JPH09215766A - Fire extinction system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To find a fire in an early stage, immediately extinguish the fire and minimize water loss by tire extinguisher by providing plural smoke sensing means and discharging the fire extinguisher in the case of receiving smoke detection signals from the plural smoke sensing means. SOLUTION: Plural smoke sensors 30 provided near the ceiling of a fire extinction object area are provided and connected through a signal line to a controller 31. Also, a first solenoid valve 17 for activation, second solenoid valves 24a, 24b and 24c for activation, a pressure air tank 10 for activation and a pump device 3 for fire extinction are also connected through the signal line to the controller 31 and the controller 31 is connected through the signal line to a fire alarming device 32. In this case, the controller 31 originates discharge signals and discharges the fire extinguisher in the case of receiving the smoke detection signals from the at least two smoke sensors 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire extinguishing system, and more particularly to a fire extinguishing system capable of extinguishing a fire early, causing no malfunction, and minimizing water loss.

[0002]

2. Description of the Related Art As conventional fire extinguishing systems, water bubble type extinguishing equipment, powder / gas type extinguishing equipment and the like are known.

A sprinkler fire extinguisher is a typical example of the water bubble type fire extinguishing equipment. This sprinkler fire extinguisher uses water or foam as a fire extinguisher, and a plurality of sprinkler heads are arranged on a pipe attached to a ceiling or the like. This sprinkler head has a fusible part (deflector) which is melted by heat, and when a fire occurs and the temperature rises, the fusible part is melted or destroyed. When the soluble portion is dissolved, water or bubbles that are constantly pressurized in the pipe are released from the sprinkler head and automatically digested. In other words, this sprinkler fire extinguisher system, after a fire occurs and its flame reaches the ceiling,
The heat of the flame causes the fusible portion of the sprinkler head to melt and operate.

Further, the powder / gas fire extinguishing equipment uses powder or gas as an extinguishing agent. This fire extinguishing facility is used for extinguishing in a space having a certain degree of airtightness because powder and gas are used as extinguishing agents. Specifically, it is used in computer rooms, underground parking lots, electric rooms, etc.

[0005]

However, the above-described conventional sprinkler extinguishing system operates because the flame from the fire reaches the ceiling and the fusible part of the sprinkler head melts. There may already be a widespread fire at that time. In such a case, even if the sprinkler fire extinguisher is successfully operated to extinguish the fire, the damage caused by the fire will be great, especially when expensive products are stored or manufactured in the fire extinguishing area. The damage is immeasurable. In addition, a sprinkler fire extinguishing system of the simultaneous opening type, that is, 1
In the case of a sprinkler fire extinguisher of the type in which one sprinkler head activates when all other sprinkler heads operate, water will also be radiated to the products etc. that have not spread to the fire, and the damage (water damage) ) Has the problem of expanding.

Further, when a substance that is difficult to extinguish once it is ignited exists in the extinguishing target area, it is necessary to operate the extinguishing device before the flame is generated. However, as described above, the conventional sprinkler extinguishing system cannot operate unless a flame is generated, and therefore cannot be applied to an area where such a substance that is hard to extinguish exists. In particular, in the case of a material that is extremely flammable, the rate of spread of fire becomes extremely high, and the conventional sprinkler fire extinguisher may cause serious damage to the fire.

Further, the conventional sprinkler extinguishing system is
Since the sprinkler head is always filled with the pressurized extinguishant, if the sprinkler head is damaged due to some cause other than a fire, the pressurized extinguishant may be released. If the extinguishing agent is released due to the malfunction of the sprinkler fire extinguisher in this way, the products etc. in the fire extinguishing area will be damaged due to water damage, etc. The damage will be huge.

Further, in the conventional powder / gas fire extinguishing equipment, since powder or gas is used as the extinguishing agent, its application is not limited to the airtight space, and handling of the extinguishing agent is extremely inconvenient. There's a problem.

