EP0331969B1 - Arrangement for lowering of flue gas temperature of heating installations - Google Patents

Arrangement for lowering of flue gas temperature of heating installations Download PDF

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Publication number
EP0331969B1
EP0331969B1 EP89102983A EP89102983A EP0331969B1 EP 0331969 B1 EP0331969 B1 EP 0331969B1 EP 89102983 A EP89102983 A EP 89102983A EP 89102983 A EP89102983 A EP 89102983A EP 0331969 B1 EP0331969 B1 EP 0331969B1
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EP
European Patent Office
Prior art keywords
heat exchanger
exhaust gas
guide plate
arrangement
pipe
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89102983A
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German (de)
French (fr)
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EP0331969A3 (en
EP0331969A2 (en
Inventor
Fritz Mohring
Dieter Maisenbacher
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Eberspaecher Climate Control Systems GmbH and Co KG
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J Eberspaecher GmbH and Co KG
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Publication of EP0331969A2 publication Critical patent/EP0331969A2/en
Publication of EP0331969A3 publication Critical patent/EP0331969A3/en
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    • 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
    • F24H9/0052—Details for air heaters
    • F24H9/0057—Guiding means
    • F24H9/0068—Guiding means in combustion gas channels
    • 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
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/06—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators
    • F24H3/065—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/0005—Details for water heaters
    • F24H9/001—Guiding means
    • F24H9/0026—Guiding means in combustion gas channels

