Swimming pool cleaning apparatus and cleaning system

Abstract

The present disclosure relates to the technical field of water body cleaning, and provides a cleaning system and a swimming pool cleaning apparatus. The cleaning system comprises: at least two rolling brushes, the at least two rolling brushes being arranged in parallel to each other, an opening being provided in the bottom of a corresponding swimming pool cleaning apparatus between rotating shafts of the at least two parallel rolling brushes, and the opening at least being one of water inlets in fluid communication with a filtering system in the swimming pool cleaning apparatus; and a rolling brush driving source, which is in driving connection with the at least two rolling brushes by means of at least one transmission structure and is used for driving the at least two rolling brushes to rotate towards each other. The cleaning system provided by the present disclosure can be applied to a swimming pool cleaning apparatus. The opening which is provided in the bottom of the corresponding apparatus between the at least two parallel rolling brushes spaced apart from each other by a close distance forms a relatively closed suction space, so as to improve the negative pressure between the rolling brushes, rapidly drawing in a dust-carrying water flow, and thus improving the cleaning capability of the apparatus. In addition, the height of a chassis of the apparatus can be properly increased to improve the obstacle crossing capability of the apparatus.

Description

Swimming pool cleaning device and cleaning system Technical Field

[0001] The present disclosure relates to the technical field of water cleaning, and in particular to a swimming pool cleaning device and a cleaning system. Background Art

[0002] A swimming pool cleaning machine is a device specifically used to clean and maintain the water quality of a swimming pool. It is generally designed to move on the bottom and walls of the pool, and use brushes or rollers to move on the bottom and walls of the pool to scrub away dirt. It then removes debris, dirt and other garbage from the bottom of the pool through adsorption and filtration, and finally discharges clean water back into the pool to achieve the purpose of swimming pool cleaning.

[0003] However, in actual use, it has been found that when existing pool cleaning machines clean the pool bottom and walls, the brushes or rollers may not clean thoroughly on some uneven surfaces. Furthermore, the dirt stirred up by the brushes is not easily absorbed into the machine, and the remaining dirt spreads into the surrounding water, resulting in poor cleaning results. Therefore, those skilled in the art would like to optimize and improve the cleaning system of pool cleaning machines to further enhance the cleaning capabilities of the machines.

[0004] Summary of the Invention

[0005] The purpose of the present disclosure is to provide a swimming pool cleaning device and a cleaning system to solve the technical problem that existing swimming pool cleaning machines have poor cleaning effects on the pool bottom and pool walls.

[0006] To achieve the above objectives, the technical solutions adopted in this disclosure are:

[0007] On the one hand, the present disclosure provides a cleaning system for use in swimming pool cleaning equipment, comprising: at least two roller brushes, the at least two roller brushes being arranged in parallel, and an opening being provided at the bottom of the corresponding swimming pool cleaning equipment between the rotating shafts of the at least two parallel roller brushes, the opening being at least one of the water inlets in fluid communication with a filtration system inside the swimming pool cleaning equipment; and a roller brush drive source, being transmission-connected to the at least two roller brushes via at least one transmission structure, for driving the at least two roller brushes to rotate toward each other.

[0008] In some optional solutions, the width of the opening is greater than or equal to the distance between the circumferential profiles of two adjacent roller brushes located on both sides of the opening in the width direction.

[0009] In some optional schemes, the roller brush driving source includes a walking mechanism of the swimming pool cleaning equipment; the walking mechanism includes: walking wheels, tracks and drive motors, the walking wheels include at least a first rear wheel, a second rear wheel and a first front wheel, a second front wheel, the first front wheel and the first rear wheel are sleeved with a first track around their outer circumferences, and the second front wheel and the second rear wheel are sleeved with a second track around their outer circumferences, the number of the drive motor is at least one, and at least one of the drive motors is transmission-connected to at least one walking wheel; the at least two roller brushes are arranged between the first front wheel and the second front wheel, and the at least two roller brushes are driven to rotate by the first front wheel and / or the second front wheel through at least one transmission structure; or the at least two roller brushes are driven to rotate by at least one drive motor through at least one transmission structure or directly; or the at least two roller brushes are driven to rotate by at least one drive motor and a front wheel through at least one transmission structure.

[0010] In some optional embodiments, the roller brush includes a first roller brush and a second roller brush. When viewed from the side, the axis of the first roller brush is located outside or inside the outline of the front wheel, and the axis of the second roller brush is located inside or outside the outline of the front wheel; or the axes of the first and second roller brushes are both inside the outline of the front wheel.

[0011] In some optional schemes, the at least two roller brushes include a first roller brush and a second roller brush; the first roller brush is connected to the first front wheel or the second front wheel through a first transmission structure; the second roller brush is connected to the first front wheel or the second front wheel through a second transmission structure, and the first transmission structure and the second transmission structure are different; when the first or second front wheel rotates, it drives the first roller brush and the second roller brush to rotate towards each other.

[0012] In some optional schemes, the at least two roller brushes include a first roller brush and a second roller brush; the first roller brush is connected to the first front wheel through a first transmission structure; the second roller brush is connected to the second front wheel through a second transmission structure; the first transmission structure and the second transmission structure are different; when the first and second front wheels rotate, the first roller brush and the second roller brush are driven to rotate towards each other.

[0013] In some optional schemes, the at least two roller brushes include two groups, each group includes a first-section roller brush and a second-section roller brush, and the first-section roller brush and the second-section roller brush are connected in a circumferential rotational manner; the first-section roller brushes of the two groups are respectively connected to the first front wheel through a first transmission structure; the second-section roller brushes of the two groups are respectively connected to the second front wheel through a second transmission structure, wherein the first transmission structure and the second transmission structure are the same; when the first front wheel rotates, it drives the first-section roller brushes of the two groups to rotate toward each other; when the second front wheel rotates, it drives the second-section roller brushes of the two groups to rotate toward each other.

[0014] In some optional solutions, a drive motor is provided in the first or second roller brush, the first or second roller brush is fixedly connected to the drive motor and rotates with the drive motor, the drive motor is connected to the first or second front wheel through a first transmission structure, and the second roller brush is connected to the first or second front wheel through a second transmission structure. When the drive motor rotates, it drives the first or second roller brush and the first or second front wheel to rotate, and the rotation of the first or second front wheel drives the second or first roller brush to rotate;

[0015] Or two drive motors, including a first drive motor and a second drive motor, the first drive motor is arranged in the first roller brush, the first roller brush is fixedly connected to the first drive motor, and rotates with the first motor, the second drive motor is arranged in the second roller brush, the second roller brush is fixedly connected to the second drive motor, and rotates with the second motor.