Further, in order to achieve early detection and early extinguishing of a fire, a method is provided in which a plurality of smoke detectors are provided in a fire extinguishing target area and a smoke detection signal from these smoke detectors is used to operate a fire extinguishing facility. Can be considered. For example, as shown in FIG. 6, a plurality of radiation areas d1 forming the fire extinguishing area D,
One smoke detector 100 is provided in each of d2, d3, and d4. Then, smoke is generated from the fire occurrence point P, and when any of the four smoke detectors 100 detects this smoke, a smoke detection signal is transmitted. If a smoke detection signal is issued, then Fig. 7
As shown in FIG. 5, all the plurality of discharge heads 101 provided in the fire-extinguishing target area D are operated to activate the fire-extinguishing target area D.
Of the extinguishing agent to all of the radiation areas d1, d2, d3, d4. However, this method has a problem in that the extinguishing agent is also released to the non-fire spread portion other than the fire occurrence point P, and all the products in the fire extinguishing target area D are damaged by water. Further, even if the smoke detector 100 emits a smoke detection signal due to a malfunction, the extinguishing agent is released, which may cause water damage.

Therefore, an object of the present invention is to solve the above-mentioned various problems, to detect a fire early and to extinguish it immediately, to minimize water loss due to extinguishing agent, and to prevent malfunction. It is to provide a fire extinguishing system that can reliably prevent water loss due to water.

[0011]

According to a first aspect of the present invention, there is provided a fire extinguishing system comprising a plurality of smoke detecting means for emitting a smoke detection signal when smoke is detected, and at least two smoke detecting means for detecting smoke. It is characterized by comprising a control means for transmitting a release signal when a signal is received, and a fire extinguishing means for operating in response to the release signal to release the extinguishing agent.

In the fire-extinguishing system according to the second aspect of the present invention, the control means includes a first control means for transmitting a standby signal when receiving a smoke detection signal from any one of the smoke detection means, and Second control means for emitting a discharge signal when a smoke detection signal from any one of the smoke detection means is received, and the extinguishing means includes a transportation line for transporting an extinguishing agent, and the transportation line. It is provided in the middle of the line,
First valve means opened in response to the standby signal, and provided in the transportation line downstream of the first valve means,
A second valve means that opens in response to the release signal.

In a fire extinguishing system according to a third aspect of the present invention, the fire extinguishing system includes a discriminating means for identifying a smoke sensing means that has emitted a smoke detection signal, and a plurality of radiation areas forming a fire extinguishing target area of the fire extinguishing system. A plurality of smoke detectors are provided for each of the plurality of smoke detectors, the transport line downstream of the first valve means is branched to form a plurality of branch lines, and each of the plurality of branch lines includes the second branch line. Valve means is provided to distribute the plurality of branch lines to the plurality of radiant zones, and the second control means receives smoke detection signals from at least two smoke sensing means provided in a common radiant zone. In this case, the emission signal is transmitted to the second valve means of the branch line distributed to the common radiation area.

In the fire-extinguishing system according to the present invention, the control means includes a number-of-times calculating means for calculating the number of times of transmission of the emission signal and a number-of-times setting means for setting a maximum value of the number of times of transmission. The emission signal is not transmitted when the number of transmissions reaches the maximum value.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION First Embodiment A first embodiment of a fire extinguishing system according to the present invention will be described below with reference to FIGS. 1 to 4. FIG. 1 is a schematic system diagram of a fire extinguishing system according to the present embodiment. In FIG. 1, reference numeral 1 is an extinguishant storage tank having an extinguishing agent stored therein. Here, as the extinguishing agent, water, a foaming agent such as a foaming agent is used. For example, when the extinguishing target is an oil fire such as gasoline, the foaming agent is used.

