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EP0346194A1 - Micro-wave oven equipped with a field distributor - Google Patents

Micro-wave oven equipped with a field distributor Download PDF

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Publication number
EP0346194A1
EP0346194A1 EP89401526A EP89401526A EP0346194A1 EP 0346194 A1 EP0346194 A1 EP 0346194A1 EP 89401526 A EP89401526 A EP 89401526A EP 89401526 A EP89401526 A EP 89401526A EP 0346194 A1 EP0346194 A1 EP 0346194A1
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EP
European Patent Office
Prior art keywords
wave
container
opening
microwave oven
waveguide
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Granted
Application number
EP89401526A
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German (de)
French (fr)
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EP0346194B1 (en
Inventor
Michel Boulard
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Individual
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Individual
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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

Definitions

  • the present invention relates to a microwave oven equipped with a wave distributor.
  • the microwave oven generally comprises an enclosure in which a container is disposed, one or more microwave sources arranged above the container and an antenna-shaped wave distributor mounted to rotate between the microwave source and the inside of the container.
  • This type of distributor has the advantage of distributing the waves evenly over the surface of the product contained in the container.
  • the waves only enter the product to be heated over a limited thickness so that in the case of a large container containing a large quantity of products to be heated, part of the product is not reached by the waves.
  • An object of the invention is to provide a microwave oven equipped with a wave distributor making it possible to homogenize the temperature inside the container while minimizing the stirring to which the product is subjected.
  • a microwave oven comprising a enclosure in which a container is placed, at least one microwave source arranged above the container, and a wave distributor arranged to rotate between the microwave source and the interior of the container, in which the distributor waveform comprises at least one tubular waveguide disposed substantially vertically, extending inside the container and comprising at least one wave receiving opening in the vicinity of its upper part and at least one diffusion opening d waves opening into the container, the oven preferably comprising means for immobilizing the container against rotation about a vertical axis.
  • part of the waves which would be stopped in the upper layer of the product contained in the container enters the mass of product through the waveguide tubes and exits through the wave diffusion openings to heat the interior of the mass. of product contained in the container, the rotation of the wave distributor ensuring a homogeneous distribution of the waves thus distributed within the material, even for a slow rotation of the wave distributor.
  • the tubular waveguide comprises at least one lateral diffusion opening; at least one wave deflector is arranged in the vicinity of the lateral diffusion orifice, and preferably a first wave deflector facing a wall of the wave guide opposite to the lateral opening is disposed upstream of the lateral opening in a direction of propagation of the microwaves, and a second wave deflector facing the lateral opening of the waveguide is arranged downstream of the lateral opening in the direction of propagation of the microwaves.
  • the wave distributor includes at least two wave guides having lateral diffusion openings at different levels. So we get a homogenization faster temperature within the material.
  • the wave reception and wave diffusion openings are closed by a material permeable to microwaves.
  • the obstruction of the waveguide by the product contained in the container is avoided while ensuring the desired diffusion of the waves.
  • the microwave oven conventionally comprises an enclosure 1 in which is placed a container 2 above which are arranged two microwave generators 3 separated from the container by a protective screen permeable to waves 4.
  • a wave distributor generally designated at 5, has a drive shaft 6 fixed by a coupling 7 to a rotary drive motor 8.
  • the oven also includes a control device with which control buttons are associated 9.
  • the wave distributor comprises an upper cross member 10 fixed to the drive shaft 6 and a lower cross member 11 connected to the upper cross member 10 by two tubular wave guides 12, 13.
  • the tubular waveguides open into a wave receiving opening on the upper face of the cross member 10.
  • the upper end of the wave guides 12, 13 has a funnel shape 14 and the corresponding wave receiving opening is covered with 'a material permeable to waves, for example a glass plate 15.
  • the waveguide 12 has a lateral diffusion opening 16 and, about half of its height, the waveguide 13 has a lateral diffusion opening 17.
  • Each of the diffusion openings 16, 17 is closed by a material permeable to microwaves, for example a curved glass plate 18.
  • the waveguide 13 Upstream of the lateral diffusion opening in a direction of propagation of the microwaves, the waveguide 13 comprises a first deflector 19 facing the wall of the waveguide opposite the lateral opening and, downstream of the lateral opening in the direction of propagation of the microwaves , the waveguide 13 includes a seco nd wave deflector 20 facing the lateral opening of the waveguide. At their lower end, the waveguides open onto the lower face of the cross member 11 according to a second diffusion opening closed by a glass plate 21.
  • the cross-member 10 On its upper face, the cross-member 10 is equipped with adjustment flaps 22 mounted to slide in slides 23.
  • the adjustment flaps 22 are made of microwave-tight material and are used to adjust the quantity of microwaves that are wishes to penetrate the waveguides.
  • the crosspieces 10 and 11 support at their ends scrapers 24 which come to bear on the internal wall of the container 2 during the rotation of the wave distributor 5.
  • the container When the wave distributor is rotated in thick material, the container may be rotated about a vertical axis. To avoid such rotation, stops 1 are provided in enclosure 1 25 fixed to the side walls of the enclosure and on which the handles 26 of the container come to rest. If the container used does not have handles, it is of course possible to provide other means for immobilizing the container 2 against rotation about a vertical axis.
  • the wave distributor according to the invention is inserted into the container containing the product to be heated, then the container is introduced into the enclosure 1 and the drive shaft 6 of the wave distributor 5 is coupled to the motor 8.
  • the microwave generators 3 are started up, part of the waves directly penetrates the upper layer of the product contained in the container 2 while another part of the waves enters the waveguides 12 and 13 in a proportion which depends on the opening of the adjustment flaps 22.
  • the product to be heated does not reach the level of the lateral diffusion opening 17 of the waveguide 13, provision may be made to close the associated adjustment flap.
  • the wave diffusion openings can also have different orientations so that the beams of scattered waves cover the entire internal volume of the container during the rotation of the wave distributor.
  • microwave oven comprising generators arranged laterally, the microwave sources towards the interior of the container being then constituted by fixed or movable deflectors disposed above it.
  • a tubular waveguide coaxial with the drive axis 6 or completely replacing it and opening into the upper part of the oven opposite a wave generator specially assigned to this waveguide.
  • a conical deflector placed opposite the upper end of the waveguide.
  • Such a waveguide coaxial with the drive shaft 6 can also be associated with tubular sleepers 10 equipped with deflectors distributing the waves in lateral waveguides.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)

