Dishwasher filter and dishwasher

Abstract

This utility model discloses a filtration device for a dishwasher and a dishwasher. The filtration device includes a water collection shell, a filter, and a push-suction component. The water collection shell has a water collection cavity with a water inlet at the top. The filter is disposed in the water collection cavity, dividing the water collection cavity into an inner filter cavity and an annular outer cavity surrounding the outer periphery of the inner filter cavity. One of the inner filter cavity and the annular outer cavity is connected to the water inlet. The push-suction component is rotatably disposed in the other of the inner filter cavity and the annular outer cavity relative to the water collection shell. The push-suction component includes a rotating shaft and a push-suction blade connected to the rotating shaft. The push-suction blade includes a push surface and a suction surface disposed opposite to each other along the direction of rotation of the push-suction component. The free end of the push-suction blade adjacent to the filter also has a water-blocking surface that is disposed opposite to the filter and adapted in shape. The water-blocking surface is connected between the push surface and the suction surface. The water-blocking surface of this application can suppress backflow, thereby increasing the negative pressure effect and improving the water absorption effect of the suction surface.

Description

Technical Field

[0001] This invention relates to the field of kitchen equipment technology, and in particular to a filter device and a dishwasher. Background Technology

[0002] In related technologies, dishwashers typically pump water into the spray unit via a water pump. The spray unit then rotates and sprays water onto the items being cleaned, using the scouring force of the water flow and the centrifugal force generated by the rotation to clean the dishes. Over time, food residue accumulates on the filter. As the residue accumulates, it directly affects the water pump's pumping capacity, which in turn affects the water pressure of the spray unit, thus reducing the dishwasher's cleaning effect. Utility Model Content

[0003] This application provides a filter device for a dishwasher and a dishwasher. The filter device has a water-blocking surface in the push-suction blade, which can prevent the water flow from flowing back immediately after being pushed out by the push-suction surface, thereby suppressing backflow and enhancing the negative pressure effect and improving the water absorption effect of the suction surface.

[0004] In a first aspect, embodiments of this application provide a filtration device for a dishwasher, comprising: A water collection shell has a water collection cavity, and the top of the water collection cavity has a water inlet; A filter is disposed within the water collection chamber, dividing the water collection chamber into an inner filter cavity and an annular outer cavity surrounding the outer periphery of the inner filter cavity. One of the inner filter cavity and the annular outer cavity communicates with the water inlet. A push-suction water element is rotatably disposed in the inner cavity of the filter and the other of the annular outer cavity relative to the water collection shell. The push-suction water element includes a rotating shaft and a push-suction water blade connected to the rotating shaft to rotate with the rotating shaft. The push-suction water blade includes a push surface and a suction surface disposed opposite to each other along the direction of rotation of the push-suction water element. During the rotation of the push surface, there is a radial component of the pushing force on the water. During the rotation of the suction surface, there is a radial component of the suction force on the water. The free end of the push-suction water blade adjacent to the filter also has a water-blocking surface disposed opposite to the filter and adapted in shape. The water-blocking surface is connected between the push surface and the suction surface.

[0005] In some embodiments, the water-retaining surface is a plane; or, The water-blocking surface is curved and protrudes in the direction toward the filter.

[0006] In some embodiments, the central axis of the water-blocking surface is parallel to the central axis of the filter in the direction of the push-suction component's rotation.

[0007] In some embodiments, the horizontal cross-section of the water-blocking surface is an arc, and the distance between the arc and the inner surface of the filter is equidistant in the radial direction of the filter.

[0008] In some embodiments, the distance between the water-blocking surface and the inner surface of the filter in the radial direction is not less than 0 mm and not more than 3 mm.

[0009] In some embodiments, the water-retaining surface satisfies one of the following conditions: The top and bottom of the water-blocking surface are flush with the top and bottom of the water-pushing surface, respectively. The top and bottom of the water-blocking surface are flush with the top and bottom of the water-absorbing surface, respectively. The height of the water-blocking surface is not less than half the height of the filter.

[0010] In some embodiments, a high-pressure zone is formed between the water-pushing surface and the opposite portion of the filter, a low-pressure zone is formed between the water-absorbing surface and the opposite portion of the filter, and a level-pressure zone is formed between the water-blocking surface and the opposite portion of the filter, with the water pressure decreasing sequentially in the high-pressure zone, the level-pressure zone, and the low-pressure zone.

[0011] In some embodiments, in the rotational direction of the push-suction element, the push surface is located in front of the suction surface, and the distance between the push surface and the adjacent portion of the filter gradually increases.

[0012] In some embodiments, the water-blocking surface has a third projection on the inner surface of the filter along the radial direction of the filter, and the area of ​​the cylindrical filter screen at least covered by the third projection constitutes a water-blocking area, with two adjacent water-blocking areas spaced apart in the circumferential direction of the filter.

[0013] In some embodiments, the circumferential spacing between two adjacent water-blocking areas of the filter is no greater than 100 mm and no less than 5 mm.

[0014] In some embodiments, along the circumference of the filter, the pushing surface has a first projection on the inner surface of the filter, and the area of ​​the filter at least covered by the first projection constitutes the pushing area; the suction surface has a second projection on the inner surface of the filter, and the filter constitutes the suction area behind the second projection along the direction of the pushing and suction element. The area between two adjacent water-pushing areas constitutes at least a water-absorbing area, and the ratio of the area of ​​one water-absorbing area to the area of ​​one water-pushing area is not less than 1 and not greater than 5.

[0015] In some embodiments, the arc lengths of the radial projections of the water-pushing surface and the water-blocking surface onto the filter are a and d, respectively, where 0.8 ≤ a / d ≤ 1.2.

[0016] In some embodiments, the arc lengths of the water-pushing surface, the water-absorbing surface, and the radial projection of the water-pushing and water-absorbing blades onto the filter are a, b, and c, respectively, where 0.5 ≤ a / c ≤ 1 and 0.5 ≤ b / c ≤ 1.

[0017] In some embodiments, the filter is cylindrical, and on the radial section of the filter, one radial line of the filter has a first intersection point with the end of the water-pushing surface near the filter, and a second intersection point with the filter. A first ray and a second ray are formed from the first intersection point and the second intersection point as endpoints, respectively, and the included angle between the first ray and the second ray is θ1. The first ray is tangent to or parallel to the water-pushing surface and extends away from the second intersection point; the second ray is tangent to the filter and extends in the rotation direction of the water-pushing component, with 20°≤θ1≤150°.

