EP0505714B1 - Control device for a gas burner with a fan for supplying combustion air - Google Patents
Control device for a gas burner with a fan for supplying combustion air Download PDFInfo
- Publication number
- EP0505714B1 EP0505714B1 EP92102550A EP92102550A EP0505714B1 EP 0505714 B1 EP0505714 B1 EP 0505714B1 EP 92102550 A EP92102550 A EP 92102550A EP 92102550 A EP92102550 A EP 92102550A EP 0505714 B1 EP0505714 B1 EP 0505714B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- temperature
- control
- air
- combustion air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
- F23N5/04—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using bimetallic elements
- F23N5/047—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using bimetallic elements using mechanical means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
- F23N1/027—Regulating fuel supply conjointly with air supply using mechanical means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2225/00—Measuring
- F23N2225/04—Measuring pressure
- F23N2225/06—Measuring pressure for determining flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2233/00—Ventilators
- F23N2233/06—Ventilators at the air intake
- F23N2233/08—Ventilators at the air intake with variable speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/12—Fuel valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/12—Fuel valves
- F23N2235/20—Membrane valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel
Definitions
- the invention is based on a control device for gas burners with a blower for supplying combustion air Opening cross section is fixed unchangeable.
- the gas volume flow is controlled depending on the conveyed air volume flow, but it is not taken into account that the density and thus the oxygen mass of the air volume flow is dependent on its temperature and can therefore also adversely affect the quality of combustion.
- the ratio of the combustion air mass to the fuel gas mass must be kept constant. With a constant combustion gas temperature and a variable combustion air temperature, however, this cannot be achieved with a fixed throttle orifice, because this cannot compensate for the temperature-dependent change in density of the air volume flow.
- the combustion air is heated in a recuperator downstream of a measuring orifice controlling the gas control valve.
- a measuring orifice is installed in the fuel gas line downstream of the gas control valve and the gas pressure behind this measuring orifice is fed back to the gas control valve as a correction signal.
- the temperature of the combustion air upstream of the measuring orifice provided in the combustion air line is also not taken into account, in spite of an increased outlay in terms of apparatus, so that here too a constant excess of air cannot be maintained at different combustion air temperatures.
- the object of the invention is to make the control variable derived by means of the setpoint generator also dependent on the temperature of the air volume flow. This object is achieved by a control device with the features of claim 1.
- the arrangement according to the invention with the characterizing features of claim 1 has the advantage that, with a corresponding design of the setpoint generator and the gas control valve, the excess air can be adjusted to the optimum value over the entire controlled power range with automatic consideration of the combustion air temperature.
- the setpoint generator for the gas control valve is a control pressure orifice in the combustion air line that generates differential pressure, the effective cross section of which is controlled as a function of temperature.
- the arrangement can be such that the cross section increases with increasing temperature of the air volume flow and thereby the control pressure difference in In terms of lowering the setpoint of the gas control valve is reduced.
- the flow resistance of the control pressure orifice also decreases, so that the air volume flow also changes in the desired sense compared to the gas volume flow due to this effect.
- the effective cross section of the control pressure orifice can advantageously be influenced by at least one control flap which is coupled to a temperature-sensitive actuator acted upon by the air volume flow.
- a simple arrangement results if a bimetal element is provided as an actuator for the control flap.
- the bimetal element can itself be designed as a control flap and attached directly to the panel.
- a bellows filled with expansion liquid or, for example, a wax expansion element can also be provided.
- the measuring location can be located away from the actuator.
- the temperature of the combustion air can also be detected by electronic means that act on an electromechanical actuator, such as a magnet or motor.
- a control pressure orifice has an uncontrolled main opening and at least one temperature-controlled secondary opening.
- This is expediently assigned a control flap which is designed directly as a bimetal element.
- the control characteristic can be adapted to the requirements of the respective application by appropriately selecting the dimensions of the control openings. If two or more bimetallic elements or control flaps are arranged, the control characteristic can also be adapted by means of stepped prestressing of the bimetallic elements.
- control device can be used both in systems or devices with forced draft burners and in devices with atmospheric gas burners which are provided with a fan to support the supply of combustion air.
- FIG. 1 shows a schematic overall view of the burner device for a gas-heated water heater
- FIG. 2 shows the side view of a control pressure orifice of the device according to FIG. 1
- FIG. 3 shows a section along the line III-III in FIG. 2.
