EP3496585B1 - Wet cleaning device with a cleaning roller - Google Patents

Description

Field of technology

The invention relates to a wet cleaning device with a cleaning roller rotatably mounted about a roller axis and a roller cover at least partially surrounding the cleaning roller in the circumferential direction.

The invention also relates to a device for regenerating a cleaning roller of a damp cleaning device, in particular a base station for receiving a partial area of a damp cleaning device having a cleaning roller, the device having a roller cover for at least partially surrounding the cleaning roller in the circumferential direction.

The invention also relates to a system consisting of such a device and such a wet cleaning device.

In addition, the invention also relates to a method for regenerating a cleaning roller of a damp cleaning device, the cleaning roller being surrounded at least in the circumferential direction with a roller cover for a regeneration operation and being rotated around a roller axis, with liquid being thrown from the cleaning roller onto an inner wall of the roller cover.

State of the art

Damp cleaning devices of the aforementioned type are known in the prior art.

The DE 102 29 611 B3 discloses, for example, a wet cleaning device with a wiping body which can be driven to rotate about an axis of rotation, in which a cleaning liquid is taken from a storage tank and sprayed onto the surface of the wiping body by means of spray nozzles arranged in the direction of the axis of rotation of the wiping body. The wiping body moistened in this way is guided over a surface to be cleaned during a wiping operation, the wiping body picking up dirt from the surface to be cleaned.

During the wiping operation, the wiping body is increasingly covered with dirt, so that regeneration is necessary. For this purpose, the wiping body is lifted from the surface to be cleaned, surrounded by a housing and sprayed with unused cleaning fluid. The wiper body rotates so that cleaning liquid and dirt are expelled from the wiper body, hit the inside of the housing and are transferred to a collecting container for dirty liquid.

Summary of the invention

Based on the prior art mentioned above, the object of the invention is to further develop a damp cleaning device in such a way that the transport of liquid within the roller cover is improved, in particular also with regard to faster drainage of the liquid.

To solve the aforementioned problem, it is proposed that the roller cover at least on a partial area of an inner wall of the Roller cover has a partial section of a flow guide structure which winds helically in the axial direction.

According to the invention, the roller cover now has a flow guide structure on the inside, which guides the liquid in a targeted manner within the roller cover. For this purpose, the flow guide structure follows a helical shape with a plurality of turns, which merge into one another and can thus convey liquid within the flow guide structure. In contrast to a conventional non-structured inner wall of the roller cover, the liquid discharged by the cleaning roller now receives an impulse in a conveying direction when it hits the windings, which impulse corresponds to the course of the windings in the axial direction of the roller cover. The liquid can thus be drained off in a more directed and faster manner than in the prior art, so that the regeneration of the cleaning roller can take place overall faster and with a better regeneration result. Since the flow guide structure is wound helically around the roller axis, the directional transport of the liquid takes place parallel to the roller axis. The slope of the helically winding flow guide structure is advantageously constant in a direction parallel to the roller axis. However, it is also possible to provide a variation in the pitch of the windings in certain axial partial areas of the inner wall, for example in order to locally change the flow velocity of the liquid.

If the roller cover of the wet cleaning device only partially surrounds the cleaning roller in the circumferential direction, ie only covers a certain angular range in the circumferential direction, the flow guide structure on the inner wall of the roller cover is also designed so that the partial section of the flow guide structure is formed with a corresponding Flow structure of a second roller cover, which is provided for example by a base station for the wet cleaning device, can supplement the screw shape. In that case, the roller cover completely surrounding the cleaning roller in the circumferential direction is composed of a plurality of parts which each provide parts of the turns of the flow guide structure. However, it is also possible for the damp-cleaning device to provide the entire roller cover, for example in the form of two semi-cylinders that can be displaced relative to one another.

Basically, in the context of the invention, the term wet cleaning device is to be understood as meaning devices which exclusively or among other things also enable wet cleaning. These include, on the one hand, hand-held and automatically movable damp cleaning devices, in particular cleaning robots, and, on the other hand, combined dry and damp cleaning devices which can also perform dry cleaning in addition to damp cleaning. In addition to the usual floor cleaning devices for cleaning a floor, wet cleaning devices for cleaning above-floor surfaces are also meant. These include, for example, devices for cleaning windows, cleaning shelves, steps, baseboards, edges and the like.

