JPH06266979A - Checking device for fire alarm equipment - Google Patents

Abstract

PURPOSE:To attain a test operation in which a fire sensor can be actually operated by a few wiring for test. CONSTITUTION:A power supply voltage is impressed from a first detecting circuit 9 to a start end 5a of a signal line 5, and a termination 5b is connected through a terminating resistance 14 with a ground. Then, disconnection monitoring currents are allowed to independently run, and when the disconnection monitoring currents are cut, a disconnection detection signal is outputted. When line currents are more than a prescribed value, a fire detection signal is outputted by the alarm of a fire sensor 7. Also, the power supply voltage is impressed from a second detecting circuit 10 to a start end 6a of a signal line 6, and a termination 6b is connected with the ground. Then, the disconnection monitoring currents are allowed to independently run, and when the disconnection monitoring currents are cut, the disconnection detecting signal is outputted. At the time of checking, the start end 5a is separated from the output of the first detecting circuit 9, and connected with the ground by a first switch 12. At the same time, the termination 5b of the signal line 5 is separated from the terminating resistance 14, and connected with the output of the first detecting circuit 9 by a second switch 13. Then, the test operation of the fire sensor 7 is executed by a testing circuit 15, and the result is informed on a display part 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for inspecting a fire alarm system for remotely inspecting a fire detector by test operation,
In particular, the present invention relates to a fire alarm facility inspection device for inspecting a sensor installed in a condominium or the like by an operation test.

[0002]

2. Description of the Related Art Conventionally, there is, for example, one shown in FIG. 5 as a fire alarm system installed in an apartment house or the like. In FIG. 5, a power line 30 and a sensor line 3 drawn from the receiver 1
1 and the common line 32 are connected to the repeater 3 installed in the dwelling unit. The repeater 3 is connected to a plurality of fire detectors 7 which are drawn out from the relay receiving unit 34 and connected to a detector line composed of a power line 5 and a common line 6. Further, the end of the sensor line is drawn into the repeater 3, and by connecting the terminating resistor 14, a weak monitoring current is made to flow in the steady monitoring state to monitor the disconnection. Further, an inspection switch 16 is provided in parallel with the terminating resistor 14. The inspection switch 16 is usually installed outside the dwelling unit so that the inspection can be performed without entering the dwelling unit.

When the fire detector 7 reports, the relay receiver 34
The receiving relay 35 provided in the
35b is closed and a fire signal is output to the house information panel in the dwelling unit, and at the same time, a fire detection signal is sent to the receiver 1 to output a fire alarm to the manager's room or the like. At the time of inspection, if the inspection switch 16 of the repeater 3 is turned on, the same line current as that issued by the fire detector 7 flows, and the repeater 3 can be operated on a trial basis.

When the sensor line in the dwelling unit is disconnected, the monitoring current by the terminating resistor 14 stops flowing, and the relay receiving unit 34 detects this and outputs a disconnection alarm.

[0005]

However, in such a conventional inspection device for fire alarm equipment, the operating state of the sensor is simulated by short-circuiting the terminal of the sensor line. There was a difficulty in checking whether the fire detector itself works. Therefore, in order to inspect the fire detector itself, for example, in the case of a heat detector, it may be possible to check whether or not the built-in heater works.

However, since a plurality of fire detectors are installed, the test lines 18a, 18b, ... 18n are provided for each heater 37 built in the fire detector 7, as shown in FIG.
It is necessary to check the output of the test circuit 36 by selectively connecting it with the rotary switch 38. For this reason, the wiring for the test becomes complicated, the construction of the equipment is difficult, and the cost is increased.

The present invention has been made in view of the above-mentioned conventional problems, and provides an inspection device for a fire alarm system capable of performing a test operation for actually operating a fire detector with a small amount of test wiring. With the goal.

