Filter device for a mobile grill

Abstract

Filter device (1) for a mobile grill (100), wherein the filter device (1) comprises a hood (2), a fan (3) and a filter (4), and is arranged to suck air into the hood (2) with the fan (3), to pass it through the filter (4) and to blow it out of the hood (2), characterized in that the filter device (1) is mobile and has an adjustable holding arm (5) by means of which the hood (2) can be positioned above the grill (100).

Description

[0001] The invention relates to a filter device for a mobile grill and to an arrangement comprising a filter device and a mobile grill, wherein the filter device has a hood, a fan and a filter. State of the art

[0002] For some time now, filter and exhaust air devices have been known to purify exhaust air from cooking and / or fireplaces. These devices capture, for example, cooking or grilling fumes. The captured air is removed, filtered if necessary, and released into the environment elsewhere, preferably outside a building.

[0003] With increasingly improved filter technology, exhaust air and filter devices have also become established. These keep the filtered air within a building and sometimes even return it to the same room as the grill / cooking area, with corresponding advantages regarding air pressure conditions and heat loss. Such filter and / or exhaust air devices are usually permanently installed.

[0004] Exhaust ventilation systems are rarely provided for cooking and / or fireplaces operated outside buildings. Although smoke vents are also known for outdoor fireplaces, such as so-called barbecue fireplaces, these primarily serve, as in DE7223278U, with their chimney effect to generate an airflow or improve the flow of flue gases.

[0005] However, it is not uncommon for the resulting fumes and / or smoke gases to cause unwanted nuisance to other people when used in densely populated residential areas, even when grills are operated outdoors. Disclosure of the invention

[0006] The object of the present invention is to provide a solution to reduce the aforementioned problem.

[0007] The object is achieved according to the invention by the features of the independent claim. Advantageous embodiments of the invention are specified in the subclaims.

[0008] According to the invention, a filter device for a mobile grill, in particular for outdoor use, is provided, wherein the filter device comprises a hood, a fan and a filter, in particular an activated carbon filter for filtering out odors, wherein the filter device is designed to suck air into the hood, in particular on the underside thereof, with the fan, to guide it through the filter, and to blow it out of the hood, in particular on the upper side thereof, preferably into the environment, wherein the filter device is mobile, that is to say movable and independent of the grill, and has an adjustable holding arm, by means of which the hood can be positioned, in particular centrally, above the grill, that is to say in particular centrally above an actively used grill grate or a heating or grilling surface of the grill.

[0009] The filter device can have a mobile stand or a generic or adaptable fastening device, and the holding arm can be arranged on one side of the mobile stand or the fastening device. The holding arm can be fastened to the grill in a mobile, i.e., retrofittable and detachable, manner using a fastening device. A generic fastening device can be based on various fastening methods such as screwing, clamping, or plugging and can be designed, in particular, to be fastened to a structural element of a grill substructure, for example, a strut or a plate, in particular to enable the filter device to be fastened to various mobile grills.A fastening device that is as universal as possible, for example a clamping device for a 1 to 3 cm thick strut as a relatively common structural element of a grill, can enable the filter device to be attached to a relatively large number of mobile grills and thus allow the corresponding grills to be retrofitted with a filter device.

[0010] Advantageously, the stand, for example, standing on the same surface as the grill, can be movable relative to the grill for positioning. Additionally or alternatively, the support arm can be adjustable relative to the stand or the fastening device, for example, with regard to height and / or length and / or angle of rotation, particularly the horizontal angle of rotation. Alternatively or additionally, the hood can be adjustable relative to the support arm.

[0011] A holding arm that is adjustable on a support arm, in particular in terms of its length and / or height, and / or rotatable relative to the stand or fastening device, has a number of advantages. It can be positioned almost anywhere in the vicinity of the grill and thus offers a high degree of flexibility with regard to the arrangement of the filter device and a grill. Advantageously, the height of the hood, in particular the height of a collecting surface of the hood, is variably adjustable for vertical positioning above a grill surface of the grill. Height adjustability allows the hood to be positioned more or less closely above the grill or the food on it, depending on the user's preferences, for example, depending on the height of a grill grate.Depending on the temperature and / or smoke development, the hood can be adjusted to varying degrees of density, its height, for example above the grill grate or above a heat source, and / or optimized with regard to the respective requirements.

