JP4151367B2 - Gas security system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gas security system that measures a gas flow rate and shuts off a gas passage when an abnormal flow rate is measured to ensure safety in using the gas.
[0002]
[Prior art]
In recent years, if a gas meter that measures the amount of gas used has been measured for a large flow rate or if it has been used for a long period of time that is not normal, it is judged as abnormal and the gas passage is shut off. The one with a built-in security device to ensure the safety is widespread. These determine the judgment value of the cutoff operation from the flow rate of gas flowing in the daily gas meter.
[0003]
And the apparatus which transmits / receives information as radio | wireless data between this gas meter and the center which manages gas is put in practical use.
[0004]
Also, in gas equipment, products that control the equipment main body wirelessly from a remote controller have been commercialized.
[0005]
However, despite the use of the same gas, these products operate individually and have not been operated as a system that is linked to each other.
[0006]
[Problems to be solved by the invention]
However, although the judgment value of the shut-off operation is determined by monitoring the gas flow rate in the daily gas meter, another operation state that occurred within a certain period and did not occur within that period occurred. In this case, the microcomputer meter cuts off the gas even though the gas equipment is operating normally, or the minute gas flow rate is leaked or the gas is not used. There was a problem that it was not possible. In addition, when a gas device is replaced or added, there is a problem that the gas is interrupted for a while after the installation.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, in the present invention, the state information of the gas equipment is taken into the microcomputer meter, so that the cutoff determination value of the microcomputer meter can be determined more in accordance with the actual use state.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The gas security system according to the first means of the present invention includes a plurality of gas using devices, a wireless unit provided in each of the gas using devices, and wirelessly transmitting operation state information of the gas using devices as data, and the wireless In the gas safety system comprising a microcomputer meter that receives operation state information data from each unit, the microcomputer meter receives the operation stop information from all the gas use devices that constitute the gas safety system, and When the detection of the gas flow rate pulse is received from the wireless unit, the detection of the gas flow rate pulse is not recognized .
[0009]
Thereby, the microcomputer meter can judge gas leak correctly.
[0022]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0023]
(Example 1)
FIG. 1 is a block diagram showing a gas security system according to the means of the present invention.
[0024]
Reference numeral 1 denotes a microcomputer meter mainly composed of a gas flow rate measuring unit, a gas passage blocking device, and a control unit. 2 is a gas using apparatus. A communication unit 3 transmits various state information of the gas using device 2 to the microcomputer meter 1 as data.
[0025]
According to the first means of the present invention, when the gas using device 2 is in the operation stop state, the information is transmitted to the microcomputer meter 1 through the communication unit 3. Even when a plurality of gas using devices are installed on the downstream side of the gas managed by one microcomputer meter, stop information is transmitted to the microcomputer meter 1 when each of them is in an operation stop state.
[0026]
As a result, when the microcomputer meter 1 measures the gas flow rate at a time when it can be recognized that all of the gas use devices installed on the downstream side are in a stopped state, if there is a gas flow rate, the microcomputer meter 1 It is possible to accurately determine that there is a gas leak point in the gas path up to or in the gas device itself.
[0027]
(Example 2)
According to the second means of the present invention, the wireless unit 4 that converts the operating state information of the gas using device 2 as wireless data and transmits it to the microcomputer meter 1 is installed in all the gas using devices on the downstream side of the microcomputer meter. Like that.
[0028]
As a result, it is not necessary to install terminals for receiving data of a plurality of gas-using devices in one microcomputer meter, and wiring work and wiring itself can be eliminated.
[0029]
(Example 3)
According to the third means of the present invention, in the state where, for example, three gas use devices 2A, 2B and 2C having different capacities are installed on the downstream side of the microcomputer meter 1, the amount of gas used during operation is the device 2A>. In the order of the device 2B> the device 2C, the device 2A and the device 2B transmit the operation stop information, and the device 2C transmits the information that the device 2C is operating to the microcomputer meter 1.
[0030]
Thereby, even if it is the minimum gas consumption pattern of the installed gas apparatus, the microcomputer meter 1 can recognize that it is a very small flow rate use without judging gas leakage and shutting off the gas.
[0031]
Even if the information that the device 2C is in operation is not transmitted, the operation of the devices 2A and 2B is stopped after the microcomputer meter recognizes that the devices 2A, 2B, and 2C are installed in advance. You may make it judge the driving | operation of apparatus 2C only by information.
[0032]
Example 4
According to the fourth means of the present invention, in the state where, for example, three gas use devices are installed on the downstream side of the microcomputer meter 1, the gas use amount of each gas use device during the maximum operation is determined. It is transmitted to the microcomputer meter 1 whether it is performing with% ability.
[0033]
As a result, the microcomputer meter 1 can recognize the maximum gas consumption pattern of the installed gas equipment, and even if the flow rate greatly increases due to seasonal changes, etc., it will be judged as an abnormal flow rate and erroneously shut off. You don't have to.
