JP4760869B2 - Gas shut-off device - Google Patents

Description

  The present invention relates to a gas shut-off device that monitors the usage state of a gas appliance using city gas, LP gas, or the like, and relates to a gas shut-off device that ensures safety when the power capacity of a battery power source is consumed.

As shown in the block diagram of FIG. 6 , this type of conventional gas shut-off device has a battery power supply means 2 for supplying power to the entire gas shut-off device. 3 is a shut-off valve (shut-off means) that stops or supplies gas in the flow path.

Reference numeral 4 denotes a voltage drop detection unit, which detects a battery voltage in an exhausted state where the capacity of the battery power supply means 2 capable of operating the gas shut-off device 1 within a predetermined operation guarantee time is detected and outputs a voltage drop signal A To do. 5 is an opening acceptance unit that accepts opening of the shut-off valve from the time when the voltage drop signal A is input, and opens when there is an opening request (opening request switch or input of an opening signal by communication). A plug request signal is output. A timer unit 6 counts a predetermined operation guarantee time from the time when the voltage drop signal A is input, and outputs a plug opening completion signal D.

Reference numeral 7 denotes an opening function stop unit which outputs a closing stop signal E for stopping the opening according to the opening request signal C when the opening end signal D is input. Reference numeral 8 denotes a gas shut-off control unit which, when a battery voltage drop signal A or a closure stop signal E is input, closes the shut- off valve 3 (shut-off means) , and the opening request signal C is received before the input signal of the closure stop signal E. When input, the shut-off valve 3 (shut-off means) is opened.

Next, the operation of the configuration of the conventional example will be described. When the voltage drop detection unit 4 checking the consumption level of the battery power supply means 2 detects the battery consumption voltage, it outputs a voltage drop signal A to the unplug accepting unit 5, the timer unit 6, and the gas cutoff control unit 8. The gas cutoff control unit 8 to which the voltage drop signal A has been input outputs the first cutoff command signal B1, operates the cutoff valve 3 (shutoff means) , and executes the opening of the gas passage. When the voltage drop signal A is input, the timer unit 6 starts counting, and until the timer unit 6 finishes counting for a predetermined time, there is an opening request to the opening acceptance unit 5, and the opening request signal C Is output, the gas cutoff control unit 8 opens the cutoff valve 3 (shut-off means) . When the timer unit 6 finishes counting, since the plug opening end signal D is output, the plug opening function stop unit 5 outputs the plug opening stop signal E and stops accepting the plug opening request. The gas shut-off device 1 to which the shut-off stop signal E is input outputs the second shut-off command signal B2 and closes the shut- off valve 3 (shut-off means) .

In the gas shut-off device 1 attached to the flow path through which the medium gas such as city gas or LP gas flows, the voltage drop detection unit 4 measures the voltage of the battery power supply means 2 at a predetermined time interval and monitors the degree of battery consumption. Yes. A lower limit voltage at which the gas shut-off device 1 can be operated is set in advance as an operation guarantee voltage, and a voltage value when the voltage is reversed for a required number of days from here is set as a battery consumption voltage. The voltage drop detection unit 4 monitors the battery voltage and detects the battery voltage when the battery is consumed. That is, until the battery shut-off valve 3 (shut-off means) can be opened and the gas shut-off device 1 is replaced only during the period when the voltage of the battery power source means 2 is reduced to the operation guarantee voltage after the battery consumption voltage is detected for the required days. A grace period is provided (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 10-103546

However, the conventional configuration has the following problems. When the gas shut-off device enters a low temperature environment such as below freezing in the winter, and when the battery drop detecting unit 4 checks the voltage value of the battery power source means 2 when the temperature is abnormally low due to cold waves, etc. In some cases, the voltage value may be further lower than in the case where the battery voltage is low, and although the battery consumption is small, the voltage drop detection unit 4 erroneously determines that the battery voltage is in a predetermined consumption state and outputs a voltage drop signal A to output the timer unit. 6 starts counting, and the gas shutoff control unit 8 drives the shutoff valve 3 (shutoff means) to stop the gas supply. For this misjudgment, for example, a customer uses a gas appliance. In the case of cooking, there is a problem that cooking is not possible because cooking is not possible.

  The present invention solves the above problem, and even if a battery voltage drop state is detected, it is determined whether the battery is low due to battery consumption or a battery drop due to an erroneous determination, and the safety is improved by improving usability while ensuring safety. The object is to provide a highly reliable gas shut-off device.

In order to solve this problem, the present invention periodically monitors the supply voltage of the battery power supply means for supplying and shutting off the gas medium and the voltage detecting means for power supply and shuts off the battery capacity estimation means. The battery consumption is estimated from the number of times the device is driven and the time elapsed since the power is turned on, and a signal below a predetermined voltage is output from the voltage detection means even though the estimated consumption capacity in the battery capacity estimation means is within a predetermined range. In this case, the voltage detection means is driven and the voltage of the battery power supply means is checked again, and the voltage drop signal is not output when the normal voltage is detected, the voltage detection means is driven again to check the battery voltage and the voltage abnormality determination means sets the voltage drop state. Time measurement means for starting measurement of a predetermined time at the time of detection, return means for outputting a signal for returning the shut-off means to a gas supply enabled state, and recovery for prohibiting input of a return signal when a predetermined time has passed by the time measurement means. And a configuration consisting of a prohibited means.

  For this reason, for example, the voltage detection means may detect that the supply voltage of the battery power source is lower than a predetermined voltage due to the influence of temporary abnormal low temperature weather during the winter. When the battery is confirmed, a normal voltage is detected. In this case, the battery voltage detection means first does not output the lowering signal detected by the battery voltage detection means as an erroneous signal to the time measurement means by the battery abnormality determination means, so that the battery capacity is sufficient. The time measurement means starts to measure the time erroneously when the battery is low, and the shut-off means is driven into the shut-off state after a predetermined time has passed, or the battery abnormality is not displayed due to the misjudgment on the notification means. For example, while a customer is cooking, time does not elapse due to a misjudgment, and the gas is not stopped and the gas cannot be used, improving usability and reliability.

According to the present invention, the battery power supply means for supplying power, the cutoff means for supplying and shutting off the gas medium, the voltage detection means for monitoring the supply voltage of the battery power supply means and detecting the battery voltage, and the cutoff means Battery capacity estimation means for estimating the battery consumption from the number of times of driving and the elapsed time from the start of power supply, and a signal below the predetermined voltage is output from the voltage detection means when the consumption capacity of the battery capacity estimation means is within a predetermined range In this case, the voltage detection means drives the voltage detection means again and outputs a voltage drop signal at the time of low voltage detection, and the voltage abnormality determination means starts measuring a voltage drop state for a predetermined time, and after the predetermined time has passed, Time measurement means for outputting a shut-off, a return means for outputting a signal for returning the shut-off means to a gas supply enabled state, and input of a return signal when a predetermined time elapses in the time measurement means is prohibited. The battery power supply voltage is detected by the voltage detection means to be below the specified voltage due to the influence of abnormal cold weather in winter, etc. even though the battery consumption is small and the battery capacity is still sufficient. In order to prevent abnormal notifications from being displayed on the notification means and notification of abnormalities to gas companies, etc., the time after the start of power supply to the battery power supply means and the number of shut-off / return times of the shut-off means that consume the most battery capacity The battery capacity estimation means calculates the remaining battery capacity from the battery capacity estimation means, etc., and the voltage detection means drives the voltage detection means again even if the voltage detection means outputs a battery low signal if it is within the predetermined consumption, so that when normal voltage is detected, The first battery low detection is determined as an error signal, the time measurement by the time measurement means is held in a stopped state and the shut-off means is not driven, and the customer uses a gas stove etc. and the time elapses due to an erroneous determination during heating Shi gas Sealed usability improves reliability rather be a gas unusable state is extremely improved.

