Sewage tank, cleaning device

Abstract

The application provides a sewage tank and a cleaning device. The sewage tank is arranged in the cleaning device to contain dirt sucked during cleaning of the cleaning device. The sewage tank comprises a tank body, a tank cover for covering the tank body, a separation structure for being received in the tank body and dividing an internal space of the tank body into a sewage cavity and a separation cavity in communication with each other, the separation cavity being closer to the tank cover than the sewage cavity, and an active separation device at least partially received in the separation cavity. The cleaning device can use the active separation device to separate at least part of liquid in suction gas into the separation cavity when dirt is sucked. By arranging the active separation device at least partially received in the separation cavity, at least part of sewage brought into the suction gas can be separated by the active separation device, thereby reducing the sewage brought into an external driving device along with the suction gas.

Description

Technical Field

[0001] The embodiments in this application relate to the field of cleaning equipment technology, and in particular to a sewage tank and cleaning equipment. Background Technology

[0002] Currently, some cleaning equipment, such as floor scrubbers, usually have structures in the wastewater tank that block or separate water vapor, such as baffles or separation covers, to achieve water vapor separation.

[0003] However, in actual use, as the sewage level in the sewage tank gradually rises, the sewage is easily carried to the external drive device by the suction gas, which can lead to damage to the drive device. Utility Model Content

[0004] In view of this, several embodiments of this application aim to provide a sewage tank and cleaning equipment that can reduce the amount of sewage carried into the external drive device by the suction gas to a certain extent.

[0005] One embodiment of this application provides a wastewater tank for use in a cleaning device to contain dirt sucked up by the cleaning device during the cleaning process, comprising: a tank body; a tank cover for sealing the tank body; a partition structure for being housed within the tank body, dividing the internal space of the tank body into a communicating wastewater chamber and a separation chamber; the separation chamber being closer to the tank cover than the wastewater chamber; and an active separation device, at least partially housed within the separation chamber; the cleaning device can utilize the active separation device to separate at least a portion of the liquid in the sucked gas into the separation chamber when sucking up dirt.

[0006] In real life, users have increasingly higher and more demanding requirements for cleanliness, which in turn places higher demands on cleaning equipment, such as floor scrubbers. For example, they need to be able to clean while the machine is lying flat, and they need to have more flexible rotation angles for easier user operation. However, the implementation of all these functions may lead to water entering the power source of the machine. For instance, when the machine is lying flat, the sewage may be drawn into the power source due to the surging of water caused by pushing forward or pulling backward, resulting in water entering the power source.

[0007] Alternatively, during multi-angle turns, excessive left and right turns can cause sewage to be sucked into the power source. Based on this, some sewage tank structures have emerged on the market to prevent sewage from being sucked in. These structures use either active fans or multiple baffles to block sewage from entering the suction motor. However, these structures all have some drawbacks in the applicable scenarios. For example, sewage tanks with active fans are limited by their sewage capacity. When there is a lot of sewage in the tank while it is lying flat and the distance to the active fan is very close, the active fan cannot effectively separate the sewage. On the other hand, structures using multiple baffles will reduce the suction power. At the same time, each baffle has the problem of sewage climbing uphill. Sewage that adheres to the baffles may still enter the power source along the baffles.

[0008] This application effectively solves the above problems by setting up an active separation device in conjunction with a separation chamber. The separation chamber itself can effectively isolate the sewage chamber from the active separation device, so that the active separation device is not affected by the amount of sewage in the sewage chamber. Therefore, its limitation problem is relatively small. At the same time, the active separation device can also effectively prevent the sewage from climbing up the separation chamber. In other words, this application realizes the use of the separation chamber and the active separation device in multiple scenarios, which solves both the problem of limited sewage volume and the problem of sewage climbing up the separation chamber.

[0009] Optionally, the active separation device includes a centrifugal fan; wherein a water storage area is formed at the bottom of the separation chamber; and the centrifugal fan is located between the water storage area and the tank cover.

[0010] Optionally, the centrifugal fan is radially surrounded by the inner wall of the separation chamber, so that at least a portion of the liquid can flow through the inner wall into the water storage area.

[0011] Optionally, the water storage area is coaxially arranged with the centrifugal fan.

[0012] Optionally, the outer wall of the separation chamber is adapted to the inner wall of the housing to form a sealed connection.

[0013] Optionally, the partition structure can prevent the dirt contained in the sewage chamber from flowing into the separation chamber when the sewage tank is not in an upright state; wherein the sewage tank is in an upright state when the central axis of the sewage tank is tilted relative to the direction of gravity.

