EP0236269A2 - Infrared heated oven - Google Patents

Infrared heated oven Download PDF

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Publication number
EP0236269A2
EP0236269A2 EP87810099A EP87810099A EP0236269A2 EP 0236269 A2 EP0236269 A2 EP 0236269A2 EP 87810099 A EP87810099 A EP 87810099A EP 87810099 A EP87810099 A EP 87810099A EP 0236269 A2 EP0236269 A2 EP 0236269A2
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EP
European Patent Office
Prior art keywords
oven
infrared
grate
switch
setting
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.)
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Application number
EP87810099A
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German (de)
French (fr)
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EP0236269A3 (en
Inventor
Albrecht Kunz
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Uniboard AG
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Uniboard AG
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Publication of EP0236269A2 publication Critical patent/EP0236269A2/en
Publication of EP0236269A3 publication Critical patent/EP0236269A3/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
    • F24C15/16—Shelves, racks or trays inside ovens; Supports therefor
    • F24C15/162—Co-operating with a door, e.g. operated by the door
    • 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
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/04—Stoves or ranges heated by electric energy with heat radiated directly from the heating element
    • F24C7/046—Ranges

Definitions

  • the present invention relates to an infrared oven for heating and / or keeping food warm, the housing of which has an oven door hinged along the lower edge and the interior of which has a grate that can be pulled out or pushed in to place at least one food container, and one below and one above the grate arranged, rod-shaped infrared radiator.
  • Infrared ovens for baking, toasting, roasting and roasting or for heating prefabricated, chilled or frozen foods or for keeping prepared meals warm are known in a large number of different embodiments. These embodiments make insufficient use of the economic advantages of heating with infrared radiation because the radiation emitted by the radiation source usually diverges greatly and therefore only impinges on the material to be heated to a lesser extent and because the majority of the infrared radiation comes from the Surface of the material to be heated is converted into heat. In order to avoid excessive browning or even burning of the surface layers, the radiation source and the furnace are therefore usually dimensioned for weak heating with relatively poor efficiency. These known embodiments also have the disadvantage that the interior of the oven we is difficult to access due to the compact construction, which increases the risk of painful burns for the operator.
  • the present invention was therefore based on the object of providing an infrared oven which is economically advantageous, which can be used for a large number of different applications and which is user-friendly.
  • this object is achieved with an infrared oven of the type mentioned at the outset, which is characterized in that, in order to generate infrared radiation which strikes the grate practically perpendicularly, the bottom and top surfaces are bent in cross section to form a cylindrical concave mirror and each infrared -Heater is arranged practically in the focal line of the concave mirror of the associated floor or top surface, that for warming up without burning and for keeping warm without drying out the dishes, a program circuit with a first switch for selecting the heating periods and with a second switch for setting the operating time is provided is and that to prevent the risk of injury when setting and removing the food containers, the grate is slidably mounted in the transverse direction of the interior and is connected to the oven door by means of articulated rods.
  • the cross-sectional shape of the bottom and top surfaces and the arrangement of the infrared emitters relative to these surfaces mean that the infrared radiation strikes the grate or the material placed on the grate unimpeded and practically perpendicular.
  • most of the radiation energy is used for heating Well supplied and strikes at an angle at which the radiation is optimally absorbed.
  • Switching on the infrared emitters during an operating period with selectable heating periods enables the heat generated on the surface of the material to be heated to penetrate into the material without the surface burning due to overheating.
  • the mechanical connection between the oven door and the sliding grate means that when the door is opened, the grate together with the goods placed is pulled out of the oven interior and is accessible without hindrance, which simplifies the operator's work and in particular significantly reduces the risk of burns.
  • the infrared oven shown in FIGS. 1 and 2 has a housing 10, the front of which is provided with an opening 11 which forms the access to the interior 12 of the oven.
  • the interior of the furnace is enclosed by two side walls, of which only one side wall 13 can be seen in the figures, a rear wall 14 and a bottom and a top surface 16 and 17, respectively.
  • the bottom and the top surface have a bend 18 and 19 which is parabolic in cross-section and runs in the longitudinal direction of the furnace interior, downwards and upwards.
  • the deflection is a rod-shaped infrared radiator 21, 22 is arranged, which is held in (not shown) sockets, which are fixed in the side walls.
  • All walls of the furnace interior are highly polished or have a mirror finish.
  • a horizontal guide rail 23 is attached to each side wall, which two guide rails are provided for placing and moving a grating 24.
  • An oven door 26 is articulated on the lower horizontal edge of the opening 11.
  • An articulated rod 27 is provided on both sides of the oven door, which form a movement connection between the oven door and the grating. (The grating and the articulated rods are not shown in FIG. 1 for the sake of clarity.)
  • a glass pane is preferably inserted into the oven door, through which the material to be heated can be observed during the warming up.
  • two electrical switches 31, 32 are arranged on the front wall of the housing 10, by means of which the ratio of the switch-on to switch-off time (heating time to pause time) of the infrared radiators during a heating period and the total operating time are set.
  • Two signal lamps 34, 35 which are provided to indicate the operation or the expiry of a switched-on operating period, are also mounted adjacent to the switches.
  • the space between the furnace walls and the housing is filled with electrical lines, switching elements for the infrared radiators and with insulating material 33.
  • a connection (not shown) for the household power supply is provided on the rear of the housing.
  • the oven door 26 is opened first.
  • the grating 24 is partially pulled out of the furnace chamber 12 by the articulated rods 27, so that the material to be heated can simply be placed on the grating.
  • the oven door is closed, the grille and the items to be heated are pushed into the oven space by the hinged rods. Then, with the help of tables or empirical values, the optimal heating period and the entire operating time for the goods to be heated are set and the infrared emitters activated.
  • the radiation reflected from the bottom and top surfaces is practically vertically raised or reflected below in the part of the furnace space occupied by the material to be heated.
  • the corresponding signal lamp lights up When the oven door is opened, the grate is then pulled out of the oven space at the same time, so that the heated goods placed on the grate can be handled without touching hot oven parts.
  • a practically tested embodiment of the infrared oven described has a usable oven interior of 30 cm long, 20 cm deep and (above the grating) 7 cm high.
  • Each of the two rod-shaped infrared emitters has a power consumption of 500 watts.
  • the oven door can be swiveled by 60 ° when opening, the grille being pulled out about 12 cm from the oven.
  • the heat period switch 31 enables the heating time for every 60 seconds selectable time period of 15 sec or 30 sec or 45 sec to interrupt or to heat without interruption.
  • the operating time switch 32 is provided for setting the total operating time.
  • the infrared oven is particularly suitable for heating prepared dishes, whereby frozen "hot dogs", apple strudel or cheese cake with a setting of the heat period switch to 15 seconds interruption between successive heating times of 60 seconds after a total operating time of 5 to 6 minutes are heated consistently and got an appetizing brown crust. The same result was achieved for half of the total operating time for the same dishes when they were placed in the oven when thawed.
  • An obvious modification of the described embodiment relates to the signal lamps, one of which indicates the operation of the furnace can be dispensed with without disadvantage and the other which indicates that a set operating time has expired can be replaced by an acoustic signal generator.
  • the latter is particularly advantageous in embodiments which are intended for installation in Loka len or common rooms are provided, where acoustic signals are perceived better than optical signals.

