EP0575755A1 - Sectional boiler - Google Patents

Sectional boiler Download PDF

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Publication number
EP0575755A1
EP0575755A1 EP93108244A EP93108244A EP0575755A1 EP 0575755 A1 EP0575755 A1 EP 0575755A1 EP 93108244 A EP93108244 A EP 93108244A EP 93108244 A EP93108244 A EP 93108244A EP 0575755 A1 EP0575755 A1 EP 0575755A1
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EP
European Patent Office
Prior art keywords
boiler
water
return
flow
hub
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
EP93108244A
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German (de)
French (fr)
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EP0575755B1 (en
Inventor
Hartmut Dipl.-Ing. Assmann
Helmut Abel
Erich Klein
Friedhelm Dipl.-Ing. Koch
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.)
Bosch Thermotechnik GmbH
Original Assignee
Buderus Heiztechnik GmbH
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Publication of EP0575755A1 publication Critical patent/EP0575755A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/0005—Details for water heaters
    • F24H9/0036—Dispositions against condensation of combustion products
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/12—Arrangements for connecting heaters to circulation pipes
    • F24H9/13—Arrangements for connecting heaters to circulation pipes for water heaters

Definitions

  • the invention relates to a sectional boiler according to the preamble of claim 1.
  • Sectional boilers for atmospheric gas burners have vertical sections for the formation of pocket-like water spaces and vertical heating gas flues in between.
  • a boiler of this type can be found, for example, in DE 71 33 340 U. These water pockets usually open into upper and lower water hubs, on which the boiler sections are connected by nipples. The boiler return is conventionally connected to the lower water hub. The boiler flow branches off from the upper water hub.
  • the cold return water flows through the lower water hub into the water pockets. It is not possible to avoid falling below the dew point on the heating gas side in all cases, especially not when operating in the low temperature range. The resulting condensate can damage the boiler.
  • DE 32 08 731 A1 describes the application of a thermal barrier coating on the water side to avoid excessive cooling of the heating gases in the endangered area.
  • DE 82 07 592 U has a separating rib in the water space, which first guides the cold return water along the outer walls.
  • DE 84 33 051 U shows a guide tube for the cold return water in a steel boiler, through which this water is led into the upper, hotter zones of the water space. From here, the water is distributed so that direct exposure to the cooler, lower parts of the combustion chamber is avoided.
  • the invention was based on the object, especially in a sectional boiler for atmospheric gas burners, to enable largely condensate-free operation by the structural design of the boiler sections.
  • the sectional boiler according to the invention has the features mentioned in the characterizing part of claim 1.
  • each boiler section opens with its upper corner area into a large-volume water hub, to which both the boiler flow and the boiler return are connected.
  • an inner circulation is achieved in this way, in which the hot and the cool flow come together in the heat exchanger.
  • the cooler return water is preheated on the way to the lower zone in order to then return to the upper supply nozzle with greater heating.
  • the arrangement of the large-volume water hub in the upper corner area is essential for this function. In this way, the cool return water flows down on one side, then sweeps through the large area of water to be heated by the heating gases flowing past and finally gets back into the water hub in the corner area.
  • a separating rib below the water hub supports this flow.
  • the separating rib can be divided into several individual ribs. Guide ribs in the water pocket improve the full flow through the pocket.
  • a number of boiler sections 2 are arranged in the outer boiler housing 1, each of which is designed as a pocket-like water space 3 and delimits vertical heating gas flues 4 between them.
  • the water spaces 3 of each boiler element 2 open into a large-volume water hub 5 with an upper corner region.
  • the boiler sections 2 are connected by nipples.
  • Another connection is to a lower hub 6, which is used only for distributing the water between the water spaces 3.
  • the boiler return 7 is connected to the upper water hub 5 and the boiler supply 8 is connected inside. (Fig. 1).
  • the cool return water flows outside downwards and as hot flow water in the area of water spaces 3 up again.
  • Several guide ribs 10 serve to direct the flow within the water space.
  • the heating takes place by means of a conventional atmospheric gas burner 11. After flowing through the heating gas flues 4, the heating gases enter a flow safety device 12 and from there to the exhaust pipe 13.
  • the incoming cool return water must not fall below the dew point on the heating gas side. It is therefore desirable to mix the cool return water with the hot supply water in the upper hub. This is achieved in a boiler according to FIG. 3 in that the boiler return 7 is connected below the boiler flow 8. An annular rib 14 surrounding the lower part of the boiler return 7 within the water spaces 3 initially ensures an upward flow of the cool return water with a mixing effect.

