EP2824392B1 - Domestic appliance system with a cooktop plate - Google Patents

Description

The invention is based on a domestic appliance system with a domestic appliance device according to the preamble of claim 1.

There is already a home appliance device, namely a household appliance plate has been proposed having a base body and a layer unit, which is disposed on one side of the base body. Here, the main body is formed as a disk unit. The layer unit is formed as a coating applied to one side of the plate unit. The layer unit, which is provided for a decoration is formed non-transparent in each operating state of visible light and has an operator in each operating state of visible colors.

From the German patent application DE 10 2004 033 715 A1 a glass or glass ceramic plate is already known, which typically finds use in the household sector as cooking surfaces, oven windows, fireplace viewing windows, operating panels, etc. The functional decorative layer serves to display, design and / or safety functions by means of a corresponding functional decor. The functional decorative layer contains in the areas of the respective functional decors at least one substance that is optically activatable when externally supplied by invisible energy.

The German patent application DE 10 2004 040 759 A1 discloses a glass or glass ceramic plate, which is typically used in the household area as cooking surfaces, oven windows, fireplace viewing windows, operating panels, etc. It typically has at least one area for representing a function, for example a display. The glass or glass-ceramic plate is doped with at least one substance in the form of luminophores, which emit luminescence in the visible region on external supply of stimulating energy. The area for representing a function is assigned an external stimulating energy arrangement, such that the area can be excited in accordance with the geometry of the function to be displayed.

From the international patent application WO 2008/128900 A2 is already a home appliance device with a disc of an at least partially transparent Material is known, comprising a user accessible front or top. A portion of the disc is provided below the front or top with luminescent material.

The US document US 2004/0112887 A1 discloses a method to warn people that the cooking surface of a cooker is hot. The method includes where a portion of the cooking surface comprises a thermochromic compound ring member surrounding each heating element of the oven and which displays a heat warning symbol to warn persons that the heating element or a nearby area is too hot to touch. A liquid crystal or other thermochromic compound intended to have and maintain a perceptible color change at or above a predetermined temperature, for example 115 degrees Fahrenheit, is like the outline of the word "HOT" or as another heat warning symbol is formed or is intended to assume a transparent color and thereby make visible below the compound formed as such a label heat warning symbol or other warning symbol. The ring member is formed to have a ring, a circular arc or a line surrounding the heating element and an arrow pointing to the heating element.

From the German patent application DE 10 2005 025 896 A1 is already a hob plate with an optical temperature display and with a device for optical temperature detection and a respective corresponding hob known. For this purpose, both layers with temperature-dependent optical transmission at the bottom and thermochromic coatings at the top of the hob plate are provided. The layers at the bottom are interrogated with transmission sensors for temperature determination. The layers on the top change their color at about 60 ° C, so that an operator can detect an overlying temperature including danger.

The European patent application EP 0 646 753 A2 discloses a temperature-insulating viewing window or door for a device with deviating from its ambient temperature inside temperature, especially for ovens or ovens or drying cabinets, with a held by a common frame arrangement of spaced-apart panes of glass, glass ceramic or another transparent temperature-resistant material, wherein between the, the ambient temperature and, the interior temperature of the device exposed disc at least one further disc is arranged.

The object of the invention is in particular to provide a home appliance system with a generic device with improved properties in terms of a flexible arrangement and / or shape of a marker. 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 household appliance device, in the form of a household appliance plate, is equipped with at least one base body and with at least one layer unit which is arranged, in particular fastened, on at least one side of the base body.