[0012] For convenient, generous access to the grill, it may be necessary to temporarily raise or remove the hood. The filter device can advantageously have a quick-locking mechanism, particularly a quick-release clamp, for adjusting the height of the collecting surface, particularly one-handed. A one-handed quick-locking mechanism can allow the height of the hood to be adjusted with one hand while holding fuel or grilling tools with the other.

[0013] For convenient, generous access to the grill, a rotatable or pivoting support arm can be temporarily swung to the side, for example, for loading the grill with fuel or grilled food. For this purpose, the filter device can have a rotating or pivoting mechanism, particularly for pivoting or rotating horizontally. The support arm can be designed to pivot about a pivot axis relative to the stand or mounting device.

[0014] The rotating or pivoting mechanism can have one or more locking positions in which a rotation angle can be fixed. The position of the locking positions relative to the fastening device or the stand can advantageously be adjustable in order to be able to fix the filter device in optimal adjustment positions "above the grill" and "next to the grill", for example. These locking positions or a corresponding locking mechanism can be designed in such a way that a fixation can be overcome if a predetermined or predeterminable force is exceeded, in order to be able to adjust the filter device even in the fixed locking position, for example in a dangerous situation or in the event of a strong gust of wind or storm.

[0015] A length-adjustable holding arm offers the advantage of being able to adjust the filter device to the respective distance from the stand or fastening device on grills of different sizes or with different projections, or, for example, in the case of cooking stations with several grills and / or cooking zones, to be able to place it centrally above each grill zone in use.

[0016] If the support arm is attached to a mounting device, it can be designed to encompass a grill grate and / or a fire pit. If the support arm is attached to a stand, the support arm and stand can be constructed as a single piece, similar to a traffic light pole.

[0017] In an advantageous embodiment, the support arm and / or the stand are designed to be adjustable without tools. A fastening device can advantageously be designed as a tool-free, manually operable clamp or screw device.

[0018] In an advantageous embodiment, the filter device and its configurations, in particular features accessible from the outside such as the holding arm or the hood, are made of heat-resistant, in particular metallic, and / or fire-resistant materials.

[0019] The filter device is designed for outdoor operation, particularly outside enclosed buildings. The flue gases can be discharged from the hood, preferably directly into the environment, i.e., within a short range of a few meters, particularly less than one meter, and / or directly from the top of the hood. The filter device is preferably designed without an exhaust duct and / or exhaust hose.

[0020] Such a design feature has the advantage that the filter device can be put into operation very easily and conveniently, without requiring the installation of a hose routing system, especially for the removal of hot flue gases. The flue gases are preferably discharged directly above the hood, and thus at a location where the user is already familiar with high temperatures. This eliminates any additional safety risks to people and equipment due to unsuitable or even merely obstructive hose routing, or the disproportionately high installation effort required for a mobile, temporarily deployed device.

[0021] In an advantageous embodiment, the hood of the filter device has an effective collecting area / opening area between 15 dm 2 and 30 dm 2When the filter device is used outdoors, the flow of the hot flue gases depends on natural convection and, in some cases, strongly on the currents of the ambient air, i.e., the wind.

[0022] Advantageously, the hood of the filter device has an effective collection area / opening area that is approximately the same size as the grill surface, and advantageously exceeds it. Thus, for example, in calm conditions, only flue gases subject to natural convection are captured by the filter device due to the geometry of the collection area / opening area of the hood. Typically, a grill surface has a round or rectangular base. In order to have a collection area that exceeds the grill surface, i.e., the area of the grill surface, if possible, the hood preferably has an effective collection area of between 15 dm 2 and 30 dm 2This corresponds to a circular area with a radius between approximately 43 cm and 62 cm, or a rectangular area of, for example, 30 cm x 50 cm to, for example, approximately 55 cm x 55 cm or 50 cm x 60 cm. Advantageously, the collecting area of the hood can also be variable, and in particular, enlargeable, in particular in the manner of a funnel, for example by means of flaps.

[0023] Furthermore, the filter device is advantageously designed, particularly by virtue of the adjustable effective length of the support arm, to position the collection surface / opening surface of the hood centrally above the grilling surface. Central positioning above the grilling surface offers the advantage that the collection surface is optimally utilized to capture only those flue gas flows through the hood that are subject to thermal forces. The effective length of the support arm can be adjusted, for example, by a telescopic extension based on the principle of an extendable boom, by suspending the hood from a glider that can be moved along the support arm, or, for example, by implementing a cross or universal joint between the stand and the support arm in the form of a lockable plain bearing.

