COOKTOP SYSTEM

Description

[0001] The invention relates to a hob system with an extractor hood.

[0002] WO 2012 / 146237 A1 discloses a cooktop system with an extractor and multiple cooktops. The extractor comprises a fan unit and an intake duct that extends upwards, at least in sections, into an area below the fan impeller to draw cooking fumes into the fan unit. A fan motor of the fan unit is suspended from an electronics housing. A disadvantage is that vibrations from the fan unit are transmitted to the electronics housing. This leads to increased stress on the electronics and noise emissions.

[0003] A cooktop system with an extractor hood and multiple cooktops is also known from DE 20 2013 005 303 U1. Cooktop systems are also known from DE 20 2019 106 084 U1 and DE 10 2016 123 418 A1.

[0004] It is an object of the invention to improve a hob system for insertion into a kitchen worktop with an extractor device for extracting cooking fumes downwards.

[0005] This object is achieved by a hob system having the features of claim 1.

[0006] According to the invention, a cooktop system with an extractor device for extracting cooking fumes downwards, having at least one fan unit for sucking in the cooking fumes, has an intake duct which extends at least partially into an area below the fan wheel for sucking the cooking fumes upwards into the at least one fan unit, thus ensuring particularly safe operation of the cooktop system. The cooktop system can be operated in a particularly robust and quiet manner because a fan motor of the fan unit is attached to a support structure arranged below a fan wheel of the fan unit. By attaching the fan motor to the support structure arranged below the fan wheel, the fan motor can be decoupled from components arranged above the fan motor, in particular from a cooktop housing, in particular a housing for the cooktop heating or control.The transmission of mechanically stressful vibrations from the fan motor to electronic components located above the fan motor can be reduced. Noise excitation caused by a vibrating housing located above the fan motor and typically facing the user can thus be avoided. By designing the intake duct so that cooking fumes are drawn upwards into the fan unit, the fan motor is reliably protected from overflow liquids, making the extractor unit particularly robust in operation.

[0007] A cooktop system for insertion into a kitchen worktop comprises at least one extractor device for extracting cooking fumes downwards, with at least one cooking fume inlet opening for sucking in the cooking fumes downwards, at least one fan unit for sucking in the cooking fumes, which fan unit has a fan wheel and a fan motor for rotating the fan wheel, and an intake duct for fluidly connecting the at least one cooking fume inlet opening to the at least one fan unit, which intake duct is arranged at least partially below the fan wheel, and at least one cooktop, with a cooktop plate for supporting cooking items, and at least one cooking zone for heating the cooking items arranged on the cooktop plate, and a fastening of the fan motor to a support structure arranged below the fan wheel.

[0008] In particular, the support structure can be arranged entirely beneath the fan wheel. It can also overlap the fan wheel vertically.

[0009] According to one aspect of the invention, the fan motor and the fan wheel, in particular the entire fan unit, are attached to the support structure arranged below the fan wheel. This also prevents the transmission of vibrations caused by the rotation of the fan wheel to components arranged above the fan motor.

[0010] Preferably, the fan motor, in particular the at least one fan unit, is fastened exclusively to the support structure arranged below the fan wheel. For this purpose, the fan motor can rest on the support structure from above. The fan motor can in particular be placed on the support structure. The fan motor can be fastened to the support structure in a form-fitting and / or force-fitting manner, in particular by means of a bolt connection, in particular a screw connection or a rivet connection. The fastening of the fan motor to the support structure is preferably designed such that the weight of the fan motor is transmitted predominantly, i.e. to a proportion of more than 50%, in particular completely, to the support structure in the form of compressive forces.

[0011] The connection between the fan motor and the supporting structure is therefore particularly robust and economical to manufacture.

[0012] The fan motor can in particular be arranged at least partially, in particular completely, above the supporting structure.

[0013] Alternatively, the fan motor can also be arranged at least partially, in particular completely, below the supporting structure.

[0014] The support structure can extend beyond the fan motor, particularly in plan view. It can allow load transfer into a piece of kitchen furniture, in particular a base cabinet, a wall, or a kitchen worktop.

[0015] According to one aspect of the invention, the intake duct is designed such that at least a portion of the cooking vapors are sucked upwards into the fan unit. The proportion of cooking vapors sucked upwards is preferably at least 25%, in particular at least 50%, in particular at least 70%, in particular 100%. The remaining portion of the cooking vapors sucked into the fan unit can, for example, be sucked downwards into it. Due to the at least partial upward suction of the cooking vapors, a volume of the intake duct arranged below the fan unit is available to absorb overflow liquid.The fan motor is thus particularly reliably protected against overflow liquids that could penetrate the intake duct through at least one cooking fume inlet. If they come into contact with the live components of the fan motor, they could endanger the user and damage the extractor. By at least partially drawing in cooking fumes upwards, the extractor is particularly safe and robust in operation.

