EP0390964B2 - Dispositif de commande pour brûleur à gaz - Google Patents

Dispositif de commande pour brûleur à gaz Download PDF

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Publication number
EP0390964B2
EP0390964B2 EP89114136A EP89114136A EP0390964B2 EP 0390964 B2 EP0390964 B2 EP 0390964B2 EP 89114136 A EP89114136 A EP 89114136A EP 89114136 A EP89114136 A EP 89114136A EP 0390964 B2 EP0390964 B2 EP 0390964B2
Authority
EP
European Patent Office
Prior art keywords
gas
valve
control
diaphragm
pressure
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
EP89114136A
Other languages
German (de)
English (en)
Other versions
EP0390964B1 (fr
EP0390964A2 (fr
EP0390964A3 (en
Inventor
Enno Jan 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
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Application filed by Honeywell BV filed Critical Honeywell BV
Publication of EP0390964A2 publication Critical patent/EP0390964A2/fr
Publication of EP0390964A3 publication Critical patent/EP0390964A3/de
Publication of EP0390964B1 publication Critical patent/EP0390964B1/fr
Application granted granted Critical
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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
    • F23N1/08—Regulating fuel supply conjointly with another medium, e.g. boiler water
    • F23N1/10—Regulating fuel supply conjointly with another medium, e.g. boiler water and with air supply or draught
    • F23N1/107—Regulating fuel supply conjointly with another medium, e.g. boiler water and with air supply or draught using mechanical means
    • 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
    • F23N1/00—Regulating fuel supply
    • F23N1/08—Regulating fuel supply conjointly with another medium, e.g. boiler water
    • F23N1/10—Regulating fuel supply conjointly with another medium, e.g. boiler water and with air supply or draught
    • 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
    • F23N2005/182—Air flow switch
    • 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
    • F23N2225/06—Measuring pressure for determining flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • F23N2225/19—Measuring temperature outlet temperature water heat-exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2233/00—Ventilators
    • F23N2233/06—Ventilators at the air intake
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2233/00—Ventilators
    • F23N2233/06—Ventilators at the air intake
    • F23N2233/08—Ventilators at the air intake with variable speed
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2239/00—Fuels
    • F23N2239/04—Gaseous fuels

