Surface cleaning device

Abstract

The embodiment of the invention provides a surface cleaning device which comprises a shell, the bottom of the shell is provided with a concave cavity, and the concave cavity is used for defining a sealed space with a to-be-cleaned surface; the vacuum unit assembly is arranged in the shell, an air inlet of the vacuum unit assembly is communicated with the concave cavity, and the vacuum unit assembly is used for generating negative pressure in the sealed space; the first airflow channel is arranged in the shell, an air inlet of the first airflow channel is communicated with the inner space of the shell, and an air outlet of the first airflow channel is located at the bottom of the shell and located on the outer side of the concave cavity. In the surface cleaning device, due to the fact that the first airflow channel communicates with the inner space of the shell, airflow flowing through the first airflow channel can cool the interior of the shell, and the heat dissipation effect of the surface cleaning device is improved.

Description

Technical Field

[0001] The present application relates to the field of cleaning technology, and particularly to a surface cleaning device. Background Art

[0002] A surface cleaning device is a household appliance that can provide a cleaning function, such as a self-moving surface cleaning device like a window cleaning robot or a floor cleaning robot. A driving unit and a walking unit are usually provided on the surface cleaning device. The driving unit is used to drive the walking unit to move, thereby driving the surface cleaning device to move on the surface to be cleaned.

[0003] In order to adsorb the surface cleaning device on the surface to be cleaned, a concave cavity is further provided at the bottom of the surface cleaning device. The concave cavity is used to define a sealed space with the surface to be cleaned. A vacuum unit is also provided inside the surface cleaning device. When the vacuum unit works, a negative pressure can be generated in the sealed space, thereby adsorbing the surface cleaning device on the surface to be cleaned.

[0004] However, during the operation of the surface cleaning device, functional modules such as the vacuum unit and the driving unit will generate a large amount of heat, resulting in an increase in the internal temperature of the surface cleaning device, which may further affect the service life of the surface cleaning device.

[0005] It should be noted that the information disclosed in the background art part of the present application is only intended to deepen the understanding of the general background art of the present application, and should not be regarded as an admission or any form of implication that this information constitutes the prior art known to those skilled in the art. Summary of the Invention

[0006] In view of this, the present application provides a surface cleaning device to facilitate solving the problem in the prior art that during the operation of the surface cleaning device, functional modules such as the vacuum unit and the driving unit will generate a large amount of heat, resulting in an increase in the internal temperature of the surface cleaning device, which may further affect the service life of the surface cleaning device.

[0007] In a first aspect, an embodiment of the present application provides a surface cleaning device, including:

[0008] A housing, a concave cavity is provided at the bottom of the housing, and the concave cavity is used to define a sealed space with the surface to be cleaned;

[0009] A vacuum unit assembly, the vacuum unit assembly is arranged inside the housing, an air inlet of the vacuum unit assembly is communicated with the concave cavity, and the vacuum unit assembly is used to generate a negative pressure in the sealed space;

[0010] A first air flow channel, arranged inside the housing, an air inlet of the first air flow channel is communicated with the internal space of the housing, and an air outlet of the first air flow channel is located at the bottom of the housing and outside the concave cavity.

[0011] In a possible implementation, the air inlet of the first air flow channel is located at the top of the housing.

[0012] In a possible implementation, the air inlet of the first air flow channel is located in the central area of the top of the housing, and the air outlet of the first air flow channel is located at the side of the bottom of the housing.

[0013] In a possible implementation, a force application part is provided at the top of the housing, and the air inlets of the first air flow channel are arranged on both sides of the force application part.

[0014] In a possible implementation, the surface cleaning device further includes:

[0015] A driving and walking unit assembly, the driving and walking unit assembly is arranged in the housing, the driving and walking unit assembly includes a driving unit and a walking unit, and the driving unit is used to drive the walking unit to move, so as to drive the surface cleaning device to move;

[0016] The first air flow channel includes a first sub-air flow channel arranged in the driving and walking unit assembly, the air inlet of the first sub-air flow channel is communicated with the internal space of the housing, and the air outlet of the first sub-air flow channel is located at the bottom of the housing and outside the concave cavity.

[0017] In a possible implementation, the walking unit is located inside the first sub-air flow channel.

[0018] In a possible implementation, the air inlet of the first sub-air flow channel is located at the top of the driving and walking unit assembly.

