Cooking appliance and method for operating it

Abstract

Cooking appliance (1) with at least one cooking chamber (2) and at least one door device (3) for closing a loading opening (12) of the cooking chamber, wherein the door device (3) has at least one window device (13) for viewing into the cooking chamber (2), characterized in that the door device (3) comprises at least one privacy screen device (4) with at least two pane elements (14, 24) which are at least partially transparent and can be adjusted relative to one another by at least one adjusting device (5).

Description

The present invention relates to a cooking appliance having at least one cooking chamber and at least one door device for closing a charging opening of the cooking chamber, and to a method for operating such a cooking appliance.Cooking devices are known from the publications DE 23 09 563 B2 and DE 10 2009 045 746 A1.Modern cooking appliances are often intended to be as completely different in their optical appearance from the surrounding furniture fronts and other built-in appliances as possible. A uniform appearance of cooking appliances and furniture fronts generally supports an overall impression of the kitchen that is particularly appealing visually. In particular, the see-through regions in the cooking chamber should not differ as much as possible from the surrounding regions, in order to avoid the impression of a high-contrast, dark window in the cooking chamber. In the case of appliance and furniture fronts with a very dark coloring, this is usually successful satisfactorily, since the unexposed cooking chamber likewise appears dark.However, in cooking devices with a lighter coloring or with stainless steel fronts, there is still a considerable need for improvement. For example, in such cooking appliances, the window to the cooking chamber is often likewise printed with a lighter color. However, since good viewing into the cooking chamber is desired during the cooking processes, as a rule only very limited printing of the see-through region can take place. As a result, the see-through regions in the cooking chamber of lighter built-in devices always differ particularly clearly from their surroundings, so that a uniform appearance is not possible.It is therefore the object of the present invention to enable a reliable view into the cooking chamber and to counteract a disturbance of the overall visual impression through the cooking chamber.This object is achieved by a cooking appliance having the features of claim 1 and by a method for operating a cooking appliance having the features of claim 15. Further advantages and features are evident from the general description of the invention and the description of the exemplary embodiments.The cooking appliance according to the invention has at least one cooking chamber and at least one door device for closing a charging opening of the cooking chamber. The door device has at least one window device for looking into the cooking chamber. The door device comprises at least one visual protection device with at least two pane elements. The pane elements are transparent at least in sections and preferably completely transparent. The disk elements are adjustable relative to one another by at least one adjustment device.The cooking appliance according to the invention has many advantages. A considerable advantage is that at least one visual protection device with at least two adjustable pane elements is provided. Such a visual protection device can cover the view into the cooking chamber, so that the uniform overall appearance of the cooking appliance is not interrupted by the view into the cooking chamber. It is particularly advantageous that the adjustability of the pane elements allows the view to be selectively enabled or restricted or prevented. As a result, the visual protection device enables a reliable view into the cooking chamber. In addition, the external appearance of the cooking appliance can be influenced by the vision protection device, without, however, hindering the inspection into the cooking chamber. This makes it possible to achieve a uniform appearance which is not interrupted by the impression of a dark window in the cooking chamber.A further advantage is that the adjustable pane elements are transparent at least in sections. As a result, the pane elements of the visual protection device not only allow an inspection into the cooking chamber, but can also close it off accordingly, for example for heat insulation. Such pane elements therefore have the advantage that, for example, the glass panes of a door device can be completely or partially replaced by them. In addition, panes are generally already present in the doors of cooking appliances, which can be designed as pane elements with little effort. The term "transparent" is understood in the sense of the present invention to mean, in particular, a material property and thus a transparent material and not, for example, a recess or a hole through which a user can see.It is possible that the pane element comprises opaque regions outside the transparent pane section. In this case, the material of the pane element itself can be opaque there. However, it is also possible to provide printing and / or coatings and / or adhesive bonds in such opaque regions, for example. It is also possible for receiving devices and / or frame devices and / or other devices provided for mounting the pane elements to be mounted in the opaque regions.The adjusting device is preferably operated by motor. It is also possible for the adjusting device to be operable at least partially manually, for example by muscle power. The adjustment device is in particular at least partially