JPH10143204A - Gas circuit breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas circuit breaker with which the use of a gas instrument for abnormal time is detected and a gas emergency trip valve is closed. SOLUTION: The switching command of shutoff time corresponding to a change in the tendency of use by season or user condition is inputted from an external communication part 11 and held in a shutoff time switching command holding part 8, a section by tendency to be switched when the date and time of a clock part 9 for counting current data and time become the data and time in the switching command is outputted to a shutoff time change part 6, and setting in a shutoff time holding part 7 by instruments is reloaded by the shutoff time by instruments of the section by tendency held in a shutoff time holding part 5 by tendency and instruments. When a use instrument estimating part 2 estimates the section by instruments from the using amount of gas instrument under using, a shutoff time counting part 3 counts the shutoff time of the relevant section by instruments and when the shutoff time is completely counted, gas shutoff is executed by an emergency trip valve driving part 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas shut-off device as a safety measure for gas use, and more particularly to a gas shut-off device for detecting abnormal use of gas and shutting off gas supply.

[0002]

2. Description of the Related Art When a gas appliance is used continuously for an abnormal time, an abnormal situation such as leakage of raw gas due to forgetting to turn off the gas appliance or disappearance of the gas appliance can be considered. It is necessary to shut off the gas supply. FIG. 5 shows a conventional configuration of a gas shutoff device having a function of shutting off a gas by using such an abnormal time.

In FIG. 5, a gas shutoff device 20 according to the conventional configuration estimates a gas appliance in use from a gas flow rate by a used appliance estimating unit 21 and counts an operating time by an interruption time counting unit 26 when an abnormal time is used. When it is determined that there is, a gas shutoff valve is driven by the shutoff valve drive unit 27 to shut off gas supply. The interruption time counting unit 2
The time counting for gas shut-off according to 6 is a tool-specific shut-off time in which a continuous use time limit divided by gas usage is set, and continuous use exceeding this limit is determined as abnormal time use.

[0006] The trend-specific appliance-specific cut-off time holding unit 23 stores a trend-specific appliance-specific shutdown time table in which the appliance-specific shutdown time classified by the amount of gas used per unit time is further classified according to usage trends such as seasons and user circumstances. When the external communication unit 24 receives a command to switch the usage tendency by communicating with the centralized monitoring center, the cutoff time changing unit 25 determines the device-specific cutoff time for each tendency according to the switching command based on the switching command. It is taken out from the shut-off time holding unit 23 and cut-off time holding unit 22 for each appliance.
Rewrite the device-specific shutdown time table.

The cut-off time counting section 26 estimates the applicable gas use category of the gas appliance in use from the gas flow rate detected by the used appliance estimating section 21, and holds the estimated information in the appliance-specific cut-off time holding section 22. The shut-off time of the gas usage class is counted, and when the count reaches the corresponding shut-off time, a shut-off request signal is output to the shut-off valve driving unit 27 to execute the gas shut-off operation. By this operation, when the gas appliance is used for an abnormal time, the gas is shut off, and the safety of gas usage can be ensured.

[0006]

In the gas shut-off device according to the conventional configuration, the gas usage tendency changes with the seasonal change from summer to winter and from winter to summer, so the cut-off time is switched according to the usage tendency. There is a need. This switching process
Since many gas shut-off devices managed by the centralized monitoring center must be performed at the same time at the same time, processing work is concentrated, and there is a first problem that errors occur and reliable safety monitoring is neglected. .

[0007] Further, a predetermined time (for example, 5 minutes) before executing the gas shutoff, a notification is sent from the external communication unit to the centralized monitoring center, and a notice of shutting down the gas is sent from the centralized monitoring center to the user by telephone. When the setting is made, the cutoff time can be extended by the request of the user who was notified of the cutoff, and if this is repeated, the cutoff time is extended indefinitely, ensuring safety by using abnormal time in the long term There was a second problem that was not possible.

The present invention has been made to solve the above first and second problems, and an object of the present invention is to provide a gas shut-off device capable of effectively performing gas shut-off by using an abnormal time. .

