COOKING APPLIANCE

Abstract

A cooking appliance device includes a heating unit including an induction coil having an electric conductor, a substrate unit, and a fastening unit configured to fasten the induction coil to the substrate unit. The fastening unit fastens the electric conductor in at least one region on the substrate unit such that the electric conductor is movable relative to the substrate unit.

Claims

1-13. (canceled)

14. A cooking appliance device, comprising: a heating unit including an induction coil having an electric conductor; a substrate unit; and a fastening unit configured to fasten the induction coil to the substrate unit, said fastening unit fastening the electric conductor in at least one region on the substrate unit such that the electric conductor is movable relative to the substrate unit.

15. The cooking appliance device of claim 14, constructed in the form of an induction oven device.

16. The cooking appliance device of claim 14, wherein the fastening unit includes a thread, said induction coil being fastened to the substrate unit via a joint which has the thread.

17. The cooking appliance device of claim 16, wherein the fastening unit includes a further thread, said induction coil being fastened to the substrate unit via a further joint which has the further thread.

18. The cooking appliance device of claim 16, wherein the thread runs at least in a section across the electric conductor when viewed at a right angle onto the substrate unit.

19. The cooking appliance device of claim 16, wherein the thread runs at least in a section laterally adjacent to the electric conductor when viewed at a right angle onto the substrate unit.

20. The cooking appliance device of claim 17, wherein the further thread, when viewed at a right angle onto the substrate unit, runs at least in a section laterally adjacent to the electric conductor and on a side of the conductor which faces the thread.

21. The cooking appliance device of claim 14, wherein the region has at least two opposing subregions with respect to a coil center of the induction coil, said fastening unit fastening the electric conductor movably to the substrate unit relative to the substrate unit in each of the subregions.

22. The cooking appliance device of claim 14, wherein the electric conductor is permitted to move relative to the substrate unit along a direction which radially faces away from a coil center of the induction coil.

23. The cooking appliance device of claim 14, wherein the fastening unit includes a cover element arranged at least in a region on a side of the induction coil which side faces the substrate unit, said cover element restricting a movement of the induction coil on said side.

24. The cooking appliance device of claim 23, wherein the substrate unit and the cover element touch at least in a section in the region and form a stop with respect to a permitted movement of the electric conductor.

25. The cooking appliance device of claim 23, wherein the cover element is embodied at least essentially identical to the substrate unit.

26. A cooking appliance, in particular induction oven, comprising a cooking appliance device, said cooking appliance device comprising a heating unit including an induction coil having an electric conductor, a substrate unit, and a fastening unit configured to fasten the induction coil to the substrate unit, said fastening unit fastening the electric conductor in at least one region on the substrate unit such that the electric conductor is movable relative to the substrate unit.

27. The cooking appliance of claim 26, wherein the fastening unit includes a thread, said induction coil being fastened to the substrate unit via a joint which has the thread.

28. The cooking appliance of claim 27, wherein the fastening unit includes a further thread, said induction coil being fastened to the substrate unit via a further joint which has the further thread.

29. The cooking appliance of claim 27, wherein the thread runs at least in a section across the electric conductor when viewed at a right angle onto the substrate unit.

30. The cooking appliance of claim 27, wherein the thread runs at least in a section laterally adjacent to the electric conductor when viewed at a right angle onto the substrate unit.

31. The cooking appliance of claim 28, wherein the further thread, when viewed at a right angle onto the substrate unit, runs at least in a section laterally adjacent to the electric conductor and on a side of the conductor which faces the thread.

32. The cooking appliance of claim 26, wherein the region has at least two opposing subregions with respect to a coil center of the induction coil, said fastening unit fastening the electric conductor movably to the substrate unit relative to the substrate unit in each of the subregions.

33. The cooking appliance of claim 26, wherein the electric conductor is permitted to move relative to the substrate unit along a direction which radially faces away from a coil center of the induction coil.

34. The cooking appliance of claim 26, wherein the fastening unit includes a cover element arranged at least in a region on a side of the induction coil which side faces the substrate unit, said cover element restricting a movement of the induction coil on said side.

35. The cooking appliance of claim 34, wherein the substrate unit and the cover element touch at least in a section in the region and form a stop with respect to a permitted movement of the electric conductor.