[0018] In some embodiments, the water-pushing surface is a plane; or, The water-pushing surface is curved and recessed relative to the water-absorbing surface.

[0019] In some embodiments, the absorbent surface is a plane; or, The absorbent surface is curved; or... The water-absorbing surface includes a first water-absorbing area and a second water-absorbing area that are set at an angle, and the angle formed by the first water-absorbing area and the second water-absorbing area is oriented away from the rotation direction of the push-suction component.

[0020] Secondly, embodiments of this application provide a dishwasher, comprising: Such as the filtration device described above; The inner tank has a washing chamber that communicates with the water collection chamber; A circulating pump is connected to one of the filter inner cavity and the annular outer cavity; and The drain pump is connected to the inner cavity of the filter and another part of the annular outer cavity.

[0021] In this application, the push-suction impeller includes a push surface and a suction surface arranged opposite to each other along the rotation direction of the push-suction component. During rotation, the push surface exerts a radial component of its thrust on the water. This component pushes the water in the purification chamber towards the circulating water outlet, increasing the water flow velocity and pressure, ensuring the circulating pump can smoothly extract sufficient water. During rotation, the suction surface exerts a radial component of its suction on the water. This component attracts surrounding water towards the push-suction impeller, enhancing the water circulation effect and allowing the water in the purification chamber to flow more evenly, avoiding localized water flow obstruction. The push-suction impeller generates both thrust and suction simultaneously during rotation, achieving bidirectional water flow control. Furthermore, the free end of the push-suction impeller adjacent to the filter has a water-blocking surface that is opposite to the filter and adapted in shape. This water-blocking surface connects the push surface and the suction surface, preventing water from immediately flowing back after the push surface is pushed out, suppressing backflow, thereby increasing the negative pressure and improving the suction effect of the suction surface. Specifically, without a water-blocking surface, the water pushed out by the pusher surface may quickly flow back due to pressure changes, easily causing chaotic water flow and affecting the overall working efficiency of the pusher and suction components. The water-blocking surface suppresses backflow, allowing the water pushed out by the pusher surface to more effectively flush away residue on the column filter screen, improving the flushing effect. Simultaneously, the water-blocking surface also increases the negative pressure. Because it blocks some backflow, the low-pressure area around the suction surface becomes more pronounced, increasing the negative pressure and further enhancing the suction capacity of the suction surface. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a filtration device provided in an embodiment of this application; Figure 2 This is an exploded view of a filtration device provided in an embodiment of this application; Figure 3 This is a cross-sectional schematic diagram of a filtering device provided in an embodiment of this application; Figure 4 This is a cross-sectional view of a filtering device provided in an embodiment of this application from another angle; Figure 5 A top view schematic diagram of a push-suction blade installed inside a filter, provided as an embodiment of this application; Figure 6A top view of another embodiment of the present application, showing the push-suction blades installed inside the filter; Figure 7 A schematic diagram of the structure of a push-suction blade provided in an embodiment of this application; Figure 8 A schematic diagram of the structure of the push-suction blade in another embodiment provided in this application; Figure 9 A front view of the push-suction blades of another embodiment provided in this application; Figure 10 This is a schematic diagram of the structure of the push-suction blade in another embodiment of the present application.

[0024] Explanation of icon numbers: 100. Filtering device; 1. Water collection shell; 11. Water cup body; 11a. Water inlet; 11b. Water collection chamber; 11c. Filter inner chamber; 11d. Annular outer chamber; 11i. Outer chamber outlet; 11j. Inner chamber outlet; 12. Drain pipe; 13. Circulating water connection pipe; 21. Filter; 211. Top sealing cap; 212. Cylindrical filter screen; 2121. Water pushing area; 2122. Water suction area; 2123. Water blocking area; 2124. Second intersection point; 2125. Second ray; 3. Water-suction pusher; 31. Rotating shaft; 311. Top end; 32. Water-suction pusher blade; 331. Water-pushing surface; 3311. High-pressure zone; 3312. First projection; 3313. First intersection point; 3314. First ray; 332. Water-suction surface; 3321. Low-pressure zone; 3322. Second projection; 3323. First water-suction zone; 3324. Second water-suction zone; 333. Water-blocking surface; 3331. Flat pressure zone; 3332. Third projection; 36. Connector; 361. Spoke; 3611. Bottom surface; 3612. Top surface; 4. Drive assembly; 42. First drive component; 41. Drive shaft.

[0025] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0027] Where the following description relates to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0028] In the description of this invention, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances. Furthermore, in the description of this invention, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] This application provides a dishwasher, which includes a housing and an inner tub, spray nozzles, a circulation pump, a drain pump, and a filter device 100 disposed within the housing (see...). Figure 1 ).

[0031] The inner tank defines a washing chamber, which can be equipped with shelves for placing tableware and other items to be washed, providing a stable placement for the tableware and ensuring it does not move during the washing process. The washing chamber also features spray nozzles for spraying washing water onto the items. These nozzles spray water at specific angles and pressures, effectively covering the surface of the tableware and removing stains. A filter device 100 is located at the bottom of the inner tank, and its inlet 11a connects to the washing chamber, allowing water from the washing chamber to flow naturally into the filter device for further treatment. The spray nozzles rotate and spray the items, utilizing the scouring force of the water flow and the centrifugal force generated by the rotation to thoroughly and efficiently clean the tableware. After washing, the washing water collects at the filter device 100 under gravity and is filtered to remove food residue and other impurities.

[0032] Optionally, the spray system may include an upper spray arm, a middle spray arm, and a lower spray arm disposed within the inner tub. A circulation pump guides water from the filter unit 100 to the lower spray arm, which is primarily responsible for powerfully cleaning dishes placed on the lower shelf. When the middle and upper spray arms need to spray water, water flowing from the circulation pump can be directed to them via water pipes. The middle spray arm can clean dishes on the middle or both upper and lower shelves, while the upper spray arm sprays dishes on the upper shelf, thus meeting the dishwasher's different washing needs for dishes in different locations and quantities. The water pipes can be located on the inner wall of the inner tub and extend vertically; this design saves space while ensuring smooth water delivery to each spray arm.

[0033] The filter device 100 is equipped with a circulating water outlet and a drain outlet, with the circulating water outlet connected to a circulating pump. The circulating pump draws water from the filter device 100. When the circulating pump draws water from the water collection shell 1 (the part of the filter device used to collect water), the washing water needs to be filtered by the filter device 100 first to effectively filter out food residue, preventing it from entering the circulating pump and extending its service life. The circulating pump can also draw the relatively clean water after filtration to the spray nozzles for cyclical washing of the tableware, improving the washing effect and making the tableware cleaner. The drain pump is connected to the drain outlet. After washing, the drain pump generates strong suction to discharge wastewater and residue from the washing chamber, keeping the washing chamber clean.