automatically controlled. For example, the adjusting device can be controlled as a function of an operating state and / or an operating program. This has the advantage that the user of the visual protection device does not have to pay attention and the viewing is always possible to him during cooking in the cooking chamber. In particular, the adjustment device is operatively connected to at least one control device of the cooking appliance. For example, the adjustment device can be activated when the cooking appliance or an operating function or illumination in the cooking chamber is switched on, so that the view into the cooking chamber is released. The adjusting device can also be configured to be manually controllable. For example, by actuating at least one operating element, the view can be enabled and / or restricted and / or blocked. This has the advantage that the user himself can decide whether he would like to have the cooking chamber visible or concealed behind the visual protection device.The pane elements are manufactured in particular from a glass material and preferably from glass. The disk elements can also be manufactured from a plastic. It is also possible for the disk elements to be manufactured from a ceramic material and / or glass ceramic material. Preferably, a material is used which is stable to the temperatures to be expected during operation of a cooking appliance and in particular during pyrolysis operation. A transparent and transparent material is particularly preferably used.In a particularly preferred development, a grid structure is attached to the pane elements in a transparent pane section. In particular, the grid structures can be aligned with one another by the adjustment of the pane elements. The grid structures are suitable and configured for at least partially restricting and / or at least partially releasing the view into the cooking chamber by the adjustment of the pane elements. Such a configuration has the advantage that the grid is aligned via the adjustment of the pane elements. Thus, only the pane elements need to be adjusted, while the grid structure itself remains stationary on the pane. This allows the design complexity to be reduced and the production to be made considerably more cost-effective. An often complicated adjustment possibility for a visual protection element can be dispensed with. Only one adjustment device for the disk elements has to be provided.A further advantage is moreover that panes and, for example, glass windows that are already present in the door device can be modified by attaching the grid structure to such panes. For the visual protection device presented here, it is sufficient to apply a grid structure to the already transparent pane sections of the pane elements, so that a visual protection with transparent and opaque regions is present. Such a mounting of a grid structure on a transparent pane offers a substantially more cost-effective production than, for example, a complicated, precise recessing of regions in an opaque visual protection.The grid structure is in particular suitable and configured to remain stationary with respect to the pane element. In particular, the position of the grid structure is fixed relative to the disk element carrying the grid structure. The grid structure is in particular opaque. It is also possible for the grid structure to be at least partially opaque. For example, the grid structure can be designed to be milky and / or opaque. The alignment of the grid structures with respect to one another in particular completely restricts the view into the cooking chamber. The window device is in particular completely covered. It is also possible for the window device to be at least partially covered.Particularly preferably, the grid structure has a multiplicity of spaced lines. In particular, the grid structure has a multiplicity of lines running parallel to one another. For example, horizontal and / or vertical and / or oblique lines can be provided. It is also possible for the lines to have a curved course at least in sections. Preferably, the line extends over a substantial part and in particular completely over the transparent pane section of the pane element. For example, the line extends over more than 90% of the transparent pane section. A shorter line and / or at least one interruption is also possible.The grid structure can also have a multiplicity of points and / or rectangles and / or squares and / or other geometric elements. Particularly preferably, the grid structure comprises at least one regular structural element that occurs and preferably a multiplicity of regular structural elements. In particular, the arrangement of the structural elements relative to one another is regular. It is possible for the structural elements to have regularity that can be described by at least one function. The grid structures can also be formed irregularly. It is also possible for the grid structures of the pane elements to have different spacings, for example, so that moire effects for optical configuration can be achieved.Preferably, the distance between the lines corresponds to the thickness of the lines. The distance can also be a multiple of the line thickness. For example, the distance between the lines corresponds to at least 1.25 times, and preferably to one and a half times, the thickness of the lines. Such embodiments have the advantage that, on the one hand, good viewing into the cooking chamber and, on the other hand, good visual protection is ensured. The distance may also correspond to twice or three times the thickness of the lines. Larger and / or smaller distances are also possible. It is also possible that the distance between the