EP3855077A2 - Vapour extraction device for removing cooking vapours downwards - Google Patents

Abstract

A fume extractor device (3) for extracting cooking vapors downwards comprises at least one cooking vapors inflow opening (11), at least one fan unit (12) for sucking in cooking vapors, with a fan wheel (18), and a fan motor (19) for rotating the fan wheel ( 18), and a suction channel (13) for fluid-conducting connection of the at least one cooking vapor inflow opening (11) with the at least one fan unit (12), which is at least partially in an upward direction to suck in cooking vapors into the at least one fan unit (12) extends below the fan wheel (18), the fan motor (19) being fastened to a support structure (25) arranged below the fan wheel (18).

Description

The content of the German patent application DE 10 2020 200 864.7 is incorporated herein by reference.

The invention relates to an extractor device for extracting cooking vapors downwards. The invention also relates to a cooktop system with an extractor device of this type.

From the WO 2012/146237 A1 a cooktop system with an extractor device and several cooktops is known. The fume extractor device comprises a fan unit and a suction channel which, in order to suck in the cooking vapors into the fan unit, extends in an upward direction, at least in sections, into an area below the fan wheel. A fan motor of the fan unit is suspended from an electronics housing. The disadvantage is that vibrations of the fan unit are transmitted to the electronics housing. This results in increased stress on the electronics and noise emissions.

A hob system with an extractor device and a plurality of hobs is also known from US Pat DE 20 2013 005 303 U1 .

It is an object of the invention to improve a hob system for insertion in a kitchen worktop with an extractor device for extracting cooking vapors downwards.

This object is achieved by a hob system with the features of claim 1. According to the invention, it was recognized that a hob system with an extractor device for extracting cooking vapors downwards with at least one fan unit for sucking in the cooking vapors and a suction channel which, in particular for sucking in the cooking vapors into the at least one fan unit, extends at least in sections into an area below the fan wheel and thus ensures particularly safe operation of the extractor device can be operated in a particularly robust and quiet manner if 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 hob housing, in particular a housing for the hob heating or control. A transmission of mechanically stressful vibrations from the fan motor to electronic components arranged above the fan motor can be reduced. A noise excitation by a vibrating housing arranged above the fan motor and usually facing the user can thus be avoided. By designing the suction channel in such a way that the cooking vapors are sucked into the fan unit in an upward direction, the fan motor is reliably protected from overflow liquids, which means that the extractor device is particularly robust in operation.

The support structure can in particular be arranged completely below the fan wheel. It can also overlap with the fan wheel in the vertical direction.

According to one aspect of the invention, the fan motor and the fan wheel, in particular the entire fan unit, are fastened to the support structure arranged below the fan wheel. Also a transmission of vibrations, for which the rotation of the fan wheel is the cause, on components arranged above the fan motor, can thus be avoided.

The fan motor, in particular the at least one fan unit, is preferably 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 attachment of the fan motor to the support structure is preferably designed in such a way that the weight of the fan motor is predominantly, i.e. in a proportion of more than 50%, in particular completely, transmitted to the support structure in the form of compressive forces.

The connection between the fan motor and the support structure can thus be produced in a particularly robust and economical manner.

The fan motor can in particular be arranged at least partially, in particular completely, above the support structure.

As an alternative to this, the fan motor can also be arranged at least partially, in particular completely, below the support structure.

The support structure can extend beyond the fan motor, in particular when viewed from above. It can enable load transfer in kitchen furniture, in particular a base cabinet, in a wall or in a kitchen worktop.

According to one aspect of the invention, the suction channel is designed in such a way that at least some of the cooking vapors are sucked into the fan unit in an upward direction. The proportion of cooking vapors sucked in 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 be sucked into the fan unit in a downward direction, for example. Due to the at least partial upward suction of the cooking vapors, a volume of the suction channel arranged below the fan unit is available for receiving overflow liquid. The fan motor is thus particularly reliably protected against overflow liquids which can penetrate into the intake duct via the at least one cooking vapor inflow opening and can endanger the user and damage the extractor device if they come into contact with the current-carrying components of the fan motor. As the cooking vapors are at least partially sucked upwards, the extractor device is particularly safe and robust in operation.

