EP0496340A1 - Double walled combustion chamber - Google Patents

Double walled combustion chamber Download PDF

Info

Publication number
EP0496340A1
EP0496340A1 EP92100899A EP92100899A EP0496340A1 EP 0496340 A1 EP0496340 A1 EP 0496340A1 EP 92100899 A EP92100899 A EP 92100899A EP 92100899 A EP92100899 A EP 92100899A EP 0496340 A1 EP0496340 A1 EP 0496340A1
Authority
EP
European Patent Office
Prior art keywords
double jacket
combustion chamber
parts
wall
chamber according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP92100899A
Other languages
German (de)
French (fr)
Other versions
EP0496340B1 (en
Inventor
Donald Hellmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nv Vaillant Sa
VAILLANT B.V.
Vaillant Austria GmbH
Vaillant GmbH
Vaillant SARL
Vaillant Ltd
Original Assignee
Vaillant Austria GmbH
Nv Vaillant Sa
Joh Vaillant GmbH and Co
Vaillant GmbH
Vaillant SARL
Vaillant Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from AT0015991A external-priority patent/AT396026B/en
Application filed by Vaillant Austria GmbH, Nv Vaillant Sa, Joh Vaillant GmbH and Co, Vaillant GmbH, Vaillant SARL, Vaillant Ltd filed Critical Vaillant Austria GmbH
Publication of EP0496340A1 publication Critical patent/EP0496340A1/en
Application granted granted Critical
Publication of EP0496340B1 publication Critical patent/EP0496340B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/14—Arrangements for connecting different sections, e.g. in water heaters 
    • 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
    • F24H9/12—Arrangements for connecting heaters to circulation pipes
    • F24H9/13—Arrangements for connecting heaters to circulation pipes for water heaters
    • 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
    • F24H9/14—Arrangements for connecting different sections, e.g. in water heaters 
    • F24H9/146—Connecting elements of a heat exchanger

