EP0016915B1 - Central heating boiler - Google Patents

Central heating boiler Download PDF

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Publication number
EP0016915B1
EP0016915B1 EP80100405A EP80100405A EP0016915B1 EP 0016915 B1 EP0016915 B1 EP 0016915B1 EP 80100405 A EP80100405 A EP 80100405A EP 80100405 A EP80100405 A EP 80100405A EP 0016915 B1 EP0016915 B1 EP 0016915B1
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EP
European Patent Office
Prior art keywords
combustion chamber
central heating
hot gas
heating boiler
gas duct
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP80100405A
Other languages
German (de)
French (fr)
Other versions
EP0016915A1 (en
Inventor
Heinz Dr. Klein
Werner Diebel
Helmut Benner
Horst Schröder
Willi Peter
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.)
Buderus AG
Original Assignee
Buderus AG
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 DE19792910409 external-priority patent/DE2910409C2/en
Priority claimed from DE19797909757 external-priority patent/DE7909757U1/en
Application filed by Buderus AG filed Critical Buderus AG
Priority to AT80100405T priority Critical patent/ATE2355T1/en
Publication of EP0016915A1 publication Critical patent/EP0016915A1/en
Application granted granted Critical
Publication of EP0016915B1 publication Critical patent/EP0016915B1/en
Expired 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
    • F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
    • 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
    • F24H1/26—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 forming an integral body
    • 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
    • F24H1/26—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 forming an integral body
    • F24H1/28—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 forming an integral body including one or more furnace or fire tubes
    • F24H1/287—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 forming an integral body including one or more furnace or fire tubes with the fire tubes arranged in line with the combustion chamber
    • 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
    • F24H1/44—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with combinations of two or more of the types covered by groups F24H1/24 - F24H1/40 , e.g. boilers having a combination of features covered by F24H1/24 - F24H1/40

Definitions

  • the invention relates to a central heating boiler made of sheet steel with a flame deflection pot in the rear area of a lying, cylindrical combustion chamber.
  • Boilers of this type can be found, for example, in DE-U-7524798.
  • a heating gas train or a secondary heating surface is arranged in the form of internals which are connected to the wall of the combustion chamber in a heat-conducting manner.
  • the internals can have the shape of the ribbed ribbons shown there. Longitudinal ribs of various cross-sections are often also inserted and welded to the wall of the combustion chamber before the flame deflection pot is inserted. The flame deflector is then only loosely inserted.
  • a boiler of this type is suitable, among other things. for smooth control of the boiler water temperature depending on the heat requirement. In doing so, deliberately falling below the dew point with the formation of condensation is accepted. The corrosion to be feared can then be prevented if the endangered areas are protected by special treatment and if it is ensured that the condensate formed at the start of the burner run evaporates again after the dew point has been exceeded in the end phase of the burner run.
  • the secondary heating surface forms more than 50%, preferably about 65% of the total heat exchange surface of the boiler. A large part of the heat transfer takes place in the area of the very effective secondary heating surface.
  • the flow of the condensate against the boiler door is prevented by a transverse embossing of the front, lower area of the wall of the combustion chamber.
  • combustion chamber 1 has a combustion chamber 2 formed by a cylindrical wall 1, which is closed at the front by a front door 3 with a burner opening 4.
  • a loose flame deflection pot 5 is inserted and supported by spacer 6 so that an annular cylindrical train 7 is formed.
  • the train 7 goes axially behind the combustion chamber 2 arranged shift cable 8 over, which opens into an exhaust pipe 9.
  • the additional cable 8 consists of pocket-shaped channels 10 with side impressions. Such parts can be coated well corrosion-resistant, and they have a very high effectiveness due to the frond flow.
  • embossing 11 In the front, lower area of the wall 1 of the combustion chamber 2 according to FIG. 3 there is an embossing 11 as a condensate accumulation. This embossing 11 prevents the flow of condensate, which can form at a boiler water temperature which is deliberately set below the dew point of the heating gases, against the front door 3. Damages in the sealing area of the door are thereby eliminated.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Description

Die Erfindung betrifft einen Zentralheizungskessel aus Stahlblech mit einem Flammenumlenktopf im hinteren Bereich eines liegenden, zylindrischen Brennraumes.The invention relates to a central heating boiler made of sheet steel with a flame deflection pot in the rear area of a lying, cylindrical combustion chamber.

