Extractor fan for extracting cooking fumes downwards

Abstract

Extractor device (2) for extracting cooking fumes downwards, comprising 1.1 at least one fan (14) for sucking in cooking fumes, 1.2. an inlet opening (11) for the entry of cooking fumes into the extractor device (2), 1.3. a filter seat (19) on which at least one filter (20) for filtering the cooking fumes can be arranged, 1.4. wherein the filter seat (19) has a flow opening (22) which can be covered by the at least one filter (20) and through which the cooking fumes can flow, said opening having a main dimension (S F ) which is larger than a main dimension (S E ) of the inlet opening (11), and 1.5. a filter change chamber (21) extending between the inlet opening (11) and the at least one filter seat (19), 1.6. wherein the filter replacement chamber (21) is designed such that the at least one filter (20) can be reversibly removed from the filter seat (19) through the inlet opening (11), and 1.7. wherein a construction height of the extractor device (2) between the inlet opening (11) and a bottom side of a negative pressure duct section (18) and / or a bottom side of the at least one fan (14) is at most 250 mm.

Description

[0001] The invention relates to an extractor hood. Furthermore, the invention is directed to a cooktop system.

[0002] WO 2017 / 103708 A1 discloses an extractor device for extracting cooking fumes downwards. The extractor device comprises a fan for drawing in the cooking fumes and a filter seat arranged downstream of the fan, on which a filter for filtering the cooking fumes can be arranged. For reversible removal of the filter, the extractor device has a removal opening which penetrates a cooking plate of a cooktop adjacent to an inlet opening. In the area of ​​the removal opening, the cooking plate is mechanically weakened and is not available for cooking zones for heating food. The removal opening, which is only required for maintenance purposes, contradicts a simple and uncluttered appearance of the extractor device.

[0003] Extractor hoods are also known from EP 3 374 054 B1, DE 10 2016 109 136 A1 and DE 20 2008 013 350 U1.

[0004] It is an object of the invention to improve an extractor device.

[0005] This object is achieved by an extractor device having the features of claim 1.

[0006] The flow opening of the filter seat can have a main dimension that is larger than a main dimension of the inlet opening. The flow cross-section of the flow channel can thus be particularly large in the region of the at least one filter relative to a main dimension of the inlet opening. This advantageously achieves a particularly high ratio between filter efficiency and pressure loss, allowing the extractor device to be operated particularly efficiently.

[0007] Preferably, the ratio between the main dimension of the flow opening and the main dimension of the inflow opening is at least 1, in particular at least 1.2, in particular at least 1.5, in particular at least 2, in particular at least 2.5, in particular at least 3.

[0008] An opening area of ​​the flow opening can be larger than an inflow area of ​​the inflow opening. The ratio between the opening area and the inflow opening is preferably at least 1, in particular at least 1.5, in particular at least 2, in particular at least 2.5, in particular at least 3. This advantageously ensures that the ratio between a filtering effect of the at least one filter and a pressure loss across the at least one filter is particularly high.

[0009] The filter replacement space extending between the filter seat and the inlet opening can be designed such that the at least one filter can be reversibly removed from the filter seat through the inlet opening. The accessibility of the inlet opening and thus of the filter from an area above the extractor hood eliminates the need for laborious and complicated removal via a sub-space of the extractor hood. The reversible removability of the filter through the inlet opening ensures that an area adjacent to the inlet opening, in particular the top side of a cooktop, is kept free of additional removal openings. The top side of the cooktop is thus available for heating food. An additional sealing device to protect such removal openings from overflowing liquids can be dispensed with.The cooktop is not structurally weakened by the addition of additional extraction openings. The extractor unit has a simple and uncluttered appearance overall.

[0010] The filter change chamber creates a spatial connection between the inlet opening and the filter seat. In the filter change chamber, the at least one filter can be moved between the filter seat and the inlet opening. For this purpose, the filter change chamber has an internal free cross-section at every point that is larger than a cross-section of the at least one filter. The filter change chamber can be formed, in particular in sections, by a flow channel for guiding the cooking vapors. This advantageously means that additional structures for forming the filter change chamber can be dispensed with. Alternatively, the filter change chamber can be formed, in particular in sections, outside the flow channel.

[0011] The extractor hood device can have a height of 250 mm between the inlet opening and a bottom side of the negative pressure duct section and / or a bottom side of the at least one fan.

