WO2017013505A1

WO2017013505A1 - Hob device

Info

Publication number: WO2017013505A1
Application number: PCT/IB2016/053674
Authority: WO
Inventors: Rafael Alonso Esteban; Pilar Blasco Herranz; Jesús CEAMANOS GAYA; Sergio Llorente Gil; Marta OSTA LOMBARDO; Julio Rivera Peman
Original assignee: BSH Hausgeräte GmbH
Priority date: 2015-07-20
Filing date: 2016-06-21
Publication date: 2017-01-26
Also published as: EP3325888A1; ES2597752B1; ES2597752A1; EP3325888B1

Abstract

The invention relates to a hob device (10a-b) having a hob plate (12a- b), which is provided for placement of at least of one cookware item (14a-b), and having at least one radiation conductor (16a-b), which is provided in order to conduct infrared radiation to at least one infrared-sensor (18a-b) in at least one operating state. The problem addressed by the invention is that of providing a generic device having improved properties with regard to a temperature measurement. This problem is solved in that the radiation conductor (16a-b) has at least one radiation receiving region (20a-b) which extends over a substantial part of the hob plate (12a-b).

Description

HOB DEVICE

The invention relates to a hob device according to the preamble of patent claim 1.

From the international patent application WO 2013/034528 A1 is already a

Hob device known, in which a radiation conductor is arranged in a mounting position below a hob plate. This radiation conductor receives infrared radiation emitted by an erect cooking appliance at a first end of the radiation conductor and transports the received infrared radiation to a longitudinal direction of the infrared radiation

Radiation conductor facing away from the first end second end of the radiation conductor to which an infrared sensor is arranged. The two ends are substantially punctiform and each have an areal extent of substantially 1 mm ² .

The object of the invention is in particular to provide a generic device with improved properties in terms of temperature measurement. The object is achieved by the features of claim 1, while advantageous embodiments and modifications of the invention can be taken from the dependent claims.

The invention is based on a hob device, in particular a

Induction hob device, with a hob plate, which is provided for setting up at least one Gargeschirrs, and with at least one radiation conductor, which is intended to conduct in at least one operating state infrared radiation to at least one infrared sensor.

It is proposed that the radiation conductor has at least, in particular exactly one radiation receiving area, which extends over a substantial part of the

Hob plate extends. In particular, at least one part, in particular a subassembly, of a cooking field, in particular one

Induction hob, to be understood. In particular, the hob device may also comprise the entire hob, in particular the entire induction hob. A "cooking field plate" is to be understood in particular a unit which is provided in at least one operating state for setting up cooking utensils and which is in particular provided to form a part of an outer housing, in particular the hob device and / or a cooktop device having cooking hob. The cooktop panel consists, in particular, at least for the most part of glass and / or glass ceramic a proportion of at least 70%, in particular at least 80%, advantageously at least 90% and preferably at least 95%. A "radiation conductor" should in particular be understood to mean an element which is intended to transmit at least infrared radiation, advantageously both visible light and infrared radiation, in the longitudinal direction of the element, in particular to transport it, in particular via total internal reflection within the element. In particular, the

Radiation conductor provided to escape at least electromagnetic

Radiation in at least substantially perpendicular to a longitudinal direction of the

Radiation conductor aligned directions to prevent at least substantially. In particular, the radiation conductor consists at least for the most part of a material with a high transmissivity, such as glass fiber and / or plastic. Of the

Radiation conductor is designed in particular as a coherent in at least one mounted state unit. For example, the radiation conductor could be formed in one piece. Alternatively or additionally, subregions of the

Radiation conductor be at least materially connected to each other, such as by a welding process and / or by an adhesive process and / or by a Anspritzprozess and / or by a coating process. In at least one mounted state, the radiation conductor is in particular between at least one

Heating element, in particular the hob device, and the hob plate arranged. The hob device in particular comprises at least one heating element and advantageously at least two, particularly advantageously at least four, preferably at least eight and particularly preferably a plurality of heating elements. In particular, the hob device comprises at least one variable cooktop area, which is defined and / or formed in particular by at least a part of the heating elements. The radiation conductor is arranged in particular in an installed position above the heating element. For example, the

