Cleaning device with an adjustable squeegee assembly

Abstract

A cleaning device includes: a squeegee assembly for sucking up dirty water with which the surface has been cleaned, the squeegee assembly having: a squeegee housing; two suction strips arranged inside the squeegee housing; and an adjustment element for adjusting a height of the suction strips with respect to the squeegee housing, between: a no suction mode, wherein the cleaning tool is arranged on the surface while the suction strips are elevated above the surface, and a suction mode, wherein the cleaning tool is arranged on the surface for cleaning the surface while the two suction strips are arranged on the surface for removing at least one of water cleaning agent from the surface.

Description

BACKGROUND OF THE INVENTION

[0001] The present invention relates to a cleaning device with an adjustable squeegee assembly.

[0002] WO2024256706A1 for example discloses a squeegee assembly for collecting liquid from a floor, the squeegee assembly comprising a frame, at least one squeegee blade extending below a bottom side of the frame and formed of a flexible resilient material which, in use, is pressed against the floor by the frame and moved along the floor in a working direction for the collecting of the liquid from the floor. The device of WO2024256706A1 is characterised in that, a set of support rollers is provided connected to the frame and configured to, in use, support the squeegee assembly with respect to the floor, together with the squeegee blade pressing against the floor and at least one adjustment mechanism configured to determine a vertical offset of at least one respective support roller of the set of support rollers relative to the squeegee blade for controlling an amount of support provided by the set of support rollers relative to the squeegee blade, thereby controlling a variable amount of pressure applied by the flexible material of the squeegee blade pressing against the floor and / or lifting the squeegee blade at least partially off the floor.

[0003] The applicant has realized that the above-described solution is suboptimal in terms of cleaning efficiency, operation of the adjustment mechanism while using the cleaning device and user convenience.SUMMARY OF THE INVENTION

[0004] Accordingly, disclosed herein is a cleaning device for cleaning surfaces, the cleaning device comprising:

[0005] a spray element for spraying water and / or a cleaning agent onto the surface to be cleaned;

[0006] a recovery tank for collecting dirty water with which the surface has been cleaned;

[0007] a suction turbine for providing a suction flow for sucking up dirty water with which the surface has been cleaned;

[0008] a frame including a cleaning tool for cleaning the surface with water and / or cleaning agent,

[0009] a squeegee assembly for sucking up dirty water with which the surface has been cleaned, the squeegee assembly comprising:

[0010] a squeegee housing;

[0011] two suction strips arranged inside the squeegee housing; and

[0012] an adjustment element for adjusting a height of the suction strips with respect to the squeegee housing, between:

[0013] a) a no suction mode, wherein the cleaning tool is arranged on the surface while the suction strips are elevated above the surface, and

[0014] b) a suction mode, wherein the cleaning tool is arranged on the surface for cleaning the surface while the two suction strips are arranged on the surface for removing water and / or cleaning agent from the surface.

[0015] Compared to the prior art solution wherein a vertical offset is determined by at least one respective support roller relative to the squeegee, the solution of adjusting a height of the suction strips with respect to the squeegee housing, increases the cleaning efficiency. In FIG. 4B of prior art patent application WO2024256706A1 it can be seen that the cleaning tools of the cleaning device are partially lifted from the floor when the suction strips are elevated from the floor. Therefore, the cleaning tools are not fully in contact with the surface while scrubbing, covering a smaller area resulting in a lower cleaning efficiency than when the cleaning tools are fully in contact with the surface. According to the present disclosure the height of the suction strips is adjusted with respect to the squeegee housing. Because of this mechanism the cleaning tools of the cleaning device according to the present disclosure remain fully in contact with the surface regardless of whether the suction strips make contact with a surface or not. This results in a faster cleaning treatment, as by allowing the cleaning tools to remain fully in contact with the surface while scrubbing, the device can cover a larger area in a shorter amount of time. Therefore, the cleaning efficiency of the cleaning device disclosed herein is higher than the previously-known cleaning devices.

[0016] Furthermore, FIGS. 4A and 4B of prior art patent application WO2024256706A1 show that at least one support roller of the set of support rollers is associated with an adjustment element configured to determine a vertical offset relative to the squeegee blade has to be unfolded over an axis oriented along the movement direction to operate the adjustment. This implies that the cleaning device has to come to a full stop for the adjustment mechanism to be used. Therefore, the adjustment mechanism cannot be operated while the cleaning device is in use, limiting user convenience. An advantage of the cleaning device as disclosed herein, using an adjustment element for adjusting a height of the suction strips with respect to the squeegee housing, is that the adjustment element can be operated while the cleaning device is in use. Hence, the operation of the adjustment mechanism while using the cleaning device is introduced—enhancing the user convenience.

[0017] In certain aspects, a spray element is arranged for spraying water and / or a cleaning agent onto the surface to be cleaned. This helps to apply water or a cleaning solution to the surface, preparing it for cleaning.

[0018] In certain aspects, a recovery tank is arranged for collecting dirty water with which the surface has been cleaned. It is desirable to capture and store the dirty water, so that a user walking behind the cleaning device walks on a damp—but not: wet—floor. The wording “dirty water” as used herein refers to a condition compared to the water being sprayed on the surface before it is cleaned. As such, in practice “dirty water” refers to a mixture of water, cleaning agent, and any dirt removed from the cleaned surface—including oil, sand, dust, and other dirt. In accordance with the present disclosure, the recovery tank can be integrated onto the cleaning device, or it can be structurally separate from the cleaning device—e.g. being connected with the cleaning device via a hose.

[0019] In certain aspects, a suction turbine is arranged for providing a suction flow for sucking up the dirty water with which the surface has been cleaned. It is desirable that the cleaned surface is (as) dry (as reasonably possible) after it has been cleaned—to prevent people slipping or falling due to the surface being wet. As such, the cleaning device includes a suction turbine that sucks up the water that was sprayed on the surface by the spray element. The water is transported to the recovery tank by the flow initiated by the suction turbine.

[0020] In certain aspects, a frame including a cleaning tool is arranged for cleaning the surface with the water and / or cleaning agent to remove dirt and debris from the surface.

[0021] In certain aspects, a squeegee assembly is arranged for sucking up the dirty water with which the surface has been cleaned. This allows for the removal of the dirty water, leaving the surface clean and dry after the cleaning process. By collecting the dirty water, the squeegee assembly helps prevent the redistribution of dirt onto the surface,

[0022] In certain aspects the squeegee assembly comprises a squeegee housing. The squeegee housing serves to hold the suction strips, providing proper operation during cleaning. In contrast to the suction strips, which may be made of a resilient material, the housing may be made of a sturdy material, e.g. plastic, stainless steel, aluminium or another metal. During operation of the cleaning device, the position of the squeegee housing compared to the cleaning tool and its elevation above the surface to be cleaned may be fixed.

[0023] In certain aspects, a squeegee assembly comprises two suction strips arranged inside the squeegee housing. The two suction strips suck up the mixture of water and / or cleaning detergent that was sprayed on the surface to be cleaned by the spray element and any dirt that has come off the surface due to the treatment of the cleaning tools. In between the suction strips a relative vacuum is to be established by sealing the area of the cleaned surface in between the suction strips. For that reason, the suction strips are preferably of a flexible material ensuring proper contact with the cleaned surface over the entire length of the strips. During operation of the cleaning device, the position of the suction strips compared to the squeegee housing may be variable. In particular, the height of the suction strip compared to the lower side of the squeegee housing may be variable.

