EP0639743A2 - Table de cuisson - Google Patents

Table de cuisson Download PDF

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Publication number
EP0639743A2
EP0639743A2 EP94112654A EP94112654A EP0639743A2 EP 0639743 A2 EP0639743 A2 EP 0639743A2 EP 94112654 A EP94112654 A EP 94112654A EP 94112654 A EP94112654 A EP 94112654A EP 0639743 A2 EP0639743 A2 EP 0639743A2
Authority
EP
European Patent Office
Prior art keywords
sensor
support plate
cover layer
cooking zone
hob according
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
Application number
EP94112654A
Other languages
German (de)
English (en)
Other versions
EP0639743A3 (fr
EP0639743B1 (fr
Inventor
Henry Dipl.-Ing. Karlheinz
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.)
BSH Hausgeraete GmbH
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0639743A2 publication Critical patent/EP0639743A2/fr
Publication of EP0639743A3 publication Critical patent/EP0639743A3/fr
Application granted granted Critical
Publication of EP0639743B1 publication Critical patent/EP0639743B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/10—Tops, e.g. hot plates; Rings
    • F24C15/102—Tops, e.g. hot plates; Rings electrically heated
    • F24C15/105—Constructive details concerning the regulation of the temperature
    • 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
    • H05B3/746—Protection, e.g. overheat cutoff, hot plate indicator
    • 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
    • H05B2213/05—Heating plates with pan detection means

