EP0825385A2 - Control device for a burner - Google Patents

Control device for a burner Download PDF

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Publication number
EP0825385A2
EP0825385A2 EP97113372A EP97113372A EP0825385A2 EP 0825385 A2 EP0825385 A2 EP 0825385A2 EP 97113372 A EP97113372 A EP 97113372A EP 97113372 A EP97113372 A EP 97113372A EP 0825385 A2 EP0825385 A2 EP 0825385A2
Authority
EP
European Patent Office
Prior art keywords
temperature
burner
boiler
control
temperature sensor
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
EP97113372A
Other languages
German (de)
French (fr)
Other versions
EP0825385B1 (en
EP0825385A3 (en
Inventor
Christop Fieback
Volker Kleine
Frank Kutschback
Jörg Lindemann
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.)
Elster Kromschroeder GmbH
Original Assignee
G Kromschroeder 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 G Kromschroeder AG filed Critical G Kromschroeder AG
Priority to DE29724551U priority Critical patent/DE29724551U1/en
Publication of EP0825385A2 publication Critical patent/EP0825385A2/en
Publication of EP0825385A3 publication Critical patent/EP0825385A3/en
Application granted granted Critical
Publication of EP0825385B1 publication Critical patent/EP0825385B1/en
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
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • 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
    • F23N2235/14—Fuel valves electromagnetically operated
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2241/00—Applications
    • F23N2241/04—Heating water

Definitions

  • the control element serves to control the boiler temperature on the to keep predetermined value. If it is a two-point control, so the fuel supply is switched on and off.
  • a modulating control can, for example via a variable speed fan be arranged in the air line, a Gas / air compound controller the gas pressure the changeable air pressure tracks.
  • the safety switching element serves the fuel supply to interrupt when the boiler temperature reaches a predetermined Value exceeds.
  • This can be a safety temperature limiter (STB) and optionally an additional one Act safety temperature monitor (STW).
  • the invention has for its object a simpler and to create a more cost-effective control arrangement.
  • the above-mentioned control arrangement is used to solve this problem characterized in that the Safety switching element to the temperature sensor of the control element is connected, this temperature sensor is designed such that it is one of the current boiler temperature provides a clearly assignable signal.
  • this temperature sensor not only controls the boiler, but also the safety temperature monitoring. Dispensing with at least one additional temperature sensor and the associated wiring effort leads to a significant reduction in costs. It is in continuing education the invention possible, only with an STB or in addition also work with a STW.
  • the safety switching element represents a circuit that meet the requirements of the DIN / EN standards for fault safety must suffice. However, only that is monitored Exceeding a temperature threshold.
  • the control element must do not meet the relevant standards. However, it has to process temperature dependent analog signals to the burner output to regulate intermittently or modulating.
  • the temperature sensor used according to the invention is designed such that it is one of the current boiler temperature delivers clearly assignable signal, it fulfills both the requirements imposed by the control element and the requirements of the safety switching element.
  • control element in its speed Control variable air blowers.
  • the invention is based on a preferred Embodiment in connection with the accompanying Drawing explained in more detail.
  • the figure shows in a schematic Representation of the circuit of the control arrangement.
  • the control arrangement comprises a control element 1 which is connected to a Temperature sensor 2 and an actuator 3 in the form of a Electromagnet is connected. Actuator 3 is actuated a valve 4, which is arranged in a fuel line 5 is.
  • the fuel line 5 leads to a not shown Brenner, which is also not shown Boiler heated. Its boiler temperature is determined by the Detected temperature sensor 2, which is arranged in the flow of the boiler is. The output signal from the sensor is the current one Boiler temperature clearly assigned.
  • valve 4 is therefore in Open or closed depending on the boiler temperature.
  • the control arrangement also includes a safety switching element 6, which acts as a safety temperature monitor (STW) and Safety temperature limiter (STB) works.
  • STW safety temperature monitor
  • STB Safety temperature limiter
  • the safety switching element 6 is also connected to the temperature sensor 2 and connected to the actuator 3 of the valve 4.
  • valve 4 is closed. Then the boiler temperature drops below the predetermined maximum value, the valve 4 via the control element 1 open again if there is a heat request from the Consumer. Switches at a correspondingly higher If the temperature is also the STB, this is the case when the temperature drops the boiler temperature an automatic start of the burner not possible anymore. Rather, the safety switching element 6 must must be unlocked manually beforehand.
  • the safety switching element 6 also be trained as an STB alone.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Combustion (AREA)

Abstract

The burner regulator uses a temperature sensor (2) for detecting the boiler temperature, coupled to both a regulator element (1) and a safety element (6), which each operate a valve (4) inserted in the fuel line (5) to the burner. The regulator element controls the valve to maintain the required boiler temperature, the safety element blocking the valve to cut out the fuel feed for the burner when a maximum boiler temperature is exceeded.

