EP2631541A1 - Method for operating a gas burner - Google Patents

Method for operating a gas burner Download PDF

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Publication number
EP2631541A1
EP2631541A1 EP12157091.5A EP12157091A EP2631541A1 EP 2631541 A1 EP2631541 A1 EP 2631541A1 EP 12157091 A EP12157091 A EP 12157091A EP 2631541 A1 EP2631541 A1 EP 2631541A1
Authority
EP
European Patent Office
Prior art keywords
gas
air mixture
dead time
burner
air
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
EP12157091.5A
Other languages
German (de)
French (fr)
Other versions
EP2631541B1 (en
Inventor
Gerwin Langius
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.)
Garrett Motion SARL
Original Assignee
Honeywell Technologies SARL
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Filing date
Publication date
Application filed by Honeywell Technologies SARL filed Critical Honeywell Technologies SARL
Priority to EP12157091.5A priority Critical patent/EP2631541B1/en
Publication of EP2631541A1 publication Critical patent/EP2631541A1/en
Application granted granted Critical
Publication of EP2631541B1 publication Critical patent/EP2631541B1/en
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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
    • F23N1/00—Regulating fuel supply
    • F23N1/02—Regulating fuel supply conjointly with air supply
    • F23N1/022—Regulating fuel supply conjointly with air supply using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N3/00—Regulating air supply or draught
    • F23N3/002—Regulating air supply or draught 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
    • F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel
    • F23N5/184—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel 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
    • F23N5/20—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays
    • F23N5/203—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2223/00—Signal processing; Details thereof
    • F23N2223/48—Learning / Adaptive control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/20—Calibrating devices
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2241/00—Applications
    • F23N2241/06—Space-heating and heating water

