EP1154675A1 - Device and method to control the cooktop surface of a glass ceramic plate - Google Patents
Device and method to control the cooktop surface of a glass ceramic plate Download PDFInfo
- Publication number
- EP1154675A1 EP1154675A1 EP01103428A EP01103428A EP1154675A1 EP 1154675 A1 EP1154675 A1 EP 1154675A1 EP 01103428 A EP01103428 A EP 01103428A EP 01103428 A EP01103428 A EP 01103428A EP 1154675 A1 EP1154675 A1 EP 1154675A1
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- EP
- European Patent Office
- Prior art keywords
- cooktops
- temperature measurement
- glass ceramic
- controlling
- pot detection
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- 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.)
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- 239000002241 glass-ceramic Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000004020 conductor Substances 0.000 claims abstract description 40
- 238000010411 cooking Methods 0.000 claims abstract description 30
- 230000001939 inductive effect Effects 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 claims description 43
- 238000009529 body temperature measurement Methods 0.000 claims description 42
- 238000010438 heat treatment Methods 0.000 claims description 13
- 230000001419 dependent effect Effects 0.000 claims description 4
- 238000011156 evaluation Methods 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 238000013016 damping Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
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- 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
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- 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
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- 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
- H05B2213/07—Heating plates with temperature control means
Definitions
- the present invention relates to a device and a method for control of cooktops with glass ceramic cooktops.
- the temperature of the cooking zones of hobs with glass ceramic hobs is limited with mechanical protection temperature controllers. From DE-A 40 22 846 and EP-A 0 823 620 sensors are known which act directly on the glass ceramic be applied. You measure the temperature by changing the electrical Resistance of the conductor track or the glass ceramic base material the respective cooking surface. Monitoring the temperature Directly on the glass ceramic is cheap because of overheating or overloading the glass ceramic and the possibly standing pot avoided becomes. The direct glass ceramic temperature measurement thus makes an additional one Security achieved.
- a hotplate with a switch for the Energy supply of the heating device is known from AT-A 238 331. The switching device gives the energy supply to the heating device when putting on the Pot free and interrupts the energy supply when removing the pot.
- Pot detection systems with known optical sensors are described in DE-A 37 11 589 and DE-A 37 33 108.
- Inductive proximity switches are based on the principle of damping an oscillating circuit as a result of eddy current losses in metals that occur in the stray magnetic field a multi-winded sensor coil.
- Pot detection systems with one inductive sensor in the form of a coil are described in EP-A 0 442 275 and EP-A 0 469 189.
- Capacitive sensors for pot detection are known from WO-A 90/107851 and EP-A 0 429 120.
- DE-A 197 00 735 describes a device for inductive detection of Cookware described.
- the sensors each consist of a single-wind Coil for the transmitter and the receiver, which are concentric in the circle Cooking zone are arranged.
- the coils can be placed on a support plate, in particular a glass ceramic hotplate, applied conductor tracks his.
- DE-A 196 46 826 describes apparatus and methods for temperature measurement and pot detection at hotplates known.
- the sensor is designed as a conductor track, wherein a temperature-dependent between its two outer connection ends electrical resistance is measurable. Two measuring connections are from the conductor track branched, the two branch points one from the outer Central cable section of the conductor path facing away from the connecting ends Limit temperature measurement.
- the object of the present invention is a new device to control cooktops with glass ceramic cooktops with reduced Number of components, easier connection and safe function as well as an economical one and safe method for controlling cooktops with glass ceramic cooktops to provide.
- the object underlying the invention is achieved by a device for Control of cooktops with glass ceramic cooktops and at least one Circuit structure solved, the circuit structure being a combination of at least one inductive pot detection and at least one temperature measurement contains, the temperature measurement by means of between at least two conductor tracks located glass ceramic and the conductor track for temperature measurement in the edge area and in the center area of the Cooking zone is arranged.
- This combination makes the same sensors for pot detection and uses the temperature measurement, whereby a simplified according to the invention System with a reduced number of components, easier connection and safer Function is maintained. This also makes it possible to make the connections to lead the inner conductor structure directly next to each other for pot detection, so that the enclosed area is minimized and safe operation by avoiding the malfunction by switching on the cooking zone when setting up of cookware in the cold area is made possible.
- the cooking surface according to the invention preferably contains a conductor track coating for measuring, monitoring and displaying the temperature required for automatic power distribution, empty cooking shutdown and temperature limitation is being used.
- the cooktop also contains a conductor track coating for automatic pot, pot shape and pot size detection.
- the conductor track is for the Temperature measurement in the center area carried out as an electrode with an open end.
- the conductor track for temperature measurement in the center area as a loop-shaped electrode executed.
- the lines for the inner circuit circuit are arranged directly next to each other. This arrangement according to the invention advantageously prevents that there is interference and increased uncertainty when a pot is not placed centrally on the hob.
