JP3062329B2 - Fire alarm system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire alarm system having a function to stop a main sound during a maintenance inspection or a fire test of a fire receiver.

[0002]

2. Description of the Related Art In a conventional fire alarm system, when a main sound is emitted and a fire alarm is issued, a warning lamp is used to visually identify in which warning area a fire has occurred and a main sound stop switch is turned on. In this way, if the main sound that is sounding is stopped, the person goes to the alert area where the fire alarm was issued, and if it is confirmed that no fire has occurred in the alert area (that is, if it is a false alarm), Turn on the recovery switch to perform the fire recovery operation, and turn off the main sound stop switch to continue the fire monitoring. However, in the above case, if a fire signal is input to the receiver from another line while the main sound stop switch is turned on, the area indicator corresponding to the fire signal (following fire signal) is turned on. However, since the main sound does not sound, there is a disadvantage that the detection of a fire may be delayed.

In order to solve this drawback, a subsequent re-ringing function is employed. This subsequent re-sounding function is a function to forcibly emit the main sound when the receiver receives a subsequent fire signal while the main sound stop switch is on.

[0004]

By the way, if the fire alarm system is maintained and checked while the above-mentioned subsequent re-ringing function is operating, the main sound is emitted every time the receiver receives a pseudo fire signal from a fire detector or the like. Therefore, there is a disadvantage that the number of times of the main sound is increased at the time of maintenance and inspection, which is harsh. To solve this drawback, a maintenance main sound stop function should be provided to prevent the main sound from sounding when a fire signal is received even if the subsequent re-sound function is operating after the main sound is stopped. I just need. That is, when the maintenance main sound stop switch is turned on, the maintenance main sound stop function is operated. When the maintenance main sound stop switch is turned on, the main sound is sounded even if a fire signal is generated by performing the maintenance and inspection. You won't be harsh because you don't have to.

[0005] However, if a fire signal is received from a line other than the line under maintenance and inspection while the maintenance main sound stop function is operating as described above, there is a problem that the discovery of a fire may be delayed. There is. In other words, if the maintenance main sound stop switch is turned on once during maintenance and inspection, maintenance will be performed without the main sound being sounded at all, and the receiver receives a fire signal from a line other than the line under maintenance and inspection. In such a case, there is a problem that the main sound does not sound and the input of the fire signal is not noticed. However, if the receiver receives a fire signal from a line other than the line under maintenance and inspection, the district light of that line will be lit, so as long as you keep watching the district light, you should immediately notice the fire signal input. However, in reality, it is impossible to keep watching the district lights during maintenance, and it is only noticeable when you happen to look at the district lights. If maintenance is performed while the switch is on, there is a problem that it is delayed to notice that a fire signal has been input from a line other than the maintenance and inspection line.

According to the present invention, there is provided a fire alarm system capable of promptly notifying that a fire signal has been input from a line other than the maintenance / inspection line during maintenance / inspection while the maintenance main sound stop switch is on. It is intended to provide.

[0007]

SUMMARY OF THE INVENTION The present invention is directed to a maintenance and inspection system.
In the meantime, the main maintenance sound stop switch is turned on. In this case,
Sound stops when fire signal is received from two or more lines at the same time
The switch is turned off.

[0008]

According to the present invention , the maintenance main sound stop switch is used during maintenance and inspection.
Switch is turned on, and in this case, a fire alarm
When you receive the signal at the same time, turn off the sound stop switch
Maintenance inspection with the main sound stop switch on
Signal from a line other than the maintenance and inspection line
Can be quickly noticed that
Forget the operation of turning off the sound stop switch after turning it on.
Automatically turned off.

[0009]

FIG. 1 is a block diagram showing an embodiment of the present invention.

[0010] In this embodiment, the fire receiver RE is:
The control circuit C and the sensor signal receiving circuits 41, 42,.
4n and smoke and smoke control equipment control circuits 61, 62,..., 6n
, A fire light display circuit 81, a district display circuit 82, an auxiliary light display circuit 83, a switch light display circuit 84, a switch input circuit 85, an acoustic sounding circuit 86, and a fire notification signal control circuit 87, 88. And external device connection interface 8
9, a power supply circuit PS, and a standby power supply PS1.

The fire detectors DE1, DE2,... And the terminating resistor ER are connected to the detector signal receiving circuit 41. The detector signal receiving circuits 42,. Similar things are connected. The smoke control device 61 includes smoke control dampers MD1, MD2, MD3.
Are connected to the smoke and smoke control device control circuit 62n,..., 6n.

The control circuit C comprises a microprocessor MPU for controlling the entire control circuit C, and ROMs 11, 12, 1
3, RAMs 21, 22, 23, and interface 3
1, 32, ..., 3n, 51, ..., 5n, 71, ...,
79, a data bus DB, and an address bus AB.

