EP3382277B1 - Erkennung einer blockierung - Google Patents

Erkennung einer blockierung Download PDF

Info

Publication number
EP3382277B1
EP3382277B1 EP18159377.3A EP18159377A EP3382277B1 EP 3382277 B1 EP3382277 B1 EP 3382277B1 EP 18159377 A EP18159377 A EP 18159377A EP 3382277 B1 EP3382277 B1 EP 3382277B1
Authority
EP
European Patent Office
Prior art keywords
fuel
control
control device
control signal
air
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.)
Active
Application number
EP18159377.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3382277A1 (de
Inventor
Bernd Schmiederer
Holger HOLFELDER
Rainer Lochschmied
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Priority to PL18159377T priority Critical patent/PL3382277T3/pl
Publication of EP3382277A1 publication Critical patent/EP3382277A1/de
Application granted granted Critical
Publication of EP3382277B1 publication Critical patent/EP3382277B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • 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
    • F23N5/123—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 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
    • 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
    • F23N5/003—Systems for controlling combustion using detectors sensitive to combustion gas properties
    • 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
    • F23N5/00—Systems for controlling combustion
    • F23N5/26—Details
    • F23N5/265—Details using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2208/00—Control devices associated with burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2211/00—Flue gas duct systems
    • F23J2211/10—Balanced flues (combining air supply and flue gas exhaust)
    • F23J2211/101—Balanced flues (combining air supply and flue gas exhaust) with coaxial duct arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2213/00—Chimneys or flues
    • F23J2213/70—Safety arrangements
    • 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
    • F23N2225/26—Measuring humidity
    • F23N2225/30—Measuring humidity measuring lambda
    • 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
    • F23N2900/00—Special features of, or arrangements for controlling combustion
    • F23N2900/05001—Measuring CO content in flue gas
    • 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
    • F23N2900/05005—Mounting arrangements for sensing, detecting or measuring devices

