EP1643808A2 - Oven dedicated to cooking of food - Google Patents

Oven dedicated to cooking of food Download PDF

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Publication number
EP1643808A2
EP1643808A2 EP05108934A EP05108934A EP1643808A2 EP 1643808 A2 EP1643808 A2 EP 1643808A2 EP 05108934 A EP05108934 A EP 05108934A EP 05108934 A EP05108934 A EP 05108934A EP 1643808 A2 EP1643808 A2 EP 1643808A2
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EP
European Patent Office
Prior art keywords
housing
air
oven according
cooling air
switch room
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
EP05108934A
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German (de)
French (fr)
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EP1643808B1 (en
EP1643808A3 (en
Inventor
Christian Bichlmeier
Klaus Dengler
Roland Frank
Martin Thaler
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BSH Hausgeraete GmbH
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BSH Bosch und Siemens Hausgeraete GmbH
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Publication of EP1643808A2 publication Critical patent/EP1643808A2/en
Publication of EP1643808A3 publication Critical patent/EP1643808A3/en
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/642—Cooling of the microwave components and related air circulation systems
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/6402—Aspects relating to the microwave cavity

Definitions

  • the invention relates to a furnace for cooking treatment of food by means of thermal energy and / or microwave energy, with a thermal energy absorbing or thermally sensitive components receiving, ventilation limited switch room, which is force-ventilated by means of forced cooling air to dissipate the heat in the switch room.
  • ovens for cooking treatment of foods, ovens or stoves it is common to accommodate the electrical or electronic components in a lying above the furnace muffle switch room and to cool this room, for example, with a so-called cross-flow fan.
  • a separate fan for example, a radial fan is provided for cooling the high frequency generator (magnetron).
  • inverter power supply is essentially only used either in pure microwave ovens or microwave ovens with conventional thermal heating with relatively low heat output, so that the thermal load on the environment of the treatment room, in particular the switch room in the heat-sensitive and / or electronic components and additional thermal energy dissipating devices, such as a magnetron of the microwave device is relatively low.
  • the present invention is based on the object in a furnace of the type mentioned in the best possible operating temperature in the thermally highly stressed or particularly heat-sensitive components containing switch room to obtain even when all operating modes, even if only a very limited space is available for the accommodation of these components.
  • the measure according to the invention is particularly for extremely thermally stressed, d. H. heat-emitting and / or extremely heat-sensitive components or components / units such as an inverter power supply of the microwave device created a kind of shelter within the housing, in which cooling air streams can be selectively fed by means of air guide elements and demand to be cooled points. Due to the limited space within the housing and thus the short flow paths for the cooling air is achieved so that a direct "blowing" of these components, combined with an increased vortex formation, d. H. a turbulent flow of the object-related cooling air flows and thus an optimal cooling or heat dissipation effect.
  • the housing is designed in the manner of a flow channel and is fluidly connected on the one hand to the outside air and on the other hand to the suction side of the at least one cooling air blower.
  • the housing it will be advantageous to arrange the housing with its suction side at the rear boundary of the furnace, on which furnace side, according to experience, the outside air from the furnace is the least heated.
  • the housing has a plurality of air outlet openings, which are at least partially facing the suction side of the at least one cooling air blower.
  • an air outlet opening can be assigned to a separate cooling-air fan for the magnetron of the microwave device, while a further outlet opening, for example in the form of a group of holes, can face the suction side of a cooling-air fan, which cooling-air fan in shape a cross-flow fan generally heat dissipation from the switch room is used.
  • the plurality of air outlet openings may be arranged such that, for example, mutually perpendicular exhaust air streams are formed, supported by appropriate placement of the air guide elements.
  • the housing is provided with adjustable feet and secured with air clearance on its support.
  • the housing itself is surrounded by a communicating with the outside air cushion, which provides heat dissipation to at least the lower outside of the housing.
  • the top floor of the oven shown in Figure 1 forms a switch room 1, which is surrounded on both sides by dashed lines shown side walls 2 and back by a dashed lines shown back wall 3 and upwards by a cover plate 4 and possibly also by a likewise not shown upper intermediate plate.
