EP0103741B1 - Heating element, especially radiant heating element for the heating of ceramic plates - Google Patents

Heating element, especially radiant heating element for the heating of ceramic plates Download PDF

Info

Publication number
EP0103741B1
EP0103741B1 EP83107991A EP83107991A EP0103741B1 EP 0103741 B1 EP0103741 B1 EP 0103741B1 EP 83107991 A EP83107991 A EP 83107991A EP 83107991 A EP83107991 A EP 83107991A EP 0103741 B1 EP0103741 B1 EP 0103741B1
Authority
EP
European Patent Office
Prior art keywords
heating
heating resistor
series
heating element
resistor
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.)
Expired
Application number
EP83107991A
Other languages
German (de)
French (fr)
Other versions
EP0103741A3 (en
EP0103741A2 (en
Inventor
Gerhard Goessler
Eugen Wilde
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.)
EGO Elektro Geratebau GmbH
Original Assignee
EGO Elektro Gerate Blanc und Fischer GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25804505&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0103741(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE19823234349 external-priority patent/DE3234349A1/en
Priority claimed from DE19833314501 external-priority patent/DE3314501A1/en
Application filed by EGO Elektro Gerate Blanc und Fischer GmbH filed Critical EGO Elektro Gerate Blanc und Fischer GmbH
Priority to AT83107991T priority Critical patent/ATE38757T1/en
Publication of EP0103741A2 publication Critical patent/EP0103741A2/en
Publication of EP0103741A3 publication Critical patent/EP0103741A3/en
Application granted granted Critical
Publication of EP0103741B1 publication Critical patent/EP0103741B1/en
Expired legal-status Critical Current

Links

Images

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
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0202—Switches
    • H05B1/0216—Switches actuated by the expansion of a solid element, e.g. wire or rod
    • 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
    • F24C15/10—Tops, e.g. hot plates; Rings
    • F24C15/102—Tops, e.g. hot plates; Rings electrically heated
    • F24C15/106—Tops, e.g. hot plates; Rings electrically heated electric circuits
    • 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
    • H05B3/746—Protection, e.g. overheat cutoff, hot plate indicator
    • 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
    • H05B2213/04—Heating plates with overheat protection means

Definitions

  • the invention relates to a radiant heating element for heating glass ceramic plates in cooking appliances, with at least two areas with clocking power-controlled electrical heating resistors and a temperature limiter with a temperature sensor extending over both areas.
  • the object of the invention is to provide a heating element which, despite increased performance and good manufacturability, permits uniform heat distribution when both heating zones are switched on.
  • the invention achieves this object in that a series heating resistor arranged in the outer region of the heating element can be connected in series to a central heating resistor and can be switched off in a switching state of the temperature limiter.
  • a high output with a high specific heating surface load can be installed in the central heating resistor in the central zone, while a uniform power distribution is achieved by the series heating resistor over the entire heating surface of the heating element.
  • the ballast resistor can be arranged in the outer region or the heating zone in addition to a further heating resistor which can be connected in parallel with the central heating resistor, for example.
  • the power distribution can be set as desired.
  • the specific heating surface load of the central zone can be reduced due to the series heating resistance.
  • This embodiment is also suitable for heating elements which deliberately have two differently sized or differently designed heating zones which are switched on differently depending on the size or shape of the pot.
  • the ballast heating resistor can be connected upstream to normal power in order to reduce an increased switch-on power provided in the central heating resistor. If the pre-heating resistor closely surrounds a central heating zone containing the other heating resistor, the result is a total cooking surface which is often not significantly larger than that occupied by the central heating resistor.
  • the total cooking surface switched on with a series heating resistor has a lower overall output than the central zone alone, especially when switched on.
  • the outer area can be integrated into an overall winding to the extent that it takes up the outer of the spirally laid turns of both heating zones.
  • DE-A-30 07 037 also shows, in the case of heating elements with two areas, in accordance with the heat effect on the temperature sensor of a temperature limiter which is limited to only a certain area in a heating zone, to equip it with switches of different response temperature in order to switch off at a comparable surface temperature of the glass ceramic plate to reach. It is then necessary to lay four supply lines between the control unit and the heating element and to design the switch for the second heating zone as a double switch. If, in a particularly preferred exemplary embodiment of the invention, a temperature limiter is provided with two contacts of different response temperature, of which the one with a low response temperature is designed as a changeover contact, this problem is solved.
  • the changeover switch switches the heating resistor, which can also be switched on individually, when the lower adjusted response temperature is reached from a current branch upstream of the switch to a current branch downstream of the switch, so that it is switched off on its own, but when both heaters are switched on zones is switched on again with its power possibly reduced by the series resistor.
  • This circuit only requires three hotplate feed lines and a simple switch for connecting the second heating zone.
  • FIG. 1 and 2 are schematic top views and circuit diagrams of a heating element and its control.
  • a radiant heating element 11 is shown for a glass ceramic hotplate of a cooker. It contains on an insulating support 12 heating resistors 13, 14, 15, which consist of wire coils, which are attached in the form of arcs, spirals or double spirals on the surface of the insulating support.
  • heating zones 16, 17, are arranged in two areas, hereinafter referred to as heating zones 16, 17, the central heating zone 16 containing the heating resistor 13 and being surrounded by an annular heating zone 17 with a substantially larger total area, in which a main heating resistor 14 in the form of an annular loop with four Coils running parallel to one another, but the heating resistor 15 is arranged in the form of a simple, curved loop between the two outer strands over a sector of, for example, 60 ° and supplements the main heating resistor 14 on the four strands there.
  • a rod-shaped temperature sensor 18 of a temperature limiter 19 protrudes diametrically over both heating zones 16, 17 and protects the glass ceramic plate from harmful overheating by switching off the heating resistors.
  • the temperature limiter contains two switching contacts 20, 21 which are adjusted to different response points and of which the contact 21 is a changeover contact.
  • a clocking power control device 22 is used to control the power. It contains a bimetal 23 which is heated by a control heating resistor 24 and which acts on a switch 25, the power which is thereby clocked in different relative operating times being adjustable via an adjusting knob 26.
  • the outer heating zone 17 can be activated by an additional switch 27.
  • the power supply to the heating element 11 takes place via the switch 25 and the contact 20 of the temperature limiter 19 adjusted to a higher temperature.
  • the heating resistors 14 and 13 are connected to this branch 28.
  • the other end of the middle heating resistor 13 runs to the other switching contact 21 of the temperature limiter and can be branched there to two connections which are connected on the one hand to the other network pole 29 and on the other hand to a feed line 30 to the series heating resistor 15.
  • the other ends of the heating resistors 14, 15 are put together at the switch 27.
  • the function of the heating element is as follows (Fig. 1): When the switch 27 is open, only the central heating zone 16 is operated, for example if only a small pot is to be heated. When the power control device is switched on via the setting knob 26, the switch 25 is closed and the middle heating zone is operated at its full power, for example approx Can be 50% of the total power of the heating element. This results in a relatively quick heating of the small cooking vessel.
  • the middle heating zone 16 heats only the middle part of the temperature sensor 18 to full temperature, so that the resulting expansion of the temperature sensor is less than when the temperature sensor is fully loaded. Since the changeover contact is adjusted to a lower response point, the heating resistor 13 nevertheless switches off at the correct limiting temperature. The switch contact 21 then switches to the contact 31.
  • the outer heating zone 17 is switched on via the additional switch 27, then with a previously cold heating element, i. H. not yet responding contact 21, the undiminished power of the heating resistor 13, for example 900 watts, and the power of the heating resistor 14 (e.g. 1400 watts) switched on, so that a high total power for boiling is switched on. Since the entire temperature sensor length is now heated, the contact 21 is switched over much earlier, i.e. at a temperature significantly below the limit temperature. By switching to contact 31, heating resistor 15 is now connected in series to heating resistor 13, so that the power of heating resistor 13 is considerably reduced (for example to 650 watts), while the outer heating zone has a relatively small amount of power due to the pre-heating resistor 15 will be added.
  • the specific heating surface loads can be adapted to the circumstances by appropriately dimensioning the heating resistors. In any case, it is possible to achieve a uniform specific heating surface load over the entire surface, or even to choose a lower one in the central area.
  • the contact 20 switches off the total power and switches it on again when the temperature drops.
  • the arrangement of the heating resistors can be different.
  • the arrangement of the switch-on heating resistor 15 which is limited to a ring segment, this could also be arranged, for example, as a winding that runs around the entire heating element.
  • the advantage remains that the ballast heating resistor not only reduces the performance of the other heating zone, but also that Switch-on heating zone 17 receives additional power from the ballast heating resistor.
  • the arrangement can also be useful with a configuration other than circularly concentric, for example with a rectangular heating element with a central round hotplate and additional heating zones attached on both sides, the elongated rectangular cooking surfaces being mostly used for heating and therefore a uniform power distribution is particularly important.
  • the temperature limiter described has the advantage that the switch options described are possible with only one additional switch 27 as a result of the changeover switch 21, since when the lower response temperature is reached, the changeover switch switches the heating resistor 13, which was previously only switched on, in parallel with the heating resistor 14, with the ballast heating resistor itself 15 is connected upstream.
  • FIG. 2 shows a heating element in which there are two heating zones 16a, 17a, but which are not as clearly separated from one another as in FIG. 1. They are not intended, as in FIG. 1, to heat pots of different sizes , but are assigned to a cooktop of a uniform size. Accordingly, the bowl-shaped insulating body 35, in which the heating resistors 13a, 15a are arranged, also has no internal subdivisions, but only an edge 36 surrounding the common cooking area formed from the two heating zones, which lies against the underside of the glass ceramic plate.
  • the arrangement of the heating resistors is such that the inner heating resistor 13a takes up most of the area, while the outer heating resistor 15a is practically limited to the outer winding .
  • both heating elements are continuous in the form of a double spiral, i. H. a spiral with two parallel turns in the reverse turns in the middle of the heating element.
  • the outer heating resistor extends between a connection 37 and a tap 38, which is formed by an inserted connecting pin between the heating resistors 13a, 15a, while the central main heating resistor 13a is connected between a connection 39 on the inside of the outer double turn and the tap 38 .
  • a temperature limiter 19a is provided, the rod temperature sensor 18a of which projects somewhat eccentrically over both heating zones 16a, 17a.
  • the temperature limiter 19a has only a simple switching contact, which is opened when the response temperature is reached.
  • the heating resistor 13a alone is switched on, which has a comparatively large output. It corresponds to a parboiling rate, i.e. a higher output than the heating element should have in the permanent state.
  • the wire from which the heating coil 13a is made can therefore be relatively thick and is therefore easy to lay and thermally and mechanically durable.
  • This power is clocked according to the response of the power control device 23, 24, 25 according to the set power value.
  • the switch 27 is opened, the previously short-circuited heating resistor 15a is connected in series in front of the heating resistor 13a, so that both heating resistors together now have a lower output than the heating resistor 13a alone. In this position, both heating zones 16a, 17a are switched on and there is a more evenly distributed, but lower power which is used for continued cooking.
  • the strong power concentration in the heating area is also less critical, since in this area the food is still cold and does not tend to boil or partially burn, while in the continued cooking area, if this becomes critical, the comparatively lower power is available.
  • the service life of the heating elements is also surprisingly good. Despite the heavy load on the heating resistor 13a during the boil-up phase, this does not reduce the service life, because this time is usually very short.
  • the switch 27 is preferably operated manually, but could also be operated thermally or by a timer.

