EP0105968A1 - Electric heating device for ranges or cooking plates - Google Patents

Electric heating device for ranges or cooking plates Download PDF

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Publication number
EP0105968A1
EP0105968A1 EP82109694A EP82109694A EP0105968A1 EP 0105968 A1 EP0105968 A1 EP 0105968A1 EP 82109694 A EP82109694 A EP 82109694A EP 82109694 A EP82109694 A EP 82109694A EP 0105968 A1 EP0105968 A1 EP 0105968A1
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EP
European Patent Office
Prior art keywords
adhesive
heating coil
heat
holder
electric heating
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Granted
Application number
EP82109694A
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German (de)
French (fr)
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EP0105968B1 (en
Inventor
Ingo Dr. Dipl.-Ing. Bleckmann
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.)
ELPAG AG CHUR
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ELPAG AG CHUR
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Application filed by ELPAG AG CHUR filed Critical ELPAG AG CHUR
Priority to DE8282109694T priority Critical patent/DE3275804D1/en
Priority to AT82109694T priority patent/ATE26057T1/en
Priority to EP82109694A priority patent/EP0105968B1/en
Publication of EP0105968A1 publication Critical patent/EP0105968A1/en
Application granted granted Critical
Publication of EP0105968B1 publication Critical patent/EP0105968B1/en
Expired legal-status Critical Current

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    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/017—Manufacturing methods or apparatus for heaters

Definitions

  • the invention relates to an electric heating device for cookers or hot plates, in which a heat-resistant holder is arranged under a plate that is permeable to heat rays, in particular under a glass ceramic plate, in which at least one electric heating coil is fixed by means of an investment material, and a method and a device for Manufacture of such heaters.
  • ß known from DE-A-2 130 373 investment materials for electric heating spirals D , which are used in electrically heated hot plates. It is assumed that the hotplates are closed on all sides, as was customary in the past.
  • the investment can accordingly also be in powder form. It consists e.g. B. from quartz sand, kaolin, boric acid and magnesium oxide.
  • the heating coil In the cookers with so-called radiant hot plates that have been available on the market for a few years now, the heating coil must be arranged in a freely radiating manner under the glass ceramic plate which is permeable to heat rays. The heating coil can therefore no longer be "embedded". There are now a number of problems with the hotplates which do not occur in the case of closed hotplates, so that measures taken with the closed hotplates cannot be transferred to the hotplates. A major problem lies in the "climbing" of a spiral section. The heating coil must have a certain distance from the glass ceramic plate so that there is a corresponding efficiency. This distance is generally 10 mm.
  • the invention is based, to fix the heating coil in the groove bottom of the heating coil holder safely and with significantly reduced work in radiant hotplates.
  • Claim 2 describes a preferred embodiment, claim 4 a method for manufacturing and claim 5 a device for manufacturing the electrical heating devices.
  • a heating coil holder 1 made of good heat-insulating material has grooves 2 in the form of a double spiral on its surface.
  • the heating coil holder 1 is fastened to a glass ceramic plate 3 which extends generally continuously over the entire stove by means of fastening means (not shown).
  • the desired temperature is regulated by means of a thermostat sensor 4 and a thermostat 5.
  • the entire groove base of the double spiral is provided with an adhesive 6, into which the heating element 7 is pressed.
  • the heating coil holder 1 should have the poorest possible thermal conductivity so that the heat radiation downward is reduced as much as possible, it would be obvious in itself to use an adhesive 6 which also has poor thermal conductivity. Surprisingly, however, it was found that adhesives which have a relatively good thermal conductivity are considerably cheaper. If the thermal conductivity is improved by 10%, the temperature of the heating coil 0 drops by about 50, which doubles the service life of the heating coil. Due to the better heat transfer The elevations of the heating coil holder lying between the grooves also result in a substantial flattening of the temperature curve over the glass ceramic plate.
  • the device has a swivel arm 8, on which a stamp 9, z. B. a rubber stamp is attached.
  • the stamp 9 has elevations 10 which correspond exactly to the shape and arrangement of the grooves 2 - that is to say a counter-profile to the surface of the heating coil holder 1.
  • the stamp 9 is raised via the swivel arm 8 and swiveled via a heating coil holder 1 provided.
  • the elevations 10 enter the grooves 2 in the heating coil holder 1 and in this way wet the groove base with adhesive material.
  • the heating coil 7 can then be inserted into the grooves in the heating coil holder 1.
  • the heating coil is then fixed after the adhesive has dried. Practical tests showed that the fixing of the heating coil over its entire length in the base of the groove precludes the heating coil sections, as described at the beginning, from climbing up.
  • the heating coil holders 1 to be provided with adhesive can be arranged on a turntable 12, so that a correspondingly cyclical work with high production output is possible.
  • two stamps 9 can also be used, one of which is immersed in the adhesive bath 11, while the other is pressed onto the heating coil holder 1.

