EP3225079B1 - Cooking household appliance - Google Patents

Cooking household appliance Download PDF

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Publication number
EP3225079B1
EP3225079B1 EP15791547.1A EP15791547A EP3225079B1 EP 3225079 B1 EP3225079 B1 EP 3225079B1 EP 15791547 A EP15791547 A EP 15791547A EP 3225079 B1 EP3225079 B1 EP 3225079B1
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EP
European Patent Office
Prior art keywords
trap
door
microwave
cooking appliance
muffle
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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EP15791547.1A
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German (de)
French (fr)
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EP3225079A1 (en
Inventor
Mathias Frey
Wojciech Gwarek
Markus Kuchler
Andreas Nitschke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Publication of EP3225079A1 publication Critical patent/EP3225079A1/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
    • H05B6/76—Prevention of microwave leakage, e.g. door sealings
    • H05B6/763—Microwave radiation seals for doors

Definitions

  • the present invention relates to a domestic cooking appliance.
  • microwave leakage rate is understood to mean a microwave power per unit area escaping from the domestic cooking appliance.
  • the US 4,794,218A describes a door for a microwave oven.
  • a microwave trap connected thereto is provided on the door.
  • the microwave trap has slots.
  • the U.S. 2011/0290230 A1 describes a domestic cooking appliance with a door that has a microwave trap.
  • the microwave trap is slotted.
  • the WO 00/36878 A1 also describes a domestic cooking appliance with a door having a microwave trap.
  • the DE 34 09 563 A1 describes a microwave oven with an oven muffle that can be closed in a microwave-tight manner by a hinged oven door, into which a waveguide of a microwave generator flows, with a microwave shield that dips into the oven muffle in the closed position being attached to the inside of the door and has a high-frequency choke at the edge area, with detachable fastening elements being provided, on which the microwave shield can be adjusted and fixed relative to the furnace muffle in three mutually perpendicular directions
  • the EP 1 401 244 A2 describes a microwave oven with a door that is curved at least in sections.
  • an object of the present invention is to provide an improved domestic cooking appliance.
  • a domestic cooking appliance with a magnetron for generating microwaves, a muffle for receiving food to be cooked, a door for closing the muffle and a microwave trap, which is arranged between a muffle flange of the muffle and a door bottom of the door, the door bottom being curved.
  • the microwave trap can be bent in order to adapt its contour to the curved door base, wherein the microwave trap is attached to the curved door base and the muffle flange is curved to correspond to the door base, so that a uniform door gap is provided between the muffle flange and the door base.
  • the bottom of the door is spherically arched.
  • the microwave trap is adapted to the curvature of the bottom of the door, which improves the trap effect in corner areas of the door.
  • the microwave trap and the door base are preferably manufactured separately and then assembled. This enables the necessary bending and pressing tools to be designed in a simple and cost-effective manner, since the curvature of the microwave trap would otherwise result in considerable manufacturing effort.
  • the door bottom is preferably square.
  • the domestic cooking appliance can be, for example, a microwave oven or an oven with a microwave function.
  • the muffle flange is curved to correspond to the door bottom, so that a uniform door gap is provided between the muffle flange and the door bottom.
  • the bottom of the door is spherically arched.
  • a first section or fastening section of the door base is preferably curved in a spherical shape, in particular in a hemispherical shape.
  • the bottom of the door is curved in the shape of a segment of a sphere.
  • the door base is concave with respect to the muffle.
  • the curvature of the bottom of the door points away from the muffle.
  • the door base and the microwave trap are separate components.
  • the microwave trap is bent from a comb-shaped sheet metal component. Because the door base and the microwave trap are designed as separate components, the microwave trap can be aligned exactly with the door base when it is connected to it.
  • the microwave trap is welded, in particular laser-welded, to the bottom of the door.
  • the microwave trap can be positioned in a welding tool relative to the bottom of the door, as a result of which close tolerance requirements can be met.
  • the microwave trap is a quarter-wave trap.
  • the microwave trap is comb-shaped.
  • the microwave trap has an attachment section for attaching the microwave trap to the door bottom and a trap section, the trap section being slotted in such a way that it has alternating trap teeth and trap slots.
  • a ratio of a latch tooth width of the latch teeth to a latch slot width of the latch slots is two.
  • the catch teeth preferably have a width of 3 to 5 millimeters, more preferably 3.5 to 4.5 millimeters, more preferably 4 millimeters.
  • the trap slits preferably have a width of 1 to 3 millimeters, more preferably 1.5 to 2.5 millimeters, more preferably 2 millimeters.
  • the repeating period is preferably 6 millimeters wide with a ratio of latch tooth width to latch slot width of 2.
  • the 1 shows a schematic perspective view of a domestic cooking appliance 1.
  • the domestic cooking appliance 1 has a magnetron 2 for generating microwaves.
  • the household cooking appliance 1 can be, for example, a microwave oven or an oven with a microwave function.
  • the domestic cooking appliance 1 also has a cooking chamber 3 which is surrounded by a muffle 4 of the domestic cooking appliance 1 .
  • the muffle 4 can be closed.
  • the muffle 4 has, in particular, a cuboid geometry.
  • a muffle flange 6 of the muffle 4 is provided on the front side.
  • the door 5 can be pivotally attached to the muffle flange 6 .
  • the door 5 can be pivotally attached to the muffle flange 6 at a lower end.
  • the door 5 can also be hinged on the side or attached to a pull-out baking trolley.
  • a handle 8 can be arranged on an upper section 7 of the door 5 . In the 1 the door 5 is shown in a half-open state.
  • the 2 and 3 each show a schematic sectional view through the upper section 7 of the door 5 with the muffle flange 6.
  • the door 5 is of a 2 and 3 shown closed state in the direction of an arrow 9 in the 1 shown foldable when open.
  • a microwave trap 11 is arranged between the muffle flange 6 and a door bottom 10 of the door 5 .
  • the door bottom 10 can be a sheet steel.
  • the microwave trap 11 is designed to prevent microwaves from escaping from the cooking chamber 3 .
  • the microwave trap 11 is in particular a so-called quarter-wave trap.
  • the door 5 can enclose the microwave trap 11 .
  • the door 5 further comprises a cover frame 12 for covering the microwave trap 11 and a sealing device 13 fitted between the cover frame 12 and the door bottom 10.
  • the cover frame 12 is preferably made of a plastic material.
  • the sealing device 13 is attached to the cover frame 12 .
  • the cover frame 12 is part of the door 5.
  • the sealing device 13 has a sealing lip 14 which is designed to seal the door 5 from the muffle flange 6.
  • the sealing lip 14 is preferably resiliently deformable.
