EP4221462A1 - Bobine d'induction pour chauffer un vaisselle, table de cuisson à induction et système de table de cuisson - Google Patents

Bobine d'induction pour chauffer un vaisselle, table de cuisson à induction et système de table de cuisson Download PDF

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Publication number
EP4221462A1
EP4221462A1 EP23153498.3A EP23153498A EP4221462A1 EP 4221462 A1 EP4221462 A1 EP 4221462A1 EP 23153498 A EP23153498 A EP 23153498A EP 4221462 A1 EP4221462 A1 EP 4221462A1
Authority
EP
European Patent Office
Prior art keywords
coil
winding
induction
maximum
induction coil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP23153498.3A
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German (de)
English (en)
Inventor
Anton SCHMÖLLER
Leonard Vogl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bora Vertriebs GmbH and Co KG
Original Assignee
Bora Vertriebs GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bora Vertriebs GmbH and Co KG filed Critical Bora Vertriebs GmbH and Co KG
Publication of EP4221462A1 publication Critical patent/EP4221462A1/fr
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12—Cooking devices
    • H05B6/1209—Cooking devices induction cooking plates or the like and devices to be used in combination with them
    • H05B6/1245—Cooking devices induction cooking plates or the like and devices to be used in combination with them with special coil arrangements
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12—Cooking devices
    • H05B6/1209—Cooking devices induction cooking plates or the like and devices to be used in combination with them
    • H05B6/1245—Cooking devices induction cooking plates or the like and devices to be used in combination with them with special coil arrangements
    • H05B6/1272—Cooking devices induction cooking plates or the like and devices to be used in combination with them with special coil arrangements with more than one coil or coil segment per heating zone
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B77/00—Kitchen cabinets
    • A47B77/04—Provision for particular uses of compartments or other parts ; Compartments moving up and down, revolving parts
    • A47B77/08—Provision for particular uses of compartments or other parts ; Compartments moving up and down, revolving parts for incorporating apparatus operated by power, including water power; for incorporating apparatus for cooking, cooling, or laundry purposes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/20—Removing cooking fumes
    • F24C15/2042—Devices for removing cooking fumes structurally associated with a cooking range e.g. downdraft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/06—Arrangement or mounting of electric heating elements
    • F24C7/067—Arrangement or mounting of electric heating elements on ranges
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12—Cooking devices
    • H05B6/1209—Cooking devices induction cooking plates or the like and devices to be used in combination with them
    • H05B6/1245—Cooking devices induction cooking plates or the like and devices to be used in combination with them with special coil arrangements
    • H05B6/1281—Cooking devices induction cooking plates or the like and devices to be used in combination with them with special coil arrangements with flat coils
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/36—Coil arrangements
    • H05B6/362—Coil arrangements with flat coil conductors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/36—Coil arrangements
    • H05B6/44—Coil arrangements having more than one coil or coil segment
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2206/00—Aspects relating to heating by electric, magnetic, or electromagnetic fields covered by group H05B6/00
    • H05B2206/02—Induction heating
    • H05B2206/022—Special supports for the induction coils

Definitions

  • the invention relates to an induction coil for heating cookware. Furthermore, the invention relates to an induction hob with such an induction coil. The invention also relates to a hob system with such an induction hob.
  • an induction coil for heating cookware is known. Apart from the rounded corner areas, the induction coil has a rectangular outer contour. The heating power that can be provided with such induction coils is not evenly distributed over an area to be heated. As a result, the cookware is heated unevenly. The energy efficiency of an induction hob designed with this induction coil is reduced and the cooking process is made more difficult, particularly if the food to be prepared is to be fried evenly.
  • the induction coil for heating cookware with the features of claim 1.
  • the induction coil comprises a winding group with at least two coil windings, preferably running around a coil axis, for generating a magnetic field.
  • the winding group can have at least one intermediate section, which is delimited in a circumferential direction around the coil axis by two adjacent maxima of the radial extension of an outer contour of the winding group.
  • winding spacing can have at least one spacing maximum within the intermediate section.
  • the winding spacing within the intermediate section can be reduced along the circumferential direction on both sides of the spacing maximum.
  • the radial extent of the winding group can decrease.
  • a change in the density of the coil windings can lead to an uneven distribution of the heat output over an area to be heated.
  • the density of the coil turns is preferably determined as the quotient of a number of coil turns over an extension of the induction coil, in particular in the radial direction, in particular in relation to the coil axis, in particular starting from the coil axis.
  • the maximum distance between two of the coil windings of the winding group is arranged in the circumferential direction between the maxima of the radial extent, the density of the coil windings in in this area, particularly in the intermediate section.
  • An increased power output in this area, in particular in a central area of the intermediate section, in particular in relation to the circumferential position of the maxima of the radial extent, can be avoided as a result.
  • the arrangement of the maximum distance in the intermediate section, in particular in a central region of the intermediate section ensures particularly uniform heating of a hotplate or the cooking utensil arranged thereon, in particular if the shape of the hotplate and/or a surface on which the cooking utensil is placed deviates from a circular shape.
  • At least one of the coil windings has, at least in sections, an angle change of at least 100°, in particular at least 120°, in particular at least 150°, in particular at least 180°, over a winding length of at most 50 mm, in particular a maximum of 40 mm, in particular a maximum of 30 mm, in particular a maximum of 20 mm.
  • the correspondingly strong curvature of the at least one coil turn ensures that the magnetic field generated can be influenced precisely, in particular with high local resolution.
  • the heating output can be increased in the area of a maximum of the radial extension, in particular in a corner area of the polygonal outer contour, as a result of which heating output maxima in an area of reduced radial extension of the outer contour, in particular in a side area of the polygonal outer contour, can be reduced.
