JP2019045222A - Gas appliance discrimination device - Google Patents

Abstract

To provide a gas appliance discrimination device capable of preventing erroneous determination in gas appliance discrimination.SOLUTION: The gas appliance discrimination device comprises: flow rate measurement means 104 configured to measure the gas flow rate flowing channels at constant time intervals and to output the same as a piece of flow rate data; appliance discrimination means 106 configured to discriminate a gas appliance from the flow rate data measured by the flow rate measurement means 104; and season estimation means 107 for estimating the season. The appliance discrimination means 106 limits the appliance to be discriminated for each season estimated by the season estimation means 107.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technology for determining a gas appliance whose use has been started by detecting a change in gas flow rate.

  There has been proposed a gas meter device that identifies what gas appliance has been used based on a change in flow rate of gas flowing in the pipe. For example, Patent Document 1 below measures the gas flow rate at fixed time intervals, and compares the obtained change in flow rate value pattern with the change rate pattern obtained in advance for each gas appliance. Discloses a gas meter device for determining a gas appliance whose use has been started.

  Patent Document 1 proposes to improve the accuracy of discrimination by utilizing the flow rate indicating the feature of the gas appliance for discrimination of the gas appliance, and an intermediate stable flow rate as one of the flow rates indicating the feature of the gas appliance Is illustrated. The intermediate stable flow rate is the rate of increase of the flow rate that appears between the rise of the flow rate immediately after the start of use of the gas appliance and the flow rate becoming stable at an almost constant value in the pattern of change in flow rate acquired at fixed time intervals. It indicates the flow rate corresponding to a relatively small area. In other words, the intermediate stable flow rate is the flow rate corresponding to the flat portion appearing in the middle of the increase in the flow rate in the flow change pattern. Gas appliances that perform a slow ignition operation, such as a gas fan heater, for example, typically exhibit such a flow rate change pattern. Slow ignition is ignition operation in a state where gas pressure is suppressed to prevent explosive ignition.

JP, 2011-095200, A

  However, some gas fan heaters can not be accurately determined because they do not show clear slow ignition, and gas appliances such as gas stoves and dryers also exist in the gas flow rate range of the gas fan heater. doing. Therefore, there is a problem that the gas appliance that has started operation is determined to be the gas stove despite the gas fan heater.

  Further, although there is a drier in the gas appliance, some of these driers have a flow rate pattern substantially the same as that of the gas fan heater, and there is also a problem that the distinction is difficult.

  An object of the present invention is to provide a gas appliance discriminating apparatus capable of improving the accuracy of the appliance discrimination by incorporating the use status according to the season into the logic of appliance judgment even if there are gas appliances having similar flow variation patterns. Do.

  In order to solve the above-mentioned conventional problems, the gas appliance discriminating apparatus according to the present invention measures the flow rate of gas flowing in the flow path at constant time intervals and outputs it as flow rate data, and The apparatus comprises: an appliance discriminating means for discriminating the gas appliance from flow rate data from the start of operation of the gas appliance; and a seasoning assumption means for assuming a season, wherein the appliance discriminating means is for each season assumed by the seasoning means. , The instrument to discriminate is characterized by the above.

This makes it possible to distinguish gas appliances (for example, gas fan heaters, gas stoves, dryers, etc.) that have similar flow areas or flow patterns and may not be clearly distinguishable, taking into account the seasonal use conditions It is possible to improve the discrimination accuracy of the gas appliance.

  According to the gas appliance discriminating apparatus of the present invention, it is possible to improve the discrimination accuracy of the gas appliance.

Block diagram showing the configuration of the gas meter in the first embodiment The figure which shows the use period of the gas appliance in the embodiment. Flow chart showing appliance discrimination processing in the embodiment Graph showing change in flow rate at start of start of fan heater and stove in the same embodiment Flow chart showing the appliance discrimination process in the second embodiment Flowchart showing the appliance discrimination process in the third embodiment Graph showing step-like flow rate change of fan heater in the same embodiment Flowchart showing the appliance discrimination process in the fourth embodiment

  According to a first aspect of the present invention, there is provided a flow rate measuring means for measuring a gas flow rate flowing in a flow path at fixed time intervals and outputting it as flow rate data, and an appliance discriminating means for discriminating a gas appliance from flow rate data measured by the flow rate measuring means Seasoning means for assuming the season, wherein the appliance judging means is characterized by limiting the appliance to be judged for each season assumed by the seasoning means, and thus similar Discrimination of gas appliances (for example, gas fan heaters, gas stoves, dryers, etc.) which have a flow area or a flow pattern and may not be clearly distinguishable can be judged in consideration of the use situation in the season, It is possible to improve the determination accuracy of the gas appliance.

