JPH02148205A - Gas interrupting device - Google Patents

Abstract

PURPOSE:To determine no initial condition against regular gas instrument use and to set a proper use condition, based on data measured in a prescribed period by providing a gas use state measuring part and a correct use condition setting changing part. CONSTITUTION:A use state measuring part 11 measures a continuous use state of every flow rate variation portion, namely, a gas use state by a signal from a variation flow rate arithmetic part 2, and partioning corresponding to a gas flow rate is not executed. A proper use condition setting changing part 12 sets a proper use condition from an output of a use state storage arithmetic part 8, and performs a setting change of a proper use condition of an observed gas flow rate range from data collected in an operation period of a time counting part 6. In such a way, an initial condition against regular gas instrument use is not determined, and based on data observed in a prescribed period, a proper use condition can be set.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides a gas shutoff device that automatically shuts off a gas passage in the event of an abnormality to prevent explosions, poisoning accidents, etc. caused by city gas, propane gas, etc. Regarding.

2. Description of the Related Art As shown in FIG. 13, a conventional gas cutoff device of this type includes a flow rate measuring means 1 that emits a signal in accordance with the amount of gas passing through a gas meter provided in a gas supply line, and said flow rate measuring means. a variable flow rate calculating section 2 that calculates the changing flow rate of the amount of gas passing through the gas meter using a flow rate signal sent from the gas meter, and a classification determining section 3 that determines which of the gas flow rate categories obtained by dividing the changed flow rate into a plurality of groups in advance. an initial condition storage section 4 that stores in advance the permissible continuous usable time corresponding to the classification determined by the classification determination section; an appropriate usage condition determination unit 5 that compares the continuous use time and the allowable continuous use time and outputs a cutoff signal when the former exceeds the latter;
A clock section 6 that counts a predetermined period of time; a start signal applying means 7 that outputs a start signal to the time counter; and a start signal applying means 7 that outputs a start signal to the time counter; a usage state storage calculation unit 8 that performs calculations based on time; and a proper usage condition setting change unit 9 that compares the output of the usage status storage calculation unit with the initial conditions and changes the setting to a predetermined value as a new appropriate usage condition. and a shutoff means 10 for shutting off the gas passage in response to a shutoff signal from the proper usage condition determination section.

The proper usage conditions here are the continuous usage time set for each combustion range based on the statistical data of the time when gas appliances in a certain combustion range are used continuously, and the data from the classification determination section is When the condition is exceeded, an activation signal is sent to the shutoff means to shut off the gas passage, thereby ensuring safety even when a gas appliance is forgotten to be turned off.

With the above configuration, when a start signal is applied to the timer, counting for a predetermined period is started, and at the same time, the use state storage calculation section is activated to continue using each preset gas flow rate category during the period. Time is measured. When the timer times out, a usage condition storage calculation unit calculates usage conditions based on the observed continuous usage time data.

For example, each stored maximum value is multiplied by a predetermined value (safety factor) and used for comparison with the initial condition in the proper usage condition setting change section, and the smaller one is reset as the proper usage condition.

FIG. 14 shows newly set appropriate continuous use time conditions based on the results of comparing the above calculated values and the initial values. In this figure, the horizontal axis represents the gas flow rate, and the vertical axis represents the continuous usage time of W, which is the proper usage condition.The broken line (Ll) represents the initial condition, and the solid line (L2) represents the initial condition.
are the newly established conditions for proper use. 1.2.3.4.5 on the horizontal axis shown in the figure indicates gas flow rate categories, and the allowable continuous use time is determined for each gas flow rate category. Category 1
．． In 2.4, the result observed and calculated by the usage state storage calculation section is set as the appropriate usage time condition.

In other words, since the calculation result was smaller than the initial condition, the latter was selected.

