EP4336101A1 - Dispositif de détection d'un retour d'allumage dans un appareil de chauffage - Google Patents

Dispositif de détection d'un retour d'allumage dans un appareil de chauffage Download PDF

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Publication number
EP4336101A1
EP4336101A1 EP23195350.6A EP23195350A EP4336101A1 EP 4336101 A1 EP4336101 A1 EP 4336101A1 EP 23195350 A EP23195350 A EP 23195350A EP 4336101 A1 EP4336101 A1 EP 4336101A1
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EP
European Patent Office
Prior art keywords
sensor
ignition
value
designed
heater
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP23195350.6A
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German (de)
English (en)
Inventor
Jens Hermann
Markus Weingart
Andreas KERSCHREITER
Andreas Weiss
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ebm Papst Landshut GmbH
Original Assignee
Ebm Papst Landshut GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ebm Papst Landshut GmbH filed Critical Ebm Papst Landshut GmbH
Publication of EP4336101A1 publication Critical patent/EP4336101A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F23D14/82—Preventing flashback or blowback
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/9901—Combustion process using hydrogen, hydrogen peroxide water or brown gas as fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2233/00—Ventilators
    • F23N2233/06—Ventilators at the air intake
    • F23N2233/08—Ventilators at the air intake with variable speed

Definitions

  • the invention relates to a device for detecting a back-ignition in a heater, which is in particular a gas condensing boiler having a fan, and a fan for such a heater.
  • Heating devices and in particular gas condensing boilers are known from the prior art, which can also have a variety of different monitoring and safety devices.
  • gas condensing boilers or gas boilers are usually designed to burn gas-air mixtures of fuel gas and air, which have only a small or no proportion of hydrogen as fuel gas.
  • the proportion of hydrogen in the fuel to be burned should be increased
  • the mixture or the fuel gas can be increased or even 100% hydrogen can be burned as fuel gas by the gas boilers.
  • back-ignition can occur if either the output of the burner of the gas boiler is modulated too far downwards and the flame speed exceeds the flow speed of the gas-air mixture, or in a second case if At the time of ignition there is too much hydrogen or an “ideal oxyhydrogen mixture” in the combustion chamber and the supply paths, in particular a delivery path determined by the fan being attributed to the supply path.
  • the flame pushes into the burner and transfers to the volume of the fan or the conveying path determined by the fan.
  • a pressure wave is created by the expansion of the burning mixture, which also pushes back into the burner and the fan or the delivery path determined by the fan.
  • gas boilers for burning 100% hydrogen are a comparatively new technology in which a safe and reliable exclusion of back-ignition cannot be avoided or only is difficult to do.
  • a back-ignition or a back-ignition leading to a leak has not yet been detected by the known systems and can therefore occur several times until the gas boiler leaks or other damage occurs.
  • the invention is therefore based on the object of overcoming the aforementioned disadvantages and of providing a device with which the safety of heating devices can be further increased, particularly when burning hydrogen.
  • a device for detecting a re-ignition in a heater wherein a particularly gaseous medium is conveyed in the heater along a conveying path for combustion in a combustion chamber.
  • the medium is preferably at least partially and more preferably completely hydrogen.
  • the heater can in particular be a fan have gas condensing boilers or generally have a fan.
  • the gas condensing boiler can also be referred to simply as a gas boiler, with the fan preferably being a premixing fan.
  • the device has at least one sensor for detecting signal or value fluctuations, in particular abrupt or discontinuous value fluctuations, caused by the re-ignition and in particular by the re-ignition on the fan.
  • the device also has an evaluation unit.
  • the evaluation unit is designed to detect the re-ignition by means of a detection or a detection of a particularly predetermined value fluctuation or one that goes beyond a tolerance range, a sensor value detected by the at least one sensor and/or a sensor value curve, that is, in particular a curve of the value detected by the sensor Sensor value over time or a large number of sensor values recorded one after the other with at least one predetermined comparison value and, for example, if a comparison value is exceeded or if there is a deviation from a comparison value that goes beyond a predetermined tolerance, to detect the re-ignition, i.e.
