EP1929209B1 - Cooking appliance which is mounted in an elevated manner - Google Patents

Description

The invention relates to a high-installation cooking appliance with at least one muffle defining a cooking space with a bottom-side muffle opening, a movable bottom door for closing the muffle opening with at least one heating field at its top, with at least one operating mode for the open state of the bottom door and at least one operating mode for the closed Condition of the bottom door. Furthermore, the invention relates to an associated operating method.

For example DE 100 59 652 A1 Such a high-installation cooking appliance is known in which the heating field of the bottom door can be switched between a hob function and a bottom heat function and with the bottom door closed oven functionalities are available.

Another relevant prior art document represents the font WO 02/44622 ,

A disadvantage of the known designs is that the various functionalities are freely selectable. As a result, a user may accidentally select an operating mode which is unsuitable for the current operating state of the high-mount cooking appliance and may even be insecure, for example functionality with activation of the top heat in the open state of the bottom door or of the cooking chamber.

It is the object of the present invention to provide a way for safer and more effective handling of the cooking appliance.

The present object is achieved by the high-installation cooking appliance according to claim 1 and a method according to claim 7. Advantageous embodiments are the dependent claims individually or in combination removed.

In the generic high-installation cooking appliance only relevant for the opening state of the bottom door mode is activated, so only one mode for the open state with the bottom door open and only one mode for the closed state with the bottom door closed. An open bottom door corresponds to an open cooking space and a closed bottom door to a closed cooking space. Due to this limitation when selecting the activatable operating modes, unsuitable and possibly unsafe operating modes are excluded for the open state (open / closed). The ease of use is also increased.

It may be advantageous if a relevant operating mode can be activated by actuation of a confirmation key, and correspondingly an actuation of a confirmation key for a non-relevant operating mode does not trigger activation of the non-relevant operating mode. The configuration of the confirmation key (single key, multi-function key, toggle, membrane key, etc.) is left to the expert.

An open mode may include a hold, cook or roaster function. A closed state mode may include a hold, cooking, rapid heating, or pyrolysis function.

It is particularly advantageous if only one relevant for the opening state of the bottom door or the cooking chamber operating mode is displayed. For example, the user is only shown these modes when switching the modes by means of a mode selector circuit.

Alternatively, the user can display a control panel relevant for the opening state of the bottom door mode as active, such as. B. with normal brightness, and a non-relevant for the opening state mode as inactive, z. B. by reduced brightness: It can also be provided for the activation of the mode own displays.

• Fig. 1 eine perspektivische Ansicht eines an einer Wand montierten Hoch-Einbaugargeräts mit abgesenkter Bodentür;
• Fig. 2 eine perspektivische Ansicht des Hoch-Einhaugargeräts mit verschlossener Bodentür;
• Fig. 3 eine perspektivische Ansicht eines Gehäuses des Hoch-Einbaugargeräts ohne die Bodentür;
• Fig. 4 eine schematische Seitenansicht in Schnittdarstellung entlang der Linie I-I aus Fig. 1 des an die Wand montierten Hocheinbau-Gargerät mit abgesenkter Bodentür;
• Fig. 5 in Vorderansicht eine weitere Ausführungsform eines Hocheinbau-Gargeräts;
• Fig. 6 eine Ansicht eines Bedienfelds eines Hoch-Einbaugargeräts.

Hereinafter, the high-installation cooking appliance will be described in detail with reference to the accompanying drawings. They show schematically:

• Fig. 1 a perspective view of a wall-mounted Hoch-Einbaugargeräts with lowered bottom door;
• Fig. 2 a perspective view of the high-Einhaugargeräts with closed bottom door;
• Fig. 3 a perspective view of a housing of the Hoch-Einbaugargeräts without the bottom door;
• Fig. 4 a schematic side view in section along the line II Fig. 1 the wall-mounted high-installation cooking appliance with lowered bottom door;
• Fig. 5 in front view another embodiment of a high-installation cooking appliance;
• Fig. 6 a view of a control panel of a Hoch-Einbaugargeräts.