As mentioned above, during the timer period, the actual measured values of each category are updated, and at the same time as the timer ends, each final data is multiplied by a predetermined value in the usage state storage calculation section, and initialized in the appropriate usage condition setting change section. The conditions are compared and a new cut-off condition for the continuous usage time is set. Thereafter, the appropriate usage condition determining section compares the above-mentioned new setting conditions with the signal from the classification determining section, and if the conditions for each flow rate classification are deviated from, it is determined that there is an abnormality and the shutoff means is activated. (for example,
Problems to be Solved by the Invention However, in the above configuration, each gas flow rate class is used within the initial conditions preset assuming normal gas appliance use. For gas appliances, the appropriate operating conditions are reset based on the results of actual gas flow rate observation, but for certain gas appliances, such as hot water storage type water heaters, the appropriate operating conditions cannot be established within the initial conditions. Could not set. In other words, a storage water heater with a capacity of about 10,000 kilograms of power may take several hours to boil the entire amount of stored hot water to the specified water temperature, whereas a gas bath kettle with a capacity of about 10,000 kilograms of power or a gas instantaneous Continuous use time for water heaters and the like is only a few tens of minutes, whereas the continuous use time is extremely long.

Furthermore, the initial conditions set for general household use could not be applied to specific purposes, such as continuous use of a gas stove for commercial use. As described above, there has been a problem in that it is not possible to set appropriate usage conditions for specific instruments and specific uses.

The present invention solves such conventional problems, and specifically provides a gas cutoff device that does not set initial conditions for normal use of gas appliances, but instead sets appropriate usage conditions based on data measured within a predetermined period. This is the first purpose.

The second object is to provide a gas cutoff device that allows the measured gas flow rate to have a predetermined tolerance range without being limited to a predetermined gas flow rate category when setting the cutoff condition for a continuous use time.

The third purpose is to
An object of the present invention is to provide a gas cutoff device that corrects a smaller value to a larger value under appropriate usage conditions.

Furthermore, the fourth objective is to provide a gas cutoff device that does not set proper usage conditions only for specific appliances, but also takes into account the initial conditions set for ordinary gas appliances. There is a particular thing.

The fifth purpose is to provide a gas cutoff device that has the function of not only cutting off the gas cutoff device terminal, but also communicating with an external communication device using a communication control unit and cutting off depending on the content of communication from the outside. .

Means for Solving the Problems and In order to achieve the first object, the present invention provides a flow rate measuring means for emitting a signal in accordance with the amount of gas passing through a gas meter provided in a gas supply line, and a flow rate measuring means for generating a signal from the flow rate measuring means. a change flow rate calculation unit that calculates the changing flow rate of the amount of gas passing through the gas meter based on a signal from the gas meter; a usage status measurement unit that measures the gas usage status based on the signal from the change flow rate calculation unit; an appropriate usage condition determination section that outputs a shutoff signal when the conditions are exceeded; a shutoff means that shuts off the gas passage in response to the shutdown signal from the appropriate usage condition determination section; a timekeeping section that counts a predetermined period; and the timekeeping section. a start signal applying means for starting the timer; a usage state-memory calculation section that stores the gas usage state during the operation of the timer section and performs calculations based on the stored gas usage state; and the usage state storage calculation section. and an appropriate usage condition setting change section that sets appropriate usage conditions from the output of the.

In order to achieve the second object, the present invention uses the gas flow rate observed in the variable flow rate calculation unit and the continuous use time from the start of the gas flow until the end of the flow to the usage state measurement unit. the usage state storage calculation unit, and
A signal is output to the appropriate usage condition determination section, and the usage state storage calculation section sets a predetermined positive/negative tolerance range for the observed gas flow rate, and also outputs the measured continuous usage time data to the appropriate usage condition setting change section. It has a configuration that outputs to.

In addition, in order to achieve the third object, the present invention provides, when predetermined positive and negative tolerance ranges set respectively for a plurality of observed gas flow rates overlap, an error range is set based on continuous use time data for the overlapping portion. The apparatus is provided with an appropriate usage condition correction section that corrects the smaller one of the appropriate usage conditions to match the larger one.

Furthermore, in order to achieve the fourth object, the present invention has an initial condition setting section that sets an initial value of the proper usage conditions, and the proper usage conditions setting change section combines the calculation result data from the usage state storage calculation section and the above. This is to compare the setting value of the initial condition setting section and reset the larger one as the proper usage condition.

In order to achieve the fifth object, the present invention calculates and sets a usage condition for outputting a warning signal at a predetermined timing before a shutdown occurs based on a signal from a proper usage condition determining unit, and a signal from a usage status measuring unit. a cutoff notice signal generation section that outputs a notice signal when the notice signal output exceeds the use conditions; and a communication control section that performs information communication, and the cutoff means is activated by a cutoff signal output from the appropriate usage condition determination section or by a cutoff signal output from the communication control section in response to an instruction from the outside. .

