JPH08131569A - Pressurizing air supply device for appendant chamber for special escape stair and emergency elevator - Google Patents

Abstract

PURPOSE: To prevent smoke from entering an appendant chamber from a corridor as well as to hold the appendant chamber into the specified static pressure by blocking opening parts by means of air curtains when fire doors of the appendant chamber are opened in case of fire. CONSTITUTION: When a fire breaks out, operation of air curtains 16, 17 on a floor other than the fire floor and interlocking of opening and closing of fire doors 5, 6 are released on the basis of the operation of a manual switching device 11 of an appendant chamber on the fire floor and a command from a disaster prevention center 22. Moreover, a static pressure control damper 10 is fully closed. Accordingly, only air curtains 16, 17 on the fire floor can be interlocked with each other. Further, an air supply fun is also interlocked with the operation of a manual releasing device 11 or a command from the disaster prevention center 22 and started, so as to pressurize an air supply duct 9. The static pressure control damper 10 is also interlocked with the operation of the manual releasing device 11 or a command of the disaster prevention center 22, to operate only on the fire floor, and the static pressure control dampers 10 on the floors other than the fire floor are held in the full-closed state, so as to prevent smoke from entering the appendant chamber.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is designed to prevent the smoke in the corridor from entering the interior of a building when a fire occurs in the building even if the fire door of the compartment is opened. The present invention relates to a pressurized air supply device for an antechamber that maintains the static pressure in the annex by higher pressure than the static pressure in the corridor.

[0002]

2. Description of the Related Art A special evacuation staircase in a building and an attached room provided in an emergency elevator are the most important places in smoke prevention and exhaust equipment as the last torch of the evacuation passage on the fire occurrence floor. This is supported by the fact that the pressurized air supply method is often adopted with the special approval of Article 38 of the Minister of Construction.

As a method of pressurizing air supplied to the attached room, a method generally used in the related art is that when a fire is generated in a building in FIGS. 3 and 4, at the same time as an operation of the manual opening device 39 or a command from the disaster prevention center 41. Based on this, the damper 40 of the pressurizing air supply port 32 of the ancillary room 31 provided on the fire floor is opened, and the air supply fan (not shown) is started in conjunction with this to pressurize the inside of the ancillary room 31. By being supplied with air, the attached room 31
The internal static pressure is several mmH ₂ 0 (for example 3
˜4 mmH ₂ 0) It is configured to be held high.

However, in the case of pressurized air supply in the auxiliary room 31, it is necessary that the fire doors 35 and 36 facing the corridor 33 and the staircase 34 are closed. Further, if the static pressure in the auxiliary chamber 31 becomes abnormally high, it becomes difficult to open the fire door 35. Therefore, the extra pressurized air is supplied to the corridor 33 of the fire wall 37 forming the auxiliary chamber 31. The inside of the auxiliary chamber 31 is maintained at a constant pressure by being automatically discharged to the outside of the auxiliary chamber 31 from the pressure adjusting damper 38 with the FD attached to the side.

When an evacuee passes through the corridor 33 from inside the ancillary room 31, when the fire door 35 of the ancillary room 31 held at a specific static pressure is opened, the pressure adjusting damper 38 with the FD is closed. Then, the air in the attached room 31 is discharged from the opening of the fire door 35 to the corridor 33 side to prevent smoke from entering and to protect the safety of the evacuees.

[0006]

However, in the conventional air supply method, the pressurized air supply port 32 is irrespective of whether the two fire doors 35 and 36 provided in the auxiliary room 31 on the fire floor are opened or closed.
Since a fixed amount of air is constantly supplied to the auxiliary room 31 from this, this supply air is also supplied to the living room via the corridor.

Therefore, for example, when the window on the outer wall of the fire floor is closed, the smoke exhaust port is not open, or even if the smoke exhaust port is open, the exhaust volume is small and the exhaust volume is small. Since the entire fire floor is pressurized by the air supply, if you open the fire door of the staircase other than via the annex 31,
Air is pushed up and down through the stairs. In the worst case, this can spread smoke. Originally, in order to prevent such a problem, it is preferable that the fire floor is kept at a negative pressure when viewed from above and below the fire floor in order to trap smoke.

