JP3358155B2 - Gas meter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a gas meter.

[0002]

2. Description of the Related Art Generally, a gas meter has various functions for ensuring safety, such as a function of detecting a gas leak or an abnormality of a gas flow rate and warning the same, and a function of further stopping a gas supply in that case. ing. In such a conventional gas meter, a gas leak detector generally detects a gas leak or the like at a downstream side of the gas meter, that is, at a portion near a gas device that consumes gas, for example, a gas leak detecting device called a flow rate minute leak warning device. If gas leakage continues for a long period of time,
It is possible to detect the gas leak and warn of it, or to respond to it and shut off the gas supply.

A gas flow abnormality detecting means in a conventional gas meter includes a gas pipe when the gas pressure change amount at the time of stoppage of gas usage over the gas meter itself and the entire upper and lower pipes is a certain value or less. A pressure-type micro-leakage device that determines that an abnormality has occurred somewhere is used.

[0004] Alternatively, instead of being built in the gas meter main body, it is arranged immediately upstream of the regulator outlet upstream of the gas meter or between the regulator outlet side and the gas meter to detect a pressure change upstream of the gas meter. A pressure sensor installed separately from the gas meter and a shutoff valve controlled by receiving the pressure sensor are used.

[0005]

In a conventional gas meter using a sensor, a shut-off valve, or the like built in the above-described gas meter or disposed upstream of the gas meter, the above-described gas meter has Detection of an abnormality occurring in the gas pipes and regulators before and after the detection and stop of the gas supply at that time can be executed.

[0006] However, other abnormal situations which are considered to be even more dangerous to the user when actually using the gas include other types of gas-burning equipment such as a gas stove and a gas stove generally used in a user's living space. There is also the generation of carbon monoxide and carbon dioxide due to incomplete combustion or insufficiency of ventilation, etc., since these are abnormal situations that occur especially on the user side, for example, such as carbon monoxide poisoning, It can even lead to life-threatening accidents. Carbon dioxide is not as likely to cause poisoning as carbon monoxide, but if its concentration reaches 5% or more, people who smoke it may experience headaches and nausea. It is also known that at a concentration as high as 10% or more, there is a risk that respiratory distress may occur.

For this reason, in a conventional gas use environment, the occurrence of an abnormality such as the incomplete combustion described above is generally detected,
In order to cope with this, various types of gas combustion equipment are provided with devices for closing the shut-off valve and stopping the use of gas. Alternatively, countermeasures such as adopting a large cross-sectional area of an exhaust port or an exhaust duct of a gas combustion device so that exhaust gas from the combustor passes to the outside sufficiently smoothly have been adopted.

However, the provision of the above-described abnormality detection / gas shut-off device, exhaust duct, and the like in each of all the gas combustion devices used in the user's living space is considered as an overall system. Practically, waste is large, and the provision of such an abnormality detection / gas shut-off device itself not only complicates the structure of each gas-burning device, but also causes the gas-burning of each gas-burning device. There is a problem that the manufacturing cost of the device is increased.

Further, in order to avoid the problem of providing an abnormality detection / gas shut-off device for each gas-burning device as described above, separately from the gas-burning device, the gas-burning device may be provided at one place in a living space. Is installed at the location and detects (monitors) the occurrence of abnormalities such as carbon monoxide in the air in the living space intensively at that location,
In addition, an abnormality detection / warning device or the like having a function of issuing an alarm when the abnormality occurs is used.

However, in such an abnormality detection / warning apparatus, it is considered that one apparatus can detect abnormality of all the gas-burning appliances in the living space. Are often separated by a wall surface, when the abnormality detection / warning device or the like is installed at one location as described above, for example, the device is separated from the installation location by a wall surface. When an abnormality such as incomplete combustion occurs in a gas combustion device used indoors, there is a problem that it is almost impossible to accurately and reliably detect the abnormality.

In addition, since the gas is generally generated in one place and then diffuses and spreads in the space, the position where the gas combustion equipment is located is far from the place where the abnormality detecting / warning device is installed. The more the position, the lower the volume concentration of carbon monoxide gas and the like generated by incomplete combustion, etc., and the farther the position where the gas combustion equipment is located is from the abnormality detection / warning device. The more it is, the more difficult it is to detect an abnormality such as carbon monoxide generation due to the incomplete combustion.

