A fan assembly for a cleaning machine and the cleaning machine.

Abstract

This invention relates to a fan assembly for a cleaning machine and a cleaning machine. The fan assembly includes a guide vane housing, a motor, and a fan impeller housed within the guide vane housing. The fan impeller is mounted on a first output shaft. A diaphragm element is installed in the air collection chamber of an air pump. By driving the first output shaft of the motor to the fan impeller, normal airflow can be achieved, enabling the cleaning machine to have a negative pressure dust collection function. Simultaneously, the motor also has a second output shaft. By connecting the diaphragm element of the air collection assembly capable of pumping airflow within the air pump to the second output shaft, a single motor can simultaneously power the generation of two airflows, eliminating the need for a separate power unit and overcoming the problems of large size and high cost associated with additional motor installations.

Description

Technical Field

[0001] This invention belongs to the field of household washing and cleaning, and specifically relates to a fan assembly for a cleaning machine and a cleaning machine. Background Technology

[0002] A cleaning machine is a floor scrubber, vacuum cleaner, or sweeper. It sucks up a mixture of dust and moisture from the ground into its internal cavity to clean the floor.

[0003] Current floor scrubbers, such as the Chinese invention patent application "A Self-Cleaning System and Method for a Floor Scrubber," patent application number CN202210779415.8 (publication number CN115137265A), disclose a self-cleaning system for a floor scrubber. The cleaning section includes a protective shell, a roller brush, a scraper, a pusher plate, and a toothed box assembly. The roller brush is placed on one side of the protective shell, with both ends movably connected to the shell, allowing it to rotate relative to the shell. The scraper, pusher plate, and toothed box assembly are fixedly connected inside the protective shell via brackets. One side of the scraper presses down on the roller brush, and the toothed box assembly is movably connected to one end of the roller brush through an engagement mechanism. The pusher plate collects wastewater into a wastewater collection area. An air pump is also included, which uses negative pressure to draw the scraped wastewater into the wastewater tank through the inlet end of the wastewater pipe.

[0004] In the aforementioned patent, the air pump is mounted on the machine body. When working, an additional motor is required to drive the air pump. The additional motor increases the size and occupies more space; in addition, it increases the cost.

[0005] Therefore, further improvements are needed to the existing cleaning machines. Summary of the Invention

[0006] The first technical problem to be solved by the present invention is to provide a blower assembly for a cleaning machine that can enable the operation of an air pump without the need for an additional power source, in light of the current state of the prior art.

[0007] The second technical problem to be solved by the present invention is to provide a cleaning machine having the above-mentioned fan assembly that improves the ability to clean the ground.

[0008] The technical solution adopted by the present invention to solve the first technical problem mentioned above is: a fan assembly for a cleaning machine, comprising:

[0009] A fan has an air guide shell, a motor and a fan wheel. The motor and the fan wheel are both disposed inside the air guide shell. The output end of the motor has a first output shaft, and the fan wheel is mounted on the first output shaft so that it rotates relative to the air guide shell under the drive of the motor, thereby conveying airflow from the air inlet end of the fan to the air outlet end.

[0010] An air pump has an air collection chamber, an air inlet, and an air outlet for fluid communication with the air-using components in a cleaning machine, and the air collection chamber is provided with an air collection assembly for supplying air to the air outlet.

[0011] The gas collection assembly includes a diaphragm element that is movably arranged in the gas collection chamber to pump the airflow from the inlet end of the air pump to the outlet end of the air pump. The output end of the motor also has a second output shaft that is drively connected to the diaphragm element of the gas collection assembly.

[0012] To ensure that the power of the motor in the fan can not only drive the impeller but also directly drive the air pump to pump gas, preferably, the air pump is arranged above the fan and a transmission mechanism is provided between them. The power input end of the transmission mechanism is driven and connected to the second output shaft of the motor, and its power output end is driven and connected to the diaphragm element.

