RU2793729C1 - Surface cleaner with dirty liquid storage device - Google Patents

Abstract

FIELD: cleaning machines.

SUBSTANCE: machine for cleaning surfaces, containing a cleaning head (212) with at least one cleaning roller assembly (216; 218) driven in rotational motion, and a storage device (288) for dirty liquid, while it contains a probe device (310) to determine the filling degree (322) of the dirty liquid storage device (288). The invention was based on the problem of providing a surface cleaning machine that is simple and reliable in operation by providing the machine with a probe device for determining the filling degree of the dirty liquid storage device.

EFFECT: providing a surface cleaning machine that is simple and reliable in operation by providing the machine with a probe device for determining the filling degree of the dirty liquid storage device.

32 cl, 9 dwg

Description

The invention relates to a machine for cleaning surfaces, containing a cleaning head with at least one cleaning roller assembly driven in rotational motion, and a storage device for dirty (waste) liquid.

Surface cleaning machines are known from publications WO 2016/058901 A1, WO 2016/058856 A1, WO 2017/063663 A1, WO 2016/058879 A1, WO 2016/058956 A1. Also known from WO 2016/058907 A1 is a surface cleaning machine.

From the publication US 4875246 known portable floor cleaning device containing a roller driven by an electric motor.

From the publication DE 202009013434 U1, a device for wet cleaning of floors is known, containing a brush capable of rotating around an axis of rotation.

A cleaning machine is known from CN 201197698 Y.

From the publication US 6026529 known device for cleaning floors or other hard surfaces.

From the publication WO 2005/087075 A1, a floor harvester is known with a handle mounted on a base with the possibility of rotation.

Another floor cleaning machine is known from WO 2015/086083 A1.

From the publication US 3789449 known cleaning machine for cleaning hard floors.

CN 107007215 A discloses a floor cleaning robot.

DE 202018104772 U1 discloses a dirty water collection mechanism, a dirty water detection mechanism and a cleaning device.

The invention was based on the object of providing a surface cleaning machine of the type mentioned above, which is simple and reliable in operation.

This problem is solved in accordance with the invention in the aforementioned surface cleaning machine by providing the machine with a probe device for determining the degree of filling of the dirty liquid storage device.

Using a probe device, it is possible to determine whether the storage device has been filled with dirty liquid. This makes it possible, when a predetermined degree of filling of the storage device is reached, to block further operation of the surface cleaning machine or to inform the operator (in particular by optical and/or acoustic means) that the dirty liquid storage device must be emptied.

Thus, it is possible to prevent the dirty liquid storage device from overflowing and obtaining an unsatisfactory cleaning result; this excludes the possibility of dirty liquid overflowing over the edge of the storage device, as a result of which the dirty liquid may again be on the surface being cleaned.

In addition, it becomes easier for the operator to empty the storage device because, in particular, the predetermined filling level is set so that emptying the dirty liquid storage device is simple. In particular, the removal of the dirty liquid storage device will not be accompanied by splashing of the dirty liquid unless the storage device has a predetermined degree of filling.

In addition, the invention avoids possible damage to the floor covering as a surface to be cleaned by leaking or spilled liquid.

According to the invention, the probe device is made in the form of an electrode device. The probes are then, in particular, electrodes between which a voltage is applied or to which a current is applied. The determination of the resistance can be carried out in a simple manner, the change in resistance being indicative of the achievement of a predetermined degree of filling.

The above electrode device comprises at least one pair of electrodes, including a first electrode and a second electrode located at a distance from it, protruding into the receiving space of the dirty liquid storage device. The location of the electrodes determines the registered predetermined degree of filling of the storage device. If several pairs of electrodes are provided, consisting of a first electrode and a second electrode and located at different levels, it is possible to determine different predetermined degrees of filling of the storage device.

Further, according to the invention, the first electrode and the second electrode are fixedly connected to the dirty liquid storage device holder, the dirty liquid storage device being removable from the holder. This makes it possible to realize in a simple manner a probe device which does not have to be removed from the machine together with the dirty liquid storage device. This achieves the simplicity of the design.

Particularly advantageous is the variant in which the probe device is in the form of a resistance measuring device. Such a probe device may be of simple construction, may be simple to operate and to evaluate its signals. When using a resistance measurement device, it is possible to check in a simple manner whether there is dirty liquid between the probes of the probe device. This check can be done by measuring current or measuring resistance. If, for example, a predetermined degree of filling of the storage device is reached, and liquid (dirty liquid) appears between the probes of the probe device, a current will flow through the dirty liquid between the probes. This will cause a change in resistance compared to the case where there is no liquid between the probes. Such a change in resistance is detectable and indicates the achievement of a predetermined degree of filling of the storage device. This predetermined degree of filling, in turn, is determined by the mutual arrangement of the probes in the storage device. The probe device can be implemented in a simple and cost-effective manner when it is designed as a resistance measuring device. The corresponding probe device can be made less prone to malfunctions. The susceptibility to malfunctions when contacting dirt in a dirty fluid can also be reduced.

It is expedient to envisage a variant in which the electrode device is positioned and configured so as to be able to detect a predetermined degree of filling of the dirty liquid storage device. If the electrodes of the electrode device protrude into the receiving space of the storage device to a predetermined height, and pairs of electrodes are formed, then the predetermined degree of filling can be detected due to the ingress of liquid between the electrodes of one pair of electrodes.

In one embodiment of the invention, the electrode device is provided with a direct current or a constant voltage. A base signal is applied to the electrode device, and the degree of filling of the storage device can be determined from the response signal (reaction signal). In particular, a constant voltage is applied to the electrodes forming a pair of electrodes. In the absence of liquid between the electrodes of an electrode pair, no current can flow between the electrodes. In an idealized view, the resistance can be considered as infinitely high. If there is a liquid (dirty liquid) between the electrodes of a pair of electrodes, then a current will flow through the liquid. Due to the presence of fluid, resistance is reduced. As a result, an appropriate, identifiable response will occur. From a corresponding change in the response signal (which refers first to a resistance idealized as infinitely high and then to a finite resistance) it can be determined whether the liquid level in the dirty liquid storage device has reached the corresponding pair of electrodes.

An expedient option is in which the probe device is connected by a signal transmission line to a data processing device with the possibility of implementing at least one of the following functions:

- the data processing device controls the display device and/or the transmitter;

- the data processing device initiates the issuance of an indicator device and/or transmitter of a warning signal when it detects that a predetermined degree of filling has been reached;

- the data processing device checks the degree of filling of the storage device for dirty liquid by means of resistance detection;

- the data processing device controls the probe device, in particular by applying to it a direct current signal or a direct voltage signal;

the data processing device comprises a filtering device that checks for temporal changes in the signals of the probe device, the filtering device being configured in particular to recognize time-limited sloshing of dirty liquid in the dirty liquid storage device;

- the data processing device disables the drive of at least one cleaning roller assembly and/or the supply or the possibility of supplying the cleaning liquid upon detection of a predetermined degree of filling of the storage device for dirty liquid;

- when the surface cleaning machine is switched on, the data processing device blocks the rotary drive of at least one cleaning roller assembly and/or the suction of the dirty liquid in case of detecting a predetermined degree of filling of the storage device for the dirty liquid.

Due to the fact that the data processing device controls the indicator device, it is possible for the operator to be informed (indicated) of the degree of filling of the storage device for dirty liquid and, in particular, to issue a corresponding warning signal. If a transmitter is the object of the corresponding control, then the state of fullness of the dirty liquid storage device can be indicated, for example, on a remote control or on a mobile device and, in particular, a warning signal can be issued via this mobile device.

The data processing device preferably checks the degree of filling of the dirty liquid storage device by determining the resistance. Preferably, provision is made here for the data processing device to control the probe device, in particular by supplying it with a direct current signal or a direct voltage signal. The data processing device can then determine from the respective response signal the filling level of the storage device, in particular to recognize whether the predetermined filling level of the storage device has been reached.

The data processing device preferably comprises a filter device, in particular an electronic filter device, which checks for temporal changes in the signals of the probe device. In this way, it can be determined whether a relatively short-term sloshing of the dirty liquid occurs in the dirty liquid storage device. This allows some short-term sloshing to be filtered out in order to provide a reliable determination of the degree of filling of the storage device. In particular, the data processing device is designed in such a way that, upon detecting a predetermined degree of filling of the storage device for dirty liquid, it stops the operation of the machine for cleaning surfaces and/or blocks the machine from being switched on. This prevents, in particular, an overflow of the dirty liquid storage device. EFFECT: ergonomics of the machine in relation to emptying the storage device for dirty liquid is ensured, since the maximum filling level of the storage device (predetermined degree of its filling) is not exceeded. The possibility of damage to the floor covering by leaking or spilled dirty liquid is excluded.

A variant is expedient, in which the indicator device is located on the handle used by the operator to guide the cleaning head, and/or the indicator device is located on the cleaning head. This makes it easier for the operator to monitor the status of the dirty liquid storage device with regard to its fullness. The warning signal is easily recognized by the operator. In particular, an optical and/or acoustic signal is emitted by the display device.

In one embodiment of the invention, a first cleaning roller assembly and a second roller assembly spaced therefrom are provided, with a dirty liquid storage device located between the first cleaning roller assembly and the second roller assembly. In this case, in particular, the cleaning head rests on the surface to be cleaned by the first cleaning roller assembly and the second roller assembly. This ensures the relative stability of the dirty liquid storage device. The sloshing of the dirty liquid in the dirty liquid storage device is reduced.

In one embodiment of the invention, the second roller assembly is a second cleaning roller assembly or a sweeping roller assembly, wherein in particular the first cleaning roller assembly and the second roller assembly are provided to rotate in opposite directions. In principle, a variant is possible in which the second roller assembly is used exclusively as a support assembly without a surface cleaning function.

In one embodiment of the invention, a bridging wall is provided that is connected to the cleaning head and occludes the dirty liquid storage device. This ensures the simplicity of the design. In particular, in this case, the storage device for dirty liquid can be mounted on the cleaning head from below or to the side, and in this case, in particular, it can be located between the first cleaning roller assembly and the second roller assembly.