Definitions

  • the invention relates to an arrangement for lowering the exhaust gas temperature in heating devices with a combustion chamber, a combustion air blower, an electrical ignition device and a flame tube and a heat exchanger concentrically spaced around it with indirect heating surfaces (fins) and a nozzle for removing the combustion gases.
  • Such heaters are known for use in mobile units such as motor vehicles, ships or caravans and are used there to heat the vehicle interior.
  • the known heaters are operated with liquid fuel, preferably the fuel that is also used for combustion in the vehicle's engine.
  • the interior can either be heated using warm air that is blown directly into the room or indirectly using heated water. With the so-called water heaters, it is also possible to preheat the engine circuit.
  • Such a heater is described in detail in DE-OS 2139504.
  • a heating device is described which is provided with a die-cast piece, which forms in one piece the combustion chamber together with the heat exchanger provided on both sides with indirect heating surfaces (fins) and the exhaust gas connection, with a flame tube connected to the combustion chamber, which is provided in the fins Extends heat exchanger room.
  • This device is designed for heating fresh air and is used to heat the vehicle interior.
  • this heater has disadvantages with regard to exhaust gas routing.
  • the combustion gas emerging from the flame tube and redirected at the heat exchanger wall flows as exhaust gas to the exhaust pipe in the shortest way, and only a small proportion also flows through the annular space between the flame pipe and heat exchanger along the fins in the area opposite the exhaust pipe. This results in an unevenness in the temperature distribution and, due to the relatively small flow path of the exhaust gas, leads to an unnecessarily high exhaust gas temperature at the exhaust gas outlet.
  • the invention has for its object to provide an arrangement in a generic heating device in which a more uniform temperature distribution in the heat exchanger and thereby a reduction in the exhaust gas temperature and an increase in the efficiency of the heat exchanger is achieved.
  • This object is achieved according to the present invention in a generic heating device in that a baffle is arranged in the annular space between the flame tube and the heat exchanger in the flow path of the exhaust gas in front of the exhaust pipe in the area in which the exhaust pipe is molded onto the heat exchanger Covering the area between 45 ° and 180 ° of the annulus.
  • a baffle is arranged in the annular space between the flame tube and the heat exchanger in the flow path of the exhaust gas in front of the exhaust pipe in the area in which the exhaust pipe is molded onto the heat exchanger Covering the area between 45 ° and 180 ° of the annulus.
  • the baffle is arranged on the heat exchanger.
  • the baffle has an angle with which it is inserted into the heat exchanger and firmly connected to it.
  • the guide plate in which the ribs of the heat exchanger are guided up to the guide plate, the guide plate can also be attached directly to the ribs of the heat exchanger.
  • the baffle is a simple sheet metal part.
  • Another expedient embodiment is characterized in that the guide plate has one or more gas passage openings.
  • the guide plate can also be attached to the flame tube.
  • the flame tube together with the baffle plate is placed on the combustion chamber when assembling the heater.
  • the heater shown as an example corresponds to that from DE-OS 2139504. This is a heater for heating the interior of a motor vehicle with warm air.
  • the fuel is supplied via the spark plug connector 8, in which the ignition device 9 is also used.
  • the processed, ignitable mixture is ignited in the lateral prechamber 10 and burns in the combustion chamber 11, which is followed by a flame tube 12.
  • This flame tube 12 projects into the heat exchanger 13, which has indirect heating surfaces (fins) 14 on its outside and indirect heating surfaces (fins) 15 on its inside.
  • the exhaust gas is discharged through the exhaust pipe 16.
  • the fresh air sucked in through the fresh air inlet connection 3 flows through the heating device 1 and is heated with the indirect heating surfaces 15 when flowing through the annular space between the housing 2 and the heat exchanger 13 and leaves the heating device 1 as heating air via the heating air outlet connection 4.
  • the heating of the fresh air is carried out by the hot ones Combustion gases emerging from the flame tube 12, which is open at the end, and deflected on the wall of the heat exchanger 13 and flowing through the annular space 17 between the flame tube 12 and the heat exchanger 13 with the inner indirect heating surfaces 14.
  • the combustion gas takes the shortest and most resistance-free path from the flame tube outlet to the exhaust pipe 16, thereby preventing both a uniform flow in the heat exchanger 13 and a longer dwell time for heat transfer to the fresh air.
  • a guide plate 18 is arranged in the flow path of the exhaust gas in front of the exhaust pipe 16 in the annular space 17 between the flame tube 12 and the heat exchanger 13.
  • This baffle 18 covers at least a portion of the lower half of the annulus, preferably half of the annulus 17, so that the exhaust gas is forced to flow through the entire annulus 17 and to a certain extent flow out of the annulus half above the exhaust port 16.
  • the baffle 17 can be fastened to the heat exchanger 13 via a fastening leg 18, the inner indirect heating surfaces (ribs) 14 of which are of course shortened in this area.
  • the guide plate 17 can also be fastened directly to the ribs 14 without a fastening leg 18. Installation is very simple since the guide plate 17 is only inserted into the heat exchanger 13 and then fastened.
  • the baffle 17 can also have exhaust gas passage openings 20 in order to enable a part of the exhaust gas to flow directly to the exhaust gas connector 16. In this way, an optimization of the exhaust gas temperature reduction can be achieved in a simple manner by extending the residence time of the exhaust gas for heat transfer.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Central Heating Systems (AREA)

Description

Die Erfindung betrifft eine Anordnung zur Absenkung der Abgastemperatur bei Heizeinrichtungen mit einer Brennkammer, einem Verbrennungsluftgebläse, einer elektrischen Zündeinrichtung sowie einem Flammrohr und einem dieses im Abstand konzentrisch umgebenden mit indirekten Heizflächen (Rippen) versehenen Wärmetauscher und einem Stutzen zur Abführung der Verbrennungsgase. Derartige Heizgeräte sind bekannt für die Verwendung in mobilen Einheiten wie Kraftfahrzeuge, Schiffe oder Wohnwagen und dienen dort zur Beheizung des Fahrzeuginnenraumes. Die bekannten Heizgeräte werden mit flüssigem Brennstoff betrieben, wobei vorzugsweise der Brennstoff Anwendung findet, der auch zur Verbrennung im fahrzeugeigenen Motor dient. Die Beheizung des Innenraumes kann entweder über Warmluft erfolgen, die unmittelbar in den Raum eingeblasen wird oder indirekt über aufgeheiztes Wasser. Bei den sogenannten Wasserheizgeräten ist es zudem noch möglich, den Motorkreislauf vorzuheizen.The invention relates to an arrangement for lowering the exhaust gas temperature in heating devices with a combustion chamber, a combustion air blower, an electrical ignition device and a flame tube and a heat exchanger concentrically spaced around it with indirect heating surfaces (fins) and a nozzle for removing the combustion gases. Such heaters are known for use in mobile units such as motor vehicles, ships or caravans and are used there to heat the vehicle interior. The known heaters are operated with liquid fuel, preferably the fuel that is also used for combustion in the vehicle's engine. The interior can either be heated using warm air that is blown directly into the room or indirectly using heated water. With the so-called water heaters, it is also possible to preheat the engine circuit.