Definitions

  • the present disclosure deals with the detection of a blockage in the supply air duct or exhaust gas duct of a burner device.
  • the present disclosure is concerned with blockages in the form of covers and with burner devices for burning fossil fuels.
  • the air ratio can be determined and / or adjusted during the combustion using an ionization current through an ionization electrode.
  • An alternating voltage is first applied to the ionization electrode. Due to the rectifying effect of a flame, an ionization current flows as a direct current in only one direction.
  • the setpoint for the ionization current detected at the ionization electrode is plotted against the speed of the fan of a gas burner.
  • the ionization current is typically measured in microamps.
  • the speed of the fan of a gas burner is typically measured in revolutions per minute.
  • the speed of the blower of a gas burner is at the same time a measure for the air volume flow and for the output of the burner system, i.e. for the amount of heat per time.
  • the speed detection practically does not detect the change in the volume flow due to the change in the supply air duct / flue gas duct. If there is no further indicator for the air volume flow, the desired value of the ionization flow is therefore not adapted due to the functional relationship between the ionization flow setpoint and the fan speed. In this way, the actual air volume flow is regulated with an incorrect ionization flow target value.
  • the drift can occur due to bending of the ionization electrode and / or the formation of deposits and / or damage to the ionization electrode. Tests that correct this drift usually have to be carried out at specific, fixed speed points. If these points are not reached, for example because the heat cannot be dissipated, the burner system would have to be switched off and / or locked. Because without switching off and / or locking it cannot be guaranteed that no critical emissions will occur.
  • EP3045816A1 Device for controlling a burner system
  • EP3045816A1 discloses and claims a device for regulating a burner system which allows an ionization current to be estimated even if a measurement of the same fails. For this purpose, an estimate of the ionization flow is carried out for an air volume flow that belongs to a burner output, at which under certain circumstances no measurement was possible.
  • EP2466204B1 discloses and claims a control device for a burner system.
  • a control device carries out a test procedure in several steps.
  • EP1293727B1 Control device for a burner and setting procedure
  • EP1293727B1 describes how the ionization current setpoint is increased in the closed control loop.
  • the change in the gas valve position or an equivalent such as a coulter parameter is measured.
  • this method can only be used at defined burner power points.
  • the sample variance of the valves has a significant influence on the result. This restricts the applicability of the method described there.
  • EP0806610A2 Method and device for operating a gas burner, was filed on April 9, 1997 and published on November 12, 1997.
  • EP0806610A2 deals with switching off a gas burner if an ionization signal leaves a permissible control range for longer than a predetermined period of time.
  • the permissible control range includes an upper maximum value of the ionization signal and a lower limit value.
  • the lower limit is above a limit at which combustion is no longer low in emissions.
  • EP0770824A2 Method and circuit for regulating a gas burner, was registered on October 1, 1996 and published on May 2, 1997. After the in EP0770824A2 disclosed method, an ionization signal is measured and its maximum value is stored. With that An electrical setpoint value of a control circuit is adjusted to the maximum value. The aim is that the control circuit regulates to the same lambda setpoint.
  • the subject matter of the present disclosure is a method and / or a controller for detecting blockages in the supply air duct and / or exhaust gas duct, with which the aforementioned disadvantages are at least partially overcome.
  • Another subject matter of the present disclosure is a method and / or a controller for detecting drift of the ionization signal due to the formation of deposits and / or bending of the ionization electrode without specific, fixed speeds having to be achieved within a predetermined period of time.
  • the present disclosure teaches a method and / or a control device for a burner device with the aim of detecting covers and / or blockages. This goes hand in hand with the avoidance of undesirable carbon monoxide (CO emissions) emissions.
  • the method is based on a technical investigation of the control limits of an ionization current control circuit after the ionization current setpoint value has been changed compared to normal control operation. It is assumed that the supply air duct and / or exhaust gas duct of a burner device is covered and / or blocked if the control circuit operates outside its control limits.
  • the present disclosure teaches a method with which undesired emissions due to drift due to the formation of deposits and / or bending of the ionization electrode are uncovered.
  • the method can advantageously be carried out at each speed point without the need to store special characteristic values for individual speed points.
  • the speed of a fan in the supply air duct and / or in the exhaust gas duct of a burner device is first determined.
  • a setpoint value for an ionization current of an ionization electrode is determined from the speed of the fan, preferably using a characteristic curve.
  • the specific ionization current setpoint value is then increased by one increment.
  • An attempt is then made to regulate the fuel actuator of the burner device at a constant fan speed using the increased ionization current. If the control loop fails during this attempt, it is concluded that there is combustion with and / or near undesired emissions. Such a burn is caused, for example, due to covering and / or blocking and / or due to the formation of deposits and / or bending. An error is output accordingly.
  • the method described is to be referred to here as testing for steady-state control with an increased ionization current setpoint value and / or testing for steady-state control.
  • the burner device is switched off and / or locked by closing a fuel actuator.
  • the current position of a fuel actuator and a speed of the fan are determined. From the speed of the fan, using a low-calorific characteristic curve, a low-calorific position of the fuel actuator is determined which belongs to the low-calorific characteristic curve.
  • a high-calorific position of the fuel actuator, which belongs to the high-calorific characteristic curve is also determined from the speed of the fan using a high-calorific characteristic curve.
  • the current position is compared with the low-calorific position and with the high-calorific position of the fuel actuator.
  • a relative position is determined, preferably in percent, which indicates the position of the current position relative to the low-calorific and high-calorific position of the fuel actuator.
  • the change over time and / or fluctuation over time in the relative position is averaged using a first low-pass filter with a first time constant to form a first mean value. Furthermore, temporal fluctuations in the relative position are averaged to a second mean value using a second low-pass filter with a second time constant. The first and second mean values become one another compared. If the first and the second mean value differ from one another by a predetermined threshold value, there is an increase in the nominal value of the ionization current by a predetermined increment.
  • Another aim of the present disclosure is to provide a method and / or a control device for a burner device, wherein the detection of a cover and / or blockage is also possible when the fluid flow in the supply air duct and / or exhaust duct is set based on a fan speed and not is detected by means of a sensor.
  • Another aim of the present disclosure is to provide a method and / or a regulating device for a burner device, at least one actuator being controlled and / or regulated using a pulse-width-modulated signal.
  • Another related aim of the present disclosure is to provide a method and / or a control device for a burner device, by means of which a cover and / or blockage of the supply air duct and / or exhaust gas duct can be recognized during the operation of a burner system.
  • the system does not have to be taken out of operation in order to detect a cover and / or blockage.
  • the present disclosure teaches to provide a method and / or a control device for a burner device, in which the control device divides the adjustable speed range into individual bands, with a test for steady-state control with increased ionization current at any speed within a band being representative of tests for steady-state speed is within the band at any speed.
  • a further aim of the present disclosure is to mark a speed range in which a test for stationary control with increased ionization current has been successfully carried out and to no longer carry out a test for stationary control during operation within a marked band and / or during operation within to request and / or carry out a test for stationary regulation of an unmarked band.
  • FIG 1 shows a block diagram of a burner system consisting of burner 1 and a furnace 2 with a heat exchanger.
  • a motor-driven fan 3 conveys the combustion air 4 to the burner 1.
  • the fuel 6, preferably a fuel gas is mixed with the combustion air.
  • the amount of the added fuel 6 is set via a motor-adjustable fuel valve 5.
  • the amount of fuel is transmitted from the regulating, control and / or monitoring unit 10 to the fuel valve 5 via the actuating signal 13. This can be done with an analog signal, as a pulse width modulated signal or but also digitally, for example via a bus system.
  • the amount of air is transmitted via the signal 11 from the regulating, control and / or monitoring unit 10 to the fan 3.
  • the value 11 can equally be transmitted as an analog signal, as a pulse-width-modulated signal or digitally, for example via a bus system.
  • the fan then adjusts the amount of air according to the transmitted signal. It returns a speed signal 12, which corresponds to the speed of the fan wheel, to the regulating, control and monitoring unit 10.
  • the reason for this is that the fan does not react sufficiently reproducibly to the control signal 11, for example because of the friction of the bearing from the fan wheel due to different operating conditions such as temperature and / or starting behavior.
  • the air quantity can therefore only be set (reproducibly) via the speed 12 by the regulating, control and / or monitoring unit 10, for example via a closed speed control loop.
  • the fuel-air ratio can also be determined on the basis of the ionization signal 14, which is read into the regulating, control and / or monitoring unit 10 with the aid of the electrode 7. This takes place in that an alternating voltage is applied to the ionization electrode 7. The mean direct current component of the current through the ionization electrode 7 is measured.
  • An ionization electrode 7 detects an ionization current.
