DE102006004381A1 - Cooking appliance used especially as a high-level cooking appliance comprises a door that when moved by a drive device produces a speed parameter used as a reference parameter for a cooking function - Google Patents

Abstract

Cooking appliance, especially a high-level cooking appliance, comprises a door that when moved by a drive device produces a speed parameter (vL) used as a reference parameter (vr) for a cooking function. An independent claim is also included for a process for operating a cooking appliance, especially a high-level cooking appliance. Preferred Features: The reference parameter is subsequently used as a criterion for controlling a function of the same movement of the door.

Description

The The present invention relates to a cooking appliance, in particular a high-installation cooking appliance, with at least a cooking space defining muffle having a muffle opening, a door to close the muffle opening and a drive device controlled by a control device for Procedure of the door.

Out DE 102 28 140 A1 a high-installation cooking appliance is known in which pinching of objects on the bottom door can be detected by a plurality of independently operable anti-pinch switch between the bottom door and the muffle frame. In addition, an increase in pressure in a door seal with a hollow profile can be evaluated.

In DE 101 64 239 A1 is described an anti-trap, which is triggered by different tensile forces on the floor door driving traction cables. A torque sensor is also described which detects a load torque on the drive shaft of an electric motor. Tensile force sensors, piezoelectric sensors and deformation or stress / strain sensors are listed as sensors.

DE 102 88 141 A1 also describes an optoelectronic sensor for detecting a pinch case that switches over the amount of reflected light.

adversely is that the described Einklemmerkennungen either relative sluggish (tensile force sensor) or inaccurate or error-prone (Optosensor) are and also need an increased installation effort.

adversely Above all, the detection of pinching in a variation internal parameter of the cooking appliance or external influences if necessary not at all or not working safely. For example, a high load on the door cause that a given travel speed is not reached or only delayed can be. Also a use of the cooking appliance in an area with fluctuating, too high or too low voltage feed can cause short term Deviations occur. Ultimately, aging effects can also of the drive for the door or of guide rails cause that one originally specified travel speed can not be achieved.

adversely is also a control of a closing process for the door, at the moment of reaching of the closed state from a clamp fuse operation, in which a switch or a Function for detecting a pinching state serves to a closing operation for detecting a closing state is switched.

It It is therefore the object of the present invention to provide a fast, simple and exact adaptation of the cooking appliance to changing operating conditions, and preferably a travel speed detection for a cooking device of the above described way of providing.

The This object is achieved by the cooking appliance with the features of the claim 1 and a method according to claim 9 solved.

Prefers becomes a cooking appliance, in particular a high-installation cooking appliance, with at least one one Cooking chamber delimiting muffle, which has a muffle opening, a door to close the muffle opening and a drive device controlled by a control device to move the door, while during a procedure of the door one of the door's procedure dependent Parameter is determined and wherein the determined parameter as Reference parameter for a device function is used.

Thereby can in an advantageous manner an adaptation of the cooking appliance and its functionalities to local Operating conditions or current operating conditions. Considered can be thereby environmental influences as a non-standard operating voltage or a varying Overload on the door as external operating conditions. As internal operating conditions can for example, aging influences of the cooking appliance considered yourself be, for example, an aging drive motor or wearing guide rails for adjusting the door, so that also creeping changes like Friction effects taken into account can be.

Of the Reference parameter is preferably always close as possible approximated to an actual setpoint. In addition to consideration a speed dependent reference parameter this too dependent from others changeable Sizes like be determined a motor current.

Of the Reference parameter can be used below as a criterion for driving a function used in the same movement of the door become. this makes possible Advantageously, a respective adjustment in particular of the travel speed and e.g. an anti-trap, so that e.g. a different one Overload on the door individually for considered the respective travel cycle can be.

The reference parameter can be below also be used as a criterion for later movements of the door. Advantageously, an adjustment of basic parameters or basic parameter ranges can be established during initial startup of the cooking appliance or at intervals during maintenance activities. In addition to a first-time learning of functions thereby an adaptation of such a specific parameter is made possible from time to time, so that even creeping changes, eg. B. the lifting speed due to changing friction conditions are considered.

When the reference parameter can be one of a traversing speed determined reference speed. Determining of the reference parameter is preferred after reaching a constant travel speed. This allows a safe determination of the parameter without load-dependent acceleration effects while an initial one Acceleration phase. The determination of the reference parameter can but also be done after reaching a constant acceleration. this makes possible a particularly early one Determination of the parameter, making this particularly advantageous for the current movement can be used.

The Determining the reference parameter is alternatively via the entire travel path or a part thereof, eg. B. first determined and then conveniently readjusted. Such a procedure offers the advantage, for example Frictional effects of lifting rails and the like particularly safe determine and consider to be able to.

Advantageous can be a pinching condition so dependent determined by the particular reference parameter. This will ensure that safety-relevant functions, such as the detection of a pinching condition even with varying environmental conditions, such as one too high or too low operating voltage, and therefore varying Traversing speeds work correctly.

