EP0151435A2 - Microwave oven with a wave stirrer - Google Patents

Microwave oven with a wave stirrer Download PDF

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Publication number
EP0151435A2
EP0151435A2 EP85100703A EP85100703A EP0151435A2 EP 0151435 A2 EP0151435 A2 EP 0151435A2 EP 85100703 A EP85100703 A EP 85100703A EP 85100703 A EP85100703 A EP 85100703A EP 0151435 A2 EP0151435 A2 EP 0151435A2
Authority
EP
European Patent Office
Prior art keywords
enclosure
axis
shaft
stirrer
microwave oven
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85100703A
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German (de)
French (fr)
Other versions
EP0151435B1 (en
EP0151435A3 (en
Inventor
Jean-François Mary Société MOULINEX Lemoine
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.)
Moulinex SA
Original Assignee
Moulinex SA
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 Moulinex SA filed Critical Moulinex SA
Priority to AT85100703T priority Critical patent/ATE35735T1/en
Publication of EP0151435A2 publication Critical patent/EP0151435A2/en
Publication of EP0151435A3 publication Critical patent/EP0151435A3/en
Application granted granted Critical
Publication of EP0151435B1 publication Critical patent/EP0151435B1/en
Expired 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
    • H05B6/74—Mode transformers or mode stirrers

Definitions

  • the invention relates to microwave ovens equipped with a wave brewer.
  • microwave ovens comprising a cooking enclosure, a microwave generator delivering microwave energy to said enclosure via a waveguide carried by the one of the walls of the enclosure, and a wave stirrer disposed at the outlet of the waveguide and comprising a rotary shaft carrying a flange equipped with a series of metal blades intended to ensure energy distribution in the pregnant.
  • the object of the invention is to improve the regularity of energy distribution in all the regions of the enclosure.
  • the stirrer shaft is mounted inclined with respect to an axis perpendicular to the wall of the enclosure and is itself subjected to a drive mechanism which causes it to move slowly, during its rotation, on a conical surface whose axis coincides with said perpendicular axis, the flange and the blades of the brewer thus describing, during their rotation around the shaft, a slow nutation movement around said axis.
  • the microwave oven of Figure 1 has a cooking enclosure 10, a microwave generator 12 delivering microwave energy in the enclosure 10 via a waveguide 14 carried by the upper wall 16 of the enclosure, and a wave stirrer 18 disposed at the outlet of the wave guide 14 and comprising a rotary shaft 20 carrying a flange 22 equipped with a series of metal blades 24 intended to ensure distribution energy in the enclosure 10. Between the stirrer 18 and the enclosure 10 is disposed a protective cover 26 made of material permeable to microwaves.
  • the shaft 20 of the stirrer 18 is mounted inclined relative to a vertical axis 28 and is itself subjected to a drive mechanism 30 which causes it to move slowly during its rotation on a conical surface 32 whose axis coincides with axis 28; the flange 22 and the blades 24 thus describe, during their rotation around the shaft 20, a slow nutation movement around said axis.
  • the shaft 20 of the stirrer is mounted in an inclined bearing 34 arranged in a plate 36 which the drive mechanism 30 rotates slowly around the axis 28 on a horizontal circular seat 38 arranged in a housing 40 fixed to the wall 16.
  • the inclined bearing 34 is located in the center of the horizontal circular seat 38.
  • the stirrer 18 is rotated by the stream of cooling air from the microwave generator 12, this by the action of this stream (arrow F) on the blades 24.
  • the mechanism 30 for driving the rotating plate 36 is constituted by a speed reducer interposed between the shaft 20 and this plate.
  • this speed reducer comprises a bevel gear 42 which is integral with the shaft 20 and which is engaged with a train of several gears which are carried by the plate 36 and whose der. deny 44 is engaged with a fixed toothed crown 46 formed in the housing 40 and concentric with the vertical axis 28.
  • This gear train comprises a first wheel 48 which is engaged with the bevel pinion 42 and which is integral with a pinion 50.
  • This pinion 50 is engaged with a second wheel 52 which is integral with the pinion 44.
  • the first wheel 48 and its pinion 50 are mounted on a bearing 54; the second wheel 52 and its pinion 44 are mounted on a bearing 56; the bearings 54 and 56 are located on the upper face of the plate 36.
  • the air flow rotates the wave stirrer 18 at a speed of the order of, for example, sixty revolutions per minute.
  • This movement is communicated to the pinions and wheels 42, 48, 50, 52 and 44.
  • the pinion 44 rolling in the ring gear 46, drives in this movement its bearing 56 (arrow G in FIG. 3) and, consequently, the plate 36 according to a slow rotational movement inside the housing 40, this at a speed of the order, for example, of a revolution and a half per minute.
  • the axis of the shaft 20 of the wave stirrer moves slowly on the conical surface 32 during the rotation of this shaft, that is to say that the brewer 18, and leaving its blades 24, are animated, during their rotation, of a slow nutation movement.
  • the consecutive variations in inclination of the blades 24 ensure good distribution of the microwave energy in all the regions of the enclosure 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Photoreceptors In Electrophotography (AREA)

