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US20020172902A1 - Regulation method for gas burners - Google Patents

Regulation method for gas burners Download PDF

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Publication number
US20020172902A1
US20020172902A1 US10/069,749 US6974902A US2002172902A1 US 20020172902 A1 US20020172902 A1 US 20020172902A1 US 6974902 A US6974902 A US 6974902A US 2002172902 A1 US2002172902 A1 US 2002172902A1
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US
United States
Prior art keywords
gas
signal
sensor
air mixture
control method
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.)
Abandoned
Application number
US10/069,749
Inventor
Enno Vrolijk
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Individual
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Individual
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Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7646201&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US20020172902(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Publication of US20020172902A1 publication Critical patent/US20020172902A1/en
Abandoned 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
    • 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
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/003—Systems for controlling combustion using detectors sensitive to combustion gas properties
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2223/00—Signal processing; Details thereof
    • F23N2223/10—Correlation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • F23N2225/16—Measuring temperature burner temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/26—Measuring humidity
    • F23N2225/30—Measuring humidity measuring lambda
    • 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

Definitions

  • Control methods for gas burners are used for providing a gas-air mixture, i.e. for supplying a gas flow and a combustion air flow to a burner.
  • the fuel i.e. the gas
  • the latter has to be provided with an appropriately balanced gas-air mixture.
  • composition ratio The ratio between the gas flow and the combustion air flow or between the gas pressure and the combustion air pressure, respectively.
  • the quality of the gas provided by the gas supply varies—the quality of gas is defined by a so-called “Wobbe index”—, the gas-air mixture has to be appropriately varied in dependence on the quality of the gas to ensure an optimum and complete combustion.
  • the prior art discloses control methods according to which a signal of a sensor is used for adapting the gas-air mixture to different gas qualities.
  • a signal of a sensor is used for adapting the gas-air mixture to different gas qualities.
  • an ionization signal of a measuring electrode projecting into the burner flame of the gas burner is used for adapting the gas-air mixture to different gas qualities.
  • the signal of the sensor is used over the whole working range or operative range, respectively, of the burner for adapting the gas-air mixture to different gas qualities.
  • the signal of the sensor is used over the whole operating time of the burner.
  • the DE 198 24 523 A1 suggests a control method for gas burners in which the signal of the sensor is exclusively used in a range in the vicinity of a full load operation of the burner for adjusting the composition ratio in dependence on the gas quality. As soon as the working state of the burner leaves this range in the vicinity of the full load operation of the burner, the gas-air mixture is controlled while the last determined composition ratio is maintained.
  • the control method according to DE 198 24 523 A1 uses the signal of the sensor over the whole operating time of the burner in so far as the burner is operated in the range in the vicinity of the full load operation of the burner.
  • the present invention relates to an improved control method for gas burners for providing a gas-air mixture.
  • a signal of a sensor is used for adapting the gas-air mixture to different gas qualities.
  • the signal of the sensor is used for adapting the gas-air mixtures to different gas qualities at certain points in time only. This renders the control independent of aging processes of the sensor.
  • the present invention is based on the problem of providing an improved control method for gas burners.
  • the control method for gas burners is used for providing a gas-air mixture for a burner.
  • a gas flow and a combustion air flow are supplied to the burner.
  • the ratio between gas flow and combustion air flow or the ratio between gas pressure and combustion air pressure, respectively, is called composition ratio.
  • the combustion process in the burner is supervised by means of a signal supplied by a sensor.
  • the sensor may, for instance, be an ionization sensor, another flame supervision sensor, a gas quality sensor, a flue gas sensor, a combustion gas sensor, or the like. From the sensor signal, information on the combustion process and, thus, on the existing gas quality can be gained.
  • the signal of the sensor is exclusively used at selected points in time for adapting the gas-air mixture to different gas qualities. This ensures that the control is not adversely affected by aging processes of the sensor.
  • the signal of the sensor is exclusively used immediately after the installation of the sensor for adapting of the gas-air mixture to different gas qualities. In this way, it is ensured that the adaptation of the composition ratio is only effected in the case of new sensors which have not yet been subjected to any aging.
  • the signal of the sensor is exclusively used immediately after the installation of the sensor, immediately after a fresh start of the gas burner and immediately after a reset for adapting the gas-air mixture to different gas qualities.
  • “Fresh start” is to be understood such that this may be a renewed start of the operation after a voltage loss. Since the composition ratio is adapted at selected points in time only, negative influences by aging processes of the sensor can be minimized in this further development of the control method, as well.
  • the signal of the sensor is used for adapting the gas-air mixture to different gas qualities when stable operating conditions of the gas burner have been reached subsequent to the installation of the sensor, subsequent to a fresh start of the gas burner and/or subsequent to a reset. This improves the precision and the quality of the control.
  • a further advantageous embodiment of the control method according to the invention consists in that the signal of the sensor is used immediately after the installation of the sensor, immediately after a fresh start of the gas burner and/or immediately after a reset for adapting the gas-air mixture to different gas qualities, that, in dependence on the composition ratio established in this way, a range having an upper limit and a lower limit is established for the composition ratio of the gas-air mixture, and that, when the composition ratio established by means of the sensor signal leaves said range, the upper limit or the lower limit is used as composition ratio of the gas-air mixture.
  • the composition ratio surpasses the upper limit, said upper limit is used as composition ratio and, when it falls below the lower limit, said lower limit is used as composition ratio. In this way, negative influences on the control, caused by aging processes of the sensor can be minimized.
  • control method according to the invention is independent of the nature of the sensor or system used. It may be applied in conventional systems, such as described in DE 196 39 487 or also in so-called electronic gas controllers according to WO99/63272 and WO99/63273. Here, express reference shall be made to the disclosure content of WO99/63272 and WO99/63273, and this shall be part of the present description.
  • the method according to the invention can also be applied for modulating gas controllers where, immediately after the installation of the sensor, immediately after a fresh start of the gas burner and/or immediately after a reset, not only the gas-air mixture is adapted to different gas qualities, but also the input signal for the modulating gas controller is optimized at these points in time.
  • the gas burner is always started with an optimized gas-air mixture and an optimized input signal for the modulating gas controller. This has the advatage that a calbration between the input signal and the output signal of such a modulating gas controller can be dropped.