[0019] In a possible implementation, the air inlet of the first sub-air flow channel is located at the top of the driving unit.

[0020] In a possible implementation, the air inlet of the first sub-air flow channel is located on one side of the vacuum unit assembly.

[0021] In a possible implementation, the opening direction of the air inlet of the first sub-air flow channel faces the vacuum unit assembly.

[0022] In a possible implementation, the surface cleaning device includes two driving and walking unit assemblies, and the two driving and walking unit assemblies are symmetrically arranged.

[0023] In the embodiment of the present application, since the first air flow channel is communicated with the internal space of the housing, the air flow flowing through the first air flow channel can cool the inside of the housing, improving the heat dissipation effect of the surface cleaning device. Brief Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 It is a schematic three-dimensional structure diagram of a surface cleaning device provided by an embodiment of the present application;

[0026] Figure 2 It is a schematic three-dimensional structure diagram of another surface cleaning device provided by an embodiment of the present application;

[0027] Figure 3 It is an exploded view of a surface cleaning device provided by an embodiment of the present application;

[0028] Figure 4 It is an exploded view of another surface cleaning device provided by an embodiment of the present application;

[0029] Figure 5 It is a schematic partial three-dimensional structure diagram of a surface cleaning device provided by an embodiment of the present application;

[0030] Figure 6 It is a schematic partial three-dimensional structure diagram of another surface cleaning device provided by an embodiment of the present application;

[0031] Figure 7 It is a schematic diagram of the gas flow direction of a first air flow channel provided by an embodiment of the present application;

[0032] Figure 8 It is a schematic diagram of the gas flow direction of a second air flow channel provided by an embodiment of the present application.

[0033] The symbols in the figure are represented as follows: 100 - housing, 110 - upper housing, 111 - air inlet of the first air flow channel, 112 - force - applying part, 113 - air outlet of the second air flow channel, 120 - lower housing, 121 - concave cavity, 200 - vacuum unit assembly, 210 - vacuum unit, 220 - upper shell of the vacuum unit, 230 - lower shell of the vacuum unit, 241 - air inlet of the vacuum unit assembly, 242 - air outlet of the vacuum unit assembly, 300 - drive and walking unit assembly, 310 - housing of the drive and walking unit, 320 - drive unit, 330 - walking unit, 331 - driving wheel, 332 - driven wheel, 333 - crawler belt, 341 - air inlet of the first sub - air flow channel, 342 - air outlet of the first sub - air flow channel, 351 - air inlet of the second sub - air flow channel, 352 - air outlet of the second sub - air flow channel, 361 - first noise - reduction cavity, 362 - second noise - reduction cavity, 400 - cleaning unit bracket, 410 - cleaning unit, 500 - cleaning liquid container, 600 - spray head. Detailed implementation mode

[0034] For a better understanding of the technical solution of the present application, the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0035] It should be clear that the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0036] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms of "a", "the" and "said" used in the embodiments of the present application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0037] It should be understood that the term " / and" used herein is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A / and B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0038] The surface cleaning device involved in the embodiments of the present application can be a self - moving surface cleaning device such as a window - cleaning robot, a floor - cleaning robot, a mopping robot or a sweeping and mopping integrated robot; or a non - self - moving surface cleaning device that needs to be dragged or held by the user. The surface to be cleaned involved in the embodiments of the present application can be a non - horizontal surface, such as a framed window, a frameless window or a wall surface, etc.; or a horizontal surface, such as a ground or a desktop, etc.

[0039] For ease of description, a front-rear direction, a left-right direction, and an up-down direction perpendicular to each other are defined on the surface cleaning device. Among them, "above" refers to the direction away from the surface to be cleaned, and "below" refers to the direction close to the surface to be cleaned. In some possible implementation manners, "above" may also be referred to as "top", "below" may also be referred to as "bottom", the "front-rear direction" and the "left-right direction" may also be collectively referred to as "side", the "left-right direction" may also be referred to as "first direction", and the "front-rear direction" may also be referred to as "second direction". The embodiments of the present application do not make specific limitations on this.

