DK2218967T3 - Method and device for regulating a burner running time - Google Patents

Description

1

The invention relates to a method and a device for regulating the running time of a burner suitable for supplying heat energy to a boiler, hereinafter simply called heat.

In particular, the invention relates to a method for controlling the run time of a burner suitable for applying heat to a thermal medium, e.g. water or oil, in a boiler or heat storage, to increase the temperature of the thermal storage medium in the boiler by heat supply, based on setting a boiler temperature setting value TSoll

BACKGROUND OF THE INVENTION Such burners are known in the art, e.g. gas or oil burners in heating systems and used e.g. as the only heat generator or a heat generator among several heat generators, e.g. in bivalent heating systems.

Furthermore, gas and oil burners are known in the art which can be controlled in an operation type in which a delivered burner power PBr can be continuously modulated to deliver a predetermined, determined or set burner power value PBr and thus keep the boiler temperature equal to or close to the set value TSoll-The output However, for such regulated gas and oil burners, PBr may not be continuously downgraded to zero, so that the burner is controlled by timing (burner timing) when a heat supply requirement, e.g. Depending on a building load, there is a minimal burner effect of the burner.

Hereby the burner is switched on at a boiler temperature below the set value Tsoll to increase the boiler temperature to above the set value TSoll - At a boiler temperature above the set value TSoll the burner is switched off again. As the burner beats, ie. switched on and off alternately, the boiler temperature can be kept close to the setting value Tsoll, even when the required burner power is below the minimum burner power or the minimum modular burner power.

As a method of controlling such a gas or oil burner, the 2 so-called two-point control method with hysteresis is known in the art. In the two-point control method, a control deviation ΔΤ of the boiler temperature is determined by the boiler temperature setting value TSoll by forming a difference between the boiler temperature setting value TSoll and an instantaneous boiler temperature, the so-called actual boiler temperature value T | St: ΔΤ =.

If a control deviation ΔΤ greater than zero is determined, the boiler temperature is below the set value Tsoll and otherwise, at a determined ΔΤ which is less than zero, the boiler temperature is momentarily above the set value Tsoll. In accordance with the two-point control method with hysteresis, a so-called value is determined. a so-called disconnect difference value. If it is now determined that the control deviation is greater than the determined connection difference, the burner is switched on, since the boiler temperature then, to a greater extent than the determined connection difference, is below the set value Tsoll. When connected to the burner, the boiler temperature is increased until the boiler can be added until that the absolute value of the control deviation reaches or exceeds the determined disconnection difference (hereby the disconnection difference is defined positively). Then the burner is switched off again. This cycle is performed repeatedly so that the boiler temperature value during cyclic switching on and off of the burner swings around the setting value Tsoll. In the above described two-point control method, very short burner run times often occur between switching on and off the burner, even when relatively high switching on and off is determined. frakoblingsdifferenceværdier. The burner run times in a control according to the two-point control method may be partially less than 1 minute. However, since the burner may need to be reconnected only a short time thereafter, and thus a short period of time may occur, many switching cycles result in the two-point control method, which may partially include over 100 on and off switches of the burner per day.

Furthermore, a high dynamic load of the boiler occurs due to rapid 3 temperature rise and subsequent rapid temperature reduction at short period duration and high number of switching cycles per hour. day.

At the short cycle times or period durations or at the high cycle number per day. Furthermore, further problems arise during the day when the burner is frequently switched on and off. Thus, e.g. poor emission values for the burner, a reduced utilization rate and also increased wear.

In the case of oil burners, there may also be a strong soiling of a heat exchanger of soot due to the poor emission values.

FIG. 1 shows the actual boiler temperature value Tist as a function of time t of a boiler to which heat is periodically supplied via a burner, where the burner is controlled according to the prior art hysteresis control method with prior art. Furthermore, FIG. 1 shows the temporal course of the burner power PBr corresponding to the actual boiler temperature value T! St as a function of time t.

According to the hysteresis two-point control method, a boiler temperature setting value TSoll is set and a switch-off or switch-on difference is determined. The disconnection difference results from the difference between a set temperature maximum value TMax and the boiler temperature setting value Tsoll. The disconnection difference results from the difference between the boiler temperature setting value Tsoll and a set minimum temperature value ΤΜιν the actual boiler temperature value T! St and the boiler temperature setting value Tsoll ·

When the burner is switched on, heat is added to the boiler and the boiler temperature or the actual boiler temperature value T | St is increased over time. If it is now determined that the actual boiler temperature value T! St rises above the set maximum temperature value TMax, the burner is switched off. In other words, when the determined control deviation between the actual boiler temperature value Tist and the boiler temperature setpoint TSoll in the absolute value at boiler temperatures above the set point value rises above the disconnect difference, the burner is disconnected. Thereafter, the boiler temperature drops 4 until it first falls below the set value TSoll and then falls below the set minimum temperature value TMin

If it is now determined that the actual boiler temperature value T \ Sj has fallen below the minimum temperature TMin, ie. in other words, the control deviation below the set value exceeds the set switching difference, reconnects the burner so that heat to heat is applied to the boiler and the boiler temperature rises again.

As shown in FIG. 1, the two-point control method thus entails cyclic switching on and off of the burner, whereby the boiler temperature fluctuates around the set setting value TSoll-Do. The relevant switching on or off times for the burner are shown in fig. 1 with the dotted vertical lines. In the lower part of FIG. 1, the burner power PBr is shown as a function of time. For a period of time between switching off the burner and another switching on of the burner, the burner power PBr is equal to zero (or at a low readiness value).

If the burner is switched on at a certain time, the burner power PBr is increased to a high burner starting power and then modulated to a lower value. This results in a rapid rise in temperature in the boiler due to the high burner starting power, which may only fall again before continuously saying below the high burner starting power due to the burner power PBr.

However, due to the high burner starting power, the high temperature rise may occur without much delay beyond the set temperature maximum value TMax, thereby disabling the burner in the two-point control method with hysteresis again. This can result in a very short burner time in which the boiler is dynamically loaded by the rapid temperature fluctuations and high temperature amplitudes, and furthermore this can lead to combustion with high emission values. Such premature burner disconnection at a temperature surge due to the high burner starting power is shown in FIG. 1 in the second cycle.

In order to avoid the problems described above by the two-point control method, it is known in the art to select high on and off difference values, e.g. a switching difference of 6 K (Kelvin) and a switching difference of 5 approx. 8 K. This allows the burner cycle times to be extended, or the number of cycles per hour. day can be reduced. However, in this approach, the additional problem is that the amplitudes of the boiler temperature fluctuation around the TSoll setpoint increase at high on and off difference values. This could possibly result in a limited burner utilization capacity. It is known that high switching on and off switches are unsuitable for several heating systems, e.g. low temperature underfloor heating system where the boiler is directly connected, ie. without mixer, for a heating circuit, e.g. floor heating.

