Filter device for a dishwasher and dishwasher
By designing a filtration device in the dishwasher that includes a water collection tank, a filter, and a push-suction water element, the radial force of the push-suction water blades is used to separate residue and washing water, thus solving the problem of filter clogging and improving washing performance and equipment lifespan.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FOSHAN SHUNDE MIDEA WASHING APPLIANCES MANUFACTURING CO LTD
- Filing Date
- 2025-08-15
- Publication Date
- 2026-07-28
AI Technical Summary
Existing dishwasher filters are easily clogged by food residue, which prevents the circulation pump from efficiently delivering washing water and affects the washing effect.
Design a filtration device including a water collection shell, a filter, and a push-suction water element. The device separates residue and washing water through the radial thrust and suction of the push-suction water blades, avoiding clogging and increasing the circulating water flow rate.
It effectively prevents filter clogging, improves washing performance, extends dishwasher lifespan, and ensures circulating water flow and washing effect.
Smart Images
Figure CN224557422U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of dishwasher technology, and in particular to a filter device and a dishwasher. Background Technology
[0002] In related technologies, the filter device is an important component of the dishwasher, mainly used to filter food residue and other impurities during the washing process. The filtered wash water is circulated and cleaned on the dishes by a circulation pump, while the filtered residue is discharged by a drain pump.
[0003] However, during the washing process, food residue can easily clog the filter screen of the filter device, hindering the flow of washing water. This results in the circulation pump being unable to efficiently deliver enough washing water to participate in the circulation washing, affecting the washing effect of the dishwasher. Utility Model Content
[0004] This application provides a filter device for a dishwasher and a dishwasher, which can reduce the risk of filter clogging and improve the washing effect of the dishwasher.
[0005] To achieve the above objectives, a first aspect of this application provides a filtration device for a dishwasher, comprising:
[0006] A water collection shell has a water collection cavity, and the top of the water collection cavity has a water inlet;
[0007] A filter is disposed within the water collection chamber, dividing the water collection chamber into an inner filter cavity and an annular outer cavity surrounding the outer periphery of the inner filter cavity. One of the inner filter cavity and the annular outer cavity communicates with the water inlet.
[0008] A push-suction water element is rotatably disposed in the inner cavity of the filter and the other of the annular outer cavity relative to the water collection shell. The push-suction water element includes a rotating shaft and push-suction water blades connected to the rotating shaft to rotate with the rotating shaft. The push-suction water blades include 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, the pushing force on the water has a radial component, and during the rotation of the suction surface, the suction force on the water has a radial component. The radial distance between the free end of the push-suction water blade adjacent to the filter and the filter is greater than 0 mm and not greater than 10 mm.
[0009] In some embodiments, the radial distance between the free end of the push-suction blade adjacent to the filter and the filter is not less than 3 mm and not more than 7 mm.
[0010] In some embodiments, the free end of the push-suction blade adjacent to the filter is the portion where the push surface and the suction surface intersect.
[0011] In some embodiments, along the direction of rotation of the push-suction element, the push surface is located in front of the suction surface, and the radial distance between the push surface and the filter is increased.
[0012] In some embodiments, the radial distance between the water-pushing surface and the filter is no greater than 1 / 4 of the filter radius.
[0013] In some embodiments, at least two push-suction blades are provided, and when viewed along the axial direction of the rotating shaft, at least two push-suction blades are arranged in a centrally symmetrical manner about the rotating shaft.
[0014] In some embodiments, the water-pushing surface is an inclined plane or a curved surface, and the water-absorbing surface is an inclined plane or a curved surface.
[0015] In some embodiments, the free end of the push-suction blade adjacent to the filter also has a water-blocking surface that is disposed opposite to the filter and adapted in shape, the water-blocking surface being connected between the push-suction surface and the suction surface.
[0016] In some embodiments, the free end of the push-suction blade adjacent to the filter is the portion where the water-blocking surface intersects with the push-water surface.
[0017] In some embodiments, the filter is arranged in a cylindrical shape;
[0018] The water-pushing component is rotatably disposed in the inner cavity of the filter, and the water-blocking surface is provided with an outwardly convex arc surface;
[0019] Alternatively, the water-pushing component can be rotatably disposed in the annular outer cavity, and the water-blocking surface is configured as an inwardly concave arc surface.
[0020] In some embodiments, the annular outer cavity is in communication with the water inlet, and the filter includes a top sealing cap and a cylindrical filter screen disposed below the top sealing cap;
[0021] The push-suction water element is rotatably disposed in the inner cavity of the filter, and the top surface of the push-suction water element is not lower than the top surface of the cylindrical filter screen.
[0022] In some embodiments, the filtering device further includes a driving component, the driving component comprising:
[0023] A drive shaft passes through the water collection shell and is connected to the rotating shaft for transmission.
