EP3428533B1 - Waste gas device for a combustion device in a vehicle - Google Patents

Waste gas device for a combustion device in a vehicle Download PDF

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Publication number
EP3428533B1
EP3428533B1 EP18190933.4A EP18190933A EP3428533B1 EP 3428533 B1 EP3428533 B1 EP 3428533B1 EP 18190933 A EP18190933 A EP 18190933A EP 3428533 B1 EP3428533 B1 EP 3428533B1
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EP
European Patent Office
Prior art keywords
flue gas
duct
pressure section
air
air duct
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EP18190933.4A
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German (de)
French (fr)
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EP3428533A1 (en
Inventor
Elmar Ströhle
Peter Wickelmaier
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Truma Geraetetechnik GmbH and Co KG
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Truma Geraetetechnik GmbH and Co KG
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Priority to SI200832172T priority Critical patent/SI3428533T1/en
Publication of EP3428533A1 publication Critical patent/EP3428533A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J11/00—Devices for conducting smoke or fumes, e.g. flues 
    • F23J11/04—Devices for conducting smoke or fumes, e.g. flues  in locomotives; in road vehicles; in ships
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L17/00—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/005—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues using fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L17/00—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/02—Tops for chimneys or ventilating shafts; Terminals for flues
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L17/00—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/16—Induction apparatus, e.g. steam jet, acting on combustion products beyond the fire
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2211/00—Flue gas duct systems
    • F23J2211/10—Balanced flues (combining air supply and flue gas exhaust)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2211/00—Flue gas duct systems
    • F23J2211/30—Chimney or flue associated with building ventilation system

