EP2888530B1 - Method for regulating a heating device, and heating device - Google Patents
Method for regulating a heating device, and heating device Download PDFInfo
- Publication number
- EP2888530B1 EP2888530B1 EP13753841.9A EP13753841A EP2888530B1 EP 2888530 B1 EP2888530 B1 EP 2888530B1 EP 13753841 A EP13753841 A EP 13753841A EP 2888530 B1 EP2888530 B1 EP 2888530B1
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- Prior art keywords
- blower
- coefficient
- volume flow
- pressure
- heating device
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- 238000010438 heat treatment Methods 0.000 title claims description 25
- 238000000034 method Methods 0.000 title claims description 14
- 230000001105 regulatory effect Effects 0.000 title claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 33
- 230000003068 static effect Effects 0.000 claims description 17
- 239000000446 fuel Substances 0.000 claims description 8
- 239000008236 heating water Substances 0.000 claims description 4
- 230000001419 dependent effect Effects 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012887 quadratic function Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N3/00—Regulating air supply or draught
- F23N3/002—Regulating air supply or draught using electronic means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N3/00—Regulating air supply or draught
- F23N3/08—Regulating air supply or draught by power-assisted systems
- F23N3/082—Regulating air supply or draught by power-assisted systems using electronic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2225/00—Measuring
- F23N2225/04—Measuring pressure
- F23N2225/06—Measuring pressure for determining flow
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2241/00—Applications
- F23N2241/04—Heating water
-
- 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 method for controlling a heating device according to the preamble of claim 1. Furthermore, the invention relates to a heating device, according to claim 6, for carrying out the method.
- Such heaters are used to heat a heating medium, heating water is usually used.
- the heating device in this case has a combustion chamber in which a fuel, such as a gas, is burned. In this case, combustion air is supplied via a blower. The heat released is transferred to the heating medium in a heat exchanger.
- a correct ratio of the volume of combustion air supplied and the amount of fuel supplied is essential. If too little air is supplied, the fuel can not burn completely. This results in high pollutant emissions, in particular of carbon monoxide and hydrocarbon. If too much air is supplied, the combustion is cooled, which also leads to increased pollutant emissions.
- the blower generally has an impeller whose speed influences a volume flow of the combustion air, ie the volume per unit time. The volume flow can be monitored.
- This method requires a special air duct and several measuring points. It is therefore relatively expensive and therefore expensive. The measurement results can be falsified, for example due to contamination or parameter changes. In addition, there is the problem of drift and other aging phenomena.
- DE 19 945 562 A1 a method for monitoring and / or control of a vehicle heater is described, wherein a rotational speed of a blower for controlling a volume flow of combustion air is regulated.
- combustion in the combustion chamber is monitored by a pressure or sound pressure sensor.
- the invention has for its object to overcome the disadvantages of the prior art and in particular to allow control of the heater with little effort.
- a static pressure and / or a power consumption of the blower are determined, wherein a volumetric flow coefficient is determined on the basis of the rotational speed in conjunction with the static pressure and / or the power consumption.
- a speed detection is usually provided anyway with variable controllable blowers.
- only one sensor for detecting the static pressure and / or the power consumption of the fan must be provided. This can be realized with very little effort. In this case, such sensors are available as a mass-produced very cost.
- reference values for a pressure coefficient and / or a power coefficient as a function of a volumetric flow coefficient at a Reference fan determined are taken into account in the determination of the flow rate.
- the pressure coefficient can be determined after measuring the static pressure and the rotational speed.
- the density of the combustion air can be considered approximately constant. To increase the accuracy of the density can also be detected in addition.
- the diameter of the impeller is constant. By recording speed and power consumption, the power coefficient can be easily calculated.
- the pressure coefficients or coefficients of performance calculated in each case on the basis of the measured rotational speed and the measured power consumption or of the determined static pressure can be determined on the basis of reference values, which were obtained with a geometrically similar fan and deposited, for example, in the form of characteristic curves. From this, the volumetric flow can be determined relatively simply using formula (3) above. The volume flow can therefore be determined with relatively little effort. To increase the reliability of the volume flow may optionally also in two ways in parallel In order to determine the volume flow with sufficient accuracy, the Reynolds number should be sufficiently high and influences of the viscosity should be low. This is usually the case.