[0024] In some embodiments, the filtration device further includes:
[0025] A planar filter, covering the top of the water collection chamber, the planar filter having an installation port; and
[0026] A cup is installed at the mounting port. The cup has a cup filter hole and a filter groove with an open top. The cup filter hole connects one of the filter inner cavity and the annular outer cavity to the filter groove.
[0027] In some embodiments, the pore size of the cup, the pore size of the planar filter, and the pore size of the filter decrease sequentially.
[0028] A second aspect of this application provides a dishwasher, comprising:
[0029] The filtration device as described in the above embodiments;
[0030] The inner tank has a washing chamber that communicates with the water collection chamber;
[0031] A drain pump, connected to the filter inner cavity and the annular outer cavity via a connection to the inlet; and
[0032] A circulating pump is connected to the inner cavity of the filter and another one in the annular outer cavity.
[0033] In the filtration device provided in this application embodiment, the filter is disposed within a water collection chamber, which is divided into an inner filter chamber and an annular outer chamber surrounding the inner filter chamber. One of the inner filter chamber and the annular outer chamber is connected to the water inlet. The inner filter chamber serves as one of the wastewater chamber and the clean water chamber, while the annular outer chamber serves as the other. During operation, when washing water enters the inner filter chamber or the annular outer chamber connected to the water inlet, the filter filters the water flow, trapping food residue in the wastewater chamber, while the filtered water enters the clean water chamber for circulating washing. This design effectively separates residue and washing water, providing a clean water source for subsequent circulating washing, while concentrating residue in the wastewater chamber for easy discharge via a drain pump.
[0034] The push-suction component is rotatably disposed in the other of the filter's inner cavity and annular outer cavity relative to the water collection shell. The push-suction blades have a pushing surface and a suction surface arranged in opposite directions. When the pushing surface rotates, it exerts a radial component of the pushing force on the water, and when the suction surface rotates, it exerts a radial component of the suction force on the water. For example, the push-suction component is disposed in the filter's inner cavity, in which case the annular outer cavity is connected to the water inlet. Water and residue in the dishwasher enter the annular outer cavity through the water inlet. After being filtered, the residue remains in the annular outer cavity, while the filtered water enters the filter's inner cavity for subsequent circulating washing. When residue adheres to the filter, the push-suction component rotates. The radial pushing force of the pushing surface pushes the water in the filter's inner cavity towards the annular outer cavity, causing the attached residue to detach. The radial suction force of the suction surface draws water from the annular outer cavity into the filter's inner cavity, forming a circulation, enhancing the cleaning effect, preventing clogging, increasing the circulating water flow, and improving the washing effect.
[0035] Alternatively, the push-suction element can be located in the annular outer cavity, in which case the filter inner cavity is connected to the inlet. Water and residue enter the filter inner cavity from the inlet. After filtration, the residue remains in the filter inner cavity, while the filtered water enters the annular outer cavity for circulating washing. When residue adheres to the filter, the push-suction element rotates, and the radial thrust of the push surface pushes the water in the annular outer cavity into the filter inner cavity, causing the residue to detach. The radial suction of the suction surface draws water from the filter inner cavity into the annular outer cavity for circulating cleaning, which also avoids clogging and improves flow rate and washing effect.
[0036] Furthermore, the radial distance between the pusher blades and the filter is set within a range greater than 0 mm and not greater than 10 mm. This design avoids interference and wear caused by contact between the pusher blades and the filter, while ensuring that the pusher blades generate a strong pushing and suction effect on the water flow near the filter surface when rotating. The closer distance allows the water flow to more effectively push the residue away from the filter surface under the pusher surface. The radial force generated by the pusher and suction surfaces can act more directly on the residue on the filter surface, effectively pushing the residue away from the filter surface, preventing residue from adhering and clogging the filter screen, ensuring the long-term efficient operation of the filtration device, reducing the problem of excessive load on the circulation pump caused by clogging, and extending the service life of the dishwasher. Attached Figure Description
[0037] 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.
[0038] Figure 1 This is a partial structural diagram of a dishwasher in one embodiment of this application;
[0039] Figure 2 This is a schematic diagram of the structure of a filtering device in one embodiment of this application;
[0040] Figure 3 This is an exploded view of the structure of the filtering device in some embodiments of this application;
[0041] Figure 4 for Figure 2 A schematic diagram of the cross-sectional structure along the AA direction;
[0042] Figure 5 This is a schematic diagram of the assembly of the filter and the push-suction water component in one embodiment of this application;
[0043] Figure 6 This is a schematic diagram of the assembly of the filter and the push-suction water component in another embodiment of this application;
[0044] Figure 7 This is a schematic diagram of the structure of the push-suction element in one embodiment of this application;
[0045] Figure 8 This is a schematic diagram of the water-pushing component in another embodiment of this application.