Definitions

  • the invention relates to a control device according to the preamble of claim 1.
  • the control module consists of a pressure converter, which converts the differential pressure into a higher proportional pressure, which is then arranged in the gas supply line to the burner Gas pressure regulator acts.
  • the supply pressure for the pressure transducer can be taken directly from the gas or air line.
  • the pressure transducer contains a diaphragm which is exposed to the differential pressure and acted on one side with the force of a compensating spring, to which a tappet acting on a spring-loaded transmission lever is fastened.
  • the transmission lever which is equipped with an adjustable slide, acts on a pneumatic force switch, the output signal of which is fed as a control variable to the gas pressure regulator mentioned.
  • a temperature sensor controls the main valve of a gas control device via a servo pressure controller, the control pressure simultaneously adjusting a throttle valve in the combustion air supply line in the same direction as the gas valve via a separate diaphragm drive.
  • the combustion air supply line is not connected to the burner, but to the bottom area of the combustion chamber, and the differential pressure proportional to the combustion air supply is between a nozzle arranged in the combustion air supply line and an generated the bottom area of the combustion chamber connected line.
  • Both control pressure lines open on both sides of the membrane of the control module in its membrane chambers, and the membrane adjusts the closing body of the gas control valve.
  • a differential pressure measuring point which generates a flow signal and has a measuring orifice in the flue gas outlet.
  • the differential pressure generated there acts on the two sides of a membrane, which controls a transfer lever which is displaceably mounted in a cutting edge bearing via a tappet. Its end facing away from the tappet adjusts the closing body of the gas control valve via a spring.
  • EP-A 0 275 568 shows a gas-operated water heater in which there is an orifice in the combustion air supply line, before and behind which connected pressure lines on both sides of a control membrane open into the membrane chambers of a control module and the control membrane acts on a gas pressure regulator via a tappet.
  • the fan In a burner control known from US-A 37 41 710, the fan is located in the common gas / air supply line, and the amount of air is controlled by an air flap arranged in the air intake line depending on the heat requirement.
  • the air pressure behind the flap influences the position of the fuel gas valve via a diaphragm drive.
  • the measuring mechanism also integrated in the gas control valve has four input connections, namely p L + and p L for the air pressure upstream or downstream of a measuring orifice in the combustion air duct, p F for the combustion chamber pressure and p G for the Pressure at the outlet of the gas valve.
  • the object of the invention is to improve a control device of the type mentioned with regard to its function and also its safety.
  • This is achieved by the invention characterized in claim 1.
  • the control module generates a sufficiently high pneumatic actuating signal for the diaphragm drive of the gas control valve even when there is little air draft and thus low differential pressure due to its amplifying effect.
  • this ensures that the amount of gas supplied is tracked proportionally to the amount of air, even with a low throughput, and thus the best possible combustion is also ensured in this case.
  • Advantageous embodiments of the invention result from the dependent claims.
  • a heat exchanger 1 is connected via a flow line 2 and a return line 3 to a consumer, not shown.
  • a temperature sensor 4 measures the flow temperature of the hot water supplied to the consumer and delivers a corresponding signal to the actual value input 5 of the temperature controller 6. This receives a signal corresponding to the desired temperature at its setpoint input 7, for example from a manual adjuster. It controls, for example, the power supply to the motor 8 of the fan 9 via a converter.
  • the compressed air is fed via the air duct 10 to the burner 11, which, like the heat exchanger 1, is arranged in an otherwise closed combustion chamber 12.
  • the exhaust gases leave the combustion chamber 12 through the flue gas outlet 13.
  • the gas to be burned is fed from a gas control valve 15 to a gas nozzle 14 in the feed line 10 to the burner 11.
  • the gas control valve corresponds in its structure, for example, the applicant's combination valve V4700.
  • a main valve is connected between its inlet 26 and its outlet 27, which consists of a closing body 28 and a valve seat 29.
  • the closing body 28 is biased in the closing direction via a valve rod 30 and a spring 31.
  • the valve rod bears against the working diaphragm 32 of the servo pressure regulator.
  • the closing body 35 of a closing solenoid valve is switched from the rest position shown to the opposite position via a magnetic drive 33 and the spring-loaded actuating rod 34. It then closes the passage 36.
  • gas passes from the inlet 26 via a throttle 37 into the space 38 and from there into the diaphragm chamber 39 of the main valve 28 to 32.
  • the pressure in the drive chamber 39 moves the diaphragm 32 downward and opens the main valve 28, 29. Gas thus passes from inlet 26 to outlet 27 and from there via line 40 to gas nozzle 14 on burner 11.
  • the pressure at the outlet 27 of the gas control valve is simultaneously supplied via the channel 41 to the chamber 42 on the side of the control membrane 43 carrying the closing body 21 facing away from the control membrane 18.
  • a spring 54 which serves to set the zero point, acts on the control diaphragm 18 and is supported on the housing side by an adjusting screw 52. By adjusting this adjusting screw 52 in the thread of the bushing 53, the force exerted by the spring 54 on the control membrane 18 can be changed.
  • the pressure at the outlet 27 passes through the channel 44 into the chamber 45 below the diaphragm 49.
  • the latter carries a closing body 50 which interacts with a valve seat 51.
  • a compression spring 47 acts on the diaphragm 49 in the closing direction of this servo valve Adjusting screw 46 is supported in the thread of the socket 48.
  • the maximum gas pressure can be set and limited with the adjusting screw 46.
  • the servo pressure regulator consisting of diaphragm 49, spring 47 and closing body 50 in connection with the seat 51, is used as in the aforementioned valve series V4700 to limit the maximum gas pressure.
  • the closing force of the closing body 50 on the seat 51 is set higher with the spring 47, all the closing force of the closing body 21 on the seat 22.
  • the second servo valve formed by the control membrane 43, the closing body 21 and the seat 22 in connection with the springs 20 and 54 serves to set the zero point for the control curve of air and gas volume.
  • the valve seat 22 of the servo valve 21, 22 is connected to the chamber 38 via the line 55. It has the same pressure as it acts in the chamber 39 on the membrane 32 of the drive for the main valve 28, 29. If the pressure at the outlet 27 and thus in the channels 41 and 44 increases and the force generated by it by means of the control membrane 43 overcomes that which acts on the membrane 18 from the opposite side through the spring 20, the closing body 21 lifts from the valve seat 22 and the working pressure in the chamber 38 can be reduced via the line 55, the valve seat 22, the chamber 42 and the channel 41 to the outlet 27. This is the normal control process for a servo pressure regulator. This pressure is controlled by the pressure difference on the lines 16 and 17 and thus as a function of the air throughput in the air supply duct 10.
  • the amount of gas supplied to the burner 11 via the nozzle 14 is therefore continuously tracked to the amount of air conveyed by the blower 9.
  • the area ratio of the membranes 18 and 43 determines the gain factor of the control module 19.
  • the on-off valve 35, 36 returns to the rest position shown in the drawing under the force of its closing spring, and the control pressure in the chamber 38 is reduced via the valve seat 36 to the outlet 27.
  • the main valve 28, 29 closes.
  • the control module 19 is arranged as close as possible to the gas control valve 15.
  • the use of a separate control module, which is not integrated in the gas control valve, has the advantage that either by exchange the diaphragms 18 and / or 43 or by exchanging the control module itself to set different gain factors of the control module and thus the control device can adapt to the particular circumstances of the burner system and combustion chamber without changes to the gas control valve.
  • the considerable gain and the resulting high closing force of the closing body 21 ensures reliable pressure control of the gas control valve.
  • the arrangement of the amplifier or control membrane 18 and the control membrane 43 close to each other in a special control module 19 leads to improved control properties and increased stability of the outlet pressure of the gas control valve.
  • the latter can be designed as a standard device for different applications and, depending on the type of application, is combined with a correspondingly dimensioned control module. Since the area of the membranes 18 and 43 can be freely selected, relatively high amplification factors can be achieved. For reasons of space alone, this would not be possible if these membranes were integrated in the gas control valve.
  • the control module can be arranged at any point next to the gas control valve. In particular when using flexible connecting lines, the control module can be accommodated in a heater at the point where there is sufficient space available. It can also be easily adjusted and adjusted there.
  • the flexible line connection of the control module to the air supply duct 10 makes it possible to select the cheapest and most suitable location for the inputs 23 and 56 for a stable mode of operation.

