EP2943044B1 - Heater for a cooking appliance and cooking appliance, in particular a hotplate - Google Patents

Heater for a cooking appliance and cooking appliance, in particular a hotplate Download PDF

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Publication number
EP2943044B1
EP2943044B1 EP15164255.0A EP15164255A EP2943044B1 EP 2943044 B1 EP2943044 B1 EP 2943044B1 EP 15164255 A EP15164255 A EP 15164255A EP 2943044 B1 EP2943044 B1 EP 2943044B1
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EP
European Patent Office
Prior art keywords
heat conductor
heater
conductor section
unit area
heating
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Application number
EP15164255.0A
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German (de)
French (fr)
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EP2943044A1 (en
Inventor
Andreas Hann
Leonhard Ott
Konrad Weinbrenner
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BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Publication of EP2943044A1 publication Critical patent/EP2943044A1/en
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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
    • H05B3/00—Ohmic-resistance heating
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H05B3/74—Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
    • H05B3/748—Resistive heating elements, i.e. heating elements exposed to the air, e.g. coil wire heater
    • 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
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0227—Applications
    • H05B1/0252—Domestic applications
    • H05B1/0258—For cooking
    • H05B1/0261—For cooking of food
    • H05B1/0266—Cooktops
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/002—Heaters using a particular layout for the resistive material or resistive elements
    • H05B2203/003—Heaters using a particular layout for the resistive material or resistive elements using serpentine layout
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/037—Heaters with zones of different power density
    • 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
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/07—Heating plates with temperature control means

Definitions

  • the invention relates to a heating element for a cooking appliance, comprising a band-shaped heating conductor, which has an electrical connection at a first end and a second electrical connection at a second end. Furthermore, the invention relates to a cooking appliance, in particular a hob, with at least one such radiator.
  • the DE 698 03 586 T2 describes a thick film electric heater.
  • a radiant heater has two heating coils, wherein a heating coil largely covers, with the exception of the outermost peripheral region, the cooking zone area and is designed in the form of semicircular heating areas with mutually concentric winding layers.
  • This heating coil is surrounded by a circular additional single-stranded heating coil, which is located directly on the periphery of the hob.
  • the two separate heating coils are each designed as separate heat conductors, their respective two ends being formed with electrical connection points.
  • the conceptual design to improve the cooking time or to improve the Ankochvorgangs is relatively expensive, and it will require several different separate heating conductors.
  • a heating element according to the invention for a cooking appliance comprises a strip-shaped heating conductor which has an electrical connection at a first end and a second electrical connection at a second end.
  • Such a configuration thus virtually provides a single heating conductor, which is designed as a strip or strand, which along its length comprises at least two different heating conductor sections which have different electrical heating powers per unit area of the same size.
  • an individual section design which in the single heating conductor itself makes it possible to provide different heating outputs per unit area, is integrated into a single heating conductor which has only two ends in its linear or single-lane configuration.
  • a radiator is created, which is formed on the one hand reduced component, on the other hand, a more flexible and variable possibility of different heating power provision allows.
  • an improvement of the Ankochvorgangs is also associated.
  • the unit area is preferably one square centimeter.
  • the first heating conductor section has a meander-shaped turn having ring-like winding sections.
  • These annular winding sections preferably have a circumferential length greater than 270 °, preferably greater than 300 °.
  • These ring-like winding sections thus also represent horseshoe-shaped winding sections.
  • winding sections preferably run concentrically around a radiator axis.
  • the second Schuleiterabites has a meandering turn.
  • the above-mentioned for the first Schuleiterabites advantageous embodiments with respect to the shape and / or orientation are to be regarded as advantageous embodiments, and thus then here also the advantages mentioned above go along.
  • the first heating conductor section is arranged radially further out than the second heating conductor section, in particular when the heating conductor sections are designed as ring-like windings.
  • the first heating power per unit area is higher than the second heating power per corresponding unit area.
  • a greater heating power per unit area is virtually provided at the outer regions than in the inner region. This is particularly advantageous for a very fast and targeted warming up. Since usually a bottom of a cookware usually has a concave shape and the bearing surface concentrates on the outer surface, such a design also results in better heat transfer from the radiator to the bottom of the cookware. This heat transfer by heat radiation and heat conduction is particularly favored by this advantageous embodiment of the invention in terms of improved heat transfer.
  • the heating conductor has a third heat conductor section, which has a first and second different third heating power per unit area.
  • the third heating conductor section has a meandering turn and, viewed in the radial direction, is arranged at least in regions between the first and the second heating conductor section.
  • the first Schuleiterabites viewed in the radial direction of the windings of the heating element is at least partially arranged as the radially outermost Edelleiterabrough and the inside of the third Schuleiterabites is arranged. Again, looking inward in the radial direction, the first heating conductor section is again arranged, and then, in turn, the second heating conductor section is arranged inwards. The winding arrangement of the heating conductor sections is thus arranged so that this interleaving results in the radial direction.
  • This particular specification of the arrangement of Bankleiterabitese viewed in the radial direction allows a very specific distribution of heating power particularly efficient introduction of heating power per unit area in a bottom of a cookware, even if this cookware has a relatively large floor area.
  • the third heating power is greater than the first and the second heating power.
  • the above-mentioned advantages in terms of a back reflection of a portion of the radiation from the bottom of the cookware to the hob plate and radiator allows, which then increases the temperature in the radially inner region disproportionately to the outer heated surface.
  • the heating conductor sections are formed as separate bands, which at connection points to a single strand as a heating conductor are connected so that the strand is designed in one lane or in one line.
  • they can first be produced as separate bands, whereby a high individuality is achieved in this regard. This applies in particular to form-specific individuality and material-specific individuality.
  • the heating element is formed as a one-piece, connectionless strand and in the context is virtually not composed of separate pieces, but is manufactured as enteil.
  • the heating conductor sections are different in their heights and / or widths and / or material compositions and thus the different heating powers are formed or defined.
  • a wide variety of shapes and specifications relating to height differences and / or width differences can be formed.
  • symmetrical or asymmetrical height changes can be formed relative to a longitudinal axis of the band-shaped heating conductor.
  • shaping of a heating conductor section from this longitudinal axis in the vertical direction, viewed upwards forms a different shape than viewed in a downward direction in the vertical direction relative to this longitudinal axis.
  • a wide variety of heating conductor sections can be configured in a variety of configurations, so that individual account can also be taken with regard to their respective lengths and / or space requirements.
  • the radiator has a temperature limiter unit, which is connected in particular in series with the heating conductor.
  • the temperature limiting unit has a sensing element and thus in particular a temperature sensing element and has a mechanically translated switching contact, which is connected in series with the heating conductor.
  • This tempering limiter unit is preferably arranged between the heating conductor and the hob plate already mentioned above. As soon as a predetermined or set limit temperature value is reached as the threshold value, the heating power supply is switched off or at least reduced by this temperature limiter unit.
  • the invention relates to a cooking appliance, in particular a hob, with at least one radiator according to the invention or an advantageous embodiment thereof.
  • a cooking appliance 1 is shown, which is a hob in the embodiment.
  • the cooking appliance 1 comprises a hob plate 2, which may be formed of glass or glass ceramic.
  • On an upper side 3 of the hob plate 2 are in the embodiment in terms of number, position and shape only to be understood by way of example cooking zones 4, 5, 6 and 7 formed. These can be seen on the top 3, marked by appropriate marks these cooking zones 4 to 7.
  • the cooking appliance 1 further comprises at least one radiator 8, 9, 10 and 11 arranged below the hob plate 2. These radiators 8 to 11 are arranged positionally below the hob plate 2 in such a way that the surface areas of the identified cooking zones 4 to 7 are heated.
  • the radiators 8 to 11 are designed as radiant heaters and are operated by a control and / or regulating unit, not shown.
  • the cooking appliance 1 also includes an operating device 12, which is also to be understood as an example only with regard to their positional arrangement and design.
  • the operating device 12 comprises by way of example at least one operating element and a display unit, wherein the operating element can be a manually operated and relative to the hob plate 2 movable operating element or can be a touch-sensitive control element.
  • FIG. 2 an embodiment of a radiator is shown in a plan view, wherein the radiator 8 is shown here by way of example.
  • This radiator 8 comprises a cup-shaped base body 13, which circumferentially has an insulation ring 14.
  • This insulating ring 14 is arranged on a pot bottom 15.
  • the heating element 8 comprises a band-shaped heating conductor 16.
  • This band-shaped heating conductor is formed as a single strand or as a single band and comprises only two ends, a first end 16a and a second end 16b. In particular, these ends 16a and 16b also each have an electrical connection 17a and 17b.
  • This band-shaped heating conductor 16 is, as in Fig. 2 can be seen in the plan view, multiple wound, here meander-shaped turns are designed, which are arranged circumferentially around a center A of the radiator 8 ring-like. They are laid horseshoe-like. It is provided in the embodiment shown that this single heating element 16 has a first heating conductor section 18 and a second heating conductor section 19.
  • the first Thompsonleiterabites 18 opens with its first end, which is the end 16a of the entire heat conductor 16 in the embodiment, to the outside, and opens with a second end opposite this end 16a to the connection point 20.
  • the second Schuleiterabites 19 is formed in that it opens at a first end to the connection point 20 and to the outside with a second end, which in the exemplary embodiment represents the second end 16b of the entire heating conductor 16.
  • the first Schumacherabites 18 a plurality of these ring-like windings, viewed in the radial direction represent the more outer turns. In contrast, therefore, are also more numerous turns of the second Schuleiterabitess 19 viewed in the radial direction further inside.
  • the radiator 8 further comprises a temperature limiter unit 21, which has a temperature sensor or a sensor element 22 and a mechanically translated switching contact 23. This switching contact 23 is connected in series with the heating conductor 16.
  • the heating conductor sections 18 and 19 have different electrical heating powers per respective same unit area, wherein the first Heating power per unit area of the first Schuleiterabitess 18 is greater than the second heating power per unit area of the second Schuleiterabitess 19th
  • a further embodiment of a radiator 8 is shown in a simplified plan view.
  • the heating conductor 16 has a third heating conductor section 24 in addition to the first heating conductor section 18 and the second heating conductor section 19.
  • This third heating conductor section 24 has a third heating power per unit area, which is different from the first heating power per unit area and the second heating capacity per unit area. In particular, this third heating power per unit area is greater than the first heating power per unit area and the second heating capacity per unit area.
  • a connection point 20 is then formed between the first heat conductor section 18 and the second heat conductor section 19.
  • a further connection point 25 is formed between the second heat conductor section 19 and the third heat conductor section 24.
  • one of the only two ends 16a and 16b also represents the end of the third heat conductor section 24.
  • the first end 16a of only two ends of the entire heating conductor 16 is again formed by one end of the first heating conductor section 18.
  • the first heating conductor section 18 which thus also initially starts circumferentially around the center A with a radially outermost turn.
  • the first heating conductor section 18 Following inward in the radial direction then preferably includes a plurality of winding sections of the third heating conductor section 24.
  • a further turn section of the first heating conductor section 18 is then arranged, wherein in turn, following this, in the radial direction following inwards, a plurality of turn sections of the second heating conductor section 19 follow. These then also close off the entire turn sections towards the center A.
  • the entire single-stranded or single-band heating conductor 16 is composed of a plurality of sections arranged in series one behind the other composed, which form through the Schuleiterabête 18 and 19 and additionally 24. It is thus here a one-piece heating element 16 is formed, which have only two ends 16a and 16b in its overall design.
  • FIG. 4 is a further embodiment of a radiator 8 shown in a plan view.
  • the three Schuleiterabête 18, 19 and 24 are not provided as separate bands, which are connected via connecting points 20 and 25 to a one-piece strand, but this heating element 16 is manufactured and provided by default as a one-piece component.
  • the different heating power per unit area of Edelleiterabête 18 and 19 and in the embodiment according to Fig. 3 and Fig. 4 can be due to different heights (in the direction perpendicular to the plane of the figure in Fig. 2 to Fig. 4 ) and / or different widths and / or different material compositions.
  • FIG Fig. 4 With respect to the radial arrangement of the winding sections of the meandering turns of the heating conductor sections 18, 19 and 24 in FIG Fig. 4 is on the arrangement, as in Fig. 3 referred to. In principle, however, other radial arrangements of the winding sections of the individual heating conductor sections 18, 19 and 24 may be provided.
  • Fig. 5 is an example of an embodiment of a heat conductor 16 shown in a side view. It can be seen that the heating conductor section 24 forms a greater height, which is measured perpendicular to a longitudinal axis B of the heating conductor 16. The longitudinal axis B is measured between the ends 16a and 16b, and the height is measured perpendicular thereto, so that they are in the representations in Fig. 2 to Fig. 4 perpendicular to Figure axis measured.
  • the third Thompsonabêt 24 viewed from the longitudinal axis B upwards and thus the pot bottom 15 facing away from a trapezoidal elevation 24a.
  • a plurality of tongues 24b are formed, of which only a few are provided with the corresponding reference numerals for clarity.
  • the first heat conductor section 18 has a lower height than the third heat conductor section 24. He has no such trapezoidal elevation 24a in the embodiment. Only at its lower edge and thus to the pot bottom 15 in turn corresponding tabs or tongues 18a are formed.
  • the second heat conductor section 19 is formed in the embodiment with respect to its basic geometric shape design corresponding to the first heat conductor section 18. However, here the height of a median strip 19b is smaller compared to a median strip 18b. Otherwise, here also downwards and thus in the direction of the pot bottom 15 tabs or tongues 19a are formed.
  • Fig. 6 is another embodiment of a heat conductor 16 is formed, in which case symmetrical shapes are designed to the longitudinal axis B.
  • the third heat conductor section 24 has trapezoidal elevations 24a and 24c, which are designed to be equally large, both upwardly and downwardly.
  • the first heat conductor section 18 only the center strip 18b is present and the tabs 18a are not formed.
  • the height of this central strip 18b is smaller than the entire height of the trapezoidal elevations 24a and 24c.
  • only the center strip 19b is formed in the second heat conductor section 19 and no corresponding tongues 19a are present.
  • the height of this median strip 19b is smaller than the height of the median strip 18b. Due to the respective specific shapes of the heating conductor sections 18, 19 and 24, different electrical resistances are also formed, which then also result in the different heating powers per unit area.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Food Science & Technology (AREA)
  • Resistance Heating (AREA)
  • Cookers (AREA)

