EP3906830A1 - Hand-guided cyclone vacuum cleaner - Google Patents

Abstract

The invention relates to a hand-held cyclone vacuum cleaner, having a separation unit for collecting suction material, which has a drive unit (5) for generating a suction flow, a first filter stage (6), a second filter stage (7) and a third filter stage (8); wherein the drive unit (5) is arranged in a drive unit housing (15) downstream of the second filter stage (7) and upstream of the third filter stage (8), the drive unit (5) being flowed around by the suction flow generated during operation of the drive unit (5).

Description

The invention relates to a hand-held cyclone vacuum cleaner which, for the sake of simplicity, is referred to below as a vacuum cleaner. In particular, the invention relates to a vacuum cleaner which has a separating container for receiving suction material and a drive unit container which has a drive unit which is designed to generate a suction air flow during operation.

Such a vacuum cleaner is from the WO2017 / 046 559 A1 known. The vacuum cleaner has two filter stages that are implemented using cyclone technology so that they are designed as a multi-cyclone. Furthermore, the vacuum cleaner has a third filter stage downstream of the multicyclone in terms of flow, which is built around an encapsulated radial fan. An axial outflow of the fan is directed through an exhaust air filter. However, the flow to the various filter stages requires a relatively large amount of space.

The invention thus poses the problem of providing a hand-held cyclone vacuum cleaner which has several filter stages that are implemented in a compact installation space. In addition, the filter levels should be accessible to the user.

According to the invention, this problem is solved by a hand-held cyclone vacuum cleaner with the features of claim 1. Advantageous refinements and developments of the invention emerge from the following subclaims.

The invention provides a vacuum cleaner in a compact design which has several filter stages. The implementation of several filter stages enables a particularly effective separation unit with a first filter stage with a particularly sharp separation. At the same time, all filter stages of the separation unit that require periodic cleaning are arranged to be easily accessible for the user.

The invention relates to a hand-held cyclone vacuum cleaner, having a separation unit for collecting suction material, which has a drive unit for generating a suction flow, a first filter stage, a second filter stage and a third filter stage; wherein the drive unit is arranged in a drive unit housing downstream of the second filter stage and upstream of the third filter stage, the drive unit being flowed around by the suction flow generated when the drive unit is in operation. The drive unit is spatially arranged between the second filter stage and the third filter stage in a drive unit housing.

The fact that the suction flow can flow around the drive unit located in the drive unit housing saves installation space.

The expression "hand-held" means that the vacuum cleaner is operated by hand by the user. For this purpose, the vacuum cleaner preferably also has a handle. The handle is preferably firmly connected or connectable to the separation unit.

The term "cyclone vacuum cleaner" is to be understood as a vacuum cleaner which is bagless and in which the suction flow in the separation unit forms an eddy current which functions to separate dust and dirt particles from the suction flow under the influence of gravity. The first filter stage of the separation unit of the cyclone vacuum cleaner forms a longitudinal axis, with the suction flow forming an eddy current around the longitudinal axis of the first filter stage during operation of the drive unit, the longitudinal axis of the first filter stage being aligned parallel to the longitudinal axis of the suction pipe. The parallel alignment of the longitudinal axes of the first filter stage and the suction pipe are decisive for the realization of a vacuum cleaner with a compact design.

The expression "bagless" means that the suction material in the vacuum cleaner is collected directly in the separation unit without a bag or a similar replaceable filter medium for receiving suction material being arranged in it, so that the user can empty the suction material from the Separation unit does not remove a bag or the like from the separation container. The vacuum cleaner, however, has several filter media which prevent sucked-up material from reaching the drive unit arranged in the drive unit housing.

In a preferred embodiment, the drive unit is arranged in such a way that a direction of inflow of the suction flow into the drive unit is opposite to a direction of flow of the suction flow from the second filter stage to the third filter stage. The suction flow generated therefore also changes its direction by 180 ° during its path within the vacuum cleaner. The drive unit, which is preferably designed as a fan, is preferably rotated by 180 ° with respect to a suction pipe of the vacuum cleaner, into which the suction flow enters the vacuum cleaner before entering the three filter stages. That is to say, one direction of flow of the suction flow flowing into the intake manifold is opposite to a further flow direction of the suction flow entering the drive unit.

