EP2761228A1 - Oven - Google Patents

Oven

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Publication number
EP2761228A1
EP2761228A1 EP12761876.7A EP12761876A EP2761228A1 EP 2761228 A1 EP2761228 A1 EP 2761228A1 EP 12761876 A EP12761876 A EP 12761876A EP 2761228 A1 EP2761228 A1 EP 2761228A1
Authority
EP
European Patent Office
Prior art keywords
heat
heating circuit
baking chamber
baking
circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP12761876.7A
Other languages
German (de)
French (fr)
Other versions
EP2761228B1 (en
Inventor
Helmut GRAGGER
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP2761228A1 publication Critical patent/EP2761228A1/en
Application granted granted Critical
Publication of EP2761228B1 publication Critical patent/EP2761228B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C9/00—Stoves or ranges heated by a single type of energy supply not covered by groups F24C3/00 - F24C7/00 or subclass F24B
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/34—Elements and arrangements for heat storage or insulation

Definitions

  • the invention relates to an oven with a baking chamber, with a connected to a heat storage heating circuit for the oven and a connected to a solar collector charging circuit for the heat storage.
  • the charging circuit connected to the solar collector can also be connected directly to the heating circuit for the stove.
  • a disadvantage of This known system for operating a stove by using solar energy is mainly the construction effort. Apart from that, in the case of ovens, in particular for commercial or industrial use, with regard to the heat balance, requirements which are generally not met in ovens having a baking chamber for domestic use are to be met.
  • the invention is therefore based on the object, an oven with a baking chamber of the type described in such a way that it corresponds to the requirements placed on ovens for commercial and industrial use in terms of heat balance, with a relatively low construction costs.
  • the invention solves the problem set by the fact that the heat storage and the oven provided above the heat storage chamber are arranged in a thermally insulated housing and that the heating circuit is laid on a fireclay lining of the oven.
  • the arrangement of the baking chamber immediately above the heat storage not only ensures an advantageous, compact design, but also takes into account that the baking chamber can absorb the radiated heat from the heat storage.
  • a distribution of the heat emitted by the fireclay lining which is advantageous for applying heat to the baking chamber, is achieved when the heating circuit in the fireclay lining is laid on the side facing away from the baking chamber, so that the sum of these measures results in a for a particular commercial and industrial use characterized time operation of the oven advantageous heat balance while maintaining comparatively simple structural measures can be achieved.
  • the heat load of the oven can be adapted to the baking conditions advantageous, the oven can have a vault in the usual way, run on the fireclay lining between a manifold and a manifold parallel heating cables of the heating circuit. This measure effects uniform heat radiation over the entire cooking chamber length in the direction of the vault axis. If necessary, but can of course also be guided through the bottom of the baking chamber, a portion of the heating circuit, which is preferably controlled separately, to be able to apply the baking chamber with an adapted to the case of need upper and lower heat.
  • the charging circuit may comprise at least one provided in the bottom region of the heat storage pipe coil for the heat transfer of the charging circuit, so that can form a temperature stratification within the liquid heat storage medium of the heat storage, the use of the respective Maximum temperature of the heat accumulator allowed for the heating circuit when the heating circuit has at least one provided in the ceiling region of the heat accumulator line coil for the heat transfer medium of the heating circuit.
  • the separate from the heat storage medium heat transfer medium for the heating circuit represents a security that can not be contaminated by the heat storage medium of the heat storage of the oven even with a leak of the heating circuit, and on the other hand offers the advantage of heat removal, without the stratification of the heat transfer medium within the heat storage sustainable to destroy, as would be the case when the heat storage medium is used as a heat transfer medium for the heating circuit.
  • the heating circuit bypassing the heat storage of the heating circuit for a baking chamber can be acted upon by a heated by the solar heat transfer medium, the heating circuit can be optionally connected to the charging circuit.
  • the heat accumulator may have an additional heating, which allows the required for a baking operation temperature level within the heat storage even in adverse external circumstances.