Definitions

  • the invention relates to a combustion chamber with a double jacket through which a medium to be heated can flow.
  • the aim of the invention is to avoid these disadvantages and to propose a combustion chamber of the type mentioned at the outset which is simple to produce.
  • the double jacket is made of two circumferentially closed drawn parts, each of which is provided with at least one flange-like continuous edge section, and the two parts of the double jacket are connected to one another by means of two circumferential weld seams, each of the two parts on one Flange section of the other part stands up and is connected to this.
  • the two parts of the double jacket can be easily manufactured by deep drawing and welded together. This results in only two seams extending over the circumference of the double jacket.
  • the two parts of the double jacket can be produced by pulling with little effort.
  • a combustion chamber according to the invention which is covered at its upper end by a distributor hood, it can be provided according to a further feature of the invention that the two parts of the double jacket are essentially S-shaped in cross-section, the flange sections closer to the distributor hood against that Interior of the combustion chamber are directed.
  • combustion chamber or the double jacket can be produced with overlap seams, the production of which is unproblematic and with which the required tightness can be produced without problems.
  • seams can easily be made with roll-shaped electrodes.
  • the distributor hood overlaps the outside of the double jacket, wherein between the outside of the double jacket and the A seal is arranged on the inside of the edge section of the distributor hood that overlaps the double jacket.
  • the seal reliably prevents condensate from settling on the distributor hood from flowing out on the outside of the double jacket, and likewise the escape of flue gases if, due to unfavorable conditions, a flow reversal occurs in the region of the distributor hood.
  • Combustion chambers with a double jacket have inlet and outlet connections penetrating the outer wall of the double jacket, a barrier being arranged in the double jacket between them.
  • the inlet and outlet connections open essentially perpendicular to the walls of the double jacket, the inner walls of which, apart from the end regions, are flat.
  • the formations of the inner wall are essentially spherical segment-shaped and preferably merge into the flat or cylindrical region of the inner wall via transition arches.
  • a combustion chamber according to the invention it can further be provided that in the area of the inlet connection the formation has an essentially conical pin that is flush with the axis of the inlet connection and rises against it, so that there is a circumferential groove in the formation, whereby preferably rounded transitions are provided.
  • the inflowing medium strikes the spigot of the formation directed against the inlet connection, flows along its lateral surface and becomes in the area of the groove deflected the indentation, this deflection, in particular with rounded transitions, resulting in only very small flow losses. This also results in only a very small flow resistance when the medium to be heated flows through the double jacket of the combustion chamber.
  • FIG. 1 shows a section of a double jacket 1 according to the invention. This consists of two parts S and 3 which are essentially S-shaped in cross section and which are produced by drawing and are closed in the circumferential direction.
  • the individual parts 2 and 3 have the outer wall or sections 4 and 5 forming the inner wall, the edge sections 6, 7 and 8, 9 of which are flange-shaped, although the width of the edge sections is not the same.
  • the two parts 2 and 3 stand on the edge sections 9 and 6 of the other part.
  • the two parts 2, 3 are connected by means of two weld seams 10, 11.
  • the double jacket 1 through which the medium to be heated can flow, encloses a combustion chamber 12 which, in the embodiment according to FIG. 2, has an essentially rectangular cross section.
  • the seam 10 is designed as an overlap seam and can be produced in a very simple manner, for example by means of roll-shaped electrodes.
  • the two parts 2 and 3 can also be connected to one another with a corner seam 10 ′, as shown in FIG. 3.
  • FIG. 4 shows a combustion chamber 12 covered with a distributor hood 13.
  • the angled edge regions 14 of the distributor hood 13 overlap the outer side wall of the double jacket 1, a seal 15 being inserted between the inside of the edge regions 14 of the distributor hood 13 and the outside of the double jacket 1 which, on the one hand, reliably prevents condensate from depositing on the distributor hood from flowing along the outside of the double jacket 2, but also prevents smoke gases from escaping in the event of a flow reversal in the region of the distributor hood 13.
  • FIG. 5 shows a modification to the embodiment according to FIG. 4, in which a lip seal 15 'is provided instead of a seal 14 which is round in cross section.
  • FIG. 6 shows a conventional combustion chamber 12 'with a double jacket 1 through which a medium can flow.
  • connecting pieces 23 open substantially vertically into the double casing 1, the cross section of the double casing 1 in the area of the connecting piece 23 remaining the same as in the other areas of the double casing.
  • a lock 24 is installed in the double jacket 1 in the usual way, which blocks the direct path of the medium from the inlet connector 25 to the outlet connector 26 prevents. Formations 27 and 28 of the inner wall 31 of the double jacket 1 are provided in the region of the inlet and outlet connections 25, 26 and project against the interior of the combustion chamber 12.
  • the two formations 27, 28 are substantially spherical segment-shaped. However, an essentially conical spigot 20 is stamped into the formation 27 in the area of the inlet connector 25, which is arranged coaxially with the inlet connector 25 and projects against it. Rounded transitions are always provided in the formations 27, 28.
  • the inflowing medium therefore strikes the pin 20 and flows along its outer surface in the direction of the circumferential groove 21 of the formation 27. In the area of this groove 21 the flow is deflected, this deflection taking place at an angle which is considerably smaller than Is 180 °. This ensures an even distribution of the inflowing medium.
  • the two shapes result in an enlargement of the cross section of the double jacket in the inflow and outflow area, which results in a considerable reduction in flow resistance.
  • the formation of vortices is reduced by the configuration of the formations 27, 28, which results in a further reduction in the flow resistances.

Landscapes

  • 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)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Hydrogen, Water And Hydrids (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)

Abstract

Combustion chamber with a double wall through which a medium to be heated can flow. In order to be able easily to produce such a combustion chamber or a double wall for the same, it is provided that the double wall is produced from two drawn portions (2,3) which are closed in the peripheral direction; each of them is provided with at least one continuous edge section (6,7,8,9) like a flange, and the two portions (2,3) of the double wall (1) are connected together by two weld seams (10,11) running around them, each of the two portions (2,3) resting on a flange section (6,9) of what is respectively the other portion and connected to it. <IMAGE>

Description

Die Erfindung bezieht sich auf eine Brennkammer mit von einem zu erwärmenden Medium durchströmbaren Doppelmantel.The invention relates to a combustion chamber with a double jacket through which a medium to be heated can flow.

Die Herstellung solcher bekannter Doppelmäntel für Brennkammern erfolgte bei den bekannten Lösungen in der Weise, daß entsprechend zugeschnittene ebene Bleche, die gegebenenfalls aufgebördelt wurden, miteinander verschweißt oder verlötet wurden. Dies ist jedoch mit einem sehr erheblichen Aufwand verbunden. Außerdem ergeben sich dabei zumeist Ecknähte, die relativ schwierig herzustellen sind.In the known solutions, such known double jackets for combustion chambers were produced in such a way that correspondingly cut flat sheets, which were optionally flared, were welded or soldered together. However, this is associated with a very considerable effort. In addition, there are mostly corner seams that are relatively difficult to manufacture.

Ziel der Erfindung ist es, diese Nachteile zu vermeiden und eine Brennkammer der eingangs erwähnten Art vorzuschlagen, die sich einfach herstellen läßt.The aim of the invention is to avoid these disadvantages and to propose a combustion chamber of the type mentioned at the outset which is simple to produce.

