EP0644377B1 - Dispositif de commande pour brûleur à gaz - Google Patents

Dispositif de commande pour brûleur à gaz Download PDF

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Publication number
EP0644377B1
EP0644377B1 EP93114902A EP93114902A EP0644377B1 EP 0644377 B1 EP0644377 B1 EP 0644377B1 EP 93114902 A EP93114902 A EP 93114902A EP 93114902 A EP93114902 A EP 93114902A EP 0644377 B1 EP0644377 B1 EP 0644377B1
Authority
EP
European Patent Office
Prior art keywords
gas
throttle
control module
valve
control
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
EP93114902A
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German (de)
English (en)
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EP0644377A1 (fr
Inventor
Enno Vrolijk
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Honeywell BV
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Honeywell BV
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Application filed by Honeywell BV filed Critical Honeywell BV
Priority to DE59304310T priority Critical patent/DE59304310D1/de
Priority to EP93114902A priority patent/EP0644377B1/fr
Priority to US08/282,335 priority patent/US5520533A/en
Priority to CA002132124A priority patent/CA2132124C/fr
Publication of EP0644377A1 publication Critical patent/EP0644377A1/fr
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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
    • 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
    • F23N5/00—Systems for controlling combustion
    • F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel
    • F23N5/188—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel using mechanical means
    • 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
    • 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
    • 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
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/24—Valve details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2900/00—Special features of, or arrangements for controlling combustion
    • F23N2900/05181—Controlling air to fuel ratio by using a single differential pressure detector
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2514—Self-proportioning flow systems
    • Y10T137/2521—Flow comparison or differential response