[0040] Figure 1 FIG. 4 is a schematic three-dimensional structure diagram of a surface cleaning device provided by an embodiment of the present application. Figure 2 FIG. 5 is a schematic three-dimensional structure diagram of another surface cleaning device provided by an embodiment of the present application. As Figure 1 and in combination with Figure 2 shown, the housing 100 of the surface cleaning device includes an upper housing 110 and a lower housing 120. The upper housing 110 is buckled on the lower housing 120 to form an internal space of the surface cleaning device. A concave cavity 121 is provided at the bottom of the lower housing 120. When the surface cleaning device is placed on the surface to be cleaned, the concave cavity 121 is used to define a sealed space with the surface to be cleaned. A vacuum unit assembly 200 (as Figures 3 - 6 shown) is provided inside the surface cleaning device. The air inlet 241 of the vacuum unit assembly is communicated with the concave cavity 121 at the bottom of the lower housing 120. The vacuum unit assembly 200 is used to generate negative pressure in the sealed space defined between the concave cavity 121 and the surface to be cleaned, so as to adsorb the surface cleaning device internally on the surface to be cleaned.

[0041] Further, a traveling unit 330 and a cleaning unit 410 are provided at the bottom of the surface cleaning device. The traveling unit 330 is used to drive the surface cleaning device to move on the surface to be cleaned, so as to drive the cleaning unit 410 to wipe the surface to be cleaned. The cleaning unit 410 may be a rag or a wiping paper provided at the bottom of the lower housing 120, etc. It should be noted that a part of the traveling unit 330 is located inside the housing 100, and the other part extends to the bottom of the housing 100. Therefore, in the embodiments of the present application, it is said that "the traveling unit 330 is located at the bottom of the housing 100". However, in other parts of this article, the position of the traveling unit 330 may also be described as "located inside the housing 100". At this time, it should be understood that a part of the traveling unit 330 is located inside the housing 100.

[0042] In a possible implementation, to facilitate the connection of the cleaning unit 410, the cleaning unit 410 can be connected to the bottom of the lower housing 120 through the cleaning unit bracket 400. Specifically, the cleaning unit bracket 400 is connected to the bottom of the lower housing 120, and the cleaning unit 410 is connected to the bottom of the cleaning unit bracket 400. Specifically, the cleaning unit 410 can be connected to the bottom of the cleaning unit bracket 400 in a detachable manner. For example, the cleaning unit 410 is connected to the bottom of the cleaning unit bracket 400 through connectors such as Velcro or magnets to facilitate the disassembly and replacement of the cleaning unit 410.

[0043] In addition, to improve the obstacle-crossing ability of the surface cleaning device and the sealing performance between the concave cavity 121 and the surface to be cleaned, the cleaning unit bracket 400 is movably connected to the lower housing 120. Specifically, this movable connection means that the cleaning unit bracket 400 has a certain stroke space relative to the lower housing 120, which allows the cleaning unit bracket 400 to move relative to the lower housing 120 within its stroke space. In particular, the cleaning unit bracket 400 can move relative to the lower housing 120 in the up and down directions. In addition, an elastic member is provided between the cleaning unit bracket 400 and the lower housing 120. Through the elastic force of the elastic member, the cleaning unit bracket 400 can be pressed against the surface to be cleaned. Specifically, the elastic member can be a spring or other elastic functional unit, and the embodiments of the present application do not make specific limitations on this.

[0044] Figure 3 It is an exploded view of a surface cleaning device provided by an embodiment of the present application; Figure 4 It is an exploded view of another surface cleaning device provided by an embodiment of the present application; Figure 5 It is a partial three-dimensional structural schematic diagram of a surface cleaning device provided by an embodiment of the present application; Figure 6 It is a partial three-dimensional structural schematic diagram of another surface cleaning device provided by an embodiment of the present application. As Figures 3 - 6 shown, a vacuum unit assembly 200 is provided inside the housing 100. The air inlet 241 of the vacuum unit assembly is connected to the concave cavity 121 at the bottom of the lower housing 120 and is used to generate negative pressure in the sealed space defined between the concave cavity 121 and the surface to be cleaned.