[0046] Explanation of icon numbers:
[0047] 100. Filter device; 1. Water collection shell; 11a. Water inlet; 11b. Water collection chamber; 11c. Filter inner cavity; 11d. Annular outer cavity; 12. Drain pipe; 13. Circulating water connection pipe; 21. Filter; 211. Top sealing cover; 212. Cylindrical filter screen; 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; 333. Water blocking surface; 4. Drive assembly; 421. Drive shaft; 200a. Washing chamber; 300. Circulating pump.
[0048] 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
[0049] 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.
[0050] In the following description, when referring to the accompanying drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. 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.
[0051] Please refer to Figure 1 This application provides a dishwasher, including a shell, a base, a door, an inner tub, a spray nozzle, a filter device 100, a circulation pump 300, and a drain pump.
[0052] The outer shell is connected to the base and door, and covers the inner tub and spray components to protect the inner tub, spray components, filter device 100, circulation pump 300 and drain pump, thereby reducing the probability of damage to the inner tub, spray components, filter device 100, circulation pump 300 and drain pump, so that the inner tub, spray components, filter device 100, circulation pump 300 and drain pump can have a longer service life, so that the dishwasher as a whole can have a longer service life.
[0053] Understandably, the outer shell can be made of at least one of metal or plastic. When the outer shell is made of metal, it can be manufactured using a bending forming process to improve the overall structural strength of the shell, thereby reducing the probability of damage and better protecting the inner tank, spray components, filter device 100, circulation pump 300, and drain pump, ensuring a longer service life for the dishwasher. When the outer shell is made of plastic, it can be manufactured using a one-piece injection molding process, which also improves the overall structural strength of the shell and reduces the probability of damage.
[0054] The base is located at the bottom of the dishwasher to support other components and absorbs vibrations from the dishwasher through the feet, reducing the transmission of vibrations to the placement surface and thus lowering the probability of vibration noise.
[0055] The inner liner has a washing chamber 200a, which is used to place tableware.
[0056] The spray nozzle is located inside the inner liner and is used to spray cleaning solution onto the surface of the tableware, thereby removing food residue from the outer surface of the tableware and cleaning the outer surface. The cleaning solution may include water, detergent, or a mixture of water and detergent.
[0057] The filter device 100 is installed in the inner tank and located at the bottom of the inner tank along the direction of gravity. The filter device 100 is connected to the washing chamber 200a and is used to receive water carrying food residue and filter out food residue in the water so that the filtered water can enter the circulating water circuit to realize the recycling of water and thus achieve the purpose of saving water.
[0058] The circulating pump 300 is connected to the filter device 100 through the circulating water pipe 13, and the drain pump is connected to the filter device 100 through the drain pipe 12. The circulating pump 300 can pump the filtered water back into the spray unit; the drain pump can discharge the water and food residue in the filter device 100.
[0059] However, during dishwasher operation, food residue on the dishes enters the filter with the water flow. With prolonged use, the existing filter's fine-pore structure, designed to trap rice grains, crumbs, fibers, and other food residue, is prone to clogging due to the continuous accumulation of food residue. Once clogged, the water flow rate significantly decreases, resulting in insufficient water entering the dishwasher's circulation system. This affects the overall water circulation efficiency, preventing the dishwasher from effectively cleaning the dishes and severely reducing washing results, failing to meet users' demands for thorough cleaning.
[0060] Based on the above, please refer toFigures 1-6 The filtration device 100 includes a water collection shell 1, a filter 21, and a push-suction water element 3.
[0061] The water collection shell 1 has a water collection cavity 11b, and a water inlet 11a is provided at the top of the water collection cavity 11b. The water collection shell 1 can be made of materials such as plastic or stainless steel, and can be integrally formed by injection molding or stamping processes to ensure the sealing and stability of the structure. The water collection cavity 11b is used to accommodate the filter 21 and the push-suction water component 3. When the dishwasher is working, washing water and food residue enter the water collection cavity 11b from the water inlet 11a.
[0062] The filter 21 can be a cylindrical filter, a conical filter, a square filter, or a filter of other shapes. This embodiment will use a cylindrical filter as an example for explanation.
[0063] The filter 21 is disposed within the water collection chamber 11b, dividing the chamber into an inner filter chamber 11c and an annular outer chamber 11d surrounding the inner filter chamber 11c. One of the inner filter chamber 11c or the annular outer chamber 11d communicates with the water inlet 11a. The filter 21 may include a metal or plastic filter screen, the pore size of which can be designed to filter the required residue size. The filter 21 can be fixed within the water collection shell 1 by means of snap-fit, bolt connection, or other methods. The inner filter chamber 11c serves as one of the wastewater chamber and the clean water chamber, while the annular outer chamber 11d serves as the other. During operation, when washing water enters the inner filter chamber 11c or the annular outer chamber 11d communicating with the water inlet 11a, the filter 21 filters the water flow, trapping food residue in the wastewater chamber, while the filtered water enters the clean water chamber for circulating washing. This design effectively separates residue from washing water, providing a clean water source for subsequent circulating washing, while concentrating residue in the wastewater chamber for easy discharge via a drain pump.
