EP0124778B1 - Plaque électrique de cuisinière ou plaque chauffante - Google Patents

Plaque électrique de cuisinière ou plaque chauffante Download PDF

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Publication number
EP0124778B1
EP0124778B1 EP84103808A EP84103808A EP0124778B1 EP 0124778 B1 EP0124778 B1 EP 0124778B1 EP 84103808 A EP84103808 A EP 84103808A EP 84103808 A EP84103808 A EP 84103808A EP 0124778 B1 EP0124778 B1 EP 0124778B1
Authority
EP
European Patent Office
Prior art keywords
heating
heating conductors
electric cooking
cooking plate
conductors
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
EP84103808A
Other languages
German (de)
English (en)
Other versions
EP0124778A1 (fr
Inventor
Felix Schreder
Leonhard Dörner
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
Application filed by EGO Elektro Gerate Blanc und Fischer GmbH filed Critical EGO Elektro Gerate Blanc und Fischer GmbH
Priority to AT84103808T priority Critical patent/ATE46994T1/de
Publication of EP0124778A1 publication Critical patent/EP0124778A1/fr
Application granted granted Critical
Publication of EP0124778B1 publication Critical patent/EP0124778B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • 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
    • 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 an electric hotplate or hotplate according to the preamble of claim 1.
  • From US-A-1 696 684 is a hotplate with heating conductors inserted into grooves in an insulating body, which is covered at the top by a cover plate.
  • the heating conductors lie in two parallel spiral yawns and are divided into two heating conductor sections by a tap. This arrangement is intended to increase the performance of the inner part by short-circuiting the outer heating conductor sections.
  • the effective radiator diameter is reduced and the performance spectrum or glow pattern changes significantly.
  • Electric hotplates in which an insulating support lies in a receiving shell and is arranged below a glass ceramic plate, have been described in DE-A1-2 729 929.
  • the heating conductors are arranged here in the form of wire spirals on a disk or card formed from insulating material, which in turn is located in a receiving shell and is surrounded at the bottom and laterally by insulating material.
  • a heating conductor is provided which is applied to a clocking, continuously adjustable power control device with power pulses of different relative duty cycles.
  • the mechanical structure of these heating elements has proven very successful. However, a power control device is required for this, which requires a certain amount of production, and such a relatively low-heat capacity heater often interferes with the clocking mode of operation.
  • the heating conductors are arranged spirally on the insulating support and can also, such as. B. from DE-A1-3 129 239, be placed in the form of a double spiral, in which the parallel branches of the same heating conductor are placed in a spiral which contains a reversing curve in the middle.
  • the distribution of the heating conductor over the surface is relatively even; however, there is the disadvantage that the full mains voltage is at the beginning between the branches running parallel to one another, so that a short circuit occurs in the event of a spiral deformation or a foreign body applied there.
  • the object of the invention is to provide a heating element of the type mentioned at the outset which, with a simple construction and a simplified arrangement of the heating conductors, enables an improved relationship between the heating conductor length and output.
  • connection options are improved because a total of only four connection points are required, namely z.
  • the invention can be advantageously applied to hotplates with a cast body in which the heating conductors are embedded in grooves in the hotplate body in an investment material.
  • use in radiant heaters with heating conductors arranged on an insulating support is particularly advantageous. This has the particular advantage that all heating conductors are made of relatively thick and therefore stable Wire can be made that can be easily attached to the insulating support, for example by partially embedding it in the insulating support material. With these radiant heaters, this creates the possibility of using a seven-cycle circuit. Here there is the advantageous possibility of switching off only part of the power via a temperature limiter if overheating occurs.
  • Such a temperature limiter is particularly important in the case of radiant heaters and must be accessed quickly and with low inertia, because otherwise the glass ceramic cooktop will overheat and be permanently damaged.
  • the switching frequency of the limiter can be significantly reduced by the seven-stroke circuit, so that radio interference is not to be feared.
  • FIG. 1 and 2 show an essentially circular heating element 11 which is designed for radiant heating of a glass ceramic plate 12.
  • the glass ceramic plate 12 forms a continuous hotplate, under which several radiant heating elements are arranged to create heated hotplates.
  • the heating element 11 has a similar design and is arranged under the glass ceramic plate as that according to DE-A1-2 729 929. It has a sheet metal support shell 13 in which there is an insulating layer 14 on which a relatively thin and mechanically stronger insulating carrier 15 is arranged which is held down and centered on its edge by an insulating ring 16.