Further, since the abnormality of all the gas-fired appliances in the room is detected at only one place as described above, it is possible to detect the occurrence of the abnormality itself. Among the appliances, there is a problem that it is impossible to specify which of the gas combustion appliances has an abnormality.

As a result, there is a problem that even though the occurrence of incomplete combustion is detected, it is not possible to take an appropriate specific measure against it. That is,
When the occurrence of incomplete combustion is detected, the user checks, for example, all the gas-fired devices, and selects a gas-fired device in which it is particularly suspected that incomplete combustion is occurring, and operates the device. The situation must be checked closely. Moreover, it is almost impossible for ordinary users to accurately determine whether such incomplete combustion is suspected or not. in this way,
In the conventional technology, even if it is possible to automatically detect the occurrence of an incomplete combustion or the like, it is fatal that it is not known in which gas combustion equipment the abnormality such as the incomplete combustion occurs. Due to the drawback, there is a problem that it is almost impossible for general users other than specialists to take appropriate measures for the occurrence of the abnormal situation.

Furthermore, since the components of city gas and LP gas generally used for home use contain the above-mentioned carbon dioxide and other oxygen, the gas may be lost even if gas leakage occurs. The above-described phenomenon of the increase in the concentration of carbon dioxide may occur, and the abnormality detection / alarm detecting the abnormality of the gas combustion device by detecting the increase in the concentration of carbon dioxide in the atmosphere in the living space as described above. In the case of equipment, for example, the cause of the detected increase in the concentration of carbon dioxide is
There has also been a problem that it may not be possible to accurately determine whether it is due to a gas leak, abnormal combustion or insufficient ventilation.

The present invention has been made in order to solve such a problem, and monitors the occurrence of an abnormal gas combustion state in various types of gas combustion equipment used in a living space closer to the user than a gas meter. However, if the occurrence of abnormal combustion such as incomplete combustion, or the occurrence of atmospheric abnormality such as insufficient ventilation is detected, the occurrence is warned and information on which gas-burning equipment occurred is also presented. Alternatively, it can be recorded to prevent the occurrence of hazardous situations such as carbon monoxide poisoning, and to identify which gas-burning equipment is in an abnormal situation that may cause such a hazard. It is an object of the present invention to provide a gas meter capable of appropriately coping with the problem.

[0016]

First, a gas meter according to the present invention is installed between an upstream pipe near a gas supply source and a downstream pipe near a gas combustion device that burns and consumes the gas. is, in the gas meter having a gas flow rate measuring means for measuring the flow rate of the gas stream flowing from the upstream pipe side toward to the downstream pipe side, a plurality of the gas burner
An exhaust sensor provided at least one for each of the units, for detecting the concentration of at least one of carbon monoxide and carbon dioxide in the exhaust gas discharged from the gas combustion device, and Concentration
Compared with a predetermined concentration threshold, if the concentration is equal to or higher than the concentration threshold, combustion abnormality occurrence determination means for determining that an abnormality has occurred in the combustion in the gas combustion device; A transmission unit that transmits an electric signal related to the concentration information from the exhaust sensor to the combustion abnormality occurrence determination unit, and when it is determined that the abnormality has occurred in the combustion, the occurrence of the abnormality is determined. Combustion abnormality occurrence alarm means for alarming at least one of an auditory medium and a visual medium; and
If it is determined that the abnormality has occurred,
Which of the gas-fired appliances
Combustion Abnormality Source Announcement to Identify Information
Means .

That is, according to the present invention, one sensor having a simple structure such as a carbon monoxide sensor or a carbon dioxide sensor is provided.
It is possible to monitor the combustion state of the gas detected by each gas combustion device individually with one gas meter, so that only a very simple and low-cost structure is used as a whole. The combustion state of each of the gas combustion devices can be individually and accurately monitored.