With the above-mentioned example values for the coupling difference (6 K) and the switch-off difference (8 K), a boiler setting temperature of e.g. 26 ° C is a cycle in which a burner is first switched on when the boiler temperature drops below 20 ° C and the burner is only switched off again when the boiler temperature is at 34 ° C. This causes the problem of a building being completely cooled before the burner starts again. Then, when the burner is running, however, the building overheats. For a period of time that in practice can last for several days, this means that a residence temperature in the building one day is too cold and another day is too hot.

Furthermore, control methods for controlling a burner are known in the art, wherein the two-point control method is extended in such a way that a variable minimum pause time, e.g. 4 minutes, furthermore set or set. In addition to the burner switching criterion based on the comparison of the control deviation with the set switching difference value, it is then checked whether the set minimum pause time has expired since the last switching off of the burner.

This can increase the burner cycle times, or the number of cycles per day. day can be reduced. Such a method can cause the boiler temperature to drop too much when the boiler temperature control deviation falls below the set switching difference before the expiry of the minimum break time. DE 34 26 937 C1 describes a device for determining a switch-on and switch-off periods of a burner which heats a heat exchanger of a hot-water system. The heat exchanger is in a row with a circulation pump and 6 parallel to an overflow line. A temperature sensor measures the measurement temperature of the water flowing out of the heat exchanger. The difference between a reference temperature and the measured temperature measured by the temperature sensor is fed to an integrator. A hysteresis switch causes the burner to be switched on when the integration value reaches one limit value of the hysteresis switch, and the burner disconnect when the integration value reaches the other limit value. DE 196 49 157 A1 discloses a device for heat control with a burner which heats a heating medium, where a time course of an actual temperature arises which depends on the heat effect, the thermal behavior of the plant and the building to be heated. A controller operates the burner via a switch, where the switching time depends on a target for a surface that is influenced by the actual temperature over time. DE 33 30 990 A1 discloses a method for regulating boiler systems by specifying a setting output temperature and comparing the actual output temperature as control size by integrating the resulting control differential to activate a burner where the integration of the control difference is done digitally.

Summary of the Invention

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 run-time control of a burner.

In particular, it is also an object of the invention to avoid the above-described disadvantages and problems of the known two-point control methods with hysteresis and the extended two-point control method with a further minimum pause time of the burner.

It is a further object of the invention to provide a method and device for regulating a burner suitable for supplying heat to a boiler, to allow a lower switching cycle number of the burner per unit. per day and to avoid the problems of frequent switching on and off of the burner, 7 such as increased emission values, reduced utilization rate and increased wear.

In order to fulfill the above described objects of the invention, a method for controlling the run time of a burner according to claim 1 and a device for regulating the run time of a burner according to claim 7 are proposed. Preferred embodiments are described in the dependent claims.

The method of the invention for controlling the run time of a burner suitable for supplying heat to a boiler comprises the following process steps: • setting a boiler temperature setting value TSoll indicating a boiler temperature setting value, • applying heat through the burner to the boiler, • continuously or repeatedly detecting an instantaneous actual boiler temperature value T | St, which depends on a momentary temperature in at least a portion of the boiler volume, to determine the actual boiler temperature value Tisi (t) as a function of time t, and • continuous or repeated determination of an instantaneous control deviation difference ΔΤ, which indicates a difference between the set keel temperature setpoint TSoll and the determined instantaneous boiler temperature value T | St, to determine the control deviation difference ΔΤ (ΐ) as a function of time t.

The method of controlling the run time of a burner according to the invention further comprises the process steps: • determining a disconnection integral Iab (0 at integral formation depending on the control deviation difference ΔΤ (ί) over time t, when the actual boiler temperature value T | St is greater than boiler temperature setting TS, Disconnecting the burner at a first time t-ι, where the value Ιαβ (ϊ-ι) of the disconnecting integral ΙΑβ (ϊ) reaches a first threshold value SW-ι, to terminate the supply of heat via the burner. For control of a burner, contrary to the prior art, a prior art approach is used in which firing of the burner is not carried out even over rigid temperature limits, but on the determination of a connection integral in integral formation depending on the determined control deviation, especially over a temperature parameter. (as fu time deviation) that deviates from the established regulatory deviation difference (as a function of time t) with a first constant temperature difference, or above the established regulatory deviation difference (as a function of time t).

The invention utilizes the fact that a lack of mass inertia on the generator side (heat generation) is complemented by mass inertia on the consumer side. Furthermore, the invention utilizes the fact that for the convenience of the consumer, it is decisive what amount of energy is supplied and what temperature level is prevailing and not the actual instantaneous effect of the burner.

The method according to the invention further allows for longer cycle times and a lower number of cycles for the burner per second. per day, since there is no regulation based on rigid temperature limits. Accordingly, according to the invention, longer burner run and pause times are obtained, whereby lower emission values can be obtained, a greater energy saving and further reduced need for maintenance. The invention thus provides, relative to the prior art, an optimized control of a burner with optimized burner run time.

The method of controlling the run time of a burner according to the invention further comprises the further process steps: • determining a connection integral lZu (t) by integral formation depending on the control deviation difference AT (t) over time t when the actual boiler temperature value Tist is less than boiler temperature setting value TS , and / or • switching on the burner at another time t2, where the value Izu (t2) of the connection integral lZu (t) reaches another threshold SW2, to supply heat to the boiler via the burner.

As described above with respect to the disconnection integral, an integral formation is hereby carried out depending on the determined control deviation, 9 in particular via a temperature parameter (as a function of time) which deviates with the first constant temperature difference or with the second constant temperature difference from the determined regulation deviation difference (as function of time t), or via the established regulatory deviation difference (as a function of time t). In this way, the run-time control can also be optimized, since in addition to switching on the burner, the subsequent switching off of the burner at the burner stroke is also controlled over time t from an integral depending on the control deviation AT (t) and not from rigid temperature limits. Furthermore, a further reduction in the number of burner cycles per unit is possible. per day, when connecting and disconnecting integrals for controlling burner switching on and off are determined. This results in even longer burner driving and pause times, which means that even lower emission values can be achieved, an even greater energy saving and an even more reduced need for maintenance. In the method according to the invention, cyclically at least the steps of heat supply, determination of the disconnection integral, disconnection of the burner, determination of a connection integral and connection of the burner are repeated. In this way, it is possible that the boiler temperature value can be kept close to the set boiler temperature setting value TSoll by cyclically switching on and off the burner.

