A surface cleaning system

Abstract

The present invention relates to a surface cleaning system, comprising a surface cleaning device having a cleaning head, and a cleaning assembly for cleaning the surface cleaning device, wherein the bottom of the cleaning head is provided with two rotatable turntables distributed left and right, the turntables are provided with wipers, the cleaning head is provided with a driving assembly for driving the turntable to rotate, the cleaning assembly comprises a cleaning tank, the cleaning tank is provided with cleaning parts and cleaning liquid, the cleaning head is placed in the cleaning tank, the wipers abut against the cleaning parts, the cleaning tank is provided with a horizontal limiter, the driving assembly drives the wipers to rotate on the cleaning parts, the horizontal limiter cooperates with the cleaning head to make the cleaning head swing back and forth horizontally in the cleaning tank. The adoption of this technical solution allows the turntable to generate a certain amount of slippage in the horizontal or radial direction of the turntable when driving the wipers to scrape and clean, and the circumferential rotation cleaning and the horizontal sliding cleaning are combined to enhance the cleaning of the cleaning wipers near the rotation center area.

Description

Technical Field

[0001] The present invention relates to the field of household cleaning appliances, and in particular to a surface cleaning system for cleaning. Background Art

[0002] Mopping equipment currently on the market typically uses a turntable structure, specifically, a turntable arranged side by side at the bottom of the cleaning head, with a mop cloth placed on the turntable, which contacts the surface to be cleaned and is shaped similarly to the surface to be cleaned. However, after mopping, the user needs to manually clean the mop cloth, especially when the floor is heavily soiled. If the mop cloth is not cleaned in time, it may be difficult to clean the floor thoroughly. Manual cleaning requires touching the dirty mop cloth with hands, which is even more annoying. Moreover, the need to manually change and clean the mop cloth back and forth also reduces cleaning efficiency.

[0003] In this regard, the applicant's prior patent application disclosed a cleaning bucket for use with the mopping device. The surface cleaning device is fixedly placed in the cleaning bucket, and the rotation of the turntable drives the wiping element to rotate and scrape on the cleaning element with the rotation axis of the turntable as the rotation center for cleaning. However, in this cleaning method, the wiping element has a shorter rotation path near the rotation center, resulting in a relatively poor cleaning effect in this area compared to the outer area, which affects the overall cleaning effect. There is still room for further improvement. Summary of the Invention

[0004] The present invention aims to at least partially solve the above technical problems and provides a cleaning assembly for a mopping device.

[0005] The technical solution adopted in the present invention is as follows:

[0006] A surface cleaning system includes a surface cleaning device with a cleaning head and a cleaning assembly for cleaning the surface cleaning device, wherein the bottom of the cleaning head is provided with two rotatable turntables distributed left and right, and a wiping member is provided on the turntable, and a driving assembly for driving the turntable to rotate is provided in the cleaning head, and the cleaning assembly includes a cleaning tank, and a cleaning member and a cleaning liquid are provided in the cleaning tank. The cleaning head is placed in the cleaning tank, and the wiping member abuts against the cleaning member. The cleaning tank is provided with a horizontal limit member, and the driving assembly drives the wiping member to rotate on the cleaning member, and the horizontal limit member cooperates with the cleaning head to make the cleaning head swing back and forth horizontally in the cleaning tank.

[0007] Furthermore, the cleaning head includes a shell, and the horizontal limiting member cooperates with the shell of the cleaning head to enable the cleaning head to swing back and forth horizontally in the cleaning tank.

[0008] Furthermore, the horizontal limiting member is a side wall of the cleaning tank.

[0009] Furthermore, the horizontal limiting member cooperates with the turntable to enable the cleaning head to swing back and forth horizontally in the cleaning tank.

[0010] Furthermore, the horizontal limiting member is a boss, which extends inward from the front side wall and the rear side wall of the cleaning tank respectively. The boss is provided with oppositely arranged limiting surfaces, which are used to limit the front and rear sides of the shell.

[0011] Furthermore, the distance between the limiting surface and the shell is smaller than the distance between the turntable and the cleaning tank in the front-to-back direction.

[0012] Furthermore, the cleaning tank is provided with a drain outlet, which is provided at the transition portion between the boss and the rear side wall of the cleaning tank, and the rotation direction of the turntable in the forward cleaning direction of the surface cleaning device is relatively inward.

[0013] Furthermore, the cleaning member is provided with a scraping member for contacting with the wiping member, and the scraping members corresponding to the two turntables are asymmetrically arranged with respect to the central axis of the cleaning head.

