EP0559619B1 - Fireplace with primary and secondary air supply - Google Patents

Fireplace with primary and secondary air supply Download PDF

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Publication number
EP0559619B1
EP0559619B1 EP93810140A EP93810140A EP0559619B1 EP 0559619 B1 EP0559619 B1 EP 0559619B1 EP 93810140 A EP93810140 A EP 93810140A EP 93810140 A EP93810140 A EP 93810140A EP 0559619 B1 EP0559619 B1 EP 0559619B1
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EP
European Patent Office
Prior art keywords
air
combustion chamber
combustion
secondary air
primary
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EP93810140A
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German (de)
French (fr)
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EP0559619A1 (en
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Martin Frei
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
    • F24B1/00—Stoves or ranges
    • F24B1/18—Stoves with open fires, e.g. fireplaces
    • F24B1/185—Stoves with open fires, e.g. fireplaces with air-handling means, heat exchange means, or additional provisions for convection heating ; Controlling combustion
    • F24B1/189—Stoves with open fires, e.g. fireplaces with air-handling means, heat exchange means, or additional provisions for convection heating ; Controlling combustion characterised by air-handling means, i.e. of combustion-air, heated-air, or flue-gases, e.g. draught control dampers 
    • F24B1/19—Supplying combustion-air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
    • F24B5/00—Combustion-air or flue-gas circulation in or around stoves or ranges
    • F24B5/02—Combustion-air or flue-gas circulation in or around stoves or ranges in or around stoves
    • F24B5/021—Combustion-air or flue-gas circulation in or around stoves or ranges in or around stoves combustion-air circulation
    • F24B5/026—Supply of primary and secondary air for combustion

