EP1006755A2 - Plaque de cuisson électrique - Google Patents

Plaque de cuisson électrique Download PDF

Info

Publication number
EP1006755A2
EP1006755A2 EP99122793A EP99122793A EP1006755A2 EP 1006755 A2 EP1006755 A2 EP 1006755A2 EP 99122793 A EP99122793 A EP 99122793A EP 99122793 A EP99122793 A EP 99122793A EP 1006755 A2 EP1006755 A2 EP 1006755A2
Authority
EP
European Patent Office
Prior art keywords
hotplate
heating conductor
hob according
heating
underside
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.)
Withdrawn
Application number
EP99122793A
Other languages
German (de)
English (en)
Other versions
EP1006755A3 (fr
Inventor
Albert Dr. Kerber
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.)
SiCeram GmbH
Original Assignee
SiCeram 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 SiCeram GmbH filed Critical SiCeram GmbH
Publication of EP1006755A2 publication Critical patent/EP1006755A2/fr
Publication of EP1006755A3 publication Critical patent/EP1006755A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • 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

Definitions

  • the invention relates to an electric cooktop for the low-voltage range a hotplate made of high-performance ceramics and with a heater that matches the Underside of the hotplate forms a surface contact.
  • the coefficient of thermal expansion of such high-performance ceramics is very low and is in the range of 10 -6 1 / K, so that the tensions and curvatures of the hotplate remain low due to different heating.
  • the installed power per unit area for high-performance ceramics can be in the range of other high-performance hot plates between 4 and 16 W / cm 2 .
  • the specific electrical resistance of some high-performance ceramics is in the range of 10 13 ohm / cm and is so high that appropriate electrical heating conductors can be applied directly to the underside of the hotplate.
  • the object of the invention is therefore an electric cooktop for the low voltage range to create, which ensures that the electrical supply lines do not overheat.
  • the invention Solution is that between the heating conductor and the electrical Supply lines each have at least one line element interposed that has a resistance value that is between the resistance values of the heating conductor and the respective electrical supply line.
  • the invention is based on the knowledge that through the intermediary a further line element between the heating conductor and the respective electrical supply line a compromise between heat dissipation found by the heat conductor and the heating of the respective line element can be. If an electrical supply line is connected directly to the heating conductor, So is the heating of the supply line due to the large Currents not to be feared, but heating occurs on the part of the heating conductor due to the good thermal conductivity of the electrical supply line.
  • both the heat dissipation via the line element to the heating conductor as well as the heating of the line element are limited due to the large currents.
  • the line element consists of a piece of the heating conductor, which is from the bottom of the hotplate is led away and has a larger cross section than that in surface contact heating conductor standing with the hotplate. This ensures that no additional contact resistance between the line element and the heating conductor occurs.
  • a particularly inexpensive training of the Line element possible because the line element is already available standing material of the heat conductor can be formed.
  • excessive heating of the line element has already been avoided can be if the cross section of the line element is four times larger than that of the heating conductor in surface contact with the hotplate.
  • a copper block is provided to which the respective line ends are applied flat.
  • the copper block can be a large-area contact to the line element or the respective electrical supply line are manufactured so that the Contact resistance from the line element to the copper block or from the Supply line to the copper block is reduced to a minimum.
  • the volume resistance of the copper block is also extremely low, so that heating due to the connection between the line element and the electrical supply line can be excluded.
  • the hotplate consists of silicon nitrite, silicon carbide or aluminum nitrite.
  • This Ceramics have the advantages of high performance ceramics mentioned above.
  • the inventive design of the intermediate line element is particularly simple if the heating conductor consists of a metal foil, which is pressed onto the underside of the hotplate by means of an insulating layer.
