Device for extracting smoke, method for extracting smoke using the device, and use of the device for extracting smoke

Abstract

The present invention relates to an apparatus for extracting smoke, comprising an intake housing and a fan, wherein the intake housing comprises an air intake structure, wherein the air intake structure has an upper wall portion and a lower wall portion, wherein the upper wall portion and the lower wall portion form an inner space with an intake opening, wherein at least the upper wall portion has a wave shape on the inner side, wherein the wave shape has at least two upwardly protruding face segments, wherein the inner space has a widened portion at least in the region of the upwardly protruding face segments.

Description

Technical Field

[0001] The invention relates to a device for extracting smoke, comprising a suction housing and a fan, to a method for extracting smoke above a cooking zone by means of the device, and to the use of the device for extracting smoke above a cooking zone. Background Art

[0002] Devices for extracting smoke are well known and are usually designed as cooker hoods. Thus, for example, DE 102017 131 168 A1 describes a cooker hood having an extraction fan held in a frame, an intake opening, an air guide channel between the intake opening and the extraction fan, and a guide surface arranged obliquely to the horizontal above the cooking zone, in which the intake opening is formed.

[0003] DE 103 14 410 A1 discloses a range hood having a housing with a slot-shaped air inlet, wherein the housing has a convex upper housing section and a lower housing section pointing toward a cleaning flap on the housing underside.

[0004] DE 10 2009 028 808 A1 discloses a range hood having an inner frame and an inspection hood which is designed to be detachable from a basic structure.

[0005] EP 3 220 060 A1 discloses a range hood device in which a fan housing is rotatably fastened to a range hood housing by means of an elongated hole.

[0006] DE 202 18 265 U1 discloses a combined range hood extractor and cleaning machine.

[0007] A disadvantage of the range hoods known from the prior art is that they are fixedly installed at one location, in particular directly above the cooking area, in order to collect the rising smoke. For example, in restaurants, mobile kitchens and food trucks and at cooking locations where there are no walls or ceilings on which such range hoods can be installed, the smoke cannot be discharged. Furthermore, fixedly installed smoke extraction devices do not offer the possibility of movement or cannot be used flexibly in different cooking situations. Summary of the invention

[0008] The object of the present invention is to provide a device for extracting smoke which avoids the disadvantages known from the prior art. In particular, the object of the present invention is to provide a mobile device for extracting smoke.

[0009] According to the present invention, this object is achieved by means of a device for extracting smoke, which comprises an intake housing and a fan, wherein the fan is particularly arranged in the fan housing, wherein the intake housing comprises an air inlet structure, wherein the air inlet structure has an upper wall portion and a lower wall portion, wherein the upper wall portion and the lower wall portion form an interior space with an inlet opening, and wherein the air inlet structure has a horizontal opening angle, wherein the horizontal opening angle is the angle in a horizontal sectional view of the air inlet structure, the edges of the horizontal opening angle abut against the lateral inner wall portion, wherein at least the upper wall portion has a wavy shape on the inner side, wherein the wavy shape has at least two upwardly protruding surface segments, wherein the interior space has a widening portion at least in the region of the upwardly protruding surface segments.

[0010] Alternatively or additionally, according to the invention, this object is achieved by means of a device for extracting smoke, comprising an intake housing and a fan, the fan being particularly arranged in the fan housing, wherein the intake housing comprises an air intake structure, wherein the air intake structure has an upper wall portion and a lower wall portion forming an intake opening, wherein a projection is associated with the intake opening.

[0011] Alternatively or additionally, this object is achieved according to the invention by means of an intake housing comprising an air inlet structure, wherein the air inlet structure has an upper wall portion and a lower wall portion which form an inlet opening, wherein a projection is associated with the inlet opening.

[0012] Furthermore, according to the invention, the object is achieved by a method for extracting fumes above a cooking zone by means of the device, wherein

[0013] - generating an air flow into a suction housing by means of a fan, said suction housing having an air inlet structure, wherein the air inlet structure has a horizontal opening angle,

[0014] - applying the air flow at least partially by means of at least the upper wall of the air inlet structure, said upper wall having a wave shape at least on the inner side, said wave shape having at least two upwardly convex surface sections,

[0015] The air flow is directed at least via an outflow opening of the air inlet structure into a fan, which is formed, for example, in the lower wall and which is arranged, in particular, in a fan housing.

[0016] Alternatively or additionally, according to the invention, this object is achieved by a method for extracting fumes above a cooking zone by means of the device, wherein

[0017] - generating an air flow into a suction housing with the aid of a fan, said suction housing having an air intake structure,

[0018] - the air flow before the air inlet structure is stabilized and / or directed by a projection extending in particular above the inlet opening of the suction housing,

[0019] - drawing an air flow through the inlet opening into the suction housing, and

[0020] The air flow is directed at least via an outflow opening of the air inlet structure into a fan, which is formed, for example, in the lower wall and which is arranged, in particular, in a fan housing.

[0021] Furthermore, according to the invention, the object is achieved by the use of a device for extracting fumes above a cooking area.

[0022] The alternative solutions according to the invention achieve the objects of the invention individually or in combination with one another.

[0023] In one embodiment, the device has at least one upper wall portion with a wave shape and no protrusions. In one embodiment, it is proposed that the device does not have an upper wall portion with a wave shape, but has protrusions. In one embodiment, it is proposed that the device has at least one upper wall portion, which has a wave shape and a protrusion.

[0024] In one embodiment of the method, it is proposed that the air flow is at least partially applied to at least the upper wall portion at least by means of an upper wall portion of the air inlet structure, but the air flow before the air inlet structure is not stabilized and / or oriented by means of a projection, wherein the upper wall portion has a wave shape at least on the inner side, wherein the projection extends in particular over an inlet opening of the suction housing. In one embodiment of the method, it is proposed that the air flow is not at least partially applied to at least the upper wall portion by means of an upper wall portion of the air inlet structure, but the air flow before the air inlet structure is stabilized and / or oriented by means of a projection, wherein the upper wall portion has a wave shape at least on the inner side, wherein the projection extends in particular over an inlet opening of the suction housing. In one embodiment of the method, it is proposed that the air flow is at least partially applied to at least the upper wall portion at least by means of an upper wall portion of the air inlet structure, and the air flow before the air inlet structure is additionally stabilized and / or oriented by means of a projection, wherein the upper wall portion has a wave shape at least on the inner side, wherein the projection extends in particular over an inlet opening of the suction housing.