The inlet end of the suction pipe 2 is immersed in the extinguishant in the extinguishant storage tank 1, and the outlet end of the suction pipe 2 is connected to the fire extinguishing pump device 3. The fire extinguishing pump device 3 includes the extinguishant storage tank 1
An inlet end of a discharge pipe 4 that discharges the extinguishing agent sucked up from is connected. A sluice valve 5 is provided in the middle of the discharge pipe 4, and the sluice valve 5 is always open.
A check valve 6 is provided on the upstream side of the sluice valve 5 (on the side of the fire extinguishing pump device 3), and the check valve 6 prevents backflow of the extinguishing agent from the downstream side to the upstream side. A priming tank 8 is connected to a discharge pipe 4 between the check valve 6 and the fire extinguishing pump device 3 via a branch pipe 7. In addition, a starting pressure air tank 10 is connected to a discharge pipe 4 downstream of the sluice valve 5 via a shunt pipe 9, and a sluice valve 11 that is always open is provided in the middle of the shunt pipe 9. It is provided.

A first valve device 12 is provided at the outlet end of the discharge pipe 4, and the first valve device 12 has a sluice valve 13 which is always open, and a sluice valve 13 is provided downstream of the sluice valve 13. Is provided with an alarm valve 14 for detecting running water. A first simultaneous release valve 15 is provided further downstream of the alarm valve 14.
Is provided, and one end of a first starting pipe 16 branched from the discharge pipe 4 is connected to the first simultaneous opening valve 15. In the middle of the first starting pipe 16, there is provided a first starting solenoid valve 17 that opens when the first simultaneous opening valve 15 is operated.

The inlet end of the transportation pipe 18 is connected to the outlet side of the first simultaneous opening valve 15, and a normally open gate valve 19 is provided in the middle of the transportation pipe 18. A test circuit 20 is provided in the transportation pipe 18 between the gate valve 19 and the first simultaneous opening valve 15.

Three branch pipes 21a, 21b, 21c are connected to the transport pipe 18 downstream of the sluice valve 19, and the second simultaneous open valve is provided in the middle of these branch pipes 21a, 21b, 21c. 22a, 22b, 22c are provided respectively. Also, these second simultaneous open valves 22
Branch pipes 21a, 21b, 2 are provided on a, 22b, 22c.
The second starting pipes 23a, 23 further branched from 1c
One ends of b and 23c are connected. In the middle of these second starting pipes 23a, 23b, 23c, there are provided second starting solenoid valves 24a, 24b, 24c which are opened when the second simultaneous opening valves 22a, 22b, 22c are operated. .

In the middle of the branch pipes 21a, 21b, 21c on the downstream side of the second simultaneous opening valves 22a, 22b, 22c, there is a normally open test gate valve 25a, 25b, 2b.
5c is provided. Gate valve 25 for these tests
a, 25b, 25c and the second simultaneous opening valves 22a, 22b,
In the branch pipes 21a, 21b, 21c between the
Test valves 27a, 27b, 27c that are normally closed via test pipes 26a, 26b, 26c are provided.

The branch pipes 21a, 21b, 21c on the downstream side of the test sluice valves 25a, 25b, 25c each have four branched discharge pipes 28a, 28b, 28c.
Is connected. These discharge pipes 28a, 28b,
At the outlet end of 28c, a discharge head 29 for discharging a digestive agent
a, 29b, 29c are provided.

Furthermore, the fire extinguishing system according to the present embodiment is provided with a plurality of smoke detectors 30 provided near the ceiling of the fire extinguishing target area, and these smoke detectors 30 are sent to the control device 31 via a signal line. It is connected. Also, the first
Solenoid valve for starting 17, second solenoid valves for starting 24a, 24b,
24c, starting pressure air tank 10 and fire extinguishing pump device 3
Is also connected to the control device 31 via a signal line. Further, a fire alarm device 32 is connected to the control device 31 via a signal line. The smoke sensor 30 can be adjusted in its sensitivity, and is appropriately adjusted in accordance with the property of the product in the fire extinguishing target area (concentration of smoke generated during a fire, etc.).

