EP3581859A1 - Heat cell of a heating apparatus - Google Patents

Heat cell of a heating apparatus Download PDF

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Publication number
EP3581859A1
EP3581859A1 EP19167477.9A EP19167477A EP3581859A1 EP 3581859 A1 EP3581859 A1 EP 3581859A1 EP 19167477 A EP19167477 A EP 19167477A EP 3581859 A1 EP3581859 A1 EP 3581859A1
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EP
European Patent Office
Prior art keywords
burner
fuel gas
control pressure
pressure line
door
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19167477.9A
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German (de)
French (fr)
Other versions
EP3581859B1 (en
Inventor
Didier Bodet
Patrice Richard
David Chauvin
Nicolas Bellevert
Etienne Etienne Sinsoulier
Karim Somaia
Rémi Claisse
Henri Lami
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Vaillant GmbH
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Vaillant GmbH
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
    • F24H1/43—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes helically or spirally coiled
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/60—Devices for simultaneous control of gas and combustion air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M7/00—Doors
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
    • F24H9/2042—Preventing or detecting the return of combustion gases
    • F24H9/205—Closing the energy supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/104—Inspection; Diagnosis; Trial operation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/395—Information to users, e.g. alarms

Definitions

  • the invention relates to a device and a method for detecting a leak in a heat cell of a heating device with a fuel-operated burner and a combustion chamber sealed from the environment.
  • the object of the invention is to provide protection against unintentional exhaust gas leakage from combustion chambers with a fuel-operated burner.
  • This object is achieved according to the invention in that, in the case of a heat cell with a fuel-operated burner and a housing with an opening which can be closed by a removable burner door, a between the housing and the burner door Control pressure line for the fuel gas metering is arranged. In the event of malfunctions, the control pressure drops, the burner receives no fuel gas as a result and the system switches off.
  • control pressure line runs on the outer edge of the burner door, this ensures that the pressure in the control pressure line drops to ambient pressure in the event of a fault.
  • the control pressure line should at least run almost completely around the burner door so that an exit is also detected at every faulty point.
  • the line on the burner door should run at the top. Suitable materials are those with a melting point below 300 ° C, preferably plastic.
  • a temperature-resistant seal should be placed closer to the burner than the control pressure line; in the proper case, this protects the control pressure line.
  • the transition from the housing to the burner door can optionally also be sealed only by the control pressure line.
  • FIG 1 shows a heat cell 8 with a housing 10 with an opening which can be closed by a removable burner door 4.
  • a burner 1 projects into the interior of the heat cell 8, the burner 1 being connected to a blower 2 via a fuel gas / air supply 3 is.
  • a control pressure line 14 branches from the fuel gas-air supply 3 to a fuel gas metering device 15 in the form of a gas fitting, which supplies fuel gas to the fuel gas-air supply 3 via a fuel gas line 17 as a function of the pressure in the control pressure line 14.
  • the fuel gas flows into a venturi 16 within the fuel gas / air supply 3.
  • a graphite seal 7 is located between the housing 10 and the burner door 4.
  • the fan 2 When operating the heat cell 8, the fan 2 runs at a predetermined speed. Depending on this speed, a certain pressure is established in the control pressure line 14. In a gas fitting 15, this pressure serves as a manipulated variable for metering in fuel gas which is supplied to the fuel gas / air supply 3 via the fuel gas line 17. The fuel gas-air mixture is burned on the outer surface of the burner 1. The exhaust gases are cooled in a heat exchanger and discharged into the environment.
  • FIGS. 2 and 3 show a heat cell 8 according to the invention, which differs from the Figure 1 differs in that the control pressure line 14 does not run the shortest route to the fuel gas metering device 15, but instead runs additionally between the housing 10 and the burner door 4.
  • the heat cell 8 also has a fuel-operated burner 1. This is supplied with fuel gas by a fuel gas metering device 15 as a function of the pressure in a control pressure line 14.
  • a heat exchanger 9 is used to transfer thermal energy of the exhaust gases of the burner 1 to a heat sink.
  • the burner 1 and the heat exchanger are accommodated in a housing 10 with an opening.
  • the opening of the housing 10 can be closed by a removable burner door 4.
  • a fuel gas-air supply 3 is connected for supplying a fuel gas-air mixture.
  • a temperature-resistant graphite seal 7 is arranged between the housing 10 and the burner door 4.
  • the control pressure line 14 extends around the graphite seal 7 on the outer edge of the burner door 4, the control pressure line 14 being radially adjacent to the surroundings.
  • the control pressure line 14 is made of silicone.
  • the hot exhaust gas from the flame 12 of the burner 1 can flow past it and the control pressure line 14 is acted upon radially at the leakage point by hot exhaust gases.
  • the control pressure line 14 initially seals off the exhaust gases before they exit into the environment. However, if the control pressure line 14 is also damaged, so that it melts, the control pressure line 14 is no longer leakproof as a result. As a further consequence, the pressure in the control pressure line 14 assumes the ambient pressure.
  • the fuel gas metering device 15 is accordingly also subjected to ambient pressure, which it interprets as a signal for a non-existent air flow from the blower and accordingly determines the corresponding amount of fuel gas, which in the case of no amount of combustion air also means no amount of fuel gas.
  • fuel gas metering devices 15 are constructed in such a way that they require a specific, predetermined air flow or minimum pressure for the release of fuel gas. Since the pressure signal drops below this minimum value when the control pressure line 14 is defective, the fuel gas supply is interrupted and the burner goes out. A flame monitoring device, not shown, detects the extinction of the flame. If necessary, the device control tries to start the burner again, but this fails due to the pressure in the control pressure line 14 being too low, so that the device goes into the fault mode and gives a corresponding indication.
  • the at least the control pressure line 14 can only run in the upper area, since this area is particularly stressed by the thermal buoyancy.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fuel Cell (AREA)

