Filtering device and dishwasher

Abstract

This invention provides a filtration device and a dishwasher, relating to the field of kitchen appliance technology. The filtration device includes a water cup and a filter cartridge assembly. The water cup has a water passage chamber. The filter cartridge assembly is rotatably disposed within the water passage chamber. The outer wall of the filter cartridge assembly has blades, which are configured to drive the filter cartridge assembly to rotate within the water passage chamber under the propulsion of the swirling water flow. This invention provides a filtration device and a dishwasher to solve the technical problem of insufficient self-cleaning ability in filtration devices.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliance technology, and more particularly to a filtration device and a dishwasher. Background Technology

[0002] During the dishwasher's washing process, the water flow carries away the residue washed off the dishes. The filter device intercepts and separates the residue to ensure the cleanliness of the water flow and prevent secondary pollution. It also prevents the residue from being sprayed back onto the dishes by the spray arms and prevents the residue from clogging the spray arm holes, ensuring the stability of water supply and spray.

[0003] Existing filtration devices rely on passive cleaning, which results in insufficient self-cleaning ability. Debris easily accumulates at the filter holes, clogging them, reducing filtration efficiency, and consequently affecting the water supply efficiency of the washing pump.

[0004] Therefore, how to improve the self-cleaning function of the filtration device has become an urgent problem to be solved. Summary of the Invention

[0005] This invention provides a filtration device and a dishwasher to solve the technical problem of insufficient self-cleaning ability in filtration devices.

[0006] To achieve the above objectives, the present invention provides a filtration device, comprising:

[0007] A water cup, wherein the water cup has a water passage cavity;

[0008] A filter cartridge assembly is rotatably disposed within the water passage cavity. The outer wall of the filter cartridge assembly has blades, which are configured to drive the filter cartridge assembly to rotate within the water passage cavity under the propulsion of the vortex water flow within the water passage cavity.

[0009] This invention provides a filtration device in which the outer wall of the filter cartridge assembly has blades. When the swirling water flow in the water passage chamber impacts the blades, it applies torque to the blades. With the thrust of the water flow, the blades drive the filter cartridge assembly to rotate in the water passage chamber, which can scrape off impurities attached to the surface of the filter cartridge assembly, making the filter cartridge assembly less prone to getting dirty and achieving a self-cleaning effect. This reduces the problem of filter cartridge assembly clogging and eliminates the need for frequent disassembly and cleaning of the filter cartridge assembly. It combines dynamic cleaning with static filtration, making it more convenient to use and improving filtration efficiency.

[0010] In one possible implementation, the filter cartridge assembly includes a fine filter cartridge having a fine filtration chamber therein, and the blades are disposed on the outer wall of the fine filter cartridge.

[0011] The plurality of said blades are arranged at intervals along the circumference of the fine filter cartridge; and / or,

[0012] The blades extend along the depth direction of the filter cartridge assembly.

[0013] In one possible implementation, the blade has a root connected to the fine filter cartridge and a free end away from the root, and the blade is curved in an arc shape from the root to the free end.

[0014] In one possible implementation, the outer wall of the fine filter cartridge has a guide groove arranged along the circumference of the fine filter cartridge, and the inner wall of the water cup has a guide protrusion extending into the guide groove to guide the fine filter cartridge to rotate circumferentially.

[0015] In one possible implementation, the water cup includes a main body and an outer expansion portion. The bottom of the main body has a circulation inlet for communication with a washing pump. The outer expansion portion is connected to the top of the main body, and the curvature of the outer expansion portion is less than that of the main body.

[0016] In one possible implementation, the inner wall of the main body is provided with at least two water guide vanes, which are arranged at intervals along the circumference of the main body with the central axis of the main body as the center, so as to guide the water flow in the water passage cavity to form a water flow vortex.

[0017] In one possible implementation, the water guide plate is helical curved, with one end of the water guide plate fixed to the inner wall of the main body, and the other end of the water guide plate facing the central axis of the main body and extending along a helical trajectory.

[0018] In one possible implementation, the filter cartridge assembly further includes a coarse filter cartridge located within the fine filter chamber, the fine filter cartridge having a first fastening portion and the coarse filter cartridge having a second fastening portion, the second fastening portion engaging with the first fastening portion.

[0019] In one possible implementation, the filtering device further includes a filter element with an inner wall that is concave downwards in an arc shape, and a mounting hole is provided in the filter element, with the filter cartridge assembly located within the mounting hole.

