[go: up one dir, main page]

EP0915304A2 - Three-pass boiler - Google Patents

Three-pass boiler Download PDF

Info

Publication number
EP0915304A2
EP0915304A2 EP98120713A EP98120713A EP0915304A2 EP 0915304 A2 EP0915304 A2 EP 0915304A2 EP 98120713 A EP98120713 A EP 98120713A EP 98120713 A EP98120713 A EP 98120713A EP 0915304 A2 EP0915304 A2 EP 0915304A2
Authority
EP
European Patent Office
Prior art keywords
guide plate
return
housing
pass boiler
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.)
Granted
Application number
EP98120713A
Other languages
German (de)
French (fr)
Other versions
EP0915304A3 (en
EP0915304B1 (en
Inventor
Robert Hofmann
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 Generations Group GmbH and Co KG
Original Assignee
Viessmann Werke GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE29719718U external-priority patent/DE29719718U1/en
Priority claimed from DE29719719U external-priority patent/DE29719719U1/en
Application filed by Viessmann Werke GmbH and Co KG filed Critical Viessmann Werke GmbH and Co KG
Publication of EP0915304A2 publication Critical patent/EP0915304A2/en
Publication of EP0915304A3 publication Critical patent/EP0915304A3/en
Application granted granted Critical
Publication of EP0915304B1 publication Critical patent/EP0915304B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • F24H1/285Water 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 alongside 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
    • F24H9/0036Dispositions against condensation of combustion products

Definitions

  • the invention relates to a three-pass boiler according to the preamble of claim 1.
  • Such three-pass boilers are generally known and in Use, so there is no special in this regard Written evidence is required.
  • This serves on the burner side arranged in the water-carrying part of the housing and the second and third train shielding baffle to that flowing back from the return connection into the boiler housing, relatively cold water outside around these two Guide trains around and shield them against the return.
  • the exhaust gas temperatures are still high in both trains enough to have a condensation or Condensation to exclude.
  • the return water is therefore from the baffle first in the burner-side area of the first train, i.e. led to the combustion chamber and heated there. After that the return water flows into the exhaust gas area of the second and third train, in which the heating gases are already have cooled, so that there is the risk of condensation and so there is corrosion.
  • the invention is based on the object on three-pass boilers of the type mentioned in the introduction formation of condensate, especially in the third heating gas flue, specifically here in the part that is located deepest in the boiler housing, on simple Way to rule out as far as possible.
  • an advantageous further development consists in that the openings in the baffle in the form of slots are trained, since this is the easiest way to cover the entire width of the baffle is to be recorded.
  • the outflow openings are also advantageous with this solution provided with so-called guide plates, which, oriented and inclined downwards from the baffle and the housing wall protrude limited return gap.
  • This Design of the outflow openings with guide plates as a result that flowing past the guide plates, relatively cold return water, which is usually under the Pressure of a circulating pump fed into the boiler housing a suction on the much hotter boiler water exercises under the baffle and this injector-like sucks out the inner boiler area.
  • These guide plates are easiest and most convenient by form-matching Punching on the baffle and deflection gained.
  • the three-pass boiler according to the invention is as follows based on the graphic representation of exemplary embodiments explained in more detail.
  • the three-pass boiler according to Fig.1, as before already, from a water-bearing housing 4 with a front and Return connections 5,6, in which a burner equipped with 1 '' Combustion chamber 1 'as the first train 1, based on the combustion chamber 1 'can be flowed through in the opposite direction Train 2 and one consisting of several heating gas pipes 3 ' and flowable in the same direction as the combustion chamber 1 ' third train 3 are arranged, the second and third train 2, 3 in the area of the burner 1 ′′ from, as shown, form-fitting curved guide plate 7 shielded are, whose apex line 7 'is located centrally under the return connection 6 extends.
  • Fig.1.2 essential that the baffle 7, based on the Medium perpendicular MS, in the middle area of its curved Legs 7 '' arranged over their width B distributed Openings 9 is provided.
  • FIGS. 5, 6, the two different ones Embodiments of guide plates 7 show.
  • the guide plate 7 according to FIG. 5 has on both edges against the housing wall, not shown in these Fig. 5,6 W bent webs 7 ', while the other, in Fig.6 shown guide plate 7 to the boundary wall 12 of the overflow chamber 4 'has no such web 7' and with its undeformed edge R directly against the boundary wall 12 encountered.
  • the webs 7 'and the edge R are only used in the manufacture of housings by tack welding on the housing wall W or in the case of Fig. 6 fixed with respect to the edge R on the boundary wall 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cookers (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Saccharide Compounds (AREA)
  • Combustion Of Fluid Fuel (AREA)

Abstract

The triple-draft boiler has a guide plate (7) with legs (7) at both sides of the center vertical of the housing (4), at the center zone of the plate. The leg matches the shape of the housing, and has at least one row of space outflow openings (9) across the plate width (B). The outflow openings are slits with guide tabs (9'), angled downwards to extend into the back flow gap between the guide plate and the housing wall. At least one row of holes (8) is at the straight leg section (11) of the guide plate.

