EP3643141B1 - Appareil de cuisson à micro-ondes à antenne planaire - Google Patents

Appareil de cuisson à micro-ondes à antenne planaire Download PDF

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Publication number
EP3643141B1
EP3643141B1 EP18729965.6A EP18729965A EP3643141B1 EP 3643141 B1 EP3643141 B1 EP 3643141B1 EP 18729965 A EP18729965 A EP 18729965A EP 3643141 B1 EP3643141 B1 EP 3643141B1
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EP
European Patent Office
Prior art keywords
microwave
cooking appliance
cooking chamber
light
emission body
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EP18729965.6A
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German (de)
English (en)
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EP3643141A1 (fr
Inventor
Markus Kuchler
Kerstin RIGORTH
Sebastian Sterz
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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Publication of EP3643141A1 publication Critical patent/EP3643141A1/fr
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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
    • H05B6/72—Radiators or antennas
    • 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
    • H05B6/6444—Aspects relating to lighting devices in the microwave cavity
    • 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
    • H05B6/70—Feed lines

Definitions

  • the invention relates to a microwave cooking device, having a cooking space delimited by a cooking space wall and a microwave device for introducing microwaves into the cooking space, which has at least one patch antenna, the patch antenna having a flat base body and a flat radiating body which is spaced apart and which can be fed with microwave energy and the base body and the radiating body are electrically isolated from one another.
  • the invention is particularly advantageously applicable to household appliances, in particular stand-alone microwave appliances or ovens with a microwave function.
  • WO 2016/043731 A1 discloses a microwave cooking device having a cooking space which is arranged to receive a load, at least two patch antennas which are coupled to at least one microwave generator, and a control unit.
  • Each of the at least two patch antennas is configured in such a way that it can emit microwaves into a predefined direct heating zone within the cooking chamber near the respective patch antenna.
  • the control unit is configured to select energy levels for each of the at least two patch antennas as if the load were static and as if there was no interference between the at least two patch antennas. This has the disadvantage that the simple patch antennas used have only a small feed bandwidth.
  • U.S. 5,558,800 discloses a microwave power radiator for microwave heating applications. It is disclosed that output matching networks, which are normally contained in a microwave power transistor package, as well as a transistor combination network for heating applications, for example in microwave ovens, are eliminated.
  • the transistor dies of four microwave silicon bipolar transistors are directly connected to points of low impedance of a common patch antenna element, which is also referred to as an applicator, and are arranged in the wall of a cooking chamber instead of a magnetron.
  • Each pair of power transistors are electrically spaced one-half wavelength apart and are disposed across the antenna.
  • the transistors are paired with a phase difference operated from 200 °, so that mutually orthogonal longitudinal modes are excited in the antenna.
  • the transistors are frequency modulated over their prescribed frequency band to eliminate standing waves in the load, ie, in the object or substance that is being heated or cooked.
  • Either one or more patch antennas can be used and operated, for example at two different frequencies that are approved for heating applications, typically 915 MHz and 2450 MHz.
  • the patch antenna used has only a small feed bandwidth.
  • US 2016/066369 A1 combines a feed of microwave radiation via waveguides with a light source.
  • a waveguide opening is separated from a cooking space by a cover, for example borosilicate glass.
  • a lighting device Next to the waveguide, and thus outside the microwave field, there is a lighting device, the light source of which is also brought behind the cover through a passage opening and thus illuminates the cooking space through the glass. In this case, however, care must be taken to place the lighting device outside the waveguide cross-section so as not to expose it to excessive microwave radiation or so that the microwave radiation is not unfavorably diverted.
  • the documents WO 2011/070765 A1 , DE 10 2015 109685 A1 and EP 2477455 A1 disclose further microwave cooking devices with patch antennas.
  • the object is achieved by a microwave cooking device according to claim 1.
  • This microwave cooking device has the advantage that the patch antenna has a particularly simple, robust and cost-effective structure and can also feed microwaves with a comparatively large bandwidth into the cooking space.
  • the microwave cooking device can be a pure microwave device or a microwave combination device, for example a cooking device that is or has an oven with a microwave function.
  • the microwave cooking appliance is in particular a household appliance.
  • the microwave device can have a microwave generator (e.g. a magnetron) and at least one microwave line leading to the at least one patch antenna.
  • a microwave generator e.g. a magnetron
