EP0288915B2 - Radiateur à rayonnement électrique pour chauffer une plaque, en particulier une plaque vitrocéramique - Google Patents

Radiateur à rayonnement électrique pour chauffer une plaque, en particulier une plaque vitrocéramique Download PDF

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Publication number
EP0288915B2
EP0288915B2 EP88106444A EP88106444A EP0288915B2 EP 0288915 B2 EP0288915 B2 EP 0288915B2 EP 88106444 A EP88106444 A EP 88106444A EP 88106444 A EP88106444 A EP 88106444A EP 0288915 B2 EP0288915 B2 EP 0288915B2
Authority
EP
European Patent Office
Prior art keywords
temperature sensor
plate
heating element
insulator
radiant heating
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 - Lifetime
Application number
EP88106444A
Other languages
German (de)
English (en)
Other versions
EP0288915A3 (en
EP0288915A2 (fr
EP0288915B1 (fr
Inventor
Gerhard Gössler
Eugen Wilde
Robert Kicherer
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
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Application filed by EGO Elektro Gerate Blanc und Fischer GmbH filed Critical EGO Elektro Gerate Blanc und Fischer GmbH
Publication of EP0288915A2 publication Critical patent/EP0288915A2/fr
Publication of EP0288915A3 publication Critical patent/EP0288915A3/de
Application granted granted Critical
Publication of EP0288915B1 publication Critical patent/EP0288915B1/fr
Publication of EP0288915B2 publication Critical patent/EP0288915B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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 radiant heater for heating a plate, in particular a glass ceramic plate according to the generic term of claim 1.
  • a plate in particular a glass ceramic plate according to the generic term of claim 1.
  • Such radiant heater usually have a temperature sensor, the outer tube of an insulating Material, especially quartz or Quartz glass exists. It's either in that itself Expansion system of the sensor included, in which there is a pipe with a low coefficient of expansion forms in which a tension rod with higher Expansion coefficient is, or it is on a Expansion tube pushed on. This pipe will used to the required air or creepage distances in the space between heating resistors and the plate through which the temperature sensor runs through to ensure. It should be noted that glass ceramic plates at working temperature become electrically conductive, so that here the necessary Insulation distances are observed have to.
  • quartz glass tubes are not only relatively expensive, but also fragile and require special Measures during their installation on the radiant heater.
  • Such a temperature limiter with a quartz glass tube shows GB 2 181 896 B.
  • the Sensor for example on the wire-shaped expansion element, that runs inside the quartz glass tube
  • Spacers attached in the form of a ring. He's standing on the insulating body and can also on the glass ceramic plate support. In this respect, he could prevent himself from the insulating body the temperature sensor and this the Plate approaching.
  • EP-A1-0 116 861, DE-A1-3 007 037 and WO-A1-85 / 01 412 are radiant heaters what radiation shields became known for those facing the heating resistors Side of the temperature sensor or between adjacent longitudinal sections of the temperature sensor exhibit.
  • the object of the invention is to achieve this based on an electric radiant heater to create, with the self-insulation of the Temperature sensor can be dispensed with and this contributes to the fact that the insulating body remains flat.
  • the sensor tube which should preferably be metallic can and possibly also be grounded, and the heating resistors ensured. It is determined in tests that the most essential danger that falling below a predetermined air gap could be caused by the fact that in continuous operation the insulating body, which can be two-layer can bulge upwards and thus the heating resistors brings the sensor tube closer. Through the Spacers this is surely avoided.
  • the relatively stiff sensor tube ensures for the fact that the insulating body remains flat. The spacers do not need the temperature sensor constantly to lie on. Rather, it can be a certain Clearance should exist if ensured is that the spacer is the desired one Minimum clearance is still available. This Minimum distance can be, for example, 3 mm lie while including the total air distances the distance of the temperature sensor of the plate should be about 8 mm.
  • the previous temperature sensors had to their sensitive quartz tubes very flexible be arranged and were preferably in after slots open at the top of an otherwise circumferential one Edge of the insulating body and a surrounding Carrier shell inserted and had in this Recesses game to avoid tension allow.
  • the temperature sensor can now also be used and thus the whole controller is largely rigid by, for example, using his mostly slightly tapered free end in an after closed hole at the top of the carrier shell is inserted, while the switch side with a Bracket firmly on the carrier shell of the Radiant heater can be attached.