- the power consumption of the fan is determined from the recorded by an electric fan motor electric power, wherein an efficiency is taken into account. It is less expensive to detect the electrical power consumption than to determine a mechanical power of the impeller.
- the mechanical power depends on the electrical power and the efficiency, which depends on a load and a motor speed. This efficiency can be determined for example by experiments and then deposited in a controller.
- the static pressure in the flow direction behind the fan is determined.
- the current air pressure can then be determined while the static pressure of the combustion air can be determined relatively accurately during operation.
- the object is also achieved by the heating device for carrying out the method with the features of claim 6.
- This heating device is used for heating a heating medium, in particular heating water, and has a combustion chamber into which combustion air can be supplied via a blower and fuel via a feed line.
- the heating device has a rotational speed sensor and a pressure sensor and / or a power sensor.
- a heating device which has a fan 1, a burner, a heat exchanger 3, a discharge channel 4 and a discharge pipe 5.
- Combustion air is conveyed into a combustion chamber of the heating device via the blower 1.
- the burner 2 is fuel, such as a gas, promoted. This is not shown.
- this has a supply interface 1.2.
- the heat released in the burner is transferred to a heating medium, such as heating water.
- a volume flow is significantly influenced by a speed of the blower 1.
- the speed of an impeller is therefore detected by means of a speed sensor 1.1, which is formed for example as a Hall sensor.
- a pressure sensor 1.3 a static pressure of the combustion air between the fan 1 and burner 2 is determined.
- the pressure sensor 1.3 and the speed sensor 1.1 are connected to a controller 6, which calculates a volume flow on the basis of the determined values for a speed of the impeller and the static pressure.
- the controller 6 has a memory in which reference values for a pressure coefficient, a power coefficient and a volumetric flow coefficient are stored in the form of characteristic curves. These reference values have been determined on a reference fan and are applicable to fans with similar geometrical dimensions. The determination of the volume flow can therefore be relatively easy by detecting the speed and the static pressure.
- Fig. 2 is one opposite Fig. 1 slightly modified embodiment shown.
- the same and corresponding elements are provided with the same reference numerals.
- a power consumption is measured by a power sensor and the controller 6 is provided.
- a measurement of the electrical power which is supplied to a motor of the blower 1 takes place. Based on this power and the speed then the controller calculates the guided through the fan 1 to the burner 2 and in the combustion chamber volume flow.
- Fig. 3 is a diagram in which in a first characteristic curve a pressure coefficient H and in a second characteristic curve a power coefficient P is plotted in each case over a volume flow coefficient F. These are characteristic curves that have been determined from reference values.
- the method according to the invention and the heating device according to the invention thus make it possible to determine the volume flow with little effort. Only two sensors are required, namely a speed sensor and a pressure sensor or a speed sensor and a power sensor. Incidentally, the calculation is based on fixed values and dependencies. Thus, the determination of the volume flow is subject only to a low error rate. A clean, low-emission combustion can be ensured with it.
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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)
- Air-Conditioning For Vehicles (AREA)
Description
Die Erfindung betrifft ein Verfahren zur Regelung einer Heizeinrichtung nach dem Oberbegriff des Patentanspruches 1. Ferner betrifft die Erfindung eine Heizeinrichtung, gemäß Anspruch 6, zur Durchführung des Verfahrens.The invention relates to a method for controlling a heating device according to the preamble of
Derartige Heizeinrichtungen dienen zur Erwärmung eines Heizmediums, wobei in der Regel Heizwasser eingesetzt wird. Die Heizeinrichtung weist dabei einen Brennraum auf, in dem ein Brennstoff, wie beispielsweise ein Gas, verbrannt wird. Dabei wird Verbrennungsluft über ein Gebläse zugeführt. Die freiwerdende Wärme wird in einem Wärmetauscher an das Heizmedium übertragen.Such heaters are used to heat a heating medium, heating water is usually used. The heating device in this case has a combustion chamber in which a fuel, such as a gas, is burned. In this case, combustion air is supplied via a blower. The heat released is transferred to the heating medium in a heat exchanger.
