EP0450173A1 - Vorrichtung zur Gemischregelung bei vormischenden Gasbrennern - Google Patents

Vorrichtung zur Gemischregelung bei vormischenden Gasbrennern Download PDF

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Publication number
EP0450173A1
EP0450173A1 EP90124419A EP90124419A EP0450173A1 EP 0450173 A1 EP0450173 A1 EP 0450173A1 EP 90124419 A EP90124419 A EP 90124419A EP 90124419 A EP90124419 A EP 90124419A EP 0450173 A1 EP0450173 A1 EP 0450173A1
Authority
EP
European Patent Office
Prior art keywords
gas
pressure
throttle
air
pressure regulator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP90124419A
Other languages
German (de)
English (en)
French (fr)
Inventor
Jürgen Dr. Rolker
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.)
Electrowatt Technology Innovation AG
Original Assignee
Landis and Gyr Betriebs AG
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 Landis and Gyr Betriebs AG filed Critical Landis and Gyr Betriebs AG
Publication of EP0450173A1 publication Critical patent/EP0450173A1/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/02—Regulating fuel supply conjointly with air supply
    • F23N1/027—Regulating fuel supply conjointly with air supply using mechanical 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
    • F23N2005/181—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel using detectors sensitive to rate of flow of air
    • 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
    • F23N2005/185—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel using detectors sensitive to rate of flow of fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/04—Measuring pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/04—Measuring pressure
    • F23N2225/06—Measuring pressure for determining flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/02—Air or combustion gas valves or dampers
    • F23N2235/06—Air or combustion gas valves or dampers at the air intake
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/16—Fuel valves variable flow or proportional valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/18—Groups of two or more valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/20—Membrane valves

Definitions

  • the invention relates to a device for mixture control of the type mentioned in the preamble of claim 1.
  • Such devices are advantageously used in gas burners in which a pressure difference between the combustion chamber and the atmosphere is generated by means of a fan.
  • the blower can be arranged in the supply air or exhaust air line or directly in front of the burner.
  • a device of the type mentioned in the preamble of claim 1 is known from EP-OS 0 275 568.
  • a gas pressure regulator is used for the mixture control, which is controlled by a differential pressure signal, which is taken from a panel in the combustion air line.
  • the measuring element in the air line generates additional pressure loss, which is why a correspondingly stronger fan must be used.
  • Two control lines are also required to transmit the differential pressure signal to the gas pressure regulator.
  • either the diameter of the throttle in the gas output or in the air line must be adjusted or the area ratio of the membranes loaded with gas and air must be changed.
  • the invention has for its object to provide a device in which instead of two control lines between the air supply line and pressure regulator only a single control line is necessary and in which a measuring throttle in the air supply line can be dispensed with.
  • a premixing gas burner 1 according to FIG. 1 is connected to an inlet air line 2 and an exhaust gas line 3.
  • the air required for combustion is taken from an intake line 4 and fed to the supply air line 2 by a fan 5.
  • a fan 5 Via an air throttle 6, the air flows into a mixing chamber 7, which is followed by a distribution chamber 8, in which the air-gas mixture is fed to a surface burner 9.
  • a combustion chamber 10 In the direction of flow behind this surface burner 9 there is a combustion chamber 10 in which a heat exchanger 11 is located.
  • the fuel gas is fed from a gas line 13 to the mixing chamber 7 via a throttle element 12.
  • the pressure in the gas line 13 is regulated by a gas pressure regulator 14 which has an input space 15 to which a shut-off valve 16 is connected.
  • the gas pressure regulator 14 comprises an output space 17, a target pressure chamber 18 and an actual pressure chamber 19.
  • a pre-pressure compensation membrane 20 separates the input space 15 from the actual pressure chamber 19 and a working membrane 21 separates the actual pressure chamber 19 from the target pressure chamber 18.
  • the target pressure chamber 18 stands Via a control line 22 in connection with the supply air line 2 and a return line 23 connects the outlet space 17 with the actual pressure chamber 19.
  • the invention is based on the knowledge that the ratio of the air volume flow V L to the gas volume flow V G does not change if the ratio of the pressure difference p G -p M acting via the throttle element 12 to the pressure difference p L -p M acting via the air throttle 6 does not change. Since the volume flows V L and V G both flow into the same space, namely into the mixing space 7, the pressure differences p G -p M and p L -p M are only the same if the gas pressure p G is equal to the air pressure p L is. This condition is met by the gas pressure regulator 14, on the working membrane 21 of which the gas pressure p G is compared with the air pressure p L , which represents the reference variable. If the gas pressure p G deviates from the air pressure p L , the actuator of the gas pressure regulator 14 is moved through the working membrane 21 so that the difference p G -p L approaches zero. The gas pressure regulator 14 is therefore a constant pressure regulator.
  • the ratio of the air volume flow V L to the gas volume flow V G does not change in such an arrangement even if the pressure p M in the mixing chamber 7 varies as a result of different resistance of the surface burner 9 or the exhaust pipe 3 or because of changes in the heating surfaces of the heat exchanger 11.
  • the throttle element 12 In order to make the ratio of the gas volume flow V G to the air volume flow V L adjustable, for example with regard to different calorific values or Wobbe indices of the gas coming for combustion, it is advantageous to divide the throttle element 12 according to FIG. 2 into a series connection of a fixed one Throttle 12a with an adjustable throttle 12b. It is further advantageous to integrate the adjustable throttle 12b in the gas pressure regulator 14 so that the gas pressure regulator 14 and the adjustable throttle 12b form a structural unit.
  • FIG. 3 shows a further advantageous embodiment, namely of the type that the fixed throttle 12a (FIG. 2) and the air throttle 6 (FIG. 2) are arranged directly in the mixing chamber 7 and form a structural unit together with the mixing chamber 7.
  • the fixed throttle 12a is formed by bores 30 in a wall 31 of the mixing chamber 7, while the air throttle 6 is formed by a disk 32 adjacent to a wall 31 of the mixing chamber 7 with a plurality of bores 33 in the edge region of the disk 32.
  • the bores 33 are expediently opposite the Bores 30 offset in the middle of the gap.
  • throttles 40, 41, 43 form a structural unit with the gas pressure regulator 14. This makes it possible to be able to make optimal presettings at the factory.