[0016] In some optional schemes, the first and second transmission structures are each any one of a series of structures: the first: a roller brush gear is provided on the rotating shaft of a roller brush, the front wheel is provided with at least external teeth and internal teeth, and the roller brush gear is meshed and transmitted with the external teeth or internal teeth on the front wheel; the second: a roller brush gear is provided on the rotating shaft of a roller brush, the front wheel is provided with at least central teeth, the roller brush gear is meshed and transmitted with the central teeth on the front wheel, or the roller brush gear is meshed and transmitted with the central teeth on the front wheel through a transition gear; the third: two roller brush gears, the first roller brush gear is provided on the rotating shaft of the first roller brush or a segment of the first roller brush, the second roller brush gear is provided on the rotating shaft of the second roller brush or a segment of the second roller brush, and the front wheel is provided with at least central teeth. It is provided with external teeth and internal teeth, and the first roller brush gear and the second roller brush gear are respectively meshed and connected with the external teeth and internal teeth on the front wheel; the fourth type: two roller brush gears, the first roller brush gear is arranged on the rotating shaft of the first roller brush or the segment of the first roller brush, and the second roller brush gear is arranged on the rotating shaft of the second roller brush or the segment of the second roller brush, and at least a center tooth is provided on the front wheel, and the first and second roller brush gears are respectively meshed and connected with the center teeth on the front wheel, wherein the first or second roller brush gear is meshed and connected with the center teeth on the front wheel through a transition gear; the fifth type, a driving gear, is arranged on the output shaft of the driving motor, and the front wheel is provided with one of external teeth, internal teeth or center teeth, and the driving gear is meshed and connected with the external teeth, internal teeth or center teeth on the front wheel.

[0017] In some optional solutions, the roller brush driving source includes: at least one roller brush motor; the at least one roller brush motor is rotationally connected to the at least two roller brushes via at least one transmission structure to drive the at least two roller brushes to rotate.

[0018] In some optional schemes, each roller brush includes a rotating shaft, a sleeve and blades, the sleeve is mounted on the rotating shaft, there are multiple blades, one end of each blade is axially and circumferentially connected to the sleeve; the blades on two roller brushes rotating in opposite directions are in contact or spaced apart.

[0019] On the other hand, the present disclosure further provides a swimming pool cleaning device, comprising at least one water inlet, a filtering system, and a walking mechanism, and also comprising the above-mentioned cleaning system.

[0020] The beneficial effects of the cleaning system provided by the present invention are at least that: by forming a relatively closed suction space through the corresponding openings at the bottom of the device between at least two parallel and closely spaced roller brushes, the negative pressure between the roller brushes is increased to quickly draw in the dust-carrying water flow and improve the cleaning ability of the equipment; at the same time, the height of the equipment chassis can be appropriately increased to enhance the obstacle-crossing ability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] FIG1 is a schematic side view of the structure of a cleaning system on a swimming pool cleaning device provided by an embodiment of the present disclosure;

[0023] FIG2 is a schematic structural diagram of a bottom shell at the bottom of a swimming pool cleaning device provided by an embodiment of the present disclosure;

[0024] FIG3 is a structural schematic diagram of a roller brush provided by an embodiment of the present disclosure;

[0025] FIG4 is a side view schematically showing the positional relationship of two roller brushes provided in an embodiment of the present disclosure;

[0026] FIG5 is a schematic structural diagram of a walking mechanism and a cleaning system provided by an embodiment of the present disclosure;

[0027] FIG6 is a structural diagram 1 of a traveling wheel provided in an embodiment of the present disclosure;

[0028] FIG7 is a second structural diagram of a traveling wheel provided in an embodiment of the present disclosure;

[0029] FIG8 is a side structural cross-sectional view of a walking mechanism and a cleaning system provided by an embodiment of the present disclosure;

[0030] FIG9 is a second side structural cross-sectional view of a walking mechanism and a cleaning system provided by an embodiment of the present disclosure;

[0031] FIG10 is a first schematic diagram of the transmission relationship between a walking mechanism and a roller brush provided in an embodiment of the present disclosure;

[0032] FIG11 is a second schematic diagram of the transmission relationship between a walking mechanism and a roller brush provided in an embodiment of the present disclosure;

[0033] FIG12 is a third schematic diagram of the transmission relationship between a walking mechanism and a roller brush provided in an embodiment of the present disclosure;

[0034] FIG13 is a fourth schematic diagram of the transmission relationship between a walking mechanism and a roller brush provided in an embodiment of the present disclosure.

[0035] Figure numerals: 1. Cleaning system; 11. Roller brush; 11A. Rotating shaft; 11B. Bushing; 11C. Blade; 111. First roller brush; 112. Second roller brush; 12. Opening; 13. Roller brush gear; 131. First roller brush gear; 132. Second roller brush gear; 14. Transition gear; 2. Swimming pool cleaning device; 21. Bottom shell; 211. Roller brush compartment; 22. Filter system; 231. Travel wheel; 2311. First front wheel; 2312. Second front wheel; 2313. First rear wheel; 2314. Second rear wheel; 232. Track; 233. Drive motor; 2331. Drive gear; 231A. First outer tooth; 231B. Second outer tooth; 231C. Inner tooth; 231D. Center tooth; 2321. Tooth groove; 2331. Drive gear. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present disclosure more clearly understood, the present disclosure is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not intended to limit the present disclosure.

[0037] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be located directly or indirectly on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positions shown in the accompanying drawings and are only for the convenience of description and cannot be understood as limitations on this technical solution. The terms "first" and "second" are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0038] 1 and 2 , an embodiment of the present disclosure provides a cleaning system, comprising at least two roller brushes 11 and a roller brush drive source. The at least two roller brushes 11 are arranged in parallel, and an opening 12 is provided on the bottom of the corresponding pool cleaning device (hereinafter referred to as the device), such as the bottom shell 21, between the rotating shafts of the at least two parallel roller brushes 11. The opening 12 is at least one of the water inlets connected to the fluid of the filtration system inside the pool cleaning device. The roller brush drive source is connected to the at least two roller brushes 11 through at least one transmission structure to drive the at least two roller brushes 11 to rotate toward each other.