[0025] The proposed device is in particular mobile, that is to say designed to be movable and freely positionable. Another advantage is that the device does not necessarily have to be arranged above the cooking zone, but can be arranged next to the cooking zone and still sufficiently draw the smoke into the device and in particular filter or dry it there. The device according to the invention can be used flexibly in particular at locations that usually have no or only a small amount of kitchen technology, such as bistros or food trucks, or in particular also in private or commercial kitchens that do not allow the installation of a range hood due to technical, financial and / or architectural equipment. In particular, the device can be used at various cooking locations, i.e., for example at a gas stove, at a grill, at an electric cooking zone and / or at other cooking locations.

[0026] In particular, it is proposed that the suction housing and the fan housing can be moved together and / or separately from each other. In particular, the weight is designed so that the fan housing and / or the suction housing is easy to carry, in particular for the device or for a part of the device, a weight of less than about 25 kg is set, more preferably a weight of less than about 10 kg is set, more preferably a weight between about 3 kg and about 10 kg is set, more preferably a weight of less than about 3 kg is set, more preferably a weight of less than about 1 kg is set. In particular, the suction housing weighs less than about 1 kg.

[0027] If the term "about" is used in conjunction with a numerical value or a numerical range in the context of the present invention, it should be understood as a tolerance range that is considered normal by a person skilled in the art, in particular, a tolerance range of ±20%, preferably a tolerance range of ±10%, and more preferably a tolerance range of ±5%.

[0028] In one embodiment it is provided that the device can be arranged on a movable and / or rollable chassis, such as a tea trolley, a serving trolley and / or a vehicle designed for the device.

[0029] In particular, the device can be used both indoors and outdoors.

[0030] In particular, the device has an upper side and a lower side and two sides, namely a front and a rear side. Preferably, the fan housing is associated with the lower side and the suction housing is associated with the upper side. In another embodiment, it is proposed that the fan housing is associated with the upper side and the suction housing is associated with the lower side. In the further description, it is assumed that the suction housing is arranged above the fan housing. However, the opposite design can always be provided.

[0031] In another embodiment, it is proposed that the intake housing has an operating element by means of which the device can be operated. The operating element preferably has at least one touch sensor and / or at least one button and / or at least one switch. In particular, the air flow entering the device can be controlled by means of the operating element. For example, at least one intensity of a fan arranged in the fan housing can be adjusted or controlled by means of the operating element.

[0032] The suction housing also preferably has a cover. The cover is preferably associated with at least the upper side of the suction housing, more preferably with the side of the suction housing, more preferably with the rear of the suction housing. In one embodiment, it is provided that the cover forms a projection. The projection is particularly associated with the front of the suction housing, which particularly has an access opening. In one embodiment, it is provided that the access opening is associated with the projection.

[0033] The advantage of the projection is that the inflowing air is stabilized before it flows through the inlet opening into the suction housing. Another advantage of the projection is that the inflowing air flow is directed. In particular, the direction of the air flow can be generated substantially from below and from the front by the projection. In addition, it is advantageously proposed that the projection substantially prohibits the air flow from entering the inlet opening from above. As a result, an air flow flowing into the inlet opening is obtained, which directly enters the device or into the suction housing or is guided from below into the suction housing.

[0034] The term "substantially" denotes a tolerance range which can be representative for a person skilled in the art in the field of cooking smoke extraction devices from an economic and technical point of view, so that the corresponding features themselves can still be recognized or realized. Thus, for example, "substantially from below and from the front" can be understood to mean that the air flow is directed onto the front side of the intake housing. The front side of the intake housing is defined in particular by the inlet opening. The air flow directed in this way passes through the inlet opening with a horizontal vector or with a vector that is angled with respect to the horizontal and directed upwards. The air flow directed in this way can also have a vector component from above, but this vector component is smaller than the horizontal and / or vector component from below.

[0035] In one embodiment, it is provided that at least one cover is associated with the upper side of the device and at least partially surrounds the air inlet structure, wherein at least one cover forms a projection. In another alternative embodiment, it is provided that the air inlet structure has a projection, which is in particular associated with the upper side of the suction housing. This means in particular that the projection is arranged at least above the air inlet structure or the air inlet opening.

[0036] Furthermore, it is proposed that the projection extends away from the air inlet structure or the air inlet opening on the upper side of the device and / or at least at the side of the device. In particular, the projection extends at the upper side and at the side of the suction housing. Thus, the air flow can be advantageously directed. Also preferably, the projection arranged at the side of the inlet opening or the suction housing has the advantage that a container that generates smoke, such as a frying pan, a grill, a wok or other cooking container, can be very precisely aligned. In particular, the efficiency of the smoke extraction is thereby optimized. In combination with the mobility and alignability of the device, the inlet opening can be accurately aligned to the cooking container that generates smoke on the cooking device.

[0037] In a further embodiment, it is proposed that the projection of the projection decreases from the upper side of the device via the air inlet structure in the direction of the lower side of the device. In particular, an angled design is provided, wherein the extension of the projection on the upper side preferably extends further from the inlet opening than on the lower side. The extension away from the inlet opening is smaller at the bottom than at the top, wherein the inflow direction of the air flow into the device is advantageously induced or directed from obliquely below. In particular, it is advantageous to at least partially influence the inflow direction because the device has a certain height, wherein the inlet opening may be located above the cooking vessel. Thus, cooking fumes can be sucked directly from the cooking vessel into the device by the directed air flow. In particular, the projection has an angle of about 60° to about 85°, preferably about 80°, at the side starting from the vertical. In one embodiment, it is proposed that no projection is provided below the inlet opening.

