EP2249087A2 - Extractor hood with covers for air passages - Google Patents

Abstract

The hood (1) has air passage surfaces, and a cover (12) attached to the air passage surfaces and movable relative to the air passage surfaces. The cover is partially accommodated in a retainer and closes the air passage surfaces in a rest position. The cover releases an edge gap in an operating position. An edge of the cover is tapered such that the cover tapers along direction of the air passage surfaces. One of the passage surfaces is an air outlet surface for discharging cleaned air from the hood. The cover is made of metal and glass.

Description

The invention relates to an extractor hood with at least one cover for an air passage area.

Conventional extractor hoods have filter surfaces for grease separation of the resulting air-water-fat mixture, which is also referred to as vapors. Usually this metal mesh filters or expanded metal filters are used, which are located on the cooktop facing the bottom of the hood.

For extractor devices, in particular extractor hoods, it has been proposed in recent years to cover the suction opening of the hood as far as possible with a baffle plate. This type of suction is also referred to as edge suction. This means edge suction that the actual filter surfaces are covered by a metal or glass cover. To this cover or baffle plate runs a circumferential gap in the vapor enters or is sucked. The advantage of this device design is that it has a calming visual appearance and any contamination of the filter surface is not obvious.

It is also known to provide extractor hoods with a filter unit which has a closed airtight underside and on the sides of which filter surfaces are provided. Such a filter unit is for example in EP 1 798 482 A2 described. In this hood, the filter unit is brought from a rest position in which closes the bottom of the filter unit, the suction opening of the hood in an operating position. In the operating position, the side surfaces of the filter unit, through which vapors and fumes can reach the inside of the extractor hood and can be cleaned on filter surfaces, are accessible to fumes and vapors which flow to the extractor hood. A disadvantage that brings such a known filter unit with it, is the required height of the filter unit. In order to be able to provide a sufficiently large filter surface over which vapors and fumes can be freed of impurities, the filter unit must have a large height. The visual appearance of the extractor device in the operating position of the filter unit is thereby significantly deteriorated. In addition, the sight hood of the hood, which is also referred to as Wrasenschirm or sight screen and in which the filter unit must be taken in the rest position, also have a sufficient height. As a result, the overall impression of the extractor hood is deteriorated. Finally, the weight of the filter unit is considerable due to the required high altitude. The extractor also needs to move the entire filter unit to achieve the desired filter performance. Thus, the demands on the attachment and movement mechanisms by which the filter unit is held and moved are increased.

The object of the present invention is therefore to provide an extractor hood with which, on the one hand, a sufficient filter surface is available in the operating position and, on the other hand, offers increased flexibility with regard to the design possibilities of the extractor hood.

The invention is based on the finding that this object can be achieved by the provision of movable covers for air passage surfaces of the extractor hood, wherein by means of the covers the filter surfaces available for the purification of fumes can be optimized.

According to a first aspect, the object is therefore achieved by a vapor extraction hood which has at least one air passage surface and at least one cover which is assigned to at least one air passage surface. The extractor hood is characterized in that the cover is movable relative to the air passage surface, at least partially received in a rest position on a receptacle and the air passage surface closes and releases an edge gap in an operating position and that the edge of the cover is chamfered so that the cover tapers in the direction of the air passage area.

According to the invention, the extractor hood can be an eating utensil, for example an island fair or a wall fairing. Furthermore, the hood can also be a recirculating hood of another form. As air passage surfaces are referred to in the context of the invention, the areas of the hood over which Vapors and steams can enter the inside of the hood or escape through the cleaned air from the hood. Preferably, therefore, several air passage surfaces are provided on the hood. These air passage surfaces may adjoin one another, but may also be spaced apart.

The cover of the extractor hood according to the invention is arranged so that it is associated with an air passage area. If the extractor hood has several air passage surfaces, preferably each air passage surface is assigned a cover. Assigned as an air passage surface is understood a cover which covers this air passage area in a rest position, that is closes. The cover is therefore made of an air-impermeable material and preferably has the shape of a plate or a sheet. Closure is understood in the context of the invention to cover the respective air passage surface, by the entry of fumes and vapor is prevented in the hood. In addition, the closure prevents leakage of odors and air from the cooker hood. The latter is particularly important in so-called exhaust hoods, since in these hoods the interior of the hood is connected to the environment and thus air can enter from outside into the room in which the hood is operated. Furthermore, by covering the air passage area both in the operating position and in the rest position largely obscured the view of behind the cover filter and thus improves the visual appearance. Finally, an extractor hood, in which the air passage area or the air passage surfaces are closed in a rest position, has the advantage that the surfaces of the extractor hood can be easily cleaned.