Abstract

The microwave oven according to the invention comprises an enclosure (1) in which is arranged a receptacle (2), at least one microwave source (3) arranged above the receptacle, and a field distributor (5) mounted so as to rotate between the microwave source and the inside of the receptacle. The field distributor comprises at least one tubular waveguide (12, 13) arranged substantially vertically and extending inside the receptacle and containing at least one wave-receiving aperture in the vicinity of its upper part, and at least one wave-diffusing aperture (16, 17) opening out inside the receptacle; the oven also comprises means (25) of immobilising the receptacle against rotation about a vertical axis. …<IMAGE>…

Description

La présente invention concerne un four à micro-ondes équipé d'un répartiteur d'ondes.The present invention relates to a microwave oven equipped with a wave distributor.

On sait que pour obtenir un chauffage homogène dans un four à micro-ondes il est généralement nécessaire de prévoir un répartiteur d'ondes. Dans les dispositifs existants, le four à micro-ondes comprend généralement une enceinte dans laquelle est disposé un récipient, une ou plusieurs sources de micro-ondes disposées au-dessus du récipient et un répartiteur d'ondes en forme d'antenne monté pour tourner entre la source de micro-ondes et l'inté­rieur du récipient. Ce type de répartiteur présente l'avan­tage de répartir les ondes de façon régulière à la surface du produit contenu dans le récipient. Toutefois, les ondes ne pénétrent dans le produit à réchauffer que sur une épais­seur limitée de sorte que dans le cas d'un grand récipient contenant une quantité importante de produits à chauffer, une partie du produit n'est pas atteinte par les ondes.It is known that to obtain homogeneous heating in a microwave oven it is generally necessary to provide a wave distributor. In existing devices, the microwave oven generally comprises an enclosure in which a container is disposed, one or more microwave sources arranged above the container and an antenna-shaped wave distributor mounted to rotate between the microwave source and the inside of the container. This type of distributor has the advantage of distributing the waves evenly over the surface of the product contained in the container. However, the waves only enter the product to be heated over a limited thickness so that in the case of a large container containing a large quantity of products to be heated, part of the product is not reached by the waves.

