JPH0749858B2 - Gas shutoff device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas shutoff device that automatically shuts off a gas passage when an abnormality occurs to prevent an accident such as an explosion or poisoning caused by city gas or propane gas. It is about.

2. Description of the Related Art An example of a conventional gas shutoff device will be described with reference to FIGS. As shown in FIG. 2, a gas meter 2, a flow rate measuring means 3 for issuing a signal according to the amount of gas passing through the gas meter, and a shutoff means 4 for stopping the gas supply are provided in the middle of the gas supply path 1. The control unit 5 is provided to judge the use state from the flow rate signal of the measuring means 3 and to judge that it is abnormal when it deviates from the gas proper use condition which is set and stored in advance and issues a closing signal to the shut-off means 4.

FIG. 3 shows an example of the configuration of this conventional control unit. Those having the same reference numerals as those in FIG. 2 are components having the same function. The control unit 5 receives the flow rate signal from the flow rate measuring unit 3 and detects the usage state of the gas, and the initial condition setting that sets appropriate usage conditions in advance according to the number of the gas meter. Section 7, a gas proper use condition setting section 8 for storing the setting contents and sending a reference signal to the abnormality judging section 9, and a closing signal output for issuing a closing signal to the breaking means 4 in response to a signal from the abnormality judging section 9. It is composed of part 10 and.

Here, the proper use conditions indicate items such as total flow rate, individual maximum flow rate, and safety continuous use time set according to the capacity of each gas meter. The total flow rate is the total gas flow rate that passes through the gas meter within the specified measurement period, and if the current total flow rate exceeds the specified value that was initially set when the gas hose was pulled out or the gas appliances burned out, the shutoff means was activated. Let
The individual maximum flow rate is the maximum gas consumption among the various gas appliances currently in use by detecting the change in the gas flow rate for each predetermined measurement period, and identifying how much gas consumption each has. When the amount exceeds the set value, a shut-off signal is output to the shut-off means to deal with gas leaks such as cracks in the gas hose and burning out when the gas plug is half-opened. Further, the safe continuous use time is a continuous use time set for each range based on the statistical data of the time when a gas appliance in a certain combustion range is continuously used, and the data from the use state detection unit 6 is the above-mentioned. When the set time is exceeded, an operation signal is sent to the shut-off means 4 to ensure safety even when the gas appliance is forgotten to be turned off.

Problems to be Solved by the Invention However, in the configuration as described above, the gas proper use condition is uniformly determined only by the initial value depending on the capacity of the gas meter installed in the gas pipe. There was a problem that it was not possible to properly satisfy all special conditions, the presence or absence of gas appliances used, and the usage conditions according to the season.

The present invention solves such a conventional problem, and automatically measures the flow rate pattern of the gas actually used in each home for a predetermined period by the temperature determination signal of the temperature condition determination unit, and at the same time, matches the actual condition of each home. It is possible to provide a safer gas shutoff device by resetting the determination conditions. In addition, by determining whether or not the temperature obtained by the temperature detection unit satisfies a predetermined condition, and if the temperature is satisfied, a temperature determination signal is output to measure the flow rate pattern at that time and simultaneously match the season. Judgment conditions can be set from the next fiscal year onward, and a highly safe gas shutoff device can be provided.

Means for Solving the Problems In order to solve the above problems, the gas shutoff device of the present invention is
A flow rate measuring unit that is provided in the gas supply path and emits a signal according to the amount of passing gas, a use state detecting unit that detects the use state of gas by the flow rate signal sent from the flow rate measuring unit, and detects the temperature of outside air Temperature detecting means for determining whether the temperature obtained by the temperature detecting means satisfies a predetermined condition, and if the temperature is satisfied, a temperature condition determining section for outputting a temperature determination signal according to the detected temperature. A timer activation determination unit that receives the temperature determination signal output from the temperature condition determination unit and outputs a timer activation signal only in the first year; a timer unit that counts a predetermined time by the timer activation signal; and the timer unit. A usage status storage unit that stores a gas usage status according to a signal from the usage status detection unit during operation, and a gas proper usage condition according to the contents of the usage status storage unit A gas proper use condition change storage unit for changing / storing, a gas proper use condition storage storage unit for storing the stored contents of the gas proper use condition change storage unit in a predetermined storage storage unit according to the temperature determination signal, and a gas An initial condition setting part that sets appropriate usage conditions as initial values in advance,
The temperature determination signal is used to compare the initial conditions of the initial condition setting unit with the gas proper use conditions stored according to the same temperature determination signal in the first year stored in the gas proper use condition memory storage, and to use the proper gas. A gas proper use condition setting unit that sets conditions, an abnormality determination unit that determines whether there is an abnormality by comparing the signal of the use state detection unit and the gas proper use condition of the gas proper use condition setting unit, and the abnormality When the determination unit determines that there is an abnormality, a closing signal output unit that outputs a closing signal, and a shutoff unit that shuts off the gas passage according to the closing signal from the closing signal output unit are provided.

