EP0740111B1 - Heizgerät und Verfahren zur Regelung eines Heizgerätes - Google Patents
Heizgerät und Verfahren zur Regelung eines Heizgerätes Download PDFInfo
- Publication number
- EP0740111B1 EP0740111B1 EP95120753A EP95120753A EP0740111B1 EP 0740111 B1 EP0740111 B1 EP 0740111B1 EP 95120753 A EP95120753 A EP 95120753A EP 95120753 A EP95120753 A EP 95120753A EP 0740111 B1 EP0740111 B1 EP 0740111B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- exhaust
- burner
- gas
- exhaust gas
- control unit
- 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.)
- Expired - Lifetime
Links
- 238000010438 heat treatment Methods 0.000 title claims description 23
- 238000000034 method Methods 0.000 title claims description 23
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 80
- 238000002485 combustion reaction Methods 0.000 description 9
- 238000012546 transfer Methods 0.000 description 8
- 239000008236 heating water Substances 0.000 description 5
- 230000001419 dependent effect Effects 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 230000010512 thermal transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- F24H9/0005—Details for water heaters
- F24H9/0036—Dispositions against condensation of combustion products
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/003—Systems for controlling combustion using detectors sensitive to combustion gas properties
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
- F23N5/022—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using electronic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2225/00—Measuring
- F23N2225/08—Measuring temperature
- F23N2225/10—Measuring temperature stack temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2225/00—Measuring
- F23N2225/08—Measuring temperature
- F23N2225/12—Measuring temperature room temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2225/00—Measuring
- F23N2225/26—Measuring humidity
Definitions
- the invention is based on a control method a heater according to the type of the main claim, and from a heater to perform the procedure.
- Heat exchangers are known from EP 0 184 612 B2 provided with a special protective layer and thus against the acid generator contained in the condensate of the exhaust gases are stable.
- chimneys as exhaust gas routing offers the possibility of glazing fireclay inner tubes, flexible or rigid stainless steel tubes or too Insert plastic pipes so the chimneys are insensitive to exhaust gas condensate.
- the control method according to the invention with the features of Claim 1 has the advantage that if necessary intended increase in burner output Condensate formation in the exhaust system with minimal Use of energy is prevented.
- the dependence of the burner output setpoints on the by a temperature sensor arranged in the exhaust gas path recorded exhaust gas temperatures and from the exhaust gas routing is in advantageously by in a control unit stored characteristic curve determined. This ensures that during operation of the heater at any exhaust gas temperature a necessary according to the avoidance of condensate Burner output setpoint as the lower limit of the Burner capacity control range can be assigned.
- the characteristic curve is represented by a pre-selectable potentiometer connected to the control unit is.
- the burner output is the same as the one selected Characteristic curve determined burner output setpoints corrected. Because these burner output setpoints are larger as the originally set burner output, the corrected burner output in an advantageous manner a shorter on-time and / or longer off-time balanced the burner. This ensures that Heater does not deliver more heating energy than corresponding the heat requirement is necessary.
- FIG. 1 shows the schematically shown Heater according to the invention for performing the control method according to the invention and FIG. 2 Characteristic field in a burner output / flue gas temperature diagram.
- the heater shown schematically in Fig. 1
- the heater has a burner 10.
- One in one Heating water circuit with a flow 12 and a return 14 arranged heat exchanger 16 is called hot Combustion gases acted on by the burner 10.
- the heating water circuit can be used by consumers e.g. in form of Heating system with space heaters, which in the form of radiant heat transfers the heating energy to the Give environment, or systems for Industrial water supply, for example with the Heating system can be combined.
- An exhaust gas duct 18 is located above the heat exchanger 16 arranged, which are the exhaust gases generated during combustion dissipates to the outside environment. Via a coaxial to Exhaust gas duct 18 arranged line 20 can in the case of the burner 10 Combustion air can be supplied. Depending on the The amount of heat demand becomes the output of the burner 10 preferably continuously regulated between 60% and 100%.
- Control procedure is the minimum necessary exhaust gas temperature determined to the exhaust gas temperature in the course of the exhaust system 18 to hold above the dew point. This was done in Laboratory tests the minimum necessary exhaust gas temperature immediately at the entry of the exhaust gases into the exhaust gas guide 18 determines that no condensate in the entire exhaust system 18th originated.
- the minimum necessary exhaust gas temperature depends on this essentially of the length and diameter of the Exhaust duct 18 and the heat transfer between Exhaust duct 18 and the coaxially arranged line 20th for the supply of combustion air. A long Exhaust duct 18 requires a higher minimum necessary Exhaust gas temperature as a short exhaust gas duct 18.
- Control procedure is carried out with the help of an above Heat exchanger 16, at the entrance of the exhaust gas duct 18 arranged temperature sensor 24, the exhaust gas temperature determined and in one with the temperature sensor 24th connected control unit 22 evaluated. Is the value of the measured exhaust gas temperature below the minimum necessary Exhaust gas temperature, so the according to Burner output set to heat demand increased. A The burner output is corrected until the the minimum necessary exhaust gas temperature has been reached.