[0034] Please see Figures 1 to 3 The filtration device 100 includes a water collection shell 1, a filter 21, and a push-suction water element 3.

[0035] The water collection shell 1 can be, for example, a water cup, or any other shell disposed within the water cup. The water collection shell 1 has a water collection cavity 11b, with an inlet 11a at the top of the cavity. This inlet 11a connects to the washing chamber and is used to receive wastewater flowing down from the washing chamber. The filter 21 can be, for example, a cylindrical filter, a conical filter, or other types of filter 21. The filter 21 is disposed within the water collection cavity 11b, dividing the cavity into an inner filter cavity 11c and an annular outer cavity 11d surrounding the inner filter cavity 11c. The water collection shell 1 has an outer cavity outlet 11i connecting to the annular outer cavity 11d and an inner cavity outlet 11j connecting to the inner filter cavity 11c. One of the outer cavity outlet 11i and the inner filter cavity 11c is a drain outlet, and the other is a circulating water outlet. One of the inner filter cavity 11c and the annular outer cavity 11d communicates with the inlet 11a. The cavity connected to the inlet 11a can be understood as a wastewater cavity, used to directly receive wastewater containing food residue flowing down from the washing cavity. Therefore, the water quality in the wastewater cavity is relatively poor. At the same time, the wastewater cavity is connected to the drain outlet, which facilitates the discharge of wastewater and residue. Another cavity in the filter inner cavity 11c and the annular outer cavity 11d can be understood as a purified water cavity after filtration. The purified water cavity is connected to the circulating water outlet. The relatively clean water after filtration by the filter 21 enters the purified water cavity and is then drawn by the circulating pump to the spray unit through the circulating water outlet for circulating cleaning of tableware.

[0036] The water collection shell 1 may include a water cup body 11, a drain pipe 12, and a circulating water connection pipe 13. The water cup body 11 is provided with a water collection cavity 11b. The drain pipe 12 and the circulating water connection pipe 13 are connected to the water cup body 11, and the drain pipe 12 is connected to the drain outlet, while the circulating water connection pipe 13 is connected to the circulating water outlet. Optionally, the water collection shell 1 is a one-piece molded component, which simplifies the installation of the water cup body 11, the drain pipe 12, and the circulating water connection pipe 13, and improves the airtightness of the connection between the water collection cavity 11b and the drain outlet and the circulating water outlet.

[0037] For example, the annular outer cavity 11d is connected to the inlet 11a and the outlet, and the filter inner cavity 11c is connected to the circulating water outlet. Wastewater first enters the annular outer cavity 11d, and after being filtered by the filter 21, most of the residue is left in the annular outer cavity 11d. Relatively clean water enters the filter inner cavity 11c and is then recycled through the circulating water outlet. After the circulation cleaning is completed, the wastewater and residue in the annular outer cavity 11d are discharged through the outlet.

[0038] It should be noted that the purified water in the purification chamber contains relatively less residue compared to the water in the wastewater chamber, but this does not mean that the water in the purification chamber is completely pure and free of impurities. In actual use, the purified water in the purification chamber may still contain some tiny particles or dissolved stains. However, these tiny impurities have little impact on the circulation pump and will not have a significant adverse effect on the circulating cleaning effect of the tableware.

[0039] Please refer to section 2. The filter 21 may include a cylindrical filter screen 212, which is cylindrical and can be coaxially arranged with the water collection shell 1. When the pore size of the cylindrical filter screen 212 is small, it can intercept more tiny particles of residue. For example, for some small food scraps, fibers, and other impurities, the small-pore cylindrical filter screen 212 can effectively block them on the outside of the filter screen, making the water passing through the cylindrical filter screen 212 cleaner, thereby significantly improving the filtration effect and meeting the demand for high-precision filtration of washing water. However, with the increase of washing times, a large amount of residue will continuously accumulate on the surface of the cylindrical filter screen 212. For example, the filter pore size of the cylindrical filter screen 212 in this application can be 2mm, 3mm, 4mm, 5mm, etc. Due to the small filter pore size, residue is more likely to embed or block the filter pores of the cylindrical filter screen 212, resulting in a gradual reduction in the effective flow area of ​​the filter pores. This will not only reduce the speed at which water flows through the cylindrical filter screen 212, causing a significant drop in filtration efficiency, but may also affect the normal operation of the filtration system and even lead to equipment failure.

[0040] To prevent residue from clogging the filter holes of the cylindrical filter screen 212 and to ensure the continuous and stable operation of the filtration system, this application provides a push-suction water element 3 inside the water collection shell 1. The push-suction water element 3 is rotatably disposed relative to the water collection shell 1 in another part of the filter inner cavity 11c and the annular outer cavity 11d (i.e., the clean water cavity). The push-suction water element 3 rotates, causing the water to rotate and forming a water flow with a certain momentum and direction. When the push-suction water element 3 rotates, it exerts a force on the surrounding water, causing the water to rotate. This rotating water flow can directly act on the residue on the cylindrical filter screen 212. Under the continuous scouring of the water flow, the residue adhering to the surface of the filter screen will be washed away, preventing it from remaining and accumulating on the filter screen for a long time, thus effectively avoiding clogging of the filter holes.

[0041] When the push-suction water component 3 pushes water from the clean water chamber into the wastewater chamber to flush the residue on the cylindrical filter screen 212, the water in the wastewater chamber simultaneously flows back into the clean water chamber to meet the working requirements of the circulating water pump. In order to improve the efficiency of water flowing back from the wastewater chamber to the clean water chamber, this application has made further improvements to the push-suction water component 3. The structure and working principle of the improved push-suction water component 3 will be described in detail below.

[0042] Please refer to the following: Figure 4 and Figure 7The push-suction component 3 includes a rotating shaft 31 and a push-suction blade 32 connected to the rotating shaft 31 to rotate with the rotating shaft 31. The rotating shaft 31, as the core support and rotating component of the push-suction component 3, can be made of high-strength and corrosion-resistant materials to ensure stability during long-term high-speed rotation without deformation or damage. The rotating shaft 31 can obtain rotational power by connecting to the drive component 4 (such as a motor) and transmit the power to the push-suction blade 32 so that it can rotate at a predetermined speed and direction.