[0020] The present invention also provides a dishwasher, including the above-described filtration device.

[0021] The filtration device and dishwasher provided by the present invention, by setting at least two water guide vanes on the inner wall of the main body, make the water flow in the water passage cavity rotate in the circumferential direction and continuously converge to form a stable vortex, thereby improving the water flow disturbance effect and enhancing the water flow scouring ability. The vortex applies torque to the blades, drives the filter cartridge assembly to rotate, and achieves the self-cleaning effect of the filter cartridge assembly.

[0022] The filtration device and dishwasher provided by the present invention have blades on the outer wall of the filter cartridge assembly. The swirling water flow in the water passage cavity applies torque to the blades, causing the blades to rotate and drive the filter cartridge assembly to rotate in the water passage cavity. The water flow washes the surface of the filter plate, causing the residue remaining on the surface of the filter plate to fall off and reducing the clogging rate.

[0023] The filtration device and dishwasher provided by the present invention can improve the self-cleaning effect by rotating the fine filter cylinder and the coarse filter cylinder simultaneously, peeling off the residue attached to the surface, and finally achieving the synergistic effect of multi-stage filtration and self-cleaning.

[0024] In addition to the technical problems solved by the embodiments of the present invention, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by a filtering device and dishwasher provided by the embodiments of the present invention, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific embodiments. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 An exploded view of the filtration device provided in an embodiment of the present invention;

[0027] Figure 2 This is a three-dimensional structural diagram of the filtration device provided in an embodiment of the present invention;

[0028] Figure 3 A cross-sectional view of a filtering device provided in an embodiment of the present invention;

[0029] Figure 4 A three-dimensional structural diagram of the fine filter cylinder and blades of the filtration device provided in an embodiment of the present invention;

[0030] Figure 5 A three-dimensional structural diagram of the water cup of the filtration device provided in an embodiment of the present invention;

[0031] Figure 6 Another three-dimensional structural diagram of the water cup of the filtration device provided in the embodiment of the present invention;

[0032] Figure 7 A three-dimensional structural diagram of the filter element of the filtration device provided in an embodiment of the present invention;

[0033] Figure 8 A cross-sectional view of the filter element of the filtration device provided in an embodiment of the present invention;

[0034] Figure 9 A three-dimensional structural diagram of the inner tub of a dishwasher provided in an embodiment of the present invention;

[0035] Figure 10 This is an exploded view of a partial structure of a dishwasher provided in an embodiment of the present invention.

[0036] Explanation of reference numerals in the attached figures:

[0037] 10-Water cup; 11-Water passage cavity; 12-Main body; 121-Circulating water inlet; 122-Water guide plate; 13-Outer expansion; 14-Guide protrusion; 15-Drain outlet; 16-Water inlet pipe;

[0038] 20 - Filter cartridge assembly; 21 - Fine filter cartridge; 211 - Fine filter chamber; 212 - Guide groove; 213 - First fastening part; 22 - Coarse filter cartridge; 221 - Second fastening part;

[0039] 30-blade;

[0040] 40 - Filter element; 41 - Mounting hole; 42 - Outward flange;

[0041] 50-Inner liner; 51-Washing chamber; 52-Connecting hole; 521-Receding step. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0043] The core cleaning process of a dishwasher is as follows: the wash pump draws filtered wash water, which is then sprayed onto the dishes by rotating spray arms. The filtration system is crucial for a dishwasher. Traditional filtration systems lack a self-cleaning mechanism, requiring users to frequently disassemble and clean them, which affects ease of use.

[0044] This invention provides a filtration device that utilizes the vortex effect of water flow to achieve a self-cleaning function for the filter cartridge assembly, while simultaneously improving filtration efficiency. Furthermore, by setting a water guide plate within the water passage cavity to guide the water flow into a vortex, and combining this with the arc-shaped design of the filter disc, the tangential force generated by the vortex can actively remove residue from the surface of the filter disc.

[0045] The filtration device and dishwasher provided in the embodiments of the present invention are described below with reference to the accompanying drawings.

[0046] refer to Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of the present invention provides a filtration device, including: a water cup 10 and a filter cartridge assembly 20. The water cup 10 has a water passage cavity 11. The filter cartridge assembly 20 is rotatably disposed in the water passage cavity 11. The outer wall of the filter cartridge assembly 20 has blades 30. The blades 30 are configured to drive the filter cartridge assembly 20 to rotate in the water passage cavity 11 under the driving action of the vortex water flow in the water passage cavity 11.