Definitions

  • the invention relates to an exhaust gas device for burner heating in a mobile room.
  • the invention relates to a safety device for the operation of heating devices or other devices with gas or liquid fuel burners, which are used in living or passenger rooms (interiors, mobile rooms) by mobile devices.
  • living or passenger rooms interiors, mobile rooms
  • mobile devices Such mobile spaces are found in particular in caravans, motor homes or boats.
  • Atmospheric burners draw their combustion air automatically from the immediate vicinity. Since the burners for the above-mentioned applications, especially in caravans or motor homes, must be independent of ambient air, the burners are usually arranged directly on an outer wall or on the floor inside the passenger compartment and connected to the environment via an opening in order to deliver combustion air from there Respectively.
  • the combustion air is fed to the burner and mixed with the fuel, e.g. liquid gas or liquid fuel, in the burner.
  • the exhaust gas is usually routed to the roof via a flexible pipe and from there to the outside by means of a chimney section.
  • the hot exhaust gases create a chimney effect, which keeps the exhaust gases in motion automatically. Due to the suction of the chimney effect, there is always a slight negative pressure in the exhaust pipe, which prevents exhaust gases from escaping from the exhaust pipe, especially at interfaces or sealing joints. In this way it can be achieved that no exhaust gas can get into the installation space or the passenger compartment. Further safety devices are then not required.
  • the combustion air supplied to the burner on the one hand and the exhaust gases to be discharged on the other hand are conveyed with the aid of a combustion air fan.
  • This allows greater freedom in setting up and assembling the devices.
  • the exhaust gases can also be discharged from the device and the interior space at the installation height of the device via a side wall chimney without the atmospheric effect (chimney effect) described above being important.
  • the combustion air fan is arranged in the device, with the result that the exhaust gas is discharged with the aid of an overpressure in the exhaust gas line located downstream of the combustion air fan.
  • the combustion air temperature is strongly linked to the exhaust gas temperature, since the tube-in-tube construction corresponds to a tube heat exchanger.
  • the combustion air fan In order to compensate for the resulting fluctuations in volume flow, the combustion air fan must be regulated depending on the combustion air temperature.
  • an exhaust gas device is described, with an exhaust gas duct which is enclosed in the region of its outlet by an air duct, into which air is blown by a fan.
  • an exhaust device for apartments in which a vertical air duct encloses an exhaust duct. At the outlet opening of the air duct, a blower device is provided which conveys the air into the environment.
  • the invention is based on the object of specifying an exhaust gas device in which reliable operation of heating devices or other devices with gas or liquid fuel burners is achieved, but in which the influence of the exhaust gas temperature is reduced.
  • An exhaust gas device for a combustion device that is located in a mobile space has: an exhaust gas duct for guiding exhaust gas from the combustion device into the environment, an air duct which at least partially surrounds the exhaust gas duct and is open to the environment, and one arranged in the air duct Blower device for generating an air flow in the air duct.
  • the air flow in the air duct has a flow direction towards the environment. In particular, the air flow in the air duct can be guided from the combustion device to the environment.
  • the exhaust device has a safety device to ensure that any exhaust gas is discharged from the interior.
  • the air channel is thus arranged close to or closely adjacent to the exhaust gas channel and surrounds the exhaust gas channel at least in areas where exhaust gas can exit from the exhaust gas channel, e.g. via separating or connecting surfaces or joints.
  • the blower device ensures an air flow in the direction of the surroundings, so that exhaust gas that has undesirably escaped from the exhaust gas duct and has entered the air duct can be safely discharged to the surroundings.
  • the air flow in the air duct is independent of the supply of combustion air. Rather, a separate combustion air duct is provided for the combustion air supply, which can be arranged separately or integrated into the exhaust gas device.
  • the air duct and / or the exhaust duct can be composed of several duct elements. It is common for such ducts or air ducts to be plugged together, e.g. from dimensionally stable pipe elements and flexible hoses or pipes. Channel elements can, however, also be air ducts or air channels in geometries in burner heating systems.
  • the air duct should therefore surround the exhaust gas duct at least in an area in which a sealing joint is provided between two duct elements in the exhaust gas duct. It has been found in practice that, due to the overpressure prevailing in the exhaust gas duct, it cannot be prevented that exhaust gas repeatedly searches for routes through which it can escape in an undesired manner. Sealing joints of this type are understandably particularly suitable for this purpose. It can therefore be expedient to design the air duct in such a way that the exhaust gas exiting at the respective sealing joint passes through the air duct to the environment, i.e. to the outside of the room to be heated.
  • the term environment should always be understood in this sense in the following.
  • the air duct completely surrounds the exhaust gas duct radially and at least in one section axially.
  • the radial enclosing of the exhaust gas duct by the air duct leads to a pipe-in-pipe arrangement, in which it is ensured that any exhaust gas that unexpectedly leaves the exhaust gas duct is taken up by the air duct and discharged.
  • the section should be selected in such a way that there is no further possibility for the exhaust gas to escape from the exhaust gas duct in an uncontrolled manner.
  • the air duct can be designed as an overtube and completely enclose the exhaust duct designed as an exhaust pipe on the circumference.
  • the air duct can have a negative pressure section (suction section) located upstream from the blower device and an overpressure section located downstream from the blower device.
  • a negative pressure section suction section
  • an overpressure section located downstream from the blower device.
  • the downstream overpressure section should only serve to release the air guided in the air duct and, if necessary, the exhaust gas components that have emerged from the exhaust duct to the outside into the environment.
  • the negative pressure section and the positive pressure section are at least partially arranged axially to one another. This enables a particularly compact arrangement of the underpressure and overpressure sections.
  • the underpressure section and the overpressure section can then be separated from one another by a partition and thereby placed axially very close to one another in order to save installation space.
  • the vacuum section is arranged at least partially coaxially to the exhaust gas duct and at least partially surrounds the exhaust gas duct radially.
  • the overpressure section can be arranged at least partially coaxially to the exhaust gas duct and at least partially surround the exhaust gas duct radially. This allows the tube-in-tube construction specified above to be implemented.
  • the exhaust gas duct and the overpressure section of the air duct each have an opening that leads into a common mixing area. This makes it possible for the hot exhaust gas to be mixed with the cooler air of the air duct in the mixing region in order to lower the exhaust gas temperature. It has been found that an exhaust gas temperature of initially 200 to 300 ° C is lowered to a temperature value of below 150 ° C by mixing with the air from the air duct.
  • the mouth of the air duct and the mouth of the exhaust duct can directly adjoin one another in order to effectively support the mixing of the air flow with the exhaust gas flow.
  • the mouth of the air duct can surround the mouth of the exhaust gas duct radially, i.e. over the entire circumference.
  • a cooler protective jacket is initially formed from the air flow of the air duct, which surrounds the hotter exhaust duct on the inside.
  • the fan device can be arranged in the vicinity of the mouth of the air duct.
  • the mouth of the air duct also corresponds to the end of the air duct. It is desirable that the fan device is placed as close as possible to the end of the air duct in order to achieve the largest possible negative pressure section upstream of the fan device. Only the negative pressure section is suitable for taking up exhaust gas escaping from the exhaust gas duct.
  • the length of the overpressure section should be minimal in relation to the interior, that is to say as short as possible.
  • the mixing area can be separated from the surroundings by an outlet grille.
  • the outlet grille is arranged towards the environment and prevents the ingress of dirt, rainwater, etc. It also represents a safety device that prevents the hot exhaust gas stream emerging at the mouth of the exhaust gas duct from causing damage to people and the environment.
  • the part of the exhaust gas duct adjoining the mouth, the overpressure section, part of the negative pressure section and the fan device can form a structural unit.
  • both the exhaust gas duct and the vacuum section are usually formed by a plurality of pipe elements which are plugged together or fixed to one another in a suitable manner.
  • the Farthest downstream parts of the exhaust gas duct and the negative pressure section can, together with the fan device and the relatively short positive pressure section, form the structural unit which can be very easily assembled as a whole.
  • the structural unit can preferably be mounted from the outside on a vehicle wall if the exhaust device is used in a vehicle, such as a caravan or a motor home. This results in better sealing options.
  • a heating system can be equipped with the exhaust gas device described, the combustion device being provided in a heating device with a combustion chamber and the exhaust gas duct leading an exhaust gas flow from the combustion chamber to the environment.
  • the heating system can be suitable for heating air or water.
  • the heating system can be used in a mobile unit, in particular a caravan or a motor home or a boat.
  • the air duct can run between the heating device and the environment and can adjoin at least a part of the combustion device in the area of the heating device. This makes it possible for exhaust gas that escapes directly at the combustion device or in the heating device, that is to say before it enters the exhaust gas duct, to be discharged through the air duct.
  • An exhaust pipe 1 serving as an exhaust duct is surrounded on the circumference by an air duct 2.
  • the air duct 2 is divided into a negative pressure section 2a and a positive pressure section 2b.
  • the negative pressure section 2a and the positive pressure section 2b surround the exhaust pipe 1 on the circumference.
  • a radial fan 3 serving as a fan device is arranged, which sucks air from the negative pressure section 2a and presses it into the positive pressure section 2b. Accordingly, an air flow with the flow direction A (see arrow) is created in the air duct.
  • the radial fan 3 is driven by a fan motor 4.
  • the exhaust pipe 1 leads into the interior of, for example, a living room or passenger compartment in a caravan, motor home or boat or the like to a burner (burner) of a heating device, not shown, which is located to the left of the in the Figures 1 and 2 would be arranged exhaust device shown. Accordingly, exhaust gas flows in the direction of arrow B in front of the combustion device in the exhaust pipe 1 and exits at an opening 5 from the exhaust pipe 1 to enter into the Figures 1 and 2 the outside area on the right.
  • the mouth 5 is protected by an outlet grille 6 which, on the one hand, is intended to prevent moisture or dirt from entering the exhaust pipe and, on the other hand, is intended to prevent the exhaust gas from flowing directly into the environment.
  • a mixing region 7 is formed, into which the overpressure section 2b also opens via an opening 8.
  • the hot exhaust gas from the exhaust pipe 1 thus mixes with the cooler air blown out by the radial fan 3 via the overpressure section 2b.
  • the exhaust gas temperature is significantly reduced, so that the exhaust gas can finally exit into the environment via the outlet grille 6 at a lower, non-critical temperature.
  • the negative pressure section 2a of the air duct 2 which is considerably longer in relation to the overpressure section 2b, largely surrounds the exhaust pipe 1 completely. So is in the Figures 1 and 2 only a plastic nozzle of the vacuum section 2a is shown, on the upstream end of which, for example, a flexible tube can be pushed, which is finally led to the heating device or the burner device, not shown.
  • the entire vacuum section 2a should therefore be designed in such a way that it surrounds all areas of the exhaust pipe 1, but also, if necessary, of the burner in the heating device. It is important to ensure that exhaust gas can escape from pressure surges at various points in the heating device when the heating device is started and can lead to impairment in the interior. Accordingly, it must be ensured that all sealing joints, separating joints, openings, etc., at which exhaust gas can escape in an uncontrolled manner at a corresponding overpressure in the system, are surrounded by the negative pressure section 2a or are in flow connection with it. In this way, the exhaust gas escaping undesirably from the exhaust pipe 1 and other units is sucked off via the negative pressure section 2a due to the action of the radial fan 3 and finally blown out into the environment via the positive pressure section 2b.
  • the underpressure section 2a and the overpressure section 2b are arranged axially in alignment with one another at least in a certain area.
  • a partition 9 is provided, which serves as a bulkhead and separates the negative pressure section 2a from the positive pressure section 2b.
  • the partition wall 9 can be formed in one piece with the exhaust pipe 1.
  • Both the air duct 2 and the exhaust pipe 1 can be formed from several sub-elements, even if, for example, the exhaust pipe 1 is only shown as one piece in the figures. It should be noted, however, that the exhaust pipe 1 will have a significantly greater length in the direction of the combustion device than is shown in the figures.
  • the entire exhaust device can - as in the Figures 1 and 2 - be used as a unit in a vehicle wall 10 of a caravan or motorhome or other mobile device.
  • a built-in shell made of a robust and impact-resistant plastic is provided, into which the components can be inserted or to which the components can be attached.
  • this also includes the exhaust pipe 1 and elements of the air duct 2.
  • the air discharged via the air duct 2 not only ensures safe discharge of undesired exhaust gas.
  • the combustion device or the heating device there is the possibility of effectively cooling critical areas.
  • Fig. 3 shows the external view with the outlet grille 6, which is placed on the vehicle wall 10.
  • Fig. 4 shows the rear view of the exhaust device from the inside.
  • an inflow connection 11 can be seen in particular, via which fresh air from the surroundings can be fed as combustion air to the combustion device.
  • the fresh air supplied via the inflow connection 11 is mixed in a known manner with fuel (liquid gas, liquid fuel) and burned. This ensures that the combustion air used for combustion is not supplied from the interior to be heated, but from the environment.
  • the inflow connection 11 is thus part of a combustion air duct which is provided in addition to the air duct 2. While the air flows in the air duct 2 towards the environment, the air flows in the combustion air duct (not shown in more detail in the figures) from the environment into the interior.
  • the inflow stub 11 is integrated into the structural unit of the exhaust gas device described above.
  • Fig. 5 shows a sectional view of the radial fan 3 and the fan motor 4 in the installed state in the vehicle wall 10, analogous to the other figures.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Description

Die Erfindung betrifft eine Abgasvorrichtung für eine Brennerheizung in einem mobilen Raum.The invention relates to an exhaust gas device for burner heating in a mobile room.

