JP3390772B2 - Pressurized air supply in the auxiliary room of the emergency elevator - Google Patents

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 An annex room provided in an emergency elevator for a building is the most important place in the smoke prevention and exhaust system as the last torch of the evacuation passage on the fire occurrence floor. This importance is also supported by the fact that the pressurized air supply system is often adopted under the special approval of Article 38.

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 static pressure inside is a few 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 the evacuees, if a pressure adjusting damper with a temperature fuse is attached to the firebreak section and is always open, 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 means of the static pressure controller, the command means for commanding 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 signal of the sensor that detects the static pressure difference between the interior of the annex and the corridor A static pressure control damper that supplies pressurized air to the room, 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 fire door is opened. And the fire door opening / closing interlocking device can be used to open and close the fire door. A supply duct for the ON-OFF damper air curtain, the air supply coupled to biasing chamber and an air curtain that operates via an electromagnetic clutch and,
It is characterized by comprising an air supply fan for supplying air under pressure to the air supply duct.

Alternatively, command means 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.
A static pressure control damper that pressurizes and supplies air into the annex through a static pressure controller based on a signal from a sensor that detects the difference in static pressure between the annex and the corridor, and an air supply duct that connects to the annex and supplies air. , The air supply fan that supplies air under pressure to the air supply duct, and the static pressure inside the annex that is installed above the fire door to prevent static smoke from entering the annex when the door is open. An air curtain, an ON-OFF damper for the air curtain that operates via an electromagnetic clutch in conjunction with the opening and closing of the fire door by the fire door opening and closing interlocking device, and an air supply duct that connects the air curtain to supply air. It is characterized by comprising an air supply fan for supplying air under pressure to the air supply duct.

[0013]

According to the present invention, in the event of a fire, the electromagnetic clutch in the antechamber other than the fire floor is operated by the operation of the manual shut-off device and / or opened by a command from the disaster prevention center to open / close the fire door and air. Since the mechanical interlocking operation with the curtain operation is interrupted, the pressurized air is not supplied to the auxiliary rooms other than the fire floor, and the pressurized air is reliably supplied only to the auxiliary rooms on the fire floor. Also, on the fire floor, the air curtain provided on the fire door automatically operates and the opening of the attached room is blocked by the air curtain, so that the blame can open the fire door when passing. Also, the static pressure inside the annex is maintained at a predetermined level, and smoke in the corridor is prevented from entering the annex. The static pressure inside the annex is automatically adjusted by sensing the pressure difference inside and outside the annex.

[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. The fire doors 5 and 6 are of a self-closing type that can be freely opened and closed by the force of a spring.

An intake duct 9 and an air passage 21 are provided on an upper portion of one surface of the annex 1, and air curtains 16 and 17 are connected to the air passage 21. On the other hand, the intake duct 9
An air passage 9a for supplying pressurized air is continuously provided in the auxiliary room. Sensors 12 and 13 for detecting static pressures inside and outside the auxiliary chamber 1 are provided inside and outside the auxiliary chamber 1, an ON-OFF damper 19 for an air curtain is provided at the wind passage 21, and a fire door 5 is provided.
A fire door opening interlocking device is provided in the upper part of the, and the damper 19 is opened and closed by the operating portion 19 by operating the electromagnetic clutch 18 in conjunction with opening and closing of the fire door 5. On the other hand, a static pressure control damper 10 is provided on the wind passage 9a, and the static pressure control damper 10 is operated by a static pressure controller due to the static pressure difference detected by the sensors 12 and 13 to open and close via the operation unit 10a. To be done.

A manual release device 11 is provided in the annex, and an electromagnetic clutch (not shown) in the annex other than the fire floor.
The mechanical interlocking operation of opening and closing the fire door and operating the air curtain can be blocked by opening the.

On the other hand, there is a disaster prevention center 22 that automatically detects the fire floor and is electrically connected to the breaking means on each floor, and opens the electromagnetic clutch (not shown) in the annex outside the fire floor. By doing so, it is possible to interrupt the mechanical interlocking operation of opening and closing the fire door and operating the air curtain.

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 that the air supply duct 9 is not supplied with pressurized air. The static pressure control damper 10 that controls the static pressure in the auxiliary chamber 1 is fully closed. On the other hand, ON-OFF for the air curtain that interlocks with the opening and closing of the fire doors 5 and 6 in the annex 1.
The damper 19a can mechanically open and close the air curtains 16 and 17 via the fire door opening / closing interlocking device 15 and the electromagnetic clutch 18.

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 means from the command from, the interlocking between the operation of the air curtains other than the fire floor (not shown) and the opening and closing of the fire door is 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 and / or the command from the disaster prevention center 22, and the pressurized air is supplied to the air supply duct 9. The static pressure control damper 10 is also started only on the fire floor based on the operation of the manual opening device 11 and / or a command from the disaster prevention center 22.