In this case, it is expedient for the electrodes of the probe device to be located on the overlapping wall and connected to the cleaning head, in particular connected in a fixed manner. This makes it possible to realize a probe device which does not have to be removed together with the dirty liquid storage device. For example, in this case, the overlapping wall itself forms a cover for the storage device, or an additional cover for the storage device is provided. Then it is provided with appropriate through leads for the electrodes.

In this case, it is expedient that the electrodes of the probe device protrude into the receiving space of the storage device for dirty liquid in the direction passing across the plane of the overlapping wall, and the first axis of rotation of the first cleaning roller assembly and the second axis of rotation of the second roller assembly are located in this plane. Said plane runs, in particular, parallel to the generatrix of the plane of the overlapping wall. This ensures the simplicity of the design. The electrodes can be fixedly mounted on the cleaning head.

In an alternative embodiment of the invention, the dirty liquid storage device is mounted in a removable manner on the rod-handle device on which the cleaning head is mounted. The handle bar device serves in particular to enable the operator to operate the surface cleaning machine while standing, in particular standing on the floor being cleaned by the surface cleaning machine. In particular, when the dirty liquid storage device is removable, the probe device is fixedly connected to the handle-rod device. Then disconnecting the dirty liquid storage device means that the probe device must not be removed together with the storage device.

It is also possible that the surface cleaning machine according to the invention is in the form of a self-propelled and self-guided machine, in particular in the form of a cleaning robot.

In addition, the machine for cleaning surfaces can be made in the form of a manually operated apparatus, having, in particular, a handle-rod device on which a cleaning head is mounted. In this case, the operator, in particular standing on the surface to be cleaned, controls such an apparatus, wherein the cleaning head rests on the surface to be cleaned by at least one cleaning roller assembly.

A variant is expedient, in which a dampening device is provided, by means of which a cleaning liquid is supplied to at least one cleaning roller assembly and/or to a surface to be cleaned, and the dampening device comprises a reservoir device for cleaning liquid. This achieves improved separation of contaminants from the surface to be cleaned.

A variant is expedient in which a cleaning fluid flow area is provided, through which the cleaning fluid flows from the cleaning fluid reservoir device when it is supplied to at least one cleaning roller assembly and/or to the surface to be cleaned.

A sensor device is located near the flow area, which detects the presence of a cleaning liquid in the flow area.

By checking for the presence of cleaning fluid in the flow region, it can be determined whether the reservoir device is empty (ie no longer contains cleaning fluid) or not. If the reservoir device is empty, there is no cleaning liquid in the flow area either.

This makes it possible to monitor the cleaning liquid reservoir device in a simple manner for emptying. Such verification can be carried out outside the reservoir device. This makes it easy to design a cleaning liquid reservoir device as well as a surface cleaning machine. Structural measures are not required to enable removal of the sensor device or part of the sensor device from the surface cleaning machine.

Due to the location of the sensor device near the flow area, the cleaning liquid reservoir device can be checked regardless of the position of the machine in space. In addition, the check performed by the sensor device is not affected by the sloshing of the cleaning liquid in the reservoir device.

Detection of the empty state of the cleaning liquid reservoir device makes it possible to block the operation of the surface cleaning machine without cleaning liquid in a simple manner. This ensures that a satisfactory cleaning result is obtained. It also makes it possible to prevent possible damage to the outer layer of the surface coating (e.g. floor covering), for which the results of a corresponding check carried out by the sensor device are used, for example, to switch off the surface cleaning machine, in particular to switch off the rotary drive of at least one cleaning roller. node.

A variant is expedient in which the flow region is formed by a section of a tube or hose. This ensures the simplicity of the design of the respective surface cleaning machine.

In one embodiment of the invention, the flow region, when the machine is used for its intended purpose, is located, in the direction of gravity, under the reservoir device for cleaning fluid. This makes it possible, in particular, to supply the cleaning liquid from the reservoir device to the at least one cleaning roller assembly and/or to the surface to be cleaned by gravity (under the action of gravity), in particular without creating an additional pressure. In particular, this does not require a pump.

For the same reasons, it is expedient for the flow area to be located, in the direction of the cleaning liquid flow, downstream of the connector for connecting the cleaning liquid reservoir device. This allows the filling of the cleaning fluid reservoir device to be checked by detecting the presence or absence of cleaning fluid (at least "discrete" states of cleaning fluid presence or an empty reservoir device). Such a check can be carried out practically regardless of the spatial position, and the splashing of the cleaning liquid in the reservoir device does not affect the result of the check.

In a structurally simple embodiment of the invention, a holder is provided on which, in particular in a removable manner, a reservoir device for cleaning liquid is mounted. This allows the cleaning liquid reservoir device to be installed in a simple manner in a surface cleaning machine, for example in a rod-handle device or in a cleaning head of a machine.

Simplicity of design is ensured if the holder has a connector for connecting the reservoir device for cleaning fluid.

In this case, it is provided, in particular, that the possibility of passing liquid through the flow region is associated with the drive of at least one cleaning roller assembly into rotation, and / or that the flow region is located, along the flow of the cleaning liquid, in front of the valve device for controlling the supply of cleaning liquid to the at least one cleaning roller assembly and/or to the surface to be cleaned. For example, when turning on the machine for cleaning surfaces, i.e. when its rotary drive is turned on, the cleaning liquid for supplying it to at least one cleaning roller assembly and/or to the surface to be cleaned can pass through the flow region, for example, also passing through the opening of the valve device. If the flow area is located in front of the valve device along the flow of the cleaning liquid, then the measurement can also be carried out with the valve device closed. In this case, a check for sufficient filling of the cleaning liquid reservoir device can be carried out, for example, before switching on the rotary drive. If it is determined, for example, that there is no liquid in the flow area, then the activation of the surface cleaning machine, and hence the rotary drive, can be blocked.

For structural reasons, it is advantageous for the flow region to be located at the holder. In particular, the flow area is in the form of a tube or hose mounted on a holder.

In a structurally simple embodiment of the invention, the sensor device is made in the form of a resistance measurement device. In this case, it can be checked in particular whether a first state with a high resistance or a second state with a resistance less than the high resistance takes place in particular. The first state indicates that the flow region is not filled with liquid. The second state characterizes the flow region in which the liquid is located. From these states, again, one can judge the degree of filling of the reservoir device for cleaning liquid; it can at least be concluded that no cleaning liquid is left in the reservoir device, or that there is still a supply of cleaning liquid.

In a structurally simple embodiment of the invention, a constant current or constant voltage is supplied to the electrode device. The response signal, in particular a voltage signal or a current signal, can then be used to at least indirectly determine the resistance.

From design considerations, an advantageous variant is that the sensor device comprises a first electrode and a second electrode located at a distance from it, the first electrode and the second electrode protruding into the flow region. The electrical resistance between the first electrode and the second electrode depends on whether there is liquid between the first electrode and the second electrode. If there is a cleaning liquid between the first electrode and the second electrode, a low resistance will be detected. If there is no liquid between the first electrode and the second electrode, then a high resistance will be determined, which in an idealized representation can be considered as infinitely high. The presence or absence of liquid can be determined from the result of the resistance determination.

In particular, the first electrode and the second electrode are fixed in the wall of the flow region, primarily fixed in the manufacture of the wall by injection molding. This allows a hermetically sealed flow area with an integrated sensor device to be obtained in a simple manner.

For structural reasons, it is advantageous for the first electrode and/or the second electrode to be made in the form of metal rods.

It is particularly advantageous if the sensor device is able to determine whether the cleaning fluid reservoir device is empty, where the indicator of emptying the cleaning fluid reservoir device is the absence of cleaning fluid in the flow region. As a result, the respective test can be carried out outside the cleaning liquid reservoir device. Accordingly, this makes it easy to remove the cleaning liquid reservoir device. Checking for the presence or absence of cleaning fluid can be carried out virtually regardless of the attitude of the machine. In this case, the splashing of the cleaning liquid in the reservoir device practically does not affect the result of the test.

An expedient option is in which the sensor device is connected by a signal transmission line to the data processing device with the possibility of implementing at least one of the following functions:

- the data processing device, based on the sensor data from the sensor device, determines the degree of filling of the reservoir device for cleaning liquid;

- the data processing device controls the touch device;

- the data processing device is connected by a signal transmission line to the indicator device and/or to the transmitter;

- the data processing device initiates the issuance of a warning signal when an empty cleaning liquid reservoir device is detected;

- the data processing device disables the rotary drive of at least one cleaning roller assembly when it detects that the cleaning liquid reservoir device is empty.

The data processing device generates, for example, an input signal for supply to the sensor device, such as a DC voltage signal. In this case, the data processing device determines, in particular, the response (output) signal of the sensor device, which can be used to infer the presence or absence of liquid in the flow area.

By means of an indicator device it is possible to inform or signal to the operator whether the storage device is empty and, for example, a warning signal can be issued. Due to the connection of the data processing unit to the transmitter implemented by the signal line, appropriate indication signals as well as warning signals can be transmitted, for example, to a remote control or to a mobile device such as a smartphone.

A variant is expedient, in which the indicator device is located on the handle used by the operator to guide the cleaning head, and/or is located on the cleaning head. This allows the operator to know in a simple way what the condition of the cleaning liquid reservoir device is. For example, an optical and/or acoustic warning signal is issued by means of an indicator device.

The implementation of the invention is discussed in more detail below on the example of its preferred options, illustrated by the drawings, which show:

in fig. 1 is a perspective view of the surface cleaning machine according to the invention in a first embodiment;

in fig. 2 is a view of the one shown in FIG. 1 machines for cleaning surfaces with a partial cut in the secant plane E;

in fig. 3 is an enlarged view of the region A indicated in FIG. 1;

in fig. 4 is a perspective view of the surface cleaning machine according to the invention in a second embodiment;

in fig. 5 is an enlarged view of the cleaning head of the surface cleaning machine shown in FIG. 4;

in fig. 6 is a sectional view of the cleaning head shown in FIG. 5;

in fig. 7 is a bottom view of the system shown in FIG. 5 cleaning heads with dirty liquid storage device removed;

in fig. 8 is a schematic sectional view of the surface cleaning machine according to the invention in a third embodiment; And

in fig. 9 is a diagram of a data processing device with a probe device for determining the degree of filling of the dirty liquid storage device, and with a sensor device for detecting the emptying of the cleaning liquid reservoir device.