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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)
  • Details Of Fluid Heaters (AREA)
  • Incineration Of Waste (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Fire-Extinguishing Compositions (AREA)

Abstract

A sectional boiler for atmospheric gas burners is to be designed in such a manner so as to prevent the heating gases falling below the dew point and thus the formation of condensate. To this end, the pocket-like water chambers (3) of each boiler section (2) open with an upper corner region into a large-volume water hub (5), to which the boiler forward run (8) and the boiler return run (7) are connected. An internal mixing with a rapid rise in the return run temperature occurs in the water chambers (3). The effect is supported by a separating rib (9) in the water chamber (3) for separating the cool return run and the warmer forward run flow. <IMAGE>

Description

Die Erfindung betrifft einen Gliederheizkessel nach dem Oberbegriff des Patentanspruches 1.The invention relates to a sectional boiler according to the preamble of claim 1.

Gliederheizkessel für atmosphärische Gasbrenner besitzen vertikale Kesselglieder zur Ausbildung von taschenartigen Wasserräumen und dazwischen liegenden, vertikalen Heizgaszügen. Ein Heizkessel dieser Art ist beispielsweise dem DE 71 33 340 U zu entnehmen. Dabei münden diese Wassertaschen üblicherweise in obere und untere Wassernaben ein, an denen die Kesselglieder durch Nippel miteinander verbunden sind. An die untere Wassernabe ist herkömmlich der Kesselrücklauf angeschlossen. Von der oberen Wassernabe zweigt der Kesselvorlauf ab.Sectional boilers for atmospheric gas burners have vertical sections for the formation of pocket-like water spaces and vertical heating gas flues in between. A boiler of this type can be found, for example, in DE 71 33 340 U. These water pockets usually open into upper and lower water hubs, on which the boiler sections are connected by nipples. The boiler return is conventionally connected to the lower water hub. The boiler flow branches off from the upper water hub.

Wie bei allen Gliederheizkesseln strömt das kalte Rücklaufwasser somit durch die untere Wassernabe in die Wassertaschen ein. Dabei sind Taupunktsunterschreitungen auf der Heizgasseite nicht in allen Fällen zu vermeiden, insbesondere nicht bei einer Betriebsweise im Niedertemperaturbereich. Das entstehende Kondensat kann zu Schäden am Kessel führen.As with all sectional heating boilers, the cold return water flows through the lower water hub into the water pockets. It is not possible to avoid falling below the dew point on the heating gas side in all cases, especially not when operating in the low temperature range. The resulting condensate can damage the boiler.

Es sind bereits unterschiedliche Vorschläge zur Vermeidung einer Kondensatbildung gemacht worden. Die DE 32 08 731 A1 beschreibt das Aufbringen einer Wärmedämmschicht auf der Wasserseite zur Vermeidung einer zu starken Kühlung der Heizgase im gefährdeten Bereich. Die DE 82 07 592 U weist eine Trennrippe im Wasserraum auf, welche das kalte Rücklaufwasser zunächst an den Außenwänden entlang leitet. Die DE 84 33 051 U zeigt bei einem Stahlheizkessel ein Leitrohr für das kalte Rücklaufwasser, durch das dieses Wasser in die oberen, heißeren Zonen des Wasserraumes geführt wird. Von hier aus verteilt sich das Wasser, so daß eine direkte Beaufschlagung der kühleren, unteren Partien der Brennkammer vermieden wird.Various proposals have been made to avoid the formation of condensate. DE 32 08 731 A1 describes the application of a thermal barrier coating on the water side to avoid excessive cooling of the heating gases in the endangered area. DE 82 07 592 U has a separating rib in the water space, which first guides the cold return water along the outer walls. DE 84 33 051 U shows a guide tube for the cold return water in a steel boiler, through which this water is led into the upper, hotter zones of the water space. From here, the water is distributed so that direct exposure to the cooler, lower parts of the combustion chamber is avoided.

