JP4670360B2 - Gas appliance, appliance discrimination device and gas meter - Google Patents

Description

  The present invention relates to a technical field in which an instrument-specific signal is generated from a gas instrument so that the gas meter detects the signal and discriminates the gas instrument to be used.

  Conventionally, what changes a gas inflow amount is proposed as what distinguishes a type with other gas appliances (for example, refer to patent documents 1). The configuration will be described below with reference to FIG.

  In FIG. 10, 1 is a gas meter and 2 is a gas appliance. 3 is a combustion part of the gas appliance 2, 4 is a flow control valve, and 5 is a control part of the flow control valve 4. Reference numeral 6 denotes a flow rate measuring means provided in the gas meter 1.

In such a configuration, when the gas appliance 2 starts operating, the gas meter 1 detects the flow rate of the gas appliance 2 by the flow rate measuring means 6. Now, if the flow control valve 4 is controlled by the control unit 5 of the gas appliance 2 to change the amount of inflow into the gas appliance 2 and this inflow is made a specific pattern in the gas appliance 2, the flow rate of the gas meter 1 will be described. The measuring device 6 can identify this gas appliance.
JP-A-3-236515

  However, in the conventional configuration, if the flow rate measuring means 6 in the gas meter 1 is configured as a membrane type, it takes time to measure the flow rate. Therefore, the inflow amount pattern signal generated on the gas appliance 2 side is also correspondingly compared. A long time was required. Since the inflow amount pattern signal is unnecessary for the operation for the gas appliance 2 to perform its original function, it is desirable that the inflow amount pattern signal does not affect the original operation of the gas appliance 2 as much as possible. However, when a signal having a relatively long time is required as described above, the gas appliance 2 is affected, an unnecessary operation of the gas appliance 2 occurs, and safety is not necessarily guaranteed. It was.

  An object of the present invention is to solve the above-described conventional problems, and to make it possible to perform an appliance discrimination operation in a state where the influence on the original operation of a gas appliance is extremely reduced.

  The appliance discriminating system of the present invention generates a signal specific to a gas appliance by a signal generator provided in the gas appliance, and detects the signal by an instantaneous signal detector provided in the gas meter to identify the gas appliance. It is.

  An appliance discrimination system according to the present invention includes a gas appliance and a gas meter connected to the gas appliance. The gas meter includes a signal generated by a signal generator provided in the gas appliance and generating a signal specific to the appliance. This is a method of identifying the gas appliance by the instantaneous signal detection unit of the signal provided in the apparatus, and has an effect that the appliance discrimination operation can be performed in a state where the influence on the original operation of the gas appliance is extremely reduced.

  The first invention is a gas appliance whose flow rate is controlled so as to generate flow rate value information distinguishable from other connected gas appliances, wherein the flow value information places importance on the magnitude of the gas flow rate. In addition, since the gas appliance can be identified in a short time by forming it with the magnitude of the gas flow rate, the appliance can be identified in a state where the influence on the original operation of the appliance is extremely small. The flow rate measurement signal measured by the gas meter can be used as it is.

  A second aspect of the invention is a gas appliance whose flow rate is controlled so as to generate flow rate value information that can be distinguished from other connected gas appliances, and the flow rate value information emphasizes the duration of a predetermined gas flow rate value. By placing it, the gas appliance can be identified in a short time, so that the appliance can be identified in a state where the influence on the original operation of the appliance is extremely small, and compared with the case where detection is performed by the flow rate. More reliable detection can be performed.

  A third aspect of the invention is a gas appliance whose flow rate is controlled so as to generate flow rate value information that can be distinguished from other connected gas appliances, wherein the flow rate value information places importance on the gas flow rate change pattern. Therefore, the gas appliance can be identified in a short time, so that the appliance can be identified in a state where the influence on the original operation of the appliance is extremely small, and it is effective for preventing mischief by artificial signal generation. .

  A fourth invention is the gas appliance according to any one of the first to third inventions, wherein the flow rate information is generated at the start of use of the gas appliance, thereby reliably identifying the gas appliance that has started use. Can be done.

  A fifth invention is the gas appliance according to any one of the first to third inventions, wherein the flow rate information is generated during use of the gas appliance, so that the rise of the gas appliance is unstable. Compared with the method of giving a signal at the time, the gas appliance can be discriminated in a state in which the performance is less affected.

  A sixth invention is the gas appliance according to any one of the first to third inventions, wherein the flow rate value information is generated before the end of use of the gas appliance, thereby identifying the gas appliance to be ended of use. It can be done reliably.

  7th invention has the signal analysis part which memorize | stored the flow value information registered for every connected gas appliance, and the said signal analysis part is based on the gas flow rate measured by the gas meter, and the said flow rate value information By discriminating the gas appliance being used, the gas appliance can be identified in a short time, so that the appliance discrimination can be performed with a very small influence on the original operation of the appliance.