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)

Claims (4)

  1. Dispositif de régulation pour l'amenée à un brûleur (11) de gaz et d'air de combustion, commandée par le besoin de chaleur d'un utilisateur,
    a) un signal de sortie d'un régulateur de besoin de chaleur (6), correspondant au besoin de chaleur, commandant un ventilateur (8, 9) qui produit le courant d'air de combustion;
    b) un agencement de buse (23, 56) dans le canal d'air de combustion (10) produisant un signal de pression différentielle proportionnel au courant d'air de combustion et l'amenant à un module de commande pneumatique (19), amplificateur qui comporte une membrane de commande (18) de grande surface, sollicitée de part et d'autre par la pression différentielle; et
    c) le module de commande (19) agissant, côté sortie, sur une soupape de régulation de gaz (15) qui commande le courant de gaz, en vue d'une adaptation de la quantité de gaz amenée au brûleur (11) au courant d'air de combustion;
    caractérisé
    d) en ce qu'une membrane de régulation (43) s'appuyant par l'intermédiaire d'un premier ressort de compression (20) sur la membrane de commande (18) et présentant une surface plus faible, porte le corps d'obturation (21) d'une soupape de décharge (21, 22);
    e) en ce qu'une chambre (42), sur le côté de la membrane de régulation (43) non dirigé vers la membrane de commande (18), est raccordée à la sortie (27) de la soupape de régulation de gaz (15);
    f) en ce que le siège de soupape (22) de la soupape de décharge (21, 22) est en communication avec la chambre d'entraînement (39) d'une soupape principale (28, 29) commandant le courant de gaz vers le brûleur et disposée en amont de la sortie (27) de la soupape de régulation de gaz (15);
    g) en ce qu'entre la chambre d'entraînement (39) pour la membrane (32) de la soupape principale (28, 29) et une conduite de liaison (44) vers la sortie (27) de la soupape de régulation de gaz (15), est intercalée une autre servo-soupape (50, 51), dont le corps d'obturation (50) est soumis à la précontrainte d'un second ressort de compression (47) limitant la pression maximale de gaz; et
    h) le module de commande (19) est relié, en tant que module séparé, à la soupape de régulation de gaz (15), uniquement par l'intermédiaire de conduites (41, 55).
  2. Dispositif de régulation selon la revendication 1, caractérisé en ce que le second ressort de compression (47) s'appuie, côté carter, contre une vis de réglage (46) pouvant être déplacée dans un appendice de carter (48).
  3. Dispositif de régulation selon la revendication 1 ou 2, caractérisé en ce que le module de commande (19) est relié, par l'intermédiaire de conduites flexibles (16, 17; 41, 55), à l'agencement de buse (23, 56) et/ou à la soupape de régulation de gaz (15).
  4. Dispositif de régulation selon l'une des revendications 1 à 3, caractérisé en ce que la membrane de commande (18) s'appuie, par l'intermédiaire d'un troisième ressort de compression (54), à une butée (52) déplaçable dans le carter du module de commande (19, 53).
EP89114136A 1989-04-07 1989-08-01 Dispositif de commande pour brûleur à gaz Expired - Lifetime EP0390964B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3911268A DE3911268A1 (de) 1989-04-07 1989-04-07 Regeleinrichtung fuer gasbrenner
DE3911268 1989-04-07

