JP4366025B2 - Disaster prevention monitoring equipment and combined alarm - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disaster prevention monitoring facility and a combined alarm device for monitoring fire and gas leakage in an apartment house, and more particularly to a disaster prevention monitoring facility and a combined alarm device for remotely testing a gas detection function.
[0002]
[Prior art]
Conventionally, as a general fire alarm facility in an apartment house, for example, there is a configuration shown in FIG. FIG. 7 shows the equipment in the dwelling unit. For the sensor lines 2a and 2b functioning as the power / signal line drawn from the disaster prevention information panel 1, the fire detector 3 installed on the ceiling in the dwelling unit. Are connected to one or more.
[0003]
When the fire detector 3 detects a fire and issues a notification, a notification current flows between the detector lines 2a and 2b, and the disaster prevention information panel 1 detects the notification current and performs a fire display and a fire alarm. The disaster prevention information board 1 is connected to a housing ridge receiving board (not shown) installed in a manager's room by a transmission line 7a and a power line 7b. When a fire is judged, a fire confirmation signal is sent to the housing wing receiving board, May cause fire alarm.
[0004]
Moreover, the gas leak alarm device 100 which operates with commercial AC power supply AC100V may be connected to the gas leak signal lines 5a and 5b drawn separately from the disaster prevention information panel 1. The gas leak alarm device 100 is mainly installed on the wall of the kitchen, and outputs the detection state to the disaster prevention information panel 1 through the gas leak signal lines 5a and 5b as a voltage signal.
[0005]
Specifically, the gas leak alarm device 100 outputs a voltage signal of 0V at the time of a power failure / disconnection, 6V at the time of normal monitoring, 12V at the time of detecting gas leak (methane gas), and 18V at the time of detecting carbon monoxide gas. When the disaster prevention information panel 1 receives this voltage signal and identifies the voltage signal of 12V when detecting gas leak (methane gas) or 18V when detecting carbon monoxide gas, the corresponding gas leak display and gas leak alarm are displayed. Do.
[0006]
The fire prevention monitoring equipment that performs fire notification here is obliged to perform fire monitoring for a predetermined time even in the event of a power failure, according to the standards of the Fire Service Act. For this reason, it is necessary to take measures against power outages. In the event of a power outage, for example, a 24 VDC power supply is supplied to the disaster prevention information panel and the sensor line from the emergency power supply installed in the manager's room, etc. for a predetermined period of time. Is called.
[0007]
However, the gas leak alarm device 100 operates only with the commercial AC power supply AC100V supplied from the dwelling unit, and since no power failure countermeasure is taken, no gas leak monitoring is possible when a power failure occurs.
[0008]
On the other hand, recently, for single-family homes, complex alarm devices having a fire detection function in gas leak alarm devices have been developed and installed. As a general composite type alarm device, there is a configuration shown in FIG.
[0009]
In FIG. 8, a predetermined DC power supply voltage for each circuit unit is generated and operated by the power supply circuit unit 8 by the composite alarm device 102 and the commercial AC power supply AC100V. The power supply circuit unit 8 includes a noise absorbing circuit 8a, a power transformer 8b, a rectifier circuit 8c, and a constant voltage circuit 8d.
[0010]
The gas leak alarm circuit unit includes a microcomputer circuit 9, a gas detection circuit 10, a gas sensor drive circuit 11, a temperature compensation circuit 12, a gas alarm concentration setting circuit 13, a power lamp 14a, a fire lamp 14b, a gas leak lamp 14c, and a CO gas leak lamp. It comprises an indicator lamp circuit 14 provided with 14d, and an audio alarm output circuit 15 provided with a speaker 16.
[0011]
The gas detection circuit 10 is provided with, for example, a metal oxide semiconductor (SnO 3) gas sensor, and detects the gas by utilizing the characteristic that the electric resistance rapidly changes when the gas adheres to the semiconductor surface.
[0012]
The gas sensor driving circuit 11 receives the control signal from the microcomputer circuit 9 based on the output of the temperature compensation circuit 12 provided in the immediate vicinity of the gas sensor, and drives the gas sensor so as to have an optimum sensitivity.
[0013]
The gas detection circuit 10 switches the value of the load resistance for accurately capturing methane gas (CH4) and carbon monoxide gas (CO) according to the instruction from the microcomputer circuit 9, and the output voltage obtained in response to the switching Is input to the microcomputer circuit 9 and the output voltage is corrected by the output of the temperature compensation circuit 12.
[0014]
The gas alarm concentration setting circuit 13 sets the alarm sensitivity corresponding to each gas concentration of methane gas and carbon monoxide gas, and the adjusted set voltage value is inputted to the microcomputer circuit 9 and corrected by temperature compensation. It is compared with the output voltage to determine whether there is a gas leak or carbon monoxide gas full (ventilation alarm state).
[0015]
In addition to such a gas leak alarm circuit unit, a fire alarm circuit 102 is provided. The fire alarm circuit 102 is a circuit using, for example, a thermistor whose resistance value decreases as the ambient temperature rises. This output is input to the microcomputer circuit 9 and determines the occurrence of a fire when it reaches a predetermined value.
[0016]
When a gas leak or a fire is judged and an alarm state is reached, the voice alarm output circuit 16 operates according to an instruction from the microcomputer circuit 9 to output a corresponding alarm sound from the speaker 16, and the indicator lamp circuit 14 also displays the alarm content. Turn on the light. If a fire and a gas leak are judged at the same time, priority is given to a fire alarm.
[0017]
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 closes the normally open contact (a contact) when a fire is judged, and outputs a no-voltage contact signal. The external output circuit 23 outputs a voltage signal of 0V at the time of power failure / disconnection, 6V at normal monitoring, 12V at gas leak detection, and 18V at carbon monoxide gas detection.
[0018]
The composite alarm device 101 shown in FIG. 8 is basically designed for a detached house, and has a main purpose of outputting an alarm sound and operating a gas meter shut-off valve. Moreover, like the gas leak alarm 100 of FIG. 7, it operates with a commercial AC power supply, and fire monitoring at the time of a power failure cannot be performed.
[0019]
When this composite type alarm is used for the disaster prevention monitoring equipment of an apartment house, as in the case of the gas leak alarm 100 of FIG. 7, the output output of the voltage signal is sent through the gas leak signal lines 5a and 5b. It will output to the board 1. When the combined alarm device 101 determines that a fire has occurred, it displays a fire, outputs a fire alarm sound, and further outputs a no-voltage contact signal to operate a gas shut-off valve built in the gas meter.