Effect of the Invention With the above-described configuration, the present invention starts the flow rate monitoring under the condition set in the initial condition setting unit at the beginning of installation in each home, then detects the outside air temperature, and judges the temperature condition when the predetermined condition is satisfied. Temperature determination signal is output from the unit, the temperature determination signal is received, the timer activation signal is output from the timer activation determination unit only in the first year, the timer unit is activated, and counting of the predetermined period starts The operation of the part measures the gas usage pattern during the timer counting period. That is, during this period, the measured values such as the total flow rate, individual maximum flow rate, and safety continuous use time are updated, and the measurement data is sent to the gas proper use condition change storage section at the same time when the timer count ends, It is stored as usage condition data. Then, the gas is stored in a predetermined storage storage unit in the gas proper use condition storage storage unit according to the temperature determination signal.

Initial conditions are set in the first year of installation, but from the second year onward, the data in the gas proper use condition storage unit and the initial condition data stored according to the same temperature judgment signal in the first year are used by the temperature judgment signal. And the predetermined gas proper use condition is set.

Embodiment A gas shutoff device according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a gas shutoff device according to an embodiment of the present invention. In FIG. 1, 3 is a flow rate measuring means for issuing a signal according to the flow rate of the passing gas in the gas meter, 6 is a usage state detecting section for inputting the flow rate signal from the flow rate measuring means 3 and detecting the usage state of gas, 11 Is a temperature detecting means for detecting the temperature of the outside air, 12 is a temperature condition determining section for determining whether or not the temperature obtained from the temperature detecting means satisfies a predetermined condition, and if it is satisfied, outputting a temperature determination signal, 13 Is a timer start determination unit that receives the temperature determination signal output from the temperature condition determination unit and outputs a timer start signal only in the first year,
14 is a timer unit that counts a predetermined time by the timer start signal, 15 is a use state storage unit that stores a gas use state by a signal from the use state detection unit 6 while the timer unit 14 is operating, and 16 is a use state memory The proper gas usage condition change storage unit 17 changes and stores the proper gas usage conditions according to the contents of the unit 15, and 17 stores the stored contents of the proper gas usage condition change storage unit 16 according to the temperature determination signal. A proper gas usage condition storage unit to be stored in 7 is an initial condition setting unit for setting gas usage conditions as initial values in advance, 18
Is compared with the initial conditions of the initial condition setting unit 7 and the gas proper use conditions stored according to the same temperature determination signal in the first year in the gas proper use condition memory storage unit 16 by the temperature determination signal from the next year onward. The gas proper use condition setting part for setting the gas proper use condition to be used for, 9 compares the signal of the use state detection part 6 with the gas proper use condition of the gas proper use condition setting part 17 to judge the presence or absence of abnormality. The abnormality determination unit 10, 10 is a closing signal output unit that outputs a closing signal according to the abnormality signal of the abnormality determination unit 9, and 4 is a shut-off unit that shuts off the gas passage by the closing signal from the closing signal output unit 10.

In the gas circuit breaker configured as described above, when the gas circuit breaker is installed in each home, the initial conditions set in the initial condition setting unit 7 are set to the gas proper use condition setting unit in the first year.
It is set to 18, and the abnormality determination section 9 compares the signal from the usage state detection section 6 with the initial condition to monitor the presence or absence of flow rate abnormality.
When it is determined that there is an abnormality, the closing signal output unit 10 outputs a closing signal to the shutoff means 4 to shut off the gas passage. In the gas proper use condition setting unit 18, the gas proper use condition storage unit 17
The use condition stored in the memory is compared with the initial condition and the smaller value is set.
Since the maximum value is stored in 17, the initial conditions are always set in the gas proper use condition setting unit 18.