The layer unit is at least partially infrared active. The home appliance device is designed as a hob device, advantageously as an induction hob device. The domestic appliance plate is designed as a hob plate, advantageously as an induction hob plate. A "basic body" is to be understood in particular as meaning a unit which is intended to carry and / or hold at least a weight of at least one further unit, in particular the layer unit, at least partially, in particular for the most part. In particular, the base body is at least partially formed as a plate unit. By the phrase that the base body is intended to "at least partially" carry and / or hold at least one weight of at least one further unit, it should be understood, in particular, that the base body is intended to carry at least one weight of at least one further unit to carry and / or hold more than 70%, in particular more than 80% and advantageously more than 90%. Under the phrase that the main body "at least partially" is formed as a plate unit, should be understood in particular that the main body to a Mass fraction and / or volume fraction of more than 70%, in particular more than 80% and advantageously more than 90% is formed as a plate unit. For example, it is conceivable that the base body is formed at least partially curved, wherein the base body could be formed, for example, as a door of a refrigerator, in particular a refrigerator and / or a freezer. A "plate unit" is to be understood in particular a unit which has a thickness which is substantially smaller than a width and / or a length of the unit. A "thickness" of the unit is to be understood in particular a minimum under the maximum dimensions of the unit along any spatial directions. A "maximum extent" of a unit along a spatial direction is to be understood as meaning, in particular, the maximum length of all distances which connect two boundary points of the unit and extend parallel to the spatial direction. A "width" and a "length" of the unit should in particular be understood to mean the maximum dimensions of the unit along two spatial directions that are at least substantially perpendicular to one another and preferably at least substantially perpendicular to a spatial direction along which the unit is maximum Extension has the thickness. In particular, the length and width of the unit are the maximum extents along spatial directions for which the sum of the maximum extents is maximum. In particular, the domestic appliance device has at least two, in particular at least four, advantageously at least six, preferably at least eight, layer units. A "layer unit" is to be understood in particular as meaning a unit which is arranged on at least one side of the base body and which has an extension, advantageously a thickness, in at least one first direction which is aligned at least substantially perpendicular to the side of the base body which is less than 100%, in particular less than 50%, advantageously less than 25%, particularly advantageously less than 10%, preferably less than 1%, of an extension of the basic body in the first direction. In particular, the layer unit is at least partially formed as a plate unit. By the phrase that the layer unit is "at least partially" infrared-active, it should be understood, in particular, that the layer unit comprises at least one infrared-active layer which has a mass fraction and / or volume fraction of more than 70%, in particular more is formed as 80% and advantageously more than 90% infrared active. Under the phrase that the layer unit is at least partially "infrared-active" is formed, it should be understood in particular that the Layer unit is provided to change by irradiation at least with infrared radiation, in particular only with infrared radiation, at least one material property. In particular, the layer unit forms at least one marking. In particular, the layer unit is intended to mark at least one specific area. For example, it is conceivable that the layer unit at least one specific area of the base body on a plane which is aligned at least substantially parallel to the base body, with respect to at least one center of the specific area at least over an angular range of more than 180 °, in particular more than 270 ° and advantageously more than 330 ° surrounds. For example, the layer unit could be designed as a narrow strip in particular and surround the specific area. Alternatively, the layer unit could extend over at least a major part of the base body, the specific area being recessed, in particular uncoated. For example, the particular area could include a heating zone, a manufacturer's mark, and / or a manufacturer's logo. 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 by 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 the planes is arranged, an angle includes, preferably by less than 15 °, advantageously by less than 10 ° and in particular deviates by less than 5 ° from an angle of 90 °. By the notion that a straight line and / or plane is oriented "at least substantially parallel" to a further straight line and / or plane that is separated from a straight line and / or plane, it should be understood in particular that the straight line and / or Level with the further straight line and / or plane includes an angle which preferably deviates by less than 15 °, advantageously by less than 10 ° and in particular by less than 5 ° from an angle of 0 °. By "infrared radiation" is meant in particular electromagnetic radiation from a wavelength range of 180 nm to 0.3 mm. By "intended" is intended to be understood in particular specially designed and / or equipped. The fact that an object is intended for a specific function should in particular mean that the object fulfills and / or executes this specific function in at least one application and / or operating state.

The embodiment according to the invention makes it possible, in particular, to achieve an advantageous marking, which in particular has a flexible shape and / or can be flexibly arranged. In particular, advantageous special areas of the base body, in particular independently of a size and / or shape of the areas, can be highlighted specifically. By the layer unit, which is partially infrared active, advantageously a space-saving lighting and a small number of components can be achieved. Advantageously, many and / or fine, in particular self-luminous marks can be operated with little effort, in particular with a small number of light sources of a home appliance system.