  According to a second aspect of the present invention, in the first aspect in particular, the device determining means determines, from the flow rate data, either the first gas device used in a specific season or the second gas device used regardless of the season. If it is not possible, the season assumed by the season assumption means is not distinguished from the first gas appliance when the first gas appliance is not used.

  According to a third invention, in particular according to the first invention, the device judging means is a second gas device used regardless of the first gas device used in a specific season from the flow rate data from the start of operation. When any of the above can not be determined, it is characterized in that when the season assumed by the season assumption means is a season when the first gas appliance is not used, it is determined as the second gas appliance.

  According to a fourth aspect of the present invention, in the first aspect, the appliance discriminating means is measured by the flow rate measuring means when the season assumed by the season assuming means corresponds to a season when the first gas appliance is not used. If the detected gas flow rate can not detect that the flow rate zone is within the predetermined range, all the gas appliances within the flow range within the predetermined range can be detected in the season where the first gas appliance is used. It discriminate | determines as said 1st gas instrument, It is characterized by the above-mentioned.

According to a fifth invention, in the first invention in particular, the flow rate change detection which monitors the presence or absence of a predetermined flow rate change pattern of the first gas device when the device determining means determines the first gas device. Means for detecting the presence of the predetermined flow rate change pattern by the flow rate change detecting means, and the season assumed by the season assuming means does not use the first gas appliance. In the above, the used gas appliance is determined as the third gas appliance to be used regardless of the season.

  According to a sixth aspect of the present invention, in the first aspect, the gas flow rate measured by the flow rate measuring means is integrated when the gas determining means determines that the gas tool is a specific gas tool. An instrument flow rate integrating means is provided.

  In a seventh aspect of the invention based on the sixth aspect of the invention, in particular, when the appliance flow rate integrating means can not discriminate between the first gas appliance and the second gas appliance, the season assumed by the season assumption means is the above The gas flow rate that can not be determined when corresponding to the season when the first gas appliance is not used is integrated as an integrated amount A, and when the season assumed by the season assuming means corresponds to the season when the first gas appliance is used The gas flow rate is integrated as an integrated amount B, and the integrated amount of the first gas tool is determined as an integrated amount B-integrated amount A.

  According to an eighth invention, in any one of the first to seventh inventions, the seasonal assumption means comprises a calendar, and seasonality is assumed based on the calendar month and day.

  According to a ninth invention, in particular, in any one of the first to seventh inventions, the seasonal assumption means comprises a temperature detection means, and assumes a season based on a transition of an annual temperature. is there.

  According to a tenth invention, in particular, according to any one of the first to seventh inventions, the season assumption means includes a gas usage change detection means, and assumes seasons according to the usage amount of gas. It is a thing.

  Hereinafter, an embodiment of a gas appliance discriminating apparatus according to the present invention will be described with reference to the attached drawings. In the embodiment described below, a gas meter is mentioned as an example of a gas appliance discriminating device, and the process is explained. In the drawings, the same components are denoted by the same reference numerals, and the description of the components already described is omitted. The present invention is not limited by the embodiments described below.

Embodiment 1
FIG. 1 shows a configuration example of a gas meter 100 according to a first embodiment of the present invention. The gas meter 100 has a flow passage 102 therein and is used in a state of being connected to a gas pipe 10a for supplying a gas. The gas meter 100 is disposed between the gas pipe 10a and one or more gas appliances (gas stove, gas fan heater, dryer, etc.). FIG. 1 shows a state in which one end of the flow path 102 of the gas meter 100 is connected to the upstream gas pipe 10 a and the other end of the flow path 102 is connected to the downstream gas pipe 10 b. The first gas appliance 13, the second gas appliance 14 and the third gas appliance 15 are connected to the pipe 10b. Hereinafter, the gas appliances 13 to 15 will be described unless distinction is particularly required. Moreover, a gas fan heater is abbreviated as a fan heater, and a gas stove is abbreviated as a stove.