Description

Die Erfindung betrifft ein Strahlungsheizelement, für die Beheizung von Glaskeramikplatten in Kochgeräten, mit wenigstens zwei Bereichen mit taktend leistungsgesteuerten elektrischen Heizwiderständen und einem Temperaturbegrenzer mit einem sich über beide Bereiche erstreckenden Temperaturfühler.The invention relates to a radiant heating element for heating glass ceramic plates in cooking appliances, with at least two areas with clocking power-controlled electrical heating resistors and a temperature limiter with a temperature sensor extending over both areas.

Aus der DE-A-30 07 037 ist ein Heizelement mit zwei konzentrischen Heizzonen bekanntgeworden. Es ist erwünscht, die Leistung der mittleren Heizzone kräftig zu erhöhen, um bei kleinen Kochgefässen eine kurze Ankochzeit zu erreichen. Eine Gesamtleistung über einer bestimmten Grenze, beispielsweise 2100 W, ist nicht möglich, wenn die Steuerung mit einem taktenden Leistungssteuergerät vorgenommen werden soll. Die hohen Ein- und Ausschaltströme und die notwendige Schaltfrequenz belasten das Stromnetz unzulässig. Erhöht man die Leistung der mittleren Heizzone auf Kosten der anderen, ergibt sich bei Zusammenschaltung eine ungünstige Wärmeverteilung. Ferner sind Heizwiderstände mit zu kleiner Leistung für höhere Spannungen, insbesondere 380V, schwer herzustellen, weil die Drähte zu dünn werden und sich schlecht auf dem Isolierkörper des Heizelementes befestigen lassen.From DE-A-30 07 037 a heating element with two concentric heating zones has become known. It is desirable to increase the output of the central heating zone vigorously in order to achieve a short heating-up time for small cooking vessels. A total power above a certain limit, for example 2100 W, is not possible if the control is to be carried out with a clocking power control device. The high switch-on and switch-off currents and the necessary switching frequency impose an unacceptable burden on the power grid. If you increase the output of the middle heating zone at the expense of the others, the result is an unfavorable heat distribution when interconnected. Furthermore, heating resistors with too little power for higher voltages, in particular 380V, are difficult to manufacture because the wires become too thin and are difficult to attach to the insulating element of the heating element.

Aus den DE-B-1 239 034 und 1 097 586 sind sog. Siebentakt-Schaltungen für Gusskochplatten bekanntgeworden, in deren Kochplattenkörper mehrere, meist drei, Heizwiderstände möglichst gleichmässig über die Heizfläche verteilt eingebettet sind und die durch einen Mehrtaktschalter in verschiedenen Kombinationen von Einzel-, Parallel- und Reihenschaltung geschaltet werden, um mehrere, meist sieben, aufeinanderfolgende Leistungsstufen (einschliesslich der Null-Stellung) zu erreichen. Dabei ist die Reihenschaltung jeweils als unterste Wärmestufe vorgesehen. Die Anordnung der Heizwiderstände in diesen Gusskochplatten ist so vorgesehen, dass möglichst alle drei Heizwiderstände alle Bereiche erreichen, indem die drei Heizwiderstände beispielsweise in Form einer dreigängigen parallelen Spirale angeordnet sind.From DE-B-1 239 034 and 1 097 586, so-called seven-cycle circuits for cast-iron hotplates have become known, in the hotplate body of which several, usually three, heating resistors are embedded as evenly as possible distributed over the heating surface and which are combined by a multi-stroke switch in various combinations of individual -, parallel and series connection can be switched to achieve several, usually seven, successive power levels (including the zero position). The series connection is provided as the lowest heat level. The arrangement of the heating resistors in these cast-iron hotplates is such that, if possible, all three heating resistors reach all areas, for example by arranging the three heating resistors in the form of a three-start parallel spiral.