Definitions

  • the present patent application relates to a method for operating a gas burner.
  • EP 0 833 106 B1 discloses a method for operating a gas burner. According to this prior art document, during burner-on phases of the gas burner a defined gas/air mixture having a defined mixing ratio of gas and air is provided to a burner chamber of the gas burner. The defined gas/air mixture is provided by mixing an air flow provided by an air duct with a gas flow provided by a gas duct. The quantity of the air flow is adjusted by a fan. The defined mixing ratio of the gas/air mixture is controlled by a controller.
  • EP 0 833 106 B1 It is further known from EP 0 833 106 B1 that the defined gas/air mixture has to be calibarted to the quality of the gas in order to ensure an optimum and complete combustion of the gas.
  • the quality of the gas is defined by the so-called "Wobbe-Index”.
  • EP 0 833 106 B1 disclosed a method to calibrate the defined gas/air mixture to different gas qualities depending on a signal provided by an ionization sensor.
  • EP 0 962 703 B1 discloses that the calibration of the defined gas/air mixture to different gas qualities on basis of a signal provided by an ionization sensor shall only be performed in a range close to full-load operation of the gas burner, whereby the range close to full full-load operation lies between 60% and 100% of full full-load operation of the gas burner.
  • EP 1 309 821 B1 discloses that the calibration of the defined gas/air mixture to different gas qualities on basis of a signal provided by an ionization sensor shall be only performed at selected times, namely immediately after installation of the sensor and/or immediately after restart of the gas burner and/or immediately after a reset.
  • DE 10 2010 026 389 A1 discloses a method to control a so-called " ⁇ -value" of the defined gas/air mixture on basis of a dead time between a change of the gas/air mixture and a signal change of sensor positioned downstream of a mixing device used to mix the air flow with the gas flow.
  • DE 10 2010 026 389 A1 relates to a method to control the air flow and/or the gas flow depending on said dead time.
  • a method for operating a gas burner according to a first aspect of the present application is defined in the claim 1.
  • the gas/air mixture is changed and a dead time between the change of the gas/air mixture and a corresponding signal change of a sensor positioned downstream of the mixing device is determined.
  • the dead time is compared with a reference value, whereby the defined gas/air mixture is calibrated to different gas qualities only if the determined dead time is equal or smaller than the reference value.
  • the method according to the first aspect of the present application is directed to the calibration of the defined gas/air mixture to different gas qualities.
  • the calibration is only performed if the dead time is equal or smaller than the reference value.
  • the dead time is an indication of the burner load.
  • the dead time and thereby the indication of the burner load can be determined using sensors being present in the gas burner application. No additional sensors are required.
  • the method is easy, reliable and cost effective.
  • only the decision if the calibration of the defined gas/air mixture is performed or if the calibration of the gas/air mixture is not performed depends on the determined dead time.
  • the calibration of the gas/air mixture as such is independent from the determined dead time.
  • Another method for operating a gas burner is defined in the claim 7.
  • the gas/air mixture is changed and a dead time between the change gas/air mixture and a corresponding signal change of sensor positioned downstream of the mixing device is determined.
  • the dead time is compared with a reference value depending on the speed of a fan adjusting the quantity of the air flow, whereby a blocked flue is determined when the dead time is equal or larger than the reference value.
  • the method according to the second aspect of the present application is directed to the diction of a blocked flue. No additional sensors are required.
  • the method is easy, reliable and cost effective.
  • both methods are used in combination with each other.
  • the present application further relates to a controller of a gas burner having means for performing the method according to the first aspect of the present application and/or means for performing the method according to the second aspect of the present application.
  • Figure 1 shows a schematic view of a gas burner 10.
  • the gas burner comprises a burner chamber 11 in which combustion of a defined gas/air mixture having a defined mixing ratio of gas and air takes place during burner-on phases of the gas burner 10.
  • the combustion of the gas/air mixture results into flames 12 monitored by e.g. an ionization sensor 13.
  • the defined gas/air mixture is provided to the burner chamber 11 of the gas burner 10 by mixing an air flow with a gas flow.
  • a fan 14 sucks in air flowing through an air duct 15 and gas flowing though a gas duct 16.
  • a gas valve 17 for adjusting the gas flow through the gas duct 16 and safety valves 18, 19 are assigned to the gas duct 16.
  • the defined gas/air mixture having the defined mixing ratio of gas and air is provided to the burner chamber 11 of the gas burner 10.
  • the defined gas/air mixture is provided by mixing the air flow provided by an air duct 15 with a gas flow provided by a gas duct 16.
  • the air flow and the gas flow become preferably mixed by a mixing device 23.
  • a mixing device can be designed as a so-called Venturi nozzle.
  • the quantity of the air flow and thereby the quantity of the gas/air mixture flow is adjusted by the fan 14, namely by the speed of the fan 14.
  • the fan speed can be adjusted by an actuator 22 of the fan 14.
  • the defined mixing ratio of the defined gas/air mixture is controlled by a controller 20.
