Nothing Special   »   [go: up one dir, main page]

EP0489383A2 - Control system for microwave oven - Google Patents

Control system for microwave oven Download PDF

Info

Publication number
EP0489383A2
EP0489383A2 EP91120660A EP91120660A EP0489383A2 EP 0489383 A2 EP0489383 A2 EP 0489383A2 EP 91120660 A EP91120660 A EP 91120660A EP 91120660 A EP91120660 A EP 91120660A EP 0489383 A2 EP0489383 A2 EP 0489383A2
Authority
EP
European Patent Office
Prior art keywords
microwave
movable
oven
operating modes
grill
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
EP91120660A
Other languages
German (de)
French (fr)
Other versions
EP0489383B1 (en
EP0489383A3 (en
Inventor
Pierre Chartrain
Michel Guy De Matteis
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
Publication of EP0489383A2 publication Critical patent/EP0489383A2/en
Publication of EP0489383A3 publication Critical patent/EP0489383A3/en
Application granted granted Critical
Publication of EP0489383B1 publication Critical patent/EP0489383B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H05B6/647—Aspects related to microwave heating combined with other heating techniques
    • H05B6/6482—Aspects related to microwave heating combined with other heating techniques combined with radiant heating, e.g. infrared heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/08—Arrangement or mounting of control or safety devices