  • a sensor value provided by the at least one sensor or the sensor value curve, ie the sensor signal is checked or evaluated for discontinuities or erratic value fluctuations and in particular value fluctuations that go beyond a tolerance set, for example, by limit values, since such discontinuities / value fluctuations indicate a re-ignition.
  • the at least one comparison value is known or, in particular, can be determined by the evaluation unit for the comparison, that is, for example, can be calculated.
  • the evaluation unit can also be designed to store the presence of a re-ignition and to display and/or report the re-ignition, for example, only when it occurs repeatedly and in particular within a predetermined period of time.
  • the evaluation unit prefferably be designed to display and/or report and/or store the exceedance depending on the comparison and in particular a level or strength of the exceedance determined in the comparison.
  • the basic idea of the invention is therefore to detect value fluctuations, such as acceleration, caused by the re-ignition and in particular by the re-ignition or pressure wave of the re-ignition, preferably in the heater, i.e. for example in the gas boiler and in particular in or on the fan or an electronics of the fan of the heating heater, with the at least one sensor to detect, to evaluate the detected sensor values in the evaluation unit for fluctuations and thereby to detect the re-ignition.
  • a back-ignition can be detected in a simple manner and, if necessary, reacted to, which significantly increases the safety of, for example, a gas condensing boiler operated with hydrogen.
  • the heater can, for example, go into a malfunction (lock-out). A conscious check of the tightness of all components of the heater and especially the fan can then be carried out. The design or setting of the heater can also be checked.
  • the comparison value for a respective sensor can, for example, be a predetermined or predeterminable limit value, in particular stored in the evaluation unit and/or previously determined in the evaluation unit. Furthermore, the comparison value can also be a predetermined limit value curve for a respective sensor, in particular stored in the evaluation unit and/or previously determined in the evaluation unit. Additionally or alternatively, the comparison value for a respective sensor can be a control signal of the heater or a component of the heater that corresponds to the sensor value and/or the sensor value curve. If a variable is detected by the sensor, which at the same time corresponds to a control signal or a control variable of the heater and in particular the gas boiler or its fan, these can be compared with one another.
  • An example of this is a control signal for adjusting the speed of an impeller of the fan, which can be compared with a speed measured by the sensor, in which case the values may then have to be converted or applied with correction factors.
  • the limit value or limit value curve can also be determined from a previous sensor value or the sensor value curve, in order, for example, to detect impermissibly large jumps in the sensor value and to recognize them as re-ignition.
  • the comparison of the sensor value with several comparison values is intended, it may already be sufficient that the sensor value exceeds a comparison value or a part of the comparison values or whose deviations go beyond the respective tolerance.
  • the value fluctuations or acceleration to be detected by the at least one sensor can be present and detected, for example, in the form of deflections, vibrations or sound.
  • different sensors or concepts can be used individually and in combination with one another.
  • the heater has a fan and the at least one sensor is of the type of speed sensor.
  • the sensor or the speed sensor is designed to detect a speed of an impeller of the blower and to provide it as a sensor value for evaluating value fluctuations.
  • a limit value corresponding to a speed can serve as a comparison value.
  • the comparison value can also be an expected speed curve, so that unexpectedly strong speed fluctuations or jumps can be detected.
  • the comparison value can also be determined from a control signal of the fan or its impeller, which corresponds to a speed, such a control signal optionally being subjected to a correction factor or converted into a speed.
  • a sensor designed as a speed sensor is preferably integrated into the fan and is provided, for example, on a motor driving the impeller.
  • such a speed sensor can be designed to detect partial revolutions and in particular half revolutions of the impeller and to determine the speed from this.
  • the at least one sensor can be of the type of a microphone, which is designed to measure airborne sound caused by the re-ignition and to provide it as a sensor value for evaluating value fluctuations.