  • the sealing device 13 is made of a temperature-resistant plastic material.
  • the door bottom 10 has an attachment portion or first portion 15 to which the microwave trap 11 is attached. Furthermore, the door bottom 10 has a second section 16 arranged perpendicular to the first section 15 . The sealing device 13 is arranged between the second section 16 and the cover frame 12 .
  • the microwave trap 11 has an attachment section 17 which is attached to the first section 15 of the door bottom 15 .
  • the fastening section 17 is preferably welded to the first section 15 of the door base 10, in particular laser-welded.
  • the microwave trap 11 also has a trap section 18 .
  • the trap portion 18 is configured to reduce a microwave leak rate of the home cooking appliance 1 . Microwave leak rate is to be understood as meaning a microwave output per unit area escaping from the domestic cooking appliance 1 .
  • the latch portion 18 is spaced a distance d from the second portion 16 of the door bottom 10 .
  • the 4 and 5 each show the microwave trap 11 in a schematic perspective view.
  • the microwave trap 11 is slotted except for the attachment section 17 .
  • the latch section 18 is slotted in such a way that it has alternating folding teeth 19 and latch slots 20 . Due to the deep slits in the microwave trap 11, it can be deformed or bent as desired.
  • the microwave trap 11 is preferably designed in the form of a comb.
  • the 6 shows the first section 15 of the door bottom 10 in a schematic perspective view.
  • the muffle 4 is arranged behind the door bottom 10 .
  • the door bottom 10 and in particular the first section 15 of the door bottom 10 is spherically curved.
  • the door bottom 10 is spherical, in particular hemispherical, arched. Due to the fact that the microwave trap 11 can be bent, its contour can be adapted to the arched bottom 10 of the door.
  • the muffle flange 6 is curved corresponding to the door bottom 10, so that a uniform door gap s ( 2 ) is provided.
  • the door bottom 10 is preferably curved concavely with respect to the muffle 4 . That is, the door bottom 10 is curved away from the muffle 4 .
  • the door bottom 10 and the microwave trap 11 are, in particular, separate components.
  • the microwave trap 11 and the door base 10 are mechanically and electrically connected.
  • the microwave trap 11 and the door bottom 10 can be welded.
  • the still unconnected components can be positioned exactly to one another in a tool of a welding device, so that in particular the distance d can be maintained with great precision.
  • the microwave radiation prevailing inside the muffle 4 strikes the microwave trap 11 at different angles of incidence ⁇ .
  • the effectively effective trap length of an unslotted microwave trap increases by a factor of 1/cos ( ⁇ ).
  • the effective frequency also varies with the effective trap length, so that a microwave trap that is not slotted no longer works optimally at any angle of incidence. This effect is particularly pronounced in household cooking appliances with large muffle dimensions, since different angles of incidence can occur in a very broad spectrum. If the microwave trap is not divided by slots, surface currents can flow unhindered in the direction of wave propagation.
  • the trap slits 20 of the microwave trap 11 described above prevent this and deflect the surface currents in the direction of the slit, so that the associated Microwaves have a much smaller angle of incidence ⁇ , which is so small that the incident situation almost corresponds to a microwave arriving in the normal direction.
  • the microwave trap 11 is bent from a metal comb whose trap teeth 19 have, for example, a trap tooth width b19 of four millimeters and a trap slot width b20 of the trap slots 20 of, for example, two millimeters ( 4 ).
  • the repeating period is then six millimeters wide and has a ratio of latch tooth width b19 to latch slot width b20 of two.
  • the effective length of the microwave trap 11 is only increased by 0.9% at a normal operating frequency of the household cooking appliance 1 of 2.45 GHz.
  • a quarter-wave length is 30.5 millimeters long, while a 19-tooth ratchet is four millimeters wide.
  • the very deep trap slits 20 in combination with a large number of trap slits 20 per unit of length make the microwave trap 11 flexible and enable the contour of the microwave trap 11 to be adapted to any curved surface of the door base 10 .
  • the curvature of the microwave trap 11 results in a better wave blocking effect in corner areas of the door 5.
  • the door bottom 10 onto which the microwave trap 11 is welded is concave in shape, so that the curvature points away from the muffle 4 .
  • the microwave trap 11 can be inserted into the arched contour of the door base 10 and connected to it without mechanical stress.
  • the opposite muffle flange 6 of the household cooking appliance 1 is also adapted to this contour and has a correspondingly convex shape.
  • the advantage of the household cooking appliance 1 described above over known household cooking appliances lies in the better blocking effect of electromagnetic radiation escaping through the door gap s.
  • the special design of the microwave trap 11 with deep trap slots 20 is electrodynamically advantageous and enables simple and stress-free installation on curved surfaces, the curved arrangement of the microwave trap 11 in turn having a positive effect on the wave blocking in corner areas of the door 5.
  • the bottom of the door and the microwave trap are usually made from a common sheet metal blank.
  • the separation of microwave trap 11 and door base 10 into two separate components, which are manufactured separately and then joined together, has an advantageous effect on a simple design of the necessary bending and pressing tools, since the curvature would otherwise result in considerable effort.
  • the separation of components is also advantageous in that the shaping of the door base 10 and the bending of the microwave trap 11 take place separately, and the tolerances of the respective processes can therefore be controlled and influenced separately from one another.
  • the deep slitting of the microwave trap 11 also leads to a more robust joining process when connecting the microwave trap 11 and the door base 10, since the microwave trap 11 nestles against the first section 15 of the door base 10 and can easily compensate for fluctuations in curvature and discontinuities in the first section 15. In this way, the risk of a gap forming in places between the microwave trap 11 and the first section 15 of the door base 10 is significantly reduced.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Ovens (AREA)
  • Constitution Of High-Frequency Heating (AREA)

Description

Die vorliegende Erfindung betrifft ein Haushaltsgargerät.The present invention relates to a domestic cooking appliance.

Bei Haushaltsgargeräten mit einem Magnetron zum Erzeugen von Mikrowellen sind zur Abschirmung und Reduzierung der Mikrowellenleckrate des Haushaltsgargeräts verschiedene Mikrowellenfallensysteme bekannt. Unter Mikrowellenleckrate ist eine aus dem Haushaltsgargerät austretende Mikrowellenleistung pro Flächeneinheit zu verstehen.In household cooking appliances with a magnetron for generating microwaves, various microwave trap systems are known for shielding and reducing the microwave leakage rate of the household cooking appliance. The microwave leakage rate is understood to mean a microwave power per unit area escaping from the domestic cooking appliance.