[0009]

According to a first aspect of the present invention, there is provided a method for estimating a corresponding category of appliances classified by gas usage from a detected gas flow rate. An appliance estimating unit, an appliance-specific interruption time holding unit that retains an appliance-specific interruption time that shuts off gas supply at a continuous use time limit set for each appliance-specific classification, and an appliance estimated by the appliance estimation unit. The cut-off time by section is taken out of the cut-off time holding unit by instrument, the cut-off time by unit is counted, and the cut-off time counting unit that outputs a cut-off request signal when the counting is counted up, by the input of the cut-off request signal. A gas shutoff device comprising a shutoff valve driving unit for closing and driving the gas shutoff valve, wherein the device-specific shutoff time is divided by a trend-specific shutoff time that is changed according to a usage tendency such as a season or user circumstances. A trend-specific appliance-specific shutdown time holding unit that holds a shutdown time table, an external communication unit that receives a command of switching of the trend classification and a switching date and time by communication from outside, a clock unit that measures a current date and time, and the external unit. The switching unit according to the trend received by the communication unit and a command of the switching date and time, and the cutoff time switching command holding unit that outputs the trend-based switching command when the current date and time matches the switching date and time command, When the trend-specific switching command is input, the trend-specific appliance-specific breaking time identified by the trend-specific category switching command is extracted from the trend-specific appliance-breaking time table held by the trend-specific appliance breaking time holding unit. The apparatus further comprises a cut-off time changing unit that rewrites the cut-off time table for each appliance in the cut-off time holding unit for each appliance.

[0010] According to the above configuration, the switching time and the corresponding classification according to the trend can be stored in advance in the cut-off time switching command holding unit. The switching of the shutoff time corresponding to the change of the gas shutoff time can be sequentially performed on the gas shutoff device of each user within a period preceding the switching date and time. The switching of the gas cutoff time is performed when the switching date and time input from the outside to the shutoff time switch command holding unit via the external communication unit and held and the current date and time counted by the clock unit match each other, The switching time for each appliance to be switched is extracted from the tendency-specific appliance-specific interruption time table held by the tendency-specific appliance-specific interruption time holding unit, and the appliance-specific interruption time table of the appliance-specific interruption time holding unit is rewritten. Therefore, the switching time can be sequentially set in advance without simultaneously switching the shut-off time due to a change in usage tendency due to seasonal change in the gas shut-off device of each user, so that detailed measures can be taken and gas safety can be ensured. Can be.

Further, a second invention of the present application for solving the first problem is a used appliance estimating unit for estimating a corresponding category of appliance classified by gas usage from a detected gas flow rate. And a tool-specific cut-off time holding unit that holds a tool-specific cut-off time for shutting off gas supply at a continuous use time limit set for each of the tool-specific categories, and a tool of a tool-specific category estimated by the used tool estimation unit A separate cut-off time is taken out from the device-specific cut-off time holding unit, the device-specific cut-off time is counted, and a cut-off time counting unit that outputs a cut-off request signal when the counting is counted up, and a gas shut-off valve based on the input of the cut-off request signal. And a shut-off valve drive unit for closing and closing the device, wherein the shut-off time for each appliance is divided by the shut-off time for each appliance which is changed according to the usage tendency such as a season or user circumstances. A switching unit for storing the table, a communication unit for receiving the switching of the classification according to the trend and a command to change the switching date and time from the outside, a clock unit for measuring the current date and time, A cut-off time switch data holding unit that holds a cut-off time switch date and time and a corresponding trend classification and outputs a trend switch command when the current date and time match the switch date and time; When input, the cut-off time for each appliance identified by the trend-specific switching command is taken out from the cut-off time table for each appliance held by the appliance-specific shut-off time holding unit, and the appliance for each appliance in the appliance-specific shut-off time holding unit is retrieved. And a cut-off time changing unit for rewriting the cut-off time table.

According to the above configuration, the switching date and time of the cutoff time according to the seasonal change and the command of the corresponding classification according to the trend can be stored in the cutoff time switching data holding unit in advance, and the clock unit for counting the current date and time can be stored. When the switching date and time is reached, the cutoff time switching change data holding unit outputs a switching command for the trend-based classification, so that the shutoff time changing unit stores the trending device-specific shutdown time held by the trend-specific appliance-specific shutoff time holding unit. The appliance-specific shut-off time table of the appliance-specific shut-off time holding unit is rewritten by taking out the appliance-specific shut-off time of the trend-based classification identified by the switching command from the table. Therefore, it is not necessary to switch the setting of the gas shutoff time for each user simultaneously with the change of the season, and only when it is desired to change the switching date and time, the cutoff time switching data holding unit via the external communication unit. Since the data can be rewritten, the monitoring work can be labor-saving, and more detailed measures can be taken, and the safety of gas use can be more reliably ensured.