[0045] Specifically, the vacuum unit assembly 200 includes an upper vacuum unit shell 220, a vacuum unit 210, and a lower vacuum unit shell 230. An air inlet (the air inlet 241 of the vacuum unit assembly) is provided on the lower vacuum unit shell 230, and this air inlet communicates with the concave cavity 121 at the bottom of the lower housing 120; an air outlet (the air outlet 242 of the vacuum unit assembly) is provided on the upper vacuum unit shell 220. The upper vacuum unit shell 220 is buckled on the lower vacuum unit shell 230 to form a receiving cavity for the vacuum unit 210, and the vacuum unit 210 is arranged in the receiving cavity for the vacuum unit 210. When the vacuum unit 210 operates, a negative pressure can be generated in the receiving cavity for the vacuum unit 210, and then a negative pressure can be generated in the sealed space defined between the concave cavity 121 and the surface to be cleaned. Among them, the air flow direction is: the air flow in the concave cavity 121 enters the receiving cavity for the vacuum unit 210 through the air inlet 241 of the vacuum unit assembly, and then is discharged from the air outlet 242 of the vacuum unit assembly.

[0046] It should be noted that the vacuum unit 210 involved in the embodiments of the present application is a blower, but it should not be regarded as a limitation of the protection scope of the present application. For example, in addition to the blower, those skilled in the art can also set the vacuum unit 210 as other types of vacuum modules such as a vacuum pump according to actual needs.

[0047] In addition, a driving and walking unit assembly 300 is also provided inside the housing 100. The driving and walking unit assembly 300 includes a driving unit 320 and a walking unit 330. When the driving and walking unit assembly 300 is installed on the lower housing 120, the walking unit 330 passes through the lower housing 120 and extends to the bottom of the lower housing 120 to contact the surface to be cleaned, driving the surface cleaning device to move on the surface to be cleaned. Specifically, the driving unit 320 is used to drive the walking unit 330 to move, and then the walking unit 330 drives the surface cleaning device to move. In a specific implementation, the driving and walking unit assembly 300 can be fixed on the upper side of the lower housing 120 by screws or buckles, etc. The driving unit 320 can include a motor, and the walking unit 330 can include a crawler wheel 333. The embodiments of the present application do not make specific limitations on this.

[0048] In practical applications, when the surface cleaning device works for a long time, functional modules such as the vacuum unit 210 and the driving unit 320 will generate a large amount of heat, resulting in an increase in the temperature inside the surface cleaning device, which may affect the service life of the surface cleaning device.

[0049] In view of the above problems, the embodiment of the present application sets a first airflow channel in the housing 100, and the air inlet 111 of the first airflow channel is connected to the internal space of the housing 100, and the air outlet of the first airflow channel is located at the bottom of the housing 100 and outside the concave cavity 121. When there is a negative pressure in the concave cavity 121 at the bottom of the housing 100, the air outside the concave cavity 121 flows into the concave cavity 121, and then a certain negative pressure is generated outside the concave cavity 121. It can be understood that the negative pressure value outside the concave cavity 121 is less than the negative pressure value inside the concave cavity 121. Since the air outlet of the first airflow channel is located at the bottom of the housing 100, when there is a negative pressure at the bottom of the housing 100, a negative pressure will also be generated in the first airflow channel, so that the airflow flows into the first airflow channel from the air inlet 111 of the first airflow channel, and then is discharged at the air outlet of the first airflow channel. Since the air inlet 111 of the first air flow channel is connected to the internal space of the shell 100 , the cold air flow entering the shell 100 through the air inlet 111 of the first air flow channel can take away the heat inside the shell 100 , thereby reducing the temperature inside the shell 100 .

[0050] It is understandable that the inner side of the concave cavity 121 has a lower negative pressure value than the outer side of the concave cavity 121. If the air outlet of the first airflow channel is set inside the concave cavity 121, the flow rate of the airflow in the first airflow channel will obviously increase. However, this arrangement will also cause pressure loss in the concave cavity 121, which may cause the surface cleaning device to fall on the surface to be cleaned. Therefore, in the embodiment of the present application, the air outlet of the first airflow channel is set outside the concave cavity 121.

[0051] It should be noted that, in the embodiment of the present application, except for the "air inlet 111 of the first air flow channel" and the "air outlet of the first air flow channel", the internal space of the housing 100 is in a sealed state. In other words, the air flow can only flow into and out of the housing 100 through the "air inlet 111 of the first air flow channel" and the "air outlet of the first air flow channel".

[0052] Please continue reading Figures 1 - 4 In the embodiment of the present application, the air inlet 111 of the first air flow channel is arranged at the top of the housing 100. Since the air outlet of the first air flow channel is located at the bottom of the housing 100, the air inlet 111 of the first air flow channel is arranged at the top of the housing 100, so that the flow path of the air flow in the first air flow channel can be increased, thereby improving the heat dissipation effect.

