EP1936285B1 - Cooking appliance with heat storage and operation method therefore - Google Patents

Cooking appliance with heat storage and operation method therefore Download PDF

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Publication number
EP1936285B1
EP1936285B1 EP20060025272 EP06025272A EP1936285B1 EP 1936285 B1 EP1936285 B1 EP 1936285B1 EP 20060025272 EP20060025272 EP 20060025272 EP 06025272 A EP06025272 A EP 06025272A EP 1936285 B1 EP1936285 B1 EP 1936285B1
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EP
European Patent Office
Prior art keywords
cooking chamber
cooking
blower
chamber
storage means
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EP20060025272
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German (de)
French (fr)
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EP1936285A1 (en
Inventor
Peter Kohlstrung
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Rational AG
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Rational AG
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Priority to EP20060025272 priority Critical patent/EP1936285B1/en
Priority to DE200650002850 priority patent/DE502006002850D1/en
Publication of EP1936285A1 publication Critical patent/EP1936285A1/en
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    • 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
    • F24C15/32—Arrangements of ducts for hot gases, e.g. in or around baking ovens
    • F24C15/322—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation

Definitions

  • the present invention relates to a cooking appliance according to the preamble of claim 1 and a method for coupling hot gases from an energy store in a cooking chamber such a cooking appliance.
  • a cooking appliance with a heat storage can be introduced from the hot gases in a cooking chamber known.
  • the heat required for this purpose is generated by burning a liquid or solid fuel and absorbed by a heat-storing mass.
  • the heat is transferred to the cooking chamber by heat conduction in coherent metallic structures, which act as heat exchangers.
  • heat energy from the heat storage can be used to vaporize a liquid, which can then be mixed with combustion gases.
  • a cooking apparatus with a gas burner which is arranged axially in the intake opening of a convection centrifugal turbine and designed to heat the air.
  • the gas burner is supplied with gas from a gas reservoir, via a feed line, by means of gas generated by the convection centrifuges turbine, and combustion gas is simultaneously evacuated by an anal via said pressure differences.
  • the supply line is attached to a built-in cooking device air deflector.
  • the DE 23 34 285 A1 describes a cooking appliance with a heat storage, in which with the help of a fan, the entire cooking chamber is passed through a heat storage to heat them there. Subsequently, the heated air in the heat accumulator flows through the cooking chamber on the food and there releases its heat. From there it gets back to the fan, so that a complete circulation of the cooking chamber through the heat storage possible.
  • a convection oven with a heat storage known in which the air is passed from the oven with the help of a fan through the heat storage, they introduce it on the side opposite the fan of the cooking chamber again in this.
  • a generic cooking appliance is for example from the EP 1 092 115 B1 known.
  • stored energy in the form of thermal, electrical and / or mechanical energy in the cooking appliance using a measuring and control system can be used in an energy storage and energy extraction system, in particular in a heat storage thereof.
  • the energy storage and energy extraction system is energy convective removed, it is desirable to obtain the most effective heat storage, to operate this at the highest possible temperatures of the storage medium.
  • the temperature of a gas which is passed through the heat accumulator can thus go beyond the temperatures normally used in cooking appliances when entering the cooking chamber, so that the surface of a food in the oven can be heated too much, which can lead to an undesirable cooking result ,
  • Object of the present invention is therefore to further develop the generic cooking appliance such that the disadvantages of the prior art are overcome.
  • Claims 2 to 7 describe preferred cooking appliances according to the invention.
  • the invention also provides an experience for coupling hot gases from an energy store into a cooking chamber of a cooking appliance according to the invention as claimed in claim 8.
  • the invention is therefore based on the surprising finding that by supplying a supply current from an energy store, in particular in the form of a heat accumulator, into the intake area of a circulating fan of a cooking appliance, extremely effective mixing of hot gases from the heat store with a colder cooking space atmosphere is possible in a simple manner. without this, for example, for tanning characteristics of the cooking appliance important Strömungseige, communities change when connecting the supply current from the heat storage.
  • Such a structure is particularly cost-effective, since in addition to the heat storage only one supply pipe for supplying hot gas from the heat storage in the cooking chamber and a discharge pipe for discharging gas from the cooking atmosphere in the heat storage are necessary.
  • an auxiliary blower can be provided for targeted heat removal from the heat accumulator, in particular when the discharge pipe to the heat accumulator does not open into the high-pressure region of the cooking appliance, namely into the blower chamber or pressure chamber of the cooking appliance.
  • the hot gas After the hot gas has been supplied from the heat accumulator via the supply pipe to the suction of Ummélzgebläses, it is sucked together with Garraumatmospphrasere in the recirculation fan and there extremely effectively mixed with the cooking chamber by the circulating fan.
  • the agitation achievable by the recirculation fan is orders of magnitude better than mixing produced by nozzles by turbulence because the blade of the recirculation fan can cut the recirculated gases and easily transfer much kinetic energy to the gases.
  • Cooking appliance remains, except in the immediate vicinity of the openings of the supply and the discharge pipe, unchanged, so that optimized for a uniform energy input in different positions in the oven cooking products optimized flow characteristics in the oven by switching on or off of gases from the heat storage largely remains undisturbed.
  • FIG. 1 shows a first erfmdungsgemaBes cooking appliance 1 with a heat storage 10, which is connected via a supply pipe 20 and a discharge pipe 30 with a cooking chamber 40.
  • a radial fan 50 is located in a pressure chamber 60, which is separated via an air guide plate 70 from the cooking chamber 40.
  • the radial fan 50, the one. Variety of fan blades 75 is driven by a motor 80 via a motor-fan shaft 90.
  • the overpressure can escape through openings 100 between the air guide plate 70 and cooking chamber walls 110 from the pressure chamber 60 into the cooking chamber 40.
  • a negative pressure which draws through a hope 120 in the air baffle 70 gases from the cooking chamber 40 into the pressure chamber 60.
  • the thus driven convection of the cooking chamber atmosphere is indicated by arrows 130.
  • the cooking chamber 40 and the pressure chamber 60 are surrounded by an insulation 140.
  • the motor 80 is suitably outside the insulation 140 in an installation room 150.
  • a controller 155 for the cooking device 1 is housed in addition to the motor 80.
  • the heat accumulator 10 is traversed by tubes 160 which are filled with a suitable heat-storing material.
  • the heat storage 10 may be formed as a separate aggregate, and the tubes 160 may be filled with a highly heatable saline solution, such as in the US Pat DE 23 34 286 C3 described, or with a low-melting medium, such as in the DE 10 2004 044 121 A1 described. But there are also other energy storage with the construction according to the invention can be used, such as those in the WO 99/63277 proposed.
  • the heat accumulator 10 instead of the tubes 160, the heat accumulator 10, for example, also have electrical resistance heaters, which are operable with energy from a heat storage.
  • the heat storage 10 can be charged at the times with thermal energy in which the cooking appliance. 1 no energy needed, or directly with excess heat from the cooking chamber are fed, for example, when the oven temperature is to be lowered.
  • the supply pipe 20 is mounted in the cooking appliance 1 such that its opening in the vicinity of the opening 120 in the Lußleitblech.70 opens.
  • the negative pressure generated at the opening 120 by the radial fan 50 thus also draws gas from the heat accumulator 10 into the interior of the radial fan 50, as indicated by the arrows 170 and 180 in FIG FIG. 1 indicated that represent the flow of the gas from the heat storage 10 out in the radial fan 50 into it.
  • auxiliary blower 200 which is placed in the discharge pipe 30, the volume flow of the gases along the arrows 170, 180, 190 and thus the heat input from the heat accumulator 10 in the cooking chamber 40 can be controlled.
  • the pressure difference between the garraum disorderen openings of the supply pipe 20 and the discharge pipe 30 is sufficient to a sufficient Ensure flow through the heat accumulator 10, the auxiliary blower 200 is also replaceable by a simple Klappenkonstxukommie or other shut-off, which determines the volume flow through the heat storage 10 by the position of the flap or flaps and thus controls the heat input from the heat storage 10 in the cooking chamber 40.
  • the flap construction and / or the auxiliary blower 200 are controlled by the controller 155 of the cooking device 1.
  • the main flow in the cooking chamber 40 along the arrows 130 is maintained even when connecting a current along the arrows 170, 180 out of the heat storage 10 out substantially, as the withdrawal stream along the arrow 180 and the sucked Garraumatinospreheat along the arrows 130 initially mixed by the radial fan 50 be and then flow through the openings 100 from the pressure chamber 60 into the cooking chamber 40.
  • the shape of the air guide plate 70 in particular the openings 100 and 120 thereof, determines the flow pattern regardless of whether the heat flow from the heat storage 10 is switched on or not. The flow characteristics and thus the energy inputs at the various positions in the cooking chamber 40 are retained.
  • the controller 155 is connected to sensors (not shown) which measure, for example, the temperature and the humidity of the cooking chamber atmosphere and the rotational speed of the radial fan 50. On the basis of the measurement results, the controller 155 controls the heat removal from the heat accumulator 10. With the help of a temperature sensor (not shown), for example, with controlled removal of heat from the heat accumulator 10 by the controller 155, a desired mixing temperature from the gases from the heat storage 10 and the Garraumatznospreheat generated.
  • the Temperatursensor is expediently arranged in the pressure chamber 60 between the radial fan 50 and the opening 100 between the air guide plate 70 and the cooking chamber walls 110 to measure the mixing temperature of the gases from the heat accumulator 10 and the cooking chamber, which are already mixed by the radial fan 50 ,
  • the corresponding measurement result of the temperature sensor can serve the controller 155 to control the auxiliary blower 200 in order to regulate the heat removal from the heat accumulator 10.
  • a heater may additionally be arranged around the radial fan 50 in the pressure chamber 60. With this heater, if the mixing temperature at maximum gas flow of the heat accumulator 10 is not sufficient, or the heat energy in the heat storage 10 is to be saved for a later date, the temperature of the gases flowing through the openings 100 in the cooking chamber 40 gases are increased to a desired temperature.
  • FIG. 2 shows a second cooking device according to the invention, which in essential points the same structure as that with reference to FIG. 1 described first inventive cooking appliance has. Therefore, the same reference numerals will be used in the following for all the components and currents that remained the same.
  • the second cooking appliance 1 according to the invention differs from the first cooking appliance 1 according to the invention in that the opening of the discharge pipe 30 'does not open into the cooking chamber 40 but into the pressure space 60. Accordingly, the flow direction through the heat accumulator 10 ', past the tubes 160', compared to that in FIG. 1 the direction of flow shown reversed, namely predetermined by the flow along the arrow 190 'from the pressure chamber 60 into the cooking chamber 40. However, the confluence of the gas flow along the arrows 170, 180 through the supply pipe 20' in the cooking chamber 40 is unchanged.
  • the pressure difference between the opening of the supply pipe 20 'and the opening of the discharge pipe 30' is increased.
  • the auxiliary blower 200 ' is weaker, ie with a lower power connection, designed or may even be omitted entirely and replaced for example by a controllable flap construction.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Baking, Grill, Roasting (AREA)

