Filter device for a dishwasher and dishwasher

Abstract

The application discloses a filter device of a dishwasher and the dishwasher. The filter device comprises a water cup, a filter and a first one-way valve. The water cup has a water collecting cavity, a water inlet and a water outlet which are communicated with the water collecting cavity, and a guide opening for communicating the water outlet. The filter is arranged in the water collecting cavity and divides the water collecting cavity into a filter inner cavity and an annular outer cavity arranged outside the periphery of the filter inner cavity. The water cup has a guide opening for communicating the filter inner cavity and the annular outer cavity. The first one-way valve is arranged at the guide opening. The annular outer cavity is communicated with the water inlet, and the first one-way valve only allows the filter inner cavity to be communicated with the water outlet through the guide opening in one direction. Alternatively, the filter inner cavity is communicated with the water inlet, and the first one-way valve only allows the annular outer cavity to be communicated with the water outlet through the guide opening in one direction. The embodiment can improve the cleaning effect of the dishwasher.

Description

Technical Field

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

[0002] As an indispensable kitchen appliance in modern households, dishwashers are mainly used to clean tableware, cookware and other kitchen utensils. Their automatic dishwashing function greatly improves people's quality of life.

[0003] In existing technology, the filter screen divides the inner cavity of the water collection tank into sections to achieve the purpose of purifying the washing liquid and trapping residue. During the dishwasher's working cycle, the circulation phase needs to ensure that the residue trapped by the filter screen is effectively isolated from the circulating washing liquid, while the drainage phase needs to achieve the complete emptying of all residue and contaminated washing liquid in the water collection tank, including the complete drainage of residual liquid due to the circulation path.

[0004] If the circulation channel and drainage channel are physically separated, residual liquid in the circulation channel cannot be discharged during drainage. This leads to detergent retention and contamination, which not only reduces cleaning effectiveness and causes secondary contamination of tableware, but may also breed bacteria, affecting the dishwasher's lifespan and hygiene. Utility Model Content

[0005] This application provides a filter device for a dishwasher and a dishwasher, which can improve the cleaning effect of the dishwasher.

[0006] In a first aspect, embodiments of this application provide a filtration device for a dishwasher, comprising: A water cup has a water collecting cavity and a water inlet and a water outlet, both of which are connected to the water collecting cavity. The water cup also has a guide port for connecting to the water outlet. 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 surrounding the outer periphery of the inner filter cavity. The water cup also has a passage for connecting the inner filter cavity and the annular outer cavity. A first one-way valve is provided at the through port; Wherein, the annular outer cavity is connected to the water inlet, and the first one-way valve only allows the filter inner cavity to achieve one-way communication with the drain outlet through the guide port; or, the filter inner cavity is connected to the drain outlet, and the first one-way valve only allows the annular outer cavity to achieve one-way communication with the filter inner cavity through the guide port.

[0007] In one embodiment, the through-hole is lower than the inner cavity of the filter and the outer annular cavity.

[0008] In one embodiment, the first check valve includes: The first valve cover is rotatably disposed at the through port; When the dishwasher's circulation pump is operating, the first valve cover blocks the passage under the action of water flow; when the dishwasher's drain pump is operating, the first valve cover opens the passage under the action of water flow.

[0009] In one embodiment, the first check valve includes: A first valve seat is detachably connected to the through port and has a flow port communicating with the through port. A first valve cover is rotatably disposed on the first valve seat so as to open or close the through port by opening or closing the flow port.

[0010] In one embodiment, the projection of the flow port along its own axial direction is located within the conduction port.

[0011] In one embodiment, the first valve cover includes: A cover connector, connected to the first valve seat and located on one side of the flow port; and The cover body is rotatably connected to the cover connector to open and close the flow port.

[0012] In one embodiment, one of the cover connector and the first valve seat is provided with a snap-fit ​​protrusion, and the other of the cover connector and the first valve seat is provided with a snap-fit ​​through hole. The snap-fit ​​protrusion passes through the snap-fit ​​through hole to snap the cover connector and the first valve seat together.

[0013] In one embodiment, the first valve seat is disposed at the through port, and a sealing groove is provided on the outer peripheral sidewall of the first valve seat. The filtering device further includes: A sealing element, embedded in the sealing groove, is used to seal the assembly gap between the first valve seat and the wall of the through port.

[0014] In one embodiment, the water cup further has an inner cavity outlet communicating with the inner cavity of the filter. The inner cavity outlet is used to communicate with the drain pump or the circulation pump of the dishwasher. The bottom wall of the inner cavity of the filter has a water outlet groove communicating with the inner cavity of the filter and the guide port. Along the water flow direction pointing to the inner cavity outlet, the flow cross section of the water outlet groove is reduced.

[0015] In one embodiment, the water outlet has two first tank walls, and the distance between the two first tank walls decreases along the water flow direction pointing to the water outlet of the inner cavity, and the ends of the two first tank walls are respectively connected to the two side walls opposite to the water outlet of the inner cavity.

[0016] In one embodiment, the first tank wall satisfies one of the following conditions: Both of the first groove walls are curved surfaces or inclined planes; The two first tank walls are arranged symmetrically about the central axis of the water outlet of the inner cavity; The first tank wall transitions smoothly with the outlet wall of the inner cavity.

[0017] In one embodiment, the outer diameter of the filter is D2, and the distance between the two ends of the two first tank walls away from the outlet of the inner cavity is D3, wherein D2≥D3≥0.5D2.

[0018] In one embodiment, the inner diameter of the water collection cavity is D1, wherein D2 ≥ 0.5D1.

[0019] In one embodiment, the water outlet trough has a second trough wall, the two ends of which are respectively connected to the two ends of the first trough wall away from the water outlet of the inner cavity, and are arranged opposite to the water outlet of the inner cavity.

[0020] In one embodiment, the second groove wall is an arc-shaped groove wall and is recessed in the direction away from the water outlet of the inner cavity.

[0021] In one embodiment, the water cup further has an outer cavity outlet communicating with the annular outer cavity, the inlet communicating with the annular outer cavity and the outer cavity outlet being used to communicate with the drain pump of the dishwasher; or, the inlet communicating with the inner cavity of the filter and the outer cavity outlet being used to communicate with the circulation pump of the dishwasher; and A push-suction water element is rotatably disposed in one of the inner cavity of the filter and the outer annular cavity, which is not connected to the water inlet, relative to the water cup. The push-suction water element includes a push surface and a suction surface disposed opposite to each other along the direction of rotation of the push-suction water element. During the rotation of the push surface, there is a radial component of the pushing force on the water, and during the rotation of the suction surface, there is a radial component of the suction force on the water.

[0022] Secondly, embodiments of this application provide a dishwasher, comprising: The filtration device as described in any of the preceding items; The inner tank has a washing chamber that communicates with the water collection chamber; A circulating pump is connected to one of the annular outer cavity and the filter inner cavity; and The drain pump is connected to the annular outer cavity and another part of the filter inner cavity.

[0023] Based on the above embodiments, the water cup in this application embodiment also has a guide port for connecting to the drain outlet, and the filter device further includes a first one-way valve, which is disposed at the guide port.

[0024] If the annular outer cavity is connected to the inlet, and the first one-way valve only allows unidirectional flow between the filter inner cavity and the drain outlet through the guide port, that is, only the drainage path of the filter inner cavity as the clean water chamber is allowed to be unobstructed, while preventing any water flow from flowing back into the clean water chamber (filter inner cavity) through the guide port. Alternatively, if the filter inner cavity is connected to the inlet, and the first one-way valve only allows unidirectional flow between the annular outer cavity and the drain outlet through the guide port, that is, only the drainage path of the annular outer cavity as the clean water chamber is allowed to be unobstructed, while preventing any water flow from flowing back into the clean water chamber (annular outer cavity) through the guide port.

[0025] By installing a first one-way valve at the inlet of the water cup, the presence of the first one-way valve ensures the unidirectional flow of water during the drainage process of the filtration device. Specifically, depending on whether the inlet is connected to the annular outer cavity or the filter inner cavity, the first one-way valve only allows water to flow unidirectionally from the relatively clean side (whether it is the annular outer cavity or the filter inner cavity) through the inlet to the drain outlet, preventing dirty water or residual sewage from flowing back from the drain outlet into the clean water chamber through the first one-way valve.

[0026] First, by setting a first one-way valve, the water inside the annular outer cavity or the filter inner cavity, when used as a water purification chamber, can be discharged from the dishwasher during the drainage stage. This reduces the problem of incomplete drainage in the filter device and the easy accumulation of residual water, avoiding the possible bacterial growth and odor caused by water accumulation, thereby significantly improving the hygiene of the dishwasher.

[0027] Secondly, due to the restriction of the first one-way valve, water can only flow in a designated direction, which also prevents backflow of contaminants. During drainage or circulation, even with pressure fluctuations, water will not flow back from the inner chamber of the filter containing more impurities or the outer annular chamber into the relatively clean one. Attached Figure Description

[0028] 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.