[0013] There are various ways to achieve pumping. Preferably, the air pump further includes a pump casing and a valve plate. The pump casing is hollow to form the air collecting chamber. The valve plate is located in the air collecting chamber and is arranged laterally above the diaphragm element, thereby dividing the air collecting chamber into an inlet chamber connected to the inlet and an outlet chamber connected to the outlet. Along the pumping direction of the airflow, both sides of the diaphragm element can be close to or far away from the valve plate, so as to increase the volume of the inlet chamber and decrease the volume of the outlet chamber, thereby drawing the airflow from the inlet into the inlet chamber; or correspondingly decreasing the volume of the inlet chamber and increasing the volume of the outlet chamber, thereby squeezing the airflow in the inlet chamber into the outlet chamber.

[0014] Specifically, the diaphragm element is arranged to deflect and swing relative to the gas collection chamber, and the extension direction of its swing axis is at an angle to the vertical direction, so that one side of its deflection direction is close to the valve plate, while the other side is away from the valve plate.

[0015] To enable the deflection and oscillation of the diaphragm element, the gas collection assembly preferably includes a rotating seat and a connecting rod, wherein the rotating seat is rotatably constrained at the bottom of the gas collection chamber, the upper end of the connecting rod is connected to the bottom of the diaphragm element, the lower end is connected to the rotating seat, and the connecting rod is arranged inclined from top to bottom.

[0016] Specifically, the diaphragm element includes at least two diaphragms that can elastically stretch and contract in the vertical direction. Under the deflection and oscillation of the diaphragm element, each diaphragm is alternately located in the inlet chamber or the outlet chamber.

[0017] Preferably, there are four diaphragms, which are arranged at intervals in the circumferential direction of the diaphragm element.

[0018] There are various ways to achieve power transmission. Preferably, the transmission mechanism includes a transmission box, a first transmission wheel, and a second transmission wheel. The first and second transmission wheels are both disposed in the transmission box and are driven and cooperate with each other. The transmission box also has a first transmission shaft passing through the first transmission wheel and a second transmission shaft passing through the second transmission wheel. The rotation axes of the first and second transmission shafts are both vertically extended. The upper end of the first transmission shaft extends to the transmission box and is connected to the bottom of the rotating base. The second output shaft of the motor is driven and connected to the second transmission wheel.

[0019] Specifically, the second output shaft of the motor extends into the transmission box and is connected to the bottom of the second transmission wheel, and the second transmission shaft is coaxially arranged with the second output shaft of the motor.

[0020] There are several ways to achieve transmission between two transmission wheels. Preferably, both the first and second transmission wheels are gears, and both have teeth on their outer walls. The teeth on the periphery of the first and second transmission wheels can mesh with each other.

[0021] Preferably, the air guide shell has a flow channel inside, and the air collection chamber of the air pump is in fluid communication with the flow channel. The air source of the air pump can be directly drawn from the outside, but it is preferred to draw air from the flow channel inside the air guide shell. In this way, not only can the air volume output by the air guide shell be shared, greatly reducing the noise and vibration of the fan exhaust, but the initial velocity of the airflow itself can also compensate for the pumping power of the airflow when the air pump power is insufficient.

[0022] Specifically, the air guide shell also has an inner shell, and the motor and impeller are both located inside the inner shell, thereby forming an air inlet channel that is fluidly connected to the air inlet end of the air guide shell inside the inner shell. A gap is left between the inner shell and the air guide shell to form an exhaust channel that is fluidly connected to the air outlet end of the air guide shell. Along the direction of fluid flow, the exhaust channel is arranged downstream of the air inlet channel, and the two are connected to form the flow channel. The inner shell also has an air outlet for the air inlet channel and the exhaust channel to communicate.

[0023] The air pump's air collection chamber can be directly connected to the air guide shell through a pipe, but this would increase the internal structure of the fan and interfere with the airflow. Preferably, the transmission box is hollow to form a cavity, and the exhaust channel is connected to the air collection chamber in fluid order through the cavity and the air pump's air inlet. In this way, the transmission box can not only accommodate the power transmission components but also guide the airflow, achieving two goals at once.

[0024] Specifically, the transmission box has a first port and a second port on its upper and lower end walls, respectively, and a third port is provided on the top wall of the air guide shell. The second port is sealed and connected to the third port, so that the exhaust channel is in communication with the cavity. The first port is connected to the air inlet of the air pump.

[0025] Preferably, the first port and the air inlet of the air pump are connected by an air guide pipe.

