Disc brush with self-cleaning function for cleaning machine, floor brush module and cleaning machine

Abstract

The invention relates to a disc brush with a self-cleaning function for a cleaning machine, a floor brush module and the cleaning machine, the disc brush is internally provided with an airflow channel, a water retaining ring and a pumping drum device, in a self-cleaning mode, in the state that the pumping drum device pumps air into a water flowing space through the airflow channel, negative pressure is formed in the water flowing space, and the water flowing space is sealed. When the water inlet is opened and the water outlet is closed, external water enters the water flowing space through the water inlet, and the pumping device blows air into the water flowing space through the air flow channel, the pressure in the water flowing space is larger than the atmospheric pressure, the water inlet is closed and the water outlet is opened, and the water in the water flowing space is discharged outwards through the water outlet. In this way, the bottom of the brush head, especially the center of the bottom of the brush head, can be cleaned through inflow and outflow of water. Compared with the prior art, the disc brush does not need to rotate during self-cleaning, so that rotation noise can be thoroughly avoided, the middle of the bottom of the brush head can be thoroughly cleaned, and the cleaning effect is improved.

Description

Technical Field

[0001] This invention relates to the field of household cleaning equipment, and more particularly to a self-cleaning disc brush, floor brush module, and cleaning machine. Background Technology

[0002] Most existing mobile cleaning equipment (such as floor scrubbers) uses roller brushes as the brushing actuating component. The roller brush rolls, causing its outer brush parts or bristles to contact the surface to be cleaned, thus removing dirt. While the roller brush structure provides relatively large cleaning coverage, the reliance on negative pressure suction for dirt collection in mobile cleaning equipment means that the roller brush arrangement can obstruct airflow, weakening the negative pressure suction to some extent.

[0003] To address the aforementioned issues, Chinese utility model patent CN202122959279.4 (authorization announcement number CN216776859U) discloses "A floor brush module for a cleaning machine and a cleaning machine". This cleaning machine uses a disc brush structure instead of a traditional roller brush. Since the rotation axis of the disc brush extends vertically, there is a rotation gap between two adjacent disc brushes. This gap is just right for airflow to pass through, which greatly solves the problem of weakened negative pressure suction in existing cleaning machines.

[0004] Furthermore, after cleaning, dirt remains at the bottom of the disc brush and needs to be cleaned. Existing cleaning machines use a self-cleaning mechanism where the disc brush rotates to release water accumulated at its bottom, using this water to clean the brush. This leads to the following problems:

[0005] (1) Using water that accumulates during rotation to clean the brush will result in the edges being able to be cleaned due to the high linear speed, while the center will not be able to clean the dirt on the surface of the brush due to the low linear speed or even none, thus affecting the cleaning effect of the brush.

[0006] (2) The machine is quite noisy when the disc brush rotates, which leads to loud noise during self-cleaning and affects the user experience. Summary of the Invention

[0007] The first technical problem to be solved by the present invention is to provide a self-cleaning disc brush for cleaning machines that can achieve self-cleaning without rotation and has a good cleaning effect, in contrast to the prior art.

[0008] The second technical problem to be solved by the present invention is to provide a floor brush module for a cleaning machine having the above-mentioned disc brush, in contrast to the prior art.

[0009] The third technical problem to be solved by the present invention is to provide a cleaning machine having the above-mentioned floor brush module, in contrast to the prior art.

[0010] The technical solution adopted by the present invention to solve the first technical problem mentioned above is: a disc brush with self-cleaning function for a cleaning machine, comprising:

[0011] The brush head is used to sweep and scrub the surface to be cleaned.

[0012] A rotating shaft extends vertically and can rotate around its axis, with its lower end connected to the aforementioned brush head;

[0013] Its characteristic is that it further includes:

[0014] An airflow channel is vertically installed in the aforementioned rotating shaft, including an upper airflow inlet at the top and a lower airflow inlet at the bottom;

[0015] A water-blocking ring is circumferentially arranged around the bottom of the brush head with the straight line of the aforementioned rotating shaft as the center. When the cleaning machine is in use, it forms a water flow space with the bottom wall of the brush head and the surface to be swept and cleaned, and is provided with an openable and closable water inlet and outlet.

[0016] The vent is vertically located at the center of the brush head and within the water flow space.

