EP1179159A1 - Regulating device for gas burners - Google Patents

Regulating device for gas burners

Info

Publication number
EP1179159A1
EP1179159A1 EP00934993A EP00934993A EP1179159A1 EP 1179159 A1 EP1179159 A1 EP 1179159A1 EP 00934993 A EP00934993 A EP 00934993A EP 00934993 A EP00934993 A EP 00934993A EP 1179159 A1 EP1179159 A1 EP 1179159A1
Authority
EP
European Patent Office
Prior art keywords
gas
combustion air
sensor
flow
signal
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
EP00934993A
Other languages
German (de)
French (fr)
Other versions
EP1179159B1 (en
Inventor
Enno Vrolijk
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.)
Garrett Motion SARL
Original Assignee
Honeywell BV
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
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Application filed by Honeywell BV filed Critical Honeywell BV
Publication of EP1179159A1 publication Critical patent/EP1179159A1/en
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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
    • 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
    • F23N5/188—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel using mechanical 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
    • F23N1/022—Regulating fuel supply conjointly with air supply using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel
    • F23N5/184—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
    • F23N5/18—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
    • F23N2225/00—Measuring
    • F23N2225/04—Measuring pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2233/00—Ventilators
    • F23N2233/06—Ventilators at the air intake
    • F23N2233/08—Ventilators at the air intake with variable speed
    • 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
    • F23N2900/00—Special features of, or arrangements for controlling combustion
    • F23N2900/05181—Controlling air to fuel ratio by using a single differential pressure detector

Definitions

  • the invention relates to a control device for gas burners according to the preamble of claim 1.
  • Control devices for gas burners serve to provide a gas / air mixture, that is to say to supply a gas stream and a ner combustion air stream to a burner.
  • the gas flow through a gas valve is adjustable depending on the ner combustion air pressure.
  • Control devices for gas burners are from the prior art, for. B. EP 0 390 964 AI, well known.
  • pressure is determined with the aid of a membrane, that is to say pneumatically.
  • the gas flow through the gas valve is regulated.
  • this pneumatic route has a number of disadvantages, all of which limit the scope of known control devices.
  • the hysteresis properties of the membrane and the forces acting between the membrane and the gas valve limit the working area and thus the area of application.
  • the interaction between the required small actuating forces and the operating tolerances of the membrane as a result of disturbing influences, such as temperature fluctuations or the like limits the range of use of known control devices.
  • the present invention is based on the problem of creating a novel control device for gas burners.
  • Fig. 1 shows a control device according to the invention with further assemblies according to a first embodiment of the invention in a schematic representation
  • Fig. 2 shows a control device according to the invention with further assemblies according to a second embodiment of the invention also in a schematic representation.
  • the present invention relates to control devices for gas burners.
  • a gas / air mixture is to be fed to a burner (not shown).
  • a gas line 10 is provided which leads the gas flow to the burner.
  • a gas valve 11 is assigned to the gas line 10.
  • the ner combustion air is fed to the burner (not shown) via a combustion air line 12.
  • the ner combustion air line 12 consequently leads the combustion air flow to the burner.
  • a blower 13 is assigned to the combustion air line 12.
  • an orifice or throttle point 14 is arranged, namely in the flow direction of the combustion air in front of the fan 13.
  • the gas line 10 leading the gas flow opens in the flow direction of the combustion air behind the throttle point 14 and before the fan