[0029] Figure 1 This is a schematic diagram of the structure of a dishwasher according to one embodiment of this application (the base, outer shell, door, inner liner, and dish rack are omitted). Figure 2 for Figure 1 A partial structural diagram of the structure shown; Figure 3 for Figure 2 Cross-sectional view along the AA direction; Figure 4 This is a schematic diagram of the structure of a filtering device in one embodiment of this application; Figure 5 This is a schematic diagram of the primary filter and the filter structure in one embodiment of this application; Figure 6 This is a cross-sectional view of a filtering device in one embodiment of this application; Figure 7 for Figure 6 Cross-sectional view along the middle BB direction; Figure 8 for Figure 6 Cross-sectional view along the CC direction; Figure 9 This is a schematic diagram of the structure of the first check valve in one embodiment of this application; Figure 10 for Figure 9 Another structural diagram of the structure shown; Figure 11 This is a cross-sectional view of a water cup according to one embodiment of this application.

[0030] Explanation of icon numbers: 100. Filter device; 1. Water cup; 11. Water cup body; 11a. Inlet; 11b. Water collection chamber; 11c. Filter inner cavity; 11d. Annular outer cavity; 11e. Cavity bottom wall; 11f. Perforation; 11i. Outlet of outer cavity; 11j. Outlet of inner cavity; 11k. Outlet trough; 11o. First trough wall; 11p. Second trough wall; 11q. Through port; 12. Drain pipe; 12a. Drain chamber; 12b. Sludge collection chamber; 13. Circulating water connection pipe; 15. First one-way valve; 151. First valve cover; 1511. Cover connector; 1513. Snap-fit ​​protrusion; 1512. Cover body; 152. First valve seat; 152a. Flow port; 152c. Sealing groove; 2. Filter assembly; 21 1. Filter; 211. Top sealing cover; 211a. Vent hole; 212. Cylindrical filter screen; 213. Vent valve; 214. Support frame; 22. Primary filter; 23. Planar filter; 23a. Mounting port; 24. Lifting cup; 24a. Filter tank; 24b. Lifting cup filter hole; 3. Push suction component; 31. Rotating shaft; 32. Push suction blade; 331. Pushing surface; 332. Suction surface; 36. Connecting component; 4. Drive assembly; 41. First drive shaft; 42. First drive component; 421. Output shaft; 43. Transmission component; 432. Drive wheel; 433. Driven wheel; 5. Base; 300. Circulation pump; 500. Spray component; 510. Upper spray arm; 520. Middle spray arm; 530. Lower spray arm.

[0031] 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

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] A dishwasher is an automatic dishwashing device widely used in home and commercial kitchens. It thoroughly cleans and disinfects dishes using high-temperature, high-pressure water jets, detergent, and a circulation system.

[0037] The dishwasher's workflow mainly includes the following steps: When the dishwasher starts, a water pump draws water from the tank and heats it to a suitable temperature via a heater to improve cleaning effectiveness and help break down grease. The heated water is then sprayed onto the tableware surface through nozzles on the spray arms, using high-pressure water flow and rotating nozzles to wash away food residue and grease. The spray arms are designed to ensure that the water flow reaches every corner of the tableware for comprehensive cleaning. Furthermore, the dishwasher has an internal water circulation system; used water is filtered and returned to the spray arms to reduce water consumption and improve cleaning efficiency. The filtration system in the circulating water system captures food particles and impurities in the water, preventing them from redepositing on the tableware.

[0038] Furthermore, after washing, the wastewater is drained from the dishwasher via a drain pump, and then the dishes enter the drying stage. The drying system typically uses hot air or convection to quickly dry the dishes, preventing water residue and reducing bacterial growth. Some dishwashers also have an air filtration system to filter the air in the washing chamber, preventing the spread of odors and bacteria and improving overall hygiene.

[0039] This embodiment proposes a dishwasher, including a base, a housing, and a door. The base is the supporting structure of the dishwasher, typically made of metal, and has good load-bearing capacity and stability. The housing is connected to the base and serves as the external protective layer of the dishwasher; it can be made of stainless steel or cold-rolled thin steel sheet. The door is movably connected to the housing, for example, by flipping it open and close. The door is the closed structure of the dishwasher, and its perimeter can be connected with sealing strips to prevent moisture leakage. The user places the dishes to be washed into the dishwasher by opening the door. An observation window can be provided on the door, allowing the user to observe the operation of the dishwasher inside when it is closed.

[0040] The dishwasher also includes an inner tub housed within the outer casing and at least one dish rack. The inner tub forms a washing chamber and can be made of stainless steel sheet, offering good corrosion resistance and durability. At least one dish rack is retractable within the washing chamber. Multiple dish racks can be arranged at intervals along the height of the dishwasher. The dish racks are used to hold dishes to be washed. During use, the user opens the door and pulls the dish rack outwards to place the dishes inside. After placing the dishes, the user pushes the dish rack back into the washing chamber and closes the door.

[0041] like Figure 1 As shown, the dishwasher also includes a spray unit 500, a drain pump, a circulation pump 300, and a filter device 100. The spray unit 500 is disposed on the cavity wall of the washing chamber. The spray is driven to rotate by a motor, spraying heated water onto the surface of the tableware at high pressure to ensure that the tableware is thoroughly cleaned. It can evenly spray water onto different parts of the tableware to improve the cleaning effect. The spray unit 500 includes an upper spray arm 510, a middle spray arm 520, and a lower spray arm 530. The upper spray arm 510, the middle spray arm 520, and the lower spray arm 530 are arranged at intervals along the height direction of the dishwasher. For example, there are two dish racks, namely an upper dish rack and a lower dish rack. The upper dish rack is located between the upper spray arm 510 and the middle spray arm 520, and the lower dish rack is located between the middle spray arm 520 and the lower spray arm 530. The upper spray arm 510 can spray spray water towards the upper dish rack, the lower dish rack can spray washing water towards the lower dish rack, and the middle spray arm can spray spray water towards both the upper and lower dish racks.

[0042] Both the circulation pump 300 and the drain pump are connected to the filter device 100. The circulation pump 300 is also connected and communicates with the spray unit 500. During the dishwasher's washing cycle, food residue and grease on the dishes enter the dishwasher's filter device 100 along with the washing water. The filter device 100 is located on the bottom wall of the washing chamber and is sealed to the inner tub. It can be roughly located in the center of the bottom wall of the chamber, and the circumferential bottom wall of the chamber can gradually slope towards the filter device 100 so that the washing water flows into the filter device 100 along the slope of the bottom wall. The main function of the filter device 100 is to filter impurities and food residue in the water, preventing them from entering the circulation pump 300 and being sprayed onto the dishes again, thus ensuring the washing effect and the normal operation of the circulation system. The circulating water drawn by the circulation pump 300 can be sprayed onto the surface of the dishes multiple times through the spray unit 500, ensuring that stains and grease are thoroughly removed and improving the cleaning effect. Furthermore, since recycled water can be reused multiple times, it can reduce the amount of detergent used, lower cleaning costs, and reduce environmental pollution.

[0043] The function of the drain pump is to drain the wastewater from the dishwasher after washing. It can be installed at the bottom of the dishwasher and connected to the floor drain. It can suck in the wastewater and discharge it to the floor drain.

[0044] like Figure 2 and Figure 3 As shown, in some embodiments, the filtration device 100 includes a water cup 1 (also called a water collection unit) and a filter assembly 2. The water cup 1 is used to collect and store washing water and provides space for subsequent water filtration and water circulation. The water cup 1 has a water collection chamber 11b and a water inlet 11a communicating with the water collection chamber 11b. The water inlet 11a is located on the upper surface of the water cup 1. It can be seen that the water collection chamber 11b is connected to the washing chamber through the water inlet 11a. The washing water in the inner tank will collect into the water cup 1. The filter assembly 2 is responsible for filtering the collected washing water.

[0045] like Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the filter assembly 2 includes a primary filter 22 and a filter 21. The primary filter 22 includes a flat filter 23 and a cup 24. The flat filter 23 is flat and is disposed on the bottom wall of the washing chamber. In this embodiment, the flat filter 23 is a square flat filter 23. The flat filter 23 is located above the water inlet 11a of the water cup 1 and is spaced apart from the water cup 1. That is, the covering area of ​​the flat filter 23 is larger than the diameter of the water inlet 11a of the water cup 1, which can prevent larger debris from falling directly into the water collection chamber 11b of the water cup 1 and bypassing the primary filter. The flat filter 23 has an installation port 23a, which is located approximately in the middle of the flat filter 23 and is connected to the water inlet 11a. The cup 24 is detachably installed in the installation port 23a. Part of the cup 24 overlaps the upper surface of the flat filter 23, and the other part is located in the water collection chamber 11b, which is convenient for the user to access and remove the cup 24 to pour out food residue and other dirt. To make it easier for users to take out the cup 24, in some designs the cup 24 may also be equipped with a handle.