[0017] A drum-drawing device is mounted on the aforementioned rotating shaft and has an air guide port that is in fluid communication with the aforementioned upward airflow port.

[0018] Furthermore, in self-cleaning mode, when the aforementioned suction device is drawing air into the aforementioned water flow space through the aforementioned airflow channel, the aforementioned water inlet is open and the water outlet is closed; and when the aforementioned suction device is blowing air into the aforementioned water flow space through the aforementioned airflow channel, the aforementioned water inlet is closed and the water outlet is open.

[0019] Furthermore, there are at least two water inlets spaced circumferentially on the aforementioned water-blocking ring, and there are also at least two water outlets spaced circumferentially on the aforementioned water-blocking ring, with each water inlet and outlet spaced apart. This ensures that the entire outer surface of the brush head is thoroughly cleaned through the inflow and outflow of water, avoiding cleaning dead spots and guaranteeing effective cleaning.

[0020] Furthermore, the water-retaining ring is made of soft rubber, and it has an upward-opening U-shaped groove, within which a baffle is formed. The bottom of the brush head has a vertically protruding U-shaped baffle, which corresponds to the U-shaped groove and is positioned directly opposite it. The baffle can cover the U-shaped groove and abut against the edge of the baffle along its length.

[0021] The aforementioned inlet and outlet are each formed by the aforementioned U-shaped groove. The baffle corresponding to the inlet is located outside the water-blocking ring, while the baffle corresponding to the outlet is located inside the water-blocking ring. Thus, when the pumping device draws air into the water flow space, a negative pressure is created inside the water flow space. At this time, the baffle at the inlet flips inward under the negative pressure, opening the inlet. The baffle at the outlet, however, cannot flip inward due to the obstruction of its corresponding baffle, thus keeping the outlet closed. Conversely, when the pumping device blows air into the water flow space, the internal pressure of the air in the water flow is greater than the external atmospheric pressure. At this time, the baffle at the outlet flips outward under the positive pressure, opening the outlet. The baffle at the inlet, however, cannot discharge air due to the obstruction of its corresponding baffle, thus keeping the inlet closed. Therefore, this invention, through the design of the water-blocking ring, enables the pumping device to simultaneously increase the positive and negative pressure for the water flow space while simultaneously opening and closing the inlet and outlet.

[0022] Furthermore, the water-retaining ring is detachably mounted on the brush head, thereby facilitating the assembly and disassembly of the water-retaining ring and the brush head.

[0023] Furthermore, the water-retaining ring is made of soft rubber, and it is equipped with scraper strips spaced circumferentially along its upper edge. Each scraper strip extends radially along the water-retaining ring and is centered on the aforementioned vent. The lowest point of each scraper strip is higher than or flush with the bottom edge of the water-retaining ring, and the upper end of each scraper strip extends upward along its length to form an insert. The brush head has slots that correspond one-to-one with each insert for insertion. This design allows for detachable installation of the water-retaining ring and the brush head, and also enables better cleaning of the surface to be cleaned through the water-retaining ring and the brush strips.

[0024] Furthermore, the suction device includes a cylindrical base that rotates synchronously with the aforementioned rotating shaft and a flexible diaphragm. The diaphragm is circumferentially connected to the upper port of the base, and the two together form a suction space. The middle part of the diaphragm can bulge or collapse relative to the bottom wall of the base. Thus, when the diaphragm bulges, air in the flow space is drawn into the suction space, creating a negative pressure. When the diaphragm collapses, gas in the suction space is forced into the flow space, making the air pressure inside the flow space greater than atmospheric pressure, thus creating a positive pressure.

[0025] Furthermore, the drum-pulling device also includes a push-pull mechanism for pushing and pulling the diaphragm. This facilitates the upward or downward movement of the diaphragm relative to the bottom wall of the base.

[0026] Furthermore, the push-pull mechanism includes a drive motor, a lifting sleeve, a bearing, and a connecting block arranged sequentially from top to bottom along the linear direction of the rotation axis. The output shaft of the drive motor passes through the lifting sleeve, forming a helical transmission pair. The bottom of the connecting block is fixed to the center of the diaphragm, while its top has a cylindrical mounting post. The bearing is sleeved on the mounting post, and the connecting block is connected to the lower end of the lifting sleeve via the bearing. Thus, when the drive motor rotates forward, it causes the lifting sleeve to move upward, thereby pulling the diaphragm upward relative to the bottom wall of the base. When the drive motor rotates in reverse, it causes the lifting sleeve to move downward, thereby pushing the diaphragm downward relative to the bottom wall of the base. The bearing is used to prevent the lifting sleeve from rotating with the connecting block.

