JP2002279548A - Disaster prevention monitoring equipment and composite type alarm - Google Patents

Abstract

PROBLEM TO BE SOLVED: To monitor a fire by connecting a composite type alarm to sensor lines similarly to a normal fire sensor. SOLUTION: This equipment monitors the fire by connecting the composite type alarm 6 to the sensor lines 2a, 2b drawn into a dwelling unit from a disaster prevention information panel together with the fire sensor. The composite type alarm 6 has a gas leakage alarm circuit part 6A operating by power supply from a commercial AC power source and giving a gas leakage alarm when detecting gas; and a fire sensor circuit part 6B operating by power supply from the sensor lines 2a, 2b and outputting a fire occurrence information signal to the disaster prevention information panel via the sensor lines 2a, 2b and to the gas leakage alarm circuit part 6A to give a fire alarm when detecting the fire. The fire sensor circuit part 6B electrically separates the fire occurrence information signal by a photo coupler 20 and outputs the signal to the gas leakage alarm circuit part 6A.

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. 7 shows the equipment in the dwelling unit. Fire detectors installed on the ceiling in the dwelling unit are provided for the detector lines 2a and 2b functioning as a power / signal line drawn from the disaster prevention information panel 1. 3, one or more are connected.

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 manager's office or the like by a transmission line 7a and a power 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 V is identified, a gas leak alarm is issued, and when a voltage signal of 18 V at the time of detection of carbon monoxide gas is identified, an alarm for urging ventilation is issued.

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. As a general compound alarm, there is one having a configuration shown in FIG.

In FIG. 8, a composite alarm 101 is operated by a power supply circuit section 8 producing a specified DC power supply voltage for each circuit section by a commercial AC power supply 100V AC. 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 (CH4) and carbon monoxide gas (CO), and the adjusted set voltage value is sent to the microcomputer circuit 9. It is inputted and 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 15 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.

[0018] Such a composite alarm device 101 of 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. Further, similarly to the gas leak alarm 100 of FIG. 7, it operates on a commercial AC power supply, and cannot monitor a fire during a power failure.

When this combined alarm is used for disaster prevention monitoring equipment in an apartment house, similar to the gas leak alarm 100 of FIG. 7, 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 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.

An object of the present invention is to provide a disaster prevention monitoring facility and a composite alarm which can monitor a fire by connecting the composite alarm to a detector line like a normal fire detector.

[0025]

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. Therefore, the combined alarm operates with power supply from a commercial AC power supply, operates with a gas leak alarm circuit that issues a gas leak alarm when gas is detected, and operates with power supply from a sensor line. A fire alarm circuit that outputs an alarm signal to a disaster prevention information panel via a sensor line and outputs an electrically separated fire alarm signal to a gas leak alarm circuit to perform a fire alarm. It is characterized by. Here, the fire detector circuit outputs a fire alarm signal to the gas leak alarm 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. This means that power outages can be taken in the same way as fire detectors. Also, the connection of the combined alarm device corresponds to the addition of one fire detector, and therefore, it is not necessary to particularly increase the capacity of the emergency power supply device. Furthermore, since it can be connected to a detector line, there is no need to install a fire detector in a kitchen or the like where a combined alarm is installed.

Further, the combined alarm device has a transfer circuit unit for outputting a transfer signal to the outside in accordance with an instruction from the gas leak warning circuit unit.
6V during normal monitoring, 12V when flammable gas leak is detected,
It has a voltage signaling circuit that outputs a voltage signal of 18 V when detecting carbon monoxide gas, and a voltageless signaling circuit that outputs a contact signal with no voltage when detecting fire.

The combined alarm device is provided with a switching circuit for switching the power supply to the fire detector circuit to a power supply side from a commercial AC power supply or a power supply side from a detector line. The system can be selectively used as a system or as a stand-alone unit.

The fire detector circuit section of the combined alarm device includes a test circuit for a remote test, and the test circuit performs an operation test by receiving a test signal from the detector 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 composite alarm device of the present invention operates with a power supply from a commercial AC power supply, and operates with a gas leak alarm circuit unit that performs a gas leak alarm when a gas is detected, and with a power supply from a sensor line, and detects when a fire is detected. A fire alarm circuit that outputs a fire alarm signal to the detector line and outputs an electrically separated fire alarm signal to the gas leak alarm circuit to perform a fire alarm. It is characterized by. Other features in this case are the same as those of the disaster prevention monitoring equipment.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory diagram showing a facility configuration of a disaster prevention monitoring facility according to the present invention on a dwelling unit side. In FIG. 1, a disaster prevention information panel 1 is installed in a dwelling unit, 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 between the detector lines 2a and 2b, and a terminating resistor 4 for disconnection monitoring is connected to the terminal.

