JP2002279547A - Disaster prevention monitoring equipment and composite type alarm - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute both fire monitoring and gas leakage monitoring by connecting a fire and gas leakage alarm to a sensor circuit similarly to a normal fire sensor. SOLUTION: A composite type alarm 5 is provided with a gas leakage alarm circuit part 5A operating by power supply from a commercial AC power source, detecting gas to give an alarm, and outputting a gas detection signal; a fire sensor circuit part 5B operating by power supply from the sensor circuit, outputting a fire occurrence information signal to a disaster prevention information panel via the sensor circuit when detecting a fire, and outputting the electrically separated fire occurrence information signal to the gas leakage alarm circuit part 5A to give a fire alarm; and a signal transmission circuit part electrically separating the gas detection signal outputted from the gas leakage alarm circuit part 5A, and outputting the gas detection signal to the disaster prevention information panel via the sensor circuit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disaster prevention monitoring system for monitoring fire and gas leaks in an apartment house or the like, and a combined alarm device.

[0002]

2. Description of the Related Art Conventionally, as a general fire alarm system in an apartment house, for example, there is one having a configuration shown in FIG.
FIG. 8 shows equipment in the dwelling unit, and a sensor line 2 functioning as a power / signal line drawn from the disaster prevention information panel 1.
One or more fire detectors 3 installed on the ceiling in the dwelling unit are connected to a and 2b.

When the fire detector 3 detects a fire and issues a fire, a fire current flows between the detector lines 2a and 2b, and the fire prevention information panel 1 detects the fire current to perform a fire display and a fire alarm. . In addition, the disaster prevention information panel 1 is connected to a living room receiving panel (not shown) installed in a management room or the like by a transmission line 7a and a power supply line 7b. May cause fire alarm.

[0004] In addition, a commercial AC power supply A is connected to gas leakage signal lines 5a and 5b separately drawn from the disaster prevention information panel 1.
The gas leak alarm 100 operating at C100V may be connected. The gas leak alarm 100 is mainly installed on a kitchen wall, and outputs a detection state to the disaster prevention information panel 1 via a gas leak signal line 5a, 5b by a voltage signal.

More specifically, the gas leak alarm 100 has a voltage of 0 V when a power failure or disconnection occurs, 6 V during normal monitoring, 12 V when gas leakage (methane gas) is detected, and 18 V when carbon monoxide gas is detected.
A voltage signal of V is output. The disaster prevention information panel 1 receives this voltage signal, and detects the gas leak (methane gas) when detecting a gas leak (methane gas).
When a voltage signal of 18 V when V or carbon monoxide gas is detected is identified, a corresponding gas leak display and gas leak alarm are performed.

Here, the fire prevention monitoring equipment that performs fire notification is required to perform fire monitoring for a predetermined time even during a power outage according to the Fire Service Law standards. For this reason, power failure measures must be taken. In the event of a power failure, for example, 24 VDC power is supplied to the disaster prevention information panel and the sensor line from an emergency power supply device installed in the manager's office for a predetermined period of time, and fire monitoring is performed. Will be

[0007] However, the gas leak alarm 100 is
Since the system only operates with the commercial AC power supply of 100 V supplied from the dwelling unit and has no countermeasures against power failure, no gas leakage can be monitored in the event of power failure.

On the other hand, recently, a composite alarm having a gas leak alarm and a fire detecting function for a detached house has been developed and installed. FIG. 9 shows an example of a general composite alarm device.

Referring to FIG. 9, a power supply circuit section 8 generates a predetermined DC power supply voltage for each circuit section using a combined type alarm 1021 and a commercial AC power supply of 100 V AC, and operates the circuit section. The power supply circuit section 8 includes a noise absorption circuit 8a, a power transformer 8b, a rectifier circuit 8c, and a constant voltage circuit 8d.

The gas leak alarm circuit section includes a microcomputer circuit 9,
Gas detection circuit 10, gas sensor drive circuit 11, temperature compensation circuit 12, gas alarm concentration setting circuit 13, power lamp 14a,
Fire light 14b, gas leak light 14c, CO gas leak light 14
and an audio alarm output circuit 15 having a speaker 16.

The gas detection circuit 10 is provided with, for example, a metal oxide semiconductor (SnO3) gas sensor, and detects gas by utilizing the characteristic that when gas adheres to the semiconductor surface, the electric resistance changes rapidly.

The gas sensor driving circuit 11 receives a control signal from the microcomputer circuit 9 based on the output of the temperature compensating circuit 12 provided immediately near the gas sensor, and drives the gas sensor so as to have an optimum sensitivity.

The gas detection circuit 10 is provided with a methane gas (CH4) and a carbon monoxide gas (C
O), the value of the load resistance for accurately capturing is switched, and the output voltage obtained in response to the switching is determined by the microcomputer circuit 9.
And the output voltage is corrected by the output of the temperature compensation circuit 12.

The gas alarm concentration setting circuit 13 sets the alarm sensitivity corresponding to each gas concentration of methane gas and carbon monoxide gas.
Is compared with the output voltage corrected by the temperature compensation, and it is determined whether the gas leaks or the carbon monoxide gas is filled (ventilation alarm state).

A fire alarm circuit 102 is provided in addition to such a gas leak alarm circuit. Fire alarm circuit 102
Is a circuit using a thermistor whose resistance value decreases when the ambient temperature rises. This output is input to the microcomputer circuit 9, and when a predetermined value is reached, it is determined that a fire has occurred.

When a gas leak or a fire is determined and an alarm state is set, an audio alarm output circuit 16 operates according to an instruction of the microcomputer circuit 9 to output a corresponding alarm sound from the speaker 16, and the indicator lamp circuit 14 also outputs the alarm content. Turn on the corresponding indicator light. If a fire and a gas leak are determined at the same time, priority is given to the fire alarm.

Further, a fire alarm contact output circuit 22 and an external output circuit 23 are provided as a transfer circuit section. The fire alarm contact output circuit 22 outputs a normally open contact (a) when a fire is determined.
Contact) and output a no-voltage contact signal. The external output circuit 23 outputs 0 V during a power failure or disconnection, 6 V during normal monitoring, 12 V when detecting a gas leak, and 18 V when detecting carbon monoxide gas.
Is output.

The composite alarm device 101 shown in FIG.
Basically, it is designed for a detached house, and its main purpose is to output an alarm sound by an alarm alone and to operate a shut-off valve of a gas meter. Also, as with the gas leak alarm 100 of FIG. 8, it operates on a commercial AC power supply, and cannot monitor fire during a power outage.

