Surface cleaning device

Abstract

The surface cleaning device provided by the embodiment of the invention comprises a shell, the bottom of the shell is provided with a third concave cavity, and the third concave cavity is used for defining a third sealed space with a to-be-cleaned surface; the first cleaning unit is arranged in the third concave cavity, a first concave cavity is formed in the bottom of the first cleaning unit, and the first concave cavity is used for defining a first sealed space with the surface to be cleaned; the second cleaning unit is arranged in the third concave cavity, a second concave cavity is formed in the bottom of the second cleaning unit, and a second sealed space is defined between the second concave cavity and the surface to be cleaned; the driving unit is used for driving the first cleaning unit and the second cleaning unit to rotate relative to the shell; and the vacuum unit is used for communicating the first sealed space with the second sealed space, so that negative pressure is generated in the first sealed space, the second sealed space and the third sealed space. According to the surface cleaning device, the pressure between the surface cleaning device and the to-be-cleaned surface can be increased, and the cleaning effect of the surface cleaning device is improved.

Description

Technical Field

[0001] This application relates to the field of cleaning technology, and more specifically to a surface cleaning device. Background Technology

[0002] A robotic vacuum cleaner is a household appliance that provides cleaning functions. It typically has a walking unit and a cleaning unit on its bottom. The walking unit propels the robot across the surface to be cleaned, while the cleaning unit performs the cleaning operation, thus cleaning the surface.

[0003] However, the pressure between the robot vacuum cleaner and the surface to be cleaned in the current technology is relatively small, which makes it impossible to remove some stubborn stains on the surface and affects the cleaning effect.

[0004] It should be noted that the information disclosed in the background section of this application is intended only to enhance the understanding of the general background of this application, and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] In view of this, this application provides a surface cleaning device to solve the problem in the prior art where the pressure between the robot vacuum cleaner and the surface to be cleaned is too low, resulting in some stubborn stains on the surface to be cleaned not being removed, thus affecting the cleaning effect.

[0006] In a first aspect, embodiments of this application provide a surface cleaning device, comprising:

[0007] The housing has a third recess at its bottom, which defines a third sealed space between itself and the surface to be cleaned.

[0008] A first cleaning unit is disposed in the third recess, and the bottom of the first cleaning unit is provided with a first recess, which is used to define a first sealing space between itself and the surface to be cleaned.

[0009] The second cleaning unit is disposed in the third cavity. The bottom of the second cleaning unit is provided with a second cavity, which is used to define a second sealing space between itself and the surface to be cleaned.

[0010] A drive unit is used to drive the first cleaning unit and the second cleaning unit to rotate relative to the housing;

[0011] A vacuum unit is used to connect the first sealed space and the second sealed space, thereby generating negative pressure in the first sealed space, the second sealed space and the third sealed space.

[0012] One possible implementation also includes:

[0013] A third cleaning unit is arranged around the third cavity.

[0014] In one possible implementation, the driving unit includes:

[0015] A first drive subunit and a first transmission subunit, wherein the first drive subunit is coupled to the first cleaning unit through the first transmission subunit, and the first drive subunit is used to drive the first cleaning unit to rotate relative to the housing through the first transmission subunit;

[0016] The second drive subunit and the second transmission subunit are coupled to the second cleaning unit through the second transmission subunit. The second drive subunit is used to drive the second cleaning unit to rotate relative to the housing through the second transmission subunit.

[0017] In one possible implementation, the driving unit includes:

[0018] The system comprises a third drive subunit, a third transmission subunit, and a fourth transmission subunit. The third drive subunit is coupled to the first cleaning unit via the third transmission subunit, and the third drive subunit is used to drive the first cleaning unit to rotate relative to the housing via the third transmission subunit. The third drive subunit is coupled to the second cleaning unit via the fourth transmission subunit, and the third drive subunit is used to drive the second cleaning unit to rotate relative to the housing via the fourth transmission subunit.