[0014] Optionally, the separation chamber and the sewage chamber have a communication port; wherein, when the sewage tank is not in an upright state, the height of the communication port along the direction of gravity is higher than the liquid level height on the side of the sewage chamber closest to the separation structure.

[0015] Optionally, the centrifugal fan includes a first centrifugal section composed of a plurality of centrifugal fan blades; wherein the projections of any adjacent centrifugal fan blades onto the target plane at least partially overlap; and the normal vector of the target plane is parallel to the axial direction of the centrifugal fan.

[0016] Optionally, the centrifugal fan blades may also have a protective plate arranged circumferentially along the first centrifugal section.

[0017] Optionally, at least one annular protrusion is provided on the periphery of the first centrifuge section; at least one annular groove corresponding to the position of the at least one annular protrusion is also formed between the centrifuge fan and the box cover; the at least one annular protrusion and the at least one annular groove cooperate with each other along the radial direction of the centrifuge fan to form a waterproof structure to block water vapor from the periphery of the first centrifuge section; wherein, the annular protrusion is located in the annular groove and does not contact the bottom and wall of the annular groove.

[0018] Optionally, the centrifugal fan further includes a second centrifugal section arranged around the waterproof structure; wherein the second centrifugal section includes a plurality of centrifugal blades distributed circumferentially along the first centrifugal section, and the centrifugal blades extend outward in a direction away from the waterproof structure.

[0019] Optionally, the sewage chamber has a suction pipe; the separation structure includes a guide pipe and a baffle extending from the bottom of the separation chamber into the sewage chamber; the guide pipe is sleeved with the suction pipe; wherein, an air outlet is provided on the side of the guide pipe; the baffle is positioned facing the air outlet.

[0020] Optionally, the separation chamber and the sewage chamber have a communication port; the baffle extends from the bottom of the communication port into the sewage chamber; wherein, the baffle has a first water vapor blocking part that bends from the baffle surface to the bottom of the sewage chamber on the side opposite to the air outlet.

[0021] Optionally, the first water vapor blocking part is connected to the end of the baffle near the communication port.

[0022] Optionally, the bending surface of the first water vapor blocking part is a curved surface.

[0023] Optionally, the baffle is further provided with a second water vapor blocking part that bends from the surface of the baffle into the sewage chamber on the side facing the air outlet.

[0024] One embodiment of this application provides a cleaning device including a wastewater tank as described above.

[0025] The embodiments provided in this application utilize a partition structure to divide the internal space of the sewage tank into a connected sewage chamber and a separation chamber. This allows for the isolation of sewage contained within the sewage chamber, and through an active separation device at least partially housed within the separation chamber, at least a portion of the liquid in the suction gas is separated into the separation chamber when the cleaning equipment suctions out dirt. In this way, at least a portion of the sewage carried into the suction gas can be separated by the active separation device, thereby reducing the amount of sewage carried into the external drive device along with the suction gas. Attached Figure Description

[0026] Figure 1 This is a perspective view of a sewage tank provided in one embodiment of this application.

[0027] Figure 2 This is a cross-sectional schematic diagram of a sewage tank provided in one embodiment of this application.

[0028] Figure 3 This is a cross-sectional schematic diagram of a sewage tank in a non-upright state according to one embodiment of this application.

[0029] Figure 4 This is a three-dimensional schematic diagram of a centrifugal fan in a sewage tank according to one embodiment of this application.

[0030] Figure 5 This is a cross-sectional schematic diagram of a centrifugal fan in a sewage tank according to one embodiment of this application.

[0031] Figure 6 This is a schematic diagram of the projection of a centrifugal fan in a sewage tank onto a target plane, provided as an embodiment of this application.

[0032] Figure 7 This is a three-dimensional schematic diagram of the separation chamber and partition structure in a sewage tank according to an embodiment of this application.

[0033] Figure 8 This is a cross-sectional schematic diagram of the separation chamber and partition structure in a sewage tank according to an embodiment of this application.

[0034] Explanation of reference numerals in the attached figures:

[0035] 100. Wastewater tank; 101. Tank cover; 102. Tank body; 103. Separation chamber; 104. Wastewater chamber; 1031. Water storage area; 105. Centrifugal fan; 1032. Inner wall; 106. First centrifugal section; 107. Second centrifugal section; 1061. Centrifugal fan blade; 108. Protective plate; 109. Waterproof structure; 1091. Annular protrusion; 1092. Annular groove; 1071. Centrifugal blade; 110. Separation structure; 111. Suction pipe; 1101. Guide pipe; 1102. Baffle; 1103. Partition; 112. Air outlet; 113. Connecting port; 114. First water vapor barrier; 115. Second water vapor barrier; 116. Motor bracket. Detailed Implementation

[0036] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0037] In this application, the accompanying drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features.

