EP0706016B1 - Gas boiler - Google Patents

Gas boiler Download PDF

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Publication number
EP0706016B1
EP0706016B1 EP95114855A EP95114855A EP0706016B1 EP 0706016 B1 EP0706016 B1 EP 0706016B1 EP 95114855 A EP95114855 A EP 95114855A EP 95114855 A EP95114855 A EP 95114855A EP 0706016 B1 EP0706016 B1 EP 0706016B1
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EP
European Patent Office
Prior art keywords
flow
pockets
gas boiler
combustion chamber
boiler 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.)
Expired - Lifetime
Application number
EP95114855A
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German (de)
French (fr)
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EP0706016A1 (en
Inventor
Helmut Prof. Dr.-Ing. Burger
Dietmar Debus
Peter Prof. Dr.-Ing. Hofbauer
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.)
Viessmann Werke GmbH and Co KG
Original Assignee
Viessmann Werke GmbH and Co KG
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Filing date
Publication date
Priority claimed from DE19944435745 external-priority patent/DE4435745C1/en
Priority claimed from DE29503697U external-priority patent/DE29503697U1/en
Application filed by Viessmann Werke GmbH and Co KG filed Critical Viessmann Werke GmbH and Co KG
Publication of EP0706016A1 publication Critical patent/EP0706016A1/en
Application granted granted Critical
Publication of EP0706016B1 publication Critical patent/EP0706016B1/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
    • 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
    • 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
    • F24H9/0015Guiding means in water channels

Definitions

  • the invention relates to a gas boiler consisting of a water-bearing housing with upper front and lower Return connection and with arranged in the upper part of the housing combustion chamber equipped with surface burner, of whose Circumferential wall made substantially parallel to each other and vertically arranged heating gas pockets to one at the bottom Exhaust gas collection chamber arranged with exhaust gas connection lead, in the upper area of the heating gas pockets and at a distance from the peripheral wall of the combustion chamber between the heating gas pockets the one between them outflowing heat transfer medium bundling and against one Partial area of the peripheral wall directing flow guides are arranged.
  • a boiler of this type is known, for example, according to EP-A-0 271 434, in which, however, the pocket packet is not attached to the peripheral wall of the combustion chamber but to the bottom thereof, and in which several horizontal partition walls are used over the entire height of the pocket packet, in order to structure the upflow space in the pockets between the pockets for the return and to ensure a targeted flow against the combustion chamber floor on the last floor.
  • a gas boiler of the relevant type is also known, for example according to DE-A-43 01 804, whose pot-like combustion chambers, which, however, are oriented horizontally with their axes, are equipped with hemispherical gas surface burners, lead to an extremely compact design of the entire combustion chamber area and, in this respect, as well of the entire gas boiler, which, however, is associated with a high thermal load on the combustion chamber walls, in particular in the area of the connections of the downward heating gas draft pockets, the connection opening cross sections of which reduce the area of the combustion chamber peripheral wall which can be cooled in this area accordingly.
  • the invention is therefore based on the object, gas boiler of the generic type with simple means to improve in that the high density in Connection area of the heating gas draw pockets to the peripheral wall of the combustion chamber transferred heat on the water side is dissipated and boiling noises are prevented, connected with the stipulation, from the outset for one as even as possible supply of the return in all To provide pocket gaps that when arranging a simple return connection in conventionally am water-bearing housing of the boiler is not given is.
  • FIG. 1 to 3 there is the gas boiler from a water-bearing housing 1 with an upper Flow connection 2 and lower return connection 3 and with arranged in the upper housing part 1 ', with surface burner 4 equipped combustion chamber 5, from its peripheral wall 6 essentially parallel and vertical to each other arranged Bankgaszugtaschen 7 to one at the bottom of the housing 1 arranged exhaust gas collection chamber 8 with exhaust gas connection 9 lead.
  • Flow guides 10 arranged.
  • FIG. 1 shows an embodiment in which the funnel-shaped flow guides 10 as Parts or connecting parts from the two open sides S of the pocket packet P veneered walls 14 are, with a part of the walls 14 as a flow trap 14 'is arranged above the return port 3.
  • the thereby bundled, specifically to the outflow openings A guided, accelerated there and against the middle Area of the combustion chamber peripheral wall 6 directed flow of the heat transfer medium is indicated by arrows that also clarify that the whole heavily loaded lower Area of the peripheral wall 6 from the center to both Sides are rinsed intensively and thus cooled what is in this degree would not be guaranteed if the entire, return water flowing in through the return connection 3, as usual, left to itself and over the whole cross section of the aquifer and only Flow dashed housing 1 upwards could.
  • the size of the outflow openings A, the inclination of the Flow guides 10 and the distance of the outflow openings A to the peripheral wall 6 can depend on the special conditions on the respective gas boiler, especially with regard to the expected maximum Thermal loads vary.
  • Fig.4 are the flow guides 10 in the form of one in relation to the width B of the heating gas pockets 7 narrower Upflow shaft 12 bounding walls 13 between the Schugaszugtaschen 7 arranged, one part of the Walls 13 as a flow trap 13 'over the return port 3 is arranged, and in the embodiment of Figure 5 are of the walls W forming the flow guides 10 the return-side walls 1o 'in the pocket spaces 7 ', as shown, angled and delimit with the other walls 10 "on the return side those directed against the peripheral wall 6 of the combustion chamber 5 Outflow openings A, i.e. there is an inflow the peripheral wall parts from the side. Also at these embodiments are the ones that arise Currents indicated by arrows.
  • FIG. 6 Flow guides 10 in the form of one and / or other side flank F of the Schugaszugtaschen 7 arranged Sheet metal strip 15 formed.
  • the metal strips 15 are attached to the flanks F of the hot gas pockets, soldered or welded on. This is done according to FIG on both adjacent flanks of two hot gas pockets, and somewhat offset from each other, so that a kind Labyrinth as flow guide 10 arises.
  • Fig. 7 can also a sealing profile on a sheet metal strip 15 15 'can be placed, or it can be used as a flow guide 10 also only one profile 16 (only schematically in FIG.
  • the flow guides 10 in the form of itself Form resilient sheet metal profiles 17 and this with their edges R in guide embossments 18 of the side flanks F of the heating gas pockets 7. As from Fig. 9 recognizable and easily imaginable, this creates a real guide channel in each of the pockets.
  • Fig. 12 finally illustrates an embodiment of the Flow guidance in the form of a sheet metal comb, the Engage "tines" 20 in the pocket spaces 7 ', this comb or the two combs each to the associated wall 14 is dotted or with this forms part.
  • FIGS. 13 to 16 differ from the ones described above in so far as Catching the inflowing water through a lower one Flow baffle takes place through a second flow baffle a cross flow is effected and only then a further cross flow along the bottom of the Combustion chamber peripheral wall 6 and this with increasing Increase in flow velocity.
  • This embodiment has proven to be the most effective, which is why this is also preferred.
  • FIGS. 16A, B A special feature is shown in FIGS. 16A, B.
  • part of the relatively cold return water is branched off and fed directly to the lower cross-flow channel 24, for which purpose separate return lines 3 'are provided in (Fig. 16A) or on (Fig. 16B) housing 1, which cut out part of the return flow to a certain extent and Mix in the hot water in the cross-flow duct 24 and lower its temperature somewhat. If such a boiler is operated in the condensing mode, this is somewhat at the expense of the use of the condensing boiler. Since in the side areas 29 of the housing 1, i.e.
  • small catch plates 30 can also be arranged on the side plates with access to the crossflow duct 24 or 24', respectively direct this less hot water into the cross-flow channel 24 or 24 '.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Incineration Of Waste (AREA)
  • Chimneys And Flues (AREA)
  • Baking, Grill, Roasting (AREA)
  • Gas Separation By Absorption (AREA)
  • Treating Waste Gases (AREA)
  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)

