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EP1212570A1 - Control device for a cooker - Google Patents

Control device for a cooker

Info

Publication number
EP1212570A1
EP1212570A1 EP00949468A EP00949468A EP1212570A1 EP 1212570 A1 EP1212570 A1 EP 1212570A1 EP 00949468 A EP00949468 A EP 00949468A EP 00949468 A EP00949468 A EP 00949468A EP 1212570 A1 EP1212570 A1 EP 1212570A1
Authority
EP
European Patent Office
Prior art keywords
steam
cooking
control
regulating device
heating energy
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
EP00949468A
Other languages
German (de)
French (fr)
Other versions
EP1212570B1 (en
Inventor
Frank Liese
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
BSH Bosch und Siemens Hausgeraete 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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP1212570A1 publication Critical patent/EP1212570A1/en
Application granted granted Critical
Publication of EP1212570B1 publication Critical patent/EP1212570B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F24C15/20—Removing cooking fumes
    • F24C15/2021—Arrangement or mounting of control or safety systems

Definitions

  • the invention relates to a control or regulating device of a cooker, which has a hob with at least one cooking zone, according to the preamble of claim 1.
  • the cooker is preferably electrically heated, but the invention can also be used for gas-heated cookers.
  • the cooking zone in a hob of an electric cooker can be formed by an electric heating plate or by one or more electric heating elements under a plate made of ceramic or of another heat-resistant material.
  • the object of the invention is to achieve a simple and inexpensive way to avoid unnecessarily high energy consumption for cooking food and liquids after the boiling point or boiling point has been reached.
  • control or regulating device is designed to react to cooking steam and, depending on the cooking steam, to influence the heating energy of at least one cooking zone of the hob of a cooker. NEN amount of steam, the heating energy of the cooking zone in question is reduced so far that only the heating energy necessary to maintain the boiling point temperature is supplied.
  • measuring the amount of steam means not only the possibility of measuring the amount of steam actually generated per unit of time, but preferably a method by which the amount of steam is measured indirectly, for example by detecting the heat of steam and / or the steam density and / or the steam flow rate.
  • inexpensive temperature sensors, density measuring devices, flow meters or, depending on the density, ultrasonic distance measuring devices which extend across the steam path can be used.
  • EP 0 443 141 A2 discloses a circuit arrangement for controlling a fan, in particular in the case of an extractor hood above a cooker, as a function of vapors pulling towards the fan, in which an ultrasound path with an ultrasound transmitter and a Ultrasonic receiver is arranged to measure the amount of steam and to control the fan as a function of this detected amount of steam. From the same document it is also known to regulate the fan (fan, blower or its motor) depending on the moisture and / or haze and / or smoke and / or heat flowing through the extractor hood, which is detected by a sensor element becomes. It is also known from this document to control the fan as a function of a temperature difference between the temperature of the cooking fumes (steam) and the ambient temperature.
  • such a control or regulating device of an extractor hood can not only control or regulate the heating energy of one or more cooking zones of a cooker which is arranged under such an extractor hood at the same time or instead.
  • control or regulating device of the cooker according to the invention can also be part of a central electronic control system in a building, ie a system as is also known under the name "home electronic system".
  • the cooker is preferably designed such that the heating energy of its cooking zones can be individually adjusted continuously or in small steps by the control or regulating device according to the invention.
  • control or regulating device of the invention can optionally be switched on or off manually.
  • the cooker In the switched-off state, the cooker can be switched on and off manually in a known manner and / or can be automatically controlled or regulated by an integrated system.
  • the invention has the advantage that substantial energy savings can be achieved.
  • increased operational safety is also achieved by measures by means of which dangerous operating situations of the cooker are recognized and predetermined safety measures are triggered as a function thereof.
  • measures by means of which dangerous operating situations of the cooker are recognized and predetermined safety measures are triggered as a function thereof. Examples: In the event of an abrupt interruption or sharp reduction in the amount of steam, even though the relevant cooking zone is switched on, it can be assumed that the relevant saucepan or pan has been removed from the stove. In this case, the control or regulating device can automatically switch off the heating energy of the relevant cooking zone. With a slow reduction in the amount of steam and a corresponding decrease in the steam signals, even though the relevant cooking zone is switched on unchanged, the conclusion can be drawn that, for example, all water or fat has evaporated.
  • the control or regulating device is preferably designed such that it detects such a slow reduction in the development of haze without the heating energy being reduced, and then switches off the relevant cooking zone.
  • the control or regulating device can be designed in this way, e.g. be provided with electronic logic to operate at steam change rates, i.e. Change per unit of time responds.
  • the control or regulating device of the invention is preferably designed in such a way that it depends on the number of the cooking zones switched on and / or their size and / or their power levels, the signals from the sensor device and, if they function as an extractor hood Cooking range is combined, the fan the extractor hood switches on or off and / or controls.
  • the control or regulating device is preferably designed in such a way that, in the event of excessive steam development, it reduces the performance of the cooking zone in question until the steam development corresponds to "normal" or "gentle” cooking.
  • control or regulating device of the invention can be designed in such a way that it monitors several cooking zones of a cooktop or also several cooktops.
  • control or regulating device can be designed in such a way that when several cooking zones are switched on at the same time, by "test-wise" reduction of the heating energy from several cooking zones, it consecutively looks for the cooking zone which is overheated.