  The younger brother's 8 invention is the instrument discriminating device of the seventh invention, and the flow rate value signal of the signal analysis unit puts weight on the magnitude of the gas flow rate. It can be used as it is.

  According to the ninth aspect of the present invention, the flow rate information of the signal analyzing unit is further emphasized in the duration of the gas flow rate, compared with the case where the detection is performed at the flow rate. Reliable detection can be performed.

  The tenth invention is effective for preventing mischief by artificial signal generation by adding importance to the gas flow rate change pattern in the flow rate information of the signal analyzer in the instrument discriminating apparatus of the seventh invention. It is.

  In an eleventh aspect of the present invention, the instrument determination device according to the seventh aspect of the invention further identifies the gas appliance that has started to be used because the flow rate value information of the signal analyzer is generated at the start of use of the gas appliance. It can be done reliably.

  According to a twelfth aspect of the present invention, the instrument determination device according to the seventh aspect of the present invention is such that the flow rate value information of the signal analysis unit is generated during use of the gas appliance, so that the rise of the gas appliance is unstable. Compared with the method of giving a signal at the time, the gas appliance can be discriminated in a state in which the performance is less affected.

  A thirteenth aspect of the present invention is the apparatus discriminating apparatus according to the seventh aspect of the present invention, in which the flow rate value information of the signal analyzer is generated before the end of use of the gas apparatus, thereby identifying the gas apparatus to be used. Can be performed reliably.

  In a fourteenth aspect of the present invention, in the gas meter having the appliance discriminating apparatus according to any one of the seventh to thirteenth aspects, the time that affects the original operation of the gas appliance is suppressed to a short time by including means for measuring the instantaneous flow rate. It is possible to reduce the occurrence of unnecessary operation of the gas appliance and improve safety.

  According to a fifteenth aspect, in the gas meter according to the fourteenth aspect, the means for measuring the instantaneous flow rate is an ultrasonic flow rate measuring means, whereby the signal can be accurately supplemented.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a configuration diagram of a gas appliance and an appliance discriminating apparatus according to the first embodiment of the present invention. FIG. 2 is a block diagram of the instantaneous flow rate measuring unit. FIG. 3 is a flowchart of control in the gas appliance. FIG. 4 is a characteristic diagram of the control operation. FIG. 5 is a flowchart of appliance discrimination in the gas meter.

  In FIG. 1, 7 is a gas meter and 8 is a gas appliance. Reference numeral 9 denotes an instantaneous signal detector of the gas meter 7. The instantaneous signal detection unit 9 includes an instantaneous flow rate measurement unit 10 and a signal analysis unit 11. The instantaneous flow rate measuring unit 10 is connected to the gas pipe 12. Reference numeral 13 denotes a combustion part of the gas appliance 8, reference numeral 14 denotes a control valve for the combustion part 13, and reference numeral 15 denotes a control part for the control valve 14. A signal generation unit 16 is formed by the control valve 14 and the control unit 15.

  In FIG. 2, reference numeral 17 denotes a measuring unit connected to the flow path 12 of FIG. Reference numerals 18 and 19 denote ultrasonic transducers, respectively, and reference numeral 20 denotes a processing unit that drives the ultrasonic transducers 18 and 19 and receives signals from them to calculate the flow rate. The signal analysis unit 11 in FIG. 1 is connected to the processing unit 20.

  In FIG. 3, 21 is a start command and 22 is an operation command. 23 is a control valve control command. 24 is a device operation start command, and 25 is a stop command. 26 is a device operation stop command, and 27 is an end command. These flows are performed by the control unit 15.

  In FIG. 5, 28 is a start command and 29 is a flow measurement command. Reference numeral 31 denotes a determination command for an appliance determination signal. Reference numeral 32 denotes an instrument specifying command.

  The operation and action of the gas appliance and appliance discriminating apparatus configured as described above will be described below.

  First, when a switch (not shown) of the gas appliance 8 is turned on, a series of programs is started by a start command 21 according to the flowchart of FIG. When the operation command 22 is sent, the control valve control command 23 is then sent to the control valve 14.

  Assuming that the predetermined flow rate (Qs) is set to give a predetermined time (Ts) as the identification signal of the gas appliance 8, the control valve 14 performs an operation corresponding to the setting.

  Next, based on the equipment operation start command 24, the original operation as the gas appliance 8 is performed. Thereafter, when a stop command 25 is entered, a device operation stop command 26 is executed, and the program is terminated by an end command 27.

