DE102011007203A1 - Arrangement for blowing out an exhaust air stream - Google Patents

Abstract

An exemplary embodiment of an arrangement for blowing out an exhaust air flow comprises a housing cover (100) with a blow-out area (140) and a filter holder (360), which is arranged at a downstream end of an air duct for guiding the exhaust air flow and is sealed off from the air duct so that the Exhaust air flow essentially the. Passes filter holder (360) along a flow direction (320), the housing cover (100) being designed to be opened and thereby detaching from the filter holder (360). The housing cover (100) is sealed off from the filter holder (360) via at least one surface (310, 400) of the housing cover (100) and the filter holder (360) in a closed state of the housing cover (100), so that the exhaust air flow from the air duct reaches the blow-out area (140), the surfaces (310, 400) of the housing cover (100) and the filter holder (360) facing each other in the closed state and being arranged essentially parallel to the flow direction (320).

Description

Embodiments relate to an arrangement for blowing out an exhaust air stream, for example from a household or industrial appliance, such as a vacuum cleaner.

For cleaning surfaces and other surfaces of dust and contaminants devices are often used to suck the surface concerned. In these, the contaminated with dirt and impurities, which is sucked from the surface to be cleaned, sucked by a compressor or a blower via an intake manifold and freed via a filter assembly with one or more filter elements of the dirt and impurities. On the output side, the filter elements provided in front of the blower ejected in a more purified form. For this purpose, one or more further filter elements downstream of the fan can be provided. This air or gas stream, also referred to as the exhaust air stream, is then blown into an environment of the relevant extraction device.

For cleaning and maintenance of the corresponding device, it is often advisable to design a housing of the device such that it can be opened in order, for example, to clean or replace the blower upstream of the blower or downstream filter elements.

The DE 102 11 649 A1 refers to a device for floor cleaning with a device housing, an internal motor fan and a housing cover, which accommodates a carrier with a filter element. The carrier of the filter element slips when. Inserting the carrier from above by means of guideways and a gravity-driven transport in the end position in the housing cover. The device for floor cleaning shown in this document discloses an arrangement in which the filter is fixed in the housing. Here, the carrier with the filter element on a circumferential sealing frame, so spend a force when closing the housing. is.

The DE 35 17 329 A1 refers to a vacuum cleaner with a disc filter, which is arranged on a hinged at one side edge support grid. The disc filter overlaps in the operating position provided in the device housing flow channel transversely to a flow direction is sucked by a motor fan on. In order to achieve a secure mounting of the disc filter in a simple structure, the support grid is hinged to a transverse to the flow direction, fixed to the device housing support grid and inserted the disc filter between the two grids. However, the arrangement described in this document does not produce an air duct, which allows a safe guidance of the air flow out of the device housing out.

The DE 10 2004 042 237 A1 refers to a vacuum cleaner with a fine dust filter in the exhaust air flow of the suction fan, wherein the fine dust filter is arranged interchangeable in a filter cassette space on the vacuum cleaner with the interposition of a sealing element. For this purpose, a lip seal in the intermediate space of the lateral edge of the filter cartridge receptacle and the lateral edge of the fine dust filter is arranged circumferentially in the vacuum cleaner. In the vacuum cleaner described in this document, therefore, when closing the lid a considerable force must be exerted against the lip seal to close the housing.

Based on this, there is therefore a need to provide an arrangement for blowing out an exhaust air flow, in which an exhaust air flow is guided in a closed position of a housing cover defined from the housing, the arrangement should allow closing the housing cover with the least possible effort to a to allow a more secure closing of the housing cover.

This requirement is met by an arrangement for blowing out an exhaust air stream according to claim 1 and a device for sucking a surface according to claim 12.

An arrangement for blowing off an exhaust air stream according to an embodiment comprises a housing cover with a blow-out area and a filter holder which is arranged at a downstream end of an air duct for guiding the exhaust air flow and is sealed relative to the air duct, that the exhaust air flow substantially the filter holder along a flow direction happens. The housing cover is designed to be opened and thereby detach itself from the filter holder, wherein the housing cover is sealed to the filter holder via at least one surface of the housing cover and the filter holder in a closed state of the housing cover, so that the exhaust air flow from the air guide channel in reaches the blow-out area. The surfaces of the housing cover and the filter holder are in the closed state facing each other and arranged substantially parallel to the flow direction.