  Also, battery power supply means for supplying power, shutoff means for supplying and shutting off the gas medium, voltage detection means for monitoring the supply voltage of the battery power supply means and detecting the battery voltage, the number of times the shutoff means is driven and Battery capacity estimation means for estimating battery consumption from the elapsed time from the start of power supply; and when the consumption capacity of the battery capacity estimation means is within a predetermined value and a signal lower than a predetermined voltage is output from the voltage detection means, the voltage detection Voltage abnormality determining means for stopping output of the battery voltage drop signal from the means and outputting when the battery consumption capacity is equal to or greater than a predetermined value, and measuring the voltage lowering state for a predetermined time when the voltage abnormality determining means is detected, and the blocking means after a predetermined time has elapsed A time measuring means for outputting a shut-off signal, a return means for outputting a signal for returning the shut-off means to a gas supply enabled state, and a return signal when a predetermined time elapses in the time measuring means. By providing the return prohibiting means for prohibiting power, the battery power supply voltage is less than the predetermined voltage by the voltage detecting means due to the influence of abnormal low temperature weather etc. even though the battery consumption is small and there is still enough battery capacity. In order to prevent abnormal indications from being displayed on the notification means or notification of an abnormality to the gas company, etc., the time after the start of power supply to the battery power supply means and the shutoff means that consumes the most battery capacity are detected. The battery capacity estimation means calculates the remaining battery capacity from the number of restorations, etc., and the remaining battery capacity is estimated. Keeping the measurement in a stopped state and not driving the shut-off means, the customer uses a gas stove, etc., and the time does not pass due to misjudgment during heating, and the gas is not stopped and the gas cannot be used. Messenger Selfishness is extremely improved.

  Also, battery power supply means for supplying power, shutoff means for supplying and shutting off the gas medium, voltage detection means for monitoring the supply voltage of the battery power supply means and detecting the battery voltage, the number of times the shutoff means is driven and Battery capacity estimation means for estimating battery consumption from the elapsed time from power-on, and when the consumption capacity of the battery capacity estimation means is within a predetermined range, even if a signal below a predetermined voltage is output from the voltage detection means, When the voltage detection means is driven and a normal voltage is detected, the time measurement means continues to stop time measurement, and the voltage abnormality determination means for maintaining the input permission state to the return prohibition means, and when the voltage abnormality determination means detects a voltage drop state A time measuring means for measuring a predetermined time; a return means for outputting a signal for returning the shut-off means to a gas supply enabled state; a flow rate detecting means for measuring a gas supply amount; External device means for detecting an abnormal state of the above, an abnormality determining means for determining whether the gas appliance is in an abnormal use state from a signal from the flow rate detecting means or the external device means, and outputting a cutoff signal at the time of determination of abnormal use, During the time measurement by the time measurement means, when the abnormal flow rate is detected by the flow rate detection means, or when abnormal gas leakage or an earthquake exceeding a predetermined level is detected by the external device means, a cutoff signal is output to the cutoff means and a return signal is input. By providing a prohibition function for prohibiting return, even if the time from the start of power supply by the battery power supply is short, for example, rainwater may be submerged and the battery may be consumed. When the voltage detection means detects that the supply voltage of the battery power supply is lower than the predetermined voltage due to abnormal low temperature weather, etc. The battery capacity estimation means calculates the consumption from the number of interruptions / returns of the interruption means that consumes the battery capacity, estimates the remaining battery capacity, and if it is determined that it is within the predetermined consumption, the voltage detection means outputs a battery low signal. The voltage detection means is driven again, and as a result, the low voltage state is detected, but the time measurement means starts measuring time due to the voltage drop state, and when an abnormal flow rate is detected for a predetermined time, or a gas leak or an abnormally large earthquake When the gas detection system is detected, the gas supply is stopped and the gas supply is stopped and cannot be restored. To prevent the battery from being consumed, and as a result, it is possible to prevent the gas from being stopped even though the shut-off condition is satisfied due to an abnormal gas leak, and the safety and reliability are improved and the usability is greatly improved.

Also, battery power supply means for supplying power, shutoff means for supplying and shutting off the gas medium, voltage detection means for monitoring the supply voltage of the battery power supply means and detecting the battery voltage, the number of times the shutoff means is driven and Battery capacity estimation means for estimating battery consumption from the elapsed time from the start of power supply, and when the consumption capacity of the battery capacity estimation means is within a predetermined value and a signal equal to or lower than a predetermined voltage is output from the voltage detection means, the voltage again When a signal for driving the detection means is output, a voltage abnormality determination means for outputting a voltage drop signal at the time of low voltage detection and a signal for driving the voltage detection means again by the battery abnormality determination means are output after a predetermined time delay. Time delay means for outputting a drive signal to the voltage detection means, and measurement of a voltage drop state at the time of detection of a voltage drop state by the voltage abnormality determination means, and a cutoff output to the cutoff means after a predetermined time has elapsed Time measuring means, a return means for outputting a signal for returning the shut-off means to a gas supply enabled state, and a return prohibiting means for prohibiting input of a return signal when a predetermined time elapses in the time measuring means. If the battery power supply voltage is below the specified voltage by the voltage detection means due to the influence of abnormally low temperature weather, etc. even though the battery consumption is small and the battery capacity is still sufficient, the notification means may display an abnormality. In order to prevent abnormal notification to gas companies, etc., the battery capacity estimation means calculates the amount of consumption based on the time after the start of power supply to the battery power supply means and the number of shut-off / return times of the shut-off means that consume the most battery capacity. If the remaining battery capacity is estimated and the voltage consumption is within the predetermined consumption, when the voltage detection means outputs a battery low signal, a signal for driving the voltage detection means is output again. Since the voltage detection means is driven after the lapse of time, the battery voltage is detected in the time zone in which the gas appliance is used well, deviating from the time zone in which the voltage drop signal is detected. Therefore, it is determined that the first battery low detection is an erroneous signal, the time measurement by the time measurement means is held in a stopped state and the shut-off means is not driven, and the customer uses a gas stove or the like during heating. The gas does not stop due to the erroneous determination and the gas cannot be used, and the reliability is improved and the usability is improved.