When this combined type alarm is used for disaster prevention monitoring equipment in an apartment house, similar to the gas leak alarm 100 shown in FIG. 8, the signal output of the voltage signal is transmitted to the gas leak signal lines 5a and 5a.
The information will be output to the disaster prevention information panel 1 via b. When the composite alarm 101 determines that a fire has occurred, it displays a fire and outputs a fire alarm sound, and outputs a no-voltage contact signal to operate a gas shut-off valve built in the gas meter.

[0020]

However, when such a conventional combined alarm is applied to a disaster prevention monitoring system for an apartment house, there are the following problems.

First, the composite alarm has a fire detection function but does not have a power failure countermeasure function. Therefore, a non-voltage contact signal serving as a fire signal cannot be connected to the disaster prevention information panel.

For this reason, even if the combined alarm is installed on a kitchen wall or the like, it is necessary to separately install a fire detector connected to the detector line in the kitchen, which results in redundant equipment and increased costs. Become.

[0023] Also, a composite alarm is connected to the detector line,
It is also conceivable to take measures against power failure by receiving power supply from the sensor line. However, in order to drive the gas sensor, it is necessary to supply a drive voltage to the internal heater, which consumes too much power. For this reason, there is a problem that the capacity of the emergency power supply device must be increased if the power failure countermeasures are taken also for the composite alarm device.

Further, in order to perform a gas leak alarm and a ventilation caution alarm on the disaster prevention information panel, special gas leak signal lines 5a and 5b for transferring a voltage signal from the combined alarm are required, and wiring in the dwelling unit is required. It becomes complicated, the cost increases by that much,
Installation work is also complicated.

The present invention provides a disaster prevention monitoring device and a composite alarm which can perform both fire monitoring and gas leak monitoring by connecting the composite alarm to a detector line in the same manner as a normal fire detector. Aim.

[0026]

In order to achieve this object, the present invention is configured as follows. The present invention relates to a disaster prevention monitoring facility for monitoring a fire and a gas leak by connecting a combined alarm having a fire alarm function and a gas leak alarm function to a detector line drawn from a disaster prevention information panel together with a fire detector. In addition, it operates with the power supply from the commercial AC power supply to the combined alarm, detects the gas and gives an alarm, and operates with the gas leak alarm circuit that outputs the gas detection signal and the power supply from the sensor line. When a fire is detected, a fire alarm signal is output to the disaster prevention information panel via the sensor line, and a fire alarm signal is output to the gas leak alarm circuit to provide a fire alarm. And a pulse signal transmission circuit section for electrically separating a gas detection signal output from the gas leak alarm circuit section and then outputting the signal to a disaster prevention information panel by a sensor line via a fire detector circuit section. Installation and prevention Information panel to characterized in that a gas leak monitoring unit for performing an alarm corresponding to identify the fire alert signal and the gas detection signal.
Here, the fire detector circuit unit of the combined alarm device outputs a fire alarm signal to the gas leak alarm circuit unit via the photocoupler.

The signal transmission circuit outputs the gas detection signal to the fire detector circuit via the photocoupler.

For this reason, the fire detector circuit section of the combined alarm device is electrically separated from the power supply from the commercial AC power supply, and operates by receiving power supply from the detector line in the same manner as a normal fire detector. In other words, measures against power failure were taken in the same way as fire detectors, equivalent to the addition of one fire detector,
Therefore, it is not necessary to particularly increase the capacity of the backup power supply. In addition, since it can be connected to the detector line, it is not necessary to install a fire detector in a kitchen or the like where the combined alarm is installed.

Also, a gas detection signal by gas detection can be sent to a disaster prevention information panel via a sensor line to cause a gas leak alarm, thereby eliminating the need for a dedicated gas leak signal line.

The gas leak alarm circuit of the composite alarm device is
A pulse signal having a different pulse width and cycle corresponding to the type of detected gas is output as a gas detection signal, and the monitoring unit of the disaster prevention monitor panel receives and determines the gas detection signal based on the pulse signal from the combined door alarm. Alarm corresponding to the type of detected gas.

The gas leak alarm circuit of the combined alarm device outputs a pulse signal having a pulse width and a period that can be distinguished from the duration of the fire alarm signal for judging a fire on the disaster prevention information panel as a gas detection signal. .

Further, the combined alarm device has a switching circuit unit for switching the power supply to the fire detector circuit unit to a power supply side from a commercial AC power supply or a power supply side from a detector line. One unit can be selectively used for either system use or single use.

The fire detector circuit of the combined alarm is
A test circuit for remote test is provided, and the test circuit performs an operation test by receiving a test signal from the sensor line.

Further, the present invention provides a combined alarm device which has a fire alarm function and a gas leak alarm function and is connected to a detector line together with a fire detector to monitor a fire and a gas leak. The combined alarm of the present invention operates on the power supply from a commercial AC power supply, detects a gas and issues an alarm, and outputs a gas detection signal. A fire that operates and outputs a fire alarm signal to the disaster prevention information panel for the sensor line when a fire is detected, and outputs an electrically separated fire alarm signal to the gas leak alarm circuit to perform a fire alarm. A sensor circuit section and a signal transmission circuit section for electrically separating a gas detection signal output from the gas leak alarm circuit section and then outputting the gas detection signal to a sensor line are provided. Other features in this case are the same as those of the disaster prevention monitoring equipment.

[0035]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory diagram showing the equipment configuration in a dwelling unit in a disaster prevention monitoring equipment according to the present invention.

In FIG. 1, a disaster prevention information panel 1 is installed in each dwelling unit of an apartment house, and sensor lines 2a and 2b functioning as a power / signal line are drawn from the disaster prevention information panel 1 into the dwelling unit. . One or more fire detectors 3 are connected to the detector lines 2a and 2b, and a terminating resistor 4 for disconnection monitoring is connected to the terminal. Incidentally, the disaster prevention information panel 1 is connected to a not-shown living room reception panel by a transmission line 7a and a power line 7b.

Further, in the present invention, the sensor lines 2a,
As with the fire detector 3, a composite alarm 5 having a fire alarm function and a gas leak alarm function is connected to 2b.
As will be described later, the combined alarm 5 has a commercial AC power supply AC1 for the gas leak alarm circuit.
The fire detector circuit is operated by receiving power supply from 00 volts, and the fire detector circuit is operated by receiving power supply from the disaster prevention information panel 1 through the detector lines 2a and 2b.