  • An alternating voltage in the range 110 V ... 240 V is typically applied to the ionization electrode 7. Due to the diode effect of the flame in the current circuit between the ionization electrode 7 and the counter electrode, usually the burner 1, a direct current flows through the ionization circuit, superimposed on an alternating current. This direct current increases with increasing ionization of the gas in the flame area. On the other hand, the direct current decreases as the excess air in the combustion increases. For further processing of the signal from the ionization electrode, it is common to use a low-pass filter so that the ionization current arises from the filtered ionization signal.
  • the direct current that occurs is typically in the range of less than 150 microamps, often even well below this value.
  • a device for separating direct current and alternating current of an ionization electrode is for example in EP1154203B1 , FIG 1 , shown and explained, among other things, in section 12 of the description. To the relevant parts of the disclosure of EP1154203B1 is referred to here.
  • Ionization electrodes 7 as used here are commercially available. KANTHAL®, e.g. APM® or A-1®, are often used as the material for the ionization electrodes 7. Electrodes made from Nikrothal® are also considered by the person skilled in the art.
  • the exhaust gas 9 generated by the combustion process and cooled in the heat exchanger 2 is led to the outside through an exhaust gas duct 8, the length of which can vary from system to system.
  • the exhaust gas duct 8 can furthermore be completely or partially closed and / or blocked by external influences.
  • a partial closure and / or a partial blockage of the exhaust gas duct 8 is a first section of exhaust gas duct 8 open and a second section of exhaust gas duct 8 closed and / or blocked.
  • Such external influences are, for example, a faulty narrowing and / or a covering of the exhaust gas path 8 by craftsmen, due to a malfunction of an exhaust gas flap and / or icing of the exhaust gas path 8 in winter.
  • the cross section for the air supply 4 may be incorrectly narrowed for the same reasons. Due to the constriction in the supply air or exhaust gas path 8, the measured speed signal 12 is assigned to a different air throughput 4 than when the characteristic curve was set FIG 2 was the case.
  • an ionization current setpoint value 15 is assigned to the measured rotational speed 12 via a characteristic curve 16.
  • the speed 12 corresponds to an air throughput 4 corresponding to the flow resistance of the supply air / exhaust gas path 8 as when the characteristic curve 16 was recorded slightly on the assignment of speed 12 to air throughput 4.
  • An air throughput 4 is thus predefined with sufficient accuracy over a predefined rotational speed 12.
  • An ionization current setpoint value is set via the characteristic curve 16.
  • the amount of fuel 6 is thus regulated via a closed control loop in such a way that the measured ionization current 14 is equal to the predetermined setpoint value from the characteristic curve 16. So the amount of air is assigned to the amount of fuel within the specified tolerances.
  • the characteristic curve 16 of the ionization current setpoint 15 shown over the measured fan speed 12 results in a dependency of the fuel throughput 6 over the speed 12 via the closed control loop .
  • the fuel throughput 6 is represented by the fuel valve control 13, since the control 13 and the fuel throughput 6 can be clearly assigned to one another in a reversible manner. This applies at least as long as the amount of air is kept constant.
  • the fuel throughput 6 could be determined directly, for example by a flow measuring device.
  • the dependence of the fuel actuator control 13 as a measure for the fuel throughput 6 on the fan speed 12 as a measure for the air throughput 4 is shown in FIG FIG 3 recorded. Since the characteristic curve depends on external conditions such as fuel and / or fuel inlet pressure in addition to the valve characteristics, two characteristic curves 17 and 18 are initially stored in the burner control 10. The two characteristics 17 and 18 correspond to fixed but different external conditions.
  • the characteristic curve 17 was determined, for example, with a low-calorific fuel and / or a low fuel inlet pressure.
  • the currently valid characteristic curve 19 is determined from the current, stationary fuel position 13 determined by the control device 10 when the target value 15 and the actual value 14 of the ionization current are equal. All other points of the characteristic curve 19 are then determined from this point and the two characteristic curves 17 and 18 as a (geometric and / or arithmetic) mean value weighted with a factor R.
  • R can be determined from the position point 13 of the fuel valve at a given speed 12 and the two points lying on the characteristic curves 17 and 18 at the same speed 12. In other words: at each speed 12 the ratio of the distance between the characteristic curves 19 and 17 to the distance between the characteristic curves 19 and 18 is the same. With this measure, the performance can be changed quickly. So you are already very close to the target point without the control device 10 having to intervene strongly when changing the output.
  • the weighting factor R is averaged in two ways.
  • the weighting factor R is averaged over a period of, for example, 10 seconds, 15 seconds or 20 seconds.
  • the weighting factor R is averaged over a longer period of time, for example 30 seconds, 45 seconds or 60 seconds.
  • the averaging allows fluctuations in the system to be dampened even better. For example, sliding average filters and / or low-pass filters are used as averaging.
  • a possible threshold value for the normalized difference is, for example, a value of 5 percent of the lower value, or of 20 percent of the lower value, or even of 100 percent of the lower value.
  • a separate test sequence must then be used to check whether there is actually a cover and / or a blockage.
  • the special test is necessary because other causes for a change in the weighting factor R also come into question, in particular a change in the fuel and / or the fuel inlet pressure.
  • the test procedure for coverage is through FIG 4 made clear.
  • the ionization current setpoint value 15 is shown there over the air ratio ⁇ 20.
  • the measured ionization current 14 is then regulated to be equal to the nominal value 15 via the closed ionization control circuit.
  • the setpoint 15 for this speed is identical to the setpoint current 22.
  • the desired ⁇ value 23 for the current speed value 12 is obtained via the characteristic curve 21.
  • rotational speed measured values 12 are compared with one another at regular intervals.
  • a steady state also prevails here when the last measured rotational speed 12 deviates by less than 1 percent, less than 10 percent, or more by less than 50 percent from the rotational speed value 12 measured before.
  • Typical regular intervals for comparison are speed values 12 of at least 2 seconds, at least 10 seconds or at least 20 seconds.
  • the ionization current setpoint 15 is increased to a value 24 with the control loop closed.
  • the increase in the ionization current setpoint value with a closed control loop to a value 24 is, for example, an increase of 5 percent, 20 percent or 100 percent measured on the previously regulated ionization current setpoint value.
  • the speed 12 is kept constant. Has become like in FIG 4 If the characteristic curve 21 is not changed because there is no cover, the actual value 14 is also regulated to the setpoint value 24 after a short time. For example, the short time is 3 seconds or 10 seconds or 20 seconds. According to characteristic curve 21, the ⁇ value 25 results. The ionization current control circuit delivers a stable result. How to get in FIG 4 sees, value 23 for this case is still sufficiently far away from the critical ⁇ range 26 in which CO emissions occur.
  • the critical ⁇ range includes, for example, air coefficients ⁇ less than 1.15, in particular less than 1.10, less than 1.05 or even less than 1.00.
  • the setpoint is set to the operating value 22 again.
  • the freezing of speed 12 is lifted.
  • the short waiting time until the control loop settles is, for example, 1 second or 5 seconds or 10 seconds.
  • the speed specification and thus the power setting can again be made by higher-level units, for example a temperature control.
  • test can be carried out at short intervals of, for example, more than a minute. The further tests continue until a specified number of tests, for example 5 tests or 10 tests or 15 tests, have been passed. Furthermore, a test can also be requested and / or carried out after a change in performance, that is to say after burner modulation, and / or after a burner start.
  • test request can be requested after a speed change by a certain value if the speed 12 is sufficiently stable in one state.
  • a test can also be requested cyclically at certain specified time intervals.
  • a test request is made cyclically and / or after speed changes after predetermined time intervals. The possibilities mentioned are available if, for example, another control algorithm without a weighting factor is used.
  • the characteristic curve 16 again results from FIG 2 the same ionization current setpoint value 22. Due to the changed course of the characteristic curve 27 compared to characteristic curve 21, the resulting ⁇ value 28 for the operating case shifts to a lower value compared to the value 23. If the test sequence described above is carried out, when the ionization current is increased -Setpoint 15 with the control loop closed to the value 24 on the characteristic curve 27, a point can just be found. That point allows a stable adjustment of the ionization current control circuit to value 24. For the test case, a ⁇ value 29 results, at which CO emissions are already generated.
  • the state with CO emissions lasts preferably less than 15 seconds, particularly preferably less than 10 seconds, more preferably less than 5 seconds.
  • FIG 6 the behavior of the test sequence is shown if there is a cover and / or blockage that generates critical combustion values.
  • the value 22 of the ionization current setpoint is again determined by characteristic curve 16.
  • a ⁇ value 31 results for the operating case.
  • the ⁇ value 31 is already in the critical combustion range with excessively high CO emissions.
  • the ionization current control circuit searches for a corresponding value by reducing ⁇ by increasing the amount of fuel, in particular the amount of gas, continuously.
  • the control loop breaks open. Due to the decrease in the ionization current with the air ratio ⁇ 20 in characteristic curve 30 for ⁇ ⁇ 1, the effect is even stronger.
  • the fuel valve 5 comes to its maximum possible open position. It hits the stop or the flame breaks out beforehand.
  • the control circuit outputs a signal to a fuel valve, taking into account a setpoint value for the ionization current. If the control circuit fails, the ionization current control circuit will no longer find a suitable air ratio ⁇ and no suitable stationary position of the fuel valve for a given ionization current setpoint value. As a result, there is at least one target value for the ionization current in the critical combustion area, for which a stationary mathematical transfer function does not remain finite.