The cleaning roller can be a roller surrounded by a cleaning lining, the cleaning lining in particular having a microfiber. The regeneration operation of the wet cleaning device for regenerating the cleaning roller can preferably take place autonomously, so that no additional work is caused for the user of the wet cleaning device. A sensor system of the wet cleaning device can preferably detect a degree of soiling of the cleaning roller and, depending on this, initiate a regeneration operation if necessary. If the regeneration operation is carried out completely only in the wet cleaning device itself, the amount of available liquid is limited in order not to increase the size of the wet cleaning device excessively. If the cleaning roller arranged in the damp cleaning device is carried out with the aid of an external device, preferably a base station for the damp cleaning device, the size of the external device is less relevant and the stored liquid volume can be larger. When using an external device for regeneration, the damp cleaning device can preferably also be retracted with a partial area into the device and / or placed on a partial area of the device, so that the cleaning roller can be housed in a combination of a roller cover of the device and the roller cover of the damp cleaning device.

It is also proposed that the roller cover of the wet cleaning device has a displaceable cover element for optionally closing and / or exposing an opening area of the roller cover, an inner wall of the cover element having a partial section of the flow guide structure. According to this embodiment, the roller cover of the wet cleaning device consists of two or more roller cover parts, of which a first roller cover part can be fixedly arranged on a housing of the wet cleaning device and a further roller cover part is a displaceable cover element which can be displaced relative to the fixed roller cover part. The roller cover can thus be closed or released by moving the cover element either in the circumferential direction, on the one hand to enable the cleaning roller to be placed on a surface to be cleaned during a wiping operation and on the other hand to enclose the cleaning roller completely in the circumferential direction by means of the roller cover for a regeneration operation to reach. The cover element is preferably moved by pivoting. Alternatively, however, a linear displacement, for example along a rail or the like, is also possible. All roller cover parts and thus also the displaceable cover element with their partial cutouts form a common flow guide structure for guiding the liquid discharged from the cleaning roller on the inner wall of the roller cover. Because a complete housing of the cleaning roller can be achieved within the damp cleaning device in the circumferential direction, the damp cleaning device can carry out the regeneration operation without the aid of a base station or other device for regeneration. Thus, the damp cleaning device itself has its own device for regenerating the cleaning roller, including possibly further components, such as a liquid application device for moistening the cleaning roller, in particular liquid nozzles, waste water channel, waste water tank and the like.

It is proposed that at least a partial area of a circumferential surface of the cleaning roller have mechanical contact with the flow guide structure. As a result, the cleaning roller rubs completely or with at least a partial area of its peripheral surface on the inner wall of the roller cover during the rotation. This creates a mechanical effect of the flow guide structure on the circumferential surface of the cleaning roller. The circumferential surface of the cleaning roller, ie the cleaning coating of the cleaning roller, is compressed and relieved again by the windings of the flow guide structure. As a result of this additional action on the circumferential surface, the cleaning roller can be regenerated with a lower amount of liquid compared to the prior art. The total consumption of liquid during the regeneration operation can be, for example, only 25 ml. So that the peripheral surface of the cleaning roller has mechanical contact with the flow guide structure, It is advisable to have an outer diameter of the cleaning roller or of the cleaning coating which is larger than the inner diameter of the roller cover so that the flow guide structure can come into engagement, for example, with the fibers of the cleaning roller.

The roller cover preferably has a liquid outlet opening at its end relative to an axial direction, which in particular has a flow connection to a liquid tank. Since the flow guide structure conveys the liquid located inside the roller cover parallel to the roller axis, the conveyance also takes place in the direction of the liquid outlet opening and can be transferred from there to a liquid tank, in particular a dirty liquid tank. The liquid thus reaches a liquid tank proceeding from the roller cover, so that a user of the wet cleaning device does not have to come into contact with the liquid. In addition, leakage of liquid on the freshly cleaned surface is also avoided. In addition, an air inlet opening can be provided on the end faces of the cleaning roller, so that the rotation of the cleaning roller generates an air flow which can support the liquid thrown off by the cleaning roller to the liquid outlet opening of the roller cover. It goes without saying that the liquid outlet opening is arranged on that end side of the roller cover which corresponds to the conveying direction of the flow guide structure which is dependent on the direction of rotation of the cleaning roller. If the cleaning roller can be rotated in opposite directions of rotation during the regeneration operation (or possibly also during the wiping operation), liquid outlet openings on both end sides of the roller cover are recommended.

