JP4195995B2 - 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.

  This type of conventional gas cutoff device has a configuration as shown in the block diagram of FIG. 5 (see, for example, Patent Document 1).

  In the gas shut-off device 1 shown in FIG. 5, reference numeral 2 denotes a battery power supply means for supplying power to the entire gas shut-off device. Reference numeral 3 denotes a blocking means, which stops or supplies gas in the flow path. Reference numeral 4 denotes a voltage drop detection unit, which detects a battery voltage in a depleted 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. . Reference numeral 5 denotes an opening acceptance unit that accepts opening of the shut-off means 3 from when the voltage drop signal A is input, and when there is an opening request (opening request switch or input of an opening signal by communication). An opening request signal C is output. A timer unit 6 counts a predetermined operation guarantee time from 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. 8 is a gas shut-off control unit, which shuts off the shut-off means 3 when the voltage drop signal A or the capping stop signal E is input, and shuts off when the capping request signal C is input before the input signal of the capping stop signal E. The means 3 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 to operate the cutoff means 3 and close 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 means 3. When the timer section 6 finishes counting, the plug opening end signal D is output, so the plug opening function stop section 7 outputs the plug opening stop signal E and stops accepting the plug opening request. The gas shut-off device 1 to which the closing stop signal E is inputted outputs the second shut-off command signal B2 to close the shut-off means 3.

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. ing. 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, after the battery consumption voltage is detected for the required number of days, the shut-off means 3 can be opened only during the period when the voltage of the battery power supply means 2 drops to the operation guarantee voltage, and a grace period is provided until the gas shut-off device 1 is replaced. It is a thing.
Japanese Patent Laid-Open No. 10-103546

  However, the conventional configuration has the following problems. The voltage drop detection unit 4 detects the battery voltage in a predetermined consumption state, outputs a voltage drop signal A, the timer unit 6 starts counting, and the shut-off signal is cut off from the gas cutoff control unit 8 when the timer unit 6 elapses for a predetermined time. Although it is output to the means 3, it is not disclosed how to drive the voltage drop detection unit 4 to detect the battery voltage, and it is erroneously determined in a very low temperature environment in winter, for example, although the battery capacity is sufficient. Had problems.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object of the present invention is to provide a safe and reliable gas cutoff device that can monitor battery voltage without erroneous determination.

  In order to solve the above-mentioned conventional problems, the present invention provides a battery power supply means for supplying power, a shutoff means for supplying and shutting off a gas medium, a return means for outputting a signal for returning to a supplyable state, and a battery power supply means. Voltage detecting means for monitoring the supply voltage of the power supply and determining that an abnormality is detected when the voltage is equal to or lower than a predetermined voltage; a period setting means for setting a period for driving the voltage detecting means; a period variable means for changing the period of the period setting means; The period of the period setting means is changed by the variable means, and the supply voltage is monitored and judged by the voltage detection means.

  As a result, the voltage detection means constantly changes the drive cycle by the period variable means, and does not always perform voltage determination in a fixed time zone, but checks the supply voltage capability of the battery power supply in various time zones. In some cases, the battery voltage was checked at extremely low temperatures due to a cold wave. In that case, the cycle variable means was changed to check the battery voltage at a different time zone instead of the interval set by the conventional cycle setting means. By setting the cycle to the cycle setting means and monitoring the voltage, it is possible to prevent the battery from being mistakenly judged to be low due to the coldest temporary cryogenic temperature in the winter, and the gas cannot be used after a predetermined time as a result of the misjudgment. There is no problem and the safety and reliability of the gas shutoff device can be improved.

  According to the gas shut-off device of the present invention, when the voltage detection means detects a predetermined value or less, it is not immediately determined as abnormal, but the voltage detection means is driven in a time zone in which the set time of the cycle setting means is changed. Set the time zone to a period that changes to a time zone that is different from the time zone in which the previous voltage drop was detected, drive the voltage detection means, and if the voltage value can be judged to be normal as a result, it is judged as a misjudgment. Even if the battery capacity still remains due to a temporary drop in temperature due to the intrusion, etc., it is possible to prevent a voltage drop and misjudgment. Can be prevented from stopping and gas cannot be used.