  • the insulating edges can be closed at the top and provide more complete insulation.
  • the temperature sensor can thus be in relatively narrow Holes are inserted in the edge and forms practical a seal to the outside.
  • FIGS 1 to 3 show a radiant heater 11, for heating a glass ceramic plate 12 a hob or a stove is provided.
  • the radiant heater is by not shown spring elements to the Pressed underside of the plate 12. It consists of a sheet metal carrier shell 13 with a bottom and a circumferential raised edge 14.
  • an insulating body 15 with another Insulating layer 16 is underlaid.
  • the insulating layer 16 consists of a highly insulating, but less firm Insulating material, for example a bulk material from microporous fumed silica.
  • the insulating body 15 is also bowl-shaped with a relatively thin bottom 19 and one circumferential edge 17, which is slightly above protrudes the edge 14 of the sheet metal carrier shell and by the pressure springs on the underside 18 of the Plate 12 is pressed.
  • the bottom 19 At the top of the bottom 19 are electrical Heating resistors 20 in the form of wire coils attached. happenss in the present example by partially pressing in the coils in the still moist molding of the insulating body 15.
  • the bottom has a star shape Ribs 21, in which the heating coils a little further are indented while they are otherwise little penetrate into the insulating body. This creates a safe one that does not hinder the radiation Determination of the heating coils.
  • it is also any other type of definition possible, for example by putty or the like, and there are others Insulating materials or configurations of the insulating body applicable in the context of the invention.
  • a temperature sensor 23 of a temperature switch 24 which is a temperature limiter or a temperature protection switch is to ensure that the Bottom 18 of the plate 12 in its temperature a certain value remains limited because, for example Glass ceramic plates in the event of overheating suffer permanent damage.
  • the switch head 25 of the temperature switch, 24 the at least a snap switch and possibly a second one Contact as a signal contact for signaling the Contains hot condition of the plate is outside of Insulating body firmly on an angular holder 26 attached, which is screwed to the carrier shell 13 is.
  • the temperature sensor 23 is elongated and rod-shaped.
  • a metal tube 27 in which a ceramic rod 28 lies (FIG. 3), a lower one than the metal pipe has thermal expansion coefficient, so that due to the difference in length in the switch head a snap switch can be operated.
  • the outer tube 27 tapers and has an internal thread provided so that via an adjusting screw 30, on which the ceramic rod 28 is supported, the Switch can be adjusted.
  • This structure of the Temperature switch is extremely simple and robust since the metal tube 27 is largely solid can be connected to the switch head 25 and also has no tendency to break.
  • the temperature sensor can therefore be advantageously fixed at both ends be mounted, i.e.
  • the temperature sensor runs through the room 22 through that it is a distance a from the Heating resistors and a distance b from the Plate. If you add the diameter d of the temperature sensor 23, the total distance results c from the bottom of the plate 12.
  • the distance a may have a certain minimum dimension not less than, and also the total distance a + b must not fall below a certain level, to comply with the safety regulations. Nevertheless, the distance c should be as small as possible be on the one hand the heating as close as possible to get to the glass ceramic plate and on the other hand, the total height or depth of the radiant heater to keep it as low as possible and to this extent the insulation through the insulating layers 15, 16 to make it as big as possible.
  • the variant shown in Fig. 4 has in remaining same construction a spacer 35a, the, like the spacer according to Figures 1 to 3, a contact surface 37 for the temperature sensor 23, but additionally has a contact surface 38 which the underside 18 of the plate 12 is opposite and can be supported on this.
  • the one with the lead 35a formed spacers thereby about an L shape. It can also be U-shaped be.
  • the temperature sensor can because it is not that additional quartz tube needed, with less Diameter d are produced, which in turn allows a reduction in height.
  • the sensor tube can be grounded, so that even in the case of a belly of the glass ceramic plate it as a protective grounded component over the Heating is located and prevents, for example a "broken" cooking vessel under tension is set.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Resistance Heating (AREA)
  • Electric Stoves And Ranges (AREA)
  • Control Of Resistance Heating (AREA)
  • Surface Heating Bodies (AREA)