Le déposant a déjà apporté une solution à ce problème en prévoyant, comme décrit dans le brevet français 2.588.063, un four à micro-ondes comportant des moyens pour brasser le produit contenu dans le récipient et amener ainsi l'ensemble du produit à être soumis aux micro-ondes afin d'obtenir une température homogène de ce produit à l' intérieur du récipient. Toutefois, l'homogé­néisation ne peut être obtenue que dans la mesure où le produit est brassé de façon suffisante pour l'amener réguliè­rement dans une zone soumise aux micro-ondes. Dans certains cas, un tel brassage peut s'avérer délicat, par exemple lorsque le produit que l'on souhaite chauffer est fragile et doit être brassé aussi faiblement que possible.The applicant has already provided a solution to this problem by providing, as described in French patent 2,588,063, a microwave oven comprising means for brewing the product contained in the container and thus bringing the entire product to be subjected to microwaves in order to obtain a homogeneous temperature of this product inside the container. However, homogenization can only be obtained to the extent that the product is sufficiently stirred to bring it regularly to an area subjected to microwaves. In certain cases, such stirring can prove to be delicate, for example when the product which one wishes to heat is fragile and must be stirred as lightly as possible.

Un but de l'invention est de proposer un four à micro-ondes équipé d'un répartiteur d'ondes permettant d'homogénéiser la température à l'intérieur du récipient en minimisant le brassage auquel le produit est soumis.An object of the invention is to provide a microwave oven equipped with a wave distributor making it possible to homogenize the temperature inside the container while minimizing the stirring to which the product is subjected.

En vue de la réalisation de ce but, on propose selon l'invention un four à micro-ondes comprenant une enceinte dans laquelle est disposé un récipient, au moins une source de micro-ondes disposée au-dessus du récipient, et un répartiteur d'ondes monté pour tourner entre la source de micro-ondes et l'intérieur du récipient, dans lequel le répar­titeur d'ondes comprend au moins un guide d'ondes tubulaire disposé sensiblement verticalement, s'étendant à l'intérieur du récipient et comportant au moins une ouverture de récep­tion d'ondes au voisinage de sa partie supérieure et au moins une ouverture de diffusion d'ondes débouchant à l'intérieur du récipient, le four comprenant de préférence des moyens d'immobilisation du récipient à l'encontre d'une rotation autour d'un axe vertical.In order to achieve this goal, there is provided according to the invention a microwave oven comprising a enclosure in which a container is placed, at least one microwave source arranged above the container, and a wave distributor arranged to rotate between the microwave source and the interior of the container, in which the distributor waveform comprises at least one tubular waveguide disposed substantially vertically, extending inside the container and comprising at least one wave receiving opening in the vicinity of its upper part and at least one diffusion opening d waves opening into the container, the oven preferably comprising means for immobilizing the container against rotation about a vertical axis.

Ainsi, une partie des ondes qui seraient arrêtées dans la couche supérieure du produit contenu dans le récipient pénétre dans la masse de produit par les tubes guide d'ondes et ressort par les ouvertures de diffusion d'ondes pour réchauffer l'intérieur de la masse de produit contenue dans le récipient, la rotation du répartiteur d'ondes assurant une répartition homogène des ondes ainsi distribuées au sein de la matière, même pour une rotation lente du répartiteur d'ondes.Thus, part of the waves which would be stopped in the upper layer of the product contained in the container enters the mass of product through the waveguide tubes and exits through the wave diffusion openings to heat the interior of the mass. of product contained in the container, the rotation of the wave distributor ensuring a homogeneous distribution of the waves thus distributed within the material, even for a slow rotation of the wave distributor.

Selon un des aspects avantageux de l'invention, le guide d'ondes tubulaire comprend au moins une ouverture de diffusion latérale ; au moins un déflecteur d'ondes est disposé au voisinage de l'orifice de diffusion latérale, et de préférence un premier déflecteur d'ondes tourné vers une paroi du guide d'ondes opposée à l'ouverture latérale est disposé en amont de l'ouverture latérale selon un sens de propagation des micro-ondes, et un second déflecteur d'ondes tourné vers l'ouverture latérale du guide d'ondes est disposé en aval de l'ouverture latérale selon le sens de propagation des micro-ondes.According to one advantageous aspect of the invention, the tubular waveguide comprises at least one lateral diffusion opening; at least one wave deflector is arranged in the vicinity of the lateral diffusion orifice, and preferably a first wave deflector facing a wall of the wave guide opposite to the lateral opening is disposed upstream of the lateral opening in a direction of propagation of the microwaves, and a second wave deflector facing the lateral opening of the waveguide is arranged downstream of the lateral opening in the direction of propagation of the microwaves.