  • housed in this switch room 1 are electrical or electronic components for the control and regulation of so-called conventional heating elements such as a top heat / grill, a bottom heat below a likewise not shown oven muffle, which is placed directly below the switch room 1.
  • the oven should therefore be equipped with all conceivable heating elements for conventional oven operation including recirculation mode and self-cleaning mode, in which temperatures up to almost 500 degrees C occur inside or Ofenmuffel.
  • Basis of this switch room 1 is a base plate 5.
  • a microwave device is further arranged in the switch room 1 with a magnetron 6, with a Radial fan 7, on the pressure side of which a magnetron 6 leading duct 8 is arranged, and with an inverter power supply of the microwave device, which is arranged within a housing 9 explained with reference to Figures 2 and 3.
  • the magnetron 6 flowing around, now heated cooling air passes into a arranged in the front side 10 of the furnace exhaust duct 11 and from here into the open. This exhaust air flow is illustrated by arrows 12.
  • a cooling air blower 13 which is designed as a cross-flow fan and other components or component groups that are commonly used in such ovens or stoves.
  • the centrifugal fan 7 is connected with its suction side directly to the end face 14 of the housing 9, while the cooling air blower 13 is located on a longitudinal side 15 of the housing 9.
  • the housing 9 itself is arranged directly on the back of the furnace and thus also of the switch room 1 such that its air inlet openings 16, 17, 18 are connected to the oven rear side directly to the outside air.
  • 3 corresponding air inlet openings are provided, for example in the form of a hole group in the rear wall.
  • the housing 9 has a plurality of air outlet openings, for example 19, which communicate with the suction side of the radial fan 7 and an air outlet opening 20 in the form of a hole group, which faces the suction side of the cooling air blower 13.
  • the housing 9 consists of two composable and connectable molded parts 9a and 9b, wherein the molded part 9a represents the underside and the molded part 9b represents the upper side of the housing 9.
  • Figures 2 and 3 show the two mold parts 9a and 9b unfolded.
  • Each molded part 9a and 9b has behind the air inlet openings 16, 17, 18 bent and elongated air guide elements 21, 22, 23, which form a total of three substantially mutually parallel channel sections for the incoming from the outside in the direction of arrow 24 cooling air. Subsequent to these channel sections and air guide elements 21, 22 and 23 there are further air guide elements, for example 25 and 26, through which the cooling air introduced in the channel sections (arrows 24) is distributed in a swirling manner in the direction of the arrows 27, for example, in the direction of high thermal loads and therefore components of the microwave device to be cooled, for example, in the direction of a high-frequency coil 28, a heat sink 29 of the inverter power supply and in the direction of an only indicated board 30 also of the inverter power supply, which board 30 in the lower part of the housing 9 is arranged at a distance from the housing walls, so that the cooling air flow can sweep both sides of the circuit board.
  • cooling air flows through the air outlet openings 19 and 20 to the suction sides of the two cooling air blower 7, 13 and by the presence of the aforementioned air guide is obtained at least two substantially mutually perpendicular exhaust air flows in the direction of arrows 31 in the direction of the centrifugal fan 7 and in the direction of arrow 32 in the direction of the cooling-air fan 13, as illustrated in FIG.
  • the air outlet openings 20 in the form of hole groups are arranged in the upper part 9b of the housing 9, ie in the immediate vicinity of the suction side of the cooling air blower 13 and serve in particular for heat removal from the region of the power semiconductors and the high voltage transformer of the inverter power supply of the microwave device.
  • adjustable feet 33 are formed, with which the housing 9 with air clearance on the base plate 5 rests (see Figure 1 and 2). Due to this air gap 34 or gap can flow in the direction of arrow 35 cooling air and the underside of the housing 9, whereby the housing itself is forcibly cooled.

Abstract

The oven has a housing (9) containing a space (1) for electrical switches at the front (10). It incorporates an inverter net for a microwave generator. The oven assembly includes a magnetron (6). A radial fan (7) passes air through a duct (8) to the magnetron and the electrical switch space. The oven assembly includes a second ventilating fan (13) and guide ducts with entrances (16,17) at the rear of the housing.

Description

Die Erfindung bezieht sich auf einen Ofen zur Garbehandlung von Lebensmitteln mittels thermischer Energie und/oder Mikrowellenenergie, mit einem thermische Energie abgebenden bzw. thermisch empfindliche Bauelemente aufnehmenden, lüftungstechnisch begrenzten Schalterraum, der mittels erzwungener Kühlluft zur Abführung der Betriebswärme im Schalterraum zwangsbelüftet ist.The invention relates to a furnace for cooking treatment of food by means of thermal energy and / or microwave energy, with a thermal energy absorbing or thermally sensitive components receiving, ventilation limited switch room, which is force-ventilated by means of forced cooling air to dissipate the heat in the switch room.

