EP3453975B1 - Cooking hob and arrangement of a cooking hob in a worktop - Google Patents

Description

Field of application and state of the art

The invention relates to a hob with a hob plate and heating devices arranged underneath, as well as an arrangement of such a hob in a worktop.

From the DE 102015226052 A1 or the EP 3182020 A1 a corresponding hob including an arrangement in a worktop is known, the hob being designed as a weighing device, so to speak. With this arrangement, a hob according to DE 102012216935 A1 be improved, namely by taking into account a conflict between, on the one hand, a weighing process that is as error-free and unimpaired as possible and, on the other hand, a hob, in particular with its electrical functional units, is to be sealed. After all, when cooking it can quickly happen that liquid boils over and spreads on the hob. The penetration of such liquid into the hob or into the electrical functional units would be very harmful. At the same time, however, there is the DE 102012216935 A1 recognizable problem of a falsification of the weight measurement by a seal.

From the WO 2017/051509 A1 a hob is known with a hob plate and heating devices arranged below it. The hob is built into a worktop in a cutout in which the hob is sunk, the hob plate with a circumferential outer edge overlapping an edge area of the worktop around the cutout. In this cutout it is inserted with a receiving trough on which the hob is mounted or rests by means of mountings in which weight sensors are provided. The bearings are arranged in an outer edge area of the receiving trough.

From the EP 2 802 190 A1 is another hob known with a receiving tray. A cooking vessel can be placed on a hob plate for cooking. A heating device is arranged underneath in order to heat the cooking vessel. According to the Fig. 1 weight sensors are provided on a horizontal weighing beam. One end of these weighing beams is supported on an actuator, against which they measure the weight of the hob plate. When measuring the weight, the actuator is used to lift the hob plate off the worktop, on which it normally rests with an edge including a seal. If no weight measurement is carried out, the hob plate is lowered back onto the worktop.

Task and solution

The invention is based on the object of creating a hob as mentioned at the beginning and an arrangement of such a hob in a worktop mentioned at the beginning, with which problems of the prior art can be solved and in particular it is possible to design or tightly design a hob with a so-called weighing function. to prevent liquid from penetrating the hob or the electrical functional units.

This object is achieved by a hob with the features of claim 1 and an arrangement with the features of claim 14. Advantageous and preferred embodiments of the invention are the subject matter of the further claims and are explained in more detail below. Some of the features are only explained for the hob or only for the arrangement of such a hob in a worktop. However, they should be able to apply independently and independently of one another both to a hob and to such an arrangement. The wording of the claims is made part of the content of the description by express reference.

It is provided that the hob has a hob plate and heating devices arranged below it. Furthermore, a receiving trough is provided under the hob plate, in particular in the arrangement according to the invention, wherein this receiving trough can preferably also be part of the hob. The hob plate covers the heating devices or advantageously extends over them, as is usual for a hob. The hob plate and the heating devices are part of a structural unit, which means that they form a structural unit with one another, although other parts or functional units also belong to it. This structural unit is advantageously integrated and can be at least partially closed. In particular, this structural unit can be sealed against the ingress of liquid from above, so that it does not necessarily have to be completely sealed all around. An operating device for the hob is also part of such a structural unit. This operating device can be arranged inside the receiving tray.

The receiving trough can contain the heating devices or these can be surrounded by the receiving trough, at least in the lateral direction, in particular also the structural unit. The aforementioned operating device is thus advantageously also surrounded by the receiving tray, in particular the receiving tray runs below the heating devices and / or the operating device.

According to the invention, the structural unit is mounted in or on the receiving trough by means of supports. Weight sensors are provided or arranged on these supports, so they can have weight sensors in order to measure a weight load on the supports. This can advantageously be designed in a fundamentally similar manner as in the aforementioned DE 102015226052 A1 or DE 102012216935 A1 . At least three supports, each with weight sensors, should be provided, advantageously four supports for a rectangular hob, one in each corner area.

