EP0632239A1 - Hot gas passage - Google Patents

Hot gas passage Download PDF

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Publication number
EP0632239A1
EP0632239A1 EP94110188A EP94110188A EP0632239A1 EP 0632239 A1 EP0632239 A1 EP 0632239A1 EP 94110188 A EP94110188 A EP 94110188A EP 94110188 A EP94110188 A EP 94110188A EP 0632239 A1 EP0632239 A1 EP 0632239A1
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EP
European Patent Office
Prior art keywords
pocket
inner shell
hot gas
wall
gas flue
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
EP94110188A
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German (de)
French (fr)
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EP0632239B1 (en
Inventor
Heribert Schmitz
Helmut Burger
Dieter Kocab
Dietmar Debus
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Viessmann Werke GmbH and Co KG
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Viessmann Werke GmbH and Co KG
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Publication of EP0632239A1 publication Critical patent/EP0632239A1/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00Details
    • F24H9/0005Details for water heaters
    • F24H9/001Guiding means
    • F24H9/0026Guiding means in combustion gas channels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/24Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers
    • F24H1/26Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body
    • F24H1/28Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body including one or more furnace or fire tubes
    • F24H1/287Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body including one or more furnace or fire tubes with the fire tubes arranged in line with the combustion chamber

Definitions

  • the invention relates to a heating gas flue for installation in a boiler housing between its combustion chamber and the exhaust-side closure wall of the water-carrying housing interior, consisting of a pocket made of thin-walled, metallic material with an essentially elongated cross section, the length and height of which correspond to a multiple of its width.
  • heating gas flue pipes are also known, for example according to DE-U-83 27 692 and DE-A-38 10 035, which consist of an outer and an inner pipe, the outer pipe being used only in partial areas to influence the heat transfer is applied to the inner tube by circumferential contact deformations.
  • the invention is therefore based on the object to improve a Hosokuar or a Walkergaszugtasche of the type mentioned in such a way that the thinnest possible sheet metal can be used for the water-side wall, the means for targeted heat transfer control at the same time as a support for stiffening the pressure of the large area Side walls of the bag should serve.
  • a heating gas flue of the type mentioned according to the invention in that the entire inner surface of the pocket is covered with a shape-adapted inner shell made of different material with respect to the material of the outer wall, the inner shell only in partial areas with the outer wall in direct contact stands and the two side walls of the inner shell are only supported against one another in some areas.
  • the inner shell can be introduced into the cladding sheet forming the actual pocket either by pressing in, but it is also possible for the thin cladding sheet as a suitably sized blank, as a kind of bandage, to place the inner shell as tightly as possible and then to close it with a longitudinal weld.
  • the inner shell In order to be able to manufacture the inner shell as expediently as possible, it is formed from two parts which are identical in cross-section and which abut one another in the longitudinal center plane of the pocket.
  • profiles can either be milled or embossed, depending on whether the profiles are on the inner shell or the inner shell parts or on the cladding sheet. If the two shell parts are extruded profiles, such profiles can be created directly during extrusion.
  • longitudinal ribs can be arranged between the supporting longitudinal ribs parallel to these, which end free of counter ribs on the other side in the interior of the pocket. This is also possible without problems during extrusion production.
  • the two parts forming the inner shell can also be formed from sheet metal blanks and the longitudinal ribs can be produced on them by folding the sheet metal.
  • a single-shell combustion chamber connection pocket with a corresponding external cross section is arranged at the inflow opening of the pocket and this on the pocket side with a circumferential offset provided, which overlaps the inner shell at its opening edge, which is kept free by longitudinal ribs.
  • the indentation can also be formed from two steps, the first step resting against the inside of the opening edge of the outer wall and the second step engaging over the inner shell.
  • the inner shell protrudes slightly from the cladding sheet on the outflow side, so that when the pocket is installed, and this applies in particular to cases of arrangement with vertical flow of the heating gases, any condensate formed can drip off and not wet the end wall into which the bag is bound with this end.
  • the heating gas flue basically consists of a pocket 5 made of thin-walled, metallic material with an essentially elongated cross section, the length L and height H of which correspond to a multiple of its width B (see FIG. 1).
  • the entire inner surface F of the pocket 5 is covered with a form-fitting inner shell 6, made of different material with respect to the material of the outer wall 7, and the inner shell 6 is only in direct contact with the outer wall 7 in partial areas TB.
  • the two side walls of the inner shell 6 are also supported against one another only in partial areas TB 1.
  • the end edges 9 of the pocket 5 are designed as shown, i.e., seen in cross section, they form semicircles.
  • the pocket 5 is connected vertically downward to the combustion chamber 2, a plurality of such pockets 5 extending from the combustion chamber 2 parallel to one another at a distance approximately equal to the pocket width B.
  • FIGS. 2 to 6 With regard to the structural details of the pocket 5, reference is made to FIGS. 2 to 6.
  • the inner shell 6 is preferably formed from two parts 6 ′ which are identical in cross-section and which are butted against one another in the longitudinal center plane E of the pocket 5. Shape identity is given in the exemplary embodiment according to FIG. 2, in which the parts 6 'are made, for example, of extruded aluminum profiles exist, the supporting portions TB1 of the side walls 8 of the inner shell 6 are formed from longitudinal ribs 10 extending parallel to the flow direction DR. Between the longitudinal ribs 10 are arranged parallel to these further longitudinal ribs 10 ', which end free of counter ribs on the other side in the interior 11 of the pocket 5.
  • FIG. 3 differs from that according to FIG. 2 in that the two parts 6 'are formed from sheet metal blanks 12 and the longitudinal ribs 10, 10' are formed on them from folds of the sheet metal blank .
  • the two parts 6 ' to be made of, for example, stainless steel sheet, which, as shown, has offset portions at its end edges 17', in order to ensure good mutual contact in the longitudinal center plane E in these areas as well.
  • the supporting sub-areas TB result in the exemplary embodiment according to FIG. 2 by the longitudinal ribs 10 butted against one another and in the exemplary embodiment according to FIG. 3 by the higher folded longitudinal ribs 10 which, as shown, rest on the other part 6 '. A folding in the sense of FIG. 2 would also be possible.
  • the other longitudinal ribs 10 ' serve to enlarge the transmission area here and there.
  • the cladding sheet or the outer wall 7 of the pocket 5 is provided with embossed profiles 8 (see also FIG. 7), through which gaps 18 arise between the cladding sheet and the inner shell 6, which prevent direct heat contact .
  • a single-shell combustion chamber connection pocket 14 with a corresponding outer cross section is arranged on the inflow-side opening 13 of the pocket 5, which is provided on the pocket side with a circumferential indentation 15 which overlaps the inner shell 6 on its opening edge 16 which is kept free by longitudinal ribs 10, 10 '.
  • the indentation 15 is formed from two steps 15 ', 15'', the first step 15' resting on the inside of the opening edge of the outer wall 7 and the second step 15 '' engaging over the inner shell 6.
  • This combustion chamber connection pocket 14 thus practically represents a flat inflow funnel for the heating gases, which blinds or shields the gap 19 between the inner shell 6 and the outer wall 7 of the pocket 5.
  • the inner shell 6 projects beyond the outer wall 7 of the pocket 5 on the outflow side, as is also illustrated in FIG. 7 below, that is, only the outer wall 7 of the pocket 5 is connected to the closure wall 3 of the boiler housing 1 in a liquid-tight manner, below which is the flue gas collection chamber 20 with the exhaust port (not shown).
  • the pockets 5 described can of course also horizontally if necessary. weak heating to the fume side can be arranged in a boiler and are then arranged between the vertical combustion chamber floor and the likewise vertical closure wall 3 of the boiler housing 1.

