EP2746681B1 - Extractor hood and method for controlling the operation of an extractor hood - Google Patents

Extractor hood and method for controlling the operation of an extractor hood Download PDF

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Publication number
EP2746681B1
EP2746681B1 EP13005692.2A EP13005692A EP2746681B1 EP 2746681 B1 EP2746681 B1 EP 2746681B1 EP 13005692 A EP13005692 A EP 13005692A EP 2746681 B1 EP2746681 B1 EP 2746681B1
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EP
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Prior art keywords
cooking
extractor hood
detected
fan apparatus
detection device
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EP13005692.2A
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German (de)
French (fr)
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EP2746681A1 (en
Inventor
Bruno Fuhge
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Diehl AKO Stiftung and Co KG
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Diehl AKO Stiftung and Co KG
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    • 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 present invention relates to an extractor hood and a method for controlling the operation of an extractor hood.
  • the DE 25 18 750 B2 and the DE 39 22 090 A1 each describe an extractor hood over a cooking stove, in which the speed of an electric motor of a fan is continuously regulated as a function of a temperature of the cooking vapors.
  • the control device is brought into the standby position as soon as a hotplate of the cooker is switched on.
  • the temperature is monitored by means of at least one temperature sensor in the form of an NTC resistor in the extractor area and at least one further temperature sensor in the form of an NTC resistor on the outside of the housing of the extractor hood.
  • the EP 1 333 231 A2 describes an extractor hood over an electric stove, in which an ultrasonic sensor unit for detecting the amount of steam and controlling the fan output as a function of the amount of steam detected.
  • WO 2010/065793 A1 an exhaust air control system with an extractor hood, in which a state of a cooking appliance below the extractor hood is determined on the basis of a temperature of a cooking area of the cooking appliance and a temperature of the exhaust air and a fan of the extractor hood is switched on and its speed is controlled as a function of the particular device state.
  • the cooking vapors can also be measured using infrared sensors (cf. DE 41 05 807 A1 ), Ultrasonic sensors (cf. EP 1 001 226 B1 ), Laser sensors (cf. DE 10 2005 015 754 A1 ) or gas sensors (cf. EP 1 452 804 A1 ) can be recorded and evaluated.
  • infrared sensors cf. DE 41 05 807 A1
  • Ultrasonic sensors cf. EP 1 001 226 B1
  • Laser sensors cf. DE 10 2005 015 754 A1
  • gas sensors cf. EP 1 452 804 A1
  • the invention is based on the object of creating an improved extractor hood and an improved method for controlling the operation of an extractor hood with automatic switch-on and automatic power regulation.
  • the extractor hood of the invention has a fan device for extracting exhaust air from a cooking appliance with several cooking areas arranged under the extractor hood, a temperature detection device for detecting temperatures of the several cooking areas of the cooking appliance and a cooking vapor detection device for detecting the presence of cooking fumes in the exhaust air extracted by means of the fan device.
  • the fan device has a plurality of fans and / or air flaps to to generate separate exhaust air flows from the individual cooking areas of the cooking appliance.
  • a control device of the extractor hood is designed to switch on the fan device as a function of the temperatures detected by the temperature detection device, to control the separate exhaust air flows of the fan device as a function of the temperatures detected by the temperature detection device and to control a suction capacity of the fan device as a function of the temperatures detected by the cooking fume detection device Cooking vapors.
  • the different measures for automatically switching on the fan device and for controlling the suction power of the fan device enable a very fast and reliable reaction of the extractor hood to / to cooking vapors generated on the cooking appliance.
  • the temperature monitoring of the cooking areas of the cooking device enables the fan device to be switched on very quickly after the cooking device has been put into operation, i.e. as soon as there is a possibility that cooking vapors will develop on the cooking device.
  • Cooking vapors that arise can thus be conducted very quickly to the extractor hood and, in particular, also to its cooking vapors detection device.
  • the cooking fumes detection device can detect the cooking fumes very quickly and regulate the output of the fan device accordingly.
  • the advantages of generally only relatively coarse temperature detection of the cooking areas and relatively precise cooking vapor detection are combined with one another.
  • This extractor hood also does not require any wired or wireless coupling with the cooking appliance in order to be able to implement this automatic system, so that the extractor hood does not have to have a special interface.
  • the extractor hood and the cooking appliance can thus be designed and installed as independent devices.
  • the cooking device which is arranged under the extractor hood, is in particular a heat-generating cooking device, preferably a hob, and in particular an electronic cooking device.
  • the cooking appliance in particular has two, three, four or more cooking areas which are arranged next to one another.
  • the cooking areas correspond in particular to the hotplates or hotplates specified by the cooking appliance, but can also include two or more such hotplates or hotplates.
  • the extractor hood according to the invention has a fan device.
  • the term fan device is intended to denote any type of device which is suitable for generating an exhaust air flow from the cooking appliance under the extractor hood upwards into the extractor hood.
  • the exhaust air streams are preferably conveyed further out of the extractor hood through an exhaust air duct.
  • the fan device preferably has at least one fan, fan or the like.
  • the fan device preferably has at least one electric motor for driving the fan, ventilator, etc.
  • the electric motor of the fan device is preferably controlled by the control device of the extractor hood, i.e. in particular switched on and its speed regulated.
  • the extractor hood according to the invention also has a temperature detection device for detecting temperatures of the multiple cooking areas of the cooking appliance.
  • the temperature detection device is part of the extractor hood and is integrated into it or connected to it, so that the extractor hood does not require an interface to the cooking appliance.
  • the temperature detection device is designed in particular to detect the temperatures of all cooking areas of the cooking appliance.
  • the temperature detection device preferably has one, two, three, four or more temperature sensors for detecting a temperature of a cooking area of the cooking appliance. These temperature sensors are preferably arranged outside or at least in an edge region of an exhaust air flow on the extractor hood.
  • the temperature detection device preferably also has one, two, three, four or more temperature sensors for detecting an ambient temperature of the extractor hood.
  • the temperature detection device is designed to separately detect the temperatures of several cooking areas of the cooking appliance
  • the fan device is designed to generate separate exhaust air flows from the individual cooking areas of the cooking appliance
  • the control device is designed to control the separate exhaust air flows of the fan device as a function of the temperatures detected by the temperature detection device.
  • the control device of the extractor hood switches on the fan device of the extractor hood as a function of a temperature detected by this temperature detection device.
  • this should include, in particular, a dependence on a temperature value of a cooking area, an average temperature value of all cooking areas, a maximum temperature value of all cooking areas, a temporal temperature gradient of one of the aforementioned temperature values, a difference value between one of the aforementioned temperature values and an ambient temperature of the extractor hood, a temporal temperature gradient one of the aforementioned difference values and the like can be understood.
  • the control device switches on the fan device in particular as soon as the respective measured value reaches or exceeds a predetermined threshold value, preferably reaches or exceeds it for at least a predetermined period of time.
  • the extractor hood according to the invention has a cooking fume detection device for detecting cooking fumes in the exhaust air extracted by means of the fan device.
  • the cooking vapor detection device preferably has one, two, three or more cooking vapor detection sensors. These cooking vapor detection sensors can be connected upstream and / or downstream of the fan device in the exhaust air flow. These cooking vapor detection sensors can also be connected upstream and / or downstream of a filter device, if present, in the exhaust air flow.
  • the term cooking vapor detection sensor is intended to denote any type of device which is suitable for detecting the presence and in particular also the amount and / or the type of cooking vapors. Suitable cooking vapor detection sensors include, in particular, infrared sensors, ultrasonic sensors, laser sensors, gas sensors and similar sensors.
  • the control device of the extractor hood controls a suction power of the fan device as a function of cooking fumes detected by the cooking vapor detection device.
  • the suction power of the fan device is preferably controlled continuously or in predetermined power levels.
  • controlling the suction power includes, in particular, upshifting, downshifting and keeping the suction power or the power level of the fan device constant.
