JP2003132455A - Fire alarm for housing with signal transmission input - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new fire alarm for a housing capable of outputting a transmission alarm at the time of receiving a signal transmission input from the other security sensor. SOLUTION: This fire alarm for a housing is provided with a fire detecting circuit 3 for detecting smoke or rising of a temperature, and for outputting an alarm signal, an alarm circuit 7 for outputting an alarm, and a signal processing circuit 4 for controlling the alarm circuit 7 based on the alarm signal. This signal processing circuit 4 which is provided with a signal transmission input terminal T operates the alarm circuit 7 at the time of detecting a signal transmission from an outside security sensor inputted from the signal transmission input terminal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire alarm device for a house having a novel structure, which receives a transfer input from a security sensor separately installed in a house and outputs an alarm.

[0002]

2. Description of the Related Art FIG. 6 is a circuit block diagram showing a conventional fire alarm for a house.

This fire alarm device 100 includes a power supply circuit 10
It is configured to include a one- and three-minute timer circuit 102, a smoke detection circuit 103, a signal processing circuit 104, a relay circuit 105 for performing relay output, an energization indicator lamp circuit 106, and an alarm circuit 107. The signal processing circuit 104 controls the energization indicator lamp circuit 106, the alarm circuit 107, and the interlocking circuit 105 based on the smoke detection signal from the smoke detection circuit 103.

[0004]

By the way, in such a conventional residential fire alarm, when a fire is detected, an alarm buzzer is output to notify the occupants, but it does not respond to an external security sensor such as crime prevention equipment. It does not have a function to output an alarm. That is, the fire alarm device does not have a function of receiving a transfer input and outputting another crime prevention alarm.

The present invention has been made in view of the above circumstances, and a fire alarm for a house is designed so that the alarm device itself can receive a transfer input from another alarm device and output a transfer alarm. The purpose is to provide.

[0006]

In order to achieve the above object, a residential fire alarm device according to claim 1 is a fire detection circuit for detecting smoke or temperature rise and outputting a warning signal, and an alarm. In a fire alarm for a house, which comprises an alarm circuit for outputting and a signal processing circuit for controlling the alarm circuit based on an alarm signal, a signal input terminal is provided, and the signal processing circuit is provided from the signal input terminal. The alarm circuit is operated when an input transfer signal from an external security sensor is detected.

Since the transfer input terminal is provided to receive the transfer input, the residence resident is informed of the abnormality detected by the external alarm device or the crime prevention sensor by the alarm buzzer or the like in addition to the fire alarm. be able to.

According to a second aspect of the present invention, the signal processing circuit according to the first aspect further includes a disconnection detection circuit that detects a disconnection between the transfer input terminals and outputs a disconnection detection signal.

Therefore, the fire alarm can output a transfer alarm, and even when the external alarm is disconnected, it can be accurately judged and the disconnection alarm can be output.

According to a third aspect of the present invention, the residential fire alarm device according to the first or second aspect further comprises an interlocking circuit having a relay contact, and the signal processing circuit interlocks when a transfer signal input is detected. It is characterized by operating a circuit.

In the residential fire alarm according to claim 4,
In Claim 1, the security sensor is a crime prevention sensor.

In the residential fire alarm according to claim 5,
The transfer detection circuit according to any one of claims 1 to 3 is provided with a photocoupler for detecting a transfer signal.

In the residential fire alarm according to claim 6,
The signal processing circuit according to any one of claims 1 to 3, wherein the signal processing circuit includes a photocoupler for detecting the transfer signal.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a circuit block diagram showing an example of the essential structure of a fire alarm for a house according to the present invention.

In the figure, 1 is a power supply circuit which converts a power supply input into a constant voltage and supplies power to a circuit in a subsequent stage, and 2 is an alarm for 3 minutes when an alarm stop switch (not shown) is pressed when an alarm device gives a false alarm. 3 minute timer circuit to stop, 3 is a fire detection circuit that detects a fire by detecting smoke or temperature rise of the surrounding environment, and outputs a warning signal, 4 is an output of the fire detection circuit 3, 3 minute timer circuit 2 A signal processing circuit for controlling an energization indicator lamp (not shown), an alarm circuit, and an interlocking circuit based on a signal, 5 is an interlocking circuit for relaying a smoke detection signal, and 6 is energization for turning on or blinking the energization indicator light An indicator circuit, 7 is an alarm circuit that sounds an alarm buzzer (not shown), and T is a transfer input terminal.

Here, the fire detection circuit 3 includes a constant temperature sensing type that senses that the ambient temperature has exceeded a certain temperature, a differential sensing type that senses a sudden temperature change, and the like. The alarm circuit 7 includes a ringing sound generation circuit that makes alarm sounds different depending on whether a fire is detected or a transfer signal.