  The first aspect of the present invention is a battery power supply means for supplying power, a shutoff means for supplying or shutting off a gas medium, and a voltage detection for judging that an abnormality is detected when a supply voltage of the battery power supply means is monitored and a predetermined voltage or less is detected. A period setting means for setting a period for driving the voltage detection means, a period variable means for changing the period of the period setting means, and a predetermined time when the voltage detection means detects a predetermined number of times or more. Time measurement means for starting measurement, 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 and prohibiting input to the shut-off means It comprises return prohibiting means for performing a shutoff output.

  Then, the period changing means outputs an output for changing the monitoring period to the period setting means, and temporarily detects that the supply voltage of the battery power source is equal to or lower than a predetermined voltage by the voltage detection means driven intermittently by the period setting means. Even so, the period variable means changes the period of the period setting means to drive the voltage detection means to check the supply voltage so as to change the voltage detection time zone, and the battery voltage is normal by changing the time zone. If the previous battery voltage drop detection is determined to be an erroneous determination due to the environmental temperature, etc., and even if the battery voltage is detected by changing the time zone, it is determined that the battery drop is abnormal and the time measurement means measures the time. Start and notify the notification means of abnormal indication, and the time measuring means drives the shut-off means after counting, so it is misjudged that the battery is low due to abnormal weather such as transient cold waves Failure to enhance the usability and reliability of the gas cutoff apparatus without such that blocked.

  According to a second aspect of the present invention, there is provided a battery power supply means for supplying power, a shutoff means for supplying and shutting off the gas medium, and a voltage detection means for monitoring whether or not the supply voltage of the battery power supply means is below a predetermined voltage. An alternate number counting means for counting the number of times that the voltage detecting means alternately detects a voltage lower than or equal to a predetermined voltage, a period setting means for setting a period for driving the voltage detecting means, and a period setting means A period varying means for varying the period, a time measuring means for starting measurement of a predetermined time when the predetermined number of times is detected by the alternate number counting means, and a return means for outputting a signal for returning the shutoff 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 and for performing a shutoff output to the shutting means.

  Although the battery power consumption increases with the passage of time since the installation of the gas shut-off device, the period variable means outputs an output for changing the monitoring period to the period setting means, and voltage detection driven intermittently by the period setting means Even if the supply voltage of the battery power supply is detected below a predetermined voltage by the means, the normality of the supply voltage may be detected by driving the voltage detection means by changing the period of the period setting means by the period variable means. This state is detected and counted by the time counting means, and when the predetermined number of times is reached, the time measuring means starts to measure, so that the battery capacity consumption is progressing, but the battery voltage drop cannot be detected continuously. The driving ability is not lost, the abnormality notification is notified to the notification means, and the blocking means is driven after counting by the time measurement means. Therefore, there is no problem that the detection of abnormal battery voltage supply is delayed without repeating the normal / abnormality without erroneously judging that the battery is low due to abnormal weather such as transient cold waves. It improves the usability and reliability of the gas shutoff device.

  According to a third aspect of the present invention, there is provided a battery power supply means for supplying power, a shutoff means for supplying and shutting off the gas medium, a voltage detection means for monitoring whether or not the supply voltage of the battery power supply means is below a predetermined voltage, and , An alternating number counting means for measuring the number of times the voltage detecting means alternately detects a voltage lower than or equal to a predetermined voltage or a predetermined voltage, a period setting means for setting a period for driving the voltage detecting means, and a cycle of the period setting means A period varying means for varying the time, an installation time measuring means for measuring the installation time of the gas shut-off device, a time measuring means for starting the measurement of a predetermined time when the predetermined number of times is detected by the alternating frequency counting means, and the shut-off means A return means for outputting a signal for returning 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 and making a shut-off output to the shut-off means Consisting of.

  Then, the first cycle setting means for setting a long monitoring cycle and the second cycle setting means for setting a short cycle are alternated so that the capacity of the battery power supply means is retained as much as possible and the consumption state is accurately confirmed. Even if it is temporarily detected that the supply voltage of the battery power supply is below a predetermined voltage by the voltage detection means driven intermittently by the period setting means, The cycle setting means 2 changes the cycle so as to change the voltage detection time zone, and further changes the cycle of the cycle setting means to drive the voltage detection means to check the supply voltage. When the battery voltage is normal, it is determined that the previous battery voltage drop detection is an erroneous determination due to the environmental temperature, etc., and even if the battery voltage is detected by changing the time zone, it is determined that the battery drop is abnormal, and the time measurement means Time measurement The notification means notifies the abnormality display, and the time measurement means drives the shut-off means after counting, so that the battery is erroneously determined to be shut down due to abnormal weather such as a transient cold wave and shut off. There is no such trouble, and the usability and reliability of the gas shut-off device are improved.