In the present invention, the composite alarm 6 is connected between the detector lines 2a and 2b from the terminals L and C of the disaster prevention information panel 1.
Is connected in the same manner as a normal fire detector 3, so that fire monitoring can be performed by a fire detector circuit unit incorporated in the composite alarm 6.

Gas leak signal lines 5a and 5b are drawn out from the disaster prevention information panel 1 by terminals G + and G-, and the gas leak signal lines 5a and 5b are provided with a gas leak alarm incorporated in the combined alarm 6. A transfer circuit unit for outputting a voltage from the circuit unit is connected. As will be described later, the composite alarm 6 operates with the gas leak alarm circuit receiving power supply from a commercial AC power supply of 100 V AC.

The disaster prevention information panel 1 is connected by a transmission line 7a to a living room receiver installed in the manager's office. A power supply line 7b is connected to a power supply unit which is also installed in the manager's office, and a standby power supply unit is connected to this power supply unit so that a power supply can be backed up in the event of a power failure.

FIG. 2 is a circuit block diagram showing an embodiment of the combined alarm 6 of FIG. The combined alarm 6 used in the present invention includes a gas leak alarm circuit 6A and a fire detector circuit 6B.

The gas leak alarm circuit section 6A includes a power supply circuit section 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, and 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, the fire detector circuit section 6B includes a fire detector circuit 18 and a fire alarm signal sending circuit 19. Here, the gas leak alarm circuit 6A includes a fire alarm signal receiving circuit 21.
Except for the above, the configuration and operation are the same as those of the circuit portion of the conventional combined alarm device 101 shown in FIG.

In the present invention, instead of the fire alarm circuit 102 provided in the conventional compound alarm device 101 of FIG. 8, the fire detector circuit 18 of the fire detector circuit section 6B and the fire alarm signal transmission are performed. A circuit 19 and a fire alarm signal receiving circuit 21 on the gas leak alarm circuit 6A side are provided.

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.

The 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. Gas leak alarm circuit 6A
The fire alarm signal receiving circuit 21 on the side includes a photocoupler 20
The phototransistor of the light receiving unit 2b is turned on in response to the light emission by the fire alarm signal from the light emitting unit 20a. Input a fire alarm signal to

As described above, the gas leak alarm circuit 6A and the fire detector circuit 6B 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.

FIG. 3 is a circuit block diagram showing one 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. The thermistor 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 provide 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 20a using an LED of the photocoupler 20 of 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 operates to input a fire alarm signal to the microcomputer circuit 9 via the fire alarm signal receiving circuit 21 to cause a fire alarm operation.

On the other hand, the fire detector 3 in FIG. 1 is a circuit obtained by adding an operation indicator circuit 33 shown 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 sent to the sensor circuit. Further, the operation display lamp circuit 33 is driven by the transmission of the fire alarm signal to light up an operation display (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 composite alarm device 6 connected to the sensor lines 2a and 2b from the disaster prevention information panel 1 and the gas leak signal lines 5a and 5b, as shown in FIG. The power is supplied by the fire detector circuit 18 to monitor the fire.

At the same time, the power supply circuit section 8 receives the supply of the commercial AC power supply AC 100 V,
A predetermined DC power supply voltage of 5 V is generated to operate the gas leak alarm circuit 6A.

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 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 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 after the reception of the fire alarm signal, the living building receiver (not shown) is transmitted by the transmission line 7a. A fire confirmation signal is sent to the building, and the fire alarm is displayed and a warning is issued on the living building receiver side. If there is no confirmation operation within the predetermined time, the disaster prevention information panel 1 sends a fire confirmation signal to the living building receiver at the elapse of the predetermined time, and similarly performs a fire occurrence display and an alarm.

On the other hand, in the compound alarm 6 of FIG.
At the same time that the fire alarm signal is transmitted to the detector lines 2a and 2b, the fire detector circuit 18 transmits a fire alarm signal transmission circuit 19.
The light emitting section 20a of the photocoupler 20 is driven to emit light. The light emitting output is received by the light receiving section 20b, and a fire alarm signal is input from the fire alarm signal receiving circuit 21 to the microcomputer circuit 9.