Also, battery power supply means for supplying power, shutoff means for supplying and shutting off the gas medium, voltage detection means for monitoring the supply voltage of the battery power supply means and detecting the battery voltage, the number of times the shutoff means is driven and Battery capacity estimation means for estimating battery consumption from the elapsed time from the start of power supply, and when the consumption capacity of the battery capacity estimation means is within a predetermined value and a signal equal to or lower than a predetermined voltage is output from the voltage detection means, the voltage again A voltage abnormality determination unit that outputs a voltage drop signal at the time of detection of a low voltage when a signal for driving the detection unit is output, and the voltage detection unit each time a signal for driving the voltage detection unit is output again by the battery abnormality determination unit. A delay time variable means for outputting a drive signal to the voltage detection means while varying the time for driving the means, and the voltage abnormality determination means starts measuring a predetermined time when the voltage drop state is detected. A time measuring means for shutting out and outputting to the shutting means after a lapse of time, a return means for outputting a signal for returning the shutting means to a gas supply enabled state, and prohibiting the input of a return signal when a predetermined time has passed by the time measuring means. When the abnormal low-temperature weather or the like continues even though the battery consumption is small and the battery capacity is still sufficient, the voltage detection means detects that the supply voltage of the battery power supply is lower than the predetermined voltage. In order to prevent abnormal indications from being displayed on the notification means and notifications of abnormalities to gas companies, etc., the time and the battery capacity after the start of power supply to the battery power supply means are consumed. The battery capacity estimation means calculates the remaining battery capacity based on the number of shut-off / return times of the shut-off means, and the remaining battery capacity is estimated. In order to drive the detection means and accurately measure the battery voltage, and because this is likely to occur frequently in winter, when a voltage drive signal is output from the voltage abnormality determination means, the delay time variable means is activated by that signal. Since the voltage detection means is driven by varying the predetermined time value for each occurrence, the battery voltage can be determined in various time periods delayed from the time period in which the voltage drop signal was detected, and the drop voltage signal is input Since the delay time variable means changes the time until the voltage detection means is driven again and re-determination is performed, the battery voltage can be measured accurately on average when the battery capacity is sufficient, and the normal battery voltage is detected as a result. The first battery low detection is determined to be an erroneous signal, the time measurement by the time measurement means is kept in a stopped state, the shut-off means is not driven, and the customer uses a gas stove etc. The gas is not stopped and the gas cannot be used after a lapse of time, and the reliability is improved and the usability is improved.

In order to achieve the above object, the first aspect of the present invention periodically monitors battery power supply means for supplying power, shut-off means for supplying and shutting off a gas medium, and supply voltage of the battery power supply means. voltage detecting means for detecting a battery voltage, elapsed and the battery capacity estimation means for estimating a battery life than the time, battery consumption estimated by the battery capacity estimation means from the driving frequency and the power supply start of the blocking means is a predetermined by driving the voltage detecting means again when a predetermined voltage or less of the signal is output from the voltage detecting means within consumption, the voltage abnormality determining means determines that the voltage drop upon detecting a low voltage, the voltage abnormality and outputs a time measurement means for blocking output to the blocking means after a predetermined time has elapsed the start of the time measurement when the detection voltage drop state determining means, a signal for returning the blocking means to the gas supply state And return means, and a return inhibition unit to input disable a return signal from the return means when a predetermined time elapses in the time measuring means.

  If the battery power consumption is small and the battery capacity is still sufficient, but the voltage detection means detects that the supply voltage of the battery power supply is below the specified voltage due to abnormal cold weather, etc. In order to prevent abnormal notification to gas companies, etc., the battery capacity estimation means calculates the amount of consumption based on the time after the start of power supply to the battery power supply means and the number of shut-off / return times of the shut-off means that consumes the most battery capacity. If the remaining battery capacity is estimated and within the predetermined consumption, even if the voltage detection means outputs a battery low signal, the voltage detection means is driven again. As a result, when normal voltage is detected, the first battery low detection is determined to be an erroneous signal. However, the time measurement by the time measurement means is held in a stopped state and the shut-off means is not driven, and the customer uses a gas stove or the like, and the gas is stopped due to an erroneous determination during heating and the gas is stopped and the gas cannot be used. Become Reliability is increased ease of use has been improved without the.

Further, since the present invention is to achieve the above object, in the first invention, the flow rate detection unit for measuring the gas supply amount, and the external apparatus for detecting an abnormal condition, such as gas leakage, earthquakes, the flow rate detecting unit and the An abnormal determination means that determines whether the gas appliance is in an abnormal use state from a signal from an external device means, and outputs a cutoff signal at the time of determination as abnormal use, and an abnormal flow rate is detected by the flow rate detection means during time measurement by the time measurement means or also remains turned off of the blocking means in the input inhibit a return signal from said return means and outputs a shutoff signal to the shutoff unit when an abnormal gas leakage or a predetermined or more earthquake detection by said external device means The return prohibiting means is provided .

  And even if the time from the start of power supply by the battery power supply is short, for example, rainwater may be inundated and the battery may be consumed, but under such circumstances the voltage detection means under the influence of abnormal low temperature weather etc. If the battery power supply voltage is detected to be less than or equal to the predetermined voltage, the battery capacity estimation means uses the time after the battery power supply means starts to supply power, the number of shut-off / return times of the shut-off means that consumes the most battery capacity, etc. When the consumption is calculated and the remaining battery capacity is estimated, and it is determined that it is within the predetermined consumption, even if the voltage detection means outputs a battery low signal, the voltage detection means is driven again, and as a result, the low voltage state is detected. When the time measuring means starts measuring time due to the voltage drop state and an abnormal flow rate is detected or a gas leak or an abnormally large earthquake is detected for a predetermined time, the shut-off means is driven to stop the gas supply and return. In other words, the gas supply is impossible again. Even if the shutoff condition is established due to an abnormality, it is possible to prevent the gas from being stopped, and safety and reliability are improved, so that usability is greatly improved.

Furthermore, in order to achieve the above object, according to the first aspect of the present invention, in the first invention, the voltage abnormality determination means is a signal having a battery consumption estimated by the battery capacity estimation means within a predetermined consumption, and a signal below the predetermined voltage by the voltage detection means. Is output again after a predetermined time delay, a voltage abnormality determination unit that outputs a voltage drop signal at the time of low voltage detection when the signal for driving the voltage detection unit is output again, and the voltage detection unit again by the battery abnormality determination unit Is driven and when a voltage equal to or lower than a predetermined voltage is detected, it is determined that the battery voltage has dropped .

  If the battery power consumption is small and the battery capacity is still sufficient, but the voltage detection means detects that the supply voltage of the battery power supply is below the specified voltage due to abnormal cold weather, etc. In order to prevent abnormal notification to gas companies, etc., the battery capacity estimation means calculates the amount of consumption based on the time after the start of power supply to the battery power supply means and the number of shut-off / return times of the shut-off means that consumes the most battery capacity. If the remaining battery capacity is estimated and the voltage consumption is within the predetermined consumption, when the voltage detection means outputs a battery low signal, a signal for driving the voltage detection means is output again. Since the voltage detection means is driven after the lapse of time, the battery voltage is detected by deviating from the time zone in which the voltage drop signal is detected, so if the battery capacity remains as a result, the normal battery voltage is detected. The bottom detection is determined to be an erroneous signal, the time measurement by the time measurement means is held in a stopped state and the shut-off means is not driven, and the gas is stopped due to a misjudgment during heating by a customer using a gas stove or the like. In addition, the gas is not unusable and the reliability is improved and the usability is improved.

