110. All rooms
111. Installation area
120. Vertical wind direction
130. Inner room 131. Installation area
132. Inside window 140. Evacuation staircase
141. Outside window

Claims (10)

The air conditioner is arranged between the front room formed at each floor of the building and the vertical air space vertically formed in the building so as to adjust the open / To thereby form a set differential pressure of all the chambers, characterized in that, in the supply damper for an air supply pressure type smoke-
The air supply damper further includes a vertical wind speed section pressure measurement section for measuring in real time the pressure value of the vertical wind speed section horizontal to the installation layer in the vertical wind speed,
Wherein the pressure sensor is configured to have a function of measuring a pressure value of a vertical wind velocity section horizontal to a mounting floor in which a front wind chamber is located in a vertical wind velocity in real time through the vertical wind velocity section pressure measuring section. A damper housing disposed between the front windshield formed perpendicularly to the building and the front windshield formed in each installed floor of the building and communicating between the vertical windshield and the front windshield of the installation floor through the air supply mechanism;
A supply amount adjusting unit that is provided in the supply mechanism of the damper housing and sets an open / close state including the opening / closing amount of the air supply mechanism and adjusts the inflow amount and the inflow amount of the outside air supplied to the whole room along the vertical air- ;
A total chamber pressure measuring sensor for measuring a pressure difference between the front chamber and the inner chamber of the mounting layer to measure a pressure difference value of the front chamber;
A control unit controlling the driving of the air supply amount adjusting unit according to the total room pressure differential value measured through the all-room differential pressure measuring sensor to adjust the amount of the outside air inflow into the all room from the vertical air condition; And
And a vertical wind speed section pressure measuring section for measuring in real time the pressure value of the vertical wind speed section horizontal to the installation layer in the vertical wind speed. The vertical wind speed section pressure measuring unit according to claim 1 or 2, wherein the vertical wind speed section pressure measuring unit is configured as a differential pressure sensor type that measures a differential pressure value of a vertical wind speed section horizontal to the installation layer and recognizes a pressure value of a vertical wind speed section,
Wherein the differential pressure sensor type vertical wind velocity section pressure measurement section is configured to measure a differential pressure value between a front chamber of the installation layer and a vertical wind velocity section horizontal to the front chamber. The vertical wind speed section pressure measuring unit according to claim 1 or 2, wherein the vertical wind speed section pressure measuring unit is configured as a differential pressure sensor type that measures a differential pressure value of a vertical wind speed section horizontal to the installation layer and recognizes a pressure value of a vertical wind speed section,
Wherein the differential pressure sensor type vertical wind velocity section pressure measuring section is configured to measure a differential pressure value between an inner chamber of the installation layer and a vertical wind velocity section horizontal to the inner chamber. 3. The method according to claim 2, wherein the controller compares the reference pressure value with the vertical wind speed section pressure measured by the vertical wind speed section pressure measuring section to recognize whether overpressure occurs in the vertical wind speed section horizontal to the installation floor And the air supply damper of the air supply pressure type smoke damper system. 6. The method of claim 5, wherein when the vertical wind speed section horizontal to the installation floor is recognized as the overpressure occurrence section,
Wherein the controller is configured to output a control signal to an external device to control the start-up of the external device to eliminate an overpressure in a vertical wind speed section in which an overpressure is generated. The air supply damper according to claim 6, wherein the external device whose drive is controlled by the control signal is an air supply device for supplying external air to the vertical wind direction. The air damper for an air supply pressure damper system according to claim 6, wherein the external device whose drive is controlled by the control signal is an internal exhaust damper disposed in an internal exhaust window formed between a front chamber of the installation floor and an evacuation step chamber. 7. The air supply damper for an air supply pressure type smoke control system according to claim 6, wherein the external device whose drive is controlled by the control signal is an external exhaust damper disposed in an external exhaust window formed between an evacuation step- . The air supply damper according to claim 1 or 2, wherein the vertical air flow is vertically installed on the building to utilize a conveying path for an elevator that provides a vertical ascending / descending path of the elevator. .

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