[0019] In one possible implementation, the vacuum unit includes:

[0020] The first vacuum subunit is used to connect the first sealed space, thereby generating a negative pressure in the first sealed space.

[0021] The second vacuum subunit is used to connect the second sealed space, thereby generating a negative pressure within the second sealed space.

[0022] In one possible implementation, the vacuum unit includes:

[0023] First air valve;

[0024] Second air valve;

[0025] The third vacuum subunit is connected to the first space through the first gas valve and to the second space through the second gas valve.

[0026] Specifically, when the first air valve is opened, the third vacuum subunit is connected to the first space, causing the first space to generate negative pressure; when the second air valve is opened, the third vacuum subunit is connected to the second space, causing the second space to generate negative pressure.

[0027] One possible implementation also includes:

[0028] A cleaning fluid spraying unit is used to spray cleaning fluid within a set spraying area, which is located within the third sealed space.

[0029] In one possible implementation, the spraying area is located within the third sealed space and outside the first and second sealed spaces.

[0030] One possible implementation also includes:

[0031] The wastewater collection unit has an air inlet connected to the first cavity and / or the second cavity, and an air outlet connected to the vacuum unit. The wastewater collection unit is used to collect wastewater on the surface to be cleaned.

[0032] In one possible implementation, the wastewater collection unit includes:

[0033] The first sewage collection subunit has an air inlet connected to the first cavity and an air outlet connected to the vacuum unit. The first sewage collection subunit is used to collect sewage entering the first sealed space.

[0034] The second sewage collection subunit has an air inlet connected to the second cavity and an air outlet connected to the vacuum unit. The second sewage collection subunit is used to collect sewage entering the second sealed space.

[0035] In this embodiment, a vacuum unit is provided on the surface cleaning device, and a first sealing space, a second sealing space and a third sealing space are provided at the bottom of the surface cleaning device. The vacuum unit provides negative pressure to the first sealing space, the second sealing space and the third sealing space, thereby increasing the pressure between the surface cleaning device and the surface to be cleaned and improving the cleaning effect of the surface cleaning device. Attached Figure Description

[0036] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 A cross-sectional view of a surface cleaning device provided in an embodiment of this application;

[0038] Figure 2 An exploded view of a surface cleaning device provided in an embodiment of this application;

[0039] Figure 3 This is a schematic diagram of the bottom structure of a surface cleaning device provided in an embodiment of this application;

[0040] Figure 4 A schematic diagram of the bottom structure of another surface cleaning device provided in this application embodiment;

[0041] Figure 5 A simplified diagram of a surface cleaning device provided in an embodiment of this application;

[0042] Figure 6 Provided for the embodiments of this application Figure 5 A schematic diagram of the movement of the surface cleaning device shown.

[0043] The symbols in the diagram represent: 110-housing, 120-first cleaning unit, 121-first cleaning unit support, 122-first cleaning component, 130-second cleaning unit, 131-second cleaning unit support, 132-second cleaning component, 140-vacuum unit, 141-fan, 142-air guide shroud, 151-first drive subunit, 152-second drive subunit, 161-first transmission subunit, 162-second transmission subunit, 171-first cavity, 172-second cavity, 173-third cavity, 180-third cleaning unit, 190-connecting arm, 191-first pivot, 192-second pivot. Detailed Implementation

[0044] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0045] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0046] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0047] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0048] A robotic vacuum cleaner is a household appliance that provides cleaning functions. It typically has a walking unit and a cleaning unit on its underside. The walking unit propels the robot across the surface to be cleaned, while the cleaning unit performs the cleaning operation. However, in existing technologies, the pressure between the cleaning unit and the surface is relatively low, resulting in some stubborn stains remaining unremoved and affecting the cleaning effect.

[0049] In related technologies, to increase the pressure between the cleaning unit and the surface to be cleaned, a drive motor is installed at the bottom of the robot vacuum cleaner. The drive motor drives the cleaning unit to rise and fall, thereby adjusting the pressure between the cleaning unit and the surface to be cleaned. However, this control scheme is complex in structure and has limited effect on increasing the pressure between the cleaning unit and the surface to be cleaned (the maximum pressure is the robot vacuum cleaner's own weight).

