Filter structure and dishwasher

Abstract

This utility model provides a filter structure and a dishwasher. The filter structure includes a filter screen with a connecting hole for mounting a filter cartridge assembly. The filter screen includes a main body and multiple guide portions disposed on the main body, with a flow channel formed between adjacent guide portions. From the edge of the filter screen to the connecting hole, along the extension direction of the flow channel, at least a portion of the flow area of ​​the flow channel decreases. This utility model provides a filter structure and a dishwasher to solve the technical problems of low water filtration efficiency and easy obstruction of water flow.

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, and food residue easily adheres 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, including: a filter screen, wherein the filter screen has a connecting hole for installing a filter cartridge assembly, the filter screen includes a main body and a plurality of guide parts disposed on the main body, and a flow channel is formed between two adjacent guide parts;

[0007] From the edge of the filter screen to the connection hole, along the extension direction of the flow channel, at least a portion of the flow area of ​​the flow channel decreases.

[0008] This application provides a filter structure. The filter screen includes a main body and multiple guide parts disposed on the main body. A flow channel is formed between two adjacent guide parts, which can better guide water and food residue to flow from the edge of the filter screen toward the connecting hole through the flow channel, so that the food residue is collected into the filter cartridge assembly inside the connecting hole. From the edge of the filter screen to the connecting hole, along the extension direction of the flow channel, at least part of the flow area of ​​the flow channel decreases. At the location where the flow area of ​​the flow channel decreases, the water flow velocity increases, which can effectively improve the filtration efficiency. The increased water flow velocity also increases the impact force on the food residue per unit time, which helps to concentrate the food residue on the filter screen into the connecting hole, thereby improving the filtration and collection effect of food residue.

[0009] In one possible implementation, the width of at least a portion of the flow channel decreases from the edge of the filter screen to the connection hole along the extension direction of the flow channel.

[0010] In one possible implementation, a plurality of the guide portions are arranged in a counter-clockwise spiral from the edge of the filter screen to the connecting hole, forming a first guide network; or,

[0011] Multiple guide portions are arranged radially at intervals around the connection hole, forming a second guide network.

[0012] In one possible implementation, a plurality of the first guide veins are arranged at intervals around the periphery of the connection hole; or,

[0013] Multiple second guide veins are arranged at intervals around the periphery of the connection hole.

[0014] In one possible implementation, along the extension direction of the first or second guide vein, from the edge of the filter to the connecting hole, the spacing between two adjacent guide portions gradually decreases.

[0015] In one possible implementation, the spacing between two adjacent first guide veins is not equal to the spacing between two adjacent guide portions within each first guide vein; or...

[0016] The spacing between two adjacent second guide veins is not equal to the spacing between two adjacent guide portions in each second guide vein.

[0017] In one possible implementation, the guide portion is a convex hull protruding from the surface of the main body portion.

[0018] In one possible implementation, the guide portion is circular or elliptical.

[0019] In one possible implementation, both the main body and the guide section are provided with filter mesh.

[0020] This application also provides a dishwasher, including the above-described filter structure.

[0021] The filter structure and dishwasher provided by this utility model are based on Bernoulli's principle. Since the flow velocity of a fluid is inversely proportional to the cross-sectional area of ​​the flow channel, the flow velocity usually accelerates as the width of the flow channel decreases to maintain a constant flow rate. At locations where the flow velocity accelerates, the momentum and kinetic energy of the fluid also increase, and the impact force on food residue per unit time also increases. This means that the fluid can exert a greater force when impacting food residue per unit time, thus potentially pushing, breaking, or moving these food residues more effectively. This helps to move larger food particles, thereby concentrating food residue on the filter screen into the connecting holes, reducing the problem of food residue clogging the filter screen, and improving the filtration and collection effect of food residue.

[0022] The filter structure and dishwasher provided in this application achieve a dual synergistic effect by arranging the first guide vein in a counterclockwise spiral shape, combined with the spray nozzles of the lower spray arm spraying counterclockwise water flow, thereby improving the slag collection effect.

[0023] 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

[0024] 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.