Description

Die Erfindung betrifft einen Heizkörper für ein Gargerät, mit einem bandförmigen Heizleiter, welcher an einem ersten Ende einen elektrischen Anschluss und an einem zweiten Ende einen zweiten elektrischen Anschluss aufweist. Des Weiteren betrifft die Erfindung ein Gargerät, insbesondere ein Kochfeld, mit zumindest einem derartigen Heizkörper.The invention relates to a heating element for a cooking appliance, comprising a band-shaped heating conductor, which has an electrical connection at a first end and a second electrical connection at a second end. Furthermore, the invention relates to a cooking appliance, in particular a hob, with at least one such radiator.

Die DE 698 03 586 T2 beschreibt einen Dickfilm-Elektroheizer.The DE 698 03 586 T2 describes a thick film electric heater.

Aus der DE 32 06 024 A1 ist eine Elektrokochplatte bekannt. Um dort einen Ankochvorgang zu intensivieren, wird mit höherer Heizleistung gefahren. Diese erhöhte Heizleistung soll dadurch erreicht werden, dass ein Strahlungsheizkörper zwei Heizwicklungen aufweist, wobei eine Heizwicklung weitgehend, mit Ausnahme des äußersten Peripheriebereichs, den Kochstellenbereich überzieht und dazu in Form von halbkreisförmigen Heizbereichen mit jeweils zueinander konzentrischen Wicklungslagen ausgebildet ist. Diese Heizwicklung ist umgeben von einer kreisringförmigen zusätzlichen einstrangigen Heizwicklung, die sich unmittelbar am Peripheriebereich der Kochstelle befindet. Die beiden separaten Heizwicklungen sind jeweils als eigene separate Heizleiter ausgebildet, wobei ihre jeweiligen beiden Enden mit elektrischen Anschlussstellen ausgebildet sind. Bei diesem bekannten Heizkörper ist die konzeptionelle Ausgestaltung zur Verbesserung der Ankochzeit beziehungsweise zur Verbesserung des Ankochvorgangs relativ aufwendig, und es werden dazu mehrere verschiedene separate Heizleiter benötigt.From the DE 32 06 024 A1 is an electric hotplate known. In order to intensify a warm-up process there is a higher heat output. This increased heating power is to be achieved in that a radiant heater has two heating coils, wherein a heating coil largely covers, with the exception of the outermost peripheral region, the cooking zone area and is designed in the form of semicircular heating areas with mutually concentric winding layers. This heating coil is surrounded by a circular additional single-stranded heating coil, which is located directly on the periphery of the hob. The two separate heating coils are each designed as separate heat conductors, their respective two ends being formed with electrical connection points. In this known radiator, the conceptual design to improve the cooking time or to improve the Ankochvorgangs is relatively expensive, and it will require several different separate heating conductors.