Furthermore, in order to achieve the above object, the present invention is configured such that the predetermined time can be varied in the third invention .

  And if the battery consumption is small and there is still enough battery capacity, but the winter temperature abnormal low temperature weather etc. continue, if the voltage detection means detects that the supply voltage of the battery power supply is below the predetermined voltage, the notification means will display an abnormality. In order to prevent abnormal notifications to gas companies, etc., the amount of battery consumption estimated by the battery capacity estimation means based on the time since the start of power supply to the battery power supply means and the number of interruptions / returns of the interruption means that consumes the most battery capacity Calculate and estimate the remaining battery capacity. If the voltage detection means outputs a battery low signal when it is within the specified consumption, voltage drive from the voltage abnormality judgment means to drive the voltage detection means again and accurately measure the battery voltage Each time a signal is output, the delay time varying means is activated by that signal, and the voltage detecting means is driven in a different time zone each time, that is, each delay time varying means is supplied with a reduced voltage signal. Since the time until the detecting means is driven is varied and re-determination is performed, if the battery capacity is sufficient, the average driving capacity level of the day can be determined, the battery voltage can be accurately measured, and the result is a normal battery. Since the voltage is detected, it is determined that the first battery low detection is an erroneous signal, the time measurement by the time measurement means is held in a stopped state, the shut-off means is not driven, and the customer is heating using a gas stove etc. In this case, the gas is not stopped due to erroneous determination and the gas cannot be used, and the reliability is improved and the usability is improved.

Hereinafter, the first present invention, second, third, 1 fourth and fifth embodiments, 2, 3, 4, will be described with refer to FIG. 1, 2, 3, 4, and 5, the same reference numerals are given to components having the same functions as those in FIG. 6.

(Embodiment 1)
FIG. 1 shows a gas shut-off device according to a first embodiment of the present invention, wherein 9 is a control means of the gas shut-off device, 10 is a voltage detection means and measures the battery voltage of the battery power supply means 2. That is, the output voltage of the battery power supply means 2 is monitored, and when a voltage higher than a predetermined value is detected, a normal signal is output, and when a voltage drop is detected below a predetermined value, a voltage drop signal is output. Reference numeral 11 denotes a battery capacity estimation unit which calculates a battery consumption amount from an elapsed time from the start of power supply by the battery power source unit 2 and an average current consumption of the control unit 9 which is stored and set in advance. Further, the consumption amount is calculated from the number of times of driving and returning of the interruption means 3 and the average current consumption, and is added to the consumption amount in the control means 9. Reference numeral 12 denotes a battery abnormality determination means, which determines whether the battery voltage is normal or in a lowered state from the estimated battery capacity value from the battery capacity estimation means 11 and the voltage measurement value from the voltage detection means 10, and is determined to be the first decrease. At this time, the voltage detecting means 10 is driven again to measure the battery voltage. If the battery voltage drops again, a voltage drop signal is output, and if it is a normal voltage, a normal signal is output. Reference numeral 13 denotes time measuring means, which starts time measurement when a voltage drop signal is inputted, and outputs a signal for driving the interruption means 3 after a predetermined time has elapsed. That is, counting of the usable time of the gas cutoff device after the battery voltage drop is started. That is, the time during which the safety monitoring of the usage state of the gas appliance can be performed in a normal voltage range is performed.

Reference numeral 14 denotes a return means which, when operated, outputs a return signal from the shut-off means 3 to start gas supply to the shut-off means 3. Reference numeral 15 denotes a return prohibiting means, which determines whether or not to output a return signal from the return means 14 to the blocking means 3, and outputs it if the return prohibiting state is not set, thereby opening the blocking means 3. When the measurement of the usable time is completed, that is, when a predetermined time has elapsed, the time measuring means 13 prohibits the return prohibiting means 15 from inputting the return instruction signal from the returning means 14 , and the blocking means 3 remains in the blocking state. maintain. On the other hand, a battery voltage drop signal is output to the time measuring means 18, and before the time measuring means 13 reaches a predetermined time, a shut-off signal is output from the abnormality determining means 12 to the shut-off means 3 and the return prohibiting means 15 is shut off. When the signal is input, the return prohibiting means 15 does not accept the return signal from the shutting means 3 from the return means 14 and keeps the shut off state. Reference numeral 16 denotes a notification means, which displays a warning when the battery abnormality determination means 12 detects a battery low abnormality, and also displays a gas (LCD, LED element, etc.) when the time measurement means 13 drives the shut-off means 3 after a predetermined time has elapsed. Notify the user and gas company, or notify the gas security center using a communication line.

  Next, the operation of the above configuration will be described. A gas shut-off device is installed to monitor the use of gas appliances by gas consumers. When the battery power supply means 2 starts supplying power, the battery capacity estimation means 11 calculates the battery capacity consumption from the elapsed time and the average current of the control device 9.

  Since a large current flows when the interruption means 3 is activated halfway, it is added to the consumption for each operation. In this way, the amount of battery capacity consumed is estimated. On the other hand, the voltage detection means 10 periodically monitors the voltage of the battery power supply means 2. When the voltage is lower than the predetermined voltage, a voltage drop signal is output to the voltage abnormality determination means 12. When the voltage is equal to or higher than the predetermined voltage value, a normal signal is output to the battery abnormality determination means 12. The voltage abnormality determination unit 12 determines whether or not the voltage drop is abnormal from the battery capacity consumption from the battery capacity estimation unit 11 and the voltage signal from the voltage detection unit 10.

  The voltage detection means 10 may detect a voltage drop state under abnormal weather such as a cold wave in winter. The voltage detection means 10 operates periodically and measures the capacity of the battery power supply means 2, but the above-mentioned thing may occur if there is time and the measurement is started. When a voltage drop signal is output from the voltage detection means 10, the battery abnormality determination means 12 determines whether or not the battery capacity of the battery capacity estimation means 11 is consumed over a predetermined value. In the case of several years after installation, that is, when the battery consumption is small, a signal for driving the voltage detecting means 10 is output again. The voltage detection means 10 checks the battery voltage when the re-drive signal is input. As a result, when a normal voltage is detected, that is, when a voltage value equal to or higher than a predetermined value is detected, a normal signal is output to the voltage abnormality determination means 12. In this case, the voltage drop signal from the first voltage detection means 10 is determined to be an erroneous signal, and is not determined to be a voltage abnormality by an erroneous determination signal associated with transient abnormal weather. The time measuring means 13 maintains the stopped state as it is.

  On the other hand, the battery consumption capacity is less than the number of times of operation of the shut-off means 3 (total number of shut-offs and restorations) and the elapsed time for some reason, and the voltage may drop due to inundation such as rainwater. May be detected and output to the voltage abnormality determination means 12, and the voltage detection means 10 may be driven again to output the voltage reduction signal again even if the battery voltage is confirmed. As described above, in the second case, the voltage abnormality determination unit 12 determines that the voltage is in a low state, outputs a voltage decrease state signal to the time measurement unit 13, and starts time measurement. The return prohibiting means 15 is also notified. Further, a warning display of a low battery voltage state is displayed on the notification means 16 (the low battery state is displayed by an LCD element, an LED element, or the like).