[0025] Figure 1 This is a diagram showing the installation structure of an existing filter screen.

[0026] Figure 2 A cross-sectional view of an existing filter screen;

[0027] Figure 3 A three-dimensional structural diagram of the filter screen provided in the embodiment of this utility model;

[0028] Figure 4 Another three-dimensional structural diagram of the filter screen provided in the embodiment of this utility model;

[0029] Figure 5 for Figure 4 Enlarged view of the structure at point A;

[0030] Figure 6 This is a partial structural diagram of a dishwasher provided in an embodiment of the present invention.

[0031] Explanation of reference numerals in the attached figures:

[0032] 10-Filter screen;

[0033] 11-Connecting hole;

[0034] 12-Main body;

[0035] 13-Guide section;

[0036] 14 - Flow channel;

[0037] 15- Gap;

[0038] 16-First guiding thread;

[0039] 20 - Filter cartridge assembly;

[0040] 30-Inner liner bottom plate;

[0041] 40-Lower spray arm;

[0042] 50-Fixed base;

[0043] 60 - Existing filters;

[0044] B - Water flow path;

[0045] C - First position;

[0046] D - Second position. Detailed Implementation

[0047] 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.

[0048] 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 2As 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, when there is a lot of food residue in the water return, due to the suction of the drain pump, a large amount of residue can easily adhere to the existing filter screen 60, thereby hindering the flow of water and reducing the discharge efficiency. Food residue and other particles may accumulate on the filter screen, causing blockage and affecting the efficiency of water return.

[0049] In view of this, the filter structure and dishwasher provided by this utility model have a smaller flow area in at least part of the flow channel from the edge of the filter screen to the connecting hole along the extension direction of the flow channel. At the location where the flow area of ​​the flow channel is smaller, the water flow velocity is increased, which can effectively improve the filtration efficiency and increase the impact force on food residue per unit time. This helps to concentrate the food residue on the filter screen into the connecting hole and improve the filtration and collection effect of food residue.

[0050] The following description, with reference to the accompanying drawings, describes the filter structure and dishwasher provided in the embodiments of this utility model.

[0051] 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 main body 12 and a plurality of guide parts 13 disposed on the main body 12, and a flow channel 14 is formed between two adjacent guide parts 13; from the edge of the filter screen 10 to the connection hole 11, along the extension direction of the flow channel 14, at least a portion of the flow area of ​​the flow channel 14 decreases.

[0052] This application provides a filter structure. The filter screen 10 includes a main body 12 and a plurality of guide parts 13 disposed on the main body 12. A flow channel 14 is formed between two adjacent guide parts 13, which can better guide water flow and food residue through the flow channel 14 from the edge of the filter screen 10 toward the connection hole 11, so that the food residue is collected into the filter cartridge assembly 20 inside the connection hole 11. From the edge of the filter screen 10 to the connection hole 11, along the extension direction of the flow channel 14, at least part of the flow area of ​​the flow channel 14 becomes smaller. At the position where the flow area of ​​the flow channel 14 becomes smaller, the flow velocity of the water increases, which can effectively improve the filtration efficiency. The increased flow velocity of the water also increases the impact force on the food residue per unit time, which helps to concentrate the food residue on the filter screen 10 into the connection hole 11, thereby improving the filtration and collection effect of the food residue.

[0053] In one possible implementation, from the edge of the filter screen 10 to the connection hole 11, along the extension direction of the flow channel 14, at least part of the width of the flow channel 14 decreases. With the depth of the flow channel 14 remaining unchanged, the reduced width of the flow channel 14 can reduce the flow area of ​​the flow channel 14, thereby increasing the flow velocity of the water. The increased flow velocity can effectively improve the filtration efficiency and enhance the water return effect, thus improving the water return efficiency.