Alle diese Maßnahmen können in gewissem Umfang zu einem Erfolg führen. Es sind jedoch besondere Schritte zu unternehmen wie das Einbringen einer Beschichtung oder das Einführen eines Leitrohres. Jedenfalls zeigen diese Schriften, daß ernsthafte Überlegungen angestellt wurden, eine Kondensatbildung bei Heizkesseln zu vermeiden.To a certain extent, all of these measures can lead to success. However, there are special steps to be taken, such as the introduction of a coating or the insertion of a guide tube. In any case, these writings show that serious considerations have been made to avoid condensate formation in boilers.

Der Erfindung lag die Aufgabe zugrunde, speziell bei einem Gliederheizkessel für atmosphärische Gasbrennern durch die konstruktive Gestaltung der Kesselglieder einen weitgehend kondensatfreien Betrieb zu ermöglichen.The invention was based on the object, especially in a sectional boiler for atmospheric gas burners, to enable largely condensate-free operation by the structural design of the boiler sections.

Der erfindungsgemäße Gliederheizkessel besitzt die im Kennzeichen des Patentanspruches 1 genannten Merkmale.The sectional boiler according to the invention has the features mentioned in the characterizing part of claim 1.

Der taschenartige Wasserraum eines jeden Kesselgliedes mündet mit seinem oberen Eckbereich in eine großvolumige Wassernabe ein, an die sowohl der Kesselvorlauf als auch der Kesselrücklauf angeschlossen ist. Im Gegensatz zu der bisherigen Aufwärtsströmung von den unteren, kühleren zu den oberen, wärmeren Bereichen wird auf diese Weise eine innere Zirkulation erzielt, bei der die heiße und die kühle Strömung im Wärmetauscher miteinander treten. Das kühlere Rücklaufwasser wird dabei auf dem Weg zur unteren Zone vorgewärmt, um dann stärker aufgeheizt wieder zum oberen Vorlaufstutzen zu gelangen. Wesentlich für diese Funktionsweise ist die Anordnung der großvolumigen Wassernabe im oberen Eckbereich. Auf diese Weise strömt das kühle Rücklaufwasser einseitig nach unten, streicht dann durch den großflächigen Wasserbereich, um dort durch die vorbeiströmenden Heizgase erwärmt zu werden und gelangt schließlich wieder in die Wassernabe im Eckbereich zurück. Eine Trennrippe unterhalb der Wassernabe unterstützt diese Strömung.The pocket-like water space of each boiler section opens with its upper corner area into a large-volume water hub, to which both the boiler flow and the boiler return are connected. In contrast to the previous upward flow from the lower, cooler to the upper, warmer areas, an inner circulation is achieved in this way, in which the hot and the cool flow come together in the heat exchanger. The cooler return water is preheated on the way to the lower zone in order to then return to the upper supply nozzle with greater heating. The arrangement of the large-volume water hub in the upper corner area is essential for this function. In this way, the cool return water flows down on one side, then sweeps through the large area of water to be heated by the heating gases flowing past and finally gets back into the water hub in the corner area. A separating rib below the water hub supports this flow.

Es empfiehlt sich, den Kesselrücklauf außen und den Kesselvorlauf innen an der großvolumigen Wassernabe anzuordnen. Die Trennrippe erzeugt dann eine Aufteilung der Wasserströmung in eine äußere Abwärtsströmung und in eine innere Aufwärtsströmung innerhalb der Wassertasche.It is advisable to arrange the boiler return on the outside and the boiler flow on the inside of the large-volume water hub. The separating rib then creates a division of the water flow into an outer downward flow and an inner upward flow within the water pocket.

