JP2003194331A - Gas apparatus evaluation unit and gas meter having gas apparatus evaluation function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas apparatus evaluation unit for deciding on the apparatus to deal with a gas flow change with at least one apparatus in operation and on the apparatuses to deal with gas flow changes with a plurality of gas apparatuses in operation. <P>SOLUTION: The unit has: a flow pattern table wherein a series of gas flow patterns to occur following combustion control of a plurality of gas apparatus types are divided into partial flow patterns which are then classified for each control step; an apparatus table wherein gas apparatuses are combined with partial flow patterns corresponding to them; and an apparatus evaluation means. The apparatus evaluation means extracts, out of the flow pattern table, a gas flow pattern matching a gas flow pattern accompanying a prescribed flow increase detected with at least one gas apparatus in operation or a partial flow pattern matching a gas flow pattern accompanying a prescribed flow increase detected with a plurality of gas apparatuses in operation, and also extracts, out of the apparatus table, a gas apparatus in operation, or with its operation just started, with its pattern which matches the extracted partial flow pattern. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas appliance determination device which is installed in a gas supply line to each home and is used for a gas meter having a gas flow meter. Gas appliance determination device capable of According to the gas appliance determination device of the present invention, it is possible to provide a more advanced security function or service corresponding to the gas appliance by specifying the operated gas appliance. In particular, the gas appliance determination device of the present invention determines, based on a flow rate increase change during operation of at least one gas appliance, a gas appliance in operation that has caused the flow rate increase change or a gas appliance newly started to operate. To do. Further, the gas appliance determination device of the present invention determines, on the basis of a decrease in flow rate during operation of a plurality of gas appliances, a gas appliance in operation that has caused the decrease in flow rate or a gas appliance that has been stopped.

[0002]

2. Description of the Related Art At the entrance of the gas supply line to each home,
A gas meter with a built-in gas flow meter is installed. The gas meter measures the gas flow rate passing through the gas supply line, and the measured gas flow rate is used to calculate the billing gas charge on a regular basis. In addition to the basic function of measuring the gas flow rate, such a gas meter has a security function of interrupting the gas supply when an abnormal state occurs. According to this security function, gas is shut off by the shut-off valve provided in the gas flow path of the gas meter in response to detection of an abnormal operation state such as an earthquake or gas leak or forgetting to turn off the equipment.

FIG. 1 is a diagram showing a safe continuous operating time set value used for shutting off when the safe continuous operating time is over, which is one of the security functions. This function considers that some abnormal operating condition such as gas leakage has occurred if the gas flow rate is detected and then continued to be used for a long period of time. It is a function to shut off gas. As shown in FIG. 1, a large water heater with a large gas flow rate will be continuously operated for about 30 minutes at most, while a stove with a small gas flow rate will be continuously operated for a long time. As a premise, the safe continuous operation time is set short when the gas flow rate is large, and the safe continuous operation time is set long when the gas flow rate is small.

When the gas flow rate is generated or changed, the gas meter determines that the operation of some gas appliance is started, measures the time for which the flow rate continues, and measures the safe continuous operation time shown in FIG. If the flow rate exceeds the above, the gas is cut off for safety reasons. Therefore, the safe continuous operation time is shut off based on the flow rate of the used gas without specifying the gas appliance in operation.

[0005]

However, as shown in FIG. 1, in a small gas flow rate range, a stove that is operated for a relatively long time and a different gas appliance such as a stove or a small water heater that is operated for a relatively short time are provided. Exists. Since the conventional gas meter cannot identify the gas appliance in operation, the safe continuous operation time is set to be long according to the stove that has been operating for a long time. with this,
For stoves and small water heaters, safe continuous operation time was not always optimal. Therefore, if the gas meter can discriminate the gas appliance in operation, it is convenient because a security function suitable for the gas appliance can be provided.

Conventionally, various proposals have been made to determine a gas appliance in operation from the gas flow rate detected by a gas meter. For example, Japanese Patent Application Laid-Open No. 3-236513 proposes to combine the information from the flow rate change recognizing means of the gas meter with season information and the like to determine the type of gas appliance by fuzzy inference. However, the discrimination logic is extremely vague and unrealistic. Therefore, the conventional gas appliance determination method cannot determine the operating gas appliance with high accuracy, and can be used to provide the optimum security function and other services depending on the determination result. There wasn't.

Further, since the number of gas appliances to be operated is not limited to one, it is necessary to judge the gas appliance when a plurality of gas appliances are operated at the same time. For example, when an increase in gas flow rate is detected while at least one gas appliance is in operation, in this case, a new gas appliance has started operation or an operating gas appliance has an increase in flow rate. It is necessary to determine whether or not the gas appliance is specified. On the contrary, when the gas flow rate decrease change is detected while the plurality of gas appliances are in operation, it is determined whether the gas appliance that has been operated is stopped or the operating gas appliance has the flow rate decrease change. It is necessary to identify and determine the gas appliance.

Therefore, an object of the present invention is to provide a gas appliance determination device and a gas meter having the same, which can determine a gas appliance with high accuracy.

Further, it is an object of the present invention to provide a gas appliance determination device and a gas meter having the same, which can determine a gas appliance corresponding to a change in gas flow rate during operation of at least one gas appliance. .

It is another object of the present invention to provide a gas appliance determination device and a gas meter having the same, which can determine a gas appliance corresponding to a change in gas flow rate during operation of a plurality of gas appliances.

[0011]

In order to achieve the above-mentioned object, the present invention uses a complicated series of gas for judging the gas appliance in operation from the change of the gas flow rate when the gas appliance is operated. We introduce the concept of partial flow rate pattern in which the change in flow rate is divided for each combustion control step. For a plurality of types of gas appliances that may be operated, partial flow patterns are classified for each control step and registered in the flow pattern table. Furthermore, combinations of partial flow rate patterns corresponding to a plurality of types of gas appliances are registered in the appliance table. Then, a partial flow rate pattern that matches the gas flow rate pattern detected by the gas flow meter is extracted from the flow rate pattern table, and a gas appliance that matches the combination of the extracted partial flow rate patterns is extracted from the appliance table.

That is, according to the present invention, a complicated series of gas flow rate patterns associated with combustion control of a gas appliance is simplified into partial flow rate patterns divided for each control step to facilitate matching with the detected gas flow rate pattern. , Enables the determination of gas appliances. As a result, not only a gas appliance that is operated independently, but also a gas appliance that responds to an increase in gas flow rate changes while at least one gas appliance is operating, and a gas appliance that responds to a decrease in gas flow rate during operation of multiple gas appliances The instrument can also be determined.

The flow rate pattern table and the appliance table may be realized by a single table in which partial flow rate patterns are associated with each other for gas appliances.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. However, such an embodiment does not limit the technical scope of the present invention,
The invention extends to the inventions described in the claims and their equivalents.

FIG. 2 is a schematic configuration diagram of the gas meter according to the present embodiment. The gas meter 10 is installed in the middle of the gas supply pipes 12 and 14, and the gas supply pipe 14 on the downstream side is installed.
Is connected to one or a plurality of gas appliances 18A, B, C installed in the customer's house 16. The gas appliance is, for example, a water heater, a fan heater, a table stove, or the like.

The gas meter 10 receives a flow rate signal from a gas flow rate detecting means 20 provided in the gas flow path, a gas cutoff valve 22, a gas pressure sensor 34, and a gas flow meter to measure an integrated gas amount. In addition, it further has a gas meter control unit 24 that determines a gas appliance in operation and performs a security function corresponding to the gas appliance. The gas meter control unit 24 is realized by, for example, a microcomputer in which a control program is installed. Accordingly, the battery 26 is connected to the gas meter control unit 24.

Further, in the gas meter 10, a gas amount display section 28 for displaying the measured integrated gas amount, a seismoscope 30 for detecting occurrence of an earthquake, and notifying the remote center of the integrated gas amount. A communication unit 32 for receiving the control of the gas cutoff valve from the monitoring center corresponding to the security function is provided. Other than that, various sensors and actuators are provided.

The gas flow rate detecting means 20 in the present embodiment is not a membrane type flow meter which outputs a pulse signal when a constant volume of gas flows, which has been widely used in conventional gas meters, but is 2 seconds or less. It is a flow meter capable of detecting the instantaneous gas flow rate at intervals of. For example, it is preferable to use an ultrasonic flowmeter that sends out ultrasonic waves bidirectionally along the gas flow path, detects the gas flow velocity from each propagation time, and outputs an instantaneous gas flow signal from the relationship with the cross-sectional area of the gas pipe. . Other than that, even with a fluidic meter that generates a Karman vortex in a gas flow and detects the flow velocity from its vibration frequency, or even with a membrane flow meter, the pulse signal interval is narrower than before.
A pulse signal may be output at intervals of seconds or less.
Alternatively, it may be a hot wire type flow meter that detects that the temperature distribution from the hot wire has changed according to the gas flow rate.

By using the gas flow meter capable of detecting the instantaneous gas flow rate at a relatively short interval as described above, the waveform of the gas flow rate with respect to time can be detected more accurately. Enables determination of gas appliances based on patterns.

FIG. 3 is a schematic diagram for explaining the operation of the gas meter of this embodiment. In FIG. 3, the gas meter has three operation modes: a normal determination mode, a new registration mode, and an operation monitoring mode. The gas meter determines an operating gas appliance in a normal determination mode or a new registration mode, and implements a safety function (gas cutoff, alarm output, etc.) suitable for the specified gas appliance in an operation monitoring mode. In order to execute the above three operation modes, the gas meter has a flow pattern table, a new device table, and a registered device table.

The flow rate pattern table 50 stores partial flow rate patterns obtained by dividing a series of gas flow rate patterns generated by combustion control, classified for each control step.
Therefore, the partial flow patterns of as many or all possible gas appliances as possible are pre-analyzed and the partial flow patterns are sorted by control step and stored in the flow pattern table 50.

The new appliance table 52 preferably stores all the gas appliances available to the customer and the combinations of the partial flow rate patterns corresponding thereto in association with each other. Therefore,
The gas meter at each customer's house is the same as the new appliance table 52.
Have.

On the other hand, the registered instrument table 54 is
A gas appliance used for each customer and a combination of the partial flow rate patterns corresponding thereto are stored in association with each other.
As will be described later in detail, the registered appliance table 54 extracts the gas appliance used at the customer's house from the new appliance table 52 by a predetermined process (new registration mode), and extracts the extracted gas appliance. It is created by registering the combination of the partial flow rate patterns corresponding thereto in the registered instrument table 54. Therefore, the registered instrument table 54
Is a different table for each gas meter (each customer).

When the gas meter detects the gas flow rate, the gas meter makes a gas appliance determination based on the registered appliance table in the normal determination mode, and when an appliance matching the appliance registered in the registered appliance table is extracted, the appliance is handled. Switch to the operation monitoring mode. When the matching appliance cannot be extracted, the operation shifts to the new registration mode, gas appliance determination is performed based on the new appliance table, and when the matching appliance is extracted, the operation monitoring mode is entered.

The gas meter control unit for realizing each of the above-mentioned operations will be described below, and each operation mode,
Each table will be described in more detail.

FIG. 4 is a block diagram of the gas meter control unit in this embodiment. Since the gas meter control unit 24 is realized by a microcomputer, its configuration is a ROM in which a control program is stored.
And a RAM for temporarily storing data and an ALU for executing a control program. However, FIG. 4 shows each module of the control program and the data structure stored in the ROM or the RAM.

The gas flow rate signal S20 output from the gas flow meter every two seconds or less, for example, has information on the instantaneous gas flow rate and is stored in the memory 42 for each time.
Further, the gas flow rate integration module 40 uses the gas flow rate signal S2
The gas flow rate of 0 is integrated and the display signal S28
Is output. Therefore, the gas flow rate integration module 40
Realizes the basic functions of the gas meter.

The gas meter of the present embodiment can determine from the change in the gas flow rate during operation of the gas appliance connected to the gas pipe in the customer's house. The gas appliance determination module 43 has such a gas appliance determination function. The gas appliance determination module 43 is a control step determination module 44 that determines each control step from the detected gas flow rate pattern (flow rate waveform with respect to time), and a part that extracts a partial flow rate pattern from the gas flow rate waveform divided for each control step. It has a flow rate pattern extraction module 46 and a matching module 48 for extracting a matching gas appliance from the flow rate pattern table 50 and the new appliance table 52 or the registered appliance table 54 based on the partial flow pattern.

In the gas meter of this embodiment, in the normal gas appliance determination process (normal determination mode), the gas appliance is determined based on the registered appliance table 54, and the gas appliance cannot be extracted from the registered appliance table 54. In the new registration mode, a gas appliance is determined by referring to the new appliance table 52 and registered in the registered appliance table 54.

The control step determination module 44 analyzes the waveform of the gas flow rate stored in the memory 42 at regular time intervals and determines the change in the combustion control step of the gas appliance. That is, in the present embodiment, the detected gas flow rate pattern is matched with a pre-registered partial flow rate pattern in units of partial flow rate patterns obtained by dividing a series of gas flow rate patterns generated by the combustion control of gas appliances. . Therefore, it is necessary to determine which control step the detected gas flow rate pattern currently corresponds to. Therefore, the control step determination module 44 determines which control step of the combustion control corresponds to where in the gas flow rate waveform with respect to the time stored in the memory 42.

The partial flow rate pattern extraction module 46 is
The detected gas flow rate pattern is divided for each control step determined by the control step determination module, and the characteristic data of the divided partial flow rate pattern is extracted. The feature data of the partial flow rate pattern is an index used for pattern matching, and is a flow rate waveform characterized by time and flow rate, as will be described in detail later. Therefore, the partial flow rate pattern extraction module 46 extracts the characteristic data from the recorded gas flow rate waveform. This characteristic data is used by the matching module 48 for matching with the partial flow rate pattern.

The matching module 48 searches the flow rate pattern table 50 and extracts a partial flow rate pattern in the flow rate pattern table 50 that matches the partial flow rate pattern extracted from the detected gas flow rate. That is, using the characteristic data of the partial flow rate pattern described above as an index, a matching one of the partial flow rate patterns registered in advance is extracted for each control step. Further, the matching module 48 refers to the registered appliance table 54 to extract the gas appliance that matches the combination of the partial flow rate patterns extracted from the flow rate pattern table.

In that case, more preferably, it is also determined whether or not the detected gas flow rate corresponds to the flow rate value of each gas appliance in the registered appliance table 54. Only a combination of partial flow patterns may match multiple gas appliances,
The gas flow rate value is also preferably used to identify the working gas appliance from the plurality of gas appliances.

As described above, the gas appliance determination module 4
When the gas appliance 3 can identify the gas appliance, the operation monitoring module 56 can execute the operation monitoring mode and execute the optimum security control for the identified gas appliance.
The most typical security control is a safety continuous operation time (time limit) over cutoff function by a specified gas appliance. That is, the operation monitoring module 56 monitors whether or not the specified gas appliance has continued to operate by exceeding the safety continuous operation time set for each gas appliance, and when the operation is over,
The shutoff signal S22 is output to shut off the gas shutoff valve or output an alarm. Therefore, the operation monitoring can be performed based on the safety continuous operation time optimally set for each gas appliance, instead of setting the safety continuous operation time depending on the gas flow rate as in the conventional case.

On the other hand, the matching module 48 may not be able to extract the gas appliance from the registered appliance table 54. For example, in the initial state in which nothing is registered in the registered appliance table 54, or after the gas appliance used by the customer is registered in the registered appliance table 54, the customer additionally purchases a new gas appliance. This is the case. In such a case, the matching module 48 identifies the new gas appliance from the new appliance table 52, and registers the combination of the identified gas appliance and its partial flow rate pattern in the registered appliance table 54 (new registration mode ( (See below)).

The gas flow rate pattern, partial flow rate pattern, flow rate pattern table, new instrument table, and registered instrument table will be described in detail below.