  According to a fourth aspect of the present invention, there is provided a battery power supply means for supplying power, a shutoff means for supplying and shutting off the gas medium, and a voltage detection means for monitoring the supply voltage of the battery power supply means and detecting an abnormality when a predetermined voltage or less is detected. A period setting means for setting a period for driving the voltage detection means, a period variable means for changing the period of the period setting means when a voltage drop is detected by the voltage detection means, and a voltage drop by the voltage detection means. A time measuring means for measuring a predetermined time when detection is performed a predetermined number of times or more; 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 And a return prohibiting means for performing a shutoff output to the shutting means.

  When detecting that the supply voltage of the battery power source is not more than the predetermined voltage by the voltage detection means that is intermittently driven by the period setting means, the period variable means is configured to change the voltage detection time zone. The voltage detection means is driven by changing the period of the battery and the battery voltage is checked, but if the battery voltage is normal by changing the time zone, the previous battery voltage drop detection is determined to be an erroneous determination due to the environmental temperature, etc. Even if the battery voltage is detected by changing the band, when the battery drop is detected, it is determined that the battery is low, and time measurement is started by the time measurement means. Since the device is driven, there is no problem of erroneously judging that the battery is low due to abnormal weather such as a transient cold wave, and there is no malfunction such as blocking and the usability of the gas shut-off device To enhance the dependability.

  5th invention is a program for making a computer perform all or one part of the means of the gas interruption | blocking apparatus of any one invention of 1st-4th.

  And since it is a program, a part or all of the gas interruption | blocking apparatus of this invention can be easily implement | achieved using a microcomputer etc. Also, program distribution and installation can be simplified by recording on a recording medium or distributing a program using a communication line.

  Hereinafter, embodiments of the present invention will be described with reference to FIG. 1, FIG. 2, FIG. 3, and FIG. 1, 2, 3, and 4, the same reference numerals are given to components having the same functions as those in FIG. 5.

(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 for the gas shut-off device, and 10 is a flow rate detecting means for detecting the amount of gas used. The flow rate detection means 10 is, for example, a flow rate measurement method by measuring propagation time using an ultrasonic element, a flow rate measurement method by measuring flow rate oscillation using the Coanda effect, or a membrane type. There is also a method of measuring the gas amount by the measuring unit. 11 is an external device means, for example, a gas leak alarm for detecting gas leaks, a seismic sensing means for detecting earthquakes, or a pressure detecting means for detecting gas pressures, detecting gas leaks and earthquakes. When a gas pressure drop is detected, a signal is output. Reference numeral 12 denotes an abnormality determination unit, which detects, for example, that one gas appliance has been used abnormally for a long time from the gas usage state detected by the flow rate detection unit 10, or detects a gas leak using the external device unit 11. When an earthquake is detected, it is determined whether the earthquake is greater than a predetermined intensity. Reference numeral 13 denotes a return means which, when operated, outputs a return signal from the shut-off means 3 in order to start supplying gas to the shut-off means 3. Reference numeral 14 denotes a return prohibiting means, which determines whether or not to output a return signal from the return means 13 to the blocking means 3, and outputs it if it is not in a return prohibiting state, thereby opening the blocking means 3. Reference numeral 15 denotes a period setting means for setting a time for monitoring the battery voltage and outputting a drive signal for battery voltage monitoring when a predetermined time elapses. Reference numeral 16 denotes voltage detection means. When a drive signal is received from the period setting means 15, the output voltage of the battery power supply means 2 is monitored, and it is determined whether or not the voltage has dropped below a predetermined value. Is output. Reference numeral 17 denotes a cycle variable means for outputting a set value obtained by varying the drive cycle of the voltage detection means 16 to the cycle setting means 15. For example, the battery voltage detection is first performed after 25 hours, and then set after 13 hours different from the first time zone. When the time is output to the period setting means 15 and the time has elapsed, the voltage detection means 16 is driven. The voltage detection means 16 is driven in different time zones to make a voltage determination. If the voltage value is determined to be normal, it is determined that the malfunction is caused by a temperature drop due to a temporary weather factor such as a cold wave. If it is determined again that the voltage has dropped, it is determined that the voltage has dropped due to battery consumption. Reference numeral 18 denotes time measuring means. When a voltage drop state is detected by the voltage detection means 16, counting of the usable time of the gas cutoff device after the battery voltage drop detection is started by the drop signal. That is, the elapsed time of 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. When the measurement of the usable time is completed by the time measuring means 18, that is, when a predetermined time has elapsed, the input of the return instruction signal from the return means 13 is prohibited to the return prohibiting means 14, and the shutoff signal is output to the shutting means 3 to stop the gas supply. The notification means 19 displays an abnormality indication for replacing the gas shutoff device.