[0050] To address the aforementioned issues, this application provides a surface cleaning device. The surface cleaning device is equipped with a vacuum unit, and a first sealing space, a second sealing space, and a third sealing space are provided at the bottom of the surface cleaning device. The vacuum unit provides negative pressure to the first sealing space, the second sealing space, and the third sealing space, thereby increasing the pressure between the surface cleaning device and the surface to be cleaned and improving the cleaning effect of the surface cleaning device.

[0051] See Figure 1 See also: A cross-sectional view of a surface cleaning device provided in an embodiment of this application; Figure 2 This is an exploded view of a surface cleaning device provided in an embodiment of this application. Figure 1 and combined Figure 2As shown, the surface cleaning device includes a housing 110. A first cleaning unit 120 and a second cleaning unit 130 are located at the bottom of the housing 110. A driving unit is located inside the housing 110, which can drive the first cleaning unit 120 and the second cleaning unit 130 to rotate relative to the housing 110, i.e., to rotate relative to the surface to be cleaned. It can be understood that when the first cleaning unit 120 and the second cleaning unit 130 rotate, the surface to be cleaned provides a frictional force to the first cleaning unit 120 and the second cleaning unit 130 in the opposite direction of rotation, thereby enabling the surface cleaning device to move on the surface to be cleaned. The specific working principle of the first cleaning unit 120 and the second cleaning unit 130 driving the surface cleaning device to move is described in detail below.

[0052] It should be further noted that, since the first cleaning unit 120 and the second cleaning unit 130 can drive the surface cleaning device to move on the surface to be cleaned, the first cleaning unit 120 and the second cleaning unit 130 can also be understood as "moving units". In addition, the surface to be cleaned in this application embodiment may be a wall, glass, ceiling, etc., in addition to the ground. This application embodiment does not impose specific limitations on the working scenario of the surface cleaning device.

[0053] In one possible implementation, the first cleaning unit 120 includes a first cleaning unit support 121 and a first cleaning component 122, with the first cleaning component 122 disposed at the bottom of the first cleaning unit support 121. The first cleaning component 122 can be made of a material with wiping and cleaning functions, such as a rag. When the first cleaning unit support 121 rotates, it can drive the first cleaning component 122 to wipe the surface to be cleaned, thereby achieving cleaning of the surface. The second cleaning unit 130 includes a second cleaning unit support 131 and a second cleaning component 132, with the second cleaning component 132 disposed at the bottom of the second cleaning unit support 131. The second cleaning component 132 can also be made of a material with wiping and cleaning functions, such as a rag. When the second cleaning unit support 131 rotates, it can drive the second cleaning component 132 to wipe the surface to be cleaned, thereby achieving cleaning of the surface.

[0054] Furthermore, the first cleaning component 122 can be detachably mounted at the bottom of the first cleaning unit bracket 121 so that the user can clean the first cleaning component 122. Similarly, the second cleaning component 132 can also be detachably mounted at the bottom of the second cleaning unit bracket 131.

[0055] Please continue reading. Figure 1 and Figure 2In this embodiment, the bottom of the first cleaning unit 120 is provided with a first recess 171, which defines a first sealed space between itself and the surface to be cleaned; the bottom of the second cleaning unit 130 is provided with a second recess 172, which defines a second sealed space between itself and the surface to be cleaned. A vacuum unit 140 is also provided inside the housing 110, and the vacuum unit 140 communicates with the first and second sealed spaces. Specifically, the vacuum unit 140 includes a fan 141 (or a vacuum pump or other vacuum device) and a guide shroud 142. The guide shroud 142 is fastened to the housing 110, forming a fan 141 receiving cavity between the guide shroud 142 and the housing 110, and the fan 141 is disposed within the fan 141 receiving cavity. This fan 141 receiving cavity communicates with the first recess 171 at the bottom of the first cleaning unit 120 and the second recess 172 at the bottom of the second cleaning unit 130, respectively. When the fan 141 operates, a negative pressure is generated within the fan 141's accommodating cavity, which in turn creates negative pressure within the first and second sealing spaces, causing the surface cleaning device to adhere to the surface to be cleaned. Figure 1 The shaded area represents the negative pressure zone of the surface cleaning device. This means that when the surface cleaning device adheres to the surface to be cleaned, atmospheric pressure increases the pressure between the device and the surface, thereby improving the cleaning effect, especially for effectively removing stubborn stains.

