Cooktop with an integrated extractor and illumination, use of the cooktop for illumination

Abstract

The invention relates to a cooktop (10) with integrated illumination, comprising at least cooktop plate, in particular a glass ceramic plate (1), having at least one cooking zone (14) and with an upper side (2), onto which cookware can be placed, and with a lower side (3) facing away from the upper side (2), at least one heating device, in particular an induction coil (4), arranged below the cooktop plate (1) and serving to heat the cookware, at least one extraction opening (30) of an extraction shaft (31) which is provided at least substantially in the plane of the surface of the cooktop plate (1) and serves to extract and transmit cooking vapors or cooking steam downward to below the cooktop plate (1) and at least one light source (40) for shining out of the cooktop (10) for the integrated illumination. According to the invention, the at least one light source (40) is arranged substantially within at least one extraction shaft (31).

Description

[0001] Description: Hob with integrated extractor and with lighting, use of the hob for lighting

[0002] The invention relates to a hob with an integrated extractor and with lighting according to the preamble of claim 1. The invention further relates to the use of the hob for lighting according to claim 13.

[0003] A generic hob has a generally rectangular hob plate with a surrounding outer edge. One or more heating devices are provided beneath the hob plate; for example, radiant heating devices or induction heating coils can be provided, which are attached to an underside of the hob plate. Furthermore, a hob housing is located beneath the hob plate or rests on the underside, in which a hob control and a power supply for the hob control and the heating devices are arranged. Advantageously, the hob housing can also contain the heating devices or cover them at the bottom, as is known per se. A frame can be provided on the outer edge of the hob plate, advantageously surrounding it, wherein the frame is designed for connection to a worktop when the hob is arranged on or in the worktop.

[0004] Such hobs are already known in a variety of designs from the prior art.

[0005] For example, a hob with at least one temperature sensor is known from DE 10 2019 123 703 A1.

[0006] DE 10 2020 212 171 A1 concerns a hob with weight sensors.

[0007] A sensor-controlled hob with a vibration sensor is known from DE 20 2005 015 553 U 1. DE 10 2019 107 558 A1 relates to a method for operating a cooking zone of a hob, preferably an induction hob, with a cookware item.

[0008] From DE 10 2010 064 294 A1 a hob and a method for controlling an energy supply to a heating element of a hob are known.

[0009] According to DE 10 2004 01 1 749 A1, a cooktop with multiple cooking zones and associated heaters is designed in such a way that associated, for example, inductive or capacitive cooking vessel detection sensors detect the touching of a placed cooking vessel by a finger or the like. This is interpreted by the cooktop control system as the selection of the respective cooking zone.

[0010] DE 20 2019 106 084 U 1 discloses a cooking surface with a downdraft extractor hood, which has a top and a bottom and comprises: a plurality of cooking zones located near the surface, an intake duct extending in a predetermined direction of extension between the top and the bottom, wherein the intake duct has an intake opening near the top and is in fluid communication with the outside area. The cooking surface also comprises a device that forms a mounting unit for the cooking surface with the surface for operating it and for allowing cooking vapors to be drawn downwards.

[0011] DE 1 579 679 A1 discloses a device for extracting fumes and steam generated during cooking from a cooking stove using a suction fan. EP 3 869 107 A1 discloses an assembly unit with a cooking hob and a device for operating a cooking hob and for extracting cooking fumes downwards.

[0012] DE 10 2020 208 221 A1 discloses a hob with a hob plate and light sources underneath that can be controlled in different ways. For this purpose, light sources are provided that radiate outward from the hob, radiating through the hob plate or past the side of the hob plate.

[0013] The disadvantage here is the comparatively high light output of the light sources radiating out of the cooktop. Furthermore, the light sources experience power losses due to the glass ceramic plate. Furthermore, the desired light color is unintentionally altered due to the glass ceramic plate of the cooktop, which also has aesthetic disadvantages.

[0014] The light sources known from the prior art, which are arranged to the side of the glass ceramic plate, are not suitable for homogeneous illumination of the area above the hob plate, since they only radiate past the hob plate, in particular horizontally or at a shallow angle.

[0015] Based on the disadvantages described above, the object of the invention is to provide a hob plate with integrated ventilation, which has energetically optimal and aesthetically pleasing lighting.

