EP0365640B1 - Low-temperature heating boiler - Google Patents

Low-temperature heating boiler Download PDF

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Publication number
EP0365640B1
EP0365640B1 EP89904764A EP89904764A EP0365640B1 EP 0365640 B1 EP0365640 B1 EP 0365640B1 EP 89904764 A EP89904764 A EP 89904764A EP 89904764 A EP89904764 A EP 89904764A EP 0365640 B1 EP0365640 B1 EP 0365640B1
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EP
European Patent Office
Prior art keywords
heating gas
heating
boiler
flap
gas flue
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EP89904764A
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German (de)
French (fr)
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EP0365640A1 (en
Inventor
Richard Müller
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Individual
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Priority to EP91115427A priority Critical patent/EP0466207B1/en
Priority to AT89904764T priority patent/ATE73224T1/en
Publication of EP0365640A1 publication Critical patent/EP0365640A1/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
    • F24H9/001—Guiding means
    • F24H9/0026—Guiding means in combustion gas channels
    • F24H9/0031—Guiding means in combustion gas channels with means for changing or adapting the path of the flue gas
    • 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
    • F24H1/285—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 alongside 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
    • F24H9/00—Details
    • F24H9/0005—Details for water heaters
    • F24H9/0036—Dispositions against condensation of combustion products

Definitions

  • the invention relates to a low-temperature boiler with a burner-receiving combustion chamber, a downstream heating gas train ending in the exhaust pipe and a surrounding boiler water jacket, whereby in addition to the heating gas train located above and / or below the combustion chamber, additional heating gas trains are also connected upstream, as seen in the flow direction.
  • low-temperature boilers of the generic type are used. Their basic task is to transfer the gas or oil introduced and ignited via the burner as heat to the surrounding boiler water and to feed it into the heating system. For reasons of improving energy use, more and more low-temperature boilers have been used recently, in which the boiler water is kept at a comparatively low temperature in order to reduce heat losses.
  • Such a low-temperature heating boiler is known from DE-A-36 04 842, in which, in addition to the heating gas train ending in the exhaust gas pipe, additional auxiliary heating gas trains are connected upstream in the flow direction for better energy utilization.
  • the invention has set itself the task of further developing low-temperature heating boilers in which condensation is avoided and at the same time an optimal use of energy is possible.
  • the entrances to the heating gas flue and the auxiliary heating gas flues are closed by flaps and have a positive control by means of which one flap is opened and the other flap is closed.
  • a certain part of the heating gas leaving the combustion chamber then flows through the auxiliary heating gas trains before reaching the (main) heating gas train and can give off additional energy there.
  • the result is better energy utilization and less heat loss through the fireplace.
  • the heating gas draft is to be understood as the duct that is connected directly upstream of the flue pipe leading to the chimney and through which the heating gases flow. It is therefore the last part of the boiler through which flow is seen in the direction of flow. Both the secondary and main throttle cable are surrounded by the primary circuit of the boiler jacket.
  • the entrances to the auxiliary heating gas flues and to the heating gas flue are closed by flaps close.
  • the user has the appropriate control whether the heating gases coming from the combustion chamber initially flow through the auxiliary heating gas flues or immediately through the (main) heating gas flue to the outside. Due to the forced control, the flap to the auxiliary heating gas flues can be closed and the other opened when starting. The result of this is that, when the main flue gas flap is fully open, rapid heating occurs in these areas, the dew point in the flue pipe and / or in the boiler water passes through and the optimum heating circuit temperature for the chimney can be reached quickly. No condensation can occur in the auxiliary heating gas flues that are cold during this period due to the lack of heating gases.
  • the flaps to the auxiliary heating gas flues open and the flaps to the main heating gas flue close, so that all heating gases are forced through the auxiliary heating gas flues and the heat absorption of the boiler water and consequently also the energy utilization is improved.
  • the flaps can be controlled, for example, using a thermostat.
  • a particularly preferred realization of the idea according to the invention consists in the use of two or more concentric tubes which are inserted from one end.
  • the inner serves as a heating gas pipe and the one or the outer, which represent cylindrical annular spaces, as auxiliary heating gas flues.
  • the auxiliary heating gas flues stand one below the other or with the heating gas flue on the front in connection with each other in such a way that when the inlet flap is opened, the auxiliary heating gas flue (s) first flows through and then the exhaust gases enter the (main) heating gas flue. A direct flow through the exhaust gases is then not possible.
  • the exhaust gases are immediately released to the outside via the (main) heating gas flue without the auxiliary heating gas flues being acted on.
  • the advantages of the proposed construction can be seen in the ease of cleaning, in which the tubes are pulled out and the chambers are accessible for cleaning.
  • the low-temperature heating boiler shown consists of a combustion chamber (1) in which the burner (2) is located and in which the heating gases flowing out according to the arrows are formed by combustion.
  • An inner tube (5) and an outer tube (6) are arranged coaxially in both the annular space (4) and the main heating gas train (3) to form the auxiliary heating gas trains (5), the inside in the main heating gas train (3) and the outside (6) engages in the annular space (4) at a distance from the outer walls.
  • the boiler water jacket is divided into a primary circuit (10) and a secondary circuit (11).
  • the primary circuit (10) operating at a higher temperature surrounds the combustion chamber (1), the (main) heating gas flue (3) and the auxiliary heating gas flues formed by the annular space (4). Only the primary circuit (10) is then immediately heated.
  • For heating the secondary circuit (11) there are two openings (12), one of which is in the form of a nozzle (13) which in turn engages in a nozzle (14) acted upon by the medium of the secondary circuit. This construction counteracts the tendency of the medium of the primary circuit (10) to escape from the opening (12) caused by thermal convection.
  • the other, here left opening (12) is the starting point of a connection having a controlled valve and a pump and opening into the secondary circuit (above and / or below). As a result, the amount of water flowing from the primary to the secondary circuit is adjusted; the other, right opening here only provides a compensation option.