Die US 4,794,218 A beschreibt eine Tür für ein Mikrowellengerät. An der Tür ist eine mit dieser verbundene Mikrowellenfalle vorgesehen. Die Mikrowellenfalle weist Schlitze auf.The US 4,794,218A describes a door for a microwave oven. A microwave trap connected thereto is provided on the door. The microwave trap has slots.

Die US 2011/0290230 A1 beschreibt ein Haushaltsgargerät mit einer Tür, die eine Mikrowellenfalle aufweist. Die Mikrowellenfalle ist geschlitzt.The U.S. 2011/0290230 A1 describes a domestic cooking appliance with a door that has a microwave trap. The microwave trap is slotted.

Die WO 00/36878 A1 beschreibt ebenfalls ein Haushaltsgargerät mit einer Tür, die eine Mikrowellenfalle aufweist.The WO 00/36878 A1 also describes a domestic cooking appliance with a door having a microwave trap.

Die DE 34 09 563 A1 beschreibt einen Mikrowellenofen mit einer durch eine klappbare Ofentür mikrowellendicht verschließbaren Ofenmuffel, in die ein Wellenleiter eines Mikrowellengenerators einmündet, wobei an der Türinnenseite ein in der Schließstellung in die Ofenmuffel eintauchender Mikrowellenschild befestigt ist, der am Randbereich eine Hochfrequenzdrossel besitzt, wobei lösbare Befestigungselemente vorgesehen sind, an denen der Mikrowellenschild in drei jeweils senkrecht aufeinander stehenden Richtungen relativ gegenüber der Ofenmuffel verstellbar und feststellbar istThe DE 34 09 563 A1 describes a microwave oven with an oven muffle that can be closed in a microwave-tight manner by a hinged oven door, into which a waveguide of a microwave generator flows, with a microwave shield that dips into the oven muffle in the closed position being attached to the inside of the door and has a high-frequency choke at the edge area, with detachable fastening elements being provided, on which the microwave shield can be adjusted and fixed relative to the furnace muffle in three mutually perpendicular directions

Die EP 1 401 244 A2 beschreibt ein Mikrowellengerät mit einer zumindest abschnittsweise gewölbten Tür.The EP 1 401 244 A2 describes a microwave oven with a door that is curved at least in sections.

Vor diesem Hintergrund besteht eine Aufgabe der vorliegenden Erfindung darin, ein verbessertes Haushaltsgargerät zur Verfügung zu stellen.Against this background, an object of the present invention is to provide an improved domestic cooking appliance.

Demgemäß wird ein Haushaltsgargerät mit einem Magnetron zur Erzeugung von Mikrowellen, einer Muffel zum Aufnehmen von Gargut, einer Tür zum Verschließen der Muffel und einer Mikrowellenfalle vorgeschlagen, die zwischen einem Muffelflansch der Muffel und einem Türboden der Tür angeordnet ist, wobei der Türboden gewölbt ist, wobei die Mikrowellenfalle biegbar ist, um deren Kontur an den gewölbten Türboden anzupassen, wobei die Mikrowellenfalle am gewölbten Türboden befestigt ist und wobei der Muffelflansch korrespondierend zum Türboden gewölbt ist, so dass zwischen dem Muffelflansch und dem Türboden ein gleichmäßiger Türspalt vorgesehen ist. Der Türboden ist kugelförmig gewölbt. Die Mikrowellenfalle ist an die Wölbung des Türbodens angepasst, wodurch sich die Fallenwirkung in Eckbereichen der Tür verbessert.Accordingly, a domestic cooking appliance is proposed with a magnetron for generating microwaves, a muffle for receiving food to be cooked, a door for closing the muffle and a microwave trap, which is arranged between a muffle flange of the muffle and a door bottom of the door, the door bottom being curved. wherein the microwave trap can be bent in order to adapt its contour to the curved door base, wherein the microwave trap is attached to the curved door base and the muffle flange is curved to correspond to the door base, so that a uniform door gap is provided between the muffle flange and the door base. The bottom of the door is spherically arched. The microwave trap is adapted to the curvature of the bottom of the door, which improves the trap effect in corner areas of the door.

Dadurch, dass der Türboden gewölbt ist und die Mikrowellenfalle an die Wölbung des Türbodens angepasst ist, wird die Fallenwirkung insbesondere in Eckbereichen der Tür verbessert. Die Mikrowellenfalle und der Türboden werden vorzugsweise separat gefertigt und dann zusammengefügt. Dies ermöglicht eine einfache und kostengünstige Gestaltung der notwendigen Biege- und Presswerkzeuge, da aufgrund der Krümmung der Mikrowellenfalle ansonsten ein erheblicher Fertigungsaufwand entstehen würde. Der Türboden ist vorzugsweise quadratisch. Das Haushaltsgargerät kann beispielsweise ein Mikrowellengerät oder ein Backofen mit Mikrowellenfunktion sein.Due to the fact that the bottom of the door is curved and the microwave trap is adapted to the curvature of the bottom of the door, the trap effect is improved, particularly in the corner areas of the door. The microwave trap and the door base are preferably manufactured separately and then assembled. This enables the necessary bending and pressing tools to be designed in a simple and cost-effective manner, since the curvature of the microwave trap would otherwise result in considerable manufacturing effort. The door bottom is preferably square. The domestic cooking appliance can be, for example, a microwave oven or an oven with a microwave function.

Der Muffelflansch ist korrespondierend zum Türboden gewölbt, so dass zwischen dem Muffelflansch und dem Türboden ein gleichmäßiger Türspalt vorgesehen ist.The muffle flange is curved to correspond to the door bottom, so that a uniform door gap is provided between the muffle flange and the door bottom.

Dies verbessert die Fallenwirkung der Mikrowellenfalle.This improves the trapping effect of the microwave trap.

Der Türboden ist kugelförmig gewölbt.The bottom of the door is spherically arched.

Vorzugsweise ist ein erster Abschnitt oder Befestigungsabschnitt des Türbodens kugelförmig, insbesondere halbkugelförmig, gewölbt. Insbesondere ist der Türboden kugelabschnittsförmig gewölbt.A first section or fastening section of the door base is preferably curved in a spherical shape, in particular in a hemispherical shape. In particular, the bottom of the door is curved in the shape of a segment of a sphere.

Gemäß einer weiteren Ausführungsform ist der Türboden bezüglich der Muffel konkav gewölbt.According to a further embodiment, the door base is concave with respect to the muffle.

Insbesondere weist die Wölbung des Türbodens von der Muffel weg.In particular, the curvature of the bottom of the door points away from the muffle.

