EP0693661A1 - Cast-iron sectional boiler - Google Patents

Cast-iron sectional boiler Download PDF

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Publication number
EP0693661A1
EP0693661A1 EP95109174A EP95109174A EP0693661A1 EP 0693661 A1 EP0693661 A1 EP 0693661A1 EP 95109174 A EP95109174 A EP 95109174A EP 95109174 A EP95109174 A EP 95109174A EP 0693661 A1 EP0693661 A1 EP 0693661A1
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EP
European Patent Office
Prior art keywords
water
boiler
return
hub
sectional
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
EP95109174A
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German (de)
French (fr)
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EP0693661B1 (en
Inventor
Hartmut Assmann
Helmut Abel
Erich Klein
Alex Dr. Ing. Müller
Wilfried Sikorra
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 date
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Publication of EP0693661A1 publication Critical patent/EP0693661A1/en
Application granted granted Critical
Publication of EP0693661B1 publication Critical patent/EP0693661B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/24—Water 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
    • F24H1/30—Water 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 being built up from sections
    • F24H1/32—Water 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 being built up from sections with vertical sections arranged side by side
    • 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 cast iron sectional boiler according to the preamble of claim 1.
  • a sectional boiler of this type is shown and described in DE 42 20 987 C2.
  • the boiler described in more detail there is a boiler with an atmospheric gas burner.
  • the heating gases rise vertically.
  • the water hub itself is located in an upper corner area. From here, the cool return water flows downwards outside and inside as heated water upwards. The desired guidance of the water flows is achieved by means of separating and guiding ribs within the water space.
  • the invention has for its object to provide a sectional boiler of this type in which no cool return water reaches the combustion chamber and heating gas draft walls in the not yet sufficiently preheated state.
  • sectional boiler according to the invention has the features mentioned in the characterizing part of patent claim 1.
  • the boiler is designed so that mixing zones are deliberately formed to the side of the water hub arranged centrally above the combustion chamber within the water chamber. These are designed so that the cool return water penetrates and mixes with the rising hot boiler water before it then sinks into the lower boiler area. The sinking will also take place laterally from the side mixing zones, so that cooler water is not initially applied directly to the combustion chamber walls. It is important that the return water also enters these mixing zones. This is served by a shielding element in or below the water hub, which prevents a direct waste heat flow from the cool return water and directs it into the mixing zones located to the side of the water hub.
  • the shielding element can be cast on as a shell-shaped separating rib or as an overall loose part below the water hub in the water space. It is possible to form the separating rib from cast-on rib sections and to insert loose insert parts between them. The cool return water must flow over the bowl-shaped separating rib and in this way is forced into the side mixing zones.
  • Inserted pipes with lateral flow openings allow the cool return water to enter the mixing zones in an even more targeted manner.
  • the return is connected at the end to an end link.
  • the flow can branch off from the upper area of the water space.
  • An end branch of the flow parallel to the return connection is also possible.
  • a special connector enables this type of connection.
  • the boiler element has water channels 1 to form a combustion chamber 2 and a heating gas train 3.
  • the water channels 1 open into an upper water hub 4.
  • Both the boiler return 5 and the boiler flow 6 are connected to this.
  • the boiler flow 6 either branches off from one of the boiler sections upwards (FIG. 3) or at the end next to the boiler return 5 (FIG. 4). The latter is done via a connector 7 to which the safety forward and return 8, 9 is connected.
  • Mixing zones 10 are formed on both sides of the upper water hub 4, in which the inflowing hot boiler water and the cooler return water intersect.
  • the return water is raised in temperature before it reaches the lower areas of the boiler.
  • a shielding element ensures that the return water actually gets into the mixing zones 10 and does not immediately sink to the wall of the combustion chamber 2.
  • This can consist of molded separating ribs 11 in the water space (Fig. 2). It is also possible to insert a half-shell into the water hub 4 (not shown).
  • a tube 12 in the water hub 4 also fulfills this purpose, with lateral flow openings 13 allowing the cool return water to exit only into the mixing zones 10 (FIGS. 3 + 4).
  • a lower water hub 14 only serves to connect the boiler sections to one another and to equalize water between the sections, but not to connect the heating network.