For determining of the reference parameter are preferably a key, in particular two ambidextrous keys to be operated (eg traversing keys) are pressed. In case of premature Letting go of the keys, it is preferable to determine the reference parameter canceled. Such an approach is useful because premature Cancel the procedure by releasing the traversing buttons or Other keys prevent a reference parameter value from being set is determined due to a faulty traversing operation. conveniently, is then no automatic operation based on the to be determined Parameters or reference parameters possible, eg. B. an automatic Traversing.

To is the cooking appliance, which is in particular a high-installation cooking appliance, but also a cooking appliance with a Baking cart can be, with a speed measuring device to Determining a traversing speed of the door equipped. By the speed measuring device may be a pinching on the door through a monitoring the travel speed can be detected. The movement must be not be rate-controlled, but can be, for example also load dependent over the Motor voltage or the motor current are regulated. advantageously, but also the movement of the door is speed-dependent - so too load independent - controlled or regulated, z. B. over a central control unit.

It is especially for the lock case Cheap, if in addition at least one limit switch is present, which is in the range between muffle opening or frame and door is arranged, wherein an actuation the at least one limit switch the anti-trap device or a first type of anti-trap protection deactivated, ie protective measures completed. This limit switch preferably switches at an opening degree of less than one centimeter, especially in a range of 9-4 mm, which so small is that no household items more can be trapped. When pressed of the at least one limit switch is the door with a defined force - and not more speed controlled - up the muffle opening postponed. Nevertheless, it is advantageously ensured that the door while closing while not reversed unintentionally, but in the case of a suspected pinching an object in the final phase of closing can still reverse.

Especially the case of a non-abrupt premature stopping of the closing movement provides an indication for a pinched child's finger, leaving the door in one such case immediately again in particular to pull out sufficient opening distance open becomes. Such a non-abrupt premature stopping of the closing movement can especially safe by means of monitoring a speed difference value are detected.

to Avoid pinching even smaller objects or however, preferably a child's finger will preferably not completely deactivate provided, but switched to a modified backup.

This speed supported Pinch protection has the advantage that it is comparatively fast responds, accurate input data can be obtained and relatively easy without major design measures can be implemented.

The supervision the traversing speed can be reduced to a traversing speed be directed, which is uncontrolled and therefore not intentionally adjusted becomes. This can be done so that a through the speed measuring device measured value by a fixed or percentage value of one Setpoint deviates. About- or does the deviation fall below a certain threshold value, so a pinch is assumed. For example, a door can not be moved more with the set target speed, because an object prevents them, their speed drops accordingly. This evaluation and monitoring can be done, for example, in a central control device are made, for. B. on suitable Microcontroller.

alternative or additionally can one - usually too fast - temporal change the traversing speed trigger the Einklemmfall when, for example, in the Pinching the door slowed down faster than intended.

Of course they are the values chosen that speed variations through the control process to process the door usually cause no jamming case. In addition, the in the state of Technique described anti-jamming methods are used as a motor current measurement.

It is advantageous if the speed measuring device at least a sensor on a motor shaft of the drive device, in particular a drive motor comprises, by the corresponding sensor signals can be generated upon rotation of the motor shaft. This is a comparatively fast reaction possible. The sensor signals are directly or indirectly a measure of the travel speed the door. Then it is particularly favorable if the at least one sensor is a Hall sensor, the two sensor signals outputs per revolution of the motor shaft. The Hall sensor system is simple install, fast and insensitive. Advantageously, two Hall (part) elements attached to the motor shaft, so that at one Rotation of the motor shaft two signals are output. By temporal Assessment of these signals can determine a speed of the bottom door be, for example, over Comparison tables or a conversion in real time. Preferably is the traversing speed due to a time difference between detected the sensor signals.

to stable speed determination will be conveniently several, in particular more than two, sensor signals evaluated. Also, it is beneficial to if several, in particular more than two, sensor signals averaged become.

Especially It is advantageous if, after detecting the Einklemmfalls the direction of travel the door reverses.

To There may be an anti-trap device which provides the monitoring the Einklemmfalls and / or an implementation of the Einklemmfalls to be performed Takes action. The anti-trap device may be a separate device or be functionally integrated into existing control circuits, z. B. in the central control circuit or in a control board or a Lift board.

It is cheap, if the anti-trap protection or the anti-trap device only can be activated if a travel setpoint, in particular a setpoint speed, the door what is the danger of a false triggering of the Pinch protection reduced.

To the Protection of the door clamped object is advantageously a maximum power time curve through the door not exceeded. The pinching 'on' the door includes a pinch between the door and an outer boundary, z. As the countertop, as well as pinching between the door and muffle frame or housing. For both Cases can be different Kraftzeitkurven be provided.

It is especially for the lock case Cheap, if in addition at least one limit switch is present, which is in the range between muffle opening or frame and door is arranged, wherein an actuation the at least one limit switch the anti-trap device or the anti-trap protection deactivated, ie protective measures exposes. This limit switch typically switches at an opening dimension of 4-9 mm, which so small is that no objects more can be trapped. On the other hand, it ensures that the door while closing not reversed unintentionally. When pressing the at least one Limit switch will be the door with defined force - and no longer speed-controlled - moved to the muffle opening.

