EP1368993A1 - Ceramic cooking system with glass ceramic plate, insulation layer and heating elements - Google Patents
Ceramic cooking system with glass ceramic plate, insulation layer and heating elementsInfo
- Publication number
- EP1368993A1 EP1368993A1 EP02722143A EP02722143A EP1368993A1 EP 1368993 A1 EP1368993 A1 EP 1368993A1 EP 02722143 A EP02722143 A EP 02722143A EP 02722143 A EP02722143 A EP 02722143A EP 1368993 A1 EP1368993 A1 EP 1368993A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ceramic plate
- glass ceramic
- cooking system
- insulation layer
- structural elements
- 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.)
- Granted
Links
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
-
- 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
Definitions
- the invention relates to a ceramic cooking system with a glass ceramic plate, which carries on its underside an insulation layer with heating elements for direct heating of the glass ceramic plate.
- These ceramic cooking systems with direct heating of the glass ceramic plate are characterized by high parboiling performance and have advantages over heating by means of radiant heaters in terms of efficiency and design options.
- Ceramic cooking systems consist of a flat glass ceramic plate, on the top of which the cooking vessel to be heated is placed.
- the glass ceramic plates include oxidic and non-oxidic ceramics, such as WO
- an insulation layer for electrical insulation is applied between the glass ceramic plate and the heating elements. Substances with high electrical are suitable as material for this insulation layer
- Insulation value especially AL 2 O 3 - SiO 2 - MgO material systems with materials such as corundum, mullite, periclase, spinel and cordierite as well as ZrO 2
- the heating elements are applied to the insulation layer.
- Thin layers can be provided over the entire surface as heating elements by sputtering or in the CVD process, SnO 2 in particular being used, as WO 00/18189 shows.
- Another possibility is to apply thick-film conductor tracks made of silver-palladium alloys using the screen printing method, as is known from EP 0 861
- the underside of the glass ceramic plate has a fine structure with structural elements that have a length between 10 and 250 ⁇ m and a height between 1 and 100 ⁇ m and at least partially undercuts form for interlocking with the insulation layer.
- the fine structure is superimposed on a grid-shaped knob structure, which is chosen for reasons of better dimensional stability of the glass ceramic plate.
- the improvement in adhesion can be achieved both in that the structural elements of the fine structure are formed in one piece with the glass ceramic plate and in that the fine structure is formed by separate structural elements applied to the glass ceramic plate. It is provided in the latter case that the structural elements consist of ceramic powder, such as AL 2 O 3 , SiO 2 , MgO, spinel, which is optionally mixed with metal oxide additives, such as Ti0 2 and alkalis, such as Na, and that Structural elements have spheroidal, angular and irregular shapes.
- the length of the structural elements is preferably chosen between 40 and 100 ⁇ m and the height between 20 and 60 ⁇ m.
- Fig. 2 shows a cooking system in which the fine structure is formed on the underside of the glass ceramic plate by applied structural elements
- Fig. 3 shows a cooking system in which the fine structure of a knob structure is superimposed on the underside of the glass ceramic plate.
- FIG. 1 shows a schematic partial section of a ceramic cooking system, the dimensions of which do not correspond to the actual circumstances but only serve to explain the invention.
- the glass ceramic plate 10 still has a flat top for setting up the cooking vessel.
- the underside 11 is, however, provided with a fine structure 12, which is formed by structural elements 13, which are produced by elevations and / or depressions of the surface plane.
- These structural elements 13 have a length L parallel to the top of the glass ceramic plate 10 and a height H perpendicular thereto.
- the length L applies in all directions and the height H applies to both depressions and elevations.
- the structural elements 1 3 have different shapes and at least partially form undercuts so that the applied insulation layer 20 can interlock with the fine structure 12 and thus the glass ceramic plate 10. That facing away from the glass ceramic plate 10
- the underside of the insulation layer 20 carries the heating element or elements which are formed by applied thick-layer conductor tracks 30.
- the fine structure 1 2 can also be formed by separate structural elements 13, which are applied to the flat underside 11 of the glass ceramic plate 10.
- irregular shapes are used for the structural elements 13, which allow partial interlocking between the insulation layer 20 and the fine structure 12 and thus glass-ceramic plate 10.
- the fine structure 12 can also be superimposed on the underside 11 of a glass ceramic plate 10 provided with a grid-like knob structure 15. Separate structural elements 13 are used in the exemplary embodiment shown.