  In the configuration illustrated in FIG. 1, the gas meter 100 generally includes a flow rate measuring unit 104, a control unit 105, and a blocking unit 109 disposed in the middle of the flow path. The flow rate measuring means 104 measures the flow rate of the gas flowing through the flow path 102 at constant time intervals. As the flow rate measuring means 104, for example, an ultrasonic flowmeter can be applied.

The ultrasonic flowmeter emits ultrasonic waves at constant time intervals to the gas flowing in the flow passage 102, and measures the instantaneous flow rate of gas by determining the propagation time difference caused by the gas flow. By acquiring data indicating the flow rate at constant time intervals (for example, every 0.5 seconds) detected by the flow rate measurement unit 104, it is possible to detect fluctuations in the amount of gas used.

  Further, in the configuration illustrated in FIG. 1, the control unit 105 includes an appliance determination unit 106, a season estimation unit 107, and a calendar 108. Details of the operation of the gas meter 100 will be described later.

  In this example, the gas meter 100 has a blocking means 109 disposed between the gas pipe 10 a and the flow rate measuring means 104. The shutoff means 109 stops the supply of gas to the gas appliances 13, 14 and 15 connected to the gas pipe 10b based on the control of the control means 105 when an abnormal increase in the gas flow rate is detected or the like. As the shutoff means 109, for example, a shutoff valve can be used.

  The appliance discriminating means 106 discriminates the gas appliance started to be used based on the flow rate change pattern obtained at the start of operation of the gas appliances 13-15 based on the flow rate value acquired by the flow rate measuring means 104. At that time, the determination accuracy is improved by limiting the gas appliances to be determined based on the season assumed by the season assuming means 107 described later.

  The season estimating unit 107 estimates the current season (spring, summer, autumn, and winter) based on the month and day managed by the calendar 108. The season assumed here is the season in which a specific gas appliance is used or is not used, and it is more realistic in consideration of not only the date but also the geographical position. Season can be assumed.

  The instrument flow rate integrating means 110 integrates the flow rate measured by the flow rate measuring means 104 for each specific gas instrument or for all gas instruments among the gas instruments determined by the instrument determination means 106.

  Hereinafter, the operation of the appliance determination unit 106 will be described.

  FIG. 2 shows the annual use of gas appliances. Heating appliances such as fan heaters are used from the middle of autumn to early spring, and stoves and dryers are used year-round.

  FIG. 3 shows an appliance discriminating means in the case where it is not possible to discriminate from the flow rate data either the first gas appliance 13 used in a specific season and the second gas appliance 14 or the third gas appliance 15 used regardless of the season. The flowchart of the process in 106 is shown, and as a specific gas appliance, the case where the first gas appliance 13 is a fan heater, the second gas appliance 14 is a stove, and the third gas appliance 15 is a dryer will be described.

  FIG. 4 shows a flow pattern after the fan heater and the stove start operation. The feature of the flow pattern of the fan heater is a flow pattern called slow ignition in which the flow becomes constant on the way to the maximum flow. The discrimination means 106 can discriminate the fan heater and the stove by performing the appliance discrimination based on the presence or absence of the slow ignition and the maximum flow rate. On the other hand, the flow rate pattern of the dryer is equal to that of the fan heater and can not be discriminated.

  First, the appliance discriminating means 106 extracts the flow rate pattern obtained by acquiring (S101) the flow rate data measured by the flow rate measuring means 104 (S102), and performs the discrimination process of the gas appliance (S103). The processes S101 to S103 are normal appliance discrimination processes based on the flow rate change pattern at the start of operation (hereinafter, the appliance discrimination process by the processes S101 to S103 is referred to as an appliance discrimination process A.

  If it is determined in step 103 that the stove is a stove, the appliance determination is ended (Yes in step S104). If it is not a stove, that is, if it is a fan heater or a dryer (No in processing S104), the appliance discriminating means 106 determines whether the season assumed by the season assumption means 107 is summer, ie, a season when the fan heater is not used Whether or not it is summer (S105), if it is summer, it does not determine as a fan heater, but performs appliance determination as a dryer (S106). When it is not summer, it discriminate | determines from a fan heater or a dryer (S107), and complete | finish apparatus discrimination | determination.

  As described above, according to the present embodiment, the appliance discriminating means 106 prevents the erroneous determination to be discriminated as the fan heater which is not used in summer in summer by taking the season into consideration when performing the appliance discrimination. can do.

  The appliance flow rate integrating means 110 can integrate the amount of gas used for each appliance based on the appliance determination result of the appliance determining means 106.