The Speed measuring device can also be used for other purposes, like setting the speed of movement of the door. This Alone is not yet known and not suggested.

The Invention is particularly for High built-in cooking appliances suitable in which the muffle opening a bottom-side muffle opening is, and the door a floor door is, which preferably moves linearly.

The invention will be described below with reference to FIG attached schematic figures described in more detail. Show it:

1 a perspective view of a mounted on a wall high installation cooking appliance with lowered bottom door;

2 a perspective view of the high-mounted cooking appliance with locked bottom door;

3 a perspective view of a housing of the Hocheinbau-cooking appliance without the bottom door;

4 a schematic side view in section along the line II 1 the wall-mounted high-installation cooking appliance with lowered bottom door;

5 in front view another embodiment of a high-installation cooking appliance;

6 to 11 Diagrams of movements of a floor door under different boundary conditions;

12 and 13 Force time profile curves for a floor door; and

14 a diagram of a preferred movement movement when pinching a thin object between a bottom door and a muffle.

In the 1 is a high-installation cooking appliance with a housing 1 shown. The back of the case 1 is like a hanging closet on a wall 2 assembled. In the case 1 is a cooking space 3 defined by a front in the housing 1 inserted window 4 can be controlled. In the 4 it can be seen that the cooking space 3 from a muffle 5 is limited, which is provided with a heat-insulating jacket, not shown, and that the muffle 5 a bottom-side muffle opening 6 having. The muffle opening 6 is with a floor door 7 closable. In 1 is the bottom door 7 shown lowered, with its bottom in abutment with a countertop 8th a kitchen equipment is. To the cooking space 3 to close, is the bottom door 7 in the in the 2 shown position, the so-called "zero position" to adjust. For adjustment of the bottom door 7 the high-installation cooking appliance has a drive device 9 . 10 on. The drive device 9 . 10 has one in the 1 . 2 and 4 shown with dashed lines drive motor 9 that between the muffle 5 and an outer wall of the housing 1 is arranged. The drive motor 9 is in the area of the back of the case 1 arranged and stands, as in the 1 or 4 shown in operative connection with a pair of lifting elements 10 that with the bottom door 7 are connected. It is according to the schematic side view of the 4 each lifting element 10 designed as an L-shaped carrier, the vertical leg extending from the housing-side drive motor 9 extends. For adjusting the bottom door 7 can the drive motor 9 with the help of a control panel 12 and a control circuit 13 be operated according to the 1 and 2 front on the bottom door 7 is arranged. As in 4 shown is the control circuit 13 behind the control panel 12 inside the bottom door 7 , The control circuit 13 , which is composed here of several spatially and functionally separate and communicating via a communication bus circuit boards, represents a central control unit for the device operation and controls and / or regulates z. B. a heating, a method of the bottom door 3 , a conversion of user input, lighting, anti-pinch, clocking the radiator 16 . 17 . 18 . 22 and much more.

Of the 1 it can be seen that a top of the bottom door 7 a hob 15 having. Almost the entire surface of the hob 15 is from radiators 16 . 17 . 18 taken in the 1 dash-dotted lines are indicated. In 1 are the radiators 16 . 17 two spaced apart, different sizes cooker heaters, while the radiator 18 one between the two cooking surface radiators 16 . 17 provided surface heating element, which is the stove radiator 16 . 17 almost encloses. The stove radiators 16 . 17 define cooking zones or hobs associated with the user; the stove radiators 16 . 17 together with the surface heating element 18 define a bottom heat zone. The zones may be indicated by a suitable decoration on the surface. The radiators 16 . 17 . 18 are each via the control circuit 13 controllable.

In the embodiment shown, the radiators 16 . 17 . 18 designed as a radiant heater, the glass of a ceramic plate 19 are covered. The glass ceramic plate 19 has approximately the dimensions of the top of the bottom door 7 , The glass ceramic plate 19 is further equipped with mounting holes (not shown), through the base for holding mounting parts 20 for food carriers 21 protrude, as well as in 4 shown. Instead of a glass ceramic plate 19 It is also possible to use other covers, preferably fast-acting covers, e.g. B. a thin sheet.

Using one in the control panel 12 provided operating knob, the high-installation cooking appliance can be switched to a cooking or a bottom heat mode, which are explained below.

In the hob mode, the cooker heaters can 16 . 17 by means of operating elements th 11 in the control panel 12 are provided, via the control circuit 13 be individually controlled while the surface heating element 18 remains out of service. The hob mode is with the bottom door lowered 7 executable as it is in 1 is shown. But you can also with a closed cooking space 3 with raised floor door 7 be operated in an energy saving function.

In the lower heat mode, the control device 13 not just the stove radiators 16 . 17 but also the surface heating element 18 driven.

In order to achieve the most uniform possible tanning of the food during the bottom heat, it is crucial that the cooktop providing the bottom heat 15 one over the surface of the hob 15 even distribution of the heat output has, although the radiator 16 . 17 . 18 have different rated power. Preferably, therefore, the radiator 16 . 17 . 18 from the control circuit 13 not switched to a continuous operation, but the power supply to the radiators 16 . 17 . 18 is clocked. The different sized nominal heating capacities of the radiators 16 . 17 . 18 individually reduced so that the radiator 16 . 17 . 18 one over the surface of the hob 15 provide uniform distribution of the heat output.