[0046] Furthermore, the upper surface of the flat filter 23 is inclined downwards from all sides towards the mounting port 23a, meaning that the upper surface of the flat filter 23 can guide the washing water after cleaning towards the cup 24, thereby concentrating the water flow. The upper surface of the cup 24 is roughly flush with the surface of the flat filter 23 at the mounting port 23a. The cup 24 has a filter groove 24a, on which multiple cup filter holes 24b are provided. The filter groove 24a has a circumferentially extending sidewall and a bottom connected to the sidewall. The cup filter holes 24b include bottom filter holes on the bottom and side filter holes on the sidewall. The bottom filter holes and side filter holes are mainly responsible for intercepting larger food particles, such as bone fragments and large vegetable leaves. This protects the subsequent finer filter from being clogged by large debris, reducing its burden and improving the overall filtration efficiency. The detachable design of the cup 24 makes it easy to lift and allows users to regularly clean the accumulated food residue. It also constitutes the main structure of the primary filter 22. The relatively clean water that has passed through the lifting cup 24 will continue to flow to or pass through the lifting cup 24 for further fine filtration.

[0047] The filter 21 is located below the cup 24. The filter 21 can be cylindrical, conical, or other shapes suitable for filtration. Taking a cylindrical filter as an example, it is cylindrical in shape. The central axis of the filter 21 can coincide with the central axis of the cup 24. The filter 21 includes a support frame 214 and a cylindrical filter screen 212 disposed on the peripheral wall of the support frame 214. The pore size of the cylindrical filter screen 212 is smaller than the pore size of the cup filter hole 24b. The smaller pore size of the cylindrical filter screen 212 can perform secondary interception of the washing water after passing through the cup 24. The filter 21 is vertically disposed in the water collection cavity 11b of the water cup 1. The central axis of the filter 21 can coincide with the central axis of the water collection cavity 11b. The filter 21 divides the water collection cavity 11b into an inner filter cavity 11c and an annular outer cavity 11d surrounding the outer periphery of the inner filter cavity 11c. The inner filter cavity 11c can be said to be defined by the filter 21, and the inner filter cavity 11c extends through the bottom of the filter 21. This design enables filter 21 to effectively filter impurities in water. Furthermore, depending on different application scenarios and design requirements, filters of various shapes, such as conical filters, can be selected to adapt to different spatial layouts and filtration effect requirements. Cylindrical filters are widely used due to their simple structure and stable filtration effect, but this technical solution is not limited to cylindrical shapes; other suitable filter shapes are also applicable to this application.

[0048] In this embodiment, the cup 24 can be disc-shaped or near-disc-shaped. In other embodiments, the cup 24 can be arc-shaped, and the shape and size of the mounting port 23a are adapted to it. The mounting port 23a extends in a discontinuous, multi-segment arc shape, and multiple filter grooves 24a on the cup 24 are spaced apart along the extension direction of the arc segment. Each filter groove 24a has two peripheral sidewalls that are opposite to each other along the extension direction of the arc segment, and a bottom connecting the two peripheral sidewalls. Furthermore, the planar filter 23 is also provided with a central hole. The mounting port 23a is semi-circularly disposed in the central hole, and the filter 21 is disposed at the central hole. The upper end face of the filter 21 is lower than the upper end face of the cup 24, and the filter 21 is located in the middle of the cup 24. That is, the cup 24 is semi-circularly disposed on the outer periphery of the filter 21.

[0049] like Figure 2 , Figure 3 and Figure 4As shown, it should be noted that the inlet 11a can be connected to either the filter inner cavity 11c or the annular outer cavity 11d. That is, one of the filter inner cavity 11c and the annular outer cavity 11d serves as the wastewater chamber, while the other serves as the clean water chamber. Specifically, the first configuration is that the inlet 11a is connected to the filter inner cavity 11c. In this setting, the liquid to be filtered (e.g., water containing impurities) first enters the filter inner cavity 11c. Subsequently, the liquid flows outward through the filter 21 (which has a cylindrical filter screen 212) and enters the annular outer cavity 11d surrounding the inner cavity. During this process, impurities larger than the filter screen pore size are trapped and adhere to the inner side of the cylindrical filter screen 212 (i.e., the side facing the filter inner cavity 11c). This inside-out filtration method ensures that the clean filtrate exists in the annular outer cavity 11d, which serves as the clean water chamber, while the filter inner cavity 11c serves as the wastewater chamber.

[0050] The second configuration is the opposite, with the inlet 11a connected to the annular outer cavity 11d. The liquid to be filtered first enters the annular outer cavity 11d. Then, the liquid needs to flow inward through the filter 21 into the filter inner cavity 11c. At this time, the trapped impurities adhere to the outer side of the cylindrical filter screen 212 (i.e., the side facing the annular outer cavity 11d). This filtration method from the outside in ensures that the clean filtrate exists in the filter inner cavity 11c, which is the clean water chamber, while the annular outer cavity 11d is the wastewater chamber.

[0051] This long-term stable or unidirectional water flow pattern creates conditions for the continuous adhesion and accumulation of impurities. Over time, the impurity particles trapped inside or outside the filter 21 (depending on the specific configuration) will gradually increase, aggregate, and even stick together, forming a relatively stable sediment layer. Whether the cylindrical filter screen 212 is clogged or the surface of the cylindrical filter screen 212 is covered with sediment, it will significantly reduce the effective filtration area and water flow path, increasing the resistance of water flow through the filter 21. As the water flow resistance increases, the filtration speed will slow down, the amount of liquid processed per unit time will decrease, and the overall filtration efficiency will decrease. In extreme cases, the filter 21 may completely fail, and the water in the filter inner cavity 11c and the annular outer cavity 11d cannot be exchanged normally.

[0052] like Figure 2 , Figure 3 and Figure 4As shown, to solve the above problems, the filtration device 100 also includes a push-suction water component 3, a drive assembly 4, and a base 5. The base 5 is used to install the drive assembly 4, providing a stable mounting platform for the drive assembly 4 and ensuring that the drive assembly 4 can be reliably fixed in the working position. The drive assembly 4 is used to drive the push-suction water component 3 to rotate. The drive assembly 4 includes a first drive component 42, a transmission component 43, and a first drive shaft 41. The bottom wall 11e of the water collection cavity 11b is provided with a perforation 11f. The first drive shaft 41 passes through the perforation 11f and is installed in the water collection cavity 11b. The first drive component 42 is a motor and has an output shaft 421 for generating rotational power. The base 5 is provided with a mounting cavity, and the transmission component 43 can be installed in the mounting cavity. The transmission component 43 may include a driving wheel 432 and a driven wheel 433. The first drive shaft 41 rotates under the transmission of the driven wheel 433. The transmission component 43 transmits the power from the output shaft 421 of the first drive component 42 to the first drive shaft 41.

[0053] The push-suction component 3 is rotatably disposed in the inner cavity 11c and the annular outer cavity 11d of the filter, and is not connected to the inlet 11a. The push-suction component 3 passes through the water cup 1 and extends into the water collection cavity 11b. The push-suction component 3 includes a push surface 331 and a suction surface 332 disposed opposite to each other along the direction of the push-suction component 3. Both the push surface 331 and the suction surface 332 can extend along the height direction of the filter 21. During the rotation of the push surface 331, there is a radial component of the pushing force on the water. During the rotation of the suction surface 332, there is a radial component of the suction force on the water.

[0054] The push-suction water component 3 includes a rotating shaft 31 and a push-suction water blade 32. The rotating shaft 31 is sleeved on the first drive shaft 41 and can rotate under the drive of the first drive shaft 41. The rotating shaft 31 has a top end, and the push-suction water blade 32 is set on the side relatively close to the top end. The relative position of the push-suction water blade 32 and the filter 21 is different. The direction of water flow through the cylindrical filter screen 212 (outer → inner or inner → outer), that is, one of the filter inner cavity 11c and the annular outer cavity 11d is connected to the water inlet 11a, determines whether the water quality of the filter inner cavity 11c or the annular outer cavity 11d is better.

[0055] In one configuration, water filtered by the primary filter 22 flows into the annular outer cavity 11d, while the push-suction blades 32 of the push-suction component 3 are configured to rotate completely within the filter 21, meaning both the push surface 331 and the suction surface 332 are located within the filter inner cavity 11c. When water carrying impurities passes through the filter 21 (entering the filter inner cavity 11c from the annular outer cavity 11d), larger impurities are intercepted on the outer periphery of the filter 21 (i.e., the side facing the annular outer cavity 11d). If these impurities accumulate, they will quickly clog the filter screen, reducing filtration efficiency. When the push-suction component 3 rotates within the filter inner cavity 11c, the push surface 331 exerts a radial component of the pushing force on the water during rotation, pushing the water out of the annular outer cavity 11d, while the suction surface 332 exerts a radial component of the suction force on the water during rotation, drawing the water into the filter inner cavity 11c. Specifically, the water-pushing surface 331 impacts and pushes away impurities attached to the outer wall of the filter 21, thereby maintaining the smooth flow of water between the filter inner cavity 11c and the annular outer cavity 11d and extending the effective working time of the filter 21. Meanwhile, the water-absorbing surface 332 draws water from the annular outer cavity 11d into the filter inner cavity 11c. The water flow needs to pass through the cylindrical filter screen 212 with a smaller pore size for secondary filtration. Impurities are trapped on the outside of the cylindrical filter screen 212, while relatively clean water enters the filter inner cavity 11c defined by the filter 21, improving the water flow filtration efficiency between the annular outer cavity 11d and the filter inner cavity 11c.

