JPS61148597A - Fire alarm - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is designed to prevent disaster prevention such as fire doors and fire extinguishing equipment by taking into account the time required for evacuation 1J1 guidance when a fire is determined from the detection information of a fire detector. The present invention relates to a fire alarm system in which equipment is controlled in an interlocked manner.

(Prior art) Traditionally, in buildings such as buildings and department stores, disaster prevention equipment such as fire doors, smoke prevention devices, sprinkler fire extinguishing devices, etc. have been installed in addition to fire alarm systems to notify of fire. .

Therefore, when a fire occurs, a fire alarm is issued to guide evacuation when a fire is determined based on the detection information from the fire detector connected to the fire alarm system by a signal line. For example, fire doors are closed based on detection information from a dedicated fire detector, and sprinkler fire extinguishing systems spray fire extinguishing water using the heat-sensitive operation of the sprinkler head itself. That's what I do.

(Problem to be solved by the invention) However, in such conventional disaster prevention installation M, the disaster prevention equipment was controlled separately from the fire alarm by the fire alarm system. If a fire occurs in an area where fire detectors for fire doors have been installed, both fire detectors will detect the fire almost simultaneously.
Fire alarms were issued to guide evacuations, and fire doors were closed.
People who were present in the area where the fire occurred heard the fire alarm and tried to evacuate, but because the fire door was closed, they had to use another escape exit, and when the fire broke out, the fire extinguishing system was activated. In such a case, the evacuation route would be blocked and there was a risk of serious human casualties due to delayed evacuation.

(Means for Solving the Problems) The present invention has been made in view of the above-mentioned conventional problems.When a fire alarm is issued, the present invention provides disaster prevention equipment that fully takes into account the time required for evacuation guidance. An object of the present invention is to provide a fire alarm system that enables safe and prompt evacuation guidance through interlocking control of the following.

To achieve this objective, the present invention, when determining a fire based on detection information from a fire detector, issues a fire alarm for evacuation guidance, and simultaneously starts a timer to count the elapsed time. And, the time elapsed since the fire judgment was avoided! When a set time, which is determined by taking into consideration the time required for 11 induction, is reached, disaster prevention equipment such as fire doors and extinguishing equipment is activated.

(Example) FIG. 1 is a block diagram showing one embodiment of the present invention.

First, to explain the configuration, 1 is a receiver, and a signal line L1 led out from the receiver 1 includes analog fire detector groups 2a to 2a, which are equipped with a plurality of analog fire detectors for each warning area A1 to 80. 2n is connected. Analog fire detector group 2
As a to 2n, the amount of change in physical development due to the occurrence of a fire, such as temperature, smoke concentration, CO gas concentration, etc., is detected, and fire detection information based on this type of change is sent to the receiver 1.

This analog fire detector not only installs a single type of fire detector at one sensor installation location, but also installs different fire detectors with different detection targets at the same location, such as a heat detector and a smoke detector. 4 also includes cases where both containers are installed.

Furthermore, the control line L2 drawn out from the receiver 1 is connected to fire doors 38 to 3n installed in each warning area A1 to 80, and the control line L3 from the receiver 1 is connected to each warning area A1 to 80. A1
The fire extinguishing equipment 4a to 4n installed every ~80 are connected, and the fire prevention equipment is configured by the fire doors 38 to 3n and the fire extinguishing equipment [4a to 4n]. Of course, disaster prevention equipment includes, in addition to fire doors and fire extinguishing equipment, smoke prevention and exhaust equipment that exhausts smoke generated by a fire and other disaster prevention equipment.

Next, the configuration of the receiver 1 will be described. Reference numeral 5 denotes a call control unit, which performs control to sequentially call the analog fire detector groups 28 to 2n connected via the signal line L1. That is,
The call control unit 5 sequentially sends out a call signal corresponding to the sensor address assigned to each analog fire detector, and identifies the call from the analog fire detector group 28 to 2n from the call signal. The fire detector sends fire detection information back to the receiver 1 via the same transmission line L1. 6
is a reception unit that receives detection information from the analog fire detector called by the call control unit 5. For example, in current mode, it takes in from the voltage change of the current detector resistance sent back via the signal line L1, and receives this reception information. Converts the signal into a digital signal and outputs it.

Further, the receiving section 6 is given a signal indicating a sensor address from the call control section 5, and identifies which sensor the received detection information from the sensor is from.

Reference numeral 7 denotes a fire determination unit that determines a fire based on the detection information from the sensor received by the reception unit 6.

The fire determination process in the fire determination section 7 is executed under program control using, for example, a microcomputer. Furthermore, the fire determination section 7 uses any of the following determination methods or a combination thereof.