- a multi-circuit heating element is provided, the innermost one Heating circuit is formed according to the present invention.
- the invention is suitable for use in multi-circuit radiators.
- According to the invention is an economical method for controlling cooktops provided with glass ceramic cooktops with a conductor track structure, combined pot detection and temperature measurement.
- a preferred embodiment of the invention is a method, wherein the Temperature measurement by evaluating the temperature-dependent conductor resistance he follows. Good results are achieved by the evaluation.
- a preferred embodiment of the invention is a method, wherein the Temperature measurement by evaluating the temperature-dependent resistance the glass ceramic takes place between at least two conductor tracks. The evaluation gives very good results.
- a preferred embodiment of the invention is a method, wherein the Temperature measurement in the edge area and in the center area of the cooking zone he follows. With this arrangement, the entire heating surface is captured very advantageously.
- a preferred embodiment of the invention is a method, wherein the Temperature measurement in the center area via an electrode with an open end or via a loop-shaped electrode.
- a preferred embodiment of the invention is a method, wherein the signals of pot detection and temperature measurement by different frequencies for pot detection and temperature measurement.
- a preferred embodiment of the invention is a method, wherein the signals of pot detection and temperature measurement through time-shifted Queries are separated.
- a preferred embodiment of the invention is a method, the adjustment the relative sensitivity of temperature measurement from outside and Interior by choosing the lengths and distances of the ladder.
- the separation of the signals detected by the same sensors from the pot detection and temperature measurement takes place through use and decoupling of AC voltages of different frequencies. So the pot detection from 10 MHz to 17 MHz, preferably from 11 MHz to 15 MHz and particularly preferably from 12.5 MHz to 13.5 MHz and the temperature measurement at 150 Hz to 600 Hz, preferably from 200 Hz to 400 Hz and particularly preferred operated from 250 Hz to 350 Hz. Also sequential query of the two Measured variables are possible.
- the conductor track area for the temperature measurement in the middle of the cooking zone carries not to the signals of the pot detection in the specified embodiment because the electrode coming from the outer circle is not a loop is executed and is therefore not flowed through by the current. It is therefore not inductively effective.
- the additional conductor structure is in the middle of the cooking zone only derived from the pot detection of the inner heating circuit. With this structure will contribute to both the critical interior of cookware small and large diameter recorded.
- the exterior of the large heating circuit can by a separate temperature measurement the outer pot detection structure can be detected, such as that for implementation a power redistribution is described in DE-A 40 22 846.
- the temperature measurement can be sufficient for those described in the literature Applications such as protection temperature limitation, power redistribution, Residual heat indicator or automatic cooking can be used.
- the applications are described in DE-A 21 39 828, DE-A 40 22 846 and DE-A 37 44 372, which is explicitly referred to here.
- the arrangement according to the invention has the following advantages.
- the same Sensors are used for pot detection and temperature limitation.
- the number of sensors used is halved compared to conventional ones Systems. So can the mechanical protective temperature limiter to be dispensed with.
- the number of connections for inductive pot detection the additional function of temperature measurement does not use conductor tracks elevated.
- the leads to the conductor tracks of the pot detection can be tight put together and malfunctions by placing pots in the cold area be prevented.
- FIGS. 1 to 5 The drawing exists from FIGS. 1 to 5.
- Fig. 1 shows an embodiment of the prior art.
- the conductor tracks (A) for measuring the temperature in the central area of the cooking zone using the Resistance of the glass ceramic are between the connections for the Pot detection and the connections for the temperature measurement led out.
- the connection for the pot detection encloses one in the cold area large area and acts as a single-winding coil, which is used to switch on the pan detection can lead.
- Fig. 2 shows an embodiment of the device according to the invention.
- the circular tracks of the pot detection and those in the middle the conductor tracks of an electronic temperature measurement leading the cooking zone combined. This is achieved by the outer circle (1) of the pot detection with a single leading electrode designed as an electrode Track (2) is added.
- the inner circle (3) is around this single trace led around.
- the outer circle represents the cooking zone (4).
- FIG 3 shows a further embodiment of the device according to the invention.
- the circular traces of the pot detection and the conductor tracks of an electronic temperature measurement leading into the middle of the cooking zone combined. This is achieved by the outer circle (1) of the Pot detection with a conductor track in the middle designed as a loop (2) is added. The inner circle (3) is led around this loop. The outer circle represents the cooking zone (4).
- Fig. 4 shows a multi-circuit heating element, the innermost heating circuit according to Fig. 2 is formed.
- a dual-circuit cooking zone is shown as an example, the additional conductor track structure in the middle of the cooking zone only from the pan detection of the inner heating circuit (5) is derived. With this structure the critical interior of both small and large cookware detected.
- Fig. 5 shows a multi-circuit heating element, the innermost heating circuit according to Fig. 3 is formed.