FIG. 5 is a diagram showing an example of gas flow rate patterns in a plurality of gas appliances. In FIG. 5, (1) a hot-water supply side burner of a water heater which is a large-scale water heater (hereinafter referred to as a water heater (hot water supply)), (2) a small water heater, and (3) a bath-fired burner of a water heater (hereinafter referred to as a water heater ( Bath heating),
A series of gas flow rate waveforms generated by the combustion control of (4) fan heater, (5) gas stove, and (6) table stove are shown. In all the gas flow rate waveforms, the horizontal axis represents time and the vertical axis represents gas flow rate, and ignition time A, initial transition period B, and stable period C are shown as control steps.

FIGS. 6, 7 and 8 are diagrams showing examples of partial flow rate patterns during ignition, during initial transient, and during stable period. Figure 5
The gas flow rate patterns of the respective gas appliances shown in FIG. 6 will be described, and also examples of the partial flow rate patterns shown in FIGS.

The gas flow rate pattern of the water heater (hot water supply) shown in FIG. 5 (1) is such that during ignition A, the gas flow rate is controlled to be the optimum gas flow rate for ignition, so that slow ignition is performed and the gas flow rate for slow ignition is maintained for a predetermined period. After that, the feedforward and feedback control is started with the maximum gas flow rate Qmax (or any gas flow rate).
Eventually, a stable period C in which the gas flow rate is constant while the gas flow rate converges is reached. Initial transition period B between ignition time A and stable period C
Then, although the way of changing the gas flow rate differs depending on the feedforward control and the feedback control of the water heater,
In this example, the first pattern is such that the maximum input amount Qmax (or an arbitrary gas flow rate) is vertically fluctuated and converges to a constant flow rate in a stable period. Other than that, the second pattern that gradually decreases from the maximum input amount Qmax (or any gas flow rate) and converges to a constant flow rate in the stable period,
There is a third pattern that gradually increases from an arbitrary gas flow rate different from the maximum input amount Qmax and converges to a constant flow rate in the stable period.

In the partial flow rate pattern at the time of ignition in FIG. 6, the above-mentioned mild ignition pattern A-1 is shown. That is, in the slow ignition pattern A-1, the state of the ignition gas flow rate Q1 corresponding to 70 to 90% of the maximum gas flow rate Qmax at the time of ignition continues for a predetermined time t, and thereafter, the maximum gas flow rate Qmax (or an arbitrary gas flow rate Q2). ) Is changed. That is, when the water temperature is low,
When the maximum input is used, heating is performed rapidly, and hot water at the set temperature can be controlled in a short time. Further, when the water temperature is not low, the flow rate is controlled to a controlled arbitrary gas flow rate.

Therefore, the characteristic data of the slow ignition pattern A-1 is that the predetermined time t during which the slow ignition gas flow rate Q1 continues once is
Within the range from 0.5 seconds to 10 seconds (0.5sec ≦ t ≦ 10s
ec), the slow ignition gas flow rate Q1 is the maximum gas flow rate Q
Within 70 to 90% of max (Q1 = K (n / 3) Qmax, 0.
7 ≦ K ≦ 0.9). However, the maximum gas flow rate Qmax differs depending on the number n of the slowly ignited burners. If there are three burners and all three are ignited during slow ignition (n = 3), Q1 = KQmax and 2
When only surface is ignited (n = 2), Q1 = K (2/3)
If Qmax and only one surface is ignited (n = 1), then Q1 =
Either K (1/3) Qmax. When the burner has two sides, Q1 = KQmax or Q1 = K (1 /
2) Qmax. If there is only one burner, Q1 = KQm
It is ax. Furthermore, the maximum input amount Qmax differs depending on the capacity of the water heater (No. 16, No. 20, No. 24, No. 32, etc.).

Further, in the partial flow rate pattern in the initial transition period of FIG. 7, the first pattern B-1 which converges to a constant flow rate Q3 while hunting up and down from the maximum gas flow rate Qmax (or an arbitrary gas flow rate) described above. And a second pattern B-2 that gradually decreases from the maximum gas flow rate Qmax (or an arbitrary gas flow rate) to a constant flow rate Q3, and gradually increases from an arbitrary gas flow rate Q2 to a constant flow rate Q3. A third pattern B-3 is shown.

Further, the partial flow rate pattern in the stable period of FIG. 8 shows the pattern C-1 in which the above-mentioned constant gas flow rate is maintained. In this stable period, as long as the amount of water used for hot water supply is constant, a substantially constant gas flow rate Q3 is maintained, but since feedforward and feedback control is maintained, the flow rate slightly fluctuates above and below the gas flow rate Q3. Become a pattern.

Returning to FIG. 5, (2) CF using an exhaust stack
In the flow pattern of a BF type hot bath or a balanced type BF type hot bath that does not require an exhaust pipe, the ignition time A becomes a pilot ignition pattern, and then a stable period C of a constant flow rate does not occur after the initial transition period. Move. At ignition time A, the pilot is first ignited, producing a very small gas flow for the pilot burner. The duration of this small amount of gas flow is about 3 seconds or more, and then the gas flow becomes a gas flow corresponding to the number of burner surfaces, and the burner ignites. In the stable period C, the output of the CF bathtub or the BF bathtub is controlled not by the control using the proportional valve but by the surface switching of the burner. Therefore, stable period C
In, the gas flow rate is constant, but can be switched stepwise by switching the burner surface. The example of FIG. 5B is an example of a two-sided burner. Further, after the burner is extinguished after the stable period C, the gas flow rate of only the pilot igniter is consumed. Further, in another CF type bathtub or BF type bathtub, direct ignition may occur at the time of ignition. In that case, the maximum gas flow rate Q2 rises directly at the time of ignition.

A flow pattern as shown in FIG. 5 (2) is generated not only in the CF bathtub or the BF bathtub, but also in a small water heater.

The ignition pattern A-2 is shown in the partial flow rate pattern at the time of ignition in FIG. With this igniting pattern A-2,
During the first few seconds (about 3 seconds or more), a small gas flow rate Q1 for pilot (60 Kcal / h ≦ Q1 ≦ 400 Kcal / h) is maintained, and thereafter, the maximum gas flow rate Qmax (or an arbitrary gas flow rate Q2) is increased. Gas flow Q1 of the igniter burner
Is much smaller than the gas flow rate Q1 at the time of slow ignition. Further, FIG. 6 also shows a fixed flow rate ignition pattern A-3, which is a flow rate pattern that rises to the maximum gas flow rate Qmax (or an arbitrary gas flow rate Q2) in a short time (about 1 second). is there. Further, a constant pattern C-2 is shown in the partial flow rate pattern in the stable period in FIG. There is a burner surface switching control, but otherwise constant flow rate Q3
Therefore, the partial discharge pattern in the stable period corresponds to the constant pattern C-2.

The (3) hot water supply device (bath reheating) in FIG. 5 is a gas flow pattern when the reheating heating burner that heats and circulates the hot water in the bathtub is burned. Similar to the water heater (hot water supply), a gas flow pattern for slow ignition is generated at the time of ignition A, and then maintained at the maximum gas flow Qmax of the additional burner. Therefore, in this case, the ignition pattern A has a slow ignition pattern A-1, and the stable pattern C has a constant pattern C-2 without the initial transition period. However, the maximum gas flow rate Qmax is considerably smaller than that in the case of (1) the water heater (hot water supply). In the reheating operation, normally, when the bath temperature reaches the set temperature, the operation is stopped and the gas flow rate is automatically cut off.

The fan heater of FIG. 5 (4) has a slow ignition pattern at the time of ignition A. Then, the gas flow rate rapidly increases the heating capacity at the maximum input amount Qmax or more, and raises the room temperature. After that, as the temperature of the room rises, the gas flow rate is gradually reduced by the stepwise proportional control to reach the constant flow rate Q3. In the stable period C, stepwise proportional control in which the amount of input gas is determined with respect to the temperature of the room is usually performed, and the gas flow rate fluctuates by a constant gas flow rate around the constant flow rate Q3.

Therefore, in the case of this fan heater, the ignition time A is the slow ignition pattern A-1, the initialization transition period B corresponds to the step decrease pattern B-4, and the stable period C is the step control pattern C-. It corresponds to 3.

Depending on the operating condition of another fan heater,
As shown in FIG. 5 (4), there may be a case where the slow ignition pattern A-1 becomes a stable period pattern C-2 which is a constant control pattern in which Qmax is constant without passing through the initial transition period. For example, when the fine heater is operated in a room with low temperature. Thus, after ignition, the maximum input amount Qmax
Pattern C-2, even when the condition continues for a long time
It can be distinguished from the water heater (bath cooker) by detecting the matching with and the flow rate range at that time. Further, the maximum input amount Qmax differs depending on the capacity of the fan heater, and for 6-8 tatami mats, 8-14 tatami mats, and large rooms, the maximum input amount Qmax gradually increases.

The above step control pattern C-3 is shown in the partial flow rate pattern in the stable period in FIG. In the step control pattern C-3, the gas flow rate is controlled up and down in a stepwise manner from the constant flow rate Q3 by following changes in the room temperature and the like. Since the step type proportional valve is used, the change ΔQi in the gas flow rate is determined by the step width Δ of the proportional valve.
It becomes Q (ΔQi = ± ΔQ), and it is a stable period, so it will definitely decrease after the increase and always increase after the decrease (ΔQi × Δ
Qi + 1 <0).

5 (5), at the time of ignition A, the stove is ignited at a gas flow rate Q2 obtained by adding the pilot gas flow rate to the maximum gas flow rate Qmax, and the gas flow rate is maintained for a certain period of time. Eventually, gas flow rate ΔQ for pilot burner
It decreases only to the stable period C. This pilot burner only burns for a certain period of time at the time of ignition, and is provided as an extinguishing safety function of preventing the burner on the combustion side from extinguishing without igniting and escaping gas as it is at ignition. Therefore, in the stable period C, this pilot burner does not burn. Further, in the stable period C, the gas flow rate is kept constant, and the gas flow rate is controlled in two steps, large and small, but in that case, the gas flow rate is kept constant in each step.

A fixed flow rate ignition pattern may be used as a gas flow rate pattern at the time of ignition of another stove. In this case, since the ignition takes place together with the pilot burner and the pilot burner does not disappear thereafter, there is no decrease ΔQ in the gas flow rate corresponding to the pilot burner, and only the maximum gas flow rate is reached at the time of ignition.

The ignition pattern of FIG. 6 includes the above-mentioned extinguishing safety ignition pattern A-4 and fixed flow rate ignition pattern A-3.
And are indicated. In the fixed flow rate ignition pattern A-3, as described above, the maximum gas flow rate Qmax (or any gas flow rate Q2) rises in a short time (within about 1 second), whereas in the extinguishing safety device fire pattern A-4. , After a certain gas flow rate Q2 rises, the state is kept for several seconds (2 seconds ≤ t ≤
5 seconds), and then the gas flow rate Qp for the ignition pilot
It gradually decreases by (100Kcal / h ≦ Qp ≦ 400Kcal / h).

In the table stove (6) of FIG. 5, the direct ignition flow pattern (fixed flow ignition pattern A-3) is present at the time of ignition A, and in the subsequent initial transition period B, the gas flow rate largely fluctuates, Eventually, a stable period C is reached. However,
Even in the stable period, the flow rate may be manually adjusted depending on cooking. Further, there is another table cooker which, at the time of ignition A, has a fire pattern A-4 for the safety device.

The stove transition period pattern B-5 is shown in the partial flow rate pattern of the initial transition period in FIG. Since the input is adjusted manually, the maximum gas flow rate Qmax (or any gas flow rate Q2) at ignition can be changed for several seconds (0.5
sec ≤ t ≤ 3 sec), and then irregularly fluctuates, then a constant flow rate Q
Up to 3. The constant flow rate Q3 is lower than the flow rate at the time of ignition by ΔQ. Therefore, ΔQ <0.

As described above, when examining the gas flow rate patterns involved in the combustion control of a plurality of gas appliances, at ignition time A, a slow ignition pattern A-1, a fire pattern A-2, a fixed flow rate ignition pattern A- 3, lit fire pattern A-4 for extinguishing safety device
Can be classified into four patterns. Therefore, the partial flow rate pattern at the time of ignition of the flow rate pattern table is as shown in FIG.
As shown in, four types of partial flow rate patterns are registered.

An example of characteristic data of each flow rate pattern is as shown in FIG. 6, and the slow ignition pattern A-1
Then, the time t of the slow ignition gas flow rate Q1 is 0.5 sec ≦ t ≦ 10se
At c, the slow ignition gas flow rate Q1 is Q1 = K (n / k) Qmax (k is the number of burner surfaces, 0.7 ≦ K ≦ 0.9). Fire pattern A-
In 2, the ignition gas flow rate Q1 is 60 Kcal / h ≦ Q1 ≦ 400 Kcal /
In h), the time t is 3 sec ≦ t. In the fixed flow ignition pattern A-3, the rise time t of the gas flow is t ≦ 1 sec.
Is. And the fire pattern A-4 for the safety device
Then, the rising gas flow rate time t is 2 sec ≦ t ≦ 5 sec, and the decreasing gas flow rate Qp is 100 Kcal / h ≦ Qp ≦ 400 Kcal / h.

Further, in the initial transition period B, the hunting pattern B-1, the monotone decrease pattern B-2, and the monotone increase pattern.
B-3, step decrease pattern B-4, stove transition pattern
It can be classified into 5 types of partial flow patterns of B-5. Therefore, as shown in FIG. 7, the above-mentioned five types are registered as the partial flow rate patterns in the initial transition period of the flow rate pattern table.

An example of characteristic data of each flow rate pattern is as shown in FIG.
In B-1, the absolute value of the up / down change amount ΔQi gradually decreases (|
ΔQi |> | ΔQi + 1 |), and the increase and decrease are repeated (ΔQi
× ΔQi + 1 <0). Further, in the simple decrease pattern B-2, the amount of change at the constant time interval t gradually decreases (ΔQi> Δ
Qi + 1), and the amount of change ΔQi is always negative (ΔQi <0).
In the simple increase pattern B-3, the change amount at the constant time interval t gradually decreases (ΔQi> ΔQi + 1), and the change amount ΔQi
Is always positive (ΔQi> 0). Step reduction pattern B-
In 4, the change in gas flow rate ΔQi is the unique step flow rate ΔQi.
Is an integral multiple of (ΔQi = NΔQ), the change amount ΔQi is always negative (ΔQi <0). The step flow rate ΔQ can be obtained from the gas flow rate change amount in the stable period C. And in the stove transition period pattern B-5, a short time t (0.5 sec ≦ t
The flow rate is reduced by an arbitrary flow rate ΔQ (≦ 3 sec) (ΔQ <0).

In the stable period C, the proportional control pattern C-1, the constant pattern C-2, and the step control pattern C-
It can be classified into three types of three partial flow patterns. Along with this, as shown in FIG. 7, the three types of partial flow patterns in the stable period are registered.

An example of characteristic data of each flow rate pattern is as shown in FIG. Proportional control pattern C-
1, the amount of change in gas flow rate (| Qi-Qi-1 |) at a certain fixed time (for example, X = 10 sec) is the average flow rate during that period.
It is suppressed within several% (M = 0.03) of Qave, and the difference between the maximum and minimum flow rate (Qmax-Qmin) within a certain fixed time is 10
It is about 0 Kcal / h (= L) or more. That is, in the proportional control, the gas flow rate changes to some extent. Constant pattern
In C-2, the amount of change in the gas flow rate is smaller than that in the proportional control pattern, and the difference (Qmax-Qmin) between the maximum and minimum flow rates within a fixed time (for example, X = 10 sec) is within about 100 Kcal / h (= L). In the step control pattern C-3, the change amount ΔQi of the gas flow rate is the step width ± ΔQ, and the increase and the decrease are alternately repeated (ΔQi × ΔQi + 1 <0).

FIG. 9 is a diagram showing an example of the new instrument table in the present embodiment. The new gas appliance table 52 preferably includes, for each and every gas appliance, a combination of partial flow patterns, a flow range corresponding to each partial flow pattern, and a time limit for continuous operation.