Gemäß einer weiteren Ausführungsform sind der Türboden und die Mikrowellenfalle separate Bauteile.According to a further embodiment, the door base and the microwave trap are separate components.

Insbesondere wird die Mikrowellenfalle aus einem kammförmigen Blechbauteil gebogen. Dadurch, dass der Türboden und die Mikrowellenfalle als separate Bauteile ausgebildet sind, kann die Mikrowellenfalle beim Verbinden mit dem Türboden exakt zu diesem ausgerichtet werden.In particular, the microwave trap is bent from a comb-shaped sheet metal component. Because the door base and the microwave trap are designed as separate components, the microwave trap can be aligned exactly with the door base when it is connected to it.

Gemäß einer weiteren Ausführungsform ist die Mikrowellenfalle mit dem Türboden verschweißt, insbesondere laserverschweißt.According to a further embodiment, the microwave trap is welded, in particular laser-welded, to the bottom of the door.

Insbesondere kann die Mikrowellenfalle in einem Schweißwerkzeug relativ zu dem Türboden positioniert werden, wodurch enge Toleranzanforderungen eingehalten werden können.In particular, the microwave trap can be positioned in a welding tool relative to the bottom of the door, as a result of which close tolerance requirements can be met.

Gemäß einer weiteren Ausführungsform ist die Mikrowellenfalle eine Lambda-Viertel-Falle.According to a further embodiment, the microwave trap is a quarter-wave trap.

Gemäß einer weiteren Ausführungsform ist die Mikrowellenfalle kammförmig.According to a further embodiment, the microwave trap is comb-shaped.

Gemäß einer weiteren Ausführungsform weist die Mikrowellenfalle einen Befestigungsabschnitt zum Befestigen der Mikrowellenfalle an dem Türboden und einen Fallenabschnitt auf, wobei der Fallenabschnitt so geschlitzt ist, dass dieser sich abwechselnde Fallenzähne und Fallenschlitze aufweist.According to a further embodiment, the microwave trap has an attachment section for attaching the microwave trap to the door bottom and a trap section, the trap section being slotted in such a way that it has alternating trap teeth and trap slots.

Gemäß einer weiteren Ausführungsform ist ein Verhältnis einer Fallenzahnbreite der Fallenzähne zu einer Fallenschlitzbreite der Fallenschlitze zwei.According to another embodiment, a ratio of a latch tooth width of the latch teeth to a latch slot width of the latch slots is two.

Die Fallenzähne weisen bevorzugt eine Breite von 3 bis 5 Millimetern, weiter bevorzugt von 3,5 bis 4,5 Millimetern, weiter bevorzugt von 4 Millimetern auf. Die Fallenschlitze weisen bevorzugt eine Breite von 1 bis 3 Millimetern, weiter bevorzugt von 1,5 bis 2, 5 Millimetern, weiter bevorzugt von 2 Millimetern auf. Die sich wiederholende Periode ist vorzugsweise 6 Millimeter breit mit einem Verhältnis der Fallenzahnbreite zur Fallenschlitzbreite von 2.The catch teeth preferably have a width of 3 to 5 millimeters, more preferably 3.5 to 4.5 millimeters, more preferably 4 millimeters. The trap slits preferably have a width of 1 to 3 millimeters, more preferably 1.5 to 2.5 millimeters, more preferably 2 millimeters. The repeating period is preferably 6 millimeters wide with a ratio of latch tooth width to latch slot width of 2.

Weitere mögliche Implementierungen des Haushaltsgargeräts umfassen auch nicht explizit genannte Kombinationen von zuvor oder im Folgenden bezüglich der Ausführungsbeispiele beschriebenen Merkmale oder Ausführungsformen. Dabei wird der Fachmann auch Einzelaspekte als Verbesserungen oder Ergänzungen zu der jeweiligen Grundform des Haushaltsgargeräts hinzufügen.Other possible implementations of the household cooking appliance also include combinations of features or embodiments described above or below with regard to the exemplary embodiments that are not explicitly mentioned. The person skilled in the art will also add individual aspects as improvements or supplements to the respective basic form of the domestic cooking appliance.

Weitere vorteilhafte Ausgestaltungen und Aspekte des Haushaltsgargeräts sind Gegenstand der Unteransprüche sowie der im Folgenden beschriebenen Ausführungsbeispiele des Haushaltsgargeräts. Im Weiteren wird das Haushaltsgargerät anhand von bevorzugten Ausführungsformen unter Bezugnahme auf die beigelegten Figuren näher erläutert.

  • Fig. 1 zeigt eine schematische perspektivische Ansicht einer Ausführungsform eines Haushaltsgargeräts;
  • Fig. 2 zeigt eine schematische Schnittansicht durch einen Muffelflansch des Haushaltsgargeräts gemäß der Fig. 1;
  • Fig. 3 zeigt eine weitere schematische Schnittansicht durch den Muffelflansch gemäß der Fig. 2;
  • Fig. 4 zeigt eine schematische perspektivische Ansicht einer Ausführungsform einer Mikrowellenfalle für das Haushaltsgargerät gemäß der Fig. 1;
  • Fig. 5 zeigt eine weitere schematische perspektivische Ansicht der Mikrowellenfalle gemäß der Fig. 4; und
  • Fig. 6 zeigt eine schematische perspektivische Ansicht eines Türbodens einer Tür für das Haushaltsgargerät gemäß der Fig. 1.
Further advantageous configurations and aspects of the domestic cooking appliance are the subject of the dependent claims and the exemplary embodiments of the domestic cooking appliance described below. The domestic cooking appliance is explained in more detail below on the basis of preferred embodiments with reference to the enclosed figures.
  • 1 shows a schematic perspective view of an embodiment of a domestic cooking appliance;
  • 2 shows a schematic sectional view through a muffle flange of the domestic cooking appliance according to FIG 1 ;
  • 3 shows a further schematic sectional view through the muffle flange according to FIG 2 ;
  • 4 shows a schematic perspective view of an embodiment of a microwave trap for the domestic cooking appliance according to FIG 1 ;
  • figure 5 shows a further schematic perspective view of the microwave trap according to FIG 4 ; and
  • 6 shows a schematic perspective view of a door bottom of a door for the domestic cooking appliance according to FIG 1 .

In den Figuren sind gleiche oder funktionsgleiche Elemente mit denselben Bezugszeichen versehen worden, sofern nichts anderes angegeben ist.Elements that are the same or have the same function have been provided with the same reference symbols in the figures, unless otherwise stated.