  Furthermore, by integrating the flow rate of the gas used for the fan heater, the gas seller can avoid the erroneous charge measure due to the erroneous determination even when the charge measure such as discounting for the gas use amount of the fan heater is performed.

Second Embodiment
Next, the operation of the appliance determination means 106 in the second embodiment will be described using the flowchart of FIG. In the present embodiment, the gas appliances to be used are two gas appliances (the first gas appliance 13 and the second gas appliance 14) having the same predetermined flow rate as the gas flow rate, and the predetermined gas flow rates are the same. A fan heater used in winter and a stove used year-round are assumed as two gas appliances in the flow range.

  First, as processing in the summer, it is determined whether the season assumed by the season assuming unit 107 is summer (S201), and in the case of summer, it is determined whether the flow in a predetermined flow range flows (S202). If the flow rate within the specified flow rate range flows, the fan heater will not be used in summer, so it is determined that the stove has been used, and the stove-less flag is reset assuming that the stove is present ( S203) If it is not possible to detect that the flow rate in the predetermined flow rate range has flowed, it is determined that no stove is present, and a stove no flag is set (S204). If it is not summer, the above-described instrument discrimination process A is performed (S210).

  That is, in summer processing, when the gas flow rate in the predetermined flow rate range is not detected, it is determined that the stove used all year round does not exist downstream of the meter. In order to reliably determine that the stove does not exist downstream of the meter, it is preferable to perform the process at summer when the gas flow rate in a predetermined flow rate range is not detected a plurality of times.

  Next, processing in the winter season will be described. First, it is determined whether the present is winter (S205), and if it is not winter, the normal appliance determination processing A is performed. The presence or absence of the stove determined in the summer processing is judged by the stove absence flag (S206), and if the stove absence flag is set, that is, if it is determined that the stove does not exist, the flow rate is within the predetermined range If it is determined that the flow rate range is within the flow rate range, it is determined that there is no stove among the stoves and fan heaters belonging to the flow rate range (S208).

  If the season is not winter or the stove absence flag is not set, that is, if it is determined that the stove is present, the normal appliance discrimination processing A is performed (S211).

As described above, according to the present embodiment, the first gas appliance 13 (in this embodiment, the fan heater) of one of the two gas appliances in the predetermined flow rate range is used depending on the season, and the other When the second gas appliance 14 (in the present embodiment, the stove) is used all year round, it can be determined that the second gas appliance 14 used all year round is not used in the season when the first gas appliance 13 is not used In addition, the determination accuracy of the first gas appliance 13 can be improved by determining that the second gas appliance 14 is not connected downstream of the meter.

  As a result, the characteristic flow rate change pattern such as slow ignition can not be detected, and even when the gas appliance can not be determined only by the ordinary appliance determination processing A, the accuracy of the appliance determination is improved by adding the season. be able to.

Third Embodiment
Next, the operation of the tool discrimination means 106 in the third embodiment will be described using the flowchart of FIG. In the present embodiment, the gas appliances used are the specific gas appliances (first gas appliance 13 and second gas appliance 14) and other gas appliances (third gas appliance) having similar gas flow patterns. 14), the first gas appliance 13 of a particular gas appliance will be described as a fan heater used in winter, the second gas appliance 14 as a dryer used all year round.

  First, based on the flow rate change pattern obtained at the start of operation by the appliance discrimination means 106, the used gas appliance is discriminated (normal appliance discrimination processing A: S301), and the result of the appliance discrimination is a specific gas appliance ( In order to determine whether it is a fan heater or a dryer (S302) and to identify the specific gas device if it is a specific gas device, the specific gas device, that is, the fan heater It is continuously monitored whether or not a specific flow pattern specific to the dryer appears (S303).

  The specific flow rate change pattern is a flow rate change pattern when temperature control is performed for a while after the start of operation, and a typical flow rate change pattern of a fan heater or a dryer has a step shape as shown in FIG. Flow rate change. This is because, in the combustion control of the fan heater or the dryer, the relationship between the amount of combustion and the amount of air flow is performed at several control points set in advance in order to perform complete combustion.

  Then, if a specific flow change pattern can be detected, it is determined whether the current season is summer, that is, it is a season when the fan heater is not used (S304), and if it is summer, the flow change similar to the fan heater It is determined that the dryer shows a pattern (S305).

  If a specific flow rate change pattern can not be detected within the predetermined period in process S303, the appliance determination is ended as it is. If the season is not summer in the processing S304, the appliance determination as the fan heater or the dryer is ended.