For example, in this diagram, the combination of the partial flow patterns of the water heater (hot water supply) is as follows: the ignition time A is a slow ignition pattern A-1, the initial transition period B is a hunting pattern B-1,
Either the simple decrease pattern B-2 or the simple increase pattern B-3, the stable period C is the proportional control pattern C-1. And
The flow range for each pattern is shown.

The flow range at the time of ignition of the water heater (hot water supply) is
The range of the slow ignition gas flow rate Q1 is shown. Further, the flow rate range in the initial transition period is a range of gas flow rates that are actually detected, such as hunting, monotonous decrease and monotonous increase. The flow rate range in the stable period is also the range of gas flow rates to be detected. The gas flow rate range in this stable period varies due to the difference in the above applications. In this way, the flow rate range set in the new appliance table 52 is a relatively wide range that each gas appliance can have.

Further, the combination of the partial flow patterns of the BF type bath kettle, the CF type bath kettle, and the small water heater is such that at the time of ignition A, either the ignition pattern A-2 or the fixed flow rate ignition pattern A-3, the initial transition period B is used. The stable period C is a constant pattern C-2. The flow rate range at ignition indicates the flow rate range in the fixed flow rate ignition pattern. In the case of a fire pattern,
As shown in A-2 of FIG. 6, the flow range of the igniting gas flow rate Q1 is included in the characteristic data, and therefore need not be shown in the appliance table. In case of fixed flow ignition,
The flow rate range is the same during ignition and during the stable period.

As shown in the figure, the combination of the partial flow patterns of the water heater (bath heating) is as follows: the ignition time A is a slow ignition pattern A-1, the initial transition period B is not present, and the stable period C is a constant pattern C-. Is 2. The flow rate range at the time of ignition is the range of the slow ignition gas flow rate.

As for the combination of the partial flow patterns of the fan heater, the ignition time A is a slow ignition pattern A-1, the initial transition period B is a step decrease pattern B-4, and the stable period C is a step control pattern C-3. . Also, the flow rate range at ignition is
The range of the slow ignition gas flow rate, and the flow range of the initial transition period and the stable period is the range of the detected gas flow rate.
As described above, the initial transition period may not exist depending on the operating status of the fan heater.

Next, the combination of stove partial flow patterns is direct ignition pattern A-3 at ignition A or ignition pattern A-4 for extinguishing safety device, there is no initial transition period B, and stable period C is a constant pattern. It is C-2. The flow rate range at ignition is the range of gas flow rate at ignition.

Further, the combination of the partial flow patterns of the table stove is the direct ignition pattern A-3 or the ignition pattern for the safety device A-4 at the time of ignition, and the initial transition period B is the stove transition period pattern B-5. , The stable period C is a constant pattern C-2. The gas flow rate range during ignition and the initial transition period are in the same range, and the flow rate range during the stable period is wider.

In this way, the combination of partial flow rate patterns corresponding to each gas appliance is registered in the appliance table. Therefore, the gas appliance can be determined from the combination of the partial flow patterns. However, some gas appliances may have the same combination of partial flow patterns. For example, the small water heater and the stove have the same combination as the fixed flow rate ignition pattern A-3 at the time of ignition A and the constant pattern C-2 at the stable period C without the initial transition period.
Even in this case, since the gas flow range of the small water heater is higher than that of the stove, both gas appliances can be distinguished by comparing the gas flow rates.

FIG. 10 is a diagram showing an example of a registered gas appliance table in the present embodiment. The registered gas appliance table 54 is a combination of partial flow rate patterns for each gas appliance used by each customer, and a characteristic flow rate in each partial flow rate pattern (this characteristic flow rate is
(This is one of the characteristic data that constitutes the partial flow pattern)
And at least a time limit.

The device registered in the registered device table 54 is a device specified by the new registration mode described later, and the characteristic flow rate in the partial flow rate pattern registered for each device is also actually measured in the new registration mode. The flow rate detected in is registered. That is, rather than the relatively wide flow range registered in the new device table,
Since the flow rate (or flow rate range) peculiar to the device is registered, the device can be determined more accurately.

In the registered appliance table, gas appliances are classified and registered according to the partial flow rate pattern in the stable period. That is, the classification of gas appliances is, for example,
(1) Fixed / semi-fixed device, (2) Step device, (3)
They are stepless control (proportional control) instruments and (4) stepless control (non-proportional control) instruments. The fixed / semi-fixed device is a device in which the stable period C has a constant pattern C-2 and the characteristic flow rate thereof is fixed to one or about 2 to 3, for example, a stove corresponds to this. . The step device is a stable period C step control pattern C-3, and is a device having a fixed flow rate of 3 or more as a characteristic flow rate, and for example, a fan heater corresponds to this. In the stepless control (proportional control) device, the stable period C is the proportional control pattern C-1, and the characteristic flow rate is not the fixed flow rate, but the flow rate range (maximum flow rate and minimum flow rate) is set. That is, for example, a water heater. In the stepless control (non-proportional control) device, the stable period C has a constant pattern C-2.
However, the characteristic flow rate is not a fixed flow rate, but a device in which a flow rate range is set, and for example, a stove falls under this. This classification of gas appliances is used for a gas appliance determination method in operation of a plurality of appliances, which will be described later.

Referring to FIG. 10 for explaining a concrete example of the registered appliance table, the combination of partial flow patterns of the stove, which is a fixed / semi-fixed appliance, is such that at the time of ignition A, it disappears at the time of ignition, and a safety device igniting pattern A-4. There is no period B, and the stable period C is a constant pattern C-2. At this time, the flow rate characteristic of the igniting safety device igniting pattern A-4 is the flow rate Q2 at the time of ignition and the reduced flow rate (pilot flow rate) Qp from that, and two fixed flow rates are registered.

When the registered flow rate is a fixed flow rate, whether or not each detected flow rate corresponding to each fixed flow rate is substantially equal to each fixed flow rate in the normal determination for determining an instrument using the registered instrument table. Is determined. For example, if the detected flow rate is within ± 3% of the corresponding fixed flow rate, it is determined that the flow rates match.

Since the stove has no initial transition period, both the partial flow pattern and the flow rate are blank. The flow rate characteristic of the constant pattern C-2 during the stable period is the constant flow rate Q.
3 and, for example, if the stove is a two-sided switching combustion, 2
Has one fixed flow rate.

Further, the combination of the partial flow rate patterns of the fan heater which is the step device is as follows: the ignition time A is a slow ignition pattern A-1, the initial transition period B is a step decrease pattern B-4,
The stable period C is the step control pattern C-3. At this time, the flow rate characteristic of the slow ignition pattern A-1 at the time of ignition A is the flow rate Q1 at the time of ignition, which is registered as the fixed flow rate.

Step control pattern C- during stable period C
The flow rate characteristic of 3 is a detected flow rate for each step, and a plurality of flow rates for each step are fixed flow rates, and may match at least one of the registered fixed flow rates. Step reduction pattern in early transition period
As the characteristic flow rate in B-4, the maximum step flow rate and the minimum step flow rate of each step flow rate in the stable period are registered as a flow rate range.

When the registered flow rate is within the flow rate range, it is determined whether or not the detected flow rate is within the flow rate range during the normal determination for determining the instrument using the registered instrument table. If so, it is determined that the flow rates match.

Furthermore, the combination of the partial flow patterns of the water heater (hot water supply) which is a stepless control (proportional control) device is as follows:
The ignition time A is a slow ignition pattern A-1, the initial transition period B is a hunting pattern B-1, and the stable period C is a proportional control pattern C-1. At this time, the flow rate characteristic of the slow ignition pattern A-1 at the time of ignition A is the flow rate Q1 at the time of ignition similarly to the fan heater, and this is registered as the fixed flow rate.

Hunting pattern B- in the initial transition period
As the characteristic flow rate in 1, the maximum flow rate and the minimum flow rate detected in the initial transition period are registered as the flow rate range. Proportional control pattern C-1 in stable period C
As for the characteristic flow rate, the maximum flow rate and the minimum flow rate among the flow rates detected in the stable period are registered as the flow rate range.

Further, the combination of the partial flow rate patterns of the stove which is the stepless control (non-proportional control) instrument is as follows: ignition time A is a fixed flow rate ignition pattern A-3, and initial transition period B is a stove transition period pattern B-5. , Stable period C is a constant pattern C
-2. The flow rate characteristic of the fixed ignition pattern A-3 is
It is the flow rate Q2 (or Qmax) at the time of ignition. As the flow rate characteristic of the stove transition period pattern B-5, the maximum flow rate and the minimum flow rate of the flow rates detected in the initial transition period are registered as the flow rate range. Constant pattern C-2 in stable period C
As for the characteristic flow rate, the maximum flow rate and the minimum flow rate among the flow rates detected in the stable period are registered as the flow rate range.

As described above, in the registered instrument table 54,
In addition to the combination of partial flow patterns of each device, the actual flow rate unique to that device is registered as a fixed flow rate or flow range as a characteristic flow rate in each partial flow pattern, and the partial flow pattern in each control step is registered. Since the device determination is performed based on and the flow rate peculiar to the device, the possibility of erroneous determination is extremely small, and highly accurate device determination is possible.

Furthermore, by registering the registered flow rate for each season, it is possible to make a more detailed determination and reduce the possibility that a plurality of appliances will be extracted. Specifically, the registered flow rate for each season can be obtained as follows. The season at the time of initial registration is stored, and the registration flow rate is corrected in consideration of a predetermined coefficient for the current season. Alternatively, the registered flow rate corrected for each season is registered in the registered device table. The registered flow rate of the device is detected and additional registration is performed at a predetermined time when the season from the initial registration to another season. Applying both of the above, for the time being, while the registered flow rate for other seasons cannot be actually detected, is used and the registered flow rate is overwritten and registered by the process when another season comes. In addition to the season (for example, month or calendar), the outside temperature can be a factor for correction.

FIGS. 11 and 12 are flow charts of judgment in the gas appliance judgment module 43 in the present embodiment. Specifically, FIG. 11 is a flowchart of a normal determination mode for determining a gas appliance based on the registered appliance table, and FIG. 12 is a new registration table 52 when the gas appliance cannot be extracted from the registered appliance table.
It is a flowchart about the new registration mode which determines a gas appliance with reference to FIG. This flowchart also includes the functions of the modules 44, 46, and 48 that make up the gas appliance determination module 43 shown in FIG. Further, here, as a premise, the case where a plurality of gas appliances are simultaneously operated is excluded. The determination method is shown only when each gas appliance is operated independently. A method for determining a gas appliance that is newly started while the gas appliance is operating, and a method for determining a gas appliance that is stopped while the gas appliances are operating will be described later.

In FIG. 11, when the gas flow rate is detected (S100), the time at that time is set as the operation start time in the memory 4
2, and further, the gas flow rate signal S20 from the gas flow rate detecting means 20 is sequentially recorded in the memory 42 (S102). For example, the instantaneous gas flow rate detected at intervals of 2 seconds or less is recorded in the memory 42. Thereby, the waveform of the gas flow rate with respect to time can be specified.

The instantaneous gas flow rate detected at a constant sampling interval is monitored, and the end of combustion control at ignition is detected by the control step determination module 44. Specifically, a predetermined time (for example, 10
It can be determined that the ignition has ended when (seconds) has elapsed. Alternatively, as another method, it may be possible to determine that the ignition has ended when the gas flow rate reaches a peak value after ignition.

When the end of combustion control at ignition is detected,
Characteristic data is generated from the detected gas flow waveform at the time of ignition. Then, the partial flow rate pattern that matches the characteristic data is extracted from the flow rate pattern table 50 as illustrated in FIG. 6 (S104).

Various methods are conceivable as the matching process for determining whether or not the partial flow rate pattern matches. As an example, there is a method of extracting the characteristic data of the detected gas flow rate waveform and checking whether it matches the characteristic data of the registered partial flow rate pattern. In the example shown in FIG. 6, in the slow ignition pattern A-1, the gas flow rate Q1 for slow ignition is first detected, and that state continues for time t. After that, the gas flow rate changes to a certain gas flow rate Q2 or Qmax. Therefore, as described above, the slow ignition gas flow rate Q1 is 0.7 times the maximum gas flow rate Qmax.
The characteristic data of the slow ignition pattern A-1 can be the range of 0.9 to 0.9, and the time t of 0.5 to 10 seconds. Therefore, the slow ignition gas flow rate Q1 and the time t are obtained as characteristic data from the detected gas flow rate waveform, and by checking whether or not the values fall within the range of the characteristic data of the flow rate pattern table, Matching processing is performed.

In the ignition pattern A-2, the initial ignition gas flow rate Q1 has a very small absolute value. For example, the ignition gas flow rate Q1 is in the range of 60 to 400 Kcal / h. The characteristic data is that the maintained time t is in the range of 3.0 seconds or more. Therefore, from the detected gas flow rate waveform, the first flow rate Q1 and the time t during which it is maintained are obtained as characteristic data, and it is checked whether or not the value falls within the range of the characteristic data of the flow rate pattern table. Thus, the matching process is performed.

In the direct ignition pattern A-3,
The time t to rise to the peak flow rate Q2 is as short as 1.0 second or less, and in addition, in the fire extinguishing device fire pattern A-4,
There is a slight decrease in the flow rate Qp after the time t has risen to the peak flow rate Q2, the time t is in the range of 2.0 to 5.0 seconds, and the decreased flow rate Qp is 100 to 400 Kcal / h. Therefore, matching is performed by obtaining these characteristic data t and Qp from the detected gas flow rate waveform and determining whether or not they correspond to the characteristic data of the flow rate pattern table.

Returning to FIG. 11, when the partial flow rate pattern is extracted, an appliance having the partial flow rate pattern and the detected flow rate is searched from the registered appliance table (S106).
If a matching device is not extracted, the process shifts to a new registration mode described later. When the matching device is extracted, the number of the matching devices is determined (S108), and when it is one, the currently operating device is specified as the extracted device. When there are a plurality of devices, the device determination based on the flow rate pattern is further performed in the next control step.

After ignition, it is detected whether the change in the detected flow rate is constant, that is, whether the gas flow rate is stable (S110). When stable is detected, it is known that the stable period has been reached, and the period from the ignition flow rate to the stable period is determined as the initial transient period.

Therefore, the characteristic data of the detected partial flow rate pattern in the initial transition period is obtained and compared with the partial flow rate patterns classified in the initial transition period of the flow rate pattern table 50 to extract the partial flow rate pattern (S112). The comparison method is performed depending on whether the characteristic data is applicable, as in the case of ignition.

Therefore, the characteristic data of the partial flow rate pattern in the initial transition period will be described with reference to FIG. 7. In the case of the hunting pattern B-1, the flow rate difference ΔQi between the peak flow rates is obtained and its absolute value is calculated. The characteristic data is that the flow rate gradually decreases and the sign of the flow rate difference ΔQi changes alternately. Therefore, by detecting each peak flow rate value from the detected series of gas flow rate values and determining their flow rate differences ΔQi, ΔQi + 1,
Characteristic data can be generated.

In the case of the simple decrease pattern B-2, when the change flow rate ΔQi of the detected gas flow rate is calculated at constant time intervals t, the absolute value of the change flow rate ΔQi gradually decreases and the sign of the change flow rate ΔQi. Are all negative. Similarly, in the case of the simple increase pattern B-3, the absolute value of the change flow rate ΔQi gradually decreases, and its sign becomes all positive. In the case of the step decrease pattern B-4, the flow rate change ΔQi is an integral multiple of a certain unit flow rate ΔQ, and the signs of the flow rate change ΔQi are all negative. In the stove transition period pattern B-5, the flow rate change ΔQ occurs within the time t, the time is within the range of 0.5 to 3.0 seconds, and the sign of the change ΔQ is negative.

Regarding the partial flow rate pattern in the initial transition period,
The characteristic data is calculated from the detected gas flow rate so that it can be compared with the pattern so as to be compared with the above characteristic data.