Selon d'autres aspects avantageux de l'inven­tion, le répartiteur d'ondes comporte au moins deux guides d'ondes ayant des ouvertures de diffusion latérale à des niveaux différents. Ainsi on obtient une homogénéisation plus rapide de la température au sein de la matière.According to other advantageous aspects of the invention, the wave distributor includes at least two wave guides having lateral diffusion openings at different levels. So we get a homogenization faster temperature within the material.

Selon encore un aspect avantageux de l'inven­tion, les ouvertures de réception d'ondes et de diffusion d'ondes sont fermées par un matériau perméable aux micro-­ondes. Ainsi, on évite l'obstruction du guide d'ondes par le produit contenu dans le récipient tout en assurant la diffusion souhaitée des ondes.According to yet another advantageous aspect of the invention, the wave reception and wave diffusion openings are closed by a material permeable to microwaves. Thus, the obstruction of the waveguide by the product contained in the container is avoided while ensuring the desired diffusion of the waves.

D'autres caractéristiques et avantages de l'invention apparaîtront encore à la lecture de la descrip­tion qui suit d'un mode de réalisation particulier non limitatif de l'invention en liaison avec les dessins ci-­joints parmi lesquels :

  • - la figure 1 est une représentation schéma­tique du four selon l'invention ;
  • - la figure 2 est une vue en perspective partiellement écorchée du répartiteur d'ondes selon l'in­vention ;
  • - la figure 3 est une vue en coupe axiale partielle agrandie d'un guide d'ondes selon la flèche III de la figure 2.
Other characteristics and advantages of the invention will appear further on reading the following description of a particular non-limiting embodiment of the invention in conjunction with the attached drawings, among which:
  • - Figure 1 is a schematic representation of the oven according to the invention;
  • - Figure 2 is a partially cutaway perspective view of the wave distributor according to the invention;
  • FIG. 3 is an enlarged partial axial section view of a waveguide according to arrow III in FIG. 2.

En référence aux dessins, le four à micro-­ondes comprend d'une façon classique une enceinte 1 dans laquelle est disposé un récipient 2 au-dessus duquel sont disposés deux générateurs de micro-ondes 3 séparés du réci­pient par un écran protecteur perméable aux ondes 4. Un répartiteur d'ondes, généralement désigné en 5, a un arbre d'entraînement 6 fixé par un accouplement 7 à un moteur d'entraînement en rotation 8. Le four comporte également un dispositif de commande auquel sont associés des boutons de commande 9.With reference to the drawings, the microwave oven conventionally comprises an enclosure 1 in which is placed a container 2 above which are arranged two microwave generators 3 separated from the container by a protective screen permeable to waves 4. A wave distributor, generally designated at 5, has a drive shaft 6 fixed by a coupling 7 to a rotary drive motor 8. The oven also includes a control device with which control buttons are associated 9.