  • the induction coil has at least one radially outer and at least one radially inner coil turn with regard to the at least one distance maximum.
  • the induction coil preferably comprises at least two, in particular at least three, in particular at least five, in particular at least 10, coil windings lying radially on the inside and/or radially on the outside with regard to the at least one distance maximum.
  • the induction coil can have a maximum of 10, in particular a maximum of 7, in particular a maximum of 5, in particular a maximum of 3, in particular a maximum of 2, in particular a single, radially inner and/or radially outer coil winding with regard to the at least one maximum distance.
  • the at least one coil turn that is on the outside with respect to the at least one distance maximum can be referred to as the first subgroup of turns.
  • the at least one coil turn that is on the inside with respect to the at least one distance maximum can be referred to as the second subgroup of turns.
  • the at least two coil windings between which the maximum distance is present are preferably arranged directly adjacent to one another and/or separated from one another by a maximum of five, in particular a maximum of three, in particular a maximum of two, in particular a maximum of one, intermediate coil turns.
  • a maximum of 70% in particular a maximum of 60%, in particular a maximum of 50%, in particular a maximum of 40%, in particular a maximum of 30%, in particular a maximum of 20%, in particular a maximum of 10%, and/or at least 5 %, in particular at least 10%, in particular at least 20%, in particular at least 30%, in particular at least 40%, in particular at least 50%, of the total number of coil turns of the induction coil.
  • a small number of external coil windings ensures that the heat output distribution over the area to be heated can be influenced in a particularly flexible manner.
  • a high number of outer coil windings ensures an even heat output distribution in the area of the outer contour of the induction coil.
  • At least two coil windings of the induction coil are at a constant distance from one another in the circumferential direction across the distance maximum, in particular at least in sections, in particular completely, over their longitudinal extent.
  • the at least two coil windings can be arranged radially on the inside and/or radially on the outside with respect to the at least one maximum distance.
  • This constant distance is preferably a maximum of 100%, in particular a maximum of 60%, in particular a maximum of 50%, in particular a maximum of 40%, in particular a maximum of 30%, in particular a maximum of 20%, in particular a maximum of 10% of the transverse extent of the respective coil turn.
  • the at least two coil windings preferably touch one another at least in sections, in particular completely along their length.
  • At least two, in particular at least five, in particular at least ten, in particular at least fifteen, of the coil turns can each cover a range of at least 20%, in particular at least 40%, in particular at least 50%, in particular at least 60%, in particular at least 70%, in particular at least 80%, in particular at least 90%, of their longitudinal extent at a distance from one another of at most 100%, in particular at most 80%, in particular at most 60%, in particular at most 50, in particular at most 40%, in particular at most 20%, in particular at most 10 %, have their transverse extent.
  • the at least two coil windings can be arranged radially on the inside and/or radially on the outside with respect to the at least one maximum distance.
  • the outer contour of the induction coil in particular in a main extension plane, preferably deviates from a circular shape.
  • the main extension plane of the induction coil is understood to mean a plane that is spanned by the two longest dimensions of the induction coil, in particular the winding group, which are perpendicular to one another.
  • the main plane of extent is preferably oriented parallel to a cooking zone plane, in particular a main plane of extent of a cooking utensil support.
  • the winding spacing is the shortest path between two coil windings.
  • the turn spacing may vary along the path of these coil turns.
  • the maximum of the winding distance can be a local or a global maximum. The same applies to a corresponding minimum.
  • a saddle point is not considered a maximum or minimum. No further maximum is arranged between two consecutive or two adjacent maxima. The successive maxima are in particular the maxima that are closest to one another.
  • the coil windings of the winding group in particular of the induction coil, preferably revolve around a common center.
  • the center can be determined by a geometric centroid of the winding group, in particular the induction coil.
  • the coil axis preferably runs through this center.
  • the coil axis can be oriented perpendicular to the main plane of extension.
  • the coil windings preferably encircle the coil axis in a ring.
  • dimensions given below are preferably based on the main extension plane of the induction coil, in particular an orthogonal projection on the main extension plane.
  • the induction coil is preferably designed to heat a single hotplate.
  • the induction coil may have a single center.
  • the induction coil is designed in one piece.
  • the group of windings, in particular the induction coil can consist of a single coil conductor which is cohesively coherent and in particular has no branches.
  • connection means in particular with connection lines and connection connectors, is preferably not part of the induction coil.
  • the connection means, in particular the connection lines can be recognized in particular by the fact that they do not follow the regular geometry of the induction coil, in particular the course of the coil windings around the coil axis.
  • a maximum of the radial extension of the outer contour of the winding group is at least 20% larger, in particular at least 30% larger, in particular at least 40% larger, in particular at least 50% larger, and/or at most 100% larger, as a minimum of the radial extension of the outer contour of the winding group.
  • the shape of such an induction coil deviates particularly strongly from a circular shape.
  • the number of coil turns of the induction coil, in particular of the winding group is in a range from 5 to 40, in particular from 10 to 35, in particular from 15 to 30, in particular from 20 to 25, in particular 22 the induction coil has an inductance in a range from 10 ⁇ H to 500 ⁇ H, in particular from 20 ⁇ H to 200 ⁇ H, in particular from 40 ⁇ H to 100 ⁇ H, in particular from 50 ⁇ H to 70 ⁇ H.
  • the winding group in particular the induction coil, preferably has a maximum of ten, in particular a maximum of eight, in particular a maximum of six, in particular a maximum of four, in particular a maximum of three, in particular exactly two connection lines. With only two connected loads, the wiring in the winding group, in particular the induction coil, is possible in a particularly simple manner.