When a fire is detected by the composite alarm 5,
As in the case of the fire detector 3, the impedance between the detector lines 2a and 2b is made low, and a fire alarm signal is sent to the disaster prevention information panel 1 when an alarm current flows.

The disaster prevention information panel 1 is provided with functions of a fire monitor 1a and a gas leak monitor 1b. Fire monitoring unit 1a
Determines that a fire has occurred when the reception state of the fire alarm signal continues for a predetermined delay time, for example, 200 ms, and issues an audio alarm indicating the operation of the sensor in the dwelling unit. Therefore, even if there is a signal input corresponding to a short fire alarm signal of, for example, less than 200 ms due to noise or the like, the fire monitoring unit 1a does not determine that a fire has occurred.

The fire monitoring unit 1a, which has determined a fire from the fire alarm signal, activates a timer to determine the elapse of a predetermined time, for example, between 2 and 5 minutes. When the button is pressed, a fire confirmation signal is transmitted to a not-illustrated living room receiving panel in the manager's room via the transmission line 7a, and a fire alarm operation is performed. If there is no operation of the confirmation switch button by the resident, a fire confirmation signal is transmitted to the living room receiver at the elapse of the set time of the timer, and a fire alarm operation is similarly performed.

When a gas leak is detected by the gas leak alarm circuit provided in the composite alarm device 5, the sensor lines 2a,
A pulse signal corresponding to the detected gas type is sent to 2b.

The compound alarm 5 can detect two kinds of gas leaks, for example, methane gas (CH4) and carbon monoxide (CO), and different pulse signals corresponding to the detected gas types. A pulse signal having a width and a period is sent to the sensor lines 2a and 2b as a gas detection signal.
The gas detection signal composed of the pulse signal is received by the gas leak monitoring unit 1b, identified and subjected to a gas leak alarm or CO
Perform a ventilation alarm. Of course, the gas leak alarm and the CO ventilation alarm are also performed by the combined alarm 5 itself.

FIG. 2 is a circuit block diagram showing an embodiment of the compound alarm 5 of FIG. The combined alarm 5 used in the present invention includes a gas leak alarm circuit 5A and a fire detector circuit 5B.

The gas leak alarm circuit 5A includes a power supply circuit 8 having a noise absorbing circuit 8a, a power transformer 8b, a rectifier circuit 8c and a constant voltage circuit 8d, a microcomputer circuit 9 having an MPU and a memory, a gas detection circuit. 10, gas sensor drive circuit 11, temperature compensation circuit 12, gas alarm concentration setting circuit 1
3, power lamp 14a, fire lamp 14b, gas leak lamp 14c,
An indicator lamp circuit 14 having a CO gas leak lamp 14d, a fire alarm contact output circuit 22 for outputting a no-voltage contact signal, and an external output circuit 23 for outputting a voltage signal are provided.

On the other hand, a fire detector circuit 18 and a fire alarm signal sending circuit 19 are provided in the fire detector circuit section 5B.
The fire detector circuit 18 is connected to the detector lines 2a and 2b from the disaster prevention information panel 1 in FIG. 1 and operates by receiving power supply. When the fire detector circuit 18 detects a fire, a fire alarm signal is sent to the disaster prevention information panel 1 of FIG. 1 by causing an alarm current to flow with a low impedance between the sensor lines 2a and 2b. At the same time, the fire detector circuit 18 outputs a fire alarm signal to the fire alarm signal sending circuit 19.

A light emitting unit 20a on the LED side of the photocoupler 20 is connected to the fire alarm signal sending circuit 19, and when a fire alarm signal is received from the fire detector circuit 18,
The light emitting section 20a is driven to emit light. The fire alarm signal receiving circuit 21 on the side of the fire gas leak alarm circuit 5A is provided with a light receiving section 2b using a phototransistor of the photocoupler 20, and receives light emission by the fire alarm signal from the light emitting section 20a. To turn on the phototransistor of the light receiving section 2b,
A fire alarm signal is input from the fire alarm signal receiving circuit 21 to the microcomputer circuit 9.

As described above, the gas leak alarm circuit 5A and the fire detector circuit 5B are electrically separated by the fire alarm signal transmitting circuit 19 and the fire alarm signal receiving circuit 21 using the photocoupler 20. I have.

The combined alarm 5 of FIG. 2 further outputs a gas leak signal when the microcomputer circuit 9 detects a gas leak of methane gas and a CO ventilation signal when the carbon monoxide gas is detected, respectively. A signal transmission circuit unit that converts the signal into a pulse signal and transmits the signal is provided. The signal transmission circuit section includes a gas leak signal transmission circuit 33, a CO ventilation signal transmission circuit 34,
R circuit 35, photocoupler 36, and signal receiving / transmitting circuit 3
7.

When the gas leak signal transmitting circuit 33 receives the gas leak signal from the microcomputer circuit 9, it outputs a pulse signal having a predetermined pulse width and period. CO ventilation signal transmission circuit 34
Input the CO ventilation signal from the microcomputer circuit 9,
The pulse signal having a predetermined pulse width and a cycle different from that of the gas leak signal transmission circuit 33 is output.

The pulse signal from the gas leak signal transmitting circuit 33 and / or the CO ventilation signal transmitting circuit 34 is input to the OR circuit 35, and the light emitting section 36 composed of the LED of the photocoupler 36 is provided.
a is driven to emit light.

The light from the light emitting section 36a is
The light is received by the light receiving unit 36b using the phototransistor of the above, and is input to the signal receiving / transmitting circuit 37. The signal receiving / transmitting circuit 37 receives the gas leak signal or the CO ventilation signal which is electrically separated via the photocoupler 36, outputs a corresponding pulse signal to the fire detector circuit 18, and outputs the signal to the fire detector circuit 2.
A pulse signal is sent out in current mode to a and 2b.

FIG. 3 is a time chart of the pulse signal transmitted from the signal transmission circuit section of FIG. FIG. 3A shows C
It is a pulse signal corresponding to the O ventilation signal, and the pulse width is 5
The cycle is set to 300 ms at 0 ms. FIG.
(B) is a pulse signal corresponding to the gas leak signal, which has a pulse width of 5 ms and a cycle of 30 ms.

