JP2001337701A - Gas-blast circuit breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas-blast circuit breaker which detects that an erroneous of gas leak alarm sort is jointed with a gas-blast circuit breaker. SOLUTION: The sort of a gas-leak-alarm 2 is decided with based on a driving alarm outputted from an alarm connection detection intermittent driving mean 19 and an alarm signal intermittent driving mean. When this is different from that primarily connected, gas is shut off or it is informed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas shut-off device which is used in succession with an alarm which detects a gas leak and issues an alarm.

[0002]

2. Description of the Related Art As an alarm device connected to a conventional gas shut-off device of this type, there is, for example, an alarm device as disclosed in Japanese Patent Application Laid-Open No. Hei 6-111161, which has the structure shown in FIG.

In FIG. 3, a gas meter 1 and a gas leak alarm 2 are connected via two signal lines 3. The gas leak alarm 2 includes a gas detector 4 that detects gas leaks,
It comprises an alarm controller 5 for controlling the whole, an alarm 6 for issuing a gas leak alarm, and an input / output unit 7. The input / output unit 7 includes a photocoupler 8 that is turned on when a gas leak is detected, and a diode 9 connected to a phototransistor 8a of the photocoupler 8 so as to form a current path through which a current flows in a direction opposite to that when the gas leak is detected. It is composed of
The gas meter 1 includes a measuring unit 10 for measuring gas, a gas meter control unit 11 for controlling the whole, a shutoff valve 12,
The determination unit 13 determines the presence or absence of gas leakage and the presence or absence of connection.

Next, the operation of the configuration of the above conventional example will be described.
When the gas leak alarm 2 does not detect a gas leak, the photocoupler 8 is off, that is, since the phototransistor 8a of the photocoupler 8 is off, a current path in the a direction does not occur. The determination unit 13 of the gas meter 1 determines that there is no gas leakage. The determination unit 13 also periodically determines whether or not a current path in the direction b via the diode 9 occurs when there is no gas leakage. If there is no current path in the direction b, it is determined that the gas leak alarm 2 is not connected, and the shutoff valve 12 is closed.

On the other hand, the gas leak alarm 2 does not have an interface circuit connected to the gas meter 1 by the phototransistor 8 described above, and outputs different voltages when detecting a gas leak and when detecting a non-gas leak. FIG. 4 shows an example. In FIG. 4, 15 is a gas leak alarm,
It is installed at a predetermined position in the room. Reference numeral 14 denotes a gas circuit breaker, which is incorporated in a gas meter. Reference numeral 12 denotes a gas shut-off valve which is installed in a gas meter. This system is a gas leak alarm 2
When the gas leaks, a gas shut-off valve 12 incorporated in the gas meter is closed after a certain period of time has passed since the gas leak was detected. That is, the gas circuit breaker 14 is connected between two terminals connected to the gas leak alarm 2, and the voltage between the terminals is usually a first voltage level when the gas leak alarm 2 does not detect a gas leak, for example, About 6V, but gas leak alarm 2
Detects a gas leak, the voltage between the terminals becomes a predetermined second voltage level, for example, 12 V, becomes a voltage level at which the gas shutoff valve 12 can be driven, and closes the gas shutoff valve 12.

[0006]

In the above-mentioned conventional configuration,
A gas leak alarm 2 connected to the gas meter 1 transmits and receives a gas leak signal via the photocoupler 8 to the gas meter 1.
There is a case where the gas leak alarm device 2 that outputs a voltage at the time of gas leak by mistake in the market is connected. If the gas leak alarm 2 of the voltage output type is connected by mistake, the photocoupler 8 is normally turned on when a gas leak occurs, but the gas leak can be detected only by applying the voltage. However, since a higher voltage than that originally used in the gas meter 1 is applied, a part that is always on in the peripheral circuit units such as the control unit 11 and the determination unit 13 on the gas meter 1 side is generated, and is a power source of the gas meter 1. There has been a problem that battery consumption becomes remarkable, the battery voltage drops in a period shorter than a predetermined period in which safety monitoring should be performed, and safety monitoring cannot be performed.