[0020]
[Problems to be solved by the invention]
However, when such a conventional composite alarm device is applied to a disaster prevention monitoring facility for an apartment house, there are the following problems.
[0021]
First, since the composite alarm device has a fire detection function but does not have a power failure countermeasure function, a non-voltage contact signal that becomes a fire signal cannot be connected to the disaster prevention information panel.
[0022]
For this reason, even when the composite type alarm is installed on the wall of the kitchen or the like, it is necessary to separately install a fire detector connected to the sensor line in the kitchen.
[0023]
It is also possible to connect a combined alarm device to the sensor line and take power supply countermeasures by receiving power from the sensor line. However, to drive the gas sensor, supply a drive voltage to the internal heater. Is necessary and consumes too much power. For this reason, there is a problem that the capacity of the emergency power supply must be increased if power failure countermeasures are taken for the composite alarm device.
[0024]
Furthermore, in order to perform gas leak warning and ventilation warning alarm in the disaster prevention information panel, dedicated gas leak signal lines 5a and 5b for transferring the voltage signal from the composite type alarm are required, and the wiring in the dwelling unit becomes complicated. As a result, the cost increases and the installation work becomes complicated.
[0025]
Also, in recent years, in the disaster prevention monitoring equipment as shown in Fig. 8, in order to test the fire detector from outside the dwelling unit, a remote tester is connected to the detector line via a repeater, and the fire detector is installed in turn. And the test operation is performed remotely (Japanese Patent Laid-Open No. 11-259787).
[0026]
However, the conventional combined alarm device having a gas leak alarm function and a fire alarm function has a problem that it cannot be tested by a remote tester because it cannot be connected to a sensor line.
[0027]
The present invention is a disaster prevention system in which a combined alarm device can be connected to a sensor line in the same way as a normal fire detector to perform both fire monitoring and gas leak monitoring, and also to remotely test the gas detection function. An object is to provide monitoring equipment and a combined alarm device.
[0028]
[Means for Solving the Problems]
In order to achieve this object, the present invention is configured as follows. The present invention is a disaster prevention monitoring facility for monitoring a fire and gas leakage by connecting a combined alarm device having a fire alarm function and a gas leak alarm function together with a fire detector to a sensor line drawn from a disaster prevention information panel. The combined alarm device operates with the power supply from the commercial AC power source, and operates with the gas leakage alarm circuit unit that issues a gas leakage alarm when gas is detected and the power supply from the sensor circuit. A fire detector circuit unit that outputs a fire alarm signal by outputting an electrically separated fire alarm signal to the gas leak alarm circuit unit, and a gas leak A gas test unit that tests the gas detection function of the alarm circuit unit, and a test signal transmission that electrically separates the test signal received from the sensor line and sends it to the gas test unit, and outputs a test response signal indicating the test result And gas test The test response signal from the unit is electrically separated and then sent to the sensor line via the fire detector circuit unit, and the type signal indicating the type of the composite alarm device is sent together with the test response signal And a test processing unit for sending a test signal to the sensor line side, receiving a test response signal and a type signal, and displaying a test result of the composite alarm device. And
[0029]
Here, the gas test unit is a gas detector for the gas leak alarm circuit unit when the test switch is operated or every time set by the timer.Noh testThe test result is stored and held, and the test signal sending unit sends the test signal to the gas test unit to output a test response signal indicating the stored test result.
[0030]
The test processing unit is incorporated into an external tester connected via a repeater that disconnects the sensor line from the disaster prevention information board. The test processing unit may be incorporated in the disaster prevention information board.
[0031]
For this reason, the fire detector circuit part of the composite type alarm is electrically separated from the power supply from the commercial AC power supply and operates by receiving the power supply from the sensor line in the same way as a normal fire detector.And also fireGas leak warning as with the disaster detector circuitInformation circuitCan also be tested remotely.
[0032]
For the gas leak alarm circuit unit, the test result of the gas detection function by the test switch or timer is stored and held, and this is returned by the test signal by the remote test from the sensor line, and the test result of the gas leak alarm circuit unit is displayed. Enable display. As a result, it is possible to perform a remote test from the sensor line that effectively utilizes the test function of the gas leak alarm circuit.
[0033]
Moreover, the power failure countermeasures of the fire detector circuit section provided in the composite alarm device can be taken in the same way as the fire detector, and it is not necessary to increase the capacity of the standby power supply. There is no need to install a fire detector in the kitchen.
[0034]
The gas leak alarm circuit, InspectionA pulse signal with a different pulse width and period is electrically separated according to the signal corresponding to the type of gas to be output, and then sent to the detector circuit via the fire detector circuit. The test result is stored and held, and a test response signal indicating the test result for each gas type is output by the test signal from the test signal sending unit.
[0035]
Furthermore, the present invention provides a composite alarm device that has a fire alarm function and a gas leak alarm function, and is connected to the sensor line together with the fire detector to monitor fire and gas leaks. The alarm operates with the power supply from the commercial AC power supply, and operates with the gas leak alarm circuit part that performs gas leak alarm when detecting gas and the power supply from the sensor line, and detects the fire alarm signal when a fire is detected. A fire detector circuit unit that outputs a fire alarm signal and outputs a fire alarm signal that is electrically separated to the gas leak alarm circuit unit, and a gas detection function of the gas leak alarm circuit unit The gas test unit to be tested and the test signal received from the sensor line are electrically separated and sent to the gas test unit., TryA test signal sending unit that outputs a test response signal indicating a test result, and a test response signal sending unit that sends the test response signal from the gas test unit to the sensor line via the fire detector circuit after being electrically separated. And a type signal sending unit for sending a type signal indicating the type of the composite alarm device together with the test response signal. Other features are the same as those of the disaster prevention monitoring facility.
[0036]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is an explanatory diagram showing the equipment configuration in a dwelling unit in the disaster prevention monitoring equipment according to the present invention.
[0037]
In FIG. 1, a disaster prevention information panel 1 is installed in each dwelling unit of the apartment house, and sensor lines 2 a and 2 b functioning as power source signal lines are drawn out from the disaster prevention information panel 1 into the dwelling unit. One or a plurality of fire detectors 3 having a remote test function are connected to the detector lines 2a and 2b, and a termination resistor 4 for monitoring disconnection is connected to the termination of the detectors 2a and 2b.
[0038]
The disaster prevention information board 1 is connected to the housing building receiving board installed in the manager room by the transmission line 60a. The power line 60b is also connected to a power supply apparatus installed in the manager's room, and a backup power supply apparatus is connected to the power supply apparatus so that power backup can be performed in the event of a power failure.