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

Abstract

The IR oven is characterised by a combination of three features: The grill (24) arranged in the centre of the oven for accommodating the product to be heated is motionally connected to the oven door (26) and is pulled partially out of the oven when the door is opened; the bar-shaped IR emitters (21, 22), which are built in above and below the grill, are arranged in the caustic line of an associated concave mirror (18, 19); programming circuitry (31, 32) is provided, with which the duration and the number of heating periods following one another and separated from one another by switch-off pauses can be set. The features mentioned make it possible to remove the product to be heated from the oven without danger, to utilise the IR radiation optimally and to heat the product uniformly. <IMAGE>

Description

Die vorliegende Erfindung betrifft einen Infrarot-Ofen zum Erwärmen und/oder Warmhalten von Speisen, dessen Gehäuse eine längs der Unterkante angelenkte Ofentür und dessen Innenraum einen herauszieh- bzw. hineinschiebbaren Rost zum Aufstellen mindestens eines Speisegefässes aufweist, sowie einen unter und einen über dem Rost angeordneten, stabförmigen Infrarot-Strahler.The present invention relates to an infrared oven for heating and / or keeping food warm, the housing of which has an oven door hinged along the lower edge and the interior of which has a grate that can be pulled out or pushed in to place at least one food container, and one below and one above the grate arranged, rod-shaped infrared radiator.