It is also proposed that the layer unit is intended to at least partially convert infrared radiation into visible light. By the phrase that the layer unit is intended to convert infrared radiation "at least partially" into visible light, it should be understood in particular that the layer unit is intended to account for more than 10%, in particular more than 25%. and advantageously convert more than 50% of incident infrared radiation into visible light. In particular, the layer unit is intended to be placed on irradiation with infrared radiation at least in a first excited state. In particular, the layer unit is provided to emit visible light in a transition of the first excited state into at least one further, low-energy state, in particular a second excited state and / or a ground state. For example, several successive excitations are conceivable for producing a first excited state, which is preferably energetically highly excited. It is also conceivable that the effect of frequency doubling is used to produce a first excited state, which is preferably energetically highly excited. For example, at least one infrared laser could be used to generate the first excited state. In particular, the layer unit has at least one layer of an infrared-converting phosphorus compound. In particular, the phosphorus compound comprises at least portions of halogenated rare earth elements and / or alkaline rare earth metals activated by erbium ions. Alternatively or additionally, the layer unit has at least one photoconductive layer and / or one electroluminescent layer. For example, the photoconductive layer comprises proportions of cadmium selenide. For example, the electroluminescent layer shares of zinc sulfide. Alternatively, it is conceivable that the layer unit is provided to change by irradiation at least with infrared radiation, in particular only with infrared radiation, at least one transparency. Under "visible light" is to be understood in particular electromagnetic radiation from a wavelength range of 380 nm to 780 nm. As a result, in particular, an infrared radiation invisible to an operator can be used to illuminate at least one area of a domestic appliance having the domestic appliance device. In addition, advantageously, the base body in a simple manner for an operator visually perceptible areas.

In addition, it is proposed that the layer unit is formed at least partially fluorescent. Alternatively or additionally, it is conceivable that the layer unit is formed at least partially phosphorescent. By the use of the layer unit being "at least partially" fluorescently, it should be understood in particular that the layer unit has at least a proportion, in particular of more than 10%, advantageously more than 30%, preferably more than 50%, preferably more than 70%, at least one fluorescent substance. A "phosphorescent" and / or "fluorescent" layer unit is to be understood in particular as a layer unit which is intended to absorb the incident electromagnetic radiation during irradiation with electromagnetic radiation, in particular with UV radiation, and in turn electromagnetic radiation, in particular from a different wavelength range. In particular, a "fluorescent" layer unit is provided to sustain emission of electromagnetic radiation over a time interval of less than 10 ^-6 seconds after an end of the irradiation of electromagnetic radiation. In particular, a "phosphorescent" layer unit is provided to sustain an emission of electromagnetic radiation over a time interval of more than 10 ^-4 s after an end of the irradiation with electromagnetic radiation. As a result, in particular during and / or after irradiation with electromagnetic radiation, in particular with infrared radiation, emission of electromagnetic radiation of differing wavelength can be achieved, as a result of which advantageous illumination can be achieved.