36. The cooking appliance of claim 34, wherein the cover element is embodied at least essentially identical to the substrate unit.

37. A method for producing a cooking appliance device, in particular an induction oven device, said method comprising: fastening an induction coil of a heating unit to a substrate unit; and fastening an electric conductor of the induction coil in at least one region to the substrate unit so as to enable the electric conductor to move relative to the substrate unit.

Description

[0029] The drawings show:

[0030] FIG. 1 a schematic front view of a cooking appliance with a cooking appliance device,

[0031] FIG. 2 an exploded view of a part of the cooking appliance device,

[0032] FIG. 3 a schematic oblique view of a part of the cooking appliance device with a heating unit,

[0033] FIG. 4 a schematic top view of the heating unit with an induction coil and a substrate unit,

[0034] FIG. 5 a schematic flow chart of a method for producing the cooking appliance device,

[0035] FIG. 6a a schematic top view of a part of a cooking appliance device with a first relative arrangement of a conductor with respect to a thread,

[0036] FIG. 6b a schematic top view of a part of a cooking appliance device with a second relative arrangement of a conductor with respect to a thread,

[0037] FIG. 6c a schematic top view of a part of a cooking appliance device with a third relative arrangement of a conductor with respect to a thread,

[0038] FIG. 7a a schematic top view of a part of a cooking appliance device with a further thread at a minimal distance from the side and a thread at a minimal distance from the opposing side,

[0039] FIG. 7b a schematic top view of a part of a cooking appliance device with a further thread at a minimal distance from the side and a thread which runs at a distance from the opposing side,

[0040] FIG. 7c a schematic top view of a part of a cooking appliance device with a further thread which runs at a distance on the side and a thread which is at a minimal distance from the opposing side,

[0041] FIG. 8a a schematic top view of a cut-out of a cooking appliance device with a thread which intersects a conductor and which rests on the conductor,

[0042] FIG. 8b a schematic top view of a cut-out of a cooking appliance device with a thread which intersects a conductor, and which runs in sections at a distance from the conductor, and

[0043] FIG. 9 a schematic flow chart of a further method for producing the cooking appliance device from FIG. 8b.

[0044] Of multiple objects available, only one is provided with a reference character in the figures.

[0045] FIG. 1 shows a cooking appliance 30a. The cooking appliance 30a is embodied as an induction oven. The cooking appliance 30a has an external housing 44a. The external housing 44a defines an outer contour of the cooking appliance 30a. The external housing 44a receives a user interface 48a of the cooking appliance 30a. The user interface 48a is provided to be operated by an operator to control the cooking appliance 30a. The cooking appliance 30a has an internal housing 42a. The internal housing 42 a consist of a ferromagnetic metal. Alternatively, the internal housing 42a could have a nonmagnetic material, in particular glass, preferably glass ceramic. In this alternative embodiment, the internal housing 42a has a number of heating elements (not shown), which consist of a ferromagnetic metal. The cooking appliance 30a has an oven door 46a. The oven door 46a is located in a closed state. The oven door 46a covers an opening 52a of a cooking compartment 28a, which faces an operator. The oven door 46a and the internal housing 42a mutually delimit the cooking compartment 28a outward. The cooking appliance 30a has a cooking appliance device 10a. The cooking appliance device 10a is embodied as an induction oven device.

[0046] Part of the cooking appliance device 10a is shown in more detail in an exploded view in FIG. 2. The cooking appliance device 10a has the internal housing 42a. The cooking appliance device 10a has two heating units 12a. The heating units 12a are embodied to be identical to one another. The heating units 12a are arranged on a ceiling wall 54a and on a base wall 56a of the internal housing 42a. Alternatively or in addition it would be conceivable for the heating units 12a to be arranged on side walls or a rear wall of the internal housing 42a. Only one of the heating units 12a is described below.