Description

Die Erfindung betrifft einen Dreizugheizkessel gemäß Oberbegriff des Patentanspruches 1.The invention relates to a three-pass boiler according to the preamble of claim 1.

Derartige Dreizugheizkessel sind allgemein bekannt und in Benutzung, so daß es diesbezüglich keines besonderen druckschriftlichen Nachweise bedarf. Dabei dient das brennerseitig im wasserführenden Teil des Gehäuses angeordnete und den zweiten und dritten Zug abschirmende Leitblech dazu, das vom Rücklaufanschluß ins Heizkesselgehäuse zurückströmende, relativ kalte Wasser außen um diese beiden Züge herumzuführen und diese gegen den Rücklauf abzuschirmen. Im brennerseitigen Bereich des zweiten und dritten Zuges sind die Abgastemperaturen in beiden Zügen noch hoch genug, um dort eine Schwitzwasser-bzw. Kondensatbildung auszuschließen. Das Rücklaufwasser wird also vom Leitblech zunächst in den brennerseitigen Bereich des ersten Zuges, d.h. der Brennkammer geführt und dort erwärmt. Danach strömt das Rücklaufwasser in den abgasseitigen Bereich des zweiten und dritten Zuges, in dem sich die Heizgase schon abgekühlt haben, so daß dort die Gefahr der Schwitzwasserbildung und damit der Korrosion besteht.Such three-pass boilers are generally known and in Use, so there is no special in this regard Written evidence is required. This serves on the burner side arranged in the water-carrying part of the housing and the second and third train shielding baffle to that flowing back from the return connection into the boiler housing, relatively cold water outside around these two Guide trains around and shield them against the return. In the burner area of the second and third At the same time, the exhaust gas temperatures are still high in both trains enough to have a condensation or Condensation to exclude. The return water is therefore from the baffle first in the burner-side area of the first train, i.e. led to the combustion chamber and heated there. After that the return water flows into the exhaust gas area of the second and third train, in which the heating gases are already have cooled, so that there is the risk of condensation and so there is corrosion.

Obgleich bereits durch die Verwendung des Leitbleches eine deutliche Reduzierung der Neigung zum "Schwitzen" erreichbar ist, ist diese immer noch nicht völlig auszuschließen, und der Erfindung liegt die Aufgabe zugrunde, an Dreizugheizkesseln der eingangs genannten Art die Gefahr von Kondensatbildung insbesondere im dritten Heizgaszug, und zwar hier wieder insbesondere in dem Teil, der am tiefsten im Kesselgehäuse angeordnet ist, auf einfache Weise weitestgehend auszuschließen.Although already by using the baffle significant reduction in the tendency to "sweat" achievable is still not completely excluded, and the invention is based on the object on three-pass boilers of the type mentioned in the introduction formation of condensate, especially in the third heating gas flue, specifically here in the part that is located deepest in the boiler housing, on simple Way to rule out as far as possible.

Diese Aufgabe ist an einem Dreizugheizkessel der eingangs genannten Art nach der Erfindung durch die im Kennzeichen des Patentanspruches 1 gelöst. This task is at the beginning of a three-pass boiler mentioned type according to the invention by the in the mark of claim 1 solved.

Durch die beidseitig im mittleren Bereich der Schenkel des der Form des Gehäuses angepaßt gebogenen Leitbleches angeordneten Öffnungen wird bewirkt, daß bereits erwärmtes Kesselwasser den unter dem Leitblech befindlichen Raum in ausreichender Menge verlassen kann, sich mit dem einströmenden Rücklaufwasser vermischt und damit das Rücklaufwasser in seiner Temperatur angehoben wird. Dies wiederum führt dazu, daß das in den abgasseitigen Bereich des dritten Zuges gelangende Kesselwasser wärmer ist und damit dort Kondensatniederschläge vermieden werden. Dieser Effekt wird noch an Hand von Thermographien näher erläutert.By the two sides in the middle of the leg of the the shape of the housing adapted curved baffle arranged Openings will cause that already warmed up Boiler water in the space under the baffle sufficient quantity can leave itself with the inflowing Return water mixed and thus the return water is raised in temperature. This in turn leads to that in the exhaust side area boiler water entering the third pass is warmer and so that condensation is avoided there. This The effect becomes closer with the help of thermographs explained.

