A purification device

Abstract

The application provides a purification device, comprising a shell, a filter assembly and an impeller, the shell has a liquid storage cavity, a liquid outlet and a liquid return port, the liquid storage cavity is communicated with the liquid outlet and the liquid return port; the filter assembly is arranged outside the shell, connected with the shell and communicated with the liquid outlet and the liquid return port; the impeller is rotatably arranged in the liquid storage cavity and used to drive the liquid in the liquid storage cavity to circulate between the liquid storage cavity and the filter assembly. When the liquid storage cavity contains a suspension liquid, the impeller rotates to make the suspension liquid rotate in the liquid storage cavity under the action of centrifugal force, so as to reduce the interaction force between particles in the suspension liquid, and the filter assembly is arranged to communicate the liquid storage cavity through the liquid outlet and the liquid return port, so as to make the suspension liquid circulate between the liquid storage cavity and the filter assembly, further reduce the interaction force between particles in the suspension liquid, and then make the solid particles in the suspension liquid accelerate deposition under the joint action of gravity and centrifugal force.

Description

Technical Field

[0001] This application relates to the field of cleaning equipment technology, and more particularly to a purification device. Background Technology

[0002] With the continuous development of technology, cleaning robots are being widely used in people's daily lives. For example, cleaning robots can collect dirt from the ground to clean it. The collected dirt is then transported to a wastewater tank, where it is stored as a suspension. The low visibility and transparency of the suspension in the wastewater tank make it difficult for solid particles to settle. Summary of the Invention

[0003] To at least partially solve the above problems, this application provides a purification device, including a housing, a filter assembly, and an impeller. The housing has a liquid storage chamber, a liquid outlet, and a liquid return port, and the liquid storage chamber is connected to both the liquid outlet and the liquid return port. The filter assembly includes a flow guide and a filter element. The flow guide is disposed outside the housing and connected to the housing. The flow guide has a flow channel that is connected to both the liquid outlet and the liquid return port. The filter element is disposed inside the flow channel and outside the housing, connected to the housing, and connected to both the liquid outlet and the liquid return port. The impeller assembly is rotatably installed in the liquid storage chamber to drive the liquid in the liquid storage chamber through the liquid outlet, the flow channel, and the liquid return port in sequence, so that the liquid in the liquid storage chamber can circulate between the liquid storage chamber and the flow channel of the filter assembly.

[0004] The purification device based on the embodiments of this application opens a liquid storage chamber inside the housing and installs a rotatable impeller assembly inside the liquid storage chamber. When the liquid storage chamber contains a suspension, the impeller assembly rotates to make the suspension rotate in the liquid storage chamber under the action of centrifugal force, thereby reducing the interaction force between particles in the suspension. By setting a filter assembly connected to the liquid storage chamber through the liquid outlet and the liquid return port, the suspension can realize a circulation process between the liquid storage chamber and the filter assembly, further reducing the interaction force between particles in the suspension, thereby accelerating the deposition of solid particles in the suspension under the combined action of gravity and centrifugal force.

[0005] Furthermore, the impeller assembly includes a central rotating shaft and multiple blades. The multiple blades are connected to the central rotating shaft, and each blade has a free end away from the central rotating shaft. The distance between the free end and the inner wall of the housing in the length extension direction of the blade is a first distance. The multiple free ends and the inner wall of the housing form an acceleration space. Along the rotation direction of the impeller assembly, the same blade passes through the acceleration space, the liquid outlet, and the liquid return port in sequence. Within the acceleration space, along the rotation direction of the impeller assembly, the first distance corresponding to different free ends gradually increases.

[0006] Based on the above embodiments, as the first distances corresponding to different free ends gradually increase along the rotation direction of the impeller assembly, multiple different free ends form an acceleration space with the inner wall of the casing. Within the acceleration space, the kinetic energy of the suspension continuously increases along the rotation direction of the impeller assembly. Since the same blade passes through the acceleration space, the outlet, and the return port sequentially, the acceleration space allows the suspension to have greater kinetic energy when entering the outlet, thus allowing it to flow more smoothly into the storage chamber through the return port. This makes the circulation process of the suspension between the storage chamber and the filter assembly more convenient and faster, thereby accelerating the deposition of solid particles in the suspension.

[0007] Furthermore, the central shaft is eccentrically positioned relative to the housing to achieve a gradual increase in the first distance between different free ends along the rotation direction of the impeller assembly within the acceleration space.

[0008] Based on the above embodiments, in order to make the impeller assembly eccentrically positioned relative to the housing, each blade in the impeller assembly has the same shape, the same distance between the free end and the central axis, and is evenly distributed circumferentially along the central axis. At this time, the impeller assembly is symmetrical about the central axis, and the area of ​​the fan-shaped region swept by each blade in the same time period is the same.

[0009] Furthermore, as the impeller assembly rotates, the length of the blade currently passing through the outlet is greater than the length of the next blade that will pass through the outlet, so that the first distance corresponding to different free ends gradually increases along the rotation direction of the impeller assembly within the acceleration space.

[0010] Based on the above embodiments, in order to ensure that when the impeller assembly rotates, the length of the blade currently passing through the outlet is greater than the length of the next blade to pass through the outlet, each blade in the impeller assembly has the same shape, the distance between the free end and the central axis is different, and they are evenly distributed along the circumference of the central axis. At this time, the area of ​​the fan-shaped region swept by each blade in the same time is different. The impeller assembly is an eccentric impeller assembly, that is, when the impeller assembly rotates around the central axis, the torque of each blade relative to the central axis is different.

[0011] Furthermore, within the acceleration space, the inner wall of the shell and the outlet wall intersect at a point, and the first distance corresponding to the free end pointing to the intersection point along the length extension direction of the blade is greater than the first distance corresponding to the other free ends.

[0012] Based on the above embodiments, the outlet is located at the end of the acceleration space so that the suspension has greater kinetic energy at the outlet, which is more conducive to realizing the circulation process of the suspension between the storage chamber and the filter assembly.

[0013] Furthermore, the shell includes a bottom plate and a side plate connected to the bottom plate. The side plate and the bottom plate together form a liquid storage cavity. The liquid outlet is opened on the bottom plate or the side plate, and the liquid return port is opened on the bottom plate or the side plate.

[0014] Based on the above embodiments, there are four possible configurations for the outlet and return port: 1. Both the outlet and return port are located on the bottom plate; 2. Both the outlet and return port are located on the side plate; 3. The outlet is located on the side plate, and the return port is located on the bottom plate; 4. The outlet is located on the bottom plate, and the return port is located on the side plate. Based on these four configurations, it is understandable that the location of the outlet and return port will affect the circulation process of the suspension between the storage chamber and the filter assembly.

[0015] Furthermore, the return port is located on the bottom plate, the outlet port is located on the side plate, and the projection of the impeller assembly along its own axis onto the bottom plate covers at least 1 / 3 of the opening area of ​​the return port.

[0016] Based on the above embodiment, the return port is located on the bottom plate, and the outlet is located on the side plate. In this case, the height of the outlet 22 from the bottom plate is greater than the height of the return port. During the flow of the suspension within the filter assembly, the gravitational potential energy of the suspension is converted into kinetic energy, and gravity does positive work during the flow, thus facilitating the circulation of the suspension between the storage chamber and the filter assembly. The projection of the impeller assembly along its axial direction onto the bottom plate covers at least 1 / 3 of the opening area of ​​the return port. This allows for more precise control of the flow velocity of the suspension at the return port within the storage chamber, thereby controlling the circulation speed of the suspension between the storage chamber and the filter assembly by controlling the rotational speed of the impeller assembly.

[0017] Furthermore, both the liquid outlet and the liquid return port are located on the base plate. The projection of the impeller assembly along its own axis on the base plate is offset from the liquid outlet and covers at least 1 / 3 of the opening area of ​​the liquid return port.