Abstract

The water heater is assembled from a number of cast modules. It has a central burner chamber (2) and smaller exhaust gas ducts (3) to spread the heating effect to the water ducts (1). The heater is assembled with the burner chamber horizontal. The heated water rises to a manifold at the top where some of the heated water is mixed with cool return water in special mixing zones (10) formed by guide ribs (11) in the casting. The modules are assembled via top (4) and bottom (14) clamping holes. The shaped guide ribs deflect some of the rising heated water to mix with the cool return flow. The cast ribs can be replaced by a metal insert tube with holes designed to inject cool water into the modules. <IMAGE>

Description

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

Ein Gliederheizkessel dieser Art ist in der DE 42 20 987 C2 dargestellt und beschrieben. Die Wasserkanäle, die den Brennraum und die Heizgaszüge bilden, münden dabei in eine große obere Wassernabe. An diese ist sowohl der Kesselvorlauf als auch der Kesselrücklauf angeschlossen. Bei dem dort näher beschriebenen Heizkessel handelt es sich um einen Kessel mit atmosphärischem Gasbrenner. Dabei steigen die Heizgase senkrecht nach oben. Die Wassernabe selbst liegt in einem oberen Eckbereich. Von hier strömt das kühle Rücklaufwasser außen nach unten und innen als aufgeheiztes Wasser nach oben. Durch Trenn- und Leitrippen innerhalb des Wasserraumes wird eine gewünschte Lenkung der Wasserströmungen erreicht.A sectional boiler of this type is shown and described in DE 42 20 987 C2. The water channels, which form the combustion chamber and the heating gas flues, open into a large upper water hub. Both the boiler flow and the boiler return are connected to this. The boiler described in more detail there is a boiler with an atmospheric gas burner. The heating gases rise vertically. The water hub itself is located in an upper corner area. From here, the cool return water flows downwards outside and inside as heated water upwards. The desired guidance of the water flows is achieved by means of separating and guiding ribs within the water space.

Ein besonderes Problem besteht bei Heizkesseln mit Gebläsefeuerung. Hier liegt die Wassernabe mittig oberhalb des Brennraumes. Das einströmende kühle Rücklaufwasser strömt nicht von selbst in die seitlichen Bereiche. Es wird vielmehr wegen seiner größeren Wichte absinken und im noch nicht ausreichend vorgewärmten Zustand auf die Brennraumwände gelangen. Obwohl bereits ein gewisser Mischeffekt zwischen dem kühlen Rücklaufwasser und dem heißeren Vorlaufwasser vorhanden ist, reicht dieser doch nicht aus, Taupunktunterschreitungen auf der Heizgasseite ganz zu verhindern.There is a particular problem with boilers with fan firing. Here the water hub is in the middle above the combustion chamber. The incoming cool return water does not automatically flow into the side areas. Rather, it will sink because of its greater weight and reach the combustion chamber walls in a state that has not yet been sufficiently preheated. Although there is already a certain mixing effect between the cool return water and the hot flow water, this is not sufficient to completely prevent the dew point from falling below the hot gas side.

Der Erfindung liegt die Aufgabe zugrunde, einen Gliederheizkessel dieser Art zu schaffen, bei dem kein kühles Rücklaufwasser im noch nicht ausreichend vorgewärmten Zustand auf die Brennraum- und Heizgaszugwände gelangt.The invention has for its object to provide a sectional boiler of this type in which no cool return water reaches the combustion chamber and heating gas draft walls in the not yet sufficiently preheated state.

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 patent claim 1.

Der Kessel ist so gestaltet, daß bewußt seitlich der mittig oberhalb des Brennraumes angeordneten Wassernabe Mischzonen innerhalb des Wasserraumes gebildet sind. Diese sind so ausgeführt, daß das kühle Rücklaufwasser jedenfalls das aufsteigende heiße Kesselwasser durchdringt und sich mit diesem vermischt, bevor es dann in den unteren Kesselbereich absinkt. Das Absinken wird aus den seitlichen Mischzonen auch seitlich erfolgen, so daß zunächst nicht unmittelbar die Brennraumwände mit kühlerem Wasser beaufschlagt werden. Es ist wichtig, daß das Rücklaufwasser auch in diese Mischzonen gelangt. Dem dient ein Abschirmelement in oder unterhalb der Wassernabe, welches eine direkte Abwärmsströmung des kühlen Rücklaufwassers verhindert und eine Lenkung in die seitlich der Wassernabe liegenden Mischzonen bewirkt.The boiler is designed so that mixing zones are deliberately formed to the side of the water hub arranged centrally above the combustion chamber within the water chamber. These are designed so that the cool return water penetrates and mixes with the rising hot boiler water before it then sinks into the lower boiler area. The sinking will also take place laterally from the side mixing zones, so that cooler water is not initially applied directly to the combustion chamber walls. It is important that the return water also enters these mixing zones. This is served by a shielding element in or below the water hub, which prevents a direct waste heat flow from the cool return water and directs it into the mixing zones located to the side of the water hub.

