JP2009168592A - Gas shut-off device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily detect the risk of an abnormality of CO gas generation by lowering a CO gas concentration determination value of a CO gas alarm, when detecting a specific gas appliance. <P>SOLUTION: When detecting the specific gas appliance, a signal is output from an appliance discrimination means 11. When the signal is input, the CO gas concentration determination value of the CO gas alarm 7 is lowered, thereby facilitating furthermore detection of a gas leak. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a gas shut-off device configured to be able to transmit and receive information between a CO gas alarm and a gas meter, and more particularly to a gas shut-off device that can change the operating conditions of an alarm based on information from the gas meter. Is.

  Conventionally, this type of gas shut-off device shuts off gas when an alarm output is output from an alarm (see, for example, Patent Document 1).

FIG. 3 shows a conventional gas shut-off device described in the publication. As shown in FIG. 3, it is composed of an alarm device 7 that gives an alarm when gas is detected and a gas shut-off device 1. In the figure, 6 is an alarm control means, 8 is a detection signal transmission means for transmitting a signal to the gas shut-off device when the gas concentration reaches an alarm level, 9 is a detection means for detecting gas, and 10 is an alarm. This is an alarm output means.
Japanese Patent Laid-Open No. 6-139486

  However, in the configuration of the conventional example, the gas leak judgment level of the gas alarm is a constant value even when a plurality of unprecedented new gas appliances are used or a specific gas appliance is used. It was judged by. Therefore, when an added gas appliance or a specific gas appliance generates a gas leak due to an initial failure or a defective second-hand product, the gas leak cannot be detected at an early stage and the danger may not be avoided. Had.

  The present invention solves the above-described conventional problems, and is configured so that information can be transmitted and received between a CO gas alarm and a gas meter, and is used in an indoor open state by using an instrument discrimination function of the gas meter. When it is detected that a specific gas appliance is used, the detection sensitivity is increased by changing the CO gas concentration judgment value of the CO gas alarm to a lower level, and there is a risk of occurrence when using the specific gas appliance. An object of the present invention is to provide a gas shut-off device capable of quickly detecting the danger of a certain CO gas.

  In order to solve the above-described conventional problems, the shut-off device of the present invention is a gas shut-off device configured to be able to transmit and receive a CO gas alarm installed at an appropriate place in a room and a gas meter having a shut-off function, The CO gas alarm device includes a detecting means for detecting a CO gas concentration, an alarm transmitting / receiving means for inputting a signal for changing a judgment value for judging CO gas generation abnormality and outputting an alarm signal, and a judgment value change. An alarm control unit configured to determine a CO gas generation abnormality by setting a determination value according to the signal and comparing the detected value with a detection value; and an alarm output unit for informing at the time of CO gas generation abnormality, the gas meter corresponding to the flow rate A flow rate detection means for outputting the detected signal, a control means for calculating an instantaneous flow rate value for each predetermined period based on the detection signal, and the instantaneous flow rate value associated with time series as a flow rate pattern and stored in advance. Device discriminating means for discriminating the appliance to be used in comparison with the flow pattern for each appliance, and gas meter transmission / reception for outputting a signal for changing the CO gas concentration judgment value of the alarm device according to the appliance discrimination result and inputting an alarm signal Means and a shut-off means for opening and closing the gas flow path, and the control means detects the use of the specific gas instrument by the instrument discriminating means and receives a specific instrument detection signal via the gas meter transmitting / receiving means. A judgment value change signal is transmitted, and the alarm control means sets a CO gas concentration judgment value according to the judgment value change signal received by the alarm transmission / reception means.

  According to the above invention, when it is detected that a specific gas appliance used in an indoor open state is detected by the appliance discrimination function using the flow rate information of the gas meter, the CO gas concentration determination of the CO gas alarm is performed. By changing the value in the direction of decreasing the value, the detection sensitivity can be increased, and the danger of CO gas that may be generated when the specific gas appliance is used can be quickly detected, thereby improving safety.