- the burner device has a fan 10 for supplying combustion air, the speed of which is controlled in accordance with the heat requirement.
- the fan 10 conveys the combustion air into a channel 12, into which a gas line 16 supplying the fuel gas opens at the point 14.
- the channel 12 leads into a distribution chamber 18 of a premix burner 20, from which the fuel-air mixture passes through a perforated plate 22 to the combustion zone 24 of the premix burner 20, evenly distributed.
- the combustion takes place in a combustion chamber 26 which is arranged between the premix burner 20 and a heat exchanger for the water to be heated, which heat exchanger is no longer shown.
- the control pressure orifice 30 derives a differential pressure from the air volume flow in the channel 12, which is transmitted to the gas pressure regulator 32 as a control variable via lines 34, 36.
- the control pressure orifice 30 and the gas pressure regulator 32 are designed in such a way that a constant excess of air in the fuel-air mixture results over a predetermined power range of the premix burner 20 for a predetermined normal value of the combustion air temperature.
- the control pressure orifice 30 is also designed according to the invention so that it also detects the temperature of the combustion air and controls the setpoint of the gas pressure regulator 32 depending on the temperature so that there is a constant excess of air even at different temperatures of the combustion air.
- the control pressure orifice 30 is provided, in addition to a main opening 38 with an unchangeable opening cross section, with a secondary opening 40, the opening cross section of which can be changed by a control flap 42 which is adjustable as a function of temperature.
- the control flap 42 is designed as a bimetallic strip which is attached directly to the control pressure orifice 30 and is thus exposed to the temperature of the combustion air.
- the openings 38, 40 in the control pressure orifice 30 and the control flap 42 are dimensioned or designed and coordinated with one another such that the ratio of air mass to gas mass is approximately the same at all temperatures of the combustion air occurring in practice within a predetermined performance range of the premix burner 20. so that the excess air is almost constant in this power range.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
Description
Die Erfindung geht aus von einer Regelvorrichtung für Gasbrenner mit einem Gebläse zum Zuführen von Verbrennungsluft nach der Gattung des Anspruches 1. Bei einer bekannten Regelvorrichtung dieser Gattung (DE-A1 31 05 862) ist der Sollwertgeber für das Gasregelventil eine im Luftvolumenstrom angeordnete Drosselblende, deren Öffnungsquerschnitt unveränderbar festgelegt ist. Bei dieser Anordnung wird zwar der Gasvolumenstrom abhängig vom geförderten Luftvolumenstrom gesteuert, jedoch bleibt unberücksichtigt, daß die Dichte und damit die Sauerstoffmasse des Luftvolumenstroms abhängig von dessen Temperatur ist und diese daher die Verbrennungsgüte auch nachteilig beeinflussen kann. Für einen konstanten Luftüberschuß bei der Verbrennung muß das Verhältnis von Verbrennungsluftmasse zu Brenngasmasse konstant gehalten werden. Bei konstanter Brenngastemperatur und veränderlicher Verbrennungslufttemperatur gelingt das mit einer fest eingestellten Drosselblende jedoch nicht, weil diese die temperaturabhängige Dichteänderung des Luftvolumenstroms nicht kompensieren kann.The invention is based on a control device for gas burners with a blower for supplying combustion air Opening cross section is fixed unchangeable. In this arrangement, the gas volume flow is controlled depending on the conveyed air volume flow, but it is not taken into account that the density and thus the oxygen mass of the air volume flow is dependent on its temperature and can therefore also adversely affect the quality of combustion. For a constant excess of air during combustion, the ratio of the combustion air mass to the fuel gas mass must be kept constant. With a constant combustion gas temperature and a variable combustion air temperature, however, this cannot be achieved with a fixed throttle orifice, because this cannot compensate for the temperature-dependent change in density of the air volume flow.