[0016] This object is achieved with a hob with integrated extractor and with lighting according to claim 1. This object is further achieved by the use of the hob according to claim 13. The invention relates to a hob with integrated lighting, comprising a hob plate having at least one cooking zone, in particular a glass ceramic plate, with an upper side on which cookware can be placed and with an underside facing away from the upper side.

[0017] Furthermore, the hob has at least one heating device arranged below the hob plate, in particular an induction coil, for heating the cookware.

[0018] In addition, at least one suction opening of a suction shaft is provided substantially in the plane of the surface of the hob plate for sucking in and passing on cooking fumes or steam downwards below the hob plate.

[0019] At least one light source is used to radiate out from the hob for the integrated lighting.

[0020] According to the invention, the at least one light source is arranged substantially within at least one intake shaft or intake opening.

[0021] The lighting can be used to illuminate the room as ambient lighting. The brightness and / or color can be adjusted using the fan speed.

[0022] The lighting can also perform functions such as a residual heat indicator. The brightness or light color can be adjusted depending on the temperature.

[0023] An indicator function is also possible, for example, a flashing light after a cooking zone or egg timer has expired, either as a supplement to or in place of an acoustic signal. The lighting can also be used to generate a warning signal after a defined period of time in which at least one cooking zone is switched on but no further operation is performed. This can, for example, remind elderly or forgetful people that cooking has begun, as a kind of "dead man's switch" before the cooktop is possibly switched off completely.

[0024] The hob is preferably designed as an induction hob, as these can be controlled very precisely and directly. However, implementation with other heating technologies is also encompassed by the invention.

[0025] According to a first advantageous embodiment of the invention, the at least one light source emits the light by means of optical fibers from the intake shaft of the cooking hob, in particular the at least one light source for indirect lighting is arranged laterally inside or below at the bottom of the intake shaft or the intake opening.

[0026] The light sources can be positioned laterally inside or at the bottom of the floor to illuminate diagonally or indirectly from the ventilation shaft.

[0027] A further advantageous variant of the invention provides that the light sources comprise LEDs or consist of LEDs or LED strips.

[0028] In an advantageous development of the invention, the at least one light source can be controlled by means of a light control, wherein preferably a communication device can be connected to the light control and is designed to communicate with an external control device / receiver, preferably wirelessly via WLAN, Bluetooth or the like.

[0029] The lighting control is designed to, after receiving a

[0030] Control signal through the communication device to control the light sources in such a way that they radiate out from the hob into the space around the hob to generate room or background lighting.

[0031] According to a further advantageous embodiment of the invention, the light control for the bidirectional transmission of data is connected to a control and / or regulating device for controlling and / or regulating the energy of the heating device of the hob.

[0032] A further advantageous embodiment of the invention provides that the at least one light source can be operated by means of an operating element, in particular an operating sensor, wherein the operating element is arranged below the hob plate and is preferably designed as a capacitive sensor for operation on the surface of the hob plate.

[0033] It can also be provided that the brightness and / or light color of the at least one light source is / are adjustable, in particular that the light color is adjustable automatically, for example depending on ambient noise.

[0034] With regard to the attachment or arrangement of a light source in the hob according to the invention, the essential and preferred aspects of the present invention can be summarized as follows:

[0035] The lighting (light source) is installed in the ventilation shaft and shines directly through the ventilation opening into the room, not through the glass-ceramic surface. This has the advantage that the light color cannot be distorted by the filtering effects of the glass-ceramic surface, nor does it require the use of a special glass-ceramic without such filtering effects. Furthermore, the light intensity is not affected by the glass-ceramic surface.

[0036] The lighting can consist of one or more light sources. The light sources can preferably consist of individual LEDs or LED strips.

[0037] The light sources shine directly into the ventilation shaft without the need for the light to be guided through fiber optic cables.

[0038] The light sources can be protected with a transparent cover (e.g. glass or plastic) to prevent contact and for easy cleaning.

[0039] The light sources can be installed directly below the hob surface or further down in one or more walls or in the floor of the ventilation shaft.

[0040] Also advantageous is an embodiment according to the invention in which the at least one suction opening lies in a plane parallel to the surface of the top side of the hob plate.

[0041] In an advantageous embodiment of the invention, it is provided that the at least one intake opening is designed in the shape of a slot, in particular in the form of a joint or outflow joint, wherein preferably adjacent slot-shaped intake openings are arranged approximately at right angles to one another.