Aufgabe der Erfindung ist es, ein Heizelement zu schaffen, das trotz erhöhter Leistung bei guter Herstellbarkeit eine gleichmässige Wärmeverteilung bei Einschaltung beider Heizzonen erlaubt.The object of the invention is to provide a heating element which, despite increased performance and good manufacturability, permits uniform heat distribution when both heating zones are switched on.

Die Erfindung löst diese Aufgabe dadurch, dass ein im äusseren Bereich des Heizelementes angeordneter Vorschalt-Heizwiderstand einem Zentral-Heizwiderstand in Reihe vorschaltbar und in einem Schaltzustand des Temperaturbegrenzers abschaltbar ist.The invention achieves this object in that a series heating resistor arranged in the outer region of the heating element can be connected in series to a central heating resistor and can be switched off in a switching state of the temperature limiter.

Dadurch kann in dem Zentral-Heizwiderstand in der Mittelzone eine hohe Leistung bei hoher spezifischer Heizflächenbelastung installiert werden, während durch den Vorschalt-Heizwiderstand auf die Gesamtheizfläche des Heizelementes eine gleichmässige Leistungsverteilung erreicht wird. Dazu kann bei einem bevorzugten Ausführungsbeispiel der Vorschaltwiderstand in dem äusseren Bereich bzw. der Heizzone zusätzlich zu einem weiteren Heizwiderstand angeordnet sein, der mit dem Zentral-Heizwiderstand beispielsweise parallel geschaltet sein kann. Die Leistungsverteilung ist dabei beliebig einzustellen. Beim Betrieb beider Bereiche kann die spezifische Heizflächenbelastung der Mittelzone infolge des Vorschalt-Heizwiderstandes geringer werden. Diese Ausführungsform ist auch für Heizelemente geeignet, die bewusst zwei verschieden grosse oder unterschiedlich gestaltete Heizzonen haben, die entsprechend der Topfgrösse oder -form unterschiedlich eingeschaltet werden.As a result, a high output with a high specific heating surface load can be installed in the central heating resistor in the central zone, while a uniform power distribution is achieved by the series heating resistor over the entire heating surface of the heating element. For this purpose, in a preferred exemplary embodiment the ballast resistor can be arranged in the outer region or the heating zone in addition to a further heating resistor which can be connected in parallel with the central heating resistor, for example. The power distribution can be set as desired. When operating both areas, the specific heating surface load of the central zone can be reduced due to the series heating resistance. This embodiment is also suitable for heating elements which deliberately have two differently sized or differently designed heating zones which are switched on differently depending on the size or shape of the pot.

Die Anordnung von zwei Bereichen, die im Betrieb kaum voneinander getrennt sind, kann auch sinnvoll sein. Es kann auch die Allein-Einschaltung eines Heizwiderstandes einer Leistungserhöhung in einer Ankochphase oder dgl. dienen. Erfindungsgemäss kann der Vorschalt-Heizwiderstand zur Minderung einer in dem Zentral-Heizwiderstand vorgesehenen erhöhten Einschaltleistung auf Normalleistung vorgeschaltet sein. Wenn dabei der Vorschalt-Heizwiderstand eine mittlere, den anderen Heizwiderstand enthaltende Heizzone eng umgibt, so ergibt sich eine Gesamtkochfläche, die oft nicht wesentlich grösser ist, als die, die vom Zentral-Heizwiderstand eingenommen wird.The arrangement of two areas that are hardly separated from each other during operation can also be useful. It is also possible to switch on a heating resistor alone to increase the power in a parboiling phase or the like. According to the invention, the ballast heating resistor can be connected upstream to normal power in order to reduce an increased switch-on power provided in the central heating resistor. If the pre-heating resistor closely surrounds a central heating zone containing the other heating resistor, the result is a total cooking surface which is often not significantly larger than that occupied by the central heating resistor.

In einem Ankochbereich kann eine erhöhte konzentriertere Leistung geschaffen werden, die im Zusammenwirken mit den in diesem Zustand auch noch kalten Kochgefässen und der damit stärkeren Kühlung der Glaskeramikplatte auch einen erhöhten Leistungsdurchsatz bewirkt.In a parboiler area, an increased, more concentrated output can be created, which, in cooperation with the cooking vessels, which are still cold in this state, and thus the stronger cooling of the glass ceramic plate, also results in an increased output throughput.

Die eingeschaltete Gesamtkochfläche mit Vorschalt-Heizwiderstand hat, insbesondere zum Einschaltzustand, eine geringere Gesamtleistung als die Mittelzone allein. Der äussere Bereich kann insofern in eine Gesamtwicklung integriert sein, dass sie die äussere der spiralförmig gelegten Windungen beider Heizzonen einnimmt.The total cooking surface switched on with a series heating resistor has a lower overall output than the central zone alone, especially when switched on. The outer area can be integrated into an overall winding to the extent that it takes up the outer of the spirally laid turns of both heating zones.

Die DE-A-30 07 037 zeigt auch, bei Heizelementen mit zwei Bereichen, entsprechend der bei einer Heizzone nur auf einen bestimmten Bereich beschränkten Wärmeeinwirkung auf den Temperaturfühler eines Temperaturbegrenzers, diesen mit Schaltern unterschiedlicher Ansprechtemperatur auszurüsten, um eine Abschaltung bei vergleichbarer Oberflächentemperatur der Glaskeramikplatte zu erreichen. Dabei ist es dann nötig, zwischen dem Steuergerät und dem Heizelement vier Zuleitungen zu verlegen und den Zuschalter für die zweite Heizzone als Doppelschalter auszubilden. Wenn bei einem besonders bevorzugten Ausführungsbeispiel der Erfindung ein Temperaturbegrenzer mit zwei Kontakten unterschiedlicher Ansprechtemperatur vorgesehen ist, von denen der mit niedriger Ansprechtemperatur als Umschaltkontakt ausgebildet ist, wird dieses Problem gelöst. Der Umschalter schaltet dabei den auch einzeln einzuschaltenden Heizwiderstand bei Erreichen der niedriger justierten Ansprechtemperatur von einem Stromzweig vor dem Zuschalter auf einen Stromzweig hinter dem Zuschalter um, so dass er in Alleinschaltung ausgeschaltet ist, jedoch bei Einschaltung beider Heizzonen wieder mit seiner ggf. durch den Vorwiderstand erniedrigten Leistung eingeschaltet ist. Diese Schaltung benötigt nur drei Kochplattenzuleitungen und einen einfachen Schalter für die Zuschaltung der zweiten Heizzone.DE-A-30 07 037 also shows, in the case of heating elements with two areas, in accordance with the heat effect on the temperature sensor of a temperature limiter which is limited to only a certain area in a heating zone, to equip it with switches of different response temperature in order to switch off at a comparable surface temperature of the glass ceramic plate to reach. It is then necessary to lay four supply lines between the control unit and the heating element and to design the switch for the second heating zone as a double switch. If, in a particularly preferred exemplary embodiment of the invention, a temperature limiter is provided with two contacts of different response temperature, of which the one with a low response temperature is designed as a changeover contact, this problem is solved. The changeover switch switches the heating resistor, which can also be switched on individually, when the lower adjusted response temperature is reached from a current branch upstream of the switch to a current branch downstream of the switch, so that it is switched off on its own, but when both heaters are switched on zones is switched on again with its power possibly reduced by the series resistor. This circuit only requires three hotplate feed lines and a simple switch for connecting the second heating zone.