Furthermore, the receiving trough has an outer circumferential tub rim that is raised. This achieves the shape of the receiving pan. With this tub edge, the receiving tub and thus also the hob can be arranged on a worktop or in a worktop or in a corresponding cutout. The cutout can have a size that corresponds to the receiving trough, so that it can be used well. The tub edge can run relatively close to the inner edge of the cutout.

An outer edge or an edge of the hob plate is at a distance from the tub edge in a direction parallel to the hob plate, that is, a lateral distance. This lateral distance is advantageously given on all sides of the hob plate, that is to say circumferentially or continuously. Such a distance can particularly advantageously be 1 mm to 50 mm, preferably 10 mm to 30 mm. This distance separates the movably mounted hob plate from the fixed tub rim in order to enable this free mobility for weight measurement. With commonly used weight sensors made of piezoceramic or with strain gauges, relatively little mobility is sufficient for a weight measurement, for example less than 1 mm or even less than 0.1 mm. The most important thing about this mobility is that it is as free as possible.

The invention thus achieves, on the one hand, that the heating devices, possibly also an operating device and a power control for the heating devices, are combined as a structural unit and are largely protected, in particular against the ingress of liquid. Due to the lateral spacing of the hob plate, on the underside of which the remaining structural unit or its components are advantageously attached or attached, to the tub edge of the receiving tub, this structural unit is, so to speak, freely movable for an undistorted weight measurement. Liquid which has leaked onto the hob plate and which can flow downwards past the hob plate due to the aforementioned distance to the edge of the hob can be collected in the receiving tray or, in addition to an arrangement or storage of the structural unit with hob plate and heating devices, the receiving tray can have a collecting function . In this way, it can also be prevented that liquid or the like underneath the hob in base cabinets arranged underneath. can penetrate.

In an embodiment of the invention, it is possible that an inner housing is provided under the hob plate, which is firmly connected to the hob plate. The inner housing can be part of the aforementioned integrated and closed structural unit and, under certain circumstances, can be largely sealed. It can be glued to the underside of the hob plate or screwed or otherwise fastened to holding devices glued on there. The heating devices are arranged in this inner housing, advantageously also an aforementioned operating device or control or power control. The inner housing advantageously surrounds these functional units. The inner housing is particularly advantageously arranged completely within the receiving trough and can be located below the aforementioned rim of the trough. Thus, the receiving trough advantageously does not belong to the aforementioned structural unit, but just receives it. The weight measurement then takes place, so to speak, from the hob plate relative to the receptacle, which is why the receptacle is fixed to the worktop should be arranged. At the same time, however, it can be provided that the structural unit or the inner housing is not arranged loosely in the receiving trough, but at least at fixed points. More on this is explained below.

In one embodiment of the invention, it is possible for support projections to protrude from the inner housing, in particular to the side or downward. These support projections can be placed on the supports or on weight sensors which are arranged in the receiving trough. A support vertically downwards is regarded as advantageous. However, since the connection effort for the weight sensors is then possibly greater if they are outside the inner housing and possibly fixedly arranged on the receiving trough, it is possible in an alternative embodiment for support projections to protrude from the receiving trough. In particular, they protrude from a base of the receiving trough, that is to say advantageously vertically upwards. The inner housing or the integrated structural unit then rests on or on these support projections with weight sensors which are arranged at the bottom of the inner housing or in the inner housing. The weight sensors can thus be arranged on or in the inner housing, which is structurally simpler, in particular also with regard to an electrical connection. The support projections can then be part of the supports or form them.

In the case of the invention, the tub has a circumferential channel within its tub rim and directly adjoining it inward, which runs deeper than the plane of the hob plate. This channel can catch leaked liquid, which then overflows, so to speak, at the edge of the hob plate and runs or drips downwards, in particular due to the previously described lateral distance to the edge of the tub. This prevents this liquid from running all the way down into the receptacle; it collects in the channel and, above all, further up. It can therefore be removed more easily. The channel is advantageously a separately manufactured part and is attached to the receiving trough. Since such receiving troughs and also channels are usually made of metal, this enables simplified production. Such a channel should advantageously be designed to be sealed all around in order to prevent water from getting directly into the receptacle, at least as long as it does not overflow.

