Surface cleaning device with dirty liquid barrel assembly

Abstract

The surface cleaning device comprises a machine body and a ground brush which are pivotally connected with each other, the ground brush comprises a sewage suction opening, the machine body comprises a suction assembly and a sewage barrel, the sewage barrel is divided into a first cavity and a second cavity through a partition plate, the first cavity is communicated with a sewage inlet pipe and the suction assembly, and the second cavity is communicated with a sewage outlet pipe. The partition plate is provided with a liquid inlet channel communicated with the first cavity and the second cavity, the liquid inlet channel is provided with a liquid inlet located in the first cavity and a liquid outlet located in the second cavity, the liquid inlet is located in the edge of the partition plate, the liquid outlet is located in the center area of the partition plate, the dirty liquid barrel is in a flat state, and the liquid inlet is lower than the liquid outlet. When the dirty liquid barrel lies flat, the liquid outlet is located in the central area of the partition plate, and the water level of the dirty liquid in the second cavity is below the liquid outlet, so that even if the dirty liquid barrel shakes, the dirty liquid in the second cavity is difficult to submerge the liquid outlet and flow back into the first cavity through the liquid inlet channel; and the probability that the soiling solution in the second cavity flows backwards into the first cavity when the soiling solution barrel lies flat is greatly reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of cleaning appliances, and particularly relates to a surface cleaning device with a dirty liquid bucket assembly. BACKGROUND

[0002] At present, when a surface cleaning device is used for cleaning, a cleaning element is generally used to roll on the surface to be cleaned, and cleaning liquid is sprayed on the surface to be cleaned to assist in removing dirt, and then a suction assembly is used to suck the dirty liquid at the cleaning element into a dirty liquid bucket of the cleaning device.

[0003] However, when a user is cleaning, for a low-height area to be cleaned such as the bottom of a table or the bottom of a bed, the body needs to be tilted so that the cleaning element can extend into the deep part of the low space for cleaning. In the working state of the tilted body, the dirty liquid bucket also tilts with the body, and the position of the suction assembly of the body is lowered. The tilting of the body can cause the dirty liquid in the dirty liquid bucket to shake, which can easily cause the dirty liquid to flow back to the suction assembly, resulting in water entering the suction assembly, affecting the normal work of the suction assembly, and even causing damage to the suction assembly. When the body is lying on the surface to be cleaned, the suction assembly and the dirty liquid bucket on the body are at the same height, and the above-mentioned problem occurs more frequently, which not only reduces the service life of the cleaning machine, but also reduces the user experience.

[0004] To solve the technical problem, the prior art proposes the following technical solution: the dirty liquid barrel is divided into a first cavity located above and a second cavity located below by a partition plate, the dirty liquid inlet pipe extends upward from the second cavity into the first cavity, the first cavity and the second cavity are communicated through a liquid inlet opening formed on the partition plate, the first cavity is provided with a ventilation cavity communicated with the suction assembly, the first cavity is communicated with the dirty liquid suction port, the suction assembly works to remove the gas in the first cavity through the ventilation cavity, so that a negative pressure is generated in the first cavity, and the dirty liquid of the dirty liquid suction port is sucked into the first cavity through the dirty liquid inlet pipe under the action of the suction assembly; the dirty liquid in the first cavity can enter the second cavity through the liquid inlet opening, reducing the probability of the dirty liquid in the first cavity being sucked into the suction assembly in the machine body to pollute the suction assembly. However, the technology has the following defects: when the machine body is in a vertical state or a state of small inclination, since the second cavity is located below the first cavity and the liquid inlet opening is located at the top of the second cavity, the dirty liquid will flow quickly to the second cavity through the liquid inlet opening under the action of gravity, even if the dirty liquid in the dirty liquid barrel shakes, it is difficult to overcome the gravity and flow back to the first cavity through the liquid inlet opening, which will not affect the stable suction of the surface cleaning device; when the user cleans the vertical height limited surface to be cleaned such as the bottom of a sofa or a bed, the machine body needs to be inclined to be in a lying state or the machine body has a large inclination angle to clean the surface to be cleaned. Since the angle between the dirty liquid barrel and the ground is small or even close to parallel to the ground at this time, the vertical height of the first cavity, the second cavity and the suction assembly is close or even tends to be the same, and the liquid inlet opening is located at the side of the second cavity at this time. If the user repeatedly pushes and pulls the machine body to clean the surface to be cleaned, the dirty liquid in the second cavity will shake a lot, so that the dirty liquid in the second cavity enters the first cavity from the liquid inlet opening under the action of shaking, causing the dirty liquid to accumulate in the first cavity and increasing the probability of the dirty liquid in the first cavity entering the suction assembly, reducing the service life of the suction assembly. Utility model content

[0005] The present application provides a surface cleaning device with a dirty liquid barrel assembly to solve the technical problem that the dirty liquid in the second cavity of the conventional surface cleaning device easily flows back to the first cavity through the liquid inlet opening when the machine body is inclined at a large angle or in a lying state, causing the dirty liquid to accumulate in the first cavity and pollute the suction device.

[0006] The technical solution adopted by the present application is:

[0007] A surface cleaning device with a dirty liquid tank assembly includes a main body and a floor brush pivotally connected to each other, the floor brush includes a dirty liquid suction port, the main body includes a suction assembly and a dirty liquid tank, the dirty liquid tank is divided into a first chamber and a second chamber by a partition, the first chamber is in communication with a dirty liquid inlet pipe and the suction assembly, the partition is provided with a liquid inlet passage in communication with the first chamber and the second chamber, the liquid inlet passage has a liquid inlet opening in the first chamber and a liquid outlet opening in the second chamber, the liquid inlet opening is located at the edge of the partition, and the liquid outlet opening is located at the central region of the partition, the dirty liquid tank is in a flat state, and the liquid inlet opening is lower than the liquid outlet opening.