Returning to FIG. 11 again, when the partial flow rate pattern in the initial transition period is extracted, the appliance having the detected partial flow rate pattern and the detected flow rate is searched from the registered appliance table as in the case of ignition ( S114). If a matching device is not extracted, the process shifts to a new registration mode described later.
When the matching appliance is extracted, the number of the matching appliances is determined (S116), and when it is one, the appliance currently in operation is specified as the extracted appliance. When the number is plural, the device determination based on the flow rate pattern in the next control step (that is, the stable period) is further performed.

Next, the characteristic data of the partial flow rate pattern in the stable period is obtained, and the partial flow rate pattern in the stable period is extracted from the flow rate pattern table 50 (S118). As shown in the partial flow rate pattern in the stable period of FIG. 8, in the case of the proportional control pattern C-1, the average value Qave, the maximum value Qmax, and the minimum value Qmin are updated from a plurality of detected flow rates Qi for a fixed time X seconds. However, if the adjacent detected flow rate difference (| Qi-Qi-1 |) is within several% (example 3%) of the average value Qave, and there is a difference between the maximum and minimum values (L = 100Kcal / h) or more. It is the characteristic data.

In the case of the fixed pattern C-2, there is a flow rate (L = 100 Kcal /
h) The characteristic data is as follows. Further, in the case of the step control pattern C-3, the step width ΔQi is characterized in that its sign is alternately changed at a constant step width.

In this way, when the partial flow rate pattern in the stable period is extracted, the appliance having the detected flow rate with the partial flow rate pattern is searched from the registered appliance table, as in the case of ignition (S120). If a matching device is not extracted, the process shifts to a new registration mode described later. If a matching instrument is extracted, the currently active instrument is identified to that extracted instrument. Each control step, i.e. at ignition,
Since there are only one combination of partial flow patterns for each of the initial transition period and the stable period and the characteristic flow rates corresponding to each flow pattern, if a matching device is extracted in step S120, it is specified as one device. To be done.

When the appliance in operation is specified, the operation start time is written in the start time recording area of the registered appliance table corresponding to the appliance, and the start time stored in step S102 is written to suit the gas appliance. The operation shifts to the operation monitoring mode (S122). As a specific example, it is monitored whether or not the operating time exceeds the time limit (safety continuous operating time) set for each gas appliance. If it exceeds, an alarm is output or the gas shutoff valve is shut off. Further, the monitoring of the time limit is continued even if the gas flow rate changes during the monitoring. In the conventional gas meter, if the gas flow rate changes, it is determined that the continuous operation has ended. However, in the present embodiment, the appliance can be specified with high accuracy, and the flow rate pattern of the appliance is grasped. Therefore, even if the gas flow rate varies as in the proportional control pattern, for example. , It can be determined to continue operation.

As described above, in the present embodiment, a registered instrument table in which a combination of partial flow rate patterns for instruments used at each customer's house and the flow rate peculiar to the instrument are registered is created, and the registered instrument table is used. A decision is made. Therefore,
More accurate device determination is possible than when using a combination of flow patterns for a huge number of gas appliances covering all types and a new appliance table with a relatively wide flow range set. Becomes

Next, the new registration mode of FIG. 12 will be described. In the normal determination mode of FIG. 11, the appliance registered in the registered appliance table is identified from one of the extracted partial flow patterns of the ignition time (A), the initial transition period (B), and the stable period (C). If not, the new registration mode is executed.

In FIG. 11, the partial flow rate pattern of each control step that has not been acquired is extracted by the necessary processing in accordance with the stage of transition to the new registration mode (S20).
0, S202, S204).

When the partial flow rate patterns for ignition, the initial transition period, and the stable period are acquired, the gas appliances matching the combination of the partial flow rate patterns are extracted from the new appliance table 52 (S206). New equipment table 5
Since almost all appliances currently used in the world are registered in 2, the possibility of extracting a gas appliance that matches the combination of partial flow rate patterns by searching the new appliance table 52 is extremely high. . However, there is a possibility that the matching device cannot be extracted, for example, when a device that is not registered in the new device table or has a new control method is operated. In that case, operation monitoring is performed based on the safety continuous operation time depending on the flow rate as in the past.
(S218).

The instruments extracted from the new instrument table are
Each partial flow rate pattern and a characteristic flow rate in each partial flow rate pattern (flow rate registered in the registered device table) are stored in a predetermined temporary storage memory (S208).

In this way, once the device is specified from the new device table, the device is once stored in the temporary storage memory, and the specified number of times for the device is incremented by +1.
Add (S210). Then, each time a device is specified from the new device table 52, the number of times the same device is specified is determined.
(S212). When the specific number of times reaches a predetermined number (N is, for example, about 5 to 10), the device is registered in the registered device table 54 (S214). In the registered instrument table 54, an instrument name, a partial flow rate pattern for each control step, a characteristic flow rate (fixed flow rate or flow rate range) in each partial flow rate pattern,
This is the time limit, and the registered flow rate is not the value of the flow rate range registered in the new appliance table 52, but the characteristic flow rate (preferably, a plurality of flow rates in each partial flow rate pattern of the actually detected flow rates). It is the average value of each characteristic flow rate in one time).

Since a large number of instruments are registered in the new instrument table 52 as compared with the registered instrument table, there is a possibility that the wrong instrument may be determined by specifying the instrument once. More specifically, there is a possibility that the partial flow rate pattern may be erroneously recognized due to the deviation of the sampling timing of the flowmeter, and the wrong instrument may be determined.
Registered device table 54 for the first time by specifying the device multiple times
It was decided to register at.

When the specified appliance is registered in the registered appliance table, the operation monitoring mode according to the time limit registered for each gas appliance is executed (S216).

FIG. 13 is a flowchart of the operation monitoring mode. When the gas appliance is specified from the registered appliance table 54 (or when the gas appliance is registered in the registered appliance table), the operation monitoring module 56 displays the time limit T and the operation start time set for the appliance. Acquired (S30
0), while the gas flow rate Q is detected (S302), it is determined whether or not the time limit T has elapsed from the start time (S304), and if it does, a safety operation such as shutoff or alarm is executed (S30).
6). If the gas flow rate is no longer detected before the time limit T elapses, it is considered that the operation of the instrument has stopped, and the monitoring operation ends.

Note that, in step S212 of FIG. 12, if the specified number of times for the device is less than the predetermined number of times, the device cannot be completely specified, and thus operation based on the safe continuous operation time depending on the flow rate as in the conventional case is performed. Monitoring is performed (S218).

It is expected that a new gas appliance which is not registered in the flow rate pattern table or the new appliance table will be operated and the gas appliance cannot be specified. Therefore,
In the present embodiment, it is preferable that a new partial flow pattern or gas appliance can be added to the flow pattern table or appliance table in the gas meter. The addition can be performed, for example, by transmitting the data from a remote center using a communication line and recording the data in each table in the gas meter control unit.

[Gas appliance determination method in operation of a plurality of gas appliances] Next, using the above-described gas appliance determination method in operation of a single gas appliance, a gas appliance determination method in operation of a plurality of gas appliances, that is, gas A method for determining a gas appliance that is newly started during operation of the appliance and a method for determining a gas appliance that is stopped during operation of a plurality of gas appliances will be described. More specifically, a method of determining a gas appliance corresponding to a change in gas flow rate during operation of the gas appliance,
(1) Judgment of gas appliances corresponding to increase in gas flow rate during operation of at least one gas appliance, (2) Determination of gas appliances corresponding to decrease in gas flow rate during operation of a plurality of gas appliances explain. In the gas appliance determination method in the operation of multiple gas appliances, when the flow rate change is detected, does the gas appliance in operation only cause the flow rate change? When the operation is started or the flow rate is decreased, it is necessary to determine whether the gas appliance in operation is stopped.

Regarding the judgment methods of the above (1) and (2),
Before explaining, the definition of the flow rate increase change or the flow rate decrease change during the operation of the gas appliance, and the additional control step (flow rate control time D in the stable period) necessary for making this determination and the partial flow rate pattern therefor will be described. To do.

FIG. 14 is a diagram for explaining the definition of the flow rate increase change (a) or the flow rate decrease change (b) during the operation of the gas appliance. For example, when the gas appliance is operated in the stable period C, the gas flow rate is not always constant. In this case, the flow rate change within the range that satisfies the condition of the stable period C,
It is necessary to distinguish from flow rate changes outside the range (flow rate changes triggered by human operation, flow rate changes due to start or stop of operation of gas appliances, etc.). Therefore, in the present embodiment, ΔQ = Q−Qave is obtained as the flow rate change amount ΔQ, and when the change rate of ΔQ with respect to Qave is, for example, n (for example, 3)% or more, it is determined that there is a flow rate change. Of course, when ΔQ is positive, it means that the flow rate has increased and Δ
When Q is negative, the flow rate is decreased. In addition,
Qave is an average value of each flow rate Q at the sampling timing of m times (for example, 3 to 5) before the flow rate Q at this sampling timing.

FIG. 14A is a diagram showing an example of changes in the gas flow rate when the flow rate increases. In FIG. 14A, time t1
A flow rate increase change (ΔQ / Qave ≧ 0.03, ΔQ> 0) is detected at. In addition, Q ′ (t) in FIG.
Is a gas flow rate obtained by subtracting Qave before the flow rate increase change from the gas flow rate Q (t) at each sampling timing after the detection of the flow rate increase change, that is, Q ′ (t) = Q (t) −Qave, The flow rate difference value before and after the increase change is shown. Further, the flow rate in the stable period at Q '(t) is defined as Qc'.

FIG. 14B is a diagram showing an example of changes in the gas flow rate when the flow rate decreases. In FIG. 14B, time t2
A decrease in flow rate (ΔQ / Qave ≧ 0.03, ΔQ <0) is detected at. In addition, ΔQc in FIG. 14B is Qave before the flow rate increase change before subtracting the flow rate Qc in the stable period after the flow rate decrease change from the gas flow rate Q at each sampling timing after the flow rate decrease change detection before the flow rate increase change. Qave
Is a gas flow rate obtained by subtracting, i.e., ΔQc = Qave-Qc, and shows a flow rate difference value between stable periods before and after a decrease in flow rate.

FIG. 15 is a diagram for explaining a partial flow rate pattern at the time of flow rate control D in the stable period. Flow rate control D
Is when the gas appliance causes a predetermined flow rate change during operation in the pattern of the stable period C, for example, by a trigger such as a human operation. The human operation is, for example, an operation of adjusting the heat power during operation of the stove, an operation of changing the set temperature of the water heater, an operation of changing the amount of water from the water heater, or the like. When such an operation is performed, a relatively large flow rate change exceeding the range of the stable period C occurs during the stable period C, for example.

FIG. 15 shows a proportional control pattern D-1 and a table stove pattern D-2 as the partial flow rate patterns at the time of flow rate control D. Proportional control pattern D
-1 is a pattern that occurs when a relatively large flow rate change occurs during the stable period in a gas appliance (for example, a water heater) whose stable period C is the proportional control pattern C-1 during the stable period. In the characteristic data of the proportional control pattern D-1, in the flow rate increase change, once the gas flow rate ΔQ1 flow rate increase change occurs, then the gas flow rate ΔQ2 flow rate decrease change occurs, and the gas flow rate ΔQ1 and ΔQ2 change to ΔQ2. > 0.05
The time t at which the gas flow rate decrease change of ΔQ2 occurs is about 2 seconds or more and 5 seconds or less (2 seconds ≦ t
≦ 5 seconds). The flow rate increase change in the proportional control has a so-called overshoot phenomenon in which a relatively small flow rate decrease change occurs after the flow rate increase change. Therefore, by grasping this phenomenon, the flow rate increase change in the proportional control is detected. be able to.

On the other hand, the characteristic data of the proportional control pattern D-1 in the decrease in the flow rate is as follows. After the decrease in the gas flow rate ΔQ3 occurs, the increase in the flow rate ΔQ4 occurs, and the gas flow rates ΔQ3 and ΔQ4 are changed. , ΔQ4> 0.05 × ΔQ
3 is satisfied, and the time t at which the gas flow rate increase change of ΔQ4 occurs is approximately 2 seconds or more and 5 seconds or less (2 seconds ≦ t ≦ 5
Second). The flow rate decrease change in proportional control is a relatively small flow rate increase change after the flow rate decrease change.
Since a so-called undershoot phenomenon can be seen, it is possible to detect a decrease in the flow rate in proportional control by grasping this phenomenon with this characteristic data.

Similar to the proportional control pattern D-1, in the table cooktop pattern D-2, when the flow rate is increased, when the gas flow rate ΔQ1 is increased and the gas flow rate ΔQ2 is decreased (overshoot) and when the flow rate is decreased. , And the gas flow rate ΔQ4 increases (undershoots) after the gas flow rate ΔQ3 decreases. Further, similarly to the proportional control pattern D-1, the gas flow rates ΔQ1 and ΔQ, respectively.
2 must satisfy the relationship of ΔQ2> 0.05 × ΔQ1, and the gas flow rates ΔQ3 and ΔQ4 must satisfy the relationship of ΔQ4> 0.05 × ΔQ3. Then, the proportional control pattern D
The difference from -1 is that the duration t of the gas flow rates ΔQ2 and ΔQ4 is less than 1 second (0 <t <1 second). The gas appliance in which this pattern D-2 is generated due to the change in flow rate in the stable period is mainly a table stove.

Next, the determination methods of the above (1) and (2) will be described.

FIG. 16 is a diagram for explaining the outline of the gas appliance determination method corresponding to the change in the flow rate, and FIG.
FIG. 16B is a table for explaining (1) a method for determining a gas appliance corresponding to an increase in the flow rate, and FIG. 16B is a table for explaining a method for determining a gas appliance corresponding to (2) a decrease in the flow rate.

In FIG. 16A, for each type of equipment,
The method of judgment is shown when the equipment in operation causes a flow rate increase change and is newly started. In FIG. 16B, for each type of instrument, when the instrument in operation causes a decrease in flow rate, when the instrument in operation is stopped,
The determination method of is shown.

[Gas appliance determination method when operating appliance causes increase in flow rate change] Referring to FIG. 16 (a), first,
A method for determining a gas appliance that has undergone an increase in the flow rate during operation will be described.

When a fixed / semi-fixed device (for example, a stove) causes an increase in flow rate during operation (-1), the fixed flow rate gas flow rate QL to the gas flow rate QH set in the stable period in the registered device table Since the flow rate change Qc 'in the stable period C of the flow rate change Q' (t) before and after the flow rate increase change is constant pattern C, since
-2, the difference in flow rate between the two fixed flow rates (QH, QL) matches, that is, Qc '= QH-QL. be able to.

When the fixed / semi-fixed device causes an increase in flow rate during operation, the overshoot phenomenon does not appear, so the gas flow rate pattern detected when the increase in flow rate is
It is preferable to confirm that the pattern is not the D-1 or D-2 pattern.

When the step device (for example, a fan heater) causes an increase in the flow rate during operation (-2), any one of the three or more fixed flow rates set in the stable period in the registered instrument table can be used. This is the case when the flow rate changes to a fixed flow rate. Therefore, the flow rate change Qc 'in the stable period C of the flow rate change Q' (t) before and after the flow rate increase change is the difference value of two fixed flow rates that can be combined from three or more fixed flow rates in the step pattern C-3. Whether or not they match, that is, whether or not Qc '= Qsti-Qstj (i ≠ j), makes it possible to determine the flow rate increase change during the operation of the step device.

There are a plurality of combinations of the two fixed flow rates, and the difference value for each combination is obtained, and the match / mismatch is determined.

Also, when the flow rate increase changes during the operation of the step device (-2), the overshoot phenomenon does not appear, so the gas flow rate pattern detected when the flow rate increase changes is the above D-1 and D-. It is preferable to confirm that the pattern is not two.

The above determination method (-1, -2)
Corresponds to Supplementary Note 6 and Supplementary Note 13 summarizing the embodiments described later.

When a stepless control (proportional control) device (for example, a water heater) causes a flow rate increase change during operation (-3),
Since the stable period C of the stepless control (proportional control) device is the proportional control pattern C-1, the proportional control pattern D-1 at the time of the flow rate control appears. Therefore, it is possible to determine the flow rate increase change during the operation of the stepless control (proportional control) device depending on whether the gas flow rate pattern detected at the time of the flow rate increase change matches the pattern D-1.

