EP2242331A1 - Microwave oven including at least one lighting device - Google Patents

Microwave oven including at least one lighting device Download PDF

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Publication number
EP2242331A1
EP2242331A1 EP10159569A EP10159569A EP2242331A1 EP 2242331 A1 EP2242331 A1 EP 2242331A1 EP 10159569 A EP10159569 A EP 10159569A EP 10159569 A EP10159569 A EP 10159569A EP 2242331 A1 EP2242331 A1 EP 2242331A1
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EP
European Patent Office
Prior art keywords
cooking chamber
lighting device
microwave oven
light
cooking
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
EP10159569A
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German (de)
French (fr)
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EP2242331B1 (en
Inventor
Tom Snow
Régis Dando
Dany Ginzburg
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.)
FagorBrandt SAS
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FagorBrandt SAS
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Publication date
Application filed by FagorBrandt SAS filed Critical FagorBrandt SAS
Publication of EP2242331A1 publication Critical patent/EP2242331A1/en
Application granted granted Critical
Publication of EP2242331B1 publication Critical patent/EP2242331B1/en
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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
    • H05B6/6444—Aspects relating to lighting devices in the microwave cavity

Definitions

  • the present invention relates to a microwave oven equipped with at least one lighting device diffusing light through a tray in a cooking chamber.
  • microwave ovens are provided with a lighting device mounted on a side wall of the cooking chamber.
  • This lighting device comprises a support in which is mounted a lamp and said support is fixed on a side wall of the cooking chamber, in particular by resilient snapping.
  • the lighting device also includes a glass mounted on the support so as to close a housing containing the lamp. The verrine of the lighting device is directed towards the interior of the cooking chamber so as to diffuse light inside it.
  • microwave ovens have the disadvantage of diffusing the light non-uniformly since the lighting device is located on a side wall of the cooking chamber.
  • the article to be heated placed in the cooking chamber prevents the light emitted by a lighting device from a side wall of the cooking chamber from diffusing optimally towards the opposite side wall of said enclosure. cooking.
  • a document is also known GB 2 353 897 A which discloses a microwave oven comprising a cooking chamber, a turntable installed in the bottom wall of the cooking chamber, a microwave generation unit and a mesh member, hexagonal holes being formed in the honeycomb mesh element so as to improve the cut-off of microwave losses and to enlarge an opening surface for the diffusion of heat from a source of heat or light from a light source to the inside the cooking chamber.
  • the present invention aims to solve the aforementioned drawbacks and to provide a microwave oven for illuminating a cooking chamber uniformly and around an article to be heated placed in the cooking chamber.
  • the present invention provides a microwave cooking oven comprising a cooking chamber, said cooking chamber comprising at least one bottom wall, said cooking chamber comprising a plate housed in at least one depression of said bottom wall. said microwave cooking oven also comprising at least one lighting device located outside said cooking chamber.
  • said at least one lighting device of said microwave oven is used to illuminate a cooking chamber uniformly and around a heating article placed on the tray.
  • the plate makes it possible to diffuse the light in the lower part of the cooking chamber in a horizontal plane and to reflect the light from bottom to top in the cooking chamber.
  • the cooking chamber is uniformly illuminated by the at least one lighting device and without creating shadows in a part of the cooking chamber related to the space occupied by an article to heat on the tray.
  • said at least one lighting device located outside the cooking chamber and along an outer face of said at least one depression of the bottom wall of the cooking chamber is hidden by the tray since said at least one opening of said at least one depression of the bottom wall of the cooking chamber is located opposite a side wall of the tray.
  • Said at least one lighting device diffusing light through the plate can simulate the heating function of an electric hearth heating element, illuminating with a red light for example, from the bottom to the top in the cooking chamber so as to inform the user of the heating cycle of the article to be heated placed in the cooking chamber.
  • said at least one lighting device diffusing light through the plate and then inside the cooking chamber can make it possible to visualize a state of operation of the microwave oven according to the color shade of the light emitted and / or the intensity of the light emitted and / or the mode of continuous operation and / or alternating said at least one lighting device.
  • the user can monitor the operating status of the oven of microwave cooking while being remote or close without having to read the information indicated by a display.
  • Such an arrangement of said at least one lighting device makes it possible to improve the aesthetics of a microwave oven and to avoid glare for the user by said at least one lighting device during loading. and unloading the cooking chamber.
  • said microwave cooking oven comprises three lighting devices positioned equidistant from each other around said plate.
  • the three lighting devices emit light at three points equidistantly around the tray so that light scattered therein is evenly distributed.
  • the three lighting devices thus make it possible to guarantee a level of luminous intensity in the cooking chamber reliably and at the least cost.
  • Such a distribution of light around the plate by the three lighting devices eliminates the use of light guides having complex shapes and expensive.
  • a microwave oven 1 comprises a cooking chamber 2.
  • the cooking chamber 2 comprises at least one bottom wall 4.
  • a magnetron In order to supply high frequency energy to the cooking chamber 2 of a microwave cooking oven 1, a magnetron is conventionally provided, of which an antenna opens into a waveguide formed against a wall of the cooking chamber 2.
  • the microwave oven 1 may also include one or more heating elements, including radiant heating elements of the electric heater type. The presence of this or these heating elements in the microwave oven 1 thus allows to add a traditional cooking function.
  • the cooking chamber 2 comprises a plate 5 housed in at least one recess 6 of the bottom wall 4.
  • the plate 5 can be a turntable rotatably mounted on an axis 7 driven by a motor 8 or a still fixed plate installed in said at least one recess 6 of the bottom wall 4.
  • the microwave oven 1 comprises at least one lighting device 9 located outside the cooking chamber 2 and along an outer face 6a of the at least one recess 6 of the bottom wall 4 of the cooking chamber 2.
  • Said at least one depression 6 of the bottom wall 4 of the cooking chamber 2 comprises at least one opening 10 allowing the passage of the light emitted by said at least one lighting device 9 towards the interior of said cooking chamber 2.
  • the plate 5 comprises at least one side wall 11 placed opposite said at least one opening 10 of said at least one depression 6 of the bottom wall 4 of the cooking chamber 2 so as to diffuse light through said plateau 5.
  • said at least one lighting device 9 of the microwave cooking oven 1 makes it possible to illuminate a cooking chamber 2 in a uniform manner and all around an article to be heated placed on the plate 5.
  • the plate 5 makes it possible to diffuse the light in the lower part of the cooking chamber 2 along a horizontal plane and to reflect the light from bottom to top in the cooking chamber 2.
  • the cooking chamber 2 is uniformly illuminated by said at least one lighting device 9 and without creating shadows in a portion of the cooking chamber 2 related to the space occupied by an article to be heated placed on the plate 5.
  • the plate 5 serves as a light guide to the light emitted by said at least one lighting device 9 located outside the cooking chamber 2 and along an outer face 6a of said at least one recess 6 of the bottom wall 4 of the cooking chamber 2.
  • said at least one lighting device 9 located outside the cooking chamber 2 and along an outer face 6a of said at least one depression 6 of the bottom wall 4 of the cooking chamber 2 is hidden by the plate 5 since said at least one opening 10 of said at least one depression 6 of the bottom wall 4 of the cooking chamber 2 is located opposite a side wall 11 of the plate 5.
  • Said at least one lighting device 9 diffusing light through the plate 5 can be used to simulate the heating function of an electric sole heating element, by illuminating with a red light, for example, from the bottom towards the top in the cooking chamber 2 so as to inform the user of the heating cycle of the article to be heated placed in the cooking chamber 2.
  • said at least one lighting device 9 diffusing light through the plate 5 and then inside the cooking chamber 2 can make it possible to visualize an operating state of the microwave cooking oven 1 according to the color shade of the light emitted and / or the intensity of the light emitted and / or the mode of continuous operation and / or alternating said at least one lighting device 9.
  • the user can monitor the operating state of the microwave cooking oven 1 by being remote or close without having to read the information indicated by a display.
  • Such an arrangement of said at least one lighting device 9 makes it possible to improve the aesthetics of a microwave cooking oven 1 and to avoid glare for the user by said at least one lighting device 9 when loading and unloading the cooking chamber 2.
  • the plate 5 is of circular shape and is adapted to be inserted into a recess 6 of the lower wall 4 of the cooking chamber 2 also of circular shape.
  • the plate 5 is made of a material adapted to diffuse light, and in particular glass.
  • Said at least one opening 10 of said at least one recess 6 of the bottom wall 4 of the cooking chamber 2 comprises a plurality of holes 19.
  • the holes 19 of said at least one opening 10 formed in said at least one recess 6 of the bottom wall 4 of the cooking chamber 2 allow the light emitted by said at least one lighting device 9 to be diffused towards the plate 5 and are dimensioned so as to prevent the microwaves out through said holes 19.
  • the microwave oven 1 thus has the minimum of microwave leakage outside the oven. cooking chamber 2.
  • the sizing of the holes 19 of said at least one opening 10 formed in said at least one depression 6 of the bottom wall 4 of the cooking chamber 2 is well known to those skilled in the art so as to prevent the microwaves out through said holes 19 and does not need to be described in more detail here.
  • the holes 19 of said at least one opening 10 of said at least one recess 6 of the bottom wall 4 of the cooking chamber 2 may be hexagonal, circular, and so on.
  • the shape of the holes 19 is in no way limiting and can be performed differently.
  • the hexagonal shape of the holes 19 of said at least one opening 10 of said at least one depression 6 of the bottom wall 4 of the cooking chamber 2 may make it possible to improve the light diffusion towards the plate 5 while being dimensioned with so as not to cause microwave leakage.
  • said at least one lighting device 9 comprises a printed circuit board 12, said printed circuit board 12 comprising at least one light-emitting diode 13, as illustrated in FIG. figure 1 .
  • said at least one lighting device 9 makes it possible to modify the color shade and / or the light intensity simply, inexpensively and in a wide range of colors and / or intensities.
  • the number of light-emitting diodes 13 can be between one and several. Each light-emitting diode 13 may be of the same or different color.
  • the number of light-emitting diodes 13 is in no way limiting.
  • said at least one lighting device 9 comprises at least one lens 16 between said at least one light-emitting diode 13 and the outer face 6a of said at least one depression 6 of the bottom wall 4 of the cooking chamber 2.
  • the light emitted by said at least one light-emitting diode 13 from at least one lighting device 9 is directed by said at least one lens 16 in the direction of the side wall 11 of the plate 5.
  • Said at least one lighting device 9 is disposed inside a housing 14 of the microwave cooking oven 1 and outside the cooking chamber 2.
  • the printed circuit board 12 of at least one lighting device 9 can be moved away from a heat source provided by a magnetron and possibly can be placed in a ventilation zone of the microwave oven 1 .
  • the printed circuit board 12 of said at least one lighting device 9 can be thermally protected.
  • Said at least one lighting device 9, as illustrated in FIG. figure 5 can include a housing 15 in which the printed circuit board 12 and said at least one light emitting diode 13 can be accommodated.
  • the plate 5 comprises a reflection surface on its lower face 5a for reflecting the light emitted by said at least one lighting device 9 towards the inside of the cooking chamber 2.
  • the plate 5 comprises on its underside 5a a reflection surface for reflecting the light emitted by said at least one lighting device 9 to the inside of the cooking chamber 2 and from bottom to top.
  • the reflecting surface of the plate 5 makes it possible to increase the brightness inside the cooking chamber 2 from the light emitted by the at least one lighting device 9 situated outside said cooking chamber. 2 and along an outer face 6a of said at least one depression 6 of the bottom wall 4 of said cooking chamber 2.
  • the reflection surface of the lower face 5a of the plate 5 is a dot matrix of a screen printing layer.
  • This reflecting surface of the plate 5 can be obtained by depositing a screen printing layer of white dots on the lower face 5a of the plate 5.
  • this screen printing layer in the form of a screen, can be precisely determined to obtain a homogeneous diffusion of the light inside the cooking chamber 2.
  • the distribution of this screen printing layer may be a function of the distance with said at least one light-emitting diode 13 from at least one lighting device 9.