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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)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Treating Waste Gases (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Housings, Intake/Discharge, And Installation Of Fluid Heaters (AREA)

Abstract

The invention relates to a hot gas passage for installation in a boiler casing between its combustion chamber and the outlet-side closing wall of the water-carrying casing interior, consisting of a pocket of thin-walled, metallic material with a cross-section substantially in the form of an elongated hole, the length and height of which pocket are a multiple of its width. To solve the object of improving a hot gas passage or a hot gas passage pocket of the generic type in a simple way such that the thinnest sheet metal possible can be used for the water-side wall while the means for specifically influencing the heat transfer are at the same time to serve as supporting means for pressure reinforcement of the large-area sidewalls of the pocket, the hot gas passage according to the invention is constructed in such a way that the entire inner surface (F) of the pocket (5) is lined with an inner shell (6) conformed in shape and made of a material different from the material of the outer wall (7), the inner shell (6) being in direct contact, only in partial regions, with the outer wall (7) and the two sidewalls of the inner shell (6) being supported against one another likewise only in partial regions. <IMAGE>

Description

Die Erfindung betrifft einen Heizgaszug für den Einbau in ein Heizkesselgehäuse zwischen dessen Brennkammer und der abzugsseitigen Verschlußwand des wasserführenden Gehäuseinnenraumes, bestehend aus einer Tasche aus dünnwandigem, metallischen Material mit im wesentlichen langlochförmigen Querschnitt, deren Länge und Höhe einem Vielfachen ihrer Breite entsprechen.The invention relates to a heating gas flue for installation in a boiler housing between its combustion chamber and the exhaust-side closure wall of the water-carrying housing interior, consisting of a pocket made of thin-walled, metallic material with an essentially elongated cross section, the length and height of which correspond to a multiple of its width.

