Sewage tank and surface cleaning equipment

Abstract

The utility model discloses a sewage tank and surface cleaning equipment, and belongs to the technical field of surface cleaning. The sewage tank comprises a body and a cover body, the body comprises a suction pipe and a shell surrounding the periphery of the suction pipe, an opening is formed in the top of the shell, and the inner wall of the shell and the outer wall of the suction pipe define a containing cavity; the cover body comprises a fixing structure and a first water retaining structure, the peripheral wall of the fixing structure is in sealing fit with the inner wall of the opening and is provided with a suction opening, a first water retaining part of the first water retaining structure shields the lower portion of the suction opening and is located above the suction pipe, and a water retaining surrounding part of the first water retaining structure surrounds the peripheral side of the first water retaining part and extends downwards; the air passage for communicating the suction port with the accommodating cavity is arranged between the water retaining enclosure part and the inner side wall of the body, so that air in the sewage tank can flow to the suction port from the air passage, water in the sewage tank can be prevented from being directly sucked to the suction port, the water is prevented from being sucked to a suction source, and normal work of the suction source is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of surface cleaning, and in particular to a sewage tank and surface cleaning equipment. Background Art

[0002] Surface cleaning equipment is mainly used to clean and maintain hard surfaces such as floors, tiles, marble, etc. Floor scrubbers are common surface cleaning equipment on the market. They can mop the floor and suck out the water stains left on the floor after mopping to prevent the floor from being too slippery. The sucked-out sewage will be stored in the sewage tank. After the cleaning work is completed, the water in the sewage tank will be centrally processed.

[0003] In the related art, the surface cleaning equipment usually includes a body, a handle, a floor brush assembly, a clean water tank, a dirty water tank and a suction source. The handle is installed at the upper end of the body, the floor brush assembly is installed at the lower end of the body, and the clean water tank, the dirty water tank and the suction source are installed on the body. When the roller brush of the floor brush assembly rotates, the clean water in the clean water tank flows out from the roller brush to remove stains, oil stains and other dirt on the surface to be cleaned while washing and brushing. In this process, the suction source is used to suck the dirty water remaining after the roller brush is cleaned into the dirty water tank to keep the surface to be clean and tidy.

[0004] When the user holds the handle to work, in order to clean special corners of the ground, the machine body is sometimes placed parallel to the ground. At this time, the sewage tank is also roughly in a horizontal state. The sewage therein is easy to flow to the suction port, and then easily sucked from the suction port to the suction source, affecting the normal operation of the suction source.

[0005] This section provides background information related to the present application which is not necessarily prior art. Utility Model Content

[0006] One object of the present application is to solve or at least alleviate part or all of the above problems. To this end, one object of the present application is to provide a sewage tank and a surface cleaning device.

[0007] In order to achieve the above objectives, this application adopts the following technical solutions:

[0008] In a first aspect, the present application provides a sewage tank for a surface cleaning device, the sewage tank comprising:

[0009] The body comprises a suction pipe and a shell surrounding the suction pipe, wherein the bottom wall or the side wall of the shell is sealed and connected with the outer wall of the suction pipe, the top of the shell has an opening, and the inner wall of the shell and the outer wall of the suction pipe are surrounded to form a receiving cavity;

[0010] The cover body includes a fixed structure and a first water retaining structure connected to the fixed structure, the outer peripheral wall of the fixed structure is sealed with the inner wall of the opening, the fixed structure has a suction port running through its thickness direction, the first water retaining structure includes a first water retaining portion and a water retaining surrounding portion, the first water retaining portion blocks the bottom of the suction port and is located above the suction pipe, the water retaining surrounding portion is surrounded by the first water retaining portion and extends downward, and an air duct is provided between the water retaining surrounding portion and the inner side wall of the main body for connecting the suction port and the accommodating cavity.

[0011] As an optional solution for the sewage tank, the water retaining enclosure includes a first water retaining enclosure, and a blocking member is provided at the lower end of the first water retaining enclosure surrounding the water outlet of the suction pipe, and the blocking member prevents liquid from flowing out from between the first water retaining enclosure and the inner side wall of the body.

