CN215272447U - Vacuum cleaner - Google Patents

Abstract

The invention relates to a vacuum cleaner comprising a housing, a liquid filter and a turbine, a suction air inlet and a suction air outlet being formed on the housing, the suction air inlet is used for connecting a suction hose, a suction air channel is formed in the shell, the suction air channel connects the suction air inlet with the suction air outlet through a liquid filter and a turbine, the turbine is formed by a motor with a fan impeller, the shell is provided with a shell opening and a shell cover part, the housing cover covers the housing opening, the liquid filter is composed of a liquid container, a jet pump and a diffuser, the liquid container, the jet pump and the diffuser partially form a suction air channel, the dust collector is provided with a lifting handle for manually conveying the dust collector, and at least three wheels for moving the cleaner over the floor surface, the cleaner having a control on the housing for controlling a function of the cleaner.

Description

Vacuum cleaner

Technical Field

The invention relates to a vacuum cleaner, comprising a housing, a liquid filter and a turbine, wherein a suction air inlet and a suction air outlet are formed on the housing, which suction air inlet is used for connecting a suction hose, wherein a suction air channel is formed inside the housing, wherein the suction air channel connects the suction air inlet and the suction air outlet via the liquid filter and the turbine, wherein the turbine is formed by an electric motor with a fan impeller, which is used for forming a suction air flow in the suction air channel, wherein the housing is provided with a housing opening for removing the liquid filter from the housing and a housing cover, which covers the housing opening, wherein the liquid filter is formed by a liquid container, a jet pump and a diffuser, wherein the liquid container, the jet pump and the diffuser partially form the suction air channel, wherein liquid can be sucked from the liquid container by means of the jet pump, can be conveyed into the suction air flow, can be jetted into the diffuser, can be deposited in the liquid container, wherein the vacuum cleaner has a lifting handle for manually conveying the vacuum cleaner, wherein the vacuum cleaner has at least three wheels for moving the vacuum cleaner over a floor surface, wherein the vacuum cleaner has a manipulator for controlling the vacuum cleaner function on the housing.

Background

Vacuum cleaners are generally known and are commonly used as mobile devices for cleaning surfaces, particularly floor coverings. Inside the cleaner housing, there is usually provided a turbine for generating a suction air flow and a filter. These are, in particular, vacuum cleaners with filter bags, bagless vacuum cleaners and vacuum cleaners with liquid or water filters. Liquid filters of different construction types are also known here. For example, the suction air flow inside the liquid filter rises in the liquid container, wherein the dust particles are wetted by the liquid or water and thus coalesce. It is also known to inject a liquid into the suction air flow by means of an injection pump, so that dust particles located in the suction air flow are moistened and bound in a liquid filter. The disadvantage here is, in particular, that the suction capacity or the filter capacity is not always satisfactory. The vacuum cleaner with the liquid filter is also cumbersome to handle, since the liquid filter needs to be cleaned after use of the vacuum cleaner.

Disclosure of Invention

The object of the present invention is therefore to provide a vacuum cleaner which overcomes the disadvantages known from the prior art.

This object is achieved by a vacuum cleaner having the following features:

the vacuum cleaner according to the invention comprises a housing, a liquid filter and a turbine, wherein a suction air inlet and a suction air outlet are formed on the housing, which suction air inlet is used for connecting a suction hose, wherein a suction air channel is formed inside the housing, wherein the suction air channel connects the suction air inlet and the suction air outlet via the liquid filter and the turbine, wherein the turbine is formed by an electric motor with a fan impeller, which is used for forming a suction air flow in the suction air channel, wherein the housing is provided with a housing opening for removing the liquid filter from the housing and a housing cover, which covers the housing opening, wherein the liquid filter is formed by a liquid container, a jet pump and a diffuser, wherein the liquid container, the jet pump and the diffuser partially form the suction air channel, wherein liquid can be sucked from the liquid container by means of the jet pump, can be conveyed into the suction air flow, can be jetted into the diffuser, can be deposited in the liquid container, wherein the vacuum cleaner has a lifting handle for manually conveying the vacuum cleaner, wherein the vacuum cleaner has at least three wheels for moving the vacuum cleaner over a floor surface, wherein the vacuum cleaner has a manipulator for controlling the vacuum cleaner function on the housing.

