JP2002269658A - Alarm device and alarm system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an alarm device and an alarm system each having a fire alarm function, allowing easy installing work. SOLUTION: This alarm device has a gas detection means 1; a signal delay means 2 connected to the gas detection means 1, imparting a delay effect to a signal detected by the gas detection means 1; a fire detection means 3; and an output terminal 4 outputting a signal detected by the fire detection means 3 and a signal delayed by the signal delay means 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a C space inside a living space.
The present invention relates to an alarm device and an alarm system that detect and report leakage of O gas, combustion gas, or the like, or occurrence of fire.

[0002]

2. Description of the Related Art As a conventional alarm device and alarm system, for example, a gas leak alarm is installed inside a living space,
Some alarm devices output an alarm signal to a gas meter (hereinafter, referred to as a microcomputer meter) having a signal input terminal installed outdoors. In this case, the gas leak alarm signal is notified to the microcomputer meter installed outdoors, and the gas leak alarm signal is notified to the microcomputer meter via signal delay means having a delay function. The signal delay means for suppressing the operation due to the transient gas detection signal does not immediately determine that the abnormality detected by the alarm device is abnormal, but during a predetermined waiting time set as a delay time. And monitor the abnormalities that have occurred. Then, when an abnormality is detected when the waiting time has elapsed, a gas leak alarm signal is output to the microcomputer meter. The microcomputer meter receives the gas leak alarm signal and performs a predetermined operation such as, for example, operating a shut-off valve built in the microcomputer meter. As a result, the gas supply path is shut off to stop the gas supply, thereby preventing an accident such as fire or explosion from occurring.

[0003]

In recent years, in order to improve the disaster prevention effect, it is desired to add not only a gas leak notification mechanism to a gas alarm device but also a function of notifying that a fire has actually occurred. The demand that has increased. FIG. 3 shows such a gas alarm device with a fire alarm function (hereinafter, referred to as an alarm device with a fire alarm) connected to the microcomputer meter. here,
The line related to the fire alarm signal is indicated by a dotted line. For example, when a fire detection signal such as a heat detection signal is transmitted, it is notified that a fire has already occurred, so the detection signal is output directly to the microcomputer meter without delay processing. There is a need to. Therefore, when the fire alarm system is installed in an arbitrary room of the user's residence, a separate line dedicated to the fire detection signal is newly laid in parallel with the existing gas leak alarm signal line, and this fire alarm signal Line must be connected to the gas leak alarm signal line between the microcomputer meter and the signal delay means. Such wiring is performed by using the route of the gas leak alarm signal line that has already been laid, or by constructing a new insertion portion on the wall surface of the user's residence. However, it is not always easy to use the same route as the existing line,
Even when the insertion section is constructed, it is often difficult for the user's residence to construct such an insertion section.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an alarm device and an alarm system having a fire alarm function that can be easily installed in view of the above-mentioned drawbacks.

[0005]

According to a first aspect of the present invention, there is provided an alarm device according to a first aspect of the present invention. A signal delay unit connected to provide a delay effect to a signal detected by the gas detection unit; and a fire detection unit, and an output for outputting a signal detected by the fire detection unit and a signal delayed by the signal delay unit. A terminal is provided on the alarm device main body. With the above-described configuration, the gas detection means and the output terminal can be connected via the signal delay means inside the alarm device with fire alarm, while the fire detection means outputs the signal without the signal delay means. Can be directly connected to the terminal. Therefore, only one output terminal needs to be provided in the alarm device with fire alarm.
As a result, for example, when the fire alarm device and the microcomputer meter are connected to each other, only one wire is required, so that installation work and wiring work in the user's residence can be simplified. . In addition, even when replacing the gas alarm device with a fire alarm device, it is possible to continue using the conventional wiring in the current state, and in this case also simplify installation work. Can be.

A feature of the alarm system according to the present invention is that the alarm device and the gas supply path shutoff means are connected to each other. With the above-mentioned feature configuration, similarly to the effect according to claim 1, while arranging and wiring work in the user's residence is simplified, the alarm device with fire alarm and the gas supply path shut-off means are connected. Alarm system can be installed. Of course, it is easy to replace the conventional gas alarm device with a fire alarm device.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

An alarm device and an alarm system according to the present invention, as shown in FIG. 1, for example, include a gas detecting means inside an alarm device main body and a signal connected to the gas detecting means and detected by the gas detecting means. The alarm device body includes a signal delay unit that gives a delay effect, and a fire detection unit, and an output terminal that outputs a signal detected by the fire detection unit and a signal delayed by the signal delay unit. . In particular, when configuring an alarm system, in addition to such an alarm device K with a fire report, a gas supply path shutoff means connected to the output terminal 4 of the alarm device K with a fire report is further added.