  As described above, according to the present embodiment, the first gas device 13 (in this embodiment, the fan) is used in which one of the two gas devices, which is a specific gas device having the same flow rate pattern, is used depending on the season. If the first gas appliance 13 is not in the season in which it is used, it is used year-round if it is a heater) and the other is the second gas appliance 14 (in the embodiment a dryer) used yearly By determining that the second gas appliance 14 is used, it can be reliably determined that the second gas appliance 14 is used, and the overall determination accuracy can be improved.

  Moreover, in the first embodiment, it was assumed that the determination of the stove was performed reliably, but in the present embodiment, even when the stove is misidentified as the fan heater or the dryer in the appliance determination processing A, By continuously monitoring the flow rate change and detecting the presence or absence of the flow pattern unique to the fan heater or the dryer, it is possible to prevent an erroneous determination.

In addition, when it discriminate | determines from a fan heater or a dryer, how to use peculiar to an instrument is monitored, and a fan heater and a dryer are discriminate | determined. For example, if a fan heater is used for a relatively long time or step-like flow rate change is repeated to perform temperature control, etc., it can be determined not a dryer but a fan heater.

Embodiment 4
Next, the operation of the instrument flow rate integrating means 110 in the fourth embodiment will be described using the flowchart of FIG. In the present embodiment, a fan heater used in winter as the first gas appliance 13 and a dryer or stove used yearly as the second gas appliance 14 are assumed, and the fan heater is the first gas appliance 13 The procedure for determining the integrated amount which is the amount of used gas will be described.

  Furthermore, three gas appliances with fan heaters and dryers that are difficult to distinguish with similar flow patterns or two gas appliances and stoves with the same flow zone and possibly indistinguishable are appliance discrimination means. The case where it can not distinguish clearly is assumed.

(Summer processing)
First, the appliance is discriminated by the ordinary appliance discrimination processing A (S401), and as a result of the appliance discrimination, when the gas appliance can not distinguish either the first gas appliance 13 or the second gas appliance 14 (Yes in process S402) That is, when the discrimination of the two gas appliances is not clear, and the current season is summer without using the first gas appliance 13 (fan heater) (Yes in process S403), the integrated value is set to the first gas appliance 13 ( The accumulated amount A of the second gas appliance 14 (drier or stove) which is not the fan heater is stored (S404).

(Processing in winter)
Next, if it is determined in the process 403 that the season is not summer, it is determined whether the season is winter (S405). If it is winter, the first gas appliance 13 (fan heater) is used in winter As a process, the integrated value is stored as an integrated amount B which is the integrated amount of the sum of the first gas appliance 13 (fan heater) and the second gas appliance 14 (drier or stove) (S406), and the first gas appliance 13 ( The integrated amount of the fan heater is calculated as integrated amount B-integrated amount A (S407).

  That is, when determining the integrated amount of the first gas appliance 13 (fan heater) used in a specific season, the accumulated amount A of seasons in which the first gas appliance 13 (fan heater) is not used is stored. The integrated amount A is subtracted from the integrated amount B when the determination of the device can not be clearly made, whereby the integrated amount of the first gas device can be estimated.

  In the above example, it is assumed that the gas usage of the second gas appliance 14 used regardless of the season is substantially constant throughout the year, but actually the difference between the temperatures of summer and winter is the difference between the temperatures of the gas The amount of use itself fluctuates. That is, since the usage amount in winter also increases even with the same gas appliance, when obtaining the integration amount of the first gas appliance 13 (fan heater), it is assumed in winter as integration amount B-integration amount A x K The estimation accuracy of the integration amount can be further improved by considering the correction coefficient K (one or more) of the increase amount.

  Further, in the present embodiment, the usage amounts of summer and winter gas are simplified as integrated amounts A and B, respectively, but in actuality, based on the usage amount of a predetermined period (for example, one month), the predetermined period You may calculate the usage amount for each. In this case, the integrated amount A 'of the predetermined period of summer is obtained from the average used amount as the amount of use corresponding to the integrated amount A of summer, and the integrated amount B' of the predetermined period of winter is determined. The integrated amount of a predetermined period of 13 (fan heater) can be obtained as integrated amount B′−integrated amount A ′.