  • This decision which is made by the control or regulating device, can also be made by following the development of the signals over time from the time the relevant cooking zone is switched on, for example by measuring the time-dependent steam development or temperature development of the steam and, if appropriate, also the time-dependent heating output.
  • Other operating parameters and criteria that can be automatically taken into account by the control or regulating device can include the manually switched on heating output of the cooking zones and the size of the cooking zones, the time from switching on a cooking zone to the development of a certain amount of steam or until there is no steam development, or a rapid or slow decrease in the steam development or the steam criteria associated therewith, such as steam temperature and / or steam density.
  • Fig. 1 shows schematically a front view of a control or regulating device of a cooker according to the invention in combination with a steam extractor hood arranged above the hob of the cooker.
  • FIG. 1 shows an electric cooker 2 with, for example, four cooking zones 4 in a cooktop 6.
  • Each cooking zone 4 contains, under a ceramic plate 8, at least one electric heating element, which can be switched on and off manually by a manual control element 10 on the front of the cooker and gradually to a desired heating energy or is continuously adjustable.
  • the cooker may include an oven 12.
  • An extractor hood 20 is arranged above the stove and extends essentially over all cooking zones 4.
  • the extractor hood 20 contains a fan 22 and a steam filter 24 in front of it in the steam exhaust path above a grille 26.
  • a control or regulating device 30 registers the steam rising from the cooking zones 4 when cooking food (food) and when cooking liquids such as soup, vegetables or water, and limits, controls or regulates the heating energy of the cooking zones depending on the registered steam 4th
  • the control or regulating device 30 can be arranged on or in the cooker 2 or on or in the extractor hood 20.
  • the control or regulating device is functionally connected to a sensor device 32 which is arranged in the steam extraction path of the cooking zones 4, preferably on or in the extractor hood 20.
  • the sensor device 32 generates a signal depending on the registered steam, for example depending on the Vapor density, steam flow rate, steam temperature and / or other steam values.
  • one or more of the following or further functions can be provided in the control or regulating device 30: switching off or reducing the heating energy of the relevant cooking zone 4 when a predetermined limit value is exceeded and switching on the heating energy again when the relevant steam value drops below the limit; Regulating the heating energy of the relevant cooking zone as a function of a predetermined target value, which can be a fixed value or a variable target value that can be set as a function of the manual setting element 10; Switching, control or regulating processes depending on the time period within which changes in the steam are registered by the sensor device 32, for example complete switching off of the heating energy of the cooking zone 4 in question if the steam signals suddenly fail to appear or if the registered steam value falls below a predetermined value a short time, for example because a saucepan or pan has been removed from the cooking zone in question, or with a slow decrease in steam generation, in each case with the heating energy setting on the manual control element 10 remaining unchanged, because this could be a sign that all water or fat has evaporated and therefore there is
  • the control or regulating device 30 can be designed with an alarm device for generating an alarm signal if it recognizes that the predetermined safety criteria are exceeded in it.
  • the sensor device 32 can have an ultrasound measuring section across the steam path with an ultrasound transmitter 31 and an ultrasound receiver 33.
  • a separate control or regulating device 30 and / or a separate sensor device 32 can be provided for each cooking zone 4.
  • a sensor device 32 assigned to it can be arranged in its steam flow path above each cooking zone 4, all of which are electrically connected to a control or regulating device 30 common to them.
  • a sensor device 32 common to them and a control device 30 common to them can be provided for several cooking zones 4.
  • the control or regulating device 30 is designed in such a way that it either successively reduces the heating energy of the hotplates until it recognizes which hotplate is responsible for the excessive steam development, and then only reduces its heating energy accordingly, however, the setting of the heating energy of the other hotplates remains at the value set on the control element 10; or the control or regulating device 30 determines the hotplate responsible for the excessive steam development additionally or only on the basis of operating criteria such as, for example, the heating energy set on the control element 10, the diameter of the hotplate concerned and / or the length of time for which the individual hotplates have already been switched on , Such selection criteria for determining the cooking zone 4 in question, which is responsible for the excessive steam development, can also be used to determine which cooking zone 4, despite the unchanged setting of a certain heating energy on the control element 10, suddenly stops cooking steam or becomes increasingly less.
  • the sensor device 32 can additionally be connected to a control or regulating device 34 of the extractor hood 20 in order to switch its fan 22 on or off as a function of the respective amount of cooking steam, or to switch it to a tuned speed to switch, as is known for example from said EP 0 443 141 A2.
  • the control or regulating device 34 of the fan 22 of the extractor hood 20 can be provided for switching, controlling and / or regulating the heating energy of the cooker 2 instead of its control or regulating device 30.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cookers (AREA)
  • Commercial Cooking Devices (AREA)
  • Ventilation (AREA)
  • Electric Stoves And Ranges (AREA)

Abstract

A control or regulating device of a stove influences (activates, deactivates, controls, regulates) the heat energy of at least one cooking zone of the stove in dependence upon cooking steam. The control device or a sensor device of the control device can be installed at least partly in a fume hood of the stove.

Description

Steuer- oder Regeleinrichtung eines KochherdesControl or regulating device of a cooker
Die Erfindung betrifft eine Steuer- oder Regeleinrichtung eines Kochherdes, der ein Kochfeld mit mindestens einer Kochzone hat, gemäß dem Oberbegriff von Anspruch 1.The invention relates to a control or regulating device of a cooker, which has a hob with at least one cooking zone, according to the preamble of claim 1.