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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)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Fire-Extinguishing Compositions (AREA)
  • Chimneys And Flues (AREA)
  • Control Of Combustion (AREA)

Abstract

To reduce condensation, it is proposed in the case of low temperature heating boilers to carry off the heating gases through a heating gas flue 3 and additional auxiliary heating gas flues which are closed by flaps and have a positive control by means of which, provided that one flap is open, the other is closed. <IMAGE>

Description

Die Erfindung bezieht sich auf einen Niedertemperaturheizkessel mit einer den Brenner aufnehmenden Brennkammer, einem nachgeschalteten, im Abgasrohr endenden Heizgaszug und einem umgebenden Kesselwassermantel, wobei neben dem ober- und/oder unterhalb der Brennkammer befindlichen Heizgaszug zusätzlich Nebenheizgaszüge in Strömungsrichtung gesehen vorgeschaltet sind.The invention relates to a low-temperature boiler with a burner-receiving combustion chamber, a downstream heating gas train ending in the exhaust pipe and a surrounding boiler water jacket, whereby in addition to the heating gas train located above and / or below the combustion chamber, additional heating gas trains are also connected upstream, as seen in the flow direction.

Bei den bekannten Zentralheizungsanlagen werden Niedertemperaturheizkessel der gattungsgemäßen Art eingesetzt. Ihre grundsätzliche Aufgabe besteht darin, das über den Brenner eingebrachte und gezündete Gas oder Öl als Wärme an das umgebende Kesselwasser abzugeben und in die Heizungsanlage einzuspeisen. Aus Gründen der Verbesserung der Energieausnutzung werden in jüngster Zeit immer mehr Niedertemperaturheizkessel eingesetzt, bei denen zur Verminderung der Wärmeverluste das Kesselwasser auf einer vergleichsweise niedrigen Temperatur gehalten wird. Aus der DE-A-36 04 842 ist ein derartiger Niedertemperaturheizkessel bekannt, bei welchem zur besseren Energieausnutzung neben dem im Abgasrohr endenden Heizgaszug zusätzliche Nebenheizgaszüge in Strömungsrichtung gesehen vorgeschaltet sind. Zur Erreichung einer hohen Lebensdauer ist von ausschlaggebender Bedeutung, daß eine Kondensation der Heizgase nicht eintritt. Bei Normaltemperaturkesseln wird zu diesem Zweck die Kesseltemperatur so gesteuert, daß sie oberhalb des Taupunktes der Heizgase zu liegen kommt. Bei Niedertemperaturkesseln hingegen müssen entsprechend aufwendige Vorkehrungen getroffen werden.In the known central heating systems, low-temperature boilers of the generic type are used. Their basic task is to transfer the gas or oil introduced and ignited via the burner as heat to the surrounding boiler water and to feed it into the heating system. For reasons of improving energy use, more and more low-temperature boilers have been used recently, in which the boiler water is kept at a comparatively low temperature in order to reduce heat losses. Such a low-temperature heating boiler is known from DE-A-36 04 842, in which, in addition to the heating gas train ending in the exhaust gas pipe, additional auxiliary heating gas trains are connected upstream in the flow direction for better energy utilization. In order to achieve a long service life, it is crucial that the heating gases do not condense. For normal temperature boilers, the boiler temperature is the same for this purpose controlled that it comes to lie above the dew point of the heating gases. In the case of low-temperature boilers, however, expensive precautions must be taken.