In the above embodiment, the season assumption means 107 has been described as assuming seasons using the calendar 108, but as another method, the temperature detection means 111 is provided instead of the calendar 108, and a temperature sensor or the like is used. It is also possible to estimate the season by detecting changes in temperature or gas temperature. In addition, a gas use amount change detection unit 112 that calculates the change amount of the gas use amount for a predetermined period is provided, and the season can be determined using the change of the gas use amount or the number of times of replacement of the LP gas cylinder as an index. In addition, a use time change detection means (not shown) for calculating a change time of the continuous use time can be provided, and the season can be determined by using the transition of the continuous use time as an index. Furthermore, it is possible to assume the actual season more by adding the position information by the GPS or the like together with the season assumption means 107.

  According to the embodiment of the present invention, even when a plurality of gas appliances are used, the discrimination accuracy of the appliance discrimination can be improved, and therefore, the present invention is useful for a gas meter having a gas appliance discrimination function.

13 Gas appliances (1st gas appliance)
14 Gas appliances (second gas appliances)
15 gas appliances (third gas appliances)
100 gas meter (gas appliance identification device)
104 flow rate measuring means 106 appliance judging means 107 seasoning means 108 calendar 110 appliance flow integrating means 111 temperature detecting means 112 gas usage change detecting means

Claims (10)

Flow rate measuring means for measuring the gas flow rate flowing in the flow path at fixed time intervals and outputting it as flow rate data;
An appliance discriminating means for discriminating a gas appliance from flow rate data measured by the flow rate measuring means;
And a seasoning means for assuming the season,
The said apparatus discrimination means limits the apparatus to discriminate | determine for every season assumed by the said seasonal assumption means, The gas appliance discrimination | determination apparatus characterized by the above-mentioned. The device determining means is
If it is not possible to determine from the flow rate data either the first gas appliance used in a particular season or the second gas appliance used regardless of the season:
The gas appliance discriminating apparatus according to claim 1, wherein when the season assumed by the season assumption means is a season when the first gas appliance is not used, it is not distinguished from the first gas appliance. The device determining means is
When it is not possible to distinguish either the first gas appliance used in a specific season or the second gas appliance used regardless of the season from flow rate data from the start of operation:
The gas appliance discriminating apparatus according to claim 1, wherein when the season assumed by the season assumption means is a season when the first gas appliance is not used, it is discriminated as the second gas appliance. The device determining means is
When the gas flow rate measured by the flow rate measuring means can not detect that the flow rate is within a predetermined range when the season assumed by the season assuming means corresponds to a season when the first gas appliance is not used.
The gas according to claim 1, wherein all the gas appliances in the flow range within the predetermined range are determined as the first gas appliance when the season assumed by the season assumption means uses the first gas appliance. Apparatus discrimination device. It has flow rate change detection means for monitoring the presence or absence of a predetermined flow rate change pattern possessed by the first gas tool when the tool judging means determines that the first gas tool is used,
The device determining means is
The flow rate change detecting means detects the presence of the predetermined flow rate change pattern, and
When the season assumed by the season assumption means corresponds to a season not using the first gas appliance, the gas appliance used is distinguished from the third gas appliance to be used regardless of the season. The gas appliance discrimination device according to claim 1. The apparatus according to any one of claims 1 to 5, further comprising an instrument flow rate integrating means for integrating the gas flow rate measured by the flow rate measuring means when the gas appliance is determined as the specific gas instrument by the instrument judging means. The gas appliance discrimination device according to any one of the preceding claims. The instrument flow rate integrating means is
If it is not possible to distinguish between the first gas appliance and the second gas appliance:
The gas flow rate which can not be determined when the season assumed by the season assumption means corresponds to the season when the first gas appliance is not used is integrated as an integrated amount A,
Integrating the gas flow rate which can not be determined when the season assumed by the season assumption means corresponds to the season in which the first gas appliance is used, as an integrated amount B;
The gas appliance discriminating apparatus according to claim 6, wherein the integrated quantity of the first gas appliance is determined as an integrated quantity B-an integrated quantity A. The gas appliance discriminating apparatus according to any one of claims 1 to 7, wherein the season assumption means comprises a calendar and assumes a season based on a month and day of the calendar. The gas appliance discriminating apparatus according to any one of claims 1 to 7, wherein the season assumed means comprises a temperature detection means, and assumes a season based on a transition of an annual temperature. The gas appliance discriminating apparatus according to any one of claims 1 to 7, wherein the season assumed means comprises a gas usage change detection means, and seasons are assumed according to the usage of gas.