Radiation conductor to be placed in the installation position on the heating element. The radiation conductor could for example be at least substantially elastic. Alternatively or additionally, the radiation conductor could be formed at least substantially dimensionally stable. Alternatively or additionally, the hob device could comprise at least one carrier unit, which could be provided to carry and / or hold at least a large part of the radiation conductor in the installed position. By "infrared radiation" is meant in particular electromagnetic radiation from a wavelength range of 780 nm to 0.3 mm. <br/><br/> Preferably, the cooktop apparatus comprises at least the infrared sensor, which is provided in particular for detection of at least infrared radiation. In an installed position, the sensor is arranged in particular at a distance from at least one heating element. Sensor arranged in a mounting position outside of a particular variable cooking surface area. An "infrared sensor" should in particular be understood as meaning a sensor which has at least one infrared-sensitive detector and / or which is intended to detect at least one intensity and / or wavelength of incident infrared radiation. Sensor "are understood in particular at least one element having at least one detector for detecting at least one detection characteristic and which is intended to a the

Output characteristic characteristic value, in particular a sensor characteristic, output, wherein it is advantageous in the detection characteristic to a physical and / or chemical size. The detector of the infrared sensor and / or a

Detection range of the infrared sensor are / is arranged in at least one mounted state, in particular in a vicinity of one end of the radiation conductor, the detector and / or the detection area a minimum distance, in particular when all points of the infrared sensor, to the end of the radiation guide exhibit. Under an "end" of the radiation conductor is in particular an edge of the

Radiation conductor to be understood, which is aligned in a developed state perpendicular to a longitudinal extent of the radiation conductor. Under one

"Longitudinal extent" of an object is to be understood as meaning, in particular, a length of a longest side of a smallest imaginary geometric cuboid barely enclosing the object, Preferably, the radiation receiving area is a receptacle of infrared radiation emitted by at least one installed cooking utensil

provided, which in particular at least substantially perpendicular to the

Radiation receiving area, in particular to an areal extent of

Radiation receiving area, is aligned. The radiation receiving area is advantageous for receiving infrared radiation transmitted through the cooktop panel

intended. In particular, the infrared radiation emitted by the cooking utensil passes through the cooking field plate, in particular in a direction perpendicular to a main extension plane of the cooking surface plate, before being picked up by the radiation receiving region

Direction. In an installed position, the radiation conductor is arranged in particular at least to a large extent below the hob plate. The radiation conductor is arranged in the installed position, in particular at least to a large extent between the hob plate and at least one heating element. In particular, at least a portion of the

Radiation conductor in the installed position in a vicinity of the hob plate, in particular a bottom of the hob plate arranged. A "main extension plane" of an object should be understood to mean, in particular, a plane which is parallel to a largest side surface of a smallest imaginary geometric cuboid, which is the Object just completely encloses, and in particular runs through the center of the cuboid. By the notion that a straight line and / or plane is aligned "at least substantially perpendicularly" to a further straight line and / or plane formed separately from a straight line and / or plane, it shall be understood in particular that the straight line and / or Level with the further straight line and / or plane in a projection on at least one projection plane, in which at least one of the lines and / or one of the planes is arranged, a Wnkel includes, by 30 °, in particular by a maximum of 15 °, advantageously to A maximum of 10 °, particularly advantageously not more than 5 ° and preferably not more than 2 °, deviates from a roll of 90 °

Radiation absorption area has a surface extent parallel to the cooking field plate of at least 10 mm ² , in particular of at least 15 mm ² , advantageously of at least 20 mm ² , particularly advantageously of at least 25 mm ² , preferably of at least 50 mm ² and particularly preferably at least 75 mm ² , and / or that the

Radiation receiving area has a longitudinal extent parallel to the hob plate of at least 2 mm, in particular of at least 5 mm, advantageously of at least 10 mm, more preferably of at least 20 mm, preferably of at least 35 mm and particularly preferably at least 50 mm. An extension "parallel to an object" is to be understood as meaning, in particular, an extension which is aligned at least substantially parallel to a main extension plane of the object, by using a straight line and / or plane "at least substantially parallel" to another, from the straight and / or plane formed separately from a straight line and / or plane in a projection onto at least one projection plane, which is aligned perpendicular to at least one of the planes or which includes both straight lines in the case of two straight lines, in the at least one of the straight lines and / or one of the planes is arranged, should be understood in particular that the straight line and / or plane with the further straight line and / or plane includes a Wnkel by a maximum of 15 °, in particular by a maximum of 10 °, advantageously by a maximum 5 ° and preferably deviates by a maximum of 3 ° from a winkel of 0 °. Of the

