Classifications

• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
  • H05B6/00—Heating by electric, magnetic or electromagnetic fields
  • H05B6/64—Heating using microwaves
  • H05B6/6426—Aspects relating to the exterior of the microwave heating apparatus, e.g. metal casing, power cord
  • H05B6/6429—Aspects relating to mounting assemblies of wall-mounted microwave ovens
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
  • F24C15/00—Details
  • F24C15/02—Doors specially adapted for stoves or ranges
  • F24C15/027—Doors specially adapted for stoves or ranges located at bottom side of housing

Definitions

• the present invention relates to a cooking appliance, in particular a Hocheinbau- cooking appliance, with at least one a cooking chamber delimiting muffle with a muffle opening, a door to close the muffle opening and controlled by a control device drive means for moving the door.
• the procedure of the bottom door is done in the known devices by turning on or off the drive motor, d. H. in that a certain voltage is applied to or disconnected from the motor.
• the disadvantage here is that the movement characteristics of the bottom door of the operating conditions, eg. B. a payload of the bottom door or friction conditions of the mechanics dependent.
• the bottom door closes more slowly when it is heavier loaded. For an operator, such an uneven movement characteristic is unpleasant.
• the present object is achieved by the cooking appliance having the features of patent claim 1 and the method according to claim 15.
• the cooking appliance in particular a high-installation cooking appliance, but also a cooking appliance with a baking tray, so equipped that the door is movable independently of the load, in particular by appropriate control or regulation of the drive device by the control device.
• the movement of the door is independent, for example, of a payload or a change in the mechanical friction conditions.
• the door is speed-dependent, that is movable with a predetermined travel speed.
• the control unit the power of the drive motor, z. B. by adjusting the motor voltage, so control or regulate that the predetermined travel speed is applied.
• the speed measuring device can measure the speed of the door either directly, z. B. by arrangement on the door, or by indirect determination, for. B. by measuring the speed of a shaft, such as the motor shaft.
• the speed measuring device comprises at least one sensor arranged on a motor shaft of a drive motor of the drive device, in particular a Hall sensor.
• the travel speed can be adjusted by selecting from at least two speed levels, whereby the speed levels can also be fixed at the factory.
• the travel speed at least between a first, lower speed level in the range of 40 mm / s to 55 mm / s, in particular 50 mm / s, and a second speed level in the range of 60 mm / s to 80 mm / s, in particular in the range of 65 mm / s to 75 mm / s, in particular of 65 mm / s, can be switched.
• a preset travel speed corresponds to the lowest speed level.
• the user-defined travel speed can be stored in a non-volatile memory such as a non-volatile memory.
• a non-volatile memory such as a non-volatile memory.
• EEPROM electrically erasable programmable read-only memory
• the (target) traversing speeds are specified by a user. So that the bottom door does not jerk during start-up and / or stopping, it may be favorable if the (nominal) traversing speed is approached or braked with a defined ramp.
• trapping on the door can be detected by monitoring the traversing speed, wherein the trapping protection is advantageously activated only when the setpoint speed of the door has been reached.
• the invention is particularly suitable for high-installation cooking appliances, in which the muffle opening is a bottom-side muffle opening, and the door is a bottom door, which preferably moves linearly.
• 1 is a perspective view of a mounted on a wall Hoch- built-in appliance with lowered bottom door.
• 2 is a perspective view of the high-Einhaugar réelles with closed bottom door.
• FIG. 3 is a perspective view of a housing of the Hoch-Einbaugarêts without the bottom door. 4 shows a schematic side view in a sectional view along the line I-I from FIG. 1 of the wall mounted high-mounted cooking appliance with lowered bottom door;
• 5 shows a front view of another embodiment of a high-installation cooking appliance
• 6 to 11 are diagrams of movements of a floor door under various boundary conditions
• FIGS. 12 and 13 force time profile curves for a floor door.
• 1 shows a high-installation cooking appliance with a housing 1 is shown. The back of the housing 1 is mounted on a wall 2 in the manner of a hanging cabinet.
• a cooking chamber 3 is defined, which can be controlled via a front side in the housing 1 introduced viewing window 4.
• FIG. 4 it can be seen that the cooking space 3 is delimited by a muffle 5, which is provided with a heat-insulating sheath, not shown, and that the muffle 5 has a bottom-side muffle opening 6.
• the muffle opening 6 is closable with a bottom door 7.
• the bottom door 7 is shown lowered, being with its underside in contact with a worktop 8 a kitchen device.
