Cooking appliance

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 (2), wherein the door device (3) has at least one window device (13) with at least one viewing window (23) for looking into the cooking chamber (2), characterized in that the door device (3) comprises at least one viewing protection device (4) with at least one viewing protection element (14) which can be retracted from at least one side into the viewing window (23) by means of at least one motor drive 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.Ga devices are known from the publications DE 23 09 563 B2 and DE 10 2009 046 208 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. 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 comprises at least one cooking chamber and at least one door device for closing a charging opening of the cooking chamber. The door device comprises at least one window device with at least one viewing window for viewing into the cooking chamber. The door device has at least one visual protection device. The vision protection device comprises at least one vision protection element. The visual protection element can be moved from at least one side into the viewing window by means of at least one motor drive 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 one retractable visual protection element is present. By means of such a visual protection device, the view into the cooking chamber can be influenced in such a way that the uniform overall appearance of the cooking appliance is not interrupted by the view into the cooking chamber. The retractable visual protection element is also particularly advantageous, as a result of which the view into the cooking chamber can be selectively enabled or prevented. Such a visual protection element also has the advantage that it allows unimpeded and clear viewing through the viewing window in the open state. In the closed state, the visual protection element offers the advantage that the viewing window can be closed reliably and in a view-tight manner. The motor drive device also makes it particularly convenient and simple for the user to retract the visual protection element. By retracting from one side, the visual protection device can be produced cost-effectively with a manageable design outlay.The drive device is in particular at least partially automatically controlled. For example, the drive device can be controlled as a function of an operating state and / or an operating program. Preferably, the drive device is operatively connected to at least one control device of the cooking appliance. In particular, the visual protection element is retracted into the viewing window when the cooking chamber is not in use. The visual protection element is preferably moved out of the viewing window when an operating function is used with the use of the cooking chamber. In particular, the drive device can be activated when the cooking appliance or an operating function and / or illumination in the cooking chamber is switched on, so that the view into the cooking chamber is enabled. The drive device can also be designed to be manually controllable. For example, by actuating at least one operating element, the view can be enabled and / or prevented. 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.It is possible for the drive device to comprise at least one safety coupling. The safety coupling is designed, for example, as a slip clutch. The safety coupling is in particular suitable and designed to decouple the drive device from a movement of the visual protection element when a threshold value for a specific force and / or torque is exceeded.In a particularly preferred embodiment, the visual protection element can be moved into the viewing window from top to bottom. The terms top and bottom refer to a closed door device and to a cooking appliance set up as intended. Such a retraction from top to bottom has the advantage that the visual protection element is less susceptible to dirt and in particular deposits are avoided. However, it is also possible for the visual protection element to be retractable from bottom to top. The visual protection element can also be retractable laterally into the viewing window. It is also possible for the visual protection element to be retractable into the viewing window from two sides and / or from a plurality of sides.Particularly preferably, the visual protection element is flexible. In particular, the visual protection element is flexible. A flexible visual protection element has the advantage that it can be accommodated in a space-saving manner and can be moved into the viewing window in an inexpensive manner. The visual protection element preferably comprises at least one knitted fabric and / or a woven fabric. The visual protection element can also comprise at least one film. It is also possible for the visual protection element to have a multiplicity of interconnected lamellae. It is possible for the visual protection element to have a substantially uniform and in particular uniform coloring. In particular, the coloring of the visual protection element corresponds at least partially to a coloring of the cooking appliance and preferably to a front region of the cooking appliance. This achieves a particularly uniform optical overall impression.Particularly preferably, the visual protection element is designed to be opaque. Preferably, the visual