Eine vorteilhafte Weiterbildung besteht diesbezüglich darin, daß die Öffnungen im Leitblech in Form von Schlitzen ausgebildet sind, da damit am einfachsten die ganze Breite des Leitbleches zu erfassen ist.In this regard, an advantageous further development consists in that the openings in the baffle in the form of slots are trained, since this is the easiest way to cover the entire width of the baffle is to be recorded.

Ebenfalls vorteilhaft sind bei dieser Losung die Ausströmöffnungen mit sogenannten Leitlaschen versehen, die, nach unten orientiert und geneigt, in den vom Leitblech und der Gehäusewand begrenzten Rücklaufspalt ragen. Diese Ausgestaltung der Ausströmoffnungen mit Leitlaschen hat zur Folge, daß das an den Leitlaschen vorbeiströmende, relativ kalte Rücklaufwasser, das in der Regel unter dem Druck einer Umwälzpumpe in das Kesselgehäuse eingefördert wird, einen Sog auf das wesentlich heißere Kesselwasser unter dem Leitblech ausübt und dieses injektorartig aus dem inneren Kesselbereich heraussaugt. Diese Leitlaschen werden am einfachsten und zweckmäßigsten durch formentsprechende Anstanzungen am Leitblech und Ausbiegung gewonnen.The outflow openings are also advantageous with this solution provided with so-called guide plates, which, oriented and inclined downwards from the baffle and the housing wall protrude limited return gap. This Design of the outflow openings with guide plates as a result, that flowing past the guide plates, relatively cold return water, which is usually under the Pressure of a circulating pump fed into the boiler housing a suction on the much hotter boiler water exercises under the baffle and this injector-like sucks out the inner boiler area. These guide plates are easiest and most convenient by form-matching Punching on the baffle and deflection gained.

Mit der gewissermaßen per Leitblech strikten Strömungsführung des Rücklaufes ist insofern ein gewisser Nachteil verbunden, als sich dabei der Rücklauf nicht kühlend auf die Begrenzungswand der Überströmkammer auswirken kann, in der die Rohrenden des zweiten und dritten Zuges eingeschweißt sind. Um diesen thermisch hochbelasteten Bereich trotzdem von der Wasserseite her einen Kühleffekt zu vermitteln und damit den erwähnten Nachteil wieder in etwa auszugleichen, ist vorteilhaft und denkbar einfach zu verwirklichen vorgesehen, das Leitblech dafür ebenfalls mit auszunutzen, was noch näher erläutert wird. Thermographische Beobachtungen haben gezeigt, daß damit eine Temperaturabsenkung des Kesselwassers in diesem auf der Wasserseite kritischen Bereich bis zu 10°C erreicht werden kann und den vorerwähnten Negativfolgen auf einfache Weise begegnet ist.With the flow guidance strictly by means of a baffle the return is therefore a certain disadvantage connected when the return flow does not cool down can affect the boundary wall of the overflow chamber in who welded the pipe ends of the second and third train are. Around this thermally highly stressed area nevertheless a cooling effect from the water side convey and thus roughly the disadvantage mentioned again balancing is advantageous and very easy to implement provided, the guide plate for this also with take advantage of what is explained in more detail. Thermographic observations have shown that a decrease in the temperature of the boiler water in this the water side reaches critical area up to 10 ° C can be and the aforementioned negative consequences in simple Way has met.

Der erfindungsgemäße Dreizugheizkessel wird nachfolgend anhand der zeichnerischen Darstellung von Ausführungsbeispielen näher erläutert.The three-pass boiler according to the invention is as follows based on the graphic representation of exemplary embodiments explained in more detail.

