EP0639743B1 - Kochfeld - Google Patents
Kochfeld Download PDFInfo
- Publication number
- EP0639743B1 EP0639743B1 EP94112654A EP94112654A EP0639743B1 EP 0639743 B1 EP0639743 B1 EP 0639743B1 EP 94112654 A EP94112654 A EP 94112654A EP 94112654 A EP94112654 A EP 94112654A EP 0639743 B1 EP0639743 B1 EP 0639743B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sensor
- support plate
- cover layer
- cooking
- field 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.)
- Expired - Lifetime
Links
- 238000010411 cooking Methods 0.000 title claims description 38
- 238000000576 coating method Methods 0.000 claims description 13
- 239000011248 coating agent Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 7
- 239000006112 glass ceramic composition Substances 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 2
- 239000002241 glass-ceramic Substances 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
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 glass or glass-ceramic material existing support plate, on the At least one sensor is applied to the top.
- the output power is common each heating unit to control the glass ceramic To protect overheating. This is done on the bottom surface of the glass ceramic material with a corresponding temperature Sensor measured.
- This arrangement of the sensor proves turned out to be inconvenient, however, if due to the sensor supplied temperature information the output power of the Heating unit should be regulated to a user-selected To achieve cookware temperature and upright too receive.
- Other measurands, such as weight of a cookware or the detection of liquid the support plate are in the arrangement of the sensor on the lower Surface of the support plate cannot be measured.
- DE-A-38 37 096 provides for a sensor direct measurement of the cookware temperature, i.e. an arrangement the sensor on the top of the glass ceramic hob, taken into consideration. From a realization of this Idea is discouraged because it increases costs the manufacturing process made more complicated and by that The sensor protrudes beyond the hob at least to some extent Extent the benefits in terms of 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 described with glass ceramic cover plates, where in Area of the cooking zone on the underside of cover plate two Sensors, namely a temperature sensor and a metal plate to determine the extent of the curvature of curved cookware, are located.
- Glass ceramic cooktops are described in DE-GM-88 01 334.0. where that is on top of glass ceramic plates printed decor extreme mechanical stress therefore has grown and is perfectly visible remains because it is arranged in recesses in the footprint is.
- the disadvantage of the prior art is in that, in contrast to the decor, sensors have so far only been used the underside of glass ceramic plates are arranged and this means that measured variables relating to the cookware are only indirect can measure.
- sensors By arranging conductive sensors on the Underside of the support plate is also an electrical hazard Flashover from heating coil to sensor enlarged, resulting in dangerous operating conditions of the household appliance can lead.
- the object of the present invention is therefore to direct sensing of measured values on the top the glass-ceramic plate by means of a sensor technology while overcoming the disadvantages inherent in the sensors above to enable.
- This object is achieved in that a cover layer covering at least one sensor.
- the application of the sensor itself on the top differs not from attaching the sensor to the bottom, so that the costs and the manufacturing process are identical in this regard are.
- the sensors prefferably have connecting lines assigned and this also covered.
- the sensors are advantageously in a surface area applied within this cooking zone.
- a temperature sensor Spatially assigned area outside the cooking zone, to measure their residual heat.
- first opaque top layer material and the material of the decorative coating advantageously simplifies the manufacturing process.
- the the same purpose is used in a further preferred exemplary embodiment the replacement of the decorative coating with a first top layer.
- the sensors over a large area and not on the linear design a sensor oriented covered with the top layer. It is expedient to use the first cover layer a clear second top layer is used so the geometric arrangement of the sensors below the Top layer remains recognizable.
- the connecting lines are of the sensors to the edge of the support plate, the is covered by a frame surrounding the support plate, and from there with control electronics located below the support plate conductively connected.
- FIG. 1 which is not to scale, shows the cooktop with a Support plate 1 made of glass-ceramic material by a slightly raised frame 2 is bordered. Below the Support plate 1 are several, not shown, e.g. electric radiators arranged. These are on the top cooking zones 3a, 3b, 3c corresponding to support plate 1, 3d assigned.
- the cooking zones 3a, 3b, 3c, 3d get geometrical assigned devices as a reference number Arabic numeral and a lowercase letter a, b, c, d. there the reference number stands for the type of device, for example 7 for sensor.
- the assignment of the device to the respective cooking zone 3a, 3b, 3c, 3d takes place via the trailing letters a, b, c or d.
- Cooking zones 3a, 3b, 3c, 3d are on the top or footprint of the support plate 1 decorative coatings 4b, 4d of ceramic material in the form of circular or oval lines, a first cover layer 5a made from the same Material consists of the decorative coatings 4b, 4d and one first cover layer 5c or a second transparent Cover layer 6b applied from ceramic material.
- the Cover layers 5a, 5c, 6b or further first cover layers 5b, 5b ', 5d, which consist of the same material as that 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 may also be different. It is also possible the transparent second cover layer 6b e.g. with a To provide matting and thus 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 multilayered.