  • the suction powers or power levels of the fan device are preferably controlled by controlling the speed of an electric motor and / or a fan of the fan device.
  • the temperature detection device has at least one infrared sensor for detecting a temperature of at least one cooking area of the cooking appliance.
  • the contactless temperature detection of the infrared sensor is a particularly simple and at the same time sufficiently accurate measurement method.
  • the accuracy of the Temperature detection of the cooking area is sufficient for the extractor hood of the invention, since the temperature detection is only intended to trigger the fan device to be switched on, but not to regulate the suction power as required.
  • the control device is designed to switch the fan device on at a low power level as a function of a temperature detected by the temperature detection device.
  • a low power level As a function of a temperature, the above statements apply accordingly. Switching on the fan device at a low power level initially only causes low energy consumption and low noise. Only when cooking vapors are actually detected in the extracted exhaust air with the aid of the cooking fume detection device is the fan device switched up.
  • the low power level corresponds in particular to a lowest power level of the fan device.
  • control device is designed to switch off the fan device as a function of temperatures detected by the temperature detection device, as a function of cooking fumes detected by the cooking evaporation device, time-dependent and / or by manual operation.
  • the extractor hood is additionally equipped with an operating device by means of which a user can switch on the fan device manually and / or manually select the power levels of the fan device.
  • the method according to the invention for controlling the operation of an extractor hood which is arranged above a cooking appliance with a plurality of cooking areas, contains the steps of separately recording temperatures of the multiple cooking areas of the cooking appliance; switching on a fan device as a function of the detected temperature; detecting the presence of cooking vapors in the exhaust air extracted by means of the fan device; the control of separate exhaust air flows of the fan device from individual cooking areas of the cooking appliance by means of several fans and / or air flaps of the fan device as a function of the detected temperatures; and controlling a suction power of the fan device as a function of the detected cooking vapors.
  • the fan device is switched on at a low power level as a function of a detected temperature.
  • the fan device of the extractor hood is switched off as a function of the recorded temperatures of the several cooking areas of the cooking appliance, as a function of recorded cooking vapors, time-dependent and / or by manual operation.
  • Figure 1 an exemplary embodiment of a range hood according to the present invention is illustrated by way of example.
  • the extractor hood 14 is arranged in the usual manner above a hob 10 with a plurality of hotplates 12.
  • the hotplates 12 can have the same or different sizes and shapes.
  • the hotplates 12 can be operated independently of one another, i.e. switched on individually and their heating output regulated.
  • each of the total of four hotplates 12 simultaneously forms a cooking area within the meaning of the invention.
  • two hotplates 12 can be combined to form one cooking area.
  • the extractor hood 14 has a fan device 16 with a fan in an exhaust air duct 17.
  • the fan is driven by an electric motor (not shown) of the fan device 16.
  • the driven fan generates an exhaust air flow from the cooking areas 12 of the hob 10 upwards into the extractor hood 14 and further into the exhaust air duct 17.
  • the exhaust air is, for example, led directly out of a building or passed on into an exhaust air system via the exhaust air duct 17.
  • a filter device (not shown) is arranged on the underside of the extractor hood facing the hotplates 12.
  • the filter device is, for example, detachably mounted so that it can be replaced or cleaned if necessary.
  • infrared sensors 18 are arranged in the area of the lower edge of the extractor hood 14.
  • the four infrared sensors together form a temperature detection device within the meaning of the invention.
  • the infrared sensors 18 are each designed and aligned in order to detect a temperature of a hotplate 12 of the hob 10. They are preferably positioned in the peripheral edge area of the extractor hood 14 and thus as far as possible outside of the exhaust air flow. If a hotplate 12 is in operation taken, the temperature of the hotplate 12 and of the cookware positioned thereon increases, which can be detected by the infrared sensors 18.
  • additional temperature sensors can be provided on the extractor hood 14, which detect the temperature of the surroundings of the extractor hood.
  • At least one cooking vapor sensor 20 for example in the form of an ultrasonic sensor, an infrared sensor, a laser sensor or the like, is arranged in the extractor hood 14 in the exhaust air flow in front of the fan of the fan device 16.
  • This at least one cooking fume sensor 20 is intended to detect the presence and concentration of cooking fumes in the exhaust air flow from the extractor hood 14.
  • At least one further cooking vapor sensor 22 is arranged in the exhaust air duct 17 of the extractor hood 14 in the exhaust air flow downstream of the fan of the fan device 16.
  • This at least one further cooking vapors sensor 22 is intended to detect the composition of cooking vapors in the exhaust air flow from the extractor hood 14.
  • the at least one cooking vapor sensor 20 and the at least one further cooking vapor sensor 22 form a cooking vapor detection device of the invention.
  • this cooking vapor detection device can also have only the at least one cooking vapor sensor 20 or only the at least one further cooking vapor sensor 22.
  • the at least one cooking vapor sensor 20 and the at least one further cooking vapor sensor 22 are also connected to the control device 24 of the extractor hood 14.
  • the control device 24 of the extractor hood 14 controls the fan device 16 as a function of the received measurement signals from the temperature detection device and the cooking vapor detection device as follows.
  • the infrared sensors 18 monitor the temperatures of the cooking zones 12 of the hob 10.
  • the temperature values detected by the infrared sensors 18 are each indicated in the control device 24 with a specified threshold value compared. If a temperature value reaches this predetermined threshold value, the control device 24 switches on the electric motor of the fan device 16 at a low power level.
  • the predefined threshold value for the temperature is here well above room temperature; it is, for example, 40 ° C, 45 ° C, 50 ° C, 55 ° C, 60 ° C or more.
  • a mean temperature value of all hotplates 12, a maximum temperature value of all hotplates 12, a difference value between the temperature of one hotplate 12 and an ambient temperature a difference value between the mean temperature of all hotplates 12 and a middle one can be used Ambient temperature, a difference value between the maximum temperature of all hotplates 12 and a mean or maximum ambient temperature or the like can be compared with a corresponding predetermined threshold value.
  • a difference value between the maximum temperature of all hotplates 12 and a mean or maximum ambient temperature or the like can be compared with a corresponding predetermined threshold value.
  • the fan device 16 is preferably only switched on by the control device 24 when the predetermined threshold value is reached or exceeded for a predetermined period of time. In this way, for example, measurement errors can be compensated for and constant switching on and off of the fan device 16 in the limit range of the threshold value can be avoided.
  • the fan device 16 If the fan device 16 is now switched on at a low power level, it generates a weak exhaust air flow from the cooking areas 12 upwards into the extractor hood 14. The sensors 20, 22 of the cooking vapor detection device then detect cooking vapors in this exhaust air flow. If no cooking vapors are present or detectable in the exhaust air flow, the fan device 16 continues to operate at a low power level.
  • the control device 24 controls the suction power of the fan device 16 or the speed of the electric motor of the fan in accordance with the detected cooking vapors, for example continuously or in predetermined power levels.
  • the suction power is increased, decreased or kept essentially constant in accordance with the measured values of the cooking vapor detection device.
  • the extractor hood 14 can optionally also be equipped with an operating device. This operating device is then also connected to the control device 2 4. Using the operating device, a user can manually switch on the fan device 16 if necessary and set its power level manually. The manual operation of the extractor hood 14 may have priority over the automatic control described above.
  • control device 24 can control the fan device 16 of the extractor hood 14 switch off again, for example, when the sensors 20, 22 of the cooking fumes detection device no longer detect cooking fumes, when the temperature detected by the infrared sensors 18 of the temperature detection device falls below the specified threshold value again, by manual actuation of a corresponding operating device by a user Reaching a predetermined operating time of the fan device 16 and the like. Combinations of these conditions are of course also conceivable and the respective conditions must preferably be fulfilled for a predetermined period of time.
  • the temperature detection device is designed in such a way that it can detect the temperatures of the individual hotplates 12 of the hob 10 separately.
  • an exhaust air flow can be generated primarily from the cooking area 12 used in each case.
  • the fan device 16 has a plurality of fans and / or air flaps which can be activated by the control device 24.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ventilation (AREA)