[0056] See Figure 3 This is a schematic diagram of the bottom structure of a surface cleaning device provided in an embodiment of this application; see also Figure 4 This is a schematic diagram of the bottom structure of another surface cleaning device provided in an embodiment of this application. Figure 3 and combined Figure 4As shown, a third recess 173 is also provided at the bottom of the housing 110. The first cleaning unit 120 and the second cleaning unit 130 are located within the third recess 173, that is, the first recess 171 at the bottom of the first cleaning unit 120 and the second recess 172 at the bottom of the second cleaning unit 130 are located within the third recess 173. The third recess 173 is used to define a third sealed space between itself and the surface to be cleaned. It can be understood that the first sealed space and the second sealed space are located within the third sealed space. When the vacuum unit 140 is working, negative pressure is generated in the first sealed space and the second sealed space. Due to the negative pressure generated in the first sealed space and the second sealed space, the air pressure in the third sealed space is greater than that in the first sealed space and the second sealed space. Therefore, air in the third sealed space enters the first sealed space through the gap between the first vacuum unit 140 and the surface to be cleaned, and enters the second sealed space through the gap between the second vacuum unit 140 and the surface to be cleaned, thereby causing negative pressure to be generated in the third sealed space. In other words, when the vacuum unit 140 is working, negative pressure will be generated in the first sealed space, the second sealed space and the third sealed space. Under normal circumstances, the air pressure in the third sealed space is greater than the air pressure in the first sealed space and the second sealed space.

[0057] In this embodiment, since the first and second sealed spaces are entirely within a negative pressure environment (the third sealed space), even if the first cleaning unit 120 or the second cleaning unit 130 malfunctions and causes leakage in the first or second sealed space, it will not immediately lose pressure, thereby improving the reliability of the surface cleaning device. Furthermore, because the third sealed space has a larger area, a larger negative pressure area can be provided for the surface cleaning device, thereby increasing the adsorption force of the surface cleaning device, i.e., increasing the pressure between the surface cleaning device and the surface to be cleaned.

[0058] In one possible implementation, a third cleaning unit 180 is further provided at the bottom of the surface cleaning device, which surrounds the third cavity 173. On the one hand, the third cleaning unit 180 can improve the sealing effect of the third sealed space; on the other hand, the third cleaning unit 180 can provide a larger wiping area, thereby improving the cleaning efficiency of the surface cleaning device.

[0059] Please continue reading. Figure 1 and Figure 2In this embodiment, the driving unit includes a first driving subunit 151 and a first transmission subunit 161, as well as a second driving subunit 152 and a second transmission subunit 162. The first driving subunit 151 is coupled to the first cleaning unit 120 via the first transmission subunit 161, and the first driving subunit 151 drives the first cleaning unit 120 to rotate relative to the housing 110 via the first transmission subunit 161. The second driving subunit 152 is coupled to the second cleaning unit 130 via the second transmission subunit 162, and the second driving subunit 152 drives the second cleaning unit 130 to rotate relative to the housing 110 via the second transmission subunit 162. In other words, in this embodiment, the first cleaning unit 120 and the second cleaning unit 130 are driven to rotate by two driving subunits respectively.

