extractor hood

Description

[0001] Extractor hood Extractor hood The invention relates to an extractor hood for arrangement above kitchen stoves or the like, preferably in or on Upper cabinets in kitchens, the housing of which has an air inlet shaft on the underside, in which filters for cleaning the air are arranged.

[0002] In modern fitted kitchens, it is desirable to organically integrate extractor hoods into a wall cabinet located above the kitchen stove. to position it, or at least to ensure that the width of the extractor hood does not exceed the width of the upper cabinets. The width of the upper cabinets However, it is significantly smaller than the width of kitchen stoves, so that one can use extractor hoods whose width is no greater than the width The upper cabinets cannot extract all the fumes rising from the stove during cooking or frying. In a known case... The range hood (US-PS 2 535 707) is designed to mitigate this disadvantage by being equipped with an extendable frame which is in In its extended state, it creates an air inlet opening whose width is greater than the width of the upper cabinet above it. In this case The familiar extractor hood connects to its outlet a narrow air duct adjacent to the back of the upper cabinet, which only It has a very narrow width and contains a fan and a filter for cleaning the extracted air. However, this filter has a very narrow width and is therefore not particularly effective, and also poses a challenge for the conditions present in its area. Airflow velocities It presents a significant flow resistance, hindering effective air extraction. Another disadvantage is that, due to its design, this filter... Its narrow width means it quickly becomes saturated and therefore needs to be replaced very frequently.

[0003] EB is an object of the invention to provide a range hood that is particularly suitable for installation in upper cabinets of fitted kitchens. to create a narrow space that still provides effective extraction and filtration of all fumes from a kitchen stove or similar appliance. This allows the filter to filter out rising cooking fumes, frying vapors, or similar air, whereby the effective filter cross-section should be as large as possible so that the The flow resistance of the filters is low and the filters can have a large capacity.

[0004] To solve this problem, in a range hood of the type mentioned at the outset, it is provided according to the invention that the width of the air inlet shaft by moving a movable [element] comprising the shaft front wall, shaft side wall parts and a frame ceiling The frame is adjustable so that, with the frame inserted, at least two filters are arranged one above the other in the shaft, of which at least one first filter is installed stationary in the shaft, and at least one second filter is located in the movable frame at a distance is located below the frame ceiling section, which together with the frame increases the effective filter cross-sectional area It is extendable.

[0005] The extractor hood according to the invention is characterized in that the first and second filters and, if necessary, further filters are located in the inserted state of the frame stacked on top of each other are arranged and, by pulling out the frame, the filter(s) arranged in the frame are moved into a position in The air to be cleaned flows effectively parallel to the air drawn in through the first filter. The air on this The total available cross-sectional area of ​​the frame can be as large or almost as large as the cross-section of the frame when it is pulled out. This would be the air intake opening of the extractor hood. When the frame is pushed back into its retracted position, then... The filters are stacked on top of each other, so that the movable filter(s) are then housed in a space-saving manner. This arrangement of the filters also has the advantage that they are easily accessible and can therefore be reactivated or replaced without difficulty even by inexperienced housewives. The extractor hood according to the invention has a It features a simple, reliable design; moving the frame can easily be done by any housewife or similar person. It also has The housewife has the option of moving the movable frame completely or only partially into its extended position, as required. For example, if cooking is only done on the rear cooking zones of the stove, the frame cannot be pulled out, or not completely. needs.

[0006] Another advantage is that this extractor hood can be arranged at a relatively short distance above the kitchen stove or the like. This is possible because the movable frame can no longer be used for manipulations at the stove, for example for stirring. or less far It can be pushed back to allow for easy manipulation. The frame can then be moved forward again. become.

[0007] It may be advantageous to provide that the first and / or second filter has a basket or the like in which at least one The filter unit is replaceable. The filter basket only serves to hold the filter unit.

[0008] He himself does not need to participate in the actual filtration process, although he could also use a washable coarse filter or the like. may be provided.

[0009] Preferably, all filters have approximately the same width. This results in optimal utilization of the width of the Extractor hood with the frame for the filter cross-sections inserted. By pulling out the frame, the effective filter cross-section can be adjusted. The effect can be roughly doubled by moving the second filter.