It is further proposed that a displaceable adjusting element is arranged at least between two turns of the flow guiding structure, which can be displaced from an open position that releases one turn for the continuous flow into a subsequent turn into a disconnected position preventing the continuous flow, the adjusting element in particular being rotatable and / or is pivotable. The proposed adjusting element can switch over a flow path of the liquid within the flow guide structure like a switch. In this way, the continuous, helically wound flow guide structure can either be interrupted or released. For example, liquid flowing within a turn can be guided in such a way that it remains within the same turn, for example, without advancing in the axial direction. In a first position, the open position, the adjusting element is preferably aligned parallel to the direction of flow of the liquid within the respective turn, so that the liquid can flow along the flow guide structure unimpeded following the course of the turn. In a second position, the disconnected position, on the other hand, the adjusting element is shifted into the flow path of the liquid, so that the liquid cannot follow the helical shape further in the axial direction, but rather is guided back into the previous turn and thus essentially annular between two adjacent ones Windings flows. Likewise, it is also possible for the adjusting element in an open position to allow the liquid to flow in an axially advancing direction, but to switch a flow path in which a turn is skipped. This accelerates the removal of the liquid inside the roller cover.

It is particularly advisable for the flow guide structure to have a plurality of adjusting elements which are arranged in adjacent turns. The adjusting elements can be pivoted in the manner of a Be formed flap, or be arranged, for example, on a rotatable rotary element. For example, it is also possible for two or more adjusting elements to be arranged on the same rotary element in order to achieve a desired switch position between the turns.

In particular, it is proposed that the actuating element can be displaced by means of an actuator, the flow guide structure in particular having a plurality of actuating elements which can be displaced simultaneously by means of a common actuator. As a result of this configuration, several or all of the actuating elements can be displaced simultaneously by a common actuator via a mechanical coupling. The actuator can in particular be an electric motor which can act on all adjusting elements or rotating elements via a mechanism. The more adjusting elements are used within the flow guide structure, the more uniformly the presence or the speed of the liquid can be adjusted over the axial length of the roller cover. The success of the regeneration of the cleaning roller is therefore particularly homogeneous over the longitudinal extent of the cleaning roller. By moving all the actuating elements into the separated position, an intensive washing process of the cleaning roller is advantageously triggered during the regeneration operation, since the liquid or the respective liquid components remain in the respective winding and interact several times with the same axial section of the circumferential surface of the cleaning roller. Only when the adjusting elements are moved back into the open position can the liquid be transferred into the subsequent turn and continue to follow the helical flow guide structure. In addition to the liquid already present in the cleaning roller, additional liquid can also be poured into the roller housing, for example discharged onto the cleaning roller with the aid of spray nozzles, so that the peripheral surface of the cleaning roller is like in a washing machine is moved through the liquid standing in the roller cover at a lowest point.

It is also proposed that a width of a turn of the flow guide structure can be changed. For this purpose, the flow guide structure can in particular be formed at least partially from a flexible material and / or can be adjusted with regard to the width of the winding by means of an actuator. By increasing or decreasing the width of the turn, the distance between the adjacent turns can be increased or decreased, which leads to a change in the pitch of the helical shape of the flow guide structure. This affects the speed of the liquid within the flow guide structure. In addition, the reduction or enlargement of the flow path within the winding leads to an increase or decrease in the local flow velocity. In a particularly simple embodiment, the inner wall of the roller cover or the roller cover can be made entirely of a flexible material, preferably an elastic plastic, and can be pulled apart or pushed together in the area of certain turns by means of a sliding mechanism, for example, so that the turns concerned are stretched or compressed will. Alternatively, the flow guide structure can also be designed in the manner of a bellows. A sliding mechanism engaging the flow guide structure can either be assigned to only one specific turn or also to several turns.

In addition to the proposed damp cleaning device, a device for regenerating a cleaning roller of a damp cleaning device is also proposed, which device is in particular a base station for receiving a partial area of a cleaning roller Damp cleaning device is. It is proposed that this device have a roller cover for at least partially surrounding the cleaning roller in the circumferential direction, the roller cover having a partial section of a flow guide structure which winds helically in the axial direction at least on a partial area of an inner wall of the roller cover.

