EP0567060A1 - Procédé pour commander un brûleur à gaz avec un ventilateur - Google Patents

Procédé pour commander un brûleur à gaz avec un ventilateur Download PDF

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Publication number
EP0567060A1
EP0567060A1 EP93106370A EP93106370A EP0567060A1 EP 0567060 A1 EP0567060 A1 EP 0567060A1 EP 93106370 A EP93106370 A EP 93106370A EP 93106370 A EP93106370 A EP 93106370A EP 0567060 A1 EP0567060 A1 EP 0567060A1
Authority
EP
European Patent Office
Prior art keywords
burner
differential pressure
certain
fan
value
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.)
Withdrawn
Application number
EP93106370A
Other languages
German (de)
English (en)
Inventor
Joachim Berg
Thomas Kupka
Oliver Reifenhäuser
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.)
Vaillant GmbH
Original Assignee
Joh Vaillant GmbH and Co
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
Priority claimed from AT0080392A external-priority patent/AT398622B/de
Priority claimed from AT194792A external-priority patent/AT401570B/de
Application filed by Joh Vaillant GmbH and Co filed Critical Joh Vaillant GmbH and Co
Publication of EP0567060A1 publication Critical patent/EP0567060A1/fr
Withdrawn legal-status Critical Current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
    • F23N5/00—Systems for controlling combustion
    • F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel
    • F23N5/184—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel 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
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/242—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electronic 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
    • 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
    • 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
    • F23N2223/00—Signal processing; Details thereof
    • F23N2223/08—Microprocessor; Microcomputer
    • 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
    • F23N2231/00—Fail safe
    • F23N2231/26—Fail safe for clogging air inlet
    • 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 according to the preamble of claim 1.
  • the aim of the invention is to propose a method of the type mentioned at the outset with which it is possible to keep the burner output constant even when the flow resistances change.
  • claims 3 and 4 allow faults to be reliably detected and further burner operation prevented.
  • the differential pressure across the throttle point is reduced and the burner output is reduced. If the differential pressure drops to a certain minimum value, the speed of the fan is slowly increased, and with it the output of the burner, until a certain maximum value of the differential pressure is reached. In this way, the decrease in the burner output caused by an increase in the flow resistances is compensated for, so that an essentially constant burner output also results with increasing flow resistances.
  • a burner 11 which is located in a vacuum chamber 9, which in turn is surrounded by a housing 10.
  • This burner 11 is acted upon by a blower 3 with a gas-air mixture, so it works as a gas-blown burner.
  • the gas is fed in the area of an air throttle 1 into an intake port 12 of the blower 3 via a gas line 18, in which a gas solenoid valve 29 is arranged.
  • the static pressure p 2 is removed via a measuring connection 13 and is supplied to a pressure sensor 2 with an analog output.
  • This pressure sensor 2 is provided with a further pressure connection 14 which receives the pressure p 1 prevailing in the interior of the vacuum chamber 9 via an opening 60.
  • the differential pressure p x from the pressures p2 and p1, a gas-air composite control 8 is supplied, which ensures a corresponding gas-air ratio.
  • the burner 11 designed as a fall burner is arranged at the top in a combustion chamber 19, in which a heat exchanger 4 is also located below the burner.
  • This combustion chamber 19 is provided below the heat exchanger with a funnel-shaped collector 20, to which a condensate drain 21, in which a siphon 22 is arranged and an exhaust pipe 5, the outlet of which is located at the top, are connected.
  • This exhaust gas line 5 concentrically passes through a supply air line 6, via which air can get into the interior of the vacuum chamber 9.
  • the heat exchanger 4 is hydraulically connected in series with the double-walled, cooled combustion chamber 19, which is connected to a feed line 23.
  • Contamination of the heat exchanger 4 or formation of condensate in the heat exchanger 4 increases the flow resistance in the exhaust gas path of the burner, as a result of which the throughput of the gas-air mixture through the fan 3 decreases and the output of the burner 11 decreases.
  • the desired differential pressure -p w required to maintain the intended power can be achieved again.
  • This setpoint differential pressure -p w is calculated using a programmed algorithm from the required burner output, which in turn is derived from the flow setpoint temperature W, which is given to the controller 7 via a setpoint generator 53, and the flow setpoint temperature X calculated.
  • the actual speed value n x is constantly - cf. Fig. 2 - with a from the difference between the desired flow temperature value W and the actual flow temperature value X, which comes from the flow temperature sensor 17 via line 16, calculated in a computing element 42, the load-dependent permissible speed n max in one Comparator 38 compared. As soon as the speed n max is exceeded, a comparison element 44 checks whether a count value A is equal to zero. When the device is started up, the value A is zero. If so, both a timer 31, which measures the time t 1 in seconds after exceeding n max , and a counter 32, which sets the count A from zero to one, are activated.