  • the mathematical transfer function describes the output of the control loop to the fuel valve as a response to a finite measured value of the ionization current. In particular, the mathematical transfer function describes the output of the control loop without considering technical limits for the output signal of an electrical control loop.
  • Stationary control of a combustion by the burner system means that with constant (changes in) input variables (into) the transfer function, after a finite time and after transient processes have subsided, there is no longer any change in the output variable to the fuel actuator.
  • input variables are, for example, the ionization current setpoint value and / or external interference.
  • all system variables are at a fixed, unchanged value. This applies in particular to the output variable of the control loop to the fuel valve. This also applies accordingly to the control signal 13 to the fuel valve 5.
  • the transfer function is the transfer function of the closed control loop including the transfer function of the controlled and measuring path (as sub-functions).
  • the measured variable ionization current actual value, but also the valve control on the controlled system, are internal system variables for the transfer function of the control loop.
  • Further control loop functions are the setpoint / actual value comparison and the controller as well as any drivers for valve control.
  • the control loop is, for example, a proportional / integral control loop and / or a proportional / integral / derivative control loop.
  • the breaking of the control loop is detected when the control signal 13 has exceeded the value for the maximum possible opening position of the fuel valve 5. In some cases, the maximum possible control 13 of the fuel valve is limited and / or the stroke of the maximum opening of the fuel valve 5 is measured. A break in the control loop is then detected when a predetermined period of time is exceeded in which the fuel valve 5 is in its maximum position.
  • a third possibility of detecting a broken control loop consists in detecting the exceeding of a period of time in which the actual ionization current signal 14 is also present during the test phase increased ionization current setpoint 24 is located outside a band around the ionization current setpoint 24 defined in the regulating, control and / or monitoring unit 10. According to a further possibility for detecting the breaking of the control loop, the loss of the flame during the test is to be assessed as breaking of the control loop.
  • the difference between the ionization current setpoint value in the operating case 22 and the ionization current setpoint value in the test case 24 determines the point on the basis of which the critical area 26 is defined. This difference determines the maximum CO value without a safety shutdown, including a possible safety distance. In a particularly preferred embodiment, only one difference is defined for all speed values 12 in the regulating, control and / or monitoring unit 10. Then the difference is to be selected such that of all possible fan speeds 12, the highest value has to be selected for a cover with an associated change in curve 21.
  • the fan speeds 12 correspond to all possible burner outputs with associated critical areas 26.
  • Another possible embodiment is to choose a difference for several significant speeds. For the speeds, these significant speeds are interpolated on the basis of the different difference values. Linear interpolation is preferred. According to a further embodiment, so-called cubic splines are used for interpolation.
  • the significant speed values advantageously contain the maximum and the minimum degree of modulation of the system. Those skilled in the art will recognize that the significant speed values are not limited to the maximum and minimum degrees of modulation.
  • the system can continue to operate with or without a safety shutdown, in which case several tests are repeated shortly after the failed test. Only after a predetermined number of tests that have not been passed and / or after a given relative frequency of tests that have not been passed does a malfunction occur.
  • This procedure has the advantage that brief covers and / or very strong influences that simulate a cover of the supply air / exhaust system 8 do not disable the system. This guarantees high availability. For example, strong winds come into consideration as short-term covers and / or very strong influences.
  • reaction is to shift the ionization current setpoint value 14 by a predetermined increment until the test, which is repeated at short intervals, is passed with a positive result.
  • the increased availability is offset by a period of operation during the test sequence during which the device can generate critical emissions.
  • This reaction is therefore less preferred for covers and / or blockages that can potentially run off quickly. In this case a very large one should be preferred (clear) correction can be chosen.
  • the characteristic curve 16 can also be corrected precisely by means of other known drift corrections at the corresponding speed points.
  • the test sequence described can also be used to reveal other errors that affect the burner electrode system 1, 7.
  • a drift of the ionization electrode 7 due to deposits and / or bending can also be uncovered.
  • a correction of the ionization current setpoint value 14 is rather difficult and / or imprecise to carry out.
  • the method has the advantage of immediately detecting a rapid change in characteristic curve 21.
  • the method also has the advantage that, as a result of the discovery of a rapid change, it is possible to react immediately. The various procedures therefore complement each other.
  • the test is representative of a specific speed band of speed 12. Such a validity band is typically ⁇ 300 revolutions per minute, ⁇ 400 revolutions per minute or ⁇ 800 revolutions per minute depending on the type of blower. As soon as a test is requested, a further test must therefore be carried out after each adjustment of the output (modulation) via the fan speed 12, which is greater than the specified range. In the same way, a new test is requested after each commissioning. Tests are carried out after changing the speed 12 (power adjustment) and / or after each start-up until a specified number of tests is passed. According to a special embodiment, tests are carried out until a predetermined percentage of tests is passed. Preferably at least 50 percent, more preferably at least 80 percent, particularly preferably at least 95 percent of the tests are passed.
  • the bands 32 are therefore beneficial when a test has been requested and passed. It can thus be ensured that subsequent tests are really only carried out at a different speed 12 from a different belt 32.
  • the test sequence is ended when the tests were successful at speeds 12 that are sufficiently far apart.
  • Typical bandwidths are typically ⁇ 300 revolutions per minute, ⁇ 400 revolutions per minute or ⁇ 800 revolutions per minute depending on the type of blower.
  • the person skilled in the art recognizes that the bands 32 can also overlap, so that a test can be assigned to two bands 32. You could instead Set fewer bands and a higher bandwidth for them. This measure can reduce the number of tests. The distance between the speeds 12 for subsequent tests is thus increased.
  • the drift of a burner electrode system due to deposits and / or bending of the ionization electrode must be determined at regular time intervals at certain speed points.
  • the specified speed point must be reached.
  • the heat must be dissipated there for a short time.
  • Such tests are difficult to carry out due to the effects of wind, particularly at very low speeds and correspondingly low burner outputs. If the drift test points at higher speeds cannot be reached because the heat cannot be dissipated, the system must shut down before the drift test point is reached. The drift test can therefore not be carried out.
  • a test disclosed here is requested and carried out when the predefined period of time for a drift correction has expired and a drift correction could not be carried out.
  • All speed bands 32 are initially marked as not tested. The test is then carried out in band 32, in which the speed 12 is currently sufficiently stationary. This band 32 is marked as tested if the test is successful. When another belt 32 is reached at a sufficiently steady rotational speed 12, a test is then carried out in this other belt 32. This other band 32 is also marked as tested in the event of a successful test sequence. In all bands 32 that are marked as tested, no further test is carried out when the speed 12 reaches one of those bands 32 again. The test is performed on bands 32 marked as not tested. The respective speed range 32 is then marked as tested after the test has been carried out successfully.
  • a safety shutdown with a fault position only takes place if a test fails, i.e. a critical state has occurred and / or threatens to occur.
  • the respective speed range 32 can remain marked as not tested in this case. The tests can be repeated several times until a fault is generated after a number of failed tests. This further improves availability.
  • a malfunction occurs if no test was carried out at all during the specified time, that is to say no steady state is reached, even for a short time.
  • a safety shutdown with a fault position is also recommended, as the burner output is unstable over a longer period of time.
  • the above measure can significantly increase the availability of the burner system.
  • an increase in availability in the case of drift tests that cannot be carried out and a detection of spontaneous coverage and / or spontaneous blocking can be combined with one another.
  • the neural network has a number of input neurons, which together form the input layer.
  • the input neurons are set with input data such as fuel valve position 13, ionization flow 14, fan speed 12.
  • the input data are preferably normalized before the input neurons are set.
  • provision is made for the input data x to be normalized in each case using a Gaussian method, taking into account the mean value ⁇ and standard deviation ⁇ of the respective input data. This results in a normalized value x norm according to: x standard x - ⁇ ⁇
  • the neural network also has at least one output neuron.
  • the totality of the output neurons forms the output layer.
  • the at least one output neuron outputs a number between 0 and 1 or between 0% and 100%, which indicates the degree of coverage and / or blocking.
  • the output neuron of the special embodiment can be implemented, for example, on the basis of a sigmoid or a hyperbolic tangent (tanh) activation function.
  • the at least one output neuron outputs a number such as 0 or 1, which in the case of 0 indicates that there is no coverage and / or blocking. In the case of an output of 1, however, there is a cover and / or blockage.
  • the output neuron the simplified embodiment can be implemented using a step function, for example.
  • the neural network has at least two output neurons.
  • a first output neuron corresponds to the special embodiment from above, that is to say a degree of coverage is output.
  • a second output neuron corresponds to the aforementioned simplified embodiment. So it outputs 0 or 1 corresponding to no cover or an existing cover.
  • the neural network also has at least one hidden layer of neurons.