[0026] To further solve the second technical problem mentioned above, the technical solution adopted by the present invention is as follows: a cleaning machine having the above-mentioned fan assembly, and further including a floor brush module and a dust separation module, wherein the floor brush module, the dust separation module and the fan are arranged sequentially along the flow direction of the fluid.

[0027] Preferably, the cleaning machine is a floor scrubber.

[0028] Compared with the prior art, the advantages of the present invention are as follows: In the fan assembly for the cleaning machine, by connecting the first output shaft of the motor to the impeller drive of the fan, the normal air guiding of the fan can be realized, enabling the cleaning machine to have a negative pressure dust suction function. At the same time, the motor also has a second output shaft. By connecting the diaphragm element of the air collection component that enables airflow pumping in the air pump to the second output shaft, one motor can simultaneously supply power to generate two airflows, eliminating the need for a separate power unit and overcoming the problems of large volume and high cost caused by additional motor installation. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the wind turbine assembly in this embodiment of the invention;

[0030] Figure 2 for Figure 1 A sectional view;

[0031] Figure 3 for Figure 1 Partial structural diagram;

[0032] Figure 4 for Figure 1 A diagram showing the dissection from another angle after omitting part of the structure;

[0033] Figure 5 This is a schematic diagram of the overall structure of the cleaning machine in this embodiment. Detailed Implementation

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0035] like Figures 1 to 5As shown, this is a preferred embodiment of the present invention. In this embodiment, the fan assembly for the cleaning machine includes a fan 1 and an air pump 2. For conventional cleaning machines, a fan 1 is typically used to create negative pressure. Taking a floor scrubber as an example, the cleaning machine usually also includes a floor brush module 4 and a dust separation module 6, with the floor brush module 4, dust separation module 6, and fan 1 arranged sequentially along the fluid flow direction. For some special cleaning machines, additional air-using components are often included for additional functions, such as atomizing the water at the end, and the air pump 2 is used to supply air to these air-using components.

[0036] To achieve the air guiding function, the aforementioned fan 1 has an air guiding housing 14, a motor 11, and an impeller 12, both of which are housed within the air guiding housing 14. The motor 11 has a first output shaft 111 at its output end, and the impeller 12 is mounted on this first output shaft 111. Driven by the motor 11, the impeller 12 rotates relative to the air guiding housing 14, thereby conveying airflow from the air inlet to the air outlet of the fan 1. The negative pressure of the entire cleaning machine is achieved by the motor 11 driving the impeller 12 to rotate. Specifically, in this embodiment, the air guide shell 14 also has an inner shell 13. The motor 11 and the impeller 12 mentioned above are both located inside the inner shell 13, thereby forming an air inlet channel 101 that is fluidly connected to the air inlet end of the air guide shell 14 inside the inner shell 13. A gap is left between the inner shell 13 and the air guide shell 14 to form an exhaust channel 102 that is fluidly connected to the exhaust end of the air guide shell 14. Along the flow direction of the fluid, the exhaust channel 102 is arranged downstream of the air inlet channel 101, and the two are connected to form a flow channel 10. An air outlet is also provided on the inner shell 13 for the air inlet channel 101 and the exhaust channel 102 to communicate.

[0037] In order to supply air to the air-using components inside the cleaning machine, the air pump 2 in this embodiment has an air collection chamber 2a, an air inlet 202, and an air outlet 201 for fluid communication with the air-using components in the cleaning machine. The air collection chamber 2a is provided with an air collection assembly 22 for supplying air to the air outlet 201. The air collection assembly 22 includes a diaphragm element 221, which is movably arranged in the air collection chamber 2a, thereby pumping the airflow from the air inlet end of the air pump 2 to the air outlet end of the air pump 2. Of course, there are various air pumps 2 in the prior art that can use diaphragm element 221 to pump airflow. The present invention adopts a pumping structure in which diaphragm element 221 and valve plate 2b cooperate with each other. That is, the air pump 2 mentioned above also includes pump housing 20 and valve plate 2b. The pump housing 20 is hollow to form an air collecting chamber 2a. Valve plate 2b is disposed in air collecting chamber 2a and arranged laterally above diaphragm element 221, thereby dividing air collecting chamber 2a into an air inlet chamber connected to air inlet 202 and an air outlet chamber connected to air outlet 201. Along the pumping direction of airflow, both sides of diaphragm element 221 can be close to or far away from valve plate 2b, so as to increase the volume of air inlet chamber and decrease the volume of air outlet chamber, thereby drawing airflow from air inlet 202 into air inlet chamber; or decrease the volume of air inlet chamber and increase the volume of air outlet chamber, thereby squeezing airflow in air inlet chamber into air outlet chamber.