Abstract

1. A microwave oven compr sing a cooking enclosure (10), a microwave generator (12) delivering the microwave energy in the said enclosure (10) by the intermediation of a wave guide (14) carried on one of the walls (16) of the enclosure (10), and a wave stirrer (18) disposed at the mouth of the said wave guide (14) and comprising a rotating shaft (20) carrying a flange (22) equipped with a series of metallic blades (24) intended to ensure distribution of energy in the enclosure (10), characterized in that the shaft (20) of the stirrer (18) is mounted inclined in relation to an axis (28) perpendicular to the said wall (16) of the enclosure and is its elf subjected to an entrainment mechanism (30) which causes it to be slowly displaced, during its rotation, over a conical surface (32) the axis of which is identical with the said perpendicular axis (28), the said flange (22) and the blades (24) consequently describing, during their rotation about the shaft (20), a slow nutation movement about the said axis (28).

Description

L'invention se rapporte aux fours à micro-ondes équipés d'un brasseur d'ondes.The invention relates to microwave ovens equipped with a wave brewer.

Elle concerne, plus précisément, les fours à micro-ondes comportant une enceinte de cuisson, un générateur de micro-ondes délivrant l'énergie à micro-ondes dans ladite enceinte par l'intermédiaire d'un guide d'ondes porté par l' une des parois de l'enceinte, et un brasseur d'ondes disposé au débouché du guide d'ondes et comprenant un arbre rotatif portant un flasque équipé d'une série de pales métalliques destinées à assurer une distribution de l'énergie dans l'enceinte.More specifically, it relates to microwave ovens comprising a cooking enclosure, a microwave generator delivering microwave energy to said enclosure via a waveguide carried by the one of the walls of the enclosure, and a wave stirrer disposed at the outlet of the waveguide and comprising a rotary shaft carrying a flange equipped with a series of metal blades intended to ensure energy distribution in the pregnant.

L'invention a pour but d'améliorer la régularité de distribution de l'énergie dans toutes les régions de l'enceinte.The object of the invention is to improve the regularity of energy distribution in all the regions of the enclosure.

Selon l'invention, l'arbre du brasseur est monté incliné par rapport à un axe perpendiculaire à la paroi de l'enceinte et est lui-même soumis à un mécanisme d'entraînement qui l'amène à.se déplacer lentement, pendant sa rotation, sur une surface conique dont l'axe est confondu avec ledit axe perpendiculaire, le flasque et les pales du brasseur décrivant ainsi, pendant leur rotation autour de l'arbre, un mouvement de nutation lente autour dudit axe.According to the invention, the stirrer shaft is mounted inclined with respect to an axis perpendicular to the wall of the enclosure and is itself subjected to a drive mechanism which causes it to move slowly, during its rotation, on a conical surface whose axis coincides with said perpendicular axis, the flange and the blades of the brewer thus describing, during their rotation around the shaft, a slow nutation movement around said axis.