Die Trennrippe kann in mehrere Einzelrippen aufgeteilt sein. Leitrippen in der Wassertasche verbessern die vollständige Durchströmung der Tasche.The separating rib can be divided into several individual ribs. Guide ribs in the water pocket improve the full flow through the pocket.

Die beigefügte Zeichnung stellt ein Ausführungsbeispiel der Erfindung dar. Es zeigt:

Fig. 1 + 3:
Einen Heizkessel mit einem Kesselglied in der Seitenansicht und
Fig. 2:
den Schnitt A-A aus Fig. 1.
The accompanying drawing shows an embodiment of the invention. It shows:
Fig. 1 + 3:
A boiler with a boiler section in the side view and
Fig. 2:
the section AA from Fig. 1st

Im äußeren Kesselgehäuse 1 sind eine Anzahl Kesselglieder 2 angeordnet, die jeweils als taschenartige Wasserräume 3 ausgebildet sind und vertikale Heizgaszüge 4 zwischen sich begrenzen. Die Wasserräume 3 eines jeden Kesselgliedes 2 münden mit einem oberen Eckbereich in eine großvolumige Wassernabe 5 ein. An den Wassernaben 5 sind die Kesselglieder 2 durch Nippel verbunden. Eine weitere Verbindung besteht an einer unteren Nabe 6, die nur zum Verteilen des Wassers zwischen den Wasserräumen 3 dient. An die obere Wassernabe 5 ist außen der Kesselrücklauf 7 und innen der Kesselvorlauf 8 angeschlossen. (Fig. 1). Das kühle Rücklaufwasser strömt außen nach unten und als heißes Vorlaufwasser im Bereich der Wasserräume 3 wieder nach oben. Eine Trennrippe 9, ggfs. in Form mehrerer Einzelrippen, unterteilt die Strömungen. Mehrere Leitrippen 10 dienen einer Lenkung der Strömung innerhalb des Wasserraumes.A number of boiler sections 2 are arranged in the outer boiler housing 1, each of which is designed as a pocket-like water space 3 and delimits vertical heating gas flues 4 between them. The water spaces 3 of each boiler element 2 open into a large-volume water hub 5 with an upper corner region. At the water hubs 5, the boiler sections 2 are connected by nipples. Another connection is to a lower hub 6, which is used only for distributing the water between the water spaces 3. The boiler return 7 is connected to the upper water hub 5 and the boiler supply 8 is connected inside. (Fig. 1). The cool return water flows outside downwards and as hot flow water in the area of water spaces 3 up again. A separating rib 9, possibly in the form of several individual ribs, divides the flows. Several guide ribs 10 serve to direct the flow within the water space.

Die Beheizung erfolgt durch einen üblichen atmosphärischen Gasbrenner 11. Nach dem Durchströmen der Heizgaszüge 4 gelangen die Heizgase in eine Strömungssicherung 12 und von dort zum Abgasstutzen 13.The heating takes place by means of a conventional atmospheric gas burner 11. After flowing through the heating gas flues 4, the heating gases enter a flow safety device 12 and from there to the exhaust pipe 13.

Das einströmende kühle Rücklaufwasser darf keine Unterschreitung des Taupunktes auf der Heizgasseite bewirken. Es ist deshalb eine Vermischung des kühlen Rücklaufwassers mit dem heißen Vorlaufwasser in der oberen Nabe anzustreben. Das wird bei einem Kessel gemäß Fig. 3 dadurch erreicht, daß der Kesselrücklauf 7 unterhalb des Kesselvorlaufs 8 angeschlossen ist. Eine den unteren Teil des Kesselrücklaufs 7 umgebende Ringrippe 14 innerhalb der Wasserräume 3 sorgt zunächst für eine Aufwärtsströmung des kühlen Rücklaufwassers mit einem Vermischungseffekt.The incoming cool return water must not fall below the dew point on the heating gas side. It is therefore desirable to mix the cool return water with the hot supply water in the upper hub. This is achieved in a boiler according to FIG. 3 in that the boiler return 7 is connected below the boiler flow 8. An annular rib 14 surrounding the lower part of the boiler return 7 within the water spaces 3 initially ensures an upward flow of the cool return water with a mixing effect.