Another idea, in particular worth protecting independently of the above-described extractor device, relates to an extractor device with at least one cooking vapor inflow opening and at least one fan unit, which comprises a fan motor and a fan wheel reversibly detachably connected to the fan motor. The previously described extractor device is preferably developed further with the features of this extractor device and vice versa. A releasable fan clutch can be provided between the fan wheel and the fan motor. This advantageously means that the fan wheel can be removed from the extractor device for cleaning purposes can. With regard to the details of the design of the fan clutch, refer to the WO 2019/068421 A1 , the content of which is hereby fully incorporated into the present description. The fan wheel can preferably be removed from the extractor device through an intake duct and the cooking vapors inflow opening. The intake duct can be designed in such a way that the fan wheel has to be tilted about a horizontal axis in order to remove it from the extractor device.

For easier removal of the fan wheel, in particular to enable removal in the first place, a part of a fan housing of the fan unit can be removed from the extractor device, in particular through the cooking vapor inflow opening. The fan housing can have a protective grille and / or at least one air guide element and / or a filter seat for a filter, in particular a grease filter, in the area of a housing inflow opening and / or a housing outflow 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 in order to remove the fan wheel from the fan housing. This further improves the cleanability of the extractor device.

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 the reversible closure of the removal opening, the suction channel and / or the overpressure channel can have a removal cover. The removal opening can be designed to remove the fan wheel downwards. The removal opening is preferably arranged on a bottom of the suction channel and / or the overpressure channel. The removal opening is preferably also for removal a filter, in particular an odor filter, in particular an activated carbon filter, which is provided in particular in the overpressure channel.

According to a further aspect of the invention, the cooking vapor inflow opening is round in cross section, in particular elliptical, in particular circular, or polygonal, in particular rectangular. An aspect ratio of the cross section is preferably at least 1.5, in particular at least 2, in particular at least 3.

According to a further aspect of the invention, the fan motor can be reversibly removed from the fume extractor device through the cooking vapors inflow opening and / or the removal opening for the fan wheel and / or through a bottom of the intake duct and / or the overpressure duct. A corresponding removal of the fan motor is possible in a particularly simple manner by fastening the fan motor to the support structure arranged below the fan wheel. This enables the fan motor to be removed economically for maintenance purposes and / or to replace it with a replacement motor. For this purpose, the fastening of the fan motor can be designed to be reversibly detachable.

In order to suck in the cooking vapors upwards into the fan unit, the suction channel extends at least in sections below the fan wheel. The fan wheel preferably overlaps and / or covers the intake duct at least in sections in a plan view.

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.

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

The support structure can also be designed as part of a housing of the hob system or connected to it. In this case, provision is preferably made for the support structure to be decoupled from other areas of the housing by decoupling means, in particular vibration-damping means.

The support structure can also be formed by a separate element that is separate from the hob system. It can be arranged, for example, on a kitchen cabinet, a wall or a kitchen worktop, in particular connected in a force-transmitting manner.

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

According to a further aspect of the invention, a liquid barrier is arranged between the cooking vapor inflow opening and the fan motor, in particular upstream of the fan wheel. The liquid barrier can be arranged in the suction channel. The liquid barrier delimits, at least in sections, a liquid reservoir for receiving overflow liquid. Preferably, the liquid reservoir is through a Formed reversibly removable liquid tub from the extractor device. The liquid tub can preferably be removed through the cooking vapor inflow opening and / or the removal opening for the fan wheel, which is arranged in particular on a bottom of the suction channel and / or the overpressure channel. The liquid barrier prevents overflow liquid penetrating into the extractor device through the cooking vapor inflow opening from advancing in the direction of 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.

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

An upper edge of the liquid barrier, which is decisive for 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 an underside of the suction channel, is at least 5 mm, in particular at least 10 mm, in particular at least 20 mm, in particular at least 40 mm.