• the bottom door 7 In order to close the cooking chamber 3, the bottom door 7 is in the position shown in FIG. 2, the so-called. "Zero position" to adjust.
• the drive device 9, 10 has a drive motor 9 shown in dashed lines in FIGS. 1, 2 and 4, which is arranged between the muffle 5 and an outer wall of the housing 1.
• the drive motor 9 is arranged in the region of the rear side of the housing 1 and is, as shown in FIGS. 1 or 4, in operative connection with a pair of lifting elements 10, which are connected to the bottom door 7.
• each lifting element 10 is designed as an L-shaped carrier, whose vertical leg extends from the housing-side drive motor 9
• the drive motor 9 can be actuated by means of a control panel 12 and a control circuit 13, which is arranged according to FIGS. 1 and 2 at the front of the bottom door 7.
• the control circuit 13 is located behind the control panel 12 within the bottom door 7.
• the control circuit 13, which here consists of several spatially and functionally separated and communicating via a communication bus circuit boards, provides a central control unit for the Device operation is and controls and / or controls z.
• a heating a method of the bottom door 3, a conversion of user input, a lighting, a pinch protection, a clocking of the radiator 16, 17, 18, 22 and much more.
• FIG. 1 shows that an upper side of the bottom door 7 has a hob 15. Almost the entire surface of the hob 15 is occupied by radiators 16, 17, 18, which are indicated in phantom in Fig. 1.
• the radiator 16, 17 two spaced apart, different sized cooking hob heaters, while the radiator 18 is provided between the two cooking area heaters 16,17 surface heating element, which is the Kochstellen- radiator 16, 17 almost encloses.
• the hotplate heaters 16, 17 define for the user associated cooking zones or hobs; the hotplates radiator 16, 17 together with the surface heater 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 controlled via the control circuit 13.
• the radiators 16, 17, 18 are configured as radiant heaters, which are covered by a glass ceramic plate 19.
• 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 support members 20 for Garguta 21 protrude, as shown in Fig. 4.
• mounting holes not shown
• a glass ceramic plate 19 other - preferably quick-responding - covers can be used, for. B. a thin sheet.
• the high-installation cooking appliance can be switched to a cooking or a bottom heat mode, which will be explained below.
• the cooking surface heaters 16, 17 can be controlled individually by means of control elements 11, which are provided in the control panel 12, via the control circuit 13, while the surface heating element 18 remains out of operation.
• the hotplate mode is executable with the bottom door 7 lowered, as shown in FIG. But it can also be operated with closed cooking chamber 3 with raised floor door 7 in an energy saving function.
• the cooking surface 15 providing the bottom heat has a uniform distribution of the heat output over the surface of the hob 15, although the heating elements 16, 17, 18 have different nominal powers.
• the radiator 16, 17, 18 are not switched by the control circuit 13 to a continuous operation, but the Power supply to the radiators 16, 17, 18 is clocked.
• the different sized nominal heating powers of the radiator 16, 17, 18 are individually reduced so that the radiators 16, 17, 18 provide a uniform over the surface of the hob 15 distribution of the heat output.
• Fig. 4 shows schematically the position of a fan 23, z. B. for generating circulating air in a hot air operation or for supplying fresh air.
• a mounted on an upper side of the muffle 5 Oberhitzemosmaschine 22 is provided, the single-circuit or Geographic Vietnameseig, z. B. with an inner and an outer circle, can be executed.
• another radiator such as a ring heater between the rear wall of the housing 1 and the muffle be present.
• the various operating modes such as, for example, top heat, hot air or Schnellauffilter compassion, by an appropriate activation and adjustment of the heating power of the radiator 16, 17, 18, 22, possibly with activation of the fan 23, are set.
• the adjustment of the heating power can be done by appropriate timing.
• the hob 15 can also be designed differently, for. B. with or without roasting zone, as a pure - one or Moika - warming zone without cooktops and so on.
• the housing 1 has a seal 24 towards the bottom door 7.
• the control panel 12 is arranged mainly at the front of the bottom door 7. There are alternatively other arrangements conceivable, for. B. at the front of the housing 1, divided into different sub-fields and / or partially on side surfaces of the cooking appliance. Further designs are possible.
• the controls 11 are not limited in their design and can, for. B. z. As control knob, toggle switch, pushbuttons and membrane keys include the display elements 14 include z. B. LED, LCD and / or touchscreen displays.
• Fig. 5 is schematically and not to scale a high-mounted cooking appliance shown from the front, in which the bottom door 7 is open on contact with the worktop 8. The closed state is shown in dashed lines.
• each traversing panel 25 comprises two pushbuttons, namely an upper CLOSE button 25a for a bottom door 7 traveling upwards in the closing direction and a lower OPEN button 25b for a bottom door 7 moving downwards in the opening direction.