[0038] In another embodiment, the lower wall portion has an outflow opening. In particular, the outflow opening is arranged so that the air flow flows out of the air inlet structure with a deflection of about 70° to about 120° relative to the inflow direction, the air flow preferably flows out of the air inlet structure with a deflection of about 80° to about 100° relative to the inflow direction, and the air flow preferably flows out of the air inlet structure with a deflection of about 90° relative to the inflow direction. In another embodiment, it is proposed that the outflow opening is arranged so that the air flow cannot be deflected by means of the outflow opening or can only be deflected by about 0° to about 90°. In particular, it is proposed in one embodiment that the outflow opening is arranged in the rear wall portion.

[0039] In one design example, the device has an adapter plate. In particular, the intake housing has an adapter plate. In another embodiment, it is proposed that the adapter plate can be connected to a pipe connection, which is in particular aligned with the outflow opening of the lower wall. In another embodiment, the adapter plate has a pipe connection. It is particularly preferred that the adapter plate can be arranged at the lower wall or be formed in a uniform material with the lower wall. In another embodiment, it is proposed that the adapter plate includes a housing surrounding the intake housing.

[0040] In another embodiment, the suction housing is height-adjustable. In particular, the distance between the suction housing and the fan housing can be set. In addition, it is preferably proposed that the pipe joint can be inserted into the fan housing to different degrees, so that the suction housing can be positioned at different heights relative to the fan housing. In another embodiment, it is proposed that the pipe joint is in the shape of a telescope, so that the suction housing can be positioned at different heights relative to the fan housing.

[0041] In a further embodiment, it is proposed that the device has an inlet partition upstream of the inlet opening in the inlet direction. In particular, when the inlet partition is arranged directly before the inlet opening, the inlet partition determines the width of the inlet opening. The inlet partition is preferably designed vertically, so that the surface of the opening in the inlet partition has a surface normal perpendicular to the longitudinal axis. In a further embodiment, it is proposed that the inlet partition is arranged before the inlet opening at an angle to the longitudinal axis or the inlet opening, in particular before the inlet opening in a manner that matches the angle of the lateral projection. In one embodiment, the inlet partition can geometrically change the inlet opening, in particular reduce the inlet opening, if this appears reasonable.

[0042] According to the present invention, the device has an air inlet structure. According to the present invention, the inlet opening is formed by an upper wall portion and a lower wall portion. In one embodiment, the upper wall portion has an upper inlet edge and the lower wall portion has a lower inlet edge, and the inlet edges are preferably associated with the inlet openings, respectively. The upper inlet edge and / or the lower inlet edge preferably have a radius. In particular, the radius is about 5mm to about 15mm, preferably about 10mm. It is preferably proposed that the upper inlet edge and the lower inlet edge are adjacent to each other and thus define the inlet opening or the opening mouth. It is also preferably proposed that the upper inlet edge at least partially extends downward and / or the lower inlet edge at least partially extends upward. More preferably, the downward and / or upward extending sections of the inlet edge have a radius. The inlet opening is preferably constituted in a substantially rectangular or substantially elliptical shape. In an embodiment in which the upper and / or lower inlet edge has a radius, a particularly encircling line on the inlet edge substantially defines the inlet opening, the line having a tangent parallel to the vertical axis. More preferably, the upper inlet edge is constituted as a downwardly convex facial segment. More preferably, the lower inlet edge is constituted as an upwardly convex facial segment. More preferably, the upper inflow edge and / or the lower inflow edge is arranged in such a way that a widening is formed in the region of the inlet opening.

[0043] In one embodiment it is provided that the inflow edge at least partially extends into the inner space of the air inlet structure. More preferably, the inflow edge forms a part of the wave shape.

[0044] In one embodiment, the intake housing has an air inlet structure accommodation portion. Preferably, the air inlet structure can be inserted into the air inlet structure accommodation portion and more preferably can be locked in the air inlet structure accommodation portion, in particular releasably, by means of a locking element. In order to operate the locking element, the air inlet structure accommodation portion and / or the intake housing has an opening, by means of which the air inlet structure can be removed from the air inlet structure accommodation portion or can be unlocked, for example for cleaning. In one embodiment, the opening is covered with a flexible membrane, which advantageously simplifies the cleaning of the intake housing.

[0045] In one embodiment, the air inlet structure has a locking structure, which is preferably designed as a locking accommodating portion. In particular, it is proposed that the air inlet structure has an upper shell. It is also preferably proposed that the upper shell has a locking structure, in particular a locking accommodating portion. According to the present invention, the air inlet structure has at least an upper wall portion, and in one embodiment, the upper wall portion is at least partially surrounded or surrounded by the upper shell.

[0046] The locking element and the locking structure preferably form a snap connection. It is also preferred that the air inlet structure can be releasably or non-releasably connected to the air inlet structure receiving portion in a form-fitting manner by means of a bayonet connection. In particular, the locking element has at least one locking flange, which engages in the locking receiving portion of the locking structure. It is also preferred that the locking element deforms and snaps into the locking receiving portion when engaged. More preferably, the locking element can be deformed to disengage the locking element and the locking mechanism. In an alternative embodiment, it is proposed that the air inlet structure has a locking element and the air inlet structure receiving portion has a locking mechanism.

[0047] According to the invention, the wavy shape of the upper wall has at least two upwardly protruding face segments, which can be described in particular as concave. More preferably, the wavy shape has at least two downwardly protruding face segments, which can be described in particular as convex, wherein the convex face segments are also preferably arranged between the upwardly protruding face segments. In one embodiment, the wavy shape can be designed sinusoidally in a cross section. In another embodiment, the wavy shape can have upward and downward protrusions in an arbitrarily designed manner, which protrusions are particularly continuously connected to each other. In particular, the widening of the inner space is arranged in the region of the upward protrusions of the upper wall, and is also preferably formed by said region. This has the advantage that the air flow in the air inlet structure is applied at least to the upper wall, more preferably also to the lower wall.

