JP2011158147A - Gas flow rate measuring device, gas flow rate measuring method, gas flow rate measuring program, and gas supply system using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To further ensure safety in using a gas by controlling gas supply according to an operating state of a ventilator. <P>SOLUTION: This gas flow rate measuring device 2 for measuring a flow rate of the gas for a gas appliance and controlling the flow rate of the gas, includes a flow rate measuring section 23 for measuring the flow rate of the gas for the gas appliance, a flow channel blocking section 22 capable of blocking off the gas supply, and a communicating section 20 receiving an operation state signal relating to the ventilator, indicating an operation state of the ventilator for ventilating the indoor air, from an external device. A control section 200 blocks off the gas supply by the flow channel blocking section 22 in a case when the communicating section 20 cannot receive the operation state signal, or the operation of the ventilator based on the received operation state signal is in a prescribed state. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a technique for controlling the supply of gas to a gas appliance in accordance with the operating state of a ventilator.

  Conventionally, various methods have been proposed for preventing gas leakage or measures for leakage. For example, Patent Document 1 proposes providing an automatic shut-off valve in the gas supply pipe that detects the pressure of the gas outflow portion and automatically determines the combustion state of the gas appliance and always closes during non-combustion. Yes. The present technology provides safety by closing the automatic shut-off valve when the gas combustion state of the gas appliance to be monitored is different from the normal combustion pattern at the time of gas appliance combustion determined by the gas flow rate or the like.

  Moreover, in the said technique, the control which opens and closes a ventilation fan automatically is also provided, and the further safety measure is taken by controlling to open a ventilation fan at the time of combustion or gas leak.

JP 2008-267774 A

  However, when the ventilation fan is broken or when the power supply of the ventilation fan is intentionally turned off, it is impossible to ensure safety by controlling the ventilation fan in conjunction with the gas supply. That is, no technology is provided for controlling the supply of gas in accordance with the operating state of a ventilator including a ventilator or a range hood.

  The present invention provides a technique for controlling the supply of gas to a gas appliance in accordance with the operating state of a ventilator to ensure further safety.

  A gas flow rate measuring device of the present invention is a gas flow rate measuring device that measures the flow rate of gas for a gas appliance and controls the flow rate of the gas, a flow rate measuring unit that measures the flow rate of the gas for the gas appliance, and a gas A flow path blocking unit capable of blocking the supply of air, a communication unit capable of receiving an operation state signal related to a ventilation device indicating an operation state of a ventilation device for ventilating indoor air from an external device, the flow rate measurement unit, A control unit that controls a flow path blocking unit, wherein the control unit receives the operation state signal when a flow rate of gas measured by the flow rate measurement unit is equal to or higher than a predetermined flow rate. When the air flow cannot be performed, or when the operation state of the ventilation device based on the received operation state signal is a predetermined state, the gas supply is blocked by the flow path blocking unit.

  According to the said structure, since supply of gas can be controlled according to the presence or absence of the operation state of a ventilation apparatus or an operation state, safety can be made more reliable.

  In the gas flow measuring device, a ventilator registration unit capable of registering information on a plurality of ventilators can be provided.

  According to the above configuration, it is possible to perform various controls according to the ventilator by registering information on the ventilator in the gas flow rate measuring device in advance, and the convenience of the gas flow rate measuring device can be increased.

  The ventilator registration unit can register invalid processing that does not block the supply of gas for a predetermined ventilator regardless of whether or not the operation state signal is received.

  According to the said structure, it becomes possible to cancel | release the control of this invention about a predetermined | prescribed ventilation apparatus, and this invention can be applied flexibly according to a condition.

  The gas flow measuring device further includes an appliance registration unit capable of registering appliance information of the gas appliance, and the ventilation device registration unit associates the registered ventilation device with the gas appliance registered in the appliance registration unit. Can be registered.

  According to the above configuration, the gas appliance corresponding to the ventilation device can be understood, and various controls such as controlling the supply of gas to the gas appliance can be performed.