  • the controller 20 generates a control variable for the gas valve 17, namely for an actuator 21 of the gas valve 17.
  • the gas valve position of the gas valve 17 is adjusted by the actuator 21 of the same on basis of this control variable in order to provide the defined mixing ratio of gas and air in the defined gas/air mixture.
  • the defined mixing ratio of the defined gas/air mixture is controlled by a controller 20.
  • the control of the defined mixing ratio of the gas/air mixture is preferably based on a signal provided by the ionization sensor 13.
  • the controller 20 compares an actual value of the signal provided by the ionization sensor 13 with a corresponding nominal value, whereby a control deviation between said actual value and said nominal value is used by the controller to determine a control variable for the actuator 21 of the gas valve 17 in such a way that the actual value follows the nominal value. In this way the defined mixing ratio of the defined gas/air mixture is kept constant.
  • This control of the gas flow by the control variable for the actuator 21 of the gas valve 17 is also often called modulation of gas flow.
  • the quantity of the air flow and thereby the quantity of the gas/air mixture flow is adjusted by the fan 14, whereby the controller 20 provides a control variable for the actuator 22 of the fan 14 for adjusting the quantity of air flow and thereby the quantity of gas/air mixture flow.
  • the controller 20 provides a control variable for the actuator 22 of the fan 14 for adjusting the quantity of air flow and thereby the quantity of gas/air mixture flow.
  • Exhaust gas resulting form the combustion of the defined gas/air mixture within the burner chamber 11 during burner-on phases of the gas burner 10 is leaving the burner chamber 11 through an exhaust flue 25 of the burner chamber 11 of the gas burner 10.
  • An exhaust gas temperature sensor 24 may be assigned to the exhaust flue 25.
  • the controller 20 comprises means for controlling the defined mixing ratio of the defined gas/air mixture by modulating the gas flow and means for controlling the burner load by modulating the speed of the fan 14. Further on, the controller 20 comprises means for calibrating the defined mixing ratio of the defined gas/air mixture to different gas qualities on basis of a signal provided by a sensor positioned downstream of the mixing device 23.
  • the calibration of the defined mixing ratio of gas and air of the defined gas/air mixture to different gas qualities as such is known to the person skilled, e.g. from EP 0 833 106 B1 .
  • the calibration as such is preferably performed on basis a signal provided by the ionization sensor 13 positioned downstream the mixing device 23.
  • the controller 20 changes the gas/air mixture and determines a dead time between the change of the gas/air mixture and a corresponding signal change of sensor positioned downstream of the mixing device 23.
  • the sensor which is used to determine the above dead time and the sensor which is used for performing the calibration of the defined gas/air mixture to different gas qualities as such can be the same.
  • the ionization sensor 13 is used to determine the dead time and is further used to perform the calibration as such.
  • the sensor which is used to determine the above dead time and the sensor which is used for performing the calibration of the defined gas/air mixture to different gas qualities as such can be different sensors.
  • the exhaust gas temperature sensor 24 is used to determine the dead time and the ionization sensor 13 is used to perform the calibration as such.
  • Other sensors can be used to determine the above dead time, e.g. CO sensor or O 2 sensor detecting the CO or O 2 content in the exhaust gas.
  • the controller 20 compares the above dead with a reference value stored in the controller 20.
  • the defined mixing ratio of the defined gas/air mixture is calibrated to different gas qualities only if the determined dead time is equal or smaller than the reference value.
  • the defined mixing ratio of the defined gas/air mixture is not calibrated to different gas qualities if the determined dead time is greater than the reference value.
  • the decision if the calibration of the defined gas/air mixture to different gas qualities is performed or if this calibration of the gas/air mixture is not performed depends on the above dead time.
  • the calibration of the defined gas/air mixture to different gas qualities as such is independent from the determined dead time.
  • the control of the defined mixing ratio of the defined gas/air mixture by modulating the gas flow and the control of the burner load by modulating the speed of the fan 14 are both independent from the determined dead time.
  • the dead time is compared with a reference value depending on the speed of the fan 14.
  • a blocked exhaust flue 25 is determined when the dead time is equal or larger than the reference value.
  • the reference value which is used in the first aspect of the present application does not depend on the speed of the fan 14.
  • the reference value which is used in the second aspect of the present application depends on the speed of the fan 14.
  • Figure 2 shows a curve in which the relationship of reference value for the dead time ⁇ t and the speed n of the fan 14 are shown.
  • the controller 20 knows the actual speed n of the fan 14 and can determine from this fan speed n the reference value for the dead time ⁇ t. If the dead time is equal or larger than this reference value, the controller 20 detects a blocked exhaust flue 25.
  • the dead time is compared with a first reference value and a second reference value both depending on the speed of the fan 14.
  • a warning signal is generated when the dead time is equal or larger than the first reference value.
  • the burner 10 is turned off when the dead time is equal or larger than the second reference value.
  • the second reference value is larger than the first reference value.

