EP0702194A1 - Soupape combinée gaz/air pour brûleur - Google Patents

Soupape combinée gaz/air pour brûleur Download PDF

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Publication number
EP0702194A1
EP0702194A1 EP94114019A EP94114019A EP0702194A1 EP 0702194 A1 EP0702194 A1 EP 0702194A1 EP 94114019 A EP94114019 A EP 94114019A EP 94114019 A EP94114019 A EP 94114019A EP 0702194 A1 EP0702194 A1 EP 0702194A1
Authority
EP
European Patent Office
Prior art keywords
valve
air
gas
pressure
bodies
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
EP94114019A
Other languages
German (de)
English (en)
Other versions
EP0702194B1 (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.)
Garrett Motion SARL
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
Priority to EP94114019A priority Critical patent/EP0702194B1/fr
Priority to DE59407236T priority patent/DE59407236D1/de
Publication of EP0702194A1 publication Critical patent/EP0702194A1/fr
Application granted granted Critical
Publication of EP0702194B1 publication Critical patent/EP0702194B1/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
    • F23D14/60—Devices for simultaneous control of gas and combustion air
    • 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
    • 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

Definitions

  • the invention relates to a combined gas / air valve for burners according to the preamble of claim 1.
  • a valve of this type known from EP-A 0 559 280
  • each of the two valve bodies interacts with a conically shaped flow channel, in this way one in each case Throttle point to create variable passage cross section.
  • One valve body protrudes into a conically opening inlet channel for the fuel gas and flows against it in the opening direction.
  • the other valve body works together with a boundary wall of the mixture chamber which is conical in the same direction. This has the consequence that although the ratio of the mixture flow to the gas flow remains the same when the double valve body jams or there is strong friction, the ratio of gas to air flow is changed.
  • the invention is intended to remedy this.
  • a device for regulating the gas and combustion air supply to a burner in the same direction which has a double actuator, which can act on both the gas supply and the air supply, and is adjustable by a common electric drive.
  • an integrated mixing and adjusting module IMS for modulating premix burners is shown in FIG. 2 on page 410, in which the double actuator in the form of a double valve has a first throttle body for the air supply and a second throttle body coupled to the first throttle body for the gas supply, which are adjusted together by the control motor.
  • the two coaxially arranged throttle bodies can be adjusted relative to one another by rotating the valve rod of the one throttle body, which is provided with an external thread, in the valve rod of the other throttle body, which is designed as a bushing and has an internal thread.
  • the gas and air supply are adjusted together with a fixed mixing ratio.
  • the combustion air blower works at constant speed.
  • a similar device is known from DE-PS 969 044, where two conical throttle bodies are provided, which are mechanically coupled to one another via a rod, one of which, together with a first valve seat, supplies the combustion air supply controlling valve and the other, together with a second valve seat, forms a valve controlling the gas supply.
  • the gas / air mixture is drawn in through a compressor downstream of this mixing valve.
  • the two valve bodies are connected to the diaphragm of a diaphragm actuator via a common valve rod.
  • the supply air pressure acts on the underside of this membrane, while the chamber above the membrane is connected to the mixture outlet.
  • a weight placed on the membrane counteracts the supply air pressure.
  • a separate drive is provided for the joint adjustment of the two valve bodies. This considerably increases the space required for the combined gas / air valve.
  • An air / fuel valve for gas burners described in EP-A-0 316 454 also uses a separate valve drive to adjust the mechanically connected valve bodies.
  • a primary air valve and a secondary air valve are combined to form one structural unit.
  • the valve body of the primary air valve works together with a conical counter surface, while the valve body of the gas valve itself is conical.
  • the valve bodies of all three valves are adjusted by the measured actuator.
  • the invention characterized in claim 1 has the advantage that, like the aforementioned double valve according to EP-A 0 559 280, it does not require a special drive for the valve body, but has the essential advantage over this prior art that even in the case a mechanical impairment of the movement of the two valve bodies, for example as a result of a clamping of the valve rod or as a result of increased friction, the gas / air ratio which has been set is maintained regardless of the respective position of the double valve body and thus proper combustion is guaranteed.
  • This throughput is determined by the heat requirement, for example a hot water heater or a room to be heated, which controls the speed of the fan and thus the negative pressure downstream of the valve.
  • Advantageous refinements of the invention result from the subclaims. It is explained below using an exemplary embodiment shown in the drawing.