[0047] The heating unit 12a has an induction coil 14a. During operation of the heating unit 12a, alternating current passes through the induction coil 14a and generates an electromagnetic alternating field. The induction coil 14a is embodied to be plate-shaped. A main extension plane (not shown) of the induction coil 14a runs parallel to a main extension plane of the ceiling wall 54a and the base wall 56a. The induction coil 14a has a conductor 16a. The conductor 16a is embodied as an individual wire. The conductor 16a is embodied as a blank individual wire. Alternatively, the conductor 16a could have an insulator. The conductor 16a has aluminum. Alternatively, the conductor 16a could have copper. The conductor 16a is arranged as a rectangular spiral. The conductor 16a is wound around a coil center 34a of the induction coil 14a.

[0048] The heating unit 12a has a substrate unit 18a. The substrate unit 18a is embodied in a mat-like manner. The substrate unit 18a is arranged between the induction coil 14a and the internal housing 42a. The induction coil 14a rests completely on the substrate unit 18a. The substrate unit 18a is used to thermally and electrically insulate the induction coil 14a. The substrate unit 18a consists at least to a large extent of a material which has at least the chemical elements Si and O. The material is a silicate. The substrate unit 18a is fibrous. The substrate unit 18a consists of mineral wool. The substrate unit 18a has basalt fibers. Alternatively or in addition, the substrate unit 18a could have spar fibers, dolomite fibers, diabase fibers, anorthosite fibers and/or coke fibers. The substrate unit 18a can be penetrated at least partially for fastening the induction coil 14a. The substrate unit 18a consists entirely of a two-dimensional textile structure. The substrate unit 18a consists entirely of a basalt tissue. Alternatively, the substrate unit 18a could consist partially of the basalt tissue. The substrate unit 18a has a plurality of feedthrough openings 24a. The feedthrough openings 24a are arranged periodically. The feedthrough openings 24a are arranged along a plurality of straight lines.

[0049] The heating unit 12a has a fastening unit 20a (cf. FIG. 3). The fastening unit 20a fastens the induction coil 14a to the substrate unit 18a. The fastening unit 20a fastens the conductor 16a in a region to the substrate unit 18a so as to be movable relative to the substrate unit 18a. Here the region extends across an entire extent of the induction coil 14a. The fastening unit 20a has a fastening element. The fastening element is embodied as a thread 22a. The induction coil 14a is fastened to the substrate unit 18a by means of a joint having the thread 22a. The thread 22a is embodied completely from silicate. The thread 22a is embodied completely from soluble glass. Alternatively, the thread 22a could consist of mineral wool and/or glass fibers. The thread 22a is guided through one part of the feedthrough openings 24a. The thread 22a is guided through the feedthrough openings 24a in accordance with a Lockstitch sewing method. The thread 22a runs completely laterally adjacent to the conductor 16a when viewed at right angles onto the substrate unit 18a. The thread 22a runs parallel to the conductor 16a. The thread 22a runs at a distance from the conductor 16a.

[0050] The fastening unit 20a has a further fastening element. The induction coil 14a is fastened to the substrate unit 18a by means of a further joint having a further thread 32a. The further thread 32a is embodied to be identical to the thread 22a. The further thread 32a has a further course which is identical to a course of the thread 22a. The further thread 32a is guided through a further part of the feedthrough openings 24a. When viewed at right angles to the substrate unit 18a, the further thread 32a runs on a side of the conductor 16a opposing the thread 22a. Prior to operation of the cooking appliance device 10a a distance of the thread 22a from the conductor 16a is at least largely identical to a further distance of the further thread 32a from the conductor 16a.

[0051] The fastening unit 20a has a cover element 26a. Alternatively, the fastening unit 20a could have a plurality of cover elements 26a. The cover element 26a has a silicate. The cover element 26a has basalt fibers. Alternatively or in addition the cover element 26a could have spar fibers, dolomite fibers, diabase fibers, anorthosite fibers and/or coke fibers. The cover element 26a is embodied to be identical to the substrate unit 18a. The cover element 26a is arranged on a side of the induction coil 14a opposing the substrate unit 18a. The cover element 26a and the substrate unit 18a are sewn to one another within the region. The cover element 26a and the substrate unit 18a are sewn to one another by means of the joint having the thread 22a. The cover element 26a and the substrate unit 18a are sewn to one another by means of the further joint having the further thread 32a. The cover element 26a and the substrate unit 18a touch in sections in the region. The cover element 26a and the substrate unit 18a form a stop with respect to a permitted movement of the conductor 16a. The stop is formed by the joint and the further joint.