[0053] Further, the air inlet 111 of the first air flow channel is arranged in the central area of the top of the housing 100, that is, the air inlet 111 of the first air flow channel is arranged at a position close to the center of the top of the housing 100. Since the air outlet of the first air flow channel is located on one side of the bottom of the housing 100, setting the air inlet 111 of the first air flow channel in the central area of the top of the housing 100 can further increase the flow path of the air flow in the first air flow channel, thereby improving the heat dissipation effect. In a specific implementation, there are multiple air outlets of the first air flow channel at the bottom of the housing 100, and the multiple air outlets of the first air flow channel are arranged in central symmetry. Exemplarily, there are 2 air outlets of the first air flow channel at the bottom of the housing 100, and the 2 air outlets of the first air flow channel are respectively arranged on the left and right sides of the bottom of the housing 100 and are arranged in central symmetry; or, the 2 air outlets of the first air flow channel are respectively arranged on the front and rear sides of the bottom of the housing 100 and are arranged in central symmetry.

[0054] In some possible implementation manners, a force application part 112 is provided on the top of the housing 100, and the user can move the surface cleaning device by holding the force application part 112. In order to make the force applied evenly, the force application part 112 is usually arranged at the central position of the top of the housing 100. At this time, the air inlet 111 of the first air flow channel can be arranged on both sides of the force application part 112.

[0055] In some possible implementation manners, the first air flow channel includes a first sub-air flow channel arranged in the drive and walking unit assembly 300. The air inlet 341 of the first sub-air flow channel is communicated with the internal space of the housing 100, and the air outlet 342 of the first sub-air flow channel is located at the bottom of the housing 100 and outside the concave cavity 121. That is to say, in the embodiment of the present application, the first air flow channel includes the internal space of the housing 100 and the first sub-air flow channel. Among them, the air outlet 342 of the first sub-air flow channel is the air outlet of the first air flow channel.

[0056] Specifically, the driving and walking unit assembly 300 includes a driving and walking unit housing 310. Inside the driving and walking unit housing 310, there are a driving unit 320 accommodation cavity and a walking unit 330 accommodation cavity. The driving unit 320 is installed in the driving unit 320 accommodation cavity, and the walking unit 330 is installed in the walking unit 330 accommodation cavity. Among them, at the bottom of the walking unit 330 accommodation cavity, there is an opening of the walking unit 330 accommodation cavity, and the walking unit 330 extends to the outside of the driving and walking unit housing 310 through the opening of the walking unit 330 accommodation cavity. When the driving and walking unit assembly 300 is installed on the lower housing 120, the walking unit 330 passes through the lower housing 120 and extends to the bottom of the lower housing 120. In the embodiment of the present application, the walking unit 330 is located inside the first sub-airflow channel, thereby improving the heat dissipation effect of the walking unit 330. It can be understood that in this implementation manner, the walking unit 330 accommodation cavity belongs to a part of the first sub-airflow channel, and the opening of the walking unit 330 accommodation cavity is the air outlet 342 of the first sub-airflow channel.

[0057] See Figure 7 , which is a schematic diagram of the gas flow direction of a first air channel provided by the embodiment of the present application. As Figure 7 shown, when the vacuum unit 210 works, the air flow outside the housing 100 enters the inside of the housing 100 from the air inlet 111 of the first air channel, and then enters the first sub-airflow channel from the air inlet 341 of the first sub-airflow channel, and then is discharged from the air outlet 342 of the first sub-airflow channel.

[0058] In some possible implementation manners, the air inlet 341 of the first sub-airflow channel is provided at the top of the driving and walking unit assembly 300. Since the air outlet 342 of the first sub-airflow channel is located at the bottom of the driving and walking unit assembly 300, therefore, setting the air inlet 341 of the first sub-airflow channel at the top of the driving and walking unit assembly 300 can increase the flow path of the air flow in the first sub-airflow channel, thereby improving the heat dissipation effect.

[0059] Furthermore, the air inlet 341 of the first sub-airflow channel is provided at the top of the driving unit 320, that is, the projections of the "air inlet 341 of the first sub-airflow channel" and the "driving unit 320" in the up-down direction at least partially overlap. It can be understood that through this structural design, the flow rate of the air flow flowing through the outer surface of the driving unit 320 accommodation cavity can be increased, thereby improving the heat dissipation effect on the driving unit 320.