Preferably, the first threshold SW1 can be manually or process-controlled, and the method according to the invention further preferably comprises the step of setting the first threshold SW-i. In this way, it is possible that the first threshold, i.e. the decoupling integral threshold SW-ι can be parameterized, e.g. to a desired or required plant behavior. In the method of the invention, further, the shutdown integral IAs (t) is determined by integration until a third time t3, where the actual boiler temperature value T isT (t) reaches or falls below the boiler temperature setting value TSoll after switching off the burner, and the second threshold SW2 is preferably corresponding to the value Ιαβ (Ϊ3) of the disconnection integral Ιαβ (ϊ) is determined at the third time t3 such that the second time t2 is preferably the time when the absolute value | zu (t) | of the coupling integral lzu (t) reaches or exceeds the absolute value | Ιαβ (Ϊ3) | of the disconnection integral Ιαβ (ϊ) at the third time t3. Thus, a dynamic switching integral threshold SW2 is enabled. Thus, the invention preferably utilizes the fact that the value of the decoupling integral at this time t3 is a measure of the input energy which is too much, since, after the burner has been disconnected after exceeding the first threshold value SW-ι, until the boiler temperature is less than or equal to the set value.

Furthermore, the burner preferably remains disconnected until a switching integral formed analogously to the previously determined disconnection integral reaches the same value as the predetermined disconnection integral. In this way, it is possible that the burner (when the burner is switched off) is under-supplied to the same extent as previously supplied. Thus, over an average time, neither an over nor under supply occurs. The only short-term over- and under-supply does not create any loss of comfort, since these are essentially only in one burner cycle and are thus offset by the entire inertia of the system.

Preferably, the method of the invention further comprises a method step for setting a control deviation threshold value ΔΤμαχ wherein the burner at the first time t1 or at a fourth time t4, where the absolute value of the regulatory deviation difference ΔT (t) reaches or exceeds a regulation deviation first threshold Δµ time ten. In this way, a large excess of the set value TSoll can be avoided, when the burner is switched off when the control deviation exceeds the control deviation limit value ΔΤμαχ- The amplitude deviation of the control deviation can then be further limited by temperature values. In this way, high temperature amplitudes can be avoided even when the disconnection integral has not yet reached or 11 has exceeded the first threshold value SW1, e.g. subject to a rapid rise in temperature, although a very high control deviation occurs. Thus, high temperature amplitudes, e.g. in case of a lack of volume flow of the thermal storage medium is avoided in a heating system.

Analogously, another control deviation threshold value ΔΤΜαχ; 2 can preferably be set in a further process step of the method, such that the burner is not only switched on when the switching integral reaches the second threshold SW2, but also preferably at a control deviation where the actual boiler temperature setting temperature is lower Tsoll with more than ΔΤΜαχ; 2-

The method of the invention further preferably comprises the step of defining a temperature range around the boiler temperature setpoint TSoll by setting a first temperature range value T-ι greater than the boiler temperature setting value TSoll and a second temperature range value T2 less than the boiler temperature setting value Tsoll. wherein the disconnection integral Iab (T) is preferably determined only when the determined instantaneous actual boiler temperature value T | St is greater than the first temperature range value T1; and / or where the connection integral lzu (t) is preferably determined only when the determined instantaneous actual boiler temperature value T | St is less than the other temperature range value T2. Thus, around the boiler temperature setting value Tsoll, a so-called dead zone with a temperature width of e.g. 1 K (i.e., T-ι nT2 = 1 K), where neither a coupling nor disconnection integral is formed when the control deviation ΔΤ or the amplitude of the regulation deviation ΔΤ are so small that the actual boiler temperature value T | St oscillates or is within the dead zone. As long as T | St is within the dead zone, the integration is preferably not performed or stopped. This prevents the burner from being switched on and off when the actual boiler temperature value T! St only swings slightly, namely in the dead zone, around the boiler temperature setting value Tsoll · In this way, unnecessary switching on and off of the burner can be prevented.

Preferably, hereby, in integrating with the integral formation of the disconnection integral 12, a first temperature parameter is integrated, depending on the determined control deviation difference, which deviates from the determined regulatory deviation difference with a first constant temperature difference, especially preferably corresponding to the difference between the first temperature setting value and the TS value. and, preferably, is further integrated by the integration for integral formation of the coupling integral via a different temperature parameter, depending on the established control deviation difference, which differs from the established control deviation difference with another constant temperature difference, especially preferably corresponding to the difference between the boiler temperature value and the T

The method of the invention further preferably comprises the method step of resetting the determined shutdown integral Ιαβ (ϊ) to the value of zero when the actual boiler temperature value Tist is below the boiler temperature setting value TSoll on switched on burner.

By regulating the burner in modulated operation (eg in winter), the boiler temperature may possibly fall below the set value Tsoll, even when the burner adds heat to the boiler. If the boiler temperature then rises slightly above the set point and may fall again shortly thereafter, etc., a cumulation of these small control deviations without resetting the disconnect integral to the value may possibly cause a certain disconnection integral to reach the threshold SW-ι, even if disconnection of the burner cannot recommended. Such a disconnection of the burner can be avoided by resetting the disconnection integral to zero when the boiler temperature falls below the set value or the first temperature range parameter T-i when the burner is in operation. In the following, the device according to the invention is described for controlling the running time of a burner suitable for supplying heat to a boiler which is suitable for carrying out the method according to the invention. This does not go into detail with the advantages as they correspond to the advantages of the method. 13

A device according to the present invention for regulating the run time of a burner comprises: • a boiler temperature setting value setting means for setting a boiler temperature setting value Tsoll indicating a setting value for the boiler temperature, • an actual boiler temperature value detecting means for continuous or repeated an instantaneous actual boiler temperature value Tistj indicating an instantaneous temperature in at least a portion of the boiler volume, for determining the actual boiler temperature value Tisi (t) as a function of time t, • a control deviation determination means for continuous or repeated determination of a momentary regulatory deviation difference ΔΤ, difference between the set boiler temperature setting value TSoll and the determined instantaneous actual boiler temperature value Tistj to determine the control deviation difference ΔΤ (ΐ) as a function of time t, • a burner control means for switching on and off the burner.

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 depending on the control deviation ΔΤ (ί) over time t.

According to the invention, the control deviation integral determination means preferably determines a decoupling integral Ιαβ (ϊ) when the actual boiler temperature value T! St is greater than the boiler temperature setting value Tsoll Burner is preferably decoupled by the burner control means t1; where the value lAB (ti) of the disconnection integral ΙΑβ (ϊ) reaches a first threshold value SWi, to terminate the supply of heat via the burner. The control deviation integral determining means further preferably determines a switching integral lZu (t) when the actual boiler temperature value T | St is less than the boiler temperature setting value Tsoll and the burner is preferably switched on by the burner control means at another time t2 t) reaches a second threshold SW2, to supply heat to the boiler via the burner. 14

The device according to the invention preferably further comprises a threshold setting means for setting the first threshold SW-1.