[0056] In another configuration, water filtered by the primary filter 22 flows into the filter inner cavity 11c, while the rotating shaft 31 of the push-suction component 3 is located within the filter inner cavity 11c. The push-suction blade 32 extends to the outside of the filter 21, meaning that both the push surface 331 and the suction surface 332 are located within the annular outer cavity 11d. The push-suction blade 32 can rotate around the circumference of the filter 21. When water carrying impurities passes through the cylindrical filter screen 212, larger impurities are intercepted on the inner side. If these impurities accumulate, they will quickly clog the filter screen, reducing filtration efficiency and even causing excessive water pressure in the inner cavity. When the push-suction component 3 rotates within the annular outer cavity 11d, the radial suction force of its suction surface 332 effectively guides and filters the filtered water into the annular outer cavity 11d, improving the utilization efficiency of the circulating water. The water-pushing surface 331 pushes water out to the annular outer cavity 11d. The thrust helps to slightly pull on the impurities attached to the inner side of the cylindrical filter screen 212, preventing the impurities from adhering firmly to the filter screen and preventing them from forming a stable blockage layer. Through this continuous interference, even if impurities are intercepted, they are difficult to accumulate over a long period of time and a large area, thereby maintaining the smooth flow of water between the filter inner cavity 11c and the annular outer cavity 11d and extending the effective working time of the filter 21.

[0057] Specifically, in this configuration, the rotating shaft 31 passes through the filter 21 and is rotatably connected to the water cup 1. The push-suction water component 3 also includes a connector 36. One end of the connector 36 is connected to the top of the rotating shaft 31 passing through the filter 21, and the connector 36 extends radially along the filter 21. The push-suction water blade 32 is connected to the other end of the connector 36 and extends toward the bottom wall 11e of the water collection chamber 11b. The output shaft 421 of the drive assembly 4 drives the rotating shaft 31 to rotate. One end of the rotating shaft 31 passes through the filter 21 and is connected to the push-suction vane 32 through the connector 36. This allows the rotating shaft 31 to drive the connector 36, which in turn drives the push-suction vane 32 to move in the annular outer cavity 11d. The water in the filter inner cavity 11c is drawn into the annular outer cavity 11d by the water suction surface 332. This allows the filter 21 to effectively intercept food residue in the water. The water in the annular outer cavity 11d is pushed out of the filter inner cavity 11c by the push-suction surface 331, which pushes away food residue attached to the inner surface of the filter 21. This reduces the probability of food residue blocking the water flow to the annular outer cavity 11d, thus achieving self-cleaning of the filter 21.

[0058] The water cup 1 also has an inner cavity outlet 11j that communicates with the inner cavity 11c of the filter, and an outer cavity outlet 11i that communicates with the annular outer cavity 11d. Understandably, the inner cavity outlet 11j is used to discharge the washing water in the inner cavity 11c of the filter, while the outer cavity outlet 11i is used to discharge the washing water in the annular outer cavity 11d.

[0059] Therefore, depending on the different configurations described above, the circulating pump 300 can be connected to one of the filter inner cavity 11c (inner cavity outlet 11j) and the annular outer cavity 11d (outer cavity outlet 11i), while the drain pump can be connected to the other of the filter inner cavity 11c (inner cavity outlet 11j) and the annular outer cavity 11d (outer cavity outlet 11i). That is, one of the inner cavity outlet 11j and the outer cavity outlet 11i can serve as a drain outlet and be used to connect with the drain pump, while the other of the inner cavity outlet 11j and the outer cavity outlet 11i serves as a circulating water outlet and is used to connect with the circulating pump 300.

[0060] In other words, if the water in the filter's inner chamber 11c undergoes a more refined secondary filtration, the water quality is relatively cleaner and suitable for recycling. Therefore, the inner chamber outlet 11j will serve as the circulating water outlet and be connected to the recirculating system. The annular outer chamber 11d mainly contains washing water that still contains a significant amount of larger impurities after the initial filtration, as well as fine impurities trapped during the secondary filtration process. During the drainage stage, these impurities need to be discharged from the dishwasher. The drain pump is connected to the annular outer chamber 11d, meaning that the outer chamber outlet 11i serves as the drain outlet at this time.

[0061] If the water in the annular outer cavity 11d is cleaner than the water in the filter inner cavity 11c, then the circulation pump 300 is connected to the annular outer cavity 11d. In this case, the outer cavity outlet 11i serves as the circulating water outlet, while the filter inner cavity 11c becomes an area with relatively more impurities (because the impurities are blocked inside the cylindrical filter screen 212). This part of the water needs to be discharged during the drainage stage. Therefore, the drainage pump is connected to the filter inner cavity 11c, and the inner cavity outlet 11j serves as the drainage outlet for drainage.

[0062] Understandably, the water with better quality in either the filter inner cavity 11c or the annular outer cavity 11d is connected to the circulation pump 300, while the other is connected to the drain pump.

[0063] In related technologies, during the circulating water washing stage of a dishwasher, to ensure that the washing water sprayed onto the dishes is relatively clean, the filter 21 needs to effectively intercept residue, requiring a good separation between the filtered clean area and the residue-containing dirty area. However, during the drainage stage, all washing water within the filter device 100 needs to be drained, including the circulating water filtered by the filter 21. If the design of the filter device 100 overemphasizes isolation during the circulation stage—for example, if the clean area and the dirty area are completely and physically separated—difficulties will arise during drainage.

[0064] like Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, in order to solve the above problems, in this embodiment, the water cup 1 also has a guide port 11q for connecting to the drain outlet, and the filter device 100 also includes a first one-way valve 15, which is disposed at the guide port 11q.

[0065] If the annular outer cavity 11d is connected to the inlet 11a, and the first one-way valve 15 only allows the filter inner cavity 11c to be unidirectionally connected to the drain outlet through the guide port 11q, that is, only the filter inner cavity 11c is allowed to be unobstructed as the drainage path of the purified water chamber, while preventing any water flow from flowing back into the purified water chamber (filter inner cavity 11c) through the guide port 11q. Alternatively, if the filter inner cavity 11c is connected to the inlet 11a, the first one-way valve 15 only allows the annular outer cavity 11d to be unidirectionally connected to the drain outlet through the guide port 11q, that is, only the annular outer cavity 11d is allowed to be unobstructed as the drainage path of the purified water chamber, while preventing any water flow from flowing back into the purified water chamber (annular outer cavity 11d) through the guide port 11q.

[0066] By setting a first one-way valve 15 at the guide port 11q of the water cup 1, the presence of the first one-way valve 15 ensures the one-way flow of water during the drainage process of the filter device 100. Specifically, depending on the different designs of whether the inlet 11a is connected to the annular outer cavity 11d or the filter inner cavity 11c, the first one-way valve 15 only allows water to flow unidirectionally from the relatively clean side (whether it is the annular outer cavity 11d or the filter inner cavity 11c) through the guide port 11q to the drain port, preventing dirty water or residual sewage from flowing back from the drain port into the clean water chamber through the first one-way valve 15.

[0067] First, the first one-way valve 15 is set up so that when the annular outer cavity 11d or the filter inner cavity 11c is used as a water purification chamber, the water inside it is discharged from the dishwasher during the drainage stage. This reduces the problem of incomplete drainage in the filter device 100 and easy accumulation of residual water, and avoids the possible growth of bacteria and odors caused by water accumulation, thereby significantly improving the hygiene of the dishwasher.

[0068] Secondly, due to the restriction of the first one-way valve 15, water can only flow in a designated direction, which also prevents the backflow of contaminants. During drainage or circulation, even if there are pressure fluctuations, water will not flow back from the filter inner cavity 11c containing more impurities or the annular outer cavity 11d into the relatively clean one.

[0069] During the water circulation phase, it is necessary to ensure that the filtered clean water can be recycled. To this end, the first one-way valve 15 is closed. When the filter inner cavity 11c is connected to the water inlet 11a, the annular outer cavity 11d is the clean water chamber. Because the first one-way valve 15 is closed, water in the annular outer cavity 11d cannot flow to the drain through the guide port 11q. When the annular outer cavity 11d is connected to the water inlet 11a, the filter inner cavity 11c is the clean water chamber. Because the first one-way valve 15 is closed, water in the filter inner cavity 11c cannot flow to the drain through the guide port 11q. This design ensures that during the water circulation phase, water in the filter inner cavity 11c or the annular outer cavity 11d, which serves as the clean water chamber, will not be lost. This allows for effective connection to the circulation pump 300, enabling the recycling of filtered water and improving the dishwasher's cleaning effect and water resource utilization.