Ainsi, les variations d'inclinaison des pales du brasseur pendant le fonctionnement du four assurent pratiquement qu'aucune zone de l'espace interne à l'enceinte n'échappe à l'atteinte des micro-ondes.Thus, the variations in inclination of the blades of the brewer during the operation of the furnace practically ensure that no area of the internal space of the enclosure escapes the reach of microwaves.

Les caractéristiques et avantages de l'invention ressortiront d'ailleurs de la description qui va suivre, à titre d' exemple, en référence aux dessins annexés dans lesquels :

  • la figure 1 est une vue schématique d'un four à micro-ondes équipé d'un brasseur d'ondes ; la figure 2 représente, à plus grande échelle, une coupe verticale du brasseur d'ondes et du mécanisme d'entrainement ; la figure 3 est une vue de dessus du mécanisme d'entraînement et du boîtier qui le renferme, la figure 4 est une vue schématique développée du mécanisme d'entraînement.
The characteristics and advantages of the invention will become apparent from the description which follows, by way of example, with reference to the appended drawings in which:
  • Figure 1 is a schematic view of a microwave oven equipped with a wave brewer; Figure 2 shows, on a larger scale, a vertical section of the wave brewer and the drive mechanism; Figure 3 is a top view of the drive mechanism and the housing which contains it, Figure 4 is a schematic developed view of the drive mechanism.

Le four à micro-ondes de la figure 1 comporte une enceinte de cuisson 10, un générateur de micro-ondes 12 délivrant l' énergie à micro-ondes dans l'enceinte 10 par l'intermédiaire d'un guide d'ondes 14 porté par la paroi supérieure 16 de l'enceinte, et un brasseur d'ondes 18 disposé au débouché du guide d'ondes 14 et comprenant un arbre rotatif 20 portant un flasque 22 équipé d'une série de pales métalliques 24 destinées à assurer une distribution de l'énergie dans l'enceinte 10. Entre le brasseur 18 et l'enceinte 10 est disposé un cache de protection 26 en matière perméable aux micro-ondes.The microwave oven of Figure 1 has a cooking enclosure 10, a microwave generator 12 delivering microwave energy in the enclosure 10 via a waveguide 14 carried by the upper wall 16 of the enclosure, and a wave stirrer 18 disposed at the outlet of the wave guide 14 and comprising a rotary shaft 20 carrying a flange 22 equipped with a series of metal blades 24 intended to ensure distribution energy in the enclosure 10. Between the stirrer 18 and the enclosure 10 is disposed a protective cover 26 made of material permeable to microwaves.

L'arbre 20 du brasseur 18 est monté incliné par rapport à un axe vertical 28 et est lui-même soumis à un mécanisme d' entraînement 30 qui l'amène à se déplacer lentement pendant sa rotation sur une surface conique 32 dont l'axe est confondu avec l'axe 28 ; le flasque 22 et les pales 24 décrivent ainsi, pendant leur rotation autour de l'arbre 20, un mouvement de nutation lente autour dudit axe.The shaft 20 of the stirrer 18 is mounted inclined relative to a vertical axis 28 and is itself subjected to a drive mechanism 30 which causes it to move slowly during its rotation on a conical surface 32 whose axis coincides with axis 28; the flange 22 and the blades 24 thus describe, during their rotation around the shaft 20, a slow nutation movement around said axis.

Comme on le voit bien sur la figure 2, l'arbre 20 du brasseur est monté dans un palier incliné 34 aménagé dans un plateau 36 que le mécanisme d'entraînement 30 fait tourner lentement autour de l'axe 28 sur un siège circulaire horizontal 38 agencé dans un boîtier 40 fixé à la paroi 16. Le palier incliné 34 est situé au centre du siège circulaire horizontal 38.As can be seen in FIG. 2, the shaft 20 of the stirrer is mounted in an inclined bearing 34 arranged in a plate 36 which the drive mechanism 30 rotates slowly around the axis 28 on a horizontal circular seat 38 arranged in a housing 40 fixed to the wall 16. The inclined bearing 34 is located in the center of the horizontal circular seat 38.

