Filter structure and dishwasher

Abstract

The utility model provides a filter structure and dish washer, wherein, a filter structure, include: filter screen, be equipped with connecting hole in filter screen, connecting hole is used to install filter drum subassembly, filter screen includes a plurality of guide portion, a plurality of guide portion is along the circumferential arrangement of connecting hole, at least part guide portion from the edge of filter screen extends to connecting hole, the guide portion is equipped with filter mesh, the guide portion is protruding, to increase the area of filter screen. The filter structure and dish washer provided by the utility model are used to solve the technical problem that the filtering efficiency of the existing filter structure to water flow is low and the water flow is easily hindered.

Description

Technical Field

[0001] This utility model relates to the field of dishwasher technology, and in particular to a filter structure and a dishwasher. Background Technology

[0002] In modern homes, dishwashers have become a common kitchen appliance, and their cleaning effectiveness largely depends on their internal filtration system.

[0003] Typically, dishwashers are equipped with a filtration system. During operation, food residue and other impurities in the wash water are filtered and collected through coarse and fine filters, preventing them from entering the drainage system or clogging the spray arms. Some filtration systems use flat screens, which are effective at collecting food residue when there is little residue and have minimal impact on the return water flow. However, in actual use, dishwashers often process large quantities of dishes, resulting in potentially high levels of food residue in the wash water. A large amount of food residue can easily adhere to the flat screen, significantly reducing filtration efficiency, hindering water flow, and affecting the overall performance of the dishwasher.

[0004] Therefore, it is urgent to improve the filtration structure to increase filtration efficiency and reduce obstruction to water flow. Utility Model Content

[0005] This utility model provides a filter structure and a dishwasher to solve the technical problems of low filtration efficiency and easy obstruction of water flow.

[0006] To achieve the above objectives, this utility model provides a filter structure, comprising: a filter screen, wherein the filter screen has a connecting hole for mounting a filter cartridge assembly, the filter screen includes a plurality of guide portions arranged circumferentially along the connecting hole, at least a portion of the guide portions extending from the edge of the filter screen to the connecting hole, the guide portions having filter mesh openings, and the guide portions being convex to increase the area of ​​the filter screen.

[0007] The filter structure provided in this application includes a filter screen with multiple guide portions arranged circumferentially along the connecting hole. At least some of the guide portions extend from the edge of the filter screen to the connecting hole, which enhances the guiding effect on the water flow. Under the guidance of the guide portions, the water flow moves along the edge of the filter screen toward the connecting hole, ultimately collecting food residue and other particulate matter in the water flow into the filter cartridge assembly installed inside the connecting hole. The guide portions are convex, which can effectively increase the surface area of ​​the filter screen, meaning that more water can contact the filter screen per unit time, thereby improving the filtration efficiency.

[0008] In one possible implementation, the guide extends radially along the connection hole; or, from the edge of the filter to the connection hole, the guide extends in a counterclockwise spiral shape centered on the connection hole.

[0009] In one possible implementation, the guide portion includes a first guide network, the first guide network including two interconnected first filter surfaces, the top ends of the two first filter surfaces being interconnected to form a convex peak.

[0010] In one possible implementation, a first guide groove is formed at the location where two adjacent first guide veins are connected to each other, and the first guide groove and the protrusion are arranged at intervals along the circumferential direction of the connecting hole.

[0011] In one possible implementation, the protruding portion extends from the edge of the filter screen to the connecting hole; and / or,

[0012] The first guide groove extends from the edge of the filter screen to the connection hole.

[0013] In one possible implementation, the height of the protrusions gradually decreases from the edge of the filter screen to the connecting hole, the depth of the first guide groove gradually decreases, and the distance between two adjacent protrusions gradually decreases.

[0014] In one possible implementation, the guide portion includes a second guide network, the second guide network including a first transition surface, a second transition surface and a convex top surface, the convex top surface being connected between the top end of the first transition surface and the top end of the second transition surface.

[0015] In one possible implementation, a second guide groove is formed between two adjacent second guide veins, and the width of the second guide groove gradually decreases from the edge of the filter screen to the connecting hole.

[0016] In one possible implementation, the filter screen is concave.