[0060] In some possible implementations, the first cleaning unit 120 and the second cleaning unit 130 can be driven to rotate by the same driving subunit. Specifically, the driving unit includes a third driving subunit, a third transmission subunit, and a fourth transmission subunit (not shown in the figure). The third driving subunit is coupled to the first cleaning unit 120 via the third transmission subunit, and is used to drive the first cleaning unit 120 to rotate relative to the housing 110 via the third transmission subunit; the third driving subunit is coupled to the second cleaning unit 130 via the fourth transmission subunit, and is used to drive the second cleaning unit 130 to rotate relative to the housing 110 via the fourth transmission subunit.

[0061] In practice, the air pressure in the first sealed space and the second sealed space may need to be controlled separately, that is, the air pressure in the first sealed space and the second sealed space are different. To achieve this, embodiments of this application provide two implementation schemes.

[0062] First, negative pressure is generated in the first sealed space and the second sealed space respectively through two vacuum subunits. Specifically, the vacuum unit 140 includes a first vacuum subunit and a second vacuum subunit. The first vacuum subunit is used to connect the first sealed space, thereby generating negative pressure in the first sealed space; the second vacuum subunit is used to connect the second sealed space, thereby generating negative pressure in the second sealed space.

[0063] Second, a vacuum subunit provides negative pressure, and air valves control the air pressure in the first and second sealed spaces respectively. Specifically, the vacuum unit 140 includes a first air valve, a second air valve, and a third vacuum subunit. The third vacuum subunit is connected to the first space via the first air valve and to the second space via the second air valve. When the first air valve is open, the third vacuum subunit is connected to the first space, creating negative pressure in the first space; when the second air valve is open, the third vacuum subunit is connected to the second space, creating negative pressure in the second space.

[0064] To further improve the cleaning effect of the surface cleaning device, in one possible implementation, the surface cleaning device is further equipped with a cleaning liquid spraying unit (not shown in the figure). This cleaning liquid spraying unit is used to spray cleaning liquid within a set spraying area located within a third sealed space. In related technologies, to prevent the cleaning liquid from flowing or splashing into areas not covered by the cleaning unit, thus causing secondary contamination of the surface to be cleaned, the spray volume of the cleaning liquid is usually controlled. However, too small a spray volume of cleaning liquid will reduce the cleaning effect of the surface cleaning device. In this embodiment, since the spraying area of ​​the cleaning liquid is located within the third sealed space, which is a closed space (sealed by the third cleaning unit 180), even increasing the spray volume of the cleaning liquid will not cause secondary contamination. That is to say, in this embodiment, the spray volume of the cleaning liquid can be increased to improve the cleaning effect without causing secondary contamination.

[0065] As mentioned above, the air pressure in the third sealed space is higher than that in the first and second sealed spaces, so the airflow flows from the third sealed space into the first and second sealed spaces. If the cleaning fluid is sprayed into the first and / or second sealed spaces, the cleaning fluid is confined within the first and / or second sealed spaces due to the airflow (the cleaning fluid cannot flow to the outside of the first and / or second sealed spaces), resulting in the area between the outer edge of the first and second sealed spaces and the inner edge of the third sealed space not being effectively wetted by the cleaning fluid, thus reducing the cleaning effect.

[0066] To avoid the aforementioned problems, in one possible implementation, the spraying area is located within the third sealed space and outside the first and second sealed spaces. That is, the cleaning fluid is sprayed in the area between the outer edges of the first and second sealed spaces and the inner edge of the third sealed space. Under the influence of airflow, the cleaning fluid located outside the first and second sealed spaces gradually converges towards them, thereby ensuring that the cleaning fluid is evenly coated within the third sealed space, improving the cleaning effect.

[0067] In a specific implementation, the cleaning fluid spraying unit includes a cleaning fluid container and a nozzle. The cleaning fluid container is used to hold the cleaning fluid, and the nozzle is used to spray the cleaning fluid onto the spraying area. The cleaning fluid can be water or an aqueous solution containing cleaning agents or disinfectants, etc., and this application embodiment does not impose specific limitations on this.