Es ist Aufgabe der vorliegenden Erfindung, einen Heizkörper sowie ein Gargerät mit einem derartigen Heizkörper zu schaffen, welcher beziehungsweise welches bezüglich des konzeptionellen Aufbaus zur Erreichung unterschiedlicher Heizleistungen verbessert ist.It is an object of the present invention to provide a radiator and a cooking appliance with such a radiator, which or which is improved with respect to the conceptual design to achieve different heating performance.

Diese Aufgabe wird durch einen Heizkörper und ein Gargerät gemäß den unabhängigen Ansprüchen gelöst.This object is achieved by a radiator and a cooking appliance according to the independent claims.

Ein erfindungsgemäßer Heizkörper für ein Gargerät umfasst einen bandförmigen Heizleiter, welcher an einem ersten Ende einen elektrischen Anschluss und an einem zweiten Ende einen zweiten elektrischen Anschluss aufweist. Ein wesentlicher Gedanke der Erfindung: ist darin zu sehen, dass der Heizleiter entlang seiner bandförmigen Ausgestaltung einen ersten Heizleiterabschnitt aufweist, der eine erste Heizleistung pro Flächeneinheit und somit eine Heizleistungsdichte aufweist, und entlang seiner bandförmigen Ausgestaltung zumindest einen an den ersten Heizleiterabschnitt anschließenden und damit verbundenen zweiten Heizleiterabschnitt aufweist, der eine zur ersten Heizleistung pro Flächeneinheit unterschiedliche zweite Heizleistung pro gleich großer Flächeneinheit aufweist. Durch eine derartige Ausgestaltung wird somit quasi ein einziger Heizleiter, der als Band oder Strang ausgebildet ist, bereitgestellt, welcher entlang seiner Länge zumindest zwei verschiedene Heizleiterabschnitte umfasst, die unterschiedliche elektrische Heizleistungen pro gleich großer Flächeneinheit aufweisen. Durch diese Ausgestaltung ist somit quasi in einem einzigen Heizleiter, der in seiner linienförmigen bzw einspurigen Ausgestaltung nur zwei Enden aufweist, integriert eine individuelle Abschnittgestaltung ausgebildet, die in dem einzigen Heizleiter selbst ermöglicht, uriterschiedliche Heizleistungen pro Flächeneinheit bereitzustellen. Durch eine derartige Ausgestaltung wird ein Heizkörper geschaffen, welcher einerseits bauteilreduziert ausgebildet ist, andererseits eine flexiblere und variablere Möglichkeit der unterschiedlichen Heizleistungsbereitstellung ermöglicht. Durch eine derartige Ausgestaltung ist auch eine Verbesserung des Ankochvorgangs einhergehend.A heating element according to the invention for a cooking appliance comprises a strip-shaped heating conductor which has an electrical connection at a first end and a second electrical connection at a second end. An essential idea of the invention is to be seen in that the heating conductor along its band-shaped configuration has a first heat conductor portion having a first heating power per unit area and thus a Heizleistungsdichte, and along its band-shaped configuration at least one adjoining the first Heizleiterabschnitt and thus connected second Heizleiterabschnitt having a second heating power per unit area different second heating power per unit area equal to the first heating power. Such a configuration thus virtually provides a single heating conductor, which is designed as a strip or strand, which along its length comprises at least two different heating conductor sections which have different electrical heating powers per unit area of the same size. As a result of this embodiment, an individual section design, which in the single heating conductor itself makes it possible to provide different heating outputs per unit area, is integrated into a single heating conductor which has only two ends in its linear or single-lane configuration. By such a configuration, a radiator is created, which is formed on the one hand reduced component, on the other hand, a more flexible and variable possibility of different heating power provision allows. By such a configuration, an improvement of the Ankochvorgangs is also associated.

Die Flächeneinheit beträgt vorzugsweise einen Quadratzentimeter.The unit area is preferably one square centimeter.

Es ist vorgesehen, dass der erste Heizleiterabschnitt eine mäanderförmige Windung aufweist, die ringartige Wicklungsabschnitte aufweist. Diese ringartigen Wicklungsabschnitte weisen vorzugsweise eine Umlauflänge größer 270°, vorzugsweise größer 300°, auf. Diese ringartigen Windungsabschnitte stellen somit auch hufeisenförmige Windungsabschnitte dar.It is provided that the first heating conductor section has a meander-shaped turn having ring-like winding sections. These annular winding sections preferably have a circumferential length greater than 270 °, preferably greater than 300 °. These ring-like winding sections thus also represent horseshoe-shaped winding sections.

Diese Windungsabschnitte laufen vorzugsweise konzentrisch um eine Heizkörperachse um.These winding sections preferably run concentrically around a radiator axis.

Durch eine derartige Ausgestaltung wird einerseits eine möglichst gleichmäßige und somit homogene Verteilung der Windungsabschnitte erreicht. Andererseits wird somit auch eine möglichst dicht gepackte Anordnung dieser Windungsabschnitte ermöglicht. Gerade bei dieser Ausgestaltung mit einem einzigen bandförmigen Heizleiter, der unterschiedliche Heizleistungen pro Flächeneinheit bei unterschiedlichen Heizleiterabschnitten aufweist, sind dann besonders die oben genannten Vorteile gegeben.Such a configuration on the one hand achieves the most uniform and thus homogeneous distribution of the turn sections. On the other hand, a densely packed arrangement of these turns sections is thus possible. Especially in this embodiment with a single band-shaped heating conductor having different heating powers per unit area at different Heizleiterabschnitten, then the above-mentioned advantages are given in particular.

Es ist vorgesehen, dass der zweite Heizleiterabschnitt eine mäanderförmige Windung aufweist. Auch hier sind die bereits oben zum ersten Heizleiterabschnitt genannten vorteilhaften Ausführungen bezüglich der Formgebung und/oder Orientierung als vorteilhafte Ausführungen anzusehen, wobei somit dann auch hier die dazu oben genannten Vorteile einhergehen.It is provided that the second Heizleiterabschnitt has a meandering turn. Again, the above-mentioned for the first Heizleiterabschnitt advantageous embodiments with respect to the shape and / or orientation are to be regarded as advantageous embodiments, and thus then here also the advantages mentioned above go along.

Es ist vorgesehen, dass der erste Heizleiterabschnitt radial weiter außen angeordnet ist als der zweite Heizleiterabschnitt, insbesondere dann, wenn die Heizleiterabschnitte als ringartige Windungen ausgebildet sind. Durch diese örtliche Spezifikation der jeweiligen Heizleiterabschnitte kann eine örtlich sehr definierte Heizleistungsbereitstellung ermöglicht werden und an ein Kochgeschirr beziehungsweise ein Zubereitungsgefäß übertragen werden.It is provided that the first heating conductor section is arranged radially further out than the second heating conductor section, in particular when the heating conductor sections are designed as ring-like windings. By this local specification of the respective Heizleiterabschnitte a locally very defined heating power provision can be made possible and transferred to a cookware or a preparation vessel.

Hierbei ist die erste Heizleistung pro Flächeneinheit höher als die zweite Heizleistung pro entsprechender Flächeneinheit. Dadurch wird quasi an den äußeren Bereichen eine größere Heizleistung pro Flächeneinheit bereitgestellt, als in dem inneren Bereich. Dies ist besonders vorteilhaft für einen sehr schnellen und gezielten Ankochvorgang. Da üblicherweise ein Boden eines Kochgeschirrs in der Regel eine konkave Ausprägung aufweist und sich die Auflagefläche auf die äußere Fläche konzentriert, erfolgt durch eine derartige Ausgestaltung auch eine bessere Wärmeübertragung von dem Heizkörper zu dem Boden des Kochgeschirrs. Diese Wärmeübertragung durch Wärmestrahlung und Wärmeleitung ist durch dieses vorteilhafte Ausführungsbeispiel der Erfindung im Hinblick auf eine verbesserte Wärmeübertragung besonders begünstigt.Here, the first heating power per unit area is higher than the second heating power per corresponding unit area. As a result, a greater heating power per unit area is virtually provided at the outer regions than in the inner region. This is particularly advantageous for a very fast and targeted warming up. Since usually a bottom of a cookware usually has a concave shape and the bearing surface concentrates on the outer surface, such a design also results in better heat transfer from the radiator to the bottom of the cookware. This heat transfer by heat radiation and heat conduction is particularly favored by this advantageous embodiment of the invention in terms of improved heat transfer.

