Hob system with fan module

Abstract

Hob system (44) with 1.1 at least one hob (43) and 1.2 at least one extractor device (2) with a fan module (1), 1.3 wherein the extractor device (2) is designed in the form of a downdraft system, 1.4 where the fan module (1) 1.4.1 a housing (3) with 1.4.1.1 an inlet opening (4), 1.4.1.2. an outlet opening (5) and 1.4.1.3. a flow channel (6) for the fluid-mechanical connection of the inlet opening (4) with the outlet opening (5) with a spiral-shaped inner region and an outlet region (13) adjoining it downstream, 1.5. wherein the flow channel (6) has a cross-section widening in the direction of flow, 1.6. wherein a sound-insulating element (40) is arranged in the housing (3), and 1.7. wherein the fan module (1) has a total height (h) of not more than 10 cm.

Description

[0001] The invention relates to a hob system with at least one hob and at least one extractor device with a fan module.

[0002] Cooktop systems are known from the prior art. DE 20 2011 005 698 U1 describes a cooktop with central downward extraction of cooking vapors. EP 2 634 434 A1 shows a multi-blade centrifugal fan and an air conditioning system therewith. US 2013 / 0 340 742 A1 relates to a cooktop with a ventilation system and a fan mount therefor. US 6 455 818 B1 describes an exhaust air filter arrangement for a cooking appliance. US 5 000 160 A shows a cooking system with local ventilation. US 4 962 694 A relates to a grill exhaust system.

[0003] An extractor system with a fan module is known, for example, from DE 10 2007 002 241 A1. A radial fan with a fan-motor unit is known from EP 1 000 783 A1 and EP 2 738 394 A1.

[0004] There is a constant need to further develop such extractor systems, especially their fan modules.

[0005] This object is achieved by a hob system with an extractor device with a fan module according to claim 1.

[0006] A sound-insulating element is installed in the fan module's housing. The fan module has a total height (h) of no more than 10 cm.

[0007] The fan module can have a metal housing. A preferred embodiment of the invention involves forming a fan module with a spiral-shaped plastic housing.

[0008] The spiral design of the housing allows the fluid mechanical properties of the housing, in particular of the flow channel connecting the inlet opening of the housing with its outlet opening, to be improved.

[0009] The housing, in particular, has a round outer contour. This allows for the elimination of so-called dead zones. The flow channel is designed to be free of dead zones, particularly in the area surrounding the fan motor.

[0010] The housing in particular has a nautilus-like, bionic shape.

[0011] In particular, the housing may be made of a reinforced plastic. The reinforcement may include a selection from the following list: glass fibers, textile fibers, carbon fibers, talc reinforcement, and reinforcement with other additives.

[0012] According to a further aspect of the invention, the housing is made of plastic. It is made, in particular, of plastic, meaning it is made entirely and exclusively of plastic. It is, in particular, made of a fire-resistant plastic. This, on the one hand, leads to weight savings. On the other hand, it facilitates production and allows for more flexible design of the housing's shape.

[0013] According to one aspect of the invention, the housing is constructed in two or more parts. The housing preferably comprises a lower housing part, also referred to as the housing base or lower shell, and an upper housing part, also referred to as the cover, lid, or upper shell. The upper housing part can, in particular, be removably connected to the lower housing part. It can, in particular, be secured to the lower housing part by means of clamps. A removable design of the upper housing part facilitates maintenance and cleaning of the fan module.

[0014] The inlet opening can in particular have a round, in particular a circular cross-section.

[0015] According to a further aspect of the invention, a connecting piece is provided in the region of the inlet opening, having a shape that tapers at least partially against a flow direction. The connecting piece can, in particular, have a shape that tapers conically or gradually at least partially. It can, in particular, have a double-conical shape, i.e., a shape that tapers conically twice.

[0016] This makes it easier to connect the fan module to a ventilation pipe or hose.

[0017] A conical, particularly a double-conical, design can improve the connection of a ventilation pipe, duct, or hose. It enables particularly secure attachment of a ventilation pipe, duct, or hose to the connection piece.

[0018] A ventilation pipe is understood to be a ventilation pipe with a round, especially circular, cross-section. A ventilation duct, on the other hand, has a particularly elongated cross-section. A ventilation hose is particularly flexible.

[0019] The connection piece can, in particular, have a circular cross-section. At its widest point, particularly at the point directly connected to the housing of the fan module, it can have an outer diameter of slightly more than 150 mm, particularly in the range of 150 mm to 250 mm.

[0020] At its narrowest point, it can have an outer diameter in the range of 80 mm to 150 mm.

[0021] A sealing tape can be applied to the outer diameter of the connection piece. The sealing tape can initially be supplied as a separate part and only applied to the connection piece for the sealed installation of the ventilation pipe, ventilation duct, or ventilation hose. The sealing tape is typically made of foam. It can be self-adhesive on one side.

[0022] In the direction perpendicular to the inlet opening, the connecting piece can have an extension in the range of 0.5 cm to 10 cm, in particular less than 6 cm,

[0023] According to one aspect of the invention, the connecting piece is removable. It can, in particular, be replaceable. This facilitates the use of the fan module with ventilation pipes, ventilation ducts, or ventilation hoses of different diameters. In particular, it is possible to provide different connecting pieces that fit different pipes or hoses.

[0024] According to a further aspect of the invention, the connecting piece is removably attached to the housing by means of a locking closure, in particular a bayonet lock. This enables a particularly simple yet secure connection of the connecting piece to the housing. The connecting piece can be attached to the housing, in particular, by means of pins, lugs, heads, a thread, a groove, rails, or guides.

[0025] The removable connection piece allows for easy installation, even in the base area of ​​a base cabinet. The fan module can be installed in the base area of ​​a base cabinet without having to remove the base cabinet. Removing the connection piece allows the fan module to be installed in the base area, particularly without requiring any modification of the base cabinet. The connection piece can then be reattached to the fan module through a precisely sized recess in the furniture base.

[0026] According to a further aspect of the invention, the housing has an outer cross-section that tapers in the direction of flow in the region of the outlet opening. The outer cross-section of the housing can taper in a beveled or stepped manner in the region of the outlet opening. This facilitates the connection of an additional ventilation duct element to the housing.

[0027] The outlet opening can, in particular, have the cross-section of a flat channel. It particularly has a substantially rectangular, oval, or elliptical cross-section. It preferably has a cross-section with rounded corners. It particularly has a free height in the range of 5 cm to 9 cm and a free width in the range of 10 cm to 25 cm. The cross-section of the outlet opening can, in particular, have an aspect ratio of at least 1.5:1, in particular at least 2:1, in particular at least 3:1, in particular at least 4:1.

[0028] The outlet opening can, in particular, have an elongated cross-section, in particular for connecting a so-called flat channel. The cross-section of the outlet opening can, in particular, have an aspect ratio of at least 1.5:1, in particular at least 2:1; in particular at least 3:1, in particular at least 4:1.

[0029] The outlet opening has in particular a free flow cross-section of at least 50 cm 2 , in particular at least 100 cm 2 , in particular at least 200 cm 2 , in particular at least 250 cm 2 on.

[0030] The outlet opening can be arranged, in particular, at the end of an outlet section, particularly in the form of an outlet nozzle that connects to the flow channel. This also improves the flow characteristics of the fan module.

[0031] The outlet area has an outer wall that connects essentially tangentially to the outer contour of the housing. A slight constriction can be provided in the transition area. This further improves the flow characteristics.

[0032] The exhaust opening can extend in a plane that is oblique, in particular perpendicular, to the plane of the intake opening. The intake opening can extend in a plane that is perpendicular to a rotational axis of the engine. The rotational axis of the engine runs in particular parallel to the vertical direction.

[0033] According to a further aspect of the invention, a motor is arranged inside the housing. The motor can be, in particular, a so-called brushless direct current motor (EC motor, electronically commutated motor). By means of the motor, an air flow can be generated in the flow channel from the inlet opening to the outlet opening. By means of the motor, a negative pressure can be generated, in particular in the area of ​​the inlet opening, and / or a positive pressure can be generated in the area of ​​the outlet opening.

[0034] The motor drives a fan impeller. The fan impeller is typically a forward-curved impeller. This results in advantageously low noise levels while maintaining high power density. A forward-curved fan impeller is particularly suitable for moving large volumes of air in a confined space.

[0035] According to a further aspect of the invention, a flow guide element is arranged in the region of the outlet opening. This allows the flow characteristics to be further improved. The flow guide element can be arranged at an angle to the outlet opening. In particular, it can be arranged at a right angle to the outlet opening.

[0036] According to a further aspect of the invention, at least one flow guide element is provided in the region of the outlet opening.

[0037] This allows the flow characteristics to be improved. The flow guide element can, in particular, reduce the noise generated during operation of the fan module.

[0038] A plate-shaped element can serve as the flow guide element. The flow guide element can, in particular, have dimensions that vary in the direction of flow.

[0039] The flow guide element is particularly designed such that it completely bounds the flow channel laterally in a first, inner region, but increasingly opens it up in a second region adjoining it in the direction of flow. In particular, in the first region, it has an extension perpendicular to the housing lower section that precisely corresponds to the free height of the flow channel in this direction. The extension of the flow guide element in this direction decreases in the outer region adjoining it in the direction of flow. In particular, it decreases continuously in the direction of flow.

[0040] The flow guide element has a substantially rectangular or trapezoidal shape, particularly in the first, inner region. It has, in particular, the shape of a right-angled trapezoid. It has, in particular, a substantially triangular shape in the second, outer region.

[0041] It has been found that a flow guide element designed in this way can reduce noise particularly effectively.

[0042] The flow guide element is particularly directly adjacent to a section that radially defines the inner contour of the flow channel. It is particularly formed integrally with a corresponding section of the inner contour. It can also be arranged freestanding in the outlet area of ​​the fan module.

[0043] One or more such flow guide elements may be provided.

[0044] The flow guide element is arranged in the housing in particular so as to be aligned parallel to the flow direction.

[0045] According to a further aspect of the invention, a plurality of feet and / or fastening elements are provided on the outside of the housing.

[0046] This can simplify and / or improve the installation of the fan module. The feet can be used to decouple the enclosure from the surface, particularly acoustically. Three feet can be provided, in particular. This ensures that the enclosure is always stable. Four or more feet can also be provided. The feet can be height-adjustable.

[0047] The feet can each have a support surface of maximum 10 cm 2 , in particular no more than 5 cm 2 , in particular no more than 3 cm 2 , in particular no more than 2 cm 2 , in particular no more than 1 cm 2 They may have an end piece made of an elastic material, particularly rubber, foam, felt, or cork, at their free end. This allows for particularly efficient noise decoupling.

[0048] The feet can have a length in the range of 1 mm to 30 mm, in particular in the range of 2 mm to 20 mm. Mounting elements can be, in particular, mounting lugs or mounting eyes. They allow for easy installation of the housing below a horizontal surface, in particular a floor ceiling, room ceiling, or furniture ceiling.

[0049] The fan module has a total height of no more than 10 cm. In other words, it is very compact and can be installed in the base of a standard kitchen cabinet. The total height can be measured, in particular, without the removable connection piece in the area of ​​the intake opening.

[0050] In a plane parallel to the inlet opening, the fan module has dimensions of no more than 60 cm x 60 cm, in particular no more than 50 cm x 50 cm, in particular no more than 40 cm x 40 cm, in particular no more than 30 cm x 30 cm. This facilitates installation in the base area of ​​a kitchen cabinet.

[0051] The fan module preferably has a total weight of at most 15 kg, in particular at most 10 kg, in particular at most 5 kg, in particular at most 3 kg, in particular at most 2 kg, in particular at most 1 kg.

[0052] According to a further aspect of the invention, a sound-insulating element is arranged in the flow channel.

[0053] This has made it possible to significantly reduce the noise generated during operation of the fan module.

[0054] In principle, it is also possible to arrange more than one sound-insulating element in the flow channel or to form the sound-insulating element from a plurality of separate sub-elements.

[0055] According to one aspect of the invention, the sound-insulating element comprises a layer of a porous material and / or a fibrous material.

[0056] Such materials result in particularly effective sound insulation. The porous material can, in particular, be a material with open and / or continuous pores. The sound-insulating element can, in particular, comprise at least one layer of a foamed or woven material.

[0057] It can have a single such layer. It can also have several corresponding layers. In particular, it can have several different layers. This allows sound insulation across a wide frequency spectrum to be achieved.

[0058] The sound-insulating element comprises in particular at least one layer of foam.

[0059] According to one aspect of the invention, the sound-insulating element is provided with a fire-retardant coating. The coating can, in particular, be foil-like. The coating can be, in particular, an aluminum coating, in particular an aluminum foil, a synthetic resin coating, a plastic coating, or a bitumen coating.

[0060] The sound-insulating element can be encapsulated in an airtight, particularly moisture-tight manner. This facilitates cleaning of the sound-insulating element and also prevents the absorption of grease and / or water.

[0061] According to one aspect of the invention, the sound-insulating element is designed as a strip-shaped mat. It is made, in particular, of a flexible material. It can thus adapt to the contour of the housing of the fan module.

[0062] The sound-insulating element, in particular, has a height that essentially corresponds to the free height of the flow channel. The sound-insulating element has a thickness in the range from 3 mm to 3 cm, in particular in the range from 5 mm to 1.5 cm, in particular in the range from 7 mm to 1.2 cm. The sound-insulating element has a length of at least 30 cm, in particular at least 50 cm, in particular at least 70 cm. The sound-insulating element, in particular, has a length that is adapted to the dimensions of the housing of the fan module such that, when arranged along a radial outer wall of the housing, it extends over an angular range of at least 180°, in particular at least 225°, in particular at least 270°. It extends, in particular, apart from the outlet region 13, over the entire circumferential area of ​​the housing 3.

[0063] The sound-insulating element can be constructed in several parts. In particular, it can comprise several sub-elements. The sub-elements can be arranged spaced apart from one another, adjacent to one another, or overlapping in the housing.

[0064] According to one aspect of the invention, the sound-insulating element is arranged along an outer wall of the flow channel. It is arranged, in particular, on the inner side of the outer wall of the flow channel, i.e., within the flow channel.

[0065] According to a further aspect of the invention, the sound-absorbing element is arranged in a guide groove in the housing. This ensures a secure hold of the sound-absorbing element.

[0066] According to a further aspect of the invention, the sound-insulating element is arranged in the housing in a replaceable manner. It can be removed from the housing, for example, for cleaning purposes.

[0067] According to a further aspect of the invention, a separate control line is provided for controlling the motor. The fan module comprises, in particular, a power line for connecting the motor to a power source, in particular to the power grid, and the separate control line for controlling the motor. It has been found that this improves the efficiency of the fan module.

[0068] Reinforcing ribs can be provided on the base and / or cover of the housing. The reinforcing ribs can be arranged, at least in sections, along a radial direction. This improves the stability of the housing.

[0069] In a method for operating a fan module according to the above description, a pulse width modulation (PWM) method is provided for controlling the motor. This enables particularly precise and simple control of the motor.

[0070] The advantages of an extractor hood with a fan module as described above arise from those of the fan module.

[0071] The advantages of a hob system with an integrated extractor hood with a corresponding fan module also arise from those described above.

[0072] Further advantages, features, and details of the invention will become apparent from the description of an embodiment with reference to the drawings. They show: Fig. 1 a plan view of an embodiment of a fan module, Fig. 2 a view of the fan module according to Fig. 1 from the bottom, Fig. 3 a view of the fan module according to Fig. 1 with view direction III to the outlet opening against the flow direction, Fig. 4 an enlarged section of area IV from the Fig. 3, Fig. 5 an enlarged detail of area V from the Fig. 2, Fig. 6 an enlarged section of area VI from the Fig. 3, Fig. 7 an enlarged detail of area VII of the Fig. 2, Fig. 8 an exploded view of the fan module according to Fig. 1 and Fig. 9 a schematic representation of a hob system with an extractor device with a fan module according to Fig. 1.

[0073] In the following, with reference to the Fig. 1 to 7, an embodiment of a fan module 1 for an extractor device 2 is described. A fan module 1 for an extractor device 2 comprises a housing 3.

[0074] The housing 3 has an inlet opening 4 and an outlet opening 5. The inlet opening 4 is fluidically connected to the outlet opening 5 via a flow channel 6.

[0075] The flow channel 6 has a cross-section that widens in the flow direction 8. It is arranged, in particular, circumferentially to a fan motor 7 arranged in the vertical direction 34 behind the inlet opening 4.

[0076] The housing 3 is spiral-shaped. It has, in particular, a snail-shell shape.

[0077] The housing 3, in particular, has a round outer contour. This allows flow dead zones in the flow channel 6 to be avoided. In other words, the flow channel 6 is designed to be free of dead zones. It is designed to be free of dead zones, in particular, in a spiral-shaped inner region. An outlet region 13 adjoins the spiral-shaped inner region downstream. The outlet region 13 will be described in more detail below.

[0078] Due to the expanding flow cross-section of the flow channel 6, the housing 3 has a round, but not circular, outer contour. According to a preferred embodiment, the housing 3 has a total width B of 37 cm. However, the distance B1 of the rotational axis 12 of the fan motor 7 from the nearer outer boundary of the housing 3 is less than 16 cm.

[0079] The housing 3 thus has, in particular, a round outer contour with a radius of curvature that continuously increases in the direction of flow. The radius of curvature of the outer contour continuously increases, in particular, over a circumferential range of approximately 270°. The outer contour, in particular the pitch of the spiral geometry, is designed to open in particular in the range of 0.5° to 5°. Only in an outlet area 13 does the outer contour of the housing 3 deviate from the round shape.

[0080] The outer wall of the outlet area 13 can taper slightly inwards towards its free end, i.e. in the flow direction 8, towards the outlet opening 5. In particular, it can be slightly conical. This facilitates the connection of an outlet duct 48 to the fan module 1. This is shown as an example in the Fig. 5. The outlet area 13 thus forms a connection piece.

[0081] To connect the outlet duct 48, in particular to seal the outlet duct 48, a sealing strip can be arranged circumferentially around the outlet opening 5. The sealing strip is made, in particular, of foam. It is preferably self-adhesive on one side. This facilitates the sealed connection of the outlet duct 48 to the fan module 1.

[0082] A sound-damping element 40 is arranged along the peripheral outer wall of the housing 3. The sound-damping element 40 is arranged, in particular, in a guide groove 52 in the lower housing part 9 and / or the upper housing part 10.

[0083] The sound-insulating element 40 comprises a strip-shaped layer of foam. The foam layer is provided with a coating, in particular a fire-retardant and / or grease- and / or water-repellent coating, on its side facing the flow channel 6, i.e., the side facing the interior of the housing 3. It can, in particular, be provided with an aluminum coating. The aluminum coating can also be formed by an aluminum foil.

[0084] The sound-insulating element 40 comprises, in particular, a layer on a porous material and / or a fibrous material.

[0085] Such materials result in particularly effective sound insulation. The porous material can, in particular, be a material with open and / or continuous pores. The sound-insulating element 40 can, in particular, comprise at least one layer of a foamed or woven material.

[0086] It can have a single such layer. It can also have several corresponding layers. In particular, it can have several different layers. This allows sound insulation across a wide frequency spectrum to be achieved.

[0087] The sound-insulating element 40 comprises in particular at least one layer of foam.

[0088] The sound-insulating element 40 can, in particular, be provided with a fire-retardant coating. The coating can, in particular, be foil-like. An aluminum coating, in particular an aluminum foil, can serve as the coating.

[0089] The sound-insulating element 40 can be encapsulated in an airtight, particularly moisture-tight manner. This facilitates cleaning of the sound-insulating element 40.

[0090] The sound-insulating element 40 can be designed as a strip-shaped mat. It is particularly made of a flexible material. It can thus adapt to the contour of the housing of the fan module. The sound-insulating element 40 can also be made of a rigid, particularly dimensionally stable material. In principle, the sound-insulating element 40 can also be integrated into the housing of the fan module. It can, in particular, be formed as a single piece with the lower housing part or the upper housing part, or it can be firmly connected to one of these.

[0091] The sound-insulating element 40 is designed as a continuous unit. It can also be designed in multiple parts, in particular comprising several sub-elements. In this case, the sub-elements of the sound-insulating element 40 are preferably arranged adjacent to one another, overlapping, or fanned out in the housing of the fan module 1.

[0092] The sound-insulating element 40 has, in particular, a height that substantially corresponds to the free height of the flow channel. The sound-insulating element 40 has a thickness in the range from 3 mm to 3 cm, in particular in the range from 5 mm to 1.5 cm, in particular in the range from 7 mm to 1.2 cm. The sound-insulating element 40 has a length of at least 30 cm, in particular at least 50 cm, in particular at least 70 cm. The sound-insulating element 40 has, in particular, a length that is adapted to the dimensions of the housing of the fan module such that, when arranged along a radial outer wall of the housing, it extends over an angular range of at least 180°, in particular at least 225°, in particular at least 270°.

[0093] The sound-insulating element 40 is arranged in particular on the inside of the outer wall of the flow channel, i.e. in the flow channel.

[0094] The sound-insulating element 40 rests in the region of its outlet-side end against a contact shoulder 50 formed in the housing 3. It protrudes slightly inward radially beyond the contact shoulder 50. In particular, it protrudes up to 2 mm inward radially beyond the contact shoulder 50. A slight projection 51 of the sound-insulating element 40 beyond the contact shoulder 50 ensures that liquid or grease condensing on the inside of the sound-insulating element 40 does not reach the contact shoulder 50 and from there into the guide groove, where it accumulates.

[0095] The sound-insulating element 40 has a continuous surface, particularly on its inner side, i.e., on the side facing the flow channel. Thus, it does not impair the flow conditions in the flow channel, in particular, it does not lead to turbulence and / or dead zones in the flow channel.

[0096] The housing 3 can be made of plastic, in particular a fire-resistant plastic. It is preferably made of a reinforced plastic. Glass fibers, textile fibers, carbon fibers, talc, or other additives can serve as reinforcement. This allows for a particularly lightweight yet robust housing 3. The housing 3 is made of such a plastic, meaning it is completely and exclusively made of such a plastic. In principle, a metal housing 3 is also possible.

[0097] Constructing the housing 3 from plastic also facilitates the production of the housing. The housing 3 can, in particular, be designed as an injection-molded part. Different materials and / or different compositions can be used as needed. The properties of the housing can thus be easily influenced as desired. Constructing the housing 3 as an injection-molded part also increases the cost-effectiveness of production. It enables consistently high quality and dimensional accuracy of the housing. Furthermore, it opens up greater design flexibility.

[0098] The housing 3 can be constructed in multiple parts, in particular in two parts. In particular, it can have a lower housing part 9 and a higher housing part 10. To open the housing 3, the higher housing part 10 can be removed from the lower housing part 9. The lower housing part 9 and the higher housing part 10 are connected to one another by means of a plurality of fastening means. The fastening means can be retaining clips 11, screws, clips, rivets, locks, rails, springs, clasps, grooves, split pins, pins, spring grooves, etc. Alternatively, the lower housing part 9 and the higher housing part 10 can be connected to one another in a latchable manner. They can also be screwed together. In principle, a one-piece construction of the housing 3 is also conceivable.

[0099] Reinforcing ribs 14 are provided on the base 9 of the housing 3. They serve to mechanically reinforce the base 9. In the area where the housing 3 has a round outer contour, the reinforcing ribs 14 are linear. They run radially to the rotational axis 12. In the outlet area 13, the reinforcing ribs 14 have an angled shape. In the outlet area 13, they comprise, in particular, a first section running radially to the rotational axis 12 and a second section running perpendicular to the outlet opening 5. This can improve, in particular, the mechanical load-bearing capacity, in particular the rigidity, of the outlet area 13.

[0100] The flow channel 6 is defined on its inner side by an impeller of the fan motor 7, also referred to as the fan wheel 53. The fan wheel 53 has, in particular, a forward-curved design. In principle, a backward-curved design of the fan wheel 53 is also possible.

[0101] The inner contour of the flow channel 6 thus has a circular cross-section. The impeller of the fan motor 7 has an inner cross-section that essentially corresponds to the free diameter of the inlet opening 4. The free diameter of the inlet opening 4 is in particular in the range of 8 cm to 20 cm, in particular in the range of 12 cm to 18 cm, in particular at least 14 cm.

[0102] A connection piece 15 is provided in the area of ​​the inlet opening 4. The connection piece 15 is removably connected to the housing 3, in particular to its upper housing section 10. To connect the connection piece 15 to the housing 3, a bayonet lock, in particular a bayonet screw connection, or an alternative locking lock, in particular by means of pins, lugs, heads, a thread, a groove, rails, or guides, is provided. The connection piece 15 is, in particular, connectable to the housing 3 in a latchable, in particular lockable, manner.

[0103] As particularly in the Fig. 4, the connecting piece 15 has a flat, annular support area 16. The support area 16 has a slightly concavely curved cross-section. In particular, it has a prestress. This makes it possible to achieve a prestressed locking of the connecting piece 15 on the housing 3. The support area 16 has a radial extent c in the range from 5 mm to 5 cm, in particular in the range from 1.5 cm to 2.5 cm. On the one hand, it serves to provide a positive, in particular airtight, connection between the connecting piece 15 and the upper housing part 10 of the housing 3, and on the other hand, the radial rigidity of the connecting piece 15 is increased by the support area 16.

[0104] The connection piece 15 improves the axial load-bearing capacity of the housing 3, in particular of the upper housing part 10.

[0105] In the area of ​​the support area 16, additional stiffening elements, in particular stiffening ribs, can be provided. Fig. 1 and Fig. 4 shows two circular, concentrically arranged stiffening ribs 17 as an example. In addition, the Fig. 1 and Fig. 4 illustrates exemplary radially extending, fin-like webs 18. In the embodiment shown in the figures, six equidistantly arranged webs 18 are provided. The webs 18 can serve as a gripping aid. They facilitate the rotation of the connection piece 15 for locking or unlocking it with the housing 3.

[0106] For each of the webs 18, a marking 21 is provided on the upper housing section 10 of the housing 3, which indicates the orientation of the respective stiffening web 18 in the securely locked end position of the connecting piece 15. With the help of the webs 18 and the markings 21, it is easy to determine whether and when the connecting piece 15 has reached its prescribed end position when attached to the housing 3. To attach the connecting piece 15, it is placed in a first angular position on the upper housing section 10 of the housing 3. Mushroom-shaped or lens-head-shaped locking means engage with matching receiving slots in the upper housing section 10. Starting from this position, it is locked to the housing 3 by rotating it about the rotation axis 12 relative to the latter.On the underside of the upper housing section 10 of the housing 3, beveled ribs or webs are arranged, which engage with the mushroom-shaped locking elements of the connecting piece 15 when the latter is locked, causing the latter to be pressed against the inlet opening 4. Furthermore, preferably spring-loaded locking elements are provided, which engage with the locking elements when the latter is locked and securely hold the connecting piece 15 in the end position. The spring-loaded locking elements indicate the reaching of the end position both haptically and acoustically. Upon reaching the end position, a clicking sound is particularly noticeable.

[0107] The connecting piece 15 also has an edge portion 19 projecting into the inlet opening 4. The edge portion 19 is, in particular, hollow-cylindrical in shape. It has, in particular, a circular outer cross-section. It has, in particular, a circular inner cross-section. It can also be slightly conical in shape. In particular, it can have an outer cross-section that tapers slightly toward its free end 20. This can facilitate the insertion of the connecting piece 15 into the inlet opening 4. The connecting piece 15 forms, in particular, an inlet nozzle.

[0108] The connecting piece 15 has a tapered shape, at least in sections. In particular, it has a cross-section that decreases in sections. This cross-section is, in particular, the outer cross-section of the connecting piece 15. The cross-section of the connecting piece 15 decreases in particular toward its free end 22, i.e., opposite to an inflow direction 23.

[0109] The connecting piece 15 can in particular have several tapered sections.

[0110] The connecting piece 15 tapers continuously, particularly conically, or in a stepped manner. Combinations are also possible. The connecting piece 15 can also have sections with a constant outer diameter. A corresponding section is shown in the Fig. 4 is identified by reference number 24.

[0111] The connecting piece 15 may also have one or more stop shoulders 25.

[0112] According to a particularly advantageous embodiment, the connecting piece 15 has a single-conical or double-conical shape. In particular, it has two or more conically tapered sections.

[0113] Such a design of the free end 22 of the connection piece 15 considerably simplifies the connection of a ventilation pipe to the connection piece 15 and thus to the fan module 1.

[0114] The connecting piece 15 can also have a slightly widening shape in the area of ​​the free end 22, particularly in the form of a circumferential bead. This can improve the secure fit of a ventilation hose or corresponding ventilation pipe to be attached to the connecting piece 15.

[0115] The connecting piece 15 also has a grid-like structure 26 in the area of ​​its free end 22. The grid-like structure 26 comprises six radially extending struts 27. The grid-like structure 26 also includes circular struts 28 that enable optimized airflow. The circular struts 28 lead, in particular, to an improved noise level.

[0116] The grid-like structure 26 prevents foreign bodies above a certain size from entering the fan module 1. The grid-like structure 26 also increases the radial rigidity of the connection piece 15.

[0117] The edge section 19 has an extension in the direction parallel to the inflow direction 23 in the range of 0.3 cm to 2 cm, in particular in the range of 0.5 cm to 1.5 cm. The connection nozzle 15 has a total extension in the direction parallel to the inflow direction in the range of 5 mm to 10 cm, in particular in the range of 3 cm to 6 cm. The connection nozzle 15 can in particular have an outer contour which is adapted to a specific connection hose or to a ventilation duct or to a ventilation pipe. It is in particular possible to provide different connection nozzles 15 for different connection hoses or connection pipes. This further improves the flexibility and thus the possible uses of the fan module 1. In particular, different, interchangeable connection nozzles 15, in particular connection nozzles 15 with different outer diameters, can be provided.The fan module 1 can therefore be used universally with different extractor hood devices 2.

[0118] A sealing tape is provided for the sealed connection of a ventilation pipe, ventilation duct, or ventilation hose to the connection socket 15. The sealing tape is arranged, in particular, on the outer contour of the connection socket 15. It is made, in particular, of a compressible material, in particular of foam, in particular of a closed-cell foam. It is, in particular, compressible. It is provided, in particular, with a self-adhesive layer on its side facing the connection socket 15.

[0119] Information panels 29 may be provided on the lower housing section 9 and / or the upper housing section 10. These panels 29 may contain, in particular, manufacturer's instructions and / or instructions regarding operating requirements and / or safety instructions.

[0120] Apart from the connection nozzle 15, the housing 3 has a substantially flat surface in the area of ​​the housing upper part 10. In the outlet area 13, the free height of the housing 3 can be slightly reduced in the flow direction 8. This can facilitate the connection of an exhaust air duct, which adjoins the outlet opening 5 in the flow direction 8, to the fan module 1.

[0121] The outlet opening 5 has a flat channel-like cross-section. In particular, it has a substantially rectangular cross-section, in particular with rounded corners. The curves can, for example, have a radius of curvature of 20 mm. The outlet opening 5 has a free height h of slightly less than 10 cm, in particular slightly less than 9 cm. The outlet opening 5 has a free width w of less than 30 cm, in particular of approximately 22 cm. The outlet opening 5 has, in particular, a flow cross-section of approximately 200 cm. 2In general, the flow cross-section of the outlet opening 5 is at least 50 cm 2 , in particular at least 100 cm 2 , in particular at least 150 cm 2 , in particular at least 175 cm 2 , preferably at least 190 cm 2 , preferably at least 200 cm 2 . The flow cross-section of the outlet opening 5 is usually less than 500 cm 2 , especially smaller than 300 cm 2 , especially smaller than 250 cm 2 . In principle, however, it can also be larger.

[0122] A flow guide element 30 is arranged in the region of the outlet opening 5. The flow guide element 30 is particularly plate-shaped. It extends from the flow channel 6 into the outlet region 13 in the direction of the outlet opening 5. In the interior of the housing 3, it forms a lateral boundary of the flow channel 6 over a region extending at least 2 cm, in particular at least 5 cm, but in particular at most 15 cm, in particular at most 10 cm in the flow direction 8. In the region adjoining this region on the outlet side, the extent of the flow guide element 30 decreases continuously in the direction of the height of the flow channel 6.

[0123] The flow guide element 30 is designed as a centrally or eccentrically arranged plate extending substantially perpendicular to the housing lower part 9 and / or the housing upper part 10. In an inner region, it has an extension perpendicular to the housing lower part 9, which extends over the entire height of the flow channel 6. In this region, it laterally delimits the flow channel 6. In a second region adjoining it on the outlet side, the extension decreases continuously in the direction perpendicular to the housing lower part 9.

[0124] The flow guide element 30 has a substantially rectangular or trapezoidal shape, particularly in the first, inner region. It has, in particular, the shape of a right-angled trapezoid. It has, in particular, a substantially triangular shape in the second, outer region.

[0125] Several feet 31 are provided on the lower housing section 9 of the housing 3. The number of feet 31 is, in particular, three or four. The feet 31 ensure the stability of the housing 3. They can have an adjustable height. In particular, they can be adjustable.

[0126] The feet 31 have a support surface of maximum 10 cm at their free end 32 2 , in particular no more than 5 cm 2 , in particular no more than 3 cm 2 , in particular no more than 2 cm 2 , in particular no more than 1 cm 2 , in particular no more than 0.5 cm 2 , in particular not more than 0.2 cm 2 , in particular not more than 0.1 cm 2 Such a small footprint of the feet 31 improves the noise decoupling of the fan module 1 from the floor below.

[0127] Due to the small surface area of ​​the feet 31, it can be ensured that the fan module 1, despite its low weight, stands on the floor below with a surface pressure of at least 5000 Pa, in particular at least 10000 Pa, in particular at least 30000 Pa, in particular at least 50000 Pa, in particular at least 100000 Pa, in particular at least 150000 Pa.

[0128] The feet 31 can each be provided with an end cap 33 in the area of ​​their free end 32. The end cap 33 is preferably made of a somewhat elastic and / or dampening material, in particular rubber. This also reduces sound transmission from the fan module 1 to the floor below. As a result, the feet 31 contribute significantly to noise reduction. Furthermore, the feet 31 enable the fan module 1 to be securely placed on different floor coverings. In particular, they can effectively prevent the fan module 1 from slipping or moving.

[0129] The free ends 32 of the feet 31 are in the vertical direction 34, as can be seen from the Fig. 3 or 6, respectively, by a maximum of 10 mm, in particular a maximum of 5 mm, in particular a maximum of 3 mm, preferably a maximum of 2 mm, beyond the region 35 of the fan module 1 that projects furthest in the vertical direction 34. The region 35 is formed in particular by a base plate of the fan motor 7.

[0130] To facilitate the arrangement of the fan module 1 below a floor, fastening eyes 36 are provided as suspensions. In particular, at least three or four such fastening eyes 36 are provided. The fastening eyes 36 preferably have an inner diameter of 6 mm, 8 mm, 10 mm or 12 mm. Other inner diameters are also possible. The fastening eyes 36 are preferably formed integrally with the lower housing section 9 of the housing 3. This ensures a secure arrangement of the housing 3, in particular the fan module 1, on a floor. The fastening eyes 36 are preferably arranged on the housing 3 in such a way that the center of gravity of the polygon defined by them is aligned in the vertical direction 34 with the center of gravity of the fan module 1.

[0131] On the outside of the housing 3, a tab 37 is provided for attaching the connection and / or control cable(s) 38, 39 of the fan motor 7. This facilitates clear, orderly cable routing, especially when the fan module 1 is suspended.

[0132] To control the fan motor 7, a separate control line in the form of the control cable 39 is provided. The fan motor 7 is thus connected to a power source, in particular the national power grid, via the connecting cable 38, which is also referred to as a power cable or power line.

[0133] The fan module 1 is connected to a control device (not shown in the figures) via the control cable 39. A pulse width modulation (PWM) method is provided to control the fan motor 7, in particular to control the speed of the fan motor 7, and thus to control the suction power of the fan module 1, in particular to control the volume flow that can be generated by the fan module 1.

[0134] The fan motor 7 is preferably an EC motor (electronically commutated motor). Other motors are also possible.

[0135] The sound-insulating element 40 is arranged in a guide groove in the housing 3. It is preferably provided to form a corresponding guide groove in both the lower housing part 9 and the upper housing part 10. The sound-insulating element 40 extends in the vertical direction 34, in particular over the entire internal height of the flow channel 6. It is thus securely held by the guide grooves, in particular in the radial and axial directions.

[0136] At its outlet-side end, the sound-insulating element 40 rests against a bearing shoulder 50 of the housing 3. It projects radially inwardly by up to 2 mm, preferably by a maximum of 1 mm, beyond the bearing shoulder 50.

[0137] The sound-insulating element 40 is integrated into the housing 3. It is arranged, in particular, in the flow channel 6. It is preferably replaceable. The sound-insulating element 40 can be removed from the housing 3, for example, for cleaning purposes.

[0138] In the following, with reference to the Fig. 9 describes the intended use of the fan module 1. The fan module 1 forms a component of the extractor device 2. The extractor device 2 can, in particular, be a so-called downdraft system, i.e., an extractor that draws vapor downwards from a cooking surface level 41. The extractor device 2 can, in particular, be a cooking surface extraction system. The extractor device 2 comprises a vapor inlet device 42. The vapor inlet device 42 can be arranged adjacent to a cooking surface 43. It is, in particular, arranged between two cooking surfaces 43.

[0139] The extractor device 2 can be integrated into a cooktop system 44 with at least one, in particular a plurality of cooktops 43. It is particularly possible to combine the vapor inlet device 42 with one or more cooktops 43 to form an integrated, in particular a monolithic system. The cooktops 43 and the vapor inlet device 42 can, in particular, be combined to form a single assembly unit. This simplifies, among other things, the installation of the cooktop system 44. Furthermore, this ensures an advantageous arrangement of the extractor device 2, in particular the vapor inlet device 42, relative to the cooktops 43. Last but not least, an integrated design of the cooktop system 44 leads to design advantages.

[0140] The vapor inlet device 42 is fluidically connected to the fan module 1 via a connecting element 54. The connecting element 54 can comprise one or more pipes, ducts, or hoses. It can, in particular, be routed along base cabinet elements 45. The base cabinet element 45 can, in particular, comprise drawers 46.

[0141] The connecting element 54 is connected to the fan module 1 via the connecting piece 15. The connecting piece 15 is particularly adapted to the design of the connecting element 54.

[0142] The fan module 1 can be arranged in the base area 47 of the base cabinet elements 45.

[0143] The fan module 1 is fluidically connected on the outlet side to a duct-, pipe-, or hose-like outlet element 48. The outlet element 48 is connected at its end to an outlet unit 49. The outlet unit 49 can be a recirculation unit or an exhaust unit. A combined recirculation / exhaust unit is also possible.

[0144] The fan module 1 enables a flow volume of more than 500 m 3 / h, especially more than 600 m 3 / h, especially more than 650 m 3 / h, especially up to 660 m 3 / h.

[0145] In conjunction with the cooktop system 44, the sound power level was less than 70 dB (A). The sound power level was approximately 67 dB (A). The sound pressure level was less than 60 dB (A), and in particular less than 55 dB (A). It was approximately 54 dB (A).

Claims

[1] Hob system (44) with 1.1 at least one hob (43) and 1.2 at least one extractor device (2) with a fan module (1), 1.3 wherein the extractor device (2) is designed in the form of a downdraft system, 1.4 where the fan module (1) 1.4.1 a housing (3) with 1.4.1.1 an inlet opening (4), 1.4.1.

2. an outlet opening (5) and 1.4.1.

3. a flow channel (6) for the fluid-mechanical connection of the inlet opening (4) with the outlet opening (5) with a spiral-shaped inner region and an outlet region (13) adjoining it downstream, 1.

5. wherein the flow channel (6) has a cross-section widening in the direction of flow, 1.

6. wherein a sound-insulating element (40) is arranged in the housing (3), and 1.

7. wherein the fan module (1) has a total height (h) of not more than 10 cm. [2] Hob system (44) according to claim 1, characterized by that in the area of ​​the inlet opening (4) of the fan module (1) and / or in the area of ​​the outlet opening (5) of the fan module (1) a connecting piece (15) is provided with a shape that tapers at least in sections towards its free end. [3] Hob system (44) according to one of claims 1 to 2, characterized by that in the area of ​​the inlet opening (4) of the fan module (1) a connection piece (15) is provided, which is removably fastened to the housing (3) of the fan module (1) by means of a locking closure. [4] Hob system (44) according to one of the preceding claims, characterized by that at least one flow guide element (30) is provided in the area of ​​the outlet opening (5) of the fan module (1). [5] Hob system (44) according to one of the preceding claims, characterized by that several feet (31) and / or fastening elements (36) are provided on an outer side of the housing (3) of the fan module (1). [6] Hob system (44) according to one of the preceding claims, characterized by that the sound-insulating element (40) is arranged along a peripheral outer wall of the housing (3). [7] Hob system (44) according to one of the preceding claims, characterized by that the sound-insulating element (40) is arranged along an outer wall of the flow channel (6). [8] Hob system (44) according to one of the preceding claims, characterized by that the sound-insulating element (40) is arranged in the flow channel (6). [9] Hob system (44) according to one of the preceding claims, characterized bythat the sound-insulating element (40) is arranged in the housing (3) in an exchangeable manner so that it can be removed from the housing (3). [10] Hob system (44) according to one of the preceding claims, characterized by that the sound-insulating element (40) is formed coherently. [11] Hob system (44) according to one of the preceding claims, characterized by that the sound-insulating element (40) extends vertically over the entire internal height of the flow channel (6). [12] Hob system (44) according to one of the preceding claims, characterized by that the sound-insulating element (40) has a layer of porous material and / or fibrous material. [13] Hob system (44) according to one of the preceding claims, characterized by that the sound-insulating element (40) has at least one layer of foamed or woven material. [14] Hob system (44) according to one of the preceding claims, characterized by that the sound-insulating element (40) comprises at least one layer of foam. [15] Hob system (44) according to one of the preceding claims, characterized by that the sound-insulating element (40) comprises at least one layer of foam and the foam layer is provided with a coating, in particular a fire-retardant and / or grease- and / or water-repellent coating.

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