Weitere Vorteile und Merkmale der Erfindung ergeben sich aus den Unteransprüchen und der Beschreibung im Zusammenhang mit den Zeichnungen. Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden im folgenden näher erläutert. Es zeigen:Further advantages and features of the invention emerge from the subclaims and the description in connection with the drawings. Embodiments of the invention are shown in the drawing and are explained in more detail below. Show it:

Fig. 1 und 2 schematische Draufsichten und Schaltbilder je eines Heizelementes und seiner Steuerung.1 and 2 are schematic top views and circuit diagrams of a heating element and its control.

In der Zeichnung ist ein Strahlungsheizelement 11 für eine Glaskeramikkochplatte eines Kochherdes dargestellt. Es enthält auf einem Isolierträger 12 Heizwiderstände 13, 14, 15, die aus Drahtwendeln bestehen, die in Form von Kreisbögen, Spiralen oder Doppel-Spiralen auf der Oberfläche des Isolierträgers befestigt sind. Sie sind in zwei im folgenden als Heizzonen 16,17 bezeichnete Bereichen angeordnet, wobei die mittlere Heizzone 16 den Heizwiderstand 13 enthält und von einer ringförmigen Heizzone 17 mit wesentlich grösserer Gesamtfläche umgeben ist, in der ein Haupt-Heizwiderstand 14 in Form einer Ringschlaufe mit vier zueinander parallel verlaufenden Wendeln angeordnet, wobei jedoch zwischen den beiden äusseren Strängen über einen Sektor von beispielsweise 60° der Heizwiderstand 15 in Form einer einfachen, gebogenen Schlaufe angeordnet ist und dort den Haupt-Heizwiderstand 14 auf die vier Stränge ergänzt.In the drawing, a radiant heating element 11 is shown for a glass ceramic hotplate of a cooker. It contains on an insulating support 12 heating resistors 13, 14, 15, which consist of wire coils, which are attached in the form of arcs, spirals or double spirals on the surface of the insulating support. They are arranged in two areas, hereinafter referred to as heating zones 16, 17, the central heating zone 16 containing the heating resistor 13 and being surrounded by an annular heating zone 17 with a substantially larger total area, in which a main heating resistor 14 in the form of an annular loop with four Coils running parallel to one another, but the heating resistor 15 is arranged in the form of a simple, curved loop between the two outer strands over a sector of, for example, 60 ° and supplements the main heating resistor 14 on the four strands there.

Diametral über beide Heizzonen 16, 17 hinweg ragt ein stabförmiger Temperaturfühler 18 eines Temperaturbegrenzers 19, der die Glaskeramikplatte durch Abschaltung der Heizwiderstände vor einer schädlichen Überhitzung schützt. Der Temperaturbegrenzer enthält zwei Schaltkontakte 20, 21, die auf unterschiedliche Ansprechpunkte justiert sind und von denen der Kontakt 21 ein Umschaltkontakt ist.A rod-shaped temperature sensor 18 of a temperature limiter 19 protrudes diametrically over both heating zones 16, 17 and protects the glass ceramic plate from harmful overheating by switching off the heating resistors. The temperature limiter contains two switching contacts 20, 21 which are adjusted to different response points and of which the contact 21 is a changeover contact.

Ein taktendes Leistungssteuergerät 22 dient zur Steuerung der Leistung. Es enthält ein von einem Steuerheizwiderstand 24 beheiztes Bimetall 23, das auf einen Schalter 25 einwirkt, wobei über einen Einstellknopf 26 die dadurch in unterschiedlicher relativer Einschaltdauer getaktete Leistung einstellbar ist. Durch einen Zusatzschalter 27 ist die äussere Heizzone 17 zuschaltbar.A clocking power control device 22 is used to control the power. It contains a bimetal 23 which is heated by a control heating resistor 24 and which acts on a switch 25, the power which is thereby clocked in different relative operating times being adjustable via an adjusting knob 26. The outer heating zone 17 can be activated by an additional switch 27.

Die Leistungszuführung zum Heizelement 11 erfolgt über den Schalter 25 und den auf eine höhere Temperatur justierten Kontakt 20 des Temperaturbegrenzers 19. An diesen Zweig 28 sind die Heizwiderstände 14 und 13 geschaltet. Das andere Ende des mittleren Heizwiderstandes 13 läuft zum anderen Schaltkontakt 21 des Temperaturbegrenzers und kann dort auf zwei Anschlüsse verzweigt werden, die einerseits mit dem anderen Netzpol 29 und andererseits mit einer Zuleitung 30 zu dem Vorschalt-Heizwiderstand 15 in Verbindung stehen. Die jeweils anderen Enden der Heizwiderstände 14, 15 sind zusammen an den Schalter 27 gelegt.The power supply to the heating element 11 takes place via the switch 25 and the contact 20 of the temperature limiter 19 adjusted to a higher temperature. The heating resistors 14 and 13 are connected to this branch 28. The other end of the middle heating resistor 13 runs to the other switching contact 21 of the temperature limiter and can be branched there to two connections which are connected on the one hand to the other network pole 29 and on the other hand to a feed line 30 to the series heating resistor 15. The other ends of the heating resistors 14, 15 are put together at the switch 27.

Die Funktion des Heizelementes ist wie folgt (Fig. 1): Bei geöffnetem Schalter 27 wird lediglich die mittlere Heizzone 16 betrieben, beispielsweise wenn nur ein kleiner Topf erwärmt werden soll. Bei Einschaltung des Leistungssteuergerätes über den Einstellknopf 26 wird der Schalter 25 geschlossen und über den geschlossenen Kontakt 20 des Temperaturbegrenzers 19 und den in der in der Zeichnung dargestellten Lage befindlichen Umschaltkontakt 21 wird die mittlere Heizzone mit ihrer vollen Leistung betrieben, die beispielsweise ca. 40 bis 50% der Gesamtleistung des Heizelementes betragen kann. Dadurch wird eine relativ schnelle Erwärmung des kleinen Kochgefässes erzielt. Die mittlere Heizzone 16 heizt nur den mittleren Teil des Temperaturfühlers 18 auf volle Temperatur auf, so dass die resultierende Ausdehnung des Temperaturfühlers geringer ist, als bei vollständiger Beaufschlagung des Temperaturfühlers. Da der Umschaltkontakt auf einen niedrigeren Ansprechpunkt justiert ist, schaltet der Heizwiderstand 13 trotzdem bei der richtigen Begrenzungstemperatur ab. Der Umschaltkontakt 21 schaltet dann auf den Kontakt 31 um.The function of the heating element is as follows (Fig. 1): When the switch 27 is open, only the central heating zone 16 is operated, for example if only a small pot is to be heated. When the power control device is switched on via the setting knob 26, the switch 25 is closed and the middle heating zone is operated at its full power, for example approx Can be 50% of the total power of the heating element. This results in a relatively quick heating of the small cooking vessel. The middle heating zone 16 heats only the middle part of the temperature sensor 18 to full temperature, so that the resulting expansion of the temperature sensor is less than when the temperature sensor is fully loaded. Since the changeover contact is adjusted to a lower response point, the heating resistor 13 nevertheless switches off at the correct limiting temperature. The switch contact 21 then switches to the contact 31.