  • the coil windings of the winding group in particular all coil windings of the induction coil, in particular the coil conductor, can be a material with a specific resistance of at most 0.1 ⁇ mm 2 /m, in particular at most 0.05 ⁇ mm 2 /m, in particular at most 0.02 ⁇ mm 2 / m, and/or aluminum and/or copper, in particular consist of it.
  • ferrites are arranged on the induction coil.
  • the ferrites ensure a particularly even distribution of the power output over a cooking surface.
  • the ferrites can be arranged in a star shape. In a plan view, the ferrites preferably overlap the maxima of the radial extension of the outer contour of the winding group.
  • the arrangement of the ferrites can according to the relevant disclosure of EP 3 383 138 A1 be elected.
  • An independent aspect of the invention that can nevertheless be combined with the other features of the induction coil relates to the design of the induction coil in such a way that a particularly uniform distribution of the magnetic flux density is brought about, particularly on the cooking utensil to be heated, particularly on a cooking surface.
  • the induction coil is preferably designed in such a way that a maximum of the induced magnetic flux density over a continuous circumferential angular range of at least 90°, in particular at least 180°, in particular at least 270°, in particular at least 330°, in particular in every circumferential position around the coil axis, in particular in a measuring plane oriented parallel to the main extension plane, in particular spaced apart from the main extension plane, in particular in a cooking area plane, from a global maximum of the induced magnetic flux density by a maximum of 50%, in particular a maximum of 30%, in particular a maximum of 20%, in particular a maximum of 10%, in particular a maximum of 5%, deviates.
  • the measuring plane is preferably arranged above the main plane of extension and/or at a distance of 5 mm to 50 mm from the main plane of extension.
  • a particularly uniform delivery of heating power can be brought about in the circumferential direction around the coil axis.
  • the magnetic flux density is preferably recorded without cooking utensils.
  • the correspondingly uniform magnetic flux density is preferably achieved at least by an induction heating unit having the induction coil and the ferrites.
  • the at least one maximum distance is in a circumferential angle range around the coil axis from -45° to +45°, in particular from -30° to +30°, in particular from -20° to +20°, in particular from -10 ° to +10 °, in particular centrally, arranged from the circumferential position of a minimum of the radial extent of the outer contour of the winding group.
  • the distance maximum can be arranged centrally or eccentrically between the maxima of the radial extension.
  • the winding spacing is on both sides of the maximum spacing, in particular within the intermediate section, by at least 10%, in particular at least 20%, in particular at least 30%, in particular at least 50%, and/or at most 90% compared to the maximum spacing reduced.
  • the maximum distance is preferably in a range from 1 mm to 75 mm, in particular from 2 mm to 50 mm, in particular from 3 mm to 40 mm, in particular from 4 mm to 20 mm, in particular from 5 mm to 10 mm.
  • At least one, in particular at least two, in particular at least three, in particular at least five, in particular at least ten, of the coil turns has a concave shape.
  • the concave shape is preferably present at least in sections.
  • the concave shape can be present in particular with respect to an area enclosed by the coil turn.
  • at least one of the coil turns is non-concave in shape.
  • the concave shape ensures a particularly even distribution of the density of the coil windings and/or the heating power.
  • a second coil turn has a more convex shape at the circumferential position of the concave shape of a first coil turn.
  • the second coil turn is preferably further outward in the radial direction with respect to the coil axis than the first coil turn. This advantageously achieves that the density of the coil turns and the heat output distribution can be made particularly uniform.
  • the winding group in particular the induction coil, in particular an outer contour and/or a smallest convex envelope of the outermost coil turn, in particular apart from corner regions, has a polygonal, in particular a hexagonal or a quadrangular or a triangular shape, in particular an orthogonal projection onto the main extension plane.
  • the shape preferably corresponds to that of a regular polygon, in particular a regular hexagon or a regular square or a regular triangle.
  • Induction coils of this type can be integrated particularly easily into an induction hob, in particular arranged adjacent to one another in a space-saving manner and/or coupled to one another for heating larger areas, in particular interconnected.
  • the corner areas can be rounded, in particular have radii. This makes it easier to manufacture the winding group, in particular the induction coil.
  • At least 30%, in particular at least 40%, in particular at least 50%, in particular at least 60%, in particular at least 70%, in particular at least 80%, in particular at least 90%, in particular at least 95%, of the total number of coil turns of the Induction coils have a constant distance from at least one, in particular directly adjacent, coil winding over a range of at least 30%, in particular at least 50%, in particular at least 70%, in particular at least 80%, in particular at least 90%, of their longitudinal extent, in particular to both directly adjacent coil turns, provided it is not the first or last coil turn.
  • These coil windings can be arranged radially on the inside and/or radially on the outside with respect to the at least one maximum distance.
  • a smallest convex envelope of the winding group is rectangular, in particular square, in particular apart from corner regions.
  • An aspect ratio of the underlying rectangular shape is preferably in a range from 1:1 to 3:1, in particular from 1.1:1 to 2.5:1, in particular from 1.2:1 to 2:1, in particular from 1, 4:1 to 1.8:1.
  • Induction coils of this type ensure particularly uniform heating of standard cookware, in particular alone and/or in an operating state coupled with another induction coil.
  • a maximum dimension of the outer contour of the winding group, in particular of the induction coil, in particular in an orthogonal projection onto its main extension plane is preferably in a range from 20 mm to 500 mm, in particular from 50 mm to 400 mm, in particular from 75 mm to 350 mm, in particular from 100 mm to 300 mm, in particular from 150 mm to 250 mm, in particular from 180 mm to 220 mm.
  • the winding group of the induction coil has a first winding subgroup with at least one coil winding and a second winding subgroup with at least one other coil winding.