[0008] The surface cleaning device described in the present application also includes the following additional technical features:

[0009] The partition constitutes at least part of the wall of the liquid inlet passage in the extension direction of the liquid inlet passage.

[0010] The liquid inlet opening is a through hole provided on the partition, the liquid inlet passage includes a cover located at the top of the second chamber, one end of the cover covers the liquid inlet opening, and the other end extends along the lower surface of the partition to the central region of the partition, and the liquid outlet opening is provided on the cover.

[0011] The bottom of the partition is provided with a downwardly extending sealing plate, and the sealing plate, the cover and the partition cooperatively form the liquid inlet passage.

[0012] The liquid inlet passage is inclined from the liquid inlet opening to the liquid outlet opening, so that the liquid outlet opening is located at the bottom of the liquid inlet passage, or the partition is configured to at least extend from the liquid inlet opening to the liquid outlet opening in correspondence with the liquid inlet passage, so that the liquid outlet opening is located at the bottom of the liquid inlet passage.

[0013] The liquid inlet opening is located at the edge of the partition in the front-rear direction and at the middle of the partition in the left-right direction, the dirty liquid inlet pipe extends upward from the bottom of the second chamber and penetrates the partition to extend into the first chamber, and the liquid inlet passage at least partially surrounds the dirty liquid inlet pipe.

[0014] The dirty liquid inlet pipe is arranged close to the front wall of the dirty liquid tank, and the liquid outlet opening is arranged to be not lower than the bottom of the dirty liquid inlet pipe when the dirty liquid tank is flat.

[0015] The partition is provided with a gas suction port in communication with the second chamber, the suction assembly is in communication with the second chamber through the gas suction port, and the gas suction port and the liquid outlet opening are located on the two sides of the dirty liquid inlet pipe, respectively.

[0016] The liquid outlet opening and the gas suction port are arranged in a staggered manner, and the openings of the liquid outlet opening and the gas suction port face different directions.

[0017] An angle between a plane where a central axis of the liquid inlet is located and a plane where a central axis of the liquid outlet is located is alpha, 0°≤alpha<90°.

[0018] Thanks to the above technical solutions, the application has the following beneficial effects:

[0019] 1. The surface cleaning device of the application comprises a dirty liquid tank, which is divided into a first cavity and a second cavity in communication through a liquid inlet channel by a partition plate. During cleaning, the suction assembly sucks the gas in the first cavity to form a pressure difference between the first cavity and the suction port, and the dirty liquid of the suction port is sucked into the first cavity through the suction pipe by the pressure difference. The dirty liquid in the first cavity can flow into the second cavity through the liquid inlet channel to reduce the amount of dirty liquid in the first cavity, thereby reducing the probability of backflow of the dirty liquid in the first cavity into the suction assembly due to shaking of the machine body or other factors. On this basis, the liquid inlet is arranged at the edge of the partition plate, and the liquid outlet is arranged at the center area of the partition plate. On the one hand, when the dirty liquid tank is lying flat, since the liquid outlet is located at the center area of the partition plate, the water level of the dirty liquid in the second cavity is generally below the liquid outlet. Even if the dirty liquid tank shakes, the dirty liquid in the second cavity is difficult to overflow the liquid outlet and flow back into the first cavity through the liquid inlet channel, greatly reducing the probability of backflow of the dirty liquid in the second cavity into the first cavity when the dirty liquid tank is lying flat. On the other hand, the liquid inlet is located at the edge of the partition plate, so that no matter whether the dirty liquid tank is standing or lying, the dirty liquid in the first cavity can cover the liquid inlet and quickly flow into the second cavity through the liquid inlet channel, thereby reducing the residence time of the dirty liquid in the first cavity and reducing the probability of interference of the dirty liquid in the first cavity with the suction assembly, thereby providing protection for stable operation of the suction assembly.

[0020] 2. As a preferred embodiment of the application, along the extension direction of the liquid inlet channel, the partition plate constitutes at least part of the wall of the liquid inlet channel, so that the partition plate not only has the function of separating the dirty liquid tank to form the first cavity and the second cavity, but also integrates the function of cooperating to form the liquid inlet channel, with high degree of functional integration. In addition, as part of the wall of the liquid inlet channel, the partition plate can be used as the basis for manufacturing the liquid inlet channel during production and processing of the liquid inlet channel, thereby reducing the difficulty of forming the liquid inlet channel. Furthermore, as part of the wall of the liquid inlet channel, the partition plate helps to improve the connection tightness of the liquid inlet channel and the partition plate, and helps to increase the structural strength and stability of the liquid inlet channel.

[0021] 3. As a preferred embodiment of the present application, the liquid inlet is arranged as a through hole on the partition plate, which reduces the manufacturing difficulty of the liquid inlet, and the flow speed of the dirty liquid in the first cavity to the liquid inlet channel can be controlled according to the size of the opening, so as to adapt to different suction speeds in the first cavity. On this basis, the cover and the partition plate cooperate to form the liquid inlet channel, which reduces the manufacturing difficulty of the liquid inlet channel, and the cross-sectional size of the liquid inlet channel can be adjusted by changing the size of the cover. When the suction speed of the dirty liquid in the first cavity is relatively fast, and the dirty liquid in the first cavity needs to enter the surface cleaning device of the second cavity at a relatively fast speed, a larger cover can be selected to form a larger liquid inlet channel, so that the dirty liquid in the first cavity can quickly enter the second cavity through the liquid inlet channel. Furthermore, the liquid outlet is arranged on the cover, which facilitates the adjustment of the extension direction of the cover, so that the liquid outlet is more easily arranged in the central area of the partition plate, further reducing the forming difficulty of the liquid inlet channel.