Landscapes

  • 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

The invention relates to a control method for gas burners for providing a gas-air mixture. A signal of a sensor is used for adapting the gas-air mixture to different gas qualities. According to the invention, the signal of the sensor is used for adapting the gas-air mixtures to different gas qualities at certain points in time only. This renders the control independent of aging processes of the sensor.

Description

    BACKGROUND OF THE INVENTION
  • Control methods for gas burners are used for providing a gas-air mixture, i.e. for supplying a gas flow and a combustion air flow to a burner. [0001]
  • In order to ensure an optimum and complete combustion of the fuel, i.e. the gas, within the gas burner, the latter has to be provided with an appropriately balanced gas-air mixture. The ratio between the gas flow and the combustion air flow or between the gas pressure and the combustion air pressure, respectively, is called “composition ratio”. However, since the quality of the gas provided by the gas supply varies—the quality of gas is defined by a so-called “Wobbe index”—, the gas-air mixture has to be appropriately varied in dependence on the quality of the gas to ensure an optimum and complete combustion. [0002]
  • For making it possible to consider the quality of the provided gas, the prior art discloses control methods according to which a signal of a sensor is used for adapting the gas-air mixture to different gas qualities. In the control methods according to DE-A-44 33 425, DE 39 37 290 A1 and DE 195 39 568 C1, for instance, an ionization signal of a measuring electrode projecting into the burner flame of the gas burner is used for adapting the gas-air mixture to different gas qualities. In the known control methods according to DE-A-44 33 425, DE 39 37 290 A1 as well as DE 195 39 568 C1, the signal of the sensor is used over the whole working range or operative range, respectively, of the burner for adapting the gas-air mixture to different gas qualities. Also, in said control methods, the signal of the sensor is used over the whole operating time of the burner. [0003]
  • Since, however, the signal of an ionization sensor does not provide any reliable information on the combustion ratios actually prevailing in the burner when the working loads of the burner are low, the DE 198 24 523 A1 suggests a control method for gas burners in which the signal of the sensor is exclusively used in a range in the vicinity of a full load operation of the burner for adjusting the composition ratio in dependence on the gas quality. As soon as the working state of the burner leaves this range in the vicinity of the full load operation of the burner, the gas-air mixture is controlled while the last determined composition ratio is maintained. However, also the control method according to DE 198 24 523 A1 uses the signal of the sensor over the whole operating time of the burner in so far as the burner is operated in the range in the vicinity of the full load operation of the burner. [0004]
    • BRIEF SUMMARY OF THE INVENTION
  • The present invention relates to an improved control method for gas burners for providing a gas-air mixture. A signal of a sensor is used for adapting the gas-air mixture to different gas qualities. The signal of the sensor is used for adapting the gas-air mixtures to different gas qualities at certain points in time only. This renders the control independent of aging processes of the sensor. [0005]
    • DETAILED DESCRIPTION OF THE INVENTION
  • Starting out from this, the present invention is based on the problem of providing an improved control method for gas burners. [0006]
  • In accordance with the invention, the problem is solved by a control method comprising the features of claim [0007] 1.
  • Preferred further developments of the invention result from the subclaims and the description. [0008]
  • The control method for gas burners is used for providing a gas-air mixture for a burner. To this end, a gas flow and a combustion air flow are supplied to the burner. The ratio between gas flow and combustion air flow or the ratio between gas pressure and combustion air pressure, respectively, is called composition ratio. [0009]