The pulse width and cycle of each pulse signal corresponding to the CO ventilation signal and the gas leak signal are determined by mistakenly setting the noise set in the fire monitoring unit 1a of the disaster prevention information panel 1 in FIG. 1 as a fire alarm signal. The pulse signal is set so as to be distinguished from a delay time for preventing reception, for example, a delay time of 200 ms.

That is, in the fire monitoring section 1a provided in the disaster prevention information panel 1 of FIG. 1, the fire alarm signal has a delay time of 200 ms.
When the continuation is continued, it is determined that a true fire alarm signal has been received, and the fire alarm signal and each pulse signal corresponding to the CO ventilation signal and the gas leak signal shown in FIGS. To make it possible, a pulse width of 50 ms and a cycle of 300 ms are set for the CO ventilation signal, and a pulse width of 5 ms and a cycle of 30 ms are set for the gas leak signal.

That is, after outputting a pulse signal having a pulse width of 50 ms, the pulse signal corresponding to the CO ventilation signal
The pulse signal corresponding to the gas leak signal is a pulse signal having a pulse width of 1/10 and a cycle of 1/10, that is, a frequency 10 times that of the CO ventilation signal. Yes, Disaster prevention information panel 1 delay time 200
It is possible to clearly identify a fire alarm signal that is determined to be received when ms has been continued.

Further, the gas leak signal and C
Since both pulse signal ORs corresponding to the O ventilation signal are obtained, if both are obtained at the same time, FIG.
A pulse signal combining the CO ventilation signal and the gas leak signal as shown in FIG. Even if the CO ventilation signal and the gas leak signal are transmitted simultaneously, the continuous pulse width is 55 m.
Therefore, the pulse signal is not erroneously received as the fire alarm signal on the disaster prevention information panel side.

There may be a plurality of compound alarms 5 installed in each dwelling unit of an apartment house. For example, in FIG. 1, even if the worst condition in which three combined alarms 5 are connected to the sensor lines 2a and 2b is taken into consideration, the continuous pulse width is 165 ms from (50 ms × 3) + (5 ms × 3) = 165 ms. Therefore, even if the CO ventilation signal and the gas leak signal are transmitted simultaneously as shown in FIG. 3 (C), the delay time for the disaster prevention information panel 1 to determine the reception of the fire alarm signal does not exceed 200 ms. The disaster prevention information panel 1 does not erroneously receive a pulse signal as a fire alarm signal.

Of course, in this embodiment, the condition is determined on the condition that three pulse widths and periods of each pulse signal corresponding to the CO ventilation signal and the gas leak signal are set as the maximum number of the composite alarm devices 5 and that three are connected. However, in consideration of the delay time until the fire alarm signal is received from the disaster prevention information panel 1 on the receiving side and its discriminating ability, an appropriate pulse width and an appropriate pulse width within a range that can be erroneously determined as the fire alarm signal are not considered. What is necessary is just to set a period.

The signals output from the fire detector circuit section 5B to the detector lines 2a and 2b in the combined alarm device 5 of FIG. 2 are also transmitted in a current mode for a CO ventilation signal using a pulse signal and a gas leak signal. In contrast, the fire monitoring unit 1a and the gas leak monitoring unit 1b of the disaster prevention information panel 1 in FIG.
In this case, the line current is received, for example, as a voltage across a resistor inserted and connected to the sensor line 2a. This reception voltage is, for example, as follows. (1) 1.5 to 2.5 volts during normal monitoring (with termination resistor) (2) 1.0 volts or less when disconnection occurs, (3) 4.0 to 5.0 volts when receiving signals Each pulse signal corresponding to a fire alarm signal, a CO ventilation signal, and a gas leak signal is received in a form superimposed on the voltage level in the normal monitoring state, and is subjected to AD conversion of a microcomputer circuit built in the disaster prevention information panel 1 side. Captured to identify the signal.

FIG. 4 is a circuit block diagram showing an example of the fire detector circuit 18 of FIG. This fire detector circuit 18
Is composed of a rectifying circuit 24a, a noise absorbing circuit 24b, a constant voltage circuit 25, a current limiting circuit 26, a heat detecting circuit 27, a comparing circuit 28, a constant temperature setting circuit 29, and a fire signal output circuit 30.

The heat detecting circuit 27 is provided with a thermistor as a temperature detecting element, and converts a decrease in the thermistor resistance value due to a rise in temperature into a voltage, and compares the voltage with a voltage set by a constant temperature setting circuit 29 to thereby obtain a constant temperature sensor. The characteristics are realized.

That is, when the detection signal from the heat detection circuit 27 exceeds the value corresponding to the set temperature of the constant temperature setting circuit 29, the comparison circuit 28 outputs, and the switching element such as the transistor of the fire signal output circuit 30 is turned on. A low-impedance current flows between the sensor lines 2a and 2b connected to L and C, and a fire alarm signal is transmitted to the disaster prevention information panel 1 side.

A light emitting section 20 a using an LED of the photocoupler 20 shown in FIG. 2 is connected in series with the fire signal output circuit 30. For this reason, when a fire detection operation is performed in the fire detector circuit 18 and an alarm current flows between the detector lines 2a and 2b, the light emitting unit 20a of the photocoupler 20 is driven to emit light at the same time. Light receiving section 2 of coupler 20
0b side, and the fire alarm signal receiving circuit 21
A fire alarm signal is input to the microcomputer circuit section 9 via the microcomputer.

The fire signal transmitting circuit 30 is connected to a phototransistor serving as the light receiving portion 20b of the photocoupler 36 in FIG. Therefore, the signal reception / transmission circuit 37 of FIG. 2 is built in the fire signal output circuit 30.

On the other hand, the fire detector 3 in FIG. 1 is a circuit obtained by adding an operation indicator light circuit 31 indicated by a broken line to the circuit in FIG.
Similarly, a fire is detected based on the characteristics of the constant temperature sensor, and a fire alarm signal is transmitted to the sensor line. The operation indicator lamp circuit 33 is driven by transmitting the root fire alarm signal to turn on an operation indicator lamp (not shown).

Next, the operation of the disaster prevention monitoring equipment and the combined alarm of the present invention will be described. As shown in FIG. 1, the compound alarm 6 connected to the detector lines 2a and 2b from the disaster prevention information panel 1
As apparent from FIG. 2, the fire is monitored by receiving the power supply from the detector lines 2a and 2b by the fire detector circuit 18.

At the same time, receiving a supply of the commercial AC power supply of AC 100 volts, the power supply circuit section 8 generates a predetermined DC power supply voltage of, for example, DC 5 volts to be supplied to each circuit section, and operates the gas leak alarm circuit section 5A side. I have.