FIG. 2 is a plan view showing a schematic system of the fire extinguishing system according to the present embodiment. As can be seen from this figure, a plurality of smoke detectors 30 are provided in a predetermined arrangement. That is, the four radiation areas d1 in the fire extinguishing area D
, D2, d3, d4, a total of four smoke detectors 30 are provided in the central portion A, and the boundary between the radiation area d1 and the radiation area d3 and the boundary between the radiation area d2 and the radiation area d4 are A total of two smoke detectors 30 are provided in each intermediate portion B, and one smoke detector 30 is further provided in the central portion C of the fire extinguishing target area D.

Next, the operation of the fire extinguishing system according to this embodiment will be described. In normal times, the inside of each of the discharge pipe 4 from the check valve 6 to the first simultaneous opening valve 15 and the first starting pipe 16 branched from the discharge pipe 4 shown in FIG. 1 is pressurized. It is filled with extinguishing agents. Further, the pressure of the extinguished agent is also applied to the branch pipe 9 branched from the discharge pipe 4 and the starting pressure air tank 10 connected to one end of the branch pipe 9. On the other hand, the transport pipe 18, the branch pipes 21a, 21b, 21c, and the discharge pipes 28a, 28b, 2 which are located on the downstream side of the first simultaneous opening valve 15
8c and the like are normally empty pipes. The fire extinguishing pump device 3 is normally stopped.

Next, the case where a fire occurs will be described. Here, it is assumed that a fire has occurred at a point P in the radiation section d1 as shown in FIG.

When a fire occurs at the point P, smoke caused by the fire rises to the ceiling. The smoke that reaches the ceiling diffuses radially along the surface of the ceiling. The smoke diffused in the radial direction first reaches the smoke detector 30 in the central portion C of the fire extinguishing target area D, and the smoke detector 30 detects the smoke and emits a first smoke detection signal. Here, each smoke detector 30
Has a microchip inside, and each smoke detector 3
A unique signal for each 0 can be transmitted. That is, each smoke sensor 30 has its own address. Then, the first smoke detection signal is transmitted to the control device 31 via the signal line, and the control device 31 which has received the first smoke detection signal issues an alarm signal.

This alarm signal is transmitted to the fire alarm device 32 via the signal line, and the fire alarm device 32 receiving the alarm signal issues a first alarm. This first alarm can be audible to signal the occurrence of a fire. The content of the voice may be, for example, "a fire has occurred in the fire target area D."

After a lapse of time from the occurrence of the fire, the smoke diffused in the radial direction along the ceiling reaches the smoke detector 30 located at the middle portion B of the boundary between the radiant areas d1 and d3, and the smoke is detected. The container 30 detects smoke and emits a second smoke detection signal. This second smoke detection signal is transmitted to the control device 31 via the signal line, and the control device 31 which has received the second smoke detection signal transmits a standby signal.

The standby signal is transmitted to the fire alarm device 32 via the signal line, and the fire alarm device 32 receiving the standby signal issues a second alarm. This second alarm is also the first
The warning can be made in the same manner as the alarm, and for example, "the fire occurrence place is the radiation area d1 or the radiation area d2 in the fire target area D".

On the other hand, the standby signal from the control device 31 is transmitted to the first starting solenoid valve 17 via the signal line,
Upon reception of the standby signal, a voltage is applied and the first solenoid valve 17 for starting is opened. When the first start-up solenoid valve 17 is opened, the pressurized extinguishant inside the first start-up pipe 16 or the like is sent to the first simultaneous open valve 15, and the pressure of the sent extinguishant causes the first extinguishing agent to be discharged. 1 The simultaneous opening valve 15 is opened.

Further, when the first starting solenoid valve 17 and the first simultaneous opening valve 15 are opened, the pressure of the extinguishant in the discharge pipe 4 upstream of the first starting solenoid valve 17 decreases, The pressure of the extinguishant in the branch pipe 9 connected to the discharge pipe 4 also decreases at the same time. Then, the pressure in the starting pressure air tank 10 also decreases, and when this pressure reaches a predetermined value or less, the starting pressure air tank 10 transmits a pressure decrease signal. This pressure drop signal is transmitted to the control device 31 via the signal line, and the control device 31 receiving the pressure drop signal transmits a pump start signal. This pump activation signal is transmitted to the fire extinguishing pump device 3 via the signal line, and the fire extinguishing pump device 3 is activated.