Wenn die äussere Heizzone 17 über den Zusatzschalter 27 eingeschaltet wird, so wird bei vorher kaltem Heizelement, d. h. noch nicht ansprechendem Kontakt 21, die ungeminderte Leistung des Heizwiderstandes 13, beispielsweise 900 Watt, und die Leistung des Heizwiderstandes 14 (z.B. 1400 Watt) eingeschaltet, so dass eine hohe Gesamtleistung zum Ankochen eingeschaltet ist. Da jetzt die gesamte Temperaturfühlerlänge beheizt wird, erfolgt die Umschaltung des Kontaktes 21 wesentlich früher, d.h. bei einer wesentlich unter der Begrenzungstemperatur liegenden Temperatur. Durch die Umschaltung auf den Kontakt 31 wird jetzt dem Heizwiderstand 13 der Heizwiderstand 15 in Reihe vorgeschaltet, so dass die Leistung des Heizwiderstandes 13 erheblich gemindert wird (beispielsweise auf 650 Watt), während der äusseren Heizzone ein wenn auch relativ geringer Leistungsanteil durch den Vorschaltheizwiderstand 15 hinzugefügt wird. Durch die entsprechende Bemessung der Heizwiderstände können die spezifischen Heizflächenbelastungen den Gegebenheiten angepasst werden. In jedem Falle ist es aber möglich, eine gleichmässige spezifische Heizflächenbelastung über die gesamte Fläche zu erzielen, oder sie im Mittelbereich sogar niedriger zu wählen.If the outer heating zone 17 is switched on via the additional switch 27, then with a previously cold heating element, i. H. not yet responding contact 21, the undiminished power of the heating resistor 13, for example 900 watts, and the power of the heating resistor 14 (e.g. 1400 watts) switched on, so that a high total power for boiling is switched on. Since the entire temperature sensor length is now heated, the contact 21 is switched over much earlier, i.e. at a temperature significantly below the limit temperature. By switching to contact 31, heating resistor 15 is now connected in series to heating resistor 13, so that the power of heating resistor 13 is considerably reduced (for example to 650 watts), while the outer heating zone has a relatively small amount of power due to the pre-heating resistor 15 will be added. The specific heating surface loads can be adapted to the circumstances by appropriately dimensioning the heating resistors. In any case, it is possible to achieve a uniform specific heating surface load over the entire surface, or even to choose a lower one in the central area.

Bei Erreichen der Begrenzungstemperatur schaltet der Kontakt 20 die Gesamtleistung ab und bei absinkender Temperatur wieder ein.When the limit temperature is reached, the contact 20 switches off the total power and switches it on again when the temperature drops.

Von der dargestellten Ausführungsform sind zahlreiche Abwandlungen möglich. So kann beispielsweise die Anordnung der Heizwiderstände unterschiedlich sein. Statt der auf ein Ringsegment begrenzten Anordnung des Zuschalt-Heizwiderstandes 15 könnte dieser beispielsweise auch als eine um das gesamte Heizelement umlaufende Windung angeordnet sein. In jedem Falle bleibt der Vorteil, dass durch den Vorschalt-Heizwiderstand nicht nur die Leistung der anderen Heizzone gemindert wird, sondern auch die Zuschaltheizzone 17 eine zusätzliche Leistung durch den Vorschalt-Heizwiderstand erhält.Numerous modifications are possible from the illustrated embodiment. For example, the arrangement of the heating resistors can be different. Instead of the arrangement of the switch-on heating resistor 15, which is limited to a ring segment, this could also be arranged, for example, as a winding that runs around the entire heating element. In any case, the advantage remains that the ballast heating resistor not only reduces the performance of the other heating zone, but also that Switch-on heating zone 17 receives additional power from the ballast heating resistor.

Die Anordnung kann auch bei anderer als kreisförmig konzentrischer Anordnung brauchbar sein, beispielsweise bei einem Rechteckheizkörper mit einer zentralen runden Kochstelle und an beiden Seiten angesetzten Zusatzheizzonen, wobei die langgestreckt rechteckigen Kochflächen meist zum Wärmen benutzt werden und daher eine gleichmässige Leistungsverteilung besonders wichtig ist.The arrangement can also be useful with a configuration other than circularly concentric, for example with a rectangular heating element with a central round hotplate and additional heating zones attached on both sides, the elongated rectangular cooking surfaces being mostly used for heating and therefore a uniform power distribution is particularly important.

Der beschriebene Temperaturbegrenzer hat den Vorteil, dass durch den Umschalter 21 die beschriebenen Schaltmöglichkeiten mit nur einem Zusatzschalter 27 möglich sind, da der Umschalter beim Erreichen der niedrigeren Ansprechtemperatur den vorher allein eingeschalteten Heizwiderstand 13 dem Heizwiderstand 14 parallel schaltet, wobei ihm selbst der Vorschalt-Heizwiderstand 15 vorgeschaltet wird.The temperature limiter described has the advantage that the switch options described are possible with only one additional switch 27 as a result of the changeover switch 21, since when the lower response temperature is reached, the changeover switch switches the heating resistor 13, which was previously only switched on, in parallel with the heating resistor 14, with the ballast heating resistor itself 15 is connected upstream.

Fig. 2 zeigt ein Heizelement, bei dem zwar zwei Heizzonen 16a, 17a vorhanden sind, die jedoch nicht so deutlich voneinander getrennt sind wie bei Fig. 1. Sie sind nicht, wie in Fig. 1, dazu gedacht, Töpfe unterschiedlicher Grösse zu beheizen, sondern sind einer Kochstelle von einheitlicher Grösse zugeordnet. Dementsprechend hat der schüsselförmige Isolierkörper 35, in dem die Heizwiderstände 13a, 15a angeordnet sind, auch keine inneren Unterteilungen, sondern nur einen die aus beiden Heizzonen gebildete gemeinsame Kochstelle umgebenden Rand 36, der an der Unterseite der Glaskeramikplatte anliegt.FIG. 2 shows a heating element in which there are two heating zones 16a, 17a, but which are not as clearly separated from one another as in FIG. 1. They are not intended, as in FIG. 1, to heat pots of different sizes , but are assigned to a cooktop of a uniform size. Accordingly, the bowl-shaped insulating body 35, in which the heating resistors 13a, 15a are arranged, also has no internal subdivisions, but only an edge 36 surrounding the common cooking area formed from the two heating zones, which lies against the underside of the glass ceramic plate.

Bei gleichem Aufbau der Steuerschaltung 22 wie in Fig. 1 (gleiche Teile tragen gleiche Bezugszeichen), ist die Anordnung der Heizwiderstände so, dass der innere Heizwiderstand 13a den grössten Teil der Fläche einnimmt, während der äussere Heizwiderstand 15a praktisch auf die äussere Windung beschränkt ist. Dazu sind im Ausführungsbeispiel beide Heizelemente durchgehend in Form einer Doppelspirale, d. h. einer Spirale mit zwei parallelen, in der in der Heizelementmitte umkehrenden Windungen gelegt. Der äussere Heizwiderstand erstreckt sich zwischen einem Anschluss 37 und einer Anzapfung 38, die durch einen eingesetzten Verbindungsstift zwischen den Heizwiderständen 13a, 15a gebildet ist, während der mittlere Haupt-Heizwiderstand 13a zwischen einem Anschluss 39 am Inneren der äusseren Doppelwindung und der Anzapfung 38 angeschlossen ist.With the same structure of the control circuit 22 as in Fig. 1 (same parts have the same reference numerals), the arrangement of the heating resistors is such that the inner heating resistor 13a takes up most of the area, while the outer heating resistor 15a is practically limited to the outer winding . For this purpose, in the exemplary embodiment, both heating elements are continuous in the form of a double spiral, i. H. a spiral with two parallel turns in the reverse turns in the middle of the heating element. The outer heating resistor extends between a connection 37 and a tap 38, which is formed by an inserted connecting pin between the heating resistors 13a, 15a, while the central main heating resistor 13a is connected between a connection 39 on the inside of the outer double turn and the tap 38 .