[0024] The filter device is advantageously configured to align the collecting surface parallel, or parallel and centrally, to the grill surface of the grill. To achieve a central or central positioning of the hood over a grill surface of the grill, particularly while simultaneously aligning the collecting surface parallel to the grill surface, a horizontal position of the hood, particularly a horizontal position of a collecting surface of the hood, is variably adjustable.

[0025] Advantageously, the filter device is designed such that, for horizontal positioning, an effective length of the holding arm, in particular a horizontal position of a collecting surface of the hood, above the grill surface of the grill can be variably adjusted within a horizontal range of variation of at least 20 cm.

[0026] A maximum horizontal projection width between the stand or a fastening device, in particular at the height of a grill grate, and the center of the collecting surface of the hood can be at least 40 cm, advantageously at least 50 cm, and in particular at least 60 cm. It should be taken into account that a stand or a vertical component of the fastening device will generally have a minimum distance from the grill surface in order to avoid excessive heating of the stand or the vertical component.

[0027] The filter device can also have a quick-fixing mechanism, in particular a quick-release clamp, which can be operated with one hand, in particular for adjusting the horizontal position.

[0028] As an alternative to a rotation angle that can be fixed in various locking positions, a horizontal rotation angle of the support arm in relation to the stand or in relation to the fastening device for aligning the hood, in particular the collecting surface of the hood, above the grill surface of the grill can also be variably adjustable, in particular continuously variable.

[0029] The filter device can also have a quick-fixing mechanism, in particular a quick-release fastener, which can be operated with one hand, in order to adjust this angle of rotation.

[0030] Furthermore, the hood can advantageously be arranged on the support arm with a pendulum suspension or can be designed as a pendulum suspension. This can be freely movable and, if necessary, also lockable. This type of suspension offers the advantage that when the hood is suspended above its center of gravity, a vertical alignment can be achieved through gravity alone. For smoke gases that rise vertically and are only subject to thermals, the collection area is thus automatically maximized. The hood can be fixed in its pendulum-locked position in order to prevent movement due to other influences such as lateral air currents. The adjustable support arm is advantageously designed so that the pendulum suspension can be positioned centrally or in the middle above the grill surface, for which purpose the support arm has the aforementioned extension range.

[0031] To achieve height adjustment above a grill surface, the support arm and / or the hood can be designed to be height-adjustable relative to the stand or the mounting device. Height adjustment offers the advantage of being able to adjust the distance of the hood from the grill grate depending on the grill temperature. Second, it offers the advantage of being able to select the height of the collection area so close to the grill grate that the smoke gases can be almost completely captured by the filter device, even in light to moderate air currents / winds.

[0032] Advantageously, the filter device is designed such that a height position of the hood, in particular a height position of a collecting surface of the hood, for vertical positioning above the grill surface of the grill in a height adjustment range of at least 20 cm can be adjusted to a vertical distance from the grill surface from a range between 5 cm and 60 cm.

[0033] Since efficiency with regard to the proportion of captured flue gases depends heavily on the geometric conditions, i.e., the distance and size of the collection area, as well as on the influence of lateral winds, the filter device has a fan that accelerates the flue gases toward the collection area. In an advantageous embodiment of the filter device, the fan has a volume flow of at least approximately 100 m 3 / h, particularly advantageously of at least about 150, 200, 250, or 300 m 3 / h. The volume flow and / or an electrical power level of the fan can be adjustable. Furthermore, the filter device can have, in addition to a first, additional fans, in particular two, which jointly produce the volume flow.

[0034] In an advantageous embodiment of a height adjustability of the holding arm, the stand or a vertical component of the fastening device can have a telescopic extension, or the arrangement of the holding arm on the component or the stand can be carried out by a cross joint between the stand and the holding arm in the form of a lockable plain bearing.