Operation The gas cutoff device of the present invention, with the above-described configuration, does not particularly set initial conditions for normal use of gas appliances, but rather sets proper usage conditions based on data observed within a predetermined period.

Further, in setting the cutoff condition for the continuous use time, the measured gas flow rate is not limited to a predetermined gas flow rate category, but is set within a predetermined allowable range.

Furthermore, when the above-mentioned allowable widths overlap, the appropriate usage conditions in the small flow rate range are corrected to the appropriate usage conditions in the large flow rate area.

Then, instead of setting proper usage conditions only for a specific appliance, proper usage conditions are set by taking into account the initial conditions set for ordinary gas appliances.

Furthermore, the communication control unit communicates with an external communication device and is interrupted depending on the content of communication from the outside.

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

In FIG. 1, components with the same numbers as those in FIG. 13 have the same functions. Reference numeral 11 denotes a usage status measuring unit that measures the gas usage status based on a signal from the variable flow rate calculation unit 2, and is not segmented according to the gas flow rate. Reference numeral 12 denotes an appropriate usage condition setting change unit that sets appropriate usage conditions from the output of the usage state storage calculation unit 8, and does not particularly perform comparison with the initial conditions.

The operating state of this function will be explained with reference to FIGS. 2 and 3.

In FIG. 2, the horizontal axis shows the elapsed time and the vertical axis shows the gas flow rate. When the occurrence of the gas flow rate Q1 is observed at time t1, the usage state measuring section 11 starts measuring the continuous usage time of Ql.

Next, at time t2, the gas flow rate Q2 is added, and the usage state measurement unit 11 starts measuring the continuous usage time of Q2. That is, from time L2 to time t3, continuous use time measurement is performed in parallel. As can be seen from the figure, gas flow rate Q2 disappears at time t3, and gas flow rate Q1 is also not observed at time t4.In other words, the continuous use time of gas flow rate Q1 is from tl to t4, and the continuous use time of Q2 is is from t2 to t3.

FIG. 3 displays the results of determining the shutoff conditions from the continuous use time data determined in FIG. 2.

The horizontal axis is the gas flow rate, and the vertical axis is the proper operating conditions, which is the cutoff condition.
Here, the continuous usage time is shown. Each of the continuous use time data is multiplied by a predetermined coefficient, that is, a safety factor, and TI is calculated for the gas flow rate Q1, and T2 is calculated for the gas flow rate Q2 as the calculation result. In the figure, positive and negative predetermined tolerance ranges H1 and H2 are expressed in percentages for gas flows iQ1 and Q2, respectively. Within the above tolerance range, the continuous usage time, which is a proper usage condition, is the same value. The reason why the permissible error range was determined here is to ensure that the appropriate operating conditions can be maintained even if the gas flow rate varies due to gas pressure fluctuations, etc.

The above-mentioned contents can be easily realized by using calculation and judgment functions based on program operation of a microcomputer or the like. A schematic program flow is shown below in FIG. 4.

In FIG. 4, when the program starts, initialization is executed at 13, and no particular setting is made as a condition for proper continuous use time. That is, during the period when the timer is counting, only the data collection function is operated, and the logic cutoff based on the gas flow rate is set not to operate. Subsequently, flow rate measurement is performed in step 14, and calculation is performed in order to detect changes in gas flow rate in step T5. Thereafter, in step 16, the continuous usage time for each of the calculated flow rate changes, that is, the usage status is measured. 1
At step 7, it is determined whether or not the timer is counting, and if it is, at step 18, a predetermined tolerance range is calculated for each gas flow rate, and the usage time for each gas flow rate is memorized. . After passing through step 18, and if it is not counting at step 17, it is determined at step 19 whether or not the usage time exceeds the proper usage conditions. If it exceeds the limit, branch from 2o to 21 and output a cutoff signal. If it is not exceeded, that is, if it is not abnormal, the process branches to 22.

At step 22, it is determined whether or not the proper usage conditions have already been changed, and if they have not been changed, it is determined at step 23 whether or not the timer has finished counting. When the count has ended, the usage state storage calculation unit performs calculation based on the data stored in step 24. That is, the stored data is multiplied by a predetermined coefficient. Subsequently, in step 25, settings for proper usage conditions are changed. Then, in step 26, a flag indicating that the proper usage conditions have been changed is set. 23
If the counting is not completed at 27, it is checked at 27 whether or not the timer is counting, and if it is, the counting is continued at 28. If the count is not in progress, it is checked at 29 whether or not there is a start signal, and if there is, the timer starts counting at 30. If there is no activation signal, or if it has been changed in 22, or 26.2 Translation 3
After passing through 0, return to the flow rate measurement in (2) and continue program processing.