[0060] In a possible implementation, the air inlet 111 of the first air flow channel is provided at the top of the vacuum unit assembly 200, and the air inlet 341 of the first sub-air flow channel is located on one side of the vacuum unit assembly 200. It can be understood that when the air flow enters the interior of the housing 100 from the air inlet 111 of the first air flow channel, it flows towards the air inlet 341 of the first sub-air flow channel. Therefore, through this structural design, the flow rate of the air flow flowing through the outer surface of the vacuum unit assembly 200 can be increased, thereby improving the heat dissipation effect on the vacuum unit assembly 200.

[0061] Furthermore, the opening direction of the air inlet 341 of the first sub-air flow channel faces the vacuum unit assembly 200. Through this structural design, the flow direction of the air flow can be made more conforming to the outer surface of the vacuum unit assembly 200, further increasing the flow rate of the air flow flowing through the outer surface of the vacuum unit assembly 200, thereby improving the heat dissipation effect on the vacuum unit assembly 200.

[0062] It should be noted that those skilled in the art can provide an independent air outlet for the first air flow channel at the bottom of the housing 100 according to actual needs, thereby guiding the air flow inside the housing 100 to the bottom of the housing 100. However, in the embodiments of the present application, the air flow inside the housing 100 is guided to the bottom of the housing 100 through the first sub-air flow channel in the driving and walking unit assembly 300. On the one hand, the heat dissipation effect of the driving and walking unit assembly 300 can be improved. On the other hand, using the opening of the accommodating cavity of the walking unit 330 as the air outlet of the first air flow channel can reduce the opening at the bottom of the housing 100, thereby improving the strength of the housing 100.

[0063] In practical applications, in order to ensure that the surface cleaning device can stably adsorb on the surface to be cleaned, it is necessary to provide sufficient negative pressure in the sealed space defined between the concave cavity 121 and the surface to be cleaned. Therefore, the vacuum unit 210 needs to operate at a relatively high power. However, a relatively high operating power of the vacuum unit 210 will cause the surface cleaning device to generate relatively large wind noise, affecting the user experience.

[0064] To address the above problems, in the embodiments of the present application, a second air flow channel is further provided inside the housing 100. The air inlet of the second air flow channel is connected to the air outlet 242 of the vacuum unit assembly, and the air outlet 113 of the second air flow channel is connected to the outside of the housing 100, thereby guiding the air flow to the outside of the housing 100. Among them, the second air flow channel includes at least one noise reduction cavity. In order to achieve the noise reduction effect, the conditions that the noise reduction cavity should meet are: the cross-sectional area of the air inlet and / or the air outlet is smaller than the cross-sectional area of the noise reduction cavity (the cross-sectional area perpendicular to the air flow direction). That is to say, the air inlet and / or the air outlet of the noise reduction cavity is smaller, and the internal space is larger.

[0065] In the embodiments of the present application, since a noise reduction cavity is provided in the air flow channel, the wind noise inside the surface cleaning device can be reduced, thereby improving the user experience.

[0066] In some possible implementation manners, in order to further improve the noise reduction effect, two noise reduction cavities are provided in the second air flow channel. For the convenience of description, in the embodiments of the present application, these two noise reduction cavities are respectively referred to as "the first noise reduction cavity 361" and "the second noise reduction cavity 362". Specifically, the air inlet of the first noise reduction cavity 361 is communicated with the air outlet of the vacuum unit 210, and the cross-sectional area of the air inlet of the first noise reduction cavity 361 is smaller than the cross-sectional area of the first noise reduction cavity 361; the air inlet of the second noise reduction cavity 362 is communicated with the air outlet of the first noise reduction cavity 361, and the cross-sectional area of the air outlet of the second noise reduction cavity 362 is smaller than the cross-sectional area of the second noise reduction cavity 362. Further, the cross-sectional area of the air outlet of the first noise reduction cavity 361 can also be set to be smaller than the cross-sectional area of the first noise reduction cavity 361; and / or, the cross-sectional area of the air inlet of the second noise reduction cavity 362 can be set to be smaller than the cross-sectional area of the second noise reduction cavity 362. It can be understood that according to the above structural setting, "the first noise reduction cavity 361 and the second noise reduction cavity 362 form a gourd-shaped cavity.