Infrarot-Oefen zum Backen, Toasten, Rösten und Braten oder zum Erwärmen vorgefertigter, gekühlter oder tiefgekühlter Speisen oder zum Warmhalten vorbereiteter Mahlzeiten sind in einer Vielzahl unterschiedlicher Ausführungsformen bekannt. Diese Ausführungsformen nutzen die ökonomischen Vorteile des Erwärmens mit einer Infrarot-Strahlung nur ungenügend aus, weil die von der Strahlungsquelle abgegebene Strahlung gewöhnlich stark divergiert und darum nur zum kleineren Teil auf das zu erwärmende Gut auftrifft und weil der überwiegende Teil der Infrarot-Strahlung an der Oberfläche des zu erwärmenden Guts in Wärme umgewandelt wird. Um eine zu starke Bräunung oder gar Verbrennung der Oberflächenschichten zu vermeiden, werden darum die Strahlungsquelle und der Ofen gewöhnlich für eine schwache Erwärmung mit relativ schlechtem Wirkungsgrad dimensioniert. Diese bekannten Ausführungsformen haben weiter den Nachteil, dass der Ofeninnenraum wegen der gedrängten Bauweise nur schwer zugänglich ist, was für die Bedienungsperson die Gefahr schmerzhafter Verbrennungen erhöht.Infrared ovens for baking, toasting, roasting and roasting or for heating prefabricated, chilled or frozen foods or for keeping prepared meals warm are known in a large number of different embodiments. These embodiments make insufficient use of the economic advantages of heating with infrared radiation because the radiation emitted by the radiation source usually diverges greatly and therefore only impinges on the material to be heated to a lesser extent and because the majority of the infrared radiation comes from the Surface of the material to be heated is converted into heat. In order to avoid excessive browning or even burning of the surface layers, the radiation source and the furnace are therefore usually dimensioned for weak heating with relatively poor efficiency. These known embodiments also have the disadvantage that the interior of the oven we is difficult to access due to the compact construction, which increases the risk of painful burns for the operator.

Der vorliegenden Erfindung lag darum die Aufgabe zugrunde, einen Infrarot-Ofen zu schaffen, der ökonomisch vorteilhaft ist, der für eine grosse Zahl unterschiedlicher Anwendungen verwendet werden kann und der bedienungsfreundlich ist.The present invention was therefore based on the object of providing an infrared oven which is economically advantageous, which can be used for a large number of different applications and which is user-friendly.

Erfindungsgemäss wird diese Aufgabe mit einem Infrarot-Ofen der eingangs genannten Art gelöst, der dadurch gekennzeichnet ist, dass zum Erzeugen einer praktisch senkrecht auf den Rost auftreffenden Infrarot-Strahlung die Boden- und die Deckfläche im Querschnitt zu einem zylindrischen Hohlspiegel ausgebogen sind und jeder Infrarot-Strahler praktisch in der Brennlinie des Hohlspiegels der zugeordneten Boden- bzw. Deckfläche angeordnet ist, dass zum Durchwärmen ohne Verbrennen und zum Warmhalten ohne Austrocknen der Speisen eine Programmschaltung mit einem ersten Schalter zum Wählen der Wärmeperioden und mit einem zweiten Schalter zum Einstellen der Betriebsdauer vorgesehen ist und dass zum Verhindern der Verletzungsgefahr beim Einstellen und Herausnehmen der Speisengefässe der Rost in der Querrichtung des Innenraums verschiebbar gelagert und mittels Gelenkstangen mit der Ofentür bewegungsverbunden ist.According to the invention, this object is achieved with an infrared oven of the type mentioned at the outset, which is characterized in that, in order to generate infrared radiation which strikes the grate practically perpendicularly, the bottom and top surfaces are bent in cross section to form a cylindrical concave mirror and each infrared -Heater is arranged practically in the focal line of the concave mirror of the associated floor or top surface, that for warming up without burning and for keeping warm without drying out the dishes, a program circuit with a first switch for selecting the heating periods and with a second switch for setting the operating time is provided is and that to prevent the risk of injury when setting and removing the food containers, the grate is slidably mounted in the transverse direction of the interior and is connected to the oven door by means of articulated rods.