Hiervon ausgehend hat sich die Erfindung die Weiterentwicklung von Niedertemperaturheizkesseln zur Aufgabe gemacht, bei denen Kondensation vermieden und gleichzeitig eine optimale Energieausnutzung möglich wird.Proceeding from this, the invention has set itself the task of further developing low-temperature heating boilers in which condensation is avoided and at the same time an optimal use of energy is possible.

Gelöst wird diese Aufgabe erfindungsgemäß dadurch, daß die Eingänge zum Heizgaszug und den Nebenheizgaszügen über Klappen verschlossen sind und eine Zwangssteuerung aufweisen, durch die die eine Klappe geöffnet und die andere Klappe geschlossen wird. Ein gewisser Teil des die Brennkammer verlassenden Heizgases durchströmt dann vor Erreichen des (Haupt-) Heizgaszuges durch die Nebenheizgaszüge und kann dort zusätzlich Energie abgeben. Eine bessere Energieausnutzung und geringere Wärmeverluste über den Kamin ist das Ergebnis. Zur Klarstellung ist unter Heizgaszug der unmittelbar der zum Kamin führenden Abgasrohr vorgeschalteten und von den Heizgasen durchströmende Kanal zu verstehen. Es handelt sich also um den in Strömungsrichtung gesehenen letzten Teil des insgesamt durchströmten Heizkessels. Sowohl Neben- als auch Hauptgaszug sind vom primären Kreislauf des Kesselmantels umgeben.This object is achieved according to the invention in that the entrances to the heating gas flue and the auxiliary heating gas flues are closed by flaps and have a positive control by means of which one flap is opened and the other flap is closed. A certain part of the heating gas leaving the combustion chamber then flows through the auxiliary heating gas trains before reaching the (main) heating gas train and can give off additional energy there. The result is better energy utilization and less heat loss through the fireplace. For clarification, the heating gas draft is to be understood as the duct that is connected directly upstream of the flue pipe leading to the chimney and through which the heating gases flow. It is therefore the last part of the boiler through which flow is seen in the direction of flow. Both the secondary and main throttle cable are surrounded by the primary circuit of the boiler jacket.

Hierbei ist vorgesehen, die Eingänge zu den Nebenheizgaszügen und zum Heizgaszug über Klappen zu verschließen. Der Benutzer hat es durch entsprechende Steuerung in der Hand, ob die aus der Brennkammer herrührenden Heizgase zunächst durch die Nebenheizgaszüge oder sofort durch den (Haupt-) Heizgaszug nach außen strömen. Durch die Zwangsteuerung kann beim Anfahren die Klappe zu den Nebenheizgaszügen geschlossen und die andere geöffnet sein. Das hat zur Folge, daß während des Anfahrens also bei vollständig geöffneter Klappe des Hauptheizgaszuges, in diesen Bereichen eine rasche Erwärmung eintritt, der Taupunkt im Abgasrohr und/oder im Kesselwasser durchfahren und rasch die für den Kamin optimale Heizkreistemperatur erreicht werden kann. In den während dieser Periode kalten Nebenheizgaszügen kann aufgrund der nicht vorhandenen Heizgase keine Kondensation auftreten. Mit Erreichen einer gewissen Betriebstemperatur öffnen sich die Klappen zu den Nebenheizgaszügen und die zum Hauptheizgaszug schließen, so daß sämtliche Heizgase durch die Nebenheizgaszüge gezwungen und die Wärmeaufnahme des Kesselwassers und folglich auch die Energieausnutzung verbessert wird. Die Steuerung der Klappen kann beispielsweise über einen Thermostat vorgenommen werden.It is provided that the entrances to the auxiliary heating gas flues and to the heating gas flue are closed by flaps close. The user has the appropriate control whether the heating gases coming from the combustion chamber initially flow through the auxiliary heating gas flues or immediately through the (main) heating gas flue to the outside. Due to the forced control, the flap to the auxiliary heating gas flues can be closed and the other opened when starting. The result of this is that, when the main flue gas flap is fully open, rapid heating occurs in these areas, the dew point in the flue pipe and / or in the boiler water passes through and the optimum heating circuit temperature for the chimney can be reached quickly. No condensation can occur in the auxiliary heating gas flues that are cold during this period due to the lack of heating gases. When a certain operating temperature is reached, the flaps to the auxiliary heating gas flues open and the flaps to the main heating gas flue close, so that all heating gases are forced through the auxiliary heating gas flues and the heat absorption of the boiler water and consequently also the energy utilization is improved. The flaps can be controlled, for example, using a thermostat.