A device for extracting a surface according to an embodiment comprises an intake manifold, which in a dust chamber and a blower having a flow inlet coupled to the dust space, the blower being configured to generate at the intake manifold an air flow leading from the intake manifold to the dust space, the blower being further adapted to abut Flow output of the fan to deliver the air flow as exhaust air flow to an air duct. The device further comprises an arrangement described above for blowing off the exhaust air flow according to an embodiment, wherein the discharge area is covered by a cover with a discharge opening, so that the exhaust air flow leaves the device through the exhaust opening. The fan may include a motor for driving the fan. Motor and blower can also be connected spatially separated via one or more waves with an optional gear.

Embodiments here are based on the finding that, on the one hand, an arrangement for blowing out the exhaust air flow, in which the entire exhaust air or the entire exhaust air flow can be supplied via a closed air duct to a blow-out region of the housing cover in a closed position or a closed state of the housing cover by is provided at the downstream end of the air duct of the filter holder and against the. Housing cover and its outlet area is sealed. This ensures that the entire blow-out air or the complete exhaust air flow can essentially escape only via the blow-out area. Characterized in that the sealing of the housing cover and the filter holder in the closed state by at least one surface of the housing cover and the filter holder is achieved, which face each other and are arranged substantially parallel to the flow direction of the exhaust air flow through the filter holder, it is possible To close the housing cover with less force, so as to ensure a safer closing (eg locking) of the housing cover with a housing lower part. As a result, therefore, a gap seal between the housing cover and the. Filter holder formed, which is also referred to as tongue and groove seal or tongue and groove joint.

In an arrangement according to an embodiment, the housing cover and the filter holder may each have a further surface facing each other in the closed state and in the. Are arranged substantially parallel to the flow direction, wherein the surfaces and the other surfaces are arranged on one side of the filter holder along a straight line which is perpendicular to the surfaces and the other surfaces, so that flowing between the two surfaces of air or gas flow in the Substantially flows between the other surfaces. In this way, the sealing effect can optionally be improved, since now the gap to the seal is no longer formed only by the two surfaces, but also by two other surfaces, which are also facing each other and arranged substantially parallel to the flow direction. In other words, the seal is now formed by a labyrinth seal with a first and a second gap, in which, in contrast to a simple gap seal with only one gap, the first gap formed by the two surfaces and the second gap by the two other surfaces. The surfaces and the further surfaces are in this case arranged such that an air or gas flow, which flows along between the two surfaces, as well as between the other two. Surfaces flows through.

In an arrangement according to an embodiment, the housing cover and the filter holder may be sealed in the closed state substantially circumferentially around the filter holder by one or more surfaces facing each other and arranged substantially parallel to the flow direction. This makes it possible, if appropriate, to improve the sealing of the housing cover to the filter holder by appropriate surfaces are provided substantially circumferentially around the filter holder. In other words, by providing a gap seal or a labyrinth seal, which are provided substantially circumferentially around the filter holder, a sealing effect can be improved.

In an arrangement according to an embodiment, the housing cover and the filter holder in the closed state by the respective one or more surfaces of the housing cover and the filter holder can be positively connected to each other. This may make it possible, if necessary, to mechanically fix the filter holder by the housing cover in an interior of the housing. This may make it possible to implement a device comprising the arrangement according to an embodiment, possibly easier and / or possibly space-saving, since the filter holder and the housing cover are optionally additionally connected by the respective one or more surfaces positively in the closed state ,

In an arrangement according to an embodiment, a group of components may comprise the filter holder and the housing cover, wherein at least one of the surfaces through a side wall of a component of the group of components and at least one further surface by a web or a Side surface of the other component of the group of components is formed, or wherein at least one surface is formed by a groove in the one component of the group of components and at least one further surface by a web of the other component, wherein the web in the closed state in the Nut engages, or wherein at least one surface of each of the two components of the group of components are formed by a web. The gap seal can in this case be implemented and implemented by a multiplicity of different possible configurations of the two surfaces. The web can in this case for example also be formed by a rib, by a spring, a bung, a bulkhead wall or another wall.

