DE202016102469U1 - Suction nozzle with improved fine dust removal - Google Patents

Abstract

Suction nozzle for a vacuum cleaner, comprising a housing (4), a suction channel (6) formed in the housing (4), a suction chamber (7) and a suction mouth (8), wherein in the suction chamber (7) a driven brush body (10 ) is arranged, which has a plurality of filaments (12) and in the housing (4) provided for bearing points (14) is rotatably mounted, characterized in that the brush body (10) has at least one suction channel (34) for discharging particulate matter, wherein the suction channel (34) merges into an elongated inlet opening (22) arranged on the lateral surface of the brush body (10) and is connected to a connecting piece (24) connected in a rotationally fixed manner to the brush body (10), which is cylindrical over at least an axial section Has outer peripheral surface, and wherein the connecting piece (24) at least one of the suction channel (6) branching off secondary suction channel (30) is associated, the one facing the connecting piece (24) in the hous se (4) fixed suction opening (28).

Description

The invention relates to a suction nozzle for a vacuum cleaner, comprising a housing, with a suction channel formed in the housing, a suction chamber and a suction mouth, wherein in the suction chamber, a driven brush body is arranged, which has a plurality of filaments and rotatably provided in the housing bearing points is stored.

Suction nozzles for vacuum cleaners, which are also referred to as attachments, nozzles, brush nozzles or depending on the purpose as Hartbodendüsen or electric brushes are known in the art. Vacuum cleaner with such suction nozzles have a base housing in which an electric motor driven suction fan is arranged to build a Saugluftströmung. The suction nozzle is typically fluidly connected to the vacuum cleaner via a flexible suction hose and / or a handling tube. In addition, such suction nozzles sometimes have a rotating brush roller, by means of which dust and dirt particles and hair and fibers can be detached from the soil to be cleaned more effectively. From a rotating brush body radially projecting filament tufts or the like act on the ground. In this way, detached from the ground dust and dirt particles and hair and fibers are entrained by the Saugluftströmung and deposited in a arranged in the base housing dust collection chamber in a dust filter bag. Instead of a dust filter bag, a cyclone may be seconded for dust separation in the basic housing. The suction mouth of known generic suction nozzles is usually surrounded by limiting means in the form of brush strips and / or sealing lips.

It is also known to provide suction nozzles with two in the stroke direction of the suction nozzle successively arranged suction mouths, wherein the rear in the pre-stroke suction mouth is used in particular the fine dust absorption. The front in the suction direction of the suction nozzle front suction cup is intended to accommodate in particular coarse material, which is why relatively large openings in the limiting means of the front suction mouth are required so that the male Grobgut can enter the front suction mouth as unhindered. On the other hand, the circumference of the rear suction mouth is sealed as ideally as possible, so that a high negative pressure for the absorption of fine dust can be achieved. Therefore, no openings are provided in the limiting means of the rear Saugmundes. A disadvantage of this known embodiment is that a suction nozzle thus executed in the return stroke, the coarse material, due to the circumferential seal of the rear Saugmundes, pushes over the ground and does not absorb.

Furthermore, generic brushes are known, which have a relatively small suction mouth, thereby achieving a sufficient negative pressure for receiving particulate matter. A disadvantage of this embodiment, however, is the reduced due to the reduction of the suction mouth, general dust pickup of the suction nozzle.

Based on this, the present invention seeks to provide a suction nozzle of the type mentioned above, which offers an improved fine dust absorption with satisfactory absorption of fibers and coarse material.

This object is achieved by a suction nozzle with the features specified in claim 1. Preferred and advantageous embodiments of the suction nozzle according to the invention are specified in the subclaims.

