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EP2664849A2 - Dispositif de mélange air-gaz combustible - Google Patents

Dispositif de mélange air-gaz combustible Download PDF

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Publication number
EP2664849A2
EP2664849A2 EP13166357.7A EP13166357A EP2664849A2 EP 2664849 A2 EP2664849 A2 EP 2664849A2 EP 13166357 A EP13166357 A EP 13166357A EP 2664849 A2 EP2664849 A2 EP 2664849A2
Authority
EP
European Patent Office
Prior art keywords
flap
air
mixing device
gas supply
latch
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
EP13166357.7A
Other languages
German (de)
English (en)
Other versions
EP2664849B1 (fr
EP2664849A3 (fr
Inventor
Jochen Wriske
Matthias Wodtke
Nicole Schmidt
Gabriele Lange
Thomas Messerschmidt
Bernhard Zscheile
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vaillant GmbH
Original Assignee
Vaillant GmbH
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 Vaillant GmbH filed Critical Vaillant GmbH
Publication of EP2664849A2 publication Critical patent/EP2664849A2/fr
Publication of EP2664849A3 publication Critical patent/EP2664849A3/fr
Application granted granted Critical
Publication of EP2664849B1 publication Critical patent/EP2664849B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/60—Devices for simultaneous control of gas and combustion air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/62—Mixing devices; Mixing tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L13/00—Construction of valves or dampers for controlling air supply or draught
    • F23L13/02—Construction of valves or dampers for controlling air supply or draught pivoted about a single axis but having not other movement
    • 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
    • F23N3/00—Regulating air supply or draught
    • F23N3/02—Regulating draught by direct pressure operation of single valves or dampers

Definitions

  • the invention relates to a fuel gas-air mixing device for a heater.
  • Generic mixing devices are based on a mixing nozzle, usually a venturi nozzle, in which air is conveyed through the nozzle by means of a blower.
  • a mixing nozzle usually a venturi nozzle
  • fuel gas is supplied orthogonally.
  • a throttle in the gas path the amount of fuel gas required for clean combustion is adjusted in relation to the amount of air.
  • the venturi ensures that over a certain range of air mass flow, the fuel gas to air ratio remains constant within close tolerances.
  • the patent application DE 196 35 974 A1 describes a fuel gas-air mixing device for gas heaters, in which the opening cross section is adapted to the combustion chamber by a gravity-loaded pendulum flap depending on the volume flow.
  • the patent EP 1 183 483 B1 describes a mixing device for fuel gas and combustion air with two parallel air nozzles in the form of Venturi nozzles.
  • One or alternatively both air nozzles can be switched off by means of shut-off devices.
  • the shut-off devices are designed as flaps, wherein the flaps are held by springs against the flow direction. The spring rate thus determines the Absperr characterizing.
  • closure means which comprises the flap, is formed so that no enrichment of the fuel gas-air mixture takes place in the transition region.
  • the closure means comprises a locking means which is locked at low air mass flows and in the transition region to high mass air flows. As a result, the flap reliably remains in the closed position.
  • the locking means may be a drive such as a stepper motor.
  • the locking means may be an electromagnet. This makes it possible to control the locking means directly by means of a controller.
  • the locking means is a latch which locks the flap passively.
  • This is done by means of an aerodynamically acting body.
  • This body is provided in the air flow of the first air channel.
  • the aerodynamic effect can be caused by buoyancy or air resistance.
  • the aerodynamically acting body is designed so that the latch opens the flap only when the air mass flow is sufficiently large to open the door.
  • the flap has openings. This allows the air in the partially closed state of the flap to flow through the openings. This prevents high flow velocities occurring in the region of the second gas supply.
  • the second air duct in the region of the flap and the flap itself are shaped so that at low opening angles of the flap, the gap between the flap and the second air duct in the area outside the second gas supply opens faster than in the area of the second gas supply. This also prevents high flow velocities occurring in the region of the second gas supply.
  • the locking means is actuated depending on the rotational speed of a fan connected to the mixing device.
  • the actuation takes place in the form of a hysteresis.
  • FIGS. 1 to 3 show a sectional drawing of an embodiment of the mixing device according to the invention.
  • the mixing nozzle 1 which is designed as a Venturi nozzle.
  • the mixing nozzle 1 is divided into a first air channel 2 and a second air channel 3.
  • the second air channel 3 can be locked by a closure means 6 in the form of a flap 9.
  • the flap 9 is formed so that at the same time the second gas supply 5 can be locked.
  • the flap 9 is opened by the back pressure.
  • the second gas supply 5 is opened.
  • the flap 9 is connected via a shaft 7 with a drive 8. As a result, the flap 9 can be actively opened, so that an unwanted partial opening of the flap 9 is prevented.
  • an electromagnet 10 is shown, which cooperates with the flap 9.
  • This solenoid can be controlled so that the flap 9 is locked at low air mass flows and in the transition region. Only at sufficiently high air mass flows of the electromagnet 10, the flap 9 free, so this then opens reliably.
  • FIG. 3 shows a latch 11 which locks the flap 9 in a closed position.
  • the bolt 11 is connected to a biased by a spring latch actuator 12, which is arranged in the air flow of the first air duct 2.
  • High air mass flows cause that in this example designed as a support surface locking actuator 12 is actuated so that the latch 11, the flap 9 releases.
  • Latch 12 and flap 9 are coordinated so that the flap 9 opens reliably at this air mass flow.
  • FIG. 4 shows a sectional drawing of another embodiment of the mixing device according to the invention.
  • the flap 9 has a plurality of openings 13 through which air can flow.
  • a gap 14 is formed between the flap 9 and the second air channel 3.
  • the contours of the second air duct 3 and the outer edge of the flap 9 are designed so that at low opening angles of the flap 9, the gap opens faster outside the range of the second gas supply 5 than in the region of the second gas supply 5. This can be achieved, for example, that the second air duct in this area has no rotationally symmetrical cross section.
  • the cross section widens more outside the region of the second gas supply 5 than in the region of the second gas supply 5.
  • FIG. 5 represents a measured course of the fuel gas-air ratio over the entire power range of a heater.
  • a value of the fuel gas-air ratio greater than 1 corresponds to an excess of air, a value less than 1 corresponds to lack of air.
  • a value of 1.3 is considered optimal.
  • the measurement curve 15 was recorded with a mixing device according to the prior art. In the power range of the heater between 7 and 15 kW is a drop in the value of the fuel gas-air ratio recorded, which corresponds to an enrichment of the mixture and thus leads to higher pollutant emissions.
  • the measurement curve 16 was used with a mixing device according to the invention according to FIG. 4 added. The enrichment of the mixture can be significantly reduced here.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
EP13166357.7A 2012-05-15 2013-05-03 Dispositif de mélange air-gaz combustible Active EP2664849B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012009628A DE102012009628A1 (de) 2012-05-15 2012-05-15 Brenngas-Luft-Mischvorrichtung