Bei Öfen zur Garbehandlung von Lebensmitteln, bei Backöfen oder Herden ist es üblich, die elektrischen oder elektronischen Bauelemente in einem oberhalb der Ofenmuffel liegenden Schalterraum unterzubringen und diesen Raum zum Beispiel mit einem sogenannten Querstromgebläse zu kühlen. Bei Öfen mit alleiniger oder zusätzlicher Mikrowelleneinrichtung ist zur Kühlung des Hochfrequenzgenerators (Magnetron) üblicherweise ein separates Gebläse zum Beispiel ein Radialgebläse vorgesehen. Insbesondere bei sogenannten Kompaktöfen, also bei Öfen mit relativ geringen Außenabmessungen, die auch oberhalb des Küchenmöbels in Schränke oder dergleichen einbaubar sind ergeben sich Probleme zum Bespiel hinsichtlich des im Vergleich mit großen Herden kleineren Schalterraumes und dessen Kühlung, insbesondere dann, wenn der Ofen mit sämtlichen konventionellen Heizeinrichtungen wie Oberhitze, Unterhitze, Umluftheizung, pyrolytischer Selbstreinigungsbetrieb und dergleichen betrieben werden soll und wenn zusätzlich noch ein Mikrowellenbetrieb möglich sein soll. Bei Mikrowellenöfen ist es bekannt, einen sogenannten Inverternetzteil vorzusehen, welcher durch einen Leistungshalbleiter und einen Hochspannungstransformator gebildet wird. Bei bekannten Geräten wird ein derartiger Inverternetzteil im wesentlichen nur benutzt entweder bei reinen Mikrowellenöfen oder aber bei Mikrowellenöfen mit konventioneller thermischer Heizung mit relativ geringer Heizleistung, sodass die thermische Belastung der Umgebung des Behandlungsraumes, insbesondere des Schalterraumes in dem sich hitzeempfindliche und/oder elektronische Bauelemente und zusätzliche thermische Energie abgebende Bauelemente, wie zum Beispiel ein Magnetron der Mikrowelleneinrichtung befindet, relativ gering ist.In ovens for cooking treatment of foods, ovens or stoves, it is common to accommodate the electrical or electronic components in a lying above the furnace muffle switch room and to cool this room, for example, with a so-called cross-flow fan. In ovens with single or additional microwave device usually a separate fan, for example, a radial fan is provided for cooling the high frequency generator (magnetron). In particular, in so-called compact ovens, so ovens with relatively small external dimensions, which are also installed above the kitchen furniture in cabinets or the like, problems arise for example with regard to the smaller in comparison with large herds switch room and its cooling, especially if the oven with all conventional heaters such as top heat, bottom heat, convection heating, pyrolytic self-cleaning operation and the like to be operated and if in addition still a microwave operation should be possible. In microwave ovens, it is known to provide a so-called inverter power supply, which is formed by a power semiconductor and a high voltage transformer. In known devices such an inverter power supply is essentially only used either in pure microwave ovens or microwave ovens with conventional thermal heating with relatively low heat output, so that the thermal load on the environment of the treatment room, in particular the switch room in the heat-sensitive and / or electronic components and additional thermal energy dissipating devices, such as a magnetron of the microwave device is relatively low.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, bei einem Ofen der eingangs genannten Art eine bestmögliche Betriebstemperatur in dem thermisch hochbelastete oder besonders wärmeempfindliche Bauelemente enthaltenden Schalterraum auch bei Einschaltung sämtlicher Betriebsarten zu erhalten, auch dann, wenn für die Unterbringung dieser Bauelemente nur ein sehr begrenzter Raum zur Verfügung steht.The present invention is based on the object in a furnace of the type mentioned in the best possible operating temperature in the thermally highly stressed or particularly heat-sensitive components containing switch room to obtain even when all operating modes, even if only a very limited space is available for the accommodation of these components.