Abstract

Bei Wärmezelle (8) mit einem brennstoffbetriebenen Brenner (1), welchem von einer Brenngasdosiereinrichtung (15) in Abhängigkeit des Drucks in einer Steuerdruckleitung (14) Brenngas zugeführt wird, einem Wärmetauscher (9) zur Übertragung thermischer Energie der Abgase des Brenners (1) auf eine Wärmesenke und einem Gehäuse (10) mit einer Öffnung, welche durch eine demontierbare Brennertür (4) verschließbar ist, ist auf der einen Seite der Brennertür (4) der Brenner (1) montiert. Die andere Seite der Brennertür (4) ist mit einer Brenngas-Luft-Zuführung (3) zur Zuführung eines Brenngas-Luft-Gemisch verbunden. Zwischen dem Gehäuse (10) und der Brennertür (4) ist die Steuerdruckleitung (14) angeordnet. Bei einer Undichtheit schmilzt die Steuerdruckleitung (14), wodurch die Brenngasführung zum Erliegen kommt und das Gerät abschaltet.

Figure imgaf001
In the case of a heat cell (8) with a fuel-operated burner (1), to which fuel gas is supplied by a fuel gas metering device (15) depending on the pressure in a control pressure line (14), a heat exchanger (9) for transferring thermal energy of the exhaust gases of the burner (1) The burner (1) is mounted on one side of the burner door (4) on a heat sink and a housing (10) with an opening which can be closed by a removable burner door (4). The other side of the burner door (4) is connected to a fuel gas-air supply (3) for supplying a fuel gas-air mixture. The control pressure line (14) is arranged between the housing (10) and the burner door (4). If there is a leak, the control pressure line (14) melts, causing the fuel gas flow to stop and the device to switch off.
Figure imgaf001

Description

Die Erfindung bezieht sich auf eine Vorrichtung und ein Verfahren zur Erkennung einer Undichtheit einer Wärmezelle eines Heizgerätes mit einem brennstoffbetriebenen Brenner sowie einer gegenüber der Umgebung abgedichteten Brennkammer.The invention relates to a device and a method for detecting a leak in a heat cell of a heating device with a fuel-operated burner and a combustion chamber sealed from the environment.