The figures are not drawn to scale to better illustrate the individual elements.

In the Fig. 1 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. In the housing 1, a cooking chamber 3 is defined, which can be controlled via a front side in the housing 1 introduced viewing window 4. In the Fig. 4 It can be seen that the cooking chamber 3 is bounded 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. In Fig. 1 the bottom door 7 is shown lowered, being with its underside in abutment with a worktop 8 a kitchen equipment. To close the cooking chamber 3, the bottom door 7 is in the in the Fig. 2 shown position, the so-called "zero position" to adjust. To adjust the bottom door 7, the Hoch-Einbaugargerät a drive device 9, 10 on. The drive device 9, 10 has a in the Fig. 1 . 2 and 4 shown with dashed lines drive motor 9, 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 stands, as in the Fig. 1 or 4 shown in operative connection with a pair of lifting elements 10 which are connected to the bottom door 7. It is according to the schematic side view of the Fig. 4 each lifting element 10 designed as an L-shaped carrier whose vertical leg extends from the housing-side drive motor 9. To adjust the bottom door 7 of the drive motor 9 can be actuated by means of a control panel 12 and a control circuit 13, which according to the Fig. 1 and 2 front side is arranged on the bottom door 7. As in Fig. 4 shown, the control circuit 13 is located behind the control panel 12 within the bottom door 7. The control circuit 13, which is composed here of several spatially and functionally separated and communicating via a communication bus circuit boards, is a central control unit for the device operation is and controls and / or regulates z. As 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.

Of the Fig. 1 It can be seen that a top of the bottom door 7 has a hob 15. Almost the entire surface of the hob 15 is of radiators 16, 17, 18 taken in the Fig. 1 dash-dotted lines are indicated. In Fig. 1 the radiators 16, 17 are two spaced apart, different sized cooking surface heaters, while the radiator 18 is provided between the two cooking area heaters 16,17 surface heating element, which almost encloses the cooking surface heaters 16, 17. The hotplate heaters 16, 17 define for the user associated cooking zones or hobs; the hotplate heaters 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 controlled via the control circuit 13.

In the exemplary embodiment shown, 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 Gargutträger 21 protrude, as well as in Fig. 4 shown. Instead of a glass ceramic plate 19, other - preferably quick-responding - covers can be used, for. B. a thin sheet.

With the help of a control panel 12 provided in the control knob, the high-installation cooking appliance can be switched to a cooking or a bottom heat mode, which will be explained below.

In the hob mode, 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 hob mode is executable with lowered bottom door 7, as in Fig. 1 is shown. But it can also be operated with closed cooking chamber 3 with raised floor door 7 in an energy saving function.

In the lower heat mode, not only the hotplate heaters 16, 17 but also the surface heating element 18 are activated by the control device 13.

In order to achieve as uniform a tanning image of the food as possible during the underheat operation, it is crucial that the heat providing the bottom heat Hob 15 has a uniform over the surface of the hob 15 distribution of the heating power output, although the radiators 16, 17, 18 have different ratings. Preferably, therefore, the radiators 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. 3 schematically shows the location of a circulating air pot 23 with a circulating air motor and an associated ring radiator, z. B. for generating hot air in a hot air operation. The open to the cooking chamber 3 Umlufttopf 23 is separated from this typically by a baffle (not shown). In addition, a mounted on an upper side of the muffle 5 Oberhitzeheizkörper 22 is provided, the single-circuit or mehrkreisig, z. B. with an inner and an outer circle, can be executed. By 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, possibly with activation of the hot air fan 23, can be adjusted. The adjustment of the heating power can be done by appropriate timing. In addition, the hob 15 can also be designed differently, for. B. with or without roasting zone, as a pure - one or mehrkreisige - 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.