• the bottom door 7 moves upwards only if the TO buttons 25a of both travel panels 25 are pressed simultaneously at the same time, if possible; also moves the bottom door 7 only by continuous simultaneous pressing of the UP buttons 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.
• shifting panels 26 are mounted on opposite outer sides of the housing 1 with corresponding ZU buttons 26a and UP buttons 26b, as shown in dotted lines.
• the control circuit 13 comprises a memory unit 27 for storing at least one destination or travel position PO, P1, P2, PZ of the bottom door 7, preferably with volatile memory modules, eg. B. DRAMs. If a target position PO, P1, P2, PZ is stored, the bottom door can move independently after pressing one of the keys 25a, 25b or 26a, 26b of the traversing panels 25 and 26 in the set direction until the next target position is reached or one of the keys 25a, 25b or 26a, 26b is again actuated (automatic mode).
• the lowest target position PZ corresponds to the maximum opening, the (zero) position PO to the closed state, and P1 and P2 are freely adjustable intermediate positions.
• Automatic operation and manual operation are not mutually exclusive: by permanently activating the positioning panel (s) 25, 26, the bottom door 7 also moves in manual mode if a target position could be approached in this direction. It can be z. B. a maximum actuation time of the traversing fields 25 and 26, respectively, of the associated keys 25a, 25b and 26a, 26b, are set to activate the automatic mode, z. B. 0.4 seconds.
• a target position PO, P1, P2, PZ may be any position of the bottom door 7 between see and including the zero position PO and the maximum opening position PZ be. However, the maximum stored opening position PZ need not be the position with abutment on the work surface 8. Storing the target position PO, P1, P2, PZ can be achieved with the bottom door 7 at the desired target position PO, P1, P2, PZ, by means of, for example, several seconds (eg two seconds), pressing a confirmation key 28 in FIG Control panel 12 are 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-up of the desired target position PO, P1, P2, PZ to be set is done, for example, by - in this embodiment - ambidextrous operation of the movement panels 25 and 26 and manual method to this position.
• a plurality of target positions PO, P1, P2, PZ can be ein arrivedbar.
• these can be approached successively by actuating the corresponding movement keys 25a, 25b or 26a, 26b.
• the target position (s) are advantageously erasable and / or overwritten.
• only one target position can be stored in the opened state, while the zero position PO is automatically detected and can be approached automatically.
• the zero position PO must be stored in order to be automatically approachable.
• the or a target position P1, P2, PZ opens the bottom door 7 at least about 400 mm to about 540 mm (ie P1-P0, P2-P0, PZ-PO ⁇ 40cm to 54 cm). With this opening dimension the food supports 21 are easy to insert into the support members 20. It is advantageous if the viewing window 4 is mounted approximately at eye level of the user or slightly below, z. B. by means of a template that indicates the dimensions of the cooking appliance.
• the drive motor 9 from FIG. 1 has at least one sensor unit 31, 32 arranged on a motor shaft 30, possibly in front of or behind a transmission, in order to measure a travel path or a position and / or a speed of the bottom door 7.
• the sensor unit may include one or more induction, reverberation, opto, SAW sensors, and so forth.
• two Hall (part) elements 31 offset by 180 ° - so opposite - attached to the motor shaft 30 for easy Weg- and speed measurement here, and a Hallmeßaufillon 32 is fixedly mounted at this area of the motor shaft spaced. If a Hall element 31 then moves past the measuring transducer 32 when the motor shaft 30 rotates, a measuring or sensor signal is generated which is, to a good approximation, digital.
• a speed control can realize the speed, for example via a PWM-controlled power semiconductor.
• the distance measurement is automatically readjusted by initialization in the zero position PO of the bottom door 7 at each startup, so z.
• the drive motor 9 is operated by actuation of both traversing panels 25 and 26, even when the main switch 29 is turned off. Instead of two separate switches per traversing field 25, 26 and a single switch per traversing field is possible, for. 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 is not limited.
• control circuit 13 is flexible and not limited, so it can be several boards, z. B. include a display board, a control board and an elevator board, which are spatially separated.
• a 4 mm opening dimension can be detected by limit switches 33, which deactivate anti-pinch protection when actuated.
• the high-installation cooking appliance can also be designed without a storage unit 27, in which case no automatic operation is possible. This can be for increased operator safety, eg. B. as protection against pinching, be useful.
• the curve is traversed in the direction of the arrow, ie from right to left.
• the downward arrows present above the curve indicate actuations of the control panel 12.