Ein derartiges Heizgerät ist ausführlich in der DE-OS 2139504 beschrieben. In dieser Druckschrift wird eine Heizeinrichtung beschrieben, die mit einem Druckgußstück versehen ist, welches einstückig die Brennkammer mitsamt den beidseitig mit indirekten Heizflächen (Rippen) versehenen Wärmetauscher und den Abgasstutzen bildet, wobei an die Brennkammer ein Flammrohr angeschlossen ist, das in den mit Rippen versehenen Wärmetauscherraum hineinragt. Dieses Gerät ist für die Aufheizung von Frischluft ausgelegt und dient zur Beheizung des Fahrzeuginnenraumes.Such a heater is described in detail in DE-OS 2139504. In this document, a heating device is described which is provided with a die-cast piece, which forms in one piece the combustion chamber together with the heat exchanger provided on both sides with indirect heating surfaces (fins) and the exhaust gas connection, with a flame tube connected to the combustion chamber, which is provided in the fins Extends heat exchanger room. This device is designed for heating fresh air and is used to heat the vehicle interior.

Dieses Heizgerät weist jedoch bezüglich der Abgasführung Nachteile auf. Bei der dort geschützten Anordnung strömt das aus dem Flammrohr austretende und an der Wärmetauscherwand umgelenkte Verbrennungsgas als Abgas auf dem kürzesten Weg dem Abgasstutzen zu, und nur ein geringerer Anteil durchströmt auch den Ringraum zwischen Flammrohr und Wärmetauscher entlang den Rippen in dem dem Abgasstutzen gegenüberliegenden Bereich. Dadurch ergibt sich eine Ungleichmäßigkeit in der Temperaturverteilung und infolge des relativ geringen Strömungsweges des Abgases eine unnötig hohe Abgastemperatur am Abgasaustritt.However, this heater has disadvantages with regard to exhaust gas routing. In the arrangement protected there, the combustion gas emerging from the flame tube and redirected at the heat exchanger wall flows as exhaust gas to the exhaust pipe in the shortest way, and only a small proportion also flows through the annular space between the flame pipe and heat exchanger along the fins in the area opposite the exhaust pipe. This results in an unevenness in the temperature distribution and, due to the relatively small flow path of the exhaust gas, leads to an unnecessarily high exhaust gas temperature at the exhaust gas outlet.

Auf dem Gebiet der nicht unmittelbar vergleichbaren Heizkessel großer Leistung mit einer etwa senkrechten Brennkammer für einen Sturzbrenner ist es gemäß der DE-A-3546368 bekannt, die Verweilzeit des Rauchgases durch Stauung mittels einer nahe des Rauchgasauslaßstutzens in dem Bereich, in dem keine Nachheizung erfolgen soll, angeordneten kreisringförmigen Stauringes zu vergrößern. Bei dieser bekannten Anordnung ist der kreisringförmige Stauring an der äußeren Mantelwandung der Brennkammer befestigt und deckt nur einen Teilbereich des Ringraumes zwischen der mit Rippen versehenen Außenwandung und der Brennkammer ab, so daß das in großer Menge vorhandene Rauchgas nur zum Teil gestaut, zum anderen Teil aber permanent und direkt, auf kürzestem Weg abgezogen wird. Eine solche Stauwirkung mit gleichzeitigem direkten Abzug eines Teiles des Rauchgases ergibt jedoch nur dann eine gewisse Vergleichmäßigung der Temperaturverteilung, wenn die Stauung, wie dort offenbart, über den ganzen Umfang erfolgt.In the field of not directly comparable high-performance boilers with an approximately vertical combustion chamber for a lintel burner, it is known according to DE-A-3546368 that the dwell time of the flue gas by stowage by means of a near the flue gas outlet connection in the area in which no post-heating is to take place , to arrange arranged ring-shaped storage rings. In this known arrangement, the annular retaining ring is attached to the outer jacket wall of the combustion chamber and covers only a portion of the annular space between the ribbed outer wall and the combustion chamber, so that the flue gas present in large quantities is only partly stowed, but partly permanently and directly, by the shortest route. Such an accumulation effect with simultaneous direct extraction of part of the flue gas only results in a certain homogenization of the temperature distribution if the accumulation takes place over the entire circumference, as disclosed there.

