TWM556580U - Suction nozzle with improved fine-dust discharge device - Google Patents

Abstract

The present invention relates to an air suction nozzle for a vacuum cleaner, which has a housing, an air suction channel, a suction cavity and an air inlet configured in the housing, wherein a driven brush body and a brush body are arranged in the suction cavity. It has a plurality of filaments and is rotatably supported in a support portion provided on the housing. In order to provide such a suction nozzle with good suction characteristics for coarse particles and / or fibers to provide an improved fine dust suction capability, the present invention proposes that the brush body has at least one air inlet for suctioning fine dust, The air inlet duct transitions into a slightly elongated inlet which is arranged on the side of the brush body and is connected to a non-rotatable connection piece with the brush body, which connection piece has at least one axial section A cylindrical outer peripheral surface, and wherein the connecting member is assigned at least one secondary suction channel branched from the suction channel, the secondary suction channel having an air inlet fixed in the housing facing the connecting member.

Description

Suction nozzle with improved fine dust extraction device

The present invention relates to an air suction nozzle with an improved fine dust extraction device. The present invention relates to an air suction nozzle for a vacuum cleaner, the air suction nozzle having a housing, an air suction channel, a suction cavity and a suction port configured in the housing, wherein a driven brush body is arranged in the suction cavity, The brush body has a plurality of filaments and is rotatably supported in a support portion provided on the housing.

A variety of suction nozzles for vacuum cleaners are known in practice, which are also called attachments, suction nozzles, brush nozzles or hard floor nozzles or brushes depending on the purpose of use. A vacuum cleaner having such a suction nozzle has a base housing in which an air extractor driven by an electric motor is arranged for constructing a suction air flow. The suction nozzle is usually connected to the vacuum cleaner in a flow-tight manner via a flexible suction hose and / or operating tube. In addition, such a suction nozzle sometimes has a rotatable brush roller, with which the dust particles and dirt particles, and hair and fibers can be more effectively separated from the floor to be cleaned. In this regard, a filament bundle extending radially from the rotatable brush body acts on the ground. The dust particles and dirt particles and hair and fibers detached from the ground in this manner are sucked away by the suction air flow and are deposited in a vacuum cleaner filter bag in a dust collection chamber arranged in the basic housing. Instead of a vacuum cleaner filter bag, a cyclone for depositing dust can also be arranged in the basic housing. The suction openings of the known suction nozzles mentioned at the outset are usually surrounded by a restriction in the form of a brush strip and / or a sealing lip.

It is also known to provide an air suction nozzle having two air suction openings which are arranged one after the other in the lift direction of the air suction nozzle, wherein the air suction opening rearward in the rising direction is used in particular for absorbing fine dust. The suction port in the front along the upward direction of the suction nozzle should particularly absorb coarse particles, so a relatively large opening is required in the restriction mechanism of the suction port in front, so that the coarse particles to be absorbed can enter as unobstructed as possible Front suction port. On the other hand, the circumferential direction of the rear suction port is hermetically sealed in the most ideal case, so that a high negative pressure can be achieved for absorbing fine dust. Therefore, there is no opening in the restriction mechanism of the rear air inlet. The disadvantage of this known embodiment is that the suction nozzle thus implemented pulls coarse particles above the ground due to the surrounding seal of the rear suction port during the return stroke and does not absorb it.

In addition, such a brush suction nozzle having a relatively small suction port is known in order to achieve sufficient negative pressure to absorb fine dust. However, a disadvantage of this embodiment is that the overall suction capacity of the suction nozzle is reduced due to the reduction of the suction port.

The present invention relates to an air suction nozzle with an improved fine dust extraction device. According to one embodiment of the present invention, based on this, the object of the present invention is to provide a suction nozzle of the type mentioned at the beginning, which provides an improved fine dust absorption capacity while satisfying the absorption of fibers and coarse particles.

According to the present invention, this object is achieved by a suction nozzle having the characteristics given in claim 1. Preferred and advantageous designs of the suction nozzle according to the invention are given in the dependent claims.