Erfindungsgemäß wird dies dadurch erreicht, daß der Doppelmantel aus zwei in Umfangsrichtung geschlossenen Ziehteilen hergestellt ist, von denen jeder mit mindestens einem flanschartig ausgebildeten durchgehenden Randabschnitt versehen ist, und die beiden Teile des Doppelmantels mittels zweier umlaufender Schweißnähte miteinander verbunden sind, wobei jeder der beiden Teile auf einem Flanschabschnitt des anderen Teiles aufsteht und mit diesem verbunden ist.According to the invention this is achieved in that the double jacket is made of two circumferentially closed drawn parts, each of which is provided with at least one flange-like continuous edge section, and the two parts of the double jacket are connected to one another by means of two circumferential weld seams, each of the two parts on one Flange section of the other part stands up and is connected to this.

Dabei lassen sich die beiden Teile des Doppelmantels leicht durch Tiefziehen herstellen und miteinander verschweißen. Dabei ergeben sich lediglich zwei sich über den Umfang des Doppelmantels erstreckende Nähte.The two parts of the double jacket can be easily manufactured by deep drawing and welded together. This results in only two seams extending over the circumference of the double jacket.

Da die flanschartig ausgebildeten Randabschnitte nur eine relativ geringe Breite aufweisen brauchen, lassen sich die beiden Teile des Doppelmantels mit geringem Aufwand durch Ziehen herstellen.Since the flange-like edge sections need only have a relatively small width, the two parts of the double jacket can be produced by pulling with little effort.

Bei einer erfindungsgemäßen Brennkammer, die an ihrem oberen Ende durch eine Verteilerhaube abgedeckt ist, kann nach einem weiteren Merkmal der Erfindung vorgesehen sein, daß die beiden Teile des Doppelmantels im Querschnitt im wesentlichen S-förmig ausgebildet sind, wobei die der Verteilerhaube näheren Flanschabschnitte gegen das Innere der Brennkammer gerichtet sind.In a combustion chamber according to the invention, which is covered at its upper end by a distributor hood, it can be provided according to a further feature of the invention that the two parts of the double jacket are essentially S-shaped in cross-section, the flange sections closer to the distributor hood against that Interior of the combustion chamber are directed.

Dabei ergibt sich der Vorteil, daß sich die Brennkammer beziehungsweise der Doppelmantel mit Überlappungsnähten herstellen läßt, deren Herstellung unproblematisch ist und mit denen sich problemlos die erforderliche Dichtheit herstellen läßt. Dabei können solche Nähte leicht mit rollenförmigen Elektroden hergestellt werden.This has the advantage that the combustion chamber or the double jacket can be produced with overlap seams, the production of which is unproblematic and with which the required tightness can be produced without problems. Such seams can easily be made with roll-shaped electrodes.

Nach einem weiteren Merkmal der Erfindung kann vorgesehen sein, daß die Verteilerhaube die Außenseite des Doppelmantels übergreift, wobei zwischen der Außenseite des Doppelmantels und der Innenseite des den Doppelmantel übergreifenden Randabschnittes der Verteilerhaube eine Dichtung angeordnet ist.According to a further feature of the invention it can be provided that the distributor hood overlaps the outside of the double jacket, wherein between the outside of the double jacket and the A seal is arranged on the inside of the edge section of the distributor hood that overlaps the double jacket.

Durch die Dichtung wird ein Abfließen eines sich an der Verteilerhaube niederschlagenden Kondensats an der Außenseite des Doppelmantels sicher verhindert, desgleichen ein Austritt von Rauchgasen, falls es aufgrund ungünstiger Verhältnisse zu einer Strömungsumkehr im Bereich der Verteilerhaube kommt.The seal reliably prevents condensate from settling on the distributor hood from flowing out on the outside of the double jacket, and likewise the escape of flue gases if, due to unfavorable conditions, a flow reversal occurs in the region of the distributor hood.

Brennkammern mit einem Doppelmantel weisen die Außenwand des Doppelmantels durchsetzende Einlauf- und Auslaufstutzen auf, wobei zwischen diesen eine Sperre im Doppelmantel angeordnet ist.Combustion chambers with a double jacket have inlet and outlet connections penetrating the outer wall of the double jacket, a barrier being arranged in the double jacket between them.

Bei herkömmlichen Brennkammern mit einem Doppelmantel münden die Einlauf- und Auslaufstutzen im wesentlichen senkrecht zu den Wänden des Doppelmantels, dessen Innenwände, abgesehen von den Endbereichen, eben ausgebildet sind.In conventional combustion chambers with a double jacket, the inlet and outlet connections open essentially perpendicular to the walls of the double jacket, the inner walls of which, apart from the end regions, are flat.