Definitions

  • the invention relates to a control device for the supply of gas and combustion air to a burner controlled by the heat requirement of a consumer, as described in the preamble of claim 1.
  • the reinforcing pneumatic control module has a large-area control membrane, which is acted upon by the differential pressure on both sides, and a control membrane of smaller area, which is supported on the control membrane by a spring, carries the closing body of the blow-off valve.
  • Another servo valve is connected between the drive chamber for the diaphragm of the main valve and a connecting line to the outlet of the gas control valve, the closing body of which is under the pretension of a compression spring which limits the maximum gas pressure.
  • the control diaphragm is supported on an adjustable stop by a compression spring.
  • one membrane chamber of the control module is connected to a venturi nozzle provided in the combustion air duct and the other membrane chamber is connected to the bottom of the combustion chamber.
  • the membrane of the control module acts directly on the main gas valve via a valve rod.
  • a device for the simultaneous control of the gas and air supply to a burner whereby an air control valve provided with a diaphragm actuator has a temperature sensor controlled servo pressure regulator is attached and a gas control valve also provided with a diaphragm actuator receives its control pressure from the same servo pressure regulator.
  • a pressure regulator is placed on the gas control unit and a pneumatic pressure or power amplifier is placed on top of it.
  • the invention characterized in claim 1 greatly simplifies the construction of a gas control device of the type described in the introduction. It also enables simple adjustment of the control device when using different fuel gases.
  • the differential pressure signal which is proportional to the combustion air flow rate, is here pneumatically compared directly with the gas pressure at the outlet of the gas control valve, and a pneumatic control variable for the diaphragm drive of the main gas valve is obtained therefrom.
  • Advantageous refinements of the invention result from the subclaims.
  • An additional adjustment device in the gas supply line to the burner allows the gas / air mixture to be fine-tuned to the value required for optimal combustion.
  • a heat exchanger 2 and a burner 3 are arranged in the combustion chamber 1 of a gas-fired heating device.
  • the heat exchanger is connected via a flow line 4 and a return line 5 to a consumer, not shown.
  • a temperature sensor 6 measures the flow temperature of the hot water supplied to the consumer and delivers a corresponding signal to the actual value input 7 of the temperature controller 8.
  • This receives at its setpoint input 9, for example from one Manual adjuster a setpoint signal corresponding to the desired temperature.
  • it controls the energy supply to the motor 10 of the blower 11 via a converter, which feeds combustion air to the burner 3 via the supply air duct 12.
  • the exhaust gases leave the otherwise closed combustion chamber 1 through the flue gas discharge 13.
  • the gas to be burned is fed to a gas nozzle 14 in the feed line 12 to the burner 3 from a gas control valve 15.
  • Air supply, gas supply and mixing chamber can also be designed and / or arranged differently.
  • the fan 11 can be provided in the trigger 13.
  • the gas control valve 15 serving as the main gas valve is connected between the gas inlet 16 and the gas outlet 17. It comprises a closing body 19 which is biased in the closing direction by a spring 18 and which cooperates with a valve seat 21 inserted into the partition 20.
  • the closing body 19 is actuated via a valve rod 22 by a membrane 23 which closes the control chamber 24.
  • the control chamber 24 of the main gas valve 15 is connected on the one hand via a first throttle 25 to the gas inlet 16 and on the other hand to a blow-off valve provided in a control module 26, the closing body 27 of which is carried by the membrane 28 of the control module 26.
  • the seat 29 of the blow-off valve 27, 29 is connected to the control chamber 24 via a line 30.
  • a spring 31 acts on the closing body 27 in the opening direction, while an opposing spring 32 is supported on an adjusting screw 33 and is effective in the opposite direction.
  • the combustion air throughput generated by the blower 11 is measured with the aid of a differential pressure measuring device which is inserted into the supply air duct 12 and which has an orifice 34 and an upstream, that is to say on the high pressure side of the fan in the supply air duct 12 opening first measuring line 35 and a downstream of the panel in the supply air duct 12 opening second measuring line 36.
  • the line 35 is connected to the control chamber 36 of the control module.
  • the blow-off chamber 37 of the control module 26 is connected on the one hand via a second throttle 38 to the outlet 39 of the main gas valve 15 and on the other hand via a third throttle 40 to the low pressure line 36 of the differential pressure measuring device 34, 35, 45. Both chokes 38 and 40 are preferably adjustable.
  • An adjustable fourth throttle 43 is arranged in the gas feed line 17 between the branch 41 to the second throttle 38 and the mouth 14 into the gas / air feed duct 42 to the burner 3.
  • the throttle 25 can also be adjustable.
  • the speed of the fan 11 and thus the combustion air throughput is controlled as a function of the heat requirement by the controller 8. If the air throughput increases, the pressure in the measuring line 35 also increases, as a result of which the pressure prevailing in the control chamber 45 of the control module 26 increases and the membrane 28 is thus moved downward.
  • the blow-off valve 27, 29 is moved in the direction of the closed position, as a result of which the pressure in the control chamber 24 increases and the main valve 19, 21 opens further.
  • the increased air throughput is thus followed by an increased gas throughput.
  • control diaphragm 28 of the control module 26 counteracts a greater pressure from below and thus the control pressure generated by the air throughput in the high-pressure measuring line 35 the control chamber 45, the membrane 28 and with it the closing body 27 cannot move as far down as without the increased pressure in the line 44.
  • the blow-off valve 27, 29 is closed less, the pressure in the control chamber 24 decreases, and the Spring 18 can move the closing body 19 of the main gas valve in the closing direction and thus throttle the gas throughput. In this way, air throughput and gas throughput are pneumatically linked to one another in the same sense.
  • the throttle 40 between the blow-off chamber 37 and the low-pressure measuring line 36 ensures, on the one hand, that pressure can build up in the connecting line 44 and, on the other hand, the pressure in the chamber 37 can be reduced when the blow-off valve 27, 29 is closed.
  • R 38 and R 40 are the flow resistances of the two restrictors 38 and 40, respectively.
  • the gain or proportionality factor with which the change in the gas pressure dP g is linked to that of the air pressure dP a can thus be set in the desired manner by adjusting the restrictors 38 and 40.
  • the offset of the controller can be set.
  • the throttle 43 can be used to fine-tune the gas / air ratio. If in the exemplary embodiment shown the combustion air throughput is adjusted by changing the speed of the blower 11 to the heat requirement, it can be seen that for the present invention the type of control of the combustion air throughput is of subordinate importance and can also be carried out, for example, by an air flap or by an air valve.

Claims (6)