[0010] A particularly favorable airflow and bearing of the movable frame in the housing of the extractor hood at large The effective filter cross-section with the frame pulled out is achieved when the front wall of the frame is moved from its vertical position into a The frame can be pivoted into an obliquely inclined position from top to bottom and outwards. It is preferably provided that the first side wall sections of the frame... are merely guided straight and the front wall together with / it firmly connected second side wall parts relative to the first side wall parts is pivotable. In some cases, however, it may also be intended that the entire movement of the frame is only possible through pivoting the front wall with side wall parts fixed to it or by straight movement of the frame.

[0011] Advantageously, an air conveying device for drawing in and conveying the air to be cleaned is arranged inside the extractor hood, for example a radial fan, cross-flow fan or the like.

[0012] The extractor hood according to the invention can be used either for cleaning recirculated air or for cleaning air from the relevant The air must be designed to be extracted from a kitchen room or similar space. If, as is preferred, it is designed for recirculated air purification, It is expediently provided that the outlet for the purified air is located between the top of the frame's front wall and a stationary ceiling of the The housing of the extractor hood is provided, with the frame ceiling being expediently designed to achieve the lowest possible installation height. The extractor hood is located at a distance below the level determined by the stationary ceiling of the housing. However, other options are also available. Possible arrangements for the air outlet include, for example, near the back of the extractor hood, in side wall areas, or similar locations.

[0013] The novel extractor hood is also characterized by the fact that it can have a very low installation height and is overall very It saves space.

[0014] The invention is explained in more detail below with reference to a preferred embodiment and further features. In the The drawings show: Fig. 1 a diagrammatic view of a kitchen stove with a device arranged above it according to the invention. Extractor hood, which forms the lower part of a kitchen wall cabinet, Fig. 2 the extractor hood according to Fig. 1 in cutaway view, Enlarged representation, Fig. 3 shows the extractor hood according to Fig. 2, wherein its movable and 4 licher frame is extended to two different distances. Positions are shown.

[0015] Above the kitchen stove labelled 10 in Fig. 1 is an upper cabinet 11, the width (also called depth) of which is approximately the half the width of the kitchen stove corresponds to lo.

[0016] The upper part of this wall cabinet 11 has a pivoting door 12, behind which compartments for dishes or the like are provided. The lower section of this upper cabinet 11 is formed by a range hood 12 according to the invention, which is organically integrated into the It is built into an upper cabinet, so that in the state shown in Fig. 1 it is practically unrecognizable as a kitchen extractor hood.

[0017] The extractor hood, which can be seen in more detail in Figs. 2-4, has two stationary side walls, as shown in 14, and a stationary Back wall 15, which forms the wall areas of the side walls or the back wall of the upper cabinet.

[0018] It is further bounded at the top by a stationary ceiling 17, which is formed by a shelf of the upper cabinet. In A stationary intermediate ceiling 19 is arranged below this stationary ceiling 17, in which an air conveying device 21, here a radial blower is arranged, the impeller of which is designated 22 and the electric motor 23. This air conveying device 21 draws air from the during operation. The air enters the air passage chamber 25 located above the intermediate ceiling 19 via the air inlet shaft 24 located below the intermediate ceiling 19. In the case of Fig. 2, the conveyed air can be discharged from the extractor hood through a front outlet slot 26 in an obliquely upward direction. outflow.

[0019] In the air inlet shaft, as shown in Fig. 2, two filters 29, 30 are arranged one above the other, each of which consists of a sheet metal basket with a grid bottom. and consists of interchangeable, plate-shaped filter units inserted into this basket, each of which has a lower grease filter layer made of glass- or plastic mats or the like, and has a fume filter layer made of activated carbon or the like. Of course, the Filters may also have a different design and / or composition. The lower filter 29 has a rectangular flange that is mounted on rests on the edge of a rectangular floor opening of a stationary floor 31 of the extractor hood.

[0020] The second filter rests on the top of the first filter and can be detached by means of a spring-loaded snap fastener (retaining brackets)n32 hinged, which are fixedly arranged on the inside of an extendable shaft front wall 33. This shaft front wall 33 extends over the height of the extractor hood and in the position according to Fig. 2 is aligned with the door 12 of the upper cabinet.

[0021] The airtight front wall 33 of the air inlet shaft 34, which can be extended forwards to enlarge the air inlet opening 35 and the effective filter cross-section of the extractor hood, and a angled frame ceiling 36, two straight first side wall sections, as 37, and two fixedly connected to the front wall 33, together with The front wall has second side wall sections, such as 39, which can pivot about a pivot axis. The geometric pivot axis 40 of the front wall 33 is located at the upper front end of the frame ceiling 36, which is firmly connected to the straight-guided first side wall sections 37 and is in in the inserted state of the frame 34 rests on the intermediate ceiling 19 with a horizontal area and in the extended state of the The frame (Figs. 3 and 4) forms an extension of the stationary intermediate ceiling 19. As can also be seen from the drawing, the entrance opening 35 with frame 34 pulled out through the narrow bridge 44 into two rectangular partial openings - undivided-.