The suction nozzle according to the invention has a housing, a suction channel formed in the housing, a suction chamber and a suction mouth, wherein in the suction chamber, a driven brush body is arranged, which has a plurality of filaments and is rotatably mounted in bearings provided on the housing. According to the invention, the brush body has at least one suction channel for removing fine dust. The suction channel goes into an elongated, arranged on the lateral surface of the brush body inlet opening and is connected to a non-rotatably connected to the brush body connector, which has at least over an axial portion of a cylindrical outer peripheral surface. The connecting piece is associated with at least one secondary suction channel branching off from the suction channel of the suction nozzle, which has a suction opening facing the connection piece and fixed in the housing.

By integrating at least one suction channel into the brush body, an improved fine dust absorption of the suction nozzle is made possible. The surrounding the suction mouth seal can be better designed for receiving coarse material in such a suction nozzle, since the fine dust is sucked through the integrated suction in the brush body.

By means of the suction nozzle according to the invention, the fine dust separated by means of the filaments of the rotating brush body can be sucked directly off a floor to be cleaned. For the suction of the fine dust, the brush body can have a seal at the elongated inlet opening of the integrated suction channel, so that a very effective absorption of fine dust can be achieved.

The elongated inlet opening of the at least one suction channel can be parallel to Be formed axis of rotation of the brush body. However, the elongate inlet opening of the suction channel can also be formed obliquely or helically to the axis of rotation. The various design variants of the suction opening can be adapted to the arrangement of the filaments of conventional brush body. The filaments of the brush body of the suction nozzle according to the invention can also be referred to as bristles in particular.

The elongated inlet opening or the at least one suction channel of the brush body of the suction nozzle according to the invention can, according to a preferred embodiment of the invention, taper in the direction of the brush body axis (axis of rotation). For example, end faces of the inlet opening or of the suction channel of the brush body taper in the direction of the brush body axis in such a way that, viewed from the inlet opening in axial section (longitudinal section) of the brush body, the suction channel has a substantially triangular or circular-segment-shaped base.

Preferably, the non-rotatably connected to the brush body connection piece is formed as a rubber ring with at least one hole-shaped recess, wherein the recess of the rubber ring is in register with an outlet opening of the suction channel of the brush body. The design of the connection piece as a rubber ring creates a cost-effective connection possibility for producing an intermittent or even permanent suction connection between the intake opening of the secondary suction duct branching off from the suction duct of the suction nozzle and the at least one suction duct of the rotating brush body. Further, the rubber ring can be easily fixed to a formed in the outer surface of the brush body annular groove. The hole-shaped recess in the rubber ring is preferably arranged substantially congruent with the outlet opening of the suction channel.

A further preferred embodiment of the suction nozzle according to the invention is characterized in that the inlet opening of the suction channel is provided with respect to the brush body radially projecting sealing lips. This makes it possible to achieve a particularly efficient fine dust absorption. The sealing lips are attached to the brush body and made flexible so that they can absorb the forces acting on the surface to be cleaned by the contact.

According to a further preferred embodiment of the suction nozzle according to the invention, the inlet opening and the outlet opening of the at least one suction channel offset from each other, preferably offset by 90 ° to each other, formed in the brush body. This embodiment has the advantage that a plurality of suction channels can be arranged in the brush body. In addition, a simpler connection of the suction channel of the brush body is made possible at the suction opening defined in the housing, since the exit opening of the suction channel of the brush body is not directed downwards at an inlet opening in contact with a floor to be cleaned.

Preferably, a plurality of suction channels are formed in the brush body. As a result, fine dust can be taken up and removed several times during one revolution of the brush body. The absorption capacity of fine dust is thus increased, which leads to a higher cleaning performance.

A further preferred embodiment of the suction nozzle according to the invention provides that at least two elongated inlet openings are formed separately from each other, preferably in alignment next to one another in the brush body. Here, the inlet openings are connected by separate suction channels with a respective outlet opening, wherein the outlet openings are preferably formed on different sides of the brush body. By virtue of the elongated inlet openings formed separately from one another, a higher suction power can be made available with regard to the fine dust absorption, than in a configuration in which the brush body has only a single elongated inlet opening.