Description

Die Erfindung betrifft eine Regelanordnung für einen Brenner, der an eine Brennstoffleitung angeschlossen ist und einen Heizkessel beheizt, mit

  • einem Temperatursensor zum Erfassen der Kesseltemperatur,
  • einem Regelglied, das an den Temperatursensor angeschlossen ist und ein die Brennerleistung regelndes Ausgangssignal liefert, und
  • mindestens einem temperaturabhängigen Sicherheitsschaltglied, das an ein Stellglied für ein in der Brennstoffleitung angeordnetes Ventil angeschlossen ist.
The invention relates to a control arrangement for a burner, which is connected to a fuel line and heats a boiler, with
  • a temperature sensor to record the boiler temperature,
  • a control element which is connected to the temperature sensor and supplies an output signal which regulates the burner output, and
  • at least one temperature-dependent safety switching element which is connected to an actuator for a valve arranged in the fuel line.

Das Regelglied dient dazu, die Kesseltemperatur auf dem vorgegebenen Wert zu halten. Handelt es sich um eine Zweipunktregelung, so wird die Brennstoffzufuhr ein- und ausgeschaltet. Eine modulierende Regelung kann beispielsweise über ein in der Drehzahl veränderliches Gebläse durchgeführt werden, das in der Luftleitung angeordnet ist, wobei ein Gas/Luft-Verbundregler den Gasdruck dem veränderbaren Luftdruck nachführt.The control element serves to control the boiler temperature on the to keep predetermined value. If it is a two-point control, so the fuel supply is switched on and off. A modulating control can, for example via a variable speed fan be arranged in the air line, a Gas / air compound controller the gas pressure the changeable air pressure tracks.

Das Sicherheitsschaltglied dient dazu, die Brennstoffzufuhr zu unterbrechen, wenn die Kesseltemperatur einen vorgegebenen Wert übersteigt. Dabei kann es sich um einen Sicherheitstemperaturbegrenzer (STB) und wahlweise um einen zusätzlichen Sicherheitstemperaturwächter (STW) handeln.The safety switching element serves the fuel supply to interrupt when the boiler temperature reaches a predetermined Value exceeds. This can be a safety temperature limiter (STB) and optionally an additional one Act safety temperature monitor (STW).

Hat der STW abgeschaltet und sinkt anschließend die Kesseltemperatur unter den vorgegebenen Höchstwert, so schaltet das Regelglied die Brennstoffzufuhr automatisch wieder ein. Die Schalttemperatur des STB liegt höher als die des STW. Wird sie überschritten, so wird nicht nur die Brennstoffzufuhr unterbrochen, sondern es wird auch das Sicherheitsschaltglied verriegelt. Ein späteres Sinken der Kesseltemperatur unter den vorgegebenen Höchstwert führt dann nicht mehr automatisch zum Einschalten der Brennstoffzufuhr. Vielmehr muß das Sicherheitsschaltglied manuell entriegelt werden.Has the STW switched off and then the boiler temperature drops below the specified maximum value, switches the control element automatically switches the fuel supply back on. The switching temperature of the STB is higher than that of the STW. If it is exceeded, then not only the fuel supply interrupted, but it also becomes the safety switching element locked. A later decrease in the boiler temperature then does not lead below the specified maximum value more automatically to switch on the fuel supply. Much more the safety switching element must be unlocked manually.

