EP0863367A1 - Control device for a gas burner - Google Patents

Control device for a gas burner Download PDF

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Publication number
EP0863367A1
EP0863367A1 EP97120267A EP97120267A EP0863367A1 EP 0863367 A1 EP0863367 A1 EP 0863367A1 EP 97120267 A EP97120267 A EP 97120267A EP 97120267 A EP97120267 A EP 97120267A EP 0863367 A1 EP0863367 A1 EP 0863367A1
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EP
European Patent Office
Prior art keywords
gas
gas pressure
regulating device
control
air blower
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
EP97120267A
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German (de)
French (fr)
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EP0863367B1 (en
Inventor
Eckhard Schwendemann
Harry Kölmel
Rainer Feldmeth
Volker Klumpp
Friedrich Feucht
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Siemens Building Technologies AG
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Electrowatt Technology Innovation AG
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Publication of EP0863367A1 publication Critical patent/EP0863367A1/en
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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
    • F23N1/022—Regulating fuel supply conjointly with air supply using electronic 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
    • F23N5/187—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel using electrical or electromechanical 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
    • 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
    • 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
    • F23N2235/16—Fuel valves variable flow or proportional valves

Definitions

  • the invention relates to a control and regulating device for a gas burner according to the preamble of claim 1.
  • Such control devices are used, for example, for commissioning and for controlling the Normal operation of gas-fired heating devices used.
  • heating devices are known in various designs such as boilers and wall heaters. With boilers exist those with fixed power, which are operated in the ON-OFF mode, but also those with variable Power at which the amount of gas to be burned is varied. Thereby exist Fan burners, to which the air required for combustion is supplied by means of a fan, and atmospheric burners without such a fan.
  • a control and regulating device is known from European patent application EP 614 046 known for the operation of a gas fan burner, in which the speed of a fan for the air supply is infinitely variable.
  • EP 614 046 known for the operation of a gas fan burner, in which the speed of a fan for the air supply is infinitely variable.
  • an additional pressure regulator one of the actual air supply adjusted supply of the combustion gas reached. This is intended for the entire operating area an optimal gas-air ratio can be achieved.
  • the invention has for its object to provide a control device for a gas burner, in which the gas-air ratio can be controlled without expensive sensors.
  • FIG. 1 shows a control and regulating device 1 for a gas burner 2, which has a fuel valve 3 and a Air blowers 4 are assigned.
  • An external one acts on an input of the control and regulating device 1 Heating circuit controller 5 in such a way that the heating circuit controller 5 the control and regulating device 1 to cover communicates the burner output required for the heat requirement.
  • this heat demand signal controls the control and regulating device 1, the continuously adjustable fuel valve 3, with which the a fuel line 6 delivered gas is supplied to the combustion chamber.
  • the size of the The heat demand signal thus determines the degree of opening of the fuel valve 3.
  • a gas pressure switch 7 is arranged downstream of the fuel valve 3.
  • the gas pressure switch 7 is designed as a switch which switches from an OFF position to the ON position as soon as the gas volume flow V G being conveyed and thus the pressure p G in the fuel line 6 exceed a predetermined value V G1 or p G1 .
  • the signal from the gas pressure switch 7 is transmitted to the control and regulating device 1 via a line 8.
  • the control and regulating device 1 now controls the air blower 4 so that it rotates at a first speed D 1 when the gas pressure switch 7 is in the OFF position, and that it rotates at a second higher speed D 2 when it rotates the gas pressure switch 7 is in the ON position.
  • Heating devices are only operated at nominal load in exceptional cases, for example during heating phases at the start of heating. Most of the time they run under reduced load in the so-called partial load range.
  • the gas pressure switch 7 can now advantageously be set such that the value V G1 is somewhat greater than the gas volume flow V G required during the greater part of the operating time. The excess air is then optimal both in part-load operation and at nominal load. Since an air volume corresponding to the maximum output no longer has to be heated in the partial load range, there is a significant improvement in efficiency.
  • FIG. 2 shows the air volume flow V L and the gas volume flow V G as a function of the load P of the gas burner 2.
  • the air blower 4 rotates at the speed D 1 .
  • the gas pressure switch 7 switches from the OFF position to the ON position and causes the air blower 4 to increase the speed to the value D 2 .
  • a gas volume flow V G is conveyed which is greater than the value V G1 , so that the air blower 4 rotates at the higher speed D 2 during the ignition.
  • the maximum or maximum gas volume flow required from plant to plant in the partial load range can be different and since the air volume flow is not only dependent on the speed of the air blower 4, but also depends on the air resistance significantly influenced by the exhaust gas chimney, is advantageously the switching point of the gas pressure switch when starting the gas burner 2 7 corresponding to the maximum required in part-load operation or the maximum in part-load operation Gas volume flow set.
  • gas pressure monitors can also be used 7 find application, each different according to a different gas pressure Gas volume flows is set.
  • the speed of the air blower 4 can thus be adjusted in several stages change.
  • a gas pressure switch 7 with several switching points can also be used for this purpose Find application.
  • the functionality of the external heating circuit controller 5 can also be integrated in the control and regulating device 1 be.