A third invention of the present application for solving the above-mentioned second problem is a use appliance estimating section for estimating a corresponding category of appliance classified by gas usage from a detected gas flow rate. And a tool-specific cut-off time holding unit that holds a tool-specific cut-off time for shutting off gas supply at a continuous use time limit set for each of the tool-specific categories, and a tool of a tool-specific category estimated by the used tool estimation unit A separate cut-off time is taken out from the device-specific cut-off time holding unit, the device-specific cut-off time is counted, and a cut-off time counting unit that outputs a cut-off request signal when the counting is counted up, and a gas shut-off valve based on the input of the cut-off request signal. And a shut-off valve drive unit for closing and closing the device, wherein the shut-off time for each appliance is divided by the shut-off time for each appliance which is changed according to the usage tendency such as a season or user circumstances. And an external communication unit that receives a command to switch the classification according to the trend from the outside and receives a notification of immediately before the shutdown and a command to extend the shutdown time by the external communication. And a cutoff time extension limit count holding unit for holding the cutoff time extension limit count, and a tendency that the trendy appliance-specific cutoff time holding unit holds when a switching command of a trend-based category is input from the external communication unit. The appliance-specific interruption time identified by the switching command is extracted from the appliance-specific interruption time table, the appliance-specific interruption time table of the appliance-specific interruption time holding unit is rewritten, and the interruption time extension command is input from the external communication unit. When the cutoff time is extended, the cutoff time for each device held by the cutoff time holding unit for each appliance is set within the limit number of times held by the cutoff time extension limit number holding unit. And characterized by being provided with a cut-off time changing unit for changing an extension time.

According to the above configuration, when the user is notified of the shutdown before a predetermined time before the counting of the shutdown time by the shutdown time counting unit is counted up, the limit of the number of times that the shutdown time is extended by a request from the user is limited. Since the time is held in the time extension limit holding unit, the extension of the cutoff time is limited to a predetermined limit. Therefore, it is possible to eliminate the deficiency of the abnormal time use detection due to the unlimited extension, and to reliably detect the abnormal time use.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention.
The following embodiments are examples embodying the present invention and do not limit the technical scope of the present invention.

First, a gas shutoff device common to each of the control configurations described in the first to third embodiments will be described.
The schematic configuration will be described with reference to the schematic diagram shown in FIG.

In FIG. 4, a gas shut-off device 1 includes a pressure sensor 13 for detecting a gas pressure in a gas passage, a flow sensor 12 for detecting a flow rate of gas flowing through the gas passage, and a gas supply by shutting off the gas passage. A gas shutoff valve 14 to be stopped, an external input unit 15 for inputting a return signal when the shutoff by the gas shutoff valve 14 is restored, an external communication unit 11 for communicating with a centralized monitoring center, and the pressure sensor 13 And a gas shutoff valve 14 based on a detection signal from the flow sensor 12 and an input signal from the external communication unit 11 and the external input unit 15.
And a control unit 10 for controlling the opening and closing of.

A control structure in which the gas shut-off device 1 having the above structure detects the abnormal use of gas and shuts off the gas supply will be described below with reference to first to third embodiments.

FIG. 1 is a block diagram showing a control configuration of the gas shut-off device 1a according to the first embodiment.

The gas shutoff device 1a counts the continuous use time of the gas appliance estimated by the appliance estimation unit 2 from the gas flow rate detected by the flow rate sensor 12 by the interruption time counting unit 3, and the counting time is determined by the appliance cutoff time. When the continuous use time limit held by the holding unit 7 is reached, the shutoff valve driving unit 4 controls the gas shutoff valve 1.
The gas supply is shut off by closing and closing the gas supply 4 to thereby ensure the safety of gas use by using an abnormal time such as forgetting to turn off the gas.