Furthermore, it is proposed that the layer unit is at least partially formed as a coating. In particular, the layer unit is formed as a coating on the base body. In particular, the layer unit is arranged on the base body. Alternatively, it is conceivable that the layer unit is arranged on a metal plate, for example of aluminum, wherein the metal plate arranged on the base body, in particular attached to the base body, is. In this case, the metal plate could be arranged for example by means of a clamping connection, by means of a latching connection and / or by means of an adhesive connection to the base body. As an alternative, further connections of the metal plate to the main body, which appear appropriate to a person skilled in the art, are conceivable. In particular, the layer unit is arranged on the base body at least partially by means of an ink-jet printing method, advantageously by means of an ink jet printing method and / or by means of a screen printing method. Alternatively, the layer unit could be arranged on the base body by means of PVD. Also conceivable are further methods that appear appropriate to a person skilled in the art. By the use of the layer unit "at least partially" as a coating, it should be understood in particular that the layer unit has a mass fraction and / or volume fraction of more than 70%, in particular more than 80% and advantageously more than 90%. is designed as a coating. A "coating" is to be understood, in particular, as meaning a layer of a substance which adheres in particular to a surface of at least one component, in particular of the base body. In particular, the coating has a material thickness which is less than 10%, preferably less than 5% and in particular less than 1% of a material thickness of the component on which the coating is applied. In particular, the coating has an at least substantially constant material thickness. In particular, the coating has a material thickness of less than 1 mm, in particular less than 0.3 mm, advantageously less than 0.1 mm, preferably less than 0.03 mm and particularly preferably less than 0.01 mm. By the use of the coating having an "at least substantially constant material thickness", it should be understood in particular that an amount of the material thickness in the region of the coating of the component is less than 20%, in particular less than 10% and advantageously less as 5% changes. This can be achieved in particular a space-saving design.

Furthermore, it is proposed that the layer unit is transparent for at least a large part of visible light at least substantially. By the use of the layer unit being "transparent" for at least a large part of visible light, it should be understood in particular that the layer unit accounts for more than 70%, in particular more than 80% and advantageously more than 90% of one Spectrum of visible light is transparent. In particular, the layer unit is transparent to a visible light wavelength range of 380 nm to 750 nm of visible light. For example, the layer unit could be provided to reflect and / or absorb a wavelength range of visible light from 750 nm to 780 nm at least partially, in particular to a proportion of less than 20%. By the phrase that the layer unit is "transparent" for at least a large part of visible light, it should be understood in particular that the layer unit is intended to have a proportion of more than 70%, in particular more than 80% and advantageously more than 90% of a visible light arriving on a first side of the layer unit is transferred to a second side of the layer unit opposite to the first side. As a result, it is advantageously possible to achieve an inconspicuous layer unit which is invisible to an operator.

In addition, it is proposed that the layer unit is at least partially, in particular to a proportion of more than 70%, advantageously of more than 80%, preferably of more than 90%, inorganically formed. In particular, the layer unit is at least substantially temperature-resistant. An "at least substantially temperature-resistant" layer unit is to be understood in particular to mean that the layer unit is in a functional state up to a temperature of more than 150.degree. C., advantageously of more than 200.degree. C. and in particular of more than 250.degree. In particular, the layer unit is in a functional state up to a temperature of less than 0 ° C., in particular of less than -20 ° C., and advantageously of less than -30 ° C. In particular, the layer unit comprises at least one temperature-resistant material which has a melting point of more than 150 ° C, advantageously of more than 200 ° C and in particular of more than 250 ° C. A "functional" state of the layer unit should in particular be understood to mean that the layer unit is arranged on the base body and, upon irradiation with UV radiation, the incident infrared radiation at least partially into visible light converted. As a result, the layer unit can advantageously be used flexibly over a wide temperature range.

The layer unit is arranged on a rear side of the main body. A "back side" of the basic body is intended to be understood to mean a side of the basic body which faces away from the operator in an assembled, ready-to-use state. As a result, the layer unit can advantageously be arranged in a space-saving and protected manner against external influences occurring during operation on the rear side of the base body.

Further, the unit layer has a thickness of less than 800 microns, especially less than 650 microns, preferably of less than 500 microns, preferably of less than 400 micrometers is proposed. The unit layer has a thickness of more than 20 .mu.m, in particular of more than 30 microns, advantageously of more than 50 .mu.m. This can be achieved in particular a material savings and / or a space-saving design.

