EP2218967A2 - Procédé et dispositif de réglage de la durée de fonctionnement d'un brûleur - Google Patents

Procédé et dispositif de réglage de la durée de fonctionnement d'un brûleur Download PDF

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Publication number
EP2218967A2
EP2218967A2 EP20100153430 EP10153430A EP2218967A2 EP 2218967 A2 EP2218967 A2 EP 2218967A2 EP 20100153430 EP20100153430 EP 20100153430 EP 10153430 A EP10153430 A EP 10153430A EP 2218967 A2 EP2218967 A2 EP 2218967A2
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EP
European Patent Office
Prior art keywords
burner
value
integral
boiler
boiler temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20100153430
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German (de)
English (en)
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EP2218967B1 (fr
EP2218967A3 (fr
Inventor
Reinhard Osterloh
Christine Hanke
Jörg Hoffmann
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.)
Viessmann Generations Group GmbH and Co KG
Original Assignee
Viessmann Werke GmbH and Co KG
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Priority to PL10153430T priority Critical patent/PL2218967T3/pl
Publication of EP2218967A2 publication Critical patent/EP2218967A2/fr
Publication of EP2218967A3 publication Critical patent/EP2218967A3/fr
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Publication of EP2218967B1 publication Critical patent/EP2218967B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/002—Regulating fuel supply using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/176—Improving or maintaining comfort of users
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/355—Control of heat-generating means in heaters
    • F24H15/36—Control of heat-generating means in heaters of burners