Heizkessel dieser Art sind beispielsweise dem DE-U-7524798 zu entnehmen. In dem ringzylindrischen Zug zwischen dem Flammenumlenktopf und der inneren Wand des Brennraumes ist dabei ein Heizgaszug bzw. eine Nachschaltheizfläche in Form von Einbauten angeordnet, die wärmeleitend mit der Wand des Brennraumes verbunden sind. Die Einbauten können die Form der dort dargestellten Rippenbänder besitzen. Häufig werden auch Längsrippen unterschiedlichsten Querschnittes eingefügt und vor dem Einsetzen des Flammenumlenktopfes mit der Wand des Brennraumes verschweißt. Der Flammenumlenktopf wird dann nur lose eingeschoben.Boilers of this type can be found, for example, in DE-U-7524798. In the ring-cylindrical train between the flame deflection pot and the inner wall of the combustion chamber, a heating gas train or a secondary heating surface is arranged in the form of internals which are connected to the wall of the combustion chamber in a heat-conducting manner. The internals can have the shape of the ribbed ribbons shown there. Longitudinal ribs of various cross-sections are often also inserted and welded to the wall of the combustion chamber before the flame deflection pot is inserted. The flame deflector is then only loosely inserted.

Heizkessel dieser Art haben den Nachteil, daß an der zylindrischen Wand des Brennraumes sehr viele Verschweißungen vorgenommen werden müssen, denn nur die wärmeleitende Verbindung führt zu einer ausreichenden Wärmeübertragung. Neben der aufwendigen Arbeit ergeben sich besondere Probleme, wenn der Brennraum mit einer korrosionsfesten Beschichtung versehen werden soll. Die Rippen und die vielen Schweißnähte stehen einer einwandfreien Beschichtung entgegen, so daß die Korrosionssicherheit nicht immer garantiert werden kann.Boilers of this type have the disadvantage that a great deal of welding has to be carried out on the cylindrical wall of the combustion chamber, since only the heat-conducting connection leads to adequate heat transfer. In addition to the complex work, there are special problems when the combustion chamber is to be provided with a corrosion-resistant coating. The ribs and the many weld seams stand in the way of a perfect coating, so that corrosion resistance cannot always be guaranteed.

In weiterer Nachteil ist dann vorhanden, wenn ein Kessel dieser Art gleitend in Abhängigkeit von der Außentemperatur gefahren werden soll. In diesem Fall werden sich in Übergangszeiten und während der Nachtabsenkung sehr niedrige Kesselwassertemperaturen einstellen. Bei Unterschreiten des notwendigen Wertes wird die Temperatur durch Anspringen des Brenners angehoben, um anschließend wieder durch Wärmeabgabe an das Heizungsnetz abzufallen. Die Einbauten zwischen der Umkehrbrennkammer und der Wand des Brennraumes wirken während des Brennerbetriebes auch als Wärmespeicher. Nach dem Abschalten des Brenners wird ein Teil der Wärme noch an das Kesselwasser weitergeleitet. Ein großer Anteil der Wärme geht jedoch infolge des Zuges ungenutzt zum Schornstein hin verloren.Another disadvantage is when a boiler of this type is to be operated in a sliding manner depending on the outside temperature. In this case, very low boiler water temperatures will occur in transition periods and during the night setback. If the temperature falls below the required value, the burner starts up and then drops again to the heating network due to heat being given off. The internals between the reversing combustion chamber and the wall of the combustion chamber also act as heat stores during burner operation. After the burner is switched off, part of the heat is still transferred to the boiler water. A large proportion of the heat is lost to the chimney as a result of the draft.