Description

Die vorliegende Erfindung betrifft eine Dunstabzugshaube und ein Verfahren zum Steuern des Betriebs einer Dunstabzugshaube.The present invention relates to an extractor hood and a method for controlling the operation of an extractor hood.

Es sind im Stand der Technik verschiedene Maßnahmen zum Einschalten und zur Leistungsregelung einer Lüftervorrichtung einer Dunstabzugshaube bekannt. Neben einem manuellen Einschalten und Auswählen einer Leistungsstufe über eine geeignete Bedienvorrichtung an der Dunstabzugshaube sind insbesondere verschiedene automatische Steuerungsverfahren bekannt.Various measures for switching on and regulating the output of a fan device of an extractor hood are known in the prior art. In addition to manually switching on and selecting a power level using a suitable operating device on the extractor hood, various automatic control methods are known in particular.

Die DE 25 18 750 B2 und die DE 39 22 090 A1 beschreiben jeweils eine Dunstabzugshaube über einem Kochherd, bei welcher eine Drehzahl eines Elektromotors eines Ventilators in Abhängigkeit von einer Temperatur der Kochdünste stufenlos geregelt wird. Die Steuereinrichtung wird hierzu in Bereitschaftsstellung gebracht, sobald eine Kochplatte des Kochherdes eingeschaltet wird. Die Temperaturüberwachung erfolgt mittels wenigstens eines Temperaturfühlers in Form eines NTC-Widerstandes im Dunstabzugsbereich und wenigstens eines weiteren Temperaturfühlers in Form eines NTC-Widerstandes außen am Gehäuse der Dunstabzugshaube. Die EP 1 333 231 A2 beschreibt eine Dunstabzugshaube über einem Elektroherd, bei welcher eine Ultraschall-Sensoreinheit zum Erfassen einer Dampfmenge und Steuern der Lüfterleistung in Abhängigkeit von der erfassten Dampfmenge.The DE 25 18 750 B2 and the DE 39 22 090 A1 each describe an extractor hood over a cooking stove, in which the speed of an electric motor of a fan is continuously regulated as a function of a temperature of the cooking vapors. For this purpose, the control device is brought into the standby position as soon as a hotplate of the cooker is switched on. The temperature is monitored by means of at least one temperature sensor in the form of an NTC resistor in the extractor area and at least one further temperature sensor in the form of an NTC resistor on the outside of the housing of the extractor hood. The EP 1 333 231 A2 describes an extractor hood over an electric stove, in which an ultrasonic sensor unit for detecting the amount of steam and controlling the fan output as a function of the amount of steam detected.

In der DE 39 09 125 A1 , auf welcher die Oberbegriffe der unabhängigen Ansprüche basieren, wird vorgeschlagen, die bei den Kochplatten herrschenden Temperaturen mittels mehrerer Infrarotdetektoren zu erfassen und ein Absauggebläse der Dunstabzugshaube in Abhängigkeit von den erfassten Temperaturen einzuschalten und in seiner Drehzahl zu regeln.In the DE 39 09 125 A1 , on which the preambles of the independent claims are based, it is proposed to detect the temperatures prevailing at the hotplates by means of several infrared detectors and to switch on a suction fan of the extractor hood as a function of the detected temperatures and to regulate its speed.

Weiter offenbart die WO 2010/065793 A1 ein Abluftsteuersystem mit einer Dunstabzugshaube, bei welchem ein Zustand eines Kochgeräts unterhalb der Dunstabzugshaube anhand einer Temperatur eines Kochbereichs des Kochgerätes und einer Temperatur der Abluft bestimmt wird und ein Lüfter der Dunstabzugshaube in Abhängigkeit von dem bestimmten Gerätezustand eingeschaltet und in seiner Drehzahl gereglt wird.Further reveals the WO 2010/065793 A1 an exhaust air control system with an extractor hood, in which a state of a cooking appliance below the extractor hood is determined on the basis of a temperature of a cooking area of the cooking appliance and a temperature of the exhaust air and a fan of the extractor hood is switched on and its speed is controlled as a function of the particular device state.

Zum Zwecke der Regelung der Leistungsstufe des Ventilatormotors einer Dunstabzugshaube können die Kochdünste außerdem mittels Infrarot-Sensoren (vgl. DE 41 05 807 A1 ), Ultraschallsensoren (vgl. EP 1 001 226 B1 ), Lasersensoren (vgl. DE 10 2005 015 754 A1 ) oder Gassensoren (vgl. EP 1 452 804 A1 ) erfasst und ausgewertet werden.For the purpose of regulating the power level of the fan motor of an extractor hood, the cooking vapors can also be measured using infrared sensors (cf. DE 41 05 807 A1 ), Ultrasonic sensors (cf. EP 1 001 226 B1 ), Laser sensors (cf. DE 10 2005 015 754 A1 ) or gas sensors (cf. EP 1 452 804 A1 ) can be recorded and evaluated.

Der Erfindung liegt die Aufgabe zugrunde, eine verbesserte Dunstabzugshaube und ein verbessertes Verfahren zum Steuern des Betriebs einer Dunstabzugshaube mit einem automatischen Einschalten und einer automatischen Leistungsregelung zu schaffen.The invention is based on the object of creating an improved extractor hood and an improved method for controlling the operation of an extractor hood with automatic switch-on and automatic power regulation.

Diese Aufgabe wird gelöst durch eine Dunstabzugshaube mit den Merkmalen des Anspruchs 1 bzw. ein Verfahren zum Steuern des Betriebs einer Dunstabzugshaube mit den Merkmalen des Anspruchs 5. Besonders bevorzugte Ausgestaltungen und Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.This object is achieved by an extractor hood with the features of claim 1 or a method for controlling the operation of an extractor hood with the features of claim 5. Particularly preferred embodiments and developments of the invention are the subject of the subclaims.

Die Dunstabzugshaube der Erfindung weist eine Lüftervorrichtung zum Absaugen von Abluft eines unter der Dunstabzugshaube angeordneten Kochgerätes mit mehreren Kochbereichen, eine Temperaturerfassungseinrichtung zum Erfassen von Temperaturen der mehreren Kochbereiche des Kochgerätes und eine Kochdunsterfassungseinrichtung zum Erfassen des Vorhandenseins von Kochdünsten in der mittels der Lüftervorrichtung abgesaugten Abluft auf. Die Lüftervorrichtung weist mehrere Ventilatoren und/oder Luftklappen auf, um separate Abluftströme von den einzelnen Kochbereichen des Kochgerätes zu erzeugen. Eine Steuereinrichtung der Dunstabzugshaube ist ausgebildet zum Einschalten der Lüftervorrichtung in Abhängigkeit von den durch die Temperaturerfassungseinrichtung erfassten Temperaturen, zum Steuern der separaten Abluftströme der Lüftervorrichtung in Abhängigkeit von den durch die Temperaturerfassungsvorrichtung erfassten Temperaturen und zum Steuern einer Absaugleistung der Lüftervorrichtung in Abhängigkeit von durch die Kochdunsterfassungseinrichtung erfassten Kochdünsten.The extractor hood of the invention has a fan device for extracting exhaust air from a cooking appliance with several cooking areas arranged under the extractor hood, a temperature detection device for detecting temperatures of the several cooking areas of the cooking appliance and a cooking vapor detection device for detecting the presence of cooking fumes in the exhaust air extracted by means of the fan device. The fan device has a plurality of fans and / or air flaps to to generate separate exhaust air flows from the individual cooking areas of the cooking appliance. A control device of the extractor hood is designed to switch on the fan device as a function of the temperatures detected by the temperature detection device, to control the separate exhaust air flows of the fan device as a function of the temperatures detected by the temperature detection device and to control a suction capacity of the fan device as a function of the temperatures detected by the cooking fume detection device Cooking vapors.

Bei dieser Dunstabzugshaube erfolgen sowohl das Einschalten der Lüftervorrichtung als auch das Steuern der Absaugleistung der Lüftervorrichtung automatisch.With this extractor hood, both the switching on of the fan device and the control of the suction power of the fan device take place automatically.