Bei einer anderen Regelvorrichtung der eingangs genannten Art (DE-A1 30 06 683) wird die Verbrennungsluft stromab einer das Gasregelventil steuernden Meßblende in einem Rekuperator erwärmt. Um einer möglichen Erwärmung des Brenngases durch den Gasbrenner Rechnung zu tragen, ist stromab des Gasregelventils eine Meßblende in die Brenngasleitung eingebaut und der Gasdruck hinter dieser Meßblende als Korrektursignal an das Gasregelventil zurückgeführt. Bei dieser bekannten Anordnung wird jedoch trotz eines erhöhten apparativen Aufwands die Temperatur der Verbrennungsluft stromauf der in der Verbrennungsluftleitung vorgesehenen Meßblende ebenfalls nicht berücksichtigt, so daß auch hier ein konstanter Luftüberschuß bei unterschiedlichen Verbrennungslufttemperaturen nicht eingehalten werden kann.In another control device of the type mentioned at the beginning (DE-A1 30 06 683), the combustion air is heated in a recuperator downstream of a measuring orifice controlling the gas control valve. In order to take into account possible heating of the fuel gas by the gas burner, a measuring orifice is installed in the fuel gas line downstream of the gas control valve and the gas pressure behind this measuring orifice is fed back to the gas control valve as a correction signal. In this known arrangement, however, the temperature of the combustion air upstream of the measuring orifice provided in the combustion air line is also not taken into account, in spite of an increased outlay in terms of apparatus, so that here too a constant excess of air cannot be maintained at different combustion air temperatures.
Aufgabe der Erfindung ist es bei einer Regelvorrichtung nach dem Oberbegriff des Anspruchs 1, die die mittels des Sollwertgebers abgeleitete Steuergröße auch von der Temperatur des Luftvolumenstromes abhängig zu machen. Diese Aufgabe wird durch eine Regelvorrichtung mit den Merkmalen des Anspruchs 1 gelöst.In a control device according to the preamble of claim 1, the object of the invention is to make the control variable derived by means of the setpoint generator also dependent on the temperature of the air volume flow. This object is achieved by a control device with the features of claim 1.
Die erfindungsgemäße Anordnung mit den kennzeichnenden Merkmalen des Anspruchs 1 hat demgegenüber den Vorteil, daß bei entsprechender Auslegung des Sollwertgebers und des Gasregelventils der Luftüberschuß über den gesamten gesteuerten Leistungsbereich unter selbsttätiger Berücksichtigung der Verbrennungslufttemperatur auf den optimalen Wert eingeregelt werden kann.The arrangement according to the invention with the characterizing features of claim 1 has the advantage that, with a corresponding design of the setpoint generator and the gas control valve, the excess air can be adjusted to the optimum value over the entire controlled power range with automatic consideration of the combustion air temperature.
Durch die in den abhängigen Ansprüchen enthaltenen Maßnahmen sind vorteilhafte Weiterbildungen der Anordnung nach dem Hauptanspruch möglich.The measures contained in the dependent claims allow advantageous developments of the arrangement according to the main claim.
Eine einfache und ohne zusätzliche Einbauten in der Verbrennungsluftleitung auskommende Ausführung ergibt sich, wenn der Sollwertgeber für das Gasregelventil eine differenzdruckerzeugende Steuerdruckblende in der Verbrennungsluftleitung ist, deren wirksamer Querschnitt temperaturabhängig gesteuert ist. Die Anordnung kann so getroffen sein, daß mit zunehmender Temperatur des Luftvolumenstroms der Querschnitt vergrößert und dadurch die Steuerdruckdifferenz im Sinne einer Absenkung des Sollwerts des Gasregelventils verringert wird. Dabei verringert sich auch der Strömungswiderstand der Steuerdruckblende, so daß sich auch durch diesen Effekt der Luftvolumenstrom gegenüber dem Gasvolumenstrom im gewünschten Sinn verändert.A simple design that does not require any additional fittings in the combustion air line is obtained if the setpoint generator for the gas control valve is a control pressure orifice in the combustion air line that generates differential pressure, the effective cross section of which is controlled as a function of temperature. The arrangement can be such that the cross section increases with increasing temperature of the air volume flow and thereby the control pressure difference in In terms of lowering the setpoint of the gas control valve is reduced. The flow resistance of the control pressure orifice also decreases, so that the air volume flow also changes in the desired sense compared to the gas volume flow due to this effect.
Der wirksame Querschnitt der Steuerdruckblende kann vorteilhaft von mindestens einer Steuerklappe beeinflußt sein, die mit einem vom Luftvolumenstrom beaufschlagten temperaturempfindlichen Stellglied gekopppelt ist.The effective cross section of the control pressure orifice can advantageously be influenced by at least one control flap which is coupled to a temperature-sensitive actuator acted upon by the air volume flow.
Eine einfache Anordnung ergibt sich, wenn als Stellglied für die Steuerklappe ein Bimetallelement vorgesehen ist. Das Bimetallelement kann selbst als Steuerklappe ausgebildet und unmittelbar an der Blende befestigt sein.A simple arrangement results if a bimetal element is provided as an actuator for the control flap. The bimetal element can itself be designed as a control flap and attached directly to the panel.