Bedingt durch den kleinen Luftspalt in der Mitte des Heizsystems bestehend aus dem Heizkörper, einer Kochplatte und dem Kochgeschirr reduziert sich dort der Wärmetransport überwiegend auf die Wärmestrahlung. Dieser Luftspalt entsteht somit insbesondere zwischen dem oben genannten gewölbten Boden des Kochgeschirrs und einer Platte, insbesondere einer Kochfeldplatte, auf welcher das Kochgeschirr aufgestellt ist und unter welcher sich der Heizkörper befindet.Due to the small air gap in the middle of the heating system consisting of the radiator, a hotplate and the cookware, the heat transfer there is reduced mainly to the heat radiation. This air gap thus arises in particular between the above-mentioned curved bottom of the cookware and a plate, in particular a hob plate on which the cookware is placed and under which the radiator is located.

Ein Teil dieser genannten Strahlung wird dann vom Boden des Kochgeschirrs zu dieser Platte und zum Heizkörper zurück reflektiert, wodurch sich die Temperatur im Inneren überproportional zur äußeren beheizten Fläche erhöht.A portion of this radiation is then reflected back from the bottom of the cookware to this plate and to the radiator, whereby the temperature inside increases disproportionately to the outer heated surface.

Bei einer vorteilhaften Ausführung ist vorgesehen, dass der Heizleiter einen dritten Heizleiterabschnitt aufweist, der eine zur ersten und zur zweiten unterschiedliche dritte Heizleistung pro Flächeneinheit aufweist. Durch eine derartige Spezifikation kann die Flexibilität und Individualität bezüglich einer verbesserten Heizleistungsverteilung pro Flächeneinheit noch feinjustierter und detaillierter erfolgen. Die oben genannten Vorteile werden dadurch nochmals in verbesserter Weise erreicht.In an advantageous embodiment, it is provided that the heating conductor has a third heat conductor section, which has a first and second different third heating power per unit area. By virtue of such a specification, the flexibility and individuality with respect to an improved heating power distribution per unit area can be made even more finely adjusted and more detailed. The above advantages are thereby achieved again in an improved manner.

Vorzugsweise ist vorgesehen, dass der dritte Heizleiterabschnitt eine mäanderförmige Windung aufweist und in radialer Richtung betrachtet zumindest bereichsweise zwischen dem ersten und dem zweiten Heizleiterabschnitt angeordnet ist. Auch hier gelten bezüglich der vorzugsweise ringartigen Ausgestaltung der Windung mit ihren Windungsabschnitten die bereits oben zu dem ersten und dem zweiten Heizleiterabschnitt genannten vorteilhaften Ausführungen, was dann auch hier zu den bereits dort genannten Vorteilen führt.It is preferably provided that the third heating conductor section has a meandering turn and, viewed in the radial direction, is arranged at least in regions between the first and the second heating conductor section. Again, with respect to the preferably ring-like configuration of the winding with its Windungsabschnitten apply the above already mentioned to the first and second Heizleiterabschnitt advantageous embodiments, which then leads here to the advantages already mentioned there.

Vorzugsweise ist vorgesehen, dass der erste Heizleiterabschnitt in radialer Richtung der Windungen des Heizleiters betrachtet zumindest abschnittsweise als radial äußerster Heizleiterabschnitt angeordnet ist und nach innen folgend der dritte Heizleiterabschnitt angeordnet ist. Wiederum in radialer Richtung betrachtet nach innen folgend ist dann wieder der erste Heizleiterabschnitt angeordnet, und dann wiederum nach innen folgend ist der zweite Heizleiterabschnitt angeordnet. Die Windungsanordnung der Heizleiterabschnitte ist also so angeordnet, dass sich in radialer Richtung diese Verschachtelung ergibt. Diese besondere Spezifikation der Anordnung der Heizleiterabschnitte in radialer Richtung betrachtet ermöglicht eine sehr spezifische Verteilung der Heizleistung eine besonders effiziente Einbringung der Heizleistung pro Flächeneinheit in einen Boden eines Kochgeschirrs, auch dann, wenn dieses Kochgeschirr eine relativ große Bodenfläche aufweist.It is preferably provided that the first Heizleiterabschnitt viewed in the radial direction of the windings of the heating element is at least partially arranged as the radially outermost Heizleiterabschnitt and the inside of the third Heizleiterabschnitt is arranged. Again, looking inward in the radial direction, the first heating conductor section is again arranged, and then, in turn, the second heating conductor section is arranged inwards. The winding arrangement of the heating conductor sections is thus arranged so that this interleaving results in the radial direction. This particular specification of the arrangement of Heizleiterabschnitte viewed in the radial direction allows a very specific distribution of heating power particularly efficient introduction of heating power per unit area in a bottom of a cookware, even if this cookware has a relatively large floor area.

Vorzugsweise ist vorgesehen, dass die dritte Heizleistung größer als die erste und die zweite Heizleistung ist. In radialer Richtung der Anordnung und Ausgestaltung des Heizleiters betrachtet wird somit zunächst von außen gesehen eine quasi mittlere Heizleistung pro Flächeneinheit bereitgestellt und bei einem dann nach innen Wandern in radialer Richtung die Heizleistung auf den höchsten Heizleistungswert erhöht, um dann wiederum radial weiter nach innen gehend auf den mittleren Heizleistungswert reduziert zu werden, um dann wiederum radial weiter nach innen wandern auf den kleinsten Heizleistungswert abzufallen.It is preferably provided that the third heating power is greater than the first and the second heating power. Considered in the radial direction of the arrangement and design of the heating is thus initially seen from the outside a quasi-average heating power per unit area and then increases inward in the radial direction, the heating power to the highest heating power value, in turn then radially further inwardly going on to be reduced, the average Heizleistungswert, in turn, then radially further inward migrate to the lowest Heizleistungswert fall.

Auch durch eine derartige spezifische Ausgestaltung wird die bereits oben genannte Vorteilhaftigkeit bezüglich einer Rückreflexion eines Teils der Strahlung vom Boden des Kochgeschirrs zur Kochfeldplatte und zum Heizkörper ermöglicht, wodurch sich dann auch hier die Temperatur im radial inneren Bereich überproportional, zur äußeren beheizten Fläche erhöht.Also by such a specific embodiment, the above-mentioned advantages in terms of a back reflection of a portion of the radiation from the bottom of the cookware to the hob plate and radiator allows, which then increases the temperature in the radially inner region disproportionately to the outer heated surface.

Weiterhin kann durch diese spezifische Ausführung und im Übrigen auch durch die Erfindung generell eine lokale Überhitzung der Kochfeldplatte im radial inneren Bereich der Kochzone, welche durch die Ausmaße des Heizkörpers definiert ist, vermieden werden.Furthermore, by this specific embodiment and incidentally also by the invention generally a local overheating of the cooktop panel in the radially inner region of the cooking zone, which is defined by the dimensions of the radiator can be avoided.

Durch dieses spezifische Layout des Heizleiters gemäß der Erfindung und dieses Vermeiden der Überhitzung der Kochfeldplatte im radial inneren Bereich wird auch bis zum Ansprechen eines Temperaturbegrenzers einer Schutzschaltung mehr Energie in das gesamte Kochsystem, welches den Heizkörper und das Kochgeschirr, insbesondere zusätzlich auch die Kochfeldplatte, umfasst, übertragen. Dadurch wird die Ankochzeit zusätzlich reduziert.By this specific layout of the heat conductor according to the invention and this avoiding overheating of the cooktop panel in the radially inner region is also up to the response of a temperature limiter of a protective circuit more energy in the entire cooking system, which includes the radiator and the cookware, in particular also the cooktop panel , transfer. This additionally reduces the cooking time.

Vorzugsweise ist vorgesehen, dass die Heizleiterabschnitte als separate Bänder ausgebildet sind, die an Verbindungsstellen zu einem einzigen Strang als Heizleiter verbunden sind, so dass der Strang einspurig bzw. einlinig gestaltet ist. Dadurch können sie zunächst als eigene Bänder hergestellt werden, wodurch diesbezüglich eine hohe Individualität erreicht ist. Dies betrifft insbesondere formspezifische Individualität und materiellspezifische Individualität.It is preferably provided that the heating conductor sections are formed as separate bands, which at connection points to a single strand as a heating conductor are connected so that the strand is designed in one lane or in one line. As a result, they can first be produced as separate bands, whereby a high individuality is achieved in this regard. This applies in particular to form-specific individuality and material-specific individuality.

Indem dann diese separaten Bänder zu einem einzigen Strang beziehungsweise einem einzigen zusammenhängenden Band verbunden werden, entsteht dann wiederum ein einteiliger Heizleiter, so dass der Strang einspurig bzw. einlinig gestaltet ist.By then these separate bands are connected to form a single strand or a single continuous band, then in turn results in a one-piece heating element, so that the strand is designed in one lane or in one line.