Moreover, the auxiliary chamber 31 can be pressurized only when the fire doors 35 and 36 are closed, and when the fire doors 35 and 36 are opened to allow evacuees to pass,
It becomes almost impossible to maintain the pressurized state in the auxiliary chamber 31. For example, even if the air supply amount is 10,000 m ³ / h, the wind speed at the openings of the fire doors 35 and 36 is 0.3 to 0.5 m / se.
Since it is within c, it is understood that it is difficult to maintain the pressurized state.

Further, since the fireproof section between the annex 31 and the corridor 33 is an important safety boundary line for evacuees, if a pressure adjustment damper with a temperature fuse is attached to the section and smoke is always opened, smoke will not be emitted. Since the temperature is not always high, it cannot be expected that the fuse will melt and the damper will operate. Therefore, it is considered very dangerous to rely on this method.

Therefore, the present invention has been made in view of the above-mentioned problems. Even when the fire doors 35 and 36 of the auxiliary chamber 31 are opened, the internal pressure of the auxiliary chamber 31 can be maintained at a predetermined static pressure and the corridor. It is possible to prevent smoke from entering the ancillary room 31 from 33, and to reduce the power consumption by minimizing the air volume of the pressurized air supply, and to be safe within the range of generally accepted emergency power supply capacity. The purpose of the present invention is to provide a pressurized air supply device for an attached room that can be operated at any time.

[0011]

In order to achieve the above object, the present invention prevents smoke in the corridor from entering the annex even when the fire door of the annex is opened when a fire occurs in the building. In order to achieve this, pressurize the annex and maintain the static pressure in the annex higher than the static pressure on the corridor side.In the pressurized air supply device of the annex, release the electromagnetic clutch in the annex other than the fire floor. By doing so, a static pressure controller is activated by the signal from the manual opening device or the disaster prevention center that commands the opening of the mechanical interlocking operation of the opening and closing of the fire door and the operation of the air curtain, and the sensor that detects the static pressure difference between the annex and the corridor side. A static pressure control damper for pressurizing and supplying air into the annex through the above, and a static pressure inside the annex that is installed at the top of the fire door to keep the static pressure in the annex and prevent smoke from entering the annex. For air curtains and fire-proof door opening / closing machines Ri door ON-OFF for air curtain that operates via an electromagnetic clutch in conjunction with the opening and closing of
It is characterized by comprising a damper, an air supply duct which is connected to the attached room and the air curtain to supply air, and an air supply fan which supplies air under pressure to the air supply duct.

Alternatively, a manual opening device or a disaster prevention center for instructing the opening of the mechanical interlocking operation of opening and closing the fire door and operating the air curtain by opening the electromagnetic clutch in the annex outside the fire floor, and the annex A static pressure control damper that pressurizes and supplies air into the auxiliary room via a static pressure controller in response to a signal from a sensor that detects the difference in static pressure from the corridor side, an air supply duct that connects the auxiliary room to supply air, and supplies air. An air supply fan that supplies pressurized air to the duct and an air curtain that is installed above the fire door to maintain static pressure inside the annex and prevent smoke from entering the annex when the door is opened. And an ON-OFF damper for an air curtain that operates via an electromagnetic clutch in conjunction with opening and closing of the door by a fire door opening and closing interlocking device, an air supply duct that is connected to the air curtain to supply air, and an air supply duct. Pressurization And is characterized in that consists of an air supply fan to care.

[0013]

According to the pressurizing air supply device of the annex of the present invention, even if the fire door of the annex is opened for the evacuees to pass through in the event of a fire,
By closing the opening with an air curtain, the static pressure inside the annex is maintained, and smoke is prevented from entering the annex through the corridor. Further, since the air amount for pressurizing and supplying the auxiliary chamber is adjusted by sensing the pressure difference between the inside and the outside of the auxiliary chamber, it becomes the minimum necessary for maintaining the required static pressure in the auxiliary chamber.

[0014]

Embodiments of the present invention will be specifically described below with reference to the drawings.

[0015]

Embodiment 1 FIGS. 1 and 2 show Embodiment 1 of the present invention,
FIG. 1 is a schematic plan view of a pressurized air supply device for an annex, and FIG. 2 is a side view showing a cross section of the annex of FIG. The annex 1 is formed by a fire wall 7, one side of which communicates with the corridor 3 via a fire door 5 and the other face of which communicates with the staircase 4 via a fire door 6. Since the fire doors 5 and 6 are self-closing by the force of the spring, they can be opened and closed freely.

