EP1141633B1 - Control device for a burner - Google Patents

Control device for a burner Download PDF

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Publication number
EP1141633B1
EP1141633B1 EP99967911A EP99967911A EP1141633B1 EP 1141633 B1 EP1141633 B1 EP 1141633B1 EP 99967911 A EP99967911 A EP 99967911A EP 99967911 A EP99967911 A EP 99967911A EP 1141633 B1 EP1141633 B1 EP 1141633B1
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EP
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Prior art keywords
control
valve
functions
assigned
valves
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EP99967911A
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German (de)
French (fr)
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EP1141633A1 (en
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Juergen Schmidt
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Robert Bosch GmbH
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Robert Bosch GmbH
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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
    • F23N5/24—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
    • F23N2223/00—Signal processing; Details thereof
    • F23N2223/04—Memory
    • 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
    • F23N2231/00—Fail safe
    • F23N2231/18—Detecting fluid leaks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/20—Warning devices
    • 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
    • F23N2235/18—Groups of two or more valves
    • 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
    • F23N5/12—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods

Definitions

  • the invention relates to a control device for a burner with two Control units that allow one or two in series to each other in one way Fuel medium arranged valves for opening and blocking the way can be controlled and specified with the switch-on state and the blocking state of the valves Status data can be recorded and further control functions for the operation of the Burners are feasible.
  • Such a control device with two control units for a gas burner is out EP 614 047 A1 known.
  • a switch is assigned to each of the control units Series are connected in a control circuit for a relay of a valve.
  • the two Control units are each with shutdown circuits with each of the two switches connected. If an error occurs in one of the two assigned to the switches Switch-off circuits open, at least one switch separates the Control circuit and thus a blocking of the valve.
  • a further control device for a gas burner according to DE 43 42 991 A1 are two identical channels for control with two control units intended. Both channels each have a writable and erasable non-volatile memory in the form of an EEPROM.
  • the two control units work in a master-slave assignment that changes after each heat request, so that the distinguish between current processing cycles. Since the master-slave assignment after changes every cycle, however, both channels as a whole are equal and can perform all functions. Out For safety reasons, the control device must be designed so that the overall system may only be started if both channels are working properly.
  • the construction of this known control device provided on the basis of this requirement on the other hand is relatively expensive.
  • the invention has for its object a control device of the beginning to provide the type mentioned, which meets the required security and is proportionate is simple and inexpensive.
  • control processes and thus the structure of the control device can further simplified by the fact that the subsets of the other functions by means of an encoder and / or by means of parameters of a higher-level Control program can be variably adjusted or expanded or reduced.
  • the memory and data transfer elements not be designed to always perform all possible functions to be able to, but the effort can be in terms of the possible occurring Functions are minimized, with the versatility of the setting options preserved.
  • setting options is further favored by the fact that security-related functions and the other functions on the basis different options are adjustable, at least two of the following Setting options include: one or two valves are available, the valves are only parallel from one control unit or from both Control units controllable; an additional switch-off relay is available or not; an additional control processor is present or not; the Data exchange with the additional control processor takes place via a positive or negative logic.
  • the safe functioning of the control device is supported in that data exchange takes place between the two control units and that the two control units mutually with respect to their states and Monitor functionality.
  • control device The simple structure of the control device is further favored by that one control unit is assigned a higher priority than the other Control unit that only the control unit with the higher priority a heat request is supplied and a writable and erasable non-volatile Memory is allocated with which this control unit communicates, and that this a control unit the heat demand and from the non-volatile memory reads out data to the other control unit.
  • the figure shows a control device for a schematic representation Gas burner, one behind the other as safety valves in a gas supply path a first valve V1 and a further valve V2 are arranged, via which the gas is led to the burner. Parallel to the further valve V2, which, for. B. one Space heating is assigned, a service water valve V3 can still be used be provided, via which gas also reaches the burner, namely when a faucet is operated.