[0012] As an optional solution of the sewage tank, the air passage is formed between an inner side wall of the body and a surface of the blocking member away from the suction pipe.

[0013] As an optional solution for the sewage tank, the water retaining enclosure further includes a second water retaining enclosure, the lower end surface of the second water retaining enclosure is lower than the water outlet of the suction pipe and is arranged around the other side of the suction pipe.

[0014] As an optional solution for the sewage tank, a guide surface is provided on one side of the water outlet of the suction pipe close to the first water retaining enclosure, and the guide surface is inclined from bottom to top in a direction away from the first water retaining enclosure.

[0015] As an optional solution of the sewage tank, the first water retaining portion is inclined downward in a direction from the second water retaining surrounding portion to the first water retaining surrounding portion.

[0016] As an optional solution for the sewage tank, the cover body also includes a second water retaining structure, which includes a connecting part and a second water retaining part. The upper end of the connecting part is fixedly connected to the first water retaining part, and the lower end of the connecting part is connected to the second water retaining part. The second water retaining part is located below the second water retaining part and divides the accommodating cavity into a first water storage cavity and a second water storage cavity which are arranged upper and lower and connected.

[0017] As an optional solution for the sewage tank, the outer wall of the second water retaining portion is sealed with the inner wall of the accommodating cavity, and a gap connecting the first water storage cavity and the second water storage cavity is provided between the outer wall of the second water retaining portion and the outer wall of the suction pipe.

[0018] As an optional solution of the sewage tank, the sewage tank further includes a filtering water absorbing device, and the upper surface of the first water retaining portion has a boss for supporting the filtering water absorbing device.

[0019] In a second aspect, the present application provides a surface cleaning device, comprising a body and the above-mentioned sewage tank, wherein the body has a receiving groove, and the sewage tank is detachably installed in the receiving groove.

[0020] The beneficial effects of this application are:

[0021] The sewage tank provided by the present application comprises a body and a cover body, the body comprises a suction pipe and a shell arranged around the suction pipe, the bottom wall or side wall of the shell is closed and connected with the outer wall of the suction pipe, the top of the shell is provided with an opening, and the inner wall of the shell and the outer wall of the suction pipe are arranged to form a receiving cavity; the cover body comprises a fixed structure and a first water retaining structure connected to the fixed structure, the outer peripheral wall of the fixed structure is sealed with the inner wall of the opening, the fixed structure has a suction port running through its thickness direction, the first water retaining structure comprises a first water retaining part and a water retaining surrounding part, the first water retaining part blocks the bottom of the suction port and is located above the suction pipe, the water retaining surrounding part is arranged around the first water retaining part and extends downward, and an air vent for connecting the suction port is provided between the water retaining surrounding part and the inner side wall of the body, which can ensure that the gas in the sewage tank can flow from the air vent to the suction port, and can also prevent the water in the sewage tank from being directly sucked to the suction port, thereby preventing the water from being sucked to the suction source, and ensuring that the suction source can work normally.

[0022] The surface cleaning device provided in the present application can prevent the sewage in the sewage tank from being sucked into the suction source through the suction port by applying the above-mentioned sewage tank, thereby ensuring that the suction source can work stably and improving the stability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present application and these drawings without paying any creative work.

[0024] Figure 1 is an exploded schematic diagram of a surface cleaning device provided in an embodiment of the present application;

[0025] Figure 2 is an exploded schematic diagram of a sewage tank provided in an embodiment of the present application;

[0026] Figure 3 is a cross-sectional schematic diagram of a sewage tank provided in an embodiment of the present application;

[0027] Figure 4 It is a schematic diagram of the structure of the water retaining member provided in an embodiment of the present application.