In an arrangement according to an embodiment, a further group of components may comprise the filter holder and the housing cover, wherein a component of the group of components has a sealing lip which is arranged in a direction perpendicular to the flow direction to the one component with respect to the other component further group of components to seal. By providing a further sealing lip, which is arranged in a direction perpendicular to the flow direction, the sealing of the housing cover relative to the filter holder optionally further improved or it can be achieved aerodynamic design, so possibly a larger proportion of the exhaust air flow from the air duct over the Filter holder is guided in the discharge area of the housing cover. In other words, the provision of a corresponding sealing lip may further complicate leakage of the exhaust air between the housing cover and a housing lower part.

In an arrangement according to an embodiment, the housing cover may be sealed to the filter holder on two opposite sides of the filter holder by respectively facing and extending substantially parallel to the flow direction surfaces, wherein the two surfaces of each mutually opposite sides of the filter holder along the Flow direction are offset or differ in terms of their extent along the flow direction. Characterized in that the surfaces are arranged offset on the two opposite sides of the filter holder along the flow direction or differ in terms of their extent along the flow direction, an easier opening and / or closing of the housing cover may be possible.

In such an arrangement according to an embodiment, the housing cover may be pivotable about an axis for opening, and the two opposite sides of the filter holder so extending parallel to the axis. This may in particular be the case when the housing cover is arranged for opening or closing about an axis pivotable or movable and the two opposite sides of the filter holder extend so parallel to the axis.

In an arrangement according to an embodiment of the filter holder may comprise a filter which is arranged in the filter holder, that the exhaust air flow in the. Essentially completely happened. The filter holder can thus be equipped with a filter for filtering the exhaust air flow, in order to achieve an improvement in a purity of the exhaust air flow if necessary. Such a filter may comprise, for example, a porous and / or open-pored material, for example a porous and / or open-pored polyurethane foam (PUR foam). Such a filter can also be designed, for example, as a microfluidic filter, micro-activated carbon filter or HEPA filter (HEPA = High Efficiency Particulate Air Filter = high-efficiency particle air filter).

In an arrangement according to an embodiment, the housing cover may comprise a further filter in the Ausblasbereich, which passes through the exhaust air flow, before the exhaust air flow leaves the housing cover through a blow-out. As a result, if appropriate, a further improvement in the quality of the exhaust air flow can be achieved by providing the further filter in the outlet region. This filter may also serve to reduce operating noise of a surface suction device.

In an arrangement according to an embodiment, the housing cover and the filter holder may be made of a material comprising a plastic, in particular polycarbonate (PC) or acrylonitrile-butadiene-styrene (ABS). This makes it possible to produce the surfaces and optionally other structures, such as a sealing lip, on the one hand with such a dimensional stability, on the one hand, an unwanted mechanical deformation limits, but on the other hand, in the case of touching corresponding components and their components an at least partially mechanical deformation allows to prevent damage to the filter holder and / or the housing cover and in the case of a sealing lip to allow a certain nestling on a counter surface.

In a device for extracting a surface according to an embodiment of the air duct may be closed. As a result, if appropriate, a more targeted exhaust air flow guidance can be achieved, for example, an escape of the exhaust air flow into the dust chamber complicate or prevent. As a result, if necessary, a thermal short circuit can be avoided, in which the exhaust air flow heated by the fan can again reach the input side to the fan, ie to its flow input. In other words, this may optionally be prevented leakage of the exhaust air flow between the housing cover and a lower housing part. It is also possible, if appropriate, to avoid heat short-circuiting, that is to say a repeated suction of the warm blow-out air, and to prevent shielding of heat-sensitive components (eg switches).

In a device according to one embodiment, a first filter may be arranged in the dust space between the intake manifold and the flow inlet of the blower. This may be, for example, a filter bag or another filter. Likewise, one or more further filters, for example microfluidic filters, micro-activated charcoal filters or HEPA filters (HEPA = High Efficiency Particulate Air Filter = high-efficiency particle air filter) can additionally be arranged behind the first filter, ie downstream.

In a device according to an embodiment, the device may be a household appliance or a vacuum cleaner, for example an industrial or household vacuum cleaner.

Exemplary embodiments are explained and described in more detail below with reference to the enclosed figures.

1 shows a plan view of a housing cover according to an embodiment;

2 shows a cross-sectional view through the in 1 shown housing cover;

3 shows an enlarged cross-sectional view of the in 2 shown housing cover together with a filter holder according to an embodiment; and

4 shows a cross section through the in the 1 to 3 shown housing cover with a filter holder and a cover of the blow-out with another filter according to an embodiment.

