Filtering device and dishwasher

Abstract

The application discloses a filtering device and a dishwasher, and relates to the technical field of household appliances. The filtering device comprises a water collecting shell, a filter and a water pushing and sucking element. The water collecting shell is provided with a water collecting cavity, and the top of the water collecting cavity is provided with a water inlet. The filter is arranged in the water collecting cavity and divides the water collecting cavity into an inner cavity of the filter and an annular outer cavity which is arranged on the outer circumferential side of the inner cavity of the filter and is in communication with the water inlet. The water pushing and sucking element is rotatably arranged in the inner cavity of the filter relative to the water collecting shell. The water pushing and sucking element comprises a water pushing surface and a water sucking surface which are arranged oppositely. During the rotation of the water pushing surface, the pushing force of water on the water pushing surface has a radial component to push water out of the annular outer cavity. The technical scheme of the application can solve the problem that the filtering device in the existing dishwasher is easily blocked by residues.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and in particular to a filtration device and a dishwasher. Background Technology

[0002] In related technologies, during dishwasher operation, food residue on dishes enters the filter with the water flow. However, with prolonged use, the existing filter's mesh layer, with its fine pore structure, needs to intercept small food residues such as rice grains, crumbs, and fibers. This makes the filter prone to clogging due to the continuous accumulation of large amounts of small food residues during the filtration process. Once the filter layer is clogged, the water flow rate through the filter layer decreases significantly, resulting in insufficient water entering the dishwasher's circulation system. This, in turn, affects the overall water circulation efficiency of the dishwasher, preventing the dishes from being thoroughly and effectively cleaned. Utility Model Content

[0003] This application provides a filtering device and a dishwasher, which can solve the problem that the filtering device in existing dishwashers is easily clogged by residue.

[0004] In a first aspect, embodiments of this application provide a filtration device for a dishwasher, comprising:

[0005] A water collection shell has a water collection cavity, and the top of the water collection cavity has a water inlet;

[0006] 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 and communicating with the water inlet; and

[0007] The push-suction water element is rotatably disposed in the inner cavity of the filter relative to the water collection shell. The push-suction water element includes a push surface and a suction surface disposed opposite to each other along the direction 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 to push the water out of the annular outer cavity.

[0008] In some embodiments, a high-pressure zone is formed between the water-pushing surface and the filter, and a low-pressure zone is formed between the water-absorbing surface and the filter.

[0009] In some embodiments, in the rotational direction of the push-suction member, 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.

[0010] 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.

[0011] 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°.

[0012] In some embodiments, the water-pushing surface is an inclined plane; or,

[0013] The water-pushing surface is curved and recessed relative to the water-absorbing surface.

[0014] In some embodiments, the absorbent surface is an inclined plane; or,

[0015] The absorbent surface is curved; or...

[0016] The water-absorbing surface includes a first water-absorbing area and a second water-absorbing area set at an angle, and the angle formed by the two is oriented away from the rotation direction of the push-suction component.

[0017] In some embodiments, the radial distance between the free end of the push-suction element adjacent to the filter and the filter is greater than 0 mm and less than or equal to 10 mm.

[0018] In some embodiments, the inner diameter of the water collection chamber is D1, and the outer diameter of the filter is D2, wherein D2 ≥ 0.5D1.

[0019] In some embodiments, the push-suction water component 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. The arc lengths of the push surface, the suction surface, and the projection of the push-suction water blade onto the filter in the radial direction are a, b, and c, respectively, where 0.5≤a / c≤1 and 0.5≤b / c≤1.

[0020] In some embodiments, the push-suction component includes a rotating shaft and a push-suction blade connected to the rotating shaft to rotate with the rotating shaft, the push-suction blade including the push-water surface and the suction surface;

[0021] The filtration device also includes a drive assembly, which is connected to the rotating shaft via a drive mechanism.

[0022] In some embodiments, the drive assembly includes a first drive shaft, the bottom wall of the water collection chamber is provided with a perforation, the first drive shaft passes through the perforation along the axial direction of the filter, and the rotating shaft is sleeved on the first drive shaft.

[0023] In some embodiments, the drive assembly further includes a first drive member disposed outside the water collection shell;

[0024] Wherein, the first drive shaft is the output shaft of the first drive component; or,

[0025] The output shaft of the first drive unit is connected to the first drive shaft; or,

[0026] The drive assembly further includes a transmission component, and the output shaft of the first drive component is connected to the first drive shaft via the transmission component.

[0027] In some embodiments, it also includes:

[0028] A base is disposed at the bottom of the water collection shell, and the base has an installation cavity;

[0029] The transmission component is installed in the mounting cavity, the first driving component is disposed on the base and located on the periphery of the water collection shell, and the output shaft is arranged parallel to the rotating shaft.

[0030] In some embodiments, the drive assembly further includes a second drive member and a second drive shaft, the second drive shaft passing through the water collection shell and connected to the filter, the second drive member being placed outside the water collection shell and being drively connected to the second drive shaft.

[0031] In some embodiments, the filter is rotatably connected to the water collection shell and rotates in the same direction as the water-pushing component, and the rotational speed of the water-pushing blades is different from the rotational speed of the filter; or,

[0032] The filter is rotatably connected to the water collection shell and rotates in the opposite direction to the push-suction water component.

[0033] In some embodiments, the filter includes a top sealing cap and a cylindrical filter screen disposed below the top sealing cap.

[0034] In some embodiments, the top sealing cap has a vent hole, and the filter further includes a vent valve movably disposed at the vent hole for opening or closing the vent hole;

[0035] When the water level is below the top sealing cover, the vent valve opens the vent hole to release the gas below the top sealing cover; when the water level is above the top sealing cover, the vent valve closes the vent hole.

[0036] In some embodiments, it also includes:

[0037] A planar filter is disposed at the water inlet and located above the top sealing cover;

[0038] Wherein, the axial distance between the top sealing cover and the bottom of the water collection chamber is H1, and the axial distance between the planar filter and the bottom of the water collection chamber is H2, wherein H1 < H2.

[0039] In some embodiments, the top sealing cap includes:

[0040] A cover body, which is placed on top of the cylindrical filter screen; and

[0041] An air guide is connected to the lower surface of the cover, and the horizontal cross-section of the air guide increases from bottom to top.

[0042] In some embodiments, it also includes:

[0043] The cup is positioned at the water inlet, with its bottom abutting against the upper surface of the top sealing cap and covered by the top sealing cap; or, at least part of the bottom of the cup is not covered by the top sealing cap and is in a closed configuration.

[0044] In some embodiments, the filter further includes:

[0045] Multiple support ridges are arranged at intervals along the circumference of the top sealing cover, and their top ends are connected to the lower surface of the top sealing cover.

[0046] The cylindrical filter screen is arranged around the outer periphery of the plurality of supporting edges or is sandwiched by the supporting edges.

[0047] In some embodiments, the filter further includes:

[0048] A lower support ring is connected to the bottom ends of the plurality of support ridges, and its outer peripheral wall is recessed with an annular groove; and

[0049] A sealing ring is installed in the annular groove and seals against the wall of the water collection chamber.

[0050] In some embodiments, a buckle is provided on the side of the lower support ring opposite to the support ridge, and a buckle groove is provided on the cavity wall of the water collection cavity, wherein the buckle engages with the buckle groove.

[0051] In some embodiments, the push-suction component includes a rotating shaft and a push-suction blade connected to the rotating shaft, wherein the push-suction blade includes a push surface and a suction surface;

[0052] The free end of the push-suction component adjacent to the filter also has a water-blocking surface that is opposite to the filter and adapted in shape, and the water-blocking surface is connected between the push-suction surface and the suction surface.

[0053] In some embodiments, the water collection shell further has a communication port for connecting the filter inner cavity with the annular outer cavity, and a first one-way valve is provided at the communication port; the first one-way valve only allows the filter inner cavity to achieve one-way communication with the annular outer cavity through the communication port.

[0054] In some embodiments, the top surface of the push-suction element is higher than the midpoint of the filter in the height direction.

[0055] In some embodiments, it also includes:

[0056] A planar filter, covering the top of the water collection shell, the planar filter having an installation port; and

[0057] A cup is installed at the mounting port. The cup has a filter groove with an open top and a cup filter hole connecting the filter groove and the annular outer cavity.

[0058] In some embodiments, the pore size of the cup, the pore size of the planar filter, and the pore size of the filter decrease sequentially.

[0059] Secondly, this application proposes a dishwasher, comprising:

[0060] The filtration device as described above;

[0061] The inner tank has a washing chamber that communicates with the water collection chamber;

[0062] A circulation pump, connected to the inner cavity of the filter; and

[0063] A drainage pump is connected to the annular outer cavity.

[0064] Based on the filtration device proposed in this application, a water-pushing and suction component rotatable relative to the water-collecting shell is provided inside the filter cavity. When the water-pushing and suction component rotates, the pushing surface and the suction surface create forced convection of washing water between the filter cavity and the annular outer cavity. The pushing surface generates radial thrust, which quickly discharges the filtered washing water from the filter cavity to the annular outer cavity, impacting food residue, oil, and other impurities that are clogging the filter holes, thereby clearing the filter holes. Attached Figure Description

[0065] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0066] Figure 1 This is a partial structural schematic diagram of an embodiment of the dishwasher of this application;

[0067] Figure 2 This is a side sectional view of an embodiment of the filtering device of this application;

[0068] Figure 3 This is an exploded view of the structure of an embodiment of the filtering device of this application;

[0069] Figure 4 This is a side sectional view of another embodiment of the filtering device of this application;

[0070] Figure 5 for Figure 2 Sectional view at point AA;

[0071] Figure 6 This is a top sectional view of the push-suction element and the filter in one embodiment of the filtration device of this application;

[0072] Figure 7 This is a side sectional view of the push-suction element and the filter in one embodiment of the filtration device of this application;

[0073] Figure 8 This is a side sectional view of a filter in one embodiment of the filtering device of this application;

[0074] Figure 9 This is a side sectional view of the filter in another embodiment of the filtering device of this application;

[0075] Figure 10 This is a schematic diagram of the structure of the elastic element in one embodiment of the filtering device of this application;

[0076] Figure 11 This is a cross-sectional schematic diagram of the connection structure between the filter and the drive assembly in one embodiment of the filtering device of this application;

[0077] Figure 12 This is a side sectional view of another embodiment of the filtering device of this application;

[0078] Figure 13 This is a top view of the cup and filter assembled in one embodiment of the filtering device of this application;

[0079] Figure 14This is a top view of the cup and filter assembled in another embodiment of the filtering device of this application;

[0080] Figure 15 This is a top view of the cup and filter assembled in another embodiment of the filtering device of this application;

[0081] Figure 16 This is an exploded view of another embodiment of the filtering device of this application;

[0082] Figure 17 for Figure 2 A magnified view of a portion of point B in the middle;

[0083] Figure 18 This is a top sectional view of the push-suction element and the filter in another embodiment of the filtration device of this application;

[0084] Figure 19 for Figure 18 A magnified view of a portion of point D in the middle;

[0085] Figure 20 This is a schematic diagram of the structure of the push-suction element in one embodiment of the filtration device of this application;

[0086] Figure 21 This is a top sectional view of an embodiment of the filtering device of this application;

[0087] Figure 22 This is a schematic diagram of the push-suction element in another embodiment of the filtration device of this application;

[0088] Figure 23 This is a top sectional view of the suction element and the filter in another embodiment of the filtration device of this application;

[0089] Figure 24 This is a schematic diagram of the water collection shell in one embodiment of the filtration device of this application;

[0090] Figure 25 for Figure 2 Sectional view at point CC.

[0091] Explanation of icon numbers:

[0092] 100. Filter device; 1. Water collection shell; 11. Water cup body; 11a. Water inlet; 11b. Water collection chamber; 11c. Filter inner cavity; 11d. Annular outer cavity; 11f. Perforation; 11h. Assembly groove; 11i. Outer cavity outlet; 11j. Inner cavity outlet; 11k. Water outlet groove; 11q. Conductor port; 11r. Rotary groove; 12. Drain pipe; 12a. Drain chamber; 12b. Sludge collection chamber; 13. Circulating water connection pipe; 15. First one-way valve; 21. Filter; 211. Top sealing cover; 211a. Exhaust port; 211b. Air guide groove; 2111. Cover; 2112. Air guide section; 2114. Air guide surface; 2113. Guide slope; 212. Cylindrical filter screen; 2124. Second intersection point; 2125. Second ray; 213. Exhaust valve; 2131. Elastic sheet; 2132. Buoyancy component; 2133. Sealing part; 2134. Connecting part; 2135. Second exhaust channel; 2136. Limiting part; 2137. First exhaust channel; 2141. Support ridge; 2146. Lower support Support ring; 21461, swivel; 21462, annular groove; 2147, sealing ring; 22, primary filter; 23, flat filter; 23a, mounting port; 24, lifting cup; 2411, overlapping area; 2412, closed area; 24a, filter tank; 24b, lifting cup filter hole; 24c, bottom filter hole; 24d, side filter hole; 3, push-suction component; 31, rotating shaft; 32, push-suction blade; 33, blade body; 331, push-water surface; 3313, first intersection point; 3314, first ray. 332, Water-absorbing surface; 3323, First water-absorbing zone; 3324, Second water-absorbing zone; 333, Water-blocking surface; 34, Elastic element; 36, Connecting element; 4, Drive assembly; 41, First drive shaft; 42, First drive element; 421, Output shaft; 43, Transmission element; 431, Gear; 46, Top bearing; 47, Bottom bearing; 48, Oil seal element; 5, Base; 200, Inner liner; 300, Circulation pump; 500, Spraying element; 510, Upper spray arm; 520, Middle spray arm; 530, Lower spray arm.