By executing this program flow, the functions of the gas cutoff device of the present invention can be realized. That is, from the data collected during the timer operation period, the setting of the proper usage conditions for the observed gas flow rate range is changed, but the cutoff conditions for the range where the relevant flow rate is not observed remain unset.

Next, another embodiment of the present invention will be described with reference to FIG.

In FIG. 5, the same numbers as in FIG. 1 are components having the same functions. 31, when the predetermined positive and negative tolerance ranges set respectively for a plurality of observed gas flow rates overlap, the smaller one of the appropriate usage conditions set from the continuous usage time data of the overlapped portion is adapted to the larger one. In the appropriate usage condition correcting section, 32 is a proper usage condition setting changing section that takes into account the signal from the correction section and sets the appropriate usage condition.

FIG. 6 shows the functional results of the other embodiment described above. The horizontal axis represents the gas flow rate, and the vertical axis represents the shutoff condition, ie, the continuous use time. As is clear from the figure, the positive allowable range of the gas flow rate Q1 and the negative allowable range of the gas flow rate Q2 overlap. Therefore, the overlapping portion is corrected by the appropriate usage condition correction section to determine the smaller of the appropriate usage conditions (continuous usage time T2 for gas flow rate Q2).
) is the larger one (continuous use time TI for gas flow rate Ql)
) has been corrected to comply with. That is, the shaded area in the figure is the correction result, and the negative tolerance range for the gas flow rate Q2 is T1 applied to the continuous use time condition.

The above content can be easily realized by using calculation and judgment functions based on the program operation of a microcomputer, etc., and a part of the program flow will be explained with reference to FIG. Portions with the same numbers as in FIG. 4 are steps that perform the same actions. The correction function shown in FIG. 6 is step 33, in which correction of the proper usage conditions as described above is executed.

Further, another embodiment of the present invention will be explained with reference to FIG.

In FIG. 8, components with the same numbers as those in FIG. 1 and FIG. 13 have the same functions. Reference numeral 34 denotes an appropriate usage condition setting change section which compares the calculation result data from the usage state storage calculation section 8 and the setting value of the initial condition setting section 4, and resets the larger one as the appropriate usage condition.

The functions of the other embodiment will be explained with reference to FIG. The horizontal axis represents the gas flow rate, and the vertical axis represents the continuous use time, which is the cutoff condition. The initial conditions are shown in the figure, and the allowable continuous use time is set for each gas flow rate category. However, within the allowable error range of the gas flow IQ1 for which data was actually observed, the result from the usage state memory calculation unit is larger than the initial condition, so T1 is applied as the cutoff condition for this part. Ru.

This content can also be easily realized by using calculations and judgment functions based on program operations. For example, in setting the appropriate usage conditions 25 shown in FIG. It is sufficient to compare the setting value of the condition setting section and reset the larger one as the proper usage condition.

According to the present invention, proper usage conditions are not determined only for a specific appliance, but are also set in consideration of initial conditions set for ordinary gas appliances.

Further, another embodiment of the present invention will be explained with reference to FIG. In this figure, the same numbers as in FIG. 1 are components having the same functions. The cutoff notice signal ordering unit 35
A usage condition for outputting a warning signal at a predetermined timing before shutoff is calculated based on the signal from the appropriate usage condition determining unit 36, and when the signal from the usage state measuring unit 11 deviates from the usage condition for outputting the warning signal, Outputs a warning signal. Further, the communication control unit 38 includes the appropriate usage condition determination unit 36, the cutoff notice signal generation unit 35, and the appropriate usage condition setting change unit 3.
Information communication is performed with an external communication device in response to a signal from 7. That is, as a result of data observation, information on whether the cut-off condition has been changed by the appropriate usage condition setting change section, information on the warning signal output from the cut-off notice signal generation section, or information on the cut-off signal from the appropriate usage condition determination section. The signals are transmitted according to a predetermined communication protocol. It also outputs a cutoff signal using a signal from an external communication device. And the blocking means 1
0, the gas passage is cut off in response to a cutoff signal from the appropriate usage condition determination section or the communication control section. The information on the advance notice signal includes information such as the gas flow rate and how long it will take to shut off in relation to the shutoff conditions. Therefore, in addition to catching the above-mentioned advance notice information at a location that has an external communication device, we also communicate with the gas cutoff device user using a means other than communication with the gas cutoff device (for example, communication by telephone). It becomes possible to issue a warning.