Abstract

1. An electric heating device for ranges or cooking plates, wherein a heat-resistant heater-filament holder (1) is arranged beneath a glass-ceramic plate transmissive to heat radiation, said beater-filament holder having grooves (2) within which an electric heater filament (7) is fixed by means of an adhesive (6), characterized in that the adhesive (6) has been coated continuously along the entire groove-bottom and has a heat-conductivity such that the heat is conducted to the raised portions of the heater-filament holder (1) which are located between the grooves (2), and the temperature of the heater-filament (7) is thereby lowered by at least 50 degrees C.

Description

Die Erfindung betrifft eine elektrische Heizeinrichtung für Herde oder Kochplatten, bei der unter einer für Wärmestrahlen durchlässigen Platte, insbesondere unter einer Glaskeramikplatte, eine hitzebeständige Halterung eingeordnet ist, in der mindestens eine elektrische Heizwendel mittels einer Einbettmasse fixiert ist, sowie ein Verfahren und eine Vorrichtung zur Herstellung derartiger Heizeinrichtungen.The invention relates to an electric heating device for cookers or hot plates, in which a heat-resistant holder is arranged under a plate that is permeable to heat rays, in particular under a glass ceramic plate, in which at least one electric heating coil is fixed by means of an investment material, and a method and a device for Manufacture of such heaters.

Es sind z. ß. aus der DE - A - 2 130 373 Einbettmassen für elektrische Heizspiralen Dekannt, welche bei elektrisch beheizten Kochplatten Anwendung finden. Dabei wird vorausgesetzt, daß die Kochplatten, wie früher üblich, allseitig geschlossen sind. Die Einbettmasse kann dementsprechend auch pulverförmig sein. Sie besteht z. B. aus Quarzsand, Kaolin, Borsäure und Magnesiumoxid.There are e.g. ß. known from DE-A-2 130 373 investment materials for electric heating spirals D , which are used in electrically heated hot plates. It is assumed that the hotplates are closed on all sides, as was customary in the past. The investment can accordingly also be in powder form. It consists e.g. B. from quartz sand, kaolin, boric acid and magnesium oxide.

