WO2019159877A1 - 燃焼装置 - Google Patents
燃焼装置 Download PDFInfo
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- WO2019159877A1 WO2019159877A1 PCT/JP2019/004804 JP2019004804W WO2019159877A1 WO 2019159877 A1 WO2019159877 A1 WO 2019159877A1 JP 2019004804 W JP2019004804 W JP 2019004804W WO 2019159877 A1 WO2019159877 A1 WO 2019159877A1
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- Prior art keywords
- monitoring
- proportional valve
- voltage
- gas proportional
- circuit
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 54
- 238000012544 monitoring process Methods 0.000 claims abstract description 102
- 238000000034 method Methods 0.000 claims description 30
- 239000007789 gas Substances 0.000 description 77
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 23
- 238000003745 diagnosis Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- KNZUAMRYQXIWSR-RUAUHYFQSA-N curan Chemical compound C1=CC=C2[C@@]3([C@@H]4C5)CCN4C[C@@H](CC)[C@H]5[C@@H](C)[C@@H]3NC2=C1 KNZUAMRYQXIWSR-RUAUHYFQSA-N 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K5/00—Feeding or distributing other fuel to combustion apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
- F23N5/242—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electronic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/0027—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters using fluid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/18—Water-storage heaters
- F24H1/186—Water-storage heaters using fluid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/10—Control of fluid heaters characterised by the purpose of the control
- F24H15/104—Inspection; Diagnosis; Trial operation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/305—Control of valves
- F24H15/31—Control of valves of valves having only one inlet port and one outlet port, e.g. flow rate regulating valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
Definitions
- the present invention relates to a combustion apparatus such as a gas hot water supply apparatus.
- a gas proportional valve is provided in the gas supply path in order to supply a desired gas to the burner.
- the gas proportional valve controls the gas supply amount by changing the opening of the valve according to the magnitude of the drive current. If a large amount of drive current flows to this gas proportional valve for some reason, problems such as the hot water temperature becoming abnormally high will occur. Conventionally, a monitoring circuit for monitoring the drive current of the gas proportional valve has been provided. Yes.
- Patent Document 1 describes a combustion control device including a proportional valve current detection circuit for detecting the opening of a gas proportional valve.
- Patent Document 2 describes a gas combustion device including a driving current monitoring circuit that outputs a monitoring voltage signal corresponding to a current value of a driving current of a gas proportional valve to a control unit.
- the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a combustion apparatus that can detect a failure of a monitoring circuit for a driving current of a gas proportional valve as reliably as possible.
- a combustion apparatus outputs a gas proportional valve for adjusting the amount of gas supplied to the combustion section, and an opening signal for controlling the gas proportional valve.
- a control circuit that supplies a driving current corresponding to the opening signal to the gas proportional valve, and a monitoring circuit that generates a monitoring voltage corresponding to the driving current and outputs the monitoring voltage to the control section.
- the monitoring circuit includes a voltage generation unit that generates a monitoring voltage according to the drive current, and a monitoring voltage generated by the voltage generation unit connected to each of two terminals of the control unit
- a branch output unit that outputs to each of the terminals through the two branched paths, and the control unit compares the monitoring voltages input to each of the two terminals, and When the voltage difference is greater than or equal to the criterion value
- a voltage difference between the monitoring voltages is the determination.
- a second determination process is performed to determine that the monitoring circuit is faulty when it is less than a reference value and at least one of the monitoring voltages is not within a predetermined normal range.
- a combustion apparatus includes a gas proportional valve for adjusting the amount of gas supplied to the combustion unit, and a control unit that outputs an opening degree signal for controlling the gas proportional valve,
- a combustion apparatus comprising: a drive circuit for supplying a drive current corresponding to the opening signal to the gas proportional valve; and a monitor circuit for generating a monitor voltage corresponding to the drive current and outputting the monitor voltage to the control unit.
- the monitoring circuit includes a voltage generation unit that generates a monitoring voltage according to the drive current, and a plurality of branches that are connected to each of the plurality of terminals of the control unit, the monitoring voltage generated by the voltage generation unit A branch output unit that outputs to each of the terminals through a path, and the control unit compares the monitoring voltage input to each of the plurality of terminals, and the maximum voltage difference between the monitoring voltages is The monitoring circuit when the reference value is equal to or greater than When performing the first determination process for determining that there is a failure and controlling the gas proportional valve to be in a predetermined state, the maximum voltage difference between the monitored voltages is the determination reference value. And when the at least one monitoring voltage is not within a predetermined normal range, a second determination process is performed to determine that the monitoring circuit is faulty.