[0048] In one embodiment, it is provided that at least one concave face segment has a radius between about 25 mm and about 150 mm, preferably a radius of about 50 mm to about 100 mm, more preferably a radius of about 50 mm, more preferably a radius of about 100 mm. In another embodiment, it is provided that the radius of the first concave face segment is different from the radius of the second concave face segment. Furthermore, it is provided in a preferred embodiment that the radius of the first concave face segment is smaller than the radius of the second concave face segment. In particular, the first concave face segment has a radius of about 50 mm and the second face segment has a radius of about 100 mm. Furthermore, it is provided in one embodiment that the radius of the first concave face segment is greater than the radius of the second concave face segment. In particular, the second concave face segment has a radius of about 50 mm and the first face segment has a radius of about 100 mm. Furthermore, it is provided in a preferred embodiment that the radius of the first concave face segment is approximately the same size as the radius of the second concave face segment. In particular, the two concave face segments have a radius of about 50 mm or about 100 mm.

[0049] By the applied flow, the interior space of the air inlet structure is optimally utilized, in particular in such a way that energy losses are avoided and thus energy can be saved or more efficient extraction of the smoke can be achieved. In addition, the widening produced by the wave shape also deflects the air flow more efficiently in the direction of the fan housing.

[0050] It is preferably proposed that at least the wave shape of the upper wall portion is configured such that the height of the interior space increases and decreases in the inflow direction. It is preferably proposed that the interior space has at least one first widening portion and a second widening portion. In particular, the first widening portion is associated immediately or shortly after the entry opening. More preferably, the first widening portion is arranged downstream of the upper and / or lower inflow edge in the inflow direction, and more preferably is arranged substantially immediately after the inflow edge. In particular, the inflow edge is at least part of a downwardly protruding face segment, which is connected to the upwardly protruding face segment.

[0051] Another embodiment provides that the second widening is associated with the outflow opening. In particular, the second widening is arranged substantially above the outflow opening, i.e. the wave shape is formed oriented upward above the outflow opening. In particular, at least the widening above the outflow opening starts from the surface of the wall defining the outflow opening and the apex of the wave shape is defined above the outflow opening.

[0052] The advantage of the described embodiment is that the losses caused by the deflection of the air flow into the outflow opening are reduced by the widening. Preferably, the wave shape of the housing or the widening, more preferably the multiple widening of the housing, reduces the losses during the subsequent deflection, in particular during a deflection of about 90° around the rotating fan. In addition, the wave shape of at least the upper wall leads to a better application of the air flow to the upper wall and / or to the lower wall, and thus more preferably a flow with lower losses than in the case of a straight-line design of the wall. In addition, advantageously, the smoke before the inlet opening can be detected more extensively.

[0053] According to the invention, the wave shape causes at least two widenings of the inner component. In another embodiment, it is provided that the wave shape causes 2, 3, 4 or more than 4 widenings of the inner space.

[0054] In another embodiment, it is proposed that the lower wall portion at least partially has a wavy shape. In one embodiment, the lower wall portion has at least one, preferably at least two, and more preferably at least three downwardly protruding facial segments, which can also be described as concave. In one embodiment, the lower wall portion has at least one, preferably at least two, and more preferably at least three upwardly protruding facial segments, which can also be described as convex. In particular, the wavy shape of the lower wall portion at least partially increases the widening portion of the internal space through the wavy shape of the upper wall portion or produces at least one widening portion at other locations. In particular, it is proposed that the upper wall portion and the lower wall portion have at least partially anti-parallel wavy shapes. In particular, this means that the upward undulation of the upper wall portion is substantially parallel to the downward undulation of the lower wall portion. In one embodiment, the anti-parallel wavy shape can also be understood as: the upward undulation of the upper wall portion is substantially parallel to the downward undulation of the lower wall portion, wherein the geometric implementation of the wavy undulation and / or the amplitude of the wavy undulation are different from each other.

[0055] In particular, the wave shape can be understood as the shape of a transverse wave in the inflow direction. It is also preferably proposed that the inner space is widened and narrowed by the wave shape in the inflow direction. In particular, the inner space is alternately widened and narrowed by the wave shape of at least the upper wall.

[0056] In particular, the flow in the upper region from above the cooking zone can be improved or the detection region can be enlarged by the design of the second widening, which is in particular associated with the outflow opening. In the embodiment with the projection, it is also provided that the flow at the projection is optimized.

[0057] In an exemplary embodiment, it is proposed that the first widening portion in the inflow direction is arranged before the lower inflow edge and the upper inflow edge in the area of ​​the entry opening. The narrowing portion caused by the downwardly protruding inflow edge is connected to the second widening portion in the flow direction, wherein the narrowing portion in particular forms a downwardly protruding first face section, and the second widening portion is formed by at least one upwardly protruding first face section of the upper wall portion. In particular, the upper wall portion has a downwardly protruding second face section, which is connected to the upwardly protruding first face section and produces a second narrowing portion of the inner space. More preferably, the upper wall portion has an upwardly protruding second face section, which is connected to the downwardly protruding second face section and produces an inner third widening portion. More preferably, the upper wall portion extends behind the third widening portion in the direction, for example, into the closed rear wall portion.

[0058] In another embodiment, it is proposed that the air inlet structure has a vertical opening angle. In particular, the first side of the vertical opening angle is tangent to at least two convex face segments and the second side is arranged horizontally. The vertical opening angle is preferably about 1° to about 5°, more preferably about 2° to about 4°, more preferably about 2°, more preferably about 4°. The vertical opening angle is preferably open upwards. In particular, it is proposed in one embodiment that the vertex of the convex first face segment is arranged higher than the vertex of the convex second face segment.

[0059] The present invention proposes that the air inlet structure has a horizontal opening angle, wherein the horizontal opening angle is an angle in a horizontal cross-sectional view of the air inlet structure, and the side of the horizontal opening angle is against the lateral inner wall portion. In one embodiment, it is proposed that the horizontal opening angle is about 30° to about 60°, preferably about 40° to about 55°, more preferably about 45° to about 50°, more preferably about 46° and about 50°, more preferably about 48°. Advantageously, the horizontal opening angle is designed to be optimized for mobile use of the device. The horizontal opening angle allows easy alignment of the air flow to be inhaled, high energy efficiency and large volume flow, making the device particularly suitable for placement next to a cooking place.