Further, in the first year, after the gas shutoff device is installed, the outside temperature is detected by the temperature detecting means 11 and a predetermined condition (here, the temperature condition means that the outside air temperature at a certain time of the day is a predetermined temperature. When it becomes), it is determined whether or not
If the temperature is satisfied, the temperature determination signal is output, the temperature determination signal is received, and the timer activation determination unit outputs the timer activation signal only in the first year. The timer unit 11 is activated by the timer start signal and starts counting for a predetermined period. At the same time, the usage state storage unit 14 displays the gas usage pattern from the usage state detection unit 6, that is, the total flow rate, the individual maximum flow rate, and the safe continuous usage time. The data is stored, and when the timer count for a predetermined period ends, the data of each gas use pattern actually measured in the gas proper use condition change storage unit 16 is changed to the proper use condition and stored. Then, the stored contents of the gas proper use condition change storage unit are stored in a predetermined storage unit in the gas proper use condition storage unit 17 according to the temperature determination signal when the timer unit 11 is operated.

After the next fiscal year, the gas is stored according to the temperature determination signal in the gas proper use condition setting unit 18 according to the initial condition of the initial condition setting unit 7 and the same temperature determination signal of the first year in the gas proper use condition storage unit 17 The gas proper use condition was compared, the gas proper use condition to be actually used was set, and the signal from the use state detector 6 in the abnormality determination unit 9 and the gas proper use condition setting unit were set as in the first year. The proper gas usage conditions are compared and monitored for abnormal flow rates. When it is determined that there is an abnormality, the closing signal output unit 10 outputs a closing signal to the shutoff means 4 to shut off the gas passage.

For example, the temperature conditions are summer temperature ( _TH ) and winter temperature ( _TL ).
It is assumed that the two patterns are set. If the first temperature judgment signal after the gas shutoff device is installed is output during the period from winter to summer, the outside temperature has reached the summer temperature (T _H ), and the gas proper use condition setting unit 18 The gas proper use condition storage unit 17 compares the gas proper use condition at the summer temperature with the initial condition of the initial condition setting unit 7, and sets the smaller one in the gas proper use condition setting unit 17 as the gas proper use condition. However, in the first year, since the maximum value is stored in the gas proper use condition storage unit 17, the initial condition is set in the gas proper use condition setting unit 18. Also, the timer section
14 Measured gas usage pattern during summer in the usage status storage section 15 obtained during operation is changed / stored as the gas usage condition by the gas proper usage condition change storage section 16 after the timer count is finished, and the gas proper usage condition storage is stored. It is stored in the storage part at the summer temperature (T _H ) in part 17.

Next, if the second temperature determination signal is output during the period from summer to winter, the outside temperature has become the winter temperature (T _L ), and the gas proper use condition setting unit 18 stores the gas proper use condition storage. The proper gas use conditions at the winter temperature in the storage unit 17 and the initial condition of the initial condition setting unit 7 are compared, and the smaller one is set in the gas proper use condition setting unit as the gas proper use condition. Since the maximum value is stored in the gas proper use condition storage storage unit 17, the initial condition is set in the gas proper use condition setting unit 18. Further, the measured gas usage pattern in the winter period by the usage status storage unit 15 obtained while the timer unit 14 is operating is changed and stored as the gas proper usage condition by the gas proper usage condition change storage unit 16 after the timer count is finished,
And the winter temperature (T _L ) in the gas proper use condition storage storage unit 17
It is stored in the storage part at the time.

After the next fiscal year, when the temperature judgment signal is output and the summer temperature (T _H ) is reached, the appropriate gas usage condition setting unit 18 sets the summer temperature of the summer temperature stored in the appropriate gas usage condition storage unit 17 in the first year. The appropriate gas use condition at that time and the initial condition of the initial condition setting unit 7 are compared, and the smaller one is set as the gas proper use condition, and the abnormality determination unit 9 detects the signal from the usage state detection unit 6 as in the first year. The proper gas usage set by the proper gas usage condition setting unit 18 is compared, and the presence or absence of flow rate abnormality is monitored. When it is determined that there is an abnormality, the closing signal output unit 10 outputs a closing signal to the shutoff means 4 to shut off the passage. Winter temperature ( _TL )
In the case of, the gas proper use condition setting unit 18 compares the gas proper use condition at the winter temperature stored in the gas proper use condition storage unit 17 at the winter temperature with the initial condition of the initial condition setting unit 7,
The smaller one is set as the proper gas usage condition, and the following is monitored for abnormal flow rate at summer temperature.

That is, this gas shutoff device detects the temperature of the outside air,
By determining whether the detected temperature meets the specified temperature condition, and if it meets the specified temperature, a specified temperature judgment signal is output to automatically set the most suitable gas usage condition at that time in each household. , Gas usage will be monitored.