Eine besonders bevorzugte Realisierung des erfindungsgemäßen Gedankens besteht in der Verwendung zweier oder mehr konzentrischer Rohre, die von einer Stirnseite her eingesteckt sind. Das innere dient als Heizgasrohr und das oder die äußeren, die zylinderförmige Ringräume darstellen, als Nebenheizgaszüge. Die Nebenheizgaszüge stehen untereinander bzw. mit dem Heizgaszug an der Stirnseite miteinander derart in Verbindung, so daß bei entsprechend geöffneter Eingangsklappe zunächst der oder die Nebenheizgaszüge durchströmt und anschließend die Abgase in den (Haupt)-Heizgaszug gelangen. Eine direkte Anströmung desselben durch die Abgase ist dann nicht möglich. Bei Umschaltung durch die Zwangssteuerung gelangen die Abgase ohne Beaufschlagung der Nebenheizgaszüge sofort über den (Haupt-) Heizgaszug nach außen. Die Vorteile der vorgeschlagenen Konstruktion sind neben der Einfachheit der Herstellung in der leichten Durchführbarkeit der Reinigung zu sehen, bei der die Rohre herausgezogen und die Kammern zur Reinigung zugänglich werden.A particularly preferred realization of the idea according to the invention consists in the use of two or more concentric tubes which are inserted from one end. The inner serves as a heating gas pipe and the one or the outer, which represent cylindrical annular spaces, as auxiliary heating gas flues. The auxiliary heating gas flues stand one below the other or with the heating gas flue on the front in connection with each other in such a way that when the inlet flap is opened, the auxiliary heating gas flue (s) first flows through and then the exhaust gases enter the (main) heating gas flue. A direct flow through the exhaust gases is then not possible. When switching through the forced control, the exhaust gases are immediately released to the outside via the (main) heating gas flue without the auxiliary heating gas flues being acted on. In addition to the simplicity of manufacture, the advantages of the proposed construction can be seen in the ease of cleaning, in which the tubes are pulled out and the chambers are accessible for cleaning.

Einzelheiten und Vorteile der Erfindung lassen sich dem nachfolgenden Beschreibungsteil entnehmen, in dem anhand der Zeichnung ein Ausführungsbeispiel der Erfindung näher erläutert wird. Sie zeigt in schematischer Darstellung einen Querschnitt durch einen erfindungsgemäßen Niedertemperaturheizkessel in etwa entlang der Mittelachse.Details and advantages of the invention can be found in the following description, in which an embodiment of the invention is explained in more detail with reference to the drawing. It shows a schematic representation of a cross section through a low-temperature heating boiler according to the invention approximately along the central axis.

In an sich bekannter Weise besteht der gezeigte Niedertemperaturheizkessel aus einer Brennkammer (1), in der sich der Brenner (2) befindet und in der durch Verbrennung die entsprechend der Pfeile abströmenden Heizgase gebildet werden.In a manner known per se, the low-temperature heating boiler shown consists of a combustion chamber (1) in which the burner (2) is located and in which the heating gases flowing out according to the arrows are formed by combustion.