Die Fig. 1 zeigt eine schematische perspektivische Ansicht eines Haushaltsgargeräts 1. Das Haushaltsgargerät 1 weist ein Magnetron 2 zum Erzeugen von Mikrowellen auf. Das Haushaltsgargerät 1 kann beispielsweise ein Mikrowellengerät oder ein Backofen mit Mikrowellenfunktion sein. Das Haushaltsgargerät 1 weist ferner einen Garraum 3 auf, der von einer Muffel 4 des Haushaltsgargeräts 1 umschlossen ist. Mit Hilfe einer Tür 5 kann die Muffel 4 verschlossen werden. Die Muffel 4 weist insbesondere eine quaderförmige Geometrie auf. In der Orientierung der Fig. 1 ist vorderseitig ein Muffelflansch 6 der Muffel 4 vorgesehen. Die Tür 5 kann verschwenkbar an dem Muffelflansch 6 angebracht sein. Wie die Fig. 1 zeigt, kann die Tür 5 an einem unteren Ende verschwenkbar an dem Muffelflansch 6 angebracht sein. Alternativ kann die Tür 5 auch seitlich angeschlagen oder an einem herausziehbaren Backwagen befestigt sein. An einem oberen Abschnitt 7 der Tür 5 kann ein Griff 8 angeordnet sein. In der Fig. 1 ist die Tür 5 in einem halb geöffneten Zustand gezeigt.The 1 shows a schematic perspective view of a domestic cooking appliance 1. The domestic cooking appliance 1 has a magnetron 2 for generating microwaves. The household cooking appliance 1 can be, for example, a microwave oven or an oven with a microwave function. The domestic cooking appliance 1 also has a cooking chamber 3 which is surrounded by a muffle 4 of the domestic cooking appliance 1 . With the help of a door 5, the muffle 4 can be closed. The muffle 4 has, in particular, a cuboid geometry. In the orientation of 1 a muffle flange 6 of the muffle 4 is provided on the front side. The door 5 can be pivotally attached to the muffle flange 6 . As the 1 shows, the door 5 can be pivotally attached to the muffle flange 6 at a lower end. Alternatively, the door 5 can also be hinged on the side or attached to a pull-out baking trolley. A handle 8 can be arranged on an upper section 7 of the door 5 . In the 1 the door 5 is shown in a half-open state.

Die Fig. 2 und 3 zeigen jeweils eine schematische Schnittansicht durch den oberen Abschnitt 7 der Tür 5 mit dem Muffelflansch 6. Die Tür 5 ist von einem in den Fig. 2 und 3 gezeigten geschlossenen Zustand in Richtung eines Pfeils 9 in den in der Fig. 1 gezeigten geöffneten Zustand klappbar. Zwischen dem Muffelflansch 6 und einem Türboden 10 der Tür 5 ist eine Mikrowellenfalle 11 angeordnet. Der Türboden 10 kann ein Stahlblech sein.The 2 and 3 each show a schematic sectional view through the upper section 7 of the door 5 with the muffle flange 6. The door 5 is of a 2 and 3 shown closed state in the direction of an arrow 9 in the 1 shown foldable when open. A microwave trap 11 is arranged between the muffle flange 6 and a door bottom 10 of the door 5 . The door bottom 10 can be a sheet steel.

Die Mikrowellenfalle 11 ist dazu eingerichtet, den Austritt von Mikrowellen aus dem Garraum 3 zu verhindern. Die Mikrowellenfalle 11 ist insbesondere eine sogenannte Lambda-Viertel-Falle. Die Tür 5 kann die Mikrowellenfalle 11 umfassen. Die Tür 5 umfasst weiterhin einen Abdeckrahmen 12 zum Abdecken der Mikrowellenfalle 11 und eine zwischen dem Abdeckrahmen 12 und dem Türboden 10 angebrachte Dichteinrichtung 13. Der Abdeckrahmen 12 ist vorzugsweise aus einem Kunststoffmaterial gefertigt. Die Dichteinrichtung 13 ist an dem Abdeckrahmen 12 befestigt. Der Abdeckrahmen 12 ist Bestandteil der Tür 5. Die Dichteinrichtung 13 weist eine Dichtlippe 14 auf, die dazu eingerichtet ist, die Tür 5 gegenüber dem Muffelflansch 6 abzudichten. Die Dichtlippe 14 ist vorzugsweise federelastisch verformbar. Beispielsweise ist die Dichteinrichtung 13 aus einem temperaturfesten Kunststoffmaterial gefertigt.The microwave trap 11 is designed to prevent microwaves from escaping from the cooking chamber 3 . The microwave trap 11 is in particular a so-called quarter-wave trap. The door 5 can enclose the microwave trap 11 . The door 5 further comprises a cover frame 12 for covering the microwave trap 11 and a sealing device 13 fitted between the cover frame 12 and the door bottom 10. The cover frame 12 is preferably made of a plastic material. The sealing device 13 is attached to the cover frame 12 . The cover frame 12 is part of the door 5. The sealing device 13 has a sealing lip 14 which is designed to seal the door 5 from the muffle flange 6. The sealing lip 14 is preferably resiliently deformable. For example, the sealing device 13 is made of a temperature-resistant plastic material.

Der Türboden 10 weist einen Befestigungsabschnitt oder ersten Abschnitt 15 auf, an dem die Mikrowellenfalle 11 befestigt ist. Weiterhin weist der Türboden 10 einen senkrecht zu dem ersten Abschnitt 15 angeordneten zweiten Abschnitt 16 auf. Zwischen dem zweiten Abschnitt 16 und dem Abdeckrahmen 12 ist die Dichteinrichtung 13 angeordnet. Die Mikrowellenfalle 11 weist einen Befestigungsabschnitt 17 auf, der an dem ersten Abschnitt 15 des Türbodens 15 befestigt ist. Vorzugsweise ist der Befestigungsabschnitt 17 mit dem ersten Abschnitt 15 des Türbodens 10 verschweißt, insbesondere laserverschweißt. Die Mikrowellenfalle 11 weist weiterhin einen Fallenabschnitt 18 auf. Der Fallenabschnitt 18 ist dazu eingerichtet, eine Mikrowellenleckrate des Haushaltsgargeräts 1 zu reduzieren. Unter Mikrowellenleckrate ist eine aus dem Haushaltsgargerät 1 austretende Mikrowellenleistung pro Flächeneinheit zu verstehen. Der Fallenabschnitt 18 ist um einen Abstand d von dem zweiten Abschnitt 16 des Türbodens 10 entfernt angeordnet.The door bottom 10 has an attachment portion or first portion 15 to which the microwave trap 11 is attached. Furthermore, the door bottom 10 has a second section 16 arranged perpendicular to the first section 15 . The sealing device 13 is arranged between the second section 16 and the cover frame 12 . The microwave trap 11 has an attachment section 17 which is attached to the first section 15 of the door bottom 15 . The fastening section 17 is preferably welded to the first section 15 of the door base 10, in particular laser-welded. The microwave trap 11 also has a trap section 18 . The trap portion 18 is configured to reduce a microwave leak rate of the home cooking appliance 1 . Microwave leak rate is to be understood as meaning a microwave output per unit area escaping from the domestic cooking appliance 1 . The latch portion 18 is spaced a distance d from the second portion 16 of the door bottom 10 .