Der Erfindung liegt die Aufgabe zugrunde, eine Anordnung bei einer gattungsgemäßen Heizeinrichtung aufzuzeigen, bei welcher eine gleichmäßigere Temperaturverteilung im Wärmetauscher und dadurch eine Absenkung der Abgastemperatur und eine Erhöhung des Wirkungsgrades des Wärmetauschers erreicht wird.The invention has for its object to provide an arrangement in a generic heating device in which a more uniform temperature distribution in the heat exchanger and thereby a reduction in the exhaust gas temperature and an increase in the efficiency of the heat exchanger is achieved.

Diese Aufgabe wird gemäß der vorliegenden Erfindung bei einer gattungsgemäßen Heizeinrichtung dadurch gelöst, daß im Strömungsweg des Abgases vor dem Abgasstutzen in dem Bereich, in dem der Abgasstutzen an den Wärmetauscher angeformt ist, in dem Ringraum zwischen Flammrohr und Wärmetauscher ein Leitblech angeordnet ist, das einen Bereich zwischen 45° und 180° des Ringraumes abdeckt. Hierdurch wird mit einfachen Mitteln erreicht, daß das Abgas nicht mehr auf dem kürzesten Weg dem Abgasstutzen zugeführt wird, sondern daß es gezwungen wird, den gesamten Ringraum zwischen Flammrohr und Wärmetauscher entlang der eingezogenen indirekten Heizflächen (Rippen) zu durchströmen. Das hat wiederum den Vorteil, daß eine gleichmäßigere Temperaturverteilung erreicht wird und infolge der längeren Verweilzeit des Abgases eine Absenkung der Abgastemperatur am Austrittsstutzen erreicht wird. Bezüglich der Größe des Leitbleches hat es sich als zweckmäßig erwiesen, daß dieses Leitblech einen Bereich zwischen 45° und 180° des Ringraumes abdeckt. Bevorzugt wird hierbei ein Bereich von 120° bis 180°. Es hat sich gezeigt, daß mit dieser Dimensionierung eine Optimierung der Verweilzeit des Abgases erreicht wird. Gemäß einer zweckmäßigen Weiterführung der Erfindung ist das Leitblech an den Wärmetauscher angeordnet. Hierzu weist das Leitblech einen Winkel auf, mit dem es in den Wärmetauscher eingeschoben und mit diesem fest verbunden wird. Bei einer zweckmäßigen Ausgestaltung, bei der die Rippen des Wärmetauschers bis an das Leitblech geführt sind, kann das Leitblech auch unmittelbar an den Rippen des Wärmetauschers befestigt werden. In diesem Fall ist das Leitblech ein einfaches Blechteil. Eine Weitere zweckmäßige Ausgestaltung ist dadurch gekennzeichnet, daß das Leitblech ein oder mehrere Gasdurchtrittsöffnungen aufweist.This object is achieved according to the present invention in a generic heating device in that a baffle is arranged in the annular space between the flame tube and the heat exchanger in the flow path of the exhaust gas in front of the exhaust pipe in the area in which the exhaust pipe is molded onto the heat exchanger Covering the area between 45 ° and 180 ° of the annulus. In this way it is achieved with simple means that the exhaust gas is no longer on the shortest Path is fed to the exhaust pipe, but that it is forced to flow through the entire annular space between the flame tube and heat exchanger along the retracted indirect heating surfaces (fins). This in turn has the advantage that a more uniform temperature distribution is achieved and, due to the longer residence time of the exhaust gas, the exhaust gas temperature is reduced at the outlet connection. With regard to the size of the guide plate, it has proven to be expedient for this guide plate to cover an area between 45 ° and 180 ° of the annular space. A range of 120 ° to 180 ° is preferred. It has been shown that this dimensioning optimizes the residence time of the exhaust gas. According to an expedient development of the invention, the baffle is arranged on the heat exchanger. For this purpose, the baffle has an angle with which it is inserted into the heat exchanger and firmly connected to it. In an expedient embodiment, in which the ribs of the heat exchanger are guided up to the guide plate, the guide plate can also be attached directly to the ribs of the heat exchanger. In this case, the baffle is a simple sheet metal part. Another expedient embodiment is characterized in that the guide plate has one or more gas passage openings.