[0060] Furthermore, it is preferably provided that the upper wall portion and the lower wall portion form a closed rear wall opposite the inlet opening in the flow direction. It is also preferably provided that the constriction of the interior space of the air inlet structure is produced by the upper wall portion and / or the lower wall portion immediately before the closed rear wall. In one embodiment, the closed rear wall is a face section formed by the upper wall portion and the lower wall portion. The closed rear wall preferably has a face section that is convex to the rear. It is also preferably possible to guide the air flow to the outflow opening by means of the closed rear wall.

[0061] In the embodiment in which the wave shape is provided in combination with the projections, the advantage is obtained that the direction of the air flow is achieved during the extraction of the smoke as well as optimization and energy efficiency.

[0062] By expanding the inner space, the effective flow cross section in the air inlet structure is enlarged. As a result, a homogenization of the flow in the air inlet structure is achieved. In particular, this effect is enhanced by alternating widening and narrowing. This leads to a uniform and thus more favorable velocity distribution in the region of the inlet opening, and in one embodiment in the region of any projections, and in one embodiment in the region of the outflow opening of the suction housing, thereby reducing the overall pressure loss.

[0063] In a further embodiment, it is provided that the intake housing has a lower shell, which at least partially surrounds the lower wall. In a further embodiment, the lower shell and the upper shell can together form a housing, which at least partially surrounds the air inlet structure, preferably completely surrounds the air inlet structure. It is particularly preferred that the lower shell has an outflow opening, which is preferably aligned with the outflow opening of the lower wall.

[0064] According to the present invention, the device has a fan housing. In one embodiment, it is proposed that the suction housing is releasably connected to the fan housing. In particular, releasable can be understood as: the suction housing can be separated from the fan housing without tools. In another embodiment, it is proposed that the suction housing is non-releasably connected to the fan housing without tools. It is preferably proposed that the fan housing has a fan. In particular, the fan is configured as an axial fan, a radial fan or a cross-flow fan, wherein it is preferably configured as a radial fan. It is also advantageously proposed that the suction housing is releasably connected to the fan housing via an adapter plate. In another embodiment, it is proposed that the suction housing is rotatably connected to the fan housing. In another embodiment, the suction housing is tiltably connected to the fan housing. In particular, the suction housing can be tilted upward and / or downward relative to the fan housing. Advantageously, the alignment can therefore be directed, for example, to a cooking container that generates smoke. Directed to a cooking container.

[0065] The advantage of a rotatable connection between the intake housing and the fan housing is that the inlet opening can be easily aligned, wherein the intake housing can be rotated without having to rotate the entire device for this purpose, wherein the intake housing is preferably lighter than the fan housing.

[0066] In another embodiment, it is proposed that the fan housing has an air inlet opening. The air inlet opening is preferably arranged on the upper side of the fan housing. In one embodiment, it is proposed that the air inlet opening preferably at least partially accommodates the pipe connection. In one embodiment, the pipe connection can be part of an adapter plate. In another embodiment, it is proposed that the pipe connection is part of the air inlet opening or is arranged in the air inlet opening. It is also proposed that the adapter plate can be arranged on the pipe connection. The adapter plate or the fan housing and the suction housing can be connected via the pipe connection.

[0067] In another embodiment, it is proposed that the fan housing has at least one safety switch. It is preferably proposed that the safety switch is a proximity sensor, an inductive sensor, a button, a contact lock or other switch or button device that can be realized via a pipe joint, for example. In particular, it is proposed that the fan housing has a fan that can be switched on and off with the help of a safety switch. The advantage of providing at least one safety switch is that the fan stops or is turned off as long as the suction housing is removed from the fan housing. In particular, it is proposed in one embodiment that the safety switch is arranged in the area of ​​the suction opening. In another embodiment, it is proposed that the safety switch is arranged on the upper side of the fan housing or is associated with the upper side. In another embodiment, it is proposed that the safety switch can be switched on and off with the help of the suction housing and / or the pipe joint.

[0068] In another embodiment, the fan housing has an air exit opening. The fan housing has at least one air exit opening. The housing preferably has at least two air exit openings. It is also preferably proposed that the air exit opening is arranged at the side, at the rear and / or at the front. Preferably, the air exit opening is arranged at the side of the fan housing. In another embodiment, it is proposed that a filter is associated with the air exit opening, which filter filters the air flow.

[0069] The air flow is generated by a fan arranged in a fan housing. The fan sucks in air, which is introduced into the interior space of the suction housing through an inlet opening. If there is a protrusion, the air is directed and stabilized before flowing into the interior space. In the interior space, when the upper wall and / or the lower wall have a wave shape, the air flow is applied to the upper wall and / or the lower wall, and the wave shape has at least two protrusions, which widen the interior space respectively. Within the interior space, the air flow is deflected in the direction of the fan housing, especially downward by about 90°. The air flow flows into the fan housing through the outflow opening in the lower wall. In particular, the air flow flows into the fan housing through a pipe joint arranged at the adapter plate, and the pipe joint is at least partially inserted into the suction housing. The air flow passes through the fan and preferably passes through a filter arranged downstream of the fan. Then, the air flow leaves through the air exit opening at the fan housing.

[0070] In another embodiment, it is proposed that the fan housing has an electrical unit. The electrical unit is preferably arranged at the rear of the fan housing. In another embodiment, the electrical unit is arranged in the fan housing. The electrical unit particularly comprises a power supply, a control device and / or a regulating device of the fan.

[0071] In a first exemplary embodiment, it is proposed that a projection is associated with the inlet opening, which projection is formed, for example, by the cover. In particular, the projection projects above the inlet opening. It can also be seen that the projection extends further above the inlet opening than below the inlet opening. For example, it is proposed that no projection is provided below the inlet opening. The cover thus forms a projection around the inlet opening, which projection has an angle with respect to the horizontal. In a first exemplary embodiment, it is proposed that the upper wall portion or the lower wall portion does not have a wave shape.