The microcomputer circuit 9 having received the fire alarm signal operates the indicator light circuit 14 to turn on the fire lamp 14b. Also, the audio alarm output circuit 15 is activated, and the speaker 1 is activated.
From 6, for example, "Peepy, the fire alarm has been activated.
please confirm. Is output.
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 6A, the output voltage of the load resistor corresponding to the gas leak (methane gas leak) of city gas or the like and the carbon monoxide gas is input to the microcomputer circuit 9, When the gas concentration exceeds the concentration set by the gas alarm concentration setting circuit 13, 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 a gas leak, an audio alarm such as "Does the gas leak?" 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.

When the gas alarm state occurs, the microcomputer circuit 9 issues an instruction to the external output circuit 23, and outputs a 12 V voltage signal when gas leakage (methane gas) is detected and a 18V voltage signal when carbon monoxide gas is detected. 5a, 5b
And output it to the disaster prevention information panel 1 via.

On the other hand, if a power failure occurs in a dwelling unit during monitoring, the operation of the gas leak alarm circuit unit 6A of FIG. 2 will be stopped because the commercial AC power supply 100V is cut off.
However, the fire detector circuit section 6B is connected to the detector line 2
The fire monitoring function is not lost even if there is a power outage in the dwelling unit, because the operation is performed by receiving the power supply from a and 2b.

FIG. 4 is a circuit block diagram showing another embodiment of the compound alarm 6 used in the disaster prevention monitoring equipment of the present invention. In this embodiment, the fire detector circuit 6B
The power supply to the fire detector circuit 18 provided in
It is characterized in that it is possible to switch between the power supply from the sensor lines 2a and 2b and the power supply from the power supply circuit section 8 for supplying power with the commercial AC power supply 100V AC.

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.
Are provided with changeover switches 32a and 32b.
The changeover switches 32a and 32b connect the switch terminal a to the line from the fire detector circuit 18, connect the sensor lines 2a and 2b to the switch terminal a, and connect the power supply circuit unit to the switch terminal b. 8 sides are connected.

By providing such a power supply switching circuit 32, when it is connected to the sensor lines 2a and 2b from the disaster prevention information panel 1 and used for a system as shown in FIG. Then, the changeover switches 32a and 32b are switched to the switch terminal a side, whereby the fire detector circuit section 6B can be operated by receiving power supply from the detector lines 2a and 2b.

On the other hand, when the combined alarm 6 shown in FIG. 4 is used not for the system but for a stand-alone house or the like, the changeover switches 32a and 32b are switched to the changeover terminal b side, whereby the power supply circuit is switched. The fire detector circuit 18 and the fire alarm signal transmission circuit 19 can be operated by the power supply from the unit 8, and can be substantially in the same state as the conventional compound alarm device 101 of FIG.

By providing such a power supply switching circuit 32, even with a single composite alarm device 6, the fire detector circuit section 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. 5 shows another embodiment of the present invention in a dwelling unit, in which a remote test is performed on the fire detector and the fire detector circuit of the combined alarm. And

In FIG. 5, a repeater 35 is provided on the sensor lines 2a and 2b on the disaster prevention information panel 1 side, and an external tester 34 is connected to the repeater 35 with a connector cable during a remote test. The fire detector 3 has a remote test circuit 36.
The composite alarm 6 also incorporates a fire detector circuit 18a having a remote test function.

When the test switch is operated by the external tester 34, the relay in the repeater 35 is operated to disconnect the sensor lines 2a and 2b from the disaster prevention information panel 1 and switch to the external tester 34 side.

In this state, the external tester 34 is provided with the fire detector circuit 18 having the remote test function provided in the composite alarm 6.
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 a report signal from the test is received, it is determined that the test is normal, and the report signal cannot be received. If it is abnormal, the test result is displayed.
As the external tester 34 for performing such a remote test, for example, a remote tester disclosed in JP-A-11-259787 can be used.

FIG. 6 is a circuit block diagram of the fire detector circuit section 18a provided with the remote test function provided in the composite alarm device 6, and further implements the remote test function in the fire detector circuit section 18 of FIG. Therefore, a test circuit 37 and a switch circuit 28 functioning as an interface circuit are provided.