[0012] Preferably, the filter is arranged upstream of the filter seat. By arranging the filter upstream of the filter seat, the cooking fume stream presses the filter against the filter seat when the extractor is in operation. This allows the filter to be attached particularly firmly, and in particular tightly, to the filter seat.

[0013] The extractor device may have an inlet opening for the entry of cooking fumes into the extractor device. This means that the extractor device according to the invention has at least one inlet opening. The extractor device may also have at least two, in particular at least three, in particular at least four inlet openings. The inlet opening is preferably round, in particular circular or non-circular, in particular oval, or in the shape of a polygon, in particular in the shape of a rectangle, in particular in the shape of a square.

[0014] The extractor hood device can have at least one fan. The extractor hood device can also have at least two, in particular at least three, in particular at least four, fans. The at least one fan can be arranged at a distance from a geometric center of gravity of the inlet opening in a plan view. Alternatively, the at least one fan can be arranged concentrically with the inlet opening. The concentric arrangement of the fan relative to the inlet opening advantageously ensures that cooking fumes are drawn in particularly efficiently in terms of fluid mechanics. An axis of rotation of the at least one fan can be oriented horizontally or vertically.

[0015] The at least one filter can be arranged on the filter seat. Preferably, at least two, in particular at least three, in particular at least four, in particular at least five, filters can be arranged on the filter seat. By arranging multiple filters on the filter seat, the filter surface and / or a flow opening of the filter seat can be enlarged, wherein the reversible removability of the at least one filter from the filter seat through the inflow opening is retained. Preferably, the at least two filters are designed to be attachable to one another, in particular in a fluid-tight manner.

[0016] Preferably, the at least one filter can be removed manually, in particular manually and / or without tools, from the filter seat through the inlet opening. The filter change chamber and / or the filter seat can be designed accordingly for this purpose.

[0017] The at least one filter can be arranged in a positive pressure duct section. The positive pressure duct section is understood to be the section of the flow duct located downstream of the at least one fan. This advantageously ensures that the flow resistance of the at least one filter has a lesser influence on the extraction performance of the extractor device than a filter arranged in a negative pressure duct section. The negative pressure duct section is understood to be the section of the flow duct located upstream of the at least one fan. In addition, the reversible removal of the filter through the inlet opening promotes regular filter changes and / or filter cleaning. This reduces the flow resistance of the filter and maintains the function of the extractor device.

[0018] A guide device for the guided displacement of the at least one filter can be arranged in the filter change chamber. The guide device can be formed by a wall of the filter change chamber. Preferably, the guide device is designed for linear mounting of the at least one filter. With linear mounting, the displacement can occur exclusively along a line. The guide device, together with the at least one filter, can form a tongue and groove connection and / or a slotted guide. The guide device can also be designed in the form of a channel in which the at least one filter is mounted for linear displacement. This advantageously ensures that the at least one filter can be reliably removed from the filter seat, in particular without tilting.

[0019] The filter seat can have a sealant and / or a sealing surface for fluid-tight connection to the at least one filter. Preferably, the sealant completely surrounds the flow opening of the filter seat. The sealant can be designed to interact with a sealing surface of the at least one filter. Alternatively, the filter seat can have the sealing surface and the at least one filter can have the sealant. The fluid-tight connection of the at least one filter to the filter seat ensures that the entire cooking vapor flow is guided through the at least one filter and does not flow around it.

[0020] A transport channel through which the at least one filter can be displaced can be arranged in the filter change chamber. The transport channel can extend between the vacuum channel section and the filter seat. The transport channel is preferably arranged outside the at least one fan. Advantageously, the transport channel enables a particularly short connection between the filter seat and the vacuum channel section. The length of the transport channel is preferably less than 200 mm, in particular less than 150 mm, in particular less than 100 mm, in particular less than 70 mm, in particular less than 50 mm, in particular less than 25 mm, in particular less than 10 mm. This enables the reversible removal of the filter from the filter seat without it having to be guided through a fan housing of the fan.

[0021] Preferably, the transport channel is fluid-tight and connected to the vacuum channel section and the overpressure channel section in a fluid-tight manner. This advantageously ensures that both the vacuum channel section and the overpressure channel section are fluid-tight to the environment.