Bei bisher bekannten Regelanordnungen war es üblich, sowohl dem Regelglied als auch dem Sicherheitsschaltglied je einen gesonderten Temperatursensor zuzuordnen. Kam zusätzlich zum STB ein STW zum Einsatz, so waren allein für das Sicherheitsschaltglied zwei gesonderte Temperatursensoren erforderlich. Dies bedingte einen erheblichen apparativen Aufwand, verbunden mit erhöhtem Verdrahtungsaufwand im Kessel, wodurch zusätzliche Kosten entstanden.In previously known control arrangements, it was common for both the control element and the safety switching element each assign a separate temperature sensor. Came in addition an STW was used for the STB, so that was for Safety switching element two separate temperature sensors required. This required considerable equipment Effort combined with increased wiring effort in the boiler which incurred additional costs.

Der Erfindung liegt die Aufgabe zugrunde, eine einfachere und kostengünstigere Regelanordnung zu schaffen.The invention has for its object a simpler and to create a more cost-effective control arrangement.

Zur Lösung dieser Aufgabe ist die eingangs genannte Regelanordnung erfindungsgemäß dadurch gekennzeichnet, daß das Sicherheitsschaltglied an den Temperatursensor des Regelgliedes angeschlossen ist, wobei dieser Temperatursensor derart ausgebildet ist, daß er ein der momentanen Kesseltemperatur eindeutig zuzuordnendes Signal liefert.The above-mentioned control arrangement is used to solve this problem characterized in that the Safety switching element to the temperature sensor of the control element is connected, this temperature sensor is designed such that it is one of the current boiler temperature provides a clearly assignable signal.

Dieser Tempertursensor bedient also nicht nur die Kesselregelung, sondern auch die Sicherheitstemperaturüberwachung. Der Verzicht auf mindestens einen zusätzlichen Temperatursensor und den zugehörigen Verdrahtungsaufwand führt zu einer beträchtlichen Kostensenkung. Dabei ist es in Weiterbildung der Erfindung möglich, nur mit einem STB oder zusätzlich auch noch mit einem STW zu arbeiten.So this temperature sensor not only controls the boiler, but also the safety temperature monitoring. Dispensing with at least one additional temperature sensor and the associated wiring effort leads to a significant reduction in costs. It is in continuing education the invention possible, only with an STB or in addition also work with a STW.

Das Sicherheitsschaltglied stellt eine Schaltung dar, die den Anforderungen der DIN/EN-Normen an die Fehlersicherheit genügen muß. Überwacht wird allerdings lediglich das Überschreiten einer Temperaturschwelle. Das Regelglied muß den diesbezüglichen Normen nicht genügen. Allerdings muß es temperaturabhängige Analogsignale verarbeiten, um die Brennerleistung intermittierend oder modulierend zu regeln. Da der erfindungsgemäß zum Einsatz kommende Temperatursensor derart ausgebildet ist, daß er ein der momentanen Kesseltemperatur eindeutig zuzuordnendes Signal liefert, erfüllt er sowohl die vom Regelglied gestellten Anforderungen als auch die Anforderungen des Sicherheitsschaltglieds.The safety switching element represents a circuit that meet the requirements of the DIN / EN standards for fault safety must suffice. However, only that is monitored Exceeding a temperature threshold. The control element must do not meet the relevant standards. However, it has to process temperature dependent analog signals to the burner output to regulate intermittently or modulating. There the temperature sensor used according to the invention is designed such that it is one of the current boiler temperature delivers clearly assignable signal, it fulfills both the requirements imposed by the control element and the requirements of the safety switching element.

Für eine Zweipunktregelung der Brennerleistung wird in Weiterbildung der Erfindung vorgeschlagen, daß das Regelglied mit seinem Ausgang an das Stellglied für das in der Brennstoffleitung angeordnete Ventil angeschlossen ist. Dieses Ventil dient also sowohl der Regelung als auch der Sicherheitsabschaltung. Die Anordnung ist dementsprechend unkompliziert.For a two-point control of the burner output, in Further development of the invention proposed that the control element with its output to the actuator for that in the Fuel line arranged valve is connected. This The valve is used for both regulation and safety shutdown. The arrangement is accordingly straightforward.

Alternativ kann zur modulierenden Regelung mittels eines Gas/Luft-Verbundreglers das Regelglied ein in seiner Drehzahl veränderliches Luftgebläse steuern.Alternatively, for modulating control using a Gas / air compound controller the control element in its speed Control variable air blowers.