[0043] Please see Figure 7 The push-suction impeller 32 includes a push surface 331 and a suction surface 332 arranged opposite to each other along the direction of rotation of the push-suction component 3. During the rotation of the push surface 331, the pushing force on the water has a radial component. This component can push the water in the clean water chamber to the wastewater chamber, thereby flushing the residue on the cylindrical filter screen 212 and ensuring that the cylindrical filter screen 212 can work normally. During the rotation of the suction surface 332, the suction force on the water has a radial component. This component can attract the water in the wastewater chamber to flow back to the clean water chamber after being filtered by the cylindrical filter screen 212, meeting the working requirements of the circulating water pump.

[0044] Furthermore, the free end of the push-suction blade 32 adjacent to the filter 21 also has a water-blocking surface 333 that is opposite to the filter 21 and adapted in shape. The water-blocking surface 333 connects the push surface 331 and the suction surface 332. The water-blocking surface 333 can prevent the water flow from immediately flowing back after the push surface 331 is pushed out, suppressing backflow, thereby increasing the negative pressure and improving the water absorption of the suction surface 332. Specifically, if the water-blocking surface 333 is not provided, the water pushed out by the push surface 331 may, due to pressure changes and other reasons, cause the water in the sewage chamber to quickly flow back to the clean water chamber from the end of the push surface 331, which can easily lead to chaotic water flow and affect the overall working efficiency of the push-suction component 3. The water-blocking surface 333 can suppress backflow, allowing the water pushed out by the push surface 331 to more concentratedly flush the residue on the column filter screen 212, improving the flushing effect. At the same time, the water-blocking surface 333 can also increase the negative pressure. Because the water-blocking surface 333 blocks part of the return water, the low-pressure effect around the water-absorbing surface 332 becomes more pronounced, and the negative pressure increases. This further enhances the water absorption capacity of the water-absorbing surface 332.

[0045] Please see Figure 5 In some embodiments, the water-retaining surface 333 is flat, which simplifies the structure and eliminates the need for complex molds and processing techniques during manufacturing. Over long-term use, some residue and scale may accumulate on the water-retaining surface 333. The flat surface of the water-retaining surface 333 is smooth, without dead corners or depressions, making cleaning easier.

[0046] Please see Figure 5In some embodiments, the central axis of the water-blocking surface 333 is parallel to the central axis of the filter 21 in the direction of the water-pushing component 3. This can effectively block the backflow of water. The water-blocking surface 333 has a simple structure and is easy to manufacture. For example, when the water-blocking surface 333 is formed by injection molding, it is easier to demold.

[0047] Please see Figure 6 In some embodiments, the water-retaining surface 333 is curved and protrudes in the direction towards the filter 21. When the water flows over the water-retaining surface 333, it flows closer to the curved surface of the cylindrical filter screen 12, reducing friction and collision between the water flow and the water-retaining surface 333, reducing water flow resistance, and reducing energy loss. When the water flow comes into contact with the curved water-retaining surface 333, the curve allows the water flow to transition more smoothly, avoiding the strong vibration and noise generated when the water flow collides with the flat water-retaining surface 333.

[0048] Please see Figure 6 In some embodiments, the horizontal cross-section of the water-blocking surface 333 is an arc, and the distance between the arc and the inner surface of the filter 21 is equidistant everywhere in the radial direction of the filter 21. Because the distance between the arc and the inner surface of the filter 21 is equidistant everywhere, when the water flows through the water-blocking surface 333, a water flow layer of uniform thickness can be formed between the filter 21 and the water-blocking surface 333. This can effectively prevent water backflow while the pressure tends to be even, making the water flow more stable.

[0049] In some embodiments, the distance between the water-retaining surface 333 and the surface of the filter 21 in the radial direction is not less than 0 mm and not more than 3 mm. This allows a stable water flow layer to be formed between the filter 21 and the water-retaining surface 333. When water flows past the water-retaining surface 333, it can flow at a relatively stable speed and direction, reducing turbulence and disturbance, lowering the scouring force of the water flow on the filter, and extending the service life of the filter.

[0050] Please return to the reference. Figure 3 In some embodiments, the height of the water-blocking surface 333 is not less than half the height of the filter 21. A higher water-blocking surface 333 can more effectively block and change the direction of water flow. When water flows over the water-blocking surface 333, a higher water-blocking surface 333 can provide a larger blocking area, allowing the water flow to change its direction more fully.

[0051] Please see Figure 7In some embodiments, the top and bottom of the water-blocking surface 333 are flush with the top and bottom of the water-pushing surface 331, respectively. That is, the water-blocking surface 333 and the water-pushing surface 331 are at the same height. Along the rotation direction of the push-suction blade 32, the rear side of any position of the water-pushing surface 331 is the water-blocking surface 333, effectively separating the water-pushing surface 331 and the water-blocking surface 333. This allows the water-pushing surface 331 to effectively push water, and the water-blocking surface 333 to effectively block water, avoiding water flow turbulence. During the water pushing process, the water flow can flow smoothly along the surface of the push-suction component 3, reducing turbulence and energy loss generated at the junction of the water flow.

[0052] Please see Figure 7 In some embodiments, the top and bottom of the water-blocking surface 333 are flush with the top and bottom of the water-absorbing surface 332, respectively. That is, the water-blocking surface 333 and the water-absorbing surface 332 are at the same height. Along the radial direction of the push-suction blade 32, the rear side of any position of the water-blocking surface 333 is the water-absorbing surface 332, thereby effectively dividing the water-blocking surface 333 and the water-absorbing surface 332, so that the water-blocking surface 333 effectively blocks water and the water-absorbing surface 332 effectively absorbs water, thus avoiding water flow turbulence.

[0053] Please see Figures 4 to 6 In some embodiments, a high-pressure zone 3311 is formed between the water-pushing surface 331 and the opposite part of the filter 21, a low-pressure zone 3321 is formed between the water-absorbing surface 332 and the opposite part of the filter 21, and a flat-pressure zone 3331 is formed between the water-blocking surface 333 and the opposite part of the filter 21. The water pressure at the high-pressure zone 3311, the flat-pressure zone 3331 and the low-pressure zone 3321 decreases sequentially.

[0054] The high-speed water flow generated in the high-pressure zone 3311 has a powerful scouring force, which can more effectively wash away the residue on the surface of the cylindrical filter screen 212, quickly removing larger food particles attached to the filter screen. Simultaneously, the high-pressure water flow carries these residues along its course. When the water flows into the flat-pressure zone 3331, the flow velocity gradually decreases. Upon entering the low-pressure zone 3321, the water can flow back through negative pressure. This orderly distribution of water pressure allows the water flow to contact the cylindrical filter screen 212 at a more optimal speed and direction.