[0014] Furthermore, a projection of the turntable in the vertical direction is exposed outside the housing, and a diameter of the wiping member is larger than a diameter of the turntable.

[0015] Furthermore, the cleaning device also includes a rotatable valve stem, which includes a driving end and a driven end. A sewage outlet is provided at the bottom of the cleaning tank. The driven end of the valve stem is provided with a valve body for closing the sewage outlet. The driving end of the valve stem abuts against the mop. When the turntable reverses, the mop drives the valve stem to rotate to open the sewage outlet.

[0016] The beneficial effects of this technical solution include:

[0017] By providing a horizontal stopper within the cleaning tank, which cooperates with the cleaning head, the cleaning head can swing back and forth horizontally within the cleaning tank. In addition to rotating and scraping the cleaning element around the rotating axis of the turntable, the cleaning wiper on the cleaning head also experiences a certain amount of slippage in the horizontal or radial directions of the turntable. This allows for a combination of circumferential rotational cleaning and horizontal sliding cleaning. This increases the scraping and cleaning path of the cleaning wiper near the center of rotation and strengthens the cleaning intensity in this area, thereby enhancing the overall cleaning effect of the cleaning wiper. Furthermore, as the cleaning head swings within the cleaning tank, it causes the cleaning water flow to fluctuate within the tank, thereby flushing and cleaning dirt from the wiper. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings in the specification as part of the technical solution of this application are used to further understand the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0019] Figure 1 It is a structural diagram of the floor cleaning device and cleaning components of the present invention;

[0020] Figure 2 This is a schematic diagram of a state of the cleaning head of the present invention when it is swinging in the cleaning tank;

[0021] Figure 3 This is a schematic diagram of another state of the cleaning head of the present invention when it is swinging in the cleaning tank;

[0022] Figure 4 This is another schematic diagram of the cleaning head of the present invention when it swings in the cleaning tank;

[0023] Figure 5 This is a schematic diagram of a state of the cleaning head in Example 1 when it is swinging in the cleaning tank;

[0024] Figure 6 This is a schematic diagram of a state of the cleaning head in Example 1 when it is swinging in the cleaning tank;

[0025] Figure 7 This is another schematic diagram of the cleaning head in the first embodiment when it is swinging in the cleaning tank;

[0026] Figure 8 This is a schematic structural diagram of the cleaning element in the second embodiment;

[0027] Figure 9 yes Figure 8 A partial enlarged schematic diagram of part A in the middle;

[0028] Figure 10 This is a schematic diagram of the valve stem structure in Example 3;

[0029] Figure 11 This is a schematic diagram of the top view of the cleaning assembly in Example 3;

[0030] Figure 12 yes Figure 11 Schematic diagram of the cross-sectional structure in the NN direction;

[0031] Figure 13 yes Figure 12 A partial enlarged schematic diagram of part B in the middle;

[0032] Figure 14 This is a schematic diagram of a top view of the cleaning assembly in another embodiment of the third embodiment;

[0033] Figure 15 This is a schematic diagram of the valve stem structure in another embodiment of the third embodiment;

[0034] Figure 16 yes Figure 14 A partial enlarged schematic diagram of part C in the middle. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0036] It should be noted that the described embodiments are only part of the embodiments of this application, rather than all the embodiments. The following description of at least one exemplary embodiment is actually merely illustrative and should not be regarded as a limitation of this application and its applications.

[0037] It is understood that the floor cleaning device in this embodiment may be an autonomous mobile cleaning robot that can move and clean autonomously without human intervention. The autonomous mobile cleaning robot may have sweeping and vacuuming functions. Specifically, the mopping robot may also have a base station for docking and charging.

[0038] Combine Figures 1 to 4 As shown, the surface cleaning device 100 exemplarily provided in the figure includes a handle 110, a pivot assembly 130 and a cleaning head 120, wherein the handle 110 is hinged to the rear end of the cleaning head 120 through the pivot assembly 130, and the cleaning head 120 includes a housing 121, a drive assembly (not shown in the figure) is provided in the housing 121, and a turntable 122 is provided at the bottom of the cleaning head 120, and the output shaft of the drive assembly extends from the bottom of the housing 121 and is fixedly connected to the turntable 122. There are two turntables 122 in this embodiment, which are arranged on the left and right sides of the bottom of the cleaning head 120. A wiper is provided at the bottom of the turntable 122, and the wiper is fixed or removably arranged at the bottom of the turntable 122. The wiper can be made of a material with water absorption and fluff, such as a cleaning pad and a cleaning cloth, and the specific shape can be round, square or any other shape that is compatible with the shape of the turntable.

