EP2913591B1 - Cooking device with a specific cooling of a lighting device - Google Patents

Description

The invention relates to a cooking appliance with a cooking chamber which is bounded by walls of a muffle. In addition, the cooking appliance comprises an air guiding device, which has at least one air duct for supplying a cooling air flow to a lighting device of the cooking appliance arranged for illuminating the cooking chamber. The air duct is arranged in a positional arrangement and viewed in the vertical direction of the cooking appliance above a muffle, and the air guiding device has an air shaft bottom and an air duct cover.
Such a cooking appliance is for example from the EP 2 333 425 A1 known. The local, relatively large built incandescent lamp is attached to a ceiling wall of the muffle, so that it extends partially with their filament into the cooking chamber. The air duct is designed there so that the sucked by a fan from above air is distributed into different branches and in connection with the local design only pressure shaft sections are present, which then form the air shaft.
A corresponding embodiment is also from the EP 2 463 588 A1 known. There are also openings in an air duct cover adjacent to the base of the local lamp formed in order to allow air to flow accordingly.
In the known embodiments, the light sources extend even partially into the cooking chamber, so that they are exposed to corresponding temperature influences. In addition, due to the size of the lamps shown, a corresponding space requirement. In particular, then the cooling effect is limited.

The FR 2 930 815 A1 describes a baking oven according to the preamble of claim 1, in which a lamp arranged outside a cooking chamber is cooled by means of an air flow conveyed by a fan.

It is an object of the present invention to provide a cooking appliance in which a light source of a lighting device for illuminating a cooking chamber of the cooking appliance can be cooled in an improved manner and is protected in view of undesirable temperature influences during operation of the cooking appliance.

This object is achieved by a cooking appliance according to claim 1.

An inventive cooking appliance comprises a cooking chamber which is bounded by walls of a muffle. In addition, the cooking appliance comprises an air guiding device, which has at least one air duct for supplying a cooling air flow to a lighting device of the cooking appliance arranged for illuminating the cooking chamber. The air duct is viewed in the vertical direction of the cooking appliance above or above the muffle of the cooking appliance, and the air guiding device has an air shaft bottom and an air shaft cover.

An essential idea of the invention is to be seen in that the lighting device has at least one light source arranged completely outside the cooking chamber. The light source is flowed around by the cooling air flow. The cooling air flow is very specific. It is guided from a device chamber of the cooking appliance, which is viewed in the vertical direction of the cooking appliance over the duct cover, into a pressure shaft section of the duct which is viewed with respect to a fluidic position of a fan in the air duct device. The air-guiding device is also substantially designed to have a suction-chamber section separate from the equipment compartment and viewed in relation to a fluidic position of the fan in the air-guiding device. In the embodiment of the air guiding device of the cooking appliance according to the invention thus a very specific air duct is designed, which not only, as in the prior art consists of pressure shaft sections, but also has at least one suction shaft section in addition to at least one pressure shaft section. This means that the blower is arranged in particular in the air guiding device such that, on the one hand, air is sucked through the operation of the blower in the air shaft and thus sucked towards the blower and this takes place via the suction chute section. On the other hand, the air duct with the pressure duct section comprises a region in which the air is forced away from the blower by its operation. Through this two-shaft principle the delivery of cooling air on the one hand and the discharge of exhaust air or heated cooling air is favored.

In particular, it is achieved that the fluidic principle and the arrangement of the components arranged to improve space and also interact functionally improved. In particular, it is thus also possible, in a door of the cooking appliance, which is fluidically cooled to make a coupling of the suction chute section to be cooled areas in the door, so that virtually sucked by the operation of the fan air from the outside, which then on the specific airways in the door and thereby cause a desired cooling effect of components of the door at specific locations. The sucked in this respect of the environment and then directly into the door-directed air is then introduced or sucked in particular in an upper region of the door in the suction shaft section of the air duct, this is also effected via the fan of the air ducting device and is then sucked to the blower, where it is then passed on to the pressure shaft section and then discharged from this at the end to the outside.

Due to this above-mentioned embodiment of the arrangement of the light source and the cooling via the very specifically guided cooling air flow, an improved cooling effect of the light source is achieved. On the one hand by their positional arrangement outside the cooking chamber, on the other hand by the particular favored improved path from the cooling air flow, which is generated and conducted here individually, here also the direct flow of the light source can be done over short distances and thus with the coolest possible air ,

It is provided that the illumination device has at least one light guide through which the light emitted by the light source can be conducted into the cooking chamber. With this configuration, the positionally external arrangement of the light source is favored to the cooking chamber to the effect that a maximum amount of light emitted from the light source light can get into the cooking chamber. A particularly emphasized illumination of the cooking chamber in embodiment with an externally arranged to the cooking light source is made possible.

Furthermore, it is provided that a first optical waveguide extends in the form of a rod and projects through the pressure shaft section and extends through an opening in the air shaft bottom. Due to this local specification of the position of the optical waveguide and its shape design, a maximum possible amount of light is introduced into the oven and also reaches the cooling effect of the cooling air flow to the light guide. Also, the light guide, which is exposed at least at its end facing the cooking chamber there and exposed to the temperature influences in the cooking chamber, in the context, even with a corresponding Temperaturbeaufschlagung a positive cooling effect by the extension into the pressure shaft section and the associated direct flow around the Coming cooling air stream.

In addition, it can additionally be provided that the lighting device has a heat sink, which is thermally coupled to the air shaft bottom and / or the duct cover. On the one hand, an additional heat sink for the lighting device and in particular the light source is achieved in this embodiment by an additional heat sink anyway, on the other hand, a further improvement of the cooling effect and thus also the heat dissipation is additionally made possible by the very specific thermal coupling of this heat sink beyond. Because by the thermal coupling of the heat sink to the air shaft bottom and / or the duct cover, which are relatively large in area relative to the cooling body, a corresponding heat emission to these components is possible.

The invention therefore achieves an improvement in the positional arrangement of the light source and its thermal management in many respects with the embodiment.

It is preferably provided that the light source is a light-emitting diode. This is a particularly advantageous embodiment, since a light-emitting diode is constructed very compact and is very energy efficient operable. However, light-emitting diodes are more sensitive with regard to temperature influences, so that the invention for a light-emitting diode is of particular advantage.

It is preferably provided that at least one light source extends into the pressure shaft section. By this configuration, it is on the one hand to a certain extent protected and not impaired in the installed state by other components, on the other hand, this embodiment allows a particularly effective cooling effect, since the cooling air flow can act even more extensive and direct on the completely arranged therein light source.