[0028] Reference numerals:

[0029] 1. Body; 11. First installation position; 12. Second installation position; 13. Third installation position; 14. Fourth installation position;

[0030] 2. Handle;

[0031] 3. Floor brush assembly; 31. Floor brush housing; 32. Roller brush; 33. Roller;

[0032] 4. Sewage tank; 40. Suction port; 400. Accommodating chamber; 401. First water storage chamber; 402. Second water storage chamber; 41. Main body; 411. Suction pipe; 4111. Guide surface; 412. Shell; 42. Cover; 421. Fixed structure; 4211. Plate; 4212. Fixed column; 4213. Wall; 422. First water retaining structure; 4221. First water retaining part; 4222. First water retaining surrounding part; 42221. Blocking member; 4223. Second water retaining surrounding part; 423. Second water retaining structure; 4231. Connecting part; 4232. Second water retaining part; 424. Cover; 43. Filtering and water absorbing device;

[0033] 5. Clean water tank. DETAILED DESCRIPTION

[0034] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above drawings.

[0035] In this application, the terms "comprises", "includes", "has" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0036] In this application, the term "and / or" is a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects before and after are in an "and / or" relationship.

[0037] In the present application, the terms "connect", "combine", "couple", and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, direct connection refers to two parts or components being connected together without the need for an intermediate piece, and indirect connection refers to two parts or components being connected to at least one intermediate piece respectively, and the two parts or components being connected via the intermediate piece. In addition, "connect" and "couple" are not limited to physical or mechanical connections or couplings, and may include electrical connections or couplings.

[0038] In the present application, it will be understood by those of ordinary skill in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerances caused by manufacturing, assembly, and use associated with a specific value, and the like. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0039] In this application, it will be understood by those skilled in the art that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0040] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, the bottom can include directly below, lower left, lower right, lower front, and lower back, etc.

[0041] The present application provides a surface cleaning device for cleaning hard surfaces such as floors, tiles, marble, etc., and for sucking out water stains remaining on the floor after mopping to prevent the floor from being too slippery. It is understandable that the surface cleaning device can be a floor scrubber, such as a portable floor scrubber or a ride-on floor scrubber, etc., which is not limited here.

[0042] Figure 1 Schematic diagram of the decomposition of the surface cleaning device provided by the present application is shown. Figure 1 As shown, the surface cleaning device includes a body 1, a handle 2, a suction source (not shown in the figure), a sewage tank 4, a floor brush assembly 3 and a clean water tank 5. The body 1 has a first mounting position 11, a second mounting position 12, a third mounting position 13 and a fourth mounting position 14 arranged in sequence from top to bottom, and the handle 2 is installed at the first mounting position 11; the suction source is installed at the second mounting position 12, and the sewage tank 4 is installed at the third mounting position 13. The sewage tank 4 has a accommodating cavity therein, and the sewage tank 4 has a suction port 40 connecting the suction source and the accommodating cavity at one end close to the suction source, and the suction source sucks water from the surface to be cleaned into the accommodating cavity through the suction port 40; the floor brush assembly 3 is installed at the fourth mounting position 14, and the floor brush assembly 3 includes a floor brush housing 31 and a roller brush 32 rotatably mounted on the floor brush housing 31; the clean water tank 5 is installed on the floor brush housing 31 and is used to supply clean water to the roller brush 32.

[0043] Two clean water tanks 5 are symmetrically installed at both ends of the floor brush assembly 3. Such an arrangement can not only make the overall force of the floor brush assembly 3 balanced, but also increase the gravity of the floor brush assembly 3, so that the floor brush assembly 3 is more stable when walking. The two clean water tanks 5 are arranged at intervals along the length direction of the roller brush 32, and the two clean water tanks 5 have a connecting port, and the connecting ports of the two clean water tanks 5 are connected by a pipeline, so as to improve the cleaning efficiency of the roller brush 32.

[0044] When the floor needs to be cleaned, the user can stand on the rear side of the surface cleaning device, hold the handle 2 of the surface cleaning device and push the surface cleaning device to clean the floor. It will take a lot of physical strength for the user to push the surface cleaning device for a long time. In order to reduce the labor intensity of the user when cleaning the floor, the floor brush assembly 3 also includes a roller 33, which is rotatably mounted on the floor brush housing 31, and the wheel surface of the roller 33 can contact the ground, so that the floor brush assembly 3 can roll forward relative to the ground. In one embodiment, the number of rollers 33 is two, and the two rollers 33 are symmetrically mounted on the floor brush housing 31 with the central axis of the floor brush housing 31 as the center, so that the floor brush assembly 3 can stably roll forward relative to the ground.