Definitions

  • the invention relates to a hob with a support plate made of glass or glass-ceramic material, on the top of which at least one sensor is applied.
  • DE-A-38 37 096 provides for a sensor for direct measurement of the cookware temperature, that is to say an arrangement of the sensor on the top of the glass ceramic cooktop.
  • a sensor for direct measurement of the cookware temperature that is to say an arrangement of the sensor on the top of the glass ceramic cooktop.
  • it is not advisable to implement this idea because it increases costs, complicates the manufacturing process and, at least to some extent, due to the protrusion of the sensor over the hob
  • the extent of the advantages with regard to the appearance and the possibility of cleaning the otherwise smooth hob surface would be rendered obsolete.
  • DE-C-32 29 380 describes a radiant heater for electric cookers with glass ceramic cover plates, two sensors, namely a temperature sensor and a metal plate for determining the extent of the curvature of curved cookware, being located in the area of the cooking zone on the underside of the cover plate .
  • DE-GM-88 01 334.0 describes glass ceramic hobs in which the decor printed on the top of glass ceramic plates can withstand extreme mechanical stresses and remains perfectly visible because it is arranged in recesses in the shelf.
  • the disadvantage of the prior art is that, in contrast to the decor, sensors have hitherto been arranged only on the underside of glass ceramic plates and, as a result, can only indirectly measure measured variables relating to the cookware.
  • the arrangement of conductive sensors on the underside of the support plate also increases the risk of an electrical flashover from the heating coil to the sensor, which can lead to dangerous operating states of the domestic appliance.
  • the object of the present invention is therefore to enable a direct sensing of measured variables on the top of the glass ceramic plate by means of a sensor system, while overcoming the disadvantages inherent in the sensors above.
  • a cover layer covers the at least one sensor.
  • the application of the sensor itself to the top does not differ from the application of the sensor to the bottom, so that the costs and the manufacturing process are identical in this regard.
  • connection lines are assigned to the sensors and these are also covered.
  • sensors and connecting lines are applied to the bottom of at least one recess machined into the upper side of the support plate, the cover layer filling the recess not protruding from the upper side of the support plate. So sensors and connecting cables are also able to cope with extreme loads and the hob still has all the advantages with regard to the appearance and the cleaning options of the glass ceramic hob.
  • the sensors are advantageously applied in a surface area within this cooking zone in order to detect measured variables related to a specific cooking zone or the cookware placed there.
  • a temperature sensor is spatially assigned to a surface area outside the cooking zone in order to be able to measure its residual heat.
  • the production process is advantageously simplified by the identity of a first opaque cover layer material and the material of the decorative coating.
  • the same purpose is used in a further preferred exemplary embodiment to replace the decorative coating with a first cover layer.
  • the sensors are covered with the covering layer over a large area and not based on the linear design of a sensor.
  • a transparent second cover layer is expediently used by means of the first cover layer, so that the geometrical arrangement of the sensors below the cover layer remains recognizable.
  • the connecting lines of the sensors are routed to the edge of the support plate, which is covered by a frame surrounding the support plate, and from there are conductively connected to control electronics located below the support plate.
  • FIG. 1 which is not to scale, shows the hob with a support plate 1 made of glass-ceramic material, which is bordered by a slightly raised frame 2. Below the support plate 1 are several, not shown, e.g. electric radiators arranged. Corresponding cooking zones 3a, 3b, 3c, 3d are assigned to these on the upper side of the support plate 1.
  • the cooking zones 3a, 3b, 3c, 3d receive geometrically assigned devices as reference numerals, an Arabic number and a lowercase letter a, b, c, d.
  • the reference number stands for the type of device, for example 7 for sensor.
  • the device is assigned to the respective cooking zone 3a, 3b, 3c, 3d by means of the letters a, b, c or d below.
  • a first cover layer 5a which consists of the same material, are on the upper side or footprint of the day plate 1 like the decorative coatings 4b, 4d and a first cover layer 5c or a second transparent cover layer 6b made of ceramic material.
  • the cover layers 5a, 5c, 6b or further first cover layers 5b, 5b ', 5d which consist of the same material as the decorative coatings 4b, 4d, also cover the sensors 7a, 7b, 7b', 7c, 7d and their connecting lines 8a, 8b, 8b ', 8c, 8d.
  • the materials of the decorative coating 4b, 4d and the first cover layer 5a, 5b, 5b ', 5d can also be different. Furthermore, it is possible to provide the transparent second cover layer 6b with a matting, for example, and thus to close the cooking zone 3b mark and do without the decorative coating 4b.
  • Each of the cover layers 5a, 5b, 5b ', 5c, 5d, 6b can also be multi-layered.
  • the sensors 7a, 7b, 7b ', 7c, 7d are applied using thick-film technology, as are their connecting lines 8a, 8b, 8b', 8c, 8d. It is also possible to implement the sensors and connecting lines using thin-film technology, if this is advantageous.
  • the connecting lines can expediently consist of a noble metal.
  • connection points 8, 8b, 8b ', 8c, 8d lead to connection points, not shown, on the upper side of the support plate 1, which are covered by the frame 2. From there, they are conductively connected to control electronics located under the support plate 1 via edge connectors (not shown). The connection of the sensor and the control electronics can optionally also be realized capacitively or inductively. At least one through hole in the support plate 1 for the passage of electrical lines is also conceivable.
  • the temperature sensor 7a is applied to the top of the support plate 1, which detects overheated points on the edge of the cooking zone 3a via the temperature dependence of the glass ceramic hob material.
  • the temperature sensor 7c is realized in a known double spiral shape (DE-PS 40 22 845 C2). This extends over the entire cooking zone 3c and therefore covers almost every overheated point in the cooking zone, but also covers a large proportion of the total area of the cooking zone 3c.
  • the sensors 7a, 7b, 7b ', and 7c are each an area within the cooking zones 3a, 3b and 3c assigned.
  • the thermistor 7d is assigned to an area outside the cooking zone 3d in order to detect its residual heat.
  • the selection of the measured variables is not limited to the named ones, but further information, for example the presence of liquid on the support plate 1 or the presence of cookware on a cooking zone, can be recorded if this is expedient.
  • FIG. 2 shows the sensors (7a, 7c) arranged on the upper side of the support plate 1, the connecting lines (8d), the decorative coating (4b) and the first and second cover layers (5a, 5c, 5d, 6b). shown.
  • the temperature sensor 7a is covered with the first cover layer 5a.
  • the cover layer 5a is only applied to the sensor tracks themselves and not in the spaces between them (see FIG. 3A).
  • the temperature dependence of the sensor 7a is therefore independent of the properties of the ceramic cover layer 5a.
  • the cover layer 5a replaces the decorative coating of the cooking zone 3a.
  • a recess 9b is formed in the cooking zone 3b, which is characterized by the printed circular decorative coating 4b, and is filled with the second cover layer 6b.
  • This is transparent so that the position of the two sensors 7b and 7b 'formed on the bottom of the recess 9b remains visible, as can be seen in FIG. 1.
  • the operator is thus able to use the point-measuring sensors 7b and 7b 'correctly. It may be advantageous to extend the area of the depression 9b and the to limit the second cover layer 6b to the areal expansions of the sensors 7b, 7b 'and their connecting lines 8b, 8b'.
  • the spiral-shaped temperature sensor 7c is applied to the bottom of a depression 9c in the cooking zone 3c.
  • the recess 9c is filled with the first cover layer 5c, which replaces the decorative coating of the cooking zone 3c.
  • the depression 9c itself can also be formed in a double spiral shape in accordance with the linear configuration of the sensor 7c in the support plate 1.
  • the connecting lines 8d of the temperature sensor 7d are applied to the bottom of a recess 9d.
  • the recess 9d is suitably shaped by laser beams, but can also be machined, for example, or etched into the support plate 1. Two depressions can also be formed for the two connecting lines 8d.
  • the transition from the first cover layer 5d, which fills the recess 9d, to the surface of the glass ceramic plate 1 is realized in a stepless manner (see FIG. 3B).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Electric Stoves And Ranges (AREA)
  • Induction Heating Cooking Devices (AREA)
  • Surface Treatment Of Glass (AREA)
  • Cookers (AREA)
  • Baking, Grill, Roasting (AREA)
  • Surgical Instruments (AREA)
EP94112654A 1993-08-18 1994-08-12 Table de cuisson Expired - Lifetime EP0639743B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9312369U 1993-08-18
DE9312369U DE9312369U1 (de) 1993-08-18 1993-08-18 Kochfeld