- the first determination process determines that the monitoring circuit is faulty
- a failure of the branch output unit is considered, and the second determination process indicates that the monitoring circuit is faulty.
- the failure of the monitoring circuit for the drive current of the gas proportional valve can be detected as reliably as possible.
- the control unit may be configured to perform the second determination process using the first predetermined range as the normal range when the gas proportional valve is controlled to be in a closed state. . According to this configuration, the second determination process can be performed when the combustion operation by the combustion unit is not performed.
- the control unit uses the second predetermined range as the normal range when controlling the gas proportional valve to have a predetermined opening degree immediately before the ignition of the combustion unit or immediately before the ignition. You may be comprised so that a 2nd determination process may be performed. According to this configuration, the second determination process can be performed immediately before or at the initial stage of the combustion operation by the combustion unit.
- the control unit may be composed of a plurality of microcontrollers capable of communicating with each other, and each of the terminals may be provided in a different microcontroller.
- the present invention has the above-described configuration, and has an effect of providing a combustion device that can detect a failure of a monitoring circuit for a driving current of a gas proportional valve as reliably as possible.
- FIG. 1 is a circuit diagram illustrating an example of a drive circuit and a monitoring circuit of a gas proportional valve provided in the combustion apparatus of the present embodiment.
- FIG. 2 is a schematic diagram illustrating an example of a main part of the combustion apparatus of the present embodiment.
- FIG. 1 is a circuit diagram illustrating an example of a drive circuit and a monitoring circuit of a gas proportional valve provided in the combustion apparatus of the present embodiment.
- FIG. 2 is a schematic view showing an example of a main part of the combustion apparatus of the present embodiment.
- the combustion apparatus of the present embodiment is, for example, a gas hot water supply apparatus, and as shown in FIG. 2, heat exchange including a primary heat exchanger 16 a and a secondary heat exchanger 16 b in a can body (metal container) 20.
- the heat exchanger 16, the burner (combustion unit) 15 for heating the heat exchanger 16, the capacity switching electromagnetic valve 14, the gas proportional valve 13, and the original gas electromagnetic valve 12 are accommodated.
- the heat exchanger 16 includes a secondary heat exchanger 16b for recovering latent heat and a primary heat exchanger 16a.
- One end of the water inlet path 17 is connected to the inflow side of the secondary heat exchanger 16 b, and the other end of the water inlet path 17 is not shown, but is connected to the water supply, and the secondary heat exchanger 16 b is connected via the water inlet path 17. Water flows into the water.
- One end of the hot water path 18 is connected to the outflow side of the primary heat exchanger 16a, and the other end of the hot water path 18 is not shown.
- hot water flowing out from the other end side of the hot water path 18 After the temperature is adjusted by mixing with the water that is branched from the water and flowing in, it flows out from a hot water tap such as a curan through an external pipe.
- the heat exchanger 16 may be composed of one heat exchanger connected between the water inlet path 17 and the hot water path 18.
- the gas introduced from the gas supply source (not shown) through the gas pipe 11 is supplied to the burner 15 through the original gas solenoid valve 12, the gas proportional valve 13 and the capacity switching solenoid valve 14 in the open state. Burned.
- the original gas solenoid valve 12 and the capacity switching solenoid valve 14 are ON / OFF control solenoid valves.
- a plurality of capability switching solenoid valves 14 are provided so that the number of combustion tubes of the burner 15 can be switched in several stages.
- the gas proportional valve 13 is a proportional control electromagnetic valve, and the flow rate of gas supplied to the burner 15 can be adjusted by adjusting the opening degree.
- main microcontroller 2 (hereinafter referred to as “main microcomputer 2”) of the control unit 1 shown in FIG. Is done by.
- the control unit 1 provided in the present combustion apparatus is composed of a main microcomputer 2 and a sub-microcontroller 3 (hereinafter referred to as “sub-microcomputer 3”) which are connected so as to communicate with each other.