[0022] 4. As a preferred embodiment of the present application, the liquid inlet channel is arranged to be inclined from the liquid inlet to the liquid outlet, so that the liquid outlet is located at the bottom of the liquid inlet channel. After the dirty liquid in the first cavity enters the liquid inlet channel through the liquid inlet, it can more smoothly move along the inclined liquid inlet channel under the action of its own gravity and flow out through the liquid outlet located at the bottom of the liquid inlet channel. The partition plate is arranged to be inclined and extended from the liquid inlet to the liquid outlet at least at the position corresponding to the liquid inlet channel, so that the liquid outlet is located at the bottom of the liquid inlet channel. Since the partition plate is at least part of the wall of the liquid inlet channel, when the partition plate is inclined and extended, the liquid inlet channel will also be inclined and extended from the liquid inlet to the liquid outlet. After the dirty liquid in the first cavity enters the liquid inlet channel through the liquid inlet, it can more smoothly move along the inclined liquid inlet channel under the action of its own gravity and flow out through the liquid outlet located at the bottom of the liquid inlet channel, improving the smoothness of the flow of the dirty liquid in the first cavity to the second cavity.

[0023] 5. As a preferred embodiment of the present application, the liquid inlet is arranged at the middle of the edge of the partition plate. When the body is inclined in the left-right direction, even if the dirty water in the first cavity is offset in the left-right direction, there is a high probability that it can cover the liquid inlet located in the middle of the partition plate and enter the liquid inlet channel through the liquid inlet, thereby improving the stability of the flow of the dirty liquid in the first cavity to the second cavity. The sewage inlet pipe is arranged to pass through from the end of the partition plate away from the liquid inlet, which can avoid the interference between the sewage inlet pipe and the liquid inlet, and reasonably arrange the internal space of the body. On this basis, the liquid inlet channel at least partially surrounds the sewage inlet pipe, which can reduce the space occupation of the liquid inlet channel to the sewage inlet pipe, avoid the interference between the sewage inlet pipe and the liquid inlet channel, and make the liquid outlet of the liquid inlet channel more easily arranged in the central area of the partition plate, which is helpful to optimize the structural design of the liquid inlet channel.

[0024] 6. As a preferred embodiment of the present application, the partition plate is provided with an air suction port communicating with the second cavity, so that the suction assembly can suck the air in the second cavity through the air suction port to reduce the air pressure in the second cavity, thereby forming a pressure difference between the second cavity and the first cavity and assisting the suction of the dirty liquid in the first cavity through the pressure difference, increasing the flow speed of the dirty liquid in the first cavity to the second cavity, reducing the residence time of the dirty liquid in the first cavity, and then reducing the probability of the dirty liquid in the first cavity interfering with the suction assembly due to shaking; and the air suction port and the liquid outlet are arranged on the two sides of the dirty liquid inlet pipe respectively, so that the opening positions on the partition plate are staggered with each other, avoiding the reduction of the structural strength of the partition plate caused by dense openings in a small range.

[0025] 7. As a preferred embodiment of the present application, when the dirty liquid in the liquid inlet channel flows out of the liquid outlet, the dirty liquid is less affected by the suction force of the air suction port due to the staggered arrangement of the liquid outlet and the air suction port, and is not easily sucked into the air suction port, thereby reducing the probability of the dirty liquid entering the suction assembly through the air suction port; on this basis, since the opening directions of the liquid outlet and the air suction port are different, the dirty liquid flowing out of the liquid outlet is further affected by the suction force of the air suction port, thereby providing protection for the stable work of the suction assembly. BRIEF DESCRIPTION OF DRAWINGS

[0026] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and the descriptions thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0027] Figure 1 are schematic diagrams of the surface cleaning device in an inclined working state and a flat lying working state;

[0028] Figure 2 is a structural schematic diagram of the dirty liquid bucket in embodiment one;

[0029] Figure 3 is a structural schematic diagram of the dirty liquid bucket in embodiment one; Figure 2 is a sectional view of the dirty liquid bucket A-A direction in embodiment one;

[0030] Figure 4 is a structural schematic diagram of the dirty liquid bucket in embodiment one; Figure 1 ;

[0031] Figure 5 is a structural schematic diagram of the dirty liquid bucket in embodiment one; Figure 2 ;

[0032] Figure 6 is a structural schematic diagram of the dirty liquid bucket in embodiment one; Figure 3 ;

[0033] Figure 7 is a sectional view of the dirty liquid bucket in embodiment one;

[0034] Figure 8 Figure 6 is a bottom view of the dirty liquid tank part structure in Example 1;

[0035] Figure 9 Figure 7 is another embodiment of the liquid inlet channel and liquid outlet in Example 1;

[0036] Figure 10 Figure 8 is a structure diagram of the dirty liquid tank part structure in Example 4 Figure 1 ;

[0037] Figure 11 Figure 9 is a structure diagram of the dirty liquid tank part structure in Example 4 Figure 2 .