[0024] In certain aspects, a squeegee assembly comprises an adjustment element for adjusting a height of the suction strips with respect to the squeegee housing. This enables a transition between a no suction mode and a suction mode. The adjustment element can be operated while the cleaning device is in use, improving user convenience. As will be explained in more detail in the below, the adjustment element may be manually operated, or the adjustment element may be electronically operated.

[0025] In certain aspects, the adjustment element may set the squeegee assembly in a no suction mode, wherein the cleaning tool is arranged on the surface while the suction strips are elevated above the surface. In the no suction mode the suction strips of the squeegee assembly are elevated from the surface to prevent unnecessary wear by keeping the strips in constant contact with the surface. This extends the lifespan of the suction strips. Additionally, elevating the suction strips reduces drag, improving the maneuverability of the cleaning device during operation. In the no suction mode deep (spot) cleaning of the surface may be allowed by first scrubbing the floor for a first time with the cleaning device in the no suction mode, letting the cleaning solution act on the surface to be cleaned and in a later stage scrubbing the floor for a second time with the cleaning device in the suction mode, removing the water from the surface. Advantageously, when only the suction strips are moved upwards in the no suction mode compared to the entire squeegee assembly, the stability of the cleaning device is guaranteed in all operation modes.

[0026] In certain aspects, the adjustment element may set the squeegee assembly in a suction mode, wherein the cleaning tool is arranged on the surface for cleaning the surface while the two suction strips make contact with the surface for removing the water and / or cleaning agent from the surface. In the suction mode, the suction strips are in contact with the surface, allowing the cleaning device to effectively collect dirty water, cleaning solution, and debris. This helps dry the surface, prevent streaks, and reduce the risk of slipping. Proper suction also improves the cleaning process, provides that the device works efficiently and leaves the surface clean and safe.

[0027] In certain embodiments, the adjusting element acts on the suction strip(s) inside of the squeegee housing. The adjustment element adjusts the height of the suction strips in relation to the squeegee housing, providing that the cleaning tools stay in full contact with the surface regardless of whether the suction strips are in contact with the surface. This can result in relatively quick cleaning, as the cleaning tools can keep scrubbing effectively while covering a relatively large area in less time. The adjustment element also allows the height of the suction strips to be adjusted while the cleaning device is in use, eliminating the need to stop operation for manual adjustments. As a result this adjustment element improves user convenience. With the adjusting element acting on the suction strip(s) inside of the squeegee housing, the adjusting element is protected from any unintentional damages by incorrect handling / transportation of the cleaning device.

[0028] In certain embodiments, the adjustment element comprises a lever configured to be turned from a first lever position to a second lever position, wherein in the first lever position the cleaning device is in the no suction mode and wherein in the second lever position the cleaning device is in the suction mode. Compared to the adjusting element, which may be arranged inside the housing of the squeegee, the lever may be arranged outside of the squeegee housing. Advantageously, the lever is positioned at the side of the squeegee housing that is most convenient to reach for a user of the cleaning device—e.g. facing away from the cleaning tool and towards the user. This functionality allows the user to easily switch between the two modes, providing flexibility during operation. In the no suction mode, the cleaning device can focus on scrubbing the surface without removing liquids, while in the suction mode, the suction strips effectively remove water, cleaning solution, and debris.

[0029] In certain embodiments, the lever is rotated by more than 90 degrees in the suction mode compared to the no suction mode. In the suction mode, the lever may be rotated beyond a neutral position such that that the suction strips are automatically locked in place. This ensures that the suction strips stay securely in place during operation.

[0030] In certain embodiments, in the no suction mode the two suction strips are elevated above the surface by means of compression springs that push the two suction strips upwards against the gravity force. The compression springs provide a force to keep the suction strips lifted, preventing contact with the surface and allowing the operation of the cleaning device in the no suction mode.

[0031] In certain embodiments, in the suction mode the compression springs are compressed, altering the height of the two suction strips relative to the squeegee housing such that the two suction strips make contact with the surface. For example, the compression springs may be compressed by the aforementioned lever when the lever is rotated more than 90 degrees. The lever is turned towards the suction strips, causing them to be pushed down and compressing the compression springs. This compression lowers the suction strips and brings them into contact with the surface, allowing the cleaning device to effectively remove the dirty water. In alternative embodiments, described in the below, the suction strips may be lowered using an electrical solution instead of the here-described mechanical solution.

[0032] In certain embodiments, the squeegee assembly further comprises a retaining element arranged inside the squeegee housing, the retaining element configured to be coupled with the two suction strips and moveable in at least a vertical direction inside the squeegee housing along with the suction strips. The retaining element and the two suction strips are coupled and arranged inside the squeegee housing. The retaining element moves vertically, being pushed down by the lever or pushed upwards against the force of gravity by the compression springs. Starting from the no suction mode, when the adjustment element is activated it causes the retaining element and suction strips to move downward, bringing the suction strips into contact with the just-cleaned surface. Conversely, starting from the suction mode, de-activating the adjustment element may cause the compression springs to push the retaining element upwards when the suction strips are not needed.

[0033] In certain embodiments, the squeegee assembly further comprises a bottom element arranged inside the squeegee housing, the bottom element configured to be coupled to the squeegee housing, wherein in the suction mode the bottom element is configured to block horizontal displacement of the two suction strips relative to the squeegee housing. The bottom element may include a protrusion which is designed to fit into a hole in the retaining element as well as a hole in the backside of the suction strips. In the suction mode the protrusion is inserted into these holes, it provides that the suction strips are securely held in place. As a result, the suction strips cannot move horizontally relative to the squeegee housing, preventing any unwanted displacement during operation.

[0034] In certain embodiments, the squeegee assembly further comprises a bottom element arranged inside the squeegee housing, the bottom element configured to be coupled to the squeegee housing, wherein in the no suction mode the bottom element is configured to make horizontal displacement of the suction strips relative to the squeegee housing possible. In the no suction mode, the protrusion may be removed from the holes in both the retaining element and the suction strips, effectively relieving the blockage. This allows the suction strips to move horizontally relative to the squeegee housing, providing adjustment and repositioning. As a result, the suction strips can be freely adjusted as needed.

[0035] In certain embodiments, in the no suction mode the two suction strips can be decoupled from the retaining element such that the two suction strips can be replaced by new suction strips. This feature provides a simple and efficient way to replace the suction strips when worn out or damaged. This decoupling mechanism improves the convenience of maintenance of the suction strips and ensures that the cleaning device remains effective over time by allowing the user to quickly swap out worn-out suction strips for new ones-guaranteeing optimal performance.

[0036] In certain embodiments, a sweepbox for collecting waste is coupled to the squeegee housing, at a position in between the cleaning tool and the suction strips. This placement allows the sweepbox to capture and contain relatively big parts debris and dirt loosened by the cleaning tool during operation before it is removed by the suction strips. By positioning the sweepbox in this location, the system prevents the debris and dirt from being redistributed across the surface. This arrangement also minimizes possible damage to the suction strips by the debris and dirt.

[0037] In certain embodiments, the cleaning device comprises a squeegee connection element for coupling the squeegee assembly to the frame. This connection ensures that the squeegee assembly stays securely in place during operation.