Definitions

  • the invention relates to a method and a device for regulating the running time of a burner, which is suitable for supplying heat to a boiler, hereinafter referred to as heat.
  • the invention relates to a method for controlling the life of a burner, which is suitable, a thermal medium, for.
  • a thermal medium for.
  • Such burners are known in the art, for. As gas or oil burners in heating systems and are e.g. as a sole heat generator or as a heat generator from a plurality of heat generators, e.g. used in bivalent heating systems.
  • gas and oil burners are known in the prior art which can be controlled in a mode in which an output burner power P Br can be continuously modulated to give a predetermined, determined or set burner power value P Br and thus equal or close the boiler temperature to keep the setpoint T SOLL .
  • the output power P Br may not be continuously down-modulated down to zero, so that the burner is controlled by clocking (burner cycles) when a heat demand, for example, depending on a building load below a minimum burner capacity of Brenners occurs.
  • the burner is switched on at a boiler temperature below the setpoint T SOLL to increase the boiler temperature above the setpoint T SOLL . If the boiler temperature is above the setpoint T SOLL , the burner is switched off again.
  • the Brenner clocks will thus alternately supply and shut down, the boiler temperature can be maintained near the setpoint T set, even if the burner capacity required for this purpose is below the minimum burner power or the minimum modulated burner power.
  • the so-called two-step control method with hysteresis is known in the prior art.
  • a so-called turn-on difference value and a so-called turn-off difference value are set. If it is now determined that the control deviation is greater than the specified switch-on difference, the burner is switched on, since the boiler temperature is then more than the specified switch-on difference below the setpoint T SOLL . When the burner is switched on, the boiler temperature is then increased by supplying heat to the boiler until it can be determined that the absolute value of the control deviation reaches or exceeds the specified switch-off difference (the switch-off difference is defined as positive). Then the burner is switched off again. This cycle is executed repeatedly so that the boiler temperature value fluctuates by cyclically switching the burner on and off by the setpoint T SOLL .
  • Very short burner run times between burner startup and shutdown often occur in the two-point controller method described above, even if relatively high turn-on and turn-off differential values are set.
  • the burner run times in a control according to the two-point control method can sometimes be less than 1 minute.
  • many switching cycles result in the two-point control method, which may in some cases comprise more than 100 switching on and off operations of the burner per day.
  • Fig. 1 shows the actual boiler temperature T IST as a function of the time t of a boiler, the heat is temporarily supplied by a burner, the burner is controlled by the known in the art two-step control method with hysteresis. Additionally shows Fig. 1 the time course of the burner power P Br according to the boiler temperature actual value T IST shown as a function of time t.
  • a boiler temperature setpoint T SOLL is set and a switch-off or switch-on difference is set.
  • the switch-off difference results from the difference between a specified temperature maximum value T MAX and the boiler temperature setpoint T SOLL .
  • the switch-off difference results from the difference between the boiler temperature setpoint T SOLL and a set minimum temperature value T MIN .
  • the current boiler temperature actual value T IST is determined in each case in order to determine a control deviation between the boiler temperature actual value T IST and the boiler temperature target value T SOLL .
  • the burner When the burner is switched on, heat is supplied to the boiler and the boiler temperature or the boiler temperature actual value T IST increases over time. If it is determined that the boiler temperature actual value T IST rises above the set maximum temperature value T MAX , the burner is switched off. In other words, if the determined control deviation between the actual boiler temperature T IST and the boiler temperature setpoint T SOLL in absolute value increases above the setpoint above the switch-off difference for boiler temperatures, the burner is switched off. As a result, the boiler temperature drops until it first drops below the setpoint T SOLL and then below the set minimum temperature value T MIN .
  • the two-point controller method leads to a cyclic switching on and off of the burner, whereby the boiler temperature varies by the set target value T SOLL .
  • the respective on and off times of the burner are in Fig. 1 represented by the dashed vertical lines.
  • the burner power P Br is shown as a function of time. In a period between switching off the burner and turning on the burner again, the burner power P Br is equal to zero (or at a low standby value).
  • the burner power P Br increases to a high burner starting power and is then modulated down to a lower value. This leads to a rapid rise in temperature in the boiler due to the high burner start-up power, which eventually drops again before it rises continuously due to a burner power P Br below the high burner start-up performance.
  • the prior art control methods for controlling a burner are known in which the two-point controller method is extended such that in addition a variable minimum pause time, z. 4 minutes, is set or set.
  • a variable minimum pause time z. 4 minutes
  • the cycle times of the burner can be increased or the number of cycles per day can be reduced.
  • such a method can cause the boiler temperature to drop too much if the boiler temperature deviation falls below the set switch-on difference before the minimum pause time has elapsed.
  • An object of the present invention is to avoid the disadvantages and problems of the known control methods of a burner and to optimize a runtime control of a burner.
  • Another object of the invention is to provide a method and apparatus for controlling a burner capable of supplying heat to a boiler to enable a lower number of cycles of the burner per day, and the problems of frequent turning on and off of the burner, such as. B. to avoid increased emissions, a reduced efficiency and increased wear.