In einer vorteilhaften Ausführung ist vorgesehen, dass der Heizleiter als einstückiger, verbindungsstellenloser Strang ausgebildet ist und in dem Zusammenhang quasi nicht aus separaten Stücken zusammengesetzt ist, sondern als enteil gefertigt ist. Durch eine derartige Ausgestaltung wird der Montageaufwand zum Verbinden von einzelnen Bändern vermieden.In an advantageous embodiment, it is provided that the heating element is formed as a one-piece, connectionless strand and in the context is virtually not composed of separate pieces, but is manufactured as enteil. By such a configuration of the assembly effort for connecting individual bands is avoided.

Vorzugsweise ist vorgesehen, dass die Heizleiterabschnitte in ihren Höhen und/oder Breiten und/oder materiellen Zusammensetzungen unterschiedlich sind und dadurch die unterschiedlichen Heizleistungen ausgebildet beziehungsweise definiert sind. In dem Zusammenhang können unterschiedlichste Formgebungen und Spezifikationen betreffend die Höhenunterschiede und/oder Breitenunterschiede ausgebildet werden. Bezüglich der Höhe können sich bezogen auf eine Längsachse des bandförmigen Heizleiters symmetrische oder auch unsymmetrische Höhenveränderungen ausbilden. Es kann auch vorgesehen sein, dass eine Formgebung eines Heizleiterabschnitts von dieser Längsachse in vertikaler Richtung nach oben betrachtet eine unterschiedliche Formgebung gestaltet, als in vertikaler Richtung zu dieser Längsachse nach unten hin betrachtet. Dadurch können in vielfältiger Ausgestaltung unterschiedlichste Heizleiterabschnitte ausgestaltet werden, sodass auch bezüglich deren jeweiligen Längen und/oder des Platzbedarfs individuell Rechnung getragen werden kann.Preferably, it is provided that the heating conductor sections are different in their heights and / or widths and / or material compositions and thus the different heating powers are formed or defined. In this connection, a wide variety of shapes and specifications relating to height differences and / or width differences can be formed. With regard to the height, symmetrical or asymmetrical height changes can be formed relative to a longitudinal axis of the band-shaped heating conductor. It can also be provided that shaping of a heating conductor section from this longitudinal axis in the vertical direction, viewed upwards, forms a different shape than viewed in a downward direction in the vertical direction relative to this longitudinal axis. As a result, a wide variety of heating conductor sections can be configured in a variety of configurations, so that individual account can also be taken with regard to their respective lengths and / or space requirements.

Vorzugsweise ist vorgesehen, dass der Heizkörper eine Temperaturbegrenzereinheit aufweist, die insbesondere in Reihe zu dem Heizleiter geschaltet ist. Insbesondere ist vorgesehen, dass die Temperaturbegrenzereinheit ein Fühlerelement und somit insbesondere ein Temperaturerfassungselement aufweist und einen mechanisch übersetzten Schaltkontakt aufweist, welcher mit dem Heizleiter in Reihe geschaltet ist.It is preferably provided that the radiator has a temperature limiter unit, which is connected in particular in series with the heating conductor. In particular, it is provided that the temperature limiting unit has a sensing element and thus in particular a temperature sensing element and has a mechanically translated switching contact, which is connected in series with the heating conductor.

Diese Temperatürbegrenzereinheit ist vorzugsweise zwischen dem Heizleiter und der bereits oben angesprochenen Kochfeldplatte angeordnet. Sobald dann ein vorgegebener beziehungsweise eingestellter Grenztemperaturwert als Schwellwert erreicht wird, wird durch diese Temperaturbegrenzereinheit die Heizleistungszufuhr abgeschaltet oder zumindest reduziert.This tempering limiter unit is preferably arranged between the heating conductor and the hob plate already mentioned above. As soon as a predetermined or set limit temperature value is reached as the threshold value, the heating power supply is switched off or at least reduced by this temperature limiter unit.

Des Weiteren betrifft die Erfindung ein Gargerät, insbesondere ein Kochfeld, mit zumindest einem erfindungsgemäßen Heizkörper öder einer vorteilhaften Ausgestaltung davon.Furthermore, the invention relates to a cooking appliance, in particular a hob, with at least one radiator according to the invention or an advantageous embodiment thereof.

Weitere Merkmale der Erfindung ergeben sich aus den Ansprüchen, den Figuren und der Figurenbeschreibung.Further features of the invention will become apparent from the claims, the figures and the description of the figures.

Ausführungsbeispiele der Erfindung werden nachfolgend anhand schematischer Zeichnungen näher erläutert. Es zeigen:

Fig. 1
eine schematische perspektivische Darstellung eines Ausführungsbeispiels eines erfindungsgemäßen Gargeräts;
Fig. 2
eine Draufsicht auf ein erstes Ausführungsbeispiel eines erfindungsgemäßen Heizkörpers;
Fig. 3
eine Draufsicht auf ein weiteres Ausführungsbeispiel eines erfindungsgemäßen Heizkörpers;
Fig. 4
eine Draufsicht auf ein weiteres Ausführungsbeispiel eines erfindungsgemäßen Heizkörpers;
Fig.5
eine Seitenansicht auf ein Ausführungsbeispiel eines Heizleiters eines erfindungsgemäßen Heizkörpers; und
Fig. 6
eine Seitenansicht auf ein weiteres Ausführungsbeispiel eines Heizleiters eines erfindungsgemäßen Heizkörpers.
Embodiments of the invention are explained in more detail below with reference to schematic drawings. Show it:
Fig. 1
a schematic perspective view of an embodiment of a cooking appliance according to the invention;
Fig. 2
a plan view of a first embodiment of a radiator according to the invention;
Fig. 3
a plan view of another embodiment of a radiator according to the invention;
Fig. 4
a plan view of another embodiment of a radiator according to the invention;
Figure 5
a side view of an embodiment of a heat conductor of a radiator according to the invention; and
Fig. 6
a side view of a further embodiment of a heat conductor of a radiator according to the invention.

In den Figuren werden gleiche oder funktionsgleiche Elemente mit den gleichen Bezugszeichen versehen.In the figures, identical or functionally identical elements are provided with the same reference numerals.

In Fig. 1 ist ein Gargerät 1 gezeigt, welches im Ausführungsbeispiel ein Kochfeld ist. Das Gargerät 1 umfasst eine Kochfeldplatte 2, welche aus Glas oder Glaskeramik ausgebildet sein kann. Auf einer Oberseite 3 der Kochfeldplatte 2 sind im Ausführungsbeispiel im Hinblick auf Anzahl, Position und Formgebung lediglich beispielhaft zu verstehen Kochzonen 4, 5, 6 und 7 ausgebildet. Dazu sind auf der Oberseite 3 erkennbar, durch entsprechende Markierungen diese Kochzonen 4 bis 7 kenntlich gemacht. Das Gargerät 1 umfasst darüber hinaus unter der Kochfeldplatte 2 angeordnet jeweils zumindest einen Heizkörper 8, 9, 10 und 11. Diese Heizkörper 8 bis 11 sind positionell unter der Kochfeldplatte 2 so angeordnet, dass die Flächenbereiche der kenntlich gemachten Kochzonen 4 bis 7 beheizt werden.In Fig. 1 a cooking appliance 1 is shown, which is a hob in the embodiment. The cooking appliance 1 comprises a hob plate 2, which may be formed of glass or glass ceramic. On an upper side 3 of the hob plate 2 are in the embodiment in terms of number, position and shape only to be understood by way of example cooking zones 4, 5, 6 and 7 formed. These can be seen on the top 3, marked by appropriate marks these cooking zones 4 to 7. The cooking appliance 1 further comprises at least one radiator 8, 9, 10 and 11 arranged below the hob plate 2. These radiators 8 to 11 are arranged positionally below the hob plate 2 in such a way that the surface areas of the identified cooking zones 4 to 7 are heated.

Die Heizkörper 8 bis 11 sind als Strahlungsheizkörper ausgebildet und werden über eine nicht gezeigte Steuer- und/oder Regeleinheit betrieben.The radiators 8 to 11 are designed as radiant heaters and are operated by a control and / or regulating unit, not shown.