  • the (partial) area of the cooking space wall which forms the base body, is a flat partial area of the cooking space wall.
  • the base body is electrically conductive and has a specified reference potential.
  • the base body can in particular serve as a mass.
  • the microwave radiation is emitted via the radiating body.
  • the radiating body is also electrically conductive.
  • a frequency of the microwaves can include, for example, 915 MHz or 2.45 GHz.
  • a flat body can in particular be understood to mean a body which has a noticeable or non-negligible lateral extent (i.e., height and width) when viewed from above on the cooking chamber wall.
  • the fact that the patch antenna has a planar base body and a planar radiating body which overlaps the base body at a spaced apart means consequently that a cavity is located between the base body and the radiating body.
  • the radiating body is a plate-shaped radiating body.
  • the radiating body can in particular be a planar radiating body.
  • the radiating body can also be referred to as a patch or resonator.
  • the radiating body has a rectangular shape when viewed from above, the corners to avoid excessive fields and the associated arcing can be rounded.
  • any other surface shape is also conceivable, wherein the radiating body can have openings or incisions.
  • the radiating body can therefore generally be a non-perforated or a perforated (for example slotted) body.
  • the cooking chamber wall and the radiator are electrically conductive. They can be made of metal, in particular sheet metal.
  • the cooking space wall and / or the radiating body can be coated.
  • the wall of the cooking space can also be referred to as a muffle.
  • the base body corresponds to a recess in the cooking space wall, the radiating body is inserted into the recess.
  • the base body and the radiating body are electrically insulated from one another by a circumferential gap. In this way, a compact patch antenna that is particularly easy to manufacture is provided.
  • the depression is an embossing or bulge.
  • it can be a material recess or a separately produced and then inserted section of the cooking chamber wall.
  • the gap is in particular a circumferential gap when viewed from above on the depression.
  • the gap can in particular have a practically constant gap width.
  • the gap is an air gap.
  • the gap is closed or sealed by means of an electrically insulating closure material.
  • the use of the closure material has the advantage that the gap is mechanically bridged and the radiating body can thereby be stably positioned and fastened.
  • the cavity between the base body and the radiating body is more advantageously protected from contamination and / or other environmental influences and is also less thermally stressed.
  • the closure material covers the gap and at least a partial surface of the radiating body, possibly also the cooking chamber wall adjoining the gap outside the patch antenna on the cooking chamber side.
  • This can enable a particularly simple application of the sealing material, e.g. inexpensively with a general coating of the oven cavity.
  • the surface of the radiator on the cooking space side can thus be protected and / or used functionally. Particularly easy cleaning is also made possible.
  • a particularly simple adaptation of the optical appearance of the patch antenna to the rest of the cooking space wall is possible.
  • closure material only covers the gap and the surface of the radiating body on the cooking space side in a layered manner.
  • the surface of the radiator on the cooking space side can then be lowered according to the thickness of the sealing material there, so that the patch antenna is again flush with the surrounding wall or the patch antenna is flush with the cooking space wall or the surrounding wall.
  • the closure material is glass or glass ceramic.
  • the sealing material can withstand typical oven temperatures, e.g. up to 300 ° C. When used in a pyrolytic oven with microwave functionality, the sealing material can also withstand typical pyrolysis temperatures of 450 ° C. or more without damage.
  • the volume or the cavity between the base body and the radiating body is filled with electrically insulating, in particular temperature-resistant, sealing material such as glass wool or ceramic foam in order to achieve better thermal insulation or electrical dielectric strength.
  • the gap is closed by means of a translucent, electrically insulating closure material and the microwave device has at least one light source, the light of which can be coupled into the closure material from outside the cooking space.
  • the patch antenna can also be used to illuminate the cooking space. The effect that light is directed is used or can be radiated diffusely into the cooking space if the sealing material is illuminated by at least one light source which can be positioned inside or outside the patch antenna.
  • the at least one light source couples its light laterally into the closure material.
  • the closure material can then act as a light guide and in particular decouple the light again over its entire length or its entire circumference.
  • a large light-emitting surface can be provided for emitting light into the cooking space.
  • the surface of the sealing material on the cooking space side can be structured accordingly, e.g. roughened.
  • the light can be coupled in directly or directly into the sealing material located in the gap, in particular by means of a light source attached to the sealing material.