  • a new approach is used, in which the connection of the burner not over rigid temperature limits, but on the determination of a Zuschaltintegrals by integral formation as a function of the determined control deviation, in particular a temperature parameter (as a function of time), which differs by a first constant temperature difference of the determined deviation error (as a function of time t), or on the determined deviation difference (as a function of time t ) itself is executed.
  • the invention takes advantage of the fact that a lack of inertia on the generator side (heat generation) can be supplemented by inertia on the consumer side. Furthermore, the invention takes advantage of the fact that it is crucial for the comfort of a consumer, what amount of energy is fed, and what temperature level prevails, and not the actual instantaneous performance of the burner.
  • the inventive method allows longer cycle times and a lower number of cycles of the burner per day, since it is not regulated by means of rigid temperature limits.
  • longer burner running and break times result, whereby lower emission values, higher energy savings and additionally reduced maintenance can be achieved.
  • the invention thus offers over the prior art thus an optimized control of a burner with an optimized burner runtime.
  • integral formation is carried out as a function of the determined control deviation, in particular via a temperature parameter (as a function of time), the temperature difference around the first constant temperature difference or a second constant temperature difference (as a function of the control deviation) Time t) deviates, or on the determined deviation error (as a function of time t) itself.
  • the runtime control can be further optimized by in addition to the switching on of the burner and the subsequent shutdown of the burner in the burner cycles based on an integral as a function of the control deviation .DELTA.T (t) over the time t is regulated and not on the basis of rigid temperature limits. Furthermore, a further reduction in the number of cycles of the burner per day is made possible, when on and off integrals are determined for controlling the switching on and off of burner clocking. This results in even longer burner running and break times, whereby even lower emission values, even higher energy savings and, in addition, even lower maintenance costs can be achieved.
  • At least the steps of supplying heat, determining the cut-off integral, switching off the burner, determining a turn-on integral and switching on the burner are repeated cyclically.
  • the first threshold value SW 1 can be set manually or under process control, and the method according to the invention preferably also comprises the step of setting the first threshold value SW 1 .
  • the first threshold value that is to say the switch-off integral threshold value SW 1 , to be parametrizable, for example to a desired or required system behavior.
  • the cut-off integral I AB (T) is determined by integration up to a third time t 3 , at which the actual boiler temperature T IST (T) reaches or falls below the boiler temperature setpoint T SOLL after switching off the burner, and wherein the second threshold value SW 2 is preferably set according to the value I AB (t 3 ) of the turn-off integral I AB (t) at the third time t 3 , so that the second time t 2 is preferably the time at which the absolute value
  • the invention thus preferably makes use of the fact that the value of the turn-off integral at this time t 3 is a measure of the too much introduced energy since, after the burner was switched off after exceeding the first threshold SW 1 , as long as further integrated until the boiler temperature is less than or equal to the setpoint.
  • the burner preferably remains switched off until a connection integral formed analogously to the previously determined switch-off integral achieves the same value as the previously determined switch-off integral.
  • a connection integral formed analogously to the previously determined switch-off integral achieves the same value as the previously determined switch-off integral.
  • the method according to the invention further comprises a method step of setting a control deviation limit ⁇ T MAX , wherein the burner preferably reaches or exceeds a control deviation limit ⁇ T MAX at the first time t 1 or at a fourth time t 4 at which the absolute value of the system deviation ⁇ T (t) reaches or exceeds a control deviation limit ⁇ T MAX , is switched off before the first time t 1 .
  • a high overshoot of the setpoint T SOLL can be avoided by the burner is switched off when the control deviation exceeds the control deviation limit .DELTA.T MAX .
  • the amplitudes of the control deviation can then be additionally limited by temperature values. High temperature amplitudes can thus be avoided even if the switch-off integral has not yet reached or exceeded the first threshold value SW 1, for example due to a rapid increase in temperature, although a very high control deviation already exists.
  • high temperature amplitudes can be avoided, for example in the case of a lack of volume flow of the thermal storage medium in a heating system.
  • a second control deviation limit ⁇ T MAX; 2 can be set, so that the burner is not only switched on when the connection integral reaches the second threshold SW 2 , but preferably also at a control deviation at which the boiler temperature Actual value T IST is below the boiler temperature setpoint T SOLL by more than ⁇ T MAX; 2 .
  • the inventive method further comprises the step of defining a temperature range around the boiler temperature setpoint T SOLL by setting a first temperature range value T 1 that is greater than the boiler temperature setpoint T SOLL , and a second temperature range value T 2 , which is smaller than the boiler temperature setpoint T SOLL , wherein the cut-off integral I AB (T) is preferably determined only if the determined current boiler temperature actual value T IST is greater than the first temperature range value T 1 , and / or wherein the Zuschaltintegral I ZU (t) is preferably determined only if the determined current boiler temperature actual value T IST is smaller than the second temperature range value T 2 .
  • a first temperature parameter is integrated as a function of the determined deviation which deviates from the determined control deviation by a first constant temperature difference, in particular preferably according to the difference between the first temperature range value T 1 and the boiler temperature setpoint T SOLL deviates, and preferably this is further integrated in the integration for the integral formation of the Zuschaltintegrals a second temperature parameter as a function of the determined deviation difference, the hysteresis difference from the determined deviation by a second constant temperature difference, in particular preferably according to the difference between the boiler temperature setpoint T SOLL and the second temperature range value T 2 , deviates.