  Further, according to the present invention, there is provided a gas supply system comprising: the gas flow rate measuring device; and the detection device as the external device that generates the operation state signal and transmits the operation state signal to the communication unit of the gas flow rate measuring device. Provided.

  According to the said structure, the gas supply system with which further safety | security was ensured is provided.

  In addition, the detection device corresponds to an operation state detection unit that detects an operation state of the ventilation device, a communication unit that communicates with the gas flow rate measurement device, and an operation state of the ventilation device that is detected by the operation state detection unit. And a detection control unit that generates the operating state signal and transmits the operating state signal to the gas flow rate measuring device via the communication unit.

  In the above configuration, when the operation state detection unit cannot detect the operation state of the ventilator or when it detects that the ventilator is in a predetermined state, the detection control unit passes the communication unit. An alarm activation command can also be transmitted to the alarm device.

  According to the said structure, since an alarm device can be controlled according to the presence or absence of the operation state of a ventilation apparatus or an operation state, safety can be made more reliable.

  Furthermore, the present invention is a computer-implemented gas flow rate measurement method, which shows a flow rate measurement step for measuring the flow rate of gas for a gas appliance, and an operating state of a ventilation device for ventilating indoor air from an external device. A step of receiving an operation state signal relating to a ventilator, and a case where the operation state signal cannot be received when the gas flow rate measured by the flow rate measuring unit is equal to or higher than a predetermined flow rate; or the received operation state signal A gas flow rate measuring method comprising: a step of shutting off the supply of gas when the operation of the ventilation device based on is in a predetermined state.

  Furthermore, the present invention provides a gas flow rate measurement program for causing a computer that controls gas supply to execute the following steps: a flow rate measurement step for measuring a gas flow rate for a gas appliance; Receiving an operation state signal related to a ventilator indicating an operation state of a ventilator that ventilates air; and receiving the operation state signal when a gas flow rate measured by the flow rate measurement unit is equal to or higher than a predetermined flow rate. If the operation of the ventilator based on the received operation state signal is in a predetermined state, a gas flow rate measurement program is also provided that causes the computer to execute a step of shutting off the gas supply.

  Furthermore, the present invention also provides a gas supply system using the gas flow rate measuring method or the gas flow rate measuring program.

  According to the present invention, since the supply of gas can be controlled according to the operating state of the ventilator or the presence or absence of detection of the operating state, safety during use of the gas can be further ensured.

The figure of the gas supply system in the embodiment of the present invention Block diagram of gas flow measurement device and gas supply control device Graph showing changes in gas flow rates that differ for each gas appliance Table showing correspondence between gas appliances and ventilation equipment Block diagram of gas flow measuring device and gas supply control device of other embodiment

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram showing an embodiment of a gas supply system including a gas flow rate measuring device of the present invention. The gas supply system supplies gas to each home or office, and includes at least a gas flow rate measuring device and a detection device capable of transmitting an operation state signal corresponding to the operation state of the ventilator to the gas flow rate measuring device.

  As shown in FIG. 1, a gas flow measuring device 2 that measures the flow rate of gas for gas appliances and controls the flow rate of gas is installed at the inlet of a gas supply pipe 1 that supplies gas to each home or office. Has been. The gas pipe 3 installed after passing through the gas flow rate measuring device 2 branches and is piped to a place where various gas appliances used in each home are installed, and gas is supplied. For example, a water heater 4 is installed outdoors, and hot water generated by the water heater 4 is supplied to a bath 6 or the like in which a bathtub or a shower device is installed via a water pipe.

  In addition, when indoors, gas is supplied to the gas table 5 installed in the kitchen, the first gas fan heater 7 installed in the living room, and the second gas fan heater 8 installed in the bedroom. It is used accordingly. Of course, the types of gas appliances are not limited to the gas table 5, the first gas fan heater 7, and the second gas fan heater 8.