[0093] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0094] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0095] 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 this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0096] In the description of this application, 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 the above terms in this application based on the specific circumstances. Furthermore, in the description of this application, 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, or B existing alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0097] 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 application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0098] This application discloses a dishwasher for cleaning tableware, the dishwasher including a shell, an inner tub, a filter, a water circulation system and a drainage system.

[0099] The casing, as the exterior component of the dishwasher, protects the internal parts. The casing can be square in shape. It can be made of metal to give the dishwasher high strength and durability. Alternatively, it can be made of plastic to give it a lighter weight; this application does not limit the choice.

[0100] The inner liner is located inside the shell and has a washing chamber. The inner liner is equipped with a dish rack for placing tableware to be washed. The inner liner is also equipped with a spray nozzle, which is located above or below the dish rack. Water is sprayed out through the spray nozzle to rinse the tableware.

[0101] Please see Figure 1 and Figure 2 Specifically, the spray unit 500 includes an upper spray arm 510 and a lower spray arm 530 disposed within the inner liner 200, and the upper spray arm 510 and the lower spray arm 530 are connected by a pipe. The lower spray arm 530 is positioned below the dish rack, and a nozzle is located on its upper side for spraying washing water upwards to clean the dishes inside the dish rack. The upper spray arm 510 is positioned above the dish rack, and a nozzle is located on its lower side for spraying washing water downwards. Combined with the nozzle of the lower spray arm 530, this achieves comprehensive cleaning of the dishes inside the dish rack.

[0102] Optionally, when the inner liner 200 is equipped with multiple layers of dish racks, the spray arm also includes a middle spray arm 520 disposed between two adjacent dish racks. The upper spray arm 510, the middle spray arm 520, and the lower spray arm 530 are connected by a pipe. The middle spray arm 520 is equipped with nozzles on both its upper and lower sides, which are used to clean the tableware in the upper and lower dish racks, respectively.

[0103] The filter device 100 is located below the inner tank 200 and has a water collection chamber 11b that communicates with the washing chamber. The water collection chamber 11b is used to store the washing water used to rinse the tableware, and also to collect the washing water generated after washing the tableware and filter the washing water.

[0104] The circulating water system includes a circulating pump 300 connecting the water collection chamber 11b and the spray element 500, and the drainage system includes a drain pump connecting the water collection chamber 11b. The dishwasher has a washing mode and a drain mode. In washing mode, the water collection chamber 11b of the filter device 100 is connected to the spray element 500 via the circulating pump 300. The circulating pump 300 draws washing water from the water collection chamber 11b and delivers it to the spray element 500, where it sprays the water to rinse the dishes. The filter device 100 collects the washed water and filters out any residue. The filtered water is then returned to the spray element 500 via the circulating pump 300 for further washing of the dishes. This cycle repeats, allowing for the reuse of washing water. After the dishes are washed, or after the washing water has been reused a certain number of times, the dishwasher is switched to drain mode, and the drain pump is activated to discharge the washing water and filtered residue from the water collection chamber 11b outside the dishwasher.

[0105] Please see Figure 2 and Figure 3 This application also proposes a filtration device 100 for a dishwasher. The filtration device 100 includes a water collection shell 1, a filter 21, and a push-suction water element 3. The water collection shell 1 has a water collection cavity 11b, and the top of the water collection cavity 11b has a water inlet 11a; the filter 21 is disposed in the water collection cavity 11b and divides the water collection cavity 11b into a filter inner cavity 11c and an annular outer cavity 11d disposed around the outer periphery of the filter inner cavity 11c and communicating with the water inlet 11a; the push-suction water element 3 is rotatably disposed in the filter inner cavity 11c relative to the water collection shell 1. The push-suction water element 3 includes a push surface 331 and a suction surface 332 disposed opposite to each other along the direction of rotation of the push-suction water element 3. During the rotation of the push surface 331, the pushing force on the water has a radial component to push the water out to the annular outer cavity 11d. During the rotation of the suction surface 332, the suction force on the water has a radial component to draw the water into the filter inner cavity 11c.

[0106] It is understood that the water collection chamber 11b is connected to the washing chamber of the inner tank 200 through the water inlet 11a at the top, meaning that the washing water after washing flows into the water collection chamber 11b through the water inlet 11a. Specifically, the filter 21 divides the water collection chamber 11b into an inner filter chamber 11c and an annular outer chamber 11d surrounding the inner filter chamber 11c. The annular outer chamber 11d is connected to the water inlet 11a, meaning that the washing water flows directly into the annular outer chamber 11d through the water inlet 11a. The filter 21 has filter holes for filtering residue. As the washing water in the annular outer chamber 11d flows into the inner filter chamber 11c through the filter holes, the residue in the washing water is blocked in the annular outer chamber 11d, so that the inner filter chamber 11c stores relatively clean washing water. At this time, the annular outer chamber 11d serves as a wastewater chamber, and the inner filter chamber 11c serves as a clean water chamber.

[0107] Correspondingly, the circulation pump 300 is connected to the filter cavity 11c at this time, used to re-transport the filtered washing water in the filter cavity 11c to the spray unit 500 for washing the tableware, thus realizing the reuse of washing water. The smaller the pore size of the filter 21, the smaller the residue particles can be blocked in the annular outer cavity 11d, improving the filtration effect of the washing water. However, smaller pores are also more prone to clogging, leading to poor water flow, affecting filtration efficiency, and also affecting the flow rate of washing water delivered to the spray unit 500 by the dishwasher in washing mode, thus affecting the cleaning effect of the tableware. Therefore, the design must balance the pore size to ensure both filtration effect and smooth water flow. Regularly cleaning the pores is also a key measure to maintain the normal operation of the filter device 100.

[0108] Specifically, the filter 21 includes, but is not limited to, a cylindrical filter or a conical filter, or other shapes that can divide the water collection chamber 11b into a filter inner cavity 11c and an annular outer cavity 11d, without any specific limitations.

[0109] Please continue reading. Figure 2 and Figure 3 In one embodiment, the filtration device 100 further includes a primary filter 22, which includes a planar filter 23 and a cup 24; the planar filter 23 is disposed on the top of the water collection shell 1 and has an installation port 23a; the cup 24 is installed in the installation port 23a and has a filter groove 24a with an open top and filter holes connecting the filter groove 24a and the annular outer cavity 11d.

[0110] The washing water after washing dishes is initially filtered through the flat filter 23 and the cup 24 to prevent larger residues from entering the water collection chamber 11b and becoming difficult to clean, while also preventing larger residues from affecting the filtration effect of the filter 21.

[0111] Furthermore, the pore size of the cup 24, the pore size of the planar filter 23, and the pore size of the filter 21 decrease sequentially.

[0112] The filtration aperture of the cup 24 is the same as the aperture of the filter holes on the cup 24. The filtration aperture of the flat filter 23 is the same as the aperture of the filter holes on the flat filter 23. The filtration aperture of the filter 21 is the same as the aperture of the filter holes on the filter 21. After the washing water enters the annular outer cavity 11d through the filter holes of the flat filter 23 or through the filter holes of the cup 24, larger residues are blocked by the flat filter 23 and the cup 24. The filtration aperture of the filter 21 is set to be relatively small, which can achieve one-time filtration of the washing water. This ensures that the washing water entering the circulation pump 300 and being re-delivered to the spray unit 500 is free of residue or contains only a small amount of tiny residue, thus avoiding clogging of the spray nozzles of the spray unit 500 and affecting the cleaning effect on the tableware.

[0113] Correspondingly, because the filter pores of filter 21 are set to a small size, while achieving a high residue filtration effect, filter 21 is also more prone to clogging by residue. Therefore, to solve the problem of filter pores of filter 21 being easily clogged by residue, a push-suction element 3 rotatable relative to the water collection shell 1 is installed in the filter inner cavity 11c. When the push-suction element 3 rotates, the push surface 331 and the suction surface 332 form a forced convection of washing water between the filter inner cavity 11c and the annular outer cavity 11d. The push surface 331 generates radial thrust to quickly discharge the filtered washing water in the filter inner cavity 11c to the annular outer cavity 11d, impacting food residue and oil stains and other impurities clogging the filter pores, thus clearing the filter pores. At the same time, the suction surface 332 generates radial suction to draw the washing water in the annular outer cavity 11d into the filter inner cavity 11c, improving the filtration efficiency and preventing some of the washing water in the filter inner cavity 11c from being discharged into the annular outer cavity 11d and failing to provide sufficient circulating washing water for the spray element 500.

[0114] Please see Figure 4It should be noted that the push-suction water element 3 can also be disposed within the annular outer cavity 11d. Specifically, in some embodiments, the filtration device 100 includes a water collection shell 1, a filter 21, and a push-suction water element 3. The water collecting shell 1 has a water collecting cavity 11b, and the top of the water collecting cavity 11b has a water inlet 11a; the filter 21 is disposed in the water collecting cavity 11b and divides the water collecting cavity 11b into a filter inner cavity 11c and an annular outer cavity 11d surrounding the outer periphery of the filter inner cavity 11c. The filter inner cavity 11c is connected to the water inlet 11a; the push-suction member 3 is rotatably disposed in the annular outer cavity 11d relative to the water collecting shell 1. The push-suction member 3 includes a push surface 331 and a suction surface 332 disposed opposite to each other along the direction of the push-suction member 3. During the rotation of the push surface 331, the pushing force on the water has a radial component to push the water out to the filter inner cavity 11c. During the rotation of the suction surface 332, the suction force on the water has a radial component to draw the water into the annular outer cavity 11d.

[0115] At this point, the filter inner cavity 11c serves as the wastewater chamber, and the annular outer cavity 11d serves as the clean water chamber. The filter inner cavity 11c is connected to the water inlet 11a, and the washing water after washing dishes flows directly into the filter inner cavity 11c through the water inlet 11a. The filter 21 has filter holes for filtering residue. As the washing water in the filter inner cavity 11c flows into the annular outer cavity 11d through the filter holes, the residue in the washing water is blocked in the filter inner cavity 11c, so that the annular outer cavity 11d stores relatively clean washing water. Therefore, residue easily adheres to the surface of the filter 21 facing the filter inner cavity 11c, which in turn causes the filter holes of the filter 21 to become clogged.

[0116] Correspondingly, the circulating pump 300 is connected to the annular outer cavity 11d at this time, and is used to re-transport the filtered washing water in the annular outer cavity 11d to the spray unit 500 for washing the tableware, realizing the reuse of washing water. By setting a push-suction water element 3 that is rotatable relative to the water collection shell 1 in the annular outer cavity 11d, when the push-suction water element 3 rotates, the push surface 331 and the suction surface 332 form a forced convection of washing water between the filter inner cavity 11c and the annular outer cavity 11d. The push surface 331 generates radial thrust to quickly discharge the filtered washing water in the annular outer cavity 11d into the filter inner cavity 11c, impacting food residue and oil stains and other impurities that are clogging the filter holes, thereby clearing the filter holes. At the same time, the water-absorbing surface 332 generates radial suction to draw the washing water in the filter inner cavity 11c into the annular outer cavity 11d, which improves the filtration efficiency and prevents some of the washing water in the annular outer cavity 11d from being discharged into the filter inner cavity 11c, thus failing to provide enough circulating washing water for the spray element 500.

[0117] Understandably, as the push-suction component 3 rotates relative to the filter 21, the washing water pushed by the push surface 331 is pushed from different areas of the filter 21 through the inner cavity 11c to the outer annular cavity 11d, or from different areas of the filter 21 through the outer annular cavity 1 to the inner cavity 11c. That is, the areas on the filter 21 impacted by the reverse water flow move as the push-suction component 3 rotates, thereby achieving comprehensive unblocking of the filter pores in different areas of the filter 21.

[0118] Specifically, a high-pressure zone is formed between the water-pushing surface 331 and the filter 21, and a low-pressure zone is formed between the water-absorbing surface 332 and the filter 21.

[0119] Taking the push-suction element 3 installed in the filter inner cavity 11c as an example, under the action of the push surface 331, the washing water pressure in the high-pressure zone is greater than the washing water pressure in the annular outer cavity 11d. Under the action of the pressure difference, the washing water in the high-pressure zone flows towards the annular outer cavity 11d and impacts the filter 21, thereby flushing away food residue, oil stains, and other impurities that are blocking the filter holes, thus clearing the filter holes. Under the action of the suction surface 332, the washing water pressure in the low-pressure zone is less than the washing water pressure in the annular outer cavity 11d. Under the action of the pressure difference, the washing water in the annular outer cavity 11d flows towards the low-pressure zone, improving the filtration efficiency of the filter 21. Thus, in the washing mode, the filter device 100 can provide sufficient clean washing water to the spray element 500.