Insbesondere betrifft die Erfindung eine Sicherheitsvorrichtung für den Betrieb von Heizgeräten oder anderen Geräten mit Gas- oder Flüssigkraftstoffbrennern, die in Wohn- oder Fahrgasträumen (Innenräume, mobilen Räume) von mobilen Einrichtungen eingesetzt werden. Derartige mobile Räume finden sich insbesondere in Wohnwagen, Reisemobilen oder Booten.In particular, the invention relates to a safety device for the operation of heating devices or other devices with gas or liquid fuel burners, which are used in living or passenger rooms (interiors, mobile rooms) by mobile devices. Such mobile spaces are found in particular in caravans, motor homes or boats.

Für Heizgeräte werden allgemein zwei Bauarten von Brennern unterschieden, nämlich atmosphärische Brenner und Gebläsebrenner.A distinction is generally made between two types of burners for heating devices, namely atmospheric burners and forced draft burners.

Atmosphärische Brenner beziehen ihre Verbrennungsluft selbsttätig aus der direkten Umgebung. Da die Brenner für die oben genannten Anwendungsfälle, insbesondere in Wohnwagen oder Reisemobilen, raumluftunabhängig sein müssen, werden die Brenner meist direkt an einer Außenwand bzw. am Boden im Inneren der Fahrgastzelle angeordnet und über einen Durchbruch mit der Umgebung verbunden, um von dort Verbrennungsluft zu beziehen. Die Verbrennungsluft wird dem Brenner zugeführt und im Brenner mit dem Brennstoff, z.B. Flüssiggas oder Flüssigkraftstoff vermischt.Atmospheric burners draw their combustion air automatically from the immediate vicinity. Since the burners for the above-mentioned applications, especially in caravans or motor homes, must be independent of ambient air, the burners are usually arranged directly on an outer wall or on the floor inside the passenger compartment and connected to the environment via an opening in order to deliver combustion air from there Respectively. The combustion air is fed to the burner and mixed with the fuel, e.g. liquid gas or liquid fuel, in the burner.

Das Abgas wird in der Regel über ein flexibles Rohr zum Dach und dort mittels eines Kaminteils nach außen geführt. Aufgrund der heißen Abgase entsteht ein Kamineffekt, der eine selbsttätige Abfuhr der Abgase in Gang hält. Durch den Sog des Kamineffekts herrscht im Abgasrohr immer ein geringer Unterdruck, der ein Austreten von Abgasen aus dem Abgasrohr insbesondere auch an Schnittstellen bzw. Dichtfugen verhindert. Auf diese Weise kann erreicht werden, dass kein Abgas in den Einbauraum bzw. die Fahrgastzelle gelangen kann. Weitere Sicherheitseinrichtungen sind dann nicht erforderlich.The exhaust gas is usually routed to the roof via a flexible pipe and from there to the outside by means of a chimney section. The hot exhaust gases create a chimney effect, which keeps the exhaust gases in motion automatically. Due to the suction of the chimney effect, there is always a slight negative pressure in the exhaust pipe, which prevents exhaust gases from escaping from the exhaust pipe, especially at interfaces or sealing joints. In this way it can be achieved that no exhaust gas can get into the installation space or the passenger compartment. Further safety devices are then not required.

Bei Gebläsebrennern wird die dem Brenner zugeführte Verbrennungsluft einerseits und die abzuführenden Abgase andererseits mit Hilfe eines Verbrennungsluftgebläses gefördert. Dadurch können größere Freiheiten bei Aufbau und Montage der Geräte erreicht werden. Z.B. können die Abgase über einen Seitenwandkamin auch auf Einbauhöhe des Geräts aus dem Gerät und dem Innenraum abgeführt werden, ohne dass es auf die oben geschilderte atmosphärische Wirkung (Kamineffekt) ankommt.In the case of fan burners, the combustion air supplied to the burner on the one hand and the exhaust gases to be discharged on the other hand are conveyed with the aid of a combustion air fan. This allows greater freedom in setting up and assembling the devices. For example, the exhaust gases can also be discharged from the device and the interior space at the installation height of the device via a side wall chimney without the atmospheric effect (chimney effect) described above being important.

Bei bekannten Gebläsebrennern ist das Verbrennungsluftgebläse im Gerät angeordnet, was zur Folge hat, dass das Abgas mit Hilfe eines Überdrucks in der stromab von dem Verbrennungsluftgebläse liegenden Abgasleitung abgeführt wird. Dadurch besteht die Gefahr, dass bei einem Leck im Abgasrohr oder an einer Anschlussstelle des Abgasrohrs Abgase austreten und im schlimmsten Fall in den zu beheizenden Innenraum gelangen können.In known fan burners, the combustion air fan is arranged in the device, with the result that the exhaust gas is discharged with the aid of an overpressure in the exhaust gas line located downstream of the combustion air fan. As a result, there is a risk that, in the event of a leak in the exhaust pipe or at a connection point of the exhaust pipe, exhaust gases may escape and, in the worst case, get into the interior to be heated.

Bei bekannten Geräten wird dieser Gefahr dadurch entgegengetreten, dass die dem Brenner zuzuführende Verbrennungsluft über ein zweites Rohr angesaugt wird, welches als Überrohr über dem Abgasrohr in Form einer Rohr-in-Rohr-Konstruktion angeordnet ist. Beim Ansaugen der Verbrennungsluft wird ein Unterdruck im Überrohr erzeugt, so dass bei einer Leckage des innenliegenden Abgasrohres die Abgase automatisch mit der Verbrennungsluft abgesaugt werden. Bei einem größeren Leck erlischt der Brenner selbstständig, da durch das Ansaugen von Abgasen der Frischluftanteil unter den erforderlichen Wert sinkt. Bei einer kleineren Leckage ändert sich hingegen lediglich der CO2-Wert im Abgas.In known devices, this risk is countered in that the combustion air to be supplied to the burner is sucked in via a second pipe, which is arranged as a cover pipe over the exhaust pipe in the form of a pipe-in-pipe construction. When the combustion air is sucked in, a negative pressure is generated in the overpipe, so that in the event of a leak in the internal exhaust pipe, the exhaust gases are automatically extracted with the combustion air. In the event of a larger leak, the burner goes out automatically, as the intake of exhaust gases causes the proportion of fresh air to drop below the required value. In the case of a smaller leak, on the other hand, only the CO 2 value in the exhaust gas changes.

Die Gebläsebrenner und der oben beschriebene Rohr-in-Rohr-Aufbau haben sich in der Praxis bewährt. Insbesondere wird durch die genannten Konstruktionsmerkmale ein Aufbau mit hohem Sicherheitsstandard erreicht.The forced draft burners and the tube-in-tube construction described above have proven themselves in practice. In particular, the design features mentioned achieve a structure with a high safety standard.

Jedoch ist die Verbrennungslufttemperatur bei dem beschriebenen Aufbau stark an die Abgastemperatur gekoppelt, da der Rohr-in-Rohr-Aufbau einem Rohr-Wärmetauscher entspricht. Um die dadurch entstehenden Volumenstromschwankungen zu kompensieren, muss das Verbrennungsluftgebläse abhängig von der Verbrennungslufttemperatur geregelt werden.However, in the construction described, the combustion air temperature is strongly linked to the exhaust gas temperature, since the tube-in-tube construction corresponds to a tube heat exchanger. In order to compensate for the resulting fluctuations in volume flow, the combustion air fan must be regulated depending on the combustion air temperature.

In der FR 995 035 A wird eine Abgasvorrichtung beschrieben, mit einem Abgaskanal, der im Bereich seines Auslasses von einem Luftkanal umschlossen ist, in den Luft von einem Gebläse eingeblasen wird.In the FR 995 035 A an exhaust gas device is described, with an exhaust gas duct which is enclosed in the region of its outlet by an air duct, into which air is blown by a fan.

Aus der EP 1 541 925 A1 ist eine Abgasvorrichtung für Wohnungen bekannt, bei der ein vertikaler Luftkanal einen Abgaskanal umschließt. An der Austrittsöffnung des Luftkanals ist eine Gebläseeinrichtung vorgesehen, die die Luft in die Umgebung fördert.From the EP 1 541 925 A1 an exhaust device for apartments is known in which a vertical air duct encloses an exhaust duct. At the outlet opening of the air duct, a blower device is provided which conveys the air into the environment.