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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)

Abstract

Method for operating a gas burner (10), wherein during burner-on phases a defined gas/air mixture having a defined mixing ratio of gas and air is provided to a burner chamber (11) of the gas burner (10) for combusting the defined gas/air mixture within the burner chamber (11). The defined gas/air mixture is provided by a mixing device (23) mixing an air flow provided by an air duct (15) with a gas flow provided by a gas duct (16). The defined mixing ratio of gas and air of the defined gas/air mixture is calibrated to different gas qualities on basis of a signal provided by a sensor (13) positioned downstream of the mixing device (23). Before the calibration of the defined gas/air mixture is started the gas/air mixture is changed and a dead time between the change of the gas/air mixture and a corresponding signal change of a sensor (13, 24) positioned downstream of the mixing device (23) is determined. The dead time is compared with a reference value, whereby the defined gas/air mixture is calibrated to different gas qualities only if the determined dead time is equal or smaller than the reference value.

Description

  • The present patent application relates to a method for operating a gas burner.
  • EP 0 833 106 B1 discloses a method for operating a gas burner. According to this prior art document, during burner-on phases of the gas burner a defined gas/air mixture having a defined mixing ratio of gas and air is provided to a burner chamber of the gas burner. The defined gas/air mixture is provided by mixing an air flow provided by an air duct with a gas flow provided by a gas duct. The quantity of the air flow is adjusted by a fan. The defined mixing ratio of the gas/air mixture is controlled by a controller.
  • It is further known from EP 0 833 106 B1 that the defined gas/air mixture has to be calibarted to the quality of the gas in order to ensure an optimum and complete combustion of the gas. The quality of the gas is defined by the so-called "Wobbe-Index". EP 0 833 106 B1 disclosed a method to calibrate the defined gas/air mixture to different gas qualities depending on a signal provided by an ionization sensor.
  • EP 0 962 703 B1 discloses that the calibration of the defined gas/air mixture to different gas qualities on basis of a signal provided by an ionization sensor shall only be performed in a range close to full-load operation of the gas burner, whereby the range close to full full-load operation lies between 60% and 100% of full full-load operation of the gas burner.
  • EP 1 309 821 B1 discloses that the calibration of the defined gas/air mixture to different gas qualities on basis of a signal provided by an ionization sensor shall be only performed at selected times, namely immediately after installation of the sensor and/or immediately after restart of the gas burner and/or immediately after a reset.
  • DE 10 2010 026 389 A1 discloses a method to control a so-called "λ-value" of the defined gas/air mixture on basis of a dead time between a change of the gas/air mixture and a signal change of sensor positioned downstream of a mixing device used to mix the air flow with the gas flow. DE 10 2010 026 389 A1 relates to a method to control the air flow and/or the gas flow depending on said dead time.
  • Against this background, novel methods for operating a gas burner are provided.
  • A method for operating a gas burner according to a first aspect of the present application is defined in the claim 1. Before the calibration of the defined gas/air mixture is started, the gas/air mixture is changed and a dead time between the change of the gas/air mixture and a corresponding signal change of a sensor positioned downstream of the mixing device is determined. The dead time is compared with a reference value, whereby the defined gas/air mixture is calibrated to different gas qualities only if the determined dead time is equal or smaller than the reference value.
  • The method according to the first aspect of the present application is directed to the calibration of the defined gas/air mixture to different gas qualities. The calibration is only performed if the dead time is equal or smaller than the reference value. The dead time is an indication of the burner load. The dead time and thereby the indication of the burner load can be determined using sensors being present in the gas burner application. No additional sensors are required. The method is easy, reliable and cost effective.
  • According to a preferred embodiment of the invention, only the decision if the calibration of the defined gas/air mixture is performed or if the calibration of the gas/air mixture is not performed depends on the determined dead time. The calibration of the gas/air mixture as such is independent from the determined dead time.