[0022] Instead of the filter baskets of filters 29, 30, other suitable frames or the like can also be used to hold the filter units. The filter units may be designed to fit into the system without frames or the like, or they may be designed to fit into the system without needing to accommodate them. They can be used with extractor hoods.

[0023] The movable frame 34 practically forms a up to not The illustrated stops allow the "drawer" to be pulled out in a straight direction to the position shown in Fig. 3; the drawer is open at the bottom and back. in which the second filter 30 is arranged, which is prevented from falling out by resting slidably on the first filter 29 on the one hand and on the other hand, the retaining brackets 32 are held in place by the shaft front wall 33.

[0024] Between the upper surfaces of the two parallel, straight-guided first side wall parts 37 of the frame 34 extends across the clear width of the extractor hood is an air passage grille 41, which is firmly connected to these first side wall parts 37 and at The movable frame 34 is extended into the position shown in Fig. 3, in which the air passage grille of the then present Air outlet opening 42 of this extractor hood is formed.

[0025] The second side wall parts 39 of the shaft, which are pivotable relative to the straight-guided first side wall parts 37, The shaft 24, which are firmly connected to the front wall 33, form extensions of the first when the front wall 33 is folded out (Fig. 4). Shaft side walls dunit der' air outlet shaft 24 is enclosed on all sides by walls.

[0026] In the unfolded state, the front wall 33 is directed obliquely from top to bottom outwards, as shown in Fig. 4. This makes it possible to The inlet opening 35 of the air inlet shaft 24 is opened by pulling out the movable frame 34 and folding out the shaft front wall 33. to bring it to such a size that everyone can cook from the stove containing air or roasting or the like, rising steam, with the air conveyance device 21 switched on, into the extractor hood through the The air is drawn in through filters 29 and 30, is cleaned as it flows through the filters, and then exits as cleaned air through air outlet 42. The air is blown back into the kitchen in a downward direction from bottom to top.

[0027] If cooking or frying is only done on the rear cooking plates of the kitchen stove, the extractor hood 13 may in some cases can also be operated in the position shown in Fig. 2, in which case the drawn-in air flows through both filters 29, 30 one after the other and through the Air is blown back into the kitchen through the air outlet slot 26. However, even in this case, it is better to completely or partially conceal the movable frame 34 in to pull out the position shown in Fig. 3 or to open it to the maximum position shown in Fig. 4.

[0028] To reactivate or replace the filter units, the two filters can be easily removed by hand from the extractor hood. They can be removed and reinserted, even by inexperienced housewives. For this purpose, it is only necessary to remove frame 34. to bring into the position shown in Fig. 4 and to push the second filter by hand from bottom to top until it comes out of the retaining brackets 32. and then it can be lifted downwards. The first filter can then be lifted with one hand and pushed through with the other hand. The opening located between the floor 31 and the front wall 33 can be easily removed.

[0029] The filters are reinserted in reverse order.

[0030] This extractor hood can only be operated by means of a handle attached to the front of the front wall 33. this occurs, whereby the front wall in the folded-out position according to Fig. 4 is moved solely by the friction of the second filter 30 on the first filter. 29 can be held. If desired or necessary, additional friction or detent holders or other means can of course be provided. so that the front wall 33 holds itself in the swung-out position or also holds itself in intermediate positions (stepless or continuous), such that it is convenient to use one-handed operation to move the movable frame 34 and pivot its front wall 33 gets by.

[0031] The inclined position of the front area 43 of the ceiling 36 of the movable frame 34 is advantageous for the Guiding the air flowing into outlet 42.

[0032] This extractor hood according to the invention has a very shallow installation depth and height and can therefore be installed as shown in Fig. 1, It can be organically installed in standard wall cabinets of the usual installation depth. When inserted, it does not obstruct any operation of the hob. In its extended position, it effectively draws in all fumes rising from the hob's cooking zones. If necessary, it can also be used during operation. Cooking or frying to perform manipulations at the rear stoves at any time their fully extended position is pushed back far enough so that all necessary manipulations can be carried out undisturbed, after the manipulation has been carried out, it can be easily pulled out again.