Der Erfindung liegt die Aufgabe zugrunde, eine Abgasvorrichtung anzugeben, bei der ebenfalls ein sicherer Betrieb von Heizgeräten oder anderen Geräten mit Gas- oder Flüssigkraftstoffbrennern erreicht wird, bei dem jedoch der Einfluss der Abgastemperatur verringert wird.The invention is based on the object of specifying an exhaust gas device in which reliable operation of heating devices or other devices with gas or liquid fuel burners is achieved, but in which the influence of the exhaust gas temperature is reduced.

Die Aufgabe wird erfindungsgemäß durch eine Abgasvorrichtung nach Anspruch 1 gelöst. Vorteilhafte Weiterentwicklungen sind in den abhängigen Ansprüchen angegeben.The object is achieved according to the invention by an exhaust gas device according to claim 1. Advantageous further developments are given in the dependent claims.

Eine Abgasvorrichtung für eine Brenneinrichtung, die in einem mobilen Raum sich befindet weist auf: einen Abgaskanal zum Führen von Abgas von der Brenneinrichtung in die Umgebung, einen Luftkanal, der den Abgaskanal wenigstens teilweise umgibt und zur Umgebung hin geöffnet ist sowie eine in dem Luftkanal angeordnete Gebläseeinrichtung zum Erzeugen einer Luftströmung in dem Luftkanal. Die Luftströmung in dem Luftkanal weist eine Strömungsrichtung zur Umgebung hin auf. Insbesondere kann die Luftströmung in dem Luftkanal von der Brenneinrichtung zur Umgebung hin geführt werden.An exhaust gas device for a combustion device that is located in a mobile space has: an exhaust gas duct for guiding exhaust gas from the combustion device into the environment, an air duct which at least partially surrounds the exhaust gas duct and is open to the environment, and one arranged in the air duct Blower device for generating an air flow in the air duct. The air flow in the air duct has a flow direction towards the environment. In particular, the air flow in the air duct can be guided from the combustion device to the environment.

Die Abgasvorrichtung weist eine Sicherheitsvorrichtung auf, um das Abführen jeglichen Abgases aus dem Innenraum sicherzustellen.The exhaust device has a safety device to ensure that any exhaust gas is discharged from the interior.

Der Luftkanal ist somit nahe oder dicht benachbart an dem Abgaskanal angeordnet und umgibt den Abgaskanal wenigstens in Bereichen, an denen aus dem Abgaskanal Abgas, z.B. über Trenn- oder Anschlussflächen bzw. -fugen austreten kann. Die Gebläseeinrichtung stellt eine Luftströmung in Richtung zur Umgebung sicher, so dass aus dem Abgaskanal unerwünscht ausgetretenes und in den Luftkanal gelangtes Abgas sicher zur Umgebung abgeführt werden kann.The air channel is thus arranged close to or closely adjacent to the exhaust gas channel and surrounds the exhaust gas channel at least in areas where exhaust gas can exit from the exhaust gas channel, e.g. via separating or connecting surfaces or joints. The blower device ensures an air flow in the direction of the surroundings, so that exhaust gas that has undesirably escaped from the exhaust gas duct and has entered the air duct can be safely discharged to the surroundings.

Die Luftströmung im Luftkanal ist unabhängig von einer Zuführung der Verbrennungsluft. Vielmehr ist für die Verbrennungsluftzuführung ein eigener Verbrennungsluftkanal vorgesehen, der separat angeordnet oder in die Abgasvorrichtung mit integriert werden kann.The air flow in the air duct is independent of the supply of combustion air. Rather, a separate combustion air duct is provided for the combustion air supply, which can be arranged separately or integrated into the exhaust gas device.

Der Luftkanal und/oder der Abgaskanal können aus mehreren Kanalelementen zusammengesetzt sein. Es ist üblich, dass derartige Kanäle bzw. Luftführungen z.B. aus formstabilen Rohrelementen und flexiblen Schläuchen bzw. Rohren zusammengesteckt werden. Kanalelemente können aber auch Luftführungen oder Luftkanäle in Geometrien in Brennerheizungen sein.The air duct and / or the exhaust duct can be composed of several duct elements. It is common for such ducts or air ducts to be plugged together, e.g. from dimensionally stable pipe elements and flexible hoses or pipes. Channel elements can, however, also be air ducts or air channels in geometries in burner heating systems.

Beim Zusammensetzen von Kanalelementen ergeben sich Trenn- bzw. Dichtfugen, an denen Abgas austreten kann. Daher sollte der Luftkanal den Abgaskanal wenigstens in einem Bereich umgeben, an dem in dem Abgaskanal eine Dichtfuge zwischen zwei Kanalelementen vorgesehen ist. Es hat sich in der Praxis herausgestellt, dass es sich aufgrund des im Abgaskanal herrschenden Überdrucks nicht verhindern lässt, dass Abgas sich immer wieder Wege sucht, an denen es unerwünscht austreten kann. Dazu eignen sich verständlicherweise insbesondere derartige Dichtfugen. Daher kann es zweckmäßig sein, den Luftkanal derart zu gestalten, dass das an der jeweiligen Dichtfuge austretenden Abgas über den Luftkanal zur Umgebung, also zur Außenseite des zu beheizenden Raums hin abgeführt wird. Der Begriff Umgebung soll im Folgenden immer in diesem Sinne verstanden werden.When the duct elements are assembled, there are separating or sealing joints at which exhaust gas can escape. The air duct should therefore surround the exhaust gas duct at least in an area in which a sealing joint is provided between two duct elements in the exhaust gas duct. It has been found in practice that, due to the overpressure prevailing in the exhaust gas duct, it cannot be prevented that exhaust gas repeatedly searches for routes through which it can escape in an undesired manner. Sealing joints of this type are understandably particularly suitable for this purpose. It can therefore be expedient to design the air duct in such a way that the exhaust gas exiting at the respective sealing joint passes through the air duct to the environment, i.e. to the outside of the room to be heated. The term environment should always be understood in this sense in the following.

Bei einer Ausführungsform umgibt der Luftkanal den Abgaskanal radial vollständig und axial wenigstens in einem Abschnitt. Das radiale Umschließen des Abgaskanals durch den Luftkanal führt zu einer Rohr-in-Rohr-Anordnung, bei der sichergestellt wird, dass jegliches Abgas, dass den Abgaskanal in unvorhergesehener Weise verlässt, vom Luftkanal aufgenommen und abgeführt wird. Dementsprechend sollte der Abschnitt so gewählt werden, dass es für das Abgas keine weitere Möglichkeit gibt, unkontrolliert aus dem Abgaskanal zu entweichen. Bei dieser Rohr-in-Rohr-Konstruktion erfolgt dann die Luftströmung nicht, wie beim Stand der Technik, von der Umgebung zum Brenner, sondern umgekehrt, hin zur Umgebung.In one embodiment, the air duct completely surrounds the exhaust gas duct radially and at least in one section axially. The radial enclosing of the exhaust gas duct by the air duct leads to a pipe-in-pipe arrangement, in which it is ensured that any exhaust gas that unexpectedly leaves the exhaust gas duct is taken up by the air duct and discharged. Accordingly, the section should be selected in such a way that there is no further possibility for the exhaust gas to escape from the exhaust gas duct in an uncontrolled manner. With this tube-in-tube construction, the air flow does not then take place, as in the prior art, from the environment to the burner, but vice versa, to the environment.

Insbesondere kann der Luftkanal als Überrohr ausgebildet sein und den als Abgasrohr gestalteten Abgaskanal vollständig am Umfang umschließen.In particular, the air duct can be designed as an overtube and completely enclose the exhaust duct designed as an exhaust pipe on the circumference.