Before in connection with the 1 to 4 In the context of the present description, reference numerals for objects, structures and other entities are used when referring to the entity in question, several corresponding entities within a single entity Embodiment or within several embodiments or the type of entities concerned is discussed in more detail. This makes it possible to keep the description concise and shorter, since unnecessary repetitions can be avoided, since descriptions relating to one entity can also be applied to other entities in other embodiments, unless explicitly stated otherwise or deriving from the Context results. In contrast, when individual entities are referred to, individual reference numerals based on the corresponding summary reference numerals are used. Entities that occur multiple times in one embodiment or in different embodiments may be identical and / or different with respect to some of their technical parameters. It is thus possible, for example, for several entities to be identical in one embodiment with respect to one parameter, but different in respect of another parameter.

1 shows a plan view of a housing cover 100 according to an embodiment. The housing cover 100 has an intake manifold 110 for an intake pipe or a suction hose, by means of which and optionally an optional further component (eg a suction attachment) a surface to be cleaned can be cleaned by a device for sucking off the surface.

The housing cover 100 also has a locking mechanism 120 on, with which the housing cover at an in 1 Not shown housing lower part latched or otherwise repeatedly releasably mechanically connectable. A recess 130 of the housing cover 100 forms the outlet area 140 the arrangement to blow out the exhaust air flow.

The in 1 shown housing cover 100 also has a first pin 150 and a second pin 160 on that in another recess 170 of the housing cover 100 are arranged and lie on a common line, which is an axis 180 that forms in 1 is shown as a dashed line. The housing cover 100 is around this axis 180 pivotable. The first and the second pin 150 . 160 engage in corresponding blind holes or other recesses of the in 1 not shown housing part, whereby the housing cover 100 over the locking mechanism 120 from an open state to a closed state and vice versa can be brought.

2 shows a cross-sectional view of the housing cover 100 along an in 1 drawn cutting plane 190 , The presentation of the 2 Here is a semi-perspective cross-sectional view in which the in 2 hatched areas in the cutting plane 190 are arranged, while non-hatched areas lie in a plane that is to the cross-sectional plane 190 is offset to the rear.

2 again shows the intake manifold 110 , the first area 200 second area 210 includes that of a transitional area 220 are separated, with the transition region 220 a change in the diameter of the first area 200 and the second area 210 causes. This is an in 1 not shown suction hose or an intake pipe to the intake manifold 110 connected. The second area 210 is coupled via a first filter element, which may be formed for example in the form of a filter bag in the case of a household vacuum cleaner or an industrial vacuum cleaner, with an input of a compressor or a blower. Neither the first filter nor the compressor or the blower are in for simplicity 2 shown.

The locking mechanism 120 is how in 2 shown by a hook 230 formed, the latching or a snap of the housing cover 100 with the likewise in 2 Not shown housing base allows.

In the area of the outlet area 140 shows the case 100 a bulkhead 240 on that a dust room 250 limited, in which the first filter can be arranged, but for ease of illustration in 2 also not shown. The bulkhead 240 is here on a sloping stiffening wall 260 with an outer section 270 of the housing cover 100 mechanically connected. The stiffening wall 260 and another stiffening structure 280 thus allow a mechanically stable arrangement of the bulkhead 240 ,

About a connection structure 290 is a jetty 300 with the bulkhead 240 mechanically connected. As related to 3 is shown in more detail forms. the jetty 300 an area 310 of the housing cover 100 extending along a flow direction 320 extends and seals the in 2 not shown filter holder to the housing cover 100 is used.

2 also shows in the area of the outlet area 140 a boundary wall 330 , in particular in the form of a detail magnification in 3 is still shown. This in turn has a footbridge 340 on, which is another area 350 for illumination of the housing cover 100 forms of the filter holder.

3 shows an enlarged cross-sectional view of the outlet area 140 in a opposite to the in 1 shown cross-sectional plane 190 slightly displaced the cross-sectional plane. So shows, for example 3 in the 2 shown stiffening wall 260 Not. 3 however, shows the bridge 300 as well as the area 310 the jetty trains. Likewise shows 3 the jetty 340 with the wider area 350 ,

Even if in 3 a cover of the outlet area 140 nothing is shown, shows 3 but for the first time a filter holder 360 located at a downstream end of an in 3 Air duct not shown for guiding the exhaust air from an outlet of the compressor or the blower is arranged. The filter holder 360 here has a filter area 370 in which a filter for filtering the exhaust air flow can be used. This filter can be, for example, a porous and / or open-pored material, for example a porous and / or open-pored polyurethane foam (PUR foam).