Die Erfindung wird im folgenden anhand eines bevorzugten Ausführungsbeispiels im Zusammenhang mit der beiliegenden Zeichnung näher erläutert. Die Figur zeigt in schematischer Darstellung die Schaltung der Regelanordnung.The invention is based on a preferred Embodiment in connection with the accompanying Drawing explained in more detail. The figure shows in a schematic Representation of the circuit of the control arrangement.

Die Regelanordnung umfaßt ein Regelglied 1, das an einen Temperatursensor 2 sowie an ein Stellglied 3 in Form eines Elektromagneten angeschlossen ist. Das Stellglied 3 betätigt ein Ventil 4, welches in einer Brennstoffleitung 5 angeordnet ist. Die Brennstoffleitung 5 führt zu einem nicht dargestellten Brenner, der einen ebenfalls nicht dargestellten Heizkessel beheizt. Dessen Kesseltemperatur wird von dem Temperatursensor 2 erfaßt, der im Vorlauf des Kessels angeordnet ist. Das Ausgangssignal des Sensors ist der momentanen Temperatur des Kessels eindeutig zugeordnet.The control arrangement comprises a control element 1 which is connected to a Temperature sensor 2 and an actuator 3 in the form of a Electromagnet is connected. Actuator 3 is actuated a valve 4, which is arranged in a fuel line 5 is. The fuel line 5 leads to a not shown Brenner, which is also not shown Boiler heated. Its boiler temperature is determined by the Detected temperature sensor 2, which is arranged in the flow of the boiler is. The output signal from the sensor is the current one Boiler temperature clearly assigned.

Im vorliegenden Fall handelt es sich um eine stufenwiese Regelung oder Zweipunktregelung. Das Ventil 4 wird also in Abhängigkeit von der Kesseltemperatur geöffnet oder geschlossen.In the present case it is a step meadow Regulation or two-point regulation. The valve 4 is therefore in Open or closed depending on the boiler temperature.

Die Regelanordnung umfaßt ferner ein Sicherheitsschaltglied 6, welches als Sicherheitstemperaturwächter (STW) und Sicherheitstemperaturbegrenzer (STB) arbeitet. Das Sicherheitsschaltglied 6 ist ebenfalls an den Temperatursensor 2 sowie an das Stellglied 3 des Ventils 4 angeschlossen. The control arrangement also includes a safety switching element 6, which acts as a safety temperature monitor (STW) and Safety temperature limiter (STB) works. The safety switching element 6 is also connected to the temperature sensor 2 and connected to the actuator 3 of the valve 4.

Spricht der STW an, so wird das Ventil 4 geschlossen. Sinkt anschließend die Kesseltemperatur wieder unter den vorgegebenen Höchstwert, so kann das Ventil 4 über das Regelglied 1 erneut öffnen, sofern eine Wärmeanforderung des Verbrauchers vorliegt. Schaltet bei entsprechend höherer Temperatur auch der STB, so ist bei anschließendem Absinken der Kesseltemperatur ein automatisches Starten des Brenners nicht mehr möglich. Das Sicherheitsschaltglied 6 muß vielmehr vorher manuell entriegelt werden.If the STW responds, valve 4 is closed. Then the boiler temperature drops below the predetermined maximum value, the valve 4 via the control element 1 open again if there is a heat request from the Consumer. Switches at a correspondingly higher If the temperature is also the STB, this is the case when the temperature drops the boiler temperature an automatic start of the burner not possible anymore. Rather, the safety switching element 6 must must be unlocked manually beforehand.

Im Rahmen der Erfindung sind durchaus Abwandlungsmöglichkeiten gegeben. So kann das Sicherheitsschaltglied 6 auch allein als STB ausgebildet sein.Within the scope of the invention there are possibilities for modification given. The safety switching element 6 also be trained as an STB alone.