  Further, a battery voltage drop signal is output to the time measuring means 18, and before the time measuring means 18 reaches a predetermined time, that is, when the abnormal use state of the gas appliance by the consumer is detected by the abnormality determining means 12 during the time measurement, the battery is cut off. When a cutoff signal is output to the means 3 and a cutoff notification signal for detecting an abnormal state is input to the return prohibiting means 14, the return prohibiting means 14 does not accept the return signal of the cutoff means 3 from the return means 13 and shuts off. Hold on.

  Next, the operation of the above configuration will be described. A gas shut-off device is installed, and the gas appliance usage state of the gas consumer is monitored by the flow rate detection means 10 and the external equipment means 11. When abnormal use is detected by the abnormality determination means 12 during the use, for example, when it is detected that the gas stove has been used for an abnormal long time, a cutoff signal is output to the cutoff means 3 and the gas supply is stopped. Under such a monitoring situation, when an abnormal cold wave in winter strikes, the battery power supply means 2 is exposed to a low temperature state, and a record abnormal low temperature continues, the voltage detection means 16 is turned on at the period set by the period setting means 15. Although it is driven and the voltage of the battery power supply means 2 is monitored, when it is measured at the lowest temperature around dawn, it may be temporarily detected that the battery is low even though the battery capacity remains sufficiently.

  In such a case, in order not to be affected by the determination of the battery voltage due to environmental factors, the period varying means 17 differs from the time zone in which the next voltage detection period is detected as a voltage drop, for example, after 12 to 13 hours. The time zone is set in the period setting means 15. That is, the voltage detection unit 16 is driven in a time zone different from the currently determined time zone according to the cycle of the cycle setting unit 15 to monitor the supply voltage. When a voltage drop due to an extremely low temperature due to abnormal weather is detected, the voltage detecting means 16 is driven by shifting the predetermined time by the period variable means 17 to measure the battery voltage. If the battery voltage is determined to be normal, an abnormal cryogenic temperature, etc. Judged as a misjudgment due to weather factors.

  Further, in the period of one month, the period variable means 17 sets the time for the period setting means 15 so that the drive time zone of the voltage detection means 16 covers the entire time zone of one day. On the other hand, when the battery voltage of the battery power supply means 2 is abnormally consumed for some reason and the battery voltage drops, the battery detection state is detected by the voltage detection means 16, and the voltage is measured by changing the measurement cycle by the cycle variable means 17. The voltage drop continues. When the voltage detection means 16 detects this state, it outputs a voltage drop signal, and inputs the drop state signal to the return prohibition means 14 and the time measurement means 18. At the same time, the notification means 19 displays the low battery state using an LCD element, LED element, or the like. In addition, the battery supply company is notified of abnormal battery low conditions via a telephone line. Further, the time measuring means 18 counts the time when the battery low signal state is detected, measures the usable time of the gas shut-off device after the battery voltage drops, and receives the signal from the return means 13 to the return prohibiting means 14 when the predetermined time is counted. And a blocking signal is output to the blocking 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.

  When the time measuring means 18 receives the battery low signal and the time measuring means 18 is counting the time, the flow rate detecting means 10 or the external device means 11 detects the use state of the gas appliance of the consumer, and when an abnormal state is detected, the time is reached at that time. The time count of the measuring means 18 is stopped and the gas use is prohibited. The customer and the gas supplier are notified through the notification means 19 that the gas cannot be supplied unless the gas shut-off device itself is replaced thereafter.