In addition, the battery supply company is notified of abnormal battery low conditions via a telephone line. When the time measurement means 18 detects a battery low state, the time measurement means 18 counts the time and measures the usable time of the gas shut-off device after the battery voltage drop. When the predetermined time is counted, the signal reception from the return means 14 is prohibited to the return prohibiting means 15 and a shutoff output is given to the shutting means 3. As a result, by stopping the gas supply thereafter, it is notified that the safe useable time of the gas shut-off device has elapsed. In this state, reception of a return signal for returning from the shut-off state from the return means 14 is prohibited, and the gas supply stop state is maintained. The customer and the gas supplier are notified via the notification means 16 that the gas cannot be supplied unless the gas shut-off device itself is replaced thereafter.

Here, when the voltage of the battery power supply means 2 is detected by the voltage detection means 10 in a weather environment such as a temporary abnormally low temperature, it may be erroneously determined that the voltage is low even though the battery capacity is sufficient. If an erroneous determination is made, the time measuring means 13 starts to be measured, or if it is left in the meantime and a predetermined time elapses, a shut-off signal is output to the shut-off means 3 and the battery voltage drop is cut off and the recovery is prohibited. Need to prevent. Without suddenly starting the operation of the time measurement means 13 by the voltage abnormality determination means 12, the voltage detection means 10 is driven again, and the battery voltage is checked again. Avoid misjudgment.

  In this way, when the battery power source of the gas shut-off device is erroneously detected as a predetermined value or less by the voltage detection means 15 due to environmental factors such as abnormally low temperature even though the battery capacity is sufficient, the battery voltage is confirmed again to prevent it. The gas company does not need to replace the gas shut-off device unnecessarily, and the number of unnecessary dispatches can be reduced, which greatly improves safety and usability.

(Embodiment 2)
FIG. 2 shows a gas cutoff device according to a second embodiment of the present invention. In FIG. 2, components having the same functions as those in FIGS. 1, 3, 4, 5, and 6 are assigned the same reference numerals and description thereof is omitted.

FIG. 2 shows a gas shut-off device according to a second embodiment of the present invention, wherein 12 voltage abnormality determination means are connected so that the outputs of the voltage detection means 10 and the battery capacity estimation means 11 are input, and the voltage detection means 10 Even if the battery voltage drop signal is detected, if the battery capacity estimation means 11 outputs a signal indicating that the battery capacity remains sufficiently, the voltage drop signal from the voltage detection means 10 is determined to be an erroneous signal. In addition, the voltage level of the battery power supply means 2 is determined to be normal, and a normal signal is output to the time measuring means 13, the return prohibiting means 15, and the notifying means 16 so as not to display a warning.

  Next, the operation of the above configuration will be described. A gas shut-off device is installed to monitor the use of gas appliances by gas consumers. When the battery power supply means 2 starts supplying power, the battery capacity estimation means 11 calculates the battery capacity consumption from the elapsed time and the average current of the control device 9.

  Since a large current flows when the interruption means 3 is activated halfway, it is added to the battery consumption for each operation. In this way, the amount of battery capacity consumed is always estimated. On the other hand, the voltage detection means 10 periodically monitors the voltage of the battery power supply means 2. When a voltage lower than the predetermined voltage is detected, a voltage drop signal is output to the voltage abnormality determination means 12. When the voltage is equal to or higher than the predetermined voltage value, a normal signal is output to the battery abnormality determination means 12. The voltage abnormality determination unit 12 determines whether or not the voltage drop is abnormal from the battery capacity consumption from the battery capacity estimation unit 11 and the voltage signal from the voltage detection unit 10.

When the winter cold wave strikes and becomes an abnormally low temperature state, the voltage detection means 1 may detect a temporary voltage drop level of the battery power supply means 2. When a voltage drop signal is output from the voltage detection means 10, the battery abnormality determination means 12 determines whether or not the battery capacity of the battery capacity estimation means 11 is consumed over a predetermined value. That is, a signal for driving the voltage detecting means 10 again is output. The voltage detection means 10 rechecks the battery voltage when the redrive signal is input. In the case of several years after installation, that is, when the battery consumption is still small, as a result, when a normal voltage is detected, that is, when a voltage value equal to or higher than a predetermined value is detected, a normal signal is output to the voltage abnormality determination means 12. In this case, the voltage drop signal from the first voltage detection means 10 is determined to be an erroneous signal, and the battery power supply means 2 does not determine an abnormal voltage due to an erroneous determination signal due to a decrease caused by transient abnormal weather or the like. Therefore, the time measuring means 13 maintains the stopped state as it is.

  On the other hand, the battery consumption capacity is less than the number of times of operation of the shut-off means 3 (total number of shut-offs and restorations) and the elapsed time for some reason, and the voltage may drop due to inundation such as rainwater. May be detected and output to the voltage abnormality determination means 12, and the voltage detection means 10 may be driven again to output the voltage reduction signal again even if the battery voltage is confirmed. As described above, in the second case, the voltage abnormality determination unit 12 determines that the voltage is in a low state, outputs a voltage decrease state signal to the time measurement unit 13, and starts time measurement. The return prohibiting means 15 is also notified. Further, a warning display of a low battery voltage state is displayed on the notification means 16 (the low battery state is displayed by an LCD element, an LED element, or the like).

In addition, the battery supply company is notified of abnormal battery low conditions via a telephone line. When the time measurement means 18 detects a battery low state, the time measurement means 18 counts the time and measures the usable time of the gas shut-off device after the battery voltage drop. When the predetermined time is counted, the signal reception from the return means 14 is prohibited to the return prohibiting means 15 and a shutoff output is given to the shutting means 3. As a result, by stopping the gas supply thereafter, it is notified that the safe useable time of the gas shut-off device has elapsed. In this state, reception of a return signal for returning from the shut-off state from the return means 14 is prohibited, and the gas supply stop state is maintained. The customer and the gas supplier are notified via the notification means 16 that the gas cannot be supplied unless the gas shut-off device itself is replaced thereafter.

Here, when the voltage of the battery power supply means 2 is detected by the voltage detection means 10 in a weather environment such as a temporary abnormally low temperature, it may be erroneously determined that the voltage is low even though the battery capacity is sufficient. If an erroneous determination is made, the time measuring means 13 starts to be measured, or if it is left in the meantime and a predetermined time elapses, a shut-off signal is output to the shut-off means 3 and the battery voltage drop is cut off and the recovery is prohibited. Need to prevent. Instead of suddenly starting the operation of the time measuring means 13 by the voltage abnormality determining means 12, the estimated value of the battery capacity from the battery capacity estimating means 11 is confirmed to determine that the voltage drop signal is an erroneous signal, and the voltage drop Avoid misjudging as abnormal.