By the hood according to the invention, the cover is arranged to be movable to the air passage surface, it can be moved independently of a filter element, which may be provided on the air passage surface, and brought into a desired position. The cover is preferably moved so that it lies after moving from the rest position at a distance from the air passage surface. By moving the cover relative to the air passage surface from the rest position to an operating position, an edge gap, also referred to as edge suction gap or edge outlet gap, is defined. Approved. Via this marginal gap, fumes and vapor can reach the air passage surface and purified air exiting the extractor hood can enter the environment from the air passage surface. The edge gap consists between the edge of the cover and the receptacle, in which the cover is at least partially received in the rest position. The recording can be formed by a frame or by other components of the hood.

The movement of the cover or covers is preferably a movement perpendicular to the respective air passage surface to which it is associated. This means that, for example, a flat cover in the operating position is parallel to a planar filter which forms the air passage surface. The advantages of such a vertical movement of the cover is that a uniformly wide edge gap is formed at the edge.

In contrast to the prior art, in the present invention, moreover, only the movement of the cover is required to put the extractor hood in an operating state. The movement of an entire filter unit, as is necessary in the prior art, can be dispensed with in the present invention.

In addition, in the extractor hood according to the invention according to the first aspect, the edge of the cover is beveled towards the air passage surface, the flow conditions in the hood can be optimally adjusted and in particular the filter surface, which preferably forms the air passage surface, can be used efficiently. As a beveled edge, an edge of the cover is referred to in the context of the present invention, the edge surface is inclined to the outside of the cover and in particular is inclined inwards. As a result, the cover tapers from its outer side in the direction of the air passage surface, which is associated with these. In particular, the length of the edge of the cover on the outside of the cover is longer than the length of the edge on the inside thereof. The outside is the side of the cover, which faces away from the air passage surface in the mounted state. The inside is the side of the cover, which faces the air passage area in the mounted state. The edge of the inside of the cover according to the present invention defines a smaller area than the edge of the outside of the cover. The edge of the cover on the outside is in Also referred to hereinafter as the outer edge of the cover and the edge of the cover on the inside is also referred to as the inner edge.

Preferably, all sides of the edge of a cover are chamfered. In this case, the cover has a conical shape or a trapezoidal cross section, wherein the smaller area represents the inside.

By the inclined to the air passage surface edge of the cover, an edge gap along the edge of the cover is released even with a small displacement of the cover perpendicular to the air passage surface. This is particularly advantageous in a cooker hood, in which the outside of the cover in the rest position flush with a frame or other component of the hood and forms a flat outer surface of the hood. In this case, in a cover in which the edge is perpendicular to the outside of the cover, a displacement of the cover by an amount corresponding to the thickness of the cover would have to take place before an air inlet or air outlet along the edge of the cover is possible. In contrast, in the extractor hood according to the invention according to the first aspect, a smaller displacement of the cover is sufficient. This effect occurs regardless of how the shape of the receptacle in which the cover is received in the rest position, is designed. This means that even with a recording with vertical walls, a slight shift of the cover to release the marginal gap is sufficient.

Another advantage of the bevelled edge is that when moving the cover from the operating position to the rest position, the cover is centered in the receptacle provided for it. In particular, this effect is achieved with a cover in which at least two sides, preferably all sides, of the edge are chamfered. As a result, tilting of the cover when moving from the operating position to the rest position, which may occur in a cover with a vertical edge, can be avoided.

Finally, the flow of the air passage area, which is usually a filter surface, optimized. By the inclined or beveled edge of the cover is entering through the edge gap Wrasen directed towards the air passage area, in particular in the direction of the center of the area. Thereby, the entire covered by the cover at rest filter surface can be used to clean the Wrasens.

According to a second aspect, the present invention relates to an extractor hood having at least one air passage surface and at least one cover associated with at least one air passage surface. The extractor hood is characterized in that the cover is movable relative to the air passage surface, closes the air passage area in a rest position and releases an edge gap in an operating position and that at least one air passage surface is an air outlet surface for discharge of purified air from the extractor hood.