Selon l' invention, le répartiteur d'ondes comprend une traverse supérieure 10 fixée à l'arbre d'entraî­nement 6 et une traverse inférieure 11 reliée à la traverse supérieure 10 par deux guides d'ondes tubulaires 12, 13. A leur extrémité supérieure, les guides d'ondes tubulaires débouchent selon une ouverture de réception d'ondes sur la face supérieure de la traverse 10. L'extrémité supérieure des guides d'ondes 12, 13 a une forme d'entonnoir 14 et l'ouverture de réception d'ondes correspondante est recou­verte d'un matériau perméable aux ondes, par exemple une plaque de verre 15. Au voisinage de son extrémité inférieure, le guide d'ondes 12 comporte une ouverture de diffusion latérale 16 et, environ à la moitié de sa hauteur, le guide d'ondes 13 comporte une ouverture de diffusion latérale 17. Chacune des ouvertures de diffusion 16, 17 est fermée par un matériau perméable aux micro-ondes, par exemple une plaque de verre incurvée 18. En amont de l'ouverture de diffusion latérale selon un sens de propagation des micro-ondes, le guide d'ondes 13 comporte un premier déflec­teur 19 tourné vers la paroi du guide d'ondes opposée à l'ouverture latérale et, en aval de l'ouverture latérale selon le sens de propagation des micro-ondes, le guide d'ondes 13 comporte un second déflecteur d'ondes 20 tourné vers l'ouverture latérale du guide d'ondes. A leur extrémité inférieure, les guides d'ondes débouchent sur la face infé­rieure de la traverse 11 selon une seconde ouverture de diffusion fermée par une plaque de verre 21.According to the invention, the wave distributor comprises an upper cross member 10 fixed to the drive shaft 6 and a lower cross member 11 connected to the upper cross member 10 by two tubular wave guides 12, 13. At their upper end , the tubular waveguides open into a wave receiving opening on the upper face of the cross member 10. The upper end of the wave guides 12, 13 has a funnel shape 14 and the corresponding wave receiving opening is covered with 'a material permeable to waves, for example a glass plate 15. In the vicinity of its lower end, the waveguide 12 has a lateral diffusion opening 16 and, about half of its height, the waveguide 13 has a lateral diffusion opening 17. Each of the diffusion openings 16, 17 is closed by a material permeable to microwaves, for example a curved glass plate 18. Upstream of the lateral diffusion opening in a direction of propagation of the microwaves, the waveguide 13 comprises a first deflector 19 facing the wall of the waveguide opposite the lateral opening and, downstream of the lateral opening in the direction of propagation of the microwaves , the waveguide 13 includes a seco nd wave deflector 20 facing the lateral opening of the waveguide. At their lower end, the waveguides open onto the lower face of the cross member 11 according to a second diffusion opening closed by a glass plate 21.

Sur sa face supérieure, la traverse 10 est équipée de volets de réglage 22 montés pour coulisser dans des glissières 23. Les volets de réglage 22 sont en matériau étanche aux micro-ondes et servent à régler la quantité de micro-ondes que l'on souhaite faire pénétrer dans les guides d'ondes.On its upper face, the cross-member 10 is equipped with adjustment flaps 22 mounted to slide in slides 23. The adjustment flaps 22 are made of microwave-tight material and are used to adjust the quantity of microwaves that are wishes to penetrate the waveguides.

Selon le mode de réalisation préféré illustré, les traverses 10 et 11 supportent à leur extrémité des racleurs 24 qui viennent en appui sur la paroi interne du récipient 2 lors de la rotation du répartiteur d'ondes 5.According to the preferred embodiment illustrated, the crosspieces 10 and 11 support at their ends scrapers 24 which come to bear on the internal wall of the container 2 during the rotation of the wave distributor 5.

Lors de la rotation du répartiteur d'ondes dans une matière épaisse, le récipient risquerait d'être entraîné en rotation autour d'un axe vertical. Pour éviter une telle rotation, on prévoit dans l'enceinte 1 des butées 25 fixées aux parois latérales de l'enceinte et sur les­quelles viennent s'appuyer les poignées 26 du récipient. Si le récipient utilisé ne comporte pas de poignées, on peut bien entendu prévoir d'autres moyens pour immobiliser le récipient 2 à l'encontre d'une rotation autour d'un axe vertical.When the wave distributor is rotated in thick material, the container may be rotated about a vertical axis. To avoid such rotation, stops 1 are provided in enclosure 1 25 fixed to the side walls of the enclosure and on which the handles 26 of the container come to rest. If the container used does not have handles, it is of course possible to provide other means for immobilizing the container 2 against rotation about a vertical axis.