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)
EP90124419A 1990-04-04 1990-12-17 Vorrichtung zur Gemischregelung bei vormischenden Gasbrennern Withdrawn EP0450173A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1140/90 1990-04-04
CH1140/90A CH680749A5 (zh) 1990-04-04 1990-04-04

Publications (1)

Publication Number Publication Date
EP0450173A1 true EP0450173A1 (de) 1991-10-09

Family

ID=4203427

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90124419A Withdrawn EP0450173A1 (de) 1990-04-04 1990-12-17 Vorrichtung zur Gemischregelung bei vormischenden Gasbrennern

Country Status (2)

Country Link
EP (1) EP0450173A1 (zh)
CH (1) CH680749A5 (zh)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0578578A1 (en) * 1992-07-10 1994-01-12 Selas Corporation Of America Apparatus and method for mixing gases
EP0626541A1 (en) * 1993-05-28 1994-11-30 Ranco Incorporated Of Delaware Gas/air ratio control apparatus for a temperature control loop for gas appliances
EP0724117A1 (de) * 1995-01-30 1996-07-31 Landis & Gyr Technology Innovation AG Regelvorrichtung für einen Gasgebläsebrenner
EP0801270A2 (en) * 1996-04-10 1997-10-15 ZELTRON S.p.A. Gas fuelled heating unit for household and similar appliances
EP0887590A1 (fr) * 1997-06-27 1998-12-30 Compagnie Europeenne Pour L'equipement Menager "Cepem" Brûleur à gaz à prémélange total pour cuisson domestique
DE19859283A1 (de) * 1998-12-22 2000-07-06 Bosch Gmbh Robert Verfahren zum Mischen von Gas und Luft für einen mit einem Gas-Luftgemisch gespeisten Brenner und eine Vorrichtung zur Durchführung des Verfahrens
WO2005024302A1 (en) * 2003-09-08 2005-03-17 Sit La Precisa S.P.A. A system for controlling the delivery of a fuel gas to a burner apparatus
EP1584870A2 (de) * 2004-04-08 2005-10-12 Karl Dungs GmbH & Co.KG Gasventilanordnung mit Verzögerter Gasfreigabe
US20140124587A1 (en) * 2012-11-05 2014-05-08 Pat Caruso Modulating burner system
CN110582673A (zh) * 2018-03-07 2019-12-17 依必安派特兰茨胡特有限公司 用于在燃气运行的加热器的启动过程中识别燃气种类的方法和燃气运行的加热器
EP3957910A1 (de) * 2020-08-18 2022-02-23 Vaillant GmbH Verfahren und anordnung zur pneumatischen gemischbildung bei einem vormischbrenner
US11287131B2 (en) * 2018-08-28 2022-03-29 Ademco Inc. Method for operating a gas burner appliance
DE102020132504A1 (de) 2020-12-07 2022-06-09 Ebm-Papst Landshut Gmbh Drosselanordnung
WO2022183429A1 (en) * 2021-03-04 2022-09-09 Pittway Sarl Partially-premixed gas burner appliance
EP4170235A1 (de) * 2021-10-20 2023-04-26 ebm-papst Landshut GmbH Verfahren zur auswertung einer von einem sensor erfassbaren instationären druckdifferenz an einer gastherme sowie zugehörige gastherme
EP4174373A1 (de) * 2021-10-27 2023-05-03 Vaillant GmbH Verfahren zur inbetriebnahme eines heizgerätes, heizgerät, computerprogramm und ma-schinenlesbares speichermedium
EP4191135A1 (en) * 2021-12-02 2023-06-07 Bosch Thermotechnology Ltd (UK) An air-gas mixing unit for an air-gas mixture burning appliance