(1) When the level of detection signals such as smoke concentration and temperature obtained from fire detection information exceeds a predetermined threshold level, it is determined that there is a fire.

(2) A fire is determined based on the rate of change in fire detection information within a certain period of time.

(3) Patent application No. 58-2992 proposed by the same applicant
Using the function approximation method introduced in issue No. 6, fires are predicted and judged by determining the time it takes for the fire to reach a dangerous level from the fire detection information up to the present moment.

Reference numeral 8 denotes an alarm display section, which receives the output of the fire judgment from the fire judgment section 7 and displays a fire alarm together with the detector address indicating the area where the fire occurred. It also has the function of issuing a fire alarm to guide people to evacuate.

Reference numeral 9 denotes a timer that is activated upon receiving the fire determination output from the fire determination section 7, and the timer 9 counts and outputs the elapsed time from the time when the fire determination output is obtained.

10 is a disaster prevention control unit for remotely controlling the fire doors 38 to 3n and the fire extinguishing devices 4a to 4n, and monitors the counting time of the timer 9 that is started based on fire judgment, taking into account the time required for evacuation guidance. and monitors whether the counting time of the timer 9 reaches a predetermined set time TS, and when the elapsed time from the timer 9's determination of a fire reaches the set time Ts,
Control signals for closing the fire doors and activating the fire extinguishing devices for the fire doors 3a to 3n and the fire extinguishing devices 4a to 4n are sent to the signal line L2. Output via L3. In addition, the disaster prevention control section 1
The control function of 0 is not only to simply output a control signal for operation to all disaster prevention devices, but also to preset the disaster prevention 113 to be controlled depending on the location of the fire.
For example, it has a control function that activates fire doors and fire extinguishing equipment in the area where the fire occurred and adjacent areas, and sequentially activates other disaster prevention equipment corresponding to the area where the fire spreads as the fire spreads.

Next, the interlocking control of fire monitoring and disaster prevention equipment according to the embodiment shown in FIG. 1 will be explained.

FIG. 2 is a flowchart showing a fire monitoring processing routine in the receiver of FIG. First, block 11
In block 12, the sensor address N that performs call control is initially set to N=1, and in block 12, the set address N is set.
Call the sensor corresponding to -1. In response to this sensor call, the analog fire detector that has determined its own call returns detection information such as smoke concentration and temperature, and in block 13 the sensor data (fire detection signal) is received. Next, the process proceeds to judgment block 14, where the fire detection is performed based on detection information such as a comparison of the sensor data obtained in the current call with the threshold value, a rate of change based on the sensor data from the previous time, or a predictive judgment. Determine whether or not. When it is determined in the determination block 14 that there is no fire, the process proceeds to block 15, where the sensor address N is incremented by N-N+1, and further, in the determination block 16, it is determined whether or not it is the final sensor address N, and when the final address is reached. Since it is not, the process returns to block 12 and the next sensor call is made.

On the other hand, if it is determined that there is a fire in the determination block 14, the process proceeds to block 17, where a fire alarm is displayed on the receiver along with the detector address indicating the location of the fire, and at the same time, evacuation guidance is directed to the necessary area centered on the location of the fire. Conduct fire alarms for

In this manner, when a fire alarm is issued, it is determined in the next determination block 16 whether or not the final address has been reached, and if the final address has not been reached, the process returns to block 12 to perform the next sensor call. On the other hand, when the final address is reached, the process returns to one block, initializes the sensor address, and repeats the same fire monitoring.

FIG. 3 is a flowchart showing a disaster prevention control processing routine when a fire is determined in the fire detection processing routine shown in FIG.

Immediately, when a fire is determined in the fire detection processing routine shown in Figure '1t52, the disaster prevention control shown in Figure 3 is executed by interrupt processing, etc., and first, in block 18, a timer is activated to count the time elapsed since the fire was determined. to start.

The time T that has elapsed since the fire was determined by the timer activation is compared with a set time Ts determined in consideration of the time required for evacuation guidance in judgment block 19, and the time T that has elapsed since the fire was determined by the timer has reached the set time Ts. Then block 2o
Fire door closing control in block 21 and activation control of the fire extinguishing system in block 21 are performed.