Diese Aufgabe wird gemäß der Erfindung bei einem Ofen der eingangs genannten Art dadurch gelöst, dass innerhalb des Schalterraumes ein, einen eng begrenzten Raum bildendes Gehäuse für thermisch hoch belastete oder wärmeempfindliche Bauelemente vorgesehen ist, dass strömungstechnisch an mindestens ein Kühlluftgebläse des Schalterraumes angeschlossen ist.This object is achieved according to the invention in an oven of the type mentioned in that within the switch room, a narrow space forming housing for thermally highly loaded or heat-sensitive components is provided that is fluidly connected to at least one cooling air blower of the switch room.

Mit der erfindungsgemäßen Maßnahme wird insbesondere für extrem thermisch belastete, d. h. wärmeabgebende und/oder für extrem wärmeempfindliche Bauelemente oder Bauelemente/Einheiten wie ein Inverternetzteil der Mikrowelleneinrichtung eine Art Schutzraum innerhalb des Gehäuses geschaffen, in welchem Kühlluftströme mittels Luftleitelementen gezielt und bedarfsgerecht den zu kühlenden Stellen zugeleitet werden können. Aufgrund des begrenzten Raumes innerhalb des Gehäuses und damit der kurzen Strömungswege für die Kühlluft erzielt man damit ein direktes "Anblasen" dieser Bauelemente, verbunden mit einer verstärkten Wirbelbildung, d. h. einer turbulenten Strömung der objektbezogenen Kühlluftströme und damit eine optimale Kühl- bzw. Wärmeabführwirkung.With the measure according to the invention is particularly for extremely thermally stressed, d. H. heat-emitting and / or extremely heat-sensitive components or components / units such as an inverter power supply of the microwave device created a kind of shelter within the housing, in which cooling air streams can be selectively fed by means of air guide elements and demand to be cooled points. Due to the limited space within the housing and thus the short flow paths for the cooling air is achieved so that a direct "blowing" of these components, combined with an increased vortex formation, d. H. a turbulent flow of the object-related cooling air flows and thus an optimal cooling or heat dissipation effect.

Gemäß einer vorteilhaften Ausgestaltung der Erfindung ist das Gehäuse nach Art eines Strömungskanals ausgebildet und ist einerseits an die Außenluft und andererseits an die Saugseite des mindestens einen Kühlluftgebläses strömungstechnisch angeschlossen. In den meisten Fällen wird es vorteilhaft sein, das Gehäuse mit seiner Saugseite an der rückwärtigen Begrenzung des Ofens anzuordnen, an welcher Ofenseite erfahrungsgemäß die Außenluft vom Ofen am geringsten erwärmt wird.According to an advantageous embodiment of the invention, the housing is designed in the manner of a flow channel and is fluidly connected on the one hand to the outside air and on the other hand to the suction side of the at least one cooling air blower. In most cases, it will be advantageous to arrange the housing with its suction side at the rear boundary of the furnace, on which furnace side, according to experience, the outside air from the furnace is the least heated.

Gemäß einer vorteilhaften Ausgestaltung der Erfindung weist das Gehäuse mehrere Luft-Austrittsöffnungen auf, die zumindest teilweise der Saugseite des zumindest einen Kühlluftgebläses zugewandt sind. So kann zum Beispiel eine Luft-Austrittsöffnung einem separaten Kühlluftgebläse für das Magnetron der Mikrowelleneinrichtung zugeordnet sein, während eine weitere Austrittsöffnung zum Beispiel in Form einer Lochgruppe der Saugseite eines Kühlluftgebläses zugewandt sein kann, welches Kühlluftgebläse in Form eines Querstromlüfters allgemein der Wärmeabführung aus dem Schalterraum dient. Die mehreren Luft-Austrittsöffnungen können derart angeordnet sein, dass zum Beispiel senkrecht aufeinanderstehende Abluftströme gebildet werden, unterstützt durch entsprechende Platzierung der Luftleitelemente.According to an advantageous embodiment of the invention, the housing has a plurality of air outlet openings, which are at least partially facing the suction side of the at least one cooling air blower. Thus, for example, an air outlet opening can be assigned to a separate cooling-air fan for the magnetron of the microwave device, while a further outlet opening, for example in the form of a group of holes, can face the suction side of a cooling-air fan, which cooling-air fan in shape a cross-flow fan generally heat dissipation from the switch room is used. The plurality of air outlet openings may be arranged such that, for example, mutually perpendicular exhaust air streams are formed, supported by appropriate placement of the air guide elements.