[0017] This application also provides a dishwasher, including the above-described filter structure.

[0018] The present invention provides a filter structure and dishwasher. Since the filter screen includes multiple guide parts, which are raised and have a reinforcing effect similar to ribs, the filter screen can better resist bending and deformation, effectively improve the structural strength of the filter screen in the direction of extension of the guide parts, improve the overall structural stability of the filter screen, effectively resist the impact of water flow on the filter screen, and improve the stability of the filter screen in use.

[0019] This utility model provides a filter structure and a dishwasher. The filter screen includes multiple guide parts, which gives the filter screen a larger surface area. The guide parts can effectively optimize the water flow path. The two work together to improve the overall filtration efficiency and performance of the filter screen, and ensure the water return effect and overall working effect of the dishwasher.

[0020] 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 the filter structure 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

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a diagram showing the installation structure of an existing filter screen.

[0023] Figure 2 A cross-sectional view of an existing filter screen;

[0024] Figure 3 A three-dimensional structural diagram of the filter structure provided in the embodiment of this utility model;

[0025] Figure 4 A three-dimensional structural diagram of the filter screen provided in the embodiment of this utility model;

[0026] Figure 5 for Figure 4 Enlarged view of the structure at point A;

[0027] Figure 6 A three-dimensional structural diagram of another filter structure provided in an embodiment of this utility model;

[0028] Figure 7 for Figure 6 Enlarged view of the structure at point B;

[0029] Figure 8 This is a partial structural diagram of a dishwasher provided in an embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 10-Filter screen;

[0032] 11-Connecting hole;

[0033] 12-First guiding meridian;

[0034] 121 - First filter surface;

[0035] 122 - First guide groove;

[0036] 123 - Convex peak;

[0037] 13-Second guiding pathway;

[0038] 131 - First transition surface;

[0039] 132 - Second transition surface;

[0040] 133 - Convex top surface;

[0041] 14-Second guide groove;

[0042] 15- Gap;

[0043] 20 - Filter cartridge assembly;

[0044] 30-Inner liner bottom plate;

[0045] 40-Lower spray arm;

[0046] 50-Fixed base;

[0047] 60 - Existing filters. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0049] The dishwasher's filter is a crucial component, responsible for capturing and filtering food residue and other particles generated during the washing process to prevent clogging the drain system or damaging the dishwasher's pump and spray arms. (Reference) Figure 1 and Figure 2 As shown, the existing filter screen 60 is usually a flat, fine mesh structure that can cover the drainage area at the bottom of the dishwasher. The existing filter screen 60 has low filtration efficiency. During use, food residue and other particles may accumulate on the filter screen, causing blockage and affecting the return water.

[0050] In view of this, the filter structure and dishwasher provided by this utility model include a filter screen with multiple guide parts. The multiple guide parts improve the guiding effect of water flow, so that the water flow, under the guidance of the guide parts, flows along the edge of the filter screen toward the connecting hole, and finally collects food residue and other particles in the water flow into the filter cylinder assembly installed in the connecting hole. The guide parts are convex, which can effectively increase the surface area of ​​the filter screen, meaning that more water can contact the filter screen per unit time, thereby improving the filtration efficiency, ensuring that the return water is not affected, and ensuring the overall performance of the dishwasher.

[0051] The following description, with reference to the accompanying drawings, describes the filter structure and dishwasher provided in the embodiments of this utility model.

[0052] refer to Figure 3 , Figure 4 and Figure 5 As shown, this application embodiment provides a filter structure, including: a filter screen 10, a connection hole 11 is provided in the filter screen 10, the connection hole 11 is used to install a filter cartridge assembly 20, the filter screen 10 includes a plurality of guide portions, the plurality of guide portions are arranged circumferentially along the connection hole 11, at least some of the guide portions extend from the edge of the filter screen 10 to the connection hole 11, the guide portions have filter mesh, and the guide portions are convex to increase the area of ​​the filter screen 10.