Features of the extractor hood of the second aspect that are consistent with the features of the extractor hood of the first aspect will not be discussed again in detail. For these features, the functions and benefits described above apply accordingly. However, unlike the extractor hood of the first aspect, the extractor hood of the second aspect does not necessarily provide a bevelled edge of the cover. However, in this aspect, at least one of the air passage surfaces, which can be closed by a cover, an air outlet surface for purified air. As purified air is described air, which has been freed by a filter material of odors and optionally other impurities.

By arranging a movable cover on an air outlet surface, which is also referred to below as the air outlet surface, the flow conditions can be optimally adjusted in a so-called recirculation hood. In addition, the size of the air outlet surface that is available in the operating state can be maximized. In particular, can be omitted from the extractor hood on the air outlet surface during operation of the hood by moving the cover over the edge gap cleaned air. By the air outlet over the edge region of the cover, a targeted delivery of purified air is possible. In addition, a sufficient cleaning of the air is ensured by the movement of the cover, since the entire concealed in the rest position of the cover air outlet surface can serve as a filter surface. At the air outlet surface is preferably an odor filter, For example, an activated carbon filter or a filter element in which the odors are removed, for example by electrostatic action from the air. In addition, as the purified air escapes across the edge gap, the airflow path along the odor filter is lengthened, thereby optimizing the cleaning of the air of odorants.

Another advantage of the extractor hood according to the second aspect of the invention is that air outlet surfaces are usually provided at the top of the hood. By these air outlet surfaces are closed in the rest position by covers, the contamination of the air outlet surfaces is prevented for example by dust deposits. As a result, clogging of the openings in the air outlet surface is prevented, thereby improving the flow conditions in the hood during operation.

According to a preferred embodiment, also in the extractor hood according to the second aspect of the invention, the edge of the cover is chamfered so that the cover tapers in the direction of the air passage surface. If, in addition to the cover of the air outlet surface, a cover on an air inlet surface is also provided in the case of this extractor hood, the rim is preferably also bevelled in this case. The advantages of this embodiment of the cover have already been described with respect to the extractor hood according to the first aspect and apply correspondingly to the extractor hood according to the second aspect. In particular, in the case of a cover which has a beveled edge on an air outlet surface, the air duct can be improved even after passing through the air outlet surface. Thus, the air streams emerging from the edge gap are discharged in directions which are directed away from each other. As a result, turbulence or other negative influence on the exiting air and a backlog caused thereby at the air outlet surface can be prevented.

Preferably, the chamfered edge of the cover is in the rest position on a slope of the receptacle for the cover of the hood on. In this case, the inclination of the slope on the receptacle preferably corresponds to the inclination of the beveled edge of the cover. As a result, when the cover is in the rest position, a reliable closing the Air passage area ensured. In a receptacle having vertical walls, the closing of the air passage surface is only along the outer edge of the cover, which abuts against the receptacle. If, however, the walls of the receptacle are inclined in accordance with the slope of the bevelled edge, then the cover over the entire edge in contact with the receptacle and can thus ensure an airtight closing of the air passage area.

According to one embodiment, the receptacle is at least partially formed by a part of the beveled edge of another cover. In this case, in the rest position, the edges of the covers abut each other. In this embodiment, the air passage surfaces to be closed by the covers are offset from each other. For example, an air passage area on the underside of the hood and another air passage area on the side of the hood. The advantage of this embodiment is that the filter area that can be used in the operating position of the covers is maximized. For example, in the embodiment where the receptacle is formed by a fixed frame, the area where the frame is provided is not available for the air inlet or outlet. If, however, the receptacle for a cover at least partially formed by the edge of another cover, is in the operating position, the area, the further cover for the air inlet and outlet available because the other cover preferably in the operating position at a distance to the this associated air passage area is located.

According to one embodiment, both the extractor hood of the first and the second aspect of the invention, forms the outer edge of the cover in the rest position, an edge of the hood. The advantage of this embodiment is that on the side of the hood, on which the cover is provided, the surface of the extractor hood is formed solely by the cover itself. Since this is preferably a plate or a sheet, the visual appearance of this side of the hood is calmed and improves the cleaning. A slot which is present in an arrangement in which the cover is enclosed in a frame, does not occur in this embodiment. The inclusion for the cover is at a cover with a vertical edge formed in this embodiment by the walls of the hood. But particularly preferably, the edge of the cover is chamfered in this embodiment. In this case, there is no slot at the sides of the hood to which the cover is provided. This is located on the edge of the hood and thus does not catch the user's eye. In addition, the cleaning of the hood is simplified.