Das Abschirmelement kann als schalenförmige Trennrippe oder als Gesamtlosteil unterhalb der Wassernabe im Wasserraum angegossen sein. Dabei ist es möglich, die Trennrippe aus angegossenen Rippenpartien zu bilden und lose Einsatzteile zwischenzufügen. Das kühle Rücklaufwasser muß die schalenförmige Trennrippe überströmen und kommt auf diese Weise zwangsweise in die seitlichen Mischzonen.The shielding element can be cast on as a shell-shaped separating rib or as an overall loose part below the water hub in the water space. It is possible to form the separating rib from cast-on rib sections and to insert loose insert parts between them. The cool return water must flow over the bowl-shaped separating rib and in this way is forced into the side mixing zones.

Denselben Zweck erfüllt auch eine Halbschale, die von der Stirnseite eingeschoben wird und alle Kesselglieder durchdringt. Das erlaubt ein Nachrüsten und ein späteres Anpassen an die sich einstellenden Gegebenheiten im Wasserraum.The same purpose is also served by a half-shell, which is pushed in from the front and penetrates all boiler sections. This allows retrofitting and later adaptation to the existing conditions in the water space.

Eingeschobene Rohre mit seitlichen Strömungsöffnungen ermöglichen ein noch gezielteres Eintreten des kühlen Rücklaufwassers in die Mischzonen.Inserted pipes with lateral flow openings allow the cool return water to enter the mixing zones in an even more targeted manner.

Der Rücklauf wird jedenfalls stirnseitig an ein Endglied angeschlossen. Der Vorlauf kann vom oberen Bereich des Wasserraumes abzweigen. Auch ein stirnseitiger Abzweig des Vorlaufs parallel zum Rücklaufanschluß ist möglich. Ein spezielles Anschlußstück ermöglicht diese Anschlußart.In any case, the return is connected at the end to an end link. The flow can branch off from the upper area of the water space. An end branch of the flow parallel to the return connection is also possible. A special connector enables this type of connection.

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

  • Fig. 1: Die Vorderansicht eines Kesselgliedes,
  • Fig. 2: Den Schnitt A-A aus Fig. 1,
  • Fig. 3 + 4: Zwei vergrößerte Versionen des oberen Nabenbereiches eines Gliederkessels im Schnitt.
The drawing shows an embodiment of the invention. It shows:
  • 1: the front view of a boiler member,
  • 2: section AA from FIG. 1,
  • Fig. 3 + 4: Two enlarged versions of the upper hub area of a sectional boiler in section.

Das Kesselglied besitzt Wasserkanäle 1 zur Ausbildung eines Brennraumes 2 und eines Heizgaszuges 3. Die Wasserkanäle 1 münden in eine obere Wassernabe 4. An diese ist sowohl der Kesselrücklauf 5 als auch der Kesselvorlauf 6 angeschlossen. Der Kesselvorlauf 6 zweigt entweder von einem der Kesselglieder nach oben ab (Fig. 3) oder stirnseitig neben dem Kesselrücklauf 5 (Fig. 4). Letzteres erfolgt über ein Anschlußstück 7, an das auch der Sicherheitsvor- und -rücklauf 8, 9 angeschlossen ist.The boiler element has water channels 1 to form a combustion chamber 2 and a heating gas train 3. The water channels 1 open into an upper water hub 4. Both the boiler return 5 and the boiler flow 6 are connected to this. The boiler flow 6 either branches off from one of the boiler sections upwards (FIG. 3) or at the end next to the boiler return 5 (FIG. 4). The latter is done via a connector 7 to which the safety forward and return 8, 9 is connected.

Beiderseit der oberen Wassernabe 4 sind Mischzonen 10 gebildet, in denen sich das aufströmende heiße Kesselwasser und das kühlere Rücklaufwasser kreuzen. Dabei erfolgt eine Temperaturanhebung des Rücklaufwassers, bevor dieses in die unteren Bereiche des Kessels gelangt. Dafür, daß das Rücklaufwasser auch tatsächlich in die Mischzonen 10 gelangt und nicht sofort auf die Wand des Brennraumes 2 absinkt, sorgt ein Abschirmelement. Dieses kann aus angegossenen Trennrippen 11 im Wasserraum bestehen (Fig. 2). Es ist auch möglich, eine Halbschale in die Wassernabe 4 einzuschieben (nicht dargestellt). Auch ein Rohr 12 in der Wassernabe 4 erfüllt diesen Zweck, wobei seitliche Strömungsöffnungen 13 einen Austritt des kühlen Rücklaufwassers nur in die Mischzonen 10 hinein zuläßt (Fig. 3 + 4). Eine untere Wassernabe 14 dient nur der Verbindung der Kesselglieder untereinander und einem Wasserausgleich zwischen den Gliedern, jedoch nicht dem Anschluß des Heizungsnetzes.Mixing zones 10 are formed on both sides of the upper water hub 4, in which the inflowing hot boiler water and the cooler return water intersect. The return water is raised in temperature before it reaches the lower areas of the boiler. A shielding element ensures that the return water actually gets into the mixing zones 10 and does not immediately sink to the wall of the combustion chamber 2. This can consist of molded separating ribs 11 in the water space (Fig. 2). It is also possible to insert a half-shell into the water hub 4 (not shown). A tube 12 in the water hub 4 also fulfills this purpose, with lateral flow openings 13 allowing the cool return water to exit only into the mixing zones 10 (FIGS. 3 + 4). A lower water hub 14 only serves to connect the boiler sections to one another and to equalize water between the sections, but not to connect the heating network.