Definitions

  • the invention relates to a fireplace with a combustion chamber which is surrounded by side walls and a movable pane or door is present, with an ash container below the fire grate and with at least one supply line for the combustion air to be supplied to the combustion chamber, the combustion air in the form of primary and Secondary air can be supplied to the combustion chamber by a controllable throttle device, the primary air can be supplied from below through a channel of the combustion chamber and at least one vertical channel is available for the secondary air, which opens at its upper end into a transverse channel with an outlet opening.
  • FR-A-1 063 966 shows a furnace with a loading opening accessible from above, with a device for regulating the supply of combustion air to the fireplace.
  • the primary air is supplied to the grate from below through a duct and secondary air enters the interior of the combustion chamber through a duct located outside the combustion chamber at the top through horizontally directed outlet openings.
  • Such a stove is not designed for the generation of hot air for other rooms.
  • the supply of primary or secondary air can be influenced. Since no complete combustion is achieved with such an air duct, the supply of territorial air is provided.
  • FR-A-2 574 161 discloses a heating device in which the combustion air is subdivided by a partial flow penetrating the fire grate and another partial flow flowing upwards in separate channels. Afterburning is provided in the upper part of the heating device by means of an additionally branched-off air flow.
  • EP-A-0 480 870 which has not been previously published, shows a firing system of the type mentioned at the beginning, vertical ducts being arranged outside the combustion chamber and the ash container resting on an intermediate floor at a distance from the fire grate.
  • the object of the invention is to achieve an optimum supply of the combustion air into the combustion chamber in a fireplace of the type mentioned at the outset, in order to achieve a combustion process which is as uniform as possible and low in pollutants and has a high degree of efficiency.
  • the movable disc closes the front of the combustion chamber, for the supply of primary air to the combustion chamber there is a frame provided with air passage openings and surrounding the ash container at the top, the ash container with its outwardly protruding edge rests on the frame and the air passage openings of the frame open into a gap-shaped space below the slotted fire grate, which is arranged at least one vertical channel inside the combustion chamber and at the top ends in a transverse channel with obliquely downward outlet openings for supplying the secondary air from above into the combustion chamber.
  • the combustion process can be optimized, the efficiency can be maintained and the pollutant content can be optimized by the air flow, in which the primary air is metered from below to the fire grate via a gap-shaped space in a calm flow and the preheated, metered secondary air is fed from above to the combustion chamber reduce emissions.
  • slot-like openings 8 are provided on the front below the combustion chamber floor 13, which divide the combustion air into primary and secondary air. Behind these openings 8 there is a throttle device 10 with a slide 14 which has slots 23.
  • the slide 21 can be adjusted either manually or preferably in a time-controlled, motor-linear manner in the direction of the double arrow A in order to regulate the air supply into the combustion chamber 3 in terms of quantity and time.
  • the combustion air is divided into primary air 26 and secondary air 27 and is then fed to the metering device in separate channels 23, 24 of the combustion chamber 3.
  • the primary air 26 passes through a channel 24 into a space 21 and from there into a rectangular frame 16 which is open at the bottom and surrounds the ash container 18 all around. There are holes in the frame 16 or slots 32 are provided so that the primary air 26 can enter a flat, relatively low space 22 between the top of the ash container 18 and the fire grate 25.
  • the fire grate 25 there are several elongated openings 20 through which the primary air 26 is fed to the fireplace from below, as indicated by arrows C.
  • the fire grate 25 is designed such that its elongated openings 20 are delimited by square ribs 28 in the upright position.
  • the lumpy fuel for example wood, lies on top of the rib edges.
  • the space 21 in which the channel 24 for the primary air 26 opens is closed and sealed against the outside air.
  • the primary air 26 is forced to flow the frame 16 through the slots 32 essentially horizontally into the intermediate space 22 in order to subsequently reach the fireplace via the openings 20.
  • the ash container 18, which is open at the top, rests with its outwardly projecting edge on a cranked rag of the frame 16.
  • the supply of secondary air 27 for the combustion also takes place via the throttle device 10.
  • the secondary air 27 is conducted via two lateral channels 23 into vertical, vertical channels 30 which are arranged inside the combustion chamber 3. These two vertical channels 30 arranged near the front are connected to one another at their upper end by a horizontal transverse channel 34.
  • the transverse channel 34 is provided with outlet slots which are inclined downwards and from which the secondary air 27 can flow to the combustion chamber 3 from above. At least some of the slots arranged in the transverse channel can be directed against the pane 17 in order to direct the flue gases away from this pane 17. Since the vertical channels 30 and the transverse channel are inside the combustion chamber 3, the secondary air is in front of the Flowing out of the slots of the transverse channel 34 preheated, which favors the combustion process. Instead of two vertical channels 30, further vertical channels 30 could be present in the rear combustion chamber area. In the closed and sealed state of the panes 17 or the door, the combustion air is supplied exclusively by the throttle device (10) which can be metered by means of the slide 14, bypassing the opening which can be covered by the pane 17.
  • the opening cross sections of the throttle device 10 can be mechanically adapted to the chimney draft or the opening cross sections of the throttle device 10 for the combustion air can be regulated by electrical or electronic adjusting elements and thus adapted to the respective chimney draft.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Solid-Fuel Combustion (AREA)
  • Incineration Of Waste (AREA)
  • Treating Waste Gases (AREA)

Abstract

The combustion air is supplied to the combustion chamber (3) as primary air and secondary air via a throttling arrangement (10). A slide (21) provided with slots (23) is actuated either by hand or time-dependently by motor-moved adjustment members. The primary air is supplied via a frame to the underside of the furnace grate (25). The secondary air passes via two vertical ducts (30) arranged inside the combustion chamber (3) into a transverse duct (34), from which it flows out in a preheated state through slots downwards into the combustion chamber (3). As a result of this air guidance, the combustion process can be optimised, the harmful-substance content of the waste gases can be reduced and the efficiency can be improved. <IMAGE>