[0022] A closure flap can be arranged in the filter change chamber for reversibly closing it off against the flow of cooking fumes. The closure flap is preferably designed to fluid-tightly separate a section of the filter change chamber connected to the overpressure channel section from a section of the filter change chamber connected to the overpressure channel section. The closure flap is preferably designed to close the transport channel. The closure flap can be arranged within the transport channel or at one of the two ends of the transport channel. A closure flap can also be arranged at each end of the transport channel. The closure flap can be displaceable between a closed position and an open position. The closure flap can be designed, for example, as an articulated flap or as a displaceably mounted disc.The at least one filter can be reversibly removed from the filter seat in the open position. This advantageously ensures that no pressure equalization can occur between the overpressure channel section and the underpressure channel section in the closed position.

[0023] Preferably, the closure flap is moved toward the positive pressure duct section when shifted to the open position. This ensures that a pressure difference between the positive pressure duct section and the negative pressure duct section promotes the closure of the closure flap during operation of the extractor device.

[0024] The extractor hood device can have a control unit for operating the at least one fan. The extractor hood device can have a sensor device that is signal-connected to the control unit. The control unit is preferably designed to interrupt the operation of the at least one fan based on a signal from the control device. This advantageously ensures that the operation of the at least one fan can be interrupted if there is a danger to a user and / or the extractor hood device is not operational.

[0025] The sensor device can comprise a filter sensor for detecting the position of the at least one filter on the filter seat. The filter sensor can be configured as an end-stop sensor, in particular as a pressure switch or a magnetic switch, or in the form of a light barrier. Detecting the position of the at least one filter on the filter seat ensures that the control unit can interrupt the operation of the at least one fan based on a signal from the sensor device if the at least one filter is missing and / or incorrectly positioned on the filter seat.

[0026] The sensor device can comprise a shutter sensor for detecting the position of the shutter. The shutter sensor is preferably designed as a push button, a toggle switch, a magnetic switch, an inductive switch, a capacitive switch, or a light barrier. This advantageously ensures that the control unit can interrupt the operation of the at least one fan based on a signal from the sensor device when the shutter is in the open position.

[0027] The extractor hood device can have a drive device for the at least partially automated displacement of the at least one filter in the filter change chamber. The drive device can have a drive motor and a drive gear. Preferably, the drive device, in particular the drive gear, is engaged with the at least one filter. The at least one filter can have a drive engagement for this purpose. Preferably, the drive device is designed to displace the at least one filter to the filter seat. This makes it possible to achieve particularly precise positioning of the at least one filter to the filter seat. Preferably, the at least one filter is first introduced manually, in particular by hand, into the filter change chamber before the at least one filter is displaced to the filter seat by means of the drive device.

[0028] The drive device can be connected to the at least one filter via a gear or a belt, in particular a toothed belt, or a linear drive.

[0029] In the following, further features of the extractor device according to the invention are listed, which can be freely combined with the features mentioned so far.

[0030] The at least one fan can be designed as a radial fan, a centrifugal fan or an axial fan.

[0031] Preferably, the extractor extraction device has a construction height of at most 220 mm, in particular at most 200 mm, in particular at most 175 mm, in particular at most 150 mm, between the inlet opening and an underside of the negative pressure duct section and / or an underside of the at least one fan.

[0032] The extractor hood can have a reversibly deformable filter. Reversible deformability means that the deformation does not result in mechanical failure of the filter. Preferably, the filter is purely elastically reversibly deformable. The filter can be designed as an odor filter. The filter can also be designed as a grease filter and / or as a moisture filter. The filter can be designed to be stretchable in the direction of its main dimension. The filter can also be designed to be torsionally flexible about its central longitudinal axis. The filter can be flexible about at least one axis running transversely to the main dimension. The filter is preferably designed to be rollable. The filter can have at least two filter segments that can be reversibly attached to one another.Preferably, the at least two filter segments are hinged to one another and / or are movable relative to one another, in particular connected by a strap and / or a cord. The segmented design of the filter ensures easy and trouble-free removal of the filter from the filter seat of the extractor device.

[0033] The filter can be designed to be flexible. The filter can have a flexible, particularly flexible, filter frame. The filter frame is preferably arranged in a neutral fiber of the filter. By arranging the filter frame in the neutral fiber of the filter, the length of the filter frame essentially does not change due to deformation of the filter. The filter frame can be designed to be flexible.

[0034] Alternatively, the filter can be designed to be torsionally flexible and / or stretchable. The filter frame can be located in the neutral fiber or in the area of ​​a smallest convex surface of the filter, or in between.