  In this way, when the battery power source of the gas shut-off device detects a predetermined value or less by the voltage detection means 16, it is not immediately determined to be abnormal. By monitoring the voltage of means 2 and judging the temporary voltage drop of the battery power supply due to the extremely low temperature caused by the abnormal cold wave in winter, distinguishing it from the permanent battery drop due to real battery capacity consumption, weather factors, etc. It is possible to prevent the gas supplier from using the gas appliance by shutting off after a predetermined time due to an erroneous determination due to or making the gas supplier unnecessarily dispatch.

(Embodiment 2)
FIG. 2 shows a gas cutoff device according to a second embodiment of the present invention.

  In FIG. 2, reference numeral 20 denotes an alternate number counting means, and the voltage detecting means 16 is driven with the period set in the period setting means 15 by the period varying means 17, and as a result, the voltage drop determination and the voltage normality determination occur alternately. Count the number of cases. When the predetermined number of times is reached, a battery low state signal is output to the time measuring means.

  Next, the operation of the above configuration will be described. A gas shut-off device is installed and a long time elapses. During this period, the flow rate detection means 10 and the external equipment means 11 monitor the gas appliance usage state of the gas consumer. When abnormal use is detected by the abnormality determination means 12 during the use, for example, when it is detected that the gas stove has been used for an abnormal long time, a cutoff signal is output to the cutoff means 3 and the gas supply is stopped. When the battery capacity consumption is considerably advanced, the voltage detection means 16 set by the period setting means 15 is driven and the voltage of the battery power supply means 2 is set in a situation where the temperature difference is large, such as at dawn in winter or during the daytime. Although it is monitored, if it is measured at the lowest temperature around dawn, it is measured that the battery voltage is low, and if the supply voltage level is checked again during the daytime period, it becomes a normal voltage, and abnormal or normal may be determined alternately.

  In such a case, in order not to be affected by the determination of the battery voltage due to environmental factors, the period varying means 17 differs from the time zone in which the next voltage detection period is detected as a voltage drop, for example, after 12 to 13 hours. The time zone is set in the period setting means 15. That is, the voltage detection means 16 is driven and the supply voltage is monitored by changing the period of the period setting means 15 in a time zone different from the currently determined time zone. The voltage detection means 16 determines the driving capability of the battery power supply means 2 at the cycle interval of the period setting means 15, but when the voltage drop is detected at dawn when the temperature tends to be low, the period variable means 17 shifts the predetermined time. When the battery voltage is measured and the battery voltage is determined to be normal, the alternate number counting means 20 counts when a decrease and a normal state are detected alternately. If it does not occur continuously, it is judged as a misjudgment due to weather factors such as abnormal cryogenic temperature and the number of times is reset.

  Further, in the period of one month, the period variable means 17 sets the time for the period setting means 15 so that the drive time zone of the voltage detection means 16 covers the entire time zone of one day. It is determined whether it is normal or abnormal in all time zones, and after installation of the gas shut-off device 1, when abnormal use is detected and the number of shut-off times increases and a predetermined time elapses, it is determined that the voltage drops in a certain time zone, and daytime The band repeats the opposite result alternately with normal voltage. If the reversal of the result by this measurement state is repeated over a long period of time, in order to prevent sudden loss of the driving capability of the interruption means 3 due to the deeper discharge depth of the battery, A battery low signal is output to the measuring means 18. The return prohibiting means 14 inputs the status signal. At the same time, the notification means 19 displays the low battery state using an LCD element, LED element, or the like. In addition, the battery supply company is notified of abnormal battery low conditions via a telephone line. Further, the time measuring means 18 counts the time when the battery low signal state is detected, measures the usable time of the gas shut-off device after the battery voltage drops, and receives the signal from the return means 13 to the return prohibiting means 14 when the predetermined time is counted. Is made in a prohibited state and a cutoff output is made to the cutoff means 3. As described above, the gas supply can be stopped thereafter to notify that the safe useable time of the gas shut-off device has elapsed.

  In addition, after receiving the battery low signal, during the time counting by the time measuring means 18, the use state of the gas appliance of the consumer is detected by the flow rate detecting means 10 or the external device means 11, and when an abnormal state is detected, at that time The time counting of the time measuring means 18 is stopped and the gas use is prohibited. Then, the customer and the gas supplier are notified through the notification means 19 that the gas cannot be supplied unless the gas shutoff device itself is replaced thereafter.

