JPH0716528B2 - Automatic fire extinguishing equipment for double floor structure computer room - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixed type gas fire extinguishing facility. More specifically, an automatic fire extinguishing system for a double-floor computer room with multiple cubicles accommodating computers and related equipment such as data processors, disk drives, and power supplies on the floor of the double-floor structure. It is about.

[0002]

2. Description of the Related Art When constructing a large-scale electronic computer system, a dedicated computer room is provided in one part of a building, in which an electronic computer such as a data processing device, a disk drive device, a power supply device and related equipment are installed. A plurality of stored cubicles are installed, and all of the plurality of cubicles are electrically and organically connected to operate. Since expensive equipment and valuable software are concentrated in the computer room,
When it comes to disaster prevention, extremely high levels of reliability, certainty and safety are required. Therefore, the computer room is equipped with fixed fire extinguishing equipment to prevent damage in the unlikely event of a fire, but this fire extinguishing equipment is neither damaged nor contaminated by extinguishing agents. There was no fire extinguishing agent that was safe for human life, and it was arranged to radiate this into the entire computer room including the inside of the double floor.

[0003]

However, with the recent problem of depletion of the ozone layer due to CFC-based gases, a useful fire extinguisher, a halide fire extinguishing agent, is in a situation of being severely restricted in its use, and as an essential use. ,
Even when using halide fire extinguishing agents in electronic calculators, the total amount used has been significantly limited. Therefore, the fire extinguishing equipment for the electronic computer room has been obliged not to use a halide fire extinguisher, or to use an extremely small amount, or to use other gas-based fire extinguishing agents such as carbon dioxide. However, using a small amount of extinguishant has no effect on extinguishing the fire, while the use of carbon dioxide poses a problem in terms of safety for humans in case of accidental release.

[0004]

DISCLOSURE OF THE INVENTION The present invention is a first gas system in which carbon dioxide, a halide or other gas-based fire extinguishing agent is used for each of a plurality of cubicles installed in a computer room having a double floor structure. A second gas-based fire extinguishing facility that installs a fire-extinguishing facility and uses a gas-based extinguishing agent such as carbon dioxide, a halide, or the like, which protects the entire space inside the double floor, different from the first gas-based fire extinguisher In case of fire, the fire extinguishing agent will be automatically discharged from the first gas system fire extinguishing equipment to each cubicle.
Alternatively, prior to this, the fire extinguishing agent may be automatically discharged from the second gas fire extinguishing equipment into the double floor. The second invention of the present application is the above-mentioned first invention, wherein each cubicle is provided with a means for closing the vent hole of the cubicle in association with the release of the extinguishing agent, so that the space inside the cubicle and the double floor is increased. Extinguish the fire more effectively.

[0005]

First, the basic principle of the present invention will be described. A general computer room has a double-floor, so-called free access structure. Air for cooling is sent from an external air conditioner into this double-floor, and ventilation is provided at the key points of the double-floor. Place individual cubicles directly above the openings in. A small ventilation fan is installed on the ceiling of the cubicle according to the size of the cubicle, and the cooling air introduced from the double floor into the cubicle is discharged into the computer room outside the cubicle. To do. The air in the computer room has a cooling circulation cycle in which it is sucked by a ventilation duct provided near the ceiling, returned to the air conditioner, cooled, and sent again into the double floor. In the above configuration, the risk of fire is due to the ventilation to connect the inside of the cubicle that houses the computer such as the data processing device, the disk drive device, the power supply device and its related equipment, and these cubicles. It is particularly remarkable in the wiring cable that is stretched around the double floor through the opening. Therefore, as the fire extinguishing equipment, the cubicle in which the fire has occurred and the entire interior of the double floor are configured to be filled with the fire extinguishing agent at the same time, whereby the initial purpose can be achieved. In addition, the automatic start of the fire extinguishing equipment is a fire signal by a smoke sensor installed in the computer room,
A with signals from fire sensors in individual cubicles
By setting the ND condition, it is possible to prevent a malfunction that is often caused by a signal from the smoke sensor only. In this case, the fire extinguishing equipment is activated to release the fire extinguishing agent on the lower side of the double floor, and then at the same time as or slightly later, the fire extinguishing agent is released only to the cubicle where the fire actually occurs. It is configured not to be released into the cubicle of. If it is not desirable to release the fire extinguishing agent unexpectedly, such as when there is a person in the computer room, a changeover switch is provided to prevent it from being automatically released in conjunction with the fire sensor. Remove the interlocking of, and enable the automatic start with the start push button switch. This allows
In case of fire, the room is filled with smoke,
Or, if the cubicle where the fire broke out cannot be identified because the room is large, you can operate the start pushbutton switch located in a safe place away from the cubicle, and the AN of the signal and the signal from the fire sensor in the cubicle will be displayed.
The fire extinguishing agent is automatically discharged depending on the condition D.