Die unterschiedlichen Maßnahmen zum automatischen Einschalten der Lüftervorrichtung und zum Steuern der Absaugleistung der Lüftervorrichtung ermöglichen eine sehr schnelle und zuverlässige Reaktion der Dunstabzugshaube auf/an am Kochgerät entstehende Kochdünste. Die Temperaturüberwachung der Kochbereiche des Kochgerätes ermöglicht ein sehr schnelles Einschalten der Lüftervorrichtung, nachdem das Kochgerät in Betrieb genommen worden ist, d.h. sobald die Möglichkeit besteht, dass an dem Kochgerät Kochdünste entstehen. Entstehende Kochdünste können somit sehr rasch zur Dunstabzugshaube und insbesondere auch zu deren Kochdunsterfassungseinrichtung geleitet werden. Die Kochdunsterfassungseinrichtung kann auf diese Weise die Kochdünste sehr schnell erfassen und eine entsprechende Leistungsregelung der Lüftervorrichtung bewirken. Mit anderen Worten werden in der erfindungsgemäßen Dunstabzugshaube die Vorteile einer in der Regel nur relativ groben Temperaturerfassung der Kochbereiche und einer relativ genauen Kochdunsterfassung miteinander kombiniert.The different measures for automatically switching on the fan device and for controlling the suction power of the fan device enable a very fast and reliable reaction of the extractor hood to / to cooking vapors generated on the cooking appliance. The temperature monitoring of the cooking areas of the cooking device enables the fan device to be switched on very quickly after the cooking device has been put into operation, i.e. as soon as there is a possibility that cooking vapors will develop on the cooking device. Cooking vapors that arise can thus be conducted very quickly to the extractor hood and, in particular, also to its cooking vapors detection device. In this way, the cooking fumes detection device can detect the cooking fumes very quickly and regulate the output of the fan device accordingly. In other words, in the extractor hood according to the invention, the advantages of generally only relatively coarse temperature detection of the cooking areas and relatively precise cooking vapor detection are combined with one another.

Auch erfordert diese Dunstabzugshaube keine leitungsgebundene oder drahtlose Kopplung mit dem Kochgerät, um diese Automatik realisieren zu können, sodass die Dunstabzugshaube über keine spezielle Schnittstelle verfügen muss. Die Dunstabzugshaube und das Kochgerät können somit als voneinander unabhängige Geräte konzipiert und installiert werden.This extractor hood also does not require any wired or wireless coupling with the cooking appliance in order to be able to implement this automatic system, so that the extractor hood does not have to have a special interface. The The extractor hood and the cooking appliance can thus be designed and installed as independent devices.

Bei dem Kochgerät, welches unter der Dunstabzugshaube angeordnet ist, handelt es sich insbesondere um ein Wärme erzeugendes Kochgerät, vorzugsweise um ein Kochfeld, und insbesondere um ein elektronisches Kochgerät. Das Kochgerät weist insbesondere zwei, drei, vier oder mehr Kochbereiche auf, welche nebeneinander angeordnet sind. Die Kochbereiche entsprechen dabei insbesondere den durch das Kochgerät vorgegebenen Kochstellen oder Kochplatten, können aber auch zwei oder mehr solcher Kochstellen oder Kochplatten umfassen.The cooking device, which is arranged under the extractor hood, is in particular a heat-generating cooking device, preferably a hob, and in particular an electronic cooking device. The cooking appliance in particular has two, three, four or more cooking areas which are arranged next to one another. The cooking areas correspond in particular to the hotplates or hotplates specified by the cooking appliance, but can also include two or more such hotplates or hotplates.

Die erfindungsgemäße Dunstabzugshaube weist eine Lüftervorrichtung auf. Der Begriff Lüftervorrichtung soll in diesem Zusammenhang jede Art von Vorrichtung bezeichnen, die geeignet ist, einen Abluftstrom von dem Kochgerät unter der Dunstabzugshaube nach oben in die Dunstabzugshaube hinein zu erzeugen. Die Abluftströme werden vorzugsweise durch einen Abluftkanal weiter aus der Dunstabzugshaube wieder heraus befördert. Die Lüftervorrichtung weist vorzugsweise wenigstens einen Lüfter, Ventilator oder dergleichen auf. Die Lüftervorrichtung weist vorzugsweise wenigstens einen Elektromotor zum Antreiben des Lüfters, Ventilators, etc. auf. Der Elektromotor der Lüftervorrichtung wird vorzugsweise von der Steuereinrichtung der Dunstabzugshaube angesteuert, d.h. insbesondere eingeschaltet und in seiner Drehzahl geregelt.The extractor hood according to the invention has a fan device. In this context, the term fan device is intended to denote any type of device which is suitable for generating an exhaust air flow from the cooking appliance under the extractor hood upwards into the extractor hood. The exhaust air streams are preferably conveyed further out of the extractor hood through an exhaust air duct. The fan device preferably has at least one fan, fan or the like. The fan device preferably has at least one electric motor for driving the fan, ventilator, etc. The electric motor of the fan device is preferably controlled by the control device of the extractor hood, i.e. in particular switched on and its speed regulated.

Die erfindungsgemäße Dunstabzugshaube weist weiter eine Temperaturerfassungseinrichtung zum Erfassen von Temperaturen der mehreren Kochbereiche des Kochgerätes auf. D.h. die Temperaturerfassungseinrichtung ist Bestandteil der Dunstabzugshaube und in diese integriert oder mit dieser verbunden, sodass die Dunstabzugshaube keine Schnittstelle zum Kochgerät benötigt. Die Temperaturerfassungseinrichtung ist insbesondere ausgebildet, um die Temperaturen aller Kochbereiche des Kochgerätes zu erfassen. Die Temperaturerfassungseinrichtung weist vorzugsweise einen, zwei, drei, vier oder mehr Temperatursensoren zum Erfassen einer Temperatur eines Kochbereichs des Kochgerätes auf. Diese Temperatursensoren sind vorzugsweise außerhalb oder zumindest in einem Randbereich eines Abluftstroms an der Dunstabzugshaube angeordnet. Darüber hinaus weist die Temperaturerfassungseinrichtung vorzugsweise auch einen, zwei, drei, vier oder mehr Temperatursensoren zum Erfassen einer Umgebungstemperatur der Dunstabzugshaube auf.The extractor hood according to the invention also has a temperature detection device for detecting temperatures of the multiple cooking areas of the cooking appliance. In other words, the temperature detection device is part of the extractor hood and is integrated into it or connected to it, so that the extractor hood does not require an interface to the cooking appliance. The temperature detection device is designed in particular to detect the temperatures of all cooking areas of the cooking appliance. The temperature detection device preferably has one, two, three, four or more temperature sensors for detecting a temperature of a cooking area of the cooking appliance. These temperature sensors are preferably arranged outside or at least in an edge region of an exhaust air flow on the extractor hood. In addition, the temperature detection device preferably also has one, two, three, four or more temperature sensors for detecting an ambient temperature of the extractor hood.

Gemäß der Erfindung ist die Temperaturerfassungseinrichtung ausgebildet, um die Temperaturen mehrerer Kochbereiche des Kochgerätes separat zu erfassen, ist die Lüftervorrichtung ausgebildet, um separate Abluftströme von den einzelnen Kochbereichen des Kochgerätes zu erzeugen; und ist die Steuereinrichtung ausgebildet, um die separaten Abluftströme der Lüftervorrichtung in Abhängigkeit von den durch die Temperaturerfassungseinrichtung erfassten Temperaturen zu steuern. Hierdurch besteht die Möglichkeit, Abluft hauptsächlich nur von den Kochbereichen abzusaugen, an denen tatsächlich Kochdünste entstehen. Als Ergebnis können der Energieverbrauch und/oder die Geräuschentwicklung der Dunstabzugshaube reduziert werden.According to the invention, the temperature detection device is designed to separately detect the temperatures of several cooking areas of the cooking appliance, the fan device is designed to generate separate exhaust air flows from the individual cooking areas of the cooking appliance; and the control device is designed to control the separate exhaust air flows of the fan device as a function of the temperatures detected by the temperature detection device. This makes it possible to extract exhaust air mainly only from the cooking areas where cooking vapors actually arise. As a result, the energy consumption and / or the noise generated by the extractor hood can be reduced.