According to the invention, such a channel extends to below the outer edge of the hob plate or a circumferential aforementioned frame part provided on the outer edge of the hob plate. An overlap in the lateral direction parallel to the hob plate can be between 2 mm and 30 mm, in particular between 5 mm and 10 mm. Thus the channel runs partially outside of the hob plate and outside of the inner housing, but reaches under the hob plate at least to such an extent that liquid that runs down or drips is caught by it. If the hob plate has an aforementioned circumferential frame part on an outer edge, as is often the case for hob plates, for example as a strip made of aluminum or stainless steel, which is usually glued to the hob plate, the channel should extend just below this frame part or its outer edge . A channel can have a width of approximately 10 mm to 30 mm.

In one embodiment of the invention it can be provided that a drainage line branches off downward from the channel. Such a drainage line can for example be a flexible hose and advantageously run to a drainage of a sink in the kitchen that is located in the vicinity. Liquid located in the channel can be disposed of immediately, so to speak, which can also prevent a very large amount of liquid from collecting, the channel then overflowing and the liquid nevertheless running into the receiving trough located below. For such a drainage line, the channel can have a gradient to a lowest point from which the drainage line then branches off downwards. Alternatively, liquid must or the like from the channel by means of a sponge cloth or rag. removed.

In an advantageous embodiment of the invention, a frame part as described above can be provided on the outer edge of the hob plate, which frame part is designed to be circumferential. Such a frame part can consist of metal, in particular stainless steel or aluminum, advantageously as the usual thin sheet metal. It can either just be flat and placed on top of the hob plate along the outer edge. Alternatively, the frame part can be angled at least once and also cover the outer edge surface of the hob plate, in particular also to protect it against mechanical damage. In a particularly advantageous embodiment, the frame part can then be pulled further down at the bend with a so-called drip edge, the frame part reaching below the plane of the underside of the hob plate. Especially when a frame part is made of flat material or thin sheet metal, this results in a relatively narrow drip edge with an advantageous function.

The channel in turn can advantageously have an upwardly drawn inner edge, this inner edge running within the outer edge of the hob plate without a frame part or within a frame part described above or within the above-described drip edge, so to speak engaging under it. The inner edge of the channel can have an upper inner edge which runs above the drip edge or is higher than it, that is to say it engages under and engages behind it. In this way, it can be prevented very reliably that liquid can, so to speak, get over the barrier of the channel and down into the receptacle.

A frame part described above can run with a support section parallel to the hob plate and thus be placed on the upper side of the hob plate along the outer edge. Gluing is an advantageous attachment. The frame part can then be angled at least once outside the hob plate, advantageously downwards, for example with a length of 5 mm to 20 mm. The aforementioned drip edge can then be formed on the lower edge. Furthermore, the inner housing is optically closed to the side if an operator looks into the channel at an angle from the side.

Alternatively, although a frame part can also be angled downwards at least once and run parallel to the hob plate with a contact section, it can, however, be placed and fastened along the outer edge of the hob plate on its underside. Gluing is also an option here. Such a frame part on the underside of the hob plate then only forms a named drip edge, a protective effect or the like. for the outer edge of the hob plate is then not given.

In a preferred embodiment of the invention, the channel is at least partially covered or closed at the top with a cover. The cover can advantageously be designed continuously as a kind of frame or ring-shaped, alternatively it can form such a ring shape with several individual parts. A surface of the cover can be parallel to the hob plate, then advantageously in the same plane as the top of the hob plate or in the same plane as a frame part described above on the top of the hob plate. The surface could also be sloping or rounded.