Preferably, this optical fiber also extends through an opening in a top wall of the muffle when the cooking appliance is an oven without a microwave function.

In a specific cooking appliance, which also has a microwave function, the top wall of the muffle is preferably also formed by the air shaft bottom, so that here an assembly of these two functions takes place.

It is preferably provided that the lighting device has a first sub-device, which is formed for light irradiation in the oven by a top wall of the muffle. A first heat sink of this first divider is disposed on the duct cover, and at least one air passage hole is formed in the heat sink, through which the flow of cooling air from the equipment space into the pressure chute portion can be introduced. Such a configuration is particularly advantageous, since thus the suction of the cooling air from outside the duct and thus of the equipment compartment in the duct is not locally remote from the heat sink and the light source, but takes place directly through the heat sink itself. This is particularly advantageous in that the air from the equipment compartment is then still maximally cool and thus has a direct positive cooling effect on the heat sink and the light source when it is sucked into the pressure shaft section. The cooling air flow has thus done in this embodiment, no previous path in the duct, and then to reach the heat sink and the light source, so that he would not already in this respect also heated to some extent before reaching the heat sink and the light source.

It is preferably provided that this first heat sink is a plate. As a result, the heat sink is designed very flat. In addition, this embodiment also allows the formation of a plurality of holes for passing the cooling air flow from the equipment compartment into the air shaft. In addition, this embodiment as a plate as large as possible contact with the air shaft bottom and / or the air duct cover is reached, so that here too as large as possible and with respect to the heat dissipation and the transfer of heat from the heat sink to this device of the duct is particularly favored.

Preferably, this first heat sink is arranged on the duct cover. As a result, the above advantages are favored again.

In a further advantageous embodiment, it is provided that the illumination device has a second sub-device, which is designed for light irradiation in the cooking chamber through a side wall of the muffle. A second optical fiber of the second sub-assembly is arranged outside of the cooking chamber and in an upper region of the side wall of the muffle extending into an opening in the side wall. In contrast to the configuration of the first sub-device, in which quasi a ceiling lighting is designed and thus a light on the ceiling wall is radiated from above into the cooking chamber, a light irradiation in the cooking chamber is provided laterally in the second sub-device. Both subdevices each have their own specific advantages for illuminating the cooking chamber, which stand out in a combination of both sub-devices particularly. Even with circumferentially stocked cooking, for example, with food supports, such as gratings, baking trays or fat pans, then a very extensive and bright illumination of the cooking chamber is possible.

It is preferably provided that a second heat sink of the second sub-device is arranged on the air shaft bottom. This also allows a corresponding cooling effect to be generated at a locally targeted inflow of air into the air guide device in the region of this second heat sink.

It is preferably provided that this second heat sink is designed as a bridge-like strip. By this configuration, it can be selectively and in particular at Brückenabgängen or bridge pillars thermally and mechanically connected to the air shaft bottom, on the other hand, then the arrangement of other components of the lighting device can be provided under the raised bridge middle part, so that they can also be arranged very stable position or fixed position there. This has particular significant advantages when the light source is a light emitting diode and in addition a light guide is provided as in the relationship, the relative position between these two components must be met very precisely in order to minimize light losses. Because even with very small deviations from a preferred position between this light emitting diode and the light guide relatively large coupling losses or Lichtleitverluste occur and then the light emitted from the light guide into the oven light can be greatly reduced. Since high temperatures can occur during operation of the cooking appliance and thus the lighting device is exposed to at least any temperature fluctuations compared to a deactivated operation of the cooking appliance, this positional fixation between the light guide and the light source, in particular the light emitting diode, should also maintain the corresponding temperature fluctuations , This can be achieved in particular by the above-mentioned embodiment.

The light guide preferably forms rod-shaped. It preferably extends through a passage in the holder. In addition, the light guide in particular integrally has a slip protection element, which is designed such that the optical waveguide partially has a cross-sectional shape which is greater than an internal dimension of the implementation of the holder for slipping through the light guide by performing at least in a spatial direction in the cross-sectional plane.

The bushing can be designed to be circumferentially closed in a circumferential direction about a longitudinal axis of the light guide. However, it may be formed circumferentially open and, for example, be designed as a clip or arm-like.

Preferably, the lighting device comprises at least one ductile compensation element, which is arranged on the holder, and on which the anti-slip element is mechanically contacted in the assembled final state of the lighting device, in particular rests or sits on it. By such a plurality of specific geometric and positional embodiments of the light guide, the holder and the additional ductile compensating element, an interaction of the elements is provided by which the light source and the light guide can be arranged positionally fixed relative to each other. As a result, on the one hand, an improved coupling of the light of the light source allows in the light guide and then passed a larger proportion of light on the optical fiber and selectively and selectively radiated again.

This is particularly advantageous in that in cooking devices in operation relatively high temperatures can occur, which can cause a positional change and / or material expansion at least partially acting on corresponding components due to their material composition. The invention counteracts these detrimentally acting effects in applications in which very different environmental conditions, in particular temperature values, can occur.

The rod-shaped configuration of the light guide allows on the one hand in a very compact design a very space-saving arrangement and a corresponding installation. By means of this specific anti-slip element, unwanted axial slippage in the holder is then avoided, especially on such a rod-shaped and thus preferably completely rectilinear configuration of the light guide, on the other hand the lead completely surrounds the light guide at least in sections over its entire length and then already by this design improved mounting of the light guide is achieved. Due to the additional additional separate ductile compensation element, which is then also specifically positioned, a more precise compliance with the position of the light guide is permanently possible. Due to the ductility of this compensating element and thus the corresponding deformation property hereby also provided an element which favors a position fixation by this property, so that a full rich fit and a corresponding contact between the compensation element and the light guide is achieved on the one hand, and on the other hand due to the material property the compensating element with appropriate compression then a force acting against the compression direction of the light guide is affected, so that it is then held in this regard in the opposite direction. This is particularly advantageous due to the correspondingly projecting anti-slip element in particular in direct contact with the compensating element. This, because due to the arrangement of the anti-slip element and the compensating element in the axial direction of the light guide then also a certain mesh or an axial Overlap is generated and the above interaction particularly stands out. Especially an axial displacement of the light guide in the holder in undesirable form is thereby prevented in particular, so that an undesirable change in the distance between the light guide and the light source in the axial direction of the light guide is prevented and just set this distance between the light guide and the light source very precise and can be maintained.