[0008]

To achieve this object, the present invention is constructed as follows. The reference numerals in the drawings of the embodiments are also shown. First, the present invention is directed to the signal line 2 from the receiver 1.
Is connected to the repeater 3, and one or more fire detectors 7 are connected to the detector line consisting of the signal line 5 and the signal line 6 from the repeater 3, and the fire detection signal from the fire detector 7 is relayed. The inspection device of the fire alarm equipment that sends an alarm to the receiver 1 via 3 is targeted.

According to the present invention as such an inspection device, the power source voltage is applied to the starting end 5a of the signal line 5 drawn out from the repeater 3 and the terminal end 5b is grounded via the terminating resistor 14 to be disconnected independently. A first detection circuit 9 for supplying a monitoring current, outputting a disconnection detection signal when the disconnection monitoring current is interrupted, and outputting a fire detection signal when the line current is equal to or more than a predetermined value when the fire detector 7 is notified, A power supply voltage is applied to the starting end 6a of the signal line 6 drawn out from the repeater 3, and
There is provided a second detection circuit 10 for connecting b to the ground and independently supplying a disconnection monitoring current and outputting a disconnection detection signal when the disconnection monitoring current is interrupted.

At the time of inspection, the starting end 5a of the signal line 5 is first
An inspection switching circuit including a first switch 12 that is disconnected from the output of the detection circuit 9 and grounded, and a second switch 13 that disconnects the terminating end 5b of the signal line 5 from the terminating resistor 14 and is connected to the output of the first detection circuit 9. And a test circuit 15 for performing a test operation of the fire detector 7 in a switching state at the time of inspection by the inspection switching circuit, and a detection signal of a line current of a predetermined value or more is obtained from the first detection circuit 9 by the test operation by the test circuit 15. An inspection notification means 17 is provided to notify the normal operation of the sensor when the inspection is performed.

Here, the inspection command signal is sent from the receiver 1 to the repeater 3 to switch the inspection switching circuit to the inspection position, and the test circuit 15 is operated to perform the test operation of the fire detector 7. A detection signal of the first detection circuit 9 may be sent to the receiver as an inspection end signal indicating whether the inspection is normal. Further, according to the present invention, one or a plurality of fire detectors 7 are connected to the detector line composed of the signal line 5 and the signal line 6 from the receiver 1, and the fire detection signal from the fire detector 7 is sent to the receiver 1. It can be applied as it is to the inspection device of the fire alarm system that does not have a relay that outputs an alarm.

Further, in the fire detector 7, the first end 5a of the signal line 5 is provided with a current flowing in one direction from the start end toward the end.
The diode D1 is inserted and connected, and the start end 6a of the signal line 6 is connected.
A second diode D2 that allows a current to flow in one direction from the start end to the end is inserted and connected to the side, and a current flows in one direction from the cathode of the second diode D2 toward the anode of the first diode D1 during a test operation. The third diode D3 is connected.

Furthermore, an inspection switch 16 and inspection notification means 17 for instructing the test circuit 15 to perform a test operation are installed outside the dwelling unit.

[0014]

In the fire alarm system inspection device according to the present invention, the number of test signal lines for the fire detector is two.
All you have to do is add a book. Although the fire detectors are tested simultaneously, the fire detection signal can be obtained by the inspection operation only when all the fire detectors are operating normally, and the test operation of multiple fire detectors can be performed collectively. The time can be greatly reduced.

[0015]

FIG. 1 is a block diagram of an embodiment showing a first embodiment of the present invention, in which a fire detector is directly connected to a receiver. In FIG. 1, for example, two fire detectors 7 are connected to the signal line 5 and the signal line 6 which form the detector line drawn from the receiver 1.
The signal lines 5 and 6 are connected to the receiver 1 at their starting ends 5a and 6a and led out, and the ends 5b and 6b are returned to the receiver 1 again for terminal connection.