[0068] Understandably, if the amount of cleaning fluid sprayed is large, a significant amount of cleaning fluid may accumulate in the third sealed space, potentially affecting the operation of the surface cleaning device. To address this issue, in one possible implementation, the surface cleaning device is further equipped with a wastewater collection unit (not shown in the figure). The air inlet of the wastewater collection unit is connected to the first cavity 171 and / or the second cavity 172, and the air outlet of the wastewater collection unit is connected to the vacuum unit 140.

[0069] Because the air pressure is lower in the first and second sealed spaces, sewage tends to converge into them. Furthermore, the sewage entering the first and second sealed spaces is forced into the sewage collection unit by the airflow through the air inlet. It should be noted that the sewage collection unit is equipped with a filter device that removes sewage from the airflow, allowing the airflow to exit through the air outlet and storing the sewage within the unit, thus achieving sewage collection.

[0070] In one possible implementation, a sewage collection subunit can be provided for both the first and second sealed spaces to collect sewage from each space. Specifically, the sewage collection unit includes a first sewage collection subunit and a second sewage collection subunit. The air inlet of the first sewage collection subunit is connected to the first cavity 171, and the air outlet of the first sewage collection subunit is connected to the vacuum unit 140. The first sewage collection subunit is used to collect sewage entering the first sealed space. The air inlet of the second sewage collection subunit is connected to the second cavity 172, and the air outlet of the second sewage collection subunit is connected to the vacuum unit 140. The second sewage collection subunit is used to collect sewage entering the second sealed space.

[0071] In practical applications, it's possible that one wastewater collection subunit may have excessive wastewater while another has insufficient wastewater. Understandably, if either wastewater collection subunit reaches its maximum capacity, the surface cleaning device will be unable to continue operating, and the user will need to empty the wastewater from that subunit. To maximize the continuous operating time of the surface cleaning device, one possible implementation involves placing a connector between the first and second wastewater collection subunits, allowing the collected wastewater to be stored evenly in both units.

[0072] To facilitate understanding, the working principle of the surface cleaning device is explained below.

[0073] See Figure 5This is a simplified diagram of a surface cleaning device provided in an embodiment of this application. The surface cleaning device includes a first cleaning unit 120, which defines a first sealed space between itself and the surface to be cleaned. When a negative pressure is generated within the first sealed space, the first cleaning unit 120 can be adsorbed onto the surface to be cleaned. A second cleaning unit 130 defines a second sealed space between itself and the surface to be cleaned. When a negative pressure is generated within the second sealed space, the second cleaning unit 130 can be adsorbed onto the surface to be cleaned. A connecting arm 190 (the housing 110 in the above embodiment implements the related functions of the connecting arm 190), the first end of the connecting arm 190 is connected to the first cleaning unit 120 via a first pivot 191, and the second end of the connecting arm 190 is connected to the second cleaning unit 130 via a second pivot 192. A driving unit is used to drive the first cleaning unit 120 to rotate relative to the second cleaning unit 130, and to drive the second cleaning unit 130 to rotate relative to the first cleaning unit 120, thereby driving the surface cleaning device to move on the surface to be cleaned. It is understood that in this embodiment, the first cleaning unit 120 and the second cleaning unit 130 are simultaneously equivalent to the walking units of the surface cleaning device.

[0074] See Figure 6 Provided for the embodiments of this application Figure 5 A schematic diagram of the movement of the surface cleaning device shown. Figure 6 As shown, in the initial position, the first cleaning unit 120 is located at position P1, and the second cleaning unit 130 is located at position P2. The second cleaning unit 130 is kept stationary, while the first cleaning unit 120 rotates relative to the second cleaning unit 130 along direction T1, reaching position P3. The first cleaning unit 120 is then kept stationary, while the second cleaning unit 130 rotates relative to the first cleaning unit 120 along direction T2, reaching position P4. This process continues, with the first cleaning unit 120 and the second cleaning unit 130 moving alternately, enabling the surface cleaning device to move across the surface to be cleaned.