Abstract

The controlling and regulating apparatus is for a gas burner (2), to which the air required for combustion is supplied by an air fan (4). The amount of gas supplied to the burner is controlled by a fuel valve (3). There is at least one gas pressure monitor (7) in flow direction behind the fuel valve. The controlling and regulating apparatus (1) sets the revolutions of the fan as a function of the signal supplied by the gas pressure monitor. The fan runs at a certain rate while the gas volume flow is smaller than a preset value and at a higher rate when it exceeds this value.

Description

Die Erfindung bezieht sich auf ein Steuer- und Regelgerät für einen Gasbrenner gemäss dem Oberbegriff des Anspruchs 1.The invention relates to a control and regulating device for a gas burner according to the preamble of claim 1.

Solche Steuer- und Regelgeräte werden beispielsweise zur Inbetriebsetzung und zur Steuerung des Normalbetriebs von gasgefeuerten Heizungseinrichtungen verwendet. Derartige Heizungseinrichtungen sind in verschiedenen Bauformen wie Heizkessel und Wandthermen bekannt. Bei Heizkesseln existieren solche mit fester Leistung, die im EIN-AUS-Betrieb betrieben werden, aber auch solche mit variabler Leistung, bei denen die Menge des zur Verbrennung gelangenden Gases variiert wird. Dabei existieren Gebläsebrenner, denen die zur Verbrennung benötigte Luft mittels eines Gebläses zugeführt wird, und atmosphärische Brenner, bei denen ein solches Gebläse fehlt.Such control devices are used, for example, for commissioning and for controlling the Normal operation of gas-fired heating devices used. Such heating devices are known in various designs such as boilers and wall heaters. With boilers exist those with fixed power, which are operated in the ON-OFF mode, but also those with variable Power at which the amount of gas to be burned is varied. Thereby exist Fan burners, to which the air required for combustion is supplied by means of a fan, and atmospheric burners without such a fan.

Zur Steuerung des Gas-Luft-Verhältnisses sind mehrere Lösungen bekannt. Zum einen ist eine mechanisch starre Kopplung zwischen einem Brennstoffventil und einer Luftklappe möglich. Bei Ölbrennern ist es bekannt, die zweite Ölstufe zuzuschalten, sobald die Luftklappe vollständig geöffnet ist. Bei einer pneumatischen Lösung steuert eine von der geförderten Luftmenge auslenkbare Membrane das Brennstoffventil. Bei einer elektronischen Lösung schliesslich werden der geförderte Luftvolumenstrom und der geförderte Gasvolumenstrom mit Aktuatoren entsprechend dem Bedarf gesteuert und von getrennten Sensoren überwacht.Several solutions are known for controlling the gas-air ratio. For one, one is mechanical rigid coupling possible between a fuel valve and an air damper. It is with oil burners known to switch on the second oil level as soon as the air flap is fully open. At a pneumatic solution controls a membrane that can be deflected by the amount of air conveyed Fuel valve. Finally, in the case of an electronic solution, the conveyed air volume flow and the conveyed gas volume flow controlled with actuators according to the need and by separate sensors monitored.