  In this way, when the battery power source of the gas shut-off device detects a value equal to or lower than the predetermined value by the voltage detection means 16, it is not immediately determined to be abnormal. The voltage of the means 2 is monitored, and the alternating number counting means 20 counts the alternating state of normal / abnormal judgment that occurs when the depth of discharge of the battery power supply means 2 has advanced considerably, and when the predetermined number of times is reached, it is determined that the battery is low. Therefore, it is judged by distinguishing the temporary voltage drop of the battery power source due to the extremely low temperature due to the abnormal cold wave in winter and the permanent battery drop due to the real battery capacity consumption. Therefore, it is possible to prevent gas customers from using gas appliances by blocking due to misjudgment due to weather factors, etc., and to prevent unnecessary mobilization of gas suppliers. Door can be.

(Embodiment 3)
FIG. 3 shows a gas cutoff device according to a third embodiment of the present invention.

  In FIG. 3, reference numeral 21 denotes an installation time counting means, which counts the time since the gas shut-off device 1 is installed, and when the predetermined time has elapsed, indicates that the usage time of the battery power supply means 2 has approached the end of use, to the alternate frequency counting means 20. The voltage detection means 16 is driven in the cycle set in the cycle setting means 15 and starts counting the number of times when the voltage drop determination and the voltage normality determination occur alternately.

  Next, the operation of the above configuration will be described. While the gas shut-off device is installed, the installation time counting means 21 starts counting time. A long time has passed after installation, and the gas appliance usage state of the gas consumer is monitored by the flow rate detection means 10 and the external equipment means 11 during that time. When abnormal use is detected by the abnormality determination means 12 during the use, for example, when it is detected that the gas stove has been used for an abnormal long time, a cutoff signal is output to the cutoff means 3 and the gas supply is stopped. Until the installation time elapses for a predetermined time under such security, for example, a temporary battery voltage drop may occur due to a cold wave in winter, but it is necessary to prevent erroneous determination due to environmental factors. Therefore, when the installation time counting means 21 has passed a predetermined time, the alternate number counting means 20 starts counting the number of times of state change such as battery low or normal. Since the battery capacity is consumed considerably after a predetermined time has elapsed, the voltage detection means 16 set by the period setting means 15 is driven to drive the battery power supply means 2 in a situation where there is a large temperature difference such as the dawn of winter or the daytime. When the voltage is monitored, if the temperature is measured at the lowest temperature around dawn, it is measured that the battery voltage is low, and if the supply voltage level is checked again during the daytime period, the voltage becomes normal, and abnormal or normal may be determined alternately.

  In such a case, in order not to be affected by the determination of the battery voltage due to environmental factors, the period varying means 17 differs from the time zone in which the next voltage detection period is detected as a voltage drop, for example, after 12 to 13 hours. The time zone is set in the period setting means 15. That is, the voltage detection means 16 is driven and the supply voltage is monitored by changing the period of the period setting means 15 in a time zone different from the currently determined time zone. The voltage detection means 16 determines the driving capability of the battery power supply means 2 at the cycle interval of the period setting means 15, but when the voltage drop is detected at dawn when the temperature tends to be low, the period variable means 17 shifts the predetermined time. When the voltage detection means 16 is driven to measure the battery voltage and the battery voltage is determined to be normal, the alternating time count means 20 counts when a decrease and normal state are detected alternately. If it does not occur continuously, it is judged as a misjudgment due to weather factors such as abnormal cryogenic temperature and the number of times is reset.

  Further, in the period of one month, the period variable means 17 sets the time for the period setting means 15 so that the drive time zone of the voltage detection means 16 covers the entire time zone of one day. It is determined whether it is normal or abnormal in all time zones, and after the installation of the gas shut-off device 1, abnormal use is detected. When the number of shut-offs increases and a predetermined time elapses, it is determined that the voltage drops in a certain time zone, and the daytime time zone Repeats the opposite result alternately with normal voltage. If the reversal of the result due to this measurement state is repeated over a long period of time, the discharge depth of the battery is deepened, and in order to prevent a sudden loss of driving capability of the shut-off means 3, the time count means once the alternate count posting means 20 reaches a certain number of times. 18 outputs a battery low signal. The return prohibiting means 14 inputs the status signal. At the same time, the notification means 19 displays the low battery state on the LCD element, LED element or the like. In addition, the battery supply company is notified of abnormal battery low conditions via a telephone line. Further, the time measuring means 18 counts the time when the battery low signal state is detected, measures the usable time of the gas shut-off device after the battery voltage drop, and receives the signal from the return means 13 to the return prohibiting means 14 when the predetermined time is counted. Is made in a prohibited state and a cutoff output is made to the cutoff 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 way, after the gas shut-off device 1 is installed, the installation time counting means 21 counts the elapsed time, and when the battery power source detects the predetermined value or less by the voltage detection means 16 until the predetermined time elapses, it is immediately determined as abnormal. Instead, after a predetermined time has elapsed, the voltage detection cycle by the cycle setting unit 15 is shifted from the cycle varying unit 17 to monitor the voltage of the battery power source unit 2, and the alternate number counting unit 20 is in an alternating state of normal / abnormal determination. Start counting. When it reaches the specified number of times, it is judged that the battery is low, so the erroneous determination due to the temperature change cycle of the day, and the temporary voltage drop of the battery power supply due to the extremely low temperature due to the abnormal cold wave in winter are permanent due to real battery capacity consumption. It is possible to prevent the gas supply company from using unnecessary gas appliances or making the gas supplier unnecessarily dispatched because it is determined by identifying it as a typical battery drop. .