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1405093A (en) * 1971-09-18 1975-09-03 Stordy Combustion Eng Ltd Control of fuel supply to a burner
GB1507020A (en) * 1975-05-06 1978-04-12 British Gas Corp Apparatus for the control of gas/air flow ratio in a burner system
GB2018970A (en) * 1978-04-17 1979-10-24 Matsushita Electric Ind Co Ltd Combustion control apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1405093A (en) * 1971-09-18 1975-09-03 Stordy Combustion Eng Ltd Control of fuel supply to a burner
GB1507020A (en) * 1975-05-06 1978-04-12 British Gas Corp Apparatus for the control of gas/air flow ratio in a burner system
GB2018970A (en) * 1978-04-17 1979-10-24 Matsushita Electric Ind Co Ltd Combustion control apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
GAS W[RME INTERNATIONAL, vol. 37, no. 10, November 1988, Seiten 5516 - 563; (J. ROLKER): "]berwachung und Regelung von Industriegasbrennern" *

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0578578A1 (en) * 1992-07-10 1994-01-12 Selas Corporation Of America Apparatus and method for mixing gases
EP0626541A1 (en) * 1993-05-28 1994-11-30 Ranco Incorporated Of Delaware Gas/air ratio control apparatus for a temperature control loop for gas appliances
US5630408A (en) * 1993-05-28 1997-05-20 Ranco Incorporated Of Delaware Gas/air ratio control apparatus for a temperature control loop for gas appliances
EP0724117A1 (de) * 1995-01-30 1996-07-31 Landis & Gyr Technology Innovation AG Regelvorrichtung für einen Gasgebläsebrenner
EP0801270A2 (en) * 1996-04-10 1997-10-15 ZELTRON S.p.A. Gas fuelled heating unit for household and similar appliances
EP0801270A3 (en) * 1996-04-10 1999-10-27 ZELTRON S.p.A. Gas fuelled heating unit for household and similar appliances
EP0887590A1 (fr) * 1997-06-27 1998-12-30 Compagnie Europeenne Pour L'equipement Menager "Cepem" Brûleur à gaz à prémélange total pour cuisson domestique
FR2765313A1 (fr) * 1997-06-27 1998-12-31 Europ Equip Menager Bruleur a gaz a premelange total pour cuisson domestique
DE19859283A1 (de) * 1998-12-22 2000-07-06 Bosch Gmbh Robert Verfahren zum Mischen von Gas und Luft für einen mit einem Gas-Luftgemisch gespeisten Brenner und eine Vorrichtung zur Durchführung des Verfahrens
DE19859283C2 (de) * 1998-12-22 2001-02-15 Bosch Gmbh Robert Vorrichtung zum Mischen von Gas und Luft für einen Brenner
WO2005024302A1 (en) * 2003-09-08 2005-03-17 Sit La Precisa S.P.A. A system for controlling the delivery of a fuel gas to a burner apparatus
EP1584870A3 (de) * 2004-04-08 2008-04-30 Karl Dungs GmbH & Co.KG Gasventilanordnung mit Verzögerter Gasfreigabe
EP1584870A2 (de) * 2004-04-08 2005-10-12 Karl Dungs GmbH & Co.KG Gasventilanordnung mit Verzögerter Gasfreigabe
US20140124587A1 (en) * 2012-11-05 2014-05-08 Pat Caruso Modulating burner system
US9528712B2 (en) * 2012-11-05 2016-12-27 Pat Caruso Modulating burner system
CN110582673A (zh) * 2018-03-07 2019-12-17 依必安派特兰茨胡特有限公司 用于在燃气运行的加热器的启动过程中识别燃气种类的方法和燃气运行的加热器
US11287131B2 (en) * 2018-08-28 2022-03-29 Ademco Inc. Method for operating a gas burner appliance
EP3957910A1 (de) * 2020-08-18 2022-02-23 Vaillant GmbH Verfahren und anordnung zur pneumatischen gemischbildung bei einem vormischbrenner
DE102020132504A1 (de) 2020-12-07 2022-06-09 Ebm-Papst Landshut Gmbh Drosselanordnung
WO2022122279A1 (de) 2020-12-07 2022-06-16 Ebm-Papst Landshut Gmbh Drosselanordnung, heizgerät mit der drosselanordnung, verfahren zur regelung eines heizgeräts mit der drosselanordnung, und blendenmessstrecke mit der drosselanordnung
WO2022183429A1 (en) * 2021-03-04 2022-09-09 Pittway Sarl Partially-premixed gas burner appliance
EP4170235A1 (de) * 2021-10-20 2023-04-26 ebm-papst Landshut GmbH Verfahren zur auswertung einer von einem sensor erfassbaren instationären druckdifferenz an einer gastherme sowie zugehörige gastherme
EP4174373A1 (de) * 2021-10-27 2023-05-03 Vaillant GmbH Verfahren zur inbetriebnahme eines heizgerätes, heizgerät, computerprogramm und ma-schinenlesbares speichermedium
EP4191135A1 (en) * 2021-12-02 2023-06-07 Bosch Thermotechnology Ltd (UK) An air-gas mixing unit for an air-gas mixture burning appliance

Also Published As

Publication number Publication date
CH680749A5 (zh) 1992-10-30

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