Solche in Form einer Tasche ausgebildeten Heizgaszüge, die in der Regel zu mehreren parallel nebeneinander angeordnet die Brennkammer mit dem Rauchgasabzug eines Heizkessels verbinden, und zwar entweder in Horizontal- oder Vertikalanordnung je nach Kesselkonstruktion, sind allgemein bekannt und in Benutzung, so daß es diesbezüglich keines besonderen druckschriftlichen Nachweises bedarf. Im Gegensatz zu solchen taschenartigen Heizgaszügen sind auch Heizgaszugrohre bspw. nach dem DE-U- 83 27 692 und der DE- A- 38 10 035 bekannt, die aus einem Außen- und aus einem Innenrohr bestehen, wobei das Außenrohr zwecks Wärmeübergangsbeeinflussung nur in Teilbereichen an das Innenrohr durch umlaufende Anpreßverformungen angelegt ist. Vermutlich wegen der in Bezug auf ein Rohr ungünstigeren Geometrie hat man, soweit bekannt, eine doppelwandige Ausbildung solcher Heizgaszugtaschen noch nicht in Betracht gezogen, d.h., in Rücksicht auf Druckstabilität mußte das die Taschen bildende Blech entsprechend dick sein und mit Versteifungsprägungen versehen werden, oder dünnes Blech mußte mit sehr dicht zueinander verlaufenden Prägungen versehen werden, um eine ausreichende Druckfestigkeit zu erreichen. Eine Einflußnahme auf den Wärmeübergang, um Kondensatbildung zu verhindern bzw. weitgehend zu verhindern, ist mit solchen Taschen jedenfalls nicht möglich.Such in the form of a pocket-shaped heating gas flues, which as a rule connect the combustion chamber to the flue gas discharge of a boiler in parallel to one another, either in a horizontal or vertical arrangement depending on the boiler design, are generally known and in use, so that there is none special printed evidence is required. In contrast to such pocket-type heating gas flues, heating gas flue pipes are also known, for example according to DE-U-83 27 692 and DE-A-38 10 035, which consist of an outer and an inner pipe, the outer pipe being used only in partial areas to influence the heat transfer is applied to the inner tube by circumferential contact deformations. Probably because of the more unfavorable geometry with regard to a pipe, as far as is known, a double-walled design of such hot gas pockets has not yet been considered, ie, in view of pressure stability, the sheet metal forming the pockets had to be correspondingly thick and with stiffening embossments be provided, or thin sheet metal had to be provided with embossings running very close to one another in order to achieve sufficient pressure resistance. In any case, it is not possible to influence the heat transfer in order to prevent or largely prevent the formation of condensate.

Der Erfindung liegt demgemäß die Aufgabe zugrunde, einen Heizgaszug bzw. eine Heizgaszugtasche der eingangs genannten Art auf einfache Weise dahingehend zu verbessern, daß für die wasserseitige Wand möglichst dünnes Blech verwendet werden kann, wobei die Mittel zur gezielten Wärmeübergangsbeeinflussung gleichzeitig als Abstützmittel zur Druckaussteifung der großflächigen Seitenwände der Tasche dienen sollen.The invention is therefore based on the object to improve a Heizgaszug or a Heizgaszugtasche of the type mentioned in such a way that the thinnest possible sheet metal can be used for the water-side wall, the means for targeted heat transfer control at the same time as a support for stiffening the pressure of the large area Side walls of the bag should serve.

Diese Aufgabe ist mit einem Heizgaszug der eingangs genannten Art nach der Erfindung dadurch gelöst, daß die gesamte Innenfläche der Tasche mit einer formangepaßten Innenschale aus in bezug auf das Material der Außenwand unterschiedlichem Material belegt ist, wobei die Innenschale nur in Teilbereichen mit der Außenwand in Direktkontakt steht und die beiden Seitenwände der Innenschale ebenalls nur in Teilbereichen gegeneinander abgestützt sind.This object is achieved with a heating gas flue of the type mentioned according to the invention in that the entire inner surface of the pocket is covered with a shape-adapted inner shell made of different material with respect to the material of the outer wall, the inner shell only in partial areas with the outer wall in direct contact stands and the two side walls of the inner shell are only supported against one another in some areas.

Die Einbringung der Innenschale in das die eigentliche Tasche bildende Hüllblech kann entweder durch Einpressen erfolgen, es ist aber auch möglich, den das dünne Hüllblech als entsprechend bemessenen Zuschnitt gewissermaßen als Bandage um die Innenschale so dicht wie möglich anzulegen und dann mit einer Längsschweißnaht zu schließen.The inner shell can be introduced into the cladding sheet forming the actual pocket either by pressing in, but it is also possible for the thin cladding sheet as a suitably sized blank, as a kind of bandage, to place the inner shell as tightly as possible and then to close it with a longitudinal weld.

Abgesehen davon, daß man für die Innenschale bedarfsangepaßt das dafür geeignetste Material auswählen kann, werden die gemäß Aufgabe gestellten Forderungen, nämlich einerseits Abstützung des dünnen Hüllbleches gegen Druck von außen und gleichzeitig gezielte Anordnung von Bereichen guten und geminderten Wärmeüberganges auf sehr einfache Weise erreicht.Apart from the fact that you can select the most suitable material for the inner shell as required, the requirements set according to the task, namely on the one hand support of the thin cladding sheet against external pressure and at the same time targeted arrangement of areas of good and reduced heat transfer are achieved in a very simple manner.

Vorteilhafte weitere Ausgestaltungen bestehen im folgenden:
Um die Innenschale so zweckmäßig wie möglich herstellen zu können, ist diese aus zwei im Querschnitt formidentischen Teilen gebildet, die in der Längsmittelebene der Tasche gegeneinander gestoßen sind.
Advantageous further developments are as follows:
In order to be able to manufacture the inner shell as expediently as possible, it is formed from two parts which are identical in cross-section and which abut one another in the longitudinal center plane of the pocket.