Description

Die vorliegende Erfindung betrifft ein Gargerät nach dem Oberbegriff von Anspruch 1 sowie ein Verfahren zum Einkoppeln von heißen Gasen aus einem Energiespeicher in einem Garraum solch eines Gargeräts.The present invention relates to a cooking appliance according to the preamble of claim 1 and a method for coupling hot gases from an energy store in a cooking chamber such a cooking appliance.

Aus der US 1,862,009 ist bereits ein Gargerät mit einem Wärmespeicher, aus dem heiße Gase in einen Garraum eingebracht werden können, bekannt. Die dazu benötigte Wärme wird durch Verbrennen eines flüssigen oder festen Brennstoffs erzeugt und von einer wärmespeichernden Masse absorbiert. Die Abgabe der Wärme an den Garraum erfolgt durch Wärmeleitung in zusammenhängenden metallischen Strukturen, die als Wärmetauscher fungieren. Ebenso kann Wärmeenergie aus dem Wärmespeicher dazu genutzt werden, eine Flüssigkeit zu verdampfen, die anschließend mit Verbrennungsgasen gemischt werden kann. So gelingt es mit dem Wärmespeicher, die Temperatur im Gargerät, insbesondere in den Wärmetauscher, möglichst konstant zu halten.From the US 1,862,009 is already a cooking appliance with a heat storage, can be introduced from the hot gases in a cooking chamber known. The heat required for this purpose is generated by burning a liquid or solid fuel and absorbed by a heat-storing mass. The heat is transferred to the cooking chamber by heat conduction in coherent metallic structures, which act as heat exchangers. Likewise, heat energy from the heat storage can be used to vaporize a liquid, which can then be mixed with combustion gases. Thus, it is possible with the heat storage to keep the temperature in the cooking appliance, in particular in the heat exchanger, as constant as possible.