[0039] In addition, a cleaning assembly 200 for the surface cleaning device 100 is also provided. The cleaning assembly 200 includes a cleaning tank 210, which includes a horizontal limiter and a cleaning chamber for holding a cleaning liquid. A cleaning member 211 is provided in the cleaning tank 210. The cleaning member 211 can be an integral structure with the cleaning tank or a separate structure from the cleaning tank 210. After the surface cleaning device 100 completes cleaning, the cleaning head 120 of the surface cleaning device 100 is placed in the cleaning tank 210 so that the wiper abuts against the cleaning member 211. The driving device drives the turntable 122 to drive the cleaning wipe to rotate on the cleaning member 211, so that when the turntable 122 rotates, the cleaning wipe rubs against the cleaning member to clean dirt attached to the cleaning wipe. The horizontal limiter cooperates with the cleaning head 120 to cause the cleaning head 120 to swing back and forth horizontally in the cleaning tank. It is understandable that the horizontal reciprocating swing can be a reciprocating swing in the left-right direction or a reciprocating swing in the front-back direction. Figures 2 to 4 Schematic diagram of the state in which the cleaning head swings back and forth in a roughly forward and backward direction is given as an example.

[0040] In this embodiment, a horizontal stopper is provided within the cleaning tank, and the horizontal stopper cooperates with the cleaning head to allow the cleaning head to swing back and forth horizontally within the cleaning tank. In this manner, in addition to rotating and scraping the cleaning member with the rotating axis of the turntable as the center of rotation, the cleaning wiper on the cleaning head also experiences a certain amount of slippage in the horizontal or radial direction of the turntable, thereby combining circumferential rotational cleaning with horizontal sliding cleaning. This, in particular, increases the scraping and cleaning path of the cleaning wiper near the center of rotation and strengthens the cleaning intensity in this area, thereby improving the overall cleaning effect of the cleaning wiper. Furthermore, as the cleaning head swings within the cleaning tank, it causes the cleaning water flow to fluctuate within the tank, thereby also flushing and cleaning dirt from the wiper. Furthermore, as the cleaning head swings within the cleaning tank, it causes the cleaning water flow to fluctuate within the tank, thereby also flushing and cleaning dirt from the wiper.

[0041] Specifically, the driving component in this embodiment is a motor. In one optional embodiment, a motor is provided in the cleaning head, and the output shaft of the motor is output from both ends of the motor and is respectively connected to the turntables. The motor controls the two turntables to simultaneously rotate forward or reverse. In another optional embodiment, two motors are provided in the cleaning head, and the output shafts of the motors are respectively connected to the turntables. In this way, the direction of the two turntables can be controlled separately, so that when one turntable rotates, the other turntable stops; when one turntable rotates forward, the other turntable reverses, and so on, thereby meeting the actual needs of users.

[0042] Example 1:

[0043] In this embodiment, the horizontal limiter cooperates with the housing of the cleaning head 120 to enable the cleaning head to swing back and forth horizontally within the cleaning tank. Specifically, the housing 121 of the cleaning head includes a front sidewall 121a and a rear sidewall 121b, and the cleaning tank 210 includes a front sidewall 210a and a rear sidewall 210b.

[0044] In this way, the matching position of the horizontal limiter and the shell is relatively higher than the scraping surface of the wiping member and the cleaning member, preventing the cleaning head from leaving the cleaning tank, so that the cleaning head is more stable when it swings back and forth horizontally in the cleaning tank.

[0045] In one implementation of this embodiment, the horizontal limiter is a side wall of the cleaning tank. Since the side wall of the cleaning tank defines the cleaning space in the cleaning tank, by setting the side wall of the cleaning tank as a horizontal limiter, the cleaning head can be better confined to swing back and forth in the cleaning tank.

[0046] In order to further improve the cleaning effect, the gap between the side wall of the cleaning tank and the shell of the cleaning head is preferably in the range of 2 to 15 mm.