  • the outer contours of the two winding subgroups preferably have different basic shapes. Different basic forms exist if they are not characterized by scaling are interchangeable.
  • the basic shapes of the two groups of turns can differ in the number of corners of their smallest convex envelope, particularly in the main plane of extent.
  • the at least one coil winding of the first winding subgroup is exclusively convex and/or straight.
  • the winding group in particular the second winding subgroup, has at least one coil winding with an at least partially concave shape. Due to the concave shape of the at least one coil winding, a particularly uniform distribution of the density of the coil windings and/or a particularly uniform distribution of the heating power over the hotplate surface can be brought about.
  • a circumferential angular range of the convex and/or straight section of the first partial coil group overlaps at least in sections, in particular completely, with the circumferential angular range of the concave shape of the second partial coil group.
  • the first group of turns is preferably further outward than the second group of turns with respect to the coil axis.
  • all of the coil turns of the first group of turns can enclose all of the coil turns of the second group of turns, in particular in an orthogonal projection onto the main extension plane.
  • a width of the winding group, in particular of the induction coil varies in the radial direction around the coil axis, between an outermost coil turn and an innermost coil turn, during a complete revolution around the coil axis by a maximum of 50%, in particular a maximum of 40%, in particular a maximum of 30 %, in particular a maximum of 20%, in particular a maximum of 10%, in particular a maximum of 5%.
  • This has the advantage that the density of the coil windings is very uniform around the coil axis.
  • the first winding subgroup comprises 10% to 90%, in particular 30% to 80%, in particular 50% to 70%, of the total number of coil turns of the induction coil.
  • the second winding subgroup comprises 10% to 90%, in particular 20% to 70%, in particular 30% to 50%, of the total number of coil turns of the induction coil.
  • the induction coil has at least two, in particular at least three, in particular at least four, in particular at least five, in particular at least six, in particular at least seven, partial winding groups each having at least one, in particular at least two, in particular at least three, coil windings.
  • immediately adjacent subgroups of turns differ in terms of their outer contour and/or their inner contour, with the different contours preferably not being able to be converted into one another by scaling.
  • the multiple winding subgroups can each have correspondingly different contours.
  • the winding group comprises at least two, in particular at least five, in particular at least ten, in particular at least fifteen, in particular at least twenty and/or at least 10%, in particular at least 30%, in particular at least 50%, in particular at least 75%, in particular at least 90%, in particular 100%, of the total number of coil turns of the induction coil.
  • the coil windings have a flat strip, in particular they consist of it.
  • the fact that the at least one coil turn of an induction coil can be in the form of a flat strip relates to a particular, in particular independent, aspect of the invention.
  • the invention is directed in particular to an induction coil with a coil winding designed as a flat strip.
  • the cross section of the flat strip can be rectangular, in particular square or non-square, or oval.
  • the flat strip preferably has a dimensional ratio between a maximum dimension and a transverse dimension oriented perpendicular thereto in the range from 1:1 to 10:1, in particular from 1.5:1 to 5:1, in particular from 2:1 to 4:1, on.
  • the ribbon can be solid.
  • the flat band can be designed as a fabric band or as a braided band.
  • the at least one coil turn can have a radius of curvature of at most 30 mm, in particular at most 20 mm, in particular at most 10 mm, in particular at most 5 mm, in particular at most 2 mm.
  • the at least one coil turn has an angle change of at least 90°, in particular more than 90°, in particular at least 100°, in particular at least 120°, in particular at least 130°, in particular in sections at least 180°, over a winding length of a maximum of 50 mm, in particular a maximum of 40 mm, in particular a maximum of 30 mm, in particular a maximum of 25 mm, in particular a maximum of 20 mm, in particular a maximum of 15 mm, in particular a maximum of 10 mm, in particular a maximum of 5 mm.
  • This aspect of the invention is in particular independent of the other features of the induction coil mentioned above.
  • the invention relates in particular to an induction coil with at least one such coil turn.
  • Another object of the invention is to improve an induction heating unit.
  • the induction heating unit preferably has at least one ferrite and/or a connection means for connecting the induction coil to power electronics.
  • the induction heating unit may include a bobbin for supporting the induction coil.
  • the coil support can be designed in particular to dissipate heat from the induction coil.
  • the coil carrier can have a material with a thermal conductivity of at least 25 W/mK, in particular at least 50 W/mK, in particular at least 75 W/mK, in particular at least 100 W/mK, in particular at least 200 W/mK.
  • the induction heating unit is preferably further developed with at least one of the features that are described above in connection with the induction coil. The Advantages of the induction heating unit correspond to the advantages of the induction coil described above.
  • the invention is also based on the object of creating an improved induction hob.
  • This object is achieved by an induction hob with at least one induction coil as described above.
  • the induction hob can have a cooking utensil holder.
  • the cooking utensil support can include at least one hotplate.
  • the hotplate is preferably marked on the cooking utensil support, in particular by means of an engraving and/or an imprint.
  • the induction hob is preferably further developed with at least one of the features that are described above in connection with the induction coil.
  • the advantages of the induction hob correspond to the advantages of the induction coil.
  • the induction hob preferably has at least one induction heating unit with the induction coil.
  • the induction hob ensures that cookware is heated with a particularly even heat output distribution over the cooking surface. This advantageously means that the cooking utensil can be heated in a particularly energy-efficient manner and the cooking result can be improved.
  • the induction hob has power electronics for supplying the at least one induction coil with electrical power.
  • the power electronics can have at least one induction generator.
  • the power electronics are designed to supply the induction coil with an AC voltage.
  • the power electronics can supply at least two, in particular at least three, in particular at least four, in particular at least six, in particular at least eight, in particular at least ten, and/or a maximum of twenty, in particular a maximum of ten, of the induction coils can be designed with electrical power.