Für eine saubere Verbrennung ist ein richtiges Verhältnis vom zugeführten Verbrennungsluftvolumen und zugeführter Brennstoffmenge wesentlich. Wird zu wenig Luft zugeführt, kann der Brennstoff nicht vollständig verbrennen. Dadurch ergeben sich hohe Schadstoffemissionen, insbesondere von Kohlenmonoxid und Kohlenwasserstoff. Wird zu viel Luft zugeführt, wird die Verbrennung abgekühlt, was ebenfalls zu erhöhten Schadstoffemissionen führt.For proper combustion, a correct ratio of the volume of combustion air supplied and the amount of fuel supplied is essential. If too little air is supplied, the fuel can not burn completely. This results in high pollutant emissions, in particular of carbon monoxide and hydrocarbon. If too much air is supplied, the combustion is cooled, which also leads to increased pollutant emissions.
Üblicherweise erfolgt eine Steuerung der Menge an zugeführter Verbrennungsluft durch die entsprechende Ansteuerung des Gebläses. Das Gebläse weist in der Regel ein Gebläserad auf, dessen Drehzahl einen Volumenstrom der Verbrennungsluft beeinflusst, also das Volumen je Zeiteinheit. Dabei kann der Volumenstrom überwacht werden.Usually, a control of the amount of supplied combustion air by the corresponding control of the blower. The blower generally has an impeller whose speed influences a volume flow of the combustion air, ie the volume per unit time. The volume flow can be monitored.
Es ist bekannt, den Volumenstrom durch Differenzdruckmessung zu ermitteln. Dafür wird beispielsweise in
Dieses Verfahren benötigt eine spezielle Luftführung und mehrere Messstellen. Es ist daher relativ aufwendig und damit kostenintensiv. Dabei können die Messergebnisse beispielsweise durch Verschmutzungen oder durch Parameteränderungen verfälscht werden. Außerdem besteht das Problem von Drift- und anderen Alterungserscheinungen.This method requires a special air duct and several measuring points. It is therefore relatively expensive and therefore expensive. The measurement results can be falsified, for example due to contamination or parameter changes. In addition, there is the problem of drift and other aging phenomena.
In
In
Ferner ist es bekannt, einen Massenstrom über Heizdrahtsensoren zu ermitteln. Diese sind jedoch relativ teuer und empfindlich. Dabei treten häufig Drifterscheinungen auf.Furthermore, it is known to determine a mass flow via heating wire sensors. However, these are relatively expensive and sensitive. Drifting often occurs.
Der Erfindung liegt die Aufgabe zugrunde, die Nachteile des Standes der Technik zu beseitigen und insbesondere eine Regelung der Heizeinrichtung mit geringem Aufwand zu ermöglichen.The invention has for its object to overcome the disadvantages of the prior art and in particular to allow control of the heater with little effort.
Erfindungsgemäß wird dies mit den Merkmalen des Patentanspruches 1 gelöst. Vorteilhafte Weiterbildungen sind den Unteransprüchen zu entnehmen.This is achieved with the features of
Gemäß Anspruch 1 werden ein statischer Druck und/oder eine Leistungsaufnahme des Gebläses ermittelt, wobei ein Volumenstromkoeffizient anhand der Drehzahl in Verbindung mit dem statischen Druck und/oder der Leistungsaufnahme bestimmt wird. Eine Drehzahlerfassung ist bei variabel ansteuerbaren Gebläsen in der Regel ohnehin vorgesehen. Zusätzlich muss also nur ein Sensor zur Erfassung des statischen Drucks und/oder der Leistungsaufnahme des Gebläses vorgesehen werden. Dies lässt sich mit sehr wenig Aufwand realisieren. Dabei sind derartige Sensoren als Massenartikel sehr kostengünstig erhältlich.According to
Bevorzugterweise werden Referenzwerte für einen Druckkoeffizienten und/oder einen Leistungskoeffizienten in Abhängigkeit von einem Volumenstromkoeffizienten an einem Referenzgebläse ermittelt, wobei die Referenzwerte bei der Bestimmung des Volumenstromes berücksichtigt werden. Der Druckkoeffizient H ist abhängig von der Erdbeschleunigung g, der Drehzahl N, dem Durchmesser D des Gebläserades sowie dem statischen Druck h und berechnet sich nach folgender Formel:
Da es sich bei der Erdbeschleunigung g um eine konstante Größe und beim Durchmesser des Gebläserades um eine bekannte, unveränderbare Größe handelt, lässt sich nach Messung des statischen Drucks und der Drehzahl der Druckkoeffizient bestimmen.Since the acceleration due to gravity g is a constant variable and the diameter of the impeller is a known, unchangeable variable, the pressure coefficient can be determined after measuring the static pressure and the rotational speed.