The surface cleaning machine according to the invention, in its first embodiment shown generally in FIG. 1 and parts in Fig. 2 and 3, where it is denoted by the number 10, is made, in particular, in the form of a portable (manual) floor cleaning machine with manual control, designed for cleaning hard floors.

The surface cleaning machine 10 includes a frame 12 and a cleaning head 14. The cleaning head 14 is mounted on the frame 12.

During the cleaning operation of the surface to be cleaned 16, the surface cleaning machine 10 rests on the surface to be cleaned 16 with a cleaning roller assembly 18, in particular a single cleaning roller assembly 18. The cleaning roller assembly 18 has a single axis of rotation (see below). The cleaning roller assembly 18 is a single cleaning roller (also referred to as a roller) which may be one-piece or multiple. In the embodiment described below, the cleaning roller assembly 18 is a two-piece cleaning roller.

The frame 12 has a longitudinal axis 20. The surface cleaning machine 10 is held and driven by the handle. For this, a handle-rod device 22 is installed on the frame 12.

In one exemplary embodiment of the invention, the rod-grip device 22 includes a handle bar, in particular exactly one handle bar 24, the longitudinal extent of which is parallel to the longitudinal axis 20. In the upper part of the rod-grip device 22 is a handle 26, in particular a bracket-shaped handle. This handle 26 allows the operator to hold the surface cleaning machine 10 with one hand and drive it over the surface 16 to be cleaned (on which the machine is supported by the cleaning roller assembly 18).

The handle-rod device 22 can be made adjustable (sliding) or non-adjustable in length along the longitudinal axis 20.

The machine 10 for cleaning surfaces is designed in such a way that, with the cleaning roller assembly 18 resting on the surface to be cleaned 16, it is convenient for the operator to clean the surface 16 to be cleaned, holding the machine by the holder bent at an angle. In particular, the length of the surface cleaning machine 10, measured along the longitudinal axis 20 between the cleaning roller assembly 18 and the handle 26, is in the range of 60 to 130 cm.

On the handle 26 is located, in particular, one or more controls and indicator elements (see below). For example, a switch is located on the handle by means of which the surface cleaning machine 10 can be turned on for cleaning operation and turned off accordingly. This switch controls the operation of the drive motor 28 to drive the cleaning roller assembly 18. In addition, a switch may be provided to control the valve arrangement 38 (see below).

The frame 12 includes a housing 30 in which the components of the surface cleaning machine 10 are located in a protected manner.

A holder 32 is disposed on the housing 30. A reservoir device 34 for cleaning liquid (in particular fresh water with or without additional cleaning agent) is removably mounted on the holder 32.

In one embodiment of the invention, the reservoir device 34 comprises a single reservoir, in particular a single chamber for holding a supply of cleaning fluid.

Valve assembly 38 is located in housing 30.

One or more fluid lines 40 extend from valve assembly 38 to cleaning head 14.

The valve device 38 includes a shut-off valve, through which it is possible to control the shutoff of the supply of cleaning fluid from the reservoir device 34 to the cleaning head 14. The valve device 38 can be attached to a filter device 39 for cleaning fluid. The filter device 39 is included in the fluid path, in particular before the shut-off valve and is located between the valve device 38 and the support 36 of the reservoir device.

With the check valve open, cleaning fluid can flow from the reservoir device 34 through the fluid line or fluid lines 40 to the cleaning head 14 to act on the surface 16 to be cleaned.

To this end, the cleaning head 14 is provided with one or more cleaning fluid outlets. In this case, the outlet or outlets can, in principle, be located (s) with the possibility of supplying the cleaning liquid directly to the surface 16 to be cleaned.

In one expedient embodiment, the outlet or outlets are located so as to provide cleaning fluid to the cleaning roller assembly 18, in particular to the soft skin 42 of the cleaning roller assembly 18. In this case, when the cleaning fluid is supplied to the cleaning roller assembly 18, an indirect effect of the cleaning liquid on the surface to be cleaned 16.

The soft cover 42 (also referred to as a cap or "coat") is made, in particular, of a textile material.

Associated with the valve assembly 38 is a switch by which the user can operate the valve assembly 38 to close its check valve (i.e., block the flow of cleaning fluid to the cleaning head 14) or open the check valve (i.e., allow the flow of cleaning fluid from the reservoir device 34 to the cleaning head 14).

This switch can be located on the housing 30. In principle, it is also possible to carry out the invention in which said switch is located on the handle 26.

In one embodiment of the invention, a battery device 44 is located in the housing 30 for supplying the drive motor 28 with electrical energy. The battery device 44 is rechargeable. As a result, the surface cleaning machine 10 can be operated independently of the mains supply.

However, in principle, a variant is also possible in which the surface cleaning machine 10 is mains-operated. In this case, the machine 10 for cleaning surfaces has a corresponding device for connection to the mains supply.

In this case, the battery device 44 can be removed from the frame 12 to be recharged using an appropriate charger.

It can also be provided that an appropriate charger is built into the frame 12, which allows you to recharge the battery device 44 without removing it from the frame 12. The corresponding connection sockets are located, for example, on the handle bar 24.

The drive motor 28 is an electric motor. It has its own axis 46. The axis 46 of the motor coincides with the axis of rotation of the drive motor shaft 28.

The drive motor 28 is mounted on the frame 12 between the cleaning head 14 and the housing 30.

In one embodiment of the invention, the axis 46 of the engine is oriented at an angle to the longitudinal axis 20 of the frame 12 (and the handle bar 24). The angle between the motor axis 46 and the longitudinal axis 20 is, for example, in the range of 150° to 170°.

In one embodiment of the invention, the cleaning head 14 is rotatable about an axis 48 of rotation.

In particular, the axis 48 of rotation coincides with the axis 46 of the engine.

In one embodiment, the drive motor 28 is located on the inner sleeve 52. This inner sleeve 52 preferably forms a sealed casing of the drive motor 28.

The outer sleeve 54 is fixedly mounted on the frame 12. The inner sleeve 52 is installed in the outer sleeve 54. In this case, the inner sleeve 52 can be rotated relative to the outer sleeve 54 around the axis 48 of rotation, and the inner sleeve 52 is installed in the outer sleeve 54 with the possibility of rotation. The inner sleeve 52 and the outer sleeve 54 form a swivel bearing 56 allowing the cleaning head 14 to rotate relative to the frame 12. In this case, the drive motor 28 is rotatable relative to the frame 12 about the axis 48 of rotation. Corresponding wires supplying current from the battery device 44 to the drive motor 28 are positioned and configured to allow the aforementioned swivel capability. Accordingly, the liquid line 40 or liquid lines 40 are configured to allow the aforementioned pivotability.

The pivot bearing 56 has a basic position determined, for example, by the fact that the (single) axis 58 of rotation of the cleaning roller assembly 18 is oriented perpendicular to the plane E in FIG. 1. Rotation from this basic position around the pivot axis 48 results in the pivot axis 58 being set at an oblique angle (oblique) to plane E.

The swivel support 56 is adjusted, in particular, in such a way that in order to rotate the cleaning head 14 from its basic position, a special force must be applied in relation to the normal cleaning mode.

Rotation of the cleaning head 14 around the axis 48 of rotation improves the possibility of cleaning surfaces also in hard-to-reach places due to the fact that the frame 12 with the handle rod device 22 can be "rearranged" to a certain extent relative to the surface 16 being cleaned.

The cleaning head 14 has a cleaning roller holder 60 on which a cleaning roller assembly 18 is mounted and is rotatable about a rotation axis 58 . The holder 60 of the cleaning roller is connected to the inner sleeve 52 with fixation against rotation relative to it.

The cleaning roller holder 60 has a mounting area 62 for mounting the cleaning roller assembly 18 and a receiving chamber 64 for the dirty liquid storage device 66 .

The receiving chamber 64 is located between the mounting area 62 and the inner sleeve 52. The inner sleeve 52 is fixedly connected, in particular, to the outer side of the receiving chamber 64.

The cleaning roller assembly 18 is connected to a drive motor 28 to transmit torque from it through a transmission mechanism.

The transmission mechanism connects the drive motor shaft 28 (rotating around the motor axis 46) to the shaft 70 of the cleaning roller assembly 18 to transmit torque to the latter.

In one embodiment of the invention, the transmission mechanism includes a downshift. The reduction gear is used to reduce the speed compared to the speed of the engine shaft. For example, the speeds of a standard electric motor are in the order of 7000 rpm. The reduction gear reduces the speed to a value of, for example, about 400 rpm.

The reduction gear may be located in the inner sleeve 52 or outside the inner sleeve 52 on the holder 60 of the cleaning roller.

The reduction gear is made, for example, in the form of a planetary gear.

The gear mechanism also includes an angular gear for deflecting the axis of transmission of torque, which drives the cleaning roller assembly 18, the axis of rotation 58 of which runs transverse (in particular perpendicular) to the axis 46 of the motor. The corner gear is included in the kinematic chain, in particular behind the reduction gear.

In one exemplary embodiment of the invention, the angular gear comprises one or more gears in anti-rotation engagement with a respective downshift shaft. They act on a bevel gear to transmit torque at an angle.

In one embodiment of the invention, the transmission mechanism also includes a belt that is connected to the bevel gear to transmit torque from it and acts on the shaft 70. The belt bridges the distance between the shaft 70 and the bevel gear and provides a reduction in speed.