Anstelle eines Bimetallelements als Stellglied kann auch ein mit Ausdehnungsflüssigkeit gefüllter Balg oder beispielsweise ein Wachsdehnelement vorgesehen sein. In diesen Fällen kann der Meßort entfernt vom Stellorgan angeordnet werden. Die Temperatur der Verbrennungsluft kann auch durch elektronische Mittel erfaßt werden, die auf ein elektromechanisches Stellglied, wie Magnet oder Motor, einwirken.Instead of a bimetal element as an actuator, a bellows filled with expansion liquid or, for example, a wax expansion element can also be provided. In these cases, the measuring location can be located away from the actuator. The temperature of the combustion air can also be detected by electronic means that act on an electromechanical actuator, such as a magnet or motor.
Bei einer bevorzugten Ausführungsform der Erfindung hat eine Steuerdruckblende eine ungesteuerte Hauptöffnung und mindestens eine temperaturabhängig gesteuerte Nebenöffnung. Dieser ist zweckmäßig eine unmittelbar als Bimetallelement ausgebildete Steuerklappe zugeordnet. Durch entsprechende Wahl der Abmessungen der Steueröffnungen kann die Steuercharakteristik den Anforderungen des jeweiligen Anwendungsfalles angepaßt werden. Bei Anordnung von zwei oder mehr Bimetallelementen bzw. Steuerklappen kann die Steuercharakteristik auch durch gestufte Vorspannung der Bimetallelemente angepaßt werden.In a preferred embodiment of the invention, a control pressure orifice has an uncontrolled main opening and at least one temperature-controlled secondary opening. This is expediently assigned a control flap which is designed directly as a bimetal element. The control characteristic can be adapted to the requirements of the respective application by appropriately selecting the dimensions of the control openings. If two or more bimetallic elements or control flaps are arranged, the control characteristic can also be adapted by means of stepped prestressing of the bimetallic elements.
Die erfindungsgemäße Regelvorrichtung kann sowohl in Anlagen bzw. Geräten mit Gebläsebrennern als auch in Geräten mit atmosphärischen Gasbrennern eingesetzt werden, die zur Unterstützung der Verbrennungsluftzufuhr mit einem Gebläse versehen sind.The control device according to the invention can be used both in systems or devices with forced draft burners and in devices with atmospheric gas burners which are provided with a fan to support the supply of combustion air.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 eine schematische Gesamtansicht der Brennereinrichtung für einen gasbeheizten Wassererhitzer, Figur 2 die Seitenansicht einer Steuerdruckblende der Einrichtung nach Figur 1 und Figur 3 einen Schnitt nach der Linie III-III in Figur 2.An embodiment of the invention is shown in simplified form in the drawing and explained in more detail in the following description. 1 shows a schematic overall view of the burner device for a gas-heated water heater, FIG. 2 shows the side view of a control pressure orifice of the device according to FIG. 1, and FIG. 3 shows a section along the line III-III in FIG. 2.