[0038] To change the volume of the inlet and outlet chambers within the gas collecting chamber 2a, the diaphragm element 221 is arranged to deflect and swing relative to the gas collecting chamber 2a, with its swing axis extending at an angle to the vertical direction. This causes one side of its deflection direction to be closer to the valve plate 2b, while the other side is farther away from the valve plate 2b. Specifically, the gas collecting assembly 22 also includes a rotating seat 222 and a connecting rod 223. The rotating seat 222 is rotatably constrained at the bottom of the gas collecting chamber 2a. The upper end of the connecting rod 223 is connected to the bottom of the diaphragm element, and the lower end is connected to the rotating seat 222. The connecting rod 223 is arranged inclined from top to bottom. The diaphragm element 221 includes at least two diaphragms 224 that can elastically extend and retract vertically. Under the deflection and swing of the diaphragm element 221, each diaphragm 224 is alternately located in the inlet or outlet chamber. In this embodiment, there are four diaphragms 224, which are spaced apart in the circumferential direction of the diaphragm element 221. Except for the linkage with the second output shaft of the motor 11, the internal structure of the air pump 2 is basically similar to the principle of the micro diaphragm pump in the prior art. For a more detailed airflow pushing process, please refer to the authorized patents such as CN209875436U and CN213540663U, which will not be elaborated here.

[0039] Of course, the power source for the air pump 2 could be a separate driver, but this would require additional internal space for the fan 1, increasing costs and potentially affecting airflow delivery. Furthermore, controlling the driver would require a separate control system. Therefore, in this embodiment, the output end of the motor 11 also has a second output shaft 112, which is connected to the diaphragm element 221 of the air collection assembly 22.

[0040] There are various ways to achieve linkage between the second output shaft 112 of the motor 11 and the diaphragm element 221 of the air collection assembly 22. In this embodiment, the air pump 2 is arranged above the fan 1, and a transmission mechanism 3 is also provided between the two. The power input end of the transmission mechanism 3 is driven and connected to the second output shaft 112 of the motor 11, and its power output end is driven and connected to the diaphragm element 221. Specifically, the transmission mechanism 3 includes a transmission box 31, a first transmission wheel 32, and a second transmission wheel 33. The first transmission wheel 32 and the second transmission wheel 33 are both arranged in the transmission box 31 and are driven and cooperated. The transmission box 31 also has a first transmission shaft 34 passing through the first transmission wheel 32 and a second transmission shaft 35 passing through the second transmission wheel 33. The rotation axes of the first transmission shaft 34 and the second transmission shaft 35 both extend vertically. In order to realize the power transmission, the upper end of the first transmission shaft 34 extends to the transmission box 31 and is connected to the bottom of the rotating seat 222. The second output shaft 112 of the motor 11 is driven and connected to the second transmission wheel 33. Furthermore, the second output shaft 112 of the aforementioned motor 11 extends into the transmission box 31 and is connected to the bottom of the second transmission wheel 33. The second transmission shaft 35 is coaxially arranged with the second output shaft 112 of the motor 11. In this embodiment, both the first transmission wheel 32 and the second transmission wheel 33 are gears, and both have teeth on their outer walls. The two teeth can mesh with each other, thereby connecting the first transmission wheel 32 and the second transmission wheel 33. Thus, by setting the first transmission wheel 32 and the second transmission wheel 33 in the transmission box 31 of the transmission mechanism 3, the speed adjustment of the deflection and oscillation of the impeller 12 and the diaphragm element 221 can be achieved by changing the size of the two transmission wheels or their transmission ratio. That is, there is no need to set up a special drive program, and the pumping volume achieved by the deflection and oscillation of the diaphragm element 221 can be adaptively changed according to the change of the power of the fan 1.