The present invention has been made to solve the above-mentioned problem, and a case where a gas leak alarm device which outputs a voltage output as a gas leak signal other than a gas leak alarm device originally connected to a gas shutoff device is connected. It is an object of the present invention to provide a gas shut-off device capable of detecting this.

[0008]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention relates to an alarm signal intermittent drive means for outputting a drive signal for detecting whether a gas leak alarm is connected or not. The alarm signal connection input means for inputting the alarm signal connection signal at the time of driving signal output from the intermittent drive means determines the gas leak alarm device connection, and the drive signal determination means determines the alarm signal intermittent drive means and the alarm signal connection detection intermittent drive means. When the output signal is not determined, the alarm device connection detection signal is confirmed from the output signal from the alarm device connection input means, that is, the presence or absence of different types of alarm device connection is determined by the alarm device connection determination means, and the alarm device connection determination means is used. When it is determined that a different kind of alarm device is connected, the medium flow path is cut off by a cut-off means.

[0009] With this, it is possible to quickly determine whether the gas appliance can be used again or the gas leakage state by interrupting the flow path when the abnormal use is detected by the gas shut-off device. It is possible to accurately determine whether there is no plumbing or the gas appliance has returned to the normal setting state, and to monitor the usage state. Can be prevented.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to achieve the above object, a first embodiment of the present invention comprises an alarm signal intermittent drive means for outputting a drive signal for detecting a signal of a gas leak alarm, and a gas leak alarm. An alarm device connection detection intermittent drive unit that outputs a drive signal for detecting whether or not the connection is established; a drive signal determination unit that checks output signals of the alarm signal intermittent drive unit and the alarm device connection detection intermittent drive unit; An alarm signal input means for inputting a signal from a gas leak alarm at the time of driving signal output by the alarm signal intermittent driving means, and an alarm device for inputting an alarm signal connection signal at the time of driving signal output from the alarm device connection detection intermittent driving means. A connection input means, a gas leak determination means for determining presence / absence of gas leak from the alarm signal input means, and an alarm device connection is determined based on an output signal of the alarm device connection input means. Alarm connection determination means for determining the presence or absence of a different type of alarm connection when the signal determination means determines that there is no drive output signal, and interruption means for interrupting the medium flow path when the different type of alarm is determined to be connected by the alarm connection determination means. Consists of

When the gas leak alarm is connected to the gas shut-off device, it is determined that no drive signal is output from the alarm signal intermittent drive means and the alarm device connection detection intermittent drive means from the drive signal determination means. The signal output from the connection input means is determined by the alarm connection determination means as to whether or not a different type of alarm is connected. When the gas leak alarm is driven by the alarm connection detection intermittent driving means, the alarm connection input means is provided. The same alarm device connection signal is output when a different type of alarm device that performs voltage output is connected.However, the drive signal determination unit detects the alarm signal intermittent drive unit and the alarm device connection detection. If a signal is input from the alarm device connection input device while the intermittent drive device is stopped, an alarm device connection presence signal is output, whereas an alarm device connection presence signal is output, and an alarm device connection determination is made. It is possible to judge as a different type of alarm at the stage and to notify the gas consumer and the gas company of the abnormal connection of the gas leak alarm because the gas flow path is shut off and notified. And reliability and safety are improved.

According to a second embodiment of the present invention, in order to achieve the above object, an alarm signal intermittent drive means for outputting a drive signal for detecting a signal of a gas leak alarm and a gas leak alarm are connected. Alarm device connection detection intermittent drive means for outputting a drive signal for detecting whether the alarm signal intermittent drive means, the alarm signal connection detection intermittent drive means for confirming the output signal, and the alarm Alarm signal input means for inputting a signal from a gas leak alarm at the time of driving signal output by signal intermittent driving means, and alarm connecting input means for inputting an alarm signal connection signal at the time of driving signal output from the alarm device connection detecting intermittent driving means. Gas leak determining means for determining the presence / absence of gas leak from the alarm signal input means; and determining the alarm signal connection from the output signal of the alarm signal connection input means, An alarm device connection judging unit for judging the presence / absence of a heterogeneous alarm device connection when the drive signal is judged to have no output by the judging unit, and a warning notifying unit for notifying the heterogeneous alarm device connection judged by the alarm device connection judging device. Become.