The air passage area, which is associated with a cover, can according to the invention represent an air inlet surface or an air outlet surface. According to a preferred embodiment, at least one air passage surface is an air inlet surface and another air passage surface is an air outlet surface. As a result, all the air passage areas required for the operation can be released by the covers according to the invention in the operating position of the covers in a forced-air hood and in the rest position of the covers the cooker hood is completely closed. If, in this embodiment, the covers have a beveled edge to the respective air passage surface, a particularly good flow behavior is set in the extractor hood and the filter surface is maximized. In the case of the air inlet surface, the bevel serves to guide the sucked-in steam in the direction of the air inlet surface. In the air outlet surface, the exiting purified air is directed away from the air outlet surface and in particular a turbulence of the leaked air can be prevented with air flows from other parts of the edge gap.

The cover, in particular the cover with bevelled edge can be arranged according to the invention at the top, bottom and / or on the side surface of the hood. This can maximize the air passage area available in the operating position. In particular, due to the bevelled edge, a cover can also be provided on the side surfaces of the extractor hood and reliably brought from the operating position to the rest position and centered there in a receptacle provided.

According to one embodiment, both the extractor hood of the first aspect and of the second aspect of the invention, the extractor hood has a View screen and at least one cover is disposed on an air passage surface at the top and at least one cover on an air passage surface of the underside of the screen of the hood. In this embodiment, the hood is a dining, which can be operated in the recirculation mode. The air passage surface at the top of the screen is here an air outlet surface for purified air. The air passage surface at the bottom, however, represents the air inlet surface for the suction of vapors through the covers the entire screen can be closed, thus improving the visual appearance and cleanability of the hood become.

Preferably, the air passage surface, which is associated with a cover, a filter surface in which one or more filter elements are arranged. In the case of air passage surfaces, which represent air inlet surfaces, a fat filter, for example in the form of an expanded metal filter, is preferably used as the filter here. In the case of air passage surfaces which represent air outlet surfaces, the filter used is preferably an odor filter, for example in the form of an activated carbon filter. By using the covers according to the invention, the air passage area available in the operating state can be maximized. By providing filters in these areas, this also maximizes the filter area. This is of particular importance in particular for circulating air hoods, since the cleaning of the air of odorous substances can only be ensured with a sufficient size of the area over which the air can come into contact with the odor filter. If the area is too small, the thickness of the odor filter must be increased, which increases the demands on the fan of the extractor hood and increases the noise level. With the extractor hood according to the invention this disadvantage is eliminated.

According to one embodiment, the device outside of the hood is formed exclusively by covers for air passage surfaces. In this embodiment, the hood represents a recirculation hood. This may for example have the shape of a cuboid or cube. However, other forms such as a circular cylinder are possible. In a cube, the underside is formed by a cover, which preferably covers an air inlet opening with a grease filter. The sides of the cube can be formed by covers, which in its lower part an air inlet surface and cover in its upper part an air outlet surface. These adjoining air passage surfaces are determined by the filter provided therein and the air flow within the hood. At the top, a cover for a further air outlet surface may be provided. In this embodiment, all sides of the cube are thus available as filter surfaces and the size of the extractor hood can be minimized. In this embodiment, the covers are designed with bevelled edges, so a frame at the edges of the cube is not required. Thus, the cube in the resting position receives a particularly calm optical appearance.

According to the invention, the cover can be made of metal, in particular of sheet metal, or of glass, in particular of a glass plate. In the latter case, for example, a user interface, in particular operating elements or lighting can be integrated in the cover. In the case of metal covers, on the other hand, the lighting can be provided, for example, in the interior of the extractor hood, and the light can escape through the latter when the edge gap is opened.

Preferably, the cover or the covers are mounted so that they can be moved in a direction perpendicular to the air passage surface. By this movement, a uniform edge gap between the cover and the receptacle can be formed on the edge of the cover.

According to the invention, the movement of the cover can take place manually, by a motor, electrically or mechatronically. If several covers are provided they can be moved individually or together. For example, a fixing movement mechanism can be used, in which by a first application of a compressive force, a holder is released and the cover is brought, for example by means of spring force from the rest position to the operating position. Upon application of a further pressure force on the cover in the operating position, the holder of the cover is then brought to its original position and the cover is held in the rest position. This attachment movement mechanism is also referred to as a push-push principle. Furthermore, it is for example possible a Movement mechanism to use, which includes a magnetic switch and a spring.

According to a preferred embodiment, the cover or the covers are mounted on the hood so that they can be moved by means of an electrical control between the rest position and the operating position. The electrical control can be integrated into the control of the extractor hood or connected to it. As a result, for example, when switching on the fan of the hood or when selecting a specific fan level, the displacement of the cover or the covers are effected in the operating position.