  • the at least one hidden layer of neurons preferably has 7, 8 or 9 neurons.
  • the at least one hidden layer of neurons has 3, 4 or 5 neurons.
  • the neurons of the hidden layer are typically perceptron neurons, which work according to a sigmoid or a hyperbolic tangent (tanh) activation function.
  • each neuron of the at least one hidden layer is connected to each neuron of the input layer.
  • each neuron of the at least one hidden layer is ideally connected to each neuron of the output layer.
  • each neuron can have a distortion connection and / or a distortion parameter, which helps determine the activation function of the respective neuron.
  • the connections of the neural network have weightings which are determined by learning the neural network.
  • the neural network is learned via error feedback.
  • a set of input and output values determined under test conditions is used for this purpose.
  • an error function is defined.
  • the error function is then minimized using a procedure such as error feedback under the given input and output values.
  • an evolutionary algorithm for example a genetic algorithm, is used to minimize the error function.
  • the learning methods can be combined with one another to minimize the error function.
  • a genetic algorithm can be used to determine a set of weightings which is close to the global minimum.
  • the global minimum of the error function is then determined via error feedback and / or via a gradient descent method.
  • the combined use of learning methods has the advantage that a global minimum and not just a local minimum of the error function is determined with a greater probability.
  • the neural network can be learned in such a way that covers and / or blockages are detected with a high degree of probability. At the same time, in this case there is the possibility of a false report of a cover and / or blockage.
  • the neural network can choose a Error function can be learned in such a way that uninterrupted operation is guaranteed as far as possible. In that case, a cover and / or blockage may not be recognized. In this case, it is also possible that a cover and / or blockage is only recognized when it has progressed well.
  • the neural network disclosed here can also be used to detect the drift of an ionization electrode and / or other states of a burner system.
  • the neural network can be implemented in practice on the control device 10 by storing the structure of the network in the control device 10.
  • the structure of the network includes, for example, the number and type of neurons per layer and the connections between the neurons.
  • an optimal set of weightings for the connections is stored.
  • the control device loads the evaluation of an existing situation of the neural network according to the stored structure.
  • the weightings of the connections are set according to the stored sentence.
  • the input parameters such as fuel supply 13, fan speed 12 and signal from ionization electrode 14 are then normalized, if necessary, and set as input values.
  • By activating the neural network it generates one or more output values which indicate coverage and / or blockage and / or the degree thereof.
  • the output value or values are handled as before. For example, locks and / or error messages can be triggered by the output values.
  • a coverage and / or blocking is output by the neural network, a previously described test is carried out by the control device 10 for stationary operation.
  • RAM working memory
  • MRAM magnetic working memory
  • ROM read-only memory
  • EPROM electronically programmable ROM
  • EEPROM electronically programmable and erasable ROM
  • registers of a computing unit a Hard disk, removable storage device, optical memory, or any suitable medium that can be accessed by a computer or by other IT devices and applications.
  • the present disclosure teaches a control device for controlling combustion by a burner system as a function of an ionization current setpoint value, the burner system comprising a flame area (2) and at least one ionization electrode (7) arranged in the flame area (2) of the burner system and a Air actuator (3) which is designed to influence a supply amount of air as a function of an air control signal (11), and a fuel actuator (5) which is designed to influence a supply amount of fuel as a function of a fuel -To influence the control signal (13); wherein the control device (10) is designed to receive signals (14) from the at least one ionization electrode (7) and to process them into actual values of an ionization current; wherein the control device (10) is designed to generate a first air control signal (11) and to output it to the air control element (3) and a fuel control signal (13) by regulating the actual values of the ionization current to the ionization current setpoint to generate and output to the fuel actuator (5); and to generate a setpoint (24) increased by
  • the regulating device (10) is preferably designed to generate a fuel control signal (13) by regulating the actual values of the ionization current to the increased setpoint value, the regulation comprising a Comparing the actual values of the ionization current with the increased nominal value, generating an error signal from the comparison and generating a fuel control signal (13) from the error signal. It is particularly preferred that the generated, changed fuel control signal (13) is also output to the fuel control element (5).
  • the air control element (3) is preferably designed to influence the amount of air supplied to the flame area (2) as a function of an air control signal (11).
  • the fuel control element (5) is preferably designed to influence the amount of fuel supplied to the flame area (2) as a function of a fuel control signal (13).
  • the increased setpoint (24) is preferably an increased one Ionization current setpoint (24).
  • the predetermined amount is preferably stored in (a memory) of the control device.
  • the first air control signal (11) is preferably constant over time.
  • the first air control signal (11) is preferably not influenced by the regulation of the increased setpoint value (24).
  • the air control element (3) is preferably designed to influence the supply of air as a function of air control signals (11) and to report an air volume signal (12) to the control device (10).
  • the transient processes preferably subside within a maximum of 5 seconds, a maximum of 15 seconds, a maximum of 60 seconds or a maximum of 5 minutes.
  • the transient process has subsided when the oscillating part of the amplitudes of the output variables, in particular of the fuel control signal (13), has decreased to the 1 / e-th part, e ⁇ 2.7173, or to an even lower part such as less than 10% or has even decreased by 1%.
  • a person skilled in the art recognizes that regulation to an increased setpoint value (24) is also possible with regulation of the air supply (11), the fuel supply remaining constant. Subsequently, based on the air control signal (11), it is determined by evaluation whether the control regulates in a range for a stationary regulation of the combustion by the burner system.
  • the control device (10) is preferably designed to generate a modified fuel control signal (13) for the first air control signal (11) by regulating the actual values of the ionization current to the increased setpoint value (24), the control comprising a comparison the actual values of the ionization current with the increased nominal value (24), the generation of an error signal from the comparison and the generation of a modified fuel control signal (13) from the error signal.
  • the predetermined amount is preferably at least 5 percent, at least 20 percent or even at least 100 percent of the ionization current setpoint.
  • the present disclosure also teaches one of the aforementioned control devices, the control device (10) being designed to evaluate the air control signal (11) and / or the actual values of the ionization current (14) and to check for the presence of a steady state, with a steady state is present when the air control signal (11) and / or the actual values of the ionization current (14) fluctuate within predetermined bands.
  • the present disclosure also teaches one of the aforementioned regulating devices, the air actuator (3) being designed to influence supply quantities of air as a function of air actuating signals (11) and to supply an air quantity signal (12) to the regulating device (10) report, and wherein the control device (10) is designed to evaluate the air control signal (11) and / or the reported air volume signal (12) and / or the actual values of the ionization current (14) and for the presence of a steady state to check, whereby a steady state is present when the air control signal (11) and / or the reported air volume signal (12) and / or the actual values of the ionization current (14) fluctuate within predetermined bands.
  • the air control signals (11) generated and the actual values of the ionization current preferably fluctuate within specified bands by deviations of at most ⁇ 1 percent, at most ⁇ 10 percent or even at most ⁇ 50 percent around the respective mean values.
  • arithmetic or geometric mean values come into consideration as mean values.
  • the mean values can be adaptively formed.
  • the control device (10) comprises an (adaptive) low-pass filter that creates mean values.
  • the mean values are averaged over at least 2 seconds, at least 10 seconds or at least 20 seconds, for example.
  • the distances between the respective maximum and minimum values from the mean are provided as a measure of the deviations.
  • the standard deviation from the mean and its multiples as well as the variance come into consideration as deviations.
  • the air setting signals (11) and / or speed signals (12) generated are compared with one another at regular intervals.
  • a steady state also prevails here if the air control signal (11) and / or speed signal (12) generated last by less than 1 percent, less than 10 percent, or further by less than 50 percent of the previously used air control signal (11) and / or speed signal (12) deviates.
  • Typical regular intervals for the comparison of the air control signals (11) and / or speed signals (12) are at least 2 seconds, at least 10 seconds or at least 20 seconds.
  • the processing of the signals (14) from the at least one ionization electrode (7) into actual values of the ionization current preferably includes processing in an analog-digital converter.
  • the control device (10) preferably comprises the analog-to-digital converter. The person skilled in the art selects an analog-to-digital converter with a suitable resolution and speed.
  • the present disclosure also teaches one of the aforementioned control devices, the control device (10) being designed as a function of a signal (14) of the at least one ionization electrode (7) processed to an actual value of the ionization current and as a function of the ionization current setpoint to generate a stationary fuel control signal (13), which enables a steady-state control of combustion by the burner system within a control range for a stationary control, and to output the stationary fuel control signal (13) generated in this way to the fuel actuator (5).