Der Kochherd ist vorzugsweise elektrisch beheizbar, jedoch ist die Erfindung auch für gasbeheizte Kochherde verwendbar. Die Kochzone in einem Kochfeld eines elektrischen Kochherdes kann durch eine elektrische Heizplatte oder durch einen oder mehrere elektrische Heizkörper unter einer Platte aus Keramik oder aus einem anderen hitzebeständigen Material gebildet sein.The cooker is preferably electrically heated, but the invention can also be used for gas-heated cookers. The cooking zone in a hob of an electric cooker can be formed by an electric heating plate or by one or more electric heating elements under a plate made of ceramic or of another heat-resistant material.
Beim Weiterkochen nach Erreichen des Koch- oder Siedepunktes wird die Speise oder Flüssigkeit in einem Gefäß auf einer Kochzone sehr häufig mit zuviel Heizenergie weitererhitzt. Die Folge ist ein unnötig hoher Energieverbrauch, häufig mehr als das dreifache des tatsächlich notwendigen Energieverbrauches, verbunden mit einer starken Dampfentwicklung.When cooking continues after the boiling or boiling point has been reached, the food or liquid in a vessel on a cooking zone is very often heated further with too much heating energy. The result is an unnecessarily high energy consumption, often more than three times the actually necessary energy consumption, combined with a strong steam development.
Durch die Erfindung soll die Aufgabe gelöst werden, auf einfache und preiswerte Weise einen unnötig hohen Energieverbrauch für das Kochen von Speisen und Flüssigkeiten nach Erreichen des Kochpunktes oder Siedepunktes zu vermeiden.The object of the invention is to achieve a simple and inexpensive way to avoid unnecessarily high energy consumption for cooking food and liquids after the boiling point or boiling point has been reached.
Diese Aufgabe wird gemäß der Erfindung durch die kennzeichnenden Merkmale von Anspruch 1 gelöst.This object is achieved according to the invention by the characterizing features of claim 1.
Durch die Erfindung ist vorgesehen, daß die Steuer- oder Regeleinrichtung auf Kochdampf reagierend und in Abhängigkeit vom Kochdampf die Heizenergie von mindestens einer Kochzone des Kochfeldes eines Kochherdes beeinflussend ausgebildet ist. nen Dampfmenge wird die Heizenergie der betreffenden Kochzone so weit reduziert, daß nur noch die zum Halten der Siedepunkt-Temperatur notwendige Heizenergie zugeführt wird.The invention provides that the control or regulating device is designed to react to cooking steam and, depending on the cooking steam, to influence the heating energy of at least one cooking zone of the hob of a cooker. NEN amount of steam, the heating energy of the cooking zone in question is reduced so far that only the heating energy necessary to maintain the boiling point temperature is supplied.
Im Rahmen der vorliegenden Beschreibung der Erfindung bedeutet "Messen der Dampfmenge" nicht nur die Möglichkeit, die tatsächlich pro Zeiteinheit erzeugte Dampfmenge zu messen, sondern vorzugsweise eine Methode, durch welche die Dampfmenge indirekt gemessen wird, beispielsweise durch Detektion der Dampfwärme und/oder der Dampfdichte und/oder der Dampf-Strömungsgeschwindigkeit. Dadurch können beispielsweise preiswerte Temperatursensoren, Dichtewertmesser, Strömungsmesser oder in Abhängigkeit von der Dichte reagierende Ultraschall-Strecken-Messeinrichtungen verwendet werden, welche sich quer durch den Dampfweg erstrecken.In the context of the present description of the invention, “measuring the amount of steam” means not only the possibility of measuring the amount of steam actually generated per unit of time, but preferably a method by which the amount of steam is measured indirectly, for example by detecting the heat of steam and / or the steam density and / or the steam flow rate. As a result, inexpensive temperature sensors, density measuring devices, flow meters or, depending on the density, ultrasonic distance measuring devices which extend across the steam path can be used.
Aus der EP 0 443 141 A2 ist eine Schaltungsanordnung zur Steuerung eines Lüfters, ins- besondere bei einer Dunstabzugshaube über einem Kochherd, in Abhängigkeit von zum Lüfter ziehenden Wrasen bekannt, bei welcher vor dem Lüfter eine Ultraschall-Strecke mit einem Ultraschall-Sender und einem Ultraschall-Empfänger angeordnet ist zur Messung der Dampfmenge und zur Steuerung des Lüfters in Abhängigkeit von dieser detek- tierten Dampfmenge. Aus der gleichen Schrift ist es auch bekannt, den Lüfter (Ventilator, Gebläse, bzw. deren Motor) zu regeln in Abhängigkeit von der durch die Dunstabzugshaube strömenden Feuchtigkeit und/oder Dunst und/oder Rauch und/oder Wärme, die von einem Sensorelement detektiert wird. Ferner ist es aus dieser Schrift bekannt, den Lüfter in Abhängigkeit von einer Temperaturdifferenz zwischen der Temperatur der Kochdünste (Dampf) und der Umgebungstemperatur zu steuern.EP 0 443 141 A2 discloses a circuit arrangement for controlling a fan, in particular in the case of an extractor hood above a cooker, as a function of vapors pulling towards the fan, in which an ultrasound path with an ultrasound transmitter and a Ultrasonic receiver is arranged to measure the amount of steam and to control the fan as a function of this detected amount of steam. From the same document it is also known to regulate the fan (fan, blower or its motor) depending on the moisture and / or haze and / or smoke and / or heat flowing through the extractor hood, which is detected by a sensor element becomes. It is also known from this document to control the fan as a function of a temperature difference between the temperature of the cooking fumes (steam) and the ambient temperature.