Dadurch ergibt sich jedoch der Nachteil relativ hoher Strömungsverluste im Bereich des Einlauf- und Auslaufstutzens, die durch die im wesentlichen rechtwinklige Umlenkung der Strömung bedingt ist. Da die gesamten Strömungsverluste des den Doppelmantel durchströmenden zu erwärmenden Mediums zum überwiegenden Teil durch die Aus- und Einströmverluste bedingt sind, ergeben sich bei den herkömmlichen Brennkammern entsprechend hohe Strömungswiderstände.However, this results in the disadvantage of relatively high flow losses in the area of the inlet and outlet nozzle, which is due to the essentially right-angled deflection of the flow. Since the total flow losses of the medium to be heated flowing through the double jacket are largely due to the outflow and inflow losses, correspondingly high flow resistances result in the conventional combustion chambers.

Um diese Nachteile zu vermeiden, ist nach einem weiteren Merkmal der Erfindung vorgesehen, daß die Innenwand des Doppelmantels im Bereich des Einlauf- und des Auslaufstutzens je eine gegen das Innere der Brennkammer vorspringende Ausformung aufweist.To avoid these disadvantages, it is provided according to a further feature of the invention that the inner wall of the double jacket in Area of the inlet and the outlet nozzle each has a protrusion against the interior of the combustion chamber.

Durch diese Maßnahmen ergibt sich im Ein- und Ausströmbereich des Doppelmantels ein größerer Querschnitt, wodurch sich eine Verminderung des Strömungswiderstandes ergibt.These measures result in a larger cross section in the inflow and outflow area of the double jacket, which results in a reduction in the flow resistance.

Nach einem weiteren Merkmal der Erfindung kann vorgesehen sein, daß die Ausformungen der Innenwand im wesentlichen kugelsegmentförmig ausgebildet sind und vorzugsweise über Übergangsbögen in den ebenen oder zylinderförmigen Bereich der Innenwand übergehen.According to a further feature of the invention it can be provided that the formations of the inner wall are essentially spherical segment-shaped and preferably merge into the flat or cylindrical region of the inner wall via transition arches.

Durch diese Maßnahmen ergibt sich eine günstige Beeinflussung der Strömung des Mediums im Ein- und Ausströmbereich des Doppelmantels, wodurch die Einström- und Ausströmwiderstände weiter absinken.These measures have a favorable influence on the flow of the medium in the inflow and outflow area of the double jacket, as a result of which the inflow and outflow resistances decrease further.

Bei einer besonders bevorzugten Ausführungsform einer erfindungsgemäßen Brennkammer kann weiter vorgesehen sein, daß im Bereich des Einlaufstutzens die Ausformung einen mit der Achse des Einlaufstutzens fluchtenden, gegen diesen aufsteigenden, im wesentlichen kegelförmigen Zapfen aufweist, so daß sich in der Ausformung eine umlaufende Rille ergibt, wobei vorzugsweise gerundete Übergänge vorgesehen sind.In a particularly preferred embodiment of a combustion chamber according to the invention it can further be provided that in the area of the inlet connection the formation has an essentially conical pin that is flush with the axis of the inlet connection and rises against it, so that there is a circumferential groove in the formation, whereby preferably rounded transitions are provided.

Das einströmende Medium trifft bei dieser Ausgestaltung auf den gegen den Einlaufstutzen gerichteten Zapfen der Ausformung auf, strömt entlang dessen Mantelfläche und wird im Bereich der Rille der Einbuchtung umgelenkt, wobei sich durch diese Umlenkung, insbesondere bei gerundeten Übergängen, nur sehr kleine Strömungsverluste ergeben. Dadurch ergibt sich auch nur ein sehr kleiner Strömungswiderstand bei der Durchströmung des Doppelmantels der Brennkammer durch das zu erwärmende Medium.In this embodiment, the inflowing medium strikes the spigot of the formation directed against the inlet connection, flows along its lateral surface and becomes in the area of the groove deflected the indentation, this deflection, in particular with rounded transitions, resulting in only very small flow losses. This also results in only a very small flow resistance when the medium to be heated flows through the double jacket of the combustion chamber.

Die Erfindung wird nun anhand der Zeichnung näher erläutert.The invention will now be explained in more detail with reference to the drawing.