According to a further aspect of the invention, the extractor device comprises at least one sensor for detecting a liquid fill level in the liquid reservoir. The sensor can be designed as a capacitive sensor and / or as a conductivity sensor and / or as an optical sensor. The sensor is preferably in signal connection with 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 causes the extractor device, in particular the fan motor, to be switched off and / or an acoustic and / or optical warning signal to be output.

According to a further aspect of the invention, the liquid barrier has at least 1, in particular at least 2, flow guide elements. The flow guide element can be designed as a guide plate and / or as a guide profile. A main plane of extent of the at least one flow guide element is preferably oriented parallel to the axis of rotation. The flow guide element can be designed as a flow divider for the flow-efficient splitting of the cooking vapor flow, in particular for the flow around both sides of the fan axis and / or the drive shaft. A lossy vortex formation when flowing around the liquid barrier can thus be avoided.

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

According to a further aspect of the invention, the liquid barrier is designed to be concavely curved, at least in some areas, for flow guidance with reduced 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 used to redirect the flow of cooking vapors be formed in the direction of the fan wheel upwards. The deflection of the cooking vapor flow in the direction of the fan wheel can thus take place in a particularly flow-efficient manner.

According to a further aspect of the invention, the liquid barrier is part of the support structure, the fan motor being attached to the liquid barrier. The structure of the liquid barrier can thus also be used for mechanical fastening of the fan motor. The extractor device can thus be implemented in a particularly space-saving and economical manner.

According to a further aspect of the invention, the intake duct projects downward 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. As a result, a particularly large flow cross-section can be provided for sucking in the cooking vapors, whereby the suction is particularly flow-efficient. In addition, the capacity of a liquid reservoir can be dimensioned to be sufficiently large.

According to a further aspect of the invention, the fan motor projects downward 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. A particularly space-saving design of the extractor device is thus made possible. Alternatively, the intake duct can protrude downward 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 the protection against overflow liquids.

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 suction in the vertical direction upwards, ensures particularly reliable protection of the fan motor against overflow liquids. In addition, the extractor device can hereby be designed to be particularly space-saving. A vertical extension of the extractor device between the cooking vapor inflow opening and the underside of the suction channel 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.

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 in a plan view at a distance from the cooking vapor inflow opening and / or a geometric centroid of a hotplate. The cooking vapor inflow opening is preferably designed as a recess in the hotplate. In a top view, the hotplate preferably partially overlaps the fan motor and / or the fan wheel, in particular incompletely or completely. This advantageously means that the fan motor and / or the fan wheel are particularly reliably protected from overflow liquids.

A distance between the geometric centroid of the hotplate and the fan axis and / or the fan wheel and / or the fan motor in the horizontal direction is preferably at least 5 mm, in particular at least 10 mm, in particular at least 20 mm, in particular at least 40 mm. A distance between the cooking vapor inflow opening and the fan axis and / or the fan wheel and / or the fan motor is preferably at least in the horizontal direction 5 mm, in particular at least 10 mm, in particular at least 20 mm, in particular at least 40 mm.

Another object of the invention is to provide an improved range hood device which solves the problem of the transmission of vibrations and the emission of noise in an alternative manner.

This object is achieved by an extractor device with the features of claim 11. According to the invention, it was recognized that an extractor device with a fan unit and a fan attachment, which is designed to attach the fan unit to a hob plate and / or to kitchen furniture, reduces the spread of vibrations emanating from the fan unit in an area of sensitive components, in particular of electronic components and / or the emission of noise. The fan attachment 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 known as the body. The fan attachment is preferably designed to attach the fan unit directly to the hob plate and / or directly to the kitchen worktop and / or to the kitchen base cabinet, in particular at least one horizontal and / or vertical wall of the kitchen base cabinet. This is understood to mean that the fastening does not take place via a housing of the extractor device and / or a hob, and that the fan fastening is not part of a corresponding housing. The fan fastening can be a component that is independent of further components of the extractor device and / or of a hob, in particular of any housing. This advantageously achieves that a connection of the fan unit to structures which carry sensitive components, in particular electronic modules, is avoided. The hob plate and / or the kitchen furniture are usually designed to be very rigid, as a result of which they do not tend to vibrate and thus do not tend to emit noises. The extractor device is therefore particularly robust and quiet in operation. Preferably, the extractor device is developed with at least one of the features of the extractor device described above.