The ROM 11 has a microprocessor MPU.
ROM for storing the operation program shown in the flowcharts of FIGS.
The ROM 12 is matrix control data that determines the correspondence between the line and the smoke control device. The ROM 12 stores the minimum required matrix control data. The ROM 13 is the minimum required matrix control data. A ROM for storing control data including data, which is set for each site.

The RAM 21 includes a microprocessor MPU
RAMs 22 and 23 are memories for storing other data.

Interfaces 31, 32,..., 3n
, 4n correspond to the sensor signal receiving circuits 41, 42, ..., 4n, the interfaces 51, ..., 5n correspond to the smoke prevention equipment control circuits 61, ..., 6n, and the interfaces 71 to 79 It corresponds to the fire lamp display circuit 81 to the external device connection interface 89.

The switch input circuit 85 is provided with a main sound stop switch. This main sound stop switch also serves as a maintenance main sound stop switch. If the main sound stop switch is continuously pressed for 5 seconds or more, the maintenance main sound stop switch is turned on. When the maintenance main sound stop switch is turned on, the main sound is not sounded even if a fire signal is input to the receiver RE during maintenance and inspection.

The microprocessor MPU and the ROM
11 means that when the maintenance main sound stop switch is turned on and a fire signal is received simultaneously from two or more lines,
It is an example of the control means that sounds the main sound. Further, the microprocessor MPU and the ROM 11 have the main sound stop switch turned on, at least one of the automatic recovery switch, the test recovery switch, and the fire test switch turned on, and the fire signal is simultaneously transmitted from two or more lines. This is an example of a control unit that sounds a main sound when received.

Next, the operation of the above embodiment will be described.

FIG. 2 is a flowchart showing the operation of the above embodiment.

If the main sound should not be sounded during the maintenance and inspection, and the main sound is not to be sounded during the maintenance and inspection, the main sound stop switch provided in the switch input circuit 85 is set to 5
Turn on for more than a second. As a result, the maintenance main sound stop switch constituted by software such as the microprocessor MPU is turned on. Then, the microprocessor MPU determines that the maintenance main sound stop switch is turned on (S1), and when a fire signal is simultaneously input to the fire receiver RE from two or more lines (S2), the microprocessor MPU performs maintenance. The main sound stop switch is turned off (S3), and at the same time, the main sound is sounded to notify the occurrence of a fire and a normal fire monitoring operation is executed (S4).

As described above, according to the above embodiment, when the main maintenance sound stop switch is turned on and a fire signal is simultaneously received from two or more lines, the main sound is sounded. During maintenance and inspection with the switch turned on, it is possible to quickly recognize that a fire signal has been input from a line other than the maintenance and inspection line. In other words, when fire signals are received simultaneously from two or more lines during maintenance and inspection, even if the fire signal from one of the lines is a fire signal generated by maintenance and inspection,
Since the fire signal from the remaining lines is a fire signal generated when a fire phenomenon is actually detected, the main sound is emitted.

If the fire signal is not received simultaneously from two or more lines while the maintenance main sound stop switch is turned on, the judgment is repeated alternately in steps S1 and S2. An inspection operation is performed. Then, when the maintenance and inspection is completed, the inspector turns off the maintenance main sound stop switch (turns off the maintenance main sound stop switch by turning on the main sound stop switch again).
The PU recognizes that the maintenance main sound stop switch has been turned off (S1), and only the normal fire monitoring operation is repeatedly executed (S4, S1).

When performing maintenance and inspection, the fire detector DE
1. Check whether the fire detector and the fire receiver operate normally by heating or adding smoke to each of the DE1,..., Or test the fire of the fire receiver. A switch is turned on, a resistor is sequentially connected to the terminal of each line, and a fire is simulated to check whether the fire receiver operates normally. When a resistor is connected to the terminal of each line in order and a fire is simulated, connect the resistor to only one line at the same time,
That is, when a resistor is connected to a certain line, the resistor for that line is disconnected, and then the resistor is connected to the next line.

FIG. 3 is a flowchart showing the operation of the maintenance main sound stop switch in the above embodiment.

First, the main sound stop switch in the switch input circuit 85 is turned on (S11). If the ON time is short for less than 5 seconds (S12), the main sound stop mode is turned on (S15). In order to indicate that the main sound is stopped, the main sound stop lamp in the switch light display circuit is turned on (S16). On the other hand, if the ON time of the main sound stop switch is a comparatively long time of 5 seconds or more (S12), the maintenance main sound stop mode is turned on (S13) to display that the main sound is stopped for maintenance. Then, the main sound stop lamp blinks (S14). In addition, the fact that the maintenance main sound stop mode was turned on means that
This is the same as turning on the maintenance main sound stop switch, and the microprocessor MPU determines this state (S1).