[0070] like Figure 6 , Figure 7 , Figure 8 and Figure 9As shown, in some embodiments, the guide port 11q is set lower than the filter inner cavity 11c and the annular outer cavity 11d. Since the first one-way valve 15 of the guide port 11q is mainly used for the drainage stage of the dishwasher, setting the guide port 11q to a position lower than the filter inner cavity 11c and the annular outer cavity 11d allows the washing water in the filter inner cavity 11c and / or the annular outer cavity 11d to flow out towards the guide port 11q due to gravity during the drainage stage, and finally be discharged from the filter device 100.

[0071] If the position of the guide port 11q is too high, the residual washing water in the filter inner cavity 11c and the annular outer cavity 11d that is lower than the guide port 11q cannot flow to the guide port 11q by gravity, resulting in washing water remaining in the filter device 100 during the drainage stage, which then leads to bacterial growth.

[0072] like Figure 9 and Figure 10 As shown, in some embodiments, the first one-way valve 15 includes a first valve cover 151, which is rotatably disposed at the guide port 11q. Specifically, the first valve cover 151 can be flipped toward the side where the drain pump is located. When the circulation pump 300 is operating, the first valve cover 151 blocks the guide port 11q under the action of water flow. Since the circulation pump 300 generates a suction force to draw filtered water from the filter inner cavity 11c or annular outer cavity 11d (which serves as the clean water chamber) to the circulating water outlet, the suction force acts on the rotatable first valve cover 151, causing it to cover the guide port 11q. This isolates the filter inner cavity 11c or annular outer cavity 11d (which serves as the clean water chamber) from the drain outlet, ensuring the cleanliness of the circulating water.

[0073] When the drain pump is working, it will draw water from the annular outer cavity 11d or the filter inner cavity 11c connected to the drain outlet. The suction force acts on the other side of the first valve cover 151, causing the first valve cover 151 to open the guide port 11q under the action of water flow. According to the connection configuration between the filter inner cavity 11c or the annular outer cavity 11d and the water inlet 11a, the filter inner cavity 11c or the annular outer cavity 11d, which serves as the water purification chamber, can be connected to the drain outlet. That is, the water in the water purification chamber can be discharged unidirectionally from the dishwasher through the guide port 11q during the drainage stage.

[0074] The first check valve 15, which is reversible, has a lower manufacturing cost compared to complex electric valves. It can achieve the connection or disconnection of the filter inner cavity 11c or annular outer cavity 11d, which serves as the water purification chamber, with the drain outlet at different stages, depending on the connection configuration between the filter inner cavity 11c or annular outer cavity 11d and the water inlet 11a.

[0075] like Figure 9and Figure 10 As shown, in some embodiments, the first one-way valve 15 further includes a first valve seat 152, which may be in the shape of a flat cylinder, while the first valve cover 151 is in the shape of a disc and can be placed on one side of the first valve seat 152. The first valve seat 152 is detachably connected to the through port 11q, so that the first one-way valve 15, as a relatively independent module, can be easily disassembled or installed from the through port 11q, which is beneficial for subsequent maintenance, cleaning or replacement. The first valve seat 152 has a flow port 152a communicating with the guide port 11q. The first valve cover 151 is rotatably disposed on the first valve seat 152 so as to open and close the guide port 11q by opening and closing the flow port 152a. The rotation of the first valve cover 151 directly corresponds to the opening or closing of the flow port 152a, so as to realize the function of the first one-way valve 15 selectively blocking or allowing the filter inner cavity 11c to flow with the drain port, or the annular outer cavity 11d to flow with the drain port, depending on the communication configuration between the filter inner cavity 11c or the annular outer cavity 11d and the water inlet 11a.

[0076] In some embodiments, the projection of the overflow port 152a along its own axis is located within the guide port 11q. That is, the first check valve 15 can be connected in an axially aligned manner relative to the guide port 11q, which can optimize the path of the liquid through the guide port 11q and the first check valve 15. When the liquid reaches the region of the guide port 11q, its mainstream direction is consistent with the axis of the guide port 11q, while the axial projection of the overflow port 152a is located within the guide port 11q. To prevent the liquid from flowing out of the overflow port 152a, a complex direction change is required.

[0077] This reduces flow resistance and energy loss, minimizing resistance caused by changes in water flow direction and thus lowering energy consumption, making water transmission more efficient. Furthermore, the first valve cover 151 can be opened more easily by the water flow; the impact of the water flow through the outlet 152a keeps the first valve cover 151 in an open, tilted position towards the drain pump.

[0078] like Figure 4 , Figure 9 and Figure 10As shown, in some embodiments, the first valve cover 151 includes a cover connector 1511 and a cover body 1512. The cover connector 1511 is connected to the first valve seat 152 and located on one side of the flow port 152a, while the cover body 1512 is rotatably connected to the cover connector 1511 to open and close the flow port 152a. The cover connector 1511 can fix the cover body 1512 on the first valve seat 152, providing a mounting base and rotation axis 31 for the cover body 1512. When it is necessary to close the flow port 152a, the cover body 1512 rotates to cover the flow port 152a, acting as a barrier to prevent fluid from passing through. When it is necessary to open the flow port 152a, the cover body 1512 rotates away from the flow port 152a, allowing fluid to pass through. Its shape and size are designed to match the shape and size of the flow port 152a. For example, the cover connector 1511 can be a structure similar to a fixed shaft, which is fixedly connected to the first valve seat 152. The fixed shaft is arranged parallel to the diameter of the first valve seat 152, and the cover body 1512 is provided with a rotating hole that can be fitted onto the fixed shaft to allow the cover body 1512 to rotate around the fixed shaft.

[0079] Specifically, one of the cover connector 1511 and the first valve seat 152 is provided with a snap-fit ​​protrusion 1513, and the other of the cover connector 1511 and the first valve seat 152 is provided with a snap-fit ​​through hole. The snap-fit ​​protrusion 1513 passes through the snap-fit ​​through hole to snap the cover connector 1511 and the first valve seat 152 together. Snap-fit ​​is a common quick connection method that does not require the use of additional bolts, screws or other fasteners, saving the screws themselves and the drilling and tapping processes that may be required, thus reducing material and manufacturing costs.

[0080] like Figure 9 and Figure 10 As shown, in some embodiments, a first valve seat 152 is disposed at the through port 11q, and a sealing groove 152c is provided on the outer peripheral sidewall of the first valve seat 152. The sealing groove 152c is an annular groove, arranged around the circumference of the first valve seat 152. The filter device 100 also includes a sealing element, which can be a rubber or silicone element. It is elastic and can deform after being installed in place. The sealing element is embedded in the sealing groove 152c to seal the assembly gap between the first valve seat 152 and the through port 11q, preventing liquid from leaking from the gap.

[0081] It can also maintain stable pressure in the filter inner cavity 11c or annular outer cavity 11d, which serves as the water purification chamber, and can better respond to the action of the circulation pump 300 and the drainage pump, thereby improving the efficiency of the circulating water stage and the drainage stage.

[0082] Regardless of whether the inner cavity outlet 11j connected to the filter inner cavity 11c is for connection to the circulation pump 300 or the drain pump, in the direction of water flow pointing towards the inner cavity outlet 11j, the water flow direction generally extends in the radial direction of the filter 21. Some structures on the filter 21 will be closer to the inner cavity outlet 11j. If the inner cavity outlet 11j is connected to the circulation pump 300, the suction of the circulation pump 300 will create a significant low-pressure area near the inner cavity outlet 11j, generating a strong suction force that acts directly on the outer surface of the filter 21. This suction force may adsorb some of the tiny particles, fine fibers, or flocculent matter filtered out by the filter and adhere tightly to the outer surface of the filter near the outlet, forming a local blockage. If the inner cavity outlet 11j is connected to the drain pump, suspended particles, food residues, or grease that may be slightly denser or larger in the inner cavity may not be effectively sucked away due to uneven suction distribution, resulting in residues in the filter inner cavity 11c.

[0083] like Figure 6 , Figure 7 and Figure 8 As shown, to solve the above problems, the bottom wall of the filter cavity 11c has an outlet channel 11k that connects the filter cavity 11c with the outlet 11j. The outlet channel 11k is a channel connecting the filter cavity 11c and the outlet 11j. Along the water flow direction pointing to the outlet 11j, the flow cross-section of the outlet channel 11k is reduced. That is, the cross-sectional area of ​​the inlet of the outlet channel 11k (near the bottom of the filter cavity 11c) is usually larger than the cross-sectional area of ​​its outlet (near the outlet 11j). Its tapered shape helps to guide and diffuse the strong low-pressure effect formed at the outlet 11j to the entire cross-section of the outlet channel 11k, and further transmit it to the surrounding area, i.e., the edge area of ​​the bottom of the filter cavity 11c, through the side wall of the outlet channel 11k. This can be understood as the formation of a relatively uniform low-pressure ring at the bottom edge of the filter inner cavity 11c (which can be called the "pressure equalization ring" effect), rather than a sharp low-pressure peak only forming at the position directly opposite the inner cavity outlet 11j. This relatively uniform low-pressure ring acts on the outer surface of the filter 21 edge, meaning that the pressure difference (suction) between the inside and outside of the bottom edge of the filter 21 is no longer highly concentrated in that specific arc segment near the inner cavity outlet 11j, but is now more evenly distributed around the circumference of the filter 21. In other words, the strong suction that was previously concentrated at one point (near the inner cavity outlet 11j) is now dispersed into a larger annular area.