Es zeigt schematisch

Fig.1
einen Längsschnitt durch den Dreizugheizkessel;
Fig.2
einen Querschnitt durch den Dreizugheizkessel längs Linie II-II in Fig.1;
Fig.3
eine Thermographiedarstellung der Temperatur-verhältnisse in einem Dreizugheizkessel der hier vorliegenden Art;
Fig.4
im Vergleich dazu eine entsprechende Thermographie eines Dreizugheizkessels der eingangs genannten Art und
Fig.5,6
perspektivische Einzeldarstellung der Leitbleche am Dreizugheizkessel gemäß Fig. 1,2.
It shows schematically
Fig. 1
a longitudinal section through the three-pass boiler;
Fig. 2
a cross section through the three-pass boiler along line II-II in Figure 1;
Fig. 3
a thermographic representation of the temperature conditions in a three-pass boiler of the type here;
Fig. 4
in comparison, a corresponding thermography of a three-pass boiler of the type mentioned and
Fig. 5.6
perspective individual illustration of the guide plates on the three-pass boiler according to FIG. 1,2.

Der Dreizugheizkessel besteht gemäß Fig.1, wie bisher auch schon, aus einem wasserführenden Gehäuse 4 mit Vor-und Rücklaufanschlüssen 5,6, in dem ein mit Brenner 1'' bestückter Feuerraum 1' als erster Zug 1, ein bezogen auf den Feuerraum 1' entgegengesetzt durchströmbarer zweiter Zug 2 und ein aus mehreren Heizgaszugrohren 3' bestehender und in gleicher Richtung wie der Feuerraum 1' durchströmbarer dritter Zug 3 angeordnet sind, wobei der zweite und dritte Zug 2,3 im Bereich des Brenners 1'' vom, wie dargestellt, formangepaßt gebogenen Leitblech 7 abgeschirmt sind, dessen Scheitelgerade 7' sich mittig unter dem Rücklaufanschluß 6 erstreckt.The three-pass boiler according to Fig.1, as before already, from a water-bearing housing 4 with a front and Return connections 5,6, in which a burner equipped with 1 '' Combustion chamber 1 'as the first train 1, based on the combustion chamber 1 'can be flowed through in the opposite direction Train 2 and one consisting of several heating gas pipes 3 ' and flowable in the same direction as the combustion chamber 1 ' third train 3 are arranged, the second and third train 2, 3 in the area of the burner 1 ″ from, as shown, form-fitting curved guide plate 7 shielded are, whose apex line 7 'is located centrally under the return connection 6 extends.

Für einen solchen Dreizugheizkessel ist unter Verweis auf Fig.1,2 wesentlich, daß das Leitblech 7, bezogen auf die Mittelsenkrechte MS, im mittleren Bereich seiner gebogenen Schenkel 7'' mit über deren Breite B verteilt angeordneten Öffnungen 9 versehen ist.For such a three-pass boiler, reference is made to Fig.1.2 essential that the baffle 7, based on the Medium perpendicular MS, in the middle area of its curved Legs 7 '' arranged over their width B distributed Openings 9 is provided.

Wie vorerwähnt und insbesondere unter Verweis auf Fig.2 , wird das vom Rücklaufanschluß 6 in den Kessel einströmende relativ kalte Rücklaufwasser vom Leitblech 7 am zweiten und dritten Heizgaszug 2,3 vorbeigeführt. Durch die im mittleren Bereich der Schenkel 7'' des Leitbleches 7 angeordneten Öffnungen 9 wird dabei aber bereits erwärmtes Kesselwasser dem vergleichsweise kalten Rücklaufwasser zugeführt. Dieses somit vorgewärmte Rücklaufwasser strömt dann weiter in Richtung des den ersten Zug 1 bildenden Feuerraumes 1'.As mentioned above and in particular with reference to FIG. 2, is the inflowing from the return port 6 into the boiler relatively cold return water from the baffle 7 on the second and passed third heating gas flue 2,3. Through the im middle region of the legs 7 '' of the guide plate 7 arranged However, openings 9 are already heated Boiler water is fed to the comparatively cold return water. This preheated return water flows then continue in the direction of the first train 1 Firebox 1 '.

Bezüglich des Einstromverhaltens des erwärmten Kesselwassers zum kalten Rücklaufwasser durch die Öffnungen 9 sind diese vorteilhaft mit sogenannten Leitlaschen 9', wie in Fig.2 dargestellt, versehen, die nach unten orientiert und geneigt in den vom Leitblech 7 und der Gehäusewand 4' begrenzten Rücklaufspalt 10 ragen.Regarding the inflow behavior of the heated boiler water to the cold return water through the openings 9 this advantageously with so-called guide tabs 9 ', as in Fig.2 shown, provided that oriented downwards and inclined in the from the guide plate 7 and the housing wall 4 ' limited return gap 10 protrude.