The control deviation integral determinant preferably determines the decoupling integral ΙΑβ (ϊ) by integral formation, depending on the control deviation ΔΤ (ί) until a third time t3, where the actual boiler temperature value T | the second threshold value SW2 corresponding to the value Ιαβ (Ϊ3) of the disconnection integral Ιαβ (ϊ) at the third time t3 such that the second time t2 is preferably the time when the absolute value of the connection integral lZu (t) reaches or exceeds the disconnection integral ΙΑβ ( ϊ) absolute value at the third time t3.

The device for controlling a burner run time preferably further comprises a regulating deviation limit setting setting means for setting a regulating deviation threshold value ΔΤΜαχ, wherein the burner preferably at the first time ten or at a fourth time t4, where the absolute value of the regulation deviation difference ΐΤ or ΔΤ control deviation limit value ΔΤμαχ, is decoupled before the first time ten of the burner control means.

Preferably, the control deviation threshold value setting means is also suitable for setting a second regulation deviation threshold value ΔΤΜα således;

Preferably, the device according to the invention further comprises a temperature range defining means for defining a temperature range around the kettle temperature setting value TSoll by setting a first temperature range value T1; preferably greater than the boiler temperature setting value TSoll, and another temperature range value T2, preferably less than the boiler temperature setting value TSoll, where the disengagement integral Iab (T) is preferably determined only by the control deviation integral determination means when the determined torque factor is determined. the peraturation value T \ Sj is greater than the first temperature range value and the connection integral lZu (t) is preferably determined only by the control deviation integral determining means when the determined instantaneous boiler temperature value T | St is less than the second temperature range value T2.

Preferably, the integration of the disconnection integral integrates hereby via a first temperature parameter, depending on the determined control deviation difference, which deviates from the established regulatory deviation difference with a first constant temperature difference, especially preferably corresponding to the difference between the first temperature range value "TS and preferably, furthermore, by integrating for integral formation of the coupling integral via a different temperature parameter, depending on the determined control deviation difference, which differs from the established regulatory deviation difference with another constant temperature difference, preferably preferably corresponding to the difference between the boiler temperature value and the second temperature setting value.

The device according to the invention preferably further comprises an integral reset means for resetting to the value of zero of an integral determined by the control deviation integral determining means, wherein the integral resetting means preferably returns the determined switching integral Ialβ (ϊ) when | St falls below the boiler temperature setpoint TSoll when the burner is turned on. The integral reset means may also preferably be suitable for already resetting the determined shutdown integral ΙΑβ (ϊ) to zero when the actual boiler temperature value T | St falls below the first temperature range value T-ι when the burner is turned on.

Brief description of the figures

FIG. 1 shows a process for an actual boiler temperature value Tist as a function of time t according to the two-point control method with known hysteresis technique and the corresponding course of the burner power Per as a function of time t. 16

FIG. 2 shows a schematic representation of the burner, the boiler and the burner control device according to an embodiment of the present invention.

FIG. 3A and FIG. 3B is a diagram of a method of controlling a burner according to a first embodiment of the present invention.

FIG. 4A, FIG. 4B and FIG. 4C shows a diagram of a method of controlling a burner according to another embodiment of the present invention.

FIG. 5 shows a process for an actual boiler temperature value Tist as a function of time t according to another embodiment of the present invention and the associated course of burner power PBr as a function of time t.

FIG. 6 shows a section of a diagram according to a third embodiment of the present invention and the corresponding course of the burner power PBr as a function of time t.

FIG. 7 is a schematic representation of one embodiment of the burner control device of the present invention.

DETAILED DESCRIPTION OF THE FIGURES AND PREFERRED EMBODIMENTS OF THE INVENTION In the following, the present invention is described in detail by means of the exemplary embodiments of the burner control method of the present invention and an embodiment of a burner control device of the present invention by means of figures.

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 suitable for supplying heat to a thermal storage medium, e.g. water or oil, in the boiler 20, where the burner 10 is controlled by the burner 30 for controlling a burner 10.

The boiler 20 is here e.g. an independent boiler, e.g. a water heater, or a boiler connected to a heating system, e.g. in a building. At the burner 10, e.g. be it a gas or oil burner. However, a control method according to the invention is not limited to regulation 17 of gas or oil burner and can generally be used with any device suitable for being turned on and off for periodically supplying heat to a boiler.

FIG. 3 shows a diagram of a method for controlling a burner according to a first embodiment of the present invention. The method comprises the steps S31 setting the boiler temperature setting value TSoll, S32 switching on the burner 10, S33 supply of heat, S34 determining the actual boiler temperature value T | ST (t), S35 determining the control deviation difference ΔΤ (ί), S36 determining the disconnection β ϊ), S37 disconnecting burner 10, and S38 determining connection integral lzu (t). In step S31, setting the boiler temperature setting value TSoll, setting a boiler temperature setting value, by means of which the control of the burner 10 is carried out according to the control method of the present invention. The following describes the method of controlling a burner 10 by a one-time boiler temperature setting value TSoll. However, the present invention is not limited to the one-time boiler temperature setting value TSoll. A new boiler temperature setting value TSoll can be set as needed. In step S32, the burner 10 is switched on, the disconnected burner 10 is switched on to supply heat energy to the boiler 20 in step S33.

Further, in step S34, determination of the actual boiler temperature value Tis-r (t) boiler temperature as a function of time t is determined. For this, an instantaneous boiler temperature or the instantaneous boiler temperature value Tist is determined either continuously or repeatedly or periodically. By continuously determining the boiler temperature, the actual boiler temperature value Tist can be determined directly as a function of time t. If the actual boiler temperature value T | St is determined repeatedly or periodically, e.g. always after the expiry of a set time interval At, the actual boiler temperature value Tist is determined as the step function of time t. The actual boiler temperature value Tist is determined here by the fact that an integral formation is possible by integrating the actual boiler temperature value T | St with time t. Step S35 Determining the Regulatory Deviation Difference AT (t) determines the regulatory deviation difference between the actual boiler temperature value Tist and the boiler temperature setting value Tsoll: ΔΤ = Tsoll DTisr. whereby the control deviation difference ΔΤ (ί) as a function of time t can be formed from the actual boiler temperature value Tιδτ (ΐ) as a function of time t and the boiler temperature setting value TSou_: ΔΤ (ί) = Tsoll QTisr (t).

When heat is applied, the actual boiler temperature value rises above the boiler-temperature setpoint Tsoll at a time two. If it is now determined that the actual boiler temperature value exceeds the boiler temperature setpoint, then step S36 determines the disconnection integral I ab (t) and the disconnection integral Ιαβ (ϊ): ί = Jl Δ7Ί dz

If the actual boiler temperature value Tist is determined periodically after each time interval At, the disconnect integral can be determined as the sum of the determined values (step function values) multiplied by Δί (determination of a surface during a step function).