Es ist ein Temperaturbegrenzer 19a vorgesehen, dessen Stab-Temperaturfühler 18a etwas aussermittig über beide Beheizzonen 16a, 17a ragt. Der Temperaturbegrenzer 19a hat nur einen einfachen Schaltkontakt, der bei Erreichen der Ansprechtemperatur geöffnet wird.A temperature limiter 19a is provided, the rod temperature sensor 18a of which projects somewhat eccentrically over both heating zones 16a, 17a. The temperature limiter 19a has only a simple switching contact, which is opened when the response temperature is reached.

Die Funktion ist wie folgt (Fig. 2):The function is as follows (Fig. 2):

Wenn der Schalter 27 geschlossen ist, ist der Heizwiderstand 13a allein eingeschaltet, der eine vergleichsweise grosse Leistung hat. Sie entspricht einer Ankochleistung, d.h. einer höheren Leistung als das Heizelement im Dauerzustand haben soll. Der Draht, aus dem die Heizwendel 13a besteht, kann daher relativ dick sein und ist somit leicht zu verlegen und thermisch und mechanisch dauerhaft. Diese Leistung wird nach dem Ansprechen des Leistungssteuergerätes 23, 24, 25 entsprechend dem eingestellten Leistungswert getaktet. Wenn der Schalter 27 geöffnet wird, so ist der vorher kurzgeschlossene Heizwiderstand 15a in Reihe vor den Heizwiderstand 13a geschaltet, so dass beide Heizwiderstände nun zusammen eine geringere Leistung haben als der Heizwiderstand 13a allein. Bei dieser Stellung sind also beide Heizzonen 16a, 17a eingeschaltet und es ergibt sich eine gleichmässiger verteilte, jedoch niedrigere Leistung, die zum Fortkochen verwendet wird.When the switch 27 is closed, the heating resistor 13a alone is switched on, which has a comparatively large output. It corresponds to a parboiling rate, i.e. a higher output than the heating element should have in the permanent state. The wire from which the heating coil 13a is made can therefore be relatively thick and is therefore easy to lay and thermally and mechanically durable. This power is clocked according to the response of the power control device 23, 24, 25 according to the set power value. When the switch 27 is opened, the previously short-circuited heating resistor 15a is connected in series in front of the heating resistor 13a, so that both heating resistors together now have a lower output than the heating resistor 13a alone. In this position, both heating zones 16a, 17a are switched on and there is a more evenly distributed, but lower power which is used for continued cooking.

Obwohl es auf den ersten Blick sinnwidrig erscheint, die grössere Leistung auf einen kleineren Bereich, nämlich die innere Heizzone 16a, zu beschränken und bei der niedrigeren Leistung die grössere Fläche, nämlich beide Heizzonen 16a, 17a zusammen, zu verwenden, ergibt sich, dass ausser den Herstellungsvorteilen auch Betriebsvorteile auftreten. Obwohl bei der Ankochleistung die kleinere Abstrahlfläche zur Verfügung steht, hat sich in Versuchen gezeigt, dass sich die Ankochzeit nicht verlängert. Der in Alleinschaltung relativ hoch belastete Heizwiderstand 13a kommt sehr schnell zum Glühen, so dass die dem Heizelement innewohnende Totzeit merklich abgekürzt wird. Ferner wird der Temperaturbegrenzer 19a in seinem randnahen Bereich weniger schnell aufgeheitzt und es ergibt sich eine etwas verzögerte Abschaltung, die noch im Bereich des Zulässigen liegt, aber der Verkürzung der Anheizzeit zugutekommt. Auf der Seite des Kochgefässes ist ebenfalls die starke Leistungskonzentration im Anheizbereich weniger kritisch, da in diesem Bereich die Speisen noch kalt sind und nicht zum Ankochen oder teilweisen Verbrennen neigen, während im Fortkochbereich, wenn dies kritisch wird, die vergleichmässig niedrigere Leistung vorliegt. Auch die Lebensdauer der Heizelemente ist überraschend gut. Trotz der starken Belastung des Heizwiderstandes 13a während der Ankochphase wirkt sich dies nicht lebensdauermindernd aus, weil diese Zeit meist sehr kurz ist. Der Schalter 27 wird vorzugsweise manuell betätigt, könnte aber auch thermisch oder durch ein Zeitschaltwerk betätigt werden.Although at first glance it seems pointless to limit the larger output to a smaller area, namely the inner heating zone 16a, and to use the larger area, namely both heating zones 16a, 17a together, at the lower output, it results that except operational advantages also occur in the manufacturing advantages. Although the smaller radiation area is available for the parboiling power, tests have shown that the parboiling time is not extended. The heating resistor 13a, which is relatively highly loaded when switched on its own, glows very quickly, so that the dead time inherent in the heating element is markedly shortened. Furthermore, the temperature limiter 19a is heated up less quickly in its area near the edge and there is a somewhat delayed switch-off, which is still within the permissible range, but which benefits from the shortening of the heating-up time. On the side of the cooking vessel, the strong power concentration in the heating area is also less critical, since in this area the food is still cold and does not tend to boil or partially burn, while in the continued cooking area, if this becomes critical, the comparatively lower power is available. The service life of the heating elements is also surprisingly good. Despite the heavy load on the heating resistor 13a during the boil-up phase, this does not reduce the service life, because this time is usually very short. The switch 27 is preferably operated manually, but could also be operated thermally or by a timer.

Claims (10)

1. Radiant heating element (11) for heating glass ceramic plates in cookers, with at least two zones (16, 16a, 17, 17a) with timed, power-controlled electric heating resistors (13, 13a, 14, 15, 15a) and a thermal cut-out (19, 19a) with a temperature sensor (18, 18a) extending over both zones (16, 16a, 17, 17a), characterized in that a series heating resistor (15, 15a) arranged in the outer zone (17) of the heating element is connected in series with a central heating resistor (13, 13a) and can be disconnected in one switching state of the thermal cut-out (19, 19a).
2. Heating element according to claim 1, characterized in that the series heating resistor (15, 15a) surrounds the central heating resistor (13, 13a).
3. Heating element according to one of the preceding claims, characterized in that the series heating resistor (15) is provided in addition to a further heating resistor (14) in an outer zone (17), the specific heating surface loading of the outer heating zone (17) containing the series heating resistor (15) being the same or preferably higher than the specific heating surface loading of the other zone (16).
4. Heating element according to claim 3, characterized in that the series heating resistor (15) takes up part of the circumference and/or the radial extension of the outer zone (17).
5. Heating element according to claim 3, characterized in that the series heating resistor is arranged separately from the further heating resistor (14) of the corresponding zone (17).
6. Heating element according to claim 1, characterized in that the series heating resistor (15a) is series connected to a lower power for reducing an increased switching-in power in the central heating resistor (13a).
7. Heating element according to claim 6, characterized in that the series heating resistor (15a) closely surrounds a central zone (16a) containing the central heating resistor (13a), the series heating resistor (15a) being an outer heating coil turn.
8. Heating element according to one of the preceding claims, characterized in that the thermal cut-out (19) has two contacts (20, 21) with different response temperatures, whereof that with the lower response temperature is constructed as a changeover contact (21).
9. Heating element according to claim 8, characterized in that the changeover contact (21) connects in parallel the heating resistors (13, 14) in a central and an outer zone (16, 17) in an initial cooking phase and on switching over connects one of these heating resistors (13) in series with the series-connected heating resistor (15).
10. Heating element according to claim 8, characterized in that the changeover contact (21) is located in the lead to the associated heating resistor (13), is constructed as a reversing switch and on reaching its response temperature connects the heating resistor (13) associated therewith in parallel with the in each case next heating resistor (14), the switch (20) with the highest response temperature being in series with the common return line (28) of all the heating resistors (13, 14, 15).
EP83107991A 1982-09-16 1983-08-12 Heating element, especially radiant heating element for the heating of ceramic plates Expired EP0103741B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83107991T ATE38757T1 (en) 1982-09-16 1983-08-12 HEATING ELEMENT, ESPECIALLY RADIANT HEATING ELEMENT FOR HEATING GLASS-CERAMIC PLATES.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3234349 1982-09-16
DE19823234349 DE3234349A1 (en) 1982-09-16 1982-09-16 Heating element for glass-ceramic cooking surfaces
DE19833314501 DE3314501A1 (en) 1983-04-21 1983-04-21 Heating element, especially a radiant heating element for heating glass-ceramic plates
DE3314501 1983-04-21