Es soll ein Heizkessel geschaffen werden, der einfach zu fertigen und dessen Wärmeaustauschflächen problemlos und sicher zu beschichten sind. Einbauten mit einer Wärmespeicherwirkung, die bei einem Abfallen der Kesselwassertemperatur zu Wärmeverlusten führen, sollen vermieden werden.The aim is to create a boiler that is easy to manufacture and whose heat exchange surfaces can be coated easily and safely. Installations with a heat storage effect that lead to heat losses if the boiler water temperature drops should be avoided.

Gemäß der Erfindung geschieht dieses dadurch, daß der Heizgaszug keine Einbauten aufweist und daß in axialer Fortsetzung des Brennraumes ein weiterer Heizgaszug nachgeschaltet ist.According to the invention, this is done in that the heating gas train has no internals and that a further heating gas train is connected in the axial continuation of the combustion chamber.

Die Wand des Brennraumes besteht aus einem zylindrischen Mantel, der einfach zu fertigen und sicher zu beschichten ist. Ein- oder Anbauten, die eine einwandfreie Beschichtung behindern und die zu Wärmeverlusten führen könnten, sind nicht vorhanden. Der vorzugsweise aus taschenförmigen Kanälen mit seitlichen Einprägungen bestehende, weitere Heizgaszug oder Nachschaltzug läßt sich ebenfalls einfach fertigen und beschichten. Er kann ohne großen Aufwand an den Brennraum angefügt werden. Da der Nachschaltzug keine wärmespeichernden Einsätze besitzt, sind die Wärmeverluste zum Schornstein hin reduziert. Es wird sogar noch die Wärme, die von dem ungekühlten Flammenumlenktopf aufgenommen worden war, in dem nachgeschalteten Nachschaltzug an das Kesselwasser übertragen.The wall of the combustion chamber consists of a cylindrical jacket that is easy to manufacture and can be coated safely. There are no fittings or attachments that hinder a perfect coating and that could lead to heat loss. The further heating gas flue or secondary flue, which preferably consists of pocket-shaped channels with lateral embossments, can also be easily manufactured and coated. It can be attached to the combustion chamber with little effort. Since the additional cable does not have any heat-storing inserts, the heat losses to the chimney are reduced. Even the heat that was absorbed by the uncooled flame deflector is transferred to the boiler water in the downstream switching cable.

Ein Heizkessel dieser Art eignet sich u.a. für eine gleitende Regelung der Kesselwassertemperatur in Abhängigkeit vom Wärmebedarf. Dabei werden ganz bewußt Taupunktsunterschreitungen mit einer Kondenswasserbildung in Kauf genommen. Die zu befürchtenden Korrosionen können dann unterbunden werden, wenn die gefährdeten Flächen durch eine Spezialbehandlung geschützt sind und wenn sichergestellt ist, daß das zu Beginn des Brennerlaufes entstehende Kondensat nach dem Überschreiten des Taupunktes in der Endphase des Brennerlaufes wieder verdampft.A boiler of this type is suitable, among other things. for smooth control of the boiler water temperature depending on the heat requirement. In doing so, deliberately falling below the dew point with the formation of condensation is accepted. The corrosion to be feared can then be prevented if the endangered areas are protected by special treatment and if it is ensured that the condensate formed at the start of the burner run evaporates again after the dew point has been exceeded in the end phase of the burner run.

Es empfiehlt sich, den Heizkessel so zu gestalten, daß die Nachschaltheizfläche mehr als 50 %, vorzugsweise etwa 65 % der gesamten Wärmeaustauschfläche des Heizkessels bildet. Ein großer Teil des Wärmeübergangs erfolgt so im Bereich der sehr wirksamen Nachschaltheizfläche.It is advisable to design the boiler in such a way that the secondary heating surface forms more than 50%, preferably about 65% of the total heat exchange surface of the boiler. A large part of the heat transfer takes place in the area of the very effective secondary heating surface.