Bei Heizgeräten mit einem brennstoffbetriebenen Brenner werden etwa 1300°C heiße Abgase abgekühlt und diese Wärme Heizkörpern für Raumwärme und einer Brauchwassererwärmung zugeführt. Die Brennkammer ist hierbei zumeist über eine demontierbare Brennertür mit einer temperaturbeständigen Dichtung gegenüber der Umgebung abgedichtet. Bei Wartungsarbeiten wird diese Brennertür mit der Dichtung demontiert und wieder montiert. Hierbei kommt es ab und an zu Beschädigungen der Dichtung oder einer fehlerhaften Montage, so dass im ungünstigen Fall heiße Abgase nach außen gelangen können und hierbei zu Schäden am Heizgerät führen.In heaters with a fuel-operated burner, hot exhaust gases are cooled down to around 1300 ° C and this heat is fed to radiators for space heating and domestic water heating. The combustion chamber is usually sealed off from the surroundings by a removable burner door with a temperature-resistant seal. During maintenance work, this burner door with the seal is dismantled and reassembled. This occasionally causes damage to the seal or incorrect assembly, so that, in the worst case, hot exhaust gases can escape to the outside, causing damage to the heater.

Aufgabe der Erfindung ist eine Sicherung gegen unbeabsichtigten Abgasaustritt aus Brennkammern mit einem brennstoffbetriebenen Brenner zu schaffen.The object of the invention is to provide protection against unintentional exhaust gas leakage from combustion chambers with a fuel-operated burner.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass bei einer Wärmezelle mit einem brennstoffbetriebenen Brenner und einem Gehäuse mit einer Öffnung, welche durch eine demontierbare Brennertür verschließbar ist, zwischen dem Gehäuse und der Brennertür eine Steuerdruckleitung für die Brenngasdosierung angeordnet ist. Bei Störungen fällt der Steuerdruck ab, der Brenner bekommt in Folge dessen kein Brenngas und die Anlage schaltet ab.This object is achieved according to the invention in that, in the case of a heat cell with a fuel-operated burner and a housing with an opening which can be closed by a removable burner door, a between the housing and the burner door Control pressure line for the fuel gas metering is arranged. In the event of malfunctions, the control pressure drops, the burner receives no fuel gas as a result and the system switches off.

Vorteilhafte Ausgestaltungen ergeben sich aus den Merkmalen der abhängigen Ansprüche.Advantageous configurations result from the features of the dependent claims.

So ist in dem Fall, wenn die Steuerdruckleitung am äußeren Rand der Brennertür verläuft, gewährleistet, dass im Störfall der Druck in der Steuerdruckleitung auf Umgebungsdruck abfällt. Die Steuerdruckleitung sollte die Brennertür zumindest annähernd vollständig umlaufen, damit auch an jeder fehlerhaften Stelle ein Austritt detektiert wird. Insbesondere oben sollte die Leitung an der Brennertür verlaufen. Als Werkstoff eignen sich solche mit einem Schmelzpunkt unter 300°C, vorzugsweise Kunststoff. Eine temperaturbeständige Dichtung sollte näher am Brenner angeordnet sein als die Steuerdruckleitung; diese schützt im ordnungsgemäßen Fall die Steuerdruckleitung. Erfindungsgemäß kann der Übergang vom Gehäuse auf die Brennertür optional auch lediglich durch die Steuerdruckleitung abgedichtet sein.In the case when the control pressure line runs on the outer edge of the burner door, this ensures that the pressure in the control pressure line drops to ambient pressure in the event of a fault. The control pressure line should at least run almost completely around the burner door so that an exit is also detected at every faulty point. In particular, the line on the burner door should run at the top. Suitable materials are those with a melting point below 300 ° C, preferably plastic. A temperature-resistant seal should be placed closer to the burner than the control pressure line; in the proper case, this protects the control pressure line. According to the invention, the transition from the housing to the burner door can optionally also be sealed only by the control pressure line.

Die Erfindung wird anhand der Figuren näher erläutert. Hierbei zeigen

  • Figur 1 eine Wärmezelle gemäß dem Stand der Technik,
  • Figur 2 eine erfindungsgemäße Wärmezelle und
  • Figur 3 dieselbe erfindungsgemäße Wärmezelle aus einer anderen Perspektive.
The invention is illustrated by the figures. Show here
  • Figure 1 a heat cell according to the prior art,
  • Figure 2 a heat cell according to the invention and
  • Figure 3 the same heat cell according to the invention from a different perspective.

Figur 1 zeigt eine Wärmezelle 8 mit einem Gehäuse 10 mit einer Öffnung, welche durch eine demontierbare Brennertür 4 verschließbar ist. Ein Brenner 1 ragt in das Innere der Wärmezelle 8, wobei der Brenner 1 über eine Brenngas-Luft-Zuführung 3 mit einem Gebläse 2 verbunden ist. Von der Brenngas-Luft-Zuführung 3 zweigt eine Steuerdruckleitung 14 zu einer Brenngasdosiereinrichtung 15 in Form einer Gasarmatur, welche über eine Brenngasleitung 17 in Abhängigkeit des Drucks in der Steuerdruckleitung 14 Brenngas in die Brenngas-Luft-Zuführung 3 zuführt. Die Einmündung des Brenngases erfolgt in einem Venturi 16 innerhalb der Brenngas-Luft-Zuführung 3. Zwischen Gehäuse 10 und Brennertür 4 befindet sich eine Graphitdichtung 7. Figure 1 shows a heat cell 8 with a housing 10 with an opening which can be closed by a removable burner door 4. A burner 1 projects into the interior of the heat cell 8, the burner 1 being connected to a blower 2 via a fuel gas / air supply 3 is. A control pressure line 14 branches from the fuel gas-air supply 3 to a fuel gas metering device 15 in the form of a gas fitting, which supplies fuel gas to the fuel gas-air supply 3 via a fuel gas line 17 as a function of the pressure in the control pressure line 14. The fuel gas flows into a venturi 16 within the fuel gas / air supply 3. A graphite seal 7 is located between the housing 10 and the burner door 4.

Beim Betrieb der Wärmezelle 8 läuft das Gebläse 2 mit einer vorgegebenen Drehzahl. In Abhängigkeit dieser Drehzahl stellt sich ein bestimmter Druck in der Steuerdruckleitung 14 ein. Dieser Druck dient in einer Gasarmatur 15 als Stellgröße für die Zudosierung von Brenngas, welches über die Brenngasleitung 17 der Brenngas-Luft-Zuführung 3 zugeführt wird. Das Brenngas-Luft-Gemisch wird an der Außenfläche des Brenners 1 verbrannt. Die Abgase werden in einem Wärmetauscher abgekühlt und in die Umgebung abgeführt.When operating the heat cell 8, the fan 2 runs at a predetermined speed. Depending on this speed, a certain pressure is established in the control pressure line 14. In a gas fitting 15, this pressure serves as a manipulated variable for metering in fuel gas which is supplied to the fuel gas / air supply 3 via the fuel gas line 17. The fuel gas-air mixture is burned on the outer surface of the burner 1. The exhaust gases are cooled in a heat exchanger and discharged into the environment.

Ist die Graphitdichtung 7 beschädigt oder falsch montiert, kann heißes Abgas über den Spalt zwischen Gehäuse 10 und Brennertür 4 strömen und weitere Schäden verursachen.If the graphite seal 7 is damaged or incorrectly installed, hot exhaust gas can flow over the gap between the housing 10 and the burner door 4 and cause further damage.

Die Figuren 2 und 3 zeigen eine erfindungsgemäße Wärmezelle 8, welche sich von der aus Figur 1 dadurch unterscheidet, dass die Steuerdruckleitung 14 nicht auf kürzestem Weg zur Brenngasdosiereinrichtung 15 läuft, sondern stattdessen zusätzlich zwischen dem Gehäuse 10 und der Brennertür 4 verläuft.The Figures 2 and 3 show a heat cell 8 according to the invention, which differs from the Figure 1 differs in that the control pressure line 14 does not run the shortest route to the fuel gas metering device 15, but instead runs additionally between the housing 10 and the burner door 4.

Auch die erfindungsgemäße Wärmezelle 8 weist einen brennstoffbetriebenen Brenner 1 auf. Diesem wird von einer Brenngasdosiereinrichtung 15 in Abhängigkeit des Drucks in einer Steuerdruckleitung 14 Brenngas zugeführt. Ein Wärmetauscher 9 dient zur Übertragung thermischer Energie der Abgase des Brenners 1 auf eine Wärmesenke. Der Brenner 1 und der Wärmetauscher sind in einem Gehäuse 10 mit einer Öffnung untergebracht. Die Öffnung des Gehäuses 10 ist durch eine demontierbare Brennertür 4 verschließbar. Auf der zum Inneren des Gehäuses 10 gewandten Seite der Brennertür 4 ist der Brenner 1 montiert. Auf der anderen Seite der Brennertür 4 ist eine Brenngas-Luft-Zuführung 3 zur Zuführung eines Brenngas-Luft-Gemischs angeschlossen. Zwischen dem Gehäuse 10 und der Brennertür 4 ist umlassend eine temperaturbeständige Graphitdichtung 7 angeordnet. Um die Graphitdichtung 7 herum verläuft die Steuerdruckleitung 14 am äußeren Rand der Brennertür 4, wobei die Steuerdruckleitung 14 radial an die Umgebung angrenzt. Die Steuerdruckleitung 14 ist hierbei aus Silikon hergestellt.The heat cell 8 according to the invention also has a fuel-operated burner 1. This is supplied with fuel gas by a fuel gas metering device 15 as a function of the pressure in a control pressure line 14. A heat exchanger 9 is used to transfer thermal energy of the exhaust gases of the burner 1 to a heat sink. The burner 1 and the heat exchanger are accommodated in a housing 10 with an opening. The opening of the housing 10 can be closed by a removable burner door 4. On the inside the side of the burner door 4 facing the housing 10, the burner 1 is mounted. On the other side of the burner door 4, a fuel gas-air supply 3 is connected for supplying a fuel gas-air mixture. A temperature-resistant graphite seal 7 is arranged between the housing 10 and the burner door 4. The control pressure line 14 extends around the graphite seal 7 on the outer edge of the burner door 4, the control pressure line 14 being radially adjacent to the surroundings. The control pressure line 14 is made of silicone.

Ist die Graphitdichtung 7 undicht oder falsch montiert, so kann an ihr heißes Abgas der Flamme 12 des Brenners 1 vorbeiströmen und die Steuerdruckleitung 14 wird radial an der undichten Stelle mit heißen Abgasen beaufschlagt. Die Steuerdruckleitung 14 dichtet zunächst die Abgase vor einem Austritt in die Umgebung ab. Wird jedoch auch die Steuerdruckleitung 14 beschädigt, so dass diese schmilzt, ist die Steuerdruckleitung 14 in Folge dessen nicht mehr dicht. Als weitere Folge nimmt der Druck in der Steuerdruckleitung 14 den Umgebungsdruck an. Die Brenngasdosiereinrichtung 15 wird demnach auch mit Umgebungsdruck beaufschlagt, was sie als Signal für einen nicht vorhandenen Luftstrom vom Gebläse interpretiert und demnach die hierzu korrespondierende Brenngasmenge bestimmt, was im Fall von keiner Verbrennungsluftmenge auch keine Brenngasmenge bedeutet. Zudem sind Brenngasdosiereinrichtungen 15 derart konstruiert, dass sie einen bestimmten, vorgegebenen Luftstrom beziehungsweise Mindestdruck für die Freigabe von Brenngas benötigen. Da bei defekter Steuerdruckleitung 14 das Drucksignal unter diesen Mindestwert abfällt, wird die Brenngaszufuhr unterbrochen und der Brenner erlischt. Eine nicht dargestellt Flammenüberwachungsvorrichtung erkennt das Erlöschen der Flamme. Gegebenenfalls versucht die Gerätesteuerung, den Brenner wieder zu starten, was aber aufgrund des zu geringen Drucks in der Steuerdruckleitung 14 misslingt, so dass das Gerät in den Störungsmodus geht und einen entsprechenden Hinweis gibt.If the graphite seal 7 is leaky or incorrectly installed, the hot exhaust gas from the flame 12 of the burner 1 can flow past it and the control pressure line 14 is acted upon radially at the leakage point by hot exhaust gases. The control pressure line 14 initially seals off the exhaust gases before they exit into the environment. However, if the control pressure line 14 is also damaged, so that it melts, the control pressure line 14 is no longer leakproof as a result. As a further consequence, the pressure in the control pressure line 14 assumes the ambient pressure. The fuel gas metering device 15 is accordingly also subjected to ambient pressure, which it interprets as a signal for a non-existent air flow from the blower and accordingly determines the corresponding amount of fuel gas, which in the case of no amount of combustion air also means no amount of fuel gas. In addition, fuel gas metering devices 15 are constructed in such a way that they require a specific, predetermined air flow or minimum pressure for the release of fuel gas. Since the pressure signal drops below this minimum value when the control pressure line 14 is defective, the fuel gas supply is interrupted and the burner goes out. A flame monitoring device, not shown, detects the extinction of the flame. If necessary, the device control tries to start the burner again, but this fails due to the pressure in the control pressure line 14 being too low, so that the device goes into the fault mode and gives a corresponding indication.

Optional kann die zumindest die Steuerdruckleitung 14 nur im oberen Bereich verlaufen, da dieser Bereich durch den thermischen Auftrieb besonders belastet ist.Optionally, the at least the control pressure line 14 can only run in the upper area, since this area is particularly stressed by the thermal buoyancy.

BezuaszeichenlisteBezuaszeichenliste

  1. 1 Brenner1 burner
  2. 2 Gebläse2 blowers
  3. 3 Brenngas-Luft-Zuführung3 fuel gas-air supply
  4. 4 Brennertür4 burner door
  5. 5  5
  6. 6 6
  7. 7 Graphitdichtung7 graphite gasket
  8. 8 Wärmezelle8 heat cell
  9. 9 Wärmetauscher9 heat exchangers
  10. 10 Gehäuse10 housing
  11. 11 Brennkammer11 combustion chamber
  12. 12 Flamme12 flame
  13. 13 Abgasleitung13 exhaust pipe
  14. 14 Steuerdruckleitung14 control pressure line
  15. 15 Gasarmatur15 gas valve
  16. 16 Venturi16 venturi
  17. 17 Brenngasleitung17 Fuel gas line

Claims (6)

Wärmezelle (8) mit einem brennstoffbetriebenen Brenner (1), welchem von einer Brenngasdosiereinrichtung (15) in Abhängigkeit des Drucks in einer Steuerdruckleitung (14) Brenngas zugeführt wird, einem Wärmetauscher (9) zur Übertragung thermischer Energie der Abgase des Brenners (1) auf eine Wärmesenke und einem Gehäuse (10) mit einer Öffnung, welche durch eine demontierbare Brennertür (4) verschließbar ist, wobei auf der einen Seite der Brennertür (4) der Brenner (1) montiert ist und die andere Seite der Brennertür (4) mit einer Brenngas-Luft-Zuführung (3) zur Zuführung eines Brenngas-Luft-Gemisch verbunden ist, dadurch gekennzeichnet, dass zwischen dem Gehäuse (10) und der Brennertür (4) die Steuerdruckleitung (14) angeordnet ist.Heat cell (8) with a fuel-operated burner (1), which is supplied with fuel gas by a fuel gas metering device (15) depending on the pressure in a control pressure line (14), has a heat exchanger (9) for transferring thermal energy of the exhaust gases of the burner (1) a heat sink and a housing (10) with an opening which can be closed by a removable burner door (4), the burner (1) being mounted on one side of the burner door (4) and the other side of the burner door (4) A fuel gas-air supply (3) for supplying a fuel gas-air mixture is connected, characterized in that the control pressure line (14) is arranged between the housing (10) and the burner door (4). Wärmezelle (8) mit Brennertür (4) nach Anspruch 1, dadurch gekennzeichnet, dass die Steuerdruckleitung (14) am äußeren Rand der Brennertür (4) verläuft.Heat cell (8) with burner door (4) according to claim 1, characterized in that the control pressure line (14) runs on the outer edge of the burner door (4). Wärmezelle (8) mit Brennertür (4) nach Anspruch 2, dadurch gekennzeichnet, dass die Steuerdruckleitung (14) die Brennertür (4) zumindest annähernd umlaufend umgibt.Heat cell (8) with burner door (4) according to claim 2, characterized in that the control pressure line (14) surrounds the burner door (4) at least approximately circumferentially. Wärmezelle (8) mit Brennertür (4) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Steuerdruckleitung (14) aus einem Werkstoff mit einem Schmelzpunkt unter 300°C, vorzugsweise Kunststoff hergestellt ist.Heat cell (8) with burner door (4) according to one of claims 1 to 3, characterized in that the control pressure line (14) is made of a material with a melting point below 300 ° C, preferably plastic. Wärmezelle (8) mit Brennertür (4) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass sich zwischen Gehäuse (10) und Brennertür (4) eine temperaturbeständige Dichtung (7) befindet.Heat cell (8) with burner door (4) according to one of Claims 1 to 4, characterized in that a temperature-resistant seal (7) is located between the housing (10) and the burner door (4). Wärmezelle (8) mit Brennertür (4) nach Anspruch 5, dadurch gekennzeichnet, dass die temperaturbeständige Dichtung (7) näher am Brenner (1) angeordnet ist als die Steuerdruckleitung (14).Heat cell (8) with burner door (4) according to claim 5, characterized in that the temperature-resistant seal (7) is arranged closer to the burner (1) than the control pressure line (14).
EP19167477.9A 2018-06-12 2019-04-05 Heat cell of a heating apparatus Active EP3581859B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018113993.4A DE102018113993A1 (en) 2018-06-12 2018-06-12 Heat cell of a heater

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EP3581859A1 true EP3581859A1 (en) 2019-12-18
EP3581859B1 EP3581859B1 (en) 2021-02-24

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19749510A1 (en) * 1997-11-08 1999-05-12 Buderus Heiztechnik Gmbh Mixer for mixing inflammable gas and air
DE10015399A1 (en) * 2000-03-28 2001-10-04 Viessmann Werke Kg Gas boiler has a blower to assist the burner with a bi-metal deflector to divert air into a control pressure channel according the dropping combustion air temperature
WO2013060997A2 (en) * 2011-10-26 2013-05-02 Gdf Suez Device for regulating a gas mixture
US20150153067A1 (en) * 2009-03-06 2015-06-04 Giannoni France Door with a built-in burner for a heating appliance

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050051155A1 (en) * 2003-08-12 2005-03-10 Tomlinson John L. Direct-fired, gas-fueled heater

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19749510A1 (en) * 1997-11-08 1999-05-12 Buderus Heiztechnik Gmbh Mixer for mixing inflammable gas and air
DE10015399A1 (en) * 2000-03-28 2001-10-04 Viessmann Werke Kg Gas boiler has a blower to assist the burner with a bi-metal deflector to divert air into a control pressure channel according the dropping combustion air temperature
US20150153067A1 (en) * 2009-03-06 2015-06-04 Giannoni France Door with a built-in burner for a heating appliance
WO2013060997A2 (en) * 2011-10-26 2013-05-02 Gdf Suez Device for regulating a gas mixture

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DE102018113993A1 (en) 2019-12-12
EP3581859B1 (en) 2021-02-24

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