Abstract
Description
Die vorliegende Erfindung betrifft eine Vorrichtung und ein Verfahren zur Steuerung von Kochfeldern mit Glaskeramikkochflächen.The present invention relates to a device and a method for control of cooktops with glass ceramic cooktops.
Die Temperatur der Kochzonen von Kochfeldern mit Glaskeramik-Kochflächen wird mit mechanischen Schutztemperatur-Reglern begrenzt. Aus DE-A 40 22 846 und EP-A 0 823 620 sind Sensoren bekannt, die direkt auf die Glaskeramik aufgebracht werden. Sie messen die Temperatur durch Änderung des elektrischen Widerstandes der Leiterbahn oder des Glaskeramik-Grundmaterials der jeweiligen Kochfläche. Die Überwachung der Temperatur direkt an der Glaskeramik ist günstig, da ein Überhitzen oder eine Überbelastung der Glaskeramik und des eventuell darauf stehenden Topfes vermieden wird. Durch die direkte Glaskeramik -Temperaturerfassung wird somit eine zusätzliche Sicherheit erreicht. Eine Kochstelle mit einer Schalteinrichtung für die Energiezufuhr der Heizeinrichtung ist aus AT-A 238 331 bekannt. Die Schalteinrichtung gibt die Energiezufuhr zur Heizeinrichtung beim Aufsetzen des Topfes frei und unterbricht die Energiezufuhr beim Abnehmen des Topfes.The temperature of the cooking zones of hobs with glass ceramic hobs is limited with mechanical protection temperature controllers. From DE-A 40 22 846 and EP-A 0 823 620 sensors are known which act directly on the glass ceramic be applied. You measure the temperature by changing the electrical Resistance of the conductor track or the glass ceramic base material the respective cooking surface. Monitoring the temperature Directly on the glass ceramic is cheap because of overheating or overloading the glass ceramic and the possibly standing pot avoided becomes. The direct glass ceramic temperature measurement thus makes an additional one Security achieved. A hotplate with a switch for the Energy supply of the heating device is known from AT-A 238 331. The switching device gives the energy supply to the heating device when putting on the Pot free and interrupts the energy supply when removing the pot.
Aus DE-A 35 33 997 und DE-A 33 27 622 sind Topferkennungssysteme mit optischen Fühlern bekannt. Topferkennungssysteme mit induktiven Fühlern sind in DE-A 37 11 589 und DE-A 37 33 108 beschrieben. Induktive Näherungsschalter beruhen auf dem Prinzip der Dämpfung eines Schwingkreises infolge von Wirbelstromverlusten in Metallen, die sich im magnetischen Streufeld einer vielwindigen Sensorspule befinden. Topferkennungssysteme mit einem induktiven Sensor in Form einer Spule werden in EP-A 0 442 275 und EP-A 0 469 189 beschrieben. Kapazitive Sensoren zur Topferkennung sind aus WO-A 90/107851 und EP-A 0 429 120 bekannt.From DE-A 35 33 997 and DE-A 33 27 622 are pot detection systems with known optical sensors. Pot detection systems with inductive sensors are described in DE-A 37 11 589 and DE-A 37 33 108. Inductive proximity switches are based on the principle of damping an oscillating circuit as a result of eddy current losses in metals that occur in the stray magnetic field a multi-winded sensor coil. Pot detection systems with one inductive sensor in the form of a coil are described in EP-A 0 442 275 and EP-A 0 469 189. Capacitive sensors for pot detection are known from WO-A 90/107851 and EP-A 0 429 120.
In der DE-A 197 00 735 wird eine Einrichtung zur induktiven Erkennung von Kochgeschirr beschrieben. Die Sensoren bestehen aus je einer einwindigen Spule für den Sender und den Empfänger, die kreisförmig konzentrisch in der Kochzone angeordnet sind. Dabei können die Spulen als auf einer Tragplatte, insbesondere einer Glaskeramik-Kochplatte, aufgebrachte Leiterbahnen ausgebildet sein.DE-A 197 00 735 describes a device for inductive detection of Cookware described. The sensors each consist of a single-wind Coil for the transmitter and the receiver, which are concentric in the circle Cooking zone are arranged. The coils can be placed on a support plate, in particular a glass ceramic hotplate, applied conductor tracks his.
Bei den bestehenden Systemen ergeben sich folgende Nachteile:The existing systems have the following disadvantages:
Für die Kombination einer Topferkennung und einer Temperaturüberwachung werden derzeit zwei unterschiedliche Systeme, wie Spulen für induktive Topferkennung und mechanischer Schutztemperaturbegrenzer, mit verschiedenen Bauteilen verwendet.For the combination of pot detection and temperature monitoring are currently two different systems, such as coils for inductive pot detection and mechanical protection temperature limiter, with different Components used.