That is, conventional abnormality detection installed in one place
/ Multiple gases that were completely impossible with gas shut-off devices
An abnormality has occurred in any of the combustion devices
Of the present invention
Is to be realized by a very simple method and configuration
Can be.

As a result, the occurrence of the combustion abnormality
Ensure that only the specified gas-fired equipment is
It is possible to reliably take measures against abnormal burning. Soshi
If the combustion abnormality is detected by using the technology of the present invention,
But for other normal gas-fired equipment,
There is no need for stoppage, and safe and continuous use as usual
can do.

As a method of presenting information on the abnormal combustion source by the abnormal combustion source indicating means, for example, a number is defined in advance for each of a plurality of gas-fired appliances,
An area for displaying the information of the number of the gas-burning device in which the abnormal combustion has occurred may be arranged on the liquid crystal display panel arranged in front of the gas meter, or the number of the number is indicated by the synthesized voice. You may make it utter.

Secondly, in the gas meter according to the second aspect, when it is determined that the abnormality has occurred in the combustion, the information of the date and time when the abnormality occurred is determined. In addition, the apparatus further includes a combustion abnormality occurrence recording unit that records, as a unit of information, information specifying which of the plurality of gas combustion apparatuses has caused the abnormality. It is a gas meter.

In other words, when an abnormality occurs in the combustion, not only a warning but also a record of the abnormality is made, so that the gas combustion equipment which tends to cause poor combustion can be more reliably specified. can do. As a result, even a general amateur user can easily and reliably take measures, for example, to stop using gas-burning equipment having a record of occurrence of combustion failure many times. Will be able to do it.

Further the third, the gas meter of the present invention, in the gas meter according to any one of the first to third, and gas leakage detection means for detecting the occurrence of a gas leak from the gas burning appliance, the gas leak The gas meter further comprises a gas leak alarm means for alarming the occurrence of the gas leak when is detected.

That is, as a means for detecting a gas leak from a gas combustion device or the like on the user side, a gas leak detecting means such as a flow rate minute leak detecting device may be provided in the gas meter. . Therefore, the gas leak is detected by effectively using such existing gas leak detecting means, etc., and when the gas leak is detected, even if the abnormality is determined by the combustion abnormality occurrence determining means, It can be determined that no abnormal combustion has occurred. However, here, in such a case, the abnormality determination by the combustion abnormality occurrence determination means may be automatically canceled, or the combustion abnormality occurrence determination and the gas leak detection function together,
A so-called fail-safe function may be realized by both of them to detect and deal with the occurrence of a dangerous situation on the user side.

Fourth, the gas meter according to the present invention has the first
The gas meter according to any one of claims 3 to 3 ,
The gas meter further includes a combustion abnormality occurrence record reading unit that reads out and outputs the unit of information recorded in the combustion abnormality occurrence recording unit.

That is, the information recorded in the combustion abnormality occurrence recording means is connected to, for example, a hand-held information reading terminal provided outside the gas meter, read out by the terminal, and read on the terminal. May be displayed on the display means or the like, but as described above, the information is gathered as one set of information for each abnormality occurrence in the combustion abnormality occurrence recording means in one gas meter. From the gas meter, for example, on the liquid crystal display panel screen, etc., record the occurrence of the abnormality (information)
Is desirably displayed. Therefore, for example, a readout button or the like is attached to the gas meter, and when the readout button is depressed, the above-described combustion abnormality occurrence record readout means operates, and the abnormality occurrence record (information ) Can be output by a method such as display.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the gas meter according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram showing a configuration of a main part of a gas meter according to the present invention. FIG. 2 is a diagram schematically showing an example of a case where it is built around a CPU using a microcomputer.