[0016] Another idea, not according to the invention, relates to an extractor device with at least one cooking fume inlet and at least one fan unit, which comprises a fan motor and a fan wheel reversibly and detachably connected to the fan motor. Preferably, the previously described extractor device is further developed with the features of this extractor device and vice versa. A detachable fan coupling can be provided between the fan wheel and the fan motor. This advantageously ensures that the fan wheel can be removed from the extractor device for cleaning purposes. For details on the design of the fan coupling, reference is made to WO 2019 / 068421 A1.

[0017] Preferably, the fan wheel can be removed from the extractor through an intake duct and the cooking fume inlet. The intake duct can be designed such that the fan wheel must be tilted about a horizontal axis to be removed from the extractor.

[0018] Preferably, to facilitate removal of the fan wheel, in particular to enable removal in the first place, part of a fan housing of the fan unit can be removed from the extractor extraction device, in particular through the cooking fume inlet opening. The fan housing can have a protective grille and / or at least one air guiding element and / or a filter seat for a filter, in particular a grease filter, in the region of a housing inlet opening and / or a housing outlet opening. The protective grille and / or the at least one air guiding element and / or the filter are preferably removable from the fan housing, in particular to remove the fan wheel from the fan housing. This further improves the cleanability of the extractor extraction device.

[0019] The fan wheel can also be removed from the extractor device through a reversibly closable removal opening in the intake duct and / or an overpressure duct. For reversibly closing the removal opening, the intake duct and / or the overpressure duct can have a removal cover. The removal opening can be designed to allow downward removal of the fan wheel. Preferably, the removal opening is arranged at a bottom of the intake duct and / or the overpressure duct. Preferably, the removal opening is also designed to allow removal of a filter, in particular an odor filter, in particular an activated carbon filter, which is provided in particular in the overpressure duct.

[0020] According to a further aspect of the invention, the cooking vapor inlet opening has a round cross-section, in particular elliptical, in particular circular, or polygonal, in particular rectangular. The aspect ratio of the cross-section is preferably at least 1.5, in particular at least 2, in particular at least 3.

[0021] According to a further aspect of the invention, the fan motor can be reversibly removed from the extractor device through the cooking fume inlet and / or the removal opening for the fan wheel and / or through a base of the intake duct and / or the overpressure duct. Such removal of the fan motor is particularly easy due to the fan motor's attachment to the support structure arranged below the fan wheel. This enables the fan motor to be removed economically for maintenance purposes and / or for replacement with a replacement motor. For this purpose, the fan motor's attachment can be designed to be reversibly detachable.

[0022] To draw the cooking fumes upward into the fan unit, the intake duct extends at least partially below the fan impeller. Preferably, the fan impeller overlaps and / or covers the intake duct at least partially in a top view.

[0023] The at least one fan unit is preferably designed as a radial fan. The at least one fan unit can also be designed as an axial fan and / or as a cross-flow fan.

[0024] According to a further aspect of the invention, the support structure is formed by the intake duct and / or is connected to the intake duct in one piece, in particular by a material bond. Because the support structure is formed by the intake duct, the structure of the intake duct can be used particularly efficiently. The extractor extraction device can thus be implemented in a particularly space-saving manner and manufactured economically.

[0025] The support structure can also be formed as part of a housing of the cooktop system or connected to it. In this case, it is preferably provided that the support structure is decoupled from other areas of the housing by decoupling means, in particular vibration-damping means.

[0026] The supporting structure can also be formed by a separate element from the cooktop system. It can be arranged, for example, on a kitchen cabinet, a wall, or a kitchen worktop, and in particular can be connected in a force-transmitting manner.

[0027] The supporting structure can be designed as a stiffening element or can comprise one or more stiffening elements, in particular profile strips.

[0028] According to a further aspect of the invention, a liquid barrier is arranged between the cooking vapor inlet opening and the fan motor, in particular upstream of the fan impeller. The liquid barrier can be arranged in the intake duct. The liquid barrier delimits, at least in sections, a liquid reservoir for receiving overflow liquid. Preferably, the liquid reservoir is formed by a liquid tray that can be reversibly removed from the extractor device. The liquid tray is preferably removable through the cooking vapor inlet opening and / or the removal opening for the fan impeller, which is arranged in particular at a bottom of the intake duct and / or the overpressure duct. The liquid barrier prevents overflow liquid penetrating the extractor device through the cooking vapor inlet opening from advancing towards the fan unit, in particular the fan motor.The liquid reservoir preferably has a capacity of at least 100 ml, in particular at least 250 ml, in particular at least 500 ml.