The proposed device can, for example, be a device designed separately from the wet cleaning device, or alternatively also a device arranged in the wet cleaning device itself. The device is particularly preferably an independent base station into which a damp cleaning device can be introduced, at least with a partial area. However, it is also possible for the cleaning roller to be removed from the damp cleaning device and to be fed to the device, in particular to a device which is separate from the damp cleaning device. The proposed device has a roller cover which either only partially or completely surrounds the cleaning roller in the circumferential direction. This roller cover has, at least in a partial area of its inner wall, a partial section of a flow guide structure previously proposed in relation to the wet cleaning device. If the device is, for example, a base station into which a partial area of the wet cleaning device including the cleaning roller and the roller cover of the wet cleaning device is inserted, the roller cover is made up of the roller cover of the wet cleaning device and the roller cover of the regeneration device, in particular the base station, in the circumferential direction, together. The windings of the flow guiding structure are thus provided for one part (in particular an angular range) by the damp cleaning device and another part by the regeneration device. Overall, the cleaning roller is completely enclosed in the circumferential direction.

Furthermore, the invention proposes a system comprising a device, in particular the device described above, and a damp cleaning device of the aforementioned type, the roller covers of the device and the damp cleaning device corresponding to one another in terms of their shape in such a way that the cleaning roller is completely removed from the circumferential direction Roller covers can be surrounded and the partial sections of the flow guide structure on both sides complement one another to form a continuous, helically winding overall structure. In particular, the wet cleaning device can have all of the features explained above, particularly preferably a mechanical contact between the peripheral surface of the cleaning roller and the flow guide structure, a roller cover with liquid outlet openings, adjusting elements and the like. The advantages of the system result as explained above with regard to the regeneration device or the wet cleaning device.

Finally, the invention also proposes a method for regenerating a cleaning roller of a damp cleaning device, the cleaning roller being surrounded at least in the circumferential direction with a roller cover for a regeneration operation and being rotated around a roller axis, with liquid being thrown from the cleaning roller onto an inner wall of the roller cover and there flows along a flow guiding structure which winds helically in the axial direction, in particular towards a liquid outlet opening of the roller cover. The liquid thrown off from the circumferential surface of the cleaning roller and / or optionally also additionally sprayed onto the surface of the cleaning roller is guided on the inner wall of the roller cover depending on the direction of rotation of the cleaning roller by means of the flow guide structure and is thus specifically conveyed within the roller cover, namely in the axial direction, which is given by the helical coil. The flow guide structure can additionally when in contact with the circumferential surface of the cleaning roller, serve to act mechanically on the cleaning roller, in that the circumferential surface is cyclically compressed and relieved when the cleaning roller rotates. The residence time of the liquid in individual turns of the flow guiding structure can be influenced by displaceable adjusting elements, which force the liquid within the flow guiding structure into certain orbits, for example onto a recurring ring-shaped path of a winding or by jumping over a winding using an adjusting element. In particular, it is also proposed that the flow guide structure be changed in terms of its slope with the aid of flexible windings. This can be achieved, for example - as already explained above - by widening or compressing one or more turns. The stretching or compression can be achieved by the mechanical action of an actuator.

Furthermore, it is proposed that the cleaning roller is completely surrounded by the roller cover and liquid is additionally introduced into the volume surrounded by the roller cover until the cleaning roller is immersed in the liquid with a circumferential section that is deepest in relation to a vertical direction, in particular with an immersion depth of approx. 1 mm to 10 mm. The cleaning roller thus rotates within the roller cover, which is partly filled with liquid, through the liquid, as is customary, for example, in a washing machine. If necessary, the cleaning roller can also be sprayed with liquid. Dirt and liquid are thrown by the centrifugal force generated during the rotation of the cleaning roller against the inner wall of the roller cover and thus also against the flow guide structure and, depending on the current position of one or more adjusting elements, are preferably held in a certain axial section of the roller cover for a certain period of time. During the regeneration is continuous a peripheral portion of the cleaning roller is immersed in the liquid standing in the roller cover, so that the fibers of a cleaning pad are gradually washed out as the cleaning roller rotates. In order to ensure that the fibers or the circumferential section of the cleaning roller are submerged, additional amounts of liquid of approx. 25 ml based on a cleaning roller with a diameter of 45 mm and a length of 240 mm are used, depending on the absorption capacity of the cleaning lining, so that a Immersion depth of approx. 4 mm can be achieved. During the washing process, the cleaning roller can be rotated at a rotational speed of, for example, 1500 revolutions per minute to 6000 revolutions per minute, in particular 4500 revolutions per minute. However, significantly lower rotational speeds, for example from 300 revolutions per minute to 450 revolutions per minute, may also be possible by increasing the dwell time of the cleaning roller in a specific rotational position. Overall, a particularly effective regeneration process for the cleaning roller is thus created.