  • This additional heating preferably also a heat exchanger, can be supplied with energy in very different ways. It is only important that in an emergency, the oven does not need to be taken out of service.
  • Fig. 1 shows a baking oven according to the invention in a schematic block diagram
  • Fig. 2 shows the oven schematically in a frontal view on a larger scale.
  • the oven shown schematically in Figs. 1 and 2 has a provided with a fireclay lining 1 baking chamber 2, which is provided at its front end with a control opening 3, as can be seen in particular of FIG. 1, the oven in a schematic longitudinal section shows.
  • the fireclay lining 1 forms according to FIG. 2 in the usual way a vault 4, which is supported by a bottom plate 5.
  • the baking chamber 2 is placed on a heat accumulator 6 whose container 7 is together with the baking chamber 2 in a common, heat-insulated Einhau- 8 is arranged.
  • the housing 8 from a container 7 of the heat accumulator 6 receiving lower part 9 and an upper part 10 is constructed, wherein the arrangement is made such that the bottom plate 5 of the baking chamber 2 the lower part 9 with the container 7 of the heat storage device 6 after closes at the top and the upper part 10 is placed on the over the fireclay lining 1 of the baking chamber 2 projecting bottom plate 5.
  • the heat accumulator 6 is charged via a charging circuit 12 provided with a charge pump 11, which is connected to the collector circuit 14 of a solar collector 15 via a heat exchanger 13.
  • the pump for the collector circuit 14 is designated 16.
  • the solar collector 15 itself has in a conventional manner a cross-sectionally parabolic reflector pan 17 and an absorber tube 18 in the focal axis of the reflector pan 17, so that the bundled in the absorber tube 18, reflected heat radiation of the sun for a sufficient temperature of the heat carrier of the collector circuit 14th ensures that it can supply an oven with heat energy.
  • the charging circuit 12 forms within the container 7 for the heat storage 6, a heat exchanger in the form of at least one provided in the bottom region of the heat accumulator 6 line coil 19 which is laid meandering over the container bottom, so that the heat storage 6 applied uniformly over the entire bottom region of the container 7 with heat can be.
  • the heat of the charging circuit 13 receiving heat storage medium is provided, via which the stored heat can be delivered to a heating circuit 20 for the oven 2.
  • the provided with a heating pump 21 heating circuit 20 forms in the ceiling region of the container 7 of the heat accumulator 6, in turn meandering laid pipe coil 22 as a heat exchanger.
  • the heat carrier for the heating circuit 20 is heated, comprising the heating lines 23 for the baking chamber 2.
  • These heating lines 23 are each between a distribution line 24 along the bottom plate 5 and a manifold 25 along the vertex of the vault 4 of the baking chamber 2 connected in parallel, so that the baking chamber 2 can be acted upon uniformly over its extending in the direction of the vault axis length with heat.
  • the baking temperature can be controlled within the baking chamber 2.
  • the heat storage 6 is equipped with an auxiliary heater 26 in the form of a dash-dotted line indicated heat exchanger.
  • the baking chamber 2 is arranged with its fireclay lining 1 and laid on the outside of the fireclay lining 1 heating cables 23 within a common, heat-insulated housing 8 together with the heat storage 6 and placed on the container 7 of the heat accumulator 6, structurally comparatively simple, den Heat conditions advantageous bill-bearing design conditions that allow the use of solar energy for ovens in commercial and industrial use with a relatively high efficiency without having to do without sufficient control of the heat supply to the oven 2.
  • the block diagram of FIG. 1 illustrates only the basic line connections and, for example, does not show the expansion tank, control valves and control units for reasons of clarity.
  • the quite meaningful connection between the charging circuit 12 and the heating circuit 20 is neglected to operate the baking chamber 2, bypassing the heat accumulator 6 optionally on the solar panel 15 can.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

A description is given of an oven having a baking chamber (2), having a heating circuit (20) for the baking chamber (2), the heating circuit being connected to a heat accumulator (6), and having a charging circuit (12) for the heat accumulator (6), the charging circuit being connected to a solar collector (15). In order to create advantageous design conditions, the heat accumulator (6) and the baking chamber (2), which is provided above the heat accumulator (6), are arranged in a heat‑insulated housing (8), and the heating circuit (20) is laid out on a fireclay lining (1) of the baking chamber (2).