Abstract

The gas heating boiler combustion chamber (5) has a peripheral wall (6) from which parallel and vertical hot gas draught pockets (7) lead to a lower exhaust gas collection chamber (8) in the bottom of the housing (1) with exhaust gas draught connections (9). Flow guides (10) are arranged at least in the upper area of the hot gas draught pockets and at a distance to the peripheral wall of the combustion chamber. The flow guides bring together the heat carrier medium flowing out between the hot gas draught pockets and direct it against a part area of the peripheral wall.

Description

Die Erfindung betrifft einen Gasheizkessel, bestehend aus einem wasserführenden Gehäuse mit oberem Vor- und unterem Rücklaufanschluß und mit im Gehäuseoberteil angeordneter, mit Flächenbrenner bestückter Brennkammer, von deren Umfangswand aus zueinander im wesentlichen parallel und vertikal angeordnete Heizgaszugtaschen zu einer unten am Gehäuse angeordneten Abgassammeikammer mit Abgasabzuganschluß führen, wobei im oberen Bereich der Heizgaszugtaschen und in Distanz zur Umfangswand der Brennkammer zwischen den Heizgaszugtaschen das zwischen diesen ausströmende Wärmeträgermedium bündelnde und gegen einen Teilbereich der Umfangswand richtende Strömungsführungen angeordnet sind.The invention relates to a gas boiler consisting of a water-bearing housing with upper front and lower Return connection and with arranged in the upper part of the housing combustion chamber equipped with surface burner, of whose Circumferential wall made substantially parallel to each other and vertically arranged heating gas pockets to one at the bottom Exhaust gas collection chamber arranged with exhaust gas connection lead, in the upper area of the heating gas pockets and at a distance from the peripheral wall of the combustion chamber between the heating gas pockets the one between them outflowing heat transfer medium bundling and against one Partial area of the peripheral wall directing flow guides are arranged.

Ein Heizkessel dieser Art ist bspw. nach der EP-A-0 271 434 bekannt, bei dem allerdings das Taschenpaket nicht an der Umfangswand der Brennkammer sondern an deren Boden angesetzt ist und bei dem über die ganze Höhe des Taschenpaketes mehrere horizontale Zwischenwände eingesetzt sind, um den Aufströmraum in den Taschenzwischenräumen für den Rücklauf zu gliedern und dabei in der letzten Etage für ein gezieltes Anströmen des Brennkammerbodens zu sorgen.
Bekannt ist auch ein Gasheizkessel einschlägiger Art bspw. nach der DE-A-43 01 804, deren topfartige Brennkammern, die mit ihrer Achse allerdings horizontal orientiert sind, mit halbkugelförmigen Gasflächenbrennern bestückt werden, führen zu einer äußerst kompakten Bauweise des ganzen Brennkammerbereiches und insofern auch des gesamten Gasheizkessels, was jedoch mit einer hohen Wärmebelastung der Brennkammerwände verbunden ist, und zwar insbesondere im Bereich der Anschlüsse der nach unten abgehenden Heizgaszugtaschen, deren Anschlußöffnungsquerschnitte die in diesem Bereich kühlbare Fläche der Brennkammerumfangswand entsprechend reduzieren. Durch diese Reduzierung der kühlbaren Brennkammerfläche gleichzeitig in Verbindung mit einer hohen Wärmebelastung und trotz der in der Regel in diesem Bereich zylindrischen Umfangswand der Brennkammer, die an sich ein Abfließen und Auflösen von Siedeblasen erwarten läßt, hat sich gezeigt, daß Siedegeräusche an derartigen Gasheizkesseln, die ansonsten an Leistung und kompakter Bauweise nichts zu wünschen übrig lassen, aufgrund der hohen Wärmebelastung nicht zu vermeiden sind.
A boiler of this type is known, for example, according to EP-A-0 271 434, in which, however, the pocket packet is not attached to the peripheral wall of the combustion chamber but to the bottom thereof, and in which several horizontal partition walls are used over the entire height of the pocket packet, in order to structure the upflow space in the pockets between the pockets for the return and to ensure a targeted flow against the combustion chamber floor on the last floor.
A gas boiler of the relevant type is also known, for example according to DE-A-43 01 804, whose pot-like combustion chambers, which, however, are oriented horizontally with their axes, are equipped with hemispherical gas surface burners, lead to an extremely compact design of the entire combustion chamber area and, in this respect, as well of the entire gas boiler, which, however, is associated with a high thermal load on the combustion chamber walls, in particular in the area of the connections of the downward heating gas draft pockets, the connection opening cross sections of which reduce the area of the combustion chamber peripheral wall which can be cooled in this area accordingly. Through this reduction of the coolable combustion chamber area at the same time in connection with a high heat load and despite the generally cylindrical peripheral wall of the combustion chamber in this area, which can be expected to drain and dissolve boiling bubbles, it has been shown that boiling noises on such gas boilers, the otherwise leave nothing to be desired in terms of performance and compact design, which cannot be avoided due to the high thermal load.