[0055] The high-pressure zone 3311 ensures sufficient force for the water flow to wash over the cylindrical filter screen 212, the level-pressure zone 3331 allows for a smooth transition of the water flow, and the low-pressure zone 3321 guides the water flow from the sewage chamber into the clean water chamber, achieving the function of filtering sewage. The formation of the high-pressure zone 3311, level-pressure zone 3331, and low-pressure zone 3321 guides the water flow to circulate along a specific path. The water flow in the high-pressure zone 3311 diffuses into the sewage chamber, and after being buffered by the level-pressure zone 3331, flows smoothly into the low-pressure zone 3321, forming a complete and orderly water flow circulation system. This reduces water flow turbulence and energy loss, allowing the water flow to circulate more efficiently within the water collection chamber 11b. This improves the uniformity and stability of the water flow circulation.

[0056] This embodiment can balance the water pressure in the water collection chamber 11b, avoiding equipment vibration and instability caused by excessive or insufficient local pressure. The cooperation between the high-pressure zone 3311, the equal-pressure zone 3331, and the low-pressure zone 3321 allows the water pressure to change gradually during circulation, reducing the impact of sudden pressure changes on the equipment and improving the stability and reliability of the entire filtration device 100.

[0057] In some embodiments, in the rotation direction of the push-suction member 3, the push surface 331 is located in front of the suction surface 332, and the distance between the push surface 331 and the adjacent portion of the filter 21 gradually increases. The push surface 331, located in front of the suction surface 332, first pushes the water in the clean water chamber towards the wastewater chamber during rotation. As the distance between the push surface 331 and the filter 21 gradually increases, it exerts a squeezing and pushing effect on the water during rotation, causing the water pressure to gradually increase and the flow rate to accelerate. This accelerated water flow can more powerfully flush the cylindrical filter screen 212, more effectively removing residues adhering to the surface of the cylindrical filter screen 212. Simultaneously, the gradually increasing distance design helps to form a relatively stable high-pressure zone 3311 between the push surface 331 and the filter 21.

[0058] Optionally, the water-pushing surface 331 can be a flat surface; or, the water-pushing surface 331 can be a curved surface, and can be recessed relative to the water-absorbing surface 332. Both methods can achieve the water-pushing effect, and this application does not impose any restrictions on this.

[0059] Please see Figure 5 In some embodiments, along the radial direction of the filter 21, the water-blocking surface 333 has a third projection 3332 on the inner surface of the filter 21. The area on the cylindrical filter screen 212 covered by at least the third projection 3332 constitutes the water-blocking area 2123. Adjacent water-blocking areas 2123 are spaced apart in the circumferential direction of the cylindrical filter screen 212, so that the water flow is blocked and guided differently in different areas. This spaced distribution avoids excessive concentration of water flow in a certain area or the formation of dead flow corners, ensuring that the water flow can flow evenly through all parts of the cylindrical filter screen 212, expanding the effective coverage of filtration and improving the overall filtration efficiency.

[0060] In some embodiments, the circumferential spacing between two adjacent water-blocking areas 2123 on the cylindrical filter screen 212 is no greater than 100 mm and no less than 5 mm. This ensures that there is sufficient space between adjacent water-blocking areas 2123 for water to pass through smoothly, while avoiding spacing that is too small or too large. If the spacing is too small, the water flow will be significantly obstructed; if the spacing is too large, the water flow will be dispersed, both of which can easily lead to a reduction in water intake efficiency.

[0061] Please see Figure 5In some embodiments, along the circumference of the filter 21, the pushing surface 331 has a first projection 3312 on the inner surface of the filter 21, and the area of ​​the filter 21 at least covered by the first projection 3312 constitutes the pushing area 2121. The suction surface 332 has a second projection 3322 on the inner surface of the filter 21, and the filter 21 forms the suction area 2122 behind the second projection 3322 along the direction of the push-suction member 3. The area between two adjacent pushing areas 2121 at least partially constitutes the suction area 2122, and the ratio of the area of ​​a suction area 2122 to the area of ​​a pushing area 2121 is not less than 1 and not greater than 5. This helps to maintain a suitable water flow rate. If the water absorption area 2122 is too small, the water absorption capacity is insufficient, and too little sewage flows into the water inlet chamber, resulting in a poor filtration effect. If the water absorption area 2122 is too large, the water absorption speed is too fast, making it difficult for the push surface 331 to push the clean water into the sewage chamber, resulting in a poor flushing effect on the food residue on the column filter screen 212.

[0062] In some embodiments, the radial projections of the water-pushing surface 331 and the water-blocking surface 333 onto the filter 21 have arc lengths of a and d, respectively, where 0.8 ≤ a / d ≤ 1.2. The fact that the projected arc length a of the water-pushing surface 331 and the projected arc length d of the water-blocking surface 333 satisfy 0.8 ≤ a / d ≤ 1.2 means that their projected arc lengths are relatively close, allowing the water-pushing surface 331 to push the water flow to flush the cylindrical filter screen 212 and the water-blocking surface 333 to block the backflow of water to achieve a relatively balanced state. If the two are out of proportion, for example, if the projected arc length of the water-pushing surface 331 is too long and the projected arc length of the water-blocking surface 333 is too short, the water-pushing efficiency will be too high and the water-blocking effect of the water-blocking surface 333 will be small, causing a sudden drop in water pressure, turbulent water flow, and affecting the filtration effect. On the other hand, if the projected arc length of the water-blocking surface 333 is too long, it may excessively block the water flow into the water inlet chamber. In this embodiment, the projected arc lengths of the water-pushing surface 331 and the water-blocking surface 333 are set to be in a relatively close ratio, so that the water flow can effectively flush the cylindrical filter screen 212 first, and then be effectively blocked by the water-blocking surface 333 from flowing back to the clean water chamber too quickly.

[0063] In some embodiments, the arc lengths of the radial projections of the pushing surface 331, the suction surface 332, and the pushing / suction blade 32 onto the filter 21 are a, b, and c, respectively, where 0.5 ≤ a / c ≤ 1 and 0.5 ≤ b / c ≤ 1. The arc lengths a (projected from the pushing surface 331), b (projected from the suction surface 332), and c (projected from the pushing / suction blade 32) satisfy 0.5 ≤ a / c ≤ 1 and 0.5 ≤ b / c ≤ 1. Thus, the pushing surface 331 pushes the water flow to generate thrust, effectively pushing away residues attached to the cylindrical filter screen 212. The suction surface 332 generates negative pressure, drawing in water. The appropriate ratio of their arc lengths ensures coordinated pushing and suction processes, allowing the water to flow orderly within the filter device 1 and improving overall filtration efficiency.