Definitions

  • the invention relates to the operation of a microwave oven and more particularly to a device for controlling the electrical supply circuit making it possible to select one of the following three operating modes: a first microwave mode or a second grill mode or a third mode in combined microwave grill.
  • microwave ovens have the three aforementioned operating modes and comprise on their external front face a movable mounted handle which acts, for example by its rotation by a user, on a single switch.
  • This switch selects, by its position, an operating mode chosen by the user.
  • This switch is generally bulky (it occupies an important place in the housing of the external front face of the microwave oven because of its large thickness) and is expensive.
  • this switch is also used on microwave ovens comprising only two operating modes (microwave or grill), which increases the cost price of these microwave ovens.
  • the object of the invention is to remedy these drawbacks by finding a simple and economical control device, easy to implement and which selects one of the three operating modes of such a microwave oven.
  • the control device comprises two micro-switches (A and B) mounted in said supply circuit, and which on the one hand, each comprise a control key actuating a movable contact located between two fixed contacts and controlled by actuation means carried by said movable handle so as to selectively obtain one of the three operating modes chosen by positioning the movable handle and, on the other hand, are positioned inside said oven in a regulating and supply device authorizing the operation of the microwave oven.
  • a and B micro-switches
  • control device Thanks to the control device according to the invention, the space requirement is reduced since the control device has a thickness which does not exceed that of the housings of said microswitches and the possibility of using a single microswitch to perform a grill function. or microwave enables the price of the component to be halved, thereby reducing the cost price of the microwave oven.
  • FIG. 1 shows the external front face of a microwave oven on which is mounted the movable handle equipping the device according to the invention
  • FIG. 2 represents the control device according to the invention
  • FIG. 3 represents an example of use of the control device according to the invention placed in a microwave oven
  • FIG. 4 represents the electrical connections of the control device according to the invention.
  • the front part of the microwave oven F comprises a housing 1 comprising, inter alia, on its external front face, a handle 2 movable mounted of which only the front face is shown; this movable lever 2 is capable of selecting an operating mode of said oven.
  • These operating modes for example three in number, are a first mode in microwave (MO) or a second mode by resistance heating called grill or a third mode Grill combined with microwave (MO + grill).
  • the user for example, by rotating the movable lever 2, thus determines one of the operating modes which he desires.
  • This handle 2 is mounted movable about an axis XX 'transverse to the front face of the furnace.
  • the inner face of the housing 1 comprises, for example, the movable lever 2 whose rear face is shown, a microswitch A of conventional type fixed on the housing 1, for example by bonding and a microswitch B fixed on the housing 1 in the same way as the microswitch A.
  • the mobile joystick 2 is shown in any position not corresponding to a particular operating mode.
  • These microswitches A and B are positioned so that actuation means of the movable joystick 2 act alternately on the control keys 3 and 4 of each of the microswitches A and B.
  • the actuation means of the movable lever 2 consist, for example, of tongues 5 and 5 'fixed axially on the internal face of the movable lever 2 and each extending in an arc of circle concentric with the axis XX'; these tabs 5 and 5 ′ are, for example, two in number and are spaced apart by a determined distance to allow non-simultaneous actuation of the control keys 3 and 4 of each of the micro-switches A and B.
  • the micro- switches A and B are, for example, two-position microswitches. Each microswitch A or B has, for example, an input 6 or 6 'and two outputs 7 and 8 or 7' and 8 '.
  • the control device 30 placed on the internal front face of the housing 1 is connected to a regulation and supply device known per se in a microwave oven; said device includes, for example, a timer 9, a fan motor 10, a power supply 11, a relay 12 with contactor 15, a resistor 13 ensuring the grill operation, a transformer 14 of the magnetron M (shown in dashed lines) allowing the microwave operation, and safety systems S1, S2, S3 and S4 ensuring the proper functioning of the oven.
  • a regulation and supply device known per se in a microwave oven; said device includes, for example, a timer 9, a fan motor 10, a power supply 11, a relay 12 with contactor 15, a resistor 13 ensuring the grill operation, a transformer 14 of the magnetron M (shown in dashed lines) allowing the microwave operation, and safety systems S1, S2, S3 and S4 ensuring the proper functioning of the oven.
  • the control device 30 comprises an input 16 connected directly to the timer 9 shown in FIG. 3 and two outputs 17 and 18 connected respectively to the transformer 14 of the magnetron M and to the relay 12 triggering the operation of the resistor 13
  • the input 16 of the control device is divided into two lines 19 and 20, one 19 is connected to the input 6 of the microswitch A and the other 20 is connected to the input 6 'of the microswitch. switch B.
  • On the input 6 of the micro-switch A is fixed a first movable contact 21 controlled by the key 3; this movable contact 21 allows switching between two fixed contacts 22 and 23 linked respectively to outputs 7 and 8 of microswitch A.
  • the output 7 is not connected to any element, the output 8 is connected to the transformer 14 of the magnetron thus ensuring , when the movable contact 21 has been switched, the microwave operation.
  • a second movable contact 24 is fixed, controlled by the key 4; this movable contact 24 allows switching between two fixed contacts 25 and 26 linked respectively to the outputs 7 'and 8' of the microswitch B.
  • the output 7 ' is connected to the relay 12 controlling the resistor 13 which ensures the operation in grill mode.
  • the output 8 ' is connected to the output 8 of the microswitch A by an electrical connection 31 and therefore allows operation in microwave mode.
  • An operation of the control device is, for example, as follows: in the initial state, the movable lever 2 being in the position MO, one of the tongues 5 of the means for actuating the lever 2 activates only the control button 4 of microswitch B while the control button 3 of microswitch A is not activated, thus leaving the movable contact 21 of microswitch A in a rest position since it is connected to the output 7.
  • the control button 4 allows the switching of the movable contact 24 which thus activates the output 8 ', that is to say the output ensuring the operation in MO.
  • the movable lever 2 rotating, for example by a quarter of a turn, is in the grill position as mentioned on the external front face of the housing of the microwave oven shown in FIG. 1.
  • said tongue 5 of the means actuating the movable lever 2 deactivates the control button 4 of the microswitch B thus acting on the movable contact 24; the latter allows the connection of the input 6 'to the output 7', that is to say to the output connected to the resistor 13 of the operation in grill mode, while the other tab 5 'does not always act not on control button 3 of microswitch A which remains inactive and occupies the same position as in the previous mode.
  • the movable lever 2 performing a second quarter turn is in the position (MO + grill) as mentioned on the external front face of the microwave oven housing shown in FIG. 1.
  • the control button 4 of the microswitch B is always deactivated and therefore allows the connection of the input 6 'with the output 7', on the other hand, the control key 3 of the microswitch A is activated by the tongue 5 'of the actuating means of the mobile joystick 2.
  • the movable contact 21 is thus switched and activates the output 8 of the microswitch A which is connected to the transformer 14 of the magnetron ensuring microwave operation. In this way, the combined microwave grill operation is obtained.
  • the control device can be easily simplified. Indeed, in such a case, it suffices to delete one of the two micro-switches, in this case the micro-switch A, and the micro-switch B ensures the desired operation, namely microwave or grill. This solution thus reduces the cost of the initial component which decreases the overall cost price of the microwave oven.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Ovens (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Vending Machines For Individual Products (AREA)

Abstract

The invention relates to a control system for the electrical supply circuit of a microwave oven with three operating modes (microwave or grill or grill and microwave combined) comprising a movable knob placed on the external front face of the case of the said microwave oven and which, when activated, enables one of the three operating modes to be chosen. According to the invention, the control system includes two micro-switches (A-B), on the one hand, each including a control key (3-4) actuating a movable contact (21-24) located between two fixed contacts (22, 23-25, 26) controlled by actuating means carried by the said movable knob so as selectively to obtain one of the three operating modes chosen by positioning the movable knob and, on the other hand, positioned inside the said oven in a regulation and supply device allowing the microwave oven to operate. Application to microwave ovens. <IMAGE>