Brief description of the drawings

Fig. 1

ein erfindungsgemäßes Feuchtreinigungsgerät,

Fig. 2

einen Teilbereich des Feuchtreinigungsgerätes mit einer Walzenabdeckung und einer Reinigungswalze während eines Wischbetriebs,

Fig. 3

den Teilbereich des Feuchtreinigungsgerätes während eines Regenerationsbetriebs,

Fig. 4

eine perspektivische Prinzip-Skizze einer Walzenabdeckung,

Fig. 5

eine Strömungsführungsstruktur einer Walzenabdeckung mit Stellelementen in einer Öffnungsstellung,

Fig. 6

eine Abwicklung (Prinzip-Skizze) der Strömungsführungsstruktur gemäß Figur 5,

Fig. 7

die Strömungsführungsstruktur mit Stellelementen in einer Trennstellung,

Fig. 8

eine Abwicklung (Prinzip-Skizze) der Strömungsführungsstruktur gemäß Figur 7,

Fig. 9

eine Strömungsführungsstruktur gemäß einer zweiten Ausführungsform in einer Öffnungsstellung,

Fig. 10

die Strömungsführungsstruktur gemäß Figur 9 in einer Trennstellung,

Fig. 11

eine perspektivische Ansicht einer Innenwandung einer Walzenabdeckung mit gestauchten bzw. gestreckten Windungen.

The invention is explained in more detail below on the basis of exemplary embodiments. Show it:

Fig. 1

a wet cleaning device according to the invention,

Fig. 2

a partial area of the damp cleaning device with a roller cover and a cleaning roller during a wiping operation,

Fig. 3

the partial area of the wet cleaning device during a regeneration operation,

Fig. 4

a perspective principle sketch of a roller cover,

Fig. 5

a flow guide structure of a roller cover with adjusting elements in an open position,

Fig. 6

a development (principle sketch) of the flow guide structure according to Figure 5 ,

Fig. 7

the flow guide structure with adjusting elements in a disconnected position,

Fig. 8

a development (principle sketch) of the flow guide structure according to Figure 7 ,

Fig. 9

a flow guide structure according to a second embodiment in an open position,

Fig. 10

the flow guide structure according to Figure 9 in a disconnected position,

Fig. 11

a perspective view of an inner wall of a roll cover with compressed or stretched turns.

Description of the embodiments

Figure 1 shows a damp cleaning device 1, which is designed here as a damp mopping device with a base device 22 and an attachment 23. At A handle 25 with a handle 26 is arranged on the base device 22, by means of which a user can guide the wet cleaning device 1 over a surface to be cleaned. The handle 25 is advantageously designed to be telescopic, so that a user can adjust the height of the wet cleaning device 1 to his body size. During a normal wiping operation, the user shifts the wet cleaning device 1 in a back and forth movement over the surface to be cleaned, alternately pushing the wet cleaning device 1 away from him and towards him.

A tank (not shown) for cleaning fluid is arranged in the attachment 23. Liquid can be filled into the tank via a filler neck 24. A cleaning roller 3, which can be rotated about a roller axis 2, is also arranged in the attachment 23. The roller axis 2 is essentially perpendicular to a normal direction of movement of the dampening cleaning device 1. The liquid can be dispensed from the tank onto the surface of the cleaning roller 3 in order to moisten it.

During a wiping operation, the cleaning roller 3 rotates about the roller axis 2, so that the peripheral surface of the cleaning roller 3 continuously rolls on the surface to be cleaned. The cleaning roller 3 is usually wrapped with a cleaning covering, preferably a microfiber covering, optionally with an additional sponge body interposed. During the wiping operation, dirt continuously accumulates on a peripheral surface of the cleaning roller 3. Therefore, after a certain period of operation, it may be necessary to regenerate the cleaning roller 3, with dirt and fluid loaded with dirt being removed from the cleaning roller 3 during a regeneration operation. For this purpose, the cleaning roller 3 is rotated and dirt and dirt acted upon Liquid thrown off the cleaning roller 3. The thrown off liquid can be collected and fed to a collecting container.