Aus der europäischen Patentanmeldung EP 614 046 ist beispielsweise eine Steuer- und Regeleinrichtung für den Betrieb eines Gasgebläsebrenners bekannt, bei der die Drehzahl eines Gebläses für die Luftzufuhr stufenlos regelbar ist. Mittels eines zusätzlichen Druckreglers wird dabei eine der tatsächlichen Luftzufuhr angepasste Zuführ des Verbrennungsgases erreicht. Auf diese Weise soll für den ganzen Betriebsbereich ein optimales Gas-Luft-Verhältnis erreicht werden.For example, a control and regulating device is known from European patent application EP 614 046 known for the operation of a gas fan burner, in which the speed of a fan for the air supply is infinitely variable. With an additional pressure regulator, one of the actual air supply adjusted supply of the combustion gas reached. This is intended for the entire operating area an optimal gas-air ratio can be achieved.

Der Erfindung liegt die Aufgabe zugrunde, ein Steuer- und Regelgerät für einen Gasbrenner anzugeben, bei dem eine Steuerung des Gas-Luft-Verhältnisses ohne teure Sensoren möglich ist.The invention has for its object to provide a control device for a gas burner, in which the gas-air ratio can be controlled without expensive sensors.

Die genannte Aufgabe wird erfindungsgemäss durch die Merkmale des Anspruchs 1 gelöst. Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den abhängigen Ansprüchen.According to the invention, the stated object is achieved by the features of claim 1. Beneficial Further developments of the invention result from the dependent claims.

Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnung näher erläutert. Es zeigen:

Fig. 1
ein Steuer- und Regelgerät für einen Gasbrenner, und
Fig. 2
den Luft- und den Gasvolumenstrom in Funktion der Leistung des Gasbrenners.
An exemplary embodiment of the invention is explained in more detail below with reference to the drawing. Show it:
Fig. 1
a control and regulating device for a gas burner, and
Fig. 2
the air and gas volume flow as a function of the power of the gas burner.

Die Fig. 1 zeigt ein Steuer- und Regelgerät 1 für einen Gasbrenner 2, dem ein Brennstoffventil 3 und ein Luftgebläse 4 zugeordnet sind. Auf einen Eingang des Steuer- und Regelgerätes 1 wirkt ein externer Heizkreisregler 5 in der Weise, dass der Heizkreisregler 5 dem Steuer- und Regelgerät 1 die zur Deckung des Wärmebedarfs erforderliche Brennerleistung mitteilt. In Abhängigkeit von diesem Wärmebedarfssignal steuert das Steuer- und Regelgerät 1 das stufenlos verstellbare Brennstoffventil 3 an, mit dem das durch eine Brennstoffleitung 6 geförderte Gas der Brennkammer zugeführt wird. Die Grösse des Wärmebedarfssignals bestimmt also den Öffnungsgrad des Brennstoffventils 3.1 shows a control and regulating device 1 for a gas burner 2, which has a fuel valve 3 and a Air blowers 4 are assigned. An external one acts on an input of the control and regulating device 1 Heating circuit controller 5 in such a way that the heating circuit controller 5 the control and regulating device 1 to cover communicates the burner output required for the heat requirement. Depending on this heat demand signal controls the control and regulating device 1, the continuously adjustable fuel valve 3, with which the a fuel line 6 delivered gas is supplied to the combustion chamber. The size of the The heat demand signal thus determines the degree of opening of the fuel valve 3.

