A filtration device and a dishwasher

Abstract

This application discloses a filtration device and a dishwasher. The filtration device includes a water collection shell, a filter assembly, and a push-suction component. The water collection shell has a water collection cavity with an inlet at the top. The filter assembly includes a primary filter and a secondary filter arranged sequentially along the water flow direction. The secondary filter is disposed within the water collection cavity, dividing the cavity into an inner filter cavity and an annular outer cavity surrounding the inner filter cavity and communicating with the inlet. The secondary filter includes a top sealing cap and a cylindrical filter screen disposed below the top sealing cap. The push-suction component includes a push surface and a suction surface arranged opposite to each other along the direction of rotation. During rotation, the push surface exerts a radial component of its pushing force on the water to push the water out of the annular outer cavity. During rotation, the suction surface exerts a radial component of its suction force on the water to draw the water into the inner filter cavity. The technical solution of this application can improve the filtration efficiency of the filtration device.

Description

Technical Field

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

[0002] In related technologies, a top filter screen is usually installed at the top of the cylindrical filter screen. This results in uneven axial air pressure distribution in the filter cavity, causing the flow rate of the upper part of the filter screen to decrease due to air pressure leakage, while the flow rate of the lower part of the filter screen to be too high due to pressure concentration. This leads to uneven utilization of the filter area of ​​the cylindrical filter screen (some areas are overloaded and some areas are idle), resulting in a decrease in the filtration efficiency of the filter device. Utility Model Content

[0003] This application provides a filtration device and a dishwasher, which aim to improve the problem of low filtration efficiency of the filtration device.

[0004] To address the aforementioned technical problems, embodiments of this application provide a filtering device, comprising: A water collection shell has a water collection cavity, and the top of the water collection cavity has a water inlet; A filter assembly includes a primary filter and a secondary filter arranged sequentially along the water flow direction. The secondary filter is disposed within a water collection chamber, dividing the water collection chamber into an inner filter cavity and an annular outer cavity surrounding the outer periphery of the inner filter cavity and communicating with the water inlet. The secondary filter includes a top sealing cap and a cylindrical filter screen disposed below the top sealing cap. A push-suction water element is rotatably disposed in the inner cavity of the filter relative to the water collection shell. The push-suction water element includes a push surface and a suction surface disposed opposite to each other along the direction of rotation of the push-suction water element. During the rotation of the push surface, the pushing force on the water has a radial component to push the water out of the annular outer cavity. During the rotation of the suction surface, the suction force on the water has a radial component to draw the water into the inner cavity of the filter.

[0005] In some embodiments, the primary filter includes: A lifting cup is positioned at the water inlet and communicates with the annular outer cavity. The filter pore diameter of the lifting cup is larger than that of the cylindrical filter screen.

[0006] In some embodiments, the bottom of the cup includes: The overlapping area, covered by the top sealing cap, has a bottom filter hole or is in a closed configuration; and The enclosed area is not covered by the top sealing cap and is in a closed configuration.

[0007] In some embodiments, the cup is arranged around the outer periphery of the cylindrical filter screen, the entire bottom of the cup is not covered by the top sealing cap, and the bottom of the cup is completely closed; or The bottom of the cup is completely covered by the top sealing cap, and the bottom of the cup is provided with a bottom filter hole.

[0008] In some embodiments, the primary filter further includes: A planar filter is disposed at the water inlet and above the top sealing cap, and has an installation port in the middle, to which the cup can be detachably installed.

[0009] In some embodiments, the upper surface of the planar filter is inclined downwards toward the cup.

[0010] In some embodiments, the pore size of the planar filter is smaller than that of the cup, and the pore size of the planar filter is larger than that of the cylindrical filter.

[0011] In some embodiments, the cup ring is disposed on the outer periphery of the filter and located between the filter and the planar filter, such that the entire bottom of the cup is not covered by the top sealing cap.

[0012] In some embodiments, the axial distance between the top sealing cap and the bottom of the cylindrical filter screen is H1, and the axial distance between the planar filter and the bottom of the cylindrical filter screen is H2, wherein H1 < H2.

[0013] In some embodiments, the top sealing cap has a vent; the filter further includes: An exhaust valve is movably disposed at the exhaust port; When the water level is below the top sealing cover, the vent valve opens the vent hole to release the gas below the top sealing cover; when the water level is above the top sealing cover, the vent valve closes the vent hole.

[0014] In some embodiments, the lower surface of the top sealing cover is recessed with an air guide groove, the air guide groove is arranged around the vent hole, and the groove wall of the air guide groove is inclined from bottom to top towards the vent hole.