It is proposed a home appliance system with at least one home appliance device and with at least one light source, which is intended to activate the layer unit in at least one operating state, at least by means of infrared radiation. In particular, the home appliance system comprises at least two, in particular at least four, advantageously at least six, preferably at least eight light sources. In particular, the light source is provided in at least one operating state at least, preferably exclusively, for an emission of infrared radiation. In particular, the light source comprises at least one laser, advantageously at least one diode laser. Alternatively, further light sources appearing appropriate to a person skilled in the art are conceivable. In particular, the home appliance system comprises at least one scattering element at least to a widening of a light beam generated by the light source. In particular, the home appliance system comprises at least two, in particular at least four, advantageously at least six, preferably at least eight scattering elements, each of which is provided for widening a light beam generated by one of the light sources. In particular, a number of scattering elements corresponds to a number of light sources. In particular, the light source is intended to emit infrared radiation having a wavelength of more than 800 nm, in particular of more than 1000 nm, advantageously of more than 1250 nm, at least in one operating state. In particular, the light source is provided, at least in an operating state Infrared radiation having a wavelength of less than 10600 nm, in particular less than 9000 nm, preferably less than 7000 nm, preferably less than 5000 nm to emit. In particular, the layer unit and the light source are arranged at a distance. In particular, the layer unit and the light source are arranged spaced apart with respect to a first direction, which is aligned at least substantially perpendicular to the base body. Alternatively or additionally, it is conceivable that the layer unit and the light source are arranged spaced apart with respect to a second direction, which is aligned at least substantially parallel to the base body. In particular, the layer unit and the light source in at least one of the directions, alternatively or additionally in both directions, a distance of more than 1 cm, in particular more than 5 cm and advantageously more than 10 cm. The layer unit is intended to be illuminated by means of the light source from above and / or outside, namely from an at least in the installed state an operator facing side of the main body of. Alternatively, the layer unit is intended to be illuminated by means of the light source from the inside, namely by a light source arranged within the base body. Furthermore, it is conceivable that the layer unit is intended to be illuminated by means of the light source from below, in particular from an at least in the installed state an operator repellent side of the base body from. As a result, the layer unit can advantageously be activated safely, selectively and conveniently with a light source specially provided for this purpose.

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.

Fig. 1

ein erfindungsgemäßes Hausgerät mit einer erfindungsgemäßen Hausgerätevorrichtung in einer schematischen Draufsicht und

Fig. 2

einen Ausschnitt des erfindungsgemäßen Hausgeräts mit der erfindungsgemäßen Hausgerätevorrichtung aus Fig. 1 in einer schematischen Schnittdarstellung entlang der Linie II-II und

Fig. 3

das erfindungsgemäße Hausgerät mit der erfindungsgemäßen Hausgerätevorrichtung aus Fig. 1 in einem eingebauten Zustand in einer schematischen, perspektivischen Darstellung.

Show it:

Fig. 1

an inventive household appliance with a home appliance device according to the invention in a schematic plan view and

Fig. 2

a section of the household appliance according to the invention with the home appliance device according to the invention Fig. 1 in a schematic sectional view taken along the line II-II and

Fig. 3

the domestic appliance according to the invention with the domestic appliance device according to the invention Fig. 1 in a built-in state in a schematic, perspective view.

Fig. 1 shows a household appliance according to the invention 18, which is designed as a hob, with a domestic appliance device 10 according to the invention, which is designed as a hob device. Alternatively to a training as a hob, the home appliance could be designed as oven, microwave, refrigerator, freezer, washing machine, dryer and / or dishwasher. Also conceivable are other household appliances that appear appropriate to a person skilled in the art. The home appliance device 10, which is designed as a household appliance plate, has a main body 12, which is designed as a plate unit. The main body 12 is formed substantially transparent. Alternatively, it is conceivable that the main body has a substantially nontransparent and / or semi-transparent coating which extends on one side, in particular a back, of the main body over a large part of a surface of the main body. The domestic appliance 18 has a cover unit 26, which is fastened to the main body 12. The cover unit 26 and the main body 12 together form an outer housing of the domestic appliance 18. The domestic appliance 18 has four heating units 22 designed as inductors, which each form an independent heating zone. Three of the four heating units 22 are substantially circular in shape, and one of the four heating units 22 is formed substantially elliptical. In addition, the domestic appliance 18 has five operating elements 24 in a front area facing an operator in the installed state. The operating elements 24 are provided for input of operating parameters by the operator. For example, the operating parameters are designed as a selection and / or modification of a heating zone and / or as an adjustment of a heating power and / or heating power density of a heating zone.