- the main microcomputer 2 controls the entire combustion apparatus.
- a circuit related to the gas proportional valve 13 will be described. As shown in FIG. 1, for example, a gas proportional valve 13, a resistor R1, a driving transistor Q1, and a resistor R2 are connected between a power line Vcc of 15V and a ground line in order from the power line Vcc side.
- a drive circuit 4 for supplying a drive current to the gas proportional valve 13 and a monitoring voltage (analog signal) corresponding to the current value of the drive current of the gas proportional valve 13 are generated and monitored by the main microcomputer 2 and the sub-microcomputer 3 respectively.
- the drive circuit 4 is configured by a constant current circuit that supplies a drive current corresponding to the opening signal to the gas proportional valve 13, and this constant current circuit includes an operational amplifier OP1 and performs voltage conversion for impedance conversion of the opening signal.
- the base of the driving transistor Q1 is connected to the output of the operational amplifier OP2, and the emitter of the driving transistor Q1 is connected to the inverting input terminal of the operational amplifier OP2.
- a negative feedback circuit is configured.
- a constant current is supplied to the gas proportional valve 13 as a drive current when equal to the reference voltage. This constant current is output from the emitter of the drive transistor Q1.
- the monitoring circuit 5 includes a voltage generation unit 51 and a branch output unit 52 having a plurality of branch paths.
- the voltage generator 51 includes a load resistor R2 connected to the emitter of the drive transistor Q1, and when a drive current flowing through the gas proportional valve 13 flows through the load resistor R2, a voltage corresponding to the drive current is changed to a load resistor. Occurs at R2.
- the voltage of the load resistor R2 is taken out through a low pass filter composed of a resistor R5 and a capacitor C1.
- the voltage (output voltage of the voltage generation unit 51) taken out through this low-pass filter is supplied to the branch output unit 52 and given to the monitoring voltage input terminal T1 of the main microcomputer 2 through the branch path having the resistor R6. And supplied to the monitoring voltage input terminal T2 of the sub-microcomputer 3 through a branch path having a resistor R7.
- the combustion apparatus of the present embodiment When the combustion apparatus is operated to burn, here, when the hot water supply operation of the gas hot water supply apparatus is performed, the main microcomputer 2 is connected to the set temperature input from the operation remote controller (not shown) or the like, the incoming water path 17 and the hot water path 18. Based on the detected value of a temperature sensor (not shown) provided, the fuel gas supply amount to the burner 15 is calculated, and the opening signal of the gas proportional valve 13 corresponding to the calculated amount is output from the output terminal T3.
- the main microcomputer 2 determines whether, for example, the voltage input to the input terminal T1 is equal to or lower than a predetermined allowable value during combustion of the burner 15, and the time exceeding the allowable value continues for a predetermined time. Then, it is determined that the drive circuit 4 has failed (for example, ON failure of the drive transistor Q1), and a predetermined safety process (for example, closing control of the original gas solenoid valve 12 and the capacity switching solenoid valve 14) is performed.
- a predetermined safety process for example, closing control of the original gas solenoid valve 12 and the capacity switching solenoid valve 14
- the main microcomputer 2 performs failure diagnosis of the monitoring circuit 5 based on the voltage value of the input terminal T1 and the voltage value of the input terminal T2 of the sub-microcomputer 3.
- the sub-microcomputer 3 information on the voltage value given to the input terminal T2 is transmitted to the main microcomputer 2.
- a failure diagnosis method for the monitoring circuit 5 will be described.
- the main microcomputer 2 performs a first determination process and a second determination process in order to diagnose a failure of the monitoring circuit 5.
- the main microcomputer 2 compares the voltage value of the terminal T1 with the voltage value of the terminal T2, and if the difference between these voltage values is equal to or greater than a predetermined determination reference value, the monitoring circuit 5 Is determined to be malfunctioning. In this case, a failure of the branch output unit 52 such as an open failure in which the terminals T1 and T2 are lifted from the transmission line due to solder cracks, or an open failure in which the resistors R6 and R7 are lifted from the transmission line can be considered. .
- This first determination process can be performed at any time, regardless of whether the combustion operation of the burner 15 is performed, that is, regardless of the operation state of the gas proportional valve 13.