Gemäß der Erfindung kann eine solche Steuer- oder Regeleinrichtung einer Dunstabzugshaube nicht nur den Lüfter, sondern gleichzeitig oder statt dessen auch die Heizenergie von einer oder mehreren Kochzonen eines Kochherdes steuern oder regeln, welcher unter einer solchen Dunstabzugshaube angeordnet ist.According to the invention, such a control or regulating device of an extractor hood can not only control or regulate the heating energy of one or more cooking zones of a cooker which is arranged under such an extractor hood at the same time or instead.
Ferner kann die Steuer- oder Regeleinrichtung des Kochherdes nach der Erfindung auch Teil eines zentralen elektronischen Steuerungssystems in einem Gebäude sein, d.h. einem System, wie es auch unter der Bezeichnung "home electronic System" bekannt ist. Der Kochherd ist vorzugsweise derart ausgebildet, daß die Heizenergie seiner Kochzonen einzeln stufenlos oder in kleinen Schritten einstellbar ist von der Steuer- oder Regeleinrichtung nach der Erfindung.Furthermore, the control or regulating device of the cooker according to the invention can also be part of a central electronic control system in a building, ie a system as is also known under the name "home electronic system". The cooker is preferably designed such that the heating energy of its cooking zones can be individually adjusted continuously or in small steps by the control or regulating device according to the invention.
Gemäß einer weiteren bevorzugten Ausführungsform der Erfindung ist die Steuer- oder Regeleinrichtung der Erfindung wahlweise manuell zuschaltbar oder abschaltbar. Im abgeschalteten Zustand ist der Kochherd in bekannter Weise manuell ein- und ausschaltbar und/oder durch ein in ihn integriertes System automatisch steuerbar oder regelbar.According to a further preferred embodiment of the invention, the control or regulating device of the invention can optionally be switched on or off manually. In the switched-off state, the cooker can be switched on and off manually in a known manner and / or can be automatically controlled or regulated by an integrated system.
Die Erfindung hat den Vorteil, daß eine wesentliche Energieeinsparung erzielbar ist.The invention has the advantage that substantial energy savings can be achieved.
Weitere Merkmale der Erfindung sind in den Unteransprüchen enthalten.Further features of the invention are contained in the subclaims.
Gemäß einer weiteren Ausführungsform der Erfindung wird auch eine erhöhte Betriebssi- cherheit erzielt durch Maßnahmen, durch welche gefährliche Betriebssituationen des Kochherdes erkannt werden und in Abhängigkeit davon vorbestimmte Sicherheitsmaßnahmen ausgelöst werden. Beispiele: Bei einer abrupten Unterbrechung oder starken Reduzierung der Dampfmenge, obwohl die betreffende Kochzone eingeschaltet ist, kann angenommen werden, daß der betreffende Kochtopf oder die Pfanne vom Herd genommen wurde. In diesem Falle kann eine automatische Abschaltung der Heizenergie der betreffenden Kochzone durch die Steueroder Regeleinrichtung vorgesehen werden. Bei einer langsamen Reduzierung der Dampfmenge und einer entsprechenden Abnahme der Dampfsignale, obwohl die betref- fende Kochzone unverändert eingeschaltet ist, kann die Schlußfolgerung gezogen werden, daß beispielsweise alles Wasser oder Fett verdampft ist. Die Steuer- oder Regeleinrichtung ist vorzugsweise derart ausgebildet, daß sie eine solche langsame Reduzierung der Dunstentwicklung, ohne daß die Heizenergie reduziert wurde, erkennt und dann die betreffende Kochzone abschaltet. Die Steuer- oder Regeleinrichtung kann derart ausge- bildet sein, z.B. mit einer elektronischen Logik versehen sein, daß sie auf Dampfände- rungs-Geschwindigkeiten, d.h. Änderung pro Zeiteinheit reagiert.According to a further embodiment of the invention, increased operational safety is also achieved by measures by means of which dangerous operating situations of the cooker are recognized and predetermined safety measures are triggered as a function thereof. Examples: In the event of an abrupt interruption or sharp reduction in the amount of steam, even though the relevant cooking zone is switched on, it can be assumed that the relevant saucepan or pan has been removed from the stove. In this case, the control or regulating device can automatically switch off the heating energy of the relevant cooking zone. With a slow reduction in the amount of steam and a corresponding decrease in the steam signals, even though the relevant cooking zone is switched on unchanged, the conclusion can be drawn that, for example, all water or fat has evaporated. The control or regulating device is preferably designed such that it detects such a slow reduction in the development of haze without the heating energy being reduced, and then switches off the relevant cooking zone. The control or regulating device can be designed in this way, e.g. be provided with electronic logic to operate at steam change rates, i.e. Change per unit of time responds.