The receiver 1 is provided with a control circuit 11, and the control circuit 11 is followed by a first detection circuit 9 and a second detection circuit 10.
Is provided. The first detection circuit 9 is the signal line 5 of the sensor line.
The first end 5a of the first switch to the side a in the figure
The power supply voltage is applied via the switch 12. Correspondingly, the terminal 5b of the signal line 5 is connected to the terminal resistance 14 side which is grounded by the second switch 13 which is switched to the side a in the figure. The switching positions on the a side of the first switch 12 and the second switch 13 are the switching positions in the steady monitoring state, and therefore, the power supply from the first detection circuit 9 supplies the terminating resistor 14 via the signal line 5. Disconnection monitoring current (weak current) is flowing.

The second detection circuit 10 applies a power supply voltage to the starting end 6a side of the signal line 6. Corresponding to this, the terminal end 6b of the signal line 6 is directly grounded. This second detection circuit 1
When the power supply voltage is supplied by 0, a monitoring current for disconnection monitoring independently flows in the signal line 6. First switch 1
The second and second switches 13 are switched to the b side at the time of inspection. That is, the first switch 12 disconnects the power supply from the first detection circuit 9 to the signal line 5 by switching from the side a to the side b during inspection, and connects the starting end 5a of the signal line 5 to the ground. In addition, the second changeover switch 13 switches the terminal 5b of the signal line 5 from the side a to the side b at the time of inspection, and the terminal resistance 1
4 and switches to the power output from the first detection circuit 9. Therefore, the voltage polarities with respect to the starting end 5a and the terminating end 5b of the signal line 5 are opposite during steady monitoring and during inspection.

Further, the receiver 1 is provided with a test circuit 15, and a test operation line 18 and a test common line 19 are drawn from the test circuit 15 to the fire detector 7. Taking a heat detector as an example of the fire detector 7, a heater 8 is built in, and the heater 8 is connected in parallel to the test operation line 18 and the test common line 19 from the test circuit 15. In this embodiment, the test circuit 15 operates when the inspection switch 16 provided for the control circuit 11 is turned on, the heaters 8 incorporated in the fire detector 7 are energized all at once, and the heating of the heater 8 causes the fire detector 7 to operate. Is actually tested.

Here, the structure in the case where a heat detector is used as an example of the fire detector 7 will be described with reference to FIG. FIG. 2 shows a differential type heat sensor, in which an air chamber 25 partitioned by a diaphragm 21 is formed in the lower portion of the sensor body 20. A fixed contact 22 is provided on a portion of the sensor body 20 facing the diaphragm 21, and a contact 23 is provided on the diaphragm 21 facing the fixed contact 22. The air chamber 25 communicates with the outside through a minute leak hole 24. The fixed contacts 22 and the contacts 23 are connected to the sensor terminals 26 and 27. Further, the heater 8 is installed in the air chamber inside the sensor body 20 and connected to the test terminals 28 and 29.

When testing the fire detector, the test terminals 28,
By applying an operating voltage from 29 to the test circuit 15 provided in the receiver 1 of FIG. 1, the heater 8 is energized to heat the air chamber 25. The diaphragm 21 is pushed up by the heating of the air chamber 25 by the heater 8 to bring the contact 23 into contact with the fixed contact 22, thereby short-circuiting between the sensor terminals 26 and 27, a warning current flows, and a fire is detected by the test operation. Done. Of course, it is needless to say that the expansion of the air chamber 25 due to the heating of the heater 8 exceeds the escape from the leak hole 24.

Referring again to FIG. 1, the fire detector 7 is provided with external circuits each having diodes D1, D2 and D3 shown by broken lines. First, the diode D1 is inserted and connected so that a current flows in one direction from the start end 5a side of the signal line 5 to the end end 5b side. Similarly, the diode D2 is inserted and connected to the signal line 6 so that a current flows in one direction from the start end 6a side to the end end 6b side.

Further, the diode D3 is connected from the cathode side of the diode D2 to the anode side of the diode D1 so as to flow a warning current due to a test operation during inspection. The diodes D1 to D3 may be provided as an internal circuit of the fire detector 7, or may be provided as an external circuit on the detector base or the like. Next, the operation in the embodiment of FIG. 1 will be described separately for steady monitoring and inspection.