Der Leistungskoeffizient P ist abhängig von der Leistungsaufnahme W, der Dichte der Verbrennungsluft p, der Drehzahl N, dem Durchmesser D und berechnet sich nach folgender Formel:
Die Dichte der Verbrennungsluft kann näherungsweise als konstant angesehen werden. Zur Erhöhung der Genauigkeit kann die Dichte aber auch zusätzlich erfasst werden. Der Durchmesser des Gebläserades ist konstant. Durch Erfassung von Drehzahl und Leistungsaufnahme lässt sich der Leistungskoeffizient also einfach berechnen.The density of the combustion air can be considered approximately constant. To increase the accuracy of the density can also be detected in addition. The diameter of the impeller is constant. By recording speed and power consumption, the power coefficient can be easily calculated.
Der Volumenstromkoeffizient F, der eine quadratische Funktion des Druckkoeffizienten und des Leistungskoeffizienten ist, ist abhängig vom Volumenstrom V, der Drehzahl N sowie dem Durchmesser D und berechnet sich nach folgender Formel:
Zu den jeweils auf Grundlage der gemessenen Drehzahl und der gemessenen Leistungsaufnahme bzw. des ermittelten statischen Drucks berechneten Druckkoeffizienten oder Leistungskoeffizienten lässt sich anhand von Referenzwerten, die bei einem geometrisch ähnlichen Gebläse gewonnen wurden und beispielsweise in Form von Kennlinien hinterlegt sind, der Volumenstromkoeffizient bestimmen. Daraus lässt sich dann relativ einfach der Volumenstrom anhand obiger Formel (3) bestimmen. Der Volumenstrom kann also mit relativ geringem Aufwand ermittelt werden. Zur Erhöhung der Betriebssicherheit kann der Volumenstrom gegebenenfalls auch auf zwei Wegen parallel ermittelt werden, also einmal über die Messung der Leistungsaufnahme und zum anderen über die Erfassung des statischen Drucks. Um den Volumenstrom mit ausreichender Genauigkeit bestimmen zu können, sollte die Reynoldszahl ausreichend hoch sein und Einflüsse der Viskosität sollten gering sein. Dies ist in der Regel aber gegeben.The pressure coefficients or coefficients of performance calculated in each case on the basis of the measured rotational speed and the measured power consumption or of the determined static pressure can be determined on the basis of reference values, which were obtained with a geometrically similar fan and deposited, for example, in the form of characteristic curves. From this, the volumetric flow can be determined relatively simply using formula (3) above. The volume flow can therefore be determined with relatively little effort. To increase the reliability of the volume flow may optionally also in two ways in parallel In order to determine the volume flow with sufficient accuracy, the Reynolds number should be sufficiently high and influences of the viscosity should be low. This is usually the case.
Vorzugsweise wird die Leistungsaufnahme des Gebläses aus der von einem elektrischen Gebläsemotor aufgenommenen elektrischen Leistung ermittelt, wobei ein Wirkungsgrad berücksichtig wird. Es ist mit weniger Aufwand verbunden, die elektrische Leistungsaufnahme zu erfassen, als eine mechanische Leistung des Gebläserades zu bestimmen. Dabei ist die mechanische Leistung von der elektrischen Leistung und dem Wirkungsgrad abhängig, der von einer Last und einer Motorgeschwindigkeit abhängig ist. Dieser Wirkungsgrad kann beispielsweise durch Versuche ermittelt werden und dann in einer Steuerung hinterlegt sein. Der Zusammenhang zwischen elektrischer Leistungsaufnahme und mechanischer Leistung stellt sich wie folgt da, wobei η e den Wikrungsgrad bezeichnet, der beispielsweise von der Last und einer Motorgeschwindigkeit abhängig ist.:
Vorzugsweise wird der statische Druck in Strömungsrichtung hinter dem Gebläse ermittelt. Bei ausgeschaltetem Gebläse kann dann der aktuelle Luftdruck ermittelt werden während im Betrieb der statische Druck der Verbrennungsluft relativ genau bestimmt werden kann.Preferably, the static pressure in the flow direction behind the fan is determined. When the blower is switched off, the current air pressure can then be determined while the static pressure of the combustion air can be determined relatively accurately during operation.