[0084] In one configuration, washing water enters the annular outer cavity 11d through the inlet 11a, flows through the filter 21, and residue in the washing water is isolated on the outside of the filter 21. Relatively clean water flows into the inner cavity 11c of the filter, and a circulation pump 300 can be configured to connect with the inner cavity outlet 11j. In another configuration, washing water can also enter the inner cavity 11c of the filter through the inlet 11a, flow through the filter 21, and residue in the washing water is isolated on the inside of the filter 21. Relatively clean water flows into the annular outer cavity 11d, while residual water containing residue can be connected to the inner cavity outlet 11j via a drain pump.

[0085] like Figure 6 , Figure 7 and Figure 8 As shown, when the circulating pump 300 or the drain pump draws water through the inner cavity outlet 11j, a strong local low pressure (strong suction) would normally form in the area near the inner cavity outlet 11j. However, the tapered outlet channel 11k structure plays a crucial guiding and dispersing role. It guides and diffuses the strong low pressure effect formed at the inner cavity outlet 11j through the entire cross-section of the outlet channel 11k. Due to the large inlet of the outlet channel 11k, as the water flows into and towards the gradually narrowing outlet, the pressure energy is guided to the sidewall of the outlet channel 11k and further transferred to the edge area at the bottom of the filter inner cavity 11c.

[0086] A relatively uniform low-pressure ring is formed at the bottom edge of the filter inner cavity 11c, which can be called the "pressure equalization ring" effect. This low-pressure ring replaces the sharp low-pressure peak that was originally concentrated only at the position directly opposite the inner cavity outlet 11j. Because this low-pressure ring acts on the outer surface of the bottom edge of the filter 21, the pressure difference (i.e., suction) between the inside and outside of the bottom edge of the filter 21 is no longer highly concentrated in a specific arc segment near the inner cavity outlet 11j, but is instead more evenly distributed around the circumference of the filter 21.

[0087] When the inner cavity outlet 11j is used to connect the circulation pump 300, fine food residue is no longer pulled and compacted by a unilateral force into a specific area of ​​the cylindrical filter screen 212 near the inner cavity outlet 11j. The adhesion of fine residue becomes more dispersed, the adhesion rate tends to be uniform in the circumferential direction, and the overall adhesion strength is relatively reduced, making it less likely to accumulate in a large amount in a specific area to form a covering. Therefore, the risk of local clogging of the filter 21 is significantly reduced, which helps to keep the filter 21 unobstructed, maintain a stable circulating water flow, and improve the washing effect.

[0088] In other words, fine food residue is no longer pulled and compacted by a strong force into a specific area of ​​the cylindrical filter screen 212 near the inner cavity outlet 11j. The adhesion of fine residue becomes more dispersed, the adhesion rate tends to be uniform in the circumferential direction, and the overall adhesion strength is relatively reduced, making it less likely to accumulate in a large amount in a specific area to form a covering. Therefore, the risk of local clogging of the filter 21 is significantly reduced. This helps to keep the filter 21 unobstructed, maintain a stable circulating water flow, and may extend the maintenance cycle of the filter device 100.

[0089] When the outlet 11j of the inner cavity is used to connect to the drain pump, the water in the filter inner cavity 11c can be subjected to a relatively uniform suction force. This helps to more thoroughly and evenly discharge the sewage (including any small residues that may remain) from the filter inner cavity 11c, reducing dead zones and residues. This reduces the situation where drainage is incomplete or inadequate in certain areas due to weak suction on one side, leaving residues in the corresponding areas within the filter inner cavity 11c. It maintains the overall cleanliness and balance of the filter inner cavity 11c, and the uniform suction force also improves the overall efficiency and stability of drainage.

[0090] In the configuration where the push-suction water component 3 is installed in the filter cavity 11c, the filter 21 also includes a top sealing cover 211. The top sealing cover 211 is connected to the top of the support frame 214, which closes the top opening of the filter 21 to prevent unfiltered washing water from flowing directly into the filter cavity 11c through the opening at the top of the filter 21, bypassing the flat filter 23 and the cylindrical filter screen 212.

[0091] During operation, the filter device 100 continuously draws washing water into the water collection chamber 11b of the water cup 1 through the inlet 11a. Initially, the water gradually accumulates and rises within the collection chamber 11b. As the water level rises, the air volume within the collection chamber 11b is compressed, causing the internal air pressure to gradually increase. If this compressed air has no way to escape, it may create pressure within the collection chamber 11b.

[0092] Therefore, to ensure that washing water can smoothly enter the filter cavity 11c and to prevent the water intake process from being obstructed due to increased internal air pressure, the top sealing cover 211 is provided with a vent 211a. This allows air inside the cavity to be discharged in a timely manner during the water level rise, maintaining the balance between the internal air pressure and the external atmospheric pressure, thereby ensuring smooth water intake. Furthermore, to more effectively control the venting process and prevent washing water from accidentally overflowing from the vent 211a, a vent valve 213 can be installed inside the vent 211a.

[0093] like Figure 6 , Figure 7 and Figure 8As shown, in some embodiments, the outlet tank 11k has two first tank walls 11o. Along the water flow direction pointing towards the inner cavity outlet 11j, the distance between the two first tank walls 11o decreases, which describes the tapered structure of the outlet tank 11k with a decreasing flow cross-section. As the two first tank walls 11o gradually approach each other, the water flow is gathered to the center, reducing the lateral diffusion and turbulence of the water flow. The two first tank walls 11o converge from the inner cavity 11c of the filter towards the inner cavity outlet 11j, flattening the low-pressure peak near the outlet to the circumferential area, making the internal and external pressure difference acting on the bottom edge of the filter 21 (near the inner cavity outlet 11j area) more uniform.

[0094] Furthermore, the ends of the two first channel walls 11o are respectively connected to the opposite side walls of the inner cavity outlet 11j, forming a continuous structure without dead angles. That is, there are no gaps, steps, or abrupt changes in angle between them. Such discontinuous or uneven connections would cause additional eddies, turbulence, and pressure losses when the water flows from the outlet channel 11k to the inner cavity outlet 11j. Directly connecting the ends of the two first channel walls 11o to the side walls of the inner cavity outlet 11j makes the structure of the outlet channel 11k more stable and less prone to deformation. It also helps to ensure the sealing of the area of ​​the inner cavity outlet 11j, preventing water leakage from the gaps between the first channel walls 11o and the walls of the inner cavity outlet 11j.

[0095] In this embodiment, the first tank wall 11o is directly connected to the outlet wall of the inner cavity 11j, which allows the water flow to transition more smoothly and continuously from the outlet tank 11k to the inner cavity outlet 11j, reducing energy loss and flow interference, and helping to maintain the stability of water flow acceleration and low pressure effect.

[0096] like Figure 6 , Figure 7 and Figure 8 As shown, in some embodiments, the outlet tank 11k has a second tank wall 11p. The two ends of the second tank wall 11p are respectively connected to the two ends of the two first tank walls 11o away from the inner cavity outlet 11j. Understandably, the introduction of the second tank wall 11p, together with the two first tank walls 11o, constitutes the inlet boundary of the outlet tank 11k. The second tank wall 11p is arranged opposite to the inner cavity outlet 11j. That is to say, after the water flows into the outlet tank 11k, the second tank wall 11p can guide the water flow to the inner cavity outlet 11j, reducing energy loss.

[0097] Furthermore, the second channel wall 11p is an arc-shaped channel wall, recessed in the direction away from the inner cavity outlet 11j. When water flows through the second channel wall 11p, the water flow is guided by the recessed wall surface and converges between the two first channel walls 11o along the extension direction of the recessed wall surface. Moreover, the recessed arc-shaped second channel wall 11p can improve the strength and rigidity of this position when subjected to water flow impact or external pressure.

[0098] If the second tank wall 11p were a straight-line turn, it would cause turbulence when the water flows from the filter inner cavity 11c into the outlet tank 11k. However, in this embodiment, the tank wall is curved, which helps to reduce the impact and sudden turning of the water when it enters the outlet tank 11k from the inner cavity, reduces turbulence and energy loss caused by sharp angles or abrupt boundary changes, reduces flow resistance, and improves hydraulic efficiency. The water flow can transition more smoothly and evenly into the channel between the two first tank walls 11o.