Die Steuereinrichtung der Dunstabzugshaube schaltet die Lüftervorrichtung der Dunstabzugshaube in Abhängigkeit von einer durch diese Temperaturerfassungseinrichtung erfassten Temperatur ein. Hierunter soll in diesem Zusammenhang insbesondere eine Abhängigkeit von einem Temperaturwert eines Kochbereichs, einem mittleren Temperaturwert aller Kochbereiche, einem maximalen Temperaturwert aller Kochbereiche, einem zeitlichen Temperaturgradienten eines der vorgenannten Temperaturwerte, einem Differenzwert zwischen einem der vorgenannten Temperaturwerte und einer Umgebungstemperatur der Dunstabzugshaube, einem zeitlichen Temperaturgradienten eines der vorgenannten Differenzwerte und dergleichen verstanden werden. Die Steuereinrichtung schaltet die Lüftervorrichtung insbesondere ein, sobald der jeweilige Messwert einen vorbestimmten Schwellenwert erreicht bzw. überschreitet, vorzugsweise für wenigstens eine vorbestimmte Zeitdauer erreicht bzw. überschreitet.The control device of the extractor hood switches on the fan device of the extractor hood as a function of a temperature detected by this temperature detection device. In this context, this should include, in particular, a dependence on a temperature value of a cooking area, an average temperature value of all cooking areas, a maximum temperature value of all cooking areas, a temporal temperature gradient of one of the aforementioned temperature values, a difference value between one of the aforementioned temperature values and an ambient temperature of the extractor hood, a temporal temperature gradient one of the aforementioned difference values and the like can be understood. The control device switches on the fan device in particular as soon as the respective measured value reaches or exceeds a predetermined threshold value, preferably reaches or exceeds it for at least a predetermined period of time.

Die erfindungsgemäße Dunstabzugshaube weist eine Kochdunsterfassungseinrichtung zum Erfassen von Kochdünsten in der mittels der Lüftervorrichtung abgesaugten Abluft auf. Die Kochdunsterfassungseinrichtung weist vorzugsweise einen, zwei, drei oder mehr Kochdunsterfassungssensoren auf. Diese Kochdunsterfassungssensoren können im Abluftstrom der Lüftervorrichtung vorgeschaltet und/oder nachgeschaltet sein. Diese Kochdunsterfassungssensoren können im Abluftstrom auch einer Filtervorrichtung, falls vorhanden, vorgeschaltet und/oder nachgeschaltet sein. Der Begriff Kochdunsterfassungssensor soll in diesem Zusammenhang jede Art einer Vorrichtung bezeichnen, welche geeignet ist, das Vorhandensein und insbesondere auch die Menge und/oder die Art von Kochdünsten zu erfassen. Zu den geeigneten Kochdunsterfassungssensoren zählen insbesondere Infrarot-Sensoren, Ultraschallsensoren, Lasersensoren, Gassensoren und dergleichen Sensoren.The extractor hood according to the invention has a cooking fume detection device for detecting cooking fumes in the exhaust air extracted by means of the fan device. The cooking vapor detection device preferably has one, two, three or more cooking vapor detection sensors. These cooking vapor detection sensors can be connected upstream and / or downstream of the fan device in the exhaust air flow. These cooking vapor detection sensors can also be connected upstream and / or downstream of a filter device, if present, in the exhaust air flow. In this context, the term cooking vapor detection sensor is intended to denote any type of device which is suitable for detecting the presence and in particular also the amount and / or the type of cooking vapors. Suitable cooking vapor detection sensors include, in particular, infrared sensors, ultrasonic sensors, laser sensors, gas sensors and similar sensors.

Die Steuereinrichtung der Dunstabzugshaube steuert eine Absaugleistung der Lüftervorrichtung in Abhängigkeit von durch die Kochdunsterfassungseinrichtung erfassten Kochdünsten. Hierunter soll in diesem Zusammenhang insbesondere eine Abhängigkeit von einer Kochdunstmenge, Kochdunstzusammensetzung, Kochdunsttemperatur, Kochdunstart, etc. verstanden werden. Die Steuerung der Absaugleistung der Lüftervorrichtung erfolgt vorzugsweise stufenlos oder in vorgegebenen Leistungsstufen. Das Steuern der Absaugleistung umfasst in diesem Zusammenhang insbesondere ein Hochschalten, Herunterschalten und Konstanthalten der Absaugleistung bzw. der Leistungsstufe der Lüftervorrichtung. Die Absaugleistungen bzw. Leistungsstufen der Lüftervorrichtung werden dabei vorzugsweise durch ein Steuern der Drehzahl eines Elektromotors und/odereines Ventilators der Lüftervorrichtung gesteuert.The control device of the extractor hood controls a suction power of the fan device as a function of cooking fumes detected by the cooking vapor detection device. In this context, this is to be understood as meaning, in particular, a dependency on the amount of cooking vapor, the composition of the cooking vapor, the cooking vapor temperature, the type of cooking vapor, etc. The suction power of the fan device is preferably controlled continuously or in predetermined power levels. In this context, controlling the suction power includes, in particular, upshifting, downshifting and keeping the suction power or the power level of the fan device constant. The suction powers or power levels of the fan device are preferably controlled by controlling the speed of an electric motor and / or a fan of the fan device.

In einer bevorzugten Ausgestaltung der Erfindung weist die Temperaturerfassungseinrichtung wenigstens einen Infrarot-Sensor zum Erfassen einer Temperatur wenigstens eines Kochbereichs des Kochgerätes auf. Die berührungslose Temperaturerfassung des Infrarot-Sensors stellt eine besonders einfache und zugleich ausreichend genaue Messmethode dar. Die so erzielbare Genauigkeit der Temperaturerfassung des Kochbereichs ist für die Dunstabzugshaube der Erfindung ausreichend, da durch die Temperaturerfassung lediglich das Einschalten der Lüftervorrichtung ausgelöst werden soll, nicht jedoch eine bedarfsgenaue Regelung der Absaugleistung erfolgen soll.In a preferred embodiment of the invention, the temperature detection device has at least one infrared sensor for detecting a temperature of at least one cooking area of the cooking appliance. The contactless temperature detection of the infrared sensor is a particularly simple and at the same time sufficiently accurate measurement method. The accuracy of the Temperature detection of the cooking area is sufficient for the extractor hood of the invention, since the temperature detection is only intended to trigger the fan device to be switched on, but not to regulate the suction power as required.

In einer bevorzugten Ausgestaltung der Erfindung ist die Steuereinrichtung ausgebildet, um die Lüftervorrichtung in Abhängigkeit von einer durch die Temperaturerfassungseinrichtung erfassten Temperatur auf einer niedrigen Leistungsstufe einzuschalten. Bezüglich der Steuerung in Abhängigkeit von einer Temperatur gelten die obigen Ausführungen entsprechend. Das Einschalten der Lüftervorrichtung auf einer niedrigen Leistungsstufe verursacht zunächst nur einen geringen Energieverbrauch und geringe Geräusche. Erst wenn mit Hilfe der Kochdunsterfassungseinrichtung auch tatsächlich Kochdünste in der abgesaugten Abluft erfasst werden, wird die Lüftervorrichtung hochgeschaltet. Die niedrige Leistungsstufe entspricht insbesondere einer niedrigsten Leistungsstufe der Lüftervorrichtung.In a preferred embodiment of the invention, the control device is designed to switch the fan device on at a low power level as a function of a temperature detected by the temperature detection device. With regard to the control as a function of a temperature, the above statements apply accordingly. Switching on the fan device at a low power level initially only causes low energy consumption and low noise. Only when cooking vapors are actually detected in the extracted exhaust air with the aid of the cooking fume detection device is the fan device switched up. The low power level corresponds in particular to a lowest power level of the fan device.

In einer weiteren bevorzugten Ausgestaltung der Erfindung ist die Steuereinrichtung ausgebildet, um die Lüftervorrichtung in Abhängigkeit von durch die Temperaturerfassungseinrichtung erfassten Temperaturen, in Abhängigkeit von durch die Kochdunsterfassungseinrichtung erfassten Kochdünsten, zeitabhängig und/oder durch eine manuelle Bedienung abzuschalten.In a further preferred embodiment of the invention, the control device is designed to switch off the fan device as a function of temperatures detected by the temperature detection device, as a function of cooking fumes detected by the cooking evaporation device, time-dependent and / or by manual operation.

In einer noch weiteren bevorzugten Ausgestaltung der Erfindung ist die Dunstabzugshaube zusätzlich mit einer Bedienvorrichtung ausgestattet, über welche ein Benutzer die Lüftervorrichtung manuell einschalten und/oder die Leistungsstufen der Lüftervorrichtung manuell auswählen kann.In yet another preferred embodiment of the invention, the extractor hood is additionally equipped with an operating device by means of which a user can switch on the fan device manually and / or manually select the power levels of the fan device.