Dabei zeigen:

  • Figur 1 schematisch einen Ausschnitt aus einem erfindungsgemäßen Doppelmantel,
  • Figur 2 eine Draufsicht auf einen Doppelmantel nach der Figur 1,
  • Figur 3 ein Detail einer weiteren Ausführungsform,
  • Figur 4 schematisch einen Ausschnitt aus einer erfindungsgemäßen Brennkammer,
  • Figur 5 ein Detail einer gegenüber der Figur 4 abgewandelten Ausführungsform,
  • Figur 6 einen Ausschnitt einer bekannten Brennkammer im Bereich einer Einmündung und
  • Figur 7 einen Schnitt durch eine erfindungsgemäße Brennkammer im Bereich einer Einmündung.
Show:
  • FIG. 1 schematically shows a section of a double jacket according to the invention,
  • FIG. 2 shows a plan view of a double jacket according to FIG. 1,
  • FIG. 3 shows a detail of a further embodiment,
  • FIG. 4 schematically shows a section of a combustion chamber according to the invention,
  • FIG. 5 shows a detail of an embodiment modified compared to FIG. 4,
  • Figure 6 shows a detail of a known combustion chamber in the region of a junction and
  • 7 shows a section through a combustion chamber according to the invention in the region of a junction.

Figur 1 zeigt einen Ausschnitt aus einem erfindungsgemäßen Doppelmantel 1. Dieser besteht aus zwei im Querschnitt im wesentlichen S-förmigen Teilen 2 und 3, die durch Ziehen hergestellt und in Umfangsrichtung geschlossen sind.FIG. 1 shows a section of a double jacket 1 according to the invention. This consists of two parts S and 3 which are essentially S-shaped in cross section and which are produced by drawing and are closed in the circumferential direction.

Die einzelnen Teile 2 und 3 weisen die Außenwand beziehungsweise die Innenwand bildende Abschnitte 4 beziehungsweise 5 auf, deren Randabschnitte 6, 7 beziehungsweise 8, 9 flanschartig ausgebildet sind, wenngleich die Breite der Randabschnitte ungleich ist.The individual parts 2 and 3 have the outer wall or sections 4 and 5 forming the inner wall, the edge sections 6, 7 and 8, 9 of which are flange-shaped, although the width of the edge sections is not the same.

Die beiden Teile 2 und 3 stehen auf den Randabschnitten 9 und 6 des jeweils anderen Teiles auf.The two parts 2 and 3 stand on the edge sections 9 and 6 of the other part.

Die Verbindung der beiden Teile 2, 3 erfolgt mittels zweier Schweißnähte 10, 11.The two parts 2, 3 are connected by means of two weld seams 10, 11.

Der Doppelmantel 1, der von dem zu erwärmenden Medium durchströmbar ist, umschließt eine Brennkammer 12, die bei der Ausführungsform nach der Figur 2 einen im wesentlichen rechteckigen Querschnitt aufweist.The double jacket 1, through which the medium to be heated can flow, encloses a combustion chamber 12 which, in the embodiment according to FIG. 2, has an essentially rectangular cross section.

Bei der Ausführungsform nach der Figur 1 ist die Naht 10 als Überlappungsnaht ausgebildet und kann zum Beispiel mittels rollenförmiger Elektroden auf sehr einfache Weise hergestellt werden.In the embodiment according to FIG. 1, the seam 10 is designed as an overlap seam and can be produced in a very simple manner, for example by means of roll-shaped electrodes.

Statt mit einer Überlappungsnaht, wie dies bei der Ausführungsform nach der Figur 1 der Fall ist, können die beiden Teile 2 und 3 auch mit einer Ecknaht 10' miteinander verbunden werden, wie dies in der Figur 3 dargestellt ist.Instead of using an overlap seam, as is the case with the embodiment according to FIG. 1, the two parts 2 and 3 can also be connected to one another with a corner seam 10 ′, as shown in FIG. 3.

Die Figur 4 zeigt eine mit einer Verteilerhaube 13 abgedeckte Brennkammer 12. Dabei übergreift die Verteilerhaube 13 mit ihren abgewinkelten Randbereichen 14 die äußere Seitenwand des Doppelmantels 1, wobei zwischen der Innenseite der Randbereiche 14 der Verteilerhaube 13 und der Außenseite des Doppelmantels 1 eine Dichtung 15 eingelegt ist, durch die einerseits ein Abfließen von sich an der Verteilerhaube niederschlagenden Kondensats entlang der Außenseite des Doppelmantels 2, aber auch ein Austreten von Rauchgasen im Falle einer Strömungsumkehr im Bereich der Verteilerhaube 13 sicher verhindert wird.FIG. 4 shows a combustion chamber 12 covered with a distributor hood 13. The angled edge regions 14 of the distributor hood 13 overlap the outer side wall of the double jacket 1, a seal 15 being inserted between the inside of the edge regions 14 of the distributor hood 13 and the outside of the double jacket 1 which, on the one hand, reliably prevents condensate from depositing on the distributor hood from flowing along the outside of the double jacket 2, but also prevents smoke gases from escaping in the event of a flow reversal in the region of the distributor hood 13.