According to one aspect of the invention, the fan fastening comprises at least one damping element for damping vibrations. The damping element is preferably arranged between the fan unit and the hob plate and / or the kitchen furniture. The damping element can have a rubber-elastic material. The fan attachment can be designed to be flexible in shape. The separate design of the fan fastening of further components of the cooktop system, in particular the fume extractor device, enables simple and economical integration of a corresponding damping element into the fan fastening.

The fan fastening can be made in one piece or in several pieces. The fan fastening preferably comprises at least one fan connection means for fastening to the fan unit and at least one plate connection means for connection to the hob plate and / or the kitchen furniture. The fan connection means and the plate connection means can preferably be connected to one another in a reversible manner. This simplifies the assembly of the extractor device.

According to a further aspect of the invention, the fan fastening is designed to rest on the kitchen worktop from above and / or to connect to the kitchen worktop from below. To connect to the kitchen worktop from below, the fan fastening, in particular the plate connection means, can be glued and / or screwed to the kitchen worktop. The bond can be designed to dampen vibrations and for this purpose comprise a rubber-elastic material. The fan fastening, in particular the panel connection means, can rest from above on the kitchen worktop without any further fastening or can additionally be glued or screwed to it. A layer made of a rubber-elastic material can be provided between the kitchen worktop and the fan fastening for vibration damping and / or for better load distribution. The fan unit can thus be fastened in a particularly robust manner and avoiding transmission of vibrations to other components of the extractor device or the hob system.

According to a further aspect of the invention, the hob plate rests from above on the fan fastening, in particular on the plate connection means. The hob plate and the fan fastening are preferably designed in such a way that a surface of the hob plate can be fastened flush with a surface of the kitchen worktop.

The fan fastening preferably comprises a positioning means for compensating for dimensional tolerances when fastening the fan unit to the kitchen furniture and / or the hob plate. The positioning means can be designed in the form of at least one elongated hole and / or at least one guide slot.

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

As a result of the design of the hob system with an extractor device according to the above description, it is particularly robust and low-noise in operation. The extractor device can be developed with one or more features of the extractor devices according to the description above. The hob 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 to be cooked. The hob plate is preferably designed in one piece, in particular in one piece, and extends in a plan view preferably over at least one, in particular at least two, in particular all of the cooking zones. The cooking vapor inflow opening is preferably arranged in a central area of the hob plate, in particular in a plan view overlapping a geometric centroid of the hob plate. The cooking vapor inflow opening preferably penetrates the hob plate.

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 vapor inflow openings which preferably penetrate the hob plate.

According to a further aspect of the invention, the fan motor is arranged in a plan view at a distance from the geometric centroid of the hob plate. This advantageously means that the hob plate shields the fan motor from overflow liquids. The fan motor is therefore particularly reliable against overflow liquids protected. A distance between the axis of rotation of the fan motor and the geometric centroid is preferably at least 40 mm, in particular at least 60 mm, in particular at least 80 mm, in particular at least 100 mm.

According to a further aspect of the invention, the hob system is designed as an assembly unit. This is understood to mean that the at least one extractor device and the at least one hob are integrally connected to one another in the delivery state. The hob system designed as an assembly unit can thus be installed as a unit, for example inserted into a kitchen worktop.

Fig. 1

eine perspektivische Darstellung eines in einem Küchenunterschrank verbauten Kochfeldsystems mit einem Kochfeld und einer Dunstabzugsvorrichtung,

Fig. 2

eine Schnittdarstellung des Kochfeldsystems in Fig. 1, wobei die Dunstabzugsvorrichtung eine Lüftereinheit mit einem Lüfterrad und einem unterhalb des Lüfterrads befestigten Lüftermotor aufweist,

Fig. 3

eine Detaildarstellung der Befestigung des Lüftermotors in Fig. 2, wobei der Lüftermotor an einem als Tragstruktur ausgebildeten Ansaugkanal befestigt ist,

