EP1931919A1

EP1931919A1 - Cooking appliance which is mounted in an elevated manner

Info

Publication number: EP1931919A1
Application number: EP06778435A
Authority: EP
Inventors: Ingo Bally; Kerstin Feldmann; Wolfgang Fuchs; Martin Keller; Edmund Kuttalek; Maximilian Neuhauser; Klemens Roch; Wolfgang Schnell; Günter ZSCHAU
Original assignee: BSH Bosch und Siemens Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2005-09-19
Filing date: 2006-09-13
Publication date: 2008-06-18
Also published as: WO2007033926A1; DE102005044694A1

Abstract

The invention relates to a cooking appliance which is mounted in an elevated manner, which comprises a muffle which defines a cooking chamber and which comprises a muffle opening on the base side thereof, a displaceable door which is used to close the muffle opening, and a disk (34) which is arranged in the front wall (5a) of the muffle. Said disk (34) is pressed against a front-sided wall section (5b) of the muffle (5) and/or against a wall section of the housing of the muffle by a maintaining device for the fixing thereof, and can expand, in the fixed state, in at least two directions which are essentially orthogonal in relation to each other and laterally in a free chamber thereof.

Description

High-level cooking appliance

The present invention relates to a high-installation cooking appliance, comprising at least one muffle defining a cooking space with a muffle opening, a door movable by means of a drive device for closing the muffle opening and a pane in a front muffle wall.

From DE 100 59 657 A1 discloses a high-installation cooking appliance with a cooking space defining muffle with a bottom-side muffle opening and an adjustable door for closing the muffle opening is known. In a front wall of the muffle a disc is arranged in order to be able to view through this a good to be heated in the oven (viewing window).

Generally, panes or viewing windows are known for use in ovens for such a purpose. The material used is borosilicate glass, which is comparatively resistant to mechanical stress. In a baking cart, which is inserted from a front in a cooking chamber, the disc is also firmly clamped on all sides in order to attach to the front of the back cart and an accessory holder can; Borosilicate glass is used to prevent cracking during thermal expansion. Although in ovens with a pivotable door, the viewing window is freely supported laterally in a frame, borosilicate glass is used to achieve sufficient impact resistance. A disadvantage of garages with such a window is generally that borosilicate glass is expensive and is also used with a large thickness of usually 4 mm or more, which makes the window comparatively difficult.

It is therefore the object of the present invention to provide a cooking appliance with a lighter and cheaper disc construction.

The present object is achieved by the cooking appliance having the features of patent claim 1.

For this purpose, at the high-installation cooking appliance with a muffle defining a cooking space with a bottom-side muffle opening, an adjustable door for closing the muffle opening, and a pane or a viewing window in a front wall of the muffle, the pane is secured by a holding device a front wall portion of the muffle and / or against pressed a wall portion of a housing of the muffle and the disc can extend in such a fixed state in at least two substantially mutually orthogonal directions laterally in a free space. This means that the disc is not laterally clamped so that it is placed under heating due to thermal expansion under a schadenserheblich mechanical tension. In addition, it should be understood that the holding device presses the disc against the front wall portion so that the disc can still perform a lateral thermal expansion.

Advantageously, a high-installation cooking appliance, in which the holding device clamping elements, in particular mechanical clamping springs, which surround the disc from the side and which are attached to a wall of the muffle.

Preferably, with the holding device, the disc is releasably secured again, so that it can be removed for cleaning purposes or to reach the cooking chamber in case of repair. The fact that the disc is supported on the underside of a support member and is stored freely upwards, has the advantage of being able to support a portion of the disc load downwards during assembly of the disc, allowing for expansion of the disc in such a case upwards enough free space must remain.

The pane with such a construction can cover at least the entire front side of the muffle as a panorama pane, thus essentially representing the front side or wall of the muffle.

The disc may be formed of inexpensive standard glass, in particular of soda lime glass or float glass as partially tempered soda lime glass. A disk with a thickness of less than 4 mm, in particular less than 3 mm, including less than 2 mm, is possible. Such a disk can be cleaned from the inside in pyrolysis operation.

Particularly advantageous is a high-installation cooking appliance, in which a housing disguises the muffle, wherein the housing to the disc in alignment in a front panel has an intermediate disc and / or a windscreen, behind the back at least a small free space is formed to additional heat insulation to build. It is expedient that an intermediate wall with an intermediate wall pane is inserted between the pane and the front pane, which further allows reduced demands on the quality characteristics of the glasses for the panes.

Particularly noteworthy is that such a structure and the expansibility of the disc to their sides even pyrolysis can be used for the cleaning of the cooking chamber, although as a material for the disc standard glass, especially soda lime glass with a thickness of less than 4 mm and in particular less than 3 mm is used. Compared to conventional ovens, the requirements for the material are also lower because the pane does not necessarily have to be firmly clamped from its sides. The use of thin soda-lime glass or float glass or tempered soda-lime glass allows a space-saving design, a cost saving with regard to the components used and their assembly as well as a weight saving, since lighter glass and also thinner glass can be used.