When the fire extinguishing pump device 3 is activated, the extinguishant which has been sucked up from the extinguishant storage tank 1 through the suction pipe 2 is passed through the discharge pipe 4 to the first simultaneous open valve 15 which is in an open state. Then, the second simultaneous opening valves 22a, 22b, 22c and the second solenoid valve 24 for starting are sent via the transportation pipe 18 and the branch pipes 21a, 21b, 21c.
It is sent to the downstream side of a, 24b, 24c to be in a pressurized state.

Then, after a lapse of time from the occurrence of the fire, the smoke caused by the fire reaches the smoke detector 30 in the central portion A of the radiation area d1, and this smoke detector 30 emits a third smoke detection signal. . This third smoke detection signal is transmitted to the control device 31 via the signal line.

The controller 31 which has received the third smoke detection signal
Is a total of three smoke detectors 30 that have already received the first and second smoke detection signals and the third smoke detection signal received this time, and the four smoke detectors 30 have four radiation areas d1, d2, d3, d4. Which area of the Here, it is assumed that the three smoke detectors 30 provided at the points B and C belong to any of the adjacent areas.
When the control device 31 determines that all the three smoke detectors 30 that have emitted the first, second, and third smoke detection signals belong to the same radiation area, the radiation area is regarded as the fire occurrence area. A first emission signal is identified and transmitted. In this case, the radiation area d1 is specified as the fire area.

The first emission signal is sent via the signal line to the second activation solenoid valve 24a for the radiation zone d1 and upon receipt of the first emission signal this second activation solenoid valve 24a.
a is released. When the second solenoid valve 24a for opening is opened, the pressurized extinguishing agent is supplied to the second simultaneous open valve 22a for the radiation area d1, and the second simultaneous open valve 22a is opened. When the second simultaneous opening valve 22a is opened, the discharge head 2 for the radiation area d1 is passed through the discharge pipe 28a.
The extinguishant is supplied to 9a and, as shown in FIG. 4, the extinguishant is emitted from the emission head 29a to the radiation area d1. Then, the extinguishing agent discharged from the discharging head 29a extinguishes the fire generated at the point P.

On the other hand, the first emission signal is transmitted to the fire alarm device 32 via the signal line, and the fire alarm device 32 which has received the first emission signal issues a third alarm. This third alarm can also be voiced like the first and second alarms, and can be, for example, "The extinguishant has been released in the radiation area d1 of the fire target area D." .

Further, when more time has passed since the fire started, the smoke that had already been generated before extinguishing the fire, the radiant area d3
The smoke detector 30 installed in the central portion A of the vehicle reaches the smoke detector 30, and the smoke detector 30 sends a fourth smoke detection signal to the control device 31. In this case, the control device 31 has already determined that the radiation area d1
No further emission signal is issued on condition that the first emission signal is transmitted to the second starting solenoid valve 24. That is, the control means 31 is provided with the number-of-times calculating means for calculating the number of times of transmission of the emission signal and the number-of-times setting means for setting the maximum value of the number of times of transmission. Then, the maximum number of transmissions is set to 1 by the number of times setting means, and when the number of transmissions calculated by the number of times calculating means becomes 1, no further emission signal is transmitted.

As described above, according to the fire extinguishing system of the present embodiment, the fire is detected by smoke and the extinguishing agent is released, so that the fire can be extinguished in the initial stage after the fire occurs. The fire damage can be minimized and the amount of extinguishing agent required to extinguish the fire can be minimized. In particular, when a substance that is hard to extinguish once fire is present in the fire extinguishing area D, this disaster prevention system is extremely effective.