Figure 2 shows a partial area of the wet cleaning device 1, which has the cleaning roller 3. The cleaning roller 3 is assigned a roller cover 4 in the circumferential direction, which has an opening area 8 which can be closed with a displaceable cover element 7 of the roller cover 4. In the illustration shown, the roller cover 4 is in an open position during a wiping operation of the damp cleaning device 1. The opening area 8 is open and the cover element 7 is shifted into the attachment 23 so that the cleaning roller 3 is not completely surrounded by the roller cover 4 in the circumferential direction . The roller axis 2 of the cleaning roller 3 is at the same time also the axis of rotation for the displacement of the cover element 7. The roller cover 4 has an inner wall 5 facing the cleaning roller 3.

Figure 3 shows the in Figure 2 The illustrated partial area of the wet cleaning device 1 during a regeneration operation in which the cleaning roller 3 is completely enclosed by the roller cover 4 in the circumferential direction. The cover element 7 is displaced into the opening area 8 and completely closes it. At the same time, the cleaning roller 3 is also lifted off the surface to be cleaned, that is to say is shifted into the front attachment 23, which is achieved by a mechanism of the damp cleaning device 1, not shown.

Figure 4 shows a view into the roller cover 4 (without cleaning roller). The roller cover 4 forms an enclosure that is completely closed in the circumferential direction. On the inner wall 5 of the roller cover 4 a flow guide structure 6 is formed, which has a plurality of turns 9 to 12. This flow guide structure 6 forms a helical shape which continues in the axial direction and which is formed on the one hand on the cover element 7 and on the other hand on the other regions of the roller cover 4. The turns 9 to 12 merge into one another and have a continuous pitch and helical shape.

As in the Figures 2 to 4 As shown, the cleaning roller 3 and the roller cover 4 can be designed corresponding to one another in such a way that the peripheral surface of the cleaning roller 3 touches the inner wall 5 of the roller cover 4. In this case, the flow guiding structure 6 acts mechanically on the cleaning roller 3 and compresses and relieves the circumferential surface by means of the successive turns 9 to 12. In relation to the embodiment shown here, the cleaning roller 3 rotates clockwise, thereby promoting the liquid thrown off by the cleaning roller 3 as in the in Figure 4 The principle sketch shown on the right is carried out. The roller cover 4 advantageously has a liquid outlet opening (not shown) at both end regions, through which the liquid can leave the roller cover 4 in the direction of a liquid tank.

The Figures 5 to 8 show a first embodiment of the invention in which the flow guiding structure 6 has adjusting elements 13, 14 between successive turns 9 to 12. The adjusting elements 13, 14 are arranged one behind the other in the circumferential direction in the course of the turns 9, 12 which merge into one another, so that in the Figures 5 and 7th not all control elements are visible. The adjusting elements 13, 14 are flap elements which are arranged in a wall element between windings 9 to 12 arranged next to one another and which can be displaced, namely pivoted, relative to the walls. The shift takes place for all control elements 13, 14 at the same time by means of an actuator, not shown, which preferably acts mechanically on the adjusting elements 13, 14. In the illustrations, liquid thrown off by the cleaning roller 3 flows from right to left through the roller cover 4 and thus flows through the windings 12, 11, 10, 9 one after the other (in this order), see principle sketch on the left. According to the situation in Figure 5 the adjusting elements 13, 14 are not shifted into the flow path formed by the windings 9 to 12, so that the liquid can flow unhindered from one winding 10 to 12 into the subsequent winding 9 to 11 and finally reach the liquid outlet opening. The Figure 6 shows a development of the inner wall 5 of the roller cover 4, in which the arrangement of the adjusting elements 13, 14 between the turns 9 to 12 can be seen. The adjusting elements 13, 14 are preferably distributed at equidistant intervals in the circumferential direction of the roller cover 4, namely along the flow guide structure 6, which is formed by the windings 9 to 12.