In this state, when a fire is detected by the fire detector circuit 18 having the circuit configuration shown in FIG.
A low current impedance between a and 2b is applied, and an alarm current flows.
A fire alarm signal is sent to the disaster prevention information panel 1. The fire monitoring unit 1a of the disaster prevention information panel 1 that has received the fire alarm signal displays a fire alarm and notifies the dwelling unit of the operation of the fire detector by a voice alarm.

When the confirmation switch provided on the disaster prevention information panel 1 is turned on within a predetermined time within a range of, for example, 2 to 5 minutes from the reception of the fire alarm signal, the living building reception panel (not shown) is transmitted by the transmission line 7a. A fire confirmation signal is sent to the building, and a fire occurrence display and an alarm display are performed on the receiving side of the living building. If there is no confirmation operation within the predetermined time, the disaster prevention information panel 1 sends a fire confirmation signal to the receiving ward of the house after the predetermined time elapses, and similarly performs a fire occurrence display and an alarm.

On the other hand, in the compound alarm 5 of FIG.
At the same time as the transmission of the fire alarm signal to the detector lines 2a and 2b, the fire detector circuit 18 transmits the fire alarm signal to operate the fire alarm signal transmission circuit 19 to activate the light emitting element 20a of the photocoupler 20. The light emission drive is performed, and the light emission output is received by the light receiving unit 20b, and is input from the fire alarm signal receiving circuit 21 to the microcomputer circuit 9.

The microcomputer circuit 9 which has received the fire alarm signal operates the indicator lamp circuit 14 to turn on the fire lamp 14b. Further, the audio alarm output circuit 15 is activated, and the speaker 16 is activated.
For example, a sound alarm such as "Peepy, the fire alarm has been activated. Please check." Further, by closing the a-contact of the fire alarm contact output circuit 22, a no-voltage contact signal is output to the outside, and for example, a shut-off operation of the gas emergency shut-off valve can be performed.

On the other hand, in the gas detection circuit 10 on the side of the gas leak alarm circuit 5A, an output voltage corresponding to the city gas (methane gas) or the carbon monoxide gas is input to the microcomputer circuit 9 and set by the gas alarm concentration setting circuit 13. If the concentration is exceeded, a gas alarm state is set, and the indicator lamp circuit 14 lights the gas leak lamp 14c or the CO gas leak lamp 14d.

When the speaker 16 is driven by the audio alarm output circuit 15, for example, in the case of gas leakage, an audio alarm such as "Pip-pip-pip, is gas leaking?" In the case of CO gas, an audio alarm such as "Pippo, air is dirty and dangerous. Open the window and ventilate." Further, when a fire and a gas leak overlap, a sound alarm output giving priority to a fire alarm is performed.

Further, the microcomputer circuit 9 gives an instruction to the external output circuit 23 when a gas alarm state occurs, and outputs a voltage signal of 12 V to the outside when gas leak (methane gas) is detected and 18 V when carbon monoxide gas is detected. Outputs a notification. This voltage signal is used as a control output of a microcomputer meter, for example.

On the other hand, if a power failure occurs in a dwelling unit during monitoring, the operation of the gas leak alarm circuit unit 5A of FIG. However, since the fire detector circuit 5B side operates by receiving power supply from the detector lines 2a and 2b, the fire monitoring function is not lost even if a power outage occurs in the dwelling unit.

When the microcomputer circuit 9 detects a gas leak due to the methane gas reaching the alarm gas concentration, a 12-volt gas leak signal is output to the gas leak signal transmitting circuit 33, and the gas leak signal transmitting circuit 33 Outputs a pulse signal having a pulse width of 5 ms and a period of 30 ms to the OR circuit 35 in FIG.

The OR circuit 35 drives the light emitting portion 36a of the photocoupler 36 to emit light by the input pulse signal, and outputs a pulse signal indicating a gas leakage signal electrically separated via the light receiving portion 36b to the pulse signal receiving / transmitting circuit 37. And transmits a pulse signal in a current mode to the detector line via the fire detector circuit 18.

The pulse signal is transmitted by switching the switching element of the fire signal output circuit 30 shown in FIG. 4 on and off by the output of the light receiving section 36b of the photocoupler.
A pulse signal is transmitted to a and 2b in the current mode.

The pulse signal from the composite alarm 5 is received by the disaster prevention information panel 1 shown in FIG.
A pulse voltage rising to 4.0 to 5.0 volts is received in addition to the voltage of 5 volts, and the gas leak monitor 1b identifies the gas leak signal from the pulse width and its cycle, and provides disaster prevention information. On the panel 1, a gas leak alarm is issued by lighting a gas leak alarm lamp and an audio alarm.

The same applies to the output of the CO ventilation signal when the carbon monoxide gas reaches the alarm concentration in the microcomputer circuit 9 of FIG. 2, and the output corresponding to the CO ventilation signal of FIG.
A pulse signal having a period of 300 ms and a period of 300 ms
The CO ventilation signal is sent out between 2b and the gas leak monitoring unit 1b of the disaster prevention information panel 1 in FIG. 1 identifies a CO ventilation signal, and an alarm display prompting ventilation and an audio alarm output are performed.

FIG. 5 is a circuit block diagram showing another embodiment of the compound alarm 5 used in the disaster prevention monitoring panel equipment of the present invention. In this embodiment, the fire detector circuit 5
The power supply to the fire detector circuit 18 provided in B can be switched between the power supply from the detector lines 2a and 2b and the power supply from the power supply circuit unit 8 that supplies power with 100 VAC commercial AC power. It is characterized by having done.

That is, the fire detector circuit 18 and the detector line 2
The power supply switching circuit 32 is connected to a signal line between the connection terminals a and 2b.
Switch 32a. 32b is provided.
Change-over switch 32a. 32b, the common side is connected to the line from the fire detector circuit 18, the switching terminal a is connected to the detector lines 2a and 2b, and the switching terminal b is connected to the power supply circuit 8 side. I have.

By providing such a power supply switching circuit 32, for example, when used by connecting to the sensor lines 2a and 2b from the disaster prevention information panel 1 as shown in FIG. 32a and 32b are switched to the switching terminal a side, whereby the fire detector circuit unit 6B can be operated by receiving power supply from the detector lines 2a and 2b.