[0045] The body 1 and the floor brush assembly 3 are rotatably connected to facilitate the user to adjust the angle between the body 1 and the floor brush assembly 3 according to the cleaning needs, so as to clean the floor at different positions and angles. In one embodiment, the floor brush housing 31 has a rotation hole arranged parallel to the roller brush 32; the body 1 includes a body and a rotation shaft fixed to the lower end of the body, and the rotation shaft can be rotatably installed in the rotation hole to enable the body to rotate relative to the floor brush assembly 3. Furthermore, there are two rotation holes, which are symmetrically arranged with the central axis of the floor brush housing 31 as the center, and the two ends of the rotation shaft are respectively rotatably matched with a rotation hole.

[0046] In one embodiment, the third installation position 13 is a receiving groove, and the sewage tank 4 is detachably installed in the receiving groove. When the sewage tank 4 is installed in the receiving groove of the fuselage body, the outer surface of the sewage tank 4 is flush with the outer surface of the fuselage body, and the assembly of the fuselage body and the sewage tank 4 forms a cylindrical whole (see figure), which can improve the appearance of the equipment.

[0047] The body and the handle 2 are detachably connected via an elastic convex. In one embodiment, the first mounting position 11 of the body is a tube structure, the outer wall of the tube structure has a locking hole, the lower end of the handle 2 has a plug-in portion, and the outer wall of the plug-in portion has an elastic convex. When the plug-in portion is inserted into the tube structure, the elastic convex can extend into the locking hole, which can not only realize the connection between the handle 2 and the body, but also prevent the handle 2 from being separated from the body.

[0048] When the user holds the handle 2 to work, in order to clean special corners of the ground, the body 1 is sometimes placed parallel to the ground. At this time, the sewage tank 4 is also roughly in a horizontal state, and the sewage therein is easy to flow to the suction port 40, and then easily sucked from the suction port 40 to the suction source, affecting the normal operation of the suction source.

[0049] In order to solve the above problems, the present application improves the structure of the sewage tank 4, which can reduce the probability that the water cup of the sewage tank 4 is sucked into the suction source, ensure the stable operation of the suction source, and improve the stability of the equipment.

[0050] Figure 2 The exploded schematic diagram of the sewage tank 4 provided in the present application is shown. Figure 3 A schematic cross-sectional view of a sewage tank 4 provided in the present application is shown. Figure 4 FIG. 4 is a schematic diagram showing the structure of the cover body 42 provided in the present application. Figures 2 to 4As shown, the sewage tank 4 includes a body 41 and a cover 42, the body 41 includes a suction pipe 411 and a shell 412 arranged around the suction pipe 411, the bottom wall or side wall of the shell 412 is closed and connected to the outer wall of the suction pipe 411, the top of the shell 412 has an opening, the inner wall of the shell 412 and the outer wall of the suction pipe 411 are surrounded to form a receiving cavity 400; the cover 42 includes a fixed structure 421 and a first water retaining structure 422 connected to the fixed structure 421, the outer peripheral wall of the fixed structure 421 is sealed with the inner wall of the opening, and the fixed structure 421 has a suction port 400 running through its thickness direction. The first water retaining structure 422 includes a first water retaining portion 4221 and a water retaining enclosure portion. The first water retaining portion 4221 blocks the bottom of the suction port 40 and is located above the suction pipe 411. The water retaining enclosure portion is arranged around the first water retaining portion 4221 and extends downward. An air passage for connecting the suction port 40 and the accommodating chamber 400 is provided between the water retaining enclosure portion and the inner side wall of the body 41, which can ensure that the gas in the sewage tank 4 can flow from the air passage to the suction port 40, and can also prevent the water in the sewage tank 4 from being directly sucked into the suction port 40, thereby preventing the water from being sucked into the suction source, thereby ensuring that the suction source can work normally.

[0051] It should be noted that “the inner wall of the shell 412 and the outer wall of the suction tube 411 are arranged to form the accommodating chamber 400 ” means that all parts of the shell 412 except the suction tube 411 are the accommodating chamber 400 .