Radiation receiving area is preferably a contiguous particular spatial area, which is particularly free of interruptions. Subareas of the radiation conductor are in particular connected to one another. The term "provided" should be understood to mean in particular specially programmed, designed and / or equipped, in particular that an object is intended for a specific function be understood that the object has this particular function in at least one

Application and / or operating state meets and / or executes.

The inventive design can in particular an optimal

Temperature measurement can be achieved. In particular, a majority of an infrared radiation emitted by a cooking utensil can be used to determine the temperature, as a result of which, in particular, a small fault tolerance and / or a precise indication of a temperature can / can be achieved. Advantageously, at least one maximum temperature can be detected in each operating state, whereby a low risk of overcooking can be achieved. In particular, a high signal strength of infrared radiation can be made possible.

It is also proposed that the radiation receiving area has a surface extent parallel to the cooking field plate of at least 100 mm ² , in particular of at least 200 mm ² , advantageously of at least 500 mm ² , particularly advantageously of at least 1000 mm ² , preferably of at least 5000 mm ² and particularly preferred at least 10,000 mm ² . The radiation conductor has, in particular, a cross-sectional area, which is aligned in particular at least substantially perpendicular to a longitudinal direction of the radiation conductor, of not more than 60 mm ² , in particular not more than 40 mm ² , advantageously not more than 20 mm ² , particularly preferably not more than 10 mm ² of not more than 5 mm ² and more preferably not more than 1 mm ² . As a result, in particular all infrared radiation emitted by a cooking utensil can be recorded and / or a precise temperature determination can be made possible.

In addition, it is proposed that the radiation receiving area at least one

Has longitudinal extent parallel to the cooking field plate, which at least 50%, in particular of at least 60%, preferably at least 70%, more preferably at least 75% and preferably at least 80% of an extent of

Cooking field plate in a direction parallel to the longitudinal extent and / or in particular is parallel to a longitudinal direction of the radiation conductor. The longitudinal extension of the radiation receiving region is in particular aligned at least substantially parallel to the longitudinal direction of the radiation conductor. A "longitudinal direction" of an object should in particular be understood to mean a direction which is aligned parallel to a longest side of a smallest imaginary geometric cuboid just surrounding the object

Aufstellposition a Gargeschirrs and / or a high level of comfort can be achieved.

For example, the radiation receiving area could be provided, in particular at least substantially perpendicular to one end of the radiation conductor and in particular, at least substantially parallel to the longitudinal direction of the radiation conductor to receive aligned infrared radiation. Preferably, the radiation receiving area is provided to receive at least substantially perpendicular to a longitudinal direction of the radiation guide aligned infrared radiation. In particular, the radiation receiving area is arranged on a longitudinal side of the radiation conductor. The radiation receiving region is advantageously aligned at least substantially parallel to the longitudinal direction of the radiation conductor. In particular, the longitudinal extension of the radiation receiving region is aligned at least substantially parallel to the longitudinal direction of the radiation conductor. As a result, a large radiation receiving area can be provided in a simple manner, in particular.

The radiation receiving area could be provided, for example, to receive infrared radiation from a single, especially large heating zone. Preferably, the radiation receiving area is provided to receive infrared radiation from at least two heating zones. The heating zones could be designed, for example, as multiple heating zones. Mehrfachheizzonen could be designed, for example, as closely spaced heating zones and / or concentrically arranged heating zones and / or as partially encompassing heating zones. Multiple heating zones could in particular have an elongate shape and be provided for heating a brewer and / or a casserole and / or an elongated cooking utensil. It is advantageous

Radiation receiving area provided to receive infrared radiation from at least two separate heating zones, which in particular in at least one

Operating state in which the heating zones are in particular at least substantially simultaneously active, are provided for heating of different cooking utensils. The separate heating zones are arranged spaced apart, in particular, in a direction aligned at least substantially parallel to the cooking field plate and advantageously have a spacing of at least 5 cm, in particular at least 8 cm, advantageously at least 10, in the direction aligned at least substantially parallel to the hob plate cm, more preferably at least 15 cm and preferably at least 20 cm. As a result, in particular, at least one further radiation conductor can be dispensed with and / or a cost-effective design can be made possible.