Features and advantages described with respect to an extractor hood according to the first aspect of the invention apply as far as applicable to an extractor hood according to the second aspect of the invention and vice versa.

Figuren 1a, 1b:

schematische Perspektivansichten einer ersten Ausführungsform einer Dunstabzugshaube gemäß der vorliegenden Erfindung im Ruhezustand und im Betriebszustand von unten;

Figur 2:

eine schematische Perspektivteilansicht der Oberseite der ersten Ausführungsform der Dunstabzugshaube nach Figur 1;

Figur 3:

eine schematische Perspektivteilansicht der Unterseite der ersten Ausführungsform der Dunstabzugshaube nach Figur 1;

Figur 4:

eine schematische Perspektivansicht einer zweiten Ausführungsform einer Dunstabzugshaube gemäß der vorliegenden Erfindung im Betriebszustand; und

Figuren 5a, 5b:

schematische Schnittansichten der zweiten Ausführungsform nach Figur 4 entlang der Schnittlinie A-A im Ruhezustand und im Betriebszustand.

The invention will be described again below with reference to the accompanying figures. Show it:

FIGS. 1a, 1b:

schematic perspective views of a first embodiment of an extractor hood according to the present invention in the idle state and in the operating state from below;

FIG. 2:

a schematic partial perspective view of the top of the first embodiment of the hood after FIG. 1 ;

FIG. 3:

a schematic perspective partial view of the underside of the first embodiment of the hood after FIG. 1 ;

FIG. 4:

a schematic perspective view of a second embodiment of an extractor hood according to the present invention in the operating condition; and

FIGS. 5a, 5b:

schematic sectional views of the second embodiment according to FIG. 4 along the section line AA in the idle state and in the operating state.

In FIG. 1a is a schematic perspective view of a first embodiment of an extractor hood 1 according to the present invention shown in the resting state. In this exemplary embodiment, the extractor hood 1 is a dining table which has a viewing screen 10 and a chimney 11 extending above the viewing screen 10. In the bottom of the screen 10, a cover 12 is provided in the rest position of the hood 1. This is arranged in the embodiment shown at a distance from the lateral edges of the viewing screen 10, so that the cover 12, a frame 13 is made. The frame 13 serves as a receptacle 40 for the cover in this embodiment.

In particular, in the illustrated embodiment, the cover 12 is completely received in the receptacle 40, that is the frame 13. In the in FIG. 1a shown rest state, the outside of the cover 12 is flush with the underside of the frame 13, that is forms a plane. Between the cover 12 and the frame 13 is only a narrow slot.

If the cover 12 in the in FIG. 1b brought shown operating state, the cover 12 is moved parallel to the screen 10 down. This creates between the cover 12 and the frame 13, an edge gap 14. In addition, the cover 12 in this state to an air inlet surface 50, which is bounded by the frame 13, spaced. In the air inlet 50, which in the FIG. 1b can only be seen through the edge gap 14, a filter element, in particular a surface filter is arranged. As it turned out FIG. 1b can be seen, the edge 121 of the cover 12 is chamfered. The outside of the cover 12, which is in the FIG. 1b facing down, this is larger than the inside of the cover 12, which faces the air inlet surface 50. Thus, the flat cover 12 has a trapezoidal cross section and has the shape of a flat obelisk.

If the hood 1 is not operated, then either automatically or manually, the cover 12 from the in FIG. 1b shown operating position is moved upward until it is completely received in the frame 13 and so the idle state, the in FIG. 1a shown is restored. In addition to the cover 12 at the bottom of the viewing screen 10 is in the in FIG. 1 embodiment shown also in the top of a cover 22 is provided (see FIG. 2 ). This top cover 22 also has a bevelled edge 221, through which the cover 22 also has a trapezoidal cross-section. The upper cover 22 does not extend over the entire upper side of the viewing screen 10. In particular, the cover 22, like the lower cover 12, terminates at a distance from the edge of the viewing screen 10. Thus, a frame 23 also exists on the upper side of the viewing screen 10. This serves as a receptacle 40 for the upper cover 22. In addition, the upper rectangular cover 22 is provided only laterally to the chimney 11. There are, for example, two upper covers 22 provided on the viewing screen 10, which are each arranged laterally to the chimney 11. Below the upper cover 22, an air outlet surface 51 is provided. This is formed in particular by an odor filter.