[0038] Unless otherwise stated, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items. The singular forms "a," "the," and "the" as used in embodiments of this application are also intended to include the plural forms unless the context clearly indicates otherwise.

[0039] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0040] In the description of this application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this application and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. In other words, they should not be construed as limitations on this application.

[0041] In the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "linking," "fixing," "setting," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0042] Currently, cleaning equipment is typically equipped with a wastewater tank to collect and hold dirt and grime pumped up from the ground, including sewage and solids. In related technologies, to prevent backflow of dirt, the wastewater tank is usually equipped with baffles or separation hoods to block or separate water vapor.

[0043] During actual use, as the sewage level in the sewage tank gradually rises, the sewage is easily carried out of the tank by the suction gas and comes into contact with external drive devices, including the suction motor and drive motor. For example, when the cleaning equipment is operating for a long time, the sewage tank contains a large amount of sewage. When the sewage level is high, the sewage is easily drawn into the suction gas due to negative pressure and then flows with the suction gas to the external drive devices. Similarly, when the sewage level in the tank is high, the sewage in the tank is prone to surges and fluctuations when the cleaning equipment is moved on uneven ground or tilted. In this case, the sewage is more easily carried out by the suction gas. Once sewage enters the external drive devices, it can easily cause electrical short circuits, corrosion of mechanical parts, or other forms of damage, seriously affecting the function and reliability of the cleaning equipment.

[0044] Therefore, it is necessary to provide a wastewater tank that can reduce the amount of wastewater carried into the external drive unit by the pumped gas to a certain extent.

[0045] Please see Figure 1 and Figure 2 One embodiment of this application provides a sewage tank 100, including a tank cover 101 and a tank body 102.

[0046] In this embodiment, the wastewater tank 100 can be installed in cleaning equipment, such as a robotic vacuum cleaner, a floor scrubber, or a self-cleaning base station. Specifically, in a floor scrubber, the wastewater tank 100 can be located at the front or middle of the machine body and is detachable from the machine body. The wastewater tank 100 can also be connected to a fan system, a suction assembly, and a roller brush assembly to achieve overall floor cleaning functionality.

[0047] In this embodiment, the wastewater tank 100 can be used to hold dirt, such as wastewater, particulate matter, hair or debris, and other solid matter, sucked up by the cleaning equipment during the cleaning process.

[0048] In this embodiment, the cover 101 can be located on top of the sewage tank 100 to cover the tank body 102. Specifically, the cover 101 is detachable from the tank body 102 for easy cleaning and maintenance. In some embodiments, the cover 101 can communicate with the air duct of the blower system to ensure that the suction gas can enter the blower system and be smoothly discharged. In some embodiments, a filter screen can be provided on the top of the cover 101 to block fine particulate matter in the airflow.

[0049] In this embodiment, the housing 102 can serve as a container for storing waste. Specifically, for example, the housing 102 can be connected to the roller brush assembly via a suction pipe to guide the waste brought up by the roller brush assembly when cleaning the floor into the wastewater tank 100.

[0050] In this embodiment, reference Figure 2 The internal space of the housing 102 can be divided into a separation chamber 103 and a sewage chamber 104 by a partition structure. The sewage chamber 104 can be located at the bottom of the housing 102 and is used to store the sucked-up waste and the sewage separated in the separation chamber 103. The separation chamber 103 can be located between the housing cover 101 and the sewage chamber 104, i.e., it is disposed on the sewage chamber 104. In this embodiment, a flow port is provided between the separation chamber 103 and the sewage chamber 104 to allow sewage in the separation chamber 103 to flow into the sewage chamber 104.

[0051] In this embodiment, the partition structure 110 is housed within the tank 102 to serve as the dividing boundary between the sewage chamber 104 and the separation chamber 103, thus forming a double-chamber structure within the tank 102. Specifically, the partition structure 110 can be connected to the tank cover 101, located inside the tank 102 when the sewage tank is in operation, and can be removed together when the tank cover 101 is disassembled from the tank 102, facilitating cleaning and maintenance. Of course, in some possible embodiments, the partition structure 110 can also be connected to the tank 102 and can also be disassembled separately for cleaning.