First, in the steady monitoring state, the first switch 12 and the second switch 13 provided in the receiver 1 are switched to the a side as shown in the figure. Therefore, the signal line 5 to which the fire detector 7 is connected by the power supply from the first detection circuit 9
A weak monitoring current for detecting disconnection flows from the starting end 5a to the terminating end 5b and further to the terminating resistor 14 via the second switch 13. At the same time, by the power supply from the second detection circuit 10, a monitoring current for disconnection monitoring flows from the starting end 6a of the signal line 6 to the terminating end 6b connected to the ground.

In such a steady monitoring state, if the signal line 5
Alternatively, when a disconnection occurs in the signal line 6, the control circuit 11 knows the disconnection from the first detection circuit 9 or the second detection circuit 10 due to the disconnection of the monitoring current, and issues a disconnection alarm display on the display unit 17. If the fire detector 7 operates due to a fire in the steady monitoring state, the signal line 5 side and the signal line 6 side of the fire detector 7 are short-circuited, and the starting end 5a of the signal line 5 and the diode D
1, the alarm current flows through the path that becomes the fire detector 7 and the terminal 6b of the signal line 6. Therefore, the first detection circuit 9 detects a line current exceeding a predetermined value, outputs a fire detection signal to the control circuit 11, and the display unit 17 outputs a fire alarm.

Next, the operation at the time of inspection will be described. At the time of inspection, as shown in FIG. 3, the first switch 12 and the second switch 13 of the receiver 1 are switched to the b side. By switching the first switch 12 and the second switch 13 to the b side, the power supply voltage from the first detection circuit 9 is applied to the terminal 5b side of the signal line 5, and the starting end 5a side is grounded. Then, when the inspection switch 16 is turned on, the control circuit 11 outputs an operation signal to the test circuit 15, and a drive voltage is applied from the test circuit 15 between the test operation line 18 and the test common line 19 to cause the fire detector 7 to operate. The heaters 8 provided in the above are heated and driven all at once.

When the heating drive of the heater 8 by the test circuit 15 is continued, the fire detector creates a short circuit state between the signal line 5 side and the signal line 6 side which are issued by the test. Here, when all the fire detectors 7 operate in the state where the contacts are short-circuited by the test, the terminal 5b of the signal line 5, the fire detector 7, by the power supply voltage applied from the terminal 5b side of the signal line 5,
Signal line 5 for diode D3, next fire detector 7
On the side, the next fire detector 7, the diode D3, the starting end 5a of the signal line 5, and the path from the b side of the first switch 12 to the ground, the alarm current for the test flows.

The alarm current flowing in the test operation of all the fire detectors 7 is detected by the first detection circuit 9 and a detection output is generated in the control circuit 11, and all the fire detectors 7 are inspected on the display unit 17. Informs that it has operated normally. Figure 4
Is an explanatory view showing a second embodiment of the present invention.
In the embodiment, the signal line 2 drawn from the receiver 1
Connect the repeaters 3a, 3b, ... to (repeater line),
Each of the repeaters 3a and 3b is provided with the same circuit as shown in the receiver 1 of FIG. 1, and a plurality of fire detectors 7 are connected to the detector line formed by the signal lines 5 and 6 from the repeaters 3a and 3b. It is characterized by being connected.

Here, the receiver 1 includes repeaters 3a, 3b, ...
・ Performing polling by specifying an address for. The repeaters 3a and 3b, which have been polled by the address designation from the receiver 1, return the detection state of the fire detector 7 and the disconnection state of the signal lines 5 and 6 to the receiver 1 at that time. Further, the receiver 1 can instruct the repeaters 3a, 3b, ...