Thus, the decoupling integral Ιαβ (ϊ) is determined by integrating the control deviation difference ΔT (t) over time t when the actual boiler temperature value Tist is above the boiler temperature setting value Tsoll. Since, by the above definition of the regulation deviation difference ΔΤ, a boiler setting temperature is determined negative. determining the disconnection integral Ιαβ (ϊ) the absolute value of the control deviation difference AT (t) to determine a positive disconnection integral Ιαβ (ϊ). However, the present invention is not limited to this determination of the disconnection integral Ιαβ (ϊ) and can also be determined without forming an absolute value, possibly by simultaneously adjusting the signs of threshold values. 19 At a time ten, the determined disconnection integral Ιαβ (ϊ), which also shows a function of time t, rises a set first threshold value SW 1, so that it is determined according to the invention that the burner 10 must be stopped at time ten, since the determined disconnection integral IAb thus, at this time ti has reached or exceeds the threshold SW ^ Contrary to the two-point control method described above with hysteresis, burner 10 is not switched off when the actual boiler temperature value T | St exceeds a maximum value TMax, but when the determined switch-off integral IAb is determined. the regulation deviation difference ΔΤ reaches or exceeds a threshold value SWi.

This, according to the invention, causes the burner to be switched off at step 10 in step S37, so that the burner 10 is fed to the boiler 20, the burner 10 being switched off. Then the boiler temperature drops as heat is no longer supplied to the boiler 20 via the burner 10.

If at a time T0 'the boiler temperature falls below the set boiler temperature setting value TSoll, the control deviation ΔΤ is again integrated to determine the connection integral lzu (t) in step S38 to form a connection integral. Since the control deviation ΔΤ at boiler temperatures below the boiler temperature setting value Tsoll is positive according to the above definition, when determining according to the invention the coupling integral Izu according to the first embodiment of the invention, the formation of an absolute value: t

Izu (t) = | ΔΓ dr

However, it may be necessary to perform an absolute value when there is another definition of the control deviation ΔΤ or the threshold values (eg negative threshold values). As long as the boiler temperature is below the boiler temperature setting value Tsoll, the determined value of the connection integral lzu (t) rises and at some point t2 reaches another threshold value SW2. It is now determined that the switching integral lZu (t) reaches or exceeds the second threshold value SW2, the burner in step S32 is switched on again by the burner to again supply heat to the boiler 20. According to the presently described embodiment of the method for controlling a burner 10. in FIG. 3, steps S32 to S38 are cyclically repeated so that the burner is cyclically engaged when the determined switching integral lzu (t) reaches or exceeds the second threshold value SW2 to in each case be switched off when the determined switching integral Ιαβ (ϊ) rises threshold S \ Ni.

A preferred second embodiment of the burner 10 control method of the present invention is shown in the diagram of FIG. 4. According to the preferred second embodiment of the method of the present invention, the method comprises the steps S401 setting the boiler temperature setting value Tsoll, S402 setting the first threshold SW-ι, S403 setting the temperature range (dead zone), S404 setting the setting deviation limit SΤΜΤΜ5, switching on the burner, S406 supply of heat, S407 determining the actual boiler temperature value T | ST (t), S408 determining the control deviation difference ΔΤ (ί), S409 determining the switching integral ΙΑβ (ϊ), S410 switching off the switching cutter 10, S410 Ιαβ (ϊ) and S412 determination of the coupling integral lzu (t). In step S401, setting the boiler temperature setting value TSoll is set analogously to step S31 in fig. 3 shows a boiler temperature setting value TSoll - In step S402 setting the first threshold value SW-ι a first threshold value SW-ι is set which, analogously to the embodiment of FIG. 3 shows a threshold value for the disconnection integral Ιαβ (ϊ), to show from which value of the disconnection integral Ιαβ (ϊ) the burner 10 according to the invention must be disconnected. In step S403 defining the temperature range (dead zone), a temperature range is defined around the set boiler temperature setting value TSoll by setting eb first temperature range value Ti greater than the kettle temperature setting value TSoll and setting a second temperature range value T2 less than the set boiler temperature setting value Tsoll · Here, step S403 defining the temperature range, or the so-called dead zone, can be performed, setting the first and second temperature range values Ti and T2 individually, or setting a half-width of the dead zone such that the first temperature range value Ti and the second temperature range value T2 are each above or below the set boiler temperature setpoint TSoll with half the dead zone value. In step S404 setting the control deviation limit value ΔΤΜαχ, a maximum regulation deviation threshold value ΔΤΜαχ is set to limit large temperature amplitudes or large temperature fluctuation of the boiler temperature around the boiler temperature setting value Tsoll in addition to limiting the on and off auxiliary integrals.

This means that the burner 10 is optionally switched on or off when the control deviation ΔΤ exceeds the set regulation deviation limit value ΔΤ-max, even if a certain switching on or off integral has not yet reached the first or second threshold value. Optionally, two different control deviation limit values can also be set to limit a regulation deviation above and / or below the threshold independently.

The method of the second embodiment of the present invention further comprises, as shown in FIG. 3, the steps S405 connecting the burner and S406 supplying heat analogously to the steps S32 and S33 in FIG. Third

Analogously to steps S34 and S35 in FIG. 3 comprises the method of FIG. 4 further, the steps S407 determine the actual boiler temperature value Tis-r (t) and S408 determine the control deviation difference ΔΤ (ί). Both the actual boiler temperature value T | St and the control deviation difference ΔΤ are determined analogously to the method of FIG. 3 as a function of time t.

When heat is applied, the boiler temperature first exceeds the boiler temperature setting value Tsoll and then shortens the first temperature range value Ti such that the control deviation difference ΔΤ becomes less than the difference Tsoll nTi. At this point tAb, determination of the disconnect integral IΑβ (ϊ) begins in step S409 determination of the disconnect integral ΙΑβ (ϊ). In contrast to the previously described embodiment of the method of FIG. 3, where the shutdown integral Ιαβ (ϊ) was determined from a time t0 where the boiler temperature exceeds the boiler temperature setting value TSoll, in this embodiment, the shutdown integral Ιαβ (ϊ) is determined according to the method from a time tAb leaving the boiler temperature or the defined temperature range, , around the boiler temperature setting value Tsoll: in lAB (t) = 1 \\ AT (t) \ - (Ti-TS0 +)] dr τΑΒ

Further, by integrating into this embodiment, as shown in the foregoing formula, a surface area is formed during the time course of the actual boiler temperature value Tist up to the first temperature range value T1; so that a surface between the temperature range value Ti and the boiler temperature setting value Tsoll is omitted. However, the present invention is not limited to such integral formation and it is possible to provide embodiments of the invention where an integral formation is performed over the entire control deviation ΔΤ, where the integral formation only begins at a time when the actual boiler temperature value Tist leaves the defined temperature range or the dead zone. As long as the boiler temperature, or the actual boiler temperature value Tist, remains above the first temperature range value Ti, the value of the disconnection integral Ιαβ (ϊ) is determined. In step S410, the burner 10 is switched off, the burner 10 is switched off when the value of the disconnection integral Ιαβ (ϊ) reaches or exceeds the set first threshold SW-ι, or if the absolute deviation difference ΔΤ of the absolute deviation difference ΔΤ only reaches or exceeds the set maximum deviation difference Δ the burner changes a heat supply from the burner 10 to the boiler 20 so that the boiler temperature begins to drop.