[0039] 2 , the opening 12 at the bottom of the device is provided on a bottom housing 21. The bottom housing 21 is further provided with two roller brush compartments 211 in the width direction of the opening 12 for mounting the roller brushes 11. In some embodiments, the number of roller brushes 11 can be two, namely, a first roller brush 111 and a second roller brush 112. The cleaning system is applied to a swimming pool cleaning device, where the roller brush 11 rotates to scrub the surface to be cleaned, such as the pool bottom or wall. During operation, the first roller brush 111 and the second roller brush 112 both contact the surface to be cleaned. Simultaneously, the walls of the roller brush compartments 211 or the side walls of the cleaning device, located at both ends of the two roller brushes 11, are close to the ground surface to be cleaned, or brushes or soft rubber are provided on the walls of the roller brush compartments 211 or the side walls of the cleaning device near the surface to be cleaned, thereby forming a relatively enclosed negative pressure space. This space can more effectively draw the dust-carrying water flow into the device, preventing the stirred-up dirt from becoming suspended in the water and unable to be effectively cleaned, thereby improving the device's underwater cleaning capability. In addition, as the negative pressure increases, the bottom of the equipment can be designed to be appropriately away from the surface to be cleaned, thereby increasing the ground height of the equipment and improving the obstacle-crossing ability of the equipment.

[0040] In conjunction with Figures 2 and 3 , in some embodiments, the roller brush 11 includes a rotating shaft 11A, a sleeve 11B, and blades 11C. The sleeve 11B is mounted on the rotating shaft 11A, and there are multiple blades 11C, each of which has one end circumferentially connected to the sleeve 11B and the other end free. Alternatively, the blades 11C are formed on a base that surrounds the sleeve 11B or the rotating shaft 11A, forming an axial roller brush configuration. When the first roller brush 111 and the second roller brush 112 rotate, the blades 11C on the two rollers either do not interfere with each other or do interfere with each other. In one embodiment, when the first roller brush 111 and the second roller brush 112 rotate, the blades 11C on the two rollers interfere with each other, which is more conducive to forming a relatively closed negative pressure space. In this way, the suction pressure generated by the filtration system can be better concentrated in the area between the two roller brushes, thereby increasing the suction force. At the same time, for large particles of garbage, the interference of the blades 11C of the roller brush 11 can also enhance the garbage lifting capacity, thereby effectively sucking in the water flow near the water inlet for filtration, thereby improving the cleaning ability of the cleaning equipment. In another embodiment, the blades 11C on the two rollers do not interfere with each other, which can reduce working noise and save energy.

[0041] Referring to Figure 4 , the distance between the center points of the rotational axes 11A of the two roller brushes 11 is L, and the lengths of the blades 11C of the two roller brushes 11 are d1 and d2, respectively. Assuming the minimum gap between the blades 11C of the two roller brushes 11 is g, then g = L - d1 - d2. As can be seen, when g < 0, the blades 11C on the two rollers interfere; when g ≥ 0, the blades 11C on the two rollers do not interfere. The minimum gap represents the distance between the tips of the corresponding blades on the two roller brushes 11 when their tips are on the line connecting the rotational axes 11A of the two roller brushes 11.

[0042] In one embodiment, the width of the opening 12 is greater than or equal to the distance between the circumferential profiles of two adjacent roller brushes 11 located on either side of the opening 12 in the width direction. Assuming the width of the water inlet is G, G ≥ g is generally true because a smaller g ensures negative pressure between the two roller brushes 11, while a larger G ensures that larger waste can be properly sucked in. It is understood that G ≤ L can be set to ensure the flow rate of the suction water.

[0043] In conjunction with Figures 1, 2, and 4, in some embodiments, when the device is positioned on a surface to be cleaned, the projection of the opening 12 on the surface to be cleaned at least partially overlaps with the projection of the distance between the ends of the blades 11C of the two roller brushes on the surface to be cleaned; and the opening 12 is further from the front end of the cleaning device in the direction of travel than this distance. When the device is cleaning, the roller brush is moving to draw trash from the surface to be cleaned into the opening 12. Due to inertia, positioning the opening further from the front end of the cleaning device in the direction of travel than this distance makes it easier for the trash to align with the opening, thereby allowing it to enter the opening smoothly.

[0044] 5 , in some embodiments, the roller brush drive source includes a walking mechanism of the pool cleaning device; as shown in FIG5 , the walking mechanism includes: walking wheels 231, tracks 232, and a drive motor 233; the walking wheels 231 include at least a first front wheel 2311, a second front wheel 2312, and a first rear wheel 2313, and a second rear wheel 2314; the first front wheel 2311 and the first rear wheel 2313 are sheathed with a first track, and the second front wheel 2312 and the second rear wheel 2314 are sheathed with a second track; the number of the drive motor 233 is at least one, for example, one or two, and at least one drive motor 233 is transmission-connected to at least one walking wheel 231;

[0045] At least two roller brushes 11, including a first roller brush 111 and a second roller brush 112, are disposed between the first front wheel 2311 and the second front wheel 2312. The first front wheel 2311 and / or the second front wheel 2312 can drive the at least two roller brushes 11 to rotate via at least one transmission structure; alternatively, the at least two roller brushes 11 can be driven to rotate by at least one drive motor 233 via at least one transmission structure or directly; alternatively, the at least two roller brushes 11 can be driven to rotate by at least one drive motor 233 and a front wheel via at least one transmission structure. A walking mechanism enables the device to move on or around the pool floor. Using the walking mechanism as the cleaning system's roller brush drive source allows the roller brushes 11 to rotate as the device moves, achieving a cleaning-as-you-go effect.

[0046] Of course, the walking mechanism of the device is not limited to the structure shown in Figure 5, and can also be implemented as other structures in practice. For example, in one embodiment, the walking mechanism only includes a walking wheel 231 and a drive motor 233, and the drive motor 233 directly drives the walking wheel 231 to rotate to achieve walking. At this time, the walking wheel 231 can also be used as a roller brush drive source to drive the roller brush 11 to rotate.