[0015] In some embodiments, the top sealing cap includes: A cover body, which is placed on top of the cylindrical filter screen; and An air guide is connected to the lower surface of the cover, and the horizontal cross-section of the air guide increases from bottom to top.

[0016] In some of these embodiments, the horizontal cross-section of the air guide gradually increases from bottom to top.

[0017] In some embodiments, the filtering device further includes: The drive assembly includes a drive shaft and a bearing. The drive shaft passes through the water collection shell and the cylindrical filter screen, and is connected to the top sealing cover through the bearing. The water-pushing component is sleeved on the drive shaft so as to rotate with the drive shaft.

[0018] This application also provides a dishwasher, including: The aforementioned filtration device; The inner tank has a washing chamber that communicates with the water collection chamber; A circulation pump, connected to the inner cavity of the filter; and A drainage pump is connected to the annular outer cavity.

[0019] In some embodiments, the axial distance between the top sealing cap and the bottom of the cylindrical filter screen is H1, and when the circulation pump is working, the axial distance between the liquid level in the washing chamber and the bottom of the cylindrical filter screen is H3, wherein H1 < H3.

[0020] In some embodiments, the dishwasher further includes: A spray element is disposed within the washing chamber and communicates with the circulating pump. The spray element includes at least one of an upper spray arm, a middle spray arm, and a lower spray arm.

[0021] In this embodiment, the filtration device seals the top of the cylindrical filter screen with a top sealing cap, thereby improving the pressure stability of the filter cavity. This allows the filter holes at various heights of the cylindrical filter screen to experience a uniform pressure difference, enabling water to flow through the entire filter surface of the cylindrical filter screen at a stable flow rate. This fully utilizes the filter area of ​​the cylindrical filter screen, improving the filtration efficiency of the filtration device. Water can pass through the primary filter and the secondary filter in sequence to form a two-stage filtration, thereby achieving step-by-step filtration of food residue, improving the filtration efficiency and accuracy of the filter. Furthermore, the lifting cup intercepts larger filter residue, thus preventing larger filter residue from clogging more filter holes of the cylindrical filter screen and reducing the filtration efficiency of the cylindrical filter screen. Attached Figure Description

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

[0023] Figure 1 This is a partial structural schematic diagram of a dishwasher provided in an embodiment of this application; Figure 2 This is an exploded view of the filter device in an embodiment of this application; Figure 3 This is a cross-sectional structural diagram of the filtering device in an embodiment of this application; Figure 4 This is a top view of the cup and filter assembled in one embodiment of this application; Figure 5 This is a top view of the cup and filter assembled in another embodiment of this application; Figure 6 This is a top view of the cup and filter assembled in another embodiment of this application; Figure 7 This is an exploded view of the filter device in another embodiment of this application; Figure 8 This is a schematic cross-sectional view of the cup and elastic element assembled in one embodiment of this application; Figure 9 This is a schematic cross-sectional view of the cup and buoyancy component assembled in one embodiment of this application; Figure 10 This is a schematic diagram of the elastic element in one embodiment of this application; Figure 11 This is a cross-sectional schematic diagram of the connection structure between the filter and the drive assembly in one embodiment of the filtering device of this application.

[0024] Explanation of reference numerals in the attached figures: 100. Filter device; 1. Water collection shell; 11a. Water inlet; 11b. Water collection chamber; 11c. Filter inner cavity; 11d. Annular outer cavity; 11r. Rotary groove; 2. Filter assembly; 21. Filter; 211. Top sealing cover; 211a. Vent hole; 211b. Air guide groove; 2111. Cover; 2112. Air guide part; 2114. Air guide surface; 2113. Guide slope; 212. Cylindrical filter screen; 213. Vent valve; 2131. Elastic element; 2132. Buoyancy element; 2133. Sealing part; 2134. Connecting part; 2135. Second venting channel; 2136. Limiting element 2137, First exhaust channel; 2141, Support ridge; 2146, Lower support ring; 21461, Turnbuckle; 21462, Annular groove; 2147, Sealing ring; 22, Primary filter; 23, Planar filter; 23a, Mounting port; 24, Lifting cup; 2411, Overlapping area; 2412, Enclosed area; 24c, Bottom filter hole; 24d, Side filter hole; 3, Push-suction component; 331, Push-water surface; 332, Suction surface; 4, Drive assembly; 40, Drive shaft; 46, Top bearing; 500, Spray component; 510, Upper spray arm; 520, Middle spray arm; 530, Lower spray arm. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0026] Please refer to Figure 1 This application provides a dishwasher, including a shell, a base, a door, an inner tub, a spray element 500, a filter device 100, a circulation pump, and a drain pump.