[0035] The filter may have at least one fold. The filter is preferably pleated. This allows the filter to be deformable. The folds may also increase the surface area of ​​the filter. This may improve the filter's effectiveness.

[0036] Preferably, the filter is displaceable between a first and a second filter shape. In the first filter shape, a main dimension of the filter can be larger than in the second filter shape. Preferably, a ratio between the main dimensions of the filter in the first and second filter shapes is at least 1.2, in particular at least 1.5, in particular at least 2, in particular at least 3, in particular at least 4.

[0037] The filter can also be designed to be flexible about an axis transverse to its longitudinal axis. Preferably, the filter is flexible about this axis by at least 10°, in particular at least 20°, in particular at least 30°, in particular at least 45°, in particular at least 60°.

[0038] The at least one filter can have an actuating means. The actuating means can be designed as a handle for manual, in particular hand-held, removal from the extractor device. The actuating means can also be designed as a strap or cord. This facilitates the reversible removal of the filter.

[0039] The extractor device may comprise at least one such filter. Preferably, the main dimension of the filter is larger than the main dimension of the inlet opening. Preferably, the ratio between the main dimension of the filter and the main dimension of the inlet opening is at least 1, in particular at least 1.2, in particular at least 1.5, in particular at least 2, in particular at least 3, in particular at least 4. The flow cross-section of the filter may be larger than the inlet area.

[0040] Another object of the invention is to improve a hob system.

[0041] This object is achieved by a cooktop system comprising at least one extractor hood as described above and at least one cooktop for heating food. The advantages arise from those of the extractor hood.

[0042] The hob preferably has at least one, in particular at least two, in particular at least three, in particular at least four, in particular at least six, cooking zones. The at least one cooking zone can be configured as a radiant heat cooking zone and / or an induction cooking zone and / or a gas cooking zone and / or an electric ground cooking zone. The hob comprises at least one cooking zone plate and / or one energy transmitter per cooking zone.

[0043] The at least one cooking plate can be designed as a pan support and / or a cooking food support. Preferably, the at least one cooking plate of the hob is designed as a glass-ceramic plate. The inlet opening is preferably arranged at the height of the cooking plate. Alternatively, the inlet opening can also be arranged above the cooking plate.

[0044] The inlet opening can be completely surrounded by the cooking plate in a plan view. Preferably, the inlet opening overlaps a geometric centroid of the cooking plate in a plan view. Preferably, the geometric centroid of the inlet opening coincides with the geometric centroid of the cooking plate.

[0045] The cooktop system can be designed as an assembly unit. This means that the cooktop system is fully pre-assembled at the factory. The extractor hood and the cooktops are, in particular, integrated into a single appliance. This allows for particularly simple, quick, and cost-effective installation of the cooktop, particularly by inserting it into a recess in a kitchen worktop. This type of cooktop system is also referred to as a combination appliance.

[0046] Alternatively, the cooktop system can be provided as a kit. The kit can be designed in such a way that it can be at least partially assembled before installation in the recess of the kitchen worktop and / or that final assembly takes place in the recess.

[0047] Preferably, the overall height of the mounting unit is less than 250 mm, in particular less than 220 mm, in particular less than 200 mm, in particular less than 175 mm, in particular less than 150 mm. To determine the overall height, preferably only the at least one hob, the vacuum duct section, and the at least one fan are to be considered.

[0048] Further features, advantages, and details of the invention will become apparent from the following description of the extractor hood and the hob system with reference to the figures. They show: Fig. 1 a plan view of a hob system with a hob and an extractor hood, Fig. 2 a perspective view of the extractor device in Fig. 1, wherein a first filter and a second filter are arranged on a filter seat, Fig. 3 a perspective view of the extractor device in Fig. 1, wherein the first filter is arranged in a filter change space between the filter seat and an inlet opening, Fig. 4 a perspective view of the extractor device in Fig. 1, wherein the first filter is arranged in the filter change chamber and is completely covered by the inlet opening in a plan view, Fig. 5 is a schematic representation of a hob system according to a further embodiment, according to which the filter change chamber has a transport channel for displacing a filter between the filter seat and the inlet opening, wherein the filter is arranged on the filter seat, Fig. 6 a schematic representation of the hob system in Fig. 5, whereby the filter penetrates the inlet opening and partially protrudes into the filter change chamber, Fig. 7 is a schematic representation of an extraction device according to a further embodiment, according to which the filter change chamber comprises a transport channel extending between the filter seat and a negative pressure channel section arranged upstream of a fan, wherein the filter is arranged on the filter seat, Fig. 8 a schematic representation of the trigger device in Fig. 7, wherein the filter is arranged in the filter change chamber and partially projects into the transport channel, Fig. 9 a schematic representation of a hob system according to a further embodiment, according to which a fan comprises a removable fan wheel, wherein the filter change space is formed by a flow channel of the extractor device and wherein the filter is arranged on the filter seat and Fig. 10 is a schematic representation of an extractor device according to an alternative embodiment, according to which the filter is arranged in a curved shape on the filter seat.