  • a comparison value for a sensor designed as a microphone can be a simple limit value, which is selected so that sound waves triggered by the re-ignition, i.e. explosions, are reliably detected, but disturbances that occur in the environment during normal operation, such as slamming doors, are not detected.
  • a microphone can be arranged on control electronics or a circuit board of the control electronics of the heater, along a conveying path of the medium, which is conveyed in particular by the fan along the conveying path, or on a housing of the control electronics, the fan or another component of the heater .
  • a microphone If a microphone is present, it or the sensor value recorded with it can also be used in the heater and in particular in the blower to detect bearing damage, whereby the associated evaluation can also take place in the evaluation unit.
  • the at least one sensor is of the type of structure-borne sound sensor.
  • a sensor is designed to measure structure-borne noise caused by the re-ignition on the heater or a component of the heater and in particular on the fan and to provide it as a sensor value for evaluating value fluctuations.
  • the structure-borne noise sensor is preferably integrated into the control electronics of the heater or more preferably of the blower and arranged on a circuit board of the control electronics, although it can alternatively also be arranged on a housing of the blower.
  • the at least one sensor can also be of the type of an acceleration sensor and in particular a 3-axis acceleration sensor.
  • the acceleration sensor is designed to detect the re-ignition, to measure an acceleration caused by the re-ignition on the heater or on a component of the heater, such as the fan, and to provide it as a sensor value for evaluation of value fluctuations.
  • the at least one sensor can be of the type of gyroscope, which is designed to measure a movement caused by the re-ignition on the heater or its components and to provide it as a sensor value for evaluating value fluctuations.
  • An acceleration sensor and a gyroscope can also be integrated into the control electronics of the heater or its fan and, in particular, be arranged on a circuit board of the control electronics.
  • the at least one sensor is of the type of pressure sensor, which is designed to measure a pressure change caused by the re-ignition, in particular in the surroundings of the blower and preferably along the conveying path formed by the blower, and to provide it as a sensor value Provide evaluation for fluctuations in value.
  • the pressure sensor can in particular be an absolute pressure sensor or a relative pressure sensor.
  • the limit value can be, for example, 1000 Pa or above this value, so that essentially only explosions, i.e. re-ignitions, are detected, since other events and in particular pressures that occur during normal, i.e. intended, operation are significantly below this limit value.
  • the sensor value can also be used to determine the air pressure, the air density and/or the installation height of the blower or gas boiler to control the blower or gas boiler.
  • the at least one sensor can be of the predetermined breaking point type according to a further embodiment.
  • the target breaking point is designed to detect a break caused by the re-ignition and to provide it as a sensor value for evaluating value fluctuations.
  • a voltage can be present at the evaluation unit via an electrical line leading over the predetermined breaking point. If there is a break at the predetermined breaking point, the line is interrupted so that there is no longer any voltage on the evaluation unit and this detects the break in the predetermined breaking point or the re-ignition.
  • the desired breaking point is preferably designed to break in the event of a re-ignition or in the event of a value fluctuation caused by the re-ignition, in particular an acceleration of a predetermined strength caused by the re-ignition.
  • the predetermined breaking point is provided, for example, in or on the heater and in particular on the blower and preferably in the control electronics of the blower. However, the predetermined breaking point could also be arranged on a unit provided for this purpose in the conveying path.
  • the at least one sensor can also be of the type of temperature sensor, which is designed to measure a change in temperature of a medium flowing along the conveying path caused by the re-ignition and to provide it as a sensor value for evaluating value fluctuations.
  • the medium is correspondingly accelerated and the temperature of the medium, starting from the re-ignition, is greatly increased along the conveying path, which is detected by the sensor and provided as a sensor value for evaluation of value fluctuations.
  • a temperature sensor especially if it detects the temperature of air flowing into the heater and in particular into the gas boiler, can also be used to compensate for high or low air temperatures when controlling the fan or the gas boiler.