The present invention will be described in detail below with reference to FIG. 1 showing an embodiment of the present invention. The computer room 1 has a double floor 2 on the floor. An opening 3 is opened at an important part of the double floor 2, and air can flow through each other in the double floor internal space 4 through the opening 3. The adjacent room 5 also has a double-floor structure, has a double-floor internal space 4 in common with the computer room 1, and also has an opening 3A on the floor. An air conditioner 6 is installed directly above the opening 3A.
The cooling air is sent out from the bottom of the. A ventilation duct 7 is connected to the air intake port side of the air conditioner 6 and extends near the ceiling of the computer room 1, and air intake ports 8, 8, ... There is. The openings 3, 3, 3, ... of the double floor 2 of the computer room 1
.. A plurality of cubicles 9 respectively accommodating electronic computers such as a data processing device, a disk drive device, a power supply device and related equipments are installed directly above, and the plurality of cubicles 9-1, 9-2, 9-3. The cooling air can be taken in from the bottom of each of 9-N. Further, fans 10-1, 10-2, 10-3, ... 10-N are attached to the upper part of the cubicle 9 to constantly discharge the internal air to the outside of the cubicle 9,
The cooling air taken in from the bottom is constantly replaced. According to the above description, the flow of air in the electronic computer cooling system is as shown by the arrow in FIG. Individual cubicles 9-1, 9-2, 9-
3 ... 9-N fire extinguishing equipment includes storage containers 11-1, 11-2, 11-3, ... 11-N filled with carbon dioxide, halides, and other gas-based fire extinguishing agents. At the top, container valves 12-1, 12-2, 12-3, ... 12
-N is attached, and the solenoid valve for opening the container valve is attached to the container valve.
3-1, 13-2, 13-3, ... 13-N are attached to the cases 14-1, 14-2, 14-3, ...
・ Incorporated into 14-N, fixed to a cubicle, and using short piping, cubicles 9-1, 9-2, 9-3, ...
In the 9-N, the ejection heads 16-1, 16-2, 16-3,
... By exposing 16-N, a cubicle fire extinguishing system (first gas system fire extinguishing equipment) is constructed. As for the fire extinguishing equipment of the double-floor internal space 4, as with the cubicle, a container valve 18 is attached to the top of a storage container 17 filled with carbon dioxide, a halide, and other gas-based fire extinguishing agents, and those for opening these container valves are used. Wearing the dod 19 and the container valve 18
The double floor internal space 4 by extending the pipe 20 connected to the outlet of
The fire extinguishing system for the double-bed internal space is configured by connecting the plurality of jet heads 21, 21 ... 2 gas fire extinguishing equipment) will be constructed.