(Embodiment 4)
FIG. 4 shows a gas shut-off device according to a fourth embodiment of the present invention.

  In FIG. 4, reference numeral 17 denotes a period variable means that changes the drive signal output time of the period setting means 15 when receiving a voltage drop signal from the voltage detection means 16. For example, a different time zone such as 12 hours after the time when the battery voltage drop is detected is set, output to the cycle setting means 15, and when that time has elapsed, the voltage detection means 16 is driven. The voltage detection means 16 is driven in different time zones to make a voltage determination. If the voltage value is determined to be normal, it is determined that the malfunction is caused by a temperature drop due to a temporary weather factor such as a cold wave, and the voltage drop is determined again. If so, it is determined that the voltage has dropped due to battery consumption. Reference numeral 18 denotes time measuring means. When a voltage drop state is detected by the voltage detection means 16, counting of the usable time of the gas cutoff device after the battery voltage drop detection is started by the drop signal. That is, the elapsed time of 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. When the measurement of the usable time is completed by the time measuring means 17, that is, when a predetermined time has elapsed, the return prohibiting means 14 is prohibited from inputting the return instruction signal from the returning means 13, and is shut off to the shutting means 3 and maintained in the gas supply stop state. Then, an abnormality display for replacing the gas shut-off device is displayed on the notification means 19.

  Further, a battery voltage drop signal is output to the time measuring means 18, and before the time measuring means 18 reaches a predetermined time, that is, when the abnormal use state of the gas appliance by the consumer is detected by the abnormality determining means 12 during the time measurement, the battery is cut off. When a cutoff signal is output to the means 3 and a cutoff notification signal for detecting an abnormal state is input to the return prohibiting means 14, the return prohibiting means 14 does not accept the return signal of the cutoff means 3 from the return means 13 and shuts off. Hold on.

  Next, the operation of the above configuration will be described. A gas shut-off device is installed, and the gas appliance usage state of the gas consumer is monitored by the flow rate detection means 10 and the external equipment means 11. When abnormal use is detected by the abnormality determination means 12 during the use, for example, when it is detected that the gas stove has been used for an abnormal long time, a cutoff signal is output to the cutoff means 3 and the gas supply is stopped. Under such a monitoring situation, when an abnormal cold wave in winter strikes, the battery power supply means 2 is exposed to a low temperature state, and a record abnormal low temperature continues, the voltage detection means 16 is turned on at the period set by the period setting means 15. Although it is driven and the voltage of the battery power supply means 2 is monitored, when it is measured at the lowest temperature around dawn, it may be temporarily detected that the battery is low, even though the battery capacity remains sufficiently. In such a case, when the voltage drop signal is input, the cycle variable means 17 sets a time zone different from the time zone in which the next voltage detection cycle is detected as a voltage drop, for example, 12 hours later, in the cycle setting means 15. That is, the voltage detection unit 16 is driven with a shift from the set time zone of the current cycle setting unit 15 to monitor the voltage. Voltage drop due to extremely low temperature due to abnormal weather is shifted by a predetermined time by the detection time variable means 17 to drive the voltage detection means 16 to measure the battery voltage. If the battery voltage is determined to be normal, the weather such as abnormal cryogenic temperature is detected. The erroneous determination due to the cause is determined, the measurement start state of the time measuring means 18 is reset, and the voltage is monitored with the initial cycle setting value. On the other hand, if the battery voltage of the battery power supply means 2 is abnormally consumed for some reason and the battery voltage decreases, and the battery detection state is detected by the voltage detection means 16, the voltage can be measured by changing the measurement cycle by the cycle variable means 17. The voltage drop state continues. In this state, when the voltage detection means 16 outputs a voltage drop signal, it outputs a drop state signal to the return prohibition means 14 and the time measurement means 18. At the same time, the notification means 19 displays the low battery state using an LCD element, LED element, or the like. In addition, the battery supply company is notified of abnormal battery low conditions via a telephone line. Further, the time measuring means 18 counts the time when the battery low signal state is detected, measures the usable time of the gas shut-off device after the battery voltage drops, and receives the signal from the return means 13 to the return prohibiting means 14 when the predetermined time is counted. Is made in a prohibited state and a cutoff output is made to the cutoff 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.