Claims (8)

Gußeißerner Gliederheizkessel aus vertikalen Kesselgliedern mit Wasserkanälen zur Ausbildung eines Brennraumes und eines Heizgaszuges, welche in eine obere dem Anschluß sowohl des Kesselvorlaufs als auch des Kesselrücklaufs dienende Wassernabe einmünden,
dadurch gekennzeichnet, daß seitlich der oberhalb des Brennraumes (2) angeordneten Wassernabe (4) Mischzonen (10) innerhalb des Wasserraumes gebildet sind und daß ein Abschirmelement eine direkte Abwärtsströmung des kühlen Rücklaufwassers verhindert und eine Lenkung in die seitlich der Wassernabe (4) liegenden Mischzonen (10) bewirkt.Cast iron sectional boiler consisting of vertical boiler sections with water channels to form a combustion chamber and a heating gas flue, which open into an upper water hub serving to connect both the boiler flow and the boiler return,
characterized in that side of the water hub (4) arranged above the combustion chamber (4) mixing zones (10) are formed within the water chamber and that a shielding element prevents a direct downward flow of the cool return water and directing into the mixing zones lying to the side of the water hub (4) (10) causes. Gliederheizkessel nach Anspruch 1,
dadurch gekennzeichnet, daß das Abschirmelement als schalenförmige Trennrippe (11) unterhalb der Wassernabe (4) innerhalb des Wasserraumes angegossen ist.Sectional boiler according to claim 1,
characterized in that the shielding element is cast as a shell-shaped separating rib (11) below the water hub (4) within the water space. Gliederheizkessel nach den Ansprüchen 1 und 2,
dadurch gekennzeichnet, daß die schalenförmige Trennrippe aus angegossenen Rippenpartien und zwischengefügten Einsatzteilen besteht.Sectional boiler according to claims 1 and 2,
characterized in that the cup-shaped separating rib consists of cast-on rib sections and interposed insert parts. Gliederheizkessel nach Anspruch 1,
dadurch gekennzeichnet, daß das Abschirmelement als eine in die Wassernabe von der Stirnseite her eingeschobene, alle Wassernaben benachbarter Kesselglieder durchdringende Halbschale ausgebildet ist.Sectional boiler according to claim 1,
characterized in that the shielding element is designed as a half-shell inserted into the water hub from the end face and penetrating all water hubs of adjacent boiler sections. Gliederheizkessel nach Anspruch 1,
dadurch gekennzeichnet, daß das Abschirmelement als ein in die Wassernabe von der Stirnseite (4) her eingeschobenes, alle Wassernaben benachbarter Kesselglieder durchdringendes Rohr (12) mit seitlichen Strömungsöffnungen (13) ausgebildet ist.Sectional boiler according to claim 1,
characterized in that the shielding element is designed as a tube (12) with lateral flow openings (13) which is pushed into the water hub from the end face (4) and penetrates all water hubs of adjacent boiler sections. Gliederheizkessel nach Anspruch 5,
dadurch gekennzeichnet, daß an das Rohr (12) stirnseitig der Kesselrücklauf (5) angeschlossen ist und daß vom oberen Bereich des das Rohr (12) umgebenden Wasserraumes der Kesselvorlauf (6) abzweigt.Sectional boiler according to claim 5,
characterized in that the boiler return (5) is connected to the end of the pipe (12) and in that the boiler flow (6) branches off from the upper region of the water space surrounding the pipe (12). Gliederheizkessel nach Anspruch 6,
dadurch gekennzeichnet, daß der Kesselvorlauf (6) von einem der Kesselglieder nach oben abzweigt.Sectional boiler according to claim 6,
characterized in that the boiler flow (6) branches off from one of the boiler sections. Gliederheizkessel nach Anspruch 8,
gekennzeichnet durch stirnseitig aufgesetztes Anschlußstück (7) mit je einem vom Kesselrücklauf (5) zum Rohr (12) und vom umgebenden Wasserraum zum Kesselvorlauf (6) und gleichzeitig zum Sicherheitsvor- und -rücklauf (8, 9) führenden Bereich.Sectional boiler according to claim 8,
characterized by a connection piece (7) on the end face, each with an area leading from the boiler return (5) to the pipe (12) and from the surrounding water space to the boiler supply (6) and at the same time to the safety supply and return (8, 9).
EP95109174A 1994-07-18 1995-06-14 Cast-iron sectional boiler Expired - Lifetime EP0693661B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4425302 1994-07-18
DE4425302A DE4425302C2 (en) 1994-07-18 1994-07-18 Cast iron sectional boiler