The contents of this embodiment will be explained with reference to FIG. This figure shows a communication sequence between the user's home 39 and the center 40. At A, a start signal is sent from the user's home, which is a terminal, to the center, at B, communication of predetermined information is carried out, and at C, a communication end signal is sent from the center to the user's home. Next, FIG. 12 shows a system in which the above-mentioned contents are realized using arithmetic and judgment functions based on program operations of a microcomputer or the like. This figure is a modified version of the appropriate usage condition determining unit 9 in Figure 4 up to the determining unit for determining whether or not the appropriate usage conditions in 22 have already been changed. Judgment 1 is carried out, and if it is determined at 42 that the advance notice level is lower than that, the process branches to step 22 above. However, if the notification level is higher than the notification level at 42, it is determined whether the notification to the center has already been completed or not at 43, and if the notification has not been completed yet, the shutdown notification information is reported to the center at 44, that is, a signal is transmitted. . If you have already reported in 43, and after passing through 44,
In step 5, it is determined whether a cutoff signal has been sent from the center.
If the cutoff signal has been received, the cutoff signal is sent to the cutoff device at 21 to execute the gas passage cutoff operation. Further, if the cutoff signal is not sent at 45, it is determined at 46 whether the gas usage state has reached the cutoff level or not.
Perform appropriate usage condition determination 2. If there is an abnormality in step 47, that is, if it has reached the cut-off level, the cut-off information is reported to the center in step 48, and the processing in step 21 is performed. Also, 47
If there is no abnormality, the process branches to 22.

In this way, the center side can determine whether or not the user's gas should be cut off in response to the cutoff notice signal, and send out a cutoff command, so the terminal side can suddenly cut off the gas passage and prevent the gas from being used. It never goes away.

In this embodiment, the cutoff signal is also output from the proper usage condition determination section within the terminal, but the cutoff means may be activated by an instruction only from the center device.

Effects of the Invention As described above, the gas cutoff device of the present invention provides the following effects.

(11) By constantly monitoring the gas usage status and comparing it with the set proper usage conditions (continuous usage time), it is possible to detect forgetting to turn off gas appliances and gas leaks over a long period of time. If there is a deviation, that is, if it is determined that there is an abnormality, the shutoff means will operate and stop the gas supply.
This has the effect of preventing dangerous situations such as gas explosions and gas poisoning. Also, certain gas appliances,
For example, a predetermined usage time condition is set for a hot water storage type water heater even if the normal usage time condition is too short, and a predetermined usage time condition is set for a general household use when a gas stove is used continuously for commercial purposes. Although the initial conditions could not be applied, predetermined appropriate usage time conditions can be set from actual data observation, making it possible to realize a gas shutoff device that fully satisfies actual usage conditions while maintaining ultimate safety in gas usage. It has the effect of being able to do things.

(2) When setting continuous use time conditions, do not limit the gas flow rate to a predetermined gas flow rate category, or set a predetermined tolerance range for the actual flow value, rather than limit it to a predetermined tolerance flow rate category for the actual flow value. By installing this, it is possible to observe data from actual equipment installed in the user's home and to set cutoff conditions that match the data.

(3) When the above tolerance areas overlap, by correcting the smaller appropriate usage conditions to the larger one, gas can be used without any problems in actual use even if the gas flow rate varies due to gas pressure fluctuations, etc. effective.

(4) In addition to determining proper usage conditions for specific appliances as described above, conditions can also be set taking into account the initial conditions set for ordinary gas appliances.

(5) By communicating with an external communication device by the communication control unit and blocking the communication depending on the content of the communication from the outside, the gas passage is not suddenly blocked on the terminal side and gas cannot be used. In other words, if you are using gas fuel for business such as a restaurant, you will receive warning information from the center (for example, you will be notified by phone that a warning signal has been received, along with its contents.
By checking the use of the equipment to resolve the abnormal condition after confirming (confirmation), and finally sending out a shut-off signal, it is effective in preventing damage to business without the store's consent.