Bei den seit einigen Jahren auf dem Markt erhältlichen Herden mit sogenannten Strahlkochplatten muß die Heizwendel frei strahlend unter der für Wärmestrahlen durchlässigen Glaskeramikplatte angeordnet werden. Die Heizwendel kann dementsprechend nicht mehr "eingebettet" werden. Es treten nun bei den Strahlkochplatten eine Reihe von Problemen auf, die bei geschlossenen Kochplatten nicht auftreten, so daß insoweit bei geschlossenen Kochplatten getroffene Maßnahmen nicht auf Strahlkochplatten übertragbar sind. Ein wesentliches Problem liegt in dem "Hochsteigen" eines Wendelabschnittes. Die Heizwendel muß einen bestimmten Abstand von der Glaskeramikplatte haben, damit sich ein entsprechender Wirkungsgrad ergibt. Dieser Abstand beträgt im allgemeinen 10 mm. Bei den im Luftraum zwischen der Heizwendel und der Glaskeramikplatte herrschenden Temperaturen tritt eine starke Ionisierung der Luft auf, und zwar durch von der Heizwendel abgestrahlte Ionen. Wenn nun die Heizwendel aufgrund der thermischen Belastung an einer Stelle um 1 - 2 mm hochsteigt, kann dies zu einem elektrischen Durchschlag mit entsprechender Gefährdung führen. Um dies zu verhindern, werden in der Praxis überwiegend U-förmige Haken in großer Anzahl verwendet, welche in die Heizwendelhalterung eingetrieben werden und die Heizwendel in den Rillen der Halterung halten. Es ist verständlich, daß das Anbringen einer großen Anzahl von U-förmigen Haken einen beträchtlichen Arbeitsaufwand darstellt, der jedoch nach den bisherigen Erkenntnissen als unvermeidbar angesehen wurde.In the cookers with so-called radiant hot plates that have been available on the market for a few years now, the heating coil must be arranged in a freely radiating manner under the glass ceramic plate which is permeable to heat rays. The heating coil can therefore no longer be "embedded". There are now a number of problems with the hotplates which do not occur in the case of closed hotplates, so that measures taken with the closed hotplates cannot be transferred to the hotplates. A major problem lies in the "climbing" of a spiral section. The heating coil must have a certain distance from the glass ceramic plate so that there is a corresponding efficiency. This distance is generally 10 mm. At the temperatures prevailing in the air space between the heating coil and the glass ceramic plate, there is a strong ionization of the air, namely by ions radiated by the heating coil. If the heating coil rises by 1 - 2 mm at one point due to the thermal load, this can lead to an electrical breakdown with a corresponding risk. To prevent this, a large number of U-shaped hooks are mainly used in practice, which are driven into the heating coil holder and hold the heating coil in the grooves of the holder. It is understandable that the installation of a large number of U-shaped hooks represents a considerable amount of work, which, however, has been considered inevitable according to the previous knowledge.

Der Erfindung liegt die Aufgabe zugrunde, bei Strahlkochplatten die Heizwendel in dem Rillengrund der Heizwendelhalterung sicher und mit wesentlich reduziertem Arbeitsaufwand zu fixieren.The invention is based, to fix the heating coil in the groove bottom of the heating coil holder safely and with significantly reduced work in radiant hotplates.

Die Lösung ergibt sich aus den kennzeichnenden Merkmalen des Hauptanspruchs. Anspruch 2 beschreibt eine bevorzugte Ausführungsform, der Anspruch 4 ein Verfahren zur Herstellung und Anspruch 5 eine Vorrichtung zur Herstellung der elektrischen Heizeinrichtungen.The solution results from the characteristic features of the main claim. Claim 2 describes a preferred embodiment, claim 4 a method for manufacturing and claim 5 a device for manufacturing the electrical heating devices.

Es zeigen:

  • Fig. 1 einen Schnitt durch eine Strahlkochplatte;
  • Fig. 2 in vergrößertem Maßstab einen Ausschnitt aus Fig. 1;
  • Fig. 3 eine Draufsicht auf die Strahlkochplatte;
  • Fig. 4 eine schematische Ansicht einer Vorrichtung zum Aufbringen eines Klebers in den Rillengrund der Heizwendelhalterung.
Show it:
  • 1 shows a section through a jet hotplate.
  • FIG. 2 shows an enlarged detail from FIG. 1;
  • 3 shows a plan view of the jet hotplate;
  • Fig. 4 is a schematic view of a device for applying an adhesive in the groove bottom of the heating coil holder.

Eine Heizwendelhalterung 1 aus gut wärmeisolierenden Material besitzt an ihrer Oberfläche Rillen 2 in Form einer Doppelspirale. Die Heizwendelhalterung 1 ist mittels nicht dargestellter Befestigungsmittel an einer sich im allgemeinen durchgehend über den gesamten Herd erstrekkenden Glaskeramikplatte 3 befestigt. Die erwünschte Temperatur wird mittels eines Thermostatfühlers 4 und eines Thermostaten 5 einreguliert.A heating coil holder 1 made of good heat-insulating material has grooves 2 in the form of a double spiral on its surface. The heating coil holder 1 is fastened to a glass ceramic plate 3 which extends generally continuously over the entire stove by means of fastening means (not shown). The desired temperature is regulated by means of a thermostat sensor 4 and a thermostat 5.

Im Unterschied zu bekannten Lösungen wird der gesamte Rillengrund der Doppelspirale mit einem Kleber 6 versehen, in welchen die Heizwenel 7 eingedrückt wird.In contrast to known solutions, the entire groove base of the double spiral is provided with an adhesive 6, into which the heating element 7 is pressed.