Die Steuer- oder Regeleinrichtung der Erfindung ist vorzugsweise derart ausgebildet, daß sie in Abhängigkeit von der Anzahl der jeweils eingeschalteten Kochzonen und/oder de- ren Größe und/oder deren Leistungsstufen, der Signale der Sensoreinrichtung und, wenn sie mit der Funktion einer Dunstabzugshaube des Kochherdes kombiniert ist, den Lüfter der Dunstabzugshaube ein- oder ausschaltet und/oder steuert oder regelt. Die Steueroder Regeleinrichtung ist vorzugsweise derart ausgebildet, daß sie bei übermäßiger Dampfentwicklung die betreffende Kochzone in ihrer Leistung so lange reduziert, bis die Dampfentwicklung einem "normalen" oder "sanften" Kochen entspricht.The control or regulating device of the invention is preferably designed in such a way that it depends on the number of the cooking zones switched on and / or their size and / or their power levels, the signals from the sensor device and, if they function as an extractor hood Cooking range is combined, the fan the extractor hood switches on or off and / or controls. The control or regulating device is preferably designed in such a way that, in the event of excessive steam development, it reduces the performance of the cooking zone in question until the steam development corresponds to "normal" or "gentle" cooking.
Ferner kann die Steuer- oder Regeleinrichtung der Erfindung derart ausgebildet sein, daß sie mehrere Kochzonen eines Kochfeldes oder auch mehrere Kochfelder überwacht. Hierbei kann die Steuer- oder Regeleinrichtung derart ausgebildet sein, daß sie, wenn mehrere Kochzonen gleichzeitig eingeschaltet sind, durch "testweises" Reduzieren der Heizenergie von mehreren Kochzonen nacheinander die Kochzone heraussucht, welche zu stark erhitzt wird. Diese Entscheidung, welche von der Steuer- oder Regeleinrichtung getroffen wird, kann auch schon durch Verfolgen der zeitlichen Entwicklung der Signale vom Zeitpunkt des Einschaltens der betreffenden Kochzone an getroffen werden, beispielsweise durch Messen der zeitlich abhängigen Dampfentwicklung oder Temperatu- rentwicklung des Dampfes und gegebenenfalls auch der zeitlich abhängigen Heizleistung. Weitere Betriebsgrößen und Kriterien, welche von der Steuer- oder Regeleinrichtung automatisch berücksichtigt werden können, können die jeweils manuell eingeschaltete Heizleistung der Kochzonen und die Größe der Kochzonen, die Zeitdauer vom Einschalten einer Kochzone bis zur Entwicklung einer bestimmten Dampfmenge oder bis zum Ausbleiben einer Dampfentwicklung, oder ein schnelles oder langsames Abfallen der Dampfentwicklung bzw. der damit verbundenen Dampfkriterien wie beispielsweise Dampftemperatur und/oder Dampfdichte sein.Furthermore, the control or regulating device of the invention can be designed in such a way that it monitors several cooking zones of a cooktop or also several cooktops. Here, the control or regulating device can be designed in such a way that when several cooking zones are switched on at the same time, by "test-wise" reduction of the heating energy from several cooking zones, it consecutively looks for the cooking zone which is overheated. This decision, which is made by the control or regulating device, can also be made by following the development of the signals over time from the time the relevant cooking zone is switched on, for example by measuring the time-dependent steam development or temperature development of the steam and, if appropriate, also the time-dependent heating output. Other operating parameters and criteria that can be automatically taken into account by the control or regulating device can include the manually switched on heating output of the cooking zones and the size of the cooking zones, the time from switching on a cooking zone to the development of a certain amount of steam or until there is no steam development, or a rapid or slow decrease in the steam development or the steam criteria associated therewith, such as steam temperature and / or steam density.
Die Erfindung wird im folgenden mit Bezug auf die Zeichnung anhand einer bevorzugten Ausführungsform als Beispiel beschrieben. In der Zeichnung zeigtThe invention is described below with reference to the drawing using a preferred embodiment as an example. In the drawing shows
Fig. 1 schematisch eine Vorderansicht einer Steuer- oder Regeleinrichtung eines Kochherdes nach der Erfindung in Kombination mit einer über dem Kochfeld des Kochherdes angeordneten Dampfabzugshaube.Fig. 1 shows schematically a front view of a control or regulating device of a cooker according to the invention in combination with a steam extractor hood arranged above the hob of the cooker.
Fig. 1 zeigt einen Elektroherd 2 mit beispielsweise vier Kochzonen 4 in einem Kochfeld 6. Jede Kochzone 4 enthält unter einer Keramikplatte 8 mindestens einen elektrischen Heizkörper, welcher durch ein manuelles Bedienelement 10 auf der Herdfrontseite manuell ein- und ausschaltbar und auf eine gewünschte Heizenergie schrittweise oder stufenlos einstellbar ist. Der Herd kann einen Backofen 12 enthalten. Über dem Herd ist eine Dunstabzugshaube 20 angeordnet, welche sich im wesentlichen über alle Kochzonen 4 erstreckt. Die Dunstabzugshaube 20 enthält einen Lüfter 22 und vor diesem im Dampfabzugsweg einen Dampffilter 24 über einem Gitter 26.1 shows an electric cooker 2 with, for example, four cooking zones 4 in a cooktop 6. Each cooking zone 4 contains, under a ceramic plate 8, at least one electric heating element, which can be switched on and off manually by a manual control element 10 on the front of the cooker and gradually to a desired heating energy or is continuously adjustable. The cooker may include an oven 12. An extractor hood 20 is arranged above the stove and extends essentially over all cooking zones 4. The extractor hood 20 contains a fan 22 and a steam filter 24 in front of it in the steam exhaust path above a grille 26.