Publications (2)

Publication Number Publication Date
EP0693661A1 true EP0693661A1 (en) 1996-01-24
EP0693661B1 EP0693661B1 (en) 1997-07-16

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Family Applications (1)

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EP95109174A Expired - Lifetime EP0693661B1 (en) 1994-07-18 1995-06-14 Cast-iron sectional boiler

Country Status (3)

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EP (1) EP0693661B1 (en)
AT (1) ATE155571T1 (en)
DE (2) DE4425302C2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0870998A1 (en) * 1997-04-11 1998-10-14 De Dietrich Thermique Boiler with return water injection in the lower part of the heat exchanger
EP0825393A3 (en) * 1996-08-08 1999-05-12 VIESSMANN WERKE GmbH &amp; CO. Heating boiler casing
EP1686328A1 (en) * 2004-12-22 2006-08-02 Robert Bosch GmbH Sectional boiler
CZ307039B6 (en) * 2016-05-06 2017-12-06 Blaze Harmony S.R.O. A heat-duct heater with integrated automatic mixing of water for protection against low-temperature corrosion
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

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE102009024070A1 (en) 2009-06-05 2010-12-09 Robert Bosch Gmbh A sectional boiler
DE102009024442A1 (en) 2009-06-10 2011-01-05 Robert Bosch Gmbh A sectional boiler
DE102010023556A1 (en) 2010-06-11 2011-12-15 Robert Bosch Gmbh A sectional boiler

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CH186211A (en) * 1936-03-06 1936-09-15 Moeri & Cie Hot water boiler.
FR1285073A (en) * 1961-03-29 1962-02-16 Device for introducing return water from hot water heating systems to heating boilers
DE4220987C2 (en) 1992-06-26 1994-04-14 Buderus Heiztechnik Gmbh Sectional boiler

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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.
DE3015377C2 (en) * 1980-04-22 1983-10-06 Wolf Klimatechnik GmbH, 8302 Mainburg Heating boilers for hot water heating systems
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
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
DE9318956U1 (en) * 1993-12-10 1994-02-10 Philipp Christian Dr Ing Device for return flow admixture in a boiler

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH186211A (en) * 1936-03-06 1936-09-15 Moeri & Cie Hot water boiler.
FR1285073A (en) * 1961-03-29 1962-02-16 Device for introducing return water from hot water heating systems to heating boilers
DE4220987C2 (en) 1992-06-26 1994-04-14 Buderus Heiztechnik Gmbh Sectional boiler

Cited By (8)

* 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
EP0870998A1 (en) * 1997-04-11 1998-10-14 De Dietrich Thermique Boiler with return water injection in the lower part of the heat exchanger
FR2762075A1 (en) * 1997-04-11 1998-10-16 Dietrich Thermique BOILER WITH LOW INJECTION OF RETURN WATER INTO THE HEATING BODY
EP1686328A1 (en) * 2004-12-22 2006-08-02 Robert Bosch GmbH Sectional boiler
CZ307039B6 (en) * 2016-05-06 2017-12-06 Blaze Harmony S.R.O. A heat-duct heater with integrated automatic mixing of water for protection against low-temperature corrosion
WO2017190716A3 (en) * 2016-05-06 2017-12-14 Blaze Harmony S.R.O. Hot-water heater with integrated automatic mixing of water for low-temperature corrosion protection
DE212017000127U1 (en) 2016-05-06 2018-12-20 Blaze Harmony S.R.O. Thermally conductive heater with integrated automatic water mixture to protect against low temperature corrosion
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

Also Published As

Publication number Publication date
DE4425302A1 (en) 1996-01-25
EP0693661B1 (en) 1997-07-16
ATE155571T1 (en) 1997-08-15
DE59500387D1 (en) 1997-08-21
DE4425302C2 (en) 1998-08-06

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