The filter holder 360 has a groove 380 on, which is designed and arranged such that the web 300 in a closed state of the housing cover 100 in the groove 380 intervenes. During the jetty 300 the area 310 forms, with the help of the filter holder 360 opposite the housing cover 100 is sealed, thus forming a side wall 390 the groove 380 an area 400 of the filter holder 360 that are essentially parallel to the surface 310 the housing cover is arranged, and wherein the surfaces 310 and 400 facing each other. Both surfaces 310 . 400 moreover, are essentially parallel to the in 3 also indicated flow direction 320 arranged and aligned.

Between the surfaces 310 and 400 so forms a gap, which is part of a gap seal, which passes through the groove 380 and the jetty 300 is formed. The jetty 300 is also known as a spring or bung.

The jetty 300 also has another area 410 on, on one of the surface 310 opposite side of the bridge 300 is arranged. The wider area 410 is another side wall 420 the groove 380 opposite, with the other side wall 420 another area 430 for sealing the housing cover 100 compared to the. filter holder 360 forms.

The other surfaces 410 and 430 are in the in 3 shown, closed state of the housing cover 100 facing each other and substantially parallel to each other and parallel to the flow direction 320 arranged. Furthermore they are arranged such that one between the two surfaces 310 . 400 flowing air or gas flow between the other surfaces 410 and 430 essentially flows. In other words, the bridge form the bridge 300 and the groove 380 Not only a gap seal, but also a labyrinth seal with at least two, not along a common line arranged column.

As already described above, the housing cover 100 Furthermore, a boundary wall 330 with a jetty 340 on, with the bridge 340 another area 350 at an opposite end or an opposite side of the filter holder 360 forms. The filter holder 360 in turn has a footbridge 440 on, which is another area 450 forms, that of the further surface 350 of the footbridge 340 facing and parallel to this and parallel to the flow direction 320 is arranged. This again forms between the other surfaces 350 and 450 a gap that is part of a gap seal.

This in 3 shown embodiment of an arrangement for blowing an exhaust air stream further comprises a further web 460 of the filter holder 360 , which is another area 470 forms that of another surface 480 of the footbridge 340 is facing and also substantially parallel to the flow direction 320 is arranged. This also forms between the other surfaces 470 and 480 a gap which is also arranged and formed such that one between the surfaces 350 . 450 flowing air or gas flow between the other surfaces 470 and 480 essentially flows. In other words, the other surfaces form 470 . 480 together with the other surfaces 350 . 450 also a labyrinth seal.

For an additional seal of the filter holder 360 opposite the housing 100 to achieve, the filter holder points 360 a sealing lip 490 on, in a direction perpendicular to the flow direction 320 is arranged. The sealing lip 490 of the filter holder 360 is in the closed state of the housing cover 100 against the bulkhead 240 pressed. This makes it possible to seal the filter holder 360 opposite the housing cover 100 continue to improve. In addition, embodiments can also seal other lips to seal the filter holder 360 and / or the housing cover 100 relative to the respective other component or a completely different component.

As 3 also shows are the surfaces 310 . 400 . 410 and 430 along the flow direction 320 offset and with a greater extent along the flow direction 320 executed, as this is the case of the other surfaces 350 . 450 . 470 and 480 is. The reason for this arises from a comparison of the structures in 3 and the in 1 shown supervision on the housing cover 100 , That's the axis 180 (see. 1 ) on the right in 3 , ie in the direction of the bridges 340 . 440 and 460 arranged so that upon rotation or pivoting of the housing cover 100 around this axis 180 the jetty 300 due to the greater distance from the axis 180 Another way back than the footbridge 340 , Will now the housing cover 100 open, so around the axis 180 pivoted, the housing cover moves 100 in the 3 shown situation on a circular arc to the top right. Due to the use of a plastic with appropriate mechanical properties, such as polycarbonate (PC) or acrylonitrile-butadiene-styrene (ABS), the webs have 300 . 340 on the one hand sufficient dimensional stability to allow the sealing effect, while on the other hand, the choice of material also ensures sufficient flexibility, so that even in the case of touching the webs 300 . 340 and the surrounding structures that cover the surfaces on the filter holder 360 form (eg groove 380 ) damage of the respective webs does not occur. In other words, it allows this different orientation and design of the surfaces 310 . 400 . 410 and 430 on the one hand and 350 . 450 . 470 and 480 on the other hand, easier opening or closing of the housing cover 100 in which the housing cover 100 from the filter holder 360 solves.