- the main microcomputer 2 controls the difference between the voltage value at the terminal T1 and the voltage value at the terminal T2 when controlling the gas proportional valve 13 to be in a predetermined state. Is less than the determination reference value, and it is determined that the monitoring circuit 5 has failed if the voltage value of either of the terminals T1 and T2 is not within the normal range. In this case, a failure of the voltage generation unit 51 such as an open failure that causes the resistor R5 to float from the transmission line can be considered.
- the second determination process can be roughly divided into first and second cases described below.
- the burner 15 when the burner 15 is not performing the combustion operation, that is, when the gas proportional valve 13 is not operated (the gas proportional valve 13 is closed), Monitoring when the difference between the voltage value of the terminal T1 and the voltage value of the terminal T2 is less than the determination reference value and the voltage value of either of the terminals T1 and T2 is not within the first predetermined range (normal range). It is determined that the circuit 5 (voltage generation unit 51) has failed.
- the drive current does not flow through the gas proportional valve 13 and the applied voltage at both terminals T1 and T2 is 0V.
- the resistor R5 of the voltage generation unit 51 becomes an open failure, the voltage values of the terminals T1 and T2 are uniquely determined by the input impedance and voltage inside the microcomputers 2 and 3, and do not become 0V. If the branch output unit 52 is normal, the applied voltages at both terminals T1 and T2 are equal.
- the first predetermined range described above can be set to a range that can be regarded as 0V to approximately 0V (for example, a range of 0V to 0.5V).
- the combustion apparatus of the present embodiment when the combustion operation of the burner 15 is performed, the operation of the gas proportional valve 13 is checked immediately before the burner 15 is ignited, and the electromagnetic valves 12 and 14 are closed and the gas is closed.
- the proportional valve 13 is fully opened (predetermined opening degree A) and then closed. If there is an abnormality in the operation check, the combustion operation is stopped. If there is no abnormality, the solenoid valves 12 and 14 are opened, and the burner is operated with the gas proportional valve 13 set to a predetermined opening B slightly smaller than the opening A. 15 ignitions are performed. Therefore, immediately before ignition of the burner 15, the gas proportional valve 13 is set to a predetermined opening A, and at the initial stage of ignition of the burner 15, the gas proportional valve 13 is set to a predetermined opening B.
- the monitoring voltage corresponding to the drive current flowing through the gas proportional valve 13 The normal range (second predetermined range) is stored in the main microcomputer 2 in advance.
- the normal range (second predetermined range) of the drive current and the monitoring voltage is naturally different between the opening degree A (fully open) and the opening degree B. For example, if the normal range (second predetermined range) of the monitoring voltage in the case of the opening A (fully open) is 4.5 ⁇ 0.2 V, the normal range of the monitoring voltage in the case of the opening B (first) 2 predetermined range) is a slightly lower level than the range for the opening degree A.
- the main microcomputer 2 controls the gas proportional valve 13 to the opening B when the gas proportional valve 13 is controlled to the opening A (fully opened) immediately before the burner 15 is ignited, or at the initial stage of ignition of the burner 15.
- the difference between the voltage value of the terminal T1 and the voltage value of the terminal T2 is less than the determination reference value, and the voltage value of either one of the terminals T1 and T2 is a second predetermined range corresponding to each case. When it is not within the (normal range), it is determined that the monitoring circuit 5 (voltage generation unit 51) has failed.
- the failure determination process in the second case may be performed in either case of opening degree A (fully open) or opening degree B, or in both cases. May be.
- predetermined safety processing for example, the solenoid valves 12 and 14 and the gas proportional valve 13 are performed. Is closed, the gas supply to the burner 15 is shut off, the combustion operation is stopped, and the combustion operation is stopped immediately before the combustion operation.
- a failure of the branch output unit 52 is considered, and by the second determination process, it is determined that the monitoring circuit 5 is faulty.
- a failure of the voltage generator 51 is considered. Thereby, the failure of the monitoring circuit 5 for the drive current of the gas proportional valve 13 can be detected as reliably as possible.
- the failure diagnosis of the monitoring circuit 5 is performed by the main microcomputer 2.
- the sub microcomputer 3 transmits the information of the voltage value of the terminal T1 from the main microcomputer 2 to the sub microcomputer 3.
- a failure diagnosis of the monitoring circuit 5 may be performed.