[0027] Furthermore, the lower end of the lifting sleeve is provided with a downward-facing, annular groove centered on its own axis, in which the bearing is housed. This ensures a secure installation of the bearing.

[0028] Furthermore, the vent of the base extends vertically downwards along the circumference to form a vent connector. This vent connector is inserted into the upper airflow port of the rotating shaft, and a first sealing ring is fitted onto the vent connector. This first sealing ring is circumferentially sandwiched between the top edge of the rotating shaft and the outer bottom surface of the base. This prevents air leakage at the connection between the vent of the base and the upper airflow port of the rotating shaft, thus better ensuring the negative pressure state of the water flow space.

[0029] Furthermore, the vent of the brush head extends vertically upward along the circumferential direction to form a vent connector. The lower end of the rotating shaft is inserted into this vent connector, and a horizontally extending limiting perimeter is protruding along the circumferential direction on the outer surface of the lower end of the rotating shaft. A second sealing ring is circumferentially sandwiched between the limiting perimeter and the top edge of the vent connector. This prevents air leakage at the connection between the downward airflow port of the rotating shaft and the vent of the brush head, thus better ensuring the negative pressure state of the water flow space.

[0030] The technical solution adopted to further solve the second technical problem mentioned above is as follows: a floor brush module for a cleaning machine, including a housing, the housing having an air guide channel inside, and the housing having a dust suction port on the front side of the cleaning machine in the direction of travel, the housing also having an exhaust port, the air guide channel being arranged between the dust suction port and the exhaust port along the direction of fluid flow, characterized in that it further includes a disc brush with a self-cleaning function for the cleaning machine as described above, the brush head of the disc brush being rotatably disposed at the dust suction port of the upper housing.

[0031] The technical solution adopted to further solve the third technical problem mentioned above is: a cleaning machine, characterized in that it includes a floor brush module for the cleaning machine as described above.

[0032] Compared with existing technologies, the advantages of this invention are as follows: It is equipped with an airflow channel, a water-blocking ring, and a suction device. In self-cleaning mode, when the suction device draws air into the water flow space through the airflow channel, a negative pressure is created inside the water flow space. The inlet is open while the outlet is closed, allowing external water to enter the water flow space through the inlet. Conversely, when the suction device blows air into the water flow space through the airflow channel, the pressure inside the water flow space is greater than atmospheric pressure. The inlet is closed while the outlet is open, allowing water in the water flow space to be discharged outwards through the outlet. This water inflow and outflow effectively cleans the bottom of the brush head, especially the center of the brush head. Compared with existing technologies, the disc brush of this invention does not need to rotate during self-cleaning, thus completely avoiding rotational noise and thoroughly cleaning the center of the brush head bottom, improving the cleaning effect. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of the floor brush in an embodiment of the present invention;

[0034] Figure 2 for Figure 1 A structural diagram from another direction;

[0035] Figure 3 This is a cross-sectional view of the floor brush in an embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram of the structure of the brush head and water-retaining ring in an embodiment of the present invention;

[0037] Figure 5 for Figure 4 A structural diagram from another direction;

[0038] Figure 6 This is a schematic diagram of the brush head structure in an embodiment of the invention;

[0039] Figure 7 This is a schematic diagram of the water-blocking ring in an embodiment of the present invention. Detailed Implementation

[0040] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0041] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this invention can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0042] like Figures 1-7 As shown, a cleaning machine includes a floor brush module. The floor brush module includes a housing 1 with an internal air guide channel (not shown). The housing 1 has a suction port 11 on its front side in the direction of travel, and an exhaust port 12. The air guide channel is arranged between the suction port 11 and the exhaust port 12 along the fluid flow direction. Further, it includes a disc brush 2, the brush head 21 of which is rotatably mounted at the suction port 11 of the upper housing 1. In this embodiment, the cleaning machine is specifically a floor scrubber. Multiple suction ports 11 are arranged side-by-side at intervals on the front side of the housing 1, and each suction port 11 is equipped with a disc brush 2. The specific structure of the disc brush 2 in this invention will be described below using a single disc brush 2 as an example.

