EP0067383B1 - Fireplace with an opening to a furnace - Google Patents

Fireplace with an opening to a furnace Download PDF

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Publication number
EP0067383B1
EP0067383B1 EP82104910A EP82104910A EP0067383B1 EP 0067383 B1 EP0067383 B1 EP 0067383B1 EP 82104910 A EP82104910 A EP 82104910A EP 82104910 A EP82104910 A EP 82104910A EP 0067383 B1 EP0067383 B1 EP 0067383B1
Authority
EP
European Patent Office
Prior art keywords
combustion chamber
fresh air
chimney
chamber
tube system
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
EP82104910A
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German (de)
French (fr)
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EP0067383A1 (en
Inventor
Hans Aeberhard
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT82104910T priority Critical patent/ATE15937T1/en
Publication of EP0067383A1 publication Critical patent/EP0067383A1/en
Application granted granted Critical
Publication of EP0067383B1 publication Critical patent/EP0067383B1/en
Expired legal-status Critical Current

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Classifications

    • 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
    • F24B1/188—Stoves with open fires, e.g. fireplaces with air-handling means, heat exchange means, or additional provisions for convection heating ; Controlling combustion characterised by use of heat exchange means , e.g. using a particular heat exchange medium, e.g. oil, gas  
    • F24B1/1885—Stoves with open fires, e.g. fireplaces with air-handling means, heat exchange means, or additional provisions for convection heating ; Controlling combustion characterised by use of heat exchange means , e.g. using a particular heat exchange medium, e.g. oil, gas   the heat exchange medium being air only
    • 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
    • F24B1/1902—Supplying combustion-air in combination with provisions for heating air only

Definitions

  • the present invention relates to a heating fireplace with an opening to a combustion chamber, a chimney extractor and an additional flue gas duct system which crosses a fresh air space and which opens into the fresh air space from the combustion chamber and opens into the chimney extractor after the latter has been crossed.
  • Such a heating chimney has become known from EP-A-0 029 783.
  • the flue gas pipe system leaves the combustion chamber on the rear wall of the combustion chamber, runs upwards parallel to this rear wall and opens into the chimney hood above the combustion chamber.
  • the flue gas pipe system formed by pipes leading upwards is guided through a fresh air space behind said wall, through which fresh air flows, which is supplied to a room to be heated.
  • the flue gases are relatively short, which creates small contact areas between flue gas and fresh air and thus a relatively low efficiency of fresh air heating.
  • the present invention has as its object to improve the efficiency of such a heating fireplace.
  • a fireplace 1 with a sliding shutter that can be moved up and down is provided on the outside of a heating fireplace, with a chimney 9, in turn provided with a chimney closing flap 13.
  • the drive of the blind 11 and the flap 13 is coupled via an electric motor 15 in such a way that when the blind 11 is closed, the flap 13 is also closed, as indicated by dashed lines.
  • an opening 17b is provided, which opens into a cubic, transverse flue gas distributor 19. From the latter, four exchanger tubes 22a lead downwards and open there into a flue gas deflection space 24, from which four further exchanger tubes 22b lead past the flue gas distributor 19 upwards to a collector 23.
  • the latter is in turn connected to the chimney 9 by an opening 25b above the chimney closed position of the flap 13 (FIG. 2).
  • the space 28 surrounding the exchanger tubes 22a, 22b, the flue gas distributor 19, the deflection space 24 and the flue gas collector 23 is closed with a rear wall 27.
  • This space 28 communicates on the one hand via a feed opening 29 with a blower duct 31 arranged in the fireplace base, which in turn communicates with the surroundings via an opening 33.
  • a blower 35 is arranged therein.
  • the fresh air space 28 opens into exit pipes 37 for the heated fresh air FL.
  • a heating air supply 39 is also provided in the base of the fireplace, which communicates with the environment on the one hand via an opening that can be adjusted by means of a flap 41, and on the other hand opens into the combustion chamber 1 via an opening 43. If the flap 13 and the blind 11 are now moved into their closed position, the heating air flows through the duct 39, bypassing the closed blind 11, into the combustion chamber 1, as shown by the dashed arrow HL b , from there Flue gases are passed through the opening 17b, the distributor 19, the exchanger tubes 22a, the deflection chamber 24, the exchanger tubes 22b, the collector 23 and the opening 25b above the closed flap 13 back into the chimney 9. The surfaces, in particular the exchanger tubes 22a, b, are thus heated uniformly.
  • the fresh air to be heated is drawn in through the opening 33 with the aid of the blower 35, as shown in dash-dot lines, and passes through the opening 29 into the space 28, where it is heated accordingly along the hot exchanger tubes 22a, 22b, the distributor 19, and the deflection space 24 and the collector 23 grazes upwards, and is led away from there through the pipes 37.
  • the blind 11 is guided in guides on the upper part of the fireplace, as indicated schematically at 45.
  • FIGS. 1 and 2 schematically shows the control of the various adjustable organs on the fireplace according to FIGS. 1 and 2.
  • the blind 11 and the flap 13 on the chimney 9 are coupled coupled by means of the electric motor 15, so that when the blind 11 is closed, the flap 13 is also closed.
  • the flap 41 which controls the heating air inflow HL b when the blind 11 and the flap 13 are closed, is preferably controlled by means of a room thermostat 47.
  • the fan resp. the fan 35 which controls the supply of fresh air FL to be heated, can be manually adjusted in speed, as shown schematically with the potentiometer 49.
  • a thermal sensor 51 is arranged which alternatively or additionally controls the operation of the fan 35, ie increases the fresh air supply if the exchanger tubes threaten to exceed a prescribed temperature.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)
  • Glass Compositions (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Ventilation (AREA)