Publications (3)

Publication Number Publication Date
EP0103741A2 EP0103741A2 (en) 1984-03-28
EP0103741A3 EP0103741A3 (en) 1984-07-25
EP0103741B1 true EP0103741B1 (en) 1988-11-17

Family

ID=25804505

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83107991A Expired EP0103741B1 (en) 1982-09-16 1983-08-12 Heating element, especially radiant heating element for the heating of ceramic plates

Country Status (7)

Country Link
US (1) US4511789A (en)
EP (1) EP0103741B1 (en)
AU (1) AU1912683A (en)
DE (1) DE3378516D1 (en)
ES (1) ES8406833A1 (en)
GR (1) GR81429B (en)
YU (1) YU44859B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0163106A1 (en) * 1984-05-12 1985-12-04 E.G.O. Elektro-Geräte Blanc u. Fischer Electric hot-plate
EP0176027A1 (en) * 1984-09-22 1986-04-02 E.G.O. Elektro-Geräte Blanc u. Fischer Radiative heating body for a cooking apparatus
EP0206597A1 (en) * 1985-06-11 1986-12-30 Micropore International Limited Improvements in or relating to infra-red heaters
EP0384659A2 (en) * 1989-02-20 1990-08-29 Emaco Ltd. Improvements in electric hotplates
EP0714223A2 (en) 1994-10-28 1996-05-29 E.G.O. Elektro-Geräte Blanc und Fischer GmbH & Co. KG Radiant heater
US5892206A (en) * 1995-11-30 1999-04-06 Ceramasdeed Limited Radiant electric heater arrangement and method of operating the same

Families Citing this family (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3315438A1 (en) * 1983-04-28 1984-10-31 E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen HEATING ELEMENT FOR HEATING COOKING, HEATING PLATES OR THE LIKE
DE3503648C2 (en) * 1984-09-22 1994-08-11 Ego Elektro Blanc & Fischer Radiant heaters for cooking appliances
US4695335A (en) * 1985-11-08 1987-09-22 R. W. Lyall & Company, Inc. Method for developing a predetermined fusing temperature in thermoplastic items
GB8601789D0 (en) * 1986-01-24 1986-02-26 Redring Electric Ltd Electric hobs & heating units
EP0234373A3 (en) * 1986-02-26 1988-03-02 E.G.O. Elektro-Geräte Blanc u. Fischer Cooking unit with radiant heating element
DE3622415A1 (en) * 1986-07-03 1988-01-07 Ego Elektro Blanc & Fischer BEAM RADIATOR
DE8711209U1 (en) * 1987-08-18 1987-10-01 E.G.O. Elektro-Geraete Blanc U. Fischer, 7519 Oberderdingen, De
GB8720054D0 (en) * 1987-08-25 1987-09-30 Micropore International Ltd Radiant electric heater assemblies
US4943706A (en) * 1988-04-18 1990-07-24 R. W. Lyall & Company, Inc. Method and apparatus for fusing thermoplastic materials
US5294778A (en) * 1991-09-11 1994-03-15 Lam Research Corporation CVD platen heater system utilizing concentric electric heating elements
ES2049180B1 (en) * 1992-09-17 1996-11-01 Eika S Coop Ltda IMPROVEMENTS IN RADIANT HEATERS.
US6469283B1 (en) * 1999-03-04 2002-10-22 Applied Materials, Inc. Method and apparatus for reducing thermal gradients within a substrate support
US6222247B1 (en) * 1999-12-02 2001-04-24 United Microelectronics Corp. Semiconductor resistor that can be withstand high voltages
DE10053415A1 (en) * 2000-10-27 2002-05-29 Bsh Bosch Siemens Hausgeraete Electric radiator
GB0115831D0 (en) * 2001-06-28 2001-08-22 Ceramaspeed Ltd Radiant electric heater
GB0203826D0 (en) * 2002-02-19 2002-04-03 Ceramaspeed Ltd Electric heater assembly
GB0217351D0 (en) * 2002-07-25 2002-09-04 Ceramaspeed Ltd Radiant electric heater
ES2222804B1 (en) * 2003-06-13 2005-10-01 Bsh Electrodomesticos España, S.A. PROCEDURE FOR HEATING A CONTAINER SENSITIVE TO THE TEMPERATURE AND CORRESPONDING WARMING DEVICE.
GB0316627D0 (en) * 2003-07-16 2003-08-20 Ceramaspeed Ltd Radiant electric heater
DE10356790A1 (en) * 2003-12-04 2005-07-07 BSH Bosch und Siemens Hausgeräte GmbH Heating device for fluids, water heaters and process for their preparation
US7038176B2 (en) * 2004-02-25 2006-05-02 Maytag Corporation Infinite temperature control for heating element of a cooking appliance
US7180038B2 (en) * 2004-08-03 2007-02-20 E.G.O. Elektro-Geraetebau Gmbh Device for switching on and off several heating mechanisms of cooking equipment as well as cooking equipment with such a device
US7230209B2 (en) * 2005-04-26 2007-06-12 Maytag Corporation Dual voltage infinite temperature control for an electric cooking appliance
US20080142505A1 (en) * 2006-12-18 2008-06-19 Bsh Home Appliances Corporation Low simmer heating element with mechanical switches
US8274020B2 (en) * 2010-05-04 2012-09-25 Whirlpool Corporation Apparatus and method of controlling a triple heating element of a cooking appliance
FR2985650B1 (en) 2012-01-16 2016-03-11 Seb Sa FOOD COOKING INFORMATION METHOD AND ASSOCIATED APPARATUS
ES1077312Y (en) * 2012-06-13 2012-09-28 Eika S Coop Cooking appliance adapted to a cooking hob, in particular ceramic hob
DE102013216290B4 (en) 2013-08-16 2015-09-03 E.G.O. Elektro-Gerätebau GmbH Heating device and method for operating a heating device
JP6219229B2 (en) * 2014-05-19 2017-10-25 東京エレクトロン株式会社 Heater feeding mechanism
DE102014215776A1 (en) * 2014-08-08 2016-02-11 BSH Hausgeräte GmbH Method for accelerating a cooking process, control device and cooking appliance therefor
DK3411629T3 (en) * 2016-02-01 2022-03-21 Evo Inc COOKING SYSTEM WITH SEVERAL HEATING ELEMENTS
KR102111109B1 (en) * 2017-02-21 2020-05-14 엘지전자 주식회사 The surface heater, the electric range comprising the same, and the manufacturing method for the same
CN108652424A (en) * 2018-06-13 2018-10-16 李金胜 A kind of electric food warmer heating system