[0043] Furthermore, the aforementioned disc brush 2 includes a brush head 21, a rotating shaft 22, an airflow channel 220, an air vent 211, and a drum-drawing device 4. The brush head 21 is used to sweep the surface 10 to be cleaned; the rotating shaft 22 extends vertically and can rotate around its axis, with its lower end connected to the brush head 21; the airflow channel 220 is vertically disposed within the rotating shaft 22, including an upper airflow vent 2201 at the upper end and a lower airflow vent 2202 at the lower end; and a water-blocking ring 3 is circumferentially arranged around the bottom of the brush head 21 with the rotating shaft 22 as its center. When the cleaning machine is in use, the bottom wall of the brush head 21 and the surface 10 to be swept and cleaned form a water flow space 30, with an openable and closable water inlet 3a and water outlet 3b respectively. An air vent 211 is vertically positioned at the center of the brush head 21 and located within the water flow space 30. A suction device 4 is mounted on the rotating shaft 22 and has an air guide port 411 that is fluidly connected to the upward airflow port 2201. Furthermore, in self-cleaning mode, when the suction device 4 is drawing air into the water flow space 30 through the airflow channel 220, the water inlet 3a is open and the water outlet 3b is closed; conversely, when the suction device 4 is blowing air into the water flow space 30 through the airflow channel 220, the water inlet 3a is closed and the water outlet 3b is open.

[0044] As can be seen from the above, the disc brush 2 of the present invention is provided with an airflow channel 220, a water-blocking ring 3, and a suction device 4. In self-cleaning mode, when the suction device 4 is drawing air into the water flow space 30 through the airflow channel 220, a negative pressure is formed inside the water flow space 30. The inlet 3a is open and the outlet 3b is closed, allowing external water to enter the water flow space 30 through the inlet 3a. When the suction device 4 is blowing air into the water flow space 30 through the airflow channel 220, the pressure inside the water flow space 30 is greater than atmospheric pressure. The inlet 3a is closed and the outlet 3b is open, allowing water in the water flow space 30 to be discharged outward through the outlet 3b. In this way, the bottom of the brush head 21, especially the center of the bottom of the brush head 21, can be cleaned through the inflow and outflow of water. Compared with the prior art, the disc brush 2 of the present invention does not need to rotate during self-cleaning, thus completely avoiding rotational noise and thoroughly cleaning the center of the bottom of the brush head 21, improving the cleaning effect.

[0045] Preferably, there are at least two water inlets 3a, spaced circumferentially on the water-blocking ring 3, and at least two water outlets 3b, also spaced circumferentially on the water-blocking ring 3, with each water inlet 3a and each water outlet 3b spaced apart. This ensures that the entire outer bottom surface of the brush head 21 is thoroughly cleaned through the inflow and outflow of water, avoiding cleaning dead spots and guaranteeing cleaning effectiveness. Specifically, in this embodiment, there are two water inlets 3a and two water outlets 3b.

[0046] Furthermore, the aforementioned water-retaining ring 3 is made of soft rubber, and a U-shaped groove 31 with an upward opening is formed on the water-retaining ring 3, and a baffle 311 is formed in the U-shaped groove 31. The bottom of the aforementioned brush head 21 has a U-shaped baffle 32 protruding vertically. The baffle 32 corresponds to the aforementioned U-shaped groove 31 and the two are arranged facing each other inside and out. Moreover, the baffle 32 can cover the U-shaped groove 31 and can abut against the edge of the baffle 311 along the length direction. Each water inlet 3a and each water outlet 3b is respectively formed by the aforementioned U-shaped groove 31, wherein the baffle 32 corresponding to each water inlet 3a is located outside the water-retaining ring 3, and the baffle 32 corresponding to each water outlet 3b is located inside the water-retaining ring 3. When the suction device 4 draws air into the water flow space 30, a negative pressure is created inside the water flow space 30. At this time, the baffle 311 at the inlet 3a flips inward under the negative pressure, opening the inlet 3a. However, the baffle 311 at the outlet 3b cannot flip inward due to the obstruction of the corresponding baffle 32, thus keeping the outlet 3b closed. Conversely, when the suction device 4 blows air into the water flow space 30, the internal pressure of the air in the water flow is greater than the external atmospheric pressure. At this time, the baffle 311 at the outlet 3b flips outward under the positive pressure, opening the outlet 3b. However, the baffle 311 at the inlet 3a cannot discharge air due to the obstruction of the corresponding baffle 32, thus keeping the inlet 3a closed. Therefore, this invention, through the special design of the baffle ring 3, enables the suction device 4 to simultaneously increase the positive and negative pressure for the water flow in and out of the water flow space 30 while simultaneously opening and closing the inlet 3a and outlet 3b.