On the other hand, when the combined alarm 5 of FIG. 5 is not used for the system but is used independently in a detached house or the like, the changeover switches 32a and 32b are switched to the changeover terminal b side. The fire detector circuit 18, the fire alarm signal transmission circuit 19, and the signal reception / transmission circuit 37 can be operated by the power supply from the unit 8, and the fire detection circuit 18 and the signal reception / transmission circuit 37 are substantially operated.
The same state as that of the conventional compound alarm device 101 can be obtained.

By providing such a power supply switching circuit 32, even with one composite alarm device 5, the fire detector circuit portion operates by supplying power from the sensor line from the disaster prevention information panel 1 side. It is possible to select whether to perform the operation or to operate the fire detector circuit unit with a power supply from a commercial AC power supply as necessary.

FIG. 6 is a view showing the configuration of equipment in a dwelling unit showing another embodiment of the present invention, wherein a remote test is performed on the fire detector and the fire detector circuit of the combined alarm. And

In FIG. 6, a repeater 39 is provided on the sensor lines 2a and 2b on the disaster prevention information panel 1 side, and an external tester 38 is connected to the repeater 39 by a connector cable during a remote test. The fire detector 3 has a remote test circuit 40.
The composite alarm 5 also incorporates a fire detector circuit 18a having a remote test function.

When the test switch is operated by the external tester 38, the relay in the repeater 39 is operated, the connection of the sensor lines 2a and 2b to the disaster prevention information panel 1 is cut off, and the external tester 34 is switched.

In this state, the external tester 34 is provided with the fire detector circuit unit 18 having the remote test function provided in the composite alarm 5.
A test signal (test command) is transmitted while sequentially designating the addresses of the fire detectors 3 including a, and a test is performed. If an alarm signal from the test is received, it is determined that the signal is normal, and the fire alarm signal can be received. If not, it is judged as abnormal and the test result is displayed. As the external tester 34, for example,
A remote tester for performing a remote test such as 259787 can be used.

FIG. 7 is a circuit block diagram of the fire detector circuit unit 18a provided with the remote test function provided in the composite alarm device 5. The fire detector circuit unit 18 of FIG. A test circuit 41 functioning as an interface circuit and a switch circuit 42 are provided for realizing this.

The test circuit 41 receives a test signal specifying the address of the fire detector circuit section 18a from the external tester 38 in FIG. 6, outputs a test signal to the switch circuit 42, and causes the comparison circuit 28 to detect a fire. When the signal is normal from the fire signal output circuit 30, the alarm signal from the test is sent to the external tester 38 via the sensor lines 2a and 2b, and the test result is displayed.

The fire detector 3 with the remote test function shown in FIG. 6 is a circuit obtained by adding an operation indicator circuit 31 shown by a broken line to the circuit shown in FIG. Performs a test operation by receiving the specified test signal,
If normal, a fire alarm signal is sent.

In the embodiment of FIGS. 2 and 5,
Although an external output circuit 23 for transferring a voltage signal from the composite alarm device 5 to the outside is provided, this circuit may be omitted.

In the embodiment shown in FIGS. 2 and 5,
Gas leak signal transmission circuit 33, CO ventilation signal transmission circuit 34
However, a predetermined pulse signal is output by inputting a gas leak signal and a CO ventilation signal from a gas leak signal from the microcomputer circuit 9, but a predetermined pulse signal is output directly from the microcomputer circuit 9. May be. in this case,
The microcomputer circuit 9 incorporates a part of the function of the signal transmission circuit unit.

In the gas leak detection circuit of the above embodiment, two types of gas leaks of methane gas and carbon monoxide gas are detected, but only one of them is detected. It may be.

In the above-described embodiment, the pulse signal transmission method is used to output the gas detection signal to the sensor line. However, the transmission method is not limited to this. It is possible to use a known transmission method such as providing a transmission circuit for exchanging data with an information panel and outputting a gas detection signal to a sensor line by transmission.

In the embodiment shown in FIG. 5, the test processing function of the external tester 38 may be incorporated as a function of the disaster prevention information panel 1, and a remote test may be performed from the disaster prevention information panel 1.

[0098] In the above-described embodiment, the dwelling house or the detached house is taken as an example of the installation place of the disaster prevention monitoring equipment and the compound alarm. However, the present invention is not limited to this. It can also be applied to lodging facilities such as inns and hotels, restaurants, office buildings, and the like.

In the above-described embodiment, the detector line to which the fire detector and the combined alarm are connected is directly drawn from the disaster prevention information panel. However, a repeater is provided, and the line is drawn from the repeater. And a fire alarm signal and a gas detection signal may be sent to a disaster prevention information panel or a living building reception panel via a repeater.

In the above-described embodiment, a constant temperature sensor using a thermistor is used as the fire detector circuit 18 as an example, but other sensors such as a photoelectric smoke detector may be used. Instrument configurations may be used.

[0101]

As described above, according to the present invention, the gas detection signal can also be sent to the disaster prevention information panel through the sensor line to perform a gas leak alarm,
There is no need to connect a dedicated gas leak signal line,
The equipment configuration in the dwelling unit is simplified, and the cost can be reduced.

The fire alarm circuit of the composite alarm device is
It is electrically separated from the power supply from the commercial AC power supply,
It operates by receiving power supply from the sensor line as well as a normal fire detector, and measures against power outages can be realized in the same way as fire detectors. Therefore, it is not necessary to particularly increase the capacity of the backup power supply.

Further, since the composite alarm can be connected to the detector line, it is not necessary to install a fire detector in a kitchen where the composite alarm is installed.

Further, the fire detector circuit of the combined alarm can be remotely tested together with a normal fire detector, which facilitates maintenance and inspection and maintains the reliability of the equipment.

[Brief description of the drawings]

FIG. 1 is an explanatory view of the equipment configuration in a dwelling unit of a disaster prevention monitoring equipment according to the present invention.

FIG. 2 is a circuit block diagram showing an embodiment of the fire gas leak alarm of FIG. 1;

FIG. 3 is a time chart of a pulse signal transmitted by the signal transmission circuit unit of FIG. 2;

FIG. 4 is a circuit block diagram of the fire detector circuit of FIG. 2;

FIG. 5 is a circuit block diagram showing another embodiment of the fire gas leak alarm of FIG. 1;

FIG. 6 is an explanatory diagram showing another embodiment of the disaster prevention monitoring equipment according to the present invention having a remote test function.