  • Sheet metal tabs 17 on the upper edge of the carrier shell 13 are bent around a step of the insulating ring 16 and hold the unit together.
  • the upwardly projecting edge 18 of the insulating ring rests on the underside of the glass ceramic plate 12 under the force of a spring, not shown, which presses the entire heating element against the glass ceramic plate from below.
  • Heating conductors 19, 20, 21 are arranged on the insulating support, which consists of a fibrous, high-temperature-resistant insulating material and is relatively thin and mechanically quite firm by appropriate pressing, by partial pressing into the insulating support.
  • the heating conductors are pressed somewhat into the insulating support with the lower part of their turns, so that they are held by this without essential parts of their radiating surface being covered.
  • the heating conductors are therefore largely on the surface of the insulating support.
  • the three heating conductors 19, 20, 21 are arranged in the form of a two-start spiral, i. H. there are two spiral turns each parallel to one another, the two heating conductors 19, 21 being arranged one behind the other in one spiral passage, in the example shown the outer one.
  • the heating conductors are arranged at a relatively short distance from one another and leave in the middle an unheated middle zone 23, which is small in comparison to the thickness of the heating zone 22 formed around it, at the edge of which the two heating conductors 20, 21 end parallel next to one another.
  • this connection is in the form of two separate connection parts, which, however, are electrically connected to one another.
  • two inner connections 27, 28 are provided, which, like the connection 26, are welded to connection lines 35, which are designed as U-shaped brackets made of solid wire, through the insulating support 15 at the connections 26, 27, 28 and on the outer edge 18 inserted and welded there with lead wires 40 leading through the outer edge 18, which lead to an insulating connecting part 38 with plug-in terminal lugs 39.
  • the connecting lines 35 run on the underside of the insulating support 15, where they are embedded in the softer insulating layer 14. This means that all connection welds can be carried out from above.
  • the wire helixes can have different thicknesses and, if necessary, also helix diameters and helix pitch.
  • a common connecting piece 27' which has the shape of a sheet metal bracket inserted through the insulating support 15 with a divided leg, on the two sections of which the heating coils are pushed and fastened.
  • the connections 27, 28 are electrically connected to each other and the An connections 24, 25 individually connected.
  • the heating conductors 19, 21 do not need to have the same length, but can be of different lengths depending on the desired power distribution. Accordingly, the terminal 26 moves. It is also possible to design the two heating conductors 19, 21 in the form of a continuous heating resistor which has an electrical tap instead of the terminal 26.
  • the different heating conductors can have different outputs, for example the heating conductor 19,500 watts, the heating conductor 20,600 watts and the heating conductor 21,400 watts.
  • the outputs can be adapted to the requirements just like the heating conductor lengths, as can the circuit diagram mentioned above.
  • a further advantage can be seen that between the power levels 2 and 5 there is always an unheated one between the heated heating conductors, so that on the one hand there is less risk of a short circuit and on the other hand the glow pattern becomes uniform.
  • the relatively small unheated middle zone 23 also contributes to this.
  • the seven-cycle switch 32 does not depend on the voltage or power of the radiators depends on how these clocking power control units are mostly.
  • the temperature limiter 31 can be switched on in the common supply line leading to the connection 26 or in the common supply line leading to the connections 27 and 28 and thus switches off 900 or 1000 watts in the example of a 1500 watt heating element mentioned above. However, only a single heating conductor can be switched off. It can be seen that the released power in most switching stages is such that the limiter hardly needs to respond and has a low number of cycles, if it responds at all.
  • the temperature limiter can also connect the heating conductors in series to reduce the power.
  • the wire can be chosen thicker by the invention and is therefore easier to press into the insulating carrier in order to be fastened thereby.
  • the heating conductors achieve a higher temperature stability.
  • each of the two spiral paths has five turns or revolutions, which results in uniform heating. Depending on the absolute size of the heating element, this can advantageously also be four or six cycles.
  • the heating conductors can also be inserted in grooves in an insulating body.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Resistance Heating (AREA)
  • Baking, Grill, Roasting (AREA)
  • Cookers (AREA)
  • Electric Stoves And Ranges (AREA)
  • Table Devices Or Equipment (AREA)
  • Laminated Bodies (AREA)