[0018] Based on the above embodiments, when the impeller assembly covers the return port, the flow velocity of the suspension in the storage chamber is greater than that in the filter assembly at the return port. Therefore, the pressure of the suspension at the return port is less than that at the outlet port. Under the action of the pressure difference, the suspension flows into the filter assembly through the outlet port and then into the storage chamber through the return port.

[0019] Furthermore, the side plate includes an arc-shaped plate and a straight plate, the arc-shaped plate being connected to the bottom plate; the straight plate being connected to the arc-shaped plate and the bottom plate, and together with the arc-shaped plate and the bottom plate forming a liquid storage cavity, the straight plate having a liquid outlet.

[0020] Based on the above embodiments, when a portion of the suspension changes its original trajectory due to the restriction of the straight plate, the suspension loses some kinetic energy due to impact with the straight plate. That is, at the instant the portion of the suspension whose original trajectory has been changed touches the straight plate, the kinetic energy of the suspension decreases, and the reduced kinetic energy is converted into potential energy. The potential energy converted by the suspension acts on the straight plate in the form of pressure energy. Since there is an outlet on the straight plate, when the suspension acts on the straight plate in the form of pressure energy, the pressure energy makes it easier for the suspension to enter the outlet.

[0021] Furthermore, the distance between the rotation axis of the impeller assembly and the liquid outlet is the second distance, and the distance between the center of the arc plate and the liquid outlet is the third distance. The second distance is greater than the third distance, so that the impeller assembly is eccentrically set relative to the housing.

[0022] Based on the above embodiments, since the second distance is greater than the third distance, that is, the impeller assembly is eccentrically set compared to the shell, the suspension continuously accelerates and accumulates kinetic energy during rotation under the action of centrifugal force. When the suspension touches the straight plate, the suspension can convert kinetic energy into more pressure potential energy, which is more conducive to the suspension entering the filter assembly through the outlet, so as to better realize the circulation process in the storage chamber and the filter assembly.

[0023] Furthermore, the straight plate has a central axis that is perpendicular to the straight plate and intersects perpendicularly with the rotation axis of the impeller assembly.

[0024] Based on the above embodiments, the central axis of the impeller assembly is perpendicular to the base plate and is located on the central axis of the straight plate. The central axis divides the liquid storage chamber into two receiving spaces with the same volume, thereby making the suspension have the same pressure at symmetrical positions on both sides of the central axis.

[0025] Furthermore, the outlet and return port are located on opposite sides of the central axis, and the orthographic projection of the return port along the central axis onto the straight plate is located inside the straight plate.

[0026] Based on the above embodiments, when the suspension comes into contact with the straight plate, part of the suspension's kinetic energy is converted into pressure potential energy. Under the constraints of inertia and the straight plate, the suspension also has a component velocity that is in the same direction as the impeller assembly's rotation and parallel to the straight plate. When the outlet and return port are located on opposite sides of the central axis, the suspension can more easily flow from the outlet to the return port under the influence of the component velocity. The orthographic projection of the return port along the central axis onto the straight plate is located within the straight plate. Therefore, the flow velocity of the suspension at the return port can be controlled by controlling the rotational speed of the impeller assembly, and further, the circulation speed of the suspension can be controlled by controlling the rotational speed of the impeller assembly.

[0027] Furthermore, the flow guide includes an outlet pipe, a return pipe, and a receiving pipe. The outlet pipe is connected to the housing and communicates with the outlet; the return pipe is connected to the housing and communicates with the return port; the receiving pipe is connected to and communicates with both the outlet pipe and the return pipe, and a filter is installed inside the receiving pipe. The outlet pipe and the receiving pipe are detachably connected, and / or the return pipe and the receiving pipe are detachably connected.

[0028] Based on the above embodiments, the outlet pipe, return pipe, and container pipe together form a flow channel to enable the suspension to circulate. The container pipe is detachably connected to at least one of the outlet pipe and return pipe, allowing for timely replacement of the filter element within the container pipe by disassembling it, thereby maintaining the filter element's filtration and adsorption effect on the suspension.

[0029] Furthermore, the end of the outlet pipe connected to the shell is higher than the end of the outlet pipe connected to the receiving pipe, and / or the end of the receiving pipe connected to the outlet pipe is higher than the end of the receiving pipe connected to the return pipe.

[0030] Based on the above embodiments, the end of the outlet pipe connected to the shell is higher than the end of the outlet pipe connected to the container pipe. That is, the gravitational potential energy of the suspension at the end of the outlet pipe connected to the shell is greater than that at the end of the outlet pipe connected to the container pipe. During the movement of the suspension in the outlet pipe, gravity always does positive work, making it easier for the suspension to flow from the end of the outlet pipe connected to the shell to the end of the outlet pipe connected to the container pipe. The end of the container pipe connected to the outlet pipe is higher than the end of the container pipe connected to the return pipe. That is, the gravitational potential energy of the suspension at the end of the container pipe connected to the outlet pipe is greater than that at the end of the container pipe connected to the return pipe. During the movement of the suspension in the container pipe, gravity always does positive work, making it easier for the suspension to flow from the end of the container pipe connected to the outlet pipe to the end of the container pipe connected to the return pipe, thereby allowing the suspension to pass through the filter element more smoothly.

[0031] Furthermore, the purification device also includes a sterilization component, which is disposed within the housing or liquid storage chamber.

[0032] Based on the above embodiments, the disinfection component sterilizes and disinfects the suspension.

[0033] Furthermore, the disinfection component includes one or more ultraviolet lamps disposed in the housing for emitting ultraviolet light into the liquid storage chamber.

[0034] Based on the above embodiments, the ultraviolet light emitted by the ultraviolet lamp can irradiate the suspension, thereby achieving the purpose of sterilizing and disinfecting the suspension.

[0035] This application provides a purification device by creating a liquid storage chamber inside the housing and installing a rotatable impeller assembly within the chamber. When the liquid storage chamber contains a suspension, the impeller assembly rotates, causing the suspension to rotate within the chamber under centrifugal force, thereby reducing the interaction forces between particles in the suspension. Furthermore, a filter assembly is installed that connects to the liquid storage chamber via an outlet and a return outlet, enabling the suspension to circulate between the liquid storage chamber and the filter assembly. This further reduces the interaction forces between particles in the suspension, thereby accelerating the deposition of solid particles in the suspension under the combined action of gravity and centrifugal force.

[0036] Secondly, this application provides a cleaning robot, including the purification device and robot body as described in any of the above embodiments. The robot body has a placement space, and the housing of the purification device is disposed in the placement space. The robot body also includes a suspension collection device, which includes an injection channel that communicates with the storage chamber of the purification device.

[0037] Based on the above embodiments, the robot body has a suspension collection device that can collect dirt, water stains and other suspensions on the ground. The collected dirt and water stains flow into the storage chamber through the injection channel. The suspension is accelerated to settle in the storage chamber to better achieve the filtration effect of the suspension, thereby reducing the growth of bacteria in the suspension. This allows the cleaning robot to collect the suspension and also to perform stratification of the suspension.

[0038] Thirdly, embodiments of this application provide a clean base station, including a purification device, a driving component, and a base as described in any of the above embodiments. The driving component is connected to the impeller assembly of the purification device, and the housing of the purification device and the driving component are fixedly disposed on the base.

[0039] Based on the above embodiments, the moving part is connected to the impeller assembly via a transmission to drive the impeller assembly to rotate within the liquid storage chamber, thereby causing the suspension within the liquid storage chamber to rotate and accelerate the deposition of solid particles in the suspension. The cleaning base station in this embodiment can achieve stratified treatment of the suspension, reducing bacterial growth in the suspension.

[0040] Fourthly, embodiments of this application provide a cleaning system, including a cleaning base station and a cleaning robot that cooperates with the cleaning base station. At least one of the cleaning base station and the cleaning robot includes the purification device in any of the above embodiments.