Es ist vorteilhaft, wenn das Gehäuse mit Stellfüßen versehen und mit Luftabstand an seinem Träger befestigt ist. Auf diese Weise wird das Gehäuse selbst von einem mit der Außenluft kommunizierenden Luftpolster umgeben, welches für eine Wärmeabführung an zumindest der unteren Außenseite des Gehäuses sorgt.It is advantageous if the housing is provided with adjustable feet and secured with air clearance on its support. In this way, the housing itself is surrounded by a communicating with the outside air cushion, which provides heat dissipation to at least the lower outside of the housing.

Weitere Einzelheiten der Erfindung ergeben sich aus dem in der Zeichnung dargestellten und nachstehend beschriebenen Ausführungsbeispielen.Further details of the invention will become apparent from the illustrated in the drawings and described below embodiments.

Es zeigt:

Figur 1
Ansicht auf die offene Oberseite eines nicht weiter dargestellten Ofens,
Figur 2 und 3
das Gehäuse gemäß Figur 1, bestehend aus einem unteren Formteil (Figur 2) und einem oberen Formteil (Figur 3).
It shows:
FIG. 1
View on the open top of a furnace, not shown,
FIGS. 2 and 3
the housing according to Figure 1, consisting of a lower mold part (Figure 2) and an upper mold part (Figure 3).

Die in Figur 1 gezeigte oberste Etage des Ofens bildet einen Schalterraum 1, der an beiden Seiten umgeben ist von nur gestrichelt dargestellten Seitenwänden 2 und rückseitig durch eine ebenfalls gestrichelt dargestellte Rückwand 3 und nach oben hin durch eine Deckplatte 4 und ggf. noch durch eine ebenfalls nicht dargestellte obere Zwischenplatte. In diesem Schalterraum 1 untergebracht sind elektrische oder elektronische Bauelemente für die Steuerung und Regelung von sogenannten konventionellen Heizelementen wie eine Oberhitze/Grill, eine Unterhitze unterhalb einer ebenfalls nicht dargestellten Ofenmuffel, die unmittelbar unterhalb des Schalterraumes 1 platziert ist. Der Ofen soll also ausgerüstet sein mit sämtlichen denkbaren Heizelementen für den konventionellen Ofenbetrieb einschließlich Umluftbetrieb und Selbstreinigungsbetrieb, bei dem im Inneren oder Ofenmuffel Temperaturen bis zu nahezu 500 Grad C auftreten. Basis dieses Schalterraumes 1 ist eine Grundplatte 5. Da der Ofen auch für den Mikrowellenbetrieb eingerichtet sein soll, ist im Schalterraum 1 ferner eine Mikrowelleneinrichtung angeordnet mit einem Magnetron 6, mit einem Radiallüfter 7, an dessen Druckseite ein zum Magnetron 6 führender Luftschacht 8 angeordnet ist, sowie mit einem Inverternetzteil der Mikrowelleneinrichtung, welcher innerhalb eines anhand der Figuren 2 und 3 erklärten Gehäuses 9 angeordnet ist. Die das Magnetron 6 umströmende, nunmehr erwärmte Kühlluft gelangt in einen im Bereich der Frontseite 10 des Ofens angeordneten Abluftschacht 11 und von hier aus ins Freie. Diese Abluftströmung ist durch Pfeile 12 verdeutlicht. Ferner sind im Schalterraum 1 untergebracht