  • a gas nozzle 15 closes off the gas line 10 in the area of the combustion air line 12.
  • Flow direction behind the gas nozzle 15 and in front of the fan 13 is therefore a gas / air mixture.
  • an electrical or electronic sensor 16 is provided for this.
  • the sensor 16 is designed as a differential pressure sensor, in particular as a flow meter, anemometer or the like. With a measuring point 17, the sensor 16 is connected to the gas line 10 carrying the gas flow. The measuring point 17 is positioned in front of the gas nozzle 15 in the direction of flow of the gas.
  • a reference pressure prevails at a reference point 18 of the electrical or electronic sensor 16, namely the combustion air pressure.
  • no connection between the sensor 16 and the combustion air line 12 is required, in particular if the sensor 16 and the inlet of the combustion air are arranged within the same housing.
  • the gas pressure must correspond to the reference pressure / combustion air pressure.
  • the sensor 16 is designed as a flow meter or anemometer, this means that the flow through the sensor 16 is zero.
  • the sensor 16 experiences a flow in the direction of the gas line 10. The pressure ratios between the combustion air pressure and the gas pressure can therefore be determined by the sensor 16 based on the flow rate.
  • the sensor 16 Depending on the above pressure conditions, the sensor 16 generates an electrical or electronic signal 19 which is used to adjust the gas valve 11. According to FIG. 1, the electrical or electronic signal 19 is fed to a control or regulating device 20, which generates a control signal 21 for an actuator 22 assigned to the gas valve 11 from the signal 19.
  • a 1: 1 gas / air composite control can be provided with the control device shown in FIG. If the sensor 16 detects a pressure difference of zero between the reference pressure and the gas pressure, the signal 19 corresponds to a pressure difference of zero and the gas valve 11 can be operated unchanged. If the sensor 16 detects a reference pressure which is higher than the gas pressure, the gas or valve 11 must be activated with the aid of the electrical or electronic signal 19 generated by the sensor 16 in such a way that the gas flow increases. For this purpose, the control device 20 generates a control signal 21 for the actuator 22 of the gas valve 11, such that the signal 19 is again routed to an amount that corresponds to a pressure difference of zero.
  • the control device of the exemplary embodiment according to FIG. 2 a different transmission ratio between gas flow and air flow can be realized compared to the exemplary embodiment according to FIG. 1, that is to say a 1: N gas / air compound control.
  • the electrical or electronic signal 19 of the sensor 16 is offset in a summing device 23 with an auxiliary signal 24, specifically before the signal 19 is supplied to the control device 20.
  • the control device 20 is accordingly supplied with the output signal 25 of the summing device 23 as an input signal, the output signal 25 being an additive superimposition of the signals 19, 24.
  • the auxiliary signal 24 is a signal which is functionally dependent on a speed of the fan 13.
  • the auxiliary signal 24 is obtained in an evaluation device 26 from a speed signal 27 of the fan 13 or the motor of the fan 13. Since the auxiliary signal 24 is functionally dependent on the speed of the fan 13, it follows immediately that the auxiliary signal 24 is also dependent on the combustion air flow or combustion air pressure.
  • auxiliary signal 24 in a different way. So it is not absolutely necessary that the auxiliary signal 24 is determined based on the speed of the fan. It is also conceivable to provide an additional sensor, not shown, for generating the auxiliary signal 24.
  • gas-adaptive control can be provided by using the output signal of a smoke gas sensor as an auxiliary signal.
  • a factor can be determined in the evaluation device 26, which determines the transmission ratio between gas flow and combustion air flow. This factor is a multiplication factor. The higher this multiplication factor, the higher the gear ratio. The transmission ratio can be varied by varying the multiplication factor.