Since such a cover is advantageously attached to the receiving trough or to the channel, it is rigid and fixed, so that the aforementioned lateral distance of an outer edge of the hob plate or a frame part arranged on it is advantageously a few millimeters then even to the cover or to whose inner edge exists. In this way, it can again be achieved that an inner edge of the cover is evenly spaced from the outer edge of the hob plate or a frame part arranged on it, so that the cover does not interfere with the free mobility of the hob plate and thus cannot falsify a weight measurement. Such a lateral distance can be 0.1 mm to 10 mm, advantageously 1 mm to 3 mm. It can form a narrow slot that surrounds the hob plate.

With an outer area, the cover can rest on the edge of the tub or be connected to it. Such a tub edge is advantageously angled outward in such a way that it can lie flat on an upper side of a worktop, and the cover then just lies on this resting area. This means that only the cover can be visible from above and not the edge of the tub. This creates a visually reduced, appealing and easy-to-clean arrangement. The channel becomes accessible by removing the cover and can be cleaned if necessary. For this purpose, the cover can advantageously be detached from the hob or from the channel without tools. For this purpose, cover supports can protrude downward from an underside of the cover, for example, which engage in support receptacles in the channel or on a floor of the channel. Finally, the gutter is located below the cover. A support for the cover should be designed to be relatively stable, since it is entirely possible that greater weight forces act on the cover by placing a heavy cooking vessel on it or by supporting it with one hand. Cover supports protruding from the underside of the cover can engage in support receptacles in the channel or on a floor of the channel. A lock can be made, for example magnetically, but is not considered to be mandatory, since the cover will hardly come off by itself when the hob is used.

It is advantageously provided for a cover that its upper side runs in one plane with an upper side of the hob plate or with an upper side of the frame part, advantageously along an aforementioned outer edge of the hob plate. Then, in the area of the lateral distance that forms a slot for liquid to flow off on the hob plate, there is only a lateral distance and no height offset. Furthermore, it can be provided that a frame part extends laterally below the cover, but with at least a small distance and, above all, without direct contact. As a result, an aforementioned slot can be retained, only with an angled course, and at the same time the slot can be covered, so to speak.

In an embodiment of the invention, the receiving trough can have a support section protruding laterally outward on the rim of the tub. This runs parallel to the hob plate and thus advantageously also parallel to a worktop in which the hob is to be arranged. This support section can be a few millimeters wide, for example 3 mm to 20 mm. It can be designed to rest on such a worktop, as has been described above. The aforementioned cover can rest on this support section over the channel, as has been described above, advantageously completely covering it. In addition to fastening a hob with the receptacle in a previously described cutout in the worktop by resting the above-described support sections on the top of the worktop, it can also be provided that the hob is held in the worktop by means of lateral screwing or corresponding fastenings on an inner edge of the cutout. Then there is not necessarily a protrusion over the rest of the surface of the worktop. A recess on the top running around the cutout may also provide that the hob with the support section of the receiving pan, possibly even with the cover over the channel, is arranged flush with the surface in the worktop. For this purpose, however, one can essentially fall back on technical possibilities as they are generally known for the arrangement of hobs in cutouts in a worktop. Possibly it can also be provided that only a raised tub edge is fastened within an inner edge of the cutout in the worktop and does not extend over the top of the worktop at all. It can then be provided that only the above-described cover rests over the channel on an upper side of the worktop around the cutout.

In a further general embodiment of the invention, it may be possible that the channel not only serves to collect liquid in order to prevent it from getting into the receiving tub and possibly to functional units of the hob, in particular to electrical functional units. For example, it can also be illuminated and thus cause a luminous phenomenon that can be recognized through the slot between the cover or cover plate and the frame part or hob plate. This luminous phenomenon can also be used functionally as a luminous display in order to show different operating states of the hob or individual heating devices, for example also by means of different colors. By means of directed and upwardly radiating light sources, an assignment to the individual heating devices or hotplates of the hob can even be achieved, whereby hot displays, active displays or problem states can possibly also be displayed.

