EP4543143A1 - Porte de four pour un four ménager avec fonction de chauffage par micro-ondes - Google Patents

Porte de four pour un four ménager avec fonction de chauffage par micro-ondes Download PDF

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Publication number
EP4543143A1
EP4543143A1 EP23204920.5A EP23204920A EP4543143A1 EP 4543143 A1 EP4543143 A1 EP 4543143A1 EP 23204920 A EP23204920 A EP 23204920A EP 4543143 A1 EP4543143 A1 EP 4543143A1
Authority
EP
European Patent Office
Prior art keywords
cavity
oven
oven door
groove
cover element
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.)
Pending
Application number
EP23204920.5A
Other languages
German (de)
English (en)
Inventor
Marco Böckler
Klaus Winkelmann
Andreas Stark
Stephan Haag
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.)
Electrolux Appliances AB
Original Assignee
Electrolux Appliances AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Electrolux Appliances AB filed Critical Electrolux Appliances AB
Priority to EP23204920.5A priority Critical patent/EP4543143A1/fr
Priority to PCT/EP2024/077585 priority patent/WO2025082738A1/fr
Publication of EP4543143A1 publication Critical patent/EP4543143A1/fr
Pending legal-status Critical Current

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Classifications

    • 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 invention relates to an oven door for a domestic oven having a microwave heating function for heating comestibles in a cavity, the oven door comprising at least the following components:
  • an oven door structure which is adapted for a microwave oven.
  • That oven door structure comprises an inner door structure with a wave choke of metal that in the closed door state needs to form a defined narrow gap with a metal front cavity frame that surrounds the oven cavity for safely avoiding leakage of microwave radiation during operation.
  • the door cover which consists of a polymer frame that carries the inner door glass that faces the oven cavity, wherein the door cover is attached to the inner side of the oven door and covers all components of the inner door that are attached to the outer door frontal glass pane, such as the microwave door choke and the so-called door columns which are attached to the inner side of the front glass pane and to which the wave choke, the door cover and the door hinges can be attached.
  • ovens have an elastic gasket between the cooking chamber, called cavity, and the oven door.
  • a door gasket can for example be hooked in between the cavity and front cavity frame or can be pressed into the gap of the front cavity frame and the cavity.
  • a gasket has a geometry at the fixing end, formed as a hook, in order to rest on the front cavity frame.
  • the gap between front cavity frame and door on microwave ovens is only 1 mm [one millimeter], so that there is no space to have an explicit gasket profile to include technical features e.g., for enhanced steam tightness.
  • the oven gasket is simply compressed by the closing force applied by the door.
  • a combined microwave plus steam oven i.e., having both a microwave source and a steam generator, which correspondingly comprises a wave choke in the door and an elastic steam seal that is arranged in a dedicated notch formed between the oven cooking chamber and the oven front cavity frame.
  • microwave ovens comprise a simple thin elastic steam gasket which is simply fixed on the inside of the oven door and faces the front cavity frame in the closed position of the door.
  • These ovens often do not have a gap between the oven cavity and the front cavity frame, but the front cavity frame is connected in direct continuation of the oven cavity.
  • the above//described microwave ovens with a gap between the cavity and the front cavity frame are advanced microwave ovens, wherein the walls of the cavity are thermically decoupled from the front cavity frame and hence from the outer housing of the oven for reducing thermal energy losses from the oven cavity to the outer oven housing.
  • the aim is to find a cost-effective solution that provides both good sealing properties against steam and the requirements for shielding against microwave radiation. Furthermore, a type-independent design is desired, which can be used without further ado, regardless of the type of oven, i.e. also without microwave heating function and/or steam cooking function.
  • the present invention is based on the task of at least partially overcoming the disadvantages known from the prior art.
  • the features according to the invention result from the independent claims, for which advantageous embodiments are shown in the dependent claims.
  • the features of the claims can be combined in any technically sensible manner, whereby the explanations from the following description as well as features from the figures, which comprise supplementary embodiments of the invention, can also be used for this purpose.
  • the invention relates to an oven door for a domestic oven having a microwave heating function for heating comestibles in a cavity, wherein
  • the oven door is particularly characterized in that the cover element has at least one groove with which, in that state closing the front opening, the gasketing contact is formed and which is formed recessed from the front side of the cavity assembly.
  • a user side or front side is defined as that side to which the user has intended access (for example, via a door to a domestic oven), where something is designated as being located in front, the rear side being the side opposite the user side that is usually inaccessible (often intended for at least one connection and/or facing a wall).
  • a user side is the top side.
  • the sides or lateral elements are arranged between front and rear and extending along the earth-gravity-field, often referred to as left or right, but thus not arranged below or above between front and rear. It should be noted that often a connection is not or not solely provided at the rear, but also alternatively or additionally at the side, bottom and/or top.
  • the direction between the rear side and the front side is referred to as the insertion axis and the direction transverse to this (upwards, downwards, left and/or right) is referred to as radial.
  • ordinal numbers used in the preceding and following descriptions are for the purpose of clear distinction only and do not reflect any order or ranking of the designated components. An ordinal number greater than one does not imply that another such component must necessarily be present.
  • the domestic oven for which the oven door is configured is functionally designed, for example, as conventionally known.
  • the domestic oven is configured for heating comestibles using microwave radiation, and preferably in addition by radiation.
  • the cavity assembly comprises a (inner) cavity frame in which a cavity is formed.
  • the walls of the cavity frame enclose an inner space (the cavity) on several sides, in which comestibles can be placed.
  • the (inner) cavity frame of the cavity is preferably formed in one piece.
  • the (inner) cavity frame is composed of several structural elements which are, for example, screwed, riveted, welded or soldered on.
  • the (inner) cavity frame is preferably a formed, for example deepdrawn, sheet metal component.