Pour son utilisation, le répartiteur d'ondes selon l'invention est inséré dans le récipient contenant le produit à chauffer puis le récipient est introduit dans l'enceinte 1 et l'arbre d'entraînement 6 du répartiteur d'ondes 5 est accouplé au moteur 8. Lors de la mise en route des générateurs de micro-ondes 3, une partie des ondes pénétre directement la couche supérieure du produit contenu dans le récipient 2 tandis qu'une autre partie des ondes pénétre dans les guides d'ondes 12 et 13 selon une proportion qui dépend de l'ouverture des volets de réglage 22. En particulier, si le produit à chauffer n'atteint pas le niveau de l'ouverture de diffusion latérale 17 du guide d'ondes 13, on pourra prévoir de fermer totalement le volet de réglage associé.For its use, the wave distributor according to the invention is inserted into the container containing the product to be heated, then the container is introduced into the enclosure 1 and the drive shaft 6 of the wave distributor 5 is coupled to the motor 8. When the microwave generators 3 are started up, part of the waves directly penetrates the upper layer of the product contained in the container 2 while another part of the waves enters the waveguides 12 and 13 in a proportion which depends on the opening of the adjustment flaps 22. In particular, if the product to be heated does not reach the level of the lateral diffusion opening 17 of the waveguide 13, provision may be made to close the associated adjustment flap.

Bien entendu l'invention n'est pas limitée au mode de réalisation décrit et on peut y apporter des variantes de réalisation sans sortir du cadre de l'invention. En particulier, si l'on souhaite augmenter l'effet de bras­sage au sein du produit à chauffer, on pourra multiplier les guides d'ondes. A ce propos on remarquera également que la présente invention est complémentaire de l'invention décrite dans le brevet français 2.588.063 à laquelle elle peut s'appliquer.Of course, the invention is not limited to the embodiment described and it is possible to make variant embodiments without departing from the scope of the invention. In particular, if one wishes to increase the stirring effect within the product to be heated, one can multiply the waveguides. In this regard, it will also be noted that the present invention is complementary to the invention described in French patent 2,588,063 to which it can be applied.

Par ailleurs, on peut prévoir d'équiper le four à micro-ondes selon l'invention avec d'autres accessoires en particulier avec une sonde de température disposée à la surface de l'axe d'entraînement 6 ou à l'intérieur de celui-­ci et reliée à un dispositif de mesure par l'intermédiaire d'une bague collectrice disposée à l'extrémité supérieure de l'axe d'entraînement 6.Furthermore, provision can be made to equip the microwave oven according to the invention with other accessories, in particular with a temperature probe arranged on the surface of the drive shaft 6 or inside that. -this and connected to a measuring device by means of a slip ring disposed at the upper end of the drive axis 6.

Lorsque le four à micro-ondes doit être utilisé pour effectuer une stérilisation ou pour la cuisson de morceaux de produits solides, on peut accrocher à différents niveaux du répartiteur d'ondes selon l'invention des alvéoles ou des petites cages destinées à retenir les morceaux de produits lors de la rotation du répartiteur d'ondes.When the microwave oven is to be used for sterilization or for cooking pieces of solid products, cells or small cages intended to hold the pieces can be hung on different levels of the wave distributor according to the invention. of products when the wave distributor is rotated.

Dans le cas d'un arbre d'entraînement tubulaire, on peut également prévoir une ouverture de réception d'ondes latérales au voisinage de la partie supérieure de l'axe d'entraînement et une ou plusieurs ouvertures de diffusion d'ondes latérales à l'intérieur du récipient 2. Bien entendu les ouvertures de diffusion d'ondes peuvent également avoir différentes orientations afin que les faisceaux d'ondes diffusées couvrent la totalité du volume interne du récipient lors de la rotation du répartiteur d'ondes.In the case of a tubular drive shaft, it is also possible to provide an opening for receiving lateral waves in the vicinity of the upper part of the drive axis and one or more openings for diffusing lateral waves at the inside the container 2. Of course the wave diffusion openings can also have different orientations so that the beams of scattered waves cover the entire internal volume of the container during the rotation of the wave distributor.

Bien que dans le four décrit on ait prévu de disposer les générateurs de micro-ondes au-dessus du récipient, on peut également utiliser un four à micro-ondes comportant des générateurs disposés latéralement, les sources de micro-ondes vers l'intérieur du récipient étant alors constituées par des déflecteurs fixes ou mobiles disposés au-dessus de celui-ci.Although in the oven described provision has been made for placing the microwave generators above the container, it is also possible to use a microwave oven comprising generators arranged laterally, the microwave sources towards the interior of the container being then constituted by fixed or movable deflectors disposed above it.