Next, an automatic fire extinguishing system will be described. Computer room 1 as a device for detecting fire
, Are arranged near the ceiling of the computer, and the smoke sensor 22 is electrically connected to a control panel 24 installed in a safe place outside the computer room 1 through an electric wire (not shown). Connect to. The push button switch 25 is also provided so that a start signal from the push button switch 25, which is also attached to a safe place outside the computer room 1, can be received.
An electric wire (not shown) is connected to the control panel 24. In the cubicle 9, fire sensors 23-1, 23-2, 23-3, ... 23 that detect smoke, heat, flames, etc. associated with a fire.
-N is attached and the fire sensor 23 is an electric wire (not shown)
Each cubicle 9 is connected to the control panel 25 via
The fire signals in -1, 9-2, 9-3, ... 9-N are sent to the control panel 25. Smoke sensors 22, 22, ... Or push button switch 2 in computer room 1
The activation signal by 5 is also sent via the electric wire (not shown) to the solenoid valves 13-1, 13-2, 13-3, ... 13-N for opening the container valves of the individual fire extinguishing equipment for cubicles.
Also, it is connected to the container valve opening solenoid 19 of the storage container 17 of the fire extinguishing equipment (second gas system fire extinguishing equipment) in the double-bed internal space 4.

[0008] Next, the operation procedure of the fire extinguishing equipment
This will be described with reference to the wiring diagram of FIG. When a fire occurs in the double-floor internal space 4 or any cubicle, for example, the cubicle 9-1, smoke or flames accompanying the fire are treated as the cubicle 9-1 and the computer room 1 is operated through the fan 10-1. It flows into the inside, and as a result, the cubicle 9-
The fire sensor 23-1 in 1 and any fire sensor 22 in the computer room 1 operate. Fire sensor 2
When the relay 2 is activated, the relay F0 and the fire sensor 23-
When 1 is activated, the relay F1 is excited and the respective contacts f0 and f1 are closed, which causes the cubicle 9
-1 of the container valve opening solenoid 13-1 and the container valve opening solenoid 19 of the double floor internal space 4 are operated. The storage container 11-1 and the storage container 1 are operated by the operation of the solenoid.
The fire extinguishing agent released from 7 is the pipe 15-1 and the pipe 18.
And the ejection head 16-1 and the ejection heads 21 and 2.
After 1 and so on, the cubicle 9-1 and the double-floor internal space 4 are respectively filled and the fire is extinguished. Further, due to the closed circuit of the relay contacts f0 and f1, the air conditioner is stopped at the same time when the fire extinguishing equipment is started, and the air flow in the computer room 1 is stopped. The above is the description of the automatic activation by the fire sensor. However, when it is not preferable that the fire extinguishing agent is unexpectedly released when there is a person in the room, the changeover switch 26 is set to the outdoor safe place. It is installed so that the automatic operation by interlocking with the fire sensor and the manual activation by the push button switch 25 can be switched appropriately.
This is because when the changeover switch 26 is switched to the fire sensor side as shown in FIG. 2, the fire interlocking lamp 27 is turned on and the relay contacts f0 and f1, f2, f3, ... 1, 11-2, 1
1-3, ..., 11-N are activated, or when the push button is switched to the push button side as shown in FIG. 3, the push button starting lamp 28 is turned on and the relay contacts f0 and f1, f2,
f3, ..., fN are separated so that only the push button can be activated, and the fire interlocking lamp 27 and the push button activation lamp 28 can be used to know which state the fire extinguishing equipment is currently in. If a fire occurs while the changeover switch 26 is being switched to the push button side, such as when there is a person in the room, the fire sensor 2 can be operated in the same manner as above.
2 and 23-1 are actuated to operate the relay contacts f0 and f1.
Is excited and the relay contacts f0 and f1 are closed, but the fire extinguishing equipment does not start. In this case, by pushing the push button switch 25, the solenoids 13-1 and 19 for opening the container valve are operated. . Thereafter, as in the above, the extinguishing agent is released to achieve extinguishing.