  • the light is coupled in via an optical waveguide or via a waveguide or an air gap (“indirectly”) into the sealing material located in the gap.
  • At least one light source is arranged in such a way that it emits its light into the cavity between the base body and the radiating body.
  • the transparent sealing compound present in the gap then serves as a transmitted light element or window.
  • the light source can for example be arranged in the area of the base body, e.g. protrude or radiate through an opening in the base body.
  • the recess in the cooking space wall which provides the base body corresponds to a recess in a cooking space lighting. So it is possible that a recess or indentation provided for lighting purposes in the cooking chamber wall also accommodates the radiating body or the patch antenna, and the radiating body also seals this space against environmental influences. In this way it is possible to emit light from the antenna unit to an optically transparent walling of this room and in this way to radiate light into the cooking chamber.
  • the inner surfaces of the patch antenna facing the cavity are designed to be reflective. This increases a coupling-out efficiency for light radiated into the cavity.
  • a surface of the base body adjoining the cavity can be configured to be reflective for this purpose.
  • the inner surface (s) can be designed to be diffusely reflective and / or specular.
  • the microwave device has a microwave feed that is coupled to the radiating body.
  • microwave energy can be fed to the radiating body.
  • the coupling can be an inductive coupling, a shaft coupling and so on.
  • a coupling position of the inner conductor on the radiating body can be selected in such a way that the most advantageous possible radiating characteristic results.
  • the microwave device has a microwave feed that is capacitively coupled to the radiating body.
  • the capacitive coupling of the antenna advantageously achieves a significantly larger bandwidth compared to a conventional patch antenna.
  • the feed can thus take place over a larger frequency range with little loss.
  • the structural design of the capacitive coupling is not restricted in principle.
  • the microwave feed is a coaxial line, for example a coaxial cable.
  • the inner conductor of the coaxial line is coupled to the radiating body in terms of high frequency technology.
  • the outer conductor can be electrically connected to the cooking chamber wall or to another ground potential. It is a further development that the inner conductor is electrically insulated through the base body and passed through the cavity to the radiating body.
  • the inner conductor is electrical from the radiator insulated, for example by an air gap or by an electrically insulating material or a dielectric.
  • an inner conductor of the coaxial line is loosely inserted into a sleeve-like receiving area of the radiating body (i.e. not in contact with the radiating body) and an intermediate space between the inner conductor and the sleeve-like receiving area is filled with a dielectric.
  • the sleeve-like receiving area is attached at least to the surface on the cavity side or the rear or underside of the radiating body. On the back of the radiating body there is therefore a sleeve-shaped geometry which, together with the inner conductor of the coaxial line and the dielectric in between, forms a cylinder capacitor.
  • the cylinder capacitor can be carried out as far as the surface or front side on the cooking space side.
  • the inner conductor can be terminated in the interior of the radiating body by the dielectric, in which case the front side of the radiating body then forms a continuous plane.
  • any other suitable microwave line can also be used, e.g. a waveguide, a microstrip line, etc. However, these possibilities are not claimed.
  • patch antennas are present on the cooking chamber wall, which are aligned rotated relative to one another.
  • the rotation of the patch antennas results in the advantage that a polarization direction of the microwaves is also rotated and a transmission of microwaves between the patch antennas can thereby be reduced. It is an advantageous development for a particularly effective suppression of the microwave transmission between the patch antennas that the patch antennas are rotated by 90 ° with respect to one another.
  • Fig.1 shows, as a sectional illustration in an oblique view, a detail from a cooking space wall 1 of a domestic cooking appliance H in the area of a patch antenna 2.
  • the patch antenna 2 is constructed with mirror symmetry, in particular along the sectional plane.
  • the cooking space wall 1 delimits a cooking space G.
  • the patch antenna 2 has a flat base body 3 in the form of a partial area of the cooking space wall 1 on which a recess 4 is located.
  • the base body 3 consequently corresponds to a region of the cooking space wall 1.
  • the recess 4 is designed here as a recess produced by removing material.
  • a flat bottom 5 of the recess 4 on the cooking space side is covered by a plate-like radiating body ("patch" 6).
  • the patch 6 is inserted into the recess 4 in such a way that its upper side 7 facing the cooking space G is arranged practically flush with the cooking space wall 1.
  • the base body 3 corresponds in particular to an area of the cooking space wall 1 below the flat base 5, possibly also below the side edges of the recess 4.
  • the bottom 5 and the patch 6 are electrically conductive. For this purpose, they can have corresponding metallic areas, for example each have a metal sheet.