[0047] In a preferred implementation of this embodiment, the horizontal limiting member is a boss, which includes a front boss 210aa and a rear boss 210bb. The boss 210aa is approximately located on the central axis of the cleaning head in the front-to-back direction and extends inward from the front sidewall 210a and the rear sidewall 210b of the cleaning tank, respectively. The front boss 210aa is provided with a limiting surface S1, and the rear boss 210bb is provided with a limiting surface S2. The limiting surfaces S1 and S2 are arranged opposite each other to define the front and rear sides of the housing. It is understandable that in this embodiment, only the front boss 210aa or the rear boss 210bb can also be provided.

[0048] By configuring the horizontal limiter as a boss and providing opposing bosses on the front and rear sidewalls of the cleaning tank, the front and rear sides of the housing can be better limited, reducing the contact area between the housing and the sidewalls of the cleaning tank when the cleaning head swings, further ensuring the stability of the cleaning head during swinging. In addition, the horizontal sliding amplitude between the cleaning wipe and the cleaning member is controlled by the distance between the limit surface and the housing, preventing the cleaning turntable from hitting the sidewalls of the cleaning tank, causing the surface cleaning device to become unstable in the cleaning tank and tip over. The center of the cleaning tank is also moved closer to the middle, preventing the cleaning tank from tipping over due to the impact of the swinging cleaning head.

[0049] Furthermore, the distance between the limiting surface and the shell is smaller than the distance between the turntable and the cleaning tank in the front-to-back direction. Specifically, by making the distance between the limiting surface and the shell smaller than the distance between the turntable and the cleaning tank in the front-to-back direction, the distance between the limiting surface and the swing center of the cleaning head is closer, so that the reciprocating swing amplitude of the cleaning head in the horizontal front-to-back direction in the cleaning tank is constrained by the limiting surface, making it easier to control the reciprocating swing amplitude of the cleaning head. Figures 5 to 8 As shown, during the forward and backward swinging of the cleaning head, the front side wall 120a and the rear side wall 120b of the housing abut against the front boss 210aa or the rear boss 210bb of the cleaning tank 210 respectively.

[0050] Preferably, the cleaning member is detachably connected to the cleaning tank, and a scraping member is provided on the cleaning member. The scraping member is fixedly or movably connected to the cleaning member, and when the cleaning head of the surface cleaning device is placed in the cleaning cavity, the wiping member abuts against the scraping member and scrapes.

[0051] Furthermore, the cleaning member is provided with a scraping member for contacting with the wiping member, and the scraping members corresponding to the two turntables are asymmetrically arranged with respect to the central axis of the cleaning head.

[0052] By setting the scraping and cleaning components corresponding to the two turntables asymmetrically about the central axis of the cleaning head, the friction between the left and right turntables and the scraping and cleaning components is different during cleaning, thereby increasing the reciprocating swing of the cleaning head in the cleaning tank to improve the cleaning effect.

[0053] Furthermore, the cleaning tank 210 is provided with a drain port 212, which is provided at the transition portion between the boss and the rear side wall 210bb of the cleaning tank, and the rotation direction of the turntable is relatively inward in the forward cleaning direction of the surface cleaning device. Specifically, the rotation direction of the turntable of the cleaning tank rear side wall 210b and the rear side wall 210bb of the cleaning tank is shown in the attached figure. Figure 5 As shown by the arrow in .

[0054] In this embodiment, the drain port is located at the transition between the boss and the rear sidewall of the washing tank, and the turntable rotates relatively inward in the forward cleaning direction of the surface cleaning device. This allows the wiping elements on the turntable to absorb water while simultaneously scraping against the cleaning elements. During rotational cleaning, some of the dirty water on the wiping elements is discharged through the drain port due to the centrifugal force of the rotation, thereby achieving water level control. Furthermore, the reciprocating oscillation of the cleaning head during cleaning causes uneven water flow from the drain port on the inner wall of the washing tank, thereby increasing the resistance to water overflowing from the drain port within the washing tank, ensuring a sufficient amount of water inside the washing tank during cleaning and improving cleaning efficiency.

[0055] Furthermore, a projection of the turntable in the vertical direction is exposed outside the housing, and a diameter of the wiping member is larger than a diameter of the turntable.

[0056] On the one hand, by arranging the turntable so that the projection part in the vertical direction is exposed to the shell, the wiping area during cleaning can be increased; on the other hand, since the diameter of the wiping member is larger than the diameter of the turntable, not only can the wiping area be increased, but the cleaning head can also extend beyond the turntable part during swinging cleaning to form a buffer, thereby preventing the turntable from colliding with the side wall of the cleaning tank.