[0038] In certain embodiments, the adjustment element comprises an electrical actuator such as a servo motor and / or an electromagnet, wherein in use of the electrical actuator, the cleaning device can be switched from the no suction mode to the suction mode and vice versa. By using an electrical actuator, there is no longer a need to bend down and manually switch the cleaning device between suction mode and no suction mode. The actuator can be controlled by a button or switch that is preferably positioned within hand reach of a user of the cleaning device, allowing the user to operate it conveniently while using the cleaning device. This electrical control eliminates the need to stop the machine to effect the switch between the two described suction modes, improving ease of use.

[0039] In certain embodiments, the electrical actuator obtains electrical power via the squeegee connection element. The connection element includes two steel pins that serve as electrical contacts through which a current flows, with one pin acting as the positive (+ / +) connection and the other as the negative (− / −) connection. These pins are integrated into an electronics housing of the cleaning device, where they are directly connected to a main PCB and a battery system. This design provides a power supply to the electrical actuator in charge of activating the squeegee adjustment element. Additionally, since the pins may also function as ball joints, the squeegee assembly can tilt relative to the machine while maintaining a secure electrical connection.

[0040] In certain embodiments, the squeegee assembly is fully integrated in the frame. This integration provides a compact design, reducing the overall size and weight of the cleaning device. By incorporating the squeegee assembly directly into the frame, the device has enhanced manoeuvrability and is therefore easier to use. Furthermore, this design can simplify the assembly of the cleaning device, as fewer separate components need to be mounted to each other.

[0041] In certain embodiments, the cleaning device comprises a controller, in communication with the suction turbine and the squeegee assembly, the controller configured to control the activation of the suction turbine such that in the suction mode the suction turbine is activated, and in the no suction mode is inactive. This allows for efficient management of energy use, as the suction turbine operates only when needed. The controller provides transitions between modes, optimizing the cleaning process by activating the suction turbine in the suction mode, while conserving power and reducing unnecessary wear on the cleaning device in the no suction mode.

[0042] In certain embodiments, the squeegee assembly comprises one or more electrically powered squeegee castors configured to propel the cleaning device to compensate or to overcompensate a friction between the two suction strips and the surface. This electrically powered castor improves convenience of use of the cleaning device, reducing the physical effort required to push or pull the device across the surface reducing strain on the user. In case the squeegee assembly comprises one or more electrically powered squeegee castors, it is particularly advantageous when the tool(s) are arranged substantially parallel to the surface to be cleaned. There is no need for the tool(s) to generate a propulsion force, as this is already generated by the castor wheels. Arranging the tool(s) parallel to the surface to be cleaned makes construction of the cleaning device simpler compared to machines which have propulsion via two substantially horizontal rotating tools. In embodiments, the castor wheels may be powered only when the squeegee assembly is in the suction mode, the castor wheels being inactive when the squeegee assembly is in the no suction mode and contact between the suction strips and the surface is absent so that no friction force results from this contact. In embodiments wherein the castor wheels of the squeegee assembly are electrically powered, optionally the driving force per wheel is variable, so that e.g. when the user wants to effect a turn with the cleaning device, e.g. by manipulating the top part to the left or to the right, a controller may variably drive the castor wheels to reduce the turn radius of the cleaning device.

[0043] In certain embodiments, the tool is rotatable about a tool rotation axis. In other embodiments, the tool may vibrate in a certain pattern, so that an excentric type cleaning device is obtained. When the tool is rotatable about a tool rotation axis, said axis may be arranged substantially normal to the surface to be cleaned or said tool rotation axis may be arranged substantially perpendicular to the surface to be cleaned. When the tool rotation axis is arranged normal to the surface to be cleaned, no net propulsion force can be generated by the tool(s). In other embodiments, the rotation axis may be inclined with respect to the surface to be cleaned. In such embodiments, when there are two tools which counter-rotate a net propulsion force is generated by the tools. In accordance with the present disclosure, there may be a single cleaning tool, there may be a pair of cleaning tools or there may be three or more cleaning tools.BRIEF DESCRIPTION OF THE FIGURES

[0044] These and other elements of the present disclosure will now be elucidated further with reference to the attached figures. In these figures, same and like elements are denominated with the same reference numerals, wherein:

[0045] FIG. 1 shows an isometric view of a non-limiting embodiment of a cleaning device according to the present disclosure;

[0046] FIG. 2 shows a back view of a squeegee assembly according to the present disclosure in suction mode;

[0047] FIG. 3 shows an isometric view of a squeegee assembly according to the present disclosure in suction mode;

[0048] FIG. 4 shows a back view of a squeegee assembly according to the present disclosure in no suction mode;

[0049] FIG. 5 shows an isometric view of a squeegee assembly according to the present disclosure in no suction mode;

[0050] FIG. 6 shows an exploded view of a squeegee assembly according to the present disclosure; and

[0051] FIG. 7 shows an isometric view of a sweepbox according to the present disclosure.DETAILED DESCRIPTION

[0052] The present disclosure will now be described more fully hereinafter with reference to the accompanying drawings in which exemplary embodiments of the invention are shown. However, the disclosure may be embodied in many different forms and should not be construed as limited to the representative embodiments set forth herein. The exemplary embodiments are provided so that this disclosure will be both thorough and complete, and will fully convey the scope of the invention and enable one of ordinary skill in the art to make, use and practice the invention.

[0053] FIG. 1 shows a cleaning device 1 for cleaning surfaces S in particular floors, of all kinds of make and construction; including but not limited to concrete, tiles, PVC, marble, etc. The cleaning device 1 is shown in isometric view in FIG. 1. The cleaning device 1 shown here is known as a scrubber-drier, and will be referred to as such in the remainder of this description. The scrubber-drier 1 comprises a handle 23 with which a user can hold and steer the scrubber-drier 1. The handle 23 is an element of the top part 25. Attached to the top part 25 are a clean water tank 24 and a recovery tank 12, respectively for storing clean water with which the surface S may be cleaned and for storing dirty water with which the surface S has been cleaned. The top part 25 is connected to a frame 14, the frame 14 includes a spray element 11 in fluid communication with the clean water tank 24. The spray element 11 takes water from the clean water tank 24 and sprays it on the surface S to be cleaned, so that tools 15 may scrub the surface S. Optionally, a cleaning detergent is added to the water in some stage. As the scrubber-drier 1 moves in the working direction generally indicated by arrow W, after water is sprayed on the surface S the surface S will be scrubbed by tools 15. After the surface S has been scrubbed, a squeegee assembly 16 comprising a squeegee housing 17 and suction strips 18, arranged behind the tools 15 and in fluid communication with the recovery tank 12, sucks up the (now) dirty water. This dirty water contains a mixture of the clean water and any dirt scrubbed off of the surface S. The squeegee assembly 16 will be described in more detail with reference to FIGS. 2-4.

[0054] The scrubber-drier 1 shown in FIG. 1 is one exemplary embodiment of a cleaning device as disclosed herein. The embodiment shown in FIG. 1 comprises two tools 15. Although this is of course possible, this is not required. For the purpose of the present invention, a single tool 15 would suffice. Likewise, the inclusion of a handle 23, a top part 25 and the like are all optional.