[0049] In the following, different details of a hob system 1 and an extractor device 2 are described using the Fig. 1 to Fig. 4 described.

[0050] In Fig. Figure 1 shows a cooktop system 1 with an extractor device 2 for extracting cooking fumes and a cooktop 3 for heating food. The cooktop system 1 is designed as an assembly unit and is fully pre-assembled at the factory. The cooktop system is inserted into a recess 4 of a kitchen worktop 5.

[0051] The hob 3 has a cooking plate 6. Four cooking zones 7 are arranged on the cooking plate 6. The cooking zones 7 have heating electronics (not shown). The heating electronics are enclosed by a hob housing 8.

[0052] The hob system includes a control unit 9. The control unit 9 is in signal communication with a user interface 10. The user interface 10 is attached to the hob plate 6. The hob plate 6 is designed as a glass-ceramic plate, and the user interface 10 is designed as a touch-sensitive screen.

[0053] The hob system 1 has an overall height of 200 mm. The hob system 1 is thus designed as a compact assembly unit.

[0054] The extractor hood device 2 comprises an inlet opening 11. The inlet opening 11 penetrates the cooking plate 6. The inlet opening 11 is arranged in a center of gravity of the cooking plate 6 in a plan view.

[0055] The extractor device 2 has a flow channel 12 connected to the inlet opening 11. Two fan housings 13 are part of the flow channel 12. The two fan housings 13 are each also part of a fan 14. Each fan 14 has a fan wheel 15 and a fan motor 16.

[0056] The extractor device is designed to convey cooking fumes through the inlet opening 11 along the flow channel 12 and through the two fans 14. The flow channel 12 comprises a positive pressure channel section 17 arranged downstream of the fans 14 and a negative pressure channel section 18 arranged upstream of the fans 14 and downstream of the inlet opening 11.

[0057] A filter seat 19 is arranged in the overpressure channel section 17. Two filters 20 for filtering cooking vapors are arranged on the filter seat 19. The two filters 20 are designed as odor filters.

[0058] A filter replacement chamber 21 is arranged between the inlet opening 11 and the filter seat 19. The filter replacement chamber 21 is designed such that the filter 20 can be reversibly removed through the inlet opening 11. For this purpose, the filter replacement chamber 21 has an inner, free cross-section in which the respective filter 20 can be displaced between the filter seat 19 and through the inlet opening 11. The filter seat 19 has a flow opening 22 (not shown). The cooking vapors flow completely through the flow opening 22. When the filter 20 is arranged on the filter seat 19, the two filters 20 completely cover the flow opening 22. The filters 20 are arranged in the flow channel 12 such that the cooking vapor flow flows completely through them.

[0059] The filter seat 19 has a sealing means 23. The sealing means 23 is designed as a sealing lip. The sealing means 23 is made of a rubber-elastic material. The sealing means 23 completely surrounds the flow opening 22. The filter 20 has a sealing surface 24. The sealing surface 24, together with the sealing means 23, forms a fluid-tight connection. Alternatively, the filter 20 can have the sealing means 23 and the filter seat 19 can be formed with a sealing surface 24. When the filter 20 is arranged on the filter seat 19, the filter 20 is connected to the filter seat 19 in a fluid-tight manner. The two filters 20 arranged between the fans 14 and the flow opening 22 are designed so that cooking vapors can flow through them.

[0060] In Fig. 1 and Fig. 2, the two filters 20 are shown in their arrangement on the filter seat 19. In the Fig. 3 and Fig. 4, a first filter 20 is arranged in the filter change chamber 21 between the filter seat 19 and the inlet opening 11. A second filter 20 has already been removed from the extractor device 2 and is not shown.