[0047] The present invention provides a filtration device in which the outer wall of the filter cartridge assembly 20 has blades 30. When the vortex water flow in the water passage cavity 11 impacts the blades 30, it applies torque to the blades 30. With the thrust of the water flow, the blades 30 drive the filter cartridge assembly 20 to rotate in the water passage cavity 11, which can scrape off impurities attached to the surface of the filter cartridge assembly 20, making the filter cartridge assembly 20 less prone to getting dirty, achieving a self-cleaning effect of the filter cartridge assembly 20, reducing the problem of clogging of the filter cartridge assembly 20, eliminating the need for frequent disassembly and cleaning of the filter cartridge assembly 20, achieving a combination of dynamic cleaning and static filtration, making it more worry-free to use and improving filtration efficiency.

[0048] The vortex flow refers to the spiral rotation of water around the central axis of the water passage chamber 11. The vortex flow, combined with the rotation of the filter cartridge assembly 20 within the water passage chamber 11, ensures full contact between the water flow and the filter cartridge assembly 20, continuously flushing the inner and outer walls of the filter cartridge assembly 20, washing away fine residue particles stuck in the filter holes, and achieving the effect of dynamic sieving of residue.

[0049] In one possible implementation method, refer to Figure 1 and Figure 4 As shown, the filter cartridge assembly 20 includes a fine filter cartridge 21, which has a fine filter chamber 211 inside. Blades 30 are disposed on the outer wall of the fine filter cartridge 21, and the working surface of the blades 30 that interacts with the vortex water flow is concave.

[0050] The working surface of the blade 30 that interacts with the vortex water flow is concave, that is, the water-facing surface of the blade 30 is concave. This can effectively increase the effective contact area between the vortex water flow and the blade 30, improve the blade's ability to capture the kinetic energy of the vortex water flow, significantly increase the driving force of the vortex water flow on the blade 30, reduce the energy loss of the vortex water flow, ensure that the vortex water flow continuously provides torque to the blade 30, drive the filter cartridge assembly 20 to rotate, thereby extending the duration of the self-cleaning function of the filter cartridge assembly 20 and improving the operational stability and reliability of the filter cartridge assembly 20.

[0051] In one possible implementation, the blade 30 can be integrally formed and connected to the outer wall of the fine filter cartridge 21, or it can be connected to the outer wall of the fine filter cartridge 21 by means of screw connection, snap connection, etc.

[0052] In one possible implementation, multiple blades 30 are arranged at intervals along the periphery of the fine filter cartridge 21. This spaced arrangement design avoids water flow interference between the blades 30 and improves the scouring efficiency of the filter cartridge assembly 20 surface.

[0053] In one possible implementation, the blades 30 extend along the depth direction of the filter cartridge assembly 20, which helps to increase the effective contact area between the blades 30 and the vortex water flow and improve the rotational stability of the filter cartridge assembly 20.

[0054] In one possible implementation, the number of blades 30 can be 2, 3, 4, 5, or 6, etc.

[0055] In one possible implementation, the blade 30 has a root connected to the fine filter cartridge 21 and a free end away from the root, and the blade 30 is curved in an arc shape from the root to the free end.

[0056] The blades 30 are curved in an arc shape, which optimizes the water flow adhesion path, reduces vortex water flow separation, and enables the blades 30 to more efficiently convert the kinetic energy of the water flow into rotational torque, thereby enhancing the rotational stability of the filter cartridge assembly 20. In addition, the arc-shaped structure makes the surface of the blades 30 a smooth and continuous curved surface without stress concentration areas. When the blades 30 are subjected to force, the stress distribution is more uniform, avoiding excessive local stress and improving the structural strength and durability of the blades 30.

[0057] In one possible implementation, the blade 30 can be semi-circular or wavy.

[0058] In one possible implementation method, refer to Figure 4 and Figure 5 As shown, the outer wall of the fine filter cylinder 21 has a guide groove 212, which is arranged along the circumference of the fine filter cylinder 21. The inner wall of the water cup 10 is provided with a guide protrusion 14, which extends into the guide groove 212 to guide the fine filter cylinder 21 to rotate circumferentially.

