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EP0857916B1 - Methode de commande pour un brûleur - Google Patents

Methode de commande pour un brûleur Download PDF

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Publication number
EP0857916B1
EP0857916B1 EP97120221A EP97120221A EP0857916B1 EP 0857916 B1 EP0857916 B1 EP 0857916B1 EP 97120221 A EP97120221 A EP 97120221A EP 97120221 A EP97120221 A EP 97120221A EP 0857916 B1 EP0857916 B1 EP 0857916B1
Authority
EP
European Patent Office
Prior art keywords
rotation
speed
air
load stage
load
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
EP97120221A
Other languages
German (de)
English (en)
Other versions
EP0857916A1 (fr
Inventor
Harry Kölmel
Eckhard Schwendemann
Rainer Feldmeth
Hans-Dieter Huber
Volker Klumpp
Friedrich Feucht
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.)
Siemens Building Technologies AG
Original Assignee
Siemens Building Technologies AG
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 Siemens Building Technologies AG filed Critical Siemens Building Technologies AG
Publication of EP0857916A1 publication Critical patent/EP0857916A1/fr
Application granted granted Critical
Publication of EP0857916B1 publication Critical patent/EP0857916B1/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
    • 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
    • F23N2225/00—Measuring
    • F23N2225/04—Measuring pressure
    • 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

Definitions

  • the invention relates to a method for operating a control and regulating device for a 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.
  • the LFM1 automatic burner control unit is known from company publication 7433 from Landis & Gyr, the gas-fired heating devices, namely 1- or 2-stage gas burners with or without fan is able to control.
  • the gas burner gets the air necessary for combustion by means of a fan fed, the fan is always at a constant fixed speed during burner operation operated, regardless of whether in the case of a 2-stage burner the first or the second power stage is effective.
  • the speed is selected so that when operating the second power level there is little excess air. This means that when operating the first power level very significant excess of air occurs.
  • EP-A-0 612 960 a control and regulating device for a burner is known, in which the Commissioning of the air blower whose speed is increased at a predetermined rate until the Pressure sensor indicates whether the volume flow is sufficient or not. If not, the Volume flow steadily increased until the pressure sensor indicates that the volume flow is sufficient.
  • EP-A-0 073 717 describes a microprocessor-controlled control and regulating device for operation of a gas-fired heater in which a fan is present in the exhaust gas stream. A Mixture control does not take place.
  • EP-A-0 614 046 describes a control and regulating device for the operation of a gas fan burner known in which the speed of a fan for the air supply is infinitely variable. By means of a additional pressure regulator is a supply of the actual air supply Combustion gas reached. In this way, for all load levels, i.e. for the entire control range, an optimal gas-air ratio can be achieved.
  • the invention has for its object to provide a generic method for operating a control and control device for a burner design that it automatically adjusts to the different flow resistance of the flue gas chimney adapts.
  • FIG. 1 shows a control and regulating device 1 for a burner 2, 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 to the control and regulating device 1 Notification of the required burner output to cover the heat requirement.
  • this heat demand signal controls the control device 1, the continuously adjustable fuel valve 3 to which the fuel delivered by a fuel line 6 is fed to the combustion chamber.
  • the size of the heat demand signal thus determines the degree of opening of the fuel valve 3.
  • the control and regulating device 1 also influences the air blower 4.
  • the control and regulating device 1 controls the air blower 4 at a predetermined speed, preferably at the speed N min (LS) defined later with reference to FIG. 2.
  • An air pressure switch 7 reports via a line 8 to the control and regulating device 1 whether the air volume flow conveyed is capable of generating a predetermined air pressure or not.
  • the control and regulating device 1 now increases the speed in discrete steps until the air pressure switch 7 reports that the air volume flow conveyed is sufficient.
  • the air blower 4 is preferably controlled with a pulse width modulated signal, the pulse width of the signal being proportional to the desired speed. After the minimum speed N (LS) at which the air pressure switch 7 responds has been determined in this way, the control and regulating device 1 calculates the optimal speed N (Lx) for the other load stages Lx.
  • load level LS The load level at which the air pressure switch 7 responds.
  • burner 2 is now started up again at the load level LS, or in the load level “partial load” or in another special, designated “ignition load” Load level.
  • the characteristic curve 9 corresponds to the case of the minimum expected resistance of the exhaust gas chimney
  • Characteristic curve 10 corresponds to the case of the maximum expected resistance of the exhaust gas fireplace.
  • the characteristic 11 corresponds to the current exhaust gas path. It is an unknown quantity and when it is started up for the first time of burner 2 to be determined and checked during subsequent commissioning. There are So to determine the points P (Lx) lying on the characteristic curve 11, which the load levels Lx, in Example the load levels "partial load” and “full load”, corresponding speeds N (Lx) can be removed.
  • the control device 1 therefore stores the speed N min (Lx) on the characteristic curve 9 and the speed N max (Lx) on the characteristic curve 9 for each load stage Lx, or it is by means of a curve representing the characteristic curve 9 or 10 Function predictable.
  • N ( Lx ) N LS - N min ( ls ) N Max ( LS ) - N min ( LS ) * ( N Max ( Lx ) - N min ( Lx )) + N min ( Lx )
  • curved characteristic curves can also be provided.
  • the above formula is then still applicable, but it may also be necessary to use it according to the to modify the curved course of the characteristic curves 9, 10 and 11.
  • control and regulating device 1 controls the air blower 4 at the speed N LS known from the previous start-up and checks whether the air pressure switch 7 reports that the air volume flow is sufficient. If the delivered air volume flow is not sufficient, the correct speed N LS is determined as with the initial start-up and the speed N (Lx) is then recalculated.
  • the control and regulating device 1 also has a memory in which it stores the number m of successive start-ups in which the speed N LS did not have to be increased. If the number m exceeds a predetermined value m 0 , the control and regulating device 1 reduces the rotational speed N LS by a predetermined value and resets the memory content. If a query by the air pressure switch 7 shows that the air volume flow delivered is still sufficient, then the values N (Lx) are also recalculated. If, however, the conveyed air volume flow is no longer sufficient after reducing the speed N LS , the speed N LS is reset to the old value.
  • the speed N LS in the load stage LS is preferably increased in steps of 0.8 percent of a predetermined maximum speed, while the speed N LS is reduced in steps of -0.4 percent.
  • the speed N LS is never greater than the maximum speed N max (LS) corresponding to the characteristic curve 10.
  • a start-up time of, for example, 5 seconds is to be provided, before the speed can be increased further.
  • the increase in speed in increments of 0.8 percent is preferably carried out at intervals of approximately one second.
  • One is particularly important for instantaneous water heaters rapid adaptation of the speeds is desirable so that long cold water does not flow first until after the adaptation of the burner 2 is actually ignited.