The suction nozzle according to the present invention has a housing, a suction channel configured in the housing, a suction cavity, and a suction port, wherein a driven brush body is arranged in the suction cavity, the brush body has a plurality of filaments and can be It is rotatably supported in a bearing portion provided on the housing. According to the present invention, the brush body has at least one air inlet for sucking away fine dust. For this purpose, the air inlet duct transitions into a slightly elongated inlet which is arranged on the side of the brush body and is connected to a non-rotatable connection with the brush body, which is at least in one axial section Has a cylindrical outer peripheral surface. The connecting piece is assigned at least one secondary air inlet branched from the air inlet of the suction nozzle, the secondary air inlet having an air inlet fixed in the housing facing the connecting piece.

By integrating at least one air inlet into the brush body, improved fine dust absorption of the suction nozzle is achieved. In such a suction nozzle, the seal surrounding the suction port can be designed to better absorb coarse particles, since fine dust is discharged through the air inlet integrated in the brush body.

With the suction nozzle according to the present invention, the fine dust detached by the filaments of the rotatable brush body is directly sucked from the floor to be cleaned. In order to suck away the fine dust, the brush body has a seal at the micro-long inlet of the integrated air inlet, so that the fine dust can be absorbed very effectively.

To this end, the micro-elongated inlet of the at least one air inlet can be configured parallel to the axis of rotation of the brush body. However, the elongated inlet of the air inlet can also be configured to be inclined or spiral with respect to the axis of rotation. Different design variations of the suction port can be matched with the arrangement of the filaments of the ordinary brush body. The filaments of the brush body of the suction nozzle according to the invention can also be called bristles.

According to a preferred design solution of the present invention, the micro-long inlet or at least one air inlet of the brush body of the suction nozzle of the present invention may be tapered along the direction of the brush body axis (rotation axis). For example, the inlet of the brush body or the end side of the air inlet gradually tapers in the direction of the brush body axis, so that the axial view (longitudinal section) of the brush body from the inlet, the inlet has a substantially triangular or circular arc from the inlet Shaped basal plane.

In a preferred manner, the connecting member which is non-rotatably connected to the brush body is configured as a rubber ring having at least one hole-shaped recess, wherein the recess of the rubber ring coincides with the outlet of the air inlet of the brush body. The construction of the connecting piece as a rubber ring provides a cost-effective connection solution for a fixed intake opening in the housing and a rotatable secondary suction branch branching from the suction channel of the suction nozzle. An intermittent, even permanent, suction connection is established between at least one of the air inlets of the brush body. Furthermore, the rubber ring can be simply fixed at an annular groove which is constructed in the outer surface of the brush body. For this purpose, preferably, the hole-shaped recesses in the rubber ring are arranged substantially in accordance with the outlet of the air inlet.

According to another preferred design solution of the novel suction nozzle, the inlet of the air inlet is provided with a sealing lip protruding radially with respect to the brush body. This enables particularly effective fine dust absorption. The sealing lip is fixed to the brush body and is configured to be flexible, so that the sealing lip can absorb forces caused by contact with the surface to be cleaned.

According to another preferred embodiment of the suction nozzle according to the present invention, the inlet and the outlet of the at least one air inlet duct are offset relative to one another, preferably in the brush body by 90 ° from one another. This design solution provides the following advantages, which can arrange multiple air inlets in the brush body. In addition, the air inlet of the brush body can be simply connected to the air inlet fixed in the housing, because the outlet of the air inlet of the brush body does not face downward when contacting the ground to be cleaned.

Preferably, a plurality of air inlets are formed in the brush body. As a result, the brush body can absorb fine dust multiple times and pull it away once in one revolution. As a result, the absorption capacity of fine dust is increased, which leads to higher cleaning efficiency.

According to a further preferred embodiment of the novel suction nozzle, it is provided that at least two slightly elongated inlets are formed in the brush body separately from one another, preferably aligned side by side. In this case, the inlets are connected to the respective outlets by separate inlet ducts, wherein the outlets are preferably configured on different sides of the brush body. Compared to a design in which the brush body has only one micro-elongated inlet, the micro-elongated inlets configured separately from each other can provide higher suction efficiency for fine dust absorption.