Der Erfindung liegt demgemäß die Aufgabe zugrunde, Gasheizkessel der gattungsgemäßen Art mit einfachen Mitteln dahingehend zu verbessern, daß die mit hoher Dichte im Anschlußbereich der Heizgaszugtaschen an die Brennkammerumfangswand übertragene Wärme auf der Wasserseite abgeführt wird und Siedegeräusche unterbunden werden, verbunden mit der Maßgabe, von vornherein für eine möglichst gleichmäßige Zuführung des Rücklaufes in alle Taschenzwischenräume zu sorgen, die bei Anordnung eines einfachen Rücklaufanschlusses in herkömmlicherweise am wasserführenden Gehäuse des Heizkessels nicht gegeben ist.The invention is therefore based on the object, gas boiler of the generic type with simple means to improve in that the high density in Connection area of the heating gas draw pockets to the peripheral wall of the combustion chamber transferred heat on the water side is dissipated and boiling noises are prevented, connected with the stipulation, from the outset for one as even as possible supply of the return in all To provide pocket gaps that when arranging a simple return connection in conventionally am water-bearing housing of the boiler is not given is.

Diese Aufgabe ist an einem Gasheizkessel der eingangs genannten Art nach der Erfindung durch die im Kennzeichen des Patentanspruches 1 angeführten Merkmale gelöst.This task is the beginning of a gas boiler mentioned type according to the invention by the in the mark of claim 1 listed features solved.

Durch diese erfindungsgemäße Ausbildung wird das in das Gehäuse des Gasheizkessels unten eingeführte Rücklaufwasser nicht einfach sich selbst überlassen, um nach oben, die Heizgaszugtaschen und die Brennkammer umspülend, zum Heizkesselvorlauf zu strömen, sondern es erfolgt gezielt und unter Beschleunigung eines zentralen Kernes des auf strömenden Wärmeträgermediums eine Beaufschlagung der hochbelasteten Umfangswandteile der Brennkammer zwischen den Heizgaszugtaschen, an welchen Wandteilen entlang und entsprechend beschleunigt das Wärmeträgermedium, diese Wandteite entsprechend intensiv kühlend, nach oben um die Brennkammer herum zum Vorlaufanschluß abströmt. Dabei ist aber erfindungsgemäß von vornherein durch die spezielle Anordnung und Ausbildung des Rücklaufes dafür gesorgt, daß der zuströmende Rücklauf gleichmäßig in die Taschenzwischenräume einströmt.Through this training according to the invention that is in the Casing of the gas boiler return water introduced below don't just leave yourself to look after above, washing the hot gas pockets and the combustion chamber, to flow to the boiler flow, but it takes place in a targeted manner and with the acceleration of a central one Core of the flowing on the heat transfer medium an application the highly stressed peripheral wall parts of the combustion chamber between the heating gas pockets, on which wall parts along and accordingly accelerates the heat transfer medium, correspondingly intensely cooling this wall part, up around the combustion chamber to the flow connection flows out. But according to the invention through the special arrangement and training of the return line ensured that the inflowing return line flows evenly into the pockets.

Vorteilhafte Weiterbildungen ergeben sich nach den Unteransprüchen, mit deren Merkmalen dafür gesorgt ist, daß eine optimale Weiterleitung des gleichmäßig in die Taschenzwischenräume verteilten Rücklaufes nach oben erfolgt.Advantageous further developments result from the Subclaims, the characteristics of which ensure that an optimal forwarding of the evenly into the Interstices between pockets of distributed return flow upwards he follows.

Eine Intensivierung der Kühlung hochbeaufschlagter Brennkammerflächen mit davon abgehenden Heizgaszugtaschen ist zwar nach dem DE-U-93 18 680 bekannt, hierbei handelt es sich jedoch um einen Gasheizkessei von insofern anderer Art, als es sich bei diesem Gasheizkessel um einen solchen handelt, bei dem Brennkammer und Heizgaszugtaschen im wesentlichen horizontal hintereinander angeordnet sind, d.h., die Heizgaszugtaschen gehen vom Brennkammerboden aus, bzw. die Zwischenbereiche zwischen den Taschenöffnungen bilden den Brennkammerboden. Die Intensivierung der Kühlung dieses Bereiches erfolgt hierbei durch Direktanordnung des Rücklaufs in Form eines Rohres oder einer Art Düse unter diesem Bereich, der im übrigen insofern nicht so kritisch anzusehen ist, da hierbei, im Gegensatz zum vorliegenden Kessel, die hoch beaufschlagten Wandteile im wesentlichen vertikal orientiert sind. Für den erfindungsgemäßen Gasheizkessel wäre eine Intensivierung der Wärmeabfuhr durch solche Ausbildungen und Anordnungen denkbar ungeeignet, da am unteren, kritischen Bereich der Brennkammerumfangswand, an den sich die Heizgaszugtaschen nach unten anschließen, Zusatzmaßnahmen getroffen werden müßten, um auch dem unteren Bereich der Heizgaszugtaschen Rücklaufwasser zuführen zu können.An intensification of the cooling of highly loaded combustion chamber surfaces with outgoing hot gas pockets Although known from DE-U-93 18 680, this is what it is about However, it is a gas heating boiler from another Kind of like this gas boiler such acts in the combustion chamber and Heizgaszugtaschen arranged essentially horizontally one behind the other are, i.e. the heating gas pockets start from Combustion chamber floor, or the intermediate areas between the pocket openings form the combustion chamber floor. The The cooling of this area is intensified here by direct arrangement of the return in the form of a Tube or a kind of nozzle under this area, which in the the rest is not to be viewed so critically as here, in contrast to the present boiler, the high acted on wall parts substantially vertically are oriented. For the gas boiler according to the invention would be an intensification of heat dissipation by such Training and arrangements are unsuitable because on lower, critical area of the combustion chamber peripheral wall, to which the heating gas pockets are connected at the bottom, Additional measures would have to be taken to ensure that Feed the return water to the lower area of the hot gas draw pockets to be able to.