[0047] Furthermore, preferably, the water-retaining ring 3 is detachably mounted on the brush head 21, thereby facilitating the assembly and disassembly of the water-retaining ring 3 and the brush head 21. Specifically, the water-retaining ring 3 is made of soft rubber, and each water-retaining ring 3 is provided with scraper strips 33 spaced circumferentially. Each scraper strip 33 extends radially along the water-retaining ring 3 and is centered on the vent 211. The lowest point of each scraper strip 33 is higher than or flush with the bottom edge of the water-retaining ring 3, and the upper end of each scraper strip 33 extends upward along its own length to form an insert 34. The brush head 21 has slots 212 that correspond one-to-one with each insert 34 for insertion. This allows for detachable assembly and disassembly of the water-retaining ring 3 and the brush head 21, and also enables better brushing of the surface 10 to be cleaned. In this embodiment, preferably, the water-retaining ring 3 and each scraper strip 33 are an integral piece.

[0048] Furthermore, the aforementioned drum-drawing device 4 includes a cylindrical base 41 that rotates synchronously with the rotating shaft 22 and a flexible diaphragm 42. The diaphragm 42 is circumferentially connected to the upper port of the base 41, and the two together form a drum-drawing space 40. The middle part of the diaphragm 42 can bulge or collapse relative to the bottom wall of the base 41. Thus, when the diaphragm 42 bulges, air in the flow space 30 is drawn into the drum-drawing space 40 to form a negative pressure. When the diaphragm 42 collapses, gas in the drum-drawing space 40 is squeezed into the flow space 30, making the air pressure inside the flow space 30 greater than atmospheric pressure to form a positive pressure.

[0049] Furthermore, the aforementioned drum-pulling device 4 also includes a push-pull mechanism for pushing and pulling the diaphragm 42, thereby facilitating the upward or downward movement of the diaphragm 42 relative to the bottom wall of the base 41. Specifically, the push-pull mechanism includes a drive motor 43, a lifting sleeve 44, a bearing 45, and a connecting block 46 arranged sequentially from top to bottom along the straight direction of the rotation axis 22. The output shaft 431 of the drive motor 43 passes through the lifting sleeve 44, forming a helical transmission pair. The bottom of the connecting block 46 is fixed to the center of the diaphragm 42, while the top has a cylindrical mounting post 461. The bearing 45 is sleeved on the mounting post 461, and the connecting block 46 is connected to the lower end of the lifting sleeve 44 via the bearing 45. When the drive motor 43 rotates forward, it moves the lifting sleeve 44 upward, thereby pulling the diaphragm 42 upward relative to the bottom wall of the base 41. When the drive motor 43 rotates in reverse, it moves the lifting sleeve downward, thereby pushing the diaphragm 42 downward relative to the bottom wall of the base 41. The bearing 45 is used to prevent the lifting sleeve 44 from rotating with the connecting block 46. Preferably, the lower end of the lifting sleeve 44 is provided with a downward-facing, annular groove 441 centered on its own axis. The bearing 45 is accommodated in the annular groove 441, thereby achieving a stable installation of the bearing 45.

[0050] Furthermore, the vent 411 of the base 41 extends vertically downward in the circumferential direction to form a vent connector 4111. This vent connector 4111 is inserted into the upper airflow port 2201 of the rotating shaft 22, and a first sealing ring 5 is fitted on the vent connector 4111. The first sealing ring 5 is circumferentially sandwiched between the top edge of the rotating shaft 22 and the outer bottom surface of the base 41. This prevents air leakage at the connection between the vent 411 of the base 41 and the upper airflow port 2201 of the rotating shaft 22, thus better ensuring the negative pressure state of the water flow space 30. Meanwhile, the vent 211 of the brush head 21 extends vertically upward in the circumferential direction to form a vent connector 2111. The lower end of the rotating shaft 22 is inserted into the vent connector 2111, and a horizontally extending limiting perimeter 221 is circumferentially protruding on the outer surface of the lower end of the rotating shaft 22. A second sealing ring 7 is circumferentially sandwiched between the limiting perimeter 221 and the top edge of the vent connector 2111. This prevents air leakage at the connection between the downward airflow port 2202 of the rotating shaft 22 and the vent 211 of the brush head 21, thus better ensuring the negative pressure state of the water flow space 30.