Ein Ausführungsbeispiel der Erfindung ist vereinfacht und schematisch in den Figuren dargestellt. Dabei zeigt:

Fig. 1
einen Schnitt durch ein Heizgerät
Fig. 2
einen Schnitt an der angegebenen Stelle II-II.

An embodiment of the invention is simplified and shown schematically in the figures. It shows:
Fig. 1
a section through a heater
Fig. 2
a section at the specified point II-II.

Schließlich kann nach einer weiteren Ausgestaltung das Leitblech auch an dem Flammrohr befestigt sein. In diesem Fall wird beim Zusammenbau des Heizgerätes das Flammrohr samt Leitblech auf die Brennkammer aufgesetzt.Finally, according to a further embodiment, the guide plate can also be attached to the flame tube. In this case, the flame tube together with the baffle plate is placed on the combustion chamber when assembling the heater.

Das als Beispiel dargestellte Heizgerät entspricht dem aus der DE-OS 2139504. Dabei handelt es sich um ein Heizgerät für die Beheizung des Innenraumes eines Kraftfahrzeuges mit Warmluft.The heater shown as an example corresponds to that from DE-OS 2139504. This is a heater for heating the interior of a motor vehicle with warm air.

Bei der Heizeinrichtung 1 ist in einem metallischen Gehäuse 2, das einen axialen Frischlufteintrittsstutzen 3 und einen ebenfalls axialen Heizluftaustrittsstutzen 4 aufweist, ein Frischluftansauggebläse 5 und auf gleicher Welle ein Verbrennungsluftgebläse 6, das die Verbrennungsluft über den Verbrennungsluftansaugstutzen 7 ansaugt, angeordnet. Die Brennstoffzufuhr erfolgt über den Zündkerzenstutzen 8, in dem auch die Zündeinrichtung 9 eingesetzt ist. Das aufbereitete, zündfähige Gemisch wird in der seitlichen Vorkammer 10 gezündet und verbrennt in der Brenkkammer 11, an die sich ein Flammrohr 12 anschließt. Dieses Flammrohr 12 ragt in den Wärmetauscher 13, der an seiner Außenseite indirekte Heizflächen (Rippen) 14 und an seiner Innenseite indirekte Heizflächen (Rippen) 15 aufweist. Das Abgas wird über den Abgasstutzen 16 abgeführt. Die durch den Frischlufteintrittsstutzen 3 angesaugte Frischluft durchströmt die Heizeinrichtung 1 und wird beim Durchströmen des Ringraumes zwischen Gehäuse 2 und dem Wärmetauscher 13 mit den indirekten Heizflächen 15 aufgeheizt und verläßt als Heizluft die Heizeinrichtung 1 über den Heizluftaustrittsstutzen 4. Die Aufheizung der Frischluft erfolgt durch die heißen Verbrennungsgase, die aus dem Flammrohr 12, das stirnseitig offen ist, austreten und an der Wand des Wärmetauscher 13 umgelenkt werden und den Ringraum 17 zwischen Flammrohr 12 und Wärmetauscher 13 mit den inneren indirekten Heizflächen 14 durchströmt.In the heating device 1, a fresh air intake blower 5 and a combustion air blower 6, which draws the combustion air through the combustion air intake stub 7, is arranged in a metallic housing 2, which has an axial fresh air inlet connection 3 and an axial heating air outlet connection 4 as well. The fuel is supplied via the spark plug connector 8, in which the ignition device 9 is also used. The processed, ignitable mixture is ignited in the lateral prechamber 10 and burns in the combustion chamber 11, which is followed by a flame tube 12. This flame tube 12 projects into the heat exchanger 13, which has indirect heating surfaces (fins) 14 on its outside and indirect heating surfaces (fins) 15 on its inside. The exhaust gas is discharged through the exhaust pipe 16. The fresh air sucked in through the fresh air inlet connection 3 flows through the heating device 1 and is heated with the indirect heating surfaces 15 when flowing through the annular space between the housing 2 and the heat exchanger 13 and leaves the heating device 1 as heating air via the heating air outlet connection 4. The heating of the fresh air is carried out by the hot ones Combustion gases emerging from the flame tube 12, which is open at the end, and deflected on the wall of the heat exchanger 13 and flowing through the annular space 17 between the flame tube 12 and the heat exchanger 13 with the inner indirect heating surfaces 14.