  • the first valve V1 and the second valve V2 are by means of a first control unit C1 and a further control unit C2 controlled, wherein both control units C1, C2 on one of the first valve V1 assigned first valve control A1 and one assigned to the further valve V2 additional valve control A2 with control data for opening or locking of the two valves V1, V2 act.
  • the first control unit C1 is over a control line SL1 with the first valve control A1 and another Control line SL2 connected to the further valve control A2 while the second control unit C2 via a control line SL1 'with the first Valve control A1 and another control line SL2 'with the other Valve control A2 is connected.
  • the two control units C1, C2 via respective return lines RL1, RL2, RL1 'and RL2' via one first evaluation circuit M1 assigned to first valve V1 and one to further evaluation circuit assigned to further valve V2 connected to the switch-on state and the blocking state of the two valves V1 and V2 to capture. Furthermore, the two control units C1 and C2 exchange one Data bus data regarding their respective states and others for both Control units important data.
  • the first control unit C1 has a writable and erasable non-volatile Memory SP in the form of an EEPROM in a mutual data exchange.
  • An unlocking signal of an unlocking E becomes two control units C1, C2 fed.
  • both control units C1, C2 receive signals from ionization or flame detection for a flame test.
  • a Coding K can have different options, such as. B. the presence one or two safety valves, a crossed or parallel control of the two valve controls A1, A2, the presence of an additional Switch-off relay R, the control with or without an additional control processor ST, the data exchange via a positive or negative logic with the Control processor ST, set and other options, such as a safety time and a shutdown time for a leak test.
  • the other control unit C2 is also assigned the ignition Z of the burner.
  • One to both control units Relay C1, C2 connected serves for error monitoring and additional switch-off option.
  • There is also a (controllable) temperature limiter B for the control of valves V1, V2 or the latter assigned evaluation circuits M1, M2 are provided.
  • the section of the control device described above belongs to one Automatic burner control II.
  • This circuit section stands with a peripheral I via a corresponding interface.
  • the periphery I has the already mentioned control processor ST, which with the first control unit C1 in Data exchange stands.
  • the control processor ST via which one Heat demand supplied and z.
  • B. a fault display or burner on display can be effected the periphery I has a control section SA, with which the heat demand WF, the fault display via an LED 1 and the burner on display can be controlled via a LED2.
  • the periphery also has a supply V for the control device.
  • valve controls A1, A2 are operate two valves V1, V2 crosswise by means of the two control units C1, C2.
  • the valve controls A1, A2 each have two separate ones Switches in the form of semiconductor switches, which are preferably different, e.g. B. constructed as a bipolar transistor or field effect transistor and with different Logic are controlled.
  • the two control units C1, C2 are each assigned to a different switch. Pressing one of the two a switch associated with a valve is sufficient to block the gas supply path.
  • the gas supply can therefore also be provided by only one of the two control units C1, C2 be blocked if one of the two control units fails.
  • the information failure of the two control units C1, C2 receives the other Control unit from the query of the evaluation circuit M1 or M2 and / or the Data exchange between the two control units C1, C2.
  • the data exchange between the two control units C1, C2 takes place via a serial interface, with the data being at least all security-relevant Contain data for the control of the valves V1, V2, which are compared with one another become.
  • At least one control unit C1, C2 interrupts the Switch-off relay R the voltage supply of the valves V1, V2 and closes with it the valves V1, V2.
  • the control unit C1 causes the error data be stored in the memory SP.
  • Both control units C1, C2 know the states of the valves V1, V2, the Flame detection FE or flame monitoring and unlocking E or interference suppression. Only the control unit receives the signal for heat demand WF C1.
  • control unit C1 When the control device is operating, the control unit C1 begins, for example communication with the control unit C2 and with that via a serial Interface connected control processor ST. The respective communication partner answers after receiving the data of the control unit C1.
  • the communication with the control processor ST can be positive depending on the processor type or negative logic.
  • Only the control unit communicates with the memory SP C1, so that it has a higher priority than the control unit C2.
  • the memory SP can be integrated in the control unit C1.
  • the input signals are two control units C1, C2 fed, while the output signals to both control units C1, C2 are divided, with the safety-relevant functions of both control units C1, C2 are perceived.
  • the other functions are as Partitions divided between the two control units C1, C2.
  • control unit C1 receives a heat request WF from the periphery I receives, it forwards them via the data bus to the control unit C2.
  • Both control units C1, C2 perform a change of state on the basis of the input signals by. This is also an essential part of the mutual Monitoring the control units. Activate according to the state Control units their respective sub-functions, such as ignition, flame test, Leak test when switching off and displaying the respective status. The The coding of the different options must be done by both control units C1, C2 read in for mutual monitoring.