4 schematically shows the position of a fan 23 , z. B. for generating circulating air in a hot air operation or for supplying fresh air. In addition, one is on a top of the muffle 5 mounted top heat radiator 22 provided, the single-circuit or mehrkreisig, z. B. with an inner and an outer circle, can be executed. Also can - not shown here for clarity - another radiator as a ring radiator between the rear wall of the housing 1 and the muffle be present. Through the control circuit 13 the various operating modes, such as, for example, top heat, hot air or Schnellaufheizbetrieb, by an appropriate activation and adjustment of the heating power of the radiator 16 . 17 . 18 . 22 , if necessary with activation of the fan 23 to be discontinued. The adjustment of the heating power can be done by appropriate timing. In addition, the hob can 15 be executed differently, for. B. with or without roasting zone, as a pure - one or mehrkreisige - warming zone without cooktops and so on. The housing 1 points to the bottom door 7 a seal 24 on.

The control panel 12 is mainly at the front of the floor door 7 arranged. There are alternatively other arrangements conceivable, for. B. at the front of the housing 1 , divided into different subfields and / or partially on side surfaces of the cooking appliance. Further designs are possible. The controls 11 are not limited in their design and z. B. z. As control knobs, toggle switches, pushbuttons and membrane keys include the display elements 14 include, for. B. LED, LCD and / or touchscreen displays.

In 5 is schematic and not to scale a high-installation cooking appliance shown from the front, in which the bottom door 7 opened on plant with the work surface 8th located. The closed state is shown in dashed lines.

In this embodiment are located on the front of the fixed housing 1 two travel panels 25 , Each movement panel 25 includes two pushbuttons, namely an upper CLOSE pushbutton 25a for an upward in closing direction traversing bottom door 7 and a lower UP button 25b for a bottom door moving in the opening direction 7 , Without automatic operation (see below) moves the bottom door 7 only by continuous simultaneous pressing of the CLOSE-buttons 25a both traversing panels 25 up, if possible; also moves the bottom door 7 only by constantly pressing the UP buttons simultaneously 25b both traversing panels 25 down, if possible (manual operation). Since in manual operation an increased operator attention of the user is given and also both hands are used here, an anti-trap is then optional. In an alternative embodiment, traversing panels are 26 on opposite outer sides of the housing 1 with corresponding CLOSE buttons 26a and UP buttons 26b attached, as shown in dotted lines.

The dot-dashed control circuit 13 that are inside the bottom door 7 behind the control panel 12 is located, switches the drive motor 9 so that the bottom door 7 gently approaches, ie not abrupt by simply hiring the drive motor 9 but by means of a defined ramp.

The control circuit 13 includes in this embodiment a memory unit 27 for storing at least one destination or movement position P0, PE, P1, P2, PZ of the bottom door 7 , preferably with volatile memory devices, eg. B. DRAMs. If a target position P0, P1, P2, PZ is stored, the bottom door can be pressed after pressing one of the keys 25a . 25b respectively. 26a . 26b the movement panels 25 respectively. 26 until the next target position has been reached or one of the buttons 25a . 25b respectively. 26a . 26b is pressed again (automatic mode). In this embodiment, the lowest target position PZ corresponds to the maximum opening, the (zero) position P0 to the closed state, and P1 and P2 are freely adjustable intermediate positions. If the last target position for one direction has been reached, manual operation must also be continued if this is possible (ie the last end positions do not correspond to a maximum open or closed final state). Analog must then, if for one direction no target position is stored - which z. B. for an upward movement into the closed position would be the case if only PZ is stored, but not P0, P1, P2 - are driven in this direction in manual mode. If no target position is stored, eg. B. in a new installation or after a power disconnection, no automatic mode is possible. Will the bottom door 7 In particular, in the automatic mode procedure, so an anti-trap protection is preferably activated.

Automatic mode and manual mode are not mutually exclusive: by permanently actuating the positioning panel (s) 25 . 26 drives the bottom door 7 even in manual mode, if a target position could be approached in this direction. It can be z. B. a maximum actuation time of Verfahrfelder 25 respectively. 26 , respectively the corresponding keys 25a . 25b respectively. 26a . 26b , are set to activate the automatic mode, eg. B. 0.4 seconds.

A target position P0, P1, P2, PZ may be any position of the bottom door 7 between and including the zero position P0 and the maximum opening position PZ. However, the maximum stored opening position PZ does not have the position with attachment to the worktop 8th be. Storing the target position P0, P1, P2, PZ can with the bottom door 7 on the desired target position P0, P1, P2, PZ, by means of, for example, a multi-second (eg two-second), pressing a confirmation key 28 in the control panel 12 be performed. Existing optical and / or acoustic signal transmitters which output corresponding signals after storing a target position are not shown for the sake of clarity. A start of the desired target position P0, P1, P2, PZ to be set is done, for example, by - in this embodiment - ambidextrous operation of the movement panels 25 respectively. 26 and manual procedure to this position.