[0033] The guidance of the straight-guided first side walls 37 of the frame 34 in the housing of the extractor hood can be in drawers as is known in itself, for example sliding guides or, for particularly smooth running, rollers or Ball guides or similar measures may be provided.

[0034] The filter units inserted into the filter baskets can preferably be designed as compact units that are easy to replace. The filter baskets do not need to be replaced. It is particularly advantageous if these filter units are in the relevant The kitchen itself can be reactivated, which can be done in a generally known way by subjecting it to a sufficiently high temperature for a period of time. exposes it to a temperature of, for example, 250°C. This can be done in the oven of the relevant stove.

[0035] The illustrated extractor hood can easily be modified so that the purified air is not returned to the kitchen as recirculated air. is not returned, but is diverted to the outside through a chimney or the like by closing the opening 26 and replacing the Grid 41 uses an airtight plate. Under certain circumstances, the air conveying device within may also be affected. The extractor hood can be dispensed with, provided that there is sufficient draft in the exhaust system to which this extractor hood is connected. is present or this extraction system has its own air conveying device.

[0036] If even smaller installation dimensions are desired or greater extendability is desired, three or more filters can also be used. Arrange them one above the other, extending them telescopically relative to each other. For example, the first one, which is straight, could be attached to this for this purpose. A filter may be detachably arranged on the side parts 37 and a third filter may be detachably hinged to the front wall 33.

Claims

[0037] Patent Claims [0038] . extractor hood for arrangement above kitchen stoves or the, light, preferably on or in upper cabinets of kitchens, whose The housing has a suction inlet shaft on the underside, in which filters for cleaning the vent are arranged, characterized by this. hnet that the width of the air inlet shaft (24) can be changed by moving one of the shaft front wall (33), shaft side wall parts (37, 39) and a The movable frame (34) having a frame ceiling (36) is adjustable so that in the shaft (24) with the frame inserted at least two filters (29, 30) are arranged one above the other, at least one of which a first filter (29) is stationary in the shaft, and that in the movable frame at least a second filter (30) is arranged at a distance below the frame ceiling, which together with the frame to The overall width of the effective filter cross-sectional area can be extended. [0039] 2. Extractor hood according to claim 1, characterized in that the second filter (30) rests on the first filter (29) and during Extending the movable frame (34) on the first filter slides. [0040] 3. Extractor hood according to claim 1 or 2, characterized in that all filters have approximately the same width. [0041] 4. Extractor hood according to one of the preceding claims, characterized in that the front wall (33) of the frame (34) is made of It can be pivoted from a vertical position into a slanted position inclined from top to bottom outwards. [0042] 5. Extractor hood according to claim 4, characterized in that the frame has first straight-guided side wall parts (37) and with the front wall (33) has firmly connected second side wall parts (39) such that the frame can be moved into a first position by straight sliding its first side wall sections are extendable and the total width of the entrance opening of the air intake shaft is increased by subsequent pivoting the front wall of the shaft - and the second side wall sections firmly connected to it - can be further enlarged, and that the second filter is articulated with the pivoting parts of the frame. [0043] 6. Extractor hood according to one of the preceding claims, characterized in that the outlet (26, 42) for the cleaned Air is provided between the top of the frame's front wall and a stationary ceiling of the extractor hood's housing, wherein the The rabmen ceiling (36) is located at a distance below the plane defined by the stationary ceiling (17) of the housing. [0044] 7. Extractor hood according to one of the preceding claims, characterized in that in its housing at a distance ~below a stationary intermediate ceiling (19) is arranged in the stationary housing ceiling (17), in which at least one air passage opening (20) is arranged is, through which air can be conveyed to the air outlet by means of an air conveying device (21) arranged inside the extractor hood, and that the frame ceiling (36) in the extended state of the frame forms an extension of the intermediate ceiling (19). [0045] 8. Extractor hood according to one of the preceding claims, characterized in that the second filter (30) is detachably attached to the movable frame (34) is hinged and that the first filter (29) is loosely inserted into a bottom opening of the housing of the extractor hood is such that, with the frame pulled out, the first filter, after the removal of the second filter, passes through the then free lower opening of the the shaft area encompassed by the frame (34) is removable, 9. extractor hood according to one of the preceding claims, wherein characterized in that the first and / or second filter (29,30) has a basket in which at least one filter unit is replaceably inserted.