Um die Bereiche für einen durch Direktkontakt bewirkten guten bzw. auf die anderen Bereiche erhöhten Wärmeübergang zu erzielen, welche Bereiche allerdings zwecks Kondensatvermeidung so klein wie möglich zu halten sind, sind diese durch nach innen oder außen gerichtete Profilierungen an der Außenwand und/oder der Innenschale gebildet und die sich abstützenden Teilbereiche der Seitenwände der Innenschale aus sich parallel zur Durchströmrichtung erstreckenden Längsrippen.In order to achieve the areas for good heat transfer caused by direct contact or increased heat transfer to the other areas, which areas are to be kept as small as possible in order to avoid condensate, they are formed by inward or outward profiling on the outer wall and / or the inner shell formed and the supporting portions of the side walls of the inner shell from longitudinal ribs extending parallel to the flow direction.

Was die Profilierungen betrifft, so können diese entweder gefräst oder geprägt werden, je nachdem, ob sich die Profilierungen an der Innenschale bzw. den Innenschalenteilen oder am Hüllblech befinden. Falls die beiden Schalenteile Strangpreßprofile sind, können solche Profilierungen direkt beim Strangpressen mit erzeugt werden.As far as the profiles are concerned, they can either be milled or embossed, depending on whether the profiles are on the inner shell or the inner shell parts or on the cladding sheet. If the two shell parts are extruded profiles, such profiles can be created directly during extrusion.

Um die wirksame gasseitige Wärmeübertragungsfläche zu vergrößern, können zwischen den sich abstützenden Längsrippen prallel zu diesen weitere Längsrippen angeordnet sein, die frei von Gegenrippen der anderen Seite im Innenraum der Tasche enden. Auch dies ist problemlos bei der Strangpreßherstellung möglich. Die beiden, die Innenschale bildenden Teile können aber auch aus Blechzuschnitten gebildet und an diesen die Längsrippen durch Faltungen des Bleches erzeugt werden.In order to enlarge the effective gas-side heat transfer area, further longitudinal ribs can be arranged between the supporting longitudinal ribs parallel to these, which end free of counter ribs on the other side in the interior of the pocket. This is also possible without problems during extrusion production. The two parts forming the inner shell can also be formed from sheet metal blanks and the longitudinal ribs can be produced on them by folding the sheet metal.

Zwecks einfacher Einbindung bzw. Anbindung der Tasche an die Brennkammer, aber auch um den Spalt zwischen Hüllblech und Innenschale zuströmseitig zu verschließen bzw. zu verblenden, ist an der zuströmseitigen Öffnung der Tasche eine einschalige Brennkammeranschlußtasche mit entsprechendem Außenquerschnitt angeordnet und diese taschenseitig mit einer umlaufenden Einkröpfung versehen, die die Innenschale an ihrem von Längsrippen freigehaltenen Öffnungsrand übergreift. Dabei kann die Einkröpfung auch aus zwei Stufen gebildet sein, wobei die erste Stufe am Öffnungsrand der Außenwand innen anliegt und die zweite Stufe die Innenschale übergreift.For the simple integration or connection of the pocket to the combustion chamber, but also to close or blend the gap between the cladding sheet and the inner shell on the inflow side, a single-shell combustion chamber connection pocket with a corresponding external cross section is arranged at the inflow opening of the pocket and this on the pocket side with a circumferential offset provided, which overlaps the inner shell at its opening edge, which is kept free by longitudinal ribs. The indentation can also be formed from two steps, the first step resting against the inside of the opening edge of the outer wall and the second step engaging over the inner shell.

Eine weitere vorteilhafte Ausführungsform besteht darin, daß die Innenschale abströmseitig geringfügig aus dem Hüllblech herausragt, wodurch im eingebauten Zustand der Tasche, und dies gilt insbesondere für Anordnungsgfälle mit vertikaler Durchströmung der Heizgase, sich etwa gebildetes Kondensat abtropfen kann und nicht die Abschlußwand benetzt, in die die Tasche mit diesem Ende eingebunden ist.Another advantageous embodiment is that the inner shell protrudes slightly from the cladding sheet on the outflow side, so that when the pocket is installed, and this applies in particular to cases of arrangement with vertical flow of the heating gases, any condensate formed can drip off and not wet the end wall into which the bag is bound with this end.

Der neuartige Heizgaszug wird nachfolgend anhand der zeichnerischen Darstellung von Ausführungsbeispielen näher erläutert.The novel heating gas flue is explained in more detail below with the aid of exemplary embodiments.