The liquid filter of the vacuum cleaner is arranged inside the housing and can be taken out through the housing opening and be refilled therein when the housing cover is opened. This makes it possible to clean the liquid filter particularly easily. The liquid filter has a liquid container which can be filled with a liquid or a filter liquid, such as water. For cleaning the liquid filter, the water can simply be replaced. Furthermore, the liquid filter comprises a jet pump with a diffuser, wherein water can be sucked from the liquid container by the jet pump and sprayed or jetted towards the diffuser. Since the suction air channel extends through the jet pump and the diffuser, the suction air flow can be used as a driving medium with which the water is sucked. In the mixing chamber of the ejector pump, the sprayed water is mixed with the suction air, wherein the dust particles in the suction air are then wetted by the water and thus bound. In the diffuser, the cross section of the suction air channel increases in the flow direction, which leads to an increase in pressure, but also to a slowing down of the suction air flow, so that effective wetting by the dust particles can take place. Thus, even in the case of turbines with high suction forces, a good cleaning effect of the suction air flow can be achieved by the liquid filter.

The dimensioning of the electric motor with the fan wheel, the jet pump with the diffuser and the suction air channel can be selected in each case so that a volume flow can be formed in the suction air channel with the turbine, so that dust is combined with the liquid and the air drying takes place in the liquid filter with optimum efficiency. The greatest possible binding of dust particles in the liquid filter is only possible if the delivery capacity of the turbine and thus the volume flow in the suction air channel, the dimensioning of the jet pump with diffuser adapted to the volume flow, the air guidance adapted to the volume flow, or the design of the suction air channel in the liquid filter, and the mechanism for separating liquid from the suction air channel, or the air drying in the liquid filter, are coordinated with one another. If, for example, the volume flow ratio is small, the suction capacity of the vacuum cleaner and the cleaning of the sucked air are not satisfactory. If the volumetric flow ratio is large, liquid or water may be discharged from the liquid filter or sufficient air drying may not be performed in the liquid filter. The suction capacity of the turbine, the design size of the suction air channel and the design of the jet pump with diffuser can thus be coordinated with one another in order to achieve optimum cleaning with a large suction capacity and at the same time sufficient air drying.

The jet pump can be configured with a plurality of venturi nozzles, which can be connected to the liquid container via at least one liquid line. Water can be sucked from the liquid container via the liquid line and permanently supplied to the venturi nozzle. The venturi nozzle can be formed, for example, by perforations in the wall of the suction air channel. Furthermore, a plurality of liquid lines may be provided.

The diffuser can be configured in the liquid container, wherein the suction air channel can be configured with an air guide surface in order to divert the suction air flow. The diffuser can be formed by the liquid container itself in such a way that the suction air channel running through the liquid container is designed to widen in cross section in the direction of the suction air flow. Furthermore, the suction air flow can be guided in the liquid container along or against the air guiding surface, so that dust particles or liquid droplets wetted with the liquid are deposited on the air guiding surface. In particular, the diversion of the suction air flow causes the heavier dust particles and droplets to be more easily separated. The air guide surface may be a wall portion inside the liquid filter or liquid container, or a web that diverts the suction air flow.

In the liquid container, a droplet separator can be arranged in the suction air channel, wherein the droplet separator can be designed as a filter with a sieve or a filter cloth, wherein the droplet separator can form a wall in the liquid container which divides or divides the liquid sump into a first region for receiving dirty liquid and a second region for receiving clean liquid. Droplets or water droplets, which may still be located in the suction air flow, are caught therein and separated as the suction air flow passes through the screen or filter cloth. If a filter of this design is arranged in the liquid sump, the sewage collects in the first region in the flow direction of the suction air flow and the water which has passed through the filter screen or filter cloth and is therefore less contaminated with dust particles collects in the second region. Overall, this enables extensive cleaning and rapid drying of the suction air flow.

The droplet separator may be designed to be removable from the liquid filter. The droplet separator can thus be removed from the liquid filter, cleaned and recharged manually. This clearly facilitates a simplified cleaning of the droplet separator, for example in the case of water flows.