[0059] In one possible implementation, the number of guide protrusions 14 provided on the inner wall of the water cup 10 can be 2, 3 or 4, etc. The guide protrusions 14 have a certain elasticity, and through the elastic deformation of the guide protrusions 14 themselves, the guide protrusions 14 extend into the guide groove 212.

[0060] In one possible implementation, the guide groove 212 is a structure that is recessed from the outer wall of the fine filter cylinder 21 into the interior of the fine filter cylinder 21. The guide protrusion 14 extends into the guide groove 212, providing circumferential guidance and radial limiting for the fine filter cylinder 21, so that the fine filter cylinder 21 rotates stably along a preset trajectory with its own central axis as the center, avoiding shaking, deviation, and jamming of the fine filter cylinder 21 due to vibration or water flow impact, and ensuring smooth and reliable rotation of the fine filter cylinder 21.

[0061] In one possible implementation method, refer to Figure 5 and Figure 6 As shown, the water cup 10 includes a main body 12 and an outer expansion portion 13. The bottom of the main body 12 has a circulation inlet 121 for connecting to a washing pump. The outer expansion portion 13 is connected to the top of the main body 12, and the curvature of the outer expansion portion 13 is less than that of the main body 12. That is, the outer expansion portion 13 is relatively gentle, while the main body 12 has a greater degree of curvature, making the main body 12 more rounded and arched.

[0062] This structure creates a gradually narrowing channel inside the water cup 10 from top to bottom, locally reducing the cross-sectional area of ​​the water flow channel and increasing the water flow velocity inside the water cup 10. The locally accelerated water flow is more likely to form a stable vortex flow, thereby driving the filter cartridge assembly 20 to rotate stably and improving the self-cleaning efficiency of the filter cartridge assembly 20.

[0063] The circulating water inlet 121 is connected to the washing pump through a pipe. The natural eddy current when the washing pump pumps water creates a vortex water flow in the water passage chamber 11. Without the need to add a motor or complex mechanism, the overall structure is effectively simplified, the number of parts is reduced, and the cost and assembly difficulty are reduced while ensuring working performance.

[0064] In one possible implementation, the main body 12 can be an approximately hemispherical structure with a rounded inner wall without sharp corners, so that the stress distribution is uniform during water flow and stress, which can effectively reduce the resistance of water flow. The top of the main body 12 is open, and the inner wall of the outward expansion 13 is an arc surface.

[0065] In one possible implementation, the bottom end of the outward expansion 13 may be integrally formed and connected to the top end of the main body 12.

[0066] The bottom of the main body 12 also has a drain outlet 15, which is located at the lowest surface of the water cup 10, which is conducive to the strong drainage of water in the water cup 10. The drain outlet 15 is connected to the water passage cavity 11 and is used to connect a drain pipe or a drain valve.

[0067] The filter cartridge assembly 20 filters out residues in the water flow, reducing the amount of residue entering the washing pump, thus reducing wear and tear on the washing pump, extending its service life, and also helping to reduce secondary pollution of tableware caused by residues.

[0068] The side wall of the water cup 10 is also provided with a water inlet pipe 16. One end of the water inlet pipe 16 is connected to the water passage chamber 11, and the other end of the water inlet pipe 16 is connected to a tap water pipe or a water tank. When the dishwasher is working, water is supplied to the water passage chamber 11 through the water inlet pipe 16. The water flow into the water passage chamber 11 is transported to the spray arm by the suction of the washing pump, and then sprayed out from the spray holes on the surface of the spray arm to clean the dishes. The water flow washes away the residue attached to the surface of the dishes and flows down into the water passage chamber 11. The residue is filtered by the filter cartridge assembly 20. The filtered water flow is circulated to the spray arm. Finally, after the washing is finished, the drain valve is opened, and the water flow is transported to the drain pipe from the drain outlet 15 under the action of the drain pump.

[0069] In one possible implementation method, refer to Figure 5 and Figure 6 As shown, the inner wall of the main body 12 is provided with at least two water guide plates 122. The at least two water guide plates 122 are arranged at intervals along the circumference of the main body 12 with the central axis of the main body 12 as the center, so as to guide the water flow in the water cavity 11 to form a vortex water flow.