[0029] According to a further aspect of the invention, the liquid barrier completely encloses a fan axis of the fan wheel in the circumferential direction, i.e., by 360°. The liquid barrier can circumferentially enclose a drive shaft, which connects the fan wheel to the fan motor in a torque-transmitting manner. This advantageously ensures that the fan motor is reliably protected from overflow liquids, even when cooking vapors flow around the rotational axis.

[0030] An upper edge of the liquid barrier, which determines the capacity of the liquid reservoir, is also referred to as an overflow collar. According to one aspect of the invention, a height h of the liquid reservoir, in particular a vertical distance of the overflow collar from a bottom side of the intake channel, is at least 5 mm, in particular at least 10 mm, in particular at least 20 mm, in particular at least 40 mm.

[0031] According to a further aspect of the invention, the extractor device comprises at least one sensor for detecting a liquid level in the liquid reservoir. The sensor can be designed as a capacitive sensor and / or a conductivity sensor and / or an optical sensor. The sensor is preferably connected to a control device. The control device is preferably designed to provide a signal when a limit level of the liquid in the liquid reservoir is reached, which signal causes the extractor device, in particular the fan motor, to be switched off and / or an acoustic and / or visual warning signal to be emitted.

[0032] According to a further aspect of the invention, the liquid barrier has at least one, in particular at least two, flow guide elements. The flow guide element can be designed as a guide plate and / or as a guide profile. Preferably, a main extension plane of the at least one flow guide element is oriented parallel to the axis of rotation. The flow guide element can be designed as a flow divider for efficiently dividing the cooking vapor flow, in particular for flowing around the fan axis and / or the drive shaft on both sides. Loss-inducing vortex formation when flowing around the liquid barrier can thus be avoided.

[0033] According to a further aspect of the invention, the support structure comprises at least one flow guide element according to the above description.

[0034] According to a further aspect of the invention, the liquid barrier is concavely curved, at least in some areas, to reduce resistance. According to one aspect of the invention, the fan wheel overlaps the liquid barrier in a plan view. The concave curvature of the liquid barrier can be designed to redirect the cooking vapor flow upwards toward the fan wheel. The redirection of the cooking vapor flow toward the fan wheel can thus be particularly flow-efficient.

[0035] According to a further aspect of the invention, the liquid barrier is a component of the support structure, with the fan motor being attached to the liquid barrier. The liquid barrier structure can thus be used in addition to the mechanical attachment of the fan motor. The extractor hood can thus be implemented in a particularly space-saving and economical manner.

[0036] According to a further aspect of the invention, the intake duct extends downwards beyond the fan wheel by at least 20 mm, in particular at least 30 mm, in particular at least 40 mm, in particular at least 60 mm. This allows for a particularly large flow cross-section for the intake of cooking vapors, making the intake particularly flow-efficient. Furthermore, the capacity of a liquid reservoir can be dimensioned sufficiently large.

[0037] According to a further aspect of the invention, the fan motor extends downwards beyond the intake duct by at least 20 mm, in particular at least 30 mm, in particular at least 40 mm, in particular at least 60 mm. This enables a particularly space-saving design of the extractor device. Alternatively, the intake duct can extend downwards beyond the fan motor by at least 20 mm, in particular at least 30 mm, in particular at least 40 mm, in particular at least 60 mm. This improves protection against overflow liquids.

[0038] According to a further aspect of the invention, the fan axis of the fan wheel is oriented vertically. The vertical orientation of the fan axis, in combination with the intake in a vertical upward direction, ensures particularly reliable protection of the fan motor against overflow liquids. Furthermore, this allows the extractor device to be designed to be particularly space-saving. The vertical extension of the extractor device between the cooking fume inlet and the underside of the intake duct is preferably a maximum of 250 mm, in particular a maximum of 200 mm, in particular a maximum of 150 mm, in particular a maximum of 100 mm.

[0039] According to a further aspect of the invention, a fan axis of the fan wheel and / or the fan wheel and / or the fan motor are arranged at a distance from the cooking vapor inlet opening and / or a geometric center of gravity of a cooking plate in a plan view. The cooking vapor inlet opening is preferably formed as a recess in the cooking plate. In a plan view, the cooking plate preferably partially, in particular incompletely or completely, overlaps the fan motor and / or the fan wheel. This advantageously ensures that the fan motor and / or the fan wheel are particularly reliably protected from overflow liquids.