Aus DE-A 196 46 826 sind Vorrichtung und Verfahren zur Temperaturmessung und Topferkennung an Kochstellen bekannt. Darin wird eine Vorrichtung zur Temperaturmessung einer Kochstelle aus Glaskeramik und/oder zur Erkennung eines auf der Kochstelle beheizten Kochtopfes beschrieben. Dabei ist mindestens ein Sensor an der Kochstelle, insbesondere unmittelbar unterhalb der Kochstelle angebrachten. Der Sensor ist als Leiterbahn ausgebildet, wobei zwischen dessen beiden äußeren Anschlussenden ein temperaturabhängiger elektrischer Widerstand messbar ist. Zwei Messanschlüsse sind von der Leiterbahn abgezweigt, wobei die beiden Abzweigpunkte einen von den äußeren Anschlussenden abgewandten, zentralen Leitungsabschnitt der Leiterbahn zur Temperaturmessung begrenzen.DE-A 196 46 826 describes apparatus and methods for temperature measurement and pot detection at hotplates known. In it a device for Temperature measurement of a glass ceramic hob and / or for detection of a saucepan heated on the hotplate. It is at least one sensor at the hotplate, especially immediately below attached to the hob. The sensor is designed as a conductor track, wherein a temperature-dependent between its two outer connection ends electrical resistance is measurable. Two measuring connections are from the conductor track branched, the two branch points one from the outer Central cable section of the conductor path facing away from the connecting ends Limit temperature measurement.
Bei der Kombination einer Topferkennung gemäß DE-A 197 00753 und einer Temperaturbegrenzung gemäß DE-A 40 22 846 sowie EP-A 0 823 620 sind für jede Kochzone mindestens sechs Anschlüsse erforderlich. Weiterhin müssen die Leiterbahnen für die Zuleitungen des Temperaturfühlers zwischen die Leiterbahnen der Zuleitungen der Topferkennung gelegt werden. Hierdurch umschließen die Zuleitungen der Topferkennung im Kaltbereich eine so große Fläche, dass im Kaltbereich abgestellte Töpfe zum Einschalten der Kochzone führen können, was ein erhebliches Sicherheitsrisiko bedeutet.When combining a pot detection according to DE-A 197 00753 and one Temperature limits according to DE-A 40 22 846 and EP-A 0 823 620 are for each cooking zone requires at least six connections. Furthermore must the conductor tracks for the leads of the temperature sensor between the conductor tracks of the leads for the pot detection. Enclose this the leads of the pot detection in the cold area such a large one Area that pots placed in the cold area to switch on the cooking zone can lead, which means a significant security risk.
Die Aufgabe der vorliegenden Erfindung besteht darin, eine neue Vorrichtung zur Steuerung von Kochfeldern mit Glaskeramikkochflächen mit verringerter Bauteilzahl, einfacheren Anschluss und sicherer Funktion sowie ein wirtschaftliches und sicheres Verfahren zur Steuerung von Kochfeldern mit Glaskeramikkochflächen bereitzustellen. The object of the present invention is a new device to control cooktops with glass ceramic cooktops with reduced Number of components, easier connection and safe function as well as an economical one and safe method for controlling cooktops with glass ceramic cooktops to provide.
Die der Erfindung zugrundeliegende Aufgabe wird durch eine Vorrichtung zur Steuerung von Kochfeldern mit Glaskeramikkochflächen und mindestens einer Leiterbahnstruktur gelöst, wobei die Leiterbahnstruktur eine Kombination von mindestens einer induktiven Topferkennung und mindestens einer Temperaturmessung enthält, wobei die Temperaturmessung mittels der zwischen mindestens zwei Leiterbahnen befindlichen Glaskeramik erfolgt und die Leiterbahn für die Temperaturmessung im Randbereich und im Zentrumsbereich der Kochzone angeordnet ist.The object underlying the invention is achieved by a device for Control of cooktops with glass ceramic cooktops and at least one Circuit structure solved, the circuit structure being a combination of at least one inductive pot detection and at least one temperature measurement contains, the temperature measurement by means of between at least two conductor tracks located glass ceramic and the conductor track for temperature measurement in the edge area and in the center area of the Cooking zone is arranged.
Durch diese Kombination werden dieselben Fühler für die Topferkennung und die Temperaturmessung verwendet, wodurch erfindungsgemäß ein vereinfachtes System mit verringerter Bauteilzahl, einfacheren Anschluss und sicherer Funktion erhalten wird. Weiterhin ist es hierdurch möglich, die Anschlüsse der inneren Leiterstruktur für die Topferkennung direkt nebeneinander zu führen, so dass die umschlossene Fläche minimiert wird und ein sicherer Betrieb durch Vermeidung der Fehlfunktion durch Einschalten der Kochzone bei Aufstellen von Kochgeschirr im Kaltbereich ermöglicht wird.This combination makes the same sensors for pot detection and uses the temperature measurement, whereby a simplified according to the invention System with a reduced number of components, easier connection and safer Function is maintained. This also makes it possible to make the connections to lead the inner conductor structure directly next to each other for pot detection, so that the enclosed area is minimized and safe operation by avoiding the malfunction by switching on the cooking zone when setting up of cookware in the cold area is made possible.