ein Kühlluftgebläse 13, das als Querstromlüfter ausgebildet ist sowie weitere Bauelemente oder Bauelementegruppen, die üblicherweise bei derartigen Öfen oder Herden verwendet werden. Wie ferner in Figur 1 gezeigt, ist der Radiallüfter 7 mit seiner Saugseite unmittelbar an die Stirnseite 14 des Gehäuses 9 angeschlossen, während sich das Kühlluftgebläse 13 an einer Längsseite 15 des Gehäuses 9 befindet. Das Gehäuse 9 selbst ist unmittelbar an der Rückseite des Ofens und damit auch des Schalterraumes 1 derart angeordnet, dass seine Lufteintrittsöffnungen 16, 17, 18 an der Ofenrückseite unmittelbar an die Außenluft angeschlossen sind. Hierzu sind in der Rückwand 3 entsprechende Lufteintrittsöffnungen zum Beispiel in Form einer Lochgruppe vorgesehen.The top floor of the oven shown in Figure 1 forms a switch room 1, which is surrounded on both sides by dashed lines shown side walls 2 and back by a dashed lines shown back wall 3 and upwards by a cover plate 4 and possibly also by a likewise not shown upper intermediate plate. Housed in this switch room 1 are electrical or electronic components for the control and regulation of so-called conventional heating elements such as a top heat / grill, a bottom heat below a likewise not shown oven muffle, which is placed directly below the switch room 1. The oven should therefore be equipped with all conceivable heating elements for conventional oven operation including recirculation mode and self-cleaning mode, in which temperatures up to almost 500 degrees C occur inside or Ofenmuffel. Basis of this switch room 1 is a base plate 5. Since the oven should also be set up for microwave operation, a microwave device is further arranged in the switch room 1 with a magnetron 6, with a Radial fan 7, on the pressure side of which a magnetron 6 leading duct 8 is arranged, and with an inverter power supply of the microwave device, which is arranged within a housing 9 explained with reference to Figures 2 and 3. The magnetron 6 flowing around, now heated cooling air passes into a arranged in the front side 10 of the furnace exhaust duct 11 and from here into the open. This exhaust air flow is illustrated by arrows 12. Further, in the switch room 1 housed a cooling air blower 13, which is designed as a cross-flow fan and other components or component groups that are commonly used in such ovens or stoves. As further shown in Figure 1, the centrifugal fan 7 is connected with its suction side directly to the end face 14 of the housing 9, while the cooling air blower 13 is located on a longitudinal side 15 of the housing 9. The housing 9 itself is arranged directly on the back of the furnace and thus also of the switch room 1 such that its air inlet openings 16, 17, 18 are connected to the oven rear side directly to the outside air. For this purpose, 3 corresponding air inlet openings are provided, for example in the form of a hole group in the rear wall.