[0034]
(Example 5)
According to the fifth means of the present invention, when a gas using device 2D is newly installed on the downstream side of the microcomputer meter 1, the installed gas using device 2D immediately transmits device information to the microcomputer meter 1. The device information may simply be a new device or may relate to the characteristics of the device such as the gas usage capacity. Then, the microcomputer meter 1 that has received this information recognizes that a new gas using device 2D has been added, and newly enters the learning mode without using the gas consumption pattern accumulated so far.
[0035]
As a result, when the gas meter 2D is newly installed and the gas usage greatly changes, the microcomputer meter 1 does not accidentally shut off the gas until it is recognized that the learning program needs to be changed. You can start relearning immediately.
[0036]
(Example 6)
According to the sixth means of the present invention, when a gas using device installed on the downstream side of the microcomputer meter 1, for example, 2C is newly replaced or simply removed, the microcomputer meter 1 stores information data for a certain period of time. Since it cannot be received, the removal of the gas using device 2C is recognized, and the re-learning mode is entered so as to change the judgment value of the gas cutoff.
[0037]
As a result, even if the gas equipment already installed is removed and the gas usage is reduced, the judgment value is not changed from the actual usage and there is not enough room, and the appropriate judgment value is immediately restored. Learn and cut off accurately.
[0038]
(Example 7)
According to the seventh means of the present invention, when, for example, three gas use devices 2A, 2B, and 2C are installed on the downstream side of the microcomputer meter 1, the respective operation stop information is confirmed, and the three devices operate. When it can be determined that the flow is stopped, even if the detection of the flow rate pulse can be confirmed, this is not taken in and ignored.
[0039]
As a result, it is possible to eliminate gas pressure fluctuations and deviations in the gas flow meter readings due to impact.
[0040]
The above embodiment assumes the installation of about three gas-using devices, but of course the same can be done for other quantities.
[0041]
【The invention's effect】
As apparent from the above description, the gas security system of the present invention provides the following effects.
[0042]
Since the microcomputer meter can recognize that the gas use equipment connected downstream of the microcomputer meter is in a shutdown state, it is sure that there is a gas leak if there is a flow rate by detecting the gas flow rate at this time. Will be able to judge.
[0043]
Since the microcomputer meter can receive the operation state information of the gas using device as wireless data, it is not necessary to install terminals for connecting a plurality of gas using devices on the microcomputer meter, and wiring can be eliminated.
[0044]
And, with a plurality of gas using equipment installed, the microcomputer meter can recognize that the equipment with the minimum gas consumption is operating alone, so it will erroneously block the use of a minute flow rate as a minute leak Nothing will happen.
[0045]
In addition, the maximum gas consumption of the installed gas appliances can be realized by the microcomputer meter being able to recognize how much of each of the gas appliances is operating within the maximum operating capacity with multiple gas appliances installed. The pattern can be recognized, and even if the flow rate increases significantly due to seasonal changes, etc., it is judged that the flow rate is abnormal, and it is not necessary to perform a false shut-off.
[0046]
When a new gas equipment is added, it is possible to start learning again immediately by sending the equipment information to the microcomputer meter immediately after installation, so it is necessary to change the learning program. The gas will not be shut off by mistake during the period.
[0047]
When the gas equipment already installed is newly replaced or simply removed, the microcomputer meter recognizes the removal of the gas equipment and immediately re-learns to determine the proper shutoff judgment value. Therefore, even if there is a change in the installation situation, it can always be accurately shut off.
[0048]
Further, since the microcomputer meter can recognize that the operation of the gas using device is stopped, the meter value deviation of the gas flow rate can be eliminated by ignoring the flow rate pulse generated at that time.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a gas security system according to a first embodiment of the present invention. FIG. 2 is a block diagram showing a gas security system according to a second embodiment of the present invention. FIG. 3 is a gas security system according to a third embodiment of the present invention. FIG. 4 is a block diagram showing a gas security system in a fourth embodiment of the present invention. FIG. 5 is a block diagram showing a gas security system in a fifth embodiment of the present invention. FIG. 6 is a sixth embodiment of the present invention. FIG. 7 is a block diagram showing a gas security system according to a seventh embodiment of the present invention.
1 microcomputer meter 2 gas use equipment 2A gas use equipment 2B gas use equipment 2C gas use equipment 2D gas use equipment 3 communication unit 4 wireless unit

Claims (1)

A plurality of gas use devices, a wireless unit that is provided in each of the gas use devices and wirelessly transmits operation state information of the gas use device as data, and a microcomputer meter that receives operation state information data from each of the wireless units In the gas security system, the microcomputer meter has received the detection of the gas flow rate pulse from any one of the wireless units in a state where the operation stop information has been received from all the gas using devices constituting the gas security system. If so, a gas security system that does not recognize the detection of the gas flow pulse .

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