When the gas leak alarm is connected to the gas shut-off device, when the drive signal determining means detects the absence of a drive output signal from the alarm signal intermittent drive means and the alarm device connection detection intermittent drive means, the alarm signal connection input means Since the signal output from is determined by the alarm device connection determination means whether or not it is a different type of alarm device,
Normally, when the gas leak alarm is driven by the alarm device connection detection intermittent drive means without outputting the different type alarm device detection signal, the alarm device connection input means performs the alarm device connection judgment, but the different type alarm device that performs voltage output is connected. A similar alarm device connection signal is also output when the alarm signal is input, but when the drive signal determination unit detects that the alarm signal intermittent drive unit and the alarm device connection detection intermittent drive unit have stopped driving, the alarm device connection input unit When a signal is input, the non-alarm device connection signal level is input, whereas
A signal indicating that an alarm device is present is output, but a different type of alarm device can be determined by the alarm device connection determination means, and a warning is issued by the warning notification device, so that the gas consumer and the gas company are alerted to the gas leak alarm device connection abnormality. The alarm can be notified, and abnormalities such as gas leaks can always be monitored accurately including the connection of the alarm device, and reliability and safety are improved.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First and second embodiments of the present invention will be described below with reference to FIGS. In FIGS. 1 and 2,
Components having the same functions as those in FIGS. 3 and 4 are denoted by the same reference numerals.

(Embodiment 1) FIG. 1 shows a gas shut-off device according to a first embodiment of the present invention. ing. Hereinafter, the gas cutoff device 30 will be described. Reference numeral 16 denotes an alarm signal intermittent drive unit which supplies a drive signal at predetermined time intervals to the photocoupler 8 of the gas leak alarm 2 via the + terminal of the terminal block 15 and the signal line 3. Reference numeral 17 denotes an alarm signal input means. When a drive signal is supplied to the gas leak alarm 2 by the alarm signal intermittent drive means 16, a signal indicating the presence or absence of a gas leak signal is output from the gas leak alarm 2 and detected. 18
Is a gas leak judging means for judging whether or not there is a gas leak based on the presence / absence signal of the gas leak signal detected by the alarm signal input means 17. When it is determined that there is a gas leak, a shutoff signal is output to the shutoff means 27.

Reference numeral 19 denotes an alarm device connection detection intermittent drive means for outputting a drive signal for detecting whether or not the gas leak alarm device 2 is connected. An alarm device connection input means 20 detects an alarm device connection presence / absence signal from the gas leak alarm device 2 when a drive signal is output from the alarm device connection detection intermittent drive means 19.
21 is an alarm device connection judging means,
When the gas leak alarm device 2 connection presence / absence signal is output, the connection of the gas leak alarm device 2 is determined. 22 is an abnormality determining means,
The shutoff determination level of the usage time of the gas appliance is changed by a signal indicating whether the alarm device is connected or not connected, which is determined by the alarm device connection determination unit 21. Reference numeral 23 denotes a drive signal judging means for confirming whether the periodically connected alarm device should be connected or not. The alarm signal intermittent drive signal 16 and the alarm device connection detection intermittent drive unit 19 are periodically checked. It is determined whether the drive signal is in an output state or a non-output state. Reference numeral 24 denotes a notification means for displaying a warning of the cutoff content. Further, a gas leak alarm device connection abnormality is notified to the gas company using a telephone line or the like, and a maintenance response is requested. 25 is a flow rate detecting means for detecting a gas flow rate of the used gas appliance and detecting an abnormality 22
Output to

Next, the operation of the above configuration will be described. When the gas shut-off device 30 is installed, the gas leak alarm 2 is installed as a gas leak monitor in a place where a kitchen, a stove, or the like is used, and is connected to the terminal block 28 of the gas shut-off device 30 via the signal line 3. Normally, a gas leak alarm 2 connected via a photocoupler 8 as shown in FIG. 1 is connected. A method of detecting connection of the gas leak alarm 2 and detecting a gas leak signal at this time will be described. A drive signal is periodically supplied to the anode side of the photodiode 8b of the gas leak alarm 2 via the minus terminal of the terminal block 28 by the alarm device connection detection intermittent drive means 19. The drive signal is output to the alarm device connection input means 20 through the cathode of the photodiode 8b and the positive terminal of the terminal block 28. When the drive signal enters the alarm device connection input means 20 via the photodiode 8b, the alarm device connection determination means 21 determines that the alarm device is connected, and outputs it to the abnormality determination means 22. Here, when the gas leak alarm 2 is not connected, the drive signal does not reach the alarm device connection input means 20 via the minus terminal, and a logic signal reverse to that at the time of connection detection is output from the alarm device connection determination means 21. You. in this case,
An unconnected signal is output to the abnormality determination means 22.