  • the induction hob has a control device for the coupled operation of at least two of the induction coils.
  • the control device and the power electronics can be integrated into one component.
  • the coupling can take place in such a way that the at least two induction coils are operated with the same electrical power and/or are operated to bring about the same heating power per heating surface and/or that they are operated to bring about the same cooking temperature.
  • the at least two induction coils that can be coupled are preferably at a distance of no more than 50 mm, in particular no more than 40 mm, in particular no more than 30 mm, in particular no more than 20 mm, in particular no more than 10 mm.
  • the distance between two of the induction coils that can be operated coupled is preferably a maximum of 20%, in particular a maximum of 10%, in particular a maximum of 5%, in particular a maximum of 2%, of the maximum extent of the respective induction coils. This advantageously means that there is no unheatable area between the two induction coils.
  • the at least two induction coils which can be operated in a coupled manner preferably have straight sides which are arranged adjacent to one another and/or are oriented parallel to one another.
  • At least two, in particular at least three, in particular at least four, in particular at least eight, of the induction coils can be operated in a coupled manner by means of the control device.
  • the coupled operable induction coils along a first direction and / or positioned, in particular spaced apart, along a second direction linearly independent of the first direction.
  • the induction coils, which can be operated in a coupled manner are preferably arranged in a grid-like manner along a line or in a plane.
  • Another object of the invention is to provide an improved cooktop system.
  • the hob system preferably includes a device for extracting cooking vapors, in particular downwards.
  • the hob system is preferably further developed with at least one of the features that are described above in connection with the induction coil and/or the induction hob.
  • the advantages of the hob system correspond to the advantages of the induction coil and/or the induction hob.
  • a vertical overall dimension of the device for extracting cooking vapors, in particular the hob system is preferably a maximum of 300 mm, in particular a maximum of 250 mm, in particular a maximum of 200 mm, in particular a maximum of 150 mm, in particular a maximum of 100 mm.
  • the device for extracting cooking vapors preferably comprises at least one inflow opening, at least one vacuum channel section and/or at least one cooking vapor fan.
  • the at least one cooking vapor fan is preferably in fluid-conducting connection with the at least one inflow opening via the at least one vacuum channel section.
  • the hob system 1 includes a device 2 for extracting cooking vapors, which is also referred to below as an extractor device 2, and an induction hob 3 for heating cookware 4, 5.
  • the cookware 4, 5 includes a pot 4, in particular with a circular installation surface, and a roaster 5, especially with a rectangular footprint.
  • the extractor device 2 is designed to extract cooking vapors downwards.
  • the main extension plane of an inflow opening 6 of the fume extraction device 2 is oriented obliquely, in particular perpendicularly, to a vertical direction.
  • An intake grille 7 overlaps the inflow opening 6 in a plan view. The intake grille 7 can be removed from the inflow opening 6 in a reversible manner, in particular without tools.
  • the extractor device 2 includes a cooking vapor fan, not shown.
  • the cooking vapor fan is connected in a flow-conducting manner to the inflow opening via a vacuum channel section.
  • a vertical overall height of the vapor extraction device, in particular comprising the inflow opening, the vacuum channel section and the cooking vapor fan, in particular of the hob system 1, is preferably a maximum of 300 mm, in particular a maximum of 250 mm, in particular a maximum of 200 mm, in particular a maximum of 175 mm, in particular a maximum of 150 mm.
  • the hob system 1 has a user interface 8 for controlling the vapor extraction device 2 and the induction hob 3 .
  • the user interface 8 includes a touch-sensitive screen for inputting and outputting control information.
  • the hob system 1 includes a control device, not shown.
  • the control device is designed to control the vapor extraction device 2 and the induction hob 3 and is connected to them in a signal-transmitting manner.
  • the hob system 1 is inserted into a hob system recess 9 in a kitchen worktop 10 .
  • the kitchen worktop 10 is part of a kitchen base cabinet 11.
  • the hob system 1 is arranged on the kitchen worktop 10 in such a way that a surface of the hob system 1, in particular a footprint 12 of a cooking utensil support 13 of the induction hob 3, is arranged flush with a surface of the kitchen worktop 10.
  • the induction hob 3 comprises the cooking utensil support 13.
  • the cooking utensil support 13 is designed as a flat plate, in particular as a glass ceramic plate, in particular comprising borosilicate glass.
  • the inflow opening 6 is designed as a recess penetrating the cooking utensil support 13 .
  • the cooking utensil support 13 completely encloses the inflow opening 6 .
  • the cooking utensil support 13 overlaps the user interface 8 completely. In particular, the cooking utensil support 13 forms a touch-sensitive surface of the user interface 8 .
  • the induction hob 3 has four hotplates 14 .
  • the cooking utensil support 13 has markings 15 for identifying the arrangement, in particular the dimensions, of the hotplates 14 .
  • the induction hob 3 has an induction coil 16 for each hotplate 14 .
  • the induction coils 16 are arranged underneath the cooking utensil support 13 .
  • the induction coils 16 are arranged in such a way that they can heat the cookware 4 , 5 arranged in the region of the hotplates 14 , in particular overlapping the hotplates 14 , in particular set up at least in sections within the markings 15 .
  • the four induction coils 16 are of identical design.
  • the induction hob 3 has power electronics (not shown), in particular having at least one induction generator.
  • the power electronics are designed in particular to supply the induction coils 16 with AC voltage.
  • the power electronics are in line with the Induction coils 16 in power-transmitting connection.
  • the power electronics are in signal-transmitting connection with the control device.
  • the induction heating unit 17 comprises a coil support 18 on which the induction coil 16 is attached.