- the sensors 7a, 7b, 7b ', 7c, 7d are in thick-film technology applied as well as their connecting lines 8a, 8b, 8b ', 8c, 8d. It is also a realization of the sensors and connection lines possible in thin film technology if this is advantageous.
- the connecting lines can expediently consist of a precious metal.
- connection lines 8, 8b, 8b ', 8c, 8d do not lead to connection points shown on the top of the support plate 1, which are covered by the frame 2. From there are them with control electronics located under the support plate 1 conductive via edge connector (not shown) connected. The connection of sensor and control electronics can also be implemented capacitively or inductively if necessary his. Also at least one through hole in the support plate 1 for carrying out electrical lines is conceivable.
- the temperature sensor 7a is on the Top of the support plate 1 applied, the temperature dependence of the ceramic hob material overheated Locations on the edge of the cooking zone 3a detected.
- the thermistor 7b In the cooking zone 3b are the thermistor 7b and the piezoelectric weight sensor 7b 'and in the cooking zone 3c is the temperature sensor 7c in known double spiral form (DE-PS 40 22 845 C2) realized. This extends over the entire Cooking zone 3c and therefore covers almost every overheated area the cooking zone, but also covers a large proportion of the total area 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 an area outside the cooking zone 3d assigned to its residual heat capture.
- the selection of the measurands is not on the above-mentioned, but more information, e.g. the presence of liquid on the Support plate 1 or the presence of a cookware a cooking zone, if this is appropriate.
- the temperature sensor 7a is with the first cover layer 5a covered.
- the cover layer 5a is only on the sensor tracks themselves and not in between (see Fig. 3A).
- the temperature dependence of the sensor 7a is therefore independent of the properties of the ceramic Top layer 5a.
- the cover layer 5a replaces the decorative coating the cooking zone 3a.
- a recess 9b formed and with the second cover layer 6b replenished is transparent so that the position of the two sensors 7b formed on the bottom of the recess 9b and 7b 'remains visible, as can be seen in Fig. 1. So is the operator is able to use the point-measuring sensors 7b and 7b 'to use correctly. It can be beneficial the areal expansion of the recess 9b and second cover layer 6b on the areal expansions the sensors 7b, 7b 'and their connecting lines 8b, 8b' limit.
- the spiral temperature sensor 7c At the bottom of a recess 9c in the cooking zone 3c is the spiral temperature sensor 7c applied.
- the deepening 9c is filled with the first cover layer 5c, which the decorative coating of the cooking zone 3c replaced.
- the recess 9c itself can also only have a double spiral shape according to the linear design of the Sensor 7c be formed in the support plate 1.
- the connecting lines 8d of the temperature sensor 7d are on Bottom of a recess 9d applied.
- the recess 9d is suitably shaped by laser beams, but can, for example can also be done by machining or in the support plate be etched. There can also be two wells for the two connecting lines 8d are formed.
- the transition from the first cover layer 5d, which fills the depression 9d, is stepless to the surface of the glass ceramic plate 1 realized (see Fig. 3B).
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (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)
Description
- Fig. 1
- eine Draufsicht eines Ausführungsbeispiels des Kochfeldes,
- Fig. 2
- eine Querschnittsansicht, gemäß der Schnittlinie II-II in Fig. 1 und
- Fog. 3a und 3b
- vergrößert Darstellungen von Ausschnitten aus Fig. 2.
Claims (9)
- Kochfeld mit einer aus Glas oder glaskeramischem Material bestehenden Tragplatte (1), auf deren Oberseite mindestens ein Sensor (7a, 7b, 7b', 7c, 7d) aufgebracht ist, dadurch gekennzeichnet, daß jeweils eine Deckschicht (5a, 5c, 5d, 6b) den mindestens einen Sensor (7a, 7b, 7b', 7c, 7d) bedeckt, und daß die Deckschicht (5a, 5b, 5b', 5d) aus demselben Material besteht wie eine Dekorbeschichtung (4b, 4d) der Tragplatte (1).
- Kochfeld nach Anspruch 1, dadurch gekennzeichnet, daß jedem des mindestens einen Sensors (7a, 7b, 7b', 7c, 7d) Anschlußleitungen (8a, 8b, 8b', 8c, 8d) zugeordnet sind, die jeweils von der Deckschicht (5a, 5b, 5b', 5c, 5d, 6b) bedeckt sind.
- Kochfeld nach Anspruch 2, dadurch gekennzeichnet, daß der mindestens eine Sensor (7b, 7b', 7c, 7d) und die Anschlußleitungen (8b, 8b', 8c, 8d) in mindestens einer in die Oberseite der Tragplatte (1) eingearbeiteten Vertiefung (9b, 9c, 9d) aufgebracht sind, und daß die jeweils auf den mindestens einen Sensor (7b, 7b', 7c, 7d) und die Anschlußleitungen (8b, 8b', 8c, 8d) aufgebrachte Deckschicht (5b, 5b', 5c, 5d, 6b) nicht über die Oberfläche der Tragplatte (1) hervorsteht.