The test circuit 37 receives a test signal specifying the address of the fire detector circuit section 18a from the external tester 34 in FIG. 5, outputs a test signal to the switch circuit 38, 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 34 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. 5 is a circuit obtained by adding an operation indicator circuit 33 shown by a broken line to the circuit shown in FIG. Performs a test operation by receiving the specified test signal,
If normal, an alarm signal from the test is sent.

The test processing function of the external tester 34 may be incorporated as a function of the disaster prevention information panel 1 so that a remote test can be performed from the disaster prevention information panel 1.

In the above embodiment, the fire detector circuit 18 is a constant temperature sensor using a thermistor as shown in FIG. 3 as an example. Other sensor configurations, such as sensors, may be used.

Further, in the above-described embodiment, an apartment house or a detached house is taken as an example of a place for installing the disaster prevention monitoring equipment and the compound alarm, but the present invention is not limited to this. The invention can also be applied to accommodation facilities such as inns and hotels, restaurants and office buildings.

Further, in the above-described embodiment, the detector line to which the fire detector and the combined alarm device are connected is directly drawn from the disaster prevention information panel. The fire alarm signal may be sent to a disaster prevention information panel or a reception board of a house through a repeater.

[0073]

As described above, according to the present invention, the fire alarm circuit of the combined alarm device is electrically connected to the gas leak alarm circuit which operates by receiving the power supply from the commercial AC power supply. It is separated and can be operated by receiving power supply in the same way as a normal fire detector by a detector line, and operation with a commercial AC power supply requires measures against power failure, but in the present invention, the fire detector circuit section Operates on the power supply from the sensor line, so there is no need to take any particular measures against power outages.

The connection of the combined alarm of the present invention to the detector line corresponds to the connection of a fire detector. If the combined alarm is connected within the range of the maximum number of fire detectors, disaster prevention monitoring can be performed. It is not necessary to particularly increase the capacity of the backup power supply for measures against power failure in the equipment.

Furthermore, since the composite alarm can be connected to the detector line, there is no need to install a fire detector in the kitchen where the composite alarm is mainly installed, and the equipment configuration in the dwelling unit is simple. Thus, the cost can be reduced.

[Brief description of the drawings]

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

FIG. 2 is a circuit block diagram showing an embodiment of the combined alarm device of FIG. 1;

FIG. 3 is a circuit block diagram of the fire detector circuit of FIG. 2;

FIG. 4 is a circuit block diagram showing another embodiment of the combined alarm of FIG. 1;

FIG. 5 is an explanatory diagram showing another embodiment of the disaster prevention monitoring equipment according to the present invention having a remote test function.

FIG. 6 is a circuit block diagram of a fire detector circuit with a remote test function provided in the combined alarm of FIG. 5;

FIG. 7 is an explanatory view of a conventional facility to which a gas leak alarm is connected.

FIG. 8 is a circuit block diagram showing a conventional combined alarm device.

[Explanation of symbols]

 1: Disaster prevention information panel 2a, 2b: detector line 3: fire detector 4: terminal resistor 5a, 5b: gas leak signal line 6: compound 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 transmission circuit 20: Photocoupler 20 a: Light emitting unit 20b: Light receiving unit 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 32: Power supply switching circuit 32a, 32b: Changeover switch 33: Operation indicator lamp circuit 34: External test 35: repeater 36: for remote testing test circuit 37: Test circuit 38: 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] Claim 6

[Correction method] Change

[Correction contents]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0046

[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 circuit 33 shown 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 sent to the sensor circuit. Further, actuation indicator lamp circuit 33 by sending a fire alert signal causes lit point the operation table 示灯 not shown drive.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0069

[Correction method] Change

[Correction contents]

[0069] It is also possible to incorporate the test processing functions of the external tester 34 as a function of explosion-<br/> disaster information panel 1 performs remote testing from disaster information panel 1.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0073

[Correction method] Change

[Correction contents]

[0073]

As described above, according to the present invention, the fire alarm circuit of the combined alarm device is electrically connected to the gas leak alarm circuit which operates by receiving the power supply from the commercial AC power supply. separated, sensor lines by can operate by receiving power supply like a normal fire detector, although the operation with the commercial AC power supply you require a power fault protection, according to the present invention fire Since the detector circuit operates with power supply from the sensor line, it is not necessary to take any particular measures against power failure.