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)
  • Gas Burners (AREA)

Abstract

The invention relates to a control means for gas burners. Control means for gas burners are used for supplying a gas flow and a combustion air flow to a burner. In this procedure, the gas flow is adjustable in dependence on the combustion air pressure. In the case of known control means, pressure measurement is effected by means of a diaphragm, i.e. pneumatically. This pneumatic pressure measurement restricts the scope of application of known control means.In the case of the control means according to the invention, there is provided a sensor (16) which generates an electric or electronic signal 19 which is used for adjusting the gas valve 11 (FIG. 1).

Description

Regeleinrichtung für Gasbrenner Control device for gas burners
Die Erfindung betrifft eine Regeleinrichtung für Gasbrenner gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a control device for gas burners according to the preamble of claim 1.
Regeleinrichtungen für Gasbrenner dienen der Bereitstellung eines Gas/Luft-Gemisches, also dem Zufuhren eines Gasstroms und eines Nerbrennungsluftstroms zu einem Brenner. Der Gasstrom durch ein Gasventil ist dabei in Abhängigkeit vom Nerbrennungsluftdruck einstellbar.Control devices for gas burners serve to provide a gas / air mixture, that is to say to supply a gas stream and a ner combustion air stream to a burner. The gas flow through a gas valve is adjustable depending on the ner combustion air pressure.
Regeleinrichtungen für Gasbrenner sind aus dem Stand der Technik, z. B. der EP 0 390 964 AI, hinlänglich bekannt. Bei der dort beschriebenen Regeleinrichtung erfolgt eine Druckbestimmung mit Hilfe einer Membran, also auf pneumatischem Weg. Abhängig von dieser Druckmessung wird der Gasstrom durch das Gasventil geregelt. Dieser pneumatische Weg verfügt jedoch über eine Vielzahl von Nachteilen, die allesamt den Anwendungsbereich bekannter Regeleinrichtungen einschränken. So schränken die Hysterese-Eigenschaften der Membran und die zwischen der Membran und dem Gasventil wirkenden Kräfte den Arbeitsbereich und damit den Anwendungsbereich ein. Des weiteren bewirkt das Zusammenspiel zwischen den erforderlichen kleinen Stellkräften und den Betriebstoleranzen der Membran infolge von Störeinflüssen wie Temperatuschwankungen oder dergleichen eine Einschränkung des Anwendungsbereichs bekannter Regeleinrichtungen.Control devices for gas burners are from the prior art, for. B. EP 0 390 964 AI, well known. In the control device described there, pressure is determined with the aid of a membrane, that is to say pneumatically. Depending on this pressure measurement, the gas flow through the gas valve is regulated. However, this pneumatic route has a number of disadvantages, all of which limit the scope of known control devices. The hysteresis properties of the membrane and the forces acting between the membrane and the gas valve limit the working area and thus the area of application. Furthermore, the interaction between the required small actuating forces and the operating tolerances of the membrane as a result of disturbing influences, such as temperature fluctuations or the like, limits the range of use of known control devices.
Hiervon ausgehend liegt der vorliegenden Erfindung das Problem zu Grunde, eine neuartige Regeleinrichtung für Gasbrenner zu schaffen.Proceeding from this, the present invention is based on the problem of creating a novel control device for gas burners.
Dieses Problem wird durch eine Regeleinrichtung für Gasbrenner mit den Merkmalen des Anspruchs 1 gelöst. Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen und der Beschreibung. Nachfolgend werden bevorzugte Ausführungsbeispiele der Erfindung anhand der Zeichnung näher erläutert. In der Zeichnung zeigt:This problem is solved by a control device for gas burners with the features of claim 1. Further advantageous embodiments of the invention result from the subclaims and the description. Preferred exemplary embodiments of the invention are explained in more detail below with reference to the drawing. The drawing shows:
Fig. 1 eine erfindungsgemäße Regeleinrichtung mit weiteren Baugruppen nach einem ersten Ausführungsbeispiel der Erfindung in schematisierter Darstellung, undFig. 1 shows a control device according to the invention with further assemblies according to a first embodiment of the invention in a schematic representation, and
Fig. 2 eine erfindungsgemäße Regeleinrichtung mit weiteren Baugruppen nach einem zweiten Ausführungsbeispiel der Erfindung ebenfalls in schematisierter Darstellung.Fig. 2 shows a control device according to the invention with further assemblies according to a second embodiment of the invention also in a schematic representation.
Die vorliegende Erfindung betrifft Regeleinrichtungen für Gasbrenner. Einem nicht- dargestellten Brenner soll ein Gas/Luft-Gemisch zugeführt werden.The present invention relates to control devices for gas burners. A gas / air mixture is to be fed to a burner (not shown).
Um dem nicht-dargestellten Brenner einen Gasstrom zuzuführen, ist eine Gasleitung 10 vorgesehen, die den Gasstrom zum Brenner führt. Der Gasleitung 10 ist ein Gasventil 11 zugeordnet.In order to supply a gas flow to the burner (not shown), a gas line 10 is provided which leads the gas flow to the burner. A gas valve 11 is assigned to the gas line 10.
Die Zuführung der Nerbrennungsluft zum nicht-dargestellten Brenner erfolgt über eine Verbrennungsluftleitung 12. Die Nerbrennungsluftleitung 12 führt demzufolge den Verbrennungsluftstrom zum Brenner. Der Verbrennungsluftleitung 12 ist ein Gebläse 13 zugeordnet. Innerhalb der den Verbrennungsluftstrom führenden VerbrennungsluftleitungThe ner combustion air is fed to the burner (not shown) via a combustion air line 12. The ner combustion air line 12 consequently leads the combustion air flow to the burner. A blower 13 is assigned to the combustion air line 12. Within the combustion air line leading the combustion air flow
12 ist eine Blende oder Drosselstelle 14 angeordnet, und zwar in Strömungsrichtung der Verbrennungsluft vor dem Gebläse 13.12, an orifice or throttle point 14 is arranged, namely in the flow direction of the combustion air in front of the fan 13.
Gemäß Figuren 1, 2 mündet die den Gasstrom führende Gasleitung 10 in Strömungsrichtung der Verbrennungsluft hinter der Drosselstelle 14 und vor dem GebläseAccording to Figures 1, 2, the gas line 10 leading the gas flow opens in the flow direction of the combustion air behind the throttle point 14 and before the fan
13 in die den Verbrennungsluftstrom führende Verbrennungsluftleitung 12. Eine Gasdüse 15 schließt die Gasleitung 10 im Bereich der Verbrennungsluftleitung 12 ab. In13 into the combustion air line 12 leading the combustion air flow. A gas nozzle 15 closes off the gas line 10 in the area of the combustion air line 12. In
Strömungsrichtung hinter der Gasdüse 15 und vor dem Gebläse 13 liegt demzufolge ein Gas/Luft-Gemisch vor.Flow direction behind the gas nozzle 15 and in front of the fan 13 is therefore a gas / air mixture.
Bei dem in Figur 1 dargestellten Ausführungsbeispiel geht es nun darum, eine 1:1 -Gas/Luft-Verbundregelung bereitzustellen. Erfindungsgemäß ist hierzu ein elektrischer bzw. elektronischer Sensor 16 vorgesehen. Der Sensor 16 ist als Differenzdruck- Sensor, insbesondere als Durchflußmesser, Anemometer oder dergleichen, ausgebildet. Mit einem Meßpunkt 17 ist der Sensor 16 an der den Gasstrom führenden Gasleitung 10 angeschlossen. In Strömungsrichtung des Gases ist der Meßpunkt 17 vor der Gasdüse 15 positioniert. An einem Referenzpunkt 18 des elektrischen bzw. elektronischen Sensors 16 herrscht ein Referenzdruck, nämlich der Verbrennungsluftdruck. Hierzu ist keine Verbindung zwischen dem Sensor 16 und der Verbrennungsluftleitung 12 erforderlich, insbesondere dann, wenn der Sensor 16 und der Einlaß der Verbrennungsluft innerhalb desselben Gehäuses angeordnet sind.In the embodiment shown in Figure 1, it is now a question of providing a 1: 1 gas / air composite control. According to the invention, an electrical or electronic sensor 16 is provided for this. The sensor 16 is designed as a differential pressure sensor, in particular as a flow meter, anemometer or the like. With a measuring point 17, the sensor 16 is connected to the gas line 10 carrying the gas flow. The measuring point 17 is positioned in front of the gas nozzle 15 in the direction of flow of the gas. A reference pressure prevails at a reference point 18 of the electrical or electronic sensor 16, namely the combustion air pressure. For this purpose, no connection between the sensor 16 and the combustion air line 12 is required, in particular if the sensor 16 and the inlet of the combustion air are arranged within the same housing.