Next, the reason why the first gas fire extinguishing equipment for the cubicle 9 is started at the same time as the second gas fire extinguishing equipment for the double-floor interior space 4 or after a short delay will be explained. The first is that in the cubicle, a combustible material called a cable for computer wiring, which is connected to the double-floor internal space 4, there is a high possibility that both of them will spread to the fire, especially if a fire occurs on the cable side. Is. The second is
Even if there is a fire only on the cubicle side, it is extremely advantageous to discharge the fire extinguishing agent into the double-floor interior space 4 apart from the preventive measures such as the first one. The reason for this is explained below. Generally, a data processing device,
In a cubicle accommodating an electronic computer such as a disk drive device and a power supply device and its related equipment, the air flow can be modeled as shown in FIG. In the cubicle housing 30, a gap 29 of the ventilation fan 10 is provided on the upper side, and an opening 31 is provided on the bottom portion so as to face the opening 3 of the double floor.
However, on the side surface, there are small holes 32 such as doors for inspection of cubicle equipment (not shown) and heat-dissipating meshes, and the overall airtightness is low. Carbon dioxide,
If a gas-based fire extinguisher that is heavier than air, such as a halide, is used, even if the fire extinguishing agent is released at a considerably large release rate, a large amount of the fire extinguishing agent escapes downward from the opening 31 at the bottom. Is difficult to do. That is, when the extinguishing agent is discharged from the jet head 16 in FIG. 4, the extinguishing agent flows out from the bottom opening 31 of the housing 30 and the opening 3 of the double floor in a flow as shown by the arrow in the figure, and the flow is double. It does not stop until the floor space 4 is filled with extinguishant. On the other hand, if the extinguishing agent is discharged to the double-floor internal space 4 at the same time as or prior to the cubicle 9 as in this system, the extinguishing agent leaking from the cubicle 9 to the outside is only from the small hole 32. Moreover, since these are located sufficiently above the bottom, a very small amount is required as compared with the leakage from the bottom 31.

If the gap 29 of the upper opening fan 10 is considerably larger than the other openings, the inflow of outside air into the cubicle 9 cannot be ignored, and in this case, as shown in FIG. A ventilation hole closing device 33 is provided to block the flow of air. The ventilation hole closing device 33 is based on a known example, and in the example of FIG.
The structure is such that it rotates in the direction of the arrow in the drawing around the center and abuts against the frame 36 to block ventilation, and the ventilation hole closing device 33
Since it operates electrically or by gas pressure, it is always open as shown. Fire sensor 2 for electricity
It shall be closed upon receiving the signal 2 and in the case of the gas pressure type, it shall be closed upon receiving the pressure when the extinguishing agent is released. Next, the cubicles 9-1 and 9- of the first gas fire extinguishing equipment, respectively.
2, 9-3, ... 9-N, the method of releasing the extinguishing agent to the double-bed internal space 4 of the second gas-based fire extinguishing equipment in advance will be described. In this case, the fire extinguishing equipment is controlled by the wiring diagram as shown in FIG. When a fire occurs, any one of the fire sensors 22, 22, ... And the fire sensors 23-1, 23-2, 23-3 ,.
23-N is activated, which causes relay F0
And one of F1, F2, F3 ... FN is excited. When the relay is energized, relay contacts f0 and f
Since f1, f2, f3, ... fN are closed, the timer TM starts operating. With the operation of the timer TM, the relay contact tm is closed with a delay of the set timing, and the container valve opening solenoids 13-1 and 13 of the first gas system fire extinguishing facility are closed.
-2, 13-3, ... 13-N, relay contact f
The container valve opening solenoid 13 in which 1, f2, f3, ..., fN are closed operates to release the fire extinguishing agent. That is,
Container valve opening solenoids 13-1, 13-2, 13-for the container valve opening solenoid 19 of the second gas system fire extinguishing equipment
3 ... 13-N is operated by the operation of the timer TM with a delay by the set timing, so that the second gas system fire extinguishing equipment for the double floor internal space 4 is the first gas system fire extinguishing equipment for the cubicle 9. The extinguishing agent is released prior to the timing set by the timer TM.