  • the method according to the invention further comprises the step of resetting the determined switch-off integral I AB (t) to zero when the boiler temperature actual value T IST falls below the boiler temperature setpoint T SOLL when the burner is switched on.
  • the device according to the invention for regulating the running time of a burner which is suitable for supplying heat to a boiler is described, which is suitable for carrying out the method according to the invention.
  • the advantages are not discussed in detail since they correspond to the advantages of the method.
  • the device according to the invention is characterized in that it comprises a control deviation integral determining means for determining an integral by integral formation as a function of the control deviation ⁇ T (t) over the time t.
  • the control deviation integral determining means preferably determines a switch-off integral I AB (t) when the boiler temperature actual value T IST is greater than the boiler temperature target value T SOLL .
  • the burner is preferably turned off by the burner control means at a first time t 1 at which the value I AB (t 1 ) of the turn-off integral I AB (t) reaches a first threshold SW 1 for supplying heat to finish by the burner.
  • control deviation integral determining means preferably determines a turn-on integral I ZU (t) when the boiler temperature actual value T IST is smaller than the boiler temperature target value T SOLL , and the burner is preferably switched on by the burner control means at a second time t 2 at which the value I ZU (t 2 ) of the connection integral I ZU (t) reaches a second threshold value SW 2 in order to supply heat to the boiler through the burner.
  • the device according to the invention further comprises a threshold value setting means for setting the first threshold value SW 1 .
  • the control deviation integral determining means determines the cut-off integral I AB (t) by integral formation as a function of the control deviation .DELTA.T (t) until a third time t 3 at which the actual boiler temperature T IST reaches the boiler temperature setpoint T SOLL after switching off the burner or below, and preferably, the burner control means sets the second threshold SW 2 corresponding to the value I AB (t 3 ) of the turn-off integral I AB (t) at the third time t 3 , so that the second time t 2 is preferably the time in that the absolute value of the turn-on integral I ZU (t) reaches or exceeds the absolute value of the turn-off integral I AB (t) at the third time t 3 .
  • the apparatus for controlling the running time of a burner further comprises a control deviation limit setting means for setting a control deviation limit ⁇ T MAX , the burner preferably at the first time t 1 or at a fourth time t 4 , at which the absolute value of the control deviation difference .DELTA.T (t) reaches or exceeds a control deviation threshold ⁇ T MAX before the first time t 1 is turned off by the burner control means.
  • a control deviation limit setting means for setting a control deviation limit ⁇ T MAX , the burner preferably at the first time t 1 or at a fourth time t 4 , at which the absolute value of the control deviation difference .DELTA.T (t) reaches or exceeds a control deviation threshold ⁇ T MAX before the first time t 1 is turned off by the burner control means.
  • control deviation limit setting means is further adapted to set a second control deviation limit ⁇ T MAX; 2 so that the burner can be switched on analogously when the control deviation difference ⁇ T (t) reaches or exceeds a control deviation threshold ⁇ T MAX; 2 before the injection integral becomes the second threshold SW 2 reached.
  • the inventive device further comprises a temperature range defining means for defining a temperature region around the boiler temperature set point T set by setting a first temperature range value T 1, which is preferably greater than the boiler temperature set point T set and a second temperature value T 2 which is preferably less than the boiler temperature setpoint T SOLL , wherein the cut-off integral I AB (t) is preferably determined by the control deviation integral determining means only when the determined current boiler temperature actual value T IST is greater than the first temperature range T 1 , and the Zuschaltintegral I ZU (t) preferably only then determined by the control deviation integral determining means when the determined instantaneous boiler temperature actual value T IST is smaller than the second temperature range value T 2 .
  • a temperature range defining means for defining a temperature region around the boiler temperature set point T set by setting a first temperature range value T 1, which is preferably greater than the boiler temperature set point T set and a second temperature value T 2 which is preferably less than the boiler temperature setpoint T SOLL , wherein the cut-off integral I
  • a first temperature parameter is integrated as a function of the determined deviation which deviates from the determined control deviation by a first constant temperature difference, in particular preferably according to the difference between the first temperature range value T 1 and the boiler temperature setpoint T SOLL deviates, and preferably this is further integrated in the integration for the integral formation of the Zuschaltintegrals a second temperature parameter as a function of the determined deviation difference, the hysteresis difference from the determined deviation by a second constant temperature difference, in particular preferably according to the difference between the boiler temperature setpoint T SOLL and the second temperature range value T 2 , deviates.
  • the apparatus of the invention further comprises an integral reset means for resetting an integral determined by the error integral integral determining means to zero, the integral resetting means resetting the determined disable integral I AB (t) to zero, preferably, when the actual temperature of the boiler T IS the boiler temperature setpoint T set below at zuushem burner.
  • the integral reset means may preferably also be suitable for resetting the determined switch-off integral I AB (t) to zero when the boiler temperature actual value T IST falls below the first temperature range value T 1 when the burner is switched on.
  • Fig. 2 shows a burner 10, a boiler 20 and a device 30 for controlling the burner 10, in a schematic representation.
  • the burner 10 is adapted to a thermal storage medium, for. As water or oil to supply heat in the boiler 20, wherein the burner 10 is controlled by the device 30 for controlling a burner 10.
  • the kettle 20 is in this case e.g. an independent boiler, z. As a water boiler, or a to a heating system z. B. a building connected boiler.