  And corresponding to each of the gas table 5, the first gas fan heater 7, and the second gas fan heater 8, the range hood 11 as a ventilator for discharging the generated gas to the outside and ventilating the indoor air, A ventilation fan 12 and a ventilation fan 13 are provided in the room. If the indoor air can be ventilated, the type of the ventilator is not limited.

  Furthermore, corresponding to each of the range hood 11, the ventilation fan 12, and the ventilation fan 13, these operation states are detected, wirelessly communicated with the gas flow rate measuring device 2, and operations related to the operation states of the range hood 11, the ventilation fan 12, and the ventilation fan 13. Detection devices 30 </ b> A, 30 </ b> B, and 30 </ b> C that transmit a state signal to the gas flow rate measuring device 2 are provided. The detection device 30A is built in the range hood 11 from the time of manufacture. Although the detection device 30B is directly attached to the ventilation fan 12, the detection device 30B is attached to the ventilation fan 12 later like an adapter after only the ventilation fan 12 is attached indoors. The detection device 30C is built in the ventilation fan 13 from the time of manufacture.

  The range hood 11, the ventilation fan 12, and the ventilation fan 13 are each connected to a power source via an outlet 40. As will be described later, the detection device detects the operating states of the range hood 11, the ventilation fan 12, and the ventilation fan 13 depending on whether power is supplied to the range hood 11, the ventilation fan 12, and the ventilation fan 13.

  The gas supply system is provided with an alarm device 50. The alarm device 50 notifies the resident with an alarm sound or the like when the CO concentration level is higher than a predetermined value. In the present embodiment, the alarm device 50 receives an alarm activation command in a predetermined case from the communication unit 20 of the gas flow rate measuring device 2 described later.

  FIG. 2 is a block diagram of the detection device and the gas flow rate measuring device. The gas flow rate measuring device 2 includes a flow channel 21, a flow channel blocking unit 22, a flow rate measurement unit 23, an appliance determination unit 24, a measured flow rate information storage unit 25, an appliance-specific flow rate calculation unit 26, and an appliance registration unit. 27, a ventilator registration unit 28, an operation unit 29, and a communication unit 20. A control unit 200 that controls the operation of the gas flow rate measuring device 2 by the appliance discriminating unit 24, the measured flow rate information storage unit 25, the appliance-specific flow rate calculation unit 26, the appliance registration unit 27, and the ventilation device registration unit 28. Is configured. The control unit 200 processes information input from the flow rate measurement unit 23, the operation unit 29, and the communication unit 20. Further, the control unit 200 can control the flow path blocking unit 22 to block the gas supply.

  The flow rate measuring unit (ultrasonic flow meter) 23 measures the flow rate by emitting ultrasonic waves to the gas as the fluid flowing in the flow path 21 through the gas supply pipe 1. Can be used. The measured flow rate information storage unit 25 includes target flow data (measured flow rate change pattern as shown in FIG. 3) described in association with the measured flow rate value measured by the flow rate measuring unit 23 and the measurement time when the measured flow rate value was measured. ) Is memorized.

  The appliance registration unit 27 registers various appliance information for each gas appliance such as the gas table 5, the first gas fan heater 7, and the second gas fan heater 8 connected downstream of the flow path 21. . Examples of the appliance information include an initial flow rate value that represents a flow rate at the time of activation of the gas appliance, and a change flow value that represents a change flow rate when the operation state changes. For example, as shown in FIG. 3, the absolute value A and the absolute value B of the flow rate which are different for each gas appliance (FIG. 3A), the flow rate change C and the flow rate change D which are different for each gas appliance at the start of operation (FIG. 3). Gas appliances can also be specified and registered by appliance information such as (b)).

  The appliance discriminating unit 24 is a flow rate change pattern obtained from the measured flow rate change pattern (corresponding to the measurement time and the measured flow rate value) stored in the measured flow rate information storage unit 25 and the appliance information registered in the appliance registration unit 27. Are compared to determine a gas appliance that uses a fluid gas. The appliance-specific flow rate calculation unit 26 calculates the flow rate for each gas appliance determined by the appliance determination unit 24.