[0052] In this embodiment, the partition structure 110 may include a partition 1103 serving as the bottom of the separation chamber 103, and a guide pipe 1101 and a baffle 1102 extending from the bottom of the separation chamber 103 into the sewage chamber 104. It should be noted that in some possible embodiments, the partition structure may employ other structures different from those in this embodiment. For example, the guide pipe 1101 and baffle 1102 are not necessarily required, and the partition structure may consist only of the partition 1103. Furthermore, the partition structure may also be composed of partitions of other shapes; this application does not impose specific limitations on this, as long as the partition structure can achieve the function of separating the separation chamber and the sewage chamber.

[0053] In this embodiment, there is a communication port 113 between the separation chamber 103 and the sewage chamber 104, so that the gas drawn in the sewage chamber 104 can enter the separation chamber 103, and be discharged from the sewage tank 100 after gas-liquid separation through the separation chamber 103.

[0054] In this embodiment, the wastewater chamber 104 has a suction pipe 111. When the cleaning equipment is working, dirt can be sucked into the wastewater chamber 104 through the suction pipe 111. Due to the negative pressure, the suction gas enters the separation chamber 103 through the communication port 113 between the separation chamber 103 and the wastewater chamber 104.

[0055] In this embodiment, the bottom of the separation chamber 103 has a water storage area 1031. The water storage area 1031 can serve as a temporary storage area for the separated wastewater. Specifically, during the operation of the cleaning equipment, after water vapor enters the separation chamber 103, the separated wastewater can collect in the water storage area 1031. The flow port between the separation chamber 103 and the wastewater chamber 104 can be located at the bottom of the water storage area 1031. In this way, the wastewater collected in the water storage area 1031 can be discharged into the wastewater chamber 104.

[0056] Optionally, a one-way valve is provided at the bottom of the water storage area 1031 to control the sewage to flow only to the sewage chamber 104. When the one-way valve is open, it serves as a flow port between the separation chamber 103 and the sewage chamber 104.

[0057] In this embodiment, a centrifugal fan 105 is also provided between the water storage area 1031 and the tank cover 101, and the centrifugal fan 105 is at least partially housed within the separation chamber 103. Specifically, the centrifugal fan 105 can be an active separation device driven by a motor. The motor can be located between the tank cover 101 of the sewage tank 100 and the centrifugal fan 105. The motor and the centrifugal fan 105 can be coaxially connected. Driven by the motor, the centrifugal fan 105 can generate a centrifugal force field through its high-speed rotation. When water vapor in the separation chamber 103 enters the centrifugal fan 105, because the density of water droplets is much greater than that of air, it will be thrown out under the action of centrifugal force, deviating from the airflow path. Due to its large inertia, the water droplets cannot follow the airflow to make a sharp turn and will eventually slide down to the water storage area 1031, and then flow into the sewage chamber 104.

[0058] It should be noted that, in addition to the centrifugal fan 105, other active separation devices may be used as alternatives in some possible embodiments, such as ultrasonic separators, vibration filters, etc. The active separation device is at least partially housed within the separation chamber, such that at least a portion of the liquid separated by it is located within the separation chamber and can be collected into the water storage area.

[0059] In this embodiment, a partition structure divides the internal space of the sewage tank into a connected sewage chamber and a separation chamber. This allows for the isolation of sewage contained in the sewage chamber. Furthermore, an active separation device, at least partially housed within the separation chamber, separates at least a portion of the liquid from the suction gas into the separation chamber when the cleaning equipment is pumping out dirt. Thus, at least a portion of the sewage carried into the suction gas can be separated by the active separation device, thereby reducing the amount of sewage carried into the external drive device along with the suction gas.

[0060] Furthermore, due to the simple internal structure of the separation chamber 103 and the centrifugal fan 105 located inside the separation chamber 103 and above the water storage area 1031, the separated wastewater can directly and efficiently flow into the water storage area 1031. The flow of wastewater from being separated from the air to flowing into the water storage area 1031 is less obstructed, and it is less likely to cause problems such as blockage or stagnation. Therefore, it can reduce the residue and accumulation of dirt.

[0061] Furthermore, the centrifugal fan 105 in this embodiment, besides having a good water vapor separation effect, can also promote the flow of sewage within the separation chamber 103, thereby reducing the generation of residual pollutants. Specifically, the continuous operation of the centrifugal fan 105 can maintain a spiral airflow within the separation chamber 103 and form an air pressure gradient between the top and bottom of the separation chamber 103. Under the combined action of the shearing traction of the spiral airflow and the air pressure gradient, the sewage droplets formed within the separation chamber 103 flow faster, reducing stagnation and residue during the flow process, and achieving efficient collection of sewage to the storage area 1031.