  • the burner 10 may be e.g. to trade a gas or oil burner.
  • a control method according to the invention is not limited to the regulation of gas or oil burners, and may generally be applied to any device capable of being switched on and off to temporarily supply heat to a boiler.
  • Fig. 3 shows a flowchart of a method for controlling a burner according to a first embodiment of the present invention.
  • the method includes the steps S31 Adjust kettle temperature set point T set, S32 connection of the torch 10, S33 supplying heat, S34 determining the boiler temperature actual value T (t), S35 determining the deviation difference .DELTA.T (t), S36 determining the Abschaltintegrals I AB (t), S37 Turning off the burner 10, and S38 determining the Zuschaltintegrals I ZU (t).
  • step S31 setting the boiler temperature target value T SOLL a set value of the boiler temperature is set, based on which the control of the burner 10 is executed according to the control method of the present invention.
  • the following describes the method for controlling a burner 10 based on a one-time setting of the boiler temperature setpoint T SOLL .
  • the present invention is not limited to the one-time setting of the boiler temperature target value T SOLL .
  • a new boiler temperature setpoint T SOLL can be set.
  • step S32 connecting the burner 10 the switched-off burner 10 is switched on in order to supply heat to the boiler 20 in step S33.
  • S34 determining the actual value of the boiler temperature T (t) is determined the boiler temperature as a function of time t in step.
  • a current boiler temperature, or the instantaneous boiler temperature actual value T IST either continuously or repeatedly or periodically determined.
  • the actual boiler temperature T IST can be determined directly as a function of the time t. If the boiler temperature actual value T IST is repeated or periodically z. B. always determined after the expiration of a set time interval .DELTA.t, the boiler temperature actual value T IS is determined as a step function of the time t.
  • the boiler temperature actual value T IST is in this case determined such that an integral formation by integration of the boiler temperature actual value T IST with the time t is possible.
  • the switch-off integral can be determined as the sum of the determined values (step function values) multiplied by ⁇ t (determination of an area below a step function).
  • the switch-off integral I AB (t) is thus determined by integration of the control deviation ⁇ T (t) over the time t when the actual boiler temperature T IST is above the boiler temperature setpoint T SOLL . Since in the definition of the control deviation difference .DELTA.T above above the nominal temperature T of the boiler, a desired value is set negative value is determined, wherein determining the Abschaltintegrals I AB (t) is the absolute value of the deviation difference .DELTA.T (t) is determined to determine a positive Abschaltintegral I AB (t).
  • the present invention is not limited to this determination of the turn-off integral I AB (t) and can also be determined without absolute value formation, possibly by simultaneously adapting the signs of threshold values.
  • the determined switch-off integral I AB (t) rises to a set first threshold value SW 1 , so that according to the invention it is ascertained that the burner 10 is to be switched off at the time t 1 , since the certain cut-off integral I AB at this time t 1 has reached or exceeds the threshold SW 1 .
  • the burner 10 is thus not switched off when the boiler temperature actual value T IST exceeds a maximum value T MAX , but when the particular turn-off integral I AB , determined by integration of the control deviation difference .DELTA.T, reaches a threshold SW 1 or exceeds.
  • step S37 switching off the burner causes the heat supply of the burner 10 to the boiler 20 to be ended by switching off the burner 10. This is followed by the boiler temperature, since the boiler 20 no heat is supplied through the burner 10 more.
  • control deviation ⁇ T e.g negative threshold values
  • the determined value of the Zuschaltintegrals I ZU (t) increases and reaches a second at a time t 2 Threshold SW 2 . If it is determined that the connection integral I ZU (t) reaches or exceeds the second threshold value SW 2 , the burner is switched on again in step S 32, switching on the burner in order to re-supply heat to the boiler 20.
  • the connection integral I ZU (t) reaches or exceeds the second threshold value SW 2 .
  • the steps S32 to S38 are repeated cyclically, so that the burner is switched on cyclically when the particular turn-on integral I ZU (t) reaches or exceeds the second threshold SW 2 , to be switched off, respectively, when the determined turn-off integral I AB (t) reaches or exceeds the first threshold SW 1 .
  • the method comprises the steps S401 setting the boiler temperature setpoint T SOLL , S402 setting the first threshold SW 1 , S403 defining the temperature range (dead zone), S404 setting the control deviation limit ⁇ T MAX , S405 Switching on the burner, S406 Supplying heat, S407 Determining the boiler temperature actual value T IST (t), S408 Determining the control deviation difference ⁇ T (t), S409 Determining the switch-off integral I AB (t), S410 Switching off the burner 10, S411 Determining the switch-off integral I AB (t), and S412 determining the turn-on integral I ZU (t).
  • step S401 setting of the boiler temperature target value T SOLL is made in analogy with step S31 in FIG Fig. 3 set a boiler temperature setpoint T SOLL .
  • a first threshold value SW 1 is set, which analogously to the exemplary embodiment in FIG Fig. 3 represents a threshold value for the turn-off integral I AB (t) in order to indicate from which value of the turn-off integral I AB (t) the burner 10 is to be switched off according to the invention.
  • a temperature range around the set boiler temperature setpoint T SOLL is defined by setting a first temperature range value T 1 greater than the boiler temperature setpoint T SOLL and setting a second temperature range value T 2 less than the set boiler temperature setpoint T SHOULD .
  • the step S403 defining the temperature range, or the so-called dead zone may be performed by individually setting the first and second temperature range values T 1 and T 2 , or by setting a half width of the dead zone so that the first temperature range value T 1 and the second Temperature range value T 2 each lie around the half-value of the dead zone above or below the set boiler temperature setpoint T SOLL .