[0070] When the water flows through the guide vane 122, it is guided in an orderly manner. Under the guidance of the guide vane 122, it cannot flow in a straight line or radial direction, but can only flow tangentially along the arrangement direction of the guide vane 122. At least two guide vanes 122 jointly apply the same circumferential guiding force to the water flow, so that the water flow obtains a tangential velocity component along the circumferential direction of the main body 12. This causes the water flow in the water passage cavity 11 to rotate in the circumferential direction and continuously converge to form a stable vortex, which improves the water flow disturbance effect and enhances the water flow scouring ability. The vortex applies torque to the blade 30, driving the filter cartridge assembly 20 to rotate, thereby achieving the self-cleaning effect of the filter cartridge assembly 20.

[0071] In one possible implementation, the number of water guide vanes 122 can be 2, 3, 4 or 5, etc., arranged sequentially along the circumference of the main body 12 with the central axis of the main body 12 as the center.

[0072] In one possible implementation, the spacing between every two adjacent water guide vanes 122 is equal, thereby improving the water flow disturbance effect.

[0073] In one possible implementation, the water guide plate 122 is in the shape of a spiral curved surface. One end of the water guide plate 122 is fixed to the inner wall of the main body 12, and the other end of the water guide plate 122 faces the central axis of the main body 12 and extends along the spiral trajectory.

[0074] The water guide plate 122 is spiral curved and is used to guide and change the direction of water flow, so that the water flow flows along the spiral trajectory to form a vortex water flow. The water guide plate 122 can be integrally formed on the inner wall of the main body 12, or it can be installed on the inner wall of the main body 12 by snap-fit ​​or other means. The water guide plate 122 continuously guides the water flow during the flow process, maintaining the stability of the vortex water flow.

[0075] In one possible implementation, one edge of the water guide 122 is an arc edge, which is fixed to the inner wall of the main body 12, facilitating the spiral extension of the water guide 122 along the high end and circumferential direction of the main body 12. The other edge of the water guide 122 is a bevel or a vertical edge, which is positioned relative to the arc edge. The top of the bevel or vertical edge is close to the position of the outward expansion 13 and connected to the top of the arc edge. The bottom end of the bevel or vertical edge extends to a position close to the bottom wall of the water passage cavity 11. The bottom end of the water guide 122 has an arc-shaped edge, the two ends of which are respectively connected to the arc edge and the bevel.

[0076] In one possible implementation method, refer to Figure 1 As shown, the filter cartridge assembly 20 also includes a coarse filter cartridge 22, which is located inside the fine filter chamber 211. The fine filter cartridge 21 has a first fastening part 213, and the coarse filter cartridge 22 has a second fastening part 221. The second fastening part 221 and the first fastening part 213 fasten to each other.

[0077] Both the fine filter cartridge 21 and the coarse filter cartridge 22 have multiple filter holes on their outer peripheral surfaces. The diameter of the filter holes in the coarse filter cartridge 22 is larger than that in the fine filter cartridge 21. Through the continuous scouring of the vortex flow field, the filter cartridge assembly 20 achieves a self-cleaning function, effectively preventing the accumulation of food residue on the surface of the filter cartridge assembly 20 and the clogging of the filter holes, thus ensuring the long-term stable operation of the filter cartridge assembly 20.

[0078] Since the filter cartridge assembly 20 also includes a coarse filter cartridge 22, which is located inside the fine filter chamber 211, it achieves graded filtration. The coarse filter cartridge 22 and the fine filter cartridge 21 respectively intercept residues of different particle sizes, effectively improving filtration accuracy and impurity retention capacity.

[0079] In one possible implementation, the second engaging portion 221 is a slot formed on opposite sides of the coarse filter cartridge 22, and the first engaging portion 213 is a snap fastener integrally connected to the top of the coarse filter cartridge 22. The number of slots and snap fasteners are the same, and their positions correspond. Alternatively, the first engaging portion 213 is a slot formed on opposite sides of the fine filter cartridge 21, and the second engaging portion 221 is a snap fastener integrally connected to the top of the coarse filter cartridge 22. The number of slots and snap fasteners are the same, and their positions correspond.

[0080] By engaging the second fastening part 221 with the first fastening part 213, the fine filter cartridge 21 and the coarse filter cartridge 22 can be detachably connected and precisely positioned, simplifying the assembly process. Reliable fixing can be achieved without additional fasteners, effectively limiting the axial and circumferential movement of the coarse filter cartridge 22, preventing loosening and shaking during use, and improving connection strength and stability.