Aus der EP 1 412 678 B1 ist ein Gargerät mit einem Gasbrenner bekannt, der axial in der Ansaugöffnung einer Konvektions-Zentrifugen-Turbine angeordnet und zum Erwärmen der Luft ausgebildet ist. Der Gasbrenner wird durch von der Konvektions-Zentrifugen Turbine erzeugte Druckunterschiede mit Gas aus einem Gasreservoir, über eine Zuleitung, versorgt, und über besagte Druckunterschiede wird gleichzeitig verbranntes Gas durch einen Anal evakuiert. Die Zuleitung ist dabei an einem im Gargerät eingebauten Luftleitblech angebracht.From the EP 1 412 678 B1 a cooking apparatus with a gas burner is known, which is arranged axially in the intake opening of a convection centrifugal turbine and designed to heat the air. The gas burner is supplied with gas from a gas reservoir, via a feed line, by means of gas generated by the convection centrifuges turbine, and combustion gas is simultaneously evacuated by an anal via said pressure differences. The supply line is attached to a built-in cooking device air deflector.

Die DE 23 34 285 A1 beschreibt ein Gargerät mit einem Wärmespeicher, bei dem mit Hilfe eines Lüfters die gesamte Garraumatmosphare durch einen Wärmespeicher geleitet wird, um diese dort zu erhitzen. Anschließend strömt die im Wärmespeicher erhitzte Luft durch den Garraum über das Gargut und gibt dort seine Wärme ab. Von dort gelangt sie erneut zum Lüfter, so daß eine komplette Umwälzung der Garraumatmosphäre durch den Wärmespeicher möglichst.The DE 23 34 285 A1 describes a cooking appliance with a heat storage, in which with the help of a fan, the entire cooking chamber is passed through a heat storage to heat them there. Subsequently, the heated air in the heat accumulator flows through the cooking chamber on the food and there releases its heat. From there it gets back to the fan, so that a complete circulation of the cooking chamber through the heat storage possible.

Aus der DE 26 18 998 A ist ein Umluftofen mit einem Wärmespeicher bekannt, bei dem die Luft aus dem Garraum mit Hilfe eines Gebläses durch den Wärmespeicher geleitet wird, am sie auf der dem Lüfterrad gegenüber liegenden Seite des Garraums wieder in diesen einzuführen. Ein gattungsgemäßes Gargerät ist beispielsweise aus der EP 1 092 115 B1 bekannt. Danach ist in einem Energiespeicher- und Energieentnahmesystem, insbesondere in einem Wärmespeicher desselben, gespeicherte Energie in Form von thermischer, elektrischer und/oder mechanischer Energie im Gargerät unter Einsatz eines Mess- und Regelsystems nutzbar. Dem Energiespeicher- und Energieentnahmesystem ist dabei Energie konvektiv entnehmbar, wobei es erwünscht ist, um einen möglichst effektiven Wärmespeicher, zu erhalten, diesen bei möglichst hohen Temperaturen des speichernden Mediums zu betreiben. Die Temperatur eines Gases, das durch den Wärmespeicher geleitet wird, kann beim Eintritt in den Garraum dadurch deutlich über die normalerweise in Gargeräten verwendeten Temperaturen hinausgehen, so dass die Oberfläche eines Garguts im Garraum zu stark erhitzt werden kann, was zu einem unerwünschten Garergebnis führen kann.From the DE 26 18 998 A is a convection oven with a heat storage known, in which the air is passed from the oven with the help of a fan through the heat storage, they introduce it on the side opposite the fan of the cooking chamber again in this. A generic cooking appliance is for example from the EP 1 092 115 B1 known. Thereafter stored energy in the form of thermal, electrical and / or mechanical energy in the cooking appliance using a measuring and control system can be used in an energy storage and energy extraction system, in particular in a heat storage thereof. The energy storage and energy extraction system is energy convective removed, it is desirable to obtain the most effective heat storage, to operate this at the highest possible temperatures of the storage medium. The temperature of a gas which is passed through the heat accumulator can thus go beyond the temperatures normally used in cooking appliances when entering the cooking chamber, so that the surface of a food in the oven can be heated too much, which can lead to an undesirable cooking result ,

Bei einem Gargerät nach der DE 2 229 939 wird versucht, dieses Problem dadurch zu umgehen, dass eine Vermischung von Garraumatmosphäre mit heißem Gas aus einem Wärmespeicher durch eine düsenartige Form einer Öffnung einer Leitung von dem Wärmespeicher im Bereich der Mündung in einen Garraum intensiviert wird. Dabei können auch mehrere Einzeldüsen zum Einsatz kommen. Die Entwicklung von Düsen und die Berechnung einer optimalen Düsenverteilung sind aber mit hohen Kosten verbunden. Zusätzlich kann eine effektive und gleichmäßige Durchmischung nur dann erreicht werden, wenn eine große Anzahl von Düsen passend zur Symmetrie des Garraums des Gargeräts an den Garraum angebracht sind. Des weiteren verändern eine solche Anordnung beim Zu- und Abschalten eines Zuleitungsstroms aus dem Wärmespeicher die Strömungscharakteristik im Garraum. Eine gleichmäßige Bräunung von Gargut in verschiedenen Ebenen und Positionen im Inneren des Garraums ist bei zwei unterschiedlichen Strömungsbildern praktisch ausgeschlossen. Eine weitere Verbesserung der Durchmischung der Garraumatmosphäre mit Gasen aus dem Wärmespeicher wäre zusätzlich wünschenswert.In a cooking appliance after the DE 2 229 939 An attempt is made to circumvent this problem by intensifying a mixing of the cooking chamber atmosphere with hot gas from a heat store by a nozzle-like shape of an opening of a line from the heat store in the area of the mouth into a cooking space. In this case, several individual nozzles can be used. The development of nozzles and the calculation of an optimal nozzle distribution are associated with high costs. In addition, an effective and uniform mixing can only be achieved if a large number of nozzles are fitted to the cooking chamber to match the symmetry of the cooking chamber of the cooking appliance. Furthermore, change such an arrangement when connecting and disconnecting a supply line from the heat storage, the flow characteristics in the oven. A uniform browning of food in different levels and positions inside the oven is practically impossible with two different flow patterns. A further improvement of the mixing of the cooking chamber atmosphere with gases from the heat storage would also be desirable.