The abnormality determining means 22 stores the time limit for the use of the gas appliance as table data. The time limit is set to be long when the alarm device is connected and short when the alarm device is not connected. The threshold value for monitoring the use time of the gas appliance is selected by the output signal of the alarm device connection determination means 21. You. In accordance with the flow rate of the gas appliance detected by the flow rate detection unit 25, the abnormality determination unit 22 monitors the appliance usage time,
A shutoff signal is output to the abnormal shutoff means 12 to stop gas supply.

The gas leak signal from the gas leak alarm 2 is
The alarm signal is detected by periodically driving the alarm signal intermittent drive unit 16 at a different cycle from the alarm device connection detection intermittent drive unit 19. In the alarm device connection state, first, the drive signal output by the alarm signal intermittent drive means 16 is supplied to the phototransistor 8 a of the photocoupler 8 via the terminal block 28. At the time of non-gas leakage, the phototransistor 8a is off, at the time of gas leakage, the phototransistor 8a is on, and at the time of gas leakage, the drive signal reaches the gas leakage determination means 18 and does not reach at the time of non-gas leakage. . The alarm signal input means 17 detects whether or not the drive signal output from the alarm signal intermittent drive means 16 has arrived as a logic signal opposite to each other, and outputs it to the gas leak determination means 18. Gas leak determination means 18
Determines the presence or absence of a gas leak based on the presence or absence of a drive signal.
Outputs a cutoff signal. The result is notified by the notifying unit 24 of the cutoff content.

Further, the drive signal judging means 23 is provided with an alarm signal intermittent drive means 16 for periodically confirming the connected alarm device.
And the output state of the drive signal of the alarm device connection detection intermittent drive means 19 is determined. That is, whether the photo-coupler type gas leak alarm that should be connected or not is different.
Periodically check whether the gas leak alarm is output as a type of voltage signal.

First, the drive signal determination means 23 determines whether both the alarm signal intermittent drive means 16 and the alarm device connection detection intermittent drive means 19 are in the drive stop state. When the drive stop state is detected, the alarm at that time is issued. The signal from the device connection input means 20 is input to the alarm device connection determination means 21 to make a determination. That is, in the case of the gas leak alarm 2 which can be originally connected, which is a normal interface circuit of the photocoupler 8, the phototransistor 8a remains off and the alarm device connection input means 2
From 0, the same signal as when the alarm is not connected is detected. That is, the alarm device connection signal is detected only when the alarm device connection drive means 19 outputs the drive signal, and is not detected otherwise.

However, in the market, the gas leak alarm 2
The gas leak alarm 2 that outputs a signal that can directly drive the shut-off means 27 may be erroneously connected to the terminal block 28. In such a case, when both the intermittent alarm signal drive means 16 and the intermittent alarm signal detection drive means 19 detect that the drive output state is in the stopped state, the drive signal determining means 23 which periodically checks the alarm device detects an alarm. An alarm device connection signal is input from the device connection input means 20.

When the gas leak alarm 2 of the voltage output signal type is connected, the first voltage level, for example, 6 V, etc. is always applied to the terminal block 28 at the time of non-gas leak, and the second voltage level is detected at the time of gas leak detection. Is output, for example, 12V. Therefore, the alarm device connection input means 20 detects the same signal level as when the drive signal is output from the alarm device connection detection intermittent drive means 19. The alarm signal connection determination is performed in a state where no drive signal is output by the drive signal determination unit 23,
Since the alarm device connection signal is detected, which is supposed to be the alarm device non-connection, the different alarm device connection signal is output from the alarm device connecting means 21 to the shut-off means 12, and the gas supply is stopped. The state is reported by the reporting means 24.