The estimation of the gas appliance in use by the appliance estimation unit 2 calculates the gas consumption per unit time from the difference between the increase and decrease of the gas flow rate, and calculates the gas consumption per unit time set in advance. The gas appliances are estimated by referring to the values divided by the range. The cutoff time at the limit of the continuous use time for each of the ranges of the gas usage amount is stored in the cutoff time holding unit 7 for each appliance as a cutoff time table for each appliance. Table 1 is an example of an appliance-specific shut-off time table in which the shut-off time is set for each of the gas appliances according to the gas usage amount.

[0022]

[Table 1]

The shut-off time set in the appliance-specific shut-off time table needs to be changed according to the usage tendency according to the user's situation or the seasonal usage tendency, and the appliance-specific shut-off time is further classified according to the trend. The shut-off time table is set, for example, as shown in Table 2, and is held in the trend-specific appliance-specific shut-off time holding unit 5.

[0024]

[Table 2]

The cut-off time changing unit 6 changes the cut-off time set in the appliance-specific cut-off time holding unit 7 into the corresponding appliance-specific cut-off time according to the switching command, and the tendency-specific appliance-specific means time holding unit 5.
And rewrites the appliance-specific interruption time table in the appliance-specific interruption time holding unit 7. The rewriting of the appliance-specific cutoff time table is performed as follows.

The external communication unit 11 is configured to be able to communicate with the centralized monitoring center through a telephone line. It is input to and held in the time switching command holding unit 8.

The clock section 9 counts the current date and time. When the counted current date and time match the switching date and time, the cut-off time switch command holding section 8 changes the trend classification held by the cut-off time changing section 6. Output to For example, the command for the trend classification and the switching date and time is “trend classification = for winter, switching date =
0:00 on November 1 ", and when the appliance-specific interruption time table currently held by the appliance-specific interruption time holding unit 7 is the trend-based classification" normal "as shown in Table 1,
At 0:00 on November 1st, the shut-off time changing unit 6 extracts the shut-off time for each appliance in the trend category “Winter” as shown in Table 2 from the appliance-specific shut-off time holding unit 5 at the time of 0:00 on November 1, and separates it for each appliance. The appliance-specific interruption time held by the interruption time holding unit 7 is rewritten to the appliance-specific interruption time in the trend-based category “for winter”.

The cut-off time counting section 3 retrieves the cut-off time corresponding to the gas appliance estimated by the use appliance estimating section 2 from the start of gas use from the appliance-specific cut-off time table of the appliance-specific cut-off time holding section 7 and uses the gas. The time from the start to the cutoff time is counted. When the used tool estimating unit 2 detects the end of gas use during counting of the cutoff time, the counting is stopped to clear the count. When it is determined that the gas appliance used on the way has been changed due to a change in the flow rate, the corresponding cutoff time is taken out again and the counting is started again. When the count reaches the cutoff time,
Since the shut-off request signal is output to the shut-off valve driving unit 4, the shut-off valve driving unit 4 drives the gas shut-off valve 14 to close and cut off the gas supply.

In the present configuration, the switching of the shutoff time due to seasonal change or the like can be held in the shutoff time switch command holding unit 8 prior to the switching date and time, so that many gas shutoff devices 1 under monitoring can be simultaneously controlled. Since it is not necessary to perform a complicated operation for performing the switching process and the switching process can be sequentially performed prior to the switching date and time, it is possible to eliminate the occurrence of a mistake due to the simultaneous processing and to take a detailed safety measure for gas use.

Next, a second embodiment of the present invention will be described. FIG. 2 shows a gas shut-off device 1b according to the second embodiment.
FIG. 3 is a block diagram showing a control configuration of FIG. Elements common to the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 2, a gas shutoff device 1b according to the second embodiment is configured by replacing the shutoff time switching command holding unit 8 in the first embodiment with a shutoff time switching data holding unit 16. The cut-off time switching data holding unit 16 previously stores data on the cut-off time switching date and time and the trend-based classification corresponding to the switching date and time. This data is, for example, a combination of the switching date and time and the trend-based classification such as switching from “normal” to “winter” at 0:00 on November 1 at the time of installation of the gas shut-off device 1. And the setting area (discrimination of cold and warm areas, etc.) and the cutoff time switching data holding unit 1
6 is stored in a storage means such as a memory provided in 6.