  • the induction heating unit 17 includes a cooking utensil sensor 19 and a temperature sensor 20.
  • the cooking utensil sensor 19 is designed to detect whether cooking utensil 4, 5 is arranged on the hotplate 14 that is assigned to the associated induction heating unit 17.
  • the temperature sensor 20 is designed to detect a temperature of a base of the cooking utensil 4, 5 and/or the shelf 12 in the area of the hotplate 14.
  • a sensor connection means 21 is used to establish a wired, signal-transmitting connection between the cooking utensil sensor 19 and the temperature sensor 20 with the control device.
  • the coil carrier 18 comprises a material with a high thermal conductivity, in particular at least 50 W/mK, in particular at least 100 W/mK, in particular at least 150 W/mK, in particular at least 200 W/mK.
  • the coil support 18 is arranged below the induction coil 16 in the vertical direction.
  • the induction heating unit 17 has ferrites 22 which are designed to influence the magnetic field generated by the induction coil 16, in particular to make it more uniform.
  • the ferrites 22 are arranged underneath the coil carrier 18 .
  • the ferrites 22 are preferably arranged in a star shape in a plan view.
  • the induction heating unit 17 has a base support 23 .
  • the base support 23 is arranged below the ferrites 22 .
  • the ferrites 22 are arranged between the coil carrier 18 and the base body 23 .
  • Spring elements 24 are designed for the mechanically and/or thermally decoupled attachment of the induction heating unit 17 to a hob support (not shown) and/or a hob housing. The spring elements 24 are attached to the base body 23 .
  • the induction coil 16 has a connection means 25 .
  • the connection means 25 is designed for a power-transmitting connection to the power electronics.
  • the connection means 25 comprises two connection lines 26a, 26b and two connection connectors 27a, 27b, in particular cable lugs.
  • the connection lines 26a, 26b extend between the connection connectors 27a, 27b and the induction coil 16.
  • the induction coil 16 includes coil windings 28 which generate a magnetic field when current flows through them. Preferably, twenty-two of the coil turns 28 are provided.
  • the induction coil 16 has a total of two coil terminals 29 .
  • the connection means 25, in particular the connection lines 26a, 26b, can be connected to two coil connections 29.
  • the coil turns 28 run around a coil axis 30.
  • each of the coil turns 28 runs around the coil axis 30 exactly once.
  • the coil axis 30 preferably runs through a geometric centroid of the induction coil 16.
  • the coil axis 30 is perpendicular to a main extension plane 31 of the induction coil 16.
  • the main extension plane 31 is oriented parallel to the floor space 12 of the respective hotplate 14 .
  • the coil axis 30 is oriented perpendicularly to the footprint 12 and/or vertically.
  • a winding group 32 comprises at least two of the coil windings 28.
  • the winding group 32 can comprise all or just a part, ie not all, of the coil windings 28 of the induction coil 16 and/or of the coil windings 28 assigned to a hotplate 14.
  • the winding group 32 comprises the outermost twenty coil windings 28 in a radial direction to the coil axis 30.
  • the winding group 32 comprises a first winding sub-group 33 and a second winding sub-group 34.
  • the winding group 32 can consist of the two winding sub-groups 33, 34.
  • the winding part groups 33, 34 do not have any common coil windings 28.
  • the first sub-winding group 33 includes the outermost 13 coil turns 28 .
  • the second sub-winding group 34 includes 7 coil turns 28 which are closest to the coil turns 28 of the first sub-winding group 33 .
  • a smallest convex envelope 35 of the winding group 32 is determined in the main extension plane 31 by an outer contour of the outermost coil winding 28a of the winding group 32 .
  • the outer contour of the winding group 32, in particular the smallest convex envelope 35 is polygonal, in particular square, in particular rectangular. in particular square, apart from corner regions 36.
  • a side length of the square outer contour of the winding group 32, in particular of the induction coil 16, is 200 mm.
  • the corner areas 36 of the polygonal smallest convex envelope 35 are rounded.
  • the rounding of the corner areas facilitates the production of the induction coil 16.
  • a minimum radius of curvature of a coil conductor 37 formed into the induction coil 16 can thus be easily and reliably maintained.
  • the winding group 32 has a radial extent r, which is measured in the radial direction, starting from the coil axis 30, towards an outer contour of the winding group 32.
  • the radial extent r of the winding group 32 can also be determined by the radial distance between the coil axis 30 and the smallest convex envelope 35.
  • the radial extent r varies depending on a circumferential position ⁇ around the coil axis 30.
  • the winding group 32 has a maximum r max of the radial extension r of the outer contour.
  • a minimum r min of the radial extension r of the outer contour is centered between the corner positions, in particular centered between the maxima r max of the radial extension r, in particular centered on the sides of the polygonal outer contour, of the winding group 32 .
  • the intermediate section 38 of the winding group 32 is that section which in the circumferential direction ⁇ around the coil axis 30 is limited by two consecutive maxima r max of the radial extension r.
  • the induction coil 16, in particular the winding group 32, comprises four of the intermediate sections 38.
  • Each intermediate section 38 extends in particular over a sector which is spanned between the circumferential positions of the corners of the polygonal winding group 32 around the coil axis 30 .
  • Each sector preferably covers an angular range of 90°.
  • a third winding group 39 comprises two circular coil windings 28.
  • the coil windings 28 of the third winding group 39 are the two innermost coil windings 28 of the induction coil 16.
  • the coil windings 28 of the third winding group 39 are not part of the winding group 32.
  • the winding spacing d is measured along the respective coil winding 28 as the smallest spacing between the two coil windings 28.
  • the winding spacing d is preferably measured between two immediately adjacent coil windings 28.