Das Gargerät 1 umfasst darüber hinaus eine Bedienvorrichtung 12, die im Hinblick auf ihre positionelle Anordnung und Ausgestaltung ebenfalls lediglich als beispielhaft zu verstehen ist. Die Bedienvorrichtung 12 umfasst beispielhaft zumindest ein Bedienelement und eine Anzeigeeinheit, wobei das Bedienelement ein manuell zu betätigendes und relativ zur Kochfeldplatte 2 bewegbares Bedienelement sein kann oder ein berührsensitives Bedienelement sein kann.The cooking appliance 1 also includes an operating device 12, which is also to be understood as an example only with regard to their positional arrangement and design. The operating device 12 comprises by way of example at least one operating element and a display unit, wherein the operating element can be a manually operated and relative to the hob plate 2 movable operating element or can be a touch-sensitive control element.

In Fig. 2 ist in einer Draufsicht ein Ausführungsbeispiel eines Heizkörpers gezeigt, wobei hier beispielhaft der Heizkörper 8 dargestellt ist. Dieser Heizkörper 8 umfasst einen topfförmigen Grundkörper 13, der umlaufend einen Isolationsring 14 aufweist. Dieser Isolationsring 14 ist auf einem Topfboden 15 angeordnet.In Fig. 2 an embodiment of a radiator is shown in a plan view, wherein the radiator 8 is shown here by way of example. This radiator 8 comprises a cup-shaped base body 13, which circumferentially has an insulation ring 14. This insulating ring 14 is arranged on a pot bottom 15.

Darüber hinaus umfasst der Heizkörper 8 einen bandförmigen Heizleiter 16. Dieser bandförmige Heizleiter ist als ein einziger Strang beziehungsweise als ein einziges Band ausgebildet und umfasst nur zwei Enden, ein erstes Ende 16a und ein zweites Ende 16b. Diese Enden 16a und 16b weisen insbesondere auch jeweils einen elektrischen Anschluss 17a und 17b auf. Dieser bandförmige Heizleiter 16 ist, wie in Fig. 2 in der Draufsicht zu erkennen ist, mehrfach gewunden ausgebildet, wobei hier mäanderförmige Windungen ausgestaltet sind, die ringartig umlaufend um einen Mittelpunkt A des Heizkörpers 8 angeordnet sind. Sie sind hufeisenartig verlegt. Es ist in der gezeigten Ausführung vorgesehen, dass dieser einzige Heizleiter 16 einen ersten Heizleiterabschnitt 18 und einen zweiten Heizleiterabschnitt 19 aufweist. Diese beiden Heizleiterabschnitte 18 und 19 sind an einer Verbindungsstelle 20 miteinander verbunden. Somit mündet der erste Heizleiterabschnitt 18 mit seinem ersten Ende, welches im Ausführungsbeispiel auch das Ende 16a des gesamten Heizleiters 16 ist, nach außen, und mündet mit einem diesem Ende 16a gegenüberliegenden zweiten Ende an die Verbindungsstelle 20. Entsprechend ist der zweite Heizleiterabschnitt 19 so ausgebildet, dass er mit einem ersten Ende an die Verbindungsstelle 20 mündet und mit einem zweiten Ende, welches im Ausführungsbeispiel das zweite Ende 16b des gesamten Heizleiters 16 darstellt, nach außen.In addition, the heating element 8 comprises a band-shaped heating conductor 16. This band-shaped heating conductor is formed as a single strand or as a single band and comprises only two ends, a first end 16a and a second end 16b. In particular, these ends 16a and 16b also each have an electrical connection 17a and 17b. This band-shaped heating conductor 16 is, as in Fig. 2 can be seen in the plan view, multiple wound, here meander-shaped turns are designed, which are arranged circumferentially around a center A of the radiator 8 ring-like. They are laid horseshoe-like. It is provided in the embodiment shown that this single heating element 16 has a first heating conductor section 18 and a second heating conductor section 19. These two heating conductor sections 18 and 19 are connected to one another at a connection point 20. Thus, the first Heizleiterabschnitt 18 opens with its first end, which is the end 16a of the entire heat conductor 16 in the embodiment, to the outside, and opens with a second end opposite this end 16a to the connection point 20. Accordingly, the second Heizleiterabschnitt 19 is formed in that it opens at a first end to the connection point 20 and to the outside with a second end, which in the exemplary embodiment represents the second end 16b of the entire heating conductor 16.

Wie in der Darstellung in Fig. 2 auch zu erkennen ist, weist der erste Heizleiterabschnitt 18 eine Mehrzahl dieser ringartigen Windungen auf, die in radialer Richtung betrachtet die weiter außen liegenden Windungen darstellen. Demgegenüber liegen somit die ebenfalls mehrzahligen Windungen des zweiten Heizleiterabschnitts 19 in radialer Richtung betrachtet weiter innen.As in the illustration in Fig. 2 can also be seen, the first Heizleiterabschnitt 18 a plurality of these ring-like windings, viewed in the radial direction represent the more outer turns. In contrast, therefore, are also more numerous turns of the second Heizleiterabschnitts 19 viewed in the radial direction further inside.

Der Heizkörper 8 umfasst darüber hinaus eine Temperaturbegrenzereinheit 21, die einen Temperaturfühler beziehungsweise ein Fühlerelement 22 und einen mechanisch übersetzten Schaltkontakt 23 aufweist. Dieser Schaltkontakt 23 ist in Reihe mit dem Heizleiter 16 geschaltet.The radiator 8 further comprises a temperature limiter unit 21, which has a temperature sensor or a sensor element 22 and a mechanically translated switching contact 23. This switching contact 23 is connected in series with the heating conductor 16.

Im Ausführungsbeispiel weisen die Heizleiterabschnitte 18 und 19 unterschiedliche elektrische Heizleistungen pro jeweiliger gleicher Flächeneinheit auf, wobei die erste Heizleistung pro Flächeneinheit des ersten Heizleiterabschnitts 18 größer ist als die zweite Heizleistung pro Flächeneinheit des zweiten Heizleiterabschnitts 19.In the exemplary embodiment, the heating conductor sections 18 and 19 have different electrical heating powers per respective same unit area, wherein the first Heating power per unit area of the first Heizleiterabschnitts 18 is greater than the second heating power per unit area of the second Heizleiterabschnitts 19th

In Fig. 3 ist in einer vereinfachten Draufsicht ein weiteres Ausführungsbeispiel eines Heizkörpers 8 gezeigt.In Fig. 3 a further embodiment of a radiator 8 is shown in a simplified plan view.

Im Unterschied zur Ausgestaltung gemäß Fig. 2 ist hier vorgesehen, dass der Heizleiter 16 neben dem ersten Heizleiterabschnitt 18 und dem zweiten Heizleiterabschnitt 19 einen dritten Heizleiterabschnitt 24 aufweist. Dieser dritte Heizleiterabschnitt 24 weist eine dritte Heizleistung pro Flächeneinheit auf, die unterschiedlich zur ersten Heizleistung pro Flächeneinheit und zur zweiten Heizleistung pro Flächeneinheit ist. Insbesondere ist diese dritte Heizleistung pro Flächeneinheit größer als die erste Heizleistung pro Flächeneinheit und die zweite Heizleistung pro Flächeneinheit. Auch hier ist dann eine Verbindungsstelle 20 zwischen dem ersten Heizleiterabschnitt 18 und dem zweiten Heizleiterabschnitt 19 ausgebildet. Zusätzlich ist eine weitere Verbindungsstelle 25 zwischen dem zweiten Heizleiterabschnitt 19 und dem dritten Heizleiterabschnitt 24 ausgebildet. Bei dieser Ausgestaltung gemäß Fig. 3 ist dann vorgesehen, dass eines der nur zwei Enden 16a und 16b, nämlich das zweite Ende 16b, auch das Ende des dritten Heizleiterabschnitts 24 darstellt. Das erste Ende 16a der nur zwei Enden des gesamten Heizleiters 16 wird wiederum durch ein Ende des ersten Heizleiterabschnitts 18 gebildet.In contrast to the embodiment according to Fig. 2 It is provided here that the heating conductor 16 has a third heating conductor section 24 in addition to the first heating conductor section 18 and the second heating conductor section 19. This third heating conductor section 24 has a third heating power per unit area, which is different from the first heating power per unit area and the second heating capacity per unit area. In particular, this third heating power per unit area is greater than the first heating power per unit area and the second heating capacity per unit area. Here too, a connection point 20 is then formed between the first heat conductor section 18 and the second heat conductor section 19. In addition, a further connection point 25 is formed between the second heat conductor section 19 and the third heat conductor section 24. In this embodiment according to Fig. 3 it is then provided that one of the only two ends 16a and 16b, namely the second end 16b, also represents the end of the third heat conductor section 24. The first end 16a of only two ends of the entire heating conductor 16 is again formed by one end of the first heating conductor section 18.