In addition, it is proposed that the hob device in particular comprises at least one and advantageously the infrared sensor which is provided to receive from the radiation conductor at least substantially simultaneously the infrared radiation of the heating zones. The radiation conductor is provided in particular for entering the radiation conductor To direct infrared radiation on at least substantially the same path to the infrared sensor, the path in particular by a lateral boundary of the

Radiation conductor is defined and advantageously extends at least to a large extent, in particular completely, within the radiation conductor. In particular, the radiation conductor is intended to guide infrared radiation of different heating zones at least substantially simultaneously and in particular on at least substantially the same path, in particular while avoiding separation of the infrared radiation of the different heating zones into a plurality of beam bundles. In an installed position, the infrared sensor is arranged in particular at least to a large extent below the hob plate. Under the phrase that the infrared sensor is intended to receive from the radiation conductor "at least substantially simultaneously" the infrared radiation of the heating zones, should be understood in particular that the infrared sensor is provided to infrared radiation of a first the heating zones and infrared radiation of a second of the heating zones at a time interval of a maximum of 1 s, in particular of at most 0.5 s, preferably of at most 0, 1 s, particularly advantageously of not more than 0.01 s and preferably of not more than 0.001 s As a result, in particular a timely detection of infrared radiation of both heating zones can be achieved.

Furthermore, it is proposed that the cooktop device comprises a control unit which is provided to determine a temperature of that heating zone having the larger, in particular the highest, temperature as a function of the infrared radiation received by the infrared sensor. In particular, the infrared sensor transmits at least one sensor parameter to the control unit. The sensor parameter is dependent, in particular, on the infrared radiation received by the infrared sensor. In particular, the control unit receives the sensor parameter transmitted by the infrared sensor and determines, in particular based on the received sensor parameter, a temperature of that heating zone having the larger, in particular the largest, temperature. A "control unit" is to be understood in particular as meaning an electronic unit which is preferably at least partially integrated in a control and / or regulating unit of a cooktop and which is preferably provided to control and / or regulate at least one power electronic unit Control unit, a computing unit and in particular in addition to the arithmetic unit, a memory unit with a control and / or control program stored therein, which is provided by the

Calculation unit to be executed. This can be achieved in particular a low risk of overcooking. It is also proposed that the radiation conductor has at least one deflecting element, which is aligned obliquely relative to a longitudinal direction of the radiation conductor and provided to direct at least partially infrared radiation received in the longitudinal direction. In particular when viewing the radiation conductor in at least one sectional plane, which in particular at least substantially parallel to the

Longitudinal direction of the radiation conductor is aligned, the deflecting element and the longitudinal direction of the radiation conductor a minimum Wnkel of at least 1 °, in particular at least 3 °, preferably at least 5 °, more preferably at least 7 ° and preferably at least 10 °. The deflecting element and the longitudinal direction of the radiation conductor close in consideration of the radiation conductor in at least one sectional plane, which in particular at least substantially parallel to the

Longitudinal direction of the radiation conductor is aligned, a smallest Wnkel of a maximum of 45 °, in particular of a maximum of 30 °, advantageously of at most 25 °, more preferably of a maximum of 20 ° and preferably of at most 15 °. The recorded infrared radiation has entered in particular into the radiation conductor and is advantageously located within the radiation conductor. In particular, the received infrared radiation has entered the radiation conductor in a direction aligned at least substantially perpendicular to the longitudinal direction of the radiation conductor. For example, the deflecting element could be produced by means of extrusion and / or by means of laser. Under the

Turn that the deflection is intended to "directed at least partially" in the longitudinal direction, it should be understood, in particular, that the deflecting element is provided to the infrared radiation received from an aligned at least substantially perpendicular to the longitudinal direction

Direction of incidence to direct in one direction, which with the longitudinal direction a smallest Wnkel of a maximum of 80 °, in particular of at most 70 °, advantageously of at most 65 °, more preferably of a maximum of 60 ° and preferably of at most 55 °.