Description

L'invention concerne le fonctionnement d'un four micro-ondes et plus particulièrement un dispositif de commande du circuit d'alimentation électrique permettant de sélectionner un des trois modes de fonctionnement suivants : un premier mode en micro-ondes ou un deuxième mode en gril ou un troisième mode en gril combiné micro-ondes.The invention relates to the operation of a microwave oven and more particularly to a device for controlling the electrical supply circuit making it possible to select one of the following three operating modes: a first microwave mode or a second grill mode or a third mode in combined microwave grill.

Certains fours micro-ondes possèdent les trois modes de fonctionnement précités et comportent sur leur face avant externe une manette montée mobile qui agit, par exemple par sa mise en rotation par un utilisateur, sur un unique commutateur. Ce commutateur sélectionne, par sa position, un mode de fonctionnement choisi par l'utilisateur. Ce commutateur est généralement encombrant (il occupe une place importante dans le boîtier de la face avant externe du four micro-ondes du fait de sa large épaisseur) et est coûteux. D'autre part ce commutateur est utilisé également sur les fours micro-ondes comportant uniquement deux modes de fonctionnement (micro-ondes ou gril) ce qui augmente le prix de revient de cesdits fours micro-ondes.Certain microwave ovens have the three aforementioned operating modes and comprise on their external front face a movable mounted handle which acts, for example by its rotation by a user, on a single switch. This switch selects, by its position, an operating mode chosen by the user. This switch is generally bulky (it occupies an important place in the housing of the external front face of the microwave oven because of its large thickness) and is expensive. On the other hand, this switch is also used on microwave ovens comprising only two operating modes (microwave or grill), which increases the cost price of these microwave ovens.

Le but de l'invention est de remédier à ces inconvénients en trouvant un dispositif de commande simple et économique, facile à mettre en oeuvre et qui sélectionne l'un des trois modes de fonctionnement d'un tel four micro-ondes.The object of the invention is to remedy these drawbacks by finding a simple and economical control device, easy to implement and which selects one of the three operating modes of such a microwave oven.

Selon l'invention, le dispositif de commande comporte deux micro-commutateurs (A et B) montés dans ledit circuit d'alimentation, et qui d'une part, comprennent chacun une touche de commande actionnant un contact mobile situé entre deux contacts fixes et commandé par des moyens d'actionnement portés par ladite manette mobile de manière à obtenir sélectivement l'un des trois modes de fonctionnement choisi par un positionnement de la manette mobile et, d'autre part, sont positionnés à l'intérieur dudit four dans un dispositif de régulation et d'alimentation autorisant le fonctionnement du four micro-ondes.According to the invention, the control device comprises two micro-switches (A and B) mounted in said supply circuit, and which on the one hand, each comprise a control key actuating a movable contact located between two fixed contacts and controlled by actuation means carried by said movable handle so as to selectively obtain one of the three operating modes chosen by positioning the movable handle and, on the other hand, are positioned inside said oven in a regulating and supply device authorizing the operation of the microwave oven.

Grâce au dispositif de commande selon l'invention, l'encombrement est réduit puisque le dispositif de commande a une épaisseur qui ne dépasse pas celle des boîtiers desdits micro-commutateurs et la possibilité d'utiliser un seul micro-commutateur pour réaliser une fonction gril ou micro-ondes permet de diviser par deux le prix du composant diminuant ainsi le prix de revient du four micro-ondes.Thanks to the control device according to the invention, the space requirement is reduced since the control device has a thickness which does not exceed that of the housings of said microswitches and the possibility of using a single microswitch to perform a grill function. or microwave enables the price of the component to be halved, thereby reducing the cost price of the microwave oven.

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 représente la face avant externe d'un four micro-ondes sur lequel est monté la manette mobile équipant le dispositif selon l'invention ; la figure 2 représente le dispositif de commande selon l'invention ; la figure 3 représente un exemple d'utilisation du dispositif de commande selon l'invention placé dans un four à micro-ondes ; la figure 4 représente les connexions électriques du dispositif de commande selon l'invention.The characteristics and advantages of the invention will moreover emerge from the description which follows, by way of example, with reference to the appended drawings in which:
Figure 1 shows the external front face of a microwave oven on which is mounted the movable handle equipping the device according to the invention; FIG. 2 represents the control device according to the invention; FIG. 3 represents an example of use of the control device according to the invention placed in a microwave oven; FIG. 4 represents the electrical connections of the control device according to the invention.