FIG. 2 is a circuit diagram for explaining the operation of the interlocking circuit 5. When receiving the fire detection signal from the signal processing circuit 4, the interlocking circuit 5 outputs a Hi level signal from the output port of the microcomputer, the transistor Tr is turned on, and the mechanical relay is operated to output no voltage to the outside. Output contact. For example, a buzzer other than the above-mentioned alarm buzzer is caused to ring by a non-voltage contact output.

According to the present invention, the residential fire alarm S has a basic function such as an alarm output based on a fire detection signal and the above-mentioned relay output, and the signal processing circuit 4 includes a security sensor such as an external security sensor. By receiving the transfer signal input via the transfer input terminal T, the transfer detection signal (see FIG.
The output signal indicated by the symbol A) is transmitted to operate the alarm circuit 7 and the interlocking circuit 5. The alarm circuit 7 and the interlocking circuit 5 that have received the transfer detection signal sound an alarm sound different from the smoke detection to notify the occupant of the crime prevention abnormality.

By thus receiving the transfer input from the external security sensor, the fire alarm can be operated as an alarm receiver of the security sensor, and the fire / security system can be operated easily and inexpensively. You can

FIG. 3 is a diagram showing an example of the circuit configuration of the transfer detection circuit included in the signal processing circuit 4.

Another security sensor, for example, a glass breakage detector G in this case, is connected to the transfer input terminal T of the residential fire alarm S. The security sensor is not limited to such a crime prevention sensor, and may be a human body detection sensor or the like that detects an occupant from outside.

When the glass breakage detector G detects the breakage of the window glass or the like, the thyristor S is activated by the glass breakage detection input.
c is turned on, and a detection signal is output to the residential fire alarm S.

The signal processing circuit 4 (transition detection circuit 4a) of the residential fire alarm S includes a comparison circuit IC1. One of the transmission input terminals T is connected to the non-inverting input terminal of the comparison circuit IC1. , Two resistors R2 connected in series to ground,
The transfer input terminal T is connected to the inverting input terminal, and the resistor R1 is grounded to the point A.

Here, the potential at the point A when the glass breakage detector G is in a steady state is such that point B> point A due to the relationship between the resistors R1 to R3 and the resistance R5 on the glass breakage detector G side. Is set to.

Therefore, according to such a comparison circuit, a Hi level signal is output from the comparison circuit IC1 in the steady state, whereas when the glass breakage detector G detects the glass breakage, The thyristor Sc is turned on, the potential at the point A is raised to the internal power supply voltage Vcc, and the potential relationship between the points A and B is point A> point B. Therefore, a low-level signal is output from the comparison circuit IC1 to the alarm circuit 7. Is output to the interlocking circuit 5.

Based on this Low signal, the alarm circuit 7 sounds the buzzer with an alarm sound different from that for fire detection, thereby informing the resident of the house that there is a transfer input, and the relay from the interlocking circuit 5 Other alarms can be output as well.

FIG. 4 is a diagram showing another example of the circuit configuration of the transfer detection circuit having a disconnection detection function.

The transfer detection circuit 4b includes first and second comparison circuits IC2 and IC3, and the first comparison circuit I
The non-inverting input terminal of C2 is connected to one of the transfer input terminals T via a connection point (point B) of the resistors R2 and R3, and the inverting input terminal of the second comparison circuit IC3 is connected to the resistors R2 and R3. Is connected to one of the transfer input terminals T via a connection point (point C) with the resistor R4 additionally connected in series. Also, the first
Input terminal of the second comparison circuit IC2 and the second comparison circuit IC
3 to the non-inverting input terminal, transfer input terminal T via point A
And the resistor R1 is grounded to the point A.

Here, the potential at the point A when the glass breakage detector G is in the steady state is the potential at the point B> from the relation of the resistors R1 to R5.
It is set so that point A and point C <point A.

Therefore, in such a circuit, in the steady state, the first comparison circuit IC2 and the second comparison circuit IC3 are
Outputs a Hi level signal. On the other hand, when the glass breakage detector G detects glass breakage, the thyristor Sc is turned on and the potential at the point A is the internal power supply voltage Vcc.
The relationship between the potentials at points A and B is raised to point A> point B
Therefore, a low level signal is output from the first comparison circuit IC2 to the alarm circuit 7 and the interlocking circuit 5. Since the potentials at points A and C have a relationship of point C <point A at both the constant time and the transfer input, the second comparison circuit IC3 outputs H
An i level signal is output.