[0038] Wherein:

[0039] 1 body, 11 suction assembly, 12 dirty liquid tank, 121 first cavity, 122 second cavity; 123 air cavity, 1231 gas-liquid separation device, 1232 air outlet channel, 124 liquid level electrode;

[0040] 2 floor brush; 21 cleaning roller;

[0041] 3 partition, 31 sealing plate, 311 first sealing step, 32 air outlet, 33 positioning column, 34 avoiding space;

[0042] 4 liquid inlet channel, 41 liquid inlet, 42 liquid outlet, 43 cover, 431 positioning ear plate;

[0043] 5 dirty liquid inlet pipe;

[0044] 6 solid-liquid separation plate. DETAILED DESCRIPTION

[0045] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail with reference to the accompanying drawings.

[0046] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can also be implemented in other ways different from those described herein, therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features in each embodiment can be combined with each other without conflict.

[0047] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation of the present application.

[0048] In this application, unless otherwise clearly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection, or communication; it can be directly connected, or indirectly connected through intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0049] In this application, unless otherwise clearly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the application. In the description of the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0050] Embodiment one:

[0051] The surface cleaning device includes a handheld cleaning machine such as a scrubber, a vacuum cleaner, etc., and a self-moving cleaning machine such as a sweeping and mopping robot, a mopping robot, etc. Embodiment one takes the scrubber as an example to illustrate the present scheme, and those skilled in the art can understand that the present scheme can also be applied to any one of the above surface cleaning devices.

[0052] As the surface cleaning device of the utility model, as shown in Figure 1 The machine body 1 has three working states, i.e. upright stop state, inclined working state and flat lying working state, as shown in Figure 1The machine body 1 is in the inclined working state and the lying working state respectively, and the dirty liquid barrel 12 also has two states, the inclined state and the lying state, following the machine body 1. The ground brush 2 is provided with a dirty liquid suction port and a cleaning roller 21, the dirty liquid suction port is provided with a dirty liquid scraping piece and a water supply port communicated with a water supply system, the dirty liquid suction system comprises the suction assembly 11, the dirty liquid barrel 12 and a dirty liquid suction pipeline connecting the dirty liquid suction port and the dirty liquid barrel 12, the dirty liquid suction port is arranged behind the cleaning roller 21, the suction assembly 11 and a battery pack are arranged in the machine body 1, the dirty liquid barrel 12 is arranged on the machine body 1, and the dirty liquid barrel 12 is provided with the dirty liquid inlet pipe 5. In the first embodiment, the dirty liquid inlet pipe 5 is arranged in the dirty liquid barrel 12, and the suction assembly 11 is a vacuum motor in the embodiment. The cleaning roller 21 comprises a roller and a cleaning cloth sleeved outside the roller, and the cleaning cloth is provided with tufts, the dirty liquid barrel 12 is divided into a first cavity 121 and a second cavity 122 by the partition plate 3, as shown in Figures 2 to 5 The dirty liquid barrel 12 comprises a ventilation cavity 123 arranged in the first cavity 121, and the ventilation cavity 123 is provided with a gas-liquid separation device 1231, which can be preferably selected from Hepar; the ventilation cavity 123 is also communicated with two pairs of gas outlet channels 1232, the gas outlet channels 1232 are respectively communicated with the first cavity 121 and the ventilation cavity 123, and the suction end of the suction assembly 11 is communicated with the ventilation cavity 123, so that the gas in the first cavity 121 is sequentially sucked through the ventilation cavity 123 and the gas outlet channels 1232. When the surface cleaning device works, the water supply system supplies water through the water supply port to wet the cleaning cloth on the cleaning roller 21, the cleaning roller 21 rotates, the cleaning cloth and the tufts thereof continuously wipe the surface to be cleaned, the dirty liquid scraping piece scrapes the dirty liquid on the cleaning cloth and the tufts thereof, the suction assembly 11 works to suck away the airflow in the first cavity 121, so that the negative pressure is formed in the first cavity 121, the dirty liquid enters the dirty liquid inlet pipe 5 through the dirty liquid suction port and the dirty liquid suction pipeline, is sprayed from the pipe opening of the dirty liquid inlet pipe 5 and falls into the first cavity 121, at the same time, the dirty liquid in the first cavity 121 can enter the second cavity 122 through the liquid inlet channel 4, and the dirty liquid barrel 12 is also provided with a liquid level electrode 124 for detecting whether the dirty liquid reaches the liquid full state, when the dirty liquid in the first cavity 121 and / or the second cavity 122 is in the liquid full state, the surface cleaning device alarms to prompt the customer to pour out the dirty liquid in the dirty liquid barrel 12. It should be noted that the liquid full state here does not mean that the first cavity 121 and / or the second cavity 122 is completely filled with the dirty liquid, but means that the dirty liquid reaches the liquid level warning line of the first cavity 121 and / or the second cavity 122, that is, the dirty liquid is in the liquid full state.

[0053] In the first embodiment, as shown in Figures 3 to 5 The partition plate 3 is provided with the liquid inlet channel 4 communicated with the first cavity 121 and the second cavity 122, the liquid inlet channel 4 has a liquid inlet port 41 located in the first cavity 121 and a liquid outlet port 42 located in the second cavity 122, the liquid inlet port 41 is located at the edge of the partition plate 3, the liquid outlet port 42 is located at the central region of the partition plate 3, and the dirty liquid barrel 12 is in the lying state, the liquid inlet port 41 is lower than the liquid outlet port 42.

[0054] Figure 3 The flow path of the dirty liquid in the dirty liquid tank 12 is shown in the figure, and the line with a hollow arrow represents the flow path of the dirty liquid. The dirty liquid enters the first cavity 121 through the dirty liquid inlet pipe 5, enters the liquid inlet passage 4 through the liquid inlet 41, and enters the second cavity 122 through the liquid outlet 42.

[0055] The surface cleaning device of the present application comprises a dirty liquid tank 12, which is divided into a first cavity 121 and a second cavity 122 by the partition plate 3 and is connected through the liquid inlet passage 4. During cleaning, the suction assembly 11 sucks the gas in the first cavity 121 to form a pressure difference between the first cavity 121 and the dirty liquid suction, and the dirty liquid suction is sucked into the first cavity 121 through the dirty liquid inlet pipe 5 by the pressure difference. The dirty liquid in the first cavity 121 can flow into the second cavity 122 through the liquid inlet passage 4 to reduce the amount of dirty liquid in the first cavity 121, thereby reducing the probability of backflow of the dirty liquid in the first cavity 121 caused by shaking of the machine body 1 or other factors. On this basis, the liquid inlet 41 is arranged at the edge of the partition plate 3, and the liquid outlet 42 is arranged in the central area of the partition plate 3. On the one hand, when the dirty liquid tank 12 is lying flat, since the liquid outlet 42 is located in the central area of the partition plate 3, the water level of the dirty liquid in the second cavity 122 is generally below the liquid outlet 42. Even if the dirty liquid tank 12 shakes, the dirty liquid in the second cavity 122 is difficult to overflow the liquid outlet 42 and flow back into the first cavity 121 through the liquid inlet passage 4, greatly reducing the probability of backflow of the dirty liquid in the second cavity 122 into the first cavity 121 when the dirty liquid tank 12 is lying flat. On the other hand, the liquid inlet 41 is located at the edge of the partition plate 3, so that no matter whether the dirty liquid tank 12 is standing or lying, the dirty liquid in the first cavity 121 can cover the liquid inlet 41 and quickly flow into the second cavity 122 through the liquid inlet passage 4, thereby reducing the probability of interference of the dirty liquid in the first cavity 121 with the suction assembly 11 and providing protection for the stable operation of the suction assembly 11.

[0056] In the first embodiment, the liquid outlet 42 is located in the central area of the partition plate 3, and the specific position is determined according to the shape of the partition plate 3. For example, when the partition plate 3 is circular, the liquid outlet 42 covering the center of the partition plate 3 or being located around the center can be regarded as the liquid outlet 42 being located in the central area of the partition plate 3. When the partition plate 3 is rectangular or square, the liquid outlet 42 covering the centroid of the partition plate 3 or being located around the centroid can be regarded as the liquid outlet 42 being located in the central area of the partition plate 3. Moreover, the lying state of the dirty liquid tank 12 in the first embodiment does not mean that the dirty liquid tank 12 is completely parallel to the ground. It can also mean that the dirty liquid tank 12 still has a certain angle with the ground. In the first embodiment, when the angle α between the dirty liquid tank 12 and the ground satisfies α≤25°, the dirty liquid tank 12 can be regarded as being in a lying state.

[0057] Preferably, the first cavity 121 is provided with a solid-liquid separation plate 6, and the liquid inlet 41 and the outlet end of the sewage inlet pipe 5 are respectively located on two sides of the solid-liquid separation plate 6. The solid-liquid separation plate 6 can separate the solid dirt in the sewage, and only the liquid dirt in the sewage can pass through, preventing the solid dirt from blocking the liquid inlet 41 and ensuring the smooth flow of the sewage in the first cavity 121 to the second cavity 122.

[0058] As a preferred embodiment of the present practical example, the partition plate 3 constitutes the entire top wall of the liquid inlet channel 4 along the extension direction of the liquid inlet channel 4.

[0059] Along the extension direction of the liquid inlet channel 4, the partition plate 3 constitutes the entire top wall of the liquid inlet channel 4, so that the partition plate 3 further integrates the function of cooperating to form the liquid inlet channel 4 on the basis of the function of separating the sewage bucket 12 to form the first cavity 121 and the second cavity 122, and the degree of functional integration is high. In addition, as the top wall of the liquid inlet channel 4, the partition plate 3 can be used as the basis for manufacturing the liquid inlet channel 4, which reduces the difficulty of forming the liquid inlet channel 4. Furthermore, as the top wall of the liquid inlet channel 4, the partition plate 3 helps to improve the connection tightness of the liquid inlet channel 4 and the partition plate 3, and helps to increase the structural strength and stability of the liquid inlet channel 4.

[0060] As a preferred example of the present embodiment, as shown in Figures 4 to 6 the liquid inlet 41 is a through hole provided on the partition plate 3, the liquid inlet channel 4 includes a cover shell 43 located at the top of the second cavity 122, one end of the cover shell 43 covers the liquid inlet 41, and the other end extends along the lower surface of the partition plate 3 to the central area of the partition plate 3, and the liquid outlet 42 is provided on the cover shell 43.

[0061] The liquid inlet 41 is provided as a through hole on the partition plate 3, which reduces the manufacturing difficulty of the liquid inlet 41, and can control the flow speed of the sewage in the first cavity 121 into the liquid inlet channel 4 according to the size of the hole, to adapt to different sewage suction speeds in the first cavity 121. On this basis, the cover shell 43 cooperates with the partition plate 3 to form the liquid inlet channel 4, which reduces the difficulty of manufacturing the liquid inlet channel 4, and the size of the cross section of the liquid inlet channel 4 can be adjusted by changing the size of the cover shell 43. When the sewage suction speed in the first cavity 121 is fast, the sewage in the first cavity 121 needs to enter the surface cleaning device in the second cavity 122 at a fast speed, a larger cover shell 43 can be selected to form a larger liquid inlet channel 4, so that the sewage in the first cavity 121 can quickly enter the second cavity 122 through the liquid inlet channel 4. Furthermore, the liquid outlet 42 is provided on the cover shell 43, which facilitates the adjustment of the extension direction of the cover shell 43, so that the liquid outlet 42 is more easily arranged in the central area of the partition plate 3, further reducing the difficulty of forming the liquid inlet channel 4.

[0062] As a preferred mode of the present example, as shown in Figure 6As shown, the bottom of the partition plate 3 is provided with a sealing plate 31 extending downward, and the sealing plate 31, the cover shell 43 and the partition plate 3 cooperatively form the liquid inlet channel 4.

[0063] By arranging the sealing plate 31, the sealing plate 31, the cover shell 43 and the partition plate 3 cooperatively form the liquid inlet channel 4, which can improve the sealing performance of the liquid inlet channel 4. Preferably, the sealing plate 31 is provided with a first sealing step 311, and the cover shell 43 is provided with a second sealing step 311 adapted to the first sealing step 311. When the cover shell 43 is fastened to the partition plate 3, the first sealing step 311 and the second sealing step abut and seal.

[0064] Preferably, as shown in Figure 4 , Figure 6 As shown, the bottom of the partition plate 3 is provided with a positioning protruding column 33, and the cover shell 43 is provided with a positioning lug plate 431 adapted to the positioning protruding column 33. The positioning lug plate 431 and the positioning protruding column 33 are respectively provided with a first positioning hole and a second positioning hole in opposite positions. The positioning lug plate 431 and the positioning protruding column 33 are connected by a positioning rod sequentially penetrating the first positioning hole and the second positioning hole, so as to connect the cover shell 43 and the partition plate 3.

[0065] As another preferred mode in the present example, the liquid inlet channel 4 is arranged to be inclined from the liquid inlet 41 to the liquid outlet 42, so that the liquid outlet 42 is located at the bottom of the liquid inlet channel 4.

[0066] The liquid inlet channel 4 is arranged to be inclined from the liquid inlet 41 to the liquid outlet 42, so that the liquid outlet 42 is located at the bottom of the liquid inlet channel 4. After the contaminated liquid in the first cavity 121 enters the liquid inlet channel 4 through the liquid inlet 41, it can flow more smoothly along the inclined liquid inlet channel 4 under the action of its own gravity and flow out through the liquid outlet 42 located at the bottom of the liquid inlet channel 4.

[0067] The partition plate 3 is arranged to be inclined from the liquid inlet 41 to the liquid outlet 42 at least at the position corresponding to the liquid inlet channel 4, so that the liquid outlet 42 is located at the bottom of the liquid inlet channel 4. Since the partition plate 3 is at least part of the wall of the liquid inlet channel 4, when the partition plate 3 is inclined, the liquid inlet channel 4 is also inclined from the liquid inlet 41 to the liquid outlet 42. After the contaminated liquid in the first cavity 121 enters the liquid inlet channel 4 through the liquid inlet 41, it can flow more smoothly along the inclined liquid inlet channel 4 under the action of its own gravity and flow out through the liquid outlet 42 located at the bottom of the liquid inlet channel 4, improving the smoothness of the flow of the contaminated liquid in the first cavity 121 into the second cavity 122. In this mode, the extension direction of the cover shell 43 is the same as the extension direction of the partition plate 3, so as to form the inclined liquid inlet channel 4.

[0068] The liquid inlet is located at the edge of the partition plate 3 in the front-rear direction and at the middle of the partition plate 3 in the left-right direction, the sewage inlet pipe extends upward from the bottom of the second cavity 122 and penetrates through the partition plate to the first cavity 121, and the liquid inlet channel 4 surrounds the sewage inlet pipe.

[0069] In the embodiment, the liquid inlet 41 is located at the middle of the edge of the partition plate 3, which means that the liquid inlet 41 is located at the middle of the left-right direction of the partition plate 3 as shown in the drawings. Figure 6 In the embodiment, the liquid inlet 41 is located at the middle of the edge of the partition plate 3, which means that the liquid inlet 41 is located at the middle of the left-right direction of the partition plate 3 as shown in the drawings. Figure 6 The sewage inlet pipe is not shown in the drawings, and the partition plate 3 is provided with an avoiding space 34 for the sewage inlet pipe to penetrate through, and the liquid inlet channel 4 is arranged around the avoiding space 34, which is equivalent to arranging the liquid inlet channel 4 around the sewage inlet pipe. The liquid inlet 41 is arranged at the middle of the edge of the partition plate 3, and when the machine body 1 is tilted in the left-right direction, even if the sewage in the first cavity 121 is offset in the left-right direction, the liquid inlet 41 located at the middle of the partition plate 3 can still be covered, so that the liquid inlet 41 enters the liquid inlet channel 4, thereby improving the stability of the flow of the sewage in the first cavity 121 to the second cavity 122; and the sewage inlet pipe 5 penetrates from the end of the partition plate 3 away from the liquid inlet 41, which can avoid the mutual interference between the sewage inlet pipe 5 and the liquid inlet 41, and reasonably arranges the internal space of the machine body 1; on this basis, the liquid inlet channel 4 at least partially surrounds the sewage inlet pipe 5, which can reduce the occupation of the penetrating space of the liquid inlet channel to the sewage inlet pipe 5, avoid the mutual interference between the sewage inlet pipe 5 and the liquid inlet channel, and make the liquid outlet 42 of the liquid inlet channel 4 more easily arranged in the central area of the partition plate 3, which is helpful to optimize the structural design of the liquid inlet channel 4.

[0070] As a preferred example in the embodiment, as shown in the drawings, Figure 4 , Figure 5 The sewage inlet pipe 5 is arranged close to the front wall of the sewage bucket 12, and the liquid outlet 42 is arranged flush with the bottom of the sewage inlet pipe 5 when the sewage bucket 12 is flat. That is, the liquid outlet 42 is flush with the bottom of the avoiding space 34. In this way, the height of the liquid outlet 42 when the sewage bucket 12 is flat is improved, and the distance between the upper surface of the sewage in the sewage bucket 12 and the liquid outlet 42 when the sewage bucket 12 is flat is improved, which further reduces the probability of the sewage in the second cavity 122 entering the first cavity 121 through the liquid outlet 42, thereby providing a guarantee for the working stability of the suction assembly 11.

[0071] It should be pointed out that in the example, the sewage inlet pipe 5 close to the front wall of the sewage bucket 12 can be that the sewage inlet pipe 5 abuts against the front wall of the sewage bucket 12 without any gap therebetween; or there can be a certain gap between the sewage inlet pipe 5 and the front wall of the sewage bucket 12, but when the machine body is flat, the sewage inlet pipe 5 is at the top of the sewage bucket 5, which is also regarded as that the sewage inlet pipe 5 is close to the front wall of the sewage bucket 12.

[0072] As another preferred example in the embodiment, as shown in the drawings, Figure 6 , Figure 7As shown, the partition 3 has an air extraction port 32 that communicates with the second chamber 122. The suction assembly 11 is connected to the second chamber 122 through the air extraction port 32. The air extraction port 32 and the liquid inlet 41 are located on both sides of the sewage inlet pipe 5, respectively.

[0073] The partition 3 has an air extraction port 32 that communicates with the second chamber 122, so that the suction assembly 11 can draw air from the second chamber 122 through the air extraction port 32 to reduce the air pressure in the second chamber 122. This creates a pressure difference between the second chamber 122 and the first chamber 121, and the pressure difference helps to draw out the sewage in the first chamber 121. This increases the flow rate of the sewage in the first chamber 121 into the second chamber 122, reduces the residence time of the sewage in the first chamber 121, and reduces the probability that the sewage in the first chamber 121 will interfere with the suction assembly 11 due to shaking. The air extraction port 32 and the liquid outlet 42 are respectively set on both sides of the sewage inlet pipe 5, so that the opening positions on the partition 3 are staggered, avoiding the reduction of the structural strength of the partition 3 caused by dense openings in a small area.

[0074] In this example, the suction assembly 11 can be configured to include a vacuum motor with two suction ends, one connected to the ventilation chamber 123 in the first chamber 121 for suctioning gas from the first chamber 121, and the other connected to the extraction port 32 for suctioning gas from the second chamber 122; or it can include a first vacuum motor and a second vacuum motor, with the first vacuum motor connected to the ventilation chamber 123 for suctioning gas from the first chamber 121, and the second vacuum motor connected to the extraction port 32 for suctioning gas from the second chamber 122.

[0075] Preferably, such as Figure 8 As shown, the liquid outlet 42 and the air extraction port 32 are offset, and their openings face different directions. When the waste liquid in the inlet channel 4 flows out of the liquid outlet 42, due to the offset arrangement of the liquid outlet 42 and the air extraction port 32, the waste liquid is less affected by the suction force of the air extraction port 32 and will not be easily sucked into the air extraction port 32, thus reducing the probability of the waste liquid entering the suction assembly 11 through the air extraction port 32. Furthermore, because the openings of the liquid outlet 42 and the air extraction port 32 face different directions, the influence of the suction force at the air extraction port 32 on the waste liquid flowing out of the liquid outlet 42 is further reduced, ensuring the stable operation of the suction assembly 11.

[0076] Specifically, the liquid inlet channel 4 can be configured to be obliquely cut into the liquid outlet 42 at the corresponding liquid outlet 42 in a direction away from the air extraction port 32, so that the liquid outlet 42 faces away from the air extraction port 32; or, the suction assembly 11 is connected to the second chamber 122 through the air extraction pipe, and the air extraction port 32 is opened on the side of the air extraction pipe away from the liquid outlet 42, so that the air extraction port 32 faces differently from the liquid outlet 42.

[0077] As a preferred embodiment of the first embodiment, as shown in Figure 8 The angle between the plane in which the central axis of the liquid inlet 41 lies and the plane in which the central axis of the liquid outlet 42 lies is α, 0°≤α<90°. In the present embodiment, the central axis refers to the axis that divides the projection of the liquid inlet 41 and the liquid outlet 42 towards the partition 3 into two symmetrical parts, and the angle between the planes in which the two axes lie is α. In the present embodiment, α is 60°. Taking the liquid inlet 41 as an example, when the projection of the liquid inlet 41 towards the partition 3 is circular, any straight line passing through the center of the circle is the central axis of the liquid inlet 41. When the projection of the liquid inlet 41 towards the partition 3 is rectangular, the line connecting the center of the short side of the rectangle with the center of the shape or the line connecting the center of the long side of the rectangle with the center of the shape is the central axis. In the present embodiment, the projection of the liquid inlet 41 and the liquid outlet 42 towards the partition 43 is rectangular, and the line connecting the center of the short side of the rectangle with the center of the shape is the central axis in the present embodiment.

[0078] The present application does not limit the structural form of the liquid inlet channel, and in another embodiment, the liquid inlet channel is divided into a straight section close to the liquid inlet and a surrounding section close to the liquid outlet, the straight section extends along a straight line, and the surrounding section is arranged around the sewage pipe.

[0079] The first embodiment does not limit the structural relationship between the partition and the liquid inlet channel, and in another embodiment, the partition constitutes one part of the top wall of the liquid inlet channel.