[0047] 6 , in some embodiments, at least one circle of external teeth is provided on the outer periphery of the traveling wheel 231, including first external teeth 231A and second external teeth 231B. The first external teeth 231A and the second external teeth 231B are arranged side by side along the axial direction of the traveling wheel 231, and internal teeth 231C are provided on the inner side of the traveling wheel 231.

[0048] With reference to Figure 7 , in some embodiments, the travel wheel 231 is provided with external teeth and a central tooth 231D. The axes of the external teeth and the central tooth 231D coincide with the axis of the travel wheel 231. The external teeth are arranged on the outer circumference of the travel wheel 231, and the central tooth 231D is arranged on the rotating shaft portion on one side of the travel wheel 231. For example, the external teeth in Figure 7 may be the first external teeth 231A in Figure 6 . The central tooth 231D is axially fixedly connected to one side of the travel gear, and the central tooth 231D coincides with the axis of the travel wheel 231.

[0049] In practice, at least one of the first front wheel 2311, the second front wheel 2312, the first rear wheel 2313, and the second rear wheel 2314 in the running mechanism can be the running wheel 231 of the structure shown in FIG6 or the running wheel 231 of the structure shown in FIG7. Of course, the running wheel 231 can also be implemented as a combination of at least one of the first outer teeth 231A, the second outer teeth 231B, the inner teeth 231C, and the center teeth 231D. For example, in one embodiment, the running wheel 231 is provided with only the first outer teeth 231A for transmission connection with the crawler track 232; or the running wheel 231 is provided with the first outer teeth 231A, the second outer teeth 231B, the inner teeth 231C, and the center teeth 231D.

[0050] 5-7 , in one embodiment, when the track 232 is sleeved on the outer periphery of the traveling wheel 231 , a tooth groove 2321 is provided on the track 232 , and the tooth groove 2321 matches the first outer tooth 231A, and the first outer tooth 231A is embedded in the tooth groove 2321 , so that the track 232 and the traveling wheel 231 form a tight connection in the circumferential direction. When the traveling wheel 231 rotates, the first outer tooth 231A and the tooth groove 2321 are mutually limited and locked, so that the track 232 is pulled or pushed to roll; when the track 232 rolls, the tooth groove 2321 on the track 232 and the outer teeth (such as the first outer tooth 231A) on the traveling wheel 231 are mutually limited and locked, so that the traveling wheel 231 is pulled or pushed to rotate.

[0051] 5-7 , in one embodiment, when a gear transmission is provided between the drive motor 233 and the travel wheel 231 , a drive gear 2331 is provided on the output shaft of the drive motor 233 , and the drive gear 2331 is engaged and matched with the outer teeth (e.g., the second outer teeth 231B), the inner teeth 231C or the center teeth 231D on the travel wheel 231 . When the drive motor 233 rotates, the travel wheel 231 is driven to rotate by the engagement transmission of the drive gear 2331 with the outer teeth (e.g., the second outer teeth 231B), the inner teeth 231C or the center teeth 231D on the travel wheel 231 .

[0052] In combination with Figures 1, 3, 6 and 7, in one embodiment, when the roller brush 11 is connected to the traveling wheel 231 in transmission, a roller brush gear is provided on one end of the rotating shaft of the roller brush 11, and the roller brush gear is engaged and matched with the outer teeth (for example, the second outer teeth 231B), the inner teeth 231C or the center teeth 231D on the traveling wheel 231. When the traveling wheel 231 rotates, the roller brush 11 can be driven to rotate by the engagement transmission of the outer teeth, the inner teeth 231C or the center teeth 231D with the roller brush gear; or, when the roller brush 11 rotates, the traveling wheel 231 is driven to rotate by the engagement transmission connection of the roller brush gear with the outer teeth, the inner teeth 231C or the center teeth 231D.

[0053] The embodiment in which the driving motor 233 is connected to the walking wheel 231 in a transmission manner to enable the walking mechanism to walk on at least one side is not the only one.

[0054] For example, in one embodiment, in combination with Figure 8, on one side of the walking mechanism, the rear wheel is provided with at least inner teeth 231C, and the front wheel is provided with inner teeth 231C and outer teeth. The output end of the drive motor 233 is engaged with the inner teeth 231C of the rear wheel through a drive gear 2331 for transmission. One end of the rotating shaft of the first roller brush 111 is provided with a first roller brush gear 131, and one end of the rotating shaft of the second roller brush 112 is provided with a second roller brush gear 132. The first roller brush gear 131 and the second roller brush gear 132 are respectively engaged with the outer teeth and the inner teeth 231C of the front wheel for transmission. When the motor rotates, it drives the rear wheel to rotate, and the rotation of the rear wheel drives the track 232 to roll, and the rolling of the track 232 drives the front wheel to rotate, thereby realizing the rolling walking of the track 232 on one side of the walking mechanism; at the same time, the rotation of the front wheel also simultaneously drives the two roller brushes to rotate toward each other. The same drive structure can also be used on the other side of the walking mechanism to enable the crawler 232 on the other side of the walking mechanism to roll. However, in this case, the crawler 232 on the other side of the walking mechanism does not need to use the walking mechanism to drive the roller brush. In addition, the crawler 232 on each side of the walking mechanism is driven by different motors independently. In this way, the crawler 232 on both sides of the walking mechanism can roll at the same speed or at different speeds. When the crawler 232 on both sides roll at the same speed, the equipment moves roughly in a straight line. When the crawler 232 on both sides roll at different speeds, the equipment will turn.

[0055] Of course, the walking mechanism may also have other driving schemes to achieve rolling walking of the tracks on both sides, and is not limited to the scheme shown in Figure 8. The embodiments of the present disclosure do not limit this.

[0056] In some embodiments, a front wheel, such as the first front wheel 2311 or the second front wheel 2312, can be used to drive at least two roller brushes 11 through at least one transmission structure. Referring to FIG8 , the roller brush 11 includes a first roller brush 111 and a second roller brush 112. The first roller brush 111 is connected to the first front wheel 2311 or the second front wheel 2312 via a first transmission structure. The second roller brush 112 is connected to the first front wheel 2311 or the second front wheel 2312 via a second transmission structure. The first transmission structure and the second transmission structure are different. When the first or second front wheel 2312 rotates, the first roller brush 111 and the second roller brush 112 rotate in opposite directions. Of course, if a rear wheel drives the two roller brushes, the situation is the same as that of the front wheel, and will not be further described here.