[0072] In a second exemplary embodiment, it is proposed that at least the upper wall portion has a wave shape. The wave shape forms, for example, a first widening portion and a second widening portion within the air inlet structure. The first widening portion is preferably associated with the air inlet opening and widens the air inlet structure immediately after the inlet edge provided with a radius. An exemplary air flow flows into the air inlet structure through the inlet opening along the inlet direction and is applied to at least the upper wall portion by the wave shape. In addition, the air flow is directed away to the lower rear through the outflow opening. In a second exemplary embodiment, it is also proposed that the lower wall portion has the shape of a widening portion that strengthens the internal space. In particular, a groove is provided behind the lower inflow edge, which groove contributes to the formation of the widening portion. The lower wall portion forms an upwardly extending curling edge around the outflow opening and extends downwardly to the outflow opening within the curling edge. In a second exemplary embodiment, it is proposed that the device does not have a protrusion.

[0073] In the third exemplary embodiment, it is proposed that at least the upper wall has a wave shape. The wave shape forms, for example, a first widening portion and a second widening portion in the air inlet structure. The first widening portion is preferably associated with the air inlet opening and widens the air inlet structure immediately after the inflow edge provided with a radius. The exemplary air flow flows into the air inlet structure through the inlet opening in the inflow direction and is applied to at least the upper wall by the wave shape. In addition, the air flow is then directed away from the lower rear through the outflow opening. In the third exemplary embodiment, it is also proposed that the lower wall has the shape of a widening portion that strengthens the inner space. In particular, a groove is provided behind the lower inflow edge, which contributes to the formation of the widening portion. The lower wall forms an upwardly extending curling around the outflow opening and extends downward to the outflow opening in the curling. In the third exemplary embodiment, it is also proposed that the inlet opening is associated with a protrusion, which is formed, for example, by a cover. In particular, the protrusion protrudes above the inlet opening. It can also be known that the protrusion extends further above the inlet opening than below the inlet opening. For example, it is proposed that no protrusion is provided below the inlet opening. The cover thus forms a projection around the access opening, said projection being at an angle with respect to the horizontal.

[0074] What all exemplary embodiments have in common is that the device is provided with an intake housing and a fan housing. The intake housing comprises an air inlet structure. The device has an upper side and a lower side. In addition, the device comprises two side portions and a front portion and a rear portion. An air exit opening is provided at the side portion and the fan housing. The intake housing has an air inlet structure. The air inlet structure has an upper wall portion, which has an inflow edge. The lower wall portion is connected to the upper wall portion and forms an internal space with the upper wall portion, which is not further represented here. The lower inflow edge of the lower wall portion is adjacent to the upper inflow edge of the upper wall portion and forms a rounded rectangular inlet opening with the upper inflow edge. In addition, the lower wall portion has an outflow opening, through which an air flow can be introduced into the air inlet opening of the fan housing. The upper housing and the lower housing surround the air inlet structure. The lower housing has an outflow opening, which is aligned with the outflow opening of the lower wall portion and can guide the air flow through the outflow opening toward the direction of the fan housing.

[0075] In all exemplary embodiments, the intake housing also preferably has two covers arranged one above the other and an air inlet structure receiving portion, which surround and protect the air inlet structure. In exemplary embodiments, it is preferably proposed that at least one operating element is integrated into the intake housing, wherein at least one cover has an opening through which the at least one operating element can be operated. The air inlet structure receiving portion has at least one locking element, which cooperates with at least one locking receiving portion of the upper shell. In this way, the air inlet structure can be releasably inserted into the intake housing together with the upper shell and the lower shell. In particular, the releasability of the air inlet structure facilitates cleaning thereof.

[0076] An adapter plate is provided below the air inlet structure accommodation and the cover. In an exemplary embodiment, the pipe connection is preferably arranged below the adapter plate. When the air inlet structure is inserted into the air inlet structure accommodation, the pipe connection is preferably designed to be aligned with the outflow opening of the lower wall. The inlet baffle is placed in front of the air inlet structure or arranged in front of it, in order to further define the air inlet opening, in particular by the shape design of the inlet baffle opening.

[0077] In an exemplary embodiment, the air inlet structure has an upper wall and a lower wall. The upper wall has a wave shape on the inner side. In addition, the lower wall has an outflow opening, which is aligned with the pipe joint. The upper wall and the lower wall also have an inflow edge, which defines the inflow opening. The pipe joint is preferably part of an adapter plate and is fixed in the adapter plate. In another embodiment, the pipe joint can be removed from the adapter plate. The inflow edges each have a radius and are preferably not sharp. The pipe joint of the suction housing can be engaged in the air inlet opening, wherein at least one safety switch is operated by assembling the two housing parts together. At least one safety switch is preferably arranged in the wall section forming the air inlet opening. The fan and the electrical unit are also arranged in the fan housing.

[0078] In particular, the intake shell includes the air intake structure, wherein the air intake structure has an upper wall portion and a lower wall portion, wherein the upper wall portion and the lower wall portion form an interior space having an inlet opening, wherein at least the upper wall portion has a wave shape on the inner side, and the wave shape has at least two upwardly protruding face segments, wherein the interior space has a widened portion at least in the region of the upwardly protruding face segments and associates the protrusion with the inlet opening.

[0079] Furthermore, a method for extracting smoke from above a cooking zone by means of the above-mentioned device is proposed, wherein

[0080] - generating an air flow into an intake housing by means of a fan, the intake housing having an air intake structure, wherein the air intake structure has a horizontal opening angle,

[0081] - applying an air flow at least through the upper wall of the air inlet structure at least to the upper wall, said upper wall having a wave shape at least on the inner side,

[0082] - The air flow is directed into the fan housing at least via an outflow opening in the lower wall of the air inlet structure.

[0083] Alternatively or additionally, a method for extracting fumes above a cooking zone by means of the above-mentioned device is disclosed, wherein

[0084] - generating an air flow into a suction housing by means of a fan, said suction housing having an air intake structure,

[0085] - stabilization and / or orientation of the air flow upstream of the air inlet structure by means of a projection, wherein the projection extends in particular over an inlet opening of the intake housing,

[0086] - drawing an air flow into the suction housing through the inlet opening, and

[0087] The air flow is directed into the fan housing at least via an outflow opening in the lower wall of the air inlet structure.