[0053] The filter structure provided in this application includes a filter screen 10 with multiple guide portions arranged circumferentially along the connecting hole 11. At least some of the guide portions extend from the edge of the filter screen 10 to the connecting hole 11, which improves the guiding effect on the water flow. Under the guidance of the guide portions, the water flow moves along the edge of the filter screen 10 toward the connecting hole 11, and finally collects food residue and other particles in the water flow into the filter cartridge assembly 20 installed in the connecting hole 11. The guide portions are convex, which can effectively increase the surface area of ​​the filter screen 10, meaning that more water can come into contact with the filter screen 10 per unit time, thereby improving the filtration efficiency.

[0054] Furthermore, the filter structure provided in this application includes multiple guide portions in which the filter screen 10 is raised, similar to the effect of reinforcing ribs. This allows the filter screen 10 to better resist bending and deformation, effectively improving the structural strength of the filter screen 10 in the direction of extension of the guide portions. The overall structural stability of the filter screen 10 is improved, effectively resisting the impact of water flow on the filter screen 10 and enhancing the stability of the filter screen 10 in use.

[0055] The filter structure provided in this application embodiment has a convex guide section. Food residues and other particles in the water flow may deviate from the streamline due to inertia and collide with the surface of the guide section, thereby improving the filter screen 10's ability to capture food residues and other particles and improving the removal efficiency of food residues and other particles.

[0056] In one possible implementation, the filter 10 includes multiple guides. The number of guides is not specifically limited here. The number of guides can be 2, 3, 20, 30 or more. The number of guides can be flexibly selected according to the needs of use.

[0057] In one possible implementation, the guide portions extend from the edge of the filter screen 10 to the connection hole 11, which greatly increases the surface area of ​​the filter screen 10 and also improves the guiding effect of the guide portions on the water flow, thereby improving the filtration efficiency.

[0058] In one possible implementation, the connecting hole 11 is a circular hole.

[0059] In one possible implementation, the guide extends radially along the connection hole 11. The guide is used to guide the flow direction and path of the water flow, reduce turbulence in the flow, increase the contact area between the water flow and the filter screen 10, and help the water flow enter the filter cartridge assembly 20 installed in the connection hole 11 more smoothly.

[0060] In one possible implementation, the guide extends in a counterclockwise spiral shape from the edge of the filter screen 10 to the connection hole 11.

[0061] In this embodiment, the guide section has the effect of guiding the water flow in a counterclockwise spiral shape. The rotating water flow can generate a self-cleaning flushing effect on the filter screen 10, which can wash away food residue and other particles attached to the filter screen 10, helping to prevent the mesh of the filter screen 10 from becoming clogged and reducing maintenance needs.

[0062] In the Northern Hemisphere, the Coriolis effect of the Earth's rotation affects fluid movement, causing the fluid to tend to rotate counterclockwise. In this embodiment, the guide extends in a counterclockwise spiral shape with the connection hole 11 as the center, which helps to guide the flow synchronously. This guides food residue and other particles in the water flow to enter the filter cartridge assembly 20 installed in the connection hole 11 with the water flow in a specific rotational pattern, thereby enhancing the rotational momentum of the water flow, reducing flow resistance and turbulence, and thus improving drainage efficiency.

[0063] The lower spray arm 40 has a spray hole on the side facing the filter screen 10. The spray hole can be arranged at an angle. When the lower spray arm 40 rotates, the direction of the water flow sprayed from the spray hole and the direction of the water flow on the filter screen 10 are both rotated counterclockwise, which has a dual synergistic effect. This synergistic effect helps to push food residue to the connection hole 11 of the filter screen 10, making it easier to collect food residue.

[0064] In one possible implementation, the guide portion has a first end located at the edge of the filter screen 10 and a second end located on the inner wall of the connecting hole 11. The straight line connecting the first end of the guide portion to the center of the connecting hole 11 is called the first side line, and the straight line connecting the second end of the guide portion to the center of the connecting hole 11 is called the second side line. With the center of the connecting hole 11 as the center, the included angle between the first side line and the second side line can be 5°, 15°, 20°, 60°, 90°, 120°, 150°, etc. Of course, the included angle between the two side lines can also be other angles.