Erfindungsgemäß wird erreicht, dass die für die Topferkennung relevanten Strukturen im Randbereich der Kochzone verbleiben. Maximaler Signalhub, welcher bei Abdeckung des inneren Kreises durch einen aufgestellten Topf auftritt, kann somit weiterhin bei auf die Kochzonengröße angepasste Topfgrößen abgestimmt werden. Andererseits kann für die Temperaturbegrenzung wichtige Innenbereich der Kochzone, insbesondere bei schlechtem Geschirr, erfasst werden. Vorteilhaft an der Anordnung ist weiterhin, dass auch der Randbereich durch Temperaturfühler erfasst wird. Belastungsfälle, wie versetzte Töpfe, welche hohe Temperaturen im Randbereich erzeugen, werden erfasst, siehe Normentwurf DIN VDE 0700 Teil 6, Anhang 8. Die relative Empfindlichkeit der Temperaturmessung zwischen dem Rand und dem Innenbereich kann durch die jeweiligen Leiterlängen in den einzelnen Bereichen und durch die Leiterbahnabstände in diesen Bereichen eingestellt werden.According to the invention it is achieved that those relevant for pot detection Structures in the edge area of the cooking zone remain. Maximum signal swing, which when the inner circle is covered by a pot occurs, can therefore continue with pot sizes adapted to the cooking zone size be coordinated. On the other hand, for temperature limitation important interior of the cooking zone, especially with poor dishes, be recorded. Another advantage of the arrangement is that the Edge area is detected by temperature sensors. Stress cases, such as transferred Pots that generate high temperatures in the edge area are recorded, see draft standard DIN VDE 0700 Part 6, Appendix 8. The relative sensitivity the temperature measurement between the edge and the interior can be determined by the respective conductor lengths in the individual areas and can be set by the conductor spacing in these areas.
Die erfindungsgemäße Kochfläche enthält bevorzugt eine Leiterbahnbeschichtung zur Messung, Überwachung und Anzeige der Temperatur, die zur automatischen Energieverteilung, Leerkochabschaltung und Temperaturbegrenzung genutzt wird. Die Kochfläche enthält zusätzlich eine Leiterbahnbeschichtung zur automatischen Topf-, Topfform- und Topfgrößenerkennung. Die erfindungsgemäße Anordnung bewirkt überraschend und unerwartet verbesserte Benutzerfreundlichkeit und erhöhte Sicherheit im Gebrauch sowie erhebliche Energieersparnis.The cooking surface according to the invention preferably contains a conductor track coating for measuring, monitoring and displaying the temperature required for automatic power distribution, empty cooking shutdown and temperature limitation is being used. The cooktop also contains a conductor track coating for automatic pot, pot shape and pot size detection. The The arrangement according to the invention surprisingly and unexpectedly improves Ease of use and increased security in use as well as significant Energy saving.
Bei einer bevorzugten Ausgestaltung der Erfindung ist die Leiterbahn für die Temperaturmessung im Zentrumsbereich als Elektrode mit offenem Ende ausgeführt.In a preferred embodiment of the invention, the conductor track is for the Temperature measurement in the center area carried out as an electrode with an open end.
Bei einer weiteren bevorzugten Ausgestaltung der Erfindung ist die Leiterbahn für die Temperaturmessung im Zentrumsbereich als schleifenförmige Elektrode ausgeführt.In a further preferred embodiment of the invention, the conductor track for temperature measurement in the center area as a loop-shaped electrode executed.
Bei einer weiteren besonders bevorzugten Ausgestaltung der Erfindung sind die Leitungen für den inneren Leiterbahnkreis unmittelbar nebeneinander angeordnet. Durch diese erfindungsgemäße Anordnung wird vorteilhaft verhindert, dass es zur Störungen und erhöhter Unsicherheit kommt, wenn ein Topf nicht zentral auf die Kochfläche platziert wird.In a further particularly preferred embodiment of the invention the lines for the inner circuit circuit are arranged directly next to each other. This arrangement according to the invention advantageously prevents that there is interference and increased uncertainty when a pot is not placed centrally on the hob.
Erfindungsgemäß ist ein Mehrkreisheizkörper vorgesehen, wobei der innerste Heizkreis gemäß der vorliegenden Erfindung ausgebildet ist. Die erfindungsgemäße Vorrichtung eignet sich zum Einsatz in Mehrkreisheizkörpern.According to the invention, a multi-circuit heating element is provided, the innermost one Heating circuit is formed according to the present invention. The invention The device is suitable for use in multi-circuit radiators.
Erfindungsgemäß ist ein wirtschaftliches Verfahren zur Steuerung von Kochfeldern mit Glaskeramikkochflächen mit einer Leiterbahnstruktur vorgesehen, wobei eine kombinierte Topferkennung und Temperaturmessung erfolgt.According to the invention is an economical method for controlling cooktops provided with glass ceramic cooktops with a conductor track structure, combined pot detection and temperature measurement.