Eine Steuer- oder Regeleinrichtung 30 registriert den von den Kochzonen 4 aufsteigenden Dampf beim Garen von Gargut (Speisen) und beim Kochen von Flüssigkeiten wie beispielsweise Suppe, Gemüse oder Wasser, und limitiert, steuert oder regelt in Abhängigkeit von dem registrierten Dampf die Heizenergie der Kochzonen 4.A control or regulating device 30 registers the steam rising from the cooking zones 4 when cooking food (food) and when cooking liquids such as soup, vegetables or water, and limits, controls or regulates the heating energy of the cooking zones depending on the registered steam 4th
Die Steuer- oder Regeleinrichtung 30 kann an oder im Kochherd 2 oder an oder in der Dunstabzugshaube 20 angeordnet sein. Die Steuer- oder Regeleinrichtung ist an eine Sensoreinrichtung 32 funktionsmäßig angeschlossen, welche im Dampf-Abzugsweg der Kochzonen 4 angeordnet ist, vorzugsweise an oder in der Dunstabzugshaube 20. Die Sensoreinrichtung 32 erzeugt in Abhängigkeit von dem registrierten Dampf ein Signal, beispielsweise in Abhängigkeit von der Dampfdichte, der Dampf-Strömungsgeschwindigkeit, der Dampftemperatur und/oder anderen Dampf-Werten. In Abhängigkeit von dem Sensorsignal können in der Steuer- oder Regeleinrichtung 30 jeweils eine oder mehrere von folgenden oder weiteren Funktionen vorgesehen sein: Abschalten oder Reduzieren der Heizenergie der betreffenden Kochzone 4 bei Überschreiten eines vorbestimmten Grenzwertes und wieder Einschalten der Heizenergie bei Rückgang des betreffenden Dampfwertes unter den Grenzwert; Regeln der Heizenergie der betreffenden Kochzone in Abhängigkeit von einem vorbestimmten Sollwert, welcher ein Festwert oder ein in Abhängigkeit vom manuellen Einstellelement 10 ein- stellbarer variabler Sollwert sein kann; Schaltvorgänge, Steuer- oder Regelvorgänge in Abhängigkeit von der Zeitdauer, innerhalb welcher Veränderungen des Dampfes von der Sensoreinrichtung 32 registriert werden, beispielsweise vollständiges Abschalten der Heizenergie der betreffenden Kochzone 4 bei plötzlichem Ausbleiben der Dampf-Signale oder wenn der registrierte Dampfwert unter einen vorbestimmten Wert innerhalb einer kurzen Zeit abfällt, beispielsweise weil ein Kochtopf oder eine Pfanne von der betreffenden Kochzone weggenommen wurde, oder bei langsamem Abnehmen der Dampfentwicklung, jeweils bei unverändert gebliebener Einstellung der Heizenergie an dem manuellen Bedienelement 10, weil dies ein Zeichen dafür sein könnte, daß alles Wasser oder Fett verdampft ist und deshalb die Gefahr eines An- brennens von Speisen und damit auch Feuergefahr besteht. Die Steuer- oder Rege- leinrichtung 30 kann derart ausgebildet sein, daß sie Dampfänderungen pro Zeiteinheit erkennt, nicht nur Dampfänderungen an sich.The control or regulating device 30 can be arranged on or in the cooker 2 or on or in the extractor hood 20. The control or regulating device is functionally connected to a sensor device 32 which is arranged in the steam extraction path of the cooking zones 4, preferably on or in the extractor hood 20. The sensor device 32 generates a signal depending on the registered steam, for example depending on the Vapor density, steam flow rate, steam temperature and / or other steam values. Depending on the sensor signal, one or more of the following or further functions can be provided in the control or regulating device 30: switching off or reducing the heating energy of the relevant cooking zone 4 when a predetermined limit value is exceeded and switching on the heating energy again when the relevant steam value drops below the limit; Regulating the heating energy of the relevant cooking zone as a function of a predetermined target value, which can be a fixed value or a variable target value that can be set as a function of the manual setting element 10; Switching, control or regulating processes depending on the time period within which changes in the steam are registered by the sensor device 32, for example complete switching off of the heating energy of the cooking zone 4 in question if the steam signals suddenly fail to appear or if the registered steam value falls below a predetermined value a short time, for example because a saucepan or pan has been removed from the cooking zone in question, or with a slow decrease in steam generation, in each case with the heating energy setting on the manual control element 10 remaining unchanged, because this could be a sign that all water or fat has evaporated and therefore there is a risk of food burning and thus a fire hazard. The tax or regulatory Oil device 30 can be designed such that it detects changes in steam per unit of time, not only changes in steam per se.
Die Steuer- oder Regeleinrichtung 30 kann mit einer Alarmeinrichtung zur Erzeugung eines Alarmsignales ausgebildet sein, wenn sie erkennt, daß in ihr vorgegebene Sicherheitskriterien überschritten werden.The control or regulating device 30 can be designed with an alarm device for generating an alarm signal if it recognizes that the predetermined safety criteria are exceeded in it.
Die Sensorvorrichtung 32 kann eine Ultraschall-Meßstrecke quer durch den Dampfweg mit einem Ultraschallsender 31 und einem Ultraschallempfänger 33 aufweisen.The sensor device 32 can have an ultrasound measuring section across the steam path with an ultrasound transmitter 31 and an ultrasound receiver 33.