[0041] The air pump 2 can draw air directly from the outside, but in this embodiment, a flow channel 10 is provided inside the air guide shell 14, and the air collection chamber 2a of the air pump 2 is fluidly connected to the flow channel 10. This airflow connection design allows the air pump 2 to not only share the airflow output from the air guide shell 14, greatly reducing the noise and vibration generated by the fan 1 during exhaust, but also to compensate for insufficient pumping power of the airflow when the air pump 2's delivery power is insufficient, thanks to the initial velocity of the airflow itself. Specifically, the airflow is transported through the transmission box 31, which, in addition to assembling the power transmission components, also serves to guide the airflow. A cavity 30 is formed inside the transmission box 31, and the exhaust channel 102 is fluidly connected to the air collection chamber 2a via the cavity 30 and the air inlet 202 of the air pump 2. Specifically, the transmission box 31 has a first port 3a and a second port 3b on its upper and lower end walls, respectively, and a third port 3c on the top wall of the air guide shell 14. The second port 3b is sealed to the third port 3c, thereby allowing the exhaust channel 102 to flow through the cavity 30. The first port 3a is connected to the air inlet 202 of the air pump 2. The first port 3a and the air inlet 202 of the air pump 2 are connected by an air guide pipe 5.

[0042] The term "fluid connectivity" as used in this invention refers to the spatial relationship between two components or parts (hereinafter referred to as the first part and the second part, respectively), that is, a fluid (gas, liquid, or a mixture of both) can flow from the first part along a flow path and / or be transported to the second part. This can be a direct connection between the first part and the second part, or an indirect connection between the first part and the second part through at least one third party. This third party can be a fluid channel such as a pipe, channel, conduit, guide, hole, or groove, or a chamber or combination thereof that allows fluid to flow through.

[0043] Furthermore, the specification and claims of this invention use terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," to describe various exemplary structural parts and elements of the invention. However, these terms are used herein merely for ease of explanation and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this invention can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A fan assembly for a cleaning machine, comprising: A fan (1) has an air guide shell (14), a motor (11), and a fan wheel (12), wherein the motor (11) and the fan wheel (12) are both disposed inside the air guide shell (14). The output end of the motor (11) has a first output shaft (111), and the impeller (12) is mounted on the first output shaft (111) to rotate relative to the air guide shell (14) under the drive of the motor (11), thereby conveying the airflow from the air inlet end of the fan (1) to the air outlet end. The air pump (2) has an air collection chamber (2a), an air inlet (202) and an air outlet (201) for fluid communication with the air-using components in the cleaning machine, and the air collection chamber (2a) is provided with an air collection assembly (22) for supplying air to the air outlet (201). Its features are: The gas collection assembly (22) includes a diaphragm element (221) which is movably arranged in the gas collection chamber (2a) to pump the airflow from the inlet end of the air pump (2) to the outlet end of the air pump (2). The output end of the motor (11) also has a second output shaft (112), which is connected to the diaphragm element (221) of the gas collection assembly (22). The air guide shell (14) has a flow channel (10) inside, and the air collection chamber (2a) of the air pump (2) is in fluid communication with the flow channel (10); The air guide shell (14) also has an inner shell (13) inside. The motor (11) and the impeller (12) are both located inside the inner shell (13), thereby forming an air inlet channel (101) that is fluidly connected to the air inlet end of the air guide shell (14) inside the inner shell (13). A gap is left between the inner shell (13) and the air guide shell (14) to form an exhaust channel (102) that is fluidly connected to the exhaust end of the air guide shell (14). Along the flow direction of the fluid, the exhaust channel (102) is arranged downstream of the air inlet channel (101), and the two are connected to form the flow channel (10). The inner shell (13) also has an air outlet for the air inlet channel (101) and the exhaust channel (102) to communicate. The air pump (2) is arranged above the fan (1) and a transmission mechanism (3) is provided between them. The transmission mechanism (3) includes a transmission box (31). The transmission box (31) is hollow inside to form a cavity (30). The exhaust channel (102) is in fluid communication with the air collection chamber (2a) through the cavity (30) and the air inlet (202) of the air pump (2) in sequence. The transmission box (31) has a first port (3a) and a second port (3b) on its upper and lower end walls respectively, and the air guide shell (14) has a third port (3c) on its top wall plate. The second port (3b) is sealed to the third port (3c), so that the exhaust channel (102) is in communication with the cavity (30); the first port (3a) is connected to the air inlet (202) of the air pump (2); The first port (3a) and the air inlet (202) of the air pump (2) are connected by an air guide pipe (5).