  • The combustion process in the burner is supervised by means of a signal supplied by a sensor. The sensor may, for instance, be an ionization sensor, another flame supervision sensor, a gas quality sensor, a flue gas sensor, a combustion gas sensor, or the like. From the sensor signal, information on the combustion process and, thus, on the existing gas quality can be gained. [0010]
  • According to the invention, the signal of the sensor is exclusively used at selected points in time for adapting the gas-air mixture to different gas qualities. This ensures that the control is not adversely affected by aging processes of the sensor. [0011]
  • Preferably, the signal of the sensor is exclusively used immediately after the installation of the sensor for adapting of the gas-air mixture to different gas qualities. In this way, it is ensured that the adaptation of the composition ratio is only effected in the case of new sensors which have not yet been subjected to any aging. [0012]
  • It is also conceivable that the signal of the sensor is exclusively used immediately after the installation of the sensor, immediately after a fresh start of the gas burner and immediately after a reset for adapting the gas-air mixture to different gas qualities. “Fresh start” is to be understood such that this may be a renewed start of the operation after a voltage loss. Since the composition ratio is adapted at selected points in time only, negative influences by aging processes of the sensor can be minimized in this further development of the control method, as well. [0013]
  • It is preferred that the signal of the sensor is used for adapting the gas-air mixture to different gas qualities when stable operating conditions of the gas burner have been reached subsequent to the installation of the sensor, subsequent to a fresh start of the gas burner and/or subsequent to a reset. This improves the precision and the quality of the control. [0014]
  • A further advantageous embodiment of the control method according to the invention consists in that the signal of the sensor is used immediately after the installation of the sensor, immediately after a fresh start of the gas burner and/or immediately after a reset for adapting the gas-air mixture to different gas qualities, that, in dependence on the composition ratio established in this way, a range having an upper limit and a lower limit is established for the composition ratio of the gas-air mixture, and that, when the composition ratio established by means of the sensor signal leaves said range, the upper limit or the lower limit is used as composition ratio of the gas-air mixture. Of course, when the composition ratio surpasses the upper limit, said upper limit is used as composition ratio and, when it falls below the lower limit, said lower limit is used as composition ratio. In this way, negative influences on the control, caused by aging processes of the sensor can be minimized. [0015]
  • The control method according to the invention is independent of the nature of the sensor or system used. It may be applied in conventional systems, such as described in DE 196 39 487 or also in so-called electronic gas controllers according to WO99/63272 and WO99/63273. Here, express reference shall be made to the disclosure content of WO99/63272 and WO99/63273, and this shall be part of the present description. [0016]
  • The adaptation according to the invention of the gas-air mixture to different gas qualities can also be designated as “calibration”. [0017]
  • In this connection it shall also be noted that the method according to the invention can also be applied for modulating gas controllers where, immediately after the installation of the sensor, immediately after a fresh start of the gas burner and/or immediately after a reset, not only the gas-air mixture is adapted to different gas qualities, but also the input signal for the modulating gas controller is optimized at these points in time. In this case, the gas burner is always started with an optimized gas-air mixture and an optimized input signal for the modulating gas controller. This has the advatage that a calbration between the input signal and the output signal of such a modulating gas controller can be dropped. [0018]