In this way, as shown in the control flows of FIGS. 2 and 3, in the present invention, when a fire is determined, a fire alarm is first issued to prompt evacuation guidance, and a fire alarm for evacuation guidance is issued. Even if disaster prevention equipment such as fire doors and fire extinguishing equipment is not activated immediately, monitor whether or not a set time has elapsed that takes into account the time required for evacuation f1 guidance from the time the fire is determined. When the elapsed time reaches the set time, the interlocking control of disaster prevention equipment such as closing fire doors and starting fire extinguishing equipment is performed for the first time. By reliably preventing activation and securing an evacuation route, you can quickly guide evacuation and evacuate! It is possible to close the fire door and start the fire extinguishing system in a state where the IJ conduction is completely completed.

On the other hand, since the time required for evacuation guidance varies depending on the area where the fire occurred, the evacuation guidance time required for each area is determined by conducting fire simulation experiments on the target equipment of the fire alarm system. It is desirable to control the disaster prevention equipment in conjunction with the fire judgment at an appropriate timing that differs for each area by comparing the set time that differs for each area with the elapsed time from the fire judgment by the timer.

FIG. 4 is a flowchart showing another embodiment of disaster prevention control based on a fire judgment. In this embodiment, when a timer is activated due to a fire judgment, the remaining time until the disaster prevention device is controlled is displayed. It is characterized by what it did.

That is, a disaster prevention control processing routine is started in response to an interruption due to a fire judgment, and a timer is activated in block 18, and a determination block 19 monitors whether or not the counting time T of the timer reaches the set time TS, and then sets the timer. Until the time Ts is reached, the remaining time until the set time TS is reached, that is, (Ts-T) is displayed in block 22.

By displaying the remaining time from the time the fire alarm is issued until the time the fire protection is closed or the fire extinguishing equipment is activated, it is easier to give instructions for ``il safety guidance'' in the monitoring room where the receiver 1 is installed. In addition, if there is an area where evacuation guidance has not been completely completed even after the scheduled set time S has elapsed, the interlocking control of the disaster prevention equipment when the set time Ts is reached is canceled for that area. This allows operations to prioritize evacuation.

In addition, in both of the disaster prevention controls shown in Figures 3 and 4, during the disaster prevention control process, if it is determined that there is no fire in the fire monitoring processing routine shown in Figure 2 (shown in Figure 2), the disaster prevention control process is canceled. Of course.

Further, although the above embodiment takes as an example a case in which a fire is determined on the receiver side based on detection information from an analog fire detector, the present invention is not limited to this, and the present invention is not limited to this, and the present invention is not limited to this. The present invention can be similarly applied to a fire alarm system using a so-called on/off type fire detector in which a threshold value for determining a fire is set.

In the fire alarm system 2 using this on/off type fire detector, the reliability of the fire alarm differs depending on the set sensitivity of the detector: type 1, type 2, and level 3, so for example, type 3 detection It is desirable to start a timer when receiving the alarm output from a sensitive fire detector, and to interlock control the disaster prevention equipment when the set time is reached.

<Effects of the Invention> As explained above, according to the present invention, in a fire alarm system in which a plurality of fire detectors and disaster prevention equipment such as a fire door extinguishing system are connected to a receiver through signal lines, the fire detection When the receiver determines that there is a fire based on the detection information from the fire alarm, it issues a fire alarm to induce evacuation, and at the same time as the fire is determined, a timer is started to count the elapsed time. Avoid elapsed time! The time required for lit guidance is determined, and when the set time is reached, interlocking control is performed to activate disaster prevention equipment such as fire doors and fire extinguishing equipment, so evacuation guidance is completed after a fire alarm is issued. For a certain period of time, the evacuation route will not be obstructed by activating the fire extinguisher or closing the fire door, making it possible to safely and quickly evacuate based on the fire alarm.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a 70-sheet showing a fire monitoring processing routine in the embodiment of FIG. 1, and FIG. In the example of
FIG. 4 is a flowchart showing a processing routine for disaster prevention control when determining a fire. FIG. 4 is a flowchart showing another embodiment of the disaster prevention control of the present invention. 1: Receiver 28 to 2n: Analog fire detector group 3a to 3n: Fire door 48 to 4n: Fire extinguisher 5: Call control section 6: Receiving section 7: Fire judgment section 8: Alarm display section 9: Timer 10: Disaster prevention Control units A1 to 80: Warning area Ll: Signal line L2. +3: Control line

Claims (1)

[Scope of Claims] A fire alarm device in which a plurality of fire detectors and disaster prevention equipment such as a fire door and a fire extinguisher are connected to a receiver by signal lines, wherein the receiver receives detection information from the fire detector. a fire determining means for determining a fire based on the fire determining means; a timer means activated upon receiving a fire determining output of the fire determining means; and a timer means for activating the disaster prevention equipment when the counting time of the timer means reaches a predetermined set time. A fire alarm device characterized by being provided with a disaster prevention control means.