Die Figur 5 zeigt eine Abwandlung gegenüber der Ausführungsform nach der Figur 4, bei der statt einer im Querschnitt runden Dichtung 14 eine Lippendichtung 15' vorgesehen ist.FIG. 5 shows a modification to the embodiment according to FIG. 4, in which a lip seal 15 'is provided instead of a seal 14 which is round in cross section.

Figur 6 zeigt eine herkömmliche Brennkammer 12' mit einem Doppelmantel 1, der von einem Medium durchströmbar ist. Dabei münden Stutzen 23 im wesentlichen senkrecht in den Doppelmantel 1 ein, wobei der Querschnitt des Doppelmantels 1 im Bereich des Stutzens 23 gleich wie in den übrigen Bereichen des Doppelmantels bleibt.FIG. 6 shows a conventional combustion chamber 12 'with a double jacket 1 through which a medium can flow. In this case, connecting pieces 23 open substantially vertically into the double casing 1, the cross section of the double casing 1 in the area of the connecting piece 23 remaining the same as in the other areas of the double casing.

Dadurch kommt es aber zu einer plötzlichen Umlenkung der Strömung des Mediums um 90°, wodurch sich relativ starke Verwirbelungen des Mediums und damit hohe Strömungsverluste ergeben.However, this leads to a sudden deflection of the flow of the medium by 90 °, which results in relatively strong turbulences in the medium and thus high flow losses.

Bei der erfindungsgemäßen Brennkammer 12 nach der Figur 7 ist in dem Doppelmantel 1 in üblicher Weise eine Sperre 24 eingebaut, der den direkten Weg des Mediums vom Einlaufstutzen 25 zum Auslaufstutzen 26 unterbindet. Dabei sind im Bereich des Einlauf- und des Auslaufstutzens 25, 26 Ausformungen 27 und 28 der Innenwand 31 des Doppelmantels 1 vorgesehen, die gegen das Innere der Brennkammer 12 vorspringen.In the combustion chamber 12 according to the invention according to FIG. 7, a lock 24 is installed in the double jacket 1 in the usual way, which blocks the direct path of the medium from the inlet connector 25 to the outlet connector 26 prevents. Formations 27 and 28 of the inner wall 31 of the double jacket 1 are provided in the region of the inlet and outlet connections 25, 26 and project against the interior of the combustion chamber 12.

Die beiden Ausformungen 27, 28 sind im wesentlichen kugelsegmentförmig ausgebildet. Allerdings ist in der Ausformung 27 im Bereich des Einlaufstutzens 25 ein im wesentlichen kegelförmiger Zapfen 20 eingeprägt, der koaxial zum Einlaufstutzen 25 angeordnet ist und gegen diesen vorspringt. Dabei sind bei den Ausformungen 27, 28 stets gerundete Übergänge vorgesehen.The two formations 27, 28 are substantially spherical segment-shaped. However, an essentially conical spigot 20 is stamped into the formation 27 in the area of the inlet connector 25, which is arranged coaxially with the inlet connector 25 and projects against it. Rounded transitions are always provided in the formations 27, 28.

Das einströmende Medium trifft daher auf den Zapfen 20 auf und strömt entlang dessen Mantelfläche in Richtung zur in Umfangsrichtung umlaufenden Rille 21 der Ausformung 27. Im Bereich dieser Rille 21 erfolgt die Umlenkung der Strömung, wobei diese Umlenkung um einen Winkel erfolgt, der erheblich kleiner als 180° ist. Dadurch erfolgt eine gleichmäßige Verteilung des zuströmenden Mediums.The inflowing medium therefore strikes the pin 20 and flows along its outer surface in the direction of the circumferential groove 21 of the formation 27. In the area of this groove 21 the flow is deflected, this deflection taking place at an angle which is considerably smaller than Is 180 °. This ensures an even distribution of the inflowing medium.

Die Ausformung 28 ist dagegen lediglich kugelsegmentförmig ausgebildet. Durch die beiden Ausformungen ergibt sich eine Vergrößerung des Querschnittes des Doppelmantels im Ein- beziehungsweise Ausströmbereich, wodurch sich eine erhebliche Reduzierung der Strömungswiderstände ergibt. Außerdem wird durch die Ausgestaltung der Ausformungen 27, 28 die Bildung von Wirbeln reduziert, wodurch sich eine weitere Verminderung der Strömungswiderstände ergibt.The formation 28, on the other hand, is only spherical segment-shaped. The two shapes result in an enlargement of the cross section of the double jacket in the inflow and outflow area, which results in a considerable reduction in flow resistance. In addition, the formation of vortices is reduced by the configuration of the formations 27, 28, which results in a further reduction in the flow resistances.