  • Another method for operating a gas burner is defined in the claim 7. The gas/air mixture is changed and a dead time between the change gas/air mixture and a corresponding signal change of sensor positioned downstream of the mixing device is determined. The dead time is compared with a reference value depending on the speed of a fan adjusting the quantity of the air flow, whereby a blocked flue is determined when the dead time is equal or larger than the reference value.
  • The method according to the second aspect of the present application is directed to the diction of a blocked flue. No additional sensors are required. The method is easy, reliable and cost effective.
  • Preferably, both methods are used in combination with each other.
  • The present application further relates to a controller of a gas burner having means for performing the method according to the first aspect of the present application and/or means for performing the method according to the second aspect of the present application.
  • Preferred developments of the invention are provided by the dependent claims and the description which follows. Exemplary embodiments are explained in more detail on the basis of the drawing, in which:
    • Figure 1
    shows a schematic view of a gas burner; and
    Figure 2
    shows diagram used in connection with one aspect of the present invention.
  • Figure 1 shows a schematic view of a gas burner 10. The gas burner comprises a burner chamber 11 in which combustion of a defined gas/air mixture having a defined mixing ratio of gas and air takes place during burner-on phases of the gas burner 10. The combustion of the gas/air mixture results into flames 12 monitored by e.g. an ionization sensor 13.
  • The defined gas/air mixture is provided to the burner chamber 11 of the gas burner 10 by mixing an air flow with a gas flow. A fan 14 sucks in air flowing through an air duct 15 and gas flowing though a gas duct 16. A gas valve 17 for adjusting the gas flow through the gas duct 16 and safety valves 18, 19 are assigned to the gas duct 16.
  • The defined gas/air mixture having the defined mixing ratio of gas and air is provided to the burner chamber 11 of the gas burner 10. The defined gas/air mixture is provided by mixing the air flow provided by an air duct 15 with a gas flow provided by a gas duct 16. The air flow and the gas flow become preferably mixed by a mixing device 23. Such a mixing device can be designed as a so-called Venturi nozzle.
  • The quantity of the air flow and thereby the quantity of the gas/air mixture flow is adjusted by the fan 14, namely by the speed of the fan 14. The fan speed can be adjusted by an actuator 22 of the fan 14.
  • The defined mixing ratio of the defined gas/air mixture is controlled by a controller 20. The controller 20 generates a control variable for the gas valve 17, namely for an actuator 21 of the gas valve 17. The gas valve position of the gas valve 17 is adjusted by the actuator 21 of the same on basis of this control variable in order to provide the defined mixing ratio of gas and air in the defined gas/air mixture.
  • As mentioned above, the defined mixing ratio of the defined gas/air mixture is controlled by a controller 20. The control of the defined mixing ratio of the gas/air mixture is preferably based on a signal provided by the ionization sensor 13. The controller 20 compares an actual value of the signal provided by the ionization sensor 13 with a corresponding nominal value, whereby a control deviation between said actual value and said nominal value is used by the controller to determine a control variable for the actuator 21 of the gas valve 17 in such a way that the actual value follows the nominal value. In this way the defined mixing ratio of the defined gas/air mixture is kept constant. This control of the gas flow by the control variable for the actuator 21 of the gas valve 17 is also often called modulation of gas flow.
  • As also mentioned above, the quantity of the air flow and thereby the quantity of the gas/air mixture flow is adjusted by the fan 14, whereby the controller 20 provides a control variable for the actuator 22 of the fan 14 for adjusting the quantity of air flow and thereby the quantity of gas/air mixture flow. By changing the speed of the fan 14 the load of the gas burner 10 can be adjusted. Over the entire load range of the gas burner 10 the defined mixing ratio of the defined gas/air mixture is kept constant. This control of the fan speed of the fan 14 is also often called modulation of air flow or modulation of the burner load.
  • Exhaust gas resulting form the combustion of the defined gas/air mixture within the burner chamber 11 during burner-on phases of the gas burner 10 is leaving the burner chamber 11 through an exhaust flue 25 of the burner chamber 11 of the gas burner 10. An exhaust gas temperature sensor 24 may be assigned to the exhaust flue 25.