On peut encore prévoir un guide d'ondes tubu­laire coaxial avec l'axe d'entraînement 6 ou remplaçant totalement celui-ci et débouchant dans la partie supérieure du four en regard d'un générateur d'ondes spécialement affecté à ce guide d'ondes, si nécessaire avec un déflecteur conique disposé en regard de l'extrémité supérieure du guide d'ondes. Un tel guide d'ondes coaxial à l'arbre d'en­traînement 6 peut également être associé à des traverses 10 tubulaires équipées de déflecteurs répartissant les ondes dans des guides d'ondes latéraux.It is also possible to provide a tubular waveguide coaxial with the drive axis 6 or completely replacing it and opening into the upper part of the oven opposite a wave generator specially assigned to this waveguide. , if necessary with a conical deflector placed opposite the upper end of the waveguide. Such a waveguide coaxial with the drive shaft 6 can also be associated with tubular sleepers 10 equipped with deflectors distributing the waves in lateral waveguides.

Claims (10)

1. Four à micro-ondes comprenant une enceinte (1) dans laquelle est disposé un récipient (2), au moins une source de micro-ondes (3) disposée au-dessus du récipient, et un répartiteur d'ondes (5) monté pour tourner entre la source de micro-ondes et l'intérieur du récipient, caractérisé en ce que le répartiteur d'ondes comprend au moins un guide d'ondes tubulaire (12,13), disposé sensiblement verticalement, s'é­tendant à l'intérieur du récipient et comportant au moins une ouverture de réception d'ondes au voisinage de sa partie supérieure et au moins une ouverture de diffusion d'ondes (16,17) débouchant à l'intérieur du récipient.1. Microwave oven comprising an enclosure (1) in which a container (2) is arranged, at least one microwave source (3) disposed above the container, and a wave distributor (5) mounted to rotate between the microwave source and the interior of the container, characterized in that the wave distributor comprises at least one tubular wave guide (12,13), arranged substantially vertically, extending to the interior of the container and comprising at least one opening for receiving waves in the vicinity of its upper part and at least one opening for diffusing waves (16, 17) opening into the interior of the container. 2. Four à micro-ondes selon la revendication 1, caractérisé en ce que le guide d'ondes tubulaire comprend au moins une ouverture de diffusion latérale (16, 17).2. Microwave oven according to claim 1, characterized in that the tubular waveguide comprises at least one lateral diffusion opening (16, 17). 3. Four à micro-ondes selon la revendication 2, caractérisé en ce que le guide d'ondes comprend au moins un déflecteur d'ondes (19,20) disposé au voisinage de l'ou­verture de diffusion latérale.3. Microwave oven according to claim 2, characterized in that the waveguide comprises at least one wave deflector (19,20) disposed in the vicinity of the lateral diffusion opening. 4. Four à micro-ondes selon la revendication 3, caractérisé en ce que le guide d'ondes comprend un premier déflecteur d'ondes (19) tourné vers une paroi du guide d'ondes opposée à l'ouverture latérale et disposé en amont de l'ouverture latérale selon un sens de propagation des micro-­ondes, et un second déflecteur d'ondes (20) tourné vers l'ouverture latérale du guide d'ondes et disposé en aval de l'ouverture latérale selon le sens de propagation des micro-­ondes.4. Microwave oven according to claim 3, characterized in that the waveguide comprises a first wave deflector (19) facing a wall of the waveguide opposite to the lateral opening and arranged upstream of the lateral opening in a direction of propagation of the microwaves, and a second wave deflector (20) turned towards the lateral opening of the waveguide and disposed downstream of the lateral opening in the direction of propagation microwaves. 5. Four à micro-ondes selon l'une des revendi­cations 1 à 4, caractérisé en ce que l'ouverture de réception d'ondes est disposée à l'extrémité supérieure du guide d'ondes (12, 13).5. Microwave oven according to one of claims 1 to 4, characterized in that the wave receiving opening is arranged at the upper end of the waveguide (12, 13). 6. Four à micro-ondes selon la revendication 5, caractérisé en ce que l'extrémité supérieure du guide d'ondes a une forme d'entonnoir (14).6. Microwave oven according to claim 5, characterized in that the upper end of the waveguide has a funnel shape (14). 7. Four à micro-ondes selon l'une des reven­dications 1 à 6, caractérisé en ce que le répartiteur d'ondes comporte au moins deux guides d'ondes (12,13) ayant des ouvertures de diffusion latérales (16,17) à des niveaux différents.7. Microwave oven according to one of claims 1 to 6, characterized in that the wave distributor has at least two wave guides (12,13) having lateral diffusion openings (16,17) at different levels. 8. Four à micro-ondes selon l'une des revendi­cations 1 à 7, caractérisé en ce que les ouvertures de réception d'ondes et de diffusion d'ondes sont fermées par un matériau (15,18) perméable au micro-ondes.8. Microwave oven according to one of claims 1 to 7, characterized in that the openings for receiving waves and diffusing waves are closed by a material (15,18) permeable to microwaves. 9. Four à micro-ondes selon l'une des reven­dications 1 à 8, caractérisé en ce que les ouvertures de réception d'ondes sont équipées de volets de réglage mobiles (22) en matériau étanche aux micro-ondes.9. Microwave oven according to one of claims 1 to 8, characterized in that the wave receiving openings are equipped with mobile adjustment flaps (22) made of microwave-tight material. 10. Four à micro-ondes selon l'une des reven­dications 1 à 9, caractérisé en ce qu'il comprend des moyens d'immobilisation (25) du récipient à l'encontre d'une rotation autour d'un axe vertical.10. Microwave oven according to one of claims 1 to 9, characterized in that it comprises means for immobilizing (25) the container against rotation about a vertical axis.
EP89401526A 1988-06-07 1989-06-02 Micro-wave oven equipped with a field distributor Expired - Lifetime EP0346194B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8807554A FR2632476B1 (en) 1988-06-07 1988-06-07 MICROWAVE OVEN HAVING A WAVE DISTRIBUTOR
FR8807554 1988-06-07