[0011]

According to the present invention, since the fire extinguishing agent fills the localized areas in the cubicle and the double floor, the amount of the extinguishing agent required for extinguishing the fire is extremely small as compared with the conventional one, for example, 10 minutes. It can be reduced to about 1 of
Even if accidentally the fire extinguisher malfunctions and the fire extinguishing agent is released and leaks into the computer room, it is safe for the human body due to its low concentration. And can be completely extinguished by discharging into the double floor. According to the second invention of the present application, when the fire is extinguished, the ventilation hole of the cubicle to be extinguished is closed, so that the fire extinguishing agent can be effectively used and complete extinction can be achieved more quickly.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing the outline of automatic fire extinguishing equipment in a double-floor computer room in which the present invention is implemented.

FIG. 2 is a wiring diagram showing the operation control circuit of the fire extinguishing equipment with the changeover switch in the automatic state.

FIG. 3 is a wiring diagram showing the operation control circuit of the fire extinguishing equipment with the changeover switch being in a manual state

FIG. 4 is a vertical cross-sectional view showing the flow of airflow in a cubicle.

FIG. 5 is a vertical sectional view of a ventilation hole closing device.

FIG. 6 is a wiring diagram of an operation control circuit of the fire extinguisher equipped with a timer to operate the second gas fire extinguisher ahead of the first gas fire extinguishing equipment.

[Explanation of symbols]

 1 Computer Room 2 Double Floor 9 Cubicles 13 Container Valve Opening Solenoid (First Gas System Fire Extinguishing Equipment) 19 Container Valve Opening Solenoid (Second Gas System Fire Extinguishing Equipment) 33 Vent Hole Closing Device

Claims (4)

[Claims] 1. A double-floor computer room in which a plurality of cubicles accommodating a computer such as a data processing device, a disk drive device, a power supply device and related equipment are installed on the floor of the double-floor structure, The first gas-based fire extinguishing equipment that uses carbon dioxide, halides and other gas-based fire extinguishing agents is installed in each of the cubicles, and the entire space in the double floor different from the first gas-based fire extinguishing equipment is installed. If a second gas-based fire extinguishing facility that uses carbon dioxide, a halide, or other gas-based fire extinguishing agent to protect the environment is installed, and if a fire occurs, the extinguishing agent will automatically The double floor structure characterized in that the fire extinguishing agent is automatically discharged from the second gas-based fire extinguishing equipment into the double floor at the same time as or prior to this. Automatic fire-extinguishing system of the computer room. 2. Means for automatically releasing the extinguishing agent,
The double floor structure according to claim 1, which is activated by an AND condition of a signal from a smoke sensor that detects smoke in the computer room and a signal from a sensor that detects a fire in each cubicle. Automatic fire extinguishing equipment 3. Means for automatically releasing the extinguishing agent,
The double-floor structure of a computer room according to claim 1, which is activated by an AND condition of a signal from a start switch located away from the cubicle and a signal from a sensor for detecting a fire in each cubicle. Automatic fire extinguishing equipment 4. A double-floor computer room in which a plurality of cubicles accommodating a computer such as a data processing device, a disk drive device, a power supply device, and related equipment are installed on the floor of the double-floor structure, Each cubicle is equipped with a first gas-based fire extinguishing equipment that uses carbon dioxide, halides and other gas-based extinguishing agents, and the entire space in the double floor separate from the first gas-based fire extinguishing equipment is installed. If a second gas-based fire extinguishing system that uses carbon dioxide, a halide, or other gas-based fire extinguishing agent to protect is installed, in the event of a fire, each cubicle will automatically be extinguished from the first gas-based fire extinguisher. Along with this, the extinguishant can be automatically released from the second gas system fire extinguishing equipment into the double floor at the same time as or prior to this.
An automatic fire extinguishing system for a double-floor computer room, characterized in that each cubicle is provided with means for closing the vent holes of the cubicle when the extinguishing agent is released.