lines is smaller than the thickness of the lines.It is preferred that the grid structure is applied as at least one coating to at least one side of the pane elements. By such application as a coating, the grid structure can be produced particularly reliably and cost-effectively. The coating is in particular heat-stable and particularly preferably pyrolysis-resistant. The coating can be applied to the pane elements, for example, by printing, painting, spraying, adhesive bonding and / or other suitable coating methods. It is possible that the grid structure of the pane element has a substantially uniform and in particular uniform coloring. In particular, the coloring of the grid structure at least partially corresponds to a coloring of the cooking appliance. This achieves a particularly uniform optical overall impression. It is possible and preferred for the pane elements to be arranged with the side adjacent to one another on which the grid structure is arranged. By means of such an adjacent orientation, parallax errors can be counteracted in a particularly reliable manner. An arrangement on non-adjacent sides may also be provided.In a further advantageous and preferred embodiment, at least one of the disk elements is designed as an adjusting disk which is movable by means of the adjusting device. In particular, at least one of the disk elements is designed as a rigid fixed disk. In particular, the fixed disk is accommodated immovably on the door device. Because only one of two pane elements is designed to be adjustable, the reliability of the visual protection device is increased and the design complexity is reduced. A rigid fixed disk enables a reliable and stable alignment with respect to the adjustment disk. In addition, only the adjusting disk has to be adjusted during an alignment. Preferably, the adjusting disk is displaceable by means of the adjusting device along an adjusting path predetermined by a guide device. In particular, the adjusting disk is displaceable relative to the rigid fixed disk. The adjustment disk is preferably displaceable in parallel, so that in particular no tilting and / or twisting occurs. It is also possible for a non-parallel displacement or tilting to be provided, so that moire effects for optical configuration can be achieved.The adjustment path comprises in particular at least one stroke of the adjustment disk. In particular, the adjustment path comprises at least one, in particular lateral offset of the adjustment disk. Particularly preferably, the adjustment path extends in the form of a ramp, so that the movement of the adjustment disk simultaneously experiences a stroke and a lateral offset. Such a configuration results in an extended adjustment path for a specific stroke, so that a more precise alignment of the grid structures is achieved. In particular, the adjustment path is formed obliquely to the course of the grid structure. Particularly preferably, the adjustment path is not parallel to the course of the grid structure. Such an adjustment path is provided in particular in the case of a grid structure with a plurality of lines running horizontally in an intended setup position of the cooking appliance. The adjustment path can, however, also run parallel to the grid structure. It is possible that in the case of an obliquely running grid structure, a vertically and / or horizontally running adjustment path is provided.For example, a stroke is provided which corresponds at least to the thickness of the lines and in particular to 1.25 times or 1.5 times or more the line thickness. The stroke may also be less than the thickness of the lines. In particular, the stroke is smaller than the distance of the lines from one another. It is also possible for the stroke to be greater than the distance between the lines. The lateral offset takes place in particular over a length which corresponds to at least twice the stroke. The offset can also have a length which corresponds to 3 times and in particular 5 times the stroke or more. For example, an offset of 10 mm takes place at a stroke of 2 mm. In particular, an adjustment path is provided which has at least 5%, and in particular at least 10%, and preferably at least 20%, of a slope. It is also possible for the adjustment path to have a slope of at least 25% or even 30% or more. It is also possible for a stroke to take place without offset. Only one offset can also be provided.In a particularly advantageous embodiment, the adjustment disk is accommodated on a movable adjustment frame. In particular, the fixed disk is arranged on a rigid fixed frame. Such frames enable a secure reception of the pane elements, in particular if they are made of a glass material. In addition, a good and reliable connection of other components is achieved, such as a sliding section. Particularly preferably, the adjustment frame is mounted displaceably on at least one sliding section. The sliding section is arranged in particular on the fixed frame. For example, the sliding section has at least one sliding surface, for example made of a PTFE material. A linear slide bearing can also be provided. The sliding portion can also be accommodated on the adjusting frame. The fixed frame is fastened in particular to the door device. For example, the fixed frame is arranged on a carrier element of the door device, which is provided for receiving an outer pane and / or an inner pane of the door device.It is possible and preferred that the guide device is arranged partially on the adjustment frame and partially on the fixed frame. It is also possible for the guide device to be arranged completely on the fixed frame and / or on the adjusting frame. In particular, the guide device comprises at