  The channel blocker (channel block valve) 22 closes the channel 21 in an emergency or the like, and blocks the flowing gas. In this embodiment, the communication unit 20 cannot receive an operation state signal related to the operation state of the ventilator (the range hood 11, the ventilation fan 12, and the ventilation fan 13), or the received operation state signal indicates that the ventilator is not operating. In this case, the control unit 200 issues a gas cutoff command for shutting off the gas supply to the flow path cutoff unit 22. Receiving the gas cutoff command, the flow path blocking unit 22 closes the flow path 21 and blocks the gas flow.

  The communication unit 20 includes a detection device 30 (including the detection devices 30A, 30B, and 30C in FIG. 1) built in the ventilation devices 11 and 13 (the range hood 11 and the ventilation fan 13) or attached to the ventilation device 12 (the ventilation fan 12). An operation state signal including information on the operation state of the sent ventilator is received. The ventilator registration unit 28 is a part that registers and stores information on a plurality of ventilators used indoors. The operation unit 29 includes various switches, buttons, a touch panel, and the like. When a user such as a resident operates the operation unit 29, the ventilator registration unit 28 may register information on a ventilator that is newly used or delete information on a ventilator that has already been registered. It becomes possible.

  In addition, for a predetermined ventilation device, regardless of the operation state, the user inputs invalidation processing for invalidating the operation of the present invention that activates the gas control by the detection device 30 from the operation unit 29, and the ventilation device registration unit It is also possible to register the invalidation process 28.

  Ventilators 11, 12, 13 (range hood 11, ventilator 12, ventilator 13 in FIG. 1) are provided with detection device 30. In FIG. 1, detection devices 30 </ b> A and 30 </ b> C are built in the range hood 11 and the ventilation fan 13, and the detection device 30 </ b> B is attached to the outside of the ventilation fan 12. In FIG. 2, for convenience, all the detection devices 30 are illustrated in a state of being incorporated in the ventilation devices 11, 12, and 13.

  The detection device 30 includes an operation state detection unit 31 and a communication unit 33. The operating state detection unit 31 detects the operating state of the ventilator. For example, is power supplied from the outlet 40 of the ventilator to the drive unit 100 that controls the mechanical operation (fan rotation, etc.) of the ventilator? Depending on whether or not, it is possible to detect the operating state of the ventilator (whether it is operating or stopped).

  The communication unit 33 transmits an operation state signal indicating the operation state of the ventilation device to the communication unit 20 of the gas flow rate measuring device 2. However, when the operation state detection unit 31 cannot detect the operation state of the ventilation device, for example, when the detection device 30 is removed from the ventilation device, the communication unit 33 does not transmit the operation state signal. The communication unit 20 of the flow rate measuring device 2 cannot receive the operation state signal. Of course, the communication between the communication unit 33 and the communication unit 20 may be wired communication.

  The specific operation is as follows. That is, (1) When the gas flow rate measuring device 2 detects that the flow rate predetermined by the flow rate measuring unit 23 or the operation of the specific gas appliance is detected by the appliance discriminating unit 24, the communication unit 20 The output request | requirement which requests | requires the operation state of a ventilation apparatus is transmitted to the detection apparatus 30 which is an external apparatus for every time, and the operation state signal corresponding to the said output request | requirement is received from the detection apparatus 30. Here, when the received operation state signal indicates that the ventilator is not operating, the control unit 200 outputs a gas cutoff command to the flow rate cutoff unit 22, and the flow rate cutoff unit 22 closes the flow path 21 to supply gas. Cut off. Further, (2) the communication unit 20 of the gas flow rate measuring device 2 transmits an output request for requesting the operation state of the ventilation device to the detection device 30 at regular intervals, but the operation corresponding to the output request from the detection device 30. The status signal may not be received. Therefore, if the operation state signal cannot be received from the detection device 30 even if the output request is transmitted a predetermined number of times, it is determined that communication is impossible, and the control unit 200 outputs a gas cutoff command to the flow rate cutoff unit 22, and the flow rate cutoff unit 22. Closes the flow path 21 and blocks the gas.