[0041] Based on the above embodiments, when the cleaning robot includes a purification device, the cleaning robot can complete the separation of the suspension before returning to the cleaning base station. The cleaning robot can deliver the filter layer and the sediment layer in the suspension to the cleaning base station respectively, so that the cleaning base station can perform sterilization and disinfection operations on the filter layer and the sediment layer respectively, thereby obtaining a better sterilization effect; or, when the cleaning base station includes a purification device, after the cleaning robot completes the cleaning work on the ground, the cleaning robot delivers the collected suspension to the cleaning base station, and the cleaning base station completes the separation process of the suspension to reduce the growth of bacteria in the suspension. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a cross-sectional view of the purification device in one embodiment of this application;

[0044] Figure 2 This is a cross-sectional view of the purification device in another embodiment of this application;

[0045] Figure 3 This is a schematic diagram of the purification device in another embodiment of this application;

[0046] Figure 4 This is a schematic diagram of the purification device in another embodiment of this application;

[0047] Figure 5 This is a cross-sectional view of the purification device in another embodiment of this application;

[0048] Figure 6 This is a schematic diagram showing the flow direction of liquid in a purification device according to one embodiment of this application;

[0049] Figure 7 This is a cross-sectional structural schematic diagram of the purification device in another embodiment of this application;

[0050] Figure 8 This is a cross-sectional view of the purification device in another embodiment of this application;

[0051] Figure 9 This is a schematic diagram of the purification device in one embodiment of this application;

[0052] Figure 10This is a schematic diagram of the structure of a cleaning robot in one embodiment of this application;

[0053] Figure 11 This is a schematic diagram of the cleaning system in one embodiment of this application.

[0054] Reference numerals: 1. Purification device; 2. Shell; 21. Liquid storage chamber; 22. Liquid outlet; 23. Liquid return port; 24. Base plate; 25. Side plate; 251. Arc-shaped plate; 252. Straight plate; 3. Filter assembly; 31. Flow guide; 311. Liquid outlet pipe; 312. Liquid return pipe; 313. Receptacle pipe; 32. Filter element; 4. Impeller assembly; 41. Central shaft; 42. Blade; 5. Disinfection component; 51. Ultraviolet lamp tube; 6. Cleaning robot; 61. Robot body; 611. Suspension collection device; 612. Placement space; 613. Liquid injection channel; 7. Cleaning base station; 71. Drive component; 72. Base; 8. Cleaning system; L1. First distance; L2. Second distance; L3. Third distance; L4. Central axis; S. Acceleration space; X. Intersection position. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0056] In related technologies, wastewater refers to a complex mixture of various forms of inorganic and organic matter, typically including floating and / or suspended solid particles of different sizes, colloidal or gel-like diffusers, and pure solutions. From a macroscopic perspective, wastewater is a form of suspension. Suspensions contain some larger particles, which, due to surface tension, are distributed in a suspended or floating state. Similarly, suspensions also contain some smaller particles, which may be subject to intermolecular forces, steric hindrance forces, and electrostatic forces. Under the interaction of these forces, smaller particles continuously undergo agglomeration and deagglomeration processes, thus maintaining the suspension in a stable state. The stable state of a suspension is characterized by a three-dimensional network structure formed by the particles in the dispersion medium, which macroscopically exhibits flocculation characteristics. Flocculation characteristics may reduce the visibility and transparency of the suspension, increase its viscosity, making it easier for bacteria to aggregate and proliferate, and also affecting the sterilization effect of sterilization devices.

[0057] Please refer to Figure 1This application provides a purification device 1 for accelerating the deposition of solid particles in a suspension. The purification device 1 includes a housing 2, a filter assembly 3, and an impeller assembly 4. The housing 2 has a storage chamber 21 for containing a liquid, such as a suspension. By rotating the impeller assembly 4 within the storage chamber 21, the suspension in the storage chamber 21 is subjected to centrifugal force applied by the impeller assembly 4. Under the action of this centrifugal force, the suspension rotates within the storage chamber 21 and forms a rotating water ring. That is, the impeller assembly 4 drives the suspension to circulate between the storage chamber 21 and the filter assembly 3. Both the rotation and circulation of the suspension can disrupt the forces between particles in the suspension. Under the combined action of centrifugal force and gravity, the solid particles in the suspension can be deposited more quickly to the bottom of the storage chamber 21. The deposited suspension can be divided into a filter layer and a sedimentation layer, with the filter layer located above the sedimentation layer. The sedimentation layer and the filter layer represent the deposition of solid particles in the suspension. From a macroscopic perspective, the filter layer has higher transparency and visibility than the deposition layer, and there is a relatively clear boundary between the filter layer and the deposition layer. It is understood that the purification device of this application can treat not only suspensions but also other liquids such as emulsions.

[0058] The housing 2 has a storage chamber 21 for containing the suspension. The storage chamber 21 not only contains the suspension but also prevents the suspension from being affected by the external environment during deposition. For example, when the impeller assembly 4 rotates, the housing 2 can be in a sealed state to isolate the suspension in the storage chamber 21 from contact with the external environment. This not only prevents the suspension from splashing outside the storage chamber 21 during rotation and contaminating the external environment but also prevents the exchange of substances between pollutants in the external environment and the suspension, thus reducing the difficulty of purifying the suspension. Understandably, the material used for the housing 2 is related to the characteristics of the suspension and the application scenario. The housing 2 can be made of plastic, which has good corrosion resistance and reduces manufacturing costs; or it can be made of metal, making it less likely for solid particles in the suspension to be adsorbed on the inner wall, thus facilitating the deposition of solid particles. Furthermore, to more intuitively observe the changes in the suspension within the storage chamber 21, the housing 2 can be partially or entirely transparent, facilitating observation of the suspension's state for subsequent processing steps.

[0059] The shell 2 also has an outlet 22 and a return port 23, both of which are connected to the storage chamber 21, thereby enabling the flow or circulation of the suspension. It is understood that when at least one of the return port 23 and the outlet 22 is connected to the external environment, the suspension can flow to the external environment through at least one of the return port 23 and the outlet 22. For example, after the suspension has deposited and stratified in the shell 2, the deposited layer and the filter layer can be discharged from the storage chamber 21 through the return port 23 and the outlet 22, respectively. When the return port 23 and the outlet 22 are connected, the suspension can circulate within the storage chamber 21 through the return port 23 and the outlet 22.

[0060] The filter assembly 3 is located outside the housing 2 and can filter and block solid particles in the suspension. The filter assembly 3 connects the outlet 22 and the return port 23, that is, the filter assembly 3 forms a channel outside the housing 2 that connects to the storage chamber 21. When the impeller assembly 4 rotates in the storage chamber 21, it applies centrifugal force to the suspension in the storage chamber 21. Under the action of centrifugal force, the suspension collides with the inner wall of the housing 2, forming a rotating water ring between the inner wall of the housing 2 and the impeller assembly 4. When the rotating water ring passes through the outlet 22, since part of the inner wall of the housing 2 is missing at the outlet 22, the suspension flows into the outlet 22 and enters the filter assembly 3 under the action of centrifugal force. After being filtered by the filter assembly 3, the suspension finally flows back to the storage chamber 21 through the return port 23, thereby enabling the suspension to circulate when the filter assembly 3 connects to the storage chamber 21. The circulation process promotes the migration of particles in the suspension and accelerates the sedimentation of solid particles. At the same time, the circulation process can also promote the movement of matter and the exchange of energy. That is, the circulation of the suspension can also reduce the intermolecular forces between particles, increase the difficulty of aggregation between smaller particles, and thus reduce the flocculation characteristics of the suspension. From a macroscopic perspective, the circulation process can increase the visibility and transparency of the suspension and accelerate the deposition of particles in the suspension.

[0061] Furthermore, the filter assembly 3 should be sealed to the housing 2 to prevent leakage of the suspension. The filter assembly 3 and the housing 2 can be sealed by means of screwing, gluing, welding, snap-fitting, etc., and there are no restrictions on this.

[0062] Please continue to refer to Figure 1 The filter assembly 3 includes a flow guide 31 and a filter element 32. The filter element 32 can filter and block some of the larger particles in the suspension, so that the filter assembly 3 can achieve the effect of filtration while realizing the circulation of the suspension, and accelerate the deposition of particles in the suspension.