Thus, even if the gas leak alarm 2 is erroneously connected, the alarm signal connection signal is detected when no drive signal is output from the alarm signal intermittent drive means 16 or the alarm signal connection detection intermittent drive means 19. Therefore, it is possible to identify a different type of alarm device connection, that is, an alarm device that should not be connected, and to notify a gas consumer and a gas company by stopping gas supply. Therefore, by continuing to use gas, the battery power supply will be lost without notice and the malfunction and danger of not being able to detect abnormalities when using gas appliances will be eliminated, and the immediate maintenance of safety monitoring devices such as gas leak alarms will be required. To improve safety and reliability. In the case of a voltage output type alarm device, even if gas leakage is detected, the alarm signal input means 17 cannot detect the alarm, but it is dangerous. However, the alarm device can be identified, and the user can be notified and safety is improved.

(Embodiment 2) FIG. 2 shows a gas shut-off device according to a second embodiment of the present invention. 2, components having the same functions as those in FIGS. 1, 3, and 4 are denoted by the same reference numerals, and description thereof will be omitted.

Reference numeral 26 in the gas shut-off device 30 is a warning reporting means for reporting, via a telephone line or the like, a state in which the gas leak alarm 2 which should not be connected to the security monitoring center of the gas company is connected. . Conversely, it has a two-way communication function that allows the gas company to confirm the connection type of the gas leak alarm 2.

Next, the operation of the above configuration will be described. The gas leak alarm 2 is connected to the terminal block 28 of the gas shutoff device 30.
Usually, the gas leak alarm 2 connected via a photocoupler 8 as shown in FIG. 2 is connected. A method of detecting connection of the gas leak alarm 2 and detecting a gas leak signal at this time will be described.
A drive signal is periodically supplied to the anode side of the photodiode 8b of the gas leak alarm 2 via the minus terminal of the terminal block 28 by the alarm device connection detection intermittent drive means 19. The drive signal is output to the alarm device connection input means 20 through the cathode of the photodiode 8b and the positive terminal of the terminal block 28. When the drive signal enters the alarm device connection input means 20 via the photodiode 8b, the alarm device connection determination means 21 determines that the alarm device is connected, and outputs it to the abnormality determination means 22. Here, when the gas leak alarm 2 is not connected, the drive signal does not reach the alarm device connection input means 20 via the minus terminal, and a logic signal reverse to that at the time of connection detection is output from the alarm device connection determination means 21. You. In this case, an unconnected signal is output to the abnormality determination unit 22.

The time limit for which the gas appliance can be used is stored in the abnormality determining means 22 as table data. The time limit is set long when the alarm is connected and short when the alarm is not connected. The threshold value for monitoring the use time of the appliance is selected by the output signal of the alarm device connection determination means 21. In accordance with the flow rate of the gas appliance detected by the flow detection unit 25, the abnormality determination unit 22 monitors the appliance use time, outputs a shutoff signal to the abnormal shutoff unit 12, and stops gas supply.

The gas leak signal from the gas leak alarm 2 is
The alarm signal is detected by periodically driving the alarm signal intermittent drive unit 16 at a different cycle from the alarm device connection detection intermittent drive unit 19. In the alarm connection state, first, the drive signal output by the alarm signal intermittent drive means 16 is supplied to the phototransistor 8 a of the photocoupler 8 via the terminal block 15. At the time of non-gas leakage, the phototransistor 8a is off, at the time of gas leakage, the phototransistor 8a is on, and at the time of gas leakage, the drive signal reaches the gas leakage determination means 18 and does not reach at the time of non-gas leakage. . The alarm signal input means 17 detects whether or not the drive signal output from the alarm signal intermittent drive means 16 has arrived as a logic signal opposite to each other, and outputs it to the gas leak determination means 18. Gas leak determination means 18
Determines the presence or absence of a gas leak based on the presence or absence of a drive signal.
Outputs a cutoff signal.

Further, the drive signal judging means 23 is provided with an alarm signal intermittent drive means 16 for periodically confirming the connected alarm device.
Then, the driving state of the alarm device connection detection intermittent driving means 19 is confirmed to determine whether or not a different type of alarm device can be confirmed. That is, it is periodically checked whether the gas leak alarm is a photocoupler type that should be connected or a gas leak alarm that outputs the presence or absence of gas leak detection as two different voltage signals.