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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)

Description

Die Erfindung bezieht sich auf eine Steuereinrichtung für einen Brenner mit zwei Steuereinheiten, mit denen ein oder zwei in Reihe zueinander in einem Weg eines Brennmediums angeordnete Ventile zum Öffnen und Sperren des Wegs ansteuerbar sind und mit den Einschaltzustand und den Sperrzustand der Ventile angegebene Zustandsdaten erfaßbar und außerdem weitere Steuerungsfunktionen für den Betrieb des Brenner durchführbar sind.The invention relates to a control device for a burner with two Control units that allow one or two in series to each other in one way Fuel medium arranged valves for opening and blocking the way can be controlled and specified with the switch-on state and the blocking state of the valves Status data can be recorded and further control functions for the operation of the Burners are feasible.

Eine derartige Steuereinrichtung mit zwei Steuereinheiten für einen Gasbrenner ist aus EP 614 047 A1 bekannt. Den Steuereinheiten ist jeweils ein Schalter zugeordnet, die in Serie in einen Ansteuerkreis für ein Relais eines Ventils geschaltet sind. Die beiden Steuereinheiten sind dabei jeweils über Abschaltkreise mit jedem der beiden Schalter verbunden. Tritt ein Fehler in einem der beiden den Schaltern zugeordneten Abschaltkreisen auf, erfolgt mit mindestens einem Schalter eine Trennung des Ansteuerkreises und damit eine Sperrung des Ventils.Such a control device with two control units for a gas burner is out EP 614 047 A1 known. A switch is assigned to each of the control units Series are connected in a control circuit for a relay of a valve. The two Control units are each with shutdown circuits with each of the two switches connected. If an error occurs in one of the two assigned to the switches Switch-off circuits open, at least one switch separates the Control circuit and thus a blocking of the valve.

Bei einer Steuereinrichtung für einen Brenner gemäß US 5 513 979 sind ebenfalls in einen Ansteuerkreis für ein Relais zur Betätigung eines Ventils zwei Schalter in Reihe geschaltet. Die beiden Schalter werden dabei ebenfalls von jeder der beiden Steuereinheiten angesteuert.In a control device for a burner according to US 5,513,979 are also in a control circuit for a relay for actuating a valve two switches in series connected. The two switches are also used by each of the two Controlled units.

Bei einer weiteren Steuereinrichtung für einen Gasbrenner gemäß der DE 43 42 991 A1 sind zwei identisch aufgebaute Kanäle für die Steuerung mit zwei Steuereinheiten vorgesehen. Beide Kanäle besitzen je einen beschreibbaren und löschbaren nichtflüchtigen Speicher in Form eine EEPROM. Die beiden Steuereinheiten arbeiten in einer Master-Slave-Zuordnung, die nach jeder Wärmeforderung wechselt, so dass sich die aktuellen Verarbeitungszyklen unterscheiden. Da die Master-Slave-Zuordnung nach jedem Zyklus wechselt, sind beide Kanäle insgesamt jedoch gleichberechtigt und können alle Funktionen ausführen. Aus Sicherheitsgründen muß die Steuereinrichtung so ausgelegt sein, dass das Gesamtsystem nur in Betrieb gehen darf, wenn beide Kanäle fehlerfrei arbeiten. Der aufgrund dieser Forderung vorgesehene Aufbau dieser bekannten Steuereinrichtung ist andererseits verhältnismäßig aufwendig.In a further control device for a gas burner according to DE 43 42 991 A1 are two identical channels for control with two control units intended. Both channels each have a writable and erasable non-volatile memory in the form of an EEPROM. The two control units work in a master-slave assignment that changes after each heat request, so that the distinguish between current processing cycles. Since the master-slave assignment after changes every cycle, however, both channels as a whole are equal and can perform all functions. Out For safety reasons, the control device must be designed so that the overall system may only be started if both channels are working properly. The construction of this known control device provided on the basis of this requirement on the other hand is relatively expensive.

Der Erfindung liegt die Aufgabe zugrunde, eine Steuereinrichtung der eingangs genannten Art bereitzustellen, die die geforderte Sicherheit erfüllt und dabei verhältnismäßig einfach und kostengünstig aufgebaut ist.The invention has for its object a control device of the beginning to provide the type mentioned, which meets the required security and is proportionate is simple and inexpensive.

Diese Aufgabe wird mit den Merkmalen des Anspruchs 1 gelöst. Hiernach ist vorgesehen, dass die Funktionen nach sicherheitsrelevanten Funktionen, zu denen zumindest die Ansteuerung des Ventils/der Ventile zum Einnehmen des Sperrzustands und die Erfassung der den Sperrzustand angebenden Zustandsdaten zählen, und nach weiteren Funktionen unterschieden sind, zu denen die Erfassung einer Wärmeforderung und eine Zündung des Brenners zählen, und dass die sicherheitsrelevanten Funktionen den beiden Steuereinheiten zugeordnet sind, während von den weiteren Funktionen nur Teilmengen den beiden Steuereinheiten zugeordnet sind. Die Aufteilung in sicherheitsrelevante Funktionen und weitere Funktionen und die Zuordnung der sicherheitsrelevanten Funktionen zu beiden Steuereinheiten und der weiteren Funktionen in Teilmengen auf die beiden Steuereinheiten läßt einen vereinfachten Aufbau der gesamten Steuereinrichtung zu, indem die beiden Kanäle unterschiedlich aufgebaut sind, da sie hinsichtlich der weiteren Funktionen nur zur Ausführung von Teilaufgaben ausgelegt sein müssen.This object is achieved with the features of claim 1. After that is provided that the functions according to safety-related functions to which at least the control of the valve (s) for taking the Locked state and the acquisition of the state data indicating the locked state count, and are distinguished by other functions, to which the Detection of a heat demand and ignition of the burner count, and that the safety-relevant functions are assigned to the two control units are, while of the other functions only subsets of the two Control units are assigned. The division into safety-relevant functions and other functions and the assignment of safety-related functions to both control units and the other functions in subsets the two control units allows a simplified structure of the whole Control device by the two channels are constructed differently because with regard to the other functions, only for the execution of subtasks must be designed.