  • the control device (10) being designed as a function of a signal (14) of the at least one ionization electrode (7) processed to an actual value of the ionization current and as a function of the ionization current setpoint to generate a stationary fuel control signal (13), which enables a steady-state control of combustion by the burner system within a control range for a stationary control, and to output the stationary fuel control signal (13) generated in this way to the fuel actuator (5).
  • the present disclosure also teaches one of the aforementioned control devices, the control device (10) being designed to determine, based on the evaluation, that the control device (10) using the increased setpoint (24) is outside the control range for a steady-state control of the combustion by the The burner system regulates if the fuel control signal (13) generated on the basis of the increased setpoint value (24) exceeds a predetermined maximum value.
  • the present disclosure also teaches one of the aforementioned control devices, the control device (10) being designed to determine, based on the evaluation, that the control device (10) using the increased setpoint (24) is outside the control range for a steady-state control of the combustion by the The burner system regulates if the fuel control signal (13) generated on the basis of the increased setpoint value (24) exceeds a predetermined maximum value during a predetermined period of time.
  • the specified maximum value is preferably stored as a value (adapted to the burner system) in the control device (10).
  • the predefined period of time is preferably stored as a value (adapted to the burner system) in the control device (10). According to a special embodiment, the predefined period of time is less than 1 second, less than 10 seconds or less than 60 seconds.
  • the present disclosure also teaches one of the aforementioned regulating devices, the predetermined maximum value corresponding to a maximum opening position of the fuel actuator (5).
  • the maximum open position of the fuel actuator (5) is preferably stored (as a value) in (a memory) of the control direction.
  • the fuel actuator (5) is adjustable and / or in the maximum open position of the fuel actuator (5) the throughput (6) of fuel cannot be increased by adjusting the fuel actuator (5).
  • the present disclosure also teaches one of the aforementioned control devices, the control device (10) being designed as a function of a signal (14) of the at least one ionization electrode (7) processed to an actual value of the ionization current and as a function of the ionization current setpoint to generate a stationary fuel control signal (13) which, within a control range for a stationary control, makes it possible to regulate a combustion by the burner system in a stationary manner, and to store the stationary fuel control signal (13) generated in this way, wherein the control device (10) is designed to form a difference between the fuel control signal (13) generated on the basis of the increased setpoint and the stored stationary fuel control signal (13).
  • the present disclosure also teaches one of the aforementioned control devices, the control device (10) being designed to determine, by evaluating the fuel control signal (13) generated on the basis of the increased setpoint, that the control device (10) using the increased setpoint (24) regulates outside a control range for a stationary control of a combustion by the burner system if the difference formed exceeds a predetermined threshold value.
  • the present disclosure also teaches one of the aforementioned regulating devices, wherein the regulating device (10) is designed to generate a value as a function of a difference which is determined from the on the basis of the increased setpoint generated fuel control signal (13) and the stored stationary fuel control signal (13) was generated, wherein the control device (10) is designed to determine, by evaluating the fuel control signal (13) generated on the basis of the increased setpoint, that the control device (10) using the increased setpoint (24) is outside a control range for stationary control of a combustion the burner system regulates if the value generated as a function of the difference exceeds a predetermined threshold value.
  • the entire predetermined time period is less than 1 second, less than 10 seconds or less than 60 seconds.
  • the above-mentioned function is the identity function or the amount function.
  • the function is a time derivative.
  • the function is a quotient of the difference and time or a quotient of the amount of the difference and time.
  • the time span between two actual values of the ionization current that are processed immediately one after the other can be considered as the time.
  • the time span between two signals (14) of the ionization electrode (7) received immediately one after the other comes into consideration, for example.
  • the present disclosure further teaches one of the aforementioned control devices, wherein the control device (10) has a communication interface for sending error messages and is designed to generate an error message if it is determined on the basis of the evaluation that the control device (10) is using the increased Regulates setpoint (24) outside of a control range for stationary control of combustion by the burner system, wherein the control device (10) is designed to send the generated error message using the communication interface.
  • the communication interface is a wireless interface and / or an interface of a CAN bus according to ISO 11898-1: 2015.
  • the interface is preferably compatible with a protocol, preferably a protocol of a CAN bus according to ISO 11898-1: 2015.
  • the error message is preferably sent using the protocol.
  • the error message is sent using the communication interface, for example, to a user interface such as a graphical user interface.
  • the error message can still be sent using the communication interface, for example, to a further unit such as a further control device (10) and / or a mobile terminal.
  • the present disclosure further teaches one of the aforementioned control devices, wherein the control device (10) is designed to generate a switching-off fuel control signal (13) for reducing the supply amount of fuel to zero and to output it to the fuel control element (5), if based it is determined on the evaluation that the control device (10), using the increased setpoint (24), controls outside a control range for stationary control of a combustion by the burner system.
  • the fuel actuator (5) can be locked.
  • the output of the switching-off fuel control signal (13) to the fuel actuator (5) causes the Fuel actuator (5).
  • no fuel (6) can flow through the fuel actuator (5).
  • the burner system is in a safe state without combustion while it is locked.
  • the burner system and / or the fuel actuator (5) can go into the fault position.
  • the above-mentioned output of the switching-off fuel control signal (13) takes place to the burner system, in particular to the fuel control element (5). It causes a malfunction of the burner system and / or the fuel actuator (5).
  • the fuel actuator (5) is permanently locked. The disrupted position and thus the permanent locking can (exclusively) be canceled by manual intervention, in particular manual input.
  • a special embodiment includes essentially simultaneously within less than 2 seconds, preferably within less than 0.2 seconds, more preferably within less than 0.05 seconds.
  • the generated and stored air control signal (11) enables a stationary regulation of the combustion by the burner system.
  • the control device (10) is preferably designed to calculate a characteristic value (19) from each of the pairs generated as a function of the fuel control signal (13), stored characteristic values (17, 18) and the air control signal (11) so that a calculated characteristic curve value (19) is available for each pair created.
  • the control device (10) is preferably designed to generate a characteristic curve value (19) from each of the pairs generated as the quotient of the difference between the fuel control signal (13) and a value of a characteristic curve (17) determined with the aid of the air control signal (11) ) or (18) and the difference between values of the two characteristic curves (17) and (18) determined with the aid of the air control signal (11), so that a calculated characteristic curve value (19) is available for each pair generated.
  • the control device preferably comprises one or more low-pass filters for performing the averaging on the first and / or the second mean value.
  • the first and / or the second mean value are preferably geometric and / or arithmetic mean values.
  • the threshold value for a (normalized) difference between the two mean values is preferably 5 percent, 20 percent or even 100 percent.
  • the threshold value is preferably stored in the control device (10) as a value (matched to the burner system).
  • the first time constant is 10, 15 or 20 seconds.
  • the second time constant is preferably different from the first time constant and is 30, 45 or 60 seconds.
  • the second air control signal (11) is preferably constant over time.
  • the second air control signal (11) is preferably not influenced by the regulation of the increased setpoint (24).
  • the second air control signal (11) is equal to the first air control signal (11).
  • the present disclosure also teaches one of the aforementioned control devices, the control device (10) dividing the adjustable speed range of the speed (12) into individual speed bands (32), and a test for stationary control with increased ionization current setpoint at a speed within a speed band (32) provides a representative result for all other speeds (12) with regard to whether the current air ratio in operation ⁇ (20) is within or outside of a ⁇ range (26).
  • control device (10) being designed to regulate the actual values of the ionization current again in the case of air control signals (11) within a speed range (32) for which the settable register value is set to prevent the increased setpoint (24).
  • the ⁇ range (26) is preferably defined in that increased or critical emissions occur during operation within the ⁇ range (26).
  • the present disclosure further teaches one of the aforementioned control devices, wherein the register values that can be set for each of the at least two speed bands (32) can be deleted and the control device (10) is designed to delete all of the register values that can be set for each of the at least two speed bands (32).
  • the present disclosure also teaches the aforementioned control device with the speed range of the speed (12) subdivided into markable speed bands (32), the control device being designed to cancel and / or reverse the markings for each speed band (32) after a predetermined period of time / or reset.
  • the control device is designed, as a result of the canceled and / or undone and / or reset markings for each speed band (32) within each speed band (32) with canceled and / or canceled and / or reset marking, a test for steady-state behavior with increased ionization current Setpoint to be carried out.
  • Typical values for the specified time span are 10 hours or 30 hours or 100 hours.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Combustion (AREA)
  • Regulation And Control Of Combustion (AREA)
EP18159377.3A 2017-03-27 2018-03-01 Erkennung einer blockierung Active EP3382277B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL18159377T PL3382277T3 (pl) 2017-03-27 2018-03-01 Rozpoznawanie zablokowania