Publications (3)

Publication Number Publication Date
EP0639743A2 true EP0639743A2 (fr) 1995-02-22
EP0639743A3 EP0639743A3 (fr) 1998-11-25
EP0639743B1 EP0639743B1 (fr) 2001-05-30

Family

ID=6896932

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94112654A Expired - Lifetime EP0639743B1 (fr) 1993-08-18 1994-08-12 Table de cuisson

Country Status (2)

Country Link
EP (1) EP0639743B1 (fr)
DE (2) DE9312369U1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000077481A1 (fr) * 1999-06-10 2000-12-21 BSH Bosch und Siemens Hausgeräte GmbH Champ de cuisson pourvu d'une unite de pesage
WO2008110447A2 (fr) * 2007-03-13 2008-09-18 BSH Bosch und Siemens Hausgeräte GmbH Table de cuisson dotée d'une zone de détection de température

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021107B1 (fr) * 1979-06-13 1983-03-30 E.G.O. Elektro-Geräte Blanc u. Fischer Elément chauffant par rayonnement pour une unité de cuisson, muni d'un détecteur de température
DE4022845A1 (de) * 1990-07-18 1992-01-23 Schott Glaswerke Temperatursensor oder -sensoranordnung aus glaskeramik und kontaktierenden filmwiderstaenden
EP0522345A1 (fr) * 1991-06-28 1993-01-13 Bosch-Siemens Hausgeräte GmbH Isolation de tension de réseau avec détecteurs au-dessous de plaques chauffantes vitrocéramiques.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3002623A1 (de) * 1980-01-25 1981-07-30 Neff - Werke Carl Neff GmbH, 7518 Bretten Einbau-kochfeld
DE3209260A1 (de) * 1982-03-13 1983-09-22 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Kochfeld aus glaskermaischem material
DE3934157C2 (de) * 1989-10-12 1999-01-28 Bosch Siemens Hausgeraete Kochmulde
GB2249386B (en) * 1990-10-22 1994-03-30 Moorwood Vulcan Ltd Cooker hobs

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021107B1 (fr) * 1979-06-13 1983-03-30 E.G.O. Elektro-Geräte Blanc u. Fischer Elément chauffant par rayonnement pour une unité de cuisson, muni d'un détecteur de température
DE4022845A1 (de) * 1990-07-18 1992-01-23 Schott Glaswerke Temperatursensor oder -sensoranordnung aus glaskeramik und kontaktierenden filmwiderstaenden
EP0522345A1 (fr) * 1991-06-28 1993-01-13 Bosch-Siemens Hausgeräte GmbH Isolation de tension de réseau avec détecteurs au-dessous de plaques chauffantes vitrocéramiques.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000077481A1 (fr) * 1999-06-10 2000-12-21 BSH Bosch und Siemens Hausgeräte GmbH Champ de cuisson pourvu d'une unite de pesage
US6541742B2 (en) 1999-06-10 2003-04-01 BSH Bosch und Siemens Hausgeräte GmbH Cooktop with weighing unit
WO2008110447A2 (fr) * 2007-03-13 2008-09-18 BSH Bosch und Siemens Hausgeräte GmbH Table de cuisson dotée d'une zone de détection de température
WO2008110447A3 (fr) * 2007-03-13 2009-03-26 Bsh Bosch Siemens Hausgeraete Table de cuisson dotée d'une zone de détection de température

Also Published As

Publication number Publication date
EP0639743A3 (fr) 1998-11-25
DE9312369U1 (de) 1994-12-15
EP0639743B1 (fr) 2001-05-30
DE59409763D1 (de) 2001-07-05

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