  The predetermined number of times that it is determined that communication is impossible is set according to the flow rate measured by the flow rate measurement unit 23, for example, small for a large flow rate and large for a small flow rate, thereby ensuring safety. An inadvertent erroneous interruption may be prevented.

  Moreover, the control part 200 of the gas flow rate measuring device 2 is the communication part 20 when the communication part 20 cannot receive an operation state signal, or when the received operation state signal shows that the ventilation apparatus is not operating. An alarm activation command can also be transmitted to the alarm device 50 via wireless communication via wireless communication. Further, it is possible to report to a center (not shown) that manages gas supply.

  Moreover, the control part 200 of the gas flow rate measuring device 2 is the communication part 20 when the communication part 20 cannot receive an operation state signal, or when the received operation state signal shows that the ventilation apparatus is not operating. A command for lowering the CO detection level (lowering the CO concentration threshold for alarm activation) can also be transmitted to the alarm device 50 via wireless communication.

  It is also possible to store the ventilation device and the gas appliance in a one-to-one correspondence. In the table shown in FIG. 4, a correspondence between a predetermined gas appliance and a ventilator provided corresponding to CO generated from the gas appliance is recorded. A registration unit for holding the table can be separately provided in the gas flow rate measuring device 2, for example, the ventilation device registration unit 28. For example, the table shown in FIG. 4 can be created when the user inputs information for associating the ventilation device registered in the ventilation device registration unit 28 with the gas appliance registered in the appliance registration unit 27 from the operation unit 29.

  It is also possible to create the table of FIG. 4 by learning without creating the table of FIG. 4 in advance. For example, the ventilator used when a predetermined gas appliance is moved is stored, and when the same gas appliance / ventilator combination operation continues several times, a table as shown in FIG. 4 is created to measure the gas flow rate. You may make it memorize | store in the apparatus 2. FIG.

  According to the present invention, it is possible to further ensure safety measures against CO leakage by considering the operating state of a ventilator such as a ventilating fan or a range hood in determining whether or not gas can be supplied. In addition, it is possible to detect a state in which the ventilator does not operate when the gas appliance is used, and to shut off the gas, so that it is possible to ensure safety measures. Furthermore, since the detection device 30 of the present invention can be attached to an existing ventilation device such as the ventilation fan 12, it can be applied to an existing ventilation device.

  In addition, although the said embodiment demonstrated the case where ventilation by a ventilator was required when a gas appliance was used, it is a specific gas appliance, or in a specific installation state, it is a ventilator at the time of use of a gas appliance. Some ventilation is prohibited. For example, a CF type furama (not shown) is a semi-enclosed gas appliance that is installed in a bathroom. Since exhaust gas is discharged to the outdoors by natural ventilation, the exhaust gas is generated by the operation of a ventilation fan. May be drawn indoors. In such a case, the control unit 200 of the gas flow rate measuring device 2 can be used when the communication unit 20 cannot receive the operation state signal, or when the received operation state signal indicates that the ventilation device is operating. An alarm activation command can be transmitted to the alarm device 50 via the communication unit 20 by wireless communication, or a gas cutoff command can be output to the flow path cutoff unit 22 to shut off the gas.

  That is, when the communication unit 20 cannot receive the operation state signal when the gas flow rate measured by the flow rate measurement unit 23 is equal to or higher than the predetermined flow rate, the control unit 200 supplies the gas by the flow path blocking unit 22. Shut off. In addition, the control unit 200 is suitable for the gas appliance corresponding to the ventilation device corresponding to the ventilation device operation state signal when the operation of the ventilation device based on the operation state signal received by the communication unit 20 is in a predetermined state. If not (if the ventilator is not operating for the range hood 11, the ventilating fan 12, and the ventilating fan 13 of the embodiment, if the ventilator is operating for the CF bath), The supply of gas is blocked by the flow path blocking unit 22.