The ejector pump may be connected to the second region of the liquid container via a suction line for sucking the liquid. The water introduced into the suction air flow by the ejector pump is then relatively clean. The water in the first region is then further enriched with dust particles during operation of the cleaner, wherein the water in the second region is cleaned by the droplet separator or filter. In addition, it can be provided that a further filter is arranged on the suction line in order to prevent clogging of the suction line.

The diffuser may be removable from the liquid container and a grille may be incorporated into the liquid container for restricting movement of liquid located in the liquid container, wherein the grille may be arranged in the liquid container parallel to a level of the liquid. The vacuum cleaner can then be used particularly advantageously for suctioning water located on the floor. The water can then be collected in a liquid container and easily disposed of. The grill may be in a region located at a level of liquid in the liquid container, so that the liquid or water in the liquid container may be effectively prevented from shaking when the cleaner is moved. The grid may extend along the entire liquid level in the liquid container. The lattice of the grid may be formed by vertically arranged, mutually intersecting laminations or webs.

The float element can be attached to the grating in a pivotable manner, wherein the suction air channel on the liquid container can be closed off by the float element as a function of the liquid pool or the liquid level. The float can be a hollow body which is pivotably mounted on the grating by means of a shaft. The rising liquid level then causes the float to float and to oscillate, so that the float closes the suction air channel which projects from the liquid container. The liquid or water can then be prevented from entering the suction air channel from the liquid filter into the section of the suction air channel lying behind in the flow direction of the suction air flow. The suction air channel can be formed above the grille on the liquid filter or the liquid container by an opening, which can be completely closed by the float. A seal can be provided in addition to the float body or the opening.

The diffuser may be removed from the liquid container and a dry filter may be installed in the liquid container for filtering air flowing through the dry filter. The dry filter can be designed with filter membranes in the form of filter bags, with cyclones or, particularly advantageously, with multiple cyclones. The construction of a cyclone or multi-cyclone separator for the dry filter is particularly environmentally friendly, since the filter material does not have to be disposed of. The filter dust can then simply be collected in the liquid container.

The housing cover can be pivotably fixed to the housing by means of a hinge. The housing cover can then be locked on the housing in the closed position on the side of the housing cover opposite the hinge. The housing cover can also remain on the housing after opening without having to be completely removed from the housing opening.

The hinge can be formed by a cylindrical ring belt and a shaft rotatably arranged therein, wherein the cylindrical ring belt can be formed with a section which is partially open, so that the shaft can be removed from the cylindrical ring belt or can be inserted into the cylindrical ring belt in a radial direction relative to the cylindrical ring belt. The cylindrical annulus may be formed by a sleeve into which the shaft is inserted. The sleeve can be designed to be open along the shaft, so that the shaft can be removed from the sleeve in a radial direction relative to the sleeve. The sleeve can thus be constructed in a semicircular manner. Furthermore, the sleeve can be designed such that it encloses the shaft at least in a 180 ° arc segment. The circular arc segment can also be designed to be >180 °, so that the shaft is locked in the sleeve when the shaft is inserted into the sleeve in the radial direction. The latching resistance of the hinge is then to be overcome when the housing cover is attached or detached. The housing cover may also be pivotably secured to the housing by a plurality of hinges. The hinges are then aligned with respect to each other with a common axis.

The housing cover or a cover receptacle formed in the housing and partially surrounding the hinge can be formed with a bend, wherein the bend can be arranged relative to the housing cover or the cover receptacle, so that the shaft can be held in the cylindrical ring band in a form-fitting and rotatable manner in the closed position and in the maximally open position of the housing cover. The bend can be configured in the hinge region on the housing cover or housing, so that it is arranged opposite the open section. The curved portion may thus be formed on or by the cover receiving portion of the housing or alternatively on or by the housing cover. If the curvature is formed by the housing cover, two curvatures can also be provided on the housing cover. The curved portion may reduce the clearance between the cover receiving portion and the housing cover to an extent such that the shaft cannot be removed from the cylindrical annulus or sleeve when the housing cover is in the closed position or the maximum open position. The housing cover is thus always securely fixed to the housing in the intended use position for the housing cover. The closed position and the maximum opening position each correspond to the end position of the pivot region of the housing cover.