[0120] Similarly, when the push-suction element 3 is installed in the annular outer cavity 11d, under the action of the push-water surface 331, the washing water pressure in the high-pressure zone is greater than the washing water pressure in the filter inner cavity 11c. Under the action of the pressure difference, the washing water in the high-pressure zone flows towards the filter inner cavity 11c. Under the action of the suction surface 332, the washing water pressure in the low-pressure zone is less than the washing water pressure in the filter inner cavity 11c. Under the action of the pressure difference, the washing water in the filter inner cavity 11c flows towards the low-pressure zone. The specific functions are the same as described above and will not be repeated here.

[0121] Please see the figure and Figure 6 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 part of the filter 21 gradually increases.

[0122] Understandably, when the push-suction component 3 rotates, the push surface 331 is located in front of the suction surface 332, and the push surface 331 pushes the washing water to flow. Since the distance between the push surface 331 and the adjacent portion of the filter 21 gradually increases, it indicates that the push surface 331 extends radially along both the rotation direction of the push-suction component 3 and the filter 21. When the push surface 331 acts on the washing water, the water flow acquires a tangential velocity along the rotation direction of the push-suction component 3 and a radial velocity along the radial direction of the filter 21, ultimately giving the washing water flow acting on the push surface 331 a resultant velocity towards the filter 21. This causes the washing water flow acting on the push surface 331 to impact the filter 21, flushing away food residue and oil stains clogging the filter holes, thus clearing the filter holes.

[0123] Specifically, the water-pushing surface 331 can be configured as an inclined plane, that is, a plane inclined in the rotation direction of the water-pushing and suction member 3. The water-pushing surface 331 can also be configured as a curved surface that is concave relative to the water-suction surface 332, so that the arc formed by the concavity faces the adjacent cylindrical filter screen. Of course, the water-pushing surface 331 can also be configured as other types that can achieve the water-pushing effect, and this application does not limit this.

[0124] Optionally, the water-pushing surface 331 is parallel to the axis of the rotating shaft 31, that is, the extension path of the water-pushing surface 331 in the axial direction of the rotating shaft 31 is parallel to the axis of the rotating shaft 31. The water-pushing surface 331 can also be inclined relative to the axis of the rotating shaft 31, that is, the extension path of the water-pushing surface 331 in the axial direction of the rotating shaft 31 is inclined relative to the axis of the rotating shaft 31.

[0125] Please see Figure 6 In some embodiments, the filter 21 is cylindrical. On the radial cross-section of the filter 21, a radial line of the filter 21 intersects the push surface 331 near the end of the filter 21 at a first intersection point 3313, and intersects the filter 21 at a second intersection point 2124. 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 or parallel to the push surface 331 and extends away from the second intersection point 2124. The second ray 2125 is tangent to the filter 21 and extends in the rotation direction of the push-suction element 3, where 20°≤θ1≤150°.

[0126] Understandably, if θ1 is too small, it indicates that the angle between the pushing surface 331 and the adjacent filter 21 is small, resulting in a reduced flow rate of washing water pushed by the rotating pushing surface 331. If θ1 is too large, the radial component of the force exerted by the pushing surface 331 on the washing water decreases, reducing the impact force of the washing water on the filter 21, both of which affect the unblocking effect on the filter pores of the filter 21. By limiting θ1 to 150°, the pushing flow rate and the force exerted by the pushing surface 331 are balanced, ensuring the unblocking rate of the filter pores of the filter 21.

[0127] Please see Figure 18 , Figure 21 and Figure 22 Specifically, the absorbent surface 332 can be configured as an inclined plane, that is, a plane inclined in the rotation direction of the push-suction member 3. The absorbent surface 332 can also be configured as a curved surface, or it can be configured to include a first absorbent area 3323 and a second absorbent area 3324 set at an angle, with the angle formed by the two facing away from the rotation direction of the push-suction member 3. Of course, the absorbent surface 332 can also be configured as other types that can achieve the water absorption effect, and this application does not limit this.

[0128] It is understandable that the push-suction component 3 needs to reach a certain rotational speed to generate sufficient radial thrust from the push surface 331 to push the washing water into the annular outer cavity 11d, and sufficient radial suction from the suction surface 332 to draw the washing water into the filter inner cavity 11c. Radially, the washing water in the annular outer cavity 11d can flow into the filter inner cavity 11c through the radial suction of the suction surface 332. If the rotational speed is too high, a rotating sealing surface may form on the periphery of the push-suction component 3, affecting the inflow and outflow of washing water. Therefore, the rotational speed needs to be reasonably controlled to improve the unblocking rate while ensuring filtration efficiency. Specifically, the rotational speed of the push-suction component 3 is greater than or equal to 100 rpm and less than or equal to 1500 rpm.

[0129] In the axial direction of the push-suction component 3, the top surface of the push-suction component 3 forms a rotating sealing surface effect when it rotates rapidly. That is, the washing water above the push-suction component 3 cannot be pushed by the push surface 331 to pass through the filter holes when the push-suction component 3 rotates, nor can it be sucked by the circulation pump 300 to clean the tableware, resulting in a reduction in the actual effective washing water flow rate in the filter inner cavity 11c.

[0130] Therefore, in some embodiments, the top surface of the push-suction member 3 is higher than the midpoint of the filter 21 in the height direction. The midpoint of the filter 21 can be regarded as the middle plane of the filter 21 in the height direction. By setting the top surface of the push-suction member 3 to be higher than the midpoint of the filter 21 in the height direction, the washing water in the annular outer cavity 11d can at least enter the filter inner cavity 11c through the lower half of the filter 21, and be pushed by the push surface 331 to pass through the filter holes, and be sucked by the circulation pump 300 to the spray member 500 to clean the tableware, so as to avoid the washing water flow rate sucked by the circulation pump 300 being too small and affecting the cleaning effect of the tableware.

[0131] Specifically, in some embodiments, the filter 21 includes a cylindrical filter screen 212 arranged in an annular shape, and the top surface of the push-suction member 3 is not lower than the top surface of the cylindrical filter screen 212. The cylindrical filter screen 212 has filter holes on its periphery that connect the annular outer cavity 11d and the filter inner cavity 11c. The top surface of the push-suction member 3 is not lower than the top surface of the cylindrical filter screen 212. Optionally, the top surface of the push-suction member 3 is flush with the top surface of the cylindrical filter screen 212, or the top surface of the push-suction member 3 is higher than the top surface of the cylindrical filter screen 212. Thus, the rotating sealing surface formed by the top surface of the push-suction member 3 will not block the washing water entering the filter inner cavity 11c 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 filter inner cavity 11c.

[0132] Please see Figure 7 In some embodiments, the 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 push-suction blade 32 includes a push-water surface 331 and a suction surface 332. The filter 21 also includes a top sealing cover 211, a cylindrical filter screen 212 disposed below the top sealing cover 211, and the top surface of the push-suction blade 32 is spaced apart from the top sealing cover 211.

[0133] The top sealing cap 211 blocks the top communication channel between the annular outer cavity 11d and the filter inner cavity 11c, ensuring that the washing water in the annular outer cavity 11d must be filtered through the cylindrical filter screen 212 before entering the filter inner cavity 11c. This prevents washing water mixed with residue from flowing into the filter inner cavity 11c through the top gap. The push-suction vane 32 and the top sealing cap 211 are designed with a non-contact separation to prevent the push-suction vane 32 from colliding or rubbing against the top sealing cap 211 during rotation, which would affect the rotational stability and service life of the push-suction vane 32.

[0134] Accordingly, in some embodiments, the radial distance between the free end of the push-suction element 3 adjacent to the filter 21 and the filter 21 is greater than 0 mm and less than or equal to 10 mm.

[0135] By setting the radial distance between the free end of the push-suction water component 3 adjacent to the filter 21 and the filter 21 to be greater than 0 mm, a certain distance is maintained between the push-suction water component 3 and the filter 21. That is, the push-suction water blade 32 and the cylindrical filter screen 212 are kept at a distance, avoiding collision or friction between the push-suction water blade 32 and the cylindrical filter screen 212 during rotation, which would affect the rotational stability and service life of the push-suction water blade 32. By setting the radial distance between the free end of the push-suction water component 3 adjacent to the filter 21 and the filter 21 to be less than or equal to 10 mm, the distance between the push surface 331 and the suction surface 332 and the filter 21 is avoided from being too large, which would cause a significant decrease in the speed of the washing water flowing to the cylindrical filter screen 212 under the action of the push surface 331, reducing the impact force of this part of the washing water and preventing it from passing through the filter holes normally. Similarly, the suction force of the suction surface 332 on the washing water in the annular outer cavity 11d is also prevented from decreasing. Therefore, by limiting the radial distance between the free end of the push-suction component 3 adjacent to the filter 21 and the filter 21, the effective pushing of water by the push surface 331 and the effective suction of water by the suction surface 332 can be guaranteed.

[0136] It is understandable that, in addition to the radial distance between the free end of the push-suction component 3 adjacent to the filter 21 and the filter 21, the setting length of the push surface 331 and the suction surface 332 relative to the filter 21 will also affect the effect of the push surface 331 and the suction surface 332. If the setting length of the push surface 331 and the suction surface 332 relative to the filter 21 is too small, the contact area between the push surface 331 and the suction surface 332 and the washing water is reduced when the push-suction blade 32 rotates, thereby reducing the push volume of the push surface 331 and the suction volume of the suction surface 332, affecting the effect of unblocking the filter holes and the amount of washing water supplied to the circulation pump 300.

[0137] Therefore, in some embodiments, the arc lengths of the radial projections of the push surface 331, the suction surface 332, and the push-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. This ensures that the push surface 331 covers a sufficiently large area when the push-suction blade 32 rotates, generating a stronger radial thrust to drive the washing water in the filter inner cavity 11c to be quickly discharged into the annular outer cavity 11d. Similarly, it ensures that the suction surface 332 forms a wider suction range, enhancing the suction efficiency of the washing water in the annular outer cavity 11d. Simultaneously, it makes the hydraulic load distribution of the push-suction blade 32 more uniform during rotation.

[0138] Please continue reading. Figure 7 In some embodiments, the push-suction component 3 further includes a connector 36, the two ends of which are respectively connected to one end of the push-suction blade 32 near the top sealing cover 211 and the other end of the rotating shaft 31 near the top sealing cover 211.

[0139] The push-suction vane 32 is connected to the rotating shaft 31 via the connector 36. Since the connector 36 is connected to the end of the push-suction vane 32 near the top sealing cover 211, it indicates that the space between the push-suction vane 32 and the rotating shaft 31 and below the connector 36 is an unobstructed space. After the washing water is sucked into the filter inner cavity 11c, some of the washing water is pushed back to the annular outer cavity 11d under the action of the push surface 331, and some of the washing water flows to the unobstructed space between the push-suction vane 32 and the rotating shaft 31. Then, under the action of gravity, it flows towards the bottom of the filter inner cavity 11c to accumulate at the bottom of the filter inner cavity 11c or is delivered to the spray element 500 under the action of the circulation pump 300 to provide enough clean washing water to clean the tableware.

[0140] Please continue reading. Figure 7 In some embodiments, the projection of the top sealing cap 211 onto the cylindrical filter screen 212 in the axial direction of the filter 21. That is, when viewing the filter 21 from above, the cylindrical filter screen 212 is covered by the top sealing cap 211. Thus, when water flows from the inlet 11a into the collection chamber 11b, the water is first blocked by the top sealing cap 211 and flows into the annular outer cavity 11d, and then enters the filter inner cavity 11c after being filtered by the cylindrical filter screen 212. The top edge of the cylindrical filter screen 212 is usually a structurally weak area (such as welding points or interfaces). The top sealing cap 211 can physically protect the top of the cylindrical filter screen 212 from external impacts, mechanical damage during installation, or deformation caused by water flow impact, reducing the probability of the cylindrical filter screen 212 failing due to edge damage.

[0141] Please see Figure 3 In some embodiments, the top sealing cover 211 is in the shape of a circular plate. In this way, when the top sealing cover 211 is impacted by water flow in the axial direction, the stress can be evenly distributed along the circumference, without stress concentration caused by sharp corners, making it less prone to deformation and cracking, and maintaining the flatness of the sealing surface for a long time, thus ensuring sealing stability.

[0142] Further, please refer to Figure 3 and Figure 7 In some embodiments, the top sealing cap 211 has a vent 211a, and the filter 21 further includes a vent valve 213 movably disposed at the vent 211a, the vent valve 213 being used to open or close the vent 211a; wherein, when the water level is below the top sealing cap 211, the vent valve 213 opens the vent 211a to discharge the gas below the top sealing cap 211; when the water level is above the top sealing cap 211, the vent valve 213 closes the vent 211a.