- the knob structure 15 is made in one piece with the glass ceramic plate 10.
- the shapes of the structural elements 13 can be of any type and can be spheroidal, angular and irregular.
- ceramic powders such as AL 2 O 3 , SiO 2 , MgO and spinel are preferred, which are mixed with metal oxide additives such as TiO 2 and alkalis such as Na.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Electric Stoves And Ranges (AREA)
- Resistance Heating (AREA)
- Cookers (AREA)
- Surface Heating Bodies (AREA)
- Baking, Grill, Roasting (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10110793A DE10110793A1 (en) | 2001-03-06 | 2001-03-06 | Ceramic cooking system with glass ceramic plate, insulation layer and heating elements |
DE10110793 | 2001-03-06 | ||
PCT/EP2002/002062 WO2002078398A1 (en) | 2001-03-06 | 2002-02-27 | Ceramic cooking system with glass ceramic plate, insulation layer and heating elements |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1368993A1 true EP1368993A1 (en) | 2003-12-10 |
EP1368993B1 EP1368993B1 (en) | 2004-12-15 |
Family
ID=7676508
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02722143A Expired - Lifetime EP1368993B1 (en) | 2001-03-06 | 2002-02-27 | Ceramic cooking system with glass ceramic plate, insulation layer and heating elements |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1368993B1 (en) |
CN (1) | CN1493172A (en) |
AT (1) | ATE285164T1 (en) |
CA (1) | CA2439602A1 (en) |
DE (2) | DE10110793A1 (en) |
ES (1) | ES2233810T3 (en) |
WO (1) | WO2002078398A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10258727A1 (en) * | 2002-12-05 | 2004-06-24 | Schott Glas | oven |
ES2397573B1 (en) * | 2010-12-13 | 2014-01-20 | BSH Electrodomésticos España S.A. | Cooking Field Plate |
ES2399732B1 (en) * | 2010-12-13 | 2014-02-05 | BSH Electrodomésticos España S.A. | Home Appliance Device |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3806699C2 (en) * | 1988-03-02 | 1997-10-02 | Ptg Plasma Oberflaechentech | Process for coating household items and household items |
DE3812910A1 (en) * | 1988-04-18 | 1989-10-26 | Hanseatische Praezisions Und O | Ceramic composite material and process for the production thereof |
FR2744116B3 (en) * | 1996-01-31 | 1998-03-13 | Eurokera | SUBSTRATE FOR FITTING A COOKING AND / OR TEMPERATURE HOLDING DEVICE |
BE1010927A4 (en) * | 1997-02-14 | 1999-03-02 | Lizen Christian | Hot plate, especially hob ceramic material and method of making the same. |
US6037572A (en) * | 1997-02-26 | 2000-03-14 | White Consolidated Industries, Inc. | Thin film heating assemblies |
WO2000015005A1 (en) * | 1998-09-03 | 2000-03-16 | Aktiebolaget Electrolux | An insulated thin film heater |
DE19906963C1 (en) * | 1999-02-19 | 2000-06-15 | Schott Glas | Glass ceramic plate, has knobbly structure on underside consisting of regular pattern of knobs with defined interval between them |
-
2001
- 2001-03-06 DE DE10110793A patent/DE10110793A1/en not_active Ceased
-
2002
- 2002-02-27 CN CNA028053478A patent/CN1493172A/en active Pending
- 2002-02-27 EP EP02722143A patent/EP1368993B1/en not_active Expired - Lifetime
- 2002-02-27 WO PCT/EP2002/002062 patent/WO2002078398A1/en not_active Application Discontinuation
- 2002-02-27 CA CA002439602A patent/CA2439602A1/en not_active Abandoned
- 2002-02-27 DE DE50201781T patent/DE50201781D1/en not_active Expired - Fee Related
- 2002-02-27 ES ES02722143T patent/ES2233810T3/en not_active Expired - Lifetime
- 2002-02-27 AT AT02722143T patent/ATE285164T1/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO02078398A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2002078398A1 (en) | 2002-10-03 |
ES2233810T3 (en) | 2005-06-16 |
EP1368993B1 (en) | 2004-12-15 |
DE50201781D1 (en) | 2005-01-20 |
ATE285164T1 (en) | 2005-01-15 |
CN1493172A (en) | 2004-04-28 |
DE10110793A1 (en) | 2002-10-02 |
CA2439602A1 (en) | 2002-10-03 |
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