Unterhalb der Brennkammer (1) befinden sich der (Haupt-) Heizgaszug (3), durch den die Heizgase zu dem hier nicht dargestellten Abgasrohr sowie weiter zum Kamin geleitet werden. Es ist koaxial von einem zylindermantelförmigen Ringraum (4) umgeben, worin ein wesentlicher Kern vorliegender Ausführungsform besteht.Below the combustion chamber (1) there is the (main) heating gas flue (3) through which the heating gases are led to the exhaust pipe (not shown here) and further to the chimney. It is coaxially surrounded by a cylindrical jacket-shaped annular space (4), which is an essential core of the present embodiment.

Zur Bildung der Nebenheizgaszüge (5) sind sowohl in den Ringraum (4) als auch den Hauptheizgaszug (3) koaxial ein inneres Rohr (5) und ein äußeres Rohr (6) angebracht, wobei das Innere in den Hauptheizgaszug (3) und das Äußere (6) in den Ringraum (4) in Abstand zu den Außenwänden eingreift.An inner tube (5) and an outer tube (6) are arranged coaxially in both the annular space (4) and the main heating gas train (3) to form the auxiliary heating gas trains (5), the inside in the main heating gas train (3) and the outside (6) engages in the annular space (4) at a distance from the outer walls.

Auf diese Weise entstehen Strömungskanäle, durch die die Heizgase entsprechend der Pfeile strömen können, in der Weise, daß zunächst entlang dem äußeren Rohr (6) eine Strömung stattfindet, die an ihrem äußeren Ende umgeleitet und zurückgeführt wird, an der die gemeinsame Verbindung herstellenden Stirnseite (7) wiederum umgelenkt und an der Außenseite des inneren Rohres (5) nach außen abgeführt wird. In der soeben beschriebenen Weise strömt das Heizgas bei Beaufschlagung der Nebenheizgaszüge, wie sie bei geöffneter zugehöriger Klappe (8) erfolgt.In this way flow channels are formed through which the heating gases can flow in accordance with the arrows in such a way that initially a flow takes place along the outer tube (6), which is diverted and returned at its outer end, on the front side which makes the joint connection (7) again deflected and discharged to the outside on the outside of the inner tube (5). In the manner just described, the heating gas flows when the auxiliary heating gas flues are acted on, as occurs when the associated flap (8) is open.

Eine andere, hier nicht gezeigte Möglichkeit besteht darin, die Klappe (8) zu schließen, dafür die die Stirnseite des Innenrohres (5) verschließende Klappe (9) zu öffnen. Dann strömen die von der Brennkammer (1) kommenden Heizgase unmittelbar und vollständig in das Innere des Rohres (5) ein und werden von dort direkt nach außen geleitet. Die Wärmerückgewinnung ist dann naturgemäß vergleichsweise gering.Another possibility, not shown here, is to close the flap (8) by opening the flap (9) closing the end face of the inner tube (5). Then the heating gases coming from the combustion chamber (1) flow immediately and completely into the inside of the tube (5) and are led directly from there to the outside. The heat recovery is then naturally comparatively low.

Der Kesselwassermantel ist in einen primären Kreislauf (10) und einen sekundären Kreislauf (11) unterteilt. Der auf einer höheren Temperatur arbeitende primäre Kreislauf (10) umgibt die Brennkammer (1), den (Haupt-) Heizgaszug (3) sowie die durch den Ringraum (4) gebildeten Nebenheizgaszüge. Einzig der primäre Kreislauf (10) wird dann unmittelbar erhitzt. Zur Erwärmung des sekundären Kreislaufes (11) sind zwei Öffnungen (12) vorhanden, von der eine in Form eines Stutzens (13) realisiert ist, der seinerseits in einen vom Medium des Sekundärkreislaufes beaufschlagten Stutzen (14) eingreift. Der Tendenz zu der durch thermische Konvektion bewirkten Austritt des Mediums des Primärkreislaufes (10) aus der Öffnung (12) wird durch diese Konstruktion entgegengewirkt.The boiler water jacket is divided into a primary circuit (10) and a secondary circuit (11). The primary circuit (10) operating at a higher temperature surrounds the combustion chamber (1), the (main) heating gas flue (3) and the auxiliary heating gas flues formed by the annular space (4). Only the primary circuit (10) is then immediately heated. For heating the secondary circuit (11) there are two openings (12), one of which is in the form of a nozzle (13) which in turn engages in a nozzle (14) acted upon by the medium of the secondary circuit. This construction counteracts the tendency of the medium of the primary circuit (10) to escape from the opening (12) caused by thermal convection.