[0052] The induction coil 14a rests entirely on the cover element 26a. Alternatively, the induction coil 14a could rest exclusively in the region on the cover element 26a. The cover element 26a restricts a movement of the induction coil 14a on this side. The cover element 26a, the thread 22a and the further thread 32a together define the region. The thread 22a and the further thread 32a form stops, to which the substrate unit 18a and the cover element 26a are sewn. The stops restrict a movement of the induction coil 14a parallel to a main extension plane of the induction coil 14a. In the region the substrate unit 18a and the cover element 26a restrict a movement of the induction coil 14a at right angles to the main extension plane of the induction coil 14a. Permitted movements of the conductor 16a comprise a movement along a direction 40a which faces away with respect to a coil center 34a, which, when viewed at right angles onto the substrate unit 18 faces away from the coil center 34a of the induction coil 14a. The length of the permitted movement along the direction 40a is identical to a length by which the conductor 16a expands during operation of the cooking appliance device 10a. Permitted movements of the conductor 16a comprise a movement against the direction 40a.

[0053] FIG. 4 shows the cooking appliance device 10a before operation of the cooking appliance device 10a. For reasons of clarity, the induction coil 14a is shown in a simplified form with a reduced number of windings and a hatched conductor 16a. In addition, the distance between the thread 22a and the further thread 32a from the conductor 16a is shown reduced. The region comprises the entire induction coil 14a. The fastening unit 20a has an additional thread 50a. The additional thread 50a runs along a smallest possible rectangle, which just receives a projection of the induction coil 14a on the substrate unit 18a. The additional thread 50a passes entirely around the induction coil 14. The additional thread 50a is used to stabilize the substate unit 18a and the cover element 26a. During operation of the cooking appliance device 10a the conductor 16a experiences thermal expansions. The thermal expansions produce expansion movements of the induction coil 14a in the direction 40a. The expansion movements are movements of the induction coil 14a which are permitted within the region.

[0054] FIG. 5 shows a schematic flow chart of a method for producing the cooking appliance device 10a. In one winding step 100a, the induction coil 14a is produced by winding the conductor 16a. Alternatively, the induction coil 14a could be produced by winding a stranded wire and/or stamping the conductor 16a from a metal plate (not shown).

[0055] In an insulation step 110a, the induction coil 14a is placed on the substrate unit 18a and covered with the cover element 26a. The insulation step 110a here follows on from the winding step 100a.

[0056] In a sewing step 120a, the substrate unit 18a and the cover element 26a are penetrated by a sewing needle. The substrate unit 18a and the cover element 26a are sewn to one another according to the Lockstitch sewing method. The thread 22a is guided here through a part of the feedthrough openings 24a. Then the further thread 32 is guided through further part of the feedthrough openings 24a in an identical way. Here the sewing step 120a follows on from the insulation step 110.

[0057] In an assembly step 130a, the heating unit 12a is mounted on the internal housing 42a. The heating unit 12a is screwed to the internal housing 42a. Alternatively, the heating unit 12a could also be clamped and/or riveted to the internal housing 42a.

[0058] FIGS. 6a to 9 show further exemplary embodiments of the invention. The subsequent descriptions are essentially restricted to the differences between the exemplary embodiments, wherein with respect to the same components, features and functions, reference can be made to the description of the exemplary embodiment in FIGS. 1 to 5. To distinguish between the exemplary embodiments, the letter a in the reference characters of the exemplary embodiment in FIGS. 1 to 5 is replaced by the letters b to i in the reference characters of the exemplary embodiments in FIGS. 6a to 9. With respect to components of the same type, in particular with respect to components with the same reference characters, reference can basically also be made to the drawings, and/or the description of the exemplary embodiment in FIGS. 1 to 5.

[0059] For the sake of clarity, covered conductors 16b-g are shown hatched in the following figures of cover elements 26b-g.