In this context, a further preferred embodiment of the invention is that the inlet openings of the at least two suction ducts offset from one another, preferably by 180 ° or evenly offset over the circumference, are formed in the brush body. During operation of the rotating brush body of the suction nozzle thus results even at relatively low speeds, a more uniform fine dust absorption. In this embodiment, the at least two inlet openings of the suction channels are in contact with a surface to be cleaned twice during one revolution of the brush body, whereby an improved absorption of fine dust is ensured.

Furthermore, the outlet openings of the at least two suction channels can also be offset in relation to one another, preferably by 180 ° or evenly offset from one another over the circumference, in the brush body. In this way, an admission of the suction channels of the brush body with negative pressure separated from each other, in Depending on the rotational position of the brush body, be enabled.

A further advantageous embodiment of the suction nozzle according to the invention is characterized in that the connecting piece is connected over its entire outer circumference to the suction opening of the secondary suction channel. In this case, the at least one suction channel of the rotating brush body is connected to a suction flow in the suction operation of the suction brush independently of the respective position of the inlet opening of the suction channel. This ensures that not only when the inlet opening faces a floor to be cleaned, fine dust is sucked through the inlet opening of the suction, but sometimes also when the inlet opening assumes a different position relative to the floor to be cleaned.

According to another preferred embodiment of the suction nozzle according to the invention, the suction port of the at least one secondary suction is only connected via the connecting piece to the outlet opening of the suction when the inlet opening of the suction channel is in contact with a surface to be cleaned. The inlet opening of the at least one suction channel of the brush body is thus subjected to a suction flow only when it is facing a surface to be cleaned or is in contact therewith. This is given for each input port once per revolution of the brush body. In this way, a suction of coarse material in the at least one integrated in the brush body suction can be largely prevented.

In the following the invention will be explained in more detail with reference to an illustrative drawing. They show schematically:

1 a suction nozzle according to the invention in a perspective view;

2 a brush body of the suction nozzle according to the invention 1 in a perspective view;

3 the brush body 2 in a plan view or bottom view;

4 a longitudinal sectional view of the brush body 2 along the section line IV-IV in 3 ;

5 a cross-sectional view of the brush body 2 along the section line VV in 3 ; and

6 a further embodiment of a brush body for a suction nozzle according to the invention, wherein end portions of the connecting pieces of the brush body associated Nebensaugkanälen the suction nozzle are shown cut.

In the following description of the various embodiments according to the invention like components are given the same reference numerals, even if the components in the various embodiments in their dimension or shape may have differences.

The 1 shows a trained as an attachment suction nozzle 2 for a vacuum cleaner for removing dust, fibers and coarse material, eg. As small stones and other small hard dirt particles. The suction nozzle 2 has a housing 4 on, in which a suction channel 6 with a suction chamber 7 is formed, wherein the suction chamber 7 a housing-side suction mouth 8th having. Within the suction chamber is a wave-shaped brush body 10 arranged with a variety of filaments 12 (Bristle) is provided. The filaments 12 are preferably grouped into a plurality of filament or bristle pads which are spaced apart from each other in a plurality of rows along the brush body 10 are arranged. The mean distance between two adjacent filament or bristle books is, for example, in the range of 3 to 8 mm. The brush body 10 is in storage 14 rotatably mounted, in the housing 4 trained and / or in the housing 4 are fixed. The brush body is driven 10 by a motor 16 that has a timing belt 18 with one at the end of the brush body 10 arranged gear or a shaft toothing is connected.

In addition to the bristles, the brush body 10 suction 34 (Flow channels) (cf. 2 and 3 ). The Absaufkanäle 34 are for example by drilling into the brush body 10 incorporated. The entrance openings 22 the suction channels 34 preferably extend over almost the entire length of the wavy brush body 10 , The exit openings 32 the suction channels 34 are offset to the entrance openings 22 near the campsites 14 arranged. The exit openings 32 at the campsites 14 So are about the suction channels 34 within the wavy brush body 10 with the entrance openings 22 connected. During operation of the suction nozzle 2 will be at the exit openings 32 a negative pressure is applied, so that an air flow (suction air flow) from the along the wavy brush body 10 trained entrance openings 22 to the exit openings 32 at the campsites 14 results.