[0027] The outer shell is connected to the base and the door, and covers the inner tank and spray unit 500. It is used to protect the inner tank, spray unit 500, filter device 100, circulation pump and drain pump, so as to reduce the probability of damage to the inner tank, spray unit 500, filter device 100, circulation pump and drain pump, thereby enabling the inner tank, spray unit 500, filter device 100, circulation pump and drain pump to have a longer service life, so as to give the dishwasher a longer service life.

[0028] 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 tub, spray nozzles 500, filter device 100, circulation pump, 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.

[0029] 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.

[0030] The inner liner has a washing chamber for placing tableware.

[0031] The spray nozzle 500 is disposed inside the inner liner and is used to spray cleaning liquid onto the surface of the tableware, thereby removing food residue from the outer surface of the tableware and cleaning the outer surface of the tableware. The cleaning liquid may include water, detergent, or a mixture of water and detergent.

[0032] Please refer to Figure 1 In some embodiments, the spray element 500 is disposed within the washing chamber and communicates with the circulation pump. The spray element 500 includes at least one of an upper spray arm 510, a middle spray arm 520, and a lower spray arm 530. This arrangement allows food residue on the surface of the tableware to detach from the outer surface, thereby cleaning the outer surface of the tableware. Preferably, the spray element 500 includes an upper spray arm 510, a middle spray arm 520, and a lower spray arm 530, which allows for better cleaning of the tableware within the washing chamber and enhances the cleaning effect of the dishwasher.

[0033] 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 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.

[0034] Both the circulation pump and the drain pump are connected to the filter device 100. The circulation pump can pump the filtered water back into the spray unit 500; the drain pump can discharge the water in the filter device 100.

[0035] Please refer to Figures 1 to 3The filtration device 100 includes a water collection shell 1 and a filter assembly 2. The water collection shell 1 has a water collection cavity 11b, and the top of the water collection cavity 11b has a water inlet 11a. The filter assembly 2 includes a filter 21, which is disposed in the water collection cavity 11b and 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 and communicating with 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. Water first enters the annular outer cavity 11d and then enters the inner filter cavity 11c after being filtered by the filter 21. The filtered residue remains in the annular outer cavity 11d. Understandably, a circulation pump is connected to the inner filter cavity 11c to pump the filtered water in the inner filter cavity 11c into the spray element 500, and a drain pump is connected to the annular outer cavity 11d to discharge the residue in the annular outer cavity 11d and the water in the filtration device 100. The filter 21 can be cylindrical or conical; no specific limitation is made here. The following description uses a cylindrical filter 21 as an example.

[0036] Please refer to Figure 1 and Figure 2 It is understandable that, in order to improve the filtration efficiency of filter 21, filter assembly 2 also includes primary filter 22. The filtration aperture of primary filter 22 is larger than that of cylindrical filter screen 212, and the cleaning liquid can pass through primary filter 22 and filter 21 in sequence to form a two-stage filtration, thereby realizing the step-by-step filtration of food residue and improving the filtration efficiency and filtration accuracy of filter 21.

[0037] Specifically, the primary filter 22 includes a cup 24, the pore size of which is larger than that of the cylindrical filter screen 212. The cleaning solution can pass through the cup 24 and the filter 21 sequentially, thereby achieving step-by-step filtration of food residue and improving the filtration efficiency and precision of the filter 21. Furthermore, the cup 24 intercepts larger filter residue, preventing it from clogging the numerous pores of the cylindrical filter screen 212 and reducing its filtration efficiency.

[0038] Please refer to Figures 4 to 7In some embodiments, the bottom of the cup 24 includes an overlapping region 2411 and a closed region 2412. The overlapping region 2411 is covered by a top sealing cap 211 and has a bottom filter hole 24c or is closed. The closed region 2412 is not covered by the top sealing cap 211 and is closed. This configuration, with the bottom filter hole 24c in the overlapping region 2411, can improve the filtration efficiency of the cup 24. It is understood that the top sealing cap 211 blocking the cup 24 can prevent residue from entering the overlapping region 2411, and thus prevent residue from entering the cup 24 from the bottom filter hole 24c.

[0039] In some embodiments, the cup 24 has sidewall filter holes on its peripheral sidewall. This configuration improves the filtration efficiency of the cup 24, thereby increasing the filtration efficiency of the filter device 100 and improving the cleaning efficiency of the dishwasher.