Stepless control (non-proportional control) instruments (eg,
When the stove increases its flow rate during operation (-
4) Since the stepless control (non-proportional control) device is a table stove, a stove pattern D-2 at the time of flow rate control appears. Therefore, it is possible to determine the flow rate increase change during the operation of the stepless control (non-proportional control) device depending on whether or not the gas flow rate pattern detected when the flow rate increase changes matches the pattern D-2.

The above determination method (-3, -4)
Corresponds to Supplementary Note 5 and Supplementary Note 12 described later.

[Gas Appliance Judging Method When Starting New Operation] Next, with reference to FIG. 16 (a), a method of judging a gas appliance newly operated during operation of the gas appliance will be described.

When the gas appliance is newly started to operate (), the partial flow rate pattern at ignition A of the gas appliance to be started appears when the flow rate increases. Therefore, by detecting the partial flow rate pattern at the time of ignition A, it is possible to determine the gas appliance to be newly started.

More specifically, the partial flow rate pattern at the time of ignition A of a newly started gas appliance is a flow rate change Q ′ obtained by removing the gas flow rate of the operating gas appliance from the detected gas flow rate. It can be detected by comparing the gas flow rate pattern based on (t) (see FIG. 14A) with the partial flow rate pattern at the time of ignition A of the gas appliance registered in the registered appliance table. That is, the processing in the above-described normal determination mode (FIG. 11) may be performed using the gas flow rate pattern based on the flow rate change amount Q ′ (t). Therefore, when a plurality of gas appliances are extracted in comparison with the partial flow pattern at the time of ignition A, the initial transition period B following the time of ignition A, and further, the partial flow pattern of the stable period C and the flow rate change amount One gas appliance is identified based on a comparison with a gas flow pattern based on Q ′ (t).

The above determination method () corresponds to Supplementary Note 7, Supplementary Note 8, Supplementary Note 9, Supplementary Note 14, and Supplementary Note 15 to be described later.

As described above, according to the determination methods shown in FIG. 16A, the partial flow rate pattern (A pattern (), C pattern (-1) that matches the gas flow rate pattern detected with the increase in the flow rate. , -2), or D pattern (-3, -4)) is extracted from the registered appliance table to determine a gas appliance that has undergone an increase in flow rate during operation or a gas appliance that has newly started operation. be able to.

[Gas appliance determination method in the case where an appliance in operation causes a decrease in flow rate] Next, with reference to FIG. 16 (b), a method for determining a gas appliance in operation that causes a decrease in flow rate explain.

When a fixed / semi-fixed device (for example, a stove) causes a decrease in flow rate during operation (-1), the fixed flow rate QH to the gas flow rate QL set in the stable period in the registered device table. Since the flow rate difference value ΔQc between the stable periods before and after the decrease in the flow rate is the same as the difference value between the two fixed flow rates (QH, QL) in the constant pattern C-2 pattern, that is, ΔQc = QH-QL, it is possible to determine the flow rate decrease change during operation of the fixed / semi-fixed device.

When the fixed / semi-fixed device (stove) causes an increase in the flow rate during operation (-1), the undershoot phenomenon does not appear, so the gas flow rate pattern detected when the flow rate decreases is It is preferable to confirm that it is not the D-1 or D-2 pattern.

When the step device causes a decrease in the flow rate during operation (-2), it changes from any of the three or more fixed flow rates set in the stable period in the registered tool table to other fixed flow rates. This is the case. Therefore, whether or not the flow rate difference value ΔQc before and after the decrease in flow rate matches the difference value of two fixed flow rates that can be combined from the three or more fixed flow rates in the step control pattern C-3, that is, ΔQc = Qsti−Qstj ( It is possible to determine the decrease in the flow rate during the operation of the step device depending on whether i ≠ j).

There are a plurality of combinations of two fixed flow rates, a difference value for each combination is obtained, and a match / mismatch is determined for each combination.

Also, when the flow rate decrease changes during the operation of the step device (-2), the undershoot phenomenon does not appear, so that the gas flow rate pattern detected when the flow rate decrease changes is the above D-1 and D-. It is preferable to confirm that the pattern is not two.

The above determination method (-1, -2)
Corresponds to Supplementary Note 21 and Supplementary Note 29 described later.

When a stepless control (proportional control) device (for example, a water heater) causes a decrease in flow rate during operation (-3),
Since the stable period C of the stepless control (proportional control) device is the proportional control pattern C-1, the proportional control pattern D-1 at the time of the flow rate control appears. Therefore, it is possible to determine the flow rate decrease change during operation of the stepless control (proportional control) device depending on whether or not the gas flow rate pattern detected when the flow rate decrease changes matches the pattern D-1.

Stepless control (non-proportional control) instruments (eg,
If the flow rate decreases during operation of the stove (-
4) Since the stepless control (non-proportional control) instrument is a table stove, a stove pattern D-2 appears at the time of flow rate control. Therefore, it is possible to determine the flow rate decrease change during operation of the stepless control (non-proportional control) device depending on whether the gas flow rate pattern detected when the flow rate decrease changes matches the pattern D-2.

The above determination method (-3, -4)
Corresponds to Supplementary Note 20 and Supplementary Note 28 described later.

[Gas Judging Method When Operation of In-Use Appliances is Stopped] Next, with reference to FIG. 16 (b), regarding a method of determining gas appliances that have been stopped in operation during operation of a plurality of gas appliances explain.

When the operation of the fixed / semi-fixed appliance is stopped (-1), the gas flow rate decrease causes the gas flow rate QH or gas flow quantity QL which is the fixed flow rate set in the stable period in the registered appliance table to be gas. Flow rate decreases. Therefore, the flow rate difference value Δ between stable periods before and after the decrease in flow rate
The operation stop of the fixed / semi-fixed device is determined by whether or not Qc matches any of the two fixed flow rates (QH, QL) in the constant pattern C-2, that is, ΔQc = QH or QL. be able to.

Further, when the fixed / semi-fixed device is stopped, the undershoot phenomenon does not appear, so that the gas flow rate pattern detected when the flow rate decreases is the above D-1.
It is preferable to confirm that it is not the D-2 pattern.

When the step equipment is shut down (-
2) Due to the decrease in flow rate, a plurality of gas flow rates Q that are fixed flow rates set in the stable period in the registered device table
The gas flow rate for any of the sti is reduced. Therefore, depending on whether the flow rate difference value ΔQc before and after the decrease in flow rate matches any of the gas flow rates Qsti in the step control pattern C-3, that is, whether ΔQc = Qsti (i = 1 to n). , It is possible to determine the stoppage of the operation of the step device.

Even when the operation of the step equipment is stopped, the undershoot phenomenon does not appear, so that the gas flow rate pattern detected when the flow rate decreases is the above D-1 and D-.
It is preferable to confirm that the pattern is not two.

The above determination method (-1, -2)
Corresponds to Supplementary Note 22 and Supplementary Note 30 described later.

When the operation of the stepless control (proportional control) device is stopped (-3), since the flow rate does not decrease during operation, the D pattern does not appear during flow rate control, and the decreasing gas flow rate is a fixed flow rate. Since it is not a value, the flow rate difference value ΔQc before and after the decrease in flow rate cannot be used either. Therefore, as described below, in two cases, that is, (1) a stepless control (proportional control) instrument and another instrument are operating, and (2) a plurality of stepless control (proportional control) instruments If it is operating, it is judged by dividing into.

FIG. 17 is a diagram for explaining the flow rate decrease change patterns in the above cases (1) and (2). (1) When stepless control (proportional control) appliance and other appliances are in operation A plurality of gas appliances currently in operation are already known by the gas appliance determination method described in the present embodiment. Then, when the operation of the stepless control (proportional control) instrument is stopped while the stepless control (proportional control) instrument and other instruments are operating, the stepless control (proportional control) is performed after the flow rate decreases. ) The C-1 (proportional control) pattern of the stable period C peculiar to the device disappears, and the stable period C after the flow rate decrease change is a device other than the stepless control (proportional control) device (for example, fixed / semi-fixed device, The partial flow rate pattern of the stable period C of the step device) is obtained (see FIG. 17A). That is, by detecting that the partial flow rate pattern after the change in the flow rate is a pattern other than the C-1 pattern (for example, the C-2 and C-3 patterns), the operation of the stepless (proportional control) device is stopped. Can be determined.

The determination method (-3 (1)) is
This corresponds to Supplementary Note 23 and Supplementary Note 31 described later. (2) When a plurality of stepless control (proportional control) devices are operating When a plurality of stepless control (proportional control) devices are operating and one of them is stopped, the flow rate The C-1 (proportional control) pattern appears even after the decrease. Moreover, in this case, since the operation of the stepless control (proportional control) device is stopped, the D pattern is not detected when the flow rate decreases (see FIG. 17B). Therefore, when the flow rate decreases, D
It is possible to determine that the operation of the stepless (proportional control device) is stopped by detecting the C-1 pattern after the flow rate decrease change without detecting the -1, D-2 pattern.

The determination method (-3 (2)) is
This corresponds to Supplementary Note 24 and Supplementary Note 32 described later.

When the operation of the stepless control (non-proportional control) instrument (for example, the stove) is stopped (-4), the stepless control (non-proportional control) is not performed because it does not correspond to any of the above determination methods. Control) It is determined that the equipment has been stopped.

As described above, as in each of the determination methods shown in FIG. 16B, the partial flow rate pattern (C pattern (-1, -2, -1, -2, -3), or D pattern (-3, -4), etc.) is extracted from the registered appliance table to reduce the flow rate during operation, or the gas is stopped. The instrument can be determined.

[Gas appliance determination (O
N appliance determination) processing] FIG. 18 is a flowchart of a gas appliance determination (ON appliance determination) processing corresponding to a flow rate increase change. Predetermined flow rate increase change (ΔQ / Qave> 0.03, ΔQ
> 0 (see FIG. 14A)), the gas flow rate Q at each sampling timing after detection is detected.
Q '(t) described in FIG. 14A corresponding to (t) is obtained (S400).

Then, among the gas appliances registered in the registered appliance table, the registered appliance table displays "in operation (O
N) ”The partial flow rate pattern (A pattern) at the time of ignition A of the non-operating device that is not registered is compared with the gas flow rate pattern based on the obtained Q ′ (t) (S402). That is, it is determined whether or not a new gas appliance has been started (ON) by executing the determination method of FIG.

When the matching gas appliance is extracted in step S402, it is specified that the gas appliance has started operating (S416). When a plurality of matching gas appliances are extracted, Q ′ (t) is calculated according to the normal determination process of FIG.
One gas appliance is specified by comparing the gas flow rate pattern based on the above with the partial flow rate pattern (B pattern) of the initial transition period B and further the partial flow rate pattern (C pattern) of the stable period C.

In step S402, if the matching gas appliance is not extracted, the registered appliance table shows "in operation (O
N) ”Regarding registered gas appliances (operating appliances), maximum flow rate (Qmax) and minimum flow rate (Qmin) among multiple flow rates set as characteristic flow rates in stable period C
And a difference value (Qmax-Qmin) is calculated, and a gas appliance whose change flow rate of the gas flow rate pattern based on Q'is less than or equal to the difference value is extracted (S404). Specifically, a "flow rate change candidate sign" is set in the registered appliance table for the extracted gas appliance.

The difference value (Qmax-Qmin) of each gas appliance is
Since it is the maximum variable range flow rate of the gas appliance, Q '
The fact that the change flow rate of the gas flow rate pattern based on the above exceeds the difference value (Qmax-Qmin) of the gas appliance does not mean that the flow rate of the gas appliance increases. in this way,
The gas appliances that cannot cause the flow rate increase change of the gas flow rate pattern based on Q ′ were excluded from the judgment targets, and the flow rate increase change occurred during operation only for the gas appliances that may have caused the flow rate increase change. The determination accuracy can be improved by performing the following process of determining the gas appliance. This point corresponds to Appendix 11 described later.

In step S404, when no gas appliance is extracted (when there is no gas appliance for which the "flow rate change candidate sign" is set), a new gas appliance not registered in the registered appliance table is activated. It is determined that it has started, the new registration mode process of FIG. 12 is executed,
Identify the gas appliance (ON appliance) that has started operation (S41
8). This point corresponds to Appendix 10 described later.

In step S404, when at least one gas appliance is extracted (when there is at least one gas appliance to which the "flow rate change candidate sign" is set),
The gas flow rate pattern when the flow rate increases and changes based on Q ′ is compared with the partial flow rate pattern (D pattern) at the time of flow rate control D (S408). That is, the determination methods -3 and -4 of FIG.

In step S410, if a matching gas appliance is extracted, it is determined that the flow rate has increased during the operation of the gas appliance (S420).

In step S410, if no matching gas appliance is extracted, the pattern of the gas flow rate Qc 'in the stable period in Q' (t) and the partial flow pattern (C in the stable period C of the gas appliance in operation) are used. Pattern) is compared (S412). That is, the determination methods -1 and -2 of FIG.

In step S414, when the matching gas appliance is extracted, it is determined that the flow rate has increased during the operation of the gas appliance (S420).

In step S414, if the matching gas appliance is not extracted, the determination method of FIG.
The gas appliance cannot be extracted by any one of 1, 2, 3, and 4. In this case, it cannot be determined that the flow rate of the gas appliance registered as operating in the registered appliance table is increased. It has been determined that a new gas appliance that has not been registered in
The new registration mode process of No. 2 is executed, and the gas appliance whose operation has started is specified (S418).

FIG. 19 is a diagram showing a specific example of the gas appliance determination corresponding to the flow rate increase change according to the processing of FIG.

FIG. 19 shows an excerpt from the registered appliance table. As an example, in a gas appliance (ON appliance) in which the stove and the water heater are in operation, the table stove and fan heater are in inoperative status. Gas appliances (OFF appliances). In this state, when the flow rate increase change as shown in FIG. 19A is detected, step S402 in FIG.
Then, the gas flow rate pattern based on the obtained Q ′ matches the A-1 pattern at the time of ignition A (the characteristic flow rate 14
If it coincides with 00 kcal / h), it is determined in step S416 that the fan heater has started operating.

When an increase in the flow rate as shown in FIG. 19 (b) is detected, the matching gas appliance is not extracted in step S402 of FIG. 18, and the operating gas appliance ( Qmax of stove, water heater)
-By comparing Qmin with the flow rate Q '(20000 kcal / h) of the differential gas flow rate pattern when the flow rate increases and changes, the flow rate Q'determines that the maximum flow rate change range Qmax-
Since it exceeds Qmin, in step S406,
There is no gas appliance for which the "flow rate change candidate sign" is set. Therefore, in step S418, it is determined that the operation of a new gas appliance not registered in the registered appliance table has started.

Further, when a flow rate increase change as shown in FIG. 19C is detected, step S402 of FIG.
Then, the matching gas appliance is not extracted, and step S404 is performed.
Of operating gas appliances (stove, water heater) in Japan
By comparing x−Qmin with the flow rate Q ′ (20000 kcal / h) of the differential gas flow rate pattern when the flow rate increases, the “flow rate change candidate sign” is set in the water heater, and step S4
At 08, the gas flow rate pattern based on Q ′ matches the D-1 pattern of the partial flow rate pattern at the time of flow rate control D, and it is determined that the flow rate has increased during the operation of the water heater.

[Gas appliance (OFF)
Appliance) Determination Process] FIG. 20 is a flowchart of a gas appliance (OFF appliance) determination process corresponding to a decrease in flow rate.
Predetermined flow rate decrease change (ΔQ / Qave> 0.03, ΔQ <0
(See FIG. 14B)) is detected, the average flow rate Qave before the change in the flow rate decreases to the flow rate Qc in the stable period after the change in the flow rate.
Is subtracted to obtain the differential flow rate ΔQc (see FIG. 14B) (S500).

