JP3495023B2 - fire alarm - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire alarm system capable of remotely testing fire detectors scattered inside a dwelling unit from outside the dwelling unit.

[0002]

2. Description of the Related Art Conventionally, an operation test of a fire detector has been performed by actually adding heat or smoke using a heating tester or a smoke tester depending on the type of the detector. In addition, a test that directly applies heat or smoke takes time and pollutes the detector.Therefore, apply a test voltage to the circuit inside the fire detector and operate the detector to perform a simulated test. There are various test methods.

[0003]

When a fire alarm provided in a dwelling unit is inspected, the resident there may be absent. For example, if there is a manager of the dwelling unit, it is troublesome to request a witness and enter the dwelling unit.

Generally, even an inspector of a fire alarm does not like to put another person in the dwelling unit, so the inspection work cannot be performed quickly.

[0005]

In view of the above points, the present invention provides a fire alarm in which a fire receiver and a plurality of fire detectors connected to the fire receiver through signal lines are provided in a dwelling unit. A test circuit is provided for a plurality of fire detectors, and an input means provided outside the dwelling unit operates the test circuit by identifying one of the plurality of fire detectors through a signal line. Perform test input, and the notification means provided outside the dwelling unit
The alarm operation is performed based on the fire signal generated by the operation of the specified test circuit of the fire detector.

Then, by a test input of the input means provided outside the dwelling unit, a fire signal generated by the operation of the specified test circuit of the fire detector is sent to the fire receiver, and the notifying unit provided outside the dwelling unit is A notification operation is performed based on a fire signal via a fire receiver, and the notification means is a fire indicator light or an alarm, and the input means is a fire detector from outside the unit via a signal line. A signal sending circuit for sending a signal for specifying, or an input terminal for connecting a tester having a signal sending circuit, and the signal for specifying a fire detector is a different frequency signal or code signal. is there.

[0007]

[Function] A signal for specifying the sensor is sent from the signal sending circuit of the outdoor display device to the detector electric circuit of the fire receiver, and the adapter of the specified detector operates to generate a test voltage, which causes the fire detector to operate. To operate. Since the result is notified on the outdoor display, the inspector can perform a test input from outside the dwelling unit and can confirm the result outside.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram of a fire alarm system using the present invention. Fire receiver RE at dwelling unit H
The heat detectors DH and smoke detectors DS provided in each room are connected to the signal lines C and L, which are sensor electric circuits from the above, and the signal lines C and L are outside the dwelling unit H, for example, on the entrance. It is connected to the line confirmation switch SW of the provided outdoor display LX. Although not shown, an adapter AD that is connected to the sensor electric circuit similarly to the sensor is detachably attached to each sensor DH, DS in the sensor housing. A signal sending circuit TR is provided in the outdoor display unit LX and is connected to the signal lines C and L. In addition to the signal lines C and L, the display electric circuit X is wired from the fire receiver RE to the outdoor display LX, and the operation of the fire receiver RE turns on the fire indicator light DP as a notification means and an alarm device. BZ is sounded. Therefore, the electric path X is composed of a plurality of conducting wires including a power line, an acoustic line, and a display line.

The signal transmission circuit TR is connected to the signal lines C and L as shown in FIGS. 2 and 3, and is configured to transmit a signal of a frequency corresponding to the adapter AD of each sensor. That is, 8 is a relay connected to the transistor 9 and the standby switch 10. Reference numeral 11 is a rotary switch for frequency selection, and its movable contact is through a switch 12 for transmission. The fixed contacts are connected to the vibrating parts VB1 to VBn.

Each vibrating section VB has a tuning fork 14 as a vibrator.
, An analog switch 15 connected to the fixed contact of the rotary switch 11, and a light emitting diode 16 for displaying the transmission frequency.

The oscillating circuit 18, the transistor 19, the capacitor 20 and the like constitute a common oscillating portion of the vibrating portion VB, and are connected to the signal lines C and L via the make contacts 81 and 82 of the relay 8.

The terminal of the timer 24 is connected to the base electrode of the transistor 9 through the resistor 25, and reset input is performed by the break contact of the switch 12.

The photocoupler 26 is for detecting the operation of the sensor, and its output is connected to the base electrode of the transistor 29.