- the failure diagnosis of the monitoring circuit 5 may be performed by both the main microcomputer 2 and the sub-microcomputer 3.
- control unit 1 is composed of two microcomputers, ie, the main microcomputer 2 and the sub-microcomputer 3, it may be composed of one microcomputer.
- two branch paths are provided as the branch output unit 52.
- three or more branch paths are provided, and the output ends of the respective branch paths are connected to the respective terminals of the control unit 1, Based on the terminal voltage (monitoring voltage), failure diagnosis (first and second determination processing) of the monitoring circuit 5 may be performed.
- the first determination process compares the monitoring voltages input to the respective terminals of the control unit 1, and if the maximum voltage difference between the monitoring voltages is equal to or greater than the determination reference value, the monitoring circuit has failed.
- the second determination process is performed between the monitored voltages input to the respective terminals.
- the present invention is useful as a combustion apparatus or the like that can detect a failure of a monitoring circuit for a driving current of a gas proportional valve as reliably as possible.
Abstract
Description
また、特許文献2には、ガス比例弁の駆動電流の電流値に応じた監視電圧信号を制御部に出力する駆動電流監視回路を備えたガス燃焼機器が記載されている。
図1は、本実施形態の燃焼装置に備えられるガス比例弁の駆動回路及び監視回路等の一例を示す回路図である。また、図2は、本実施形態の燃焼装置の主要部の一例を示す概略図である。
本燃焼装置を燃焼動作させる際、ここではガス給湯装置の給湯運転を行う際、メインマイコン2は、操作リモコン(図示せず)等から入力される設定温度や、入水経路17や出湯経路18に設けられている温度センサ(図示せず)等の検出値に基づいて、バーナ15への燃料ガス供給量を算出し、それに応じたガス比例弁13の開度信号を出力端子T3から出力する。
2 メインマイクロコントローラ
3 サブマイクロコントローラ
4 駆動回路
5 監視回路
51 電圧生成部
52 分岐出力部
13 ガス比例弁
15 バーナ
Claims (5)
- 燃焼部へ供給するガス量を調整するためのガス比例弁と、このガス比例弁を制御するための開度信号を出力する制御部と、前記開度信号に応じた駆動電流を前記ガス比例弁に供給するための駆動回路と、前記駆動電流に応じた監視電圧を生成し前記制御部に出力する監視回路とを備えた燃焼装置であって、
前記監視回路は、
前記駆動電流に応じた監視電圧を生成する電圧生成部と、前記電圧生成部で生成される監視電圧を前記制御部の2つの端子の各々に接続された2つの分岐経路を通じて各々の前記端子へ出力する分岐出力部と、を有し、
前記制御部は、
前記2つの端子の各々に入力される前記監視電圧を比較し、前記監視電圧間の電圧差が判定基準値以上である場合に、前記監視回路の故障であると判定する第1の判定処理を行うとともに、前記ガス比例弁を予め定められた状態となるように制御しているときに、前記監視電圧間の電圧差が前記判定基準値未満であり、かつ、少なくとも1つの前記監視電圧が予め定められた正常範囲内ではない場合に、前記監視回路の故障であると判定する第2の判定処理を行うよう構成された、
燃焼装置。 - 燃焼部へ供給するガス量を調整するためのガス比例弁と、このガス比例弁を制御するための開度信号を出力する制御部と、前記開度信号に応じた駆動電流を前記ガス比例弁に供給するための駆動回路と、前記駆動電流に応じた監視電圧を生成し前記制御部に出力する監視回路とを備えた燃焼装置であって、
前記監視回路は、
前記駆動電流に応じた監視電圧を生成する電圧生成部と、前記電圧生成部で生成される監視電圧を前記制御部の複数の端子の各々に接続された複数の分岐経路を通じて各々の前記端子へ出力する分岐出力部と、を有し、
前記制御部は、
前記複数の端子の各々に入力される前記監視電圧を比較し、前記監視電圧間の最大の電圧差が判定基準値以上である場合に、前記監視回路の故障であると判定する第1の判定処理を行うとともに、前記ガス比例弁を予め定められた状態となるように制御しているときに、前記監視電圧間の最大の電圧差が前記判定基準値未満であり、かつ、少なくとも1つの前記監視電圧が予め定められた正常範囲内ではない場合に、前記監視回路の故障であると判定する第2の判定処理を行うよう構成された、
燃焼装置。 - 前記制御部は、
前記ガス比例弁を閉弁状態となるように制御しているときに、前記正常範囲に第1所定範囲を用いて前記第2の判定処理を行うよう構成された、
請求項1または2に記載の燃焼装置。 - 前記制御部は、
前記燃焼部の点火直前または点火初期において、前記ガス比例弁を予め定められた開度となるように制御しているときに、前記正常範囲に第2所定範囲を用いて前記第2の判定処理を行うよう構成された、
