EP4174375A1 - Procédé de validation d'un signal d'un dispositif de surveillance de flamme d'un appareil de chauffage, programme informatique, support de stockage, appareil de commande et utilisation d'un capteur de température - Google Patents

Procédé de validation d'un signal d'un dispositif de surveillance de flamme d'un appareil de chauffage, programme informatique, support de stockage, appareil de commande et utilisation d'un capteur de température Download PDF

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Publication number
EP4174375A1
EP4174375A1 EP22201950.7A EP22201950A EP4174375A1 EP 4174375 A1 EP4174375 A1 EP 4174375A1 EP 22201950 A EP22201950 A EP 22201950A EP 4174375 A1 EP4174375 A1 EP 4174375A1
Authority
EP
European Patent Office
Prior art keywords
heater
flame
temperature
flame monitoring
parameter
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.)
Granted
Application number
EP22201950.7A
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German (de)
English (en)
Other versions
EP4174375B1 (fr
EP4174375C0 (fr
Inventor
Jochen Grabe
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.)
Vaillant GmbH
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Vaillant GmbH
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Filing date
Publication date
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Publication of EP4174375A1 publication Critical patent/EP4174375A1/fr
Application granted granted Critical
Publication of EP4174375B1 publication Critical patent/EP4174375B1/fr
Publication of EP4174375C0 publication Critical patent/EP4174375C0/fr
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Anticipated expiration legal-status Critical

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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
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/08—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements
    • F23N5/082—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/10—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples
    • F23N5/102—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/12—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods
    • F23N5/123—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods using electronic means
    • 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