Fig. 4

eine Schnittdarstellung eines Kochfeldsystems gemäß einem weiteren Ausführungsbeispiel, wobei das Kochfeldsystem eine Dunstabzugsvorrichtung mit einer Lüftereinheit aufweist, welche an einer Kochfeldplatte befestigt ist,

Fig. 5

eine Schnittdarstellung eines Kochfeldsystems gemäß einem weiteren Ausführungsbeispiel, wobei das Kochfeldsystem eine Dunstabzugsvorrichtung mit einer Lüftereinheit umfasst, welche an der Unterseite einer Küchenarbeitsplatte befestigt ist, und

Fig. 6

eine Schnittdarstellung eines Kochfeldsystems gemäß einem weiteren Ausführungsbeispiel, wobei das Kochfeldsystem eine Dunstabzugsvorrichtung mit einer Lüftereinheit aufweist, welche mittels einer Lüfter-Befestigung an einer Küchenarbeitsplatte befestigt ist, wobei die Lüfter-Befestigung von oben auf der Küchenarbeitsplatte aufliegt.

Further advantages, features and details of the invention emerge from the following description of several exemplary embodiments on the basis of the figures. Show it:

Fig. 1

a perspective view of a cooktop system built into a kitchen base unit with a cooktop and an extractor device,

Fig. 2

a sectional view of the hob system in Fig. 1 , wherein the extractor device has a fan unit with a fan wheel and a fan motor fastened below the fan wheel,

Fig. 3

a detailed representation of the fastening of the fan motor in Fig. 2 , wherein the fan motor is attached to an intake duct designed as a support structure,

Fig. 4

a sectional view of a hob system according to a further embodiment, wherein the hob system has an extractor device with a fan unit which is attached to a hob plate,

Fig. 5

a sectional view of a hob system according to a further embodiment, wherein the hob system comprises an extractor device with a fan unit, which is attached to the underside of a kitchen worktop, and

Fig. 6

a sectional view of a hob system according to a further embodiment, wherein the hob system has an extractor device with a fan unit, which is attached to a kitchen worktop by means of a fan attachment, the fan attachment rests on the kitchen worktop from above.

Based on FIGS. 1 to 3 a first embodiment of a hob system 1 with a hob 2 and an extractor device 3 for extracting cooking vapors downwards is described. A common control device 4 is provided for controlling the hob 2 and the extractor device 3. The hob system 1 is installed in a corresponding recess in a kitchen worktop 6 by means of an installation frame 5. The kitchen worktop 6 is placed on a kitchen cabinet 7. The kitchen worktop 6 and the kitchen base cabinet 7 are components 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.

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 hotplates, which are designed as induction hotplates 10.

The fume extractor device 3 comprises a cooking vapors inflow opening 11, a fan unit 12 for extracting the cooking vapors through the cooking vapors inflow opening 11 and an intake duct 13 connected to the fan unit 12 in a fluid-conducting manner for guiding the cooking vapors.

An inflow grille 14 is arranged at the cooking vapor inflow opening 11. The extractor device 3 further comprises a combination filter 15. The combination filter 15 is designed to filter fats and odors from the cooking vapors. In particular, the combination filter 15 comprises a grease filter and an odor filter for this purpose. The intake duct 13 extends between the inflow grille 14 and the fan unit 12 and is also referred to as a vacuum duct. The combination filter 15 is arranged in the suction channel 13. An Indian Fig. 2 The flow path 16 shown illustrates the air flow. Downstream of the fan unit 12 there is an overpressure channel (not shown) for conveying the cooking vapors. An odor filter, in particular an activated carbon filter, is preferably arranged in the overpressure channel. The overpressure duct can be designed to operate the extractor device 3 in recirculation mode to return the cooking vapors to the environment and / or to operate the extractor device 3 in exhaust air mode to guide the cooking vapors, in particular through an outer wall of the building, into the environment.

The hob system 1 is designed as an assembly unit. For this purpose, the hob 2 and the extractor device 3, in particular in the delivery state, are connected to one another to form a combination device.