Claims (5)

Gliederheizkessel für atmosphärische Gasbrenner, bestehend aus oberhalb eines Brennraumes angeordneten, vertikalen Kesselgliedern (2) zur Ausbildung von taschenartigen Wasserräumen (3) und dazwischen liegenden vertikalen Heizgaszügen (4),
dadurch gekennzeichnet, daß der taschenartige Wasserraum (3) eines jeden Kesselgliedes (2) mit einem oberen Eckbereich in eine großvolumige Wassernabe (5) einmündet, an die sowohl der Kesselvorlauf (8) als auch der Kesselrücklauf (7) angeschlossen ist, wobei im Wasserraum (3) unterhalb der Wassernabe (5) eine Trennrippe (9) für eine Trennung des abwärts strömenden, kalten Rücklauf- und des aufwärts strömenden, warmen Vorlaufwassers angeordnet ist.Sectional boiler for atmospheric gas burners, consisting of vertical boiler sections (2) arranged above a combustion chamber to form pocket-like water spaces (3) and vertical heating gas flues (4) in between,
characterized in that the pocket-like water space (3) of each boiler element (2) opens with an upper corner area into a large-volume water hub (5) to which both the boiler flow (8) and the boiler return (7) are connected, in the water space (3) below the water hub (5) a separating rib (9) for separating the downward flowing, cold return and the upward flowing, warm supply water is arranged. Gliederheizkessel nach Anspruch 1,
dadurch gekennzeichnet, daß die Trennrippe (9) eine Aufteilung der Wasserströmung in eine äußere Abwärtsströmung des kalten Rücklaufwassers von dem außen angeordneten Kesselrücklauf (7) und in eine innere Aufwärtsströmung des warmen Vorlaufwassers zum innen angeordneten Kesselvorlauf (8) bewirkt.Sectional boiler according to claim 1,
characterized in that the separating rib (9) causes the water flow to be divided into an external downward flow of the cold return water from the external boiler return (7) and an internal upward flow of the warm supply water to the internal boiler supply (8). Gliederheizkessel nach den Ansprüchen 1 und 2,
dadurch gekennzeichnet, daß die Trennrippe (9) im Wasserraum (3) in mehrere, aneinandergereihte Einzelrippen aufgeglieder ist und daß im Wasserraum (3) seitlich der Wassernabe (5) zusätzliche Leitrippen (10) angeordnet sind.Sectional boiler according to claims 1 and 2,
characterized in that the separating rib (9) in the water space (3) is divided into a plurality of individual ribs strung together and that additional guide ribs (10) are arranged in the water space (3) to the side of the water hub (5). Gliederheizkessel nach Anspruch 1,
dadurch gekennzeichnet, daß der Kesselrücklauf (7) und der Kesselvorlauf (8) auf einer Höhe nebeneinander an der großvolumigen Wassernabe (5) angeschlossen sind.Sectional boiler according to claim 1,
characterized in that the boiler return (7) and the boiler flow (8) are connected at a height next to one another on the large-volume water hub (5). Gliederheizkessel nach Anspruch 1,
dadurch gekennzeichnet, daß der Kesselrücklauf (7) unterhalb des Kesselvorlaufs (8) an die großvolumige Wassernabe (5) angeschlossen ist und daß eine den unteren Teil des Kesselrücklaufs (7) umgebende Ringrippe (14) innerhalb des Wasserraumes (3) zunächst eine Aufwärtsströmung des einströmenden, kalten Rücklaufwassers bewirkt.Sectional boiler according to claim 1,
characterized in that the boiler return (7) below the boiler feed (8) is connected to the large-volume water hub (5) and that an annular rib (14) surrounding the lower part of the boiler return (7) within the water space (3) initially an upward flow of the inflowing, cold return water causes.
EP93108244A 1992-06-26 1993-05-21 Sectional boiler Expired - Lifetime EP0575755B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4220987A DE4220987C3 (en) 1992-06-26 1992-06-26 Sectional boiler
DE4220987 1992-06-26