[0042] According to a further advantageous embodiment of the invention, the at least one suction opening is arranged approximately centrally on the hob.

[0043] A further advantageous embodiment of the invention provides that the at least one intake opening is fluidly connected to an extraction chamber with a rotating fan wheel of a fan motor for extracting cooking vapors or fumes. Also advantageous is an embodiment of the invention in which a sensor system comprising at least one sensor is provided for temperature measurement and / or for measuring movements / vibrations and / or for weight measurement, in particular wherein the sensor system is connected to the control and / or regulating device in a signal-transmitting manner.

[0044] The sensors can be located underneath the cooktop, preferably between the underside of the cooktop and the heating element, and / or to the side of the heating element. This allows for optimal use of the installation space. The lateral arrangement reduces the potential influence of the alternating magnetic field on the sensors in induction cooktops.

[0045] The sensor system can comprise at least one temperature sensor for directly determining the temperature beneath the hob plate, in particular on the underside of the hob plate, and / or at least one infrared sensor for determining the pot bottom temperature through the hob plate, in particular the glass ceramic plate.

[0046] In the control and / or regulating device, the energy required by the heating device for heating the cookware for a desired cooking process can be determined depending on this specific hob plate temperature and / or the determined temperature of the food to be cooked.

[0047] By means of the at least one heating device controlled by the control and / or regulating device, the energy required for a desired cooking process can be automatically delivered to the hob plate.

[0048] Particularly advantageously, the processing and evaluation of the sensor signals takes place in the electronics or control and / or regulation system in the cooktop, which then regulates the cooking zones accordingly. Induction cooktops can also include a pan detection function, without which no power is switched on and no calculations are performed.

[0049] To increase accuracy, each sensor can be present multiple times.

[0050] An independent idea of ​​the invention relates to the use of a previously described hob for illuminating a room in which the hob is arranged, by means of at least one light source arranged in the hob.

[0051] Further objects, advantages, features, and possible applications of the present invention will become apparent from the following description of an exemplary embodiment with reference to the drawing. All described and / or illustrated features, individually or in any meaningful combination, constitute the subject matter of the present invention, regardless of their summary in the claims or their interrelationship.

[0052] Some of them are shown schematically:

[0053] Figure 1 shows a hob with suction shaft and light sources in perspective view,

[0054] Figure 2 shows the hob according to Figure 1 in another view,

[0055] Figure 3 is a further illustration of the hob according to Figure 1,

[0056] Figure 4 shows the hob according to Figure 1 in plan view,

[0057] Figure 5 shows the hob according to Figure 1 in a representation without

[0058] glass ceramic plate,

[0059] Figure 6 shows the hob according to a further embodiment in a) top view, b) a first side view and c) a further side view and

[0060] Figure 7 shows the hob according to Figure 6 without a glass ceramic plate.

[0061] In the following figures of the drawing, identical or equivalent components are provided with reference numerals based on an embodiment in order to improve readability.

[0062] Figure 1 shows a hob 10 in a perspective view obliquely from above with a hob plate 1, which in this case is designed as a glass ceramic plate 1 and, in the selected embodiment, has four cooking zones 14. Cookware (not shown) can be placed on the top side 2 of the hob plate 1. The cooking zones 14 are provided with a marking 7 on the top side 2 of the glass ceramic plate 1 (see Figures 1 and 6). The hob plate 1 has a bottom side 3 facing away from the top side 2.

[0063] Figure 2 shows the hob 10 in another perspective view, also from above.

[0064] Figure 3 shows the hob 10 according to Figures 1 and 2 in a view from above, but a cover grille 32 of an intake opening 30 for an intake shaft 31 is hidden for better clarity.

[0065] Figure 4 is a representation of the hob 10 according to Figures 1 - 3 in a plan view from above.

[0066] Figure 5 shows the hob 10 according to the embodiment of Figures 1-4, but for better understanding the hob plate 1 has been hidden in order to be able to clearly see the components arranged below the hob plate 1.

[0067] Figure 5 shows at least one heating device arranged beneath the cooktop plate 1 for heating the cookware, which in this case is designed as an induction coil 4. A control and / or regulating device 6 is provided for controlling and / or regulating the energy of the heating device 4. Figure 5 further illustrates the cooktop 10 with the four cooking zones 14. Also visible is the operating unit 8 for the control and regulating device 6.