It is preferably provided that the anti-slip element is formed on a jacket wall of the light guide. In particular, it is provided here that the anti-slip element is formed on a jacket wall at a distance from the two ends of the rod-shaped optical waveguide. With this configuration, the actual cross section of the light guide, in which then the light is to be passed, not restricted or otherwise impaired. In addition, especially in such a local position of the anti-slip element, this can also be made relatively small and preferably favor the already mentioned axial position assurance to a particular extent.

It is preferably provided that the compensation element has a Shore A hardness between 35 and 60, in particular between 38 and 42, and preferably 40. This value specification of the hardness of this compensating element is especially advantageous in those conditions which it experiences when using a lighting appliance in the use of a cooking appliance. Especially the relatively high temperature fluctuations occurring there during operation of the cooking appliance in comparison to a deactivated cooking appliance require a very robust component with regard to a permanently reliable function, which does not undesirably wear or become brittle in the context or which otherwise quickly becomes functionally impaired.

It is preferably provided that the compensation element is formed in a straight line strand-like or annular. These two specific shapes allow particularly advantageous mounting scenarios on the holder, so that they are on the one hand form specific very simple structure, on the other hand require little space and are easy to install. Furthermore, the compensating element serves as a seal to an air duct of the household appliance, so that in a suction region of the ventilation device of the household appliance no faulty air is sucked out of the switch room.

In order to avoid heat build-up in the vicinity of the light source, the holder is preferably only partially circumferential in the circumferential direction about a longitudinal axis of the light guide.

It is preferably provided that the compensating element comprises elastomer, in particular silicone, in particular completely made of silicone. This material embodiment, in particular in conjunction with the above-mentioned values for a Shore A hardness and / or the specific shape, particularly favor the above-mentioned advantages. According to the invention it is provided that the light source is arranged at a distance from the light guide by a spacer and the spacer is seated on the holder. By such a non-contact or non-contact arrangement of the light source on the facing one end of the light guide is avoided that optionally acting on the light guide temperatures and thus heating of the light guide is also transmitted directly to the light source. This is particularly advantageous when the light source is a light-emitting diode, since it may be more sensitive to temperature compared to other light sources.

In particular, the light source on the spacer non-destructively insoluble, in particular glued, which assembly work is reduced and forgetting the spacer during assembly is excluded.

By the spacer positionally seated on the bracket, a mechanically emphasized connection is also created here, which also allows the mutually supporting and favors the positional fixation of the components to each other. In addition, the holder is in itself a very stable and robust and deformation-resistant component, so that here the contact forces of the spacer can also be easily absorbed.

Preferably, the light source is a light emitting diode. This is both very compact in design and very energy efficient operable.

It is preferably provided that the spacer is formed, at least on the surfaces facing the light source and the light guide, from a light-reflecting material. In particular, it is provided that a light-reflecting layer is applied to these surfaces. This is advantageous in that the light losses of the light emitted by the light source, which then can not be coupled into the light guide, can thus be minimized.

It is preferably provided that the spacer is formed like a bridge. By this shape of the spacer, the mechanical connection and in particular the abutment of the spacer on other components can be improved, and the bridge-like shape can also be another part, for example, the light source, something quasi also extend into the spacer, so that this component, in particular the light source is also protected by the spacer accordingly. In particular, when the light source extends through an opening in a portion of the spacer, which extends between two lateral bridge ends or bridge abutments or Brückenabgängen, it is arranged laterally protected. Since, in such an embodiment, this bridge middle part is arranged such that a kind of hollow area arises quasi between the bridge piers, then the partial lining in or dipping of the component, in particular the light source, is particularly advantageous and corresponding protection is provided.

In an advantageous embodiment, the light source is arranged directly on a heat sink, and thus no circuit carrier between the light source and the heat sink is arranged.

It is preferably provided that the light source is arranged on a circuit carrier and the circuit carrier is in thermal contact with a heat sink of the lighting device. This embodiment is advantageous in that the heat generated during operation of the circuit substrate can be selectively dissipated and here, too, an undesirable increase in temperature, which in turn could have a negative effect on the functionality of the light source, is prevented.

It is preferably provided that the circuit carrier on the heat sink facing the underside has a heat conducting layer, which rests in the assembled state of the lighting device to the heat sink. This configuration improves the heat transfer and thus also the dissipation of the heat from the circuit carrier to the heat sink.

In the context, it is particularly advantageous if the heat-conducting layer is a graphite layer and thus has at least a proportion of graphite. Such a layer can be made relatively thin in terms of improving the heat transfer and is still relatively hard and robust, so that the functionality is permanently maintained.

However, the heat conducting layer may also be a thermal paste or a thermal adhesive tape.

It is preferably provided that the heat sink is formed like a bridge. By this configuration, the assembly of other components, in particular the cooking appliance, facilitated and on the other hand created a quasi relatively thin in itself component, which, however, allows a corresponding heat dissipation effect. In addition, by means of this bridge-type structure of the heat sink, an arrangement of already mentioned components of the lighting device can take place even in the area below a bridge middle part, so that here as well a very compact configuration is again achieved in the overall structure.

It is preferably provided that the heat sink is arranged on a base body, in particular screwed or clipped thereto, and pressed in the mounted end state of the circuit carrier through the heat sink on a first side against a spacer and the light guide through the compensating element on one of the first side opposite second side is pressed against the spacer. This is particularly advantageous with regard to a corresponding "sandwich" -like construction and the force-specific counteracting principles in order to permanently achieve a position-fixed arrangement between the light source and the light guide. This is especially true when different environmental conditions, especially strong temperature fluctuations act on the components. By the named Execution is virtually created a tense structure, but due to partially deformable elements, in particular the compensating element, especially during assembly favors a certain degree of freedom and thus a certain rich together, which then can be maintained accordingly.

It is preferably provided that the heat sink is arranged floatingly mounted on a base body in the assembled final state. This also temperature-induced different expansions of the body can be taken into account and thereby a certain relative movement between said components are made possible. Thereby, the occurrence of undesirable tensile and stress forces on the optical fiber can be avoided and in the context of damage or even breakage of the optical fiber can be prevented, in particular, if it is formed of a glass or glassy material. In this context, it may be provided that this floating mounting of the heat sink on the base body by screwing or clip connections, wherein for this purpose at least one hole in the heat sink or a hole in the body is in particular a slot, so that here a corresponding movement of the fastener, in particular the screw is possible. In addition, it can be provided that in addition to the fastening element, a biasing element is arranged by this screw, which acts in the direction of the screw and thus in particular in the axial direction of the screw. This biasing element may in particular be a spring, in particular a spiral spring. By this configuration, then that force which is required to move the assembly about a plane perpendicular to the screwing and thus also perpendicular to the axis of the screw can be adjusted via this corresponding spring force.