The home appliance device 10, which is designed as an induction hob device, has nine layer units 14, which are each arranged on one side of the main body 12. The layer units 14 are arranged on a rear side 16 of the main body 12. For example, the layer units could each be designed as substantially thin plates and attached to the side of the base body, for example by means of an adhesive connection. In the present embodiment, the layer units 14 are partially formed as a coating. The layer units 14 are applied by means of an ink-jet printing method on the back 16 of the body 12.

The layer units 14 are partially infrared active and designed to partially convert infrared radiation into visible light. When irradiated with infrared radiation of sufficient energy, the layer units 14 partially absorb the infrared radiation and at the same time emit visible light. In the absence of irradiation with sufficient infrared energy, the layer units 14 are substantially transparent to a large portion of visible light. The layer units 14 change transparency upon irradiation with infrared radiation of sufficient energy. Here, the layer units 14 change a transparency from an invisible in an operator in the absence of irradiation of infrared energy energy into a visible state when irradiated with infrared radiation energy for an operator state. The layer units 14 are partially fluorescent. Alternatively, it is conceivable that the layer units are partially formed phosphorescent, wherein the layer units after irradiation with infrared radiation of sufficient energy for a period of more than 0.1 ms afterglow. For example, it is conceivable for the layer units to emit sufficient energy for a period of 1 min after irradiation with infrared radiation. The coating units 14 are arranged to emit visible light of different wavelengths when irradiated with infrared radiation. The layer units 14 emit visible light of different colors when irradiated with infrared radiation of sufficient energy. For example, the layer units could emit greenish, reddish, orange and / or bluish light. Also conceivable are other colors that appear appropriate to a person skilled in the art. A note issued by one of the layer units 14 color depends on a material composition of the respective layer units 14th

The layer units 14 are provided for displaying positions of specific areas of the main body 12. The layer units 14 are arranged in a vicinity of the special areas of the main body 12. Five of the layer units 14 are arranged in a vicinity of the operating elements 24, which are formed as the special area, and provided for displaying positions of the operating elements 24. The five layer units 14, which are in close proximity of the controls 24 are arranged, have a thickness of substantially 40 microns. Four of the layer units 14 are arranged in a vicinity of the heating zones formed by the heating units 22, which are formed as the specific area, and provided for indicating positions of the heating zones. The four layer units 14, which are arranged in a vicinity of the heating zones, have a thickness of substantially 100 μm. Due to the arrangement in a vicinity of the heating zones, high temperatures generated on the layer units 14 in an operating state of the heating units 22 forming the heating zones act. The layer units 14, which are partially inorganically formed, are substantially temperature-resistant and designed to withstand the high temperatures. Seven of the layer units 14 are substantially strip-shaped. Here, three of the seven layer units 14 substantially surround the specific area. Four of the seven layer units 14 partially surround the special area. Two of the nine layer units 14 each have twelve substantially circular-shaped partial regions, which are arranged distributed uniformly around the specific region and thus essentially surround the special region. As an alternative or in addition to displaying positions of the heating zones and / or positions of the operating elements, the layer units could be provided to indicate a position of a manufacturer's brand and / or a manufacturer's logo. As an alternative or in addition, further areas that appear appropriate to a person skilled in the art are conceivable.