In this context, a further preferred embodiment of the present invention consists in that the inlets of at least two inlet ducts are staggered in each other, preferably 180 ° from each other, or evenly staggered in the circumferential surface in the brush body. Therefore, even if the rotation speed is relatively low, more uniform fine dust absorption is achieved during the operation of the rotatable brush body of the suction nozzle. In this design, the brush body rotates once, and at least two inlets of the air inlet are in contact with the surface to be cleaned twice, thereby ensuring better absorption of fine dust.

In addition, the outlets of the at least two intake ducts can also be formed in the brush body offset from one another, preferably 180 ° from one another, or evenly offset circumferentially. In this way, it is possible to load the air inlets of the brush body separately from each other with negative pressure according to the rotation position of the brush body.

Another advantageous design of the suction nozzle according to the present invention is characterized in that the connecting member is connected to the air inlet of the secondary suction channel through the entire outer peripheral surface thereof. In this case, in the suction operation of the suction brush, at least one air inlet of the rotatable brush body is connected to the suction fluid independently of the corresponding position of the inlet of the air inlet. This ensures that not only when the inlet surface is to be cleaned, but also when the inlet occupies another position relative to the floor to be cleaned, fine dust is sucked away through the inlet of the air inlet.

According to another preferred design scheme of the novel suction nozzle, only when the inlet of the air inlet is in contact with the surface to be cleaned, at this time, the air inlet of the at least one secondary air inlet is connected to the outlet of the air inlet through a connection on. Therefore, the inlet of at least one of the air inlets of the brush body is only loaded with the suction fluid when it faces or is in contact with the surface to be cleaned. This is provided once for each entrance in each revolution of the brush body. As a result, it is possible to prevent aspiration of coarse particles into at least one air inlet integrated in the brush body.

Figure 1 shows a suction nozzle 2 for a vacuum cleaner configured as an accessory for removing dust, fibers and coarse particles, such as small stones and other small hard dirt particles. The suction nozzle 2 has a housing 4 in which a suction channel 6 having a suction chamber 7 is configured, wherein the suction chamber 7 has a suction port 8 on the bottom side of the housing. A corrugated brush body 10 is arranged in the suction cavity, and the brush body is provided with a plurality of filaments 12 (bristles). The filaments 12 are preferably grouped into a plurality of filament bundles or bristle bundles, which are arranged in multiple rows along the brush body 10 at intervals. The average distance between two adjacent filament or bristle tufts is, for example, in the range of 3 to 8 mm. The brush body 10 is rotatably supported in a support portion 14, which is configured in the housing 4 and / or fixed in the housing 4. The brush body 10 is driven by a motor 16, and the motor is connected to a gear or shaft fitting portion disposed on an end portion of the brush body 10 through a toothed belt 18.

In addition to the bristles, the brush body 10 has an air inlet 34 (flow channel) (see FIGS. 2 and 3). The intake duct 34 is introduced into the brush body 10 by drilling, for example. The inlet 22 of the intake duct 34 preferably extends over almost the entire length of the corrugated brush body 10. The outlet 32 of the air intake passage 34 is arranged in the vicinity of the support portion 14 in a staggered manner with the inlet 22. As a result, the outlet 32 at the support site 14 is connected to the inlet 22 via the air inlet duct 34 within the corrugated brush body 10. During the operation of the suction nozzle 2, there is a negative pressure at the outlet 32, thereby generating an air flow (intake air flow) from the inlet 22 formed along the corrugated brush body 10 to the outlet 32 at the support portion 14.

Sealing lips 20 are mounted along respective inlets 22, which define the inlets 22 on both sides. When the inlet of the suction nozzle 2 is close to the floor to be cleaned during normal operation, the flexible sealing lip 20 touches the floor and forms a seal there, which improves the negative pressure at the corresponding outlet 32 on the support site 14 Clean the pass on the ground. In this way, for example, optimal dust absorption can be achieved on hard floors or carpets. Before fine dust is absorbed through the air inlet duct 34 within the corrugated brush body 10, the rotation of the brush body 10 is achieved together with the intake air flow acting at the air inlet 8 toward the air inlet 6 Absorption of coarse particles and fibers, and this is independent of the direction of movement of the suction nozzle 2 configured as an accessory.