The first filter stage preferably has a cyclone generated during operation of the drive unit, the second filter stage a prefilter and the third filter stage a central filter. The central filter preferably has a storage medium which is designed to store dust. It is preferably designed as a fine filter. The pre-filter essentially serves as a Filter protection for the central filter and is essentially designed to prevent coarse particles from entering a space between the second filter stage and the third filter stage.

The prefilter and the central filter are preferably arranged axially along the longitudinal axis of the separation unit. The separation unit preferably extends along a longitudinal axis. The prefilter and the central filter preferably each extend parallel to the longitudinal axis.

The first filter stage, the second filter stage and the third filter stage are preferably arranged one behind the other in terms of flow in the specified order. This means that the suction flow generated first passes through the first filter stage, then the second filter stage and finally the third filter stage.

In a preferred embodiment, the first filter stage also has an inlet slot which is arranged such that, during operation, the suction flow from the inlet slot is guided tangentially to an inner wall of the separator container, so that a cyclone forms in the first filter stage during operation. The cyclone vortex is formed during operation in the first filter stage, so that particles separate out with a certain pressure loss and a certain separating grain. The first filter stage preferably has the inlet slot, the inner wall and a dip tube. The immersion tube is preferably firmly connected to the inner wall and is arranged on a side of the inner wall that faces away from the second filter stage. The inlet slot preferably has a rectangular cross section.

The vacuum cleaner preferably has the suction tube from which the suction stream flows into the inlet slot during operation. The suction pipe preferably has a circular cross section. The suction pipe can preferably be connected to a floor nozzle and / or an extension pipe. The suction tube has a longitudinal axis which lies at the center of its circular cross-section and extends along the entire length of the suction tube.

The second filter stage preferably has a prefilter. The prefilter is preferably formed from a fabric gauze, a plastic sieve, a punched grid or a metal gauze. The second filter stage preferably also has an inner tube which is connected to the prefilter. In terms of flow, the inner tube is preferably arranged downstream of the prefilter and upstream of the third filter stage. The prefilter is preferably arranged between the inner wall and the inner tube.

In a preferred embodiment, the central filter is a cylindrical filter which is sealed off from the drive unit and from a separation unit outer housing. Preferred the central filter has a storage medium which is designed to store dust. It is preferably designed as a fine filter. The pre-filter essentially serves as filter protection for the central filter and is essentially designed to prevent coarse particles from entering a space between the second filter stage and the third filter stage.

The third filter stage is preferably arranged in such a way that the suction flow generated during operation flows axially into the drive unit. This enables a compact design of the vacuum cleaner.

In a preferred embodiment, the second filter stage can be removed from the separation unit in a removal direction which is opposite to a further removal direction in which the third filter stage can be removed from the separation unit. Due to the parallel displaced arrangement of the second filter stage and the third filter stage, both can be removed independently of one another. The prefilter is preferably detachably connected to the inner wall of the first filter stage, which is connected to the immersion tube, so that the second filter stage can be removed from the separating container by removing the immersion tube.

In a preferred embodiment, the vacuum cleaner also has a fourth filter stage, which is fluidically arranged downstream of the third filter stage and which has an exhaust air filter element. The exhaust air filter element is preferably designed as a filter or a flap in an outer housing of the separation unit.

In a preferred embodiment, the separation unit has a drive unit container and a separation container, the drive unit container containing the drive unit housing, the drive unit and the third filter stage and the separation container having the first and the second filter stage. The drive unit container and the separator container are preferably arranged adjacently and extend along parallel longitudinal axes. The separator container and the drive unit container are preferably permanently connected to one another.

The drive unit housing is preferably surrounded by a circular segment-shaped flow cross-section through which the suction flow flows during operation before it reaches the third filter stage. As a result, the vacuum cleaner is still made available in a compact manner. The circular segment-shaped flow cross-section can, however, be partially interrupted by functional geometry (s). The drive unit housing, the flow cross-section and the central filter are preferably designed and arranged in such a way that the suction flow flows over the circumference of the third filter stage during operation.