Die Steuerungsabläufe und damit auch der Aufbau der Steuereinrichtung können weiterhin dadurch vereinfacht werden, dass die Teilmengen der weiteren Funktionen mittels eines Codierers und/oder mittels Parameter eines übergeordneten Steuerprogramms variabel einstellbar oder erweiterbar oder verkleinerbar sind. Mit diesen Maßnahmen müssen beispielsweise die Speicher und Datenübertragungselemente nicht dazu ausgelegt sein, stets alle möglichen Funktionen ausführen zu können, sondern der Aufwand kann hinsichtlich der möglichen vorkommenden Funktionen minimiert werden, wobei die Vielseitigkeit der Einstellmöglichkeiten erhalten bleibt.The control processes and thus the structure of the control device can further simplified by the fact that the subsets of the other functions by means of an encoder and / or by means of parameters of a higher-level Control program can be variably adjusted or expanded or reduced. With These measures, for example, the memory and data transfer elements not be designed to always perform all possible functions to be able to, but the effort can be in terms of the possible occurring Functions are minimized, with the versatility of the setting options preserved.

Die Vielfalt der Einstellmöglichkeiten wird weiterhin dadurch begünstigt, dass die sicherheitsrelevanten Funktionen und die weiteren Funktionen auf der Grundlage unterschiedlicher Optionen einstellbar sind, die mindestens zwei der folgenden Einstellmöglichkeiten beinhalten: ein oder zwei Ventile sind vorhanden, die Ventile sind jeweils nur von einer Steuereinheit parallel oder jeweils von beiden Steuereinheiten ansteuerbar; ein zusätzliches Abschaltrelais ist vorhanden oder nicht; ein zusätzlicher Steuerprozessor ist vorhanden oder nicht; der Datenaustausch mit dem zusätzlichen Steuerprozessor erfolgt über eine positive oder negative Logik.The variety of setting options is further favored by the fact that security-related functions and the other functions on the basis different options are adjustable, at least two of the following Setting options include: one or two valves are available, the valves are only parallel from one control unit or from both Control units controllable; an additional switch-off relay is available or not; an additional control processor is present or not; the Data exchange with the additional control processor takes place via a positive or negative logic.

Vorteilhaft ist vorgesehen, dass zu den weiteren Funktionen ein Flammentest, ein Dichtheitstest beim Abschalten und/oder eine Zustandsanzeige gehören.It is advantageously provided that a flame test, a Tightness test when switching off and / or a status display belong.

Die sichere Arbeitsweise der Steuereinrichtung wird dadurch unterstützt, dass zwischen den beiden Steuereinheiten ein Datenaustausch stattfindet und dass sich die beiden Steuereinheiten gegenseitig hinsichtlich ihrer Zustände und Funktionsfähigkeit überwachen.The safe functioning of the control device is supported in that data exchange takes place between the two control units and that the two control units mutually with respect to their states and Monitor functionality.

Der einfache Aufbau der Steuereinrichtung wird weiterhin dadurch begünstigt, dass einer Steuereinheit eine höhere Priorität zugeordnet ist als der anderen Steuereinheit, dass nur der Steuereinheit mit der höheren Priorität eine Wärmeforderung zugeführt wird und ein beschreibbarer und löschbarer nichtflüchtiger Speicher zugeordnet ist, mit dem diese Steuereinheit kommuniziert, und dass diese eine Steuereinheit die Wärmeforderung und aus dem nichtflüchtigen Speicher ausgelesene Daten an die andere Steuereinheit leitet.The simple structure of the control device is further favored by that one control unit is assigned a higher priority than the other Control unit that only the control unit with the higher priority a heat request is supplied and a writable and erasable non-volatile Memory is allocated with which this control unit communicates, and that this a control unit the heat demand and from the non-volatile memory reads out data to the other control unit.

Mit den besonderen Maßnahmen, dass das eine Ventil oder die beiden in dem Weg des Brennmediums in Reihe liegenden Ventile jeweils über zwei in Reihe in einer Ventilansteuerung liegende Halbleiterschalter ansteuerbar sind, wobei das Ventil/die Ventile bereits durch Ansteuerung nur eines der beiden jeweils zugeordneten Halbleiterschalter in den Sperrzustand bringbar ist/sind, und dass die beiden Steuereinheiten zum Ansteuern des Ventils/der Ventile jeweils mit einem der beiden einem Ventil zugeordneten Halbleiterschalter verbunden sind, wird bei einfachem Aufbau eine hohe Sicherheit bei der Steuerung insbesondere einer Gaszuführung erzielt.With the special measures that the one valve or the two in the The way of the combustion medium in-line valves each over two in-line in semiconductor switches located in a valve control can be controlled, the Valve (s) already by controlling only one of the two assigned semiconductor switch can be brought into the blocking state, and that the two control units for controlling the valve (s) with each one of the two semiconductor switches assigned to a valve are connected, with a simple structure high security in the control of a gas supply in particular.

Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiels unter Bezugnahme auf die Zeichnung näher erläutert.The invention is described below using an exemplary embodiment Reference to the drawing explained in more detail.

Die Figur zeigt in schematischer Darstellung eine Steuereinrichtung für einen Gasbrenner, wobei in einem Gaszuführweg hintereinander als Sicherheitsventile ein erstes Ventil V1 und ein weiteres Ventil V2 angeordnet sind, über die das Gas zum Brenner geführt wird. Parallel zu dem weiteren Ventil V2, das z. B. einer Raumheizung zugeordnet ist, kann weiterhin noch ein Brauchwasserventil V3 vorgesehen sein, über das ebenfalls Gas zu dem Brenner gelangt, und zwar wenn ein Wasserhahn betätigt wird. Das erste Ventil V1 und das zweite Ventil V2 werden mittels einer ersten Steuereinheit C1 und einer weiteren Steuerei nheit C2 angesteuert, wobei beide Steuereinheiten C1, C2 auf eine dem ersten Ventil V1 zugeordnete erste Ventilansteuerung A1 und eine dem weiteren Ventil V2 zugeordnete weitere Ventilansteuerung A2 mit Steuerdaten zum Öffnen oder Sperren der beiden Ventile V1, V2 einwirken. Hierzu ist die erste Steuereinheit C1 über eine Steuerleitung SL1 mit der ersten Ventilansteuerung A1 und über eine weitere Steuerleitung SL2 mit der weiteren Ventilansteuerung A2 verbunden, während die zweite Steuereinheit C2 über eine Steuerleitung SL1' mit der ersten Ventilansteuerung A1 und einer weiteren Steuerleitung SL2' mit der weiteren Ventilansteuerung A2 in Verbindung steht. Außerdem sind die beiden Steuereinheiten C1, C2 über jeweilige Rückleitungen RL1, RL2, RL1' und RL2' über eine dem ersten Ventil V1 zugeordnete erste Auswerteschaltung M1 und eine dem weiteren Ventil V2 zugeordnete weitere Auswerteschaltung M2 verbunden, um den Einschaltzustand und den Sperrzustand der beiden Ventile V1 und V2 zu erfassen. Ferner tauschen die beiden Steuereinheiten C1 und C2 über einen Datenbus Daten bezüglich ihrer jeweiligen Zustände und weitere für beide Steuereinheiten wichtige Daten aus.The figure shows a control device for a schematic representation Gas burner, one behind the other as safety valves in a gas supply path a first valve V1 and a further valve V2 are arranged, via which the gas is led to the burner. Parallel to the further valve V2, which, for. B. one Space heating is assigned, a service water valve V3 can still be used be provided, via which gas also reaches the burner, namely when a faucet is operated. The first valve V1 and the second valve V2 are by means of a first control unit C1 and a further control unit C2 controlled, wherein both control units C1, C2 on one of the first valve V1 assigned first valve control A1 and one assigned to the further valve V2 additional valve control A2 with control data for opening or locking of the two valves V1, V2 act. For this purpose, the first control unit C1 is over a control line SL1 with the first valve control A1 and another Control line SL2 connected to the further valve control A2 while the second control unit C2 via a control line SL1 'with the first Valve control A1 and another control line SL2 'with the other Valve control A2 is connected. In addition, the two control units C1, C2 via respective return lines RL1, RL2, RL1 'and RL2' via one first evaluation circuit M1 assigned to first valve V1 and one to further evaluation circuit assigned to further valve V2 connected to the switch-on state and the blocking state of the two valves V1 and V2 to capture. Furthermore, the two control units C1 and C2 exchange one Data bus data regarding their respective states and others for both Control units important data.