The repeater 3 which receives the inspection command from the receiver 1
a, 3b, ... are the first switches 12 shown in FIG.
The test circuit 15 is operated at the same time when the second switch 13 is switched to the b side by the control signal from the control circuit 11. Then, when a fire detection signal is obtained from the first detection circuit 9 in the test operation of the fire detector 7 by the test circuit 15, the fire detector 7 connected to the relay device with respect to the receiver 1
An inspection end signal indicating that the test operation of (1) has been normally performed is responded.

In the above embodiment, the call from the receiver 1 to the repeater 3 is made by the polling method. However, as shown in FIG. 5, the signal lines 31 and 32 are short-circuited. A system that transmits a fire signal to the receiver 1 by doing so may be used. However, in this case, a repeater is provided outside the dwelling unit, and the inspection switch 16 is operated from outside the dwelling unit to perform the test.

In the above embodiment, the heater is built in the differential type heat sensor to perform the test operation. However, the heater is built in the constant temperature type heat sensor using the semiconductor sensor. Alternatively, the test operation may be performed. Further, regarding the scattered light smoke sensor, the test operation may be performed by driving the test LED to emit the same scattered light as at the time of a fire directly to the light receiving element.

Further, in the ionization type smoke detector, a test operation for forcibly setting the detection level from the ion chamber to the fire alarm level may be performed. The test operation of the fire detector for these inspections is not limited to the above example, and an appropriate method can be adopted. Further, as the receiver 1 shown in the embodiment of FIG. 1 or the repeaters 3a and 3b shown in the second embodiment of FIG. 4, the repeaters shown in FIG. 5 installed in each dwelling unit of an apartment house. 3 or a house information panel, and the repeater 3 shown in FIG. 5 in response to an operation of an inspection switch provided outside the dwelling unit or an inspection command from the receiver 1.
Alternatively, a test operation of the fire detector may be performed on the house information board, and the inspection result may be responded to in the dwelling unit or to the receiver 1.

[0033]

As described above, according to the present invention, since it is only necessary to add two test wirings, it is possible to simplify the equipment construction and suppress the cost increase. In addition, it is possible to perform the test operation of all fire detectors at the same time to know whether or not they are operating normally.Therefore, even if multiple fire detectors are installed in the receiver or repeater, the time required for inspection can be reduced. It can be greatly shortened, and the work efficiency can be greatly improved especially when the inspection work of each dwelling unit of an apartment house is performed from the outside.

[Brief description of drawings]

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

FIG. 2 is an explanatory diagram of a heat sensor used in the present invention.

FIG. 3 is a circuit diagram showing the operation during inspection of FIG.

FIG. 4 is an explanatory diagram showing another equipment configuration of the present invention.

FIG. 5 is an explanatory diagram of a conventional device that performs a pseudo test of a sensor.

FIG. 6 is an explanatory view of a conventional device for performing a test for operating a sensor.

[Explanation of symbols]

 1: receiver 2: signal line (repeater line) 3: repeater 5: signal line 6: signal line 5a, 6a: start end 5b, 6b: end 7: fire detector 8: heater 9: first detection circuit 10 : Second detection circuit 11: Control circuit 12: First switch 13: Second switch 14: Termination resistance 15: Test circuit 16: Inspection switch 17: Display unit (inspection notification means) 18: Test operation line 19: Test common line 20: Sensor main body 21: Diaphragm 22: Fixed contact 23: Contact 24: Leak hole 25: Air chamber 26, 27: Sensor terminal 28, 29: Test terminal

Claims (5)