[0081] In one possible implementation method, refer to Figure 1 , Figure 7 and Figure 8 As shown, the filtration device also includes a filter element 40. The inner wall of the filter element 40 is a downwardly concave arc-shaped surface. A mounting hole 41 is provided in the filter element 40, and the filter cartridge assembly 20 is located in the mounting hole 41. The mounting hole 41 is located at the lowest position of the filter element 40.

[0082] The filter element 40 has an arc-shaped design and multiple filter holes. It effectively intercepts impurities. Under the action of the swirling water flow within the water passage chamber 11, [the impurities are filtered]. Figure 8 As shown, the angle between the filter element 40 and the water flow direction F is acute, causing the swirling water flow to exert not only a tangential scouring force F1 on the surface of the filter element 40, but also a vertically downward impact force F2. The tangential scouring force F1 can drag and peel off residues adhering to the surface of the filter element 40, reducing the retention and accumulation of impurities on the surface of the filter element 40, removing impurities from the filter element 40, and achieving a cleaning effect. The vertically downward impact force F2 allows the water to flow more smoothly through the filter element 40, resulting in a more uniform flow field distribution, which improves the flow capacity while ensuring the filtration effect. Compared with the traditional structure where the water flow and the filter element 40 are at approximately a right angle, this reduces the problem of clogging of the filter element 40.

[0083] In one possible implementation, the mounting hole 41 is adapted to mount the filter cartridge assembly 20. The mounting hole 41 may be a circular hole, and there is a gap between the inner wall of the mounting hole 41 and the filter cartridge assembly 20 to prevent the filter sheet 40 from interfering with the rotation of the filter cartridge assembly 20.

[0084] The present invention also provides a dishwasher, including the above-described filtration device.

[0085] In one possible implementation method, refer to Figure 9 and Figure 10 As shown, the dishwasher also includes an inner tub 50, which has a washing chamber 51 inside. A connection hole 52 is provided at the bottom of the inner tub 50. A water cup 10 is located at the bottom of the inner tub 50, and the edge of the water cup 10 is fixed inside the connection hole 52.

[0086] In one possible implementation, the inner wall of the connection hole 52 has a recessed step 521, and the edge of the filter 40 has an outward flange 42, which abuts against the recessed step 521 to support the filter 40.

[0087] In one possible implementation, a sealing ring is provided between the outward flange 42 and the recessed step 521. This sealing ring is used to seal the mating position of the outward flange 42 and the recessed step 521, eliminate the gap between the outward flange 42 and the recessed step 521, and prevent residue from entering below the filter sheet 40, thus affecting the hygiene of use.

[0088] In one possible implementation, the sealing ring may be wrapped around the outer periphery of the outward flange 42.

[0089] In one possible implementation, the sealing ring is elastic, for example, it can be a rubber ring or a silicone ring, which is heat-resistant and resilient, ensuring that it maintains its seal even after long-term use.

[0090] In one possible implementation, the longitudinal section of the sealing ring can be trapezoidal, and the sealing ring and the recessed step 521 form an interference fit. During installation, the sealing ring is pressed into the recessed step 521 to form a physical seal and prevent residue from penetrating.

[0091] Considering that the filter cartridge assembly 20 is assembled into the water cup 10 through the mounting hole 41 of the filter disc 40, the filter disc 40 is squeezed by the filter cartridge assembly 20, and the periphery of the mounting hole 41 is prone to deformation. There is a gap between the outer periphery of the filter disc 40 and the inner bottom wall of the inner liner 50. When the program is running, the residue is easily stuck when passing through the filter disc 40, thus clogging the filter disc 40.

[0092] Therefore, in this application, there is a gap between the inner wall of the mounting hole 41 and the outer wall of the filter cartridge assembly 20, which can prevent the filter element 40 from being squeezed by the filter cartridge assembly 20. In addition, the sealing ring and the outer flange 42 of the filter element 40 are supported by the recessed step 521. The elastic deformation characteristics of the sealing ring enable the sealing ring to adapt to the slight deformation of the filter element 40 caused by the squeezing of the filter cartridge assembly 20, ensuring that the sealing ring is always in close contact with the recessed step 521. The recessed step 521 provides support and limit for the sealing ring, preventing the sealing ring from being displaced due to water flow impact or vibration.

[0093] In one possible implementation, the dishwasher also includes a spray arm, a shelf assembly, etc. The shelf assembly is disposed in the washing chamber 51 and is used to place tableware. The spray arm is rotatably disposed in the washing chamber 51 and is used to spray water onto the tableware placed in the shelf assembly to clean the tableware. The residue on the tableware flows downward with the water flow and is filtered by the filter plate 40 and the filter cartridge assembly 20. The washing pump draws the filtered washing water and then sprays it through the rotating spray arm to clean the tableware.