Die Brennereinrichtung hat ein Gebläse 10 zum Zuführen von Verbrennungsluft, dessen Drehzahl der Wärmeanforderung entsprechend gesteuert ist. Das Gebläse 10 fördert die Verbrennungsluft in einen Kanal 12, in welchen an der Stelle 14 eine das Brenngas zuführende Gasleitung 16 einmündet. Der Kanal 12 führt in eine Verteilerkammer 18 eines Vormischbrenners 20, aus welcher das Brennstoff-Luftgemisch durch ein Lochblech 22 gleichmäßig verteilt zur Brennzone 24 des Vormischbrenners 20 gelangt. Die Verbrennung erfolgt in einer Brennkammer 26, die zwischen dem Vormischbrenner 20 und einem nicht mehr dargestellten Wärmeübertrager für das zu erhitzende Wasser angeordnet ist.The burner device has a
In den Kanal 12 ist stromauf der Stelle 14 eine Steuerdruckblende 30 eingebaut, die einen Sollwertgeber für einen Gasdruckregler 32 in der Gasleitung 16 bildet. Die Steuerdruckblende 30 leitet aus dem Luftvolumenstrom im Kanal 12 einen Differenzdruck ab, der über Leitungen 34, 36 als Steuergröße an den Gasdruckregler 32 übertragen wird. Die Steuerdruckblende 30 und der Gasdruckregler 32 sind wie bekannt so ausgebildet, daß sich über einen vorgegebenen Leistungsbereich des Vormischbrenners 20 für einen vorgegebenen Normalwert der Verbrennungslufttemperatur ein konstanter Luftüberschuß im Brennstoff-Luftgemisch ergibt.A
Die Steuerdruckblende 30 ist darüber hinaus erfindungsgemäß so ausgebildet, daß sie auch die Temperatur der Verbrennungsluft erfaßt und den Sollwert des Gasdruckreglers 32 temperaturabhängig so steuert, daß sich ein konstanter Luftüberschuß auch bei unterschiedlichen Temperaturen der Verbrennungsluft ergibt. Zu diesem Zweck ist die Steuerdruckblende 30 neben einer Hauptöffnung 38 mit unveränderlichem Öffnungsquerschnitt mit einer Nebenöffnung 40 versehen, deren Öffnungsquerschnitt durch eine temperaturabhängig verstellbare Steuerklappe 42 veränderbar ist. Die Steuerklappe 42 ist als Bimetallstreifen ausgebildet, der unmittelbar an der Steuerdruckblende 30 befestigt und so der Temperatur der Verbrennungsluft ausgesetzt ist.The
Die Öffnungen 38, 40 in der Steuerdruckblende 30 und die Steuerklappe 42 sind so bemessen bzw. ausgebildet und aufeinander abgestimmt, daß bei allen in der Praxis vorkommenden Temperaturen der Verbrennungsluft innerhalb eines vorgegebenen Leistungsbereichs des Vormischbrenners 20 das Verhältnis von Luftmasse zu Gasmasse annähernd gleich ist, so daß in diesem Leistungsbereich auch der Luftüberschuß annähernd konstant ist.The
Claims (7)
- Regulating device for gas burners with a blower for the supply of combustion air, having a desired-value generator (30), arranged downstream of the blower and deriving a control variable from the air volume flow, for a gas-regulating valve (32) which, within a predetermined burner-capacity range, controls the mixture ratio of fuel gas and combustion air with the effect of optimizing the combustion, characterized in that the desired-value generator (30) for the gas-regulating valve (32) also records the temperature of the combustion air and controls the desired value as a function of temperature in such a way that, with a rising temperature of the combustion air, the volume fraction of the fuel gas in the total volume of the fuel-gas/air mixture decreases, and vice versa.
- Regulating device according to Claim 1, characterized in that the desired-value generator of the gas-regulating valve (32) has, in a combustion-air conduit (12) leading to the gas burner (20), a control-pressure diaphragm (30) which produces differential pressure and the effective cross-section of which is controlled as a function of temperature.
- Regulating device according to Claim 2, characterized in that the effective cross-section of the control-pressure diaphragm (30) is influenced by at least one control flap (42) which is coupled to a temperature-sensitive actuator loaded by the air volume flow.
- Regulating device according to Claim 3, characterized in that the temperature-sensitive actuator (42) is a bimetallic element.
- Regulating device according to Claim 4, characterized in that the bimetallic element (42) itself forms the control flap.
- Regulating device according to one of Claims 2 to 5, characterized in that the control-pressure diaphragm (30) has an uncontrolled main port (38) and at least one temperature-controlled secondary port (40).