Da sich bei unterschrittenem Taupunkt auf jeden Fall Kondensat bildet, besteht die Gefahr, daß es auf dem Brennraumboden nach vorn gegen die Kesseltür und die Abdichtungen strömt. Es kann dort Schaden anrichten, zumal eine Verdampfung in diesem vorderen Bereich wegen der geringeren Wärmebeaufschlagung nur ungenügend ist.Since condensate forms in any case when the temperature falls below the dew point, there is a risk that it will flow forward on the combustion chamber floor against the boiler door and the seals. It can cause damage there, especially since evaporation in this front area is insufficient due to the lower heat exposure.

Das Vorströmen des Kondensats gegen die Kesseltür wird gemäß einem besonderen Kennzeichen der Erfindung durch eine quer verlaufende Hochprägung der vorderen, unteren Bereiches der Wand des Brennraumes verhindert.According to a special feature of the invention, the flow of the condensate against the boiler door is prevented by a transverse embossing of the front, lower area of the wall of the combustion chamber.

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

  • Figur 1 einen Heizkessel im Längsschnitt,
  • Figur 2 den Schnitt A-A aus Fig. 1,
  • Figur 3 einen weiteren Heizkessel im Längsschnitt und
  • Figur 4 den Schnitt B-B aus Fig. 3.
The accompanying drawing shows an embodiment of the invention. It shows:
  • 1 shows a boiler in longitudinal section,
  • FIG. 2 shows the section AA from FIG. 1,
  • Figure 3 shows another boiler in longitudinal section and
  • FIG. 4 shows the section BB from FIG. 3.

Der Heizkessel nach Fig. 1 besitzt einen durch eine zylindrische Wand 1 gebildeten Brennraum 2, der nach vorn durch eine Fronttür 3 mit einer Brenneröffnung 4 verschlossen ist. In den Brennraum 2 ist ein loser Flammenumlenktopf 5 eingesetzt und durch Abstanshalter 6 so gelagert, daß ein ringzylindrischer Zug 7 entsteht. Der Zug 7 geht in einen axial hinter dem Brennraum 2 angeordneten Nachschaltzug 8 über, der in einen Abgasstutzen 9 mündet.1 has a combustion chamber 2 formed by a cylindrical wall 1, which is closed at the front by a front door 3 with a burner opening 4. In the combustion chamber 2, a loose flame deflection pot 5 is inserted and supported by spacer 6 so that an annular cylindrical train 7 is formed. The train 7 goes axially behind the combustion chamber 2 arranged shift cable 8 over, which opens into an exhaust pipe 9.

Der Nachschaltzug 8 besteht aus taschenförmigen Kanälen 10 mit seitlichen Einprägungen. Solche Teile lassen sich gut korrosionsfest beschichten, und sie besitzen infolge der Wedelströmung eine sehr hohe Wirksamkeit.The additional cable 8 consists of pocket-shaped channels 10 with side impressions. Such parts can be coated well corrosion-resistant, and they have a very high effectiveness due to the frond flow.

Im vorderen, unteren Bereich der Wand 1 das Brennraumes 2 entsprechend Fig.3 ist eine Hochprägung 11 als Kondensatstau vorhanden. Diese Hochprägung 11 verhindert das Vorströmen von Kondensat, das sich bei einer bewußt unter den Taupunkt der Heizgase eingestellten Kesselwassertemperatur bilden kann, gegen die Fronttür 3. Schäden im Dichtungsbereich der Tür werden dadurch ausgeschaltet.In the front, lower area of the wall 1 of the combustion chamber 2 according to FIG. 3 there is an embossing 11 as a condensate accumulation. This embossing 11 prevents the flow of condensate, which can form at a boiler water temperature which is deliberately set below the dew point of the heating gases, against the front door 3. Damages in the sealing area of the door are thereby eliminated.