  When the series of operations of the gas appliance 8 is performed, the gas meter 1 executes a program based on FIG. That is, the flow measurement command 29 is executed by the start command 28. Thereby, the flow rate measurement is performed in the instantaneous flow rate measurement unit 10 of FIG. That is, ultrasonic flow rate measurement is performed based on the propagation time by the transmission and reception of ultrasonic waves alternately emitted from the pair of ultrasonic transducers 18 and 19 according to the instruction of the processing unit 20 shown in FIG. This result is sent to the signal analysis unit 11, and whether or not the measured flow rate signal is an appliance discrimination signal is determined by the appliance discrimination signal determination instruction 31. As a result, if this is an appliance discrimination signal, the determination follows the YES side, and the appliance is specified by the appliance specifying command 32. If this signal is not an appliance discrimination signal, the determination follows the NO side and executes the flow rate measurement command 29 again.

  FIG. 4 shows this series of operations. That is, when the gas appliance 8 starts operation, in the case of this embodiment, first, a predetermined flow rate (Qs) for specifying the gas appliance 8 flows for a predetermined time (Ts), and then the gas appliance 8 original A flow rate (Qt) flows. Whether or not it is an appliance discrimination signal is determined by whether or not these Qs and Ts match a predetermined value of an appliance registered in advance. In the figure, the dotted line indicates a normal flow rate change when there is no appliance discrimination signal.

  When the flow rate (Qs) is emphasized as the appliance discrimination signal, the duration (Ts) is not adopted as a judgment criterion. In addition, when emphasis is placed on the duration (Ts), whether or not the flow rate (Qs) is constant is adopted as a criterion.

However, since this appliance discrimination signal does not cause the original function of the gas appliance 8,
It is preferable to finish in as short a time as possible. That is, the duration (Ts) is desired to be several seconds or less. In order to identify the flow rate and the duration as described above in such a short time, it is difficult to realize with a membrane type measurement method used in a conventional gas meter, and as shown in this embodiment. Ultrasonic instantaneous flow rate measurement type is suitable. Of course, as long as it is an instantaneous flow rate measurement type, it is needless to say that a thermal flow sensor method, a Karman vortex method, a differential pressure method, or the like may be used.

  Further, as the flow rate value (Qs) to be set, it is necessary to set a value deviating from the flow rate value normally used in the gas appliance 8 in order to reduce the probability of erroneous detection.

  In this embodiment, a single flow rate value or a single duration is used as the instrument discrimination signal, but a plurality of values may be used. It is also possible to make a change pattern combining the above.

  As described above, in the present embodiment, in a system including a gas appliance and a gas meter connected to the gas appliance, a signal generator provided in the gas appliance and generating a signal specific to the appliance, and the gas meter Since the gas appliance can be instantly identified by the instantaneous signal detector of the signal, appliance discrimination can be performed in a state where the influence on the original operation of the appliance is extremely small.

  Further, when the signal is formed with the magnitude of the gas flow rate, the flow rate measurement signal measured by the gas meter can be used as it is.

  In addition, when the signal is formed with the duration of the gas flow rate, more reliable detection can be performed as compared with the case where the detection is performed with the flow rate.

  Further, when the signal is formed as a change pattern by a combination of the magnitude of the flow rate and the duration time, it is effective for preventing mischief by artificial signal generation.

  Furthermore, by giving a signal at the start of use of the gas appliance, it is possible to reliably identify the gas appliance that has started use.

(Embodiment 2)
FIG. 6 is a flowchart of the operation in the second embodiment of the present invention. FIG. 7 is a characteristic diagram of a series of operations at that time.

  The overall configuration of the appliance discrimination system is the same as that shown in FIGS. 1 and 2 shown in the first embodiment, and the program on the gas meter 1 side is the same as that shown in FIG. Also in FIG. 6, most of the flow is the same as in FIG. In the case of this embodiment, after the operation command 22, first, there is a device operation start command 33, and then there is a control valve control command 34.

  The operation and action of the gas appliance and appliance discriminating apparatus configured as described above will be described below.

  First, when a switch (not shown) of the gas appliance 8 is turned on, a series of programs is started by a start command 21 according to the flowchart of FIG. In this case, after the operation command 22 is sent, the device operation start command 33 is sent, and first, the operation as the original gas appliance 8 is performed. Thereafter, a control valve control command 34 is sent to the control valve 14.

  The identification signal of the gas appliance 8 is set to give a predetermined flow rate (Qs) for a predetermined time (Ts), and the signal is detected by the instantaneous flow rate detection unit 10 of the gas meter 1, and the flowchart of FIG. The identification of the gas appliance 8 based on the above is the same as in the first embodiment.

  FIG. 7 shows a series of operations in the second embodiment. That is, in this case, first, the original flow rate (Qt) of the gas appliance 8 flows. Thereafter, a predetermined flow rate (Qs) for specifying the gas appliance 8 flows for a predetermined time (Ts). Whether or not it is an appliance discrimination signal is determined by whether or not these Qs and Ts match a predetermined value of an appliance registered in advance. In the figure, the dotted line shows the normal operation when there is no appliance discrimination signal.