[0143] Understandably, when the water level is below the top sealing cover 211, the air below the top sealing cover 211 is discharged by opening the vent 211a. This prevents air from accumulating in the upper part of the filter inner cavity 11c after the water level rises, which would cause the air pressure in the filter inner cavity 11c to be greater than the air pressure in the annular outer cavity 11d, increasing the resistance of the washing water flowing from the annular outer cavity 11d to the filter inner cavity 11c and affecting the filtration efficiency of the filter 21. When the water level is above the top sealing cover 211, the vent 211a is closed by the vent valve 213, making the filter inner cavity 11c relatively sealed. When the circulation pump 300 is working, it can better pump the washing water into the filter inner cavity 11c and pump it out to the spray unit 500.

[0144] Please see Figure 8 In some embodiments, the vent valve 213 includes an elastic piece 2131, which is at least partially located on the upper surface of the top sealing cover 211; wherein, when the water level is below the top sealing cover 211, the elastic piece 2131 can open the vent hole 211a under the push of gas; when the water level is above the top sealing cover 211 and the dishwasher's circulation pump is working, the elastic piece 2131 closes the vent hole 211a under the action of water flow.

[0145] Thus, when the water level is lower than the top sealing cover 211, water will enter the filter cavity 11c through the cylindrical filter screen 212. As the water level rises, the gas in the filter cavity 11c will push the elastic sheet 2131 to open the vent 211a, and then be discharged from the vent 211a. When the water level is higher than the top sealing cover 211 and the dishwasher's circulation pump is working, the water in the filter cavity 11c will flow under the action of the circulation pump, and drive the elastic sheet 2131 to close the vent 211a, thereby preventing water from directly entering the filter cavity 11c through the drain hole, so that water can only enter the filter cavity 11c through the cylindrical filter screen 212.

[0146] Specifically, the circulation pump is sealed to the bottom of the cylindrical filter screen 212 and communicates with the filter inner cavity 11c, ensuring that the circulation pump only draws in water filtered by the cylindrical filter screen 212. When the circulation pump is working, it will generate negative pressure in the filter inner cavity 11c, thereby driving the water in the filter inner cavity 11c to flow into the circulation pump and causing the elastic sheet 2131 to close the exhaust port 211a.

[0147] The elastic sheet 2131 can be in the form of a thin film or a block. Preferably, the elastic sheet 2131 is in the form of a thin film, which allows it to better deform and seal the exhaust port 211a. It also facilitates the movement of gas within the filter cavity 11c, which pushes the elastic sheet 2131 to open the exhaust port 211a and allow gas to escape from it. Specifically, one end of the elastic sheet 2131 can be rotatably mounted on the upper surface of the top sealing cover 211, opening or closing the exhaust port 211a by rotation. Alternatively, one end of the elastic sheet 2131 can be adhered to the upper surface of the top sealing cover 211, allowing the other end to open or close the exhaust port 211a through elastic deformation. Further examples are not listed here.

[0148] It should be noted that when the water level is lower than the top sealing cover 211, the elastic sheet 2131 can block the water and prevent it from entering directly from the drain hole. Part of the gas in the filter cavity 11c will be discharged from the filter hole of the cylindrical filter screen 212. The other part of the gas in the filter cavity 11c pushes the elastic sheet 2131 to open the vent hole 211a. At this time, the opening of the elastic sheet 2131 is very small and only allows gas to be discharged, which can prevent water from entering the filter cavity 11c directly through the vent hole 211a.

[0149] Please see Figure 9 In other embodiments, the vent valve 213 includes a buoyancy member 2132, which passes through the vent hole 211a and has its two ends exposed on the upper and lower sides of the top sealing cover 211, respectively. The density of the buoyancy member 2132 is less than that of water. When the water level is lower than the top sealing cover 211 and the water contacts the buoyancy member 2132, the buoyancy member 2132 opens the vent hole 211a under the action of buoyancy. When the water level is higher than the top sealing cover 211 and the dishwasher's circulation pump is working, the buoyancy member 2132 is pushed down by the water flow to close the vent hole 211a.

[0150] Thus, when the water level is lower than the top sealing cover 211 and the water contacts the buoyancy component 2132, the buoyancy component 2132 will open the vent 211a under the action of buoyancy, so that the gas in the filter inner cavity 11c can be discharged from the vent 211a. When the water level is higher than the top sealing cover 211 and the dishwasher's circulation pump is working, the water in the filter inner cavity 11c will flow under the action of the circulation pump, and drive the elastic sheet 2131 to close the vent 211a, thereby preventing water from directly entering the filter inner cavity 11c through the drain hole, so that water can only enter the filter inner cavity 11c through the cylindrical filter screen 212.

[0151] It should be noted that when the water level is lower than the top sealing cover 211, the buoyancy component 2132 will close the vent 211a under the action of gravity. The gas in the filter cavity 11c will be discharged from the filter holes of the cylindrical filter screen 212. The gas in the filter cavity 11c can open the vent 211a by pushing the buoyancy component 2132. At this time, the opening of the buoyancy component 2132 is very small, only for gas to be discharged, which can prevent water from directly entering the filter cavity 11c through the vent 211a.

[0152] Please see Figure 10 In some embodiments, the buoyancy member 2132 includes a sealing part 2133, a connecting part 2134, and a limiting part 2136. The sealing part 2133 is disposed on the upper surface of the top sealing cover 211 and is used to close the vent hole 211a. The connecting part 2134 is connected to the sealing part 2133 and passes through the vent hole 211a. The limiting part 2136 is connected to one end of the connecting part 2134 that passes through the vent hole 211a and is used to abut against the lower surface of the top sealing cover 211 to limit the upward movement of the buoyancy member 2132. The limiting part 2136 has a first venting channel 2137 communicating with the vent hole 211a.

[0153] Thus, after water comes into contact with the buoyancy member 2132, the buoyancy member 2132 will rise under the action of buoyancy to open the vent 211a. When the water level is higher than the vent 211a, the limiting part 2136 abuts against the lower surface of the top sealing cover 211 to limit the buoyancy member 2132 and prevent it from detaching from the vent 211a. At the same time, when the limiting part abuts against the top sealing cover 211, the air in the filter cavity 11c can be discharged from the vent 211a through the first vent channel 2137. It should be noted that after the limiting part 2136 abuts against the top sealing cover 211, the gas in the filter cavity 11c first passes through the first vent channel 2137, then enters the gap between the connecting part 2134 and the vent 211a and is discharged.

[0154] In some embodiments, the connecting portion 2134 has a second exhaust passage 2135, which connects the first exhaust passage 2137 and the exhaust port 211a. With this configuration, gas can be discharged not only through the gap between the connecting portion 2134 and the exhaust port 211a, but also through the second exhaust passage 2135, thereby improving the gas discharge efficiency.

[0155] In some embodiments, the upper end wall of the vent 211a is provided with a guide slope 2113. The inner diameter of the guide slope 2113 decreases from top to bottom, and the outer diameter of the upper end of the connecting portion 2134 decreases from top to bottom to match the guide slope 2113. With this configuration, when the buoyancy member 2132 closes the vent 211a under the action of water flow, the guide slope 2113 guides the sealing portion 2133 to seal the vent 211a, thereby preventing the sealing portion 2133 from being misaligned and causing the vent 211a to be not completely sealed. This improves the sealing accuracy of the buoyancy member 2132 and ensures that the buoyancy member 2132 can completely seal the vent 211a.

[0156] In some embodiments, the sealing part 2133 is provided with a sealing cap, the diameter of which is larger than the diameter of the vent hole 211a. The sealing cap abuts against the upper surface of the top sealing cover 211, and the upper surface of the sealing cap is inclined downward from the inside out. This arrangement allows the sealing cap to divert water from above, preventing water from directly entering the filter cavity 11c through the vent hole 211a. Furthermore, the larger diameter of the sealing cap compared to the vent hole 211a ensures a better seal for the vent hole 211a.

[0157] Please see Figure 9 In some embodiments, the buoyancy element 2132 is hollow. This design reduces the weight of the buoyancy element 2132, making it easier for water to float the buoyancy element 2132. At the same time, during the process of water entering the filter inner cavity 11c, due to the small weight of the buoyancy element 2132, gas can be better forced open by the buoyancy element 2132 and discharged from the vent 211a.

[0158] Please see Figure 11 In some embodiments, the lower surface of the top sealing cover 211 is recessed with an air guide groove 211b, which is arranged around the circumference of the exhaust hole 211a, and the groove wall of the air guide groove 211b is inclined from bottom to top towards the exhaust hole 211a. With this arrangement, the gas in the filter cavity will flow to the exhaust hole 211a under the guidance of the groove wall of the air guide groove 211b, thereby facilitating the discharge of gas from the filter cavity 11c.

[0159] In some embodiments, the top sealing cap 211 includes a cap body 2111 and an air guide portion 2112. The cap body 2111 covers the top of the cylindrical filter screen 212, and the air guide portion 2112 is connected to the lower surface of the cap body 2111. From bottom to top, the horizontal cross-section of the air guide portion 2112 increases. With this configuration, the air guide portion 2112 can guide the gas in the filter inner cavity 11c to the cylindrical filter screen 212, allowing the gas to be discharged through the filter holes of the cylindrical filter screen 212. This prevents the gas in the filter inner cavity 11c from forming an air cavity that affects the filtration efficiency of the cylindrical filter screen 212, thereby improving the filtration efficiency of the filter 21.

[0160] In some embodiments, the horizontal cross-section of the air guide 2112 gradually increases from bottom to top. This arrangement allows gas to be better guided along the outer surface of the air guide 2112 to the cylindrical filter screen 212, thereby ensuring the discharge of gas from the filter cavity 11c.

[0161] In some embodiments, the air guide portion 2112 has an air guide surface 2114 disposed opposite to the cover 2111, the air guide surface 2114 including an air guide inclined plane and / or an air guide inclined arc surface. With this configuration, gas can be better guided along the outer surface of the air guide portion 2112 to the cylindrical filter screen 212, thereby ensuring that gas in the filter inner cavity 11c is discharged.

[0162] In some embodiments, the air guiding surface 2114 includes an air guiding inclined plane, which is inclined upward from one side of the air guiding part 2112 to the opposite side. With this configuration, gas can be guided along the air guiding inclined plane to the cylindrical filter screen 212, thereby ensuring that the gas in the filter cavity 11c is discharged.

[0163] In some embodiments, the air guiding surface 2114 includes two inclined air guiding planes. The two inclined air guiding planes are arranged obliquely upward from the middle of the air guiding part 2112 to the outside of the air guiding part 2112. With this arrangement, the gas can be guided to the cylindrical filter screen 212 along the two inclined air guiding planes, thereby ensuring that the gas in the filter cavity 11c is discharged.

[0164] In some embodiments, the air guide 2112 includes a pyramidal air guide 2112 and the air guide surface 2114 includes a pyramidal surface. With this configuration, gas can be guided along the pyramidal surface to the cylindrical filter screen 212, thereby ensuring that the gas in the filter cavity 11c is discharged.

[0165] In some embodiments, the air guide portion 2112 includes a conical air guide portion 2112, and the air guide surface 2114 includes a conical surface. This configuration allows gas to be guided along the conical surface to the cylindrical filter screen 212, thereby ensuring that gas is discharged from the filter cavity 11c.

[0166] In some embodiments, the vertical center line of the pyramidal air guide 2112 or the conical air guide 2112 is collinear with the central axis of the filter 21. This configuration allows both the pyramidal and conical air guides 2112 to uniformly guide the gas within the filter cavity 11c to the cylindrical filter screen 212, thereby preventing gas from concentrating and causing blockage at the same location on the cylindrical filter screen 212, and thus improving the efficiency of gas discharge.

[0167] Please see Figure 11In some embodiments, the angle between the pyramidal or conical surface and the horizontal cross-section of the air guide 2112 is α, where 15°≤α≤75°. This arrangement allows for a larger inclination angle of the pyramidal or conical surface, which better guides the gas flow to the cylindrical filter 212, thereby improving the efficiency of gas discharge.

[0168] In some embodiments, the air guide 2112 and the cover 2111 are integrally formed. This configuration simplifies the structure of the filter device 100, thereby facilitating the assembly of the filter device 100, improving the production efficiency of the filter device 100, and reducing the cost of the filter device 100.

[0169] Please see Figure 9 In some embodiments, the filter 21 further includes a plurality of support ribs 2141, which are arranged at intervals along the circumference of the cover 2111 and surround the outer periphery of the air guide 2112, with their top ends connected to the lower surface of the cover 2111 and / or the air guide 2112; wherein the cylindrical filter screen 212 is arranged around the outer periphery of the plurality of support ribs 2141 or is clamped by the support ribs 2141. This arrangement improves the support strength of the filter 21 by providing the support ribs 2141. Simultaneously, clamping the cylindrical filter screen 212 with the support ribs 2141 or circling the cylindrical filter screen 212 around the support ribs 2141 reduces the need for connection structures, thereby simplifying the structure of the filter 21, improving the production efficiency of the filter device 100, and reducing the cost of the filter device 100.

