INDUCTION FURNACE DEVICE

Abstract

An induction oven device includes a heating unit including an induction coil having an electrical conductor, a substrate unit having a through-flow opening, and a fastening unit configured to fasten the induction coil to the substrate unit. The fastening unit includes a fastening element which is guided through the through-flow opening.

Claims

1-13. (canceled)

14. An induction oven device, comprising: a heating unit including an induction coil having an electrical conductor; a substrate unit having a through-flow opening; and a fastening unit configured to fasten the induction coil to the substrate unit, said fastening unit including a fastening element which is guided through the through-flow opening.

15. The induction oven device of claim 15, wherein the substrate unit includes a silicate.

16. The induction oven device of claim 15, wherein the fastening element includes a silicate.

17. The induction oven device of claim 15, wherein the substrate unit is capable of being pierced through, at least partially, in order to fasten the induction coil.

18. The induction oven device of claim 15, wherein the substrate unit is at least partially fibrous.

19. The induction oven device of claim 18, wherein the substrate unit includes a textile structure with a flat shape.

20. The induction oven device of claim 15, wherein the fastening element is embodied as a thread, said induction coil being fastened to the substrate unit via a seam which has the thread.

21. The induction oven device of claim 15, wherein the substrate unit at least partially is made of basalt.

22. The induction oven device of claim 15, wherein the substrate unit at least partially is made of glass fibers.

23. The induction oven device of claim 15, wherein the fastening unit includes a cover element arranged on a side of the induction coil which side lies opposite the substrate unit, said cover element restricting a movement of the induction coil on said side.

24. The induction oven device of claim 23, wherein the cover element includes a silicate.

25. An induction oven, comprising induction oven device, said induction oven comprising a heating unit including an induction coil having an electrical conductor, a substrate unit having a through-flow opening, and a fastening unit configured to fasten the induction coil to the substrate unit, said fastening unit including a fastening element which is guided through the through-flow opening.

26. The induction oven of claim 25, wherein the substrate unit includes a silicate.

27. The induction oven of claim 25, wherein the fastening element includes a silicate.

28. The induction oven of claim 25, wherein the substrate unit is capable of being pierced through, at least partially, in order to fasten the induction coil.

29. The induction oven of claim 25, wherein the substrate unit is at least partially fibrous.

30. The induction oven of claim 29, wherein the substrate unit includes a textile structure with a flat shape.

31. The induction oven of claim 25, wherein the fastening element is embodied as a thread, said induction coil being fastened to the substrate unit via a seam which has the thread.

32. The induction oven of claim 25, wherein the substrate unit at least partially is made of basalt.

33. The induction oven of claim 25, wherein the substrate unit at least partially is made of glass fibers.

34. The induction oven of claim 25, wherein the fastening unit includes a cover element arranged on a side of the induction coil which side lies opposite the substrate unit, said cover element restricting a movement of the induction coil on said side.

35. The induction oven of claim 34, wherein the cover element includes a silicate.

36. A method for producing an induction oven device, said method comprising: guiding a fastening element through an opening of a substrate unit; and fastening an electrical conductor of an induction coil of a heating unit to the substrate unit.

Description

[0029] In the drawings:

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

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

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

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

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

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

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

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

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

[0039] FIG. 7b shows a schematic top view of a part of a cooking appliance device with a further thread at a minimum distance from the side and a thread running at a distance from the opposite side,

[0040] FIG. 7c shows a schematic top view of a part of a cooking appliance device with a further thread running at a distance from the side and a thread at a minimum distance from the opposite side,

[0041] FIG. 8a shows a schematic top view of a cutout of a cooking appliance device with a thread crossing a conductor, which is in contact with the conductor,

[0042] FIG. 8b shows a schematic top view of a cutout of a cooking appliance device with a thread crossing a conductor, which runs at a distance from the conductor in segments, and

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

[0044] Only one of the objects present repeatedly in the figures is provided with a reference character in each case.

[0045] FIG. 1 shows a cooking appliance 30a. The cooking appliance 30a is embodied as an induction oven. The cooking appliance 30a has an outer housing 44a. The outer housing 44a defines an outer contour of the cooking appliance 30a. The outer housing 44a accommodates a user interface 48a of the cooking appliance 30a. The user interface 48a is provided to be operated by an operator in order to control the cooking appliance 30a. The cooking appliance 30a has an inner housing 42a. The inner housing 42a consists of a ferromagnetic metal. Alternatively, the inner housing 42a could have a non-magnetic material, in particular glass, preferably a glass ceramic. In this alternative embodiment, the inner housing 42a has a plurality 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 situated in a closed state. The oven door 46a covers an opening 52a of a cooking compartment 28a, which fully faces an operator. The oven door 46a and the inner housing 42a together outwardly delimit the cooking compartment 28a. The cooking appliance 30a has a cooking appliance device 10a. The cooking appliance device 10a is embodied as an induction oven device.