  • the at least one sensor can be of the type of mass flow sensor, which is designed to measure a value or mass flow fluctuation caused by the re-ignition, i.e. acceleration of the mass flow of the medium flowing along the conveying path, and to provide it as a sensor value for evaluation of value fluctuations.
  • a mass flow sensor can in particular be arranged in a supply air path of the heater or the fan, along which air flows into a mixing device or mixer of the heater, in which fuel gas and air are mixed to form the gas-air mixture.
  • the at least one sensor can also be of the type of concentration sensor, which is designed to measure a concentration fluctuation caused by the re-ignition, in particular in the medium flowing along the conveying path, and to provide it as a sensor value for evaluating value fluctuations.
  • the concentration sensor does not necessarily have to be provided in the conveying path and can, for example, also detect the concentration of the fuel gas in an environment of the device or the heater. If the concentration sensor is designed to detect the concentration of the fuel gas in the environment, a leak is also detected.
  • the fuel gas concentration ie a concentration of hydrogen
  • the re-ignition causing an acceleration of the medium starting from the re-ignition, which can be detected by a particularly sudden fluctuation in value or concentration.
  • the density of the gas and/or installation height of the blower or gas boiler can be determined using this and, if necessary, other values necessary in addition to the concentration and can be used to control the blower or gas boiler.
  • the device can only have a single sensor for detecting value fluctuations caused by the re-ignition to detect the re-ignition.
  • the device can also have a large number of sensors, i.e. at least two sensors.
  • the sensors can be sensors of a single type. Alternatively, however, it is also possible that these sensors are of different types. For example, one or more sensors of a first type and one or more sensors of a second or further type can be provided.
  • the re-ignition can in particular be reported to a higher-level system, such as the control electronics of the heater or the fan.
  • a bus system such as this can be used for such a message CAN or LIN bus, a digital error output or a signal LED can be used.
  • the message can also be sent to a higher-level remote maintenance system.
  • the heater or the fan can then, for example, switch off, switch to a safe operating mode and/or block the restart.
  • the sensor values and settings of the heater or gas boiler or fan recorded at the time of re-ignition can be stored in the evaluation unit or sent together with the message in order to enable analyses.
  • Another aspect of the invention also relates to a fan for a heater and in particular for a gas condensing boiler with a device according to the invention.
  • the blower forms at least a section of the conveying path for conveying the medium and is also designed to convey the medium along the conveying path with a mass flow.
  • the blower also has control electronics for controlling the blower.
  • the medium is in particular air and fuel gas, which are mixed in a mixing device or a mixer along the conveying path to form a gas-air mixture.
  • an advantageous variant here provides that the evaluation unit and/or the at least one sensor for detecting value fluctuations caused by the re-ignition is integrated into the control electronics of the blower.
  • the control electronics has a circuit board on which the evaluation electronics and/or the sensor for detecting value fluctuations caused by the re-ignition are also integrated.
  • the fan can also have a sensor to control the mass flow ie for controlling the intended function, one of the sensors or the one sensor for detecting value fluctuations caused by the re-ignition being the sensor for controlling the mass flow.
  • the blower already has a speed sensor for controlling the speed of the impeller and/or a mass flow sensor for detecting the mass flow of the medium.
  • sensors can then also be used for the detection of the re-ignition, in which case a further sensor can then preferably be provided for detecting accelerations caused by the re-ignition in order to increase the detection reliability.
  • the device can additionally or alternatively be integrated into other components of the heater.
  • a further aspect of the invention relates to a fuel gas valve for a heater designed in particular as a gas condensing boiler, into which a device according to the invention is integrated.
  • the fuel gas valve forms at least a section of the conveying path for conveying the medium.
  • the fuel gas valve also has control electronics for controlling the fuel gas valve.
  • the at least one sensor can, for example, be integrated into the control electronics of the fuel gas valve or a housing of the control electronics of the fuel gas valve or be arranged along the delivery path within the fuel gas valve.
  • sensors already present on the fuel gas valve such as a mass flow or concentration sensor for controlling the fuel gas valve, can also be used to detect the re-ignition
  • aspects of the invention relate to a heater and in particular a gas condensing boiler with a fan according to the invention and/or with a device according to the invention.
  • a heater has as components a fan, a mixer, a fuel gas line leading from a fuel gas supply line to the mixer and an air supply line leading from an air supply line to the mixer.
  • a heater has as components a fuel gas valve arranged in the fuel gas line, a burner in a combustion chamber arranged fluidically downstream of the blower, and an exhaust gas line arranged fluidically downstream of the burner.
  • the at least one sensor for detecting value fluctuations caused by the re-ignition can be arranged in each of the components. If several sensors are provided, they can be arranged in one of the components or distributed across several components.
  • the evaluation unit and/or the at least one sensor for detecting value fluctuations caused by the re-ignition can be integrated into the control electronics of the respective component.
  • sensors can be connected for signaling purposes to a common evaluation unit, which in turn can be integrated into the control electronics of one of the components.
  • the components have sensors for controlling the components or the intended use of the heater and these sensors are also the sensors for detecting fluctuations in the value of the device caused by the re-ignition.
  • FIG. 1 A heater 1 designed as a gas boiler with a device according to the invention or a blower 13 according to the invention is shown in simplified form.
  • Fuel gas flows through a fuel gas inlet along the fuel gas supply line 2 into the mixer 12, which is fluidically connected upstream of the blower 13, in which the fuel gas is mixed with air flowing in through the air supply line 3 to form the gas-air mixture.
  • the fuel gas flows through the fuel gas valve 11, through which the fuel gas supply can be regulated.
  • the blower 13 sucks in fuel gas and air through the respective supply line 2, 3 and blows the mixture created in the mixer 12 along the conveying path 14 into the burner 15, which is arranged in a combustion chamber 16 of the heater 1.
  • the path from the fuel gas supply line 2 and/or the air supply line 3 into the mixer 12 or into the blower 13 can be assigned to the conveying path 14.
  • the mixture flowing out of the burner 15 can be ignited by the ignition electrode 17, so that flames 4 arise and the mixture flows out of the burner 15 or is burned in the combustion chamber 16.
  • a speed sensor 21 is also provided on the blower 13 or a motor of the blower 13 driving the impeller, through which the speed of the impeller can be detected .
  • the fan 13 has control electronics 20 on which the speed sensor 21 is arranged or to which the speed sensor 21 is connected.
  • the speed sensor 21 also forms a sensor 21 for detecting accelerations of the impeller caused by the re-ignition, i.e. a fluctuation in the speed of the impeller.
  • a further sensor 22 is provided for detecting value fluctuations caused by the re-ignition (here specifically accelerations), which in the example shown is designed as an acceleration sensor 22.
  • the two sensors 21, 22 for detecting value fluctuations caused by the re-ignition are connected to an evaluation unit 23, which enables signal exchange, which is also integrated into the control electronics 20 of the blower.
  • the evaluation unit 23 is designed to evaluate the respective sensor values detected by the two sensors 21, 22 in order to detect the re-ignition, i.e. to compare them with at least one comparison value.
  • the resulting pressure wave from the re-ignition affects the impeller and the housing of the blower 13 and stimulates them or the structure of the blower 13, the motor driving the impeller and the control electronics 20 or its circuit board mechanically.
  • This excitation or acceleration can be detected by the speed sensor 21 in the form of a speed fluctuation and by the acceleration sensor 22 in the form of an acceleration or in the form of a jerk of the control electronics 20.
  • the speed sensor 21 in the form of a speed fluctuation
  • the acceleration sensor 22 in the form of an acceleration or in the form of a jerk of the control electronics 20.
  • there is a bang i.e. a sound event, which could be detected by a sensor designed as a microphone to detect (sound) accelerations caused by the re-ignition.
  • Such a stimulus and in particular through repeated stimuli can lead to a leak and an escape of fuel gas in the heater 1 and, for example, at a seal 18, which should be prevented or at least detected.