[0062] In some embodiments, the centrifugal fan 105 is radially surrounded by the inner wall 1032 of the separation chamber 103, so that the sewage thrown out by the centrifugal fan 105 will not enter other areas. The sewage can flow smoothly into the water storage area 1031 after hitting the inner wall 1032, thereby improving the efficiency of sewage collection in the water storage area 1031 and reducing the retention of sewage in other areas.

[0063] In some embodiments, the water storage area 1031 has sidewalls extending circumferentially along the centrifugal fan 105, allowing wastewater to flow smoothly along a smooth path within the water storage area 1031. Specifically, for example, the water storage area 1031 may be an annular groove surrounded by the inner sidewall 1032 of the separation chamber 103, with its two side walls having an annular profile. The annular groove walls can guide the wastewater in the water storage area 1031, reducing potential blockages and stagnation during flow. In some embodiments, the water storage area 1031 may also be an arc-shaped groove, its body being a portion of the aforementioned annular groove, extending only circumferentially along the centrifugal fan 105 but not closed. It is understood that the two side walls of the water storage area 1031 may also have an arc-shaped profile.

[0064] It should be noted that in some possible embodiments, the water storage area 1031 can also be designed as a structure of other shapes, such as a conical structure, a cylindrical structure, a spiral groove structure, etc. This application does not make specific limitations in this regard.

[0065] In some embodiments, the water storage area 1031 and the centrifugal fan 105 can be arranged coaxially. This can improve the uniformity of the distribution of wastewater ejected by the centrifugal fan 105 in the water storage area 1031 and prevent the accumulation of dirt in the water storage area 1031.

[0066] In some embodiments, the outer wall of the separation chamber 103 is adapted to form a sealed connection with the inner wall 1032 of the housing 102. This reduces the airflow exchange path between the separation chamber 103 and the wastewater chamber 104. Specifically, as... Figure 2 As shown, apart from the connecting port 113 on the side of the separation chamber 103, there is no other airflow path between it and the sewage chamber 104. This creates two nearly independent negative pressure chambers for the separation chamber 103 and the sewage chamber 104, enabling decoupling of the negative pressure function and improving the performance and cleaning efficiency of the cleaning equipment.

[0067] In some embodiments, the outer wall of the separation chamber 103 and the inner wall 1032 of the housing 102 can be mechanically sealed, or the space between the outer wall of the separation chamber 103 and the inner wall 1032 of the housing 102 can be sealed by filling the space with materials such as rubber and silicone.

[0068] Please see Figure 3In some scenarios where cleaning equipment is used, the wastewater tank 100 may be in a non-upright state. For example, when cleaning under beds or sofas, the cleaning equipment needs to be tilted at a certain angle or laid flat so that the roller brush can reach these areas for cleaning. In this case, the central axis of the wastewater tank 100 is tilted relative to the direction of gravity, i.e., it is not upright. When the wastewater tank 100 is not upright, the dirt contained in the wastewater chamber 104 will naturally flow towards the lid 101 under the action of gravity, which can easily lead to backflow. Especially when the wastewater tank 100 is laid flat, as in the above-mentioned usage scenarios, the cleaning equipment needs to be dragged back and forth during cleaning, causing the dirt in the wastewater chamber 104 to surge, which can easily lead to backflow.

[0069] Therefore, by setting the partition structure 110, when the sewage tank 100 is not in an upright state, the dirt contained in the sewage chamber 104 can be blocked from flowing to the separation chamber 103, so as to effectively prevent the dirt from flowing back.

[0070] In some embodiments, since an air exchange path needs to be established between the separation chamber 103 and the sewage chamber 104, a connection port 113 is required between the separation chamber 103 and the sewage chamber 104. However, in usage scenarios where the sewage tank 100 is not in an upright state, if the connection port 113 between the separation chamber 103 and the sewage chamber 104 is located at a low position in the direction of gravity, dirt in the sewage chamber 104 can still easily flow into the separation chamber 103 from the connection port 113, thus causing a backflow problem.

[0071] Therefore, in some embodiments, when the sewage tank 100 is not in an upright state, the height of the connection port 113 between the separation chamber 103 and the sewage chamber 104 along the direction of gravity is higher than the liquid level height on the side of the sewage chamber 104 near the partition structure 110, which can prevent dirt in the sewage chamber 104 from flowing into the separation chamber 103 under the action of gravity.