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  • 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)
  • Feeding And Controlling Fuel (AREA)

Claims (5)

  1. Procédé d'exploitation d'un appareil de commande et de régulation (1) pour un brûleur (2) dans le cas duquel l'air nécessaire pour la combustion est fourni à la chambre de combustion au moyen d'un ventilateur d'air (4), le débit volumique d'air fourni étant surveillé au moyen d'un organe de surveillance (7) de la pression d'air qui réagit en présence d'un débit volumique d'air comprimé suffisant, le ventilateur d'air (4) pouvant être exploité à au moins deux étages de charge et, à chaque étage de charge, tournant à une vitesse de rotation automatiquement déterminée au moyen de l'appareil de commande et de régulation (1),
    caractérisé par le fait que, lors de la mise en marche du brûleur (2)
    a) le ventilateur d'air (4) tourne à un étage de charge prescrit LS, la vitesse de rotation de l'étage de charge LS correspondant soit à une valeur prescrite de façon fixe soit à la valeur déterminée lors de la mise en marche précédente,
    b) que l'organe de surveillance (7) de la pression d'air réagit lorsque le débit volumique d'air fourni est suffisant pour maintenir la valeur actuelle de la vitesse de rotation de l'étage de charge LS,
    c) que, dans la mesure où l'organe de surveillance (7) de la pression d'air ne réagit pas, la vitesse de rotation du ventilateur d'air (4) croít jusqu'à ce que l'organe de surveillance (7) de la pression d'air réagisse,
    d) que les vitesses de rotation des autres étages de charge, qui se situent sur une caractéristique (11) d'allure définie par l'étage de charge déterminé LS, sont calculées à partir de la valeur de la vitesse de rotation de l'étage de charge LS au moyen d'une première (9) et d'une deuxième (10) caractéristiques prescrites, la première caractéristique (9) indiquant la façon dont le débit volumique (V) dépend de la vitesse de rotation (N) du ventilateur (4) pour une résistance minimale à attendre du chemin des gaz brûlés et la deuxième caractéristique (10) indiquant la façon dont le débit volumique (V) dépend de la vitesse de rotation (N) du ventilateur (4) pour une résistance maximale à attendre du chemin des gaz brûlés et
    e) que la troisième caractéristique se calcule par le moyen que les distances entre les deux caractéristiques prescrites (9, 10), à savoir la première et la deuxième caractéristiques et la troisième caractéristique (11) pour les différents étages de charge se définissent par un rapport mutuel.
  2. Procédé selon la revendication 1, caractérisé par le fait que lors de la mise en marche du brûleur (2), la vitesse de rotation de l'étage de charge LS est réduite d'une valeur prédéterminée dès que, pour un nombre prescrit de mises en marche précédentes, il n'y a eu aucun accroissement de la valeur de la vitesse de rotation de l'étage de charge LS, la réduction étant annulée dès que l'organe de surveillance (7) de la pression de l'air indique que, à la vitesse de rotation réduite, le débit volumique d'air fourni n'est pas suffisant.