In addition, shows 3 another attachment structure 500 , with the help of an in 3 not shown cover of the outlet area 140 mechanically with the housing cover 100 connectable, for example, is latched.

To a flow through the filter holder 360 in the direction of the flow direction 320 to allow, the filter holder points 360 a grid 510 on which the filter area 370 in the direction of the flow direction 320 limited. The grid 510 can be used, for example, as a mechanical stop for the in 3 not shown filter serve. However, in other embodiments, a corresponding grid may also be the filter area 370 against the flow direction 320 limit.

To show in more detail that in which in the 1 to 3 shown embodiment, an arrangement for blowing an exhaust air flow in each case one or more facing each other and substantially parallel to the flow direction 320 arranged surfaces in the closed state substantially at all around the filter holder 360 are arranged, shows 4 a cross-sectional view through the housing cover 100 and the filter holder 360 in a perpendicular to the Cutting plane of 3 extending cross-sectional plane.

Starting from the filter area 370 points the filter holder 360 so on both sides of the in 4 shown section L-shaped side walls 520 . 530 on, each together another footbridge 540 . 550 of the housing cover 100 again two facing each other and substantially parallel to the through-flow direction 320 arranged surfaces form the sealing effect of the filter holder 360 to the housing cover 100 effect in the closed state by forming a gap between the respective surfaces, which would pass through a parasitic air or gas stream.

In addition, the housing cover points 100 also two more bars 560 . 570 on, each one another footbridge 580 . 590 of the filter holder 360 opposite, so that between these in each case faces face each other, which again substantially parallel to the flow direction 320 are arranged. These surfaces also form column, which provides the sealing effect for sealing the filter holder 360 to the housing cover 110 support or generate. The side walls 520 . 530 and their associated further webs 540 . 550 and the respective bars 560 and 570 such as 580 and 590 are again arranged so that a gas or air flow, which flows through the column described above, must also flow through the respective other gap. Accordingly, these structures again form not only gap seals, but labyrinth seals.

In addition, shows 4 a cover 600 the outlet area 140 that about the attachment structures 500 with the housing cover 100 mechanically latched. The cover 600 has several outlet openings 610 through which the exhaust air flow from the outlet area 140 to an environment of the device for aspirating or cleaning a surface of the housing or housing cover 100 can leave. Optionally, this is in the outlet area 140 a filter 620 with the cover 600 mechanically coupled to the type, so this filter 620 the exhaust air flow filter again and possibly an operating noise of the device further reduced. Also this filter 620 For example, it can be embodied as a microfluidic filter, micro-activated carbon filter or HEPA filter (HEPA = High Efficiency Particulate Air Filter), or a porous and / or open-porous material, for example a porous one. and / or open cell polyurethane foam (PUR foam).

While in the embodiments described above, almost all gap seals in the form of. Labyrinth seals are formed, in other embodiments, individual, several or all seals can be designed as a simple gap seals with a single gap. In such a case, if necessary, the implementation of individual webs or an alternative embodiment of side walls can be used.

In the embodiments described above, in the closed state, the filter holder 360 in a plane perpendicular to the flow direction 320 positively with the housing cover 100 connected. As a result, it may be possible to save stiffening structures and other structures that increase mechanical stability (eg ribs).

Here are the two components, ie the housing cover 100 and the filter holder 360 typically gap on the one hand, a slight release of the two components from each other during the opening of the housing cover 100 On the other hand, however, allow or ensure the sealing effect of the relevant gap seals. In different exemplary embodiments, the gap dimension, that is to say a spacing of the respective mutually facing and parallel aligned surfaces may be, for example, in the range of at most 2 mm, in other embodiments not more than 1.5 mm or at most 1 mm. Also, a smaller structural design may be conceivable, for example, if a corresponding mechanical implementation of the mechanism for opening the housing cover 100 is provided. For example, instead of an axis 180 and corresponding pin 150 . 160 the housing cover 100 formed such that this of the filter holder 360 lifted off and not swung away, where appropriate, smaller gaps and. Tolerances are used, so for example gap dimensions below 1 mm or below 500 microns.