Preferably, a suction pipe diameter of the suction pipe is essentially equal to a cross-sectional area of the inlet slot with a rectangular cross-section. Is preferred Suction pipe diameter essentially equal to a filter stage diameter of the inner pipe of the second filter stage and / or equal to a diameter of the prefilter. An area of the flow cross-section between the drive unit housing and the drive unit container outer housing is preferably approximately equal to the area of the suction pipe diameter. The diameters mean, in particular, internal diameters.

The diameter of the suction tube is preferably in the range from 20 to 40 mm, preferably 25 to 35 mm. The first filter stage preferably has the following dimensions: The cyclone preferably has a diameter in the range from 90 to 100 mm, a height of the cyclone, which is defined as a dimension between the inlet slot and the inner wall, is preferably in the range from 80 to 140 mm, preferably 110 to 130 mm. A height of the immersion tube, which represents a longitudinal extension of the immersion tube starting from the inner wall, is preferably in the range of 20-60 mm, more preferably 30 to 50 mm, and a diameter of the immersion tube is preferably 35-60 mm, more preferably 40 to 50 mm. A width of the inlet slot is preferably 14-30 mm, preferably 18 to 26, while a height of the inlet slot is preferably 20-52 mm, preferably 30 to 40 mm, the height and width of the inlet slot defining a cross section of the inlet slot. The smaller the diameter of the prefilter, the better the separation between the second and third filter stages and the better their separation efficiency.

The drive unit container is preferably connected to the handle. In an operational working position, the drive unit container is preferably located on a rear or rear end of the vacuum cleaner, which means that it is closer to the user's hand and further away from the surface to be vacuumed than the separating container.

The vacuum cleaner is preferably a cordless vacuum cleaner. That is, the vacuum cleaner has an accumulator and is designed to be operated by means of the accumulator as a power source. The accumulator can be connected to the suction material container and / or the device body, preferably the device body.

Furthermore, the vacuum cleaner can have an extension pipe that can be connected to the suction pipe. Furthermore, the vacuum cleaner can have a floor nozzle that can be connected to the suction tube and the extension tube.

The drive unit is preferably designed as a fan.

Fig. 1

eine Teil-Querschnittsansicht eines erfindungsgemäßen Staubsaugers;

Fig. 2

eine perspektivische Ansicht des in Fig. 1 gezeigten Staubsaugers;

Fig. 3

eine Querschnittsansicht des in Fig. 2 gezeigten Staubsaugers;

Fig.4

eine weitere Querschnittsansicht des in Fig. 2 gezeigten Staubsaugers;

Fig. 5

eine weitere Teil-Querschnittsansicht des in Fig. 2 gezeigten Staubsaugers;

Fig. 6

eine weitere Querschnittsansicht des in Fig. 2 gezeigten Staubsaugers;

Fig. 7

eine weitere Querschnittsansicht des in Fig. 2 gezeigten Staubsaugers;

Fig. 8

eine weitere Querschnittsansicht des in Fig. 2 gezeigten Staubsaugers; und

Fig. 9

eine weitere Teil-Querschnittsansicht des in Fig. 2 gezeigten Staubsaugers.

An embodiment of the invention is shown purely schematically in the drawings and is described in more detail below. It shows

Fig. 1

a partial cross-sectional view of a vacuum cleaner according to the invention;

Fig. 2

a perspective view of the in Fig. 1 shown vacuum cleaner;

Fig. 3

a cross-sectional view of the in Fig. 2 shown vacuum cleaner;

Fig. 4

a further cross-sectional view of the in Fig. 2 shown vacuum cleaner;

Fig. 5

a further partial cross-sectional view of the in Fig. 2 shown vacuum cleaner;

Fig. 6

a further cross-sectional view of the in Fig. 2 shown vacuum cleaner;

Fig. 7

a further cross-sectional view of the in Fig. 2 shown vacuum cleaner;

Fig. 8

a further cross-sectional view of the in Fig. 2 shown vacuum cleaner; and

Fig. 9

a further partial cross-sectional view of the in Fig. 2 shown vacuum cleaner.