- Kochfeld nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der mindestens eine Sensor (7a, 7b, 7b', 7c) jeweils einem Flächenbereich innerhalb einer Kochzone (3a, 3b, 3c) geometrisch aufgebracht zugeordnet ist.
- Kochfeld nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß der mindestens eine Sensor (7d) jeweils einer Kochzone (3d) geometrisch zugeordnet ist, aber in einem Flächenbereich außerhalb der Kochzone (3d) aufgebracht ist.
- Kochfeld nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Deckschicht (5c, 6b) über die durch die linienmäßige Ausgestaltung des mindestens einen Sensors (7b, 7b', 7c) vorgegebenen Flächen hinaus Flächenbereiche auf der Tragplatte (1) bedeckt.
- Kochfeld nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß eine Mehrzahl der Deckschichten (5a, 5b, 5b', 5c, 5d, 6b) nebeneinander auf der Tragplatte (1) aufgebracht ist und diese wahlweise eine undurchsichtige erste Deckschicht (5a, 5b, 5b', 5c, 5d) oder eine durchsichtige zweite Deckschicht (6b) sind.
- Kochfeld nach Anspruch 4 in Verbindung mit Anspruch 7, dadurch gekennzeichnet, daß die erste Deckschicht (5a, 5c), die den dem Flächenbereich innerhalb der Kochzone (3a, 3c) zugeordneten Sensor (7a, 7c) bedeckt, die Dekorbeschichtung dieser Kochzone (3a, 3c) ersetzt.
- Kochfeld nach einem der Ansprüche 2 bis 8, dadurch gekennzeichnet, daß die Anschlußleitungen (8a, 8b, 8b', 8c, 8d) an den Rand der Tragplatte (1) bis in den Bereich eines die Tragplatte (1) umziehenden Rahmens (2) geführt sind und von dort mit einer unter der Tragplatte (1) liegenden Steuerelektronik leitend verbunden sind.
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 EP0639743A2 (de) | 1995-02-22 |
| EP0639743A3 EP0639743A3 (de) | 1998-11-25 |
| EP0639743B1 true EP0639743B1 (de) | 2001-05-30 |
Family
ID=6896932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94112654A Expired - Lifetime EP0639743B1 (de) | 1993-08-18 | 1994-08-12 | Kochfeld |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0639743B1 (de) |
| DE (2) | DE9312369U1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2321261A1 (es) * | 2007-03-13 | 2009-06-03 | Bsh Electrodosmeticos España S.A. | Campo de coccion con una zona de sensor de temperatura. |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19964217A1 (de) * | 1999-06-10 | 2001-05-17 | Bsh Bosch Siemens Hausgeraete | Kochfeld mit Wägeeinheit |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2923884C2 (de) * | 1979-06-13 | 1982-12-02 | E.G.O. Elektro-Geraete Blanc U. Fischer, 7519 Oberderdingen | Regeleinrichtung zur Ankopplung an Heizelemente für Glaskeramik-Kochflächen |
| 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 |
| DE4022845A1 (de) * | 1990-07-18 | 1992-01-23 | Schott Glaswerke | Temperatursensor oder -sensoranordnung aus glaskeramik und kontaktierenden filmwiderstaenden |
| GB2249386B (en) * | 1990-10-22 | 1994-03-30 | Moorwood Vulcan Ltd | Cooker hobs |
| DE9108013U1 (de) * | 1991-06-28 | 1991-09-05 | Bosch-Siemens Hausgeräte GmbH, 8000 München | Netzspannungsisolierung für Sensoren unter Glaskeramik-Kochflächen |
-
1993
- 1993-08-18 DE DE9312369U patent/DE9312369U1/de not_active Expired - Lifetime
-
1994
- 1994-08-12 DE DE59409763T patent/DE59409763D1/de not_active Expired - Fee Related
- 1994-08-12 EP EP94112654A patent/EP0639743B1/de not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2321261A1 (es) * | 2007-03-13 | 2009-06-03 | Bsh Electrodosmeticos España S.A. | Campo de coccion con una zona de sensor de temperatura. |
| ES2321261B1 (es) * | 2007-03-13 | 2010-03-04 | Bsh Electrodosmeticos España S.A. | Campo de coccion con una zona de sensor de temperatura. |
Also Published As
| Publication number | Publication date |
|---|---|
| DE59409763D1 (de) | 2001-07-05 |
| DE9312369U1 (de) | 1994-12-15 |
| EP0639743A2 (de) | 1995-02-22 |
| EP0639743A3 (de) | 1998-11-25 |
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