Embodiments may thus make it possible to forcibly guide the blow-out air or the exhaust-air flow so that it can only flow out in the region provided for this purpose. There are no additional aids and auxiliary equipment, such. As screws used. Likewise, if possible no screwdrivers or welding devices are needed.

Conventional vacuum cleaners use internal exhaust filter frames and filters. These have the purpose of additionally cleaning the exhaust air. In embodiments, however, a seal between the housing, (blow-out) filter frame and (housing) cover is achieved by gap seals. This can without additional parts such. As screws or seals or sealing elements be implemented. For this filter frame and lid are coupled by means of bulkheads over a labyrinth and seal so the lid when closing off. Thus, if necessary, it can be ensured that the blow-off air only escapes into the area provided for this purpose.

This may provide the advantage that no additional parts such as seals, screws and other means for shielding the heat-sensitive parts (eg, slider, on / off switch, etc.) need to be used. In addition, this solution, also referred to as "airsize solution", may have the advantage that there is no shortage of heat as well as unintentional raising of dust by false air.

In embodiments, with a movable housing cover in the closed position, the entire exhaust air is supplied via a closed air duct to a blow-out area. The entire blow-out air can only escape via the blow-out area. Embodiments can thus allow a powerless closing of the lid or closing the lid with only a small amount of force, so that a safer Deckelverrastung can optionally be guaranteed.

Exemplary embodiments thus typically comprise a blow-out region, a housing cover, blow-out air during operation, an air-guiding duct and a seal via a tongue-and-groove joint or gap seal. Optionally, the blow-out area can be additionally provided with a filter. Also, the seal can be equipped with additional sealing lips. The overlap area of the tongue and groove joints per side can be at different levels. As an alternative to a groove, an L-shaped wall can also be used.

Exemplary embodiments can thus prevent leakage of the blow-out air between the housing cover and the housing lower part, permit further and / or additional filtering of the exhaust air, prevent heat short-circuiting, ie repeated suction of a warm blown air, and / or enable shielding of heat-sensitive components.

Compared to conventional vacuum cleaners can be avoided when closing the lid, a force on the exhaust filter and the filter holder; there the

Sealing effect is achieved via a tongue and groove connection or gap seal, which optionally allows a powerless close the lid. In addition, the filter can be fixed with the filter holder in the housing and does not need to be accommodated in the lid. Embodiments thus allow the formation of a (closed) air duct.

Embodiments can thus allow forced guidance of the blow-out air.

LIST OF REFERENCE NUMBERS

100

housing cover

110

intake

120

locking mechanism

130

recess

140

outlet

150

first pin

160

second pin

170

another recess

180

axis

190

cutting plane

200

first area

210

second area

220

Transition area

230

hook

240

bulkhead

250

dust chamber

260

stiffening wall

270

outer section

280

stiffening structure

290

connecting structure

300

Stege

310

area

320

flow direction

330

boundary wall

340

web

350

additional area

360

filter holder

370

filter area

380

groove

390

Side wall

400

area

410

additional area

420

another side wall

430

additional area

440

web

450

additional area

460

another footbridge

470

additional area

480

additional area

490

sealing lip

500

attachment structure

510

grid

520

Side wall

530

Side wall

540

another footbridge

550

another footbridge

560

web

570

web

580

another footbridge

590

another footbridge

600

cover

610

exhaust vent

620

filter

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The 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

• DE 10211649 A1 [0004]
• DE 3517329 A1 [0005]
• DE 102004042237 A1 [0006]

Claims (15)