First, the drive signal determination means 23 determines whether the alarm signal intermittent drive means 16 and the alarm device connection detection intermittent drive means 19 are both in the driving stop state, and outputs the signal from the alarm device connection input means 20 at that time to the alarm device connection. The input is made by the determination means 21 to make a determination. That is, in the case of the gas leak alarm 2 which can be originally connected, which is a normal interface circuit of the photocoupler 8, the phototransistor 8a remains in the OFF state, and the alarm signal connection input means 20 outputs the same signal as in the alarm non-connection state. Is detected. That is, the alarm device connection signal is detected only when the alarm device connection drive means 19 outputs the drive signal, and is not detected otherwise.

However, in the market, the gas leak alarm 2
The gas leak alarm 2 that outputs a signal that can drive the shut-off means 12 more directly may be connected to the terminal block 15 by mistake. In such a case, when the drive signal determination means 23, which periodically checks the alarm device, detects that both the alarm signal intermittent drive device 16 and the alarm device connection detection intermittent drive device 19 are in the drive output stop state, the alarm device connection is performed. An alarm device connection signal is input from the input means 20.

When the gas leak alarm 2 of the voltage output signal type is connected, the first voltage level, for example, 6 V, etc. is always applied to the terminal block 28 at the time of non-gas leak, and the second voltage level is detected at the time of gas leak detection. Is output, for example, 12V. Therefore, the alarm device connection input means 20 detects the same signal level as when the drive signal is output from the alarm device connection detection intermittent drive means 19. When the drive signal determination means 23 originally detects a state in which no drive signal is output, an alarm device connection determination is performed. When the alarm device connection state signal is detected at this time, it is determined that an alarm device that should not be connected is connected. Then, a different type of alarm device connection signal is output from the alarm device connection unit 21 to the warning notification unit 26, and transmitted to the gas company via a public line such as a telephone line by a communication unit.

Even if the gas leak alarm device 2 is incorrectly connected in this way, when the alarm signal intermittent drive means 16 and the alarm device connection detection intermittent drive means 19 detect that neither drive signal is output. Since an alarm device connection signal is detected, it can be determined that a different type of alarm device is connected, that is, it can be identified as an alarm device that should not be connected, and a gas leak alarm device connection abnormality is notified to a gas customer and a gas company as a warning. Therefore, by continuing to use gas, the battery power supply will be lost without notice and the malfunction and danger of not being able to detect abnormalities when using gas appliances will be eliminated, and the immediate maintenance of safety monitoring instruments such as gas leak alarms shall be required. To improve safety and reliability. In the case of a voltage output type alarm device, even if gas leakage is detected, the alarm signal input means 17 cannot detect the alarm, but it is dangerous. However, the alarm device can be identified, and the user can be notified and safety is improved.

[0035]

As described above, according to the first aspect of the present invention, when the drive signal is output by the normal alarm device connection detection intermittent drive means and the gas leak alarm device is driven, the alarm device connection input means is used. Perform alarm device connection determination. At this time, the same alarm device connection signal is output as when a different type of alarm device that performs voltage output is connected when the drive signal determination unit is in the drive signal stopped state, but the non-alarm device connection signal level is originally input. On the other hand, the alarm device connection presence signal is output, so that the alarm device connection determination means can determine that the device is a different type of alarm device. Further, the gas flow path is shut off. It is possible to warn of alarm device connection abnormalities, and the battery voltage will be lost without notice, and it will no longer be possible to monitor the gas equipment used by gas consumers as a gas shut-off device. There is an effect that it can be performed accurately and reliability and safety are improved.