[0063] The flow guide 31 has a flow channel and is connected to the housing 2. Furthermore, since the flow channel connects the outlet 22 and the return port 23, and there is a significant pressure difference between the outlet 22 and the return port 23, to prevent leakage of the suspension at these locations, the flow guide 31 should be sealed to the housing 2. This sealing connection includes, but is not limited to, adhesive bonding, screwing, snap-fitting, and welding. Moreover, to adapt to different working environments and meet the needs of various conditions, the material of the flow guide 31 can also be selected from materials such as metal, plastic, or plastic-coated metal.

[0064] The filter element 32 is disposed within the flow channel to filter and adsorb larger impurities in the suspension, such as paper, hair, and dust. The filter element 32 selectively filters only the components within the suspension. Furthermore, the filtration radius of the filter element 32 can be limited so that particles larger than the filtration radius in the suspension are filtered and adsorbed by the filter element 32 as they pass through, thus achieving targeted filtration of the suspension. Moreover, due to the existence of intermolecular forces, steric hindrance forces, and electrostatic forces between particles in the suspension, aggregation of different particles may occur. When particles that happen to meet the filtration radius aggregate with other particles, the diameter of the aggregated particles may be larger than the filtration radius of the filter element 32. This causes particles that would otherwise pass through the filter element 32 to become unable to pass through after aggregation. When the impeller assembly 4 rotates, the centrifugal force generated by the rotation of the impeller assembly 4 can separate substances with different sedimentation coefficients and buoyancy densities in the suspension. That is, the centrifugal force generated by the rotation of the impeller assembly 4 can separate agglomerated particles, so that particles that just meet the filtration radius can pass smoothly through the filter element 32, thereby achieving selective filtration of the suspension and further accelerating the deposition of particles in the suspension.

[0065] Impeller assembly 4, as the driving component of purification device 1, is one of the important components for accelerating the settling velocity of solid particles in the suspension. Impellers can be classified into centrifugal impellers and forward impellers according to their shape. Centrifugal impellers have blade shapes such as single-plate, arc-shaped, and airfoil-shaped, while forward impellers generally have arc-shaped blades. Due to the intermolecular forces between particles in the suspension, different particles aggregate and combine with each other. This aggregation includes both the combination of different solid particles and the combination of solid particles and liquid particles, ultimately forming a colloidal or semi-colloidal state in the solution, which exhibits flocculation characteristics on a macroscopic scale. Furthermore, because different particles are of different types, their settling coefficients and buoyant densities are also different. The centrifugal force generated by the rotation of impeller assembly 4 acts on the particles, causing substances with different settling coefficients and buoyant densities to separate in the suspension. Furthermore, under the influence of gravity, the particulate matter in the suspension continuously settles within the storage chamber 21, and this settling is accompanied by diffusion. The smaller the relative mass of the particulate matter, the more severe the diffusion and the slower the settling speed. When the centrifugal force generated by the rotation of the impeller assembly 4 acts on the particulate matter, the centrifugal force can help the particulate matter overcome or reduce the diffusion and accelerate the settling speed of the particulate matter within the storage chamber 21.

[0066] In summary, by opening a liquid storage chamber 21 inside the shell 2 and installing a rotatable impeller assembly 4 inside the liquid storage chamber 21, when the liquid storage chamber 21 contains liquid such as a suspension, the impeller assembly 4 rotates to make the suspension rotate within the liquid storage chamber 21 under the action of centrifugal force, thereby reducing the interaction force between particles in the suspension. By setting a filter assembly 3 to connect the liquid storage chamber 21 through the liquid outlet 22 and the liquid return port 23, the suspension can achieve a circulation process between the liquid storage chamber 21 and the filter assembly 3. During the circulation process, the filter assembly 3 filters and adsorbs larger particles in the suspension, further reducing the interaction force between particles in the suspension, thereby accelerating the deposition of solid particles in the suspension under the combined action of gravity and centrifugal force.

[0067] Please refer to Figures 2 to 3 The impeller assembly 4 includes a central shaft 41 and a plurality of blades 42, the plurality of blades 42 being connected to the central shaft 41, and each blade 42 having a free end away from the central shaft 41 (e.g., Figure 2 The distance between the free end (represented by A, B, C, and D in the diagram) and the inner wall of the housing 2 along the length extension direction of the blade 42 is the first distance L1 (e.g., ...). Figure 2 In L1), multiple free ends form an acceleration space S with the inner wall of the shell 2 (e.g., L1). Figure 2In the acceleration space S), when the impeller assembly 4 rotates, the same blade 42 passes through the acceleration space S, the outlet 22 and the return port 23 in sequence. In order to make it easier for the suspension to enter the outlet 22 to achieve circulation, in the acceleration space S, along the rotation direction of the impeller assembly 4, the first distance L1 corresponding to different free ends gradually increases.

[0068] Furthermore, the flow and circulation of the suspension within the storage chamber 21 follow Bernoulli's principle, and Bernoulli's equation can be expressed as:

[0069]

[0070] In the formula:

[0071] p: Pressure at point a in the fluid, where point a can be any point in the fluid;

[0072] ν: The velocity at point a in the fluid;

[0073] ρ: fluid density;

[0074] g: acceleration due to gravity;

[0075] h: The height of point a in the fluid.

[0076] Bernoulli's principle follows the law of conservation of mechanical energy, which states that the sum of pressure potential energy, kinetic energy, and gravitational potential energy is a constant. In this embodiment, suspensions with the same liquid level can be approximated as having the same gravitational potential energy. That is, suspensions at different positions within the same liquid level have the same gravitational potential energy. In other words, suspensions with the same liquid level can exhibit the conversion between kinetic and pressure potential energy through their different positions.

[0077] For example, such as Figure 2The four free ends A, B, C, and D shown represent the flow velocities of the suspension at those points. Since points A, B, C, and D are at the same liquid level, they can be approximated as having the same gravitational potential energy. Furthermore, according to the pressure formula: P = F / S, where pressure is the ratio of the pressure exerted on an object to the area of ​​contact, the pressure on the suspension originates from the centrifugal force generated by the rotation of the impeller assembly 4. The direction of this centrifugal force is along the length of the blade 42, extending from the free end of the blade 42 away from the central axis 41 towards the housing 2. Since the impeller assembly 4 acts as the driving component within the liquid storage chamber 21, its rotation applies centrifugal force to the suspension. Regardless of the impeller assembly 4's rotational speed, the centrifugal force applied to the suspension at any given moment is the same, meaning the pressure on points A, B, C, and D is the same. The area of ​​contact of the suspension can be approximated as the distance between points A, B, C, and D and the housing 2 along the length of the blade 42. Since the distances between points A, B, C, and D and the shell 2 gradually increase along the length extension direction of blade 42, it can be deduced that the pressure of the suspension at points A, B, C, and D gradually decreases. Furthermore, for suspensions with the same liquid level, the pressure at their location along the length extension direction of blade 42 is related to the distance between the suspension and the shell 2; the farther the distance between point a in the suspension and the shell 2 along the length extension direction of blade 42, the lower the pressure of the suspension at that point. Since p D <p C <p B <p A Combining the Bernoulli equation described above, a simple derivation can lead to: ν A <ν B <ν C <ν D The kinetic energy of the suspension gradually increases at points A, B, C, and D. Furthermore, it can be concluded that for suspensions with the same liquid level, the velocity at the location of the blade 42 along its length is related to the distance between the free end of the blade 42 and the shell 2. The greater the distance between the free end of the blade 42 and the inner wall of the shell 2, the greater the velocity of the suspension at that free end. Therefore, along the rotation direction of the impeller assembly 4, as the first distance L1 corresponding to different free ends gradually increases, multiple different free ends form an acceleration space S with the inner wall of the shell 2. Within the acceleration space S, along the rotation direction of the impeller assembly 4, the kinetic energy of the suspension continuously increases.