Publications (3)

Publication Number Publication Date
EP2664849A2 true EP2664849A2 (fr) 2013-11-20
EP2664849A3 EP2664849A3 (fr) 2017-03-15
EP2664849B1 EP2664849B1 (fr) 2018-11-21

Family

ID=48288858

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13166357.7A Active EP2664849B1 (fr) 2012-05-15 2013-05-03 Dispositif de mélange air-gaz combustible

Country Status (4)

Country Link
EP (1) EP2664849B1 (fr)
DE (1) DE102012009628A1 (fr)
ES (1) ES2711877T3 (fr)
TR (1) TR201902325T4 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015187290A1 (fr) * 2014-06-04 2015-12-10 Lochinvar, Llc Brûleur à modulation doté d'un amortisseur venturi
WO2015191540A1 (fr) * 2014-06-09 2015-12-17 Dayco Ip Holdings, Llc Dispositifs venturi dotés de doubles trajets d'écoulement venturi
EP2918912A3 (fr) * 2014-03-14 2016-01-06 Robert Bosch Gmbh Appareil de commande, brûleur et procédé de fonctionnement d'un tel appareil de commande
EP3662989A4 (fr) * 2017-08-03 2021-09-01 Time Engineering Co., Ltd. Mélangeur de fluide
US11143399B2 (en) * 2018-05-09 2021-10-12 Paloma Co., Ltd Premixing device and combustion device
EP4056897A1 (fr) 2021-03-10 2022-09-14 BDR Thermea Group B.V. Dispositif de mélange pour un chauffage au gaz

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19635974A1 (de) 1996-09-05 1998-03-12 Stiebel Eltron Gmbh & Co Kg Gas/Luft-Mischsystem für Gasheizgeräte
EP1183483B1 (fr) 1999-06-04 2004-03-03 Honeywell B.V. Dispositif pour bruleur de gaz
WO2012007823A1 (fr) 2010-07-12 2012-01-19 Gas Point S.R.L. Brûleur à gaz à prémélange

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2678877A (en) * 1951-08-24 1954-05-18 Tallent H Ransome Apparatus for producing combustible gaseous mixtures of substantially constant pressure
DE2457567B1 (de) * 1974-12-05 1975-11-20 Wamsler Herd & Ofen Gmbh Verfahren und Vorrichtung zum Vermindern der Waermeverluste von kamingebundenen Gas-Raumheizgeraeten waehrend des Betriebs
DE2631718A1 (de) * 1975-07-28 1977-02-10 Leblanc Sa E L M Gasbeheizter warmwasserbereiter mit gasdichtem abzug
DE2656580C3 (de) * 1976-12-11 1979-10-04 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Steuereinrichtung für eine Abgassperre
US4465456A (en) * 1981-08-24 1984-08-14 Foster-Miller Inc. Variable firing rate burner
AT400075B (de) * 1991-08-06 1995-09-25 Vaillant Gmbh Verfahren zum einstellen eines mit einem brenner versehenen gasheizgerätes durch vorgabe eines gasdurchsatzes und einrichtung zum einstellen dieses gasdurchsatzes
DE19756301B4 (de) * 1996-12-16 2010-03-04 Vaillant Gmbh Einrichtung zur Aufbereitung eines Gas-Luftgemisches
DE10304364A1 (de) * 2003-02-04 2004-08-12 J. Eberspächer GmbH & Co. KG Drosselanordnung sowie Abgasanlage mit einer derartigen Drosselanordnung
DE102009058453B4 (de) * 2009-12-16 2011-09-01 Robert Bosch Gmbh Gasgebläsebrenner mit modulierbarer Brennerleistung und Verfahren zum Betreiben eines Gasgebläsebrenners

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19635974A1 (de) 1996-09-05 1998-03-12 Stiebel Eltron Gmbh & Co Kg Gas/Luft-Mischsystem für Gasheizgeräte
EP1183483B1 (fr) 1999-06-04 2004-03-03 Honeywell B.V. Dispositif pour bruleur de gaz
WO2012007823A1 (fr) 2010-07-12 2012-01-19 Gas Point S.R.L. Brûleur à gaz à prémélange

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2918912A3 (fr) * 2014-03-14 2016-01-06 Robert Bosch Gmbh Appareil de commande, brûleur et procédé de fonctionnement d'un tel appareil de commande
US9746176B2 (en) 2014-06-04 2017-08-29 Lochinvar, Llc Modulating burner with venturi damper
CN106662323B (zh) * 2014-06-04 2019-09-17 烈骑有限责任公司 具有文丘里管阻尼器的可调节燃烧器
US10161627B2 (en) 2014-06-04 2018-12-25 Lochinvar, Llc Modulating burner with venturi damper
WO2015187290A1 (fr) * 2014-06-04 2015-12-10 Lochinvar, Llc Brûleur à modulation doté d'un amortisseur venturi
CN106662323A (zh) * 2014-06-04 2017-05-10 烈骑有限责任公司 具有文丘里管阻尼器的可调节燃烧器
US9879699B2 (en) 2014-06-09 2018-01-30 Dayco Ip Holdings, Llc Venturi devices with dual Venturi flow paths
CN106907356A (zh) * 2014-06-09 2017-06-30 戴科知识产权控股有限责任公司 具有双文丘里流动路径的文丘里装置
CN105378382B (zh) * 2014-06-09 2017-04-12 戴科知识产权控股有限责任公司 具有双文丘里流动路径的文丘里装置
CN105378382A (zh) * 2014-06-09 2016-03-02 戴科知识产权控股有限责任公司 具有双文丘里流动路径的文丘里装置
WO2015191540A1 (fr) * 2014-06-09 2015-12-17 Dayco Ip Holdings, Llc Dispositifs venturi dotés de doubles trajets d'écoulement venturi
US10724550B2 (en) 2014-06-09 2020-07-28 Dayco Ip Holdings, Llc Venturi devices with dual Venturi flow paths
EP3662989A4 (fr) * 2017-08-03 2021-09-01 Time Engineering Co., Ltd. Mélangeur de fluide
US11143399B2 (en) * 2018-05-09 2021-10-12 Paloma Co., Ltd Premixing device and combustion device
EP4056897A1 (fr) 2021-03-10 2022-09-14 BDR Thermea Group B.V. Dispositif de mélange pour un chauffage au gaz
WO2022189413A1 (fr) 2021-03-10 2022-09-15 Bdr Thermea Group B.V. Dispositif mélangeur pour appareil de chauffage de gaz

Also Published As

Publication number Publication date
EP2664849B1 (fr) 2018-11-21
DE102012009628A1 (de) 2013-11-21
ES2711877T3 (es) 2019-05-08
EP2664849A3 (fr) 2017-03-15
TR201902325T4 (tr) 2019-03-21

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