FIG. 7 is a circuit block diagram of a fire detector circuit with a remote test function provided in the combined alarm of FIG. 6;

FIG. 8 is an explanatory view of a conventional facility to which a gas leak alarm is connected.

FIG. 9 is a circuit block diagram showing a conventional combined alarm device.

[Explanation of symbols]

 1: House information panel 2a, 2b: Detector line 3: Fire detector 4: Terminating resistor 5: Composite alarm device 8: Power supply circuit section 9: Microcomputer circuit 10: Gas detection circuit 11: Gas sensor drive circuit 12: Temperature compensation Circuit 13: Gas alarm concentration setting circuit 14: Indicator light circuit 15: Voice alarm output circuit 16: Speaker 18: Fire detector circuit 19: Fire alarm signal sending circuit 20, 36: Photocoupler 20a, 36a: Light emitting unit 20b, 36b: Light receiving section 21: Fire alarm signal receiving circuit 22: Fire alarm contact output circuit 23: External output circuit 24: Rectification / noise absorption circuit 25: Constant voltage circuit 26: Current limiting circuit 27: Heat detection circuit 28: Comparison circuit 29: constant temperature setting circuit 30: fire signal output circuit 31: operation indicator light circuit 32: power supply switching circuit 32a, 32b: changeover switch 33: gas leak signal Shin circuit 34: CO ventilation signal transmission circuit 35: OR circuit 37: signal receiving and transmitting circuit 38: External tester 39: repeater 40: for remote testing test circuit 41: Test circuit 42: switching circuit

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] March 30, 2001 (2001.3.3)
0)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction contents]

[0026]

In order to achieve this object, the present invention is configured as follows. The present invention relates to a disaster prevention monitoring facility for monitoring a fire and a gas leak by connecting a combined alarm having a fire alarm function and a gas leak alarm function to a detector line drawn from a disaster prevention information panel together with a fire detector. In addition, it operates with the power supply from the commercial AC power supply to the combined alarm, detects the gas and gives an alarm, and operates with the gas leak alarm circuit that outputs the gas detection signal and the power supply from the sensor line. When a fire is detected, a fire alarm signal is output to the disaster prevention information panel via the sensor line, and a fire alarm signal is output to the gas leak alarm circuit to provide a fire alarm. a vessel circuit, the signal transmitting circuit section you output to disaster prevention information panel by sensor lines through the fire sensor circuit portion after electrically to separate the gas detection signal output from the gas leakage alarm circuit unit And disaster prevention information Characterized in that the identifying a fire alert signal and the gas detection signal alarm corresponding provided <br/> line cormorants monitoring portion. Here, the fire detector circuit unit of the combined alarm device outputs a fire alarm signal to the gas leak alarm circuit unit via the photocoupler.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0030

[Correction method] Change

[Correction contents]

The gas leak alarm circuit of the composite alarm device is
A pulse signal of different pulse widths and periods corresponding to the type of the detected gas output as a gas detection signal, the monitoring unit of the disaster prevention monitoring panel receives determines gas detection signal by the pulse signal from the composite alarm device Alarm corresponding to the type of detected gas.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0034

[Correction method] Change

[Correction contents]

Further, the present invention provides a combined alarm device which has a fire alarm function and a gas leak alarm function and is connected to a detector line together with a fire detector to monitor a fire and a gas leak. The combined alarm of the present invention operates on the power supply from a commercial AC power supply, detects a gas and issues an alarm, and outputs a gas detection signal. work, while the force output by relative sensor lines a fire alert signal upon the fire detection, fire detector circuit which outputs a electrically separated fire alert signal to a gas leak alarm circuit portion to perform fire alarm and parts, a gas detection signal output from the gas leakage alarm circuit section, provided a signal transmission circuit section to be output to sensitive knowledge unit circuits in after being electrically separated via fire sensor circuit unit It is characterized by the following. Other features in this case are the same as those of the disaster prevention monitoring equipment.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0065

[Correction method] Change

[Correction contents]

On the other hand, the fire detector 3 in FIG. 1 is a circuit obtained by adding an operation indicator light circuit 31 indicated by a broken line to the circuit in FIG.
Similarly, a fire is detected based on the characteristics of the constant temperature sensor, and a fire alarm signal is transmitted to the sensor line. And turns on the operation indicator lamp (not shown) drives the actuation indicator lamp circuit 33 by sending or fire Wazawaihatsuho signal.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0076

[Correction method] Change

[Correction contents]

[0076] Further, when gas leakage is detected by the methane gas by the microcomputer circuit 9 reaches the alarm gas concentration is output pairs Shi gas leakage signal to the gas leakage signal transmission circuit 33, a gas leakage signal transmission circuit 33 5 ms pulse width in FIG.
And outputs a pulse signal having a period of 30 ms to the OR circuit 35.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0077

[Correction method] Change

[Correction contents]

[0077] OR circuit 35 emits drives the light emitting portion 36a of the photo coupler 36 by pulse signal input, signal receiving and transmitting circuit 37 a pulse signal indicative of the electrically separated gas leakage signal through the light receiving unit 36b And transmits a pulse signal in a current mode to the detector line via the fire detector circuit 18.

[Procedure amendment 8]

[Document name to be amended] Statement

[Correction target item name]

[Correction method] Change

[Correction contents]

In the embodiment shown in FIGS. 2 and 5,
Gas leak signal transmission circuit 33, CO ventilation signal transmission circuit 34
But we do gas leakage signal from the microcomputer circuit 9, by inputting a CO ventilation signal, but there were outputs a predetermined pulse signal, also possible to output the predetermined pulse signals directly from the microcomputer circuit 9 good. In this case, the microcomputer circuit 9 incorporates a part of the function of the signal transmission circuit unit.

[Procedure amendment 9]

[Document name to be amended] Statement

[Correction target item name]

[Correction method] Change

[Correction contents]

In the embodiment shown in FIG. 6 , the test processing function of the external tester 38 may be incorporated as a function of the disaster prevention information panel 1, and a remote test may be performed from the disaster prevention information panel 1.