Further, the disaster prevention system according to this embodiment is
Since the extinguishing agent does not reach the release head under normal conditions, there is no risk of accidentally releasing the extinguishing agent even if the release head or the like is damaged. Further, in the normal time, the first simultaneous open valve 15 and the second simultaneous open valves 22a, 22b, 22
Since c forms a double barrier, if one of these valves is damaged for any reason, the extinguishing agent will not be accidentally released, and the possibility of incorrect release is extremely low. .

Further, the disaster prevention system according to this embodiment is
Since water can be used as a digestive agent, its application is not limited to airtight spaces.

Further, according to the disaster prevention system according to the present embodiment, the four radiation areas d1 constituting the fire extinguishing area D,
Of the d2, d3, and d4, the extinguishing agent can be released only to one radiation area to which the fire occurrence point P belongs, so that water loss due to release of the extinguishing agent can be minimized.

As a first modification of this embodiment,
It is also possible to be able to release the digestive agent to up to two of the four radiation zones d1, d2, d3, d4. That is, the maximum value of the number of transmissions is set to 2 times by the number of times setting means, and when the number of transmissions calculated by the number of times calculating means becomes 2, no further emission signal is transmitted.

Next, the operation of this modification will be described with reference to FIG. The smoke that has already been generated before extinguishing reaches the smoke detector 30 installed in the central portion A of the radiation area d3, and the smoke detector 30 sends a fourth smoke detection signal to the control device 31. In that case, the control device 31 emits a second emission signal. This second emission signal is sent via the signal line to the second activation solenoid valve 24c for the radiation zone d3, and upon receipt of the second emission signal this second activation solenoid valve 24c is opened. This second solenoid valve 24 for starting
When c is opened, the pressurized extinguishing agent is supplied to the second simultaneous opening valve 22c for the radiation section d3, and the second simultaneous opening valve 22c is opened. When the second simultaneous opening valve 22c is opened, the extinguishing agent is supplied to the emission head 29c for the radiation section d3 via the emission pipe 28c, and the emission head 29c is released.
The extinguishing agent is released from the radiation area d3.

Then, the smoke is further diffused and the radiation area d2
When the smoke detectors 30 at the points B and A are reached and further smoke detection signals are sent from the smoke detectors 30 to the control device 31, the emission signals have already been emitted twice. Therefore, the control device 31 does not emit a further emission signal (third emission signal).

By allowing the release of the extinguishant up to two radiation areas in this way, even in the case of a fire of a substance such as gasoline having an extremely high spread rate, the fire can be surely extinguished.

As a second modification of this embodiment,
The control means 31 may be adapted to emit both the alarm signal and the standby signal when the first smoke detection signal is received. Then, when the second smoke detection signal is received, the control means 31 sends a second alarm signal to the fire alarm device 32 instead of the standby signal,
The fire alarm device 32, which has received the alarm signal of, issues the second alarm.

Further, as a third modification of this embodiment,
It is also possible to further subdivide the emitting area so that the digestive agent can be emitted in each of the subdivided areas.
By doing so, water loss due to the digestive agent can be further reduced.

Second Embodiment Next, a second embodiment of the fire extinguishing system according to the present invention will be described with reference to FIG. The same members as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

This embodiment is a modification of the first valve device 12 of the first embodiment shown in FIG. 1, and FIG. 5 shows a first valve device 50 in this embodiment. The first valve device 50 has a chamber 51 in the middle of the first starting pipe 16 between the first simultaneous opening valve 15 and the first starting solenoid valve 17. Further, an orifice 52 is provided on the upstream side of the chamber 51.

As described above, since the first valve device 50 in this embodiment is provided with the chamber 51 and the orifice 52, when the first starting solenoid valve 17 is opened, the first simultaneous open valve 15 is pressurized. The supplied supply of the extinguishing agent is moderated, and accordingly, the increase in water pressure is moderated, and the opening speed of the first simultaneous opening valve 15 is reduced. Therefore, a water hammer (water hammer) that accompanies the opening of the first simultaneous opening valve 15, specifically, the second simultaneous opening valves 22a, 22b, 22.
c, 22d and second starting solenoid valves 24a, 24b, 24
Water hammer to c and 24d can be prevented.