  3. Procédé selon la revendication 1 ou 2, caractérisé par le fait que lors de la mise en marche du brûleur (2), l'accroissement ou la réduction de la vitesse de rotation de l'étage de charge LS se fait par pas discrets.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé par le fait que la vitesse de rotation N(Lx) de l'étage de charge Lx se calcule à partir de la vitesse de rotation NLS, déterminée dans l'étage de charge Ls selon l'équation N(Lx) = NLS - Nmin(LS)Nmax(LS) - Nmin(LS) * (Nmax (Lx)- Nmin(Lx)) + Nmin(Lx) les grandeurs satisfaisant à la définition suivante :
    Nmin(LS) = vitesse de rotation minimale dans l'étage de charge LS
    Nmax(LS) = vitesse de rotation maximale dans l'étage de charge LS
    Nmin(Lx) = vitesse de rotation minimale dans l'étage de charge Lx
    Nmax(Lx) = vitesse de rotation maximale dans l'étage de charge Lx,
    et Nmin(LS) et Nmin(Lx) étant déterminées par la première caractéristique (9) et Nmax(LS) et Nmax(Lx) étant déterminées par la deuxième caractéristique (10).
  5. Procédé selon la revendication 4, caractérisé par le fait que la relation entre les vitesses de rotation Nmin(Lx) des différents étages de charge Lx et le débit volumique d'air fourni est représentée sous forme d'une relation linéaire et que la relation entre les vitesses de rotation Nmax(Lx) des différents étages de charge Lx et le débit volumique d'air fourni est représentée sous forme d'une relation linéaire.
EP97120221A 1997-02-06 1997-11-19 Methode de commande pour un brûleur Expired - Lifetime EP0857916B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH00261/97A CH691783A5 (de) 1997-02-06 1997-02-06 Steuer- und Regelgerät für einen Brenner.
CH26197 1997-02-06
CH261/97 1997-02-06

Publications (2)

Publication Number Publication Date
EP0857916A1 EP0857916A1 (fr) 1998-08-12
EP0857916B1 true EP0857916B1 (fr) 2002-04-03

Family

ID=4182980

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97120221A Expired - Lifetime EP0857916B1 (fr) 1997-02-06 1997-11-19 Methode de commande pour un brûleur

Country Status (5)

Country Link
EP (1) EP0857916B1 (fr)
AT (1) ATE215680T1 (fr)
CH (1) CH691783A5 (fr)
DE (1) DE59706857D1 (fr)
ES (1) ES2172732T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004018298A1 (de) * 2004-04-15 2005-11-10 J. Eberspächer GmbH & Co. KG Heizgerät für ein Fahrzeug
NL1031520C2 (nl) * 2006-04-05 2007-10-08 Eco Heating Systems B V Verwarmingsinrichting.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2512179A1 (fr) 1981-08-27 1983-03-04 Sdecc Chaudiere a gaz etanche a tirage force avec regulation par microprocesseur
JPH02101315A (ja) * 1988-10-06 1990-04-13 Iseki & Co Ltd 穀粒乾燥機のバーナ燃焼制御方式
JPH03291411A (ja) * 1990-04-09 1991-12-20 Matsushita Electric Ind Co Ltd 燃焼装置
EP0567060A1 (fr) * 1992-04-21 1993-10-27 Joh. Vaillant GmbH u. Co. Procédé pour commander un brûleur à gaz avec un ventilateur
US5418438A (en) * 1993-02-26 1995-05-23 General Electric Company Draft inducer air flow control
DE9310451U1 (de) 1993-03-05 1994-06-30 Landis & Gyr Business Support Ag, Zug Steuer- bzw. Regeleinrichtung für Gas-Feuerungsautomaten von Heizungsanlagen

Also Published As

Publication number Publication date
EP0857916A1 (fr) 1998-08-12
DE59706857D1 (de) 2002-05-08
ES2172732T3 (es) 2002-10-01
ATE215680T1 (de) 2002-04-15
CH691783A5 (de) 2001-10-15

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