Selon la figure 1, la partie avant du four à micro-ondes F comprend un boîtier 1 comportant, entre autre, sur sa face avant externe, une manette 2 montée mobile dont seule la face avant est représentée; cette manette mobile 2 est susceptible de sélectionner un mode de fonctionnement dudit four. Ces modes de fonctionnement, par exemple au nombre de trois, sont un premier mode en micro-ondes (MO) ou un deuxième mode par chauffage par résistance dit gril ou un troisième mode Gril combiné avec miro-ondes (MO + gril). L'utilisateur, par exemple, par une rotation de la manette mobile 2, détermine ainsi un des modes de fonctionnement qu'il désire. Cette manette 2 est montée mobile autour d'un axe XX' transversal à la face avant du four.According to Figure 1, the front part of the microwave oven F comprises a housing 1 comprising, inter alia, on its external front face, a handle 2 movable mounted of which only the front face is shown; this movable lever 2 is capable of selecting an operating mode of said oven. These operating modes, for example three in number, are a first mode in microwave (MO) or a second mode by resistance heating called grill or a third mode Grill combined with microwave (MO + grill). The user, for example, by rotating the movable lever 2, thus determines one of the operating modes which he desires. This handle 2 is mounted movable about an axis XX 'transverse to the front face of the furnace.

Selon la figure 2, la face interne du boîtier 1 comporte, par exemple, la manette mobile 2 dont la face arrière est représentée, un micro-commutateur A de type classique fixé sur le boîtier 1, par exemple par collage et un micro-commutateur B fixé sur le boîtier 1 de la même manière que le micro-commutateur A. Afin d'améliorer la compréhension du lecteur, la manette mobile 2 est représentée dans une position quelconque ne correspondant pas à un mode de fonctionnement particulier. Ces micro-commutateurs A et B sont positionnés de façon à ce que des moyens d'actionnement de la manette mobile 2 agissent alternativement sur les touches de commandes 3 et 4 de chacun des micro-commutateurs A et B. Les moyens d'actionnement de la manette mobile 2 sont constitués, par exemple, de languettes 5 et 5' fixées axialement sur la face interne de la manette mobile 2 et s'étendant chacune selon un arc de cercle concentrique à l'axe XX' ; ces languettes 5 et 5' sont, par exemple, au nombre de deux et sont espacées d'une distance déterminée pour autoriser l'actionnement non simultané des touches de commande 3 et 4 de chacun des micro-commutateurs A et B. Les micro-commutateurs A et B sont, par exemple, des micro-commutateurs deux positions. Chaque micro-commutateur A ou B comporte, par exemple, une entrée 6 ou 6' et deux sorties 7 et 8 ou 7' et 8'.According to Figure 2, the inner face of the housing 1 comprises, for example, the movable lever 2 whose rear face is shown, a microswitch A of conventional type fixed on the housing 1, for example by bonding and a microswitch B fixed on the housing 1 in the same way as the microswitch A. In order to improve the understanding of the reader, the mobile joystick 2 is shown in any position not corresponding to a particular operating mode. These microswitches A and B are positioned so that actuation means of the movable joystick 2 act alternately on the control keys 3 and 4 of each of the microswitches A and B. The actuation means of the movable lever 2 consist, for example, of tongues 5 and 5 'fixed axially on the internal face of the movable lever 2 and each extending in an arc of circle concentric with the axis XX'; these tabs 5 and 5 ′ are, for example, two in number and are spaced apart by a determined distance to allow non-simultaneous actuation of the control keys 3 and 4 of each of the micro-switches A and B. The micro- switches A and B are, for example, two-position microswitches. Each microswitch A or B has, for example, an input 6 or 6 'and two outputs 7 and 8 or 7' and 8 '.