Die erste Steuereinheit C1 steht mit einem beschreibbaren und löschbaren nichtflüchtigen Speicher SP in Form eines EEPROM in einem gegenseitigen Datenaustausch. Ein Entriegelungssignal einer Entriegelung E wird beiden Steuereinheiten C1, C2 zugeführt. Außerdem empfangen beide Steuereinheiten C1, C2 Signale von einer lonisations- oder Flammerkennung für einen Flammtest. Mittels einer Kodierung K können unterschiedliche Optionen, wie z. B. das Vorhandensein eines oder zweier Sicherheitsventile, eine gekreuzte oder parallele Ansteuerung der beiden Ventilansteuerungen A1, A2, das Vorhandensein eines zusätzlichen Abschaltrelais R, die Steuerung mit einem oder ohne einen zusätzlichen Steuerprozessor ST, der Datenaustausch über eine positive oder negative Logik mit dem Steuerprozessor ST, eingestellt sowie weitere Optionen, etwa eine Sicherheitszeit und eine Abschaltzeit für einen Dichtheitstest werden. Der weiteren Steuereinheit C2 ist ferner die Zündung Z des Brenners zugeordnet. Ein an beide Steuereinheiten C1, C2 angeschlossenes Relais REL dient einer Fehlerüberwachung und zusätzlichen Abschaltmöglichkeit. Ferner ist noch ein (ansteuerbarer) TemperaturBegrenzer B für die Ansteuerung der Ventile V1, V2 bzw. die diesen zugeordneten Auswertschaltungen M1, M2 vorgesehen.The first control unit C1 has a writable and erasable non-volatile Memory SP in the form of an EEPROM in a mutual data exchange. An unlocking signal of an unlocking E becomes two control units C1, C2 fed. In addition, both control units C1, C2 receive signals from ionization or flame detection for a flame test. By means of a Coding K can have different options, such as. B. the presence one or two safety valves, a crossed or parallel control of the two valve controls A1, A2, the presence of an additional Switch-off relay R, the control with or without an additional control processor ST, the data exchange via a positive or negative logic with the Control processor ST, set and other options, such as a safety time and a shutdown time for a leak test. The other control unit C2 is also assigned the ignition Z of the burner. One to both control units Relay C1, C2 connected serves for error monitoring and additional switch-off option. There is also a (controllable) temperature limiter B for the control of valves V1, V2 or the latter assigned evaluation circuits M1, M2 are provided.

Der vorstehend beschriebene Abschnitt der Steuereinrichung gehört zu einem Feuerungsautomaten II. Dieser Schaltungsabschnitt steht mit einer Peripherie I über eine entsprechende Schnittstelle in Verbindung. Die Peripherie I weist den bereits erwähnten Steuerprozessor ST auf, der mit der ersten Steuereinheit C1 im Datenaustausch steht. Optional zu dem Steuerprozessor ST, über den auch eine Wärmeforderung zugeführt und z. B. eine Störanzeige oder Brenner-Ein-Anzeige bewirkt werden können, weist die Peripherie I einen Steuerabschnitt SA auf, mit dem die Wärmeforderung WF, die Störanzeige über eine Leuchtdiode LED 1 und die Brenner-Ein-Anzeige über eine Leuchtdiode LED2 gesteuert werden können. Die Peripherie weist außerdem eine Versorgung V für die Steuereinrichtung auf.The section of the control device described above belongs to one Automatic burner control II. This circuit section stands with a peripheral I via a corresponding interface. The periphery I has the already mentioned control processor ST, which with the first control unit C1 in Data exchange stands. Optional to the control processor ST, via which one Heat demand supplied and z. B. a fault display or burner on display can be effected, the periphery I has a control section SA, with which the heat demand WF, the fault display via an LED 1 and the burner on display can be controlled via a LED2. The periphery also has a supply V for the control device.

Zur Erhöhung der Betriebssicherheit werden die Ventilansteuerungen A1, A2 der beiden Ventile V1, V2 mittels der beiden Steuereinheiten C1, C2 überkreuz betrieben. Hierzu weisen die Ventilansteuerungen A1, A2 jeweils zwei getrennte Schalter in Form von Halbleiterschaltern auf, die vorzugsweise unterschiedlich, z. B. als Bipolar-Transistor oder Feldeffekt-Transistor aufgebaut und mit unterschiedlicher Logik angesteuert sind. Die beiden Steuereinheiten C1, C2 sind jeweils einem verschiedenen Schalter zugeordnet. Das Betätigen eines der beiden einem Ventil zugeordneten Schalter reicht aus, um den Gaszuführweg zu sperren. Somit kann die Gaszufuhr auch von nur einer der beiden Steuereinheiten C1, C2 gesperrt werden, wenn eine der beiden Steuereinheiten ausfällt. Die Information eines Ausfalls der beiden Steuereinheiten C1, C2 erhält die jeweils andere Steuereinheit aus der Abfrage der Auswerteschaltung M1 bzw. M2 und/oder dem Datenaustausch zwischen den beiden Steuereinheiten C1, C2.To increase operational safety, the valve controls A1, A2 are operate two valves V1, V2 crosswise by means of the two control units C1, C2. For this purpose, the valve controls A1, A2 each have two separate ones Switches in the form of semiconductor switches, which are preferably different, e.g. B. constructed as a bipolar transistor or field effect transistor and with different Logic are controlled. The two control units C1, C2 are each assigned to a different switch. Pressing one of the two a switch associated with a valve is sufficient to block the gas supply path. The gas supply can therefore also be provided by only one of the two control units C1, C2 be blocked if one of the two control units fails. The information failure of the two control units C1, C2 receives the other Control unit from the query of the evaluation circuit M1 or M2 and / or the Data exchange between the two control units C1, C2.