Da die Heizwendelhalterung 1 eine möglichst schlechte Wärineleitfähigkeit haben soll, damit die Wärmeabstrahluig nach unten möglichst reduziert wird, wäre es an und für sich naheliegend, einen Kleber 6 zu verwenden, der ebenfalls eine schlechte Wärmeleitfähigkeit besitzt. Es zeigte sich jedoch überrachenderweise, daß Kleber, die eine relativ gute Wärmeleitfähigkeit haben, wesentlich günstiger sind. Wenn die Wärmeleitfähigkeit um 10 % verbessert wird, dann sinkt die Temperatur der Heizwendel 0 um etwa 50 , wodurch sich die Lebensdauer der Heizwendel verdoppelt. Durch die bessere Wärmeübertragung auf die zwischen den Rillen liegenden Erhebungen der Heizwendelhalterung ergibt sich auch eine wesentliche Abflachung der Temperaturkurve über der Glaskeramikplatte.Since the heating coil holder 1 should have the poorest possible thermal conductivity so that the heat radiation downward is reduced as much as possible, it would be obvious in itself to use an adhesive 6 which also has poor thermal conductivity. Surprisingly, however, it was found that adhesives which have a relatively good thermal conductivity are considerably cheaper. If the thermal conductivity is improved by 10%, the temperature of the heating coil 0 drops by about 50, which doubles the service life of the heating coil. Due to the better heat transfer The elevations of the heating coil holder lying between the grooves also result in a substantial flattening of the temperature curve over the glass ceramic plate.

Die Lösung, den gesamten Rillengrund mit Klebstoff zu bestreichen, erscheint auf den ersten Augenblick als zu aufwendig, als daß eine praktische Realisierung möglich wäre. Es zeigt sich jedoch, daß dieses Problem mittels einer Vorrichtung gelöst werden kann, wie sie schematisch in Figur 4 dargestellt ist.At first glance, the solution of coating the entire groove base with adhesive appears to be too complex to be practically possible. It turns out, however, that this problem can be solved by means of a device as shown schematically in FIG.

Die Vorrichtung besitzt einen Schwenkarm 8, an welchem ein Stempel 9, z. B. ein Gummistempel, befestigt ist. Der Stempel 9 besitzt Erhebungen 10, die genau der Form und Anordnung der Rillen 2 entsprechen - also ein Gegenprofil zur Oberfläche der Heizwendelhalterung 1. Durch Absenken des Stempels 9 in ein Kleberbad 11 werden die Erhebungen 10 des Stempels 9 mit Klebstoff benetzt. Der Der Stempel 9 wird über den Schwenkarm 8 angehoben und über eine bereitgestellte Heizwendelhalterung 1 verschwenkt. Beim Absenken des Stempels 9 treten die Erhebungen 10 in die Rillen 2 der Heizwendelhalterung 1 ein und benetzen auf diese Weise den Rillengrund mit Klebstoff. Anschließend kann die Heizwendel 7 in die Rillen der Heizwendelhalterung 1 eingelegt werden. Die Heizwendel ist dann nach Trocknen des Klebers fixiert. Praktische Versuche zeigten, daß die Fixierung der Heizwendel über ihre gesamte Länge im Rillengrund ausschließt, daß Heizwendelabschnitte, wie eingangs beschrieben, hochsteigen können.The device has a swivel arm 8, on which a stamp 9, z. B. a rubber stamp is attached. The stamp 9 has elevations 10 which correspond exactly to the shape and arrangement of the grooves 2 - that is to say a counter-profile to the surface of the heating coil holder 1. By lowering the stamp 9 into an adhesive bath 11, the elevations 10 of the stamp 9 are wetted with adhesive. The stamp 9 is raised via the swivel arm 8 and swiveled via a heating coil holder 1 provided. When the stamp 9 is lowered, the elevations 10 enter the grooves 2 in the heating coil holder 1 and in this way wet the groove base with adhesive material. The heating coil 7 can then be inserted into the grooves in the heating coil holder 1. The heating coil is then fixed after the adhesive has dried. Practical tests showed that the fixing of the heating coil over its entire length in the base of the groove precludes the heating coil sections, as described at the beginning, from climbing up.