[0180] Then, in the registered equipment table, "in operation (O
N) ”Regarding registered gas appliances (ON appliances),
The maximum flow rate (Qmax) among a plurality of flow rates set as the characteristic flow rate in the stable period C is the difference flow rate ΔQc.
Extract larger gas appliances (S502). In particular,
A "candidate signature" is set in the registered appliance table for the extracted gas appliance.

Since the maximum gas flow rate Qmax of each gas appliance is the maximum decreasing range flow rate of that gas appliance, the differential flow rate ΔQ
When c exceeds the maximum flow rate Qmax of the gas appliance, it can be determined that it is not a decrease in the flow rate of the gas appliance. In this way, the gas appliances that cannot cause a decrease in the flow rate of ΔQc are excluded from the judgment targets, and the gas appliances that may have undergone a decrease in the flow rate among the operating gas appliances are narrowed down to the narrowed down gas appliances. Only for
The determination accuracy can be improved by performing the process of determining the gas appliance in which the flow rate decrease has occurred. This point corresponds to Supplementary Note 26 described later.

Furthermore, regarding the narrowed down gas appliances,
The minimum flow rate Qmin among a plurality of flow rates set as the characteristic flow rate of the stable period C is the stable period C after the change of the flow rate.
Whether there is a gas appliance larger than the flow rate Qc of (S50
4), if there is, the gas appliance stops operating (OFF)
The determination is made (S522).

For example, when the hot water supply and the stove are in operation and the flow rate Qc after the decrease in flow rate is 2000 kcal / h, the minimum flow rate Qmin of the hot water supply is 3000 kcal / h, so the hot water supply is operated. Since it cannot be present, it can be determined that the operation of the water heater has stopped. This point corresponds to Supplementary Note 27 described later.

In step S504, when there is no target gas appliance, the gas flow rate (Q) pattern when the flow rate is decreased and the partial flow rate pattern (D pattern) when the flow rate is controlled are selected for the narrowed down gas appliance. Are compared (S50
6). That is, the determination method-3, -of FIG.
Carry out 4.

In step S506, when the matching gas appliance is extracted, it is determined that the flow rate has decreased during the operation of the gas appliance (S524).

If the matching gas appliance is not extracted in step S506, it is next determined whether or not the narrowed gas appliance (set with the candidate signature) has a proportional control appliance (S508).

In step S508, when there is a proportional control device, the gas flow rate pattern of the stable period C detected after the flow rate decrease is the partial flow pattern of the stable period C of the proportional control device, that is, the C-1 pattern. It is determined whether or not (S512). That is, the determination method-3 in FIG. 16B is performed.

In S514, when the detected gas flow rate pattern in the stable period C is other than the C-1 pattern (C-
(2, C-3 pattern), it is determined that the operation of the proportional control device is stopped (S526). Stable period C of proportional control equipment
Since the partial flow rate pattern (C-1 pattern) of No. has disappeared, it can be determined that the operation of this proportional control device is stopped.

If there is no proportional control device in step S510, or if the gas flow rate pattern of the stable period C detected in step S514 is the C-1 pattern, the differential flow rate ΔQc and the gas instrument in operation are checked. The characteristic flow rate in the partial flow rate pattern (C pattern) in the stable period C is compared (S516). That is, FIG. 16B
The determination methods -1, -2, -1, and -2 are performed. As described above, the determination method-1 in FIG.
-2, the difference flow rate ΔQc is compared with the difference value between the two characteristic flow rates, and if there is a gas appliance that matches this (S518), the flow rate reduction during operation of the gas appliance is performed by step S520. (S530). Also, FIG.
In the determination methods -1 and -2 of 6 (b), the differential flow rate ΔQ
c is compared with the characteristic flow rate itself, and if there is a matching gas appliance (S518), step S52 is performed.
From 0, it is determined that the gas appliance has stopped operating (S5
28).

Further, in S518, if none of them match, it is determined that the operation of the table stove has been stopped (S532). That is, the determination method of FIG.
4 is carried out.

FIG. 21 is a diagram showing a specific example of gas appliance determination corresponding to the flow rate decrease change according to the processing of FIG.

FIG. 21 shows an excerpt of the registered appliance table. As an example, the stove, the water heater, and the stove are in the operating state (ON), and the fan heater is in the non-operating state (OFF). In this state, when the flow rate decrease change as shown in FIG. 21A is detected, the differential flow rate ΔQc and the maximum flow rate in the stable period C of the operating gas appliance (ON appliance) are calculated in step S502 of FIG. Qmax is compared, and "candidate sign" is set on the water heater and the table stove. That is, the gas appliances that have undergone a decrease in the flow rate are narrowed down to the water heater or the table stove. Further, in step S504, the flow rate Qc in the stable period C after the change in the flow rate is compared with the minimum flow rate Qmin in the stable period C of the water heater and the table stove, and the flow rate Qc is smaller than the minimum flow rate Qmin of the water heater. In step S522, it is determined that the operation of the water heater has been stopped (OFF).

When a decrease in the flow rate as shown in FIG. 21B is detected, in step S502 of FIG.
The differential flow rate ΔQc and the maximum flow rate Qmax in the stable period C of the operating gas appliance are compared, and the “candidate sign” is set for the stove, the water heater, the table stove (all the operating gas appliances). Further, in step S504, the flow rate Qc in the stable period C after the change in the flow rate is compared with the minimum flow rate Qmin in the stable period C of the stove, the water heater, and the table stove in which the "candidate sign" is set, and the flow rate Qc <
Since there is no gas appliance with the minimum flow rate Qmin, in step S506, the gas flow rate pattern when the flow rate is changed and the partial flow rate pattern (D pattern) of the flow rate control D are compared, and the D-2 pattern of them is determined. By matching,
It is determined that the flow rate has decreased during operation of the stove.

Further, when a decrease in flow rate as shown in FIG. 21C is detected, step S502 in FIG.
Then, the differential flow rate ΔQc is compared with the maximum flow rate Qmax in the stable period C of the operating gas appliance, and the “candidate sign” is set for the stove, the water heater, the table stove (all operating gas appliances). Further, in step S504,
Flow rate Qc in the stable period C after the decrease in flow rate and "candidate sign"
The minimum flow rate Qmin in the stable period C of the stove, the water heater and the table stove in which is set is compared. Flow rate Q
Since there is no gas appliance with c <minimum flow rate Qmin, in step S506, the gas flow rate pattern when the flow rate decreases and the partial flow rate pattern (D pattern) during the flow rate control D are compared. Since neither the D-1 pattern nor the D-2 pattern matches in step S508, the presence or absence of the proportional control device is determined in step S510. Since the water heater is operating, in step S512,
It is determined whether or not the stable period C after the change in the flow rate is the C-1 pattern.
The process proceeds to step S516. At this point, it is determined that the flow rate is not decreased during the operation of the water heater. In step S516, the differential flow rate ΔQc (1400 kcal
/ h) is compared with the characteristic flow rate (or its difference value) in the partial flow rate pattern (C pattern) in the stable period C of the stove and the stove. Then, if the difference value (QH-QL) between the fixed flow rates QH and QL of the stove matches ΔQc, it can be determined that the flow rate has decreased during the operation of the stove (S530).

In the above judgment, when it is judged that the flow rate is increased or decreased, the safety continuous operation time set for the gas appliance is not reset, and the safety continuous operation time from the start of operation is continued. Continue operation monitoring.

When it is determined to start the operation of a new gas appliance, the operation monitoring mode of FIG. 13 is used to monitor the operation of the gas appliance based on the safe continuous operation time.

When it is determined that the operation of the gas appliance in operation is stopped, the operation monitoring mode of FIG. 13 ends the operation monitoring based on the safe continuous operation time of the gas appliance.

FIG. 22 is a schematic configuration diagram of a gas appliance determination device according to another embodiment. FIG. 2 shows the configuration of a gas meter provided with a gas meter control unit having a gas appliance determination function.
100 does not have the function of a gas meter that integrates the gas flow rate,
Gas appliance determination control unit 124 with gas appliance determination function
Based on the gas flow rate detected by the gas flow rate detection means 20, the gas appliance is determined by the same method as described above. Then, the gas shutoff valve 22 is shut off as necessary. The gas appliance determination control unit 124 is realized by, for example, a microcomputer. The other configuration of FIG. 22 is the same as that of the gas meter of FIG. 2, and the same reference number is attached.

FIG. 23 is a block diagram of the gas appliance determination control unit 124 incorporated in the gas appliance determination device of FIG. Since the gas appliance determination device 100 does not have the function of integrating and displaying the gas flow rates, the gas appliance determination control unit 124 also omits the gas flow rate integration module 40 from the configuration of FIG. 4. The other configuration is the same as that of FIG.

The gas appliance determination device shown in FIG. 22 is attached to the gas supply line separately from the gas meter and can determine the gas appliance in operation. Then, necessary operation monitoring or the like can be performed on the determined gas appliance.

Note that the gas meter control unit of the gas meter of FIG. 2 and the gas appliance determination control unit of FIG. 22 alone constitute the gas appliance determination device of the present invention by being supplied with the detected gas flow rate from the gas flow rate detection means. To do.

The gas flow rate pattern and the partial flow rate pattern of the gas appliance described above are merely examples, and the present invention is not limited thereto. In the above-described embodiment, the control steps include ignition, initial transition period, stable period,
(And at the time of flow rate control), but other divisions can be made. Further, the characteristic data used as an index of matching between the detected flow rate pattern and the partial flow rate pattern of the flow rate pattern table is also an example, and other characteristic data may be used. Furthermore, other matching techniques may be used. For example, the gas flow rate waveform itself may be matched using a pattern matching technique used for voice recognition or the like (for example, a dynamic programming method in which matching is performed by moving the time axis).

In the above embodiment, a series of gas flow rate patterns generated by combustion control is divided into partial flow rate patterns for each control step, and the flow rate patterns are matched for each control step. Therefore, since the matching of the partial flow rate patterns is simplified, the detection becomes easy, and the detection accuracy and the detection probability can be increased. Then, since the gas appliance is determined from the combination of the partial flow rate patterns that match in a plurality of control steps, the detection becomes easy.

The following is a summary of the present embodiment as described above.

(Supplementary Note 1) In a gas appliance determination device for determining a gas appliance connected to a gas supply line, a partial flow pattern obtained by dividing a series of gas flow patterns generated by combustion control for a plurality of types of gas appliances. , A flow rate pattern table classified for each control step, an appliance table in which a plurality of types of gas appliances and combinations of the partial flow rate patterns corresponding thereto are associated with each other, and a predetermined value detected during operation of at least one gas appliance. The partial flow rate pattern that matches the gas flow rate pattern with the increase in the flow rate of is extracted from the flow rate pattern table, and the operating gas appliance or the gas appliance that has started operation that matches the extracted partial flow rate pattern, And a gas appliance determination device for extracting from the appliance table. .

(Supplementary Note 2) In Supplementary Note 1, the plurality of control steps include at least ignition, a stable period thereafter, and flow rate control during the stable period.

(Supplementary note 3) In the supplementary note 1 or 2, the increase in the flow rate is a change that increases by a predetermined ratio or more with respect to the average flow rate for a certain period before the change.

(Supplementary Note 4) In Supplementary Note 2, the device determining means decreases the flow rate within a predetermined time range from the flow rate increase change, and the decrease amount is a predetermined ratio with respect to the increase amount of the flow rate increase change. In the above case, the gas appliance determination device is characterized by determining the partial flow rate pattern during the flow rate control.

(Supplementary Note 5) In Supplementary Note 2, when the appliance determining means extracts the partial flow rate pattern at the time of the flow rate control as the matching partial flow rate pattern, the operating gas appliance corresponding to the partial flow rate pattern is extracted. A gas appliance determination device characterized by determining that an increase in flow rate has occurred.

(Supplementary Note 6) In Supplementary Note 2, in the appliance determining means, the flow rate change amount of the detected gas flow rate pattern is a difference value between a plurality of gas flow rates corresponding to the partial flow rate pattern in the stable period. Is detected, it is determined that the gas appliance in operation corresponding to the partial flow rate pattern has caused the flow rate increase change.

(Supplementary Note 7) In Supplementary Note 2, when the appliance determining means extracts the partial flow rate pattern at the time of ignition as the matching partial flow rate pattern, it is determined that the gas appliance corresponding to the partial flow rate pattern has started operation. A gas appliance determination device characterized by:

(Supplementary Note 8) In Supplementary Note 2, the appliance determining means is a gas flow rate pattern accompanied by the flow rate increase change, wherein the gas flow rate pattern regarding the difference between the gas flow rates before and after the flow rate increase change is the ignition. A gas appliance determination device characterized by determining that the gas appliance corresponding to the partial flow rate pattern has started when it matches with the partial flow rate pattern at that time.

(Supplementary Note 9) In Supplementary Note 7 or 8, when the appliance determination means detects a plurality of gas appliances corresponding to the partial flow rate pattern at the time of ignition as the matching partial flow rate pattern, after the ignition time has elapsed. The gas appliance determination device characterized by identifying one gas appliance that matches at least one partial flow rate pattern corresponding to the control step, and determining that the identified gas appliance has started to operate.

(Supplementary Note 10) In Supplementary Note 1, the appliance determining means determines that the flow rate change amount of the detected gas flow rate pattern is based on the difference value between the maximum gas flow rate and the minimum gas flow rate of each gas appliance in the appliance table. A gas appliance determination device characterized by determining that a new gas appliance not set in the appliance table has been operated when it is detected to be large.

(Supplementary Note 11) In Supplementary Note 1, the appliance determining means is one of the gas appliances in the appliance table.
The difference between the maximum gas flow rate and the minimum gas flow rate of each gas appliance is greater than the flow rate change amount of the detected gas flow rate pattern from among the gas appliances, and the operating gas appliance or the running gas appliance that has increased the flow rate. A gas appliance determination device characterized by extracting a started gas appliance.

(Supplementary Note 12) In a gas appliance determination device for determining a gas appliance connected to a gas supply line, a partial flow rate pattern obtained by dividing a series of gas flow rate patterns generated by combustion control for a plurality of types of gas appliances. , At least at the time of ignition, a stable period after that, a flow rate pattern table classified for each control step having a flow rate control time in the stable period, a combination of a plurality of types of gas appliances and the partial flow rate pattern corresponding thereto, When it is detected that the gas flow rate pattern with a predetermined flow rate increase and change detected during operation of at least one gas appliance is matched with the partial flow rate pattern at the time of flow rate control, An appliance determination means for determining that the gas appliance in operation corresponding to the flow rate pattern has caused the flow rate increase change. Gas appliance determination unit, characterized in that it comprises.

(Supplementary Note 13) In a gas appliance determination device for determining a gas appliance connected to a gas supply line, a partial flow pattern obtained by dividing a series of gas flow patterns generated by combustion control for a plurality of types of gas appliances. , At least at the time of ignition, a stable period after that, a flow rate pattern table classified for each control step having a flow rate control time in the stable period, a combination of a plurality of types of gas appliances and the partial flow rate pattern corresponding thereto, And a plurality of gas flow rates corresponding to the partial flow rate pattern in the stable period, the flow rate change amount of the gas flow rate pattern with a predetermined flow rate increase change detected during operation of at least one gas appliance. When it is detected that the difference value of
A gas appliance determination device, comprising: an appliance determination unit that determines that an operating gas appliance corresponding to the partial flow rate pattern has caused the flow rate increase change.

(Supplementary Note 14) In a gas appliance determination device for determining a gas appliance connected to a gas supply line, a partial flow pattern obtained by dividing a series of gas flow patterns generated by combustion control for a plurality of types of gas appliances. , At least at the time of ignition, a stable period after that, a flow rate pattern table classified for each control step having a flow rate control time in the stable period, a combination of a plurality of types of gas appliances and the partial flow rate pattern corresponding thereto, When it is detected that the gas flow rate pattern with a predetermined flow rate increase and change detected during the operation of at least one gas appliance is matched with the partial flow rate pattern at the time of ignition, the partial flow rate concerned is detected. A gas appliance determination device characterized by determining that a gas appliance corresponding to a pattern has been started.

