EP0890787B1 - Dispositif de mélange pour gaz et comburant dans une installation de combustion - Google Patents

Dispositif de mélange pour gaz et comburant dans une installation de combustion Download PDF

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Publication number
EP0890787B1
EP0890787B1 EP98112104A EP98112104A EP0890787B1 EP 0890787 B1 EP0890787 B1 EP 0890787B1 EP 98112104 A EP98112104 A EP 98112104A EP 98112104 A EP98112104 A EP 98112104A EP 0890787 B1 EP0890787 B1 EP 0890787B1
Authority
EP
European Patent Office
Prior art keywords
venturi
gas
mixing device
flow restrictor
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.)
Expired - Lifetime
Application number
EP98112104A
Other languages
German (de)
English (en)
Other versions
EP0890787A3 (fr
EP0890787A2 (fr
Inventor
Enno Vrolijk
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.)
Honeywell BV
Original Assignee
Honeywell BV
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 Honeywell BV filed Critical Honeywell BV
Publication of EP0890787A2 publication Critical patent/EP0890787A2/fr
Publication of EP0890787A3 publication Critical patent/EP0890787A3/fr
Application granted granted Critical
Publication of EP0890787B1 publication Critical patent/EP0890787B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F23D14/62—Mixing devices; Mixing tubes

Definitions

  • the invention relates to a mixing device for producing a mixture of gas and Combustion air for a burner according to the preamble of claim 1.
  • Such a mixing device is also known from US Pat. No. 5,527,367 A and also essentially known from EP 0 559 280 A1 and EP 0 702 194 A1.
  • EP 0 559 280 A1 the control body lies in the flow path of the gas / air mixture and is equipped with an additional element that controls the gas flow.
  • EP 0 702 194 A1 it each has one in the flow path of the combustion air and the gas lying on the valve body. So in both cases it is as Double throttle body designed.
  • a gas burner with any flame direction is known from DE-OS 19 06 652. This has a mixing tube which widens conically downstream, in which from an annular chamber with air flowing into the annular gap can be sucked in air.
  • the object of the invention is to provide a generic mixing device which an extremely simple construction has a high efficiency.
  • the mixing device characterized in claim 1.
  • the modulation range for feeding the Gas / air mixture depending on the heat requirement i.e. the difference between minimum and maximum mixture throughput broadened because the venturi nozzle in the flow generated by the blower the pressure difference via venturi and Throttle body reinforced.
  • the flow resistance changes depending on the Throughput such that the throttle body is already a relative at low flows high flow resistance and a relatively low flow rate Has flow resistance.
  • the pressure difference generated by the fan is at low throughput high. This results in high stability with low throughput as well as a low likelihood of burner noise different environmental conditions.
  • the formation of the mixing device is from the arrangement of the fan largely independent. It can by airflow or the mixture flow or be arranged at the outlet of the combustion chamber.
  • the outlet funnel 2 of a Venturi nozzle is sealed, the is surrounded on the outside by an annular chamber 3.
  • This annular chamber 3 is formed between an essentially hollow cylindrical housing part 4 and the outer wall of the Exhaust funnel 2.
  • the housing part 4 is also attached sealed to the support plate 1 and at its opposite end 5 as an inflow funnel 6 of the Venturi nozzle designed.
  • the annular chamber 3 is above the interior 7 of the venturi nozzle circumferential annular gap 8 in connection.
  • a throttle body 9 is vertical in the standing and upwardly open outlet funnel 2 freely floating axially. The respective position of the throttle body 9 is determined by the balance of forces, which results from the differential pressure generated by the flow at the throttle body 9 on the one hand and the throttle body weight on the other.
  • the contiguous Parts of outlet funnel 2 and inflow funnel 6 together form the nozzle neck 10 of the Venturi nozzle.
  • Combustion air A is fed to the inflow funnel 6, while the gas G via a Pre-throttle 11 passes from the inlet 12 into the annular chamber 3 and from there through the Annular gap 8 is sucked through by the air stream A.
  • the gas G flows in the area of the Nozzle neck 10 approximately tangential to the air flow A in flowing through the Venturi nozzle the nozzle, which on the one hand leads to a good mixing of gas and air, on the other hand, it does not adversely affect the reinforcing effect of the venturi nozzle.
  • the degree of gain of the Venturi nozzle is defined as the ratio of the pressure difference the Venturi nozzle, measured between the inlet on the inflow funnel 6 and the gas supply point at the annular gap 8, and the pressure drop which the Venturi nozzle in the main stream, that is in the air flow.
  • the mixture M of combustion air A and gas G leaves the venturi nozzle at its outlet 13.
  • the throttle body 9 is replaced by the Mixture flow kept floating and centered because of any radial shifts of the throttle body 9 to different pressure drops in the annular gap 14 between Throttle body 9 and outlet funnel 2 lead and thereby a radial displacement in the central location.
  • the throttle body 9 by Guide means 15 can be guided displaceably in the axial direction.
  • limiting means 16 the axial stroke of the Limit throttle body 9 in one or both directions.
  • a blower which is either on the supply side A of the air or on the downstream side M of the mixture or downstream thereof at the outlet of the Combustion chamber can be arranged, a flow in the direction of arrows A and M. generated, which depends on the current blower output (speed).
  • speed the current blower output
  • the throttle body 9 With low heat requirements and consequently low flow is the throttle body 9, for example in the extended shown position where the annular gap 14 between the throttle body 9 and the outlet funnel 2nd relatively low and consequently the flow resistance and thus also the pressure drop the throttle body 9 is relatively high.
  • Throttle body 9 When there is a high demand for heat, the moves Throttle body 9 in the direction of the dashed position 9 ', where the annular gap 14 is larger and thus the flow resistance is lower. This leads to the one described above Stabilization of the flow in the area of low throughput.
  • the gas supply With the pre-throttle 11 the gas supply is divided so that air and gas in a predetermined, optimal burning mixture ratio reach the burner. This gas / air ratio remains at all positions of the throttle body 9, i.e. same with changes in throughput.
  • the guide means 15 may, for example, consist of a plurality of axially extending ribs, which are distributed uniformly over the circumference of the inner wall of the outlet funnel 2 and, as indicated by dashed lines, can at the same time form a stop at their lower end as a stroke limiting means 16 for the throttle body 9.
  • Such guide means can also be useful with the vertical nozzle axis as shown.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)