[0170] In some embodiments, at least two of the cover 2111, air guide 2112, cylindrical filter screen 212, and support rib 2141 are integrally disposed. This arrangement simplifies the structure of the filter device 100, thereby facilitating the assembly of the filter device 100, improving the production efficiency of the filter device 100, and reducing the cost of the filter device 100.

[0171] Please see Figure 12 In some embodiments, the filter 21 further includes a lower support ring 2146 and a sealing ring 2147. The lower support ring 2146 is connected to the bottom end of a plurality of support ribs 2141, and its outer peripheral wall is recessed with an annular groove 21462. The sealing ring 2147 is installed in the annular groove 21462 and seals against the cavity wall of the water collection chamber 11b. With this configuration, the gap between the lower support ring 2146 and the water collection shell 1 can be sealed by the sealing ring 2147, thereby preventing water from directly entering the filter cavity 11c from the gap between the lower support ring 2146 and the water collection shell 1 of the cylindrical filter screen 212, thus improving the filtration effect of the filter device 100.

[0172] Please see Figure 3 and Figure 16In some embodiments, a snap fastener 21461 is provided on the side of the lower support ring 2146 opposite to the support ridge 2141, and a snap fastener groove 11r is provided on the cavity wall of the water collection chamber 11b, with the snap fastener 21461 engaging with the snap fastener groove 11r. With this configuration, during disassembly, the user only needs to rotate the filter 21 to disengage the snap fastener 21461 from the snap fastener groove 11r; during installation, the user only needs to rotate the filter 21 to engage the snap fastener 21461 with the snap fastener groove 11r, thus facilitating the user's disassembly, cleaning, or replacement of the filter 21.

[0173] In some embodiments, the cup 24 is positioned at the water inlet 11a, with its bottom abutting against and covered by the top sealing cover 211; alternatively, at least part of the bottom of the cup 24 is not covered by the top sealing cover 211 and is in a closed configuration. This configuration prevents residue in the annular outer cavity 11d from entering the cup 24 from the bottom due to buoyancy, thus ensuring the residue remains within the annular outer cavity 11d. When the drain pump operates, the residue is discharged along with the water in the annular outer cavity 11d, thereby improving the dishwasher's cleaning performance.

[0174] Understandably, the top sealing cap 211 can block the residue in the annular outer cavity 11d by covering the cup 24, thereby preventing the residue from entering the bottom of the cup 24 where it is covered by the top sealing cap 211.

[0175] Please refer to Figures 13 to 15 In some embodiments, the bottom of the cup 24 includes an overlapping region 2411 and a closed region 2412. The overlapping region 2411 is covered by a top sealing cap 211 and has a bottom filter hole 24c or is closed. The closed region 2412 is not covered by the top sealing cap 211 and is closed. This configuration, with the bottom filter hole 24c in the overlapping region 2411, can improve the filtration efficiency of the cup 24. It is understood that the top sealing cap 211 blocking the cup 24 can prevent residue from entering the overlapping region 2411, and thus prevent residue from entering the cup 24 from the bottom filter hole 24c.

[0176] Please see Figure 14 and Figure 15 In some embodiments, the cup-lifting filter hole 24a further includes a side filter hole 24d disposed on the peripheral sidewall of the cup-lifting 24. This configuration, by providing the side filter hole 24d, further improves the filtration efficiency of the cup-lifting 24, thereby increasing the filtration efficiency of the filter device 100 and improving the cleaning efficiency of the dishwasher.

[0177] Please see Figure 12In some embodiments, the axial distance between the top sealing cap 211 and the bottom of the water collection chamber 11b is H1, and the axial distance between the planar filter 23 and the bottom of the water collection chamber 11b is H2, where H1 < H2. This arrangement ensures that the top sealing cap 211 is located below the planar filter 23, thereby preventing the cleaning liquid from directly entering the filter inner cavity 11c through the cylindrical filter screen 212. Instead, the cleaning liquid first passes through the planar filter 23 and then through the cylindrical filter screen 212 into the filter inner cavity 11c, thus improving the filtration efficiency and accuracy of the filter 21.

[0178] In some embodiments, the axial distance between the top sealing cover 211 and the bottom of the water collection chamber 11b is H1, and the axial distance between the liquid level in the washing chamber and the bottom of the water collection chamber 11b is H3 when the circulation pump is working, wherein H1 < H3. This configuration ensures that the filter cavity 11c is filled with cleaning liquid when the circulation pump is working, thereby preventing a large amount of air in the water collection chamber 11b from affecting the operation of the circulation pump.

[0179] Please see Figure 5 In some embodiments, the inner diameter of the water collection chamber 11b is D1, and the outer diameter of the filter 21 is D2, wherein D2 ≥ 0.5D1. This allows the filter 21 to occupy a relatively large space within the water collection chamber 11b, thereby giving the filter 21 a larger filtration area, which improves the filtration efficiency of the filter 21 and ensures the amount of washing water supplied to the circulation pump 300.

[0180] Please see Figure 2 and Figure 3 In some embodiments, the filter device 100 further includes a drive assembly 4, which is connected to the rotating shaft 31. The drive assembly 4 drives the rotating shaft 31 to rotate, which in turn drives the push-suction blade 32 to rotate. The drive assembly 4 acts as a power source to provide power for the rotation of the push-suction blade 32, so that the rotation speed of the push-suction blade 32 meets the requirements, avoiding the push surface 331 from failing to generate sufficient radial thrust to push the washing water to flow in the opposite direction, or avoiding the suction surface 332 from failing to generate sufficient radial suction to draw in the washing water.

[0181] Specifically, the drive assembly 4 includes a first drive shaft 41, which passes through the water collection shell 1 and is connected to the rotating shaft 31 for transmission.

[0182] It is understood that the drive assembly 4 also includes a first drive element 42, which is located outside the water collection shell 1. Specifically, the first drive element 42 can be a pneumatic motor, a servo motor, a hydraulic motor, or a stepper motor, and no specific limitation is made here. The first drive element 42 being located outside the water collection shell 1 isolates it from the humid environment inside the shell, preventing moisture from entering and causing short circuits or corrosion of internal components. Simultaneously, it prevents leakage of lubricating oil from the first drive element 42, which could contaminate the washing water and affect the normal use of the washed tableware.

[0183] Optionally, the first drive shaft 41 is the output shaft 421 of the first drive component 42. That is, the output shaft 421 of the first drive component 42 directly drives the rotating shaft 31, saving the need for intermediate transmission components, shortening the power transmission path, and improving power transmission efficiency. Simultaneously, the first drive component 42 directly connects to the rotating shaft 31 through the water collection shell 1 via the output shaft 421, achieving integrated transmission between the motor and the rotating shaft 31. This improves the structural compactness between the drive assembly 4 and the rotating shaft 31, saves installation space, and provides more space to increase the volume of the washing chamber of the inner tank 200.

[0184] Optionally, the output shaft 421 of the first drive member 42 is connected to the first drive shaft 41. The connection between the output shaft 421 and the first drive shaft 41 can be achieved by a coupling. Compared with the direct rigid connection between the output shaft 421 and the rotating shaft 31, the vibration transmission between the first drive member 42 and the rotating shaft 31 can be reduced, and the noise generated inside the dishwasher when the push-suction vane 32 rotates can be reduced.

[0185] Optionally, in some embodiments, the drive assembly 4 further includes a transmission member 43, through which the output shaft 421 of the first drive member 42 is connected to the first drive shaft 41. The transmission member 43 can change the power transmission direction of the output shaft 421, so that the first drive member 42 can be adapted to different installation positions such as the bottom and side of the dishwasher, enhancing the compatibility of the drive assembly 4 with the overall structure.

[0186] Please continue reading. Figure 2 and Figure 3 Furthermore, in some embodiments, the filter device 100 further includes a base 5, which is disposed at the bottom of the water collection shell 1 and has an installation cavity; wherein, the transmission member 43 is installed in the installation cavity and the first driving member 42 is disposed on the base 5.

[0187] The base 5 serves to mount the transmission component 43 and also supports the water collection shell 1. The base 5 is made of high-strength engineering plastic or metal and is fixedly connected to the bottom of the shell or water collection shell 1 to improve bottom support strength. As an independent module, the base 5 can be pre-integrated with the transmission component 43, the first drive component 42, and electrical wiring to form a power module assembly before docking with the water collection shell 1, shortening installation time. Optionally, vibration damping pads are installed between the base 5, the water collection shell 1, and the shell to absorb the vibration energy generated by the first drive component 42 during operation, preventing noise and displacement caused by resonance during the operation of the filter device 100.

[0188] Specifically, the transmission component 43 includes one of the following: a gear transmission component, a rack and pinion transmission component, a connecting rod transmission component, a lead screw transmission component, and a belt transmission component.

[0189] Exemplarily, in some embodiments, the transmission component 43 includes a plurality of gears 431, which are sequentially meshed. The first drive shaft 41 and the output shaft 421 are respectively connected to different gears 431 among the plurality of gears 431. Optionally, the plurality of gears 431 can be a cylindrical gear set. The parallel design of the output shaft 421 and the first drive shaft 41 allows the first drive component 42 to be mounted on the periphery of the water collection shell 1, shortening the axial dimension occupied by the filter device 100 and thus reducing the overall height of the dishwasher. The plurality of gears 431 can also be a combination of bevel gears. By vertically mounting and meshing two bevel gears connected to the output shaft 421 and the first drive shaft 41, the vertical design of the output shaft 421 and the first drive shaft 41 is achieved. The installation position of the first drive component 42 can be selected according to the fit between the water collection shell 1 and the shell. If there is enough installation space between the periphery of the water collection shell 1 and the shell, the output shaft 421 and the first drive shaft 41 can be installed in parallel. If there is enough installation space between the bottom of the water collection shell 1 and the shell, the output shaft 421 and the first drive shaft 41 can be installed vertically.

[0190] It is understandable that when the output shaft 421 and the first drive shaft 41 are connected by a gear set, the output torque of the first drive component 42 can be adjusted by adjusting the gear ratio of the gear set. For example, with the gear 431 connected to the output shaft 421 as the driving gear and the gear 431 connected to the first drive shaft 41 as the driven gear, when the volume of the water collection chamber 11b is large, or the viscosity of the washing water after washing dishes is high, a gear set with a higher transmission ratio (transmission ratio = number of teeth of the driven gear / number of teeth of the driving gear) is used to amplify the output torque of the first drive component 42 and ensure that the push-suction vane 32 operates stably under the drive of the first drive shaft 41. When the volume of the water collection chamber 11b is small, or the viscosity of the washing water after washing dishes is low, a gear set with a lower transmission ratio is used to avoid the push-suction vane 32 rotating too fast and affecting the normal filtration of the washing water by the filter 21.

[0191] In another embodiment, the transmission component 43 includes a drive wheel, a driven wheel, and a transmission belt. The drive wheel is coaxially connected to the output shaft 421; the driven wheel is coaxially connected to the first drive shaft 41; the transmission belt is wound around the drive wheel and the driven wheel; and the output shaft 421 is parallel to the first drive shaft 41. Through the flexible transmission between the transmission belt and the drive and driven wheels, the torque of the output shaft 421 is transmitted to the first drive shaft 41, thereby enabling the first drive shaft 41 to drive the push-suction component 3 to rotate synchronously. Compared to the rigid transmission through gear meshing via gears 431, the flexible transmission between the transmission belt and the drive and driven wheels produces less noise, reducing the noise during dishwasher use and improving user comfort.

[0192] Correspondingly, the output shaft 421 is arranged parallel to the first drive shaft 41. Taking the vertical arrangement of the output shaft 421 and the first drive shaft 41 as an example, the transmission belt is wound around the driving wheel and the driven wheel in the horizontal direction. The mounting cavity of the base 5 can be arranged in a flat shape to reduce the axial height of the base 5 in the water collection shell 1. At the same time, the first drive member 42 can be installed on the periphery of the water collection shell 1, shortening the axial dimension occupied by the filter device 100, thereby reducing the overall height of the dishwasher.

[0193] Please see Figure 2 and Figure 17 In one embodiment, the bottom wall of the water collection chamber 11b is provided with a perforation 11f, the first drive shaft 41 passes through the perforation 11f along the axial direction of the filter 21, and the rotating shaft 31 is sleeved on the first drive shaft 41.

[0194] On one hand, by providing a perforation 11f on the bottom wall of the water collection cavity 11b, the first drive shaft 41 can pass through the perforation 11f into the water collection cavity 11b, with one end of the first drive shaft 41 located inside the water collection cavity 11b and the other end located outside the water collection cavity 11b. This allows the portion of the first drive shaft 41 located inside the water collection cavity 11b to be connected to the rotating shaft 31 for transmission. At the same time, the first drive member 42 can be connected to the portion of the first drive shaft 41 located outside the water collection cavity 11b for transmission, thus realizing the transmission connection between the rotating shaft 31 and the first drive member 42.