[0055] FIGS. 2 and 3 show a back and an isometric view, respectively, of a no suction mode 16a of the squeegee assembly 16. In the no suction mode 16a, the suction strips 18 of the squeegee assembly 16 are elevated above the surface S, as indicated by the suction strips 18 not sticking out below castors 25 in FIG. 2a. Three castors 25 are coupled to the squeegee housing 17 and facilitate movement of the squeegee assembly 16, e.g. in a working direction W or in a reverse direction. Additionally, a hose connector 26 is coupled to the squeegee housing 17 to allow a hose to be connected for supplying water and / or a cleaning agent onto the surface S to be cleaned. Furthermore, the squeegee assembly 16 comprises two suction strips 18 arranged in the squeegee housing 17 to establish a relative vacuum in between the suction strips 18. The squeegee assembly 16 comprises an adjustment element 19 for adjusting the height H of the suction strips 18 with respect to the squeegee housing 17. The adjustment element 19 includes a lever located outside of the squeegee housing 17 that is here arranged in a first lever position 19a. With the lever in this first lever position 19a, the scrubber-drier 1 operates in the no suction mode 16a.

[0056] In FIGS. 4 and 5 a back and an isometric view, respectively, of the suction mode 16b of the squeegee assembly 16 is shown. In the suction mode 16b, the suction strips 18 are arranged on the surface S for removing water and / or cleaning agent from the surface S, as indicated by the suction strips 18 sticking out below the castors 25 in FIG. 4. The same elements from FIGS. 2 and 3 are shown, with the difference being that the adjustment element 19 includes a lever located outside of the squeegee housing 17 that is turned to a second lever position 19a. In this second lever position 19a, the scrubber-drier 1 operates in the suction mode 16b.

[0057] In addition, FIG. 6 shows an exploded view of the squeegee assembly 16. The squeegee assembly 16 comprises a retaining element 21 arranged inside the squeegee housing 17, which is configured to be coupled with the two suction strips 18 and is moveable in at least a vertical direction inside the squeegee housing 17. In the no suction mode 16a, the two suction strips 18 can be decoupled from the retaining element 21, allowing worn-out or damaged suction strips to be replaced by new suction strips. This is possible because the backside of the suction strips 18 features rubber protrusions 18a that fit into recesses of the retaining element 21, allowing the protrusion to be manually coupled and decoupled into the recess. In the no suction mode 16a, the two suction strips 18 are elevated above the surface S by means of compression springs 20 that push the retaining element 21, and, associated therewith, the two suction strips 18, upwards against the gravity force Fg. The squeegee assembly 16 also includes a bottom element 22 arranged inside the squeegee housing 17, which is configured to be coupled to the squeegee housing 17. In the suction mode 16b, the bottom element 22 is configured to block horizontal displacement of the two suction strips 18 relative to the squeegee housing 17. This is because in the suction mode, a protrusion of the bottom element 22a fits into a cut-out part 18b of the rubber protrusions 18a and a cut-out part 21a of the retaining element 21, thereby blocking the horizontal displacement of the two suction strips 18. In contrast, in the no suction mode 16a, the bottom element 22 is configured to allow horizontal displacement of the suction strips 18 relative to the squeegee housing 17, enabling their movement when needed. In more detail, the protrusion of the bottom element 22a is not fitted into the cut-out parts 18b of the rubber protrusion 18a and 21a of the retaining element 21, allowing horizontal displacement of the two suction strips 18.

[0058] In a non-shown embodiment, the adjustment element alternatively comprises an electrical actuator (not shown), such as a servo motor and / or an electromagnet, which allows the scrubber-drier 1 to switch between the no suction mode 16a and the suction mode 16b. The electrical actuator receives electrical power via the squeegee connection element (not shown).

[0059] In another non-shown embodiment, the squeegee assembly 16 can also be integrated into the frame 12 (not shown).

[0060] Additionally, in another non-shown embodiment, the squeegee assembly 16 comprises an electrically powered squeegee castor (not shown), which is configured to propel the scrubber-drier 1 to compensate for or overcompensate for the friction between the two suction strips 18 and the surface S.

[0061] Further shown in FIG. 7 is a sweepbox 22. The sweepbox 22 may be placed in between the cleaning tool(s) and the squeegee assembly and may collect relatively big parts of debris and dirt. For example, the sweepbox 22 may be coupled to the squeegee housing 17as shown in FIG. 1. More specifically, the sweepbox can be coupled in between the hose connector 26 and a hose (not shown). By collecting relatively large parts of debris and dirt, in the sweepbox 22, the suction strips of the squeegee assembly do not come in contact with such relatively large parts of debris and dirt and are protected so that their lifespan may be increased. To that effect, the sweepbox has a grating structure at its bottom. Any particles larger than the grating structure remain inside of the sweepbox 22, whereas any particles smaller than the grating structure (including fluids) will pass through the sweepbox towards the squeegee. By amending the size of the gratings, the amount of rigid particles captured in the sweepbox compared to the amount of rigid particles coming into contact with the suction strips of the squeegee assembly may be optimized.

Examples

Embodiment Construction

[0052]The present disclosure will now be described more fully hereinafter with reference to the accompanying drawings in which exemplary embodiments of the invention are shown. However, the disclosure may be embodied in many different forms and should not be construed as limited to the representative embodiments set forth herein. The exemplary embodiments are provided so that this disclosure will be both thorough and complete, and will fully convey the scope of the invention and enable one of ordinary skill in the art to make, use and practice the invention.

[0053]FIG. 1 shows a cleaning device 1 for cleaning surfaces S in particular floors, of all kinds of make and construction; including but not limited to concrete, tiles, PVC, marble, etc. The cleaning device 1 is shown in isometric view in FIG. 1. The cleaning device 1 shown here is known as a scrubber-drier, and will be referred to as such in the remainder of this description. The scrubber-drier 1 comprises a handle 23 with whic...

BACKGROUND OF THE INVENTION

[0001] The present invention relates to a cleaning device with an adjustable squeegee assembly.

[0002] WO2024256706A1 for example discloses a squeegee assembly for collecting liquid from a floor, the squeegee assembly comprising a frame, at least one squeegee blade extending below a bottom side of the frame and formed of a flexible resilient material which, in use, is pressed against the floor by the frame and moved along the floor in a working direction for the collecting of the liquid from the floor. The device of WO2024256706A1 is characterised in that, a set of support rollers is provided connected to the frame and configured to, in use, support the squeegee assembly with respect to the floor, together with the squeegee blade pressing against the floor and at least one adjustment mechanism configured to determine a vertical offset of at least one respective support roller of the set of support rollers relative to the squeegee blade for controlling an amount of support provided by the set of support rollers relative to the squeegee blade, thereby controlling a variable amount of pressure applied by the flexible material of the squeegee blade pressing against the floor and / or lifting the squeegee blade at least partially off the floor.

[0003] The applicant has realized that the above-described solution is suboptimal in terms of cleaning efficiency, operation of the adjustment mechanism while using the cleaning device and user convenience.SUMMARY OF THE INVENTION

[0004] Accordingly, disclosed herein is a cleaning device for cleaning surfaces, the cleaning device comprising:

[0005] a spray element for spraying water and / or a cleaning agent onto the surface to be cleaned;

[0006] a recovery tank for collecting dirty water with which the surface has been cleaned;

[0007] a suction turbine for providing a suction flow for sucking up dirty water with which the surface has been cleaned;

[0008] a frame including a cleaning tool for cleaning the surface with water and / or cleaning agent,

[0009] a squeegee assembly for sucking up dirty water with which the surface has been cleaned, the squeegee assembly comprising:

[0010] a squeegee housing;

[0011] two suction strips arranged inside the squeegee housing; and

[0012] an adjustment element for adjusting a height of the suction strips with respect to the squeegee housing, between:

[0013] a) a no suction mode, wherein the cleaning tool is arranged on the surface while the suction strips are elevated above the surface, and

[0014] b) a suction mode, wherein the cleaning tool is arranged on the surface for cleaning the surface while the two suction strips are arranged on the surface for removing water and / or cleaning agent from the surface.