In Fig. 5 is a schematic and not to scale a Hocheinbau-cooking appliance shown from the front, in which the bottom door 7 is open to rest with the worktop 8. The closed state is shown in dashed lines.

In this embodiment, two traversing panels 25 are located on the front side of the fixed housing 1. 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 one Without automatic operation (see below) moves the bottom door 7 only by continuous simultaneous pressing the CLOSE buttons 25a both traversing panels 25 upwards, 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. In an alternative embodiment, traversing 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.

When the operating mode for the open state is activated, a travel lock implemented in the control circuit 13 prevents the opened bottom door 7 from being moved; on the other hand, when the operating mode for the closed state is not activated.

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

In this exemplary embodiment, the control circuit 13 comprises a memory unit 27 for storing at least one destination or travel position P0, P1, P2, PZ of the bottom door 7, preferably with volatile memory components, eg. B. DRAMs. If a target position P0, P1, P2, PZ is stored, the bottom door can move independently after actuation of one of the keys 25a, 25b and 26a, 26b of the traversing panels 25 and 26 in the set direction until the next target position is reached or one of the buttons 25a, 25b or 26a, 26b is pressed again (automatic mode). In this embodiment, the lowest target position PZ corresponds to the maximum opening, the (zero) position P0 corresponds 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 opened 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. If the bottom door 7 is moved in automatic mode, an anti-pinch protection is preferably activated.

Automatic mode and manual operation are not mutually exclusive: by permanently actuating 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 P0, P1, P2, PZ may be any position of the bottom door 7 between and including the zero position P0 and the maximum open position PZ. However, the maximum stored opening position PZ need not be the position with abutment on the work surface 8. Storing the target position P0, P1, P2, PZ can with the bottom door 7 at the desired target position P0, P1, P2, PZ, by, for example, lasting several seconds (eg, lasting two seconds), pressing a confirmation key 28 in the control panel 12th 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-up of the desired target position P0, P1, P2, PZ to be set takes place, for example, by - in this embodiment - ambidextrous operation of the movement panels 25 or 26 and manual method to this position.

In the memory unit 27, only one or, as shown in this embodiment, a plurality of target positions P0, P1, P2, PZ can be einspeicherbar. In the case of several target positions P0, P1, P2, PZ, these can be approached successively by actuating the corresponding travel keys 25a, 25b or 26a, 26b. 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 detected 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 opens the bottom door 7 at least about 400 mm to about 540 mm (ie P1-P0, P2-P0, PZ-P0 ≥ 40cm to 54 cm). In 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.

Not shown is an existing power failure override for bridging of about 1 to 3 s power failure, preferably up to 1.5 s power failure.

The drive motor 9 off Fig. 1 has at least one sensor unit 31, 32 on a motor shaft 30, possibly in front of or behind a transmission arranged to measure a travel or a position and / or a speed of the bottom door 7. For example, the sensor unit may include one or more induction, reverberation, opto, SAW sensors, and so forth. In this case, two Hall (part) elements 31 offset by 180 ° - so opposite - attached to the motor shaft 30, and a Hallmeßaufnehmer 32 is fixedly mounted at this area of the motor shaft spaced for easy travel and Geschwindigkeitsmessüng here. 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. With (not necessarily) two Hall elements 31, therefore, two signals are output during one revolution of the motor shaft 30. By time evaluation of these signals, z. B. their time difference, the speed vL of the bottom door 7 can be determined, for example via comparison tables or a conversion in real time in the control circuit 13. By addition or subtraction of the measured signals, a travel or a position of the bottom door 7 can be determined.

A speed control can realize the speed, for example via a PWM-controlled power semiconductor.

For zero point determination, the distance measurement is automatically re-adjusted by initialization in the zero position P0 of the bottom door 7 at each start, so z. B. a faulty sensor signal output or recording is not traditional.

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.

The arrangement and distribution of the 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 operating safety, eg. B. as protection against pinching, be useful.