Claims (6)

  1. Corps chauffant électrique (11) à rayonnement pour chauffer une plaque (12), en particulier une plaque vitrocéramique de cuisson, dans lequel des résistances électriques chauffantes (20) sont disposées sur un corps isolant (15), à distance de la plaque (12), et dans lequel une sonde thermométrique (23) d'un interrupteur thermostatique de sécurité (24), configurée en une barrette, s'étend d'un trait entre le corps isolant (15) et la plaque (12), au-dessus de la zone chauffante du corps chauffant à rayonnement qui détermine la région centrale, au moins un organe d'espacement (35), réalisé à la manière d'une came avec faible étendue dans le sens longitudinal de la sonde thermométrique (23), et affecté à cette dernière dans la région centrale de la zone chauffante, étant utilisé pour maintenir une distance minimale entre le corps isolant (15) ou les résistances chauffantes (20) disposées sur ce dernier et, respectivement, la sonde thermométrique (23) ou la plaque (12), ainsi que pour empêcher un bombement du corps isolant (15) vers le haut et pour rigidifier le corps chauffant (11) à rayonnement, caractérisé par le fait que l'organe d'espacement (35), placé dans la région non chauffée de la zone chauffante, est réalisé d'un seul tenant avec le corps isolant (15), sous la forme d'une saillie dudit corps isolant (15) qui est dirigée vers le haut ; et par le fait que la sonde thermométrique (23), réalisée munie d'un tube extérieur métallique, est montée dans une large mesure de façon rigide à l'extrémité considérée, et est enserrée de manière relativement rigide sur une tête de commutation (25) de l'interrupteur thermostatique de sécurité (24).
  2. Corps chauffant à rayonnement, selon la revendication 1 , caractérisé par le fait que l'organe d'espacement (35) présente une surface de contact (37) destinée à la sonde thermométrique (23), la sonde thermométrique (23) comportant, de préférence, une extrémité libre de réglage (29).
  3. Corps chauffant à rayonnement, selon l'une des revendications précédentes, caractérisé par le fait que l'organe d'espacement présente une surface d'appui (38) destinée à la face inférieure (18) de la plaque (12), et comporte une surface de contact (37) destinée à la sonde thermométrique.
  4. Corps chauffant à rayonnement, selon l'une des revendications précédentes, caractérisé par la présence d'au moins deux organes d'espacement (35) agencés, à distance l'un de l'autre, dans le sens longitudinal de la sonde thermométrique (23) et dont chacun se trouve dans une zone (36) non chauffée.
  5. Corps chauffant à rayonnement, selon l'une des revendications précédentes, caractérisé par le fait que l'organe d'espacement (35) présente une forme ronde observé en élévation et/ou une configuration en L ou en U observé en coupe transversale passant par le corps isolant (15).
  6. Corps chauffant à rayonnement, selon l'une des revendications précédentes, caractérisé par le fait que l'extrémité libre (29) de la sonde thermométrique (23) est guidée, pour l'essentiel sans aucune mobilité dans le sens latéral, dans un orifice (31) fermé en direction de la plaque (12) et pratiqué dans un rebord (14) d'une coquille de support (13), un orifice correspondant (32), pratiqué dans le rebord (17) du corps isolant (15), étant de préférence également fermé en direction de la plaque.
EP88106444A 1987-05-01 1988-04-22 Radiateur à rayonnement électrique pour chauffer une plaque, en particulier une plaque vitrocéramique Expired - Lifetime EP0288915B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8706277U DE8706277U1 (fr) 1987-05-01 1987-05-01
DE8706277U 1987-05-01

Publications (4)

Publication Number Publication Date
EP0288915A2 EP0288915A2 (fr) 1988-11-02
EP0288915A3 EP0288915A3 (en) 1989-01-04
EP0288915B1 EP0288915B1 (fr) 1994-06-22
EP0288915B2 true EP0288915B2 (fr) 1998-11-11

Family

ID=6807587

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88106444A Expired - Lifetime EP0288915B2 (fr) 1987-05-01 1988-04-22 Radiateur à rayonnement électrique pour chauffer une plaque, en particulier une plaque vitrocéramique

Country Status (7)