Bei dem beschriebenen Ofen bewirken die Querschnittsform der Boden- und der Deckfläche sowie die Anordnung der Infrarot-Strahler relativ zu diesen Flächen, dass die Infrarot-Strahlung unbehindert und praktisch senkrecht auf den Rost bzw. auf das auf den Rost gestellte Gut auftrifft. Dadurch wird der grösste Teil der Strahlungsenergie dem zu erwärmenden Gut zugeführt und trifft mit einem Winkel auf, bei dem die Strahlung optimal absorbiert wird. Das Einschalten der Infrarot-Strahler während einer Betriebsdauer mit wählbaren Wärmeperioden ermöglicht, dass die an der Oberfläche des zu erwärmenden Guts erzeugte Wärme in das Gut eindringt, ohne dass die Oberfläche infolge Ueberhitzung verbrennt. Schliesslich bewirkt die mechanische Verbindung zwischen Ofentür und dem verschiebbaren Rost, dass beim Oeffnen der Tür der Rost mitsamt dem aufgestellten Gut aus dem Ofeninneren herausgezogen und unbehindert zugänglich wird, was die Arbeit der Bedienungsperson vereinfacht und insbesondere die Gefahr von Verbrennungen ganz wesentlich vermindert.In the oven described, the cross-sectional shape of the bottom and top surfaces and the arrangement of the infrared emitters relative to these surfaces mean that the infrared radiation strikes the grate or the material placed on the grate unimpeded and practically perpendicular. As a result, most of the radiation energy is used for heating Well supplied and strikes at an angle at which the radiation is optimally absorbed. Switching on the infrared emitters during an operating period with selectable heating periods enables the heat generated on the surface of the material to be heated to penetrate into the material without the surface burning due to overheating. Finally, the mechanical connection between the oven door and the sliding grate means that when the door is opened, the grate together with the goods placed is pulled out of the oven interior and is accessible without hindrance, which simplifies the operator's work and in particular significantly reduces the risk of burns.

Nachfolgend wird eine bevorzugte Ausführungsform des erfindungsgemässen Infrarot-Ofens mit Hilfe der Figuren beschrieben. Es zeigen:

  • Fig. l die perspektivische Ansicht eines Infrarot-Ofens und
  • Fig. 2 den Querschnitt durch den Ofen gemäss der Fig. 1 im Bereich des Ofeninnenraums.
A preferred embodiment of the infrared oven according to the invention is described below with the aid of the figures. Show it:
  • Fig. L is a perspective view of an infrared oven and
  • Fig. 2 shows the cross section through the furnace according to FIG. 1 in the region of the furnace interior.

Der in den Fig. l und 2 gezeigte Infrarot-Ofen weist ein Gehäuse 10 auf, dessen Vorderseite mit einer Oeffnung 11 versehen ist, die den Zugang zum Ofeninnenraum 12 bildet. Der Ofeninnenraum wird von zwei Seitenwänden, wovon in den Figuren nur die eine Seitenwand 13 zu sehen ist, einer Rückwand 14 sowie einer Boden- und einer Deckfläche 16 bzw. 17 umschlossen. Die Boden- und die Deckfläche weisen eine in der Längsrichtung des Ofeninnenraums verlaufende, nach unten bzw. nach oben gerichtete, im Querschnitt parabolische Ausbiegung 18 bzw. 19 auf. In der "Brennlinie" jeder parabolischen Ausbiegung ist je ein stabförmiger Infrarot-Strahler 21, 22 angeordnet, der in (nicht gezeigten) Fassungen, die in den Seitenwänden befestigt sind, gehaltert ist. Alle Wände des Ofeninnenraums sind hochglanzpoliert oder weisen eine Verspiegelung auf. An jeder Seitenwand ist eine waagerechte Führungsschiene 23 befestigt, welche beiden Führungsschienen zum Auflegen und Verschieben eines Gitterrosts 24 vorgesehen sind. Am unteren waagerechten Rand der Oeffnung 11 ist eine Ofentür 26 angelenkt. Auf beiden Seiten der Ofentür ist eine Gelenkstange 27 vorgesehen, die eine Bewegungsverbindung zwischen der Ofentür und dem Gitterrost bilden. (Der Gitterrost und die Gelenkstangen sind in Fig. 1 der deutlicheren Darstellung wegen nicht gezeigt.) Vorzugsweise ist in die Ofentür eine Glasscheibe eingesetzt, durch die das zu erwärmende Gut während des Aufwärmens beobachtet werden kann.The infrared oven shown in FIGS. 1 and 2 has a housing 10, the front of which is provided with an opening 11 which forms the access to the interior 12 of the oven. The interior of the furnace is enclosed by two side walls, of which only one side wall 13 can be seen in the figures, a rear wall 14 and a bottom and a top surface 16 and 17, respectively. The bottom and the top surface have a bend 18 and 19 which is parabolic in cross-section and runs in the longitudinal direction of the furnace interior, downwards and upwards. In the "focal line" every paraboli The deflection is a rod-shaped infrared radiator 21, 22 is arranged, which is held in (not shown) sockets, which are fixed in the side walls. All walls of the furnace interior are highly polished or have a mirror finish. A horizontal guide rail 23 is attached to each side wall, which two guide rails are provided for placing and moving a grating 24. An oven door 26 is articulated on the lower horizontal edge of the opening 11. An articulated rod 27 is provided on both sides of the oven door, which form a movement connection between the oven door and the grating. (The grating and the articulated rods are not shown in FIG. 1 for the sake of clarity.) A glass pane is preferably inserted into the oven door, through which the material to be heated can be observed during the warming up.