Along the respective entrance opening 22 are sealing lips 20 attached, which the entrance opening 22 limit on both sides. When the entrance opening 22 during normal operation of the suction nozzle 2 facing the floor to be cleaned, touching the flexible sealing lips 20 the bottom, forming a seal, which is the transmission of the negative pressure, at the associated outlet opening 32 at the depository 14 is applied, improved on the soil to be cleaned. In this way, for example, on hard floor or on carpet optimal dust absorption can be achieved. The rotation of the brush body 10 allows together with the suction mouth 8th in the direction of the suction channel 6 effective suction air stream the intake of coarse material and fibers, before fine dust through the suction channels 34 within the wavy brush body 10 is received, and this regardless of the direction of movement of the suction nozzle designed as an attachment 2 ,

The entrance openings 22 the suction channels 34 are in the in the 1 to 4 illustrated embodiment offset by approximately 180 ° to each other in the brush body 10 educated. At the ends or bearings 14 of the brush body 10 are rubber rings 24 with hole-shaped recesses 26 formed in the housing 4 the suction nozzle 2 specified suction 28 assigned. The intake openings 28 through the suction channel 6 the suction nozzle 2 branching Nebensaugkanäle 30 Are defined. The hole-shaped recesses 26 of rubber ring 24 are doing over the exit openings 32 with in the brush body 10 located suction channels 34 connected. The exit openings 32 are on both sides of the brush body 10 formed and each about 90 ° to the through the sealing lips 20 limited entrance openings 22 the suction channels 34 staggered.

Upon rotation of the brush body 10 by means of the engine 16 and the belt 18 enter the entrance openings 22 at each revolution of the brush body 10 twice in contact with a surface to be cleaned. The to the entrance openings 22 for example, about 90 ° staggered outlet openings 32 are at the time when the sealing lips 20 at the entrance opening 22 Contact a floor to be cleaned via the hole-shaped recesses 26 with the intake openings 28 the secondary suction channels 30 connected. As a result, a part of a suction air flow through the suction channel 6 is sucked in, used to a Nebensaugstrom for the suction channels 34 provide.

The 2 shows the brush body 10 the suction nozzle 2 in an isometric view. It can be seen that the recesses 26 the rubber rings 24 in overlap with the outlet openings 28 the suction channels 34 of the brush body 10 are arranged. Also in this illustration are the entrance openings 22 the suction channels 34 with radially protruding sealing lips 20 Mistake. At the front sides of the entrance openings 22 can be arranged relatively short sealing lips (not shown). Incidentally, the front sides of the entrance openings 22 through the rubber rings 24 partially sealed.

The 4 and 5 show a sectional views of the brush body 10 along the section line IV-IV and the section line VV in 3 , It can be seen that two entrance openings 22 aligned side by side over the length of the brush body 10 are provided, each in axial section (longitudinal section) of the brush body 10 considered to have a substantially triangular base. The shape of the entrance openings 22 However, it can also be developed differently. For example, the entrance openings 22 in the axial section of the brush body 10 also considered to have the shape of a circle segment, trapezoid or rectangle. Furthermore, the entrance openings 22 offset by 180 ° to each other in the brush body 10 educated. The upper entrance openings 22a are via extraction ducts 34a with the upper outlet openings 32a connected, with the upper outlet openings 32a with the upper recesses 26a the rubber rings 24 are connected. Accordingly, the lower entrance openings 22b via the suction channels 34b with the lower exit openings 32b connected. The sealing lips 20 and the rubber rings 24 are for example via grooves 36 in the brush body 10 fixed.