The Figures 7 and 8 show the roller cover 4 with adjusting elements 13, 14 displaced into a separated position. The adjusting elements 13, 14 are displaced from the plane of the wall element arranged between adjacent turns 9 to 12, so that a flow path formed within a turn 9 to 12 is blocked off. In this separation position, the liquid which flows from right to left in a flow direction cannot, for example, pass from the turn 11 into the turn 10 next to it on the left or from the turn 10 into the turn 9 next to it on the left (at least not in relation to a complete Circulation in this turn 9, 10). Rather, the liquid is fed back into the winding 11 or 10, so that essentially an annular flow path results which does not cause the liquid to be conveyed in the axial direction of the roller cover 4. In this separated position, the individual liquid components each flow continuously in the same turn 9 to 12, so that in each case a specific axial partial area of the circumferential surface of the cleaning roller 3 is washed by the liquid. This results in intensive cleaning of the cleaning roller 3 in the axial direction during the duration of the separation position.

The roller cover 4 can also be flooded with liquid via inlet openings (not shown) so that at least the peripheral surface of the cleaning roller 3 currently located at the lowest point of the roller cover 4 in relation to a vertical direction is immersed in the liquid and when the cleaning roller 3 rotates like in a washing machine can be washed out. As soon as the adjusting elements 13,14 again from the in the Figures 7 and 8 disconnected position shown in the Figures 5 and 6th are shifted open position shown, the liquid can be transferred from one turn 10 to 12 in the next turn 9 to 11, so that there is a conveyance of the liquid along the flow guide structure 6 from right to left.

The Figures 9 and 10 show a second embodiment in which the flow guiding structure 6 has adjusting elements 15 to 18 arranged in pairs. The adjusting elements 15 to 18 are arranged in pairs on a rotating element 20, 21, namely the adjusting elements 15 and 16 on a first rotating element 20 and the adjusting elements 17 and 18 on a second rotating element 21. The rotating elements 20, 21 are simultaneously by means of a Not shown actuator displaceable, namely rotatable within the flow guide structure 6, the adjusting element 15 being shifted within the winding 9, the adjusting element 16 within the winding 10, the adjusting element 17 also within the winding 10 and the adjusting element 18 within the winding 11.

Figure 9 shows an open position of the separating elements 15 to 18, in which liquid can pass from the turn 11 directly into the turn 9. The turn 10 is skipped. As a result, the liquid can be guided more quickly in the axial direction of the roller cover 4, so that the roller cover 4 can be freed from liquid more quickly.

In contrast shows Figure 10 a separated position of the adjusting elements 15 to 18, in which a further transport of the liquid from the helix 11 into the helix 10 or from the helix 10 into the helix 9 is interrupted. This is achieved in that the helix 11 or the helix 10 are switched by the adjusting elements 15 to 18 in such a way that the flow paths branch back to themselves after each 360 degree revolution within the roller cover 4. In this embodiment, too, the dwell time of the liquid on the respective axial section of the cleaning roller 3 achieved by the separated position of the adjusting elements 15 to 18 can be used to wash the corresponding peripheral section intensively, in particular in connection with a column of liquid within the roller cover 4, through which the rotating cleaning roller 3 is moved.

As soon as the adjusting elements 15 to 18 again from the disconnected position according to Figure 10 in the open position according to Figure 9 are shifted, the liquid is conveyed further in the axial direction, which corresponds to a flow of the liquid in the representations from right to left.

The Figure 11 finally shows a further embodiment of the invention, in which the flow guide structure 6 is formed from a flexible material, here for example plastic. The flow guide structure 6 has successive turns 9 to 12, each of which has a width 19 parallel to an axial direction of the roller axis 2. At the turns 9 to 12 engage actuators, not shown, which can vary the width 19 of the turns 9 to 12 through the flexibility of the material. The actuators can preferably be displaced on the turns 9, 10 in one direction to the left in the illustration, so that the turns 9, 10 are stretched and the turns 11, retain their previous width. Due to the increased pitch of the windings 9, 10, the liquid in the area of the windings 9 and 10 is transported at an increased speed compared to the windings 11, 12. As a result, the effect of the liquid on the axially assigned partial area of the cleaning roller 3 can be achieved for a shorter time. <b> List of reference signs </b> 1 Damp cleaning device 26th Handle 2 Roller axis 3 Cleaning roller 4th Roller cover 5 Inner wall 6th Flow guide structure 7th Cover element 8th Opening range 9 Twist 10 Twist 11 Twist 12 Twist 13th Control element 14th Control element 15th Control element 16 Control element 17th Control element 18th Control element 19th width 20th Rotary element 21st Rotary element 22nd Base unit 23 Attachment 24 Filler neck 25th stalk