[0195] On the other hand, by directly connecting the rotating shaft 31 to the first drive shaft 41, the transmission path for synchronous rotation of the rotating shaft 31 and the first drive shaft 41 is shortened, thereby improving transmission efficiency. Specifically, the rotating shaft 31 is hollow in the axial direction to form a sleeve cavity, and the outer periphery of the first drive shaft 41 is provided with a limiting rib. The inner peripheral wall of the sleeve cavity is provided with a limiting groove, so that after the first drive shaft 41 passes through the sleeve cavity, the limiting rib is embedded in the limiting groove, thereby limiting the rotating shaft 31 relative to the first drive shaft 41 in the circumferential direction, and thus enabling the rotating shaft 31 to rotate synchronously when the first drive shaft 41 rotates. Along the axial direction of the rotating shaft 31, one side of the limiting groove extends through the end face of the rotating shaft 31, and the other side has an inner wall. The first drive shaft 41 is inserted into the sleeve cavity through the limiting groove extending through the end face of the rotating shaft 31 until the limiting rib abuts against the inner wall of the limiting groove along the axial direction of the rotating shaft 31, thereby achieving the sleeve connection between the rotating shaft 31 and the first drive shaft 41. Through the abutting cooperation between the inner wall of the limiting groove and the limiting rib, the installation height of the rotating shaft 31 on the first drive shaft 41 is limited.

[0196] Please see Figure 7 Furthermore, when the filter 21 includes a top sealing cover 211 and a cylindrical filter screen 212 disposed below the top sealing cover 211, one end of the first drive shaft 41 placed in the water collection chamber 11b is rotatably connected to the top sealing cover 211.

[0197] For the portion of the first drive shaft 41 placed within the water collection cavity 11b, its bottom passes through the perforation 11f and is rotatably connected to the water collection shell 1. If the top of the first drive shaft 41 is in a free state without being connected to other components, the portion near the top is prone to wobbling when the first drive shaft 41 rotates, affecting the pushing and sucking effect of the water-pushing component 3. By rotatably connecting one end of the first drive shaft 41 placed within the water collection cavity 11b to the top sealing cover 211, that is, rotatably connecting the top of the first drive shaft 41 to the top sealing cover 211, the top of the first drive shaft 41 is limited in the circumferential direction, improving the stability of the first drive shaft 41 during rotation.

[0198] Specifically, a top bearing 46 is installed at the bottom of the top sealing cover 211, and the top bearing 46 is sleeved on the top of the first drive shaft 41. The top bearing 46 includes an inner ring and an outer ring, forming an annular space between the inner and outer rings. Rolling elements such as balls, cylindrical rollers, tapered rollers, or spherical rollers are arranged in the annular space to allow relative rotation between the inner and outer rings. The outer ring is fixedly connected to the top sealing cover 211, and the inner ring is sleeved on the outer circumference of the first drive shaft 41 and fixedly connected to the first drive shaft 41, which both limits the movement of the first drive shaft 41 and ensures that the first drive shaft 41 can rotate freely relative to the top sealing cover.

[0199] It is understood that when the filter 21 includes the top sealing cover 211, the inlet 11a is connected to the annular outer cavity 11d, that is, the annular outer cavity 11d is used as the sewage cavity and the filter inner cavity 11c is used as the clean water cavity.

[0200] Correspondingly, when the inlet 11a is connected to the filter inner cavity 11c, that is, when the annular outer cavity 11d is used as the clean water cavity and the filter inner cavity 11c is used as the wastewater cavity, the top of the filter 21 is open, so that the washing water after washing the dishes can enter the filter inner cavity 11c through the inlet 11a at the top of the water collection shell 1. At this time, the push-suction water component 3 also includes a connector 36 connecting the push-suction water blade 32 and the rotating shaft 31. The first drive shaft 41 can be set at the bottom of the filter 21, the push-suction water blade 32 is set in the annular outer cavity 11d, the rotating shaft 31 is connected to the first drive shaft 41, and the push-suction water blade 32 extends radially along the bottom of the filter 21 to realize the connection between the rotating shaft 31 and the push-suction water blade 32. The first drive shaft 41 can also be inserted through the filter 21. The rotating shaft 31 is connected to the top of the first drive shaft 41 and is located above the filter 21. The push-suction blade 32 extends radially above the filter 21 to achieve the connection between the rotating shaft 31 and the push-suction blade 32.

[0201] Please see Figure 2 and Figure 17 Considering that the water collecting cavity 11b is used to collect washing water, the perforation 11f on the bottom wall of the water collecting cavity 11b has the problem of leakage of washing water. Therefore, in one embodiment, the outer bottom wall of the water collecting shell 1 is recessed to form an assembly groove 11h, and the perforation 11f communicates with the assembly groove 11h. The drive assembly 4 also includes an oil seal element 48 disposed in the assembly groove 11h; wherein, the first drive shaft 41 passes through the oil seal element 48, and the oil seal element 48 is used to seal the installation gap between the first drive shaft 41 and the perforation 11f.

[0202] The assembly groove 11h provides installation space for the oil seal element 48. The lip of the oil seal element 48 is interference-fitted with the first drive shaft 41 to form a radial clamping seal. The interference fit between the oil seal element 48 and the assembly groove 11h secures the oil seal element 48 within the groove, reducing the coaxiality error between the oil seal element 48 and the first drive shaft 41. This ensures that the contact pressure of the oil seal element 48's lip is evenly distributed circumferentially, preventing localized overload of the oil seal element 48. Simultaneously, it prevents washing water from leaking out through the gap between the oil seal element 48 and the inner wall of the assembly groove 11h. Specifically, the oil seal element 48 can be made of materials such as fluororubber or polyurethane.

[0203] Furthermore, the drive assembly 4 also includes a bottom bearing 47 disposed within the assembly groove 11h. The bottom bearing 47 is located on the side of the oil seal element 48 facing away from the through hole 11f and is sleeved on the first drive shaft 41. By providing the bottom bearing 47 on the side of the oil seal element 48 facing away from the through hole 11f, the radial runout of the first drive shaft 41 during rotation can be reduced, further reducing the coaxiality error between the oil seal element 48 and the first drive shaft 41. This, in turn, improves the uniformity of the contact pressure distribution of the lip of the oil seal element 48 in the circumferential direction, reduces the wear of the lip of the oil seal element 48, and extends the service life of the oil seal element 48.

[0204] In some embodiments, the drive assembly 4 further includes a second drive member and a second drive shaft. The second drive shaft passes through the water collection shell 1 and is connected to the filter 21. The second drive member is located outside the water collection shell 1 and is drive-connected to the second drive shaft.

[0205] Optionally, the filter 21 and the push-suction component 3 are coaxially arranged, allowing the first drive shaft 41 and the second drive shaft to pass through the same through hole 11f into the water collection shell 1. Simultaneously, the first drive shaft 41 passes inside the second drive shaft, allowing the first and second drive shafts to rotate freely relative to each other. This ensures that when the first drive component 42 and the second drive component drive the first drive shaft 41 and the second drive shaft respectively, they do not interfere with each other. The first drive component 42 and the second drive component can also be respectively located on the upper and lower sides of the water collection shell 1, so that the first drive shaft 41 and the second drive shaft do not overlap in the height direction of the water collection shell 1, thereby ensuring that the first drive shaft 41 and the second drive shaft do not interfere with each other when rotating.

[0206] When the filter inner cavity 11c is used as the clean water chamber and the annular outer cavity 11d is used as the wastewater chamber, driving the filter 21 to rotate causes the residue adsorbed on the outer surface of the filter 21 to detach from the filter 21 under the action of centrifugal force, thereby reducing the probability of the filter pores of the filter 21 being blocked. When the annular outer cavity 11d is used as the clean water chamber and the filter inner cavity 11c is used as the wastewater chamber, driving the filter 21 to rotate causes the wastewater (washing water mixed with residue) in the filter inner cavity 11c to rotate with the filter 21, forming a vortex. The residue gathers at the center of the filter inner cavity 11c, thereby reducing the probability of the filter pores of the filter 21 being blocked.

[0207] Specifically, the filter 21 is rotatably connected to the water collection shell 1 and rotates in the same direction as the push-suction water component 3, but the rotational speed of the push-suction water blade 32 is different from that of the filter 21. Of course, the filter 21 can also rotate in the opposite direction to the push-suction water component 3. By setting the filter 21 and the push-suction water component 3 to rotate in opposite directions, or to rotate in the same direction at different speeds, a speed difference is created between the filter 21 and the push-suction water component 3, preventing the filter 21 and the push-suction water component 3 from being relatively stationary when their rotational speeds are the same, which would cause the pushing action of the push surface 331 and the suction action of the suction surface 332 to fail.

[0208] Please see Figure 18 and Figure 19 Unlike the embodiment described above where the free end of the push-suction water element 3 is spaced apart from the filter 21, in some embodiments, the push-suction water blade 32 is in contact with the filter 21 at the free end of the filter 21.

[0209] By setting the free end of the push-suction vane 32 adjacent to the filter 21 to maintain contact with the filter 21, the push-suction vane 32 continuously scrapes the surface of the filter 21 as it rotates with the shaft 31, thereby removing residue from the filter holes of the filter 21 and reducing the probability of the filter holes of the filter 21 becoming clogged, thus ensuring the washing water filtration flow rate of the filter 21. Combined with the forced convection washing water formed between the push surface 331 and the suction surface 332 between the filter inner cavity 11c and the annular outer cavity 11d, the continuous scraping of the filter surface by the push-suction vane 32 can loosen food residue, oil stains, and other impurities attached to the filter 21, making it easier for the washing water flow pushed by the push surface 331 to flush away the impurities clogging the filter holes during the flow process.

[0210] As described above, the push-suction element 3 can be installed in either the inner cavity 11c or the annular outer cavity 11d of the filter. When the push-suction element 3 is installed in the inner cavity 11c of the filter, the free end of the push-suction blade 32 adjacent to the filter 21 contacts the inner surface of the filter 21, and the push-suction blade 32 continuously scrapes the inner surface of the filter 21 as it rotates with the shaft 31. When the push-suction element 3 is installed in the annular outer cavity 11d, the free end of the push-suction blade 32 adjacent to the filter 21 contacts the outer surface of the filter 21, and the push-suction blade 32 continuously scrapes the outer surface of the filter 21 as it rotates with the shaft 31. That is, regardless of whether the push-suction element 3 is installed in the inner cavity 11c or the annular outer cavity 11d of the filter, by setting the free end of the push-suction blade 32 adjacent to the filter 21 to contact the filter 21, the push-suction blade 32 continuously scrapes the surface of the filter 21 to remove residue from the filter holes of the filter 21 and reduce the probability of the filter holes of the filter 21 becoming clogged.

[0211] Please see Figure 19Optionally, in some embodiments, the push-suction blade 32 includes a blade body 33 and an elastic element 34; the blade body 33 is connected to the rotating shaft 31; the elastic element 34 is disposed at the end of the blade body 33 away from the rotating shaft 31 and contacts the filter 21.

[0212] By providing an elastic element 34 at the end of the blade body 33 away from the rotating shaft 31, the elastic element 34 is elastically compressed when it comes into contact with the filter 21, generating compressive deformation. This ensures that the elastic element 34 remains in contact with the filter 21 during the rotation of the push-suction blade 32, guaranteeing the scraping effect of the push-suction blade 32 on the filter 21. Simultaneously, when the push-suction blade 32 rotates, the elastic element 34 can absorb the vibration generated by contact with the filter 21 through elastic deformation, reducing the vibration frequency of the filter 21 and thus avoiding the risk of fatigue cracks in the filter 21.

[0213] Please see Figure 20 Furthermore, in some embodiments, the elastic element 34 is arranged in a sheet shape and extends along the axial direction of the filter 21.

[0214] Understandably, the push-suction blade 32 rotates circumferentially around the filter 21. By extending the elastic element 34 axially along the filter 21, the scraping range of the elastic element 34 after one rotation can cover the entire circumferential surface of the filter 21, avoiding scraping dead corners and improving the overall cleaning effect of the filter 21. By arranging the elastic element 34 in a sheet-like shape, the deformation capability of the elastic element 34 in the circumferential direction of the filter 21 is improved.

[0215] Specifically, there are multiple elastic elements 34, which are spaced apart and stacked on the same push-suction blade 32 in the rotation direction of the push-suction component 3. The more elastic elements 34 on the push-suction blade 32, the more times the elastic elements 34 scrape the filter 21 when the push-suction component 3 rotates once around the circumference of the filter 21, thus increasing the washing frequency of the filter 21 by the elastic elements 34. In the same rotation time, the more times the elastic elements 34 scrape the filter 21, the better the cleaning effect on the filter 21, thereby improving the unblocking rate of the filter pores of the filter 21.

[0216] Furthermore, in the rotation direction of the push-suction component 3, the contact pressure between the multiple elastic elements 34 on the same push-suction blade 32 and the filter 21 gradually decreases. This design can specifically remove residues with different adhesion strengths. In the rotation direction, the contact pressure between the elastic element 34 located at the front and the filter 21 is relatively small, which can remove residues with lower adhesion strength. The contact pressure between the elastic element 34 located at the rear and the filter 21 is relatively large, which can remove residues with higher adhesion strength. If the elastic element 34 at the front does not completely remove residues with lower adhesion strength, the elastic element 34 at the rear will scrape the residue again with a stronger scraping force, thereby improving the residue removal rate on the filter 21.