Definitions

  • the invention relates to a method for validating a signal from a device for flame monitoring of a heating device, a computer program, a storage medium, a regulating and control unit, a heating device and the use of a temperature sensor.
  • Gas-fired heaters often have a flame detection device that prevents unburned combustible gas/air mixture from escaping in the combustion chamber of the heater. Flame detection enables the gas supply to the heater to be interrupted as soon as the flame detection device can no longer detect a flame, thus enabling the heater to be operated particularly safely.
  • Flame detection based on a measured ionization current of the flame of the heater is often used in heaters set up for the combustion of hydrocarbons.
  • the charge carriers released during combustion are determined. This method enables safe and reliable flame detection.
  • flame detection based on UV light can be used in hydrogen fueled heaters, with an ultraviolet light sensor aimed at the flame.
  • an ultraviolet light sensor aimed at the flame.
  • flame detection cannot be reliably guaranteed, which would mean that the operation of the heater would have to be interrupted.
  • a fault in a flame monitoring sensor and/or the evaluation electronics can be detected at the latest when a heater is started up, so that appropriate measures can then be initiated, such as e.g. B: taking the heater out of service or putting it into a failure mode.
  • the invention should at least not significantly increase the complexity of a heating device and/or require only minor structural changes to a known heating device and/or enable simple integration into existing heating devices.
  • Steps a), b) and c) are carried out at least once in the specified sequence in a regular process sequence.
  • steps a) and b) are carried out continuously or at regular time intervals during operation of the heater.
  • the method serves in particular to validate the signal of a first or primary (usually used) device for flame monitoring of a burner of a heating device and thus in particular to monitor the function of this first device for flame monitoring.
  • the first device for flame monitoring can be of any type, but in particular includes a UV sensor (sensor for detecting ultraviolet radiation from a flame) of the heater.
  • the heater is, in particular, a gas heater that is set up to burn a gaseous fuel, such as natural gas or, in particular, hydrogen, with the supply of ambient air, in order to generate heat that is provided, for example, to a heating circuit and/or a hot water supply can.
  • the heater generally has at least one burner and a delivery device (such as a fan) which delivers a mixture of (preferably gaseous) fuel and combustion air through a mixture channel of the heater to the burner; then the exhaust gas produced by the combustion can be routed through an exhaust pipe of the heater to an exhaust system.
  • the heater has at least one flame monitoring device. The flame monitoring device can be used to detect the presence of a flame and also to regulate the combustion process.
  • the second or further device for flame monitoring can be, for example, a device for measuring an ionization current of the flame of the heater, the conductivity of the flame being measured, which varies with the amount of charge carriers released during combustion.
  • the combustion process in particular the mixing ratio of combustion air and fuel gas, can also be controlled using a measured ionization current.
  • the flame has a significantly lower level of ionization, at least when the heater is running at low power, which makes it difficult to monitor the flame by measuring the ionization current. Therefore, alternative methods can be used here, such as detecting the ultraviolet (UV) radiation emitted by the flame.
  • a UV sensor can be directed towards the flame inside or outside the combustion chamber.
  • the reference value is generally given in the dimensions of the parameter recorded in step a) and characterizes a threshold which, if it is reached, fallen below or exceeded, it can be assumed that the flame will go out.
  • the reference value can be a discrete value, for example, which is stored in a data memory.
  • a (selected) parameter of the heating device is detected, which allows a (preferably direct) conclusion to be drawn about a flame temperature.
  • the parameter can be a temperature or a temperature difference.
  • the parameter to be recorded in step a) can be a temperature to be recorded in the combustion chamber and/or in the immediate vicinity of the combustion chamber.
  • the detection can take place in particular by means of a temperature sensor.
  • a temperature can be detected by a temperature sensor which is arranged in the combustion chamber, the temperature sensor being as far away from the flame as possible.
  • the temperature sensor should not be exposed to excessively high temperatures, so that the service life should be increased. It goes without saying that the reference value should be adapted to the position of the temperature sensor and the corresponding temperature range.
  • the response time of the validation proposed here can be particularly advantageous for the response time of the validation proposed here to arrange the temperature sensor for carrying out step a) in the combustion chamber of the heater (as far away as possible from the flame), but in a position where it is directly exposed to the thermal radiation of the flame is. In this way, a time delay in the detection of a loss of flame due to the thermal mass of possible components arranged between the flame and the temperature sensor can be prevented in an advantageous manner.
  • a flow temperature of a heating circuit connected to the heater can be detected.
  • the flow temperature is regularly recorded in heaters anyway, and a method designed in this way can be retrofitted to existing heaters in a particularly simple manner.
  • a difference between the flow and return temperature can be detected as a parameter in step a). In this way, the influence of an ambient temperature can advantageously be reduced.
  • the parameter recorded in step a) is compared with a (specified) reference range.
  • the reference range can also be defined using a specific reference value. If the reference range is defined by a reference value, this can be regarded as a limit value that decides whether a value of the parameter lying above or below is within or outside the reference range.
  • the reference range or the reference value is in particular a temperature range or a temperature and/or a temperature difference range or a temperature difference.
  • the reference range or the reference value defines in particular an operating state of the heater in which the regular operation of the heater with very high It is safe to assume that the flame has gone out. The evaluation of the temperature difference between the flow and return allows conclusions to be drawn about the heat energy supplied, in particular depending on the operating status of the heater.
  • the reference range or the reference value can be determined using operating data of the heater.
  • the reference range or reference value can be determined once or online, ie it can be adjusted permanently or regularly based on the operating data.
  • the operating data to be included can be selected from the following group, for example: an output of the heating device, a flow and/or return temperature, a mass flow of fuel gas and an output of the delivery device.
  • a number of parameters can also be recorded in step a), which allow a (direct) conclusion to be drawn about a flame temperature of the heating device.
  • several reference ranges or reference values should be specified, which are to be assigned to the corresponding recorded parameters.