Der Luftkanal kann einen stromauf von der Gebläseeinrichtung liegenden Unterdruckabschnitt (Saugabschnitt) und einen stromab von der Gebläseeinrichtung liegenden Überdruckabschnitt aufweisen. Für die Gewährleistung der Sicherheit ist es zweckmäßig, wenn der Unterdruckabschnitt an den Abgaskanal herangeführt ist und austretendes Abgas aufnehmen kann. Der stromabliegende Überdruckabschnitt sollte lediglich zum Abgeben der im Luftkanal geführten Luft und gegebenenfalls der aus dem Abgaskanal ausgetretenen Abgasbestandteile nach außen an die Umgebung dienen.The air duct can have a negative pressure section (suction section) located upstream from the blower device and an overpressure section located downstream from the blower device. To ensure safety, it is expedient if the negative pressure section is brought up to the exhaust gas duct and can absorb emerging exhaust gas. The downstream overpressure section should only serve to release the air guided in the air duct and, if necessary, the exhaust gas components that have emerged from the exhaust duct to the outside into the environment.

Bei der Erfindung sind der Unterdruckabschnitt und der Uberdruckabschnitt wenigstens teilweise axial zueinander angeordnet. Dies ermöglicht eine besonders kompakte Anordnung von Unterdruck- und Überdruckabschnitt.In the invention, the negative pressure section and the positive pressure section are at least partially arranged axially to one another. This enables a particularly compact arrangement of the underpressure and overpressure sections.

Der Unterdruckabschnitt und der Überdruckabschnitt können dann durch eine Trennwand voneinander getrennt sein und dadurch räumlich sehr nah zueinander axial platziert werden, um Bauraum zu sparen.The underpressure section and the overpressure section can then be separated from one another by a partition and thereby placed axially very close to one another in order to save installation space.

Erfindungsgemäß ist der Unterdruckabschnitt wenigstens teilweise koaxial zu dem Abgaskanal angeordnet und gibt den Abgaskanal wenigstens teilweise radial um. Der Uberdruckabschnitt kann wenigstens teilweise koaxial zu dem Abgaskanal angeordnet sein und den Abgaskanal wenigstens teilweise radial umgeben. Dadurch lässt sich die oben angegebene Rohr-in-Rohr-Konstruktion realisieren.According to the invention, the vacuum section is arranged at least partially coaxially to the exhaust gas duct and at least partially surrounds the exhaust gas duct radially. The overpressure section can be arranged at least partially coaxially to the exhaust gas duct and at least partially surround the exhaust gas duct radially. This allows the tube-in-tube construction specified above to be implemented.

Bei einer Variante weisen der Abgaskanal und der Überdruckabschnitt des Luftkanals jeweils eine Mündung auf, die in einen gemeinsamen Mischbereich führt. Dadurch ist es möglich, dass in dem Mischbereich das heiße Abgas mit der kühleren Luft des Luftkanals gemischt wird, um somit die Abgastemperatur zu senken. Es hat sich herausgestellt, dass eine Abgastemperatur von zunächst 200 bis 300 °C durch die Mischung mit der Luft aus dem Luftkanal auf einen Temperaturwert von unter 150 °C abgesenkt wird.In a variant, the exhaust gas duct and the overpressure section of the air duct each have an opening that leads into a common mixing area. This makes it possible for the hot exhaust gas to be mixed with the cooler air of the air duct in the mixing region in order to lower the exhaust gas temperature. It has been found that an exhaust gas temperature of initially 200 to 300 ° C is lowered to a temperature value of below 150 ° C by mixing with the air from the air duct.

Die Mündung des Luftkanals und die Mündung des Abgaskanals können unmittelbar aneinander angrenzen, um die Mischung des Luftstroms mit dem Abgasstrom wirkungsvoll zu unterstützen.The mouth of the air duct and the mouth of the exhaust duct can directly adjoin one another in order to effectively support the mixing of the air flow with the exhaust gas flow.

Insbesondere kann die Mündung des Luftkanals die Mündung des Abgaskanals radial, d.h. über den gesamten Umfang umgeben. Dadurch bildet sich zunächst auch ein kühlerer Schutzmantel aus dem Luftstrom des Luftkanals, der den innenliegenden heißeren Abgaskanal umgibt.In particular, the mouth of the air duct can surround the mouth of the exhaust gas duct radially, i.e. over the entire circumference. As a result, a cooler protective jacket is initially formed from the air flow of the air duct, which surrounds the hotter exhaust duct on the inside.

Die Gebläseeinrichtung kann in der Nähe der Mündung des Luftkanals angeordnet sein. Die Mündung des Luftkanals entspricht gleichzeitig auch dem Ende des Luftkanals. Es ist anzustreben, dass die Gebläseeinrichtung möglichst nahe am Ende des Luftkanals platziert ist, um stromauf von der Gebläseeinrichtung einen möglichst großen Unterdruckabschnitt zu erreichen. Nur der Unterdruckabschnitt ist geeignet, entweichendes Abgas aus dem Abgaskanal aufzunehmen.The fan device can be arranged in the vicinity of the mouth of the air duct. The mouth of the air duct also corresponds to the end of the air duct. It is desirable that the fan device is placed as close as possible to the end of the air duct in order to achieve the largest possible negative pressure section upstream of the fan device. Only the negative pressure section is suitable for taking up exhaust gas escaping from the exhaust gas duct.

Dementsprechend sollte die Länge des Überdruckabschnitts minimal im Bezug auf den Innenraum, also möglichst gering sein.Accordingly, the length of the overpressure section should be minimal in relation to the interior, that is to say as short as possible.

Der Mischbereich kann von der Umgebung durch ein Austrittsgitter getrennt sein. Das Austrittsgitter ist zur Umgebung hin angeordnet und verhindert das Eindringen von Schmutz, Regenwasser etc. Außerdem stellt es eine Sicherheitseinrichtung dar, die verhindert, dass der an der Mündung des Abgaskanals austretende heiße Abgasstrom Schaden an Mensch und Umgebung anrichten kann.The mixing area can be separated from the surroundings by an outlet grille. The outlet grille is arranged towards the environment and prevents the ingress of dirt, rainwater, etc. It also represents a safety device that prevents the hot exhaust gas stream emerging at the mouth of the exhaust gas duct from causing damage to people and the environment.

Der sich an die Mündung anschließende Teil des Abgaskanals, der Überdruckabschnitt, ein Teil des Unterdruckabschnitts und die Gebläseeinrichtung können eine bauliche Einheit bilden. Sowohl der Abgaskanal als auch der Unterdruckabschnitt werden in der Praxis meist durch mehrere Rohrelemente gebildet, die zusammengesteckt bzw. in geeigneter Weise miteinander fixiert sind. Jeweils die am weitesten stromab liegenden Teile des Abgaskanals und des Unterdruckabschnitts können zusammen mit der Gebläseeinrichtung und dem verhältnismäßig kurzen Überdruckabschnitt die bauliche Einheit bilden, die sehr einfach als Ganzes montiert werden kann.The part of the exhaust gas duct adjoining the mouth, the overpressure section, part of the negative pressure section and the fan device can form a structural unit. In practice, both the exhaust gas duct and the vacuum section are usually formed by a plurality of pipe elements which are plugged together or fixed to one another in a suitable manner. In each case the Farthest downstream parts of the exhaust gas duct and the negative pressure section can, together with the fan device and the relatively short positive pressure section, form the structural unit which can be very easily assembled as a whole.

Vorzugsweise kann die bauliche Einheit von außen an eine Fahrzeug-Wandung montiert werden, wenn die Abgasvorrichtung in einem Fahrzeug, wie z.B. einem Wohnwagen oder einem Reisemobil eingesetzt wird. Dadurch ergeben sich bessere Abdichtmöglichkeiten.The structural unit can preferably be mounted from the outside on a vehicle wall if the exhaust device is used in a vehicle, such as a caravan or a motor home. This results in better sealing options.