[0065] The guide section has mesh openings, allowing some water to pass through, thus improving filtration efficiency. When the water flow is large, it may not fall vertically through the mesh openings in the guide section in time, and instead will be guided by the guide section to flow along the surface of the filter screen 10.

[0066] In one possible implementation method, refer to Figure 3 , Figure 4 and Figure 5 As shown, the guiding section includes a first guiding vein 12, which includes two interconnected first filter surfaces 121. The top ends of the two first filter surfaces 121 are interconnected to form a protruding peak 123. The first guiding vein 12 guides the water flow, thereby optimizing the flow efficiency of the water.

[0067] In one possible implementation, the first filter surface 121 may be an inclined plane, and the cross-sectional shape of the first guide vein 12 is an inverted V-shape or U-shape.

[0068] In one possible implementation, the first guide vein 12 extends radially along the connection hole 11, extending from the edge of the filter 10 to the connection hole 11.

[0069] In one possible implementation, the first guide vein 12 extends in a spiral shape with the connection hole 11 as its center, extending from the edge of the filter screen 10 to the connection hole 11.

[0070] In one possible implementation, the positions where two adjacent first guide veins 12 are connected to form a first guide groove 122. The first guide groove 122 serves to guide the water flow along a specific path, which can reduce flow resistance and turbulence, increase the surface area of ​​the filter screen 10, and thus improve the filtration efficiency.

[0071] Both the first guide vein 12 and the first guide groove 122 are provided with mesh to allow water droplets to pass through, thereby improving filtration efficiency.

[0072] In one possible implementation, the first guide groove 122 and the protrusion 123 are arranged alternately along the circumferential direction of the connecting hole 11. This gives the filter screen 10 a palm leaf-like structure. The filter screen 10 has the first guide groove 122 at a relatively low position and the protrusion 123 at a relatively high position. The first guide groove 122 and the protrusion 123 are arranged alternately to form a folded shape, which effectively increases the surface area of ​​the filter screen 10. The larger surface area can capture more particles and impurities, thereby improving the filtration efficiency of the filter screen 10. The alternating arrangement of the first guide groove 122 and the protrusion 123 also helps to prevent food residue and other particulate matter from accumulating on the filter screen 10, reducing the problem of filter screen 10 clogging.

[0073] In one possible implementation, the raised portion 123 extends from the edge of the filter screen 10 to the connecting hole 11. The raised portion 123 can enhance the structural strength of the filter screen 10, protect the filter screen 10 from deformation or damage under long-term water flow impact, and also help reduce the accumulation of food residue and other particles on the surface of the filter screen 10, reducing the problem of clogging of the mesh of the filter screen 10.

[0074] In one possible implementation, the first guide groove 122 extends from the edge of the filter screen 10 to the connecting hole 11. The first guide groove 122 provides better guidance for water flow, increases the contact area between food residue and other particles and the filter screen 10, and reduces the obstruction effect of the filter screen 10 on water flow.

[0075] In this embodiment, the guide portion includes a first guide vein 12, which gives the filter screen 10 a larger surface area, and the first guide vein 12 can effectively optimize the flow path of water. The two work together to improve the overall filtration efficiency and filtration performance of the filter screen 10.

[0076] In one possible implementation, from the edge of the filter screen 10 to the connecting hole 11, the height of the protrusion 123 gradually decreases, the depth of the first guide groove 122 gradually decreases, and the distance between two adjacent protrusions 123 gradually decreases. When there is a lot of residue in the washing water, the first filter surface 121 and the first guide groove 122 can provide good guidance for the residue, directing it into the filter cartridge assembly 20 installed in the connecting hole 11. This prevents the residue from floating disorderly on the filter screen 10, reducing the risk of clogging and affecting the filtration effect.

[0077] In other possible implementations, along the extension direction of the first guide vein 12, from the edge of the filter screen 10 to the connecting hole 11, the height of the convex portion 123 gradually increases or remains constant, and the depth of the first guide groove 122 increases or remains constant.