  The gas shutoff device of the present invention detects the CO gas of the CO gas alarm when detecting that a specific gas appliance used in an indoor open state is used by the appliance discriminating function using the flow rate information of the gas meter. By changing the concentration judgment value so as to decrease, the detection sensitivity can be increased, and the danger of CO gas that may be generated when the specific gas appliance is used can be quickly detected, thereby improving safety.

  A first invention is a gas shut-off device configured to be capable of transmitting and receiving a CO gas alarm installed at a proper place in a room and a gas meter having a shut-off function, wherein the CO gas alarm is configured to control a CO gas concentration. Detection means for detecting, alarm signal transmitting / receiving means for inputting a signal for changing a judgment value for judging CO gas generation abnormality and outputting an alarm signal, and a judgment value corresponding to the judgment value change signal are set and detected value An alarm device control means for determining a CO gas generation abnormality in comparison with, and an alarm output means for informing at the time of CO gas generation abnormality, the gas meter, a flow rate detection means for outputting a detection signal according to the flow rate, Control means for calculating the instantaneous flow rate value for each predetermined period based on the detection signal, and using it in comparison with the instrument-specific flow rate pattern that is input as a flow rate pattern in association with the instantaneous flow rate value in time series An instrument discriminating means for discriminating the instrument, a gas meter transmitting / receiving means for outputting a signal for changing the CO gas concentration judgment value of the alarm device according to the instrument discriminating result and an alarm signal, and opening and closing the gas flow path The control means detects the use of the specific gas appliance by the appliance discriminating means and transmits a judgment value change signal via the gas meter transmission / reception means when the specific appliance detection signal is inputted, and the alarm The device control means sets the CO gas concentration judgment value in accordance with the judgment value change signal received by the alarm transmission / reception means.

  And it is possible to easily detect that a specific gas appliance is used by the appliance discrimination function using the flow rate information of the gas meter, and to detect that a specific gas appliance used in an indoor open state is used. Then, the detection sensitivity is improved by changing the CO gas concentration judgment value of the CO gas alarm to a lower level, and it becomes possible to quickly detect the danger of CO gas that may occur when using a specific gas appliance. Can be increased.

  The second invention is characterized in that, in particular, the control means in the first invention sets a judgment value change signal in accordance with a specific instrument detection signal input for each specific gas instrument determined by the instrument determination means. It is what.

  And since it is possible to set the CO gas concentration judgment value of the alarm device corresponding to a specific gas appliance, such as a gas appliance that is used in an indoor open state, such as an instantaneous water heater or a gas stove, abnormal CO gas generation can be set. When the use of specific gas appliances that are likely to occur, such as instantaneous water heaters or gas stoves, is determined, the detection sensitivity can be increased by changing the alarm gas CO gas concentration judgment value to a lower level. It is possible to provide a gas shut-off device with improved performance.

According to a third aspect of the invention, in particular, in the first aspect of the invention, there is provided instrument information input means capable of inputting instrument information from the outside, and the control means is a judgment value change signal according to the instrument information input from the instrument information input means. This is characterized in that it is set.

  And since the instrument information can be input from the outside, the usage information of the specific instrument can be input to the control means instead of the instrument discrimination function of the gas meter, so the CO gas concentration judgment value of the alarm device can be set as necessary. It is possible to provide a gas shut-off device that can be changed and takes into consideration the balance between safety and usability.

  According to a fourth aspect of the invention, in particular, in the first to third aspects of the invention, when the control means cannot confirm the alarm signal before the predetermined period elapses after transmitting the judgment value change signal, the control means returns the judgment value to the pre-change judgment value. It is characterized by that.

  Even when the determination value is changed with the use of the specific gas appliance, the determination value is returned to the original state when it is determined that there is no abnormality such as generation of CO gas for a predetermined period. It is possible to prevent misjudgment due to noise and minor abnormality due to the increase, and it is possible to improve usability while ensuring safety.