Da sich die noch näher zu erläuternde Ausführungsform gemäß Anspruch 6 dank ihrer speziellen Strömungsführung als am wirksamsten erwiesen hat, wird diese Ausführungsform bevorzugt.Since the embodiment to be explained in more detail according to claim 6 thanks to their special flow guidance has been found to be the most effective, this embodiment prefers.

Der erfindungsgemäße Gasheizkessel, weitere Ausführungsformen und vorteilhafte Gestaltungsmöglichkeiten bezüglich der Strömungsführungen werden nachfolgend anhand der zeichnerischen Darstellung von Ausführungsbeispielen näher erläutert.The gas boiler according to the invention, further embodiments and advantageous design options regarding the flow guides are based on the graphic representation of exemplary embodiments explained in more detail.

Es zeigt schematisch

Fig. 1
den Gasheizkessel in Vorderansicht;
Fig. 2
den Gasheizkessel gemäß Fig. 1 in Seitenansicht;
Fig. 3
den Gasheizkessel gemäß Fig. 1 in Draufsicht;
Fig. 4,5
in Vorderansicht zwei weitere Ausführungsformen des Gasheizkessels;
Fig. 6-11
verschiedene Ausführungsformen von Strömungsführungen im Schnitt und in Anordnung zwischen den Taschen;
Fig. 12
perspektivisch eine der Strömungsführungen in besonderer Ausführungsform;
Fig. 13
den Gasheizkessel in Vorderansicht ähnlich wie in Fig. 1 aber in anderer Ausführungsform;
Fig. 14
den Gasheizkessel gemäß Fig. 13 in Seitenansicht;
Fig. 15
perspektivisch die Strömungsleitbleche in besonderer Ausführungsform und
Fig. 16A,B
im Schnitt weitere besondere Ausführungsformen.
It shows schematically
Fig. 1
the gas boiler in front view;
Fig. 2
the gas boiler of Figure 1 in side view.
Fig. 3
the gas boiler according to Figure 1 in plan view.
Fig. 4.5
in front view two further embodiments of the gas boiler;
Fig. 6-11
different embodiments of flow guides in section and in arrangement between the pockets;
Fig. 12
perspective one of the flow guides in a special embodiment;
Fig. 13
the gas boiler in front view similar to Figure 1 but in another embodiment.
Fig. 14
the gas boiler according to Figure 13 in side view.
Fig. 15
perspective the flow baffles in a special embodiment and
16A, B
on average other special embodiments.

Wie aus Fig. 1 bis 3 ersichtlich, besteht der Gasheizkessel aus einem wasserführenden Gehäuse 1 mit oberem Vorlaufanschluß 2 und unterem Rücklaufanschluß 3 und mit im Gehäuseoberteil l' angeordneter, mit Flächenbrenner 4 bestückter Brennkammer 5, von deren Umfangswand 6 aus zueinander im wesentlichen parallel und vertikal angeordnete Heizgaszugtaschen 7 zu einer unten am Gehäuse 1 angeordneten Abgassammelkammer 8 mit Abgasabzuganschluß 9 führen. Dabei sind im oberen Bereich der Heizgaszugtaschen 7 und in Distanz zur Umfangswand 6 der Brennkammer 5 zwischen den Heizgaszugtaschen 7 das zwischen diesen ausströmende Wärmeträgermedium bündelnde und gegen einen Teilbereich der Umfangswand 6 richtende Strömungsführungen 10 angeordnet.As can be seen from Fig. 1 to 3, there is the gas boiler from a water-bearing housing 1 with an upper Flow connection 2 and lower return connection 3 and with arranged in the upper housing part 1 ', with surface burner 4 equipped combustion chamber 5, from its peripheral wall 6 essentially parallel and vertical to each other arranged Heizgaszugtaschen 7 to one at the bottom of the housing 1 arranged exhaust gas collection chamber 8 with exhaust gas connection 9 lead. There are hot gas pockets in the upper area 7 and at a distance from the peripheral wall 6 of Combustion chamber 5 between the heating gas pockets 7 that between these flowing out heat transfer medium and directed against a portion of the peripheral wall 6 Flow guides 10 arranged.

Für einen solchen Gasheizkessel ist nun wesentlich, daß der Rücklaufanschluß 3 in Form eines seitlich neben dem Taschenpaket P in das Gehäuse 1 einragenden Rohres 3' ausgebildet und dieses mit in die Taschenzwischenräume 7' gerichteten Ausströmöffnungen 11 versehen ist.For such a gas boiler it is essential that the return port 3 in the form of a side next to the Pocket package P in the housing 1 projecting tube 3 ' trained and this with in the pocket spaces 7 ' directed outflow openings 11 is provided.