In den Fig.1 und 2 sind im Scheitelbereich 11 des gebogenen Leitbleches 7 kleine Löcher 8 dargestellt, durch die ein gewisser Teil des unter Druck zugeführten Rücklaufwassers dem bereits erwärmten Kesselwasser zugemischt wird. Diese an sich bekannte Lochanordnung dient dazu, einen Teil des Rücklaufwassers direkt mit dem erwärmten Kesselwasser zu vermischen. Da es sich dabei um eine vergleichsweise geringe Menge handelt, besteht einerseits aufgrund der in diesem Bereich noch heißen Abgaszüge keine Gefahr der Schwitzwasserbildung, anderseits wird durch diese Rücklaufzufuhr durch die Löcher 8 zwangsläufig der Warmwasseraustritt aus den Öffnungen 9 bzw. Schlitzen bis zu einem gewissen Grade zusätzlich intensiviert.1 and 2 are in the apex region 11 of the bent Baffle 7 small holes 8 shown through the a certain part of the return water supplied under pressure is added to the already heated boiler water. This well-known hole arrangement is used to Part of the return water directly with the heated boiler water to mix. Since this is a comparative small amount, is due on the one hand the flue gas ducts, which are still hot in this area, pose no danger condensation, on the other hand, by this Return feed through the holes 8 inevitably the hot water outlet from the openings 9 or slots up to intensified to a certain degree.

Das durch diese Kessel- bzw. spezielle Leitblechausbildung erreichbare Ergebnis ist in Fig.3 dargestellt. Im Vergleich zur Fig.4, deren Thermographie (normalerweise farbig) von einem Dreizugheizkessel der eingangs genannten Art stammt, wird aus Fig.3 deutlich, daß dort der kondensatverhindernde Temperaturbereich TB (kreuzschraffiert) wesentlich tiefer heruntergedrückt ist, d.h., die sich im Bereich hinter dem Rücklaufbereich erstreckenden Teile des zweiten Zuges 2 und die am tiefsten liegenden Teile des dritten Zuges 3 werden nicht mehr vom kalten Rücklaufwasser erreicht.This through this boiler or special baffle training achievable result is shown in Fig.3. Compared to Fig. 4, whose thermography (usually colored) from a three-pass boiler of the type mentioned Type 3, it is clear from Fig.3 that there the condensate-preventing Temperature range TB (cross-hatched) is depressed much deeper, i.e., which is in the Area behind the return area extending parts of the second move 2 and the deepest parts of the third turn 3 are no longer from the cold return water reached.

Um dem vorerwähnten nachteiligen Effekt mangelnder Kühlung der Begrenzungswand 12 zu begegnen, besteht eine vorteilhafte Weiterbildung des Leitbleches 7 darin, daß im Scheitelbereich 11 des Rückströmkanales 5 zur Begrenzungswand 12 der Überströmkammer 4' hin eine einen Teil des Rücklaufwassers an die Begrenzungswand 12 leitende Schlitzöffnung 13 angeordnet ist.To the above-mentioned adverse effect of lack of cooling encountering the boundary wall 12 is an advantageous one Training of the guide plate 7 in that in the apex area 11 of the return flow channel 5 to the boundary wall 12 of the overflow chamber 4 'towards a part of the return water to the boundary wall 12 conductive slot opening 13 is arranged.

Hierzu wird auf die Fig.5,6 verwiesen, die zwei unterschiedliche Ausführungsformen von Leitblechen 7 zeigen. Das Leitblech 7 gemäß Fig.5 weist dabei an beiden Rändern gegen die in diesen Fig.5,6 nicht dargestellte Gehäusewand W abgekröpfte Stege 7' auf, während das andere, in Fig.6 dargestellte Leitblech 7 zur Begrenzungswand 12 der Überströmkammer 4' hin keinen solchen Steg 7' hat und mit seinem unverformten Rand R direkt gegen die Begrenzungswand 12 gestoßen ist. Die Stege 7' und der Rand R werden bei der Gehäuseherstellung lediglich per Heftschweißung an der Gehäusewand W bzw. im Falle der Fig.6 bzgl. des Randes R an der Begrenzungswand 12 fixiert.For this, reference is made to FIGS. 5, 6, the two different ones Embodiments of guide plates 7 show. The guide plate 7 according to FIG. 5 has on both edges against the housing wall, not shown in these Fig. 5,6 W bent webs 7 ', while the other, in Fig.6 shown guide plate 7 to the boundary wall 12 of the overflow chamber 4 'has no such web 7' and with its undeformed edge R directly against the boundary wall 12 encountered. The webs 7 'and the edge R are only used in the manufacture of housings by tack welding on the housing wall W or in the case of Fig. 6 fixed with respect to the edge R on the boundary wall 12.