- burner output setpoints as the lower limit for the burner output control range Are defined. For example, with one measured exhaust gas temperature of 60 ° C a larger Burner output setpoint necessary to a minimum necessary exhaust gas temperature of, for example, 120 ° C reach than at a currently measured exhaust gas temperature of 90 ° C.
- the Temperature sensor 24 detected exhaust gas temperatures with the compared the minimum necessary exhaust gas temperature. Is that measured exhaust gas temperature below the minimum necessary Exhaust gas temperature, it is according to the Set burner output actual value by means of heat request the burner output setpoint at the corresponding one Exhaust temperature replaced. This ensures that the Exhaust gas temperature not below the dew point during heating of the exhaust gas falls and the exhaust duct 18 is free of Exhaust condensate remains.
- the assignment of the burner output setpoints to the Exhaust gas temperatures is a characteristic curve in the control unit 22 filed.
- the characteristic curve is as shown in FIG. 2, decreasing with increasing exhaust gas temperatures, i.e. there are with increasing burner temperature lower burner output setpoints as the lower limit of the burner output control range possible.
- the control method according to the invention activated.
- Corresponding one by the control unit 22 in cooperation with a Outside temperature sensor determined setpoint for the The heater starts the flow temperature of the heating water Heat the heating water up to the setpoint.
- the Heat demand is the heating output or the Burner output set between 60% and 100%. Is that measured exhaust gas temperature below the minimum necessary Exhaust gas temperature, the actual burner output value is determined by the burner output setpoint according to the characteristic in Control unit 22 corrected or raised.
- these parameters are dependent different burner output setpoints as lower Limit for the burner output control range for one condensate-free exhaust gas routing 18 necessary. That is why for different minimum necessary exhaust gas temperatures different characteristics stored in the control unit 22, the are shown in dashed lines in Fig. 2.
- Exhaust gas guide 18 can be a function of exhaust gas guide 18 selected between the characteristics shown in FIG. 2 become.
- Characteristic 1 is the lower adjustable characteristic in heating systems with a short exhaust system 18 and one low value for the heat transfer between the Exhaust duct 18 and line 20 for the supply of Combustion air selected, while curve 5 as the upper adjustable characteristic with a long exhaust system 18 and a high value for the heat transfer between the Exhaust duct 18 and line 20 for the supply of Combustion air is selected. Between these two Characteristic curves are corresponding fine-tuning with regard to Length of the exhaust duct 18 and the heat transfer through the Characteristic curves 2,3 and 4 possible.
- the setting of those necessary for exhaust gas routing Characteristic curve is made by a potentiometer 26.
- This is connected to the control unit potentiometer 26 so Heater attached that the operator or the Installer of the heating system without any disassembly of the Heater can make the appropriate setting.
- the heating energy supply may be greater than that originally required according to the heat requirement.
- the higher burner output delivered correct that the heating energy supply actually corresponds to the required amount of heat will be shorter Switch-on phases and / or longer switch-off phases of the Burner 10 set by the control unit 22.
- the Switching hysteresis in a two-point control can be how already in DE 39 07 955A described, optimized.
- the exhaust duct 18 determines, i.e. the temperature sensor 24 is arranged inside the heater. of course is it is also possible to use a temperature sensor 24 ' the exhaust gas temperature at the end of the exhaust gas duct 18 determine. This makes the determination of the minimal necessary exhaust gas temperature regardless of the length of the Exhaust gas routing 18. Bring the temperature sensor 24 'to Measurement of the wall temperature at the end of the inner wall of the Exhaust gas guide 18, so will be different Thermal transitions also taken into account. Both points taken together, i.e.
- the application of the standard procedure is not restricted on a heater according to the embodiment, but can be used wherever with one conventional control method to an exhaust gas duct connected heater is operated.
Landscapes
- 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)
Description
Claims (7)
- Verfahren zum Regeln eines insbesondere gas- oder ölbetriebenen Heizgeräts mit einem Brenner, mit einer Abgasführung und mit einem Steuergerät, durch das die Leistung des Heizgeräts in Abhängigkeit von der Wärmeanforderung regelbar ist, sowie mit einem Sensor zur Erfassung der Abgastemperatur, wobei zur Vermeidung von Kondensatbildung in der Abgasführung die Brennerleistung erhöht wird, wenn die gemessene Abgastemperatur unterhalb einer minimal notwendigen Abgastemperatur liegt, die erforderlich ist, um die Abgastemperatur im Verlauf der Abgasführung oberhalb des Taupunktes zu halten, dadurch gekennzeichnet, daß in Bezug auf die Anhebung der Brennerleistung zur Vermeidung der Kondensatbildung dem eigentlichen Regelverfahren folgende Schritte vorangestellt werden:Bestimmung von Brennerleistungs- Sollwerten für das Erreichen der minimal notwendigen Abgastemperatur bei unterschiedlichen Abweichungen der gemessenen Abgastemperatur von der minimal notwendigen Abgastemperatur,Einsetzen der ermittelten Brennerleistungs- Sollwerte als untere Grenze für den Brennerleistungs- Regelbereich.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Brennerleistungs- Sollwerte in Verbindung mit den zugehörigen Abgastemperaturen als Kennlinie(n) im Steuergerät (22) abgelegt werden.
- Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß für unterschiedliche notwendige Abgastemperaturen unterschiedliche Kennlinien im Steuergerät (22) abgelegt werden.
- Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß die für die jeweilige Abgasführung (18) notwendige Kennlinie am Heizgerät oder am Steuergerät (22) einstellbar ist.
- Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß die unterschiedlichen Kennlinien durch ein mit dem Steuergerät (22) verbundenes Potentiometer (26) einstellbar sind.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die korrigierte Brennerleistung durch eine kürzere Einschaltdauer und/oder längere Ausschaltdauer des Brenners (10) ausgeglichen wird.
- Heizgerät mit einem gas- oder ölbetriebenen Brenner, mit einer Abgasführung und mit einem Steuergerät, durch das die Leistung des Heizgerätes in Abhängigkeit von der Wärmeanforderung und in Abhängigkeit von der Temperatur in der Abgasführung regelbar ist, wobei in der Abgasführung (18) des Heizgerätes mindestens ein Temperaturmeßfühler (24, 24') angeordnet ist, zur Durchführung des Verfahrens nach einem der vorhergehenden Ansprüche, gekennzeichnet durch ein mit dem Steuergerät (22) verbundenes Potentiometer (26), mit dem unterschiedliche Kennlinien für Brennerleistungs-Sollwerte zum Erreichen von minimal notwendigen Abgastemperaturen wählbar sind (Figur 2).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19515656A DE19515656A1 (de) | 1995-04-28 | 1995-04-28 | Heizgerät und Verfahren zur Regelung eines Heizgerätes |
DE19515656 | 1995-04-28 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0740111A1 EP0740111A1 (de) | 1996-10-30 |
EP0740111B1 true EP0740111B1 (de) | 1999-06-02 |
Family
ID=7760603
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95120753A Expired - Lifetime EP0740111B1 (de) | 1995-04-28 | 1995-12-30 | Heizgerät und Verfahren zur Regelung eines Heizgerätes |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0740111B1 (de) |
DE (2) | DE19515656A1 (de) |
ES (1) | ES2134402T3 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1030128B1 (de) * | 1997-10-16 | 2003-07-09 | Toyota Jidosha Kabushiki Kaisha | Katalytischer verbrennungsheizer |
DE19941700C1 (de) * | 1999-09-02 | 2000-11-30 | Bosch Gmbh Robert | Vorrichtung zum Betreiben einer Heizungsanlage |
DE10044871B4 (de) * | 1999-11-02 | 2006-09-14 | Christian Wilkens | Verfahren zur Minimierung des Ausstoßes von Schadstoffpartikeln beim intermittierenden Betrieb von Ölheizkesseln |
DE19961286C2 (de) * | 1999-12-18 | 2001-12-13 | Bosch Gmbh Robert | Verfahren zum Regeln eines Wärmeerzeugers mit einer Luft-Abgas-Führung |
DE19961285C1 (de) * | 1999-12-18 | 2001-06-28 | Bosch Gmbh Robert | Verfahren zum Regeln eines Wärmeerzeugers mit einer Luft-Abgas-Führung |
EP1382919A1 (de) * | 2002-07-16 | 2004-01-21 | Siemens Building Technologies AG | Verfahren zur Optimierung des Brennereinschaltpunktes im Bereich der minimalen Kesseltemperatur |
DE102021206320A1 (de) * | 2021-06-21 | 2022-12-22 | Robert Bosch Gesellschaft mit beschränkter Haftung | Verfahren zum Bestimmen und/oder Optimieren einer Wärmeleistung eines Heizgeräts sowie Heizgerät und Steuergerät |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3510136C2 (de) * | 1985-03-18 | 1994-09-01 | Koerting Ag | Regelanordnung für Niedertemperatur-Heizkessel |
AT397714B (de) * | 1988-07-25 | 1994-06-27 | Vaillant Gmbh | Brennerbeheiztes gerät |
DE3907955A1 (de) * | 1989-03-11 | 1990-09-13 | Bosch Gmbh Robert | Verfahren zum regeln der vor- bzw. ruecklauftemperatur einer warmwasser-heizungsanlage |
AT400624B (de) * | 1992-05-11 | 1996-02-26 | Vaillant Gmbh | Verfahren zum steuern eines stufenlos einstellbaren brenners eines brennwertgerätes |
-
1995
- 1995-04-28 DE DE19515656A patent/DE19515656A1/de not_active Withdrawn
- 1995-12-30 DE DE59506098T patent/DE59506098D1/de not_active Expired - Lifetime
- 1995-12-30 ES ES95120753T patent/ES2134402T3/es not_active Expired - Lifetime
- 1995-12-30 EP EP95120753A patent/EP0740111B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE19515656A1 (de) | 1996-10-31 |
EP0740111A1 (de) | 1996-10-30 |
ES2134402T3 (es) | 1999-10-01 |
DE59506098D1 (de) | 1999-07-08 |
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