Wie anhand von Figur 1 und der Figuren 2 und 3 erläutert, besitzt das Gehäuse 9 mehrere Luftaustrittsöffnungen, zum Beispiel 19, die mit der Saugseite des Radiallüfters 7 kommunizieren sowie eine Luftaustrittsöffnung 20 in Form einer Lochgruppe, die der Saugseite des Kühlluftgebläses 13 zugewandt ist. Das Gehäuse 9 besteht aus zwei zusammensetzbaren und verbindbaren Formteilen 9a und 9b, wobei der Formteil 9a die Unterseite und der Formteil 9b die Oberseite des Gehäuses 9 darstellt. Die Figuren 2 und 3 zeigen die beiden Formteile 9a und 9b auseinandergeklappt. Jeder Formteil 9a und 9b besitzt hinter den Lufteintrittsöffnungen 16, 17, 18 gebogene und langgestreckte Luftleitelemente 21, 22, 23, welche insgesamt drei im wesentlichen parallel zueinander verlaufende Kanalabschnitte für die von außen her in Pfeilrichtung 24 einströmende Kühlluft bilden. Anschließend an diese Kanalabschnitte und Luftleitelemente 21, 22 und 23 befinden sich weitere Luftleitelemente, zum Beispiel 25 und 26, durch welche die in den Kanalabschnitten herangeführte Kühlluft (Pfeile 24) verwirbelnd in Richtung zum Beispiel der Pfeile 27 verteilt wird in Richtung von thermisch hoch belasteten und daher zu kühlenden Bauelementen der Mikrowelleneinrichtung zum Beispiel in Richtung einer Hochfrequenzspule 28, eines Kühlkörpers 29 des Inverternetzteils sowie in Richtung einer nur angedeuteten Platine 30 ebenfalls des Inverternetzteils, welche Platine 30 im Unterteil des Gehäuses 9 mit Abstand zu den Gehäusewänden angeordnet ist, so dass die Kühlluftströmung beide Platinenseiten umstreichen kann. Durch die strömungstechnische Ankopplung der im Inneren des Gehäuses 9 strömenden Kühlluftströme über die Luftaustrittsöffnungen 19 und 20 an die Saugseiten der beiden Kühlluftgebläse 7, 13 sowie durch das Vorhandensein der vorgenannten Luftleitelemente erhält man wenigstens zwei im wesentlichen senkrecht aufeinanderstehende Abluftströmungen in Richtung der Pfeile 31 in Richtung des Radiallüfters 7 und in Pfeilrichtung 32 in Richtung zum Kühlluftgebläse 13, wie in Figur 1 verdeutlicht. Die Luftaustrittsöffnungen 20 in Form von Lochgruppen sind im Oberteil 9b des Gehäuses 9, also in unmittelbarer des Nähe der Saugseite des Kühlluftgebläses 13 angeordnet und dienen insbesondere zur Wärmeabführung aus dem Bereich der Leistungshalbleiter und des Hochspannungstransformators des Inverternetzteils der Mikrowelleneinrichtung. Am Bodenteil des Formteils 9a des Gehäuses 9 sind Stellfüße 33 angeformt, mit welchen das Gehäuse 9 mit Luftabstand auf der Grundplatte 5 ruht (siehe Figur 1 und 2). Aufgrund dieses Luftabstandes 34 oder Spaltes kann in Pfeilrichtung 35 Kühlluft auch die Unterseite des Gehäuses 9 umströmen, womit auch das Gehäuse selbst zwangsgekühlt wird.As explained with reference to Figure 1 and Figures 2 and 3, the housing 9 has a plurality of air outlet openings, for example 19, which communicate with the suction side of the radial fan 7 and an air outlet opening 20 in the form of a hole group, which faces the suction side of the cooling air blower 13. The housing 9 consists of two composable and connectable molded parts 9a and 9b, wherein the molded part 9a represents the underside and the molded part 9b represents the upper side of the housing 9. Figures 2 and 3 show the two mold parts 9a and 9b unfolded. Each molded part 9a and 9b has behind the air inlet openings 16, 17, 18 bent and elongated air guide elements 21, 22, 23, which form a total of three substantially mutually parallel channel sections for the incoming from the outside in the direction of arrow 24 cooling air. Subsequent to these channel sections and air guide elements 21, 22 and 23 there are further air guide elements, for example 25 and 26, through which the cooling air introduced in the channel sections (arrows 24) is distributed in a swirling manner in the direction of the arrows 27, for example, in the direction of high thermal loads and therefore components of the microwave device to be cooled, for example, in the direction of a high-frequency coil 28, a heat sink 29 of the inverter power supply and in the direction of an only indicated board 30 also of the inverter power supply, which board 30 in the lower part of the housing 9 is arranged at a distance from the housing walls, so that the cooling air flow can sweep both sides of the circuit board. Due to the fluidic coupling of the flowing inside the housing 9 cooling air flows through the air outlet openings 19 and 20 to the suction sides of the two cooling air blower 7, 13 and by the presence of the aforementioned air guide is obtained at least two substantially mutually perpendicular exhaust air flows in the direction of arrows 31 in the direction of the centrifugal fan 7 and in the direction of arrow 32 in the direction of the cooling-air fan 13, as illustrated in FIG. The air outlet openings 20 in the form of hole groups are arranged in the upper part 9b of the housing 9, ie in the immediate vicinity of the suction side of the cooling air blower 13 and serve in particular for heat removal from the region of the power semiconductors and the high voltage transformer of the inverter power supply of the microwave device. At the bottom part of the molding 9a of the housing 9 adjustable feet 33 are formed, with which the housing 9 with air clearance on the base plate 5 rests (see Figure 1 and 2). Due to this air gap 34 or gap can flow in the direction of arrow 35 cooling air and the underside of the housing 9, whereby the housing itself is forcibly cooled.