The shaft can be removed from the cylindrical ring belt or can be inserted into it in the substantially vertical open position of the housing cover. In the vertical open position, that is to say when the housing cover is in a substantially vertical position, a gap is formed between the cover receiving portion and the housing cover, which gap allows the shaft to be removed from the open section of the cylindrical annulus or sleeve in a radial direction relative to the cylindrical annulus. The housing cover can then simply be detached from the housing or connected to the housing in the vertical open position without tools being required for this purpose. The housing cover cannot fall off the housing at once, since the housing cover must be removed in a targeted manner in order to be in the vertical open position. In the vertical open position, a comparatively large gap is formed between the bending section and the cover receiving section or the housing cover.

The housing cover can be designed with a latching device for positively locking the housing cover to the housing. The latching means then allow the housing cover to be locked in its closed position.

The latching device can be designed with a linearly displaceable latch, to which the spring force of the spring is applied, which in the closed position of the housing cover engages with a catch at the housing opening or on the housing cover, and with a lever for actuating the latch, wherein the lever can be arranged on the housing flush with the housing surface. The latch may be configured in the form of a latch such that the latch is moved against the spring force of the spring by manually pressing the housing cover against the housing and latches with the catch. The latching means and the web can be arranged opposite each other at the housing opening or on the housing cover. The tab may be formed by an opening, a ladder section or an edge into which a latch may be inserted, the latch hooking over the edge in the closed position. The operating lever can be configured, for example, in the form of a handle or a grip plate which terminates flush with the housing surface of the housing. When the lever is manually actuated, the handle or the grip plate can be lifted a distance, so that the latching element is moved by the mechanical coupling of the lever to the latching element. The latching means can then be moved against the spring force of the spring and the tab is released to such an extent that the latching means, together with the housing cover, is moved past the tab and can open the housing cover.

The lever can be arranged pivotably about an axis at the housing opening or at the housing cover, wherein the lever or the latching means can be designed with at least one projection which engages in at least one recess formed in the latching means or the lever. The lever can therefore be recessed and the latching means can be formed with projections or, conversely, by means of which the lever is mechanically coupled to the latching means. If the actuating lever is designed to be pivotable about an axis, then, due to the insertion of the projection into the recess, a linear displacement of the latching means can be brought about by a pivoting movement of the actuating lever, which can be carried out manually. If the lever is configured, for example, in the form of a gripping plate, the gripping plate can be lifted manually for a distance such that the latch releases the bridge plate.

The recess and the projection may be configured such that manual pivoting of the lever about the axis causes the projection to move on an inner side of the recess, which in turn causes linear movement of the latch relative to the tab, such that the latch releases the tab. By inserting the projection into the recess, the projection contacts the inner side of the recess when the lever is manipulated. The projection can also be configured, for example, in the form of a pin or similar projection which is inserted into the recess.

The recess and the projection can be configured such that, when the housing cover is moved into the closed position and before the latching means latches with the tab in the closed position, the projection can be moved within the recess, wherein the actuating lever can then remain stationary. If the latching means is embodied in the form of a latch, for example, the latching means is pressed back on the web during the closing movement of the housing cover, i.e. is moved linearly against the spring force. The cam and the recess can be moved relative to each other in this case, so that the actuating lever remains stationary, i.e. does not lift when the plate is gripped. In particular, a sufficiently large gap can be formed between the projection and the recess for this purpose, which gap allows such a linear movement of the latching element.

The turbine may be arranged in the suction air channel downstream of the liquid filter in the flow direction of the suction air flow. The following advantages are thereby obtained: dust and dirt that may be present in the suction air does not reach the turbine because it has already been separated in the liquid filter. This significantly increases the lifetime of the turbine, since dust particles also do not enter the motor of the turbine.