protection element is also designed to be opaque. It is possible for the visual protection element to have at least one opaque coating for this purpose, which is applied in particular to a carrier material and, for example, to a fabric. The visual protection element can be manufactured at least partially from a textile material and / or at least partially from a plastic material. It is also possible for the visual protection element to be manufactured at least partially from a metallic material; for example, a vapor-deposited metal coating can be provided. The visual protection element can also be translucent at least in sections. For example, a woven fabric with a transparent weave is possible.It is particularly preferred that the visual protection element comprises at least one roller blind device. The visual protection element can also be designed as at least one roller blind device. Such a roller blind device offers a particularly reliable and at the same time cost-effective possibility of influencing the view into the cooking chamber. Particularly preferably, the roller blind device comprises at least one textile planar material which is accommodated on a shaft such that it can be rolled and / or rolled up. It is also possible for the roller blind device to comprise at least one folding device, by means of which the sheet material can be folded in and / or unfolded. The vision protection element can also comprise at least one roller shutter or be designed as such.The drive device comprises at least one movable extension element. In particular, the visual protection element is fastened to the extension element by at least one first side section. For example, the pull-out element comprises at least one elongate profile or is designed as such. The vision protection element is, for example, folded over around the pull-out element and secured with at least one seam. It is also possible for the visual protection element to have at least one adhesive connection for fastening to the extension element. By means of such a movable extension element, the visual protection element can be extended and extended in a particularly uniform and trouble-free manner.The pull-out element is preferably accommodated movably by at least one end section in at least one guide device. Particularly preferably, the pull-out element comprises at least two end sections. In this case, in particular each end section is movably accommodated in a respective guide device. The guide device is in particular designed as at least one elongate guide profile. The guide profile has at least one elongate guide space in which the end section of the drawer element is movable along a predetermined axis. In particular, the end section of the pull-out element is at least partially received in a form-fitting manner in the guide device, so that the end section is prevented from slipping out of the guide device. Such embodiments have the advantage that the retraction and extension of the visual protection element can be carried out in a particularly reliable manner.In a particularly preferred development, the drive device comprises at least one traction drive. The traction mechanism operation can be driven in particular by at least one drive motor. Preferably, an electric motor is provided. Preferably, the pull-out element is fastened to the traction drive. In this case, a coupling element can be provided, which is connected to the traction mechanism drive and which is suitable and designed to be connected to the pull-out element. Such a traction drive offers an inexpensive and permanently reliable possibility of moving the pull-out element. It is also possible for the visual protection element to be fastened directly to the traction drive. The traction drive comprises in particular at least one belt and / or at least one chain. In particular, the traction drive is designed as an endless strand. The traction drive can preferably be driven in at least two directions. For example, the drive motor is suitable and designed to be operated in at least two rotational directions. It is also possible for at least one transmission device to be provided, which converts the direction of rotation of the drive motor into a desired direction of movement of the traction drive.Particularly preferably, the drive device comprises at least two opposing traction drives. In particular, two parallel-driven traction drives are provided. In this case, an end section of the pull-out element is preferably fastened to a traction drive in each case. The two opposing traction drives are suitable and configured in particular for being operated in parallel. In particular, the traction drives can be operated in the same direction and / or at the same rotational speed. Thus, the rotational movement of the drive device can be converted into a vertical stroke of the extraction element in a particularly uncomplicated manner.It is also preferred that the two traction drives run over at least one drive wheel each. The drive wheels are in particular accommodated on a common drive shaft device. In particular, the common drive shaft device is driven by a drive motor. Such a common drive shaft device has the advantage that a particularly synchronous drive of the traction drive is possible and that, in addition, a drive motor is sufficient. The drive wheel is preferably designed as a belt pulley and / or as a sprocket. The