  A fifth invention is a program for causing a computer to function as all or part of the gas shut-off device according to any one of the first to fourth inventions.

  And since it is a program, at least one part of the program of this invention is easily realizable using a general purpose computer or a server. Also, program distribution and installation can be simplified by recording on a recording medium or distributing a program using a communication line.

  Since the present invention can achieve the object of the present invention by making the main parts of the first to fourth inventions into embodiments, the details of the embodiments corresponding to each claim will be described below with reference to the drawings. The description will be given with reference to the best mode for carrying out the present invention.

  Note that the present invention is not limited to the present embodiment. Further, in the description of each embodiment, the same configuration and the same function and effect are given the same reference numerals, and redundant description will not be given.

(Embodiment 1)
FIG. 1 is a block diagram of a gas cutoff device according to Embodiment 1 of the present invention.

  In FIG. 1, a gas meter transmission / reception means 5 of a gas meter 1 constituting a gas shut-off device has an alarm signal receiving means 5b for receiving an alarm signal output from a CO gas alarm device 7, and the CO gas alarm device 7 generates CO gas. When an alarm signal transmitted when an abnormality is determined is received, the content is output to the control means 2. The flow rate detection means 4 detects the gas flow rate and outputs a detection signal corresponding to the flow rate to the control means 2. The control means 2 composed of a microcomputer and its peripheral circuit calculates an instantaneous flow rate value for each predetermined period by inputting a detection signal from the flow rate detection means 4, and performs various processes based on the calculated flow rate data, for example, a fixed period. The calculation of the integrated flow rate value, the flow pattern associated with the time series, the determination of abnormal flow rate and abnormal use, etc. are executed. When the abnormality is determined, control is performed so that the gas supply is shut off via the shut-off means 3, and when the abnormality is released, the gas supply is resumed.

Further, the control unit 2 outputs the flow rate value calculated by the flow rate detection unit 4 to the appliance discrimination unit 11 as a flow rate pattern associated with time series. The appliance discriminating means 11 compares the flow rate pattern stored in association with the time series with the pre-stored flow rate pattern for each appliance, discriminates the gas appliance to be used based on the characteristic flow rate information, and determines the predetermined specification. Gas appliances that need to be used with caution, such as instantaneous water heaters and gas stoves that are used in an indoor open state, are determined.

  In addition, the discrimination of the gas appliance in the appliance discriminating means 11 not only discriminates a predetermined specific gas appliance but also a gas appliance that has not been used so far or a gas appliance that has been used so far. It is also used in the case of determining whether

  In the determination result, when it is determined that a specific gas instrument that needs to be used with caution is used, the specific instrument detection signal is output from the instrument determination unit 11 to the control unit 2. When the specific instrument detection signal is input, the control means 2 derives a predetermined determination value change signal according to the input specific instrument detection signal, and sends it to the determination value change signal transmission means 5a of the gas meter transmission / reception means 5. Output. The output judgment value change signal is transmitted to the alarm transmitter / receiver means 8 via the judgment value change signal transmission means 5a.

  The judgment value change signal received by the judgment value change signal receiving means 8a of the alarm transmission / reception means 8 is output to the alarm control means 6, and the CO gas concentration judgment value set conventionally by the alarm control means 6 is obtained. The CO gas concentration determination value is changed according to the determination value change signal.

  In this way, when a specific gas appliance that needs to be used with caution is used, it is detected by the CO gas detecting means 9 by changing the CO gas concentration judgment value of the CO gas alarm device 7 in the direction of decreasing. The detection sensitivity of abnormal CO gas generation is increased, and it is possible to quickly detect the risk of CO generation that occurs when using a specific gas appliance, for example, an appliance used in an indoor open state such as an instantaneous water heater or gas stove. When the CO gas generation abnormality is detected, the alarm control means 6 notifies the alarm signal output means 10 via the alarm signal output means 10 and transmits the alarm signal to the alarm signal receiving means 5b of the gas meter 1 via the alarm signal transmission means 8b. The supply of gas is stopped through the means 3 to improve safety.