[0088] In one embodiment, the method proposes: stabilizing and / or directing the air flow before the air inlet structure by means of a projection, and at least partially applying the air flow to at least the upper wall portion of the air inlet structure by means of at least an upper wall portion, wherein the upper wall portion has a wavy shape at least on the inner side, wherein the projection extends in particular at the inlet opening of the suction housing.

[0089] Furthermore, the use of the above-mentioned device for extracting fumes above a cooking area is disclosed. BRIEF DESCRIPTION OF THE DRAWINGS

[0090] Further advantageous embodiments can be derived from the following figures. However, the improved forms shown in the present disclosure should not be interpreted in a restrictive manner; on the contrary, the features described in the present disclosure can be combined with the above-mentioned features to form further embodiments. In addition, it should be pointed out that the reference numerals proposed in the description of the figures do not limit the scope of protection of the present invention, but only refer to the embodiments shown in the figures. The same parts or parts with the same function have the same reference numerals in the following text. The figures show:

[0091] Figure 1 An apparatus for extracting smoke is shown;

[0092] Figure 2 An exploded view showing an alternative device;

[0093] Figure 3 Show Figure 1 A cross-sectional view of the device in which the suction housing is separated from the fan housing;

[0094] Figure 4 Shown from Figure 3 Detailed view of the cross section;

[0095] Figure 5 A bottom view showing the air inlet structure;

[0096] Figure 6 Show according to Figure 2 A front view of the device;

[0097] Figure 7 Show according to Figure 6 a side view of one of the devices; and

[0098] Figure 8 Show according to Figure 6 A top view of the device. DETAILED DESCRIPTION

[0099] Figure 1The device 10 is shown, which has an intake housing 78 and a fan housing 20. The intake housing 78 comprises an air inlet structure 40. The device 10 has an upper side 16 and a lower side 17. Furthermore, the device comprises two sides 12, 13 as well as a front 14 and a rear 15. Air exit openings 24 are provided at the sides 12 and 13 of the fan housing 20.

[0100] In the embodiment shown here, the intake housing 78 also has at least one cover 82. The air inlet structure 40 and / or the air inlet structure receptacle (not visible here) has a locking element 84, which preferably at least partially surrounds the air inlet structure 40 and cooperates with the locking receptacle 44 of the cover 82. In this way, the air inlet structure 40 can be releasably inserted into the intake housing 78. In particular, the releasability of the air inlet structure 40 simplifies cleaning.

[0101] Figure 2 An exploded view of another embodiment of the device 10 is shown, wherein the individual components of the intake housing 78 are discussed in particular below. The intake housing 78 has an air inlet structure 40. The air inlet structure 40 has an upper wall portion 54, which has an inflow edge 56. A lower wall portion 62 is connected to the upper wall portion 54 and thereby forms a space not further specified in the interior space. The lower inflow edge 66 of the lower wall portion 62 is adjacent to the upper inflow edge 56 of the upper wall portion 54 and forms with the upper inflow edge a rounded rectangular inlet opening 72, which is located at Figure 3 In addition, the lower wall portion 62 has an outflow opening 64, Figure 4 The air flow 18 shown in FIG. 1 can be guided through the outflow opening into the air inlet opening 22 of the fan housing 20 .

[0102] In the embodiment shown here, the intake housing 78 also has a cover 82. In the embodiment shown here, it is preferably provided that an operating element 86 is integrated into the intake housing 78, wherein the cover 82 has an opening (not shown in any more detail here) through which the operating element 86 can be operated.

[0103] The adapter plate 88 is arranged below the air inlet structure receiving portion 80 and the cover 82. The inlet baffle 90 is placed before the air inlet structure 40 or arranged before it so as to further define the air inlet structure 40, especially by the shape of the inlet baffle opening 92. Figure 3 Inlet opening 72 is shown. In another embodiment, it is provided that the inlet baffle 90 only borders the air inlet structure 40 or that the inlet baffle 90 is omitted completely.

[0104] Figure 3 Show Figure 11 shows a longitudinal section of the device 10 in FIG. 1 , in which the suction housing 78 is separated from the fan housing 20. It can be seen that the inlet opening 72 is associated with a projection 83, which in the embodiment shown is formed by the cover 82. In particular, the projection 83 projects above the inlet opening 72 by approximately 23 mm. It can also be seen that the projection 83 extends further above the inlet opening 72 than below the inlet opening 72. It is particularly provided that no projection 83 is provided below the inlet opening 72. The cover 82 thus forms a projection 83 around the inlet opening 72, which forms an angle α of approximately 80° with the horizontal.

[0105] As described in the general description, the device 10 can also be designed without the projection 83 .

[0106] The air inlet structure 40 has an upper wall portion 54 and a lower wall portion 62. The upper wall portion 54 has a wave shape 59 on the inner side 60. In addition, the lower wall portion 62 has an outflow opening 64 aligned with the pipe joint 89. The upper wall portion 54 and the lower wall portion 62 also have inflow edges 56 and 58 defining an inflow opening 72. Figure 3 It can also be seen that the pipe connection 89 is part of the adapter plate 88 and is fixed therein. In another embodiment, the pipe connection 89 can be removed from the adapter plate 88. The inflow edges 56 and 66 each have a radius 58 and 68 and are preferably not sharp.

[0107] In addition, Figure 3 The fan housing 20 can be seen in the sectional view of FIG. 7 , in which it can be seen that the pipe connection 89 of the suction housing 78 can be inserted into the air inlet opening 22, wherein the safety switch 23 is actuated by the assembly of the two housing parts 78 and 20. The safety switch 23 is preferably arranged in a wall section (not shown) which forms the air inlet opening 22. In addition, a fan 96 and an electrical unit 98 are arranged in the fan housing 20.

[0108] Figure 4 Show according to Figure 1 5 , wherein it can be seen that the wave shape 59 of the upper wall portion 54 has at least two upwardly protruding face segments 75 and 77, which can be described in particular as concave. It is also preferred that the wave shape 59 has at least two downwardly protruding face segments 79 and 81, which can be described in particular as convex. The upwardly protruding face segments 75 and 77 produce a first widening 61 and a second widening 63 in the interior space 57 of the air inlet structure 40. Preferably, the first widening 61 is associated with the air inlet opening 72 and widens the air inlet structure 40 directly behind the inflow edges 56 and 66 provided with the radii 58 and 68.