In Strömungsrichtung hinter dem Brennstoffventil 3 ist ein Gasdruckwächter 7 angeordnet. Der Gasdruckwächter 7 ist als Schalter ausgebildet, der von einer AUS-Stellung in die EIN-Stellung schaltet, sobald der geförderte Gasvolumenstrom VG und damit auch der Druck pG in der Brennstoffleitung 6 einen vorbestimmten Wert VG1 bzw. pG1 überschreiten. Das Signal des Gasdruckwächters 7 wird über eine Leitung 8 an das Steuer- und Regelgerät 1 übertragen. Das Steuer- und Regelgerät 1 steuert nun das Luftgebläse 4 so an, dass es mit einer ersten Drehzahl D1 dreht, wenn sich der Gasdruckwächter 7 in der AUS-Stellung befindet, und dass es mit einer zweiten höheren Drehzahl D2 dreht, wenn sich der Gasdruckwächter 7 in der EIN-Stellung befindet.A gas pressure switch 7 is arranged downstream of the fuel valve 3. The gas pressure switch 7 is designed as a switch which switches from an OFF position to the ON position as soon as the gas volume flow V G being conveyed and thus the pressure p G in the fuel line 6 exceed a predetermined value V G1 or p G1 . The signal from the gas pressure switch 7 is transmitted to the control and regulating device 1 via a line 8. The control and regulating device 1 now controls the air blower 4 so that it rotates at a first speed D 1 when the gas pressure switch 7 is in the OFF position, and that it rotates at a second higher speed D 2 when it rotates the gas pressure switch 7 is in the ON position.

Heizeinrichtungen sind nur in Ausnahmefällen, beispielsweise während Aufheizphasen am Heizbeginn, mit Nennlast in Betrieb. Während der meisten Zeit laufen sie bei reduzierter Last im sogenannten Teillastbereich. Der Gasdruckwächter 7 ist nun vorteilhaft so einzustellen, dass der Wert VG1 etwas grösser ist als der während des grösseren Teils der Betriebszeit benötigte Gasvolumestrom VG. Der Luftüberschuss ist dann sowohl im Teillastbetrieb wie bei Nennlast optimal. Da dann im Teillastbereich nicht mehr eine der Maximalleistung entsprechende Luftmenge aufgeheizt werden muss, ergibt sich eine deutliche Effizienzverbesserung.Heating devices are only operated at nominal load in exceptional cases, for example during heating phases at the start of heating. Most of the time they run under reduced load in the so-called partial load range. The gas pressure switch 7 can now advantageously be set such that the value V G1 is somewhat greater than the gas volume flow V G required during the greater part of the operating time. The excess air is then optimal both in part-load operation and at nominal load. Since an air volume corresponding to the maximum output no longer has to be heated in the partial load range, there is a significant improvement in efficiency.

Die Fig. 2 zeigt den Luftvolumenstrom VL und den Gasvolumensstrom VG in Funktion der Last P des Gasbrenners 2. Bei kleiner Last P dreht das Luftgebläse 4 mit der Drehzahl D1 dreht. Überschreitet der Gasvolumenstrom VG den Wert VG1, dann schaltet der Gasdruckwächter 7 von der AUS-Stellung in die EIN-Stellung und bewirkt, dass das Luftgebläse 4 die Drehzahl auf den Wert D2 erhöht. Vorteilhaft ist vorgesehen, dass zur Zündung des Gasbrenners 2 ein Gasvolumenstrom VG gefördert wird, der grösser als der Wert VG1 ist, damit das Luftgebläse 4 bei der Zündung mit der höheren Drehzahl D2 dreht.FIG. 2 shows the air volume flow V L and the gas volume flow V G as a function of the load P of the gas burner 2. When the load P is small, the air blower 4 rotates at the speed D 1 . If the gas volume flow V G exceeds the value V G1 , the gas pressure switch 7 switches from the OFF position to the ON position and causes the air blower 4 to increase the speed to the value D 2 . It is advantageously provided that for the ignition of the gas burner 2, a gas volume flow V G is conveyed which is greater than the value V G1 , so that the air blower 4 rotates at the higher speed D 2 during the ignition.