In the storage unit 27 can only one or, as shown in this embodiment, several target positions P0, P1, P2, PZ einspeicherbar. If there are several target positions P0, P1, P2, PZ, these can be successively actuated by actuating the corresponding travel keys 25a . 25b respectively. 26a . 26b approach. Through several target positions P0, P1, P2, PZ, the high-installation cooking appliance can be easily adapted to the desired operating height of multiple users. The target position (s) are advantageously erasable and / or overwritten. In one embodiment, for example, only one target position can be stored in the opened state, while the zero position P0 is automatically recognized and can be approached automatically. Alternatively, the zero position P0 must be stored in order to be automatically approachable.

It is particularly advantageous for ergonomic use if the or a target position P1, P2, PZ the bottom door 7 at least approx. 400 mm to approx. 540 mm (ie P1-P0, P2-P0, PZ-P0 ≥ 40 cm to 54 cm). In this opening dimension are the food support 21 easy in the mounting parts 20 used. It is advantageous if the viewing window 4 is mounted approximately at eye level of the user or something underneath, z. B. by means of a template that indicates the dimensions of the cooking appliance.

Not plotted is an existing power failure override for bridging approx. 1 to 3 s power failure, preferably up to 1.5 s power failure.

The drive motor 9 out 1 has at least one sensor unit 31 . 32 on a motor shaft 30 , possibly in front of or behind a transmission, arranged to a travel or a position and / or a speed of the bottom door 7 to eat. For example, the sensor unit may include one or more induction, reverberation, opto, SAW sensors, and so forth. Here are for easy distance and speed measurement here two Hall (part) elements 31 offset by 180 ° - ie opposite - on the motor shaft 30 attached, and a Hall sensor 32 is fixedly mounted at this area of the motor shaft spaced. Then moves a Hall element 31 upon rotation of the motor shaft 30 at the meter 32 past, a measurement or sensor signal is generated which is, to a good approximation, digital. With (not necessarily) two Hall elements 31 so be with one revolution of the motor shaft 30 two signals are output. By time evaluation of these signals, z. B. their time difference, the speed vL of the bottom door 7 be determined, for example via comparison tables or a real-time conversion in the control circuit 13 , By adding or subtracting the measurement signals can be a travel or a position of the bottom door 7 be determined.

A Speed control can speed over, for example, a Implement PWM-controlled power semiconductors.

For zero point determination, the distance measurement by initialization in the zero position P0 of the bottom door 7 automatically adjusted every time you start up, so that, for example, B. a faulty sensor signal output or recording is not traditional.

The drive motor 9 is by operating both traversing panels 25 respectively. 26 even with the main switch turned off 29 operated.

Instead of two separate switches per traversing field 25 . 26 is also a single switch per traversing possible, z. B. a toggle switch with a neutral position, which switches only under pressure. Other shapes are possible. Also, the nature and arrangement of the controls 28 . 29 of the control panel 12 not limited.

The arrangement and distribution of the control circuit 13 is flexible and not limited, so it can also several boards, z. B. include a display board, a control board and an elevator board, which are spatially separated.

A z. B. 4 mm - Opening size can be adjusted by limit switches 33 be detected, which deactivate an anti-trap protection when actuated. It is possible deactivation of the anti-trap but also for example by counting pulses of the sensor signals upon reaching a count, which corresponds to a closing size of eg 8.6 mm. The deactivation of the anti-trap protection is thereby independent of such mechanical limit switches 33 ,

The high-installation cooking appliance can also without storage unit 27 be executed, in which case no automatic mode is possible.

This can for an increased Operating safety, z. B. as protection against pinching, useful be.

6 shows a diagram, not to scale, of a plot of the travel speed vL of the floor door 7 in mm / s against the position of the bottom door in mm from the zero position P0 for a floor door procedure 7 from the closed state at P0 = 0 mm to PZ = maximum opening at 530 mm here in manual travel mode (ie without automatic motion) and, as indicated by the dotted arrow, stopping the travel movement between P0 and PZ. The curve is traversed in the direction of the arrow, ie from right to left. The downward arrows above the curve indicate operations on the control panel 12 at.

The movement of the floor door 7 down begins with two-handed operation of the traversing panels 25 . 26 or the OPEN switch 25b respectively. 26b as indicated by the upper left vertical arrow. The control circuit 13 regulates the drive motor 9 so that the bottom door 7 gently, ie: with a defined ramp R1, approaching its set speed from here vL = 50 mm / s. The ramp R1 is linear here. The drive motor 9 So it's not just turned on.

The movement is characterized load independent, in particular independent of the load of the bottom door 7 or changed friction conditions of the mechanics. An input for this can be the speed of the drive motor 9 be, the z. B. can be measured by Hall sensors.

After reaching the set speed of vL = 50 mm / s, the bottom door moves 7 constant down until it approaches the maximum opening PZ, which is determined by the maximum design of the floor door 7 or reaching the worktop 8th results. In this figure, it is assumed that the constructive maximum opening PZ is achieved. In this case, the control circuit detects 13 this approach and slows the floor door 7 automatically smoothly, ie with a defined ramp R2, down to PZ. Both ramps R1 and R2 may have other slopes or shapes. The approach to the bottom plate can be achieved by limit switches 33 be recognized and / or by monitoring the travel.