[0060] FIGS. 6a-c show in each case one part of cooking appliance devices 10b, 10c, 10d. Induction coils 14b, 14c, 14d of the cooking appliance devices 10b, 10c, 10d are fastened to substrate units 18b, 18c, 18d by means of joints having threads 22b, 22c, 22d. Cover elements 26b, 26c, 26d are sewn to one another by means of the joints having the threads 22b, 22c, 22d. In the cooking appliance device 10b a thread 22b runs along a side of a conductor 16b, at a minimal distance from the conductor 16b, aligned against a direction 40b which faces away with respect to a coil center (not shown). The conductor 16b is fastened largely immovably to the substrate unit 18b against the direction 40b. The substrate unit 18c consists entirely of glass fibers. In the cooking appliance device 10c, a thread 22c runs along a side of a conductor 16c, at a distance from the conductor 16c, aligned along a direction 40c which faces away with respect to a coil center (not shown). The conductor 16c is fastened movably to the substrate unit 18c along and against the direction 40c. In the cooking appliance device 10d, a thread 22d runs along a side of a conductor 16d, at a minimal distance from the conductor 16d, aligned along a direction 40d which faces away with respect to a coil center (not shown). The conductor 16d is fastened immovably to the substrate unit 18d along the direction 40d.

[0061] FIGS. 7a-c show in each case a part of cooking appliance devices 10e, 10f, 10g.

[0062] In the cooking appliance devices 10e, 10f, 10g threads 22e, 22f, 22g and further threads 32e, 32f, 32g run along opposing sides of conductors 16e, 16f, 16g. In the cooking appliance device 10e the thread 22e and the further thread 32e run at a minimal distance from the conductor 16e. The conductor 16e is fastened immovably to a substrate unit 18e along and against a direction 40e which faces away with respect to a coil center (not shown). A thread 22f with a distance from a conductor 16f runs in the cooking appliance device 10f. A further thread 32f runs at a minimal distance from the conductor 16f. The conductor 16f is fastened immovably to a substrate unit 18f against a direction 40f which faces away with respect to a coil center (not shown). In the cooking appliance device 10g, a thread 22g runs 16g at a minimal distance from a conductor 16g. The thread 32g runs at a distance from a conductor 16g. The conductor 16g is immovably fastened to a substrate unit 18g along a direction 40g which faces away with respect to a coil center (not shown).

[0063] FIGS. 8a-b show in each case a part of cooking appliance devices 10h, 10i. Induction coils 14h 14i of the cooking appliance devices 10h, 10i are sewn to substrate units 18h, 18i completely by threads 22h, 22i. In the cooking appliance devices 10h, 10i, the threads 22h, 22i run in each case at periodic intervals across a conductor 16h, 16i. The threads 22h, 22i run in each case in a zigzag pattern. Feedthrough openings 24h, 24i in each case form reversal points of the zigzag pattern. The threads 22h, 22i are guided in each case through the feedthrough openings 24h, 24i according to a zigzag sewing method. Alternatively, the threads 22h, 22i could each run in sections parallel to the conductors 16h, 16i. In the cooking appliance device 10h, the conductor 16h is fastened immovably to the substrate unit 18h along a main extension plane of the induction coil 14h. The conductor 16h is embodied as a stranded wire. In the cooking appliance device 10i, part of the feedthrough openings 24i runs at a distance from the conductor 16i. The part of the feedthrough openings 24i is arranged on a side of the conductor 16i which is aligned along a direction 40i which faces away with respect to a coil center (not shown). The conductor 16i is fastened immovably to the substrate unit 18i against the direction 40i. The cooking appliance devices 10h, 10i have no cover elements. The joints having the threads 22h, 22i sew the induction coils 14h, 14i in each case together with one of the substrate units 18h, 18i.

[0064] FIG. 9 shows a flow chart of a method for producing the cooking appliance device 10i. In a positioning step 140i, the induction coil 14i is arranged in an unwound state on the substrate unit 18i.

[0065] In a stitch step 150i, the induction coil 14i is wound at the same time and the thread 22i is guided through the feedthrough openings 24i in accordance with the zigzag sewing method. The stick step 150i here follows on from the positioning step 140i.

[0066] In an assembly step 160i, the heating unit 12i is mounted on the internal housing (not shown). The heating unit 12i is screwed to the internal housing. Alternatively, the heating unit 12i could also be clamped and/or riveted to the internal housing.

REFERENCE CHARACTERS

[0067] 10 cooking appliance device

[0068] 12 heating unit