Publications (2)

Publication Number Publication Date
EP0575755A1 true EP0575755A1 (en) 1993-12-29
EP0575755B1 EP0575755B1 (en) 1995-04-26

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ID=6461891

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93108244A Expired - Lifetime EP0575755B1 (en) 1992-06-26 1993-05-21 Sectional boiler

Country Status (3)

Country Link
EP (1) EP0575755B1 (en)
AT (1) ATE121830T1 (en)
DE (2) DE4220987C3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0825393A3 (en) * 1996-08-08 1999-05-12 VIESSMANN WERKE GmbH &amp; CO. Heating boiler casing

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4425302C2 (en) * 1994-07-18 1998-08-06 Buderus Heiztechnik Gmbh Cast iron sectional boiler
DE19632028A1 (en) * 1996-08-08 1998-02-12 Viessmann Werke Kg Central heating boiler casing
DE19912409C1 (en) * 1999-03-19 2000-08-31 Viessmann Werke Kg Gas or liquid fueled heating boiler uses nozzle in return connection with outlet opening of smaller diameter than connection nipple to emit cone via specified opening angle.
DE10225508C1 (en) * 2002-06-10 2003-06-26 Viessmann Werke Kg Cast metal heating boiler has connection fitting for return connection provided by intermediate element fitted between front and rear wall elements
DE102005014616B3 (en) * 2005-03-31 2006-06-29 Robert Bosch Gmbh Articular central heating boiler e.g. atmospheric gas boiler, has exhaust gas emission opening arranged in extension of gas flue and middle unit in close area of the opening, where unit has overflow opening for heating gases of another flue
CN109114809B (en) * 2018-06-30 2021-02-23 安徽永鹏机械有限公司 Feeding hole fireproof device for hot blast stove

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH325732A (en) * 1954-08-18 1957-11-15 G Herzog & Co Ing Heating boiler
FR1468697A (en) * 1965-04-30 1967-02-10 Const De Vaux Andigny Atel Device for recycling the fluid of a heating and boiler installation fitted with such a device
DE4000850A1 (en) * 1990-01-13 1991-08-14 Buderus Heiztechnik Gmbh Sectional boiler for heating water - has vertical sections with water channels to form combustion chamber and gas flue

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1879203U (en) * 1960-03-31 1963-09-12 Oskar Jun Walter SECTIONAL BOILER WITH A DISTRIBUTION PIPE FOR THE RETURN WATER INSERTED IN A ROW OF NIPPLES, WITH OPENINGS TO THE SECTIONAL WATER ROOMS.
DE8207592U1 (en) * 1982-03-18 1982-08-05 Buderus Ag, 6330 Wetzlar CENTRAL HEATING BOILER
DE8433051U1 (en) * 1984-11-12 1985-02-28 Sieger Heizkesselwerk GmbH, 5910 Kreuztal BOILER FOR LIQUID OR GASEOUS FUELS
DE4116383A1 (en) * 1990-08-22 1992-02-27 Thyssen Industrie LINKED BOILER

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH325732A (en) * 1954-08-18 1957-11-15 G Herzog & Co Ing Heating boiler
FR1468697A (en) * 1965-04-30 1967-02-10 Const De Vaux Andigny Atel Device for recycling the fluid of a heating and boiler installation fitted with such a device
DE4000850A1 (en) * 1990-01-13 1991-08-14 Buderus Heiztechnik Gmbh Sectional boiler for heating water - has vertical sections with water channels to form combustion chamber and gas flue

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0825393A3 (en) * 1996-08-08 1999-05-12 VIESSMANN WERKE GmbH &amp; CO. Heating boiler casing

Also Published As

Publication number Publication date
DE4220987C3 (en) 1997-04-24
EP0575755B1 (en) 1995-04-26
DE59300156D1 (en) 1995-06-01
DE4220987A1 (en) 1994-01-05
DE4220987C2 (en) 1994-04-14
ATE121830T1 (en) 1995-05-15

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