Claims (5)

1. A central heating boiler made of sheet steel, with a flame deflector pot (5) towards the rear of a cylindrical combustion chamber (2) lying on its side, and with a hot gas duct (7) consisting of the space between the flame deflector pot (5) and the wall (1) of the combustion chamber (2), whereby there are no structural elements in the hot gas duct, and such that the hot gas duct leads into a further hot gas duct (8) forming an axial extension of the combustion chamber (2).
2. A central heating boiler in accordance with Claim 1, whereby the surface of the downline hot gas duct (8) is more than 50 %, preferably around 65% of total boiler surface at which heat is exchanged.
3. A central heating boiler in accordance with Claims 1 and 2, whereby the downline hot gas duct (8) consists of pouch-shaped channels (10) with surface indentations.
4. A central heating boiler in accordance with Claim 1, whereby a ridge-like indentation (11) in the front lower portion of the wall (1) of the combustion chamber (2) runs across the chamber.
5. A central heating boiler in accordance with Claim 4, whereby the crown of the indentation forms a straight ridge.
EP80100405A 1979-03-16 1980-01-26 Central heating boiler Expired EP0016915B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80100405T ATE2355T1 (en) 1979-03-16 1980-01-26 CENTRAL HEATING BOILER.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19792910409 DE2910409C2 (en) 1979-03-16 1979-03-16 Collective heating boiler
DE2910409 1979-03-16
DE7909757U 1979-04-04
DE19797909757 DE7909757U1 (en) 1979-04-04 1979-04-04 CENTRAL HEATING BOILER

Publications (2)

Publication Number Publication Date
EP0016915A1 EP0016915A1 (en) 1980-10-15
EP0016915B1 true EP0016915B1 (en) 1983-01-26

Family

ID=25778259

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80100405A Expired EP0016915B1 (en) 1979-03-16 1980-01-26 Central heating boiler

Country Status (2)

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EP (1) EP0016915B1 (en)
DE (1) DE3061702D1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3425667A1 (en) * 1984-07-12 1986-01-23 Hans Dr.h.c. 3559 Battenberg Vießmann Heating boiler for liquid and gaseous fuels
EP0313837A1 (en) * 1987-10-27 1989-05-03 Hans Dr. Viessmann Gas heater
EP0321667B1 (en) * 1987-12-22 1992-03-25 Hans Dr. Viessmann Heater
DE4107947C1 (en) * 1991-03-13 1992-04-23 Hans Dr.H.C. 3559 Battenberg De Viessmann Boiler with flat sheets - has corrugations running in different directions to give rapid heat transfer
DE4117778C1 (en) * 1991-03-13 1992-09-10 Hans Dr. 3559 Battenberg De Viessmann

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1909126C3 (en) * 1969-02-24 1980-09-25 Buderus Ag, 6300 Lahn-Wetzlar Method of making a heating gas pocket for a heating boiler
DE7030538U (en) * 1970-08-14 1970-11-12 Burger Eisenwerke Ag HEATING BOILER WITH HEATING GAS DUCTS FOLLOWED BY THE COMBUSTION CHAMBER
DE2110178B2 (en) * 1971-03-03 1973-09-06 HOT WATER HEATER
DE2656517A1 (en) * 1976-12-14 1978-06-15 Broetje Fa August BOILER WITH NON-DIRECT WATER-COOLED COMBUSTION CHAMBER
DE2824185A1 (en) * 1978-06-02 1979-12-06 Roentgen & Co Liq. fuel or gas fired boiler - has integral smoke box formed by outer sleeve and containing heat exchanger

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Publication number Publication date
DE3061702D1 (en) 1983-03-03
EP0016915A1 (en) 1980-10-15

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