[0052] The water retaining enclosure includes a first water retaining enclosure 4222, and a blocking member 42221 is provided at the lower end of the first water retaining enclosure 4222 enclosing the water outlet of the suction pipe 411, and the blocking member 42221 is used to prevent liquid from flowing out from between the first water retaining enclosure 4222 and the inner side wall of the body 41. In one embodiment, the blocking member 42221 can be made of rubber, and the gap between the first water retaining enclosure 4222 and the inner side wall of the body 41 is sealed by the flexible deformation of the blocking member 42221 to prevent liquid from flowing into the suction port 40 from there. Furthermore, an air duct is formed between the inner side wall of the body 41 and the surface of the blocking member 42221 away from the suction pipe 411, so as to achieve waterproofing while ensuring that gas can flow smoothly into the suction port 40.

[0053] The water retaining enclosure also includes a second water retaining enclosure 4223. The lower end surface of the first water retaining enclosure 4222 is higher than the suction pipe 411 and is arranged around one side of the suction pipe 411. The lower end surface of the second water retaining enclosure 4223 is lower than the water outlet of the suction pipe 411 and is arranged around the other side of the suction pipe 411. The first water retaining enclosure 4221 is inclined downward in the direction from the second water retaining enclosure 4223 to the first water retaining enclosure 4222. In this way, the airway is higher than the water outlet of the suction pipe 411, which can prevent the water flowing out of the suction pipe 411 from flowing directly to the airway. At the same time, the second water retaining enclosure 4223 can enclose and guide the water flowing out of the water outlet of the suction pipe 411 to prevent the water from splashing in the sewage tank 4.

[0054] When the suction source is working, the air in the accommodating chamber 400 enters the suction port 40 from the air duct formed by the first water retaining enclosure 4222 and the inner wall of the main body 41, then enters the air inlet of the suction source from the suction port 40, and is finally discharged from the air outlet of the suction source, thereby generating a negative pressure in the accommodating chamber 400, thereby allowing external water to enter from the water inlet of the suction pipe 411 and be discharged into the accommodating chamber 400 from the water outlet of the suction pipe 411.

[0055] The suction pipe 411 extends in the height direction of the main body 41, and the water inlet at the lower end of the suction pipe 411 is connected to the outside through a pipeline to facilitate the inflow of sewage from the ground. The water outlet at the upper end of the suction pipe 411 is located at an upper position in the accommodating chamber 400 and is connected to the accommodating chamber 400 to facilitate the water drawn from the suction pipe 411 to flow into the accommodating chamber 400, and to prevent water from flowing back into the suction pipe 411 from the water outlet of the suction pipe 411.

[0056] The sewage tank 4 also includes a filtering water absorption device 43, which is installed in the suction port 40. The filtering water absorption device 43 can absorb moisture in the gas and only allow the gas to pass through the suction port 40 to prevent moisture from entering the suction source and causing a suction source failure, thereby ensuring that the suction source works stably. In order to facilitate the installation of the filtering water absorption device 43, the upper surface of the first water retaining portion 4221 has a boss for carrying the filtering water absorption device 43, and the lower end surface of the filtering water absorption device 43 contacts the upper surface of the boss.

[0057] When the height of the filtering water absorbing device 43 is relatively high, in order to facilitate the installation of the filtering water absorbing device 43, the fixing structure 421 has an upwardly extending surrounding wall 4213 at its suction port 40, and the filtering water absorbing device 43 is interference fit with the surrounding wall 4213 to achieve a limited installation of the filtering water absorbing device 43.

[0058] The cover body 42 further includes a cover 424, which is sleeved outside the fixed structure 421 and fixed on the fixed structure 421. The cover 424 can limit the filter and water absorption device 43 to prevent the filter and water absorption device 43 from falling off from the suction port 40. In addition, the cover 424 can also be used to detachably install the sewage tank 4 in the receiving groove of the fuselage 1. In one embodiment, the cover 424 has an elastic locking tongue, and the receiving groove of the fuselage body has a locking groove. The elastic locking tongue can be stuck in the locking groove, so that the sewage tank 4 is installed in the receiving groove of the fuselage 1.

