EP4367443A1 - Procédé de mise en marche d'un dispositif brûleur et dispositif de chauffage doté d'un dispositif brûleur - Google Patents

Procédé de mise en marche d'un dispositif brûleur et dispositif de chauffage doté d'un dispositif brûleur

Info

Publication number
EP4367443A1
EP4367443A1 EP22716850.7A EP22716850A EP4367443A1 EP 4367443 A1 EP4367443 A1 EP 4367443A1 EP 22716850 A EP22716850 A EP 22716850A EP 4367443 A1 EP4367443 A1 EP 4367443A1
Authority
EP
European Patent Office
Prior art keywords
burner device
glow plug
combustion air
target value
heating
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
EP22716850.7A
Other languages
German (de)
English (en)
Other versions
EP4367443B1 (fr
Inventor
Christian Bauer
Jörgen van KOPPEN
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.)
Truma Geraetetechnik GmbH and Co KG
Original Assignee
Truma Geraetetechnik GmbH and Co KG
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 Truma Geraetetechnik GmbH and Co KG filed Critical Truma Geraetetechnik GmbH and Co KG
Publication of EP4367443A1 publication Critical patent/EP4367443A1/fr
Application granted granted Critical
Publication of EP4367443B1 publication Critical patent/EP4367443B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F23N5/022—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium 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
    • F23N5/24—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
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • F23N2225/14—Ambient temperature around burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • F23N2225/20—Measuring temperature entrant temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/02—Starting or ignition cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/04—Prepurge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/42—Ceramic glow ignition

