JPH08124071A - Automatic fire alarm system - Google Patents

Abstract

PURPOSE: To provide an automatic fire alarm system capable of surely controlling the operation of an emergency broadcasting device according to the degree of a fire. CONSTITUTION: When a fire monitoring is performed based on the accident warning audible signals from plural fire sensors and the accident warning audible signal from a transmitter operating by a specified operation and a fire alarm is announced by voice by an emergency broadcasting device 2, the assured control of an emergency broadcasting operation is enabled by providing a special stoppage means 4 stopping the operation of an emergency broadcasting part, and the voice alarm corresponding to the degree of a fire condition is performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic fire alarm system, and more particularly, to an automatic fire alarm system having an emergency broadcast device for announcing fire information by voice.

[0002]

2. Description of the Related Art A conventional automatic fire alarm system of this type divides a warning area into predetermined areas and outputs a fire detection signal (warning signal) from a plurality of fire detectors installed in each alarm area. When transmitting to a fire receiver via a line, the receiver receives the alarm signal and determines that "a fire has occurred", an alarm display is provided on the receiver side and audio equipment installed in each area (for example, , Bell) is controlled. That is, a warning signal from a plurality of fire detectors installed in each area is configured to be sent to a receiver via a line, and at the time of a fire alarm, a warning area of the line where a fire is detected, and It controls the area audio equipment in the adjacent area (generally, the same floor or the floor directly above) to issue an alarm.

On the other hand, in recent years, a voice warning by an emergency broadcasting device, which is different from the sound warning of the sound equipment (bell) in this district, has been put into practical use.

[0004]

In the conventional automatic fire alarm system as described above, the bell control output for controlling the operation of the bell as the district audio equipment and the signal output for controlling the fire hydrant are prepared. A special transfer output for operating the emergency broadcast device is not prepared, and a signal for activating a fire hydrant pump used for fire fighting activities in the event of a fire is usually used as a drive signal for the emergency broadcast device.

Therefore, as a matter of course, when the stop switch for stopping the operation of the fire hydrant is operated, the operation of the emergency broadcast device also stops. As a result, when the fire level does not require the use of a fire hydrant, there is a problem that the emergency broadcast also stops even if it is desired to stop only the fire hydrant operation.

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic fire alarm system capable of reliably controlling the operation of an emergency broadcast device according to the degree of fire.

[0007]

In order to solve the above-mentioned problems, an automatic fire alarm system according to the present invention is installed in each alarm area of a plurality of alarm areas and detects a fire and outputs a warning signal. In a fire detector and a transmitter that outputs a warning signal by a specific operation, and an automatic fire notification system that performs fire monitoring based on the warning signals from the plurality of fire detectors and transmitters and gives a fire alarm, An emergency broadcast unit that notifies fire information by voice, an operation control unit that operates the emergency broadcast unit based on a warning signal from the warning area, and a stop unit that stops only the operation of the emergency broadcast unit. It is equipped with.

[0008] Here, the operation control unit, when two or more alarm signals from the fire detector are simultaneously generated, and /
Alternatively, the emergency broadcast unit can be operated when an alarm signal from the transmitter is generated, and the emergency broadcast unit can notify the extent of fire determined based on the alarm signal. it can.

[0009]

In the present invention, fire monitoring is performed based on the alarm signals from a plurality of fire detectors and the alarm signals from the transmitters that operate by a specific operation, and a fire alarm is announced by an emergency broadcast device. In this case, special stop means for stopping the operation of the emergency broadcast section is provided to enable reliable control of the emergency broadcast operation, and a voice alarm corresponding to the degree of the fire situation is given.

[0010]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a block diagram showing the overall configuration of a P-type automatic fire alarm system to which the automatic fire alarm system according to the present invention is applied.

In FIG. 1, an automatic fire alarm system according to the present invention comprises a fire receiver 1, an emergency broadcast device 2, and fire monitoring blocks 3 (1), 3 (2), ..., 3 (n) for each district.
Fire detectors (D) 31 (1,
1), 31 (1, 2), ... 31 (1, m), 31
(2,1), 31 (2,2), ... 31 (2, m), ...
..., 31 (n, 1), 31 (n, 2), ..., 31
(N, m), transmitter (P) 32 (1), 32 (2), ...
..., 32 (n) and speakers 33 (1, 1), 33
(1,2), 33 (2,1), 33 (2,2), ...,
33 (n, 1) and 33 (n, 2).

FIG. 2 is a block diagram showing a structural example of the fire receiver shown in FIG. In FIG. 2, the fire receiver 1 includes fire detectors 31 (1,1) to 31 (n, m).
The operation signal of is received through each line (a pair of lines).
Fire detector operating signal or transmitter 32 (1) -32
The alarm signal from (n) is captured by the central processing unit (CPU) 101 via the interface 108.

The central processing unit 101 controls the automatic fire alarm system of this embodiment as a whole, and the ROM 10
Based on the control program stored in each area monitoring block 3 (1) through the interface 108.
3 (n) and the operation signal from the operation unit 106 via the input / output interface 105, and the RAM 10
4 is used to perform predetermined arithmetic processing, and the interface 10
A control signal is supplied to various relays for outputting an alarm via 2. The display unit 107 displays required information of the entire automatic fire alarm system.