[0099] In some embodiments, the first trench wall 11o satisfies one of the following conditions: Both first tank walls 11o are curved or inclined planes. Curved surfaces can better guide the water flow, accelerating it smoothly and reducing the formation of eddies. Inclined planes provide a simple and effective acceleration method, and their simple structure and ease of manufacture enable stable water flow acceleration and guidance towards the outlet. Both curved and inclined planes, compared to sudden changes in cross-section or sharp edges, can more smoothly alter the direction and speed of the water flow, reducing energy loss and flow disturbance. Furthermore, both are more resistant to the stress generated by long-term water flow impact than planes with sharp edges, reducing stress concentration and thus improving the durability of the outlet tank 11k structure. The two first tank walls 11o are axially symmetrical about the central axis of the inner cavity outlet 11j. This means that when the water flowing out of the outlet tank 11k reaches the inner cavity outlet 11j, its momentum and pressure distribution are symmetrical with respect to the central axis of the outlet. This enhances the "suction homogenization" effect previously achieved through the tapered cross section, ensuring that the internal and external pressure differences around the filter 21 are more similar. In the manufacturing process, the axially symmetrical structure also offers greater manufacturing convenience and makes it easier to ensure the consistency of batch products. The first tank wall 11o and the outlet wall 11j of the inner cavity have a smooth transition. Any abrupt change in geometry, especially sharp edges, can cause water flow separation and eddy currents. Flow separation and eddy currents consume the energy of the water flow, and a smooth transition minimizes these energy losses. Furthermore, a smooth transition is less likely to cause stress concentration, improving the structural strength and durability of the connection.

[0100] like Figure 6 , Figure 7 and Figure 8As shown, in some embodiments, along the axial direction of the filter 21, the projection of the filter inner cavity 11c onto the bottom wall 11e of the water collection cavity 11b covers at least a portion of the water outlet 11k, so that the water flow collected from the filter inner cavity 11c can flow directly and smoothly through the water outlet 11k to the inner cavity outlet 11j, reducing ineffective water loss or bypass flow, avoiding the need for the water flow to travel a long distance to exit the inner cavity outlet 11j, reducing the resistance of the flow path, improving the water flow collection efficiency, and making the structure of the entire filter device 100 more compact.

[0101] In some embodiments, the outer diameter of the filter 21 is D2, and the distance between the two ends of the two first tank walls 11o away from the inner cavity outlet 11j is D3, where D2 ≥ D3 ≥ 0.5D2. That is, the opening range of the two first sidewalls of the outlet tank 11k is smaller than the outer diameter of the filter 21. If the opening range of the outlet tank 11k exceeds the outer periphery of the filter 21, the water flow will disperse too early before entering the outlet tank 11k, which is not conducive to the guidance and acceleration of the water flow in the subsequent tapering section. Maintaining D3 ≤ D2 helps to concentrate the water flow in the filter 21 and guide it into the outlet tank 11k in an orderly manner.

[0102] The condition D3 ≥ 0.5D2 sets a lower limit for the distance D3 between the two first tank walls 11o and the outlet. This distance cannot be less than half the outer diameter D2 of the filter 21. Given that other dimensions of the outlet tank 11k are fixed, the lower limit of D3 directly determines the lower limit of the flow area at the inlet of the outlet tank 11k. If D3 is less than 0.5D2, the width of the outlet tank 11k will become very narrow at locations far from the outlet. When water flows from the bottom of the filter cavity 11c into the outlet tank 11k, if it encounters an excessively small inlet area, it will generate significant inlet resistance. Excessive inlet resistance and flow velocity may prevent circulating water from smoothly and efficiently entering the outlet tank 11k, thereby reducing the overall filtration system's output or circulation efficiency.

[0103] like Figure 6 , Figure 7 and Figure 8 As shown, in some embodiments, the inner diameter of the water collection chamber 11b is D1, where D2 ≥ 0.5D1. This means the outer diameter of the filter 21 is greater than or equal to half the inner diameter of the water collection chamber 11b, i.e., the filter 21 occupies a considerable portion of the space within the water collection chamber 11b. This allows the water flowing into the water collection chamber 11b to more easily and directly wash against the outer surface of the filter 21. This improves water flow utilization, allowing more water to contact the cylindrical filter screen 212 for filtration, and also promotes uniform water flow distribution, reducing dead water zones and resulting in more efficient filtration.

[0104] like Figure 4 and Figure 6As shown, in some embodiments, along the axial direction of filter 21, the height of filter 21 is H2, and the depth of outlet tank 11k is H3, where 0.5H2 ≥ H3 ≥ 0.1H2. If H3 is less than 0.1H2, outlet tank 11k will be very shallow, its flow cross-sectional area will be too small, leading to drastic local pressure changes, potentially generating significant noise, and making it difficult to effectively and uniformly guide water flow. Furthermore, if H3 is greater than 0.5H2, an excessively deep water tank will occupy too much space within the limited axial space of filter device 100, affecting the layout of other components or making the overall height of filter device 100 too large. An excessively deep water tank may also cause water to remain in the water tank for too long, affecting the scouring effect on the outer surface of filter 21. Therefore, by ensuring 0.5H2 ≥ H3 ≥ 0.1H2, outlet tank 11k can provide sufficient flow area and depth to achieve the required water flow acceleration and pressure distribution effects while maintaining a compact structure.

[0105] In some embodiments, one of the outer cavity outlet 11i or the inner cavity outlet 11j serves as a drain outlet and is used to connect with the dishwasher's drain pump to solve the drainage problem. When the dishwasher needs to drain, the drain pump can guide water with residue to the dishwasher's drainage system, preventing water from accumulating or overflowing in the water cup 1. The drain pump can quickly empty the sewage, reduce residual moisture inside the dishwasher, and thus reduce the possibility of odor and bacterial growth.

[0106] In terms of height, the height of the inner bottom wall of the circulating water outlet, the height of the bottom wall of the outlet tank 11k, and the height of the inner bottom wall of the drain outlet decrease sequentially. Understandably, by utilizing the principle of gravity, the water in the filter device 100 can flow along a predetermined path. The water in the outlet tank 11k, the filter inner cavity 11c, and the annular outer cavity 11d can all flow naturally to the drain outlet during the drainage stage. Through the height gradient design, the additional power required for the water flow from the water collection cavity 11b to the drain outlet during the drainage stage is reduced, thereby improving drainage efficiency and reducing the drainage burden on the drainage pump.

[0107] It should be noted that the normal operating cycle of a dishwasher includes a water circulation phase and a drainage phase. When the drainage phase begins, it means that the water circulation phase has ended, and it is no longer necessary to circulate the treated water back into the dishwasher. At this time, the washing water accumulated in the water cup 1 and its related structures (including the filter inner cavity 11c, the annular outer cavity 11d, the water outlet 11k, etc.) needs to be drained from the dishwasher, regardless of its original source or temporary storage location.

[0108] like Figure 6As shown, in some embodiments, the circulating water outlet and the drain outlet are respectively located on opposite sides of the water cup 1, which helps to form a clearer and more independent flow area inside the water cup 1. Circulating water flows from the corresponding filter inner cavity 11c or annular outer cavity 11d to the circulating water outlet, while during the drainage stage, all water in the entire filter device 100 flows to the drain outlet, making their spatial paths inside the water cup 1 easier to distinguish. This also provides a more reasonable and direct installation space and path for the circulating water connection pipe 13 connecting the circulating pump 300 and the drain pipe 12 connecting the drain pump (or directly connecting the drain pipe 12), avoiding the circulating water outlet and drain outlet being located on the same side, causing the connected pipes to squeeze each other or bend excessively due to mutual avoidance, and facilitating separate assembly and maintenance.

[0109] In some embodiments, at any two locations on the bottom wall of the outlet trough 11k, the height of the location relatively closer to the drain outlet is lower than or equal to the height of the other location. That is, along the direction from the outlet trough 11k towards the inner cavity outlet 11j, the height of the bottom wall near the circulating water outlet is higher than or equal to the height away from the circulating water outlet. This can be a sloping surface or a flat surface. The sloping surface guides the water flow along the bottom wall of the outlet trough 11k towards the drain outlet, preventing water accumulation within the outlet trough 11k during drainage. It also guides the flow direction, reduces resistance within the outlet trough 11k, accelerates drainage, and reduces the residence time of water within the outlet trough 11k, thereby reducing the accumulation of scale and dirt. This helps maintain the cleanliness of the outlet trough 11k. A flat surface is easier to manufacture, and the horizontal bottom surface of the outlet trough 11k ensures basic drainage functionality.

[0110] In some embodiments, the water cup 1 includes a water cup body 11, a drain pipe 12, and a circulating water connection pipe 13. The water cup body 11 serves as the basic structure of the water cup 1, and the aforementioned circulating water outlet and drain port are both located on the water cup body 11. The drain pipe 12 connects to and communicates with the drain port, extends away from the water cup body 11, and is used to connect to a drain pump, forming a defined drainage path. The extension direction and connection design of the drain pipe 12 help to fix the relative position between the water cup body 11 and the drain pump, ensuring the stability and sealing of the connection. The drain pipe 12 can guide the flow direction of the discharged washing water, preventing the water flow from being dispersed or obstructed during the drainage process, thereby improving drainage efficiency.