[0051] The working process of the cleaning machine in this invention is as follows:

[0052] In self-cleaning mode, the water pump (not shown, a standard component of the cleaning machine) dispenses water for N seconds, then water continuously accumulates at the bottom of the cleaning machine. The water level rises above the bottom inlet of the disc brush 2 (controlled by the aforementioned water pump dispensing time) and then stops. At this time, the disc brush 2 does not rotate; only the drive motor 43 is activated, causing it to repeatedly rotate forward and backward. Specifically, when the drive motor 43 rotates forward, it pulls the diaphragm 42 upward, creating negative pressure in the water flow space 30. At this time, the inlet 3a opens and the outlet 3b closes, allowing water to continuously enter until the pressure inside the water flow space 30 returns to normal. Conversely, when the drive motor 43 rotates backward, it pushes the diaphragm 42 downward, creating positive pressure in the water flow space 30. At this time, the inlet 3a closes and the outlet 3b opens, squeezing out the water from the water flow space 30. Through the repeated movement of the drive motor 43, a continuous supply of fresh water is ensured to clean the disc brush 2.

[0053] After the drive motor 43 reciprocates for M seconds, it stops. Then, the fan (not shown, a standard component of the cleaning machine) starts working to drain the water from the bottom of the cleaning machine. This self-cleaning cycle is repeated once more to ensure cleaning effectiveness.

[0054] 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 that allows fluid to flow through, or a combination of the above.

Claims

1. A disc brush with self-cleaning function for a cleaning machine, comprising: Brush head (21) is used to sweep and brush the surface (10) to be cleaned; A rotating shaft (22) extends vertically and can rotate about its axis, and its lower end is connected to the brush head (21) mentioned above; Its characteristic is that it further includes: An airflow channel (220) is vertically installed in the aforementioned rotating shaft (22), including an upper airflow inlet (2201) at the upper end and a lower airflow inlet (2202) at the lower end; The water-blocking ring (3) is arranged around the bottom of the brush head (21) with the straight line of the rotating shaft (22) as the center. When the cleaning machine is in use, it forms a water flow space (30) with the bottom wall of the brush head (21) and the surface (10) to be swept and cleaned. It is provided with an openable and closable water inlet (3a) and water outlet (3b). The vent (211) is vertically installed at the center of the brush head (21) and located in the water flow space (30); The drum device (4) is installed on the rotating shaft (22) and has an air guide port (411) that is in fluid communication with the upper air flow port (2201); Furthermore, in self-cleaning mode, and when the above-mentioned suction device (4) is drawing air into the above-mentioned water flow space (30) through the above-mentioned airflow channel (220), the above-mentioned water inlet (3a) is open and the water outlet (3b) is closed. When the aforementioned pumping device (4) pumps air into the aforementioned water space (30) through the aforementioned airflow channel (220), the aforementioned inlet (3a) is closed and the outlet (3b) is open.

2. The self-cleaning disc brush for a cleaning machine as described in claim 1, characterized in that, The water inlets (3a) are at least two and are spaced apart on the water baffle (3) along the circumference. The water outlets (3b) are also at least two and are spaced apart on the water baffle (3) along the circumference. Each water inlet (3a) and each water outlet (3b) are spaced apart.

3. The self-cleaning disc brush for a cleaning machine as described in claim 1 or 2, characterized in that, The water-blocking ring (3) is made of soft rubber, and a U-shaped groove (31) with an upward opening is provided on the water-blocking ring (3), and a baffle (311) is formed in the U-shaped groove (31). The bottom of the brush head (21) is provided with a U-shaped baffle (32) protruding vertically. The baffle (32) corresponds to the U-shaped groove (31) and the two are arranged facing each other inside and out. Furthermore, the baffle (32) can cover the U-shaped groove (31) and abut against the edge of the baffle (311) along the length direction. The above-mentioned inlet (3a) and outlet (3b) are respectively composed of the above-mentioned U-shaped groove (31). The baffle (32) corresponding to the inlet (3a) is located outside the water-blocking ring (3), while the baffle (32) corresponding to the outlet (3b) is located inside the water-blocking ring (3).

