JPS60218198A - Fire sensing system - 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] The present invention aims to solve the following problems.

(Field of Industrial Application) The present invention relates to a fire detection system that detects whether or not a fire has occurred in a plurality of dwelling units in a housing complex.

(Prior art) Each dwelling unit is equipped with a display device for the dwelling unit, the control room is equipped with a collective display device, and these are interconnected. There is a system in which each display in a public display device and a collective display device is activated.

(Problem to be solved by the invention) In the above case, if the fire is a small squirt and quickly subsides, each display of the dwelling unit display device and the collective display device stops displaying, and the fire occurs. There was a problem that people were not aware that this had occurred.

The configuration of the present invention is as follows.

(Means for Solving the Problems) The present invention takes the measures as described in the claims above, and its effects are as follows.

(Function) As for the function of the present invention, when the sensor detects a fire, the discrimination circuits of each of the dwelling unit display device and the collective display device determine fidgeting, and each display device is activated. The fire detector self-maintains the sensing state, and as a result, each of the above-mentioned indicators continues to display the display state.

On the other hand, when the recovery switch is opened, the voltage supplied to the sensor is removed and the sensor is restored. As a result, each display is also restored. When a fire is detected and the recovery switch is opened when the system is operating normally, the two discrimination circuits (8) installed in the display device for the dwelling unit both perform discrimination operations. However, when the time set in the timer circuit has elapsed, power is supplied to the sensor from the power supply circuit provided in the display device for the dwelling unit, and the sensor returns to its original monitoring state. During this process, the other timer circuit does not produce any output, so the display in the unit display does not malfunction.

(Example) Below, drawings showing examples of the present application will be described. Reference numeral 1 indicates a dwelling unit display device that is seen in each of a plurality of dwelling units, and 4 indicates a collective display device provided in the management room. The display devices 1 for each dwelling unit and the collective display device 4 are connected by connection lines 5, respectively.

Next, the dwelling unit display device 1 will be explained in detail.

6 is a connection terminal, and 7 is a fire detector, whose internal resistance is high (/MΩ) when no fire is detected, that is, when monitoring, and low when a fire is detected (for example, θ ~ /23).
Ω).

Also, this fire detector 7 is called a self-holding type, and after it detects a human disaster and its internal resistance becomes low, it remains in that state even if the fire is extinguished, and then (4) The ability to restore the original state after a certain period of time (for example, /θF778) when the power to the device is cut off.

It has quality. 8 is a terminating resistor connected in parallel with the sensor 7, and its resistance value is, for example, j,/KΩ. Reference numeral 9 denotes a voltage drop resistor, which may be constructed using a well-known resistor or a lamp. The value used is, for example, 6 ohms. 10 is a changeover switch, 11 is a common terminal, 1
2 and 13 indicate the 71st second switching terminals, respectively. 1
4 is a discrimination circuit, which is configured so that when the input voltage is low (for example, 3V or less) as shown in the figure, it outputs an output signal, but when the input voltage is high, it does not produce such an output (more than iV). be.

Note that, as an example, a comparator is used. The seventh timer circuit is configured to produce an output when the input is present for a predetermined time or longer, and to produce no output when the input disappears. Note that the above-mentioned predetermined time is generally set within 5 seconds, for example, about 2 seconds. Japanese is a fire indicator, which can be an acoustic method, a luminous method, or a combination of both methods. Reference numeral 17 denotes a power supply circuit which accepts alternating current lθ0■ and outputs direct current 6.2V based on power plug theory. The output is sent to the switching terminal 13 as shown in the figure, as well as to the discrimination circuit 14, timer circuit L5, display 16, discrimination circuit 21, timer circuit 4, etc. to be described later. Next, a switching means connected to the connection terminal 6 is shown. In this case, Sae is a discrimination circuit, and as shown in FIG. 3, it is constructed so that it produces an output when the input voltage is low (for example, less than jV), and does not produce such an output when the input voltage is high (iV or more). As this discrimination circuit 21, for example, a well-known comparator is used. 22 is a second timer circuit, which is similar to the above-mentioned timer circuit (2). Note that the predetermined time in this timer circuit n is:
It is set longer than the time required for the sensor 7 to recover and shorter than the predetermined time of the timer circuit diameter, for example, about O0j~/second. This is a relay coil manufactured by No. 23, and is used to operate the changeover switch 10.