Le brasseur 18 est mis en rotation par le courant d'air de refroidissement du générateur de micro-ondes 12, ceci par action de ce courant (flèche F) sur les pales 24.The stirrer 18 is rotated by the stream of cooling air from the microwave generator 12, this by the action of this stream (arrow F) on the blades 24.

Le mécanisme 30 d'entraînement du plateau tournant 36 est constitué par un réducteur de vitesse interposé entre l'arbre 20 et ce plateau.The mechanism 30 for driving the rotating plate 36 is constituted by a speed reducer interposed between the shaft 20 and this plate.

Comme on le voit bien sur les figures 3 et 4, ce réducteur de vitesse comprend un pignon conique 42 qui est solidaire de l'arbre 20 et qui est en prise avec un train de plusieurs engrenages qui sont portés par le plateau 36 et dont le der. nier 44 est en prise avec une couronne dentée fixe 46 ménagée dans le boîtier 40 et concentrique à l'axe vertical 28. Ce train d'engrenages comprend une première roue 48 qui est en prise avec le pignon conique 42 et qui est solidaire d' un pignon 50. Ce pignon 50 est en prise avec une seconde roue 52 qui est solidaire du pignon 44. La première roue 48 et son pignon 50 sont montées sur un palier 54 ; la seconde roue 52 et son pignon 44 sont montées sur un palier 56 ; les paliers 54 et 56 sont implantés sur la face supérieure du plateau 36.As can be seen in Figures 3 and 4, this speed reducer comprises a bevel gear 42 which is integral with the shaft 20 and which is engaged with a train of several gears which are carried by the plate 36 and whose der. deny 44 is engaged with a fixed toothed crown 46 formed in the housing 40 and concentric with the vertical axis 28. This gear train comprises a first wheel 48 which is engaged with the bevel pinion 42 and which is integral with a pinion 50. This pinion 50 is engaged with a second wheel 52 which is integral with the pinion 44. The first wheel 48 and its pinion 50 are mounted on a bearing 54; the second wheel 52 and its pinion 44 are mounted on a bearing 56; the bearings 54 and 56 are located on the upper face of the plate 36.

Ainsi, le courant d'air (flèche F) entraîne en rotation le brasseur d'ondes 18 à une vitesse de l'ordre, par exemple, de soixante tours par minute. Ce mouvement est communiqué .aux pignons et roues 42, 48, 50, 52 et 44. Le pignon 44, roulant dans la couronne dentée 46, entraîne dans ce mouvement son palier 56 (flèche G de la figure 3) et, partant, le plateau 36 selon un mouvement de rotation lente à l'intérieur du boîtier 40, ceci à une vitesse de l'ordre, par exemple, d'un tour et demi par minute.Thus, the air flow (arrow F) rotates the wave stirrer 18 at a speed of the order of, for example, sixty revolutions per minute. This movement is communicated to the pinions and wheels 42, 48, 50, 52 and 44. The pinion 44, rolling in the ring gear 46, drives in this movement its bearing 56 (arrow G in FIG. 3) and, consequently, the plate 36 according to a slow rotational movement inside the housing 40, this at a speed of the order, for example, of a revolution and a half per minute.

Du fait de l'inclinaison du palier 34 sur le plateau 36, l'axe de l'arbre 20 du brasseur d'ondes se déplace lentement sur la surface conique 32 pendant la rotation de cet arbre, c'est-à-dire que le brasseur 18, et partant ses pales 24, sont animés, pendant leur rotation, d'un mouvement de nutation lente. Les variations consécutives d'inclinaison des pales 24 assurent une bonne répartition de l'énergie à micro-ondes dans toutes les régions de l'enceinte 10.Due to the inclination of the bearing 34 on the plate 36, the axis of the shaft 20 of the wave stirrer moves slowly on the conical surface 32 during the rotation of this shaft, that is to say that the brewer 18, and leaving its blades 24, are animated, during their rotation, of a slow nutation movement. The consecutive variations in inclination of the blades 24 ensure good distribution of the microwave energy in all the regions of the enclosure 10.