The gas meter includes an upstream piping 101 near a gas 100 supply source and a gas combustion device 2 for burning the gas.
00 (in this embodiment, a plurality of 200a, b,..., N) is installed between the downstream pipe 102 and the gas 100 flowing from the upstream pipe 101 to the downstream pipe 102. Gas flow rate measuring means 30 for measuring flow rate
1. The gas meter according to claim 1, wherein
An exhaust sensor 302 (in this embodiment, a plurality of exhaust sensors 302a, b,...) That detects the concentrations ρ of carbon monoxide and carbon dioxide in the exhaust gas discharged from zero at alternate timings.
n) and the concentration ρ detected by the exhaust sensor 302.
Is compared with a predetermined concentration threshold value ρth. If the concentration ρth is equal to or higher than the predetermined concentration threshold value ρth, the gas combustion device 200 in which the concentration ρ is detected has an abnormality in the combustion. Abnormality determination means 3 for determining
And transmission means 304 for transmitting an electric signal of the information of the concentration ρ from the respective exhaust sensors 302 to the combustion abnormality occurrence determination means 303 (in this embodiment, transmission using a multi-line communication cable). Means), and when it is determined that an abnormality has occurred in the combustion in the gas-fired device 200, an alarm sound is given by the alarm sounding device 308 as an auditory medium for the occurrence of the abnormality, while a visual medium is used. And a combustion abnormality occurrence alarm means 306 for displaying on a display screen of a display means 305 using a liquid crystal display panel to alarm the occurrence of the abnormality.

The gas flow rate measuring means 301 is a conventional gas flow rate measuring means having a structure and a function of measuring the flow rate of the general gas 100. The gas flow rate measuring means 301 further calculates the integration of the gas flow rate, and calculates the gas consumption at that time. Is displayed on the display screen of the display means 305.

Each of the exhaust sensors 302a, b,... N is provided for each of the gas-fired devices 200a, b,. A sensor having a simple structure, such as a sensor element, which can be used at a low cost is used. The combustion state of the gas detected by each of the sensors is individually transmitted to the combustion abnormality occurrence determination means 303 via the transmission means 304. And send it out.

Accordingly, the exhaust gas sensor 30 can be made extremely simple and low-cost as a whole.
The concentration of carbon monoxide and carbon dioxide in the exhaust gas, which is an effective index indicating the combustion state of each of the plurality of gas-fired devices 200a, b,. The combustion state of each of the gas-fired devices 200a, b,... N is accurately and individually monitored by the combustion abnormality occurrence determination means 303 described below and the like, and a dangerous state such as abnormal combustion occurs. If this is done, it can be detected (determined) immediately.

The exhaust sensors 302a, 302b,.
Are respectively provided with gas-fired devices 200a, b,...
Since the purpose of the attachment at n is to monitor the exhaust gas, each of the gas combustion devices 200a, b,
.. N, or in a gas-fired appliance without a specific exhaust port (for example, a gas stove), near the burner and close enough to prevent the sensor from igniting,
Needless to say, it is desirable to attach it.

In this embodiment, a communication cable is used as the transmission means.
If the familiarity with the electrical signal output characteristics of the gas concentration sensor used as b,... n is good, an optical communication cable or the like may be used. Further, in the present embodiment, a liquid crystal display panel is used as the display means 305 as a visual medium indicating that the abnormality has occurred. Such a visual medium may be arranged on the entire surface of the gas meter or on the top of the body. However, since the hardware resources of the display means such as the liquid crystal display panel already used in the gas meter exist, it is clear that it is desirable to use the display means such as the liquid crystal display panel effectively. Therefore, in the present embodiment, such a liquid crystal display panel is used as the display unit 305.

Incidentally, the above-mentioned combustion abnormality occurrence determining means 303
A suitable value as the concentration threshold value ρth used in the above may be set to a concentration slightly lower than a value at which there is a general risk of causing carbon monoxide poisoning, dyspnea due to carbon dioxide, and the like. For example, as an example of carbon dioxide, if the concentration of carbon dioxide in the respiratory gas is about 4%, headache and dizziness frequently occur, and if it is about 6%, the frequency of respiratory surge and dyspnea is high (probability). It is known to occur in. Therefore, in order to avoid the occurrence of such an abnormal situation, the concentration threshold is set to ρth ≧ 3% so that the above-mentioned alarm can be issued with some margin (that is, considering the safety factor). It may be determined as follows.

In the gas meter according to the present embodiment, in addition to the above-described general configuration, when it is determined that a combustion abnormality has occurred in any of the gas combustion devices 200a, 200b,. , N, at a predetermined position on the screen of the display means 305, the information for specifying which of the plurality of gas-fired devices 200a, b,... The apparatus further includes a combustion abnormality occurrence source indicating means 307 to be performed.