  • the cavity is preferably closed using the cavity frame on five sides of an imaginary cuboid, whereby the shape of the cavity is often somewhat more complex than the shape of a cuboid, for example with beveled edges and corners, indentations and passages.
  • Passages are formed, for example, for structural elements, such as screws, light, ventilation, supply lines and/or an inlet for microwave radiation from a microwave source located outside the cavity.
  • at least one passage is not closed when used in a domestic oven, but is merely suitably covered to prevent excessive leakage of microwave radiation.
  • a front opening is formed to the front side of the cavity, which can be closed using the oven door of the domestic oven.
  • the domestic oven is further configured for steam cooking, accordingly including at least one inlet and outlet for steam from at least one steam source disposed outside the cavity and/or at least one steam source disposed inside the cavity.
  • a domestic oven comprises a water source, for example a tank and/or a water connection for a household water pipe.
  • the cavity element or its interior is visible to the user from the front side through the front opening when the door is fully open.
  • a front cavity frame is attached to the front side of the cavity element.
  • the front side is the side which, in use, faces the groove and can be closed with the door of the domestic oven.
  • the domestic oven is integrated into a kitchen unit, for example, so that the rear side opposite the front side is not accessible, for example, it is aligned with a wall.
  • the lateral sides of the domestic oven are adjacent, for example, to adjacent kitchen elements, for example cabinet elements or other kitchen appliances, or at least one lateral side is exposed.
  • the top side, or rather its surface normals facing away from the cavity of the cavity assembly, faces upward, and the bottom side faces downward, with respect to the earth-gravity-field. It should be noted that the sides are described here in idealized form and, as indicated above, often do not correspond to the shape of the walls of the cavity assembly and are or should be precisely aligned with the earth-gravity-field only in technical terms, for example with the aid of a standard household spirit level.
  • the cavity assembly also partially covers the front side with a wall, i.e. also partially encloses the cavity at the front.
  • the cavity assembly does not comprise a wall that encloses the cavity to the front side.
  • at least one flange is provided, for example, which extends at least in part parallel to the front side, preferably outwardly, i.e. away from the front opening of the cavity.
  • such a flange is formed circumferentially in the plane of the front side.
  • Such a flange is arranged, for example, for connection to an outer cavity frame.
  • the front cavity frame (here also called outer cavity frame) is configured as a door frame to oppose the oven door of the domestic oven.
  • the front cavity frame is permanently, preferably directly, connected to the inner cavity frame of the respective cavity.
  • the front cavity frame then correspondingly comprises a receptacle for a hinge or joint for the oven door and/or a gasket element for sealingly abutting the oven door when the latter is closed.
  • the front cavity frame includes a plurality of openings for venting, for example, to remove heat and/or moisture from the insides of the oven door.
  • the front cavity frame itself is not completely closed by the oven door of the domestic oven, but a channel is provided to the outside, for example to the front side. Nevertheless, an interior space of the cavity assembly is completely closed, i.e., on all six sides, with the help of the oven door (in the sealed state), at least with respect to microwave radiation.
  • microwave radiation in some embodiments is allowed to escape to a permissible small extent also to the front side, i.e., through an oven door or a gap between the oven door and the (inner or outer) cavity frame or or through the gasket element, respectively.
  • the microwave radiation is then reduced to such an extent that it is classified as harmless and can therefore be regarded as technically shielded.
  • the microwave radiation is then also referred to hereafter as blocked.
  • the (inner) cavity frame surrounds the front opening of the cavity assembly. It should further be noted that, in one embodiment, the front cavity frame of the cavity assembly is connected to the inner cavity frame immediately adjacent the front opening. Alternatively, or in a range deviating therefrom, the front cavity frame is connected to the inner cavity frame outside the front opening, i.e. towards the top side, the bottom side or one of the lateral sides, respectively, at a distance from the front opening.
  • a circumferential gap (preferably formed completely circumferentially, i.e. uninterruptedly) is formed between the front cavity frame and the inner cavity frame.
  • a circumferential gap is open, for example, for receiving a gasket element.
  • the circumferential gap is partially closed at least once, preferably several times, for forming a connecting element between the front cavity frame and the inner cavity frame.
  • the front cavity frame is preferably formed in one piece.
  • the front cavity frame has further structural elements which are, for example, screwed, riveted, welded or soldered on and are mounted before, during or after the connection to the inner cavity frame of the cavity assembly.
  • the structural columns of the oven door are connected laterally on the outside, often with an offset inwards (i.e., towards each other), in use perpendicular with the front glass, for example glued and/or screwed.
  • the structural columns also have a joint connection or a receptacle for a respective hinge element (for example, a hinge or, preferably, a multi-stage snap joint).
  • the structural columns are merely plugged on and can be easily separated (for example for cleaning).
  • One or more glass panes are inserted between the two structural columns, which are arranged along the insertion axis between the front glass pane and the innermost glass pane and are therefore referred to as intermediate (glass) panes. These serve to provide thermal insulation and are preferably back-ventilated. It may be noted that the (glass) panes are preferably made from glass material. However, other material may be used to serve as transparent and heat resistant for the use-case of heating comestibles. Notwithstanding the above mention material used the panes are referred to being glass panes.
  • At least one of the intermediate panes is provided with a microwave radiation-reflecting or microwave radiation-absorbing coating and/or doping to protect it from penetrating microwave radiation.
  • a door handle is firmly connected to the front glass pane and/or the structural columns so that the oven door can be opened manually by means of the door handle. It should be noted that the oven door can alternatively also be moved using an electric actuator, for example after actuation at a control interface or after an automatic program sequence.
  • At least one of the structural columns comprises a safety lug which, when the front opening is closed, interacts with a fuse switch in such a way that only then can the microwave source (for example a magnetron) be switched on in such a way that microwave radiation can be introduced into the cavity.