2. The wind turbine assembly according to claim 1, characterized in that: The power input end of the transmission mechanism (3) is driven and connected to the second output shaft (112) of the motor (11), and its power output end is driven and connected to the diaphragm element (221).

3. The wind turbine assembly according to claim 2, characterized in that: The air pump (2) further includes a pump housing (20) and a valve plate (2b). The pump housing (20) is hollow inside to form the air collecting chamber (2a). The valve plate (2b) is located in the air collecting chamber (2a) and is arranged laterally above the diaphragm element (221). This divides the air collecting chamber (2a) into an air inlet chamber that communicates with the air inlet (202) and an air outlet chamber that communicates with the air outlet (201). Along the pumping direction of the airflow, both sides of the diaphragm element (221) can be close to or away from the valve plate (2b) to increase the volume of the air inlet chamber and decrease the volume of the air outlet chamber, thereby drawing the airflow from the air inlet (202) into the air inlet chamber; or decrease the volume of the air inlet chamber and increase the volume of the air outlet chamber, thereby squeezing the airflow in the air inlet chamber into the air outlet chamber.

4. The wind turbine assembly according to claim 3, characterized in that: The diaphragm element (221) is arranged to deflect and swing relative to the gas collection chamber (2a), and the extension direction of its swing axis is at an angle to the vertical direction, so that one side of its deflection direction is close to the valve plate (2b), while the other side is away from the valve plate (2b).

5. The wind turbine assembly according to claim 4, characterized in that: The gas collection assembly (22) also includes a rotating seat (222) and a connecting rod (223), wherein the rotating seat (222) is rotatably constrained at the bottom of the gas collection chamber (2a), the upper end of the connecting rod (223) is connected to the bottom of the diaphragm element, the lower end is connected to the rotating seat (222), and the connecting rod (223) is arranged inclined from top to bottom.

6. The wind turbine assembly according to claim 5, characterized in that: The diaphragm element (221) includes at least two diaphragms (224) that can elastically stretch and contract in the vertical direction. Under the deflection and swing of the diaphragm element (221), each of the diaphragms (224) is alternately located in the air inlet chamber or the air outlet chamber.

7. The wind turbine assembly according to claim 6, characterized in that: There are four diaphragms (224), which are spaced apart in the circumferential direction of the diaphragm element (221).

8. The wind turbine assembly according to claim 7, characterized in that: The transmission mechanism (3) further includes a first transmission wheel (32) and a second transmission wheel (33). The first transmission wheel (32) and the second transmission wheel (33) are both disposed in the transmission box (31) and are driven together. The transmission box (31) also has a first transmission shaft (34) passing through the first transmission wheel (32) and a second transmission shaft (35) passing through the second transmission wheel (33). The rotation axes of the first transmission shaft (34) and the second transmission shaft (35) extend vertically. The upper end of the first transmission shaft (34) extends to the transmission box (31) and is connected to the bottom of the rotating seat (222). The second output shaft (112) of the motor (11) is drivenly connected to the second transmission wheel (33).

9. The wind turbine assembly according to claim 8, characterized in that: The second output shaft (112) of the motor (11) extends into the transmission box (31) and is connected to the bottom of the second transmission wheel (33). The second transmission shaft (35) is coaxially arranged with the second output shaft (112) of the motor (11).

10. The wind turbine assembly according to claim 9, characterized in that: Both the first transmission wheel (32) and the second transmission wheel (33) are gears, and both have teeth on their outer walls. The teeth on the periphery of the first transmission wheel (32) and the second transmission wheel (33) can mesh with each other.

11. A cleaning machine comprising a fan assembly as described in any one of claims 1 to 10, characterized in that, It also includes a floor brush module (4) and a dust separation module (6), wherein the floor brush module (4), the dust separation module (6) and the fan (1) are arranged in sequence along the flow direction of the fluid.

12. The cleaning machine according to claim 11, characterized in that: The cleaning machine is a floor scrubber.

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