[0051]

As described above, according to the present invention, a fire can be detected early and extinguished immediately, water loss due to extinguishing agent can be minimized, and further water loss due to malfunction can be prevented. A fire extinguishing system that can be reliably prevented can be provided.

[Brief description of drawings]

FIG. 1 is a system diagram showing an outline of a first embodiment of a fire extinguishing system according to the present invention.

FIG. 2 is a plan view of the embodiment.

FIG. 3 is a plan view for explaining the operation of the same embodiment.

FIG. 4 is a side view for explaining the operation of the same embodiment.

FIG. 5 is a system diagram showing a first valve device of a second embodiment of a fire extinguishing system according to the present invention.

FIG. 6 is a plan view for explaining the configuration and operation of a conventional fire extinguishing system.

FIG. 7 is a side view for explaining the configuration and operation of a conventional fire extinguishing system.

[Explanation of symbols]

 1 Digestive agent storage tank 2 Suction pipe 3 Fire extinguishing pump device 4 Discharge pipe 5, 11, 13, 19 Gate valve 6 Check valve 7, 9, 21a, 21b, 21c Branch pipe 8 Pit tank 10 Starting pressure air tank 12 , 50 1st valve device 14 Alarm valve 15 1st simultaneous opening valve 16 1st starting piping 17 1st starting solenoid valve 18 Transport piping 20 Test circuit 22a, 22b, 22c, 22d 2nd simultaneous opening valve 23a, 23b, 23c, 23d Second start pipe 24a, 24b, 24c, 24d Second start solenoid valve 25a, 25b, 25c, 25d Test sluice valve 26a, 26b, 26c Test pipe 27a, 27b, 27c Test valve 28a, 28b, 28c Discharge pipe 29a, 29b, 29c, 29d Discharge head 30 Smoke detector 31 Controller 51 Chamber 5 Orifice

Claims (4)

[Claims] 1. A plurality of smoke detecting means for emitting a smoke detecting signal when smoke is detected, and a control means for emitting an emission signal when receiving a smoke detecting signal from at least two smoke detecting means. A fire extinguishing system comprising: a fire extinguishing unit that operates in response to the release signal to release the extinguishing agent. 2. The first control means for transmitting a standby signal when receiving the smoke detection signal from any one of the smoke detection means, and any one of the other smoke detection means. And a second control means for transmitting a discharge signal when receiving a smoke detection signal from the fire extinguishing means, wherein the fire extinguishing means is provided with a transportation line for transporting the extinguishing agent, and the waiting line is provided in the transportation line. A first valve means that opens in response to a signal; and a second valve means that is provided on the transportation line downstream of the first valve means and that opens in response to the release signal. The fire extinguishing system according to claim 1. 3. The fire extinguishing system comprises a discriminating means for identifying a smoke sensing means that has emitted a smoke detection signal, and a plurality of the smoke detectors are provided in each of a plurality of radiation areas forming a fire extinguishing target area of the fire extinguishing system. A plurality of branch lines are formed by branching the transportation line downstream of the first valve means, and the second valve means is provided in each of the plurality of branch lines. A line is distributed to the plurality of radiating areas, and the second control means receives the smoke detection signals from at least two smoke sensing means provided in the common radiating area, the common radiating area. The fire extinguishing system according to claim 2, wherein a discharge signal is transmitted to the second valve means of the branch line distributed to the. 4. The control means has a number calculation means for calculating the number of times of transmission of the emission signal and a number setting means for setting a maximum value of the number of times of transmission, and the number of times of transmission becomes the maximum value. The fire-extinguishing system according to claim 3, wherein a discharge signal is not transmitted when the fire-extinguishing system is discharged.