An electromagnetic clutch (not shown) in an annex other than the fire floor is provided on one surface of the fire wall 7 without the fire doors 5 and 6.
Manual opening / closing device for opening the mechanical interlocking operation of opening and closing the fire door and air curtain operation by opening the
Further, a static pressure control damper 10 is provided which is connected to the air supply duct 9 to pressurize and supply the inside of the auxiliary chamber 1.

The static pressure control damper 10 is opened and closed by sensors 12 and 13 attached to the interior of the antechamber 1 and to the portion of the fire wall 7 facing the corridor 3 to detect the static pressure difference between the interior and exterior of the annex 1.
Based on the signal of (1), the air volume is adjusted to be the minimum necessary air volume for maintaining the required static pressure in the auxiliary chamber 1.

On the other hand, air curtains 16 and 17 connected to the air supply duct 9 and the air passage 21 are provided above the fire doors 5 and 6, and these air curtains 16 and 17 are linked to open and close the fire doors. In response to a command from the machine 15, the ON / OFF damper 19 for the air curtain is opened / closed via the electromagnetic clutch 18 in conjunction with opening / closing of the fire door 5 or 6.

The operation of the pressurized air supply device of the antechamber 1 having the above structure in normal times and during fire will be described below. First, during normal times, the air supply fan (not shown) that pressurizes the auxiliary chamber 1 is stopped, so the air supply duct 9 is not pressurized. Further, the static pressure control damper 10 that controls the static pressure in the auxiliary chamber 1 is fully closed. On the other hand, the air curtain ON-OFF damper 19 that interlocks with the opening and closing of the fire doors 5 and 6 of the annex 1 mechanically opens and closes the air curtains 16 and 17 via the fire door opening and closing interlocking device 15 and the electromagnetic clutch 18. There is.

When a fire occurs in this state, the manual switchgear 11 in the annex 1 on the fire floor or the disaster prevention center 22 is operated.
Based on the command from, the operation of the air curtains other than the fire floor (not shown) and the opening and closing of the fire door are opened, and the static pressure control damper is fully closed. Therefore, only the air curtains 16 and 17 on the fire floor can work together.

On the other hand, the air supply fan is also started in response to the operation of the manual opening device 11 or a command from the disaster prevention center 22, and the air supply duct 9 is pressurized. Static pressure control damper 10
In response to the operation of the manual opening device 11 or a command from the disaster prevention center 22, only the fire floor is started, and the static pressure control dampers on floors other than the fire floor are kept fully closed.

When the fire doors 5 and 6 provided in the annex 1 on the fire floor are closed, the ON-OFF damper 19 for the air curtain is closed in association with the closing, and the static pressure control damper 10 is closed. The static pressure in the annex 1 is several mmH ₂ O (for example, 3 to 4 m
mH ₂ O) is maintained so as to be higher.

In this case, the pressurized air supply amount is detected by the sensors 12 and 13 of the static pressure difference between the inside of the annex 1 and the corridor 3 side, and the static pressure controller 14 opens and closes the static pressure control damper 10. Is adjusted to the minimum necessary for maintaining the required static pressure in the antechamber 1. The air curtain ON-OFF dampers and static pressure control dampers on the floors other than the fire floor are completely closed, and no air is supplied.

On the other hand, when the fire doors 5 and 6 in the annex 1 are opened to pass through the annex 1 on the fire floor, the fire door opening / closing interlocking device 15 is operated in conjunction with the opening, and the electromagnetic clutch 18 is used. By opening the ON-OFF damper 19 for the air curtain, the jet 20 starts from the air curtain 16 or 17.

The jet 20 of the air curtain 16 or 17 closes the opening of the auxiliary chamber 1 and
2 is curved inside the annex 1 as shown by the arrow in FIG. 2, so that the static pressure in the annex 1 is kept slightly higher than the corridor 3 side (for example, 3 to 4 mmH ₂ O), and smoke is emitted in the corridor 3 To prevent the intrusion into the annex 1.

If a fire spreads to the upper and lower floors, the manual opening device 11 or the disaster prevention center 22 may be operated in the same manner as described above to pressurize the antechamber on the fire floor.