In the embodiment shown in FIGS. 1 to 4, the inlets 22 of the air inlets 34 are formed in the brush body 10 offset from one another by approximately 180 °. A rubber ring 24 having a hole-shaped notch 26 is formed on the end or support portion 14 of the brush body 10, and the rubber ring is assigned to the suction port 28 fixed in the housing 4 of the suction nozzle 2. The suction port 28 is defined by a secondary suction path 30 branched from the suction path 6 of the suction nozzle 2. For this purpose, the hole-shaped recess 26 of the rubber ring 24 is connected to the air inlet duct 34 in the brush body 10 through an outlet 32. The outlets 32 are formed on both sides of the brush body 10 and are arranged approximately 90 ° apart from the inlets 22 of the intake duct 34 defined by the sealing lip 20.

When the brush body 10 is rotated by means of the motor 16 and the belt 18, the inlet 22 makes two contact with the surface to be cleaned in each revolution of the brush body 10. When the sealing lip 20 at the inlet 22 of the outlet 32 which is staggered about 90 ° from the inlet 22 contacts the floor to be cleaned, the inlet 22 is connected to the suction port 28 of the secondary suction channel 30 through a hole-shaped recess 26. The part of the intake air flow sucked through the intake duct 6 is thus used to provide a secondary intake flow for the intake duct 34.

FIG. 2 shows the brush body 10 of the suction nozzle 2 in an isometric view. It can be seen that the notches 26 of the rubber ring 24 are arranged to coincide with the outlet 28 of the intake passage 34 of the brush body 10. In this illustration, the inlet 22 of the air inlet 34 is also provided with a radially protruding sealing lip 20. A relatively short sealing lip (not shown) can be arranged on the end side of the inlet 22. In addition, the end side of the inlet 22 is partially sealed by the rubber ring 24.

4 and 5 show a cross-sectional view of the brush body 10 along a section line IV-IV and a section line V-V of FIG. 3. It can be seen that the two inlets 22 are arranged side by side along the length of the brush body 10. When viewed in the axial section (longitudinal section) of the brush body 10, the inlets each have a substantially triangular base surface. However, the shape of the inlet 22 may be configured differently; for example, as viewed in the axial section of the brush body 10, the inlet 22 may also have a circular arc segment, trapezoidal, or rectangular shape. In addition, the inlets 22 are formed in the brush body 10 offset 180 ° from each other. The upper inlet 22a is connected to the upper outlet 32a through the air inlet 34a, wherein the upper outlet 32a is connected to the upper recess 26a of the rubber ring 24. Accordingly, the lower inlet 22b is connected to the lower outlet 32b through the air inlet 34b. The sealing lip 20 and the rubber ring 24 are fixed in the brush body 10 by a groove 36, for example.

FIG. 6 shows a further embodiment of a brush body for a suction nozzle 2 according to the invention in a top view or a bottom view, in which the suction opening 28 of the auxiliary suction channel 30 is shown in section. It can be seen that the rubber ring is connected to the suction port 28 of the secondary suction channel 30 through its entire outer peripheral surface. An intake housing 38 is provided for this purpose, so that the negative pressure prevailing in the sub-suction channel 30 can be applied to the entire outer peripheral surface of the rubber ring 24 through the intake port 28. The secondary suction duct 30 is permanently connected to the intake duct 34 and thus to the inlet 22 through a recess 26 in the rubber ring 24. It is not important here whether the inlet 22 is in contact with the surface to be cleaned.

The embodiments of the present invention are not limited to the examples illustrated in the drawings. Instead, many variants can be considered, and even in designs different from the drawings, these variants can also be applied to the new model given in the attached claims.