Soll, wie bereits erwähnt, beim Aus-führungsbeispiel gemäß Figur 1 für eine 1 : 1 -Gas/Luft- Verbundregelung gesorgt werden, so muß der Gasdruck dem Referenzdmck/Verbrennungsluftdruck entsprechen. In dem Fall, in dem der Sensor 16 als Durchflußmesser bzw. Anemometer ausgebildet ist, bedeutet dies, daß der Durchfluß durch den Sensor 16 Null beträgt. Nimmt z.B. der Gasdruck gegenüber dem Verbrennungsluftdruck ab, so erfahrt der Sensor 16 einen Durchfluß in Richtung auf die Gasleitung 10. Aufgrund der Durchflußmenge können demnach vom Sensor 16 die Druck-verhältnisse zwischen Verbrennungsluftdruck und Gasdruck ermittelt werden.If, as already mentioned, a 1: 1 gas / air composite control is to be provided in the exemplary embodiment according to FIG. 1, the gas pressure must correspond to the reference pressure / combustion air pressure. In the case in which the sensor 16 is designed as a flow meter or anemometer, this means that the flow through the sensor 16 is zero. E.g. If the gas pressure decreases compared to the combustion air pressure, the sensor 16 experiences a flow in the direction of the gas line 10. The pressure ratios between the combustion air pressure and the gas pressure can therefore be determined by the sensor 16 based on the flow rate.
Der Sensor 16 erzeugt abhängig von den obigen Druckverhältnissen ein elektrisches bzw. elektronisches Signal 19, welches zur Verstellung des Gasventils 11 verwendet wird. Gemäß Figur 1 wird das elektrische bzw. elektronische Signal 19 einem Steuer- oder Regelgerät 20 --ugefi-hrt, das aus dem Signal 19 ein Regelungssignal 21 für einen dem Gasventil 11 zugeordneten Stellantrieb 22 erzeugt.Depending on the above pressure conditions, the sensor 16 generates an electrical or electronic signal 19 which is used to adjust the gas valve 11. According to FIG. 1, the electrical or electronic signal 19 is fed to a control or regulating device 20, which generates a control signal 21 for an actuator 22 assigned to the gas valve 11 from the signal 19.
Mit der in Figur 1 dargestellten Regeleinrichtung kann demzufolge eine l:l-Gas/Luft- Verbundregelung bereitgestellt werden. Detektiert der Sensor 16 zwischen Referenzdruck und Gasdruck eine Druckdifferenz von Null, so entspricht das Signal 19 einer Druckdifferenz von Null und das Gasventil 11 kann unverändert betrieben werden. Detektiert der Sensor 16 einen gegenüber dem Gasdruck höheren Referenzdruck, so muß mit Hilfe des vom Sensor 16 erzeugten elektrischen bzw. elektronischen Signals 19 das Gasventil 11 derart angesteuert werden, daß sich der Gasstrom erhöht. Hierzu erzeugt das Regelgerät 20 ein Regelungssignal 21 für den Stellantrieb 22 des Gasventils 11, derart, daß das Signal 19 wieder auf einen Betrag geführt wird, der einer Druckdifferenz von Null entspricht.Accordingly, a 1: 1 gas / air composite control can be provided with the control device shown in FIG. If the sensor 16 detects a pressure difference of zero between the reference pressure and the gas pressure, the signal 19 corresponds to a pressure difference of zero and the gas valve 11 can be operated unchanged. If the sensor 16 detects a reference pressure which is higher than the gas pressure, the gas or valve 11 must be activated with the aid of the electrical or electronic signal 19 generated by the sensor 16 in such a way that the gas flow increases. For this purpose, the control device 20 generates a control signal 21 for the actuator 22 of the gas valve 11, such that the signal 19 is again routed to an amount that corresponds to a pressure difference of zero.