[0094] The other structural features of the dishwasher are similar to those in the existing design and will not be described in detail here.

[0095] The present invention provides a filtration device and dishwasher. Since the outer wall of the filter cartridge assembly 20 has blades 30, the vortex water flow in the water passage cavity 11 applies torque to the blades 30, causing the blades 30 to rotate and drive the filter cartridge assembly 20 to rotate in the water passage cavity 11. The water flow washes the surface of the filter plate 40, causing the residue remaining on the surface of the filter plate 40 to fall off and reducing the clogging rate.

[0096] The filtration device and dishwasher provided in this embodiment of the invention can improve the self-cleaning effect by rotating the fine filter cylinder 21 and the coarse filter cylinder 22 synchronously, thereby peeling off the residue attached to the surface and ultimately achieving a synergistic effect of multi-stage filtration and self-cleaning.

[0097] In the description of this invention, it should be understood that the terms "center," "length," "width," "thickness," "top," "bottom," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," "outer," "axial," and "circumferential," etc., used to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the indicated position or component must have a specific orientation, or a specific structure and operation, and therefore should not be construed as a limitation of this invention.

[0098] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0099] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can 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 invention according to the specific circumstances.

[0100] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A filtration device, characterized in that, include: Water cup (10), the water cup (10) having a water passage cavity (11); The filter cartridge assembly (20) is rotatably disposed in the water passage cavity (11). The outer wall of the filter cartridge assembly (20) has blades (30). The blades (30) are configured to drive the filter cartridge assembly (20) to rotate in the water passage cavity (11) under the driving action of the vortex water flow in the water passage cavity (11).

2. The filtration device according to claim 1, characterized in that, The filter cartridge assembly (20) includes a fine filter cartridge (21), which has a fine filter chamber (211) inside, and the blades (30) are disposed on the outer wall of the fine filter cartridge (21). The plurality of said blades (30) are arranged at intervals along the circumference of said fine filter cartridge (21); and / or, The blade (30) extends along the depth direction of the filter cartridge assembly (20).

3. The filtration device according to claim 2, characterized in that, The blade (30) has a root connected to the fine filter tube (21) and a free end away from the root, and the blade (30) is curved in an arc shape from the root to the free end.

4. The filtration device according to claim 2, characterized in that, The outer wall of the fine filter cylinder (21) has a guide groove (212) which is arranged along the circumference of the fine filter cylinder (21). The inner wall of the water cup (10) is provided with a guide protrusion (14) which extends into the guide groove (212) to guide the fine filter cylinder (21) to rotate circumferentially.

5. The filtration device according to any one of claims 1-4, characterized in that, The water cup (10) includes a main body (12) and an outer expansion (13). The bottom of the main body (12) has a circulating water inlet (121) for communicating with a washing pump. The outer expansion (13) is connected to the top of the main body (12), and the curvature of the outer expansion (13) is less than that of the main body (12).

6. The filtration device according to claim 5, characterized in that, The inner wall of the main body (12) is provided with at least two water guide plates (122). The at least two water guide plates (122) are arranged at intervals along the circumference of the main body (12) with the central axis of the main body (12) as the center, so as to guide the water flow in the water passage cavity (11) to form a water flow vortex.

7. The filtration device according to claim 6, characterized in that, The water guide plate (122) is spiral curved. One end of the water guide plate (122) is fixed to the inner wall of the main body (12), and the other end of the water guide plate (122) faces the central axis of the main body (12) and extends along the spiral trajectory.

8. The filtration device according to claim 2, characterized in that, The filter cartridge assembly (20) further includes a coarse filter cartridge (22), which is located inside the fine filter chamber (211). The fine filter cartridge (21) has a first fastening part (213), and the coarse filter cartridge (22) has a second fastening part (221). The second fastening part (221) and the first fastening part (213) fasten to each other.

9. The filtration device according to any one of claims 1-4, characterized in that, The filter device also includes a filter element (40), the inner wall of which is a downward-facing concave arc shape, and an installation hole (41) is provided in the filter element (40), and the filter cartridge assembly (20) is located in the installation hole (41).

10. A dishwasher, characterized in that, Includes the filtration device according to any one of claims 1-9.

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