In one exemplary embodiment of the invention, the cleaning roller assembly 18 is made integral and consists of two parts: the first part 72 and the second part 74. The first part 72 is installed with a rotation lock on the first side of the shaft 70, and the second part 74 is installed with a rotation lock on the second side. side opposite the first side.

In the intermediate region 76 between the first part 72 and the second part 74 of the cleaning roller assembly is carried out and connected to the shaft 70 transmission mechanism. The first and second parts have the same axis 58 of rotation.

Cleaning roller assembly 18, i. e. the first part 72 and the second part 74 of the cleaning roller assembly 18 have a sleeve 78 which is cylindrical. On the sleeve 78 is a soft lining 42. Through the sleeve 78, the cleaning roller assembly 18, i. its first part 72 and second part 74 are fixed on the shaft 70.

The cleaning roller assembly 18 is located on the cleaning head 14 so that its axis of rotation 58 is oriented perpendicular to the longitudinal axis 20.

The cleaning roller assembly 18 has a length, measured along the axis of rotation 58 between the first end side 80 (formed on the first part 72) and the second end side 82 (formed on the second part 74), which is significantly greater than the corresponding width of the frame 12, measured perpendicularly longitudinal axis 20. In particular, the length of the cleaning roller assembly 18, measured between the first end side 80 and the second end side 82, is at least about 20 cm, preferably at least about 25 cm.

The receiving chamber 64 has a bottom. The wall of the receiving chamber, oriented across it, adjoins the bottom. The wall of the receiving chamber and the bottom of the receiving chamber 64 form a receiving space for the dirty liquid storage device 66 .

From the side opposite the bottom of the receiving chamber, the receiving space is open. Through the corresponding side of the storage device 66 for dirty liquid can be removed from the receiving space and inserted into it. The direction of removal and installation of the storage device is essentially perpendicular to the bottom (and perpendicular to the axis 58 of rotation).

The receiving chamber 64 is operatively associated with a locking device by means of which the dirty liquid storage device 66 is fixed in a fixed position on the wall of the receiving chamber. This fastening is ensured, in particular, by positive locking.

In one embodiment of the invention, the locking device 98 includes a flap 102 mounted on the cleaning head 14 by means of a pivoting support 106 for pivoting about a pivot axis. When this rotary support 106 is located on the inner sleeve 52 or near it.

The axis of rotation is oriented parallel to the axis 58 of rotation of the roller assembly 18.

In the locked position, the flap 102 acts on and holds the dirty liquid storage device 66 against the receiving chamber 64 in the receiving space.

To remove the storage device 66 from the cleaning head 14, it must be removed from this fixed position by turning the flap 102 in the direction of the frame 12 to release the storage device 66, after which it can be removed from the side of the receiving space in the direction of extraction and removed from the cleaning head 14.

For other details of the machine 10 for cleaning surfaces, you can refer to the publication WO 2017/153450 A1.

The cleaning head 14 includes a retractable device 110 that acts on the cleaning roller assembly 18 (and in doing so acts on the first part 72 and the second part 74) and serves to separate from the cleaning roller assembly 18 the dirty liquid entrained by it (in in particular, water with particles of pollution) and supply it to the inlet 112 of the storage device 66 for dirty liquid. Thus, the dirty liquid enters the storage device 66 to collect it.

Removable-diverting device 110 is designed to separate the dirty liquid from the cleaning roller assembly 18 and direct it to the inlet 112.

When the cleaning roller assembly 18 rotates, the dirty liquid guiding effect can be achieved by centrifugal force, and then the dirty liquid can be thrown to the periphery to some extent to be directed to the dirty liquid storage device 66 .

Removable-withdrawal device 110 is located at a distance from the axis 58 of rotation.

In one embodiment of the invention (see, for example, FIG. 5), the retractable device 110 protrudes, or sinks, into the soft skin 42 of the cleaning roller assembly 18 to a depth T. The depth T is, in particular, at least about 5% thickness D of the soft skin 42 of the cleaning roller assembly 18 in its wet state.

The retractable device 142 is formed, in particular, by one or more shields. For example, with the first part 72 and the second part 74 of the cleaning roller assembly 18 interacts with the corresponding shield.

For other details of the machine 10 for cleaning surfaces, you can refer to the publication WO 2017/153450 A1.

The holder 32 of the reservoir device 34 for cleaning fluid has a transverse part 114 (see Fig. 3), protruding from the handle bar 24 across the longitudinal axis 20. The reservoir device 34 is mounted on this transverse part 114 and is fixed on it, and additional fixation can be provided on the handle bar 24. In one embodiment of the invention, the reservoir device 34 is configured to be clamped between the transverse part 114 and a retaining protrusion 116 located at a distance from it.

The cleaning fluid storage device 34 has an outlet 118.

On the transverse portion 114 is a connector 120 for connecting the reservoir device 34. This connector 120 communicates with the outlet 118, so that the cleaning liquid can flow through the connector 120 into the apparatus. Connector 120 communicates through flow region 122 with fluid line 40, or flow region 122 may be considered part of fluid line 40.

The flow area 122 is located - in the direction of the flow 124 coming from the reservoir device 34 into the line 40 of the cleaning liquid - behind the reservoir device 34 for the cleaning liquid and in this case also behind the connector 120.

The flow area 122 is formed, in particular, by a section of the tube, which is built into the holder 32 and is integrated into the transverse part 114 of the holder 32 or is located on it. In particular, flow region 122 communicates directly with connector 120. Connector 120 forms the inlet of flow region 122.

The tube section is made, in particular, rigid.

A sensor device 126 is disposed at the flow region to check for the presence of liquid (cleaning fluid) in the flow region 122 . If there is no cleaning fluid in the flow area 122, then the cleaning fluid reservoir 34 is empty. By the presence of the cleaning fluid in the flow region 122, the state of filling of the reservoir device 34 with the cleaning fluid can be determined, i. e. it is possible to detect, in particular, the emptying of the reservoir device 34.

In particular, the flow area 122 is located, in the direction of the cleaning liquid flow 124, in front of the valve device 38.

In particular, it is provided that during the operation of the surface cleaning machine 10, the cleaning liquid is supplied to the cleaning roller assembly 18 by gravity (under the action of gravity). In this case, in particular, the machine does not contain a pump for supplying cleaning fluid.

In one embodiment of the invention, the flow area 122 is located downstream of the filter device 39 along the cleaning fluid flow. At the same time, the location of the flow area up to the filter device 39 can also be provided.

The sensor device 126 is designed in particular as a resistance measuring device. It is made in the form of an electrode device. To do this, it contains the first electrode 128 and the second electrode 130. The first electrode 128 and the second electrode 130 are located at a distance from each other. They protrude into the flow area 122, and in such a way as to be immersed in the cleaning liquid (if the cleaning liquid in the flow area 122 is present).

In one embodiment of the invention, the flow area 122 includes a wall 132, with the first electrode 128 and the second electrode 130 located on the wall 132, in particular fixed in it.

In one embodiment of the invention, the first electrode 128 and the second electrode 130 are made in the form of metal rods. In particular, the first electrode 128 and the second electrode 130 are fixed in the wall during its manufacture by injection molding or molded into the wall. This seals the flow region 122 in the first electrode 128 and the second electrode 130.

The first electrode 128 and the second electrode 130 are connected to the data processing device 134. For example, communication between them is implemented through the respective lines 136a, 136b.

The data processing device 134, in cooperation with the sensor device 126, functions essentially as follows:

A voltage, in particular a constant voltage, is applied between the first electrode 128 and the second electrode 130. In this case, a constant voltage can be applied continuously or in a pulsed mode.

If there is a liquid (cleaning liquid) in the flow region 122, the electrical resistance between the first electrode 128 and the second electrode 130 is relatively low. If there is no liquid in the flow region 122, there is an air bridge between the first electrode 128 and the second electrode 130 within the flow region 122.

Wall 132 is preferably made of a polymeric material that is electrically insulating. Thus, if there is no liquid in the flow region 122, and hence there is no liquid between the first electrode 128 and the second electrode 130, the resistance is high. So, the presence or absence of liquid in the flow region 122 can be determined from the result of the resistance detection.

It is provided, in particular, that when using the machine 10 for cleaning surfaces for its intended purpose, in which it rests with the cleaning roller assembly 18 on the surface 16 to be cleaned, the flow area 122 is located, in the direction of gravity, under the reservoir device 34 for cleaning liquid and at the same time under exit 118.

If the valve device 38 is located downstream of the flow area 122, this means that for the intended use of the machine, the flow area 122 is filled with liquid when the reservoir device 34 is installed and filled with a sufficient amount of liquid. This makes it possible, for example, even before the rotary drive of the cleaning roller assembly (from the drive motor 28) is switched on, to check that there is a sufficient amount of cleaning liquid to carry out the cleaning work.

The data processing device 134 also serves to control the sensor device 126 with the electrodes 128, 130. For example, the data processing device 134 includes an ASIC 138 for this purpose (FIG. 9).

To perform the measurement between the first electrode 128 and the second electrode 130, for example, a constant voltage is applied between the sensor device 126 (which can also be applied in a pulsed mode). The voltage drop is measured as a response signal.

In the presence of liquid in the flow region 122, there is some resistance between the first electrode 128 and the second electrode 130, determined by this environment. If there is no liquid between the first electrode 128 and the second electrode 130, this resistance can ideally be considered infinitely high.

If there is liquid between the electrodes 128, 130, current may flow through it. For this reason, resistance is finite. Then, by simply checking the resistance using a threshold value, the presence of liquid in the flow region 122 can be determined by means of the data processing device 134.

The sensor device 126 is connected to the data processing device 134 by a signal transmission line. The data processing device 134 is connected by a signal transmission line to the indicator device 140. The indicator device 140 comprises an optical and/or acoustic indicator. In one embodiment of the invention, the indicator device 140 includes an optical indicator 142 located on the handle 26.

The optical indicator 142 signals the emptying of the cleaning liquid reservoir device 34, for example by flashing or other means of indication.