Claims (6)

  1. Dispositif mélangeur pour du gaz et de l'air de combustion dans une installation à brûleur, dans lequel une soufflante transporte le mélange gaz / air au brûleur, et pour lequel
    a) un venturi (2, 6, 10) est prévu pour le mélange de l'air et du gaz (G), le gaz (G) s'écoulant vers le venturi (2, 6, 10) depuis une entrée (12) et étant aspiré tangentiellement dans le courant d'air (A) traversant le venturi dans le col (10) de ce dernier, depuis une chambre annulaire (3) entourant une partie du venturi ;
    b) dans la tuyère de sortie (2) du venturi (2, 6) est disposé un seul élément d'étranglement (9), déplaçable axialement et sans organe de réglage spécifique, dont la position axiale est déterminée par la différence de pression engendrée par la soufflante entre la tuyère d'arrivée du courant (6) et la sortie (13) du venturi, et
    c) un étranglement amont (11) est disposé entre l'entrée (12) et la chambre annulaire (3), à l'aide duquel l'arrivée de gaz est réglée de telle sorte que le rapport gaz / air reste le même pour toutes les positions de l'élément d'étranglement (9) et correspond à un rapport déterminé.
  2. Dispositif mélangeur selon la revendication 1, avec un venturi vertical évasé vers le haut, caractérisé en ce que l'élément d'étranglement (9) est disposé axialement flottant dans la tuyère de sortie (2) du venturi.
  3. Dispositif mélangeur selon la revendication 1, caractérisé par un ressort de précontrainte de l'élément d'étranglement dans le sens de la fermeture.
  4. Dispositif mélangeur selon une des revendications 1 à 3, caractérisé par des moyens de guidage radiaux (15) pour un guidage concentrique de l'élément d'étranglement (9) dans la direction de l'axe.
  5. Dispositif mélangeur selon une des revendications 1 à 4, caractérisé par des moyens de limitation de course (16) pour l'élément d'étranglement (9).
  6. Dispositif mélangeur selon une des revendications 1 à 5, caractérisé en ce que la chambre annulaire (3) débouche dans le col (10) par une fente annulaire (8) entourant le col.
EP98112104A 1997-07-08 1998-07-01 Dispositif de mélange pour gaz et comburant dans une installation de combustion Expired - Lifetime EP0890787B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19729047 1997-07-08
DE19729047A DE19729047C1 (de) 1997-07-08 1997-07-08 Mischvorrichtung zur Erzeugung eines Gemisches aus Gas und Verbrennungsluft für einen Brenner