A suspended matter filter can be provided in the intake air channel, wherein the suspended matter filter is arranged downstream of the liquid filter and upstream of the turbine in the flow direction of the intake air channel. The dust particles which may also be present in the suction air can be removed from the suction air by means of the suspended-matter filter. Comparatively small dust particles, which are not separated in the liquid filter, can be trapped in the suspended matter filter, so that particularly clean suction air reaches the turbine.

The suspended matter filter may be a HEPA-filter. The HEPA filter (high efficiency particulate air filter) may be formed, for example, from a nonwoven fabric or a multilayer nonwoven fabric. The nonwoven may be arranged in a folded (Leporello) manner in order to provide as large a surface area as possible.

A cooling air channel may be formed inside the housing, wherein the cooling air channel may communicate the electric motor with the outside so that the electric motor may be supplied with outside air. The cooling air duct can be designed completely independently of the suction air duct. It is thereby ensured that air which may be too humid or contaminated with dust particles is not supplied to the motor for cooling. Ambient air can be drawn in by the electric motor itself, for example by a further fan wheel.

An air inlet and an air outlet of the cooling air channel can be provided on the housing, wherein the air inlet can be covered by at least one wheel. The cooling air duct then enters the housing at the air inlet, where ambient air is drawn in and exits the housing at the air outlet. If the air inlet is covered by at least one wheel, it is ensured that the air inlet is not blocked by objects or dirt located at the periphery of the cleaner. It is then particularly advantageous if the relevant wheel is fixed on a rigid shaft which cannot pivot relative to the housing. The wheel can also be arranged in the housing, for example, flush with the housing surface of the housing. The air inlet and air outlet may be formed by a plurality of slits in the housing.

The cleaner may comprise a suction hose, a suction nozzle arranged on the suction hose and a reel arranged inside the housing, the reel carrying a cable for powering the cleaner. The suction hose may be provided directly at the suction air inlet. The reel may be coupled with a spring which creates a torque of the reel and by means of which the cable is allowed to be wound onto the reel.

Drawings

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Figure 1 shows a vacuum cleaner in perspective view;

figure 2 shows the cleaner in side elevation;

figure 3 shows the cleaner in elevation;

figure 4 shows the cleaner in longitudinal section;

FIG. 5 illustrates the liquid filter in a first perspective view;

FIG. 6 shows the liquid filter in a second perspective view;

FIG. 7 illustrates the liquid filter in a third perspective view;

FIG. 8 illustrates the liquid filter in a fourth perspective view;

figure 9 shows the cleaner in a first partial view;

figure 10 shows the cleaner in a second partial view;

figure 11 shows the cleaner in a third partial view;

figure 12 shows the cleaner in a first partial cross-sectional view;

figure 13 shows the cleaner in a second partial cross-sectional view;

FIG. 14 shows the diffuser in perspective view;

FIG. 15 shows the grid in perspective view;

fig. 16 shows the dry filter in a perspective view.

Detailed Description

The overview of fig. 1-13 shows the cleaner 10 in different views. The cleaner 10 comprises a housing 11, a liquid filter 12 and a turbine 13. The liquid filter 12 and the turbine 13 are arranged inside the housing 11, as can be seen from fig. 4. A suction air inlet 14 for connection to a suction hose, not shown in detail here, and a suction air outlet 15, which are connected via a suction air channel 16 running inside the housing 11, open out in the housing 11. Here, the suction air channel 16 extends through the liquid filter 12 and the turbine 13. The turbine 13 is formed by an electric motor 17 with a fan wheel 18. During operation of the turbine 13, air is sucked in via a suction hose or suction air inlet 14 and a suction air flow is formed in a suction air channel 16.

The housing 11 is further provided with a housing opening 19 for removing the liquid filter 12 from the housing 11, and a housing cover 20 which covers the housing opening 19. The liquid filter 12 is constituted by a liquid container 21, a jet pump 22, a diffuser 23, and a grill 24 or a shaking frame. The suction air channel 16 is partially formed by a jet pump 22 and a diffuser 23, and passes through the liquid container 21.