Bei der bekannten Einrichtung nimmt das Verbrennungsgas den Kürzesten und widerstandslosesten Weg vom Flammrohraustritt zum Abgasstutzen 16, wodurch sowohl eine gleichmäßige Strömung im Wärmetauscher 13 verhindert wird als auch eine längere Verweilzeit zur Wärmeübertragung auf die Frischluft. Gemäß der vorliegenden Erfindung ist daher in dem Ringraum 17 zwischen Flammrohr 12 und Wärmetauscher 13 ein Leitblech 18 im Strömungsweg des Abgases vor dem Abgasstutzen 16 angeordnet.In the known device, the combustion gas takes the shortest and most resistance-free path from the flame tube outlet to the exhaust pipe 16, thereby preventing both a uniform flow in the heat exchanger 13 and a longer dwell time for heat transfer to the fresh air. According to the present invention, therefore, a guide plate 18 is arranged in the flow path of the exhaust gas in front of the exhaust pipe 16 in the annular space 17 between the flame tube 12 and the heat exchanger 13.

Dieses Leitblech 18 deckt mindestens einen Bereich der unteren Ringraumhälfte ab, vorzugsweise den halben Ringraum 17, so daß das Abgas gezwungen ist, den gesamten Ringraum 17 zu durchströmen und gewissermaßen von der Ringraumhälfte über dem Abgasstutzen 16 abzuströmen. Das Leitblech 17 kann über einen Befestigungsschenkel 18 an dem Wärmetauscher 13 befestigt sein, dessen innere indirekten Heizflächen (Rippen) 14 in diesem Bereich natürlich verkürzt sind. Das Leitblech 17 kann auch  ―  ohne Befestigungsschenkel 18  ―  direkt an den Rippen 14 befestigt sein. Die Montage ist sehr einfach, da das Leitblech 17 in den Wärmetauscher 13 nur eingeschoben und dann befestigt wird. Das Leitblech 17 kann auch Abgasdurchtrittsöffnungen 20 aufweisen, um einen Teil des Abgases eine direkte Zuströmung zum Abgasstutzen 16 zu ermöglichen. Hierdurch kann in einfacher Weise eine Optimierung der Abgastemperaturabsenkung durch Verlängerung der Verweilzeit des Abgases zur Wärmeübertragung erreicht werden.This baffle 18 covers at least a portion of the lower half of the annulus, preferably half of the annulus 17, so that the exhaust gas is forced to flow through the entire annulus 17 and to a certain extent flow out of the annulus half above the exhaust port 16. The baffle 17 can be fastened to the heat exchanger 13 via a fastening leg 18, the inner indirect heating surfaces (ribs) 14 of which are of course shortened in this area. The guide plate 17 can also be fastened directly to the ribs 14 without a fastening leg 18. Installation is very simple since the guide plate 17 is only inserted into the heat exchanger 13 and then fastened. The baffle 17 can also have exhaust gas passage openings 20 in order to enable a part of the exhaust gas to flow directly to the exhaust gas connector 16. In this way, an optimization of the exhaust gas temperature reduction can be achieved in a simple manner by extending the residence time of the exhaust gas for heat transfer.