[0054] This application is based on Bernoulli's principle. Since the flow velocity of a fluid is inversely proportional to the cross-sectional area of ​​the flow channel 14, the flow velocity typically accelerates as the width of the flow channel 14 decreases to maintain a constant flow rate. At locations where the flow velocity accelerates, the momentum and kinetic energy of the fluid also increase, leading to a greater impact force on food residue per unit time. This means that the fluid can exert a greater force when impacting food residue per unit time, potentially pushing, breaking, or moving the food residue more effectively. This helps to move larger food particles, thereby concentrating the food residue on the filter screen 10 into the connecting holes 11, reducing the problem of food residue clogging the mesh of the filter screen 10, and improving the filtration and collection effect of food residue.

[0055] In one possible implementation, the connection hole 11 can be a circular hole.

[0056] In one possible implementation, from the edge of the filter screen 10 to the connection hole 11, the width of a portion of the flow channel 14 may be reduced, or the depth of a portion of the flow channel 14 may be reduced. Alternatively, the width of a portion of the flow channel 14 may be reduced, and the depth of that portion of the flow channel 14 may also be reduced, thereby reducing the flow area of ​​the flow channel 14.

[0057] In one possible implementation, from the edge of the filter screen 10 to the connection hole 11, along the extension direction of the flow channel 14, the width of multiple sections of the flow channel 14 can be reduced, so that the water flow is intermittently accelerated. This can reduce the deposition of food residue on the pipe wall of the flow channel 14, reduce the problem of the filter screen 10 being blocked by food residue, and thus improve the filtration efficiency.

[0058] The direction of extension of the flow channel 14 can be along a curve, an oblique line, or a zigzag line to guide the water flow along the flow channel 14.

[0059] In one possible implementation method, refer to Figure 3 , Figure 4 and Figure 5As shown, multiple guide portions 13 are arranged in a counterclockwise spiral from the edge of the filter screen 10 to the connecting hole 11, forming a first guide vein 16. In each first guide vein 16, a flow channel 14 is formed between two adjacent guide portions 13. The arrangement of multiple first guide veins 16 not only improves the structural strength of the filter screen 10, but also enhances the flow guiding effect.

[0060] The first guide vein 16 guides the water flow in a spiral shape. The rotating water flow can generate a self-cleaning flushing effect on the filter screen 10, washing away food residue and other particles attached to the filter screen 10, which helps prevent the mesh of the filter screen 10 from becoming clogged and reduces maintenance needs.

[0061] 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, multiple guides 13 are arranged in a counterclockwise spiral from the edge of the filter screen 10 to the connecting hole 11, forming a first guide network 16. This helps to synchronously guide food residues and other particles in the water flow into the filter cartridge assembly 20 installed in the connecting hole 11 with the water flow in a specific rotational pattern, thereby improving drainage efficiency.

[0062] In one possible implementation, the first guide vein 16 is arranged in a counterclockwise spiral from the edge of the filter screen 10 to the connection hole 11, with the connection hole 11 as the center. The counterclockwise spiral arrangement can be combined with the water flow direction of the spray system to use the Coriolis force to affect the movement path of the residue, enhance the concentration effect of the residue, reduce the residence time of the residue on the filter screen, and reduce clogging.

[0063] The Coriolis force is an inertial force caused by the Earth's rotation, affecting the path of moving objects. In this application, the Coriolis force is used to help change the movement path of food residue, making it easier to collect. Under the influence of the Coriolis force in the Northern Hemisphere, the water flow on the filter screen 10 rotates in a counterclockwise spiral direction. The side of the lower spray arm 40 facing the filter screen 10 has a spray hole, which 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 counterclockwise, which has a synergistic effect. This synergistic effect helps to push the food residue to the connection hole 11 of the filter screen 10, making the food residue easier to collect.

[0064] The filter structure and dishwasher provided in this application achieve a dual synergistic effect by having the first guide vein 16 arranged in a counterclockwise spiral shape, combined with the spray holes of the lower spray arm 40 spraying counterclockwise water flow, thereby improving the slag collection effect.

[0065] In one possible implementation, a plurality of first guide veins 16 are arranged at intervals around the periphery of the connecting hole 11, thereby guiding water flow in all directions around the periphery of the connecting hole 11.

[0066] In one possible implementation, along the extension direction of the first guide vein 16, from the edge of the filter screen 10 to the connecting hole 11, the spacing between two adjacent guide portions 13 gradually decreases. This facilitates a gradual reduction in the flow area of ​​the flow channel 14, thereby accelerating the water flow and improving filtration efficiency.