Claims (4)

Regelanordnung für einen Brenner, der an eine Brennstoffleitung (5) angeschlossen ist und einen Heizkessel beheizt, mit einem Temperatursensor (2) zum Erfassen der Kesseltemperatur, einem Regelglied (1), das an den Temperatursensor angeschlossen ist und ein die Brennerleistung regelndes Ausgangssignal liefert, und mindestens einem temperaturabhängigen Sicherheitsschaltglied (6), das an ein Stellglied (3) für ein in der Brennstoffleitung (5) angeordnetes Ventil (4) angeschlossen ist,
   dadurch gekennzeichnet,
   daß das Sicherheitsschaltglied (6) an den Temperatursensor (2) des Regelgliedes (1) angeschlossen ist, wobei dieser Temperatursensor (2) derart ausgebildet ist, daß er ein der momentanen Kesseltemperatur eindeutig zuzuordnendes Signal liefert. Control arrangement for a burner, which is connected to a fuel line (5) and heats a boiler, with a temperature sensor (2) for detecting the boiler temperature, a control element (1) which is connected to the temperature sensor and supplies an output signal which regulates the burner output, and at least one temperature-dependent safety switching element (6) which is connected to an actuator (3) for a valve (4) arranged in the fuel line (5),
characterized,
that the safety switching element (6) is connected to the temperature sensor (2) of the control element (1), this temperature sensor (2) being designed in such a way that it supplies a signal which can be clearly assigned to the instantaneous boiler temperature. Regelanordnung nach Anspruch 1, dadurch gekennzeichnet, daß das Sicherheitsschaltglied (6) als STB und wahlweise zusätzlich als STW ausgebildet ist.Control arrangement according to claim 1, characterized in that the safety switching element (6) as STB and optionally is additionally designed as a STW. Regelanordnung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Regelglied (1) mit seinem Ausgang an das Stellglied (3) für das in der Brennstoffleitung (5) angeordnete Ventil (4) angeschlossen ist.Control arrangement according to claim 1 or 2, characterized in that that the control element (1) with its output the actuator (3) for that arranged in the fuel line (5) Valve (4) is connected. Regelanordnung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Regelglied (1) ein in seiner Drehzahl veränderliches Luftgebläse steuert.Control arrangement according to claim 1 or 2, characterized in that that the control element (1) in its speed variable air blower controls.
EP97113372A 1996-08-19 1997-08-02 Control device for a burner Expired - Lifetime EP0825385B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE29724551U DE29724551U1 (en) 1996-08-19 1997-08-02 Control arrangement for a burner

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19633317A DE19633317A1 (en) 1996-08-19 1996-08-19 Control arrangement for a burner
DE19633317 1996-08-19

Publications (3)

Publication Number Publication Date
EP0825385A2 true EP0825385A2 (en) 1998-02-25
EP0825385A3 EP0825385A3 (en) 1999-08-04
EP0825385B1 EP0825385B1 (en) 2006-05-10

Family

ID=7802976

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97113372A Expired - Lifetime EP0825385B1 (en) 1996-08-19 1997-08-02 Control device for a burner

Country Status (3)

Country Link
EP (1) EP0825385B1 (en)
DE (2) DE19633317A1 (en)
ES (1) ES2259186T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002077529A1 (en) * 2001-03-26 2002-10-03 Siemens Building Technologies Ag Method and device for monitoring burners

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0121164A3 (en) * 1983-03-15 1985-11-21 Friedrich Müller Apparatus to control and/or to monitor the heat supply to a water heater and/or a room heat generator
US4470541A (en) * 1983-03-30 1984-09-11 Teledyne Industries, Inc. Control system for low mass hydronic boilers
US4629113A (en) * 1984-10-05 1986-12-16 Rhr, Inc. Furnace controller
AT395776B (en) * 1989-12-12 1993-03-25 Vaillant Gmbh METHOD AND DEVICE FOR MONITORING THE HEATING WATER CIRCUIT IN A GAS WATER HEATER
DE9310458U1 (en) * 1993-03-05 1994-06-30 Landis & Gyr Business Support Electronic control device for gas burners of heating systems

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002077529A1 (en) * 2001-03-26 2002-10-03 Siemens Building Technologies Ag Method and device for monitoring burners
US7090140B2 (en) 2001-03-26 2006-08-15 Siemens Building Technologies Ag Method and device for monitoring burners

Also Published As

Publication number Publication date
EP0825385B1 (en) 2006-05-10
DE59712645D1 (en) 2006-06-14
DE19633317A1 (en) 1998-02-26
ES2259186T3 (en) 2006-09-16
EP0825385A3 (en) 1999-08-04

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