  • the valve housing 1 shown in section has an air inlet 2 and an outlet 3 for the gas / air mixture.
  • the cylindrical air inlet 2 merges into a conical or otherwise enlarging its flow channel 4, in which a disk-shaped valve body 5 is axially displaceable. It carries at its lower end facing the inlet 2 a pin 6 with a rounded cap, the one adjustable stop 7 faces in the form of a screw.
  • This is adjustable in a cross member 8 spanning the air inlet 2 and provided with air through openings. Ribs 9 projecting into the flow channel 4 serve to axially guide the valve body 5.
  • a second valve body 11 is fastened to the valve body 5 via a valve rod 10 and cooperates with a likewise conical flow channel 12. This passes into the gas inlet 13.
  • the taper or change in cross section of both flow channels 4 and 12 runs in the same direction.
  • a guide pin 14 in connection with a stationary guide 15 ensures a tilt-free guidance of the double valve body 5, 10, 11.
  • the flow channel 12 is provided in a bushing 17 inserted into the cover 16 of the housing 1.
  • a helical or conical spring 18 is supported on the one hand on the housing cover 16 and on the other hand on the valve body 5 of the air valve and presses it in the direction of the conical boundary wall 4 of the air inflow channel.
  • the double closing body 5, 10, 11 has no drive, but is raised against the force of the spring 18 and against the force of its weight by the negative pressure at the mixture outlet 3, provided that this negative pressure is sufficiently strong.
  • the size of the negative pressure determines the position of both valve bodies 5 and 11. Since the double closing body 5, 10 is guided at both ends in guides 9 and 15, it can also be arranged with the valve rod 10 extending horizontally.
  • the dimensions of the two closing bodies 5 and 11 and the associated flow channels 4 and 12 are such that a predetermined gas / air ratio in the mixture M at the outlet 3 is present in any position of the double valve body, regardless of the total flow rate of the mixture.
  • the two valve bodies 5 and 11 can be arranged so as to be adjustable relative to one another, for example by providing the valve rod 10 with a thread at its lower end and being adjustable in a corresponding internal thread of the valve body 5.
  • the guide pin 14 can be equipped with an engagement surface for an adjustment tool.
  • Maintaining a constant gas / air ratio requires that the inlet pressures of gas and air be in a predetermined relationship.
  • This can be achieved by a pressure regulator 19 in the gas supply line 20, which tracks the inlet gas pressure P13 to the inlet air pressure P2 either in a ratio of 1: 1 or with a constant amplification factor.
  • a suitable embodiment of a pressure regulator for this is in European patent application 93 114 902.5 from September 16, 1993 (72200796). Other known pressure regulators can also be used for this.
  • the position of the valve bodies 5, 11 depends on the pressure difference P2 - P3 between the pressures P2 at the air inlet 2 and at the mixture outlet 3 and is, for example, proportional to this pressure difference.
  • the blower increases the negative pressure at outlet 3 and thus the throughput.
  • the air supply through inlet 2 and the gas supply through inlet 13 are increased in an unchanged ratio to one another. If heat is no longer required and the blower is switched back to a minimum speed or stopped, the underpressure lifting the valve body 5 is eliminated, and the spring 18 presses the valve body 5 with its cap 6 against the stop 7.
  • This can be set, for example, in such a way that a minimum gas / air throughput that prevents the burner from going out is maintained. Since no special drive is required for the double valve body 4, 11, this valve has a significantly lower overall height than the valves with double valve body known in the prior art for simultaneous gas / air control.
  • the opening characteristics of the double valve body can be influenced by the spring 18, which can be adjusted in a known manner.
  • the spring 18 can be supported, for example, via an axially adjustable stop on the cover 16.
  • a pressure difference P2 - P3, which moves the valve bodies 5, 11, can be generated by a blower, not shown, which is effective at the air inlet 2, at the mixture outlet 3 or at the outlet of a combustion chamber connected downstream of the valve.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Multiple-Way Valves (AREA)
EP94114019A 1994-09-07 1994-09-07 Soupape combinée gaz/air pour brûleur Expired - Lifetime EP0702194B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP94114019A EP0702194B1 (fr) 1994-09-07 1994-09-07 Soupape combinée gaz/air pour brûleur
DE59407236T DE59407236D1 (de) 1994-09-07 1994-09-07 Kombiniertes Gas/Luft-Ventil für Brenner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP94114019A EP0702194B1 (fr) 1994-09-07 1994-09-07 Soupape combinée gaz/air pour brûleur

Publications (2)

Publication Number Publication Date
EP0702194A1 true EP0702194A1 (fr) 1996-03-20
EP0702194B1 EP0702194B1 (fr) 1998-11-04

Family

ID=8216263

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94114019A Expired - Lifetime EP0702194B1 (fr) 1994-09-07 1994-09-07 Soupape combinée gaz/air pour brûleur

Country Status (2)