Es zeigt

Fig. 1
perspektivisch den in Form einer Tasche ausgebildeten Heizgaszug;
Fig. 2
einen Schnitt durch die Tasche mit einer zweiteiligen Innenschale aus Alu-Strangpreßprofil;
Fig. 3
einen Schnitt durch die Tasche mit zweiteiliger Innenschale aus gefaltetem Blech;
Fig. 4, 5
vergrößerte Schnitte durch zwei Ausführungsformen der Taschenwand;
Fig. 6
im Schnitt den Vertikalanschluß einer Tasche an eine Brennkammer und
Fig. 7
im Schnitt und vergrößert das obere und das untere Ende der in einen Heizkessel eingebundenen Tasche.
It shows
Fig. 1
in perspective the hot gas flue in the form of a pocket;
Fig. 2
a section through the bag with a two-part inner shell made of extruded aluminum profile;
Fig. 3
a section through the bag with two-part inner shell made of folded sheet metal;
4, 5
enlarged sections through two embodiments of the pocket wall;
Fig. 6
on average the vertical connection of a pocket to a combustion chamber and
Fig. 7
in section and enlarges the upper and lower end of the pocket integrated in a boiler.

Unabhängig von den im einzelnen zu beschreibenden Ausführungsbeispielen besteht der Heizgaszug grundsätzlich aus einer Tasche 5 aus dünnwandigem, metallischen Material mit im wesentlichen langlochförmigen Querschitt, deren Länge L und Höhe H einem Vielfachen ihrer Breite B entsprechen (siehe Fig. 1 ). Die gesamte Innenfläche F der Tasche 5 ist mit einer formangepaßten Innenschale 6, aus in bezug auf das Material der Außenwand 7 unterschiedlichem Material belegt und die Innenschale 6 steht nur in Teilbereichen TB mit der Außenwand 7 in Direktkontakt. Die beiden Seitenwände der Innenschale 6 sind dabei ebenfalls nur in Teilbereichen TB₁ gegeneinander abgestützt. Die Endränder 9 der Tasche 5 sind wie dargestelt ausgebildet, d.h., diese bilden, im Querschnitt gesehen, Halbkreise.Regardless of the embodiments to be described in detail, the heating gas flue basically consists of a pocket 5 made of thin-walled, metallic material with an essentially elongated cross section, the length L and height H of which correspond to a multiple of its width B (see FIG. 1). The entire inner surface F of the pocket 5 is covered with a form-fitting inner shell 6, made of different material with respect to the material of the outer wall 7, and the inner shell 6 is only in direct contact with the outer wall 7 in partial areas TB. The two side walls of the inner shell 6 are also supported against one another only in partial areas TB 1. The end edges 9 of the pocket 5 are designed as shown, i.e., seen in cross section, they form semicircles.

Beim Ausführungsbeispiel eines Heizkessels gemäß Fig. 7 ist die Tasche 5 vertikal nach unten an die Brennkammer 2 angeschlossen, wobei mehrere solcher Taschen 5 parallel zueinander mit einem etwa der Taschenbreite B entsprechenden Abstand von der Brennkammer 2 abgehen.In the exemplary embodiment of a boiler according to FIG. 7, the pocket 5 is connected vertically downward to the combustion chamber 2, a plurality of such pockets 5 extending from the combustion chamber 2 parallel to one another at a distance approximately equal to the pocket width B.

Bezüglich der baulichen Einzelheiten der Tasche 5 wird auf Fig. 2 bis 6 Bezug genommen.With regard to the structural details of the pocket 5, reference is made to FIGS. 2 to 6.

Bevorzugt ist dabei die Innenschale 6 aus zwei im Querschnitt formidentischen Teilen 6' gebildet, die in der Längsmittelebene E der Tasche 5 gegeneinander gestoßen sind. Formidentität ist dabei beim Ausführungsbeispiel gemäß Fig. 2 gegeben, bei dem die Teile 6' bspw. aus ALU-Strangpreßprofilen bestehen, wobei die sich abstützenden Teilbereiche TB₁ der Seitenwände 8 der Innenschale 6 aus sich parallel zur Durchströmrichtung DR erstreckenden Längsrippen 10 gebildet sind. Zwischen den Längsrippen 10 sind parallel zu diesen weitere Längsrippen 10' angeordnet, die frei von Gegenrippen der anderen Seite im Innenraum 11 der Tasche 5 enden. Im entsprechend zusammengefügten Zustand der beiden Teile 6' werden diese entweder in die fertige Außenwand 7 eingepreßt oder die Außenwand 7 wird als entsprechend bemessener Blechzuschnitt wie eine Bandage um die Innenschale 6 gelegt (ggfls. im erwärmten Zustand) und mit einer Längsschweißnaht 17 geschlossen.The inner shell 6 is preferably formed from two parts 6 ′ which are identical in cross-section and which are butted against one another in the longitudinal center plane E of the pocket 5. Shape identity is given in the exemplary embodiment according to FIG. 2, in which the parts 6 'are made, for example, of extruded aluminum profiles exist, the supporting portions TB₁ of the side walls 8 of the inner shell 6 are formed from longitudinal ribs 10 extending parallel to the flow direction DR. Between the longitudinal ribs 10 are arranged parallel to these further longitudinal ribs 10 ', which end free of counter ribs on the other side in the interior 11 of the pocket 5. In the correspondingly assembled state of the two parts 6 'they are either pressed into the finished outer wall 7 or the outer wall 7 is placed as a suitably dimensioned sheet metal blank like a bandage around the inner shell 6 (possibly in the heated state) and closed with a longitudinal weld seam 17.