[0061] The filter replacement chamber 21 has a guide device 25 for the guided movement of the two filters 20. The guide device 25 is formed by the walls of the filter seat 19. When the filters 20 are inserted into the filter seat 19, they are guided between an upper and a lower wall, as well as by a rear wall of the filter seat 19, which has the flow opening 22.

[0062] The filter change chamber 21 comprises a transport channel 26. The transport channel 26 extends between the vacuum channel section 18 and the positive pressure channel section 17. The respective filter 20 can be displaced between the filter seat 19 and the inlet opening 11 through the transport channel 26. The filter change chamber 21 has a closure flap 27. The closure flap 27 is designed to close the filter change chamber 21 in a fluid-tight manner to prevent cooking vapors from flowing through. The closure flap 27 is pivotally mounted on the flow channel 12. The closure flap 27 can be displaced between a closed position 28, in which the filter change chamber 21 is fluid-tightly closed, and an open position 29, in which the filter change chamber is open for the reversible removal of the two filters 20. The closure flap 27 can be opened in the direction of the vacuum channel section 18.Alternatively, the closure flap 27 can also be opened in the direction of the overpressure channel section 17.

[0063] The control unit 9 is designed to operate the hob 3 and the extractor hood 2, in particular the two fans 14. The extractor hood 2 has a sensor device 30. The sensor device 30 comprises a filter sensor 31 for detecting the arrangement of the two filters 20 on the filter seat 19. The sensor device 30 is in signal communication with the control unit 9. The control unit 9 is designed to interrupt the operation of the fan 14 based on a signal from the sensor device 30. The sensor device 30 is designed such that a signal for interrupting the operation of the fan 14 is provided if the filter sensor 31 detects a missing and / or incorrect arrangement of the two filters 20 on the filter seat 19.

[0064] The sensor device 30 has a closure flap sensor 32 for detecting a position of the closure flap 27. The sensor device 30 is configured to provide a signal for interrupting the operation of the fan 14 if the closure flap sensor 32 detects a position of the closure flap 27 outside the closed position 28.

[0065] The flow opening 22 has a main dimension s F The main dimension S F is larger than one main dimension S E the inlet opening 11. An opening area A F the flow opening 22 is larger than an inflow area A E the inlet opening 11.

[0066] The two filters 20 are designed to be deformable. Each filter 20 has a main extension 33. The two filters 20 are formed as a single piece and are rigid in the direction of the main extension 33. The two filters 20 are designed to be flexible about an axis oriented perpendicular to the main extension 33. For reversible removal, each filter 20 is designed to be flexible about a vertical axis.

[0067] The extractor device 2 has a drive device 34 for the automated movement of the two filters 20 in the filter change chamber 21. The drive device 34 is designed to move the respective filter 20 along the guide device 25 to the filter seat 19 or from the filter seat 19 in the direction of the inlet opening 11. The drive device 34 is in signal communication with the filter sensor 31 for the correct positioning of the respective filter 20.

[0068] The hob system 1 works as follows: The hob system 1 is controllable via the control unit 9. User inputs are transmitted from the user interface 10 to the control unit 9. The control unit 9 is in signal communication with the cooking zones 7 and the fan motors 16. The control unit 9 allows the adjustment of the power supplied to the cooking zones 7 and the fan motors 16.

[0069] When the fan motors 16 are supplied with electrical power, a torque is transmitted to the fan wheels 15. The rotating fan wheels 15 generate a negative pressure in the negative pressure duct section 18 that is lower than the ambient pressure and a positive pressure in the positive pressure duct section 17 that is higher than the ambient pressure.

[0070] Heating the food by supplying power to the cooking zones 7 creates cooking vapors above the cooking zone plate 6. Due to the negative pressure prevailing in the negative pressure duct section 18, the cooking vapors are drawn through the inlet opening 11 along the flow channel 12 to the fans 14 and discharged from the extractor device 2 in the positive pressure duct section 17 through the filters 20 and the flow opening 22.

[0071] In Fig. 1 and Fig. 2, the filters 20 are shown arranged on the filter seat 19. The filter sensors 31 detect the arrangement of the filters 20 on the filter seat 19. The closure flap 27 is in the closed position 28. The closure flap sensor 32 detects the arrangement of the closure flap 27 in the closed position 28. The operation of the two fans 14 and their supply with electrical power are thus enabled.

[0072] In Fig. 3 and Fig. 4, the closure flap 27 is arranged in the open position 29. The first filter 20 is displaced along the filter change space 21 in the direction of the inlet opening 11, and the second filter 20 has already been removed from the extractor device 2. The filter sensor 31 detects the displacement of the respective filter 20 from the filter seat 19. The closure flap sensor 32 detects the arrangement of the closure flap 27 in the open position 29. The control unit 9 detects a signal from the sensor device 32 to interrupt the operation of the two fans 14. The operation of the two fan motors 16 is interrupted.

[0073] The removal of the two filters 20 from the filter seat 19 and their insertion into the filter seat 19 is partially automated. For the automated relocation of the respective filter 20, the drive device 24 engages with the respective filter 20. By actuating the drive device 34, the respective filter 20 is relocated along the guide device 25.

[0074] To remove the respective filter 20 through the filter change chamber 21 and the inlet opening 11, it is bent, in particular rolled, around a vertical axis. In the curved form, the filter 20 can be removed from the extractor device through the inlet opening 11.

[0075] To insert the respective filter 20 into the filter seat 19, the respective filter 20 is first deformed, in particular curved around the vertical axis, then introduced through the inlet opening 11 into the vacuum channel section 18 and moved along the filter change chamber 21 through the transport channel 26 and guided by the guide device 25 to the filter seat 19. The displacement of the respective filter 20 is partially automated by actuating the drive device 34. The filter sensors 31 detect the arrangement of the respective filter 20 on the filter seat 19. The closure flap 27 is moved into the closed position 28 and the closure flap sensor 32 detects the arrangement of the closure flap 27 in the closed position 28. The signal to interrupt the operation of the two fans 14 is canceled and the operation of the two fans 14 can be resumed.

[0076] Based on the Fig. 5 and Fig. 6 describes a further embodiment of the invention. In contrast to the previous embodiment, the extractor device 2 has only one fan 14. A single filter 20 can be arranged on the filter seat 19. The movement of the filter 20 within the filter change chamber 21 takes place entirely manually, in particular by hand. The filter change chamber 21 has a transport channel 26. The wall of the transport channel 26 is designed to guide the filter 20 and is part of the guide device 25. The transport channel 26 extends between the negative pressure channel section 18 and the positive pressure channel section 17. On the side of the positive pressure channel section 18, the filter change chamber 21 can be reversibly closed by means of the closure flap 27.

[0077] To remove the filter 20 from the filter seat 19, it is displaced along the transport channel 26. The filter 20 is bent around several axes transverse to the main extension 33. The filter 20 is removed from the inlet opening 11 along its main extension 33.

[0078] Based on the Fig. 7 and Fig. Figure 8 describes a further embodiment of the invention. In contrast to the previous embodiments, the extractor device 2 has a fan 14 and a filter 20 that can be arranged on the filter seat 19, wherein the transport channel 26 is designed to be simply curved. The closure flap 27 is arranged on the side of the overpressure channel section 17 of the transport channel 26. The closure flap 27 can be actuated by the drive device 34. The drive device 34 is designed to displace the filter 20 along the filter change space 21. The flow opening 22 is flat.

[0079] To remove the filter 20 from the extractor device 2, a program for removing the filter 20 is activated in the control unit 9 via the user interface 10. Controlled by the control unit 9, the closure flap 27 is moved from the closed position 28 to the open position 29 by means of the drive device 34. The filter 20 is then moved along the transport channel 26 through the filter change chamber 21 into the vacuum channel section 18 by means of the drive device 34. The filter 20 can then be removed manually from the inlet opening 11.

[0080] Based on the Fig. Figure 9 describes a further embodiment of the invention. In contrast to the previous embodiments, the fan wheel 15 of the fan 14 is arranged centrally below the inlet opening 11. The fan wheel 15 is dimensioned such that it can be removed from the inlet opening 11. The filter change chamber 21 is formed by the flow channel 12.

[0081] To remove the filter 20 from the filter seat 19, the fan wheel 15 is first removed from the flow channel 12 through the inlet opening 11. This releases the filter replacement space 21 formed by the flow channel 12 to such an extent that the filter 20 can be removed from the filter seat 19 through the inlet opening 11. The extractor device 2 according to this embodiment does not have a transport channel 26 and a closure flap 27 is not necessary. The embodiment according to Fig. 9 underlying features can be combined as desired with those of the previous embodiments.

[0082] Based on the Fig. Figure 10 describes a further embodiment of the invention. In contrast to the previous embodiments, the flow opening 22 is curved. The filter 20 is arranged in a curved shape on the filter seat 19. The filter change chamber 21 comprises the transport channel 26 and can be closed by means of the closure flap 27 to prevent cooking vapors from flowing through it.

[0083] The removal of the filter 20 from the filter seat 19 and the insertion of the filter 20 into the filter seat 19 takes place as already described with reference to the embodiments explained above.

[0084] According to a further embodiment not shown, a guide device 25 in the form of a slotted guide is arranged in the filter change chamber 21. To form the slotted guide, the filter change chamber 21 has a groove in which a frame of the filter 20 is mounted so as to be linearly displaceable, at least in sections. The filter seat is flat.

[0085] To remove the filter 20, it is moved along the guide rail, whereby first one end of the filter 20 pointing towards the inlet opening 11 is bent. The filter 20 is then located in the Fig. 10. The filter 20 is displaced further along the guide rail in the direction of the inlet opening 11. To remove the filter 20 from the extractor device 2, the steps already described with reference to the embodiments explained above must be carried out.

Claims

[1] Extractor device (2) for extracting cooking fumes downwards, comprising 1.1 at least one fan (14) for sucking in cooking fumes, 1.

2. an inlet opening (11) for the entry of cooking fumes into the extractor device (2), 1.

3. a filter seat (19) on which at least one filter (20) for filtering the cooking fumes can be arranged, 1.

4. wherein the filter seat (19) has a flow opening (22) which can be covered by the at least one filter (20) and through which the cooking fumes can flow, said opening having a main dimension (S F ) which is larger than a main dimension (S E ) of the inlet opening (11), and 1.

5. a filter change chamber (21) extending between the inlet opening (11) and the at least one filter seat (19), 1.

6. wherein the filter replacement chamber (21) is designed such that the at least one filter (20) can be reversibly removed from the filter seat (19) through the inlet opening (11), and 1.

7. wherein a construction height of the extractor device (2) between the inlet opening (11) and a bottom side of a negative pressure duct section (18) and / or a bottom side of the at least one fan (14) is at most 250 mm. [2] Extractor hood (2) according to claim 1, characterized by that the ratio between the main dimension (S F ) of the flow opening (22) and the main dimension (S E ) of the inlet opening (11) is at least 1.

2. [3] Extractor device (2) according to one of the preceding claims, characterized by that an opening area (A F ) of the flow opening (22) is larger than an inflow area (A E ) of the inlet opening (11). [4] Extractor device (2) according to one of the preceding claims, characterized by that at least two filters (20) are arranged on the filter seat (19) in such a way that the flow opening (22) of the filter seat (19) is enlarged and the reversible removal of the at least two filters (20) from the filter seat (19) through the inflow opening (11) is maintained. [5] Extractor device (2) according to one of the preceding claims, characterized by that it has at least two filters (20) which are designed to be attached to one another in a fluid-tight manner. [6] Extractor device (2) according to one of the preceding claims, characterized by that the at least one filter (20) has at least two filter segments that can be reversibly attached to one another. [7] Extractor device (2) according to one of the preceding claims, characterized by that the at least one filter (20) is designed as an odor filter. [8] Extractor device (2) according to one of the preceding claims, characterized by that a guide device (25) for the guided displacement of the at least one filter (20) is arranged in the filter changing chamber (21). [9] Extractor device (2) according to one of the preceding claims, characterized by a control unit (9) for operating the at least one fan (14) with a sensor device (30) which is in signal connection with the control unit (9), wherein the control unit (9) is designed to interrupt the operation of the at least one fan (14) based on a signal from the sensor device (30). [10] Extractor device (2) according to claim 9, characterized by that the sensor device (30) has a filter sensor (31) for detecting an arrangement of the at least one filter (20) on the filter seat (19). [11] Extractor device (2) according to one of the preceding claims, characterized bya drive device (34) for at least partially automated displacement of the at least one filter (20) in the filter change chamber (21). [12] Extractor device (2) according to one of the preceding claims. characterized by that the at least one filter (20) is designed to be reversibly deformable, wherein it has a flexible filter frame. [13] Hob system (1), comprising 13.

1. at least one extractor device (2) according to one of claims 1 to 12, and 13.

2. at least one cooking hob (3) for heating food. [14] Hob system (1) according to claim 13, characterized by that the inlet opening (11), in a plan view, is completely surrounded by a cooking plate (6) of the cooking surface (3).

Images