  When the time measuring means 18 receives the battery low signal and the time measuring means 18 is counting the time, the flow rate detecting means 10 or the external device means 11 detects the use state of the gas appliance of the consumer, and when an abnormal state is detected, the time is reached at that time. The time count of the measuring means 18 is stopped and the gas use is prohibited. The customer and the gas supplier are notified through the notification means 19 that the gas cannot be supplied unless the gas shut-off device itself is replaced thereafter.

  In this way, when the battery power source of the gas shut-off device detects a predetermined value or less by the voltage detection means 16, it is not immediately judged as abnormal, but the voltage detection period by the period setting means 15 is shifted from the period variable means 17 by the decrease signal. The voltage of the battery power supply means 2 is monitored and the temporary voltage drop of the battery power supply caused by the extremely low temperature due to the abnormal cold wave in winter is distinguished from the permanent battery drop caused by the actual battery capacity consumption. It is not possible to shut off after a predetermined time due to an erroneous determination due to factors or the like, thereby making it impossible for the gas consumer to use the gas appliance or causing the gas supplier to unnecessarily dispatch.

  As described above, according to the gas cutoff device of the present invention, it is possible to prevent a voltage drop due to a temporary temperature drop from being erroneously determined as battery consumption, and therefore, it can be applied to an apparatus using a battery.

Control block diagram of the gas shut-off device of the first embodiment of the present invention Control block diagram of gas cutoff device of 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 a conventional gas shut-off device

Explanation of symbols

2 Battery power supply means 3 Shut-off means 10 Flow rate detection means 11 External device means 12 Abnormality determination means 13 Return means 14 Return prohibition means 15 Period setting means 16 Voltage detection means 17 Period variable means 18 Time measurement means 20 Alternate count timing means 21 Installation time Timekeeping means

Claims (2)

Battery power supply means for supplying power, shutoff means for supplying and shutting off the gas medium, voltage detection means for monitoring whether or not the supply voltage of the battery power supply means is below a predetermined voltage, and the voltage detection means The alternating frequency counting means for counting the number of times of alternately detecting the predetermined voltage below or above the predetermined voltage, the period setting means for setting the period for driving the voltage detecting means, and the variable period for changing the period of the period setting means Means, a time measuring means for starting measurement of a predetermined time when the predetermined number of times is detected by the alternating number counting means, a return means for outputting a signal for returning the shut-off means to a gas supply enabled state, and the time measuring means. A gas shut-off device comprising: a return prohibiting means for prohibiting input of a return signal when a predetermined time has elapsed and performing shut-off output to the shut-off means. A battery power supply means for supplying power; a shutoff means for supplying and shutting off a gas medium; a voltage detection means for monitoring whether or not the supply voltage of the battery power supply means is below a predetermined voltage; and the voltage detection means. Alternating number counting means for measuring the number of times of alternately detecting a predetermined voltage or less or a predetermined voltage or more, a period setting means for setting a period for driving the voltage detection means, and a period variable means for varying the period of the period setting means And an installation time timing means for measuring the installation time of the gas shut-off device, a time measurement means for starting the measurement of a predetermined time when the predetermined number of times is detected by the alternate frequency counting means, and returning the shut-off means to a gas supply enabled state. Gas having a return means for outputting a signal to be output and a return prohibiting means for prohibiting input of a return signal when a predetermined time elapses in the time measuring means and making a shut-off output to the shut-off means Cross-sectional devices.

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