  Even if the battery power supply of the gas shut-off device is erroneously detected by the voltage detection means 15 as a predetermined value or less due to environmental factors such as abnormally low temperature even though the battery capacity is sufficient in this way, the remaining capacity of the battery power supply means 2 at all times, that is, Since it is determined whether or not there is an error signal based on the past consumption, the gas company does not waste the capacity of the battery power supply means 2 as much as possible, and the gas company does not need to replace the gas shut-off device unnecessarily, and reduces the number of unnecessary dispatches. Can improve safety and usability.

(Embodiment 3)
FIG. 3 shows a gas cutoff device according to a third embodiment of the present invention. 3, components having the same functions as those in FIGS. 1, 2, 4, 5, and 6 are assigned the same reference numerals, and descriptions thereof are omitted.

  FIG. 3 shows a gas shut-off device according to a third embodiment of the present invention. Reference numeral 17 denotes a flow rate detecting means for measuring the amount of gas used by a gas appliance at a gas consumer. Reference numeral 18 denotes an external device means for outputting a gas leak detection signal detected by a gas leak alarm device, a determination signal as to whether the pressure is reduced by a pressure sensor, or a signal at the time of earthquake detection by a seismic sensor or the like. Collectively referred to as external equipment.

  19 is an abnormality determining means for determining whether the gas flow rate detected by the flow rate detecting means 17 is an abnormal flow rate, or for determining whether an abnormal gas leak, a gas pressure drop or an abnormal earthquake is detected by the external device means 18. To do. As a result, when an abnormal use of the gas appliance (determined by the flow rate or the like) or an abnormality by an external device is detected, a drive signal for the shut-off means 3 is output to stop the gas supply to the shut-off means 3.

  Next, the operation of the above configuration will be described. A gas shut-off device is installed to monitor the use of gas appliances by gas consumers. When the battery power supply means 2 starts supplying power, the battery capacity estimation means 11 calculates the battery capacity consumption from the elapsed time and the average current of the control device 9.

  Since a large current flows when the interruption means 3 is activated halfway, it is added to the consumption for each operation.

  In this way, the amount of battery capacity consumed is estimated. On the other hand, the voltage detection means 10 periodically monitors the voltage of the battery power supply means 2. When the voltage is lower than the predetermined voltage, a voltage drop signal is output to the voltage abnormality determination means 12. When the voltage is equal to or higher than the predetermined voltage value, a normal signal is output to the battery abnormality determination means 12. The voltage abnormality determination unit 12 determines whether or not the voltage drop is abnormal from the battery capacity consumption from the battery capacity estimation unit 11 and the voltage signal from the voltage detection unit 10.

  The voltage detection means 10 may detect a voltage drop state under abnormal weather such as a cold wave in winter. When a voltage drop signal is output from the voltage detection means 10, the battery abnormality determination means 12 determines whether or not the battery capacity of the battery capacity estimation means 11 is consumed over a predetermined value.

  In the case of several years after installation, that is, when the battery consumption is small, a signal for driving the voltage detecting means 10 is output again. The voltage detection means 10 checks the battery voltage when the re-drive signal is input. As a result, when a normal voltage is detected, that is, when a voltage value equal to or higher than a predetermined value is detected, a normal signal is output to the voltage abnormality determination means 12. In this case, the voltage drop signal from the first voltage detection means 10 is determined to be an erroneous signal, and is not determined to be a voltage abnormality by an erroneous determination signal associated with transient abnormal weather. The time measuring means 13 maintains the stopped state as it is.

  On the other hand, the battery consumption capacity is less than the number of times of operation of the shut-off means 3 (total number of shut-offs and restorations) and the elapsed time for some reason, and the voltage may drop due to inundation such as rainwater. May be detected and output to the voltage abnormality determination means 12, and the voltage detection means 10 may be driven again to output the voltage reduction signal again even if the battery voltage is confirmed. As described above, when the voltage is decreased for the second time, the voltage abnormality determination unit 12 determines that the voltage is in a low state, outputs a voltage decrease state signal to the time measurement unit 13, and starts time measurement. In such a case, when an abnormal battery consumption state occurs, it is safer to stop the gas supply and replace the gas shutoff device at an early stage. Since the voltage drop state was detected again by the voltage check, if the gas customer repeatedly uses the gas appliance abnormally, for example, if the gas appliance such as the stove is used abnormally for a long time, If the shut-off means 3 is driven many times, the current consumption is larger than usual, but if it is used repeatedly, the battery consumption is accelerated and the worst case is not expected. Therefore, when the flow rate detection means 17 monitors the usage state of the gas appliance, detects an abnormal gas flow rate, and determines that the abnormality determination means 19 has reached an abnormal level, it outputs a cutoff signal to the cutoff means 3 and returns. The prohibition means 15 is also notified. Thereafter, the return signal from the return means 14 is not accepted and the gas appliance cannot be used. In this way, the gas company is notified by early abnormality detection.

The notification means 16 displays a warning indicating that the battery voltage is low (displays the low battery state using an LCD element, an LED element, or the like). In addition, the battery supply company is notified of abnormal battery low conditions via a telephone line. Here, if the abnormality determination unit 19 fails to detect an abnormality, the time measuring unit 18 counts the time when a battery low state is detected, and measures the usable time of the gas cutoff device after the battery voltage drop. When the predetermined time is counted, the signal reception from the return means 14 is prohibited to the return prohibiting means 15 and a shutoff output is given to the shutting means 3. As a result, by stopping the gas supply thereafter, it is notified that the safe useable time of the gas shut-off device has elapsed. In this state, reception of a return signal for returning from the shut-off state from the return means 14 is prohibited, and the gas supply stop state is maintained. The customer and the gas supplier are notified via the notification means 16 that the gas cannot be supplied unless the gas shut-off device itself is replaced thereafter.

Thus, if the voltage of the battery power supply means 2 is detected by the voltage detection means 10 in a weather environment such as a temporary abnormally low temperature, it may be erroneously determined that the voltage is low even though the battery capacity is sufficient. If an erroneous determination is made, the time measuring means 13 starts to be measured, or if it is left in the meantime and a predetermined time elapses, a shut-off signal is output to the shut-off means 3 and the battery voltage drop is cut off and the recovery is prohibited. Need to prevent. Without suddenly starting the operation of the time measurement means 13 by the voltage abnormality determination means 12, the voltage detection means 10 is driven again, and the battery voltage is checked again. Avoid misjudgment. However, if the battery power supply of the gas shut-off device is detected below the predetermined value by the voltage detection means 15 by checking again, the gas shut-off method is provided at an early stage. Safety and usability are greatly improved without being impossible.

(Embodiment 4)
FIG. 4 shows a gas shut-off device according to a fourth embodiment of the present invention. 4, constituent elements having the same functions as those in FIGS. 1, 2, 3, 5, and 6 are assigned the same reference numerals, and descriptions thereof are omitted.

  FIG. 4 shows a gas shut-off device according to a fourth embodiment of the present invention. Reference numeral 20 denotes a time delay means, which is connected so that outputs from the voltage detection means 10 and the battery capacity estimation means 11 are input to the voltage abnormality determination means 12. When the battery capacity estimation means 11 outputs a signal indicating that the battery capacity remains sufficiently, and the voltage detection means 10 detects a battery voltage drop signal, the voltage level of the battery power supply means 2 is confirmed again. For this purpose, a signal for driving the voltage detecting means 10 is output. At this time, the voltage detecting means 10 is driven with a predetermined time delay, and the voltage of the battery power supply means 2 is confirmed.