Seitlich der Ofentür sind an der Vorderwand des Gehäuses 10 zwei elektrische Schalter 31, 32 angeordnet, mit denen das Verhältnis von Einschalt- zu Ausschaltzeit (Heizzeit zu Pausezeit) der Infrarot- Strahler während einer Wärmeperiode, sowie die gesamte Betriebsdauer eingestellt werden. Den Schaltern benachbart sind auch zwei Signallampen 34, 35 montiert, die zum Anzeigen des Betriebs bzw. des Ablaufs einer eingeschalteten Betriebsdauer vorgesehen sind.To the side of the oven door, two electrical switches 31, 32 are arranged on the front wall of the housing 10, by means of which the ratio of the switch-on to switch-off time (heating time to pause time) of the infrared radiators during a heating period and the total operating time are set. Two signal lamps 34, 35, which are provided to indicate the operation or the expiry of a switched-on operating period, are also mounted adjacent to the switches.

Der Raum zwischen den Ofenwänden und dem Gehäuse ist mit elektrischen Leitungen, Schaltelementen für die Infrarot-Strahler sowie mit Isoliermaterial 33 ausgefüllt.The space between the furnace walls and the housing is filled with electrical lines, switching elements for the infrared radiators and with insulating material 33.

Auf der Rückseite des Gehäuses ist ein (nicht gezeigter) Anschluss für das Haushaltstromnetz vorgesehen.A connection (not shown) for the household power supply is provided on the rear of the housing.

Bei der Verwendung des beschriebenen Infrarot-Ofens wird zuerst die Ofentür 26 geöffnet. Dabei wird der Gitterrost 24 von den Gelenkstangen 27 teilweise aus dem Ofenraum 12 herausgezogen, so dass das zu erwärmende Gut einfach auf den Gitterrost aufgestellt werden kann. Beim Schliessen der Ofentür wird der Gitterrost mitsamt dem zu erwärmenden Gut von den Gelenkstangen in den Ofenraum hineingeschoben. Danach werden mit Hilfe von Tabellen oder Erfahrungswerten die für das zu erwärmende Gut optimale Wärmeperiode und die gesamte Betriebszeit eingestellt und die Infrarot-Strahler aktiviert. Dann wird wegen des parabolischen Querschnitts der Ausbiegungen 18, 19 in der Boden- und der Deckfläche 16 bzw. 17 und der beschriebenen Anordnung der Infrarot-Strahler in diesen Ausbiegungen die von der Boden- und der Deckfläche reflektierte Strahlung praktisch senkrecht nach'oben bzw. unten in den von dem zu erwärmenden Gut besetzten Teil des Ofenraums reflektiert. Sobald die eingestellte Betriebsdauer abgelaufen ist und die Infrarot-Strahler abgeschaltet sind, leuchtet die entsprechende Signallampe auf. Beim Oeffnen der Ofentür wird dann zugleich der Gitterrost aus dem Ofenraum herausgezogen, so dass das auf dem Rost abgestellte erwärmte Gut behändigt werden kann, ohne heisse Ofenteile zu berühren.When using the infrared oven described, the oven door 26 is opened first. The grating 24 is partially pulled out of the furnace chamber 12 by the articulated rods 27, so that the material to be heated can simply be placed on the grating. When the oven door is closed, the grille and the items to be heated are pushed into the oven space by the hinged rods. Then, with the help of tables or empirical values, the optimal heating period and the entire operating time for the goods to be heated are set and the infrared emitters activated. Then, due to the parabolic cross section of the bends 18, 19 in the bottom and top surfaces 16 and 17 and the arrangement of the infrared radiators described in these bends, the radiation reflected from the bottom and top surfaces is practically vertically raised or reflected below in the part of the furnace space occupied by the material to be heated. As soon as the set operating time has expired and the infrared emitters are switched off, the corresponding signal lamp lights up. When the oven door is opened, the grate is then pulled out of the oven space at the same time, so that the heated goods placed on the grate can be handled without touching hot oven parts.