Das erfindungsgemäße Verfahren zum Steuern des Betriebs einer Dunstabzugshaube, welche oberhalb eines Kochgerätes mit mehreren Kochbereichen angeordnet ist, enthält die Schritte des separaten Erfassens von Temperaturen der mehreren Kochbereiche des Kochgerätes; des Einschaltens einer Lüftervorrichtung in Abhängigkeit von der erfassten Temperatur; des Erfassens des Vorhandenseins von Kochdünsten in der mittels der Lüftervorrichtung abgesaugten Abluft; des Steuerns separater Abluftströme der Lüftervorrichtung von einzelnen Kochbereichen des Kochgerätes mittels mehrerer Ventilatoren und/oder Luftklappen der Lüftervorrichtung in Abhängigkeit von den erfassten Temperaturen; und des Steuerns einer Absaugleistung der Lüftervorrichtung in Abhängigkeit von den erfassten Kochdünsten.The method according to the invention for controlling the operation of an extractor hood, which is arranged above a cooking appliance with a plurality of cooking areas, contains the steps of separately recording temperatures of the multiple cooking areas of the cooking appliance; switching on a fan device as a function of the detected temperature; detecting the presence of cooking vapors in the exhaust air extracted by means of the fan device; the control of separate exhaust air flows of the fan device from individual cooking areas of the cooking appliance by means of several fans and / or air flaps of the fan device as a function of the detected temperatures; and controlling a suction power of the fan device as a function of the detected cooking vapors.

Mit diesem Verfahren können die gleichen Vorteile erzielt werden wie sie in Zusammenhang mit der Dunstabzugshaube der Erfindung erläutert worden sind. Bezüglich der Vorteile, Begriffsdefinitionen und bevorzugten Ausgestaltungen sei deshalb an dieser Stelle nur auf die obigen Ausführungen in Zusammenhang mit der Dunstabzugshaube der Erfindung verwiesen.With this method, the same advantages can be achieved as they have been explained in connection with the extractor hood of the invention. With regard to the advantages, definitions of terms and preferred configurations, reference should therefore only be made at this point to the above statements in connection with the extractor hood of the invention.

In einer bevorzugten Ausgestaltung der Erfindung wird die Lüftervorrichtung in Abhängigkeit von einer erfassten Temperatur auf einer niedrigen Leistungsstufe eingeschaltet.In a preferred embodiment of the invention, the fan device is switched on at a low power level as a function of a detected temperature.

In einer weiteren bevorzugten Ausgestaltung der Erfindung wird die Lüftervorrichtung der Dunstabzugshaube in Abhängigkeit von den erfassten Temperaturen der mehreren Kochbereiche des Kochgerätes, in Abhängigkeit von erfassten Kochdünsten, zeitabhängig und/oder durch eine manuelle Bedienung abgeschaltet.In a further preferred embodiment of the invention, the fan device of the extractor hood is switched off as a function of the recorded temperatures of the several cooking areas of the cooking appliance, as a function of recorded cooking vapors, time-dependent and / or by manual operation.

Obige sowie weitere Merkmale und Vorteile der Erfindung werden aus der nachfolgenden Beschreibung eines bevorzugten, nicht-einschränkenden Ausführungsbeispiels anhand der beiliegenden Zeichnung besser verständlich. Darin zeigt die einzige Figur 1 eine schematische Darstellung des Aufbaus einer Ausgestaltung einer Dunstabzugshaube gemäß der vorliegenden Erfindung.The above and other features and advantages of the invention can be better understood from the following description of a preferred, non-limiting exemplary embodiment with reference to the accompanying drawings. In it shows the only one Figure 1 a schematic representation of the structure of an embodiment of an extractor hood according to the present invention.

In Figur 1 ist beispielhaft ein Ausführungsbeispiel einer Dunstabzugshaube gemäß der vorliegenden Erfindung veranschaulicht.In Figure 1 an exemplary embodiment of a range hood according to the present invention is illustrated by way of example.

Die Dunstabzugshaube 14 ist in der üblichen Weise oberhalb eines Kochfeldes 10 mit mehreren Kochstellen 12 angeordnet. Die Kochstellen 12 können gleiche oder zueinander verschiedene Größen und Formen haben. Außerdem können die Kochstellen 12 unabhängig voneinander betrieben werden, d.h. einzeln eingeschaltet und in ihren Heizleistungen geregelt werden. In diesem Ausführungsbeispiel bildet jede der insgesamt vier Kochstellen 12 gleichzeitig einen Kochbereich im Sinne der Erfindung. In anderen Ausführungsbeispielen können zum Beispiel zwei Kochstellen 12 zu einem Kochbereich zusammengefasst sein.The extractor hood 14 is arranged in the usual manner above a hob 10 with a plurality of hotplates 12. The hotplates 12 can have the same or different sizes and shapes. In addition, the hotplates 12 can be operated independently of one another, i.e. switched on individually and their heating output regulated. In this exemplary embodiment, each of the total of four hotplates 12 simultaneously forms a cooking area within the meaning of the invention. In other exemplary embodiments, for example, two hotplates 12 can be combined to form one cooking area.

Die Dunstabzugshaube 14 weist eine Lüftervorrichtung 16 mit einem Ventilator in einem Abluftkanal 17 auf. Der Ventilator wird über einen Elektromotor (nicht dargestellt) der Lüftervorrichtung 16 angetrieben. Der angetriebene Ventilator erzeugt einen Abluftstrom von den Kochstellen 12 des Kochfeldes 10 nach oben in die Dunstabzugshaube 14 und weiter in den Abluftkanal 17 hinein. Über den Abluftkanal 17 wird die Abluft beispielsweise direkt aus einem Gebäude heraus geführt oder in ein Abluftsystem weitergeleitet.The extractor hood 14 has a fan device 16 with a fan in an exhaust air duct 17. The fan is driven by an electric motor (not shown) of the fan device 16. The driven fan generates an exhaust air flow from the cooking areas 12 of the hob 10 upwards into the extractor hood 14 and further into the exhaust air duct 17. The exhaust air is, for example, led directly out of a building or passed on into an exhaust air system via the exhaust air duct 17.

Optional ist an der den Kochstellen 12 zugewandten Unterseite der Dunstabzugshaube eine Filtervorrichtung (nicht dargestellt) angeordnet. Die Filtervorrichtung ist beispielsweise lösbar montiert, um sie bei Bedarf auswechseln bzw. reinigen zu können.Optionally, a filter device (not shown) is arranged on the underside of the extractor hood facing the hotplates 12. The filter device is, for example, detachably mounted so that it can be replaced or cleaned if necessary.

Im Bereich der Unterkante der Dunstabzugshaube 14 sind mehrere (in diesem Ausführungsbeispiel vier) Infrarot-Sensoren 18 angeordnet. Die vier Infrarot-Sensoren bilden gemeinsam eine Temperaturerfassungseinrichtung im Sinne der Erfindung. Die Infrarot-Sensoren 18 sind jeweils ausgebildet und ausgerichtet, um eine Temperatur einer Kochstelle 12 des Kochfeldes 10 zu erfassen. Sie sind vorzugsweise im Umfangsrandbereich der Abzugshaube 14 und damit möglichst außerhalb des Abluftstroms positioniert. Wird eine Kochstelle 12 in Betrieb genommen, so steigt die Temperatur der Kochstelle 12 sowie des darauf positionierten Kochgeschirrs, was von den Infrarot-Sensoren 18 erfasst werden kann.In the area of the lower edge of the extractor hood 14, several (in this exemplary embodiment four) infrared sensors 18 are arranged. The four infrared sensors together form a temperature detection device within the meaning of the invention. The infrared sensors 18 are each designed and aligned in order to detect a temperature of a hotplate 12 of the hob 10. They are preferably positioned in the peripheral edge area of the extractor hood 14 and thus as far as possible outside of the exhaust air flow. If a hotplate 12 is in operation taken, the temperature of the hotplate 12 and of the cookware positioned thereon increases, which can be detected by the infrared sensors 18.

Je nach Ausführungsform können zusätzlich weitere Temperatursensoren (nicht dargestellt) an der Dunstabzugshaube 14 vorgesehen sein, welche die Temperatur der Umgebung der Dunstabzugshaube erfassen.Depending on the embodiment, additional temperature sensors (not shown) can be provided on the extractor hood 14, which detect the temperature of the surroundings of the extractor hood.