[0039]
Furthermore, in the present invention, the composite alarm 5 having a fire alarm function and a gas leak alarm function is connected to the sensor lines 2a and 2b in the same manner as the fire sensor 3. As will be clarified in the following description, the composite alarm 5 operates with the gas leakage alarm circuit unit receiving power supplied by a commercial AC power supply AC 100 volts, and the fire detector circuit unit is prepared for disaster prevention. It operates by receiving power supply from the information board 1 through the sensor lines 2a and 2b. The fire detector circuit unit has a remote test function in the same manner as the fire detector 3. The gas leak alarm circuit unit also has a remote test function that will be clarified in the following description.
[0040]
When fire detection is performed in the fire detector circuit section of the composite alarm device 5, the fire resistance 3 is made to have a low impedance between the sensor lines 2a and 2b and the alarm current flows, so that the disaster prevention information panel 1 Fire alarm signal is sent out.
[0041]
The disaster prevention information panel 1 is provided with functions of a fire monitoring unit 1a, a gas leak monitoring unit 1b, and a test processing unit 1c as necessary. The 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 a sound alarm indicating the operation of the sensor in the dwelling unit. For this reason, even if there is a signal input corresponding to a short fire alarm signal with a delay time of less than 200 ms due to noise or the like, the fire monitoring unit 1a will not mistakenly determine a fire.
[0042]
The fire monitoring unit 1a, which has determined a fire from the fire alarm signal, starts a timer, determines the elapse of a predetermined time set in a range of, for example, 2 to 5 minutes, and when the resident presses the confirmation switch button during this period, A fire confirmation signal is sent to the reception board (not shown) of the manager's room via the transmission line 60a to perform a fire alarm operation. When there is no operation of the confirmation switch button by the resident, a fire confirmation signal is sent to the residence building receiving board at the time when the timer set time has elapsed, and the fire alarm operation is similarly performed.
[0043]
When gas leak detection is performed in the gas leak alarm circuit portion provided in the composite alarm device 5, a pulse signal corresponding to the type of gas detected is sent via the sensor lines 2a and 2b.
[0044]
In the combined alarm device 5, for example, two types of gas leaks, methane gas (CH4) and carbon monoxide (CO), can be detected, and different pulse widths and periods corresponding to the detected gas types. A pulse signal having a signal is sent to the sensor lines 2a and 2b as a gas detection signal.
[0045]
The gas detection signal composed of this pulse signal is identified after being received by the gas leak monitoring unit 1b of the disaster prevention information panel 1, and a gas leak alarm or a CO ventilation alarm is given. Of course, the gas leak alarm and the CO ventilation alarm are also performed by the composite alarm device 5 itself.
[0046]
In the present invention, the repeater 6 is provided on the sensor lines 2a and 2b on the disaster prevention information panel 1 side, and the external tester 7 is connected to the repeater 6 installed outside the dwelling unit during the remote test. Connect with a connector cable. When the test switch is operated by the external tester 7, the relay in the repeater 6 is activated, disconnecting the sensor lines 2a and 2b from the disaster prevention information panel 1 and switching to the external tester 7 side.
[0047]
In this state, the external tester 7 sends a test signal (test command) while sequentially designating the address of the fire detector 3 including the composite alarm device 5 to perform a remote test. Regarding the remote test of the fire detector circuit part of the fire detector 3 and the combined type alarm device 5, it is judged as normal if the alarm signal from the test is received, and judged as abnormal if the alarm signal is not received. Display the results.
[0048]
On the other hand, in the remote test of the gas leak alarm circuit part of the composite alarm device 5, the test results of the gas leak detection and CO gas detection that are performed and stored on the alarm device side are the types of alarm devices. Returned with signal.
[0049]
In the remote test, the test processing unit 1 c may be provided in the disaster prevention information panel 1 without using the external tester 7. In this case, the repeater 6 need not be provided. Of course, both the test processing unit 1c and the external tester 7 may be provided. As the external tester 7, for example, a remote tester disclosed in JP-A-11-259787 can be used.
[0050]
FIG. 2 is a circuit block diagram showing an embodiment of the composite alarm device 5 of FIG. The composite alarm device 5 used in the present invention is composed of a gas leak alarm circuit unit 5A and a fire detector circuit unit 5B.
[0051]
The gas leakage alarm circuit unit 5A includes a noise absorption circuit 8a, a power transformer 8b, a power supply circuit unit 8 including a rectifier circuit 8c and a constant voltage circuit 8d, a microcomputer circuit 9 including an MPU and a memory, a gas detection circuit 10a, and a gas sensor drive. Display including a circuit 10b, a gas detection circuit unit 10 including a temperature compensation circuit 10c, a gas alarm concentration setting circuit 13, a power lamp 14a, a fire lamp 14b, a gas leak lamp 14c, a CO gas leak lamp 14d, and a failure lamp 14e Light circuit 14, fire alarm contact output circuit 22 for outputting no-voltage contact signal, outside for outputting voltage signalPartA force circuit 23 is provided.
[0052]
On the other hand, the fire detector circuit unit 5B includes a fire detector circuit 18 and a fire alarm signal transmission circuit 19. The fire detector circuit 18 is connected to the detector lines 2a and 2b from the disaster prevention information panel 1 of FIG. When a fire is detected by the fire detector circuit 18, a fire alarm signal is sent to the disaster prevention information panel 1 in FIG. 1 by causing the alarm current to flow between the sensor lines 2a and 2b with a low impedance. At the same time, the fire detector circuit 18 outputs a fire alarm signal to the fire alarm signal transmission circuit 19.
[0053]
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 the fire alarm signal is received from the fire detector circuit 18, the light emitting unit 20a is driven to emit light. The fire alarm signal receiving circuit 21 on the gas leak alarm circuit unit 5A side is provided with a light receiving part 2b using a phototransistor of the photocoupler 20, and receives light emitted by the fire alarm signal from the light emitting part 20a. The phototransistor of the light receiving unit 2b is turned on, and a fire alarm signal is input from the fire alarm signal receiving circuit 21 to the microcomputer circuit 9 to perform a fire alarm operation.
[0054]
Thus, the gas leak alarm circuit unit 5A and the fire detector circuit unit 5B are electrically separated by the fire alarm signal transmission circuit 19 and the fire alarm signal receiver circuit 21 using the photocoupler 20.