[0057] Example 2:

[0058] Combined with attachment Figure 8 、 9 As shown, the difference between this embodiment and the first embodiment is that the horizontal limit member cooperates with the turntable to enable the cleaning head to swing back and forth horizontally in the cleaning tank.

[0059] Preferably, the horizontal limit member is a limit column 211a, which is arranged on the cleaning member 211 and there are two of them. The bottom of the turntable 122 is provided with a limit groove corresponding to the limit column 211a (not shown in the figure). When the surface cleaning device is placed in the cleaning tank, the limit column extends into the limit groove for cooperation, so that the cleaning head can swing back and forth horizontally in the cleaning tank.

[0060] Example 3:

[0061] The difference between this embodiment and embodiments one and two is that the cleaning assembly in this embodiment further includes a rotatable valve stem 230, which is at least partially disposed in the cleaning tank. The valve stem 230 includes a driving end 231 and a driven end 232. A sewage outlet 213 is provided at the bottom of the cleaning chamber. The driven end 232 of the valve stem 230 is provided with a valve body for closing the sewage outlet 213. The driving end 231 of the valve stem 230 abuts against the mop. When the turntable reverses, the mop drives the valve stem 230 to rotate to open the sewage outlet 213. Specifically, in this embodiment, the turntable on the left side of the cleaning head is arranged corresponding to the valve stem 230. When the turntable on the left side of the cleaning head is reversed, the mop drives the valve stem 230 to rotate to open the sewage outlet 213. When the turntable on the left side of the cleaning head rotates forward, the driving end 231 of the valve stem 230 is subjected to the horizontal force of the mop, causing it to move in the direction of closing the sewage outlet 213. After closing the sewage outlet 213, the valve stem 230 slips relative to the mop, causing the valve body to further press and close the sewage outlet 213.

[0062] Specifically, in this embodiment, the driving end 231 of the valve stem that abuts against the mop also constitutes at least a part of the scraping component.

[0063] In this embodiment, the turntable rotates forward during cleaning, and the valve body at the driven end of the valve stem closes the drain outlet. As the turntable rotates, the mop contacts the cleaning water within the cleaning chamber and scrapes against the rotating cleaning components, removing dirt adhering to the mop. Once cleaning is complete, the turntable reverses, and the mop drives the valve stem, automatically opening the drain outlet and draining the wastewater out of the cleaning tank. Throughout this process, the valve stem, which contacts the mop, controls the opening and closing of the drain outlet directly through the forward and reverse rotation of the turntable. This eliminates the need for manual drainage by the user, automating the cleaning process and improving the user experience.

[0064] Preferably, the valve stem 230 is entirely located in the cleaning tank, and the valve stem 230 is rotatably connected to the cleaning tank 210. Specifically, a raised valve seat 214 is provided on the inner bottom wall of the cleaning tank, and the valve stem 230 is pivotally connected to the valve seat 214.

[0065] In an optional manner of this embodiment, the pivot center axis of the valve stem 230 is substantially perpendicular to the horizontal plane so that the valve body moves horizontally to open or close the sewage outlet.

[0066] Preferably, in this embodiment, the pivot center axis of the valve stem 230 is substantially parallel to the horizontal plane so that the valve body moves up and down to open or close the sewage outlet 213 .

[0067] In this embodiment, a hollow through hole is further provided on the cleaning member 210 , and the driving end 231 of the valve stem 230 passes through the through hole and is higher than the scraping member.

[0068] Combine Figures 2 to 6 In one aspect of this embodiment, the cleaning assembly defines a first plane passing through the pivot axis oo and perpendicular to the horizontal plane, and the driving end 231 and the driven end 232 of the valve body 230 are located on opposite sides of the first plane. Specifically, the angle between the power arm of the driving end 231 of the valve stem 230 and the resistance arm of the driven end 232 is an obtuse angle.

[0069] Preferably, in this embodiment, the cleaning device has a first plane passing through the pivot center axis oo and perpendicular to the horizontal plane, and the driving end 231 and the driven end 232 of the valve stem 230 are located on the same side of the first plane.

[0070] When a mop is placed on the cleaning assembly, the driving end of the valve stem abuts against the mop, exerting downward force, allowing the valve body to better seal the drain outlet. Furthermore, the valve stem's overall center of gravity is positioned closer to the drain outlet, allowing it to return to its original position and seal the drain outlet under the force of gravity when no surface cleaning device is placed, resulting in a simple and reliable structure.