請求項1~3のいずれかに記載の燃焼装置。 - 前記制御部は、
相互に通信可能な複数のマイクロコントローラで構成され、
それぞれの前記端子が異なる前記マイクロコントローラに備えられた、
請求項1~4のいずれかに記載の燃焼装置。
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AU2019219900A AU2019219900B2 (en) | 2018-02-19 | 2019-02-12 | Combustion device |
US16/967,700 US11137168B2 (en) | 2018-02-19 | 2019-02-12 | Combustion device |
CN201980012324.8A CN111699346B (zh) | 2018-02-19 | 2019-02-12 | 燃烧装置 |
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JPH09303769A (ja) * | 1996-05-09 | 1997-11-28 | Gastar Corp | 燃焼装置の比例弁駆動回路 |
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JP2008116154A (ja) * | 2006-11-07 | 2008-05-22 | Matsushita Electric Ind Co Ltd | 熱発生機器の安全装置 |
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JP2018031572A (ja) * | 2016-08-26 | 2018-03-01 | 株式会社ノーリツ | 燃焼機器 |
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DE4421361A1 (de) * | 1994-06-18 | 1995-12-21 | Diehl Gmbh & Co | Gasbeheiztes Gerät |
JP3697757B2 (ja) * | 1995-10-24 | 2005-09-21 | 松下電器産業株式会社 | サーミスタ回路監視装置 |
DE59604283D1 (de) * | 1995-10-25 | 2000-03-02 | Stiebel Eltron Gmbh & Co Kg | Verfahren und Schaltung zur Regelung eines Gasbrenners |
WO1998036219A1 (fr) * | 1997-02-14 | 1998-08-20 | Gastar Co., Ltd. | Appareil de combustion |
WO2006080223A1 (ja) | 2005-01-26 | 2006-08-03 | Noritz Corporation | 燃焼制御装置 |
CA2619506A1 (en) * | 2007-08-28 | 2009-02-28 | Aos Holding Company | Appliance having load monitoring system |
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2018
- 2018-02-19 JP JP2018026750A patent/JP6950564B2/ja active Active
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2019
- 2019-02-12 US US16/967,700 patent/US11137168B2/en active Active
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- 2019-02-12 AU AU2019219900A patent/AU2019219900B2/en active Active
- 2019-02-12 CN CN201980012324.8A patent/CN111699346B/zh active Active
Patent Citations (6)
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JPH09303769A (ja) * | 1996-05-09 | 1997-11-28 | Gastar Corp | 燃焼装置の比例弁駆動回路 |
US20060141409A1 (en) * | 2004-12-23 | 2006-06-29 | Honeywell International Inc. | Automated operation check for standing valve |
JP2008116154A (ja) * | 2006-11-07 | 2008-05-22 | Matsushita Electric Ind Co Ltd | 熱発生機器の安全装置 |
JP2016183807A (ja) * | 2015-03-26 | 2016-10-20 | 株式会社ノーリツ | 燃焼機器 |
JP2017116176A (ja) * | 2015-12-24 | 2017-06-29 | 株式会社ノーリツ | ガス燃焼機器 |
JP2018031572A (ja) * | 2016-08-26 | 2018-03-01 | 株式会社ノーリツ | 燃焼機器 |
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JP2019143840A (ja) | 2019-08-29 |
US20210033308A1 (en) | 2021-02-04 |
US11137168B2 (en) | 2021-10-05 |
AU2019219900B2 (en) | 2023-09-21 |
CN111699346B (zh) | 2022-02-25 |
JP6950564B2 (ja) | 2021-10-13 |
AU2019219900A1 (en) | 2020-08-20 |
CN111699346A (zh) | 2020-09-22 |
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