[0015] Compared to the prior art solution wherein a vertical offset is determined by at least one respective support roller relative to the squeegee, the solution of adjusting a height of the suction strips with respect to the squeegee housing, increases the cleaning efficiency. In FIG. 4B of prior art patent application WO2024256706A1 it can be seen that the cleaning tools of the cleaning device are partially lifted from the floor when the suction strips are elevated from the floor. Therefore, the cleaning tools are not fully in contact with the surface while scrubbing, covering a smaller area resulting in a lower cleaning efficiency than when the cleaning tools are fully in contact with the surface. According to the present disclosure the height of the suction strips is adjusted with respect to the squeegee housing. Because of this mechanism the cleaning tools of the cleaning device according to the present disclosure remain fully in contact with the surface regardless of whether the suction strips make contact with a surface or not. This results in a faster cleaning treatment, as by allowing the cleaning tools to remain fully in contact with the surface while scrubbing, the device can cover a larger area in a shorter amount of time. Therefore, the cleaning efficiency of the cleaning device disclosed herein is higher than the previously-known cleaning devices.

[0016] Furthermore, FIGS. 4A and 4B of prior art patent application WO2024256706A1 show that at least one support roller of the set of support rollers is associated with an adjustment element configured to determine a vertical offset relative to the squeegee blade has to be unfolded over an axis oriented along the movement direction to operate the adjustment. This implies that the cleaning device has to come to a full stop for the adjustment mechanism to be used. Therefore, the adjustment mechanism cannot be operated while the cleaning device is in use, limiting user convenience. An advantage of the cleaning device as disclosed herein, using an adjustment element for adjusting a height of the suction strips with respect to the squeegee housing, is that the adjustment element can be operated while the cleaning device is in use. Hence, the operation of the adjustment mechanism while using the cleaning device is introduced—enhancing the user convenience.

[0017] In certain aspects, a spray element is arranged for spraying water and / or a cleaning agent onto the surface to be cleaned. This helps to apply water or a cleaning solution to the surface, preparing it for cleaning.

[0018] In certain aspects, a recovery tank is arranged for collecting dirty water with which the surface has been cleaned. It is desirable to capture and store the dirty water, so that a user walking behind the cleaning device walks on a damp—but not: wet—floor. The wording “dirty water” as used herein refers to a condition compared to the water being sprayed on the surface before it is cleaned. As such, in practice “dirty water” refers to a mixture of water, cleaning agent, and any dirt removed from the cleaned surface—including oil, sand, dust, and other dirt. In accordance with the present disclosure, the recovery tank can be integrated onto the cleaning device, or it can be structurally separate from the cleaning device—e.g. being connected with the cleaning device via a hose.

[0019] In certain aspects, a suction turbine is arranged for providing a suction flow for sucking up the dirty water with which the surface has been cleaned. It is desirable that the cleaned surface is (as) dry (as reasonably possible) after it has been cleaned—to prevent people slipping or falling due to the surface being wet. As such, the cleaning device includes a suction turbine that sucks up the water that was sprayed on the surface by the spray element. The water is transported to the recovery tank by the flow initiated by the suction turbine.

[0020] In certain aspects, a frame including a cleaning tool is arranged for cleaning the surface with the water and / or cleaning agent to remove dirt and debris from the surface.

[0021] In certain aspects, a squeegee assembly is arranged for sucking up the dirty water with which the surface has been cleaned. This allows for the removal of the dirty water, leaving the surface clean and dry after the cleaning process. By collecting the dirty water, the squeegee assembly helps prevent the redistribution of dirt onto the surface,

[0022] In certain aspects the squeegee assembly comprises a squeegee housing. The squeegee housing serves to hold the suction strips, providing proper operation during cleaning. In contrast to the suction strips, which may be made of a resilient material, the housing may be made of a sturdy material, e.g. plastic, stainless steel, aluminium or another metal. During operation of the cleaning device, the position of the squeegee housing compared to the cleaning tool and its elevation above the surface to be cleaned may be fixed.

[0023] In certain aspects, a squeegee assembly comprises two suction strips arranged inside the squeegee housing. The two suction strips suck up the mixture of water and / or cleaning detergent that was sprayed on the surface to be cleaned by the spray element and any dirt that has come off the surface due to the treatment of the cleaning tools. In between the suction strips a relative vacuum is to be established by sealing the area of the cleaned surface in between the suction strips. For that reason, the suction strips are preferably of a flexible material ensuring proper contact with the cleaned surface over the entire length of the strips. During operation of the cleaning device, the position of the suction strips compared to the squeegee housing may be variable. In particular, the height of the suction strip compared to the lower side of the squeegee housing may be variable.

[0024] In certain aspects, a squeegee assembly comprises an adjustment element for adjusting a height of the suction strips with respect to the squeegee housing. This enables a transition between a no suction mode and a suction mode. The adjustment element can be operated while the cleaning device is in use, improving user convenience. As will be explained in more detail in the below, the adjustment element may be manually operated, or the adjustment element may be electronically operated.

[0025] In certain aspects, the adjustment element may set the squeegee assembly in a no suction mode, wherein the cleaning tool is arranged on the surface while the suction strips are elevated above the surface. In the no suction mode the suction strips of the squeegee assembly are elevated from the surface to prevent unnecessary wear by keeping the strips in constant contact with the surface. This extends the lifespan of the suction strips. Additionally, elevating the suction strips reduces drag, improving the maneuverability of the cleaning device during operation. In the no suction mode deep (spot) cleaning of the surface may be allowed by first scrubbing the floor for a first time with the cleaning device in the no suction mode, letting the cleaning solution act on the surface to be cleaned and in a later stage scrubbing the floor for a second time with the cleaning device in the suction mode, removing the water from the surface. Advantageously, when only the suction strips are moved upwards in the no suction mode compared to the entire squeegee assembly, the stability of the cleaning device is guaranteed in all operation modes.

[0026] In certain aspects, the adjustment element may set the squeegee assembly in a suction mode, wherein the cleaning tool is arranged on the surface for cleaning the surface while the two suction strips make contact with the surface for removing the water and / or cleaning agent from the surface. In the suction mode, the suction strips are in contact with the surface, allowing the cleaning device to effectively collect dirty water, cleaning solution, and debris. This helps dry the surface, prevent streaks, and reduce the risk of slipping. Proper suction also improves the cleaning process, provides that the device works efficiently and leaves the surface clean and safe.

[0027] In certain embodiments, the adjusting element acts on the suction strip(s) inside of the squeegee housing. The adjustment element adjusts the height of the suction strips in relation to the squeegee housing, providing that the cleaning tools stay in full contact with the surface regardless of whether the suction strips are in contact with the surface. This can result in relatively quick cleaning, as the cleaning tools can keep scrubbing effectively while covering a relatively large area in less time. The adjustment element also allows the height of the suction strips to be adjusted while the cleaning device is in use, eliminating the need to stop operation for manual adjustments. As a result this adjustment element improves user convenience. With the adjusting element acting on the suction strip(s) inside of the squeegee housing, the adjusting element is protected from any unintentional damages by incorrect handling / transportation of the cleaning device.