Claims (8)

What is claimed is:
1. A control method for gas burners for providing a gas-air mixture, namely for supplying a gas flow and a combustion air flow to a burner, a signal of a sensor being used for adapting the gas-air mixture to different gas qualities, wherein the signal of the sensor is used for adapting the gas-air mixture to different gas qualities at selected points in time.
2. A control method for gas burners according to claim 1, wherein the signal is used after the installation of the sensor for adapting the gas-air mixture to different gas qualities.
3. A control method for gas burners according to claim 1, wherein the signal is used after a fresh start of the gas burner for adapting the gas-air mixture to different gas qualities.
4. A control method for gas burners according to claim 1, wherein the signal is used after a reset for adapting the gas-air mixture to different gas qualities.
5. A control method for gas burners according to claim 2, wherein the signal is used when stable operating conditions of the gas burner have been reached.
6. A control method for gas burners according to claim 3, wherein the signal is used when stable operating conditions of the gas burner have been reached.
7. A control method for gas burners according to claim 4, wherein the signal is used when stable operating conditions of the gas burner have been reached.
8. A control method for gas burners according to claim 1 wherein the composition ratio of the gas-air mixture has a predetermined range with an upper and lower limit, wherein if the composition ratio exceeds said range, the upper limit and lower limit are used to determine a subsequent composition ratio of the gas-air mixture.
US10/069,749 2000-06-19 2001-05-19 Regulation method for gas burners Abandoned US20020172902A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10030063A DE10030063C2 (en) 2000-06-19 2000-06-19 Control procedures for gas burners
DE100-30-063.4 2000-06-19

Publications (1)

Publication Number Publication Date
US20020172902A1 true US20020172902A1 (en) 2002-11-21

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ID=7646201

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US10/069,749 Abandoned US20020172902A1 (en) 2000-06-19 2001-05-19 Regulation method for gas burners

Country Status (8)

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US (1) US20020172902A1 (en)
EP (1) EP1309821B1 (en)
JP (1) JP2004501337A (en)
KR (1) KR20020032547A (en)
AT (1) ATE292264T1 (en)
DE (2) DE10030063C2 (en)
ES (1) ES2239146T3 (en)
WO (1) WO2001098711A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050100844A1 (en) * 2003-09-09 2005-05-12 Piet Blaauwwiekel Gas burner control approach
US20100323292A1 (en) * 2007-03-16 2010-12-23 Jsr Corporation Resist pattern formation method, and resin composition capable of insolubilizing resist pattern
WO2018215527A1 (en) * 2017-05-24 2018-11-29 Bosch Termotecnologia S.A. Heating device and method for operating a heating device

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Publication number Priority date Publication date Assignee Title
ES2376312T3 (en) * 2003-10-08 2012-03-12 Vaillant Gmbh PROCEDURE FOR THE REGULATION OF A GAS BURNER, PARTICULARLY IN HEATING FACILITIES WITH FAN.
DE10348159B4 (en) * 2003-10-13 2011-12-08 Gaswärme-Institut e.V. Essen burner arrangement
DE102004051270A1 (en) * 2004-10-21 2006-04-27 G. Kromschröder AG Method and device for calibrating a calorific value device
DE102006051883B4 (en) * 2006-10-31 2015-02-12 Gas- und Wärme-Institut Essen e.V. Apparatus and method for adjusting, controlling or regulating the fuel / combustion air ratio for operating a burner
DE102010004826A1 (en) * 2010-01-15 2011-07-21 Honeywell Technologies S.A.R.L. Method for operating a gas burner
DE102010044762A1 (en) * 2010-09-08 2012-03-08 Honeywell Technologies S.A.R.L. Device for calibrating a gas burner control
EP2631541B1 (en) 2012-02-27 2018-04-11 Honeywell Technologies Sarl Method for operating a gas burner
EP2667097B1 (en) 2012-05-24 2018-03-07 Honeywell Technologies Sarl Method for operating a gas burner