[0064] The push-suction water component 3 is rotatably disposed in the other of the filter inner cavity 11c and annular outer cavity 11d relative to the water collection shell 1. The push-suction water component 3 includes a rotating shaft 31 and a push-suction water blade 32 connected to the rotating shaft 31 and rotating with it. The rotating shaft 31 can be made of plastic or metal; the push-suction water blade 32 can also be made of plastic or metal and is fixedly connected to the rotating shaft 31 by welding, injection molding or other methods.
[0065] The push-suction blade 32 has a push-water surface 331 and a suction surface 332 arranged in opposite directions along the direction of rotation. When the push-water surface 331 rotates, it exerts a radial component of the pushing force on the water. When the suction surface 332 rotates, it exerts a radial component of the suction force on the water. The radial distance D4 between the free end of the push-suction blade 32 adjacent to the filter 21 and the filter 21 is greater than 0 mm and not greater than 10 mm, that is, 0 mm < D4 ≤ 10 mm.
[0066] The push-suction water component 3 in this embodiment has two configurations, which are used to push food residue away from the filter 21 to clean the filter 21.
[0067] In the first setup method, such as Figure 4 and Figure 5 As shown, the push-suction element 3 is installed in the inner cavity 11c of the filter, while the annular outer cavity 11d is connected to the inlet 11a. Under the action of the circulation pump 300, water and residue in the inner tank enter the annular outer cavity 11d from the inlet 11a. After being filtered by the filter 21, the residue remains in the annular outer cavity 11d, and the filtered water enters the inner cavity 11c of the filter, and is then pumped to the spray element for circulating washing via the circulation water pipe. When residue is adsorbed onto the filter 21, the push-suction element 3 rotates, and the radial thrust of the push surface 331 pushes the water in the inner cavity 11c of the filter towards the annular outer cavity 11d, causing the attached residue to detach; the radial suction of the suction surface 332 draws the water in the annular outer cavity 11d into the inner cavity 11c of the filter, forming a circulation, enhancing the cleaning effect, preventing clogging, increasing the circulating water flow, and improving the washing effect. At this time, the circulation pump 300 is connected to the inner cavity 11c of the filter, and the drain pump is connected to the annular outer cavity 11d to discharge the residue from the annular outer cavity 11d.
[0068] In the second setting method, such as Figure 6 As shown, the push-suction element 3 is located in the annular outer cavity 11d, at which time the filter inner cavity 11c is connected to the inlet 11a. When the circulation pump 300 is working, water and residue enter the filter inner cavity 11c from the inlet 11a. After being filtered by the filter 21, the residue remains in the filter inner cavity 11c, and the filtered water enters the annular outer cavity 11d to participate in the circulating washing. When the residue is adsorbed on the filter 21, the push-suction element 3 rotates, and the radial thrust of the push surface 331 pushes the water in the annular outer cavity 11d into the filter inner cavity 11c, causing the residue to detach; the radial suction of the suction surface 332 draws the water in the filter inner cavity 11c into the annular outer cavity 11d for circulating cleaning, which can also avoid clogging and improve the flow rate and washing effect. At this time, the circulation pump 300 is connected to the annular outer cavity 11d, and the drain pump is connected to the filter inner cavity 11c to discharge the residue in the filter inner cavity 11c.
[0069] Furthermore, the radial distance D4 between the push-suction vane 32 and the filter 21 is set within the range of greater than 0 mm and not greater than 10 mm. This design avoids interference and wear caused by the contact between the push-suction vane 32 and the filter 21, while ensuring that the push-suction vane 32 generates a strong pushing and suction effect on the water flow near the surface of the filter 21 when rotating. The closer distance allows the water flow to more effectively push the residue away from the surface of the filter 21 under the push of the push surface 331, preventing the residue from adhering and clogging the filter screen, ensuring the long-term efficient operation of the filter device 100, reducing the problem of excessive load on the circulation pump 300 caused by clogging, and extending the service life of the dishwasher.
[0070] Furthermore, in some embodiments, the radial distance D4 between the free end of the push-suction vane 32 adjacent to the filter 21 and the filter 21 is not less than 3 mm and not more than 7 mm.
[0071] From a manufacturing perspective, if D4 is less than 3mm, the processing precision requirements for the push-suction vane 32 and the filter 21 are extremely high. Strict control of their dimensional and installation errors is necessary; otherwise, interference between the push-suction vane 32 and the filter 21 due to excessively small spacing can easily occur, significantly increasing production difficulty and manufacturing costs. Conversely, if D4 is greater than 7mm, the radial thrust and suction generated by the rotating push-suction vane 32 on the water flow surface of the filter 21 will be significantly weakened, leading to a decrease in cleaning effectiveness. This embodiment sets D4 between 3mm and 7mm, which reduces manufacturing precision requirements and production costs while ensuring that the push-suction vane 32 generates a sufficiently strong pushing and suction effect on the water flow surface of the filter 21, ensuring that residue can be effectively pushed away from the filter screen and maintaining good filtration and circulation effects.
[0072] In some embodiments, such as Figure 7 As shown, the free end of the push-suction blade 32 adjacent to the filter 21 is the part where the push surface 331 and the suction surface 332 intersect. The edge of the free end formed by the intersection of the push surface 331 and the suction surface 332 can be sharp or have a small rounded transition, so that the free end of the push-suction blade 32 can more efficiently act on the surrounding water flow during rotation. When the push-suction blade 32 rotates, the force of the push surface 331 pushing the water flow and the force of the suction surface 332 adsorbing the water flow will form a resultant force at the intersecting free end, enhancing the disturbance effect on the water flow near the surface of the filter 21. Since the free end is the intersection point of the push surface 331 and the suction surface 332, the water flow velocity changes more drastically here, generating a stronger impact force, which is more conducive to pushing away the residue attached to the filter 21.
[0073] In some embodiments, such as Figure 5 and Figure 6 As shown, along the direction of rotation of the push-suction component 3, the push surface 331 is located in front of the suction surface 332, and the radial distance between the push surface 331 and the filter 21 increases. Thus, during rotation, the push surface 331 and the filter 21 form a gradually expanding wedge-shaped space. When the push-suction blade 32 rotates, according to fluid dynamics principles, the water flow velocity in the narrower part of the wedge-shaped space is greater, thereby enhancing the scouring force on the surface of the filter 21. Along the direction of rotation of the push-suction component 3, the acute angle formed between the push surface 331 and the surface of the filter 21 allows the water flow to impact the filter 21 at a certain angle. Compared to vertical impact, this inclined scouring method is more effective in pushing residue away from the filter screen surface, improving the cleaning effect.
[0074] Furthermore, in some embodiments, the radial distance between the pusher surface 331 and the filter 21 is no greater than 1 / 4 of the radius of the filter 21. This ensures that the distance between the pusher surface 331 and the filter 21 is sufficiently close, allowing the thrust generated by the pusher surface 331 to act more effectively on the surface of the filter 21. When the radial distance exceeds 1 / 4 of the radius of the filter 21, the impact of the water flow disturbance generated by the pusher surface 331 on the filter 21 is significantly weakened, leading to a decrease in the residue removal effect. This embodiment, by controlling the radial distance within a small range, allows the high-speed water flow generated by the pusher surface 331 to act directly on the filter screen surface, forming a sufficient radial component force to push away the residue. This ensures that there is no interference between the pusher blades 32 and the filter 21, while also improving the cleaning effect of the water flow on the filter screen, thereby effectively preventing clogging and improving the reliability and service life of the filter device 100.
[0075] In some embodiments, at least two push-suction blades 32 are provided, and when viewed along the axial direction of the rotating shaft 31, at least two push-suction blades 32 are centrally symmetrically arranged about the rotating shaft 31. This embodiment achieves a centrally symmetrical layout by evenly arranging the push-suction blades 32 around the outer periphery of the rotating shaft 31. For example, when two push-suction blades 32 are provided, they are symmetrically distributed at 180° on both sides of the rotating shaft 31; when four push-suction blades 32 are provided, adjacent push-suction blades 32 form a 90° angle. During dishwasher operation, the push-suction component 3 rotates at high speed. The centrally symmetrical structure of the push-suction blades 32 allows the water flow reaction forces on each push-suction blade 32 to balance each other, preventing eccentric rotation of the rotating shaft 31 due to uneven force distribution. This not only reduces vibration and noise during the rotation of the push-suction component 3, ensuring the stability of the filter device 100, but also reduces wear on the rotating shaft 31 and extends the service life of the components. Meanwhile, the symmetrically distributed push-suction blades 32 can make the water flow around the filter 21 more uniform, and the residue in each area can be effectively removed, avoiding local filter screen blockage due to inadequate cleaning, and further improving the filtration effect.