[0040] A distance between the geometric center of gravity of the cooking plate and the fan axis and / or the fan wheel and / or the fan motor is preferably at least 5 mm, in particular at least 10 mm, in particular at least 20 mm, in particular at least 40 mm, in the horizontal direction. A distance between the cooking vapor inlet opening and the fan axis and / or the fan wheel and / or the fan motor is preferably at least 5 mm, in particular at least 10 mm, in particular at least 20 mm, in particular at least 40 mm, in the horizontal direction.

[0041] Another object of the invention is to provide an improved extractor device which solves the problem of transmission of vibrations and emission of noise in an alternative manner.

[0042] This object is achieved by an extractor device for extracting cooking fumes downwards for a cooktop system for insertion into a kitchen worktop, comprising at least one cooking fume inlet opening, at least one fan unit for sucking in the cooking fumes, with a fan wheel and a fan motor for rotating the fan wheel, and a fan attachment for attaching the at least one fan unit to a cooktop and / or to a piece of kitchen furniture.It has been recognized that an extractor device with a fan unit and a fan attachment, which is designed to attach the fan unit to a cooktop and / or to a piece of kitchen furniture, can reduce the propagation of vibrations emanating from the fan unit in an area of sensitive components, in particular electronic components, and / or the emission of noise.The fan mount can be designed to attach the fan unit to a kitchen worktop and / or a kitchen base cabinet of the kitchen furniture. The kitchen base cabinet is also referred to as the body. The fan mount is preferably designed to attach the fan unit directly to the cooktop and / or directly to the kitchen worktop and / or to the kitchen base cabinet, in particular to at least one horizontal and / or vertical wall of the kitchen base cabinet. This means that the mount is not via a housing of the extractor hood and / or a cooktop, and that the fan mount is not a component of a corresponding housing. The fan mount can be a component independent of other components of the extractor hood and / or a cooktop, in particular of any housing.This advantageously avoids connecting the fan unit to structures that support sensitive components, particularly electronic components. The cooktop and / or kitchen furniture are typically very rigid, which means they are not prone to vibration and thus do not emit noise. The extractor hood is thus particularly robust and quiet in operation. The extractor hood is preferably further developed with at least one of the features of the previously described extractor hood.

[0043] According to one aspect of the invention, the fan mount comprises at least one damping element for vibration dampening. The damping element is preferably arranged between the fan unit and the cooktop panel and / or the kitchen furniture. The damping element can comprise a rubber-elastic material. The fan mount can be designed to be flexible in shape. The separate design of the fan mount from other components of the cooktop system, in particular the extractor hood, enables simple and economical integration of a corresponding damping element into the fan mount.

[0044] The fan mount can be a single-piece or multi-piece design. The fan mount preferably comprises at least one fan connection means for attaching to the fan unit and at least one panel connection means for connecting to the cooktop and / or the kitchen unit. The fan connection means and the panel connection means are preferably reversibly connectable to one another. This simplifies the installation of the extractor hood.

[0045] According to a further aspect of the invention, the fan attachment is designed to rest on the kitchen worktop from above and / or to be connected to the kitchen worktop from below. For connection to the kitchen worktop from below, the fan attachment, in particular the panel connection means, can be glued and / or screwed to the kitchen worktop. The adhesive can be designed to dampen vibrations and, for this purpose, comprise a rubber-elastic material. The fan attachment, in particular the panel connection means, can rest on the kitchen worktop from above without any further fastening or can additionally be glued or screwed to it. A layer of a rubber-elastic material can be provided between the kitchen worktop and the fan attachment for vibration dampening and / or for better load distribution.The fan unit can therefore be mounted particularly robustly and without transmitting vibrations to other components of the extractor hood or hob system.

[0046] According to a further aspect of the invention, the hob plate rests on the fan mount from above, in particular on the plate connection means. Preferably, the hob plate and the fan mount are designed such that a surface of the hob plate can be mounted flush with a surface of the kitchen worktop.

[0047] The fan mount preferably includes a positioning means for compensating for dimensional tolerances when attaching the fan unit to the kitchen unit and / or the hob. The positioning means can be designed in the form of at least one elongated hole and / or at least one guide slot.

[0048] Another object of the invention is to provide an improved hob system.

[0049] By designing the cooktop system with an extractor device according to the above description, it is particularly robust and quiet in operation. The extractor device can be further developed with one or more features of the extractor devices according to the above description. The cooktop system preferably comprises at least 1, in particular at least 2, in particular at least 3, in particular at least 4 cooking zones for heating food. The cooktop plate is preferably formed as a single piece, in particular in one piece, and in a plan view preferably extends over at least one, in particular at least two, in particular all of the cooking zones. The cooking vapor inlet opening is preferably arranged in a central region of the cooktop plate, in particular overlapping a geometric center of gravity of the cooktop plate in a plan view.The cooking fume inlet preferably penetrates the hob plate.