  • As described above, the controller 20 comprises means for controlling the defined mixing ratio of the defined gas/air mixture by modulating the gas flow and means for controlling the burner load by modulating the speed of the fan 14. Further on, the controller 20 comprises means for calibrating the defined mixing ratio of the defined gas/air mixture to different gas qualities on basis of a signal provided by a sensor positioned downstream of the mixing device 23.
  • The calibration of the defined mixing ratio of gas and air of the defined gas/air mixture to different gas qualities as such is known to the person skilled, e.g. from EP 0 833 106 B1 . The calibration as such is preferably performed on basis a signal provided by the ionization sensor 13 positioned downstream the mixing device 23.
  • According to the first aspect of the present application, before the calibration of the defined gas/air mixture as such is started by the controller 20, the controller 20 changes the gas/air mixture and determines a dead time between the change of the gas/air mixture and a corresponding signal change of sensor positioned downstream of the mixing device 23.
  • The sensor which is used to determine the above dead time and the sensor which is used for performing the calibration of the defined gas/air mixture to different gas qualities as such can be the same. In this case, e.g. the ionization sensor 13 is used to determine the dead time and is further used to perform the calibration as such.
  • Alternatively, the sensor which is used to determine the above dead time and the sensor which is used for performing the calibration of the defined gas/air mixture to different gas qualities as such can be different sensors. In this case, e.g. the exhaust gas temperature sensor 24 is used to determine the dead time and the ionization sensor 13 is used to perform the calibration as such.
  • Other sensors can be used to determine the above dead time, e.g. CO sensor or O2 sensor detecting the CO or O2 content in the exhaust gas.
  • The controller 20 compares the above dead with a reference value stored in the controller 20.
  • The defined mixing ratio of the defined gas/air mixture is calibrated to different gas qualities only if the determined dead time is equal or smaller than the reference value. The defined mixing ratio of the defined gas/air mixture is not calibrated to different gas qualities if the determined dead time is greater than the reference value.
  • Accordingly, only the decision if the calibration of the defined gas/air mixture to different gas qualities is performed or if this calibration of the gas/air mixture is not performed depends on the above dead time. The calibration of the defined gas/air mixture to different gas qualities as such is independent from the determined dead time. Further on, the control of the defined mixing ratio of the defined gas/air mixture by modulating the gas flow and the control of the burner load by modulating the speed of the fan 14 are both independent from the determined dead time.
  • According to the second aspect of the present application, which is preferably used in combination with the first aspect of the present application, the dead time is compared with a reference value depending on the speed of the fan 14. A blocked exhaust flue 25 is determined when the dead time is equal or larger than the reference value.
  • The reference value which is used in the first aspect of the present application does not depend on the speed of the fan 14. The reference value which is used in the second aspect of the present application depends on the speed of the fan 14. Figure 2 shows a curve in which the relationship of reference value for the dead time Δt and the speed n of the fan 14 are shown. The controller 20 knows the actual speed n of the fan 14 and can determine from this fan speed n the reference value for the dead time Δt. If the dead time is equal or larger than this reference value, the controller 20 detects a blocked exhaust flue 25.
  • Preferably, the dead time is compared with a first reference value and a second reference value both depending on the speed of the fan 14. A warning signal is generated when the dead time is equal or larger than the first reference value. The burner 10 is turned off when the dead time is equal or larger than the second reference value. The second reference value is larger than the first reference value.
  • List of reference signs
    • 10
    gas burner
    11
    burner chamber
    12
    flame
    13
    ionization sensor
    14
    fan
    15
    air duct
    16
    gas duct
    17
    regulating valve
    18
    safety valve
    19
    safety valve
    20
    controller
    21
    actuator
    22
    actuator
    23
    mixing device
    24
    exhaust gas temperature sensor
    25
    exhaust flue