Country Link
US (1) US4845340A (fr)
EP (1) EP0288915B2 (fr)
JP (1) JP2700463B2 (fr)
AT (1) ATE107831T1 (fr)
DE (2) DE8706277U1 (fr)
ES (1) ES2054727T5 (fr)
YU (1) YU46335B (fr)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5177339A (en) * 1988-05-27 1993-01-05 Ceramaspeed Limited Radiant electric heaters
ATE163828T1 (de) * 1988-05-27 1998-03-15 Ceramaspeed Ltd Elektrische strahlungsheizgeräte
DE3828192A1 (de) * 1988-08-19 1990-02-22 Ego Elektro Blanc & Fischer Strahlheizkoerper sowie verfahren und vorrichtung zu seiner herstellung
CA2007729A1 (fr) * 1989-02-17 1990-08-17 Emil R. Plasko Dispositif de command/regulation pour element chauffant
US5128516A (en) * 1989-02-17 1992-07-07 Therm-O-Disc, Incorporated Heating element control
DE8914611U1 (fr) * 1989-12-12 1990-02-01 Bosch-Siemens Hausgeraete Gmbh, 8000 Muenchen, De
DE4022292A1 (de) * 1990-07-15 1992-01-16 Ego Elektro Blanc & Fischer Elektrisches strahlungsheizelement
DE4109569A1 (de) * 1991-03-22 1992-09-24 Buchtal Gmbh Elektrische heizplatte
DE9108013U1 (fr) * 1991-06-28 1991-09-05 Bosch-Siemens Hausgeraete Gmbh, 8000 Muenchen, De
DE9108012U1 (fr) * 1991-06-28 1991-09-05 Bosch-Siemens Hausgeraete Gmbh, 8000 Muenchen, De
GB2260442B (en) * 1991-10-09 1995-06-07 Ceramaspeed Ltd Radiant heater incorporating a temperature control device
DE9113992U1 (fr) * 1991-11-12 1992-01-02 E.G.O. Elektro-Geraete Blanc U. Fischer, 7519 Oberderdingen, De
US5796075A (en) * 1992-03-09 1998-08-18 E.G.O. Elektro-Gerate Blanc Und Fisher Gmbh & Co. Kg Heater, particularly for kitchen appliances
US5256860A (en) * 1993-01-22 1993-10-26 Therm-O-Disc, Incorporated Control for glass cooktops utilizing rod-shaped thermistor
GB2278237B (en) * 1993-05-21 1996-09-04 Ceramaspeed Ltd Thermal cut-out device
DE19846512A1 (de) * 1998-10-09 2000-04-13 Ego Elektro Geraetebau Gmbh Einbau eines Gehäuses einer Schalteinrichtung
DE10006954A1 (de) * 2000-02-16 2001-10-11 Bsh Bosch Siemens Hausgeraete Kochfeld mit Temperaturfühler
EP1187512B1 (fr) * 2000-09-07 2004-11-10 E.G.O. ELEKTRO-GERÄTEBAU GmbH Corps de chauffe à rayonnement destiné à être placé sous une plaque de cuisson, en particulier une plaque vitro-céramique
GB2372190B (en) * 2000-12-16 2005-02-09 Ceramaspeed Ltd Cooking appliance with radiant electric heater
EP1303169A1 (fr) * 2001-10-15 2003-04-16 Heraeus Sensor-Nite GmbH Capteur de température utilisant un élément sensible ainsi que son utilisation
GB0301164D0 (en) * 2003-01-18 2003-02-19 Ceramaspeed Ltd Temperature-responsive device
GB0616353D0 (en) * 2006-08-17 2006-09-27 Ceramaspeed Ltd Radiant electric heater
TW201227761A (en) 2010-12-28 2012-07-01 Du Pont Improved thick film resistive heater compositions comprising ag & ruo2, and methods of making same
JP6336205B2 (ja) * 2015-10-12 2018-06-06 コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． 温度センサ付きブレンダ
US11448402B2 (en) 2016-12-07 2022-09-20 Eika S. Coop Radiant electric heater

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3710076A (en) * 1972-02-17 1973-01-09 J Frazier Radiant surface-heater and temperature sensing assembly
SE7806238L (sv) * 1977-07-02 1979-01-03 Fischer Karl Elektriskt stralningsvermeelement, serskilt for glaskeramikkokhell
GR69904B (fr) * 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 (de) * 1980-02-26 1981-09-03 Ego Elektro Blanc & Fischer Glaskeramik-kochgeraet
DE3143692A1 (de) * 1981-11-04 1983-05-11 Ego Elektro Blanc & Fischer Strahlheizkoerper zur beheizung von koch- und waermeflaechen
US4508961A (en) * 1982-03-02 1985-04-02 Micropore International Limited Electric radiant heater units for glass ceramic top cookers
DE3302489A1 (de) * 1983-01-26 1984-07-26 Ego Elektro Blanc & Fischer Elektrischer strahlheizkoerper zur beheizung von koch- oder waermeplatten, insbesondere glaskeramikplatten
GB8324271D0 (en) * 1983-09-10 1983-10-12 Micropore International Ltd Thermal cut-out device
DE3410442A1 (de) * 1983-09-17 1985-09-26 Ego Elektro Blanc & Fischer Temperaturfuehler, insbesondere fuer einen temperaturbegrenzer fuer eine glaskeramik-kocheinheit
DE3519035A1 (de) * 1985-05-25 1986-11-27 E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen Elektro-kochplatte
DE8515560U1 (de) * 1985-05-25 1985-08-29 E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen Kochstellen-Beheizung

Also Published As

Publication number Publication date
ATE107831T1 (de) 1994-07-15
US4845340A (en) 1989-07-04
JP2700463B2 (ja) 1998-01-21
EP0288915A3 (en) 1989-01-04
ES2054727T5 (es) 1999-02-01
EP0288915A2 (fr) 1988-11-02
YU46335B (sh) 1993-05-28
JPS63284788A (ja) 1988-11-22
DE3850297D1 (de) 1994-07-28
EP0288915B1 (fr) 1994-06-22
ES2054727T3 (es) 1994-08-16
YU87388A (en) 1990-08-31
DE8706277U1 (fr) 1987-06-25

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