[0075] In this application embodiment, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent the existence of A alone, the simultaneous existence of A and B, or the existence of B alone. A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, and c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0076] Those skilled in the art will recognize that the units and algorithm steps described in the embodiments disclosed herein can be implemented using electronic hardware, computer software, or a combination of electronic hardware and software. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0077] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0078] In the several embodiments provided in this application, any function, if implemented as a software functional unit and sold or used as an independent product, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0079] The above description is merely a specific embodiment of this application. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application. The protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A surface cleaning device, characterized in that, include: The housing has a third recess at its bottom, which defines a third sealed space between itself and the surface to be cleaned. A first cleaning unit is disposed in the third recess, and the bottom of the first cleaning unit is provided with a first recess, which is used to define a first sealing space between itself and the surface to be cleaned. The second cleaning unit is disposed in the third cavity. The bottom of the second cleaning unit is provided with a second cavity, which is used to define a second sealing space between itself and the surface to be cleaned. A drive unit is used to drive the first cleaning unit and the second cleaning unit to rotate relative to the housing; A vacuum unit is used to connect the first sealed space and the second sealed space, thereby generating negative pressure in the first sealed space, the second sealed space and the third sealed space.

2. The surface cleaning device according to claim 1, characterized in that, Also includes: A third cleaning unit is arranged around the third cavity.

3. The surface cleaning device according to claim 1, characterized in that, The driving unit includes: A first drive subunit and a first transmission subunit, wherein the first drive subunit is coupled to the first cleaning unit through the first transmission subunit, and the first drive subunit is used to drive the first cleaning unit to rotate relative to the housing through the first transmission subunit; The second drive subunit and the second transmission subunit are coupled to the second cleaning unit through the second transmission subunit. The second drive subunit is used to drive the second cleaning unit to rotate relative to the housing through the second transmission subunit.

4. The surface cleaning device according to claim 1, characterized in that, The driving unit includes: The system comprises a third drive subunit, a third transmission subunit, and a fourth transmission subunit. The third drive subunit is coupled to the first cleaning unit via the third transmission subunit, and the third drive subunit is used to drive the first cleaning unit to rotate relative to the housing via the third transmission subunit. The third drive subunit is coupled to the second cleaning unit via the fourth transmission subunit, and the third drive subunit is used to drive the second cleaning unit to rotate relative to the housing via the fourth transmission subunit.

5. The surface cleaning device according to claim 1, characterized in that, The vacuum unit includes: The first vacuum subunit is used to connect the first sealed space, thereby generating a negative pressure in the first sealed space. The second vacuum subunit is used to connect the second sealed space, thereby generating a negative pressure within the second sealed space.

6. The surface cleaning device according to claim 1, characterized in that, The vacuum unit includes: First air valve; Second air valve; The third vacuum subunit is connected to the first space through the first gas valve and to the second space through the second gas valve. Specifically, when the first air valve is opened, the third vacuum subunit is connected to the first space, causing the first space to generate negative pressure; when the second air valve is opened, the third vacuum subunit is connected to the second space, causing the second space to generate negative pressure.

7. The surface cleaning device according to claim 1, characterized in that, Also includes: A cleaning fluid spraying unit is used to spray cleaning fluid within a set spraying area, which is located within the third sealed space.

8. The surface cleaning device according to claim 7, characterized in that, The spraying area is located within the third sealed space and outside the first and second sealed spaces.

9. The surface cleaning device according to claim 1, characterized in that, Also includes: The wastewater collection unit has an air inlet connected to the first cavity and / or the second cavity, and an air outlet connected to the vacuum unit. The wastewater collection unit is used to collect wastewater on the surface to be cleaned.

10. The surface cleaning device according to claim 1, characterized in that, The wastewater collection unit includes: The first sewage collection subunit has an air inlet connected to the first cavity and an air outlet connected to the vacuum unit. The first sewage collection subunit is used to collect sewage entering the first sealed space. The second sewage collection subunit has an air inlet connected to the second cavity and an air outlet connected to the vacuum unit. The second sewage collection subunit is used to collect sewage entering the second sealed space.

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