Dargestellt ist in Fig.1 eine Ausführungsform, bei der die trichterförmig angeordneten Strömungsführungen 10 als Teile oder Anschlußteile von die beiden offenen Seiten S des Taschenpaketes P verblendenden Wänden 14 ausgebildet sind, wobei der eine Teil der Wände 14 als Strömungsfang 14' über dem Rücklaufanschluß 3 angeordnet ist. Die dadurch gebündelte, gezielt zu den Ausströmöffnungen A geführte, dort beschleunigte und gegen den mittigen Bereich der Brennkammerumfangswand 6 gerichtete Strömung des Wärmeträgermediums ist mit Pfeilen angedeutet, die auch verdeutlichen, daß der ganze hochbelastete untere Bereich der Umfangswand 6 von der Mitte aus nach beiden Seiten intensiv bespült und damit gekühlt wird, was in diesem Maße nicht gewährleistet wäre, wenn das gesamte, durch den Rücklaufanschluß 3 zuströmende Rücklaufwasser, wie bisher üblich, sich selbst überlassen bliebe und über den ganzen Querschnitt des wasserführenden und nur gestrichelt angedeuteten Gehäuses 1 nach oben strömen könnte.1 shows an embodiment in which the funnel-shaped flow guides 10 as Parts or connecting parts from the two open sides S of the pocket packet P veneered walls 14 are, with a part of the walls 14 as a flow trap 14 'is arranged above the return port 3. The thereby bundled, specifically to the outflow openings A guided, accelerated there and against the middle Area of the combustion chamber peripheral wall 6 directed flow of the heat transfer medium is indicated by arrows that also clarify that the whole heavily loaded lower Area of the peripheral wall 6 from the center to both Sides are rinsed intensively and thus cooled what is in this degree would not be guaranteed if the entire, return water flowing in through the return connection 3, as usual, left to itself and over the whole cross section of the aquifer and only Flow dashed housing 1 upwards could.

Die Größe der Ausströmöffnungen A, die Neigung der Strömungsführungen 10 und die Distanz der Ausströmöffnungen A zur Umfangswand 6 können je nach den speziellen Bedingungen am jeweiligen Gasheizkessel, insbesondere mit Rücksicht auf erwartbare maximale Wärmebelastungen variieren.The size of the outflow openings A, the inclination of the Flow guides 10 and the distance of the outflow openings A to the peripheral wall 6 can depend on the special conditions on the respective gas boiler, especially with regard to the expected maximum Thermal loads vary.

Die beschleunigende und gezielte Heranführung eines Teiles des zugeführten Rücklaufes kann auch auf andere Weise erreicht werden. Bei der Ausführungsform nach Fig.4 sind die Strömungsführungen 10 in Form von einem in bezug auf die Breite B der Heizgaszugtaschen 7 schmaleren Aufströmschacht 12 begrenzenden Wände 13 zwischen den Heizgaszugtaschen 7 angeordnet, wobei der eine Teil der Wände 13 als Strömungsfang 13' über dem Rücklaufanschluß 3 angeordnet ist, und bei der Ausführungsform nach Fig.5 sind von den die Strömungsführungen 10 bildenden Wänden W die rücklaufseitigen Wände 1o' in die Taschenzwischenräume 7', wie dargestellt, abgewinkelt und begrenzen mit den anderen Wänden 10" auf der rücklauffernen Seite die gegen die Umfangswand 6 der Brennkammer 5 gerichteten Ausströmöffnungen A, d.h., hierbei erfolgt eine Anströmung der Umfangswandteile von der Seite her. Auch bei diesen Ausführungsformen sind die sich einstellenden Strömungen mit Pfeilen angedeutet.The accelerating and targeted introduction of a Part of the return can also be supplied to others Way to be achieved. In the embodiment according to Fig.4 are the flow guides 10 in the form of one in relation to the width B of the heating gas pockets 7 narrower Upflow shaft 12 bounding walls 13 between the Heizgaszugtaschen 7 arranged, one part of the Walls 13 as a flow trap 13 'over the return port 3 is arranged, and in the embodiment of Figure 5 are of the walls W forming the flow guides 10 the return-side walls 1o 'in the pocket spaces 7 ', as shown, angled and delimit with the other walls 10 "on the return side those directed against the peripheral wall 6 of the combustion chamber 5 Outflow openings A, i.e. there is an inflow the peripheral wall parts from the side. Also at these embodiments are the ones that arise Currents indicated by arrows.

Wie bereits erwähnt, ist vorteilhaft die Anordnung des Rücklaufanschlusses 3 am Gehäuse 1 bzw. dessen Zuordnung zu den Strömungsführungen 10 bzw. zu den diese nach unten verlängernden Wänden W bzw. 14 so getroffen, daß der wesentliche Teil des Rücklaufes direkt zu den Strömungsführungen 10 gelangt.As already mentioned, the arrangement of the Return port 3 on the housing 1 and its assignment to the flow guides 10 or to the bottom extending walls W or 14 hit so that the essential part of the return flow directly to the flow guides 10 arrives.

Um auch vom Rücklauf her schon eine weitgehend gleichmäßige Zuführung des relativ kalten Rücklaulwassers in die Taschenzwischenräume 7' zu erreichen, ist im Inneren des Gehäuses 1 der Rücklaufanschluß 3 durch ein Rohr 3' verlängert, das mit in die Taschenzwischenräume 7' gerichteten Ausströmöffnungen 11 versehen ist (siehe auch Fig.3).To a large extent also from the return even supply of the relatively cold return water to reach into the pockets 7 'is in Inside the housing 1 of the return port 3 by a Tube 3 'extended that into the pocket spaces 7 'directed outflow openings 11 is provided (see also Fig. 3).