[0064] Please see Figure 6 In some embodiments, the filter 21 is cylindrical, that is, the cylindrical filter screen 212 is cylindrical. On the radial section of the cylindrical filter screen 212, one radial line of the cylindrical filter screen 212 has a first intersection point 3313 with the end of the cylindrical filter screen 212 adjacent to the water pushing surface 331, and a second intersection point 2124 with the cylindrical filter screen 212. A first ray 3314 and a second ray 2125 are formed from the first intersection point 3313 and the second intersection point 2124, respectively. The included angle between the first ray 3314 and the second ray 2125 is θ1. The first ray 3314 is tangent to (when the water pushing surface 331 is curved) or parallel to (when the water pushing surface 331 is flat) the water pushing surface 331 and extends in a direction away from the second intersection point 2124. The second ray 2125 is tangent to the cylindrical filter screen 212 and extends in the rotation direction of the water pushing and suction member 3. 20°≤θ1≤150°. For example, θ1 can be in the form of 20°, 45°, 60°, 90°, 120°, 150°, etc.

[0065] In this example, the first ray 3314 is formed by the tangent at the end of the water-pushing surface 331 extending in a specific direction, specifically in a direction away from the second intersection point 2124; the second ray 2125 is formed by the tangent at a point on the cylindrical filter screen 212 adjacent to the end of the water-pushing surface 331 extending in a specific direction, in the direction of rotation of the water-pushing suction member 3. In this embodiment, θ1 is set to the aforementioned angle, so that the water flow can be pushed into the sewage chamber according to the preset angle, and the scouring force of the water flow on the cylindrical filter screen 212 can be adjusted according to the set angle. This application does not impose specific limitations on this.

[0066] Optionally, the absorbent surface 332 is an inclined plane; or, the absorbent surface 332 is a curved surface; or, please refer to [link to relevant documentation]. Figure 7 The absorbent surface 332 includes a first absorbent area 3323 and a second absorbent area 3324 arranged at an angle, with the angle between the first absorbent area 3323 and the second absorbent area 3324 pointing away from the rotation direction of the push-suction member 3. The first absorbent area 3323 and the second absorbent area 3324 are arranged at an angle to form a groove, where negative pressure is more easily generated, resulting in a stronger water absorption effect. Here, this application does not limit the specific form of the absorbent surface 332.

[0067] Please see Figure 7 In some embodiments, the push-suction component 3 of this application further includes a connector 36, which is used to connect the rotating shaft 31 and the push-suction component 3. The connector 36 can be in the form of a connecting rod, a connecting plate, a connecting block, etc., and this application does not limit it in this regard.

[0068] Please see Figure 8To improve the drainage efficiency of the dishwasher, this application further improves the push-suction component 3. The connector 36 in this embodiment may include a spoke 361. Along the direction of rotation of the push-suction component 3, the distance between the bottom surface 3611 of the spoke 361 and the bottom wall of the water collection chamber 11b gradually increases along the axial direction of the filter 21. When the push-suction component 3 rotates, due to the gradually increasing distance between the bottom surface 3611 of the spoke 361 and the bottom wall of the water collection chamber 11b, the spoke 361 generates a downward force on the water flow during rotation. The closer to the front end of the rotation direction, the greater the downward component of this force, allowing the water flow to be more effectively pushed towards the bottom wall of the water collection chamber 11b, i.e., towards the drain outlet and the circulating water outlet, improving pumping efficiency and reducing the power of the drain pump or circulating pump.

[0069] For example, in some embodiments, the push-suction water element 3 is disposed in the filter inner cavity 11c, the circulating water outlet is located at the bottom of the water collection shell 11 and communicates with the filter inner cavity 11c, and the circulating pump is connected to the circulating water outlet and pumps the purified water to the spray element. When the push-suction water element 3 rotates, as the distance between the bottom surface 3611 of the spoke 361 and the bottom wall of the water collection cavity 11b gradually increases, the spoke 361 will generate a downward force on the water flow during the rotation process, and the closer to the front end of the rotation direction, the greater the vertical downward component of this force, so that the water flow can be more effectively pushed to the bottom wall of the filter inner cavity 11c, that is, pushed to the circulating water outlet, thereby improving the pumping efficiency of purified water and reducing the power of the circulating pump.

[0070] Please see Figure 8 and Figure 9 In some embodiments, the bottom surface 3611 of the spokes 361 is curved. In the direction from the pivot 31 to the push-suction blade 32, the curvature of the curved surface is consistent or gradually increases along the direction of the push-suction member 3. When the curvature of the curved surface is consistent, the water flow is pushed at a relatively stable angle and speed. When the curvature of the curved surface gradually increases, water located below the spokes 361 and near the pivot 31 will be directly guided downwards, while water located below the spokes 361 and near the push-suction blade 32 will be guided to flow towards the pivot 31.

[0071] Please see Figure 10 In some embodiments, the bottom surface 3611 of the spoke 361 is flat. In this example, the spoke 361 is relatively simple to manufacture and easy to clean.

[0072] In some embodiments, the angle between the bottom surface 3611 of the spoke 361 and the horizontal plane is not less than 5° and not greater than 85°. For example, the angle between the bottom surface 3611 of the spoke 361 and the horizontal plane can be 5°, 15°, 20°, 30°, 45°, 60°, 75°, 85°, etc., and this application does not limit it.

[0073] In some embodiments, the bottom surface 3611 of the spokes 361 includes a plurality of sequentially joined inclined planes, the angle between each inclined plane and the horizontal plane gradually increasing in the direction from the pivot 31 to the push-pull blade 32. The plurality of sequentially joined inclined planes with gradually increasing angles ensure that water located below the spokes 361 and near the pivot 31 is directly guided downwards, while water located below the spokes 361 and near the push-pull blade 32 is guided to flow towards the pivot 31.

[0074] Please see Figures 8-10 In some embodiments, the top surface 3612 of the spoke 361 is arranged parallel to the bottom surface 3611 of the spoke 361. This makes the shape of the spoke 361 more regular and symmetrical. During the manufacturing process, this regular shape is easier to precisely process through molding, machining, and other processes. Compared with spokes 361 with complex shapes and angle differences between the top surface 3612 and the bottom surface 3611, the parallel structure reduces processing steps and difficulty, lowers the requirements for processing equipment and processes, thereby improving production efficiency and reducing manufacturing costs.