Aufgabe der vorliegenden Erfindung ist es daher, das gattungsgemäße Gargerät derart weiterzuentwickeln, dass die Nachteile des Stands der Technik überwunden werden.Object of the present invention is therefore to further develop the generic cooking appliance such that the disadvantages of the prior art are overcome.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Kennzeichens von Anspruch 1 gelost.This object is achieved by the features of the characterizing part of claim 1.

Die Ansprüche 2 bis 7 beschreiben bevorzugte erfindungsgemäße Gargeräte.Claims 2 to 7 describe preferred cooking appliances according to the invention.

Die Erfindung liefert auch ein Erfahren zum Einkoppeln von heißen Gasen aus einem Energiespeicher in einen Garraum eines erfindungsgemäßen-Gargeräts nach Anspruch 8.The invention also provides an experience for coupling hot gases from an energy store into a cooking chamber of a cooking appliance according to the invention as claimed in claim 8.

In den Ansprüchen 9 und 10 werden bevorzugte erfindungsgemäße Verfahren beschrieben.Claims 9 and 10 describe preferred processes according to the invention.

Der Erfindung liegt somit die überraschende Erkenntnis zugrunde, dass durch Einspeisen eines Zuleitungsstroms aus einem Energiespeicher, insbesondere in Form eines Wärmespeichers, in den Ansaugbereich eines Umwälzgebläses eines Gargeräts in einfacher Weise eine äußerst effektive- Durchmischung heißer Gase aus dem Wärmespeicher mit kälterer Garraumatmosphäre möglich ist, ohne dass sich dabei beispielsweise für Bräunungscharakteristiken des Gargeräts wichtige Strömungseige,nschaften beim Zuschalten des Zuleitungsstroms aus dem Wärmespeicher verändern. Ein solcher Aufbau ist besonders kostengünstig, da neben dem Wärmespeicher nur ein Zuleitungsrohr zum Zufuhren von heißem Gas aus dem Wärmespeicher in den Garraum und ein Ableitungsrohr zum Ableiten von Gas aus der Garraumatmosphäre in den Wärmespeicher notwendig sind. Zusätzlich kann ein Hilfsgebläse zur gezielten Wärmeentnahme aus dem Wärmespeicher vorgesehen sein, insbesondere dann, wenn das Ableitungsrohr zum Wärmespeicher hin nicht in den Hochdruckbereich des Gargeräts, nämlich in den Gebläseraum beziehungsweise Druckraum des Gargeräts, mündet.The invention is therefore based on the surprising finding that by supplying a supply current from an energy store, in particular in the form of a heat accumulator, into the intake area of a circulating fan of a cooking appliance, extremely effective mixing of hot gases from the heat store with a colder cooking space atmosphere is possible in a simple manner. without this, for example, for tanning characteristics of the cooking appliance important Strömungseige, communities change when connecting the supply current from the heat storage. Such a structure is particularly cost-effective, since in addition to the heat storage only one supply pipe for supplying hot gas from the heat storage in the cooking chamber and a discharge pipe for discharging gas from the cooking atmosphere in the heat storage are necessary. In addition, an auxiliary blower can be provided for targeted heat removal from the heat accumulator, in particular when the discharge pipe to the heat accumulator does not open into the high-pressure region of the cooking appliance, namely into the blower chamber or pressure chamber of the cooking appliance.

Nachdem das heiße Gas aus dem Wärmespeicher über das Zuleitungsrohr dem Ansaugbereich des Umwälzgebläses zugeführt worden ist, wird es zusammen mit Garraumatmosphäre in das Umwälzgebläse eingesaugt und dort von dem Umwälzgebläse äußerst effektiv mit der Garraumatmosphäre gemischt. Die Durchmischung, die durch das Umwälzgebläse erreichbar ist, ist um Größenordnungen besser als eine von Düsen durch Verwirbelungen erzeugte Durchmischung, da die SchaufeIn-des.Umwälzgebläses die umgewälzten Gase zerschneiden und leicht viel kinetische Energie auf die Gase übertragen können. Die Strömungs charakteristik des Gargeräts bleibt dabei, außer in unmittelbarer Umgebung der Öffnungen des Zuleitungs- und des Ableitungsrohrs, unverändert, so dass eine auf einen gleichmäßigen Energieeintrag in auf unterschiedlichen Positionen im Garraum plazierte Gargüter optimierte Strömungscharakteristik im Garraum durch ein Zuschalten bzw. Abschalten von Gasen aus dem Wärmespeicher weitgehend ungestört bleibt.After the hot gas has been supplied from the heat accumulator via the supply pipe to the suction of Umwälzgebläses, it is sucked together with Garraumatmosphäre in the recirculation fan and there extremely effectively mixed with the cooking chamber by the circulating fan. The agitation achievable by the recirculation fan is orders of magnitude better than mixing produced by nozzles by turbulence because the blade of the recirculation fan can cut the recirculated gases and easily transfer much kinetic energy to the gases. The flow characteristic of Cooking appliance remains, except in the immediate vicinity of the openings of the supply and the discharge pipe, unchanged, so that optimized for a uniform energy input in different positions in the oven cooking products optimized flow characteristics in the oven by switching on or off of gases from the heat storage largely remains undisturbed.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung von zwei erfindungsgemäßen Ausführungsbeispielen anhand einer schematischen Zeichnung. Dabei zeigt:

  • Figur 1 ein erstes erfindungsgemäßes Gargerät mit einem Wärmespeicher; und
  • Figur 2 ein zweites erfindungsgemäßes Gargerät mit einem Wärmespeicher.
Further features and advantages of the invention will become apparent from the following description of two embodiments of the invention with reference to a schematic drawing. Showing:
  • FIG. 1 a first inventive cooking appliance with a heat storage; and
  • FIG. 2 a second inventive cooking appliance with a heat storage.