[0055]
The combined alarm device 5 in FIG. 2 further converts the gas leak signal when the microcomputer circuit 9 detects a gas leak of methane gas and the CO ventilation signal when the carbon monoxide gas is detected into unique pulse signals. A signal transmission circuit unit for converting and transmitting as a gas detection signal is provided. The signal transmission circuit unit includes a gas leak signal transmission circuit 24, a CO ventilation signal transmission circuit 25, an OR circuit 26, a photocoupler 27, and a signal reception / transmission circuit 28.
[0056]
The gas leak signal transmission circuit 24 outputs a pulse signal having a predetermined pulse width and period when the gas leak signal from the microcomputer circuit 9 is input. When receiving the CO ventilation signal from the microcomputer circuit 9, the CO ventilation signal transmission circuit 25 outputs a pulse signal having a predetermined pulse width and cycle different from those of the gas leak signal transmission circuit 24.
[0057]
Pulse signals from the gas leakage signal transmission circuit 24 and / or the CO ventilation signal transmission circuit 25 are input to the OR circuit 26 to drive the light emitting unit 27a formed of LEDs of the photocoupler 27 to emit light.
[0058]
Light from the light emitting unit 27 a is received by the light receiving unit 27 b using the phototransistor of the photocoupler 27 and input to the signal transmission / reception transmission circuit 28. The signal receiving / transmitting circuit 28 receives the gas leakage signal or the CO ventilation signal electrically separated through the photocoupler 27, outputs a corresponding pulse signal to the fire detector circuit 18, and the detector lines 2a and 2b. To send a pulse signal in the current mode.
[0059]
FIG. 3 is a time chart of a pulse signal transmitted from the signal transmission circuit unit of FIG. FIG. 3A shows a pulse signal corresponding to the CO ventilation signal, where the pulse width is set to 50 ms and the period is set to 300 ms. FIG. 3B shows a pulse signal corresponding to the gas leakage signal, which has a pulse width of 5 ms and a pulse period of 30 ms.
[0060]
The pulse width and period of each pulse signal corresponding to the CO ventilation signal and gas leak signal are set to prevent malfunction due to noise of the fire alarm signal received by the fire monitoring unit 1a of the disaster prevention information panel 1 of FIG. The pulse signal is set so as to be distinguished from the delay time, for example, the delay time of 200 ms.
[0061]
That is, in the fire monitoring unit 1a provided in the disaster prevention information panel 1 of FIG. 1, it is determined that the true fire alarm signal is received when the fire alarm signal continues for a delay time of 200 ms. 3A and 3B, in order to be able to distinguish and receive each pulse signal corresponding to the CO ventilation signal and the gas leakage signal in FIGS. 3A and 3B, the CO ventilation signal has a pulse width of 50 ms, a period of 300 ms, and a gas leakage signal. Has a pulse width of 5 ms and a period of 30 ms.
[0062]
As described above, the pulse signal corresponding to the CO ventilation signal is a cycle in which a pulse signal having a pulse width of 50 ms is output and then stopped for 250 ms, and the pulse signal corresponding to the gas leak signal corresponds to the CO ventilation signal. It is a pulse signal with a pulse width of 1/10 and a cycle of 1/10, that is, 10 times the frequency, and clearly for the fire alarm signal that is judged to be received when the delay time in the disaster prevention information panel lasts 200 ms. Can be identified.
[0063]
Since the OR circuit 26 takes the logical sum of each pulse signal corresponding to the gas leakage signal and the CO ventilation signal, the CO ventilation signal as shown in FIG. A pulse signal that combines the gas leak signal is sent out. Even if the CO ventilation signal and the gas leakage signal are sent simultaneously, the continuous pulse width does not exceed 55 ms. Therefore, the pulse signal is not erroneously received as a fire alarm signal on the disaster prevention information panel side.
[0064]
Further, there may be a plurality of composite alarm devices 5 installed in each dwelling unit of the apartment house. For example, in FIG. 1, even if the worst condition in which three composite alarm devices 5 are connected to the sensor lines 2a and 2b is considered,
(50 ms × 3) + (5 ms × 3) = 165 ms
The continuous pulse width is 165 ms, and the delay time 200 ms that the disaster prevention information panel 1 judges to receive the fire alarm signal is not exceeded, and the CO ventilation signal and the gas leak signal are sent simultaneously as shown in FIG. Even if it is, the disaster prevention information panel 1 side does not mistakenly determine that the pulse signal is the reception of the fire alarm signal.
[0065]
Of course, in this embodiment, it is determined on the condition that the maximum number of combined alarm devices is the pulse width and period of the CO ventilation signal and gas leakage signal, but the fire occurrence of the disaster prevention information panel 1 is determined. An appropriate pulse width and cycle may be set within a range that is not erroneously determined as a fire alarm signal in consideration of a delay time until the alarm signal is received and its identification capability.
[0066]
The output signal from the combined alarm device 5 in FIG. 2 to the sensor lines 2a and 2b is also sent in the current mode for the CO ventilation signal and the gas leakage signal using the pulse signal, whereas the disaster prevention information in FIG. In the panel 1, the line current is received as the voltage across the resistor inserted and connected to the sensor line 2a, for example. For example, the reception voltage is as follows.
(1) 1.5 to 2.5 volts during normal monitoring (with termination resistor)
(2) 1.0 volts or less when disconnected
(3) 4.0 to 5.0 volts when receiving signals
Specifically, the pulse signals corresponding to the fire alarm signal, the CO ventilation signal, and the gas leak signal are superimposed on the voltage level of the normal monitoring state by sending the pulse signal of the fire alarm signal and the gas detection signal. The signal is received and taken in by AD conversion of the microcomputer circuit built in the disaster prevention information board 1 side, the signal is identified, and alarm display and alarm output are performed by the fire monitoring unit 1a and the gas leakage monitoring unit 1b.
[0067]
Next, a configuration for a remote test on the gas leak alarm circuit unit 5A of the composite alarm device 5 of FIG. 2 will be described.
[0068]
First, the fire detector circuit 18 is provided with a test signal sending circuit 48 and a type signal sending circuit 49 for a remote test on the gas leak alarm circuit unit 5A side. The test signal transmission circuit 48 and the type signal transmission circuit 49 are circuit units provided for a remote test on the side of the gas leak alarm circuit unit 5A in the fire detector circuit 18 which will be clarified later.
[0069]
The fire detector circuit 18 is provided with a test circuit (not shown) that functions as an interface circuit for receiving and identifying a test signal designating an alarm device address from the detector lines 2a and 2b. When the test signal for the test is received, the test signal transmission circuit 48 is operated, the light emitting unit 30a using the LED of the photocoupler 30 is driven to emit light, and the light receiving unit 30b using the phototransistor of the photocoupler 30 receives the light. The test signal electrically separated from the test signal receiving circuit 31 is input to the microcomputer circuit 9.