Für jede Kochzone 4 kann eine eigene Steuer- oder Regeleinrichtung 30 und/oder eine eigene Sensoreinrichtung 32 vorgesehen sein. Gemäß anderer Ausführungsform kann über jeder Kochzone 4 eine ihr zugeordnete Sensoreinrichtung 32 in deren Dampfströmungsweg angeordnet sein, welche alle an eine ihnen gemeinsame Steuer- oder Regeleinrichtung 30 elektrisch angeschlossen sind. Gemäß einer anderen Ausführungsform kann für mehrere Kochzonen 4 eine ihnen gemeinsame Sensoreinrichtung 32 und eine ihnen gemeinsame Steuer- oder Regeleinrichtung 30 vorgesehen sein. In letzterem Falle ist die Steuer- oder Regeleinrichtung 30 je nach Ausführungsform derart ausgebildet, daß sie entweder nacheinander die Heizenergie der Koch- stellen reduziert, bis sie erkennt, welche Kochstelle für die zu starke Dampfentwicklung verantwortlich ist, und dann nur deren Heizenergie entsprechend reduziert, jedoch die Einstellung der Heizenergie der anderen Kochstellen auf dem am Bedienelement 10 eingestellten Wert beläßt; oder die Steuer- oder Regeleinrichtung 30 ermittelt die für die zu starke Dampfentwicklung verantwortliche Kochstelle zusätzlich oder nur anhand von Betriebskriterien wie beispielsweise der am Bedienelement 10 eingestellten Heizenergie, dem Durchmesser der betreffenden Kochstelle und/oder der Zeitdauer, wie lange die einzelnen Kochstellen bereits eingeschaltet waren. Derartige Auswahlkriterien zur Ermittlung der betreffenden Kochzone 4, welche für die zu starke Dampfentwicklung verantwortlich ist, können auch dafür verwendet werden, festzustellen, von welcher Kochzone 4 trotz unveränderter Einstellung einer bestimmten Heizenergie am Bedienelement 10 Kochdampf plötzlich ausbleibt oder zunehmend weniger wird.A separate control or regulating device 30 and / or a separate sensor device 32 can be provided for each cooking zone 4. According to another embodiment, a sensor device 32 assigned to it can be arranged in its steam flow path above each cooking zone 4, all of which are electrically connected to a control or regulating device 30 common to them. According to another embodiment, a sensor device 32 common to them and a control device 30 common to them can be provided for several cooking zones 4. In the latter case, depending on the embodiment, the control or regulating device 30 is designed in such a way that it either successively reduces the heating energy of the hotplates until it recognizes which hotplate is responsible for the excessive steam development, and then only reduces its heating energy accordingly, however, the setting of the heating energy of the other hotplates remains at the value set on the control element 10; or the control or regulating device 30 determines the hotplate responsible for the excessive steam development additionally or only on the basis of operating criteria such as, for example, the heating energy set on the control element 10, the diameter of the hotplate concerned and / or the length of time for which the individual hotplates have already been switched on , Such selection criteria for determining the cooking zone 4 in question, which is responsible for the excessive steam development, can also be used to determine which cooking zone 4, despite the unchanged setting of a certain heating energy on the control element 10, suddenly stops cooking steam or becomes increasingly less.
Die Sensoreinrichtung 32 kann zusätzlich an eine Steuer- oder Regeleinrichtung 34 der Dunstabzugshaube 20 angeschlossen sein, um deren Lüfter 22 in Abhängigkeit von der jeweiligen Kochdampfmenge einzuschalten, abzuschalten oder auf eine be- stimmte Drehzahl zu schalten, wie dies beispielsweise aus der genannten EP 0 443 141 A2 bekannt ist.The sensor device 32 can additionally be connected to a control or regulating device 34 of the extractor hood 20 in order to switch its fan 22 on or off as a function of the respective amount of cooking steam, or to switch it to a tuned speed to switch, as is known for example from said EP 0 443 141 A2.
Die Steuer- oder Regeleinrichtung 34 des Lüfter 22 der Dunstabzugshaube 20 kann zum Schalten, Steuern und/oder Regeln der Heizenergie des Kochherdes 2 anstelle von deren Steuer- oder Regeleinrichtung 30 vorgesehen werden. The control or regulating device 34 of the fan 22 of the extractor hood 20 can be provided for switching, controlling and / or regulating the heating energy of the cooker 2 instead of its control or regulating device 30.

Claims

Patentansprüche claims
1. Steuer- oder Regeleinrichtung eines Kochherdes, der ein Kochfeld mit mindestens einer Kochzone (4) hat, dadurch geken nzeichnet, daß sie auf Kochdampf reagierend und in Abhängigkeit vom Kochdampf die Heizenergie von mindestens einer Kochzone beeinflussend ausgebildet ist.1. Control or regulating device of a cooker, which has a hob with at least one cooking zone (4), characterized geken marked in that it is designed to react to cooking steam and, depending on the cooking steam, is designed to influence the heating energy of at least one cooking zone.
2. Steuer- oder Regeleinrichtung nach Anspruch 1 , dadurch gekennzeichnet, daß sie in Abhängigkeit vom Kochdampf die Heizenergie abschaltend ausge- bildet ist, wenn ein vorbestimmter Dampfwert detektiert wird.2. Control or regulating device according to claim 1, characterized in that it is designed to switch off the heating energy as a function of the cooking steam when a predetermined steam value is detected.
3. Steuer- oder Regeleinrichtung nach Anspruch 1 , dadurch gekennzeichnet, daß sie in Abhängigkeit vom Kochdampf die Heizenergie steuernd ausgebildet ist.3. Control or regulating device according to claim 1, characterized in that it is designed to control the heating energy depending on the cooking steam.