  • a safety lug which, when the front opening is closed, interacts with a fuse switch in such a way that only then can the microwave source (for example a magnetron) be switched on in such a way that microwave radiation can be introduced into the cavity.
  • the microwave shutter is a metallic element, preferably a sheet metal element, which is configured to shield against microwave radiation.
  • a microwave grid is preferably provided, which is preferably held by the microwave shutter or is formed integrally with it. This microwave grid provides an unobstructed view into the cavity.
  • a guard plate and a locking plate are provided outside the visible area.
  • the guard plate and the locking plate are aligned with respect to each other and with respect to the (inner and/or outer) cavity frame in such a way that microwave radiation due to reflections and/or electrical capacitor effects cannot penetrate the gap (or only in a sufficiently small dosage).
  • the locking plate has a radial, i.e. (with respect to the insertion axis) outwardly pointing, overlap with the (inner and/or outer) cavity frame with respect to the front opening.
  • the guard plate recedes forward from the locking plate and a chamber is formed between the guard plate and the locking plate. When the oven door is in its closing state, this chamber is open towards the rear side of the domestic oven so that a trap opening is formed around the front opening.
  • the cover element is created as an aesthetic oven-inside trim surface, whereby the cover element may have further tasks.
  • the cover element is configured to guide air between the glass panes.
  • the cover element is arranged as a fastening element for at least one of the inner glass panes, for the microwave lane trap or parts thereof and/or for further elements.
  • the cover element is mechanically fixed (preferably detachable) to the structural columns of the oven door.
  • the cover element is made in one piece or in several pieces.
  • the cover element is made of a plastic and/or a metal material.
  • the cover element is the element of the oven door that is closest to the cavity and the cavity frame. It is now proposed here that the cover element has a groove with which, in the closed state, the gasketing contact (preferably via a gasket element made of a soft, preferably elastomeric, plastic) to the cavity assembly is formed. In one embodiment, the gasketing contact is provided solely for thermal insulation.
  • This groove offers the advantage that more space is created between the cover element and the cavity assembly at the front opening for a gasketing contact, but at the same time a gap lying radially further out (relative to the insertion axis) can be kept narrow, for example below 2 mm [two millimetres], preferably 1 mm or less. Radially inward to the groove, there is again space for the at least one inner glass pane and for the microwave shutter.
  • a cover element with such a groove is not limited to such an application, but can also be used without restrictions, for example, in a domestic oven without a microwave heating function. Also, in this case, it is not mandatory that one or the only gasket element of the cavity assembly come into gasketing contact with the groove. It should be noted that in the closed state of the groove, preferably (but not necessarily) only the groove base is in gasketing contact with a gasket element.
  • the groove is singleshaped, for example trapezoidal.
  • the groove is for example formed from sheet metal using deep drawing or coining, or can be easily removed from a forming die or forming tool without an undercut.
  • the groove of the cover element has on the rear side an outwardly projecting projection, wherein the projection is formed projecting into the trap opening of the microwave shutter.
  • the cover element at least in the area of the groove, preferably as a whole, is made so thin that the groove protrudes on its side (in the closed state) facing away from the front opening of the domestic oven, i.e. on the rear side of the groove in relation to its gasketing function with the cavity side, for example almost (i.e. only with the addition of the material thickness) with the same dimensions as the groove.
  • This rear side projection of the groove which thus extends forward with respect to the domestic oven, is positioned in the trap opening of the microwave shutter.
  • the groove of the cover element is formed circumferentially around the innermost glass pane.
  • the groove is formed without interruptions, so that a gasket element can also be implemented in the same way without interruptions or without changes in its axial extension.
  • a simple and as short as possible section is formed, which thus extends around the innermost glass pane.
  • a rectangle with only rounded corners is formed.
  • an indentation or bulge is formed for further elements in deviation from a simple rectangle, which is preferably guided jointly by the groove and the gasket element.
  • the groove of the cover element in the closed state is arranged for gasketing contact with a front side gasket element of the cavity assembly of the domestic oven, wherein a steam barrier is formed by the gasket element together with the groove.
  • a gasket element is proposed here, with which a steam barrier can be formed together with the groove.
  • the oven door is thus excellently suited for a domestic oven with a steam cooking function, and preferably at the same time with a microwave heating function.
  • the gasket element can be designed with a comparatively large axial expansion despite a small minimum gap between the cover element and the cavity assembly. This means that a soft material, a gas-filled (closed or open) void and/or a more complex lip structure can be used on the gasket element.
  • the cover element is formed at least in part from a plastic material.
  • the cover element can be produced at particularly low cost.
  • a so-called organic sheet is formed.
  • the cover element is injection molded or injection pressed.
  • several different materials, different plastics and/or different additives in certain areas are bonded, preferably cast, together.
  • the cover element comprises a groove element made of a plastic material in which the groove is formed, wherein preferably a trim element of a metal is further provided by the cover element.
  • the groove is arranged in a region of the cover element, which is formed as a (preferably separate) groove element made of a plastic material.
  • a (preferably separate) groove element made of a plastic material.
  • a trim element is further provided next to the groove element, which is mainly used for aesthetic purposes.
  • the drawing element and/or the groove element also perform a mechanical task, such as fastening and/or securing the inner glass panes and/or the microwave shutter, as well as the other components of the cover element or each other.
  • the groove element and the cover element are connected to each other in such a way that they cannot be detached from each other without causing damage.
  • the cover element comprises a receptacle for one of the glass panes of the oven door, wherein preferably the receptacle is comprised by the groove element according to an embodiment as described above.
  • the innermost glass pane is glued to the cover element.
  • a form-fitting receptacle is formed, preferably with the elasticity of the cover element being so great that the glass pane in question can be inserted into the receptacle with sufficient pure-elastic deformation of the retaining element of the receptacle. The glass pane in question is then fixed and secured in the receptacle without further action.