The home appliance device 10, which comprises the main body 12 and the layer units 14, is part of a domestic appliance system (cf. Fig. 3 ). The home appliance system comprises the domestic appliance device 10 according to the invention and nine light sources 20, which are provided to activate the layer units 14 by means of infrared radiation in an operating state. A number of light sources 20 and a number of layer units 14 are substantially the same. Alternatively, it is conceivable that a number of light sources is dependent on a size and / or shape of a single layer unit. It is also conceivable that a single light source is provided, which is intended to activate all layer units in an operating state by means of infrared radiation. In this case, for example, a scattering element and / or beam splitter could be attached to the light source in order to widen a light beam generated by the light source. In particular, by means of the scattering element and / or beam splitter, In particular by means of the expanded light beam, diffused light are generated in order, in particular, to illuminate the base body at least partially, in particular at least for the most part, advantageously completely. In particular, the main body is divided into several subregions, each light source illuminating one of the subregions. In particular, the subregions illuminated by the light sources are designed to overlap, in particular in order to achieve a high degree of flexibility and / or a high degree of design diversity. The light sources 20, each comprising a laser, are intended to emit in an operating state infrared radiation having a wavelength of substantially 800 nm.

The light sources 20 and the layer units 14 are arranged at a distance. The light sources 20 and the layer units 14 are arranged spaced from each other with respect to a direction oriented substantially perpendicular to the base body 12. Alternatively or additionally, it is conceivable that the light sources and the layer units are arranged at a distance from each other with respect to a direction oriented substantially parallel to the base body. The light sources 20 are arranged in a fume hood 28. The domestic appliance system comprises the extractor hood 28, which is arranged at a distance from the main body 12 in a direction oriented essentially perpendicular to the main body 12. In this case, the extractor hood 28 is arranged above the main body 12. Alternatively, the light sources could be arranged in the cover unit. It is also conceivable that the light sources are integrated in the base body. In this case, the light sources could be arranged, for example, between the heating units and / or with the operating elements and / or in a middle of the base body. It is also conceivable that an infrared radiation emitted by infrared sensors of the operating elements is used to activate the layer units. For example, an infrared radiation emitted by a heated cooking utensil and / or by the base body, which is heated by the cooking utensil, could be used to activate the layer units, provided that this infrared radiation has sufficient energy.

In one embodiment of the invention, it is conceivable that the layer unit is arranged at least substantially over an entire side, in particular the back, of the base body. Here special areas could be marked by laser writing. In particular, the light source by means of a movable Light beam, in particular laser beam to produce markings of any shape. For example, an output of operating parameters, in particular a heating power and / or a heating power density, could be generated by means of the movable light beam of the light source, in particular to replace an output unit.

reference numeral

10

Home appliance device

12

body

14

layer unit

16

back

18

household appliance

20

light source

22

heating unit

24

operating element

26

capping

28

hood

Claims (8)

1. Household appliance system having at least one cooktop plate and a light source (20), wherein the cooktop plate has at least one main body (12) and at least one layer unit (14), which is arranged on at least one side of the main body (12), wherein the layer unit (14) is embodied to be at least partially infrared-active and wherein the layer unit (14) is arranged on a rear side (16) of the main body (12), wherein a side of the main body (12) facing away from an operator in an assembled state ready for operation is to be understood as the rear side (16), characterised in that the light source (20) is provided, in at least one operating state, to activate the layer unit (14) at least by means of infrared radiation and to illuminate from above and/or from the outside, namely from a side of the main body (12) facing an operator in the installed state, or wherein in at least one operating state the light source (20) is provided to activate the layer unit (14) at least using infrared radiation, and to illuminate from the inside, namely from a light source (20) arranged inside the main body (12), wherein the layer unit (14) has a thickness of more than 20 µm.
2. Household appliance system according to claim 1, characterised in that the layer unit (14) is provided to convert infrared radiation at least partially into visible light.
3. Household appliance system according to one of the preceding claims, characterised in that the layer unit (14) is embodied to be at least partially fluorescent.
4. Household appliance system according to one of the preceding claims, characterised in that the layer unit (14) is embodied at least partially as a coating.
5. Household appliance system according to one of the preceding claims, characterised in that the layer unit (14) is embodied to be at least substantially transparent for at least most visible light.
6. Household appliance system according to one of the preceding claims, characterised in that the layer unit (14) is embodied to be at least partially inorganic.
7. Household appliance system according to one of the preceding claims, characterised in that the layer unit (14) has a thickness of less than 800 µm.
8. Household appliance system according to one of the preceding claims, characterised in that the light source (20) comprises at least one laser.

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