Entsprechend dieser jeweils speziellen Leitblechausbildung ist die hier wesentliche Schlitzöffnung 13 im Falle der Ausführungsform des Leitbleches 7 im begrenzungswandseitigen Steg 7' angeordnet (Fig.5) und im Falle der Ausführungsform nach Fig.6, wie dargestellt, direkt im Leitblechrand R. Wie gestrichelt in Fig.5 angedeutet, kann die Schlitzöffnung 13 in ihrer Tiefe auch der Höhe des Steges 7' entsprechen, und bei der Ausführungsform nach Fig.6 kann die Schlitzöffnung 13 mehr oder weniger tief in das Leitblech 7 eingeschnitten sein.According to this special guide plate design is the essential slot opening 13 in the case of Embodiment of the guide plate 7 in the boundary wall side Web 7 'arranged (Fig.5) and in the case of the embodiment 6, as shown, directly in the edge of the baffle R. As indicated by the dashed line in Fig. 5, the Slot opening 13 in depth and the height of the web 7 'correspond, and in the embodiment according to Fig.6 can the slot opening 13 more or less deep in the Baffle 7 to be cut.

Außerdem ist es möglich, die Schlitzöffnungen 13 in der Weise zu erzeugen, daß man den Steg 7' bzw. den Rand R des Leitbleches 7 lediglich zweifach anschneidet und die dadurch entstehende Blechfahne senkrecht nach unten biegt, wie dies in Fig.6 gestrichelt angedeutet ist. In einem solchen Falle ist es zweckmäßig, den Scheitelbereich 11 des Leitbleches 7 nicht gebogen sondern in erforderlicher Breite ebenflächig auszuformen.It is also possible to the slot openings 13 in the To generate that the web 7 'or the edge R of the Baffle plate 7 only cuts twice and thereby bends the resulting sheet metal flag vertically, as indicated by dashed lines in Fig. 6. In one In such a case, it is expedient for the crown region 11 of the guide plate 7 not bent but in the required Shape the width evenly.

Claims (6)