  • the heater 26 is then switched off so that the gas solenoid valve 29 is closed via the control line 52 and the motor 27 of the fan 3 is switched off via the control line 18 after a certain time (burner OFF function).
  • another timer 34 measures the time t2 in seconds since this shutdown. If a comparator 35 detects that the switch-off time t OFF , which can be set by the installer on the heater 26 via a setpoint potentiometer 33, is exceeded, the speed n x of the motor 27 is increased via the control line 18 as long as until a value P Start in a memory 54 has exceeded the Up x value. Then the gas solenoid valve 29 is opened via the control line 52 and the ignition device 36 is activated via the line 37 (burner ON function).
  • the counter 32 adds the count value A located in a count value memory 39 by 1 and stores this value again in the number memory 39. If it is now recognized in a third comparison element 40 that this count value A is greater than the non-variable numerical value B located in a further memory 41, a further comparison element 45 becomes active.
  • This comparator 45 compares the current time t 1 with a time value t max that can be changed by the installer on a time transmitter 46. If t max is greater than t 1, the count value for t 1 and the numerical value for A are first set to zero in a reset 47 and the burner OFF function described above is run through.
  • This function is also activated when the count value A is still smaller than the numerical value B located in the memory 41. It is found in the comparator 45 that the time t 1 in the B + 1 times the maximum speed n max is exceeded, is less than or equal to Count value t max , then the fault valve 66 switches off the solenoid valve 29 via a fault switch, the control line 52, the supply voltage for the motor 27, via the control line 18 and the burner ON function is not activated until an interference suppressor 48 is actuated and via a suppressor 67 in the reset 47 t1 and A are set to zero. During the entire time, a code number is shown on a display 55, which explains the cause of the shutdown.
  • n max which is dependent on the burner load required, is shown, as is the case if the required burner load the actual speed would have to be raised above this. In this case the heater switches off.
  • the pressure sensor 2 transmits the electrical signal Upx to the analog / digital converter 64 located in the device controller 7. This is connected to the comparator 58, from which the value in the number memory 62 is queried. Furthermore, the adder 59, which queries the value in the number memory 65, intervenes in the control of the motor 27 via the signal line 71. In the logical sequence are the comparator 60, which queries the value in the number memory 63 and the comparator 70, which queries the value in the number memory 53 and the speed nx via the signal line 49 from the Hall sensor 50, connected in series. At the end of these logic operations, the fault element 66 and the display 55.
  • the function is as follows:
  • the pressure sensor 2 uses the applied pressure difference from p1 and p2 to generate an analog electrical signal Upx, which is converted in the analog / digital converter 64 into the numerical value px.
  • this value px is then permanently compared with the numerical value pmin stored in the number memory 62 and still to be determined, whether the condition less than / equal to is met. If this is the case, as long as the desired speed value nw is increased via the signal line 71 by a value n in the number memory 65 in the adder 59 until the value px is greater than the value pmax stored in the number memory 63. This is checked in comparator 60.
  • the comparator 70 If it is now recognized in the comparator 70 that the current actual speed nx, which is transmitted from the Hall sensor 50 on the blower motor 27 via the signal line 49 to the device control 7, is lower than the limit speed n limit stored in the number memory 53, only then then again Target speed value nw changed until either the demand-dependent control requires it, or the differential pressure value px in the comparator 58 is again recognized as being smaller than pmin. If, however, the current actual speed nx is greater than the numerical value n limit stored in the number memory 53, the device is switched off in a locking manner by the fault element and an indication of the present fault appears on the display 55.
  • FIG. 6 shows the relationship between the differential pressure px over the operating time t of the burner 11.
  • the differential pressure drops slowly due to the deposits or condensate formation in the heat exchanger 4 or any increase in the flow losses on the exhaust gas side until it is less than or equal to the comparator 58 pmin is recognized.
  • the setpoint speed is then increased by n in the adder 59 until the value of the differential pressure px is greater than the numerical value pmax. This procedure can be repeated until the actual speed nx is detected in the comparator 70 not less than n limits . In this case, the heater 26 switches off and goes into the malfunction operating state.
  • FIG. 7 shows the speed curve of the actual speed nx over the operating time of the burner 11 for the case described above. If the numerical value pmin is undershot, the target speed nw is increased by n until the condition, px is greater pmax, is met. If pmax is exceeded, the target speed remains constant until either the value pmin falls below px again or a different load is demanded by the device controller 7. If the limit speed n limit is now exceeded when the target speed nw is raised again, then the heater 26 switches off and goes into the malfunction operating state.