Publications (3)

Publication Number Publication Date
EP0890787A2 EP0890787A2 (fr) 1999-01-13
EP0890787A3 EP0890787A3 (fr) 1999-02-10
EP0890787B1 true EP0890787B1 (fr) 2002-11-13

Family

ID=7834947

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98112104A Expired - Lifetime EP0890787B1 (fr) 1997-07-08 1998-07-01 Dispositif de mélange pour gaz et comburant dans une installation de combustion

Country Status (2)

Country Link
EP (1) EP0890787B1 (fr)
DE (2) DE19729047C1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009019938A1 (de) 2009-05-05 2010-12-09 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Mischvorrichtung für Fluide und deren Verwendung sowie Mischverfahren
US8512035B2 (en) 2010-03-09 2013-08-20 Honeywell Technologies Sarl Mixing device for a gas burner
US8668491B2 (en) 2009-10-06 2014-03-11 Honeywell Technologies Sarl Regulating device for gas burners

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1035376A1 (fr) 1999-03-10 2000-09-13 Wolf GmbH Clapet anti-retour pour chauffe-eau à gaz
US6381534B2 (en) * 2000-02-14 2002-04-30 Fujitsu Limited Navigation information presenting apparatus and method thereof
US20020006591A1 (en) * 2000-07-07 2002-01-17 Hugens John R. Method and apparatus for mixing combustion gases
DE10324706B3 (de) * 2003-05-30 2004-12-02 Hovalwerk Ag Vorrichtung zum Regeln des Gas/Luft-Verhältnisses für eine vormischende Verbrennungseinrichtung
DE102004007123B3 (de) * 2004-02-12 2005-08-18 Honeywell B.V. Mischvorrichtung zum Mischen von Gas und Verbrennungsluft für einen Gasbrenner sowie Gasbrenner
DE102004054796B3 (de) 2004-11-12 2006-03-16 Robert Bosch Gmbh Mischeinrichtung für einen Gas-Vormischbrenner
US7832212B2 (en) * 2006-11-10 2010-11-16 General Electric Company High expansion fuel injection slot jet and method for enhancing mixing in premixing devices
DE102007004969A1 (de) 2007-01-26 2008-07-31 Viessmann Werke Gmbh & Co Kg Mischeinrichtung für einen Gasgebläsebrenner
EP2048439B1 (fr) 2007-10-12 2014-06-18 ebm-papst Landshut GmbH Ventilateur doté d'une soupape de régulation intégrée
FR2936040B1 (fr) * 2008-09-18 2010-08-27 Guillot Ind Sa Melangeur pour chaudiere
DE102009024269A1 (de) * 2009-06-05 2010-12-09 Honeywell Technologies S.A.R.L. Mischvorrichtung für einen Gasbrenner
DE202010018511U1 (de) * 2010-03-10 2017-03-24 Ebm-Papst Landshut Gmbh Pneumatischer Verbund mit Massenausgleich
DE102010044591A1 (de) * 2010-09-07 2012-03-08 Honeywell Technologies Sarl Gasregelgerät mit angebauter Venturi-Düse
DE102011014117A1 (de) * 2011-03-15 2012-09-20 Ebm-Papst Landshut Gmbh Mischvorrichtung zur Mischung von Verbrennungsluft und Gas für ein Gasgerät
ITPD20110372A1 (it) * 2011-11-24 2013-05-25 Ln 2 Srl Socio Unico Dispositivo miscelatore aria-gas per bruciatori a gas combustibile con pre-miscelazione
ITPD20110373A1 (it) * 2011-11-24 2013-05-25 Ln 2 Srl Socio Unico Dispositivo miscelatore aria-gas per bruciatori a gas combustibile con pre-miscelazione
DE102012003501A1 (de) * 2012-01-31 2013-08-01 Vaillant Gmbh Brenngas-Luft-Mischvorrichtung
CN103574612A (zh) * 2012-07-31 2014-02-12 樱花卫厨（中国）股份有限公司 全预混燃烧系统用混气装置
DE102013220952A1 (de) * 2013-10-16 2015-04-16 Robert Bosch Gmbh Heizgerät mit einem von einem Gebläse unterstützten Brenner
DE102013220950A1 (de) * 2013-10-16 2015-04-16 Robert Bosch Gmbh Heizgerät mit einem von einem Gebläse unterstützten Brenner
US9746176B2 (en) 2014-06-04 2017-08-29 Lochinvar, Llc Modulating burner with venturi damper
JP6189795B2 (ja) * 2014-06-04 2017-08-30 リンナイ株式会社 予混合装置
JP6608749B2 (ja) * 2016-03-28 2019-11-20 リンナイ株式会社 予混合装置
DE102016112103B4 (de) 2016-07-01 2019-08-22 Thomas Kirchhöfer Hochtemperaturofen mit Wärmerückgewinnung
CN109838786B (zh) * 2017-11-28 2024-03-29 芜湖美的厨卫电器制造有限公司 燃气混合装置及燃气热水器
CN111207393A (zh) * 2018-11-22 2020-05-29 芜湖美的厨卫电器制造有限公司 燃气预混器及具有其的燃气设备
DE102019109369A1 (de) * 2019-04-09 2020-10-15 Ebm-Papst Landshut Gmbh Adaptervorrichtung ausgeführt zur befestigten Anordnung an einer Ansaugöffnung eines Gasgebläses
EP4189228A1 (fr) 2020-07-28 2023-06-07 Cummins, Inc. Mélangeur air-carburant gazeux à uniformité de mélange plus élevée