[0057] The difference between the first transmission structure and the second transmission structure may be a difference in physical structure or a difference in transmission results. For example, if the first transmission structure is a gear transmission structure, the difference in physical structure between the first and second transmission structures may include, but is not limited to, the number of gears, or the position or meshing relationship of the gears. For another example, if the transmission results differ, considering the rotational directions of the first roller brush 111 and the second roller brush 112, if the first transmission structure transmits the rotational motion of the first front wheel 2311 to the first roller brush 111 so that the rotational direction of the first roller brush 111 is the same as or opposite to the rotational direction of the first front wheel 2311, then the second transmission structure transmits the rotational motion of the first front wheel 2311 to the second roller brush 112 so that the rotational direction of the second roller brush 112 is the same as or opposite to the rotational direction of the first front wheel 2311. This ensures that the first roller brush 111 and the second roller brush 112 rotate in opposite directions.

[0058] 8 , in one embodiment, the first transmission structure includes: a first roller brush gear 131, which is disposed at one end of the rotating shaft of the first roller brush 111; external teeth and internal teeth 231C are provided on the first front wheel 2311 or the second front wheel 2312, and the first roller brush gear 131 is meshed and transmission-connected with the external teeth of the first or second front wheel 2312, such that the first roller brush 111 and the first or second front wheel 2312 rotate in opposite directions. The second transmission structure includes: a second roller brush gear 132, which is disposed at one end of the rotating shaft of the second roller brush 112; external teeth and internal teeth 231C are provided on the first front wheel 2311 or the second front wheel 2312, and the second roller brush gear 132 is meshed and transmission-connected with the internal teeth 231C of the first or second front wheel 2312, such that the second roller brush 112 and the first or second front wheel 2312 rotate in the same direction. It can be seen that the first or second front wheel 2312 drives the first roller brush 111 and the second roller brush 112 to rotate through the first transmission structure and the second transmission structure, so that the rotation directions of the first roller brush 111 and the second roller brush 112 are opposite. No matter which direction the first or second front wheel 2312 rotates, the two always rotate in opposite directions.

[0059] Of course, the first transmission structure can also be a meshing transmission connection between the first roller brush gear 131 and the internal teeth 231C of the first or second front wheel 2312, while the second transmission structure can be a meshing transmission connection between the second roller brush gear 132 and the external teeth of the first or second front wheel 2312. This is equivalent to a reciprocal transmission result, and can also achieve the opposite rotation of the first and second roller brushes 112. However, to better collect waste in the water, in practice, the transmission structure shown in Figure 8 can be optionally adopted, so that when the walking mechanism moves forward, both the first and second roller brushes 112 rotate toward the opening 12, so as to quickly draw the waste into the opening 12.

[0060] 9 , in another embodiment, the first transmission structure includes: a first roller brush gear 131, which is disposed at one end of the rotating shaft of the first roller brush 111; a center tooth 231D is provided on the first front wheel 2311 or the second front wheel 2312; the first roller brush gear 131 is meshed and transmission-connected with the center tooth 231D of the first or second front wheel 2312, such that the first roller brush 111 and the first or second front wheel 2312 rotate in opposite directions. The second transmission structure includes: a second roller brush gear 132, which is disposed at one end of the rotating shaft of the second roller brush 112; a center tooth 231D is provided on the first front wheel 2311 or the second front wheel 2312; the second roller brush gear 132 is meshed and transmission-connected with the center tooth 231D of the first or second front wheel 2312 via a transition gear 14, such that the second roller brush 112 and the first or second front wheel 2312 rotate in the same direction. Thus, the first or second front wheel 2312 drives the first and second roller brushes to rotate respectively via two different transmission structures, so that the first and second roller brushes rotate in opposite directions when the traveling mechanism is traveling. Of course, the first and second transmission structures can also be interchanged to achieve the same effect of achieving the opposite rotation of the first and second roller brushes, which will not be described in detail here.

[0061] It is understandable that the first or second front wheel 2312 is a direct driving source for driving the roller brush to rotate through a transmission structure. As for how the first and second front wheels 2312 are driven to move in the walking mechanism, this embodiment of the disclosure does not discuss this.

[0062] In some embodiments, a front wheel, such as the first front wheel 2311 or the second front wheel 2312, can drive at least two roller brushes 11 to rotate through at least one transmission structure. In conjunction with Figures 8 and 9, the roller brush 11 includes a first roller brush 111 and a second roller brush 112. Viewed from the side, the axis of the first roller brush 111 is located outside or inside the outline of the front wheel, and the axis of the second roller brush 112 is located inside or outside the outline of the front wheel; or the axes of the first and second roller brushes are both inside the outline of the front wheel.

[0063] In some embodiments, two front wheels, such as the first front wheel 2311 and the second front wheel 2312, can be used to drive at least two roller brushes to rotate through at least one transmission structure. In conjunction with Figure 10, the at least two roller brushes include a first roller brush 111 and a second roller brush 112; the first roller brush 111 is connected to the first front wheel 2311 through a first transmission structure; the second roller brush 112 is connected to the second front wheel 2312 through a second transmission structure; the first transmission structure and the second transmission structure are different; when the first and second front wheels 2312 rotate, they drive the first roller brush 111 and the second roller brush 112 to rotate towards each other.

[0064] Here, one front wheel drives one roller brush. Since the two front wheels rotate in the same direction when the traveling mechanism is rolling, to enable the first and second roller brushes to rotate in opposite directions, one front wheel drives one roller brush in one direction, and the other front wheel drives the other roller brush in the opposite direction, thereby achieving the two roller brushes rotating in opposite directions. Thus, the first transmission structure and the second transmission structure are different, and the directions of motion transmitted by the two roller brushes meshing with the front wheels are opposite.

[0065] With reference to FIG8 , in one embodiment, the first transmission structure may include: a first roller brush gear 131, disposed at one end of the rotating shaft of the first roller brush 111; a first front wheel 2311 having external teeth and internal teeth 231C, wherein the first roller brush gear 131 meshes with the external teeth of the first front wheel 2311 for transmission connection, such that the first roller brush 111 and the first front wheel 2311 rotate in opposite directions. Correspondingly, the second transmission structure may include: a second roller brush gear 132, disposed at one end of the rotating shaft of the second roller brush 112; and a second front wheel 2312 having external teeth and internal teeth 231C, wherein the second roller brush gear 132 meshes with the internal teeth 231C of the second front wheel 2312 for transmission connection, such that the second roller brush 112 and the second front wheel 2312 rotate in the same direction.