Die Fig. 4 und 5 zeigen die Mikrowellenfalle 11 jeweils in einer schematischen perspektivischen Ansicht. Die Mikrowellenfalle 11 ist bis auf den Befestigungsabschnitt 17 geschlitzt. Der Fallenabschnitt 18 ist insbesondere so geschlitzt, dass dieser sich abwechselnde Faltenzähne 19 und Fallenschlitze 20 aufweist. Durch die tiefe Schlitzung der Mikrowellenfalle 11 ist diese beliebig verformbar oder biegbar. Vorzugsweise ist die Mikrowellenfalle 11 kammförmig ausgebildet.The 4 and 5 each show the microwave trap 11 in a schematic perspective view. The microwave trap 11 is slotted except for the attachment section 17 . In particular, the latch section 18 is slotted in such a way that it has alternating folding teeth 19 and latch slots 20 . Due to the deep slits in the microwave trap 11, it can be deformed or bent as desired. The microwave trap 11 is preferably designed in the form of a comb.

Die Fig. 6 zeigt den ersten Abschnitt 15 des Türbodens 10 in einer schematischen perspektivischen Ansicht. In der Orientierung der Fig. 6 ist die Muffel 4 hinter dem Türboden 10 angeordnet. Der Türboden 10 und insbesondere der erste Abschnitt 15 des Türbodens 10 ist sphärisch gewölbt. Der Türboden 10 ist kugelförmig, insbesondere halbkugelförmig, gewölbt. Dadurch, dass die Mikrowellenfalle 11 biegbar ist, ist deren Kontur an den gewölbten Türboden 10 anpassbar. Vorzugsweise ist der Muffelflansch 6 korrespondierend zu dem Türboden 10 gewölbt, so dass zwischen dem Muffelflansch 6 und dem Türboden 10 ein gleichmäßiger Türspalt s (Fig. 2) vorgesehen ist. Vorzugsweise ist der Türboden 10 bezüglich der Muffel 4 konkav gewölbt. Das heißt, der Türboden 10 ist von der Muffel 4 weg gewölbt.The 6 shows the first section 15 of the door bottom 10 in a schematic perspective view. In the orientation of 6 the muffle 4 is arranged behind the door bottom 10 . The door bottom 10 and in particular the first section 15 of the door bottom 10 is spherically curved. The door bottom 10 is spherical, in particular hemispherical, arched. Due to the fact that the microwave trap 11 can be bent, its contour can be adapted to the arched bottom 10 of the door. Preferably, the muffle flange 6 is curved corresponding to the door bottom 10, so that a uniform door gap s ( 2 ) is provided. The door bottom 10 is preferably curved concavely with respect to the muffle 4 . That is, the door bottom 10 is curved away from the muffle 4 .

Der Türboden 10 und die Mikrowellenfalle 11 sind insbesondere separate Bauteile. Beim Verbinden der Mikrowellenfalle 11 mit dem Türboden 10 und insbesondere mit dem ersten Abschnitt 15 des Türbodens 10 werden die Mikrowellenfalle 11 und der Türboden 10 mechanisch und elektrisch verbunden. Beispielsweise können die Mikrowellenfalle 11 und der Türboden 10 verschweißt werden. Hierzu können in einem Werkzeug einer Schweißvorrichtung die noch unverbundenen Bauteile exakt zueinander positioniert werden, so dass insbesondere der Abstand d mit hoher Präzision eingehalten werden kann.The door bottom 10 and the microwave trap 11 are, in particular, separate components. When connecting the microwave trap 11 to the door base 10 and in particular to the first section 15 of the door base 10, the microwave trap 11 and the door base 10 are mechanically and electrically connected. For example, the microwave trap 11 and the door bottom 10 can be welded. For this purpose, the still unconnected components can be positioned exactly to one another in a tool of a welding device, so that in particular the distance d can be maintained with great precision.

Die im Inneren der Muffel 4 herrschende Mikrowellenstrahlung trifft mit unterschiedlichen Einfallswinkeln θ auf die Mikrowellenfalle 11 auf. Bei Schrägeinfall einer Mikrowelle verlängert sich die effektiv wirksame Fallenlänge einer nicht geschlitzten Mikrowellenfalle um den Faktor 1/cos (θ). Dementsprechend variiert mit der effektiven Fallenlänge auch die wirksame Frequenz, so dass eine nicht geschlitzte Mikrowellenfalle bei beliebigen Einfallswinkeln nicht mehr optimal wirkt. Bei Haushaltsgargeräten mit großen Muffelabmessungen ist dieser Effekt besonders stark ausgeprägt, da hier unterschiedliche Einfallswinkel in einem sehr breiten Spektrum auftreten können. Fehlt der Mikrowellenfalle eine Unterteilung durch Schlitze, können Oberflächenströme ungehindert in Wellenausbreitungsrichtung fließen.The microwave radiation prevailing inside the muffle 4 strikes the microwave trap 11 at different angles of incidence θ. In the case of oblique incidence of a microwave, the effectively effective trap length of an unslotted microwave trap increases by a factor of 1/cos (θ). Accordingly, the effective frequency also varies with the effective trap length, so that a microwave trap that is not slotted no longer works optimally at any angle of incidence. This effect is particularly pronounced in household cooking appliances with large muffle dimensions, since different angles of incidence can occur in a very broad spectrum. If the microwave trap is not divided by slots, surface currents can flow unhindered in the direction of wave propagation.

Die Fallenschlitze 20 der zuvor beschriebenen Mikrowellenfalle 11 hingegen verhindern dies und lenken die Oberflächenströme in Schlitzrichtung um, so dass die zugehörigen Mikrowellen einen wesentlich geringeren Einfallswinkel θ aufweisen, der so klein ist, dass die Einfallssituation fast einer in Normalenrichtung einlaufenden Mikrowelle entspricht.The trap slits 20 of the microwave trap 11 described above, on the other hand, prevent this and deflect the surface currents in the direction of the slit, so that the associated Microwaves have a much smaller angle of incidence θ, which is so small that the incident situation almost corresponds to a microwave arriving in the normal direction.