Claims (11)

1. Wet cleaning device (1) comprising a cleaning roller (3) rotatably mounted about a roller axis (2), and a roller cover (4) at least partially surrounding the cleaning roller (3) in the circumferential direction, characterised in that the roller cover (4), at least in a portion of an inner wall (5) of the roller cover (4), comprises a part of a flow guide structure (6) winding helically in the axial direction.
2. Wet cleaning device (1) according to claim 1, characterised in that the roller cover (4) comprises a movable cover element (7) for optionally closing and/or unblocking an opening region (8) of the roller cover (4), an inner wall (5) of the cover element (7) comprising a part of the flow guide structure (6).
3. Wet cleaning device (1) according to either claim 1 or claim 2, characterised in that at least a portion of a circumferential surface of the cleaning roller (3) has mechanical contact with the flow guide structure (6).
4. Wet cleaning device (1) according to any of the preceding claims, characterised in that the roller cover (4) comprises a liquid outlet opening at the end relative to an axial direction, which liquid outlet opening in particular is in flow connection with a liquid tank.
5. Wet cleaning device (1) according to any of the preceding claims, characterised in that a movable adjustment element (13, 14, 15, 16, 17, 18) is arranged at least between two turns (9, 10, 11, 12) of the flow guide structure (6), which adjustment element can be moved from an open position, which unblocks a turn (9, 10, 11, 12) for continuous flow into a subsequent turn (9, 10, 11, 12), into a disconnected position which prevents continuous flow, the adjustment element (13, 14, 15, 16, 17, 18) being in particular rotatable and/or pivotable.
6. Wet cleaning device (1) according to claim 5, characterised in that the adjustment element (13, 14, 15, 16, 17, 18) can be moved by means of an actuator, the flow guide structure (6) in particular comprising a plurality of adjustment elements (13, 14, 15, 16, 17, 18) which can be moved simultaneously by means of a common actuator.
7. Wet cleaning device (1) according to any of the preceding claims, characterised in that a width (19) of a turn (9, 10, 11, 12) of the flow guide structure (6) can be changed, the flow guide structure (6) in particular being made at least in part from a flexible material and/or the width (19) being adjustable by means of an actuator.
8. Apparatus for regenerating a cleaning roller (3) of a wet cleaning device (1), in particular a base station for receiving a portion of a wet cleaning device (1) that comprises a cleaning roller (3), the apparatus comprising a roller cover (4) for at least partially surrounding the cleaning roller (3) in the circumferential direction, characterised in that the roller cover (4), at least in a portion of an inner wall (5) of the roller cover (4), comprises a part of a flow guide structure (6) winding helically in the axial direction.
9. System consisting of an apparatus, in particular a base station, according to claim 8 and a wet cleaning device according to any of claims 1 to 7, characterised in that the roller covers (4) of the apparatus and of the wet cleaning device (1) correspond to one another in terms of their shape such that the cleaning roller (3) can be completely surrounded in the circumferential direction by the roller covers (4) and the parts of the flow guide structure (6) on both sides complement one another to form a continuous, helically winding overall structure.
10. Method for regenerating a cleaning roller (3) of a wet cleaning device (1), the cleaning roller (3), for a regeneration operation, being surrounded at least in the circumferential direction by a roller cover (4) and being rotated about a roller axis (2), liquid from the cleaning roller (3) being spun off onto an inner wall (5) of the roller cover (4), characterised in that the liquid on the inner wall (5) of the roller cover (4) flows along a flow guide structure (6) winding helically in the axial direction, in particular towards a liquid outlet opening in the roller cover (4).
11. Method according to claim 10, characterised in that the cleaning roller (3) is completely surrounded by the roller cover (4) and additionally liquid is introduced into the volume surrounded by the roller cover (4) until a circumferential portion of the cleaning roller (3) that is lowest relative to a vertical direction is immersed in the liquid, in particular at an immersion depth of approximately 1 mm to 10 mm.

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