Die andere, hier linke Öffnung (12) ist Ausgangspunkt einer ein gesteuertes Ventil und eine Pumpe aufweisenden und in den sekundären Kreislauf (oben und/oder unten) einmündenden Verbindung. Hierdurch erfolgt die Einstellung der vom primären zum sekundären Kreislauf fließenden Wassermenge; die andere, hier rechte Öffnung sorgt nur für eine Ausgleichsmöglichkeit.The other, here left opening (12) is the starting point of a connection having a controlled valve and a pump and opening into the secondary circuit (above and / or below). As a result, the amount of water flowing from the primary to the secondary circuit is adjusted; the other, right opening here only provides a compensation option.

Claims (4)

1. Low temperature heating boiler having a combustion chamber housing the burner, a downstream heating gas flue ending in the exhaust pipe, and a surrounding boiler water jacket, whereby additional auxiliary heating gas flues are disposed upstream as seen in the direction of flow, next to heating-gas flue (3) disposed above and/or below the combustion chamber (1) wherein the inlets to said heating gas flue (3) and auxiliary heating gas flues are closed by flaps (8, 9) and have a forced control, by means of which one flap (8, 9) is opened and the other flap (9, 8) is closed.
2. Heating boiler according to claim 1 wherein at least two concentric pipes (5, 6) are inserted from one front side (7), whereby the inner (5) engages in said heating gas flue (3), and the outer pipe or pipes in jacket shaped annular chamber (4), and adjacent auxiliary heating gas flues are connected together or with said (main) heating gas flue (3).
3. Heating boiler according to claim 1 or 2 wherein upon start-up of said boiler, said flap (9) of said inner pipe (5) is open.
4. Heating boiler according to one of claims 1 to 3 wherein said heating gas flue is open during start-up, and the auxiliary heating gas flues opened only when the operating temperature is reached.
EP89904764A 1988-04-21 1989-04-21 Low-temperature heating boiler Expired - Lifetime EP0365640B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP91115427A EP0466207B1 (en) 1988-04-21 1989-04-21 Low temperature heating boiler
AT89904764T ATE73224T1 (en) 1988-04-21 1989-04-21 LOW TEMPERATURE BOILER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3813382 1988-04-21
DE3813382 1988-04-21

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP91115427.6 Division-Into 1991-09-12

Publications (2)

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EP0365640A1 EP0365640A1 (en) 1990-05-02
EP0365640B1 true EP0365640B1 (en) 1992-03-04

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EP89904764A Expired - Lifetime EP0365640B1 (en) 1988-04-21 1989-04-21 Low-temperature heating boiler
EP91115427A Expired - Lifetime EP0466207B1 (en) 1988-04-21 1989-04-21 Low temperature heating boiler

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Application Number Title Priority Date Filing Date
EP91115427A Expired - Lifetime EP0466207B1 (en) 1988-04-21 1989-04-21 Low temperature heating boiler

Country Status (5)

Country Link
EP (2) EP0365640B1 (en)
JP (1) JPH02503949A (en)
AT (1) ATE133776T1 (en)
DE (2) DE58909592D1 (en)
WO (1) WO1989010519A1 (en)

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ES2156689A1 (en) * 1998-12-11 2001-07-01 Vulcano Sadeca S A Hot water generator for operation at low temperature

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FI20035130A (en) * 2003-08-05 2005-02-06 Oilon Internat Oy Method and device to facilitate start of burner
CN111023569A (en) * 2019-11-07 2020-04-17 赵素真 Circulating condensation boiler

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Also Published As

Publication number Publication date
DE58900919D1 (en) 1992-04-09
EP0365640A1 (en) 1990-05-02
EP0466207B1 (en) 1996-01-31
JPH02503949A (en) 1990-11-15
WO1989010519A1 (en) 1989-11-02
ATE133776T1 (en) 1996-02-15
DE58909592D1 (en) 1996-03-14
EP0466207A1 (en) 1992-01-15

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