  • the receptacle for at least one of the glass panes is formed by the (preferably separate) groove element of the cover element.
  • the groove element is designed to be relatively soft for this purpose and is mechanically supported by another area or element of the cover element (for example the trim element) and thus stiffened for the handling by a user.
  • the cover element comprises a, preferably circumferential, pre-sealing lip configured for gasketing contact with the cavity frame of the cavity assembly at the front opening, wherein preferably the pre-sealing lip is comprised by the groove element according to an embodiment as described above.
  • a pre-sealing lip be provided.
  • the pre-sealing lip together with the (e.g., inner) cavity frame forms the usual steam barrier, and a second, downstream seal is formed by the gasket element (in the closed state) in gasketing contact with the groove.
  • the pre-sealing lip is preferably soft, for example made of a silicone or other elastomeric plastic material, and the cover element or the (optional, preferably separate) groove element is preferably made entirely of this plastic material.
  • the cover element comprises a, preferably circumferential, drainage channel for condensate, wherein preferably the drainage channel is comprised by the groove element according to an embodiment as described above.
  • a drainage channel be provided.
  • the water can be directed into a drain, for example in a domestic oven with a steam cooking function for returning to a water supply for the steam source.
  • the aforementioned pre-sealing lip is a cavity-side edge of the drainage channel.
  • the drainage channel is a circumferential groove with its opening radially outward.
  • the cover element or the groove element alone is offset relative to the innermost glass pane in the direction of the cavity (i.e. inwardly of the oven) in such a way that, in the open state, a sufficiently rimmed collecting basin is formed for condensate on the innermost glass, so that the water present in a normal quantity can only flow over from such a sufficient pivoting angle of the oven door when the water is thereby discharged into a drain.
  • the drainage channel is encompassed by the (preferably separate) groove element as mentioned above, and thus a simple component with several functions can be formed, for example, such a groove element comprises the groove for the gasket element of the cavity assembly, the pre-sealing lip as described above and the drainage channel described above, and preferably a receptacle for the innermost glass pane.
  • this groove element is formed from a plastic material, preferably using multi-component molding, with regionally different material elasticity. Alternatively or additionally, a different elasticity is created using suitable material cross-sections.
  • the cover element is plugged onto at least one of the structural columns.
  • the cover element is supported directly over the structural columns, preferably detachably (for example for cleaning), for example clipped.
  • the cover element is screwed and/or glued to the front glass pane, preferably via the structural columns.
  • at least one of the glass panes, especially the innermost glass pane, is connected to the structural columns solely using the cover element.
  • a domestic oven with microwave heating function for heating comestibles comprising at least the following components:
  • the domestic oven proposed herein with microwave heating function, and preferably with steam cooking function, for comestibles housed inside (the cavity of) the cavity assembly comprises a cavity assembly as previously described.
  • the cavity assembly respectively its front opening, is closable by an oven door, namely in an embodiment according to the preceding description, in cooperation with the cavity frames by means of a gasket element.
  • the domestic oven is designed, for example, as already described above with reference to the oven door. In this respect, reference is made to the description there.
  • the microwave source for example a magnetron, is preferably arranged outside the cavity of the cavity assembly and the microwave radiation is guided into the cavity via a corresponding radiation conduit.
  • control electronics configured to control the functions of the domestic oven and at least indirectly controllable via a control interface is also arranged outside the cavity element.
  • the control electronics are integrated into power electronics.
  • the control electronics are separate from the power electronics and preferably spatially separated.
  • the control electronics are common control electronics for other elements, such as a cooking hob.
  • a control interface is provided in this assembly or in the end product, in which the functions of the domestic oven can be operated by the user, for example, using buttons, using a touch display and/or via wireless communication to an external separate control element.
  • the control interface is configured to operate the functions of the domestic oven and is connected to the control electronics for communication.
  • a supply connection for, for example, water for the steam source and/or electricity is provided in this assembly or in the terminal device, whereby the power consumption is preferably controlled using the control electronics.
  • a groove is provided in the oven door, by means of which a good sealing can be created for thermal insulation (when heating comestibles using the air in the cavity) and/or for retaining steam (when cooking with steam), but also for shielding from penetrating microwave radiation.
  • a gasket element with a large axial extension and/or a particularly small minimum gap between the oven door and the cavity frame can be created.
  • the domestic oven comprises a steam source configured to steam cook comestibles located in the cavity of the cavity assembly.
  • the steam source comprises a water source, for example a wall connection and/or a water tank, and an evaporator, and preferably an overflow for discharging liquid water.
  • the steam source is designed without a pump and is controlled solely by the forces of gravity, for example preventing unintentional leakage by using a siphon device with a siphon level at a set filling level and causing intentional (almost) complete leakage (for example for cleansing, dissolving lime deposits) by overfilling the system above the siphon level.
  • a control valve and a defined supply pressure range e.g. using the water tank in a raised position
  • a pump and possibly another control valve are provided.
  • a minimum gap is formed between the cover element of the oven door and the cavity frame at the front side of the cavity assembly, wherein a distance between the oven door and the front side of less than 2 mm, preferably 1 mm or less, is formed by the minimum gap.
  • the distance i.e. the shortest intended connection between two opposing surfaces, is preferably less than 2 mm [two millimetres], preferably 1 mm [one millimetre] or less.
  • the gap has a constant minimum (apart from the groove) in the radial extension from the area of overlap of the guard plate and the cavity frame in question to a bend in the cover element following on the outside. It should be noted that the gap is formed between the cover element and at least one of the cavity frames and its dimensions are defined, for example, radially inside the gasket element with the (inner and/or outer) cavity frame and outside the gasket element with the front cavity frame.
  • the gasket element comprises an enclosed void between the groove and a front side gasket mount of the cavity frame of the cavity assembly.