Description

Die Erfindung bezieht sich auf ein Cheminée mit einer Brennkammer die von Seitenwänden umgeben ist und eine bewegliche Scheibe oder Tür vorhanden ist, mit einem Aschenbehälter unterhalb des Feuerrostes und mit mindestens einer Zufuhrleitung für die der Brennkammer zuzuführenden Verbrennungsluft, wobei die Verbrennungsluft in Form von Primär und Sekundärluft durch eine steuerbare Drosseleinrichtung der Brennkammer zuführbar ist, die Primärluft durch einen Kanal der Brennkammer von unten her zuführbar ist und für die Sekundärluft mindestens ein Vertikalkanal vorhanden ist, der an seinem obern Ende in einen Querkanal mit Auslassöffnung einmündet.The invention relates to a fireplace with a combustion chamber which is surrounded by side walls and a movable pane or door is present, with an ash container below the fire grate and with at least one supply line for the combustion air to be supplied to the combustion chamber, the combustion air in the form of primary and Secondary air can be supplied to the combustion chamber by a controllable throttle device, the primary air can be supplied from below through a channel of the combustion chamber and at least one vertical channel is available for the secondary air, which opens at its upper end into a transverse channel with an outlet opening.

Um bei Cheminées eine möglichst schadstoffarme Verbrennung und einen hohen Wirkungsgrad zu erhalten, ist es notwendig, die der Brennkammer zugeführte Verbrennungsluft mengenmässig zu steuern und in Anpassung an den fortschreitenden Verbrennungsverlauf zu dosieren. Dabei kommt die Art der Luftzuführung zum Brenngut eine erhebliche Bedeutung zu, um einerseits ein Erlöschen der Flamme zu vermeiden und andererseits einen unnötig schnellen Abbrand mit Schadstoffbelastung der Rauchgase zu vermeiden.In order to obtain the most pollutant-free combustion possible and a high degree of efficiency, it is necessary to control the amount of combustion air supplied to the combustion chamber and to dose in adaptation to the progressive combustion process. The type of air supply to the firing material is of considerable importance, on the one hand to prevent the flame from extinguishing and on the other hand to avoid unnecessarily rapid combustion with pollution of the flue gases.

Die FR-A-1 063 966 zeigt einen Ofen mit von oben zugänglicher Beschickungsöffnung, mit einer Vorrichtung zur Regulierung der Zufuhr von Verbrennungsluft zur Feuerstelle. Die Primärluft wird über einen Kanal von unten her dem Rost zugeführt und Sekundärluft gelangt durch einen sich ausserhalb der Brennkammer befindlichen Kanal oben durch horizontal gerichtete Auslassöffnungen in das Innere der Brennkammer. Ein derartiger Ofen ist seiner Konzeption nach nicht für die Erzeugung von Warmluft für weitere Zimmer vorgesehen. Je nach Lage eines Drehschiebers lässt sich die Zufuhr von Primär- oder Sekundärluft beeinflussen. Da mit einer derartigen Luftführung keine vollständige Verbrennung zustande kommt, ist die Zufuhr von Territärluft vorgesehen.FR-A-1 063 966 shows a furnace with a loading opening accessible from above, with a device for regulating the supply of combustion air to the fireplace. The primary air is supplied to the grate from below through a duct and secondary air enters the interior of the combustion chamber through a duct located outside the combustion chamber at the top through horizontally directed outlet openings. Such a stove is not designed for the generation of hot air for other rooms. Depending on the position of a rotary valve, the supply of primary or secondary air can be influenced. Since no complete combustion is achieved with such an air duct, the supply of territorial air is provided.

Aus der FR-A-2 574 161 geht eine Heizeinrichtung hervor, bei der eine Unterteilung der Verbrennungsluft erfolgt, indem ein Teilstrom den Feuerrost durchdringt und ein anderer Teilstrom in getrennten Kanälen nach oben strömt. Im obern Teil der Heizeinrichtung ist eine Nachverbrennung durch einen zusätzlich abgezweigten Luftstrom vorgesehen.FR-A-2 574 161 discloses a heating device in which the combustion air is subdivided by a partial flow penetrating the fire grate and another partial flow flowing upwards in separate channels. Afterburning is provided in the upper part of the heating device by means of an additionally branched-off air flow.