drive wheel is in particular fixed in a rotationally fixed manner on the drive shaft device. The drive wheels preferably have a diameter which is matched to a rotational speed of the drive shaft device and to a desired retraction speed of the visual protection element. It is possible here that a rotational speed of the drive motor is transmitted and / or reduced to a desired rotational speed of the drive shaft device by means of at least one transmission device.In particular, the visual protection element is accommodated with at least one second side section on at least one rotatable shaft device. In particular, the second side section of the visual protection element lies opposite the first side section. The shaft device is preferably suitable and designed to receive the visual protection element in a plurality of wraps around it. As a result, the visual protection element can be accommodated in a particularly space-saving manner. The second side section is fastened in particular to the shaft device and, for example, sewn and / or glued. The second side section can also be inserted in a form-fitting and / or force-fitting manner in an undercut of the shaft device.Preferably, the shaft device is rotatable in at least one direction by the drive device. Thus, the unwinding of the visual protection element from the shaft device takes place both via the displacement of the extraction element and by the rotation of the shaft device. It is also possible for the shaft device to have at least one freewheel, so that a rotational movement is possible independently of the drive device. In such a case, the movement of the vision protection device is preferably carried out only by way of the movement of the drawer element. Preferably, at least one traction means roller for receiving the traction means drive is fastened to the shaft device in particular in a rotationally fixed manner. For example, a belt pulley is attached to the shaft device in a rotationally fixed manner. However, it is also possible for the traction means roller for the traction means drive to be introduced on the shaft device with a freewheel.The shaft device preferably comprises at least one prestressing device. The pretensioning device is in particular suitable and designed to be charged by at least one rotational movement of the shaft device in at least one rotational direction. The pretensioning device is preferably suitable and designed to be charged by the viewing protection element being moved into the viewing window. The pretensioning device is preferably also suitable and designed to be unloaded onto the shaft device by the rolling-up of the visual protection element. The charged pretensioning device is suitable and designed in particular for moving the visual protection element out of the viewing window and winding it up. Such a pretensioning device has the advantage that the flexible visual protection element is held under tension and can thus always be retracted or extended taut and free of folds.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 visual protection element is arranged and retractable 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 is created for receiving the visual protection element.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 fastened to the cassette module at least indirectly and in particular directly. 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 two components of the vision protection device, which are taken from a group of components, comprising: vision protection element, roller blind device, guide device, drive device, pull-out element, traction drive, shaft device, pretensioning device, receiving device, base frame, cover frame.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.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 detail of the door device from FIG. 1 in a perspective view cut along the line A; FIG. 3 shows a detail of the door device from FIG. 1 in a perspective view cut along the line B; FIG. 4 shows a detail of the door device from FIG. 1 in a perspective view cut along the line C; FIG. 5 shows a view protection device in an exploded view; and FIG. 6 shows a detail of a visual protection device in a perspective illustration.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 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 with a viewing window 23 for viewing into the cooking chamber 2. the door device 3 has a handle 63 here. 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. The operating device 11 can also be designed to operate the visual protection device 4.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 visual protection device 4 is here partially not arranged in a visible manner in the door device 3 and comprises a visual protection element 14 which can be moved into the viewing window 23 from top to bottom. Here, it is moved by way of example into the viewing window 23 by half.