Claims (10)

  1. Method for operating a gas burner (10), wherein during burner-on phases a defined gas/air mixture having a defined mixing ratio of gas and air is provided to a burner chamber (11) of the gas burner (10) for combusting the defined gas/air mixture within the burner chamber (11), wherein the defined gas/air mixture is provided by a mixing device (23) mixing an air flow provided by an air duct (15) with a gas flow provided by a gas duct (16), and wherein the defined mixing ratio of gas and air of the defined gas/air mixture is calibrated to different gas qualities on basis of a signal provided by a sensor (13) positioned downstream of the mixing device (23), characterized in that before the calibration of the defined gas/air mixture is started the gas/air mixture is changed and a dead time between the change of the gas/air mixture and a signal change of a sensor (13, 24) positioned downstream of the mixing device (23) is determined, and that the dead time is compared with a reference value, whereby the defined gas/air mixture is calibrated to different gas qualities only if the determined dead time is equal or smaller than the reference value.
  2. Method as claimed in claim 1, characterized in that the defined gas/air mixture is not calibrated to different gas qualities if the determined dead time is greater than the reference value.
  3. Method as claimed in claim 1 or 2, characterized in that only the decision if the calibration of the defined gas/air mixture is performed or if the calibration of the gas/air mixture is not performed depends on the determined dead time, whereby the calibration of the defined gas/air mixture as such is independent from the determined dead time.
  4. Method as claimed in one of claims 1 to 3, characterized in that the sensor (13) which used for performing the calibration of the defined gas/air mixture to different gas qualities and the sensor (13) which used to determine the dead time are the same.
  5. Method as claimed in one of claims 1 to 3, characterized in that the sensor (13) which used for performing the calibration of the defined gas/air mixture to different gas qualities and the sensor (24) which used to determine the dead time are different.
  6. Method as claimed in one of claims 1 to 5, characterized by features as claimed in one of claims 7 to 9.
  7. Method for operating a gas burner (10), wherein during burner-on phases a defined gas/air mixture having a defined mixing ratio of gas and air is provided to a burner chamber (11) of the gas burner (10) for combusting the defined gas/air mixture within the burner chamber (11), wherein the defined gas/air mixture is provided by a mixing device (23) mixing an air flow provided by an air duct (15) with a gas flow provided by a gas duct (16), characterized in that the gas/air mixture is changed and a dead time between the change of the gas/air mixture and a signal change of a sensor (13, 24) positioned downstream of the mixing device (23) is determined, and that the dead time is compared with a reference value depending on the speed of a fan (14) adjusting the quantity of the air flow, whereby a blocked exhaust flue (25) is determined when the dead time is equal or larger than the reference value.
  8. Method as claimed in claim 7, characterized in that the dead time is compared with a first reference value depending on the speed of the fan (14), whereby a warning signal is generated when the dead time is equal or larger than the first reference value.
  9. Method as claimed in claim 7 or 8, characterized in that the dead time is compared with a second reference value depending on the speed of the fan (10'4), whereby the burner is turned off when the dead time is equal or larger than the second reference value.
  10. Controller (20) of a gas burner, comprising means for controlling a defined gas/air mixture, and further comprising means for calibrating the defined gas/air mixture to different gas qualities, characterized by means for performing the method as claimed in one of claims 1 to 5 and/or by means for performing the method as claimed in one of claims 7 to 9.
EP12157091.5A 2012-02-27 2012-02-27 Method for operating a gas burner Active EP2631541B1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3043115A1 (en) * 2015-01-12 2016-07-13 Honeywell Technologies Sarl Method for operating a premix gas burner
DE102015223177A1 (en) * 2015-11-24 2017-05-24 Robert Bosch Gmbh Heater device, in particular gas and / or oil burner device, and method for operating a heater device
EP3228936A1 (en) * 2016-04-07 2017-10-11 Honeywell Technologies Sarl Method for operating a gas burner appliance
EP3477201A1 (en) * 2017-10-26 2019-05-01 Honeywell Technologies Sarl Method for operating a gas burner appliance