  If an alarm device is installed in the vicinity of the CF-type furama, by registering the invalidation processing of the corresponding ventilation fan in the ventilation device registration unit 28 as described above, the device can be operated regardless of the operation / non-operation of the ventilation fan. Can be used and safety can be ensured.

  Further, in associating the ventilator registered in the ventilator registration unit 28 with the gas appliance registered in the appliance registering unit 27, the condition of the combination of the operating state of the gas appliance and the ventilator that requires gas shutoff If it is configured to be registered, even if gas equipment that requires ventilation and gas equipment that is not needed are mixed, it will not impair safety.

  FIG. 5 shows another embodiment of the present invention. In the present embodiment, the detection device 30 includes an operation state detection unit 31, a detection control unit 32, and a communication unit 33. The detection control unit 32 detects that the operation state detection unit 31 cannot detect the operation state of the ventilator for some reason or the operation state detection unit 31 detects that the ventilator is not operating (described above). If it is detected that the ventilator is operating for the CF bath, the operation state signal related to the ventilator indicating that fact is generated and sent to the gas flow rate measuring device 2 via the communication unit 33. The operation state signal is transmitted by wireless communication. The communication unit 33 normally exchanges predetermined signals with the communication unit 20 of the gas flow rate measuring device 2. As described above, the operating state detection unit 31 cannot detect the operating state of the ventilator, or the ventilator is not operating (the ventilator operates for the above-described CF-type bathing bowl). In response to an instruction from the detection control unit 32, the communication unit 33 transmits an operation state signal to the communication unit 20 of the gas flow rate measuring device 2 by wireless communication. Of course, the communication between the communication unit 33 and the communication unit 20 may be wired communication.

  That is, in the embodiment of FIG. 2, the sensing device 30 either simply sent an operating state signal or nothing. In the present embodiment, the detection device 30 actively transmits to the gas flow rate measurement device 2 that the operating state of the ventilation device cannot be detected.

  In the present embodiment, the detection control unit 32 indicates that the operation state detection unit 31 cannot detect the operation state of the ventilator for some reason, or that the ventilator is in a predetermined state (the range hood 11 of the embodiment, If it is detected that the ventilator is not operating for the ventilating fan 12 and the ventilating fan 13 and that the ventilator is operating for the above-described CF bath, the alarm is issued via the communication unit 33. An alarm activation command can also be transmitted to the device 50 by wireless communication.

  Further, in the present embodiment, the detection control unit 32 has detected the CO detection value by the alarm device 50 higher than a predetermined value even when the operation state detection unit 31 detects that the ventilation device is operating. In this case, a gas cutoff command can be transmitted to the gas flow rate measuring device 2 via the communication unit 33 by wireless communication.

  In addition, in order to implement the gas flow rate measuring method executed by the gas flow rate measuring device 2 described above, a program (computer) (not shown) of the gas flow rate measuring device 2 executes each step of the gas flow rate control method. Is remembered.

  Although the above explanation has been given for the case where an ultrasonic flowmeter is used, it is obvious that the same effect can be obtained with other instantaneous flow rate measuring devices.

  Although various embodiments of the present invention have been described above, the present invention is not limited to the matters shown in the above-described embodiments, and those skilled in the art can make modifications and applications based on the description and well-known techniques. This is also the scope of the present invention, and is included in the scope for which protection is sought.

  As described above, according to the present invention, the gas flow measuring device, the gas flow measuring method, which can control the supply of gas according to the presence or absence of detection of the operating state of the ventilator or the operating state, and ensure higher safety, A gas flow measurement program and a gas supply system using them can be provided.