[0046] One part of the cooking appliance device 10a is shown in more detail in an exploded representation in FIG. 2. The cooking appliance device 10a has the inner housing 42a. The cooking appliance device 10a has two heating units 12a. The heating units 12a are embodied as identical to one another. The heating units 12a are arranged on a top wall 54a and on a bottom wall 56a of the inner housing 42a. Alternatively or additionally it would be conceivable for heating units 12a to be arranged on side walls or a rear wall of the inner housing 42a. Just one of the heating units 12a will now be described.

[0047] The heating unit 12a has an induction coil 14a. During operation of the heating unit 12a, an alternating current flows through the induction coil 14a, which generates an electromagnetic alternating field. The induction coil 14a is embodied in a plate-shaped manner. A main extension plane (not shown) of the induction coil 14a runs in parallel with a main extension plane of the top wall 54a and the bottom wall 56a. The induction coil 14a has 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 insulation. The conductor 16a features aluminum. Alternatively, the conductor 16a could feature copper. The conductor 16a is arranged as a right-angled spiral. The conductor 16a is wound around a coil center 34a of the induction coil 14a.

[0048] The heating unit 12a has an induction coil 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 inner housing 42a. The induction coil 14a rests fully against the substrate unit 18a. The substrate unit 18a serves to thermally and electrically insulate the induction coil 14a. The substrate unit 18a at least for the most part consists of a material which features at least the chemical elements Si and 0. 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 additionally, the substrate unit 18a could have spar fibers, dolomite fibers, diabase fibers, anorthosite fibers and/or coke fibers. The substrate unit 18a can be pierced through, at least partially, in order to fasten the induction coil 14a. The substrate unit 18a fully consists of a textile structure with a flat shape. The substrate unit 18a fully consists of a woven basalt fabric. Alternatively, the substrate unit 18a could partially consist of the woven basalt fabric. The substrate unit 18a has a large number of through-flow openings 24a. The through-flow openings 24a are arranged periodically. The through-flow openings 24a are arranged along a large number of straight lines.

[0049] The heating unit 12a has a fastening unit 20 (see FIG. 3). The fastening unit 20a fastens the induction coil 14a to the substrate unit 18a. The fastening unit 20a fastens the conductor 16a to the substrate unit 18a such that it can move in a region in relation to the substrate unit 18a. In this context, the region extends over the entire extension of the induction coil 14a. The fastening unit 20a has a fastening element 22a. The fastening element 22a is embodied as a thread 22a. The induction coil 14a is fastened to the substrate unit 18a by means of a seam which has the thread 22a. The thread 22a is fully embodied from silicate. The thread 22a is fully embodied from water glass. Alternatively, the thread 22a could consist of mineral wool and/or glass fibers. The thread 22a is guided through a part of the through-flow openings 24a. The thread 22a is guided through the through-flow openings 24a according to a lockstitch stitching method. In a perpendicular view of the substrate unit 18a, the thread 22a runs fully laterally next to the conductor 16a. The thread 22a runs in parallel with the conductor 16a. The thread 22a runs at a distance from the conductor 16a.

[0050] The fastening unit 20a has a further fastening element 32a. The induction coil 14a is fastened to the substrate unit 18a by means of a further seam which has a further thread 32a. The further thread 32a is embodied as 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 through-flow openings 24a. In a perpendicular view of the substrate unit 18a, the further thread 32a runs on a side of the conductor 16a which lies opposite the thread 22a. Before operation of the cooking appliance device 10a, a distance between the thread 22a and the conductor 16a is at least largely identical to a further distance between the further thread 32a and the conductor 16a.

[0051] The fastening unit 20a has a cover element 26a. Alternatively, the fastening unit 20a could have a large number of cover elements 26a. The cover element 26a features a silicate. The cover element 26a has basalt fibers. Alternatively or additionally, the cover element 26a could have spar fibers, dolomite fibers, diabase fibers, anorthosite fibers and/or coke fibers.