Figur 1 zeigt ein erstes erfmdungsgemaBes Gargerät 1 mit einem Wärmespeicher 10, der über ein Zuleitungsrohr 20 und ein Ableitungsrohr 30 mit einem Garraum 40 verbunden ist. Ein Radiallüfter 50 befindet sich in einem Druckraum 60, der über ein Luftleitblech 70 vom Garraum 40 getrennt ist. Der Radiallüfter 50, der eine. Vielzahl von Lüfterschaufeln 75 aufweist, ist von einem Motor 80 über eine Motor-Gebläsewelle 90 antreibbar. So ist es möglich, durch Drehen des Radiallüfters 50 einen Überdruck im Druckraum 60 um den Radiallüfter 50 herum (in der Figur 1 über und unter dem Radiallüfter 50) zu erzeugen. Der Überdruck kann durch Öffnungen 100 zwischen dem Luftleitblech 70 und Garraumwänden 110 aus dem Druckraum 60 in den Garraum 40 entweichen. Gleichzeitig herrscht bei Betrieb des Radiallüfters 50 im Zentrum desselben ein Unterdruck, der durch eine hoffnung 120 im Luftleitblech 70 Gase aus dem Garraum 40 in den Druckraum 60 zieht. Die dadurch angetriebene Konvektion der Garraumatmosphäre ist durch Pfeile 130 angedeutet. Um die Wärmeverluste des Gargeräts 1 zu minimieren, sind der Garraum 40 und der Druckraum 60 von einer Isolation 140 umgeben. Der Motor 80 liegt zweckmäßiger Weise außerhalb der Isolation 140 in einem Installationsraum 150. In dem Installationsraum 150 ist neben dem Motor 80 auch ein Regler 155 für das Gargerät 1 untergebracht. Der Wärmespeicher 10 ist von Rohren 160 durchzogen, die mit einem geeigneten wärmespeichernden Material gefüllt sind. FIG. 1 shows a first erfmdungsgemaBes cooking appliance 1 with a heat storage 10, which is connected via a supply pipe 20 and a discharge pipe 30 with a cooking chamber 40. A radial fan 50 is located in a pressure chamber 60, which is separated via an air guide plate 70 from the cooking chamber 40. The radial fan 50, the one. Variety of fan blades 75 is driven by a motor 80 via a motor-fan shaft 90. Thus, it is possible by turning the radial fan 50, an overpressure in the pressure chamber 60 around the radial fan 50 around (in the FIG. 1 above and below the radial fan 50). The overpressure can escape through openings 100 between the air guide plate 70 and cooking chamber walls 110 from the pressure chamber 60 into the cooking chamber 40. At the same time prevails during operation of the radial fan 50 in the center thereof, a negative pressure, which draws through a hope 120 in the air baffle 70 gases from the cooking chamber 40 into the pressure chamber 60. The thus driven convection of the cooking chamber atmosphere is indicated by arrows 130. In order to minimize the heat losses of the cooking appliance 1, the cooking chamber 40 and the pressure chamber 60 are surrounded by an insulation 140. The motor 80 is suitably outside the insulation 140 in an installation room 150. In the installation room 150, a controller 155 for the cooking device 1 is housed in addition to the motor 80. The heat accumulator 10 is traversed by tubes 160 which are filled with a suitable heat-storing material.

Der Wärmespeicher 10 kann als separates Aggregat ausgebildet sein, und die Rohre 160 können mit einer hocherhitzbaren Salzlösung gefüllt sein, wie zum Beispiel in der DE 23 34 286 C3 beschrieben, oder mit einem niedrig schmelzenden Medium, wie beispielsweise in der DE 10 2004 044 121 A1 beschrieben. Es sind aber auch andere Energiespeicher mit dem- erfindungsgemäßen Aufbau einsatzbar, wie zum Beispiel die in der WO 99/63277 vorgeschlagenen. Anstatt der Rohre 160 kann der Wärmespeicher 10 beispielsweise auch elektrische Widerstandsheizungen aufweisen, die mit Energie aus einem Wärmespeicher betreibbar sind. Der Wärmespeicher 10 kann zu den Zeiten mit Wärmeenergie aufgeladen werden, in denen das Gargerät. 1 keine Energie benötigt, oder auch direkt mit überflüssiger Wärme aus dem Garraum gespeist werden, zum Beispiel, wenn die Garraumtemperatur abgesenkt werden soll.The heat storage 10 may be formed as a separate aggregate, and the tubes 160 may be filled with a highly heatable saline solution, such as in the US Pat DE 23 34 286 C3 described, or with a low-melting medium, such as in the DE 10 2004 044 121 A1 described. But there are also other energy storage with the construction according to the invention can be used, such as those in the WO 99/63277 proposed. Instead of the tubes 160, the heat accumulator 10, for example, also have electrical resistance heaters, which are operable with energy from a heat storage. The heat storage 10 can be charged at the times with thermal energy in which the cooking appliance. 1 no energy needed, or directly with excess heat from the cooking chamber are fed, for example, when the oven temperature is to be lowered.

Das Zuleitungsrohr 20 ist derart im Gargerät 1 angebracht, dass seine Öffnung in der Nähe der Öffnung 120 im Lußleitblech.70 mündet. Der durch den Radiallüfter 50 erzeugte Unterdruck an der Öffnung 120 zieht so auch Gas aus dem Wärmespeicher 10 in das Innere des Radiallüfters 50, wie durch die Pfeile 170 und 180 in Figur 1 angedeutet, die die Strömung des Gases aus dem Wärmespeicher 10 heraus in den Radiallüfter 50 hinein darstellen. Wegen der Druckdifferenz zwischen den beiden garraumseitigen Öffnungen zu dem Wärmespeicher 10, nämlich einerseits des Zuleitungsrohrs 20 und andererseits des Ableitungsrohrs 30, strömt zudem ein Teil der Garraumatmosphare durch das Ableitungsrohr 30 in den Wärmespeicher 10 hinein, wie durch den Pfeil 190 in Figur 1 angedeutet, der die Strömungsriehtung der Gase aus dem Garraum 40 zum Wärmespeicher 10 hin darstellt.The supply pipe 20 is mounted in the cooking appliance 1 such that its opening in the vicinity of the opening 120 in the Lußleitblech.70 opens. The negative pressure generated at the opening 120 by the radial fan 50 thus also draws gas from the heat accumulator 10 into the interior of the radial fan 50, as indicated by the arrows 170 and 180 in FIG FIG. 1 indicated that represent the flow of the gas from the heat storage 10 out in the radial fan 50 into it. Because of the pressure difference between the two garraumseitigen openings to the heat accumulator 10, namely on the one hand the supply pipe 20 and the other of the discharge pipe 30, also flows part of the cooking chamber through the discharge pipe 30 into the heat storage 10 into, as indicated by the arrow 190 in FIG. 1 indicated that represents the flow direction of the gases from the cooking chamber 40 to the heat accumulator 10 out.