Bei der Regeleinrichtung des Ausführungsbeispiels gemäß Figur 2 kann gegenüber dem Ausführungsbeispiel gemäß Figur 1 ein abweichendes Übersetzungsverhältnis zwischen Gasstrom und Luftstrom realisiert werden, also eine 1 :N-Gas/Luft- Verbundregelung. Zur Gewährleistung eines variablen Übersetzungsverhältnisses zwischen Gasdruck und Verbrennungsluftdruck bzw. Gasstrom und Verbrennungsluftstrom wird das elektrische bzw. elektronische Signal 19 des Sensors 16 in einer Summiereinrichtung 23 mit einem Hilfssignal 24 verrechnet, und zwar bevor das Signal 19 dem Regelgerät 20 zugeführt wird. Dem Regelgerät 20 wird demnach als Eingangssignal das Ausgangssignal 25 der Summiereinrichtung 23 zugeführt, wobei das Ausgangssignal 25 eine additive Überlagerung der Signale 19, 24 ist.In the control device of the exemplary embodiment according to FIG. 2, a different transmission ratio between gas flow and air flow can be realized compared to the exemplary embodiment according to FIG. 1, that is to say a 1: N gas / air compound control. To ensure a variable transmission ratio between gas pressure and combustion air pressure or gas flow and combustion air flow, the electrical or electronic signal 19 of the sensor 16 is offset in a summing device 23 with an auxiliary signal 24, specifically before the signal 19 is supplied to the control device 20. The control device 20 is accordingly supplied with the output signal 25 of the summing device 23 as an input signal, the output signal 25 being an additive superimposition of the signals 19, 24.
Bei dem Hilfssignal 24 handelt es sich um ein von einer Drehzahl des Gebläses 13 funktional abhängiges Signal. Das Hilfssignal 24 wird in einer Auswerteeinrichtung 26 aus einem Drehzahlsignal 27 des Gebläses 13 bzw. des Motors des Gebläses 13 gewonnen. Da das Hilfssignal 24 von der Drehzahl des Gebläses 13 funktional abhängig ist, folgt unmittelbar, daß das Hilfssignal 24 auch vom Verbrennungsluftstrom bzw. Verbrennungsluftdruck abhängig ist.The auxiliary signal 24 is a signal which is functionally dependent on a speed of the fan 13. The auxiliary signal 24 is obtained in an evaluation device 26 from a speed signal 27 of the fan 13 or the motor of the fan 13. Since the auxiliary signal 24 is functionally dependent on the speed of the fan 13, it follows immediately that the auxiliary signal 24 is also dependent on the combustion air flow or combustion air pressure.
In Abweichung vom gezeigten Ausführungsbeispiel ist es möglich, das Hilfssignal 24 auf andere Art und Weise zu generieren. So ist es nicht zwingend erforderlich, daß das Hilfssignal 24 ausgehend von der Drehzahl des Gebläses ermittelt wird. Auch ist es denkbar, einen zusätzlichen, nicht dargestellten Sensor zur Generierung des Hilfssignals 24 vorzusehen. So kann durch Verwendung des Ausgangssignals eines Rauchgassensors als Hilfssignal eine gasadaptive Regelung bereitgestellt werden.In deviation from the exemplary embodiment shown, it is possible to generate the auxiliary signal 24 in a different way. So it is not absolutely necessary that the auxiliary signal 24 is determined based on the speed of the fan. It is also conceivable to provide an additional sensor, not shown, for generating the auxiliary signal 24. Thus, gas-adaptive control can be provided by using the output signal of a smoke gas sensor as an auxiliary signal.
In der Auswerteeinrichtung 26 ist ein Faktor bestimmbar, der das Übersetzungsverhältnis zwischen Gasstrom und Verbrennungsluftstrom bestimmt. Bei diesem Faktor handelt es sich um einen Multiplikationsfaktor. Je höher dieser Multiplikationsfaktor ist, desto höher ist das Übersetzungsverhältnis. Über eine Variation des Multiplikationsfaktors ist das Übersetzungsverhältnis variierbar. A factor can be determined in the evaluation device 26, which determines the transmission ratio between gas flow and combustion air flow. This factor is a multiplication factor. The higher this multiplication factor, the higher the gear ratio. The transmission ratio can be varied by varying the multiplication factor.
Bezugszeichenliste:Reference symbol list:
10 Gasleitung10 gas pipe
11 Gasventil11 gas valve
12 Verbrennungsluftleitunj12 Combustion air duct
13 Gebläse13 blowers
14 Drosselstelle14 throttling point
15 Gasdüse15 gas nozzle
16 Sensor16 sensor
17 Meßpunkt17 measuring point
18 Referenzpunkt18 reference point
19 Signal19 signal
20 Regelgerät20 control device
21 Regelungssignal21 control signal
22 Stellantrieb22 actuator
23 Summiereinrichtung23 summing device
24 Hilfssignal24 auxiliary signal
25 Ausgangssignal25 output signal
26 Auswerteei-nrichtung26 Evaluation device
27 Drehzahlsignal 27 speed signal