Alternatively or in addition, the data processing device 134 is connected by a signal line to the transmitter 144. The transmitter 144 can send appropriate signals, in particular warning or indication signals, to the remote control 146 or to a mobile device such as a smartphone. The mobile device can then issue an appropriate warning or read information on whether the degree of filling of the cleaning liquid reservoir device 34 is sufficient or not.

The use of the sensor device 126 allows the empty state of the cleaning liquid container device 34 to be recognized in a simple manner and, by means of the indicator device 140, to inform the operator of the respective state of the container device in a simple manner. At the same time, due to the location of the flow area 122 under the connector 120, the result of determining the state of the reservoir device practically does not depend on the spatial position of the machine.

The flow area 122 is located on the transverse part 114 of the holder 32 and, in particular, is fixedly connected to it. Due to this, the system with the touch device 126 can be implemented in a structurally simple manner. No part of the sensor device 126 is required to be movable, i. the possibility of removing the reservoir device 34 for cleaning liquid does not structurally affect the sensor device 126. The splashing of the liquid in the storage device 34, as well as the dependence of the liquid level in the storage device 34 on the spatial position of the latter, do not affect the operation of the sensor device 126.

While the sensor device 126 is located outside the tank device 34 for cleaning liquid. The flow of current between the first electrode 128 and the second electrode 130 stops when the cleaning liquid reservoir 34 is empty, so that no liquid remains in the flow region 122 .

At the same time, the data processing device 134 makes it possible to implement the following functions:

If it is determined that the cleaning liquid reservoir 34 is empty before turning on the rotary drive, the rotation drive of the cleaning roller assembly 18 may be blocked by the processing device 134 .

If, during operation of the surface cleaning machine 10 (with the cleaning roller assembly 18 rotating), an empty cleaning liquid reservoir device 34 is detected, the data processing device 134 can initiate the issuance of an appropriate indication signal, in particular a warning signal, via the indicator device 140 or via the transmitter 144 .

If an emptying of the cleaning liquid reservoir 34 is detected while the machine is running, the data processing device 134 can initiate turning off the rotation of the cleaning roller assembly 18 by appropriately controlling the drive motor 28. This prevents, for example, damage to the surface 16 to be cleaned.

The surface cleaning machine 10 operates as follows:

During operation in the cleaning mode, the dirty liquid storage device 66 is fixed to the cleaning head 14 in a fixed position.

In operation, the surface cleaning machine 10 is placed on the surface 16 to be cleaned, supported only by the cleaning roller assembly 18. The drive motor 28 drives the cleaning roller assembly 18 into a rotational movement around a (single) rotation axis 58 in the rotation direction 158.

The cleaning roller assembly 18 is supplied with cleaning liquid from the reservoir device 34.

Contaminants present on the surface 16 being cleaned are wetted when exposed to the moistened soft lining 42 of the cleaning roller assembly 18, which facilitates the separation of contaminants from the surface 16 being cleaned.

The rotation of the cleaning roller assembly 18 provides a mechanical effect on the contaminants present on the surface 16 to be cleaned, for their better separation from the surface 16 to be cleaned.

Possibly falling large rubbish can be fed to the cleaning roller node 18 sweeping element.

Dirty liquid (contaminant particles, cleaning liquid with contaminants separated from the surface to be cleaned) is entrained by the cleaning roller assembly 18, and on the removable and diverting device 110, the dirty liquid is separated from the cleaning roller assembly 18 and (including under the action of centrifugal force) is directed to the inlet 112, from where it enters the storage device 66 for dirty liquid. Removable-withdrawal device 110, going into the rotating soft skin 42 of the cleaning roller assembly 18, removes dirty liquid from it.

The introduction of the dirty liquid into the storage device 66 takes place, in particular, without the use of a suction fan.

In an alternative embodiment of the invention, it is provided that the dirty liquid is sucked off the cleaning roller assembly 18 by means of a suitable suction device.

With the processing device 134 associated with the sensor device 126, the emptying of the cleaning liquid reservoir device 34 can be recognized. In this case, appropriate measures can be taken by the data processing device 134 .

The machine 210 for cleaning surfaces in the second example of its execution (Fig. 4-7) contains a cleaning head 212. The cleaning head 212 has a housing 214. On the body 214 of the head, the first cleaning roller assembly 216 and the second roller assembly are mounted at a distance from each other. in the form of a second cleaning roller assembly 218.

In one embodiment of the invention, the first cleaning roller assembly 216 and the second cleaning roller assembly 218 are made in one piece, i. the respective cleaning roller assembly is formed by a one-piece cleaning roller (also referred to as a roller).

In principle, it is also possible to make the first cleaning roller assembly 216 and/or the second cleaning roller assembly 218 composite, in particular consisting of two parts.

Each of the first cleaning roller assembly 216 and the second cleaning roller assembly 218 includes a (cylindrical) holder 220 on which a soft covering 222 of textile material is located. By means of the soft lining 222, the surface cleaning machine acts with its cleaning head 212 on the surface 224 to be cleaned.

The first cleaning roller assembly 216 is rotated about the first rotation axis 226 (during operation of the surface cleaning machine 210).

The second cleaning roller assembly 218 during operation is rotated around the second axis 228 of rotation. The first axis of rotation 226 and the second axis of rotation 228 are arranged in parallel at a distance from each other.

When the cleaning head 212 is placed by the first cleaning roller assembly 216 and the second cleaning roller assembly 218 on the flat surface 224 to be cleaned, supported by the first cleaning roller assembly 216 and the second cleaning roller assembly 218, the first rotation axis 226 and the second rotation axis 228 run parallel to the surface to be cleaned. 224.

The surface cleaning machine 210 includes a drive device 230 for respectively driving the first cleaning roller assembly 216 and the second cleaning roller assembly 218 into rotation.

In one embodiment, the drive device 230 includes a first drive 232 that rotates the first cleaning roller assembly 216 and a second drive 234 that rotates the second cleaning roller assembly 218.

The first drive 232 and the second drive 234 are formed, in particular, by electric motors.

The first drive 232 and the second drive 234 are located, in particular, inside the holder 220, respectively, of the first cleaning roller assembly 216 and the second cleaning roller assembly 218.

In this case, specifically, each of the first cleaning roller assembly 216 and the second cleaning roller assembly 218 is integral.

The first cleaning roller assembly 216 is driven in the first direction 236 of rotation, and the second cleaning roller assembly 218 is driven in the second direction 238 of rotation. In this case, the first direction of rotation 236 and the second direction of rotation 238 are opposite, i.e. the first cleaning roller assembly 216 and the second cleaning roller assembly 218 rotate towards each other.

The first direction of rotation 236 is such that the first region 240, with which the first cleaning roller assembly 216 has acted on the surface 224 to be cleaned, first moves to the region 242 located between the first cleaning roller assembly 216 and the second cleaning roller assembly 218 in the head housing 214.

Accordingly, the second direction of rotation 238 is such that the second region 244, with which the second cleaning roller assembly 218 has acted on the surface 224 to be cleaned, moves to the region 242 in the head housing 214.

In one embodiment of the invention, the surface cleaning machine 210 includes an adjustment device (indicated 246 in FIG. 6) by which an operator can adjust the rotation speed of the first cleaning roller assembly 216 in the first rotation direction 236 and/or the rotation speed of the second cleaning roller assembly. 218 in the second direction 238 of rotation.

If the rotational speed of the first cleaning roller assembly 216 is equal to the rotational speed of the second cleaning roller assembly 218, the rotation of the cleaning roller assembly 216 and 218 does not translate the cleaning head 212.

If the rotational speed of the first cleaning roller assembly 216 is greater than the rotational speed of the second cleaning roller assembly 218, then the cleaning head 212 is translated in the first direction 248. If the rotational speed of the second cleaning roller assembly 218 is greater than the rotational speed of the first cleaning roller assembly 216, then the cleaning head 212 performs translational movement in the second direction 250.

The first translation direction 248 and the second translation direction 250 are opposite.

The first translational direction 248 and the second translational direction 250 run transverse to the rotation axes 226 and 228 and in particular at right angles to them.

By creating an appropriate control action on the adjustment device 246, it is possible to control the cleaning head so that it does not move in translation, or so that it moves in translation in the first direction 248 or the second direction 250.

Attached to the cleaning head 212 by a hinge 252 is a handle-rod device 254. Through a hinge 252, the handle-rod device 254 can be rotated relative to the cleaning head 212 about an axis of rotation 256 when the cleaning head 212 is supported by its first cleaning roller assembly 216 and the second cleaning roller assembly 218. on the surface to be cleaned 224.

While the axis 256 of rotation runs parallel to the first axis 226 of rotation and the second axis 228 of rotation.

In the area of the proximal end 258, a handle is mounted on the handle-rod device 254, in particular a bracket-like handle 260. In the area of the distal end 262, the handle-rod device is articulated 252 with a cleaning head 212.

The operator, standing on the surface 224 to be cleaned behind the cleaning head 212, can hold the bracket-shaped handle 260 by hand. can set this angle of inclination according to his height.

The surface cleaning machine 210 is held by the bracket-shaped handle 260 while the hand is led over the surface to be cleaned.

On the rod-grip device 254 is a battery device 264, which is, in particular, rechargeable. From the battery device 264, the drive device 230 is supplied with electrical energy.

In principle, a variant is also possible in which a connector for connection to the mains supply is located on the hand-grip device, in which case the drive device 230 is powered by electrical energy from the mains.

On the handle-rod device 254 is also located reservoir device 266 for cleaning fluid.

At least one channel passes from the reservoir device 266 through the handle-rod device 54 to the cleaning head 212 and then through it, respectively, to the first outlet 268 facing the first cleaning roller assembly 216, and the second outlet 270 facing the second cleaning roller node 218.

The reservoir device 266 in one embodiment of the invention is provided with a sensor device corresponding to the sensor device 126 described above.

At the same time, in the direction of height passing from the surface to be cleaned 224, when the cleaning head 212 is properly supported on it, the first outlet 268 is located above the first cleaning roller assembly 216, and the second outlet 270 is located above the second cleaning roller assembly 218.