That is, the exhaust sensors a, b, c, d,
.. N are assigned in advance an identification number (or information such as a symbol or code that plays an equivalent role). The combustion abnormality occurrence determination means 303 sequentially changes the concentration of carbon monoxide and the concentration of carbon dioxide from each of the exhaust sensors 302a, b,... N at a specific time period (time interval) ΔT. The corresponding electric signal is monitored, and the identification number of the exhaust sensor 302 selected as a monitoring target at this time is always read and held by the combustion abnormality occurrence source indicating means 307. Then, the next time period is reached and another exhaust sensor 30 is used.
When 2 is newly selected, the identification number of the newly selected exhaust sensor 302 is read and newly held. When the occurrence of combustion abnormality is determined by the above-described combustion abnormality occurrence determination means 303, the identification number held at that time is read out, and the identification number or the number or position of the corresponding gas combustion device is read. At a predetermined position on the screen of the display means 305.

In this embodiment, the case where the identification number and the like are displayed on a visual medium such as a screen of the display means 305 has been described. In addition, a synthesized voice uttering device (not shown) or the like may be used. For example, the identification number or the like may be uttered such as "incomplete combustion occurs in the third gas appliance".

The gas meter according to the present embodiment, in addition to the above-described configuration, when it is determined that an abnormality has occurred in combustion, together with information on the date and time when the abnormality occurred in combustion. , The plurality of gas-fired devices 20
Combustion abnormality occurrence recording means 309 for recording information specifying which of the gas combustion devices 200 of 0a, b,...
Is further provided. That is, when an abnormality occurs in the combustion, the occurrence of the combustion abnormality tends to be caused not only by warning, but also by recording the occurrence of the combustion abnormality in the recording by the combustion abnormality occurrence recording means 309. The gas combustion device 200 can be specified more reliably. As a result, even a general user can easily and surely take measures such as stopping the subsequent use of the gas-fired equipment 200 having a record of occurrence of combustion failure many times. Will be able to do it.

It should be noted that the combustion abnormality occurrence recording means 309 in the present embodiment, in more detail, when the combustion abnormality occurs, the gas combustion equipment 2 which is the source of the combustion abnormality
While the information of the identification number of 00 is received from the combustion abnormality occurrence source indicating means 307, the information of the date and time at that time is stored in the combustion abnormality occurrence recording means 309 itself by a clock function or combustion function. It is read out from a clock function provided in the abnormality occurrence determination means 303 or a clock function provided separately in the microcomputer, which will be described later. As a set of so-called one log data, which is used in the combustion abnormality occurrence recording means 309 itself.
-Recording in a storage element (not shown) such as RAM or D-RAM.

The gas meter according to the present embodiment further includes combustion abnormality occurrence record reading means 310 for reading out and outputting the unit of information recorded in the combustion abnormality occurrence recording means 309. That is, it is desirable that the information recorded in the combustion abnormality occurrence recording means 309 can display the abnormality occurrence record (information) on the screen of the display means 305 using a liquid crystal display panel. Therefore, for example, a readout button (not shown) is attached to the gas meter, and when the readout button is pressed, the above-mentioned combustion abnormality occurrence record reading means 309 is activated, and the abnormality occurrence recorded up to that time is recorded. Display (output) the record (information) of

The configuration of the main part of the gas meter according to the present embodiment is not limited to the above-described configurations, but may be different from that of the gas combustion device 20.
Gas leak detecting means 3 for detecting occurrence of gas leak from zero
11 is provided. When a gas leak is detected, an alarm is issued by using the above-mentioned alarm sounding device 308 as a gas leak alarm means 313 for alarming the occurrence of the gas leak. That is, the gas combustion equipment 20 on the user side
When gas leak detecting means 311 such as a pressure-type micro leak detecting device using a pressure sensor 312 is used as a means for detecting gas leak from zero or the like, which is provided inside a gas meter. There is. Therefore, by detecting the gas leak by effectively using the existing gas leak detecting means 311 and the like, if a gas leak is detected, even if the combustion abnormal occurrence determining means 303 determines that the combustion is abnormal, Even if it is performed, it can be determined that it is not a combustion abnormality. However, in such a case, the abnormality determination by the combustion abnormality occurrence determination means 303 may be automatically canceled, or the combustion and combustion abnormality occurrence determination means 303 and the gas leakage detection means 311 may function together. Then, both may detect the occurrence of a dangerous situation beforehand.