Selon la figure 3, le dispositif de commande 30 placé sur la face avant interne du boîtier 1 est relié à un dispositif de régulation et d'alimentation connu en soi dans un four micro-ondes ; cedit dispositif comprend, par exemple, une minuterie 9, un motoventilateur 10, une alimentation 11, un relais 12 à contacteur 15, une résistance 13 assurant le fonctionnement en gril, un transformateur 14 du magnétron M (schématisé en traits interrompus) permettant le fonctionnement micro-ondes, et des systèmes de sécurités S1, S2, S3 et S4 assurant le bon fonctionnement du four.According to FIG. 3, the control device 30 placed on the internal front face of the housing 1 is connected to a regulation and supply device known per se in a microwave oven; said device includes, for example, a timer 9, a fan motor 10, a power supply 11, a relay 12 with contactor 15, a resistor 13 ensuring the grill operation, a transformer 14 of the magnetron M (shown in dashed lines) allowing the microwave operation, and safety systems S1, S2, S3 and S4 ensuring the proper functioning of the oven.

Selon la figure 4, le dispositif de commande 30 comporte une entrée 16 connectée directement à la minuterie 9 représentée à la figure 3 et deux sorties 17 et 18 reliées respectivement au transformateur 14 du magnétron M et au relais 12 déclenchant le fonctionnement de la résistance 13. L'entrée 16 du dispositif de commande se divise en deux lignes 19 et 20, l'une 19 est connectée à l'entrée 6 du micro-commutateur A et l'autre 20 est reliée à l'entrée 6' du micro-commutateur B. Sur l'entrée 6 du micro-commutateur A est fixée un premier contact mobile 21 commandé par la touche 3 ; ce contact mobile 21 permet la commutation entre deux contacts fixes 22 et 23 liés respectivement aux sorties 7 et 8 du micro-commutateur A. La sortie 7 n'est reliée à aucun élément, la sortie 8 est reliée au transformateur 14 du magnétron assurant ainsi, lorsque le contact mobile 21 a été commuté, le fonctionnement en micro-ondes. Sur l'entrée 6' du micro-commutateur B, est fixé un deuxième contact mobile 24 commandé par la touche 4 ; ce contact mobile 24 permet la commutation entre deux contacts fixes 25 et 26 liés respectivement aux sorties 7' et 8' du micro-commutateur B. La sortie 7' est reliée au relais 12 commandant la résistance 13 qui assure le fonctionnement en mode gril. La sortie 8' est reliée à la sortie 8 du micro-commutateur A par une liaison électrique 31 et permet donc ainsi un fonctionnement en mode micro-ondes.According to FIG. 4, the control device 30 comprises an input 16 connected directly to the timer 9 shown in FIG. 3 and two outputs 17 and 18 connected respectively to the transformer 14 of the magnetron M and to the relay 12 triggering the operation of the resistor 13 The input 16 of the control device is divided into two lines 19 and 20, one 19 is connected to the input 6 of the microswitch A and the other 20 is connected to the input 6 'of the microswitch. switch B. On the input 6 of the micro-switch A is fixed a first movable contact 21 controlled by the key 3; this movable contact 21 allows switching between two fixed contacts 22 and 23 linked respectively to outputs 7 and 8 of microswitch A. The output 7 is not connected to any element, the output 8 is connected to the transformer 14 of the magnetron thus ensuring , when the movable contact 21 has been switched, the microwave operation. On the input 6 ′ of the microswitch B, a second movable contact 24 is fixed, controlled by the key 4; this movable contact 24 allows switching between two fixed contacts 25 and 26 linked respectively to the outputs 7 'and 8' of the microswitch B. The output 7 'is connected to the relay 12 controlling the resistor 13 which ensures the operation in grill mode. The output 8 'is connected to the output 8 of the microswitch A by an electrical connection 31 and therefore allows operation in microwave mode.

Un fonctionnement du dispositif de commande selon l'invention est, par exemple, le suivant : à l'état initial, la manette mobile 2 étant sur la position MO, l'une des languettes 5 des les moyens d'actionnement de la manette 2 active uniquement la touche de commande 4 du micro-commutateur B alors que la touche de commande 3 du micro-commutateur A n'est pas activée laissant ainsi le contact mobile 21 du micro-commutateur A dans une position de repos puisque relié à la sortie 7. La touche de commande 4 permet la commutation du contact mobile 24 qui active ainsi la sortie 8' c'est-à-dire la sortie assurant le fonctionnement en MO.An operation of the control device according to the invention is, for example, as follows: in the initial state, the movable lever 2 being in the position MO, one of the tongues 5 of the means for actuating the lever 2 activates only the control button 4 of microswitch B while the control button 3 of microswitch A is not activated, thus leaving the movable contact 21 of microswitch A in a rest position since it is connected to the output 7. The control button 4 allows the switching of the movable contact 24 which thus activates the output 8 ', that is to say the output ensuring the operation in MO.