  • step S404 setting of the control deviation limit value ⁇ T MAX , a maximum control deviation limit value ⁇ T MAX is set in order to limit large temperature amplitudes or large temperature fluctuations of the boiler temperature by the boiler temperature setpoint T SOLL, in addition to limiting the closing and closing integrals, additionally by absolute temperature values.
  • the burner 10 may be switched on or off if the control deviation ⁇ T exceeds the set control deviation limit value ⁇ T MAX , although a specific switch-on integral has not yet reached the first or the second threshold value.
  • two different control deviation limits can be set to limit a control deviation above and / or below the threshold independently of each other.
  • steps S405 of connecting the burner and S406 supplying heat analogously to steps S32 and S33 in FIG Fig. 3 ,
  • Step S407 determine the boiler temperature actual value T IST (t)
  • steps S408 determine the control deviation difference ⁇ T (t). Both the boiler temperature actual value T IST and the control deviation difference ⁇ T are analogous to the method in Fig. 3 determined as a function of time t.
  • the switch-off integral I AB (t) was determined from a time ⁇ 0 at which the boiler temperature exceeds the boiler temperature setpoint T SOLL
  • the switch-off integral I AB (t) is determined from a time ⁇ AB in this exemplary embodiment of the method, at which the boiler temperature leaves the defined temperature range, or the dead zone, by the boiler temperature setpoint T SOLL :
  • I FROM t ⁇ ⁇ FROM t ⁇ ⁇ T ⁇ - T 1 - T SHOULD ⁇ d ⁇
  • a surface area below the time profile of the boiler temperature actual value T IST is formed up to the first temperature range value T 1 , so that an area between the temperature range value T 1 and the boiler temperature setpoint T SOLL remains unconsidered.
  • the present invention is not limited to such integral formation, and it is possible to provide embodiments of the invention in which integral formation is performed over the entire control deviation .DELTA.T, wherein the integral formation only begins at a time at which the boiler temperature actual value T IST defined temperature range or the dead zone leaves.
  • step S410 of turning off the burner 10 the burner 10 is turned off when the value of the cut-off integral I AB (t) reaches or exceeds the set first threshold SW 1 , or if previously the absolute value of the control deviation ⁇ T exceeds the set maximum value for the control deviation ⁇ T MAX reaches or exceeds.
  • a heat supply from the burner 10 to the boiler 20 is changed, so that the boiler temperature begins to decrease.
  • the shutdown integral I AB (t) is still determined in step S411 after switching off the burner.
  • the switch-off integral I AB (t) is determined at least until a point in time at which the decreasing boiler temperature reaches or falls below the first temperature range value T 1 .
  • the switch-off integral I AB (t) is further determined until a time t 3 at which the boiler temperature actual value T IST reaches or falls below the first temperature range value T 1 .
  • the steps S405 to S412 are repeated cyclically, so that the boiler temperature actual value T IST fluctuates around the boiler temperature setpoint T SOLL .
  • FIG. 12 shows a cycle of a burner, which according to the method for controlling a burner after the in Fig. 4 described second embodiment of the present invention is regulated.
  • Fig. 5 shows the temperature profile of the boiler temperature as a function of time t and the corresponding time course of the burner power P Br as a function of time t.
  • the set setpoint T SOLL for the boiler temperature is represented by a horizontal line.
  • Above and below the set target value T SOLL are two more horizontal Lines are shown, which define the dead zone or the defined temperature range around the boiler temperature setpoint T SOLL and represent the first and second temperature range values T 1 and T 2 .
  • another horizontal line represents the set maximum control deviation ⁇ T MAX .
  • the burner 10 is switched on, represented by the increase of the burner power at the time t 0 (S405).
  • the boiler temperature rises due to the connection of the burner 10 and reaches or exceeds the boiler temperature setpoint T SOLL and shortly thereafter at a time ⁇ AB the first temperature range value T 1 .
  • the determination of the turn-off integral I AB (t) starts in step S409.
  • the determined value of the cut-off integral I AB (t) reaches the set first threshold value SW 1 , so that the burner is switched off at this time t 1 , represented by the decrease in the burner power P Br at the time t 1 (S410).
  • the Abschaltintegral I AB (t) will now be further determined in step S411 until the actual boiler temperature T, at a time t 3 reaches the first temperature range T 1 value and below.
  • the hatched area below the course of the boiler temperature as a function of the time t between the times ⁇ AB and t 3 corresponds to the value of the turn-off integral I AB (t 3 ) at the time t 3 .
  • This value is set as the new second threshold value SW 2 for the next addition integral I ZU (t) to be determined.
  • Fig. 6 illustrates the operation of the set control deviation maximum value ⁇ T MAX .
  • the boiler temperature rises after switching on the burner 10 at a time t 0 .
  • the boiler temperature exceeds the first temperature range value T 1 and the determination of the switch-off integral I AB (t) begins.
  • the control deviation increases Connecting the burner 10 so fast that the boiler temperature T actual at a time t 4 reaches a value at which the absolute value of the determined instantaneous control deviation .DELTA.T (t 4 ) reaches the set control deviation maximum value .DELTA.T MAX .
  • the burner is switched off at this time t 4 , although the value of the switch-off integral I AB (t 4 ) has not yet reached or exceeded the first threshold value SW 1 at this time t 4 Has.
  • a temperature range, or a dead zone (eg, 1 K) is defined, with no turn-on integrals formed within the dead zone. Within this dead zone the integration is stopped.
  • the value of the cut-off integral I AB (t) is additionally reset even if the boiler temperature actual value T IST falls below the boiler temperature setpoint T SOLL when the burner is in operation.
  • the Abschaltintegral is reset to the value zero, or the time at which the boiler temperature actual value T IST exceeds the boiler temperature setpoint T SOLL again used as a new starting time for the determination of the Abschaltintegrals I AB (t).
  • a long-running burner is switched off in a modulating operation by accumulating small control deviations.
  • modulating operation a small fluctuation in the boiler temperature within the defined dead zone may also occur, in which, according to the second embodiment of the present invention, no turn-off and turn-on integrals are also formed.