It should be noted that the gas flow rate measuring means 301, particularly the information processing to arithmetic circuit part, the combustion abnormality occurrence determining means 303, and the combustion abnormality occurrence alarming means 306, particularly the information processing to arithmetic circuit part, Combustion abnormality occurrence source indicating means 30
7 and a circuit system for performing information processing for specifying the above-mentioned display at a predetermined position on the screen of the display means 305, and a combustion abnormality occurrence record reading means 310. , As shown in FIG.
Needless to say, the CPU 400 can be built around the CPU 400. In FIG. 2, reference numeral 401 denotes a CP.
An I / F circuit that controls an I / F (interface) between the U400 and the outside; a storage element 402 such as an S-RAM or a D-RAM that stores a part of the OS and various data or various application software; A shut-off valve 403 shuts off gas supply when gas leak is detected by the gas leak detecting means 311, a gas flow measuring mechanism 404 for measuring the flow rate of the gas 100 by a fluidic method, for example, 405 A long-life battery for supplying the CPU 400 and the storage element 402 with a power supply voltage and the like for operation and backup of data is shown, respectively.

Next, the operation of the gas meter according to the present invention will be described.
Particularly, the operation of the combustion abnormality determination will be mainly described with reference to FIG. Every time the time period ΔT elapses (Y of s1), the first gas combustion device 200a among the gas combustion devices 200a, b,... N to which identification numbers n = 1, 2,. Are sequentially selected as monitoring targets. At this time, the value of the flag Fn is incremented by one each time monitoring is performed (s2). Here, it is assumed that the i-th gas combustion apparatus 200i is selected (the same applies hereinafter).

Subsequently, the exhaust gas sensor 3 installed in the gas combustion equipment 200i selected as the monitoring target is
02i, the carbon monoxide concentration ρ1 and the carbon dioxide concentration ρ of the exhaust gas discharged from the gas combustion device 200i
2 are sequentially detected (s3). Then, the detected ρ1 and ρ2 are converted into respective density thresholds ρ1th,
and ρ2th (s4).

Here, ρ1 <ρ1th or ρ2 <ρ2
If it is th (N in s4), it is sufficiently valid even if it is determined that the normal combustion is continued, so that a warning state is not generated and the waiting state is continued until the next ΔT elapses. to go into. Alternatively, after that, when a command to read the abnormality occurrence record that has been recorded is input (Y in s5), the abnormality occurrence record is read in accordance with the instruction (s16).

However, here, ρ1 ≧ ρ1th or ρ1
If 2 ≧ ρ2th (Y in s4), the date / time information t at that time is read out (s6).
n = i, that is, the value i of the identification number of the gas combustion device 200i in which the combustion abnormality has occurred is read (s7). On the other hand, the occurrence of the combustion abnormality is alerted by an alarm sound or the like (s8). Further, the read identification number i and its occurrence time t are displayed on the display means 305 as information of a combustion abnormality occurrence source, together with text information (not shown) indicating a warning such as "combustion abnormality occurrence". It is displayed (s9, s10). Further, the information t and i are collectively recorded as one log data (s11).

Subsequently, the warning by the visual or audible medium has been continued after the determination of the occurrence of the abnormality (N in s12), but a warning reset command is issued by a warning reset switch (not shown) or the like. (S1)
2Y), the alarm is reset based on this (s13).

Subsequently, if Fn at that time is equal to the total number n of the gas-fired devices 200 (Y in s14), the monitoring of the gas-fired devices 200 is continued from the first to the last. Since one round has been completed up to the n-th unit, Fn is reset to Fn = 0 (s1
5).