Claims (6)

Brennkammer mit von einem zu erwarmenden Medium durchströmbaren Doppelmantel, dadurch gekennzeichnet, daß der Doppelmantel aus zwei in Umfangsrichtung geschlossenen Ziehteilen (2, 3) hergestellt ist, von denen jeder mit mindestens einem flanschartig ausgebildeten durchgehenden Randabschnitt (6, 7, 8, 9) versehen ist, und die beiden Teile (2, 3) des Doppelmantels (1) mittels zweier umlaufender Schweißnähte (10, 11) miteinander verbunden sind, wobei jeder der beiden Teile (2, 3) auf einem Flanschabschnitt (6, 9) des jeweils anderen Teiles aufsteht und mit diesem verbunden ist.Combustion chamber with a double jacket through which a medium to be heated can flow, characterized in that the double jacket is made from two drawn parts (2, 3) closed in the circumferential direction, each of which is provided with at least one flange-like continuous edge section (6, 7, 8, 9) and the two parts (2, 3) of the double jacket (1) are connected to one another by means of two circumferential weld seams (10, 11), each of the two parts (2, 3) on a flange section (6, 9) of the other Part stands up and is connected to it. Brennkammer nach Anspruch 1, die an ihrem oberen Ende durch eine Verteilerhaube abgedeckt ist, dadurch gekennzeichnet, daß die beiden Teile (2, 3) des Doppelmantels (1) im Querschnitt im wesentlichen S-förmig ausgebildet sind, wobei die der Verteilerhaube (13) näheren Flanschabschnitte (6, 8) gegen das Innere der Brennkammer (12) gerichtet sind.Combustion chamber according to Claim 1, which is covered at its upper end by a distributor hood, characterized in that the two parts (2, 3) of the double jacket (1) are essentially S-shaped in cross section, the distributor hood (13) closer flange sections (6, 8) are directed against the interior of the combustion chamber (12). Brennkammer nach Anspruch 2, dadurch gekennzeichnet, daß die Verteilerhaube (13) die Außenseite des Doppelmantels (1) übergreift, wobei zwischen der Außenseite des Doppelmantels (1) und der Innenseite des den Doppelmantel (1) übergreifenden Randabschnittes (14) der Verteilerhaube (13) eine Dichtung (15, 15') angeordnet ist.Combustion chamber according to claim 2, characterized in that the distributor hood (13) engages over the outside of the double jacket (1), between the outside of the double jacket (1) and the inside of the edge section (14) of the distributor hood (13) which overlaps the double jacket (1) ) a seal (15, 15 ') is arranged. Brennkammer nach einem der Ansprüche 1 bis 3, mit die Außenwand des Doppelmantels durchsetzenden Einlauf- und Auslaufstutzen, zwischen denen eine Sperre im Doppelmantel angeordnet ist, dadurch gekennzeichnet, daß die Innenwand (31) des Doppelmantels (1) im Bereich des Einlauf- und des Auslaufstutzens (25, 26) je eine gegen das Innere der Brennkammer (12) vorspringende Ausformung (27, 28) aufweist.Combustion chamber according to one of claims 1 to 3, with the inlet and outlet connections penetrating the outer wall of the double jacket, between which a lock is arranged in the double jacket, characterized in that the inner wall (31) of the double jacket (1) in the region of the inlet and the Outlet nozzle (25, 26) each has a protrusion (27, 28) projecting towards the interior of the combustion chamber (12). Brennkammer nach Anspruch 4, dadurch gekennzeichnet, daß die Ausformungen (27, 28) der Innenwand (31) im wesentlichen kugelsegmentförmig ausgebildet sind und vorzugsweise über Übergangsbögen in den ebenen oder zylinderförmigen Bereich der Innenwand (31) übergehen.Combustion chamber according to claim 4, characterized in that the formations (27, 28) of the inner wall (31) are substantially spherical and preferably pass over transition arches into the flat or cylindrical region of the inner wall (31). Brennkammer nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß im Bereich des Einlaufstutzens (25) die Ausformung (27) einen mit der Achse des Einlaufstutzens (25) fluchtenden, gegen diesen aufsteigenden im wesentlichen kegelförmigen Zapfen (20) aufweist, so daß sich in der Ausformung (27) eine umlaufende Rille (21) ergibt, wobei vorzugsweise gerundete Übergänge vorgesehen sind.Combustion chamber according to Claim 4 or 5, characterized in that in the region of the inlet connection (25) the formation (27) has an essentially conical pin (20) which is aligned with the axis of the inlet connection (25) and rises against it, so that in the formation (27) results in a circumferential groove (21), preferably with rounded transitions.
EP92100899A 1991-01-25 1992-01-21 Double walled combustion chamber Expired - Lifetime EP0496340B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AT0015991A AT396026B (en) 1991-01-25 1991-01-25 Combustion chamber
AT159/91 1991-01-25
DE9102133 1991-02-21
DE9102133U 1991-02-21