Der Datenaustausch zwischen den beiden Steuereinheiten C1, C2 erfolgt über eine serielle Schnittstelle, wobei die Daten zumindest alle sicherheitsrelevanten Daten für die Ansteuerung der Ventile V1, V2 enthalten, die miteinander verglichen werden.The data exchange between the two control units C1, C2 takes place via a serial interface, with the data being at least all security-relevant Contain data for the control of the valves V1, V2, which are compared with one another become.

In einem Fehlerfall unterbricht mindestens eine Steuereinheit C1, C2 über das Abschaltrelais R die Spannungsversorgung der Ventile V1, V2 und schließt damit die Ventile V1, V2. Zusätzlich bewirkt die Steuereinheit C1, dass die Fehlerdaten in dem Speicher SP abgelegt werden.In the event of an error, at least one control unit C1, C2 interrupts the Switch-off relay R the voltage supply of the valves V1, V2 and closes with it the valves V1, V2. In addition, the control unit C1 causes the error data be stored in the memory SP.

Beide Steuereinheiten C1, C2 kennen die Zustände der Ventile V1, V2, der Flammenerkennung FE bzw. der Flammenüberwachung sowie der Entriegelung E bzw. Entstörung. Das Signal der Wärmeforderung WF erhält nur die Steuereinheit C1.Both control units C1, C2 know the states of the valves V1, V2, the Flame detection FE or flame monitoring and unlocking E or interference suppression. Only the control unit receives the signal for heat demand WF C1.

Beim Betrieb der Steuereinrichtung beginnt beispielsweise die Steuereinheit C1 die Kommunikation mit der Steuereinheit C2 und mit dem über eine serielle Schnittstelle angeschlossenen Steuerprozessor ST. Der jeweilige Kommunikationspartner antwortet nach dem Empfang der Daten der Steuereinheit C1. Die Kommunikation mit dem Steuerprozessor ST kann je nach Prozessortyp mit positiver oder negativer Logik erfolgen. Mit dem Speicher SP kommuniziert nur die Steuereinheit C1, so dass dieser eine höhere Priorität als der Steuereinheit C2 zukommt. Der Speicher SP kann in die Steuereinheit C1 integriert sein.When the control device is operating, the control unit C1 begins, for example communication with the control unit C2 and with that via a serial Interface connected control processor ST. The respective communication partner answers after receiving the data of the control unit C1. The communication with the control processor ST can be positive depending on the processor type or negative logic. Only the control unit communicates with the memory SP C1, so that it has a higher priority than the control unit C2. The memory SP can be integrated in the control unit C1.

Bei dem beschriebenen Aufbau sind die Eingangssignale beiden Steuereinheiten C1, C2 zugeführt, während die Ausgangssignale auf beide Steuereinheiten C1, C2 aufgeteilt sind, wobei die sicherheitsrelevanten Funktionen von beiden Steuereinheiten C1, C2 wahrgenommen werden. Die weiteren Funktionen sind als Teilmengen auf die beiden Steuereinheiten C1, C2 aufgeteilt.In the structure described, the input signals are two control units C1, C2 fed, while the output signals to both control units C1, C2 are divided, with the safety-relevant functions of both control units C1, C2 are perceived. The other functions are as Partitions divided between the two control units C1, C2.

Wenn die Steuereinheit C1 eine Wärmeanforderung WF von der Peripherie I empfängt, leitet sie diese über den Datenbus an die Steuereinheit C2 weiter. Einen Zustandswechsel führen beide Steuereinheiten C1, C2 anhand der Eingangssignale durch. Darin besteht auch ein wesentlicher Teil der gegenseitigen Überwachung der Steuereinheiten. Entsprechend dem Zustand aktivieren die Steuereinheiten ihre jeweiligen Teilfunktionen, wie Zündung, Flammentest, Dichtheitstest beim Abschalten und Anzeige des jeweiligen Zustandes. Die Kodierung der verschiedenen Optionen müssen beide Steuereinheiten C1, C2 wegen der gegenseitigen Überwachung einlesen.If the control unit C1 receives a heat request WF from the periphery I receives, it forwards them via the data bus to the control unit C2. Both control units C1, C2 perform a change of state on the basis of the input signals by. This is also an essential part of the mutual Monitoring the control units. Activate according to the state Control units their respective sub-functions, such as ignition, flame test, Leak test when switching off and displaying the respective status. The The coding of the different options must be done by both control units C1, C2 read in for mutual monitoring.

Mit dem beschriebenen Aufbau und der Aufteilung der Funktionen ergibt sich eine relativ einfache Schaltungsanordnung bei hoher Betriebssicherheit.With the described structure and the division of functions, one results relatively simple circuit arrangement with high operational reliability.