Abstract

1. Fire place with an open combustion chamber (1), a chimney breeching (9) and a fresh air chamber (28) traversed by an additional gas flue tube system (19, 22a, 22b, 23) which coming from the combustion chamber enters into the fresh air chamber and after having traversed it, discharging into the chimney breeching characterized in that - the gas flue tube system (19, 22a, 22b, 23) traverses meander-shaped the fresh air chamber (28) and that - a closable louver (11) for the opening of the combustion chamber and a hinged cover (13) for the chimney breeching (9) between the combustion chamber and the entrance of the gas flue tube system as well as - means for conducting the combustion air into the combustion chamber (1) bypassing the closable louver are forseen.

Description

Die vorliegende Erfindung betrifft ein Heiz-Cheminee mit einer Öffnung zu einem Feuerraum, einem Kaminabzug und einem einen Frischluftraum durchquerenden zusätzlichen Rauchgasleitungssystem, welches aus dem Feuerraum in den Frischluftraum ein- und nach dessen Durchquerung von letzterem in den Kaminabzug ausmündet.The present invention relates to a heating fireplace with an opening to a combustion chamber, a chimney extractor and an additional flue gas duct system which crosses a fresh air space and which opens into the fresh air space from the combustion chamber and opens into the chimney extractor after the latter has been crossed.

Aus der EP-A-0 029 783 ist ein derartiges Heiz-Cheminee bekanntgeworden. Das Rauchgas- Leitungssystem verläßt den Feuerraum an der Feuerraum-Hinterwand, ist parallel zu dieser Hinterwand nach oben geführt und mündet oberhalb des Feuerraumes in den Kaminabzug ein. Das durch nach oben geführte Rohre gebildete Rauchgas-Leitungssystem ist dabei durch einen Frischluftraum hinter besagter Wand geführt, welcher frischluftdurchströmt ist, die einem zu beheizenden Raum zugeführt wird. Aus Gründen des Strömungswiderstandes der durch die Rohre freiströmenden Rauchgase sind letztere relativ kurz ausgebildet, wodurch kleine Kontaktflächen zwischen Rauchgas und Frischluft entstehen und somit ein relativ geringer Wirkungsgrad der Frischluftbeheizung.Such a heating chimney has become known from EP-A-0 029 783. The flue gas pipe system leaves the combustion chamber on the rear wall of the combustion chamber, runs upwards parallel to this rear wall and opens into the chimney hood above the combustion chamber. The flue gas pipe system formed by pipes leading upwards is guided through a fresh air space behind said wall, through which fresh air flows, which is supplied to a room to be heated. For reasons of the flow resistance of the flue gases flowing freely through the pipes, the flue gases are relatively short, which creates small contact areas between flue gas and fresh air and thus a relatively low efficiency of fresh air heating.