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 when the visual protection element 14 is moved into the viewing window 23. In order to allow a good view of a product to be cooked located in the cooking chamber 2, the visual protection element 14 can be moved out of the viewing window 23 via a motor-driven drive device 5. The visual protection element 14 is here coupled to a control device of the cooking appliance 1. As a result, the view can be enabled directly when switching on or in certain operating states, for example, and can be concealed when switching off the cooking chamber 2.FIGS. 2-6 show an exemplary embodiment of a door device 3 with a view protection device 4 of a cooking appliance according to the invention.The door device 3 is designed as a multi-pane door and has an outer pane 33 here, to which 2 opposite carrier elements 73 are fastened and, for example, glued. The carrier elements 73 are designed here as profile strips and carry an inner pane 43 that closes off from the cooking chamber 2. an intermediate space 53 is formed between the inner pane 43 and the outer pane 33, in which the visual protection device 4 is arranged.The vision protection device 4 here comprises a vision protection element 14 designed as a roller blind device 24, which can be moved via a motor drive device 5. The roller blind device 24 comprises, for example, a textile fabric and is manufactured, for example, from a textile fabric web. The fabric can be coated opaquely. The roller blind device 24 can also be at least partially transparent.The visual protection element 14 is here substantially rectangular and comprises two opposite side sections 141, 142. The first side section 141 is connected to a pull-out element 15, which is designed here as an elongate profile strip. For example, the side portion 141 is bonded to the pull-out member 15. The second side portion 142 is fixed to a shaft means 65. The visual protection element 14 is wound onto the shaft device 65 during retraction. When it is extended into the viewing window 23, the visual protection element 14 is unwound from the shaft device 65.In order to ensure the most parallel possible alignment of the visual protection element 14 with respect to the door device 3 and in particular with respect to the outer pane 33, the visual protection element 14 is guided via a guide aid 26 after leaving the shaft device 65. The guide aid 26 is here designed as a round profile rod, for example.The shaft device 65 is rotatably mounted in a receiving device 7. The receiving device 7 is fastened to the door device 3 and is arranged here, for example, between the two carrier elements 73. For example, the receiving device 7 can be fastened to the carrier elements 73 and / or to the outer pane 33 and / or to the inner pane 43.The receiving device 7 serves to receive the components of the visual protection device 4 and here comprises a base frame 17 and a cover frame 27.The receiving device 7 is designed here as a cassette module 400 for modularized mounting of the associated components. In this case, the vision protection element 14, the pull-out element 15 and the shaft device 65, and the components of the drive device 5, such as the traction means drives 35, 45, the drive shaft device 55 and the drive motor 25, are accommodated on the accommodation device 7. 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 43. For example, the cassette module 400 is additionally fastened to the door device 3 and, for example, to the carrier elements 73. Preferably, a connection to a control device of the cooking appliance 1 is also provided.The pull-out element 15 has two opposite end portions 151, 152. The end sections 151, 152 are received in a guide device 6, so that a substantially parallel displacement of both ends 151, 152 is assisted. The guide device 6 comprises two parallel guide grooves 16 here. the grooves 16 are worked into respectively opposite sides of the receiving device 7. For example, guide rails can also be provided. The pull-out element 15 can also be guided in a free space between the base frame 17 and the cover frame 27.For retracting and extending the visual protection element 14, a motor-driven drive device 5 with a drive motor is provided here. By means of the drive motor 25, two endless traction means drives 35, 45 arranged parallel to one another are set in motion here. The traction drives are designed, for example, as toothed belts. An end section 151, 152 of the pull-out element 15 is fastened to the traction drives 35, 45, respectively. The extension element 15 is displaced parallel by the movement of the traction drives 35, 45, so that the visual protection element 14 fastened to the extension element 15 is correspondingly carried along.In order to keep the visual protection element 14 under tension and to ensure wrinkle-free winding and unwinding, a pretensioning device 650 integrated in the shaft device 65 is provided here. The pretensioning device also serves to compensate for a change in diameter during the winding process up and down. The biasing device 650 includes a spring shaft. The spring shaft of the prestressing device 650 is tensioned or charged, in particular, when the visual protection element 14 is unwound and correspondingly relaxed or discharged when the visual protection element 14 is wound up.The traction drives 35, 45 are driven via a respective drive wheel 350, 450, which are designed here as toothed belt pulleys. The two drive wheels 350, 450 are connected via a common drive shaft device 55 and are arranged on the latter in a rotationally fixed manner. As a result, the driving of both belts can take place via a drive motor 25 and is also always the same for both traction drives 35, 45.The drive of the drive shaft device 55 takes place via a transmission device 75 designed as a toothed transmission. This gear is driven by a gear wheel arranged on