Next, the group display device 4 will be explained. The connecting terminals are provided in a number corresponding to the number of dwelling units 1. 2
i1 is the power supply circuit, which accepts 9lθθ from the power plug I.
It is designed to convert the alternating current (2) into 2'AV direct current and output it. A part of the output is also supplied to the first discrimination path (branch), which will be described later, for its operation.

The column is a recovery switch, which is configured so that when the button is pressed, the switch opens and when the button is released, the switch closes. Sae is a resistor for voltage drop, and like the resistor 9, a well-known resistor or lamp is used. The resistance value is, for example, j6θΩ.

Heat is a discriminator circuit, and as shown in Figure 6, if the input voltage is low (
For example, if the input voltage is high (7 V or higher), the output terminal is configured to generate an output (for example, 7V or lower), and not output if the input voltage is high (7V or higher). Note that, for example, a comparator is used as such a device. Reference numeral 31 denotes a signal holding circuit, which is constructed so that once an input signal is applied to the input terminal 31a, an output continues to be generated from the output terminal 31b until a signal (pulse) is applied to the reset terminal 31e. 32 is a fire indicator (acoustic type, light emitting type, or a combination of both types), the number of which corresponds to the number of dwelling units.

(7) Next, the operation of the above structure will be explained. The direct current sent out from the power supply circuit diameter is sent to each connection terminal 6 via the switch 3 and each resistor device, and is sent from these connection terminals δ to the dwelling unit display device 1 via the connection line 5, respectively. In the display device 1, the direct current is received from the connection terminal 6 and sent to the sensor 7 via the changeover switch 10 and the resistor 9. - Under normal conditions without fire under the above conditions, the voltages at the points (a), (b), and (c) in Fig. 1 are as shown in Fig. 1, 3, and 3, respectively. The voltages shown in a), (b), and e) apply. Therefore, none of the discrimination circuit 14, the discrimination circuit 21, and the discrimination circuit produce an output, and the fire indicator 16 of each dwelling unit and the fire indicator in the management room do not perform any display operation. Therefore, the residents of each dwelling unit can know that there is no fire in their home, and the control room can confirm that there is no fire in any of the dwelling units.

Next, when a fire occurs in one dwelling unit, the fire detector 7 of that dwelling unit detects the fire and its internal resistance decreases. Then, in the display (8) for the dwelling unit where the fire occurred, the voltage at point (a) of the device 1 decreases as shown by (a)' in FIG. For this reason, the discrimination circuit 14 detects this and is in a state where it produces an output, and furthermore, after a certain period of time has elapsed, the timer circuit 15 produces an output and the fire indicator 16 starts displaying. On the other hand, in the collective display device in the management room, the voltage at point H drops as shown by (c)' in FIG. Therefore, an output appears at the output end of the discriminating circuit I corresponding to the dwelling unit where the fire occurred, and an output appears at the signal holding circuit 31.

As a result, a display operation is performed on the fire indicator corresponding to the above-mentioned dwelling unit.

As the indicators 16 and 32 operate as described above, the residents of the dwelling unit where the fire occurred can know from the indicator 16 that a fire has occurred in their home, and the indicator also operates in the control room. It is possible to know that a fire has occurred in the dwelling unit 2 by the operation of ``.

As described above, once the sensor 7' detects a fire, it is of a self-holding type, so even if the fire is quickly extinguished, the sensor 7 maintains its sensing state. Therefore, the display 16
And display! continue their display operations.

Next, when restoring the display state of the display as described above, open the restoration switch. Then, the voltages at the points (a), (b), and (c) all become θ■, and the self-holding state of the sensor 7 is released. Then, if the recovery switch row is returned to its original state, each point (a), (b), and e will return to the state shown by (a), (b), and (c) in Figures D, 5, and 6. When a certain voltage is applied, the original monitoring state is restored.

Next, a case will be described in which the recovery switch 28 tube is accidentally opened in the monitoring state as described above. In this case, if the time during which the recovery switch is open is shorter than the time prescribed by the timer circuit ρ, only the path shown by the solid line in FIG. 2 is activated.