Für die Ausführungsform nach Fig. 3 gilt praktisch das Gleiche, die sich aber von dem nach Fig. 2 dadurch unterscheidet, daß hierbei die beiden Teile 6' aus Blechzuschnitten 12 gebildet und an diesen die Längsrippen 10, 10' aus Faltungen des Blechzuschnittes gebildet sind.The same applies to the embodiment according to FIG. 3, which differs from that according to FIG. 2 in that the two parts 6 'are formed from sheet metal blanks 12 and the longitudinal ribs 10, 10' are formed on them from folds of the sheet metal blank .

Zwar nicht dargestellt, aber machbar wäre auch hierbei Formidentität der beiden Teile 6' aus bspw. Edelstahlblech, daß an seinen Endrändern 17', wie dargestellt, Abkröpfungen aufweist, um auch in diesen Bereichen eine gute gegenseitige Anlage in der Längsmittelebene E zu gewährleisten.Although not shown, it would also be feasible here for the two parts 6 'to be made of, for example, stainless steel sheet, which, as shown, has offset portions at its end edges 17', in order to ensure good mutual contact in the longitudinal center plane E in these areas as well.

Die sich abstützenden Teilbereiche TB ergeben sich bei Ausführungsbeispiel nach Fig. 2 durch die gegeneinander gestoßenen Längsrippen 10 und beim Ausführungsbeispiel nach Fig. 3 durch die höher gefalteten Längsrippen 10, die, wie dargestellt, am jeweils anderen Teil 6' anliegen. Eine Faltung im Sinne der Fig. 2 wäre jedoch auch möglich. Die anderen Längsrippen 10' dienen hier wie dort der Übertragungsflächenvergrößerung.The supporting sub-areas TB result in the exemplary embodiment according to FIG. 2 by the longitudinal ribs 10 butted against one another and in the exemplary embodiment according to FIG. 3 by the higher folded longitudinal ribs 10 which, as shown, rest on the other part 6 '. A folding in the sense of FIG. 2 would also be possible. The other longitudinal ribs 10 'serve to enlarge the transmission area here and there.

Was nun die Teilbereiche TB₁ betrifft, wird auf die vergrößert dargestellten Schnitte der Fig. 4, 5 verwiesen. Beim Ausführungsbeispiel nach Fig. 4 ist das Hüllblech bzw. die Außenwand 7 der Tasche 5, wie dargestellt, mit geprägten Profilierungen 8 (siehe auch Fig. 7) versehen, durch die zwischen Hüllblech und Innenschale 6 Spalten 18 entstehen, die einen direkten Wärmetastkontakt unterbinden.As far as the sub-areas TB₁ are concerned, reference is made to the enlarged sections of FIGS. 4, 5. In the embodiment according to FIG. 4, the cladding sheet or the outer wall 7 of the pocket 5, as shown, is provided with embossed profiles 8 (see also FIG. 7), through which gaps 18 arise between the cladding sheet and the inner shell 6, which prevent direct heat contact .

Gleiches ist beim Ausführungsbeispiel nach Fig. 5 erreicht, wobei die entsprechenden Profilierungen 8 am Teil 6' bzw. der Innenschale 6 vorgesehen sind. Je nach Material der Teile 6' lassen sich solche Profilierungen 8 beim Strangpressen mitberücksichtigen oder durch Ausfräsen der Spalten 18 oder auch durch Prägen, wenn es sich bei den Teilen 6' um Blech handelt.The same is achieved in the exemplary embodiment according to FIG. 5, the corresponding profiles 8 being provided on the part 6 ′ or the inner shell 6. Depending on the material of the parts 6 ', such profiles 8 can be taken into account during extrusion or by milling out the gaps 18 or also by embossing if the parts 6' are sheet metal.