In yet another embodiment of the invention, the channel can also be designed for sucking off steam that arises when cooking on the hob. For this purpose, the channel should be connected to one or more suction lines of a suction fan, as is generally known from so-called downdrafts as fume cupboards integrated into cooktops or integrated into worktops. Such a downdraft can be provided centrally in the middle of the hob plate, alternatively also in the form of strips and extend largely across the hob plate in one direction or run along a rear side.

If the hob has such a downdraft as described above, then these usually have their own collecting basin, since they also have an opening at the top. The gutter can be led to this collecting basin, possibly with an aforementioned drainage line.

The receiving trough can also have an opening or recess in a central area, on the one hand to save material and on the other hand to allow more cooling air to reach the hob. This is especially important if it is a hob with induction heating devices, the power control of which generates a lot of heat during operation.

Brief description of the drawings

Fig. 1

eine schräge Draufsicht auf eine erfindungsgemäße Anordnung eines erfindungsgemäßen Kochfelds in einer Arbeitsplatte mit umlaufender Abdeckung,

Fig. 2

die Anordnung aus Fig. 1 ohne die umlaufende Abdeckung und

Fig. 3

eine vergrößerte Schnittdarstellung durch die Anordnung aus Fig. 1.

Embodiments of the invention are shown schematically in the drawings and are explained in more detail below. In the drawings show:

Fig. 1

an oblique top view of an inventive arrangement of a hob according to the invention in a worktop with a circumferential cover,

Fig. 2

the arrangement Fig. 1 without the surrounding cover and

Fig. 3

an enlarged sectional view through the arrangement Fig. 1 .

Detailed description of the exemplary embodiments

In the Fig. 1 an arrangement 11 according to the invention is shown in an oblique top view with a hob 20 according to the invention in a worktop 13 Fig. 2 and above all the sectional view of the Fig. 3 show, the worktop 13 with an upper side 14 has a usual, rectangular cutout 16 with an inner edge 18. This cutout 16 is a few cm larger than the inserted hob 20 or a receiving tray 37, which will be explained in more detail below.

The hob 20 has a hob plate 21 which has an upper side 22 and an outer edge 21 '. A frame part 24 made of thin stainless steel sheet is placed and glued onto this hob plate 21 or the upper side 22 on the outer edge 21 '. This frame part 24 has an upper support edge 25 which rests flat on the outer edge 21 'or its upper side 22 and runs parallel to the upper side. The frame part 24 is angled downwards at right angles and runs approximately vertically downwards, a drip edge 26 being formed on the lower edge.

An operating device 28 is arranged below the hob plate 21 in a manner which is conventional per se, here as a touch switch device or so-called touch control with touch switches and illuminated displays. Furthermore, in Fig. 1 Heating devices 29 shown dotted, for example five pieces with a distribution as usual for such wide hobs 20. The heating devices 29 can be of any type, in particular radiant heating devices or induction heating devices.

At the bottom of the hob plate 21 is an inner housing 31 made of large flat parts, in particular sheet metal parts. It can be attached to the bottom of the hob plate 21 in a known manner. The aforementioned functional units such as operating device 28 and heating devices 29 are arranged in this inner housing 31, which will not be discussed in greater detail. Power electronics or power control are also included for a hob 20 with induction heating devices. The structural unit 32 explained at the beginning is thus formed, which essentially has the hob plate 21, inner housing 31 and operating device 28 and heating devices 29 arranged therein. This structural unit 32 is a so-called integrated and functionally closed structural unit. It can be at least partially sealed, in particular at the edge. Connections to the outside are essentially only a connection cable 35 for an electrical power supply.