[0066] In addition, when the first front wheel 2311 and the second front wheel 2312 are provided with a center tooth 231D, the first transmission structure and the second transmission structure can refer to the embodiment shown in Figure 9 above. The only difference between the two is whether the first transmission structure and the second transmission structure are separated. The motion transmission effect is the same and will not be repeated here.

[0067] In some embodiments, two front wheels, such as the first front wheel 2311 and the second front wheel 2312, can be used to drive at least two roller brushes to rotate through at least one transmission structure. In conjunction with Figure 11, the at least two roller brushes include two groups, each group includes a first-section roller brush and a second-section roller brush, which is equivalent to four roller brushes, wherein the first-section roller brush and the second-section roller brush are circumferentially connected; the first-section roller brushes of the two groups are respectively connected to the first front wheel 2311 through the first transmission structure; the second-section roller brushes of the two groups are respectively connected to the second front wheel 2312 through the second transmission structure, wherein the first transmission structure and the second transmission structure are the same; when the first front wheel 2311 rotates, it drives the first-section roller brushes of the two groups to rotate toward each other; when the second front wheel 2312 rotates, it drives the second-section roller brushes of the two groups to rotate toward each other.

[0068] Since the first and second front wheels 2312 each drive one section of the two sets of rollers, the transmission structures on both sides of the walking mechanism can adopt the same structure.

[0069] For example, in combination with Figure 8, in one embodiment, the first transmission structure here may include: a first roller brush gear 131 and a second roller brush gear 132, the first roller brush gear 131 is arranged at one end of the rotating shaft of the first section roller brush of the first group; the second roller brush gear 132 is arranged at one end of the rotating shaft of the first section roller brush of the second group; the first front wheel 2311 is provided with at least inner teeth 231C and outer teeth, the first roller brush gear 131 is meshed with the outer teeth on the first front wheel 2311 for transmission connection, so that the first section roller brush of the first group and the first front wheel 2311 have opposite rotation directions; the second roller brush gear 132 is meshed with the inner teeth 231C on the first front wheel 2311 for transmission connection, so that the first section roller brush of the second group and the first front wheel 2311 have the same rotation direction, so that the first sections roller brushes in the two groups rotate in opposite directions.

[0070] For another example, in combination with Figure 9, in one embodiment, the first transmission structure here may also include: a first roller brush gear 131 and a second roller brush gear 132, the first roller brush gear 131 is arranged at one end of the rotating shaft of the first section roller brush of the first group; the second roller brush gear 132 is arranged at one end of the rotating shaft of the first section roller brush of the second group; at least a center tooth 231D is provided on the first front wheel 2311, the first roller brush gear 131 is meshed with the center tooth 231D on the first front wheel 2311 for transmission connection, so that the rotation directions of the first section roller brush of the first group and the first front wheel 2311 are opposite; the second roller brush gear 132 is meshed with the center tooth 231D on the first front wheel 2311 through a transition gear 14, so that the rotation directions of the first section roller brush of the second group and the first front wheel 2311 are the same, so that the first sections roller brushes in the two groups rotate in opposite directions.

[0071] It is understandable that since the second transmission structure is the same as the first transmission structure, it will not be described in detail here.

[0072] In some embodiments, at least two roller brushes can be driven to rotate by a drive motor 233 and a front wheel, such as the first front wheel 2311 or the second front wheel 2312, through at least one transmission structure. Combined with Figure 12, the walking mechanism includes a drive motor 233, which is arranged in the first or second roller brush 112. The first or second roller brush is fixedly connected to the drive motor 233 and rotates with the drive motor 233. The drive motor 233 is connected to the first or second front wheel 2312 through the first transmission structure, and the second roller brush 112 is connected to the first or second front wheel 2312 through the second transmission structure. When the drive motor 233 rotates, it drives the first or second roller brush and the first or second front wheel 2312 to rotate. The rotation of the first or second front wheel 2312 drives the second or first roller brush to rotate.

[0073] 5, 6, 7, 8, and 12, the first transmission structure includes a drive gear 2331 mounted on the output shaft of the drive motor 233. The first or second front wheel is provided with at least one of internal teeth 231C, external teeth, or center teeth 231D. The drive gear 2331 is meshed and connected to the internal teeth 231C, external teeth, or center teeth 231D on the first or second front wheel. The drive motor 233 drives the first or second front wheel 2312 to rotate through this first transmission structure, and the roller brush (e.g., the first or second roller brush) on which the drive motor 233 is mounted rotates accordingly.

[0074] Accordingly, referring to Figures 5, 6, 7, 8, and 12, if the drive motor 233 is disposed within the first roller brush 111, the second transmission structure includes: a roller brush gear 13 disposed at one end of the rotating shaft of the second roller brush 112 and meshingly connected to the inner teeth 231C, the outer teeth, or the center teeth 231D on the first or second front wheel. If the drive gear 2331 meshes with the inner teeth 231C, then in the second transmission structure, the roller brush gear 13 should mesh with the outer teeth, or mesh with the center teeth 231D. Furthermore, if the drive gear 2331 meshes with the outer teeth or the center teeth 231D, then the roller brush gear 13 also meshes with the corresponding gear to ensure that the first roller brush 111 and the second roller brush 112 rotate in opposite directions.

[0075] In some embodiments, two drive motors 233, such as a first drive motor and a second drive motor, can be used to drive at least two roller brushes to rotate through at least one transmission structure. Combined with Figure 13, the walking mechanism includes two drive motors 233, namely a first drive motor and a second drive motor. The first drive motor is arranged in the first roller brush 111, and the first roller brush 111 is fixedly connected to the first drive motor and rotates with the first motor. The second drive motor is arranged in the second roller brush 112, and the second roller brush 112 is fixedly connected to the second drive motor and rotates with the second motor.