Ausgehend von einem Heiz-Cheminee obengenannter Art stellt sich die vorliegende Erfindung die Aufgabe, den wirkungsgrad eines derartigen Heiz-Cheminees zu verbessern.Starting from a heating fireplace of the type mentioned above, the present invention has as its object to improve the efficiency of such a heating fireplace.

Dies wird durch Ausbildung nach dem Wortlaut des Anspruchs 1 erreicht.This is achieved by training according to the wording of claim 1.

Die Erfindung wird anschließend beispielsweise anhand von Figuren erläutert. Es zeigt

  • Fig. 1 eine perspektivische Rückansicht eines erfindungsgemäßen Cheminees,
  • Fig. 2 einen schematischen Querschnitt durch das Cheminee gemäß Fig. 1,
  • Fig. 3 eine schematische Darstellung der vorgesehenen Einstell- und Steuermöglichkeiten am Cheminee gemäß den Fig. 1 und 2.
The invention is subsequently explained, for example, using figures. It shows
  • 1 is a rear perspective view of a fireplace according to the invention,
  • 2 shows a schematic cross section through the fireplace according to FIG. 1,
  • 3 shows a schematic illustration of the proposed setting and control options on the fireplace according to FIGS. 1 and 2.

In den Fig. 1 und 2 ist an einem Heiz-Cheminee ein Feuerraum 1 mit einer auf- und abverschieblichen Jalousie gegen außen verschließbar vorgesehen, mit einem Kamin 9, seinerseits mit einer Kaminverschließklappe 13 versehen. Der Antrieb der Jalousie 11 und der Klappe 13 erfolgt dabei über einen Elektromotor 15 gekoppelt, derart, daß bei geschlossener Jalousie 11 auch die Klappe 13, wie gestrichelt angedeutet, verschlossen ist. An einer Rückwand 5 des Feuerraumes 1 ist eine Öffnung 17b vorgesehen, welche in einen kubischen, querliegenden Rauchgasverteiler 19 einmündet. Von letzterem führen, parallel, vier Austauscherrohre 22a nach unten und münden dort in einen Rauchgasumlenkraum 24 ein, von welchem vier weitere Austauscherrohre 22b am Rauchgasverteiler 19 vorbei nach oben zu einem Sammler 23 führen. Letzterer ist wiederum mit einer Öffnung 25b mit dem Kamin 9 verbunden und zwar oberhalb der Kamin-Schließposition der Klappe 13 (Fig. 2). Der die Austauscherrohre 22a, 22b, den Rauchgasverteiler 19, den Umlenkraum 24 sowie den Rauchgassammler 23 umgebende Raum 28 ist mit einer Rückwand 27 verschlossen. Dieser Raum 28 kommuniziert einerseits über eine Zuführöffnung 29 mit einem im Cheminee-Sockel angeordneten Gebläsekanal 31, der seinerseits über eine Öffnung 33 mit der Umgebung kommuniziert. Darin ist ein Gebläse 35 angeordnet. Oben mündet der Frischluftraum 28 in Wegführrohre 37 für die beheizte Frischluft FL ein. Im Cheminee-Sockel ist weiter eine Heizluftzuführung 39 vorgesehen, die einerseits über eine mittels einer Klappe 41 verstellbare Öffnung mit der Umgebung kommuniziert, anderseits über eine Öffnung 43 in den Feuerraum 1 einmündet. Werden nun die Klappe 13 und die Jalousie 11 in ihre verschlossene Position gefahren, so strömt, wie mit dem gestrichelt dargestellten Pfeil HLb dargestellt, die Heizluft über den Kanal 39, unter Umgehung der geschlossenen Jalousie 11, in den Feuerraum 1. Von dort werden Rauchgase durch die Öffnung 17b, den Verteiler 19, die Austauscherrohre 22a, den Umlenkraum 24, die Austauscherrohre 22b, den Sammler 23 und die Öffnung 