Die Infrarot-Sensoren 18 und ggf. die weiteren Temperatursensoren sind mit einer Steuereinrichtung 24 der Dunstabzugshaube 14 verbunden. Die in Figur 1 separat dargestellte Steuereinrichtung 24 ist vorzugsweise in der Dunstabzugshaube 14 integriert.The infrared sensors 18 and possibly the further temperature sensors are connected to a control device 24 of the extractor hood 14. In the Figure 1 Control device 24, shown separately, is preferably integrated in the extractor hood 14.

Wie in Figur 1 angedeutet, ist im Abluftstrom vor dem Ventilator der Lüftervorrichtung 16 wenigstens ein Kochdunstsensor 20 zum Beispiel in Form eines Ultraschallsensors, eines Infrarot-Sensors, eines Lasersensors oder dergleichen in der Dunstabzugshaube 14 angeordnet. Dieser wenigstens eine Kochdunstsensor 20 soll das Vorhandensein und die Konzentration von Kochdünsten im Abluftstrom der Dunstabzugshaube 14 erfassen.As in Figure 1 indicated, at least one cooking vapor sensor 20, for example in the form of an ultrasonic sensor, an infrared sensor, a laser sensor or the like, is arranged in the extractor hood 14 in the exhaust air flow in front of the fan of the fan device 16. This at least one cooking fume sensor 20 is intended to detect the presence and concentration of cooking fumes in the exhaust air flow from the extractor hood 14.

Wie ebenfalls in Figur 1 angedeutet, ist im Abluftstrom nach dem Ventilator der Lüftervorrichtung 16 wenigstens ein weiterer Kochdunstsensor 22 zum Beispiel in Form eines Gassensors oder dergleichen im Abluftkanal 17 der Dunstabzugshaube 14 angeordnet. Dieser wenigstens eine weitere Kochdunstsensor 22 soll die Zusammensetzung von Kochdünsten im Abluftstrom der Dunstabzugshaube 14 erfassen.As also in Figure 1 indicated, at least one further cooking vapor sensor 22, for example in the form of a gas sensor or the like, is arranged in the exhaust air duct 17 of the extractor hood 14 in the exhaust air flow downstream of the fan of the fan device 16. This at least one further cooking vapors sensor 22 is intended to detect the composition of cooking vapors in the exhaust air flow from the extractor hood 14.

Der wenigstens eine Kochdunstsensor 20 und der wenigstens eine weitere Kochdunstsensor 22 bilden eine Kochdunsterfassungseinrichtung der Erfindung. Diese Kochdunsterfassungseinrichtung kann in anderen Ausführungsbeispielen auch nur den wenigstens einen Kochdunstsensor 20 oder nur den wenigstens einen weiteren Kochdunstsensor 22 aufweisen.The at least one cooking vapor sensor 20 and the at least one further cooking vapor sensor 22 form a cooking vapor detection device of the invention. In other exemplary embodiments, this cooking vapor detection device can also have only the at least one cooking vapor sensor 20 or only the at least one further cooking vapor sensor 22.

Der wenigstens eine Kochdunstsensor 20 und der wenigstens eine weitere Kochdunstsensor 22 sind ebenfalls mit der Steuereinrichtung 24 der Dunstabzugshaube 14 verbunden.The at least one cooking vapor sensor 20 and the at least one further cooking vapor sensor 22 are also connected to the control device 24 of the extractor hood 14.

Die Steuereinrichtung 24 der Dunstabzugshaube 14 steuert die Lüftervorrichtung 16 in Abhängigkeit von den empfangenen Messsignalen der Temperaturerfassungseinrichtung und der Kochdunsterfassungseinrichtung wie folgt.The control device 24 of the extractor hood 14 controls the fan device 16 as a function of the received measurement signals from the temperature detection device and the cooking vapor detection device as follows.

Im Ausgangszustand, d.h. im Nicht-Betriebszustand bzw. Stand-by-Zustand der Dunstabzugshaube 14 überwachen die Infrarot-Sensoren 18 die Temperaturen der Kochstellen 12 des Kochfeldes 10. Die von den Infrarot-Sensoren 18 erfassten Temperaturwerte werden in der Steuereinrichtung 24 jeweils mit einem vorgegebenen Schwellenwert verglichen. Erreicht ein Temperaturwert diesen vorgegebenen Schwellenwert, so schaltet die Steuereinrichtung 24 den Elektromotor der Lüftervorrichtung 16 auf einer niedrigen Leistungsstufe ein. Der vorgegebene Schwellenwert für die Temperatur liegt hier deutlich oberhalb Raumtemperatur, er beträgt zum Beispiel 40°C, 45°C, 50°C, 55°C, 60°C oder mehr.In the initial state, ie in the non-operating state or stand-by state of the extractor hood 14, the infrared sensors 18 monitor the temperatures of the cooking zones 12 of the hob 10. The temperature values detected by the infrared sensors 18 are each indicated in the control device 24 with a specified threshold value compared. If a temperature value reaches this predetermined threshold value, the control device 24 switches on the electric motor of the fan device 16 at a low power level. The predefined threshold value for the temperature is here well above room temperature; it is, for example, 40 ° C, 45 ° C, 50 ° C, 55 ° C, 60 ° C or more.

In anderen Ausführungsbeispielen kann anstelle eines Vergleichs zwischen Temperaturwert und Schwellenwert auch ein mittlerer Temperaturwert aller Kochstellen 12, ein maximaler Temperaturwert aller Kochstellen 12, ein Differenzwert zwischen der Temperatur einer Kochstelle 12 und einer Umgebungstemperatur, ein Differenzwert zwischen der mittleren Temperatur aller Kochstellen 12 und einer mittleren Umgebungstemperatur, ein Differenzwert zwischen der maximalen Temperatur aller Kochstellen 12 und einer mittleren oder maximalen Umgebungstemperatur oder dergleichen mit einem entsprechenden vorgegebenen Schwellenwert verglichen werden. Des Weiteren besteht auch die Möglichkeit, einen zeitlichen Temperaturgradienten der vorgenannten Messwerte mit einem entsprechenden vorgegebenen Schwellenwert zu vergleichen.In other exemplary embodiments, instead of a comparison between the temperature value and the threshold value, a mean temperature value of all hotplates 12, a maximum temperature value of all hotplates 12, a difference value between the temperature of one hotplate 12 and an ambient temperature, a difference value between the mean temperature of all hotplates 12 and a middle one can be used Ambient temperature, a difference value between the maximum temperature of all hotplates 12 and a mean or maximum ambient temperature or the like can be compared with a corresponding predetermined threshold value. Furthermore, there is also the possibility of comparing a temperature gradient over time of the aforementioned measured values with a corresponding predetermined threshold value.

Vorzugsweise wird die Lüftervorrichtung 16 durch die Steuereinrichtung 24 erst dann eingeschaltet, wenn der vorgegebene Schwellenwert für eine vorbestimmte Zeitdauer erreicht bzw. überschritten wird. Auf diese Weise können zum Beispiel Messfehler ausgeglichen werden und kann ein ständiges Ein- und Ausschalten der Lüftervorrichtung 16 im Grenzbereich des Schwellenwertes vermieden werden.The fan device 16 is preferably only switched on by the control device 24 when the predetermined threshold value is reached or exceeded for a predetermined period of time. In this way, for example, measurement errors can be compensated for and constant switching on and off of the fan device 16 in the limit range of the threshold value can be avoided.

Ist die Lüftervorrichtung 16 nun mit einer niedrigen Leistungsstufe eingeschaltet, so erzeugt sie einen schwachen Abluftstrom von den Kochstellen 12 nach oben in die Dunstabzugshaube 14. Die Sensoren 20, 22 der Kochdunsterfassungseinrichtung erfassen dann Kochdünste in diesem Abluftstrom. Sind keine Kochdünste im Abluftstrom vorhanden bzw. erfassbar, so bleibt die Lüftervorrichtung 16 weiter auf niedriger Leistungsstufe im Betrieb.If the fan device 16 is now switched on at a low power level, it generates a weak exhaust air flow from the cooking areas 12 upwards into the extractor hood 14. The sensors 20, 22 of the cooking vapor detection device then detect cooking vapors in this exhaust air flow. If no cooking vapors are present or detectable in the exhaust air flow, the fan device 16 continues to operate at a low power level.