[0068] A sensor system 5 has at least one sensor for measuring temperature and / or for measuring movements / vibrations and / or for measuring weight, as also shown in Figure 5. The sensor system 5 is connected to the control and / or regulating device 6 for signal transmission.

[0069] The hob 10, in particular the hob plate 1, can have a function key shown under position 9 for activating, switching over and switching off the light functions in order to switch between the light functions and the conventional operation with the light function deactivated when pressed.

[0070] Figures 1-5 further show an intake opening 30 provided essentially in the plane of the surface of the hob plate 1 for sucking in and conveying cooking vapors or steam downwards beneath the hob plate 1. The intake opening 30 is located in a plane parallel to the surface of the top side 2 of the hob plate 1. The intake opening 30 is part of an intake shaft 31, which can be closed by a cover grille 32 (see Figs. 1 and 2).

[0071] The intake opening 30 shown in the present embodiment is slit-shaped, particularly in the form of a gap or discharge gap. Multiple intake openings are also conceivable, with adjacent slit-shaped intake openings 30 being arranged approximately at right angles to one another.

[0072] In the present case, the suction opening 30 is arranged approximately centrally on the hob 10 and extends along the width of the hob plate 1.

[0073] The intake opening 30 is fluidly connected to an extraction chamber with a rotating fan wheel (ventilation motor) for extracting cooking fumes or vapors downwards. In the embodiment shown in Figures 1-5, a fan housing 13 can be seen, which houses the fan motor. This housing 13 is arranged below the cooktop plate 1 on a substructure frame 15 of the cooktop 10.

[0074] Furthermore, Figures 1-5 show several light sources 40 for radiating out of the cooktop 10 for integrated lighting. These light sources 40 are arranged essentially within the intake shaft 31 or the intake opening 30.

[0075] This lighting can illuminate the room as ambient lighting. The brightness and / or color can be adjusted with the fan speed. The lighting can also perform functions such as a residual heat indicator, with the brightness or color of the light changing depending on the temperature.

[0076] The lighting can also serve as an indication function, for example as a flashing light after a cooking zone or egg timer has expired, as a supplement to or replacement for an acoustic signal.

[0077] Furthermore, the lighting can be designed as a warning function, for example, after a defined period of time in which at least one cooking zone is switched on but no further operation is performed. This can, for example, remind elderly or forgetful people that cooking has begun, as a kind of "dead man's switch" before the hob is possibly switched off completely.

[0078] In the present exemplary embodiment, the light sources 40, designed as LEDs, emit light from the cooktop 10 via optical fibers, controlled by a light controller 41. As can be seen in particular from Figures 1-4, the light sources 40 are arranged laterally within the intake opening 30 in the intake shaft 31 for indirect illumination. The light sources 40 can therefore be arranged laterally to illuminate obliquely or indirectly, or from below to illuminate directly from the intake shaft 31.

[0079] The light sources 40 can be controlled by means of the light control 41 shown in Figure 5. A communication device is connected to the light control 41 and is configured to communicate with an external control device / receiver, preferably wirelessly via WLAN, Bluetooth, or the like.

[0080] The light control 41 is designed, after receiving a control signal from the communication device, to control the light sources 40 in such a way that they radiate out of the cooking surface 10 into the space around the cooking surface 10 to generate room or background lighting.

[0081] In the present case, the light control 41 is connected for bidirectional transmission of data to a control and / or regulating device 6 for controlling and / or regulating the energy of the heating device 4 of the hob 10.

[0082] From Figure 5 it can further be seen that the at least one light source 40 can be operated by means of an operating sensor 9.

[0083] The brightness and / or light color of the at least one light source 40 are adjustable, in particular, the light color is adjustable automatically, for example depending on ambient noise.

[0084] Figure 5 further shows the sensor system 5 provided for measuring temperature and / or for measuring movements / vibrations and / or for measuring weight, in particular that the sensor system 5 is connected to the control and / or regulating device 6 in a signal-transmitting manner. Figures 6 and 7 show a further exemplary embodiment of the hob 10. Figure 6 shows this exemplary embodiment in a) top view, b) a first side view and c) a further side view. In contrast to the variant according to Figures 1-5, the hob 10 according to Figures 6 and 7 does not have a ventilation motor integrated into the hob 10. Here, the ventilation motor is not arranged below the hob plate 1 on a frame 15 of the hob 10, but can be arranged externally, for example in a separate housing on a wall or in a cabinet base.