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US3920399A (en) * 1973-01-19 1975-11-18 Georg Michael Meyer Process and apparatus for the start-up of an installation for the production of inert gases
US4118172A (en) * 1976-10-20 1978-10-03 Battelle Development Corporation Method and apparatus for controlling burner stoichiometry
US5203687A (en) * 1990-08-27 1993-04-20 Toyotomi Co., Ltd. Control system for burner
US5236328A (en) * 1992-09-21 1993-08-17 Honeywell Inc. Optical flame detector performance tester
US5589627A (en) * 1994-02-02 1996-12-31 British Gas Plc Sensor fault detection
US5812061A (en) * 1997-02-18 1998-09-22 Honeywell Inc. Sensor condition indicating system
US5924859A (en) * 1995-10-25 1999-07-20 Stiebel Eltron Gmbh & Co.Kg Process and circuit for controlling a gas burner

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DE3526384A1 (en) * 1985-07-24 1987-02-12 Bieler & Lang Gmbh METHOD AND ARRANGEMENT FOR FINE REGULATING THE FUEL QUANTITY CURRENT IN BURNER-OPERATED COMBUSTION PLANTS BY MEASURING THE RESIDUAL OXYGEN AND THE CARBON MONOXIDE CONTENT IN THE EXHAUST GAS
FR2638819A1 (en) * 1988-11-10 1990-05-11 Vaillant Sarl METHOD AND DEVICE FOR PREPARING A COMBUSTIBLE-AIR MIXTURE FOR COMBUSTION
DE59306401D1 (en) * 1993-03-11 1997-06-12 Landis & Gyr Tech Innovat Burner controller
DE19618573C1 (en) * 1996-05-09 1997-06-26 Stiebel Eltron Gmbh & Co Kg Gas burner regulating method controlled by ionisation electrode signal
DE19622126C2 (en) * 1996-06-01 2003-01-16 Webasto Thermosysteme Gmbh Method for ignition and / or flame monitoring in a vehicle heater
DE19639487A1 (en) * 1996-09-26 1998-04-09 Honeywell Bv Method and device for optimizing the operation of a gas burner

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3920399A (en) * 1973-01-19 1975-11-18 Georg Michael Meyer Process and apparatus for the start-up of an installation for the production of inert gases
US4118172A (en) * 1976-10-20 1978-10-03 Battelle Development Corporation Method and apparatus for controlling burner stoichiometry
US5203687A (en) * 1990-08-27 1993-04-20 Toyotomi Co., Ltd. Control system for burner
US5236328A (en) * 1992-09-21 1993-08-17 Honeywell Inc. Optical flame detector performance tester
US5589627A (en) * 1994-02-02 1996-12-31 British Gas Plc Sensor fault detection
US5924859A (en) * 1995-10-25 1999-07-20 Stiebel Eltron Gmbh & Co.Kg Process and circuit for controlling a gas burner
US5812061A (en) * 1997-02-18 1998-09-22 Honeywell Inc. Sensor condition indicating system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050100844A1 (en) * 2003-09-09 2005-05-12 Piet Blaauwwiekel Gas burner control approach
US20100323292A1 (en) * 2007-03-16 2010-12-23 Jsr Corporation Resist pattern formation method, and resin composition capable of insolubilizing resist pattern
WO2018215527A1 (en) * 2017-05-24 2018-11-29 Bosch Termotecnologia S.A. Heating device and method for operating a heating device

Also Published As

Publication number Publication date
KR20020032547A (en) 2002-05-03
ATE292264T1 (en) 2005-04-15
DE10030063C2 (en) 2003-03-20
EP1309821B1 (en) 2005-03-30
DE10030063A1 (en) 2002-01-31
EP1309821A1 (en) 2003-05-14
WO2001098711A1 (en) 2001-12-27
DE50105788D1 (en) 2005-05-04
JP2004501337A (en) 2004-01-15
ES2239146T3 (en) 2005-09-16

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