[0059] In one embodiment, the filtering and absorbing device 43 is preferably a filtering sponge, which can not only ensure the passage of gas, but also absorb moisture in the gas to prevent moisture from entering the suction source, reduce the impact of moisture on the suction source, and ensure the stability of the suction source.

[0060] The fixed structure 421 includes a disk body 4211 and a fixed column 4212 fixed to the upper surface of the disk body 4211. The outer peripheral wall of the disk body 4211 is sealed with the inner wall of the opening, and the fixed column 4212 is fixedly connected to the cover 424. In one embodiment, the number of the fixed columns 4212 is four, and the four fixed columns 4212 are evenly arranged on the disk body 4211. Similarly, the cover 424 has connection holes corresponding to the four fixed columns 4212. Bolts pass through the connection holes and are threadedly connected to the fixed columns 4212, so as to fix the cover 424 to the fixed structure 421.

[0061] The sewage tank 4 also includes a water level monitoring sensor, which is installed on the disk 4211 and extends into the accommodating cavity 400 to monitor the water level in the sewage tank 4 to remind the user to remove the sewage in the sewage tank 4 in time.

[0062] In order to further prevent the water drawn into the sewage tank 4 from the suction pipe 411 from pouring into the suction port 40, the upper end of the suction pipe 411 has a guide surface 4111. Furthermore, the side of the water outlet of the suction pipe 411 close to the first water retaining enclosure 4222 has a guide surface 4111, and the guide surface 4111 is inclined from bottom to top in a direction away from the first water retaining enclosure 4222. For the surface cleaning device, the guide surface 4111 is inclined from bottom to top in a direction away from the fuselage 1 to guide the water at the water outlet of the suction pipe 411, so that the water is sprayed in the direction of the second water retaining enclosure 4223, and flows downward under the action of the second water retaining enclosure 4223, so as to prevent the water from flowing upward directly into the suction port 40. In addition, the guide surface 4111 and the second water retaining enclosure 4223 can also play a role in gas-water separation, and separate the water drawn from the suction pipe 411 from gas and water.

[0063] The cover body 42 also includes a second water retaining structure 423, which includes a connecting portion 4231 and a second water retaining portion 4232. The upper end of the connecting portion 4231 is fixedly connected to the first water retaining surrounding portion 4222, and the lower end thereof is connected to the second water retaining portion 4232. The second water retaining portion 4232 is located below the second water retaining surrounding portion 4223, and divides the accommodating chamber 400 into a first water storage chamber 401 and a second water storage chamber 402 that are arranged and connected up and down. When the user holds the handle 2 to push the surface cleaning device to work, the angle between the body 1 of the surface cleaning device and the ground is generally greater than 30°. At this time, after water enters the water storage chamber from the water outlet of the suction pipe 411, it first enters the first water storage chamber 401. Since the second water storage chamber 402 is located below the first water storage chamber 401, water can smoothly flow from the first water storage chamber 401 to the second water storage chamber 402 under the action of its gravity.

[0064] Furthermore, the connection part 4231 of the second water retaining structure 423 is fixed to the lower end of the first water retaining surrounding part 4222, and the blocking member 42221 is installed at the upper end of the connection part 4231, and the blocking member 42221 can abut against the inner wall of the body to prevent the water in the sewage tank 4 from flowing into the suction port 40 from there. There is a gap between the part of the lower end of the connection part 4231 without the blocking member 42221 and the inner wall of the body, and the gap is used to connect the suction port 40 and the accommodating chamber 400, so as to ensure that the suction source can extract the gas in the accommodating chamber 400 through the suction port 40.

[0065] The outer wall of the second water retaining portion 4232 is sealed with the inner wall of the accommodating chamber 400, and there is a gap between the outer wall of the second water retaining portion 4232 and the outer wall of the suction pipe 411, which connects the first water storage chamber 401 and the second water storage chamber 402. When the user rotates the body 1 to be roughly parallel to the ground in order to clean a special position, due to the effect of the second water retaining structure 423, the water in the second water storage chamber 402 will not directly flow into the first water storage chamber 401, which can prevent the water from shaking randomly in the water storage chamber, and further prevent the water from flowing toward the suction port 40.