  Next, the operation of the above configuration will be described. A gas shut-off device is installed to monitor the use of gas appliances by gas consumers. When the battery power supply means 2 starts supplying power, the battery capacity estimation means 11 calculates the battery capacity consumption from the elapsed time and the average current of the control device 9.

  Since a large current flows when the interruption means 3 is activated halfway, the battery capacity consumption is calculated from the number of interruptions and the number of return of the interruption means 3 and the consumption current of the interruption means, and is calculated as the current consumption for each operation. In this way, the amount of battery capacity consumed is estimated. On the other hand, the voltage detection means 10 periodically monitors the voltage of the battery power supply means 2. When the voltage is lower than the predetermined voltage, a voltage drop signal is output to the voltage abnormality determination means 12. When the voltage is equal to or higher than the predetermined voltage value, a normal signal is output to the battery abnormality determination means 12. The voltage abnormality determination unit 12 determines whether or not the voltage drop is abnormal from the battery capacity consumption from the battery capacity estimation unit 11 and the voltage signal from the voltage detection unit 10.

  The voltage detection means 10 may detect a voltage drop state under abnormal weather such as a cold wave in winter. When a voltage drop signal is output from the voltage detection means 10, the battery abnormality determination means 12 determines whether or not the battery capacity of the battery capacity estimation means 11 is consumed over a predetermined value.

  In the case of several years after installation, that is, when the battery consumption is small, a signal for driving the voltage detection means 10 again is output to the time delay means 20. The time delay means 20 outputs a drive signal to the voltage detection means 10 with a certain time delay. The voltage detection means 10 is driven to check by changing the time period for checking the voltage. The time zone in which the temperature is likely to be abnormally low is dawn, the usage frequency of the gas appliance is extremely low, and the driving capability of the shut-off means 3 of the battery power source means 2 is evaluated in the time zone in which the gas appliance is most frequently used. There is a need. Therefore, the voltage detection means 10 after a predetermined time delay checks the battery voltage when the re-drive signal is input. As a result, when a normal voltage is detected, that is, when a voltage value equal to or higher than a predetermined value is detected, a normal signal is output to the voltage abnormality determination means 12. In this case, the voltage drop signal from the first voltage detection means 10 is determined to be an erroneous signal, and is not determined to be a voltage abnormality by an erroneous determination signal associated with transient abnormal weather. The time measuring means 13 maintains the stopped state as it is.

  On the other hand, the battery consumption capacity is less than the number of times of operation of the shut-off means 3 (total number of shut-offs and restorations) and the elapsed time for some reason, and the voltage may drop due to inundation such as rainwater. May be detected and output to the voltage abnormality determination means 12, and the voltage detection means 10 may be driven again to output the voltage reduction signal again even if the battery voltage is confirmed. As described above, in the second case, the voltage abnormality determination unit 12 determines that the voltage is in a low state, outputs a voltage decrease state signal to the time measurement unit 13, and starts time measurement. The return prohibiting means 15 is also notified. Further, a warning display of a low battery voltage state is displayed on the notification means 16 (the low battery state is displayed by an LCD element, an LED element, or the like).

In addition, the battery supply company is notified of abnormal battery low conditions via a telephone line. When the time measurement means 18 detects a battery low state, the time measurement means 18 counts the time and measures the usable time of the gas shut-off device after the battery voltage drop. When the predetermined time is counted, the signal reception from the return means 14 is prohibited to the return prohibiting means 15 and a shutoff output is given to the shutting means 3. As a result, by stopping the gas supply thereafter, it is notified that the safe useable time of the gas shut-off device has elapsed. In this state, reception of a return signal for returning from the shut-off state from the return means 14 is prohibited, and the gas supply stop state is maintained. The customer and the gas supplier are notified via the notification means 16 that the gas cannot be supplied unless the gas shut-off device itself is replaced thereafter.

Thus, if the voltage of the battery power supply means 2 is detected by the voltage detection means 10 in a weather environment such as a temporary abnormally low temperature, it may be erroneously determined that the voltage is low even though the battery capacity is sufficient. If an erroneous determination is made, the time measuring means 13 starts to be measured, or if it is left in the meantime and a predetermined time elapses, a shut-off signal is output to the shut-off means 3 and the battery voltage drop is cut off and the recovery is prohibited. Need to prevent. Therefore, even if a voltage drop signal is input from the voltage detection unit 10 without suddenly starting the operation of the time measurement unit 13 by the voltage abnormality determination unit 12 this time, the time detection unit 10 drives the voltage detection unit 10 again after a certain period of time. When the battery voltage is sufficient, the battery power supply means 2 can be seen in the time zone in which the original gas appliance is often used by checking the battery voltage again, and even in the winter when the temperature is relatively high. Although the normal voltage value is detected, the first drop signal is determined to be an erroneous signal and is prevented from being erroneously determined to be a voltage drop abnormality, so the gas company does not need to replace the gas shutoff device unnecessarily, and the number of unnecessary dispatches Can be reduced, and safety and usability are greatly improved.

(Embodiment 5)
FIG. 5 shows a gas cutoff device according to a fifth embodiment of the present invention. 5, components having the same functions as those in FIG. 1, FIG. 2, FIG. 3, FIG. 4 and FIG.

  FIG. 5 shows a gas shut-off device according to a fifth embodiment of the present invention. Reference numeral 21 denotes a delay time variable means so that the outputs of the voltage detection means 10 and the battery capacity estimation means 11 are input to the voltage abnormality determination means 12. When the voltage detection means 10 detects a battery voltage drop signal when the battery capacity estimation means 11 outputs a signal indicating that the battery capacity remains sufficiently, and the voltage detection means 10 detects a battery voltage drop signal, the voltage level of the battery power supply means 2 again. For confirmation, a signal for re-driving the voltage detection means 10 is output, and the voltage detection means 10 is driven by varying the delay time at this time. The case where the battery capacity is sufficient and the voltage detection means 10 detects a drop signal is likely to occur over a long period of winter, but the time period until the voltage detection means 10 is driven again is shifted each time, that is, Check the voltage by changing the delay time.

  Next, the operation of the above configuration will be described. A gas shut-off device is installed to monitor the use of gas appliances by gas consumers. When the battery power supply means 2 starts supplying power, the battery capacity estimation means 11 calculates the battery capacity consumption from the elapsed time and the average current of the control device 9.

  Since a large current flows when the interruption means 3 is activated halfway, the battery capacity consumption is calculated from the number of interruptions and the number of return of the interruption means 3 and the consumption current of the interruption means, and is calculated as the current consumption for each operation. In this way, the amount of battery capacity consumed is estimated. On the other hand, the voltage detection means 10 periodically monitors the voltage of the battery power supply means 2. When the voltage is lower than the predetermined voltage, a voltage drop signal is output to the voltage abnormality determination means 12. When the voltage is equal to or higher than the predetermined voltage value, a normal signal is output to the battery abnormality determination means 12. The voltage abnormality determination unit 12 determines whether or not the voltage drop is abnormal from the battery capacity consumption from the battery capacity estimation unit 11 and the voltage signal from the voltage detection unit 10.