[0076] In this drive embodiment, the roller brush is fixedly connected to the drive motor 233. When the drive motor 233 rotates, it drives the roller brush to rotate together. The fixed connection between the output shaft of the drive motor 233 and the rotating shaft of the roller brush varies. In some connection structures, a transmission structure may not be used. For example, the output shaft of the drive motor 233 is axially connected to the rotating shaft of the roller brush. In other connection structures, a transmission structure may be used. For example, the output shaft of the drive motor 233 and the rotating shaft of the roller brush may be connected through a reduction gear set. The specific implementation of the reduction gear set varies and is not limited in this embodiment of the present disclosure.

[0077] In some embodiments, the roller brush drive source may also include at least one roller brush motor, which is rotatably connected to the at least two roller brushes via at least one transmission structure to drive the at least two roller brushes to rotate. The roller brush motor is independent of the travel mechanism and is a dedicated motor for driving the roller brushes. The transmission structure between the roller brush motor and the roller brushes may be a gear transmission structure or a belt transmission structure, etc., which is not limited in the presently disclosed embodiments.

[0078] In some embodiments, in conjunction with Figures 1-5, the present disclosure also provides a swimming pool cleaning device 2, which includes at least one water inlet, a filtration system 22, a walking mechanism 23 and a cleaning system 1, the cleaning system including:

[0079] At least two parallel roller brushes 11 are at least partially arranged in at least two roller brush bins arranged at the bottom of the cleaning device; at least one water inlet is arranged between the at least two roller brush bins and is connected to the fluid of the filtration system; at least two parallel roller brushes are driven by a walking mechanism to rotate in opposite directions; at least two roller brushes include blades, and the minimum spacing between the ends of the blades on the two roller brushes is less than or equal to the width of the water inlet.

[0080] In conjunction with Figures 1 and 5 , in some embodiments, at least two parallel roller brushes are driven by the travel mechanism to rotate toward each other, including one of the following: driven by a single travel wheel, or driven by two travel wheels. The specific implementation of the travel wheel-driven roller brushes can be referenced with the above-mentioned embodiments of the cleaning system and will not be further described here.

[0081] The water inlet is located at the bottom of the device. In practice, there can be multiple water inlets, for example, two, one located on the bottom shell corresponding to the two roller brushes at the bottom of the device, and the other located on the side of the device, particularly near the front end. The water inlet is fluidically connected to the filtration system, and the device generates suction to extract trash near the water inlet, causing the trash to enter the filtration system along with the water flow. The filtration system then filters the trash in the water flow, producing clean water that is discharged out of the device and returned to the pool, thereby achieving the purpose of cleaning.

[0082] In some embodiments, referring to Figures 1 and 4 , the projection of the water inlet on the surface to be cleaned at least partially overlaps with the projection of the distance between the blade tips of the two roller brushes on the surface to be cleaned; and the water inlet is further away from the front end of the cleaning device than the distance. Thus, when the device is cleaning, the roller brushes are moving as they draw debris from the surface to be cleaned into the opening 12. Due to inertia, positioning the opening further away from the front end of the cleaning device in the direction of travel than the distance allows the debris to more easily align with the opening and thus enter smoothly.

[0083] Specifically, the walking structure is generally provided at the bottom of the equipment, and is used to pull or push the equipment to move on the bottom or wall of the pool. In one embodiment, in conjunction with Figure 1, the walking mechanism is provided at the bottom of the equipment, and the cleaning system is provided at the bottom and is connected to the walking mechanism. When the equipment moves through the walking mechanism, the roller brush of the cleaning system can be driven to rotate at the same time to achieve the effect of cleaning while walking. At the same time, a filtration system is also provided above the walking mechanism. From the perspective of the equipment's movement direction, the filtration system can be provided above the walking mechanism near the rear end of the equipment. In this way, when the equipment is moving, the filtration system draws dust-laden water from the water inlet at the bottom for filtration, and then discharges the filtered water to the rear. Alternatively, the filtration system can also be set on the walking mechanism near the middle of the equipment. In this case, a water spray mechanism can also be set at the rear position of the equipment. The water spray mechanism is connected to the outlet fluid of the filtration system, and the water flow passing through the filtration system is sprayed outward by the water spray mechanism. Since the water spray mechanism will generate a reverse thrust while spraying water, the nozzle of the water spray mechanism can be designed to be direction-adjustable. When the equipment is cleaning the bottom or wall of the pool, the nozzle direction is switched to spray water outward roughly perpendicular to the bottom of the equipment. The reverse thrust generated by the water spraying generates a downward pressure on the equipment, allowing the equipment to be closer to the surface to be cleaned, increasing the friction between the roller brush and the surface to be cleaned, so as to better wash away the dirt on the surface to be cleaned; when the cleaning equipment is cleaning on the water surface, the nozzle direction can be adjusted to be roughly parallel to the direction of travel, and water can be sprayed in the opposite direction of the direction of travel, and the reverse thrust generated by the water spraying is used as an auxiliary traction force or propulsion force for the equipment.

[0084] The above are only preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. A cleaning system, applied to a pool cleaning device, characterized in that, include: At least two roller brushes, the at least two roller brushes are arranged in parallel, and an opening is opened at the bottom of the corresponding swimming pool cleaning device between the rotating shafts of the at least two parallel roller brushes, and the opening is at least one of the water inlets connected to the filter system fluid inside the swimming pool cleaning device; The roller brush driving source is transmission-connected to the at least two roller brushes through at least one transmission structure, and is used for driving the at least two roller brushes to rotate towards each other.

2. The cleaning system according to claim 1, wherein: The width of the opening is greater than or equal to the distance between the circumferential profiles of two adjacent roller brushes located on both sides of the opening in the width direction.

3. The cleaning system according to claim 1, characterized in that: The roller brush driving source includes a walking mechanism of the swimming pool cleaning equipment; The walking mechanism comprises: walking wheels, crawler tracks and driving motors, wherein the walking wheels at least comprise a first rear wheel, a second rear wheel, a first front wheel and a second front wheel, the first front wheel and the first rear wheel are sleeved with first crawler tracks on their outer circumferences, the second front wheel and the second rear wheel are sleeved with second crawler tracks on their outer circumferences, and the number of the driving motors is at least one, and at least one of the driving motors is drivingly connected to at least one walking wheel; The at least two roller brushes are arranged between the first front wheel and the second front wheel, and the at least two roller brushes are driven to rotate by the first front wheel and / or the second front wheel through at least one transmission structure; or the at least two roller brushes are driven to rotate by at least one drive motor through at least one transmission structure or directly; or the at least two roller brushes are driven to rotate by at least one drive motor and a front wheel through at least one transmission structure.