When the main sound stop switch is pressed, it is determined whether the main sound stop switch is turned on or the maintenance main sound stop switch is turned on after 5 seconds. The determination may be made based on time. Further, in the example shown in FIG. 3, the main sound stop switch is also used as the main sound stop switch. However, a main sound stop switch may be provided separately from the main sound stop switch. Further, in the example shown in FIG. 3, the main sound stop lamp is also used as the maintenance main sound stop lamp, but separately from the main sound stop lamp,
A maintenance sound stop lamp may be provided.

FIG. 4 is a flowchart showing another embodiment of the present invention.

In this embodiment, the main sound is sounded when the main sound stop switch is turned on, the fire test switch is turned on, and a fire signal is simultaneously received from two or more lines. That is, when the main sound stop switch is turned on (S21), the main sound is stopped (S22), the fire test switch is turned on (S23), and when a fire signal is received simultaneously from two or more lines (S24), the main sound is turned off. The stopped state is released and the main sound is emitted (S25), and normal fire monitoring is performed (S26).

That is, when the fire test switch is turned on, it is time to perform a maintenance inspection operation. At this time, the main sound stop mode is turned on, which means that the main sound should be sounded during the maintenance inspection. In this case, processing is performed so as to have the same result as pressing the maintenance main sound stop switch (main sound does not sound depending on a fire signal based on maintenance inspection).
As described above, even if the maintenance main sound stop switch is not pressed during the fire test, the same result as in the maintenance main sound stop mode state is obtained, and the operability is excellent.

In the embodiment shown in FIG. 4, instead of determining whether the fire test switch has been turned on (S21), it may be determined whether the automatic recovery switch has been turned on, or It may be determined whether or not the test restoration switch has been turned on. Alternatively, the process may proceed to step S24 when any one of the fire test switch, the automatic restoration switch, and the test restoration switch is turned on, and may proceed to step S26 when these three switches are off.

FIG. 5 is a flowchart showing a modification of the embodiment shown in FIG. Note that S21 to S23, S24
Steps S26 to S26 are the same as the steps in the flowchart shown in FIG.

The modification shown in FIG. 5 is different from the embodiment shown in FIG. 4 in that a maintenance main sound stop release switch for releasing the maintenance main sound stop function is provided. That is, when the fire test switch is turned on (S23) and the switch for canceling the maintenance main sound stop function is off (S23a),
As in the flowchart shown in FIG. 4, when fire signals are simultaneously received from two or more lines (S24), the main sound is emitted (S25), and normal fire monitoring is performed (S2).
6). On the other hand, when the fire test switch is turned on (S23) and the switch for canceling the maintenance main sound stop function is on (S23a), the maintenance main sound stop mode is not turned on, and the main sound of the subsequent re-ringing method is used. Only the stop mode is turned on, and only normal fire monitoring is performed (S26). Therefore, the maintenance main sound stop function can be released as necessary.

In the embodiment shown in FIG. 5, instead of determining whether or not the fire test switch has been turned on (S21), it may be determined whether or not the automatic recovery switch has been turned on. It may be determined whether or not the test restoration switch has been turned on.

[0034]

According to the present invention, it is possible to quickly recognize that a fire signal has been input from a line other than the maintenance / inspection line during maintenance / inspection while the main maintenance sound stop switch is on. , Also turn on the main sound stop switch
If you forget to turn off after
It has the effect of

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing the operation of the embodiment.

FIG. 3 is a flowchart illustrating an example of an operation of a maintenance main sound stop lamp in the embodiment.

FIG. 4 is a flowchart showing another embodiment of the present invention.

FIG. 5 is a flowchart showing a modification of the embodiment shown in FIG.

[Explanation of symbols]

 RE: fire receiver, MPU: microprocessor, C: control circuit, 41 to 4n: detector signal receiving circuit, DE1 to DE3: fire detector, 11 to 13: ROM.

Claims (3)

(57) [Claims] The main sound and the fire detector are connected respectively.
Fire alarm system with multiple lines
Is turned on even if a fire signal is input to the receiver from the above line.
Sound stop switch that does not sound the main sound
And; 2 or more at the time of maintenance and inspection of the line or the fire detector
When receiving a fire signal from the above line at the same time,
Control means for turning off the stop switch; a provided, fire alarm system for causing sounding the main sound. 2. The main sound and the fire detector are respectively connected.
And the terminals of the above lines when turned on
To connect a resistor to the
If a fire alarm signal is input to the receiver from the above line,
Sound stop switch that does not sound the main sound
And; when checking the line, the fire test switch is turned on.
If you receive a fire signal from two or more of the above lines at the same time,
It said control means for the acoustic stop switch off; the provided fire alarm system for causing sounding the main sound. 3. The control means according to claim 1 , wherein said control means receives a fire signal from two or more lines at the same time.
Fire signal is input from a line other than the line under inspection above.
A fire alarm system, characterized in that it is a means for judging that a fire has occurred.