That is, the voltage at each point (a), (b), and (c) becomes θV, and the discrimination circuits 14 and 21 detect this, respectively, but the timer circuits 15 and 22 located after them all output Therefore, neither the changeover switch 10 nor the display operation of the display 16 is performed.

On the other hand, if the recovery switch is left open for longer than the time set by the timer circuit η, a signal is applied to the path shown by the solid line in FIG. That is, as in the case of FIG. 2, the discrimination circuits 14 and 21 carry out the discrimination operation, and first the timer circuit ρ produces an output. For this reason, the selector switch 10 is switched. During this process, the timer circuit does not produce any output yet, so the display 16 does not operate. Changeover switch l as above
When O is switched, the sensor 7 is energized from the power source 17, so the early discrimination circuit 14 no longer produces an output. Therefore, the display 16
does not operate 0 Even if you accidentally operate the 114th switch row as described above,
It is possible to prevent the display device 16 in each dwelling unit from erroneously performing a display operation.

Next, if a power outage occurs on the side of the collective display device 4 or a disconnection occurs in the connection line 5, the voltage at point (b) in FIG. 1 changes to tPl! J decreases as shown by (b)'. Therefore, the switching means is activated and the switch 10 is switched from the terminal ν to the terminal U. As a result, the direct current sent from the power supply circuit 17 is sent to the sensor 7 via the switch 10 and the resistor 9, thereby maintaining the monitoring state.

(11) Next, when a power outage occurs in each dwelling unit, power is not sent from the power supply circuit 17 to the discrimination circuit 14 in the display device 1 of that dwelling unit, so even if the above-mentioned fire occurs, the fire display in that dwelling unit will be displayed. device 16 is not activated. However, in the control room, the collective display device 4 performs the same operation as in the above case, and the fire display device associated with the J-class residential unit continues to monitor.

Next, FIG. 7 shows a different example of a changeover switch, and shows an example of a changeover switch constructed from an electronic circuit.

In the figure, the word is a control terminal, Q1+Q2 is a transistor, R1 is a bias resistor, and the inverter is supplied with power through a diode Dl or D2.

In such a configuration, when no signal is applied from the timer circuit to the control terminal section, the transistor Qs is cut off and the transistor Q2 is conductive, so that the terminal 12 is turned off.
The electric current is applied from the terminal 11e to the terminal 11e. On the other hand, when a signal is applied to the control terminal from the timer circuit, transistor Q1 becomes conductive and transistor Q2 is cut off, causing terminal 1
Electricity is supplied from terminal 3e to terminal 11e (12).

It should be noted that parts that are functionally the same or equivalent to those in the previous figure are given the same reference numerals and the alphabet 6, and redundant explanations are omitted. (Furthermore, the same idea will be used in the next editions, and the alphabetical letters ``flg'' will be added in order to omit redundant explanations.) Next, Figure 1 shows a partially different structure of a display device for a residential unit. . In the figure, Kuzu is the signal holding circuit, and the input terminal 3
The output terminal 8a1 has an output terminal 38b and a reset terminal aSC, and the same one as the signal holding circuit m is used. l indicates a pulse generation circuit, and chrysanthemum indicates a recovery switch.

With this configuration, even after the sensor of the housing display device detects a fire and the sensor is restored by the recovery switch of the collective display device, the signal holding circuit will not output a signal. The display device 16f can be kept in the display state continuously. In order to stop the operation of the display device, the recovery switch 11 is closed, a reset pulse is generated from the pulse generation circuit I, and it is applied to the reset terminal 38C of the holding circuit. This causes the output of the holding circuit to disappear and the display 16f to stop operating.

Next, FIG. 9 shows an example in which a display device for a dwelling unit is provided with a switch d capable of restoring the sensor 7g.

In this example, when the switch 41 is opened, the power to the sensor 7g is cut off, and the sensor 7g restores its self-holding state.

(Effects of the Invention) As described above, in this invention, when a fire breaks out in any one of a plurality of dwelling units or a classroom, the fire indicator 16 of the dwelling unit where the fire occurred will display the At the same time, in the control room, the fire indicator section corresponding to the dwelling unit where the fire occurred will operate, allowing the resident of the dwelling unit to know that a fire has occurred in their home. This has the effect of letting you know which dwelling unit the fire broke out in.