The cleaner 10 also has a carrying handle 25 on the housing 11 for manually transporting the cleaner 10, and wheels 26 and 27 rotatably secured to a bottom surface 28 of the housing 11 and allowing the cleaner 10 to be moved along the floor. In addition, switches 29 and 30 are provided on the housing 11 for operating or controlling the functions of the cleaner 10. In addition, a coupling piece 31 is provided for connecting a liquid line, not shown, which allows liquid to be transported from the liquid container 21 to a vacuum cleaner nozzle, not shown here.

The jet pump 22 is configured with a plurality of venturi nozzles 32, which are connected to the liquid container 21 via two liquid lines 33, so that liquid is sucked off from the bottom 34 of the liquid container 21 and is conveyed to the venturi nozzles 32. After the ejector pump 22, the diffuser 23 is formed by the space 35 inside the liquid container 21. Where the pressure increase takes place and the speed of the suction air flow is reduced. Through the venturi nozzle 32, liquid or water is mixed into the suction air flow or sprayed therein, wherein dust particles which are not visible here are wetted with the liquid or deposited in a liquid sump, not shown here in detail, within the liquid filter 12. In particular, the electric motor 17 with the fan wheel 18, the ejector pump 22 with the diffuser 23 and the suction air channel 16 are configured such that dust particles are optimally combined with the liquid and air drying takes place in the liquid filter 12. At the same time, a particularly high suction capacity is achieved at the vacuum cleaner nozzle.

Furthermore, the liquid filter 12 has a droplet separator 36, which is designed in the form of a wall 37 with a filter 38. The droplet separator 36 or the wall 37 is pushed vertically into the liquid filter 12 or the liquid container 21, so that a first region 39 for receiving dirty liquid and a second region 40 for receiving clean liquid are formed in the liquid container 21.

The liquid receptacle 21 also includes a grid 24 that is inserted into the liquid receptacle 21 at or above the liquid pool. The grille 24 is formed by crosswise extending vertical web strips 41 which prevent the liquid in the liquid container 21 from sloshing around when the cleaner 10 is moved. To clean the liquid container 21, the grid 24 can simply be removed and replaced. A float body 42 is pivotably fastened to the grating 24, and can close an opening 43 in the liquid container 21 when the float body 42 is floated by the liquid in the liquid container 21. The suction air channel 16 extends through the opening 43, thus ensuring that no liquid from the liquid container 21 enters the subsequent suction air channel 16 in the flow direction of the suction air flow.

After the liquid filter 12, in the suction air channel 16 and before the turbine 13, a suspended matter filter 44 is arranged, which filters out dust particles still present in the suction air. Furthermore, a cooling air channel 45 is formed inside the housing 11, via which cooling air can be supplied to the electric motor 17 for cooling. The cooling air duct 45 is designed independently of the suction air duct 16. In particular, the air inlet 46 of the cooling air channel 45 is configured such that it is covered by one of the wheels 26.

A latching device 47 is formed on the housing cover 20, which latching device has a linearly displaceable spring-loaded latching element 48 that, in the closed position of the housing cover 20, engages in a tab 49 at the housing opening 19. The latching device 47 also has a lever 50 for actuating the latching element 48, which lever is arranged flush with a housing surface 51 of the housing 11. The actuating lever 50 is arranged on the housing cover 20 so as to be pivotable about an axis which is not shown in detail here, and forms a cam 52 which engages in an indent 53 in the latching element 48. The recess 53 is configured such that manually swinging the lever 50 about the axis causes the projection 52 to move on an inner side 54 of the recess 53, wherein in said movement the latch 48 moves linearly and releases the tab 49, and the housing cover 20 can then be opened. When the housing cover 20 is closed, the latch 48 slides along the ramp 55 formed on the latch 48 on the web 49, so that the latch 48 is retracted in a linear direction against the spring force. The recess 53 is now dimensioned such that the projection 52 is located inside the recess 53 during said movement of the latch 48, while the lever 50 does not move. Thus, closure housing cover 20 does not require manipulation or movement of lever 50.