Dreizugheizkessel, bestehend aus einem wasserführenden, mit oben angeordneten Vor- und Rücklaufanschlüssen (5,6) versehenen Gehäuse (4), in dem ein mit Brenner (1'') bestückter Feuerraum (1') als erster Zug (1), ein bezogen auf den Feuerraum (1') entgegengesetzt durchströmbarer, zu einer brennerseitigen Überströmkammer (4') führender zweiter Zug (2) und ein aus mehreren Heizgaszugrohren (3') gebildeter, zum Rauchgasabzug (R) führender dritter Zug (3) angeordnet sind, wobei der zweite und dritte Zug (2, 3) brennerseitig von einem einen Rückströmkanal (10) begrenzenden Leitblech (7) gegen zuströmendes Rücklaufwasser abgeschirmt sind,
dadurch gekennzeichnet,
daß das Leitblech (7), bezogen auf die Mittelsenkrechte (MS) des Gehäuses (4), beidseitig im mittleren Bereich seiner an die Form des Gehäuses (4) angepaßten Schenkel (7'') mit über deren Breite (B) in mindestens jeweils einer Reihe verteilt angeordneten Ausströmöffnungen (9) versehen ist.
Three-pass boiler, consisting of a water-bearing housing (4) with supply and return connections (5,6) arranged at the top, in which a combustion chamber (1 ') fitted with a burner (1'') is used as the first train (1) on the combustion chamber (1 '), through which flow can flow in the opposite direction, to a burner-side overflow chamber (4'), and a second train (3), which is formed from several heating gas pipes (3 ') and leads to the flue gas discharge (R), are arranged, whereby the second and third train (2, 3) on the burner side are shielded from incoming return water by a guide plate (7) delimiting a return flow channel (10),
characterized,
that the baffle (7), based on the perpendicular (MS) of the housing (4), on both sides in the central region of its legs (7 '') adapted to the shape of the housing (4) with their width (B) in at least each a row of distributed outflow openings (9) is provided.
Dreizugheizkessel nach Anspruch 1,
dadurch gekennzeichnet,
daß die Ausströmöffnungen (9) in Form von Schlitzen (9'') ausgebildet sind.
Three-pass boiler according to claim 1,
characterized,
that the outflow openings (9) are designed in the form of slots (9 '').
Dreizugheizkessel nach Anspruch 1 oder 2.
dadurch gekennzeichnet,
daß die Ausströmöffnungen (9) mit Leitlaschen (9') versehen sind, die, nach unten orientiert und geneigt, in den vom Leitblech (7) und der Gehäusewand (4') begrenzten Rücklaufspalt (10) ragen.
Three-pass boiler according to claim 1 or 2.
characterized,
that the outflow openings (9) are provided with guide tabs (9 ') which, oriented downward and inclined, project into the return gap (10) delimited by the guide plate (7) and the housing wall (4').
Dreizugheizkessel nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß im Scheitelbereich (11) des Leitbleches (7) mindestens eine Reihe von Löchern (8) angeordnet ist.
Three-pass boiler according to one of claims 1 to 3,
characterized,
that at least one row of holes (8) is arranged in the apex region (11) of the guide plate (7).
Dreizugheizkessel nach einem der Ansprüche 1bis4
dadurch gekennzeichnet,
daß im Scheitelbereich (11) des vom Leitblech (7) begrenzten Rückströmkanales (10) zur Begrenzungswand (12) der Überströmkammer (4') hin eine einen Teil des Rücklaufwassers an die Begrenzungswand (12) leitende Schlitzöffnung (13) angeordnet ist.
Three-pass boiler according to one of claims 1 to 4
characterized,
that in the apex region (11) of the return flow channel (10) delimited by the guide plate (7) to the boundary wall (12) of the overflow chamber (4 '), a part of the return water leading to the boundary wall (12) has a slot opening (13).
Dreizugheizkessel nach Anspruch 5,
dadurch gekennzeichnet,
daß der zwecks Schlitzöffnungsbildung angeschnittene Blechbereich des Leitbleches (7) nach unten abgekröpft ausgebildet ist.
Three-pass boiler according to claim 5,
characterized,
that the sheet metal region of the guide plate (7) which has been cut for the purpose of forming the slot opening is bent downward.
EP98120713A 1997-11-06 1998-10-31 Three-pass boiler Expired - Lifetime EP0915304B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE29719718U 1997-11-06
DE29719719U 1997-11-06
DE29719718U DE29719718U1 (en) 1997-11-06 1997-11-06 Three-pass boiler
DE29719719U DE29719719U1 (en) 1997-11-06 1997-11-06 Three-pass boiler

Publications (3)

Publication Number Publication Date
EP0915304A2 true EP0915304A2 (en) 1999-05-12
EP0915304A3 EP0915304A3 (en) 2001-05-02
EP0915304B1 EP0915304B1 (en) 2005-03-16

Family

ID=26060874

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98120713A Expired - Lifetime EP0915304B1 (en) 1997-11-06 1998-10-31 Three-pass boiler

Country Status (3)

Country Link
EP (1) EP0915304B1 (en)
AT (1) ATE291205T1 (en)
DE (1) DE59812657D1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1369647A3 (en) * 2002-06-04 2005-01-19 Bradford White Corporation High efficiency water heater
US8807093B2 (en) 2011-05-19 2014-08-19 Bock Water Heaters, Inc. Water heater with multiple heat exchanging stacks
US10184690B2 (en) 2017-02-09 2019-01-22 Bock Water Heaters, Inc. Condensing water heater and condensation control system
PL127770U1 (en) * 2016-05-06 2019-04-23 Blaze Harmony S R O Warm water heating device with integrated automatic mixing of water for protection against low-temperature corrosion
US10969139B1 (en) 2019-04-23 2021-04-06 Willard Richard Water heater

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1568959B1 (en) 2004-02-24 2015-10-21 MAHLE Behr GmbH & Co. KG Brazed heat exchanger, especially condenser for automobiles

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1454464B1 (en) * 1963-10-09 1970-02-12 Otte & Co Kg Laurenz boiler
DE8414084U1 (en) * 1984-05-09 1985-10-03 Vießmann, Hans, Dr.h.c., 3559 Battenberg Shielding plate in the water-bearing interior of a boiler
DE9002830U1 (en) * 1990-03-12 1991-07-18 Vießmann, Hans, Dr.h.c., 3559 Battenberg boiler
DE4308759A1 (en) * 1993-03-19 1994-09-22 Froeling Kessel App Process or boiler for combined heating of a building heating system and a storage tank for domestic water
DE19528353A1 (en) * 1995-08-02 1997-02-06 Broetje August Gmbh & Co Heat generator for NT operation and method for operating the heat generator

