JPH11294823A - Exhaust gas system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the leaked smoke to an evacuation path for a long time without performing mechanical smoke exhaust, by providing an exhaust gas system with a living room having a ceiling chamber, a corridor led to the living room, an annexed room and a stairs room, a pressure release port made at the outer wall of the ceiling chamber, and a pressurizing fan connected to the annexed room. SOLUTION: This system is provided with a living room 4, a corridor 5, an annexed room 6, and a stairs room 7 between the ground floor slab 2 and the top floor slab 3 of a multistoried building. A ceiling board 8 is arranged in the living room 4, and a ceiling chamber 9 is made between it and the top floor slab 3. What is more, many suction ports are made in the ceiling chamber 9. The outer wall 10 is provided with a pressure release port 11, and this pressure release port 11 is connected to the ceiling chamber 9 through a damper 12. What is more, usually the damper 12 is closed. Then, a pressurizing fan 13 is connected to the annexed room 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of countermeasures against smoke emission in a fire in a high-rise building such as an office building or a hotel.

[0002]

2. Description of the Related Art Conventionally, in a high-rise building such as an office building or a hotel, as a system for preventing smoke from flowing into a corridor or a staircase in the event of a fire, an air supply is pressurized in an annex room between the corridor and the staircase. Mechanical smoke was exhausted from the living room (fire room) by a smoke exhaust fan to secure a pressure difference between the corridor and the fire room, thereby preventing smoke leakage into the corridor.

[0003]

However, the above-mentioned conventional mechanical smoke exhaust system emits a wide range of smoke in the living room, so the capacity of the smoke exhaust fan must be increased, and the cost increases. If the flue gas temperature exceeds 280 ° C, the fire prevention damper will shut down and the flue gas fan will stop, causing a drop in the smoke layer of the fire room and an increase in pressure, which may cause problems in evacuation and fire fighting activities. Have.

The present invention has been made to solve the above-described problem, and it is possible to prevent smoke leakage to an evacuation route for a long time with a simple structure without performing mechanical smoke emission, and to improve the evacuation safety. It aims to provide a smoke system.

[0005]

For this purpose, a smoke exhaust system according to the present invention comprises a living room 4 having a ceiling chamber 9, a corridor 5, an annex room 6, and a staircase room 7 communicating with the living room. Pressure relief port 11 formed in outer wall 10
And a pressurizing fan 13 connected to the attachment room 6. The number added to the above configuration is
The drawings are to be compared with the drawings to facilitate understanding of the present invention, and the present invention is not limited thereto.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing one embodiment of the smoke exhaust system of the present invention, and FIG. 2 is a diagram for explaining the effects of the present invention.

In FIG. 1A, between a lower slab 2 and an upper slab 3 of a high-rise building 1, a living room 4, a corridor 5, an annex room 6, and a stair room 7 are provided. A ceiling board 8 is provided in the living room 4, and a ceiling chamber 9 is provided between the living room 4 and the upper floor slab 3.
Are formed. The ceiling chamber 9 has a plurality of suction ports. A pressure relief port 11 is provided on the outer wall 10, and the pressure relief port 11 is connected to the ceiling chamber 9 via a damper 12. The damper 12 is normally closed. A pressurizing fan 13 is connected to the auxiliary room 6.

In the above configuration, when the living room 4 fires,
The damper 12 is opened to communicate the ceiling chamber 9 with the outside air, and the pressurizing fan 13 is operated. Due to this, the pressure level of each room is increased by the differential pressure between the auxiliary room 6 and the outside air.
Is high as +++, the corridor 5 is slightly higher at +, and the staircase 7 and the living room 4 are ± at lower levels. Therefore, the air pressurized in the annex room 6 enters the living room 4 through the corridor 5, and
It rises inside the living room 4 and is discharged from the ceiling chamber 9 to the outside air through the pressure release port 11. At this time, the smoke S generated in the living room 4 quickly rises and is introduced into the ceiling chamber 9, and the smoke in the ceiling chamber 9 is released from the pressure release port 11.
And is discharged to the outside air.

FIG. 2 shows the time course of the smoke layer height of the fire room between the smoke exhaust system of the present invention and the conventional mechanical smoke exhaust system. In the conventional mechanical smoke exhaust system, when the smoke exhaust temperature exceeds 280 ° C., the smoke exhaust fan stops, and the smoke layer in the fire room drops. On the other hand, in the smoke exhaust system of the present invention, Because the smoke layer height does not drop,
Evacuation safety is ensured for a long time.

[0010]

As is apparent from the above description, according to the present invention, smoke is continuously discharged even when the smoke discharge temperature exceeds a predetermined value. It is possible to prevent smoke from leaking into the evacuation route for a long time and improve evacuation safety. In addition, since no smoke exhaust duct space is required, space efficiency of the office can be improved, and a clean office without smoke-proof vertical walls can be provided. No change is required. In addition, a pressure fan,
Since a simple smoke exhaust system is provided by the pressure relief port, maintenance costs can be reduced as compared with a conventional mechanical smoke exhaust system.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of a smoke exhaust system of the present invention.

FIG. 2 is a diagram for explaining an effect of the present invention.

[Explanation of symbols]

 4 ... living room 5 ... corridor 6 ... auxiliary room 7 ... staircase room 9 ... ceiling chamber 10 ... outer wall 11 ... pressure relief port 13 ... pressurized fan

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuto Nakamura 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation

Claims (1)

[Claims] 1. A living room having a ceiling chamber, a corridor, a vestibule room, and a staircase room communicating with the living room, a pressure relief port formed in an outer wall of the ceiling chamber, and a pressurization connected to the vestibule room. A smoke exhaust system comprising a fan.