The housing cover 20 is swingably fixed to the housing 11 with a hinge 56. The hinge 56 is constituted by a cylindrical ring belt 57 and a shaft 58 rotatably disposed therein. As can be seen from fig. 13, the cylindrical ring belt 57 is of substantially circular ring-shaped configuration and has an open section 59 which allows the shaft 58 to be removed in a radial direction with respect to the cylindrical ring belt 57. Furthermore, a cover receptacle 60 of the housing 11, which is formed with a bend 61, partially surrounds the hinge 56. The bend 61 is arranged appropriately relative to the housing cover 20, so that the shaft 58 is held in the cylindrical ring band 57 in a form-fitting manner in the closed position shown here. Even when the housing cover 20 is opened into the maximum opening position, not shown here, the shoulder 62 of the housing cover 20 rests against the bend 61, thereby fixing the shaft 58 in the cylindrical ring belt 57. Conversely, if the housing cover 20 is brought into an upright position, the shaft 58 can be removed from the cylindrical ring 57 in the radial direction, since then a sufficiently large clearance for removal is formed between the bend 61 and the housing cover 20.

FIGS. 14-16 show the diffuser 23, grille 24 and dry filter 63 separately. The diffuser 23, the grill 24, and the dry filter 63 may be alternately loaded into the liquid container 21. If the cleaner 10 includes a grill 24 and a dry filter 63 in addition to the diffuser 23, the cleaner 10 can be used for different purposes.

Claims (25)

1. Vacuum cleaner (10) comprising a housing (11), a liquid filter (12) and a turbine (13), wherein a suction air inlet (14) for connecting a suction hose and a suction air outlet (15) are formed on the housing, wherein a suction air channel (16) is formed inside the housing, wherein the suction air channel connects the suction air inlet to the suction air outlet via the liquid filter and the turbine, wherein the turbine is formed by an electric motor (17) with a fan wheel (18) for forming a suction air flow in the suction air channel, wherein the housing is provided with a housing opening (19) for removing the liquid filter from the housing and a housing cover (20), the housing cover covers the housing opening, wherein the liquid filter is formed by a liquid container (21), a jet pump (22) and a diffuser (23), wherein the liquid container, the jet pump and the diffuser partially form the suction air channel, wherein liquid can be sucked from the liquid container by means of the jet pump, can be conveyed into the suction air flow, can be sprayed into the diffuser and can be deposited in the liquid container, wherein the vacuum cleaner has a lifting handle (25) for manually conveying the vacuum cleaner, wherein the vacuum cleaner has at least three wheels for moving the vacuum cleaner over a floor surface, wherein the vacuum cleaner has a control (29, 30) on the housing for controlling the function of the vacuum cleaner.

2. Vacuum cleaner according to claim 1, characterized in that the dimensioning of the electric motor (17) with the fan wheel (18), the jet pump (22) with the diffuser (23) and the suction air channel (16) is selected in each case such that a volume flow can be created in the suction air channel with the turbine (13), such that dust is combined with liquid and air drying takes place in the liquid filter (12) with optimum efficiency.

3. Vacuum cleaner according to claim 1 or 2, characterized in that the jet pump (22) is configured with a plurality of venturi-nozzles (32) which are connected to the liquid container (21) by means of at least one liquid line (33).

4. Vacuum cleaner according to claim 1, characterized in that the diffuser (23) is configured in the liquid container (21), wherein the suction air channel (16) is configured with an air guiding surface in order to divert the suction air flow.

5. A vacuum cleaner as claimed in claim 1, characterized in that in the liquid container (21) in the suction air channel (16) a droplet separator (36) is arranged, wherein the droplet separator is designed as a filter (38) with a sieve or a filter cloth, wherein the droplet separator forms a wall (37) in the liquid container which divides the liquid pool into a first region (39) for receiving dirty liquid and a second region (40) for receiving cleaning liquid.

6. A vacuum cleaner as claimed in claim 5, characterized in that the droplet separator (36) is designed to be removable from the liquid filter (12).

7. Vacuum cleaner according to claim 5 or 6, characterized in that the ejector pump (22) is connected to the second region (40) of the liquid container (21) via a suction line for sucking liquid.

8. A vacuum cleaner as claimed in claim 1, characterized in that the diffuser (23) is taken out of the liquid container (21) and a grille (24) for limiting the movement of liquid located in the liquid container is introduced into the liquid container, wherein the grille is arranged in the liquid container parallel to the level of the liquid.