[0035] Alternatively or additionally, the distance between the support arm and the hood can be adjustable. For this purpose, for example, the hood can be attached to a length-adjustable support cable. This can have a spring-loaded winding mechanism, which enables quick and easy height adjustment of the hood. The support cable can advantageously be designed as a metal wire. Such a suspension offers the advantage that the height of the filter device can be temporarily adjusted along a predefined path with little effort and, for example, with just one hand in order to load the grill with fuel or food to be grilled. The hood can have a heat-insulated handle, for example made of a flame-retardant plastic, preferably on a side facing away from the grill surface.

[0036] Advantageously, the filter device can have one or more protective mechanisms to protect it from damage and / or destruction, in particular due to heat exposure. The at least one protective mechanism can be triggered by one or more trigger mechanisms.

[0037] A first protective mechanism can be designed such that the filter device has a rotary joint or a pivoting mechanism, and that when the first protective mechanism is triggered, the holding arm of the filter device is pivoted / twisted from a position above the grill to a position next to the grill.

[0038] Since the heat from a grill decreases significantly, essentially exponentially, with increasing horizontal distance from the fire pit, pivoting the support arm can quickly and significantly reduce the heat exposure of the filter device. Especially in conjunction with a grill where open flames can occur, this protective mechanism is comparatively well-suited for quickly moving the filter device from an area directly above the flames.

[0039] Advantageously, the holding arm of the filter device can have a swivel joint or a pivoting mechanism in which a pivoting plane of the pivoting mechanism is inclined relative to the horizontal, or a rotation axis of the swivel joint is oriented inclined relative to the vertical, and wherein, when the protective mechanism is triggered, the holding arm rotates under the effect of gravity from a position above the grill to a rotational position of at least lower or lowest potential energy next to the grill. Advantageously, the angle of rotation relative to the stand or fastening device at which the rotational position of lowest potential energy is located can also be adjustable, so that the user can specify the direction and position in which the holding arm safely rotates when the protective mechanism is triggered.If the rotating or pivoting mechanism has one or more locking positions, the holding arm can have a higher potential energy in the locking position “above the grill” than in the locking position “next to the grill”, and a trigger mechanism can be set up to release the locking in the locking position “above the grill” when triggered.

[0040] A second protective mechanism can be designed such that the filter device has a fire bulkhead which is closed when the second protective mechanism is triggered to protect the filter device, for example arranged on the underside of the hood.

[0041] The fire bulkhead can be formed by one or more flaps, which are preferably arranged in a lower region, for example on the underside of the hood, in particular on an edge of a lower air inlet, and by means of which the underside of the hood, in particular a lower air inlet, can be closed.

[0042] Advantageously, one or more flaps can be arranged in a lower edge region of the hood, wherein the flaps can be configured to enlarge the effective collection area / opening area of the hood in an open state and to substantially close the lower opening of the hood in a closed state. By forming a firewall in a closed position and enlarging an actively effective collection area of the filter device in an open position, the flaps can advantageously have a dual function.

[0043] Alternatively, or as a supplementary fire barrier, the filter device can have a louvre closure by means of which the underside of the hood and / or a lower air inlet can be closed.

[0044] A third protective mechanism can be configured such that the filter device has a device for reversing the direction of the airflow within the filter device. This device can be designed such that, upon triggering the third protective mechanism, the direction of the airflow is reversed, with the fan drawing in air from the top of the hood. This air can be directed through the filter and, for example, blown out through the bottom.

[0045] Since the air above the filter device is further away from the fireplace, it is cooler than the air on the underside of the filter device, particularly in the case of horizontally superimposed air movements such as wind, so that an additional protective mechanism can be implemented if necessary with this comparatively easy-to-implement feature.

[0046] For example, the fan may have a propeller and the direction of the air flow may be reversed by reversing the direction of rotation of the propeller.

[0047] If the filter device has one or more flaps with which, for example, the underside of the hood, in particular a lower air inlet, can be closed, the at least one flap can be configured to function as a check valve in its closed or a third state. This allows air to flow out of the underside of the filter device when the air flow is reversed despite a closed firewall. In one embodiment of this feature, the at least one flap can have a spring mechanism that allows air to flow out of the hood even when the flap is closed.For this purpose, the suspension can be designed in such a way that an overpressure in the hood, which is higher than an ambient pressure and is caused in particular by a reversal of the air flow, opens at least one flap to such an extent that a force acting on the flap due to the air pressure and a spring force acting on the flap compensate each other and air can flow out of the hood from a flap which is thereby partially opened.