The structural unit 32 is mounted by means of supports 34 in an aforementioned receiving trough 37 or on a floor of the receiving trough 37. These supports 34 are not explained in more detail here; they can essentially be support projections distributed in the corner regions. For example, they can stand up from the bottom of the receiving trough 37 and contain weight sensors (not shown in more detail). Alternatively and advantageously, the weight sensors are provided on top of or in the inner housing 31 or the structural unit 32, which makes their attachment and electrical connection easier. Thus, these weight sensors can form the support points with which the structural unit 32 rests on the support projections of the supports 34. Any weight load on the top 22 of the hob 20 as well as their Changes can then be recognized by means of the weight sensors. The possibilities and advantages resulting therefrom are sufficiently described in the prior art mentioned at the beginning. The connection cable 35 is advantageously mounted so flexibly or easily movable, in particular guided from outside the receiving trough 37 through a corresponding opening to the structural unit 32, that there is no falsification of a weight measurement. A calibration can possibly be carried out here after the installation of the hob 20 or the completion of the arrangement 11.

In an advantageous embodiment, the receiving trough 37 can be recessed in a large area below the structural unit 32 with an aforementioned opening. The components within the structural unit 32 generally generate larger amounts of heat that have to be dissipated via active or passive cooling. Where there are no supports 34 of the structural unit 32 on the receptacle 37 and no stiffening effect is necessary, the receptacle 37 can also be left open.

The receiving tray 37 has, like the Fig. 2 and above all the sectional view of the Fig. 3 show well, an outer raised tub rim 38. This tub rim 38 is angled on the outside with a support section 39 which runs parallel to the top side 22 of the hob 20. This support section 39 rests on the upper side 14 of the worktop 13 around the cutout 16 and can be glued or alternatively screwed. Such a screw connection can also take place on the side of the tub rim 38 with the inner rim 18. The support section 39 can possibly also lie in a milled recess on the upper side 14 of the worktop 13, so that installation flush with the surface is possible.

The receptacle 37 is functionally counted as part of the hob 20, even if, in the best case, it is not permanently connected to it, except possibly via the connection cable 35 including the feed. The support of the hob 20 by means of the supports 34 on the bottom of the receptacle 37 can be detachable or detachable, but does not have to and is also not advantageous in order to prevent misalignment of the weight measurement due to unintentional user handling. The support by means of the supports 34 is advantageously also designed in such a way that the hob 20 cannot be displaced in the horizontal direction. The receiving trough 37 is advantageously made of metal, for example at least one trough bottom within the supports 34. However, it can also be made of plastic.

A channel 40 is provided inside and in the upper area on the tub rim 38, advantageously made of a water-resistant material such as plastic or metal or stainless steel. The channel 40 has a channel bottom 41 and a raised outer edge 42 and an angled raised inner edge 43. With the outer edge 42, the channel 40 is advantageously firmly and permanently connected to the receiving trough 37 or its trough rim 38. A possible screw connection of the hob 20 to the worktop 13 can also go through here.

The inner edge 43 extends with an edge 43 'behind the frame part 24 or its drip edge 26 and clearly protrudes above this. The channel 40 is completely circumferential and tight, so that the inner edge 43 with the edge 43 ′ also runs completely inside and above the drip edge 26. Thus, liquid on the upper side 22 of the hob 20 or the hob plate 21 can run off to the outside via the frame part 24, the drip edge 26 ensuring that all the liquid runs into the channel 40 and cannot get inside the inner edge 43. There it could otherwise reach functionally important parts and, above all, electrical functional units of the hob 20. This can only happen if the channel 40 overflows, but this is very unlikely. Not shown in the Fig. 3 is a possible outflow from the channel 40 downwards, which can be permanently installed, so to speak. For this purpose, for example, an aforementioned drainage line can branch off from a lowest point of the channel 40, to which there is at least a slight gradient, and into a drainage pipe or the like. open below the worktop 13. It is also possible that a channel opens into a container whose capacity still exceeds that of the channel. Such a container can, for example, sit in a central opening of the hob plate 21, as is known from the aforementioned downdraft hobs.