Die Aufgabe wird auch durch die Heizeinrichtung zur Durchführung des Verfahrens mit den Merkmalen des Anspruchs 6 gelöst.The object is also achieved by the heating device for carrying out the method with the features of
Diese Heizeinrichtung dient zum Erwärmen eines Heizmediums, insbesondere von Heizwasser, und weist einen Brennraum auf, in den über ein Gebläse Verbrennungsluft und über eine Zuleitung Brennstoff zuführbar ist. Dabei weist die Heizeinrichtung einen Drehzahlsensor und einen Drucksensor und/oder einen Leistungssensor auf. Durch Bestimmung des Volumenstroms der Verbrennungsluft lässt sich die Verbrennung dann gut regeln. Insbesondere kann das zugeführte Volumen an Verbrennungsluft in Abhängigkeit von der Menge an zugeführten Brennstoff angepasst werden. Damit wird eine optimale Verbrennung gewährleistet.This heating device is used for heating a heating medium, in particular heating water, and has a combustion chamber into which combustion air can be supplied via a blower and fuel via a feed line. In this case, the heating device has a rotational speed sensor and a pressure sensor and / or a power sensor. By determining the volume flow of the combustion air, the combustion can then be regulated well. In particular, the volume of combustion air supplied may be adjusted depending on the amount of fuel supplied. This ensures optimal combustion.
Die Erfindung wird im Folgenden anhand verschiedener Ausführungsbeispiel in Verbindung mit den Zeichnungen näher beschrieben. Hierin zeigen in schematischer Ansicht:
- Fig. 1
- eine Heizeinrichtung einer ersten Ausführungsform,
- Fig. 2
- eine Heizeinrichtung einer zweiten Ausführungsform und
- Fig. 3
- ein Diagramm mit einer Leistungskoeffizientenkennlinie und einer Druckkoeffizientenkennlinie.
- Fig. 1
- a heater of a first embodiment,
- Fig. 2
- a heater of a second embodiment and
- Fig. 3
- a diagram with a power coefficient characteristic and a pressure coefficient characteristic.
In
Im Wärmetauscher 3 wird die im Brenner frei werdende Wärme an ein Heizmedium, wie beispielsweise Heizwasser, übertragen.In the
Für eine saubere und emissionsarme Verbrennung ist es erforderlich, das zugeführte Volumen an Verbrennungsluft auf die zugeführte Menge an Brennstoff abzustimmen. Ein Volumenstrom wird dabei wesentlich durch eine Drehzahl des Gebläses 1 beeinflusst. Die Drehzahl eines Gebläserades wird daher mittels eines Drehzahlsensors 1.1 erfasst, der beispielsweise als Hall-Sensor ausgebildet ist. Über einen Drucksensor 1.3 wird ein statischer Druck der Verbrennungsluft zwischen Gebläse 1 und Brenner 2 ermittelt.For a clean and low-emission combustion, it is necessary to match the volume of combustion air supplied to the amount of fuel supplied. A volume flow is significantly influenced by a speed of the
Der Drucksensor 1.3 und der Drehzahlsensor 1.1 sind mit einer Steuerung 6 verbunden, die anhand der ermittelten Werte für eine Drehzahl des Gebläserades und des statischen Druckes einen Volumenstrom berechnet. Dafür weist die Steuerung 6 einen Speicher auf, in der Referenzwerte für einen Druckkoeffizienten, einen Leistungskoeffizienten und einen Volumenstromkoeffizienten in Form von Kennlinien hinterlegt sind. Diese Referenzwerte sind an einem Referenzgebläse ermittelt worden und sind auf Gebläse mit ähnlichen geometrischen Abmessungen übertragbar. Die Bestimmung des Volumenstromes kann also relativ einfach durch Erfassung der Drehzahl und des statischen Drucks erfolgen.The pressure sensor 1.3 and the speed sensor 1.1 are connected to a