The transmission lamp 31 and the stop lamp 32 are connected to the power source by the switching contact 83 of the relay 8.

As a fire detector having a test terminal, a smoke detector DS is shown in FIG. 4 as an example. Smoke detector DS
Is controlled by the pulse generation circuit 34, and the light emitting element 33
Is a so-called scattered light type smoke sensor in which the light emitting drive circuit 35 performs pulse lighting and scattered light generated by smoke is received by the light receiving element 36.

The output of the light receiving element 36 is amplified by the amplifier circuit 37, and its predetermined output is detected by the threshold detection circuit 38.
The output of the threshold detection circuit 38 is input to the AND circuit 39 together with the output of the pulse generation circuit 34 in order to prevent malfunction, and the switching circuit 41 in the subsequent stage is operated only when the output synchronized by the redundant circuit 40 continues a plurality of times. I am trying to let you.

The test terminal T of the sensor is connected between the amplifying circuit 37 and the threshold detecting circuit 38, and is connected in parallel with the series circuit of the resistors 42 and 43 provided between the output of the amplifying circuit 37 and the terminal C and the resistor 43. A test circuit is configured with the formed capacitor 44, and when a predetermined voltage is applied to the terminal T, the threshold detection circuit 38 operates. Reference numeral 45 is a depolarizing circuit using a diode bridge, and 46 is a constant voltage circuit including a transistor and a zener diode, which are connected to the signal lines C and L.

As shown in FIG. 5, the adapter AD comprises a tuning fork 47 that is tuned to a specific frequency, a tuning circuit 48, a switching circuit 51 including transistors 49 and 50, and a test terminal T. The low output of the tuning circuit 48 causes the switching circuit 51 to operate, and a constant voltage is applied to the output terminal of the test terminal T. The adapter AD is also provided with a depolarizing circuit 52 and a constant voltage circuit 53 similar to the sensor.

The test operation of the fire alarm according to the present invention will be described below. In order to perform remote inspection in this embodiment, an adapter AD attached to each sensor DH, DS
The test voltage is set to be generated when signals of different frequencies are received.

For the outdoor display LX installed outside the dwelling unit H, an inspector from outside the switch 1 of the signal transmission circuit TR
When 0 is closed, the transistor 9 becomes conductive and the relay 8 operates, and its contacts 81 and 82 are closed to enter the standby state. Then, when the switch 12 is closed, the timer 24
The reset terminal becomes high level, the timer 24 starts, and the analog switch 15 closes.

Then, the tuning fork 14 is connected to the oscillating circuit 18, and a signal of a specific frequency determined by the tuning fork 14 is applied to the contact 81,
A signal is transmitted between the signal lines C and L, which is a sensor circuit, via 82. Among the plurality of adapters connected in parallel, the adapter of the sensor having the tuning fork 47 that resonates with this signal operates.

That is, the tuning fork 47 resonates, the tuning circuit 48 operates, and the switching circuit 51 operates, and the test voltage is applied to the resistor 43 of the smoke sensor DS via the test terminal T. At this time, if the sensor is normal, the threshold detection circuit 38 operates, and the AND circuit 39 and the redundant circuit 40.
The switching circuit 41 operates through and sends a fire signal to the fire receiver RE.

Although not illustrated in the fire receiver RE,
Ring the fire bell and turn on the fire lamp, and use the power line X for the indicator.
The fire indicator light DP is turned on and the alarm BZ is sounded via, and the operation of the detector can be confirmed even by an inspector outdoors.

As is clear from the above operation, the inspector
The result of the test that specified the sensor from the outside can be confirmed outdoors and there is no need to enter the house.

On the other hand, in the signal transmission circuit TR, the photocoupler 26 detects that the fire detector DS has operated and is turned off. This turns off the transistor 29, stops the timer 24, stops the operation of the transistor 9 and the relay 8, and turns on the stop lamp 32. Then, when the switch 12 is opened, the timer 24 is reset.

When the output of the signal transmission circuit TR is stopped, the application of the test voltage to the smoke detector DS is stopped, and the smoke detector DS self-recovers. Here, a general smoke detector uses a so-called self-holding type that has a self-holding circuit, continues switching when a fire operates, and does not recover unless there is a recovery operation of the receiver. However, in the present invention, a self-recovery type is suitable. If not, it is possible to use a lever or a self-holding type in which an adapter is also provided on the side of the fire receiver RE so that a recovery input can be performed from the outdoor display LX to the receiver.