[Procedure amendment 5]

[Document name to be amended] Drawing

[Correction target item name] Fig. 5

[Correction method] Change

[Correction contents]

FIG. 5

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takanori Arino 2-10-43 Kami-Osaki, Shinagawa-ku, Tokyo Inside Ho Chiki Co., Ltd. (72) Former Gen Masuda 2- 10-43, Kami-Osaki, Shinagawa-ku, Tokyo Inside Ho Chiki Co., Ltd. (72) Inventor Isao Osawa 2-10-43 Kamiosaki, Shinagawa-ku, Tokyo Inside Ho Chiki Co., Ltd. (72) Inventor Hiroshi Honma 475-8 Hino, Hino City, Tokyo (72) Inventor Fujimoto Tatsuo 1-5-20 Kaigan, Minato-ku, Tokyo Tokyo Gas Co., Ltd. (72) Inventor Toshi Toshiyuki 1-20-5 Kaigan, Minato-ku, Tokyo Tokyo Gas Co., Ltd. (72) Inventor Honjo Taeko Tokyo Metropolitan Port 1-5-20, Kaigan-ku, Tokyo Tokyo Gas Co., Ltd. (72) Inventor Satoshi Nagata 23 Minamikashima, Futamata-cho, Tenryu-shi, Shizuoka Prefecture F-term in Yazaki Keiki Co., Ltd. 5C086 AA01 AA02 BA01 CA04 CB02 CB11 CB40 DA04 DA12 EA04 EA17 FA06 FA11 GA09 5C087 AA02 AA03 AA23 AA37 CC23 CC27 DD04 DD07 DD26 EE05 EE10 EE11 GG19 GG35 GG57 GG62 GG69

Claims (10)

[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. The combined alarm device operates with a power supply from a commercial AC power supply, and performs a gas leak alarm circuit unit that performs a gas leak alarm when a gas is detected, and operates with a power supply from the sensor line to detect a fire when a fire is detected. A fire detector circuit for outputting an alarm signal to the disaster prevention information panel via the sensor line and outputting an electrically separated fire alarm signal to the gas leak alarm circuit to perform a fire alarm; and Disaster prevention monitoring equipment comprising: 2. A disaster prevention monitoring system according to claim 1, wherein said fire detector circuit outputs said fire alarm signal to said gas leak alarm circuit via a photocoupler. Facility. 3. The disaster prevention monitoring equipment according to claim 1, wherein said combined alarm device includes a transfer circuit section for outputting a transfer signal to an external device in response to an instruction from said gas leak warning circuit section. The alarm circuit includes a voltage signal transmission circuit that outputs a voltage signal of 0 V at the time of power failure or disconnection, 6 V at the time of normal monitoring, 12 V at the time of detection of flammable gas leakage, and 18 V at the time of detection of carbon monoxide gas. Disaster prevention monitoring equipment comprising a non-voltage signaling circuit that outputs a voltage contact signal. 4. 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 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. 5. 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 the detector line. Disaster prevention monitoring equipment characterized by performing an operation test. 6. It has a fire alarm function and a gas leak alarm function,
A combined alarm that is connected to the detector line together with the fire detector to monitor for fire and gas leaks; a gas leak alarm circuit that operates on power supply from a commercial AC power supply and issues a gas leak alarm when gas is detected; It operates by the power supply from the sensor line, and outputs a fire alarm signal to the disaster prevention information panel for the sensor line when a fire is detected, and is electrically separated from the gas leak alarm circuit by the fire alarm. A composite alarm device comprising: a fire detector circuit for outputting a signal to perform a fire alarm. 7. A composite alarm according to claim 6, wherein said fire detector circuit outputs said fire alarm signal to said gas leak alarm circuit via a photocoupler. Type alarm. 8. The combined alarm device according to claim 6, wherein said combined alarm device includes a transfer circuit unit for outputting a transfer signal to the outside in response to an instruction from said gas leak warning circuit unit, The transfer circuit unit outputs a voltage signal of 0 V at the time of power failure or disconnection, 6 V at the time of normal monitoring, 12 V at the time of detection of flammable gas leakage, and 18 V at the time of detection of carbon monoxide gas. A compound alarm device comprising a non-voltage notification circuit for outputting a non-voltage contact signal. 9. The composite alarm device according to claim 6, wherein said composite alarm device supplies power to said fire detector circuit section from a power supply side from a commercial AC power supply or from said detector line. A combined alarm device comprising a switching circuit for switching to a power supply side. 10. The combined alarm according to claim 6, 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 the sensor line.