Description

Backofen  oven
Technisches Gebiet Technical area
Die Erfindung bezieht sich auf einen Backofen mit einem Backraum, mit einem an einen Wärmespeicher angeschlossenen Heizkreis für den Backraum und mit einem an einen Sonnenkollektor angeschlossenen Ladekreis für den Wärmespeicher. The invention relates to an oven with a baking chamber, with a connected to a heat storage heating circuit for the oven and a connected to a solar collector charging circuit for the heat storage.
Stand der Technik State of the art
Um Sonnenenergie für die Energieversorgung eines Herdes mit einem Backraum vorteilhaft nützen zu können, ist es bekannt (EP 0 593 649 B1 ), einen über einen Sonnenkollektor ladbaren Wärmespeicher vorzusehen, der vorzugsweise einen mit Stahlkugeln gefüllten, mit einem Wärmeträger beaufschlagbaren Behälter umfasst, sodass für den Heizkreis des Herdes Wärmeenergie unabhängig vom Sonnenstand zur Verfügung gestellt werden kann. Mit Hilfe entsprechender Steuerventile kann der Wärmespeicher durch eine Beaufschlagung mit dem im Sonnenkollektor erwärmten Wärmeträger geladen oder zum Heizen des Herdes über den Heizkreis entladen werden, über den der warme Wärmeträger durch den Herd gefördert wird. Durch eine Steuerung der Strömungsgeschwindigkeit kann dabei die Heizleistung für den Herd den jeweiligen Betriebsbedingungen angepasst werden. Um den im Sonnenkollektor erwärmten Wärmeträger auch unmittelbar für den Betrieb des Herdes nützen zu können, kann der an den Sonnenkollektor angeschlossene Ladekreis auch unmittelbar mit dem Heizkreis für den Herd verbunden werden. Nachteilig bei dieser bekannten Anlage zum Betreiben eines Herdes durch Nutzung der Sonnenenergie ist vor allem der bauliche Aufwand. Abgesehen davon sind bei Backöfen insbesondere für den gewerblichen bzw. industriellen Einsatz hinsichtlich des Wärmehaushalts Anforderungen zu erfüllen, die bei Herden mit einem Backraum für Haushaltszwecke im Allgemeinen nicht gestellt werden. In order to be able to use solar energy for the energy supply of a cooker with a baking chamber advantageous, it is known (EP 0 593 649 B1) to provide a loadable via a solar heat accumulator, which preferably comprises a filled with steel balls, can be acted upon with a heat carrier container, so for the heating circuit of the stove heat energy can be provided regardless of the position of the sun. With the help of appropriate control valves, the heat storage can be charged by applying to the heated in the solar collector heat carrier or discharged to heat the stove via the heating circuit through which the warm heat carrier is conveyed through the stove. By controlling the flow rate while the heating power for the stove can be adapted to the respective operating conditions. In order to be able to use the heat carrier heated in the solar collector directly for the operation of the stove, the charging circuit connected to the solar collector can also be connected directly to the heating circuit for the stove. A disadvantage of This known system for operating a stove by using solar energy is mainly the construction effort. Apart from that, in the case of ovens, in particular for commercial or industrial use, with regard to the heat balance, requirements which are generally not met in ovens having a baking chamber for domestic use are to be met.
Darstellung der Erfindung Presentation of the invention
Der Erfindung liegt somit die Aufgabe zugrunde, einen Backofen mit einem Backraum der eingangs geschilderten Art so auszugestalten, dass er hinsichtlich des Wärmehaushalts den an Backöfen für den gewerblichen und industriellen Einsatz gestellten Anforderungen entspricht, und zwar mit einem vergleichsweise geringen baulichen Aufwand. The invention is therefore based on the object, an oven with a baking chamber of the type described in such a way that it corresponds to the requirements placed on ovens for commercial and industrial use in terms of heat balance, with a relatively low construction costs.