[0048] A fourth protective mechanism can be designed such that the filter device has an air duct for supplying cold air, and that when the fourth protective mechanism is triggered, cold air is supplied to the filter device, for example via the air duct from a spatial area below and / or next to the grill.

[0049] The air duct can be routed through the support arm and / or the stand, for example. Irrespective of this, the air duct can open into the hood above or below the filter. Opening the air duct above the filter is easy to implement and, with simultaneous flow reversal, offers the advantage of also cooling the filter. Opening the air duct below the filter offers the advantage that the fan can operate in its usual direction to cool the filter. Furthermore, the fan can increase or cause the air supply through the air duct through a suction effect when the firewall is closed.

[0050] Advantageously, the air duct or the hood has at least one non-return valve which prevents the penetration of air, for example hot grill fumes, from the hood into the air duct, for example a holding arm designed as a tube.

[0051] Advantageously, a control valve can be arranged in the air duct, which prevents airflow through the air duct, for example, through the retaining arm, as long as the fourth protective mechanism is not triggered. This can prevent a flow of hot air from forming in the air duct, which could escape from an inlet of the air duct and thus pose a hazard.

[0052] In addition, the air duct may have a cold air fan which is designed to supply cold air into and / or through the air duct into the hood.

[0053] Advantageously, a filter device with the first and / or the second protective mechanism can have a pre-tensionable spring mechanism, wherein upon triggering of the first protective mechanism, the spring mechanism causes or assists a rotation of the holding arm and / or upon triggering of the second protective mechanism, the spring mechanism causes or assists a closing of the fire bulkhead by a spring force.

[0054] A pivoting mechanism according to the first protective mechanism may comprise a pre-loaded coil spring or a twisted leaf spring in an operating position “over the grill”.

[0055] An air barrier according to the second protection mechanism may comprise a spring mechanism which applies a preload to flaps or slats in an open position by means of preloaded helical or twisted leaf springs.

[0056] Advantageously, the filter device can be configured for manual tensioning of the aforementioned spring mechanisms. Manual tensioning of the spring mechanisms not only allows for cost-effective implementation but also allows the use of comparatively strong springs, which can result in a comparatively rapid response of the protective mechanisms.

[0057] To trigger protective mechanisms designed in this way, a spring mechanism can have an unlocking mechanism. This can, for example, be configured to unlock a locking mechanism of a pivoting mechanism or an open position of a fire flap. The unlocking mechanism can be part of a triggering mechanism.

[0058] Furthermore, the filter device can be configured such that, when a predetermined temperature is exceeded, a triggering mechanism is triggered electrically, in particular by temperature monitoring by means of an electrical temperature sensor in conjunction with the control of an electrical or electromagnetic actuator, or mechanically (for example by deformation), in particular by temperature-dependent deformation of a bimetal.

[0059] In particular, the filter device can be configured such that the trigger mechanism actuates an unlocking mechanism of a spring mechanism, a change in the direction of rotation of the fan is effected, or cold air is supplied to the filter device, for example via the air duct from a room area below and / or next to the grill.

[0060] The filter device can have multiple protective mechanisms and be configured such that a first selection of protective mechanisms is activated when a first temperature is exceeded, and a second selection of protective mechanisms is activated when a second temperature is exceeded. In this way, an appropriate response can be made to the respective situation depending on the respective hazard. For this purpose, it can also be advantageous for the filter device to evaluate a gradient with respect to a temperature change.

[0061] In one possible configuration, the first temperature is lower than the second temperature, and the second selection includes at least the first protective mechanism. A sweeping, independent movement, which in itself can also pose a danger, thus only occurs in a more hazardous situation.

[0062] In a further or the same embodiment, the first selection comprises at least the third protective mechanism, which is easy to implement and does not cause any movement of the filter device or parts thereof.

[0063] Furthermore, the filter device can have a lighting device, which is advantageously arranged in a region of the underside of the hood, in particular in its interior, preferably on its inner edge. An arrangement on the inner edge offers the advantage that, in addition to a lighting device, the filter device can also have flaps as a fire barrier and to enlarge an actively effective collection area, without obscuring the lighting device during normal operation.

[0064] For power supply, the filter device can have an electrical energy storage device, which can be arranged, for example, in a lower region of the stand or in a base to which the stand is connected or connectable. Arranging the energy storage device in a lower region or in the base offers the advantage that the energy storage device is located in a relatively cool area, and the advantage that the stability of the filter device is increased due to a relatively low center of gravity.