25b oberhalb der geschlossenen Klappe 13 wieder in den Kamin 9 geleitet. Damit werden die Oberflächen, insbesondere der Austauscherrohre 22a, b gleichmäßig erhitzt. Die zu beheizende Frischluft wird mit Hilfe des Gebläses 35, wie strichpunktiert dargestellt, durch die Öffnung 33 eingesaugt und gelangt durch die Öffnung 29 in den Raum 28, wo sie unter entsprechender Erhitzung entlang der heißen Austauscherrohre 22a, 22b, des Verteilers 19, des Umlenkraumes 24 und des Sammlers 23 nach oben streift, und von dort durch die Rohre 37 weggeführt wird. Die Jalousie 11 wird dabei am oberen Teil des Cheminees, wie mit 45 schematisch angedeutet, in Führungen geführt.1 and 2, a fireplace 1 with a sliding shutter that can be moved up and down is provided on the outside of a heating fireplace, with a chimney 9, in turn provided with a chimney closing flap 13. The drive of the blind 11 and the flap 13 is coupled via an electric motor 15 in such a way that when the blind 11 is closed, the flap 13 is also closed, as indicated by dashed lines. On a rear wall 5 of the combustion chamber 1, an opening 17b is provided, which opens into a cubic, transverse flue gas distributor 19. From the latter, four exchanger tubes 22a lead downwards and open there into a flue gas deflection space 24, from which four further exchanger tubes 22b lead past the flue gas distributor 19 upwards to a collector 23. The latter is in turn connected to the chimney 9 by an opening 25b above the chimney closed position of the flap 13 (FIG. 2). The space 28 surrounding the exchanger tubes 22a, 22b, the flue gas distributor 19, the deflection space 24 and the flue gas collector 23 is closed with a rear wall 27. This space 28 communicates on the one hand via a feed opening 29 with a blower duct 31 arranged in the fireplace base, which in turn communicates with the surroundings via an opening 33. A blower 35 is arranged therein. At the top, the fresh air space 28 opens into exit pipes 37 for the heated fresh air FL. A heating air supply 39 is also provided in the base of the fireplace, which communicates with the environment on the one hand via an opening that can be adjusted by means of a flap 41, and on the other hand opens into the combustion chamber 1 via an opening 43. If the flap 13 and the blind 11 are now moved into their closed position, the heating air flows through the duct 39, bypassing the closed blind 11, into the combustion chamber 1, as shown by the dashed arrow HL b , from there Flue gases are passed through the opening 17b, the distributor 19, the exchanger tubes 22a, the deflection chamber 24, the exchanger tubes 22b, the collector 23 and the opening 25b above the closed flap 13 back into the chimney 9. The surfaces, in particular the exchanger tubes 22a, b, are thus heated uniformly. The fresh air to be heated is drawn in through the opening 33 with the aid of the blower 35, as shown in dash-dot lines, and passes through the opening 29 into the space 28, where it is heated accordingly along the hot exchanger tubes 22a, 22b, the distributor 19, and the deflection space 24 and the collector 23 grazes upwards, and is led away from there through the pipes 37. The blind 11 is guided in guides on the upper part of the fireplace, as indicated schematically at 45.