Publications (2)

Publication Number Publication Date
EP0346194A1 true EP0346194A1 (en) 1989-12-13
EP0346194B1 EP0346194B1 (en) 1993-01-13

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EP89401526A Expired - Lifetime EP0346194B1 (en) 1988-06-07 1989-06-02 Micro-wave oven equipped with a field distributor

Country Status (7)

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US (1) US4937418A (en)
EP (1) EP0346194B1 (en)
CA (1) CA1312121C (en)
DE (1) DE68904357T2 (en)
ES (1) ES2037440T3 (en)
FR (1) FR2632476B1 (en)
GR (1) GR3007259T3 (en)

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EP0788296B1 (en) 1994-04-07 2005-03-23 Matsushita Electric Industrial Co., Ltd. High-frequency heating device
EP1220571A2 (en) * 1994-10-20 2002-07-03 Matsushita Electric Industrial Co., Ltd. High frequency heating apparatus
AU7438796A (en) * 1995-10-11 1997-04-30 Wynberg, Daan Cooking utensil with stirring device for microwave oven
KR100200063B1 (en) * 1995-11-10 1999-06-15 전주범 Improved structure of microwave oven
KR100208693B1 (en) * 1996-12-27 1999-07-15 전주범 Microwave Waveguides with Improved Structure
US5919391A (en) * 1998-04-20 1999-07-06 Daewoo Electronics Co., Ltd. Microwave oven having arcuate concave portions in a cavity for distributing microwaves
US6268596B1 (en) * 1999-08-24 2001-07-31 Ut-Battelle, Llc Apparatus and method for microwave processing of liquids
GB2354144B (en) * 2000-03-23 2001-08-22 Merrychef Ltd Microwave heating
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KR20050122673A (en) * 2004-06-25 2005-12-29 삼성전자주식회사 Method and apparatus for power reduction of digital set-top box in stand-by mode
US7498548B2 (en) * 2006-05-02 2009-03-03 Ranger Research, Inc. Microwave heating system and method for removing volatiles from adsorbent materials
GB2488335B (en) * 2011-02-23 2013-03-13 Licotec Ind Ltd Mixer for use in a microwave oven
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Also Published As

Publication number Publication date
EP0346194B1 (en) 1993-01-13
DE68904357D1 (en) 1993-02-25
FR2632476A1 (en) 1989-12-08
FR2632476B1 (en) 1990-08-31
US4937418A (en) 1990-06-26
GR3007259T3 (en) 1993-07-30
DE68904357T2 (en) 1993-08-19
CA1312121C (en) 1992-12-29
ES2037440T3 (en) 1993-06-16

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