Die Erfindung löst die gestellte Aufgabe dadurch, dass der Wärmespeicher und der über dem Wärmespeicher vorgesehene Backraum in einer wärmeisolierten Einhausung angeordnet sind und dass der Heizkreis auf einer Schamotteauskleidung des Backraums verlegt ist. The invention solves the problem set by the fact that the heat storage and the oven provided above the heat storage chamber are arranged in a thermally insulated housing and that the heating circuit is laid on a fireclay lining of the oven.
Durch die Anordnung des Backraums und des Wärmespeichers in einer gemeinsamen, wärmeisolierten Einhausung können zunächst Wärmeverluste über Verbindungsleitungen zwischen dem Wärmespeicher und dem Backofen einfach vermieden werden. Die Anordnung des Backraums unmittelbar oberhalb des Wärmespeichers stellt dabei nicht nur eine vorteilhafte, kompakte Bauweise sicher, sondern nimmt auch darauf Rücksicht, dass der Backraum die vom Wärmespeicher abgestrahlte Wärme aufnehmen kann. Dazu kommt, dass durch die wärmefeste Schamotteauskleidung des Backraums eine für die Wärmebeaufschlagung des Backraums günstige Verteilung der von der Schamotteauskleidung abgestrahlten Wärme erreicht wird, wenn der Heizkreis in der Schamotteauskleidung auf der den Backraum abgewandten Seite verlegt wird, sodass sich durch die Summe dieser Maßnahmen ein für einen insbesondere den gewerblichen und industriellen Einsatz kennzeichnenden Lang- zeitbetrieb des Backofens vorteilhafter Wärmehaushalt unter Wahrung vergleichsweise einfacher baulicher Maßnahmen erzielen lässt. Due to the arrangement of the oven and the heat storage in a common, heat-insulated housing first heat losses through connecting lines between the heat storage and the oven can be easily avoided. The arrangement of the baking chamber immediately above the heat storage not only ensures an advantageous, compact design, but also takes into account that the baking chamber can absorb the radiated heat from the heat storage. In addition, through the heat-resistant fireclay lining of the baking chamber, a distribution of the heat emitted by the fireclay lining, which is advantageous for applying heat to the baking chamber, is achieved when the heating circuit in the fireclay lining is laid on the side facing away from the baking chamber, so that the sum of these measures results in a for a particular commercial and industrial use characterized time operation of the oven advantageous heat balance while maintaining comparatively simple structural measures can be achieved.
Damit die Wärmebeaufschlagung des Backraums den Backbedingungen vorteilhaft angepasst werden kann, kann der Backraum in üblicher Weise ein Gewölbe aufweisen, auf dessen Schamotteauskleidung zwischen einer Verteilerleitung und einer Sammelleitung parallel geschaltete Heizleitungen des Heizkreises verlaufen. Diese Maßnahme bewirkt eine gleichmäßige Wärmeabstrah- lung über die gesamte Backraumlänge in Richtung der Gewölbeachse. Im Bedarfsfall kann aber selbstverständlich auch durch den Boden des Backraums ein Abschnitt des Heizkreises geführt werden, der vorzugsweise gesondert angesteuert wird, um den Backraum mit einer an den Bedarfsfall angepassten Ober- und Unterhitze beaufschlagen zu können. Thus, the heat load of the oven can be adapted to the baking conditions advantageous, the oven can have a vault in the usual way, run on the fireclay lining between a manifold and a manifold parallel heating cables of the heating circuit. This measure effects uniform heat radiation over the entire cooking chamber length in the direction of the vault axis. If necessary, but can of course also be guided through the bottom of the baking chamber, a portion of the heating circuit, which is preferably controlled separately, to be able to apply the baking chamber with an adapted to the case of need upper and lower heat.