When the switching date and time held by the cut-off time switching data holding unit 16 matches the current date and time counted by the clock unit 9, the cut-off time switching data holding unit 16 sorts the trend-based classification combined with the matched date and time. Is output as a shut-off time switching command, so that the shut-off time changing unit 6 takes out the appliance-specific shut-off time specified by the trend-specific category from the trend-specific appliance-specific shut-off time holding unit 5 and outputs the appliance-specific shut-off time holding unit 7 Of the appliance-specific cutoff time table is executed.

When it is desired to change the data stored in the cut-off time switching data holding unit 16, for example, when the seasonal change due to abnormal weather has come earlier, the switching date and time data to be changed via the external communication unit 11 is changed. By inputting, the stored data can be rewritten.

In this configuration, the data of the switchable date and time and the classification according to the tendency which can be predicted can be stored in the cutoff time switch data holding unit 16 in advance. It is not necessary to perform the switching process on the gas shut-off device 1 all at once, and it is only necessary to respond to an unexpected situation.

Next, a third embodiment of the present invention will be described. FIG. 3 shows a gas shut-off device 1 according to a third embodiment.
It is a block diagram which shows the control structure of c. Elements common to the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 3, in the gas shutoff device 1c according to the third embodiment, when the external communication unit 11 receives a switching command of the trend classification from the centralized monitoring center, the switching command is input to the shutoff time changing unit 17. It is configured to
The cut-off time changing unit 17 retrieves the appliance-specific cut-off time of the trend-based category instructed from the trend-specific appliance-specific cut-off time holding unit 5 based on the trend-specific category switch command, and disconnects the appliance-specific cut-off time holding unit 7 by the appliance. Rewrite the time table.

When the used appliance estimating unit 2 estimates the gas appliance that has been used, the shut-off time counting unit 3 starts counting the shut-off time of the appliance-specific section held by the appliance-specific shut-off time holding unit 7, and the counting is started. A predetermined time before counting up (for example, 5
(Minutes ago), a notification is sent to the centralized monitoring center through the external communication unit 11 immediately before the interruption. The centralized monitoring center that has received the notification immediately before the shutoff notifies the user by telephone and gives an advance notice of shutoff indicating that the gas will be shut off due to abnormal use, and confirms the type and use state of the gas appliance, and confirms the safety of gas use. If there is no problem and there is a request from the user, a process for extending the execution of gas shutoff can be performed.

The cut-off time extension limit number holding unit 18 holds the cut-off time extension limit number, and the cut-off time changing unit 17 receives a cut-off time switching command from the external communication unit 11 and holds the cut-off time for each appliance. Starting from when the appliance-specific cut-off time table is rewritten, the number of times that the cut-off time held by the appliance-specific cut-off time holding unit 7 has been extended thereafter is compared with the limit number held by the cut-off time extension limit count holding unit 18. Then, when the number of times of extension matches the limit number of times, the extension of the interruption time thereafter is stopped.

The processing for extending the shut-off time is performed by judging from the gas appliance and the use condition to be confirmed when the centralized monitoring center gives a notice of shut-off, and if there is no problem in use, the user is temporarily stopped using the gas. When the operation is stopped, the use tool estimating unit 2 detects the stop of the gas use, so that the counting of the shut-off time counting unit 3 is stopped, and the counting of the shut-off time is started when the use is started again, and the extension of the shut-off time is extended. The re-use can be started with the cut-off time held in the device-specific cut-off time holding unit 7 without performing.

However, when it is determined that there is any doubt in use, the processing is performed by extending the cutoff time as described above. As for the extension of the cutoff time, the command of “extension” in the tendency classification shown as an example in Table 2 is issued by the external communication unit 1.
1, the cutoff time changing unit 17 takes out the “extended” device-specific cutoff time from the trend-specific device-specific cutoff time holding unit 5 and obtains each cutoff in the device-specific cutoff time table of the device-specific cutoff time holding unit 7. Add to time. For example, when the appliance-specific shutdown time in the trend-based “normal” category shown in Table 2 is set in the appliance-specific shutdown time table, in the appliance-specific category “1” in Table 2, the “extended” of +20 is increased to 120 minutes. The minute is added and rewritten to 140 minutes.