[0050] According to one aspect of the invention, the extractor device has at least 1, in particular at least 2, in particular at least 3, cooking fume inflow openings, which preferably penetrate the cooking surface plate.

[0051] According to a further aspect of the invention, the fan motor is arranged at a distance from the geometric center of gravity of the cooktop plate in a plan view. This advantageously ensures that the cooktop plate shields the fan motor from overflow liquids. The fan motor is thus particularly reliably protected against overflow liquids. The distance between the axis of rotation of the fan motor and the geometric center of gravity is preferably at least 40 mm, in particular at least 60 mm, in particular at least 80 mm, in particular at least 100 mm.

[0052] According to a further aspect of the invention, the cooktop system is designed as an assembly unit. This means that the at least one extractor hood and the at least one cooktop are connected to one another as a single piece in the delivery state. The cooktop system designed as an assembly unit can thus be installed as a single unit, for example, inserted into a kitchen worktop.

[0053] Further advantages, features, and details of the invention will become apparent from the following description of several exemplary embodiments with reference to the figures. They show: Fig. 1a perspective view of a hob system installed in a kitchen base unit with a hob and an extractor fan, Fig. 2a sectional view of the hob system in Fig. 1 , wherein the extractor device comprises a fan unit with a fan wheel and a fan motor mounted below the fan wheel, Fig. 3 a detailed view of the mounting of the fan motor in Fig. 2 , wherein the fan motor is fastened to an intake duct designed as a supporting structure, Fig. 4 is a sectional view of a hob system according to a further exemplary embodiment, wherein the hob system has an extractor device with a fan unit which is fastened to a hob plate, Fig. 5 is a sectional view of a hob system according to a further exemplary embodiment, wherein the hob system comprises an extractor device with a fan unit which is fastened to the underside of a kitchen worktop, and Fig. 6 is a sectional view of a hob system according to a further exemplary embodiment, wherein the hob system has an extractor device with a fan unit which is fastened to a kitchen worktop by means of a fan fastening, wherein the fan fastening rests on the kitchen worktop from above.

[0054] Based on the Fig. 1 bis Fig. 3 A first embodiment of a cooktop system 1 comprising a cooktop 2 and an extractor device 3 for extracting cooking fumes downwards is described. A common control device 4 is provided for controlling the cooktop 2 and the extractor device 3. The cooktop system 1 is installed by means of a mounting frame 5 into a corresponding recess in a kitchen worktop 6. The kitchen worktop 6 is placed on a kitchen base cabinet 7. The kitchen worktop 6 and the kitchen base cabinet 7 are components of a piece of kitchen furniture. The control device 4 comprises a user interface 8. The user interface 8 is designed in the form of a touch-sensitive screen.

[0055] The hob 2 comprises a hob plate 9. The hob plate 9 is designed as a glass-ceramic plate. The user interface 8 is arranged on the hob plate 9. The hob 2 has four cooking zones, which are designed as induction cooking zones 10.

[0056] The extractor device 3 comprises a cooking fume inlet opening 11, a fan unit 12 for extracting the cooking fumes through the cooking fume inlet opening 11 and an intake duct 13 connected to the fan unit 12 in a fluid-conducting manner for conducting the cooking fumes.

[0057] An inlet grille 14 is arranged at the cooking fume inlet opening 11. Furthermore, the extractor device 3 comprises a combination filter 15. The combination filter 15 is designed to filter grease and odors from the cooking fumes. In particular, the combination filter 15 comprises a grease filter and an odor filter. The intake duct 13 extends between the inlet grille 14 and the fan unit 12 and is also referred to as a vacuum duct. The combination filter 15 is arranged in the intake duct 13. A Fig. 2 The flow path 16 shown illustrates the air flow. Downstream of the fan unit 12, a pressure duct (not shown) is connected for conveying the cooking fumes. An odor filter, in particular an activated carbon filter, is preferably arranged in the pressure duct. The pressure duct can be configured to operate the extractor device 3 in recirculation mode to return the cooking fumes to the environment and / or to operate the extractor device 3 in exhaust mode to convey the cooking fumes, in particular through a building's exterior wall, into the environment.

[0058] The hob system 1 is designed as an assembly unit. For this purpose, the hob 2 and the extractor hood 3 are connected to each other, particularly in the delivery state, to form a combined appliance.

[0059] The cooking vapor inlet opening 11 overlaps a geometric center of gravity 17 of the cooktop plate 9 in a plan view. In particular, the cooking vapor inlet opening 11 is circular in plan view. The cooking vapor inlet opening 11 is arranged centrally on the cooktop plate 9, in particular concentrically to the geometric center of gravity 17.