[0067] In one possible implementation, along the extension direction of the first guide vein 16, from the edge of the filter screen 10 to the connecting hole 11, the volume of the guide portion 13 gradually decreases, for example, the length, width or height of the guide portion 13 gradually decreases, which is conducive to the structure of the flow area of ​​the flow channel 14 becoming smaller, thereby accelerating the flow rate of water and improving the filtration efficiency.

[0068] In one possible implementation, the spacing between two adjacent first guide veins 16 is not equal to the spacing between two adjacent guide portions 13 within each first guide vein 16. For example, the spacing between two adjacent first guide veins 16 is greater than the spacing between two adjacent guide portions 13 within each first guide vein 16, or the spacing between two adjacent first guide veins 16 is less than the spacing between two adjacent guide portions 13 within each first guide vein 16. This structure allows for a smaller flow area in the flow channel 14, thereby accelerating water flow and improving filtration efficiency.

[0069] In one possible implementation (not shown in the figure), a plurality of guide portions 13 are arranged radially at intervals around the connection hole 11, forming a second guide network. The second guide network guides the flow direction and path of the water along the radial direction of the connection hole 11, helping the water flow to enter the filter cartridge assembly 20 installed inside the connection hole 11 more smoothly.

[0070] In one possible implementation (not shown in the figure), a plurality of second guide veins are arranged at intervals around the periphery of the connecting hole 11, thereby guiding water flow in all directions around the periphery of the connecting hole 11.

[0071] In one possible implementation, along the extension direction of the second guide vein, from the edge of the filter screen 10 to the connecting hole 11, the volume of the guide portion 13 gradually decreases. This structure facilitates a smaller flow area in the flow channel 14, thereby accelerating the water flow velocity and improving filtration efficiency.

[0072] In one possible implementation, the spacing between two adjacent second guide veins is not equal to the spacing between two adjacent guide portions 13 in each second guide vein. For example, the spacing between two adjacent second guide veins is greater than the spacing between two adjacent guide portions 13 in each second guide vein, or the spacing between two adjacent second guide veins is less than the spacing between two adjacent guide portions 13 in each second guide vein. This structure allows for a smaller flow area in the flow channel 14, thereby accelerating the water flow.

[0073] In one possible implementation, the guide portion 13 is a convex bulge protruding from the surface of the main body portion 12. A flow channel 14, which may be narrow or wide, is formed between the convex bulges to achieve the effect of narrow channel accelerating the filtration of food residue.

[0074] In one possible implementation, the guide portion 13 is conical or dome-shaped. The cross-sectional shape of the guide portion 13 can be circular, elliptical, polygonal, triangular, or other shapes.

[0075] In other possible implementations, the top surface of the guide portion 13 can be a flat surface or an arc surface, the edge of the guide portion 13 can be smoothly connected to the main body portion 12 through an arc chamfer, and a cavity is formed on the back side of the guide portion 13.

[0076] Since the filter screen 10 includes a main body 12 and a plurality of guide portions 13 disposed on the main body 12, and the guide portions 13 are protrusions protruding from the surface of the main body 12, such a structure can improve the structural strength of the filter screen 10, making the filter screen 10 less prone to deformation when subjected to external force, maintaining its shape and function, and significantly improving the overall stability and durability of the filter screen 10.

[0077] Both the main body 12 and the guide section 13 are equipped with filter meshes. When the water flow is large, it is difficult for the water to fall vertically through the filter meshes in both the main body 12 and the guide section 13 in time. Therefore, the water will be guided by the guide section 13 and flow along the flow channel 14.

[0078] In one possible implementation, the main body 12 is concave, and the connecting hole 11 is located at the lowest point of the main body 12. That is, the perimeter of the filter screen 10 is high, and the connecting hole 11 in the center of the filter screen 10 is slightly lower, which facilitates water flow and residue to more easily enter the connecting hole 11 located at the lowest point.