Eine bevorzugte Ausgestaltung der Erfindung ist ein Verfahren, wobei die Temperaturmessung durch Auswertung des temperaturabhängigen Leiterbahnwiderstandes erfolgt. Durch die Auswertung werden gute Ergebnisse erzielt.A preferred embodiment of the invention is a method, wherein the Temperature measurement by evaluating the temperature-dependent conductor resistance he follows. Good results are achieved by the evaluation.
Eine bevorzugte Ausgestaltung der Erfindung ist ein Verfahren, wobei die Temperaturmessung durch Auswertung des temperaturabhängigen Widerstandes der Glaskeramik zwischen mindestens zwei Leiterbahnen erfolgt. Durch die Auswertung werden sehr gute Ergebnisse erzielt.A preferred embodiment of the invention is a method, wherein the Temperature measurement by evaluating the temperature-dependent resistance the glass ceramic takes place between at least two conductor tracks. The evaluation gives very good results.
Eine bevorzugte Ausgestaltung der Erfindung ist ein Verfahren, wobei die Temperaturmessung im Randbereich und im Zentrumsbereich der Kochzone erfolgt. Mit dieser Anordnung wird die gesamte Heizfläche sehr vorteilhaft erfasst.A preferred embodiment of the invention is a method, wherein the Temperature measurement in the edge area and in the center area of the cooking zone he follows. With this arrangement, the entire heating surface is captured very advantageously.
Eine bevorzugte Ausgestaltung der Erfindung ist ein Verfahren, wobei die Temperaturmessung im Zentrumsbereich über eine Elektrode mit offenem Ende oder über eine schleifenförmige Elektrode erfolgt.A preferred embodiment of the invention is a method, wherein the Temperature measurement in the center area via an electrode with an open end or via a loop-shaped electrode.
Eine bevorzugte Ausgestaltung der Erfindung ist ein Verfahren, wobei die Signale von Topferkennung und Temperaturmessung durch unterschiedliche Frequenzen für die Topferkennung und Temperaturmessung getrennt werden.A preferred embodiment of the invention is a method, wherein the signals of pot detection and temperature measurement by different frequencies for pot detection and temperature measurement.
Eine bevorzugte Ausgestaltung der Erfindung ist ein Verfahren, wobei die Signale von Topferkennung und Temperaturmessung durch zeitlich versetztes Abfragen getrennt werden.A preferred embodiment of the invention is a method, wherein the signals of pot detection and temperature measurement through time-shifted Queries are separated.
Eine bevorzugte Ausgestaltung der Erfindung ist ein Verfahren, wobei die Einstellung der relativen Empfindlichkeit der Temperaturmessung von Außen- und Innenbereich durch Wahl der Längen und Abstände der Leiter erfolgt.A preferred embodiment of the invention is a method, the adjustment the relative sensitivity of temperature measurement from outside and Interior by choosing the lengths and distances of the ladder.
Die Trennung der mit denselben Sensoren erfassten Signale von Topferkennung und Temperaturmessung erfolgt durch Verwendung und Auskoppelung von Wechselspannungen unterschiedlicher Frequenzen. So wird die Topferkennung von 10 MHz bis 17 MHz, bevorzugt von 11 MHz bis 15 MHz und besonders bevorzugt von 12.5 MHZ bis 13,5 MHz und die Temperaturmessung bei 150 Hz bis 600 Hz, bevorzugt von 200 Hz bis 400 Hz und besonders bevorzugt von 250 Hz bis 350 Hz betrieben. Auch sequentielle Abfrage der beiden Messgrößen ist möglich.The separation of the signals detected by the same sensors from the pot detection and temperature measurement takes place through use and decoupling of AC voltages of different frequencies. So the pot detection from 10 MHz to 17 MHz, preferably from 11 MHz to 15 MHz and particularly preferably from 12.5 MHz to 13.5 MHz and the temperature measurement at 150 Hz to 600 Hz, preferably from 200 Hz to 400 Hz and particularly preferred operated from 250 Hz to 350 Hz. Also sequential query of the two Measured variables are possible.
Der Leiterbahnbereich für die Temperaturmessung in der Kochzonenmitte trägt in der angegebenen Ausführungsform nicht zu den Signalen der Topferkennung bei, da die von äußerem Kreis ausgehende Elektrode nicht als Schleife ausgeführt ist und daher nicht vom Strom durchflossen wird. Sie ist somit nicht induktiv wirksam.The conductor track area for the temperature measurement in the middle of the cooking zone carries not to the signals of the pot detection in the specified embodiment because the electrode coming from the outer circle is not a loop is executed and is therefore not flowed through by the current. It is therefore not inductively effective.