In Fig. 3 ist schematisch die Steuerung der verschiedenen verstellbaren Organe am Cheminee gemäß den Fig. 1 und 2 dargestellt. Die Jalousie 11 und die Klappe 13 am Kamin 9 werden mittels des Elektromotors 15 gekoppelt angetrieben, so daß bei geschlossener Jalousie 11 auch die Klappe 13 geschlossen ist.3 schematically shows the control of the various adjustable organs on the fireplace according to FIGS. 1 and 2. The blind 11 and the flap 13 on the chimney 9 are coupled coupled by means of the electric motor 15, so that when the blind 11 is closed, the flap 13 is also closed.

Die Klappe 41, welche den Heizluftzustrom HLb bei geschlossener Jalousie 11 und Klappe 13 steuert, wird vorzugsweise mittels eines Raumthermostaten 47 gesteuert. Der Ventilator resp. das Gebläse 35, der bzw. das die Zuführung von zu beheizender Frischluft FL steuert, kann manuell, wie schematisch mit dem Potentiometer 49 dargestellt, drehzahlverstellt werden. Vorzugsweise ist jedoch zur Verhinderung einer Überhitzung der Austauscherrohre 22a, 22b bzw. des Verteilers 19, des Umlenkraumes 24 und des Sammlers 23 im Bereich letzterer ein Thermofühler 51 angeordnet, der alternativ oder zusätzlich den Betrieb des Ventilators 35 steuert, d. h. die Frischluftzufuhr erhöht, falls die Austauscherrohre eine vorgeschriebene Temperatur zu überschreiten drohen.The flap 41, which controls the heating air inflow HL b when the blind 11 and the flap 13 are closed, is preferably controlled by means of a room thermostat 47. The fan resp. the fan 35, which controls the supply of fresh air FL to be heated, can be manually adjusted in speed, as shown schematically with the potentiometer 49. However, in order to prevent overheating of the exchanger tubes 22a, 22b or the distributor 19, the deflection space 24 and the collector 23 in the region of the latter, a thermal sensor 51 is arranged which alternatively or additionally controls the operation of the fan 35, ie increases the fresh air supply if the exchanger tubes threaten to exceed a prescribed temperature.

Mit dem beschriebenen Heiz-Cheminee wird eine wesentliche Erhöhung des Heizwirkungsgrades erzielt, indem zwischen den heißen Rauchgasen und der zu beheizenden Frischluft große Austauscherflächen realisiert werden. Dabei werden die Rauchgase trotz des erhöhten Strömungswiderstandes im zusätzlich vorgesehenen Leitungssystem gezwungen, dieses zu durchströmen.With the heating fireplace described, there is a significant increase in the heating effect Degree achieved by realizing large exchanger surfaces between the hot flue gases and the fresh air to be heated. Despite the increased flow resistance in the additionally provided pipe system, the flue gases are forced to flow through it.

Claims (6)

1. Fire place with an open combustion chamber (1), a chimney breeching (9) and a fresh air chamber (28) traversed by an additional gas flue tube system (19, 22a, 22b, 23) which coming from the combustion chamber enters into the fresh air chamber and after having traversed it, discharging into the chimney breeching characterized in that
- the gas flue tube system (19, 22a, 22b, 23) traverses meander-shaped the fresh air chamber (28) and that
- a closable louver (11) for the opening of the combustion chamber and a hinged cover (13) for the chimney breeching (9) between the combustion chamber and the entrance of the gas flue tube system as well as
- means for conducting the combustion air into the combustion chamber (1) bypassing the closable louver are forseen.
2. Fire place according to claim 1, characterized by a fan (35) for pressing the fresh air through the fresh air chamber (28).
3. Fire place according to claim 1 or 2, characterized in that the louver (11) and the hinged cover (13) are coupled in respect to movement, preferably motor-driven.
4. Fire place according to one of the claims 1 to 3, characterized in that the gas flue tube system has an opening (17b) into the upper part of the combustion chamber (1) and that, starting therefrom at least two tubes (22a) conduct first downwards then (22b) upwards to an opening (25b) above the hinged cover (13) discharging into the chimney breeching (9).
5. Fire place according to one of the claims 1 to 4, characterized in that the means for conducting the combustion air bypassing the closable louver (11) comprise with an adjusting flap (41), preferably controlled by a chamber-thermostat (47).
6. Fire place according to claim 2, characterized in that the fan (35) is controlled manually (49) and/or by a thermo-feeler (51) at the gas flue tube system (22a, 22b).
EP82104910A 1981-06-15 1982-06-04 Fireplace with an opening to a furnace Expired EP0067383B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82104910T ATE15937T1 (en) 1981-06-15 1982-06-04 HEATED CHIMNEY WITH AN OPENING TO A FIREPLACE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH392181 1981-06-15
CH3921/81 1981-06-15