In
Neben der Erfassung der Drehzahl des Gebläserades über den Drehzahlmesser 1.1 wird bei dieser Ausführungsform eine Leistungsaufnahme über einen Leistungssensor gemessen und der Steuerung 6 zur Verfügung gestellt. Dabei erfolgt eine Messung der elektrischen Leistung, die einem Motor des Gebläses 1 zugeführt wird. Anhand dieser Leistung und der Drehzahl berechnet dann die Steuerung den durch das Gebläse 1 zum Brenner 2 bzw. in den Brennraum geführten Volumenstrom.In addition to the detection of the rotational speed of the impeller via the tachometer 1.1 in this embodiment, a power consumption is measured by a power sensor and the
Durch Erfassung der Drehzahl und des statischen Druckes ist es mit oben angegebener Formel (1) möglich, den Druckkoeffizienten zu bestimmen. Aus der Kennlinie gemäß
In entsprechender Weise lässt sich durch Erfassung der Drehzahl und der aufgenommenen Leistung mit obiger Formel (2) der Leistungskoeffizient ermitteln und anhand der Kennlinie in
Das erfindungsgemäße Verfahren und die erfindungsgemäße Heizeinrichtung ermöglichen also die Ermittlung des Volumenstroms mit geringem Aufwand. Dabei sind nur zwei Sensoren erforderlich, nämlich ein Drehzahlsensor und ein Drucksensor oder ein Drehzahlsensor und ein Leistungssensor. Im Übrigen erfolgt die Berechnung anhand von fest hinterlegten Werten und Abhängigkeiten. Damit unterliegt die Bestimmung des Volumenstroms nur einer geringen Fehlerhäufigkeit. Eine saubere, emissionsarme Verbrennung kann damit sichergestellt werden.The method according to the invention and the heating device according to the invention thus make it possible to determine the volume flow with little effort. Only two sensors are required, namely a speed sensor and a pressure sensor or a speed sensor and a power sensor. Incidentally, the calculation is based on fixed values and dependencies. Thus, the determination of the volume flow is subject only to a low error rate. A clean, low-emission combustion can be ensured with it.
Claims (6)
- Method for regulating a heating device which has a combustion chamber into which combustion air is introduced via a controllable blower with a blower wheel, a rotational speed of the blower wheel being detected, characterized in that a static pressure and/or a power consumption of the blower is measured, a volume flow coefficient being determined on the basis of the measured rotational speed in conjunction with the measured static pressure and/or in conjunction with the measured power consumption, and a volume flow of the combustion air being determined on the basis of the volume flow coefficient.
- Method according to Claim 1, characterized in that reference values for a pressure coefficient and/or a power coefficient are ascertained in dependence on a volume flow coefficient, the reference values being taken into account when determining the volume flow.
- Method according to Claim 2, characterized in that the reference values are stored in the form of a pressure coefficient characteristic and/or a power coefficient characteristic.
- Method according to one of Claims 1 to 3, characterized in that the power consumption of the blower is ascertained from the electrical power consumed by an electrical blower motor, an efficiency being taken into account.
- Method according to one of Claims 1 to 4, characterized in that the static pressure is ascertained downstream from the blower in the direction of flow.