[0028] In certain embodiments, the adjustment element comprises a lever configured to be turned from a first lever position to a second lever position, wherein in the first lever position the cleaning device is in the no suction mode and wherein in the second lever position the cleaning device is in the suction mode. Compared to the adjusting element, which may be arranged inside the housing of the squeegee, the lever may be arranged outside of the squeegee housing. Advantageously, the lever is positioned at the side of the squeegee housing that is most convenient to reach for a user of the cleaning device—e.g. facing away from the cleaning tool and towards the user. This functionality allows the user to easily switch between the two modes, providing flexibility during operation. In the no suction mode, the cleaning device can focus on scrubbing the surface without removing liquids, while in the suction mode, the suction strips effectively remove water, cleaning solution, and debris.

[0029] In certain embodiments, the lever is rotated by more than 90 degrees in the suction mode compared to the no suction mode. In the suction mode, the lever may be rotated beyond a neutral position such that that the suction strips are automatically locked in place. This ensures that the suction strips stay securely in place during operation.

[0030] In certain embodiments, in the no suction mode the two suction strips are elevated above the surface by means of compression springs that push the two suction strips upwards against the gravity force. The compression springs provide a force to keep the suction strips lifted, preventing contact with the surface and allowing the operation of the cleaning device in the no suction mode.

[0031] In certain embodiments, in the suction mode the compression springs are compressed, altering the height of the two suction strips relative to the squeegee housing such that the two suction strips make contact with the surface. For example, the compression springs may be compressed by the aforementioned lever when the lever is rotated more than 90 degrees. The lever is turned towards the suction strips, causing them to be pushed down and compressing the compression springs. This compression lowers the suction strips and brings them into contact with the surface, allowing the cleaning device to effectively remove the dirty water. In alternative embodiments, described in the below, the suction strips may be lowered using an electrical solution instead of the here-described mechanical solution.

[0032] In certain embodiments, the squeegee assembly further comprises a retaining element arranged inside the squeegee housing, the retaining element configured to be coupled with the two suction strips and moveable in at least a vertical direction inside the squeegee housing along with the suction strips. The retaining element and the two suction strips are coupled and arranged inside the squeegee housing. The retaining element moves vertically, being pushed down by the lever or pushed upwards against the force of gravity by the compression springs. Starting from the no suction mode, when the adjustment element is activated it causes the retaining element and suction strips to move downward, bringing the suction strips into contact with the just-cleaned surface. Conversely, starting from the suction mode, de-activating the adjustment element may cause the compression springs to push the retaining element upwards when the suction strips are not needed.

[0033] In certain embodiments, the squeegee assembly further comprises a bottom element arranged inside the squeegee housing, the bottom element configured to be coupled to the squeegee housing, wherein in the suction mode the bottom element is configured to block horizontal displacement of the two suction strips relative to the squeegee housing. The bottom element may include a protrusion which is designed to fit into a hole in the retaining element as well as a hole in the backside of the suction strips. In the suction mode the protrusion is inserted into these holes, it provides that the suction strips are securely held in place. As a result, the suction strips cannot move horizontally relative to the squeegee housing, preventing any unwanted displacement during operation.

[0034] In certain embodiments, the squeegee assembly further comprises a bottom element arranged inside the squeegee housing, the bottom element configured to be coupled to the squeegee housing, wherein in the no suction mode the bottom element is configured to make horizontal displacement of the suction strips relative to the squeegee housing possible. In the no suction mode, the protrusion may be removed from the holes in both the retaining element and the suction strips, effectively relieving the blockage. This allows the suction strips to move horizontally relative to the squeegee housing, providing adjustment and repositioning. As a result, the suction strips can be freely adjusted as needed.

[0035] In certain embodiments, in the no suction mode the two suction strips can be decoupled from the retaining element such that the two suction strips can be replaced by new suction strips. This feature provides a simple and efficient way to replace the suction strips when worn out or damaged. This decoupling mechanism improves the convenience of maintenance of the suction strips and ensures that the cleaning device remains effective over time by allowing the user to quickly swap out worn-out suction strips for new ones-guaranteeing optimal performance.

[0036] In certain embodiments, a sweepbox for collecting waste is coupled to the squeegee housing, at a position in between the cleaning tool and the suction strips. This placement allows the sweepbox to capture and contain relatively big parts debris and dirt loosened by the cleaning tool during operation before it is removed by the suction strips. By positioning the sweepbox in this location, the system prevents the debris and dirt from being redistributed across the surface. This arrangement also minimizes possible damage to the suction strips by the debris and dirt.

[0037] In certain embodiments, the cleaning device comprises a squeegee connection element for coupling the squeegee assembly to the frame. This connection ensures that the squeegee assembly stays securely in place during operation.

[0038] In certain embodiments, the adjustment element comprises an electrical actuator such as a servo motor and / or an electromagnet, wherein in use of the electrical actuator, the cleaning device can be switched from the no suction mode to the suction mode and vice versa. By using an electrical actuator, there is no longer a need to bend down and manually switch the cleaning device between suction mode and no suction mode. The actuator can be controlled by a button or switch that is preferably positioned within hand reach of a user of the cleaning device, allowing the user to operate it conveniently while using the cleaning device. This electrical control eliminates the need to stop the machine to effect the switch between the two described suction modes, improving ease of use.

[0039] In certain embodiments, the electrical actuator obtains electrical power via the squeegee connection element. The connection element includes two steel pins that serve as electrical contacts through which a current flows, with one pin acting as the positive (+ / +) connection and the other as the negative (− / −) connection. These pins are integrated into an electronics housing of the cleaning device, where they are directly connected to a main PCB and a battery system. This design provides a power supply to the electrical actuator in charge of activating the squeegee adjustment element. Additionally, since the pins may also function as ball joints, the squeegee assembly can tilt relative to the machine while maintaining a secure electrical connection.

[0040] In certain embodiments, the squeegee assembly is fully integrated in the frame. This integration provides a compact design, reducing the overall size and weight of the cleaning device. By incorporating the squeegee assembly directly into the frame, the device has enhanced manoeuvrability and is therefore easier to use. Furthermore, this design can simplify the assembly of the cleaning device, as fewer separate components need to be mounted to each other.

[0041] In certain embodiments, the cleaning device comprises a controller, in communication with the suction turbine and the squeegee assembly, the controller configured to control the activation of the suction turbine such that in the suction mode the suction turbine is activated, and in the no suction mode is inactive. This allows for efficient management of energy use, as the suction turbine operates only when needed. The controller provides transitions between modes, optimizing the cleaning process by activating the suction turbine in the suction mode, while conserving power and reducing unnecessary wear on the cleaning device in the no suction mode.

[0042] In certain embodiments, the squeegee assembly comprises one or more electrically powered squeegee castors configured to propel the cleaning device to compensate or to overcompensate a friction between the two suction strips and the surface. This electrically powered castor improves convenience of use of the cleaning device, reducing the physical effort required to push or pull the device across the surface reducing strain on the user. In case the squeegee assembly comprises one or more electrically powered squeegee castors, it is particularly advantageous when the tool(s) are arranged substantially parallel to the surface to be cleaned. There is no need for the tool(s) to generate a propulsion force, as this is already generated by the castor wheels. Arranging the tool(s) parallel to the surface to be cleaned makes construction of the cleaning device simpler compared to machines which have propulsion via two substantially horizontal rotating tools. In embodiments, the castor wheels may be powered only when the squeegee assembly is in the suction mode, the castor wheels being inactive when the squeegee assembly is in the no suction mode and contact between the suction strips and the surface is absent so that no friction force results from this contact. In embodiments wherein the castor wheels of the squeegee assembly are electrically powered, optionally the driving force per wheel is variable, so that e.g. when the user wants to effect a turn with the cleaning device, e.g. by manipulating the top part to the left or to the right, a controller may variably drive the castor wheels to reduce the turn radius of the cleaning device.