Ein Heizungssystem kann mit der beschriebenen Abgasvorrichtung ausgestattet werden, wobei die Brenneinrichtung in einer Heizeinrichtung mit einer Brennkammer vorgesehen ist und der Abgaskanal einen Abgasstrom von der Brennkammer zu der Umgebung führt. Das Heizungssystem kann zum Beheizen von Luft oder von Wasser geeignet sein. Das Heizungssystem kann in einer mobilen Einheit, also insbesondere einem Wohnwagen oder einem Reisemobil oder einem Boot eingesetzt werden.A heating system can be equipped with the exhaust gas device described, the combustion device being provided in a heating device with a combustion chamber and the exhaust gas duct leading an exhaust gas flow from the combustion chamber to the environment. The heating system can be suitable for heating air or water. The heating system can be used in a mobile unit, in particular a caravan or a motor home or a boat.

Der Luftkanal kann zwischen der Heizeinrichtung und der Umgebung verlaufen und im Bereich der Heizeinrichtung wenigstens an einen Teil der Brenneinrichtung angrenzen. Dadurch ist es möglich, dass auch Abgas, das direkt an der Brenneinrichtung bzw. in der Heizeinrichtung, also noch vor Eintreten in den Abgaskanal entweicht, durch den Luftkanal abgeführt wird.The air duct can run between the heating device and the environment and can adjoin at least a part of the combustion device in the area of the heating device. This makes it possible for exhaust gas that escapes directly at the combustion device or in the heating device, that is to say before it enters the exhaust gas duct, to be discharged through the air duct.

Diese und weitere Vorteile und Merkmale der Erfindung werden nachfolgend anhand eines Beispiels unter Zuhilfenahme der begleitenden Figuren näher erläutert. Es zeigen:

Fig. 1
einen senkrechten Schnitt durch eine Abgasvorrichtung;
Fig. 2
einen horizontalen Schnitt durch die Abgasvorrichtung von Fig. 1;
Fig. 3
eine Außenansicht der Abgasvorrichtung;
Fig. 4
eine Innenansicht der Abgasvorrichtung; und
Fig. 5
einen senkrechten Schnitt durch eine Gebläseeinrichtung der Abgasvorrichtung.
These and further advantages and features of the invention are explained in more detail below using an example with the aid of the accompanying figures. Show it:
Fig. 1
a vertical section through an exhaust device;
Fig. 2
a horizontal section through the exhaust device of Fig. 1 ;
Fig. 3
an external view of the exhaust device;
Fig. 4
an inside view of the exhaust device; and
Fig. 5
a vertical section through a fan device of the exhaust device.

Die Figuren 1 bis 5 zeigen jeweils Ansichten und Schnitte der gleichen Abgasvorrichtung. Sie werden daher teilweise gemeinsam beschrieben.The Figures 1 to 5 each show views and sections of the same exhaust device. They are therefore partly described together.

Der generelle Aufbau der Abgasvorrichtung wird nachfolgend insbesondere anhand der Figuren 1 und 2 erläutert.The general structure of the exhaust device is described below in particular on the basis of FIG Figures 1 and 2 explained.

Ein als Abgaskanal dienendes Abgasrohr 1 ist am Umfang von einem Luftkanal 2 umgeben. Der Luftkanal 2 teilt sich in einen Unterdruckabschnitt 2a und einen Überdruckabschnitt 2b auf. Der Unterdruckabschnitt 2a und der Überdruckabschnitt 2b umgeben das Abgasrohr 1 am Umfang. Zwischen dem Unterdruckabschnitt 2a und dem Überdruckabschnitt 2b ist ein als Gebläseeinrichtung dienendes Radialgebläse 3 angeordnet, welches Luft aus dem Unterdruckabschnitt 2a ansaugt und in den Überdruckabschnitt 2b drückt. Dementsprechend entsteht in dem Luftkanal eine Luftströmung mit der Strömungsrichtung A (siehe Pfeil).An exhaust pipe 1 serving as an exhaust duct is surrounded on the circumference by an air duct 2. The air duct 2 is divided into a negative pressure section 2a and a positive pressure section 2b. The negative pressure section 2a and the positive pressure section 2b surround the exhaust pipe 1 on the circumference. Between the negative pressure section 2a and the positive pressure section 2b, a radial fan 3 serving as a fan device is arranged, which sucks air from the negative pressure section 2a and presses it into the positive pressure section 2b. Accordingly, an air flow with the flow direction A (see arrow) is created in the air duct.

Das Radialgebläse 3 wird von einem Gebläsemotor 4 angetrieben.The radial fan 3 is driven by a fan motor 4.

Das Abgasrohr 1 führt in das Innere eines z.B. Wohn- oder Fahrgastraums in einem Wohnwagen, Reisemobil oder Boot oder ähnlichem zu einer Brenneinrichtung (Brenner) einer nicht dargestellten Heizeinrichtung, die links von der in den Figuren 1 und 2 dargestellten Abgasvorrichtung anzuordnen wäre. Dementsprechend strömt Abgas in Pfeilrichtung B vor den Brenneinrichtung in das Abgasrohr 1 und tritt an einer Mündung 5 aus dem Abgasrohr 1 aus, um in die in den Figuren 1 und 2 rechts liegende Außenumgebung zu gelangen.The exhaust pipe 1 leads into the interior of, for example, a living room or passenger compartment in a caravan, motor home or boat or the like to a burner (burner) of a heating device, not shown, which is located to the left of the in the Figures 1 and 2 would be arranged exhaust device shown. Accordingly, exhaust gas flows in the direction of arrow B in front of the combustion device in the exhaust pipe 1 and exits at an opening 5 from the exhaust pipe 1 to enter into the Figures 1 and 2 the outside area on the right.

Die Mündung 5 ist durch ein Austrittsgitter 6 geschützt, das zum einen das Eintreten von Feuchtigkeit oder Schmutz in das Abgasrohr verhindern und zum anderen eine direkte Ausströmung des Abgases in die Umgebung vermeiden soll.The mouth 5 is protected by an outlet grille 6 which, on the one hand, is intended to prevent moisture or dirt from entering the exhaust pipe and, on the other hand, is intended to prevent the exhaust gas from flowing directly into the environment.

Mit Hilfe des Austrittsgitters 6 wird ein Mischbereich 7 gebildet, in den auch der Überdruckabschnitt 2b über eine Mündung 8 einmündet.With the aid of the outlet grille 6, a mixing region 7 is formed, into which the overpressure section 2b also opens via an opening 8.

In dem Mischbereich 7 vermischt sich somit das heiße Abgas aus dem Abgasrohr 1 mit der vom Radialgebläse 3 über den Überdruckabschnitt 2b ausgeblasenen kühleren Luft. Dadurch wird die Abgastemperatur signifikant abgesenkt, so dass das Abgas schließlich mit einer geringeren, unkritischen Temperatur über das Austrittsgitter 6 in die Umgebung austreten kann.In the mixing area 7, the hot exhaust gas from the exhaust pipe 1 thus mixes with the cooler air blown out by the radial fan 3 via the overpressure section 2b. As a result, the exhaust gas temperature is significantly reduced, so that the exhaust gas can finally exit into the environment via the outlet grille 6 at a lower, non-critical temperature.