Therefore, when the fire doors 5 and 6 provided in the annex 1 on the fire floor are closed, the air curtain is turned on.
At the same time -OFF damper 19a is closed, the number static pressure Fushitsu 1 in the pressurized air supplied by the operation of the static pressure control damper 10a is compared to the corridor 3 side _mmH 2 O (e.g. 3~4mmH ₂ O) so that it is kept high.

The pressurized air supply amount in this case 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 controls the opening and closing of the static pressure control damper 10a. Then, the flow rate is adjusted to the minimum necessary amount of air that can maintain the static pressure in the auxiliary chamber 1.

If a fire spreads to the upper and lower floors, the manual opening device 11 or the disaster prevention center 22 gives a command (command means) to perform the same operation as described above to pressurize the antechamber on the fire floor. Good.

The static pressure in the annex 1 is slightly higher than that of the corridor 3 side (for example, 3 to 4) so that smoke does not enter from the corridor 3 side.
mmH ₂ O), the jet 20 of the air curtain tends to be pushed out of the annex 1, but in the present invention, the jet direction of the jet 20 is slightly inclined inward of the annex 1 with respect to the vertical plane. By doing so, as shown by the arrow in FIG. 2, the jet 20 can be pressed by the pressure in the auxiliary chamber 1 and curved while closing the opening of the auxiliary chamber 1.

In the unlikely event that a fire spreads to the upper and lower floors, the manual opening device 11 and / or the disaster prevention center 22 may be used to add a fire to the annex room on the fire floor, which has been spread by the same operation as described above. Can be pressed.

Since all the operating devices of the above-mentioned device can be operated within the range of the emergency power source capacity,
There is no need for a special power source or power. Moreover, since there is no damper for the fireproof section between the annex and the corridor, safety is high.

[0028]

[Embodiment 2] In Embodiment 1, the air curtains 16 and 17 were connected to the duct 9 and the air passage 21 for supplying air under pressure inside the auxiliary chamber 1, but in this embodiment, the air curtain 16 is used. , 17 are not connected to the duct 9, and air passages (not shown) dedicated to the air curtains 16 and 17 and a fan 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.

[0029]

EFFECTS OF THE INVENTION According to the present invention, pressurized air is not supplied to auxiliary rooms other than the fire floor, but compressed air is supplied only to the auxiliary rooms on the fire floor. The amount of power is reduced. As a result, it is possible to operate safely within the range of generally accepted emergency power supply capacity.

Further, even if the evacuee opens and closes the door of the attached room and opens and closes the door, the air curtain automatically operates in conjunction with the opening and closing, so the opening is blocked by the air curtain.
The attached chamber is maintained at a predetermined static pressure. This prevents smoke from entering the antechamber.

The amount of pressurized air supplied into the auxiliary chamber is minimized by the sensor detecting the static pressure difference between the inside and outside of the auxiliary chamber and automatically adjusting the amount. As a result, the amount of air supply is reduced to a fraction of that of the conventional device that supplies an average air flow regardless of whether the fire door is opened or closed, and power consumption and other adverse effects due to excessive air supply are prevented. To be done.

[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 showing a cross section of FIG.

[Explanation of symbols]

1 annex 3 corridors 4 staircase 5,6 fire door 7 fire wall 9 Air supply duct 10 Operation part 10a Static pressure control damper 11 Manual release device 12, 13 sensor 14 Static pressure controller 15 Fire door open interlocking machine 16,17 Air curtain 18 Electromagnetic clutch 19 Operation part 19a ON-OFF damper for air curtain 20 jets 21 wind path 22 Disaster Prevention Center

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) A62B 37/00

Claims (2)

(57) [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 command means for instructing the opening of the interlocking operation, a static pressure control damper for pressurizing and supplying air into the auxiliary room via the static pressure controller by the signal of the sensor that detects the static pressure difference between the auxiliary room and the corridor side, and the fire door An air curtain installed at the top that keeps the static pressure inside the antechamber when the fire door is opened and prevents smoke in the corridor from entering the annex, and the fire door opening and closing interlocking mechanism works to open and close the fire door. For air curtains that operate via an electromagnetic clutch An ON-OFF damper and an air supply duct that is connected to the attached room and the air curtain to supply air.
A pressurized air supply device for an auxiliary room of an emergency elevator, comprising an air supply fan that supplies air under pressure to an air supply duct. 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 command means for commanding the opening of the interlocking operation, a static pressure control damper for pressurizing and supplying air into the supplementary room via a static pressure controller in response to a signal from a sensor that detects the static pressure difference between the supplementary room and the corridor side. An air supply duct that connects and supplies air, an air supply fan that pressurizes and supplies air to the air supply duct, and a static pressure inside the attached room that is provided above the fire door when the fire door is opened and the corridor Side curtain to prevent smoke from entering the attached room and fire door ON for air curtain that operates via electromagnetic clutch in conjunction with opening / closing of fire door by motive
-OFF damper, an air supply duct connected to the air curtain for air supply, and an air supply fan for supplying air under pressure to the air supply duct. Qi device.