[0043] In certain embodiments, the tool is rotatable about a tool rotation axis. In other embodiments, the tool may vibrate in a certain pattern, so that an excentric type cleaning device is obtained. When the tool is rotatable about a tool rotation axis, said axis may be arranged substantially normal to the surface to be cleaned or said tool rotation axis may be arranged substantially perpendicular to the surface to be cleaned. When the tool rotation axis is arranged normal to the surface to be cleaned, no net propulsion force can be generated by the tool(s). In other embodiments, the rotation axis may be inclined with respect to the surface to be cleaned. In such embodiments, when there are two tools which counter-rotate a net propulsion force is generated by the tools. In accordance with the present disclosure, there may be a single cleaning tool, there may be a pair of cleaning tools or there may be three or more cleaning tools.BRIEF DESCRIPTION OF THE FIGURES

[0044] These and other elements of the present disclosure will now be elucidated further with reference to the attached figures. In these figures, same and like elements are denominated with the same reference numerals, wherein:

[0045] FIG. 1 shows an isometric view of a non-limiting embodiment of a cleaning device according to the present disclosure;

[0046] FIG. 2 shows a back view of a squeegee assembly according to the present disclosure in suction mode;

[0047] FIG. 3 shows an isometric view of a squeegee assembly according to the present disclosure in suction mode;

[0048] FIG. 4 shows a back view of a squeegee assembly according to the present disclosure in no suction mode;

[0049] FIG. 5 shows an isometric view of a squeegee assembly according to the present disclosure in no suction mode;

[0050] FIG. 6 shows an exploded view of a squeegee assembly according to the present disclosure; and

[0051] FIG. 7 shows an isometric view of a sweepbox according to the present disclosure.DETAILED DESCRIPTION

[0052] The present disclosure will now be described more fully hereinafter with reference to the accompanying drawings in which exemplary embodiments of the invention are shown. However, the disclosure may be embodied in many different forms and should not be construed as limited to the representative embodiments set forth herein. The exemplary embodiments are provided so that this disclosure will be both thorough and complete, and will fully convey the scope of the invention and enable one of ordinary skill in the art to make, use and practice the invention.

[0053] FIG. 1 shows a cleaning device 1 for cleaning surfaces S in particular floors, of all kinds of make and construction; including but not limited to concrete, tiles, PVC, marble, etc. The cleaning device 1 is shown in isometric view in FIG. 1. The cleaning device 1 shown here is known as a scrubber-drier, and will be referred to as such in the remainder of this description. The scrubber-drier 1 comprises a handle 23 with which a user can hold and steer the scrubber-drier 1. The handle 23 is an element of the top part 25. Attached to the top part 25 are a clean water tank 24 and a recovery tank 12, respectively for storing clean water with which the surface S may be cleaned and for storing dirty water with which the surface S has been cleaned. The top part 25 is connected to a frame 14, the frame 14 includes a spray element 11 in fluid communication with the clean water tank 24. The spray element 11 takes water from the clean water tank 24 and sprays it on the surface S to be cleaned, so that tools 15 may scrub the surface S. Optionally, a cleaning detergent is added to the water in some stage. As the scrubber-drier 1 moves in the working direction generally indicated by arrow W, after water is sprayed on the surface S the surface S will be scrubbed by tools 15. After the surface S has been scrubbed, a squeegee assembly 16 comprising a squeegee housing 17 and suction strips 18, arranged behind the tools 15 and in fluid communication with the recovery tank 12, sucks up the (now) dirty water. This dirty water contains a mixture of the clean water and any dirt scrubbed off of the surface S. The squeegee assembly 16 will be described in more detail with reference to FIGS. 2-4.

[0054] The scrubber-drier 1 shown in FIG. 1 is one exemplary embodiment of a cleaning device as disclosed herein. The embodiment shown in FIG. 1 comprises two tools 15. Although this is of course possible, this is not required. For the purpose of the present invention, a single tool 15 would suffice. Likewise, the inclusion of a handle 23, a top part 25 and the like are all optional.

[0055] FIGS. 2 and 3 show a back and an isometric view, respectively, of a no suction mode 16a of the squeegee assembly 16. In the no suction mode 16a, the suction strips 18 of the squeegee assembly 16 are elevated above the surface S, as indicated by the suction strips 18 not sticking out below castors 25 in FIG. 2a. Three castors 25 are coupled to the squeegee housing 17 and facilitate movement of the squeegee assembly 16, e.g. in a working direction W or in a reverse direction. Additionally, a hose connector 26 is coupled to the squeegee housing 17 to allow a hose to be connected for supplying water and / or a cleaning agent onto the surface S to be cleaned. Furthermore, the squeegee assembly 16 comprises two suction strips 18 arranged in the squeegee housing 17 to establish a relative vacuum in between the suction strips 18. The squeegee assembly 16 comprises an adjustment element 19 for adjusting the height H of the suction strips 18 with respect to the squeegee housing 17. The adjustment element 19 includes a lever located outside of the squeegee housing 17 that is here arranged in a first lever position 19a. With the lever in this first lever position 19a, the scrubber-drier 1 operates in the no suction mode 16a.

[0056] In FIGS. 4 and 5 a back and an isometric view, respectively, of the suction mode 16b of the squeegee assembly 16 is shown. In the suction mode 16b, the suction strips 18 are arranged on the surface S for removing water and / or cleaning agent from the surface S, as indicated by the suction strips 18 sticking out below the castors 25 in FIG. 4. The same elements from FIGS. 2 and 3 are shown, with the difference being that the adjustment element 19 includes a lever located outside of the squeegee housing 17 that is turned to a second lever position 19a. In this second lever position 19a, the scrubber-drier 1 operates in the suction mode 16b.

[0057] In addition, FIG. 6 shows an exploded view of the squeegee assembly 16. The squeegee assembly 16 comprises a retaining element 21 arranged inside the squeegee housing 17, which is configured to be coupled with the two suction strips 18 and is moveable in at least a vertical direction inside the squeegee housing 17. In the no suction mode 16a, the two suction strips 18 can be decoupled from the retaining element 21, allowing worn-out or damaged suction strips to be replaced by new suction strips. This is possible because the backside of the suction strips 18 features rubber protrusions 18a that fit into recesses of the retaining element 21, allowing the protrusion to be manually coupled and decoupled into the recess. In the no suction mode 16a, the two suction strips 18 are elevated above the surface S by means of compression springs 20 that push the retaining element 21, and, associated therewith, the two suction strips 18, upwards against the gravity force Fg. The squeegee assembly 16 also includes a bottom element 22 arranged inside the squeegee housing 17, which is configured to be coupled to the squeegee housing 17. In the suction mode 16b, the bottom element 22 is configured to block horizontal displacement of the two suction strips 18 relative to the squeegee housing 17. This is because in the suction mode, a protrusion of the bottom element 22a fits into a cut-out part 18b of the rubber protrusions 18a and a cut-out part 21a of the retaining element 21, thereby blocking the horizontal displacement of the two suction strips 18. In contrast, in the no suction mode 16a, the bottom element 22 is configured to allow horizontal displacement of the suction strips 18 relative to the squeegee housing 17, enabling their movement when needed. In more detail, the protrusion of the bottom element 22a is not fitted into the cut-out parts 18b of the rubber protrusion 18a and 21a of the retaining element 21, allowing horizontal displacement of the two suction strips 18.