[0060] The fan unit 12 comprises a fan wheel 18 and a fan motor 19 for rotating the fan wheel 18. The fan motor 19 is arranged at a distance from the geometric center of gravity 17 of the cooktop plate 9 in plan view. A distance a GM between the geometric center of gravity 17 and the fan motor 19 is 120 mm.

[0061] In plan view, the fan wheel 18 is arranged at a distance from the geometric centroid 17 of the cooktop plate and at a distance from the cooking vapor inlet opening 11. The distance a GR between the geometric centroid 17 and the fan wheel 18 is 80 mm. The distance a ER between the cooking vapor inlet opening 11 and the fan wheel 18 is 40 mm.

[0062] A fan axis 20 of the fan wheel 18 is oriented vertically. The fan axis 20 is arranged concentrically with the rotational axis of the fan motor 19. The fan axis 20 is arranged at a distance a GA of 160 mm from the geometric center of gravity 17 of the cooktop plate 9.

[0063] The fan motor 19 is connected to the fan wheel 18 via a drive shaft 21 in a torque-transmitting manner. The drive shaft 21 is arranged concentrically to the fan axis 20. To protect the fan motor 19 from overflow liquid, a liquid barrier 22 is arranged upstream of the fan motor 19, in particular between the cooking fume inlet opening 11 and the fan motor 19. The liquid barrier 22 completely surrounds the drive shaft 21 in the circumferential direction. The liquid barrier 22 is formed integrally with the intake duct 13. To protect the fan motor 19 from overflow liquid, the liquid barrier 22 projects upwards above a bottom side 23 of the intake duct 13. In particular, a height h of the liquid barrier 22, in particular of an overflow collar 24, relative to the bottom side 23 of the intake duct 13 is 40 mm.This reliably prevents the drive shaft 21 or the fan motor 19 from coming into contact with overflow liquid that has penetrated into the intake duct 13.

[0064] The intake duct 13 is designed such that the drawn-in cooking vapors are directed upwards toward the fan wheel 18. The intake duct 13 is thus designed such that the fan wheel 18 draws the cooking vapors vertically upwards. For this purpose, the intake duct 13 extends at least partially into an area below the fan wheel 18. The fan wheel 18 overlaps the intake duct 13 in a plan view. This advantageously ensures that the fan wheel 18 also does not come into contact with overflow liquid.

[0065] The fan motor 19 is attached to a support structure 25, which is arranged below the fan wheel 18. The support structure 25 is formed by the intake duct 13. For this purpose, the intake duct 13 has a surface reinforcement (not shown), in particular reinforcement ribs. The reinforcement ribs can be formed integrally with the intake duct 13. The reinforcement ribs are preferably arranged on an outer side of the intake duct 13 that is not wetted by the cooking vapor flow. The intake duct 13 is preferably manufactured, in particular in a single process step, using a primary forming process, for example, an injection molding process.

[0066] The liquid barrier 22 is concavely curved to reduce resistance and guide the flow. In particular, the liquid barrier 22 is arcuate, particularly circular.

[0067] The liquid barrier 22 has a flow guide element 26. The flow guide element 26 is designed to distribute the cooking vapor flow with reduced resistance. The flow guide element 26 thus ensures a particularly low-loss flow around the liquid barrier 22. In a front view, the flow guide element 26 is funnel-shaped, and in a plan view (not shown), the flow guide element 26 is elliptical, in particular with an aspect ratio of at least 5. Because the fan motor 19 is attached to the support structure 25 exclusively below the fan wheel 18, a disruptive influence of magnetic fields induced by the fan motor 19 on electronics arranged above the fan wheel 18 can be avoided. In particular, vibrations transmitted to an electronics housing 27 can be reduced.The fastening of the fan motor 19 to the support structure 25 at a distance from the electronics ensures damping of corresponding vibrations.

[0068] The electronics may be heating and / or control electronics for the cooktops 2. In particular, the heating electronics are designed to operate induction cooktops 10. The control electronics are part of the control device 4.

[0069] The hob system 1, the hob 2 and the extractor 3 function as follows:

[0070] The control device 4 is in energy-transmitting communication with the cooktop 2 and the extractor hood 3. Individual or multiple induction cooking zones 10 can be activated by user input via the user interface 8. Cooking items 29 placed on the respective induction cooking zones 10 are heated, generating cooking vapors. The extractor hood 3 is activated by the control device 4, with electrical power being supplied to the fan motor 19. The fan motor 19 causes the fan wheel 18 to rotate about the fan axis 20. The cooking vapors are drawn in from an area above the cooking items 29 along the flow path 16 through the cooking vapor inlet opening 11 into the intake duct 13. Grease and odors are filtered out of the cooking vapors in the combination filter 15.The cooking fumes are guided along the intake duct 13 and sucked vertically upwards to the fan wheel 18, in particular into a fan housing 30 of the fan unit 12.