Die mit Klebstoff zu versehenden Heizwendelhalterungen 1 können auf einem Drehtisch 12 angeordnet sein, so daß ein entsprechend taktweises Arbeiten mit hohem Produktionsausstoß möglich ist. Selbstverständlich können auch zwei Stempel 9 verwendet werden, von denen jeweils einer in das Klebstoffbad 11 eintaucht, während der andere auf die Heizwendelhalterung 1 aufgedrückt wird.The heating coil holders 1 to be provided with adhesive can be arranged on a turntable 12, so that a correspondingly cyclical work with high production output is possible. Of course, two stamps 9 can also be used, one of which is immersed in the adhesive bath 11, while the other is pressed onto the heating coil holder 1.

Claims (4)

1. Elektrische Heizeinrichtung für Herde oder Kochplatten, bei der unter einer für Wärmestrahlen durchlässigen Platte (3), insbesondere unter einer Glaskeramikplatte, eine hitzebeständige Halterung (1) angeordnet ist, die Rillen (2) besitzt, in denen eine elektrische Heizwendel (7) mittels einer Einbettmasse fixiert ist, dadurch gekennzeichnet , daß als Einbettmasse ein Kleber (6) mit relativ guter Wärmeleitfähigkeit vorgesehen ist, welcher durchgehend über den gesamten Rillengrund aufgetragen ist.1. Electric heating device for cookers or hot plates, in which a heat-resistant holder (1) is arranged under a plate (3) which is permeable to heat rays, in particular under a glass ceramic plate, which has grooves (2) in which an electric heating coil (7) is fixed by means of an investment material, characterized in that an adhesive (6) with relatively good thermal conductivity is provided as the investment material, which is applied continuously over the entire groove base. 2. Elektrische Heizeinrichtung nach Anspruch 1, da- durch gekennzeichnet, daß die Wärmeleitfähigkeit des Klebers (6) mindestens 10 % über derjenigen eines üblichen Klebers für Heizwendeln liegt.2. Electrical heating device according to claim 1, characterized in that the thermal conductivity of the adhesive (6) is at least 10% above that of a conventional adhesive for heating coils. 3. Verfahren zur Herstellung von Heizeinrichtungen nach Ansprüchen 1 und 2, dadurch gekennzeich-net, daß ein dem Rillenprofil des Heizwendelhalters (1) entsprechender Stempel (9) verwendet wird, der in die Klebermasse (11) eingetaucht und dann in das Rillenprofil eingedrückt wird.3. A method for producing heating devices according to claims 1 and 2, characterized in that a stamp (9) corresponding to the groove profile of the heating coil holder (1) is used, which in the Dipped adhesive (11) and then pressed into the groove profile. 4. Vorrichtung zur Durchführung des Verfahrens nach Anspruch 3, gekennzeichnet durch einen absenkbaren Schwenkarm (8),welcher einen dem Rillenprofil der Heizwendelhalterung entsprechenden Sternpel (9) trägt und welcher selbsttätig oder halbselbsttätig den Stempel(9) in die Klebermasse eindrückt, anhebt, verschwenkt und auf die Heizwendelhalterung (1) aufpreßt.4. Apparatus for carrying out the method according to claim 3, characterized by a lowerable swivel arm (8) which carries a star pile corresponding to the groove profile of the heating coil holder (9) and which automatically or semi-automatically presses the stamp (9) into the adhesive, raises, swivels and presses onto the heating coil holder (1).
EP82109694A 1982-10-20 1982-10-20 Electric heating device for ranges or cooking plates Expired EP0105968B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE8282109694T DE3275804D1 (en) 1982-10-20 1982-10-20 Electric heating device for ranges or cooking plates
AT82109694T ATE26057T1 (en) 1982-10-20 1982-10-20 ELECTRICAL HEATING DEVICE FOR COOKERS OR HOT PLATES.
EP82109694A EP0105968B1 (en) 1982-10-20 1982-10-20 Electric heating device for ranges or cooking plates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP82109694A EP0105968B1 (en) 1982-10-20 1982-10-20 Electric heating device for ranges or cooking plates