4. The cleaning system according to claim 3, wherein: The roller brush includes a first roller brush and a second roller brush. When viewed from the side, the axis of the first roller brush is located outside or inside the outline of the front wheel, and the axis of the second roller brush is located inside or outside the outline of the front wheel; or the axes of the first and second roller brushes are both inside the outline of the front wheel.

5. The cleaning system according to claim 3, characterized in that: The at least two roller brushes include a first roller brush and a second roller brush; The first roller brush is connected to the first front wheel or the second front wheel through the first transmission structure; The second roller brush is connected to the first front wheel or the second front wheel through a second transmission structure, and the first transmission structure and the second transmission structure are different; When the first or second front wheel rotates, the first roller brush and the second roller brush are driven to rotate towards each other.

6. The cleaning system according to claim 3, characterized in that: The at least two roller brushes include a first roller brush and a second roller brush; The first roller brush is transmission-connected to the first front wheel via the first transmission structure; The second roller brush is connected to the second front wheel through a second transmission structure; the first transmission structure and the second transmission structure are different; When the first and second front wheels rotate, the first roller brush and the second roller brush are driven to rotate towards each other.

7. The cleaning system according to claim 3, characterized in that: The at least two roller brushes include two groups, each group includes a first section roller brush and a second section roller brush, and the first section roller brush and the second section roller brush are connected in a circumferential rotation direction; The first roller brushes of the two groups are respectively connected to the first front wheel through the first transmission structure; The second roller brushes of the two groups are respectively connected to the second front wheel through the second transmission structure, wherein the first transmission structure and the second transmission structure are the same; When the first front wheel rotates, it drives the first roller brushes of the two groups to rotate in opposite directions; When the second front wheel rotates, the second roller brushes of the two groups are driven to rotate in opposite directions.

8. The cleaning system according to claim 3, wherein The walking mechanism comprises: A driving motor is arranged in the first or second roller brush, the first or second roller brush is fixedly connected to the driving motor and rotates with the driving motor, the driving motor is drivingly connected to the first or second front wheel through a first transmission structure, and the second roller brush is drivingly connected to the first or second front wheel through a second transmission structure. When the driving motor rotates, it drives the first or second roller brush and the first or second front wheel to rotate, and the rotation of the first or second front wheel drives the second or first roller brush to rotate; Or two drive motors, including a first drive motor and a second drive motor, the first drive motor is arranged in the first roller brush, the first roller brush is fixedly connected to the first drive motor and rotates with the first motor, and the second drive motor is arranged in the second roller brush, the second roller brush is fixedly connected to the second drive motor and rotates with the second motor.

9. The cleaning system according to any one of claims 5 - 8, characterized in that, The first and second transmission structures are each a series of any structure: The first type: a roller brush gear is arranged on a rotating shaft of a roller brush, the front wheel is provided with at least external teeth and internal teeth, and the roller brush gear is meshed and transmission-connected with the external teeth or the internal teeth on the front wheel; The second type: a roller brush gear is arranged on a rotating shaft of a roller brush, the front wheel is provided with at least a central tooth, the roller brush gear is meshed and transmission-connected with the central tooth on the front wheel, or the roller brush gear is meshed and transmission-connected with the central tooth on the front wheel through a transition gear; The third type: two roller brush gears, the first roller brush gear is arranged on the rotating shaft of the first roller brush or the segment of the first roller brush, the second roller brush gear is arranged on the rotating shaft of the second roller brush or the segment of the second roller brush, and the front wheel is provided with at least external teeth and internal teeth. teeth, the first roller brush gear and the second roller brush gear are respectively meshed and transmission-connected with the outer teeth and the inner teeth on the front wheel; The fourth type: two roller brush gears, the first roller brush gear is arranged on the rotating shaft of the first roller brush or the segment of the first roller brush, the second roller brush gear is arranged on the rotating shaft of the second roller brush or the segment of the second roller brush, the front wheel is provided with at least a central tooth, the first and second roller brush gears are respectively meshed and connected to the central tooth on the front wheel, wherein the first or second roller brush gear is meshed and connected to the central tooth on the front wheel through a transition gear; The fifth type is a driving gear, which is arranged on the output shaft of the driving motor. The front wheel is provided with one of external teeth, internal teeth or central teeth, and the driving gear is meshed and connected with the external teeth, internal teeth or central teeth on the front wheel.

10. The cleaning system according to claim 1, wherein: The roller brush driving source comprises: at least one roller brush motor; The at least one roller brush motor is rotationally connected to the at least two roller brushes via at least one transmission structure to drive the at least two roller brushes to rotate.

11. The cleaning system according to claim 1, characterized in that: Each roller brush comprises a rotating shaft, a shaft sleeve and blades. The shaft sleeve is sleeved on the rotating shaft. There are multiple blades, one end of which is axially and circumferentially connected to the shaft sleeve. The blades on two roller brushes rotating in opposite directions are in contact or spaced apart.

12. The cleaning system according to claim 2, characterized in that: The projection of the opening on the surface to be cleaned and the projection of the distance between the blade ends of the two roller brushes on the surface to be cleaned at least partially overlap; And the opening is further away from the front end of the cleaning device than the spacing.

13. A pool cleaning device, comprising at least one water inlet, a filtration system and a traveling mechanism, characterized in that, It further includes a cleaning system. The cleaning system includes: At least two parallel brush rollers are at least partially disposed in at least two brush roller bins provided at the bottom of the cleaning device; At least one of the water inlets is disposed between at least two of the brush roller bins and is in fluid communication with the filtration system; The at least two parallel brush rollers are respectively driven by the traveling mechanism to rotate towards each other; The at least two brush rollers include blades, and the minimum spacing between the ends of the blades on the two brush rollers is less than or equal to the width of the water inlet.

14. The cleaning device according to claim 13, wherein: The projection of the water inlet on the surface to be cleaned at least partially coincides with the projection of the spacing between the ends of the blades of the two brush rollers on the surface to be cleaned; and the water inlet is further away from the front end of the cleaning device than the spacing.

15. The cleaning device according to claim 13, characterized in that: The at least two parallel brush rollers are respectively driven by the traveling mechanism to rotate towards each other, including one of the following: driven by a single traveling wheel, or driven by two traveling wheels respectively.

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