According to the second aspect of the present invention, when the gas leak alarm is connected to the gas shut-off device, the drive signal determining means periodically switches the alarm signal intermittent drive means and the alarm device connection detection intermittent drive means. Is determined to be in a driving stop state, and at that time, the signal output from the alarm device connection input means is determined by the alarm device connection determination means as to whether or not it is a heterogeneous alarm device. When the alarm device is driven, the alarm device connection is determined by the alarm device connection input means, and a similar alarm device connection signal is output when a different type of alarm device that performs voltage output is connected. When both the intermittent alarm signal driving means and the intermittent alarm device detection intermittent driving means are stopped, if a signal is input from the alarm device connection input device, the non-alarm device connection signal level is input, but the alarm device is connected. Signal Since it is activated, it can be judged as a different type of alarm by the alarm device connection judging means, an alarm can be issued by the alarm notifying device and a warning can be given to the gas consumer and the gas company about the abnormal connection of the gas leak alarm device. This eliminates the problem that the battery voltage is lost and the gas consumer cannot monitor abnormalities of gas appliances used by the gas consumer as a gas shut-off device. This has the effect of improving safety.

[Brief description of the drawings]

FIG. 1 is a control block diagram of a gas cutoff device according to a first embodiment of the present invention.

FIG. 2 is a control block diagram of a gas shutoff device according to a second embodiment of the present invention.

FIG. 3 is a control block diagram showing a conventional gas shut-off device.

FIG. 4 is a control block diagram showing another conventional gas shut-off device.

[Explanation of symbols]

 2 Gas Leakage Alarm 16 Alarm Signal Intermittent Driving Means 17 Alarm Signal Input Means 18 Gas Leak Determination Unit 19 Alarm Connection Detection Intermittent Driving Unit 20 Alarm Connection Input Unit 21 Alarm Connection Determination Unit 23 Drive Signal Determination Unit 26 Warning Notification Unit 27 shut-off means 30 gas shut-off device

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Akira Matsuda 1006 Kadoma Kadoma, Osaka Pref. Matsushita Electric Industrial Co., Ltd. (72) Inventor Kazutaka Asano 1006 Odaka Kadoma Kadoma, Osaka Pref. Matsushita Electric Industrial Co. (72) Inventor Kaoru Onishi 1006 Kazuma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor Jiro Mizukoshi 2975 Motoe, Shinminato City, Toyama Toyo Gas Meter Co., Ltd. (72) Inventor Noboru Isono 2975 Motoe, Shinminato, Toyo Gas Meter Co., Ltd. (72) Inventor Fujio Hori 2975, Motoe, Shinminato, Toyama Pref. HH04 5H223 AA11 BB01 EE02

Claims (2)

[Claims] An alarm signal intermittent drive means for outputting a drive signal for detecting a signal of a gas leak alarm device, and an alarm device connection detection for outputting a drive signal for detecting whether or not the gas leak alarm device is connected. Intermittent drive means, a drive signal determination means for confirming the output signal of the alarm signal intermittent drive means and the alarm device connection detection intermittent drive means, and a drive signal output from the gas leak alarm device by the alarm signal intermittent drive means. Alarm signal input means for inputting a signal, alarm device connection input means for inputting an alarm device connection signal at the time of driving signal output from the alarm device connection detection intermittent drive means, and presence / absence of gas leakage from the alarm signal input means Gas leak determination means and an alarm device connection is determined based on an output signal of the alarm device connection input means, and when the drive signal determination means determines that there is no drive output signal, a different type of alarm device connection is performed. Gas cutoff apparatus equipped with alarm connection determination means for determining the presence or absence, and a blocking means for blocking the medium flow path if it is determined that the heterologous alarm connected by the alarm device connection determination means. 2. An alarm signal intermittent drive means for outputting a drive signal for detecting a signal of a gas leak alarm device, and an alarm device connection detection for outputting a drive signal for detecting whether or not the gas leak alarm device is connected. Intermittent drive means, a drive signal determination means for confirming the output signal of the alarm signal intermittent drive means and the alarm device connection detection intermittent drive means, and a drive signal output from the gas leak alarm device by the alarm signal intermittent drive means. Alarm signal input means for inputting a signal, alarm device connection input means for inputting an alarm device connection signal at the time of driving signal output from the alarm device connection detection intermittent drive means, and presence / absence of gas leakage from the alarm signal input means Gas leak determination means, and a different type of alarm device when an alarm device connection is determined from an output signal of the alarm device connection input device, and when the drive signal determination means determines that no drive signal is output. And determining alarm connection determining means whether a connection, the gas shutoff device including a warning notification unit for reporting different alarm connections determined in the alarm device connection determination means.