[0067] In some possible implementation manners, the first noise reduction cavity 361 and the second noise reduction cavity 362 can be directly communicated, or can be connected through other air flow channels. The embodiments of the present application do not make specific limitations on this. It should be noted that when the first noise reduction cavity 361 and the second noise reduction cavity 362 are directly communicated, the air outlet of the first noise reduction cavity 361 and the air inlet of the second noise reduction cavity 362 are usually the same area.

[0068] It can be understood that the more the number of noise reduction cavities connected in series in the second air flow channel, the better the noise reduction effect. Therefore, those skilled in the art can set more noise reduction cavities in the second air flow channel according to actual needs, and the embodiments of the present application do not make specific limitations on this.

[0069] In some possible implementation manners, the second air flow channel includes a second sub-air flow channel provided in the driving and walking unit assembly 300. The air inlet 351 of the second sub-air flow channel is communicated with the air outlet 242 of the vacuum unit assembly, and the air outlet 352 of the second sub-air flow channel is communicated with the outside of the housing 100. In a specific implementation, the "air inlet 351 of the second sub-air flow channel" and the "air outlet 242 of the vacuum unit assembly" can be directly communicated, or can be connected through other air flow channels. The embodiments of the present application do not make specific limitations on this. It should be noted that when the "air inlet 351 of the second sub-air flow channel" and the "air outlet 242 of the vacuum unit assembly" are directly communicated, the air inlet 351 of the second sub-air flow channel is the air inlet of the second air flow channel.

[0070] See Figure 8 , which is a schematic diagram of the gas flow direction of a second air flow channel provided by an embodiment of the present application. As Figure 8 shown, when the vacuum unit 210 operates, the air flow outside the housing 100 enters the vacuum unit assembly 200 from the concave cavity 121 at the bottom of the housing 100, then enters the second sub-air flow channel through the air outlet 242 of the vacuum unit assembly and the air inlet 351 of the second sub-air flow channel, and finally is discharged through the air outlet 352 of the second sub-air flow channel.

[0071] In the embodiment of the present application, the second sub-air flow channel includes a first noise reduction cavity 361 and a second noise reduction cavity 362. Among them, the first noise reduction cavity 361 is a housing cavity for the driving unit 320, and the second noise reduction cavity 362 extends through the traveling unit 330 to the side of the housing 100. In the embodiment of the present application, the first noise reduction cavity 361 and the second noise reduction cavity 362 are designed using the existing spatial structure of the driving and traveling unit assembly 300. While improving the noise reduction effect, the internal space of the housing 100 is saved, making the structure of the surface cleaning device more compact.

[0072] It should be noted that those skilled in the art can, according to actual needs, only set the first noise reduction cavity 361 inside the driving and traveling unit assembly 300, or only set the second noise reduction cavity 362 inside the driving and traveling unit assembly 300. The embodiments of the present application do not make specific limitations on this.

[0073] Specifically, the traveling unit 330 is a crawler wheel 333, and the crawler wheel 333 includes a driving wheel 331, a driven wheel 332, and a crawler 333. The crawler 333 surrounds the outer edges of the driving wheel 331 and the driven wheel 332. It can be understood that there is an approximately triangular enclosed space between the upper sides of the driving wheel 331, the driven wheel 332, and the crawler 333. In the embodiment of the present application, the second noise reduction cavity 362 passes through this enclosed space and extends to the side of the housing 100, without affecting the existing structure of the traveling unit 330 while passing the second noise reduction cavity 362 through the traveling unit 330.

[0074] Please continue to refer to Figure 3 , in the embodiment of the present application, when the upper housing 110 is buckled on the lower housing 120, at least part of the air outlet 113 of the second air flow channel on the upper housing 110 overlaps with the air outlet 352 of the second sub-air flow channel, so that the air flow flowing out of the air outlet 352 of the second sub-air flow channel can be discharged to the outside of the housing 100 through the air outlet 113 of the second air flow channel.

[0075] In summary, the drive and walking unit assembly 300 provided in this application includes two air flow channels, namely a first sub-air flow channel and a second sub-air flow channel, and the first sub-air flow channel and the second sub-air flow channel are isolated from each other. In the embodiments of this application, the internal space of the drive and walking unit assembly 300 is fully utilized to integrate the first sub-air flow channel and the second sub-air flow channel inside the drive and walking unit assembly 300, which can not only improve the noise reduction and heat dissipation effects, but also make the structure more compact.