[0071] Cooking vapors flow around the liquid barrier 22 in a horizontal plane on both sides of the fan axis 20. Because the liquid barrier 22 features the flow guide element 26, this flow can occur with particularly low resistance. The concave design of the liquid barrier 22 also promotes the efficient upward suction of the cooking vapors toward the fan impeller 18.

[0072] Because the fan wheel 18 and the fan motor 19 are arranged at a distance from the geometric center of gravity 17 of the cooktop plate 9 and at a distance from the cooking vapor inlet opening 11, they are shielded from the overflow liquid entering through the cooking vapor inlet opening 11. The upward suction of the cooking vapors protects, in particular, the fan wheel 18 from coming into contact with the overflow liquid. The penetration of the overflow liquid to the fan motor 19 and the drive shaft 21 is prevented by the liquid barrier 22. The cooktop system 1, in particular the extractor device 3, is thus particularly robust and safe to operate.

[0073] Based on the Fig. 4 A further exemplary embodiment of the cooktop system 1 is described. In contrast to the exemplary embodiment described above, the extractor device 3 comprises a fan attachment 31 for attaching the fan unit 12 to the cooktop plate 9. A further difference is that the intake duct 13 for fluidly connecting the cooking vapor inlet opening 11 to the fan unit 12 is designed such that the cooking vapors are sucked downward into the fan unit 12.

[0074] The fan mount 31 is designed in the form of an angle, in particular an angled sheet metal, in particular a metal sheet. The fan mount 31 is glued to the cooktop plate 9. The cooktop plate 9 is designed as a glass-ceramic plate. To protect the fan unit 12, in particular the fan motor 19, from overflow liquid, the extractor device has a liquid barrier 22 formed by the intake duct 13 and arranged upstream of the fan unit 12.

[0075] Because the fan unit 12 is attached to the cooktop plate 9 by means of the fan mount 31, the transmission of vibrations generated during operation of the fan motor 19 and the fan wheel 18 to the electronics for the cooktop control and / or heating can be reduced. By attaching the fan unit 12 to the typically particularly rigid cooktop plate 9, the excitation of vibrations in the cooktop system 1, in particular in the electronics housing 27, can be prevented. The cooktop system 1 is thus particularly quiet and robust during operation.

[0076] Preferably, the fan mount 31 includes at least one vibration damping element. The vibration damping element may, for example, comprise a rubber-elastic material.

[0077] The functionality of the Fig. 4 The hob system 1 shown corresponds to the functioning of the hob system 1 according to the embodiment described above.

[0078] Based on the Fig. 5 A further embodiment of the cooktop system 1 is described. In contrast to the embodiments described above, the intake duct 13 extending between the cooking vapor inlet opening 11 and the fan unit 12 is designed such that the cooking vapors flow into the fan unit 12 both upwards and downwards. For this purpose, the intake duct 13 has two intake duct sections 32, 33 which, in a plan view, overlap the fan wheel 18, wherein the first intake duct section 32 is arranged above the fan wheel 18 and the second intake duct section 33 is arranged below the fan wheel 18. The cooking vapors can thus be supplied to the fan wheel 18 in a particularly flow-efficient manner.

[0079] The fan motor 19 is attached to a fluid barrier 22, which is fastened to the support structure 25. In particular, the fan motor 19 is placed on the fluid barrier 22 and fastened to the support structure 25 by means of the fluid barrier. The support structure 25 is designed in the form of the intake duct 13. The intake duct 13 is attached to an underside 34 of the kitchen worktop 6 by means of the fan attachment 31. Thus, the fan unit 12, in particular the fan wheel 18 and the fan motor 19, are attached to the underside 34 by means of the fan attachment 31. This enables a particularly robust, rigid, and low-vibration attachment of the fan unit 12 during operation.

[0080] The fan wheel 18 is detachably connected to the fan motor 19. In particular, a reversibly detachable fan coupling 35 is provided between the fan wheel 18 and the fan motor 19.

[0081] The operation of the hob system 1 according to the Fig. 5 The embodiment shown corresponds to the functioning of the hob system 1 according to the embodiments described above.

[0082] Based on the Fig. 6 A further embodiment of a cooktop system 1 with a fan mount 31 is described. Unlike the previously described embodiments, the fan mount 31 is designed to rest on the kitchen worktop 6 from above. Because the fan mount 31 is designed to rest on the kitchen worktop 6 from above, the cooktop system 1 can be easily inserted from above into a corresponding recess in the kitchen worktop 6.