In einer bevorzugten Ausführungsform wird die Mikrowellenfalle 11 aus einem Metallkamm gebogen, dessen Fallenzähne 19 beispielsweise eine Fallenzahnbreite b19 von vier Millimetern und eine Fallenschlitzbreite b20 der Fallenschlitze 20 von beispielsweise zwei Millimetern aufweisen (Fig. 4). Die sich wiederholende Periode ist dann sechs Millimeter breit und weist ein Verhältnis der Fallenzahnbreite b19 zu der Fallenschlitzbreite b20 von zwei auf. In der genannten Ausführungsform verlängert sich bei den zuvor genannten Abmessungen die effektive Länge der Mikrowellenfalle 11 lediglich um 0,9 % bei einer üblichen Betriebsfrequenz des Haushaltsgargeräts 1 mit 2,45 GHz. Hierbei ist eine Viertelwellenlänge 30,5 Millimeter lang, während ein Fallenzahn 19 vier Millimeter breit ist. Der Faktor zur Bestimmung der effektiven Fallenlänge berechnet sich nach folgender Formel: 1/cos(arctan)4/30,5 = 1,00856.In a preferred embodiment, the microwave trap 11 is bent from a metal comb whose trap teeth 19 have, for example, a trap tooth width b19 of four millimeters and a trap slot width b20 of the trap slots 20 of, for example, two millimeters ( 4 ). The repeating period is then six millimeters wide and has a ratio of latch tooth width b19 to latch slot width b20 of two. In the embodiment mentioned, with the aforementioned dimensions, the effective length of the microwave trap 11 is only increased by 0.9% at a normal operating frequency of the household cooking appliance 1 of 2.45 GHz. Here, a quarter-wave length is 30.5 millimeters long, while a 19-tooth ratchet is four millimeters wide. The factor for determining the effective trap length is calculated using the following formula: 1/cos(arctan)4/30.5 = 1.00856.

Umgekehrt entspricht einer solchen Verlängerung der effektiven Fallenlänge eine Verschiebung der wirksamen Fallenfrequenz von 2,45 GHz zu 2,43 GHz. Die Wirkung der Mikrowellenfalle 11 wird durch diese geringe Frequenzverschiebung nicht erheblich beeinflusst. Es sind beliebige Periodenbreiten und Verhältnisse der Fallenzahnbreite b19 zu der Fallenschlitzbreite b20 möglich. Die genaue Festlegung hängt unter anderem von einer Position der Mikrowellenfalle 11 und den Dimensionen des Türbodens 10 ab.Conversely, such an increase in the effective trap length corresponds to a shift in the effective trap frequency from 2.45 GHz to 2.43 GHz. The effect of the microwave trap 11 is not significantly affected by this small frequency shift. Any period widths and ratios of the latch tooth width b19 to the latch slot width b20 are possible. The precise definition depends, among other things, on a position of the microwave trap 11 and the dimensions of the door bottom 10 .

Die sehr tiefreichenden Fallenschlitze 20 in Kombination mit einer hohen Anzahl von Fallenschlitzen 20 pro Längeneinheit machen die Mikrowellenfalle 11 biegsam und ermöglichen es, die Kontur der Mikrowellenfalle 11 einer beliebig gekrümmten Oberfläche des Türbodens 10 anzupassen. Durch die Krümmung der Mikrowellenfalle 11 ergibt sich eine bessere wellenabsperrende Wirkungen in Eckbereichen der Tür 5.The very deep trap slits 20 in combination with a large number of trap slits 20 per unit of length make the microwave trap 11 flexible and enable the contour of the microwave trap 11 to be adapted to any curved surface of the door base 10 . The curvature of the microwave trap 11 results in a better wave blocking effect in corner areas of the door 5.

In einer bevorzugten Ausgestaltung wird dabei der Türboden 10, auf den die Mikrowellenfalle 11 aufgeschweißt wird, konkav geformt, so dass die Wölbung von der Muffel 4 weg zeigt. Die Mikrowellenfalle 11 kann ohne mechanische Verspannung in die gewölbte Kontur des Türbodens 10 eingelegt und mit diesem verbunden werden. Vorteilhafterweise ist auch der gegenüberliegende Muffelflansch 6 des Haushaltsgargeräts 1 dieser Kontur angepasst und entsprechend konvex ausgeformt.In a preferred embodiment, the door bottom 10 onto which the microwave trap 11 is welded is concave in shape, so that the curvature points away from the muffle 4 . The microwave trap 11 can be inserted into the arched contour of the door base 10 and connected to it without mechanical stress. Advantageously, the opposite muffle flange 6 of the household cooking appliance 1 is also adapted to this contour and has a correspondingly convex shape.

Der Vorteil des zuvor beschriebenen Haushaltsgargeräts 1 gegenüber bekannten Haushaltsgargeräten liegt in der besseren Absperrwirkung von über dem Türspalt s austretender elektromagnetischer Strahlung. Die besondere Gestaltung der Mikrowellenfalle 11 mit tiefen Fallenschlitzen 20 ist elektrodynamisch vorteilhaft und ermöglicht eine einfache und verspannungsfreie Montage auf gekrümmten Oberflächen, wobei die gekrümmte Anordnung der Mikrowellenfalle 11 wiederum einen positiven Effekt auf die Wellenabsperrung in Eckbereichen der Tür 5 bewirkt.The advantage of the household cooking appliance 1 described above over known household cooking appliances lies in the better blocking effect of electromagnetic radiation escaping through the door gap s. The special design of the microwave trap 11 with deep trap slots 20 is electrodynamically advantageous and enables simple and stress-free installation on curved surfaces, the curved arrangement of the microwave trap 11 in turn having a positive effect on the wave blocking in corner areas of the door 5.

Bei bekannten Lösungen werden der Türboden und die Mikrowellenfalle üblicherweise aus einem gemeinsamen Blechzuschnitt gefertigt. Die Auftrennung von Mikrowellenfalle 11 und Türboden 10 in zwei separate Bauteile, die getrennt gefertigt und dann zusammengefügt werden, wirkt sich vorteilhaft auf eine einfache Gestaltung der notwendigen Biege- und Presswerkzeuge aus, da aufgrund der Krümmung sonst ein erheblicher Aufwand entstehen würde. Weiter ist die Bauteiltrennung vorteilhaft in der Hinsicht, dass das Formen des Türbodens 10 und das Biegen der Mikrowellenfalle 11 getrennt erfolgt und somit die Toleranzen der jeweiligen Prozesse voneinander getrennt kontrollierbar und beeinflussbar sind. Insbesondere ist beim Zusammenfügen der Bauteile eine weitere Korrekturmöglichkeit durch ein zueinander Ausrichten gegeben. Auf diese Weise kann beispielsweise das in der Fig. 1 mit d bezeichnete Maß mit enger Toleranz eingehalten werden.In known solutions, the bottom of the door and the microwave trap are usually made from a common sheet metal blank. The separation of microwave trap 11 and door base 10 into two separate components, which are manufactured separately and then joined together, has an advantageous effect on a simple design of the necessary bending and pressing tools, since the curvature would otherwise result in considerable effort. The separation of components is also advantageous in that the shaping of the door base 10 and the bending of the microwave trap 11 take place separately, and the tolerances of the respective processes can therefore be controlled and influenced separately from one another. In particular, when assembling the components, there is a further possibility of correction by aligning them with one another. In this way, for example, in the 1 dimension marked d must be maintained with a narrow tolerance.