Bei Zweikreiskochzonen wird die Zusatz-Leiterbahnstruktur in der Kochzonenmitte nur von der Topferkennung des inneren Heizkreises abgeleitet. Mit dieser Struktur wird der kritische Innenbereich von Kochgeschirr sowohl bei kleinem als auch bei großem Durchmesser erfasst. Der Außenbereich des großen Heizkreises kann dabei durch eine gesonderte Temperaturmessung an der äußeren Topferkennungsstruktur erfasst werden, wie das zur Durchführung einer Leistungsumverteilung in DE-A 40 22 846 beschrieben ist.In dual-circuit cooking zones, the additional conductor structure is in the middle of the cooking zone only derived from the pot detection of the inner heating circuit. With this structure will contribute to both the critical interior of cookware small and large diameter recorded. The exterior of the large heating circuit can by a separate temperature measurement the outer pot detection structure can be detected, such as that for implementation a power redistribution is described in DE-A 40 22 846.
Die Temperaturmessung kann für die in der Literatur hinreichend beschriebenen Anwendungen, wie Schutztemperaturbegrenzung, Leistungsumverteilung, Restwärmeanzeige oder Kochautomatik eingesetzt werden. Die Anwendungen werden in DE-A 21 39 828, DE-A 40 22 846 und DE-A 37 44 372 beschrieben, worauf hier explizit Bezug genommen wird.The temperature measurement can be sufficient for those described in the literature Applications such as protection temperature limitation, power redistribution, Residual heat indicator or automatic cooking can be used. The applications are described in DE-A 21 39 828, DE-A 40 22 846 and DE-A 37 44 372, which is explicitly referred to here.
Die erfindungsgemäße Anordnung weist folgende Vorteile auf. Die selben Fühler werden für die Topferkennung und die Temperaturbegrenzung verwendet. Die Anzahl der eingesetzten Sensoren halbiert sich gegenüber herkömmlichen Systemen. So kann auf den mechanischen Schutztemperaturbegrenzer verzichtet werden. Die Anzahl der Anschlüsse der induktiven Topferkennung mittels Leiterbahnen wird durch die Zusatzfunktion Temperaturmessung nicht erhöht. Die Zuleitungen zu den Leiterbahnen der Topferkennung können dicht zusammen gelegt und Fehlfunktionen durch Aufstellen von Töpfen im Kaltbereich verhindert werden.The arrangement according to the invention has the following advantages. The same Sensors are used for pot detection and temperature limitation. The number of sensors used is halved compared to conventional ones Systems. So can the mechanical protective temperature limiter to be dispensed with. The number of connections for inductive pot detection the additional function of temperature measurement does not use conductor tracks elevated. The leads to the conductor tracks of the pot detection can be tight put together and malfunctions by placing pots in the cold area be prevented.
Die Erfindung wird anhand einer Zeichnung näher erläutert. Die Zeichnung besteht aus Fig. 1 bis Fig. 5.The invention is explained in more detail with reference to a drawing. The drawing exists from FIGS. 1 to 5.
Fig. 1 zeigt eine Ausführungsform des Standes der Technik. Die Leiterbahnen (A) zur Messung der Temperatur im Mittenbereich der Kochzone mittels des Widerstandes der Glaskeramik werden zwischen den Anschlüssen für die Topferkennung und den Anschlüssen für die Temperaturmessung herausgeführt. Der Anschluss für die Topferkennung umschließt im Kaltbereich eine große Fläche und wirkt als einwindige Spule, die zum Einschalten der Topferkennung führen kann.Fig. 1 shows an embodiment of the prior art. The conductor tracks (A) for measuring the temperature in the central area of the cooking zone using the Resistance of the glass ceramic are between the connections for the Pot detection and the connections for the temperature measurement led out. The connection for the pot detection encloses one in the cold area large area and acts as a single-winding coil, which is used to switch on the pan detection can lead.
Fig. 2 zeigt eine Ausführungsform der erfindungsgemäßen Vorrichtung. Dabei werden die kreisförmigen Leiterbahnen der Topferkennung und die in die Mitte der Kochzone führenden Leiterbahnen einer elektronischen Temperaturmessung kombiniert. Dies wird erreicht, indem der äußere Kreis (1) der Topferkennung mit einer einzelnen in die Mitte führenden als Elektrode ausgebildete Leiterbahn (2) ergänzt wird. Der innere Kreis (3) wird um diese einzelne Leiterbahn herumgeführt. Der äußere Kreis stellt die Kochzone (4) dar. Fig. 2 shows an embodiment of the device according to the invention. there the circular tracks of the pot detection and those in the middle the conductor tracks of an electronic temperature measurement leading the cooking zone combined. This is achieved by the outer circle (1) of the pot detection with a single leading electrode designed as an electrode Track (2) is added. The inner circle (3) is around this single trace led around. The outer circle represents the cooking zone (4).