[0085] The present hob 10 can be used to illuminate a room in which the hob 10 is arranged due to the light sources 10 arranged in the hob 10.

[0086] Reference symbol list

[0087] 1 hob plate

[0088] 2 Top

[0089] 3 Bottom

[0090] 4 Heating device / induction coil

[0091] 5 Sensor technology

[0092] 6 Control and / or regulating device

[0093] 7 cooking zone markings

[0094] 8 Control unit

[0095] 9 Operating sensor

[0096] 10 hob

[0097] 12 Generator

[0098] 13 Fan housing

[0099] 14 cooking areas

[0100] 15 frames

[0101] 30 intake opening

[0102] 31 Intake shaft

[0103] 32 cover grilles

[0104] 40 light source

[0105] 41 Lighting control

Claims

Patent claims 1. A hob (10) with integrated lighting, comprising a hob plate having at least one cooking zone (14), in particular a glass ceramic plate (1), with an upper side (2) on which cookware can be placed and with an underside (3) facing away from the upper side (2), at least one heating device, in particular an induction coil (4), arranged below the hob plate (1) for heating the cookware, at least one suction opening (30) of a suction shaft (31) provided substantially in the plane of the surface of the hob plate (1) for sucking in and forwarding cooking vapors or steam downwards beneath the hob plate (1), at least one light source (40) for radiating out of the hob (10) for the integrated lighting, characterized in that the at least one light source (40) is arranged substantially within at least one suction shaft (31).

2. Hob (10) according to claim 1, characterized in that the at least one light source (40) emits the light by means of light guides from the intake shaft (31) of the hob (10), in particular that the at least one light source (40) for indirect lighting is arranged laterally within the intake shaft (31).

3. Hob (10) according to claim 1 or 2, characterized in that the light sources (40) comprise LEDs or consist of LEDs or LED strips.

4. Hob (10) according to one of claims 1 to 3, characterized in that the at least one light source (40) can be controlled by means of a light control (41), wherein preferably a communication device can be connected to the light control (40) and is designed to communicate with an external control device / receiver, preferably wirelessly via WLAN, Bluetooth or the like.

5. Hob (10) according to one of the preceding claims, characterized in that the light control (41) is connected for the bidirectional transmission of data to a control and / or regulating device (6) for controlling and / or regulating the energy of the heating device (4) of the hob (10).

6. Hob (10) according to one of the preceding claims, characterized in that the at least one light source (40) can be operated by means of an operating element, in particular an operating sensor (9), wherein the operating element (9) is arranged below the hob plate (1) and is preferably designed as a capacitive sensor for operation on the surface of the hob plate (1).

7. Hob (10) according to one of the preceding claims, characterized in that the brightness and / or light color of the at least one light source (40) is / are adjustable, in particular that the light color is adjustable automatically, for example as a function of ambient noise.

8. Hob (10) according to one of the preceding claims, characterized in that the at least one suction opening (30) lies in a plane parallel to the surface of the upper side (2) of the hob plate (1).

9. Hob (10) according to one of the preceding claims, characterized in that the at least one suction opening (30) is slit-shaped, in particular in the form of a joint or outflow joint, wherein preferably adjacent slit-shaped suction openings (30) are arranged approximately at right angles to one another.

10. Hob (10) according to one of the preceding claims, characterized in that the at least one suction opening (30) is or are arranged approximately centrally on the hob (10). 1 1. Hob (10) according to one of the preceding claims, characterized in that the at least one suction opening (30) is in fluid communication with an extraction chamber having a rotating fan wheel of a fan motor for extracting the cooking fumes or vapors.

12. Hob (10) according to one of the preceding claims, characterized in that a sensor system (5) comprising at least one sensor is provided for temperature measurement and / or for measuring movements / vibrations and / or for weight measurement, in particular that the sensor system (5) is connected to the control and / or regulating device (6) in a signal-transmitting manner.

13. Use of a hob (10) according to one of claims 1 to 12 for illuminating a room in which the hob (10) is arranged, by means of at least one light source arranged in the hob (10).

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