  The determination value change signal is different depending on the type of the specific gas appliance discriminated by the appliance discriminating means 11, for example, different judgment value change signals are transmitted between the instantaneous water heater and the gas stove. Even when the determination is made, the determination value change signal varies depending on the type of the gas appliance, and the determination value change signal varies even when a plurality of appliances including the specific gas appliance are used at the same time. In this way, by changing the CO gas concentration judgment value of the CO gas alarm 7 finely according to the usage environment of the gas appliance to be used, it is easy to generate an appliance requiring attention such as an instant water heater or a gas stove. The risk of abnormal CO gas generation can be detected quickly.

  Further, in the above embodiment, as a method for confirming the installation status of the specific gas appliance that needs to be used with caution, a flow rate pattern associated with the flow rate value calculated by the flow rate detection means 4 in time series is preliminarily used. A device discriminating means 11 is provided for comparing the stored gas flow patterns for each appliance and discriminating the gas appliance to be used based on the characteristic flow rate information. As another method, the appliance information is input from the outside. Possible appliance information input means 12 is provided, and the control means 2 sets a determination value change signal in accordance with the appliance information input from the appliance information input means 12, so that any gas appliance is installed in the home. It is also possible to determine whether or not a specific gas appliance that needs to be used with caution is installed.

Further, a specific instrument detection signal is sent from the instrument discrimination means 11 or the instrument information input means 12 to the control means 2, and a determination value change signal corresponding to the specific instrument detection signal is derived by the control means 2, and a determination value change signal transmission means When the CO gas concentration determination value is changed according to the determination value change signal transmitted from 5a to the gas alarm transmission / reception means 8 of the CO gas alarm 7 and received by the determination value change signal reception means 8a, the control means 2 Counts a predetermined period of time, and detects a CO gas generation abnormality with the CO gas concentration determination value changed until the timing is completed. If no CO gas generation abnormality is detected during this fixed period, the CO gas concentration determination value is returned to the original determination value when the fixed period has elapsed, and monitoring is continued as a normal CO gas generation abnormality detection condition. In addition, when CO gas generation abnormality is detected during this fixed period, an alarm signal is output to the alarm output means 10 of the CO gas alarm device 7 for notification. Then, when the abnormal state of CO gas generation is improved by this notification processing, the CO gas concentration judgment value is kept changed for a certain period, and when a CO gas generation abnormality is not detected during the certain period, a certain period of time has passed. At that time, the CO gas concentration determination value is returned to the original determination value, and monitoring is continued as a normal CO gas generation abnormality detection condition.

  Next, a program for executing the control flow stored in the control means 2 in the first embodiment will be described with reference to FIG.

  In FIG. 2, the control means 2 determines whether or not a specific instrument detection signal has been received from the instrument discrimination means 11 (S1). If there is no reception, the process proceeds to S6. A flag is set (S2), the instrument detection counter is cleared to zero (S3), and a determination value change signal is derived for changing the CO gas concentration determination value of the CO gas alarm 7 in a direction to decrease based on a predetermined condition. (S4), a judgment value change signal for setting a new CO gas concentration judgment value is output to the judgment value change signal transmission means 5a of the gas meter transmission / reception means 5, and to the judgment value change signal reception means 8a of the alarm transmission / reception means 8. Transmit (S5). In S6, it is determined whether or not the specific instrument detection flag is set. If it is not set, the process ends. If it is set, the process proceeds to S7. In S7, an appliance detection counter indicating how much time has passed since the new CO gas concentration determination value has been changed is incremented, and it is determined whether the appliance detection counter is equal to or greater than a predetermined value (S8). If the value is less than the predetermined value, the process is terminated. If the value is equal to or larger than the predetermined value, the CO gas concentration determination value of the CO gas alarm 7 is changed so as to return to the original determination value (S9). And a newly determined determination value is output to the determination value change signal transmitting means 5a and transmitted to the determination value change signal receiving means 8a (S10), the instrument detection counter is cleared to zero (S11), and the specific instrument is detected. The flag is reset (S12), the process is terminated, and the flow proceeds to the flow rate detection means again.