• the movement of the bottom door 7 downwards begins with two-handed operation of the movement panels 25, 26 and the ON-switch 25b and 26b, as indicated by the upper left vertical arrow.
• the ramp R1 is linear here.
• the drive motor 9 is therefore not simply turned on.
• the traversing movement is thus load-independent, in particular independent of the load of the bottom door 7 or changed friction conditions of the mecha- technology.
• An input for this can be the speed of the drive motor 9, the z. B. can be measured by Hall sensors.
• the approach to the bottom plate can be detected by limit switch 33 and / or by monitoring the travel.
• the cooking chamber 3 is not opened, the bottom door 7 so do not proceed from the zero position PO when an opening assurance is active, so if, for example, a certain temperature in the oven, z. B. 425 0 C or 600 0 F, is exceeded or a child safety device is activated.
• the movement of the bottom door 7 upward begins with two-handed operation of the to-switch 25a and 26a, as indicated by the upper left vertical arrow.
• the control circuit 13 detects an approach to the zero position PO and brakes the bottom door 7 in good time before. But instead of using the linear ramp to move straight down to the zero position PO, the speed-dependent control is switched over to control with a defined voltage 4 mm before the zero position PO, that is to say in the case of FIG. H. by supplying the motor 9 with a corresponding voltage. This allows a maximum force development when blocking the drive motor 9 set. 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 travel measurement or additionally or alternatively via the limit switches 33. In the range of PO to PO + 4 mm, it is also possible to dispense with an anti-pinch protection.
• only one of the CLOSE switches 25a, 26a now needs to be actuated for a short time, as indicated by the upper vertical arrow. Then moves the bottom door 7 analogous to Fig. 7, only in the other direction.
• the deceleration ramp for the last 4 mm opening changes from a speed-controlled state into a load- or closing-force-controlled state analogously to the situation from FIG. 8.
• vL 50 mm / s
• 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.
• the force that can be generated by the motor 9 for the method is limited in order to avoid accidents due to excessive clamping (see also FIGS.
• the deviation from the desired speed is detected by the control circuit 13, 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 on only when a corresponding actuation of a movement load field 25, 26 again.
• the Einklemmfall is not triggered by mistake, z. B by a change in payload or a change in the operating characteristics of the mechanics, firstly the anti-trap only be activated when the bottom door 7 has reached its target speed (previously a traversing button 25a, 25b, 26a, 26b released, the bottom door 7 remains immediately secondly, several sensor signals are evaluated, for example averaged.
• Fig. 1 1 shows the Einklemmfall (upper vertical arrow) in the opening process of the bottom door 7 in automatic mode to a target position P1, in which an object between the bottom of the bottom door 7 and the worktop 8 is clamped.
• the Einklemmerkennung can be done via two redundant limit switches, which recognize a - especially non-uniform - relief of the bottom door 7, whereupon the drive motor 9 reverses.
• the maximum permissible force time profile (see FIGS. 12 and 13) is not exceeded.
• FIG. 12 shows a force F in N which can be applied maximally to the bottom door 7 in the trapping case during the process in a closing direction (ie upwards) against the elapsed time t in s as a first force time profile FT1.
• the possible closing force is limited to 100 N, corresponding to approx. 10 kg, for 5 s.
• This is z. B. useful if the motor 9 is up-regulated by the controller 13 to hold 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.
• the maximum force threshold of 100 N can also apply to other traversing situations.
• FIG. 13 shows a force F in N which can be applied to the bottom door 7 in the event of trapping in the process in an opening direction (that is, downwards) against the elapsed time t in s as a second force time profile FT2.
• time intervals and force threshold values of the force time profiles FT1, FT2 can be adapted to the structure and further boundary conditions.

Landscapes

• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Electric Ovens (AREA)
• Electric Stoves And Ranges (AREA)
• Power-Operated Mechanisms For Wings (AREA)
• Baking, Grill, Roasting (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=37067646

Family Applications (1)

Country Status (6)

Citations (3)

Family Cites Families (5)

• 2005
  • 2005-08-17 DE DE102005038878A patent/DE102005038878A1/de not_active Withdrawn
• 2006
  • 2006-07-26 TR TR2019/04480T patent/TR201904480T4/tr unknown
  • 2006-07-26 ES ES06777979T patent/ES2725490T3/es active Active
  • 2006-07-26 WO PCT/EP2006/064668 patent/WO2007020160A1/de active Application Filing
  • 2006-07-26 PL PL06777979T patent/PL1917478T3/pl unknown
  • 2006-07-26 EP EP06777979.3A patent/EP1917478B1/de active Active

Patent Citations (3)

Also Published As

Similar Documents

Legal Events