As a result, in particular a rapid transmission of the recorded infrared radiation can be made possible.

In addition, it is proposed that the deflecting element is arranged in at least one mounted state on a side facing away from the hob plate side of the radiation conductor. As a result, in particular, a targeted deflection and / or forwarding of the infrared radiation which has entered the radiation conductor can be achieved.

The deflecting element could for example be an independent element, which in particular on the in at least one mounted state of the hob plate

arranged remote surface of the radiation conductor and / or placed and / or could be attached. Preferably, the deflection element is designed as a surface element of the radiation conductor. The deflecting element is in particular formed integrally with the radiation conductor, in particular with a surface of the radiation conductor. As a result, in particular an inexpensive embodiment can be provided and / or a simple production can be achieved.

It is also proposed that the radiation conductor has at least one reflection element which is arranged in at least one mounted state on a side facing away from the hob plate of the radiation conductor and a reflectivity of at least 0.8, in particular of at least 0.85, advantageously of at least 0.9 , Particularly advantageously of at least 0.95, and preferably of at least 0.98. For example, the reflective element could be used as a surface element of the

Radiation conductor formed and in particular be arranged at least for the most part within the radiation conductor. Alternatively, the reflective element could be produced by a surface treatment of a surface of the radiation conductor. The reflection element is advantageous as a coating and / or a lacquer and / or as a

Texturing and / or formed as a materially connected to the radiation conductor, in particular with a surface of the radiation conductor, connected object. The reflection element is intended in particular to reflect incident infrared radiation to a proportion of at least 80%, in particular of at least 85%, advantageously of at least 90%, particularly advantageously of at least 95%, and preferably of at least 98%. For example, the reflection element could consist at least to a large extent of gold and / or aluminum. Under a "reflectivity" of an object is intended

in particular a property of the object to be understood, electromagnetic

Radiation as a function of a temperature of the object and in particular in addition to a function of the temperature depending on wavelength and advantageously independent of a direction, in particular an incident direction to reflect, wherein the object is designed in particular as a Lambert radiator. The reflectivity is especially as a reflectance and advantageous as a hemispheric spectral

Reflectance referred to. As a result, it is possible, in particular, to prevent an escape of recorded infrared radiation and / or to use all the infrared radiation recorded to determine the temperature.

In addition, it is proposed that the hob device at least one more

Radiation conductor having a longitudinal direction, which is aligned at least substantially perpendicular to a longitudinal direction of the radiation conductor. The radiation conductor and the further radiation conductor are in particular at least substantially identical educated. In particular, the radiation conductor and the other differ

Radiation conductor by an orientation of a longitudinal direction and, for example, additionally by a value of a longitudinal extent. As a result, in particular in a large area of the cooktop panel, it is possible to determine the temperature of mounted cooking utensils. Advantageously, a temperature determination of the cooking utensil with the lower temperature can be achieved for a case in which at least two cooking utensils on the radiation receiving area and at least one of the cooking utensils with a lower temperature are additionally set up on a further radiation receiving area of the further radiation conductor.

The hob device should not be limited to the application and embodiment described above. In particular, in order to fulfill a mode of operation described herein, the cooktop apparatus may have a number different from a number of individual elements, components and units mentioned herein.

Further advantages emerge from the following description of the drawing. In the drawings, embodiments of the invention are shown. The drawing, the description and the claims contain numerous features in combination. The expert will expediently consider the features individually and to meaningful further

Combine combinations.

Show it:

Fig. 1 shows a hob with a hob device in a schematic

Top view,

Fig. 2 a cooking utensils, a cooktop plate, a radiation conductor, a

Heating element, an infrared sensor, a control unit and a

Power electronics in a highly simplified, schematic

Presentation,

Fig. 3 shows a detail of the radiation conductor in a schematic

Sectional view

4 shows an enlarged detail of the radiation conductor from FIG. 3 in a schematic sectional representation and FIG

Fig. 5 shows an alternative hob with an alternative hob device in a schematic plan view.

Fig. 1 shows a cooktop 40a, which is formed as an induction cooktop, with a cooktop device 10a, which is formed as an induction cooktop device. Hob device 10a includes a cooktop panel 12a. In a mounted state the cooktop panel 12a forms part of an outer casing, in particular an outer casing of the cooktop 40a. The hob plate 12a is provided for setting up cooking utensils 14a (see Fig. 2).