Alternatively, if Fn <n (s14
N), since the monitoring has not been completed yet until the last n-th gas combustion device 200n, the time interval ΔT
At the next monitoring timing, the (i + 1) th gas combustion device 200i + 1 corresponding to the next order of the gas combustion device 200i is selected. Thus the time interval Δ
After T, the next monitoring operation is the above series of operations (s1 to s
The procedure is continued in the same manner as 15).

The operation indicated by s14 may be provided between s1 and s2 instead of the next step after s13. In this case, Fn = 0 is set as the initial value of Fn.
Needless to say, it is only necessary to start counting by.

[0051]

As described above in detail, according to the present invention, the occurrence of abnormalities in the gas combustion state in various types of gas combustion equipment used in a living space closer to the user than the gas meter is considered. If monitoring detects the occurrence of abnormal combustion such as incomplete combustion, or the occurrence of atmospheric abnormality such as insufficient ventilation, it warns of the occurrence and provides information on which gas-burning equipment caused it. Can be presented or recorded to prevent the occurrence of hazardous situations such as carbon monoxide poisoning, and to identify which gas-fired equipment caused such an emergency, and as a result Can be dealt with.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a main part of a gas meter according to the present invention.

FIG. 2 is a diagram schematically showing an example of a case where a configuration of a main part of a gas meter according to the present invention is built around a microcomputer (CPU).

FIG. 3 is a schematic flowchart showing the operation of the gas meter according to the present invention, particularly focusing on the operation of determining abnormal combustion.

[Explanation of symbols]

101: Upstream piping, 102: Downstream piping, 200: Gas combustion equipment, 301: Gas flow measuring means, 302: Exhaust sensor, 303: Combustion abnormality occurrence determining means, 304: Transmission means, 305: Display means, 306 ... Combustion abnormality occurrence alarm means, 307: combustion abnormality occurrence source indicating means, 309: combustion abnormality occurrence recording means, 310: combustion abnormality occurrence record reading means,
311 ... Gas leak detection means, 312 ... Pressure sensor, 31
3. Gas leak warning means

Claims (4)

(57) [Claims] 1. An air conditioner installed between an upstream pipe near a gas supply source and a downstream pipe near a gas-burning device that burns and consumes the gas, from the upstream pipe to the downstream pipe. In a gas meter having gas flow rate measuring means for measuring a flow rate of a flowing gas stream, at least one gas flow measuring device is provided for each of the plurality of gas combustion devices.
Is attached, an exhaust sensor for detecting one of a concentration of at least one of carbon monoxide and carbon dioxide in the exhaust gas discharged from the gas-fired equipment, the concentration detected by the exhaust sensor, predetermined Compared with the concentration threshold, when the concentration is equal to or more than the concentration threshold, combustion abnormality occurrence determination means for determining that an abnormality has occurred in the combustion in the gas-fired device; and A transmission unit that transmits an electric signal of the concentration information to the combustion abnormality occurrence determination unit, and when it is determined that an abnormality has occurred in the combustion,
Combustion abnormality occurrence alarm means for alarming the occurrence of the abnormality in at least one of an auditory medium and a visual medium, and when it is determined that an abnormality has occurred in the combustion,
If the abnormality is any one of the plurality of gas-fired devices,
Presents information that identifies whether or not it occurred in combustion equipment
A gas meter, comprising: a combustion abnormality occurrence source indicating unit that performs the operation. 2. The gas meter according to claim 1, wherein when it is determined that an abnormality has occurred in said combustion,
Along with information on the date and time when the abnormality occurred,
The above-mentioned difference is found in any of the plurality of gas-fired devices.
A single piece of information identifying whether the
Combustion abnormality occurrence recording means for recording information as
A gas meter comprising: 3. The gas meter according to claim 1 or 2,
There are, gas for detecting the occurrence of a gas leak from the gas burning appliance
A leak detecting means for detecting the occurrence of the gas leak when the gas leak is detected.
Gas leak alarm means for alarming
Characteristic gas meter. 4. The method according to claim 1, wherein
In the gas meter, the one set recorded in the combustion abnormality occurrence recording means
Combustion abnormality occurrence record reading and reading information of each
A gas meter, further comprising means.