Strömt kühlere Garraumatmosphäre gemäß dem Pfeil 190 in den Wärmespeicher 10, so findet ein Wärmeaustausch zwischen diesem eingesaugten Gas und dem wärmespeichemden Medium in den Rohren 160 über die entsprechenden Rohrwände statt. Dadurch erhitzt sich das einströmende Gas. Das erhitzte Gas strömt längs des Pfeils 170 anschließend durch das Zuleitungsrohr 20 in Richtung des garraumes 40 zurück. Beim Eintritt in den Garraum 40 strömt das heiße Gas längs des Pfeils 180 dann zum Zentrum des Radiallüfters 50. Dort durchmischt es sich mit der im Garraum 40, umgewälzten Garraumatmosphäre 130 durch die Rotation des Radiallüfters 50 und gelangt anschließend durch die Öffnungen 100 zwischen dem-Luftleitblech 70 und der Garraumwand 110 wieder in den Garraum 40.If a cooler cooking atmosphere flows according to the arrow 190 into the heat accumulator 10, there is a heat exchange between this sucked gas and the heat-storing medium in the tubes 160 via the corresponding tube walls. As a result, the incoming gas heats up. The heated gas subsequently flows along the arrow 170 back through the supply pipe 20 in the direction of the garraumes 40 back. When entering the cooking chamber 40, the hot gas then flows along the arrow 180 to the center of the radial fan 50. There, it mixes with the cooking chamber circulated in the cooking chamber 40 by the rotation of the radial fan 50 and then passes through the openings 100 between the two. Air baffle 70 and the cooking chamber 110 back into the cooking chamber 40th

Mit Hilfe eines Hilfsgebläses 200, das im Ableitungsrohr 30 platziert ist, ist der Volumenstrom der Gase längs der Pfeile 170, 180, 190 und damit der Wärmeeintrag aus dem Wärmespeicher 10 in den Garraum 40 kontrollierbar. Reicht die Druckdifferenz zwischen den garraumseitigen Öffnungen des Zuleitungsrohrs 20 und des Ableitungsrohrs 30 aus, um eine ausreichende Durchströmung des Wärmespeichers 10 sicherzustellen, ist das Hilfsgebläse 200 auch durch eine einfache Klappenkonstxuktion oder eine andere Absperreinrichtung ersetzbar, die durch die Stellung der Klappe oder Klappen den Volumenstrom durch den Wärmespeicher 10 bestimmt und so den Wärmeeintrag aus dem Wärmespeicher 10 in den Garraum 40 steuert. Die Klappenkonstruktion und/oder das Hilfsgebläse 200 werden durch den Regler 155 des Gargeräts 1 gesteuert.With the help of an auxiliary blower 200, which is placed in the discharge pipe 30, the volume flow of the gases along the arrows 170, 180, 190 and thus the heat input from the heat accumulator 10 in the cooking chamber 40 can be controlled. The pressure difference between the garraumseitigen openings of the supply pipe 20 and the discharge pipe 30 is sufficient to a sufficient Ensure flow through the heat accumulator 10, the auxiliary blower 200 is also replaceable by a simple Klappenkonstxuktion or other shut-off, which determines the volume flow through the heat storage 10 by the position of the flap or flaps and thus controls the heat input from the heat storage 10 in the cooking chamber 40. The flap construction and / or the auxiliary blower 200 are controlled by the controller 155 of the cooking device 1.

Die Hauptströmung im Garraum 40 entlang der Pfeile 130 bleibt auch bei Zuschalten eines Stroms entlang der Pfeile 170, 180 aus dem Wärmespeicher 10 heraus im wesentlichen erhalten, da der Entnahmestrom entlang des Pfeils 180 und die angesaugte Garraumatinosphäre entlang der Pfeile 130 zunächst vom Radiallüfter 50 durchmischt werden und anschließend durch die Öffnungen 100 aus dem Druckraum 60 in den Garraum 40 strömen. Die Form des Luftleitblechs 70, insbesondere der Öffnungen 100 und 120 derselben, bestimmt dabei das Strömungsbild unabhängig davon, ob der Wärmestrom aus dem Wärmespeicher 10 zugeschaltet ist, oder nicht. Die Strömungscharakteristik und damit die Energieeinträge auf den verschiedenen Positionen im Garraum 40 bleiben so erhalten.The main flow in the cooking chamber 40 along the arrows 130 is maintained even when connecting a current along the arrows 170, 180 out of the heat storage 10 out substantially, as the withdrawal stream along the arrow 180 and the sucked Garraumatinosphäre along the arrows 130 initially mixed by the radial fan 50 be and then flow through the openings 100 from the pressure chamber 60 into the cooking chamber 40. The shape of the air guide plate 70, in particular the openings 100 and 120 thereof, determines the flow pattern regardless of whether the heat flow from the heat storage 10 is switched on or not. The flow characteristics and thus the energy inputs at the various positions in the cooking chamber 40 are retained.