Claims (9)

Ofen zur Garbehandlung von Lebensmittels mittels thermischer Energie und/oder Mikrowellenenergie, mit einem Schalterraum (1), der thermische Energie abgebende bzw. thermisch empfindliche Bauelemente (6, 28, 29, 30) eingrenzt und der mittels erzwungener Kühlluft zur Abführung der Betriebswärme im Schalterraum (1) zwangsbelüftet ist, dadurch gekennzeichnet, dass innerhalb des Schalterraumes (1) ein Gehäuse (9) für thermisch hochbelastete oder wärmeempfindliche Bauelemente (6, 28, 29, 30) vorgesehen ist, das strömungstechnisch mit mindestens einem Kühlluftgebläse (7, 13) des Schalterraumes (1) in Verbindung ist.Furnace for cooking treatment of food by means of thermal energy and / or microwave energy, with a switch room (1), the thermal energy dissipating or thermally sensitive components (6, 28, 29, 30) confined and by means of forced cooling air to dissipate the heat of operation in the switch room (1) is positively ventilated, characterized in that within the switch compartment (1) a housing (9) for thermally highly stressed or heat-sensitive components (6, 28, 29, 30) is provided, which fluidly with at least one cooling air blower (7, 13) the switch room (1) is in communication. Ofen nach Anspruch 1, dadurch gekennzeichnet, dass das Gehäuse (9) nach Art eines Strömungskanals ausgebildet und einerseits an die Außenluft und andererseits and die Saugseite des mindestens einen Kühlluftgebläses (7, 13) strömungstechnisch angeschlossen ist.Oven according to claim 1, characterized in that the housing (9) formed in the manner of a flow channel and on the one hand to the outside air and on the other hand to the suction side of the at least one cooling air blower (7, 13) is fluidly connected. Ofen nach Anspruch 2, dadurch gekennzeichnet, dass im Gehäuse (9) Luftleitelemente (25, 26) angeordnet sind, durch welche im Gehäuse (9) mehrere Kühlluftströme (24) zu einzelnen Bauelementen (28, 29, 30) oder Gruppen von Bauelementen geleitet werden.Oven according to claim 2, characterized in that in the housing (9) air guide elements (25, 26) are arranged, through which in the housing (9) a plurality of cooling air streams (24) to individual components (28, 29, 30) or groups of components passed become. Ofen nach Anspruch 3, dadurch gekennzeichnet, dass an der Luft-Eintrittseite (16, 17, 18) mehrere im wesentlichen parallel verlaufende Kanalabschnitte durch langgestreckte Luftleitelemente (21, 22, 23) gebildet sind.Oven according to claim 3, characterized in that at the air inlet side (16, 17, 18) a plurality of substantially parallel channel sections are formed by elongated air guide elements (21, 22, 23). Ofen nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Gehäuse (9) mehrere Luft-Austrittsöffnungen (19, 20) aufweist, die zumindest teilweise der Saugseite des zumindest einen Kühlgebläses (7, 13) zugewandt sind.Oven according to one of the preceding claims, characterized in that the housing (9) has a plurality of air outlet openings (19, 20) which at least partially face the suction side of the at least one cooling fan (7, 13). Ofen nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zumindest eine Luftaustrittsöffnung (20) als Lochgruppe ausgebildet ist.Oven according to one of the preceding claims, characterized in that at least one air outlet opening (20) is formed as a hole group. Ofen nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Gehäuse (9) aus zwei Formteilen (9a, 9b) gebildet ist und dass beide Formteile Luftleitelemente (25, 26) aufweisen.Oven according to one of the preceding claims, characterized in that the housing (9) consists of two molded parts (9a, 9b) is formed and that both mold parts air guide elements (25, 26). Ofen nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Gehäuse (9) mit Stellfüßen (33) versehen und mit Luftabstand (34) an seinem Träger (5) befestigt ist.Oven according to one of the preceding claims, characterized in that the housing (9) provided with adjustable feet (33) and with air clearance (34) on its support (5) is attached. Ofen nach einem der vorhergehenden Ansprüche für den Betrieb mit thermischen Heizelementen und mit Mikrowellenenergie einer Mikrowelleneinrichtung, dadurch gekennzeichnet, dass in dem Gehäuse (9) zumindest der Inverternetzteil der Mikrowelleneinrichtung angeordnet ist.Oven according to one of the preceding claims for operation with thermal heating elements and with microwave energy of a microwave device, characterized in that in the housing (9) at least the inverter power supply of the microwave device is arranged.
EP05108934A 2004-10-01 2005-09-28 Oven dedicated to cooking of food Active EP1643808B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004047992A DE102004047992A1 (en) 2004-10-01 2004-10-01 Oven for the treatment of food by food

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EP1643808A2 true EP1643808A2 (en) 2006-04-05
EP1643808A3 EP1643808A3 (en) 2008-02-20
EP1643808B1 EP1643808B1 (en) 2012-01-18

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Publication number Priority date Publication date Assignee Title
DE102006051502B4 (en) 2006-10-31 2023-06-01 BSH Hausgeräte GmbH Oven for cooking food
DE102020215494A1 (en) 2020-12-08 2022-06-09 Wilhelm Bruckbauer Device for heating food

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US20040149752A1 (en) 2002-12-20 2004-08-05 Matsushita Electric Industrial Co., Ltd. High frequency heating apparatus

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EP1643808B1 (en) 2012-01-18
ATE542395T1 (en) 2012-02-15
EP1643808A3 (en) 2008-02-20
DE102004047992A1 (en) 2006-04-06

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