- Heating device for heating a heating medium, in particular heating water, comprising a combustion chamber, into which combustion air can be fed via a blower (1) and into which fuel can be fed via a feed line, the heating device having a rotational speed sensor (1.1), characterized in that the heating device has a pressure sensor (1.3) for ascertaining a static pressure and/or a power sensor (1.4) for ascertaining a power consumption of the blower and a controller (6) for ascertaining a volume flow on the basis of a volume flow coefficient, which is determined from the measured rotational speed in conjunction with the measured pressure and/or in conjunction with the measured power consumption, the regulating of the heating device being performed by a method according to one of Claims 1 to 5.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012016606.0A DE102012016606A1 (en) | 2012-08-23 | 2012-08-23 | Method for controlling a heating device and heating device |
PCT/EP2013/067215 WO2014029721A1 (en) | 2012-08-23 | 2013-08-19 | Method for regulating a heating device, and heating device |
Publications (2)
Publication Number | Publication Date |
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EP2888530A1 EP2888530A1 (en) | 2015-07-01 |
EP2888530B1 true EP2888530B1 (en) | 2017-04-12 |
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EP13753841.9A Active EP2888530B1 (en) | 2012-08-23 | 2013-08-19 | Method for regulating a heating device, and heating device |
Country Status (9)
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US (1) | US20150233578A1 (en) |
EP (1) | EP2888530B1 (en) |
KR (1) | KR102119376B1 (en) |
CN (1) | CN104583679B (en) |
AU (1) | AU2013305101B2 (en) |
DE (1) | DE102012016606A1 (en) |
ES (1) | ES2632942T3 (en) |
PT (1) | PT2888530T (en) |
WO (1) | WO2014029721A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020043887A1 (en) * | 2018-08-30 | 2020-03-05 | Bosch Termotecnologia S.A. | Method for controlling a heating device, and heating device |
Families Citing this family (9)
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EP2413047B2 (en) † | 2010-07-30 | 2021-11-17 | Grundfos Management A/S | Domestic water heating unit |
PL3271655T3 (en) * | 2015-03-17 | 2020-05-18 | Intergas Heating Assets B.V. | Device and method for mixing combustible gas and combustion air, hot water installation provided therewith, corresponding thermal mass flow sensor and method for measuring a mass flow rate of a gas flow |
PT108703B (en) | 2015-07-17 | 2021-03-15 | Bosch Termotecnologia, S.A. | DEVICE FOR HEATING DEVICES AND PROCESS FOR THE OPERATION OF A DEVICE FOR HEATING DEVICES |
FR3039260B1 (en) * | 2015-07-23 | 2017-08-25 | Bosch Gmbh Robert | METHOD FOR MANAGING A CONDENSATION AND CHADIER BOILER FOR IMPLEMENTING THE METHOD |
CN106642711B (en) * | 2015-09-22 | 2022-09-16 | 艾欧史密斯(中国)热水器有限公司 | Dual sensing combustion system |
US10962257B2 (en) * | 2015-12-09 | 2021-03-30 | Fulton Group N.A., Inc. | Compact fluid heating system with high bulk heat flux using elevated heat exchanger pressure drop |
PL3296634T3 (en) * | 2016-09-14 | 2019-05-31 | Valeo Thermal Commercial Vehicles Germany GmbH | Method of maintaining the combustion air flow rate fed to the combustion chamber and heating apparatus operating according to such a method |
EP3321582A1 (en) * | 2016-11-14 | 2018-05-16 | Hubert Ziegler | Device for regulating a chimney pressure of a fireplace and method for constant chimney pressure controlling |
DE102018104242A1 (en) * | 2018-02-26 | 2019-08-29 | Eberspächer Climate Control Systems GmbH & Co. KG | A method of operating a fuel-powered vehicle heater |
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- 2013-08-19 PT PT137538419T patent/PT2888530T/en unknown
- 2013-08-19 KR KR1020157004326A patent/KR102119376B1/en active IP Right Grant
- 2013-08-19 WO PCT/EP2013/067215 patent/WO2014029721A1/en active Application Filing
- 2013-08-19 ES ES13753841.9T patent/ES2632942T3/en active Active
- 2013-08-19 US US14/423,323 patent/US20150233578A1/en not_active Abandoned
- 2013-08-19 CN CN201380044363.9A patent/CN104583679B/en active Active
- 2013-08-19 AU AU2013305101A patent/AU2013305101B2/en not_active Ceased
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WO2020043887A1 (en) * | 2018-08-30 | 2020-03-05 | Bosch Termotecnologia S.A. | Method for controlling a heating device, and heating device |
Also Published As
Publication number | Publication date |
---|---|
CN104583679B (en) | 2017-11-17 |
US20150233578A1 (en) | 2015-08-20 |
AU2013305101A1 (en) | 2015-04-09 |
EP2888530A1 (en) | 2015-07-01 |
WO2014029721A1 (en) | 2014-02-27 |
ES2632942T3 (en) | 2017-09-18 |
KR20150045440A (en) | 2015-04-28 |
CN104583679A (en) | 2015-04-29 |
DE102012016606A1 (en) | 2014-02-27 |
PT2888530T (en) | 2017-05-08 |
KR102119376B1 (en) | 2020-06-09 |
AU2013305101B2 (en) | 2017-08-24 |
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