Other embodiments of a bracing are possible.

The biasing member may be carried out in addition to an axis oriented coaxially with the connecting element or fastener oriented longitudinal axis and otherwise. Thus, this can also be achieved, for example, by arcuate arms, which are arranged on the connecting element, in particular integrated, wherein these arcuate arms elastically deformable or especially bendable. This bending takes place when the attachment of the connecting element takes place in the axial direction thereof and thereby the deformation of the arms occurs.

In addition, it can also be provided that this connecting element has a silicone component, which is designed similar to a bellows or meandering perpendicular to the longitudinal axis of the connecting element. The biasing element is also connected in particular each with the heat sink or is due to it.

Furthermore, the invention relates to a cooking appliance with at least one lighting device according to the invention or an advantageous embodiment thereof.

In a preferred embodiment, it is provided that a cooking chamber of the cooking appliance is bounded by walls of a muffle and the lighting device is arranged in an upper region of an outside of a side wall of the muffle facing away from the cooking chamber. The light source is arranged outside the cooking chamber, and the light guide extends over a passage in the side wall in the cooking chamber. This positional arrangement is particularly advantageous on the one hand for the compact design of the cooking appliance and on the other hand for unimpeded irradiation of the light in the cooking chamber and as uniform as possible illumination of the entire cooking chamber.

It is preferably provided that the light guide is suspended from above in the holder and is oriented substantially vertically. Especially in such a positional arrangement, the structure of the lighting device with the anti-slip element and the ductile compensation element is particularly effective with respect to the position fixation.

The cross-sectional shape of the light guide can be square or corner-free. The physical configuration of the light guide can be, for example, a glass or a borosilicate glass or even plastic. The formation of the anti-slip element with the specific area-wise cross-sectional shape of the light guide in the context of a nose-like bulge or an undercut, by a Material removal is generated, be formed. Preferably, this anti-slip element is dome-shaped in its shape, so that it is designed as possible corner-free and edge-free. As a result, the interaction with the ductile compensation element and also the holder is particularly effective with regard to an accurately fitting and permanently position-fixed arrangement. The undercut can also be created by deforming the glass rod of the light guide into a nail-head shape. In order to achieve an unambiguous positioning, in particular one side of the nail head shape is ground off and thus a mounting coding is formed.

It is preferably provided that a distance between the light source and a coupling end of the light guide, which faces the light source, between 0.6 mm and 1.8 mm, in particular between 0.8 mm and 1.2 mm, preferably 1 mm ,

It can be provided that the spacer with the light source and in particular then the circuit carrier is non-destructively non-detachably connected, for example by an adhesive connection.

The heat sink is preferably made of a metallic material, which in particular has a thermal conductivity of greater than or equal to 200 W / mK. The heat sink, for example made of copper or aluminum, formed in an advantageous embodiment. For aluminum, AL99.5 or AlMgSi 0.5 is preferably formed.

The cooking appliance is preferably also designed to carry out a pyrolysis operation in which, as is known, even higher temperatures occur than in a normal preparation operation for preparing food.

The base body on which the heat sink is preferably mounted, in an advantageous embodiment, a component of a ventilation device of the cooking appliance. In this context, the ventilation device preferably comprises an air shaft arranged above the muffle, into which a stream of air displaced by a fan is directed in a targeted manner. It may be provided in the context that the ventilation device is a single-shaft concept. It is preferably provided that the ventilation device has a two-shaft principle. In this case, the air guiding device then comprises a suction shaft section into which the air flow through the Blower is sucked, and a pressure shaft section into which the air is expressed by the blower.

The air guiding device comprises a fan base plate or a ventilation shaft bottom, which is arranged above a top wall of the muffle. Also, a fan is preferably arranged above the muffle, wherein in addition also a fan base plate and the fan covering air duct cover is arranged. To form the two-shaft principle, further components can then be arranged between the fan base plate and the air shaft cover.

Preferably, it is provided that in a relative movement in the two horizontal spatial directions of each between 2 mm and 5 mm, in particular between 3 mm and 4 mm, is possible.

By already explained holding force of the biasing element, in particular the spring force of a spring, the ease and stiffness of this compensation movement is specified.

It is preferably provided that the second heat sink is arranged adjacent to a cooling air inlet of the air shaft bottom. Also, this local situation favors the cooling effect of the second heat sink significantly.

It is preferably provided that the suction shaft section and the pressure shaft section are arranged one above the other at least in regions and are formed or fluidically separated by a partition wall between the air shaft bottom and the air shaft cover. It is thus almost a stacking of Saugschachtabschnitts and the pressure shaft section realized. As a result, a height-direction very compact design of the air guiding device can be achieved and the above-mentioned and explained two-shaft principle can be particularly favored.

It is preferably provided that the fan of the air guiding device is arranged in the air shaft between the pressure shaft section and the suction shaft section.

Fig. 1

eine schematische perspektivische Darstellung eines Ausführungsbeispiels eines erfindungsgemäßen Gargeräts;

Fig. 2

eine perspektivische Darstellung von Teilkomponenten des Gargeräts gemäß Fig. 1 mit der Darstellung eines Ausführungsbeispiels einer erfindungsgemäßen Beleuchtungsvorrichtung;

Fig. 3

eine Explosionsdarstellung eines Ausführungsbeispiels einer erfindungsgemäßen Beleuchtungsvorrichtung;

Fig. 4

eine perspektivische Schnittdarstellung der Beleuchtungsvorrichtung gemäß Fig. 3 im zusammengebauten Endzustand;

Fig. 5

eine Seitenansicht auf einen Teilbereich des Gargeräts gemäß Fig. 1 im Bereich der montierten Beleuchtungsvorrichtung;

Fig. 6

eine Schnittdarstellung eines Teilausschnitts der Ansicht in Fig. 5 in einem ersten positionellen Zustand der Beleuchtungsvorrichtung zu einem Grundkörper;

Fig. 7

eine Schnittdarstellung analog zu Fig. 6 in einem zweiten positionellen Zustand der Beleuchtungsvorrichtung zu dem Grundkörper;

Fig. 8

eine schematische Schnittdarstellung durch ein erstes Ausführungsbeispiel einer Befestigung der Beleuchtungsvorrichtung an dem Grundkörper;

Fig. 9

eine schematische Schnittdarstellung durch eine zweite Ausführungsform einer Befestigung der Beleuchtungsvorrichtung an dem Grundkörper;

Fig. 10

eine schematische Schnittdarstellung durch ein drittes Ausführungsbeispiel einer Befestigung der Beleuchtungsvorrichtung an dem Grundkörper;

Fig. 11

eine schematische Schnittdarstellung des Ausführungsbeispiels des Gargeräts gemäß Fig. 1 in einem oberen Bereich;

Fig. 12

eine Draufsicht auf die Ausführung gemäß Fig. 2;

Fig. 13

eine perspektivische Schnittdarstellung entlang der Schnittlinie XIII-XIII in Fig. 12;

Fig. 14

eine der Darstellung in Fig. 12 entsprechende Draufsicht auf ein weiteres Ausführungsbeispiel eines erfindungsgemäßen Gargeräts; und

Fig. 15

eine perspektivische Ansicht der Ausführung gemäß Fig. 14.

