EP1929212A1

EP1929212A1 - Cooking appliance

Info

Publication number: EP1929212A1
Application number: EP06793454A
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: 2006-09-12
Publication date: 2008-06-11
Also published as: US20100089903A1; RU2008113017A; WO2007033918A1; DE102005044645A1

Abstract

The invention relates to a cooking appliance, in particular, a cooking appliance which is mounted in an elevated manner, comprising a muffle (5) which defines a cooking chamber (3) and which comprises a muffle opening (6), a housing (1) for cladding the muffle, a door (7) which can be displaced for closing the muffle opening, a guide rod (10) which is used to guide and displace the door in relation to the muffle opening and electric and/or electronic components which are arranged inside the door and electric connection elements which are arranged between the electric and/or electronic components inside the door and connected to the housing. The electric connection elements are formed by cables (34), in particular, having strain relief (38), and at least one part of the cable is received via at least one part of the longitudinal extension thereof in a cable guide (36, 37), in order to enable a secure cable connection between the electric and/or electronic components in the door and the corresponding connections in the housing, without the cables being guided in an uncontrollable manner in a free chamber of the housing or rub against each other or against additional components inside the housing and as a result become worn.

Description

Cooking appliance

The present invention relates to a cooking appliance, in particular a high-installation cooking appliance, with at least one muffle defining a cooking chamber with a muffle opening and a movable door for closing the muffle opening.

DE 100 59 657 A1 discloses a cooking appliance with a muffle defining a cooking space with a muffle opening, a housing for covering the muffle, a movable door for closing the muffle opening, telescopic guide rods for guiding and moving the door relative to the muffle opening and / or electric and / or or electronic components in the form of switches and indicators in the traveling door. In addition, cables between at least a portion of the electrical or electronic components in the door and terminals, for example, a central control circuit on top of the housing for their electrical connection with each other, it is well known, a contact in the field of telescopic guide rods through plugs and sockets and Provide busbars. However, plugs and sockets only allow operation in the fully closed state of the cooking appliance. Busbars are problematic and expensive in terms of contacting.

It is therefore the object of the present invention to provide a cooking appliance with an improved bridging of the contact distance between the door and the housing.

The present object is achieved by the cooking appliance having the features of patent claim 1. Advantageous embodiments are the subject of dependent claims.

Accordingly, a cooking appliance, in particular a high-installation cooking appliance, with a muffle defining a cooking space with a muffle opening, a housing for dressing the muffle, a movable door for closing the muffle opening, a guide rod for guiding and moving the door relative to the muffle opening and electrical and / or electronic components within the door and electrical connection elements between the electrical and / or electronic components within the door and terminals in the housing, wherein the electrical connection elements are formed by cables are at least a portion of the cable is received over at least part of its longitudinal extent in a cable guide to allow a cable connection from the electrical and / or electronic components in the door to corresponding terminals in the housing in a secure manner, without the cables are uncontrollably guided in a free space of the housing or rub against each other or other components within the housing and wear out.

It is particularly advantageous that the guide rod is formed by a telescopic guide rod and the cables are passed through them. It is particularly advantageous also that the electrical and / or electronic components are connected via the cable to the central control circuit above the muffle in the housing.

It is particularly advantageous that the cable guide is formed by individual guide elements spaced apart in the guide rod and / or in a free space within the housing.

Particularly advantageous is a cooking appliance, in which the cable guide is formed by a hose, a protective tube, a spiral cable or a cable guide chain. This allows in addition to a controlled and orderly guidance also a protection of the cable against scrubbing on adjacent cables or other components within the housing or within the telescopic rods.

It is preferred that the cable guide elastically guide the cables between an outer wall of the muffle and a housing inner wall of the housing to form and guide loops within the housing as the door is closed.

It is particularly advantageous that the cable guide forms a strain relief for the cable or is arranged by means of a strain relief within the housing. Such a strain relief not only allows a controlled fixation of the cable guide within the housing but also a relief of train on the cable ends when extending the door in an open state. Preferably, the strain relief is arranged adjustable in the direction of the guide rod. It is also advantageous if the strain relief in unequal and relative to the door is adjustable. This also allows a more targeted guidance of the cable or its cable management within a free space of the housing.

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

1 is a perspective view of a mounted on a wall Hoch-Einbaugargeräts with lowered bottom door.

2 is a perspective view of the high-installation cooking appliance 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;

Fig. 6 is a sectional view of components of a preferred high-bay cooker; and

Fig. 7 shows a partial sectional view of an upper part of a Hoch-Einbaugargeräts according to an alternative embodiment. ,