When the open mode is activated (eg, a hotplate, hold, or roast mode), in one embodiment, the control circuit 13 may inhibit the open bottom door 7 from deactivating, in this case by shorting, the drive motor 9 at the process. When the closed state mode is activated, the bottom door 7 is movable to allow checking of cooking food.

Fig. 6 shows the control panel 12 off Fig. 5 detail. The control panel 12 includes a left display panel 34, a center display panel 35, and a right display panel 36, which in this figure represent all possible displays, such as display panels. B. in the left display panel 34 mode icons, in the middle display box 35, a time, cooking time or other useful for the set mode parameters and the right display panel 36, a three-digit alphanumeric display 37, a temperature unit display 38 (which here is adjustable to ° C and ° F) and a step display 39. The control panel can be switched so that in the open state of the bottom door only modes for the open state are displayed and in the closed state of the bottom door only modes for the closed state. Alternatively, relevant modes of operation may be displayed as active for the open state of the bottom door and non-relevant operating modes for the open state as inactive, e.g. B. by means of different brightness, flashing, acoustic signals and / or symbols.

• eine Hauptschaltertaste 40 zum Ein- und Ausschalter des Geräts, ggf. mit Zeitverzögerung,
• eine Schlüsseltaste 41 zur Verriegelung des Geräts,
• eine Pfeil-Abwärts-Taste 42 zum Anwählen einzelner Betriebsarten in absteigender Reihenfolge, diese Taste kann so geschaltet sein, dass im geöffneten Zustand der Bodentür nur Betriebsarten für den geöffneten Zustand auswählbar sind und / oder im geschlossenen Zustand der Bodentür nur Betriebsarten für den geschlossenen Zustand auswählbar sind;
• eine Pfeil-Aufwärts-Taste 43 zum Anwählen einzelner Betriebsarten in aufsteigender Reihenfolge, diese Taste kann so geschaltet sein, dass im geöffneten Zustand der Bodentür nur Betriebsarten für den geöffneten Zustand auswählbar sind und / oder im geschlossenen Zustand der Bodentür nur Betriebsarten für den geschlossenen Zustand auswählbar sind;
• eine Ofenlampe bzw. ein Lichtschalter 44 zum aktiven Schalten einer Ofenbeleuchtung (nicht dargestellt) durch den Anwender,
• eine Uhrtaste 45 zum Anwählen einzelner Zeitfunktionen, z. B. Backzeit usw.,
• eine Weckertaste 46 zum Anwählen einer Weckerfunktion,
• eine Informationstaste 47 zum Aufrufen von Information, z. B. einer Ist-Temperatur oder einer Aufheizdauer,
• eine Minustaste 48 zum negativen Verstellen von Temperatur und Zeitfunktionen,
• eine Plustaste 49 zum positiven Verstellen von Temperatur und Zeitfunktionen,
• eine Schnellaufheiztaste 50 zum Ein- und Ausschalten einer Schnellaufheizfunktion und
• eine OK-Tastebzw. Bestätigungstaste 51 als Aktivierungstaste, z. B. für Zeitfunktionen und Betriebsarten. In einer Ausführungsform ist nur eine für den Öffnungszustand der Bodentür 7 bzw. des Garraums 3 / der Muffel 5 relevante Betriebsart durch Betätigung dieser Taste aktivierbar.