Publications (2)

Publication Number Publication Date
EP0105968A1 true EP0105968A1 (en) 1984-04-25
EP0105968B1 EP0105968B1 (en) 1987-03-18

Family

ID=8189292

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82109694A Expired EP0105968B1 (en) 1982-10-20 1982-10-20 Electric heating device for ranges or cooking plates

Country Status (3)

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EP (1) EP0105968B1 (en)
AT (1) ATE26057T1 (en)
DE (1) DE3275804D1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0189108A1 (en) * 1985-01-25 1986-07-30 Ceramaspeed Limited Heating device, especially for a cooking plate heated by radiation, and its manufacturing process
EP0210575A1 (en) * 1985-07-31 1987-02-04 E.G.O. Elektro-Geräte Blanc u. Fischer Electrical radiant heating element for heating hot plates, and process and device for its manufacture
DE3602541A1 (en) * 1986-01-29 1987-07-30 Rommelsbacher & Co Elektrowaer Heating filament support, hot plate provided therewith, and a method for its production
US4864105A (en) * 1986-10-25 1989-09-05 Ceramaspeed Limited Radiant heaters
EP0204185B1 (en) * 1985-05-30 1990-04-25 E.G.O. Elektro-Geräte Blanc u. Fischer Radiant-heating unit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2386956A1 (en) * 1977-04-04 1978-11-03 Gen Electric FLAT PLATE-SHAPED SURFACE HEATING SYSTEM
EP0041203A1 (en) * 1980-05-29 1981-12-09 Grünzweig + Hartmann und Glasfaser AG Arrangement for the thermally insulated accommodation of an electrical helical heating element, in particular for a cooking plate heated by radiation and method for its manufacture
FR2493660A1 (en) * 1980-10-27 1982-05-07 Bosch Siemens Hausgeraete Electrical tubular heater bonded to wall - esp. of bakery muffle oven by pref. silicone adhesive
DE3109300A1 (en) * 1981-03-11 1982-09-30 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Electric coffee machine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3102935A1 (en) * 1981-01-29 1982-09-02 Grünzweig + Hartmann und Glasfaser AG, 6700 Ludwigshafen DEVICE FOR THE HEAT-INSULATING STORAGE OF AN ELECTRIC HEATER, IN PARTICULAR FOR A RADIATION-HEATED COOKING PLATE, AND A HEAT-INSULATING PLATE THEREFOR AND METHOD FOR THE PRODUCTION THEREOF

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2386956A1 (en) * 1977-04-04 1978-11-03 Gen Electric FLAT PLATE-SHAPED SURFACE HEATING SYSTEM
EP0041203A1 (en) * 1980-05-29 1981-12-09 Grünzweig + Hartmann und Glasfaser AG Arrangement for the thermally insulated accommodation of an electrical helical heating element, in particular for a cooking plate heated by radiation and method for its manufacture
FR2493660A1 (en) * 1980-10-27 1982-05-07 Bosch Siemens Hausgeraete Electrical tubular heater bonded to wall - esp. of bakery muffle oven by pref. silicone adhesive
DE3109300A1 (en) * 1981-03-11 1982-09-30 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Electric coffee machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0189108A1 (en) * 1985-01-25 1986-07-30 Ceramaspeed Limited Heating device, especially for a cooking plate heated by radiation, and its manufacturing process
EP0204185B1 (en) * 1985-05-30 1990-04-25 E.G.O. Elektro-Geräte Blanc u. Fischer Radiant-heating unit
EP0210575A1 (en) * 1985-07-31 1987-02-04 E.G.O. Elektro-Geräte Blanc u. Fischer Electrical radiant heating element for heating hot plates, and process and device for its manufacture
DE3602541A1 (en) * 1986-01-29 1987-07-30 Rommelsbacher & Co Elektrowaer Heating filament support, hot plate provided therewith, and a method for its production
US4864105A (en) * 1986-10-25 1989-09-05 Ceramaspeed Limited Radiant heaters

Also Published As

Publication number Publication date
EP0105968B1 (en) 1987-03-18
ATE26057T1 (en) 1987-04-15
DE3275804D1 (en) 1987-04-23

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