Der im Verhältnis zu dem Überdruckabschnitt 2b wesentlich längere Unterdruckabschnitt 2a des Luftkanals 2 umgibt das Abgasrohr 1 weitgehend vollständig. So ist in den Figuren 1 und 2 lediglich ein Kunststoffstutzen des Unterdruckabschnitts 2a gezeigt, auf dessen stromauf gelegenes Ende z.B. noch ein flexibles Rohr aufgeschoben werden kann, das schließlich bis zu der nicht gezeigten Heizeinrichtung bzw. der Brenneinrichtung geführt wird.The negative pressure section 2a of the air duct 2, which is considerably longer in relation to the overpressure section 2b, largely surrounds the exhaust pipe 1 completely. So is in the Figures 1 and 2 only a plastic nozzle of the vacuum section 2a is shown, on the upstream end of which, for example, a flexible tube can be pushed, which is finally led to the heating device or the burner device, not shown.

Der gesamte Unterdruckabschnitt 2a sollte daher so gestaltet werden, dass er sämtliche Bereiche des Abgasrohrs 1, aber auch gegebenenfalls noch des Brenners in der Heizeinrichtung umgibt. Dabei ist dabei darauf zu achten, dass insbesondere auch beim Starten der Heizeinrichtung durch Druckstöße Abgas an verschiedenen Stellen der Heizeinrichtung entweichen und zu einer Beeinträchtigung im Innenraum führen kann. Dementsprechend ist sicherzustellen, dass sämtliche Dichtfugen, Trennfugen, Öffnungen etc., an denen Abgas unkontrolliert bei einem entsprechenden Überdruck im System austreten kann, von dem Unterdruckabschnitt 2a umgeben sind bzw. mit diesem in Strömungsverbindung stehen. Auf diese Weise wird das unerwünscht aus dem Abgasrohr 1 und anderen Einheiten austretende Abgas über den Unterdruckabschnitt 2a aufgrund der Wirkung des Radialgebläses 3 abgesaugt und schließlich über den Überdruckabschnitt 2b in die Umgebung ausgeblasen.The entire vacuum section 2a should therefore be designed in such a way that it surrounds all areas of the exhaust pipe 1, but also, if necessary, of the burner in the heating device. It is important to ensure that exhaust gas can escape from pressure surges at various points in the heating device when the heating device is started and can lead to impairment in the interior. Accordingly, it must be ensured that all sealing joints, separating joints, openings, etc., at which exhaust gas can escape in an uncontrolled manner at a corresponding overpressure in the system, are surrounded by the negative pressure section 2a or are in flow connection with it. In this way, the exhaust gas escaping undesirably from the exhaust pipe 1 and other units is sucked off via the negative pressure section 2a due to the action of the radial fan 3 and finally blown out into the environment via the positive pressure section 2b.

Bei der in Fig. 1 gezeigten Ausführungsform sind der Unterdruckabschnitt 2a und der Überdruckabschnitt 2b wenigstens in einem bestimmten Bereich axial zueinander fluchtend angeordnet. Um eine Trennung der Abschnitte zu erreichen, ist eine Trennwand 9 vorgesehen, die als Schott dient und den Unterdruckabschnitt 2a von dem Überdruckabschnitt 2b abtrennt. Die Trennwand 9 kann einstückig mit dem Abgasrohr 1 ausgebildet sein.At the in Fig. 1 The embodiment shown, the underpressure section 2a and the overpressure section 2b are arranged axially in alignment with one another at least in a certain area. In order to achieve a separation of the sections, a partition 9 is provided, which serves as a bulkhead and separates the negative pressure section 2a from the positive pressure section 2b. The partition wall 9 can be formed in one piece with the exhaust pipe 1.

Sowohl der Luftkanal 2 als auch das Abgasrohr 1 können aus mehreren Teilelementen gebildet werden, auch wenn z.B. das Abgasrohr 1 in den Figuren lediglich als ein Stück dargestellt ist. Zu beachten ist jedoch, dass das Abgasrohr 1 in Richtung der Brenneinrichtung eine deutlich größere Länge haben wird, als in den Figuren gezeigt.Both the air duct 2 and the exhaust pipe 1 can be formed from several sub-elements, even if, for example, the exhaust pipe 1 is only shown as one piece in the figures. It should be noted, however, that the exhaust pipe 1 will have a significantly greater length in the direction of the combustion device than is shown in the figures.

Die gesamte Abgasvorrichtung kann - wie in den Figuren 1 und 2 gezeigt - als eine Einheit in eine Fahrzeugwand 10 eines Wohnwagens oder Reisemobils oder einer anderen mobilen Einrichtung eingesetzt werden.The entire exhaust device can - as in the Figures 1 and 2 - be used as a unit in a vehicle wall 10 of a caravan or motorhome or other mobile device.

Dazu ist eine aus einem robusten und schlagzähen Kunststoff hergestellte Einbauschale vorgesehen, in die die Komponenten eingesetzt bzw. an die die Komponenten befestigt werden können. Hierzu gehören neben dem Radialgebläse 3 und dem Gebläsemotor 4 auch das Abgasrohr 1 und Elemente des Luftkanals 2.For this purpose, a built-in shell made of a robust and impact-resistant plastic is provided, into which the components can be inserted or to which the components can be attached. In addition to the radial fan 3 and the fan motor 4, this also includes the exhaust pipe 1 and elements of the air duct 2.

Die über den Luftkanal 2 abgeführte Luft gewährleistet nicht nur ein sicheres Abführen von unerwünscht austretendem Abgas. Zudem besteht auch bei geeigneter Gestaltung der Brenneinrichtung bzw. der Heizeinrichtung die Möglichkeit, kritische Bereiche wirksam zu kühlen.The air discharged via the air duct 2 not only ensures safe discharge of undesired exhaust gas. In addition, even with a suitable design of the combustion device or the heating device, there is the possibility of effectively cooling critical areas.

Fig. 3 zeigt die Außenansicht mit dem Austrittsgitter 6, das auf die Fahrzeugwand 10 aufgesetzt ist. Fig. 3 shows the external view with the outlet grille 6, which is placed on the vehicle wall 10.

Fig. 4 zeigt die rückwärtige Ansicht der Abgasvorrichtung von innen. Fig. 4 shows the rear view of the exhaust device from the inside.

Dabei ist insbesondere ein Einströmstutzen 11 erkennbar, über den Frischluft aus der Umgebung als Verbrennungsluft zu der Brenneinrichtung geführt werden kann. In der Brenneinrichtung wird die über den Einströmstutzen 11 zugeführte Frischluft in bekannter Weise mit Brennstoff (Flüssiggas, Flüssigkraftstoff) vermischt und verbrannt. Dadurch wird erreicht, dass die zur Verbrennung verwendete Verbrennungsluft nicht aus dem zu beheizenden Innenraum, sondern aus der Umgebung zugeführt wird.In this case, an inflow connection 11 can be seen in particular, via which fresh air from the surroundings can be fed as combustion air to the combustion device. In the combustion device, the fresh air supplied via the inflow connection 11 is mixed in a known manner with fuel (liquid gas, liquid fuel) and burned. This ensures that the combustion air used for combustion is not supplied from the interior to be heated, but from the environment.

Der Einströmstutzen 11 ist somit Bestandteil eines Verbrennungsluftkanals, der zusätzlich zu dem Luftkanal 2 vorgesehen ist. Während die Luft in dem Luftkanal 2 zur Umgebung hin strömt, strömt die Luft in dem in den Figuren nicht näher gezeigten Verbrennungsluftkanal aus der Umgebung in das Innere.The inflow connection 11 is thus part of a combustion air duct which is provided in addition to the air duct 2. While the air flows in the air duct 2 towards the environment, the air flows in the combustion air duct (not shown in more detail in the figures) from the environment into the interior.

Bei der Ausführungsform der Fig. 4 ist der Einströmstutzen 11 in die Baueinheit der oben beschriebenen Abgasvorrichtung integriert.In the embodiment of Fig. 4 the inflow stub 11 is integrated into the structural unit of the exhaust gas device described above.

Fig. 5 zeigt zur Ergänzung eine Schnittdarstellung des Radialgebläses 3 und des Gebläsemotors 4 im Einbauzustand in der Fahrzeugwand 10, analog zu den anderen Figuren. Fig. 5 shows a sectional view of the radial fan 3 and the fan motor 4 in the installed state in the vehicle wall 10, analogous to the other figures.

Claims (12)

  1. Flue gas device for a burner unit, which is located in a mobile room; with
    - a flue gas duct (1) for directing flue gas from the burner unit into the surrounding environment;
    - an air duct (2), which surrounds the flue gas duct (1), at least in part, and is open to the surrounding environment; and with
    - a fan unit (3) arranged in the air duct (2) for generating a flow of air in the air duct (2); wherein
    - the air flow in the air duct (2) has a flow direction to the surrounding environment; and wherein
    - the air duct (2) has a low pressure section (2a) upstream of the fan unit (3) and an elevated pressure section (2b) downstream of the fan unit (3);
    characterised in that
    - the low pressure section (2a) is arranged, at least in part, coaxially with the flue gas duct (1) and radially surround the flue gas duct (1), at least in part; and in that
    - the low pressure section (2a) and the elevated pressure section (2b) are arranged, at least in part, in an axial relationship with one another.
  2. Flue gas device according to claim 1, characterised in that, in addition to the air duct (2), a combustion air duct (11) is provided for supplying combustion air from the surrounding environment to the burner unit.
  3. Flue gas device according to one of the claims 1 or 2, characterised in that the air duct (2) surrounds the flue gas duct (1), at least in a zone where a sealing joint is provided between two duct elements in the flue gas duct (1).
  4. Flue gas device according to one of the claims 1 to 3, characterised in that the low pressure section (2a) and the elevated pressure section (2b) are separated from one another by a partition wall (9).
  5. Flue gas device according to one of the claims 1 to 4, characterised in that the elevated pressure section (2b) is arranged, at least in part, coaxially with the flue gas duct (1) and radially surround the flue gas duct (1), at least in part.
  6. Flue gas device according to one of the claims 1 to 5, characterised in that the flue gas duct (1) and the elevated pressure section (2b) of the air duct (2) each have an orifice (5, 8) that leads into a common mixing zone (7);
  7. Flue gas device according to one of the claims1 to 6, characterised in that the length of the low pressure section (2a) is larger in proportion to the length of the elevated pressure section (2b).
  8. Flue gas device according to one of the claims 6 or 7, characterised in that the part of the flue gas duct (1) adjoining the orifice (5), the elevated pressure section, (2b), a part of the low pressure section (2a) and the fan unit (3) form a structural unit.
  9. Flue gas device according to claim 8, characterised in that the structural unit can be mounted from outside or inside on a vehicle wall (10).
  10. Flue gas device according to one of the claims 6 to 9, characterised in that the flue gas duct (1), and in particular the orifice (5, 8), are extended to a side wall region of the mobile room and, in particular, the vehicle.
  11. Flue gas device according to one of the preceding claims, characterised in that, due to the airflow produced by the fan (3), upstream components, in particular the burner unit itself, can be cooled.
  12. Heating system with a flue gas device according to one of the claims1 to 11, characterised in that
    - the burner unit is provided in a heating equipment with a combustion chamber and
    - that the flue gas duct (1) directs a stream of flue gas from the combustion chamber to the surrounding environment.
EP18190933.4A 2007-08-23 2008-07-30 Waste gas device for a combustion device in a vehicle Active EP3428533B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200832172T SI3428533T1 (en) 2007-08-23 2008-07-30 Waste gas device for a combustion device in a vehicle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007039984.9A DE102007039984B4 (en) 2007-08-23 2007-08-23 Exhaust device for a combustion device and a heating system in a vehicle
EP08013686.4A EP2028419B1 (en) 2007-08-23 2008-07-30 Exhaust gas device for a combustion device in a motor vehicle

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP08013686.4A Division-Into EP2028419B1 (en) 2007-08-23 2008-07-30 Exhaust gas device for a combustion device in a motor vehicle
EP08013686.4A Division EP2028419B1 (en) 2007-08-23 2008-07-30 Exhaust gas device for a combustion device in a motor vehicle

Publications (2)

Publication Number Publication Date
EP3428533A1 EP3428533A1 (en) 2019-01-16
EP3428533B1 true EP3428533B1 (en) 2021-07-07

Family

ID=40070886

Family Applications (2)

Application Number Title Priority Date Filing Date
EP08013686.4A Active EP2028419B1 (en) 2007-08-23 2008-07-30 Exhaust gas device for a combustion device in a motor vehicle
EP18190933.4A Active EP3428533B1 (en) 2007-08-23 2008-07-30 Waste gas device for a combustion device in a vehicle

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP08013686.4A Active EP2028419B1 (en) 2007-08-23 2008-07-30 Exhaust gas device for a combustion device in a motor vehicle

Country Status (4)

Country Link
EP (2) EP2028419B1 (en)
DE (1) DE102007039984B4 (en)
ES (2) ES2706544T3 (en)
SI (2) SI2028419T1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU201712794S (en) 2016-11-23 2017-05-23 Dometic Sweden Ab Ventilation and air conditioning apparatus
AU2018366469A1 (en) 2017-11-16 2020-05-21 Dometic Sweden Ab Air conditioning apparatus for recreational vehicles
USD905217S1 (en) 2018-09-05 2020-12-15 Dometic Sweden Ab Air conditioning apparatus
CN111412501B (en) * 2019-01-08 2021-07-16 宁波方太厨具有限公司 Smoke exhaust pipe and balance smoke pipe
IT201900019193A1 (en) 2019-10-17 2021-04-17 Dometic Sweden Ab AIR CONDITIONING APPARATUS FOR RECREATIONAL VEHICLES

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Publication number Priority date Publication date Assignee Title
FR995035A (en) * 1949-07-15 1951-11-26 Smoke evacuation installation on board ships
FR1334908A (en) * 1957-07-16 1963-08-16 Removable device for the evacuation of burnt gases, adaptable to all boilers, with the aim of avoiding the external piping
US3570423A (en) * 1969-04-09 1971-03-16 Myron E Hemmingson Chimney aspirator
IT215959Z2 (en) * 1988-12-23 1991-03-20 Mariani Mario Ati & C GAS APPLIANCE FOR THE PRODUCTION OF HOT WATER AND / OR HEATING OF ENVIRONMENTS
DE9210251U1 (en) * 1992-06-11 1992-10-29 Gebr. Seppelfricke GmbH, 4650 Gelsenkirchen Device for removing exhaust gases from fossil fuel-powered, room-air-independent heating devices
BE1009849A7 (en) * 1996-01-04 1997-10-07 Petrovic Tihomir New chimney draught, gas extraction and ventilation method
GB9723157D0 (en) * 1997-11-04 1998-01-07 Glynwed Consumer & Constructio Flue systems
DE20216502U1 (en) * 2002-10-25 2004-02-26 Joseph Raab Gmbh & Cie. K.G. Gas extraction device for a gas discharge system
FR2863693B1 (en) * 2003-12-11 2006-02-24 Service Nat Dit Gaz De France INSTALLATION OF GAS FLOW LINE, WITH REDUCED SIZE, FOR A HABITABLE ASSEMBLY

Non-Patent Citations (1)

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Title
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Also Published As

Publication number Publication date
EP2028419B1 (en) 2018-10-24
SI2028419T1 (en) 2019-02-28
ES2706544T3 (en) 2019-03-29
EP2028419A2 (en) 2009-02-25
EP2028419A3 (en) 2013-06-19
ES2882519T3 (en) 2021-12-02
SI3428533T1 (en) 2021-11-30
DE102007039984A1 (en) 2009-02-26
EP3428533A1 (en) 2019-01-16
DE102007039984B4 (en) 2015-11-12

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