  • no cumulation occurs in the determination of the ab- or Zuschaltintegrale on, so that small deviations within the dead zone can not lead to unnecessary or undesirable switching on and off of the burner 10.
  • Fig. 7 shows an apparatus for controlling a burner according to an embodiment of the present invention, which is adapted to perform at least one of the inventive method according to the above-described embodiments of the present invention.
  • the apparatus 30 for controlling a burner 10 according to an embodiment of the present invention comprises a boiler temperature target value setting means 31, a boiler temperature actual value determining means 32, a control deviation determining means 33, a burner control means 34, a control deviation integral determining means 35, a threshold value Adjustment means 36, a deviation control limit setting means 37, and a temperature range defining means 38.
  • the boiler temperature target value setting means 31 is adapted to set a target value for the boiler temperature, that is, the above-described boiler temperature target value T SOLL for the control of the burner 10.
  • the boiler temperature actual value determining means 32 is suitable for determining the instantaneous value of the boiler temperature, that is to say the boiler temperature actual value T ACT, in at least one part of the boiler.
  • the boiler temperature actual value determining means 32 comprises for this purpose at least one means for measuring the boiler temperature in a region of the boiler or a plurality of means for determining boiler temperatures at different points of the boiler, the boiler temperature actual value determining means 32 being optionally suitable for determine further processing and determined by the variety of means boiler temperature values, optionally by weighted or unweighted averaging, to determine an actual value T IST.
  • the boiler temperature actual value determining means 32 is adapted to determine the actual value of the boiler temperature continuously or repeatedly or periodically.
  • the boiler temperature T IST can be determined as a function of time t.
  • the control deviation determining means 33 is suitable for determining a control deviation ⁇ T between the set boiler temperature setpoint T SOLL and the currently determined boiler temperature actual value T IST .
  • the control deviation integral determining means 35 is adapted to integrate the control deviations ⁇ T (t) continuously or repeatedly determined by the control deviation determining means 33 over the time t, to determine integrals as a function of the control deviation and / or the absolute value of a specific integral over time t form.
  • the burner control means 34 is adapted to turn on and off the burner 10 based on the determined turn-on and turn-on integrals determined by the control deviation integral determining means 35.
  • the temperature range defining means 38 is adapted to define a temperature range, or a dead zone, to define the set boiler temperature setpoint T SOLL .
  • the temperature range defining means 38 is adapted to set a first temperature range value T 1 greater than the boiler temperature target value T SOLL and a second temperature range value T 2 smaller than the boiler temperature target value T SOLL or to define a temperature range around the boiler temperature target value T SOLL by setting a Temperature range half width, which defines half the width of the temperature range to be defined, wherein the boiler temperature setpoint T SOLL is in the center of the defined temperature range.
  • the threshold setting means 36 is adapted to a first threshold value SW 1 and / or second threshold value SW 2, set as threshold values for the particular feed and Abschaltintegrale, which are determined by the deviation determining means integral 35th
  • the burner control means 34 is suitable for switching off the burner 10 when a certain switch-off integral I AB (t) reaches or exceeds the first threshold value SW 1 , and to switch off the burner 10 when a switch-on integral I ZU (t) determined by the control deviation integral determining means 35 reaches or exceeds the second threshold SW 2 .
  • the control deviation threshold setting means 37 is adapted to set a maximum value for the control deviation as the control deviation threshold ⁇ T MAX so that large temperature amplitudes can be avoided by the burner control means 34 turning off the burner when the control deviation determined by the control deviation determining means 33 ⁇ T or the absolute value thereof reaches the set control deviation threshold ⁇ T MAX before a turn-on integral determined by the control deviation integral determining means 35 reaches or exceeds a predetermined threshold value.
  • the apparatus 30 for controlling a burner 10 further comprises integral reset means 39, which is adapted to reset an integral determined by the control deviation integral determining means 35 to the value zero when the actual boiler temperature T IST falls within the defined temperature range Zone) penetrates, in particular, when the boiler temperature actual value T ACT falls back to the defined temperature range when the burner is switched on.
  • a control method of a burner is thus provided in which further loss of comfort for a user is avoided.
  • the over-supply or under-supply occurring only briefly within one cycle can be compensated by the inertia on the consumer side.
  • a desired behavior long run times or low temperature amplitudes desired
  • a single parameter eg the first threshold SW 1
  • the second threshold value SW 2 for the turn-on integral is determined on the basis of the previously determined turn-off integral
  • the method according to the invention is suitable both for gas burners and for oil burners, as well as for other burner types which are clocked for loads below a minimum modulatable burner output.
  • the method is suitable for heating systems for all building types and design temperatures and offers a high level of robustness due to the integral approach, according to which the burner shutdown and connection times are determined in a cycle not on the basis of rigid temperature limits, but on the basis of an integral of the control deviation over time t.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Control Of Combustion (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)
EP10153430.3A 2009-02-12 2010-02-12 Procédé et dispositif de réglage de la durée de fonctionnement d'un brûleur Not-in-force EP2218967B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10153430T PL2218967T3 (pl) 2009-02-12 2010-02-12 Sposób i urządzenie do regulowania czasu eksploatacji palnika