The cooking vapors inflow opening 11 overlaps a geometric center of area 17 of the hob plate 9 in a plan view. In particular, the cooking vapors inflow opening 11 is circular in the plan view. The cooking vapor inflow opening 11 is arranged centrally on the hob plate 9, in particular concentrically to the geometric centroid 17.

The fan unit 12 comprises a fan wheel 18 and a fan motor 19 for driving the fan wheel 18 in rotation. In the top view, the fan motor 19 is arranged at a distance from the geometric centroid 17 of the hob plate 9. A distance a _GM between the geometric centroid 17 and the fan motor 19 is 120 mm.

In the top view, the fan wheel 18 is arranged at a distance from the geometric center of gravity 17 of the hob plate and at a distance from the cooking vapor inflow opening 11. A distance a _GR between the geometric center of gravity 17 and the fan wheel 18 is 80 mm. The distance a _ER between the cooking vapor inflow opening 11 and the fan wheel 18 is 40 mm.

A fan axis 20 of the fan wheel 18 is oriented vertically. The fan axis 20 is arranged concentrically to the axis of rotation of the fan motor 19. The fan axis 20 is arranged from the geometric center of gravity 17 of the hob plate 9 by the distance a _GA of 160 mm.

The fan motor 19 is connected to the fan wheel 18 via a drive shaft 21 to transmit torque. 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 vapor inflow 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 in one piece with the suction channel 13. In order to protect the fan motor 19 from overflow liquids, the liquid barrier 22 protrudes above an underside 23 of the intake duct 13. In particular, a height h of the liquid barrier 22, in particular of an overflow collar 24, with respect to the underside 23 of the suction channel 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 suction channel 13.

The suction channel 13 is designed in such a way that the cooking vapors sucked in are guided in an upward direction to the fan wheel 18. The suction channel 13 is thus designed in such a way that the fan wheel 18 draws in the cooking vapors in a vertical direction upwards. For this purpose, the intake channel 13 extends at least in sections into an area below the fan wheel 18. The fan wheel 18 overlaps the intake channel 13 in a plan view. This advantageously ensures that the fan wheel 18 does not come into contact with overflow liquid either.

The fan motor 19 is fastened to a support structure 25 which is arranged below the fan wheel 18. The support structure 25 is formed by the intake duct 13. The intake duct 13 has a not shown for this purpose Surface stiffening, in particular stiffening ribs, on. The stiffening ribs can be formed in one piece with the intake duct 13. The stiffening ribs are preferably arranged on an outside of the suction channel 13 that is not wetted by the cooking vapor flow. The intake channel 13 is preferably produced, in particular in a single process step, in an original molding process, for example in an injection molding process.

The liquid barrier 22 is designed to be concavely curved in order to guide the flow with reduced resistance. In particular, the liquid barrier 22 is arcuate, in particular a circular arc.

The liquid barrier 22 has a flow guide element 26. The flow guide element 26 is designed to split 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 top 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 fastened to the support structure 25 exclusively below the fan wheel 18, a disruptive influence from the fan motor 19 induced magnetic fields 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.

The electronics can be heating and / or control electronics for the hobs 2. In particular, the heating electronics are designed to operate induction cooking zones 10. The control electronics are part of the control device 4.

The mode of operation of the hob system 1, the hob 2 and the extractor device 3 is as follows:

The control device 4 is in an energy-transmitting connection with the hob 2 and the extractor device 3. By means of a user input via the user interface 8, one or more of the induction hotplates 10 can be activated. Food 29 arranged on the respective induction cooking zones 10 is heated and cooking vapors are generated. The extractor device 3 is activated by means of the control device 4, with electrical power being provided 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 sucked in from an area above the food 29 along the flow path 16 through the cooking vapor inflow opening 11 into the suction channel 13. Fats and odors are filtered out of the cooking vapors in the combination filter 15. The cooking vapors are conducted along the suction channel 13 and sucked in in a vertical direction upwards to the fan wheel 18, in particular into a fan housing 30 of the fan unit 12.