[0072] In some embodiments, reference Figure 4 and Figure 5 and combined Figure 2 The centrifugal fan 105 includes a first centrifugal section 106 composed of a plurality of centrifugal fan blades 1061. Optionally, the centrifugal fan blades 1061 may be flat blades, which can enhance the suction power of the cleaning equipment.

[0073] In some embodiments, the projections of any adjacent centrifugal fan blades 1061 onto the target plane at least partially overlap. The normal vector of the target plane is parallel to the axial direction of the centrifugal fan 105. Specifically, the target plane can be any plane perpendicular to the axial direction of the centrifugal fan 105. Figure 2 The center can be the plane where the bottom of the sewage tank 100 is located. For example, refer to... Figure 6With the axial direction of the centrifugal fan 105 as the viewing angle, there are no gaps between any adjacent centrifugal fan blades 1061 in the centrifugal fan 105. In this way, it can effectively prevent sewage from entering the air duct of the suction gas through the gaps between the fan blades during the rotation of the fan blades, and then being carried into the external drive device.

[0074] In some embodiments, the centrifugal fan blade 1061 is further provided with a protective plate 108 arranged circumferentially around the first centrifugal section 106. The protective plate 108 surrounding the centrifugal fan blade 1061 can improve the structural strength of the centrifugal fan blade 1061, and at the same time can prevent sewage from entering from the side of the first centrifugal section 106, thus playing a certain blocking role.

[0075] In some embodiments, the protective plate 108 may be coaxially arranged with the first centrifugal section 106, and the width of the protective plate 108 is greater than the width of the first centrifugal section 106 along the axial direction of the first centrifugal section 106.

[0076] In some embodiments, the projection of the protective plate 108 onto the target plane forms a fan blade region. The projection of the first centrifugal section 106 onto the target plane fills the fan blade region. Thus, there are virtually no gaps between the outer edges of the plurality of centrifugal fan blades 1061 of the first centrifugal section 106 and the protective plate 108, effectively blocking wastewater.

[0077] In some embodiments, since the centrifugal fan 105 rotates as a whole during operation, its sides or periphery need to be connected to other components with a clearance fit. In this case, water vapor can easily enter through the gap and then enter the external drive device along with the sucked gas.

[0078] In some embodiments, such as Figure 5 As shown, at least one annular protrusion 1091 may be formed on the periphery of the first centrifugal section 106. The at least one annular protrusion 1091 may be distributed sequentially and outwardly along the radial direction of the centrifugal fan 105. In some embodiments, a motor for driving the centrifugal fan 105 to rotate and a motor bracket 116 for supporting the motor are disposed between the centrifugal fan 105 and the casing cover 101. At least one annular groove 1092 is formed on the motor bracket 116, corresponding to the positions of the at least one annular protrusion 1091. The at least one annular groove 1092 is also distributed sequentially and outwardly along the radial direction of the centrifugal fan 105, and the at least one annular protrusion 1091 and the at least one annular groove 1092 cooperate with each other along the radial direction of the centrifugal fan to form a waterproof structure 109.

[0079] In some embodiments, the centrifugal fan 105 and at least one annular protrusion 1091 on its periphery are integrally formed components. When driven to rotate by a motor, the annular protrusion 1091 rotates together. Therefore, the annular protrusion 1091 and the annular groove 1092 on the motor bracket need to be in clearance fit. That is, the annular protrusion 1091 is located inside the annular groove 1092 and does not contact the bottom or wall of the annular groove 1092 to ensure that the centrifugal fan 105 can rotate normally. In this way, at least one annular protrusion 1091 and at least one annular groove 1092 cooperate with each other to form an airflow path similar to a maze channel from the inside to the outside along the radial direction of the centrifugal fan 105, making it difficult for water vapor to enter through the gaps, thereby blocking water vapor from the periphery of the first centrifugal section 106.

[0080] In some embodiments, the centrifugal fan 105 may further include a second centrifugal section 107 disposed around the waterproof structure 109. The second centrifugal section 107 includes a plurality of centrifugal blades 1071 distributed circumferentially along the protective plate 108, the centrifugal blades 1071 extending outwards in a direction away from the waterproof structure 109. By providing the second centrifugal section 107, moisture from the periphery of the first centrifugal section 106 can be further blocked, and wastewater can be flung outwards by the centrifugal blades 1071.

[0081] At the same time, by setting up a second centrifugal section 107, the amount of water vapor entering the waterproof structure 109 can be reduced, preventing sewage from accumulating inside and becoming difficult to clean.