Eine praktisch erprobte Ausführungsform des beschriebenen Infrarot-Ofens hat einen nutzbaren Ofeninnenraum von 30 cm Lange, 20 cm Tiefe und (über dem Gitterrost) 7 cm Höhe. Jeder der beiden stabförmigen Infrarot-Strahler hat eine Leistungsaufnahme von 500 Watt. Die Ofentür kann beim Oeffnen um 60° verschwenkt werden, wobei der Gitterrost etwa 12 cm as dem Ofen herausgezogen wird. Der Wärmeperiodenschalter 31 ermöglicht, die Heizzeit nach jeweils 60 sec für eine wählbare Zeitspanne von 15 sec oder 30 sec oder 45 sec zu unterbrochen oder ohne Unterbrechung zu heizen. Der Betriebsdauerschalter 32 ist zum Einstellen der gesamten Betriebsdauer vorgesehen.A practically tested embodiment of the infrared oven described has a usable oven interior of 30 cm long, 20 cm deep and (above the grating) 7 cm high. Each of the two rod-shaped infrared emitters has a power consumption of 500 watts. The oven door can be swiveled by 60 ° when opening, the grille being pulled out about 12 cm from the oven. The heat period switch 31 enables the heating time for every 60 seconds selectable time period of 15 sec or 30 sec or 45 sec to interrupt or to heat without interruption. The operating time switch 32 is provided for setting the total operating time.

Der Infrarot-Ofen eignet sich insbesondere zum Erwärmen vorbereiteter Speisen, wobei tiefgekühlte "Hot-Dogs", Apfelstrudel oder Käsküchli mit einer Einstellung des Wärmeperiodenschalters auf 15 sec Unterbrechung zwischen aufeinanderfolgenden Heizzeiten von je 60 sec nach einer Gesamtbetriebsdauer von 5 bis 6 min durchgehend gleichmässig erwärmt wurden und eine appetitliche, braune Kruste erhielten. Das gleiche Ergebnis wurde für die gleichen Speisen, wenn diese im aufgetauten Zustand in den Ofen gestellt wurden, in der halben Gesamtbetriebszeit erreicht.The infrared oven is particularly suitable for heating prepared dishes, whereby frozen "hot dogs", apple strudel or cheese cake with a setting of the heat period switch to 15 seconds interruption between successive heating times of 60 seconds after a total operating time of 5 to 6 minutes are heated consistently and got an appetizing brown crust. The same result was achieved for half of the total operating time for the same dishes when they were placed in the oven when thawed.

Es versteht sich, dass die Abmessungen, die einzelnen Bauelemente und die Programmschaltung des beispielsweise beschriebenen Infrarot-Ofens an spezielle Verwendungen und Betriebsbedingungen angepasst werden können. Die einzelnen Bauelemente sind handelsüblich, und deren Montage liegt im Bereich fachmännischen Könnens, weshalb auf eine detaillierte Beschreibung dieser Bauelemente und der Montage ausdrücklich verzichtet wird.It goes without saying that the dimensions, the individual components and the program circuit of the infrared oven described, for example, can be adapted to special uses and operating conditions. The individual components are customary in the trade, and their assembly is within the range of specialist skill, which is why a detailed description of these components and the assembly is expressly dispensed with.