Um für das Laden und Entladen des Wärmespeichers vorteilhafte Voraussetzungen geschaffen werden können, kann der Ladekreis wenigstens eine im Bodenbereich des Wärmespeichers vorgesehene Leitungsschlange für den Wärmeträger des Ladekreises umfassen, sodass sich innerhalb des flüssigen Wärmespeichermediums des Wärmespeichers eine Temperaturschichtung ausbilden kann, die die Nutzung der jeweiligen Höchsttemperatur des Wärmespeichers für den Heizkreis erlaubt, wenn der Heizkreis wenigstens eine im Deckenbereich des Wärmespeichers vorgesehene Leitungsschlange für den Wärmeträger des Heizkreises aufweist. Der vom Wärmespeichermedium gesonderte Wärmeträger für den Heizkreis stellt einerseits eine Sicherheit dar, dass durch das Wärmespeichermedium des Wärmespeichers der Backraum selbst bei einem Leckwerden des Heizkreises nicht verunreinigt werden kann, und bietet anderseits den Vorteil einer Wärmeentnahme, ohne die Schichtung des Wärmeträgermediums innerhalb des Wärmespeichers nachhaltig zu zerstören, wie dies der Fall wäre, wenn das Wärmespeichermedium als Wärmeträger für den Heizkreis verwendet wird. Damit unter Umgehung des Wärmespeichers der Heizkreis für einen Backraum mit einem über die Sonnenenergie erwärmten Wärmeträger beaufschlagt werden kann, kann der Heizkreis wahlweise an den Ladekreis angeschlossen werden. In order to create advantageous conditions for charging and discharging the heat accumulator, the charging circuit may comprise at least one provided in the bottom region of the heat storage pipe coil for the heat transfer of the charging circuit, so that can form a temperature stratification within the liquid heat storage medium of the heat storage, the use of the respective Maximum temperature of the heat accumulator allowed for the heating circuit when the heating circuit has at least one provided in the ceiling region of the heat accumulator line coil for the heat transfer medium of the heating circuit. The separate from the heat storage medium heat transfer medium for the heating circuit on the one hand represents a security that can not be contaminated by the heat storage medium of the heat storage of the oven even with a leak of the heating circuit, and on the other hand offers the advantage of heat removal, without the stratification of the heat transfer medium within the heat storage sustainable to destroy, as would be the case when the heat storage medium is used as a heat transfer medium for the heating circuit. Thus, bypassing the heat storage of the heating circuit for a baking chamber can be acted upon by a heated by the solar heat transfer medium, the heating circuit can be optionally connected to the charging circuit.
Zur Sicherstellung einer ausreichenden Wärmemenge für den Backbetrieb unabhängig von der Ladung des Wärmespeichers über den Sonnenkollektor kann der Wärmespeicher eine Zusatzheizung aufweisen, die das für einen Backbetrieb erforderliche Temperaturniveau innerhalb des Wärmespeichers auch bei widrigen äußeren Umständen ermöglicht. Diese Zusatzheizung, vorzugsweise ebenfalls ein Wärmetauscher, kann auf sehr unterschiedliche Weise mit Energie versorgt werden. Es kommt ja nur darauf an, dass im Notfall der Backofen nicht außer Betrieb genommen werden muss. To ensure a sufficient amount of heat for the baking operation regardless of the charge of the heat accumulator on the solar panel, the heat accumulator may have an additional heating, which allows the required for a baking operation temperature level within the heat storage even in adverse external circumstances. This additional heating, preferably also a heat exchanger, can be supplied with energy in very different ways. It is only important that in an emergency, the oven does not need to be taken out of service.
Kurze Beschreibung der Zeichnung Short description of the drawing
In der Zeichnung ist der Erfindungsgegenstand beispielsweise dargestellt. Es zeigen In the drawing, the subject invention is shown, for example. Show it
Fig. 1 einen erfindungsgemäßen Backofen in einem schematischen Blockschaltbild und  Fig. 1 shows a baking oven according to the invention in a schematic block diagram and
Fig. 2 den Backofen schematisch in einer stirnseitigen Ansicht in einem größeren Maßstab.  Fig. 2 shows the oven schematically in a frontal view on a larger scale.
Weg zur Ausführung der Erfindung Way to carry out the invention