[0065] In an advantageous embodiment, a cable is routed between electrical components such as the at least one, advantageously electrically implemented, fan, a lighting device, an electrical circuit associated with a triggering mechanism, a temperature sensor, an electrical or electromechanical actuator, an advantageously electrically implemented control valve, a cold air fan and / or an energy storage device for protection against direct heat exposure and / or flames within the stand, which can advantageously be made of heat-resistant, in particular metallic, and / or fire-resistant materials.

[0066] According to the invention, an arrangement comprising a mobile grill and a filter device for a mobile grill is also provided, wherein the filter device has one or more features of the filter device described above. Drawings

[0067] The invention is explained in more detail below with reference to the attached schematic drawings using preferred embodiments.

[0068] It shows Fig. 1 an embodiment of the described mobile filter device.

[0069] Out of Fig. 1 shows a sketch of an embodiment of the described filter device 1 in a sectional view.

[0070] Fig. 1 shows a filter device 1 for a mobile grill 100, wherein the filter device 1 comprises a hood 2, a fan 3, and a filter 4. The filter device 1 is configured to draw air into the hood 2 with the fan 3, pass it through the filter 4, and blow it out of the hood 2. The filter device 1 is mobile and has an adjustable support arm 5, by means of which the hood 2 can be positioned over the grill 100.

[0071] As from Fig. As can be seen in Figure 1, the holding arm 5 is arranged on a mobile stand 6. The holding arm 5 of the filter device 1 is arranged on a pivoting mechanism 8 and is rotatable or pivotable about a rotation axis 7, wherein in this case the rotation axis 7 is inclined relative to the vertical 9.

[0072] The filter device 1 has several protective mechanisms which can be triggered by one or more triggering mechanisms.

[0073] When a first protective mechanism is triggered, the holding arm 5 of the filter device 1 is pivoted or rotated from a position above the grill 100 to a position next to the grill 100.

[0074] Since the pivoting plane of the pivoting mechanism 8 is not horizontal, or a rotation axis 7 of the pivoting mechanism 8, which is designed here as a rotary joint, is not oriented vertically and the holding arm 5 rotates into a rotational position of smallest potential energy due to the effect of gravity, the holding arm 5 pivots in the present example according to Fig. 1 when the first protective mechanism is triggered from a position above the grill 100, here to the left of the stand 6, to a position next to the grill 100, here to the right of the stand 6.

[0075] The filter device 1 has two flaps 10 at a lower edge region of the hood 2, which flaps are configured to enlarge a collecting area / opening area of the hood 2 in an open state and to substantially close the lower opening of the hood 2 in a closed state.

[0076] The filter device 1 thus has a second protective mechanism in the form of a fire barrier, which is formed by the two flaps 10 in this exemplary embodiment. The flaps 10 are connected to the hood 2 by spring joints 14, wherein the springs of the spring joints 14 have a comparatively slight preload in a closed state or a closed position. In an open state or an open position, the springs of the spring joints 14 have a comparatively strong preload, so that they can close the fire barrier.

[0077] Furthermore, the filter device 1 has a device for reversing the direction of the air flow 11 in the filter device 1, so that the direction of the air flow 11 can be reversed if a third protective mechanism is triggered. A reversal of the direction of the air flow 11 in the opposite direction can be achieved by reversing the direction of rotation of the propeller 12 of the fan 3. A device for reversing the direction of the air flow 11 in the filter device 1 can, for example, comprise an electrical circuit, a switch, or a relay for reversing the polarity of a fan 3 operated with direct current.

[0078] Due to a slight preload of the springs of the spring joints 14, which closes the flaps without any pressure from an inside of the hood 2, in particular against its weight, these flaps perform the function of a check valve in their closed position, so that air can flow out of the hood 2 downwards.

[0079] In addition, the filter device 1 has an air duct for supplying cold air 16, so that when a fourth protective mechanism is triggered, cold air 16 can be supplied to the filter device 1.

[0080] As from Fig. As can be seen in Figure 1, the cold air 16 can be guided in an air duct through the support arm 5 and / or the stand 6. A control valve 18 can be arranged in the air duct, which opens the air duct when the fourth protective mechanism is triggered. Furthermore, the filter device 1 has several, in this case two, check valves 13, which prevent hot air, in particular hot grill vapors, from penetrating the air duct during normal operation.