Embodiments of the invention are explained in more detail below with reference to schematic drawings. Show it:

Fig. 1

a schematic perspective view of an embodiment of a cooking appliance according to the invention;

Fig. 2

a perspective view of sub-components of the cooking appliance according to Fig. 1 with the representation of an embodiment of a lighting device according to the invention;

Fig. 3

an exploded view of an embodiment of a lighting device according to the invention;

Fig. 4

a perspective sectional view of the lighting device according to Fig. 3 in the assembled final state;

Fig. 5

a side view of a portion of the cooking appliance according to Fig. 1 in the area of the mounted lighting device;

Fig. 6

a sectional view of a partial section of the view in Fig. 5 in a first positional state of the lighting device to a main body;

Fig. 7

a sectional view analogous to Fig. 6 in a second positional state of the lighting device to the main body;

Fig. 8

a schematic sectional view through a first embodiment of an attachment of the lighting device to the base body;

Fig. 9

a schematic sectional view through a second embodiment of an attachment of the lighting device to the base body;

Fig. 10

a schematic sectional view through a third embodiment of an attachment of the lighting device to the base body;

Fig. 11

a schematic sectional view of the embodiment of the cooking appliance according to Fig. 1 in an upper area;

Fig. 12

a plan view of the embodiment according to Fig. 2 ;

Fig. 13

a perspective sectional view along the section line XIII-XIII in Fig. 12 ;

Fig. 14

one of the illustration in Fig. 12 corresponding plan view of a further embodiment of a cooking appliance according to the invention; and

Fig. 15

a perspective view of the embodiment according to Fig. 14 ,

In the figures, identical or functionally identical elements are provided with the same reference numerals.

In Fig. 1 is shown in a schematic representation of a cooking appliance 1, which is an oven, which preferably also has a pyrolysis function. The cooking appliance 1 may additionally or instead also be a microwave cooking appliance and / or a steam cooking appliance.

The cooking appliance 1 can also have a hob with cooking zones, which in Fig. 1 are not shown in detail.

The cooking appliance 1 comprises a housing 2, in which a muffle 3 is arranged, which defines a cooking chamber 9 with two vertical side walls 4, 5, a ceiling wall 6, a rear wall 7 and a bottom wall 8. On the front side, the muffle 3 has a charging opening, which can be closed by a door 10. In terms of location and configuration, the cooking appliance also includes an operating device 11, which has a display unit 12 and operating elements 13 and 14.

In the Fig. 2 is a perspective view of a view of sub-components of the cooking device 1 is shown. In this connection, the muffle 3 is shown. In addition, an air guiding device 15 is shown, which is arranged in the vertical direction (y-direction) above the muffle 3 and thus also above the ceiling wall 6. By means of this air guiding device 15, for example, during operation of the cooking appliance 1, a cooling air flow is generated, with which components, in particular also components of a lighting device 16, can be cooled. In addition, the door 10 is cooled with a cooling air flow generated by the air guiding device 15.

For this purpose, the air guiding device 15 comprises one or more air ducts, which are formed by corresponding components, in particular a fan base plate or a duct bottom 25, an air duct cover 17 and an optional partition wall between the duct bottom 25 and the duct cover 17, whereby due to the arrangement of a blower 18 of the Air intake device 15 is a suction region formed by a suction channel or a Saugkanalabschnitt and a pressure range by a pressure channel or pressure channel section and thereby a two-well principle or a two-channel principle is realized.

The lighting device 16 is designed to illuminate the cooking chamber 9. It is arranged in the embodiment outside of the cooking chamber 9 and viewed in the vertical direction in an upper region on an outer side 5a of the side wall 5 and it is constructed and arranged on the opposite side and thus on the side wall 4 accordingly a lighting device.

The lighting device 16 comprises at least a first sub-device 16a and at least a second sub-device 16b. The sub-device 16b comprises a light guide 19, which is designed as a rectilinear rod. The light guide 19 opens at a hole in a bulge 20 of the side wall 5 in the cooking chamber 9, so that he can radiate the light into the cooking chamber 9 in this regard.

As from the illustration in Fig. 2 can be seen, the light guide 19 by a holder 21, which has a plate-like support 22 and a hollow body 23, held and secured to the bulge 20.

This holder 21 is preferably formed in a configuration of the cooking device 1 as Mikrowellengargerät preferably also as a microwave trap and made of an electrically conductive material. It is then also electrically connected to the bulge 20 in the context.

As a result, a high microwave density is achieved.

The second sub-device 16b further comprises a strip-shaped heat sink 24, which is shaped like a bridge. The heat sink 24 is attached to the air shaft bottom 25 in the embodiment. Preferably, it is arranged to float in this case, which means that in the mounted end state, a defined relative movement, in particular in the horizontal plane and thus in the x-direction and z-direction is possible. As a result, due to different expansion coefficients of the materials of the fan base plate or the air shaft bottom 25 and the heat sink 24, a relative movement is made possible. By this floating storage is preferably also achieved that no unwanted mechanical forces and stresses on the example of glass, plastic or borosilicate glass formed optical fiber 19 act, so that it does not break. These different expansions of said components occur due to the influence of temperature during operation of the cooking appliance 1.

As from the illustration in Fig. 2 can be seen, the attachment of the second sub-device 16b on the heat sink 24 is successful, in addition to bridge outlets or bridge pillars receptacles for connecting elements or fastening elements 26 and 27 are formed.

To further explain the embodiment with the second sub-device 16b is on Fig. 3 to refer, in which an exploded view of the sub-components is shown.