La manette mobile 2 tournant, par exemple d'un quart de tour, se trouve dans la position gril comme mentionné sur la face avant externe du boîtier du four micro-ondes représenté sur la figure 1. En cette position, ladite languette 5 des moyens d'actionnement de la manette mobile 2 désactive la touche de commande 4 du micro-commutateur B agissant ainsi sur le contact mobile 24 ; ce dernier permet la connexion de l'entrée 6' à la sortie 7', c'est-à-dire à la sortie relié à la résistance 13 du fonctionnement en mode gril, tandis que l'autre languette 5' n'agit toujours pas sur la touche de commande 3 du micro-commutateur A qui reste inactive et occupe la même position que dans le mode précédent.The movable lever 2 rotating, for example by a quarter of a turn, is in the grill position as mentioned on the external front face of the housing of the microwave oven shown in FIG. 1. In this position, said tongue 5 of the means actuating the movable lever 2 deactivates the control button 4 of the microswitch B thus acting on the movable contact 24; the latter allows the connection of the input 6 'to the output 7', that is to say to the output connected to the resistor 13 of the operation in grill mode, while the other tab 5 'does not always act not on control button 3 of microswitch A which remains inactive and occupies the same position as in the previous mode.

La manette mobile 2 effectuant un deuxième quart de tour, se trouve dans la position (MO + gril) comme mentionné sur la face avant externe du boîtier du four micro-ondes représenté sur la figure 1. La touche de commande 4 du micro-commutateur B est toujours désactivée et permet donc la liaison de l'entrée 6' avec la sortie 7', par contre, la touche de commande 3 du micro-commutateur A est activée par la languette 5' des moyens d'actionnement de la manette mobile 2. Le contact mobile 21 est ainsi commuté et active la sortie 8 du micro-commutateur A qui est reliée au transformateur 14 du magnétron assurant le fonctionnement micro-ondes. De cette manière, le fonctionnement gril combiné micro-ondes est obtenu.The movable lever 2 performing a second quarter turn, is in the position (MO + grill) as mentioned on the external front face of the microwave oven housing shown in FIG. 1. The control button 4 of the microswitch B is always deactivated and therefore allows the connection of the input 6 'with the output 7', on the other hand, the control key 3 of the microswitch A is activated by the tongue 5 'of the actuating means of the mobile joystick 2. The movable contact 21 is thus switched and activates the output 8 of the microswitch A which is connected to the transformer 14 of the magnetron ensuring microwave operation. In this way, the combined microwave grill operation is obtained.

Lors de l'utilisation d'un four micro-ondes à deux modes de fonctionnement (micro-ondes ou gril), le dispositif de commande peut être facilement simplifié. En effet, dans un tel cas, il suffit de supprimer un des deux micro-commutateurs, en l'occurrence le micro-commutateur A, et le micro-commutateur B assure le fonctionnement désiré à savoir micro-ondes ou gril. Cette solution diminue ainsi le coût du composant initial ce qui diminue le prix de revient global du four micro-ondes.When using a microwave oven with two operating modes (microwave or grill), the control device can be easily simplified. Indeed, in such a case, it suffices to delete one of the two micro-switches, in this case the micro-switch A, and the micro-switch B ensures the desired operation, namely microwave or grill. This solution thus reduces the cost of the initial component which decreases the overall cost price of the microwave oven.

Claims (2)