If the process of extending the cutoff time is repeated many times, the cutoff time becomes unlimited, and the safety cannot be ensured by detecting the use of the abnormal time. For example, in the case where the person in charge of the centralized monitoring center changes work, even if the shut-off time is extended first, but it is not known, the time is extended many times. Therefore, each time the cutoff time changing unit 17 executes the extension of the cutoff time based on the extension command input from the external communication unit 11, the cutoff time change unit 17 compares the extension time with the extension limit number held by the cutoff time extension limit number holding unit 18. Is reached the extension limit number, the extension process is stopped, and the gas shutoff is executed simultaneously with the end of counting by the shutoff time counting unit 3. Since the reaching of the extension number limit is notified to the centralized monitoring center via the external communication unit 11, the centralized monitoring center restores the appliance-specific interruption time table set by the extended time in the appliance-specific interruption time holding unit 7. The original classification according to the trend is input from the external communication unit 11, and the cutoff time holding unit 7 by the cutoff time change unit 17.
Of the device-specific shut-off time table is performed.

It is needless to say that the configuration of each embodiment described above can be implemented alone, but the configuration of the first or second embodiment and the configuration of the third embodiment are combined. Can also.

[0043]

As described above, according to the first aspect of the present invention, the cutoff time switching command received by the external communication unit can be held in the cutoff time switching command holding unit in advance. The process of switching the shutoff time in response to a change in usage tendency such as a change in gas usage time due to the above can be sequentially set for each user's gas shutoff device within a period preceding the switching date and time. The switching is executed when the clock section that counts the current date and time reaches the switching date and time. To rewrite the appliance-specific interruption time table in the appliance-specific interruption time holding unit. Therefore, since the setting of the gas cut-off time for the gas cut-off device of each user can be sequentially set in advance without simultaneously changing the gas cut-off time, the safety of gas use can be finely executed.

According to the second aspect of the present invention, the switching date and time of the gas shutoff time and the corresponding classification according to the tendency can be stored in advance in the shutoff time switching data holding unit, and the clock for counting the current date and time can be stored. When the unit has reached the switching date and time, the cutoff time switch change data holding unit outputs a switching command for the trend-based classification, so that the cutoff time change unit stores the trend-based device-specific cutoff time held by the trend-specific appliance-based cutoff time. The appliance-specific interruption time to be changed is taken out of the table, and the appliance-specific interruption time table of the appliance-specific interruption time holding unit is rewritten. Therefore, it is not necessary to switch the setting of the gas shutoff time for each user simultaneously with the change of the season, and only when it is desired to change the switching date and time, the cutoff time switching data holding unit via the external communication unit. Since the data can be rewritten, the monitoring work can be labor-saving, and more detailed measures can be taken, and the safety of gas use can be more reliably ensured.

Further, according to the third aspect of the present invention, when the user is notified of the shutdown before a predetermined time before the counting of the shutdown time by the shutdown time counting unit is counted up, the shutdown time is extended by a request from the user. Since the limit of the number of times is held in the cutoff time extension limit count holding unit, the extension of the cutoff time is limited to a predetermined limit. Therefore, it is possible to eliminate the deficiency in checking the safety of gas use due to the unlimited extension, and to reliably detect the use of the abnormal time.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a gas shutoff device according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a gas cutoff device according to a second embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a gas shutoff device according to a third embodiment of the present invention.

FIG. 4 is a schematic diagram showing a configuration of a gas shutoff device according to the present invention.

FIG. 5 is a block diagram showing a configuration of a gas shut-off device according to a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1a, 1b, 1c Gas shut-off device 2 Use tool estimation part 3 Cut-off time counting part 4 Cut-off valve drive part 5 Cut-off time holding part according to tendency 6, 17 Cut-off time change part 7 Cut-off time holding part for each instrument 8 Shut off Time switching command holding unit 9 Clock unit 11 External communication unit 14 Gas shutoff valve 16 Shutdown time switching data holding unit 18 Shutdown time extension limit count holding unit

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Takashi Tajima, Inventor: Osaka Gas Co., Ltd. 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi, Osaka (72) Inventor Naohiko Fukumoto 4-chome, Hirano-cho, Chuo-ku, Osaka-shi, Osaka No. 1-2, Osaka Gas Co., Ltd. (72) Inventor Masahiro Yasui 4-1-2, Hirano-cho, Chuo-ku, Osaka City, Osaka Prefecture, Osaka Gas Co., Ltd.