In the in FIG. 2 shown operating state of the cover 22 is between the frame 23 and the cover 22, an edge gap 24. About this edge gap 24, air that has been cleaned by the underlying filter 22 under the cover, emerge. This air outlet is in FIG. 2 indicated schematically by the arrows.

For the operation of the hood 1 thus the lower cover 12 can be moved down and the top cover 22 upwards, whereby the edge gaps 14 and 24 are released. By a provided in the hood fan (not shown) can be sucked fumes, and as in FIG. 3 shown, enter the extractor hood 1 over the edge gap 14. Due to the oblique edge 121 of the lower cover 12, the vapor is directed towards the overlying the cover 12 filter forming the air inlet surface 51. Here, the filter is flowed obliquely. The vapor guided by the edge of the cover 12 thus flows behind the cover 12 in the direction of the center of the surface of the filter. Thus, air can enter the extractor hood 1 over the entire area bounded by the frame 13.

After the vapor on the filter, which is in particular a grease filter, was freed of grease and other impurities, the thus pre-cleaned air flows into the display screen 10 upwards and reaches the filter, which is provided in the air outlet surface 51 which is bounded by the upper frame 23. This filter preferably constitutes an odor filter, for example an activated carbon filter. The air purified in this way passes through the odor filter to the underside of the upper cover 22 and is conducted along it to the edge gap 24, via which cleaned air can then escape. Since the edge 221 of the upper cover 22 is inclined so that the cover 22 tapers toward the air outlet surface 51, the purified air is directed outside. As a result, a hindrance of the exiting air flows to each other is prevented.

When the extractor hood 1 is not actuated, the upper and lower covers 22, 12 can be brought into the respective rest position, in which they are received in the respective frame 13, 23, and completely close the air inlet surface 50 and the air outlet surface 51. In addition to the existing between the respective edge 13, 23 and the respective cover 12, 22 slot the viewing hood has a continuous flat surface in this state.

In FIG. 4 a further embodiment of the extractor hood 1 according to the invention is shown. In this embodiment, all sides of the hood 1 by covers 12, 22, 32 are formed. The covers 12, 22, 32 are rectangular plates or sheets, wherein at the bottom of a lower cover 12, four side covers 32 are provided on the sides and an upper cover 32 at the top. The extractor hood 1 thus has the shape of a cube. The interior of the cube is formed by a filter block 15, which also has a cube shape. In the filter block 15, the fan (not shown) of the hood 1 is provided.

The construction of the extractor hood is described below with reference to the FIGS. 5a and 5b described in more detail, the schematic longitudinal sectional views of the embodiment of the hood after FIG. 4 along the section line AA show.

The bottom 151 of the filter block 15 constitutes an air inlet surface and is formed by a grease filter 16. The sides 152 of the filter block 15 are at the bottom by fat filter 16 and in the upper part by odor filter 17th educated. The top side 153 of the filter block 15 constitutes an air outlet surface and is formed by an odor filter 17. It is understood that in the FIGS. 5a and 5b shown division of the sides 152 of the filter block 15 may also have other conditions. For example, the odor filter 17 occupy a greater length than the half of the height of the filter block 15 shown in the figures. It is also possible according to the invention that the entire sides 152 of the filter block 15 are formed by odor filter 17.

In the in FIG. 5a shown rest state of the hood 1, the filter block 15 is completely covered by covers 12, 22, 32. The covers 12, 22, 32 each have bevelled edges 121, 221, 321. The inclination of the edges 121, 221, 321 of the individual covers 12, 22, 32 are 45 °. This angle is between the outer side 12, 22, 32 of the respective cover and the chamfered edge 121, 221, 321. In the rest state, the covers 12, 22, 32 abut each other, thus forming a closed cube. Due to the bevelled edges 121, 221, 321 of the covers 12, 22, 32, the outer side of the cube consists exclusively of the outer sides of the covers 12, 22, 32. The abutment of the edges 121, 221, 321 will be described by way of example with reference to the lower cover 12 and applies to the other covers 22, 32 accordingly.

The edge 121 of the lower cover 12 abuts in the rest position on the lower sides of the edge 321 of the side covers 32. By the lower sides of the edge 321 of the four side covers 32 thus a receptacle 40 for the lower cover 12 is formed. The edge of this receptacle 40 has by the edges 321 at an inclination of 45 °. By receiving the cover 12, the edge 121 also has an inclination of 45 °, the receptacle 40 is completely closed.