Furthermore, even at disconnected burner, the disconnect integral Ιαβ (ϊ) is determined in step S411 after disconnection of the burner. Hereby, the decoupling integral ΙΑβ (ϊ) is determined at least until a time when the decreasing boiler temperature reaches or falls below the first temperature range value T-ι. Finally, the decoupling integral Ιαβ (ϊ) is further determined up to a time t3, where the actual boiler temperature value T | St reaches or falls below the first temperature range value T-ι. At this point, the determination of the disconnection integral ΙΑβ (ϊ) is terminated and the value ΙΑβ (Ϊ3) determined up to that point is determined as a new value for the second threshold value SW2: Ιαβ (Ϊ3) - SW2.

If the boiler temperature drops further, so that the control deviation difference ΔΤ becomes greater than the difference between the boiler temperature set value TSoll and the second temperature range value T2 at a time tzu, in step S412, determination of the connection integral lZu (t) starts to determine the connection integral lz : t

Izu (t) = 1 [AT (t) - (TS0U-T2))] άτ

If the determined switching integral lZu (t) reaches or falls below the second threshold value SW2, determined corresponding to the value of the switching integral Ιαβ (Ϊ3) at time t3, the burner is reconnected in step S405 to supply heat to the boiler 20 again in step S406. The burner 10 is also switched on by an extended control when the control deviation ΔΤ at decreasing actual boiler temperature value below the set value reaches or exceeds a maximum control deviation ΔΤμαχ, even if the specific switching integral lZu (t) has not reached the second threshold value2

Steps S405 to S412 are repeated cyclically so that the actual boiler temperature value Tist swings around the boiler temperature setpoint Tsoll ·

By determining the second threshold value SW2 = Ιαβ (Ϊ3), it can be ensured that the boiler is under-supplied to a degree in a cycle to the same extent as it was just before supplied with heat energy. The reason for this is that, from time loss to time ten, the disconnection integral substantially corresponds to the value of the input heat energy which is too much, and it is ensured that the burner in the cycle remains disconnected until an analog-generated switching integral reaches the same value as the just before the disconnection integral formed, which is substantially 24 corresponding to an over-supply of heat energy. Thus, within a cycle it is ensured that the boiler is neither over- or under-supplied.

FIG. 5 shows a burner cycle regulated according to the burner control method according to FIG. 4 illustrates the second embodiment of the present invention. FIG. Figure 5 shows the boiler temperature temperature trend as a function of time t and the corresponding burner power PBr time function as time t. The boiler temperature setpoint value Tsoll is shown by a horizontal line. Above and below the set setting value Tsoll, two additional horizontal lines are defined defining the dead zone or defined temperature range around the boiler temperature setting value TSoll and showing the first and second temperature range values Ti and T2. A further horizontal line also shows the set maximum control deviation ΔΤΜαχ · At a point t0 the burner 10 is switched on, shown by the increase of the burner power at time t0 (S405). The boiler temperature rises due to switching on the burner 10 and reaches or exceeds the boiler temperature setting value TSoll and then shortly at a point tAb the first temperature range value At this point tAb the determination of the disconnection integral IΑβ (ϊ) begins in step S409. At a time ten, the determined value of the disconnection integral lAB (t) reaches the set first threshold value SW1; so that the burner is switched off at this time ten, shown by the decrease of the burner power PBr at time ten (S410).

The disengagement integral lAB (t) is further determined in step S411 until the actual boiler temperature value T | St at a time t3 reaches and falls below the first temperature range value. The shaded surface during the course of the boiler temperature as a function of time t between the time loss and t3 is equal to the value of the disconnect integral lAB (t3) at time t3. This value is set as the new second threshold value SW2 for the next connection integral lzu (t) to be determined.

After time t3, the boiler temperature drops further by switching off burner 10 until shortly thereafter it falls below the defined dead zone, ie. 25 below the first temperature range value T2. At this point tZu, the determination of the connection integral lzu (t) begins in step S412. At a time t2, the value of the connection integral Izu (t2) reaches the second threshold value SW2 = I ab (ta) j such that the burner 10 is reconnected at time t2 in step S405. Off and on integral values so far determined and / or the second threshold value SW2 are reset so that a further burner cycle can be performed again by the control method of the present invention according to the second embodiment.

FIG. 6 shows the operation of the set control deviation maximum value Δ Tmax. The boiler temperature increases after switching on burner 10 at a time t0. At a time t2, the boiler temperature exceeds the first temperature range value Ti and the determination of the disconnection integral Ιαβ (ϊ) begins. The control deviation increases so rapidly after switching on the burner 10 that the boiler temperature T \ Sj reaches a value at a time t4, where the absolute sum of the determined instantaneous control deviation ΔΤ (ί4) reaches the set regulation deviation maximum value ΔΤΜαχ-

Following the second embodiment of the burner control method of the present invention, the burner is switched off at this time t4, although at this time t4, the value of the disconnection integral (lab) has not yet reached or exceeded the first threshold value SW temperature amplitudes by a rapid increase or decrease in boiler temperature are also avoided by the method according to the invention, in which the switching on and off of the burner is determined by the determination of switch-off and switching integrals, limiting the control deviation in addition to the established control deviation integrals, ie. if the boiler temperature setting value TSoll is very much exceeded, the burner is also switched off, possibly independently of the determined switch-off integral.