Publications (2)

Publication Number Publication Date
EP0067383A1 EP0067383A1 (en) 1982-12-22
EP0067383B1 true EP0067383B1 (en) 1985-10-02

Family

ID=4266355

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82104910A Expired EP0067383B1 (en) 1981-06-15 1982-06-04 Fireplace with an opening to a furnace

Country Status (3)

Country Link
EP (1) EP0067383B1 (en)
AT (1) ATE15937T1 (en)
DE (2) DE8215086U1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2551845B2 (en) * 1983-03-18 1988-04-22 Telec 2000 DOMESTIC HEATING SYSTEM WITH A CLOSED FIREPLACE USING A SOLID FUEL OF THE WOOD TYPE OR DERIVATIVES THEREOF
FR2542849B1 (en) * 1983-03-18 1985-12-13 Telec 2000 DOMESTIC HEATING SYSTEM WITH A CLOSED FIREPLACE USING A SOLID FUEL OF THE WOOD TYPE OR DERIVATIVES THEREOF
AU587329B2 (en) * 1986-12-20 1989-08-10 William Roger Court Domestic heat exchanger
BE1003452A3 (en) * 1987-11-06 1992-03-31 Gerofina Sa PERIMETRIC RECOVERY OF GASES AND FUMES EMITTED BY A HEATING BODY.
FR2660052B1 (en) * 1990-03-22 1996-07-12 David Jean Pierre PULSE AIR CHIMNEY BOILER AND THREE - WAY DRAWING USING A PARABOLIC FIREPLACE ROOM.
DE10200430A1 (en) * 2002-01-09 2003-07-17 Christian Born Warmluftofen
DE102008005427B3 (en) * 2008-01-21 2009-04-23 Spartherm Feuerungstechnik Gmbh Fireplace insert for use as fitting element for e.g. masonry heater, has hot air chamber connected to convection air nozzles, where air coming from air distributing blower and air supplied to hot air chamber are commonly supplied to nozzles
DE102019005109A1 (en) * 2019-07-23 2021-01-28 Karl Stefan Riener OVEN WITH VERTICALLY MOVABLE COMBUSTION CHAMBER

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2832332A (en) * 1953-12-22 1958-04-29 Hugo C Johnson Combination fireplace and furnace
GB857191A (en) * 1956-04-17 1960-12-29 Alexander Dunn Ltd Improvements relating to fire-places
FR2349797A1 (en) * 1976-04-27 1977-11-25 Delourme Hyacinthe Open fireplace for heating occupied rooms - has insert behind chimney breast to extract and store heat from gases
US4292952A (en) * 1979-08-16 1981-10-06 Mcdonald Charles B Fireplace furnace
FR2472721A1 (en) * 1979-11-27 1981-07-03 Granifeu Sa CALORIE RECOVERY DEVICE IN OPEN HOUSE FIREPLACES

Also Published As

Publication number Publication date
ATE15937T1 (en) 1985-10-15
EP0067383A1 (en) 1982-12-22
DE3266657D1 (en) 1985-11-07
DE8215086U1 (en) 1983-06-16

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