[0078] The gradual change in height of the protrusion 123 and depth of the first guide groove 122 helps water flow smoothly from the edge of the filter screen 10 to the connecting hole 11, reducing turbulence and flow resistance, and ensuring that the water is fully filtered when passing through the filter screen 10. Furthermore, it makes it easier for food residue and other particles in the water to be collected inside the filter cartridge assembly 20 installed in the connecting hole 11 after the water flows from the edge of the filter screen 10, preventing food residue and other particles from accumulating on the surface of the filter screen 10 and reducing clogging problems.

[0079] In one possible implementation method, refer to Figure 6 , Figure 7 and Figure 8 As shown, the guide section includes a second guide network 13, which includes a first transition surface 131, a second transition surface 132, and a convex top surface 133. The convex top surface 133 connects the top of the first transition surface 131 and the top of the second transition surface 132. The second guide network 13 increases the surface area of ​​the filter screen 10, improves filtration efficiency, guides the flow path of water, and reduces the accumulation of food residue and other particles on the convex top surface 133, thus preventing clogging. Furthermore, it enhances the structural strength of the filter screen 10, strengthens its resistance to deformation and damage from water flow impact, and improves the stability of the filter screen 10 during use.

[0080] In one possible implementation, the second guide vein 13 extends radially along the connection hole 11, extending from the edge of the filter 10 to the connection hole 11.

[0081] In one possible implementation, the second guide vein 13 extends in a spiral shape with the connection hole 11 as its center, extending from the edge of the filter screen 10 to the connection hole 11.

[0082] In one possible implementation, the first transition surface 131 can be a slope or a vertical surface, and the convex top surface 133 can be a plane or an arched surface.

[0083] In one possible implementation, the second guide vein 13 may be a strip-shaped boss with a rectangular or trapezoidal cross-sectional shape.

[0084] In one possible implementation, the widths of the individual second guide veins 13 can be equal or unequal.

[0085] In one possible implementation, the second guide vein 13 extends radially along the connecting hole 11, or the second guide vein 13 extends spirally with the connecting hole 11 as the center. The second guide vein 13 is used to guide the flow direction and path of the water flow, reduce turbulence in the flow, increase the contact area between the water flow and the filter screen 10, and help the water flow enter the filter cartridge assembly 20 installed in the connecting hole 11 more smoothly.

[0086] In one possible implementation method, refer to Figure 6 , Figure 7 and Figure 8 As shown, a second guide groove 14 is formed between two adjacent second guide veins 13. The width of the second guide groove 14 gradually decreases from the edge of the filter screen 10 to the connecting hole 11. The second guide groove 14 guides the water flow along a specific path, reducing flow resistance and turbulence.

[0087] Both the second guide vein 13 and the second guide groove 14 have mesh openings, allowing water droplets to pass through, thereby improving filtration efficiency.

[0088] In one possible implementation, the filter screen 10 is concave, and the connecting hole 11 is located at the lowest point of the filter screen 10. That is, the filter screen 10 is high on all sides, and the connecting hole 11 is slightly lower, which facilitates water flow and residue to more easily enter the connecting hole 11 located at the lowest point.

[0089] In one possible implementation, the filter 10 can be a one-piece molded plastic part or a metal material, such as a stainless steel filter.

[0090] This application also provides a dishwasher, including the above-described filter structure.

[0091] The dishwasher includes an inner tub with an inner tub base plate 30. The inner tub base plate 30 is recessed downward to form a groove with a central opening. A water cup is connected to the back of the inner tub base plate 30. A filter screen 10 is disposed on this groove.

[0092] Water and food residue on the inner liner bottom plate 30 flow downwards into the groove opened in the inner liner bottom plate 30. Some water enters the water cup after being filtered by the filter screen 10, while some water and food residue enter the filter cartridge assembly 20 inside the connection hole 11. The food residue is collected inside the filter cartridge assembly 20 for easy centralized cleaning by the user.

[0093] refer to Figure 8 As shown, the dishwasher also includes shelves, spray assembly, etc. The inner tub has a receiving space, and the shelves are set in the receiving space. The spray assembly includes a water pump, a piping unit, and an upper spray arm and a lower spray arm 40. The water pump supplies water to the piping unit, and the water flows along the piping unit into the lower spray arm 40 and the upper spray arm, and is sprayed out through the spray nozzles of the lower spray arm 40 and the upper spray arm, respectively spraying water towards the shelf on the lower side and the upper side of the shelf to clean the dishes placed on the shelf and improve the cleaning effect. The wastewater from washing the dishes is collected in the water cup, and the residue is collected in the above-mentioned filter structure.