[0082] Please continue reading. Figure 2 and refer to Figure 7 and Figure 8 In some embodiments, the partition structure 110 may further include a guide pipe 1101 and a baffle 1102 extending from the bottom of the separation chamber 103 into the sewage chamber 104. The guide pipe 1101 can guide the suction gas drawn in by the suction pipe 111 to flow into the communication port 113 in a specific direction, and perform initial separation on its flow path, blocking some sewage and solids carried in by the suction gas.

[0083] Specifically, the guide pipe 1101 and the baffle 1102 can extend downward from the partition 1103 at the bottom of the separation chamber, and the bottom of the guide pipe 1101 can be connected to the suction pipe 111 so that the suction gas drawn up by the suction pipe 111 can flow through the guide pipe 1101.

[0084] In some embodiments, the guide pipe 1101 has an air outlet 112 on its side, and a baffle 1102 is disposed facing the air outlet 112. Water vapor is guided to flow out from the side air outlet 112, and the baffle 1102, in conjunction with the partition 1103, prevents water vapor from flowing back upwards. Furthermore, since the baffle 1102 extends into the sewage chamber 104, the sewage and solids initially separated by the guide pipe 1101 can flow downwards into the sewage chamber 104 along the baffle 1102.

[0085] In some embodiments, the baffle 1102 extends from the bottom of the connection port 113 into the sewage chamber 104, causing sewage adhering to the baffle 1102 to climb up the wall and enter the connection port 113 under negative pressure. This upward climbing is particularly severe when the level of dirty liquid in the sewage chamber 104 is high.

[0086] In some embodiments, the baffle 1102 has a first water vapor blocking portion 114 that bends from the surface of the baffle 1102 toward the bottom of the sewage chamber 104 on the side opposite to the air outlet 112. By providing the first water vapor blocking portion 114, the rising sewage is blocked, preventing it from entering the connecting port 113. The first water vapor blocking portion 114 bends toward the bottom of the sewage chamber 104, which can guide the rising sewage back into the sewage chamber 104. Specifically, the first water vapor blocking portion 114 can be provided at any position in the extending direction of the baffle 1102, for example, it can be provided at the middle position in the extending direction of the baffle 1102 and connected to the baffle 1102.

[0087] Optionally, the first water vapor blocking part 114 is connected to the end of the baffle 1102 near the connecting port 113, so that sewage attached at various positions can be blocked before it climbs up the baffle 1102 and enters the connecting port 113, thus avoiding leakage.

[0088] Optionally, the bending surface of the first water vapor blocking part 114 is curved, which can improve the efficiency of sewage flowing back to the sewage chamber 104 after being blocked by the first water vapor blocking part 114, and avoid stagnation.

[0089] In some embodiments, the baffle 1102 is further provided with a second water vapor blocking part 115 that bends from the surface of the baffle 1102 into the sewage chamber 104 on the side facing the air outlet 112. Since water vapor flows out of the air outlet 112, it first flows from the side of the baffle 1102 facing the air outlet 112 towards the bottom of the sewage chamber 104, and then flows upward into the connecting port 113, the second water vapor blocking part 115 on the side of the baffle 1102 facing the air outlet 112 can also block and separate some water vapor, so as to prevent it from going around to the other side of the baffle 1102 and climbing up to the connecting port 113.

[0090] Optionally, the second water vapor blocking part 115 can be configured to be connected to the end of the baffle 1102 away from the connecting port 113. The ribs provided at both ends of the baffle 1102 can effectively solve the problem of sewage climbing up the wall of the baffle 1102.

[0091] It should be noted that, as Figure 7 and Figure 8 As shown, the partition structure 110 and its components in this application, and the parts forming the partition cavity 103, such as the sidewall of the partition cavity 103, may be integrally formed.

[0092] Another embodiment of this application provides a cleaning device, including a wastewater tank as described in the foregoing embodiments.

[0093] In some embodiments, the cleaning equipment may be a floor scrubber, which may include other functional components in addition to the wastewater tank as described above, such as a clean water tank, a water spraying assembly, a suction assembly, a roller brush assembly, a drive assembly, etc.

[0094] It is understood that the specific examples in this document are only intended to help those skilled in the art better understand the embodiments of this application, and are not intended to limit the scope of the invention.

[0095] It is understood that in the various embodiments of this application, the sequence number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0096] It is understood that the various embodiments described in this application can be implemented individually or in combination, and the embodiments of this application are not limited in this respect.