Fig. 3 zeigt eine weitere Ausführungsform der erfindungsgemäßen Vorrichtung. Dabei werden die kreisförmigen Leiterbahnen der Topferkennung und die in die Mitte der Kochzone führenden Leiterbahnen einer elektronischen Temperaturmessung kombiniert. Dies wird erreicht, indem der äußere Kreis (1) der Topferkennung mit einer in die Mitte führenden als Schleife ausgebildete Leiterbahn (2) ergänzt wird. Der innere Kreis (3) wird um diese Schleife herumgeführt. Der äußere Kreis stellt die Kochzone (4) dar.3 shows a further embodiment of the device according to the invention. The circular traces of the pot detection and the conductor tracks of an electronic temperature measurement leading into the middle of the cooking zone combined. This is achieved by the outer circle (1) of the Pot detection with a conductor track in the middle designed as a loop (2) is added. The inner circle (3) is led around this loop. The outer circle represents the cooking zone (4).
Fig. 4 zeigt einen Mehrkreisheizkörper, wobei der innerste Heizkreis gemäß Fig. 2 ausgebildet ist. Es wird beispielhaft eine Zweikreiskochzone dargestellt, wobei die Zusatz-Leiterbahnstruktur in der Kochzonenmitte nur von der Topferkennung des inneren Heizkreises (5) abgeleitet wird. Mit dieser Struktur wird der kritische Innenbereich sowohl vom kleinen als auch vom großen Kochgeschirr erfasst.Fig. 4 shows a multi-circuit heating element, the innermost heating circuit according to Fig. 2 is formed. A dual-circuit cooking zone is shown as an example, the additional conductor track structure in the middle of the cooking zone only from the pan detection of the inner heating circuit (5) is derived. With this structure the critical interior of both small and large cookware detected.
Fig. 5 zeigt einen Mehrkreisheizkörper, wobei der innerste Heizkreis gemäß Fig. 3 ausgebildet ist.Fig. 5 shows a multi-circuit heating element, the innermost heating circuit according to Fig. 3 is formed.
Ein Vergleich der Figuren zeigt deutlich, dass bei einer Leiterbahnstruktur laut Stand der Technik, wie in Figur 1 dargestellt, für die Topferkennung und Temperaturmessung acht Leitungen, wogegen bei der erfindungsgemäßen Leiterbahnstruktur, wie in den Figuren 2 und 3 dargestellt, nur sechs Leitungen erforderlich sind.A comparison of the figures clearly shows that a conductor track structure is loud State of the art, as shown in Figure 1, for pot detection and temperature measurement eight lines, whereas in the conductor structure according to the invention, as shown in Figures 2 and 3, only six lines required are.
Claims (12)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10023179 | 2000-05-11 | ||
DE10023179A DE10023179C2 (en) | 2000-05-11 | 2000-05-11 | Device and its use Control of cooktops with glass ceramic cooktops |
Publications (2)
Publication Number | Publication Date |
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EP1154675A1 true EP1154675A1 (en) | 2001-11-14 |
EP1154675B1 EP1154675B1 (en) | 2002-09-18 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP01103428A Expired - Lifetime EP1154675B1 (en) | 2000-05-11 | 2001-02-14 | Device and method to control the cooktop surface of a glass ceramic plate |
Country Status (7)
Country | Link |
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US (1) | US6501054B2 (en) |
EP (1) | EP1154675B1 (en) |
AT (1) | ATE224629T1 (en) |
DE (2) | DE10023179C2 (en) |
DK (1) | DK1154675T3 (en) |
ES (1) | ES2182810T3 (en) |
PL (1) | PL347461A1 (en) |
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EP2763500A1 (en) * | 2013-01-29 | 2014-08-06 | BSH Bosch und Siemens Hausgeräte GmbH | Hob with a hotplate field and a conductor as surface boundary for electronic components |
EP3026981A1 (en) * | 2014-11-25 | 2016-06-01 | E.G.O. ELEKTRO-GERÄTEBAU GmbH | Induction cooktop and method for controlling an induction cooktop |
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CN101936554B (en) * | 2010-08-31 | 2015-09-09 | 浙江苏泊尔家电制造有限公司 | A kind of wireless temperature measuring device for induction cooker |
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- 2001-02-14 AT AT01103428T patent/ATE224629T1/en not_active IP Right Cessation
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Also Published As
Publication number | Publication date |
---|---|
ES2182810T3 (en) | 2003-03-16 |
DE10023179A1 (en) | 2001-11-22 |
EP1154675B1 (en) | 2002-09-18 |
US6501054B2 (en) | 2002-12-31 |
DE50100026D1 (en) | 2002-10-24 |
DK1154675T3 (en) | 2002-12-02 |
PL347461A1 (en) | 2001-11-19 |
US20010052519A1 (en) | 2001-12-20 |
DE10023179C2 (en) | 2002-07-18 |
ATE224629T1 (en) | 2002-10-15 |
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