Will one or both of the travel switches 25b . 26b let go, as indicated by the upper left vertical arrow, the bottom door stops 7 without ramp abruptly, as indicated by the dotted arrow. In this mode, it is therefore gently approached, but - except when reaching the end position - abruptly stopped.

The cooking space 3 will not open, the bottom door 7 So do not proceed from the zero position P0 when an opening assurance is active, so if, for example, a certain temperature in the oven, z. B. 425 ° C or 600 ° F, is exceeded or a child safety device is activated.

7 indicates one 6 analog, not true to scale diagram for a method of the bottom door 7 from the closed state to a stored position P1 = 476 mm in automatic travel mode.

In this case, start by momentarily pressing one of the UP switches 25b respectively. 26b as indicated by the upper right vertical arrow, the bottom door 7 to move automatically to position P1. Again, the bottom door 7 gently approached (right ramp) and automatically braked (left ramp). In this embodiment, in automatic mode, it is possible to choose between two fixed target speeds, namely 75 mm / s (dashed line) and 50 mm / s (solid line), the slower speed being particularly favorable for older users. Default, z. B. at delivery, is the slower speed level. It can also be provided more than two speed levels or target speeds; also is a free setting of the setpoint speed (s) by the user conceivable. Conveniently, at least between two speed levels of 50 mm / s and 65 mm / s switchable, z. B. at a device initialization.

8th shows a non-scale diagram for a method of the bottom door 7 from the maximum opening position PZ to the zero position P0, ie in the closed state, in manual mode.

The movement of the floor door 7 upwards starts with two-handed operation of the CLOSE switch 25a respectively. 26a as indicated by the upper left vertical arrow. The control circuit 13 regulates the drive motor 9 so that the bottom door 7 from PZ is approached gently to its target speed of vL = 50 mm / s, and then with this target speed constant (to the right) is moved.

The control circuit 13 detects an approach to the zero position P0 and brakes the bottom door 7 gently in advance. However, instead of using the linear ramp to shift directly down to the zero position P0, the speed-dependent control is switched to control with a defined voltage 4 mm before the zero position P0, ie by supplying the motor 9 with an appropriate voltage. This allows a maximum power development when blocking the drive motor 9 to adjust. This voltage differs depending on the history of the process (payload, friction conditions, etc.). The detection of the 4 mm opening dimension is done via the distance measurement or additionally or alternatively via the limit switches 33 , In the range of P0 to P0 + 4 mm can also be dispensed with a pinch protection.

Will, as in 6 , one or both of the travel switches 25b . 26b let go, as indicated by the upper right vertical arrow, the bottom door stops 7 without ramp abruptly, as indicated by the dotted arrow.

9 shows a non-scale diagram for a method of the bottom door 7 from a stored position P1 = 476 mm in the closed state P0 in automatic travel mode. Unlike the in 8th now shown manual traversing only needs one of the CLOSE-switch 25a . 26a to be actuated briefly, as indicated by the upper vertical arrow. Then the floor door moves 7 analogous to 7 just in the other direction. When approaching the zero position P0, the procedure is analogous to the situation 8th the deceleration ramp for the last 4 mm opening from a speed-controlled state to a load or Schließkraftgesteuerte state.

10 indicates one 8th analogous diagram, in which now at a target speed of vL = 50 mm / s pinching occurs, as indicated by the upper vertical arrow. When pinching, for example, a hand or a pot, etc. between the bottom door 7 and the housing 1 , the speed of the bottom door drops 7 because the object hampers another procedure. The monitoring of the lift speed happens here, for example, by evaluating the sensor signals of the motor shaft, wherein z. B. the time between the measurement signals or pulses is evaluated. Only in the second instance is the motor current monitored, which is a rather slower method. In particular, that is through the engine 9 limits the force that can be generated to the method in order to avoid accidents due to excessive clamping (see also 12 and 13 ). The deviation from the target speed is determined by the control circuit 13 recognized, z. B. by a speed deviation or a temporal change in speed. Then reverses the bottom door, so that the object can be removed; if necessary, a, z. B. acoustic, warning signal issued. The bottom door 7 then moves only when a corresponding actuation of a movement key field 25 . 26 at.

Thus the Einklemmfall is not triggered by mistake, z. B by a change in payload or a change in the running characteristics of the mechanics, firstly, the anti-trap protection can be activated only when the bottom door 7 has reached its target speed (becomes a traversing key before 25a . 25b . 26a . 26b let go, the bottom door remains 7 Immediately), and secondly, several sensor signals may be evaluated, for example, averaged.

11 shows the Einklemmfall (upper vertical arrow) during the opening procedure of the bottom door 7 in automatic mode to a target position P1, where an object between the bottom of the bottom door 7 and the worktop 8th is trapped. In this case, the Einklemmerkennung can be done via two redundant limit switch, the one - especially non-uniform - relief of the bottom door 7 recognize what the drive motor 9 reverses. The maximum permissible force time profile (see 12 and 13 ) is not exceeded.