In the embodiment, the temperature is divided into the summer temperature and the winter temperature (the set temperature is set in two patterns), but the set temperature of the temperature condition is finely set, and the gas proper use condition storage unit is provided. By increasing the number of storages corresponding to the number of each set temperature, it is possible to set gas usage conditions more suitable for each season (season), and to provide a more appropriate and safe gas shutoff device.

EFFECTS OF THE INVENTION As described above, the gas shutoff device of the present invention determines whether the conventional gas shutoff device detects the outside air temperature and whether the temperature obtained by the temperature sensing device satisfies a predetermined condition. However, if satisfied, a temperature condition determination unit that outputs a temperature determination signal according to the detected temperature, a timer unit that counts a predetermined time only in the first year by the temperature determination signal, and the use state detection unit while the timer unit is operating. From the signal from the use state storage unit that stores the gas use state, the gas proper use condition change storage unit that changes and stores the gas proper use condition according to the contents of the gas proper use condition storage unit, and the gas proper use A gas proper use condition storage unit that stores the stored contents of the condition change storage unit in a predetermined storage unit according to the temperature determination signal, and the gas proper use condition is set as an initial value in advance. The initial condition setting unit to be set according to the temperature determination signal, and the initial condition of the initial condition setting unit and the gas proper use condition stored according to the same temperature determination signal of the first year of the gas proper use condition storage unit. By setting the gas proper use condition setting unit that compares the gas use conditions and sets the gas proper use condition to be used, in comparison with simply setting the condition that is uniformly determined by the capacity (number) of the gas meter, The actual gas usage pattern in each season is actually measured, and based on the gas usage pattern in the same period of the first year, it is set every year as an appropriate gas usage condition for the season (time) of the year. Under a wide range of gas usage conditions, the gas usage status can be monitored and an abnormality can be judged.When an abnormality occurs, the gas supply is stopped by the operation of the shut-off means, so there is a risk of gas explosion or gas poisoning. It is possible to increase further the safety for the prevention of the scan accident.

Regarding the setting of gas proper use conditions, the temperature judgment signal is output according to the conditions set in the temperature condition judgment unit,
As a result, each home will automatically be set to the proper gas usage conditions suited to the time of use.

[Brief description of drawings]

FIG. 1 is a block diagram of a gas shutoff device according to an embodiment of the present invention, FIG. 2 is a block diagram of a conventional gas shutoff device, and FIG. 3 is a block diagram of a conventional gas shutoff device. 11 ... Temperature detection means, 12 ... Temperature condition determination unit, 13 ... Timer activation determination unit, 14 ... Timer unit, 15 ... Use state storage unit, 16 ... Gas proper use condition change storage unit, 17 ... … Gas proper use condition memory storage unit, 18 …… Gas proper use condition setting unit.

Claims (1)

[Claims] 1. A flow rate measuring means which is provided in a gas supply path and which emits a signal according to the amount of passing gas, and a usage state detecting section which detects a usage state of gas by a flow rate signal sent from the flow rate measuring means, A temperature detecting means for detecting the temperature of the outside air, and it is determined whether or not the temperature obtained by the temperature detecting means satisfies a predetermined condition, and if the temperature is satisfied, a temperature determination signal corresponding to the detected temperature is output. Temperature determination unit, a timer activation determination unit that receives the temperature determination signal output from the temperature condition determination unit and outputs a timer activation signal only in the first year, and a timer unit that counts a predetermined time by the timer activation signal. A usage status storage unit that stores a gas usage status according to a signal from the usage status detection unit while the timer unit is operating; Gas proper use condition change storage unit for changing and storing as a use condition, and gas proper use condition storage storage unit for storing the stored contents of the gas proper use condition change storage unit in a predetermined storage storage unit according to the temperature determination signal. And an initial condition setting unit that sets gas proper use conditions as initial values in advance, and the temperature determination signal from the next fiscal year onward makes the same initial condition of the initial condition setting unit and the first year in the gas proper use condition storage unit. Comparing the gas proper use condition stored according to the temperature determination signal, the gas proper use condition setting unit for setting the gas proper use condition to be used, the signal of the use state detection unit and the gas proper use condition setting unit An abnormality determination unit that compares the gas proper use conditions to determine whether there is an abnormality, a closing signal output unit that outputs a closing signal when the abnormality determination unit determines that there is an abnormality, and the closing Gas cutoff apparatus provided with a blocking means for blocking the gas passage in accordance with a closing signal from the signal output unit.