least one guide element which is guided in at least one recess. In particular, the guide element is arranged on the adjustment frame and / or on the fixed frame. The recess is preferably arranged on the adjustment frame and / or on the fixed frame. For example, the recess is formed as an elongated hole. The guide element is designed, for example, as a pin or bolt or pin. It is possible for the cutout to have a course which enables the guide element to be guided in the manner of a cam control.The adjusting device has in particular at least one motor drive device. In particular, the drive device comprises at least one electric motor. An electromagnetic or piezoelectric drive and / or a thermocouple is also possible. The drive device is preferably designed as a linear drive. For example, the drive device can comprise a geared motor with a spindle and at least one spindle nut. For example, the spindle nut is fastened to the adjustment frame. The geared motor and / or the spindle are in particular attached to the fixed frame. The spindle nut can also be fastened to the fixed frame and the geared motor and / or the spindle can be fastened to the amplifier frame. A linear drive with at least one toothed rack is also possible. A linear drive with at least one belt device can also be provided.The adjusting device preferably comprises at least one adjusting device for adjusting the orientability of the disk elements with respect to one another. Such an adjusting device is particularly advantageous in order to achieve a particularly precise alignment of the grid structures with respect to one another independently of assembly or production tolerances. For example, the adjusting device is suitable and designed to adjust the adjustment path and in particular the stroke and / or the offset. The adjustment device is also suitable and designed in particular for adjusting the angular position of the adjustment disk in order to adjust the parallelism of the grid structures with respect to one another. The adjusting device can also have at least one end deactivation, which specifies the beginning and / or the end of the adjustment path. The adjusting device is mounted in particular on the fixed frame.In all embodiments, it is preferred that the door device comprises at least one outer pane which is arranged on its outer side. It is also preferred that the door device comprises at least one inner pane that closes off from the cooking chamber. In this case, the pane elements are arranged in particular between the inner pane and the outer pane. This allows a particularly space-saving accommodation of the visual protection device and, in addition, does not adversely affect the insulating effect of the door device. Particularly preferably, the door device is designed as a multi-pane door. In particular, the inner pane and / or the outer pane are accommodated on at least one carrier device. The carrier device is suitable and designed to space the inner pane and the outer pane from one another, so that an intermediate space for receiving the pane elements is created. It is also possible for the inner pane and / or the outer pane to be designed as a pane element with a grid structure. Particularly preferably, an inner and / or outer disk configured in this way is provided as a fixed disk. It is also possible for the inner pane and / or the outer pane to be designed as an adjusting pane. It is also possible for a different pane device of the door device to be formed as a pane element, for example a central pane device. Preferably, such a disk is then designed as a fixed disk. Particularly preferably, the pane elements are formed thinner than the outer pane and / or inner pane of the door device. The pane elements can also be designed to be stronger than the outer pane and / or inner pane of the door device.In an advantageous development, the visual protection device comprises at least one cassette module. The cassette module is suitable and designed in particular for accommodating at least two components of the visual protection device and for permitting modularized installation. The components are preferably mounted at least indirectly and in particular directly on the cash register module. As a result, the installation of the visual protection device in an existing door device is considerably simplified. In addition, the visual protection device can be retrofitted in a particularly inexpensive manner. It can be provided that one or more panes or other components are removed from the door device. In particular, the cassette module comprises at least 2 components of the visual protection device which are taken from a group of components, comprising: pane element, adjusting pane, fixed pane, adjusting frame, fixed frame, guide device, adjusting device, drive device, adjusting device. Particularly preferably, the cassette module comprises at least the adjusting disc and the fixed disc.Preferably, the cassette module is suitable and designed to be installed in an intermediate space between the inner pane and the outer pane of the door device.For example, the cassette module is inserted between the inner and outer panes and fastened to a carrier element of the door device.The method according to the invention serves for operating a cooking appliance having at least one cooking chamber and at least one door device for closing a charging opening of the cooking chamber. The door device has at least one window device for looking into the cooking chamber. In this case, in order to restrict the view into the cooking chamber, at least two pane elements that are transparent at least in sections are adjusted relative to one another.The method according to the invention has the