Der Regler 155 ist mit Sensoren (nicht gezeigt) verbunden, die zum Beispiel die Temperatur und die Feuchte der Garraumatmosphäre und die Rotationsgeschwindigkeit des Radiallüfters 50 messen. Auf der Grundlage der Meßergebnisse steuert der Regler 155 die Wärmeentnahme aus dem Wärmespeicher 10. Mit Hilfe eines Temperatursensors (nicht gezeigt) ist beispielsweise bei kontrollierter Entnahme von Wärme aus dem Wärmespeicher 10 durch den Regler 155 eine gewünschte Mischtemperatur aus den Gasen aus dem Wärmespeicher 10 und der Garraumatznosphäre erzeugbar. Der Temperatürsensor ist dazu zweckmäßiger weise im Druckraum 60 zwischen dem Radiallüfter 50 und der Öffnung 100 zwischen dem Luftleitblech 70 und den Garraumwänden 110 angeordnet, um die Mischtemperatur der Gase aus dem Wärmespeicher 10 und der Garraumatmosphäre, die bereits vom Radiallüfter 50 durchmischt sind, zu messen. Das entsprechende Messergebnis des Temperatursensors kann dem Regler 155 dazu dienen, das Hilfsgebläse 200 anzusteuern, um damit die Wärmeentnahme aus dem Wärmespeicher 10 zu regeln.The controller 155 is connected to sensors (not shown) which measure, for example, the temperature and the humidity of the cooking chamber atmosphere and the rotational speed of the radial fan 50. On the basis of the measurement results, the controller 155 controls the heat removal from the heat accumulator 10. With the help of a temperature sensor (not shown), for example, with controlled removal of heat from the heat accumulator 10 by the controller 155, a desired mixing temperature from the gases from the heat storage 10 and the Garraumatznosphäre generated. The Temperatursensor is expediently arranged in the pressure chamber 60 between the radial fan 50 and the opening 100 between the air guide plate 70 and the cooking chamber walls 110 to measure the mixing temperature of the gases from the heat accumulator 10 and the cooking chamber, which are already mixed by the radial fan 50 , The corresponding measurement result of the temperature sensor can serve the controller 155 to control the auxiliary blower 200 in order to regulate the heat removal from the heat accumulator 10.

Eine Heizung (nicht gezeigt) kann zusätzlich um den Radiallüfter 50 herum im Druckraum 60 angeordnet sein. Mit dieser Heizung kann, wenn die Mischtemperatur bei maximaler Gasdurchströmung des Wärmespeichers 10 nicht ausreicht, oder die Wärmeenergie im Wärmespeicher 10 für einen späteren Zeitpunkt aufgespart werden soll, die Temperatur der durch die Öffnungen 100 in den Garraum 40 strömenden Gase auf eine Soll-Temperatur erhöht werden.A heater (not shown) may additionally be arranged around the radial fan 50 in the pressure chamber 60. With this heater, if the mixing temperature at maximum gas flow of the heat accumulator 10 is not sufficient, or the heat energy in the heat storage 10 is to be saved for a later date, the temperature of the gases flowing through the openings 100 in the cooking chamber 40 gases are increased to a desired temperature.

Figur 2 zeigt ein zweites erfindungsgemäßes Gargerät, das in wesentlichen Punkten den gleichen Aufbau wie das mit Bezug auf Figur 1 beschriebene erste erfindungsgemäße Gargerät hat. Deswegen werden im folgenden für alle gleich gebliebenen Bauteile und Strömungen, die gleichen Bezugszeichen verwendet. Das zweite erfindungsgemäße Gargerät 1 unterscheidet sich von dem ersten erfindungsgemäßen Gargerät 1 dadurch, dass die Öffnung des Ableitungsrohrs 30' nicht in den Garraum 40, sondern in den Druckraum 60 mündet. Dementsprechend ist die Strömungsrichtung durch den Wärmespeicher 10', an den Rohren 160' vorbei, im Vergleich zu der in Figur 1 gezeigten Strömungsrichtung umgekehrt, nämlich vorgegeben von der Strömung längs des Pfeils 190' aus dem Druckraum 60 in den Garraum 40. Die Einmündung des Gasstroms längs der Pfeile 170, 180 durch das Zuleitungsrohr 20' in den Garraum 40 ist jedoch unverändert. FIG. 2 shows a second cooking device according to the invention, which in essential points the same structure as that with reference to FIG. 1 described first inventive cooking appliance has. Therefore, the same reference numerals will be used in the following for all the components and currents that remained the same. The second cooking appliance 1 according to the invention differs from the first cooking appliance 1 according to the invention in that the opening of the discharge pipe 30 'does not open into the cooking chamber 40 but into the pressure space 60. Accordingly, the flow direction through the heat accumulator 10 ', past the tubes 160', compared to that in FIG. 1 the direction of flow shown reversed, namely predetermined by the flow along the arrow 190 'from the pressure chamber 60 into the cooking chamber 40. However, the confluence of the gas flow along the arrows 170, 180 through the supply pipe 20' in the cooking chamber 40 is unchanged.

Durch die in Figur 2 gezeigte Anordnung ist die Druckdifferenz zwischen der Öffnung des Zuleitungsrohrs 20' und der Öffnung des Ableitungsrohrs 30' vergrößert. Bei diesem Aufbau ist also das Hilfsgebläse 200' schwächer, d. h. mit einer geringeren Anschlußleistung, ausgelegt oder kann sogar ganz weggelassen und beispielsweise durch eine steuerbare Klappenkonstruktion ersetzt werden.By the in FIG. 2 As shown, the pressure difference between the opening of the supply pipe 20 'and the opening of the discharge pipe 30' is increased. In this structure, so the auxiliary blower 200 'is weaker, ie with a lower power connection, designed or may even be omitted entirely and replaced for example by a controllable flap construction.

Die in der voranstehenden Beschreibung, den Ansprüchen sowie der Zeichnung offenbarten Merkmale können sowohl einzeln als auch in jeder beliebigen Kombination für die Verwirklichung der Erfindung in ihren verschiedenen Ausführungsformen wesentlich sein.The features disclosed in the preceding description, the claims and the drawings may be essential both individually and in any combination for the realization of the invention in its various embodiments.