  • the metal of bottom 5 and patch 6 can be the same or different. So the bottom 5 and the patch 6 can both have sheet steel or consist of sheet steel. Alternatively can the bottom have sheet steel or consist of sheet steel and the patch 6 have copper sheet or consist of copper sheet.
  • the base 5 and the patch 6 are arranged parallel to one another.
  • the recess 4 and the patch 6 form and delimit a cavity 8.
  • the base 5 and the patch 6 have a rectangular basic shape in plan view, the corners of which can be rounded.
  • the edge of the cooking space wall 1 delimiting the recess 4 and an edge of the patch 6 are separated from one another by a circumferential, rectangular annular gap 9.
  • the annular gap 9 is filled with an electrically insulating closure material 10 in the form of glass or glass ceramic.
  • the base body 3 and the patch 6 are therefore electrically insulated from one another, since the cavity 8 also has an electrically insulating effect.
  • the cavity 8 can be filled with air or glass wool, etc. for this purpose.
  • the patch 6 can be fed with microwave energy.
  • An inner conductor 12 of the coaxial line 11 is guided through a bore 13 in the base body 3 and further through the cavity 8 to a rear side 14 of the patch 6.
  • the inner conductor 12 is electrically insulated from the cooking chamber wall 1, for which purpose an intermediate space between the inner conductor 12 and the base body 3 is filled with a dielectric 15.
  • the dielectric 15 also serves to mechanically fix the inner conductor 12.
  • the inner conductor 12 is furthermore electrically insulated from the patch 6, so that a capacitive coupling for microwaves occurs between these components.
  • the closure material 10 is translucent.
  • the household appliance H has at least one light source, for example an LED 16, the light L of which can be coupled into the sealing material 10 from outside the cooking space G.
  • the LED 16 can radiate its light L directly into the closure material 10, for example into a lateral edge.
  • the shutter material 10 then acts as a light guide and distributes the light L around its periphery. The light L is then emitted into the cooking space G, possibly also partially into the cavity 8.
  • the sealing material 10 thus serves to illuminate the cooking space.
  • At least one light source for example an LED 17, can radiate its light directly into the cavity 8.
  • the LED 17 can be arranged in the area of the bottom 5 of the recess 4.
  • the closure material 10 then serves as a window for light to pass into the cooking space G.
  • the inner surfaces of the patch antenna 2 facing the cavity 8 can be designed to be reflective, e.g. the surface of the recess 4, including the base 5, and / or the rear side 14 of the patch 6.
  • patch antennas 2 are present in the cooking space wall 1, in particular in one side of the cooking space wall 1, these can be aligned rotated relative to one another in plan view.
  • Fig. 2 shows as a sectional illustration in side view as a detail a first variant of a capacitive coupling of the inner conductor 12 and the patch 6 of the patch antenna 2.
  • the patch 6 has a tubular or sleeve-like receiving area 18 protruding into the cavity 8 at the rear.
  • the receiving area 18 is formed here continuously through the patch 6, that is, it opens into the cooking space G.
  • the inner conductor 12 is loosely inserted into the receiving area 18.
  • a tubular space 19 between the inner conductor 12 and the sleeve-like receiving area 18 is filled with a dielectric 20.
  • the sleeve-like receiving area 18, together with the inner conductor 12 of the coaxial line and the interposed dielectric 20, in particular forms a cylinder capacitor.
  • the cylinder capacitor is carried out here as far as the surface 7 of the patch 6 on the cooking space side.
  • the dielectrics 15 and 20 can be the same or different.
  • Fig. 3 shows a sectional view in side view of a second variant of a capacitive coupling of the inner conductor 12 and a patch 21 of a patch antenna 2.
  • the patch 21 is designed similar to the patch 6, but now the sleeve-like receiving area 22 is not, but on the plate-shaped portion of the patch 21 connects.
  • Receiving area 22 is thus closed off towards the front or towards the cooking space G.
  • the front side 7 of the patch 21 facing the cooking space G forms a continuous plane.
  • Fig. 4 shows a frequency response FGE of the patch antenna 2 as a plot of a reflection factor
  • the frequency response FGE is considerably broader than a frequency response FGH of a conventional patch antenna. Both frequency responses FGE and FGH have an extreme point at the known microwave frequency of 2.45 GHz.
  • Fig. 5 shows a section from a cooking chamber wall 23 in the area of a patch antenna 24 as a sectional illustration in an oblique view.
  • the patch antenna 24 has a similar basic structure to the patch antenna 2.
  • a base body 25 the surface of which forms the recess 4 (possibly also only its bottom 5) of the cooking space wall 23, has now not been produced by removing material, but by embossing or the like.
  • the sealing material 10 now also covers the patch 21 and the cooking space wall 23 outside the recess 4 in a layered manner. Overall, a layer of the sealing material 10 that is smooth towards the cooking space G is provided.
  • the patch antenna 24 can also be designed to radiate light into the cooking space (not shown).
  • a number can also include exactly the specified number as well as a customary tolerance range, as long as this is not explicitly excluded.