  • step c) if the comparison in step b) shows that the value of the parameter lies outside the reference range or falls below a reference value, the heater can be operated with a second device for flame monitoring of the heater . If the heater does not have a second device for flame monitoring, the heater can also be shut down as an alternative.
  • the second device for flame monitoring can be of the same or different type or measuring method than the first device for flame monitoring.
  • the heater can be operated with a second device for flame monitoring according to step c) can also be monitored by carrying out steps a) and b).
  • one or more reference ranges or values can be specified for the second device for flame monitoring.
  • the heater can also be shut down in step c).
  • a gas supply of the heater can be closed to increase safety.
  • the heater can advantageously be put into a mode that prevents it from being put into operation by a user and only allows it to be put into operation by a person skilled in the art.
  • the heater in step d) can provide information about the value of the parameter deviating from a reference range or falling below/exceeding the reference value and/or a change in the device for flame monitoring (result of step c)). or ship.
  • the information can be provided or sent via a network, in particular the Internet.
  • the heater can automatically send information about this to a selected specialist company, which can then plan and carry out a maintenance appointment for the heater to restore the first flame detection device.
  • a computer program is also proposed which is set up to (at least partially) carry out a method presented here.
  • this relates in particular to a computer program (product) comprising instructions which, when the program is executed by a computer, cause the latter to execute a method proposed here.
  • a machine-readable storage medium is also proposed, on which the computer program is stored.
  • the machine-readable storage medium is usually a computer-readable data carrier.
  • a regulating and control unit for a heating device is also proposed, set up to carry out a method proposed here.
  • the regulating and control device can have a processor, for example, and/or have it at its disposal.
  • the processor can, for example, execute the method stored in a memory (of the regulation and control device).
  • data such as one or more reference ranges or reference values for carrying out a method presented here can also be stored in the memory of the regulation and control unit.
  • a heater having a regulation and control device proposed here.
  • the heater is in particular a gas heater, in particular a hydrogen-powered gas heater.
  • the gas heater can have a burner and a delivery device with which a mixture of combustion gas (hydrogen) and combustion air can be supplied to the burner.
  • a temperature of a heating device detected in or in the immediate vicinity of a combustion chamber of a heating device to validate a signal from a device for flame monitoring of the heating device.
  • a method, a computer program, a storage medium, a regulation and control device, a heating device and a use are thus specified here, which at least partially solve the problems described with reference to the prior art.
  • the method, the computer program, the storage medium, the regulation and control unit, the heater and the use at least contribute to improving the operational safety of a heater by providing a way of validating a detected signal from a flame monitoring device.
  • the invention can be carried out or implemented in a particularly simple and cost-effective manner and, in particular, can also be retrofitted to existing heating devices.
  • first primarily (only) serve to distinguish between several similar objects, sizes or processes, i.e. in particular no dependency and/or sequence of these objects, sizes or make processes mandatory for each other. Should a dependency and/or order be necessary, this is explicitly stated here or it is obvious to the person skilled in the art when studying the specifically described embodiment. If a component can occur more than once (“at least one"), the description of one of these components can apply equally to all or part of the majority of these components, but this is not mandatory.
  • FIG. 1 shows an exemplary and schematic sequence of a method proposed here.
  • the method is used to validate a device for flame monitoring of a heater 1, such as a UV sensor 12 or an ionization electrode 13.
  • the sequence of steps a), b) and c) shown in blocks 110, 120 and 130 can be in a regular Set operation. In particular, however, carrying out steps a) and b) at the same time (permanently) or regularly at different times may appear sensible.
  • a parameter is detected which enables the flame temperature of the heater 1 to be inferred.
  • a temperature can be detected for this purpose by means of a temperature sensor 10 arranged in a combustion chamber 8 of the heating device 1 .
  • step b) the parameter detected in step a) is compared with an assigned or determined limit value (as a reference range or reference value).
  • step c) the heater 1 is operated with a second device for flame monitoring, for example the UV sensor 12 or the ionization electrode 13 (depending on which was previously active) or the heater is switched off if the detected in step a).
  • parameter is e.g. smaller than the reference value.
  • the heater 1 can have a supply of combustion air 4 to which combustion gas can be added via a gas valve 5 .
  • the resulting combustion mixture can be fed to a burner 3 arranged in a combustion chamber 8 via a mixture channel 16 in which a conveying device 2 can be arranged.
  • Combustion products that arise can be discharged from the combustion chamber 8 via an exhaust system 9 .
  • the combustion chamber 8 can have a (condensate) outlet 14 which can include a siphon 15 .
  • the heater 1 can also have a regulation and control device 7 that can be electrically connected to the temperature sensor 10 in the combustion chamber 8 below the burner 3 .
  • the arrangement of the temperature sensor 10 below the burner 3 in the combustion chamber 8 can advantageously ensure that it is not exposed to excessively high temperatures.
  • the regulating and control device 7 can also be electrically connected to the gas valve 5 , the delivery device 2 and an ignition device 6 .
  • a method proposed here can advantageously be carried out on the regulating and control device 7 .
  • the heater 1 can be connected to a heating circuit 18, having a flow 19 and a return 20, in which a heat carrier can circulate in a circulation direction 21.
  • the heating circuit 18 can have a circulating pump, not shown here and supply consumers not shown here with heat.
  • the temperature in the flow 19 or the difference between the temperatures in the flow 19 and the return 20 can also be used as parameters to be recorded in step a).
  • Combustion mixture can be fed to the burner 3 via the mixture channel 16 and burned with the formation of a flame 11 .
  • the flame 11 can be monitored by a UV sensor 12 or the ionization electrode 13.
  • the temperature sensor 10 can be arranged below the ionization electrode 13 .
  • UV sensor 12, burner 3, ionization electrode 13 and temperature sensor 10 can be arranged in a burner door 17, as a result of which electrical wiring to the regulation and control unit 7 can advantageously be simplified.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Combustion (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
EP22201950.7A 2021-10-27 2022-10-17 Procédé de validation d'un signal d'un dispositif de surveillance de flamme d'un appareil de chauffage, programme informatique, support de stockage, appareil de commande et utilisation d'un capteur de température Active EP4174375B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021127921.6A DE102021127921A1 (de) 2021-10-27 2021-10-27 Verfahren zur Validierung eines Signals einer Einrichtung zur Flammenüberwachung eines Heizgerätes, Computerprogramm, Speichermedium, Regel- und Steuergerät, Heizgerät und Verwendung eines Temperatursensors