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1696684A (en) * 1927-04-13 1928-12-25 Otto A Knopp Heater controller
FR888388A (en) * 1942-04-24 1943-12-10 Entpr S Electr Fribourgeoises Electric heating plate, the heating part of which is made up of at least two distinct parts
US2419083A (en) * 1943-01-12 1947-04-15 Proctor Electric Co Electrical cooking apparatus
US2450399A (en) * 1948-01-09 1948-09-28 Tappan Stove Co Indicator for electric ranges
US2666836A (en) * 1950-09-05 1954-01-19 Stiebel Theodor Electric controller for heating elements
DE1097586B (en) * 1954-11-30 1961-01-19 Karl Fischer Hot plate with multi-stage switch
US2906845A (en) * 1955-12-22 1959-09-29 Proctor Electric Co Parallel heating unit wattage controller system
AT235422B (en) * 1962-08-09 1964-08-25 Karl Fischer Temperature controlled mass cooking plate
US3257544A (en) * 1963-05-09 1966-06-21 Warren Electric Corp Heating circuits
DE1239034B (en) * 1964-03-10 1967-04-20 Ernst Dreefs Ges Mit Beschraen Seven-step control circuit for hotplates
DE2118407C3 (en) * 1971-04-16 1974-01-10 Bosch-Siemens Hausgeraete Gmbh, 7000 Stuttgart Arrangement for regulating the output of electric hotplates
DE2221874C3 (en) * 1972-05-04 1974-12-12 Bosch-Siemens Hausgeraete Gmbh, 7000 Stuttgart Arrangement for regulating the output of electric hotplates
FR2197294B1 (en) * 1972-08-24 1976-03-12 Siemens Elektrogeraete Gmbh
DE2347045A1 (en) * 1973-09-19 1975-03-27 Licentia Gmbh Electrically heated hotplate - has lower and higher cooking ranges with lower and higher powers respectively
DE2751991A1 (en) * 1977-11-22 1979-05-23 Ego Elektro Blanc & Fischer COOKING UNIT WITH A COOKING SURFACE formed by flattened tubular heating elements
SE8000898L (en) * 1979-02-07 1980-08-08 Micropore International Ltd DEVICE FOR DELETING COOKERS
GR69904B (en) * 1979-10-27 1982-07-20 Ego Elektro Blanc & Fischer
NZ196104A (en) * 1980-02-01 1984-08-24 Micropore International Ltd Cooker plate with twin element:thermal cut-out for one
DE3007037A1 (en) * 1980-02-26 1981-09-03 Ego Elektro Blanc & Fischer GLASS CERAMIC COOKER
DE8133341U1 (en) * 1980-11-17 1982-03-25 Micropore International Ltd., Droitwich, Worcestershire ELECTRIC RADIATION HEATER FOR COOKERS WITH GLASS CERAMIC COVER PANELS

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0163106A1 (en) * 1984-05-12 1985-12-04 E.G.O. Elektro-Geräte Blanc u. Fischer Electric hot-plate
EP0176027A1 (en) * 1984-09-22 1986-04-02 E.G.O. Elektro-Geräte Blanc u. Fischer Radiative heating body for a cooking apparatus
EP0206597A1 (en) * 1985-06-11 1986-12-30 Micropore International Limited Improvements in or relating to infra-red heaters
US4789772A (en) * 1985-06-11 1988-12-06 Micropore International Limited Infra-red heaters
US4910387A (en) * 1985-06-11 1990-03-20 Micropore International, Ltd. Infra-red heaters
EP0384659A2 (en) * 1989-02-20 1990-08-29 Emaco Ltd. Improvements in electric hotplates
EP0384659A3 (en) * 1989-02-20 1992-02-19 Emaco Ltd. Improvements in electric hotplates
EP0714223A2 (en) 1994-10-28 1996-05-29 E.G.O. Elektro-Geräte Blanc und Fischer GmbH & Co. KG Radiant heater
US5892206A (en) * 1995-11-30 1999-04-06 Ceramasdeed Limited Radiant electric heater arrangement and method of operating the same

Also Published As

Publication number Publication date
DE3378516D1 (en) 1988-12-22
GR81429B (en) 1984-12-11
YU44859B (en) 1991-04-30
ES525626A0 (en) 1984-07-16
EP0103741A3 (en) 1984-07-25
YU187483A (en) 1985-12-31
US4511789A (en) 1985-04-16
EP0103741A2 (en) 1984-03-28
AU1912683A (en) 1984-03-22
ES8406833A1 (en) 1984-07-16

Similar Documents

Publication Publication Date Title
EP0103741B1 (en) Heating element, especially radiant heating element for the heating of ceramic plates
EP0124778B1 (en) Electric cooking plate or hot plate
EP0250880B1 (en) Radiant heating element
EP0531987B1 (en) Electrical heating unit
EP0176027B1 (en) Radiative heating body for a cooking apparatus
AT403091B (en) HEATING DEVICE FOR RADIATION HEATERS HEATED WITH ELECTRIC ENERGY
DE3314501A1 (en) Heating element, especially a radiant heating element for heating glass-ceramic plates
AT392183B (en) HEATING ELEMENT FOR A GLASS CERAMIC COOKER
EP1448024B1 (en) Heating device with two areas
DE3526892C2 (en)
EP0371295B1 (en) Radiant heating element
DE3518124A1 (en) ELECTRIC COOKER
DE4022292A1 (en) ELECTRIC RADIATION HEATING ELEMENT
DE4224666C2 (en) Circuit of a radiant heater
WO2006015710A1 (en) Device for connecting a plurality of heating devices of a cooking appliance, and cooking appliance comprising one such device
EP0163106B1 (en) Electric hot-plate
DE2758465A1 (en) COOKING UNIT WITH AT LEAST TWO ELECTRIC COOKING PLATES
DE3735265A1 (en) Cooking appliance
DE19924298A1 (en) Cooking zone for hob with heating element with variable heating surface has effective heating surface that can be varied by mechanically altering geometry of heating element
EP3918958A1 (en) Pot base module for a kitchen appliance
EP0901309A2 (en) Power control device
DE102021202613A1 (en) Heating device for a cooktop and cooktop
EP0441139A2 (en) Control of cooking plates
EP2001267B1 (en) Method for controlling a hob and device for implementing the method
DE722105C (en) Device for controlling electrically heated heating devices, in particular large kitchen devices with resistance heating

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT CH DE FR GB IT LI NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): AT CH DE FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19850111

17Q First examination report despatched

Effective date: 19870206

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE FR GB IT LI NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19881117

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19881117

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19881117

REF Corresponds to:

Ref document number: 38757

Country of ref document: AT

Date of ref document: 19881215

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3378516

Country of ref document: DE

Date of ref document: 19881222

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ITF It: translation for a ep patent filed

Owner name: MODIANO & ASSOCIATI S.R.L.

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: BOSCH-SIEMENS HAUSGERAETE GMBH, MUENCHEN

Effective date: 19890817

Opponent name: CERAMASPEED LIMITED

Effective date: 19890816

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19910918

Year of fee payment: 9

PLAB Opposition data, opponent's data or that of the opponent's representative modified

Free format text: ORIGINAL CODE: 0009299OPPO

R26 Opposition filed (corrected)

Opponent name: CERAMASPEED LIMITED * 890817 BOSCH-SIEMENS HAUSGER

Effective date: 19890816

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19920824

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19920825

Year of fee payment: 10

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19930812

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19930813

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19940817

Year of fee payment: 12

EUG Se: european patent has lapsed

Ref document number: 83107991.8

Effective date: 19940310

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19950726

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19951018

Year of fee payment: 13

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

RDAG Patent revoked

Free format text: ORIGINAL CODE: 0009271

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT REVOKED

27W Patent revoked

Effective date: 19960123

GBPR Gb: patent revoked under art. 102 of the ep convention designating the uk as contracting state

Free format text: 960123

APAH Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOSCREFNO