Surface cleaning machine with good dirt suction stability

Abstract

The surface cleaning machine with the good dirt suction stability comprises a machine body and a ground brush which are connected in a pivoted mode, the ground brush comprises a dirt suction opening, the machine body is provided with a first suction device, a dirt liquid barrel and a dirt suction pipe communicating with the dirt suction opening and the first suction device, and the dirt liquid barrel comprises a barrel cover and a barrel body; the barrel body comprises a first cavity and a second cavity located on one side of the lower portion of the barrel body, the first cavity comprises a liquid storage sub-cavity and a surge sub-cavity, the liquid storage sub-cavity and the second cavity are arranged side by side left and right, the surge sub-cavity is located above the liquid storage sub-cavity and the second cavity, and the first cavity communicates with the second cavity through a liquid inlet so that dirty liquid in the first cavity can flow into the second cavity through the liquid inlet; and a first air suction port of the first suction channel and an upper port of the sewage suction pipe are arranged in the surge sub-cavity. When the machine body is in a lying state or the inclination angle is large, the liquid storage pressure of the surge sub-cavity is greatly shared through the arrangement of the liquid storage sub-cavity at the moment, the accumulation probability of the dirty liquid in the surge sub-cavity is reduced, and the risk that the dirty liquid flows backwards into the suction device can be reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of cleaning appliances, and in particular relates to a surface cleaning machine with good dirt suction stability. Background Art

[0002] Current cleaning devices, such as surface cleaners, generally use cleaning elements to roll the surface to be cleaned, spray cleaning liquid on the surface to be cleaned to assist in removing dirt, and then use a suction device to pump the dirty liquid into a dirty liquid bucket of the cleaning device.

[0003] However, when the user is cleaning, for areas to be cleaned with restricted height, such as under tables and beds, the machine body needs to be tilted so that the cleaning parts can reach deeper into the low space for cleaning. When the machine body is in the tilted working state, the dirty liquid bucket also tilts with the machine body, and the suction device of the machine body is lowered. The tilt of the machine body will cause the dirty liquid in the dirty liquid bucket to shake, which may easily cause the dirty liquid to flow back into the suction device, causing water to enter the suction device, affecting the normal operation of the suction device, and even causing damage to the suction device. When the machine body lies flat on the surface to be cleaned, the suction device and the dirty liquid bucket on the machine body are at the same height, and the probability of the above problems occurring is more frequent, which not only reduces the service life of the cleaning machine but also affects the user experience.

[0004] To solve this technical problem, the following technical solution is proposed in the prior art: the sewage barrel is configured to include a first chamber located above and a second chamber located below, which are interconnected, and a sewage inlet pipe extending upward from the second chamber into the first chamber. The first chamber and the second chamber are connected through a liquid inlet. The first chamber is provided with a ventilation chamber connected to a suction device. The first chamber is connected to the sewage suction port. When the suction device is in operation, the gas in the first chamber is sucked away through the ventilation chamber, thereby generating a negative pressure in the first chamber. The sewage from the sewage suction port is sucked into the first chamber through the sewage inlet pipe under the action of the suction device. A suction channel is provided to connect the suction device and the second chamber. The gas in the second chamber is sucked through the suction channel to reduce the air pressure in the second chamber, so that the second chamber can absorb the sewage in the first chamber through the liquid inlet, thereby reducing the probability that the sewage in the first chamber is sucked into the suction device in the fuselage and thereby contaminating the suction device. However, this technology has the following drawbacks: when the body is in an upright position or a slightly tilted position, since the second chamber is located below the first chamber and the liquid inlet is located on the top wall of the second chamber, dirt will accumulate on the top wall of the second chamber due to gravity. When the suction device is operating, although the dirty liquid can be drawn into the second chamber through the liquid inlet by gravity and the pressure difference between the first and second chambers, if a large amount of dirty liquid quickly flows into the first chamber, if the liquid inlet is relatively small or if the liquid inlet is partially blocked by dirt, the dirty liquid in the first chamber cannot quickly flow into the second chamber through the liquid inlet even under the effects of gravity and the negative pressure of the second chamber. Consequently, the dirty liquid will temporarily accumulate in the first chamber. At this time, if the user pushes or pulls the body, causing the dirty liquid bucket to shake, the dirty liquid will still splash and enter the body through the vent cavity, causing contamination of the suction device. When cleaning surfaces with limited vertical height, such as sofas and bed bottoms, users need to tilt the body so that it is in a flat position or at a large tilt angle to clean the surface. Since the angle between the dirty liquid bucket and the ground is small or even nearly parallel to the ground, the vertical heights of the first chamber, the second chamber, and the suction device are relatively close, or even approaching the same height. At this time, the liquid inlet is located on the side of the second chamber, and the power for the dirty liquid in the first chamber to flow into the second chamber is solely derived from the negative pressure of the second chamber. If the liquid inlet is partially blocked or too small, the rate of movement of the dirty liquid from the first chamber to the second chamber is more likely to decrease, thereby more likely causing a large amount of dirty liquid to accumulate in the first chamber. Even if the power of the suction device is reduced, excessive accumulation of dirty liquid, coupled with the user pushing and pulling the body back and forth, causes the dirty liquid in the dirty liquid bucket to shake or even splash. This inevitably risks the dirty liquid in the first chamber entering the suction device inside the body, thereby reducing the service life of the suction device. Utility Model Content

[0005] The present application provides a surface cleaning machine with good dirt suction stability, so as to solve the technical problem that in traditional surface cleaning machines, when the body is tilted at too large an angle or is in a flat state, dirty liquid is easily accumulated in the first chamber, thereby easily contaminating the suction device.

[0006] The technical solutions adopted in this application are:

[0007] The suction nozzle extends into the suction nozzle, and the suction nozzle extends into the suction nozzle, and the suction nozzle extends into the suction nozzle. The suction nozzle extends into the suction nozzle and the suction nozzle extends into the suction nozzle. The suction nozzle extends into the suction nozzle.

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

[0009] The second air suction port of the second suction channel is located at the upper part of the second cavity, and the liquid inlet is opened on the cavity wall of the second cavity close to the liquid storage sub-cavity.

[0010] The liquid inlet is arranged below the middle of the second cavity; or, the liquid inlet is arranged at the lower part of the second cavity, and a liquid inlet channel is provided in the second cavity, one end of the liquid inlet channel is sealed and connected to the liquid inlet, and the other end extends to the upper part of the second cavity.

[0011] The sewage liquid barrel further includes a first sealing plate and a second sealing plate. The first sealing plate and the second sealing plate respectively cooperate with the barrel wall of the sewage liquid barrel to separate the inner cavity of the sewage liquid barrel into the first cavity and the second cavity.

[0012] The inner cavity of the sewage liquid barrel is flat and wide in the left and right directions and narrow in the front and back directions. The second sealing plate extends upward from the bottom wall of the barrel body and is sealed with the front side wall and the rear side wall of the barrel body respectively. The first sealing plate is connected to the upper end of the second sealing plate. The first sealing plate is transversely arranged in the barrel body and is sealed with the inner wall of the barrel body and the second sealing plate respectively to form the second cavity. The first sealing plate forms the top wall of the second cavity. The sewage suction pipe is arranged in the middle part of the sewage liquid barrel in the left and right directions, and extends upward from the bottom of the second cavity through the first sealing plate. The upper end of the sewage suction pipe extends into the first cavity; the second air suction port is located on the first sealing plate, or the second air suction port is located at the upper end of the second sealing plate corresponding to the second cavity, and the liquid inlet is arranged on the second sealing plate.

[0013] The second air intake port is located between the sewage suction pipe and the second sealing plate, the second air intake port is located on the first sealing plate, and the second suction channel extends upward from the second air intake port; or, the second air intake port is located between the sewage suction pipe and the second sealing plate, the second air intake port is located on the first sealing plate, the second suction channel is located outside the second cavity, and the second suction channel also includes a bending section, one end of the bending section is connected to the second air intake port, and the other end is connected to the second suction channel; or, the second air intake port is located on the second sealing plate, and its opening is arranged toward the second cavity, the second suction channel extends upward along the second sealing plate, and its lower part covers the second air cover therein; or, the second suction channel is arranged outside the second cavity, the second air intake port is arranged on the second sealing plate, and the second suction channel also includes a transverse section, and the transverse section extends from the second air intake port through the second sealing plate to the outside of the second cavity and is connected to the second suction channel.

[0014] A solid-liquid separation plate is further provided in the first cavity. The solid-liquid separation plate extends in a vertical direction and has two ends connected to the top wall of the second cavity and the barrel cover respectively.

[0015] The dirty liquid bucket further includes a liquid baffle located around the second air suction port and extending into the second cavity.

[0016] The effective flow area of ​​the second suction channel is smaller than that of the first suction channel. The second suction channel at least includes a suction pipe located in the first cavity, and the suction pipe extends upward along the direction of the sewage suction pipe.

[0017] The dirty liquid barrel is arranged on the rear side of the fuselage, the sewage suction pipe and the suction pipe are both arranged on the front side wall of the dirty liquid barrel, the liquid inlet is arranged close to the rear side wall of the barrel body, the fuselage is in a flat state, and the second air intake is located above the liquid inlet and is staggered with the liquid inlet.

[0018] One end of the suction pipe is connected to the second cavity through the second suction port, and the other end extends toward the first cavity and is connected to the first suction device through the first suction channel; alternatively, the surface cleaning machine further includes a second suction device arranged in the first suction channel, and the suction pipe is connected to the second suction device.

[0019] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0020] 1. The surface cleaning machine of the present application includes a dirty liquid barrel, wherein a first chamber and a second chamber are provided in the barrel body of the dirty liquid barrel, which are connected by a liquid inlet. When cleaning, a first suction device extracts gas in the first chamber through a first suction channel, so that a pressure difference is formed between the first chamber and the sewage suction port, and the dirty liquid in the sewage suction port is drawn into the first chamber through the sewage suction pipe by the pressure difference. The dirty liquid in the first chamber can flow into the second chamber through the liquid inlet, so as to reduce the amount of dirty liquid in the first chamber, thereby reducing the amount of dirty liquid in the first chamber that is affected by the shaking of the machine body or other factors and is discharged into the second chamber. The probability of backflow into the suction device is reduced; the second chamber is also provided with a second suction channel, through which the gas in the second chamber is extracted to reduce the air pressure in the second chamber, which helps to speed up the flow of the dirty liquid in the first chamber to the second chamber, reduce the residence time of the dirty liquid in the first chamber, and thus reduce the probability of the dirty liquid in the first chamber being affected by the shaking of the fuselage or other factors and flowing back into the suction device; on this basis, the first chamber is also provided with a liquid storage sub-chamber arranged side by side with the second chamber and a surge sub-chamber located on the top of the second chamber. Due to the liquid storage sub-chamber and the second The chambers are arranged side by side. No matter the sewage liquid barrel is in an upright state or a lying state, the liquid inlet connecting the two is arranged on the side wall between the two, which is the simplest and most reliable solution. Under the action of gravity, dirt is not easy to settle in the liquid inlet and its surrounding area, reducing the chance of the liquid inlet being blocked. Since the first chamber contains a liquid storage sub-chamber at the same liquid level as the second chamber, when the sewage enters the surge sub-chamber through the upper port of the sewage suction pipe, it will flow downward rapidly to the liquid storage sub-chamber under the action of gravity. At the same time, under the pressure difference between the first chamber and the second chamber, the sewage in the liquid storage sub-chamber The liquid quickly enters the second chamber. Even if the suction force of the first suction device is increased, causing a large amount of waste liquid to gush out of the nozzle of the sewage suction pipe instantly, the waste liquid can directly fall into the liquid storage sub-chamber, and no waste liquid will accumulate in the surge sub-chamber. Therefore, even if some waste liquid remains in the liquid storage sub-chamber and the sewage bucket shakes, the waste liquid in the liquid storage chamber is far away from the first suction channel in the bucket cover. Therefore, the waste liquid in the surge sub-chamber will not enter the first suction channel through the first suction port due to the shaking of the machine body or other factors, thereby reducing the impact of the waste liquid on the suction device;In addition, when the body is in a flat state or tilted at a large angle, the liquid inlet is still arranged on the side wall between the liquid storage sub-chamber and the second chamber, and the problem of dirt deposition still does not occur. Therefore, the liquid inlet is not easy to be blocked. When a large amount of dirty liquid suddenly flows into the surge sub-chamber, when the dirty liquid barrel is lying flat, the bottom area of ​​the first chamber is larger than when it is upright, and the liquid level of the dirty liquid is lowered. Since there is a liquid storage sub-chamber located on the side of the second chamber, and the dirty liquid in the liquid storage sub-chamber enters the second chamber through the liquid inlet, even if the gravity of the dirty liquid assists the movement of the dirty liquid in the second chamber into the first chamber, When the force is small, the rate of movement of the waste liquid in the first chamber through the liquid inlet to the second chamber remains unaffected. In this case, the provision of the liquid storage sub-chamber significantly shares the liquid storage pressure of the surge sub-chamber, reducing the accumulation of waste liquid in the surge sub-chamber. Not only is the amount of waste liquid sloshing reduced, but the liquid storage sub-chamber is located at the end of the first chamber farther from the first suction channel. When the waste liquid in the first chamber sloshes or splashes, the height of the splashed waste liquid remains far from the first suction channel, significantly reducing the risk of waste liquid flowing through the first suction channel into the suction device within the fuselage.

[0021] 2. As a preferred embodiment of the present application, since the liquid storage sub-chamber and the second chamber are arranged side by side, the second air intake of the second suction channel is located at the upper portion of the second chamber. Whether the waste liquid barrel is upright or lying flat, the second air intake never lies below the liquid surface. Thus, water does not enter the second suction channel. Positioning the liquid inlet on the side of the second chamber near the liquid storage sub-chamber simplifies the structure, prevents waste liquid or contaminants from accumulating near the inlet, and reduces the chance of inlet blockage. Whether the device is upright, tilted at a large angle, or lying flat, waste liquid in the first chamber can flow from the liquid storage sub-chamber into the second chamber through the inlet due to the pressure differential between the first and second chambers. The waste liquid converges at the liquid storage sub-chamber, particularly at the corresponding inlet. This prevents large amounts of waste liquid from accumulating in the surge sub-chamber due to inlet blockage or a sudden increase in suction force. Waste liquid in the surge sub-chamber does not remain there for a long time, but instead flows rapidly to the liquid storage sub-chamber, thereby reducing the chance of waste liquid backflowing into the suction device through the first suction channel.

[0022] 3. As a preferred embodiment of the present application, the inner cavity of the dirty liquid barrel is divided into a first cavity and a second cavity by arranging a first sealing plate and a second sealing plate, thereby reducing the difficulty of molding the first cavity and the second cavity, and the relative size of the first cavity and the second cavity can be adjusted by adjusting the size and relative position of the first sealing plate and the second sealing plate; moreover, the arrangement of the first sealing plate and the second sealing plate makes the sealing between the first cavity and the second cavity better, preventing liquid seepage and leakage between the first cavity and the second cavity. At the same time, after the dirty liquid is pumped into the second cavity, less dirty liquid remains in the first cavity. Even in a flat state, the liquid level of the dirty liquid is low. Even if shaking occurs, only the dirty liquid in the first cavity will shake or splash, thereby greatly reducing the probability of the dirty liquid entering the first suction device.

[0023] 4. As a preferred embodiment of the present application, the inner cavity of the sewage bucket is configured to be flat, wide in the left-right direction and narrow in the front-to-back direction, which can reduce the space occupied by the sewage bucket in the front-to-back direction of the fuselage, contribute to the lightweight and thinning of the fuselage. When cleaning height-restricted areas such as under the bed and under the table, the fuselage can pass through such areas better, reducing the probability of inconvenience in cleaning height-restricted areas due to the excessive thickness of the fuselage; and the sewage suction pipe is configured to extend upward from the bottom of the second cavity and pass through the first sealing plate, so that the sewage suction pipe and the first sealing plate at least partially overlap in the front-to-back direction of the fuselage, reducing the space occupied by the sewage suction pipe in the front-to-back direction of the sewage bucket, further improving the flatness of the sewage bucket, and contributing to the lightweight and thinning of the fuselage.

[0024] 5. As a preferred embodiment of the present application, a solid-liquid separation plate is provided in the first chamber, which can separate the sewage liquid sucked into the first chamber by the sewage suction pipe, separate the solid waste in the sewage liquid, and allow the liquid in the sewage liquid to pass through and enter the second chamber; such a configuration achieves solid-liquid separation of the sewage liquid, and stores the solid waste and liquid waste in the first chamber and the second chamber respectively, so that the first chamber and the second chamber can be cleaned separately after the cleaning work is completed. For example, the sewage liquid in the second chamber can be poured into a sewer or toilet for treatment, and the solid waste in the first chamber can be poured into a trash can, so that the two can be treated separately, avoiding the difficulty of cleaning caused by the mixing of solid and liquid waste in the sewage liquid. In addition, the two ends of the solid-liquid separation plate are respectively connected to the top wall of the second chamber and the lid of the barrel, achieving full coverage of the sewage liquid in the first chamber and improving the separation efficiency of the solid-liquid separation plate for the sewage liquid.

[0025] 6. As a preferred embodiment of the present application, a liquid baffle extending toward the second cavity is provided around the second air intake port. When the body of the machine shakes, the dirty liquid in the second cavity will shake accordingly, and therefore there is a risk of moving toward the second air intake port and entering the second suction channel through the second air intake port. By providing the liquid baffle, this part of the dirty liquid can be effectively stopped, reducing the probability of the dirty liquid entering the second air intake port, and improving the working stability of the surface cleaning machine.

[0026] 7. As a preferred embodiment of the present application, the effective flow area of ​​the second suction channel is smaller than that of the first suction channel. Under the condition of the same suction force, the gas flow rate in the second suction channel is faster and the gas pressure in the second suction channel is lower, so that the second suction channel has a stronger suction force to achieve faster extraction of air in the second cavity; in this way, the gas in the second cavity will be extracted at a faster speed than that in the first cavity, thereby achieving a pressure difference between the second cavity and the first cavity, so that the dirty liquid in the first cavity can flow quickly into the second cavity under the action of the pressure difference. On this basis, the second suction channel at least includes a suction pipe facing the first suction channel. In this way, when the second chamber is sucked through the second suction channel, the gas will not deviate from the direction of movement during the movement in the suction pipe. Therefore, it can move quickly in the suction pipe under the action of the suction force, thereby improving the suction speed of the gas in the second chamber, thereby achieving rapid pressure reduction in the second chamber, and then increasing the flow rate of the dirty liquid in the first chamber to the second chamber, shortening the retention amount and retention time of the dirty liquid in the first chamber, reducing the risk of the dirty liquid in the first chamber backflowing into the first suction device, and providing guarantee for the stable operation of the surface cleaning machine.

[0027] 8. As a preferred embodiment of the present application, in order to facilitate the user to observe the liquid level in the dirty liquid bucket, the dirty liquid bucket is usually configured to be made of transparent material in at least a part of its area, and the dirty liquid bucket is arranged on the rear side of the machine. When the user holds the surface cleaning machine for cleaning, the dirty liquid bucket faces the user, which helps the user to observe the liquid level in the dirty liquid bucket during the cleaning process. The sewage suction pipe is arranged on the front side wall of the dirty liquid bucket. On the one hand, the vertical distance between the sewage suction pipe and the sewage suction port is shortened to a certain extent, which helps to increase the suction speed of the sewage suction pipe for the sewage at the sewage suction port. On the other hand, the sewage suction pipe is located on the side of the sewage bucket away from the user, that is, the sewage suction pipe Hidden inside the dirty liquid barrel, the sewage suction pipe is implicitly arranged, which prevents the sewage in the sewage suction pipe from being directly exposed to the user's field of vision, and helps to optimize the user's sensory experience; in addition, the dirty liquid entering the second cavity through the liquid inlet will flow downward under the action of its own weight, and the second air intake port is set to be located above the liquid inlet when the fuselage is in a flat state, which can prevent the dirty liquid flowing out of the liquid inlet from interfering with the second air intake port, and the staggered arrangement of the second air intake port and the liquid inlet weakens the suction effect of the airflow moving through the second air intake port into the second suction channel on the dirty liquid flowing out of the liquid inlet, thereby reducing the probability of the dirty liquid being sucked into the second suction channel by the second air intake port. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0029] Figure 1 A schematic diagram of the surface cleaning machine in a tilted working state and a flat working state;

[0030] Figure 2 This is a schematic diagram of the sewage bucket structure in Example 1;

[0031] Figure 3 for Figure 2 Exploded view of the sewage barrel;

[0032] Figure 4 for Figure 2 Cross-sectional view of the sewage bucket in the AA direction;

[0033] Figure 5 This is a schematic structural diagram of the barrel cover in Example 1;

[0034] Figure 6(A) shows Figure 2 Cross-sectional view of the middle sewage bucket along direction BB;

[0035] Figure 6(B) Figure 2 Cross-sectional view of the middle sewage bucket along the CC direction;

[0036] Figure 7 This is a schematic structural diagram of the barrel in Example 1;

[0037] Figure 8 This is a cross-sectional view of the sewage bucket in Example 2 when it is in a flat position;

[0038] Figure 9 for Figure 8 A cross-sectional view of the sewage bucket along the DD direction;

[0039] Figure 10 This is a schematic structural diagram of the barrel in Example 2;

[0040] Figure 11 A cross-sectional view along the left-right direction of the sewage bucket in Example 3;

[0041] Figure 12 A cross-sectional view along the left-right direction of the sewage bucket in the fourth embodiment;

[0042] Figure 13 This is a schematic diagram of the barrel cover in Example 4;

[0043] Figure 14 This is an exploded view of the sewage bucket in Example 5;

[0044] Figure 15 A schematic diagram of a first structure of the first suction channel and the second suction channel and airflow thereof;

[0045] Figure 16 A schematic diagram of a second structure of the first suction channel and the second suction channel and air flow thereof;

[0046] Figure 17 Schematic diagram of the third structure of the first suction channel and the second suction channel and their airflow;

[0047] Figure 18 Schematic diagram of the fourth structure of the first suction channel and the second suction channel and their airflow.

[0048] in:

[0049] 1 Body; 2 Floor brush; 21 Cleaning roller; 3 Dirt liquid bucket; 31 Bucket cover; 311 Upper shell; 312 Lower shell; 313 Ventilation chamber; 3131 Gas-liquid separation device; 314 Concave cavity; 315 Accommodation chamber; 32 First suction channel; 321 First suction port; 33 Barrel; 331 First cavity; 3311 Liquid storage sub-cavity; 3312 Surge sub-cavity; 332 Second cavity; 34 Sewage suction pipe; 341 Pipe port; 35 Second suction channel; 351 second air intake port; 352 bending section; 353 transverse section; 354 ​​suction pipe; 36 first sealing plate; 361 avoidance port; 37 second sealing plate; 371 first section; 372 second section; 38 liquid inlet; 39 solid-liquid separation plate; 391 liquid hole; 30 baffle; 301 side panel; 302 top panel; 303 rear wall panel; 5 liquid level electrode; 6 sealing element; 7 first suction device; 8 liquid baffle; 9 second suction device. DETAILED DESCRIPTION

[0050] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0051] The following description sets forth many specific details to facilitate a thorough understanding of the present application. However, the present application may also be implemented in other ways than those described herein, and 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 of each embodiment may be combined with each other unless there is a conflict.

[0052] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present application.

[0053] In this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0054] In the present application, unless otherwise clearly specified and limited, a first feature being “on” or “under” a second feature may mean that the first and second features are in direct contact with each other, or the first and second features are in indirect contact with each other through an intermediate medium.

[0055] In the present application, solid hollow arrows and lines represent the direction of liquid flow movement, and dashed hollow arrows and lines represent the direction of air flow movement.

[0056] Example 1:

[0057] Surface cleaning machines include handheld cleaning machines such as floor scrubbers and vacuum cleaners, and self-propelled cleaning machines such as sweeping and mopping robots and mopping robots. This embodiment uses a floor scrubber as an example to illustrate this solution. Those skilled in the art will appreciate that this solution can also be applied to any of the aforementioned cleaning devices.

[0058] As the surface cleaning machine of the utility model, Figures 1 to 7 As shown, it includes a water supply system, a sewage suction system, a pivotally connected body 1 and a floor brush 2. In this embodiment, the body 1 has three working states: an upright parking state, a tilted working state, and a lying working state. Figure 1 The figure shows that the machine body is in a tilted working state and a flat working state respectively, and the dirty liquid bucket also has two states following the machine body, a tilted state and a flat state. The floor brush 2 is provided with a sewage suction port and a cleaning roller 21. A scraper and a water supply port connected to the water supply system are provided above the sewage suction port. The sewage suction system includes a first suction device, a dirty liquid bucket 3, and a sewage suction pipe connecting the sewage suction port and the dirty liquid bucket 3. The sewage suction port is provided behind the cleaning roller 21. The machine body 1 is provided with a first suction device 7 and a battery pack. The sewage bucket is provided on the machine body 1. The sewage bucket is provided with a sewage suction pipe 34. In the first embodiment, the sewage suction pipe 34 is provided in the sewage bucket. In this embodiment, the first suction device 7 is a vacuum motor. The cleaning roller 21 includes a roller and a cleaning cloth sleeved outside the roller. The cleaning cloth is provided with a tuft of hair. The dirty liquid bucket 3 is divided into a first chamber 331 and a second chamber 332. Figure 2 and Figure 3As shown, the sewage bucket includes a barrel body 33 and a barrel cover 31. The barrel cover 31 is provided with a ventilation cavity 313. The barrel cover 31 includes an upper shell 311 and a lower shell 312. The upper shell 311 covers the lower shell 312 to form the ventilation cavity 313. A gas-liquid separation device is provided in the ventilation cavity 313. The gas-liquid separation device can preferably be selected from Hepa; the lower shell 312 is provided with an air outlet channel opening toward the first cavity 331. The air outlet channel connects the ventilation cavity 313 and the first cavity 331. The air outlet channel There are two of them and they are symmetrically arranged along the left and right directions of the machine body 1. The air outlet channel constitutes the first suction channel 32. A through hole is provided at the bottom of the dirty liquid barrel 3. The lower end of the through hole is connected to the sewage suction pipe. The upper end of the through hole extends upward to form a sewage suction pipe 34. The pipe mouth of the sewage suction pipe 34 extends into the first cavity 331. A baffle 30 is provided between the air outlet channel and the pipe mouth to isolate the two. When the surface cleaning machine is working, the water supply system supplies water through the water supply port to soak the cleaning cloth on the cleaning roller 21. The cleaning roller 21 rotates. The cleaning cloth and its tufts continuously wipe the surface to be cleaned, and the scraping element scrapes the dirty liquid on the cleaning cloth and its tufts. The first suction device 7 operates to draw away the airflow in the first chamber 331 and the second chamber 332 through the first suction channel 32 and the second suction channel 35, respectively, so that a negative pressure is formed in the dirty liquid bucket 3. The dirty liquid enters the dirty liquid suction pipe 34 through the suction port and the suction pipe, and is ejected from the nozzle of the suction pipe 34 and falls into the first chamber 331. At the same time, the gas in the second chamber 332 is sucked through the second suction channel 6. There is a pressure difference between the second chamber 332 and the first chamber 331. The negative pressure in the second chamber is greater than the negative pressure in the first chamber. As a result, the dirty liquid in the first chamber 331 is drawn into the second chamber 332 through the liquid inlet 38 under the action of the pressure difference. The dirty liquid bucket is also provided with a liquid level electrode 5 for detecting whether the dirty liquid is full. When the dirty liquid in the first chamber and / or the second chamber is full, the surface cleaning machine alarms, prompting the user to empty the dirty liquid in the dirty liquid bucket.

[0059] In this embodiment, the first suction device 7 is arranged in the body 1, the waste liquid barrel 3 is arranged at the rear side of the body 1, the sewage suction pipe 34 is arranged in the waste liquid barrel 3, and the waste liquid barrel 3 includes a barrel cover 31 and a barrel body 33. Figures 4 to 7As shown, the upper end of the sewage suction pipe 34 extends into the barrel body 33, and the barrel cover 31 is provided with a first suction channel 32 for connecting the barrel body 33 and the first suction device 7. The barrel body 33 includes a first cavity 331 and a second cavity 332 located on one side of the lower part of the barrel body 33. The first cavity 331 includes a liquid storage sub-cavity 3311 arranged side by side with the second cavity 332 and a surge sub-cavity 3312 located above the liquid storage sub-cavity 3311 and the second cavity 332. The first cavity 331 and the second cavity 332 are connected through the liquid inlet 38 so that the sewage in the first cavity 331 flows into the second cavity 332 through the liquid inlet 38. The first air suction port 321 of the first suction channel 32 and the upper end of the sewage suction pipe 34 are both arranged in the surge sub-cavity 3312; it also includes a second suction channel 35 at least partially located in the first cavity 331, and the second air suction port 351 of the second suction channel 35 is located at the upper part of the second cavity 332.

[0060] Figure 4 The figure shows the flow path of the sewage liquid in the sewage barrel 3. The line with the hollow arrow represents the flow path of the sewage liquid. After the sewage liquid enters the surge sub-chamber from the sewage suction pipe, it enters the second chamber 332 through the surge sub-chamber 3312, the liquid storage sub-chamber 3311 and then the liquid inlet 38.

[0061] The barrel body 33 of the sewage barrel 3 of the present application is provided with a first chamber 331 and a second chamber 332 which are interconnected. When cleaning, the first suction device extracts the gas in the first chamber 331 through the first suction channel 32, so that a pressure difference is formed between the first chamber 331 and the sewage suction port, and the sewage from the sewage suction port is sucked into the first chamber 331 through the pressure difference. The sewage in the first chamber 331 can flow into the second chamber 332 through the liquid inlet 38, so as to reduce the amount of sewage in the first chamber 331, thereby reducing the sewage in the first chamber 331 from being affected by the body 1. The probability of the dirty liquid in the first chamber 331 flowing back into the suction device due to shaking or other factors is reduced; the second chamber 332 is also provided with a second suction channel 35, through which the gas in the second chamber 332 is extracted to reduce the air pressure in the second chamber 332, thereby helping to speed up the flow of the dirty liquid in the first chamber 331 into the second chamber 332 and reduce the residence time of the dirty liquid in the first chamber 331, thereby reducing the probability of the dirty liquid in the first chamber 331 flowing back into the suction device due to shaking of the fuselage 1 or other factors; on this basis, the first The cavity 331 is further provided with a liquid storage sub-cavity 3311 arranged side by side with the second cavity 332 and a surge sub-cavity 3312 located on the top of the second cavity 332. When the dirty liquid enters the surge sub-cavity 3312 through the upper port of the sewage suction pipe 34, it will slide downward under the action of gravity and quickly spread to the liquid storage sub-cavity 3311, reducing the dirty liquid content in the surge sub-cavity 3312. At the same time, the height of the dirty liquid in the surge sub-cavity 3312 is relatively low, and the dirty liquid in the surge sub-cavity 3312 is not easy to enter the second cavity 332 through the first suction port 321 due to the shaking of the fuselage 1 or other factors. A suction channel 32 is formed, thereby reducing the impact of the dirty liquid on the first suction device. In addition, especially when the fuselage 1 is in a flat state or tilted at a large angle, the gravity of the dirty liquid has a smaller auxiliary effect on the movement of the dirty liquid in the second chamber 332 into the first chamber 331. The movement rate of the dirty liquid in the first chamber 331 to the second chamber 332 is relatively slow. At this time, the provision of the liquid storage sub-chamber 3311 greatly shares the liquid storage pressure of the surge sub-chamber 3312, reduces the accumulation of dirty liquid in the surge sub-chamber 3312, and helps to reduce the risk of dirty liquid backflowing into the first suction device.

[0062] The second air inlet 351 of the second suction channel 35 is located above the second cavity 332. This means that regardless of whether the body 1 is in an upright position, tilted, or lying flat, the second air inlet 351 remains above the second cavity 332. This ensures that the level of the waste liquid in the second cavity 332 remains below the second air inlet 351 regardless of the body 1's position. This reduces the probability of waste liquid in the second cavity 332 entering the second suction channel 35 through the second air inlet 351.

[0063] In this embodiment, a liquid level warning line is provided on the waste liquid barrel. When the waste liquid barrel is upright, the liquid level warning line is at or below the barrel's midline in the height direction. The detection point of the liquid level electrode is located near the liquid level warning line. When the main body 1 is in a flat position, the sensing point of the liquid level electrode is located at or below the midline of the waste liquid barrel. In this way, the second air intake 351 remains above the highest liquid level of the waste liquid when the main body 1 is in a flat position, effectively reducing the probability of waste liquid backflowing into the second air intake 351.

[0064] It should be pointed out that the fuselage 1 in the first embodiment is in a lying state, which does not mean that the fuselage 1 is completely parallel to the ground. It can also mean that there is still a certain angle between the fuselage 1 and the ground. In the first embodiment, when the angle α between the fuselage 1 and the ground satisfies α≤25°, the fuselage 1 can be considered to be in a lying state.

[0065] In this embodiment, the liquid storage sub-cavity 3311 is a narrow cavity whose volume is much smaller than that of the second cavity. The liquid inlet 38 is opened on the cavity wall of the second cavity 332 close to the liquid storage sub-cavity 3311 and is connected to the liquid storage sub-cavity 3311. Figure 3 、 Figure 5 As shown, regardless of whether the waste liquid barrel is upright or lying flat, the liquid inlet is not disposed at the top of the second chamber, but at the side. According to the principle of universal gravitation, dirt is less likely to accumulate near the liquid inlet, thereby reducing the probability of the liquid inlet being blocked. Therefore, when the body 1 is tilted at a large angle or is in a lying position, the waste liquid in the first chamber 331 flows into the liquid storage sub-chamber 3311 and enters the second chamber 332 through the liquid inlet 38, where it is locked in the second chamber. This significantly reduces the waste liquid in the first chamber, avoids the probability of a large amount of waste liquid instantly accumulating in the surge sub-chamber 3312, further reduces the waste liquid content in the first chamber, and reduces the probability of waste liquid backflowing into the suction device through the first suction channel 32.

[0066] The waste liquid barrel further includes a first sealing plate 36 and a second sealing plate 37. Figures 4 to 7As shown, the first and second sealing plates 36, 37 respectively cooperate with the wall of the waste liquid barrel 3 to separate the interior of the waste liquid barrel 3 into a first chamber 331 and a second chamber 332. By providing the first and second sealing plates 36, 37 to separate the interior of the waste liquid barrel 3 into the first and second chambers 331, 332, the difficulty of molding the first and second chambers 331, 332 is reduced. The relative sizes of the first and second chambers 331, 332 can be adjusted by adjusting the size and relative position of the first and second sealing plates 36, 37. Furthermore, the provision of the first and second sealing plates 36, 37 enhances the seal between the first and second chambers 331, 332, preventing leakage between the first and second chambers 331, 332. Seals 6 are provided on the outer periphery of each of the first and second sealing plates 36, 37. These seals are made of an elastic material such as rubber and have an interference fit with the wall of the waste liquid barrel 3.

[0067] In this embodiment, Figure 2 and Figure 3 As shown, the inner cavity of the dirty liquid bucket 3 is flat and wide in the left-right direction and narrow in the front-back direction, which can reduce the space occupied by the dirty liquid bucket in the front-back direction of the fuselage 1, and help to make the fuselage 1 lighter and thinner. When cleaning areas with restricted height such as under the bed and under the table, the fuselage 1 can pass through such areas better, reducing the probability of inconvenience in cleaning the height-restricted areas due to the excessive thickness of the fuselage 1; the second sealing plate 37 extends upward from the bottom wall of the barrel body 33 and is sealed with the front side wall and the rear side wall of the barrel body 33 respectively, as shown in FIG. Figure 4 As shown in Figure 6, the first sealing plate 36 is fixed to the barrel cover 31, and the second sealing plate 37 is vertically fixed to the barrel body and is integrally formed with the barrel body. When the barrel cover is buckled on the barrel body, the upper ends of the first sealing plate 36 and the second sealing plate 37 are sealed and connected. The first sealing plate 36 is horizontally arranged in the barrel body 33 and is respectively sealed and connected to the inner wall of the barrel body 33 and the second sealing plate 37 to form a second cavity 332. The first sealing plate 36 forms the top wall of the second cavity 332. The sewage suction pipe 34 is arranged in the middle of the left and right directions of the sewage barrel 3 It is positioned closely against the front sidewall of the barrel 33, ensuring that when the waste liquid barrel is tilted backward with the machine body to lie flat, the suction pipe 34 is located at the highest point of the barrel, preventing waste liquid from flowing back through the suction pipe. The first sealing plate 36 also has a clearance opening 361 for the suction pipe 34, which extends upward from the bottom of the second cavity 332. This first sealing plate 36 reduces the space occupied by the suction pipe 34 in the front-to-back direction of the waste liquid barrel 3, further enhancing the flattening of the waste liquid barrel 3 and contributing to the slimming and lightness of the machine body 1. The upper end of the suction pipe 34 extends into the first cavity 331; the second air intake 351 is located on the first sealing plate 36.

[0068] Of course, it is better to fix the second sealing plate 37 vertically on one side of the first sealing plate 36, or to form the second sealing plate 37 and the first sealing plate 36 as one piece. When the barrel cover is buckled on the barrel body, the first sealing plate 36 and the second sealing plate 37 are respectively sealed against the inner wall of the barrel body, which not only facilitates the pouring out of the dirt in the sewage barrel, but also facilitates the cleaning of the barrel body of the sewage barrel, the first sealing plate 36, the second sealing plate 37, the barrel cover and the liquid level electrode thereon.

[0069] In this embodiment, Figures 4 to 7 As shown, the second suction channel 35 is provided on the barrel cover 31, and the outer side of the second sealing plate 37 of the barrel body and the barrel body 33 form a liquid storage sub-chamber 3311 located on one side of the second chamber 332. The second suction channel includes a vertically arranged suction pipe 354, and the second air intake port 351 is located between the sewage suction pipe 34 and the second sealing plate 37. The second air intake port 351 is located on the first sealing plate 36, and the suction pipe 354 extends upward from the second air intake port 351 into the first suction channel 32. With such a setting, the extension length of the suction pipe 354 is greatly shortened, thereby improving the smoothness of the movement of the gas in the first suction channel 32, helping to increase the pressure reduction speed of the second chamber 332, and thereby accelerating the movement speed of the gas in the first chamber 331 to the second chamber 332. A liquid baffle 8 extending into the second chamber 332 is provided around the second air intake port 351, as shown Figure 4As shown in Figure 6, the liquid baffle plate 8 and the cavity wall of the second cavity 332, that is, the first sealing plate 36, cooperate to form a liquid baffle space. The second air intake port 351 is located in the liquid baffle space, and the liquid inlet 38 is located outside the liquid baffle space. When the body 1 shakes, the dirty liquid in the second cavity 332 will shake accordingly, and thus move toward the second air intake port 351. By setting the liquid baffle plate 8, this part of the dirty liquid can be effectively stopped, reducing the probability of the dirty liquid entering the second air intake port 351, and improving the working stability of the surface cleaning machine. In this embodiment, the effective flow area of ​​the second suction channel 35 is smaller than that of the first suction channel 32. Under the condition of the same suction force, the gas flow rate in the second suction channel 35 is faster and the gas pressure in the second suction channel 35 is lower, so that the second suction channel 35 has a stronger suction force, thereby achieving faster extraction of air in the second chamber 332; in this way, the gas in the second chamber 332 will be extracted at a faster speed than that in the first chamber 331, achieving a pressure difference between the second chamber 332 and the first chamber 331, so that the dirty liquid in the first chamber 331 can flow quickly into the second chamber 332 under the action of the pressure difference. The second suction channel 35 at least includes a suction pipe 354 located in the first chamber 331. The suction pipe 354 extends upward along the direction of the sewage suction pipe 34. When the second chamber 332 is sucked through the second suction channel 35, the path of the gas moving in the suction pipe 354 is the shortest. Therefore, under the action of the suction force, the gas can move quickly in the suction pipe 354, thereby increasing the suction speed of the gas in the second chamber 332, thereby achieving rapid pressure reduction in the second chamber 332, and further increasing the flow rate of the dirty liquid in the first chamber 331 to the second chamber 332, shortening the retention amount and retention time of the dirty liquid in the first chamber 331, and reducing the risk of the dirty liquid in the first chamber 331 flowing back into the first suction device, thereby ensuring the stable operation of the surface cleaning machine.

[0070] To facilitate the user to observe the liquid level in the dirty liquid barrel 3, the dirty liquid barrel 3 is usually configured to be made of transparent material in at least part of its area, and the dirty liquid barrel 3 is arranged on the rear side of the machine body 1. When the user holds the surface cleaning machine for cleaning, the dirty liquid barrel 3 faces the user, which helps the user to observe the liquid level in the dirty liquid barrel 3 during the cleaning process. The sewage suction pipe 34 is arranged on the front side wall of the dirty liquid barrel 3. On the one hand, the vertical distance between the sewage suction pipe 34 and the sewage suction port is shortened to a certain extent, which helps to increase the suction speed of the sewage suction pipe 34 for the sewage at the sewage suction port. On the other hand, the sewage suction pipe 34 is located on the side of the sewage barrel 3 facing away from the user, that is, the sewage suction pipe 34 is hidden inside the sewage barrel 3, realizing the implicit layout of the sewage suction pipe 34, avoiding the dirt in the sewage suction pipe 34 from being directly exposed to the user's field of vision, and helping to optimize the user's sensory experience.

[0071] In this embodiment, when the body 1 is in a flat position, the second air intake 351 is located above the liquid inlet 38 and is staggered with the liquid inlet 38, as shown in FIG6(B). Dirt liquid entering the second chamber 332 through the liquid inlet 38 will flow downward under its own weight. Positioning the second air intake 351 above the liquid inlet 38 when the body 1 is in a flat position prevents the dirty liquid flowing out of the liquid inlet 38 from interfering with the second air intake 351. Furthermore, the staggered arrangement of the second air intake 351 and the liquid inlet 38 weakens the effect of the airflow flowing through the second air intake 351 into the second suction channel 35 on the dirty liquid flowing out of the liquid inlet 38, thereby reducing the probability of dirty liquid being drawn into the second suction channel 35 by the second air intake 351.

[0072] In this embodiment, the second suction channel includes a suction pipe 354, one end of which is connected to the second cavity 332 through the second suction port 351, and the other end extends toward the first cavity 331 and extends into the first suction channel 32, so that the first suction device not only has the function of sucking the gas in the first cavity 331 through the first suction channel 32, but also further integrates the function of extracting the gas in the second cavity 332 through the second suction channel 35. The functions are further integrated, thereby optimizing the structural design of the surface cleaning machine.

[0073] In this embodiment, the liquid inlet 38 is arranged below the middle of the second chamber 332; more preferably, the liquid inlet is arranged at the lower part of the second chamber, and a liquid inlet channel is provided in the second chamber, one end of the liquid inlet channel is sealed and connected to the liquid inlet, and the other end extends to the upper part of the second chamber, that is, the liquid inlet is arranged at the bottom end of the second sealing plate, and the liquid inlet channel is arranged upwardly close to the second sealing plate, so that the lower end of the liquid inlet channel is sealed and connected to the liquid inlet, and the liquid inlet channel extends upward along the second sealing plate so that its upper end is at least not lower than the liquid level warning line in the middle of the sewage bucket. Such a structure makes the liquid inlet smoother and the dirty liquid will not flow back, so that the dirty liquid can be better locked in the second chamber, so that the amount of dirty liquid remaining in the liquid storage sub-chamber, that is, the first chamber, is less, and the distance between the dirty liquid and the first suction channel is further increased. The splashing height is fixed, which greatly reduces the probability of dirty liquid contaminating the vacuum motor. Such solutions that do not deviate from the inventive concept of this application are all within the scope of protection of this application and are not given examples one by one here.

[0074] Of course, it is understandable that the second suction channel 35 can also be arranged outside the second cavity 332, such as Figure 15As shown, the second air intake port 351 is provided on the second sealing plate 37, and the second suction channel 35 further includes a transverse section 353. The transverse section 353 extends from the second air intake port 351 through the second sealing plate 37 to the outside of the second cavity 332 and is connected to the second suction channel 35. The second air intake port 351 is located above the liquid inlet and is staggered with the liquid inlet. This solution allows the dirty liquid to enter the second cavity from the liquid inlet and move forward and downward into the second cavity. The movement trajectory of the dirty liquid is far away from the second air intake port, and it is difficult for the dirty liquid to enter the second suction channel 35. Of course, a one-way valve can be provided at the liquid inlet 38. The one-way valve allows the dirty liquid to flow in one direction from the first cavity 331 to the second cavity 332. In this way, the dirty liquid is locked in the second cavity, so that the amount of dirty liquid that can sway is greatly reduced, and the possibility of dirty liquid contaminating the fan is greatly reduced. Such solutions that do not deviate from the inventive concept of this application are all within the scope of protection of this application and will not be given examples one by one here.

[0075] Of course, it is understandable that the first suction channel and the second suction port can also be staggered. Since the second suction channel extends into one of the first suction channels, that is, the second suction port and the upper end of the second suction channel are staggered. Figure 18 As shown, since the sewage inlet pipe 34 is located in the center of the sewage bucket, the possibility of the two first suction channels being directly opposite the sewage inlet pipe 34 is avoided, reducing the probability of sewage entering the first suction channel. The second suction port 351 is located on the first sealing plate 36, that is, the through hole in the first sealing plate 36 forms the second suction port 351, and the lower end of the second suction channel and the second suction port 351 are then sealedly connected via an arc-shaped bend 352. An inclined liquid baffle 8 can also be provided below and around the through hole in the first sealing plate 36. The provision of the bend 352 provides more options for the placement of the suction pipe 354. The suction pipe 354 does not need to be located directly opposite the second suction port 351. The suction pipe 354 can be placed at an appropriate position according to design requirements and then connected to the second suction port 351 via the bend 352. This makes space more compact and easier to design and manufacture.

[0076] Example 2:

[0077] The difference between this embodiment and the first embodiment is that a solid-liquid separation plate is further provided in the first cavity, and the structure of the second suction channel is also different.

[0078] like Figures 8 to 10As shown, the second sealing plate 37 includes a first section 372 and a second section 371 extending upward from the first sealing plate 36 to the barrel cover and perpendicularly connected to the barrel cover. The second section 371 is provided with a liquid passage hole 391. In other words, the solid-liquid separation plate 39 is formed by the second section 371 located above the second chamber 332. That is, the second sealing plate 37 continues to extend upward from the first sealing plate 36 to form the solid-liquid separation plate 39. The solid-liquid separation plate 39 is provided with a liquid passage hole 391. Sewage enters the surge sub-chamber through the upper port of the sewage suction pipe. After passing through the liquid passage hole 391 on the solid-liquid separation plate 39, the solid waste is retained in the surge sub-chamber 3312 of the first chamber 331. The sewage enters the liquid storage sub-chamber 3311 through the liquid passage hole and enters the second chamber through the liquid inlet 38 on the second sealing plate 37. Because the solid-liquid separation plate 39 is formed by an upward extension of the second sealing plate, and the liquid inlet 38 is located on the second sealing plate 37 and below the first sealing plate 36, waste is retained in the surge sub-cavity above the second chamber. Therefore, the liquid inlet 38 is less likely to be clogged by waste. Furthermore, the ends of the solid-liquid separation plate 39 are connected to the top wall of the second chamber 332 and the lid 31, respectively, ensuring full coverage of the waste liquid in the first chamber 331 and improving the separation efficiency of the solid-liquid separation plate 39.

[0079] Specifically, Figure 9 The flow path of the dirty liquid is shown in FIG. 1 , and the hollow arrow and its line indicate the flow path of the dirty liquid. In this embodiment, the second sealing plate 37 is arranged in the barrel body, such as Figure 10 As shown, the solid-liquid separation plate 39 is provided with a plurality of liquid passage holes 391, that is, the second section 371 forms the solid-liquid separation plate 39, and the plurality of liquid passage holes 391 are arranged on the second section 371. The second sealing plate 37 is arranged across the front-to-back direction of the barrel body. Since the sewage barrel is lying along the front-to-back direction of the barrel body, both the liquid passage holes 391 and the liquid inlet 38 are located on the second sealing plate 37 in the first cavity. Since the second sealing plate 37 is always upright in the first cavity, regardless of whether the fuselage 1 is in an upright state, a significantly tilted state or a lying state, the liquid inlet 38 and the liquid passage holes 391 are arranged longitudinally rather than horizontally. Therefore, solid impurities in the sewage generally do not adhere to the wall, and the liquid passage holes on the solid-liquid separation plate 39 are not easily blocked, which effectively ensures that the filtrate of the solid-liquid separation plate 39 is unobstructed and prevents a large amount of sewage in the first cavity 331 caused by the blockage of the solid-liquid separation plate 39.

[0080] The second suction channel 35 includes a suction pipe 354 extending upward and a bent section 352. One end of the bent section 352 is connected to the suction pipe 354, and the other end passes through the through hole on the first sealing plate 36 and extends into the second cavity 332. The pipe opening at the other end of the bent section forms a second suction port 351. Figure 8As shown, when the waste liquid bucket is in a flat position, the second suction port 351 is located above half of the front-to-back thickness of the waste liquid bucket. This ensures that even if the waste liquid is full (generally, the liquid level warning line is located at half the height of the bucket body, so that the waste liquid bucket is full when the liquid level reaches half of its capacity), the second suction port is raised by the bent section, and waste liquid will not enter the second suction port 351, greatly reducing the probability of waste liquid entering the machine body through the second suction port and contaminating the vacuum blower.

[0081] Of course, in order to make it easier for the dirty liquid to enter the liquid storage sub-cavity, we can also set the first sealing plate 36 to be inclined toward the liquid storage sub-cavity; or set a guide surface on the top wall of the first cavity to guide the dirty liquid into the liquid storage sub-cavity.

[0082] The remaining structures of this embodiment and the beneficial effects produced by the structures are consistent with those of the first embodiment and will not be described in detail here.

[0083] Example 3:

[0084] The difference between this embodiment and the second embodiment is that the solid-liquid separation plate is provided separately.

[0085] like Figure 11 As shown, a separate solid-liquid separation plate 39 is provided above the second cavity. The solid-liquid separation plate 39 is provided above the second cavity along the left and right directions of the waste liquid barrel. The left and right ends of the solid-liquid separation plate are bent toward the sewage inlet pipe to enclose the sewage inlet pipe therein, thereby isolating the sewage inlet pipe from the first suction channel, and extending vertically to the upper and lower ends respectively connected to the top wall of the second cavity 332 and the barrel cover 31; the solid-liquid separation plate 39 plays a role in filtering solid waste on the one hand, and plays a role in preventing surges on the other hand, especially when the waste liquid barrel lies flat on the surface to be cleaned, the surface tension of the liquid hole plays a certain blocking and buffering role for the upward splashing of the waste liquid; under the suction action of the first suction device, Figure 11 The hollow arrows and lines in the figure represent the path of the dirty liquid after passing through the solid-liquid separation plate 39 and continuing to move downward to the liquid inlet 38.

[0086] Example 4:

[0087] The difference between this embodiment and embodiment 3 is that there are two solid-liquid separation plates, such as Figure 12 and Figure 13As shown, in addition to separately providing a solid-liquid separation plate 39 above the second chamber along the left and right directions of the barrel body of the waste liquid barrel as in the third embodiment, the solid-liquid separation plate is also provided with a circular liquid passage hole. The curved section of the solid-liquid separation plate is provided with strip-shaped liquid passage holes, which are staggered. In addition, a circular liquid passage hole is provided on the second section 371 of the second sealing plate 37 to form a second solid-liquid separation plate. This is equivalent to providing a multiple filtering structure in the surge sub-chamber at the upper part of the second chamber. The liquid passage holes have different sizes and shapes, thereby isolating solid waste of different shapes and sizes, which can better separate solid waste from waste liquid, avoid the possibility of solid waste entering the liquid inlet and blocking the liquid inlet, and thus allow waste liquid to smoothly enter the liquid storage sub-chamber. At the same time, the liquid passage holes of different shapes and sizes can form surface tension for liquid clumps of different sizes, thereby better preventing waste liquid from moving upward through the liquid passage holes to the first suction channel, especially reducing the risk of contamination of the vacuum blower by shaking or splashing of waste liquid when the fuselage is in a flat state.

[0088] Embodiment 5:

[0089] As the surface cleaning machine of the utility model, it includes a body (not shown in the figure) and a floor brush (not shown in the figure) hinged to the body, the front end of the floor brush is provided with a sewage suction port (not shown in the figure), a scraping member (not shown in the figure) and a detachable cleaning roller (not shown in the figure), a clean water tank (not shown in the figure) is provided in the floor brush, the front end of the floor brush is provided with a water distribution member connected to the clean water tank, the water distribution member is provided with a water supply port for supplying water to the cleaning roller, a positioning member (not shown in the figure) is provided at the upper end of the body, a dirty liquid bucket is provided below the positioning member, and an air inlet cavity (not shown in the figure) and an air outlet cavity (not shown in the figure) are provided on the positioning member. The air inlet cavity is connected to the ventilation cavity of the dirty liquid barrel, a detachable power source structure (not shown in the figure) is provided above the positioning member, a battery pack (not shown in the figure) and a vacuum motor (not shown in the figure) are provided in the power source structure, and an air inlet connected to the air inlet cavity of the positioning member and an air outlet connected to the interior of the fuselage are provided on the outer shell of the power source structure. The power source structure can be taken out from the positioning member and combined with the dust cup and the dust nozzle to form a vacuum cleaner structure, or it can be combined with a mite removal cleaning head to form a mite removal instrument, and it can also be combined with a fabric cleaning head to form a fabric cleaning machine.

[0090] In this embodiment, the waste liquid barrel 3 includes a barrel cover 31 and a barrel body 33. Figure 14As shown, the barrel cover 31 includes an upper shell 311 and a lower shell 312. The middle part of the upper shell 311 is recessed downward to form a concave cavity 314. A gas-liquid separation device 3131, such as a HEPA, is arranged in the concave cavity 314. The lower shell 312 includes a accommodating cavity 315 with an upward opening. The upper shell 312 is snapped onto the lower shell 311 to cover the accommodating cavity 315, and the concave cavity 314 is sleeved in the accommodating cavity 315 to form a vent cavity 313. A first suction port is provided at the lower part of the front side of the accommodating cavity 315. The vent cavity 313 is the first suction channel. A baffle 30 is provided around the first suction port. The lower end of the baffle 30 extends to below the pipe mouth 341 of the sewage inlet pipe 34 to isolate the vent and the sewage inlet pipe to prevent the sewage sprayed from the sewage inlet pipe from directly entering the accommodating cavity 315 through the vent.

[0091] In this embodiment, the baffle 30 includes a rear wall panel 303 and side panels 301 located on the left and right sides of the rear wall panel 303 and a top panel 302 located on the top of the rear wall panel. The side panels 301 and the top panel 302 are arranged toward the sewage inlet pipe 34. The baffle 30 is provided with a liquid hole 391. Therefore, the baffle 30 forms a solid-liquid separation plate; the second suction channel 35 includes a suction pipe 354 and a transverse section 353, as shown in FIG. Figure 14 As shown, the transverse section is arranged above the baffle 30, and the transverse section 353 extends backward into the first suction channel 32, i.e., the first suction channel. The upper end of the suction pipe 354 passes through the top panel 302 and is connected to the transverse section 353, and the lower end of the suction pipe 354 extends into the second cavity.

[0092] Of course, it is understandable that the first suction channel can also be a ventilation cavity 313, such as Figure 17 As shown, the suction pipe 354 can also pass through the first suction channel 32, that is, through the ventilation cavity 313 and extend upward into the fuselage. A second section that is connected to the upper pipe mouth of the suction pipe 354 is provided in the fuselage, and the upper end of the second section is connected to the first suction device in the fuselage (not shown in the figure). Such solutions that do not deviate from the inventive concept of this application are also within the protection scope of the present utility model, and no further examples will be given here.

[0093] The remaining structures of this embodiment and the beneficial effects produced by the structures are consistent with those of the first embodiment and will not be described in detail here.

[0094] Embodiment six:

[0095] The difference between the sixth embodiment and the first embodiment is that a second suction device is further provided.

[0096] The second suction channel 35 is arranged close to the second sealing plate 37, and the second suction port 351 is arranged on the second sealing plate 37. Figure 16As shown, the second suction channel 35 extends upward to the barrel cover 35, and the second suction device is arranged in the first suction channel 32. The second suction channel 35 includes a suction pipe 354, which extends upward into the first suction channel 32 and is connected to the second suction device 9. Of course, an alternative second suction device can also be arranged in the ventilation cavity. The second suction channel is independently provided with the first suction channel. In this embodiment, the second suction device is an air pump. Of course, the alternative second suction device may be a vacuum motor with lower power. The second suction channel extends around the second suction device, enclosing it, so as to form a good isolation between the second suction channel and the first suction channel, so that the air pump can independently suck the airflow of the second chamber. The air pump is arranged in the first suction channel. The air pump is relatively small and can better utilize the space in the first suction channel or the ventilation cavity. The structure is simpler, which facilitates the connection of the pipeline and avoids the possibility of air leakage. The second suction device connected to the suction pipe 354 is separately provided to facilitate the adjustment of the suction power of the second suction device according to actual use needs. For example, the second suction device can be set to have a suction power greater than the suction power of the first suction device, so that the gas in the second chamber 332 can be extracted faster than the gas in the first chamber 331, thereby quickly forming a pressure difference between the second chamber 332 and the first chamber 331, so as to achieve rapid absorption of the waste liquid in the first chamber 331 by the second chamber 332.

[0097] It is understandable that we can also set the second suction device on the bucket cover but not extend it into the first suction channel, but set it in the accommodating space formed by the upper shell and the lower shell on the outside of the ventilation cavity, and the second suction device is also set therein; or a through hole is set on the wall of the upper shell and sealedly connected to the second suction channel. At the same time, the second suction device and the second section of the second suction channel are set at the relative position of the fuselage, and one end of the second section is connected with the second suction device. When the sewage bucket is installed on the fuselage, the other end of the second section is sealed and connected with the through hole on the bucket cover; of course, it is understandable that the second suction device can also be set in the fuselage, and the second suction channel passes through the cover upward and is sealed and connected with the second section set in the fuselage.

[0098] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0099] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0100] The above are merely embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A surface cleaning machine with good dirt suction stability, comprising a body and a floor brush pivotally connected to each other, the floor brush including a dirt suction port, a first suction device and a dirty liquid bucket provided on the body, the dirty liquid bucket including a bucket cover and a bucket body, a dirt suction pipe provided on the dirty liquid bucket, an upper end of the dirt suction pipe extending into the bucket body, a first suction channel for connecting the bucket body and the first suction device provided on the bucket cover, characterized in that: The barrel body includes a first cavity and a second cavity located on one side of the lower part of the barrel body, the first cavity includes a liquid storage sub-cavity arranged side by side with the second cavity on the left and right, and a surge sub-cavity located above the liquid storage sub-cavity and the second cavity, the liquid storage sub-cavity and the second cavity are connected through a liquid inlet so that the dirty liquid in the first cavity flows into the second cavity through the liquid inlet, the first air suction port of the first suction channel and the upper end port of the sewage suction pipe are both arranged in the surge sub-cavity; it also includes a second suction channel at least partially located in the first cavity, and the second suction channel includes a second air suction port located in the second cavity.

2. The surface cleaning machine according to claim 1, characterized in that The second air suction port of the second suction channel is located at the upper part of the second cavity, and the liquid inlet is opened on the cavity wall of the second cavity close to the liquid storage sub-cavity.

3. The surface cleaning machine according to claim 2, characterized in that The liquid inlet is arranged below the middle of the second cavity; or, the liquid inlet is arranged at the lower part of the second cavity, and a liquid inlet channel is provided in the second cavity, one end of the liquid inlet channel is sealed and connected to the liquid inlet, and the other end extends to the upper part of the second cavity.

4. The surface cleaning machine according to claim 1, wherein The sewage liquid barrel further includes a first sealing plate and a second sealing plate. The first sealing plate and the second sealing plate respectively cooperate with the barrel wall of the sewage liquid barrel to separate the inner cavity of the sewage liquid barrel into the first cavity and the second cavity.

5. The surface cleaning machine according to claim 4, characterized in that The inner cavity of the sewage liquid barrel is flat and wide in the left and right directions and narrow in the front and back directions. The second sealing plate extends upward from the bottom wall of the barrel body and is sealed with the front side wall and the rear side wall of the barrel body respectively. The first sealing plate is connected to the upper end of the second sealing plate. The first sealing plate is transversely arranged in the barrel body and is sealed with the inner wall of the barrel body and the second sealing plate respectively to form the second cavity. The first sealing plate forms the top wall of the second cavity. The sewage suction pipe is arranged in the middle part of the sewage liquid barrel in the left and right directions, and extends upward from the bottom of the second cavity through the first sealing plate. The upper end of the sewage suction pipe extends into the first cavity; the second air suction port is located on the first sealing plate, or the second air suction port is located at the upper end of the second sealing plate corresponding to the second cavity, and the liquid inlet is arranged on the second sealing plate.

6. The surface cleaning machine according to claim 1, wherein A solid-liquid separation plate is further provided in the first cavity. The solid-liquid separation plate extends in a vertical direction and has two ends connected to the top wall of the second cavity and the barrel cover respectively.

7. The surface cleaning machine according to claim 1, wherein The dirty liquid bucket further includes a liquid baffle located around the second air suction port and extending into the second cavity.

8. The surface cleaning machine according to claim 1, wherein The effective flow area of ​​the second suction channel is smaller than that of the first suction channel. The second suction channel at least includes a suction pipe located in the first cavity, and the suction pipe extends upward along the direction of the sewage suction pipe.

9. The surface cleaning machine according to claim 8, characterized in that The dirty liquid barrel is arranged on the rear side of the fuselage, the sewage suction pipe and the suction pipe are both arranged on the front side wall of the dirty liquid barrel, the liquid inlet is arranged close to the rear side wall of the barrel body, the fuselage is in a flat state, and the second air intake is located above the liquid inlet and is staggered with the liquid inlet.

10. The surface cleaning machine according to claim 8, wherein One end of the suction pipe is connected to the second cavity through the second suction port, and the other end extends toward the first cavity and is connected to the first suction device through the first suction channel; alternatively, the surface cleaning machine further includes a second suction device arranged in the first suction channel, and the suction pipe is connected to the second suction device.

Images