[0109] The opening angle β is approximately 2°, the upper side of which is tangential to the apex of the downwardly protruding surface sections 79 and 81 and the lower side of which extends horizontally or in the inflow direction 91 .

[0110] from Figure 4 , an exemplary air flow 18 can also be seen, which flows into the air inlet structure 40 through the inlet opening 72 in the inlet direction 91 and is applied at least to the upper wall by the wave shape 59. It can also be seen that the air flow 18 is then guided away downwards through the outlet opening 64.

[0111] Figure 4 It is also shown that the lower wall 62 has a shape that reinforces the widenings 61 and 63 of the inner space 57. The lower wall 62 therefore has two downwardly protruding face sections 85 and 87, which can also be described as concave. In addition, the lower wall 62 has two upwardly protruding face sections 93 and 95, which can also be described as convex. The inflow edges 56 and 66 are formed by the convex face sections 79 and 93. By means of this shape, a mouth opening open to the outside is formed. In particular, a downwardly protruding face section 85 is provided behind the lower inflow edge 66, which together form the widening 61. The lower wall 62 forms an upwardly extending curling 65 around the outflow opening 64 in an annular manner, which is formed by the upwardly protruding face section 95 and extends downwardly within the curling 65 to the outflow opening 64.

[0112] In an embodiment not shown here, the wave shape 59 of the air inlet structure 40 is designed only without the projection 83, which can be Figure 3 Furthermore, in another embodiment it is proposed that the device is formed with only one projection 83 and that there is no wave shape 59 in the air inlet structure 40 .

[0113] Figure 5 Shown below according to Figure 1 The horizontal opening angle γ has an edge which abuts against the lateral inner wall section formed by the upper wall section 54 and / or the lower wall section 62. This angle is approximately 48° and is therefore optimally designed for mobile use of the device 10.

[0114] Figure 6 Show according to Figure 2 A front view of the device 10 of an alternative embodiment of FIG. 7 is shown. The suction housing 78 and the fan housing 20 with the air inlet structure 40 are shown, and the fan housing is arranged below the suction housing 78 .

[0115] Figure 7 Show according to Figure 21. A side view of the device 10 of an embodiment of the present invention. The suction housing 78 and the fan housing 20 can be seen here. The air exit opening 24 is designed as a plurality of horizontal slots.

[0116] Figure 8 Show according to Figure 2 1 . A top view of the device 10 of an exemplary embodiment of FIG. 1 is shown here of the intake housing 78 , which has an operating unit 86 .

[0117] The described device 10 allows the suction or extraction of smoke in a very energy-efficient and targeted manner, wherein the device is in particular designed to be movable, so that it can also be used for many purposes in the kitchen or at a cooking area outside a building.

Claims

1. A device (10) for extracting smoke, the device comprising an intake housing (78) and a fan (96), wherein the intake housing (78) comprises an air inlet structure (40), wherein the air inlet structure (40) comprises an upper wall portion (54) and a lower wall portion (62), the upper wall portion (54) having an upper inflow edge (56), the upper wall portion and the lower wall portion forming an inner space (57) having an inlet opening (72), and wherein the air inlet structure (40) has a horizontal opening angle (γ), wherein the horizontal opening angle (γ) is an angle in a horizontal cross-sectional view of the air inlet structure, the edges of the horizontal opening angle being in contact with the lateral inner wall portion, wherein at least the upper wall portion (54) has a wave shape (59) on the inner side (60), the wave shape having at least two upwardly protruding surface segments (75, 77), wherein the inner space (57) has a widening portion (61, 63) at least in the region of the upwardly protruding surface segments (75, 77), and wherein The upper inflow edge (56) is at least a portion of a downwardly protruding face segment, which is connected to the upwardly protruding face segment (75).

2. The device (10) according to claim 1, characterized in that A first widening (61) is associated with the inlet opening (72).

3. The device (10) according to any one of claims 1 or 2, characterized in that The second widening ( 63 ) is associated with the outflow opening ( 64 ).

4. The device (10) according to claim 1, characterized in that A projection (83) is associated with the access opening (72).

5. The device (10) according to claim 4, characterized in that At least one cover (82) is associated with the upper side (16) of the device (10), and at least one cover (82) at least partially surrounds the air inlet structure (40), wherein the at least one cover (82) forms the protrusion (83).

6. The device (10) according to claim 4, characterized in that The projection (83) extends away from the air inlet structure (40) at an upper side (16) and / or at least one side (12, 13) of the device (10).

7. The device (10) according to claim 4, characterized in that The projection of the projection (83) decreases from the upper side (16) of the device (10) via the air inlet structure (40) in the direction of the lower side (17) of the device (10).

8. The device (10) according to claim 1, characterized in that The suction housing (78) is detachably connected to the fan housing (20).

9. The device (10) according to claim 8, characterized in that The suction housing (78) is rotatably connected to the fan housing (20).

10. The device (10) according to claim 8, characterized in that The fan housing (20) has a fan (96) which can be switched on and off by means of a safety switch (23).

11. The device (10) according to claim 8, characterized in that The intake housing (78) and the fan housing (20) are movable together and / or separately from each other.

12. A method for extracting fumes above a cooking zone by means of a device (10) according to any one of claims 1 to 11, characterised in that An air flow (18) is generated by a fan (96) into an intake housing (78), the intake housing having an air intake structure (40), wherein the air intake structure (40) has a horizontal opening angle, The air flow (18) is at least partially applied to at least the upper wall portion (54) of the air inlet structure (40), the upper wall portion having a wave shape (59) at least on the inner side (60), the wave shape having at least two upwardly protruding surface segments (75, 77), The air flow (18) is directed to a fan (96) at least via an outflow opening (64) of the air inlet structure (40).

13. Use of a device (10) according to any one of claims 1 to 11 for extracting fumes above a cooking area.

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