[0081] To generate and / or amplify an air flow of cold air 16, the filter device 1 can have a cold air fan 17, for example in a lower region of the stand 6.

[0082] Continue from Fig. 1, the filter device 1 has a lighting device 15 in an area on the underside of the hood 2.

[0083] The stand 16 can be detachably mounted on a base 19 having a plate 20. In an arrangement comprising a filter device 1 and a mobile grill 100, the mobile grill 100 can be mounted on the plate 20 to improve the stability of the filter device 1 through its weight. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 7223278U

[0004]

Claims

[1] Filter device (1) for a mobile grill (100), wherein the filter device (1) comprises a hood (2), a fan (3) and a filter (4), and is arranged to suck air into the hood (2) with the fan (3), to pass it through the filter (4) and to blow it out of the hood (2), characterized by , that the filter device (1) is mobile and has an adjustable holding arm (5) by means of which the hood (2) can be positioned above the grill (100). [2] Filter device (1) according to claim 1, characterized by that the filter device has a mobile stand (6) or a fastening device, and the holding arm (5) is arranged on one side of the mobile stand (6) or the fastening device. [3] Filter device (1) according to one of the preceding claims, characterized bythat the filter device (1) is designed to align a collecting surface of the hood (2) horizontally and / or parallel to a grill surface of the grill (100). [4] Filter device (1) according to one of the preceding claims, characterized by that a height position of the hood (2), in particular a height position of a collecting surface of the hood (2), is variably adjustable for vertical positioning above a grill surface of the grill (100). [5] Filter device (1) according to claim 4, characterized by that the filter device (1) has a quick-fixing mechanism, in particular a quick-release fastener, for adjusting the height of the collecting surface, in particular one-handed operable. [6] Filter device (1) according to one of the preceding claims, characterized by that a collecting surface of the hood (2) has an area between 15 and 30 dm 2 has. [7] Filter device (1) according to one of the preceding claims, characterized bythat a collecting surface of the hood (2), in particular in the manner of a funnel, is variable, in particular enlargeable. [8] Filter device (1) according to one of the preceding claims, characterized by that the filter device (1) is designed such that a height position of the hood (2), in particular a height position of a collecting surface of the hood (2), for vertical positioning above the grill surface of the grill (100) in a height adjustment range of at least 20 cm can be adjusted to a vertical distance from the grill surface from a range between 5 cm and 60 cm. [9] Filter device (1) according to one of the preceding claims, characterized by that a horizontal position of the hood (2), in particular a horizontal position of a collecting surface of the hood (2), is variably adjustable for central positioning above a grill surface of the grill (100). [10] Filter device (1) according to claim 9, characterized bythat the filter device (1) is designed such that an effective length of the holding arm (5), in particular a horizontal position of a collecting surface of the hood (2), for horizontal positioning above the grill surface of the grill (100) can be variably adjusted within a horizontal variation range of at least 20 cm. [11] Filter device (1) according to claim 10, characterized by that a maximum horizontal extension width between the stand (6) or a fastening device, in particular at the level of a grill grate, and the center of the collecting surface of the hood (2) is at least 40 cm, advantageously at least 50 cm, and in particular at least 60 cm. [12] Filter device (1) according to one of claims 9 to 11, characterized by that the filter device (1) has a quick-fixing mechanism, in particular a quick-release clamp, for adjusting the horizontal position, in particular one-handed operable. [13] Filter device (1) according to claim 2, characterized by that an angle of rotation of the holding arm (5) in relation to the stand (6) or in relation to the vertical component of the fastening device is variably adjustable for the alignment of the hood (2), in particular the collecting surface of the hood (2), above the grill surface of the grill (100). [14] Filter device (1) according to claim 13, characterized by that the filter device has a quick-fixing mechanism, in particular a quick-release mechanism, for adjusting the angle of rotation, which can in particular be operated with one hand. [15] Filter device (1) according to one of the preceding claims, characterized by that the fan has a volume flow of at least about 100 m 3 / h, particularly advantageously of at least about 150, 200, 250, or 300 m 3 / h. [16] Filter device (1) according to one of the preceding claims, characterized bythat the filter device is designed free of an exhaust air duct and / or exhaust air hose. [17] Filter device (1) according to one of claims 