[0052] The cover element 26a is embodied as identical to the substrate unit 18a. The cover element 26a is arranged on a side of the induction coil 14a which lies opposite the substrate unit 18a. The cover element 26a and the substrate unit 18a are stitched together within the region. The cover element 26a and the substrate unit 18a are stitched to one another by means of the seam which has the thread 22a. The cover element 26a and the substrate unit 18a are stitched to one another by means of the further seam which has the further thread 32a. The cover element 26a and the substrate unit 18a touch in the region, at least in segments. The cover element 26a and the substrate unit 18a form an end stop with regard to a permitted movement of the conductor 16a. The end stop is formed by the seam and the further seam.

[0053] The induction coil 14a is fully in contact with the cover element 26a. Alternatively, the induction coil 14a could exclusively be in contact with the cover element 26a in the region. 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 end stops, at which the substrate unit 18a and the cover element 26a are stitched. The end stops restrict a movement of the induction coil 14a in parallel with 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 perpendicular to the main extension plane of the induction coil 14a. Permitted movements of the conductor 16a include a movement along a direction 40a facing away from a coil center 34a, which is facing away from the coil center 34a of the induction coil 14a in a perpendicular view of the substrate unit 18a. The length of the permitted movement along the direction 40a is identical to a length by which the conductor 16a stretches during operation of the cooking appliance device 10a. Permitted movements of the conductor 16a include a movement counter to the direction 40a.

[0054] In FIG. 4, the cooking appliance device 10a is shown before operation of the cooking appliance device 10a. For reasons of clarity, the induction coil 14a is represented in a simplified form with a reduced number of windings and an hatched conductor 16a. In addition, the distance of the thread 22a and the further thread 32a from the conductor 16a is shown in a reduced manner. 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 barely accommodates a projection of the induction coil 14a onto the substrate unit 18a. The additional thread 50a fully encircles the induction coil 14a. The additional thread 50a serves to stabilize the substrate unit 18a and the cover element 26a. The conductor 16a experiences thermal expansions during operation of the cooking appliance device 10a. The thermal expansions generate stretching movements of the induction coil 14a in the direction 40a. The stretching movements are movements of the induction coil 14a which are permitted within the region.

[0055] FIG. 5 shows a schematic flow diagram of a method for producing the cooking appliance device 10a. In a 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 Litz wire and/or punching out the conductor 16a from a metal plate (not shown).

[0056] In an insulating step 110a, the induction coil 14a is laid onto the substrate unit 18a and covered by the cover element 26a. In this context, the insulating step 110a follows the winding step 100a.

[0057] In a stitching step 120a, the substrate unit 18a and the cover element 26a are pierced through by a needle. The substrate unit 18a and the cover element 26a are stitched to one another according to the lockstitch stitching method. In this context, the thread 22a is guided through a part of the through-flow openings 24a. Subsequently, the further thread 32a is guided through a further part of the through-flow openings 24a in an identical manner. In this context, the stitching step 120a follows the insulating step 110.

[0058] In an installation step 130a, the heating unit 12a is installed on the inner housing 42a. The heating unit 12a is screwed onto the inner housing 42a. Alternatively, the heating unit 12a could also be clamped and/or riveted onto the inner housing 42a.

[0059] FIGS. 6a to 9 show further exemplary embodiments of the invention. The following descriptions are essentially restricted to the differences between the exemplary embodiments, wherein with regard to components, features and functions which remain the same, reference can be made to the description of the exemplary embodiment in FIGS. 1 to 5. In order to differentiate 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 of FIGS. 6a to 9. With regard to parts that remain the same, in particular with regard to parts with the same reference characters, in principle, reference can also be made to the drawings and/or the description of the exemplary embodiment of FIGS. 1 to 5.

[0060] For the sake of clarity, conductors 16b-g which are covered by cover elements 26b-g in the following figures are represented with hatching.