Hob device 10a includes a plurality of heating elements 42a (see Fig. 2). The

Heating elements 42a are each provided to heat cooking utensils 14a placed above the heating elements 42a on the hob plate 12a. The heating elements 42a are designed as induction heating elements.

A part of the heating elements 42a forms a first variable cooking surface area 44a. A part of the heating elements 42a forms a second variable cooking surface area 46a. The variable cooking surface areas 44a, 46a are arranged side by side. In each case a variable cooking surface area 44a, 46a is arranged on one side of the hob plate 12a. In the mounted state, the variable cooktop areas 44a, 46a extend from an operator-facing area to an operator-facing area of cooktop panel 12a. In an alternative embodiment, the heating elements could

in particular, form a single contiguous variable cooking surface area. Alternatively, the heating elements, for example, spaced from each other, in particular in the form of a classic hob, be arranged and in particular each form an independent heating zone.

The hob device 10a comprises an operating unit 48a. The operating unit 48a is provided for input and / or selection of operating parameters, for example a heating power and / or a heating power density and / or a heating zone. The operation unit 48a is provided for outputting a value of an operation parameter to an operator.

Hob device 10a includes a control unit 30a. The control unit 30 a is provided to be in response to input by means of the operating unit 48 a

Operating parameters perform actions and / or change settings. The

Control unit 30a regulates an energy supply to the heating elements 42a in an operating state.

Hob device 10a includes power electronics 50a (see Fig. 2). To control the power supply to the heating elements 42a, the control unit 30a controls the power electronics 50a. In response to activation by the control unit 30a, the power electronics 50a supply the heating elements 42a with energy. The

Power electronics 50a provide a high frequency alternating current to power the heating elements 42a. In the operating state, the control unit 30a controls the Power electronics 50a to a supply of those of the heating elements 42a, above which a cooking utensil 14a is set up.

Hob device 10a comprises two radiation conductors 16a (see Figures 1 to 4). Of multiple existing objects is in the figures only one with a

Provided with reference numerals. In each case a radiation conductor 16a is one of the variable

Cooking surface areas 44a, 46a assigned. In the following, only one of the

Radiation conductor 16a and one of the variable cooking surface areas 44a, 46a described.

In the operating state, the radiation conductor 16a directs infrared radiation to an infrared sensor 18a. Hob device 10a includes infrared sensor 18a. The infrared sensor 18a is disposed at one end of the radiation conductor 16a. In the assembled

State, the infrared sensor 18a is disposed outside of the variable cooking surface area 44a, 46a.

The radiation conductor 16a has a radiation receiving area 20a (see Figures 2 to 4). The radiation receiving area 20a is provided for receiving infrared radiation emitted by the cooking utensil 14a. In the assembled state is the

Radiation receiving portion 20a facing the hob plate 12a. Of the

Radiation receiving area 20a extends over a substantial part of

Hob plate 12a. The radiation receiving area 20a extends over in

Essentially the entire variable cooking surface area 44a, 46a.

In the present embodiment, the radiation receiving area 20a has a

Longitudinal extent 22a parallel to the cooking field plate 12a, which is substantially 75% of an extension of the cooking field plate 12a in a direction parallel to the longitudinal extent 22a. The radiation receiving area 20a has an areal extent parallel to the cooking field plate 12a of substantially 15000 mm ² . Of the

Radiation receiving area 20a is at one in a longitudinal direction 24a of the

Radiation conductor 16 a extending surface of the radiation conductor 16 a arranged.

The radiation receiving area 20a receives infrared radiation aligned substantially perpendicular to the longitudinal extent 22a of the radiation conductor 16a in the operating state (see FIGS. 2 to 4). In the operating state takes the

Radiation receiving portion 20a infrared radiation, which emanates from all above the radiation conductor 16a established Gargeschirren 14a. Of the

Radiation receiving area 20a receives in the operating state infrared radiation from a plurality of heating zones 26a, 28a. For example, below are without

Restriction of the general two heating zones 26a, 28a assumed. The radiation conductor 16a directs the infrared radiation received by the radiation receiving area 20a to the infrared sensor 18a. The infrared sensor 18a receives from the radiation conductor 16a substantially simultaneously the infrared radiation of the heating zones 26a, 28a. In the operating state, the infrared sensor 18a detects the infrared radiation received by the radiation conductor 16a. The infrared sensor 18a transmits a

Sensor characteristic to the control unit 30a. The sensor characteristic is dependent on the infrared radiation received by the infrared sensor 18a.