Der in den Fig. 1 und 2 schematisch dargestellte Backofen weist einen mit einer Schamotteauskleidung 1 versehenen Backraum 2 auf, der an seiner vorderen Stirnseite mit einer Bedienöffnung 3 versehen ist, wie dies insbesondere der Fig. 1 entnommen werden kann, die den Backofen in einem schematischen Längsschnitt zeigt. Die Schamotteauskleidung 1 bildet gemäß der Fig. 2 in üblicher Weise ein Gewölbe 4, das von einer Bodenplatte 5 getragen wird. Der Backraum 2 ist auf einen Wärmespeicher 6 aufgesetzt, dessen Behälter 7 zu- sammen mit dem Backraum 2 in einer gemeinsamen, wärmeisolierten Einhau- sung 8 angeordnet ist. Gemäß dem dargestellten Ausführungsbeispiel ist die Einhausung 8 aus einem den Behälter 7 des Wärmespeichers 6 aufnehmenden Unterteil 9 und einem Oberteil 10 aufgebaut, wobei die Anordnung so getroffen ist, dass die Bodenplatte 5 des Backraums 2 den Unterteil 9 mit dem Behälter 7 des Wärmespeichers 6 nach oben abschließt und der Oberteil 10 auf die über die Schamotteauskleidung 1 des Backraums 2 vorstehende Bodenplatte 5 aufgesetzt ist. The oven shown schematically in Figs. 1 and 2 has a provided with a fireclay lining 1 baking chamber 2, which is provided at its front end with a control opening 3, as can be seen in particular of FIG. 1, the oven in a schematic longitudinal section shows. The fireclay lining 1 forms according to FIG. 2 in the usual way a vault 4, which is supported by a bottom plate 5. The baking chamber 2 is placed on a heat accumulator 6 whose container 7 is together with the baking chamber 2 in a common, heat-insulated Einhau- 8 is arranged. According to the illustrated embodiment, the housing 8 from a container 7 of the heat accumulator 6 receiving lower part 9 and an upper part 10 is constructed, wherein the arrangement is made such that the bottom plate 5 of the baking chamber 2 the lower part 9 with the container 7 of the heat storage device 6 after closes at the top and the upper part 10 is placed on the over the fireclay lining 1 of the baking chamber 2 projecting bottom plate 5.
Gemäß der Fig. 1 wird der Wärmespeicher 6 über einen mit einer Ladepumpe 1 1 versehenen Ladekreis 12 geladen, der über einen Wärmetauscher 13 an den Kollektorkreis 14 eines Sonnenkollektors 15 angeschlossen ist. Die Pumpe für den Kollektorkreis 14 ist mit 16 bezeichnet. Der Sonnenkollektor 15 selbst weist in an sich bekannter Weise eine im Querschnitt parabolartige Reflektorwanne 17 und ein Absorberrohr 18 in der Brennachse dieser Reflektorwanne 17 auf, sodass die im Bereich des Absorberrohres 18 gebündelte, reflektierte Wärmestrahlung der Sonne für eine ausreichende Temperatur des Wärmeträgers des Kollektorkreises 14 sorgt, um einen Backofen mit Wärmeenergie versorgen zu können. Der Ladekreis 12 bildet innerhalb des Behälters 7 für den Wärmespeicher 6 einen Wärmetauscher in Form wenigstens einer im Bodenbereich des Wärmespeichers 6 vorgesehenen Leitungsschlange 19, die über den Behälterboden mäanderförmig verlegt ist, sodass der Wärmespeicher 6 über den gesamten Bodenbereich des Behälters 7 gleichmäßig mit Wärme beaufschlagt werden kann. Innerhalb des Behälters 7 des Wärmespeichers 6 ist ein die Wärme des Ladekreises 13 aufnehmendes Wärmespeichermedium vorgesehen, über das die gespeicherte Wärme an einen Heizkreis 20 für den Backraum 2 abgegeben werden kann. Der mit einer Heizpumpe 21 versehene Heizkreis 20 bildet im Deckenbereich des Behälters 7 des Wärmespeichers 6 eine wiederum mäanderförmig verlegte Leitungsschlange 22 als Wärmetauscher. Über diesen Wärmetauscher wird der Wärmeträger für den Heizkreis 20 erwärmt, der Heizleitungen 23 für den Backraum 2 umfasst. Diese Heizleitungen 23 sind jeweils zwischen einer Verteilerleitung 24 entlang der Bodenplatte 5 und einer Sammelleitung 25 entlang des Scheitels des Gewölbes 4 des Backraums 2 parallel geschaltet, sodass der Backraum 2 über seine sich in Richtung der Gewölbeachse erstreckende Länge gleichmäßig mit Wärme beaufschlagt werden kann. Über die Strömungsgeschwindigkeit des Wärmeträgers des Heizkreises 20 kann die Backtemperatur innerhalb des Backraums 2 gesteuert werden. According to FIG. 1, the heat accumulator 6 is charged via a charging circuit 12 provided with a charge pump 11, which is connected to the collector circuit 14 of a solar collector 15 via a heat exchanger 13. The pump for the collector circuit 14 is designated 16. The solar collector 15 itself has in a conventional manner a cross-sectionally parabolic