The light guide 19 has in the context adjacent to its heat sink 24 facing the end 19a, which faces away from the opening into the cooking chamber 9 end, on its shell side 19b a slipping protection element 28. This is integrated and formed integrally with the material of the light guide 19. It is preferably designed so that it is designed as a corner-free dome or hood-like bulge on a side wall of the quadrangular in the embodiment of the rod. It is also located slightly spaced from the end 19a on the shell side.

By means of this slip-through securing element 28, the light guide 19 has a cross-sectional shape in some regions, which is greater than an inside dimension of the bushing 29 in order to prevent the light guide 19 from slipping through a lead-through 29 in a holder 30 at least in one spatial direction in the cross-sectional plane. The holder 30 is designed so that it completely surrounds the light guide 19 circumferentially and the light guide 19 is inserted from above into the holder 30 and mounted.

In addition, the second sub-device 16b comprises a separate ductile compensation element 31, which is formed in the embodiment shown as a straight string-like and in cross-section corner-free element and preferably a silicone cord with a Shore A hardness between 38 and 60.

The holder 30 comprises a deposit area 32, in which the compensation element 31 is inserted and held. This position of the compensating element 31 is adjacent to the bushing 29, so that in the inserted end state of the optical fiber 19 in the holder 30, the anti-slip element 28 contacted directly with the compensating element 31 and rests on this or seated.

In addition, the second sub-device 16b includes a separate component to the other components in the form of a spacer 33, which is also formed in one piece and bridge-like.

The second sub-device 16b further comprises at least one light source 34, which is designed in particular as a light-emitting diode. This light source 34 is arranged on a circuit carrier 35 or a circuit board. On a rear side 35a facing away from the light source 34, a heat-conducting layer 36, in particular a graphite layer, is applied at least in regions, in particular over the whole area. By means of this heat-conducting layer 36, a direct contacting of the circuit carrier 35 with the heat sink 24 in the mounted state is provided, so that the heat dissipation from the circuit carrier 35 to the heat sink 24 is improved.

In addition, in Fig. 3 in number and orientation as well as embodiment only as an example leads 37 for power supply and / or data exchange of the circuit substrate 35 with other electronic components, in particular a control unit provided.

As can also be seen, the components of the second sub-device 16b are arranged in the region of a middle part 38 of the bridge-like heat sink 24 and positioned underneath between said bridge outflows or bridge pillars 39 and 40. As a result, a compact construction and, to a certain extent, a construction of the further components of the lighting device 16 protected by the heat sink 24 can be achieved.

In Fig. 4 is shown in a perspective sectional view of the assembled final state of the lighting device 16. As can be seen, the light source 24 immersed in a receptacle 41 of the spacer 33 and is thereby both positionally held and fixed, on the other hand, arranged protected. In particular, when the spacer 33 is formed on its surfaces facing the light source 34 and / or the light guide 19 with a light-reflecting material, in particular with a reflective layer, this also contributes positively to the maximum light coupling into the light guide 19 of the light source 34th emitted light at. It Moreover, the compensation element 31 compressed by the slip-through protection element 28 is also shown schematically.

As in Fig. 4 can be seen, the spacer 33 sits in the mounted end state on the holder 30, and by the bridge-like configuration is also a certain toothing or meshing in the vertical direction and thus also in the direction of the axis A of the light guide 19 given. As a result, a slipping and Verkippsicherheit or a security against rotation is further improved and increases the position fixation of the individual components.

In particular, the light source 34, in particular via the circuit substrate 35, non-destructively connected non-destructively with the spacer 33, in particular glued. In addition, it is provided that the light source 34 at a distance d, which is measured in the axial direction of the light guide 19, spaced from the light source 34 facing the end 19a of the light guide 19, wherein this distance d is preferably about 1 mm. That exactly this distance is then maintained, in addition to the positional retention of the position of the light guide 19 and the light source 34 to the other components is essential in order to achieve maximum light coupling and then light into the cooking chamber 9 can.

In Fig. 5 is a partial view of a view of the components in Fig. 2 shown in the region of the heat sink 24. In particular, an advantageous embodiment of the floating mounting of the heat sink 24 on the air shaft bottom 25 is shown. As can be seen here, the connecting elements 26 and 27 are additionally surrounded by prestressing elements 42 and 43 or coupled thereto, in which case the preloading elements are, for example, spiral springs oriented with their longitudinal axis parallel or coaxial to the longitudinal axis of the connecting elements 27 and 26. Depending on the spring force of these biasing elements 42 and 43, the stiffness or ease of Relativverschiebungsmöglichkeit between the heat sink 24 and the air shaft bottom 25 is set.

In Fig. 6 is a sectional view of the view in Fig. 5 in the plane of the figure through the connecting element 27 and the heat sink 24 and the biasing member 42 shown.

In this case, a mounting position is shown, in which the connecting element 27 is arranged essentially centrally in a play-related hole 44 of the cooling body 24.

In Fig. 7 In contrast, in a corresponding sectional view, a position shifted thereto is shown, in which case the connecting element 27 is seated off-center in the hole 44.

As from the representations in particular in Fig. 6 and Fig. 7 can be seen, the biasing member 42 is supported on the one hand on a connecting element head 27a and on the other hand on a support plate 45 which is arranged on the heat sink 24 from. This support plate 45 is also movable relative to the heat sink 24, as for example, in Fig. 7 in relation to the representation in Fig. 6 is shown.

In Fig. 8 is a schematic sectional view of a further alternative embodiment for mounting and forming a floating mounting of the heat sink 24 to the base body, in particular the air shaft bottom 25 shown. In contrast to the embodiment according to Fig. 5 to Fig. 7 Here, no spring element is designed as a biasing element, but here are in the axial direction of the longitudinal axis B of the connecting element 27, in particular adjacent or on the connecting element head 27 a movable bent arms 46 formed as a biasing member 42. These are supported on the heat sink 24 and deform during an axial movement of the connecting element 27th

In Fig. 9 is shown in a further schematic representation of an additional embodiment of a floating storage. In this embodiment, a self-flexible and deformable biasing member 42 is formed, which is designed similar to a bellows and is connected to the connecting element 27. In addition, it is connected to the heat sink 24, wherein it as shown in FIG Fig. 9 the edges bounding the hole 44 and engages both on a side facing away from the air shaft bottom 25 top 24 a of the heat sink 24 and on the air shaft bottom 25 facing bottom 24 b of the heat sink 24 and is contacted.

In the plane of the figure, this biasing element 42 is thus also at least partially meander-shaped, and thus thus the relative displacement of the heat sink 24 to the air shaft bottom 25 in a plane perpendicular to the plane of the figure allows.