  • an open or closed void (filled with a gas, for example air) is provided in the gasket element, using which a desired elasticity and snugging of the sealing lips of the gasket element is achieved when the front opening is closed using the oven door.
  • the gasket element is then received in the groove or is plunged into the groove.
  • the gasket element can be designed with a material thickness of more than 0.5 mm [five tenths of a millimetre] around the void and at the same time a minimum gap between the oven door and the cavity frame of less than 2 mm, preferably 1 mm or less, can be set.
  • one or more separate sealing lips of the gasket element can be positioned in the groove of the cover element of the oven door, because they can be pressed against the surface of the groove by using the (preferably enclosed) gas in the void.
  • the front side of the cavity assembly has two cavity frames which are spaced apart from one another with a circumferential gap at the front side
  • the two cavity frames are provided for better thermal insulation, for example an insulating material is provided at least in places between the two cavity frames of the cavity assembly.
  • a gasket element for gasketing contact with the oven door is arranged in a circumferential gap between these two cavity frames.
  • an inner cavity frame is designed as the cavity frame described above, which frames the cavity on five sides.
  • an front cavity frame as described above is then the second (outer) cavity frame.
  • At least one of the two cavity frames is provided with a rearwardly extending flange, wherein the gasket element can be pushed or pressed into the circumferential gap, and by means of a hooked barb at the end it is secured by means of the hooked barb against falling out using the respective flange of the cavity frame.
  • the choke profile is configured to prevent, to a technical degree, the passage of at least such microwave radiation that has been introduced into the cavity assembly. This means that a permissible or uncritical amount of microwave radiation is allowed to pass through. This is not a matter of protecting a user. Rather, the electronics arranged in the domestic oven and outside the cavity element are protected from an excessive intensity or recurrence of microwave radiation.
  • the probability of a radiation angle is also taken into account for an estimation of a recurrence, so that not necessarily every slot has to be blocked, but, for example, a coverage of, for example, at least 70% [seventy percent] to 90% of a passage area to be blocked is sufficient. Alternatively, (at least technically) complete coverage is achieved.
  • the choke profile is set up in such a way that, in use, it overlaps both a cavity side flange and a frame side flange.
  • a choke profile is easy to install and at the same time forms an effective barrier against microwave radiation.
  • the choke profile is formed with a microwave radiation absorbing and/or reflecting material.
  • a material is, for example, a metal or a plastic with itself electrically conductive properties or embedded additives, for example metallic particles or fibres.
  • the choke profile is a cold-formed sheet metal element, whereby, in addition to metallic sheets, so-called prepregs and organo-sheets are also a suitable material.
  • the choke profile is self-retaining, whereby a very low level of frictional adhesion or spot soldering or welding is sufficient for self-retaining due to the purely static load.
  • the choke profile is self-retaining in such a way that it is highly unlikely or certain not to fall off during transport without further securing.
  • no other measure is necessary for (self-retaining) mounting of the choke profile.
  • the choke profile overlaps the two flanges of the two cavity frames in such a way that contact is formed, preferably directly, with both the cavity side flange and the frame side flange.
  • the choke profile is of one-piece and simple design, whereby further separate elements are not provided and are not mounted later.
  • the choke profile is designed as a U-profile, with the two flanges engaging in the U-profile in the assembled state.
  • Fig. 1 a schematic side sectional view of a domestic oven 2 with microwave heating function and (purely optional) steam cooking function is shown.
  • the domestic oven 2 comprises an oven door 1 and a cavity assembly 8.
  • the cavity assembly 8 here comprises a microwave source 30, an (optional) steam source 32, an front (or outer) cavity frame 6, a (inner) cavity frame 5 and a front opening 4.
  • the inner cavity frame 5, the front cavity frame 6 and the oven door 1 enclose a cavity 3.
  • the cavity 3 is adapted for the introduction of comestibles.
  • the microwave source 30 is configured to generate microwave radiation for heating the comestibles located in the cavity 3 of the cavity assembly 8.
  • the front cavity frame 6 is configured as a door frame for the oven door 1 of the domestic oven 2.
  • the front cavity frame 6 is permanently connected to the inner cavity frame 5 of the cavity 3 here.
  • the inner cavity frame 5 of the cavity 3 is formed in one piece and surrounds the front opening 4 of the cavity assembly 8.
  • the domestic oven 2 is further configured for steam cooking, with a steam source 32 disposed within the cavity 3.
  • the oven door 1 comprises a top cover element 48, a microwave shutter 16, an innermost glass pane 14, a front glass pane 11, a front (intermediate) glass pane 12, an inner (intermediate) glass pane 13, and a cover element 20.
  • the oven door 1 is configured for closing the front opening 4 of the inner cavity frame 5 at the front side 7 of the cavity assembly 8 of a domestic oven 2 framing the cavity 3.
  • the oven door 1 is movably mounted using an oven door connection 45 (not shown here, compare Fig. 2 ) for opening and closing the front opening 4.
  • the microwave shutter 16 is formed, for example, as a metallic element (for example, using deep-drawing from a sheet metal element), which is configured to shield the environment of the domestic oven 2 from microwave radiation.
  • the cover element 20 is configured to form a (inside) trim surface and a gasketing contact for closing the front opening 4 of the cavity assembly 8.
  • the cover element 20 has at least one groove 21 (compare Fig. 3 ) with which the gasketing contact is formed in that state closing the front opening 4 and which is formed recessed from the front side 7 of the cavity assembly 8.
  • the microwave shutter 16 is configured in such a way that microwave radiation cannot penetrate the gap 33 due to reflections and/or electrical capacitor effects (or only in a sufficiently small dosage).
  • the (intermediate) glass panes 12,13 are used for thermal isolation, for example using rear ventilation.