The fire alarm device K is installed on an arbitrary room in a user's residence, for example, on a wall surface of a kitchen where gas appliances are installed and which is used daily. Examples of the gas appliance include a gas stove and a water heater. Gases to be detected by the alarm device with fire alarm K are CH ₄ gas and CO gas, but gas types such as fuel gas components can be used as gas types.

In the present embodiment, the gas supply path shutoff means comprises, for example, a microcomputer meter M and a shutoff valve 7 for shutting off gas in an emergency.

The microcomputer meter M is installed on the outer wall surface of the house near the room where the fire alarm device K and the gas equipment are provided, and has a function of measuring city gas mainly consumed in the user's home. . The microcomputer meter M is connected to the fire alarming device K via a fire alarm signal / gas leak alarm signal line L. The fire alarm signal / gas leak alarm signal line L is laid using, for example, an insertion portion formed through a wall surface of a house or the like. A gas supply pipe 6 for supplying city gas is connected to these gas appliances. The shutoff valve 7 is provided in the gas supply pipe 6.

When a fire accident or the like occurs, a signal from the alarm device with fire alarm K is input to the microcomputer meter M via the fire alarm signal / gas leak alarm signal line L, and the shut-off valve 7 is turned on. When activated, the gas supply to the gas equipment is shut off.

When a fire or gas leak occurs,
A no-voltage signal of about 0 V is output from the fire alarm device K to the fire alarm signal / gas leak alarm signal line L. That is, the shut-off valve 7 is provided with a mechanism for switching the circuit between open and closed based on an input signal, and the circuit is placed in an open state in a normal state. Switched to the closed state.

When the conventional gas alarm device is replaced with the alarm device with fire alarm of the present invention, the installation of the fire alarm signal / gas leak alarm signal line L is extremely simple. For example, a gas leak alarm signal line connected to a conventional gas alarm device as shown in FIG. 3 can be used as the fire alarm signal / gas leak alarm signal line L.

Next, the configuration of the fire alarm device K will be described with reference to FIG.

As shown in FIG. 2, the alarm device K with fire alarm includes a gas detecting means 1, a signal delaying means 2, a fire detecting means 3, an output terminal 4, and an alarm output section 5. Here, as the fire detecting means 3, an example in which a temperature sensor for detecting heat is used is shown, but various other sensors for detecting smoke can be used. The gas leak alarm signal from the gas detecting means 1 and the fire alarm signal from the fire detecting means 3 merge at the alarm output section 5, and the output terminal 4 and the fire alarm signal / gas leak alarm signal line L1 As described above, it is possible to output as a no-voltage signal as a fire alarm signal / gas leak alarm signal to an external device, for example, the microcomputer meter M via only the book.

The gas detection means 1 comprises a detection circuit and a detection signal processing section. The detection circuit, for example,
A flammable gas detecting element made of a tin oxide semiconductor responsive to a flammable gas such as a hydrocarbon, and a temperature compensating element are assembled in a bridge form together with two predetermined resistors. When the gas detecting element comes into contact with the combustible gas, its resistance value changes. Then, by applying a predetermined voltage between a pair of terminals of the bridge circuit and obtaining a voltage output between the other pair of terminals, the gas concentration can be detected.

The detection signal processing unit has a threshold for outputting a gas leak alarm signal,
A correction formula for correcting the threshold value according to the ambient temperature is provided. This correction is performed based on the temperature output obtained by the temperature compensation element. These values are obtained on a voltage value basis. The value obtained after the correction of the atmospheric temperature obtained as described above is compared with the threshold value, and when the corrected value exceeds the threshold value, the gas detection unit 1 outputs the gas leak alarm signal Output to the signal delay means 2.

The signal delay means 2 performs the following delay processing on the signal from the gas generation procedure in accordance with the alarm delay time setting procedure. That is, the signal from the gas detecting means is sequentially monitored, and when the output increment is large as seen with time, a gas leak alarm is output promptly. On the other hand, if the output increment is small, a gas leak alarm is output to the alarm output unit 5 after a certain delay time, for example, 40 to 50 seconds has elapsed.