Definitions

  • the present invention relates to a method for starting a burner device.
  • Wei terhin the invention relates to a heating device with a burner device that is started with the method.
  • thermal energy is introduced by an electrically controlled ignition element - the so-called glow plug.
  • a glow plug converts electrical energy into thermal energy through its ohmic internal resistance. Temperatures of over 1000 °C occur on the surface of the usually ceramic components. DE 10 2004 062 831 A1 or DE 19924 329 A1, for example, deal with starting burner devices in heaters.
  • the object underlying the invention is to propose a method for starting a burner device that is as ecological as possible. Furthermore, the invention relates to a heating device with a burner device which is started accordingly.
  • the invention solves the problem by a method for starting a burner device, wherein a mixture of combustion air and a fuel is burned in the burner device, wherein a combustion process of the burner device is started by a glow plug, and the method has at least the following steps: that a Temperature of the combustion air is measured, and that a target value of the heating energy of the glow plug is specified as a function of the measured temperature.
  • the goal that the combustion process can be started at any outside temperature is achieved by setting the electrical energy that is fed to the glow plug to the lowest temperature values.
  • the invention is based on the knowledge that at higher temperatures ge can work with less heating energy. This means that electrical energy can be saved in cases where the outside temperatures are higher.
  • the glow plug is less stressed as a result.
  • the starting process is less stressed at warmer starting temperatures.
  • CONFIRMATION COPY shortened.
  • the setpoint values for the heating energy, which are dependent on the temperature, are determined, for example, based on measurements on the burner device or on the respective type of burner device.
  • the electrical output of the glow plug is set in addition to the heating energy according to a specified target value.
  • the method also includes the following step: the heating energy of the glow element is increased until the setpoint value of the heating energy is exceeded. Alternatively, only the target value is reached and no further increase is made.
  • One embodiment includes that the method further comprises the steps: that a scaled target value of the heating energy is specified as a function of the measured temperature, the scaled target value being smaller than the target value, and that in the event that the scaled target value of the heating energy of the glow plug is reached, the combustion air is conveyed into the burner device.
  • the scaled target value is between 50% and 100% of the target value.
  • the combustion air is conveyed into the combustion device earlier, before the desired value of the glow plug has been reached.
  • the scaled target value depends on the properties of the combustion air fan and in particular on the time that the fan needs to reach a target speed.
  • the method also includes the following step: that in the event that the target value of the heating energy of the glow plug is reached, the fuel is conveyed into the burner device. At the moment when a desired temperature has been generated by the glow plug, the fuel is promoted in this embodiment in order to evaporate with the help of the glow plug. If this embodiment is combined with the previous one, combustion air is supplied first and then fuel. This ensures that combustion air is available for combustion.
  • An embodiment includes that the method further comprises steps: that is monitored in the burner device, whether a flame is present, that a delay time is specified, and that after a point in time at which the presence of a flame has been determined, the glow plug during the delay time is operated.
  • the glow plug remains active for a certain time even after the flame has been detected, so that reliable combustion is established and not, e.g. B. the flame goes out again because sufficiently stable combustion conditions have not yet developed.
  • the delay time is specified as a function of the measured temperature. The delay time is longer at lower temperatures and shorter at higher temperatures. This has the advantage that the flame is prevented from going out at lower temperatures. At higher temperatures, it is avoided that thermoacoustic effects are caused by the glow plug.
  • the method also includes the following steps: that at the start of the start-up, the glow plug is switched on and operated at a rated output, and that at the start of the start-up a path through which the combustion air passes in the burner device is flushed with combustion air.
  • the area in which the combustion takes place ie z. B. flushed a combustion chamber with combustion air, so that any remaining residues of flue gas or unburned fuel-air mixture are safely carried out.
  • a temperature sensor which measures the temperature of the supplied air, is also completely surrounded by this fresh air and not by air from the system of the burner device (thus, for example, a heating device).
  • An embodiment of the method as an extension of the previous embodiment includes that the temperature of the combustion air is measured after the path has been flushed.
  • the combustion air must be measured in order to determine the target value for the heating output.
  • the measurement takes place after flushing, i.e. after the generation of a well-defined basic state for the burner device.
  • the method also includes the following steps: that a stabilization time is specified, and that regulation of the burner device is only started after the stabilization time has elapsed after the glow plug has been switched off.
  • the burner device is controlled, for example, as a function of a predetermined temperature of the water to be heated or of the space to be heated. In this embodiment, this regulation takes place only after a certain time has elapsed, within which the combustion process has stabilized.
  • the invention relates to a heating device for heating air and/or for heating a liquid, with a burner device that generates thermal energy by burning a fuel-air mixture, with a heat exchanger that uses the thermal energy generated by the burner device transfers air and/or the liquid, and with a control device, wherein the burner device has a glow plug, a combustion air fan, a fuel pump and a temperature sensor for measuring the temperature of the combustion air, and wherein the control device is designed in such a way that it uses the method according to one of the performs the aforementioned or the following configurations.
  • One embodiment of the heating device provides that the burner device also has a sensor for detecting a flame in the burner device.
  • Fig. 2 is a schematic representation of the burner device
  • Fig. 3 is a schematic representation of the sequence of the starting process of the burner device.
  • a heating device is shown very schematically.