In one exemplary embodiment of the invention, the cleaning fluid reservoir 266 is provided with a valve arrangement configured to automatically open during operation of the drive 230 and thereby allow the cleaning fluid from the reservoir 266 to pass through the first outlet 268 to the first cleaning roller. node 216 and for its supply through the second outlet 270 to the second cleaning roller node 218.

The first outlet 268 and the second outlet 270 are specifically configured to supply the cleaning liquid to the first cleaning roller assembly 216 and the second cleaning roller assembly 218, respectively, over a longer length parallel to the respective axis 226, 228.

The area of the first cleaning roller assembly 216, moistened with the cleaning liquid supplied through the first outlet 268, rotates in the first direction of rotation 236 until it contacts the surface 224 to be cleaned, and when exposed to this surface to be cleaned 224 becomes the aforementioned first region 240 there. The first cleaning roller assembly 216 mechanically acts on the surface to be cleaned 224. Its moisture content softens or dissolves contaminants and thereby improves cleaning efficiency.

Accordingly, the moistened area of the second cleaning roller assembly 218 rotates in the second direction 238 of rotation until it contacts the surface 224 to be cleaned and becomes there the aforementioned second area 244, while the second cleaning roller assembly operates in the same way as described above for the first cleaning roller assembly 216.

The first cleaning roller assembly 216, after its action on the surface 224 to be cleaned, carries away the impurities in the first direction 236 of rotation. The second cleaning roller assembly 218 carries away dirt in the second direction 238 of rotation.

In principle, it is also possible that the reservoir device 266 is located on the cleaning head 212.

On the cleaning head 212 is a first scoop 272 operatively associated with the first cleaning roller assembly 216. In addition, on the cleaning head 212 is a second scoop 274 operatively associated with the second cleaning roller assembly 218.

The first scoop 272 and the second scoop 274 project down past the head body 214 toward the surface 224 to be cleaned.

The task of the first scoop element 272 is to hold large debris in place, i.e. to prevent it from entering a certain area from the first cleaning roller assembly 216 to the second cleaning roller assembly 218. On the first scoop element 272, coarse debris can collect to some extent, which can then be entrained due to the rotation of the first cleaning roller assembly 216 in the first direction 236 of rotation.

The second scoop 274 performs the same function in conjunction with the second cleaning roller assembly 218.

In principle, it is also possible to have only the first scoop 272 or the second scoop 274.

In one embodiment of the invention, the surface cleaning machine 210 includes a fan device 278. The fan device includes a fan and a drive motor, in particular an electric motor. This electric motor is supplied with electrical energy from the battery device 264 or, alternatively, from the mains. Fan device 278 creates the vacuum required to create suction flow.

From the fan device 278, respective channels 280, 282 extend to the first receiver 284 (FIGS. 4, 5) facing the first cleaning roller assembly 216 and to the second receiver 286 facing the second cleaning roller assembly 218.

With an appropriate suction flow, the dirty liquid is separated from the first cleaning roller assembly 216 and taken through the first receiving device 284. Also, the dirty liquid is separated from the second cleaning roller assembly 218 and taken through the second receiving device 286.

In operative connection with the fan device 278 is a dirty liquid storage device 288 which receives the collected dirty liquid.

The storage device 288 can be located, in particular in a removable manner, on the handle-rod device 254.

In one embodiment of the invention, the storage device 288 may be located on the cleaning head 212, in particular, between the first cleaning roller assembly 216 and the second cleaning roller assembly 218. Such a storage device is indicated in FIG. 6 reference number 290.

The dirty liquid storage device 288, 290 respectively communicates with the fan device 278, whereby the dirty liquid entrained by the suction flow can be introduced into this storage device.

In one embodiment of the invention, the first receiving device 284 is located, in the first direction of rotation 236, in front of the first outlet 268, i. the first area 240, with which the first cleaning roller assembly has acted on the surface to be cleaned 224, first passes the first receiver 284, and only then past the first outlet 268. The second receiver 286, facing the second cleaning roller assembly 218, acting on the surface to be cleaned the second area 244 is located accordingly.

Looking in the first direction of rotation 236, the first receptacle 284 is positioned between the first scoop 272 and the first outlet 268.

Looking in the second direction of rotation 238, the second receptacle 286 is positioned between the second scoop 274 and the second outlet 270.

In FIG. 5, the locations of the first receiver 284 and the second receiver 286 are indicated respectively. The first receiving device 284 faces the first cavity 292 of the cleaning head 212, in which the first cleaning roller assembly 216 is located. At the same time, in the direction of height passing from the surface 224 to be cleaned, when the cleaning head 212 is properly supported by the first cleaning roller assembly 216 and second cleaning roller assembly 218, the first receiving device 284 is located above the first cleaning roller assembly 216.

The second receptacle 286 is appropriately positioned with respect to the second cleaning roller assembly 218. The second cleaning roller assembly 218 is located in the second seat 294 of the cleaning head 212 and the second receptacle 286 faces this second seat 294.

This allows dirty liquid to be sucked directly from the first cleaning roller assembly 216 and the second cleaning roller assembly 218.

In this case, the first receiving device 284 and the second receiving device 286 have such a length of their inlet openings in a direction parallel to the first axis of rotation 226 and the second axis of rotation 228, so as to ensure the suction of dirty liquid over a correspondingly long length of the first cleaning roller assembly 216 and the second cleaning roller node 218.

Also, for example, it is possible that only the receivers corresponding to the receivers 296 and 298 located adjacent to the respective cleaning roller assemblies 216 and 218 communicate with the fan device 278. For example, the first cleaning roller assembly 216 may interact with the first receiver 300 , and with the second cleaning roller assembly 218, a second receptacle 302 that exit directly into the storage device 290 (FIG. 6). In particular, in this case, the first receptacle 200 and the second receptacle 202 may be provided with respective scrapers 304, 306 removing the dirty liquid from the first cleaning roller assembly 216 and the second cleaning roller assembly 218, respectively, in which case the dirty liquid through the first receiving device 300 and the second receiving device 302, which are not in communication with the fan device 278, enter directly into the storage device 290. For example, in this case, the dirty liquid is sucked through the receiving devices 296, 298 and removed by scrapers without applying the suction flow through the receiving devices 300 and 302 .

To use the surface cleaning machine 210, the cleaning head 212 is placed on the surface to be cleaned by the first cleaning roller assembly 216 and the second cleaning roller assembly 218. These cleaning roller assemblies are rotated in the first direction 236 and the second direction 238, respectively. the cleaning head can be translated in the direction 248 or 250.

The cleaning roller assemblies 216 and 218 are moistened with the cleaning liquid coming from the reservoir device through the first outlet 268 and the second outlet 270, respectively. 244 of the second cleaning roller assembly 218, separating contaminants from it. The separation of contaminants from the surface to be cleaned is facilitated by wetting the cleaning roller units with the cleaning liquid stored in the reservoir device.

Contaminants are captured by the soft lining 222 of the first and second cleaning roller assemblies 216, 218 and carried by it in the first 236 and second 238 directions of rotation, respectively.

Large rubbish possibly gathering on the first scoop element 272 and the second scoop element 274 is entrained in the first 236 and second 238 directions of rotation, respectively.

Depending on the design of the cleaning head 212, the dirty liquid is sucked off by means of the fan device 278, for example, through the first receiving device 284 and the second receiving device 286.

It is also possible that the dirty liquid is discharged into the storage device 290, respectively through the first receiving device 300 and the second receiving device 302, without the use of a fan, by removing it from the cleaning roller units with scrapers (see Fig. 6).

The machine 210 for cleaning surfaces is provided with two counter-rotating cleaning roller units 216, 218. This achieves the application to the cleaned surface 224 of the full pressure created by the cleaning roller units, regardless of the position of the handle-rod device 254 relative to the surface 224 to be cleaned in terms of the angle of inclination.

It also ensures that the distance from the scoops 272, 274 to the surface 224 to be cleaned is maintained.

In addition, impurities discarded by one cleaning roller assembly 216, 218 can be captured respectively by another cleaning roller assembly 218, 216.

The dirty liquid storage device 290 is disposed between the first cleaning roller assembly 216 and the second cleaning roller assembly 218. This provides a short path for the dirty liquid to at least directly drain away from the cleaning roller assemblies. In addition, this ensures a low center of gravity and easy cleaning of the storage device.

In operative connection with the dirty liquid storage device 290 is a probe device 310 (FIGS. 4-7, FIG. 9) enabling the determination of the degree of filling of the dirty liquid storage device 290.

The probe device 310 is designed, in particular, as an electrode device, or a resistance measurement device. To do this, the probe device 310 includes a first electrode 312 and a second electrode 314 located at a distance from it.

The first electrode 312 and the second electrode 314 are positioned and configured to protrude into the receiving space 316 of the dirty liquid storage device 290.

While the electrodes are located at a distance from the bottom 318 of the storage device 290 for dirty liquid. They are arranged so that when the liquid level 320 rises (see FIG. 6) in the receiving space 316, this liquid level 320 rises in the direction of the electrodes 312, 314.

A DC voltage is applied between the first electrode 312 and the second electrode 314. The DC voltage supply can also be carried out in a pulsed mode.

When the liquid level 320 is below the electrodes 312, 314 (see FIG. 9), there is an air bridge between the electrodes 312, 314 and no current can flow. In an idealized view, this can be seen as that the electrical resistance between the first electrode 312 and the second electrode 314 is infinitely high.

When the liquid level 320 reaches the electrodes 312, 314, a current may flow through the liquid between the first electrode 312 and the second electrode 314. In this case, the resistance will become finite. The transition from idealized infinite resistance to finite resistance is measurable. In this way, it is possible to detect that the liquid level 320 has reached a predetermined degree of filling 322 . The desired degree of filling is determined by the location of the first electrode 312 and the second electrode 314.

In particular, the probe device 310 is associated with a data processing device. In one embodiment of the invention, this data processing device corresponds to the data processing device 134 used to process data from the sensor device 126. However, a separate data processing device may also be provided for the probe device 310.