BezusszeichenlisteBezusszeichenliste

1, 1'1, 1 '
GargerätCooking appliance
10,10'10.10 '
Wärmespeicherheat storage
20, 20'20, 20 '
Zuleitungsrohrsupply pipe
30,30'30.30 '
Ableitungsrohrdrain pipe
4040
Garraumoven
5050
Radiallüfterradial fans
6060
Druckraumpressure chamber
7070
LuftleitblechAir baffle
7575
Lüfterschaufelnfan blades
8080
Motorengine
9090
Motor-GebläsewelleMotor-fan shaft
100100
Öffnungen zwischen Luftleitblech und GarraumwändenOpenings between air baffle and cooking chamber walls
110110
Garraumwändeoven walls
120120
Öffnung im LuftleitblechOpening in the air baffle
130130
Konvektion der GarraumatmosphäreConvection of the cooking chamber atmosphere
140140
Isolation des GarraumsInsulation of the cooking chamber
150150
Installationsrauminstallation space
155155
Reglerregulator
160, 160'160, 160 '
RohreTube
170170
Strömung aus dem Wärmespeicher herausFlow out of the heat storage
180180
Einmündende Strömung aus dem Zuleitungsrohr in den GarraumIncoming flow from the supply pipe into the cooking chamber
190,190'190.190 '
Strömung zum Wärmespeicher hinFlow to the heat storage out
200, 200'200, 200 '
Hilfsgebläseauxiliary blower

Claims (10)

  1. Cooking device (1, 1') comprising a cooking chamber (40), a blower (50) in a pressure chamber (60) which is physically separated from the cooking chamber (40) by at least one air guide element (70), and an energy storage means (10), in particular in the form of a heat storage means, which is connected to the cooking chamber (40) via at least one feed line (20, 20') for conducting gas from the energy storage means (10) to the cooking chamber (40), with the air guide element (70) leaving open at least one first opening (120) between the cooking chamber (40) and the pressure chamber (60) in a first region in which the blower (50) generates a negative pressure, and at least a second opening (100) between the cooking chamber (40) and the pressure chamber (60) in a second region in which the blower (50) generates a negative pressure, characterized in that
    the feed line (20, 20') is fitted to the cooking chamber (40) in such a way that the opening of the feed line (20, 20') to the cooking chamber (40) issues in the first region of a negative pressure which is generated by the blower (50), so that gas (170, 180) flowing out of the feed line (20, 20') flows into the blower (50), can be thoroughly mixed with cooking chamber atmosphere (130) during operation of the blower (50), and flows back into the cooking chamber (40) through the second opening (100) between the air guide element (70) and a cooking chamber wall (110).
  2. Cooking device according to Claim 1, characterized by
    at least one discharge line (30, 30') for discharging gas from the cooking chamber (40) into the energy storage means (10), with the discharge line (30') preferably being fitted to the cooking chamber (40) and/or pressure chamber (60) in such a way that the opening of the discharge line (30') is positioned in the region of the negative pressure which is generated by the blower (50).
  3. Cooking device according to Claim 1 or 2, characterized in that
    at least one auxiliary blower (200, 200'), at least one pump and/or at least one shut-off element are/is arranged in the feed and/or discharge line (20, 20', 30, 30') in order to adjust the gas flow through the energy storage means (10).
  4. Cooking device according to one of the preceding claims, characterized in that the feed line (20, 20') is or can be connected to, or is designed to be at least partly combined with, the air guide element (70).
  5. Cooking device according to one of the preceding claims, characterized in that
    the feed line (20, 20') is in the form of a feed pipe and/or the discharge line (30, 30') is in the form of a discharge pipe and/or the air guide element (70) is in the form of an, in particular double-walled, plate, at least in regions.
  6. Cooking device according to one of the preceding claims, characterized in that
    the blower (50) comprises a radial fan.
  7. Cooking device according to one of the preceding claims, characterized by
    an open- or closed-loop control unit (155) in operative connection to the energy storage means (10), the blower (50), the auxiliary blower (200, 200'), the pump, the shut-off element, a heating device, preferably arranged around the radial fan, and/or at least one sensor, in particular for detecting the temperature, the moisture and/or the flow rate in the cooking chamber and/or the blower rotation speed.
  8. Method for injecting hot gas from the energy storage means into a cooking chamber of an inventive cooking device according to one of the preceding claims, characterized in that
    the temperature in the cooking chamber is determined by means of thorough mixing of cooking chamber atmosphere and gas from the energy storage means, preferably as a function of the rotation speed of the blower.
  9. Method according to Claim 8, characterized in that the temperature in the cooking chamber can also be adjusted by means of an auxiliary blower, a pump and/or a shut-off element.
  10. Method according to either of Claims 8 and 9, characterized in that
    the temperature in the cooking chamber is adjusted by means of a heating device.
EP20060025272 2006-12-07 2006-12-07 Cooking appliance with heat storage and operation method therefore Expired - Fee Related EP1936285B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20060025272 EP1936285B1 (en) 2006-12-07 2006-12-07 Cooking appliance with heat storage and operation method therefore
DE200650002850 DE502006002850D1 (en) 2006-12-07 2006-12-07 Cooking appliance with heat storage and method for its operation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20060025272 EP1936285B1 (en) 2006-12-07 2006-12-07 Cooking appliance with heat storage and operation method therefore

Publications (2)

Publication Number Publication Date
EP1936285A1 EP1936285A1 (en) 2008-06-25
EP1936285B1 true EP1936285B1 (en) 2009-02-11

Family

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Country Status (2)

Country Link
EP (1) EP1936285B1 (en)
DE (1) DE502006002850D1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2221545A1 (en) * 2010-01-08 2010-08-25 V-Zug AG Oven with latent heat reservoir
WO2012062864A1 (en) 2010-11-11 2012-05-18 Arcelik Anonim Sirketi An oven wherein the cooking time is shortened
DE102010061300A1 (en) * 2010-12-17 2012-06-21 Miele & Cie. Kg Cooking appliance and method for operating a cooking appliance
GB2536316B (en) * 2015-08-05 2017-03-22 Premier Autoclaves Service And Solutions Ltd Heat recovery system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1862009A (en) 1929-10-11 1932-06-07 Gasaccumulator Svenska Ab Cooking stove with heat accumulator
DE2618998A1 (en) * 1976-04-29 1977-11-17 Wamsler Herd & Ofen Gmbh Electric oven heat storage zone - has main and auxiliary parts supplying mixing channel with temp. operated flap at auxiliary part
US5696872A (en) * 1994-10-07 1997-12-09 Seward; Harold H. Thermal energy storage and exchanger device
DE19824172A1 (en) 1998-05-29 1999-12-09 Rational Gmbh Cooking appliance with energy storage and energy extraction system
FR2828268B1 (en) 2001-07-31 2006-02-24 Bourgeois Prod Coop FORCED CONVEXION GAS OVEN
DE102004044121B4 (en) * 2004-09-13 2007-09-13 Rational Ag Combi damper with a heat storage device

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DE502006002850D1 (en) 2009-03-26

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