Claims (7)

  1. Control device for a burner, with two control units (C1, C2), by means of which one or two valves (V1, V2) arranged in series with one another in a path of a fuel can be activated, in order to open and shut off the path, via associated valve activations (A1, A2), each with two switches, and by means of which state data indicating the switched-on state and the shut-off state of the valves (V1, V2) can be detected and, moreover, further control functions for operating the burner can be carried out, the functions being distinguished from one another in terms of safety-relevant functions, which include at least the activation of the valve/valves for assuming the shut-off state and the detection of the state data indicating the shut-off state, and in terms of further functions, which include the detection of a heat demand and an ignition of the burner, and the safety-relevant functions being assigned to both control units (C1, C2), whilst only subsets of the further functions are assigned to both control units (C1, C2), characterized in that the two switches of the valve activation or valve activations (A1, A2) are constructed as different semiconductor switches, and the two control units (C1, C2) are assigned in each case to a different switch.
  2. Control device according to Claim 1, characterized in that the subsets of the further functions and of the safety-relevant functions can be set variably or extended or reduced by means of an encoder (K) and/or by means of parameters of an overriding control program.
  3. Control device according to Claim 1, characterized in that the safety-relevant functions and the further functions can be set on the basis of different options which contain at least two of the following setting possibilities: one or two valves (V1, V2) are present; an additional cut-off relay (R) is present or not; an additional control processor (ST) is present or not; data exchange with the additional control processor (ST) takes place via positive or negative logic.
  4. Control device according to one of the preceding claims, characterized in that the further functions include a flame test, a leak-tightness test during cut-off and/or a state indicator.
  5. Control device according to one of the preceding claims, characterized in that data exchange takes place between the two control units (C1, C2), and in that the two control units (C1, C2) monitor one another with regard to their states and functioning capacity.
  6. Control device according to one of the preceding claims, characterized in that one control unit (C1) is assigned a higher priority than the other control unit (C2), in that only the control unit (C1) having the higher priority is supplied with a heat demand and is assigned a programmable and erasable non-volatile memory (EEPROM), with which this control unit (C1) communicates, and in that this one control unit (C1) conducts the heat demand and data read out from the non-volatile memory (EEPROM) to the other control unit (C2).
  7. Control device according to one of the preceding claims, characterized in that the valve/valves (V1, V2) can be brought into the shut-off state even by the activation of only one of the two semiconductor switches assigned in each case, and in that the two control units (C1, C2) for activating the valve/valves (V1, V2) are connected in each case to one of the two semiconductor switches assigned to a valve.
EP99967911A 1998-12-28 1999-12-27 Control device for a burner Revoked EP1141633B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19860399 1998-12-28
DE19860399A DE19860399A1 (en) 1998-12-28 1998-12-28 Control device for a burner
PCT/DE1999/004097 WO2000039505A1 (en) 1998-12-28 1999-12-27 Control device for a burner

Publications (2)

Publication Number Publication Date
EP1141633A1 EP1141633A1 (en) 2001-10-10
EP1141633B1 true EP1141633B1 (en) 2003-12-17

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Application Number Title Priority Date Filing Date
EP99967911A Revoked EP1141633B1 (en) 1998-12-28 1999-12-27 Control device for a burner

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EP (1) EP1141633B1 (en)
BR (1) BR9916625A (en)
DE (2) DE19860399A1 (en)
PL (1) PL349075A1 (en)
WO (1) WO2000039505A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2295863B1 (en) 2009-08-06 2019-05-01 Robert Bosch GmbH Combustion system, automatic gas ignition device and device and method for interrupting a fuel supply for same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2304331B1 (en) * 2008-05-09 2018-01-03 Kidde-Fenwal, Inc. Ignition control with safeguard function
EP3848633B1 (en) 2020-01-10 2022-03-16 Siemens Aktiengesellschaft Circuit with protection against internal faults

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
DE3923773A1 (en) * 1988-07-20 1990-03-01 Vaillant Joh Gmbh & Co Microcomputer control for gas-fired central heating boiler
EP0497147A3 (en) * 1991-01-28 1993-05-05 Siemens Aktiengesellschaft Redundant automation system
DE9310458U1 (en) * 1993-03-05 1994-06-30 Landis & Gyr Business Support Ag, Zug Electronic control device for gas burners of heating systems
DE9310451U1 (en) * 1993-03-05 1994-06-30 Landis & Gyr Business Support Ag, Zug Control device for automatic gas firing systems for heating systems
DE4342991A1 (en) * 1993-12-16 1995-06-22 Bosch Gmbh Robert Method for monitoring at least one safety-relevant function of a device
DE19507071A1 (en) * 1995-03-01 1996-09-05 Bosch Gmbh Robert Circuit for switching an electrical load on and off

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2295863B1 (en) 2009-08-06 2019-05-01 Robert Bosch GmbH Combustion system, automatic gas ignition device and device and method for interrupting a fuel supply for same

Also Published As

Publication number Publication date
BR9916625A (en) 2001-08-21
PL349075A1 (en) 2002-07-01
DE59908144D1 (en) 2004-01-29
WO2000039505A1 (en) 2000-07-06
DE19860399A1 (en) 2000-07-06
EP1141633A1 (en) 2001-10-10

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