Was den Anschluß der Tasche bzw. der Taschen 5 an die Brennkammer 2 betrifft, so wird hierzu auf Fig. 6, 7 verwiesen. Hiernach ist an der zuströmseitigen Öffnung 13 der Tasche 5 eine einschalige Brennkammeranschlußtasche 14 mit entsprechendem Außenquerschnitt angeordnet, die taschenseitig mit einer umlaufenden Einkröpfung 15 versehen ist, die die Innenschale 6 an ihrem von Längsrippen 10, 10' freigehaltenen Öffnungsrand 16 übergreift. Beim dargestellten Ausführungsbeispiel ist dabei die Einkröpfung 15 aus zwei Stufen 15', 15'' gebildet, wobei die erste Stufe 15' am Öffnungsrand der Außenwand 7 innen anliegt und die zweite Stufe 15'' die Innenschale 6 übergreift. Diese Brennkammeranschlußtasche 14 stellt also praktisch einen flachen Einströmtrichter für die Heizgase dar, der den Spalt 19 zwischen Innenschale 6 und Außenwand 7 der Tasche 5 verblendet bzw. abschirmt. Am anderen Ende der Tasche 5 überragt die Innenschale 6 abströmseitig die Außenwand 7 der Tasche 5, wie dies ebenfalls in Fig. 7 unten verdeutlicht ist, d.h., nur die Außenwand 7 der Tasche 5 ist flüssigkeitsdicht mit der verschlußwand 3 des Heizkesselgehäuses 1 verbunden, unter der sich die Rauchgassammelkammer 20 mit dem Abzugsanschluß (nicht dargestellt) befindet.With regard to the connection of the pocket or pockets 5 to the combustion chamber 2, reference is made to FIGS. 6, 7. According to this, a single-shell combustion chamber connection pocket 14 with a corresponding outer cross section is arranged on the inflow-side opening 13 of the pocket 5, which is provided on the pocket side with a circumferential indentation 15 which overlaps the inner shell 6 on its opening edge 16 which is kept free by longitudinal ribs 10, 10 '. In the illustrated In the exemplary embodiment, the indentation 15 is formed from two steps 15 ', 15'', the first step 15' resting on the inside of the opening edge of the outer wall 7 and the second step 15 '' engaging over the inner shell 6. This combustion chamber connection pocket 14 thus practically represents a flat inflow funnel for the heating gases, which blinds or shields the gap 19 between the inner shell 6 and the outer wall 7 of the pocket 5. At the other end of the pocket 5, the inner shell 6 projects beyond the outer wall 7 of the pocket 5 on the outflow side, as is also illustrated in FIG. 7 below, that is, only the outer wall 7 of the pocket 5 is connected to the closure wall 3 of the boiler housing 1 in a liquid-tight manner, below which is the flue gas collection chamber 20 with the exhaust port (not shown).

Die beschriebenen Taschen 5 können natürlich auch horizontal bei ggfls. schwacher Heizung zur Abzugsseite hin in einem Heizkessel angeordnet werden und sind dann zwischen dem vertikalen Brennkammerboden und der ebenfalls vertikalen verschlußwand 3 des Heizkesselgehäuses 1 angeordnet.The pockets 5 described can of course also horizontally if necessary. weak heating to the fume side can be arranged in a boiler and are then arranged between the vertical combustion chamber floor and the likewise vertical closure wall 3 of the boiler housing 1.

Claims (11)