  • This reflection surface on the lower face 5a of the plate 5 can extend under the entire surface of said lower face 5a of said plate 5 or partially.
  • the reflection surface of the lower face 5a of the plate 5 is obtained by creating asperities in said lower face 5a of said plate 5.
  • These asperities of the lower face 5a of the plate 5 may be of greater or lesser depth depending on the distance with said at least one light-emitting diode 13 from at least one lighting device 9.
  • the distribution of these asperities, in the form of wefts, can be determined precisely to obtain a homogeneous distribution of the light inside the cooking chamber 2.
  • This frame of asperities on the lower face 5a of the plate 5 may extend under the entire surface of said lower face 5a of said plate 5 or partially.
  • These asperities of the lower face 5a of the plate 5 can be obtained by a sanding process, by a laser etching process, or be provided in a mold for obtaining said plate 5.
  • the microwave oven 1 comprises three lighting devices 9 positioned equidistant from each other around the plate 5.
  • the three lighting devices 9 emit light at three points equidistantly around the plate 5 so that the light diffused inside thereof is evenly distributed.
  • the three lighting devices 9 thus make it possible to guarantee a level of luminous intensity in the cooking chamber 2 reliably and at the least cost.
  • Such a distribution of the light around the plate 5 by the three lighting devices 9 makes it possible to overcome the use of light guides having complex and expensive shapes.
  • the three lighting devices 9 are arranged around the depression 6 of the bottom wall 4 of the cooking chamber 2 with an angle ⁇ between each lighting device 9 of the order of 120 °.
  • the microwave oven 1 comprises two lighting devices 9 positioned around the plate 5. These two lighting devices 9 can be located diametrically opposite around the tray 5.
  • the number of lighting devices 9 may be one, two, three or more depending on the light intensity to be diffused through the plate 5 and the light scattering characteristics of the plate 5.
  • Each of the lighting devices 9 is disposed opposite at least one opening 10 of the at least one depression 6 of the bottom wall 4 of the cooking chamber 2.
  • Fixing the lighting devices 9 on the outer face 6a of the recess 6 of the bottom wall 4 of the cooking chamber 2 implements conventional fixing means, for example of the type by gluing, screwing, elastic snap-fastening . These fastening means are well known to those skilled in the art and do not need to be described in more detail here.
  • the printed circuit board 12 of each lighting device 9 is connected to a control unit (not shown) of the microwave oven 1, which can be for example an electronic control board, directly or not.
  • the printed circuit board 12 of each lighting device 9 is connected to the control unit of the microwave oven 1 by means of a flat cable 17, still called dab, so as to supply electrical energy to said at least one light-emitting diode 13 of said lighting device 9.
  • the printed circuit board 12 of each lighting device 9 can be connected to the control unit through a control card of a control keyboard 18, or , the printed circuit board 12 of each lighting device 9 can be connected to the control unit directly and the control board of the control keyboard 18 to the control unit.
  • the control unit of the microwave cooking oven 1 is adapted to adjust the power level of the wavechain.
  • the control unit comprises, in known manner, a microcontroller adapted to process the information from the control card, and thus to put into operation, extinguish or adjust the power level of the waveband, and therefore to controlling the illumination of said at least one light-emitting diode 13 of the printed circuit board 12 of said at least one lighting device 9 according to the control carried out by the user of the microwave oven 1.
  • the at least one lighting device 9 illuminates the inside of the cooking chamber 2 so as to indicate this command.
  • said at least one lighting device 9 can illuminate the interior of the cooking chamber 2 so that to indicate this operating state.
  • the color shade and / or light intensity of said at least one light emitting diode 13 may vary depending on the power level required by the user.
  • the light intensity can increase when the power demanded by the user increases.
  • the color shade may darken, for example from yellow to red, as the power demanded by the user increases.
  • the color shade can change, for example from yellow to red, when the power level requested by the user increases, and conversely when the power level requested by the user decreases.
  • This change in color shade can be achieved with light-emitting diodes 13 of different colors lighting one after the other.
  • the light intensity can increase when the power level requested by the user increases, and conversely when the power level requested by the user decreases.
  • This change in light intensity can be achieved with light-emitting diodes 13 of identical color, for example red, switching on or off one after the other, or, switching on or off simultaneously and changing the voltage therethrough.
  • the cooking chamber 2 comprises a dome-shaped wall 3 positioned above a bottom wall 4 so as to define a cooking space.
  • the useful volume of the cooking chamber 2 is reduced so as to limit the areas of said cooking chamber 2 unnecessary during heating of a food to be heated on a plate 5.
  • the dome-shaped wall 3 of the cooking chamber 2 is made of a material adapted to diffuse light towards the outside of the microwave oven 1.
  • the dome-shaped wall 3 of the cooking chamber 2 is made of a material that does not absorb the microwaves to avoid heating thereof and that is transparent to allow the user to view the interior of the room. the cooking chamber 2.
  • the dome-shaped wall 3 of the cooking chamber 2 may be made for example of glass, or of plastics material such as polycarbonate or polymethacrylate.
  • the light emitted by at least one lighting device 9 is diffused inside the cooking chamber 2 through the plate 5 and then outside the cooking chamber 2 through the wall. dome shape 3.
  • the user can view the light emitted inside the cooking chamber 2 while being away from the microwave oven 1 and without remaining in front of it during its operation.
  • Such a microwave oven 1 overcomes the disadvantage of current microwave cooking ovens where the user does not know the operating state of these interactively through audit at least one lighting device 9 diffusing light outside said microwave cooking oven 1 through the dome-shaped wall 3.
  • the dome-shaped wall 3 of the cooking chamber 2 encloses a wave trap.
  • the microwaves circulating inside the cooking chamber 2 can not leak outside the microwave oven 1.
  • the dome-shaped wall 3 of the cooking chamber 2 shown in FIGS. Figures 7 and 8 represents the wave trap and the transparent material positioned around said wave trap. This transparent material makes it possible to diffuse the light outside the cooking chamber 2 as well as to protect the wave trap from the projections associated with the heating. food.
  • the microwave oven 1 may comprise at least one additional lighting device 20.
  • said at least one additional lighting device 20 makes it possible to combine the light emitted by the latter with that of at least one lighting device 9 so as to increase the brightness in the cooking chamber 2.
  • said at least one additional lighting device 20 is located at the top of the dome-shaped wall 3 of the cooking chamber 2 so as to diffuse light from top to bottom in said cooking chamber 2.
  • an article to be heated placed on the plate 5 inside the cooking chamber 2 is illuminated from the bottom upwards by at least one lighting device 9 through said plate 5 and from the top to the bottom by at least one additional lighting device 20 located in the upper part of said cooking chamber 2.
  • Said at least one lighting device 9 and said at least one additional lighting device 20 can be operated simultaneously or independently, for example depending on the operating state of the microwave oven 1 or the command given by the user to a control unit.
  • Said at least one lighting device 9 and said at least one additional lighting device 20 may be adapted to emit light of the same or different color.
  • said at least one additional lighting device 20 comprises a printed circuit board 21, said printed circuit board 21 comprising at least one light-emitting diode 22, as illustrated in FIG. figure 8 .
  • said at least one additional lighting device 20 makes it possible to modify the color shade and / or the light intensity simply, inexpensively and in a wide range of colors and / or intensities.
  • the number of light-emitting diodes 22 may be between one and more. Each light-emitting diode 22 may be of the same or different color.
  • the number of light-emitting diodes 22 is in no way limiting.
  • said at least one additional lighting device 20 comprises at least one lens 23 between said at least one light-emitting diode 22 and a wall 24 of a housing 25 of the dome-shaped wall 3 of the cooking chamber 2 .
  • the light emitted by said at least one light-emitting diode 22 from at least one additional lighting device 20 is directed by said at least one lens 23 towards the interior of the cooking chamber 2.
  • said at least one lens 23 makes it possible to protect said at least one light-emitting diode 22 from at least one additional lighting device 20.
  • Said at least one additional lighting device 20 is disposed inside a housing 25 outside the cooking chamber 2.
  • the wall 24 of the housing 25 of the dome-shaped wall 3 of the cooking chamber 2 comprises at least one opening 29 allowing the passage of the light emitted by the at least one additional lighting device 20 towards the interior of the said cooking chamber 2.
  • Said at least one opening 29 of the wall 24 of the housing 25 of the dome-shaped wall 3 of the cooking chamber 2 comprises a plurality of holes 30.
  • the holes 30 of said at least one opening 29 formed in the wall 24 of the housing 25 of the dome-shaped wall 3 of the cooking chamber 2 allow the light emitted by said at least one additional lighting device. 20 to be diffused towards the inside of the cooking chamber 2 and are dimensioned so as to prevent the microwaves from leaving through said holes 30.
  • the microwave oven 1 thus has the minimum of microwave leakage outside the cooking chamber 2.
  • the dimensioning of the holes 30 of said at least one opening 29 formed in the wall 24 of the housing 25 of the dome-shaped wall 3 of the cooking chamber 2 is well known to those skilled in the art so as to prevent the micro -ondes to exit through said holes 30 and need not be described in more detail here.
  • the holes 30 of said at least one opening 29 of the wall 24 of the housing 25 of the dome-shaped wall 3 of the cooking chamber 2 may be hexagonal, circular, and so on.
  • the shape of the holes 30 is in no way limiting and can be performed differently.
  • the hexagonal shape of the holes 30 of said at least one opening 29 formed in the wall 24 of the housing 25 of the dome-shaped wall 3 of the cooking chamber 2 may make it possible to improve the light diffusion in the direction of the inside the cooking chamber 2 while being dimensioned so as not to cause microwave leakage.
  • Fixing said at least one additional lighting device 20 in the housing 25 implements conventional fastening means, for example of the type by gluing, screwing, snap elastic. These attachment means are well known to those skilled in the art and do not need to be described in more detail here.
  • Said at least one additional lighting device 20, as illustrated in FIG. figure 8 may comprise a housing (not shown) in which the printed circuit board 21 and said at least one light emitting diode 22 can be accommodated.
  • the printed circuit board 21 of said at least one additional lighting device 20 is connected to the control unit of the microwave cooking oven 1 by means of a flat cable (not shown), still called dab, of so as to supply electrical energy to said at least one light-emitting diode 22 of said at least one additional lighting device 20.
  • the printed circuit board 21 of said at least one additional lighting device 20 is connected to a control unit (not shown) of the microwave oven 1, which may be for example an electronic control board, directly or otherwise. .
  • Said at least one additional lighting device 20 is supplied with electrical energy by means of an electrical connection passing through a hinge 26 connecting the bottom wall 4 of the cooking chamber 2 to the dome-shaped wall 3 of said cooking chamber 2.
  • the cooking chamber 2 comprises a hinge arm 27 connecting the dome-shaped wall 3 to the bottom wall 4, and said hinge arm 27 comprising a passage housing 28 of a wired power supply connection of said at least one additional lighting device 20.
  • the cooking chamber can be housed in a body and include an opening on the end face closed by a door.
  • the door is made of a material adapted to diffuse light to the outside of the microwave oven, such as for example transparent plastic material or glass.
  • the light emitted by at least one lighting device is diffused inside the cooking chamber through the plate and then outside the cooking chamber through the door.
  • the cooking chamber comprises at least one bottom wall, also called sole.
  • the cooking chamber may also comprise an upper wall, also called a vault, and side walls.
  • the walls of the cooking chamber are used to define a cavity for heating or cooking food.

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  • Electromagnetism (AREA)
  • Electric Ovens (AREA)

Abstract

The oven has a lighting device (9) located at the exterior of a cooking enclosure and along an external surface (6a) of a tooth (6) of a lower wall (4) of the enclosure. The tooth has an opening (10) for passing the light emitted by the lighting device towards the interior of the enclosure. A glass plate (5) has a lateral wall (11) placed opposite to the opening of the tooth for diffusing the light towards the plate. The plate is housed in the tooth of the lower wall.

Description

La présente invention concerne un four de cuisson à micro-ondes équipé d'au moins un dispositif d'éclairage diffusant de la lumière au travers d'un plateau dans une enceinte de cuisson.The present invention relates to a microwave oven equipped with at least one lighting device diffusing light through a tray in a cooking chamber.

Elle concerne de manière générale les fours de cuisson à micro-ondes domestiques comprenant un dispositif d'éclairage de l'intérieur d'une enceinte de cuisson.It generally relates to domestic microwave cooking ovens including a lighting device of the interior of a cooking chamber.

Traditionnellement, les fours de cuisson à micro-ondes sont munis d'un dispositif d'éclairage monté sur une paroi latérale de l'enceinte de cuisson. Ce dispositif d'éclairage comprend un support dans lequel est monté une lampe et ledit support est fixé sur une paroi latérale de l'enceinte de cuisson, notamment par encliquetage élastique. Le dispositif d'éclairage comprend également une verrine montée sur le support de sorte à fermer un logement contenant la lampe. La verrine du dispositif d'éclairage est dirigée vers l'intérieur de l'enceinte de cuisson de sorte à diffuser de la lumière à l'intérieur de celle-ci.Traditionally, microwave ovens are provided with a lighting device mounted on a side wall of the cooking chamber. This lighting device comprises a support in which is mounted a lamp and said support is fixed on a side wall of the cooking chamber, in particular by resilient snapping. The lighting device also includes a glass mounted on the support so as to close a housing containing the lamp. The verrine of the lighting device is directed towards the interior of the cooking chamber so as to diffuse light inside it.

Cependant, ces fours de cuisson à micro-ondes présentent l'inconvénient de diffuser la lumière de manière non uniforme puisque le dispositif d'éclairage est situé sur une paroi latérale de l'enceinte de cuisson.However, these microwave ovens have the disadvantage of diffusing the light non-uniformly since the lighting device is located on a side wall of the cooking chamber.

En outre, l'article à chauffer posé dans l'enceinte de cuisson empêche la lumière émise par un dispositif d'éclairage depuis une paroi latérale de l'enceinte de cuisson de se diffuser de manière optimale vers la paroi latérale opposée de ladite enceinte de cuisson.In addition, the article to be heated placed in the cooking chamber prevents the light emitted by a lighting device from a side wall of the cooking chamber from diffusing optimally towards the opposite side wall of said enclosure. cooking.

On connaît également un document GB 2 353 897 A qui décrit un four à micro-ondes comprenant une chambre de cuisson, un plateau tournant installé dans la paroi inférieure de la chambre de cuisson, une unité de génération de micro-ondes et un élément en maille, des trous hexagonaux étant formés dans l'élément en maille en forme de nid d'abeille de sorte à améliorer la coupure des pertes micro-ondes et agrandir une surface d'ouverture permettant la diffusion de chaleur d'une source de chaleur ou de lumière d'une source de lumière vers l'intérieur de la chambre de cuisson.A document is also known GB 2 353 897 A which discloses a microwave oven comprising a cooking chamber, a turntable installed in the bottom wall of the cooking chamber, a microwave generation unit and a mesh member, hexagonal holes being formed in the honeycomb mesh element so as to improve the cut-off of microwave losses and to enlarge an opening surface for the diffusion of heat from a source of heat or light from a light source to the inside the cooking chamber.

La présente invention a pour but de résoudre les inconvénients précités et de proposer un four de cuisson à micro-ondes permettant d'illuminer une enceinte de cuisson de manière uniforme et tout autour d'un article à chauffer posé dans l'enceinte de cuisson.The present invention aims to solve the aforementioned drawbacks and to provide a microwave oven for illuminating a cooking chamber uniformly and around an article to be heated placed in the cooking chamber.

A cet effet, la présente invention vise un four de cuisson à micro-ondes comprenant une enceinte de cuisson, ladite enceinte de cuisson comprenant au moins une paroi inférieure, ladite enceinte de cuisson comprenant un plateau logé dans au moins un enfoncement de ladite paroi inférieure, ledit four de cuisson à micro-ondes comprenant également au moins un dispositif d'éclairage situé à l'extérieur de ladite enceinte de cuisson.For this purpose, the present invention provides a microwave cooking oven comprising a cooking chamber, said cooking chamber comprising at least one bottom wall, said cooking chamber comprising a plate housed in at least one depression of said bottom wall. said microwave cooking oven also comprising at least one lighting device located outside said cooking chamber.

Selon l'invention,

  • ledit au moins un dispositif d'éclairage est également situé le long d'une face extérieure dudit au moins un enfoncement de ladite paroi inférieure de ladite enceinte de cuisson ;
  • ledit au moins un enfoncement de ladite paroi inférieure de ladite enceinte de cuisson comprend au moins une ouverture permettant le passage de la lumière émise par ledit au moins un dispositif d'éclairage vers l'intérieur de ladite enceinte de cuisson ; et
  • ledit plateau comprend au moins une paroi latérale placée en vis-à-vis de ladite au moins une ouverture dudit au moins un enfoncement de ladite paroi inférieure de ladite enceinte de cuisson de sorte à diffuser la lumière au travers dudit plateau.
According to the invention,
  • said at least one lighting device is also located along an outer face of said at least one depression of said bottom wall of said cooking chamber;
  • said at least one depression of said bottom wall of said cooking chamber comprises at least one opening allowing the passage of light emitted by said at least one lighting device to the interior of said cooking chamber; and
  • said plate comprises at least one side wall placed opposite said at least one opening of said at least one depression of said bottom wall of said cooking chamber so as to diffuse the light through said plate.

Ainsi, ledit au moins un dispositif d'éclairage dudit four de cuisson à micro-ondes permet d'illuminer une enceinte de cuisson de manière uniforme et tout autour d'un article à chauffer posé sur le plateau.Thus, said at least one lighting device of said microwave oven is used to illuminate a cooking chamber uniformly and around a heating article placed on the tray.

Le plateau permet de diffuser la lumière en partie inférieure de l'enceinte de cuisson selon un plan horizontal et de réfléchir la lumière de bas en haut dans l'enceinte de cuisson.The plate makes it possible to diffuse the light in the lower part of the cooking chamber in a horizontal plane and to reflect the light from bottom to top in the cooking chamber.

De cette manière, l'enceinte de cuisson est éclairée de manière uniforme par ledit au moins un dispositif d'éclairage et sans créer de zones d'ombres dans une partie de l'enceinte de cuisson liée à l'encombrement occupé par un article à chauffer posé sur le plateau.In this way, the cooking chamber is uniformly illuminated by the at least one lighting device and without creating shadows in a part of the cooking chamber related to the space occupied by an article to heat on the tray.

En outre, ledit au moins un dispositif d'éclairage situé à l'extérieur de l'enceinte de cuisson et le long d'une face extérieure dudit au moins un enfoncement de la paroi inférieure de l'enceinte de cuisson est masqué par le plateau puisque ladite au moins une ouverture dudit au moins un enfoncement de la paroi inférieure de l'enceinte de cuisson est située en vis-à-vis d'une paroi latérale du plateau.In addition, said at least one lighting device located outside the cooking chamber and along an outer face of said at least one depression of the bottom wall of the cooking chamber is hidden by the tray since said at least one opening of said at least one depression of the bottom wall of the cooking chamber is located opposite a side wall of the tray.

Ledit au moins un dispositif d'éclairage diffusant de la lumière au travers du plateau peut permettre de simuler la fonction de chauffage d'un élément chauffant électrique de sole, en éclairant par une lumière de couleur rouge par exemple, depuis le bas vers le haut dans l'enceinte de cuisson de sorte à informer l'utilisateur du cycle de chauffage de l'article à chauffer posé dans l'enceinte de cuisson.Said at least one lighting device diffusing light through the plate can simulate the heating function of an electric hearth heating element, illuminating with a red light for example, from the bottom to the top in the cooking chamber so as to inform the user of the heating cycle of the article to be heated placed in the cooking chamber.

Par ailleurs, ledit au moins un dispositif d'éclairage diffusant de la lumière au travers du plateau puis à l'intérieur de l'enceinte de cuisson peut permettre de visualiser un état de fonctionnement du four de cuisson à micro-ondes en fonction de la nuance de couleur de la lumière émise et/ou de l'intensité de la lumière émise et/ou du mode de fonctionnement en continu et/ou par alternance dudit au moins un dispositif d'éclairage.Moreover, said at least one lighting device diffusing light through the plate and then inside the cooking chamber can make it possible to visualize a state of operation of the microwave oven according to the color shade of the light emitted and / or the intensity of the light emitted and / or the mode of continuous operation and / or alternating said at least one lighting device.

De cette manière, l'utilisateur peut surveiller l'état de fonctionnement du four de cuisson à micro-ondes en étant à distance ou à proximité sans avoir à lire les informations indiquées par un afficheur.In this way, the user can monitor the operating status of the oven of microwave cooking while being remote or close without having to read the information indicated by a display.

Une telle disposition dudit au moins un dispositif d'éclairage permet d'améliorer l'esthétique d'un four de cuisson à micro-ondes et d'éviter un éblouissement de l'utilisateur par ledit au moins un dispositif d'éclairage lors du chargement et du déchargement de l'enceinte de cuisson.Such an arrangement of said at least one lighting device makes it possible to improve the aesthetics of a microwave oven and to avoid glare for the user by said at least one lighting device during loading. and unloading the cooking chamber.

Selon une caractéristique préférée de l'invention, ledit four de cuisson à micro-ondes comprend trois dispositifs d'éclairage positionnés à équidistance les uns des autres autour dudit plateau.According to a preferred feature of the invention, said microwave cooking oven comprises three lighting devices positioned equidistant from each other around said plate.

Ainsi, les trois dispositifs d'éclairage émettent de la lumière en trois points à égale distance autour du plateau de sorte que la lumière diffusée à l'intérieur de celui-ci soit répartie uniformément.Thus, the three lighting devices emit light at three points equidistantly around the tray so that light scattered therein is evenly distributed.

Les trois dispositifs d'éclairage permettent ainsi de garantir un niveau d'intensité lumineuse dans l'enceinte de cuisson de manière fiable et au moindre coût. Une telle répartition de la lumière autour du plateau par les trois dispositifs d'éclairage permet de s'affranchir de l'utilisation de guides de lumière ayant des formes complexes et coûteuses.The three lighting devices thus make it possible to guarantee a level of luminous intensity in the cooking chamber reliably and at the least cost. Such a distribution of light around the plate by the three lighting devices eliminates the use of light guides having complex shapes and expensive.

D'autres particularités et avantages de l'invention apparaîtront encore dans la description ci-après.Other features and advantages of the invention will become apparent in the description below.

Aux dessins annexés, donnés à titre d'exemples non limitatifs :

  • la figure 1 est une vue en coupe partielle d'une enceinte de cuisson, d'un plateau et d'un dispositif d'éclairage selon un mode de réalisation de l'invention ;
  • la figure 2 est une vue de dessous d'une paroi inférieure d'une enceinte de cuisson équipée de trois dispositifs d'éclairage selon un mode de réalisation de l'invention ;
  • la figure 3 est une vue en perspective de dessous d'une paroi inférieure d'une enceinte de cuisson équipée de trois dispositifs d'éclairage selon un mode de réalisation de l'invention ;
  • la figure 4 est une vue en perspective de dessus d'une paroi inférieure d'une enceinte de cuisson équipée de trois dispositifs d'éclairage selon un mode de réalisation de l'invention ;
  • la figure 5 est une vue d'un dispositif d'éclairage conforme à l'invention ;
  • la figure 6 est une vue en perspective de trois dispositifs d'éclairage positionnés autour d'une paroi inférieure d'une enceinte de cuisson selon un mode de réalisation de l'invention, la paroi inférieure de l'enceinte de cuisson ayant été ôtée ;
  • la figure 7 est une vue en coupe d'un four de cuisson à micro-ondes comprenant au moins un dispositif d'éclairage situé à l'extérieur d'une enceinte de cuisson et le long d'une face extérieure dudit au moins un enfoncement d'une paroi inférieure de ladite enceinte de cuisson et au moins un dispositif d'éclairage additionnel selon un mode de réalisation de l'invention ; et
  • la figure 8 est une vue de détail A de la figure 7.
In the accompanying drawings, given as non-limiting examples:
  • the figure 1 is a partial sectional view of a cooking chamber, a tray and a lighting device according to one embodiment of the invention;
  • the figure 2 is a bottom view of a bottom wall of a cooking chamber equipped with three lighting devices according to one embodiment of the invention;
  • the figure 3 is a bottom perspective view of a bottom wall of a cooking chamber equipped with three lighting devices according to one embodiment of the invention;
  • the figure 4 is a perspective view from above of a bottom wall of a cooking chamber equipped with three lighting devices according to one embodiment of the invention;
  • the figure 5 is a view of a lighting device according to the invention;
  • the figure 6 is a perspective view of three lighting devices positioned around a bottom wall of a cooking chamber according to one embodiment of the invention, the lower wall of the cooking chamber having been removed;
  • the figure 7 is a sectional view of a microwave cooking oven comprising at least one lighting device located outside a cooking chamber and along an outer face of said at least one recess of a lower wall of said cooking chamber and at least one additional lighting device according to one embodiment of the invention; and
  • the figure 8 is a detail view A of the figure 7 .

On va décrire, en référence aux figures 1 à 8, un four de cuisson à micro-ondes adapté à mettre en oeuvre la présente invention.We will describe, with reference to Figures 1 to 8 , a microwave cooking oven adapted to implement the present invention.

Un four de cuisson à micro-ondes 1 comprend une enceinte de cuisson 2. L'enceinte de cuisson 2 comprend au moins une paroi inférieure 4.A microwave oven 1 comprises a cooking chamber 2. The cooking chamber 2 comprises at least one bottom wall 4.

Afin d'alimenter en énergie haute fréquence l'enceinte de cuisson 2 d'un four de cuisson à micro-ondes 1, il est prévu de manière classique un magnétron, dont une antenne débouche dans un guide d'ondes formé contre une paroi de l'enceinte de cuisson 2.In order to supply high frequency energy to the cooking chamber 2 of a microwave cooking oven 1, a magnetron is conventionally provided, of which an antenna opens into a waveguide formed against a wall of the cooking chamber 2.

Le four de cuisson à micro-ondes 1 peut également comprendre un ou plusieurs éléments chauffants, notamment des éléments chauffants radiants du type résistances électriques. La présence de cet ou ces éléments chauffants dans le four de cuisson à micro-ondes 1 permet ainsi d'ajouter une fonction de cuisson traditionnelle.The microwave oven 1 may also include one or more heating elements, including radiant heating elements of the electric heater type. The presence of this or these heating elements in the microwave oven 1 thus allows to add a traditional cooking function.

On notera aussi que les figures sont schématiques et que de nombreux organes nécessaires au fonctionnement du four de cuisson à micro-ondes, par exemple les moyens de chauffage, les moyens de ventilation, ... ont été omis et n'ont pas besoin d'être décrits en détail ici.Note also that the figures are diagrammatic and that many organs necessary for the operation of the microwave oven, for example the heating means, the ventilation means, ... have been omitted and do not need to to be described in detail here.

L'enceinte de cuisson 2 comprend un plateau 5 logé dans au moins un enfoncement 6 de la paroi inférieure 4.The cooking chamber 2 comprises a plate 5 housed in at least one recess 6 of the bottom wall 4.

Le plateau 5 peut être un plateau tournant monté en rotation sur un axe 7 entraîné par un moteur 8 ou encore un encore plateau fixe installé dans ledit au moins un enfoncement 6 de la paroi inférieure 4.The plate 5 can be a turntable rotatably mounted on an axis 7 driven by a motor 8 or a still fixed plate installed in said at least one recess 6 of the bottom wall 4.

Le four de cuisson à micro-ondes 1 comprend au moins un dispositif d'éclairage 9 situé à l'extérieur de l'enceinte de cuisson 2 et le long d'une face extérieure 6a dudit au moins un enfoncement 6 de la paroi inférieure 4 de l'enceinte de cuisson 2.The microwave oven 1 comprises at least one lighting device 9 located outside the cooking chamber 2 and along an outer face 6a of the at least one recess 6 of the bottom wall 4 of the cooking chamber 2.

Ledit au moins un enfoncement 6 de la paroi inférieure 4 de l'enceinte de cuisson 2 comprend au moins une ouverture 10 permettant le passage de la lumière émise par ledit au moins un dispositif d'éclairage 9 vers l'intérieur de ladite enceinte de cuisson 2.Said at least one depression 6 of the bottom wall 4 of the cooking chamber 2 comprises at least one opening 10 allowing the passage of the light emitted by said at least one lighting device 9 towards the interior of said cooking chamber 2.

Le plateau 5 comprend au moins une paroi latérale 11 placée en vis-à-vis de ladite au moins une ouverture 10 dudit au moins un enfoncement 6 de la paroi inférieure 4 de l'enceinte de cuisson 2 de sorte à diffuser la lumière au travers dudit plateau 5.The plate 5 comprises at least one side wall 11 placed opposite said at least one opening 10 of said at least one depression 6 of the bottom wall 4 of the cooking chamber 2 so as to diffuse light through said plateau 5.

Ainsi, ledit au moins un dispositif d'éclairage 9 du four de cuisson à micro-ondes 1 permet d'illuminer une enceinte de cuisson 2 de manière uniforme et tout autour d'un article à chauffer posé sur le plateau 5.Thus, said at least one lighting device 9 of the microwave cooking oven 1 makes it possible to illuminate a cooking chamber 2 in a uniform manner and all around an article to be heated placed on the plate 5.

Le plateau 5 permet de diffuser la lumière en partie inférieure de l'enceinte de cuisson 2 selon un plan horizontal et de réfléchir la lumière de bas en haut dans l'enceinte de cuisson 2.The plate 5 makes it possible to diffuse the light in the lower part of the cooking chamber 2 along a horizontal plane and to reflect the light from bottom to top in the cooking chamber 2.

De cette manière, l'enceinte de cuisson 2 est éclairée de manière uniforme par ledit au moins un dispositif d'éclairage 9 et sans créer de zones d'ombres dans une partie de l'enceinte de cuisson 2 liée à l'encombrement occupé par un article à chauffer posé sur le plateau 5.In this way, the cooking chamber 2 is uniformly illuminated by said at least one lighting device 9 and without creating shadows in a portion of the cooking chamber 2 related to the space occupied by an article to be heated placed on the plate 5.

Le plateau 5 sert de guide de lumière à la lumière émise par ledit au moins un dispositif d'éclairage 9 situé à l'extérieur de l'enceinte de cuisson 2 et le long d'une face extérieure 6a dudit au moins un enfoncement 6 de la paroi inférieure 4 de l'enceinte de cuisson 2.The plate 5 serves as a light guide to the light emitted by said at least one lighting device 9 located outside the cooking chamber 2 and along an outer face 6a of said at least one recess 6 of the bottom wall 4 of the cooking chamber 2.

En outre, ledit au moins un dispositif d'éclairage 9 situé à l'extérieur de l'enceinte de cuisson 2 et le long d'une face extérieure 6a dudit au moins un enfoncement 6 de la paroi inférieure 4 de l'enceinte de cuisson 2 est masqué par le plateau 5 puisque ladite au moins une ouverture 10 dudit au moins un enfoncement 6 de la paroi inférieure 4 de l'enceinte de cuisson 2 est située en vis-à-vis d'une paroi latérale 11 du plateau 5.In addition, said at least one lighting device 9 located outside the cooking chamber 2 and along an outer face 6a of said at least one depression 6 of the bottom wall 4 of the cooking chamber 2 is hidden by the plate 5 since said at least one opening 10 of said at least one depression 6 of the bottom wall 4 of the cooking chamber 2 is located opposite a side wall 11 of the plate 5.

Ledit au moins un dispositif d'éclairage 9 diffusant de la lumière au travers du plateau 5 peut permettre de simuler la fonction de chauffage d'un élément chauffant électrique de sole, en éclairant par une lumière de couleur rouge par exemple, depuis le bas vers le haut dans l'enceinte de cuisson 2 de sorte à informer l'utilisateur du cycle de chauffage de l'article à chauffer posé dans l'enceinte de cuisson 2.Said at least one lighting device 9 diffusing light through the plate 5 can be used to simulate the heating function of an electric sole heating element, by illuminating with a red light, for example, from the bottom towards the top in the cooking chamber 2 so as to inform the user of the heating cycle of the article to be heated placed in the cooking chamber 2.

Par ailleurs, ledit au moins un dispositif d'éclairage 9 diffusant de la lumière au travers du plateau 5 puis à l'intérieur de l'enceinte de cuisson 2 peut permettre de visualiser un état de fonctionnement du four de cuisson à micro-ondes 1 en fonction de la nuance de couleur de la lumière émise et/ou de l'intensité de la lumière émise et/ou du mode de fonctionnement en continu et/ou par alternance dudit au moins un dispositif d'éclairage 9.Moreover, said at least one lighting device 9 diffusing light through the plate 5 and then inside the cooking chamber 2 can make it possible to visualize an operating state of the microwave cooking oven 1 according to the color shade of the light emitted and / or the intensity of the light emitted and / or the mode of continuous operation and / or alternating said at least one lighting device 9.

De cette manière, l'utilisateur peut surveiller l'état de fonctionnement du four de cuisson à micro-ondes 1 en étant à distance ou à proximité sans avoir à lire les informations indiquées par un afficheur.In this way, the user can monitor the operating state of the microwave cooking oven 1 by being remote or close without having to read the information indicated by a display.

Dans un mode de réalisation de l'invention, ledit au moins un dispositif d'éclairage 9 peut être adapté à émettre :

  • une lumière de couleur blanche lors de la mise en fonctionnement du four de cuisson à micro-ondes 1 ;
  • une lumière de couleur rouge de manière continue lors de la mise en oeuvre d'un cycle de chauffage d'un article à chauffer par le four de cuisson à micro-ondes 1 ;
  • une lumière de couleur rouge par intermittence lorsque le cycle de chauffage d'un article à chauffer par le four de cuisson à micro-ondes 1 est terminé ;
  • une lumière de couleur orange de manière continue lorsque des moyens de commande du four de cuisson à micro-ondes 1, tel que par exemple un microcontrôleur, recommandent d'attendre une durée prédéterminée avant de retirer l'aliment placé dans l'enceinte de cuisson 2 de sorte que la température s'homogénéise à l'intérieur dudit aliment ;
  • une lumière de couleur orange par intermittence lorsque des moyens de commande du four de cuisson à micro-ondes 1, tel que par exemple un microcontrôleur, démarrent un cycle de maintien au chaud dans le cas où l'utilisateur n'a pas retiré l'aliment chauffé suite à un cycle de chauffage au bout d'une période prédéterminée ; et/ou
  • une lumière de couleur bleue lors du passage du four de cuisson à micro-ondes 1 d'un mode veille à un mode de mise fonctionnement prêt à démarrer un cycle de chauffage.
In one embodiment of the invention, said at least one lighting device 9 can be adapted to emit:
  • a white light when operating the microwave oven 1;
  • a continuous red light when performing a heating cycle of an article to be heated by the microwave cooking oven 1;
  • a red color light intermittently when the heating cycle of an article to be heated by the microwave oven 1 is completed;
  • an orange light in a continuous manner when control means of the microwave oven 1, such as for example a microcontroller, recommend waiting a predetermined time before removing the food placed in the cooking chamber 2 so that the temperature is homogenized inside said food;
  • an orange light intermittently when control means of the microwave oven 1, such as for example a microcontroller, start a warm-up cycle in the case where the user has not removed the food heated following a heating cycle after a predetermined period; and or
  • a light of blue color during the passage of the microwave oven 1 from a standby mode to an operating mode ready to start a heating cycle.

Une telle disposition dudit au moins un dispositif d'éclairage 9 permet d'améliorer l'esthétique d'un four de cuisson à micro-ondes 1 et d'éviter un éblouissement de l'utilisateur par ledit au moins un dispositif d'éclairage 9 lors du chargement et du déchargement de l'enceinte de cuisson 2.Such an arrangement of said at least one lighting device 9 makes it possible to improve the aesthetics of a microwave cooking oven 1 and to avoid glare for the user by said at least one lighting device 9 when loading and unloading the cooking chamber 2.

Dans le mode de réalisation de invention illustré aux figures 1 à 8, le plateau 5 est de forme circulaire et est adapté à s'insérer dans un enfoncement 6 de la paroi inférieure 4 de l'enceinte de cuisson 2 également de forme circulaire.In the embodiment of the invention illustrated in Figures 1 to 8 , the plate 5 is of circular shape and is adapted to be inserted into a recess 6 of the lower wall 4 of the cooking chamber 2 also of circular shape.

Le plateau 5 est réalisé dans un matériau adapté à diffuser la lumière, et en particulier en verre.The plate 5 is made of a material adapted to diffuse light, and in particular glass.

Ladite au moins une ouverture 10 dudit au moins un enfoncement 6 de la paroi inférieure 4 de l'enceinte de cuisson 2 comprend une pluralité de trous 19.Said at least one opening 10 of said at least one recess 6 of the bottom wall 4 of the cooking chamber 2 comprises a plurality of holes 19.

Ainsi, les trous 19 de ladite au moins une ouverture 10 ménagés dans ledit au moins un enfoncement 6 de la paroi inférieure 4 de l'enceinte de cuisson 2 permettent à la lumière émise par ledit au moins un dispositif d'éclairage 9 d'être diffusée en direction du plateau 5 et sont dimensionnés de sorte à empêcher les micro-ondes de sortir par lesdits trous 19. Le four de cuisson à micro-ondes 1 présente ainsi le minimum de fuites de micro-ondes à l'extérieur de l'enceinte de cuisson 2.Thus, the holes 19 of said at least one opening 10 formed in said at least one recess 6 of the bottom wall 4 of the cooking chamber 2 allow the light emitted by said at least one lighting device 9 to be diffused towards the plate 5 and are dimensioned so as to prevent the microwaves out through said holes 19. The microwave oven 1 thus has the minimum of microwave leakage outside the oven. cooking chamber 2.

Le dimensionnement des trous 19 de ladite au moins une ouverture 10 ménagés dans ledit au moins un enfoncement 6 de la paroi inférieure 4 de l'enceinte de cuisson 2 est bien connu de l'homme du métier de sorte à empêcher les micro-ondes de sortir par lesdits trous 19 et n'a pas besoin d'être décrit plus en détail ici.The sizing of the holes 19 of said at least one opening 10 formed in said at least one depression 6 of the bottom wall 4 of the cooking chamber 2 is well known to those skilled in the art so as to prevent the microwaves out through said holes 19 and does not need to be described in more detail here.

Les trous 19 de ladite au moins une ouverture 10 dudit au moins un enfoncement 6 de la paroi inférieure 4 de l'enceinte de cuisson 2 peuvent être de forme hexagonale, circulaire, etc.The holes 19 of said at least one opening 10 of said at least one recess 6 of the bottom wall 4 of the cooking chamber 2 may be hexagonal, circular, and so on.

Bien entendu, la forme des trous 19 n'est nullement limitative et peut être réalisée de manière différente.Of course, the shape of the holes 19 is in no way limiting and can be performed differently.

La forme hexagonale des trous 19 de ladite au moins une ouverture 10 dudit au moins un enfoncement 6 de la paroi inférieure 4 de l'enceinte de cuisson 2 peut permettre d'améliorer la diffusion de lumière en direction du plateau 5 tout en étant dimensionnés de sorte à ne pas provoquer de fuites micro-ondes.The hexagonal shape of the holes 19 of said at least one opening 10 of said at least one depression 6 of the bottom wall 4 of the cooking chamber 2 may make it possible to improve the light diffusion towards the plate 5 while being dimensioned with so as not to cause microwave leakage.

Pratiquement, ledit au moins un dispositif d'éclairage 9 comprend une plaquette de circuit imprimé 12, ladite plaquette de circuit imprimé 12 comprenant au moins une diode électroluminescente 13, tel qu'illustré à la figure 1.In practice, said at least one lighting device 9 comprises a printed circuit board 12, said printed circuit board 12 comprising at least one light-emitting diode 13, as illustrated in FIG. figure 1 .

Ainsi, ledit au moins un dispositif d'éclairage 9 permet de modifier la nuance de couleur et/ou l'intensité lumineuse de manière simple, peu onéreuse et dans une large plage de couleur et/ou d'intensité.Thus, said at least one lighting device 9 makes it possible to modify the color shade and / or the light intensity simply, inexpensively and in a wide range of colors and / or intensities.

Le nombre de diodes électroluminescentes 13 peut être compris entre une et plusieurs. Chaque diode électroluminescente 13 peut être d'une couleur identique ou différente.The number of light-emitting diodes 13 can be between one and several. Each light-emitting diode 13 may be of the same or different color.

Bien entendu, le nombre de diodes électroluminescentes 13 n'est nullement limitatif.Of course, the number of light-emitting diodes 13 is in no way limiting.

Avantageusement, ledit au moins un dispositif d'éclairage 9 comprend au moins une lentille 16 entre ladite au moins une diode électroluminescente 13 et la face extérieure 6a dudit au moins un enfoncement 6 de la paroi inférieure 4 de l'enceinte de cuisson 2.Advantageously, said at least one lighting device 9 comprises at least one lens 16 between said at least one light-emitting diode 13 and the outer face 6a of said at least one depression 6 of the bottom wall 4 of the cooking chamber 2.

Ainsi, la lumière émise par ladite au moins une diode électroluminescente 13 d'au moins un dispositif d'éclairage 9 est dirigée par ladite au moins une lentille 16 en direction de la paroi latérale 11 du plateau 5.Thus, the light emitted by said at least one light-emitting diode 13 from at least one lighting device 9 is directed by said at least one lens 16 in the direction of the side wall 11 of the plate 5.

Ledit au moins un dispositif d'éclairage 9 est disposé à l'intérieur d'un carter 14 du four de cuisson à micro-ondes 1 et à l'extérieur de l'enceinte de cuisson 2.Said at least one lighting device 9 is disposed inside a housing 14 of the microwave cooking oven 1 and outside the cooking chamber 2.

Ainsi, la plaquette de circuit imprimé 12 d'au moins un dispositif d'éclairage 9 peut être éloignée d'une source de chaleur apportée par un magnétron et éventuellement peut être placée dans une zone de ventilation du four de cuisson à micro-ondes 1.Thus, the printed circuit board 12 of at least one lighting device 9 can be moved away from a heat source provided by a magnetron and possibly can be placed in a ventilation zone of the microwave oven 1 .

De cette manière, la plaquette de circuit imprimé 12 dudit au moins un dispositif d'éclairage 9 peut être protégée thermiquement.In this way, the printed circuit board 12 of said at least one lighting device 9 can be thermally protected.

Ledit au moins un dispositif d'éclairage 9, tel qu'illustré à la figure 5, peut comprendre un boîtier 15 dans lequel la plaquette de circuit imprimé 12 et ladite au moins une diode électroluminescente 13 peuvent être logées.Said at least one lighting device 9, as illustrated in FIG. figure 5 can include a housing 15 in which the printed circuit board 12 and said at least one light emitting diode 13 can be accommodated.

Avantageusement, le plateau 5 comprend une surface de réflexion sur sa face inférieure 5a permettant de réfléchir la lumière émise par ledit au moins un dispositif d'éclairage 9 vers l'intérieur de l'enceinte de cuisson 2.Advantageously, the plate 5 comprises a reflection surface on its lower face 5a for reflecting the light emitted by said at least one lighting device 9 towards the inside of the cooking chamber 2.

Ainsi, le plateau 5 comprend sur sa face inférieure 5a une surface de réflexion permettant la réflexion de la lumière émise par ledit au moins un dispositif d'éclairage 9 vers l'intérieur de l'enceinte de cuisson 2 et de bas en haut.Thus, the plate 5 comprises on its underside 5a a reflection surface for reflecting the light emitted by said at least one lighting device 9 to the inside of the cooking chamber 2 and from bottom to top.

La surface de réflexion du plateau 5 permet d'augmenter la luminosité à l'intérieur de l'enceinte de cuisson 2 à partir de la lumière émise par ledit au moins un dispositif d'éclairage 9 situé à l'extérieur de ladite enceinte de cuisson 2 et le long d'une face extérieure 6a dudit au moins un enfoncement 6 de la paroi inférieure 4 de ladite enceinte de cuisson 2.The reflecting surface of the plate 5 makes it possible to increase the brightness inside the cooking chamber 2 from the light emitted by the at least one lighting device 9 situated outside said cooking chamber. 2 and along an outer face 6a of said at least one depression 6 of the bottom wall 4 of said cooking chamber 2.

Pratiquement, la surface de réflexion de la face inférieure 5a du plateau 5 est une matrice de points d'une couche de sérigraphie.Practically, the reflection surface of the lower face 5a of the plate 5 is a dot matrix of a screen printing layer.

Cette surface de réflexion du plateau 5 peut être obtenue en déposant une couche de sérigraphie de points blancs sur la face inférieure 5a du plateau 5.This reflecting surface of the plate 5 can be obtained by depositing a screen printing layer of white dots on the lower face 5a of the plate 5.

La répartition de cette couche de sérigraphie, sous forme de trame, peut être déterminée précisément pour obtenir une diffusion homogène de la lumière à l'intérieur de l'enceinte de cuisson 2.The distribution of this screen printing layer, in the form of a screen, can be precisely determined to obtain a homogeneous diffusion of the light inside the cooking chamber 2.

La répartition de cette couche de sérigraphie peut être fonction de l'éloignement avec ladite au moins une diode électroluminescente 13 d'au moins un dispositif d'éclairage 9.The distribution of this screen printing layer may be a function of the distance with said at least one light-emitting diode 13 from at least one lighting device 9.

Cette surface de réflexion sur la face inférieure 5a du plateau 5 peut s'étendre sous toute la surface de ladite face inférieure 5a dudit plateau 5 ou encore partiellement.This reflection surface on the lower face 5a of the plate 5 can extend under the entire surface of said lower face 5a of said plate 5 or partially.

Dans un autre mode de réalisation de l'invention, la surface de réflexion de la face inférieure 5a du plateau 5 est obtenue en créant des aspérités dans ladite face inférieure 5a dudit plateau 5.In another embodiment of the invention, the reflection surface of the lower face 5a of the plate 5 is obtained by creating asperities in said lower face 5a of said plate 5.

Ces aspérités de la face inférieure 5a du plateau 5 peuvent être de profondeur plus ou moins importante en fonction de l'éloignement avec ladite au moins une diode électroluminescente 13 d'au moins un dispositif d'éclairage 9.These asperities of the lower face 5a of the plate 5 may be of greater or lesser depth depending on the distance with said at least one light-emitting diode 13 from at least one lighting device 9.

La répartition de ces aspérités, sous forme de trame, peut être déterminée précisément pour obtenir une diffusion homogène de la lumière à l'intérieur de l'enceinte de cuisson 2.The distribution of these asperities, in the form of wefts, can be determined precisely to obtain a homogeneous distribution of the light inside the cooking chamber 2.

Cette trame d'aspérités sur la face inférieure 5a du plateau 5 peut s'étendre sous toute la surface de ladite face inférieure 5a dudit plateau 5 ou encore partiellement.This frame of asperities on the lower face 5a of the plate 5 may extend under the entire surface of said lower face 5a of said plate 5 or partially.

Ces aspérités de la face inférieure 5a du plateau 5 peuvent être obtenues par un procédé de sablage, par un procédé de gravure laser, ou être prévues dans un moule d'obtention dudit plateau 5.These asperities of the lower face 5a of the plate 5 can be obtained by a sanding process, by a laser etching process, or be provided in a mold for obtaining said plate 5.

Préférentiellement, le four de cuisson à micro-ondes 1 comprend trois dispositifs d'éclairage 9 positionnés à équidistance les uns des autres autour du plateau 5.Preferably, the microwave oven 1 comprises three lighting devices 9 positioned equidistant from each other around the plate 5.

Ainsi, les trois dispositifs d'éclairage 9 émettent de la lumière en trois points à égale distance autour du plateau 5 de sorte que la lumière diffusée à l'intérieur de celui-ci soit répartie uniformément.Thus, the three lighting devices 9 emit light at three points equidistantly around the plate 5 so that the light diffused inside thereof is evenly distributed.

Les trois dispositifs d'éclairage 9 permettent ainsi de garantir un niveau d'intensité lumineuse dans l'enceinte de cuisson 2 de manière fiable et au moindre coût. Une telle répartition de la lumière autour du plateau 5 par les trois dispositifs d'éclairage 9 permet de s'affranchir de l'utilisation de guides de lumière ayant des formes complexes et coûteuses.The three lighting devices 9 thus make it possible to guarantee a level of luminous intensity in the cooking chamber 2 reliably and at the least cost. Such a distribution of the light around the plate 5 by the three lighting devices 9 makes it possible to overcome the use of light guides having complex and expensive shapes.

Dans le mode de réalisation de l'invention illustré aux figures 2, 3 et 6, les trois dispositifs d'éclairage 9 sont disposés autour de l'enfoncement 6 de la paroi inférieure 4 de l'enceinte de cuisson 2 avec un angle α entre chaque dispositif d'éclairage 9 de l'ordre de 120 °.In the embodiment of the invention illustrated in figures 2 , 3 and 6 , the three lighting devices 9 are arranged around the depression 6 of the bottom wall 4 of the cooking chamber 2 with an angle α between each lighting device 9 of the order of 120 °.

Dans un autre mode de réalisation de l'invention non représenté, le four de cuisson à micro-ondes 1 comprend deux dispositifs d'éclairage 9 positionnés autour du plateau 5. Ces deux dispositifs d'éclairage 9 peuvent être situés diamétralement opposés autour du plateau 5.In another embodiment of the invention not shown, the microwave oven 1 comprises two lighting devices 9 positioned around the plate 5. These two lighting devices 9 can be located diametrically opposite around the tray 5.

Bien entendu, le nombre de dispositifs d'éclairage 9 peut être égal à un, deux, trois ou plus en fonction de l'intensité lumineuse à diffuser au travers du plateau 5 et des caractéristiques de diffusion de lumière du plateau 5.Of course, the number of lighting devices 9 may be one, two, three or more depending on the light intensity to be diffused through the plate 5 and the light scattering characteristics of the plate 5.

Chacun des dispositifs d'éclairage 9 est disposé en vis-à-vis d'au moins une ouverture 10 dudit au moins un enfoncement 6 de la paroi inférieure 4 de l'enceinte de cuisson 2.Each of the lighting devices 9 is disposed opposite at least one opening 10 of the at least one depression 6 of the bottom wall 4 of the cooking chamber 2.

La fixation des dispositifs d'éclairage 9 sur la face extérieure 6a de l'enfoncement 6 de la paroi inférieure 4 de l'enceinte de cuisson 2 met en oeuvre des moyens de fixation classiques, par exemple du type par collage, vissage, encliquetage élastique. Ces moyens de fixations sont bien connus de l'homme du métier et n'ont pas besoin d'être décrits plus en détail ici.Fixing the lighting devices 9 on the outer face 6a of the recess 6 of the bottom wall 4 of the cooking chamber 2 implements conventional fixing means, for example of the type by gluing, screwing, elastic snap-fastening . These fastening means are well known to those skilled in the art and do not need to be described in more detail here.

La plaquette de circuit imprimé 12 de chaque dispositif d'éclairage 9 est reliée à une unité de commande (non représentée) du four de cuisson à micro-ondes 1, pouvant être par exemple une carte électronique de commande, directement ou non.The printed circuit board 12 of each lighting device 9 is connected to a control unit (not shown) of the microwave oven 1, which can be for example an electronic control board, directly or not.

La plaquette de circuit imprimé 12 de chaque dispositif d'éclairage 9 est reliée à l'unité de commande du four de cuisson à micro-ondes 1 au moyen d'un câble plat 17, appelé encore limande, de sorte à alimenter en énergie électrique ladite au moins une diode électroluminescente 13 dudit dispositif d'éclairage 9.The printed circuit board 12 of each lighting device 9 is connected to the control unit of the microwave oven 1 by means of a flat cable 17, still called dab, so as to supply electrical energy to said at least one light-emitting diode 13 of said lighting device 9.

Dans un mode de réalisation de l'invention, la plaquette de circuit imprimé 12 de chaque dispositif d'éclairage 9 peut être reliée à l'unité de commande au travers d'une carte de commande d'un clavier de commande 18, ou bien, la plaquette de circuit imprimé 12 de chaque dispositif d'éclairage 9 peut être reliée à l'unité de commande directement ainsi que la carte de commande du clavier de commande 18 à l'unité de commande.In one embodiment of the invention, the printed circuit board 12 of each lighting device 9 can be connected to the control unit through a control card of a control keyboard 18, or , the printed circuit board 12 of each lighting device 9 can be connected to the control unit directly and the control board of the control keyboard 18 to the control unit.

L'unité de commande du four de cuisson à micro-ondes 1 est adaptée à régler le niveau de puissance de la chaîne d'ondes.The control unit of the microwave cooking oven 1 is adapted to adjust the power level of the wavechain.

L'unité de commande comporte, de manière connue, un microcontrôleur adapté à traiter les informations provenant de la carte de commande, et ainsi à mettre en fonctionnement, éteindre ou régler le niveau de puissance de la chaîne d'ondes, et par conséquent à commander l'éclairage de ladite au moins une diode électroluminescente 13 de la plaquette de circuit imprimé 12 dudit au moins un dispositif d'éclairage 9 en fonction de la commande réalisée par l'utilisateur du four de cuisson à micro-ondes 1.The control unit comprises, in known manner, a microcontroller adapted to process the information from the control card, and thus to put into operation, extinguish or adjust the power level of the waveband, and therefore to controlling the illumination of said at least one light-emitting diode 13 of the printed circuit board 12 of said at least one lighting device 9 according to the control carried out by the user of the microwave oven 1.

Lorsque l'utilisateur commande la mise en fonctionnement du four de cuisson à micro-ondes 1, ledit au moins un dispositif d'éclairage 9 illumine l'intérieur de l'enceinte de cuisson 2 de sorte à indiquer cette commande.When the user controls the operation of the microwave oven 1, the at least one lighting device 9 illuminates the inside of the cooking chamber 2 so as to indicate this command.

Lorsque l'unité de commande règle le niveau de puissance de la chaîne d'ondes du four de cuisson à micro-ondes 1, ledit au moins un dispositif d'éclairage 9 peut illuminer l'intérieur de l'enceinte de cuisson 2 de sorte à indiquer cet état de fonctionnement.When the control unit adjusts the power level of the microwave oven 1 microwave channel, said at least one lighting device 9 can illuminate the interior of the cooking chamber 2 so that to indicate this operating state.

La nuance de couleur et/ou l'intensité lumineuse de ladite au moins une diode électroluminescente 13 peut varier en fonction du niveau de puissance demandé par l'utilisateur.The color shade and / or light intensity of said at least one light emitting diode 13 may vary depending on the power level required by the user.

De manière générale, l'intensité lumineuse peut augmenter lorsque la puissance demandée par l'utilisateur augmente. La nuance de couleur peut s'assombrir, par exemple du jaune au rouge, lorsque la puissance demandée par l'utilisateur augmente.In general, the light intensity can increase when the power demanded by the user increases. The color shade may darken, for example from yellow to red, as the power demanded by the user increases.

La nuance de couleur peut évoluer, par exemple du jaune au rouge, lorsque le niveau de puissance demandé par l'utilisateur augmente, et inversement lorsque le niveau de puissance demandé par l'utilisateur diminue. Cette évolution de nuance de couleur peut être réalisée avec des diodes électroluminescentes 13 de couleur différentes s'allumant les unes après les autres.The color shade can change, for example from yellow to red, when the power level requested by the user increases, and conversely when the power level requested by the user decreases. This change in color shade can be achieved with light-emitting diodes 13 of different colors lighting one after the other.

Dans un autre mode de réalisation de l'invention, l'intensité lumineuse peut augmenter lorsque le niveau de puissance demandé par l'utilisateur augmente, et inversement lorsque le niveau de puissance demandé par l'utilisateur diminue. Cette évolution d'intensité lumineuse peut être réalisée avec des diodes électroluminescentes 13 de couleur identique, par exemple rouge, s'allumant ou s'éteignant les unes après les autres, ou bien, s'allumant ou s'éteignant simultanément et en modifiant la tension traversant celles-ci.In another embodiment of the invention, the light intensity can increase when the power level requested by the user increases, and conversely when the power level requested by the user decreases. This change in light intensity can be achieved with light-emitting diodes 13 of identical color, for example red, switching on or off one after the other, or, switching on or off simultaneously and changing the voltage therethrough.

Dans un mode de réalisation de l'invention illustré à la figure 7, l'enceinte de cuisson 2 comprend une paroi en forme de dôme 3 se positionnant au-dessus d'une paroi inférieure 4 de sorte à définir un espace de cuisson.In one embodiment of the invention illustrated in figure 7 , the cooking chamber 2 comprises a dome-shaped wall 3 positioned above a bottom wall 4 so as to define a cooking space.

Ainsi, le volume utile de l'enceinte de cuisson 2 est réduit de sorte à limiter les zones de ladite enceinte de cuisson 2 inutiles lors du chauffage d'un aliment à chauffer posé sur un plateau 5.Thus, the useful volume of the cooking chamber 2 is reduced so as to limit the areas of said cooking chamber 2 unnecessary during heating of a food to be heated on a plate 5.

La paroi en forme de dôme 3 de l'enceinte de cuisson 2 est réalisée dans un matériau adapté à diffuser la lumière vers l'extérieur du four de cuisson à micro-ondes 1.The dome-shaped wall 3 of the cooking chamber 2 is made of a material adapted to diffuse light towards the outside of the microwave oven 1.

La paroi en forme de dôme 3 de l'enceinte de cuisson 2 est réalisée dans un matériau n'absorbant pas les micro-ondes pour éviter un échauffement de celle-ci et transparente pour permettre à l'utilisateur de visualiser à l'intérieur de l'enceinte de cuisson 2.The dome-shaped wall 3 of the cooking chamber 2 is made of a material that does not absorb the microwaves to avoid heating thereof and that is transparent to allow the user to view the interior of the room. the cooking chamber 2.

La paroi en forme de dôme 3 de l'enceinte de cuisson 2 peut être réalisée par exemple en verre, ou en matière plastique telle que du polycarbonate ou du polyméthacrylate.The dome-shaped wall 3 of the cooking chamber 2 may be made for example of glass, or of plastics material such as polycarbonate or polymethacrylate.

Ainsi, la lumière émise par au moins un dispositif d'éclairage 9 est diffusée à l'intérieur de l'enceinte de cuisson 2 au travers du plateau 5 puis à l'extérieur de l'enceinte de cuisson 2 au travers de la paroi en forme de dôme 3.Thus, the light emitted by at least one lighting device 9 is diffused inside the cooking chamber 2 through the plate 5 and then outside the cooking chamber 2 through the wall. dome shape 3.

De cette manière, l'utilisateur peut visualiser la lumière émise à l'intérieur de l'enceinte de cuisson 2 en étant à distance du four de cuisson à micro-ondes 1 et sans rester en face de celui-ci lors de son fonctionnement.In this way, the user can view the light emitted inside the cooking chamber 2 while being away from the microwave oven 1 and without remaining in front of it during its operation.

Un tel four de cuisson à micro-ondes 1 permet de pallier à l'inconvénient des fours de cuisson à micro-ondes actuels où l'utilisateur ne connaît pas l'état de fonctionnement de ceux-ci de manière interactive grâce audit au moins un dispositif d'éclairage 9 diffusant de la lumière à l'extérieur dudit four de cuisson à micro-ondes 1 au travers de la paroi en forme de dôme 3.Such a microwave oven 1 overcomes the disadvantage of current microwave cooking ovens where the user does not know the operating state of these interactively through audit at least one lighting device 9 diffusing light outside said microwave cooking oven 1 through the dome-shaped wall 3.

La paroi en forme de dôme 3 de l'enceinte de cuisson 2 enferme un piège à ondes.The dome-shaped wall 3 of the cooking chamber 2 encloses a wave trap.

Ainsi, les micro-ondes circulant à l'intérieur de l'enceinte de cuisson 2 ne peuvent pas fuir à l'extérieur du four de cuisson à micro-ondes 1.Thus, the microwaves circulating inside the cooking chamber 2 can not leak outside the microwave oven 1.

La paroi en forme de dôme 3 de l'enceinte de cuisson 2 représentée aux figures 7 et 8 représente le piège à ondes et le matériau transparent positionné autour dudit piège à ondes. Ce matériau transparent permet de diffuser la lumière à l'extérieur de l'enceinte de cuisson 2 ainsi que de protéger le piège à ondes des projections liées au chauffage d'aliments.The dome-shaped wall 3 of the cooking chamber 2 shown in FIGS. Figures 7 and 8 represents the wave trap and the transparent material positioned around said wave trap. This transparent material makes it possible to diffuse the light outside the cooking chamber 2 as well as to protect the wave trap from the projections associated with the heating. food.

Le four de cuisson à micro-ondes 1 peut comprendre au moins un dispositif d'éclairage additionnel 20.The microwave oven 1 may comprise at least one additional lighting device 20.

Ainsi, ledit au moins un dispositif d'éclairage additionnel 20 permet de combiner la lumière émise par ce dernier avec celle d'au moins un dispositif d'éclairage 9 de sorte à augmenter la luminosité dans l'enceinte de cuisson 2.Thus, said at least one additional lighting device 20 makes it possible to combine the light emitted by the latter with that of at least one lighting device 9 so as to increase the brightness in the cooking chamber 2.

Dans un mode de réalisation de l'invention, ledit au moins un dispositif d'éclairage additionnel 20 se situe au sommet de la paroi en forme de dôme 3 de l'enceinte de cuisson 2 de sorte à diffuser de la lumière de haut en bas dans ladite enceinte de cuisson 2.In one embodiment of the invention, said at least one additional lighting device 20 is located at the top of the dome-shaped wall 3 of the cooking chamber 2 so as to diffuse light from top to bottom in said cooking chamber 2.

Ainsi, un article à chauffer posé sur le plateau 5 à l'intérieur de l'enceinte de cuisson 2 est éclairé depuis le bas vers le haut par au moins un dispositif d'éclairage 9 au travers dudit plateau 5 et depuis le haut vers le bas par au moins un dispositif d'éclairage additionnel 20 situé en partie supérieure de ladite enceinte de cuisson 2.Thus, an article to be heated placed on the plate 5 inside the cooking chamber 2 is illuminated from the bottom upwards by at least one lighting device 9 through said plate 5 and from the top to the bottom by at least one additional lighting device 20 located in the upper part of said cooking chamber 2.

Ledit au moins un dispositif d'éclairage 9 et ledit au moins un dispositif d'éclairage additionnel 20 peuvent être mis en fonctionnement simultanément ou indépendamment, par exemple en fonction de l'état de fonctionnement du four de cuisson à micro-ondes 1 ou de la commande donnée par l'utilisateur à une unité de commande.Said at least one lighting device 9 and said at least one additional lighting device 20 can be operated simultaneously or independently, for example depending on the operating state of the microwave oven 1 or the command given by the user to a control unit.

Ledit au moins un dispositif d'éclairage 9 et ledit au moins un dispositif d'éclairage additionnel 20 peuvent être adaptés à émettre une lumière de couleur identique ou différente.Said at least one lighting device 9 and said at least one additional lighting device 20 may be adapted to emit light of the same or different color.

Pratiquement, ledit au moins un dispositif d'éclairage additionnel 20 comprend une plaquette de circuit imprimé 21, ladite plaquette de circuit imprimé 21 comprenant au moins une diode électroluminescente 22, tel qu'illustré à la figure 8.In practice, said at least one additional lighting device 20 comprises a printed circuit board 21, said printed circuit board 21 comprising at least one light-emitting diode 22, as illustrated in FIG. figure 8 .

Ainsi, ledit au moins un dispositif d'éclairage additionnel 20 permet de modifier la nuance de couleur et/ou l'intensité lumineuse de manière simple, peu onéreuse et dans une large plage de couleur et/ou d'intensité.Thus, said at least one additional lighting device 20 makes it possible to modify the color shade and / or the light intensity simply, inexpensively and in a wide range of colors and / or intensities.

Le nombre de diodes électroluminescentes 22 peut être compris entre une et plusieurs. Chaque diode électroluminescente 22 peut être d'une couleur identique ou différente.The number of light-emitting diodes 22 may be between one and more. Each light-emitting diode 22 may be of the same or different color.

Bien entendu, le nombre de diodes électroluminescentes 22 n'est nullement limitatif.Of course, the number of light-emitting diodes 22 is in no way limiting.

Avantageusement, ledit au moins un dispositif d'éclairage additionnel 20 comprend au moins une lentille 23 entre ladite au moins une diode électroluminescente 22 et une paroi 24 d'un logement 25 de la paroi en forme de dôme 3 de l'enceinte de cuisson 2.Advantageously, said at least one additional lighting device 20 comprises at least one lens 23 between said at least one light-emitting diode 22 and a wall 24 of a housing 25 of the dome-shaped wall 3 of the cooking chamber 2 .

Ainsi, la lumière émise par ladite au moins une diode électroluminescente 22 d'au moins un dispositif d'éclairage additionnel 20 est dirigée par ladite au moins une lentille 23 en direction de l'intérieur de l'enceinte de cuisson 2.Thus, the light emitted by said at least one light-emitting diode 22 from at least one additional lighting device 20 is directed by said at least one lens 23 towards the interior of the cooking chamber 2.

En outre, ladite au moins une lentille 23 permet de protéger ladite au moins une diode électroluminescente 22 d'au moins un dispositif d'éclairage additionnel 20.In addition, said at least one lens 23 makes it possible to protect said at least one light-emitting diode 22 from at least one additional lighting device 20.

Ledit au moins un dispositif d'éclairage additionnel 20 est disposé à l'intérieur d'un logement 25 à l'extérieur de l'enceinte de cuisson 2.Said at least one additional lighting device 20 is disposed inside a housing 25 outside the cooking chamber 2.

La paroi 24 du logement 25 de la paroi en forme de dôme 3 de l'enceinte de cuisson 2 comprend au moins une ouverture 29 permettant le passage de la lumière émise par ledit au moins un dispositif d'éclairage additionnel 20 vers l'intérieur de ladite enceinte de cuisson 2.The wall 24 of the housing 25 of the dome-shaped wall 3 of the cooking chamber 2 comprises at least one opening 29 allowing the passage of the light emitted by the at least one additional lighting device 20 towards the interior of the said cooking chamber 2.

Ladite au moins une ouverture 29 de la paroi 24 du logement 25 de la paroi en forme de dôme 3 de l'enceinte de cuisson 2 comprend une pluralité de trous 30.Said at least one opening 29 of the wall 24 of the housing 25 of the dome-shaped wall 3 of the cooking chamber 2 comprises a plurality of holes 30.

Ainsi, les trous 30 de ladite au moins une ouverture 29 ménagés dans la paroi 24 du logement 25 de la paroi en forme de dôme 3 de l'enceinte de cuisson 2 permettent à la lumière émise par ledit au moins un dispositif d'éclairage additionnel 20 d'être diffusée en direction de l'intérieur de l'enceinte de cuisson 2 et sont dimensionnés de sorte à empêcher les micro-ondes de sortir par lesdits trous 30. Le four de cuisson à micro-ondes 1 présente ainsi le minimum de fuites de micro-ondes à l'extérieur de l'enceinte de cuisson 2.Thus, the holes 30 of said at least one opening 29 formed in the wall 24 of the housing 25 of the dome-shaped wall 3 of the cooking chamber 2 allow the light emitted by said at least one additional lighting device. 20 to be diffused towards the inside of the cooking chamber 2 and are dimensioned so as to prevent the microwaves from leaving through said holes 30. The microwave oven 1 thus has the minimum of microwave leakage outside the cooking chamber 2.

Le dimensionnement des trous 30 de ladite au moins une ouverture 29 ménagés dans la paroi 24 du logement 25 de la paroi en forme de dôme 3 de l'enceinte de cuisson 2 est bien connu de l'homme du métier de sorte à empêcher les micro-ondes de sortir par lesdits trous 30 et n'a pas besoin d'être décrit plus en détail ici.The dimensioning of the holes 30 of said at least one opening 29 formed in the wall 24 of the housing 25 of the dome-shaped wall 3 of the cooking chamber 2 is well known to those skilled in the art so as to prevent the micro -ondes to exit through said holes 30 and need not be described in more detail here.

Les trous 30 de ladite au moins une ouverture 29 de la paroi 24 du logement 25 de la paroi en forme de dôme 3 de l'enceinte de cuisson 2 peuvent être de forme hexagonale, circulaire, etc.The holes 30 of said at least one opening 29 of the wall 24 of the housing 25 of the dome-shaped wall 3 of the cooking chamber 2 may be hexagonal, circular, and so on.

Bien entendu, la forme des trous 30 n'est nullement limitative et peut être réalisée de manière différente.Of course, the shape of the holes 30 is in no way limiting and can be performed differently.

La forme hexagonale des trous 30 de ladite au moins une ouverture 29 ménagés dans la paroi 24 du logement 25 de la paroi en forme de dôme 3 de l'enceinte de cuisson 2 peut permettre d'améliorer la diffusion de lumière en direction de l'intérieur de l'enceinte de cuisson 2 tout en étant dimensionnés de sorte à ne pas provoquer de fuites micro-ondes.The hexagonal shape of the holes 30 of said at least one opening 29 formed in the wall 24 of the housing 25 of the dome-shaped wall 3 of the cooking chamber 2 may make it possible to improve the light diffusion in the direction of the inside the cooking chamber 2 while being dimensioned so as not to cause microwave leakage.

La fixation dudit au moins un dispositif d'éclairage additionnel 20 dans le logement 25 met en oeuvre des moyens de fixation classiques, par exemple du type par collage, vissage, encliquetage élastique. Ces moyens de fixation sont bien connus de l'homme du métier et n'ont pas besoin d'être décrits plus en détail ici.Fixing said at least one additional lighting device 20 in the housing 25 implements conventional fastening means, for example of the type by gluing, screwing, snap elastic. These attachment means are well known to those skilled in the art and do not need to be described in more detail here.

Ledit au moins un dispositif d'éclairage additionnel 20, tel qu'illustré à la figure 8, peut comprendre un boîtier (non représenté) dans lequel la plaquette de circuit imprimé 21 et ladite au moins une diode électroluminescente 22 peuvent être logées.Said at least one additional lighting device 20, as illustrated in FIG. figure 8 , may comprise a housing (not shown) in which the printed circuit board 21 and said at least one light emitting diode 22 can be accommodated.

La plaquette de circuit imprimé 21 dudit au moins un dispositif d'éclairage additionnel 20 est reliée à l'unité de commande du four de cuisson à micro-ondes 1 au moyen d'un câble plat (non représenté), appelé encore limande, de sorte à alimenter en énergie électrique ladite au moins une diode électroluminescente 22 dudit au moins un dispositif d'éclairage additionnel 20.The printed circuit board 21 of said at least one additional lighting device 20 is connected to the control unit of the microwave cooking oven 1 by means of a flat cable (not shown), still called dab, of so as to supply electrical energy to said at least one light-emitting diode 22 of said at least one additional lighting device 20.

La plaquette de circuit imprimé 21 dudit au moins un dispositif d'éclairage additionnel 20 est reliée à une unité de commande (non représentée) du four de cuisson à micro-ondes 1, pouvant être par exemple une carte électronique de commande, directement ou non.The printed circuit board 21 of said at least one additional lighting device 20 is connected to a control unit (not shown) of the microwave oven 1, which may be for example an electronic control board, directly or otherwise. .

Ledit au moins un dispositif d'éclairage additionnel 20 est alimenté en énergie électrique au moyen d'une connexion électrique passant au travers d'une charnière 26 reliant la paroi inférieure 4 de l'enceinte de cuisson 2 à la paroi en forme de dôme 3 de ladite enceinte de cuisson 2.Said at least one additional lighting device 20 is supplied with electrical energy by means of an electrical connection passing through a hinge 26 connecting the bottom wall 4 of the cooking chamber 2 to the dome-shaped wall 3 of said cooking chamber 2.

L'enceinte de cuisson 2 comprend un bras d'articulation 27 reliant la paroi en forme de dôme 3 à la paroi inférieure 4, et ledit bras d'articulation 27 comprenant un logement de passage 28 d'une liaison filaire d'alimentation électrique dudit au moins un dispositif d'éclairage additionnel 20.The cooking chamber 2 comprises a hinge arm 27 connecting the dome-shaped wall 3 to the bottom wall 4, and said hinge arm 27 comprising a passage housing 28 of a wired power supply connection of said at least one additional lighting device 20.

Bien entendu, de nombreuses modifications peuvent être apportées à l'exemple de réalisation décrit précédemment sans sortir du cadre de l'invention.Of course, many modifications can be made to the embodiment described above without departing from the scope of the invention.

En particulier, l'enceinte de cuisson peut être logée dans une carrosserie et comprendre une ouverture en face frontale obturée par une porte.In particular, the cooking chamber can be housed in a body and include an opening on the end face closed by a door.

La porte est réalisée dans un matériau adapté à diffuser la lumière vers l'extérieur du four de cuisson à micro-ondes, tel que par exemple en matière plastique transparente ou en verre.The door is made of a material adapted to diffuse light to the outside of the microwave oven, such as for example transparent plastic material or glass.

Ainsi, la lumière émise par au moins un dispositif d'éclairage est diffusée à l'intérieur de l'enceinte de cuisson au travers du plateau puis à l'extérieur de l'enceinte de cuisson au travers de la porte.Thus, the light emitted by at least one lighting device is diffused inside the cooking chamber through the plate and then outside the cooking chamber through the door.

L'enceinte de cuisson comprend au moins une paroi inférieure, également appelée sole. L'enceinte de cuisson peut comprendre également une paroi supérieure, également appelée voûte, et des parois latérales. Les parois de l'enceinte de cuisson permettent de définir une cavité pour le chauffage ou la cuisson d'aliments.The cooking chamber comprises at least one bottom wall, also called sole. The cooking chamber may also comprise an upper wall, also called a vault, and side walls. The walls of the cooking chamber are used to define a cavity for heating or cooking food.

Claims (14)

Four de cuisson à micro-ondes (1) comprenant une enceinte de cuisson (2), ladite enceinte de cuisson (2) comprenant au moins une paroi inférieure (4), ladite enceinte de cuisson (2) comprenant un plateau (5) logé dans au moins un enfoncement (6) de ladite paroi inférieure (4), ledit four de cuisson à micro-ondes (1) comprenant également au moins un dispositif d'éclairage (9) situé à l'extérieur de ladite enceinte de cuisson (2), caractérisé en ce que : - ledit au moins un dispositif d'éclairage (9) est également situé le long d'une face extérieure (6a) dudit au moins un enfoncement (6) de ladite paroi inférieure (4) de ladite enceinte de cuisson (2) ; - ledit au moins un enfoncement (6) de ladite paroi inférieure (4) de ladite enceinte de cuisson (2) comprend au moins une ouverture (10) permettant le passage de la lumière émise par ledit au moins un dispositif d'éclairage (9) vers l'intérieur de ladite enceinte de cuisson (2) ; et - ledit plateau (5) comprend au moins une paroi latérale (11) placée en vis-à-vis de ladite au moins une ouverture (10) dudit au moins un enfoncement (6) de ladite paroi inférieure (4) de ladite enceinte de cuisson (2) de sorte à diffuser la lumière au travers dudit plateau (5). Microwave oven (1) comprising a cooking chamber (2), said cooking chamber (2) comprising at least one bottom wall (4), said cooking chamber (2) comprising a tray (5) housed in at least one depression (6) of said bottom wall (4), said microwave cooking oven (1) also comprising at least one lighting device (9) located outside said cooking chamber ( 2), characterized in that : said at least one lighting device (9) is also located along an outer face (6a) of said at least one recess (6) of said lower wall (4) of said cooking chamber (2); said at least one recess (6) of said bottom wall (4) of said cooking chamber (2) comprises at least one opening (10) allowing the passage of the light emitted by said at least one lighting device (9); ) towards the inside of said cooking chamber (2); and said plate (5) comprises at least one side wall (11) placed opposite said at least one opening (10) of said at least one recess (6) of said bottom wall (4) of said enclosure of said cooking (2) so as to diffuse the light through said plate (5). Four de cuisson à micro-ondes (1) selon la revendication 1, caractérisé en ce que ledit four de cuisson à micro-ondes (1) comprend trois dispositifs d'éclairage (9) positionnés à équidistance les uns des autres autour dudit plateau (5).Microwave oven (1) according to claim 1, characterized in that said microwave cooking oven (1) comprises three lighting devices (9) positioned equidistant from each other around said plate ( 5). Four de cuisson à micro-ondes (1) selon la revendication 1 ou 2, caractérisé en ce que ledit au moins un dispositif d'éclairage (9) comprend une plaquette de circuit imprimé (12), ladite plaquette de circuit imprimé (12) comprenant au moins une diode électroluminescente (13).Microwave oven (1) according to claim 1 or 2, characterized in that said at least one lighting device (9) comprises a printed circuit board (12), said printed circuit board (12) comprising at least one light emitting diode (13). Four de cuisson à micro-ondes (1) selon la revendication 3, caractérisé en ce que ledit au moins un dispositif d'éclairage (9) comprend au moins une lentille (16) entre ladite au moins une diode électroluminescente (13) et ladite face extérieure (6a) dudit au moins un enfoncement (6) de ladite paroi inférieure (4) de ladite enceinte de cuisson (2).Microwave oven (1) according to claim 3, characterized in that said at least one lighting device (9) comprises at least one lens (16) between said at least one light emitting diode (13) and said outer face (6a) of said at least one depression (6) of said bottom wall (4) of said cooking chamber (2). Four de cuisson à micro-ondes (1) selon l'une quelconque des revendications 1 à 4, caractérisé en ce que ledit plateau (5) est réalisé dans un matériau adapté à diffuser la lumière, et en particulier en verre.Microwave oven (1) according to any one of claims 1 to 4, characterized in that said plate (5) is made of a material adapted to diffuse light, and in particular glass. Four de cuisson à micro-ondes (1) selon l'une quelconque des revendications 1 à 5, caractérisé en ce que ledit plateau (5) comprend une surface de réflexion sur sa face inférieure (5a) permettant de réfléchir la lumière émise par ledit au moins un dispositif d'éclairage (9) vers l'intérieur de ladite enceinte de cuisson (2).Microwave oven (1) according to any one of claims 1 to 5, characterized in that said plate (5) comprises a reflection surface on its lower face (5a) for reflecting the light emitted by said at least one lighting device (9) towards the inside of said cooking chamber (2). Four de cuisson à micro-ondes (1) selon la revendication 6, caractérisé en ce que ladite surface de réflexion de ladite face inférieure (5a) dudit plateau (5) est une matrice de points d'une couche de sérigraphie.Microwave oven (1) according to claim 6, characterized in that said reflection surface of said lower face (5a) of said plate (5) is a dot matrix of a screen printing layer. Four de cuisson à micro-ondes (1) selon l'une quelconque des revendications 1 à 7, caractérisé en ce que ladite au moins une ouverture (10) dudit au moins un enfoncement (6) de ladite paroi inférieure (4) de ladite enceinte de cuisson (2) comprend une pluralité de trous (19).Microwave oven (1) according to any one of claims 1 to 7, characterized in that said at least one opening (10) of said at least one recess (6) of said bottom wall (4) of said cooking chamber (2) comprises a plurality of holes (19). Four de cuisson à micro-ondes (1) selon l'une quelconque des revendications 1 à 8, caractérisé en ce que ladite enceinte de cuisson (2) comprend une paroi en forme de dôme (3) se positionnant au-dessus de ladite paroi inférieure (4) de sorte à définir un espace de cuisson.Microwave oven (1) according to any one of claims 1 to 8, characterized in that said cooking chamber (2) comprises a dome-shaped wall (3) positioned above said wall lower (4) so as to define a cooking space. Four de cuisson à micro-ondes (1) selon la revendication 9, caractérisé en ce que ladite paroi en forme de dôme (3) de ladite enceinte de cuisson (2) est réalisée dans un matériau adapté à diffuser la lumière vers l'extérieur dudit four de cuisson à micro-ondes (1).Microwave oven (1) according to claim 9, characterized in that said dome-shaped wall (3) of said cooking chamber (2) is made of a material adapted to diffuse the light outwards said microwave oven (1). Four de cuisson à micro-ondes (1) selon la revendication 9 ou 10, caractérisé en ce que ladite paroi en forme de dôme (3) de ladite enceinte de cuisson (2) enferme un piège à ondes.Microwave oven (1) according to claim 9 or 10, characterized in that said dome-shaped wall (3) of said cooking chamber (2) encloses a wave trap. Four de cuisson à micro-ondes (1) selon l'une quelconque des revendication 9 à 11, caractérisé en ce que ledit four de cuisson à micro-ondes (1) comprend au moins un dispositif d'éclairage additionnel (20), et ledit au moins un dispositif d'éclairage additionnel (20) se situant au sommet de ladite paroi en forme de dôme (3) de ladite enceinte de cuisson (2) de sorte à diffuser de la lumière de haut en bas dans ladite enceinte de cuisson (2).Microwave oven (1) according to any one of claims 9 to 11, characterized in that said microwave cooking oven (1) comprises at least one additional lighting device (20), and said at least one additional lighting device (20) located at the top of said dome-shaped wall (3) of said cooking chamber (2) so as to diffuse light up and down in said cooking chamber (2). Four de cuisson à micro-ondes (1) selon la revendication 12, caractérisé en ce que ledit au moins un dispositif d'éclairage additionnel (20) est alimenté en énergie électrique au moyen d'une connexion électrique passant au travers d'une charnière (26) reliant ladite paroi inférieure (4) de ladite enceinte de cuisson (2) à ladite paroi en forme de dôme (3) de ladite enceinte de cuisson (2).Microwave oven (1) according to claim 12, characterized in that said at least one additional lighting device (20) is supplied with electrical energy by means of an electrical connection passing through a hinge (26) connecting said bottom wall (4) of said cooking chamber (2) to said domed wall (3) of said cooking chamber (2). Four de cuisson à micro-ondes (1) selon la revendication 12 ou 13, caractérisé en ce que ladite enceinte de cuisson (2) comprend un bras d'articulation (27) reliant ladite paroi en forme de dôme (3) à ladite paroi inférieure (4), et ledit bras d'articulation (27) comprenant un logement de passage (28) d'une liaison filaire d'alimentation électrique dudit au moins un dispositif d'éclairage additionnel (20).Microwave oven (1) according to claim 12 or 13, characterized in that said cooking chamber (2) comprises a hinge arm (27) connecting said dome-shaped wall (3) to said wall lower (4), and said hinge arm (27) comprising a passage housing (28) of a wired power supply connection of said at least one additional lighting device (20).
EP20100159569 2009-04-14 2010-04-09 Microwave oven including at least one lighting device Active EP2242331B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0901815A FR2944406B1 (en) 2009-04-14 2009-04-14 MICROWAVE COOKING OVEN COMPRISING AT LEAST ONE LIGHTING DEVICE

Publications (2)

Publication Number Publication Date
EP2242331A1 true EP2242331A1 (en) 2010-10-20
EP2242331B1 EP2242331B1 (en) 2012-09-12

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ID=41667555

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Application Number Title Priority Date Filing Date
EP20100159569 Active EP2242331B1 (en) 2009-04-14 2010-04-09 Microwave oven including at least one lighting device

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EP (1) EP2242331B1 (en)
ES (1) ES2395373T3 (en)
FR (1) FR2944406B1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2353897A (en) 1999-08-31 2001-03-07 Lg Electronics Inc Preventing leakage of microwaves, e.g. from ovens and lamps

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2353897A (en) 1999-08-31 2001-03-07 Lg Electronics Inc Preventing leakage of microwaves, e.g. from ovens and lamps

Also Published As

Publication number Publication date
FR2944406B1 (en) 2011-04-01
ES2395373T3 (en) 2013-02-12
FR2944406A1 (en) 2010-10-15
EP2242331B1 (en) 2012-09-12

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