12 shows a trapped case in the process in a closing direction (ie upwards) maximum to the bottom door 7 applicable force F in N against the elapsed time t in s as a first force time profile FT1.

In case of trapping at t = 0 s, the possible closing force is limited to 100 N, corresponding to approx. 10 kg, for 5 s. This is z. B. useful if the engine 9 from the controller 13 is upshifted to to keep the target speed. This ensures in particular that body parts are not injured. If the floor door is tightened for a maximum of 100 N for 5 s, the maximum force that can be applied is reduced further to 25 N, eg. For 5 seconds. In the following, this level of force can be kept or z. B. continue to be lowered to 0 N. It should be emphasized that this force time profile FT1 indicates only the maximum applicable force, and the actually applied force is usually lower, for. B. if the Einklemmfall of the controller 13 detected, and the bottom door 7 is reversed accordingly after t = 0.5 s, whereupon the applied force of 100 N to z. B. 0 N decreases.

Of the maximum force threshold of 100 N can also be used for further traversing situations be valid.

13 shows a trapped case in the process in an opening direction (ie down) maximum to the bottom door 7 applicable force F in N against the elapsed time t in s as a second force time profile FT2. Here is the drive motor 9 in a first block of t = [0s; 0.5 s] up to 400 N to the bottom door 7 then at t = [0.5 s; 5 s] 150 N and then 25 N.

Of course they are the time intervals and force threshold values of the force time profiles FT1, FT2 adaptable to the structure and other boundary conditions.

14 shows an exemplary procedure for learning functions. During the procedure of the door 7 becomes one of the door's procedure 7 dependent parameter vr determined as a reference parameter. Particularly preferred is a reference speed vr as a reference parameter.

The Determining the parameter takes place in particular after the assembly of a cooking appliance at first startup, to take into account environmental influences at the site to be able to. However, a repeated determination of the Parameters, too, with time changing environmental conditions or also be able to take into account internal features of the cooking appliance. Especially in particular, it is advantageous to teach in such a parameter in every procedure of the door, especially with each lifting of the door, such as one always consider varying load to be able to.

14 shows by way of example a speed profile of a travel speed vL, wherein a speed v in mm / s over a current position P of the door 7 is shown in mm.

So far Figures are available, but these are to be considered as an example.

Starting from an end position PZ, which is a fully opened door 7 corresponds, the door will 7 in the direction of the muffle 5 raised and thereby accelerated. From reaching a lower intermediate position pa is the door 7 move upwards at a constant speed vL.

Depending on the travel speed vL as an example parameter, a further function of the cooking device can be controlled. For example, a trapping condition can be detected if the traversing speed before reaching an upper intermediate position pb, from which the door 7 with a reducing speed against the muffle 5 is moved, a target travel speed vR falls below.

Preferably is used as a criterion for outputting a pinching signal or detecting a pinching condition falling below a permissible limit Minimum speed vS set. In principle, a fault condition but also generally when leaving a speed tolerance range vT be detected, with the speed tolerance range vT also preferably depends is given by the current operating conditions.

In the exemplary process sequence shown, the situation of a pinching condition is sketched in which the travel speed vL decreases before the upper intermediate position pb is reached and falls below the permissible nominal or minimum speed vs, as illustrated by the trapped speed profile. In such a case, the door will 7 preferably accelerated (reversed) in the opposite direction and moved downwards by an opening distance s in order to be able to remove a clamped object, as sketched by means of the exemplary return speed curve v2.

As dependent on a momentary load on the door 7 and / or depending on current external and internal operating conditions for the cooking appliance the achievable constant speed for raising the door 7 may vary, the cooking appliance may not even reach a common permissible minimum speed vS, for functions such as monitoring a pinching condition, preferably such a learned parameter is used as the reference speed vr as the basis as a reference parameter for a target speed to be used vR. Depending on such a reference parameter once determined after assembly of the cooking appliance or at a later time than the parameter to be determined, in particular to be measured Then a permissible minimum speed vS and / or a speed tolerance range vT are individually determined.

The determination of the reference parameter, in particular of the target speed v R, is preferably carried out after reaching the lower intermediate position pa, from which the door 7 is moved upwards at a constant speed. In this case, the determination of the reference speed vr can preferably be carried out on a first route section as a reference route sr, so that a parameter determined via such a reference route sr is already used for the further process of the door 7 can be used upwards.

In principle, however, it is also possible to determine the parameter over a reference distance sr *, which is already in the acceleration range of the door 7 between the end position PZ and the lower intermediate position pa. Such a determination can be carried out advantageously in particular if, apart from an initial starting acceleration and a transition phase to the constant speed, there is a constant acceleration phase.

in principle is the determination of the reference parameter but also about one larger area, if necessary even over the entire travel distance possible. The consideration the entire trajectory, including or excluding Acceleration or deceleration areas can be used in particular for determination of faults or changes the travel conditions (friction, levers, etc.) during normal operation serve. In case of a fault For example, a service signal can be output which to a required lubrication or maintenance of guide rails or a drive module.