The invention will be described in more detail below with reference to the accompanying figures. Show it:

Fig. 1 is a perspective view of a mounted on a wall

Built-in high unit with lowered bottom door;

2 is a perspective view of the Hoch-Einbaugargeräts with closed bottom door.

3 is a perspective view of a housing of the Hoch-Einbaugargeräts without the bottom door.

Figure 4 is a schematic side view in a sectional view of the mounted on the wall high installation cooking appliance with lowered bottom door. Fig. 5 shows in front view another embodiment of a high-installation cooking appliance; and

Fig. 6 is a plan view in section on a front side cutout of a muffle with a window assembly for allowing a view from the front into the muffle.

1 shows a high-installation cooking appliance with a housing 1 is shown. The back of the housing 1 is like a hanging cabinet on a wall. 2 assembled. 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 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. In Fig. 1, the bottom door 7 is shown lowered, being with its underside in contact with a worktop 8 a kitchen device. 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. To adjust the bottom door 7, the Hoch-Einbaugargerät a drive device 9, 10 on. 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. 4, each lifting element 10 is designed as an L-shaped carrier, whose vertical leg extends from the housing-side drive motor 9 To adjust the bottom door 7, 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. As shown in Fig. 4, 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 separate and communicating via a communication bus circuit boards, is a central control unit for the device operation 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 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 of radiators 16, 17,

18 ingested, which are indicated by dash-dotted lines in Fig. 1. In Fig. 1, the radiator 16, 17 two spaced apart, different sized cooking surface heaters, while the radiator 18 is provided between the two cooking area heaters 16,17 surface heater that almost encloses the cooking area 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 designed 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 shown in Fig. 4. 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 hotplate mode, the hotplate 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.

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 the most uniform possible tanning of the food during the bottom heat, it is crucial that 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 heaters 16, 17, 18 are different

Rated power. 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 shows schematically the position of a Umlufttopfes 23 with ring heater and circulating air motor (not shown), z. B. for generating circulating air in a hot air operation or for supplying fresh air. 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. Also can - not shown here for clarity - another radiator such as a ring heater between the rear wall of the housing 1 and the muffle be present. 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 fan 23, are set. 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 more circular - 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. 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 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.

In this embodiment are located on the front of the fixed

Each traversing panel 25 comprises two push buttons, namely an upper CLOSE button 25a for an upwardly in closing direction moving bottom door 7 and a lower OPEN push button 25b for a downwardly opening Direction moving floor door 7. Without automatic mode (see below) moves the bottom door 7 only by continuous simultaneous pressing the CLOSE buttons 25a both traversing panels 25 upwards, if possible; the floor also moves 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 increased user attention is given to the user and also both hands must be used here because of a distance of the traversing fields 25 and 26 of more than 20 cm, an anti-trap is then only 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.

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 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 buttons 25a, 25b or 26a, 26b is pressed again (automatic mode). In this embodiment, the lowest target position as an end position PZ of the maximum opening, the (zero) position PO corresponds to the closed state, and P1 and P2 are freely adjustable intermediate positions. If the bottom door 7 is moved in particular in automatic mode, an anti-pinch protection is preferably activated. Automatic mode and manual operation are not mutually exclusive.

A target position PO, P1, P2, PZ can see any position of the bottom door 7 between and including the zero position PO and the maximum open position

Be PZ. However, the maximum stored opening position PZ need not be the position with abutment on the work surface 8. 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. In the memory unit 27, only one or, as shown in this embodiment, a plurality of target positions PO, P1, P2, PZ can be einspeicherbar. In the case of a plurality of target positions PO, P1, P2, PZ, these can be approached successively by actuating the corresponding movement keys 25a, 25b or 26a, 26b. By multiple target positions PO, 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 PO is automatically detected and can be automatically approached. Alternatively, the zero position PO 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 -PO, P2-P0, PZ-PO> 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 to 1, 5 s power failure.

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. For example, the sensor unit may include one or more induction, reverberation, opto, SAW sensors, and so forth. Here, 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 Hallmeßaufnehmer 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. 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 measuring 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 readjusted by initialization in the zero position PO of the bottom door 7 at each startup, so z. B. a faulty sensor signal output or -aufnähme 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.

Fig. 6 shows schematically the muffle 5, which has a window opening 5a on the front side. In front of the window opening 5a and in front of the window opening 5a laterally bounding wall portion 5b of the muffle 5, a disc 34 is arranged and fixed. For fixing the disk, a holding device is used, preferably consisting of a plurality of clamping elements 35, which engage over the disk 34 in the front-side direction and press against the wall section 5b of the muffle 5. The pressure is so great that the disc 34 securely in front of the window opening 5a is attached. The clamping elements 35 are arranged such that the disk 34 can expand in an expansion due to heating in the lateral direction between these and the muffle 5 or other elements. The expansion is made possible in particular in two mutually orthogonal directions, so that no thermally induced stresses in the disc 34 and can cause their breakage. In other words, the disc 34 is left free spaces on at least two mutually orthogonal sides, so that the disc 34 can extend in the event of a required expansion in these free spaces.