[0070]
On the other hand, the microcomputer 9 of the gas leak alarm circuit unit 5A is provided with a gas test unit 32 realized by the program control. The gas test unit 32 includes a timer 33, a gas sensor test control unit 34, a test result storage unit 35, and a test result output unit 36.
[0071]
The timer 33 operates the gas sensor test control unit 34 when the composite alarm device 5 enters a stable operation state after the power is turned on, and performs a test of the gas detection function. Thereafter, the timer 33 activates the gas sensor test control unit 34, for example, at a cycle of 24 hours or 240 hours, and tests the gas detection function.. The gas sensor test control unit 34The sensor driving circuit 10b and the gas alarm concentration setting circuit 13 are operated in the test mode to test the gas leak detection function for methane gas and the gas leak detection function for carbon monoxide, and the test results are stored in the test result storage unit 35. .
[0072]
Combined alarm 5Set inBy operating the test switch 29, the gas sensor test control unit 34 performs a test of the gas detection function regardless of the test cycle by the timer 33, and stores and holds the test result in the test result storage unit 35.
[0073]
The test of the gas detection function by the gas sensor test control unit 34 is performed by, for example, connecting a test resistor in parallel to the load resistance connected to each gas sensor provided in the gas detection circuit 10a to lower the resistance value. Test conditions for gas leak detection and carbon monoxide gas leak detection are created.
[0074]
When the test signal is received by the microcomputer circuit 9 from the fire detector circuit 18 via the photocoupler 30 and the test signal receiving circuit 31, the test result output unit 36 stores the methane gas stored in the test result storage unit 35 and The test result of the carbon monoxide gas detection is read and output to the OR circuit 26 as a 2-bit serial signal.
[0075]
That is, if each test result of methane gas and carbon monoxide is normal, each bit 1 is output, and if abnormal, each bit 0 is output. The OR circuit 26 drives the light emitting unit 27a of the photocoupler 27 to emit light with bit 1 of the 2-bit serial signal indicating the test result from the test result output unit 36, and the test result is received from the signal transmission / reception circuit 28 by light reception by the light receiving unit 27b. A pulse signal corresponding to each bit of is output to the detector lines 2a and 2b in the current mode via the fire detector circuit 18.
[0076]
At this time, the type signal sending circuit 49 provided in the fire detector circuit 18 is outputted to the detector lines 2a and 2b before sending the pulse signal of the 2-bit test result. Therefore, on the side of the external tester 7 in FIG. 1, after first receiving a test report signal as a test result of the fire detector circuit 18, the type signal is obtained as a result of the remote test on the gas leak alarm circuit unit 5A side. Then, a total of 3-bit signals that are 2-bit pulse signals corresponding to gas leakage and CO ventilation are received.
[0077]
The gas leak alarm circuit unit 5A stores the test result that has occurred uniquely in the test result storage unit 35, and when the test signal is received, the test result is returned as a response signal so that the test is performed after the test signal is received. Compared to performing it, the time required for remote testing of the entire system can be greatly reduced.
[0078]
FIG. 4 is a circuit block diagram illustrating an example of the fire detector circuit 18 of FIG. The fire detector circuit 18 includes a rectifier circuit 37, a noise absorbing circuit 38, a constant voltage circuit 39, a current limiting circuit 40, a heat detection circuit 41, a comparison circuit 43, a notification temperature setting circuit 42, and a fire signal output circuit 44. .
[0079]
The thermistor is provided in the heat detection circuit 41 as a temperature detection element, and the characteristic of the constant temperature sensor is obtained by converting the decrease in the thermistor resistance value due to the temperature rise into a voltage and comparing it with the set voltage of the alarm temperature setting circuit 42. Is realized.
[0080]
That is, when the detection signal from the heat detection circuit 41 exceeds a value corresponding to the set voltage of the alarm temperature setting circuit 42, the comparison circuit 43 outputs the signal, turns on the switching element such as the transistor of the fire signal output circuit 44, and the terminal L , C, the fire alarm signal is transmitted to the disaster prevention information panel 1 by causing the alarm current to flow between the sensor lines 2a and 2b connected to C and C.
[0081]
A light emitting unit 20 a of the photocoupler 20 of FIG. 2 is connected in series with the fire signal output circuit 44. For this reason, when a fire detection operation is performed in the fire detector circuit 18 and a notification current flows between the detector lines 2a and 2b, the light emitting portion 20a of the photocoupler 20 is driven to emit light at the same time. A light receiving output is performed on the light receiving unit 20 b side of the coupler 20, and a fire alarm signal is input to the microcomputer circuit 9 via the fire alarm signal receiving circuit 21.
[0082]
The fire signal transmission circuit 44 is connected to a phototransistor serving as the light receiving portion 27b of the photocoupler 27 in FIG. 2 is built in the fire signal output circuit 44.
[0083]
For remote testing of the fire detector circuit 18, the test circuit 46 functions as an interface circuit for receiving and discriminating a test signal designating a self-address from the sensor line, and is operated by the test signal from the test circuit 46 and the comparison circuit 43. Is provided with a switch circuit 47 for performing a test operation for setting the same operation state as when a fire is detected to send an alarm signal.
[0084]
Further, for a remote test of the gas leak alarm circuit unit, a test signal that operates according to the test signal output from the test circuit 46 to drive the photocoupler light emitting unit 30a to emit light and send the test signal to the gas leak alarm unit 5A side. The sending circuit 48 is also provided with a type signal sending circuit 49 that is activated by a test signal from the test circuit 45 and sends a type signal indicating the type of the result of the remote test on the gas leak alarm circuit unit 5A side.
[0085]
On the other hand, the fire detector 3 with a remote test function in FIG. 1 includes a test signal transmission circuit 48 and a type signal provided for a remote test from the fire detector circuit 18 in FIG. The circuit configuration is such that the sending circuit 49 is excluded.
[0086]
Next, the operation of the disaster prevention monitoring facility and the composite alarm device of the present invention will be described. As shown in FIG. 2, the combined alarm device 5 connected to the detector lines 2a and 2b from the disaster prevention information panel 1 is connected to the fire detector circuit by supplying power from the detector lines 2a and 2b. The fire is received at 18 and monitored. Each circuit of the fire detector circuit unit 5B operates by receiving power supply from the detector lines 2a and 2b.