Dispositif de commande du circuit d'alimentation électrique d'un four micro-ondes permettant de sélectionner, par une manette montée mobile (2) sur la face avant externe du boîtier dudit four, un des modes de fonctionnement dudit four, lesdits modes de fonctionnement étant un premier mode en micro-ondes, un deuxième mode en chauffage par résistance dit gril et un troisième mode en gril combiné micro-ondes, caractérisé en ce qu'il comporte deux micro-commutateurs (A-B) montés dans lesdit circuits d'alimentation, et qui, d'une part, comportent chacun une touche de commande (3 - 4) actionnant un contact mobile (21-24) situé entre deux contacts fixes (22,23-25,26) et commandée par des moyens d'actionnement (5 - 5') portée par ladite manette mobile (2) de manière à obtenir sélectivement l'un des trois modes de fonctionnement choisi par un positionnement de la manette mobile (2) et, d'autre part, sont positionnés à l'intérieur dudit four au dos de la face avant externe du boîtierControl device for the electrical supply circuit of a microwave oven making it possible to select, by a movable handle (2) on the external front face of the housing of said oven, one of the operating modes of said oven, said operating modes being a first mode in microwave, a second mode in resistance heating called grill and a third mode in combined microwave grill, characterized in that it comprises two micro-switches (AB) mounted in said supply circuits , and which, on the one hand, each comprise a control key (3 - 4) actuating a movable contact (21-24) located between two fixed contacts (22,23-25,26) and controlled by means of actuation (5 - 5 ') carried by said movable handle (2) so as to selectively obtain one of the three operating modes chosen by positioning the movable handle (2) and, on the other hand, are positioned at the inside said oven on the back of the external front face d u housing Dispositif de commande selon la revendication 1, caractérisé en ce que la manette mobile (2) est montée mobile en rotation autour d'un axe (XX') transversal à la face avant du four et les moyens d'actionnement comportent des languettes (5-5') fixées axialement sur la face interne de ladite manette et s'étendant chacune selon un arc de cercle concentrique audit axe (XX'), tandis que les deux micro-commutateurs (A-B) sont disposés à la périphérie de la manette de manière que leur touche de commande (3 - 4) soit actionnée non simultanément par lesdites languettes.Control device according to claim 1, characterized in that the movable lever (2) is mounted movable in rotation about an axis (XX ') transverse to the front face of the furnace and the actuating means include tongues (5 -5 ') fixed axially on the internal face of said lever and each extending in an arc of a circle concentric with said axis (XX'), while the two micro-switches (AB) are arranged at the periphery of the lever so that their control button (3 - 4) is actuated not simultaneously by said tabs.
EP91120660A 1990-12-05 1991-12-02 Control system for microwave oven Expired - Lifetime EP0489383B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9015221 1990-12-05
FR9015221A FR2670273B1 (en) 1990-12-05 1990-12-05 DEVICE FOR CONTROLLING A MICROWAVE OVEN.

Publications (3)

Publication Number Publication Date
EP0489383A2 true EP0489383A2 (en) 1992-06-10
EP0489383A3 EP0489383A3 (en) 1992-09-30
EP0489383B1 EP0489383B1 (en) 1994-10-19

Family

ID=9402916

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91120660A Expired - Lifetime EP0489383B1 (en) 1990-12-05 1991-12-02 Control system for microwave oven

Country Status (7)

Country Link
EP (1) EP0489383B1 (en)
KR (1) KR100220255B1 (en)
AT (1) ATE113155T1 (en)
DE (1) DE69104697T2 (en)
ES (1) ES2064028T3 (en)
FR (1) FR2670273B1 (en)
PT (1) PT99682B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0609161A1 (en) * 1993-01-29 1994-08-03 Eaton Controls S.A. Control for combined microwave and grill oven
EP0750445A2 (en) * 1995-06-23 1996-12-27 Daewoo Electronics Co., Ltd Operational switch for a microwave oven
EP0756440A1 (en) * 1995-07-26 1997-01-29 Daewoo Electronics Co., Ltd Apparatus for controlling power of a microwave oven

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3046364A (en) * 1959-09-28 1962-07-24 Gen Railway Signal Co Token operated electrical switches
USRE27545E (en) * 1971-08-13 1973-01-09 Range open door latching device
FR2455247A1 (en) * 1979-04-24 1980-11-21 Tokyo Shibaura Electric Co HIGH FREQUENCY COOKING APPARATUS
GB2068182A (en) * 1980-01-21 1981-08-05 Tokyo Shibaura Electric Co High frequency heating apparatus
US4403128A (en) * 1976-03-11 1983-09-06 Sharp Kabushiki Kaisha Microwave oven with a capability of functioning as an electric heating oven

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3046364A (en) * 1959-09-28 1962-07-24 Gen Railway Signal Co Token operated electrical switches
USRE27545E (en) * 1971-08-13 1973-01-09 Range open door latching device
US4403128A (en) * 1976-03-11 1983-09-06 Sharp Kabushiki Kaisha Microwave oven with a capability of functioning as an electric heating oven
FR2455247A1 (en) * 1979-04-24 1980-11-21 Tokyo Shibaura Electric Co HIGH FREQUENCY COOKING APPARATUS
GB2068182A (en) * 1980-01-21 1981-08-05 Tokyo Shibaura Electric Co High frequency heating apparatus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0609161A1 (en) * 1993-01-29 1994-08-03 Eaton Controls S.A. Control for combined microwave and grill oven
FR2701094A1 (en) * 1993-01-29 1994-08-05 Eaton Controls Sa Electric microwave oven control with built-in grill.
EP0750445A2 (en) * 1995-06-23 1996-12-27 Daewoo Electronics Co., Ltd Operational switch for a microwave oven
EP0750445A3 (en) * 1995-06-23 1997-01-02 Daewoo Electronics Co., Ltd Operational switch for a microwave oven
US5728996A (en) * 1995-06-23 1998-03-17 Daewoo Electronics Co., Ltd. Operational switch for a microwave oven
EP0756440A1 (en) * 1995-07-26 1997-01-29 Daewoo Electronics Co., Ltd Apparatus for controlling power of a microwave oven