Further, in the control method of a burner according to the second embodiment of the present invention, a temperature range, or a dead zone (e.g., 1 K) is defined, thereby forming neither 26 nor disconnection integrals within the dead zone. Thus, within this dead zone, integration is halted. In a further exemplary embodiment of the method of controlling a burner of the present invention, the decoupling integral Iβ (ϊ) value is also reset when the boiler temperature setting value T | St falls below the boiler temperature setting value TSoll when the burner is in operation. In this case, the shutdown integral is reset to zero or the time when the actual boiler temperature value T! St again exceeds the boiler temperature setpoint TSoll is used as a new start time to determine the shutdown integral Ιαβ (ϊ). In this way, a long-running burner in modulating operation can be avoided by cumulation of minor control deviations. In modulating operation, a small fluctuation of the boiler temperature may also occur within the defined dead zone, in which, according to the second embodiment of the present invention, no switch-off and switch-on integrals are also formed. Thus, for small control deviations within the dead zone, there is no cumulation in determining the disconnection or switching integrals, so that small control deviations within the dead zone cannot lead to unnecessary or unwanted switching on and off of the burner 10.

FIG. 7 shows a device for controlling a burner according to an embodiment of the present invention suitable for carrying out at least one of the methods according to the invention of the above-described exemplary embodiments of the invention. Device 30 for controlling burner 10 according to an embodiment of the present invention comprises a boiler temperature setting value setting means 31, an actual boiler temperature value detecting means 32, a control deviation determining means 33, a burner control means 34, a control deviation integral determining means 35, a threshold adjusting means 36, a control deviation limit value setting means 37 and a temperature range defining means 38.

The boiler temperature setting value setting means 31 is suitable for setting 27 a boiler temperature setting value, i.e. the boiler temperature setting value TSoll described above for controlling burner 10.

The actual boiler temperature value detecting means 32 is suitable for detecting the instantaneous value of the boiler temperature, i.e. the actual boiler temperature value T | St in at least a portion of the boiler. The actual boiler temperature value detecting means 32 comprises at least one means for measuring the boiler temperature in an area of the boiler or a plurality of means for detecting boiler temperatures at different locations of the boiler, where the actual boiler temperature value detecting means 32 is possibly suitable for detecting and further -work the boiler temperature values determined by the plurality of agents, optionally by weighted or unweighted averaging, to determine an actual value Tist-

Furthermore, the boiler temperature value detecting means 32 is capable of detecting the actual value of the boiler temperature continuously or repeatedly or periodically. In this way, the boiler temperature T | St can be detected as a function of time t.

The control deviation determination means 33 is suitable for determining a control deviation ΔΤ between the set boiler temperature setting value TSoll and the instantaneously detected actual boiler temperature value T | St- For this, the regulation deviation determining means 33 is at least a difference between

The control deviation integral determining means 35 is suitable for integrating the control deviations ΔΤ (ΐ) determined continuously or repeatedly by the control deviation determining means 33, over time t, to determine integrals depending on the control deviation and / or to form the absolute value of a particular integral over time t.

The burner control means 34 is suitable for switching on and off the burner 10 from the determined switching on and off integrals determined by the control deviation integral determining means 35.

The temperature range defining means 38 is suitable for defining a temperature range 28, or a dead zone, around the set boiler temperature setting value TSoll. The temperature range defining means 38 is suitable for setting a first temperature range value T-ι greater than the boiler temperature setting value TSoll. and another temperature range value T2 less than the boiler temperature setting value TSoll, oils to define a temperature range around the boiler temperature setting value TSoll by setting a temperature range half-width defining half the width of the temperature range to be defined, where the boiler temperature setting value TSoll lies in the center of the defined temperature range. The threshold setting means 36 is suitable for setting a first threshold value SW-ι and / or second threshold value SW2 as threshold values for the determined on and off integrals determined by the control deviation integral determination means 10, the burner control means 35. a determined disconnection integral ΙΑβ (ϊ) reaches or exceeds the first threshold value SW1; and disabling burner 10 when a switching integral lzu (t) determined by the control deviation integral determining means 35 reaches or exceeds the second threshold value SW2.

The control deviation limit value setting means 37 is suitable for setting a maximum value of the control deviation as a control deviation limit value ΔΤmax, so that large temperature amplitudes can be avoided, the burner control means 33 decoupling or decoupling the deviation when the deviation deviation Δ is switched off or off the set control deviation threshold value ΔΤmax, for a switching on or off integral determined by the control deviation integral determining means 35, reaches or exceeds a set threshold value.

Finally, the burner 10 control device 30 further comprises an integral reset means 39 intended to set an integral determined by the control deviation integral determiner 35 to the value zero when the actual boiler temperature value T | St enters the defined temperature range (dead zone), especially when the actual boiler temperature value Tist falls back to the defined temperature range when the burner is turned on. By virtue of the above-described exemplary embodiments of the method of controlling a burner 10 of the present invention and the described preferred embodiment of a device for regulating a burner 10 of the present invention, a considerable optimization of the control of a burner is possible when the burner clocked under a minimally modular burner power. It enables a significant increase in burner run times, thereby avoiding dynamic loads due to the boiler temperature fluctuation and combustion in the burner with less emission.

By determining the second threshold value SW2 from the determined shutdown integral Ιαβ (ϊ) until a time when the boiler temperature at the cut-off burner falls below the set setting value TSoll, it is possible for the boiler or a heating system connected to the boiler to a building at standstill by the burner is under-supplied to the same extent as it was over-supplied in the same cycle shortly before. Thus, over average time, over- or under-supply with heat energy is avoided. thus, according to the invention, there is provided a control method of a burner whereby loss of comfort for a user is avoided. The over and under supply, which occurs only for a short time within the cycle, can be offset by the inertia on the consumer side.

Furthermore, it is possible that a desired behavior (long run times or low temperature amplitudes desired) can be easily set via a single parameter (eg the first threshold SW-ι) when the second threshold SW2 is determined for the switching integral from the previously determined switching integral .

The method according to the invention is hereby suitable both for gas and oil burners, as well as for additional burner types which are rated for loads under a minimally modulable burner effect. The method is suitable for heating systems for all types of building plumbing temperatures and gives a high robustness due to the integral operation, after the burner's switch-off and switch-on times are determined in a cycle not from rigid temperature limits but from an integral of the control deviation over time t.