During operation of the extractor hood 1, the covers 12, 22, 32 are brought into the operating position. This is in the FIGS. 4 and FIG. 5b shown. As in FIG. 4 indicated by the arrows for this purpose, the covers 12, 22, 32 all moved away from the filter block 15. In particular, the covers 12, 22, 32 are displaced perpendicular to the surfaces 151, 152, 153 of the filter block 15. By this movement of the covers 12, 22, 32 arise between the Edges 121, 221, 321 of the covers 12, 22, 32 edge gaps 14, 24, 34, which extend along the edges of the cube.

The air passage surfaces formed by the filters 16, 17 of the filter block 15 are accessible via these edge gaps 14, 24, 34.

Wrasen, which flows against the hood 1 from below, can pass over the edge gaps 14 to the air inlet surface, which is formed by the grease filter 15 on the bottom 151 of the filter block 15, and enter the extractor hood 1. Due to the inclination of the edges 121, 321 of the lower cover 121 and the side covers 32, the vapor is directed from the edge of the cube to the bottom of the filter block 15, thus preventing undesirable passage of the fumes on the sides of the filter block 15. Vapors, which may still reach the side surfaces 152 of the filter block 15 in spite of this targeted guidance, can enter the filter block 15 and therefore the extractor hood 1 through the grease filters 16 in the lower region of the side surfaces 152. Through the odor filter 17 on the sides 152 of the filter block and on the top 153, the air can be further purified and escape through it. After flowing through the odor filter 17, the purified air can escape via the edge gaps 24 and 34.

The movement of the covers 12, 22, 32 can be effected by a mechanism (not shown), such as a gear mechanism, this can in the first embodiment in FIGS. 1 to 3 be provided on the viewing hood 10. According to the second embodiment FIGS. 4 to 5 For example, the mechanism may be attached to or through the filter block 15.

The drive of the movement mechanism may be mechanical or electrical in nature. The movement mechanism may, for example, be connected to the control of the extractor hood 1, in particular the control of the fan. If the extractor hood 1 is turned on, the covers 12, 22, 32 are moved from the rest position into the operating position. A stepped extension of the covers 12, 22, 32 is possible. For example, at a low blower level of the fan of the hood 1, the covers 12, 22, 32 are moved away from the respective air passage area by a smaller amount than at a higher blower level.

Although the invention has been described essentially with reference to a horizontally arranged extractor hood with horizontal viewing hood, the invention also includes cooker hoods, which are, for example, vertically aligned or hood with a diagonally aligned to the horizontal viewing hood. Other forms of extractor hood according to the second embodiment are possible. For example, the hood may have the cross section of a prism having more than the four side walls shown.

The invention is also not limited to the embodiments shown with respect to the arrangement of the individual components of the extractor hood 1. Thus, for example, the covers may be accommodated in a viewing hood so that they partially protrude in the rest position relative to the underside and the top of the viewing hood.

With the present invention, an improvement of the space efficiency and the function is achieved in hoods with hidden filters. In contrast to the prior art, the design possibilities of the designer are not impaired in the present invention, since the covers used for optical lamination of the filter elements requires only a small space. The covers that hide the filter elements are inventively designed lowered. In the idle state, the cover is preferably arranged flush with the lower edge or to another fixed surface of the hood. This facilitates cleaning of the extractor hood and optimizes the optical lamination of the filter elements.

The present invention provides variable ventilation. In particular, a hidden Randabsaugung or a hidden Umluftauslaß. The preferred conical edge shape of the cover closes in the off state, an equally shaped abutment on the hood side. In this position, only one groove is visible. In operation, the filter cover opens away from the device and gives the circulating oblique gap of the Randabsaugung free over which the vapor can flow.

The present invention can be applied both on the underside of the device even with inclined underside of the device or lateral surfaces for Randabsaugungszwecken, or to let flow out again on the top of the device to purified air in the recirculation mode of the hood again. From the present invention, therefore, any mixed forms are covered to make the air circulation optimal.

The covers are preferably removable or hinged to allow replacement of filters in the air passage surfaces.

The gap openings, that is to say the edge gaps, can be selected such that they run within device surfaces or else run in the edge region of the device surfaces, the surfaces being mitred. In the latter embodiment, it is possible in the off state of the hood to produce a completely closed cuboid or the like, which releases the air inlet and outlet surface only after switching by moving the device surfaces and thus the device can be seen only as an extractor hood.