[Claims] 1. A sensor comprising a repeater (3) connected to a signal line (2) from a receiver (1) and comprising a signal line (5) and a signal line (6) from the repeater (3). Connect one or more fire detectors (7) to the line, send a fire detection signal from the fire detector (7) to the receiver (1) via the relay (3), and output an alarm. In the fire alarm equipment, the power source voltage is applied to the starting end (5a) of the signal line (5) drawn out from the repeater (3), and the termination (5b) is applied.
Is connected to the ground via a terminating resistor (14) to independently supply a disconnection monitoring current, and when the disconnection monitoring current is disconnected, a disconnection detection signal is output, and the line is notified by the fire detector (7). A power supply voltage is applied to the first detection circuit (9) that outputs a fire detection signal when the current is equal to or higher than a predetermined value, and the starting end (6a) of the signal line (6) drawn from the repeater (3). With the end (6
a second detection circuit (10) that outputs a disconnection detection signal when the disconnection monitoring current is cut off by independently connecting b) to the ground, and the start end of the signal line (5) at the time of inspection. (5a) is the first
First to be separated from the output of the detection circuit (9) and connected to ground
The switch (12) and the terminal (5) of the signal line (5)
An inspection switching circuit including a second switch (13) for disconnecting b) from the terminating resistor (14) and connecting to the output of the first detection circuit (9), and a switching state during inspection by the inspection switching circuit. And a test circuit (15) for performing a test operation of the fire detector (7), and a test operation of the test circuit (15) provides a detection signal of a line current of a predetermined value or more from the first detection circuit (9). Inspection notification means (1)
7) And the inspection device of the fire alarm equipment, which is provided with. 2. The fire alarm facility inspection device according to claim 1, wherein an inspection command signal is sent from the receiver (1) to the repeater (3) to switch the inspection switching circuit to an inspection position. The test circuit (15) is operated to perform the test operation of the fire detector (7), and the detection signal of the first detection circuit (9) is used as an inspection end signal indicating whether the inspection result is normal or not. Fire alarm equipment inspection device characterized in that it is sent to. 3. One or more fire detectors (7) are connected to a detector line consisting of a signal line (5) from the receiver (1) and a signal line (6), and the fire detector (7) is connected. In a fire alarm system that sends a fire detection signal from the receiver (1) to output an alarm, a power supply voltage is applied to the starting end (5a) of the signal line (5) drawn from the receiver (1). Apply and terminate (5
By connecting b) to the ground via the terminating resistor (14), a disconnection monitoring current is independently flown, and when the disconnection monitoring current is disconnected, a disconnection detection signal is output, and the fire detector (7) issues a warning. A power supply voltage is applied to the first detection circuit (9) that outputs a fire detection signal when the line current is equal to or more than a predetermined value, and the starting end (6a) of the signal line (6) drawn from the receiver (1). Apply and terminate (6
a second detection circuit (10) that outputs a disconnection detection signal when the disconnection monitoring current is cut off by independently connecting b) to the ground, and the start end of the signal line (5) at the time of inspection. (5a) is the first
First to be separated from the output of the detection circuit (9) and connected to ground
The switch (12) and the terminal (5) of the signal line (5)
An inspection switching circuit including a second switch (13) for disconnecting b) from the terminating resistor (14) and connecting to the output of the first detection circuit (9), and a switching state during inspection by the inspection switching circuit. And a test circuit (15) for performing a test operation of the fire detector (7), and a test operation of the test circuit (15) provides a detection signal of a line current of a predetermined value or more from the first detection circuit (9). Inspection notification means (1)
7) And the inspection device of the fire alarm equipment, which is provided with. 4. The inspection device for fire alarm equipment according to claim 1 or 3, wherein the fire detector (7) extends from the start end to the end end on the start end (5a) side of the signal line (5). A first diode (D1) that allows a current to flow in one direction is inserted and connected, and a second diode (D2) that allows a current to flow in one direction from the start end to the end is inserted at the start end (6a) side of the signal line (6). A third diode (D3) which is connected and further causes a current during a test operation to flow in the position direction from the cathode of the second diode (D2) to the anode of the first diode (D1).
Fire alarm equipment inspection device characterized by connecting to. 5. The inspection device for fire alarm equipment according to claim 1 or 3, wherein an inspection switch (16) for instructing the test circuit (15) to perform a test operation and the inspection alarm means (1).
Fire alarm system inspection device characterized in that 7) is installed outside the dwelling unit.