Heizgaszug für den Einbau in ein Heizkesselgehäuse (1) zwischen dessen Brennkammer (2) und der abzugsseitigen Verschlußwand (3) des wasserführenden Gehäuseinnenraumes (4), bestehend aus einer Tasche (5) aus dünnwandigem, metallischem Material mit im wesentlichen langlochförmigen Querschnitt, deren Länge (L) und Höhe (H) einem Vielfachen ihrer Breite (B) entsprechen,
dadurch gekennzeichnet,
daß die gesamte Innenfläche (F) der Tasche (5) mit einer formangepaßten Innenschale (6) aus in bezug auf das Material der Außenwand (7) unterschiedlichem Material belegt ist, wobei die Innenschale (6) nur in Teilbereichen (TB) mit der Außenwand (7) in Direktkontakt steht und die beiden Seitenwände (8) der Innenschale (6) ebenfalls nur in Teilbereichen (TB₁)gegeneinander abgestützt sind.
Hot gas flue for installation in a boiler housing (1) between its combustion chamber (2) and the exhaust-side closure wall (3) of the water-bearing housing interior (4), consisting of a pocket (5) made of thin-walled, metallic material with an essentially elongated cross-section, the length of which (L) and height (H) correspond to a multiple of their width (B),
characterized,
that the entire inner surface (F) of the pocket (5) is covered with a form-fitting inner shell (6) made of different material with respect to the material of the outer wall (7), the inner shell (6) only in partial areas (TB) with the outer wall (7) is in direct contact and the two side walls (8) of the inner shell (6) are also only supported against one another in partial areas (TB 1).
Heizgaszug nach Anspruch 1,
dadurch gekennzeichnet,
daß die Innenschale (6) aus zwei im Querschnitt formidentischen Teilen (6') gebildet ist, die in der Längsmittelebene (E) der Tasche (5) gegeneinander gestoßen sind.
Heating gas flue according to claim 1,
characterized,
that the inner shell (6) is formed from two parts (6 ') of identical shape in cross section, which are butted against one another in the longitudinal center plane (E) of the pocket (5).
Heizgaszug nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß die Teilbereiche (TB) durch nach innen oder außen gerichtete Profilierungen (8) an der Außenwand (7) und/oder der Innenschale (6) gebildet sind.
Heating gas flue according to claim 1 or 2,
characterized,
that the sub-areas (TB) are formed by inward or outward profiling (8) on the outer wall (7) and / or the inner shell (6).
Heizgaszug nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß die sich abstützenden Teilbereiche (TB₁) der Seitenwände (8) der Innenschale (6) aus sich parallel zur Durchströmrichtung (DR) erstreckenden Längsrippen (10) gebildet sind.
Hot gas flue according to one of claims 1 to 3,
characterized,
that the supporting portions (TB₁) of the side walls (8) of the inner shell (6) from parallel to the flow direction (DR) extending longitudinal ribs (10) are formed.
Heizgaszug nach Anspruch 4,
dadurch gekennzeichnet,
daß zwischen den Längsrippen (10) parallel zu diesen weitere Längsrippen (10') angeordnet sind, die frei von Gegenrippen der anderen Seite im Innenraum (11) der Tasche (5) enden.
Heating gas flue according to claim 4,
characterized,
that between the longitudinal ribs (10) parallel to these further longitudinal ribs (10 ') are arranged which end free of counter ribs on the other side in the interior (11) of the pocket (5).
Heizgaszug nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet,
daß die beiden formidentischen Teile (6') als Strangpreßprofile ausgebildet sind.
Hot gas flue according to one of claims 1 to 5,
characterized,
that the two shape-identical parts (6 ') are designed as extruded profiles.
Heizgaszug nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet,
daß die beiden Teile (6') aus Blechzuschnitten (12) gebildet und an diesen die Längsrippen (10, 10') aus Faltungen des Blechzuschnittes gebildet sind.
Hot gas flue according to one of claims 1 to 5,
characterized,
that the two parts (6 ') from sheet metal blanks (12) formed and on these the longitudinal ribs (10, 10 ') are formed from folds of the sheet metal blank.
Heizgaszug nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet,
daß an der zuströmseitigen Öffnung (13) der Tasche (5) eine einschalige Brennkammeranschlußtasche (14) mit entsprechendem Außenquerschnitt angeordnet und diese taschenseitig mit einer umlaufenden Einkröpfung (15) versehen ist, die die Innenschale (6) an ihrem von Längsrippen (10, 10') freigehaltenen Öffnungsrand (16) übergreift.
Heating gas flue according to one of claims 1 to 7,
characterized,
that at the inflow-side opening (13) of the pocket (5) a single-shell combustion chamber connection pocket (14) with a corresponding outer cross-section is arranged and this is provided on the pocket side with a circumferential indentation (15) which seals the inner shell (6) on its longitudinal ribs (10, 10 ') overlaps the opening edge (16).
Heizgaszug nach Anspruch 8,
dadurch gekennzeichnet,
daß die Einkröpfung (15) aus zwei Stufen (15', 15'') gebildet ist, wobei die erste Stufe (15') am Öffnungsrand der Außenwand (7) innen anliegt und die zweite Stufe (15'') die Innenschale (6) übergreift.
Hot gas flue according to claim 8,
characterized,
that the indentation (15) is formed from two steps (15 ', 15''), the first step (15') resting on the inside of the opening edge of the outer wall (7) and the second step (15 '') the inner shell (6 ) overlaps.
Heizgaszug nach einem der Ansprüche 1 bis 9,
daß die Endränder (9) der Tasche (5) halbkreisförmig gerundet sind.
Hot gas flue according to one of claims 1 to 9,
that the end edges (9) of the pocket (5) are rounded in a semicircle.
Heizgaszugtasche nach einem der Ansprüche 1 bis 10,
dadurch gekennzeichnet,
daß die Innenschale (6) abströmseitig die Außenwand (7) der Tasche (5) überragt.
Hot gas train bag according to one of claims 1 to 10,
characterized,
that the inner shell (6) on the outflow side projects beyond the outer wall (7) of the pocket (5).
EP94110188A 1993-07-01 1994-06-30 Hot gas passage Expired - Lifetime EP0632239B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9309771U 1993-07-01
DE9309771U DE9309771U1 (en) 1993-07-01 1993-07-01 Hot gas flue

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EP0632239A1 true EP0632239A1 (en) 1995-01-04
EP0632239B1 EP0632239B1 (en) 1996-11-20

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AT (1) ATE145470T1 (en)
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Cited By (3)

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DE102008031158A1 (en) * 2008-07-03 2010-01-07 Behr Gmbh & Co. Kg Extruded tube for e.g. intercooler in motor vehicle, has two parallel outside side walls comprising embossings that serve to form bulged portions that project into two ducts, where continuous web extends between side walls
EP3096093A1 (en) 2015-05-21 2016-11-23 Viessmann Werke GmbH & Co. KG Heating device
US10533769B2 (en) 2017-07-28 2020-01-14 Viessmann Werke Gmbh & Co Kg Heating device

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DE9405062U1 (en) * 1994-03-24 1994-05-26 Hoval Interliz Ag, Vaduz-Neugut Heat exchanger tube for boilers
ES2642289T3 (en) * 2011-05-17 2017-11-16 Aic S.A. Boiler
EP3511665B1 (en) * 2016-09-09 2023-12-13 Kyungdong Navien Co., Ltd. Tube assembly for tubular heat exchanger, and tubular heat exchanger comprising same

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EP3096093A1 (en) 2015-05-21 2016-11-23 Viessmann Werke GmbH & Co. KG Heating device
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Also Published As

Publication number Publication date
EP0632239B1 (en) 1996-11-20
DE59401065D1 (en) 1997-01-02
ATE145470T1 (en) 1996-12-15
DE9309771U1 (en) 1993-08-26

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