[0078] Because the same blade 42 passes through the acceleration space S and the outlet 22 sequentially, the suspension at the outlet 22 has greater kinetic energy than before acceleration. When the suspension is at the outlet 22, since there is no inner wall of the shell 2 at the outlet 22, the suspension enters the outlet 22 due to its own kinetic energy. Furthermore, because the same blade 42 passes through the outlet 22 and the return outlet 23 sequentially, the suspension enters the filter assembly 3 through the outlet 22 and then flows into the storage chamber 21 through the return outlet 23, thus forming a circulation between the storage chamber 21 and the filter assembly 3. In summary, the acceleration space S allows the suspension to have greater kinetic energy when entering the outlet 22, thus allowing it to flow more smoothly into the storage chamber 21 through the return outlet 23. This makes the circulation process of the suspension between the storage chamber 21 and the filter assembly 3 more convenient and faster, thereby accelerating the deposition of solid particles in the suspension.

[0079] The above physical analysis only applies to suspensions with the same liquid level, i.e., a physical analysis is performed on a liquid level of a specific height. The results obtained can be applied to liquid levels of other heights through analogy and inductive reasoning. Therefore, this embodiment does not impose specific restrictions on the height of the outlet 22 and the return outlet 23.

[0080] like Figure 2 As shown, when each blade 42 in the impeller assembly 4 has the same length, the distance between the free end and the central axis 41 is the same, and they are evenly distributed along the circumference of the central axis 41, the impeller assembly 4 is centrally symmetrical about the central axis 41. The area of ​​the fan-shaped region swept by each blade 42 in the same time is the same. In order to make the first distance L1 corresponding to different free ends gradually increase along the rotation direction of the impeller assembly 4 in the acceleration space S, the impeller assembly 4 is eccentrically set relative to the housing 2. When the structure of the housing 2 is a centrally symmetrical structure such as a cylinder, cuboid, cone, or sphere, the central axis 41 of the impeller assembly 4 is eccentrically set relative to the axis of symmetry of the liquid storage cavity 21. That is, the axis of rotation of the impeller assembly 4 does not coincide with the axis of symmetry of the liquid storage cavity 21. When the impeller assembly 4 rotates around the central axis 41, there is an eccentricity between the impeller assembly 4 and the axis of symmetry of the liquid storage cavity 21 during the rotation process. In the direction of rotation of the impeller assembly 4, within the acceleration space S, the existence of the eccentricity causes the free end of the blade 42 to be in contact with the inner wall of the housing 2. The distance between them gradually increases; when the structure of the liquid storage chamber 21 is a non-axisymmetric structure, the rotation axis of the impeller assembly 4 is eccentrically set relative to the center of the arc plate 252, so that some blades 42 of the impeller assembly 4 form an acceleration space S with the inner wall of the shell 2. Thus, in the rotation direction of the impeller assembly 4, the first distance L1 corresponding to different free ends in the acceleration space S gradually increases, so that the kinetic energy of the suspension in the acceleration space S continuously increases, that is, the speed of the suspension in the acceleration space S continuously increases.

[0081] like Figure 3 As shown, when the impeller assembly 4 contains blades 42 of different lengths, different distances between their free ends and the central shaft 41, and are uniformly distributed circumferentially along the central shaft 41, the area of ​​the fan-shaped region swept by each blade 42 in the same time period is different. That is, when the impeller assembly 4 rotates around the central shaft 41, the torque of each blade 42 relative to the central shaft 41 is different, and the sum of the torques between the central shaft 41 and each free end during rotation is not zero. The impeller assembly 4 has an eccentricity during rotation. Furthermore, when the impeller assembly 4 rotates, the length of the blade 42 currently passing through the outlet 22 is greater than the length of the next blade 42 that will pass through the outlet 22. When the structure of the shell 2 is axisymmetric, such as a cylinder, cube, cone, or sphere, the central axis 41 of the impeller assembly 4 can coincide with the axis of symmetry of the liquid storage chamber 21 (that is, the impeller assembly 4 can be centrally located inside the shell 2). This allows some of the blades 42 of the impeller assembly 4 to form an acceleration space S between themselves and the inner wall of the shell 2. In the direction of rotation of the impeller assembly 4, the first distance L1 corresponding to different free ends gradually increases in the acceleration space S, causing the kinetic energy of the suspension to continuously increase in the acceleration space S, that is, causing the speed of the suspension to continuously increase in the acceleration space S.

[0082] like Figure 2 As shown, within the acceleration space S, the inner wall of the shell 2 and the wall of the outlet 22 intersect at a position X. Along the length extension direction of the blade 42, the first distance L1 corresponding to the free end pointing to the intersection position is greater than the first distance L1 corresponding to the other free ends. That is, the outlet 22 is located at the end of the acceleration space S, so that the suspension has greater kinetic energy at the outlet 22, which is more conducive to realizing the circulation process of the suspension between the storage chamber 21 and the filter assembly 3.

[0083] Please refer to Figure 4 The flow area of ​​outlet 22 is larger than that of return outlet 23. It is understandable that the continuity of the fluid indicates that, within the same time period, the flow rate of the suspension flowing into outlet 22 is the same as the flow rate of the suspension flowing out of return outlet 23. According to the flow rate formula: Q = S * ν, since the flow area of ​​outlet 22 is larger than that of return outlet 23, the flow velocity of the suspension at return outlet 23 is greater than that at outlet 22. This further improves the circulation efficiency of the suspension in the filter assembly 3. In other words, when the flow velocity of the suspension flowing into outlet 22 or out of return outlet 23 increases, the suspension can circulate more times in the filter assembly 3 within the same time period, thereby accelerating the deposition of solid particles in the suspension.

[0084] Please continue to refer to this. Figure 4The housing 2 includes a bottom plate 24 and a side plate 25, which together form a liquid storage cavity 21. It is understood that the central shaft 41 of the impeller assembly 4 can be perpendicular to the bottom plate 24. Furthermore, the central shaft 41 of the impeller assembly 4 can be fixedly connected to the bottom plate 24, meaning the drive device of the impeller assembly 4 is located inside the central shaft 41, driving the rotation of the blades 42; or the central shaft 41 of the impeller assembly 4 can be sealed to the bottom plate 24, meaning the central shaft 41 passes through the bottom plate 24, and the drive device is located outside the housing 2, connected to the central shaft 41, thereby driving the rotation of the blades 42.

[0085] Furthermore, the outlet 22 can be located on the base plate 24 or the side plate 25, and the return port 23 can also be located on the base plate 24 or the side plate 25. That is, there are four possible arrangements for the outlet 22 and the return port 23: 1. Both the outlet 22 and the return port 23 are located on the base plate 24; 2. Both the outlet 22 and the return port 23 are located on the side plate 25; 3. The outlet 22 is located on the side plate 25, and the return port 23 is located on the base plate 24; 4. The outlet 22 is located on the base plate 24, and the return port 23 is located on the side plate 25. Based on these four scenarios, it is understandable that the location of the outlet 22 and the return port 23 will affect the circulation process of the suspension between the storage chamber 21 and the filter assembly 3.

[0086] Furthermore, such as Figure 4 As shown, the return port 23 is located on the bottom plate 24, and the outlet 22 is located on the side plate 25. The distance between the outlet 22 and the bottom plate 24 is greater than the distance between the return port 23 and the bottom plate 24. This means the gravitational potential energy of the suspension at the outlet 22 is greater than that at the return port 23. The suspension enters the filter assembly 3 through the outlet 22 and then flows back to the storage chamber 21 through the return port 23. During the flow of the suspension within the filter assembly 3, the gravitational potential energy is converted into kinetic energy, and gravity does positive work during the flow, thus facilitating the circulation of the suspension between the storage chamber 21 and the filter assembly 3.