[0075] In some embodiments, the top surface 3612 of the spokes 361 is higher than the midpoint of the filter 21 in the height direction. When the push-suction member 3 rotates, the spokes 361 can guide the water flow from the higher position to the lower part of the filter 21.

[0076] In some embodiments, the filter 21 includes a cylindrical filter screen 212 arranged in an annular shape, and the top surface 3612 of the spoke 361 is not lower than the top of the cylindrical filter screen 212. In this way, more water flow is located below the spoke 361, which can improve the water guiding efficiency of the spoke 361.

[0077] In some embodiments, the top end of the push-suction member 3 is flush with the top end of the cylindrical filter screen 212. Therefore, the rotating sealing surface formed at the top end of the push-suction member 32 does not obstruct the washing water entering the purified water chamber through the filter holes, maximizing the effective filtration area of ​​the cylindrical filter screen 212 and simultaneously maximizing the effective washing water flow rate of the purified water chamber.

[0078] In some embodiments, along the direction of rotation of the push-suction member 3, the thickness of the front end of the spoke 361 is not less than 2 mm and not more than 10 mm. Specifically, when the spoke 361 rotates, it pushes the surrounding fluid. If the front end of the spoke 361 is too thick, the volume of fluid pushed in one rotation is large. The fluid will generate a reaction force on the spoke 361 in the opposite direction of the push, and this force is the resistance that hinders the rotation of the spoke 361. When the thickness of the front end of the spoke 361 is between 2 mm and 10 mm, the volume of the pushed fluid is relatively small, and the reaction force of the fluid on the spoke 361 is also reduced, thereby reducing the rotational resistance. If the thickness of the front end of the spoke 361 is too small, the structural strength will also be small. Therefore, the thickness of the front end of the spoke 361 provided in this application can ensure the structural strength of the spoke 361 and reduce the resistance.

[0079] In some embodiments, the thickness of the spokes 361 is either constant or increased along the direction of the push-suction member 3. When the thickness of the spokes 361 is constant, the fluid can form a relatively stable flow state as it flows through the spokes 361. The interaction between the fluid and the surface of the spokes 361 is more uniform, and no additional turbulence or energy loss is generated due to abrupt changes in thickness, thereby reducing the resistance of the fluid to the spokes 361. If the thickness of the spokes 361 gradually increases along the direction of the push-suction member 3, this gradual shape can guide the fluid to flow more smoothly through the spokes 361, effectively reducing flow resistance.

[0080] Please continue reading. Figures 8-10 In some embodiments, at least two spokes 361 are spaced apart in the height direction. In this example, the water guiding efficiency of the spokes 361 can be increased. When the spokes 361 at different heights rotate, they can apply force to the water flow from multiple height levels simultaneously, which can push the water in the water collection chamber 11b to the bottom more comprehensively and efficiently.

[0081] In some embodiments, the spokes 361 are arranged in pairs and are centrally symmetrical about the rotation axis of the push-suction component 3. This arrangement not only improves water guiding efficiency but also ensures a relatively uniform mass distribution of the push-suction component 3 as it rotates around the rotation axis. When the mass distribution of the object is symmetrical about the rotation axis 31, the inertial forces in various directions can cancel each other out during rotation, thereby effectively reducing the eccentric torque caused by uneven mass and making the rotation of the push-suction component 3 more stable. During the rotation of the push-suction component 3, the spokes 361 are subjected to external forces such as water flow resistance. The paired and centrally symmetrical spoke structure ensures that the external force on each spoke 361 can find an equal and opposite stress on the symmetrical spoke 361 on the other side. These forces balance each other, avoiding rotational offset or vibration caused by excessive force on one side, further enhancing the balance of rotation.

[0082] In some embodiments, the annular outer cavity 11d serves as a wastewater chamber and communicates with the inlet 11a, the filter inner cavity 11c serves as a clean water chamber, the push-suction water element 3 is disposed within the filter inner cavity 11c, the filter 21 also includes a top sealing cover 211, a cylindrical filter screen 212 is disposed below the top sealing cover 211, and a spoke plate 361 is located below the top sealing cover 211. Specifically, during the circulating wash process, under the action of the spoke plate 361, the water flow will accelerate towards the area below the cylindrical filter screen 212, thereby accelerating the water flow towards the circulating water outlet. However, due to the accelerated water flow velocity, the water flow is prone to creating a hollow phenomenon at the cylindrical filter screen 212, and the circulating pump may experience air suction due to air intake. Air suction not only reduces the working efficiency of the circulating pump, affecting the normal circulation and filtration effect of the water flow, but may also damage the circulating pump and shorten its service life. The top sealing cap 211 of the filter 21 in this application can prevent the water flow at the cylindrical filter screen 212 from forming eddies. The water flows into the filter inner cavity 11c through the cylindrical filter screen 212, that is, the water flows into the filter inner cavity 11c from the side. In this way, it can prevent the circulation pump from dry-suction and make the water flow more stable.

[0083] In other embodiments, the filter inner cavity 11c serves as a wastewater chamber and communicates with the water inlet 11a, the annular outer cavity 11d serves as a water inlet chamber, the filter 21 includes a cylindrical filter screen 212, a rotating shaft 31 passes through the cylindrical filter screen 212 with its top end 311 extending out of the cylindrical filter screen 212, a spoke 361 is connected to the top end 311 of the rotating shaft 31 and spans the top of the cylindrical filter screen 212, and a push-suction blade 32 is located within the annular outer cavity 11d and connected to the end of the spoke 361 away from the rotating shaft 31. In this example, the push-water surface 331, the suction surface 332, and the baffle surface 333 act on the outer surface of the cylindrical filter screen 212. In this embodiment, the rotating spokes 361 accelerate the water flow towards the bottom of the cylindrical filter screen 212. Since the spokes 361 spans the top of the cylindrical filter screen 212, the axial distance between the spokes 361 and the drain outlet is relatively large, and the spokes 361 has a relatively large radial length. This means that the rotating spokes 361 can affect a wider range of fluid, resulting in a more uniform distribution of fluid within the filter cavity 11c. During the fluid flow towards the drain outlet, there will be no situation where the flow velocity is too high in some areas and too slow in others, effectively preventing cavitation.