advantage that the view into the cooking chamber can be restricted or released particularly simply and reliably by adjusting the pane elements. By restricting the view into the cooking chamber, the influence of the cooking chamber disturbing the overall optical impression can be prevented.Particularly preferably, grid structures are aligned with one another by the adjustment of the pane elements. In this case, at least one grid structure is respectively arranged in a transparent pane section of the pane elements. By adjusting the pane elements, the grid structures are aligned with respect to one another in particular such that the view into the cooking chamber is at least partially restricted and / or at least partially released. The grid structures and / or the pane elements are preferably configured as described above for the cooking appliance according to the invention.Further advantages and features of the present invention result from the exemplary embodiments which are explained below with reference to the attached figures.The figures show: FIG. 1 shows a cooking appliance according to the invention; FIG. 2 shows a section of a visual protection device in a sectional side view; FIG. 3 shows a detail of a visual protection device in a front view; FIG. 4 shows a detail of a further visual protection device in a front view; FIG. 5 shows a rear view of a door device with a visual protection device; FIG. 6 shows a section of the door device from FIG. 5 in a cut-away perspective view; FIG. 7 shows a part of a visual protection device in an exploded view; FIG. 8 shows another part of a visual protection device in an exploded view; FIG. 9 shows a detail of the door device from FIG. 5 in a perspective view; and FIG. 10 shows an outlined adjustment path.FIG. 1 shows an exemplary embodiment of a cooking appliance 1 according to the invention, which is designed here as an installed appliance. For this purpose, the cooking appliance 1 can be surrounded in the installed state by one or more furniture fronts, which are not illustrated here. The cooking appliance 1 can also be operated according to the method according to the invention.The cooking appliance 1 is equipped with a heatable cooking chamber 2, the charging opening 12 of which can be closed by a door device 3. The door device 3 has a window device 13 for looking into the cooking chamber 2, the door device 3 here having a handle 53. By means of an operating device 11, the cooking appliance 1 can be operated by a user, so that, for example, operating modes and / or program sequences can be set.In order to be able to provide the front region and in particular the door device 3 of the cooking appliance 1 with a uniform overall appearance, a visual protection device 4 is provided. The vision protection device 4 is not arranged in a visible manner in the door device 3 here and is set, for example, such that the view into the cooking chamber 2 is released. The visibility protection device 4 is illustrated in more detail in the following figures.The vision protection device 4 serves to align the area of view through the cooking chamber 2 as far as possible with the surrounding area, for example with the surface of the door device 3 and / or the appliance front and / or the surrounding furniture fronts. This effectively prevents the impression of a dark window. In order that a good view of a product to be cooked located in the cooking chamber 2 is nevertheless possible, the visibility protection device 4 can be switched over by means of an adjustment device 5 between a mode with a restricted view and a mode with a released view of the product to be cooked. For this purpose, the visual protection device 4 has an adjustment device 5, which is coupled, for example, to a control device of the cooking appliance 1. As a result, the view can be enabled, for example, directly upon switching on or in certain operating states.FIG. 2 shows a section of a cut-away side view of the visual protection device 4. two parallel pane elements 14, 24 are provided which are arranged adjacent to one another and are here made of a heat-resistant glass material provided for use in cooking appliances 1. The side surfaces 54 of the disk elements 14, 24 are arranged parallel and adjacent to one another. In this case, a grid structure 6 is applied on the respectively adjacent side 54. The grid structure 6 is formed here as a coating 66, which has been applied, for example, by a printing method. The grid structures 6 are applied in each case in the regions of the pane elements 14, 24 in which transparent pane sections 140, 240 are present. Here, the pane section 140, 240 can extend over the entire pane element 14, 24. However, it is also possible that, in addition to the transparent pane sections 140, 240, opaque regions are also formed on the pane elements 14, 24, for example by further printing and / or by applied fastening means for mounting on the door device 3.The grid structure 6 is formed here from a multiplicity of lines 36 running parallel and spaced apart from one another. For example, in an intended set-up position of the cooking appliance 1, the lines 36 run substantially horizontally or parallel to the appliance underside. However, other arrangements are also possible, for example transversely and / or vertically extending lines 36. The coloring of the grid structures 6 is in particular adapted to the coloring of the appliance front and / or the door device 3 or also to the coloring of the surrounding furniture fronts.The thickness 56 of the lines 36 is 1 mm here. Also possible are thicker or thinner lines. The distance 46 between the lines 36 is 2 mm here. Another advantageous distance 46 is, for example, 1.5 mm. The