Country Link
EP (1) EP0702194B1 (fr)
DE (1) DE59407236D1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19729047C1 (de) * 1997-07-08 1998-09-24 Honeywell Bv Mischvorrichtung zur Erzeugung eines Gemisches aus Gas und Verbrennungsluft für einen Brenner
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
EP1114688A2 (fr) 2000-01-06 2001-07-11 DI-WA Lock GmbH Soupape de sécurité pour l'alimentation en oxygène et en gaz de coupe d'un chalumeau de découpe et de soudage
WO2008058640A1 (fr) * 2006-11-14 2008-05-22 Sit La Precisa S.P.A. Procédé de contrôle de la distribution d'un combustible air-gaz à un dispositif brûleur
CN101469871B (zh) * 2007-12-27 2011-05-25 广东万和新电气股份有限公司 燃气具的燃气和空气定比例控制阀
CN103261791A (zh) * 2010-12-15 2013-08-21 庆东纳碧安株式会社 具有功率调节装置的燃气锅炉及燃气锅炉的功率调节方法
DE102017216966A1 (de) * 2017-09-25 2019-03-28 Robert Bosch Gmbh Mischeinrichtung für Heizgeräte sowie Heizgeräte mit einer solchen Mischeinrichtung
CN113776071A (zh) * 2021-09-30 2021-12-10 合肥工业大学 一种voc低温燃烧的尾气进气气压自控装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100436943C (zh) * 2006-12-13 2008-11-26 中山华帝燃具股份有限公司 一种实现空气/燃气定比例分配的燃烧器及其分配方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2130357A (en) * 1982-11-12 1984-05-31 British Gas Corp Apparatus for flow ratio control
JPS62147214A (ja) * 1985-12-20 1987-07-01 Nippon Shiirasu Kk 空燃比制御装置
EP0508164A1 (fr) * 1991-03-30 1992-10-14 Ruhrgas Aktiengesellschaft Dispositif de contrôle du débit et/ou du rapport de mélange d'un mélange combustible gazeux-air
EP0559280A1 (fr) * 1992-03-06 1993-09-08 Atag Verwarming B.V. Dispositif pour le dosage de gaz
DE4303700A1 (de) * 1993-02-09 1994-08-18 Buderus Heiztechnik Gmbh Vorrichtung zur Regelung des Gas-Luft-Verhältnisses bei einem Gasbrenner

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2130357A (en) * 1982-11-12 1984-05-31 British Gas Corp Apparatus for flow ratio control
JPS62147214A (ja) * 1985-12-20 1987-07-01 Nippon Shiirasu Kk 空燃比制御装置
EP0508164A1 (fr) * 1991-03-30 1992-10-14 Ruhrgas Aktiengesellschaft Dispositif de contrôle du débit et/ou du rapport de mélange d'un mélange combustible gazeux-air
EP0559280A1 (fr) * 1992-03-06 1993-09-08 Atag Verwarming B.V. Dispositif pour le dosage de gaz
DE4303700A1 (de) * 1993-02-09 1994-08-18 Buderus Heiztechnik Gmbh Vorrichtung zur Regelung des Gas-Luft-Verhältnisses bei einem Gasbrenner

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 11, no. 377 (M - 649)<2824> 9 December 1987 (1987-12-09) *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19729047C1 (de) * 1997-07-08 1998-09-24 Honeywell Bv Mischvorrichtung zur Erzeugung eines Gemisches aus Gas und Verbrennungsluft für einen Brenner
EP0890787A2 (fr) 1997-07-08 1999-01-13 Honeywell B.V. Dispositif de mélange pour gaz et comburant dans une installation de combustion
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
EP1114688A2 (fr) 2000-01-06 2001-07-11 DI-WA Lock GmbH Soupape de sécurité pour l'alimentation en oxygène et en gaz de coupe d'un chalumeau de découpe et de soudage
EP1114688A3 (fr) * 2000-01-06 2004-04-14 DI-WA Lock GmbH Soupape de sécurité pour l'alimentation en oxygène et en gaz de coupe d'un chalumeau de découpe et de soudage
WO2008058640A1 (fr) * 2006-11-14 2008-05-22 Sit La Precisa S.P.A. Procédé de contrôle de la distribution d'un combustible air-gaz à un dispositif brûleur
CN101469871B (zh) * 2007-12-27 2011-05-25 广东万和新电气股份有限公司 燃气具的燃气和空气定比例控制阀
CN103261791A (zh) * 2010-12-15 2013-08-21 庆东纳碧安株式会社 具有功率调节装置的燃气锅炉及燃气锅炉的功率调节方法
CN103261791B (zh) * 2010-12-15 2015-09-30 庆东纳碧安株式会社 具有功率调节装置的燃气锅炉及燃气锅炉的功率调节方法
DE102017216966A1 (de) * 2017-09-25 2019-03-28 Robert Bosch Gmbh Mischeinrichtung für Heizgeräte sowie Heizgeräte mit einer solchen Mischeinrichtung
CN113776071A (zh) * 2021-09-30 2021-12-10 合肥工业大学 一种voc低温燃烧的尾气进气气压自控装置

Also Published As

Publication number Publication date
DE59407236D1 (de) 1998-12-10
EP0702194B1 (fr) 1998-11-04

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