reflector pan 17 and an absorber tube 18 in the focal axis of the reflector pan 17, so that the bundled in the absorber tube 18, reflected heat radiation of the sun for a sufficient temperature of the heat carrier of the collector circuit 14th ensures that it can supply an oven with heat energy. The charging circuit 12 forms within the container 7 for the heat storage 6, a heat exchanger in the form of at least one provided in the bottom region of the heat accumulator 6 line coil 19 which is laid meandering over the container bottom, so that the heat storage 6 applied uniformly over the entire bottom region of the container 7 with heat can be. Within the container 7 of the heat accumulator 6, the heat of the charging circuit 13 receiving heat storage medium is provided, via which the stored heat can be delivered to a heating circuit 20 for the oven 2. The provided with a heating pump 21 heating circuit 20 forms in the ceiling region of the container 7 of the heat accumulator 6, in turn meandering laid pipe coil 22 as a heat exchanger. About this heat exchanger, the heat carrier for the heating circuit 20 is heated, comprising the heating lines 23 for the baking chamber 2. These heating lines 23 are each between a distribution line 24 along the bottom plate 5 and a manifold 25 along the vertex of the vault 4 of the baking chamber 2 connected in parallel, so that the baking chamber 2 can be acted upon uniformly over its extending in the direction of the vault axis length with heat. About the flow rate of the heat carrier of the heating circuit 20, the baking temperature can be controlled within the baking chamber 2.
Damit auch bei einem Ausfall des Sonnenkollektors 15 der Backofen betrieben werden kann, ist der Wärmespeicher 6 mit einer Zusatzheizung 26 in Form eines strichpunktiert angedeuteten Wärmetauschers ausgerüstet. Thus, even with a failure of the solar panel 15 of the oven can be operated, the heat storage 6 is equipped with an auxiliary heater 26 in the form of a dash-dotted line indicated heat exchanger.
Da der Backraum 2 mit seiner Schamotteauskleidung 1 und den auf der Außenseite der Schamotteauskleidung 1 verlegten Heizleitungen 23 innerhalb einer gemeinsamen, wärmeisolierten Einhausung 8 zusammen mit dem Wärmespeicher 6 angeordnet und auf den Behälter 7 des Wärmespeichers 6 aufgesetzt ist, ergeben sich baulich vergleichsweise einfache, den Wärmeverhältnissen vorteilhaft Rechnung tragende Konstruktionsbedingungen, die die Nutzung der Sonnenenergie für Backöfen im gewerblichen und industriellen Einsatz mit einem vergleichsweise hohen Wirkungsgrad erlauben, ohne auf eine ausreichende Regelung der Wärmezufuhr zum Backraum 2 verzichten zu müssen. In diesem Zusammenhang ist festzuhalten, dass das Blockschaltbild nach Fig. 1 nur die grundsätzlichen Leitungsverbindungen veranschaulicht und beispielsweise die Ausgleichsbehälter, Steuerventile und Steuergeräte aus Übersichtlichkeitsgründen nicht zeigt. Außerdem wird die durchaus sinnvolle Verbindung zwischen dem Ladekreis 12 und dem Heizkreis 20 vernachlässigt, um den Backraum 2 unter Umgehung des Wärmespeichers 6 wahlweise über den Sonnenkollektor 15 betreiben zu können. Since the baking chamber 2 is arranged with its fireclay lining 1 and laid on the outside of the fireclay lining 1 heating cables 23 within a common, heat-insulated housing 8 together with the heat storage 6 and placed on the container 7 of the heat accumulator 6, structurally comparatively simple, den Heat conditions advantageous bill-bearing design conditions that allow the use of solar energy for ovens in commercial and industrial use with a relatively high efficiency without having to do without sufficient control of the heat supply to the oven 2. In this context, it should be noted that the block diagram of FIG. 1 illustrates only the basic line connections and, for example, does not show the expansion tank, control valves and control units for reasons of clarity. In addition, the quite meaningful connection between the charging circuit 12 and the heating circuit 20 is neglected to operate the baking chamber 2, bypassing the heat accumulator 6 optionally on the solar panel 15 can.