[0079] Depending on the usage requirements, the filter screen 10 can be round or rectangular, used to filter the wastewater after washing the dishes inside the inner liner.

[0080] In one possible implementation, the filter screen 10 can be a one-piece molded plastic part or a metal material, such as a stainless steel filter screen or filter plate, which helps to ensure the structural strength of the filter screen 10 itself.

[0081] refer to Figure 4 and Figure 5 As shown, the water flows along the water flow path B. The flow passage 14 between the guide parts 13 in each first guide vein 16 is referenced at the first position C; the flow passage 14 between the guide parts 13 in two adjacent first guide veins 16 is referenced at the second position D. The width at the first position C is smaller than the width at the second position D, indicating that when the water flows from the second position D to the first position C, the flow area of ​​the flow passage 14 becomes smaller, the water flow speed increases, and more water can be filtered per unit time, thus effectively improving the filtration efficiency.

[0082] This application also provides a dishwasher, including the above-described filter structure.

[0083] refer to Figure 4 and Figure 6 As shown, the dishwasher includes an inner tub with an inner tub bottom plate 30. The inner tub bottom 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 bottom plate 30. A filter screen 10 is disposed on the groove formed in the inner tub bottom plate 30.

[0084] 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.

[0085] refer to Figure 6 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.

[0086] A fixed base 50 is fixedly connected to the water cup. The fixed base 50 has water passage holes extending through its top and bottom, with the lower end of the water passage holes connected to the water cup. A lower spray arm 40 is positioned above the fixed base 50 and rotatably connected to it. A connecting hole 11 is located below the lower spray arm 40. The spray holes on the lower spray arm 40 spray water obliquely outward, causing the water flow to rotate along the spray direction. Under the dual action of spray collection and the Coriolis force principle, the filter screen 10 collects food residue counterclockwise, improving the collection efficiency.

[0087] In this embodiment, the filter screen 10 is provided with a notch 15 for the fixing seat 50 to pass through. The notch 15 may be located on one side of the filter cartridge assembly 20. 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.

[0088] The other structural details of the dishwasher are similar to those in the existing design and will not be described in detail here.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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) is provided with a connection hole (11) for installing a filter cartridge assembly (20). The filter screen (10) includes a main body (12) and a plurality of guide parts (13) disposed on the main body (12). A flow passage (14) is formed between two adjacent guide parts (13). From the edge of the filter screen (10) to the connection hole (11), along the extension direction of the flow channel (14), at least part of the flow area of ​​the flow channel (14) decreases.

2. The filter structure according to claim 1, characterized in that, From the edge of the filter (10) to the connection hole (11), along the extension direction of the flow channel (14), at least part of the width of the flow channel (14) decreases.

3. The filter structure according to claim 1, characterized in that, The plurality of guide portions (13) are arranged in a counterclockwise spiral from the edge of the filter screen (10) to the connecting hole (11), forming a first guide vein (16); or, Multiple guide portions (13) are arranged radially at intervals around the connecting hole (11) to form a second guide network.

4. The filter structure according to claim 3, characterized in that, Multiple first guide veins (16) are arranged at intervals around the periphery of the connecting hole (11); or, Multiple second guide veins are arranged at intervals around the periphery of the connection hole (11).

5. The filter structure according to claim 3, characterized in that, Along the extension direction of the first guide vein (16) or the second guide vein, from the edge of the filter (10) to the connecting hole (11), the distance between two adjacent guide portions (13) gradually decreases.

6. The filter structure according to claim 3, characterized in that, The spacing between two adjacent first guide veins (16) is not equal to the spacing between two adjacent guide portions (13) in each first guide vein (16); or, The spacing between two adjacent second guide veins is not equal to the spacing between two adjacent guide portions (13) in each second guide vein.

7. The filter structure according to any one of claims 1-5, characterized in that, The guide portion (13) is a protrusion that protrudes from the surface of the main body portion (12).

8. The filter structure according to claim 6, characterized in that, The guide part (13) is circular or elliptical.

9. The filter structure according to any one of claims 1-5, characterized in that, Both the main body (12) and the guide (13) are provided with filter mesh.

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

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