[0087] Please continue reading. Figure 4When the return port 23 is located on the bottom plate 24, the suspension in the filter assembly 3 flows into the storage chamber 21 through the return port 23. Since the impeller assembly 4 is located above the return port 23, the flow velocity of the suspension in the storage chamber 21 is greater than that of the suspension in the filter assembly 3 at the return port 23. According to Bernoulli's principle, at the same height, the pressure is lower where the flow velocity is higher. Therefore, at the return port 23, the pressure of the suspension in the filter assembly 3 is greater than that of the suspension in the storage chamber 21. A pressure difference is formed at the return port 23. The pressure difference gives the suspension pressure to flow from the filter assembly 3 into the storage chamber 21, which makes it easier to realize the circulation process of the suspension between the storage chamber 21 and the filter assembly 3. It is understandable that the pressure difference formed at the return port 23 is related to the flow rate of the suspension in the storage chamber 21 at the return port 23. Since the rotation of the impeller assembly 4 drives the suspension to rotate in the storage chamber 21, the pressure difference formed at the return port 23 is related to the rotation speed of the impeller assembly 4. That is, the faster the rotation speed of the impeller assembly 4, the greater the flow rate of the suspension in the storage chamber 21 at the return port 23, the greater the pressure difference formed at the return port 23, and the easier it is for the suspension to flow into the storage chamber 21 from the rotating assembly. Furthermore, the projection of the impeller assembly 4 along its own axis onto the base plate 24 covers at least 1 / 3 of the opening area of ​​the return port 23. On the one hand, this can increase the flow velocity of the suspension at the return port 23, thereby accelerating the circulation efficiency of the suspension between the storage chamber 21 and the filter assembly 3. On the other hand, it can also more accurately control the flow velocity of the suspension in the storage chamber 21 at the return port 23, thus controlling the circulation speed of the suspension between the storage chamber 21 and the filter assembly 3 by controlling the rotation speed of the impeller assembly 4.

[0088] like Figure 5As shown, both the outlet 22 and the return port 23 can be located on the side plate 25. To allow the suspension to circulate better between the storage chamber 21 and the filter assembly 3, the outlet 22 can be higher than the return port 23. That is, the height of the outlet 22 from the bottom plate 24 is greater than the height of the return port 23 from the bottom plate 24. Furthermore, the gravitational potential energy of the suspension at the outlet 22 is greater than that at the return port 23. During the process of the suspension flowing from the outlet 22 into the filter assembly 3 to the return port 23, gravity does positive work on the movement of the suspension, making it easier for the suspension to circulate within the filter assembly under the action of gravity. The flow from the outlet 22 to the return port 23 within component 3 is further improved. In the direction of rotation of impeller assembly 4, the suspension passes through outlet 22 and return port 23 in succession. When the suspension enters filter assembly 3 through outlet 22, the suspension at outlet 22 has not only a velocity component along the flow of filter assembly 3, but also a velocity component along the rotation direction of impeller assembly 4. By making the suspension pass through outlet 22 and return port 23 in the rotation direction of impeller assembly 4 in succession, the suspension in filter assembly 3 is made easier to flow, thereby making the circulation of suspension between storage chamber 21 and filter assembly 3 smoother.

[0089] Furthermore, both the outlet 22 and the return port 23 can be located on the base plate 24, and the projection of the impeller assembly 4 along its own axial direction on the base plate 24 is offset from that of the outlet 22, and covers at least 1 / 3 of the opening area of ​​the return port 23. It is understood that when the impeller assembly 4 covers the return port 23, at the return port 23, the flow velocity of the suspension in the storage chamber 21 is greater than the flow velocity of the suspension in the filter assembly 3. Therefore, the pressure of the suspension at the return port 23 is less than the pressure of the suspension at the outlet 22. Under the action of the pressure difference, the suspension flows into the filter assembly 3 through the outlet 22, and then into the storage chamber 21 through the return port 23.

[0090] Furthermore, a baffle can be installed downstream of the impeller assembly 4 in the direction of rotation at the outlet 22. The impeller assembly 4 passes through the outlet 22 and the baffle in the direction of rotation. The baffle allows the kinetic energy of the suspension to be converted into pressure potential energy when it touches the baffle, thus making it easier to flow into the outlet 22.

[0091] Furthermore, the liquid outlet 22 is located on the bottom plate 24, and the liquid return port 23 is located on the side plate 25. It can be understood that when the impeller assembly 4 reaches a certain speed in the liquid storage chamber 21, the pressure of the suspension at the liquid outlet 22 is greater than the pressure of the suspension at the liquid return port 23. As a result, the suspension flows into the filter assembly 3 through the liquid outlet 22 under the action of the pressure difference, and then flows into the liquid storage chamber 21 through the liquid return port 23.

[0092] Please see Figure 6The side plate 25 includes an arc-shaped plate 251 and a straight plate 252, with a liquid outlet 22 on the straight plate 252. The arc-shaped plate 251, the straight plate 252, and the bottom plate 24 together form a liquid storage cavity 21. Furthermore, the arc-shaped plate 251, the straight plate 252, and the bottom plate 24 are sealed to each other in pairs to prevent the suspended liquid in the enclosed liquid storage cavity 21 from seeping into the external environment. It is understood that the arc-shaped plate and the straight plate 251 and 252 can also be manufactured using an integral molding process, thereby reducing the manufacturing cost of the arc-shaped plate and the straight plate 251 and 252.

[0093] Under the centrifugal force generated by the rotation of the impeller assembly 4, the suspension rotates within the storage chamber 21. When the suspension rotating along the arc plate 251 touches the straight plate 252, since the curvature of the straight plate 252 is smaller than that of the arc plate 251, the straight plate 252 will hinder part of the suspension from continuing to rotate. That is, due to the limitation of the internal space of the storage chamber 21, part of the suspension cannot continue to rotate in the original direction of rotation and will have its original trajectory changed by the straight plate 252. Furthermore, when a portion of the suspension changes its original trajectory due to the restriction of the straight plate 252, the suspension loses some kinetic energy due to impact with the straight plate 252. That is, at the instant the portion of the suspension whose original trajectory has been changed touches the straight plate 252, the kinetic energy of this portion of the suspension decreases, and the reduced kinetic energy is converted into potential energy. The potential energy converted by the suspension acts on the straight plate 252 in the form of pressure energy. Since the straight plate 252 has an outlet 22, when the suspension acts on the straight plate 252 in the form of pressure energy, the pressure energy makes it easier for the suspension to enter the outlet 22. Also, since the filter assembly 3 connects the outlet 22 and the return port 23, the combined action of the straight plate 252 and the arc plate 251 makes it easier for the suspension to circulate between the storage chamber 21 and the filter assembly 3.

[0094] Understandably, the arc shape of the curved plate 251 can be any of a major arc, a semicircle, or a minor arc. Since the curvature of the straight plate 252 itself is zero, the curvature of the curved plate 251 must be greater than that of the straight plate 252. The arc shape of the curved plate 251 does not affect the straight plate 252's ability to restrict the movement trajectory of some suspended liquid within the liquid storage chamber 21. Furthermore, the straight plate 252 can also be an arc-shaped plate structure, but the curvature of the straight plate 252 should be less than that of the curved plate 251.

[0095] like Figure 6 As shown, further, the distance between the rotation axis of the impeller assembly 4 and the outlet 22 is the second distance L2, and the distance between the axis of the arc plate 251 and the outlet 22 is the third distance L3. In order to make it easier for the suspension to enter the outlet 22, the second distance L2 is greater than the third distance L3, so that the impeller assembly 4 is eccentrically set relative to the housing 2.