For example, a voltage is applied between the first electrode 312 and the second electrode 314 through the ASIC terminal 324, which is specifically the ASIC 138. The corresponding voltage is the input signal. The dropped voltage, taken in particular at terminal 326, is the corresponding response signal.

There is resistance between the first electrode 312 and the second electrode 314. If there is no liquid between the electrodes, then in an idealized representation this resistance can be considered as infinitely high. When the liquid level 320 reaches the electrodes 312, 314, a current may flow. In this case, the resistance will become finite, and the voltage taken at terminal 326 will change. This change is caused by the liquid level 320 rising to reach the predetermined degree of filling 322 . Accordingly, this event can be detected by the threshold value 322 and determine the level 320 of the liquid at least "discretely".

An indicator device 328 is provided to provide optical and/or acoustic signaling to the operator that a predetermined degree of filling 322 of the dirty liquid storage device 290 has been reached. The indicator device 328 includes an optical and/or acoustic element 330 located, in particular, on the handle 60. For example, when a predetermined degree of filling 322 is reached, the optical element 330 flashes.

Alternatively or in addition, the data processing device 134 is connected by a signaling line to a transmitter corresponding to the transmitter 144 and allowing appropriate warning or indication signals to be sent to the remote control or mobile device 146 .

In this case, the data processing device 134 makes it possible to realize, in particular, the following functions:

The data processor 134 supplies the probe device 310 with a DC voltage, which can also be pulsed. The response signal (response signal of the probe device), taken, in particular, at terminal 326, is a voltage. This allows at least an indirect measurement of the resistance. In this way, it can be checked whether the predetermined degree of filling 322 has been reached.

In principle, during operation of the surface cleaning machine 210, liquid may slosh in the receiving space 316 of the storage device 290. It is envisaged that the data processing device 134 includes a filter device capable of detecting momentary changes in resistance. Only states of greater duration are used to determine the degree of filling of the storage device 322 . This makes it possible to confidently determine whether a predetermined filling level 322 of the storage device has been reached; the use of a filtering device makes it possible to filter out short-term splashes of the liquid to some extent.

If it is detected that the predetermined degree of filling of the storage device 322 with dirty liquid is detected (steadily), the data processing device 134 causes the output of an appropriate signal to the indicator device 328 or the transmitter 144. In particular, the issuance of appropriate warning signals is initiated or carried out.

It can also be provided that upon detection of reaching a predetermined degree 322 of filling the storage device with dirty liquid, the rotary drive of the cleaning roller units 16, 18 and / or the operation of the fan device is turned off to prevent further entry of dirty liquid into the storage device 290.

Also, for example, if the achievement of a predetermined degree of filling the storage device 322 with dirty liquid is detected before turning on the surface cleaning machine 210, the rotary drive of the cleaning roller assemblies 216, 218 or the operation of the fan device may be blocked.

In principle, it is also possible to use the probe device 310, for example in a surface cleaning machine 10, in which the respective cleaning liquid container device 34 is provided with a sensor device 126.

In addition, for the dirty liquid storage device 66 of the surface cleaning machine 10, a probe device corresponding to the probe device 310 can be used.

In the surface cleaning machine 210, the dirty liquid storage device 290 is located between the first cleaning roller assembly 216 and the second cleaning roller assembly 218. An overlapping wall 332 (see Fig. 7) is provided that overlaps the storage device 290 from above (in Fig. 7 this storage device 290 is removed).

The first electrode 312 and the second electrode 314 are mounted on the overlapping wall 332. They are oriented transversely to the plane 334 (FIG. 7) in which the first rotation axis 226 and the second rotation axis 228 are located.

In one embodiment, the overlapping wall 332 forms a lid for the dirty liquid storage device 290.

In an embodiment of the invention in which the surface cleaning machine rests on the surface to be cleaned 224 during cleaning by the first cleaning roller assembly 216 and the second cleaning roller assembly 218, while the accumulator 290 is located in a removable manner on the cleaning head 212 between these cleaning roller assemblies 216 , 218, the position of the accumulator 290 during cleaning is very stable relative to the surface 224 to be cleaned; shaking of the storage device is possible only when overcoming the irregularities on the cleaned surface 224. This allows you to reliably measure the specified degree of filling 322 of the storage device.

The filling level is determined by measuring the resistance only. This does not require any special expensive and fault-prone sensors. It also reduces the likelihood of malfunctions when in contact with contaminants contained in the dirty fluid.

The first electrode 312 and the second electrode 314 are made, in particular, in the form of metal rods protruding into the receiving space 316. When a predetermined filling level 322 of the storage device is reached, a conductive connection is formed between these electrodes 312, 314. The use of a filtering device in the data processing device 134 makes it possible to recognize and "sort out" the effects of liquid sloshing. This makes it possible to eliminate the erroneous interpretation of the currents flowing due to liquid sloshing as indicating that a predetermined degree of filling 322 of the storage device has been reached.

In principle, it is possible that the probe device 310 contains several pairs of electrodes. This makes it possible to register the rise of the liquid level to various intermediate values before reaching the predetermined degree of filling 322 .

As mentioned above, the probe device 310 can also be used, for example, also in the storage device 66 of the machine 10 for cleaning surfaces.

The surface cleaning machine according to the invention, in the third embodiment shown schematically in FIG. 8, where it is designated 340, is a self-propelled and self-guided vehicle ("cleaning robot").

The surface cleaning machine 340 includes a cleaning head 342. A first cleaning roller assembly 344 is mounted on it. It is driven to rotate about a first axis 346 of rotation. To this end, a corresponding rotary drive is located on the cleaning head 342 (not shown in FIG. 8).

At a distance from the first cleaning roller assembly 344, a second roller assembly 348 is located on the cleaning head 342. The second roller assembly is driven about a second axis 350 of rotation. In particular, it is driven into rotation by means of a corresponding rotary drive.

The cleaning head 342, and thus the surface cleaning machine 340 itself, is supported on the surface 16 to be cleaned by the first cleaning roller assembly 344 and the second cleaning roller assembly 348.

The second roller assembly 348 is made, for example, in the form of a sweeping roller assembly.

A dampening device 352 is provided, through which a cleaning liquid (fresh water with or without detergent) is supplied to (at least) the first cleaning roller assembly 344.

Humidifier device 352 includes a reservoir device 354 for cleaning fluid. The reservoir device 354 is located on the cleaning head 342.

A flow region 356 is associated with the reservoir device 354. The sensor device corresponding to the sensor device 126 is located at the flow region 356. The same reference numbers are used to designate the same elements.

One or more lines 358 extend from the flow region 356 to a nozzle assembly 360 through which cleaning fluid is supplied to the first cleaning roller assembly 344.

The touch device 126 is connected by a signal transmission line to the data processing device 362 corresponding to the data processing device 134 .

The sensor device 126 can determine whether the reservoir device 354 is empty. This is signaled by an indicator device 364 located on the cleaning head 342.

It is also possible that the data processing device 362 controls the transmitter 366, for example, to indicate on a mobile device, such as a smartphone, the degree of filling of the cleaning liquid reservoir device 354, or to issue a warning to the mobile device.

The cleaning head 342 also has a dirty liquid storage device 368 removably mounted. This accumulating device 368 discharges the dirty liquid separated or sucked from the first cleaning roller assembly 344.

In principle, the storage device 368 can also be discharged, for example, swept rubbish moving along the inclined surface 370.

In operative connection with the dirty liquid storage device 368 is a probe device corresponding to the probe device 310. At least two electrodes protrude into the receiving space of the storage device 368. The corresponding probe device 310 is connected by a signal transmission line to the data processing device 362 .

This makes it possible to determine the degree of filling of the storage device 368, in particular to detect that a predetermined degree of filling of the storage device with dirty liquid has been reached.

The data processing device 362 is connected by a signal transmission line to an indicator device 372, this indicator device 372 being related to the probe device 310. The indicator device 372 is located on the cleaning head 342. It signals (optically and/or acoustically) whether the predetermined degree of filling of the storage device has been reached. 368.

In addition, the transmitter 366 can initiate the issuance of an appropriate status signal or warning signal, such as a smartphone or other similar device.

If an emptying of the cleaning liquid reservoir device 354 and/or reaching a predetermined degree of filling of the storage device 368 with dirty liquid is detected, the surface cleaning machine 340, for example, is turned off or sent to a docking station (in particular, to a charging station).

Otherwise, the probe device 310 or sensor device 126 operates in cooperation with the data processing device 362, as described above with respect to the data processing device 134.

List of reference designations:

10 surface cleaning machine (first example)

12 frame

14 cleaning head

16 cleaning surface

18 cleaning roller assembly

20 longitudinal axis

22 hand-rod device

24 handle bar

26 handle

28 drive motor

30 building

32 holder

34 cleaning liquid reservoir device

36 tank device support

38 valve device

39 filter device

40 liquid line 42 soft cover

44 battery device

46 axle motor

48 axis of rotation

50 double arrow

52 inner sleeve

54 outer sleeve

56 swivel support

58 rotation axis

60 cleaning roller holder

62 artboard

64 receiving chamber

66 dirty liquid storage device

70 shaft

72 first part

74 second part

76 staging area

78 sleeve

80 first end side

82 second end

88 receiving space

100 fixed position

102 sash

106 swivel support

108 direction

110 pull-out device

112 inlet

114 cross section

116 restraint

118 exit

120 connector

122 flow area

124 flow direction

126 touch device

128 first electrode

130 second electrode

132 wall

134 data processing device

136a line

136b line

138 ASIC

140 indicator device

142 optical indicator

144 transmitter

146 remote control, mobile device

210 surface cleaning machine (second example)