From the Fig. 3 it can be seen that the structural unit 32, which contains the functional units necessary for cooking, is mechanically decoupled from the channel 40, which, so to speak, takes on the sealing function. Since the distance of the frame part 24 in the lateral direction to the tub edge 38 or to the support section 39 is too large to remain open, also because this would not be visually appealing, although a certain distance is important for the mechanical decoupling, a cover 45 described above is required intended. This is how that Fig. 1 shows, continuously circumferential as a kind of rectangular frame, whereby it is advantageously made of metal such as stainless steel or aluminum. In the outer area, it rests with a cover plate 46 on the support section 39 of the receiving trough 37, specifically flush with an outer edge 46 'of the cover plate 46 on the outside, or even overlaps the support section 39. An inner edge 46 ″ is at a distance of a few millimeters, for example 1 mm to 3 mm, from the frame part 24, thereby forming a slot 50. The previously described liquid can then run down through this slot 50 into the channel 40, a drain is so still possible. Such a slot 50 can even be visually appealing. It can also be used for the above-described options for lighting or a fume cupboard.

The cover 45 is fastened here by means of cover supports 48 at the bottom of the cover plate 46, possibly with additional reinforcement plates or reinforcement ribs. The cover supports 48 are mounted at the bottom in support receptacles 44 on the channel bottom 41, advantageously by simply plugging them in. It is possible that holding magnets, latching or clamping mechanisms can also be used. Thus, the cover 45 can be removed upwards in order to clean the channel 40 and / or to remove liquid therefrom, if it should be present there.

Because the cover plate 46 rests on the support section 39 of the receiving trough 37, the support receptacles 44 would not necessarily be necessary. The cover plate 46 is held down anyway by its weight. Instead of the support receptacles 44, only bolts or angle pieces could be attached inside the channel 40 or at the bottom of the cover plate, which position the cover plate 46 against its outer edge 42. These positioning measures ensure that the slot 50 has a sufficient size all around so that a distance is ensured so as not to falsify the weight measurement.

The slot 50 can also be even smaller than indicated, but contact between the cover 45 and the frame part 24 must be avoided by at least a small distance, since this would result in an impairment of a weight measurement. The frame part 24 may also be angled in a stepped manner and thus engage under the cover 45 or its cover plate 46 at the inner edge 46 ″, so that although there would be an angled path for liquid to drain into the channel 40, there would be no continuous upwardly open slot or at least would be visible. This is indicated by the dotted course. The production of such a frame part 24 is somewhat more complex, but at the same time an improved visual impression can be achieved.

Claims (15)

1. Cooking hob (20) having

   - a cooking hob plate (21),

   - heating devices (29) arranged underneath the cooking hob plate (21),

   - a receptacle trough (37) underneath the cooking hob plate (21),

   - a construction unit (32) including the cooking hob plate (21) and the heating devices (29),
   wherein

   - the construction unit (32) is mounted in the receptacle trough (37) by means of supports (34), with weight sensors being provided on the supports for measuring a weight load on the supports (34),

   - the receptacle trough (37) has an outer circumferential elevated trough edge (38),

   - the cooking hob plate (21) has a circumferential outer edge (21'),

   - the outer edge (21') of the cooking hob plate (21) is laterally spaced from the trough edge (38) on all sides of the cooking hob plate,

   - an inner housing (31) is provided underneath the cooking hob plate (21) and fixedly connected to the cooking hob plate (21) as part of the construction unit (32), wherein the heating devices (29) are disposed in the inner housing and/or are enclosed by the inner housing (31),
   characterized in that

   - the receptacle trough (37), within the trough edge (38) thereof, has a circumferential groove (40) directly adjacent thereto, which groove extends below the plane of the cooking hob plate (21),

   - the groove (40) reaches up to below the outer edge (21') of the cooking hob plate (21) or a circumferential frame part (24) provided on the outer edge (21') of the cooking hob plate,