2‧‧‧ Suction nozzle

4‧‧‧shell

6‧‧‧ Inspiratory tract

7‧‧‧ Inhalation cavity

8‧‧‧ suction port

10‧‧‧Brush body

12‧‧‧ Filament

14‧‧‧ support site

16‧‧‧ Motor

18‧‧‧Belt

20‧‧‧Seal Lip

22‧‧‧ Entrance

22a‧‧‧upper entrance

22b‧‧‧Lower entrance

24‧‧‧Connector; rubber ring

26‧‧‧ hole notch

26a‧‧‧Upper notch

28‧‧‧air inlet; air inlet

30‧‧‧ secondary suction channel

32‧‧‧Export

32a‧‧‧ Upper Exit

32b‧‧‧ lower exit

34, 34a, 34b‧‧‧ Inlet

36‧‧‧Groove

38‧‧‧Air inlet shell

IV-IV, V-V‧‧‧ cutting line

The present invention is explained in detail below with reference to the accompanying drawings that describe embodiments. Which schematically shows:

Figure 1 shows a perspective view of a suction nozzle according to the present invention;

Figure 2 shows a perspective view of the brush body of the suction nozzle according to the present invention of Figure 1;

Figure 3 shows a top view or a bottom view of the brush body of Figure 2;

4 shows a longitudinal cross-sectional view of the brush body of FIG. 2 along the cutting line IV-IV of FIG. 3;

5 illustrates a cross-sectional view of the brush body of FIG. 2 along a cutting line V-V of FIG. 3;

Fig. 6 shows another embodiment of a brush body for a suction nozzle according to the present invention, wherein

In the following description of different embodiments according to the present invention, the same components are provided with the same reference numerals, even though the sizes and shapes of the components in different embodiments may have differences.

2‧‧‧ Suction nozzle

4‧‧‧shell

6‧‧‧ Inspiratory tract

7‧‧‧ Inhalation cavity

8‧‧‧ suction port

10‧‧‧Brush body

12‧‧‧ Filament

14‧‧‧ support site

16‧‧‧ Motor

18‧‧‧Belt

20‧‧‧Seal Lip

24‧‧‧Connector; rubber ring

28‧‧‧air inlet; air inlet

30‧‧‧ secondary suction channel

Claims (10)

An air suction nozzle for a vacuum cleaner has a housing, an air suction channel, a suction cavity and an air suction port constructed in the housing, wherein a driven brush body is arranged in the suction cavity, so that The brush body has a large number of filaments and is rotatably supported in a support portion provided on the casing, wherein the brush body has at least one air inlet for sucking away fine dust, wherein The air inlet passage transitions into a slightly elongated inlet arranged on the side of the brush body and connected to a non-rotatable connection piece connected to the brush body, the connection piece being at least in one axial direction The section has a cylindrical outer peripheral surface, and wherein the connecting member is assigned at least one secondary suction channel branched from the suction channel, and the secondary suction channel has a fixed surface facing the connecting member. Air inlet in the housing. The suction nozzle according to claim 1, wherein the connecting member is configured as a rubber ring having at least one hole-shaped recess, wherein the recess coincides with an outlet of the air inlet. The suction nozzle according to claim 1 or 2, wherein a seal lip protruding in a radial direction with respect to the brush body is provided at an inlet of the air inlet duct. The suction nozzle according to claim 2, characterized in that the inlet and the outlet of at least one of the air inlet passages are arranged in the brush body so as to be offset from each other, preferably 90 ° from each other. The suction nozzle according to claim 1, wherein a plurality of air inlets are configured in the brush body. The suction nozzle according to claim 5, characterized in that: At least two slightly elongated inlets are formed separately from one another in the brush body. The suction nozzle according to claim 5 or 6, characterized in that the inlets of the air inlet ducts are staggered in the brush body, preferably 180 ° from each other, or evenly staggered from each other on the peripheral surface. The suction nozzle according to claim 2, characterized in that a plurality of air inlets are configured in the brush body, and the outlets of the air inlets are staggered from each other, preferably 180 ° from each other, or on the peripheral surface The upper bodies are evenly offset from one another in the brush body. The suction nozzle according to claim 1 or 2, wherein the connecting member is connected to the air inlet of the auxiliary suction channel through the entire outer peripheral surface thereof. The suction nozzle according to claim 2, wherein only when the inlet surface of the air inlet is to be cleaned, at this time, the air inlet of at least one secondary air inlet is connected to the air inlet through a connecting member. At the exit of the road.