[0066] In this embodiment, the fixed structure 421 and the first water retaining structure 422 are an integrated structure, the second water retaining structure 423 is detachably mounted on the first water retaining structure 422 by bolts, and the cover 424 is detachably mounted on the fixed structure 421 by bolts.

[0067] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the above embodiments do not limit the present application in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present application.

Claims

1. A sewage tank for a surface cleaning device, characterized in that: The sewage tank comprises: A body (41) comprises a suction pipe (411) and a shell (412) arranged around the suction pipe (411), the bottom wall or the side wall of the shell (412) being sealed and connected to the outer wall of the suction pipe (411), the top of the shell (412) having an opening, and the inner wall of the shell (412) and the outer wall of the suction pipe (411) forming a receiving cavity (400); The cover body (42) comprises a fixing structure (421) and a first water retaining structure (422) connected to the fixing structure (421), the outer peripheral wall of the fixing structure (421) is sealed with the inner wall of the opening, the fixing structure (421) has a suction port (40) running through its thickness direction, the first water retaining structure (422) comprises a first water retaining portion (4221) and a water retaining surrounding portion, the first water retaining portion (4221) blocks below the suction port (40) and is located above the suction pipe (411), the water retaining surrounding portion is arranged around the first water retaining portion (4221) and extends downward, and an air passage for connecting the suction port (40) with the accommodating cavity is provided between the water retaining surrounding portion and the inner side wall of the main body (41).

2. The sewage tank according to claim 1, characterized in that: The water retaining enclosure comprises a first water retaining enclosure (4222), and a blocking member (42221) is provided at the lower end of the first water retaining enclosure (4222) enclosing the water outlet of the suction pipe (411), and the blocking member (42221) prevents liquid from flowing out from between the first water retaining enclosure (4222) and the inner side wall of the body (41).

3. The sewage tank according to claim 2, characterized in that: The air passage is formed between the inner wall of the body (41) and the surface of the blocking member (42221) away from the suction pipe (411).

4. The sewage tank according to claim 2, characterized in that: A guide surface (4111) is provided on one side of the water outlet of the suction pipe (411) close to the first water retaining enclosure (4222), and the guide surface (4111) is inclined from bottom to top in a direction away from the first water retaining enclosure (4222).

5. The sewage tank according to claim 2, characterized in that: The water retaining enclosure also includes a second water retaining enclosure (4223), the lower end surface of the second water retaining enclosure (4223) being lower than the water outlet of the suction pipe (411) and surrounding the other side of the suction pipe (411).

6. The sewage tank according to claim 5, characterized in that: The first water retaining portion (4221) is inclined downward in a direction from the second water retaining enclosure portion (4223) to the first water retaining enclosure portion (4222).

7. The sewage tank according to claim 5, characterized in that: The cover body (42) further comprises a second water retaining structure (423), the second water retaining structure (423) comprising a connecting portion (4231) and a second water retaining portion (4232), the upper end of the connecting portion (4231) being fixedly connected to the first water retaining surrounding portion (4222), and the lower end of the connecting portion (4231) being connected to the second water retaining portion (4232), the second water retaining portion (4232) being located below the second water retaining surrounding portion (4223), and dividing the accommodating cavity (400) into a first water storage cavity (401) and a second water storage cavity (402) which are arranged up and down and are in communication with each other.

8. The sewage tank according to claim 7, characterized in that: The outer wall of the second water retaining portion (4232) is sealed with the inner wall of the accommodating chamber (400), and a gap is provided between the outer wall of the second water retaining portion (4232) and the outer wall of the suction pipe (411) to connect the first water storage chamber (401) and the second water storage chamber (402).

9. The sewage tank according to claim 1, characterized in that: The sewage tank further comprises a filtering water absorbing device (43), and the upper surface of the first water retaining portion (4221) comprises a boss for supporting the filtering water absorbing device (43).

10. A surface cleaning device, characterized in that: It comprises a body (1) and a sewage tank as claimed in any one of claims 1 to 9, wherein the body (1) has a receiving groove, and the sewage tank is detachably installed in the receiving groove.

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