  As described above, in the present embodiment, by giving a signal while the gas appliance is in use, it is less likely to affect the performance as compared with a method of giving a signal when the gas appliance is in an unstable state. Gas appliances can be identified.

(Embodiment 3)
FIG. 8 is a flowchart of the operation in the third embodiment of the present invention. FIG. 9 shows a series of operations at that time.

  The overall configuration of the appliance discrimination system is the same as that shown in FIGS. 1 and 2 shown in the first embodiment, and the program on the gas meter 1 side is the same as that shown in FIG. Also, in FIG. 8, most of the flow is the same as that in FIG. In the case of this embodiment, there is a device operation start command 35 after the operation command 22, and then there is a control valve control command 34 after giving a stop command 36.

  The operation and action of the gas appliance and appliance discriminating apparatus configured as described above will be described below.

  First, when a switch (not shown) of the gas appliance 8 is turned on, a series of programs is started by a start command 21 according to the flowchart of FIG. In this case, after the operation command 22 is sent, the device operation start command 35 is sent, and first, the operation as the original gas appliance 8 is performed. Thereafter, after a stop command 36 is sent, a control valve control command 37 is sent to the control valve 14. Thereafter, a device operation stop command 26 is sent, and a series of operations ends.

  As an identification signal of the gas appliance 8, the predetermined flow rate (Qs) is set to give a predetermined time (Ts), and the signal is detected by the instantaneous flow rate detection unit 10 of the gas meter 1 and shown in the flowchart of FIG. The identification of the gas appliance 8 is based on the same as in the first embodiment.

  FIG. 9 shows a series of operations in the third embodiment. That is, in this case, first, the original flow rate (Qt) of the gas appliance 8 flows. Thereafter, after the stop command 36 is issued, a predetermined flow rate (Qs) for specifying the gas appliance 8 flows for a predetermined time (Ts). Whether or not it is an appliance discrimination signal is determined by whether or not these Qs and Ts match a predetermined value of an appliance registered in advance. In the figure, a dotted line indicates a normal operation when there is no appliance discrimination signal.

  As described above, in the present embodiment, by giving a signal before the end of use of the gas appliance, it is possible to reliably identify the gas appliance that is to end use.

  In the first, second, and third embodiments, the case in which the appliance determination signal is individually given at the start of use, during use, and before the end of use of the gas appliance has been illustrated. .

  In this case, the gas appliance is clearly identified in accordance with the use situation.

  Since the gas appliance and appliance discriminating apparatus according to the present invention can identify appliances from the gas appliance side by issuing appliance-specific signals for appliance discrimination, it can be used for industrial purposes such as factories in addition to household gas meters. The connected gas appliance and gas equipment can be identified based on the same method.

The block diagram of the instrument discrimination | determination system in Embodiment 1 of this invention Configuration diagram of the instantaneous flow rate measurement unit in the appliance discrimination system Flow chart of control in gas appliance of the appliance discrimination system Characteristic chart of control operation in the appliance discrimination system Flow chart of appliance discrimination in the gas meter of the appliance discrimination system Flowchart of control in gas appliance in Embodiment 2 of the present invention Characteristic chart of control operation in the appliance discrimination system Flowchart of control in gas appliance in Embodiment 3 of the present invention Characteristic chart of control operation in the appliance discrimination system Configuration diagram of a conventional instrument discrimination system

Explanation of symbols

7 Gas meter 8 Gas appliance 9 Instantaneous signal detector 16 Signal generator

Claims (4)

In an appliance discrimination system comprising a gas appliance that consumes gas and a gas meter connected to the gas appliance,
The gas appliance includes a control valve that controls the flow rate of the gas, and a control unit that causes the control valve to flow a predetermined flow rate for identifying the device itself for a predetermined time,
The predetermined flow rate for identifying the aircraft is different from the original flow rate of the gas appliance,
The gas meter is configured to measure an instantaneous flow rate flowing through the gas appliance and detect the predetermined flow rate and the predetermined time, and to detect the predetermined flow rate and the predetermined time detected by the instantaneous signal detection unit. And a signal analyzer for identifying the gas appliance. The appliance discriminating system according to claim 1, wherein the controller causes a predetermined flow rate to flow for a predetermined time when the gas appliance starts to be used. The appliance discriminating system according to claim 1, wherein the controller causes a predetermined flow rate to flow for a predetermined time during use of the gas appliance. The appliance discriminating system according to claim 1, wherein the controller causes a predetermined flow rate to flow for a predetermined time before the use of the gas appliance is completed.

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