Claims (4)

1. Four à micro-ondes comportant une enceinte de cuisson (10), un générateur de micro-ondes (12) délivrant l'énergie à micro-ondes dans ladite enceinte (10) par l'intermédiaire d'un guide d'ondes (14) porté par l'une des parois (16) de l'enceinte (10), et un brasseur d'ondes (18) disposé au débouché dudit guide d'ondes (14) et comprenant un arbre rotatif (20) portant un flasque (22) équipé d'une série de pales métalliques (24) destinées à assurer une distribution de l'énergie dans l'enceinte (10),
caractérisé en ce que l'arbre (20) du brasseur (18) est monté incliné par rapport à un axe (28) perpendiculaire à ladite paroi (16) de l'enceinte et est lui-même soumis à un mécanisme d'entraînement (30) qui l'amène à se déplacer lentement pendant sa rotation sur une surface conique (32) dont l'axe est confondu avec ledit axe perpendiculaire (28), ledit flasque (22) et les pales (24) décrivant ainsi, pendant leur rotation autour de l'arbre (20), un mouvement de nutation lente autour dudit axe (28).1. Microwave oven comprising a cooking enclosure (10), a microwave generator (12) delivering microwave energy into said enclosure (10) via a waveguide (14) carried by one of the walls (16) of the enclosure (10), and a wave stirrer (18) disposed at the outlet of said waveguide (14) and comprising a rotary shaft (20) carrying a flange (22) fitted with a series of metal blades (24) intended to distribute the energy in the enclosure (10),
characterized in that the shaft (20) of the stirrer (18) is mounted inclined with respect to an axis (28) perpendicular to said wall (16) of the enclosure and is itself subjected to a drive mechanism ( 30) which causes it to move slowly during its rotation on a conical surface (32) whose axis coincides with said perpendicular axis (28), said flange (22) and the blades (24) thus describing, during their rotation around the shaft (20), a slow nutation movement around said axis (28). 2. Four à micro-ondes selon la revendication 1,
caractérisé en ce que, ladite paroi (16) étant la paroi supérieure de l'enceinte (10), et ledit axe (28) étant alors vertical, l'arbre (20) du brasseur (18) est monté dans un palier incliné (34) aménagé dans un plateau (36) que le mécanisme d'entraînement (30) fait tourner lentement autour dudit axe vertical (28) sur un siège circulaire horizontal (38) agencé dans un boîtier (40) fixé à ladite paroi supérieure (16), ledit palier incliné (34) étant situé au centre dudit siège circulaire horizontal (38).2. Microwave oven according to claim 1,
characterized in that, said wall (16) being the upper wall of the enclosure (10), and said axis (28) then being vertical, the shaft (20) of the stirrer (18) is mounted in an inclined bearing ( 34) arranged in a plate (36) which the drive mechanism (30) rotates slowly around said vertical axis (28) on a horizontal circular seat (38) arranged in a housing (40) fixed to said upper wall (16 ), said inclined bearing (34) being located in the center of said horizontal circular seat (38). 3. Four à micro-ondes selon la revendication 2,
caractérisé en ce que, le brasseur (18) étant mis en rotation par le courant d'air de refroidissement (F) du générateur de micro-ondes (12), le mécanisme (30) d'entraînement du plateau tournant (36) est constitué par un réducteur de vitesse interposé entre l'arbre (20) du brasseur et ce plateau (36).3. Microwave oven according to claim 2,
characterized in that, the stirrer (18) being rotated by the stream of cooling air (F) from the microwave generator (12), the mechanism (30) for driving the turntable (36) is constituted by a speed reducer interposed between the shaft (20) of the brewer and this plate (36). 4. Four à micro-ondes selon la revendication 3,
caractérisé en ce que le réducteur de vitesse comprend un pignon conique (42) qui est solidaire de l'arbre (20) du brasseur et qui est en prise avec un train de plusieurs engrenages dont chacun est monté par un palier (54, 56) implanté sur le plateau (36) lui-même, le dernier engrenage (44) de ce train étant en prise avec une couronne dentée fixe (46) ménagée dans le boîtier (40) et concentrique audit axe vertical (28), ce dernier engrenage (44) entraînant ainsi le plateau (36) dans un mouvement de rotation lente à l' intérieur du boîtier (40).4. Microwave oven according to claim 3,
characterized in that the speed reducer comprises a bevel gear (42) which is integral with the shaft (20) of the stirrer and which is engaged with a train of several gears each of which is mounted by a bearing (54, 56) implanted on the plate (36) itself, the last gear (44) of this train being engaged with a fixed toothed ring (46) formed in the housing (40) and concentric with said vertical axis (28), the latter gear (44) thus causing the plate (36) in a slow rotational movement inside the housing (40).
EP85100703A 1984-01-26 1985-01-24 Microwave oven with a wave stirrer Expired EP0151435B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85100703T ATE35735T1 (en) 1984-01-26 1985-01-24 MICROWAVE OVEN WITH A WAVE STIRRER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8401205A FR2558936B1 (en) 1984-01-26 1984-01-26 MICROWAVE OVEN EQUIPPED WITH A WAVE BREAKER
FR8401205 1984-01-26