  • the winding distance d is constant, in particular essentially equal to zero.
  • the winding spacing d varies in the circumferential direction ⁇ between the coil windings 28 of the second winding subgroup 34 .
  • the winding distance d varies along the Circumferential direction ⁇ , in particular along this coil turns 28.
  • a maximum distance d max is within the respective intermediate section 38 before.
  • the winding spacing d decreases on both sides from the respective maximum spacing d max , in particular to a minimum spacing d min .
  • the maximum distance d max is in particular in the circumferential direction ⁇ in the middle of the respective intermediate section 38 , in particular in the middle on the sides of the polygonal outer contour of the winding group 32 .
  • the maximum distance d max is between two adjacent maxima r max of the radial extent r.
  • the respective maximum distance d max is in the circumferential direction ⁇ around the coil axis 30 in a circumferential angle range ⁇ from -45° to +45°, in particular from -30° to +30°, in particular from -20° to +20°, in particular at 0° , with respect to the circumferential position of the minimum r min of the radial extension r of the outer contour of the winding group 32 before.
  • the maximum distance d max is 20 mm.
  • the minimum distance d min is 8 mm.
  • the tapering of the winding spacing d on both sides from the maximum spacing d max is at least 20%, in particular at least 40%, in particular 60%, of the maximum spacing d max .
  • the coil windings 28 of the first winding subgroup 33 have, in particular exclusively, convex and straight sections.
  • the coil turns 28 of the second sub-winding group 34 have concave and convex sections.
  • the innermost coil turn 28 of the inner turn sub-group 33 has a more convex shape, particularly a rectilinear shape, at the circumferential position ⁇ of the concave portion of the coil turns 28 of the second turn sub-group 34 .
  • the outer contour of the first winding part group 33, in particular its outermost coil winding 28a, is square, in particular with rounded corners.
  • the smallest convex envelope of the second winding subgroup 34 is square in an orthogonal projection onto the main extension plane 31, in particular with rounded corners.
  • the outer contour of the second winding subgroup 34, in particular its outermost coil winding 28b, is star-shaped, with the corners of the star tips lying on the corner points of a square and the sides between the star tips being arcuately concave, in particular tapered.
  • the basic shapes of the outer contours of the partial winding groups 33, 34 are therefore different.
  • a width b of the winding group 32 is determined by the radial extension of the winding group 32 between an outer contour of the outermost coil turn 28a and an inner contour of the innermost coil turn 28c.
  • the width b varies by a maximum of 30%, in particular by a maximum of 20%, in particular by a maximum of 15%, in particular by 10%, with respect to a maximum width b max of the winding group 32.
  • the coil conductor 37 is designed as a flat strip, at least in sections, in particular completely.
  • the flat band is preferably a mesh band, in particular a wire mesh band.
  • the ribbon can have an oval or rectangular cross-section.
  • a dimensional ratio between a long side and a short side of a cross section of the flat strip is preferably at least 1.5, in particular at least 2, in particular at least 3, and/or a maximum of 10, in particular a maximum of 7, in particular a maximum of 5, in particular a maximum of 3.
  • the induction coil 16 can be formed by a single coil conductor 37 with a constant cross-section.
  • the cross section of the coil conductor 37 can vary.
  • the cross-sectional shapes of the coil conductor 37 differ in the area of the two sub-winding groups 33, 34.
  • the dimension of the cross-section of the coil conductor 37 along the coil axis 30 is smaller than in the area of the second sub-winding group 34.
  • the extension of the coil conductor 37 in the direction of the coil axis 30 in the area of the second partial winding group 34 by at least 20%, in particular by 40%, greater than in the area of the first partial winding group 33.
  • the minimum radius of curvature of the coil conductor 37 is preferably at most 20 mm, in particular at most 10 mm, and/or at least 1 mm, in particular at least 2 mm, in particular at least 5 mm.
  • the functioning of the hob system 1 with the device 2 for extracting cooking vapors and the induction hob 3, in particular the induction heating unit 17 with the induction coil 16, is as follows:
  • the hob system 1 is deactivated.
  • the cookware 4, 5 is arranged on the induction hob 3.
  • the pot 4 is arranged on a single one of the hotplates 14 .
  • the roaster 5 overlaps two of the hotplates 14 in a plan view.
  • the user can activate the hob system 1 by means of the user interface 8 .
  • the extraction capacity of the vapor extraction device 2 can be adjusted.
  • the heating power of each induction heating unit 17 can be adjusted individually.
  • the cooking utensil sensor 19 recognizes the arrangement of the cooking utensil 4, 5 on the induction hob 3. In particular, it is recognized that the roaster 5 overlaps two of the hotplates 14.
  • the two induction heating units 17, whose associated hotplates 14 are overlapped by the roaster 5, are coupled to one another by means of the control device.
  • the coupling has the effect that the heating power output via both induction heating units 17 is identical. The user can thus set the heating output particularly easily and intuitively.
  • the temperature of the hotplates 14, in particular of the cookware 4, 5, is detected by means of the temperature sensor 20.
  • the induction heating unit 17 can be coupled in such a way that the temperatures recorded at the two hotplates 14 are matched to one another, in particular regulated to the same temperature value.
  • the induction heating units 17 are supplied with electrical power, in particular with alternating voltage, via the connection means 25 .
  • the current-carrying induction coil 16 generates a magnetic field.
  • the magnetic field extends into the area of the hotplates 14, in particular the cooking utensil 4, 5.
  • the magnetic field in particular the changing magnetic field, generates induction currents in the cooking utensil 4, 5, in particular in a base of the cooking utensil 4, 5.
  • the cooking utensil 4, 5 has a ferromagnetic material.