[0061] In FIGS. 6a-c, a part of cooking appliance devices 10b, 10c, 10d is shown in each case. Induction coils 14b, 14c, 14d of the cooking appliance devices 10b, 10c, 10d are fastened to substrate units 18b, 18c, 18d by means of seams which have threads 22b, 22c, 22d. Cover elements 26b, 26c, 26d are stitched to one another by means of the seams which have the threads 22b, 22c, 22d. In the cooking appliance device 10b, a thread 22b runs along a side of a conductor 16b which is oriented counter to a direction 40b facing away from a coil center (not shown), at a minimum distance from the conductor 16b. The conductor 16b is fastened to the substrate unit 18b such that it largely cannot move counter to the direction 40b. The substrate unit 18b fully consists of glass fibers. In the cooking appliance device 10c, a thread 22c runs along a side of a conductor 16c which is oriented along a direction 40c facing away from a coil center (not shown), at a distance from the conductor 16c. The conductor 16c is fastened to the substrate unit 18c such that it can move along and counter to the direction 40c. In the cooking appliance device 10d, a thread 22d runs along a side of a conductor 16d which is oriented along a direction 40d facing away from a coil center (not shown), at a minimum distance from the conductor 16d. The conductor 16d is fastened to the substrate unit 18d such that it cannot move along the direction 40d.

[0062] In FIGS. 7a-c, a part of cooking appliance devices 10e, 10f, 10g is shown in each case. In the cooking appliance devices 10e, 10f, 10g, threads 22e, 22f, 22g and further threads 32e, 32f, 32g run along opposite sides of conductors 16e, 16f, 16g. In the cooking appliance device 10e, the thread 22e and the further thread 32e run at a minimum distance from the conductor 16e. The conductor 16e is fastened to a substrate unit 18e such that it cannot move along and counter to a direction 40e facing away from a coil center (not shown). In the cooking appliance device 10f, a thread 22f runs at a distance from a conductor 16f. A further thread 32f runs at a minimum distance from the conductor 16f. The conductor 16f is fastened to a substrate unit 18f such that it cannot move counter to a direction 40f facing away from a coil center (not shown). In the cooking appliance device 10g, a thread 22g runs at a minimum distance from a conductor 16g. The thread 32g runs at a distance from a conductor 16g. The conductor 16g is fastened to a substrate unit 18g such that it cannot move along a direction 40g facing away from a coil center (not shown).

[0063] In FIGS. 8a-b, a part of cooking appliance devices 10h, 10i is shown in each case. Induction coils 14h, 14i of the cooking appliance devices 10h, 10i are fully stitched to substrate units 18h, 18i by threads 22h, 22i. In the cooking appliance devices 10h, 10i the thread 22h, 22i runs over a conductor 16h, 16i, at periodic distances in each case. The thread 22h, 22i runs in a zig-zag pattern in each case. Through-flow openings 24h, 24i form turning points of the zig-zag pattern in each case. The threads 22h, 22i are guided through the through-flow openings 24h, 24i according to a zig-zag stitching method in each case. Alternatively, the threads 22h, 22i run in parallel with the conductors 16h, 16i, in segments, in each case. In the cooking appliance device 10h, the conductor 16h is fastened to the substrate unit 18h such that it cannot move along a main extension plane of the induction coil 14h. The conductor 16h is embodied as a Litz wire. In the cooking appliance device 10i, a portion of the through-flow openings 24i run at a distance from the conductor 16i. Said portion of the through-flow openings 24i are arranged on a side of the conductor 16i which is oriented along a direction 40i facing away from a coil center (not shown). The conductor 16i is fastened to the substrate unit 18i such that it cannot move counter to the direction 40i. The cooking appliance devices 10h, 10i have no cover elements. The seams which have the threads 22h, 22i stitch the induction coils 14h, 14i to one of the substrate units 18h, 18i in each case.

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

[0065] In an embroidery step 150i, the induction coil 14i is simultaneously wound while the thread 22i is guided through the through-flow openings 24i according to the zig-zag stitching method. In this context, the embroidery step 150i follows the positioning step 140i.

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

REFERENCE CHARACTERS

[0067] 10 Cooking appliance device [0068] 12 Heating unit [0069] 14 Induction coil [0070] 16 Conductor [0071] 18 Substrate unit [0072] 20 Fastening unit [0073] 22 Thread [0074] 24 Through-flow opening [0075] 26 Cover element [0076] 28 Cooking compartment [0077] 30 Cooking appliance [0078] 32 Thread [0079] 34 Coil center [0080] 40 Direction [0081] 42 Inner housing [0082] 44 Outer housing [0083] 46 Oven door [0084] 48 User interface [0085] 50 Thread [0086] 52 Opening [0087] 54 Top wall [0088] 56 Bottom wall [0089] 100 Winding step [0090] 110 Insulating step [0091] 120 Stitching step [0092] 130 Installation step [0093] 140 Positioning step [0094] 150 Embroidery step [0095] 160 Installation step