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)
EP93106370A 1992-04-21 1993-04-20 Procédé pour commander un brûleur à gaz avec un ventilateur Withdrawn EP0567060A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AT803/92 1992-04-21
AT0080392A AT398622B (de) 1992-04-21 1992-04-21 Verfahren zur steuerung eines gebläsebrenners
AT1947/92 1992-10-02
AT194792A AT401570B (de) 1992-10-02 1992-10-02 Verfahren zur steuerung eines gas-gebläsebrenners

Publications (1)

Publication Number Publication Date
EP0567060A1 true EP0567060A1 (fr) 1993-10-27

Family

ID=25593961

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93106370A Withdrawn EP0567060A1 (fr) 1992-04-21 1993-04-20 Procédé pour commander un brûleur à gaz avec un ventilateur

Country Status (2)

Country Link
EP (1) EP0567060A1 (fr)
DE (1) DE4312801A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996025629A1 (fr) * 1995-02-16 1996-08-22 British Gas Plc Regulation d'un systeme de combustion
EP0857916A1 (fr) * 1997-02-06 1998-08-12 Electrowatt Technology Innovation AG Dispositif de commande pour un brûleur
EP0890790A1 (fr) * 1997-07-08 1999-01-13 Electrowatt Technology Innovation AG Dispositif de commande, notamment un automate à brûleur, pour un brûleur à air soufflé
WO2000070267A1 (fr) * 1999-05-14 2000-11-23 Honeywell B.V. Dispositif de regulation pour bruleur de gaz
WO2003023284A1 (fr) * 2001-09-10 2003-03-20 Varidigm Corporation Commande de chauffage et de refroidissement a sortie variable
EP1475580A1 (fr) * 2003-05-07 2004-11-10 Robert Bosch Gmbh Dispositif ou procédé pour adapter à la géométrie d'un système d'échappement ou d'un système d'air la puissance d'un ventilateur d'un dispositif de chauffage ou d'un dispositif de ventilation
EP2469168A1 (fr) * 2010-12-24 2012-06-27 Robert Bosch GmbH Procédé de fonctionnement d'un brûleur à gaz pour un appareil de chauffage
DE10159033B4 (de) * 2000-12-01 2012-08-16 Vaillant Gmbh Regelungsverfahren für Heizungsgeräte
EP2733436A3 (fr) * 2012-11-19 2017-06-21 A.O. Smith Corporation Chauffe-eau et sonde de pression pour un chauffe-eau

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4303700C2 (de) * 1993-02-09 1998-02-26 Buderus Heiztechnik Gmbh Vorrichtung zur Regelung des Gas-Luft-Verhältnisses bei einem Gasvormischbrenner
DE102021109473A1 (de) 2021-04-15 2022-11-03 Vaillant Gmbh Verfahren zum Prüfen einer Abgasanlage eines Heizgerätes

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4706881A (en) * 1985-11-26 1987-11-17 Carrier Corporation Self-correcting microprocessor control system and method for a furnace
EP0315288A1 (fr) * 1987-11-04 1989-05-10 Econosto N.V. Appareil de chauffage
GB2237665A (en) * 1989-10-31 1991-05-08 Potterton Int Ltd Boiler control

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4706881A (en) * 1985-11-26 1987-11-17 Carrier Corporation Self-correcting microprocessor control system and method for a furnace
EP0315288A1 (fr) * 1987-11-04 1989-05-10 Econosto N.V. Appareil de chauffage
GB2237665A (en) * 1989-10-31 1991-05-08 Potterton Int Ltd Boiler control

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 012, no. 485 (M-777)19. Dezember 1988 & JP-A-63 204 018 ( MATSUSHITA ELECTRIC ) 23. August 1988 *
PATENT ABSTRACTS OF JAPAN vol. 014, no. 266 (M-982)8. Juni 1990 & JP-A-02 075 816 ( MATSUSHITA ELECTRIC ) 15. März 1990 *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU696298B2 (en) * 1995-02-16 1998-09-03 Bg Plc Controlling a combustion system
WO1996025629A1 (fr) * 1995-02-16 1996-08-22 British Gas Plc Regulation d'un systeme de combustion
EP0857916A1 (fr) * 1997-02-06 1998-08-12 Electrowatt Technology Innovation AG Dispositif de commande pour un brûleur
EP0890790A1 (fr) * 1997-07-08 1999-01-13 Electrowatt Technology Innovation AG Dispositif de commande, notamment un automate à brûleur, pour un brûleur à air soufflé
WO2000070267A1 (fr) * 1999-05-14 2000-11-23 Honeywell B.V. Dispositif de regulation pour bruleur de gaz
DE10159033B4 (de) * 2000-12-01 2012-08-16 Vaillant Gmbh Regelungsverfahren für Heizungsgeräte
WO2003023284A1 (fr) * 2001-09-10 2003-03-20 Varidigm Corporation Commande de chauffage et de refroidissement a sortie variable
US6866202B2 (en) 2001-09-10 2005-03-15 Varidigm Corporation Variable output heating and cooling control
US7293718B2 (en) 2001-09-10 2007-11-13 Varidigm Corporation Variable output heating and cooling control
EP1475580A1 (fr) * 2003-05-07 2004-11-10 Robert Bosch Gmbh Dispositif ou procédé pour adapter à la géométrie d'un système d'échappement ou d'un système d'air la puissance d'un ventilateur d'un dispositif de chauffage ou d'un dispositif de ventilation
EP2469168A1 (fr) * 2010-12-24 2012-06-27 Robert Bosch GmbH Procédé de fonctionnement d'un brûleur à gaz pour un appareil de chauffage
EP2733436A3 (fr) * 2012-11-19 2017-06-21 A.O. Smith Corporation Chauffe-eau et sonde de pression pour un chauffe-eau
US10281351B2 (en) 2012-11-19 2019-05-07 A. O. Smith Corporation Water heater and pressure probe for a water heater

Also Published As

Publication number Publication date
DE4312801A1 (de) 1993-10-28

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