Bezüglich der Windungsausgestaltung des Heizleiters 16 in Fig. 3 beginnt dieser ausgehend von dem ersten Ende 16a mit dem ersten Heizleiterabschnitt 18, der somit dann umlaufend um den Mittelpunkt A auch zunächst mit einer radial äußersten Windung beginnt. In radialer Richtung nach innen folgend schließt dann vorzugsweise eine Mehrzahl von Windungsabschnitten des dritten Heizleiterabschnitts 24 an. Wiederum radial nach innen folgend ist dann ein weiterer Windungsabschnitt des ersten Heizleiterabschnitts 18 angeordnet, wobei dann wiederum ausgehend davon in radialer Richtung nach innen folgend mehrere Windungsabschnitte des zweiten Heizleiterabschnitts 19 folgen. Diese schließen dann auch die gesamten Windungsabschnitte zum Mittelpunkt A hin ab.With regard to the winding configuration of the heating conductor 16 in FIG Fig. 3 starting from the first end 16a, this starts with the first heating conductor section 18, which thus also initially starts circumferentially around the center A with a radially outermost turn. Following inward in the radial direction then preferably includes a plurality of winding sections of the third heating conductor section 24. Again following radially inward, a further turn section of the first heating conductor section 18 is then arranged, wherein in turn, following this, in the radial direction following inwards, a plurality of turn sections of the second heating conductor section 19 follow. These then also close off the entire turn sections towards the center A.

Bei den Ausführungen in Fig. 2 und Fig. 3 ist der gesamte einstrangige beziehungsweise einbandige Heizleiter 16 aus mehreren in Reihe hintereinander angeordneten Teilstücken zusammengesetzt, die sich durch die Heizleiterabschnitte 18 und 19 sowie zusätzlich 24 bilden. Es wird hier somit ein einteiliger Heizleiter 16 gebildet, der in seiner Gesamtausgestaltung nur zwei Enden 16a und 16b aufweisen.In the versions in Fig. 2 and Fig. 3 the entire single-stranded or single-band heating conductor 16 is composed of a plurality of sections arranged in series one behind the other composed, which form through the Heizleiterabschnitte 18 and 19 and additionally 24. It is thus here a one-piece heating element 16 is formed, which have only two ends 16a and 16b in its overall design.

In der Darstellung gemäß Fig. 4 ist ein weiteres Ausführungsbeispiel eines Heizkörpers 8 in einer Draufsicht dargestellt. Im Unterschied zur Ausgestaltung gemäß Fig. 3 sind hier die drei Heizleiterabschnitte 18, 19 und 24 nicht als separate Bänder bereitgestellt, die über Verbindungsstellen 20 und 25 zu einem einteiligen Strang verbunden sind, sondern dieser Heizleiter 16 ist von Haus aus als einstückiges Bauteil gefertigt und bereitgestellt. Verbindungsstellen 20 und 25, an denen die separaten Bänder somit nach deren eigener jeweiliger Herstellung und Fertigung dann miteinander in einem expliziten Verbindungsschritt miteinander verbunden werden, ist hier nicht ausgebildet.In the illustration according to Fig. 4 is a further embodiment of a radiator 8 shown in a plan view. In contrast to the embodiment according to Fig. 3 Here, the three Heizleiterabschnitte 18, 19 and 24 are not provided as separate bands, which are connected via connecting points 20 and 25 to a one-piece strand, but this heating element 16 is manufactured and provided by default as a one-piece component. Connecting points 20 and 25, at which the separate bands are thus connected to one another according to their own respective production and production in an explicit connection step, is not formed here.

Die unterschiedliche Heizleistung pro Flächeneinheit der Heizleiterabschnitte 18 und 19 sowie im Ausführungsbeispiel gemäß Fig. 3 und Fig. 4 kann durch unterschiedliche Höhen (in Richtung senkrecht zur Figurenebene in Fig. 2 bis Fig. 4) und/oder unterschiedliche Breiten und/oder unterschiedliche materielle Zusammensetzungen ausgebildet sein.The different heating power per unit area of Heizleiterabschnitte 18 and 19 and in the embodiment according to Fig. 3 and Fig. 4 can be due to different heights (in the direction perpendicular to the plane of the figure in Fig. 2 to Fig. 4 ) and / or different widths and / or different material compositions.

Bezüglich der radialen Anordnung der Windungsabschnitte der mäanderförmigen Windungen der Heizleiterabschnitte 18, 19 und 24 in Fig. 4 wird auf die Anordnung, wie sie in Fig. 3 erläutert wurde, verwiesen. Grundsätzlich können jedoch auch andere radiale Anordnungen der Windungsabschnitte der einzelnen Heizleiterabschnitte 18, 19 und 24 vorgesehen sein.With respect to the radial arrangement of the winding sections of the meandering turns of the heating conductor sections 18, 19 and 24 in FIG Fig. 4 is on the arrangement, as in Fig. 3 referred to. In principle, however, other radial arrangements of the winding sections of the individual heating conductor sections 18, 19 and 24 may be provided.

In den Fig. 2 bis 4 sind die jeweiligen Heizleiterabschnitte durch die unterschiedlich gestrichelten Linien symbolisiert, so dass insbesondere auch der jeweilige bevorzugte Verlauf und die Anordnung zueinander verdeutlicht sind.In the Fig. 2 to 4 the respective Heizleiterabschnitte are symbolized by the different dashed lines, so that in particular the respective preferred course and the arrangement are illustrated to each other.

In Fig. 5 ist in einer Seitenansicht beispielhaft eine Ausführung eines Heizleiters 16 gezeigt. Es ist zu erkennen, dass der Heizleiterabschnitt 24 eine größere Höhe, die sich senkrecht zu einer Längsachse B des Heizleiters 16 bemisst, ausbildet. Die Längsachse B bemisst sich dabei zwischen den Enden 16a und 16b, und die Höhe bemisst sich senkrecht dazu, sodass sie sich in den Darstellungen in Fig. 2 bis Fig. 4 senkrecht zur Figurenachse bemisst. Wie in der Darstellung gemäß Fig. 5 zu erkennen ist, weist der dritte Heizleiterabschnitt 24 von der Längsachse B nach oben betrachtet und somit dem Topfboden 15 abgewandt eine trapezförmige Erhebung 24a auf. Auf der gegenüberliegenden Seite und somit dem Topfboden 15 zugewandt ist eine Mehrzahl von Zungen 24b ausgebildet, von denen der Übersichtlichkeit dienend nur einige mit dem entsprechenden Bezugszeichen versehen sind.In Fig. 5 is an example of an embodiment of a heat conductor 16 shown in a side view. It can be seen that the heating conductor section 24 forms a greater height, which is measured perpendicular to a longitudinal axis B of the heating conductor 16. The longitudinal axis B is measured between the ends 16a and 16b, and the height is measured perpendicular thereto, so that they are in the representations in Fig. 2 to Fig. 4 perpendicular to Figure axis measured. As in the illustration according to Fig. 5 can be seen, the third Heizleiterabschnitt 24 viewed from the longitudinal axis B upwards and thus the pot bottom 15 facing away from a trapezoidal elevation 24a. On the opposite side and thus facing the bottom of the pot 15, a plurality of tongues 24b are formed, of which only a few are provided with the corresponding reference numerals for clarity.

Im Unterschied dazu weist der erste Heizleiterabschnitt 18 eine geringere Höhe als der dritte Heizleiterabschnitt 24 auf. Er weist im Ausführungsbeispiel keine derartige trapezförmige Erhebung 24a auf. Lediglich an seinem unteren Rand und somit zum Topfboden 15 hin sind wiederum entsprechende Lappen beziehungsweise Zungen 18a ausgebildet.In contrast, the first heat conductor section 18 has a lower height than the third heat conductor section 24. He has no such trapezoidal elevation 24a in the embodiment. Only at its lower edge and thus to the pot bottom 15 in turn corresponding tabs or tongues 18a are formed.

Der zweite Heizleiterabschnitt 19 ist im Ausführungsbeispiel bezüglich seiner grundsätzlichen geometrischen Formgestaltung entsprechend dem ersten Heizleiterabschnitt 18 ausgebildet. Allerdings ist hier die Höhe eines Mittelstreifens 19b im Vergleich zu einem Mittelstreifen 18b kleiner. Ansonsten sind auch hier dann nach unten hin und somit in Richtung des Topfbodens 15 Laschen beziehungsweise Zungen 19a angeformt.The second heat conductor section 19 is formed in the embodiment with respect to its basic geometric shape design corresponding to the first heat conductor section 18. However, here the height of a median strip 19b is smaller compared to a median strip 18b. Otherwise, here also downwards and thus in the direction of the pot bottom 15 tabs or tongues 19a are formed.