Die nicht vorveröffentlichte EP-A-0 480 870 zeigt eine Feuerungsanlage der eingangs erwähnten Art, wobei Vertikalkanäle ausserhalb des Brennraumes angeordnet sind und der Aschenbehälter im Abstand vom Feuerrost auf einem Zwischenboden aufliegt.EP-A-0 480 870, which has not been previously published, shows a firing system of the type mentioned at the beginning, vertical ducts being arranged outside the combustion chamber and the ash container resting on an intermediate floor at a distance from the fire grate.

Mit der Erfindung soll die Aufgabe gelöst werden, bei einem Cheminées der eingangs erwähnten Art eine optimale Zufuhr der Verbrennungsluft in die Brennkammer zu erreichen, zur Erzielung eines möglichst gleichmässigen, schadstoffarmen Verbrennungsprozesses mit hohem Wirkungsgrad.The object of the invention is to achieve an optimum supply of the combustion air into the combustion chamber in a fireplace of the type mentioned at the outset, in order to achieve a combustion process which is as uniform as possible and low in pollutants and has a high degree of efficiency.

Diese Aufgabe wird dadurch gelöst, dass die bewegliche Scheibe die Brennkammer frontseitig abschliesst, für die Zufuhr von Primärluft zur Brennkammer ein mit Luftdurchtrittsöffnungen versehener, den Aschenbehälter oben umgebender Rahmen vorhanden ist, der Aschenbehälter mit seinem nach aussen abragenden Rand auf dem Rahmen aufliegt und die Luftdurchtrittsöffnungen des Rahmens in einen spaltförmigen Zwischenraum unterhalb des geschlitzten Feuerrostes einmünden, der mindestens eine Vertikalkanal im Innern der Brennkammer angeordnet ist und am obern Ende in einen Querkanal mit schräg nach unten gerichteten Auslassöffnungen einmündet zur Zufuhr der Sekundärluft von oben in die Brennkammer.This object is achieved in that the movable disc closes the front of the combustion chamber, for the supply of primary air to the combustion chamber there is a frame provided with air passage openings and surrounding the ash container at the top, the ash container with its outwardly protruding edge rests on the frame and the air passage openings of the frame open into a gap-shaped space below the slotted fire grate, which is arranged at least one vertical channel inside the combustion chamber and at the top ends in a transverse channel with obliquely downward outlet openings for supplying the secondary air from above into the combustion chamber.

Durch die Luftführung, bei welcher einerseits die Primärluft dosiert von unten dem Feuerrost über einen spaltförmigen Zwischenraum in beruhigter Strömung zugeführt wird und anderseits der Brennkammer von oben her vorgewärmte, dosierte Sekundärluft zugeführt wird, lässt sich der Verbrennungsvorgang optimieren, ein hoher Wirkungsgrad erhalten und den Schadstoffgehalt der Abgase verringern.The combustion process can be optimized, the efficiency can be maintained and the pollutant content can be optimized by the air flow, in which the primary air is metered from below to the fire grate via a gap-shaped space in a calm flow and the preheated, metered secondary air is fed from above to the combustion chamber reduce emissions.

In der Zeichnung ist ein Ausführungsbeispiel des Erfindungsgegenstandes dargestellt und wird nachfolgend näher beschrieben.In the drawing, an embodiment of the subject matter of the invention is shown and will be described in more detail below.

Es zeigen:

Fig. 1
eine perspektivische Ansicht eines Cheminées in schematischer Darstellung
Fig. 2
einen Querschnitt durch das Cheminée
Fig. 3
einen Schnitt nach der Linie III-III in Fig. 2
Fig. 4
einen Schnitt nach der Linie IV-IV in Fig. 2
Das Cheminée 1 gemäss Figur 1 enthält einen äusseren Stahlmantel 2 der Schamottsteine od. dgl. feuerfestes Material umgibt. Die Brennkammer 3 ist seitlich geschlossen und frontseitig durch eine Oeffnung zugänglich. Diese kann durch eine in einem Scheibenrahmen 4 gehaltene Scheibe 17 oder eine Tür überdeckt werden. Dieser Scheibenrahmen 4 samt Scheibe 17 ist in an sich bekannter Weise höhenverstellbar und vorzugsweise mit einem Gegengewicht versehen, sodass die Scheibe 17 leichtgängig vertikal verschiebbar ist. Bei Verwendung einer Tür kann diese um eine Vertikalachse schwenkbar sein.
Im Unterteil 11 befindet sich mindestens eine Oeffnung 5 für eine Luftzufuhr, die nach ihrer Erwärmung durch einen Wärmetauscher auf der Oberseite über zwei Warmluft-Austrittsöffnungen 6 austreten kann. Eine Kaminöffnung 7 dient für den Abzug der Rauchgase.Show it:
Fig. 1
a perspective view of a fireplace in a schematic representation
Fig. 2
a cross section of the fireplace
Fig. 3
a section along the line III-III in Fig. 2nd
Fig. 4
a section along the line IV-IV in Fig. 2nd
The fireplace 1 according to FIG. 1 contains an outer steel jacket 2 which surrounds firebricks or the like. Refractory material. The combustion chamber 3 is closed on the side and accessible from the front through an opening. This can be covered by a pane 17 held in a pane frame 4 or by a door. This pane frame 4 together with pane 17 can be adjusted in height in a manner known per se and is preferably provided with a counterweight, so that pane 17 can be easily vertically displaced. If a door is used, it can be pivotable about a vertical axis.
In the lower part 11 there is at least one opening 5 for an air supply which, after being heated by a heat exchanger on the upper side, can exit via two warm air outlet openings 6. A chimney opening 7 serves for the extraction of the flue gases.

