JP2001349591A - Pressurizing smokeproofing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent smoke leakage to an escape passage with a simplified construction without mechanical exhaustion of flue gas. SOLUTION: There are provided a living room 2 including a ceiling chamber 12, a passageway 3 communicating with the living room 2, an attached room 5 provided between the passageway and a stairs room 6, a balcony 7 formed around a window side in the foregoing living room, an exhaust chamber 14 formed on an upper portion of the balcony, a pressure escape hole 16 between the ceiling chamber and the exhaust chamber, and a pressurizing fan 19 connected with the foregoing attached room.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressurized smoke prevention system for preventing the diffusion of smoke generated in a living room by a fire in a building such as an office building or a hotel.

[0002]

2. Description of the Related Art Conventionally, in buildings such as office buildings and hotels, as a system for preventing smoke generated in a living room by a fire from flowing to a corridor or a staircase, air is supplied to an annex room between the corridor and the staircase. By applying pressure and mechanically evacuating smoke from the living room (fire room) using a smoke exhaust fan, a differential pressure between the corridor and the fire room was secured, preventing smoke from leaking into the corridor. However, this mechanical smoke exhaust system discharges a wide range of smoke in the living room, so the capacity of the smoke exhaust fan must be increased, which increases the cost. In addition, when the smoke exhaust temperature exceeds 280 ° C, the fire prevention damper is used. As a result, the smoke exhaust fan stops, so that the smoke layer in the fire room drops, the pressure rises, and the like, and there is a drawback that evacuation and firefighting activities are hindered.

In Japanese Patent Application Laid-Open No. 6-42785, in the event of a fire, the auxiliary room is supplied with air and pressurized and a pressure release port of the fire room is opened to open the room from a high pressure room to the corridor and from the corridor to the fire room. Generate an airflow that flows to
A system has been proposed to prevent the diffusion of smoke into corridors and annex rooms by forcing smoke into the fire room. In this system, an opening for heat exchange of a wall-through heat pump is used as the pressure relief port.

[0004]

However, in the above-mentioned conventional system, an opening for heat exchange of a wall-through heat pump is used as a pressure relief port, and the position of the opening is relatively low in the living room. Because of the location, there is a problem that a space where smoke exhaustion becomes difficult occurs due to the new installation or relocation of a room partition, and an evacuation route cannot be secured. Further, since the pressure release port is directly opened to the atmosphere, there is a problem in that the pressure release port is easily affected by wind pressure at the time of fire and smoke is not smoothly discharged.

The present invention solves the above-mentioned problem, and provides a pressurized smoke prevention system capable of preventing smoke leakage to an evacuation route for a long time with a simple configuration without performing mechanical smoke exhaustion. The purpose is to:

[0006]

For this purpose, a pressurized smoke suppression system according to the present invention comprises a living room having a ceiling chamber, a corridor communicating with the living room, and an annex room provided between the corridor and the staircase. A balcony formed around the window side of the living room, an exhaust chamber formed above the balcony, a pressure relief port provided between the ceiling chamber and the exhaust chamber, and connected to the auxiliary room. And a pressurizing fan.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show one embodiment of the pressurized smoke prevention system of the present invention, FIG. 1 is a schematic plan view, FIG. 2 is a cross-sectional view taken along line XX of FIG. 1, and FIG. It is an expanded sectional view of 2 balconies.

In FIG. 1, a living room 2, a corridor (including an elevator hall) 3, an elevator shaft 4, an annex room 5 adjacent to a stair room 6, and the like are provided inside a building 1. Is provided with a balcony 7. A conference room 9 is provided at a corner of the living room 2.

In FIG. 2, a ceiling board 10 is disposed above the living room 2, a ceiling chamber 12 is formed between the ceiling board 12 and the upper floor slab 11, and a plurality of suction ports 12a are formed in the ceiling chamber 12. I have. As shown in FIG. 3, a waist wall 7a is formed at the lower part of the balcony 7, and a vertical wall 7b is formed at the upper part.
Are formed. A partition board 13 is provided between the vertical wall 7b and the outer wall 15, and an exhaust chamber 14 is formed between the partition board 13 and the upper floor balcony 7. The partition board 13 has a plurality of exhaust ports 13a. In FIG. 3, reference numeral 21 denotes a window.

[0010] A plurality of pressure relief ports 16 for connecting the ceiling chamber 12 and the exhaust chamber 14 are provided in the outer wall 15 on three sides of the window of the living room 2.
6a is provided. The damper 16a is normally closed. A pressurizing fan 19 is connected to the auxiliary room 5. In addition, between annex room 5 and corridor 3,
A relief damper 20 is provided which opens when the pressure exceeds a predetermined value.

In the above configuration, in the event of a fire in the living room 4,
The damper 12 is opened by the fire detector and the ceiling chamber 12 is opened.
To the atmosphere via the exhaust chamber 14,
The pressurizing fan 19 is operated. Due to this, due to the pressure difference between the annex room 5 and the atmosphere, the pressurized level of each room is as high as +++ in the annex room 5, slightly higher in the corridor 3 as +, and ± in the staircase room 6 and the living room 2 and the pressure level is more Lower. Therefore, the air pressurized in the annex room 5 enters the living room 2 through the corridor 3 and enters the living room 2.
The air rises inside and is discharged from the ceiling chamber 12 to the atmosphere through the pressure relief port 16, the exhaust chamber 14, and the exhaust port 13a. At this time, the smoke generated in the living room 2 quickly rises, is introduced into the ceiling chamber 12, and is discharged to the atmosphere via the pressure relief port 16.

[0012]

As is apparent from the above description, according to the present invention, since smoke is not discharged mechanically, smoke is continuously discharged even when the temperature of the smoke exceeds a predetermined value. It is possible to prevent smoke descent and smoke leakage to evacuation routes such as corridors and annex rooms for a long time. In addition, since the ceiling chamber is used as a smoke exhaust path, the partition of the living room can be freely changed.Furthermore, there is no need for a smoke exhaust duct space. Since a vertical shaft for smoke exhaust and a smokeproof vertical wall are not required, the floor area can be increased. Furthermore, since smoke is exhausted from the exhaust chamber of the balcony, the influence of wind pressure can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing one embodiment of a pressurized smoke prevention system of the present invention.

FIG. 2 is a cross-sectional view taken along line XX of FIG.

FIG. 3 is an enlarged sectional view of the balcony of FIG. 2;

[Explanation of symbols]

 2 ... living room 3 ... corridor 5 ... annex room 6 ... staircase room 7 ... balcony 12 ... ceiling chamber 14 ... exhaust chamber 16 ... pressure relief port 19 ... pressurized fan

Claims (1)

[Claims] 1. A living room having a ceiling chamber, a corridor communicating with the living room, an annex room provided between the corridor and the staircase, a balcony formed around a window side of the living room, and the balcony An exhaust chamber formed at the top of the
A pressurized smoke prevention system comprising: a pressure relief port provided between the ceiling chamber and the exhaust chamber; and a pressurized fan connected to the auxiliary room.