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009008649A DE102009008649B4 (de) 2009-02-12 2009-02-12 Verfahren und Vorrichtung zum Regeln der Laufzeit eines Brenners

Publications (3)

Publication Number Publication Date
EP2218967A2 true EP2218967A2 (fr) 2010-08-18
EP2218967A3 EP2218967A3 (fr) 2014-05-14
EP2218967B1 EP2218967B1 (fr) 2015-11-25

Family

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Application Number Title Priority Date Filing Date
EP10153430.3A Not-in-force EP2218967B1 (fr) 2009-02-12 2010-02-12 Procédé et dispositif de réglage de la durée de fonctionnement d'un brûleur

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Country Link
EP (1) EP2218967B1 (fr)
DE (1) DE102009008649B4 (fr)
DK (1) DK2218967T3 (fr)
PL (1) PL2218967T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3779286A1 (fr) 2019-08-12 2021-02-17 Huu-Thoi Le Procédé de fonctionnement d'une installation de chauffage
DE102019005722A1 (de) * 2019-08-12 2021-02-18 Huu-Thoi Le Verfahren zum Betrieb einer Heizungsanlage

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3029131A1 (de) * 1980-07-31 1982-02-18 Fr. Sauter AG, Fabrik elektr. Apparate, Basel Verfahren und anordnung zur steuerung einer raumheizung
DE3330990A1 (de) * 1982-09-13 1984-03-15 Lothar 6030 Ebikon Brenner Verfahren zum regeln von kesselanlagen fuer fluessige und/oder gasfoermige brennstoffe mit mindestens einem brenner und anlage zur ausfuehrung des verfahrens
DE3442441A1 (de) * 1983-12-24 1985-07-04 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Verfahren zum ermitteln der fuer eine schnellaufheizung eines raumes benoetigten zeit
DE3426937C1 (de) * 1984-07-21 1986-01-09 Danfoss A/S, Nordborg Einrichtung zum Festlegen der Ein- und Ausschaltperioden eines Brenners einer Warmwasser-Heizungsanlage
DE19649157A1 (de) * 1996-11-27 1998-05-28 Bosch Gmbh Robert Vorrichtung zur Heizungsregelung

Non-Patent Citations (1)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3779286A1 (fr) 2019-08-12 2021-02-17 Huu-Thoi Le Procédé de fonctionnement d'une installation de chauffage
DE102019005722A1 (de) * 2019-08-12 2021-02-18 Huu-Thoi Le Verfahren zum Betrieb einer Heizungsanlage

Also Published As

Publication number Publication date
DE102009008649B4 (de) 2013-03-28
PL2218967T3 (pl) 2016-07-29
DE102009008649A1 (de) 2010-08-26
EP2218967B1 (fr) 2015-11-25
EP2218967A3 (fr) 2014-05-14
DK2218967T3 (da) 2016-02-29

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