Arrangement for blowing out an exhaust air stream with the following features: a housing cover ( 100 ) with a blow-out area ( 140 ); and a filter holder ( 360 ), which is arranged at a downstream end of an air duct for guiding the exhaust air flow and is sealed relative to the air duct, that the exhaust air flow substantially the filter holder ( 360 ) along a flow direction ( 320 ) happens, whereby the housing cover ( 100 ) is formed to be opened, thereby extending from the filter holder ( 360 ) to solve; the housing cover ( 100 ) to the filter holder ( 360 ) over at least one area ( 310 . 400 ) of the housing cover ( 100 ) and the filter holder ( 360 ) in a closed state of the housing cover ( 100 ), so that the exhaust air flow from the air duct into the discharge area ( 140 ); and where the areas ( 310 . 400 ) of the housing cover ( 100 ) and the filter holder ( 360 ) are in the closed state facing each other and substantially parallel to the flow direction ( 320 ) are arranged. Arrangement according to Claim 1, in which the housing cover ( 100 ) and the filter holder ( 360 ) each have a further surface ( 410 . 430 ) facing each other in the closed state and substantially parallel to the flow direction ( 320 ), the surfaces ( 310 . 400 ) and the other surfaces ( 410 . 430 ) on one side of the filter holder ( 360 ) are arranged along a straight line perpendicular to the surfaces ( 310 . 400 ) and the other surfaces ( 410 . 430 ), so that one between the two surfaces ( 310 . 400 ) flowing air or gas stream also substantially between the other surfaces ( 410 . 430 ) flows through. Arrangement according to one of the preceding claims, wherein the housing cover ( 100 ) and the filter holder ( 360 ) by one or more mutually facing and substantially parallel to the flow direction ( 320 ) arranged surfaces in the closed state substantially circumferentially around the filter holder ( 320 ) are sealed. Arrangement according to one of the preceding claims, wherein the housing cover ( 100 ) and the filter holder ( 360 ) are positively connected to each other in the closed state by the respective one or more surfaces of the housing cover and the filter holder. Arrangement according to one of the preceding claims, wherein a group of components the filter holder ( 360 ) and the housing cover ( 100 ), and wherein at least one of the surfaces through a side wall ( 520 . 530 ) of a component of the group of components and at least one further surface by a further web ( 530 . 540 ) or a side face (12) of the other component of the group of components, or at least one face being formed by a groove (14). 380 ) in the one component of the group of components and at least one further surface through a web ( 300 ) of the other component is formed, wherein the web in the closed state in the groove ( 380 ), or wherein at least one surface of each of the two components of the group of components by a web ( 340 . 440 ) are formed. Arrangement according to one of the preceding claims, in which a further group of components support the filter holder ( 360 ) and the housing cover ( 100 ), wherein a component of the group of components has a sealing lip ( 490 ), which in a direction perpendicular to the flow direction ( 320 ) is arranged to further seal the one component relative to the other component of the further group of components. Arrangement according to one of the preceding claims, wherein the housing cover ( 100 ) to the filter holder ( 360 ) on two opposite sides of the filter holder ( 360 ) is sealed by each facing and in substantially parallel to the flow direction extending surfaces, wherein the two surfaces of each mutually opposite sides of the filter holder along the flow direction are offset or in terms of their extent along the flow direction ( 320 ). Arrangement according to Claim 7, in which the housing cover ( 100 ) for opening around an axis ( 180 ) is pivotable, and the two opposite sides of the filter holder ( 360 ) so parallel to the axis ( 180 ). Arrangement according to one of the preceding claims, in which the filter holder ( 360 ) comprises a filter, which in the filter holder ( 360 ) is arranged, that the exhaust air flow substantially completely passes this. Arrangement according to one of the preceding claims, wherein the housing cover ( 100 ) another filter ( 620 ) in the blow-out area ( 140 ), which passes through the exhaust air flow, before the exhaust air flow to the housing cover ( 100 ) through an exhaust opening ( 610 ) leaves. Arrangement according to one of the preceding claims, wherein the housing cover ( 100 ) and the filter holder ( 360 ) is made of a material comprising a plastic, in particular polycarbonate or acrylonitrile-butadiene-styrene. Device for extracting a surface, having the following features: an intake manifold ( 110 ), which is placed in a dust 250 ) opens; a blower with a flow inlet connected to the dust chamber ( 250 ), wherein the blower is designed to be connected to the intake manifold ( 110 ) to generate an air flow, which from the intake manifold ( 110 ) to the dust chamber ( 250 ), wherein the blower is further adapted to deliver at a flow outlet of the blower the air flow as exhaust air flow to an air duct; and an arrangement for blowing out the exhaust air flow according to one of the preceding claims, wherein the blow-out area ( 140 ) through a cover ( 600 ) with an exhaust opening ( 610 ), so that the exhaust air flow through the device through the exhaust port ( 610 ) leaves. Apparatus according to claim 12, wherein the air duct is closed. Device according to one of claims 12 or 13, wherein in the dust space ( 250 ) between the intake manifold ( 110 ) and the flow inlet of the blower, a first filter is arranged. Device according to one of claims 12 to 14, wherein the device is a household appliance or a vacuum cleaner, such as an industrial or household vacuum cleaner.

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