Fig. 1 shows a partial cross-sectional view of a vacuum cleaner according to the invention. The vacuum cleaner has a separation unit which has a separation container 3 and a drive unit container 2 which are permanently connected. The separating container 3 is designed to collect suction material, while the adjacent drive unit container 2 contains a drive unit 5 which is designed to generate a suction flow. The separation container 3 has a first filter stage 6 and a second filter stage 7, while the drive unit container 2 has a third filter stage 8. The first filter stage 6 has a cyclone generated during operation, while the second filter stage 7 has a prefilter and the third filter stage 8 has a central filter.

The first filter stage 6, the second filter stage 7 and the third filter stage 8 are arranged one behind the other in terms of flow in the specified order. The pre-filter and the central filter are arranged axially. The first filter stage 6 has an inner wall 10 and a dip tube 17. The drive unit container 2 has a drive unit container outer housing 12 into which a fourth filter stage 9 in the form of an exhaust air filter is optionally integrated. Furthermore, the drive unit container 2 has a drive unit housing 15 in which the drive unit 5 is installed.

During operation, the drive unit 5 generates a suction flow, which is partially indicated by the arrows. First, the suction flow passes through the first filter stage 6, where it hits the inner wall 10 and a cyclone forms. The suction flow then passes through the second filter stage 7, then flows around the drive unit housing 15 and is directed to the third filter stage 8, where it flows circumferentially. After passing through the third filter stage 8, the suction flow arrives in a space defined by the drive unit housing 15 in which the drive unit 5 is located and can exit from this space through the filter stage 9 and thus leave the vacuum cleaner.

Fig. 2 FIG. 11 shows a perspective view of the FIG Fig. 1 shown vacuum cleaner. The vacuum cleaner has a handle 1 which is connected to the drive unit container 2 is. Furthermore, the vacuum cleaner has a suction tube 4, which can also optionally be connected to an extension tube 11 or a floor nozzle (not shown).

During operation, the suction flow first flows through the extension pipe 11, passes the suction pipe 4, then flows out of the suction pipe 4 into the separator container 3 and then from this into the drive unit container 2 and then leaves the vacuum cleaner.

Fig. 3 FIG. 11 shows a cross-sectional view of the in FIG Fig. 2 shown vacuum cleaner along the line III-III. The suction pipe 4 is arranged in front of the first filter stage (not shown) and has a circular cross section with a suction pipe diameter D.

Fig. 4 FIG. 11 shows another cross-sectional view of the FIG Fig. 2 shown vacuum cleaner along the line IV-IV. The suction pipe 4 is connected to the separating container 3 via an inlet slot 14, which runs tangentially into this and the first filter stage 6. During operation, the suction flow from the suction pipe 4 is directed tangentially to the inner wall (not shown) of the separating container 3, so that a cyclone (not shown) is formed in the first filter stage 6.

Fig. 5 FIG. 11 shows another partial cross-sectional view of the FIG Fig. 2 shown vacuum cleaner along the line IV-IV. The inlet slot 14 has a rectangular cross section with a width b and a height h. The rectangular cross-section has an area approximately equal to the area of the in Fig. 3 the suction pipe diameter shown.

Fig. 6 FIG. 11 shows another cross-sectional view of the FIG Fig. 2 shown vacuum cleaner along the line VI-VI. The prefilter or an inner tube (not shown) of the second filter stage 7, which is fluidically downstream of the prefilter, has a circular cross section with a filter stage diameter d. The filter stage diameter d has an area approximately equal to the area of the in Fig. 3 the suction pipe diameter shown.

Fig. 7 FIG. 11 shows another cross-sectional view of the FIG Fig. 2 shown vacuum cleaner along the line VII-VII. The drive unit 5 is arranged in the drive unit housing 15 upstream of the third filter stage (not shown). An area of the cross section between the drive unit housing 15 and the drive unit container outer housing 12 is approximately equal to the area of the in FIG Fig. 3 shown suction pipe diameter. The drive unit container 2 is connected to the handle 1. During operation, the suction stream flows between the drive unit housing 15 and the drive unit container outer housing 12 in a circular segment-shaped flow cross-section which is interrupted by functional geometries (not shown).