  • the movement caused by the re-ignition on the fan 13 is correspondingly detected by the two sensors 21, 22 present and forwarded to the evaluation electronics 23 in the form of respective sensor values.
  • the evaluation electronics 23 compares the speed curve recorded by the speed sensor 21 with a target speed curve or evaluates the speed curve in order to detect a jump in speed and detects a deviation and a corresponding potential re-ignition.
  • the acceleration detected by the acceleration sensor 22 is compared with a predetermined limit value, which is selected so that accelerations or value fluctuations acting on the control electronics 20 during normal operation are below the limit value. If the acceleration detected by the acceleration sensor 22 exceeds the limit value, a potential re-ignition is also detected. There are therefore two indicators indicating a re-ignition, so that a re-ignition is assumed or detected.
  • This re-ignition is then reported via an error output, for example, so that appropriate measures can be taken.
  • the gas boiler 1 can be switched off and locked, so that operation of the gas boiler 1 is not possible until it is released and, for example, no fuel gas can escape from the seal 18.
  • the re-ignition can also be saved first, so that the locking or further measures can only be initiated if the re-ignition occurs multiple times, for example two or three times.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Regulation And Control Of Combustion (AREA)
EP23195350.6A 2022-09-09 2023-09-05 Dispositif de détection d'un retour d'allumage dans un appareil de chauffage Withdrawn EP4336101A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102022122935.1A DE102022122935A1 (de) 2022-09-09 2022-09-09 Vorrichtung zur Detektion einer Rückzündung in einem Heizgerät

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EP4336101A1 true EP4336101A1 (fr) 2024-03-13

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DE (1) DE102022122935A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080251035A1 (en) * 2007-04-12 2008-10-16 Rheem Manufacturing Company Burner Flashback Detection and System Shutdown Apparatus
US20160153656A1 (en) * 2013-12-27 2016-06-02 Mitsubishi Heavy Industries, Ltd. Combustion control device, combustion system, combustion control method and program
EP3919817A1 (fr) * 2020-05-26 2021-12-08 Vaillant GmbH Procédé et dispositif de détection des défaillances lors de l'allumage d'un brûleur doté d'un ventilateur destiné à l'alimentation en air et d'une soupape à combustible
US20220120440A1 (en) * 2019-03-28 2022-04-21 Bdr Thermea Group B.V. Method for operating a premix gas burner, a premix gas burner and a boiler
EP4043793A1 (fr) * 2021-02-05 2022-08-17 Vaillant GmbH Procédé et agencement de détection d'un retour de flamme dans un brûleur à prémelange

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009005125A1 (de) 2009-01-19 2010-07-22 Enerday Gmbh Vorrichtung und Verfahren zum Bestimmen eines Betriebszustandes eines Brenners mittels Körperschallmessung
DE102021103935A1 (de) 2021-02-19 2022-08-25 Vaillant Gmbh Verfahren und Anordnung zur Vermeidung eines Flammenrückschlages in einen Vormisch-Brenner

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080251035A1 (en) * 2007-04-12 2008-10-16 Rheem Manufacturing Company Burner Flashback Detection and System Shutdown Apparatus
US20160153656A1 (en) * 2013-12-27 2016-06-02 Mitsubishi Heavy Industries, Ltd. Combustion control device, combustion system, combustion control method and program
US20220120440A1 (en) * 2019-03-28 2022-04-21 Bdr Thermea Group B.V. Method for operating a premix gas burner, a premix gas burner and a boiler
EP3919817A1 (fr) * 2020-05-26 2021-12-08 Vaillant GmbH Procédé et dispositif de détection des défaillances lors de l'allumage d'un brûleur doté d'un ventilateur destiné à l'alimentation en air et d'une soupape à combustible
EP4043793A1 (fr) * 2021-02-05 2022-08-17 Vaillant GmbH Procédé et agencement de détection d'un retour de flamme dans un brûleur à prémelange

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