In Fig. 10 a further embodiment of a floating bearing is shown in a further schematic sectional view, in which case no biasing element 42 is formed and this can be provided in particular, although to a certain extent a relative movement and thus a game in the vertical direction of the plane of the figure and thus along the Axis B can be possible.

At the in Fig. 11 shown schematic sectional view of the cooking appliance 1 is shown in an upper portion of the door 10. The door 10 comprises a door outer panel 10a and at least one inner door panel 10b, which faces the cooking chamber 9 in the closed state of the door 10. A handle 10c is disposed on an outer side of the door outer panel 10a. At least one ventilation duct 10d is formed between the at least two disks 10a and 10b. Through this, a cooling air 10d is sucked by the fan 18 and directed from bottom to top. This occurs in the upper region of the door 10 from an upper door cover 10f, which is also commonly referred to as a top panel, from.

The muffle 3 comprises at the front and thus the door 10 facing a Muffelflansch 3a. The muffle flange 3 a is in particular completely circumferential and thus formed like a frame. In the vertical direction and thus in the y-direction over the muffle 3 and thus also the ceiling wall, an air shaft 48 of the air guiding device 15 is formed. The fan 18 is disposed at a rear end of the air duct 48 in an upwardly raised dome 47. By means of the blower 18, cool air 53 from a device chamber 49 formed above the air shaft 48 in the housing 2, the so-called switch room with the electronics of the operating device in a front control panel 51, is sucked in and blown to a front outlet opening 50 of the air shaft 48. The air shaft 48 is arranged in particular such that this outlet opening 50 is arranged between an upper edge of the door 10 and a lower edge of the control panel 51.

The air duct 48 is not designed as a single air duct, as in Stander technique, but designed as a so-called double air duct. In this embodiment, the air duct 48 includes a suction passage portion and a suction passage portion 48 a, respectively, which extends in the flow direction from the door 10 to the blower 18. With regard to the fluidic position of the fan 18 in the air duct 48, the suction shaft section 48a is therefore formed by the part of the air shaft 48 formed upstream of the fan 18. The air duct 48 further includes a pressure passage section 48b extending downstream of the blower 18 from the blower 18 to the outlet port 50. This suction chute portion 48a and the pressure chute portion 48b are stacked in the y direction and arranged in parallel, with the suction chute portion 48a being formed below the pressure chute portion 48b. For this purpose, the sections 48a and 48b are fluidically separated by the common horizontal partition 48c. The blower 18 facing away from the end of the suction chute section 48a has an opening which is adjacent to an opening 10g, so that the air 10e from the door 10 in the suction chute section 48a by means of the blower 18 is sucked.

The air flow 53 sucked in by the fan 18 from the equipment compartment 49 is directed to the opening 50 via this pressure shaft section 48b. Due to the arrangement of the sections 48a and 48b and the blower 18 and in particular also its operating mode, the cooling air 10e is sucked from the section 48a to the blower 18 and then automatically picked up by the pushing air flow 52 and forwarded to the opening 50th

In Fig. 12 is a plan view of the embodiment according to Fig. 2 shown. In this context, air flows are indicated schematically. In addition, the position of the lighting device 16 is shown with their sub-devices 16a and 16b, in which case a first sub-device 16a, the illumination of the cooking chamber 9 is formed and arranged from above and thus on the top wall 6 ago.

In addition, the position and configuration of the rectangular plate-shaped heat sink 54 of this first part device 16 a is shown, which at the Duct cover 17 rests from above and is in particular mechanically fixed and thermally coupled thereto.

Furthermore, the air flows 53 can be seen, which via the device chamber 49, which represents the switch room, and thus electronics for the operating device, which is to operate on the front panel 51, receives flow.

In addition, in this embodiment of the cooking appliance 1, which is designed without microwave function, the individual design of the air shaft bottom 25 can be seen. On opposite side walls 4 and 5 each have a second sub-device 16b of the lighting device 16 is arranged, in which case the embodiments of these two second sub-devices 16b according to the explanations to FIGS. 3 to 10 are.

When in accordance with the plan view Fig. 12 The right-hand second sub-device 16b is adjacent to an input and thus an air inlet 56a of a channel 56 is formed, said channel 56 is covered by the air shaft bottom 25.

In the illustration according to Fig. 11 In addition, the arrangement of the first sub-device 16a of the lighting device 16 is shown. In the exemplary embodiment, this first subdevice 16a comprises the plate-like heat sink 54 which is arranged on the air shaft cover 17. In the exemplary embodiment, this heat sink 54 comprises a plurality of air inlet holes 54a, via which the air stream 53 passes as cool air from the device chamber 49 into the pressure shaft section 48b or is sucked in. In addition, this first sub-device 16a comprises at least one light source 55 in the form of a light-emitting diode, which is arranged on a circuit carrier which is connected to the heat sink 54. In particular, the light source 55 extends completely within the printing-well section 48b. She is as in Fig. 11 can be seen, even arranged completely outside the cooking chamber 9.

Spaced to the light source 55, a rod-shaped light guide 59 is arranged, which extends in the illustrated embodiment in the pressure shaft section 48b through the suction shaft section 48a to the cooking chamber 9 and irradiates the light of the light source 55 from above into the cooking chamber 9 via an opening in the top wall 6 , Of the Heatsink 54 includes a plurality of such inlets 54a, wherein in Fig. 2 however, for clarity, only a few are identified by the corresponding reference numeral 54a.

Also in the case of the second subdevices 16b, the respective local light source in the form of the at least one light-emitting diode is arranged completely outside the cooking chamber 9, and the respectively emitted light is irradiated into the cooking chamber 9 via the light guides 19 already shown and explained there.

In Fig. 13 is a sectional perspective view of the embodiment according to a perspective sectional view Fig. 12 shown along the section line XIII-XIII. In this case, the embedded or lowered arrangement of the plate or of the heat sink 54 is shown from above in the air duct cover 17. In addition, here again the air flows are symbolically illustrated. In addition, in Fig. 13 as shown in Fig. 11 also shown the air flow 57 in the suction shaft section 48a.

In Fig. 14 is in a further embodiment, a plan view analogous to the representation in Fig. 12 shown in this embodiment of the cooking appliance 1, this is formed with a microwave function and thus represents a Mikrowellengargerät.

In this embodiment, a difference in the air guide device 15 is provided, in which case also the fan base plate or the air shaft bottom 25 is otherwise designed. How to do it in Fig. 14 can be seen, here is not the channel 56 is present, but it is quasi by this fan base plate or the duct floor 25 at the same time the top wall 6 of the muffle 3 is formed, so that here the top wall of the muffle 3 is integrated formed by the air shaft bottom 25. The air duct 56, as in Fig. 12 is shown there when running in Fig. 14 and in Fig. 15 which is a perspective view of the top view Fig. 14 represents formed by the microwave housing. This is realized by the component 58 and in FIGS. 14 and 15 shown.

In the embodiments, the air shaft bottom 25 is thus cooled by the air currents, and by the arrangement and configuration of the heat sink 24 and 54 is also achieved by convection cooling. Furthermore, heat is released from the heat sinks 24 and 54 to the air shaft bottom 25 and thus achieves a conductive effect.

In addition to the plate-like configuration of the heat sink 54 and / or the configuration of the heat sink 24 as a bridge-like strip, a certain rib structure may additionally be formed on the heat sinks 24 and / or 54, thereby enlarging the surface around which it flows.

In addition to the already mentioned graphite plate between the heat sink and the circuit carrier of the light emitting diode, a thermal paste or a thermally conductive adhesive foil may alternatively be arranged there. In addition, in order to be able to continue cooling the critical area of the heat sink, which is represented by the area under the circuit carrier, so-called heat pipes can also be mounted on the heat sink. The heat transported away from a heat pipe can then be delivered in particular to the air shaft bottom 25 and / or the air duct and / or an intermediate rear wall and / or an intermediate floor.

LIST OF REFERENCE NUMBERS

1

Cooking appliance

2

casing

3

muffle

4

Side wall

5

Side wall

6

ceiling wall

7

wall

8th

walls

9

oven

10

door

10a

disc

10b

disc

10c

Handle

10d

ventilation duct

10e

air

10f

door cover

10g

opening

11

operating device

12

display unit

13

operating element

14

operating element

15

Air guiding device

16

lighting device

16a

partial device

16b

partial device

17

Duct cover

18

fan

19

optical fiber

20

body

21

microwave trap

22

 

23 24

heatsink

25

Duct Floor

26, 27

fasteners

27a

Fastener head

28

Slip safety element

29

execution

30

bracket

31

compensation element

32

deposit area

33

spacer

34

light source

35

circuit support

35a

back

36

heat conducting

37

leads

38

midsection

39, 40

bridge abutment

41

admission

42, 43

biasing members

44

hole

45

support plate

46

poor

47

cathedral

48

airshaft

48a

Saugschachtabschnitt

48b

Pressure shaft section

49

Machinery room

50

opening

51

control panel

52

airflow

53

airflows

54

heatsink

54a

inlets

54b

partial devices

55

light source

56

channel

56a

air intake

57

airflow

58

component

59

optical fiber

Claims (12)

1. Cooking device (1) having a cooking compartment (9), which is delimited by walls (4 to 8) of a muffle (3), and having an air guidance apparatus (15), which has at least one air shaft (48) for supplying a flow of cooling air (53) to a lighting apparatus (16) of the cooking device (1) arranged for the purpose of lighting the cooking compartment (9), wherein the air shaft (48) is arranged above the muffle (3) and the air guidance apparatus (15) has an air shaft base (25) and an air shaft cover (17), the lighting apparatus (16) has at least one light source (34, 55) arranged entirely outside of the cooking compartment (9), around which light source the flow of cooling air (53) flows, which is guided out of a cooking compartment (49) embodied above the air shaft cover (17) into a pressure shaft portion (48b) of the air shaft (48), viewed with respect to a position of a fan (18), for flow purposes, in the air guidance apparatus (15), wherein the air guidance apparatus (15) has a suction shaft portion (48a) which is separate from the cooking compartment (49) and is viewed in respect of a position of the fan (18), for flow purposes, in the air guidance apparatus (15), wherein the lighting apparatus (16) has at least one light guide (19, 59), through which the light emitted by the light source (34, 55) can be routed into the cooking compartment (9), characterised in that a first light guide (19, 59) extends in the manner of a rod and extends projecting at least through the suction shaft portion (48a) through an opening in the air shaft base (25), and wherein the light source (34, 55) is arranged at a distance (d), which is calculated in the axial direction of the rod-shaped light guide (19, 59), from an end (19a) of the rod-shaped light guide (19, 59) which faces the light source (34, 55).
2. Cooking device (1) according to claim 1, characterised in that a cooling element (24, 54) of the lighting apparatus (16) is coupled thermally to the air shaft base (25) and/or the air shaft cover (17).
3. Cooking device (1) according to claim 1 or 2, characterised in that the light source (34, 55) is a light-emitting diode.
4. Cooking device (1) according to one of the preceding claims, characterised in that at least one light source (34, 55) extends into the pressure shaft portion (48b).
5. Cooking device (1) according to one of the preceding claims, characterised in that the lighting apparatus (16) has a first parts device (16a), which is embodied to radiate light into the cooking compartment (9) through a ceiling wall (6) of the muffle (3), and a first cooling element (54) of the parts device (16a) is arranged on the air shaft cover (17) and has at least one air passage hole (54a) , through which the flow of cooling air (53) can be introduced from the device compartment (49) into the pressure shaft portion (48b).
6. Cooking device (1) according to claim 5, characterised in that the first cooling element (54) is a plate.
7. Cooking device (1) according to one of claims 1 to 6, characterised in that the lighting device (16) has a second parts device (16b) which is embodied to radiate light into the cooking compartment (9) through a side wall (4, 5) of the muffle (3), and a second light guide (19) of the second parts device (16b) extends outside of the cooking compartment (9) and in an upper region of the side wall (4, 5) of the muffle (3) into an opening in the side wall (4, 5).
8. Cooking device (1) according to claim 7, characterised in that a cooling element (24) of the second parts device (16b) is arranged on the air shaft base (25).
9. Cooking device (1) according to claim 8, characterised in that the second cooling element (24) of the lighting apparatus (16) is embodied as a bridge-type strip.
10. Cooking device (1) according to claim 8 or 9, characterised in that the cooling element (24) is arranged adjacent to a cooling air inlet (56a) of an air duct (56) of the air shaft base (25).
11. Cooking device (1) according to one of the preceding claims, characterised in that the suction shaft portion (48a) and the pressure shaft portion (48b) are arranged at least in regions one above the other and for flow purposes are separated by a dividing wall (48c) between the air shaft base (25) and the air shaft cover (17).
12. Cooking device (1) according to one of the preceding claims, characterised in that the fan (18) of the air guidance apparatus (15) is arranged in the air shaft (48) between the pressure shaft portion (48b) and the suction shaft portion (48a).

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