Claims (12)

1. Plaque électrique de cuisson ou de chauffage comportant un dispositif de mise en circuit en vue de son fonctionnement ainsi que des conducteurs chauffants (19, 20, 21) disposés en deux pistes en spirales parallèles entre elles, susceptibles d'être mis en circuit séparément, une des pistes en spirale étant formées par deux conducteurs (19, 21) disposés l'un derrière l'autre, caractérisée par le fait que trois conducteurs chauffants (19, 20, 21) seulement sont disposés en deux pistes en spirales parallèles entre elles et que le dispositif de mise en circuit est un commutateur à sept positions (32) qui met en circuit les trois conducteurs chauffants (19, 20, 21) selon un branchement en parallèle, en série, ou individuellement.
2. Plaque électrique de cuisson ou de chauffage selon la revendication 1, caractérisée par le fait que deux branchements de conducteurs chauffants (24, 25) sont disposés dans la zone du pourtour extérieur de l'élément chauffant (11), qu'au moins un branchement (27, 28) de conducteur chauffant est disposé près d'une zone médiane (23), non chauffée de l'élément chauffant (11), et qu'au moins un branchement (26) de conducteur chauffant est disposé dans une zone de forme annulaire (22), située entre la zone médiane (23) et le contour extérieur.
3. Plaque électrique de cuisson ou de chauffage selon la revendication 2, caractérisée par le fait que le branchement (26) de conducteur chauffant prévu dans la zone de chauffage (22) est constitué par un piquage réalisé dans une résistance s'étendant d'un bout à l'autre et qu'au moins un branchement de conducteur électrique (27') situé à proximité de la zone médiane (23) est constitué par un branchement, de préférence commun, situé à l'extrémité des deux conducteurs (20, 21') qui s'étendent jusqu'à la zone médiane (23).
4. Plaque électrique de cuisson ou de chauffage selon une des revendications précédentes caractérisée par le fait que les conducteurs chauffants (19, 20, 21, 21') sont des hélices de fil.
5. Plaque électrique de cuisson ou de chauffage selon une des revendications précédentes, caractérisée par le fait que les deux pistes en spirale s'étendent parallèlement l'une à l'autre sur sensiblement la totalité de leur longueur.
6. Plaque électrique de cuisson ou de chauffage selon une des revendications précédentes, caractérisée par le fait qu'une des pistes en spirale, respectivement un des conducteurs chauffants (20), se termine avant l'emplacement de la zone médiane (23) non chauffée de l'élément chauffant (11) et que l'autre élément chauffant (21') s'étend au-delà d'au moins une partie d'un tour de spirale.
7. Plaque électrique de cuisson ou de chauffage selon une des revendications précédentes caractérisée par le fait que chacune des deux pistes en spirales parallèles entre elles comportent quatre à six, de préférence cinq enroulements ou tours.
8. Plaque électrique de cuisson ou de chauffage selon une des revendications précédentes, caractérisée par le fait qu'un limiteur de température (31) est prévu, lequel, lorsqu'il réagit, laisse encore en circuit une puissance partielle en mettant hors circuit des conducteurs chauffants, ou en les branchant en série.
9. Plaque électrique de cuisson ou de chauffage selon une des revendications précédentes, caractérisée par le fait qu'elle constitue un corps de rayonnement comportant des conducteurs chauffants disposés sur un support isolant (15).
10. Plaque électrique de cuisson ou de chauffage selon la revendication 9, caractérisée par le fait que le support isolant (15) a la forme d'une carte, respectivement d'un disque mince, sur laquelle sont fixés les conducteurs chauffants.
11. Plaque électrique de cuisson ou de chauffage selon la revendication 9 ou 10, caractérisée par le fait que les conducteurs chauffants s'étendent à la surface du support isolant (15) en y étant partiellement enfoncés.
12. Plaque électrique de cuisson ou de chauffage selon une des revendications 9 à 11, caractérisée par le fait que des conducteurs de branchement (35) destinés aux conducteurs chauffants (19, 20, 21) sont prévus lesquels s'étendent en partie en-dessous du support isolant (15) qui porte les conducteurs chauffants (19, 20, 21) et qui sont piqués à travers le support isolant (15) dans la zone des branchements (24 à 28) des conducteurs chauffants et dans la zone du bord du support isolant (15) et qui sont soudés aux branchements (24 à 28) ainsi qu'aux fils d'alimentation (40) à partir du haut.
EP84103808A 1983-04-28 1984-04-06 Plaque électrique de cuisinière ou plaque chauffante Expired EP0124778B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84103808T ATE46994T1 (de) 1983-04-28 1984-04-06 Elektrokoch- oder -heizplatte.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833315438 DE3315438A1 (de) 1983-04-28 1983-04-28 Heizelement zur beheizung von koch-, heizplatten oder dgl.
DE3315438 1983-04-28