[0217] Optionally, in some embodiments, the blade body 33 and the elastic element 34 are integrally molded. By integrally molding the blade body 33 and the elastic element 34, the connection gaps that would occur with a separate design are eliminated. Stress concentration at the connection point between the blade body 33 and the elastic element 34 is avoided, thus preventing the elastic element 34 from detaching or breaking due to centrifugal force or impact between the elastic element 34 and the filter 21. Specifically, a two-color injection molding process can be used, that is, on the basis of integral molding, the blade body 33 and the elastic element 34 are made of the same material. The elastic element 34 is made of elastic material, and the blade body 33 includes a pushing surface 331 and a suction surface 332. To prevent deformation of the blade body 33 during rotation from affecting the pushing effect of the pushing surface 331 and the suction effect of the suction surface 332, the blade body 33 is made of a high-hardness material.

[0218] Optionally, the blade body 33 is made of plastic. Specifically, it can be a mixture of PP (Polypropylene) and GF (Glass Fiber), or PBT (Polybutylene terephthalate).

[0219] Please see Figure 23 Specifically, in some embodiments, the free end of the push-suction blade 32 adjacent to the filter 21 also has a water-blocking surface 333 that is disposed opposite to the filter 21 and whose shape is adapted to it. The water-blocking surface 333 is connected between the push-suction surface 331 and the suction surface 332.

[0220] The water-blocking surface 333 prevents water from immediately flowing back after being pushed out by the push surface 331, suppressing backflow and thus increasing the negative pressure effect, thereby improving the water absorption effect of the suction surface 332. Specifically, without the water-blocking surface 333, the water pushed out by the push surface 331 may, due to pressure changes, cause the water in the sewage chamber to quickly flow back to the clean water chamber from the end of the push surface 331, easily leading to chaotic water flow and affecting the overall working efficiency of the push-suction component 3. The water-blocking surface 333 suppresses backflow, allowing the water pushed out by the push surface 331 to more concentratedly flush the column filter screen 212, improving the unblocking effect. Simultaneously, the water-blocking surface 333 also increases the negative pressure effect. Because the water-blocking surface 333 blocks some backflow, the low-pressure effect around the suction surface 332 becomes more pronounced, increasing the negative pressure and further improving the water absorption effect of the suction surface 332.

[0221] Optionally, the elastic element 34 is disposed on the water-blocking surface 333. While scraping the filter 21, the elastic element 34 can also play the same water-blocking role as the water-blocking surface 333. Of course, the elastic element 34 can also be disposed on the water-pushing surface 331, or it can be disposed on both the water-blocking surface 333 and the water-pushing surface 331 at the same time, all of which can achieve the scraping effect on the filter 21.

[0222] In another embodiment, the push-suction blade 32 includes a blade body 33 and a brush head; the blade body 33 is connected to the rotating shaft 31; the brush head includes a plurality of bristles, disposed at the end of the blade body 33 away from the rotating shaft 31, and in contact with the filter 21. Similar to the function of the elastic element 34 described above, during rotation, the brush head of the push-suction blade 32 remains in contact with the filter 21, continuously washing the surface of the filter 21 to remove residue from the filter pores, reducing the probability of clogging the filter pores and ensuring the washing water flow rate of the filter 21.

[0223] Optionally, the outer diameter of the bristles is smaller than the pore diameter of the filter 21. By setting the outer diameter of the bristles to be smaller than the pore diameter of the filter 21, some bristles can pass through the pores of the filter 21 during the brushing process, directly pushing away the residue blocking the pores and further improving the unblocking rate of the filter 21.

[0224] Please see Figure 18 In some embodiments, the water-pushing component 3 includes multiple water-pushing blades 32, which are spaced apart in the circumferential direction of the filter 21.

[0225] Understandably, each push-suction blade 32 is equipped with an elastic element 34 or a brush head. The more push-suction blades 32 there are, the more times the elastic element 34 or brush head washes the filter 21 when the push-suction component 3 rotates once around the circumference of the filter 21, thus increasing the washing frequency of the filter 21. Within the same rotation time, the more times the elastic element 34 or brush head washes the filter 21, the better the cleaning effect on the filter 21, thereby improving the unblocking rate of the filter pores of the filter 21.

[0226] Meanwhile, each push-suction blade 32 is equipped with a push surface 331 and a suction surface 332. The more push-suction blades 32 there are, the more water is pushed by the push surface 331 of each push-suction blade 32 when the push-suction component 3 rotates once around the circumference of the filter 21, and the more water is sucked by the suction surface 332 of each push-suction blade 32, thus increasing the push-suction flow rate and the suction flow rate of the push-suction component 3. The increased push-suction flow rate enhances the flushing effect of the push-suction water flow on food residues, oil stains and other impurities clogging the filter holes, and the increased suction flow rate ensures that the filter device 100 can provide sufficient circulating washing water for the spray component 500.

[0227] Optionally, multiple push-suction blades 32 are arranged at equal intervals around the circumference of the filter 21. By arranging the multiple push-suction blades 32 at equal intervals, the total driving torque can be evenly distributed to each push-suction blade 32, thereby reducing the root stress at the connection between the push-suction blade 32 and the rotating shaft 31. At the same time, the symmetrical mass distribution of the multiple push-suction blades 32 when arranged at equal intervals reduces the vibration amplitude caused by the imbalance of centrifugal force between the push-suction blades 32 when the push-suction component 3 rotates.

[0228] It should be noted that the water collection shell 1 can be a water cup or a cup-shaped container placed inside a water cup; no specific limitation is made here. The following explanation uses the water collection shell 1 as a water cup.

[0229] Please see Figure 2 In this embodiment, the water cup has a water collecting cavity 11b and a water inlet 11a communicating with the water collecting cavity 11b; the filter 21 is disposed in the water collecting cavity 11b and divides the water collecting cavity 11b into a filter inner cavity 11c and an annular outer cavity 11d surrounding the outer periphery of the filter inner cavity 11c; the water cup also has an inner cavity outlet 11j communicating with the filter inner cavity 11c and an outer cavity outlet 11i communicating with the annular outer cavity 11d; one of the inner cavity outlet 11j and the outer cavity outlet 11i serves as a drain outlet and is used to communicate with a drain pump; the other of the inner cavity outlet 11j and the outer cavity outlet 11i serves as a circulating water outlet and is used to communicate with a circulating pump 300.

[0230] It is understood that the water collection chamber 11b is connected to the washing chamber of the inner tank 200 through the water inlet 11a, meaning that the washing water after cleaning flows into the water collection chamber 11b through the water inlet 11a. Specifically, the filter 21 divides the water collection chamber 11b into an inner filter chamber 11c and an annular outer chamber 11d surrounding the inner filter chamber 11c. The water inlet 11a can communicate with the annular outer chamber 11d, meaning that the washing water flows directly into the annular outer chamber 11d through the water inlet 11a. The filter 21 has filter holes for filtering residue. As the washing water in the annular outer chamber 11d flows into the inner filter chamber 11c through the filter holes, the residue in the washing water is blocked in the annular outer chamber 11d, so that the inner filter chamber 11c stores relatively clean washing water.

[0231] Correspondingly, the inner cavity outlet 11j serves as a circulating water outlet, connecting the circulating pump 300 and the filter inner cavity 11c. In washing mode, the circulating pump 300 re-transports the filtered washing water from the filter inner cavity 11c to the spray unit 500 to clean the dishes, achieving water reuse. The outer cavity outlet 11i serves as a drain outlet, connecting the drain pump and the annular outer cavity 11d. In drain mode, the drain pump discharges the washing water from the annular outer cavity 11d and the filter inner cavity 11c, as well as any residue from the annular outer cavity 11d, to the outside of the dishwasher.

[0232] Similarly, the inlet 11a can also be connected to the filter inner cavity 11c, meaning that the washing water flows directly into the filter inner cavity 11c through the inlet 11a. The filter 21 has filter holes for filtering residue. As the washing water in the filter inner cavity 11c flows into the annular outer cavity 11d through the filter holes, the residue in the washing water is blocked within the filter inner cavity 11c, resulting in relatively clean washing water stored in the annular outer cavity 11d. At this time, the inner cavity outlet 11j serves as a drain outlet, connecting the drain pump and the filter inner cavity 11c; the outer cavity outlet 11i serves as a circulating water outlet, connecting the circulating pump 300 and the annular outer cavity 11d.

[0233] Understandably, when the washing cycle stops, some washing water will remain in the pipe connecting the circulating water interface and the circulating pump 300. In drain mode, whether the inner cavity outlet 11j or the outer cavity outlet 11i is used as the drain outlet, the drain pump needs to discharge all the washing water from the annular outer cavity 11d and the filter inner cavity 11c to the outside of the dishwasher; that is, all the washing water in the water collection chamber 11b needs to be drained. If residue remains in the water collection chamber 11b, or if washing water remains at the circulating water interface, bacteria will grow, affecting the hygiene of the filter device 100.

[0234] Please see Figure 24Therefore, in some embodiments, in the height direction, the height of the inner bottom wall of the circulating water outlet, the height of the bottom wall of the water collection cavity 11b, and the height of the inner bottom wall of the drain outlet decrease sequentially.

[0235] By setting the height of the inner bottom wall of the drain outlet to be lower than the height of the bottom wall of the water collection chamber 11b, a height difference is created between the inner bottom wall of the drain outlet and the bottom wall of the water collection chamber 11b. When the drain pump is working, the residue deposited on the bottom wall of the water collection chamber 11b and the washing water in the water collection chamber 11b can be more easily discharged to the outside of the dishwasher through the drain outlet under the action of gravity and the suction of the drain pump. Similarly, by setting the height of the bottom wall of the water collection chamber 11b to be lower than the height of the inner bottom wall of the circulating water outlet, a height difference is created between the inner bottom wall of the water collection chamber 11b and the inner bottom wall of the circulating water outlet. When the drain pump is working, the washing water remaining at the circulating water outlet can more easily pass through the water collection chamber 11b and flow to the drain outlet under the action of gravity and the suction of the drain pump. This thoroughly removes residual water and residue from the water collection chamber 11b and the circulating water outlet, preventing bacteria growth in the filter device 100 due to residual water and residue.

[0236] Furthermore, in some embodiments, at any two positions on the bottom wall of the water collection cavity 11b, the height of one position relatively closer to the circulating water outlet is higher than or equal to the height of the other position.

[0237] Specifically, in the direction towards the circulating water outlet, the bottom wall of the water collecting chamber 11b is either flat or inclined upwards to prevent residual water at the circulating water outlet from being blocked by the bottom wall of the water collecting chamber 11b as it flows towards the drain. Correspondingly, in the direction towards the drain, the bottom wall of the water collecting chamber 11b can be inclined downwards so that the washing water and residue in the water collecting chamber 11b can be discharged from the dishwasher more quickly and smoothly through the drain under the action of gravity, avoiding the formation of dead corners for sedimentation on the bottom wall of the water collecting chamber 11b.

[0238] Please see Figure 2 and Figure 24 In some embodiments, the water cup includes a water cup body 11, a drain pipe 12, and a circulating water connector 13; a circulating water outlet and a drain outlet are provided on the water cup body 11; the drain pipe 12 is connected to the drain outlet and extends in a direction away from the water cup body 11, and is used to connect to a drain pump; the circulating water connector 13 is connected to the circulating water outlet and extends in a direction away from the water cup body 11, and is used to connect to a circulating pump 300.

[0239] Specifically, the drain pipe 12, the circulating water pipe 13, and the water cup body 11 are integrally formed to save installation steps between the drain pipe 12, the circulating water pipe 13, and the water cup body 11. At the same time, it can prevent water leakage caused by improper sealing at the connection between the drain pipe 12, the circulating water pipe 13, and the water cup body 11.

[0240] Furthermore, along the direction away from the water collection chamber 11b, the height of the inner bottom wall of the circulating water pipe 13 gradually increases.

[0241] As described above, when the washing mode stops, some washing water remains in the pipe connecting the circulating water interface and the circulating pump 300. The circulating water connector 13 is used to connect to the circulating pump 300. At the moment the circulating pump 300 stops running, there is still washing water flowing in the circulating water connector 13. By setting the height of the inner bottom wall of the circulating water connector 13 to gradually increase in the direction away from the water collection chamber 11b, the washing water flowing in the circulating water connector 13 can flow back into the water collection chamber 11b at the moment the circulating pump stops running, and is finally discharged out of the dishwasher by the drain pump, thus avoiding the residue of washing water in the circulating water connector 13.

[0242] Please continue reading. Figure 2 and Figure 24 In some embodiments, the annular outer cavity 11d is connected to the water inlet 11a, and the drain pipe 12 forms a drain cavity 12a and a slag collection cavity 12b that are connected to each other, and the slag collection cavity 12b is closer to the water collection cavity 11b than the drain cavity 12a; wherein, along the direction away from the water collection cavity 11b, the height of the bottom wall of the slag collection cavity 12b gradually decreases, and the height of the bottom wall of the drain cavity 12a gradually increases.