(Supplementary note 15) In a gas appliance determination device for determining a gas appliance connected to a gas supply line, a partial flow pattern obtained by dividing a series of gas flow patterns generated by combustion control for a plurality of types of gas appliances. , At least at the time of ignition, a stable period after that, a flow rate pattern table classified for each control step having a flow rate control time in the stable period, a combination of a plurality of types of gas appliances and the partial flow rate pattern corresponding thereto, And a gas flow pattern with a predetermined flow rate increase detected during operation of at least one gas appliance, wherein the gas flow rate pattern is the difference between the gas flow rates before and after the flow rate increase change. However, if the partial flow rate pattern at the time of ignition is matched, the gas appliance corresponding to the partial flow rate pattern is activated. Gas appliance determination unit and judging to have been started.

(Supplementary Note 16) In a gas appliance determination device for determining a gas appliance connected to a gas supply line, a partial flow rate pattern obtained by dividing a series of gas flow rate patterns generated by combustion control for a plurality of types of gas appliances. , A flow rate pattern table classified for each control step, an appliance table in which a plurality of types of gas appliances and combinations of the partial flow rate patterns corresponding thereto are associated with each other, and a predetermined value detected during operation of the plurality of gas appliances. Partial flow rate pattern that matches the gas flow rate pattern with flow rate decrease
A gas characterized by comprising an appliance determination means for extracting from the appliance table an operating gas appliance or an inactive gas appliance that is extracted from the flow rate pattern table and matches the extracted partial flow rate pattern. Instrument determination device.

(Supplementary Note 17) In Supplementary Note 16, the gas appliance determining apparatus is characterized in that the plurality of control steps include at least ignition, a stable period thereafter, and flow rate control in the stable period.

(Supplementary Note 18) In Supplementary Note 16, the gas flow rate decrease change is a change in which the change in flow rate decreases by a predetermined ratio or more with respect to the average flow rate for a predetermined time period before change.

(Supplementary Note 19) In Supplementary Note 17, the device determining means increases the flow rate within a predetermined time range from the flow rate decrease change, and the increase amount is a predetermined ratio with respect to the decrease amount of the flow rate decrease change. In the above case, the gas appliance determination device is characterized by determining the partial flow rate pattern during the flow rate control.

(Supplementary Note 20) In Supplementary Note 17, when the appliance determining means extracts a partial flow rate pattern during the flow rate control as a partial flow rate pattern that matches the detected gas flow rate pattern, it corresponds to the partial flow rate pattern. A gas appliance determination device, characterized in that it is determined that the gas appliance in operation that has undergone the flow rate decrease change.

(Supplementary Note 21) In Supplementary Note 17, the appliance determining means is such that the flow rate change amount of the detected gas flow rate pattern is a difference value between a plurality of gas flow rates corresponding to the partial flow rate pattern in the stable period. Is detected, it is determined that the gas appliance in operation corresponding to the partial flow rate pattern has caused the flow rate decrease change.

(Supplementary Note 22) In Supplementary Note 17, when the appliance determining means detects that the flow rate change amount of the detected gas flow rate pattern is the gas flow rate corresponding to the partial flow rate pattern in the stable period, A gas appliance determination device characterized by determining that the operation of a gas appliance has been stopped.

(Supplementary Note 23) In Supplementary Note 17, a gas appliance having a partial flow rate pattern in which the partial flow rate pattern in the stable period corresponds to proportional control, and a gas appliance having a partial flow rate pattern corresponding to non-proportional control that is not the proportional control. When a gas flow rate pattern accompanied by the flow rate decrease change is detected during operation of and, the appliance determination means determines that the gas flow rate pattern detected after the flow rate decrease change corresponds to the non-proportional control. Is detected, it is determined that the operation of the gas appliance having the partial flow rate pattern corresponding to the proportional control is stopped.

(Supplementary Note 24) In Supplementary Note 17, the gas flow rate pattern accompanied by the decrease in flow rate is detected while a plurality of gas appliances whose partial flow rate patterns in the stable period are gas flow rate patterns corresponding to proportional control are in operation. In this case, the appliance determination means does not extract the partial flow rate pattern at the time of the flow rate control as the partial flow rate pattern matching the detected gas flow rate pattern, and the gas flow rate pattern detected after the decrease in the flow rate. When it is detected that the gas flow rate pattern corresponds to the proportional control, it is determined that one of the plurality of gas appliances has stopped operating.

(Supplementary Note 25) In Supplementary Note 23 or 24,
The appliance determination means is a gas flow rate detected at a predetermined sampling timing, and the difference between the maximum value and the minimum value of the gas flow rate detected in a predetermined constant period is equal to or more than a first reference value, and the gas flow rate is continuous. A gas appliance determination device, characterized in that when the difference in gas flow rates detected by the above is less than or equal to a second reference value, the gas flow rate pattern for proportional control in the stable period is determined.

(Supplementary note 26) In Supplementary note 16, the appliance determining means determines that among the plurality of operating gas appliances in the appliance table, the flow rate change amount of the detected gas flow rate pattern is the plurality of operating gas appliances. The gas appliance determination device for extracting a gas appliance in operation or a gas appliance whose operation has stopped due to the decrease in the flow rate from gas appliances smaller than the maximum gas flow rate of each gas appliance.

(Supplementary Note 27) In Supplementary Note 16, the appliance determining means extracts, from the plurality of operating gas appliances in the appliance table, a gas appliance having a minimum gas flow rate higher than the gas flow rate after the flow rate decrease. Then, the gas appliance determination device is characterized by determining that the operation of the gas appliance is stopped.

(Supplementary note 28) In a gas appliance determination device for determining a gas appliance connected to a gas supply line, a partial flow pattern obtained by dividing a series of gas flow patterns generated by combustion control for a plurality of types of gas appliances. , At least at the time of ignition, a stable period after that, a flow rate pattern table classified for each control step having a flow rate control time in the stable period, a combination of a plurality of types of gas appliances and the partial flow rate pattern corresponding thereto, When it is detected that the gas flow rate pattern with a predetermined flow rate decrease detected during the operation of the gas table and the appliance table associated with each other matches the partial flow rate pattern during the flow rate control, the partial flow rate pattern concerned is detected. And an instrument determining means for determining that the gas instrument in operation corresponding to the above has caused the decrease in flow rate. Gas appliance determination apparatus according to symptoms.

(Supplementary note 29) In a gas appliance determination device for determining a gas appliance connected to a gas supply line, a partial flow pattern obtained by dividing a series of gas flow patterns generated by combustion control for a plurality of types of gas appliances. , At least at the time of ignition, a stable period after that, a flow rate pattern table classified for each control step having a flow rate control time in the stable period, a combination of a plurality of types of gas appliances and the partial flow rate pattern corresponding thereto, The flow rate change amount of the gas flow rate pattern associated with the appliance table in which the plurality of gas appliances are associated with the predetermined flow rate decrease change during the operation of the plurality of gas appliances is the plurality of gas flow rates corresponding to the partial flow rate pattern in the stable period. When it is detected that the difference is the difference value, it is determined that the gas appliance in operation corresponding to the partial flow pattern has caused the decrease in flow rate. Gas appliance determination unit, characterized in that it comprises an instrument determination means for.

(Supplementary Note 30) In a gas appliance determination device for determining a gas appliance connected to a gas supply line, a partial flow pattern obtained by dividing a series of gas flow patterns generated by combustion control for a plurality of types of gas appliances. , At least at the time of ignition, a stable period after that, a flow rate pattern table classified for each control step having a flow rate control time in the stable period, a combination of a plurality of types of gas appliances and the partial flow rate pattern corresponding thereto, It is confirmed that the flow rate change amount of the gas flow rate pattern with a predetermined flow rate decrease change detected during operation of the appliance table and the plurality of gas appliances associated with is the gas flow rate corresponding to the partial flow rate pattern in the stable period. A gas appliance determination device comprising a appliance determination means for determining that the operation of the gas appliance has been stopped when detected.

(Supplementary Note 31) In a gas appliance determination device for determining a gas appliance connected to a gas supply line, a partial flow pattern obtained by dividing a series of gas flow patterns generated by combustion control for a plurality of types of gas appliances. , At least at the time of ignition, a stable period after that, a flow rate pattern table classified for each control step having a flow rate control time in the stable period, a combination of a plurality of types of gas appliances and the partial flow rate pattern corresponding thereto, , A gas table having a partial flow pattern in which the partial flow pattern in the stable period corresponds to proportional control, and a gas appliance having a partial flow pattern corresponding to non-proportional control that is not proportional control are operated. In the case where a gas flow rate pattern accompanied by a predetermined flow rate decrease change is detected, the device determination means is A device that determines that the gas appliance having the partial flow pattern corresponding to the proportional control is stopped when it is detected that the gas flow pattern detected after the change in the volume decrease is the gas flow pattern corresponding to the non-proportional control. A gas appliance determination device comprising: a determination unit.

(Supplementary Note 32) In a gas appliance determination device for determining a gas appliance connected to a gas supply line, a partial flow pattern obtained by dividing a series of gas flow patterns generated by combustion control for a plurality of types of gas appliances. , At least at the time of ignition, a stable period after that, a flow rate pattern table classified for each control step having a flow rate control time in the stable period, a combination of a plurality of types of gas appliances and the partial flow rate pattern corresponding thereto, When a plurality of gas appliances are associated with the appliance table, the partial flow rate pattern in the stable period is a gas flow rate pattern corresponding to proportional control, when a gas flow rate pattern accompanied by the flow rate decrease change is detected, The appliance determination means is configured as a partial flow rate pattern that matches the detected gas flow rate pattern. When the partial flow rate pattern at the time of flow rate control is not extracted and the gas flow rate pattern detected after the decrease in the flow rate is a gas flow rate pattern corresponding to the proportional control, among the plurality of gas appliances, A gas appliance determination device characterized by determining that one of the operations has been stopped.

(Supplementary Note 33) In any one of Supplementary Notes 1 to 32, further, regarding the gas appliance judged by the appliance judging means, when the gas flow rate is detected over a predetermined time limit, a gas shutoff or an alarm output is given. A gas appliance determination device having an operation monitoring means for performing a safety operation including the operation.

(Supplementary Note 34) In Supplementary Note 33, the gas appliance determining apparatus is characterized in that the time limit is set for each gas appliance.

(Supplementary Note 35) In Supplementary Note 33 or 34,
The gas appliance determination device, wherein the operation monitoring means continues to monitor the time limit even if the detected gas flow rate fluctuates.

(Supplementary note 36) In any one of supplementary notes 1 to 35, further, there is a gas flow rate detecting means installed in the gas supply line, and the appliance determining means is a gas flow rate value from the gas flow rate detecting means. A gas appliance determination device characterized by being supplied.

(Supplementary note 37) The gas appliance determination device according to any one of supplementary notes 1 to 36, the gas flow rate detecting means installed in the gas supply line, and the gas flow rate detected by the gas flow rate detecting means are A gas meter having a gas flow rate integrating means for integrating.

[0242]

As described above, according to the present invention, the operating gas appliance can be easily determined from the change in the detected gas flow rate. Therefore, optimal operation monitoring can be performed for the determined gas appliance.

In particular, (1) a gas appliance corresponding to a change in gas flow rate during operation of at least one gas appliance,
(2) It is possible to accurately determine a gas appliance corresponding to a decrease in gas flow rate during operation of a plurality of gas appliances.

[Brief description of drawings]

FIG. 1 is a diagram showing a set value of a conventional safety continuous operation time (limit time) used for shutting off when the safety continuous operation time is over.

FIG. 2 is a schematic configuration diagram of a gas meter in the present embodiment example.

FIG. 3 is a schematic diagram illustrating an operation of the gas meter according to the present embodiment.

FIG. 4 is a configuration diagram of a gas meter control unit in the present embodiment example.

FIG. 5 is a diagram showing an example of gas flow patterns in a plurality of gas appliances.

FIG. 6 is a diagram showing an example of a partial flow rate pattern at the time of ignition of a flow rate pattern table.

FIG. 7 is a diagram showing an example of a partial flow rate pattern at the initial transition of the flow rate pattern table.

FIG. 8 is a diagram showing an example of a partial flow rate pattern in a stable period of the flow rate pattern table.

FIG. 9 is a chart showing an example of a new appliance table in the present embodiment.

FIG. 10 is a chart showing an example of a registered appliance table in the present embodiment.

FIG. 11 is a determination flowchart (normal determination mode) in the gas appliance determination module according to the present embodiment.

FIG. 12 is a determination flowchart (new registration mode) in the gas appliance determination module according to the present embodiment.

FIG. 13 is a flowchart of a driving monitoring mode.

FIG. 14 is a diagram illustrating the definition of a flow rate increase change (a) or a flow rate decrease change (b) during operation of a gas appliance.

FIG. 15 is a diagram illustrating a partial flow rate pattern during flow rate control D in the stable period.

FIG. 16 is a diagram illustrating an outline of a gas appliance determination method corresponding to a flow rate change.

FIG. 17 is a diagram illustrating a flow rate decrease change pattern when the operation of the stepless control (proportional control) device is stopped.

FIG. 18 is a flowchart of a gas appliance determination process corresponding to an increase in flow rate.

FIG. 19 is a diagram showing a specific example of gas appliance determination corresponding to a flow rate increase change according to the process of FIG. 18.

FIG. 20 is a flowchart of gas appliance determination processing corresponding to a flow rate decrease change.

21 is a diagram showing a specific example of gas appliance determination corresponding to a flow rate decrease change according to the process of FIG. 20. FIG.

FIG. 22 is a schematic configuration diagram of a gas appliance determination device according to the present embodiment.

23 is a configuration diagram of a gas appliance determination control unit 124 incorporated in the gas appliance determination device of FIG.