distance 46 can also be smaller or larger. In the positioning shown here, the lines 36 of the two disk elements 14, 24 are directly opposite one another, so that a view through the free spaces between the lines 36 is particularly well possible.FIG. 3 shows a detail of the visual protection device 4 in a front view. The disk elements 14, 24 are arranged one behind the other and are aligned with respect to one another such that their lines 16, 26 are directly opposite one another. In the view shown here, therefore, only the lines 16 of the front pane element 14 are visible. The distance 46 between the lines 16, 26 makes it possible to see well into a cooking chamber 2 lying behind it.In the lower illustration of FIG. 3, the disc elements 14, 24 are illustrated adjusted relative to one another. In this case, the rear pane element 24 has been displaced in parallel, so that its lines 26 are now arranged essentially centrally between the lines 16 of the front pane elements of the 14. For example, with a line thickness of 1 mm and a distance of 2 mm, a stroke of one of the two grid structures 6 takes place by 1.5 mm. A smaller or larger stroke is also possible. For example, a stroke of 1.25 mm can be provided, in particular with a line thickness of 1 mm and a distance of 1.5 mm. The view into the cooking chamber 2 is now greatly restricted in the case of a view protection device 4 set in this way. Here, a visible region is also provided by way of example between the lines 16, 26 arranged offset with respect to one another. However, it is also possible that when lines 16, 26 are arranged offset from one another, there is no longer any viewing area. A remaining viewing range offers substantial advantages. In particular, a very good view into the cooking chamber 2 can be made possible if the view is to be released and at the same time a particularly homogeneous surface impression of the appliance front can be produced when the vision protection device is activated.FIG. 4 shows an alternative embodiment of the grid structures 6. The other pane element 24 is printed here with a regular pattern of dots. In this case, the left-hand illustration of FIG. 4 shows an adjustment in which the view into the cooking chamber 2 is released. The points of one grid structure 16 overlap with the crossing points of the grid lines of the other grid structure 26 In the right-hand illustration of FIG. 4, the pane elements 14, 24 are set with respect to one another such that the view into the cooking chamber 2 is restricted. For this purpose, the points 16 are arranged centered in the free spaces between the grid lines 26.FIGS. 5 to 9 show an exemplary embodiment of a door device 3 with a visual protection device 4 of a cooking appliance 1 according to the invention. FIG. 5 shows a rear view of a door device 3 with a window device 13 for looking into a cooking chamber 2, a section of the door device 3 being shown in FIG. 6 in a view cut along the line A from FIG. 5. The door device 3 is designed as a multi-pane door and has an outer pane 33, to which 2 opposite carrier elements 21 are fastened. The carrier elements 21 are designed here as profile strips and carry an inner pane 23 which closes off from the cooking chamber 2. an intermediate space 43 is formed between the inner pane 23 and the outer pane 33, in which the visual protection device 4 is arranged, so that it extends over the window device 13.The vision protection device 4 comprises two pane elements 14, 24, one of which is designed as a fixed pane 34 and one as an adjusting pane 44. The fixed disk 34 is accommodated via a fixed frame 340, which comprises a base frame 346, on which the fixed disk 34 is fixedly mounted. In addition, the fixed frame 340 here comprises a cover plate 342, which is fastened to the base frame 346. A profile strip 343 is provided on the cover plate 342 as a cover. In this case, an intermediate space is produced between the base frame 346 and the cover plate 342, which is designed here as a sliding section 341. The sliding portion 341 receives the adjusting frame 440, to which the adjusting disk 44 is fixed.The structure of the fixed disk 34 is shown in more detail in FIG. 7. Between the fixed disk 34 and the base frame 346, a fastening means is provided, which is designed here as an adhesive 354 and, for example, as an adhesive tape. As a result, an inexpensive and reliable reception of the fixed disk 34 on the fixed frame 340 is achieved. Between the fixed disk 34 and the cover plate 342 there is the sliding section 341, in which a sliding element 344 made of, for example, a PTFE material is accommodated here. As a result, a particularly smooth adjustment of the adjustment frame 440 accommodated in the sliding section 341 is achieved.The adjusting disk 44 is shown in more detail in FIG. 8. Here, the disk element 24 provided as the adjusting disk 44 is fastened to the adjusting frame 440 by means of an adhesive 441. On the side of the adjustment frame 440 opposite the adjustment disk 44, a sliding element 442 is attached here, which is made of a PTFE material, for example. As a result, the adjusting frame 440 is mounted in a particularly easy manner with respect to the cover plate 342 of the fixed frame 340.For aligning the grid structures 6, the pane elements 14, 24 are moved by means of an adjustment device 5. The adjusting device 5 here comprises a drive device 7, an adjusting device 8 and a guide device 15. The drive device 7 comprises an electric motor 17 with which a spindle 37 is set in a rotational movement. A spindle nut 47 is mounted on the spindle 37, which nut is fastened to the adjustment frame 440. The motor 17 is attached to the fixed frame in a rotationally fixed