[0076] In some embodiments, the pushing surface 331 is an inclined plane or a curved surface, and the suction surface 332 is an inclined plane or a curved surface. When the pushing surface 331 is an inclined plane, the inclined structure enhances the thrust on the water flow; when the pushing surface 331 is a curved surface, it can be an outwardly convex arc, using the curved surface to guide the water flow direction and reduce resistance. When the suction surface 332 is an inclined plane, the inclination direction can be opposite to that of the pushing surface 331; when the suction surface 332 is a curved surface, it can be designed as an inwardly concave arc, using the converging effect of the curved surface to enhance suction. The shapes of the pushing surface 331 or the suction surface 332 can be formed by injection molding or machining to ensure a smooth surface and reduce water flow resistance. During operation, the inclined or curved water-pushing surface 331 can more efficiently transfer radial thrust to the water flow, allowing the water flow to more forcefully impact the surface of the filter 21 and push away the residue; while the inclined or curved water-absorbing surface 332 can more smoothly guide the water flow back, enhancing the water flow's ability to pass through the filter 21, thereby improving the cleaning efficiency of the filter screen and preventing clogging.
[0077] In some embodiments, such as Figure 5 and Figure 8 As shown, the free end of the push-suction blade 32 adjacent to the filter 21 also has a water-blocking surface 333 that is opposite to the filter 21 and has a shape adapted to it. The water-blocking surface 333 connects the push-suction surface 331 and the suction surface 332. The water-blocking surface 333 can be a curved surface structure with a curvature similar to that of the filter 21, and is integrally formed with the push-suction blade 32 by injection molding or molding process. When the push-suction component 3 rotates, the push-suction surface 331 pushes water out from one side cavity, and some of the water flow will naturally tend to flow back to the original cavity. At this time, the water-blocking surface 333 will form a blocking structure in front of the suction surface 332, preventing the backflow water from directly impacting the suction surface 332, so that the water flow bypasses the water-blocking surface 333, thereby forming a local low-pressure area behind the suction surface 332. According to the principle of fluid mechanics, the water-blocking surface 333 makes the pressure in the area of the suction surface 332 significantly lower than the surrounding environment, forming a stronger suction negative pressure. For example, the water-pushing and suction component 3 is disposed in the inner cavity 11c of the filter. After the water-pushing surface 331 pushes the water out to the annular outer cavity 11d, the water-blocking surface 333 can block part of the backflow water from flowing back to the inner cavity 11c of the filter, thereby improving the water absorption efficiency of the water-absorbing surface 332 and greatly enhancing the scouring effect on the surface of the filter 21.
[0078] Furthermore, the free end of the push-suction blade 32 adjacent to the filter 21 is the part where the water-blocking surface 333 and the water-pushing surface 331 intersect. In this embodiment, the point of action of the push-suction blade 32 is concentrated at the intersection of the water-blocking surface 333 and the water-pushing surface 331, forming an edge structure similar to a blade. When the push-suction component 3 rotates, the aforementioned intersection area will contact and cut the water flow layer on the surface of the filter 21. Utilizing the thrust of the water-pushing surface 331 and the guiding effect of the water-blocking surface 333, a high-speed water flow area is formed near the intersection, thereby enhancing the scouring ability of the water flow on the surface of the filter 21 and further improving the cleaning effect.
[0079] In some embodiments, the filter 21 is cylindrical; the push-suction element 3 is rotatably disposed in the inner cavity 11c of the filter, and the water-blocking surface 333 is convex; or, the push-suction element 3 is rotatably disposed in the annular outer cavity 11d, and the water-blocking surface 333 is concave.
[0080] When the push-suction component 3 is located in the inner cavity 11c of the filter, the convex arc surface of the water-blocking surface 333 is adapted to the inner wall of the cylindrical filter 21. The water-blocking surface 333 can better prevent the water pushed from the inner cavity 11c of the filter to the annular outer cavity 11d from flowing back, thus enhancing the suction negative pressure and further increasing the flushing pressure on the inner wall of the filter 21. Similarly, when the push-suction component 3 is located in the annular outer cavity 11d, the concave arc surface of the water-blocking surface 333 is adapted to the outer wall of the filter 21. The water-blocking surface 333 can better prevent the water pushed from the annular outer cavity 11d into the inner cavity 11c of the filter from flowing back, thus enhancing the suction negative pressure and further increasing the flushing pressure on the inner wall of the filter 21.
[0081] In some embodiments, such as Figure 3 and Figure 4 As shown, the annular outer cavity 11d is connected to the water inlet 11a. The filter 21 includes a top sealing cover 211 and a cylindrical filter screen 212 disposed below the top sealing cover 211. The push-suction element 3 is rotatably disposed in the filter inner cavity 11c, and the top surface of the push-suction element 3 is not lower than the top surface of the cylindrical filter screen 212.
[0082] The top sealing cap 211 can be made of rubber, silicone, plastic, or other materials. It can be fixed to the top of the cylindrical filter screen 212 by means of snap-fit, bolt connection, or adhesive bonding, thereby sealing the top of the filter inner cavity 11c. This prevents unfiltered washing water from directly entering the filter inner cavity 11c from the top of the filter 21, ensuring that all washing water entering the annular outer cavity 11d must be filtered by the cylindrical filter screen 212 before entering the filter inner cavity 11c, thus improving filtration performance. The cylindrical filter screen 212 can be made of metal or plastic, with mesh holes distributed on its surface to intercept food residues of different sizes.