Below this is a series of switches 40-51, namely

• a main switch button 40 to the on and off switch of the device, possibly with time delay,
• a key button 41 for locking the device,
• an arrow down button 42 for selecting individual modes in descending order, this button can be switched so that in the open state of the bottom door only modes for the open state are selectable and / or closed-door mode only closed modes are selectable;
• an arrow-up button 43 for selecting individual modes in ascending order, this button can be switched so that in the open state of the bottom door only modes for the open state are selectable and / or closed-door mode only closed modes are selectable;
• a furnace lamp or a light switch 44 for actively switching a furnace lighting (not shown) by the user,
• a clock button 45 for selecting individual time functions, eg. B. baking time, etc.,
• an alarm button 46 for selecting an alarm clock function,
• an information key 47 for calling information, e.g. B. an actual temperature or a heating time,
• a minus key 48 for negative adjustment of temperature and time functions,
• a plus button 49 for positive adjustment of temperature and time functions,
• a Schnellaufheiztaste 50 for switching on and off a Schnellaufheizfunktion and
• an OK button. Confirmation key 51 as activation key, z. B. for time functions and modes. In one embodiment, only one relevant for the opening state of the bottom door 7 and the cooking chamber 3 / the muffle 5 operating mode can be activated by pressing this button.

In this embodiment, the mode selection circuit thus uses two separate arrow keys 42,43 and possibly the confirmation key 51. By operating the mode selector, the cooking device can be switched between different functionalities. The operating modes are cycled through. The mode selector circuit is not limited to the embodiment shown here.

Of course, the present invention is not limited to the described embodiment, but extends over the entire range of patent claims.

LIST OF REFERENCE NUMBERS

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

heating field

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

Travel switch upwards

25b

Travel switch down

26

Verfahrschaltfeld

26a

Travel switch upwards

26b

Travel switch down

27

storage unit

30

motor shaft

31

Hall element

32

transducer

33

limit switch

34

left display field

35

middle display field

36

right display field

37

alphanumeric display

38

Temperature unit display

39

level indicator

40

main switch

41

key button

42

Arrow down key

43

Up Arrow key

44

Oven lamp button

45

Clock button

46

alarm button

47

information button

48

minus key

49

plus button

50

Schnellaufheiztaste

51

OK or confirm button

52

Control panel

53

Cooking zone switch

54

middle display field

55

level indicator

56

alphanumeric display

P0

zero position

P1

intermediate position

P2

intermediate position

PZ

end position

Claims (8)

1. Cooking appliance which is mounted in an elevated manner with

   - a muffle (5) which defines a cooking chamber (3) and which comprises a muffle opening (6) on the base side,

   - a movable base door (7) for closing the muffle opening (6) with at least one hob (15) on its upper side,

   - at least one operational state for the open state of the base door (7) and

   - at least one operational state for the closed state of the base door (7),

   characterised in that only an operational state which is relevant for the opening state of the base door (7) can be activated in each case.
2. Cooking appliance which is mounted in an elevated manner according to claim 1, characterised in that the relevant operational state can be activated by actuating a confirmation button (51).
3. Cooking appliance which is mounted in an elevated manner according to one of the preceding claims, characterised in that the operational state for the open state is a warming, hotplate, or extended cooking function.
4. Cooking appliance which is mounted in an elevated manner according to one of the preceding claims, characterised in that the operational state for the closed state is a warming, cooking, rapid heating or pyrolysis function.
5. Cooking appliance which is mounted in an elevated manner according to one of the preceding claims, characterised in that only an operational state which is relevant for the opening state of the base door (7) can be displayed in each case.
6. Cooking appliance which is mounted in an elevated manner according to one of claims 1 to 4, characterised in that a control panel (12) shows an operational state which is relevant for the opening state of the base door (7) as active, and an operational state which is not relevant for the opening state as inactive.
7. Method for operating a cooking appliance which is mounted in an elevated manner according to one of the preceding claims, characterised in that

   - the at least one operational state for the open state of the base door is switched so it can be activated when the base door (7) is open, and the at least one operational state for the closed state is switched so it cannot be activated, and

   - the at least one operational state for the closed state is switched so it can be activated when the base door (7) is closed, and the at least one operational state for the open state is switched so it cannot be activated.
8. Method according to claim 7, characterised in that

   - the at least one operational state for the open state is displayed when the base door (7) is open, and the at least one operational state for the closed state is not displayed, and

   - the at least one operational state for the closed state is displayed when the base door (7) is closed, and the at least one operational state for the open state is displayed.

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