Für eine zeitlich geregelte und dosierte Zufuhr von der Brennkammer zuzuführende Verbrennungsluft sind frontseitig unterhalb des Brennraumbodens 13 schlitzartige Oeffnungen 8 vorhanden, welche die Verbrennungsluft in Primär- und Sekundärluft aufteilt. Hinter diesen Oeffnungen 8 befinden sich einen Drosseleinrichtung 10 mit einem Schieber 14 der Schlitzen 23 aufweist. Der Schieber 21 ist entweder von Hand oder vorzugsweise zeitlich gesteuert motorisch linear in Richtung des Doppelpfeiles A verstellbar um die Luftzufuhr in die Brennkammer 3 mengenmässig und zeitabhängig zu regeln. Die Verbrennungsluft ist in Primärluft 26 und Sekundärluft 27 unterteilt und wird anschliessend an die Dosiereinrichtung in getrennten Kanälen 23, 24 der Brennkammer 3 zugeführt. Die Primärluft26 gelangt über einen Kanal 24 in einen Raum 21 und von dort in einen rechteckigen, unten offenen Rahmen 16, welcher den Aschenbehälter 18 oben ringsherum umgibt. Im Rahmen 16 sind Löcher oder Schlitze 32 vorhanden, sodass die Primärluft 26 in einen flachen, relativ niedrigen Zwischenraum 22 zwischen der Oberseite des Aschenbehälters 18 und dem Feuerrost 25 gelangen kann. Im Feuerrost 25 befinden sich mehrere längliche Oeffnungen 20 durch welche die Primärluft 26 der Feuerstelle von unten zugeführt wird, wie dies durch Pfeile C angedeutet ist. Der Feuerrost 25 ist so ausgebildet, dass seine länglichen Oeffnungen 20 durch Vierkantrippen 28 in Hochkantlage begrenzt sind. Das stückige Brennmaterial, beispielsweise Holz, liegt oben auf den Rippenkanten auf. Der Raum 21 in welchen der Kanal 24 für die Primärluft 26 einmündet ist geschlossen und gegen die Aussenluft abgedichtet. Somit ist die Primärluft 26 gezwungen, den Rahmen 16 über die Schlitze 32 im wesentlichen in Horizontalrichtung in den Zwischenraum 22 einzuströmen um hernach über die Oeffnungen 20 nach oben zur Feuerstelle zu gelangen. Der oben offene Aschenbehälter 18 liegt mit seinem nach aussen abragenden Rand auf einem abgekröpften Lappen des Rahmens 16 auf.
Auch die Zufuhr von Sekundärluft 27 für die Verbrennung erfolgt ebenfalls über die Drosseleinrichtung 10. Die Sekundärluft 27 wird über zwei seitliche Kanäle 23 in metallische, stehend angeordnete Vertikalkanäle 30 geleitet, welche innerhalb der Brennkammer 3 angeordnet sind. Diese zwei nahe der Frontseite angeordneten Vertikalkanäle 30 sind an ihrem oberen Ende durch einen horizontalen Querkanal 34 miteinander verbunden. Der Querkanal 34 ist mit nach unten geneigten Auslass-Schlitzen versehen, aus welchen die Sekundärluft 27 von oben her der Brennkammer 3 zuströmen kann. Mindestens einige der im Querkanal angeordneten Schlitze können gegen die Scheibe 17 gerichtet sein, um die Rauchgase von dieser Scheibe 17 wegzulenken. Da sich die Vertikalkanäle 30 und der Querkanal im Innern der Brennkammer 3 befinden, wird die Sekundärluft vor dem Ausströmen aus den Schlitzen des Querkanales 34 vorgewärmt, was den Verbrennungsprozess begünstigt. An Stelle von zwei Vertikalkanälen 30 könnten im hintern Brennkammerbereich weitere Vertikalkanäle 30 vorhanden sein.
Im geschlossenen und abgedichteten Zustand der Scheiben 17 bzw. der Tür erfolgt die Zufuhr der Verbrennungsluft ausschliesslich durch die mittels des Schiebers 14 dosierbaren Drosseleinrichtung (10) unter Umgehung der durch die Scheibe 17 überdeckbaren Oeffnung.For a time-controlled and metered supply of combustion air to be supplied from the combustion chamber, slot-like openings 8 are provided on the front below the combustion chamber floor 13, which divide the combustion air into primary and secondary air. Behind these openings 8 there is a throttle device 10 with a slide 14 which has slots 23. The slide 21 can be adjusted either manually or preferably in a time-controlled, motor-linear manner in the direction of the double arrow A in order to regulate the air supply into the combustion chamber 3 in terms of quantity and time. The combustion air is divided into primary air 26 and secondary air 27 and is then fed to the metering device in separate channels 23, 24 of the combustion chamber 3. The primary air 26 passes through a channel 24 into a space 21 and from there into a rectangular frame 16 which is open at the bottom and surrounds the ash container 18 all around. There are holes in the frame 16 or slots 32 are provided so that the primary air 26 can enter a flat, relatively low space 22 between the top of the ash container 18 and the fire grate 25. In the fire grate 25 there are several elongated openings 20 through which the primary air 26 is fed to the fireplace from below, as indicated by arrows C. The fire grate 25 is designed such that its elongated openings 20 are delimited by square ribs 28 in the upright position. The lumpy fuel, for example wood, lies on top of the rib edges. The space 21 in which the channel 24 for the primary air 26 opens is closed and sealed against the outside air. Thus, the primary air 26 is forced to flow the frame 16 through the slots 32 essentially horizontally into the intermediate space 22 in order to subsequently reach the fireplace via the openings 20. The ash container 18, which is open at the top, rests with its outwardly projecting edge on a cranked rag of the frame 16.
The supply of secondary air 27 for the combustion also takes place via the throttle device 10. The secondary air 27 is conducted via two lateral channels 23 into vertical, vertical channels 30 which are arranged inside the combustion chamber 3. These two vertical channels 30 arranged near the front are connected to one another at their upper end by a horizontal transverse channel 34. The transverse channel 34 is provided with outlet slots which are inclined downwards and from which the secondary air 27 can flow to the combustion chamber 3 from above. At least some of the slots arranged in the transverse channel can be directed against the pane 17 in order to direct the flue gases away from this pane 17. Since the vertical channels 30 and the transverse channel are inside the combustion chamber 3, the secondary air is in front of the Flowing out of the slots of the transverse channel 34 preheated, which favors the combustion process. Instead of two vertical channels 30, further vertical channels 30 could be present in the rear combustion chamber area.
In the closed and sealed state of the panes 17 or the door, the combustion air is supplied exclusively by the throttle device (10) which can be metered by means of the slide 14, bypassing the opening which can be covered by the pane 17.