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 has the flow guide element 26, this flow around can take place with particularly low resistance. The concave design of the liquid barrier 22 also promotes the flow-efficient suction of cooking vapors in the upward direction of the fan wheel 18.

Because the fan wheel 18 and the fan motor 19 are arranged at a distance from the geometric center of gravity 17 of the hob plate 9 and at a distance from the cooking vapor inflow opening 11, they are shielded from the overflow liquid entering through the cooking vapor inflow opening 11. The suction of the cooking vapors in the upward direction protects in particular the fan wheel 18 from coming into contact with overflow liquid. The penetration of the overflow liquid to the fan motor 19 and to the drive shaft 21 is prevented by the liquid barrier 22. The hob system 1, in particular the extractor device 3, is therefore particularly robust and can be operated safely.

Based on Fig. 4 a further embodiment of the hob system 1 is described. In contrast to the embodiment described above, the extractor device 3 comprises a fan attachment 31 for attaching the fan unit 12 to the hob plate 9. Another difference is that the suction channel 13 is designed in this way for fluid-conducting connection of the cooking vapor inflow opening 11 to the fan unit 12 is that the cooking vapors are sucked into the fan unit 12 in a downward direction.

The fan fastening 31 is designed in the form of an angle, in particular an angled sheet metal, in particular a metal sheet. The fan fastening 31 is glued to the hob plate 9. The hob 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.

Because the fan unit 12 is fastened to the hob plate 9 by means of the fan fastening 31, the transmission of vibrations, which occur during operation of the fan motor 19 and the fan wheel 18, to the electronics for controlling and / or heating the hob can be reduced. By attaching the fan unit 12 to the hob plate 9, which is usually designed to be particularly rigid, the excitation of vibrations on the hob system 1, in particular on the electronics housing 27, can be avoided. The hob system 1 is therefore particularly quiet and robust in operation.

The fan fastening 31 preferably has at least one vibration damping element. The vibration damping element can for example comprise a rubber-elastic material.

How the in the Fig. 4 The hob system 1 shown corresponds to the mode of operation of the hob system 1 according to the exemplary embodiment described above.

Based on Fig. 5 a further embodiment of the hob system 1 is described. In contrast to the embodiments described above, the suction channel 13 extending between the cooking vapors inflow opening 11 and the fan unit 12 is designed in such a way that the cooking vapors flow into the fan unit 12 in both the upward and downward directions. For this purpose, the intake channel 13 has two intake channel sections 32, 33 overlapping the fan wheel 18 in a plan view, the first intake channel section 32 being above the Fan wheel 18 is arranged and wherein the second intake channel section 33 is arranged below the fan wheel 18. The feeding of the cooking vapors to the fan wheel 18 can thus take place in a particularly flow-efficient manner.

The fan motor 19 is attached to a liquid barrier 22 which is fastened to the support structure 25. In particular, the fan motor 19 is placed on the liquid barrier 22 and is fastened to the support structure 25 by means of this. 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 fastening 31. The fan unit 12, in particular the fan wheel 18 and the fan motor 19, are thus fastened to the underside 34 by means of the fan fastening 31. This enables a particularly robust, rigid and low-vibration fastening of the fan unit 12 during operation.

The fan wheel 18 is detachably connected to the fan motor 19. In particular, a reversibly releasable fan clutch 35 is provided between the fan wheel 18 and the fan motor 19 for this purpose.

The mode of operation of the hob system 1 according to that shown in FIG Fig. 5 The illustrated embodiment corresponds to the mode of operation of the hob system 1 according to the embodiments described above.

Based on Fig. 6 a further exemplary embodiment of a hob system 1 of a fan fastening 31 is described. In contrast to the embodiments described above, the fan fastening 31 is designed to rest on the kitchen worktop 6 from above. The fact that the fan attachment 31 to rest on the kitchen worktop 6 is formed from above, the hob system 1 can be easily inserted from above into a corresponding recess in the kitchen worktop 6.