  As described above, in the present embodiment, it is possible to prevent the CO gas concentration detection level threshold from being lowered too much by detecting a specific gas appliance and lowering the CO gas concentration detection level threshold only for a predetermined period. It is possible to prevent false alarms caused by the threshold value being too low.

  In each of the above embodiments, the control flow is executed by causing the microcomputer to function with the program stored in the control means, but it is also possible to execute it with hardware instead of the program. Further, the transmission method of each signal of the gas shut-off device and the alarm device can be applied to any of a wired method, a wireless method, and a combination of a wired method and a wireless method.

  As described above, the gas shut-off device according to the present invention can be realized by transmitting each signal of the gas meter and the alarm device, and therefore can be applied to a system in which each signal is concentrated and controlled at a relay point.

The block diagram of the gas cutoff device in Embodiment 1 of this invention Flow chart showing the operation of the gas shutoff device Block diagram of a conventional gas shut-off device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gas shut-off device 2 Control means 3 Shut-off means 4 Flow rate detection means 5 Gas meter transmission / reception means 5a Judgment value change signal transmission means 5b Alarm signal reception means 6 Alarm device control means 7 CO gas alarm device 8 Alarm device transmission / reception means 8a Judgment value change signal Reception means 8b Alarm signal transmission means 9 Detection means 10 Alarm output means 11 Appliance discrimination means

Claims (5)

A gas shut-off device configured to be able to transmit and receive a CO gas alarm installed at a proper place in a room and a gas meter having a shut-off function,
The CO gas alarm device includes a detecting means for detecting a CO gas concentration, an alarm transmitting / receiving means for inputting a signal for changing a judgment value for judging the CO gas concentration and outputting an alarm signal, and a judgment value changing signal. An alarm control means for determining a CO gas generation abnormality by setting a determination value according to the detected value and comparing it with a detection value; and an alarm output means for informing at the time of CO gas generation abnormality,
The gas meter includes a flow rate detection unit that outputs a detection signal corresponding to a flow rate, a control unit that calculates an instantaneous flow rate value for each predetermined period based on the detection signal, and inputs the instantaneous flow rate value in time series as a flow rate pattern. In addition, an appliance discriminating means for discriminating an appliance to be used in comparison with a flow rate pattern for each appliance stored in advance, a signal for changing the CO gas concentration judgment value of the alarm device according to the appliance discrimination result, and an alarm signal A gas meter transmission / reception means for inputting and a shut-off means for opening and closing the gas flow path,
The control means detects the use of the specific gas appliance by the appliance discriminating means, and when the specific appliance detection signal is input, transmits a determination value change signal via the gas meter transmission / reception means,
The gas shutoff device in which the alarm control means sets a CO gas concentration judgment value according to the judgment value change signal received by the alarm transmission / reception means. The gas shut-off device according to claim 1, wherein the control means sets a determination value change signal in accordance with a specific instrument detection signal input for each specific gas instrument determined by the instrument determination means. Provide equipment information input means that can input equipment information from the outside,
The gas shut-off device according to claim 1, wherein the control means sets a determination value change signal in accordance with the appliance information input from the appliance information input means. The gas shut-off according to any one of claims 1 to 3, wherein the control means returns the judgment value before the change to the judgment value before the change when the alarm signal cannot be confirmed before the predetermined period elapses after the judgment value change signal is transmitted. apparatus. The program which makes a computer function as all or one part of the gas interruption | blocking apparatus of any one of Claims 1-4.

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