  • the induction currents lead to the cooking utensil 4, 5 heating up, in particular in accordance with the mode of operation of a resistance heater.
  • the induction heating unit 17 ensures that the cookware 4, 5 is heated particularly evenly. This is made possible in particular by the fact that the winding spacing d is at a maximum in the area between two adjacent maxima r max of the radial extent r. As a result, a particularly uniform winding density, in particular in the radial direction r, can be achieved.
  • the winding density is understood as meaning the ratio of the number of coil windings 28 of the winding group 32 and the width b of the winding group 32 .
  • the star-shaped arrangement of the ferrites 22 ensures that the heat output is evened out evenly over the hotplate 14.
  • thermoelectric windings 28 An excessive increase in the heat output emitted in the center area of the sides of the polygonally shaped coil windings 28, so-called hotspots, is avoided.
  • the heat output is emitted particularly evenly along the coil turns 28, in particular the first partial turn group 33. This advantageously ensures that the polygonal shaped hotplate 14 can be heated particularly evenly.
  • cooking utensils 4, 5 with a polygonal, in particular rectangular, in particular square, installation surface can be heated particularly evenly.
  • the induction hob 3 has seven induction heating units 17 for heating rectangular hotplates 14 in each case.
  • the induction coils 16 differ from the induction coils 16 of the embodiment described above in that their smallest convex envelope 35 of the winding group 32 is rectangular, apart from corner regions 36 .
  • the aspect ratio of the rectangular, smallest convex envelope 35 is 2:1.
  • the coil windings 28 follow this shape accordingly.
  • the structure of the induction heating units 17 corresponds to that of the induction heating units 17 described above.
  • the other components of the hob system 1 correspond to those of the hob system 1 described above.
  • the functioning of the hob system 1 essentially corresponds to the functioning of the hob system 1 described above.
  • two or three of the hotplates 14 arranged to the left or right of the user interface 8 can be coupled to one another.
  • the coupling takes place automatically, in particular, using a signal from the cooking utensil sensor 19. Alternatively or additionally, the coupling can take place manually, using a user input.
  • the induction heating units enable particularly uniform heating of the cookware 4, 5, the cooking result is improved and the induction hob 3 is particularly energy-efficient and user-friendly in operation.
  • a particularly uniform delivery of heating power can be achieved in particular with non-circular hotplates 14 .
  • heating power can be emitted particularly evenly via a plurality of induction heating units 17 coupled to one another.
  • the induction hob 3, in particular the hob system 1, can be used particularly flexibly and is energy-efficient and user-friendly in operation.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • General Induction Heating (AREA)
EP23153498.3A 2022-01-31 2023-01-26 Bobine d'induction pour chauffer un vaisselle, table de cuisson à induction et système de table de cuisson Pending EP4221462A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102022200973.8A DE102022200973A1 (de) 2022-01-31 2022-01-31 Induktionsspule zum Erhitzen von Gargeschirr, Induktionskochfeld und Kochfeldsystem

Publications (1)

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EP4221462A1 true EP4221462A1 (fr) 2023-08-02

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EP23153498.3A Pending EP4221462A1 (fr) 2022-01-31 2023-01-26 Bobine d'induction pour chauffer un vaisselle, table de cuisson à induction et système de table de cuisson

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Country Link
EP (1) EP4221462A1 (fr)
CN (1) CN116528416A (fr)
DE (1) DE102022200973A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0294006A1 (fr) * 1987-06-04 1988-12-07 Philips Patentverwaltung GmbH Hotte d'évacuation de fumées, en particulier pour la cuisine
DE102006038371A1 (de) * 2006-08-11 2008-02-14 E.G.O. Elektro-Gerätebau GmbH Induktionsheizeinrichtung für eine Induktionskochstelle und Induktionskochstelle
CN206472324U (zh) * 2016-12-26 2017-09-05 佛山市顺德区美的电热电器制造有限公司 线圈盘和电磁烹饪器具
EP3383138A1 (fr) 2017-03-30 2018-10-03 BSH Hausgeräte GmbH Dispositif d'appareil de cuisson
EP3383139A1 (fr) 2017-03-30 2018-10-03 BSH Hausgeräte GmbH Dispositif d'appareil de cuisson
CN209419905U (zh) * 2018-11-21 2019-09-20 佛山市顺德区美的电热电器制造有限公司 线圈盘座、线圈盘以及电磁烹饪器具
WO2021043626A1 (fr) * 2019-09-06 2021-03-11 BSH Hausgeräte GmbH Système d'appareil de cuisson

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0294006A1 (fr) * 1987-06-04 1988-12-07 Philips Patentverwaltung GmbH Hotte d'évacuation de fumées, en particulier pour la cuisine
DE102006038371A1 (de) * 2006-08-11 2008-02-14 E.G.O. Elektro-Gerätebau GmbH Induktionsheizeinrichtung für eine Induktionskochstelle und Induktionskochstelle
CN206472324U (zh) * 2016-12-26 2017-09-05 佛山市顺德区美的电热电器制造有限公司 线圈盘和电磁烹饪器具
EP3383138A1 (fr) 2017-03-30 2018-10-03 BSH Hausgeräte GmbH Dispositif d'appareil de cuisson
EP3383139A1 (fr) 2017-03-30 2018-10-03 BSH Hausgeräte GmbH Dispositif d'appareil de cuisson
CN209419905U (zh) * 2018-11-21 2019-09-20 佛山市顺德区美的电热电器制造有限公司 线圈盘座、线圈盘以及电磁烹饪器具
WO2021043626A1 (fr) * 2019-09-06 2021-03-11 BSH Hausgeräte GmbH Système d'appareil de cuisson

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CN116528416A (zh) 2023-08-01

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