6 shows a further embodiment of a brush body for a suction nozzle according to the invention 2 in a plan view or bottom view, wherein the suction openings 28 the secondary suction channels 30 are shown cut. It can be seen that the rubber rings 24 over its entire outer circumference of intake ports 28 the secondary suction channels 30 are connected. For this are suction housing 38 provided so that in the secondary suction channels 30 prevailing negative pressure over the intake ports 28 on the entire outer circumference of the rubber rings 24 can act. The secondary suction channels 30 are over the recesses 26 in the rubber rings 24 permanently with the suction channels 34 and thus with the entrance openings 22 connected. It does not matter if the entrance openings 22 to be in contact with a surface to be cleaned or not.

The embodiment of the invention is not limited to the sketched in the drawings embodiments. On the contrary, numerous variants are conceivable which make use of the invention given in the appended claims, even if the design deviates from the drawing.

Claims (10)

Suction nozzle for a vacuum cleaner, with a housing ( 4 ), with one in the housing ( 4 ) formed suction channel ( 6 ), a suction chamber ( 7 ) and a suction mouth ( 8th ), wherein in the suction chamber ( 7 ) a driven brush body ( 10 ), which is a plurality of filaments ( 12 ) and in on the housing ( 4 ) ( 14 ) is rotatably mounted, characterized in that the brush body ( 10 ) at least one suction channel ( 34 ) for discharging fine dust, wherein the suction channel ( 34 ) in an elongated, on the lateral surface of the brush body ( 10 ) arranged inlet opening ( 22 ) and at one with the brush body ( 10 ) non-rotatably connected connector ( 24 ) is connected, which has at least over an axial portion of a cylindrical outer peripheral surface, and wherein the connecting piece ( 24 ) at least one of the suction channel ( 6 ) branching secondary suction channel ( 30 ) associated with the fitting ( 24 ), in the housing ( 4 ) fixed suction opening ( 28 ) having. Suction nozzle according to claim 1, characterized in that the connecting piece ( 24 ) as rubber ring ( 24 ) with at least one hole-shaped recess ( 26 ) is formed, wherein the recess ( 26 ) with an exit opening ( 32 ) of the suction channel ( 34 ) is in overlap. Suction nozzle according to claim 1 or 2, characterized in that the inlet opening ( 22 ) of the suction channel ( 34 ) with respect to the brush body ( 10 ) radially projecting sealing lips ( 20 ) is provided. Suction nozzle according to one of claims 1 or 3 in conjunction with claim 2, characterized in that the inlet opening ( 22 ) and the exit opening ( 32 ) of the at least one suction channel ( 34 ) offset from one another, preferably offset by 90 ° to each other, in the brush body ( 10 ) are formed. Suction nozzle according to one of claims 1 to 4, characterized in that a plurality of suction channels ( 34 ) in the brush body ( 10 ) are formed. Suction nozzle according to claim 5, characterized in that at least two elongated inlet openings ( 22 ) separated from each other in the brush body ( 10 ) are formed. Suction nozzle according to claim 5 or 6, characterized in that the inlet openings ( 22 ) of the suction channels ( 34 ) offset to one another, preferably by 180 ° or evenly offset over the circumference, in the brush body (in 10 ) are formed. Suction nozzle according to one of claims 5 to 7 in conjunction with claim 2, characterized in that the outlet openings ( 32 ) of the suction channels ( 34 ) offset to one another, preferably by 180 ° or evenly offset over the circumference, in the brush body (in 10 ) are formed. Suction nozzle according to one of claims 1 to 8, characterized in that the connecting piece ( 24 ) over its entire outer circumference at the intake opening ( 28 ) of the secondary suction channel ( 30 ) connected. Suction nozzle according to one of claims 1 to 8 in conjunction with claim 2, characterized in that the suction opening ( 28 ) of the at least one secondary suction channel ( 30 ) only via the connector ( 24 ) at the exit opening ( 32 ) of the suction channel ( 34 ) is connected when the input port ( 22 ) of the suction channel ( 34 ) faces a surface to be cleaned.

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