When learning parameters such as the reference speed vr as a parameter, a procedure is preferred in which an operator during the duration of the parameter determination over a certain predetermined, in particular initial, stroke distance of the door 7 a key or preferably two keys 25a . 26a must keep pressed. For example, when the door starts up, a user must hold the button (s) for at least 2 seconds, allowing the device to reach the ramp or lower position pa and traverse the reference determination section sr. A premature release of the key (s) means that the reference value vr can not be determined correctly, which, for example, results in that jamming protection based on the travel speed vL is not activated, which in turn does not allow automatic travel operation. Then letting go of the keys leads to a movement stop and cancellation of the parameter determination. In the case of a movement such as a pinch-in state, the determination of a parameter in the case of a disturbance, for example a pinching-in state, is preferably interrupted even in the case of later traversing movements in order not to store any parameter determined from an incorrect traversing movement.

In addition to Determining the reference parameter vr can be this as above also be readjusted by having one or more others Areas on small systematic changes, eg. Due to variable friction or lever ratios, monitored and adjusted. This readjustment is preferably done in the range of a constant setpoint, z. B. in the area of constant Traversing.

One Parameter can in the case of the first time learning in the long term in the Cooking appliance get saved. It makes sense, however, such a parameter updated from time to time or even at every movement, about changing Operating conditions.

1

casing

2

wall

3

oven

4

window

5

muffle

6

muffle opening

7

bottom door

8th

countertop

9

drive motor

10

lifting

11

operating element

12

Control panel

13

control circuit

14

indicators

15

hob

16

Hotplate heating elements

17

Hotplate heating elements

18

Panel heater

19

Glass ceramic plate

20

supporting member

21

food support

22

Top heat radiator

23

Fan

24

poetry

25

Verfahrschaltfeld

25a

the travel switches up

25b

the travel switches downward

26

Verfahrschaltfeld

26a

the travel switches up

26b

the travel switches downward

27

storage unit

28

confirmation key

29

main switch

30

motor shaft

31

Hall element

32

sensor

33

limit switch

FT1

first Force-time profile

FT2

second Force-time profile

P

position

pa

lower intermediate position

pb

upper intermediate position

P0

zero position

PZ

end position

PS

changeover

R1

speed ramp

R2

speed ramp

ds

Einklemmsignal

sr, sr *

reference lines

v2

Recovery rate history

vr

reference parameters (Reference speed)

vR

target speed

vS

minimum speed

vT

Speed tolerance

vL

traversing the bottom door

Claims (12)

Cooking appliance, in particular high-installation cooking appliance, with at least - one cooking chamber ( 3 ) narrowing muffle ( 5 ), which has a muffle opening ( 6 ), - a door ( 7 ) for closing the muffle opening ( 6 ) and - one by a control device ( 13 ) controlled drive device ( 9 . 10 ) for moving the door ( 7 ), Wherein during a procedure of the door ( 7 ) one of the procedure of the door ( 7 ) dependent parameter (vL) is determined, characterized in that - the determined parameter (vL) is used as a reference parameter (vr) for a device function. Cooking appliance according to claim 1, characterized in that the reference parameter (vr) below as a criterion for driving a function in the same movement of the door ( 7 ) is used. Method according to Claim 1 or 2, characterized in that the reference parameter (vr) is subsequently used as a criterion for later movements of the door ( 7 ) is used. Cooking appliance according to one of the preceding claims, characterized that as the reference parameter (vr) one from a traversing speed (vL) determined reference speed (vR) is determined. Cooking appliance according to claim 4, characterized in that the determining of Reference parameters (vr) after reaching a substantially constant Traversing speed (vL) is performed. Cooking appliance according to claim 4 or 5, characterized in that the determining of the reference parameter (vr) after reaching a constant acceleration carried out becomes. Cooking appliance according to one of the preceding claims, characterized determining the reference parameter (vr) over the entire travel path is determined. Cooking appliance according to one of the preceding claims, characterized that a pinching condition depends determined by the particular reference parameter (vr). Method for operating a cooking device, in particular a high-installation cooking appliance, having at least - one cooking chamber ( 3 ) narrowing muffle ( 5 ), which has a muffle opening ( 6 ), - a door ( 7 ) for closing the muffle opening ( 6 ) and - one by a control device ( 13 ) controlled drive device ( 9 . 10 ) for moving the door ( 7 ), Wherein during a procedure of the door ( 7 ) one of the procedure of the door ( 7 ) dependent parameter (vL) is determined, characterized in that - the determined parameter (vL) as a reference parameter (vr) for a device function, in particular a anti-trap function is used. A method according to claim 9, characterized in that for determining the reference parameter (vr) a key, in particular two keys ( 25a . 26a ), are to be kept pressed. A method according to claim 10, characterized in that when prematurely releasing the keys ( 25a . 26a ) the determination of the reference parameter (vr) is aborted. Method according to claim 10 or 11, characterized in that when the keys are prematurely released ( 25a . 26a ) before the determination of the reference value (vr) no automatic operation is permitted on the basis of the reference parameter (vr), in particular no movement operation of the door ( 7 ).