[0096] like Figure 7 The four adjacent regions E1, E2, E3, and E4 shown are each the area enclosed by the central rotating shaft 41, two adjacent blades 42, and the inner wall of the casing 2. It can be understood that when the impeller assembly 4 rotates within the liquid storage chamber 21, the suspension in each of the four regions E1, E2, E3, and E4 moves within the liquid storage chamber 21 in the direction of rotation of the impeller assembly 4; that is, the suspension in each of the four regions E1, E2, E3, and E4 possesses kinetic energy. Furthermore, since the second distance L2 is greater than the third distance L3, the area in regions E1, E2, and E3 gradually increases. In other words, in the direction of rotation of the impeller assembly 4, the distance between the blades 42 and the inner wall of the casing 2 gradually increases in regions E1, E2, and E3. Based on Bernoulli's law, the kinetic energy of the suspension gradually increases in regions E1, E2, and E3. Since the curvature of the straight plate 252 is smaller than that of the curved plate 251, the area of ​​region E4 gradually decreases in the rotation direction of the impeller assembly 4. That is, in the rotation direction of the impeller assembly 4, the distance between the impeller assembly 4 and the inner wall of the housing 2 in region E4 gradually decreases. Furthermore, the kinetic energy of the suspension gradually decreases in region E4. Moreover, since Bernoulli's principle follows the conservation of mechanical energy, it can be concluded that when the suspension enters region E4, because the straight plate 252 hinders the suspension from rotating in the direction of rotation of the impeller assembly 4, the kinetic energy of the suspension gradually decreases when it enters the region. When the plates 252 come into contact, part of the kinetic energy of the suspension is converted into pressure potential energy, which forces the suspension into the outlet 22. Furthermore, since the second distance L2 is greater than the third distance L3, that is, the impeller assembly 4 is eccentrically set relative to the housing 2, the suspension continuously accelerates and accumulates kinetic energy during rotation under the action of centrifugal force. When the suspension touches the straight plate 252, the suspension can convert kinetic energy into more pressure potential energy, which is more conducive to the suspension entering the filter assembly 3 through the outlet 22, so as to better realize the circulation process in the storage chamber 21 and the filter assembly 3.

[0097] Please continue to refer to Figure 7 The straight plate 252 has a central axis L4, which is perpendicular to the straight plate 252 and intersects perpendicularly with the rotation axis of the impeller assembly 4. That is, the central axis 41 of the impeller assembly 4 is perpendicular to the base plate 24 and is located on the central axis L4 of the straight plate 252. It can be understood that the straight plate 252 can be regarded as the chord of the arc of the arc plate 251, and the central axis L4 of the straight plate 252 is also the axis of symmetry of the arc plate 251. When the central axis 41 of the impeller assembly 4 is located on the central axis L4, the central axis L4 divides the liquid storage chamber 21 into two receiving spaces with the same volume, thereby making the suspension have the same pressure at symmetrical positions on both sides of the central axis L4.

[0098] Furthermore, in the rotation direction of the impeller assembly 4, the impeller assembly 4 passes sequentially through the outlet 22 and the return port 23, with the outlet 22 and the return port 23 located on opposite sides of the central axis L4. It can be understood that when the suspension comes into contact with the straight plate 252, part of the suspension's kinetic energy is converted into pressure potential energy. Under the constraints of inertia and the straight plate 252, the suspension also has a component velocity that is parallel to and in the same direction as the rotation of the impeller assembly 4. When the outlet 22 and the return port 23 are located on opposite sides of the central axis L4, the suspension can more easily flow from the outlet 22 to the return port 23 under the influence of this component velocity. Furthermore, the orthographic projection of the return port 23 along the central axis L4 onto the straight plate 252 is located within the straight plate 252. Therefore, the flow velocity of the suspension at the return port 23 can be controlled by controlling the rotation speed of the impeller assembly 4, and consequently, the circulation speed of the suspension can be controlled by controlling the rotation speed of the impeller assembly 4.

[0099] Please continue to refer to Figure 8 The flow guide 31 includes an outlet pipe 311, a return pipe 312, and a receiving pipe 313. The outlet pipe 311 is connected to the outlet 22, the return pipe 312 is connected to the return port 23, and the receiving pipe 313 is connected to both the outlet pipe 311 and the return pipe 312. Thus, the outlet pipe 311, the return pipe 312, and the receiving pipe 313 together form a flow guide channel to facilitate the circulation of the suspension. The outlet pipe 311 and the return pipe 312 should be sealed to the housing 2 and the receiving pipe 313 to prevent leakage of the suspension during circulation. The receiving pipe 313 is detachably connected to at least one of the outlet pipe 311 and the return pipe 312. This allows for timely replacement of the filter element 32 within the receiving pipe 313 by disassembling it, thereby maintaining the filtration and adsorption effect of the filter element 32 on the suspension.

[0100] Furthermore, to ensure better flow of the suspension within the guiding channel, the end of the outlet pipe 311 connected to the shell 2 is higher than the end of the outlet pipe 311 connected to the receiving pipe 313. That is, the gravitational potential energy of the suspension at the end of the outlet pipe 311 connected to the shell 2 is greater than that at the end of the outlet pipe 311 connected to the receiving pipe 313. Furthermore, after the suspension enters the outlet pipe 311 through the outlet 22, as the suspension moves within the outlet pipe 311, its gravitational potential energy continuously decreases. During the movement of the suspension within the outlet pipe 311, gravity always does positive work, making it easier for the suspension to flow from the end of the outlet pipe 311 connected to the shell 2 to the end of the outlet pipe 311 connected to the receiving pipe 313.

[0101] Similarly, to ensure better flow of the suspension within the container tube 313, the end of the container tube 313 connected to the outlet pipe 311 is higher than the end of the container tube 313 connected to the return pipe 312. That is, the gravitational potential energy of the suspension at the end of the container tube 313 connected to the outlet pipe 311 is greater than the gravitational potential energy at the end of the container tube 313 connected to the return pipe 312. Furthermore, after the suspension enters the container tube 313, as the suspension flows through the container... As the suspension moves within the tube 313, its gravitational potential energy continuously decreases. During the movement of the suspension within the tube 313, gravity always does positive work, making it easier for the suspension to flow from the end of the tube 313 connected to the outlet tube 311 to the end of the tube 313 connected to the return tube 312. This allows the suspension to pass more smoothly through the filter element 32, preventing blockage of the suspension at the filter element 32 when it adsorbs too many large particles.

[0102] Furthermore, the number of outlet pipes 311 and return pipes 312 can be one or more. One outlet pipe 311 can connect to multiple return pipes 312, one return pipe 312 can connect to multiple outlet pipes 311, or multiple outlet pipes 311 can connect to multiple return pipes 312. Furthermore, when multiple outlet pipes 311 or multiple return pipes 312 are provided on the housing 2, the arrangement of the outlet pipes 311 and return pipes 312 can also be diverse. Multiple outlet pipes 311 can be vertically arranged along the height direction of the housing 2, inclined along the height direction of the housing 2, or spaced apart along the rotation direction of the impeller assembly 4 within the acceleration space S.

[0103] like Figure 9 As shown, the purification device 1 also includes a disinfection component 5, which may include one or more ultraviolet lamps 51. The ultraviolet lamps 51 can be installed either inside the liquid storage chamber 21 or on the outer wall of the housing 2. When the ultraviolet lamps 51 are installed inside the liquid storage chamber 21, a protective cover is provided on the outside of the ultraviolet lamps 51 to prevent the suspension from entering the ultraviolet lamps 51 and causing a short circuit. When the ultraviolet lamps 51 are installed on the outer wall of the housing 2, in order to allow the ultraviolet rays emitted by the ultraviolet lamps 51 to irradiate the suspension, part or all of the housing 2 should be transparent, thereby achieving the purpose of sterilizing and disinfecting the suspension.

[0104] Furthermore, the disinfection element 5 can also release gas or solid particles to achieve sterilization of the suspension. This application does not restrict the type or state of the disinfection element 5. However, it is worth noting that when the suspension is subjected to the action of the purification device 1, the solid particles in the suspension deposit to the bottom of the storage chamber 21. After the suspension is stratified to form a filter layer and a sediment layer, the disinfection element 5 is then used to sterilize the filter layer and the sediment layer. The sterilization effect obtained by this method is better than that obtained by directly using the disinfection element 5 for sterilization in a non-stratified suspension with the same solid-liquid volume coefficient.