  • a meandering shape of the heat conductor can be formed by the heating conductor from a metal foil with a suitable cutting device, for example with a laser cutter. The corresponding line element can be fed to the heating conductor in one process be cut out.
  • heating conductor are resistance layers in thick film technology or thin film technology on the underside the hotplate.
  • Flame spraying methods can also be used with an intermediate layer from one as an adhesion promoter and / or electrical insulation material can be applied.
  • alumina can be sprayed on as electrical insulation what is particularly necessary if an electrically conductive high-performance ceramic such as silicon carbide is used.
  • the heating conductor in the form of a resistance paste on the underside of the hotplate.
  • resistance pastes or heating resistors with so-called PTC characteristics, d. H. with a distinctly positive temperature characteristic of your Resistance.
  • the PTC characteristic leads to the fact that when a certain Temperature the resistance of the respective heating resistor jumps increased so that in this area the temperature or that in the heating resistor implemented performance remains constant.
  • the corresponding one Jump temperature of the heating resistor to the maximum temperature of the Hot plate set.
  • an insulating layer is provided, which is pressed against the underside of the hotplate by means of a pressure plate becomes.
  • the insulation layer does not have to have its own mechanical stability have, so that a variety of insulation materials are used can.
  • Heat conductors are to be supplied in the insulation layer and the pressure plate Through holes are provided.
  • temperature sensors in Form of resistance thermometers in direct contact with the ceramic plate be provided to regulate the temperature on the ceramic plate. To this way, effective protection against overheating can also be created.
  • the one figure Drawing shows a cross section through the electrical according to the invention Cooktop for the low voltage range.
  • the hotplate 1 of the hob consists of a round silicon nitride disc.
  • the silicon nitride disc has on the outer edge a bevel 10 against a corresponding one Edge 11 of the housing wall 7 is pressed.
  • the hotplate 1 is held from the pressure surface 4, which is by means of screw 9 opposite the housing base 8 supports. Is located between the pressure plate 4 and the hot plate 1 there is an insulation layer 3.
  • To heat the hotplate between the Insulation layer and the hotplate a meandering heating conductor in the form of a Introduced metal foil.
  • the power supply is in the middle and at the edge of the Hotplate through holes 14, 15 through the insulation layer 3 and through the pressure plate 4 is provided, through which the line ends 12, 13 of the heating conductor are passed through.
  • the ends 12, 13 have a four times larger Cross-section compared to the cross-sections of the heating conductor 2 on
  • copper blocks 5, 6 are provided, which are a transition connection between the feeds 12, 13 and the electrical supply lines create.
  • the insulation layer 3 and the heating conductor 2 are the respective components drawn at appropriate distances from each other while in operation of course the individual components in a safe surface contact to stand by each other.
  • the electric hob shown is preferably with a DC voltage operated by 12V at a current of 80A.
  • the copper blocks 5, 6 ensure that the contact resistance between the electrical supply lines and the free ends of the feeds 12, 13 is negligible, so that on this No unwanted warming can occur.
  • the feeders 12, 13 have four times the cross-section compared to the actual heating conductor 2 on, so that based on the same line length in the leads only one Quarter of the power compared to a piece of heat conductor of equal length. This ensures that the feeds 12, 13 do not heat up undesirably. At the same time, the feeds 12, 13 are still sufficiently high Thermal resistance to overheat the copper blocks 5, 6 or the electrical To prevent supply line on the part of the heating conductor.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Resistance Heating (AREA)
  • Surface Heating Bodies (AREA)
  • Central Heating Systems (AREA)
EP99122793A 1998-12-01 1999-11-16 Plaque de cuisson électrique Withdrawn EP1006755A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19855481A DE19855481A1 (de) 1998-12-01 1998-12-01 Elektrisches Kochfeld
DE19855481 1998-12-01

Publications (2)

Publication Number Publication Date
EP1006755A2 true EP1006755A2 (fr) 2000-06-07
EP1006755A3 EP1006755A3 (fr) 2002-01-23

Family

ID=7889669

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99122793A Withdrawn EP1006755A3 (fr) 1998-12-01 1999-11-16 Plaque de cuisson électrique

Country Status (6)