9. Vacuum cleaner according to claim 8, characterized in that a float (42) is pivotably fastened to the grille (24), wherein the suction air channel (16) of the liquid container (21) can be closed off by means of the float depending on the liquid pool.

10. A vacuum cleaner according to claim 1, wherein the diffuser (23) is removed from the liquid container (21) and a dry filter (63) is incorporated into the liquid container for filtering air flowing through the dry filter.

11. A vacuum cleaner according to claim 1, characterized in that the housing cover (20) is swingably fixed to the housing (11) by means of a hinge (56).

12. A vacuum cleaner as claimed in claim 11, characterized in that the hinge (56) is formed by a cylindrical ring belt (57) and a shaft (58) rotatably arranged therein, wherein the cylindrical ring belt is configured with a section (59) which is partially open, so that the shaft can be taken out of the cylindrical ring belt or can be inserted therein in a radial direction relative to the cylindrical ring belt.

13. Vacuum cleaner according to claim 12, characterized in that the housing cover (20) or a cover receptacle (60) which is formed in the housing (11) and partially surrounds the hinge (56) is formed with a bend (61), wherein the bend is arranged relative to the housing cover or the cover receptacle such that the shaft (58) is held in the cylindrical ring belt (57) in a form-fitting and rotatable manner in the closed position and in the maximally open position of the housing cover.

14. Vacuum cleaner according to claim 13, characterized in that the shaft (58) is removable from or insertable into the cylindrical ring belt (57) in the vertical open position of the housing cover (20).

15. Vacuum cleaner according to claim 1, characterized in that the housing cover (20) is configured with a latching device (47) for positively locking the housing cover on the housing (11).

16. Vacuum cleaner according to claim 15, characterized in that the latching device (47) is designed with a linearly displaceable latch (48) which is spring-loaded and which, in the closed position of the housing cover, engages a tab (49) at the housing opening or on the housing cover (20), and with a lever (50) for actuating the latch, wherein the lever is arranged flush with a housing surface (51) on the housing (11).

17. Vacuum cleaner according to claim 16, wherein the actuating lever (50) is pivotably arranged about an axis at the housing opening (19) or on the housing cover (20), wherein the actuating lever or the latching element (48) is designed with at least one projection (52) which engages in at least one recess (53) provided in the latching element or the actuating lever.

18. A vacuum cleaner according to claim 17 wherein the recess (53) and the projection (52) are configured such that manual swinging of the lever (50) about the axis causes the projection to move on an inner side (54) of the recess (53) and thereby causes linear movement of the latch member (48) relative to the web (49) such that the latch member releases the web.

19. Vacuum cleaner according to claim 17 or 18, characterized in that the displacement of the cam (52) inside the recess (53) is enabled when the housing cover (20) is displaced into the closed position and before the latching of the latch (48) with the tab (49) in the closed position, wherein the lever (50) remains stationary.

20. A vacuum cleaner as claimed in claim 1, characterized in that the turbine (13) is arranged in the suction air channel (16) downstream of the liquid filter (12) in the direction of flow of the suction air stream.

21. Vacuum cleaner according to claim 20, characterized in that a suspended matter filter (44) is provided in the suction air channel (16), wherein the suspended matter filter is arranged downstream of the liquid filter (12) and before the turbine (13) in the flow direction of the suction air flow.

22. Vacuum cleaner according to claim 21, characterized in that the suspended matter filter (44) is a HEPA-filter.

23. Vacuum cleaner according to claim 1, characterized in that a cooling air channel (45) is formed inside the housing (11), wherein the cooling air channel connects the electric motor (17) to the outside, so that the electric motor can be supplied with outside air.

24. Vacuum cleaner according to claim 23, characterized in that an air inlet (46) and an air outlet of the cooling air channel (45) are provided in the housing (11), wherein the air inlet is covered by at least one of the wheels.

25. A vacuum cleaner as claimed in claim 1, characterized in that the vacuum cleaner (10) comprises a suction hose, a suction nozzle arranged on the suction hose and a reel arranged inside the housing (11) with a cable for supplying power to the vacuum cleaner.

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