[0105] Secondly, please refer to Figure 10 This application also provides a cleaning robot 6, including the purification device 1 and robot body 61 as described in any of the above embodiments. The robot body 61 has a placement space 612, and the shell 2 is disposed within the placement space 612 so that the shell can be protected by the placement space 612. It is understood that the cleaning robot 6 can be a mopping robot or other robot with liquid collection function. The robot body 61 has a suspension collection device 611, which can collect dirt, water stains and other suspensions on the ground to achieve the cleaning work of the ground. Further, the suspension collection device 611 includes a liquid injection channel 613, which is connected to the liquid storage chamber 21. That is, the collected dirt, water stains and other suspensions flow into the liquid storage chamber 21 through the liquid injection channel 613. The suspension is accelerated to settle in the liquid storage chamber 21 to better achieve the filtration effect of the suspension, thereby reducing the growth of bacteria in the suspension. This allows the cleaning robot 6 to collect the suspension and also to perform stratification of the suspension.

[0106] Thirdly, please refer to Figure 11 This application embodiment also provides a cleaning base station 7, including the purification device 1, drive component 71, and base 72 as described in any of the above embodiments. It is understood that the drive component 71 is connected to the impeller assembly 4 to drive the impeller assembly 4 to rotate within the liquid storage chamber 21, thereby causing the suspension within the liquid storage chamber 21 to rotate, thus accelerating the deposition of solid particles in the suspension. Both the housing and the drive component 71 are disposed on the base 72, which provides a stable foundation for their installation. The cleaning base station 7 in this embodiment can achieve stratified treatment of the suspension, reducing bacterial growth in the suspension.

[0107] Fourthly, please refer to Figure 11 This application also provides a cleaning system 8, including a cleaning base station 7 and a cleaning robot 6 cooperating with the cleaning base station 7. At least one of the cleaning base station 7 and the cleaning robot 6 includes the purification device 1 described in any of the above embodiments. For example, when the cleaning robot 6 (such as...) Figure 10When the cleaning robot 6 includes the purification device 1, it can complete the separation of the suspension before returning to the cleaning base station 7. The cleaning robot 6 can transport the filter layer and the sediment layer in the suspension to the cleaning base station 7 respectively, so that the cleaning base station 7 can perform sterilization and disinfection operations on the filter layer and the sediment layer respectively, thereby obtaining a better sterilization effect. Alternatively, when the cleaning base station 7 includes the purification device 1, after the cleaning robot 6 completes the cleaning work on the ground, the cleaning robot 6 transports the collected suspension to the cleaning base station 7, and the cleaning base station 7 completes the separation process of the suspension to reduce the growth of bacteria in the suspension.

[0108] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0109] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A purification device, characterized in that, include: The housing has a liquid storage chamber, a liquid outlet, and a liquid return port, wherein the liquid storage chamber is connected to the liquid outlet and the liquid return port; A filtration assembly includes a flow guide and a filter element. The flow guide is disposed outside the housing and connected to the housing. The flow guide has a flow channel that is connected to both the liquid outlet and the liquid return port. The filter element is disposed within the flow channel. An impeller assembly is installed inside the liquid storage chamber to drive the liquid in the liquid storage chamber to flow sequentially through the liquid outlet, the flow guide channel, and the liquid return port and back to the liquid storage chamber, so that the liquid in the liquid storage chamber can circulate between the liquid storage chamber and the flow guide channel; The impeller assembly includes a central shaft and multiple blades. The multiple blades are connected to the central shaft, and each blade has a free end away from the central shaft. The distance between the free end and the inner wall of the housing in the length extension direction of the blade is a first distance. The multiple free ends and the inner wall of the housing form an acceleration space. Along the rotation direction of the impeller assembly, the same blade passes through the acceleration space, the liquid outlet, and the liquid return port in sequence. Within the acceleration space, along the rotation direction of the impeller assembly, the first distance corresponding to different free ends gradually increases.

2. The purification device as described in claim 1, characterized in that, The impeller assembly is eccentrically positioned relative to the housing so that, within the acceleration space, the first distance corresponding to different free ends gradually increases along the rotation direction of the impeller assembly.

3. The purification device as described in claim 1, characterized in that, When the impeller assembly rotates, the length of the blade currently passing the liquid outlet is greater than the length of the next blade that will pass the liquid outlet, so that within the acceleration space, along the rotation direction of the impeller assembly, the first distance corresponding to different free ends gradually increases.

4. The purification device as described in claim 1, characterized in that, Within the acceleration space, the inner wall of the housing and the outlet wall intersect at a point, and the first distance corresponding to the free end pointing to the intersection point along the length extension direction of the blade is greater than the first distance corresponding to the other free ends.

5. The purification device as described in claim 1, characterized in that, The housing includes a bottom plate and a side plate connected to the bottom plate. The side plate and the bottom plate together form the liquid storage cavity. The liquid outlet is opened on the bottom plate or the side plate, and the liquid return port is opened on the bottom plate or the side plate.

6. The purification device as described in claim 5, characterized in that, The return port is located on the base plate, the outlet is located on the side plate, and the projection of the impeller assembly along its own axis onto the base plate covers at least 1 / 3 of the opening area of ​​the return port.

7. The purification device as described in claim 5, characterized in that, Both the liquid outlet and the liquid return port are located on the base plate. The projection of the impeller assembly along its own axis onto the base plate is offset from the liquid outlet and covers at least 1 / 3 of the opening area of ​​the liquid return port.

8. The purification device as described in claim 5, characterized in that, The side plate includes: An arc-shaped plate is connected to the base plate; A straight plate is connected to the curved plate and the bottom plate, and together with the curved plate and the bottom plate, they form the liquid storage cavity. The straight plate has the liquid outlet.

9. The purification device as described in claim 8, characterized in that, The distance between the rotation axis of the impeller assembly and the liquid outlet is the second distance, and the distance between the center of the arc plate and the liquid outlet is the third distance. The second distance is greater than the third distance, so that the impeller assembly is eccentrically positioned relative to the housing.

10. The purification device as described in claim 9, characterized in that, The straight plate has a central axis that is perpendicular to the straight plate and intersects perpendicularly with the rotation axis of the impeller assembly.

11. The purification device as described in claim 10, characterized in that, The liquid outlet and the liquid return port are located on opposite sides of the central axis, and the orthographic projection of the liquid return port along the central axis on the straight plate is located inside the straight plate.

12. The purification device as described in claim 1, characterized in that, The flow guide includes: A liquid outlet pipe is connected to the housing and communicates with the liquid outlet. A return pipe is connected to the housing and communicates with the return port; A receiving tube is connected to both the liquid outlet pipe and the liquid return pipe, and is in communication with both the liquid outlet pipe and the liquid return pipe. The filter element is disposed inside the receiving tube. The outlet pipe is detachably connected to the receiving pipe, and / or the return pipe is detachably connected to the receiving pipe.

13. The purification device as described in claim 12, characterized in that, The end of the outlet pipe connected to the housing is higher than the end of the outlet pipe connected to the receiving pipe, and / or the end of the receiving pipe connected to the outlet pipe is higher than the end of the receiving pipe connected to the return pipe.

14. The purification device according to any one of claims 1-13, characterized in that, Also includes: The disinfection component is disposed within the housing or the liquid storage chamber.

15. The purification device as described in claim 14, characterized in that, The disinfection component includes: One or more ultraviolet lamps are disposed in the housing and are used to emit ultraviolet light into the liquid storage chamber.

16. A cleaning robot, characterized in that, include: The purification device as described in any one of claims 1-15; The robot body has a placement space, and the housing of the purification device is disposed in the placement space. The robot body also includes a suspension collection device, which includes an injection channel that communicates with the storage chamber of the purification device.

17. A clean base station, characterized in that, include: The purification device as described in any one of claims 1-15; The driving component is connected to the impeller assembly of the purification device in a driving transmission. The base, the housing of the purification device, and the drive component are fixedly disposed on the base.

18. A cleaning system, characterized in that, The system includes a cleaning base station and a cleaning robot that works in conjunction with the cleaning base station, wherein at least one of the cleaning base station and the cleaning robot includes a purification device as described in any one of claims 1-15.

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