Da der im Teillastbereich vorwiegend benötigte oder maximale Gasvolumenstrom von Anlage zu Anlage verschieden sein kann und da der geförderte Luftvolumenstrom nicht nur von der Drehzahl des Luftgebläses 4, sondern auch vom massgeblich durch den Abgaskamin beeinflussten Luftwiderstand abhängt, wird vorteilhafterweise bei der Inbetriebnahme des Gasbrenners 2 der Schaltpunkt des Gasdruckwächters 7 entsprechend dem im Teillastbetrieb vorwiegend benötigten oder im Teillastbetrieb maximalen Gasvolumenstrom eingestellt.Because the maximum or maximum gas volume flow required from plant to plant in the partial load range can be different and since the air volume flow is not only dependent on the speed of the air blower 4, but also depends on the air resistance significantly influenced by the exhaust gas chimney, is advantageously the switching point of the gas pressure switch when starting the gas burner 2 7 corresponding to the maximum required in part-load operation or the maximum in part-load operation Gas volume flow set.

In Analogie zur Ausgestaltung des ersterwähnten Ausführungsbeispiel können auch mehrere Gasdruckwächter 7 Anwendung finden, deren jeder auf einen anderen Gasdruck entsprechend unterschiedlichen Gasvolumensströmen eingestellt ist. Damit lässt sich die Drehzahl des Luftgebläses 4 in mehreren Stufen verändern. Alternativ kann für diesen Zweck auch ein Gasdruckwächter 7 mit mehreren Schaltpunkten Anwendung finden.In analogy to the design of the first-mentioned embodiment, several gas pressure monitors can also be used 7 find application, each different according to a different gas pressure Gas volume flows is set. The speed of the air blower 4 can thus be adjusted in several stages change. Alternatively, a gas pressure switch 7 with several switching points can also be used for this purpose Find application.

Die Funktionalität des externen Heizkreisreglers 5 kann auch in das Steuer- und Regelgerät 1 integriert sein.The functionality of the external heating circuit controller 5 can also be integrated in the control and regulating device 1 be.

Claims (4)

Steuer- und Regelgerät (1) für einen Gasbrenner (2), bei dem die zur Verbrennung benötigte Luft mittels eines Luftgebläses (4) zur Brennkammer gefördert wird und bei dem der dem Gasbrenner (2) zugeführte Gasvolumenstrom mittels eines Brennstoffventils (3) gesteuert wird, wobei in Strömungsrichtung hinter dem Brennstoffventil (3) wenigstens ein Gasdruckwächter (7) angeordnet ist, dadurch gekennzeichnet, dass das Steuer- und Regelgerät (1) in Funktion des von dem Gasdruckwächter (7) gelieferten Signals bzw. der von den Gasdruckwächtern (7) gelieferten Signale die Drehzahl des Luftgebläses (4) einstellt.Control and regulating device (1) for a gas burner (2), in which the air required for combustion is conveyed to the combustion chamber by means of an air blower (4) and in which the gas volume flow supplied to the gas burner (2) is controlled by means of a fuel valve (3) , At least one gas pressure monitor (7) being arranged downstream of the fuel valve (3) in the flow direction, characterized in that the control and regulating device (1) functions as a function of the signal supplied by the gas pressure monitor (7) or that of the gas pressure monitors (7 ) the supplied signals sets the speed of the air blower (4). Steuer- und Regelgerät (1) nach Anspruch 1, dadurch gekennzeichnet, dass nur ein einziger Gasdruckwächter (7) vorhanden ist und dass das Steuer- und Regelgerät (1) in Funktion des vom Gasdruckwächter (7) gelieferten Signals das Luftgebläse (4) so ansteuert, dass das Luftgebläse (4) mit einer ersten Drehzahl D1 läuft, sofern der Gasvolumenstrom kleiner als ein vorbestimmter Wert VG1 ist und dass das Luftgebläse (4) mit einer höheren zweiten Drehzahl D2 läuft, sofern der Gasvolumenstrom grösser als der vorbestimmte Wert VG1 ist.Control and regulating device (1) according to claim 1, characterized in that only a single gas pressure switch (7) is present and that the control and regulating device (1) as a function of the signal supplied by the gas pressure switch (7) the air blower (4) so controls that the air blower (4) runs at a first speed D 1 if the gas volume flow is less than a predetermined value V G1 and that the air blower (4) runs at a higher second speed D 2 if the gas volume flow is greater than the predetermined Value is V G1 . Gasdruckwächter (7), der bei einem Gasbrenner (2) mit einem Steuer- und Regelgerät (1) nach Anspruch 2 verwendet wird, dadurch gekennzeichnet, dass der Schaltpunkt des Gasdruckwächters (7) so eingestellt ist, dass bei dem im Betrieb des Gasbrenners (2), mit Ausnahme des Betriebs bei Nennlast, vorwiegend oder maximal benötigten Gasvolumenstrom das Luftgebläse (4) mit der Drehzahl D1 dreht.Gas pressure monitor (7), which is used in a gas burner (2) with a control and regulating device (1) according to claim 2, characterized in that the switching point of the gas pressure monitor (7) is set such that when the gas burner is in operation ( 2), with the exception of operation at nominal load, predominantly or maximum required gas volume flow, the air blower (4) rotates at speed D 1 . Steuer- und Regelgerät (1) nach Anspruch 1, dadurch gekennzeichnet, dass ein Gasdruckwächter (7) mit mehreren Schaltpunkten vorhanden ist, wobei jeder Schaltpunkt eine Umschaltung der Drehzahl des Luftgebläses (4) auslöst.Control and regulating device (1) according to claim 1, characterized in that a gas pressure switch (7) with a plurality of switching points is present, each switching point triggering a change in the speed of the air blower (4).
EP97120267A 1997-03-05 1997-11-19 Control device for a gas burner Expired - Lifetime EP0863367B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP97103586 1997-03-05
EP97103586 1997-03-05