[0087]
At the same time, the commercial AC power supply AC100 volts is supplied, and the power supply circuit unit 8 generates a specified DC power supply voltage to be supplied to each circuit unit, for example, DC 5 volts, and operates the gas leakage alarm circuit unit 5A side.
[0088]
If a fire is detected by the fire detector circuit 18 having the circuit configuration shown in FIG. 4 in this state, the alarm current is made to flow between the detector lines 2a and 2b with a low impedance, and a fire is caused to the disaster prevention information panel 1. Send an alert signal. The fire monitoring unit 1a of the disaster prevention information panel 1 that has received the fire alarm signal displays a fire alarm and informs the dwelling unit of the operation of the fire detector by a voice alarm.
[0089]
If the confirmation switch button provided in the disaster prevention information panel 1 is turned on within a predetermined time, for example, in the range of 2 to 5 minutes from the reception of the fire alarm signal, the transmission line 60a is used for the housing ridge receiving board (not shown). A fire confirmation signal is sent out, and a fire occurrence display and an alarm display are made on the receiving side of the residence building. If the confirmation operation is not performed within the predetermined time, the disaster prevention information panel 1 sends a fire confirmation signal to the residence building reception panel at the elapse of the predetermined time, and similarly causes a fire occurrence display and an alarm.
[0090]
On the other hand, in the combined alarm device 5 of FIG. 2, the fire detector circuit 18 sends out the fire alarm signal simultaneously with the transmission of the fire alarm signal to the sensor lines 2a and 2b. The sending circuit 19 is operated to drive the light emitting portion 20a of the photocoupler 20 to emit light. The light emitting output is received by the light receiving portion 20b, and the fire alert signal is input from the fire alert signal receiving circuit 21 to the microcomputer circuit 9. .
[0091]
Receiving the fire alarm signal, the microcomputer circuit 9 operates the indicator lamp circuit 14 and turns on the fire lamp 14b. Further, the voice alarm output circuit 15 is activated, and a voice alarm such as “Peep, fire alarm has been activated. Please confirm” is output from the speaker 16. Further, by closing the contact a of the fire alarm contact output circuit 22, a non-voltage contact signal can be output to the outside, and for example, a gas emergency shutoff valve can be shut off.
[0092]
On the other hand, in the gas detection circuit unit 10 on the gas leak alarm circuit unit 5A side, an output voltage corresponding to city gas (methane gas) or carbon monoxide gas is input to the microcomputer circuit 9, and the set concentration by the gas alarm concentration setting circuit 13 is set. When it exceeds, it will be in a gas leak alarm state, and the indicator lamp circuit 14 lights the gas leak lamp 14c or the CO gas leak lamp 14b.
[0093]
Further, when the loudspeaker 16 is driven by the voice alarm output circuit 15, for example, in the case of gas leak, a voice alarm such as “Are there any gas leaks?” Is output. In the case of CO gas, an audio alarm such as “Pippippo, dangerous because the air is dirty. Open a window and ventilate” is output. Furthermore, when a fire and a gas leak overlap, a sound alarm output giving priority to a fire alarm is performed.
[0094]
In addition, the microcomputer circuit 9 gives an instruction to the external output circuit 23 when the gas leak alarm state is reached, and outputs a voltage signal of 12V to the outside when the gas leak (methane gas) is detected and 18V when the carbon monoxide gas is detected. Let This output signal of the voltage signal is used as a control output of a microcomputer meter, for example.
[0095]
On the other hand, when a power failure occurs in the dwelling unit during monitoring, the commercial AC power supply AC 100 volts is cut off, and the operation of the gas leak alarm circuit unit 5A in FIG. 2 stops. However, since the fire detector circuit unit 5B is operated by receiving power supply from the detector lines 2a and 2b, the fire monitoring function is not lost even if a power failure occurs in the dwelling unit.
[0096]
When the microcomputer circuit 9 detects the gas leak because the methane gas reaches the alarm gas concentration, a gas leak signal is output to the gas leak signal transmission circuit 24, and the gas leak signal transmission circuit 24 is shown in FIG. A pulse signal having a pulse width of 5 ms and a period of 30 ms is output to the OR circuit 26.
[0097]
The OR circuit 26 drives the light emitting portion 27a of the photocoupler 27 to emit light by the input pulse signal, and inputs the pulse signal indicating gas leakage electrically separated through the light receiving portion 27b to the signal receiving / transmitting circuit 28, and fires. A pulse signal is sent in the current mode to the sensor line via the sensor circuit 18.
[0098]
The pulse signal is transmitted by the light receiving unit 27 of the photocoupler as the switching element of the fire signal output circuit 44 of FIG.bIs turned on and off by the received light output of the signal, and a pulse signal is sent to the sensor lines 2a and 2b in the current mode.
[0099]
The pulse signal from the composite alarm device 5 is received by the disaster prevention information panel 1 of FIG. 1, and is added to the received voltage that is 1.5 to 2.5 volts in the normal monitoring state, and is 4.0 to 5.0 volts. The gas leakage monitoring unit 1b recognizes the gas leakage signal from the pulse width and its period, and the gas leakage warning lamp is turned on by the lighting of the gas leakage alarm lamp and the sound alarm in the disaster prevention information panel 1. It is.
[0100]
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 a pulse signal having a period of 300 ms and a period of 50 ms corresponding to the CO ventilation signal of FIG. 1 is sent between the sensor lines 2a and 2b, the CO ventilation signal is identified by the gas leakage monitoring unit 1b of the disaster prevention information panel 1 of FIG. 1, and an alarm display and an audio alarm output for ventilating are performed.
[0101]
FIG. 5 is a time chart of the remote test operation of the composite type alarm by the external tester 7 of FIG.
[0102]
When the test signal is sent from the remote tester 7 by designating the address of the composite alarm device of FIG. 2, the test signal 46 is provided in the fire detector circuit 18 to discriminate the test signal by the self address. A test signal having a period T1 from time t1 to time t6 in FIG. 5A is output to the switch circuit 47, the test signal transmission circuit 48, and the type signal output circuit 49.
[0103]
In response to this test signal, first, the switch circuit 47 is operated at time t2 shown in FIG. 5B, the comparison circuit 43 is operated in the same manner as when a fire is detected, and if the fire signal output circuit 44 is normal, the test result is obtained. As shown in FIG. 5B, the test report signal is sent to the sensor lines 2a and 2b over the pulse width T2.
[0104]
Subsequently, at time t3 in FIG. 5C, the type signal output circuit 49 outputs a type signal indicating the type of the result of the remote test on the gas leakage alarm circuit unit 5A side as a pulse signal having a pulse width T3.