When the operated smoke detector DS is restored, the transistor 29 of the signal transmission circuit TR is turned on, and the standby state is resumed as described above. Rotary switch 1
Move one moving contact to the next fixed contact and test the next sensor. Similarly, the tests are sequentially performed for the number of connected sensors.

During the test, if there is a broken sensor, it does not operate even if a test voltage is applied to the test terminal T.
Since the fire receiver RE and the outdoor display LX do not operate, it can be recognized that the sensor is defective.

In the above-mentioned embodiment, the adapter AD is detachably attached to the sensor housing, but it may be integrally provided in the sensor circuit, and the test method is to turn on the test LED. Other techniques may be used. Also, various techniques can be used in the ionization type smoke sensor and the heat sensor.

The outdoor display LX operates the alarm BZ and the indicator lamp DP by the signal from the fire receiver RE by the electric line X for the display, but the code signal is shared between the signal lines C and L. The alarm device BZ may stop ringing during the test. As for the method of identifying the sensor of the signal transmission circuit TR, the adapter AD may be operated by another method such as using a code signal.

Alternatively, the outdoor display LX may be provided with only a connection terminal, and an inspector may bring in a tester having the same structure as the signal transmission circuit TR to connect and test it.

Further, the fire receiver RE does not necessarily have to be a receiver as in the case of a high-rise condominium, and may be a repeater for detecting the operation of a sensor connected to the sensor circuit. Therefore, a building integrated monitoring board or the like may be connected to the primary side of the fire receiver RE.

[0033]

As described above, according to the present invention,
A fire alarm provided with a fire receiver and a plurality of fire detectors connected to the fire receiver via signal lines,
A test circuit is provided for the plurality of fire detectors, and the input means provided outside the dwelling unit specifies one of the plurality of fire detectors through the signal line to perform a test input for operating the test circuit. A notification means provided outside the dwelling unit performs a notification operation based on the fire signal generated by the operation of the specified test circuit of the fire detector. Therefore, a signal specifying the detector is sent from the signal sending circuit, which is the input means of the outdoor display, to the detector circuit of the fire receiver. Then, since the test circuit of the specified sensor operates and the result is notified to the notification means of the outdoor display, the test input can be performed from outside the dwelling unit, and the result can be confirmed outside. There is.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a system utilizing the present invention.

FIG. 2 is an electric circuit diagram showing a signal transmission circuit utilizing the present invention together with FIG.

FIG. 3 is an electric circuit diagram showing, together with FIG. 2, a signal transmission circuit utilizing the present invention.

FIG. 4 is an electrical circuit diagram showing a smoke detector utilizing the present invention.

FIG. 5 is an electric circuit diagram showing an adapter using the present invention.

[Explanation of symbols]

AD adapter DS smoke detector (fire detector) LX outdoor display TR signal transmission circuit (input means) C, L sensor circuit

Claims (5)

(57) [Claims] 1. A fire alarm provided in a dwelling unit with a fire receiver and a plurality of fire detectors connected to the fire receiver via signal lines, wherein the plurality of fire detectors include: A test circuit is provided, and an input means provided outside the dwelling unit performs a test input for operating the test circuit by specifying one of the plurality of fire detectors through the signal line, and is provided outside the dwelling unit. A fire alarm device characterized in that the alarm means performs an alarm operation based on a fire signal generated by the operation of the test circuit of the specified fire detector. 2. The fire signal generated by the operation of the test circuit of the specified fire detector is sent to the fire receiver by the test input of the input means provided outside the dwelling unit, and the notification means provided outside the dwelling unit is The fire alarm device according to claim 1, wherein an alarm operation is performed based on the fire signal via the fire receiver. 3. The fire alarm according to claim 1, wherein the alarm means is a fire indicator light or an alarm. 4. The input means is an input terminal for connecting a signal sending circuit for sending a signal for specifying a fire detector from outside the house through a signal line, or a tester having the signal sending circuit. The fire alarm according to claim 1. 5. The fire alarm according to claim 4, wherein the signals specifying the fire detectors are different frequency signals or code signals.