  • a fuel-air mixture is burned and the thermal energy released in the process is converted to air or a medium, e.g. B. service water transfer.
  • the flue gas generated in the burner device 1 is fed to the heat exchanger 2 .
  • the starting process of the burner device 1 described below is controlled by the control device 3 .
  • the burner device shown schematically in Fig. 2 has a combustion chamber in which the fuel-air mixture is burned and the resulting flue gas (see the arrow on the right-hand side) is discharged to the right here to be converted to room air or air via the heat exchanger e.g. B. to be transferred to domestic water.
  • the combustion process is started by the glow plug 100 . It is indicated here that glow plug 100 is subjected to a pulse-modulated electrical voltage. The temperature that then occurs when glow plug 100 leads to the evaporation of a fuel, e.g. B. diesel fuel, and thereby to generate a fuel-air mixture.
  • the required combustion air (indicated by the left arrow) is supplied by the combustion air fan 101 .
  • the fuel is introduced into the combustion chamber by a fuel pump 102 . This is done here in particular in the immediate vicinity of the glow plug 100, so that the liquid fuel in the temperature environment generated by the glow plug 100 evaporates. After a certain period of time, a self-sustaining flame (symbolically indicated here) has formed and glow plug 100 can be switched off.
  • the sensor 104 in the combustion chamber is used to detect the flame.
  • a temperature sensor 103 which measures the temperature of the combustion air supplied, is present for the starting process described below.
  • the control device 3 shown in FIG. 1 is supplied with the signals from the sensors for the flame 104 and for the temperature of the combustion air 103 .
  • the control device 3 controls the glow plug 100 - or more precisely: the activation of the glow plug 100 -, the fuel pump 102 and the combustion air fan 101.
  • FIG. 3 schematically shows an example of a sequence for starting the burner device.
  • the start phase takes place between times 1 and 7.
  • the top line a) shows the rated output of the glow plug over time t.
  • the glow plug is switched on at point in time 1 and with its rated power, which is determined by measuring the current and voltage and setting a PWM voltage (an electrical voltage regulated by pulse width modulation). is regulated.
  • a PWM voltage an electrical voltage regulated by pulse width modulation
  • Line b) shows the progression of the heating energy of the glow plug as a function of time t.
  • the energy is calculated, for example, by numerical integration of the power.
  • the ramp-shaped profile that sets in up to a maximum at point in time 6 can be seen.
  • the output of the glow plug is regulated to be constant between points in time 3 and 4, it can be assumed that the increase in energy is linear.
  • a scaled setpoint and a setpoint for the heating energy are also entered.
  • Line c) shows the activation of the combustion air fan in relation to the target speed.
  • the blower is first operated between times 1 and 2 and then switched off. Only at point in time 3 is the blower switched on again, in order then to be operated continuously. It is indicated that the speed and thus the Ge speed of the fan between times 1 and 2 is higher than after time point 3, ie during normal operation of the burner device.
  • a setpoint speed is specified for normal operation. In one embodiment, the setpoint speed is specified as a function of the measured temperature of the combustion air.
  • Line d shows the activation of the fuel supply.
  • the fuel is from the date
  • Line e refers to the flame detection sensor.
  • the point in time at which the flame and thus the start of the combustion phase is recognized is the point in time
  • Combustion thus takes place continuously from point in time 5 or a flame is permanently present.
  • the combustion air fan is started and operated until the combustion path, ie in particular the combustion chamber, has been flushed with fresh air. Therefore, at time 2, the blower switched off.
  • the duration between times 1 and 2 can be set in such a way that it is ensured that fresh air reaches the temperature sensor.
  • the predetermined time therefore depends on how long it takes to convey the fresh air. Therefore, the duration based on the circumstances of z. B. be measured in the heater built-in burner device.
  • the duration is specified as a function of a maximum exhaust gas or fresh air path, depending on the respective line cross-sections and the properties of the fresh air blower, e.g. B. the fan speed and / or the prod ble volume flow.
  • the temperature of the combustion air is determined based on the measurement of the temperature sensor. This happens at time 2.
  • three target values for controlling the glow plug are determined, ie z. B. calculated by interpolation: On the one hand, this is a target value for the heating energy and on the other hand a scaled target value, which is preferably between 50% and 100% of the target value. Finally, it is the setpoint for the delay time, which decreases as the measured temperature increases (see further explanations).
  • the target value of the heating energy or the energy target value is dependent on the temperature of the combustion air, insofar as a higher temperature is associated with a lower target value and a lower temperature with a higher target value.
  • the relationships between the setpoint and the temperature of the combustion air are z. B. determined from comparative measurements.
  • the scaled target value is determined, for example, based on a scaling value between 0.5 and 1 and the target value.
  • the time required for the combustion air fan to reach the target speed required for operation is relevant for the scaling value. Thus, when the blower accelerates quickly, the time can be shorter. If the blower increases its number of revolutions only slowly, the delay time should be set longer.
  • the glow plug is controlled in such a way that its heating energy increases continuously.
  • the power and energy are continuously monitored by measuring voltage and current.
  • the blower for the combustion air is switched on. If the target value is then reached at point in time 4, the pump device is started, so that there is combustion air and fuel in the combustion chamber.
  • the fan has preferably reached its target number of revolutions at time 4 .
  • the heating energy of the glow plug is no longer determined after this point in time 4 . So e.g. For example, the calculation of the energy from the measured values for current and voltage is set. The heating energy of the glow plug increases as a result of the further activation, starting from the nominal or target output, beyond the target value.
  • a stabilization time extends up to point in time 7, after which it is assumed that a combustion state has been established which allows controlled operation of the burner device or the heating device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Combustion (AREA)
  • Regulation And Control Of Combustion (AREA)