Die tiefgreifende Schlitzung der Mikrowellenfalle 11 führt auch zu einem robusteren Fügeprozess beim Verbinden von Mikrowellenfalle 11 und Türboden 10, da sich die Mikrowellenfalle 11 an den ersten Abschnitt 15 des Türbodens 10 anschmiegt und Krümmungsschwankungen und Unstetigkeiten des ersten Abschnitts 15 gut ausgleichen kann. Auf diese Weise ist das Risiko einer stellenweisen Spaltbildung zwischen Mikrowellenfalle 11 und dem ersten Abschnitt 15 des Türbodens 10 deutlich reduziert.The deep slitting of the microwave trap 11 also leads to a more robust joining process when connecting the microwave trap 11 and the door base 10, since the microwave trap 11 nestles against the first section 15 of the door base 10 and can easily compensate for fluctuations in curvature and discontinuities in the first section 15. In this way, the risk of a gap forming in places between the microwave trap 11 and the first section 15 of the door base 10 is significantly reduced.

Obwohl die vorliegende Erfindung anhand von Ausführungsbeispielen beschrieben wurde, ist sie vielfältig modifizierbar.Although the present invention has been described using exemplary embodiments, it can be modified in many ways.

Verwendete Bezugszeichen:Reference signs used:

11
Haushaltsgargeräthousehold cooking appliance
22
Magnetronmagnetron
33
Garraumcooking chamber
44
Muffelmuffle
55
Türdoor
66
Muffelflanschmuffle flange
77
AbschnittSection
88th
GriffHandle
99
PfeilArrow
1010
Türbodendoor bottom
1111
Mikrowellenfallemicrowave trap
1212
Abdeckrahmencover frame
1313
Dichteinrichtungsealing device
1414
Dichtlippesealing lip
1515
AbschnittSection
1616
AbschnittSection
1717
Befestigungsabschnittattachment section
1818
Fallenabschnitttrap section
1919
Fallenzahntraptooth
2020
Fallenschlitztrap slot
di.e
AbstandDistance
ss
Türspaltdoor gap
b19b19
Fallenzahnbreitetrap tooth width
b20b20
Fallenschlitzbreitetrap slot width

Claims (8)

  1. Household cooking appliance (1) having a magnetron (2) for generating microwaves, a muffle (4) for receiving food to be cooked, a door (5) for closing the muffle (4) and a microwave trap (11), said microwave trap being arranged between a muffle flange (6) of the muffle (4) and a door base (10) of the door (5), wherein the door base (10) is arched, wherein the microwave trap (11) is flexible in order to adapt its contour to the arched door base (10), wherein the microwave trap (11) is fastened to the arched door base (10), wherein the muffle flange (6) is arched so as to correspond to the door base (10), so that a uniform door gap (s) is provided between the muffle flange (6) and the door base (10), characterised in that the door base (10) is arched in a spherical manner and that the microwave trap (11) is adapted to the arch of the door base (10), as a result of which the trapping effect is improved in corner regions of the door (5).
  2. Household cooking appliance according to claim 1, characterised in that the door base (10) is arched in a concave manner in respect of the muffle (4).
  3. Household cooking appliance according to claim 1 or 2, characterised in that the door base (10) and the microwave trap (11) are separate components.
  4. Household cooking appliance according to one of claims 1 - 3, characterised in that the microwave trap (11) is welded, in particular laser-welded, to the door base (10).
  5. Household cooking appliance according to one of claims 1 - 4, characterised in that the microwave trap (11) is a Lambda quarter-wave trap.
  6. Household cooking appliance according to one of claims 1 - 5, characterised in that the microwave trap (11) is comb-shaped.
  7. Household cooking appliance according to claim 6, characterised in that the microwave trap (11) has a fastening segment (17) for fastening the microwave trap (11) to the door base (10) and a trap segment (18), wherein the trap segment (18) is slotted such that it has alternating trap teeth (19) and trap slots (20).
  8. Household cooking appliance according to claim 7, characterised in that a ratio of a trap tooth width (b19) of the trap teeth (19) to a trap slot width (b20) of the trap slots (20) amounts to two.
EP15791547.1A 2014-11-25 2015-10-30 Cooking household appliance Active EP3225079B1 (en)

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DE102014224053.0A DE102014224053A1 (en) 2014-11-25 2014-11-25 Haushaltsgargerät
PCT/EP2015/075220 WO2016083070A1 (en) 2014-11-25 2015-10-30 Cooking household appliance

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Publication number Priority date Publication date Assignee Title
DE102017210730A1 (en) 2017-06-26 2018-12-27 BSH Hausgeräte GmbH Microwave oven with quarter-wave trap
IT202000017299A1 (en) * 2020-07-16 2022-01-16 Smeg Spa FOOD OVEN
DE102021210592A1 (en) 2021-09-23 2023-03-23 BSH Hausgeräte GmbH Cooking chamber door for a microwave oven and microwave oven

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DE3409563A1 (en) * 1984-03-15 1985-09-19 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Microwave oven

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EP0184069B1 (en) 1984-11-20 1992-04-29 Matsushita Electric Industrial Co., Ltd. Door assembly for microwave heating apparatus
IT1225856B (en) * 1988-12-19 1990-12-07 Zanussi A Spa Industrie MICROWAVE OVEN EQUIPPED WITH A MICROWAVE SHIELDING DEVICE
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EP1401244B1 (en) * 2002-09-23 2011-02-16 LG Electronics, Inc. Constructional features in a microwave oven
DE102004003406A1 (en) * 2004-01-23 2005-08-18 Electrolux Schwanden Ag A method for constructing a door for microwave ovens has an inner frame forming a quarter wavelength pocket around the opening and a smaller gap to the housing
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US20170318630A1 (en) 2017-11-02

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