  • the innermost glass 14 and/or at least one of the two (intermediate) panes 12,13 is coated and/or doped to reflect or absorb microwave radiation.
  • a domestic oven 2 without oven door 1, for example according to Fig. 1 is shown in a spatial view.
  • the domestic oven 2 comprises a control interface 31, a gasket element 23, an oven door connection 45 and a cavity 3, which is enclosed by a top side 40, a bottom side 41 and two lateral sides 39.
  • the front opening 4 of the cavity 3 is arranged at the front side 7, of the here approximately cube-shaped cavity assembly 8.
  • the control interface 31 is configured for operating the functions of the domestic oven 2 and can be operated, for example, using buttons, a touch display and/or via wireless communication (for example, using a smartphone) and is connected in a communicating manner to control electronics.
  • the control electronics (not shown here) are arranged outside the cavity 3, for example on the top side 40.
  • the oven door connection 45 is enclosed within the front cavity frame 6 and is designed, for example, as a hinge or joint for the oven door 1.
  • a gasket element 23 is arranged around the front opening 4, which insulates the cavity 3 from the outside and is configured, for example, as a steam barrier 24 (in the case of a domestic oven 2 with a steam source 32 ) and/or barrier for microwave radiation.glass pane
  • an oven door 1 is shown in a rear side view. Visible here from the oven door 1 is a (small part of the) door handle 50, a front glass pane 11, a microwave grid 46, a groove 21, a joint connection 15, an innermost glass pane 14, a cover element 20, two safety lugs 49, and a top cover element 48.
  • the top cover element 48 is preferably configured to guide the air between the glass panes 11,12,13,14 of the oven door 1 and is mechanically firmly connected to the cover element 20 and/or the (here concealed) structural columns 9,10 (compare Fig. 8 ).
  • the door handle 50 for example, is firmly connected to the structural columns 9,10 and is configured for manual operation of the oven door 1 and thus for opening or closing the domestic oven 2. It should be noted that the oven door 1 can alternatively also be moved using an electric actuator.
  • the cover element 20 is configured (like a conventionally designed one) to form a sight surface and a gasketing contact for closing the front opening 4 of a corresponding cavity assembly 8 (not shown here, compare Fig. 2 ).
  • the cover element 20 proposed here is mechanically fixedly connected to the front glass pane 11 and the door handle 50 as well as the joint connection 15 (for example formed by the structural columns 9,10 (compare Fig. 8 ) of the oven door 1.
  • the cover element 20 comprises a groove 21, with which a gasketing contact between the cavity assembly 8 and the oven door 1 can be represented in a closed state with the corresponding front opening 4 of a cavity assembly 8 (not shown here, compare Fig. 2 ).
  • the groove 21 shown here is formed circumferentially without interruptions around the innermost glass pane 14, so that a gasket element 23 (not shown here, compare Fig. 5 ) can also be implemented in the same way circumferentially without interruptions or without changes in the axial extension.
  • a simple and as short as possible section is formed, which thus extends around the innermost glass pane 14.
  • the joint connection 15 is arranged for moving the oven door 1 relative to a cavity assembly 8 (compare Fig. 1 ).
  • the safety lugs 49 together with a safety switch (not shown), are configured to enable a microwave source 30 to be turned on or to emit microwave radiation into the cavity 3 when the front opening 4 is closed.
  • the safety lugs 49 thus ensure that a cavity 3 is completely shielded from radiation when a microwave heating function is started.
  • a microwave grid 46 is provided in the viewing area exposed by the innermost glass pane 14, which is preferably enclosed by a microwave shutter 16 (not shown here, compare Fig. 6 ).
  • the microwave grid 46 allows an unobstructed view into the cavity 3 despite efficient shielding against the penetration of microwave radiation.
  • the microwave grid 46 is designed, for example, as expanded metal.
  • Fig. 4 shows a detailed view of a groove 21 of an oven door 1 according to Fig. 3 in a first embodiment.
  • the oven door 1 comprises a groove 21, a cover element 20, an innermost glass pane 14, and a microwave grid 46.
  • the groove 21 is integral with the cover element 20.
  • This groove 21 offers the advantage that more space is created for gasketing contact between the cover element 20 and the cavity assembly 8 at the front opening 4, but at the same time a gap 33 that is located radially further out (with respect to the insertion axis) can be kept narrow.
  • a gasket element 23 of a steam barrier 24 of a domestic oven 2 is shown in a section detail view.
  • the following description refers to Fig. 1 to Fig. 4 , insofar reference is made to the description there without exclusion of generality purely for the sake of clarity.
  • the cavity assembly 8 shown here comprises an front cavity frame 6 which, as shown, has a frame side (or radially outer) flange 43 to the right in the direction of insertion. Furthermore, the cavity assembly 8 comprises a inner cavity frame 5, by which the cavity 3 is enclosed on five sides.
  • the inner cavity frame 5 comprises a cavity side (or radially inner side) flange 42.
  • a circumferential gap 36 is formed by the frame side flange 43 and the cavity side flange 42, which is designed here as a gasket mount 35 for the gasket element 23.
  • the circumferential gap 36 is preferably formed without interruption, i.e. completely circumferentially, so that a gasket element 23 can also be designed completely circumferentially or (at least on the circumferential gap side) with a constant profile.
  • the gasket element 23 is arranged within the gasket mount 35 and includes (purely optionally) a hooked barb 44.
  • the hooked barb 44 is configured to hook behind the end of one of the two (here the cavity side) flanges 42, so that the gasket element 23 is arranged within the gasket mount 35 in an at least loss-proof (preferably fixed) manner.
  • the gasket element 23 shown here further comprises (purely optionally) a void 34, which is enclosed by a (for example soft) material and is filled with a gas (for example air).
  • the void 34 is configured for being compressed using the oven door 1 in a closed state of the domestic oven 2.