[0083] The top surface of the push-suction component 3 is not lower than the cylindrical filter screen 212, meaning that the rotation range of the push-suction blade 32 covers the entire height area of the cylindrical filter screen 212. When the dishwasher is working, as the push-suction component 3 rotates, the push surface 331 pushes the water in the filter inner cavity 11c towards the cylindrical filter screen 212, and the suction surface 332 draws water from the annular outer cavity 11d of the cylindrical filter screen 212. The resulting water flow can thoroughly rinse all parts of the cylindrical filter screen 212, avoiding cleaning dead corners at the top of the cylindrical filter screen 212 due to insufficient height of the push-suction component 3. This ensures that the entire cylindrical filter screen 212 can be cleaned, preventing residue from accumulating and clogging the filter screen, thereby ensuring smooth flow of washing water.
[0084] Please see Figures 2 to 4 In some embodiments, in order to improve the filtration efficiency of the filter device 100, the filter device 100 further includes a primary filter 22, which includes a planar filter 23 and a cup 24. The planar filter 23 is covered on the top of the water collection chamber 11b and has an installation port 23a. The cup 24 is installed in the installation port 23a and has a cup filter hole 24b and a filter groove 24a with an open top. The cup filter hole 24b connects one of the filter inner cavity 11c and the annular outer cavity 11d with the filter groove 24a.
[0085] The planar filter 23 can be made of plastic or metal, manufactured through injection molding or stamping processes. Its surface is distributed with filter holes. For example, the planar filter 23 includes a planar filter screen, which is inclined at an angle between 5° and 45°. This allows gravity to guide the washing water towards the cup 24, while also facilitating the sliding of larger residues on the surface of the planar filter 23, ultimately allowing them to fall into the filter groove 24a of the cup 24. The planar filter 23 is connected to the top of the water collection chamber 11b via a snap-fit or bolt. The cup 24 can also be installed in the mounting port 23a of the planar filter 23 via a snap-fit or threaded connection. The depth and volume of the filter groove 24a are designed according to a preset amount of residue, and the aperture of the cup filter holes 24b is larger than that of the filter 21.
[0086] During operation, the planar filter 23 and the cup 24 perform preliminary filtration of the washing water. In one embodiment, the cup filter hole 24b connects the filter inner cavity 11c and the filter tank 24a. The washing water first passes through the planar filter 23, where larger food residues are intercepted and slide down the inclined plane to the cup 24 and fall into the filter tank 24a. Smaller residues are carried by the water flow through the planar filter 23, enter the filter tank 24a through the cup filter hole 24b, and then flow into the filter inner cavity 11c. Even smaller residues are intercepted in the filter inner cavity 11c when passing through the filter 21.
[0087] In another embodiment, the cup filter hole 24b connects the annular outer cavity 11d and the filter tank 24a. The washing water passes through the planar filter 23, the cup filter hole 24b, and the filter tank 24a in sequence before entering the annular outer cavity 11d. Larger residues remain in the filter tank 24a, while smaller residues are intercepted by the filter 21 in the annular outer cavity 11d.
[0088] The multi-stage filtration method described in the two embodiments above collects residues of different sizes in the filter tank 24a, the filter inner cavity 11c, or the annular outer cavity 11d, respectively. This avoids all residues clogging a certain filter component, improves the overall filtration efficiency and anti-clogging ability of the filter device 100, and also makes it convenient for users to periodically remove the cup 24 to clean larger residues, reducing the cleaning frequency of the filter 21.
[0089] In some embodiments, the pore sizes of the cup 24, the flat filter 23, and the filter 21 decrease sequentially. This sequentially decreasing pore size design forms a three-stage filtration structure, enabling the interception of residues of different sizes during the filtration process. Larger food residues, such as bones and vegetable stalks, are intercepted by the pores of the cup 24 and placed in the filter tank 24a; medium-sized residues, such as rice grains and small bone fragments, are intercepted by the flat filter 23; and fine residues, such as flour particles and small debris, are ultimately intercepted by the filter 21. This significantly reduces the burden on individual filter components and avoids pore clogging caused by diverse residue sizes. Simultaneously, the staged filtration makes residue collection more organized, with residues of different sizes concentrated in different components, facilitating subsequent cleaning and discharge. This further enhances the practicality and reliability of the filtration device 100, ensuring smooth circulation of washing water and the washing effect of the dishwasher.