[0058] In a non-shown embodiment, the adjustment element alternatively comprises an electrical actuator (not shown), such as a servo motor and / or an electromagnet, which allows the scrubber-drier 1 to switch between the no suction mode 16a and the suction mode 16b. The electrical actuator receives electrical power via the squeegee connection element (not shown).

[0059] In another non-shown embodiment, the squeegee assembly 16 can also be integrated into the frame 12 (not shown).

[0060] Additionally, in another non-shown embodiment, the squeegee assembly 16 comprises an electrically powered squeegee castor (not shown), which is configured to propel the scrubber-drier 1 to compensate for or overcompensate for the friction between the two suction strips 18 and the surface S.

[0061] Further shown in FIG. 7 is a sweepbox 22. The sweepbox 22 may be placed in between the cleaning tool(s) and the squeegee assembly and may collect relatively big parts of debris and dirt. For example, the sweepbox 22 may be coupled to the squeegee housing 17as shown in FIG. 1. More specifically, the sweepbox can be coupled in between the hose connector 26 and a hose (not shown). By collecting relatively large parts of debris and dirt, in the sweepbox 22, the suction strips of the squeegee assembly do not come in contact with such relatively large parts of debris and dirt and are protected so that their lifespan may be increased. To that effect, the sweepbox has a grating structure at its bottom. Any particles larger than the grating structure remain inside of the sweepbox 22, whereas any particles smaller than the grating structure (including fluids) will pass through the sweepbox towards the squeegee. By amending the size of the gratings, the amount of rigid particles captured in the sweepbox compared to the amount of rigid particles coming into contact with the suction strips of the squeegee assembly may be optimized.

Examples

Embodiment Construction

[0052]The present disclosure will now be described more fully hereinafter with reference to the accompanying drawings in which exemplary embodiments of the invention are shown. However, the disclosure may be embodied in many different forms and should not be construed as limited to the representative embodiments set forth herein. The exemplary embodiments are provided so that this disclosure will be both thorough and complete, and will fully convey the scope of the invention and enable one of ordinary skill in the art to make, use and practice the invention.

[0053]FIG. 1 shows a cleaning device 1 for cleaning surfaces S in particular floors, of all kinds of make and construction; including but not limited to concrete, tiles, PVC, marble, etc. The cleaning device 1 is shown in isometric view in FIG. 1. The cleaning device 1 shown here is known as a scrubber-drier, and will be referred to as such in the remainder of this description. The scrubber-drier 1 comprises a handle 23 with whic...

Claims

1. A cleaning device (1) for cleaning surfaces, the cleaning device (1) comprising:a spray element (11) for spraying at least one of water and a cleaning agent onto the surface to be cleaned;a recovery tank (12) for collecting dirty water with which the surface has been cleaned;a suction turbine (13) for providing a suction flow for sucking up dirty water with which the surface has been cleaned;a frame (14) including a cleaning tool (15) for cleaning the surface with at least one of water and cleaning agent,a squeegee assembly (16) for sucking up dirty water with which the surface has been cleaned, the squeegee assembly (16) comprising:a squeegee housing (17);two suction strips (18) arranged inside the squeegee housing (17); andan adjustment element (19) for adjusting a height (H) of the suction strips (18) with respect to the squeegee housing (17), between:a) a no suction mode (16a), wherein the cleaning tool (15) is arranged on the surface while the suction strips (18) are elevated above the surface, andb) a suction mode (16b), wherein the cleaning tool (15) is arranged on the surface for cleaning the surface while the two suction strips (18) are arranged on the surface for removing at least one of water and cleaning agent from the surface.

2. The cleaning device (1) according to claim 1, wherein the adjusting element acts on the suction strip(s) (18) inside of the squeegee housing (17).

3. The cleaning device (1) according to claim 1, wherein the adjustment element (19) comprises a lever configured to be turned from a first lever position (19a) to a second lever position (19b), wherein in the first lever position (19a) the cleaning device is in the no suction mode (16a) and wherein in the second lever position (19b) the cleaning device is in the suction mode (16b).

4. The cleaning device (1) according to claim 3, wherein, compared to the no suction mode (16a), in the suction mode (16b) the lever is rotated by more than 90 degrees.

5. The cleaning device (1) according to claim 1, wherein in the no suction mode (16a) the two suction strips (18) are elevated above the surface by means of compression springs (20) that push the two suction strips (18) upwards against the gravity force (Fg).

6. The cleaning device (1) according to claim 1, wherein in the suction mode (16b) the compression springs (20) are compressed, altering the height (H) of the two suction strips relative to the squeegee housing (17) such that the two suction strips (18) are arranged on the surface.

7. The cleaning device (1) according to claim 1, wherein the squeegee assembly (16) further comprises a retaining element (21) arranged inside the squeegee housing (17), the retaining element (21) configured to be coupled with the two suction strips (18) and moveable in at least a vertical direction inside the squeegee housing (17).

8. The cleaning device (1) according to claim 1, wherein the squeegee assembly (16) further comprises a bottom element (22) arranged inside the squeegee housing (17); the bottom element (22) configured to be coupled to the squeegee housing (17).

9. The cleaning device (1) according to claim 1, wherein in the suction mode (16b) the bottom element (22) is configured to block horizontal displacement of the two suction strips (18) relative to the squeegee housing (17) or wherein in the no suction mode (16a) the bottom element (22) is configured to make horizontal displacement of the suction strips (18) relative to the squeegee housing possible (17).

10. The cleaning device (1) according to claim 7, wherein in the no suction mode (16a) the two suction strips (18) can be decoupled from the retaining element (21) such that the two suction strips (18) can be replaced by new suction strips.

11. The cleaning device (1) according to claim 1, wherein a sweepbox (22) for collecting waste is coupled to the squeegee housing (17), at a position in between the cleaning tool (15) and the suction strips (18).

12. The cleaning device (1) according to any claim 1, wherein the cleaning device (1) comprises a squeegee connection element for coupling the squeegee assembly (16) to the frame (12).

13. The cleaning device (1) according to claim 1, wherein the adjustment element (19) comprises an electrical actuator, wherein in use of the electrical actuator, the cleaning device can be switched from the no suction mode (16a) to the suction mode (16b) and vice versa.

14. The cleaning device (1) according to claim 13, wherein the electrical actuator obtains electrical power via the squeegee connection element.

15. The cleaning device (1) according to claim 1, wherein the squeegee assembly (16) is integrated in the frame (12).

16. The cleaning device (1) according to claim 1, wherein the cleaning device comprises a controller, in communication with the suction turbine (13) and the squeegee assembly (16), the controller configured to control the activation of the suction turbine (13) such that in the suction mode (16b) the suction turbine is activated, and in the no suction mode (16a) is inactive.

17. The cleaning device (1) according to claim 1, wherein the squeegee assembly (16) comprises at least one electrically powered squeegee castor configured to propel of the cleaning device to compensate or to overcompensate a friction between the two suction strips (18) and the surface.

Images