[0111] The circulating water connector 13 connects to the circulating water outlet and extends away from the water cup body 11, serving as a connection to the circulation pump 300 to form a circulating water path. The design of the circulating water connector 13 ensures that the water filtered and treated by the filter device 100 is effectively guided to the circulation pump 300, which then pressurizes the water and sends it back to the dishwasher's spray unit 500 for secondary use (e.g., rinsing dishes). The extension direction and connection design of the circulating water connector 13 help to fix the relative position between the water cup body 11 and the circulation pump 300, ensuring the stability and sealing of the connection.

[0112] like Figure 11 As shown, furthermore, along the direction away from the outlet tank 11k, the height of the inner bottom wall of the circulating water pipe 13 gradually increases. The upward sloping design ensures that even when the circulating pump 300 starts pumping, a relatively stable and high water level (or water pressure) is maintained at the inlet of the circulating water pipe 13, reducing the possibility of low-pressure areas or cavitation at the inlet. This ensures more stable inlet pressure than a flat pipe or a downward sloping pipe.

[0113] like Figure 11 As shown, in some embodiments, the annular outer cavity 11d is connected to the water inlet 11a, and the drain pipe 12 forms an interconnected drain chamber 12a and a slag collection chamber 12b. The water outlet trough 11k is positioned closer to the water collection chamber 11b than the drain chamber 12a, meaning that the circulating water in the filter inner cavity 11c flows through an area a certain distance from the slag collection chamber 12b where impurities accumulate before entering the circulating water connector 13. The slag collection chamber 12b is specifically designed to collect food residue or other impurities generated during the washing process, separating solid impurities from liquids, preventing residue from clogging the drain pipe 12, and ensuring the long-term unobstructed flow of the drainage system.

[0114] The main body of the slag collection chamber 12b is closer to the outlet trough 11k than the main body of the drainage chamber 12a. This means that when water flows out of the outlet 11i of the outer chamber, it first enters the slag collection chamber 12b. Along the direction away from the outlet trough 11k, the height of the bottom wall of the slag collection chamber 12b gradually decreases. Due to this gradual decrease in height, the cross-sectional area of ​​the drainage pipe 12 section containing the slag collection chamber 12b is larger, and the water flow velocity slows down due to the change (increase) in the cross-sectional area of ​​the chamber. The bottom wall of the slag collection chamber 12b slopes downwards, forming a low-lying area. Larger food scraps, debris, and other solid impurities, due to their density being greater than water, will settle to the bottom under gravity and be collected in the slag collection chamber 12b.

[0115] The bottom wall of the drainage chamber 12a is connected to the bottom wall of the slag collection chamber 12b. The height of the bottom wall of the drainage chamber 12a gradually increases, which makes it difficult for the water to flow out of the drainage pipe 12, as the water needs to overcome the trend of the gradually increasing bottom wall. This increases the difficulty for the water to carry the settled residue, causing solid impurities such as food residue and debris to remain in the slag collection chamber 12b.

[0116] Understandably, although it is tilted upwards, the water can still be smoothly pumped away by the suction force of the drain pump. This design is mainly to allow larger residues to settle in the slag collection chamber 12b, avoiding clogging of the drain pipe 12, rather than hindering drainage.

[0117] Furthermore, the upward tilting design can form a temporary "water seal" at the connection between the drain pipe 12 and the water cup body 11, preventing odors from flowing back from downstream to upstream (i.e., in the direction of the annular outer cavity 11d).

[0118] The above is an explanation of the dishwasher filter device 100 proposed in the embodiments of this application. Since the dishwasher proposed in the embodiments of this application adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be repeated here.

[0119] 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," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this 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.

[0120] 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 cup has a water collecting cavity and a water inlet and a water outlet, both of which are connected to the water collecting cavity. The water cup also has a guide port for connecting to the water outlet. A filter is disposed within the water collection chamber, and the water collection chamber is divided into an inner filter cavity and an annular outer cavity surrounding the outer periphery of the inner filter cavity; A first one-way valve is provided at the through port; Wherein, the annular outer cavity is connected to the water inlet, and the first one-way valve only allows the filter inner cavity to achieve one-way communication with the drain outlet through the guide port; or, the filter inner cavity is connected to the water inlet, and the first one-way valve only allows the annular outer cavity to achieve one-way communication with the drain outlet through the guide port.

2. The filter device of the dishwasher as described in claim 1, characterized in that, The opening is lower than the inner cavity of the filter and the outer annular cavity.

3. The filter device of the dishwasher as described in claim 1, characterized in that, The first check valve includes: The first valve cover is rotatably disposed at the through port; When the dishwasher's circulation pump is operating, the first valve cover blocks the passage under the action of water flow; when the dishwasher's drain pump is operating, the first valve cover opens the passage under the action of water flow.

4. The filter device of the dishwasher as described in claim 3, characterized in that, The first check valve includes: A first valve seat is detachably connected to the through port and has a flow port communicating with the through port. A first valve cover is rotatably disposed on the first valve seat so as to open or close the through port by opening or closing the flow port.

5. The filter device of the dishwasher as described in claim 4, characterized in that, The projection of the flow port along its own axis is located within the conduction port.

6. The filter device of the dishwasher as described in claim 4, characterized in that, The first valve cover includes: A cover connector, connected to the first valve seat and located on one side of the flow port; and The cover body is rotatably connected to the cover connector to open and close the flow port.

7. The filter device of the dishwasher as described in claim 6, characterized in that, The cover connector and one of the first valve seats are provided with a snap-fit ​​protrusion, and the other of the cover connector and the first valve seat are provided with a snap-fit ​​through hole. The snap-fit ​​protrusion passes through the snap-fit ​​through hole to snap the cover connector and the first valve seat together.

8. The filter device of the dishwasher as described in claim 7, characterized in that, The first valve seat is disposed at the through port, and a sealing groove is provided on the outer peripheral sidewall of the first valve seat. The filter device further includes: A sealing element, embedded in the sealing groove, is used to seal the assembly gap between the first valve seat and the wall of the through port.

9. The filter device of the dishwasher as claimed in claim 1, characterized in that, The water cup also has an inner cavity outlet that communicates with the inner cavity of the filter. The inner cavity outlet is used to communicate with the drain pump or the circulation pump of the dishwasher. The bottom wall of the inner cavity of the filter has a water outlet groove that communicates the inner cavity of the filter with the guide port. Along the water flow direction pointing to the inner cavity outlet, the flow cross section of the water outlet groove is reduced.

10. The filter device of the dishwasher as claimed in claim 9, characterized in that, The water outlet has two first walls. Along the water flow direction pointing to the water outlet of the inner cavity, the distance between the two first walls decreases. The ends of the two first walls are respectively connected to the two side walls opposite to the water outlet of the inner cavity.

11. The filter device of the dishwasher as claimed in claim 10, characterized in that, The first tank wall satisfies one of the following conditions: Both of the first groove walls are curved surfaces or inclined planes; The two first tank walls are arranged symmetrically about the central axis of the water outlet of the inner cavity; The first tank wall transitions smoothly with the outlet wall of the inner cavity.

12. The filter device of the dishwasher as claimed in claim 10, characterized in that, The outer diameter of the filter is D2, and the distance between the two ends of the first tank wall away from the outlet of the inner cavity is D3, wherein D2≥D3≥0.5D2.

13. The filter device of the dishwasher as claimed in claim 12, characterized in that, The inner diameter of the water collection cavity is D1, where D2 ≥ 0.5D1.

14. The filter device of the dishwasher as claimed in claim 10, characterized in that, The water outlet trough has a second trough wall, the two ends of which are respectively connected to the two ends of the first trough wall away from the water outlet of the inner cavity, and are arranged opposite to the water outlet of the inner cavity.

15. The filter device of the dishwasher as described in claim 14, characterized in that, The second groove wall is an arc-shaped groove wall, and is recessed in the direction away from the water outlet of the inner cavity.

16. The filtration device of a dishwasher as described in any one of claims 1-15, characterized in that, The water cup also has an outer cavity outlet that communicates with the annular outer cavity, the inlet that communicates with the annular outer cavity and the outer cavity outlet that is used to communicate with the drain pump of the dishwasher, or the inlet that communicates with the inner cavity of the filter and the outer cavity outlet that is used to communicate with the circulation pump of the dishwasher. as well as A push-suction water element is rotatably disposed in one of the inner cavity of the filter and the outer annular cavity, which is not connected to the water inlet, relative to the water cup. The push-suction water element includes a push surface and a suction surface disposed opposite to each other along the direction of rotation of the push-suction water element. During the rotation of the push surface, there is a radial component of the pushing force on the water, and during the rotation of the suction surface, there is a radial component of the suction force on the water.

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

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