Preferably, such a high-installation cooking appliance in addition to the muffle 5, the housing 1, which is usually a self-contained front panel as a front panel with an integrated front screen 37 is formed. The front screen 37 has in the rearward direction to the muffle or to the disk 34 fixed thereto on a free space, which acts as a heat insulator supporting. According to a particularly preferred embodiment may also be inserted between the front panel and the front of the muffle 5, a further intermediate wall, in which an intermediate disc 36 is inserted accordingly. The larger the number of slices and the spaces between the slices, the lower the requirements for heat loadability and impact resistance to the individual slices.

In particular, it is possible to use as standard material for the panes standard glass, such as soda-lime glass or float glass or tempered soda-lime glass, since the lateral expansion possibility can not give rise to internal stresses and cracks. Since no objects can fall on a windshield of a high-installation cooking appliance, such as on a disc of a swung conventional oven door, jumps are usually not occur.

According to first experiments, even when using a pyrolysis operation, disks may be used as inner disks 34 directly in front of the window opening 5a with a thickness of less than 4 mm, in particular less than 3 mm and optionally even less than 2 mm.

It is particularly advantageous if the inner pane or the inner viewing window 34 completely covers the muffle 5 at the front, ie without visible interference. shiny frame ("panoramic window"). The inner window 34 then represents the front wall or side of the muffle 5. It is particularly advantageous if the inner window 34 has no own frame at all, but only - possibly on guides - is pressed onto the front muffle opening.

LIST OF REFERENCE NUMBERS

1 housing

2 wall

3 cooking space

4 viewing window

5 muffles

5a window opening

5b Wall section of the muffle

6 muffle opening

7 bottom door

8 worktop

9 drive motor

10 lifting element

11 control element

12 control panel

13 control circuit

14 ad elements

15 hob

16 hotplate radiators

17 hotplate radiators

18 surface heating elements

19 glass ceramic plate

20 mounting part

21 food support

22 top heaters

23 fans

24 seal

25 traversing panel

25a travel switch upwards

25b Travel switch down

26 traversing panel

26a Travel switch upwards

26b Travel switch down

27 storage unit

28 confirmation button 29 main switch

30 motor shaft

31 Hall element

32 transducers

33 limit switch

34 disc

35 clamping elements

37 windscreen

36 washer

PO zero position

P1 intermediate position

P2 intermediate position

PZ end position vL Travel speed of the bottom door

Claims

claims

1. High-installation cooking appliance with a cooking chamber (3) delimiting muffle (5) with a bottom-side muffle opening (6), an adjustable door (7) for closing the muffle opening (6), and a disc (34) in a front wall ( 5a) of the muffle (5), characterized in that

- The disc (34) for its attachment by a holding device against a front wall portion (5 b) of the muffle (5) and / or against a

Wandungsabschnitt a frame of the muffle (5) is pressed, and that

- The disc (34) can extend in such a fixed state in at least two substantially mutually orthogonal directions laterally into a free space.

2. High-installation cooking appliance according to claim 1, characterized in that the holding device has clamping elements (35) which surround the disc (34) from the side.

3. High-installation cooking appliance according to claim 1 or 2, characterized in that the holding device comprises clamping elements (35) which are fixed to a frame of the muffle (5).

4. High-installation cooking appliance according to one of the preceding claims, characterized in that the holding device releasably secures the disc (34).

5. High-installation cooking appliance according to one of the preceding claims, characterized in that the disc is supported on the underside on a support member and is mounted freely upwards.

6. High-installation cooking appliance according to one of the preceding claims, characterized in that the disc (34) as a panoramic plate, the front side of the muffle (5) completely covers.

7. High-installation cooking appliance according to one of the preceding claims, characterized in that the disc (34) is formed of standard glass.

8. High-installation cooking appliance according to one of the preceding claims, characterized in that the disc (34) is formed of soda lime glass or float glass as partially-tempered soda lime glass.

9. High-installation cooking appliance according to one of the preceding claims, characterized in that the disc (34) has a thickness of less than 4 mm, in particular less than 3 mm, including less than 2 mm.

10. High-installation cooking appliance according to one of the preceding claims, characterized in that the disc (34) can be cleaned from the inside in the pyrolysis operation.

11. High-installation cooking appliance according to one of the preceding claims, characterized in that a housing (1) the muffle (5) clad, wherein the housing (1) to the disc (34) in alignment in a front panel an intermediate disc and / or a windscreen (37), behind the back of at least a small free space is formed.

12. High-installation cooking appliance according to claim 11, characterized in that between the disc (34) and the front screen (37) has an intermediate wall with a

Washer (36) is inserted.