Fig. 8 FIG. 11 shows another cross-sectional view of the FIG Fig. 2 shown vacuum cleaner along the line VIII-VIII. The third filter stage 8 is arranged in the drive unit container 2 and surrounded by the drive unit outer housing 12. It is as the central filter educated. The drive unit housing 15 has an opening 16. During operation, the suction flow flows through the central filter and then through the opening 16 into the drive unit housing 15.

Fig. 9 FIG. 11 shows another partial cross-sectional view of the FIG Fig. 2 shown vacuum cleaner. The second filter stage 7 can be removed from the separating container 3 in the direction of the arrow, while the third filter stage 8 can be removed from the drive unit container 2 in the direction of the arrow. The second filter stage 7 and the third filter stage 8 can therefore be removed in opposite directions.

List of reference symbols

b

broad

d

Filter stage diameter

D.

Suction tube diameter

H

height

1

Handle

2

Drive unit reservoir

3

Separation tank

4th

Suction pipe

5

Drive unit

6th

first filter stage

7th

second filter stage

8th

third filter stage

9

fourth filter stage

10

Inner wall

11

Extension tube

12th

Drive unit reservoir outer housing

13th

Separation tank outer housing

14th

Inlet slot

15th

Drive unit housing

16

opening

17th

Immersion tube

Claims (10)

Hand-operated cyclone vacuum cleaner, having a separation unit for collecting suction material, which has a drive unit (5) for generating a suction flow, a first filter stage (6), a second filter stage (7) and a third filter stage (8); the drive unit (5) being arranged in a drive unit housing (15) downstream of the second filter stage (7) and upstream of the third filter stage (8), the drive unit (5) being surrounded by the suction flow generated when the drive unit (5) is in operation. Vacuum cleaner according to claim 1, characterized in that the drive unit (5) is arranged in the drive unit housing (15) in such a way that a direction of inflow of the suction flow into the drive unit (5) is opposite to a direction of flow of the suction flow from the second filter stage (2) to the third filter stage (8). Vacuum cleaner according to claim 1 or 2, characterized in that the first filter stage (6) has a cyclone generated during operation of the drive unit (5), the second filter stage (7) has a pre-filter and the third filter stage (8) has a central filter and the pre-filter and the central filter are arranged axially, the first filter stage (6), the second filter stage (7) and the third filter stage (8) being arranged one behind the other in terms of flow in the specified order. Vacuum cleaner according to one of the preceding claims, characterized in that the third filter stage (8) is arranged in such a way that the suction flow generated during operation flows axially into the drive unit (5). Vacuum cleaner according to one of the preceding claims, characterized in that the second filter stage (7) can be removed from the separation unit in a removal direction which is opposite to a further removal direction in which the third filter stage (8) can be removed from the separation unit. Vacuum cleaner according to one of the preceding claims, characterized by a fourth filter stage (9) which is fluidically arranged downstream of the third filter stage (8) and which has an exhaust air filter element which is preferably designed as a filter or a flap in an outer housing of the separation unit. Vacuum cleaner according to one of the preceding claims, characterized in that the second filter stage (7) has a pre-filter made of a fabric gauze, a plastic sieve, a stamped grille or a metal gauze. Vacuum cleaner according to one of the preceding claims, characterized in that the third filter stage (8) has a cylindrical central filter which is sealed off from the drive unit (5) and from an outer housing (12) of the separation unit. Vacuum cleaner according to one of the preceding claims, characterized in that the separation unit has a drive unit container (2) and a separation container (3), the drive unit container (2), the drive unit housing (15), the drive unit (5) and the third filter stage (8) ) and the separator container (3) has the first and second filter stages (6, 7) and wherein the drive unit container (3) and the separator container (3) are arranged adjacent and each extend along parallel longitudinal axes. Vacuum cleaner according to one of the preceding claims, characterized in that the drive unit housing (15) is surrounded by a circular segment-shaped flow cross-section through which the suction flow flows during operation before it reaches the third filter stage (8).

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