Je nach Kaminhöhe können die Oeffnungsquerschnitte der Drosseleinrichtung 10 dem Kaminzug mechanisch angepasst werden oder die Oeffungsquerschnitte der Drosseleinrichtung 10 für die Verbrennungsluft lassen sich durch elektrische oder elektronische Verstellorgane regulieren und damit dem jeweiligen Kaminzug anpassen.Depending on the chimney height, the opening cross sections of the throttle device 10 can be mechanically adapted to the chimney draft or the opening cross sections of the throttle device 10 for the combustion air can be regulated by electrical or electronic adjusting elements and thus adapted to the respective chimney draft.

Claims (4)

  1. Fireplace having a combustion chamber (3) which is enclosed by side walls, and a movable panel (17) or door is provided, having an ash container beneath the grating (25) and having at least one feed line (23, 24) for the combustion air to be fed to the combustion chamber (3), it being possible for the combustion air to be fed in the form of primary and secondary air (26, 27) by a controllable throttle device (10) of the combustion chamber (3), it being possible for the primary air (26) to be fed by way of a duct to the combustion chamber (3) from below, and there being provided for the secondary air (27) at least one vertical duct (30) which opens, at its upper end, into a transverse channel (34) with an outlet opening, characterized in that the movable panel (14) closes off the combustion chamber (3) at the front, a frame (16) which is provided with air-passage openings (32) and encloses the ash container (18) at the top is provided for the feed of primary air to the combustion chamber (3), the ash container (18) bears on the frame (16) by means of its outwardly projecting border, and the air-passage openings (32) of the frame (16) open into a gap-like interspace (22) beneath the slotted grating (25), and the at least one vertical duct (30) is arranged in the interior of the combustion chamber (3) and, at the upper end, opens into a transverse channel (34) with obliquely downwardly directed outlet openings for the feed of the secondary air from the top into the combustion chamber (3).
  2. Fireplace according to Claim 1, characterized in that provision is made for two laterally arranged vertical ducts (30), in the vicinity of the front, which are connected to one another at the top for throughflow purposes by the transverse duct (34).
  3. Fireplace according to Claim 1 or 2, characterized in that at least some of the outlet openings arranged in the transverse duct (34) are designed as slots which are directed towards the panel (17).
  4. Fireplace according to one of Claims 1 to 3, characterized in that the elongate openings (20) of the slotted grating (25) are bounded by box-shaped ribs (28) which are positioned on edge.
EP93810140A 1992-03-05 1993-02-26 Fireplace with primary and secondary air supply Expired - Lifetime EP0559619B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH69992 1992-03-05
CH699/92 1992-03-05

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EP0559619A1 EP0559619A1 (en) 1993-09-08
EP0559619B1 true EP0559619B1 (en) 1995-10-25

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AT (1) ATE129557T1 (en)
DE (1) DE59300803D1 (en)

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FR2574161B2 (en) * 1983-03-18 1988-05-06 Telec 2000 DOMESTIC HEATING SYSTEM WITH A CLOSED FIREPLACE USING A SOLID FUEL OF THE WOOD TYPE OR DERIVATIVES THEREOF
US4856491A (en) * 1988-03-25 1989-08-15 Vermont Castings, Inc. High efficiency solid fuel burning stove
DK0480870T3 (en) * 1990-10-09 1994-09-26 Martin Frei combustion plants

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ATE129557T1 (en) 1995-11-15
EP0559619A1 (en) 1993-09-08
DE59300803D1 (en) 1995-11-30

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