[0076] It should be noted that only one drive and walking unit assembly 300 is taken as an example to describe the technical solution provided in the embodiments of this application above. Those skilled in the art should understand that generally two symmetrically arranged drive and walking unit assemblies 300 are included in the surface cleaning device, and each drive and walking unit assembly 300 respectively includes a first sub-air flow channel and a second sub-air flow channel. The first sub-air flow channels and the second sub-air flow channels in the two drive and walking unit assemblies 300 are also symmetrically arranged. For the sake of brevity of description, they will not be elaborated here.

[0077] To improve the cleaning effect on the surface to be cleaned, a cleaning liquid storage tank 500 and a spray head 600 communicated with the cleaning liquid storage tank 500 can also be provided on the surface cleaning device. Among them, the cleaning liquid storage tank 500 is used to store cleaning liquid (for example, water or an aqueous solution added with a cleaning agent, a disinfectant, etc.), and the spray head 600 can spray the cleaning liquid on the surface to be cleaned, thereby improving the cleaning effect.

[0078] In the embodiments of this application, "at least one" means one or more, and "a plurality" means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent the situations of A existing alone, A and B existing simultaneously, and B existing alone. Where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the front and rear associated objects. "At least one of the following" and its similar expressions refer to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, and c can represent: a, b, c, a - b, a - c, b - c, or a - b - c, where a, b, and c can be single or multiple.

[0079] Those of ordinary skill in the art can realize that the units and algorithm steps described in the embodiments disclosed herein can be implemented by a combination of electronic hardware, computer software, and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0080] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments, and will not be elaborated herein.

[0081] In several embodiments provided in the present application, if any function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or a part of this 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 for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs that can store program codes.

[0082] The above is only the specific implementation manner of the present application. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application, and all of them should be covered by the protection scope of the present application. The protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A surface cleaning device, characterized in that, Comprising: A housing having a concave cavity at the bottom thereof, the concave cavity being configured to define a sealed space with a surface to be cleaned; A vacuum unit assembly disposed within the housing, an air inlet of the vacuum unit assembly being in communication with the concave cavity, the vacuum unit assembly being configured to generate a negative pressure within the sealed space; A first air flow channel disposed within the housing, an air inlet of the first air flow channel being in communication with the internal space of the housing, and an air outlet of the first air flow channel being located at the bottom of the housing and outside the concave cavity.

2. The surface cleaning device according to claim 1, wherein, The air inlet of the first air flow channel is located at the top of the housing.

3. The surface cleaning device according to claim 2, wherein The air inlet of the first air flow channel is located in a central region at the top of the housing, and the air outlet of the first air flow channel is located at a side portion of the bottom of the housing.

4. The surface cleaning device according to claim 3, wherein The top of the housing is provided with a force-applying portion, and the air inlet of the first air flow channel is disposed on both sides of the force-applying portion.

5. The surface cleaning device according to claim 1, characterized in that The surface cleaning device further comprises: A drive and travel unit assembly disposed within the housing, the drive and travel unit assembly including a drive unit and a travel unit, the drive unit being configured to drive the travel unit to move, thereby driving the surface cleaning device to move; The first air flow channel includes a first sub-air flow channel disposed within the drive and travel unit assembly, an air inlet of the first sub-air flow channel being in communication with the internal space of the housing, and an air outlet of the first sub-air flow channel being located at the bottom of the housing and outside the concave cavity.

6. The surface cleaning device according to claim 5, characterized in that, The travel unit is located inside the first sub-air flow channel.

7. The surface cleaning device according to claim 5, wherein, The air inlet of the first sub-air flow channel is located at the top of the drive and travel unit assembly.

8. The surface cleaning device according to claim 7, characterized in that, The air inlet of the first sub-air flow channel is located at the top of the drive unit.

9. The surface cleaning device according to claim 5, wherein, The air inlet of the first sub-air flow channel is located on one side of the vacuum unit assembly.

10. The surface cleaning device according to claim 9, characterized in that, The opening direction of the air inlet of the first sub-air flow channel faces the vacuum unit assembly.

11. The surface cleaning device according to claim 5, characterized in that, The surface cleaning device includes two of the drive and travel unit assemblies, and the two drive and travel unit assemblies are symmetrically disposed.

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