JP3091565B2 - Automatic fire detection and extinguishing system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic fire system which is installed in a relatively large space such as sodium in a building or in a chemical plant and detects a fire and automatically extinguishes the fire with a fire extinguishing device such as a water spray gun. It relates to a detection fire extinguisher.

[0002]

2. Description of the Related Art Generally, in a relatively large space, it is not possible to install a sprinkler fire extinguishing system which requires piping equipment in a ceiling. An automatic fire detection and extinguishing system is installed. In such a device, if the size of the fire is determined and the fire is automatically extinguished, the fire used in a large stove or a show will malfunction and water damage will occur. The mode is canceled, and when a fire is detected, a firefighting operation is started after an attendant visually confirms the fire.

[0003] As a fire extinguisher having an automatic mode and a manual mode, for example, as shown in Japanese Patent Application No. 60-298240, a fire extinguisher installed near a fire extinguisher such as a water spray gun installed in a security area is disclosed. 2. Description of the Related Art There is known an operation panel provided with an operation panel and a remote operation panel arranged at a monitoring center or the like, and performing a manual fire extinguishing operation optimally by switching the operation right between the on-site operation panel and the remote operation panel.

[0004]

However, the above-described conventional automatic fire detection and extinguishing apparatus has an automatic mode for detecting a fire and automatically extinguishing the fire, but extinguishes the fire in a manual mode to prevent malfunction. Therefore, there is a problem that the automatic mode cannot be used effectively.

The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide an automatic fire detection and extinguishing apparatus capable of preventing a malfunction in an automatic mode and automatically and surely extinguishing an actual fire. .

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a fire detector which scans a monitoring area in two dimensions and outputs a fire detection level and position, and detects a fire in the monitoring area. A fire extinguishing means for extinguishing the fire, and wherein the initial detection level of the fire detector at a position in the monitoring area is equal to or higher than a predetermined level, and the detection level of the fire detector after a predetermined time has elapsed is the initial detection level. And a control means for activating the fire extinguishing means when the position of the detection level equal to or higher than the initial detection level is the same as the position of the initial detection level.

[0007]

According to the present invention, when the initial detection level of the fire detector at a certain position of the monitoring area is equal to or higher than a predetermined level, the detection level of the fire detector after a predetermined time has elapsed is equal to or higher than the initial detection level. If the position of the detection level equal to or higher than the initial detection level is the same as the position of the initial detection level, it is determined that a fire has occurred.

In other words, if the initial detection level of the fire detector at a certain position in the monitoring area is equal to or higher than a predetermined level, and if the detection level of the fire detector after a lapse of a predetermined time is lower than the initial detection level, the fire spreads. Not, and
If the position of the detection level equal to or higher than the initial detection level is not the same as the position of the initial detection level, it means that the fire is moving, and is not determined to be a fire. Therefore, automatic fire extinguishing is performed when the fire source at a certain position is expanded at the same position, so that a malfunction in the automatic mode can be prevented and the actual fire can be extinguished automatically and reliably.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of the automatic fire detection and extinguishing apparatus according to the present invention, and FIG. 2 is a flowchart for explaining the operation of the automatic fire detection and extinguishing apparatus of FIG. 1 in the automatic mode. In FIG. 1, a scanning fire detector 1
For example, a two-dimensional scan of the monitoring area is performed to detect the fire F based on the heat radiation energy radiated from the fire F in the monitoring area, and a level corresponding to the size of the fire F is detected each time the two-dimensional scanning is completed. It is configured to output the detection signal and the position (coordinates) of the fire F. As shown in FIG. 2, the fire arithmetic unit 2 operates in the automatic mode to detect the fire F from the scanning fire detector 1.
A discriminator 2a for discriminating whether or not there is a fire based on the size of the fire, the position, and the duration of the fire F at that position. And the alarm display device 7 having a CRT or the like displays the fire position.

The water discharge gun 4 is disposed so as to be able to discharge water into the monitoring area, that is, into the fire extinguishing area, and is activated by a water discharge instruction from the fire extinguishing water discharge gun controller 3 to discharge water to the fire position. The fire extinguishing agent in the tank 6a is supplied to the water discharge gun 4 via the pump 6 and the motor-operated valve 5, and the pump 6 is activated by a water discharge instruction from the fire-extinguishing water discharge gun control device 3. The pressure and the flow rate of the fire extinguishing agent of the electric valve 5 are controlled by the fire extinguishing water gun control device 3.