[0105]
On the other hand, when the test signal sending circuit 48 in FIG. 4 receives the test signal at time t1, the light emitting unit 30a of the photocoupler 30 is driven to emit light, and the test signal is sent to the microcomputer circuit 9 via the test signal receiving circuit 31 in FIG. input.
[0106]
The microcomputer circuit 9 that has received the input of the test signal operates the test result output unit 36 provided in the gas test unit 32 and stores each gas of methane gas and carbon monoxide gas stored in the test result storage unit 35. The leak detection test result is read, and if the two test results are both normal, a 2-bit serial signal which is bit 1 is converted into a gas leak test response signal and CO at times t4 and t5 in FIGS. Output ventilation test response signal. The pulse widths of the gas leak test response signal and the CO ventilation test response signal are T3, similar to the type return signal.
[0107]
The 2-bit serial signal from the test result output unit 36 is directly supplied to the OR circuit 26, drives the light emitting unit 27a of the photocoupler 27 to emit light, is received by the light receiving unit 27b, and is received by the signal receiving / transmitting circuit 28. The pulse signal is output to the sensor lines 2a and 2b through the fire signal output circuit 44 of FIG.
[0108]
Therefore, the external tester 7 of FIG. 1 receives the test report signal, the type signal, the gas leak test response signal, and the CO ventilation test response signal as shown in FIG. The fact that the remote test results are normal for both the fire detection function and the gas detection function in the alarm 5 is displayed.
[0109]
FIG. 5 (G) is a received signal in the external tester 7 when each test result of the fire test and the gas leak test is abnormal. In this case, the external tester 7 uses the fire detection function of the composite alarm device 5. There is an abnormality, and further, it is displayed as a test result that there is an abnormality in the gas leak detection function.
[0110]
FIG. 6 is an explanatory view showing an embodiment of the test processing unit 1c provided in the disaster prevention information panel 1 of FIG.
[0111]
In FIG. 6, the disaster prevention information panel 1 is provided with a signal transmission / reception circuit 50, a microcomputer circuit 51 having an MPU and a memory, a display panel 52, a test switch 53, and an alarm sound circuit 54 having a speaker 55.
[0112]
The microcomputer circuit 51 is provided with a data signal identification unit 56 for identifying the test report signal, the type signal, the gas leak test response signal, and the CO ventilation test response signal from the signal received by the signal transmission / reception circuit 50. Further, a timer 57 and a test signal pulse voltage superimposing unit 58 are provided as the test processing unit 1c.
[0113]
The timer 57 operates the test signal pulse voltage superimposing unit 58 at predetermined time intervals, and sequentially assigns the addresses of the fire detector 3 and the composite alarm device 5 between the sensor lines 2a and 2b via the signal transmission / reception circuit 50. To output a test signal (test command). The signal pulse composed of the address and the test signal is transmitted as a voltage signal superimposed on the power supply voltage for the sensor lines 2a and 2b.
[0114]
In the timer 57, since the set time by the test timer 33 provided in the microcomputer circuit 9 of the composite alarm device 5 in FIG. 2 is 24 hours or 240 hours, the overlap with this time is avoided. Therefore, for example, the test signal pulse voltage superimposing unit 58 is periodically operated for 25 hours or 250 hours to output a test signal.
[0115]
As described above, when the remote test based on the test signal from the disaster prevention information panel 1 is performed in the fire detector 3 and the fire alarm circuit portion of the combined alarm device 5 and the gas leak alarm circuit portion, the test response indicating the respective test results. The signal is received by the signal transmission / reception circuit 50, identified by the data signal identification unit 56, and the test result is displayed on the display panel unit 52.
[0116]
In addition, by operating the test switch 53 provided in the disaster prevention information panel 1, the test signal pulse signal superimposing unit 58 is operated and the test signal is sent to the terminal side regardless of the test cycle by the timer 57, and the fire detector 3 and the composite type alarm 5 can be remotely tested. The test operation using the test switch 53 can be effectively used for, for example, a remote test during installation work.
[0117]
In the embodiment of FIG. 2, the external output circuit 23 for transfer that outputs the voltage signal from the composite alarm device 5 to the outside is provided, but this circuit may be omitted.
[0118]
2 and 5, the gas leakage signal transmission circuit 33 and the CO ventilation signal transmission circuit 34 are provided from the microcomputer circuit 9.The mothAlthough the predetermined pulse signal is output by inputting the leakage signal and the CO ventilation signal, the predetermined pulse signal may be directly output from the microcomputer circuit 9. In this case, the microcomputer circuit 9 incorporates a part of the function of the signal transmission circuit unit.
[0119]
Moreover, in the gas leak detection circuit unit of the above embodiment, two types of gas leaks, methane gas and carbon monoxide gas, are detected, but only one of the gases is detected. Also good.
[0120]
In the above embodiment, the gas detection signal is used.No. and test response signalThe pulse signal transmission method was used to output to the sensor line, but the transmission method is not limited to this. For example, a transmission circuit for exchanging information with the disaster prevention information panel is provided in the fire detector circuit, and transmission is performed. Gas detection signalNo. and test response signalIt is possible to use a known transmission method such as outputting to a sensor line.
[0122]
Moreover, in the above embodiment, as an installation place of the disaster prevention monitoring equipment and the composite type alarm device, an apartment house or a detached house was taken as an example, but the present invention is not limited to this, and the inn, the hotel It can also be applied to accommodations such as restaurants, restaurants, and office buildings.
[0123]
In the above embodiment, the sensor line to which the fire detector and the composite type alarm are connected is drawn directly from the disaster prevention information panel. The fire alarm signal and the gas detection signal may be sent to the disaster prevention information board or the residence building reception board via the repeater.
[0124]
Further, in the above embodiment, the constant temperature type sensor using a thermistor as shown in FIG. 4 is taken as an example of the fire detector circuit 18, but other than that, a photoelectric smoke detector or the like is used. Sensor configurations may be used.
[0125]
【The invention's effect】
As described above, according to the present invention, the fire detector circuit unit of the composite type alarm is electrically separated from the power supply from the commercial AC power supply, and is similar to a normal fire detector from the sensor line. Operates with power supply, and can remotely test the gas leak alarm circuit part as well as the fire detector circuit part of the composite alarm device. The detector circuit unit can be remotely tested together with a normal fire detector, facilitating maintenance and maintaining the reliability of the equipment.