- Regulating device according to one of the preceding claims, characterized in that the gas-regulating valve (32) is a gas-pressure regulator controlled by differential pressure.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4109841 | 1991-03-26 | ||
| DE4109841A DE4109841C2 (en) | 1991-03-26 | 1991-03-26 | Control device for gas burners with a fan for supplying combustion air |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0505714A2 EP0505714A2 (en) | 1992-09-30 |
| EP0505714A3 EP0505714A3 (en) | 1993-03-03 |
| EP0505714B1 true EP0505714B1 (en) | 1996-01-24 |
Family
ID=6428195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92102550A Expired - Lifetime EP0505714B1 (en) | 1991-03-26 | 1992-02-15 | Control device for a gas burner with a fan for supplying combustion air |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0505714B1 (en) |
| DE (2) | DE4109841C2 (en) |
| PT (1) | PT100296B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4343306A1 (en) * | 1993-12-17 | 1995-06-22 | Gastechnic Prod Vertriebges | Gas pipeline pressure regulation system |
| EP0724117B1 (en) | 1995-01-30 | 1998-07-08 | Landis & Gyr Technology Innovation AG | Control device for a gas power burner |
| DE29504705U1 (en) | 1995-03-24 | 1996-07-25 | Bosch Gmbh Robert | Control device for a burner with a fan for the combustion air |
| DE19510425C2 (en) * | 1995-03-24 | 1999-05-27 | Bosch Gmbh Robert | Method and device for controlling a heater |
| DE19538947C2 (en) * | 1995-10-19 | 1998-11-26 | Webasto Thermosysteme Gmbh | Vehicle heater |
| DE19711140A1 (en) * | 1997-03-18 | 1998-06-04 | Bosch Gmbh Robert | Method for operating burner with mixture of fuel and air |
| NL1006559C2 (en) * | 1997-07-11 | 1999-01-12 | Vries Metaal Bv | Regulation of fuel supply to a heating appliance. |
| DE19853573A1 (en) * | 1998-11-20 | 2000-05-25 | Bosch Gmbh Robert | heater |
| DE19943612B4 (en) * | 1999-09-11 | 2004-07-15 | Robert Bosch Gmbh | Method for operating a gas burner with modulating burner output |
| DE10000653C2 (en) * | 2000-01-11 | 2002-06-27 | Bosch Gmbh Robert | Gas heater with pneumatically controlled premix burner |
| DE10119598C2 (en) * | 2001-04-21 | 2003-10-02 | Bosch Gmbh Robert | Device for mixing gas and air for a gas heater |
| DE10303081B3 (en) * | 2003-01-27 | 2004-07-29 | Webasto Thermosysteme International Gmbh | Auxiliary heating device for automobile with adjustment of fuel/air mixture supplied to burner in dependence on measured temperature of fuel |
| US9528712B2 (en) * | 2012-11-05 | 2016-12-27 | Pat Caruso | Modulating burner system |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2607286C3 (en) * | 1976-02-23 | 1979-03-22 | Tuezelestechnikai Kutatointezet, Miskolc (Ungarn) | Air volume control for fireplaces |
| DE2708858C2 (en) * | 1977-03-01 | 1986-04-24 | Caloric Gesellschaft für Apparatebau mbH, 8032 Gräfelfing | Control device for a burner for flowable fuels |
| DE2735719A1 (en) * | 1977-08-08 | 1979-02-15 | Tuezelestechnikai Kutatointez | Fireplace combustion air flow control - is actuated by fuel supply and uses bimetallic air temp. sensor |
| DE3006683A1 (en) * | 1980-02-22 | 1981-08-27 | G. Kromschröder AG, 4500 Osnabrück | Gas burner control with temp. variation compensator - has pressure at burner fed into airflow-actuated gas flow regulator control line |
| DE3105862A1 (en) * | 1981-02-18 | 1982-09-09 | Stiebel Eltron Gmbh & Co Kg, 3450 Holzminden | Gas blower burner |
| DE3125513A1 (en) * | 1981-06-29 | 1983-01-13 | Siemens AG, 1000 Berlin und 8000 München | Method of operating a gasification burner/heating boiler installation |
| DE3238682A1 (en) * | 1982-10-19 | 1984-04-19 | Kutzner, Luitpold, 8031 Maisach | Shut-off device in the waste gas flue of a fireplace |
| DE3812697A1 (en) * | 1988-04-16 | 1989-12-28 | Programmelectronic Eng Ag | METHOD FOR REDUCING THE INTERFERENCE EFFECT IN FAN BURNER PLANTS AND FAN BURNER PLANT |
| JPH1114617A (en) * | 1997-06-24 | 1999-01-22 | Kdk Corp | Specimen for liquid sample and its manufacture |
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1991
- 1991-03-26 DE DE4109841A patent/DE4109841C2/en not_active Expired - Fee Related
-
1992
- 1992-02-15 EP EP92102550A patent/EP0505714B1/en not_active Expired - Lifetime
- 1992-02-15 DE DE59205137T patent/DE59205137D1/en not_active Expired - Lifetime
- 1992-03-25 PT PT100296A patent/PT100296B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE59205137D1 (en) | 1996-03-07 |
| PT100296A (en) | 1994-04-29 |
| EP0505714A2 (en) | 1992-09-30 |
| PT100296B (en) | 1999-07-30 |
| DE4109841C2 (en) | 1994-06-09 |
| DE4109841A1 (en) | 1992-10-01 |
| EP0505714A3 (en) | 1993-03-03 |
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