Für die Gestaltung der Strömungsführungen 10 bzw. der Wände W bzw. 14 sind verschiedene Ausführungsformen möglich, die im einzelnen in den Fig.6 bis 11 dargestellt sind. Hiernach sind gemäß Fig.6 aber auch Fig.10 die Strömungsführungen 10 in Form von auf der einen und/oder anderen Seitenflanke F der Heizgaszugtaschen 7 angeordneten Blechstreifen 15 ausgebildet. Die Blechstreifen 15 sind an den Flanken F der Heizgaszugtaschen angeheftet, angelötet oder angeschweißt. Gemäß Fig.10 erfolgt dies auf beiden benachbarten Flanken zweier Heizgaszugtaschen, und zwar etwas versetzt zueinander, so daß eine Art Labyrinth als Strömungsführung 10 entsteht. Gemäß Fig.7 kann auch auf einen Blechstreifen 15 ein Dichtungsprofil 15' aufgesetzt werden, oder es kann als Strömungsführung 10 auch nur ein Profil 16 (nur schematisch in Fig.8 angedeutet) aus Kunststoff zwischen zwei Taschen vorgesehen werden, das mit geeigneten Mitteln in Position gehalten wird. Wie in Fig.9 dargestellt, ist es aber auch möglich, die Strömungsführungen 10 in Form von in sich federnden Blechprofilen 17 auszubilden und diese mit ihren Rändern R in Führungsprägungen 18 der Seitenflanken F der Heizgaszugtaschen 7 einzusetzen. Wie aus Fig.9 erkennbar und ohne weiteres vorstellbar, entsteht dadurch ein regelrechter Führungskanal in jedem der Taschenzwischenräume.For the design of the flow guides 10 and Walls 14 and 14 are different embodiments possible, which is shown in detail in Figures 6 to 11 are. According to FIG. 6 but also FIG Flow guides 10 in the form of one and / or other side flank F of the Heizgaszugtaschen 7 arranged Sheet metal strip 15 formed. The metal strips 15 are attached to the flanks F of the hot gas pockets, soldered or welded on. This is done according to FIG on both adjacent flanks of two hot gas pockets, and somewhat offset from each other, so that a kind Labyrinth as flow guide 10 arises. According to Fig. 7 can also a sealing profile on a sheet metal strip 15 15 'can be placed, or it can be used as a flow guide 10 also only one profile 16 (only schematically in FIG. 8 indicated) provided between two pockets made of plastic be in position with suitable means is held. As shown in Fig.9, it is also possible, the flow guides 10 in the form of itself Form resilient sheet metal profiles 17 and this with their edges R in guide embossments 18 of the side flanks F of the heating gas pockets 7. As from Fig. 9 recognizable and easily imaginable, this creates a real guide channel in each of the pockets.

Da die Flankenwände F der Heizgaszugtaschen 7 sowieso aus Gründen der Strömungsführung auf der Gasseite und aus Stabilitätsgründen, wie bspw. dargestellt, geprägt werden, ist es vorteilhaft auch möglich, die Strömungsführungen 10 in Form von in die Zwischenräume 7' der Heizgaszugtaschen 7 weisenden Stegausprägungen 19 auszubilden, wie dies in Fig.11 dargestellt ist.Since the flank walls F of the Heizgaszugtaschen 7 anyway Reasons of flow guidance on the gas side and off Reasons of stability, such as depicted, are shaped, it is advantageously also possible for the flow guides 10 in the form of in the spaces 7 'of To form heating gas draw pockets 7-pointing web designs 19, as shown in Fig.11.

Fig.12 verdeutlicht schließlich eine Ausführungsform der Strömungsführung in Form eines Blechkammes, dessen "Zinken" 20 in die Taschenzwischenräume 7' eingreifen, wobei dieser Kamm bzw. die beiden Kämme jeweils an die zugehörige Wand 14 bspw. angepunktet ist oder mit dieser einen Teil bildet.Fig. 12 finally illustrates an embodiment of the Flow guidance in the form of a sheet metal comb, the Engage "tines" 20 in the pocket spaces 7 ', this comb or the two combs each to the associated wall 14 is dotted or with this forms part.

Für die Strömungsführungen 10 werden solche bevorzugt, die in sich elastisch sind bzw. mindestens einen elastischen Kontakt zur jeweils benachbarten Taschenwand haben (siehe bspw. Fig. 7,9), da damit erwartbaren Bewegungen der Taschenwandungen bei wechselnden Temperaturen am besten Rechnung zu tragen ist. For the flow guides 10 such are preferred which are elastic in themselves or at least one elastic contact to the adjacent pocket wall have (see, for example, Fig. 7,9), since this is expected Movement of the pocket walls at changing temperatures is best to take into account.

Die Ausführungsform nach den Fig.13 bis 16 unterscheiden sich von den vorbeschriebenen insofern, als hierbei ein Abfangen des aufströmenden Wassers durch ein unteres Strömungsleitblech erfolgt, durch ein zweites Strömungsleitblech eine Querströmung bewirkt wird und dann erst eine weitere Querströmung längs des unteren Bereiches der Brennkammerumfangswand 6 und dies mit zunehmender Erhöhung der Strömungsgeschwindigkeit. Diese Ausführungsform hat sich als am wirksamsten erwiesen, weshalb diese auch bevorzugt wird.Differentiate the embodiment according to FIGS. 13 to 16 differ from the ones described above in so far as Catching the inflowing water through a lower one Flow baffle takes place through a second flow baffle a cross flow is effected and only then a further cross flow along the bottom of the Combustion chamber peripheral wall 6 and this with increasing Increase in flow velocity. This embodiment has proven to be the most effective, which is why this is also preferred.