[0071] When the bottom cleaning device is not placed on the cleaning assembly, it is necessary to keep the valve body closed to the drain outlet so that the user can add cleaning water directly to the cleaning chamber before use. For this purpose, a valve stem reset member is also provided on the cleaning bucket so that it can automatically reset when cleaning is completed.

[0072] In one aspect of this embodiment, a torsion spring 216 is provided on the valve seat 212 , and the torsion spring 216 enables the valve stem 230 to return to close the sewage outlet 213 .

[0073] In this embodiment, the pivot axis oo of the valve stem 230 passes through the rotation axis of the turntable. This ensures that the entire lever arm during valve stem rotation is perpendicular to the radius from the valve stem at the mop contact position to the rotation center, thereby reducing force losses in other directions when driving the valve stem to rotate and improving the reliability of the drain opening.

[0074] It can be understood that when the surface cleaning device is a self-moving robot, the cleaning component can be independent of the charging base station or be arranged on the base station, so that the cleaning component automatically parks at the corresponding position of the base station after completing the ground cleaning work, and performs automatic cleaning while charging.

[0075] In the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. Terms such as "installed", "connected", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. The orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

Claims

1. A surface cleaning system, comprising a surface cleaning device having a cleaning head, and a cleaning assembly for cleaning the surface cleaning device, wherein the bottom of the cleaning head is provided with two rotatable turntables distributed left and right, and the turntables are provided with wiping members, the cleaning head is provided with a drive assembly for driving the turntables to rotate, the cleaning assembly includes a cleaning tank, and the cleaning tank is provided with cleaning members and cleaning liquid, characterized in that: The cleaning head is placed in the cleaning tank, the wiping member abuts against the cleaning member, the cleaning tank is provided with a horizontal limit member, the driving assembly drives the wiping member to rotate on the cleaning member, the horizontal limit member cooperates with the cleaning head to make the cleaning head swing horizontally back and forth in the cleaning tank, and the cleaning tank is also provided with a drain outlet, the drain outlet is provided at the transition part between the horizontal limit member and the rear side wall of the cleaning tank, the cleaning assembly also includes a sewage outlet and a rotatable valve stem, the valve stem has a driving end and a driven end having a valve body for closing the sewage outlet, the cleaning member reverses to drive the valve stem to rotate to open the sewage outlet, and the cleaning member rotates forward to move the valve stem in the direction of closing the sewage outlet to close and press the sewage outlet.

2. The surface cleaning system according to claim 1, wherein The cleaning head includes a shell, and the horizontal limiting member cooperates with the shell of the cleaning head to enable the cleaning head to swing back and forth horizontally in the cleaning tank.

3. The surface cleaning system according to claim 2, wherein: The horizontal limiting member is a side wall of the cleaning tank.

4. The surface cleaning system according to claim 1, wherein: The horizontal limiting member cooperates with the turntable to enable the cleaning head to swing back and forth horizontally in the cleaning tank.

5. The surface cleaning system according to claim 2 or 3, characterized in that The horizontal limiting member is a boss, which extends inward from the front side wall and the rear side wall of the cleaning tank respectively. The boss is provided with oppositely arranged limiting surfaces, which are used to limit the front and rear sides of the shell.

6. The surface cleaning system according to claim 5, wherein: The distance between the limiting surface and the shell is smaller than the distance between the turntable and the cleaning tank in the front-to-back direction.

7. The surface cleaning system according to claim 5, wherein: The cleaning tank is also provided with a drain outlet, which is provided at the transition portion between the boss and the rear side wall of the cleaning tank, and the rotation direction of the turntable in the forward cleaning direction of the surface cleaning device is relatively inward.

8. The surface cleaning system according to any one of claims 1 to 4, characterized in that The cleaning member is provided with a scraping component for contacting with the wiping member, and the scraping components corresponding to the two rotating disks are asymmetrically arranged with respect to the central axis of the cleaning head.

9. The surface cleaning system according to any one of claims 2 to 4, wherein: A projection portion of the turntable in a vertical direction is exposed outside the housing, and a diameter of the wiping member is larger than a diameter of the turntable.

10. The surface cleaning system according to any one of claims 1 to 4, characterized in that The cleaning device also includes a rotatable valve stem, which includes a driving end and a driven end. A sewage outlet is provided at the bottom of the cleaning tank. The driven end of the valve stem is provided with a valve body for closing the sewage outlet. The driving end of the valve stem abuts against the mop. When the turntable reverses, the mop drives the valve stem to rotate to open the sewage outlet.

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