Publications (3)

Publication Number Publication Date
EP0151435A2 true EP0151435A2 (en) 1985-08-14
EP0151435A3 EP0151435A3 (en) 1987-05-06
EP0151435B1 EP0151435B1 (en) 1988-07-13

Family

ID=9300503

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85100703A Expired EP0151435B1 (en) 1984-01-26 1985-01-24 Microwave oven with a wave stirrer

Country Status (6)

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EP (1) EP0151435B1 (en)
AT (1) ATE35735T1 (en)
DE (1) DE3563791D1 (en)
ES (1) ES284148Y (en)
FR (1) FR2558936B1 (en)
PT (1) PT79876B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2637356A2 (en) * 1984-01-26 1990-04-06 Moulinex Sa Microwave oven equipped with a wave agitator
WO2018041567A1 (en) 2016-09-02 2018-03-08 Arcelik Anonim Sirketi A microwave oven having a mode stirrer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2758705A1 (en) * 1976-12-30 1978-07-13 Raytheon Co ARRANGEMENT FOR THE CONTROL OF MICROWAVE GENERATORS, IN PARTICULAR IN MICROWAVE OVENS
DE2806158A1 (en) * 1978-02-14 1979-09-06 Bosch Siemens Hausgeraete DOUBLE OVEN, IN PARTICULAR BUILT-IN OVEN

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2758705A1 (en) * 1976-12-30 1978-07-13 Raytheon Co ARRANGEMENT FOR THE CONTROL OF MICROWAVE GENERATORS, IN PARTICULAR IN MICROWAVE OVENS
DE2806158A1 (en) * 1978-02-14 1979-09-06 Bosch Siemens Hausgeraete DOUBLE OVEN, IN PARTICULAR BUILT-IN OVEN

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2637356A2 (en) * 1984-01-26 1990-04-06 Moulinex Sa Microwave oven equipped with a wave agitator
WO2018041567A1 (en) 2016-09-02 2018-03-08 Arcelik Anonim Sirketi A microwave oven having a mode stirrer

Also Published As

Publication number Publication date
FR2558936A1 (en) 1985-08-02
FR2558936B1 (en) 1987-11-27
ATE35735T1 (en) 1988-07-15
PT79876A (en) 1985-02-01
PT79876B (en) 1986-09-15
EP0151435B1 (en) 1988-07-13
ES284148U (en) 1985-08-01
ES284148Y (en) 1986-04-16
EP0151435A3 (en) 1987-05-06
DE3563791D1 (en) 1988-08-18

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