Publications (2)

Publication Number Publication Date
EP0496340A1 true EP0496340A1 (en) 1992-07-29
EP0496340B1 EP0496340B1 (en) 1995-05-17

Family

ID=25591682

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92100899A Expired - Lifetime EP0496340B1 (en) 1991-01-25 1992-01-21 Double walled combustion chamber

Country Status (3)

Country Link
EP (1) EP0496340B1 (en)
AT (1) ATE122777T1 (en)
DE (2) DE59202178D1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0816777B1 (en) * 1996-07-01 2002-12-18 Robert Bosch Gmbh Method for making a combustion chamber, esp. for gas fired water heaters, and combustion chamber obtained by such method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1724505A (en) * 1924-03-19 1929-08-13 Murray Boiler or heater
US3133527A (en) * 1957-12-16 1964-05-19 Heat King Corp Booster heater

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1724505A (en) * 1924-03-19 1929-08-13 Murray Boiler or heater
US3133527A (en) * 1957-12-16 1964-05-19 Heat King Corp Booster heater

Also Published As

Publication number Publication date
ATE122777T1 (en) 1995-06-15
DE59202178D1 (en) 1995-06-22
EP0496340B1 (en) 1995-05-17
DE9200780U1 (en) 1992-03-19

Similar Documents

Publication Publication Date Title
DE2607563C2 (en) Drip irrigation hose
DE69115437T2 (en) Improved fluid control unit
DE3503602C1 (en) Assembly-assisting ring for shaft sealing rings
EP0496340A1 (en) Double walled combustion chamber
DD149259A1 (en) HEATING BOILERS FOR LIQUID OR GASOFUL FUELS
DE3606676C2 (en)
AT396026B (en) Combustion chamber
DE3934399C2 (en) Trunk lid for a vehicle
DE4014346C2 (en) Centerpiece tip adjustable relative to wing rails
DE2016708C3 (en) Body profile, in particular for the body of motor vehicles
DE19700462C2 (en) Static mixer
EP0040257B1 (en) Drainage pipe with triangular cross section
DE10011504B4 (en) Mounting arrangement for a shower head
EP0607166B1 (en) Device for sucking additives into a fluid stream
DE3112403A1 (en) Vacuum cleaner nozzle
DE2113000A1 (en) Vent pipe for canister outlet pipes
AT408571B (en) FRESH AIR JUNCTION
DE29808031U1 (en) Panel or flat radiators
DE10022748A1 (en) radiator
DE1596328A1 (en) Gas cleaning device
DE4435208C2 (en) Connection part for solar panels
AT399037B (en) Flow safeguard
DE2439645C3 (en) Gate valve
DE9113349U1 (en) Cooled heating shaft
DE1909210A1 (en) Valve for ventilation systems

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL PT SE

17P Request for examination filed

Effective date: 19921020

17Q First examination report despatched

Effective date: 19930730

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: VAILLANT GES.M.B.H

Owner name: VAILLANT S.A.R.L

Owner name: N.V. VAILLANT S.A.

Owner name: JOH. VAILLANT GMBH U. CO.

Owner name: VAILLANT B.V.

Owner name: VAILLANT LTD.

Owner name: VAILLANT GMBH

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL PT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19950517

Ref country code: GB

Effective date: 19950517

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19950517

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19950517

Ref country code: FR

Effective date: 19950517

Ref country code: DK

Effective date: 19950517

Ref country code: BE

Effective date: 19950517

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19950517

REF Corresponds to:

Ref document number: 122777

Country of ref document: AT

Date of ref document: 19950615

Kind code of ref document: T

REF Corresponds to:

Ref document number: 59202178

Country of ref document: DE

Date of ref document: 19950622

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19950817

Ref country code: PT

Effective date: 19950817

EN Fr: translation not filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 19950517

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19960131

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19961220

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19970110

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19970318

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980121

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980131

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980131

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19981001