[0083] The hob plate 9 rests on the fan mount 31 from above. Preferably, the fan mount 31 is connected to the hob plate 9, in particular, glued to it. The installation of the hob system 1 on the kitchen worktop 6 is particularly simple due to the connection of the fan mount 31 to the hob plate 9. Alternatively, there is no connection, in particular no direct connection, between the fan mount 31 and the hob plate 9.

[0084] The operation of the hob system 1 according to the Fig. 6 The embodiment shown corresponds to the functioning of the hob system 1 according to the embodiments described above.

[0085] Because the fan motor 19 is attached to a support structure 25 located below the fan wheel 18, a particularly robust, low-vibration, and low-noise mounting during operation can be ensured. By designing the intake duct 13 such that the cooking vapors are sucked upward into the fan unit 12, the fan unit 12, in particular the fan motor 19, is particularly reliably protected from overflow liquids. Attaching the fan unit 12 to the cooktop 9 or kitchen worktop 6 using the fan mount 31 enables a rigid, robust, and low-vibration mounting of the fan unit 12.

Claims

1. Hob system (1) for being inserted into a kitchen worktop (6), comprising 1.

1. at least one vapour extraction device (3) for extracting cooking vapours downwards, with 1.1.

1. at least one cooking vapour inlet opening (11) for drawing in cooking vapours in a downward direction, 1.1.

2. at least one fan unit (12) for drawing in the cooking vapours, which has a fan wheel (18) and a fan motor (19) for driving the fan wheel (18) in rotation, and 1.1.

3. a suction duct (13) for fluid-conducting connection of the at least one cooking vapour inlet opening (11) to the at least one fan unit (12), which is arranged at least in sections below the fan wheel (18), and 1.

2. at least one hob (2), with 1.2.

1. a hob plate (9) for carrying cooking products (29), and 1.2.

2. at least one hot plate (10) for heating the cooking products (29) arranged on the hob plate (9), 1.

3. wherein the suction duct (13) is designed such that a portion of the cooking vapours is drawn upwardly into the fan unit (12) and the remaining portion of the cooking vapours drawn into the fan unit (12) is drawn downwardly into the fan unit (12). characterized by an attachment of the fan motor (19) to a supporting structure (25) below the fan wheel (18).

2. Hob system (1) according to claim 1, characterized in that the proportion of cooking vapours drawn upward is at least 25%.

3. Hob system (1) according to claims 1 or 2, characterized in that a liquid barrier (22) arranged between the at least one cooking vapour inlet opening (11) and the fan motor (19).

4. Hob system (1) according to claim 3, characterized in that the liquid barrier (22) prevents overflow liquid, which penetrates through the cooking vapour inlet opening (11) into the vapour extraction device (3), from advancing in the direction of the fan motor (19) of the fan unit (12).

5. Hob system (1) according to claims 3 or 4, characterized in that the liquid barrier (22) at least in sections bounds a liquid reservoir for receiving overflow liquid.

6. Hob system (1) according to claim 5, characterized in that wherein the liquid reservoir is formed by a liquid tray which can be reversibly removed from the vapour extraction device (3).

7. Hob system (1) according to claims 3 to 6, characterized in that the liquid barrier (22) is concavely curved at least in some regions to reduce the resistance of the flow.

8. Hob system (1) according to any one of the preceding claims, characterized by fastening the fan motor (19) to a supporting structure (25) in such a manner that the weight force of the fan motor (19) is transmitted predominantly, meaning to a proportion of more than 50 %, to the supporting structure (25) in the form of compressive forces.

9. Hob system (1) according to any one of the preceding claims, characterized in that a fan axis (20) of the fan wheel (18) is oriented vertically.

10. Hob system (1) according to any one of the preceding claims, characterized in that a fan axis (20) of the fan wheel (18) and / or the fan wheel (18) and / or the fan motor (19) are arranged at a distance from the at least one cooking vapour inlet opening (11) in a plan view.

11. Hob system (1) according to any one of the preceding claims, characterized in that the at least one fan unit (12) is designed in such a manner that cooking vapours are drawn upwardly into the at least one fan unit (12).

12. Hob system (1) according to any one of the preceding claims, characterized in that the fan motor (19) rests on the supporting structure (25) from above.

13. Hob system (1) according to any one of the preceding claims, characterized by being designed as an assembly unit.

14. Hob system (1) according to one of the preceding claims, characterized in that the at least one fan unit (12) is designed as a radial fan.

15. Hob system (1) according to one of the preceding claims, characterized in that the fan motor (19) is placed on top of the supporting structure (25) and in that the fan motor (19) is attached to the supporting structure (25) in such a way that the weight of the fan motor (19) is transferred entirely to the supporting structure (25) in the form of compressive forces.