Claims

P a t e n t a n s p r ü c h e Patent claims
1 . Backofen mit einem Backraum (2), mit einem an einen Wärmespeicher (6) angeschlossenen Heizkreis (20) für den Backraum (2) und mit einem an einen Sonnenkollektor (15) angeschlossenen Ladekreis (12) für den Wärmespeicher (6), dadurch gekennzeichnet, dass der Wärmespeicher (6) und der über dem Wärmespeicher (6) vorgesehene Backraum (2) in einer wärmeisolierten Einhausung (8) angeordnet sind und dass der Heizkreis (20) auf einer Schamotteauskleidung (1 ) des Backraums (2) verlegt ist. 1 . Oven with a baking chamber (2), with a heating circuit (20) connected to a heat accumulator (6) for the baking chamber (2) and with a charging circuit (12) for the heat accumulator (6) connected to a solar collector (15) in that the heat store (6) and the baking space (2) provided above the heat store (6) are arranged in a heat-insulated housing (8) and that the heating circuit (20) is laid on a fireclay lining (1) of the baking space (2).
2. Backofen nach Anspruch 1 , dadurch gekennzeichnet, dass der Backraum (2) ein Gewölbe (4) aufweist, auf dessen Schamotteauskleidung (1 ) zwischen einer Verteilerleitung (24) und einer Sammelleitung (25) parallel geschaltete Heizleitungen (23) des Heizkreises (20) verlaufen. 2. Baking oven according to claim 1, characterized in that the baking chamber (2) has a vault (4), on the fireclay lining (1) between a distribution line (24) and a manifold (25) parallel heating cables (23) of the heating circuit ( 20).
3. Backofen nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Ladekreis (12) wenigstens eine im Bodenbereich des Wärmespeichers (6) vorgesehene Leitungsschlange (19) für den Wärmeträger des Ladekreises (12) umfasst. 3. Baking oven according to claim 1 or 2, characterized in that the charging circuit (12) at least one in the bottom region of the heat accumulator (6) provided for line coil (19) for the heat carrier of the charging circuit (12).
4. Backofen nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Heizkreis (20) wenigstens eine im Deckenbereich des Wärmespeichers (6) vorgesehene Leitungsschlange (22) für den Wärmeträger des Heizkreises (20) umfasst. 4. Baking oven according to one of claims 1 to 3, characterized in that the heating circuit (20) comprises at least one in the ceiling region of the heat accumulator (6) provided for line coil (22) for the heat transfer medium of the heating circuit (20).
5. Backofen nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Ladekreis (12) wahlweise mit dem Heizkreis (20) verbindbar ist. 5. Baking oven according to one of claims 1 to 4, characterized in that the charging circuit (12) optionally with the heating circuit (20) is connectable.
6. Backofen nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass für den Wärmespeicher (6) eine Zusatzheizung (26) vorgesehen ist. 6. Baking oven according to one of claims 1 to 5, characterized in that for the heat storage (6) an additional heater (26) is provided.
EP12761876.7A 2011-09-28 2012-09-03 Oven Not-in-force EP2761228B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA1401/2011A AT511203B1 (en) 2011-09-28 2011-09-28 OVEN
PCT/AT2012/050123 WO2013044280A1 (en) 2011-09-28 2012-09-03 Oven

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EP2761228A1 true EP2761228A1 (en) 2014-08-06
EP2761228B1 EP2761228B1 (en) 2017-11-08

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160161150A1 (en) * 2014-12-04 2016-06-09 Steven B. Zintel Solar powered cooking device
CN108916868B (en) * 2018-06-14 2019-09-10 玉和建设有限公司 A kind of material return device for circulating fluidized bed boiler lining low temperature furnace drying method

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Publication number Priority date Publication date Assignee Title
DE813382C (en) * 1949-03-22 1951-09-13 Heinz Dr-Ing Hefermann Electrically heated oven
HU207152B (en) 1991-07-05 1993-03-01 Gabor Goede Solar-energy utilizing apparatus and collector unit and connection arrangement for solar-energy utilizing apparatus
DE4142119A1 (en) * 1991-12-20 1993-06-24 Klemens Prof Dr Schwarzer Solar cooker with collector for heating medium - has hand regulator and storage together with several hobs to which there is controlled medium supply
DE19603742A1 (en) * 1996-02-02 1997-08-07 Poetzscher Carola Portable heater or cooker for food
DE20007857U1 (en) * 2000-04-29 2000-09-14 Carola Pötzscher GmbH & Co. KG Lebensmitteltechnik, 08144 Stenn Portable wood oven
DE10045074A1 (en) * 2000-09-12 2002-03-28 Bsh Bosch Siemens Hausgeraete Domestic appliance system has useful heat provided by latent heat storage device supplied with solar and/or geothermal heat energy
CN102252430B (en) * 2011-04-30 2013-09-04 张其明 Indoor oven of solar heat storage device
CN102261749B (en) * 2011-05-30 2013-08-28 张其明 Solar oven

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Title
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See also references of WO2013044280A1 *

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WO2013044280A1 (en) 2013-04-04
AT511203B1 (en) 2012-10-15
EP2761228B1 (en) 2017-11-08
AT511203A4 (en) 2012-10-15

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