[0094] A fixed base 50 is fixedly connected to the water cup. The fixed base 50 has a water passage hole that runs through its top and bottom. The lower end of the water passage hole is connected to the water cup. The lower spray arm 40 is set above the fixed base 50 and is rotatably connected to the fixed base 50.

[0095] In this embodiment, the filter screen 10 has a notch 15 through which the fixing seat 50 passes. The lower half of the filter cartridge assembly 20 is located in the water cup, and the upper half of the filter cartridge assembly 20 is higher than the water cup, which facilitates the filtration of water entering the water cup and prevents food residue and other particles from entering the water cup.

[0096] The other structural details of the dishwasher are similar to those in the existing design and will not be described in detail here.

[0097] In the filter structure and dishwasher provided in this application, the filter screen 10 includes multiple guide portions. The guide portions are convex and have a larger surface area than ordinary planar structures. Therefore, the water passage area per unit time is larger, which can improve the return water speed, thereby improving the working efficiency of the washing pump and effectively reducing energy consumption.

[0098] It should be noted that the numerical values ​​and ranges involved in this application are approximate values. Due to the influence of the manufacturing process, there may be a certain range of errors, which can be considered negligible by those skilled in the art.

[0099] In the description of this utility model, it should be understood that the terms "center", "length", "width", "thickness", "top", "bottom", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "axial", "circumferential", etc., used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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 utility model.

[0100] 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 utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0101] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," 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 for communication; 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. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0102] 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.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model 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 therein. Such 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 this utility model.

Claims

1. A filter structure, characterized in that, include: A filter screen (10) has a connecting hole (11) inside, the connecting hole (11) is used to install a filter cartridge assembly (20), the filter screen (10) includes a plurality of guide portions, the plurality of guide portions are arranged circumferentially along the connecting hole (11), at least a portion of the guide portions extend from the edge of the filter screen (10) to the connecting hole (11), the guide portions have filter mesh, and the guide portions are convex to increase the area of ​​the filter screen (10).

2. The filter structure according to claim 1, characterized in that, The guide portion extends radially along the connecting hole (11); or, From the edge of the filter screen (10) to the connection hole (11), the guide extends in a counterclockwise spiral shape with the connection hole (11) as the center.

3. The filter structure according to claim 1, characterized in that, The guide portion includes a first guide vein (12), the first guide vein (12) includes two first filter surfaces (121) connected to each other, the top ends of the two first filter surfaces (121) are connected to each other to form a convex peak (123).

4. The filter structure according to claim 3, characterized in that, The first guide groove (122) is formed at the position where two adjacent first guide veins (12) are connected to each other. Along the circumferential direction of the connecting hole (11), the first guide groove (122) and the protrusion (123) are arranged at intervals.

5. The filter structure according to claim 4, characterized in that, The protruding portion (123) extends from the edge of the filter screen (10) to the connecting hole (11); and / or, The first guide groove (122) extends from the edge of the filter screen (10) to the connection hole (11).

6. The filter structure according to claim 4, characterized in that, From the edge of the filter screen (10) to the connecting hole (11), the height of the protrusion (123) gradually decreases, the depth of the first guide groove (122) gradually decreases, and the distance between two adjacent protrusions (123) gradually decreases.

7. The filter structure according to claim 1, characterized in that, The guide portion includes a second guide network (13), which includes a first transition surface (131), a second transition surface (132), and a convex top surface (133). The convex top surface (133) is connected between the top end of the first transition surface (131) and the top end of the second transition surface (132).

8. The filter structure according to claim 7, characterized in that, A second guide groove (14) is formed between two adjacent second guide veins (13), and the width of the second guide groove (14) gradually decreases from the edge of the filter screen (10) to the connecting hole (11).

9. The filter structure according to any one of claims 1-8, characterized in that, The filter screen (10) is concave.

10. A dishwasher, characterized in that, Includes the filter structure described in any one of claims 1-9.

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