[0126]
For the gas leak alarm circuit unit, the test result of the gas detection function by the test switch or timer is stored and held, and this is returned by the test signal by the remote test from the sensor line, and the test result of the gas leak alarm circuit unit is displayed. This makes it possible to perform a remote test from a sensor line that effectively utilizes the test function of the gas leak alarm circuit.
[0127]
Furthermore, the power failure countermeasures of the fire detector circuit provided in the composite alarm device can be taken in the same way as the fire detector, and it is not necessary to increase the capacity of the standby power supply. There is no need to install a fire detector in the kitchen.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram 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 composite alarm device of FIG.
3 is a time chart of a pulse signal transmitted by the signal transmission circuit unit of FIG.
4 is a circuit block diagram of the fire detector circuit of FIG.
Fig. 5 Time chart of test operation by remote test
FIG. 6 is a block diagram of a test processing unit provided in the disaster prevention information board according to the present invention.
FIG. 7 is an explanatory diagram of conventional equipment connected to a gas leak alarm.
FIG. 8 is a circuit block diagram showing a conventional composite alarm device.
[Explanation of symbols]
1: Disaster prevention information board
1a: Fire monitoring department
1b: Gas leak monitoring unit
1c: Test processing section
2a, 2b: Sensor line
3: Fire detector
4: Termination resistance
5: Combined alarm
6: Repeater
7: External tester
8: Power circuit
9: Microcomputer circuit
10: Gas detection timesRoad
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, 27, 30: Photocoupler
20a, 27a, 30a: light emitting part
20b, 27b, 30b: light receiving part
21: Fire alarm signal receiving circuit
22: Fire alarm contact output circuit
23: External output circuit
24: Gas leak signal transmission circuit
25: CO ventilation signal transmission circuit
26: OR circuit
28: Signal transmission / reception circuit
29: Test switch
32: Gas test department
33: Timer
34: Gas sensor test controller
35: Test result storage unit
36: Test result output section
37: Rectifier circuit
38: Noise absorption circuit
39: Constant voltage circuit
40: Current limiting circuit
41: Heat detection circuit
43: Comparison circuit
42: Alarm temperature setting circuit
44: Fire signal output circuit
46: Test circuit
47: Switch circuit
48: Test signal transmission circuit
49: Type signal transmission circuit
50: Signal transmission / reception circuit
51: Microcomputer circuit
52: Display panel
53: Test switch
54: Alarm sound circuit
55: Speaker
56: Data signal identification unit
57: Timer
58: Test signal pulse voltage superposition section

Claims (8)

In disaster prevention monitoring equipment that monitors fire and gas leaks by connecting a combined alarm device with a fire alarm function and a gas leak alarm function together with a fire detector to the sensor line drawn from the disaster prevention information panel,
In the composite alarm device,
A gas leak alarm circuit that operates with power supplied from a commercial AC power source and issues a gas leak alarm when detecting gas,
It operates with power supply from the sensor line, and outputs a fire alarm signal to the disaster prevention information panel via the sensor line when a fire is detected, and is electrically separated into the gas leak alarm circuit unit. A fire detector circuit that outputs a warning signal and gives a fire alarm;
A gas test unit for testing the gas detection function of the gas leak alarm circuit unit;
A test signal sending unit for electrically separating a test signal received from the sensor line and sending it to the gas test unit, and outputting a test response signal indicating a test result;
A test response signal sending unit for electrically sending a test response signal from the gas test unit to the sensor line through the fire detector circuit unit after electrically separating the test response signal from the gas test unit;
A type signal sending unit for sending a type signal indicating the type of the composite alarm device together with the test response signal;
Provided,
A disaster prevention monitor characterized in that a test processing unit for transmitting the test signal and receiving the test response signal and the type signal and displaying the test result of the composite alarm device is provided on the sensor line side. Facility. In disaster prevention monitoring facility according to claim 1, wherein the gas test unit, memory retention test results performed test of the gas detection capability of the gas leak alarm circuit section every predetermined time by the operation time or timer of the test switch And the said test signal transmission part sends a test signal to the said gas test part, and outputs the test response signal which shows the test result currently memorize | stored and held, The disaster monitoring equipment characterized by the above-mentioned. In disaster prevention monitoring facility according to claim 1, wherein the test unit includes disaster prevention monitoring characterized that you incorporated into connected external tester via the repeater disconnecting the sensor lines from the disaster prevention information panel Facility. 2. The disaster prevention monitoring facility according to claim 1, wherein the test processing unit is incorporated in the disaster prevention information panel. In the disaster prevention monitoring facility according to claim 1,
The gas leak alarm circuit unit electrically separates pulse signals having different pulse widths and periods in accordance with a signal corresponding to the type of detection gas, and then sends the pulse signal to the sensor line via the fire sensor circuit unit. ,
The gas test unit performs a test for each gas type, stores and holds a test result, and outputs a test response signal indicating a test result for each gas type by a test signal from the test signal sending unit. Disaster prevention monitoring equipment. In a combined alarm device that has a fire alarm function and a gas leak alarm function, and is connected to the sensor line together with a fire detector to monitor fire and gas leaks,
A gas leak alarm circuit that operates with power supplied from a commercial AC power source and issues a gas leak alarm when detecting gas,
Operates with power supply from the sensor line, outputs a fire alarm signal to the sensor line when a fire is detected, and outputs an electrically separated fire alarm signal to the gas leak alarm circuit. A fire detector circuit unit for performing a fire alarm,
A gas test unit for testing the gas detection function of the gas leak alarm circuit unit;
Said sensor a test signal received from the line electrically separated delivered to the gas test unit, the test signal transmitting section for outputting a test response signal indicating test results,
A test response signal sending unit for electrically sending a test response signal from the gas test unit to the sensor line through the fire detector circuit unit after electrically separating the test response signal from the gas test unit;
A type signal sending unit for sending a type signal indicating the type of the composite alarm device together with the test response signal;
A combined type alarm device comprising: In composite alarm device according to claim 6, wherein the gas test unit stores the test results performed test of the gas detection capability of the gas leak alarm circuit section every predetermined time by the operation time or timer of the test switch The composite alarm device is characterized in that the test signal sending unit sends the test signal to the gas test unit and outputs a test response signal indicating the stored test result. The composite alarm device according to claim 6,
The gas leak alarm circuit unit, transmitted to the sensor lines via said fire detector circuit portion after electrically isolate the pulse signals of different pulse widths and periods in response to a signal corresponding to the type of detection gas And
The gas test unit performs a test for each gas type, stores and holds a test result, and outputs a test response signal indicating a test result for each gas type by a test signal from the test signal sending unit. A combined type alarm.

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