Next, the operation of the above embodiment will be described with reference to FIG.
In particular, the operation of the discriminator 2a will be described. The routine shown in FIG. 2 is executed by the discriminator 2a for each point scanning position in the monitoring area,
Also during this operation, the scanning fire detector 1 performs scanning, and sends a detection signal of a level corresponding to the size of the fire F and the position of the fire F to the discriminator 2a every time the two-dimensional scanning is completed. I have.

The discriminator 2a discriminates whether or not the magnitude of a fire at one detection point is equal to or higher than a predetermined level (step S1). That is, even when fireworks or the like used in a show or the like occur, the process proceeds to step S2 and the subsequent steps. Next, a timer is started in step S2, and in the following step S3, the level and its position determined in step S1, that is, the initial level and the initial position are stored.

When the timer expires after a lapse of a predetermined time (step S4), a detection level input after the timer expires from the scanning fire detector 1 in step S5, and in step S6, the detection level exceeds the initial level. It is determined whether or not the fire has increased. Next, in step S7, it is determined whether or not the position of the detection level is the same as the initial position, that is, whether or not the fire source is moving. Proceed,
The fire position information and the fire extinguishing agent discharge command are output to the fire extinguishing water gun control device 3. When a fire actually occurs, the fire source does not usually move even if the fire spreads.

On the other hand, if the detected level is not higher than the initial level in step S6, and step S7
If the position of the detection level is not the same as the initial position, the process branches to step S9, where the fire position information and the caution alarm are sent to the alarm display device 7 without judging that a fire has occurred.
A display to that effect is made. Therefore, according to the above embodiment, the initial detection level is equal to or higher than the threshold value (step S
1) And it is a case where the fire is increasing by determining whether the detection level after a predetermined time is equal to or higher than the initial detection level (step S6), and this detection position is the same as the detection position of the initial detection level. Since it is determined whether or not the fire source does not move (step S7), the automatic fire extinguishing is performed, so that a malfunction in the automatic mode can be prevented and the actual fire can be extinguished automatically and reliably.

[0015]

As described above, according to the present invention,
When the initial detection level of the fire detector at a certain position in the monitoring area is equal to or higher than a predetermined level, the detection level of the fire detector after a predetermined time has elapsed is equal to or higher than the initial detection level, and the detection level is equal to or higher than the initial detection level. Is determined to be a fire when the position of the fire detection unit is the same as the position of the initial detection level. If the initial detection level of the fire detector at a position in the monitoring area is equal to or higher than a predetermined level, a fire detection after a predetermined time has elapsed. If the detection level of the detector is less than the initial detection level, the fire has not spread, and if the position of the detection level above this initial detection level is not the same as the position of the initial detection level, the fire may move. Is not determined to be a fire. Therefore, the automatic fire extinguishing is performed when the fire source at a certain position is expanded at the same position, so that a malfunction in the automatic mode can be prevented and the actual fire can be extinguished automatically and reliably.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of an automatic fire detection and extinguishing apparatus according to the present invention.

FIG. 2 is a flowchart for explaining an operation in an automatic mode of the automatic fire detection and extinguishing apparatus of FIG. 1;

[Explanation of symbols]

 1: Scanning fire detector 2: Fire arithmetic unit 2a: Discriminator 3: Fire extinguisher gun control unit 4: Water gun 5: Electric valve 6: Pump 6a: Tank 7: Alarm display unit

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) G08B 17/00-17/12 G08B 25/00 A62C 3/00-3/16 A62C 27/00-39 / 00

Claims (1)

(57) [Claims] 1. A fire detector that scans a monitoring area two-dimensionally and outputs a detection level and a position of a fire, fire extinguishing means for extinguishing a fire in the monitoring area, and a position where the monitoring area is located At the initial detection level of the fire detector is equal to or higher than a predetermined level, and the detection level of the fire detector after a predetermined time has passed is equal to or higher than the initial detection level, and the detection level is equal to or higher than the initial detection level. And a control means for activating the fire extinguishing means when the position is the same as the position of the initial detection level.