The present invention has a number of advantages. On the one hand, the extractor hood according to the invention provides a visually calmed appearance and thereby gives the hood a livable character or even a furniture character. In addition, a better cleanability can be achieved by the reduction of the size of the edge gaps, which is possible in the extractor hood according to the invention, at least when switched off.

LIST OF REFERENCE NUMBERS

1

Hood

10

viewscreen

11

fireplace

12

lower cover

121

bevelled edge

13

frame

14

marginal gap

15

filter block

151

bottom

152

pages

153

top

16

grease filter

17

odor filter

22

top cover

221

bevelled edge

23

frame

24

marginal gap

32

lateral cover

321

bevelled edge

33

frame

34

marginal gap

40

admission

50

Air inlet area

51

air discharge

Claims (14)

An extractor hood having at least one air passage surface (50, 51, 151, 152, 153) and at least one cover (12, 22, 32) associated with an air passage surface (50, 51, 151, 152, 153) characterized in that the cover (12, 22, 32) is movable relative to the associated air passage surface (50, 51, 151, 152, 153), is at least partly received on a receptacle (40) in a rest position and the associated air passage surface (50, 51, 151, 152, 153) closes, in an operating position an edge gap (14, 24, 34) releases and that the edge (121, 221, 321) of the cover (12, 22, 32) is chamfered so that the Cover (12, 22, 32) in the direction of the associated air passage surface (50, 51, 151, 152, 153) tapers. An extractor hood having at least one air passage surface (50, 51, 151, 152, 153) and at least one cover (12, 22, 32) associated with an air passage surface (50, 51, 151, 152, 153) characterized in that the cover (12, 22, 32) is movable relative to the associated air passage surface (50, 51, 151, 152, 153), is at least partly received on a receptacle (40) in a rest position and the associated air passage surface (50, 51, 151, 152, 153), in an operating position an edge gap (14, 24, 34) releases and that at least one air passage surface (50, 51, 151, 152, 153) an air outlet surface (51, 152, 153) for exit of purified air from the extractor hood (1). Extractor hood according to claim 2, characterized in that the edge (121, 221, 321) of the cover (12, 22, 32) is chamfered so that the cover (12, 22, 32) in the direction of the associated air passage surface (50 , 51, 151, 152, 153) tapers and the extractor hood has a receptacle (40) on which the cover (12, 22, 32) is at least partially accommodated in the rest position. Extractor hood according to one of claims 1 or 3, characterized in that the bevelled edge (121, 221, 321) of the Cover (12, 22, 32) in the rest position at a slope on the receptacle (40) for the cover (12, 22, 32). Extractor hood according to one of claims 1, 3 or 4, characterized in that the receptacle (40) for a cover (12, 22, 32) at least partially by a portion of the chamfered edge (121, 221, 321) of a further cover (12 , 22, 32) is formed. Extractor hood according to claim 1, 3, 4 or 5, characterized in that the outer edge of the cover (12, 22, 32) in the rest position forms an edge of the extractor hood (1). Extractor hood according to one of claims 1 to 6, characterized in that the air passage surface (50, 51, 151, 152, 153) an air inlet surface (50, 151, 152) and / or an air outlet surface (51, 152, 153). Extractor hood according to one of claims 1 to 7, characterized in that the cover (12, 22, 32) on the top, bottom and / or on the side surface of the extractor hood (1) is arranged. Extractor hood according to one of claims 1 to 8, characterized in that the extractor hood (1) comprises a viewing hood (10) and at least one cover (22) on an air passage surface (51) on the upper side and at least one cover (12) on an air passage surface (50) is arranged on the underside of the viewing screen (10). Extractor hood according to one of claims 1 to 9, characterized in that the air passage surface (50, 51, 151, 152, 153) constitutes a filter surface. Extractor hood according to one of claims 1 to 10, characterized in that the device outside of the extractor hood (1) exclusively by covers (12, 22, 32) for air passage surfaces (50, 51, 151, 152, 153) is formed. Extractor hood according to one of claims 1 to 11, characterized in that the cover (12, 22, 32) made of metal, in particular of sheet metal, or of glass, in particular of a glass plate exists. Extractor hood according to one of claims 1 to 12, characterized in that the cover (12, 22, 32) is mounted so that it can be moved in a direction perpendicular to the air passage surface (50, 51, 151, 152, 153). Extractor hood according to one of claims 1 to 13, characterized in that the cover (12, 22, 32) is mounted on the extractor hood (1) that it can be moved by means of an electrical control between the rest position and the operating position.

Images