212 cleaning head

214 head body

216 first cleaning roller assembly

218 second cleaning roller assembly

220 holder

222 upholstered

224 cleaning surface

226 first axis of rotation

228 second axis of rotation

230 drive unit

232 first drive

234 second drive

236 first direction of rotation

238 second direction of rotation

240 first region

242 area

244 second region

246 adjustment device

248 first direction of forward movement

250 second direction of forward movement

252 hinge

254 hand-rod device

256 axis of rotation

258 proximal end

260 bracket handle

262 distal end

264 battery device

266 cleaning liquid reservoir device

268 first outlet

270 second outlet

272 first scoop element

274 second scoop element

276 longitudinal direction

278 fan device

280 channel

282 channel

284 first receiver

286 second receiver

288 dirty liquid storage device

290 dirty liquid storage device

292 first nest

294 second socket

296 first receiver

298 second receiver

300 first receiver

302 second receiver

304 scraper

306 scraper

310 probe device

312 first electrode

314 second electrode

316 receiving space

318 accumulator bottom

320 liquid level

322 predetermined degree of filling

324 output

326 output

328 indicator device

330 optical and/or acoustic element

332 overlapping wall

334 plane

340 surface cleaning machine (third example)

342 cleaning head

344 first cleaning roller assembly

346 first axis of rotation

348 second roller assembly

350 second rotation axis

352 humidifier

354 cleaning liquid reservoir device

356 flow area

358 line

360 nozzle device

362 data processing device

364 indicator device

366 transmitter

368 dirty liquid storage device

370 inclined surface

372 indicator device

Claims (44)

1. A machine for cleaning surfaces, containing a cleaning head (212; 342) with at least one cleaning roller assembly (216; 218; 344) driven in rotational motion, a storage device (288; 368) for dirty liquid and a probe device ( 310), designed to determine the degree (322) of filling the storage device (288; 368) for dirty liquid and made in the form of an electrode device containing the first electrode (312) and the second electrode (314) located at a distance from it, protruding into the receiving space (316) of the storage device (288; 368) for dirty liquid and fixedly connected to the holder (212; 342) of the storage device (288; 368) for dirty liquid, and the storage device (288; 368) for dirty liquid is made with the possibility of its removal from the specified holder (212; 342). 2. Surface cleaning machine according to claim 1, characterized in that the probe device (310) is in the form of a resistance measuring device. 3. Machine for cleaning surfaces according to claim 1, characterized in that the electrode device is positioned and configured to detect a predetermined degree (322) of filling of the storage device (288; 368) for dirty liquid. 4. A machine for cleaning surfaces according to claim 1 or 3, characterized in that it provides for the supply of direct current or direct voltage to the electrode device. 5. Machine for cleaning surfaces according to one of the previous claims, characterized in that the probe device (310) is connected by a signal transmission line to the data processing device (134) with the ability to implement at least one of the following functions: - the data processing device (134) controls the indicator device (328) and/or the transmitter (144); - the device (134) data processing initiates the issuance of the indicator device (328) and/or the transmitter (144) of a warning signal when it detects that a predetermined degree of filling (322) has been reached; - the device (134) data processing by determining the resistance checks the degree of filling of the storage device (66; 288) for dirty liquid; - the data processing device (134) controls the probe device (310) by applying a DC signal or a DC voltage signal to it; - the data processing device (134) comprises a filtering device that checks for temporal changes in the signals of the probe device (310), the filtering device being configured to recognize a time-limited sloshing of the dirty liquid in the dirty liquid storage device (66; 288); - the data processing device (134) disables the drive of at least one cleaning roller assembly (216; 218) and/or the supply or the possibility of supplying the cleaning liquid upon detection of a predetermined degree (322) of filling the storage device (66; 288) for dirty liquid; - when the machine for cleaning surfaces is turned on, the data processing device (134) blocks the rotary drive of at least one cleaning roller assembly and/or the suction of dirty liquid in case of detecting a predetermined degree (322) of filling the storage device for dirty liquid. 6. Machine for cleaning surfaces according to claim 5, characterized in that the indicator device (328) is located on the handle (260) used by the operator to guide the cleaning head (212), and / or the indicator device (328) is located on the cleaning head ( 342). 7. Machine for cleaning surfaces according to one of the previous paragraphs, characterized in that the cleaning head (212; 342) contains the first cleaning roller assembly (216; 344) and a second roller assembly (218; 348) located at a distance from it, and the accumulative the dirty liquid device (288; 368) is located between the first cleaning roller assembly (216; 344) and the second roller assembly (218; 348). 8. Surface cleaning machine according to claim 7, characterized in that the second roller assembly is a second cleaning roller assembly (218) or a sweeping roller assembly (348). 9. Surface cleaning machine according to claim 7 or 8, characterized in that it comprises a bridging wall (332) connected to a cleaning head (212) and bridging a dirty liquid storage device (288). 10. Surface cleaning machine according to claim 9, characterized in that the electrodes of the probe device (310) are located on the overlapping wall (332) and are connected to the cleaning head (212). 11. A machine for cleaning surfaces according to claim 9 or 10, characterized in that the electrodes (312; 314) of the probe device (310) protrude into the receiving space (316) of the storage device (288) for dirty liquid in a direction passing across the plane ( 334) overlapping wall (332), and in this plane (334) are the first axis of rotation (226) of the first cleaning roller assembly (216) and the second axis (228) of rotation of the second roller assembly (218). 12. Machine for cleaning surfaces according to one of paragraphs. 1-6, characterized in that the storage device (288) for dirty liquid is installed in a removable manner on the handle-rod device (22), on which the cleaning head (14) is installed. 13. Machine for cleaning surfaces according to one of the preceding paragraphs, characterized in that it is made in the form of a self-propelled and self-guided apparatus. 14. Machine for cleaning surfaces according to one of paragraphs. 1-12, characterized in that it is made in the form of a manually operated apparatus having a handle-rod device (254), on which a cleaning head (212) is installed. 15. A machine for cleaning surfaces according to one of the preceding claims, characterized in that it contains a humidifying device, by means of which at least one cleaning roller assembly (216; 218; 344) and/or the surface to be cleaned (16; 224) is supplied cleaning liquid, and the humidifying device contains a reservoir device (34; 266; 354) for cleaning liquid. 16. A machine for cleaning surfaces according to claim 15, characterized in that it contains a flow area (122; 356) for cleaning liquid, through which passes the cleaning liquid coming from the reservoir device (34; 266; 354) for cleaning liquid when it supply to at least one cleaning roller assembly (18; 216; 218; 344) and/or to the surface to be cleaned (16; 224), moreover, a sensor device (126) is located near the flow area (122; 356), which determines the presence of the cleaning liquid in the flow area (122; 356). 17. A machine for cleaning surfaces according to claim 16, characterized in that the flow area (122; 356) is formed by a section of a tube or hose. 18. A machine for cleaning surfaces according to claim 16 or 17, characterized in that the flow area (122; 356) when using the machine for its intended purpose is located, in the direction (g) of gravity, under the reservoir device (34; 266; 354) for cleaning fluid. 19. Machine for cleaning surfaces according to one of paragraphs. 16-18, characterized in that the flow area (122) is located, in the direction of the cleaning liquid flow, behind the connector (120) for connecting the reservoir device (34) for cleaning liquid. 20. Machine for cleaning surfaces according to one of paragraphs. 16-19, characterized in that it contains a holder (32) on which a reservoir device (34) for cleaning liquid is installed. 21. Machine for cleaning surfaces according to claim 20, characterized in that the holder (32) has a connector (120) for connecting a reservoir device (34) for cleaning liquid. 22. Machine for cleaning surfaces according to claim 20 or 21, characterized in that the flow area is located at the holder (32). 23. Machine for cleaning surfaces according to one of paragraphs. 16-22, characterized in that the possibility of passing liquid through the flow area (122) is associated with the drive of at least one cleaning roller assembly (18) into rotation, and / or the flow area (122) is located, along the flow of the cleaning liquid, in front of the valve a device (38) for controlling the supply of cleaning fluid to at least one cleaning roller assembly (18) and/or to the surface to be cleaned (14). 24. Machine for cleaning surfaces according to one of paragraphs. 16-23, characterized in that the sensor device (126) is made in the form of a resistance measurement device. 25. Machine for cleaning surfaces according to one of paragraphs. 16-24, characterized in that the sensor device (126) is made in the form of an electrode device. 26. A machine for cleaning surfaces according to claim 25, characterized in that it provides for the supply of direct current or direct voltage to the electrode device. 27. A machine for cleaning surfaces according to claim 25 or 26, characterized in that the sensor device (126) comprises a first electrode (128) and a second electrode (130) located at a distance from it, the first electrode (128) and the second electrode ( 130) protrude into the flow area (122). 28. Surface cleaning machine according to claim 26 or 27, characterized in that the first electrode (128) and the second electrode (130) are fixed in the wall (132) of the flow region (122). 29. Machine for cleaning surfaces according to one of paragraphs. 26-28, characterized in that the first electrode (128) and/or the second electrode (130) are made in the form of metal rods. 30. Machine for cleaning surfaces according to one of paragraphs. 16-29, characterized in that the sensor device (126) makes it possible to determine whether the reservoir device (34; 266; 354) for cleaning liquid is empty, and the indication of emptying the reservoir device (34; 266; 354) for cleaning liquid is lack of cleaning fluid in the flow area (122; 356). 31. Machine for cleaning surfaces according to one of paragraphs. 16-30, characterized in that the sensor device (126) is connected by a signal transmission line to the data processing device (134) with the ability to implement at least one of the following functions: - the device (134) data processing on the basis of sensor data from the sensor device (126) determines the degree of filling of the reservoir device (34; 266; 354) for cleaning fluid; - the data processing device (134) controls the sensor device (126); - the data processing device (134) is connected by a signal transmission line to the indicator device (140) and/or to the transmitter (144); - the device (134) data processing initiates the issuance of a warning signal when it detects the emptying of the tank device (34; 266; 354) for cleaning fluid; - the data processing device (134) disables the rotary drive of at least one cleaning roller assembly (18) when it detects that the reservoir device (34; 266; 354) for cleaning liquid is empty. 32. Surface cleaning machine according to claim 31, characterized in that the indicator device (140) is located on the handle (26) used by the operator to guide the cleaning head (14) and/or is located on the cleaning head (342).

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