[0090] In some embodiments, such as Figure 3 and Figure 4 As shown, the filter device 100 also includes a drive assembly 4, which includes a drive shaft 421. The drive shaft 421 passes through the water collection shell 1 and is connected to the rotating shaft 31. The drive shaft 421 can be connected to the water collection shell 1 through bearings to ensure its stability during rotation. The transmission connection between the drive shaft 421 and the rotating shaft 31 can be achieved by gear meshing, coupling connection, or other methods to ensure efficient and reliable power transmission. During operation, the drive shaft 421 is powered by the dishwasher's motor, driving the rotating shaft 31 and the push-suction vane 32 to rotate synchronously. Simultaneously, the design of the drive shaft 421 facilitates control of the rotation speed and direction of the push-suction vane 3, allowing adjustment of the working state of the push-suction vane 3 according to the amount and type of residue during washing, thus saving energy while ensuring cleaning effectiveness.
[0091] 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.
[0092] 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.
[0093] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0094] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A filter device for a dishwasher, characterized in that, include: A water collection shell has a water collection cavity, and the top of the water collection cavity has a water inlet; A filter is disposed within the water collection chamber, dividing the water collection chamber into an inner filter cavity and an annular outer cavity surrounding the outer periphery of the inner filter cavity. One of the inner filter cavity and the annular outer cavity communicates with the water inlet. A push-suction water element is rotatably disposed in the inner cavity of the filter and the other of the annular outer cavity relative to the water collection shell. The push-suction water element includes a rotating shaft and push-suction water blades connected to the rotating shaft to rotate with the rotating shaft. The push-suction water blades include 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, the pushing force on the water has a radial component, and during the rotation of the suction surface, the suction force on the water has a radial component. The radial distance between the free end of the push-suction water blade adjacent to the filter and the filter is greater than 0 mm and not greater than 10 mm.
2. The filtration device as described in claim 1, characterized in that, The radial distance between the free end of the push-suction blade adjacent to the filter and the filter is not less than 3 mm and not more than 7 mm.
3. The filtration device as described in claim 1, characterized in that, The free end of the push-suction blade adjacent to the filter is the part where the push surface and the suction surface intersect.
4. The filtration device as described in claim 1, characterized in that, Along the direction of rotation of the push-suction component, the push surface is located in front of the suction surface, and the radial distance between the push surface and the filter is increased.
5. The filtration device as described in claim 4, characterized in that, The radial distance between the water-pushing surface and the filter is no greater than 1 / 4 of the filter radius.
6. The filtration device as claimed in claim 1, characterized in that, At least two push-suction blades are provided, and when viewed along the axial direction of the rotating shaft, at least two push-suction blades are arranged in a centrally symmetrical manner about the rotating shaft.
7. The filtration device as claimed in claim 1, characterized in that, The water-pushing surface is an inclined plane or a curved surface, and the water-absorbing surface is an inclined plane or a curved surface.
8. The filtration device as claimed in claim 1, characterized in that, The free end of the push-suction blade adjacent to the filter also has a water-blocking surface that is opposite to the filter and adapted in shape, and the water-blocking surface is connected between the push-suction surface and the suction surface.
9. The filtration device as claimed in claim 8, characterized in that, The free end of the push-suction blade adjacent to the filter is the portion where the water-blocking surface intersects with the push-water surface.
10. The filtration device as claimed in claim 8, characterized in that, The filter is cylindrical in shape; The water-pushing component is rotatably disposed in the inner cavity of the filter, and the water-blocking surface is provided with an outwardly convex arc surface; Alternatively, the water-pushing component can be rotatably disposed in the annular outer cavity, and the water-blocking surface is configured as an inwardly concave arc surface.
11. The filtration device as claimed in claim 1, characterized in that, The annular outer cavity is connected to the water inlet, and the filter includes a top sealing cover and a cylindrical filter screen disposed below the top sealing cover; The push-suction water element is rotatably disposed in the inner cavity of the filter, and the top surface of the push-suction water element is not lower than the top surface of the cylindrical filter screen.
12. The filtration device as claimed in claim 1, characterized in that, The filtration device further includes a drive assembly, which comprises: A drive shaft passes through the water collection shell and is connected to the rotating shaft for transmission.
13. The filtration device according to any one of claims 1-12, characterized in that, The filtration device further includes: A planar filter, covering the top of the water collection chamber, the planar filter having an installation port; and A cup is installed at the mounting port. The cup has a cup filter hole and a filter groove with an open top. The cup filter hole connects one of the filter inner cavity and the annular outer cavity to the filter groove.
14. The filtration device as claimed in claim 13, characterized in that, The filter aperture of the cup, the filter aperture of the planar filter, and the filter aperture decrease sequentially.
15. A dishwasher, characterized in that, include: The filtration device as described in any one of claims 1-14; The inner tank has a washing chamber that communicates with the water collection chamber; A drain pump, connected to the filter inner cavity and the annular outer cavity via a connection to the inlet; and A circulating pump is connected to the inner cavity of the filter and another one in the annular outer cavity.