Eine naheliegende Aenderung der beschriebenen Ausführungsform betrifft die Signallampen, wovon auf die eine, die den Betrieb des Ofens anzeigt, ohne Nachteil verzichtet werden kann und die andere, welche anzeigt, dass eine eingestellte Betriebsdauer abgelaufen ist, durch einen akustischen Signalgeber ersetzt werden kann. Letzteres ist besonders vorteilhaft bei Ausführungsformen, die zum Aufstellen in Lokalen oder Gemeinschaftsräumen vorgesehen sind, wo akustische Signale besser als optische Signale wahrgenommen werden.An obvious modification of the described embodiment relates to the signal lamps, one of which indicates the operation of the furnace can be dispensed with without disadvantage and the other which indicates that a set operating time has expired can be replaced by an acoustic signal generator. The latter is particularly advantageous in embodiments which are intended for installation in Loka len or common rooms are provided, where acoustic signals are perceived better than optical signals.

Claims (3)

1. Infrarot-Ofen zum Erwärmen und/oder Warmhalten von Speisen, dessen Gehäuse (11) eine längs der Unterkante angelenkte Ofentür (26) aufweist und dessen Innenraum (12) einen herauszieh- bzw. hineinschiebbaren Rost (24) zum Aufstellen mindestens eines Speisegefässes aufweist, sowie einen unter und einen über dem Rost angeordneten, stabförmigen Infrarot-Strahler (21 bzw. 22), dadurch gekennzeichnet, dass zum Erzeugen einer praktisch senkrecht auf den Rost auftreffenden Infrarot-Strahlung die Boden- und die Deckfläche (16 bzw. 17) im Querschnitt zu einem zylindrischen Hohlspiegel (18 bzw. 19) ausgebogen sind und jeder Infrarot-Strahler (21, 22) praktisch in der Brennlinie des Hohlspiegels der zugeordneten Boden- bzw. Deckfläche angeordnet ist, dass zum Durchwärmen ohne Verbrennen und zum Warmhalten ohne Austrocknen der Speisen eine Prgrogrammschaltung mit einem ersten Schalter (31) zum Wählen der Wärmeperioden und einem zweiten Schalter (32) zum Einstellen der Betriebsdauer vorgesehen ist und dass zum Verhindern der Verletzungsgefahr beim Einstellen und Herausnehmen der Speisengefässe der Rost (24) in der Querrichtung des Innenraums (12) verschiebbar gelagert und mittels Gelenkstangen (27) mit der Ofentür (26) bewegungsverbunden ist. 1. infrared oven for heating and / or keeping food warm, the housing (11) of which has an oven door (26) articulated along the lower edge and whose interior (12) has a grate (24) that can be pulled out or pushed in to set up at least one feed vessel, as well as a rod-shaped infrared radiator (21 and 22) arranged below and above the grate, characterized in that the bottom and top surfaces (16 and 17) are bent out in cross-section to form a cylindrical concave mirror (18 and 19) in order to generate an infrared radiation which strikes the grate practically perpendicularly and each infrared radiator (21, 22) is arranged practically in the focal line of the concave mirror of the associated floor or top surface, that to warm up without burning and to keep warm without drying out the food a program program circuit with a first switch (31) for selecting the heating periods and a second switch (32) is provided for setting the operating time and for preventing the risk of injury when setting and removing the food containers the grate (24) is slidably mounted in the transverse direction of the interior (12) and is connected to the furnace door (26) by means of articulated rods (27). 2. Infrarot-Ofen nach Anspruch 1, dadurch gekennzeichnet, dass die zylindrischen Hohlspiegel (18, 19) im Querschnitt eine parabolische Biegung aufweisen.2. Infrared oven according to claim 1, characterized in that the cylindrical concave mirror (18, 19) have a parabolic bend in cross section. 3. Infrarot-Ofen nach Anspruch 1, dadurch gekennzeichnet, dass die Programmschaltung einen ersten Schalter (31) zum Einstellen der Dauer einzelner Wärmeperioden, die aus einer fest eingestellten Heizzeit und einer wählbaren Pausezeit bestehen, und einen zweiten Schalter (32) zum Einstellen der gesamten Betriebsdauer aufweist.3. Infrared oven according to claim 1, characterized in that the program circuit has a first switch (31) for setting the duration of individual heating periods, which consist of a fixed heating time and a selectable pause time, and a second switch (32) for setting the total operating time.
EP87810099A 1986-02-27 1987-02-20 Infrared heated oven Withdrawn EP0236269A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH786/86A CH669509A5 (en) 1986-02-27 1986-02-27
CH786/86 1986-02-27