The central processing unit 101 activates the transfer relays F1 to Fn corresponding to the area (for example, floor) where the activated fire detector (D) or transmitter (P) is installed. Normally open contacts f1 of the energized relays F1 to Fn
The fn is closed and the emergency broadcast device 2 is operated. Also,
If there are two or more lines that are issuing operation signals from the fire detector (D), that is, the number of reporting lines, or if there is a report from the transmitter (P), the second fire report The relay FX for power is energized, the normally open contact fx is closed, and the transfer output indicating the degree of the alarm is performed.

The emergency broadcast stop switch (S
When W1) 4 is operated, the relay S1 is energized to open the normally closed contact s1a and stop the transfer.

FIG. 3 is a flow chart showing the operation processing procedure of the central processing unit of the fire receiver shown in FIG. When there is a fire alarm (step S1), it is determined whether or not the fire alarm is from the transmitter 32 (1) to 32 (n) (step S2), and the transmitter (P) issues the alarm. If it is a report, the process proceeds to step S4. If the alarm is not from the transmitter (P), the process proceeds to step S3, and it is determined whether there are two or more fire alarms. If there are two or more alarms, the process proceeds to step S4 and the second fire alarm. Drive relay FX to transfer contact fx
Is closed, a transfer signal is output, and the process proceeds to step S5. In step S3, if there is not more than two fire reports, that is, if there is one report, the process proceeds to step S5, and the transfer relay F1
~ Fn are driven to close the normally open contacts f1 to fn, and a transfer signal is output to perform fire treatment (step S6).
This operation processing procedure ends.

Further, in the embodiment shown in FIG. 2, when the emergency broadcast stop switch 4 is operated, the normally closed contact s1a of the relay S1 for stopping the transfer is provided to stop the transfer. Even if the emergency broadcast stop relay S1 is not provided, the relay relays normally open contacts f1 to f that close the contact during transfer when the emergency broadcast stop switch 4 is operated.
It is also possible to open n and fx.

Further, the contents of the voice alarm from the emergency broadcast device can be given by different types of alarms depending on the degree of reliability of fire alarm and the degree of fire situation. For example, in the case of a fire detector, the first level warning content (attention level) is broadcast by issuing a warning from only one line, and when there are simultaneous warnings from two or more lines, or from a transmitter. When the alarm is issued, the operation of broadcasting the second level alarm content (main alarm) can be performed.

[0019]

As described above, in the automatic fire alarm system according to the present invention, for example, in addition to the transfer output corresponding to the alarm line of the conventional fire receiver, the alarm of the fire detector is also output. The emergency broadcast device is operated by the transfer output that is output when there are two or more reports or when there is a report from the transmitter, and this emergency broadcast operation is stopped only by the emergency broadcast stop switch. Since it is configured, it is possible to easily control the operation of the emergency broadcast device, and it is possible to easily configure a voice alarm of different contents broadcast from the emergency broadcast device.

[Brief description of drawings]

FIG. 1 is a block diagram showing the overall configuration of a P-type automatic fire alarm system to which the automatic fire alarm system according to the present invention is applied.

2 is a block diagram of an embodiment of the fire receiver shown in FIG. 1 according to the present invention.

FIG. 3 is a flowchart showing an operation processing procedure of the central processing unit of the fire receiver shown in FIG.

[Explanation of symbols]

1 Fire Receiver 2 Emergency Broadcast Equipment 3 (1) -3 (n) District Fire Monitoring Block 4 Emergency Broadcast Transfer Stop Switch 31 (1,1) -31 (n, m) Fire Detector (D) 32 (1) ) -32 (n) Transmitter (P) 33 (1,1) -33 (n, 2) Speaker 101 Central processing unit (CP)
U) 102, 108 interface 103 ROM 104 RAM 105 input / output interface 106 operation part 107 display part F1 to Fn transfer relay f1 to fn transfer relay normally open contact FX fire second report relay fx fire second report transfer Contact S1 Emergency broadcast transfer stop relay s1a Emergency broadcast transfer stop Normally closed contact

Claims (3)

[Claims] 1. A guard area is set up in each of the guard areas,
A plurality of fire detectors that detect a fire and output a warning signal, and a transmitter that outputs a warning signal by a specific operation, and fire monitoring based on the warning signals from the plurality of fire detectors and transmitters. In an automatic fire alarm system that conducts a fire alarm, an emergency broadcast unit that announces fire information by voice, an operation control unit that operates the emergency broadcast unit based on a warning signal from the caution area, and the emergency broadcast An automatic fire alarm system comprising: a stop unit that stops only the operation of the unit. 2. The operation control section operates the emergency broadcast section when two or more alarm signals from the fire detector are simultaneously generated and / or when an alarm signal from the transmitter is generated. The automatic fire alarm system according to claim 1. 3. The automatic fire alarm system according to claim 1, wherein the emergency broadcast unit announces the degree of fire determined based on the alarm signal.