[0027]

[Embodiment 2] In Embodiment 1, the air curtains 16 and 17 were connected to the duct 9 and the air passage 21 for pressurizing and supplying the inside of the auxiliary chamber 1. However, in this embodiment, the air curtains 16 and 17 are Air curtain 1 without connecting 17 to duct 9
A fan dedicated to 6 and 17 and an air passage (not shown) for blowing air are independently provided. The other configurations and effects are the same as those in the first embodiment, and therefore the description thereof is omitted.

[0028]

According to the pressurized air supply device for the annex of the present invention,
Even if the evacuees open the fire doors provided in the annex to allow the evacuees to pass through in the annex, the static pressure inside the annex is maintained by closing the opening with an air curtain.
It is possible to prevent smoke from entering.

The static pressure inside the annex is determined by sensing the static pressure difference between the inside and outside of the annex, and the static pressure control damper is used to maintain the required static pressure in the annex. As compared with the conventional case where the average air volume is supplied regardless of whether the fire door is opened or closed, the supply rate is reduced to a fraction of that of the conventional pressurized air supply system, and the air supply volume in the conventional pressurized air supply system becomes excessive. It is possible to prevent the accompanying harmful effects.

Furthermore, since all the operating devices can be operated within the range of the emergency power source capacity, no special power source or power is required. In addition, the safety is high because there is no damper that penetrates the fireproof compartment between the annex and the corridor.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a pressurized air supply device for an annex of the present invention.

FIG. 2 is a side view showing a cross section of FIG.

FIG. 3 is a schematic plan view of a conventional pressurized air supply device for an attached room.

FIG. 4 is a side view in which FIG. 3 is a cross section.

[Explanation of symbols]

 1 Annexed room 3 Corridor 4 Staircase 5, 6 Fire door 7 Fire wall 9 Air supply duct 10 Static pressure control damper 11 Manual opening device 12, 13 Sensor 14 Static pressure controller 15 Fire door opening interlocking device 16, 17 Air curtain 18 Electromagnetic Clutch 19 ON-OFF damper for air curtain 20 Jet 21 Wind path 22 Disaster prevention center

Claims (2)

[Claims] 1. When a fire occurs in a building, the interior of the annex is pressurized to prevent smoke on the corridor side from entering the annex even if the fire door of the annex is opened. In the pressurized air supply device of the annex room that keeps the static pressure higher than the static pressure on the corridor side, by opening the electromagnetic clutch in the annex room other than the fire floor, the mechanical operation of opening and closing the fire door and operating the air curtain is performed. A manual opening device or a disaster prevention center that commands the opening of the interlocking operation, and a static pressure control damper that pressurizes and supplies air into the auxiliary room via a static pressure controller by the signal of a sensor that detects the static pressure difference between the auxiliary room and the corridor side. , An air curtain installed above the fire door to keep static pressure inside the annex and prevent smoke from entering the annex when the door is opened, and a fire door interlocking device opens and closes the door. Works via an electromagnetic clutch ON-OFF for air curtain
A special evacuation staircase and an emergency elevator with a damper, an air supply duct connected to an attached room and an air curtain to supply air, and an air supply fan for supplying air under pressure to the air supply duct. Pressurized air supply device for the room. 2. When a fire occurs in a building, the interior of the annex is pressurized to prevent smoke on the corridor side from entering the annex even if the fire door of the annex is opened. In the pressurized air supply device of the annex room that keeps the static pressure higher than the static pressure on the corridor side, by opening the electromagnetic clutch in the annex room other than the fire floor, the mechanical operation of opening and closing the fire door and operating the air curtain is performed. A manual opening device or a disaster prevention center that commands the opening of the interlocking operation, and a static pressure control damper that pressurizes and supplies air into the auxiliary room via a static pressure controller by the signal of a sensor that detects the static pressure difference between the auxiliary room and the corridor side. , An air supply duct which is connected to the attached room to supply air, and an air supply fan which supplies air under pressure to the air supply duct,
An air curtain installed above the fire door to keep static pressure inside the annex when it is opened and to prevent smoke from entering the annex inside the corridor, and to open and close the door with a fire door interlocking device. It consists of an ON-OFF damper for the air curtain that operates in conjunction with each other via an electromagnetic clutch, an air supply duct that is connected to the air curtain to supply air, and an air supply fan that supplies air under pressure to the air supply duct. Pressurized air supply device for special evacuation stairs and auxiliary room for emergency elevator.