Claims (3)

[Claims] 1. A used appliance estimating unit for estimating a corresponding appliance category based on a detected gas flow rate based on a gas usage amount and a gas supply at a continuous use time limit set for each appliance category. A device-specific cut-off time holding unit that holds a device-specific cut-off time, and a device-specific cut-off time holding unit that takes out the device-specific cut-off time of the device-specific category estimated by the used device estimation unit from the device-specific cut-off time holding unit. A gas shutoff time counting unit that outputs a shutoff request signal when the count is counted up, and a shutoff valve driving unit that drives a gas shutoff valve to close the gas shutoff valve by inputting the shutoff request signal. A device-specific shut-off time holding unit that holds a device-specific shut-off time table in which the device-specific shut-off times are changed according to usage trends such as seasons and user circumstances, etc. An external communication unit that receives the switching of the trend division and a command of the switching date and time by communication, a clock unit that measures the current date and time, and a command of the switching and switching date and time of the trend classification received by the external communication unit. A cut-off time switch command holding unit that holds and outputs the trend-based classification switch command when the current date and time matches the switch date and time, and the trend-specific appliance-based cut-off time hold unit when the trend-based switch command is input The cut-off time change of taking out the cut-off time for each appliance of the trend classification identified by the trend-division switching command from the table of cut-off time for each appliance held by the device and rewriting the appliance-specific cut-off time table of the cut-off time holding unit for each appliance. And a gas shut-off device. 2. A used appliance estimating unit for estimating a corresponding category of appliances classified by gas usage based on a detected gas flow rate and a gas appliance, and a gas for continuous use time set for each appliance category. An appliance-specific interruption time holding unit that retains the appliance-specific interruption time that shuts off the supply, and an appliance-specific interruption time that is estimated by the appliance estimation unit and is extracted from the appliance-specific interruption time holding unit. In a gas shut-off device comprising a shut-off time counting unit that counts time and outputs a shut-off request signal when the count is counted up, and a shut-off valve driving unit that drives the gas shut-off valve to close by inputting the shut-off request signal. A device-specific shut-off time holding unit that holds a device-specific shut-off time table that is divided by the trend-specific interrupt time that has changed the device-specific shut-off time according to the usage tendency such as the season or user circumstances; An external communication unit that receives the switching of the trend-based classification and a change command of the switching date and time by communication, a clock unit that measures the current date and time, and the switching date and time of the trend-based cutoff time and the trend-based classification corresponding thereto. The interruption time switching data holding unit that holds and outputs the switching command according to the tendency when the current date and time coincides with the switching date and time, and the switching time holding unit according to the trend when the switching command according to the trend is input. And a cut-off time changing unit for retrieving the device-specific cut-off time identified by the trend-specific switching command from the trend-specific device-specific cut-off time table and rewriting the device-specific cut-off time table of the device-specific cut-off time holding unit. A gas shut-off device characterized by the above-mentioned. 3. A used appliance estimating section for estimating a corresponding appliance category based on a detected gas flow rate based on a gas usage amount, and a gas using a continuous use time limit set for each appliance category. An appliance-specific interruption time holding unit that retains the appliance-specific interruption time that shuts off the supply, and an appliance-specific interruption time that is estimated by the appliance estimation unit and is extracted from the appliance-specific interruption time holding unit. In a gas shut-off device comprising a shut-off time counting unit that counts time and outputs a shut-off request signal when the count is counted up, and a shut-off valve driving unit that drives the gas shut-off valve to close by inputting the shut-off request signal. A device-specific shut-off time holding unit that holds a device-specific shut-off time table that is divided by the trend-specific interrupt time that has changed the device-specific shut-off time according to the usage tendency such as the season or user circumstances; An external communication unit that receives the switching command of the trend-based classification by communication, transmits a notification of immediately before shut-down to the outside, and receives a shut-off time extension command, and a shut-off time extension limit count that holds the shut-off time extension limit count. Holding part,
When a switching command for the trend-based category is input from the external communication unit, the device-specific shutdown time identified by the switching command is extracted from the trend-based device-based shutdown time table held by the trend-based device-based shutdown time holding unit. Rewriting the appliance-specific interruption time table of the appliance-specific interruption time holding unit, and when the interruption time extension command is input from the external communication unit, within the limit number of times that the interruption time extension limit number holding unit holds. A gas shut-off device comprising: a cut-off time changing unit that changes a cut-off time for each appliance held by a cut-off time holding unit for each appliance by a predetermined extension time.