Claims (11)

1 A method for controlling the run time of a burner (10) suitable for supplying heat to a boiler (20), the method comprising the process steps: - setting (S31; S401) of a boiler temperature setting value Tsoll indicating a boiler temperature setting value, - supply (S33; S406) of heat through the burner (10) to the boiler (20), - continuous or repeated detection (S34; S407) of an instantaneous actual boiler temperature value T | St which depends on an instantaneous temperature of at least a portion of the boiler volume, for determining the actual boiler temperature value Tis-r (t) as a function of time t, - continuous or repeated determination (S35; S408) of an instantaneous control deviation difference ΔΤ indicating a difference between the boiler temperature setpoint value TSoll and the determined instantaneous actual boiler temperature value T | St, to determine the control deviation difference ΔΤ (ΐ) as a function of time t, - determine estimation (S36; S409, S411) of a decoupling integral Ιαβ (ϊ) by integral formation, depending on the control deviation difference ΔΤ (ΐ) over time t, when the actual boiler temperature value T | St is greater than boiler temperature setting value TSoll, - decoupling (S37; S410) of the burner (10) at a first time ti, where the value Ιαβ (ϊ-ι) of the disconnection integral lAe (t) reaches a first threshold value SW1; to terminate the supply of heat via the burner (10), - Determination (S38; S412) of an integral integral lZu (t) by integral formation depending on the control deviation difference ΔΤ (ί) over time t when the actual boiler temperature value T | St is less than boiler temperature - setting value Tsoll, and - switching on (S32; S405) of the burner (10) at another time t2, where the value Izu (t2) of the switching integral lzu (t) reaches a second threshold SW2, to supply heat to the boiler (20) via the burner (10), characterized in that the decoupling integral IΑβ (ϊ) is determined until a third time t3, where the actual boiler temperature value T | Sr (t) reaches or falls below the boiler temperature setting value TSoll or a predetermined first temperature range value T-ι after disconnection of the burner (10) where the second threshold value SW2 is determined corresponding to the value Iab ^) of the disconnect 2 integral ΙΑβ (ϊ) at the third time t3, so that the second time t2 is the time when the absolute value | Zu (t) | of the coupling integral lZu (t) reaches or exceeds the absolute value | Ιαβ (ϊ3) | of the disconnection integral Ιαβ (ϊ) at the third time t3. Method according to claim 1, characterized in repeated execution of the steps supply (S33; S406) of heat, determination (S36; S409, S411) of the disconnection integral ΙΑβ (ϊ), disconnection (S37; S410) of the burner (10), determination (S38; S412) of a connection integral lZu (t) and connection (S32; S405) of the burner (10). Method according to claim 1 or 2, characterized by the further method step setting (S402) of the first threshold SW Method according to at least one of claims 1 to 3, characterized by the method step setting (S404) of a control deviation limit value ΔΤμαχ, wherein the burner (10) at the first time ten or at a fourth time t4, where the absolute value | ΔΤ (ί4) | of the regulatory deviation difference ΔΤ (ί) reaches or exceeds a regulatory deviation threshold value ΔΤμαχ, disconnected before the first time t-i. Method according to at least one of claims 1 to 4, characterized by the method step defining (S403) a temperature range around the boiler temperature setting value Tsoll by setting a first temperature advisory value T1; greater than the boiler temperature setting value Tsoll and another temperature range value T2 less than the boiler temperature setting value Tsoll, where the disconnection integral lAe (t) is determined only when the determined instantaneous actual boiler temperature value T! is greater than the first temperature range value T-ι and where the connection integral lzu (t) is determined only when the determined instantaneous actual boiler temperature value Tist is less than the other temperature range value T2. 3 Method according to at least one of claims 1 to 5, characterized by the further process step resetting the determined shutdown integral Ιαβ (ϊ) to the value when the actual boiler temperature value Tist falls below the boiler temperature setting value TSoll at switched burner (10). Device for controlling the run time of a burner (10) suitable for supplying heat to a boiler (20) with: - a boiler temperature setting value setting means (31) for setting a boiler temperature setting value Tsoll which indicates a boiler temperature setting value, - an actual boiler temperature value detecting means (32) for continuously or repeatedly detecting an instantaneous actual boiler temperature value T! St, indicating an instantaneous temperature in at least a portion of the boiler volume, for determining the actual boiler temperature value T! ST (t) as a function of time t, - a control deviation determination means (33) for the continuous or repeated determination of an instantaneous regulatory deviation difference ΔΤ indicating a difference between the set boiler temperature setpoint Tsoll and the determined instantaneous boiler temperature value T | St the regulation deviation difference AT (t) as a function of time t a burner control means (34) for switching on and off the burner (10), - a control deviation integral determining means (35) for determining an integral by integral formation depending on the control deviation AT (t) over time t, where the control deviation integral determining means (35) ) determines a decoupling integral Ιαβ (ϊ) when the actual boiler temperature value T | St is greater than the boiler temperature setting value Tsoll, the burner control means (34) disconnects the burner (10) at a first time ti where the value lAB (ten) of the decoupling integral ΙΑβ ) reaches a first threshold SW1; to terminate the supply of heat via the burner (10), the control deviation integral determinant (35) determines a coupling integral lzu (t) when the actual boiler temperature value T | St is less than the boiler temperature setting value TSoll, and the burner control means (34) ) at another time t2, where the value Izuife) of the connection integral lZu (t) reaches a second threshold value 4 SW2, to supply heat to the boiler (20) via the burner (10), characterized in that the control deviation integral determining means (35) determines the decoupling integral Iαβ (ϊ) upon integration until a third time t3, where the actual boiler temperature value T | St reaches or falls below the boiler temperature setting value TSoll or a first temperature range value Ti after disconnection of the burner (10) and the burner control means (34) determines the second threshold value corresponding to the value Ub ^) of the disconnection integral Ιαβ (ϊ) at the third time point unique t3 such that the second time t2 is the time when the absolute value | lzu (t) | of the coupling integral lZu (t) reaches or exceeds the absolute value | Ιαβ (Ϊ3) | of the disconnection integral IΑβ (ϊ) at the third time t3. Device according to claim 7, characterized by a threshold setting means (36) for setting the first threshold SW Device according to claim 7 or 8, characterized by a control deviation limit value setting means (37) for setting a regulation deviation limit value ΔΤΜαχ, wherein the burner (10) at the first time ti or at a fourth time t4, where the absolute value | ΔΤ (t4 ) | of the control deviation difference ΔΤ (t) reaches or exceeds a regulatory deviation threshold value ΔΤΜαχ, is deactivated before the first time ten by the burner control means (34). Device according to at least one of claims 7 to 9, characterized by a temperature range defining means (38) for defining a temperature range around the boiler temperature setting value Tsoll by setting a first temperature range value T1; greater than the boiler temperature setting value Tsoll and another temperature range value T2 less than the boiler temperature setting value TSoll, where the decoupling integral ΙΑβ (ϊ) is determined only by the control deviation integral determining means (35) when the determined instantaneous boiler temperature value is greater than the first temperature range value T1; and the switching integral lZu (t) is determined by the control deviation integral determining means (35) only when the determined instantaneous actual boiler temperature value T \ Sj is less than the second temperature range value T2. Device according to at least one of claims 7 to 10, characterized by an integral resetting means (39) for resetting to the zero value of an integral determined by the control deviation integral determining means (35), wherein the integral resetting means (39) places it determined shutdown integral ΙΑβ (ΐ) back to the value zero when the actual boiler temperature value Tist falls below the boiler temperature setpoint TSoll at connected burner (10).