The control unit 30a detects in dependence on the infrared sensor 18a

received infrared radiation, a temperature of that heating zone 26a, 28a with the greater temperature. Depending on the determined temperature, the

Control unit, for example, the power electronics, in particular to control the energy supply of those heating elements that are associated with the heating zone with the determined temperature, control. In the operating state, the control unit could control and / or regulate a temperature-controlled cooking process, in particular as a function of the determined temperature.

The radiation conductor 16a has a deflection element 32a (see FIGS. 3 and 4). The

Deflection element 32a is aligned obliquely relative to the longitudinal direction 24a of the radiation conductor 16a. In the present embodiment, the deflection element 32a and the longitudinal direction 24a of the radiation conductor 16a include a minimum angle of substantially 8 °. The deflecting element 32a deflects in the operating state of the

Radiation receiving portion 20 a received infrared radiation partially in the

Longitudinal direction 24a of the radiation conductor 16a to. In the operating state that steers

Deflection element 32a of the radiation receiving area 20a received infrared radiation from a substantially perpendicular to the longitudinal direction 24a of

Radiation conductor 16 a aligned direction in a direction, which a

Total reflection of the recorded infrared radiation within the radiation conductor 16a allows.

The deflecting element 32a is formed as a surface element of the radiation conductor 16a. In the assembled state, the deflecting element 32 a on one of

Hob plate 12a opposite side of the radiation conductor 16a arranged. The

Deflection element 32a is in the assembled state as a lower surface of the

Radiation conductor 16a formed.

The radiation conductor 16a has a reflection element 34a (compare FIGS. 3 and 4). In the assembled state, the reflection element 34a is arranged on a side of the radiation conductor 16a facing away from the hob plate 12a. For example, that could Reflection element may be formed as a micro-texturing of a surface of the radiation conductor, which in the assembled state, in particular on one of

Hob plate facing away from the radiation conductor could be arranged. In the present embodiment, the reflection element 34a is formed as a coating of the radiation conductor 16a.

The reflection element 34a has a reflectivity of substantially 0.95. In the operating state, the reflection element 34a substantially prevents leakage of received infrared radiation.

In Fig. 5, a further embodiment of the invention is shown. The following descriptions are essentially limited to the differences between the embodiments, with respect to the same components, features and

Functions can be made to the description of the embodiment of Figs. 1 to 4. To distinguish the embodiments, the letter a in the reference numerals of the embodiment in FIGS. 1 to 4 is replaced by the letter b in the reference numerals of the embodiment of FIG. With respect to the same designated components, in particular with respect to components with the same reference numerals, can

basically also to the drawings and / or the description of the

Embodiment of Figs. 1 to 4 are referenced.

Fig. 5 shows a hob 40b with a hob device 10b. Hob device 10b includes a cooktop panel 12b. In a mounted state are below the

Hob plate 12b two radiation conductors 16b and two the radiation conductors 16b

associated infrared sensors 18b arranged.

Hob device 10b includes two further radiation conductors 36b. The

Hob device 10b comprises two further infrared sensors 52b. In each case a further infrared sensor 52b is assigned to one of the further radiation conductors 36b. In the following, only one of the radiation conductors 16b, one of the infrared sensors 18b, one of the further radiation conductors 36b and one of the further infrared sensors 52b will be described.

The infrared sensor 18b and the further infrared sensor 52b are formed substantially identical. The radiation conductor 16b and the further radiation conductor 36b are in

Essentially identical. The further radiation conductor 36b has a

Longitudinal direction 38b. The longitudinal direction 38b of the further radiation conductor 36b is oriented substantially perpendicular to a longitudinal direction 24b of the radiation conductor 16b.