Für diese Ausführungsform ist gemäß Fig. 13,14 wesentlich, daß im oberen Bereich der Heizgaszugtaschen 7 und in Distanz zur Umfangswand 6 der Brennkammer 5 zwischen den Heizgaszugtaschen 7 und distanziert zueinander jeweils zwei entgegengesetzt gerichtete und zur Umfangswand 6 im wesentlichen die Strömungsführungen 10 bildenden parallelen Strömungsleitbleche 21,21' angeordnet sind, die mit Seitenbegrenzungsblechen 22 des jeweils anderen Strömungsleitbleches 21,21' an gegenüberliegenden Rändern der Heizgaszugtaschen 7 befindliche Überströmöffnungen 23 zu von den Strömungsleitblechen 21,21' begrenzten Querstromkanälen 24,24' begrenzen, wobei der sich längs der Umfangswand 6 der Brennkammer 5 erstreckende Querstromkanal mit einem kleineren Querschnitt bemessen ist als der darunter befindliche Querstromkanal. Gestrichelt dargestellt ist in Fig.13 auch die bezüglich einer günstigeren Strömungsführung vorteilhafte Ausführungsform, bei der in den von den Strömungsleitblechen 21,21, und den Seitenbegrenzungsblechen 22 begrenzten Zwickeln 25 entgegengesetzt gewölbte Leitbleche 26 angeordnet und die darüber befindlichen Bereiche 27 der Strömungsleitbleche 21,21' und/oder die Seitenbegrenzungsbleche 22 mit einer Lochung 28 versehen sind.According to FIGS. 13, 14, it is essential for this embodiment that that in the upper area of the Heizgaszugtaschen 7 and at a distance from the peripheral wall 6 of the combustion chamber 5 between the Heizgaszugtaschen 7 and spaced from each other two each opposing and to Circumferential wall 6 essentially the flow guides 10 parallel flow guide plates 21, 21 'are arranged are with the side plates 22 of the each other flow baffle 21,21 'on opposite Edges of the heating gas pockets 7 located Overflow openings 23 to the flow baffles 21, 21 'limit limited cross-flow channels 24, 24', the along the peripheral wall 6 of the combustion chamber 5th extending cross-flow channel with a smaller cross section is dimensioned as the one below Cross-flow channel. Dashed is shown in Fig. 13 also with regard to a more favorable flow guidance advantageous embodiment, in which in the Flow baffles 21,21, and the side restriction plates 22 limited gussets 25 opposite Arched baffles 26 arranged and the above areas 27 of the flow guide plates 21, 21 ' and / or the side boundary plates 22 with a perforation 28 are provided.

Wie ebenfalls in Fig. 13 strichpunktiert angedeutet, können mit dem gleichen Effekt die Strömungsleitbleche 21,21', von den Seitenbegrenzungsblechen 22 ausgehend, in ihren Ansatzbereichen ansteigend gewölbt ausgebildet sein.As also indicated by dash-dotted lines in FIG. 13, can the flow baffles with the same effect 21,21 ', starting from the side boundary plates 22, in their neck areas increasingly arched his.

Um die Kühlung des kritischen Bereiches der Brennkammerumfangswand 6 zu vergleichmäßigen, besteht eine weitere vorteilhafte Ausgestaltung darin, daß die Überströmöffnungen 23 in den Taschenzwischenräumen 7' abwechselnd auf der jeweils anderen Seite angeordnet sind, was in Fig.15 verdeutlicht ist. Im übrigen sei darauf hingewiesen, daß solche Strömungsleitbleche 21,21' auch jeweils zwischen den jeweils äußeren Taschen und den dazu jeweils benachbarten Gehäusefront- und -rückwänden F',F" angeordnet werden können, wie dies in Fig.14 gestrichelt angedeutet ist.To cool the critical area of the combustion chamber peripheral wall 6, there is another advantageous embodiment in that the overflow openings 23 alternately in the pocket spaces 7 ' are arranged on the other side, what in Fig. 15 is clarified. For the rest, it should be noted that such flow baffles 21,21 'too between the respective outer pockets and the corresponding adjacent housing front and rear walls F ', F " can be arranged as dashed in Fig. 14 is indicated.

Eine Besonderheit ist in den Fig. 16A,B dargestellt. Hierbei wird ein Teil des relativ kalten Rücklaufwassers abgezweigt und direkt dem unteren Querstromkanal 24 zugeführt, wofür separate Rücklaufleitungen 3' im (Fig.16A) oder am (Fig.16B) Gehäuse 1 vorgesehen sind, die zuströmseitig einen Teil aus der Rücklaufströmung gewissermaßen ausschneiden und dem heißen Wasser im Querstromkanal 24 zumischen und dessen Temperatur etwas absenken. Sofern ein solcher Heizkessel in Brennwertbetriebsweise gefahren wird, geht dies allerdings etwas auf Kosten der Brennwertnutzung.
Da in den Seitenbereichen 29 des Gehäuses 1, also außerhalb der Taschenzwischenräume 7', das Wasser nicht so stark aufgeheizt wird wie in diesen, können bspw. auch kleine Fangbleche 30 an den Seitenblechen mit Zugang zum Querstromkanal 24 bzw. 24' angeordnet werden, die dieses weniger heiße Wasser in den Querstromkanal 24 bzw. 24' einlenken.
A special feature is shown in FIGS. 16A, B. Here, part of the relatively cold return water is branched off and fed directly to the lower cross-flow channel 24, for which purpose separate return lines 3 'are provided in (Fig. 16A) or on (Fig. 16B) housing 1, which cut out part of the return flow to a certain extent and Mix in the hot water in the cross-flow duct 24 and lower its temperature somewhat. If such a boiler is operated in the condensing mode, this is somewhat at the expense of the use of the condensing boiler.
Since in the side areas 29 of the housing 1, i.e. outside the pocket interstices 7 ', the water is not heated as strongly as in these, for example, small catch plates 30 can also be arranged on the side plates with access to the crossflow duct 24 or 24', respectively direct this less hot water into the cross-flow channel 24 or 24 '.