[0243] It should be noted that the annular outer cavity 11d is connected to the inlet 11a, meaning that the washing water flows directly into the annular outer cavity 11d through the inlet 11a. During the process of the washing water flowing from the annular outer cavity 11d into the filter inner cavity 11c through the filter holes, the residue in the washing water is blocked within the annular outer cavity 11d, resulting in relatively clean washing water stored in the filter inner cavity 11c. At this time, the outer cavity outlet 11i serves as a drain outlet connected to the drain pipe 12. By setting a sludge collection chamber 12b on the side of the drain pipe 12 near the water collection chamber 11b, the residue deposited at the bottom of the annular outer cavity 11d can fall into the sludge collection chamber 12b through the outer cavity outlet 11i, reducing the residue density within the annular outer cavity 11d and thus reducing the probability of the filter 21 becoming clogged. Meanwhile, the slag collection chamber 12b is directly connected to the drainage pump through the drainage chamber 12a, and is closer to the drainage pump than the annular outer chamber 11d. After the drainage pump is started, the suction force on the slag collection chamber 12b is stronger than that on the annular outer chamber 11d, and the residue deposited in the slag collection chamber 12b is more easily discharged.

[0244] Optionally, in some embodiments, the circulating water outlet and the drain outlet are respectively located on two opposite sides of the water cup.

[0245] Understandably, when the circulating water outlet and drain outlet are located on opposite sides of the water cup, the bottom wall of the water collection chamber 11b can be inclined downwards in the direction from the circulating water outlet to the drain outlet. This allows the washing water in the circulating water outlet and the water collection chamber 11b to flow smoothly to the drain outlet under gravity during the dishwasher's drain mode, and then be discharged outside the dishwasher by the drain pump. Simultaneously, this makes the flow direction of the washing water in the water cup more precise in both washing and drain modes, reducing the resistance of the piping system and thus improving the working efficiency of the circulating pump 300 and the drain pump.

[0246] Please continue reading. Figure 2 and Figure 24 In some embodiments, the water cup, i.e. the water collection shell 1, also has a drain outlet communicating with the annular outer cavity 11d, and a guide port 11q communicating with the filter inner cavity 11c and the drain outlet. A first one-way valve 15 is provided at the guide port 11q. The first one-way valve 15 only allows the filter inner cavity 11c to achieve one-way communication with the drain outlet through the guide port 11q.

[0247] As described above, when the annular outer cavity 11d is connected to the inlet 11a, the outer cavity outlet 11i serves as the drain outlet, and the inner cavity outlet 11j serves as the circulating water outlet. In drainage mode, the washing water from the annular outer cavity 11d and the filter inner cavity 11c needs to be discharged to the outside of the dishwasher through the drain outlet. By setting a guide port 11q connecting the drain outlet and the filter inner cavity 11c, the washing water in the filter inner cavity 11c can be discharged to the drain outlet more quickly and smoothly, and then discharged to the outside of the dishwasher by the drain pump. At the same time, a first one-way valve 15 is set at the guide port 11q, which only allows the filter inner cavity 11c to achieve one-way communication with the drain outlet through the guide port 11q, so as to avoid unfiltered washing water in the drain outlet directly flowing back into the filter inner cavity 11c through the guide port 11q in drainage mode, causing the filter inner cavity 11c to be contaminated. In washing mode, the first check valve 15 can be closed to prevent the washing water in the filter cavity 11c from being discharged to the drain through the guide port 11q, thus affecting the water intake of the circulation pump 300.

[0248] In another embodiment, the water cup, i.e. the water collection shell 1, also has a drain outlet communicating with the filter inner cavity 11c, and a guide port 11q communicating with the annular outer cavity 11d and the drain outlet. A first one-way valve 15 is provided at the guide port 11q. The first one-way valve 15 only allows the annular outer cavity 11d to achieve one-way communication with the drain outlet through the guide port 11q.

[0249] At this time, the outer cavity outlet 11i serves as the circulating water outlet, and the inner cavity outlet 11j serves as the drain outlet. By setting a connecting port 11q that connects the annular outer cavity 11d and the drain outlet, the washing water in the annular outer cavity 11d can be discharged to the drain outlet more quickly and smoothly, and then discharged to the outside of the dishwasher by the drain pump. At the same time, a first one-way valve 15 is set at the connecting port 11q, which only allows the annular outer cavity 11d to communicate with the drain outlet through the connecting port 11q, so as to prevent unfiltered washing water in the drain outlet from flowing back into the annular outer cavity 11d through the connecting port 11q in the drain mode, causing the annular outer cavity 11d to be contaminated. In the washing mode, the first one-way valve 15 can be closed to prevent the washing water in the annular outer cavity 11d from being discharged to the drain outlet through the connecting port 11q, which would affect the water intake of the circulating pump 300.

[0250] Please see Figure 25 In some embodiments, the bottom of the filter cavity 11c has a water outlet groove 11k that connects the filter cavity 11c with the water outlet 11j of the cavity. The flow cross section of the water outlet groove 11k is reduced along the water flow direction pointing to the water outlet 11j of the cavity.

[0251] When the inner cavity outlet 11j serves as the circulating water outlet, it is connected to the circulating pump 300. During operation, the circulating pump 300 continuously supplies washing water from the filter inner cavity 11c to the spray element 500. When the circulating pump 300 pumps in washing water, a negative pressure is created at the outlet tank 11k, with the negative pressure increasing closer to the inner cavity outlet 11j. This allows the washing water in the filter inner cavity 11c to flow towards the inner cavity outlet 11j under the influence of the pressure difference. By gradually decreasing the flow cross-section of the outlet tank 11k along the direction of water flow towards the inner cavity outlet 11j, the outlet tank 11k is made into a flared funnel shape facing away from the inner cavity outlet 11j. This disperses the negative pressure within the outlet tank 11k, preventing excessive local negative pressure from causing turbulence, reducing the effective fluid area of ​​the outlet tank 11k, and affecting the water flow rate at the inner cavity outlet 11j.

[0252] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," "right," etc., 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 application 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 application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0253] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A filter device for 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 in the water collection chamber, and the water collection chamber is divided into an inner filter cavity and an annular outer cavity that is arranged around the outer periphery of the inner filter cavity and communicates with the water inlet; as well as The push-suction water element is rotatably disposed in the inner cavity of the filter relative to the water collection shell. The push-suction water element includes a push surface and a suction surface disposed opposite to each other along the direction 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 to push the water out of the annular outer cavity.

2. The filtration device as described in claim 1, characterized in that, A high-pressure zone is formed between the water-pushing surface and the filter, and a low-pressure zone is formed between the water-absorbing surface and the filter.

3. The filtration device as described in claim 1, 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.

4. The filtration device as described 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°.

5. The filtration device as claimed in claim 1, characterized in that, The water-pushing surface is an inclined plane; or... The water-pushing surface is curved and recessed relative to the water-absorbing surface.

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

7. The filter device of the dishwasher as claimed in claim 1, characterized in that, The radial distance between the free end of the push-suction water element adjacent to the filter and the filter is greater than 0 mm and less than or equal to 10 mm.

8. The filter device of the dishwasher as claimed in claim 1, characterized in that, The inner diameter of the water collection chamber is D1, and the outer diameter of the filter is D2, wherein D2 ≥ 0.5D1.

9. The filter device of the dishwasher as claimed in claim 1, characterized in that, The push-suction water component 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. The arc lengths of the push surface, the suction surface, and the projection of the push-suction water blade onto the filter along the radial direction are a, b, and c, respectively, where 0.5≤a / c≤1 and 0.5≤b / c≤1.

10. The filtration device of a dishwasher as claimed in any one of claims 1 to 8, characterized in that, The push-suction water component 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-water surface and a suction-water surface. The filtration device also includes a drive assembly, which is connected to the rotating shaft via a drive mechanism.

11. The filter device of the dishwasher as claimed in claim 10, characterized in that, The drive assembly includes a first drive shaft, and the bottom wall of the water collection chamber is provided with a perforation. The first drive shaft passes through the perforation along the axial direction of the filter, and the rotating shaft is sleeved on the first drive shaft.

12. The filter device of the dishwasher as claimed in claim 11, characterized in that, The drive assembly further includes a first drive element, which is located outside the water collection shell; Wherein, the first drive shaft is the output shaft of the first drive component; or, The output shaft of the first drive unit is connected to the first drive shaft; or, The drive assembly further includes a transmission component, and the output shaft of the first drive component is connected to the first drive shaft via the transmission component.

13. The filter device of the dishwasher as claimed in claim 12, characterized in that, Also includes: A base is disposed at the bottom of the water collection shell, and the base has an installation cavity; The transmission component is installed in the mounting cavity, the first driving component is disposed on the base and located on the periphery of the water collection shell, and the output shaft is arranged parallel to the rotating shaft.

14. The filter device of the dishwasher as claimed in claim 10, characterized in that, The drive assembly further includes a second drive member and a second drive shaft. The second drive shaft passes through the water collection shell and is connected to the filter. The second drive member is located outside the water collection shell and is drively connected to the second drive shaft.

15. The filter device of the dishwasher as described in claim 14, characterized in that, The filter is rotatably connected to the water collection shell and rotates in the same direction as the water-pushing component, but the rotational speed of the water-pushing blades is different from that of the filter; or, The filter is rotatably connected to the water collection shell and rotates in the opposite direction to the push-suction water component.

16. The filtration device of the dishwasher as claimed in claim 11, characterized in that, The filter includes a top sealing cap and a cylindrical filter screen disposed below the top sealing cap.

17. The filter device of the dishwasher as claimed in claim 16, characterized in that, The top sealing cap has a vent hole, and the filter further includes a vent valve movably disposed at the vent hole, the vent valve being used to open or close the vent hole; When the water level is below the top sealing cover, the vent valve opens the vent hole to release the gas below the top sealing cover; when the water level is above the top sealing cover, the vent valve closes the vent hole.

18. The filtration device as claimed in claim 16, characterized in that, Also includes: A planar filter is disposed at the water inlet and located above the top sealing cover; Wherein, the axial distance between the top sealing cover and the bottom of the water collection chamber is H1, and the axial distance between the planar filter and the bottom of the water collection chamber is H2, wherein H1 < H2.

19. The filtration device as claimed in claim 16, characterized in that, The top sealing cap includes: A cover body, which is placed on top of the cylindrical filter screen; and An air guide is connected to the lower surface of the cover, and the horizontal cross-section of the air guide increases from bottom to top.

20. The filtration device as claimed in claim 16, characterized in that, Also includes: The cup is positioned at the water inlet, with its bottom abutting against the upper surface of the top sealing cap and being covered by the top sealing cap; Alternatively, the bottom of the cup is not covered by the top sealing cap and is in a closed configuration.

21. The filtration device as claimed in claim 16, characterized in that, The filter also includes: Multiple support ridges are arranged at intervals along the circumference of the top sealing cover, and their top ends are connected to the lower surface of the top sealing cover. The cylindrical filter screen is arranged around the plurality of supporting ridges. The outer periphery is either clamped by the supporting ridge.

22. The filtration device as claimed in claim 21, characterized in that, The filter also includes: A lower support ring is connected to the bottom ends of the plurality of support ridges, and its outer peripheral wall is recessed with an annular groove; and A sealing ring is installed in the annular groove and seals against the wall of the water collection chamber.

23. The filtration device as claimed in claim 22, characterized in that, The lower support ring has a buckle on the side opposite to the support ridge, and the wall of the water collection cavity has a buckle groove, with the buckle engaging with the buckle groove.

24. The filter device of the dishwasher as claimed in claim 1, characterized in that, The top surface of the push-suction water element is higher than the midpoint of the filter in the height direction.

25. The filter device of the dishwasher as claimed in claim 1, characterized in that, 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. The free end of the push-suction component adjacent to the filter also has a water-blocking surface that is opposite to the filter and adapted in shape, and the water-blocking surface is connected between the push-suction surface and the suction surface.

26. The filter device of the dishwasher as claimed in claim 1, characterized in that, The water collection shell also has a drain outlet communicating with the annular outer cavity, and a guide port communicating with the filter inner cavity and the drain outlet. A first one-way valve is provided at the guide port; the first one-way valve only allows the filter inner cavity to achieve one-way communication with the drain outlet through the guide port.

27. The filter device of the dishwasher as claimed in claim 1, characterized in that, Also includes: A planar filter is installed on top of the water collection shell, and the planar filter has an installation port; as well as A cup is installed at the mounting port. The cup has a filter groove with an open top and a cup filter hole connecting the filter groove and the annular outer cavity.

28. The filtration device of the dishwasher as claimed in claim 27, characterized in that, The filter aperture of the cup, the filter aperture of the planar filter, and the filter aperture decrease sequentially.

29. A dishwasher, characterized in that, include: The filtration device as described in any one of claims 1-28; The inner tank has a washing chamber that communicates with the water collection chamber; A circulation pump is connected to the inner cavity of the filter; as well as A drainage pump is connected to the annular outer cavity.

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