   - the groove (40) extends partially outside the cooking hob plate (21) and outside the inner housing (31) and engages under the cooking hob plate.
2. Cooking hob according to claim 1, characterized in that the inner housing is disposed completely within the receptacle trough (37) underneath the trough edge (38).
3. Cooking hob according to claim 1 or 2, characterized by an operating device (28), wherein the operating device is part of the construction unit (32) of cooking hob plate (21) and heating devices (29), wherein in particular the operating device (28) is disposed within the receptacle trough (37).
4. Cooking hob according to any of the preceding claims, characterized in that supporting projections protrude from the inner housing (31), in particular downwards, which supporting projections are placed onto the supports (34) or the weight sensors in the receptacle trough (37).
5. Cooking hob according to any of the preceding claims, characterized in that the groove (40) is a separately manufactured part which is fixed to the receptacle trough (37).
6. Cooking hob according to any of the preceding claims, characterized in that a discharge line goes off downwards from the groove (40), wherein in particular the discharge line is a flexible hose, wherein preferably the groove (40) has a sloping with a deepest point on the discharge line.
7. Cooking hob according to any of the preceding claims, characterized in that, on the outer edge (21') of the cooking hob plate (21), a circumferential frame part (24) is provided, preferably made of metal, wherein the frame part is drawn downwards with a drip edge (26) and reaches under the plane of the underside of the cooking hob plate (21), wherein preferably the groove (40) has an upwards drawn inner edge (43), which extends within the frame part (24) or the drip edge (26) and has an upper inner rim (43') which extends across the drip edge (26).
8. Cooking hob according to claim 7, characterized in that the frame part (24) is angled at least once and extends with a support portion (39) in parallel to the cooking hob plate (21) and thereby is placed and fixed along the outer edge (21') of the cooking hob plate (21) on the upper side (22) thereof, preferably is adhesively bonded to the upper side (22) of the cooking hob plate (21).
9. Cooking hob according to claim 7, characterized in that the frame part is angled at least once and extends with a support portion in parallel to the cooking hob plate and thereby is placed and fixed along the outer edge of the cooking hob plate on the underside thereof, preferably is adhesively bonded to the underside of the cooking hob plate.
10. Cooking hob according to any of the preceding claims, characterized in that the groove (40) is covered or closed towards the top at least partially by a cover (45), wherein in particular the cover (45) is continuously circumferential and has a cover surface (46) on the upper side, which cover surface is parallel to the cooking hob plate (21), wherein preferably the cover (45) is removable from the cooking hob (20), wherein in particular from an underside of the cover (45) cover struts (48) project downwards, which struts engage in strut receptacles (44) in the groove (40) or on a bottom (41) of the groove.
11. Cooking hob according to claim 10, characterized in that the cover (45) with an outer region rests on the trough edge (38) or is connected thereto, and has a circumferential inner edge (43) which has a lateral distance of 0.1 mm to 10 mm, preferably 1 mm to 3 mm, to the outer edge (21') of the cooking hob plate (21) or a frame part (24) disposed thereon according to any of claims 7 to 9.
12. Cooking hob according to claim 10 or 11, characterized in that an upper side of the cover (45) extends in a plane with an upper side (22) of the cooking hob plate (21) or with an upper side (25) of the frame part (24) along the outer edge (21') of the cooking hob plate (21) according to any of claims 7 to 9.
13. Cooking hob according to any of the preceding claims, characterized in that the receptacle trough (37) has on the trough edge (38) a laterally outwards protruding support portion (39) which extends in parallel to the cooking hob plate (21) and is configured for placing onto a countertop (13), wherein in particular the cover (45) according to any of claims 10 to 12 rests on the support portion (39) and preferably covers the support portion completely.
14. Arrangement (11) of a cooking hob (20) according to any of the preceding claims in a countertop (13), wherein the countertop has a cut-out (16) sized corresponding to the receptacle trough (37) in such a manner that the cooking hob (20) with the receptacle trough (37) is inserted into the cut-out (16).
15. Arrangement according to claim 14, characterized in that the cooking hob housing with the support portion (39) according to claim 13 rests on an upper side (22) of the countertop (21) around the cut-out (16), or in that the cover (45) according to any of claims 10 to 12 rests on an upper side (22) of the countertop (21) around the cut-out (16).

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