If there is a disconnection between the transfer input terminals,
The potential of the point A becomes the ground potential, and the relation of the potentials of the points A and C is point C> point A.
A w level signal is output.

Therefore, in the transfer detection circuit 4b,
The relationship between the output signals of the first and second comparison circuits IC2 and IC3 is Hi-Hi during steady state, Low-Hi during transfer input, and
Since Hi-Low occurs when the wire breaks, both the transfer input and the wire break can be detected, and a wire break alarm can be output in addition to the wire transfer warning.

FIG. 5 is a diagram showing a circuit configuration of still another transfer detection circuit.

The transfer detection circuit 4c includes a photocoupler P instead of the comparison circuit. When current is supplied to the photocoupler P, the phototransistor turns on,
The configuration is such that the input port of the CPU is Low.

In such a configuration, in a steady state, the thyristor Sc of the glass breakage detector is in an off state, so that power is not supplied to the photocoupler P, so that the input port of the CPU becomes Hi. On the other hand, at the time of transfer input, the thyristor Sc turns on, the photocoupler P becomes conductive, and the input port of the CPU becomes Low.

When the input port is Low, the CPU
An ON signal is sent from the output port to the alarm circuit 7, etc., and the alarm buzzer sounds.

[0038]

As can be understood from the above description, the residential fire alarm of the present invention is provided with a transfer input terminal so as to receive the transfer input. In addition to the fire alarm, an abnormality detected by an external security sensor can be notified by an alarm buzzer or an energization indicator lamp that emits an alarm sound different from that when a fire is detected. Therefore, it is possible to easily and inexpensively construct a system that can be used for both fire protection and crime prevention by using the fire alarm for a house without the need to separately provide a fire protection system.

In particular, the residential fire alarm device according to the second aspect of the present invention has a structure capable of detecting a disconnection between the transfer input terminals, so that a disconnection alarm can be output in addition to the transfer alarm.

In the third aspect, the interlocking circuit is operated based on the transfer signal, so that the resident can be informed by operating an externally connected device such as a buzzer.

According to the fourth aspect, since the transfer signal from the crime prevention sensor is accepted, the fire alarm can be operated as a receiver of the crime prevention sensor.

In the fifth or sixth aspect of the present invention, since the transfer input is detected by the comparison circuit or the photocoupler, it can be used as the receiver of the security sensor only by adding a simple structure to the fire alarm for the house. be able to. It can also be manufactured at low cost.

[Brief description of drawings]

FIG. 1 is a circuit block diagram showing an example of a main configuration of a residential fire alarm device of the present invention.

FIG. 2 is a circuit diagram illustrating the operation of the interlocking circuit.

FIG. 3 is a diagram showing an example of a circuit configuration of a transfer detection circuit.

FIG. 4 is a diagram showing another example of the circuit configuration of the transfer detection circuit.

FIG. 5 is a diagram showing another example of the circuit configuration of the transfer detection circuit.

FIG. 6 is a circuit block diagram showing a main part configuration of a conventional home fire alarm device.

[Explanation of symbols]

Fire alarm for house 3 Fire detection circuit 4 Signal processing circuit 4a, 4b, 4c Transfer detection circuit IC1, IC2, IC3 comparison circuit P photo coupler 5 interlocking circuit 7 Alarm circuit T Transfer input terminal

Continued front page    (72) Inventor Tomohiro Yoshizuru             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works             Within the corporation F-term (reference) 5G405 AA07 AB01 AB02 AC01 BA01                       CA26 DA21 EA27 EA31

Claims (6)

[Claims] 1. A fire detection circuit for detecting a smoke or temperature rise and outputting a warning signal, a warning circuit for outputting a warning, and a signal processing circuit for controlling the warning circuit based on the warning signal. In addition, the residential fire alarm has a transfer input terminal, and the signal processing circuit operates the alarm circuit when it detects a transfer signal from an external security sensor input from this transfer input terminal. The fire alarm for the house that I am trying to make. 2. The housing according to claim 1, wherein the signal processing circuit further includes a disconnection detection circuit that detects a disconnection between the transfer input terminals and outputs a disconnection detection signal. Fire alarm. 3. The fire alarm device for a house according to claim 1, further comprising an interlocking circuit having a relay contact, wherein the signal processing circuit detects an input of the transfer signal. A fire alarm for a house, characterized by operating the interlocking circuit. 4. The fire alarm for a house according to claim 1, wherein the security sensor is a crime prevention sensor. 5. The fire alarm for a house according to claim 1, wherein the signal processing circuit includes a comparison circuit for detecting the transfer signal. 6. The fire alarm for a house according to claim 1, wherein the signal processing circuit includes a photocoupler for detecting the transfer signal.