Publications (2)

Publication Number Publication Date
EP0124778A1 EP0124778A1 (fr) 1984-11-14
EP0124778B1 true EP0124778B1 (fr) 1989-10-04

Family

ID=6197601

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84103808A Expired EP0124778B1 (fr) 1983-04-28 1984-04-06 Plaque électrique de cuisinière ou plaque chauffante

Country Status (10)

Country Link
US (1) US4538051A (fr)
EP (1) EP0124778B1 (fr)
JP (1) JPS59207587A (fr)
AT (1) ATE46994T1 (fr)
AU (1) AU570455B2 (fr)
CA (1) CA1209632A (fr)
DE (2) DE3315438A1 (fr)
ES (1) ES531984A0 (fr)
YU (1) YU45614B (fr)
ZA (1) ZA843132B (fr)

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DE3518124A1 (de) * 1985-05-21 1986-11-27 E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen Elektrokochgeraet
DE3541839A1 (de) * 1985-11-27 1987-06-04 Ako Werke Gmbh & Co Strahlungsheizvorrichtung fuer kochplatten
JPS6376294A (ja) * 1986-09-18 1988-04-06 松下電器産業株式会社 電熱ユニツト
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JPH0693439B2 (ja) * 1987-03-20 1994-11-16 株式会社日立製作所 半導体ウエハの熱処理装置
JPS6416090U (fr) * 1987-07-17 1989-01-26
DE8711209U1 (fr) * 1987-08-18 1987-10-01 E.G.O. Elektro-Geraete Blanc U. Fischer, 7519 Oberderdingen, De
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DE3914990A1 (de) * 1989-05-06 1990-11-08 Ako Werke Gmbh & Co Strahlungsheizeinrichtung
DE4022292A1 (de) * 1990-07-15 1992-01-16 Ego Elektro Blanc & Fischer Elektrisches strahlungsheizelement
GB2263379B (en) * 1992-01-10 1995-07-26 Ceramaspeed Ltd Radiant heater having multiple heating zones
DE4304540A1 (de) * 1993-02-11 1994-08-18 Belzig Elektrowaerme Gmbh Elektroanschluß für Heizelemente in Strahlungsheizkörpern
DE4320214A1 (de) * 1993-06-18 1994-12-22 Belzig Elektrowaerme Gmbh Anordnungen elektrischer Verbindungen und Elemente hierfür
GB2293952A (en) * 1994-10-05 1996-04-10 Redring Electric Ltd A heating unit for a ceramic hob
DE19527823A1 (de) * 1995-07-29 1997-01-30 Ego Elektro Blanc & Fischer Kochmuldeneinheit mit mehreren unterhalb einer Platte angeordneten Kochstellen
DE19527826C2 (de) * 1995-07-29 2002-05-08 Ego Elektro Geraetebau Gmbh Strahlungs-Kochstelleneinheit
DE19544652A1 (de) 1995-11-30 1997-06-05 Ako Werke Gmbh & Co Leistungs-Regeleinrichtung für eine Strahlungsbeheizung
DE29600274U1 (de) * 1996-01-09 1997-05-07 Ako Werke Gmbh & Co Heizelement
GB2336087B (en) * 1998-04-01 2002-02-13 Ceramaspeed Ltd Base for an electric heater and method of manufacture
US5973298A (en) * 1998-04-27 1999-10-26 White Consolidated Industries, Inc. Circular film heater and porcelain enamel cooktop