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1906652A1 (de) * 1969-02-11 1970-08-20 Hans Maile Atmosphaerischer Gasbrenner fuer beliebige Leistungen mit beliebiger Flammenrichtung,insbesondere horizontalbrennend
EP0145920B1 (fr) * 1983-11-03 1990-02-07 KAT-TEC Gesellschaft für Katalysatortechnik mbH Dispositif de combustion
DE4137573C2 (de) * 1991-11-15 1998-01-15 Motoren Werke Mannheim Ag Venturi-Mischer zum Mischen von Gas und Luft, insbesondere für einen Verbrennungsmotor
NL9200426A (nl) * 1992-03-06 1993-10-01 Atag Verwarming Bv Gasdoseerinrichting.
JP3343632B2 (ja) * 1993-12-03 2002-11-11 株式会社ニッキ ガス・エンジン用混合器
EP0702194B1 (fr) * 1994-09-07 1998-11-04 Honeywell B.V. Soupape combinée gaz/air pour brûleur
DE29617621U1 (de) * 1995-11-14 1997-08-28 Honeywell B.V., Amsterdam Mischvorrichtung mit Venturi-Düse

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009019938A1 (de) 2009-05-05 2010-12-09 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Mischvorrichtung für Fluide und deren Verwendung sowie Mischverfahren
DE102009019938B4 (de) * 2009-05-05 2015-08-27 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Mischvorrichtung für Fluide und deren Verwendung sowie Mischverfahren
US8668491B2 (en) 2009-10-06 2014-03-11 Honeywell Technologies Sarl Regulating device for gas burners
US8512035B2 (en) 2010-03-09 2013-08-20 Honeywell Technologies Sarl Mixing device for a gas burner

Also Published As

Publication number Publication date
EP0890787A3 (fr) 1999-02-10
DE19729047C1 (de) 1998-09-24
DE59806246D1 (de) 2002-12-19
EP0890787A2 (fr) 1999-01-13

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