manner by means of a motor holder 27 and is screwed here, for example, to the cover plate 342. As a result, the rotational movement of the motor 17 is converted into a linear movement of the spindle nut 47, with the result that the adjustment frame 440 together with the adjustment disc 44 is displaced.The movement of the adjusting disk 44 takes place along an adjusting path 150 predetermined by the guide device 15. This achieves a particularly precise alignment of the grid structures 6. The adjustment path 150 is shown in more detail in FIG. 10. The guide device 15 here comprises a plurality of recesses 25, e.g. elongated holes, and guide elements 35, e.g. pins. A guide element 35 is inserted into an associated recess 25 so that a movement is possible only along the course of the recess 25. In this case, both the fixed frame 340 and the adjusting frame 440 can have recesses 25 and / or guide elements 35.The adjusting frame 440 here comprises, for example, two recesses 25 designed as elongated holes and a guide element 35 designed as a pin. Accordingly, the fixed frame 340 has a recess 25 designed as elongated hole for receiving the guide element 35 of the adjusting frame 440. For one of the two recesses 25 of the adjustment frame 440, the fixed frame 340 has a guide element 35. For the other recess 25, a recess 25 is likewise provided on the fixed frame 340, into which a setting plate 38 of the setting device 8 is inserted.FIG. 9 shows a partially transparent representation of the adjustment plate 38, which is screwed to the fixed frame 340 here via four elongated holes. By this attachment, the adjustment plate 38 can be freely oriented in the circumference of the slots for adjustment. In addition, a guide element 35 is provided on the adjustment plate 38, which extends through the recess 25 in the fixed frame 340 into the recess 25 of the adjustment frame 440. As a result, by positioning the adjustment plate 38, its guide element 35 can be aligned such that the adjustment frame 440 guided above it can be tilted. Thus, an angular adjustment of the adjustment disk 44 is possible via the adjustment plate 38. This enables a particularly precise setting of the parallelism of the lines 16 of the grid structures 6. Thus, a fine adjustment of the adjustment plate 38 can be effected particularly easily via the adjustment screw 48 if the four fastening screws of the adjustment plate 38 are correspondingly loosened.To limit the adjustment path 150, the adjusting device 8 here comprises a final switch-off. For this purpose, two microswitches 18, 28 are provided on the fixed frame 340 here, which are actuated by the guide element 35 of the adjustment frame 440. The microswitches 18, 28 are screwed to the fixed frame 340 via corresponding slots, so that a simple and reliable alignment for adapting the adjustment path can take place. The microswitches 18, 28 are preferably operatively connected to the adjusting device 5 here, so that the drive device 7 can be switched off.FIG. 10 shows the sketch of an exemplary adjustment path 150. The adjustment path 150 comprises a stroke 151 and an offset 152. The adjustment path 150 is preferably designed such that stroke 151 and offset 152 occur simultaneously. For this purpose, the recesses 25 are arranged obliquely on the fixed frame 340 or adjusting frame 440, for example. In addition, the spindle 37 of the drive device 7 is also arranged correspondingly obliquely and aligned parallel to the recess 25. As a result, the linear movement of the drive device 7 is implemented in such a way that both a stroke 151 and an offset 152 of the adjustment disk 44 take place. For example, an adjustment path 150 having a stroke of 2 mm and an offset of 10 mm is provided. A stroke of 1.5 mm or 1.25 mm can also be provided. It is also possible for a greater or smaller stroke to be provided. The offset can also be shorter or longer.The visual protection device 4 shown here comprises a cassette module 400 for modularized mounting of the associated components. The cassette module 400 comprises, for example, the fixed disk 34 and its fixed frame 340 and the adjusting disk 44 and its adjusting frame 440. In addition, the cassette module 400 here comprises the adjusting device 5, the drive device 7 and the adjusting device 8, in particular with the respectively associated components. As a result, the visual protection device 4 presented here can be integrated in a door device 3 in a particularly simple manner. For this purpose, only the cassette module 400 has to be inserted into the door device 3, which is effected, for example, between the outer pane 33 and the inner pane 23. For example, the cassette module 400 is additionally fastened to the door device 3 and, for example, to the carrier elements 21. Finally, by means of the adjusting device 8, an adjustment can be carried out in which the parts do not have to be disassembled. Preferably, a connection of the adjusting device 5 to a control device of the cooking appliance 1 is also provided.List of reference characters1 Cooking appliance 2 Cooking chamber 3 Door device 4 Visual protection device 5 Adjustment device 6 Grid structure 7 Drive device 8 Adjustment device 11 Operating device 12 Charging opening 13 Window device 14 Pane element 15 Guide device 16 Lines 17 Motor 18 Microswitch 21 Carrier element 23 Inner pane 24 Pane element 25 Cutout 26 Lines 27 Motor holder 28 Microswitch 33 Outer pane 34 Fixed pane 35 Guide element 36 Line 37 Spindle 38 Adjustment plate 43 Intermediate space 44 Adjustment pane 46 Distance 47 Spindle nut 48 Adjustment screw 53 Handle 54 Side 56 Thickness 66 Coating 140 Pane section 150 Adjustment path 151 Stroke 152 Offset 240 Pane section 340 Fixed frame 341 Slide section 342 Cover plate 343 Profile strip 344 Slide element 345 Adhesive 346 Base frame 400 Cassette module 440 Adjustment frame 441 Adhesive 442 Slide element