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EP0863367A1 true EP0863367A1 (en) 1998-09-09
EP0863367B1 EP0863367B1 (en) 2002-01-30

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EP (1) EP0863367B1 (en)
AT (1) ATE212703T1 (en)
DE (1) DE59706232D1 (en)
ES (1) ES2171246T3 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1843095A2 (en) * 2006-04-07 2007-10-10 Thomas & Betts International, Inc. System and method for combustion-air modulation of a gas-fired heating system
EP2685168A1 (en) * 2012-07-13 2014-01-15 Honeywell Technologies Sarl Method and controller for operating a gas burner
CN113374912A (en) * 2021-06-09 2021-09-10 广州市东霸节能科技有限公司 Method and device for adjusting ratio of air blast and fuel gas of commercial stove
CN114517988A (en) * 2020-11-17 2022-05-20 云米互联科技(广东)有限公司 Control method of gas water heater, gas water heater and readable storage medium

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GB2042191A (en) * 1979-01-18 1980-09-17 United Gas Industries Ltd Air or gas-flow detecting device
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JPS58224227A (en) * 1982-06-21 1983-12-26 Matsushita Electric Ind Co Ltd Combustion control device
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JPH0650533A (en) * 1992-07-31 1994-02-22 Noritz Corp Combustion control device
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1843095A2 (en) * 2006-04-07 2007-10-10 Thomas & Betts International, Inc. System and method for combustion-air modulation of a gas-fired heating system
EP1843095A3 (en) * 2006-04-07 2010-01-20 Thomas & Betts International, Inc. System and method for combustion-air modulation of a gas-fired heating system
US7802984B2 (en) 2006-04-07 2010-09-28 Thomas & Betts International, Inc. System and method for combustion-air modulation of a gas-fired heating system
EP2685168A1 (en) * 2012-07-13 2014-01-15 Honeywell Technologies Sarl Method and controller for operating a gas burner
CN114517988A (en) * 2020-11-17 2022-05-20 云米互联科技(广东)有限公司 Control method of gas water heater, gas water heater and readable storage medium
CN114517988B (en) * 2020-11-17 2023-11-03 云米互联科技(广东)有限公司 Control method of gas water heater, gas water heater and readable storage medium
CN113374912A (en) * 2021-06-09 2021-09-10 广州市东霸节能科技有限公司 Method and device for adjusting ratio of air blast and fuel gas of commercial stove

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ES2171246T3 (en) 2002-09-01
DE59706232D1 (en) 2002-03-14
EP0863367B1 (en) 2002-01-30
ATE212703T1 (en) 2002-02-15

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