4. The self-cleaning disc brush for a cleaning machine as described in claim 1 or 2, characterized in that, The water-blocking ring (3) is detachably installed on the brush head (21).

5. The self-cleaning disc brush for a cleaning machine as described in claim 4, characterized in that, The water-blocking ring (3) is made of soft rubber, and the water-blocking ring (3) is provided with scraper strips (33) at intervals along the circumference. Each scraper strip (33) extends radially along the water-blocking ring (3) and is set with the above-mentioned vent (211) as the center. The lowest point of each scraper strip (33) is higher than the bottom edge of the water-blocking ring (3) or flush with the bottom edge of the water-blocking ring (3). The upper end of each scraper strip (33) extends upward along its own length direction to form an insert (34). The brush head (21) is provided with a slot (212) that corresponds to each insert (34) and allows the corresponding insert (34) to be inserted.

6. The self-cleaning disc brush for a cleaning machine as described in claim 1 or 2, characterized in that, The drum-drawing device (4) includes a cylindrical base (41) that can rotate synchronously with the aforementioned rotating shaft (22) and a flexible diaphragm (42). The diaphragm (42) is circumferentially connected to the upper port of the base (41), and the two form a drum-drawing space (40). The middle part of the diaphragm (42) can bulge or collapse relative to the bottom wall of the base (41).

7. The self-cleaning disc brush for a cleaning machine as described in claim 6, characterized in that, The drum-pulling device (4) also includes a push-pull mechanism for pushing and pulling the diaphragm (42).

8. The self-cleaning disc brush for a cleaning machine as described in claim 7, characterized in that, The push-pull mechanism includes a drive motor (43), a lifting sleeve (44), a bearing (45), and a connecting block (46) arranged sequentially from top to bottom along the straight direction of the rotating shaft (22). The output shaft (431) of the drive motor (43) passes through the lifting sleeve (44) and the two form a helical transmission pair. The bottom of the connecting block (46) is fixed at the center of the diaphragm (42), and the top has a cylindrical mounting post (461). The bearing (45) is sleeved on the mounting post (461), and the connecting block (46) is connected to the lower end of the lifting sleeve (44) through the bearing (45).

9. The self-cleaning disc brush for a cleaning machine as described in claim 8, characterized in that, The lower end of the lifting sleeve (44) is provided with a downward-facing, annular groove (441) centered on its own axis, and the bearing (45) is housed in the annular groove (441).

10. The self-cleaning disc brush for a cleaning machine as described in claim 6, characterized in that, The air inlet (411) of the base (41) extends vertically downward along the circumferential direction to form an air connector (4111). The air connector (4111) is inserted into the air inlet (2201) of the rotating shaft (22). A first sealing ring (5) is fitted on the air connector (4111). The first sealing ring (5) is sandwiched between the top edge of the rotating shaft (22) and the outer bottom surface of the base (41) along the circumferential direction.

11. The self-cleaning disc brush for a cleaning machine as described in claim 1 or 2, characterized in that, The vent (211) of the brush head (21) extends vertically upward in the circumferential direction to form a vent connector (2111). The lower end of the shaft (22) is inserted into the vent connector (2111). A horizontally extending limiting perimeter (221) is convex in the circumferential direction on the outer surface of the lower end of the shaft (22). A second sealing ring (7) is sandwiched in the circumferential direction between the limiting perimeter (221) and the top edge of the vent connector (2111).

12. A floor brush module for a cleaning machine, comprising a housing (1) having an internal air guide channel, and the housing (1) having a dust suction port (11) on the front side in the direction of travel of the cleaning machine, the housing (1) also having an exhaust port (12), the air guide channel being arranged between the dust suction port (11) and the exhaust port (12) along the direction of fluid flow, characterized in that, It also includes a self-cleaning disc brush (2) for a cleaning machine as described in any one of claims 1 to 11, wherein the brush head (21) of the disc brush (2) is rotatably disposed at the dust inlet (11) of the upper housing (1).

13. A cleaning machine, characterized in that, Includes the floor brush module for a cleaning machine as described in claim 12.

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