Moreover, in the above case, even if the fire is quickly extinguished by a squirt, the fire detector 7 of the dwelling unit maintains its detection state and the fire indicator 1 of each of the dwelling units and the control room is activated.
6 and 32 continue to display, allowing both the dwelling unit and the control room to confirm that a fire has occurred.

Moreover, even if the device is self-maintained as described above, by opening the recovery switch row in the collective display device 4, the power to the sensor 7 is cut off and the self-maintenance is released, and the display in the dwelling unit and management room is 16.32 was restored,
Another feature is that it can be prepared to monitor the next fire.

Furthermore, even if the collective display device 4 is equipped with a recovery switch as described above, if the recovery switch row is opened by mistake, the fire indicator 16 in the fire display device 1 of each dwelling unit will not operate. Before doing so, the detector 7 is energized from the power supply 17 provided in the display device, and as a result, the fire indicator 16 of each dwelling unit remains hidden, thereby avoiding unnecessary surprise to the residents of that dwelling unit. There is also a feature that can prevent this.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 7 is a block diagram of the fire (15) disaster detection system, FIGS. 2 and 3 are partial diagrams showing the state in which the recovery switch is erroneously operated, and FIGS. 6 is a diagram showing the characteristics of the discrimination circuit, FIG. 7 is a circuit diagram showing different examples of switches, and FIGS. 6 and 9 are partial diagrams showing different examples of display devices for dwelling units. 1...Dwelling unit display device, 4...Collection display device, 7.
...Fire detector, 16...Fire indicator, positive, 22...
・Timer circuit, Clear...Fire indicator, Row...Recovery switch. (16) Continued from page 1 0 Inventor Masahiko Teranishi Aichi Prefecture Aichi County Co., Ltd.

Claims (1)

[Claims] Each of the plurality of dwelling units is provided with a dwelling unit display device, and the management room is provided with a collective display device, and the plurality of dwelling unit display devices and the collective display device are connected by a connecting line. In the fire detection system that is connected to each other, each display device for each dwelling unit is provided with a connection terminal to which the connection wire is connected, and the connection terminal has a high internal resistance when no fire is detected. , a fire detector that exhibits low internal resistance when detecting a fire, maintains this state by itself, and recovers when the power supply is cut off.
Connected via a voltage drop resistor, the connection point between the sensor and resistor produces an output when the voltage there is low, but no output when the voltage there is high. A first discrimination circuit is connected to the discrimination circuit, and a first timer circuit that generates an output when the output continues for a predetermined period of time is connected to the discrimination circuit, and a fire indicator for the dwelling unit is connected to the timer circuit. A switching switch ≠ is interposed between the connecting terminal and the resistor, and the state of the switch is such that the common terminal is connected to the resistor and the seventh switching terminal is connected to the connecting terminal. Furthermore, a power supply circuit is connected to the second switching terminal, and a second switching terminal is connected to the connection terminal, which does not produce an output when the voltage value there is high and produces an output when the voltage value is low.
A second discrimination circuit is connected to the discrimination circuit, and the discrimination circuit has a second output power that switches the changeover switch from the seventh changeover terminal to the second changeover terminal when the output continues for a predetermined period of time. Connect the timer circuit, and also
and the predetermined time of the second timer circuit is longer than the time required to restore the fire detector, and the predetermined time of the seventh timer circuit is longer than the predetermined time of the second timer circuit. On the other hand, in the above-mentioned collective display device, the plurality of connection lines connected to the plurality of dwelling unit display devices are individually connected to the plurality of dwelling unit display devices, and the corresponding number of connections are made. Terminals, individual voltage drop resistors are connected to each of these connection terminals, and a power supply circuit is connected to these resistors via a recovery switch.
Furthermore, a discrimination circuit is connected to each of the above connection terminals, which produces an output when the voltage value of each connection terminal becomes a low value, and produces no output when the voltage value becomes a high value. The fire detection system 0 is characterized in that each of the discrimination circuits is connected with a fire indicator for indicating a fire on the housing unit.