[Procedure amendment 10]

[Document name to be amended] Drawing

[Correction target item name] Figure 2

[Correction method] Change

[Correction contents]

FIG. 2

[Procedure amendment 11]

[Document name to be amended] Drawing

[Correction target item name] Fig. 5

[Correction method] Change

[Correction contents]

FIG. 5 ────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] April 5, 2001 (2001.4.5)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 1

[Correction method] Change

[Correction contents]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name]

[Correction method] Change

[Correction contents]

In the embodiment shown in FIGS. 2 and 5,
Gas leak signal transmission circuit 33, CO ventilation signal transmission circuit 34
But gas leakage signal from the microcomputer circuit 9, by inputting a CO ventilation signal, but was designed to output a predetermined pulse signal, may output a predetermined pulse signal directly from the microcomputer circuit 9 . In this case, the microcomputer circuit 9 incorporates a part of the function of the signal transmission circuit unit.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G08B 25/00 510 G08B 25/00 510L 25/04 25/04 H 29/12 29/12 (72) Invention Person Takanori Arino 2-10-43 Kami-Osaki, Shinagawa-ku, Tokyo Inside the Ho Chiki Co., Ltd. Isao 2-10-10-3 Kamiosaki, Shinagawa-ku, Tokyo Ho Chiki Co., Ltd. (72) Inventor Hiroshi Honma 475-8 Hino, Hino-shi, Tokyo (72) Inventor Tatsuo Fujimoto 1-chome, 5-chome, Minato-ku, Tokyo No. Tokyo Gas Co., Ltd. (72) Inventor Toshiyuki Doi 1-5-20 Kaigan, Minato-ku, Tokyo Tokyo Gas Co., Ltd. (72) Honjo Taeko 1-5-20 Kaigan, Minato-ku, Tokyo Tokyo Gas Co., Ltd. Association In-house (72) Inventor Satoshi Nagata 23 Minamikashima, Futamata-cho, Tenryu-shi, Shizuoka Prefecture F-term (reference) 5C085 AA01 AA06 AA08 AB01 AC03 AC07 CA15 CA16 DA08 DA16 EA27 EA43 5C086 AA01 AA02 BA01 CA04 CB02 DA12CB40 EA04 EA17 FA06 FA11 GA09 5C087 AA02 AA03 AA23 AA37 CC23 CC27 DD04 DD07 DD26 EE05 EE10 EE11 GG19 GG35 GG57 GG62 GG69

Claims (14)

[Claims] 1. A disaster prevention monitoring device for monitoring a fire and a gas leak by connecting a combined alarm having a fire alarm function and a gas leak alarm function to a detector line drawn from a disaster prevention information panel together with a fire detector. A gas leak alarm circuit that operates on a power supply from a commercial AC power source, detects gas and issues an alarm, and outputs a gas detection signal to the combined alarm, and gas detection output from the sensor line. A fire detector circuit unit that outputs a fire alarm signal that electrically separates a signal to perform a fire alarm, and a pulse width different according to a signal corresponding to the type of detected gas from the gas leak alarm circuit unit. A signal transmission circuit unit that outputs a pulse signal of a period, and electrically separates and outputs the signal to the disaster prevention information panel by the detector line via the fire detector circuit unit. Disaster prevention monitoring facility, characterized in that the fire alert signal and identifies the gas detection signal, provided the gas leakage monitoring unit for performing an alarm corresponding. 2. The disaster prevention monitoring system according to claim 1, wherein the fire detector circuit of the combined alarm device outputs a fire alarm signal to the gas leak alarm circuit via a photocoupler. Disaster prevention monitoring equipment. 3. The fire prevention and monitoring equipment according to claim 1, wherein the signal transmission circuit of the combined alarm device outputs a gas detection signal to the fire detector circuit via a photocoupler. Disaster prevention monitoring equipment. 4. The disaster prevention monitoring system according to claim 1, wherein the gas leak alarm circuit of the combined alarm outputs a pulse signal having a different pulse width and cycle corresponding to the type of detected gas as a gas detection signal. The monitoring unit of the disaster prevention monitoring panel receives and determines a gas detection signal based on a pulse signal from the combined door alarm and issues an alarm corresponding to the type of detected gas. 5. The disaster prevention monitoring system according to claim 4, wherein the gas leak alarm circuit of the combined alarm device is provided with a gas detection signal for the duration of a fire alarm signal for judging a fire on the disaster prevention information panel. Disaster prevention monitoring equipment that outputs pulse signals with distinguishable pulse widths and periods. 6. The disaster prevention monitoring equipment according to claim 1, wherein the combined alarm device supplies power to the fire detector circuit section from a power supply side from a commercial AC power supply or from a power supply from the sensor line. Disaster prevention monitoring equipment, characterized in that a switching circuit for switching on the supply side is provided. 7. The disaster prevention monitoring equipment according to claim 1, wherein the fire detector circuit of the combined alarm device includes a test circuit for a remote test, and the test circuit receives a test signal from a detector line. Disaster prevention monitoring equipment characterized by performing an operation test. 8. It has a fire alarm function and a gas leak alarm function,
A compound alarm that is connected to a detector line together with a fire detector to monitor fire and gas leaks. It operates with power supplied from a commercial AC power supply, detects gas, issues an alarm, and outputs a gas detection signal. A gas leak alarm circuit unit, which operates by power supply from the sensor line, outputs a fire alarm signal to the sensor line when a fire is detected, and is electrically separated from the gas leak alarm circuit unit. A fire detector circuit unit for outputting a fire alarm signal to perform a fire alarm; and a gas detection signal output from the gas leak alarm circuit unit is electrically separated and sensed via the fire detector circuit unit. And a signal transmission circuit section for outputting to the communication line. 9. The composite alarm device according to claim 8, wherein said fire detector circuit outputs a fire alarm signal to said gas leak alarm circuit via a photocoupler. Alarm. 10. The combined alarm according to claim 8, wherein
The composite alarm device, wherein the signal transmission circuit outputs a gas detection signal to the fire detector circuit via a photocoupler. 11. The combined alarm according to claim 8, wherein
The combined alarm device, wherein the gas leak alarm circuit outputs a pulse signal having a different pulse width and cycle corresponding to the type of detected gas as a gas detection signal. 12. A combined alarm device according to claim 11, wherein said gas leak alarm circuit section has a pulse width that can be distinguished from the duration of a fire alarm signal for judging a fire on a disaster prevention information panel as a gas detection signal. And a pulse signal having a periodic output. 13. The combined alarm according to claim 8,
A combined alarm device comprising a switching circuit unit for switching power supply to the fire detector circuit unit to a power supply side from a commercial AC power supply or a power supply side from the sensor line. 14. A combined alarm according to claim 8, wherein
The fire detector circuit unit includes a test circuit for a remote test,
The compound alarm device, wherein the test circuit performs an operation test by receiving a test signal from a sensor line.