a shaft of the drive motor 25 in a rotationally fixed manner. It is possible here for one or two or more gearwheels to be interposed. The drive motor 25 is located here in a lower region of the door device 3 and is fastened to the receiving device 7 and in particular to the base frame 17. Here, the retraction and extension of the visual protection element 14 is preferably effected by a reversal of the direction of rotation of the drive motor 25.The traction drives 35, 45 moreover each run over a roller 351, 451, which is designed here as a toothed belt pulley. The rollers 351, 451 are arranged on the shaft device 65. For example, the rollers 351, 451 can be connected in a rotationally fixed manner to the shaft device 65, so that the latter is set into a rotational movement by the traction drives 35, 45. As a result, the winding and / or unwinding of the visual protection element 14 can take place both by displacing the extraction element 15 and by a rotational movement of the shaft device 65. However, it is also possible for the rollers 351, 451 to be mounted rotatably with respect to the shaft device 65. In such a case, the unwinding or retraction of the visual protection element 14 takes place in particular via the movement of the extraction element 15.List of reference characters1 Cooking appliance 2 Cooking chamber 3 Door device 4 Visual protection device 5 Drive device 6 Guide device 7 Receiving device 11 Operating device 12 Charging opening 13 Window device 14 Visual protection element 15 Pull-out element 16 Guide rail 17 Base frame 23 Viewing window 24 Roller blind device 25 Drive motor 26 Guide aid 27 Cover frame 33 Outer pane 35 Traction drive 43 Inner pane 45 Traction drive 53 Intermediate space 55 Drive shaft device 63 Handle 65 Shaft device 73 Carrier element 75 Transmission device 141 Side portion 142 Side portion 151 End portion 152 End portion 350 Drive wheel 351 Roller 400 Cassette module 450 Drive wheel 451 Roller 650 Pretensioning device

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 (2), wherein the door device (3) has at least one window device (13) having at least one viewing window (23) 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 one visual protection element (14) which can be moved into the viewing window (23) from at least one side by means of at least one motorized drive device (5).Cooking appliance (1) according to claim 1, characterised in that the visual protection element (14) can be moved into the viewing window (23) from top to bottom.Cooking appliance (1) according to one of the preceding claims, characterized in that the visual protection element (14) is of flexible design.Cooking appliance (1) according to one of the preceding claims, characterized in that the visual protection element (14) comprises at least one roller blind device (24).Cooking appliance (1) according to one of the preceding claims, characterized in that the drive device (5) comprises at least one displaceable pull-out element (15), and in that the visual protection element (14) is fastened to the pull-out element (15) by means of at least one first side section (141).Cooking appliance (1) according to the preceding claim, characterised in that the pull-out element (15) is accommodated movably with at least one end section (151) in at least one guide device (6).Cooking appliance (1) according to one of the two preceding claims, characterized in that the drive device (5) comprises at least one traction drive (35) which can be driven by at least one drive motor (25) and to which the pull-out element (15) is fastened.Cooking appliance (1) according to the preceding claim, characterised in that the drive device (5) comprises at least two opposing traction means drives (35, 45), wherein in each case one end section (151, 152) of the pull-out element (15) is fastened to a traction means drive (35, 45).Cooking appliance (1) according to the preceding claim, characterized in that the two traction drives (35, 45) run over in each case at least one drive wheel (350, 450) and in that the drive wheels (350, 450) are accommodated on a common drive shaft device (55).Cooking appliance (1) according to one of the preceding claims, characterized in that the visual protection element (14) is accommodated by at least one second side section (142) on at least one rotatable shaft device (65).Cooking appliance (1) according to the preceding claim, characterized in that the shaft device (65) comprises at least one prestressing device (650), which can be charged by a rotational movement of the shaft device (65) in at least one rotational direction.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 (43) closing off from the cooking chamber (2), and in that the visual protection element (14) is arranged between the inner pane (43) and the outer pane (33).Cooking appliance (1) according to one of the 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 a visual protection element (14) and a roller blind device (24) and a guide device (6) and a drive device (5) and a pull-out element (15) and a traction drive (35, 45) and a shaft device (65) and a pretensioning device (650).Cooking appliance (1) according to the two preceding claims, characterized in that the cassette module (400) can be integrated into an intermediate space (53) between the inner pane (43) and the outer pane (33).

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