[0084] Please see Figure 1-3To facilitate the rotation of the push-suction water component 3, this application also includes a drive assembly 4. The drive assembly 4 is installed at the lower part of the water collection shell 1 and may include a first drive component 42 and a drive shaft 41. The first drive component 42 may be a motor with an output shaft 421. The drive shaft 41 is connected to the output shaft 421. The rotating shaft 31 of the push-suction water component 3 has a fixing groove. The drive shaft 41 is embedded in the fixing groove. The drive shaft 41 and the rotating shaft 31 can be limited by a limiting structure to achieve a circumferential limit fit, so that the push-suction water component 3 can rotate with the rotation of the drive shaft 41.

[0085] In some embodiments, the drive assembly 4 may also include a transmission gear structure. In this example, the driving force of the motor output shaft 421 can be transmitted to the drive shaft 41 through the transmission gear structure, so that the installation position of the motor can be adjusted according to the installation requirements.

[0086] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0087] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A filter device of a dishwasher, characterized in that, include: A water collection shell has a water collection cavity, and the top of the water collection cavity has a water inlet; A filter is disposed within the water collection chamber, dividing the water collection chamber into an inner filter cavity and an annular outer cavity surrounding the outer periphery of the inner filter cavity. One of the inner filter cavity and the annular outer cavity communicates with the water inlet. A push-suction water element is rotatably disposed in the inner cavity of the filter and the other of the annular outer cavity relative to the water collection shell. The push-suction water element includes a rotating shaft and a push-suction water blade connected to the rotating shaft. The push-suction water blade includes a push surface and a suction surface disposed opposite to each other along the direction of rotation of the push-suction water element. During the rotation of the push surface, there is a radial component of the pushing force on the water. During the rotation of the suction surface, there is a radial component of the suction force on the water. The free end of the push-suction water blade adjacent to the filter also has a water-blocking surface that is disposed opposite to the filter and adapted in shape. The water-blocking surface is connected between the push surface and the suction surface.

2. The filter device of the dishwasher as described in claim 1, characterized in that, The water-retaining surface is a plane; or... The water-blocking surface is curved and protrudes in the direction toward the filter.

3. The filter device of claim 1, wherein the filter device is installed in a lower portion of the washing machine. In the direction of the water-pushing component's rotation, the central axis of the water-blocking surface is parallel to the central axis of the filter.

4. The filter device of claim 1, wherein the filter device is installed in a lower portion of the washing machine. The horizontal cross-section of the water-blocking surface is an arc, and the distance between the arc and the inner surface of the filter is equal everywhere in the radial direction of the filter.

5. The filter device of claim 1, wherein the filter device is installed in a lower portion of the washing machine. In the radial direction of the filter, the distance between the water-blocking surface and the inner surface of the filter is not less than 0 mm and not more than 3 mm.

6. The filter device of claim 1, wherein, The water-retaining surface meets one of the following conditions: The top and bottom of the water-blocking surface are flush with the top and bottom of the water-pushing surface, respectively. The top and bottom of the water-blocking surface are flush with the top and bottom of the water-absorbing surface, respectively. The height of the water-blocking surface is not less than half the height of the filter.

7. The filter device of claim 1, wherein the filter device is installed in a lower portion of the washing machine. A high-pressure zone is formed between the water-pushing surface and the opposite part of the filter, a low-pressure zone is formed between the water-absorbing surface and the opposite part of the filter, and a flat-pressure zone is formed between the water-blocking surface and the opposite part of the filter. The water pressure in the high-pressure zone, the flat-pressure zone, and the low-pressure zone decreases sequentially.

8. The filter device of the dishwasher as described in claim 7, characterized in that, In the rotational direction of the push-suction component, the push surface is located in front of the suction surface, and the distance between the push surface and the adjacent portion of the filter gradually increases.

9. The filter device of the dishwasher as claimed in claim 1, characterized in that, Along the radial direction of the filter, the water-blocking surface has a third projection on the inner surface of the filter, and the area on the filter at least covered by the third projection constitutes a water-blocking area, with two adjacent water-blocking areas spaced apart in the circumferential direction of the filter.

10. The filter device of the dishwasher as claimed in claim 9, characterized in that, The circumferential spacing between two adjacent water-blocking areas of the filter shall not be greater than 100 mm and not less than 5 mm.

11. The filter device of the dishwasher as claimed in claim 9, characterized in that, Along the circumference of the filter, the water-pushing surface has a first projection on the inner surface of the filter, and the area on the filter at least covered by the first projection constitutes the water-pushing area. The water-absorbing surface has a second projection on the inner surface of the filter, and the filter constitutes the water-absorbing area behind the second projection along the direction of the water-pushing and suction components. The area between two adjacent water-pushing areas constitutes at least a water-absorbing area, and the ratio of the area of ​​one water-absorbing area to the area of ​​one water-pushing area is not less than 1 and not greater than 5.

12. The filter device of the dishwasher as claimed in claim 1, characterized in that, The arc lengths of the radial projections of the water-pushing surface and the water-blocking surface onto the filter are a and d, respectively, where 0.8 ≤ a / d ≤ 1.

2.

13. The filter device of the dishwasher as claimed in claim 1, characterized in that, The arc lengths of the water-pushing surface, the water-absorbing surface, and the radial projection of the water-pushing and water-absorbing blades onto the filter are a, b, and c, respectively, where 0.5 ≤ a / c ≤ 1 and 0.5 ≤ b / c ≤ 1.

14. The filter device of the dishwasher as claimed in claim 1, characterized in that, The filter is cylindrical. On the radial section of the filter, one radial line of the filter has a first intersection point with the end of the water-pushing surface near the filter, and a second intersection point with the filter. A first ray and a second ray are formed from the first intersection point and the second intersection point, respectively. The included angle between the first ray and the second ray is θ1. The first ray is tangent to or parallel to the water-pushing surface and extends away from the second intersection point; the second ray is tangent to the filter and extends in the rotation direction of the water-pushing component, with 20°≤θ1≤150°.

15. The filter device of the dishwasher as claimed in claim 1, characterized in that, The water-pushing surface is a plane; or... The water-pushing surface is curved and recessed relative to the water-absorbing surface.

16. The filter device of the dishwasher as claimed in claim 1, characterized in that, The absorbent surface is a plane; or... The absorbent surface is curved; or... The water-absorbing surface includes a first water-absorbing area and a second water-absorbing area that are set at an angle, and the angle formed by the first water-absorbing area and the second water-absorbing area is oriented away from the rotation direction of the push-suction component.

17. A dishwasher, characterized in that, include: The filtration device as described in any one of claims 1-16; The inner tank has a washing chamber that communicates with the water collection chamber; A circulating pump is connected to one of the filter inner cavity and the annular outer cavity; and The drain pump is connected to the inner cavity of the filter and another part of the annular outer cavity.

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