Abstract

L'invention concerne un procédé de mise en marche d'un dispositif brûleur (1). Selon ledit procédé, la température de l'air de combustion est mesurée, et une valeur de consigne de l'énergie de chauffage d'un crayon de préchauffage (100) est spécifiée, ladite valeur de consigne étant fonction de la température. L'invention concerne également un dispositif de chauffage doté d'un tel dispositif brûleur (1).
EP22716850.7A 2021-07-09 2022-03-22 Procédé de mise en marche d'un dispositif brûleur et dispositif de chauffage doté d'un dispositif brûleur Active EP4367443B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021003528.3A DE102021003528A1 (de) 2021-07-09 2021-07-09 Verfahren zum Starten einer Brennervorrichtung sowie Heizvorrichtung mit Brennvorrichtung
PCT/EP2022/000030 WO2023280431A1 (fr) 2021-07-09 2022-03-22 Procédé de mise en marche d'un dispositif brûleur et dispositif de chauffage doté d'un dispositif brûleur

Publications (2)

Publication Number Publication Date
EP4367443A1 true EP4367443A1 (fr) 2024-05-15
EP4367443B1 EP4367443B1 (fr) 2025-06-11

Family

ID=81326682

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22716850.7A Active EP4367443B1 (fr) 2021-07-09 2022-03-22 Procédé de mise en marche d'un dispositif brûleur et dispositif de chauffage doté d'un dispositif brûleur

Country Status (6)

Country Link
US (1) US20240310045A1 (fr)
EP (1) EP4367443B1 (fr)
CN (1) CN117616231A (fr)
AU (1) AU2022308603A1 (fr)
DE (1) DE102021003528A1 (fr)
WO (1) WO2023280431A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63127011A (ja) * 1986-11-15 1988-05-30 Isuzu Motors Ltd 燃焼器の制御装置
DE19924329B4 (de) 1999-03-18 2005-06-16 J. Eberspächer GmbH & Co. KG Heizgerät für ein Kraftfahrzeug
DE10140972B4 (de) * 2001-08-27 2009-05-07 Webasto Ag Verfahren und System zum Betreiben eines Fahrzeugheizgerätes
DE102004062831A1 (de) 2004-12-27 2006-07-13 J. Eberspächer GmbH & Co. KG Verfahren zum Starten eines Fahrzeugheizgerätes und Fahrzeugheizgerät
DE102008008895B4 (de) * 2008-02-13 2017-11-09 Eberspächer Climate Control Systems GmbH & Co. KG Verfahren zum Wiederholstart des Brennbetriebs in einem brennstoffbetriebenen Heizgerät

Also Published As

Publication number Publication date
WO2023280431A1 (fr) 2023-01-12
AU2022308603A1 (en) 2024-01-18
DE102021003528A1 (de) 2023-01-12
CN117616231A (zh) 2024-02-27
US20240310045A1 (en) 2024-09-19
EP4367443B1 (fr) 2025-06-11

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