Entstehen auf dem Kochfeld 10 nennenswerte Kochdünste, so werden diese von den Sensoren 20, 22 der Kochdunsterfassungseinrichtung in der Abzugshaube 14 erfasst. Die Steuereinrichtung 24 steuert dann die Absaugleistung der Lüftervorrichtung 16 bzw. die Drehzahl des Elektromotors des Ventilators entsprechend den erfassten Kochdünsten, beispielsweise stufenlos oder in vorgegebenen Leistungsstufen. Dabei wird die Absaugleistung entsprechend den Messwerten der Kochdunsterfassungseinrichtung erhöht, abgesenkt oder im Wesentlichen konstant gehalten.If significant cooking vapors arise on the hob 10, these are detected by the sensors 20, 22 of the cooking vapor detection device in the extractor hood 14. The control device 24 then controls the suction power of the fan device 16 or the speed of the electric motor of the fan in accordance with the detected cooking vapors, for example continuously or in predetermined power levels. The suction power is increased, decreased or kept essentially constant in accordance with the measured values of the cooking vapor detection device.

Obwohl nicht dargestellt, kann die Dunstabzugshaube 14 optional zusätzlich mit einer Bedienvorrichtung ausgestattet sein. Diese Bedienvorrichtung ist dann ebenfalls mit der Steuereinrichtung2 4 verbunden. Über die Bedienvorrichtung kann ein Benutzer die Lüftervorrichtung 16 bei Bedarf manuell einschalten und manuell ihre Leistungsstufe einstellen. Die manuelle Betätigung der Dunstabzugshaube 14 hat ggf. Vorrang vor der oben beschriebenen automatischen Steuerung.Although not shown, the extractor hood 14 can optionally also be equipped with an operating device. This operating device is then also connected to the control device 2 4. Using the operating device, a user can manually switch on the fan device 16 if necessary and set its power level manually. The manual operation of the extractor hood 14 may have priority over the automatic control described above.

Das Abschalten der Dunstabzugshaube kann auf verschiedene Weise erfolgen. So kann die Steuereinrichtung 24 die Lüftervorrichtung 16 der Dunstabzugshaube 14 zum Beispiel wieder abschalten, wenn die Sensoren 20, 22 der Kochdunsterfassungseinrichtung keine Kochdünste mehr erfassen, wenn die von den Infrarot-Sensoren 18 der Temperaturerfassungseinrichtung erfasste Temperatur wieder unter den vorgegebenen Schwellenwert sinkt, durch eine manuelle Betätigung einer entsprechenden Bedienvorrichtung durch einen Benutzer, bei Erreichen einer vorbestimmten Betriebsdauer der Lüftervorrichtung 16 und dergleichen. Selbstverständlich sind auch Kombinationen dieser Bedingungen denkbar und vorzugsweise müssen die jeweiligen Bedingungen eine vorbestimmte Zeitdauer erfüllt sein.There are several ways to switch off the extractor hood. Thus, the control device 24 can control the fan device 16 of the extractor hood 14 switch off again, for example, when the sensors 20, 22 of the cooking fumes detection device no longer detect cooking fumes, when the temperature detected by the infrared sensors 18 of the temperature detection device falls below the specified threshold value again, by manual actuation of a corresponding operating device by a user Reaching a predetermined operating time of the fan device 16 and the like. Combinations of these conditions are of course also conceivable and the respective conditions must preferably be fulfilled for a predetermined period of time.

Außerdem ist die Temperaturerfassungseinrichtung so ausgebildet, dass sie die Temperaturen der einzelnen Kochstellen 12 des Kochfeldes 10 separat erfassen kann. Auf diese Weise kann mit der Lüftervorrichtung 16 ein Abluftstrom schwerpunktmäßig von der jeweils benutzten Kochstelle 12 erzeugt werden. Die Lüftervorrichtung 16 weist zu diesem Zweck mehrere Ventilatoren und/oder Luftklappen auf, welche von der Steuereinrichtung 24 angesteuert werden können.In addition, the temperature detection device is designed in such a way that it can detect the temperatures of the individual hotplates 12 of the hob 10 separately. In this way, with the fan device 16, an exhaust air flow can be generated primarily from the cooking area 12 used in each case. For this purpose, the fan device 16 has a plurality of fans and / or air flaps which can be activated by the control device 24.

BEZUGSZIFFERNLISTEREFERENCE LIST

1010
KochgerätCooking utensil
1212th
KochstellenHotplates
1414th
DunstabzugshaubeExtractor hood
1616
LüftervorrichtungFan device
1717th
AbluftkanalExhaust duct
1818th
Temperaturerfassungseinrichtung, IR-SensorenTemperature detection device, IR sensors
2020th
Kochdunsterfassungseinrichtung, SensorenCooking vapor detection device, sensors
2222nd
Kochdunsterfassungseinrichtung, SensorenCooking vapor detection device, sensors
2424
SteuereinrichtungControl device

Claims (7)

  1. Extractor hood (14), comprising
    a fan apparatus (16) for drawing away discharge air from a cooking appliance (10), which is arranged beneath the extractor hood and has several cooking areas (12), by suction;
    a temperature detection device (18) for detecting temperatures of the plurality of cooking areas (12) of the cooking appliance (10) separately; and
    a control device (24) for switching on the fan apparatus (16) depending on the temperatures which are detected by the temperature detection device (18),
    characterized in that
    the extractor hood (14) further has a cooking vapour detection device (20, 22) for detecting the presence of cooking vapours in the discharge air which is drawn away by suction by means of the fan apparatus (16);
    the fan apparatus (16) has a plurality of ventilators and/or air flaps in order to generate separate streams of discharge air from the individual cooking areas (12) of the cooking appliance (10); and
    the control device (24) is further designed to control the separate streams of discharge air of the fan apparatus (16) depending on the temperatures which are detected by the temperature detection device (18) and for controlling a suction-removal power of the fan apparatus (16) depending on cooking vapours which are detected by the cooking vapour detection device (20, 22).
  2. Extractor hood according to Claim 1,
    characterized in that
    the temperature detection device (18) has at least one infrared sensor for detecting a temperature of at least one cooking area (12) of the cooking appliance (10).
  3. Extractor hood according to either of the preceding claims,
    characterized in that
    the control device (24) is designed in order to switch on the fan apparatus (16) at a low power level depending on a temperature which is detected by the temperature detection device (18).
  4. Extractor hood according to one of the preceding claims,
    characterized in that
    the control device (24) is designed in order to switch off the fan apparatus (16) depending on temperatures which are detected by the temperature detection device (18), depending on cooking vapours which are detected by the cooking vapour detection device (20, 22), in a time-dependent manner and/or by manual operator control.
  5. Method for controlling the operation of an extractor hood (14) which is arranged above a cooking appliance (10) having several cooking areas (12), comprising the steps of:
    detecting temperatures of the several cooking areas (12) of the cooking appliance (10) separately; and
    switching on a fan apparatus (16) depending on the detected temperatures;
    characterized by the further steps of:
    detecting the presence of cooking vapours in the discharge air which is drawn away by suction by means of the fan apparatus (16);
    controlling separate streams of discharge air of the fan apparatus (16) from individual cooking areas (12) of the cooking appliance (10) by means of a plurality of ventilators and/or air flaps of the fan apparatus (16) depending on the detected temperatures; and
    controlling a suction-removal power of the fan apparatus (16) depending on the detected cooking vapours.
  6. Method according to Claim 5,
    characterized in that
    the fan apparatus (16) is switched on at a low power level depending on a detected temperature.
  7. Method according to Claim 5 or 6,
    characterized in that
    the fan apparatus (16) of the extractor hood (14) is switched off depending on the detected temperatures of the several cooking areas of the cooking appliance, depending on detected cooking vapours, in a time-dependent manner and/or by manual operator control.
EP13005692.2A 2012-12-20 2013-12-06 Extractor hood and method for controlling the operation of an extractor hood Active EP2746681B1 (en)

Applications Claiming Priority (1)

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DE102012024975.6A DE102012024975A1 (en) 2012-12-20 2012-12-20 Extractor hood and method for controlling the operation of an extractor hood

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EP2746681B1 true EP2746681B1 (en) 2021-03-10

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JP7411197B2 (en) * 2018-07-04 2024-01-11 富士工業株式会社 Range food
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EP2746681A1 (en) 2014-06-25
US20140174429A1 (en) 2014-06-26

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