The hob plate 9 rests on the fan fastening 31 from above. The fan fastening 31 is preferably connected to the hob plate 9, in particular glued to it. The assembly of the hob system 1 on the kitchen worktop 6 is made particularly simple by connecting the fan attachment 31 to the hob plate 9. Alternatively, there is no, in particular no direct, connection between the fan fastening 31 and the hob plate 9.

The mode of operation of the hob system 1 according to that shown in FIG Fig. 6 The illustrated embodiment corresponds to the mode of operation of the hob system 1 according to the embodiments described above.

Because the fan motor 19 is attached to a support structure 25 arranged below the fan wheel 18, a particularly robust, low-vibration and low-noise attachment can be ensured during operation. By designing the suction channel 13 in such a way that the cooking vapors are sucked into the fan unit 12 in an upward direction, the fan unit 12, in particular the fan motor 19, is particularly reliably protected from overflow liquids. The fastening of the fan unit 12 by means of the fan fastening 31 on the hob plate 9 or on the kitchen worktop 6 enables the fan unit 12 to be mounted in a rigid, robust and low-vibration manner.

Claims (15)

Hob system (1) for insertion into a kitchen worktop (6), having 1.1. at least one extractor device for the extraction of cooking vapors downwards, with 1.1.1. at least one cooking vapors inflow opening (11) for sucking in the cooking vapors in a downward direction, 1.1.2. at least one fan unit (12) for sucking in the cooking vapors, which has a fan wheel (18) and a fan motor (19) for rotating the fan wheel (18), and 1.1.3. an intake duct (13) for fluidly connecting the at least one cooking vapor inflow 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 food (29), and 1.2.2. at least one hotplate (10) for heating the food (29) arranged on the hob plate (9),
marked by 1.3. a fastening of the fan motor (19) to a support structure (25) arranged below the fan wheel (18). Hob system (1) according to Claim 1, characterized in that the support structure (25) is formed by the intake duct (13) or is connected to it. Cooktop system (1) according to Claim 1 or 2, characterized by a liquid barrier (22) arranged between the at least one cooking vapor inflow opening (11) and the fan motor (19). Hob system (1) according to Claim 3, characterized in that the liquid barrier (22) completely surrounds a fan axis (20) of the fan wheel (18) in the circumferential direction. Hob system (1) according to Claim 3 or 4, characterized in that the liquid barrier (22) comprises at least one flow guide element (26). Cooktop system (1) according to one of Claims 3 to 5, characterized in that the liquid barrier (22) is designed to be concavely curved, at least in some areas, in order to guide the flow with reduced resistance. Hob system (1) according to one of Claims 3 to 6, characterized in that the liquid barrier (22) is part of the supporting structure (25), the fan motor (19) being attached to the liquid barrier (22). Hob system (1) according to one of the preceding claims, characterized in that the suction channel (13) projects beyond the fan wheel (18) by at least 20 mm in the vertical direction downwards. Hob system (1) according to one of the preceding claims, characterized in that a fan axis (20) of the fan wheel (18) is oriented vertically. Hob system (1) according to 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) in a plan view spaced apart from the at least one cooking vapor Inflow opening (11) are arranged. Hob system (1) according to one of the preceding claims, characterized in that the at least one fan unit (12) is designed in such a way that cooking vapors are sucked into the at least one fan unit (12) in an upward direction. Hob system (1) according to one of the preceding claims, characterized in that the fan motor (19) rests on the support structure (25) from above. Hob system (1) according to one of the preceding claims, characterized in that it is designed as an assembly unit. Fume extractor device (3) for extracting cooking vapors downwards for a hob system (1) for insertion into a kitchen worktop (6) 14.1. at least one cooking vapors inflow opening (11), 14.2. at least one fan unit (12) for sucking in the cooking vapors, with 14.2.1. a fan wheel (18) and 14.2.2. a fan motor (19) for rotating the fan wheel (18),
marked by 14.3. a fan attachment (31) for attaching the at least one fan unit (12) to a hob plate (9) and / or to kitchen furniture (6, 7). Fume extractor device according to claim 14, characterized in that the fan attachment (31) is designed to rest on a kitchen worktop (6) of the kitchen furniture from above or to connect to the kitchen worktop (6) from below.

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