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EP0236269A2 true EP0236269A2 (en) 1987-09-09
EP0236269A3 EP0236269A3 (en) 1989-01-04

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EP87810099A Withdrawn EP0236269A3 (en) 1986-02-27 1987-02-20 Infrared heated oven

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0370597A2 (en) * 1988-11-24 1990-05-30 Haruo Takase Apparatus using microwaves for thermotherapy
GB2232346A (en) * 1989-04-07 1990-12-12 Tamehiko Ikeda Infrared oven
EP0540435A1 (en) * 1991-10-30 1993-05-05 Dragomir Jovanovic Infrarouge emission device for cooking food in the shape of a flat cake
WO2004025187A1 (en) * 2002-08-30 2004-03-25 BSH Bosch und Siemens Hausgeräte GmbH Baking oven having a linear pull-out element
WO2014082828A1 (en) * 2012-11-30 2014-06-05 Arcelik Anonim Sirketi Oven comprising telescopic rails
CN109247360A (en) * 2018-10-24 2019-01-22 翁清勇 It is a kind of can sliding cartonning and pull hook outlet dough fermentation case

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US3566075A (en) * 1964-12-29 1971-02-23 Sunbeam Corp Cooking device with proportioning control
JPS557A (en) * 1978-03-20 1980-01-05 Banyu Pharmaceut Co Ltd Production of ceftezole
GB2083728A (en) * 1980-09-04 1982-03-24 Ushio Electric Inc Annealing furnace
JPS5855626A (en) * 1981-09-30 1983-04-02 Tokyo Electric Co Ltd Roaster
EP0121646A1 (en) * 1983-03-15 1984-10-17 Rapelli S.A. Infra-red heated baking device and its use

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US2379820A (en) * 1942-12-17 1945-07-03 Archibald Gold Heating device
US3566075A (en) * 1964-12-29 1971-02-23 Sunbeam Corp Cooking device with proportioning control
JPS557A (en) * 1978-03-20 1980-01-05 Banyu Pharmaceut Co Ltd Production of ceftezole
GB2083728A (en) * 1980-09-04 1982-03-24 Ushio Electric Inc Annealing furnace
JPS5855626A (en) * 1981-09-30 1983-04-02 Tokyo Electric Co Ltd Roaster
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0370597A2 (en) * 1988-11-24 1990-05-30 Haruo Takase Apparatus using microwaves for thermotherapy
EP0370597A3 (en) * 1988-11-24 1992-01-02 Haruo Takase Apparatus using microwaves for thermotherapy
GB2232346A (en) * 1989-04-07 1990-12-12 Tamehiko Ikeda Infrared oven
EP0540435A1 (en) * 1991-10-30 1993-05-05 Dragomir Jovanovic Infrarouge emission device for cooking food in the shape of a flat cake
FR2683299A1 (en) * 1991-10-30 1993-05-07 Jovanovic Dragomir METHOD AND APPARATUS FOR INFRARED TRANSMISSION FOR COOKING FOOD IN THE FORM OF ROLL.
US5378872A (en) * 1991-10-30 1995-01-03 Jovanovic; Dragomir Infrared apparatus for baking pastries and pizzas
WO2004025187A1 (en) * 2002-08-30 2004-03-25 BSH Bosch und Siemens Hausgeräte GmbH Baking oven having a linear pull-out element
WO2014082828A1 (en) * 2012-11-30 2014-06-05 Arcelik Anonim Sirketi Oven comprising telescopic rails
CN109247360A (en) * 2018-10-24 2019-01-22 翁清勇 It is a kind of can sliding cartonning and pull hook outlet dough fermentation case
CN109247360B (en) * 2018-10-24 2021-04-30 上海锐趋食品科技有限公司 Dough fermenting box capable of being pushed into box and pulled out of box

Also Published As

Publication number Publication date
CH669509A5 (en) 1989-03-31
EP0236269A3 (en) 1989-01-04

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