The further radiation conductor 36b has a further radiation receiving area. The further radiation receiving region has a longitudinal extent parallel to the Hob plate 12b, which is substantially 92% of an extension of the cooking field plate 12b in a direction parallel to the longitudinal extent of the other

Radiation receiving range is. The further radiation receiving area essentially extends over two adjacently arranged variable cooktop areas 44b, 46b. A control unit 30b determines, depending on the infrared radiation received by the infrared sensor 18b and / or the further infrared sensor 52b, a temperature of that heating zone 26b, 28b with the greater temperature. For example, a case with two heating zones 26b, 28b is assumed, which are arranged above the radiation conductor 16b. One of the heating zones 26b, 28b is arranged above the further radiation conductor 36b. In the operating state, the control unit 30b determines a temperature of the heating zone 26b, 28b, which is arranged in the operating state above the radiation conductor 16b and the further radiation conductor 36b and has a temperature with a smaller value, by means of the infrared received from the further infrared sensor 52b - radiation.

reference numeral

10 hob device

12 hob plate

14 cooking utensils

16 radiation conductor

18 infrared sensor

20 radiation receiving area

22 longitudinal extension

24 longitudinal direction

26 heating zone

28 heating zone

30 control unit

32 deflecting element

34 reflection element

36 Further radiation conductor

38 longitudinal direction

40 hob

42 heating element

44 Variable cooking surface area

46 Variable cooking surface area

48 operating unit

50 power electronics

52 Additional infrared sensor

Claims

Hob device with a hob plate (12a-b), which is provided for setting up at least one Gargeschirrs (14a-b), and at least one radiation conductor (16a-b), which is provided in at least one

Operating state to direct infrared radiation to at least one infrared sensor (18a-b), characterized in that the radiation conductor (16a-b) has at least one radiation receiving area (20a-b) which extends over a substantial part of the cooking field plate (12a-12a). b) extends.

Hob device according to claim 1, characterized in that the radiation receiving area (20a-b) has an areal extent parallel to the cooking field plate (12a-b) of at least 100 mm ² .

Cooking field device according to one of the preceding claims, characterized in that the radiation receiving area (20a-b) has at least one longitudinal extent (22a-b) parallel to the cooking field plate (12a-b) which covers at least 50% of an extension of the cooking field plate (12a-b). in a direction parallel to the longitudinal extent (22a-b).

Cooking field device according to one of the preceding claims, characterized in that the radiation receiving area (20a-b) is provided to receive at least substantially perpendicular to a longitudinal direction (24a-b) of the radiation conductor (16a-b) aligned infrared radiation.

Cooking field device according to one of the preceding claims, characterized in that the radiation receiving area (20a-b) is provided to receive infrared radiation from at least two heating zones (26a-b, 28a-b).

Hob device according to claim 5, characterized by the infrared sensor (18a-b), which is intended to at least substantially simultaneously from the radiation conductor (16a-b), the infrared radiation of the heating zones (26a-b, 28a-b) receive.

Cooking field device according to claim 6, characterized by a control unit (30a-b) which is provided, depending on the infrared radiation received by the infrared sensor (18a-b), a temperature of that heating zone (26a-b, 28a-b) to determine with the higher temperature. Hob device according to one of the preceding claims, characterized in that the radiation conductor (16a-b) has at least one deflecting element (32a-b) which is inclined relative to a longitudinal direction (24a-b) of the

Radiation conductor (16a-b) is aligned and intended to at least partially directed infrared radiation in the longitudinal direction (24a-b) to direct.

Hob device according to claim 8, characterized in that the deflecting element (32a-b) is arranged in at least one mounted state on a side facing away from the hob plate (12a-b) side of the radiation conductor (16a-b).

Hob device according to claim 8 or 9, characterized in that the deflecting element (32a-b) is designed as a surface element of the radiation conductor (16a-b).

Hob device according to one of the preceding claims, characterized in that the radiation conductor (16a-b) at least one

Reflection element (34a-b), which in at least one mounted state on one of the cooking field plate (12a-b) facing away from the

Radiation conductor (16a-b) is arranged and has a reflectivity of at least 0.8.

Hob device according to one of the preceding claims, characterized by at least one further radiation conductor (36b) having a longitudinal direction (38b) which is aligned at least substantially perpendicular to a longitudinal direction (24b) of the radiation conductor (16b).

Hob with at least one hob device (10a-b) according to any one of the preceding claims.