  • the gasket element 23 is designed as a particularly efficient steam barrier 24 against leakage of steam from inside the cavity 3.
  • the gasket element 23 shown has five sealing lips.
  • the first sealing lip 51 is configured radially opposite the hooked barb 44 for sealing abutment against the respective other (here frame-side) flange 43 inclined towards the oven door 1.
  • the second sealing lip 52 is configured for sealing contact with the top face of the front cavity frame 6, inclined towards the rear side 38, and is thus a pre-seal for the first sealing lip 51.
  • the third sealing lip 53 is configured for sealing contact with the top face of the inner cavity frame 5, resting flat, and is thus a pre-seal for a seal formed by the hooked barb 44.
  • the second sealing lip 52 and third sealing lip 53 are preferably already pressed sufficiently strongly against the respective cavity frame 5, 6 as a result of the tensile force of the hooked barb 44.
  • the fourth sealing lip 54 and fifth sealing lip 55 are configured for sealing contact with the oven door 1, preferably in its groove 21, and are inclined radially inward and radially outward, respectively. In the closed state of the domestic oven 2, the fourth sealing lip 54 and fifth sealing lip 55 are pushed away from each other as a result of friction and are thus efficiently pressed against the oven door 1.
  • the circumferential gap 36 between the two flanges 42,43 of the cavity frames 5,6 is covered by a choke profile 37.
  • the choke profile 37 is configured for shielding against microwave radiation, namely for protecting (especially electronic) components (radially) outside the cavity 3.
  • the choke profile 37 shown here is particularly preferably designed as a metallic profile with a plurality of spacedapart tongues on the (radial) inner side running completely around or with interruptions (for example for a connection between the front cavity frame 6 and the inner cavity frame 5 ), so that the choke profile 37 can be pushed onto and/or clamped onto the flanges 42, 43 irrespective of the course (straight or curved).
  • Fig. 6 shows a schematic section detail view of a steam barrier 24 of a domestic oven 2 in a first embodiment.
  • the domestic oven 2 comprises a cavity assembly 8 and an oven door 1, of which a steam barrier 24 is formed.
  • the cavity assembly 8 and the (closed) oven door 1 the cavity 3 arranged on the left as shown is (completely) enclosed.
  • the cavity frames 5,6 and the gasket element 23 reference is made to Fig. 5 and the associated description.
  • a convection barrier for example a steam barrier 24, is formed by the gasket element 23 with the groove 21 on the door side.
  • the gasket element 23 is (elastically) deformed by the oven door 1 in such a way that the gap 33 between the cavity assembly 8 and the oven door 1 of the gasket element 23 is closed.
  • the cover element 20 here has a groove 21 for receiving the gasket element 23 or its door-side sealing lips 54, 55, respectively.
  • the cover element 20 is designed here as a thin (preferably coined sheet) element and therefore has a corresponding projection 22 on the rear side of the groove 21.
  • a fixed connection is formed between the cover element 20 and the innermost glass pane 14, here purely optionally using a gluing 47.
  • the microwave shutter 16 is arranged between the cover element 20 and the next (for example according to Fig. 1 the inner intermediate) glass pane 13.
  • the microwave shutter 16 comprises a guard plate 17, a locking plate 18 and a microwave grid 46.
  • the microwave shutter 16 is configured to shield microwave radiation from the cavity 3 so that only a sufficiently small dose of microwave radiation can pervade to an user in front of the domestic oven 2.
  • the microwave grid 46 is arranged in the viewing area released by the innermost plate 14, which in the embodiment shown (purely optionally) is held between the locking plate 18 and the guard plate 17 of the microwave shutter 16 (e.g. welded, soldered and/or pressfit-stemmed) .
  • the guard plate 17 and the locking plate 18 are provided outside the visible area.
  • the guard plate 17 and the locking plate 18 are aligned with each other and with the inner cavity frame 5 of the cavity 3 in such a way that microwave radiation cannot penetrate (or only in a sufficiently small dosage) through the gap 33 due to reflections and/or electrical capacitor effects.
  • the locking plate 18 has a radial, i.e. outwardly pointing, overlap with the inner cavity frame 5 of the cavity 3 with respect to the front opening 4 (with respect to the insertion axis).
  • the locking plate 18 projects back from the guard plate 17 and a chamber is formed between the locking plate 18 and the guard plate 17. This chamber is open (in the closed state) towards the rear side 38 of the domestic oven 2, so that a trap opening 19 is formed around the front opening 4.
  • cover element 20 with the groove 21 can also be used for a domestic oven 2 without the steam cooking function, so that economies of scale can be achieved due to the usability in different domestic ovens 2.
  • Fig. 7 shows a detailed spatial view of a groove 21 of an oven door 1 in a further embodiment.
  • the detail shown is largely identical to the embodiment shown in Fig. 4 , without excluding generality, purely for the sake of clarity, so that reference is made to the description there and only the differences are discussed here.
  • the groove 21 has a somewhat more complex design here. This becomes clear in the sectional view in Fig. 8 .
  • the cover element 20 is made in two parts (irrespective of the other differences, purely optional) and comprises a groove element 25 and a trim element 26.
  • the groove element 25 is made of a plastic material, for example.
  • the groove 21 can be designed individually for specific purposes or for different domestic ovens 2.
  • the trim element 26 is mainly used for aesthetic purposes.
  • the trim element 26 and/or the groove element 25 are also used to perform a mechanical task, for example, to fasten and/or secure the inner glass panes 12, 13, 14 and/or the guard plate 17 of the microwave shutter 16, as well as the respective other components of the cover element 20, or each other, respectively.
  • the groove element 25 and the cover element 20 are connected to each other in such a way that they cannot be detached from each other in a non-destructive manner.
  • Fig. 8 shows a section detail view of a steam barrier 24 of a domestic oven 2 in a further embodiment.