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. 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 in the region of the back of the housing. 1 arranged and is, as shown in Fig. 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 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. In Fig. 1, the radiator 16, 17 are two spaced apart, different sized cooking hob, while the radiator 18 is provided between the two cooking area heaters 16,17 surface heating element, which 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 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 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 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 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 image 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 heating elements 16, 17, 18 have different nominal powers. 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. 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. 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, located at the front of the fixed housing 1 on laterally opposite side portions of the viewing window 4 two traversing panels 25. Each traversing panel 25 includes two push buttons, namely an upper CLOSE push button 25a for an upward in closing direction traversing bottom door 7 and a bottom OPEN pushbutton 25b for a bottom door in the opening direction moving 7. 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 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 so that the bottom door 7 anfährt gently, ie 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 may be any position of the bottom door 7 between and including the zero position PO 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. 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 the bottom door 7 at least about 400 mm to about 540 mm opens (ie P1-P0, P2-P0, PZ-PO> 40cm to 54cm). 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 are for easy distance and speed measurement here two Hall (part) elements 31 offset by 180 ° - ie opposite - attached to the motor shaft 30, 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 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 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 components in the region of the muffle 5 and the cooking chamber 3 of a preferred high-installation cooking appliance, wherein cable 34 between electrical and / or electronic components 11, 29 within the bottom door 7 and a control circuit 13 on the upper side between the muffle 5 and an inner wall of the Housing 1 run. In the fully extended state of the door 7, the cables 34, as outlined, preferably fully stretched, but still without a tensile load on the contact points to the control circuit 13 and the electrical and / or electronic components 11, 27 are arranged. Sketched is a situation with an opening dimension O of the door 7 below the housing 1 is greater than a mounting height H of the housing 1 itself, which is made possible by the use of trained as a telescopic guide rods lifting elements 10. When retracting the door 7 or when closing the muffle opening 6 through the door 7, the upper portions of the cable 34 are pushed into a correspondingly vacant space 35 between the muffle 5 and the inner wall of the housing 1. So that the cables are not damaged and in particular a large number of adjacent cables 34 is not confused pushed through each other, at least part of the cable 34 is received and guided in a cable guide 36. As can be seen from FIG. 6, the cable guide can be formed by simple individual and spaced-apart guide elements. Fig. 7 shows a partial sectional view of an upper part of a Hoch-Einbaugargeräts according to an alternative embodiment. In this particularly preferred embodiment, the cables 34 are guided by a cable guide 36 designed as a protective tube, spiral cable or preferably as a cable guide chain 37. The cable guide chain 37 extends again between an outer wall of the muffle 5 and an adjacent inner wall of the housing 1. Again, a freed space 35 is sufficiently dimensioned, in the fully retracted and the muffle 6 closing state of the door 7 sufficient space to accommodate the entire cable length to offer.

As can be seen from Fig. 7, in addition to the cable guide in the form of a cable guide chain 37, a strain relief 38 is provided, which is formed in a particularly simple embodiment by a cable guide 37 encompassing loop, which at an outside attachment point on the muffle 5 or through an inside attachment point on an inner wall of the housing 1 provides a fixation of the cable guide. According to a particularly preferred embodiment of such a strain relief is taken into account that cable is pushed when booting the door 7 from the telescopic guide rod 10 in the form of the lifting element in the freed space 35 upwards by the loop, which surrounds the cable guide chain 37, height adjustable is mounted in the housing 1. The height adjustment of the loop is carried out for lifting the cable guide chain 37 and thus guided therein cable 34. Preferably, it can be provided that the stroke of the loop of such a strain relief 38 is less than the simultaneous stroke distance of the door 7, so as to form a loop of cable management within of the open space 35.

By using cables 34 for connecting electrical and electronic components 11, 27 in the door 7 with the central control circuit 13 above the muffle 5 in addition to a cable protection when using a cable guide at the same time also the principal applicability of the bottom door 7 in the open state for controlling components within the housing 1 and / or for controlling components within the door 7.

The outside or drapery of the muffle can also be referred to as a housing body, wherein between housing body and muffle inside typically scherweise - apart from the front windows equipped with viewing windows - insulating layers are attached.

LIST OF REFERENCE NUMBERS

1 housing

2 wall

3 cooking space

4 viewing window

5 muffles

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 cables

36 cable guide

37 cable guide chain

38 strain relief

PO zero position

P1 intermediate position

P2 intermediate position

PZ end position vL Travel speed of the bottom door

Claims

claims

1. cooking appliance with a cooking chamber (3) delimiting muffle (5) with a muffle opening (6), a housing (1) for dressing the muffle (5), a movable door (7) for closing the muffle opening (6), a Guide rod (10) for guiding and moving the door (7) relative to the muffle opening (6) and electrical and / or electronic components (11, 29) within the door (7) and electrical connecting elements between the electrical and / or electronic components (11 , 29) within the door (7) and terminals in the housing (1), characterized in that the electrical connection elements are formed by cables (34), wherein at least a part of the cables (34) over at least a part of their longitudinal extent in one Cable guide (36, 37) is added.

2. Cooking appliance according to claim 1, characterized in that the door (7) is designed as a bottom door of a Hoch-built-in cooking appliance.

3. Cooking appliance according to claim 1 or 2, characterized in that the guide rod (10) is formed by a telescopic guide rod and the cables are passed therethrough.

4. Cooking appliance according to one of the preceding claims, characterized in that the electrical and / or electronic components (11, 29) via the cable (34) with a central control circuit (13) in the housing (1) are connected.

5. Cooking appliance according to one of the preceding claims, characterized in that the cable guide is formed by individual spaced-apart guide elements (36) in the guide rod (10) and / or in a free-floating space (35) within the housing (1).

6. Cooking appliance according to one of the preceding claims, characterized in that the cable guide is formed by a hose, a protective tube, a spiral cable or a cable guide chain (38).

7. Cooking appliance according to one of the preceding claims, characterized in that the cable guide, the cable (34) between an outer wall of the muffle (5) and a housing inner wall of the housing (1) leads deformable.

8. Cooking appliance according to one of the preceding claims, characterized in that the cable guide (37) forms a strain relief (38) for the cable (34) or by means of a strain relief (38) within the housing (1) is arranged.

9. cooking appliance according to claim 8, characterized in that the strain relief (38) in the direction of the guide rod (10) is adjustably arranged.

10. Cooking appliance according to claim 9, characterized in that the strain relief in unequal and relative to the door (7) is adjustable.