Claims

Patentansprüche: Claims:
1. Regeleinrichtung für Gasbrenner zur Bereitstellung eines Gas/Luft-Gemisches, nämlich zum Zuführen eines Gasstroms und eines Verbrennungsluftstroms zu einem Brenner, mit mindestens einem innerhalb einer Gasleitung (10) angeordneten Gasventil (11) und einer innerhalb einer Verbrennungsluftleitung (12) angeordneten Drosselstelle (14), wobei die den Gasstrom führende Gasleitung (10) mit einer Gasdüse (15) in der den Verbrennungsluftstrom führenden Verbrennungsluftleitung (12) endet, und wobei in Strömungsrichtung der Verbrennungsluft die Gasdüse (15) nach der Drosselstelle (14) und vor einem Gebläse (13) angeordnet ist, dadurch gekennzeichnet, daß a) ein elektrischer bzw. elektronischer Sensor (16) mit einem Meßpunkt (17) an der den Gasstrom führenden Gasleitung (10) angreift, b) der Meßpunkt (17) in Strömungsrichtung des Gases vor der Gasdüse (15) angeordnet ist, c) an einen Referen-φunkt (18) des elektrischen bzw. elektronischen Sensors (16) ein Referenzdruck herrscht, d) ein vom Sensor (16) erzeugtes elektrisches bzw. elektronisches Signal (19) zur Verstellung des Gasventils (11) verwendet wird.1. Control device for gas burners for providing a gas / air mixture, namely for supplying a gas flow and a combustion air flow to a burner, with at least one gas valve (11) arranged within a gas line (10) and a throttle point arranged within a combustion air line (12) (14), the gas line (10) leading the gas flow ending with a gas nozzle (15) in the combustion air line (12) leading the combustion air flow, and wherein in the flow direction of the combustion air the gas nozzle (15) after the throttle point (14) and in front of one Fan (13) is arranged, characterized in that a) an electrical or electronic sensor (16) with a measuring point (17) acts on the gas line (10) carrying the gas flow, b) the measuring point (17) in the flow direction of the gas is arranged in front of the gas nozzle (15), c) there is a reference pressure at a reference point (18) of the electrical or electronic sensor (16), d) an electrical or electronic signal (19) generated by the sensor (16) is used to adjust the gas valve (11).
2. Regeleinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß in Abhängigkeit des vom Sensor (16) erzeugten elektrischen bzw. elektronischen Signals (19) ein Regelungssignal (21) für einen dem Gasventils (11) zugeordneten Stellantrieb (22) erzeugt wird.2. Control device according to claim 1, characterized in that a control signal (21) for an actuator (22) associated with the gas valve (11) is generated as a function of the electrical or electronic signal (19) generated by the sensor (16).
3. Regeleinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Sensor (16) als Differenzdruck-Sensor, insbesondere als Durchflußmesser, ausgebildet ist.3. Control device according to claim 1 or 2, characterized in that the sensor (16) is designed as a differential pressure sensor, in particular as a flow meter.
4. Regeleinrichtung nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß eine Summiereinrichtung (23) das elektrische bzw. elektronische4. Control device according to one or more of claims 1 to 3, characterized in that a summing device (23) the electrical or electronic
Signal (19) des Sensors (16) mit einem Hilfssignal (24) verrechnet, und daß ein aus einem Ausgangssignal (25) der Summiereinrichtung (23) erzeugtes Regelungssignal (21) zur Veränderung des Gasstroms verwendet wird.Signal (19) of the sensor (16) is offset with an auxiliary signal (24) and that a control signal (21) generated from an output signal (25) of the summing device (23) is used to change the gas flow.
5. Regeleinrichtung nach Anspruch 4, dadurch gekennzeichnet, daß das Ausgangssignal (25) der Summiereinrichtung (23) einem Regelgerät (20) zuϊührbar ist, wobei das Regelgerät (20) das Regelungssignal (21) für einen Stellantrieb (22) des Gasventils (11) erzeugt. 5. Control device according to claim 4, characterized in that the output signal (25) of the summing device (23) a control device (20) can be fed, the control device (20) the control signal (21) for an actuator (22) of the gas valve (11 ) generated.
6. Regeleinrichtung nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß das Hilfssignal (24) von einer Drehzahl des Gebläses (13) funktional abhängig ist. 6. Control device according to claim 4 or 5, characterized in that the auxiliary signal (24) is functionally dependent on a speed of the fan (13).
EP00934993A 1999-05-14 2000-05-09 Regulating device for gas burners Expired - Lifetime EP1179159B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19922226 1999-05-14
DE19922226A DE19922226C1 (en) 1999-05-14 1999-05-14 Control device for gas burners
PCT/EP2000/004126 WO2000070267A1 (en) 1999-05-14 2000-05-09 Regulating device for gas burners

Publications (2)

Publication Number Publication Date
EP1179159A1 true EP1179159A1 (en) 2002-02-13
EP1179159B1 EP1179159B1 (en) 2004-11-24

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EP00934993A Expired - Lifetime EP1179159B1 (en) 1999-05-14 2000-05-09 Regulating device for gas burners

Country Status (9)

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US (1) US6579087B1 (en)
EP (1) EP1179159B1 (en)
JP (1) JP2002544465A (en)
KR (1) KR20020013872A (en)
AT (1) ATE283452T1 (en)
CA (1) CA2372842A1 (en)
DE (2) DE19922226C1 (en)
ES (1) ES2231206T3 (en)
WO (1) WO2000070267A1 (en)

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JP2002544465A (en) 2002-12-24
KR20020013872A (en) 2002-02-21
ES2231206T3 (en) 2005-05-16
US6579087B1 (en) 2003-06-17
WO2000070267A1 (en) 2000-11-23
DE50008762D1 (en) 2004-12-30
EP1179159B1 (en) 2004-11-24
CA2372842A1 (en) 2000-11-23
ATE283452T1 (en) 2004-12-15
DE19922226C1 (en) 2000-11-30

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