Publications (3)

Publication Number Publication Date
EP4174375A1 true EP4174375A1 (fr) 2023-05-03
EP4174375B1 EP4174375B1 (fr) 2025-05-14
EP4174375C0 EP4174375C0 (fr) 2025-05-14

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EP22201950.7A Active EP4174375B1 (fr) 2021-10-27 2022-10-17 Procédé de validation d'un signal d'un dispositif de surveillance de flamme d'un appareil de chauffage, programme informatique, support de stockage, appareil de commande et utilisation d'un capteur de température

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EP (1) EP4174375B1 (fr)
DE (1) DE102021127921A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102023112260A1 (de) * 2023-05-10 2024-11-14 Vaillant Gmbh Verfahren zum Betreiben eines Heizgerätes, Computerprogramm, Regel- und Steuergerät und Heizgerät

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0331918A2 (fr) * 1988-03-07 1989-09-13 Webasto AG Fahrzeugtechnik Méthode pour actionner un dispositif de chauffage et dispositif de chauffage
DE102012220526B3 (de) * 2012-10-18 2014-01-23 Eberspächer Climate Control Systems GmbH & Co. KG Verfahren zur Flammabbrucherkennung bei einem brennstoffbetriebenen Heizgerät, insbesondere Fahrzeugheizgerät
DE102019119186A1 (de) * 2019-01-29 2020-07-30 Vaillant Gmbh Verfahren und Vorrichtung zur Regelung eines Brenngas-Luft-Gemisches in einem Heizgerät

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3839535A1 (de) 1988-11-23 1990-05-31 Eberspaecher J Heizgeraet fuer ein kraftfahrzeug
AT396028B (de) 1990-04-17 1993-05-25 Vaillant Gmbh Verfahren zur regelung eines voll vormischenden flaechenbrenners
EP3663648B1 (fr) * 2018-12-05 2022-08-31 Vaillant GmbH Dispositif de régulation du rapport de mélange de l'air de combustion et de gaz de combustion dans un processus de combustion
DE102021121027A1 (de) * 2021-08-12 2023-02-16 Vaillant Gmbh Verfahren und Anordnung zum sicheren Betreiben und Regeln eines Verbrennungsprozesses in einem Heizgerät für die Verbrennung von Wasserstoff

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0331918A2 (fr) * 1988-03-07 1989-09-13 Webasto AG Fahrzeugtechnik Méthode pour actionner un dispositif de chauffage et dispositif de chauffage
DE102012220526B3 (de) * 2012-10-18 2014-01-23 Eberspächer Climate Control Systems GmbH & Co. KG Verfahren zur Flammabbrucherkennung bei einem brennstoffbetriebenen Heizgerät, insbesondere Fahrzeugheizgerät
DE102019119186A1 (de) * 2019-01-29 2020-07-30 Vaillant Gmbh Verfahren und Vorrichtung zur Regelung eines Brenngas-Luft-Gemisches in einem Heizgerät

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102023112260A1 (de) * 2023-05-10 2024-11-14 Vaillant Gmbh Verfahren zum Betreiben eines Heizgerätes, Computerprogramm, Regel- und Steuergerät und Heizgerät

Also Published As

Publication number Publication date
EP4174375B1 (fr) 2025-05-14
DE102021127921A1 (de) 2023-04-27
EP4174375C0 (fr) 2025-05-14

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