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17163123 2017-03-27

Publications (2)

Publication Number Publication Date
EP3382277A1 EP3382277A1 (de) 2018-10-03
EP3382277B1 true EP3382277B1 (de) 2021-09-29

Family

ID=58428207

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18159377.3A Active EP3382277B1 (de) 2017-03-27 2018-03-01 Erkennung einer blockierung

Country Status (5)

Country Link
US (1) US11231174B2 (pl)
EP (1) EP3382277B1 (pl)
ES (1) ES2902010T3 (pl)
HU (1) HUE057172T2 (pl)
PL (1) PL3382277T3 (pl)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101601709B1 (ko) * 2014-04-22 2016-03-10 주식회사 경동나비엔 가스 보일러의 배기 연도 폐쇄 감지 방법
US11428407B2 (en) * 2018-09-26 2022-08-30 Cowles Operating Company Combustion air proving apparatus with burner cut-off capability and method of performing the same
DE102019208786A1 (de) * 2019-06-17 2020-12-17 Robert Bosch Gmbh Verfahren zur Fehlerdetektion in einer Fluidführungsvorrichtung
EP4119847B1 (de) * 2021-07-16 2023-06-14 Siemens Aktiengesellschaft Verbrennungsvorrichtung mit regelungseinrichtung
JP7697877B2 (ja) * 2021-12-07 2025-06-24 リンナイ株式会社 送風装置
EP4617566A1 (de) * 2024-03-11 2025-09-17 Siemens Aktiengesellschaft Optimierte regelung einer verbrennungsvorrichtung