[0080] It can be understood that the present application does not limit the position of the liquid outlet 42, and the liquid inlet channel and the liquid outlet can be arranged as shown in Figure 9 The liquid inlet channel continues to extend upwards, so that when the sewage tank 12 is lying, the liquid outlet 42 is arranged to be higher than the bottom of the sewage pipe 5, which can better avoid the backflow of sewage.

[0081] Embodiment two:

[0082] The second embodiment is basically the same as the first embodiment in principle and structure, and the difference lies in that:

[0083] In the second embodiment, the partition has a certain thickness, the liquid inlet channel is a channel that penetrates the partition, the liquid inlet is located on the upper surface of the partition, and the liquid outlet is located on the lower surface of the partition.

[0084] In the second embodiment, the partition extends in the horizontal direction when the machine body is in the horizontal state.

[0085] Embodiment three:

[0086] The second embodiment is basically the same as the first embodiment in principle and structure, and the difference lies in that:

[0087] Compared with the partition plate in the first embodiment, the partition plate in the third embodiment is only inclinedly extended at the position corresponding to the liquid inlet channel, and is extended along the horizontal direction at other positions.

[0088] The fourth embodiment:

[0089] The fourth embodiment and the first embodiment are basically the same in principle and structure, and the difference is that:

[0090] The cover 43 in the fourth embodiment is a quarter circular arc structure as shown in Figure 10 、 Figure 11 The cover 43 is covered at one end of the liquid inlet 41 of the partition plate 3, and has an opening at the other end to form the liquid outlet 42.

[0091] Preferably, the cover 43 in the fourth embodiment is connected to the partition plate 3 by ultrasonic welding.

[0092] The unmentioned part in the present application can be realized by using or referring to the existing technology.

[0093] Each embodiment in the present specification is described in a progressive manner, and the same or similar parts between each embodiment can be referred to each other. Each embodiment mainly describes the difference from other embodiments.

[0094] The above is only an embodiment of the present application, and is not used to limit the present application. The present application can have various changes and variations for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the scope of claims of the present application.

Claims

1. A surface cleaning apparatus having a dirty liquid tank assembly, comprising a body and a floor brush pivotally connected to each other, the floor brush comprising a dirty air inlet, the body comprising a suction assembly, a dirty liquid tank, the dirty liquid tank being divided into a first chamber and a second chamber by a partition, the first chamber being in communication with a dirty liquid inlet pipe and the suction assembly, the partition having a liquid inlet passage opening therethrough to communicate the first chamber and the second chamber, characterised in that, The liquid inlet channel has a liquid inlet opening in the first cavity and a liquid outlet opening in the second cavity, the liquid inlet opening is located at the edge of the partition plate, and the liquid outlet opening is located at the central region of the partition plate; the dirty liquid tank is in a lying state, and the liquid inlet opening is lower than the liquid outlet opening.

2. The surface cleaning device with a dirty liquid tank assembly of claim 1, wherein, The partition plate constitutes at least part of the wall of the liquid inlet channel along the extension direction of the liquid inlet channel.

3. The surface cleaning device with a dirty liquid tank assembly of claim 2, wherein, The liquid inlet opening is a through hole provided on the partition plate, the liquid inlet channel comprises a cover shell provided at the top of the second cavity, one end of the cover shell covers the liquid inlet opening, and the other end extends along the lower surface of the partition plate to the central region of the partition plate, and the liquid outlet opening is provided on the cover shell.

4. The surface cleaning device with a dirty liquid tank assembly of claim 3, wherein, The bottom of the partition plate is provided with a downwardly extending sealing plate, and the sealing plate, the cover shell and the partition plate cooperatively define the liquid inlet channel.

5. The surface cleaning device with a dirty liquid tank assembly of claim 3, wherein, The liquid inlet channel is inclined from the liquid inlet opening to the liquid outlet opening, so that the liquid outlet opening is located at the bottom of the liquid inlet channel, or the partition plate is configured to be inclined at least from the liquid inlet opening to the liquid outlet opening corresponding to the liquid inlet channel, so that the liquid outlet opening is located at the bottom of the liquid inlet channel.

6. The surface cleaning device with a dirty liquid tank assembly of claim 1, wherein, The liquid inlet opening is located at the edge of the partition plate in the front-rear direction and at the middle of the partition plate in the left-right direction, the dirty liquid inlet pipe extends upward from the bottom of the second cavity and penetrates the partition plate to extend into the first cavity, and the liquid inlet channel at least partially surrounds the dirty liquid inlet pipe.

7. The surface cleaning device with a dirty liquid tank assembly of claim 6, wherein, The dirty liquid inlet pipe is arranged close to the front wall of the dirty liquid tank, and the liquid outlet opening is arranged to be not lower than the bottom of the dirty liquid inlet pipe when the dirty liquid tank is in a lying state.

8. The surface cleaning device with a dirty liquid tank assembly of claim 6, wherein, An air suction opening is formed in the partition plate and communicates with the second cavity, the suction assembly communicates with the second cavity through the air suction opening, and the air suction opening and the liquid outlet opening are located on opposite sides of the dirty liquid inlet pipe.

9. The surface cleaning device with a dirty liquid tank assembly of claim 8, wherein, The liquid outlet opening and the air suction opening are arranged in a staggered manner, and the openings of the liquid outlet opening and the air suction opening are directed in different directions.

10. The surface cleaning device with a dirty liquid tank assembly of claim 1, wherein, The angle between the plane in which the central axis of the liquid inlet opening is located and the plane in which the central axis of the liquid outlet opening is located is α, and 0°≤α<90°.

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