Country Link
EP (1) EP1006755A3 (fr)
JP (1) JP2000188174A (fr)
KR (1) KR20000047736A (fr)
AU (1) AU5961999A (fr)
CA (1) CA2291381A1 (fr)
DE (1) DE19855481A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10059990A1 (de) * 2000-12-02 2002-07-04 Bosch Gmbh Robert Keramisches Heizmodul und damit hergestelltes keramisches Kochfeld
DE10112236C1 (de) * 2001-03-06 2002-10-24 Schott Glas Keramik-Kochfeld
DE10112235C2 (de) * 2001-03-06 2003-04-03 Schott Glas Keramik-Kochfeld
DE20117517U1 (de) 2001-10-25 2002-02-21 Rauschert Gmbh & Co. Kg, 96332 Pressig Mobiles Universalkochgerät

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3105065A1 (de) * 1981-02-12 1982-08-19 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Kochplatte aus glaskeramik
FR2623684A1 (fr) * 1987-11-24 1989-05-26 Labo Electronique Physique Element chauffant en vitroceramique
US5221829A (en) * 1990-10-15 1993-06-22 Shimon Yahav Domestic cooking apparatus
DE29702813U1 (de) * 1997-01-10 1997-05-22 E.G.O. Elektro-Gerätebau Gmbh, 75038 Oberderdingen Kontaktwärmeübertragendes Kochsystem mit einer Elektro-Kochplatte
GB2322273B (en) * 1997-02-17 2001-05-30 Strix Ltd Electric heaters

Also Published As

Publication number Publication date
JP2000188174A (ja) 2000-07-04
AU5961999A (en) 2001-06-21
DE19855481A1 (de) 2000-06-08
EP1006755A3 (fr) 2002-01-23
KR20000047736A (ko) 2000-07-25
CA2291381A1 (fr) 2000-06-01

Similar Documents

Publication Publication Date Title
EP0250880B1 (fr) Corps de chauffage à rayonnement
DE4022846C2 (de) Vorrichtung zur Leistungssteuerung und -begrenzung bei einer Heizfläche aus Glaskeramik oder einem vergleichbaren Material
DE3854498T2 (de) Elektrische Einrichtung mit einem Widerstandselement aus PTC-Polymer.
DE2903442C2 (fr)
DE69732321T2 (de) Hocheffiziente Induktionskochstelle
EP0069298B1 (fr) Plaque chauffante
EP1318694A1 (fr) Dispositif de chauffage électrique
DE1615273A1 (de) Elektrisch beheizte Vorrichtung zur Erwaermung des menschlichen Koerpers
EP2134143A1 (fr) Elément de chauffe de résistance électrique pour un dispositif de chauffage destiné à chauffer un milieu gazeux s'écoulant
DE3004187A1 (de) Strahlungsheizer fuer herde mit ebenen kochplatten
DD253137A5 (de) Glaskeramik-kochfeld mit heizkoerpern mit in der anheizphase schnell gluehenden heizleitern
DE3689830T2 (de) Temperaturempfindliche Einrichtung.
DE69931980T2 (de) Elektrischer Strahlungsheizkörper
EP1182914A2 (fr) Commande électronique d'un élément chauffant
CH653509A5 (de) Elektrischer strahlungsheizkoerper.
EP1006755A2 (fr) Plaque de cuisson électrique
DE1299089B (de) Heizeinheit fuer elektrisches Buegeleisen
EP1006320A2 (fr) Chauffe-eau instantané électrique et son procédé de fabrication
DE4040258C2 (de) Elektrische Heizeinheit mit PTC-Heizkörpern, insbesondere für Haarpflegegeräte
DE8400644U1 (de) Elektrisches heizelement, insbesondere fuer glatte kochflaechen
WO1991007068A1 (fr) Dispositif de chauffage autoregulateur
EP0793399B1 (fr) Elément de chauffage à autorégulation
DE2438476A1 (de) Temperaturkonstante heizeinrichtung
DE10310255A1 (de) Elektrische Heizung mit einer Kontaktkochplatte
DE69901406T2 (de) Durch Siebdruck hergestellte Heizvorrichtung und Verfahren zu deren Herstellung

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

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

RIC1 Information provided on ipc code assigned before grant

Free format text: 7H 05B 3/74 A, 7H 05B 3/26 B

AKX Designation fees paid

Free format text: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20020601