2 to 16, characterized by that a vertical component of the fastening device or the stand (6) and / or the holding arm (5) have a telescopic extension, or the arrangement of the holding arm (5) on the component or the stand (6) is carried out by a cross joint between the stand (6) and the holding arm (5) in the form of a lockable plain bearing. [18] Filter device (1) according to one of the preceding claims, characterized by that the arrangement of the hood (2) on the holding arm (5) has a pendulum suspension. [19] Filter device (1) according to one of the preceding claims, characterized by that the distance between the holding arm (5) and the hood (2) is variably adjustable. [20] Filter device (1) according to claim 19, characterized bythat the hood (2) is arranged on the holding arm (5) on a length-adjustable holding cable. [21] Filter device (1) according to one of the preceding claims 18 to 20, characterized by that the pendulum suspension has a spring-loaded winding mechanism. [22] Filter device (1) according to one of the preceding claims, characterized by that the hood (2) has a heat-insulated handle, for example made of a flame-retardant plastic, in particular on a side facing away from the grill surface. [23] Filter device (1) according to one of claims 2 to 22, characterized by that the filter device (1) has a pivoting mechanism (8) and the holding arm (5) is designed to be pivotable about a rotation axis (7) relative to the stand (6) or the fastening device. [24] Filter device (1) according to one of the preceding claims, characterized bythat it has one or more protective mechanisms which can be triggered by one or more triggering mechanisms. [25] Filter device (1) according to claim 24, characterized by that the filter device (1) has a rotary joint or a pivoting mechanism (8), and that when a first protective mechanism is triggered, the holding arm (5) of the filter device (1) is pivoted or rotated. [26] Filter device (1) according to claim 25, characterized by that a pivoting plane of the pivoting mechanism (8) is not oriented horizontally, or a rotation axis of the pivot joint is not oriented vertically, and that the pivot joint or the pivot mechanism (8) is designed such that the holding arm (5) rotates or pivots into a rotational position or pivoting position of smallest potential energy when the first protective mechanism is triggered by the effect of gravity. [27] Filter device (1) according to claims 24 to 26, characterized bythat the filter device (1) has a fire bulkhead, and that when a second protective mechanism is triggered the fire bulkhead is closed. [28] Filter device (1) according to one of the preceding claims, characterized by in that the hood (2) has one or more flaps (10) at a lower edge region of the hood (2), wherein the flaps (10) are designed to enlarge a collecting surface / opening surface of the hood (2) in an open state and to substantially close the lower opening of the hood (2) in a closed state. [29] Filter device (1) according to one of the preceding claims, characterized by that the filter device (1) has a device for reversing the direction of an air flow (11) in the filter device (1), and that when a third protective mechanism is triggered, the direction of the air flow (11) is reversed. [30] Filter device (1) according to claim 28 or 29, characterized bythat the flaps (10) are arranged to perform a check valve function in their closed state in order to allow air to flow out of the hood (2). [31] Filter device (1) according to one of the preceding claims, characterized by that the filter device (1) has an air duct for supplying cold air (16), and that when a fourth protective mechanism is triggered, cold air (16) is supplied to the filter device (1). [32] Filter device (1) according to claim 31, characterized by that the air duct is guided through the support arm (5) and / or the stand (6). [33] Filter device (1) according to one of claims 24 to 32, characterized bythat a first and / or a second protective mechanism have a pre-tensionable spring mechanism and, when the first protective mechanism is triggered, a first spring mechanism causes or assists a rotation of the holding arm (5) and / or when the second protective mechanism is triggered, a second spring mechanism causes or assists a closing of a fire bulkhead by means of a spring force. [34] Filter device (1) according to one of claims 24 to 33, characterized by that the triggering mechanism is triggered electrically, in particular by temperature monitoring by means of an electrical temperature sensor in conjunction with the control of an electrical or electromagnetic actuator, or mechanically, in particular by a temperature-dependent deformation of a bimetal. [35] Filter device (1) according to one of the preceding claims, characterized bythat the filter device (1), in particular in the region of the underside of the hood (2), has a lighting device (15). [36] Arrangement of a mobile grill (100) and a filter device (1), characterized by that the filter device (1) is mobile according to one of the preceding claims.

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