In Fig. 6 ist ein weiteres Ausführungsbeispiel eines Heizleiters 16 ausgebildet, wobei hier zur Längsachse B symmetrische Formgebungen gestaltet sind. Dies bedeutet, dass der dritte Heizleiterabschnitt 24 sowohl nach oben als auch nach unten trapezförmige Erhebungen 24a und 24c aufweist, die gleich groß gestaltet sind. Demgegenüber ist auch dann bei dem ersten Heizleiterabschnitt 18 nur der Mittelstreifen 18b vorhanden und die Laschen 18a nicht ausgebildet. Die Höhe dieses Mittelstreifens 18b ist kleiner als die gesamte Höhe der trapezförmigen Erhebungen 24a und 24c. Demgegenüber ist dann auch wiederum bei dem zweiten Heizleiterabschnitt 19 nur der Mittelstreifen 19b ausgebildet und keine entsprechenden Zungen 19a vorhanden. Die Höhe dieses Mittelstreifens 19b ist kleiner als die Höhe des Mittelstreifens 18b. Durch die jeweiligen spezifischen Formgebungen der Heizleiterabschnitte 18, 19 und 24 sind auch unterschiedliche elektrische Widerstände gebildet, wodurch sich dann auch die unterschiedlichen Heizleistungen pro Flächeneinheit ergeben.In Fig. 6 is another embodiment of a heat conductor 16 is formed, in which case symmetrical shapes are designed to the longitudinal axis B. This means that the third heat conductor section 24 has trapezoidal elevations 24a and 24c, which are designed to be equally large, both upwardly and downwardly. In contrast, even in the first heat conductor section 18, only the center strip 18b is present and the tabs 18a are not formed. The height of this central strip 18b is smaller than the entire height of the trapezoidal elevations 24a and 24c. On the other hand, in turn, only the center strip 19b is formed in the second heat conductor section 19 and no corresponding tongues 19a are present. The height of this median strip 19b is smaller than the height of the median strip 18b. Due to the respective specific shapes of the heating conductor sections 18, 19 and 24, different electrical resistances are also formed, which then also result in the different heating powers per unit area.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
GargerätCooking appliance
22
KochfeldplatteHotplate
33
Oberseitetop
4,5,6,74,5,6,7
Kochzonencooking zones
8, 9, 10, 118, 9, 10, 11
Heizkörperradiator
1212
Bedienvorrichtungoperating device
1313
Grundkörperbody
1414
Isolationsringinsulation ring
1515
Topfbodenpot base
1616
Heizleiterheating conductor
16a16a
erstes Endefirst end
16b16b
zweites Endesecond end
17a, 17b17a, 17b
elektrische Anschüsseelectrical connections
1818
erster Heizleiterabschnittfirst heating conductor section
18a18a
Zungentongues
18b18b
Mittelstreifencentral reservation
1919
zweiter Heizleiterabschnittsecond heating conductor section
19a19a
Zungentongues
19b19b
Mittelstreifencentral reservation
2020
Verbindungsstellejunction
2121
TemperaturbegrenzereinheitTemperature limiter unit
2222
Fühlerelementsensing element
2323
Schaltkontaktswitching contact
2424
dritter Heizleiterabschnittthird heating conductor section
24a24a
Erhebungsurvey
24b24b
Zungentongues
24c24c
Erhebungsurvey
2525
Verbindungsstellejunction
AA
MittelpunktFocus
BB
Längsachselongitudinal axis

Claims (11)

  1. Heater (8) for a cooking appliance (1), having a band-shaped heat conductor (16), which has a first end (16a) and a second end (16b), wherein the heat conductor (16) has a first heat conductor section (18), which has a first heating output per unit area, and at least one second heat conductor section (19) connecting to the first heat conductor section (18), which has a second heating output which differs from the first heating output per unit area, wherein the first heat conductor section (18) has a meander-shaped winding, the second heat conductor section (19) has a meander-shaped winding, the meander-shaped windings have annular winding sections and the first heat conductor section (18) is arranged radially further outwards than the second heat conductor section (19), characterised in that the heater (8) is embodied as a radiation heater, wherein the first heating output per unit area is higher than the second heating output per unit area.
  2. Heater (8) according to claim 1, characterised in that the heat conductor (16) has a third heat conductor section (24), which has a third heating output per unit area which differs from the first and the second.
  3. Heater (8) according to claim 2, characterised in that the third heat conductor section (24) has a meander-shaped winding and when viewed in the radial direction of the windings of the heat conductor (16) is arranged at least in areas between the first (18) and the second heat conductor section (19).
  4. Heater (8) according to claim 2 or 3, characterised in that when viewed in the radial direction of the windings of the heat conductor (16) the first heat conductor section (18) is arranged at least in sections as the radially outermost heat conductor section and the third heat conductor section (24) is arranged subsequently inwards and in turn the first heat conductor section (18) is again arranged subsequently inwards and the second heat conductor section (19) is again arranged subsequently inwards.
  5. Heater (8) according to one of claims 2 to 4, characterised in that the third heating output per unit area is greater than the first and the second heating output per unit area.
  6. Heater (8) according to one of the preceding claims, characterised in that the heat conductor sections (18, 19, 24) are separate bands which are connected at connecting points (20, 25) to a single strand as a heat conductor (16).
  7. Heater (8) according to one of the preceding claims 1 to 9, characterised in that the heat conductor (16) is embodied as a single-piece strand.
  8. Heater (8) according to one of the preceding claims, characterised in that the heat conductor sections (18, 19, 24) differ in terms of their heights and/or widths and/or material compositions measured at right angles to a longitudinal axis (B) of the heat conductor (16) and as a result the different heating outputs per unit area are defined.
  9. Heater (8) according to one of the preceding claims, characterised in that a temperature limiting unit (21) is embodied, which is connected in series with the heat conductor (16).
  10. Heater (8) according to claim 9, characterised in that the temperature limiting unit (21) has a sensor element (22) and a mechanically transmitted switching contact (23) which is connected in series with the heat conductor (16).
  11. Cooking appliance (1), in particular hotplate, having at least one heater (8) according to one of the preceding claims.
EP15164255.0A 2014-05-06 2015-04-20 Heater for a cooking appliance and cooking appliance, in particular a hotplate Active EP2943044B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014208408.3A DE102014208408A1 (en) 2014-05-06 2014-05-06 Radiator for a cooking appliance and cooking appliance, in particular hob

Publications (2)

Publication Number Publication Date
EP2943044A1 EP2943044A1 (en) 2015-11-11
EP2943044B1 true EP2943044B1 (en) 2017-08-09

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ID=53008295

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Application Number Title Priority Date Filing Date
EP15164255.0A Active EP2943044B1 (en) 2014-05-06 2015-04-20 Heater for a cooking appliance and cooking appliance, in particular a hotplate

Country Status (3)

Country Link
EP (1) EP2943044B1 (en)
DE (1) DE102014208408A1 (en)
ES (1) ES2644074T3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3068117B1 (en) * 2017-06-27 2019-11-01 Frima International Ag MODULAR SYSTEM COMPRISING AT LEAST TWO TYPES OF COOKING APPARATUS AND COOKING APPARATUS
CN109392203A (en) * 2018-08-01 2019-02-26 安吉热威电热科技有限公司 A kind of resistance wire structure and the electric radiation heater with the resistance wire
US20210388992A1 (en) * 2018-09-25 2021-12-16 Breville Pty Limited A cooking appliance

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3206024A1 (en) 1982-02-19 1983-09-08 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart ELECTRIC COOKING PLATE, PREFERABLY GLASS-CERAMIC COOKER
GB2322273B (en) * 1997-02-17 2001-05-30 Strix Ltd Electric heaters
IT1311785B1 (en) * 1999-04-23 2002-03-19 Irca Spa PROCEDURE FOR THE CREATION OF HEATING ELEMENTS FOR GLASS-CERAMIC COOKING HOBS AND HEATING ELEMENT OBTAINED WITH THE
DE10310255A1 (en) * 2003-03-05 2004-09-16 E.G.O. Elektro-Gerätebau GmbH Electric heating with a contact hot plate
DE102004024044A1 (en) * 2004-05-07 2005-11-24 E.G.O. Elektro-Gerätebau GmbH Electric heat conductor for a heating device like a radiating heater consists of ceramic material in the form of a tape with current flowing through it
TWI281833B (en) * 2004-10-28 2007-05-21 Kyocera Corp Heater, wafer heating apparatus and method for manufacturing heater

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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Publication number Publication date
ES2644074T3 (en) 2017-11-27
DE102014208408A1 (en) 2015-11-12
EP2943044A1 (en) 2015-11-11

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