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

Claims (13)

  1. Appareil de cuisson (H) à micro-ondes présentant
    - un espace de cuisson (G) délimité par une paroi (1 ; 23) d'espace de cuisson, et
    - un dispositif à micro-ondes destiné à introduire des micro-ondes dans l'espace de cuisson (G), lequel dispositif présente une antenne patch (2 ; 24), dans lequel
    - l'antenne patch (2 ; 24) présente un corps de base (3 ; 25) plat et un corps de rayonnement (6 ; 21) plat recouvrant le corps de base (3 ; 25) avec écart, pouvant être alimenté en énergie micro-ondes,
    - le corps de base (3 ; 25) et le corps de rayonnement (6 ; 21) sont électriquement isolés l'un par rapport à l'autre, et
    - le corps de base (3 ; 25) correspond à un approfondissement (4) de la paroi (1) d'espace de cuisson,
    - le corps de rayonnement (6 ; 21) est inséré dans l'approfondissement (4), et
    - l'alimentation micro-ondes est une ligne coaxiale (11),
    caractérisé en ce que
    - le corps de base (3 ; 25) et le corps de rayonnement (6 ; 21) sont électriquement isolés l'un de l'autre par une fente (9) entourant le corps de rayonnement (6 ; 21) latéralement, en ce que
    - la fente (9) est fermée au moyen d'une matière d'obturation (10) électriquement isolante, et en ce qu'
    - un conducteur intérieur (12) de la ligne coaxiale (11) est introduit de manière lâche dans une zone de logement (18 ; 22) en forme de douille du corps de rayonnement (6 ; 21), et en ce qu'un espace intermédiaire (19) entre le conducteur intérieur (12) et la zone de logement (18 ; 22) en forme de douille est rempli avec un diélectrique (20).
  2. Appareil de cuisson (H) à micro-ondes selon la revendication 1, caractérisé en ce que la matière d'obturation (10) recouvre le corps de rayonnement (21) et la fente (9) côté espace de cuisson.
  3. Appareil de cuisson (H) à micro-ondes selon l'une quelconque des revendications précédentes, caractérisé en ce que la matière d'obturation (10) est du verre ou de la vitrocéramique.
  4. Appareil de cuisson (H) à micro-ondes selon l'une quelconque des revendications précédentes, caractérisé en ce que
    - la fente (9) est fermée au moyen d'une matière d'obturation (10) électriquement isolante, perméable à la lumière, et en ce que
    - l'appareil de cuisson (H) à micro-ondes présente au moins une source de lumière (16, 17) dont la lumière (L) peut être injectée dans la matière d'obturation (10) depuis l'extérieur de l'espace de cuisson (G).
  5. Appareil de cuisson (H) à micro-ondes selon la revendication 4, caractérisé en ce que l'approfondissement (4) de la paroi (1 ; 23) d'espace de cuisson correspond à un approfondissement d'un éclairage d'espace de cuisson.
  6. Appareil de cuisson (H) à micro-ondes selon l'une quelconque des revendications 4 à 5, caractérisé en ce que des surfaces intérieures (5, 14) de l'antenne patch (2 ; 24) sont réalisées de manière réfléchissant la lumière.
  7. Appareil de cuisson (H) à micro-ondes selon l'une quelconque des revendications 4 à 6, caractérisé en ce que l'au moins une source de lumière (16, 17) injecte sa lumière latéralement dans la matière d'obturation (10).