  The voltage detection means 10 may detect a voltage drop state under abnormal weather such as a cold wave in winter. Also, since the cold wave hits many times in winter and the abnormally low temperature repeatedly occurs, the above may occur repeatedly. Whenever a voltage drop signal is output from the voltage detection means 10, the battery abnormality determination means 12 determines whether the battery capacity of the battery capacity estimation means 11 is consumed over a predetermined value. When only a few years have passed since the gas shut-off device was installed, the battery consumption is usually small, but a signal for driving again to the voltage detecting means 10 is outputted to the delay time varying means 21. The delay time varying means 21 outputs a drive signal to the voltage detecting means 10 by varying the delay time every fixed time, for example, every time a signal for driving the voltage detecting means 10 is generated again. The driving capability is checked by changing the time zone for driving the voltage detecting means 10 and checking the voltage. The time zone in which the temperature is likely to be abnormally low is dawn, and the frequency of use of the gas appliance is extremely low. However, the drive capability of the shut-off means 3 of the battery power source means 2 in the time zone in which the gas appliance is most frequently used is the time. It is necessary to evaluate on average by changing the belt. Therefore, the voltage detection means 10 after a predetermined time delay checks the battery voltage when the re-drive signal is input. As a result, when a normal voltage is detected, that is, when a voltage value equal to or higher than a predetermined value is detected, a normal signal is output to the voltage abnormality determination means 12. In this case, the voltage drop signal from the first voltage detection means 10 is determined to be an erroneous signal, and is not determined to be a voltage abnormality by an erroneous determination signal associated with transient abnormal weather. The time measuring means 13 maintains the stopped state as it is.

  On the other hand, the battery consumption capacity is less than the number of times of operation of the shut-off means 3 (total number of shut-offs and restorations) and the elapsed time for some reason, and the voltage may drop due to inundation such as rainwater. May be detected and output to the voltage abnormality determination means 12, and the voltage detection means 10 may be driven again to output the voltage reduction signal again even if the battery voltage is confirmed. As described above, in the second case, the voltage abnormality determination unit 12 determines that the voltage is in a low state, outputs a voltage decrease state signal to the time measurement unit 13, and starts time measurement. The return prohibiting means 15 is also notified. Further, a warning display of a low battery voltage state is displayed on the notification means 16 (the low battery state is displayed by an LCD element, an LED element, or the like).

In addition, the battery supply company is notified of abnormal battery low conditions via a telephone line. When the time measurement means 18 detects a battery low state, the time measurement means 18 counts the time and measures the usable time of the gas shut-off device after the battery voltage drop. When the predetermined time is counted, the signal reception from the return means 14 is prohibited to the return prohibiting means 15 and a shutoff output is given to the shutting means 3. As a result, by stopping the gas supply thereafter, it is notified that the safe useable time of the gas shut-off device has elapsed. In this state, reception of a return signal for returning from the shut-off state from the return means 14 is prohibited, and the gas supply stop state is maintained. The customer and the gas supplier are notified via the notification means 16 that the gas cannot be supplied unless the gas shut-off device itself is replaced thereafter.

As described above, when the voltage of the battery power supply means 2 is detected by the voltage detection means 10 in a weather environment such as a temporary abnormally low temperature, the case where the battery capacity is sufficient and the voltage drop is erroneously determined repeatedly occurs. It's easy to do. If an erroneous determination is made, the time measuring means 13 starts to be measured, or if it is left in the meantime and a predetermined time elapses, a shut-off signal is output to the shut-off means 3 and the battery voltage drop is cut off and the recovery is prohibited. Need to prevent. Therefore, even if the voltage abnormality determination means 12 does not suddenly start the time measurement means 13 this time, and even if a decrease signal is input from the repetitive voltage detection means 10, the delay time variable means 21 changes the delay time each time. When the voltage detection means 10 is driven again and the battery voltage is checked again, the average drive capability of the battery power supply means 2 in the time zone in which the original gas appliance is often used is known, and the battery capacity is sufficient. Although the normal voltage value is detected, the first drop signal is determined to be an erroneous signal and is prevented from being erroneously determined to be a voltage drop abnormality, so the gas company does not need to replace the gas shutoff device unnecessarily, and the number of unnecessary dispatches Can be reduced, and safety and usability are greatly improved.

Control block diagram of the gas cutoff device of the first embodiment of the present invention Control block diagram of the gas shut-off device of the second embodiment of the present invention Control block diagram of gas shutoff device of third embodiment of the present invention Control block diagram of gas shutoff device of fourth embodiment of the present invention Control block diagram of gas cutoff device of fifth embodiment of the present invention Control block diagram of a conventional gas shut-off device

2 battery power supply means 3 shut-off means 10 voltage detection means 11 battery capacity estimation means 12 battery abnormality determination means 13 time measurement means 14 return means 15 return prohibition means 16 notification means 17 flow rate detection means 18 external device means 19 abnormality determination means 20 time delay Means 21 Delay time variable means

Claims (4)

Battery power supply means for supplying power, shutoff means for supplying and shutting off the gas medium, voltage detection means for periodically monitoring the supply voltage of the battery power supply means and detecting the battery voltage, and the number of times the shutoff means is driven Battery capacity estimating means for estimating the battery consumption from the elapsed time from the start of power supply, and when the battery consumption estimated by the battery capacity estimating means is within a predetermined consumption , the voltage detection means When a signal is output , the voltage detection unit is driven again, and when a low voltage is detected, the voltage abnormality determination unit determines that the voltage is low, and the voltage abnormality determination unit measures the time when the voltage drop state is detected. A time measuring means for outputting a shut-off to the shut-off means after a lapse of a predetermined time, a return means for outputting a signal for returning the shut-off means to a gas supply enabled state, and the time measuring means. Gas cutoff apparatus that includes a return inhibition unit to input disable a return signal from the return means when the elapsed time. The flow rate detection means for measuring the gas supply amount, the external device means for detecting an abnormal state such as a gas leak or an earthquake, and the use of an abnormal gas appliance is determined from the signal from the flow rate detection means or the external device means An abnormality determining means for outputting a cut-off signal at the time of determining abnormal use, an abnormal flow rate being detected by the flow rate detecting means during the time measurement by the time measuring means, or an abnormal gas leak or an earthquake exceeding a predetermined level by the external device means. 2. The gas shutoff device according to claim 1, further comprising a return prohibiting means for outputting a shutoff signal to the shutting means and detecting that a return signal from the return means is prohibited from being input and maintaining the shutoff state of the shutoff means when detected. The voltage abnormality determination means drives the voltage detection means again after a predetermined time delay when the battery consumption estimated by the battery capacity estimation means is within a predetermined consumption and a signal equal to or lower than a predetermined voltage is output from the voltage detection means. The gas cutoff device according to claim 1, wherein when a voltage equal to or lower than a predetermined voltage is detected, it is determined that the battery voltage is low. The gas cutoff device according to claim 3, wherein the predetermined time is variable.