  • the embodiment shown here is largely identical to the embodiment shown in Fig. 5 and Fig. 6 , without excluding generality, purely for the sake of clarity, so that reference is made to the description there and only the differences are discussed here.
  • the cavity 3 is arranged here on the right as shown.
  • the cover element 20 is designed as shown in Fig. 7 , whereby the trim element 26 is not shown here and only the groove element 25 with the groove 21 is shown.
  • the cover element 20 further comprises a pre-sealing lip 28 and a drainage channel 29.
  • the groove 21 causes a projection 22 towards the front side 7 and is arranged in the front opening 4 of the microwave shutter 16 for use without affecting the installation space.
  • Possible (water) condensate deposits on the oven door 1 can be reduced using a pre-sealing lip 28.
  • the pre-sealing lip 28 has a radial extension (in relation to the insertion direction). This radial extension of the pre-sealing lip 28 is in direct contact with the inner cavity frame 5 of the cavity 3.
  • the pre-sealing lip 28 is made, for example, of a plastic material and is formed (here purely optionally in one piece) connected to the cover element 20.
  • the drainage channel 29 is provided here to prevent accumulated condensate from dripping outside the domestic oven 2 as far as possible.
  • the water can be directed into a drain in the bottom region of the inner cavity frame 5 of the cavity 3, for example in the case of a domestic oven 2 with a steam cooking function for returning to a water supply for the steam source 32.
  • the aforementioned pre-sealing lip 28 is a cavity-side edge of the drainage channel 29.
  • the drainage channel 29 and the pre-sealing lip 28 are enclosed by the groove element 25.
  • a receptacle 27 for the innermost glass pane 14 is formed by the cover element 20 or the groove element 25.
  • the groove element 25 is designed to be elastic in such a way that the innermost glass pane 14 can be inserted and held in this receptacle 27 using elastic deformation alone.
  • the innermost glass pane 14 is adhesively fixed in the receptacle 27.
  • the structural columns 9, 10 have (preferably slide-in) receptacles 27 for one or more (intermediate) glass panes 12, 13, of which only the inner (intermediate) glass pane 13 is visible here (according to a design form of the oven door 1 as shown in Fig. 1 ).
  • Fig. 9 shows a schematic section detail view of a Steam barrier 24 in a further embodiment.
  • the embodiment shown here is largely identical to the embodiment shown in Fig. 8 , without excluding generality, purely for the sake of clarity, so that reference is made to the description there and only the differences are discussed here.
  • the cover element 20 is also designed here with a pre-sealing lip 28 and a drainage channel 29 of the same shape (due to a complete circulation).
  • the drainage channel 29 is open at the bottom and thus makes a minor contribution to conducting condensate in this area of the oven door 1.
  • the pre-sealing lip 28 is thus also exposed here at the bottom part in the same way as at the sides and on the top for a desired elasticity.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Ovens (AREA)
EP23204920.5A 2023-10-20 2023-10-20 Porte de four pour un four ménager avec fonction de chauffage par micro-ondes Pending EP4543143A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP23204920.5A EP4543143A1 (fr) 2023-10-20 2023-10-20 Porte de four pour un four ménager avec fonction de chauffage par micro-ondes
PCT/EP2024/077585 WO2025082738A1 (fr) 2023-10-20 2024-10-01 Porte de four pour four domestique à fonction de chauffage par micro-ondes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP23204920.5A EP4543143A1 (fr) 2023-10-20 2023-10-20 Porte de four pour un four ménager avec fonction de chauffage par micro-ondes

Publications (1)

Publication Number Publication Date
EP4543143A1 true EP4543143A1 (fr) 2025-04-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP23204920.5A Pending EP4543143A1 (fr) 2023-10-20 2023-10-20 Porte de four pour un four ménager avec fonction de chauffage par micro-ondes

Country Status (2)

Country Link
EP (1) EP4543143A1 (fr)
WO (1) WO2025082738A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH637794A5 (en) * 1977-11-25 1983-08-15 Raytheon Co Microwave oven
DE19805302A1 (de) * 1998-02-10 1999-08-19 Bosch Siemens Hausgeraete Gargerät mit Backofendichtung
EP2731404A1 (fr) 2012-11-12 2014-05-14 Electrolux Home Products Corporation N.V. Porte de four pour four à micro-ondes ou four multifonction avec fonction de chauffage à micro-ondes
EP2747515A1 (fr) * 2012-12-20 2014-06-25 Miele & Cie. KG Appareil de cuisson
EP2815629A1 (fr) 2013-01-25 2014-12-24 Electrolux Home Products Corporation N.V. Four à microondes ou four multifonction avec fonction de chauffage aux microondes
EP3340739A1 (fr) 2016-12-20 2018-06-27 Electrolux Appliances Aktiebolag Porte de four à micro-ondes

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH637794A5 (en) * 1977-11-25 1983-08-15 Raytheon Co Microwave oven
DE19805302A1 (de) * 1998-02-10 1999-08-19 Bosch Siemens Hausgeraete Gargerät mit Backofendichtung
EP2731404A1 (fr) 2012-11-12 2014-05-14 Electrolux Home Products Corporation N.V. Porte de four pour four à micro-ondes ou four multifonction avec fonction de chauffage à micro-ondes
EP2747515A1 (fr) * 2012-12-20 2014-06-25 Miele & Cie. KG Appareil de cuisson
EP2747515B1 (fr) 2012-12-20 2021-03-03 Miele & Cie. KG Appareil de cuisson
EP2815629A1 (fr) 2013-01-25 2014-12-24 Electrolux Home Products Corporation N.V. Four à microondes ou four multifonction avec fonction de chauffage aux microondes
EP3340739A1 (fr) 2016-12-20 2018-06-27 Electrolux Appliances Aktiebolag Porte de four à micro-ondes

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