[Explanation of symbols]

10 gas meters 18 gas appliances 20 Gas flow rate detection means 43 Gas appliance determination module 50 Flow rate pattern table 52 New Instrument Table 54 registered equipment table 56 Operation monitoring module

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) G08B 21/24 G08B 21/24 (72) Inventor Kazuto Otakane 1-5-20 Kaigan, Minato-ku, Tokyo Tokyo Gas Incorporated (72) Inventor Tatsuo Fujimoto 1-5-20 Kaigan, Minato-ku, Tokyo Tokyo Gas Co., Ltd. (72) Inventor Katsuto Sakai 1-5-20 Kaigan, Minato-ku, Tokyo Tokyo Gas Co., Ltd. (72) Kenichiro Yuasa, 1-5-20 Kaigan, Minato-ku, Tokyo, Tokyo Gas Co., Ltd. (72) Hiroshi Matsushita 4-1-2, Hiranocho, Chuo-ku, Osaka City, Osaka Prefecture Osaka Gas Co., Ltd. ( 72) Inventor Shuichi Okada 4-1-2 Hirano-cho, Chuo-ku, Osaka-shi, Osaka Prefecture Osaka Gas Co., Ltd. (72) Inventor Shigeru Tagawa 4-1-2 Hirano-cho, Chuo-ku, Osaka-shi, Osaka Osaka Gas Co., Ltd. (72) Inventor Atsuko Kadowaki 4-1-2, Hirano-cho, Chuo-ku, Osaka City, Osaka Prefecture Osaka Gas Co., Ltd. (72) Inventor, Tree Yukio 507-2, Shinho-cho, Tokai-shi, Aichi Toho Gas Co., Ltd. (72) Inventor Toru Hiroyama 507-2, Shinho-cho, Tokai-shi, Aichi F-term in Toho Gas Co., Ltd. (reference) 2F030 CB01 CC13 CF05 CF11 3K003 AA07 AB03 AB06 AC02 AC07 BA04 BC00 BC09 CC04 5C086 AA02 BA01 BA11 CA30 DA08

Claims (37)

[Claims] 1. A gas appliance determination device for determining a gas appliance connected to a gas supply line, wherein a partial flow rate pattern obtained by dividing a series of gas flow rate patterns generated in accordance with combustion control for a plurality of types of gas appliances, A flow rate pattern table classified for each control step, an appliance table in which a plurality of types of gas appliances are associated with combinations of the partial flow rate patterns corresponding thereto, and a predetermined flow rate detected during operation of at least one gas appliance A partial flow rate pattern that matches a gas flow rate pattern with an increasing change is extracted from the flow rate pattern table, and an operating gas appliance or an activated gas appliance that matches the extracted partial flow rate pattern is set to the appliance table. A gas appliance determination device, comprising: an appliance determination means for extracting from the gas appliance. 2. The gas appliance determination device according to claim 1, wherein the plurality of control steps include at least ignition time, a stable period thereafter, and flow rate control time in the stable period. 3. The gas appliance determination device according to claim 1, wherein the flow rate increase change is a change that increases by a predetermined ratio or more with respect to the average flow rate for a predetermined time period before the change. 4. The instrument determining means according to claim 2, wherein the flow rate decreases within a predetermined time range from the flow rate increase change, and the decrease amount is a predetermined rate or more with respect to the flow rate increase change increase amount. In this case, the gas appliance determination device is characterized by determining the partial flow rate pattern during the flow rate control. 5. The apparatus according to claim 2, wherein the appliance determining unit extracts the partial flow rate pattern during the flow rate control as the matching partial flow rate pattern, and the gas appliance in operation corresponding to the partial flow rate pattern has the flow rate. A gas appliance determination device characterized by determining that an increase has occurred. 6. The apparatus according to claim 2, wherein the appliance determining means determines that the flow rate change amount of the detected gas flow rate pattern is a difference value of a plurality of gas flow rates corresponding to the partial flow rate pattern in the stable period. When detected,
A gas appliance determination device, characterized in that it is determined that an operating gas appliance corresponding to the partial flow rate pattern has caused the flow rate increase change. 7. The apparatus according to claim 2, wherein the appliance determination unit extracts the partial flow rate pattern at the time of ignition as the matching partial flow rate pattern,
A gas appliance determination device characterized by determining that the operation of a gas appliance corresponding to the partial flow rate pattern has been started. 8. The apparatus according to claim 2, wherein the appliance determining means is a gas flow rate pattern accompanied by the flow rate increase change, wherein the gas flow rate pattern regarding a difference between the gas flow rate before and after the flow rate increase change is the ignition timing. The gas appliance determination device is characterized by determining that the gas appliance corresponding to the partial flow pattern has been started when it matches with the partial flow pattern. 9. The apparatus according to claim 7 or 8, wherein the appliance determination means detects a plurality of gas appliances corresponding to the partial flow rate pattern at the time of ignition as a matching partial flow rate pattern, and after the ignition time has elapsed. A gas appliance determination device characterized by identifying one gas appliance that matches at least one partial flow rate pattern corresponding to a control step, and determining that the identified gas appliance has started operation. 10. The appliance determination means according to claim 1, wherein the flow rate change amount of the detected gas flow rate pattern is larger than a difference value between the maximum gas flow rate and the minimum gas flow rate of each gas appliance in the appliance table. When it is detected, it is determined that a new gas appliance which is not set in the appliance table has been operated, and a gas appliance determination device. 11. The gas appliance determination means according to claim 1, wherein a difference value between the maximum gas flow rate and the minimum gas flow rate of each gas appliance among the gas appliances in the appliance table is a value of the detected gas flow rate pattern. A gas appliance determination device characterized by extracting, from gas appliances larger than a flow rate change amount, a gas appliance in operation that has caused the flow rate increase change or a gas appliance that has started operation. 12. A gas appliance determination device for determining a gas appliance connected to a gas supply line, wherein a partial flow rate pattern obtained by dividing a series of gas flow rate patterns generated with combustion control for a plurality of types of gas appliances, Corresponds to a flow rate pattern table classified at every control step having at least ignition time, a stable period after that, and a flow rate control time in the stable period, and a combination of a plurality of types of gas appliances and the partial flow rate patterns corresponding thereto. When it is detected that the attached appliance table and the gas flow rate pattern with a predetermined flow rate increase / decrease detected during operation of at least one gas appliance match the partial flow rate pattern during the flow rate control, the partial flow rate pattern concerned is detected. And a device determination means for determining that the gas device in operation corresponding to the above has caused the increase in flow rate. Gas appliance determination unit and said and. 13. A gas appliance determination device for determining a gas appliance connected to a gas supply line, wherein a partial flow rate pattern obtained by dividing a series of gas flow rate patterns generated in association with combustion control for a plurality of types of gas appliances, Corresponds to a flow rate pattern table classified at every control step having at least ignition time, a stable period thereafter, and a flow rate control time in the stable period, and a combination of a plurality of types of gas appliances and the partial flow rate patterns corresponding thereto. The attached instrument table and the flow rate change amount of the gas flow rate pattern with a predetermined flow rate increase change detected during the operation of at least one gas appliance are the differences between the plurality of gas flow rates corresponding to the partial flow rate pattern in the stable period. When it is detected that the value is a value, it means that the gas appliance in operation corresponding to the partial flow rate pattern has caused the flow rate increase change. Gas appliance determination apparatus characterized by comprising a device determination means for constant. 14. A gas appliance determination device for determining a gas appliance connected to a gas supply line, wherein a partial flow rate pattern obtained by dividing a series of gas flow rate patterns generated with combustion control for a plurality of types of gas appliances, Corresponds to a flow rate pattern table classified at every control step having at least ignition time, a stable period after that, and a flow rate control time in the stable period, and a combination of a plurality of types of gas appliances and the partial flow rate patterns corresponding thereto. When it is detected that the attached appliance table and the gas flow rate pattern with a predetermined flow rate increase / decrease detected during operation of at least one gas appliance match the partial flow rate pattern at the time of ignition, the partial flow rate pattern is detected. A gas appliance determination device, characterized by determining that the corresponding gas appliance has started operation. 15. A gas appliance determination device for determining a gas appliance connected to a gas supply line, wherein a partial flow rate pattern obtained by dividing a series of gas flow rate patterns generated with combustion control for a plurality of types of gas appliances, Corresponds to a flow rate pattern table classified at every control step having at least ignition time, a stable period after that, and a flow rate control time in the stable period, and a combination of a plurality of types of gas appliances and the partial flow rate patterns corresponding thereto. Attached equipment table, a gas flow rate pattern with a predetermined flow rate increase change detected during operation of at least one gas appliance, the gas flow rate pattern of the difference between the gas flow rate before and after the flow rate increase change, If it matches the partial flow pattern at the time of ignition, the gas appliance corresponding to the partial flow pattern will start operating. Gas appliance determination unit and judging that. 16. A gas appliance determination device for determining a gas appliance connected to a gas supply line, wherein a partial flow rate pattern obtained by dividing a series of gas flow rate patterns generated with combustion control for a plurality of types of gas appliances, A flow rate pattern table classified for each control step, a device table in which a plurality of types of gas appliances and combinations of the partial flow rate patterns corresponding thereto are associated with each other, and a predetermined flow rate reduction detected during operation of a plurality of gas appliances. A partial flow rate pattern that matches a gas flow rate pattern with a change is extracted from the flow rate pattern table, and an operating gas appliance or an inactive gas appliance that matches the extracted partial flow rate pattern is extracted from the appliance table. A gas appliance determination device comprising: an appliance determination means for extracting. 17. The gas appliance determination device according to claim 16, wherein the plurality of control steps include at least ignition, a stable period thereafter, and flow rate control during the stable period. 18. The gas appliance determination apparatus according to claim 16, wherein the flow rate decrease change is a change that decreases by a predetermined ratio or more with respect to an average flow rate for a certain period of time before the change. 19. The apparatus according to claim 17, wherein the device determining means increases the flow rate within a predetermined time range from the flow rate decrease change, and the increase amount is a predetermined ratio or more with respect to the flow rate decrease change decrease amount. In this case, the gas appliance determination device is characterized by determining the partial flow rate pattern during the flow rate control. 20. The apparatus according to claim 17, wherein the appliance determination means extracts a partial flow rate pattern during the flow rate control as a partial flow rate pattern that matches the detected gas flow rate pattern, and corresponds to the partial flow rate pattern. A gas appliance determination device, characterized in that it is determined that an operating gas appliance has caused the flow rate decrease change. 21. The instrument determination means according to claim 17, wherein the flow rate change amount of the detected gas flow rate pattern is a difference value of a plurality of gas flow rates corresponding to the partial flow rate pattern in the stable period. When detected,
A gas appliance determination device, characterized in that it is determined that an operating gas appliance corresponding to the partial flow rate pattern has caused the flow rate decrease change. 22. The gas according to claim 17, when the appliance determination means detects that the flow rate change amount of the detected gas flow rate pattern is a gas flow rate corresponding to the partial flow rate pattern in the stable period. A gas appliance determination device characterized by determining that the operation of the appliance has been stopped. 23. The gas appliance according to claim 17, wherein the partial flow rate pattern in the stable period has a partial flow rate pattern corresponding to proportional control, and the gas appliance having a partial flow rate pattern corresponding to non-proportional control that is not the proportional control. During operation, when a gas flow rate pattern accompanied by the flow rate decrease change is detected, the appliance determination means, the gas flow rate pattern detected after the flow rate decrease change is a gas flow rate pattern corresponding to the non-proportional control. When it is detected that the gas appliance has a partial flow rate pattern corresponding to the proportional control, it is determined that the operation of the gas appliance is stopped. 24. The gas flow rate pattern according to claim 17, wherein the partial flow rate pattern in the stable period is a gas flow rate pattern corresponding to proportional control, and the gas flow rate pattern accompanied by the flow rate decrease is detected during operation. In this case, the appliance determination means does not extract the partial flow rate pattern during the flow rate control as the partial flow rate pattern that matches the detected gas flow rate pattern, and the gas flow rate pattern detected after the decrease in the flow rate is A gas appliance determination device, which determines that one of the plurality of gas appliances has been deactivated when a gas flow rate pattern corresponding to the proportional control is detected. 25. The instrument judging means according to claim 23 or 24, which is a gas flow rate detected at a predetermined sampling timing, and is a maximum value or a minimum value of the gas flow rate detected in a predetermined constant period. When the difference is equal to or larger than a first reference value and the difference between continuously detected gas flow rates is equal to or smaller than a second reference value, the gas flow rate pattern for proportional control in the stable period is determined. Instrument determination device. 26. The appliance determination means according to claim 16, wherein among the plurality of operating gas appliances in the appliance table, the detected flow rate change amount of the gas flow rate pattern is the plurality of operating gas appliances. From gas appliances smaller than the maximum gas flow rate of each gas appliance,
A gas appliance determination device characterized by extracting a gas appliance in operation that has undergone the decrease in flow rate or a gas appliance that has stopped operating. 27. The gas appliance according to claim 16, wherein the appliance determining unit extracts a gas appliance having a minimum gas flow rate larger than the gas flow rate after the flow rate decrease change from the plurality of operating gas appliances in the appliance table. ,
A gas appliance determination device characterized by determining that the operation of the gas appliance has been stopped. 28. In a gas appliance determination device for determining a gas appliance connected to a gas supply line, a partial flow rate pattern obtained by dividing a series of gas flow rate patterns generated with combustion control for a plurality of types of gas appliances, Corresponds to a flow rate pattern table classified at every control step having at least ignition time, a stable period after that, and a flow rate control time in the stable period, and a combination of a plurality of types of gas appliances and the partial flow rate patterns corresponding thereto. When it is detected that the attached instrument table and the gas flow rate pattern with a predetermined flow rate decrease detected during operation of multiple gas appliances match the partial flow rate pattern during the flow rate control, it corresponds to the partial flow rate pattern. And an instrument determining means for determining that the operating gas instrument has caused the flow rate decrease change. Gas appliance determination unit. 29. In a gas appliance determination device for determining a gas appliance connected to a gas supply line, a partial flow rate pattern obtained by dividing a series of gas flow rate patterns generated with combustion control for a plurality of types of gas appliances, Corresponds to a flow rate pattern table classified at every control step having at least ignition time, a stable period after that, and a flow rate control time in the stable period, and a combination of a plurality of types of gas appliances and the partial flow rate patterns corresponding thereto. The amount of change in the flow rate of the attached gas table and the flow rate pattern of the gas flow pattern, which is detected during the operation of multiple gas appliances, is the difference value between the multiple gas flow rates corresponding to the partial flow rate pattern in the stable period. When it is detected that the gas appliance in operation corresponding to the partial flow pattern has caused the flow rate decrease change. Gas appliance determination apparatus characterized by comprising determination means. 30. In a gas appliance determination device for determining a gas appliance connected to a gas supply line, a partial flow rate pattern obtained by dividing a series of gas flow rate patterns generated by combustion control for a plurality of types of gas appliances, Corresponds to a flow rate pattern table classified at every control step having at least ignition time, a stable period after that, and a flow rate control time in the stable period, and a combination of a plurality of types of gas appliances and the partial flow rate patterns corresponding thereto. When it is detected that the flow rate change amount of the gas flow rate pattern accompanied by a predetermined flow rate decrease change detected during operation of the attached appliance table and a plurality of gas appliances is the gas flow rate corresponding to the partial flow rate pattern in the stable period. And a gas appliance determination device that determines that the operation of the gas appliance has been stopped. 31. In a gas appliance determination device for determining a gas appliance connected to a gas supply line, a partial flow rate pattern obtained by dividing a series of gas flow rate patterns generated with combustion control for a plurality of types of gas appliances, Corresponds to a flow rate pattern table classified at every control step having at least ignition time, a stable period after that, and a flow rate control time in the stable period, and a combination of a plurality of types of gas appliances and the partial flow rate patterns corresponding thereto. The attached appliance table, the gas appliance having a partial flow rate pattern in which the partial flow rate pattern in the stable period corresponds to proportional control, and the gas appliance having a partial flow rate pattern corresponding to non-proportional control that is not the proportional control are in operation. When a gas flow rate pattern accompanied by a predetermined flow rate decrease change is detected, the appliance determining means determines the flow rate decrease change. When the gas flow rate pattern detected later detects that it is a gas flow rate pattern corresponding to the non-proportional control, an appliance determination means for determining that the gas appliance having the partial flow rate pattern corresponding to the proportional control is stopped. A gas appliance determination device, comprising: 32. In a gas appliance determination device for determining a gas appliance connected to a gas supply line, a partial flow rate pattern obtained by dividing a series of gas flow rate patterns generated with combustion control for a plurality of types of gas appliances, Corresponds to a flow rate pattern table classified at every control step having at least ignition time, a stable period after that, and a flow rate control time in the stable period, and a combination of a plurality of types of gas appliances and the partial flow rate patterns corresponding thereto. When a gas flow pattern accompanied by the flow rate decrease is detected during operation of a plurality of gas appliances in which the attached appliance table and the partial flow rate pattern in the stable period are gas flow rate patterns corresponding to proportional control, the appliance The determination means determines the flow rate control as a partial flow rate pattern that matches the detected gas flow rate pattern. When the gas flow rate pattern detected after the change in the flow rate is not the gas flow rate pattern corresponding to the proportional control without extracting the partial flow rate pattern at the time, one of the plurality of gas appliances is detected. A gas appliance determination device, which determines that one of the gas appliances has been stopped. 33. The gas appliance according to any one of claims 1 to 32, further, when the gas flow rate is detected over a predetermined time limit for the gas appliance determined by the appliance determining means,
A gas appliance determination device comprising operation monitoring means for performing a safety operation including gas shutoff or alarm output. 34. The gas appliance determination device according to claim 33, wherein the time limit is set for each gas appliance. 35. The gas appliance determination device according to claim 33, wherein the operation monitoring means continues to monitor the time limit even if the detected gas flow rate fluctuates. 36. The gas flow rate detecting means installed in the gas supply line according to any one of claims 1 to 35, wherein the appliance determining means determines the gas flow rate value from the gas flow rate detecting means. A gas appliance determination device characterized by being supplied. 37. The gas appliance determination device according to any one of claims 1 to 36, a gas flow rate detection means installed in the gas supply line, and a gas flow rate detected by the gas flow rate detection means are integrated. And a gas flow rate integrating means for controlling the gas flow rate.