4. Steuer- oder Regeleinrichtung nach Anspruch 1 , dadurch gekennzeichnet, daß sie in Abhängigkeit vom Kochdampf die Heizenergie regelnd ausgebildet ist.4. Control or regulating device according to claim 1, characterized in that it is designed to regulate the heating energy depending on the cooking steam.
5. Steuer- oder Regeleinrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sie auf mindestens einen der Werte "Dampfmenge/Zeit, Dampfdichte und/oder Dampftemperatur" des Kochdampfes reagierend ausgebildet ist.5. Control or regulating device according to one of the preceding claims, characterized in that it is designed to react to at least one of the values "steam quantity / time, steam density and / or steam temperature" of the cooking steam.
6. Steuer- oder Regeleinrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sie mindestens eine auf den Kochdampf reagierende Sensoreinrichtung (32) aufweist, welche mit Abstand über dem Kochfeld in dessen Dampfweg angeordnet ist.6. Control or regulating device according to one of the preceding claims, characterized in that it has at least one sensor device (32) reacting to the cooking steam, which is arranged at a distance above the hob in its steam path.
7. Steuer- oder Regeleinrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Sensoreinrichtung an einer Dampfabzugshaube (20) vorgesehen ist. 7. Control or regulating device according to claim 6, characterized in that the sensor device is provided on a steam exhaust hood (20).
Steuer- oder Regeleinrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß für mehrere in einem Kochfeld angeordnete Kochzonen (4) eine gemeinsame Sensoreinrichtung (32) vorgesehen ist, und daß Maßnahmen vorgesehen sind, durch welche bei Überschreiten eines vorbestimmten Dampfwertes anhand von vorbestimmten Betriebskriterien die Kochzone (4) automatisch ermittelt und bezüglich ihrer Heizenergie limitiert wird, welche für das Überschreiten des vorbestimmten Dampfwertes verantwortlich ist. Control or regulating device according to one of the preceding claims, characterized in that a common sensor device (32) is provided for a plurality of cooking zones (4) arranged in a hob, and in that measures are provided by which when a predetermined steam value is exceeded on the basis of predetermined operating criteria the cooking zone (4) is automatically determined and its heating energy is limited, which is responsible for exceeding the predetermined steam value.
9. Steuer- oder Regeleinrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß für mehrere in einem Kochfeld angeordnete Kochzonen (4) eine gemeinsame Sensoreinrichtung (32) vorgesehen ist und daß Maßnahmen vorgesehen sind, durch welche bei Überschreiten eines vorbe- stimmten Dampfwertes durch serielles testweises Reduzieren der Heizenergie der Kochzonen (4) nacheinander automatisch die Kochzone ermittelt wird, welche für das Überschreiten des vorbestimmten Dampfwertes verantwortlich ist.9. Control or regulating device according to one of claims 1 to 7, characterized in that a common sensor device (32) is provided for several cooking zones (4) arranged in a cooktop and that measures are provided by which when a predetermined one is exceeded Steam value is automatically determined one after the other by successively reducing the heating energy of the cooking zones (4) the cooking zone which is responsible for exceeding the predetermined steam value.
10. Steuer- oder Regeleinrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sie von den Kochfunktionen des Kochherdes manuell wahlweise abschaltbar und wieder hinzuschaltbar ist.10. Control device according to one of the preceding claims, characterized in that it can be manually switched off and on again by the cooking functions of the cooker.
11. Steuer- oder Regeleinrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sie eine vom Kochdampf abhängige Sicher- heits-Abschaltfunktion aufweist, durch welche sie in Abhängigkeit von mindestens einem vorbestimmten Sicherheitskriterium die Heizenergie einer das Sicherheitskriterium überschreitenden Kochzone (4) automatisch abschaltet.11. Control or regulating device according to one of the preceding claims, characterized in that it has a safety shutdown function dependent on cooking steam, by means of which it automatically switches off the heating energy of a cooking zone (4) which exceeds the safety criterion as a function of at least one predetermined safety criterion ,
12. Steuer- oder Regeleinrichtung nach einem der Ansprüche 6 bis 1 1 , dadurch gekennzeichnet, daß sie, oder mindestens ihre Sensoreinrichtung (32), zur automatischen Betätigung eines Lüfters (22) in einer Dunstabzugshaube (20) in Abhängigkeit von Kochdampf ausgebildet ist.12. Control or regulating device according to one of claims 6 to 1 1, characterized in that it, or at least its sensor device (32), is designed for automatic actuation of a fan (22) in an extractor hood (20) as a function of cooking steam.
13. Steuer- oder Regeleinrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sie von einer Hauszentrale aus bedienbar ist. 13. Control or regulating device according to one of the preceding claims, characterized in that it can be operated from a central office.
EP00949468A 1999-08-24 2000-08-07 Cooking Zone Expired - Lifetime EP1212570B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19940123A DE19940123A1 (en) 1999-08-24 1999-08-24 Control or regulating device of a cooker
DE19940123 1999-08-24
PCT/EP2000/007648 WO2001014798A1 (en) 1999-08-24 2000-08-07 Control device for a cooker

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EP1212570A1 true EP1212570A1 (en) 2002-06-12
EP1212570B1 EP1212570B1 (en) 2005-12-21

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WO2001014798A1 (en) 2001-03-01
ATE313762T1 (en) 2006-01-15
EP1212570B1 (en) 2005-12-21
US20020129809A1 (en) 2002-09-19
DE50011919D1 (en) 2006-01-26
US6578569B2 (en) 2003-06-17

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