DE19839265A1 (de) * 1998-08-28 2000-03-02 Ego Elektro Geraetebau Gmbh Einrichtung zum Schalten einer elektrischen Heizung
US6225608B1 (en) 1999-11-30 2001-05-01 White Consolidated Industries, Inc. Circular film heater
GB2360683B (en) * 2000-03-23 2004-11-10 Ceramaspeed Ltd Radiant electric heater
US6455823B1 (en) 2000-10-06 2002-09-24 Illinois Tool Works Inc. Electrical heater with thermistor
GB0206738D0 (en) * 2002-03-22 2002-05-01 Ceramaspeed Ltd Electrical heating assembly
JP4026761B2 (ja) * 2002-03-28 2007-12-26 日本碍子株式会社 セラミックヒーター
GB0316627D0 (en) * 2003-07-16 2003-08-20 Ceramaspeed Ltd Radiant electric heater
DE102006023719B4 (de) * 2006-05-19 2021-06-10 BSH Hausgeräte GmbH Heizkörper für eine Kochmulde
JP6219229B2 (ja) * 2014-05-19 2017-10-25 東京エレクトロン株式会社 ヒータ給電機構
US10132504B1 (en) * 2017-05-15 2018-11-20 Backer Ehp Inc. Dual coil electric heating element
US11067288B2 (en) 2017-05-15 2021-07-20 Backer Ehp Inc. Dual coil electric heating element
DE102017222958A1 (de) * 2017-09-04 2019-03-07 E.G.O. Elektro-Gerätebau GmbH Heizeinrichtung und Verfahren zur Herstellung einer Heizeinrichtung
US11581156B2 (en) 2019-07-03 2023-02-14 Backer Ehp Inc. Dual coil electric heating element
USD955168S1 (en) 2019-07-03 2022-06-21 Backer Ehp Inc. Electric heating element
IT202100031361A1 (it) * 2021-12-14 2023-06-14 Marine Cookers Srls “migliorato piano cottura”
AT526173B1 (de) * 2022-05-20 2024-05-15 Ebner Ind Ofenbau Temperiereinrichtung

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DE1097586B (de) * 1954-11-30 1961-01-19 Karl Fischer Kochplatte mit Mehrstufenschalter
EP0103741A2 (fr) * 1982-09-16 1984-03-28 E.G.O. Elektro-Geräte Blanc u. Fischer Elément chauffant, en particulier élément chauffant radiant pour le chauffage de plaques en céramique

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Patent Citations (3)

* 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
DE1097586B (de) * 1954-11-30 1961-01-19 Karl Fischer Kochplatte mit Mehrstufenschalter
EP0103741A2 (fr) * 1982-09-16 1984-03-28 E.G.O. Elektro-Geräte Blanc u. Fischer Elément chauffant, en particulier élément chauffant radiant pour le chauffage de plaques en céramique

Also Published As

Publication number Publication date
DE3315438A1 (de) 1984-10-31
YU45614B (sh) 1992-07-20
ZA843132B (en) 1984-11-28
DE3480047D1 (en) 1989-11-09
ES8502306A1 (es) 1984-12-16
JPS59207587A (ja) 1984-11-24
AU2745284A (en) 1984-11-01
US4538051A (en) 1985-08-27
ATE46994T1 (de) 1989-10-15
EP0124778A1 (fr) 1984-11-14
YU73584A (en) 1986-10-31
ES531984A0 (es) 1984-12-16
AU570455B2 (en) 1988-03-17
CA1209632A (fr) 1986-08-12

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