Claims

Cooking appliance (1) having at least one cooking chamber (2) and at least one door device (3) for closing a charging opening (12) of the cooking chamber, wherein the door device (3) has at least one window device (13) for viewing into the cooking chamber (2), characterized in that the door device (3) comprises at least one visual protection device (4) having at least two pane elements (14, 24) which are transparent at least in sections and can be adjusted relative to one another by at least one adjustment device (5).Cooking appliance (1) according to claim 1, characterised in that at least one grid structure (6) is respectively attached to the pane elements (14, 24) in a transparent pane section (140, 240), and in that the grid structures (6) can be aligned with one another by the adjustment of the pane elements (14, 24), so that the view into the cooking chamber (2) can be at least partially restricted and / or at least partially released.Cooking appliance (1) according to the preceding claim, characterized in that the grid structure (6) has a multiplicity of lines (36) which are spaced apart and run parallel to one another.Cooking appliance (1) according to the preceding claim, characterized in that the distance (46) between the lines (36) corresponds to at least one thickness (56) of the lines and in particular to at least one and a half times the thickness (56) of the lines (36).Cooking appliance (1) according to one of the three preceding claims, characterized in that the grid structure (6) is applied as a coating (66) to at least one side (54) of the pane elements (14, 24), and in that the pane elements (14, 24) are arranged adjacent to one another, in particular with their side (54) having the grid structure (6).Cooking appliance (1) according to one of the preceding claims, characterized in that at least one of the pane elements (14, 24) is designed as an adjusting pane (44) which can be moved by means of the adjusting device (5), and in that at least one of the pane elements (14, 24) is designed as a rigid fixed pane (34), and in that the adjusting pane (44) can be displaced by means of the adjusting device (5) along an adjusting path (150) which is predetermined by a guide device (15).Cooking appliance (1) according to the preceding claim, characterized in that the adjustment path (150) comprises a stroke (151) and an offset (152) of the adjustment disc (44).Cooking appliance (1) according to one of the two preceding claims, characterized in that the adjusting disc (44) is accommodated on a movable adjusting frame (440), and in that the fixed disc (34) is arranged on a rigid fixed frame (340), and in that the adjusting frame (440) is displaceably mounted on at least one sliding section (341).Cooking appliance (1) according to the preceding claim and claim 6, characterised in that the guide device (15) is arranged partially on the adjustment frame (440) and partially on the fixed frame (340), and in that the guide device (15) comprises at least one guide element (35) guided in at least one recess (25).Cooking appliance (1) according to one of the preceding claims, characterized in that the adjusting device (5) comprises at least one motor-driven drive device (7).Cooking appliance (1) according to one of the preceding claims, characterized in that the adjusting device (5) has at least one adjusting device (8) for adjusting the orientability of the pane elements (14, 24) with respect to one another.Cooking appliance (1) according to one of the preceding claims, characterized in that the door device (3) comprises at least one outer pane (33) arranged on its outer side and at least one inner pane (23) terminating in the cooking chamber (2), and in that the pane elements (14, 24) are arranged between the inner pane (23) and the outer pane (33).Cooking appliance (1) according to one of the five preceding claims, characterized in that the visual protection device (4) comprises at least one cassette module (400) for modularized mounting of at least two components of the visual protection device (4), wherein the components are taken from a group of components comprising the pane elements (14, 24) and the adjusting pane (44) and the fixed pane (34) and the adjusting frame (440) and the fixed frame (340) and the guide device (15) and the adjusting device (5) and the drive device (7) and the adjusting device (8).Cooking appliance (1) according to the preceding claim, characterized in that the cassette module (400) can be integrated into an intermediate space (43) between the inner pane (23) and the outer pane (33).Method for operating a cooking appliance (1) having at least one cooking chamber (2) and at least one door device (3) for closing a charging opening (12) of the cooking chamber (2), wherein the door device (3) has at least one window device (13) for viewing into the cooking chamber (2), characterized in that, in order to restrict the view into the cooking chamber (2), at least two pane elements (14, 24) which are transparent at least in sections are adjusted with respect to one another.Method according to the preceding claim, characterized in that at least one grid structure (6) is respectively mounted in a transparent pane section (140, 240) of the pane elements (14, 24), and in that the grid structures (6) are aligned with one another by the adjustment of the pane elements (14, 24), so that the view into the cooking chamber (2) is at least partially restricted and / or at least partially released.

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