[Brief explanation of the drawing]

Figure 1 is a functional block diagram of a gas cutoff device in an embodiment of the present invention, Figure 2 is a diagram showing temporal changes in gas flow rate, Figure 3 is a diagram showing usage time conditions of the device, and Figure 4 is a diagram showing temporal changes in gas flow rate. FIG. 5 is a functional block diagram of a gas cutoff device in another embodiment of the present invention, and FIG. 6 is a diagram showing a schematic program flow of the device.
7 is a diagram showing a part of the program flow of the device, FIG. 8 is a functional block diagram of a gas cutoff device in still another embodiment of the present invention, and FIG. FIG. 9 is a diagram showing operating time conditions of the same device, FIG. 10 is a functional block diagram of a gas cutoff device in another embodiment of the present invention, FIG. 11 is a communication sequence diagram of the same device, and FIG. 12 is a diagram showing the same. A diagram showing a part of the program flow of the device, FIG. 13 is a functional block diagram of a conventional gas cutoff device, and FIG. 14 is a diagram showing a part of the program flow of the device.
The figure is a diagram showing usage time conditions of a conventional device. ■...Flow rate measurement means, 2...Change flow rate calculation section, 4...Initial condition setting section, 5...
・Appropriate usage condition determination section, 6...Timekeeping section, 7...
. . . Starting signal application means, 8 . . . Usage state storage calculation unit, 10 .
・Usage condition measurement section, 12... Appropriate use condition setting change section, 31... Appropriate use condition correction section, 35.
. . . Shutdown notice signal ordering section, 38 . . . Communication control section. Name of agent: Patent attorney Shigetaka Awano Haka 1 person Fig. Fig. Fig. 12 Fig. 12 Fig. 12 Figure 14 Sword Su9!

Claims (5)

[Claims] (1) A flow rate measuring means that emits a signal according to the amount of gas passing through a gas meter installed in a gas supply line, and a changing flow rate calculating section that calculates a changing flow rate of the gas amount passing through the gas meter based on the signal from the flow rate measuring means. a usage state measuring section that measures the gas usage state based on the signal from the changing flow rate calculation section; a proper usage condition determining section that outputs a cutoff signal when the signal from the usage state measuring section deviates from the proper usage condition; A shutoff means for shutting off a gas passage in response to a cutoff signal from a proper usage condition determination section; a timekeeping section for counting a predetermined period; a starting signal application means for starting said timekeeping section; and gas usage while said timekeeping section is in operation. A usage state storage/calculation section that stores the state and performs calculations based on the stored gas usage state; and a proper usage condition setting change section that sets appropriate usage conditions from the output of the usage state storage/calculation section. gas cutoff device. (2) The usage state measuring unit measures the gas flow rate observed by the changing flow rate calculation unit and the continuous usage time from the start of the gas flow until the end of the flow, and calculates the usage state memory. and a proper usage condition determining unit, and the usage state storage calculation unit sets a predetermined positive and negative tolerance range for the observed gas flow rate, and determines whether the measured continuous usage time data is used properly. The gas cutoff device according to claim (1), which outputs the output to the condition setting change section. (3) When the predetermined positive and negative tolerance ranges provided for multiple observed gas flow rates overlap, the smaller one of the appropriate usage conditions set from the continuous usage time data for the overlapping portion is set to the larger one. The gas cutoff device according to claim (2), further comprising a correcting section for correcting appropriate usage conditions. (4) having an initial condition setting section for setting initial values of proper usage conditions; the proper usage conditions setting changing section compares the calculation result data from the usage state storage calculation section with the setting value of the initial condition setting section; The gas cutoff device according to claim (2), wherein the larger one is reset as the proper usage condition. (5) Based on the signal from the appropriate usage condition determination section, calculate and set the usage conditions for outputting a warning signal at a predetermined timing before the shutdown, and if the signal from the usage condition measurement part deviates from the usage conditions for outputting the warning signal, The device includes a cutoff notice signal generation unit that outputs a notice signal, and a communication control unit that communicates information with the outside in response to signals from the proper usage condition determination unit, the cutoff notice signal generation unit, and the proper usage condition setting change unit. However, the cutoff means is a cutoff signal output from the appropriate usage condition determination section, or
The gas cutoff device according to claim 2, which is activated by a cutoff signal output from the communication control unit in response to an external instruction.