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020106040A1 (en) 2020-03-05 2021-09-09 Ebm-Papst Landshut Gmbh Method for monitoring and regulating a process in a gas boiler

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3937290A1 (en) * 1988-11-10 1990-05-17 Vaillant Joh Gmbh & Co METHOD AND DEVICE FOR PRODUCING A FUEL-COMBUSTION AIR MIXTURE TO BE COMBUSED FOR COMBUSTION
DE4433425A1 (en) * 1994-09-20 1996-03-21 Stiebel Eltron Gmbh & Co Kg Control appts. for adjusting gas to air mixture in gas burner esp. gas torch burner
DE19936696A1 (en) * 1999-08-04 2001-02-08 Ruhrgas Ag Premix burner operation process, involving periodically briefly setting burner to full load or slight overload when operating in partial load region
EP0833106B1 (en) 1996-09-26 2001-11-14 Honeywell B.V. Method and device for operation optimisation of a gas burner
EP1309821B1 (en) 2000-06-19 2005-03-30 Honeywell B.V. Regulation method for gas burners
US20050092851A1 (en) * 2003-10-31 2005-05-05 Troost Henry E. Blocked flue detection methods and systems
EP0962703B1 (en) 1998-06-02 2005-08-17 Honeywell B.V. Control method for gas burner
EP2354657A2 (en) * 2010-01-15 2011-08-10 Honeywell Technologies Sarl Method for operating a gas burner
DE102010026389A1 (en) 2010-07-07 2012-01-12 Robert Bosch Gmbh Method for controlling combustion in a gas or oil burner

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3937290A1 (en) * 1988-11-10 1990-05-17 Vaillant Joh Gmbh & Co METHOD AND DEVICE FOR PRODUCING A FUEL-COMBUSTION AIR MIXTURE TO BE COMBUSED FOR COMBUSTION
DE4433425A1 (en) * 1994-09-20 1996-03-21 Stiebel Eltron Gmbh & Co Kg Control appts. for adjusting gas to air mixture in gas burner esp. gas torch burner
EP0833106B1 (en) 1996-09-26 2001-11-14 Honeywell B.V. Method and device for operation optimisation of a gas burner
EP0962703B1 (en) 1998-06-02 2005-08-17 Honeywell B.V. Control method for gas burner
DE19936696A1 (en) * 1999-08-04 2001-02-08 Ruhrgas Ag Premix burner operation process, involving periodically briefly setting burner to full load or slight overload when operating in partial load region
EP1309821B1 (en) 2000-06-19 2005-03-30 Honeywell B.V. Regulation method for gas burners
US20050092851A1 (en) * 2003-10-31 2005-05-05 Troost Henry E. Blocked flue detection methods and systems
EP2354657A2 (en) * 2010-01-15 2011-08-10 Honeywell Technologies Sarl Method for operating a gas burner
DE102010026389A1 (en) 2010-07-07 2012-01-12 Robert Bosch Gmbh Method for controlling combustion in a gas or oil burner

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3043115A1 (en) * 2015-01-12 2016-07-13 Honeywell Technologies Sarl Method for operating a premix gas burner
DE102015223177A1 (en) * 2015-11-24 2017-05-24 Robert Bosch Gmbh Heater device, in particular gas and / or oil burner device, and method for operating a heater device
EP3228936A1 (en) * 2016-04-07 2017-10-11 Honeywell Technologies Sarl Method for operating a gas burner appliance
US10520186B2 (en) 2016-04-07 2019-12-31 Honeywell Technologies Sarl Method for operating a gas burner appliance
EP3477201A1 (en) * 2017-10-26 2019-05-01 Honeywell Technologies Sarl Method for operating a gas burner appliance
WO2019081464A1 (en) * 2017-10-26 2019-05-02 Honeywell Technologies Sarl Method for operating a gas burner appliance

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