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1369647A3 (en) * 2002-06-04 2005-01-19 Bradford White Corporation High efficiency water heater
US7559293B2 (en) 2002-06-04 2009-07-14 Bradford White Corporation High efficiency water heater
US7900589B2 (en) 2002-06-04 2011-03-08 Bradford White Corporation High efficiency water heater
US8807093B2 (en) 2011-05-19 2014-08-19 Bock Water Heaters, Inc. Water heater with multiple heat exchanging stacks
PL127770U1 (en) * 2016-05-06 2019-04-23 Blaze Harmony S R O Warm water heating device with integrated automatic mixing of water for protection against low-temperature corrosion
PL71155Y1 (en) * 2016-05-06 2019-12-31 Blaze Harmony S R O Warm water heating device with integrated automatic mixing of water for protection against low-temperature corrosion
US10184690B2 (en) 2017-02-09 2019-01-22 Bock Water Heaters, Inc. Condensing water heater and condensation control system
US10969139B1 (en) 2019-04-23 2021-04-06 Willard Richard Water heater

Also Published As

Publication number Publication date
EP0915304A3 (en) 2001-05-02
EP0915304B1 (en) 2005-03-16
ATE291205T1 (en) 2005-04-15
DE59812657D1 (en) 2005-04-21

Similar Documents

Publication Publication Date Title
CH616499A5 (en) Central heating system with a boiler and an additional heat exchanger for preheating the medium flowing back to the boiler
EP0915304A2 (en) Three-pass boiler
DE19854910B4 (en) boiler
DE2126226C3 (en) Heat exchanger
DE3205121C2 (en) Heating boiler
DE3403225C2 (en) Heating boiler
DE8605274U1 (en) Gas burner
DE3310072A1 (en) HEATING GAS TRAIN TRAINING ON HEATING BOILERS
DE29719719U1 (en) Three-pass boiler
EP0706016A1 (en) Gas boiler
DE10113589A1 (en) radiator
DE29503697U1 (en) Gas boiler
DE29719718U1 (en) Three-pass boiler
AT398627B (en) BOILER
EP0503146B1 (en) Flat heating gas draft tube especially for condensing boiler
DE4107948C1 (en) Heating gas flue pocket of two sheet metal blanks - top, conically tapering inlet duct, and conically widening, lower outlet duct
DE2239086A1 (en) HEAT EXCHANGERS, IN PARTICULAR FOR FLOW HEATERS
EP0430061B1 (en) Boiler
EP0188741A2 (en) Boiler
DE8422565U1 (en) Condensate boiler
DE2360899A1 (en) GAS BURNER
EP0532051A1 (en) Heat exchanger with lamella fins
AT150184B (en) Heat exchangers, in particular for liquids.
DE8710017U1 (en) Gas combustion device for boilers, hot water generators or similar.
DE3735321C1 (en) boiler

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE DE FR IT

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

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

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20010908

AKX Designation fees paid

Free format text: AT BE DE FR IT

17Q First examination report despatched

Effective date: 20030919

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

Owner name: VIESSMANN WERKE GMBH & CO KG

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE DE FR IT

REF Corresponds to:

Ref document number: 59812657

Country of ref document: DE

Date of ref document: 20050421

Kind code of ref document: P

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

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

26N No opposition filed

Effective date: 20051219

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

Ref country code: DE

Payment date: 20090907

Year of fee payment: 12

Ref country code: AT

Payment date: 20091022

Year of fee payment: 12

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

Ref country code: IT

Payment date: 20091029

Year of fee payment: 12

Ref country code: FR

Payment date: 20091014

Year of fee payment: 12

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

Ref country code: BE

Payment date: 20091008

Year of fee payment: 12

BERE Be: lapsed

Owner name: *VIESSMANN WERKE G.M.B.H. & CO. K.G.

Effective date: 20101031

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

Ref country code: FR

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

Effective date: 20101102

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20110630

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59812657

Country of ref document: DE

Effective date: 20110502

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

Ref country code: BE

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

Effective date: 20101031

Ref country code: AT

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

Effective date: 20101031

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

Ref country code: IT

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

Effective date: 20101031

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

Ref country code: DE

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

Effective date: 20110502