  8. Appareil de cuisson (H) à micro-ondes selon l'une quelconque des revendications 4 à 6, caractérisé en ce que l'au moins une source de lumière (16, 17) est disposée de manière à ce qu'elle émette sa lumière dans un espace creux (8) entre le corps de base (3 ; 25) et le corps de rayonnement (6 ; 21).
  9. Appareil de cuisson (H) à micro-ondes selon l'une quelconque des revendications précédentes, caractérisé en ce que le corps de rayonnement (6 ; 21), sur son côté (7) tourné vers l'espace de cuisson (G), est disposé au même niveau que la paroi (1 ; 23) d'espace de cuisson.
  10. Appareil de cuisson (H) à micro-ondes selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif micro-ondes présente une alimentation micro-ondes qui est capacitivement couplée au corps de rayonnement.
  11. Appareil de cuisson (H) à micro-ondes selon l'une quelconque des revendications précédentes, caractérisé en ce que le corps de rayonnement (6 ; 21) est un corps de rayonnement en forme de plaque, notamment plan.
  12. Appareil de cuisson (H) à micro-ondes selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un espace creux entre le corps de base (3 ; 25) et le corps de rayonnement (6 ; 21) est rempli avec une matière d'étanchéité résistante à la température, électriquement isolante.
  13. Appareil de cuisson (H) à micro-ondes selon l'une quelconque des revendications précédentes, caractérisé en ce que sur la paroi (1 ; 23) d'espace de cuisson, notamment sur un côté de la paroi (1 ; 23) d'espace de cuisson, plusieurs antennes patch (2 ; 24) sont présentes, lesquelles sont orientées de manière décalée les unes par rapport aux autres.
EP18729965.6A 2017-06-20 2018-06-08 Appareil de cuisson à micro-ondes à antenne planaire Active EP3643141B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017210275.6A DE102017210275A1 (de) 2017-06-20 2017-06-20 Mikrowellen-Gargerät mit Patchantenne
PCT/EP2018/065161 WO2018234064A1 (fr) 2017-06-20 2018-06-08 Appareil de cuisson à micro-ondes à antenne planaire

Publications (2)

Publication Number Publication Date
EP3643141A1 EP3643141A1 (fr) 2020-04-29
EP3643141B1 true EP3643141B1 (fr) 2021-12-15

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EP18729965.6A Active EP3643141B1 (fr) 2017-06-20 2018-06-08 Appareil de cuisson à micro-ondes à antenne planaire

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US (1) US11533792B2 (fr)
EP (1) EP3643141B1 (fr)
CN (1) CN110741731B (fr)
DE (1) DE102017210275A1 (fr)
WO (1) WO2018234064A1 (fr)

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DE102014112522A1 (de) 2014-09-01 2016-03-03 Miele & Cie. Kg Gargerät
WO2016043731A1 (fr) 2014-09-17 2016-03-24 Whirlpool Corporation Chauffage direct par antennes à plaques
DE102015109685B4 (de) * 2015-06-17 2024-05-23 Topinox Sarl Gargerät mit einer Mikrowellenquelle sowie Antenne für ein Gargerät

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WO2018234064A1 (fr) 2018-12-27
EP3643141A1 (fr) 2020-04-29
CN110741731A (zh) 2020-01-31
US11533792B2 (en) 2022-12-20
US20200015327A1 (en) 2020-01-09
DE102017210275A1 (de) 2018-12-20
CN110741731B (zh) 2022-03-04

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