[0097] It is understood that in the description of this application, when describing the structure of a component, when referring to a layer or region as being "above" or "on top of" another layer or region, it may mean that it is directly above another layer or region, or that it contains other layers or regions between itself and another layer or region. Furthermore, if the component is flipped, the layer or region will be located "below" or "under" another layer or region.

[0098] The above description is merely a specific embodiment of this application, but the protection scope of this invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the protection scope of this application.

Claims

1. A sewage tank, characterized in that, For placement within a cleaning device to contain dirt sucked up during the cleaning process, including: Box; A lid for sealing the box body; A partition structure, used to house the box, divides the internal space of the box into a connected sewage chamber and a separation chamber; the separation chamber is closer to the box cover than the sewage chamber. An active separation device is at least partially housed within the separation chamber; the cleaning equipment can utilize the active separation device to separate at least a portion of the liquid from the suction gas into the separation chamber when suctioning out dirt.

2. The sewage tank according to claim 1, characterized in that, The active separation device includes a centrifugal fan; wherein a water storage area is formed at the bottom of the separation chamber; and the centrifugal fan is located between the water storage area and the tank cover.

3. The sewage tank according to claim 2, characterized in that, The centrifugal fan is radially surrounded by the inner wall of the separation chamber, so that at least a portion of the liquid can flow through the inner wall into the water storage area.

4. The sewage tank according to claim 3, characterized in that, The water storage area is coaxially arranged with the centrifugal fan.

5. The sewage tank according to claim 1, characterized in that, The outer wall of the separation chamber is adapted to the inner wall of the housing to form a sealed connection.

6. The sewage tank according to claim 1, characterized in that, The separation structure can prevent the dirt contained in the sewage chamber from flowing into the separation chamber when the sewage tank is not in an upright state; wherein the sewage tank is in an upright state when the central axis of the sewage tank is tilted relative to the direction of gravity.

7. The sewage tank according to claim 6, characterized in that, The separation chamber and the sewage chamber have a communication port; wherein, when the sewage tank is not in an upright state, the height of the communication port along the direction of gravity is higher than the liquid level height on the side of the sewage chamber closest to the separation structure.

8. The sewage tank according to claim 2, characterized in that, The centrifugal fan includes a first centrifugal section composed of a plurality of centrifugal fan blades; wherein the projections of any adjacent centrifugal fan blades onto a target plane at least partially overlap; the normal vector of the target plane is parallel to the axial direction of the centrifugal fan.

9. The sewage tank according to claim 8, characterized in that, The centrifugal fan blades also have a protective plate arranged circumferentially along the first centrifugal section.

10. The sewage tank according to claim 8, characterized in that, At least one annular protrusion is provided on the periphery of the first centrifuge section; at least one annular groove corresponding to the position of the at least one annular protrusion is also formed between the centrifuge fan and the box cover; the at least one annular protrusion and the at least one annular groove cooperate with each other along the radial direction of the centrifuge fan to form a waterproof structure to block water vapor from the periphery of the first centrifuge section; wherein, the annular protrusion is located in the annular groove and does not contact the bottom and wall of the annular groove.

11. The sewage tank according to claim 10, characterized in that, The centrifugal fan further includes a second centrifugal section arranged around the waterproof structure; wherein the second centrifugal section includes a plurality of centrifugal blades distributed circumferentially along the first centrifugal section, and the centrifugal blades extend outward in a direction away from the waterproof structure.

12. The sewage tank according to claim 1, characterized in that, The sewage chamber has a suction pipe; the separation structure includes a guide pipe and a baffle extending from the bottom of the separation chamber into the sewage chamber; the guide pipe is sleeved with the suction pipe; wherein, an air outlet is opened on the side of the guide pipe; the baffle is arranged facing the air outlet.

13. The sewage tank according to claim 12, characterized in that, The separation chamber and the sewage chamber have a communication port; the baffle extends from the bottom of the communication port into the sewage chamber; wherein, the baffle is provided with a first water vapor blocking part that bends from the baffle surface to the bottom of the sewage chamber on the side opposite to the air outlet.

14. The sewage tank according to claim 13, characterized in that, The first water vapor blocking part is connected to the end of the baffle near the communication port.

15. The sewage tank according to claim 14, characterized in that, The bending surface of the first water vapor blocking part is a curved surface.

16. The sewage tank according to any one of claims 12 to 15, characterized in that, The baffle is further provided with a second water vapor blocking part that bends from the surface of the baffle into the sewage chamber on the side facing the air outlet.

17. A cleaning device, characterized in that, Includes the wastewater tank as described in any one of claims 1 to 16.

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