Publications (4)

Publication Number Publication Date
EP0390964A2 EP0390964A2 (fr) 1990-10-10
EP0390964A3 EP0390964A3 (en) 1990-12-27
EP0390964B1 EP0390964B1 (fr) 1993-09-29
EP0390964B2 true EP0390964B2 (fr) 1996-07-24

Family

ID=6378066

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89114136A Expired - Lifetime EP0390964B2 (fr) 1989-04-07 1989-08-01 Dispositif de commande pour brûleur à gaz

Country Status (3)

Country Link
EP (1) EP0390964B2 (fr)
JP (1) JPH0355424A (fr)
DE (2) DE3911268A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022183429A1 (fr) 2021-03-04 2022-09-09 Pittway Sarl Appareil de type brûleur à gaz partiellement prémélangé

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT401196B (de) * 1992-02-07 1996-07-25 Vaillant Gmbh Heizgerät
AT401570B (de) * 1992-10-02 1996-10-25 Vaillant Gmbh Verfahren zur steuerung eines gas-gebläsebrenners
DE4317981A1 (de) * 1993-05-28 1994-12-01 Ranco Inc Gas-Luft-Verhältnisregelvorrichtung für einen Temperaturregelkreis für Gasverbrauchseinrichtungen
DE59304310D1 (de) * 1993-09-16 1996-11-28 Honeywell Bv Regeleinrichtung für Gasbrenner
AT400356B (de) * 1993-11-08 1995-12-27 Vaillant Gmbh Gebläsebrenner
IT1274622B (it) * 1994-08-17 1997-07-18 Integra Srl Gruppo valvolare per caldaie a gas
DE19538947C2 (de) * 1995-10-19 1998-11-26 Webasto Thermosysteme Gmbh Fahrzeugheizgerät
DE19639487A1 (de) 1996-09-26 1998-04-09 Honeywell Bv Verfahren und Vorrichtung zur Betriebsoptimierung eines Gasbrenners
DE19821853C1 (de) * 1998-05-15 1999-07-29 Honeywell Bv Regeleinrichtung für Gasbrenner
DE19824521B4 (de) 1998-06-02 2004-12-23 Honeywell B.V. Regeleinrichtung für Gasbrenner
DE19922226C1 (de) * 1999-05-14 2000-11-30 Honeywell Bv Regeleinrichtung für Gasbrenner
DE10037234A1 (de) * 2000-07-31 2002-02-21 Rational Ag Verbrennungssystem für ein Gargerät sowie Gargerät mit solch einem Verbrennungssystem
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
US9528712B2 (en) * 2012-11-05 2016-12-27 Pat Caruso Modulating burner system
CN105509298B (zh) * 2016-01-06 2019-01-29 佛山市沃克曼普电气有限公司 置于水路系统中的气体感应式自适应预混燃烧加热装置
CN108831664B (zh) * 2018-05-17 2020-07-17 清华大学 一种用于低温压缩气体腔的具备换能功能的稳压装置
DE102020121597A1 (de) * 2020-08-18 2022-02-24 Vaillant Gmbh Verfahren und Anordnung zur pneumatischen Gemischbildung bei einem Vormischbrenner

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3101897A (en) * 1960-12-29 1963-08-27 Suburban Appliance Company Control for burners
US3741710A (en) * 1971-12-20 1973-06-26 L Nelson Combustion control valve means and system
US4067191A (en) * 1975-10-10 1978-01-10 Forenade Fabriksverken System for supplying fuel and combustion air to an external combustion engine
DE2908197C2 (de) * 1979-03-02 1985-08-22 Ruhrgas Ag, 4300 Essen Vorrichtung zum Konstanthalten des Mischungsverhältnisses von Gas und Verbrennungsluft bei Gebläsebrennern
DE3147857A1 (de) * 1980-11-27 1983-06-16 Honeywell B.V., Amsterdam Regeleinrichtung
EP0275568A1 (fr) * 1987-01-23 1988-07-27 Furigas Assen B.V. Dispositif à gaz pour eau chaude comprenant un ventilateur d'alimentation et une commande modulée de gaz et d'air

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022183429A1 (fr) 2021-03-04 2022-09-09 Pittway Sarl Appareil de type brûleur à gaz partiellement prémélangé

Also Published As

Publication number Publication date
DE3911268A1 (de) 1990-10-11
EP0390964B1 (fr) 1993-09-29
EP0390964A2 (fr) 1990-10-10
DE58905781D1 (de) 1993-11-04
JPH0355424A (ja) 1991-03-11
EP0390964A3 (en) 1990-12-27

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