DESCRIPTION OF SYMBOLS 1 Gas supply pipe 2 Gas flow measuring device 3 Gas piping 4 Water heater 5 Gas table 6 Bath 7 1st gas fan heater 8 2nd gas fan heater 11 Range hood (ventilation apparatus)
12 Ventilation fan (ventilator)
13 Ventilation fan (ventilator)
DESCRIPTION OF SYMBOLS 20 Communication part 21 Flow path 22 Flow path interruption | blocking part 23 Flow measurement part 24 Instrument discrimination | determination part 25 Measurement flow rate information storage part 26 Instrument-specific flow rate calculation part 27 Instrument registration part 28 Ventilation apparatus registration part 29 Operation part 30 Detection apparatus 31 Operation state detection Unit 32 detection control unit 33 communication unit 40 outlet 50 alarm device 100 drive unit 200 control unit

Claims (10)

A gas flow measuring device that measures the flow rate of gas for gas appliances and controls the flow rate of gas,
A flow rate measuring unit for measuring the flow rate of gas for gas appliances;
A flow path blocking unit capable of blocking gas supply;
A communication unit capable of receiving an operation state signal related to a ventilation device indicating an operation state of the ventilation device for ventilating indoor air from an external device;
A controller that controls the flow rate measuring unit and the flow path blocking unit;
When the flow rate of gas measured by the flow rate measurement unit is equal to or higher than a predetermined flow rate, the control unit is unable to receive the operation state signal, or based on the received operation state signal A gas flow rate measuring device that shuts off the supply of gas by the flow path blocking unit when the operation of the ventilation device is in a predetermined state. The gas flow rate measuring device according to claim 1,
A gas flow rate measuring device further comprising a ventilator registration unit capable of registering information on a plurality of ventilators. A gas flow rate measuring device according to claim 2,
The said ventilation apparatus registration part is a gas flow measuring device which can register the invalid process which does not interrupt | block the supply of gas irrespective of the presence or absence of reception of the said operation state signal about a predetermined ventilation apparatus. A gas flow rate measuring device according to claim 2,
An appliance registration unit capable of registering appliance information of the gas appliance;
The said ventilation apparatus registration part is a gas flow measuring device which can register the matching of the registered ventilation apparatus and the gas appliance registered into the said instrument registration part.   5. A gas flow rate measurement device according to claim 1, and a detection device as the external device that generates the operation state signal and transmits the operation state signal to the communication unit of the gas flow rate measurement device. Gas supply system. The gas supply system according to claim 5,
The detection device is:
An operation state detection unit for detecting an operation state of the ventilation device;
A communication unit communicating with the gas flow rate measuring device;
A detection control unit that generates an operation state signal according to the operation state of the ventilation device detected by the operation state detection unit and transmits the operation state signal to the gas flow rate measurement device via the communication unit;
A gas supply system comprising: The gas supply system according to claim 6,
The detection control unit
When the operation state detection unit cannot detect the operation state of the ventilator or when it detects that the ventilator is in a predetermined state, an alarm activation command is transmitted to the alarm device via the communication unit. Gas supply system. A gas flow measurement method executed by a computer,
A flow rate measuring step for measuring a flow rate of gas for the gas appliance;
Receiving, from an external device, an operating state signal relating to a ventilator that indicates an operating state of the ventilator that ventilates room air;
When the gas flow rate measured by the flow rate measuring unit is greater than or equal to a predetermined flow rate, when the operation state signal cannot be received, or the operation of the ventilator based on the received operation state signal is in a predetermined state If present, shutting off the gas supply;
A gas flow rate measuring method comprising: A gas flow measurement program that causes a computer that controls gas supply to execute the following steps:
A flow rate measuring step for measuring a flow rate of gas for the gas appliance;
Receiving, from an external device, an operating state signal relating to a ventilator that indicates an operating state of the ventilator that ventilates room air;
When the gas flow rate measured by the flow rate measuring unit is greater than or equal to a predetermined flow rate, when the operation state signal cannot be received, or the operation of the ventilator based on the received operation state signal is in a predetermined state If present, shutting off the gas supply;
A gas flow measurement program that runs a computer.   A gas supply system using the gas flow rate measuring method or the gas flow rate measuring program according to claim 8 or 9.

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