Claims (5)

1. Arrangement for lowering the exhaust gas temperature in heating devices having a combustion chamber, a combustion air blower, an electric ignition device and a flame pipe and a heat exchanger, which is arranged spaced concentrically surrounding the flame pipe and is provided with indirect heating surfaces (ribs), and having a connection tube for drawing off the combustion gases, characterised in that there is arranged, in the flow path of the exhaust gas in front of the exhaust gas pipe (16), in the area in which the exhaust gas pipe (16) is integrally formed on the heat exchanger (13), in the annular space (17) between the flame pipe (12) and the heat exchanger (13), a guide plate (18) which covers an area between 45° and 180° of the annular space (17).
2. Arrangement according to Claim 1, characterised in that the guide plate (18) is arranged on the heat exchanger (13).
3. Arrangement according to Claim 1 or 2, characterised in that the guide plate (18) has gas through-flow openings (20).
4. Arrangement according to Claim 1, 2 or 3, characterised in that the indirect heating surfaces (14, 15) of the heat exchanger (13) are provided as far as to the guide plate (18).
5. Arrangement according to Claim 1 or 3, characterised in that the guide plate (18) is secured on the flame pipe (12).
EP89102983A 1988-03-11 1989-02-21 Arrangement for lowering of flue gas temperature of heating installations Expired - Lifetime EP0331969B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3808061A DE3808061A1 (en) 1988-03-11 1988-03-11 ARRANGEMENT FOR REDUCING EXHAUST GAS TEMPERATURE IN HEATING DEVICES
DE3808061 1988-03-11

Publications (3)

Publication Number Publication Date
EP0331969A2 EP0331969A2 (en) 1989-09-13
EP0331969A3 EP0331969A3 (en) 1990-10-24
EP0331969B1 true EP0331969B1 (en) 1991-10-23

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Application Number Title Priority Date Filing Date
EP89102983A Expired - Lifetime EP0331969B1 (en) 1988-03-11 1989-02-21 Arrangement for lowering of flue gas temperature of heating installations

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Country Link
EP (1) EP0331969B1 (en)
CA (1) CA1336260C (en)
DE (2) DE3808061A1 (en)
ES (1) ES2027049T3 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4116692A1 (en) * 1991-05-22 1992-11-26 Kreis Truma Geraetebau HEAT EXCHANGER INSERT FOR AIR HEATERS
DE4208611C2 (en) * 1992-03-18 1995-05-18 Ruhrgas Ag Atmospheric gas burner with a shaft-shaped housing that guides an air flow
DE4327139A1 (en) * 1993-08-12 1995-02-16 Eberspaecher J Process for reducing odor and pollutant emissions from heating devices for vehicles and arrangement for carrying out the process
DE19516688C1 (en) * 1995-05-06 1996-09-05 Webasto Thermosysteme Gmbh Heating unit for vehicles, with outlet deflection sheet
CA2916073C (en) 2014-12-22 2023-04-11 Mcs Italy S.P.A. Transportable air heater
CN108534135B (en) * 2018-06-08 2024-06-04 中山劲牛科技有限公司 Blocking head

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DE7147049U (en) * 1972-04-20 K Raunser Waermetechn Anlagen- Und Zentralheizungsbau Oil stove
DE2139504C3 (en) * 1971-08-06 1979-06-28 Fa. J. Eberspaecher, 7300 Esslingen Heater for mobile units
DE3546368A1 (en) * 1985-12-31 1987-07-02 Siegfried Dipl Ing Weishaupt Heating boiler

Also Published As

Publication number Publication date
CA1336260C (en) 1995-07-11
DE3808061A1 (en) 1989-09-21
ES2027049T3 (en) 1992-05-16
DE3808061C2 (en) 1990-07-19
EP0331969A3 (en) 1990-10-24
DE58900389D1 (en) 1991-11-28
EP0331969A2 (en) 1989-09-13

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