  1. Dispositif de régulation pour l'envoi de gaz et d'air de combustion à un brûleur d'une manière commandée par le besoin en chaleur d'un appareil d'utilisation, dans lequel
    a) un signal de sortie, qui correspond au besoin en chaleur, d'un régulateur du besoin en chaleur commande l'envoi d'air de combustion;
    b) un dispositif de mesure de pression différentielle (34, 35,45) produit un signal de pression différentielle, qui est proportionnel au courant d'air de combustion, et l'envoie aux deux chambres à membrane (45,37) d'un module de commande pneumatique (26);
    c) le signal de sortie pneumatique du module de commande charge la membrane (23) d'une vanne principale d'envoi de gaz (15), qui est montée dans la canalisation d'amenée de gaz (16,17,39) et est commandée par la membrane;
    d) la chambre de commande (24) de la vanne principale d'envoi de gaz (15) est raccordée d'une part par l'intermédiaire d'un premier étranglement (25) à l'entrée de gaz (16) de la vanne principale d'envoi de gaz et d'autre part à une vanne d'évacuation (27,28,29) prévue dans le module de commande (26) et dont le corps de fermeture (27) est porté par la membrane (28) du module de commande; et
    e) la chambre de pression (45) du module de commande (26) est raccordée au côté haute pression (35) du dispositif de mesure de pression différentielle (34,35,45),
    caractérisé en ce que
       f) la chambre d'évacuation (37) du module de commande (26) est raccordée d'une part par l'intermédiaire d'un second étranglement (38) à la sortie (39) de la vanne principale d'envoi de gaz (15) et d'autre part, par l'intermédiaire d'un troisième étranglement (40), au côté basse pression (36) du dispositif de mesure de pression différentielle (34,35,45).
  2. Dispositif de régulation selon la revendication 1, caractérisé en ce que la membrane (28) du module de commande (26) prend appui par l'intermédiaire d'un ressort de pression (32), sur une butée (33) réglable dans le boîtier du module de commande (26).
  3. Dispositif de régulation selon l'une des revendications 1 ou 2, caractérisé en ce que les premier, second et/ou troisième étranglements (25,38,40) sont réglables.
  4. Dispositif de régulation selon la revendication 1, 2 ou 3, caractérisé en ce que dans la canalisation d'amenée de gaz (39,17,14), un quatrième étranglement réglable (43) est prévu entre la dérivation (39) aboutissant au second étranglement (38) et l'embouchure (14) aboutissant au canal (42) d'amenée du gaz/d'air au brûleur (3).
  5. Dispositif de régulation selon l'une des revendications 1 à 4, caractérisé par un dimensionnement ou un réglage tel du second étranglement (38) et du troisième étranglement (40) que l'on a P g = R 38 + R 40 R 40 · P a
    Figure imgb0010
     avec
    Pg = pression du gaz au niveau de l'embouchure (14) de la canalisation d'amenée de gaz (17) dans le canal de mélange (42);
    Pa = pression d'air sur le côté haute pression dans le dispositif de mesure de pression différentielle (34, 35,45);
    R38 = résistance d'écoulement dans le second étranglement (38);
    R40 = résistance d'écoulement dans le troisième étranglement (40).
  6. Dispositif de régulation selon l'une des revendications 1 à 5, caractérisé en ce que le facteur d'amplification pneumatique du module de commande (26) est choisi égal à 1:1.
EP93114902A 1993-09-16 1993-09-16 Dispositif de commande pour brûleur à gaz Expired - Lifetime EP0644377B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE59304310T DE59304310D1 (de) 1993-09-16 1993-09-16 Regeleinrichtung für Gasbrenner
EP93114902A EP0644377B1 (fr) 1993-09-16 1993-09-16 Dispositif de commande pour brûleur à gaz
US08/282,335 US5520533A (en) 1993-09-16 1994-07-29 Apparatus for modulating the flow of air and fuel to a gas burner
CA002132124A CA2132124C (fr) 1993-09-16 1994-09-15 Appareil servant a moduler le debit d'air et de combustible vers un bruleur a gaz

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP93114902A EP0644377B1 (fr) 1993-09-16 1993-09-16 Dispositif de commande pour brûleur à gaz

Publications (2)

Publication Number Publication Date
EP0644377A1 EP0644377A1 (fr) 1995-03-22
EP0644377B1 true EP0644377B1 (fr) 1996-10-23

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EP93114902A Expired - Lifetime EP0644377B1 (fr) 1993-09-16 1993-09-16 Dispositif de commande pour brûleur à gaz

Country Status (4)

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US (1) US5520533A (fr)
EP (1) EP0644377B1 (fr)
CA (1) CA2132124C (fr)
DE (1) DE59304310D1 (fr)

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* Cited by examiner, † Cited by third party
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EP1626321A1 (fr) 2004-08-09 2006-02-15 Karl Dungs GmbH & Co.KG Régulateur de pression et son procédé de controle
EP1635117A1 (fr) 2004-09-14 2006-03-15 A. Theobald S.A. Procédé pour la régulation du rapport air/gaz d'un brûleur et brûleur mettant en oeuvre ce procédé
DE102010051122A1 (de) * 2010-11-11 2012-05-16 Robert Bosch Gmbh Regeleinrichtung
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
WO2019161965A1 (fr) 2018-02-23 2019-08-29 Truma Gerätetechnik GmbH & Co. KG Système de soupape

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US10422531B2 (en) * 2012-09-15 2019-09-24 Honeywell International Inc. System and approach for controlling a combustion chamber
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WO2019161965A1 (fr) 2018-02-23 2019-08-29 Truma Gerätetechnik GmbH & Co. KG Système de soupape
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DE102018001441B4 (de) 2018-02-23 2022-07-28 Truma Gerätetechnik GmbH & Co. KG Ventilvorrichtung

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US5520533A (en) 1996-05-28
CA2132124A1 (fr) 1995-03-17
DE59304310D1 (de) 1996-11-28
EP0644377A1 (fr) 1995-03-22
CA2132124C (fr) 2006-01-10

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