The fire detecting means 3 comprises a temperature sensor unit having a temperature sensor and a detection signal processing unit for processing a notification signal from the temperature sensor unit. For example, a thermistor is used as the temperature sensor. The thermistor detects a temperature change by a change in its own resistance value corresponding to the temperature change, and determines that a fire has occurred when the detected value exceeds a predetermined threshold value.

In the detection signal processing section, a voltage output sent from the temperature sensor is constantly monitored. When this output exceeds a predetermined output, a fire alarm signal is output to the alarm output unit 5.

The alarm output section 5 comprises output processing means for performing alarm output processing in accordance with the input fire alarm signal and gas leak alarm signal, and automatic notification processing means.

When one or both of the gas leak alarm signal and the fire alarm signal are input to the output processing means, it is determined that a gas leak or a fire has occurred, an audio alarm is issued via a speaker, and the LED is turned on. indicate. At the same time, a gas leak alarm signal and a fire alarm signal are output to the automatic notification processing means for transmission to external means.

That is, the automatic notification processing means uses the output terminal 4 and the fire alarm signal / gas leak alarm signal in order to cut off the gas supply to the gas equipment by triggering an alarm at the output processing means. A fire alarm / gas leak alarm signal is output to the microcomputer meter M via the service line L. Then, it functions so as to shut off the gas supply by indirectly operating the shutoff valve 7 provided in the microcomputer meter M.

As shown in FIG. 2, the automatic notification processing means may optionally be provided with a structure capable of outputting other non-voltage signals and voltage signals. For example, the voltage signal is 6 V in an alarm monitoring state, 12 V in a gas leak alarm, and 1 V in an incomplete combustion alarm.
A rectified and smoothed DC voltage of 8 V can be output. With the above-described configuration, the fire alarming device K can use the fire alarm signal / gas leak alarm signal line L in advance to register fire extinguishers, security guard companies, city gas supply companies, fire stations, and the like. It is possible to output a signal to the notified report destination and make a report.

[Another Embodiment] In the above embodiment, an example was shown in which a thermistor having a relatively wide detection range was used as the temperature sensor, but the temperature sensor reacts in response to temperature. If so, any means can be used. For example, any means such as a resistance measuring body and a thermocouple other than the thermistor may be used. Further, what is called a temperature fuse that breaks when a predetermined temperature exceeds the ambient temperature can also be used. In this case, it is necessary to configure the fire alarm device K so as to issue a fire alarm signal in accordance with the disconnection.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of an alarm device of the present invention.

FIG. 2 is a block diagram of an alarm device with a fire alarm according to the present invention.

FIG. 3 is a schematic diagram of a conventional alarm device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gas detection means 2 Signal delay means 3 Fire detection means 4 Output terminal

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G08B 21/00 G08B 21/00 // G01N 27/00 G01N 27/00 K (72) Inventor Takeshi Hashimoto Osaka Inside Osaka Gas Co., Ltd. 4-1-2 Hirano-cho, Chuo-ku, Osaka-shi (72) Inventor Takashi Abe Inside Osaka Gas Co., Ltd. 4-1-2 Hirano-cho, Chuo-ku, Osaka-shi, Osaka (72) Inventor Tateishi Yuko F-term in Shin-Cosmos Electric Co., Ltd. 2-5-4 Mitsuyanaka, Yodogawa-ku, Osaka-shi, Osaka 2G046 AA02 AA11 AA18 AA19 BJ02 CA09 DC07 DC12 DC14 DC16 DC17 DC18 FB02 FE39 2G060 AA02 AB08 AE11 AE19 HD03 5C085 AA01 AA06 AB01 AB09 BA12 BA15 CA04 DA16 DA17 EA31 5C086 AA01 AA02 BA01 BA11 CA01 CB01 CB11 DA07 EA13 FA02 5G405 AA01 AB01 AB02 AB03 AC07 CA27 CA52 CA55 CA60

Claims (2)

[Claims] 1. A gas detecting means inside an alarm device main body,
A signal delay unit connected to the gas detection unit for giving a delay effect to the signal detected by the gas detection unit; and a fire detection unit, and the signal detected by the fire detection unit and the signal delayed by the signal delay unit. An alarm device comprising an output terminal for outputting a signal and the alarm device main body. 2. An alarm system configured by connecting the alarm device according to claim 1 and a gas supply path shutoff means.