Also Published As

Publication number Publication date
ES2064028T3 (en) 1995-01-16
PT99682B (en) 1999-02-26
EP0489383B1 (en) 1994-10-19
PT99682A (en) 1994-01-31
EP0489383A3 (en) 1992-09-30
FR2670273B1 (en) 1998-03-06
DE69104697D1 (en) 1994-11-24
ATE113155T1 (en) 1994-11-15
DE69104697T2 (en) 1995-03-16
KR920012824A (en) 1992-07-27
KR100220255B1 (en) 1999-09-15
FR2670273A1 (en) 1992-06-12

Similar Documents

Publication Publication Date Title
EP1551261A2 (en) Electric kettle
FR2553598A1 (en) INTENSITY DRIVE SWITCH IN WALL BOX WITH MULTIPLE REMOTE CONTROL CONTACTS
EP0623859B1 (en) Cooking oven and its control panel
EP1049398B1 (en) Hand-held household electrical appliance, in particular food mixer
EP0489383B1 (en) Control system for microwave oven
EP0802547B1 (en) Security device for a mobile electric element and barbecue with such device
EP0402257B1 (en) Multi-function bread toaster
WO2001021030A1 (en) Hand-held electrical appliance such as a hair drier provided with position adjustable control members
FR2535569A1 (en) POWER SUPPLY SWITCHING ASSEMBLY FOR ELECTRIC RECEIVERS
FR2610703A1 (en) REGULATION AND CONTROL DEVICE FOR A GAS HEATED HOUSEHOLD COOKING OVEN WITH ADDITIONAL GRILL BURNER
FR2496022A1 (en) CONTROL DEVICE FOR OPTICAL AND SOUND ALARMS
FR2607579A1 (en) GAS COOKING OVEN, ESPECIALLY FOR HOUSEHOLD USE
FR2521384A1 (en) MOUNTING FOR THE POWER SUPPLY OF HEATING ELEMENTS OF THE COOKING TABLES OF ELECTRIC COOKERS
EP0724856B1 (en) Electric toaster and method for controlling the toasting of a food product in such an apparatus
FR2738666A1 (en) Three-position sprung control knob switch for electrical equipment, e.g. food processor
FR1461775A (en) Electrical equipment for intermittent or continuous operation of windscreen wipers, in particular for motor vehicles
EP0609161B1 (en) Control for combined microwave and grill oven
EP1402547B1 (en) Low-current starter switch for vehicles and starter gear comprising said switch
EP0727918B1 (en) Cooking device comprising a means for selecting a type of food and operating method for such a device
CH651680A5 (en) DEVICE FOR CONTROLLING THE ENERGY SUPPLY OF A GAS AND ELECTRICITY APPLIANCE.
FR2562214A1 (en) DEVICE FOR SELECTING SEQUENCES AND / OR TEMPERATURE OF A COOKING APPARATUS
FR2690226A3 (en) Selective shut down programmer for cooker rings or burners - uses preset timer to shut down preselected ring or burner via push rod and spring loaded control knob.
EP0463898A1 (en) Manual control device for thermal relay
FR3104684A3 (en) Control device for a domestic oven
FR2789283A3 (en) Power changeover device for food processing equipment

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT CH DE ES GB LI NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT CH DE ES GB LI NL SE

17P Request for examination filed

Effective date: 19920904

17Q First examination report despatched

Effective date: 19931129

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE ES GB LI NL SE

REF Corresponds to:

Ref document number: 113155

Country of ref document: AT

Date of ref document: 19941115

Kind code of ref document: T

REF Corresponds to:

Ref document number: 69104697

Country of ref document: DE

Date of ref document: 19941124

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19941108

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2064028

Country of ref document: ES

Kind code of ref document: T3

EAL Se: european patent in force in sweden

Ref document number: 91120660.5

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20001229

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20001231

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20011126

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20011213

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20011226

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20011227

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20011231

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20011231

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20020107

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020701

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20020701

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021202

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021202

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021203

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021203

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030701

GBPC Gb: european patent ceased through non-payment of renewal fee
EUG Se: european patent has lapsed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20021203