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4703306A (en) * 1986-09-26 1987-10-27 The Maytag Company Appliance system
GB9400289D0 (en) * 1994-01-08 1994-03-09 Carver & Co Eng Burner control apparatus
US5632614A (en) * 1995-07-07 1997-05-27 Atwood Industries , Inc. Gas fired appliance igntion and combustion monitoring system
EP0770824B1 (de) 1995-10-25 2000-01-26 STIEBEL ELTRON GmbH & Co. KG Verfahren und Schaltung zur Regelung eines Gasbrenners
ES2158400T3 (es) * 1996-05-09 2001-09-01 Stiebel Eltron Gmbh & Co Kg Procedimiento para el funcionamiento de un quemador de gas.
DE10023273A1 (de) 2000-05-12 2001-11-15 Siemens Building Tech Ag Messeinrichtung für eine Flamme
ES2253314T3 (es) 2001-09-13 2006-06-01 Siemens Schweiz Ag Instalacion de regulacion para un quemador y procedimmiento de regulacion.
US7255285B2 (en) * 2003-10-31 2007-08-14 Honeywell International Inc. Blocked flue detection methods and systems
EP1701096A1 (de) * 2005-03-10 2006-09-13 Vaillant GmbH Verfahren zur Anpassung der Geräteheizleistung eines gebläseunterstützten Heizgerätes an die individuellen Druckverluste eines Frischluft-Abgas-Leitungssystems
ITMO20050204A1 (it) * 2005-08-02 2007-02-03 Merloni Termosanitari Spa Metodo di controllo della combustione a ricerca guidata del set point
ES2441226T3 (es) 2010-12-16 2014-02-03 Siemens Aktiengesellschaft Dispositivo de regulación para una instalación de quemador
KR101601709B1 (ko) * 2014-04-22 2016-03-10 주식회사 경동나비엔 가스 보일러의 배기 연도 폐쇄 감지 방법
PL3045816T3 (pl) 2015-01-19 2019-07-31 Siemens Aktiengesellschaft Urządzenie do regulacji instalacji palnikowej

Also Published As

Publication number Publication date
ES2902010T3 (es) 2022-03-24
US11231174B2 (en) 2022-01-25
HUE057172T2 (hu) 2022-04-28
PL3382277T3 (pl) 2022-03-07
EP3382277A1 (de) 2018-10-03
US20180274782A1 (en) 2018-09-27

Similar Documents

Publication Publication Date Title
EP3382277A1 (de) Erkennung einer abdeckung
EP2466204B1 (de) Regeleinrichtung für eine Brenneranlage
EP2549187B1 (de) Verfahren und Vorrichtung zur Luftzahlregelung eines Brenners
EP3301362A1 (de) Regelung turbulenter strömungen
EP1522790B1 (de) Verfahren zur Regelung eines Gasbrenners, insbesondere bei Heizungsanlagen mit Gebläse
DE102007009689B4 (de) Verfahren zum Betreiben einer Brennkraftmaschine mit Abgasrückführung
EP3299718B1 (de) Gasartenerkennung
EP3084156A1 (de) Verfahren und steuereinrichtung zum überwachen eines kurbelgehäusedrucks
EP0209771A1 (de) Verfahren und Anordnung zur Feinregulierung des Brennstoffmengenstromes an brennerbetriebenen Feuerungsanlagen durch Messung des Restsauerstoffes und des Kohlenmonoxidgehaltes in den Abgasen
EP3045816A1 (de) Einrichtung zur Regelung einer Brenneranlage
DE102008020651B3 (de) Ansteuerschaltung für einen elektrochemischen Gassensor und Verfahren zum Einstellen eines elektrochemischen Gassensors
EP0339135A1 (de) Verbundsteuereinrichtung für einen Brenner
EP4194749B1 (de) Steuerung und/oder regelung einer verbrennungsvorrichtung und verbrennungsvorrichtung
DE102013216024B4 (de) Verfahren zur Lambda-Regelung einer Verbrennungskraftmaschine und Regelvorrichtung
EP1971804B1 (de) Verfahren zum betreiben einer feuerungsanlage
DE102018104926B4 (de) Verfahren zum Betrieb und Einrichtung zur Steuerung und/oder Regelung einer Brennkraftmaschine sowie Brennkraftmaschine
EP0877974A1 (de) Verfahren zur regelung einer regelstrecke, insbesondere einer brennkraftmaschine
EP3290801B1 (de) Verfahren zur kontrolle eines brennstoff-luft-verhältnisses in einem heizsystem sowie eine steuereinheit und ein heizsystem
EP2683928A1 (de) Verfahren zur regelung eines verbrennungsmotors
EP4045851B1 (de) Verfahren zur steuerung einer verbrennungseinrichtung
DE102025106311B3 (de) Verfahren zur Regelung eines Verbrennungsluftverhältnisses einer Brennkraftmaschine sowie Steuergerät
DE102007021414B4 (de) Verfahren zur Einstellung der Füllung einer Verbrennungskraftmaschine
DE102007062173A1 (de) Verfahren zum Betreiben einer Brennkraftmaschine und Steuer- oder Regelrichtung für eine Brennkraftmaschine
EP1432904B1 (de) Verfahren und vorrichtung zur steuerung einer brennkraftmaschine
EP0644376B1 (de) Verfahren und Vorrichtung zur Regelung eines Brenners

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20190305

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20210525

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: AT

Ref legal event code: REF

Ref document number: 1434525

Country of ref document: AT

Kind code of ref document: T

Effective date: 20211015

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502018007218

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: FI

Ref legal event code: FGE

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

REG Reference to a national code

Ref country code: NL

Ref legal event code: FP

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210929

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210929

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211229

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211229

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210929

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210929

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211230

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2902010

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20220324

REG Reference to a national code

Ref country code: HU

Ref legal event code: AG4A

Ref document number: E057172

Country of ref document: HU

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220129

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210929

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210929

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220131

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210929

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210929

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210929

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502018007218

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210929

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20220630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210929

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210929

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20220331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220301

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220331

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220301

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210929

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210929

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210929

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 1434525

Country of ref document: AT

Kind code of ref document: T

Effective date: 20230301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210929

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210929

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20250520

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20250403

Year of fee payment: 8

Ref country code: ES

Payment date: 20250620

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: HU

Payment date: 20250523

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20260305

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20260410

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FI

Payment date: 20260323

Year of fee payment: 9

Ref country code: IT

Payment date: 20260324

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20260309

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20260316

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: PL

Payment date: 20260219

Year of fee payment: 9