Claims (12)

  1. A gas boiler comprising a water-carrying casing (1) including upper forward and lower return flow connections (2,3) and a combustion chamber (5) arranged in the upper casing part (1') and provided with surface burners (4), with flue pockets (7) for the heating gas arranged substantially in parallel and in the vertical direction leading from the circumferential wall (6) of the combustion chamber (5) to an exhaust gas collecting chamber (8) including a gas discharge connection (9) located at the bottom of casing (1), with flow guiding means (10) being provided in the upper part of the gas flue pockets (7) in spaced relationship to the circumferential wall (6) of the combustion chamber (5) between pockets (7) and bunching the heat carrier medium flowing upwardly between said pockets and directing the same against a partial area of the circumferential wall (6),
    characterized in
    that the return flow connection (3) is designed in the form of a tube (3') protruding laterally next to the pocket package (P) into casing (1), with the said tube (3') being provided with flow-off ports (11) directed toward the pocket intervals (7').
  2. A gas boiler according to claim 1,
    characterized in
    that the flow guiding means (10) are arranged in a hopper-type way, confining flow-off ports (A) directed against the central area of the circumferential wall (6) of combustion chamber (5).
  3. A gas boiler according to claims 1 or 2,
    characterized in
    that the flow-guiding means (10) in the form of walls confining a flow shaft (12) narrower than the width (B) of the pockets (7) are arranged between the flue pockets (7), with one part of the walls (13) being arranged as flow trap (13') above the return flow connection (3).
  4. A gas boiler according to any one of claims 1 or 2,
    characterized in that the flow guiding means (10) arranged in hopper-type manner are designed as parts or connecting portions of walls (14) facing the two open sides (S) of the pocket package (P), with one part of the walls (14) being arranged as flow trap (13') above the return flow stop (3).
  5. A gas boiler according to claims 1 or 2,
    characterized in
    that the walls (10') on the return-flow side project from the walls (W) forming the flow guiding means (10) into the pocket intervals (7'), confining by the other walls (10") on the side facing away from the return flow, flow-off ports (A) directed against the circumferential wall (6) of the combustion chamber (5).
  6. A gas boiler according to claim 1,
    characterized in
    that the flow guiding means (10) are designed in the form of respectively two flow baffle plates (21, 21') arranged in the upper area of the heating gas flue pockets (7) in spaced relationship and directed opposite with respect to one another and extending substantially in parallel to the circumferential wall (6), which baffle plates (21, 21') with side-confining plates (22) of the respectively other baffle plate (21,21') located on opposite edges of the heating gas flue pockets (7), confine overflow openings (23) to transverse flow passageways (24, 24') confined by baffle plates (21,21') with the transverse flow passageway (24') extending along the circumferential wall (6) of the combustion chamber (5) being of a cross-section smaller than the passageway (24) located therebelow.
  7. A gas boiler according to claim 6,
    characterized in that baffle plates (26) oppositely curved are arranged within spandrels (25) confined by the baffle plates (21, 21') and the side-confining plates (22), and the areas (27) of the baffle plates (21, 21') located thereabove and/or the side-confining plates (22) are provided with a perforation (28).
  8. A gas boiler according to claim 7,
    characterized in that the flow baffle plate (21, 21'), proceeding from the side-confining plates (22), in the mounting zones thereof are designed in the form of an ascending-curvature.
  9. A gas boiler according to any one of claims 6 to 8,
    characterized in
    that the overflow ports (23) in the pocket intervals (7') alternately are arranged on the respectively other side.
  10. A gas boiler according to any one of claims 6 to 9,
    characterized in
    that arranged in the water-carrying interior (29) or externally of the casing (1) are return flow conduits (3') leading to the bottom transverse flow passageway (24), terminating therein and proceeding from the return-flow connections (3).
  11. A gas boiler according to any one of claims 6 through 10,
    characterized in
    that arranged on the side-confining plates (22) are trap plates (30) bent into the side faces (29) of the casing (1), providing access at least to the transverse flow passageway (24).
  12. A gas boiler according to any one of claims 1 through 11,
    characterized in
    that the flow-guiding means (10) or the flow baffle plates (21, 21') are in the form of sheet metal strips (15) or profiles (16) of water- and heat-resistant plastic materia, of inherently resilient plate profiles (17), or of embossed webs (19) directed into the intervals (7') of the pockets (7), arranged on one and/or the other side flank (F) of the pockets (7).
EP95114855A 1994-10-06 1995-09-21 Gas boiler Expired - Lifetime EP0706016B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19944435745 DE4435745C1 (en) 1994-10-06 1994-10-06 Gas boiler for domestic water heating
DE4435745 1994-10-06
DE29503697U DE29503697U1 (en) 1995-03-04 1995-03-04 Gas boiler
DE29503697U 1995-03-04

Publications (2)

Publication Number Publication Date
EP0706016A1 EP0706016A1 (en) 1996-04-10
EP0706016B1 true EP0706016B1 (en) 2001-01-10

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Application Number Title Priority Date Filing Date
EP95114855A Expired - Lifetime EP0706016B1 (en) 1994-10-06 1995-09-21 Gas boiler

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DE (1) DE59508954D1 (en)

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Publication number Priority date Publication date Assignee Title
PL229301B1 (en) * 2015-09-28 2018-07-31 Aic Spolka Akcyjna Fired water heater
EP3336427B1 (en) * 2016-12-16 2019-07-03 Ikerlan, S. Coop. Gas burner

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2388647A (en) * 1944-10-07 1945-11-06 Howard G Sawyer Fire-tube boiler
FR2472725A1 (en) * 1979-12-27 1981-07-03 Barrault Rene Louis Water boiler heated by hot gases flowing through tubes - has water flowing over external surfaces of tubes and through annular channel formed by double boiler casing
DE3778660D1 (en) * 1986-12-06 1992-06-04 Vaillant Joh Gmbh & Co STEEL BOILER.
DE9318680U1 (en) 1993-12-07 1994-02-24 Viesmann Hans Dr Gas boiler

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