[0040] In some embodiments, the primary filter 22 further includes a planar filter 23, which is disposed at the inlet 11a and above the top sealing cover 211. The planar filter 23 communicates with the annular outer cavity 11d, and the cup 24 is detachably installed on the planar filter 23. The filter pore diameters of the cup 24, the planar filter 23, and the filter 21 decrease sequentially, forming a series of decreasing sidewall filter pores. With this configuration, the cleaning fluid can pass sequentially through the planar filter 23, the cup 24, and the filter 21 to form a three-stage filtration, thereby achieving step-by-step filtration of food residue and improving the filtration efficiency and accuracy of the filter 21.

[0041] Please refer to Figure 3 In some embodiments, the axial distance between the top sealing cap 211 and the bottom of the water collection chamber 11b is H1, and the axial distance between the planar filter 23 and the bottom of the water collection chamber 11b is H2, where H1 < H2. This arrangement ensures that the top sealing cap 211 is located below the planar filter 23, thereby preventing the cleaning liquid from directly entering the filter inner cavity 11c through the cylindrical filter screen 212. Instead, the cleaning liquid first passes through the planar filter 23 and then through the cylindrical filter screen 212 into the filter inner cavity 11c, thus improving the filtration efficiency and accuracy of the filter 21.

[0042] In some embodiments, the axial distance between the top sealing cover 211 and the bottom of the water collection chamber 11b is H1, and the axial distance between the liquid level in the washing chamber and the bottom of the water collection chamber 11b is H3 when the circulation pump is working, wherein H1 < H3. This configuration ensures that the filter cavity 11c is filled with cleaning liquid when the circulation pump is working, thereby preventing a large amount of air in the water collection chamber 11b from affecting the operation of the circulation pump.

[0043] In some embodiments, the flat filter 23 is disposed at the water inlet 11a and above the top sealing cover 211, and has a mounting port 23a in the middle. The cup 24 is detachably installed in the mounting port 23a. With this configuration, the cup 24 is installed on the flat filter 23, which simplifies the installation of the cup 24, thereby simplifying the filter structure of the filter device 100, facilitating the disassembly, cleaning or replacement of the cup 24, and thus making it easier for the user to operate.

[0044] In some embodiments, the upper surface of the planar filter 23 is inclined downwards towards the cup 24. With this configuration, water on the planar filter screen is guided to the cup 24 for filtration, while larger debris such as bones and toothpicks are moved into the cup 24 by the water flow. This allows the user to clean only the cup 24 without disassembling the entire planar filter 23, thus simplifying operation.

[0045] Please refer to Figure 2 In some embodiments, the filter device 100 further includes a push-suction water element 3, which is rotatably disposed in the filter inner cavity 11c relative to the water collection shell 1. The push-suction water element 3 includes a push surface 331 and a suction surface 332 disposed opposite to each other along the direction of the push-suction water element 3. During the rotation of the push surface 331, there is a radial component of the pushing force on the water to push the water out to the annular outer cavity 11d. During the rotation of the suction surface 332, there is a radial component of the suction force on the water to draw the water into the filter inner cavity 11c.

[0046] When water containing food residue such as rice grains, crumbs, and fibers flows into the filter inner cavity 11c from the inlet 11a, as the push-suction component 3 rotates, the suction surface 332 of the push-suction component 3, during rotation, has a radial component of its suction force on the water, which can draw the water in the filter inner cavity 11c into the annular outer cavity 11d. Thus, the filter 21 can effectively intercept food residue in the water, filter out the food residue in the water, and provide a clean guarantee for the water that subsequently enters the dishwasher's circulating water circuit.

[0047] During the rotation of the water-pushing surface 331, there is a radial component of the thrust on the water. This allows it to push the water from the annular outer cavity 11d into the filter inner cavity 11c. In this process, the water flow will push away food residues attached to the inner surface of the filter 21, thereby reducing the probability of food residues blocking the water flow to the annular outer cavity 11d, so as to achieve the self-cleaning of the filter 21. This enables the filter 21 to have better filtration performance, ensuring sufficient water volume entering the dishwasher's circulating water circuit and providing a reliable guarantee for water circulation.

[0048] In some embodiments, the filtration device 100 further includes a drive assembly 4, which includes a drive shaft 40 and a top bearing 46. The drive shaft 40 passes through the water collection shell 1 and the cylindrical filter screen 212, and is connected to the top sealing cover 211 via the top bearing 46. The push-suction element 3 is sleeved on the drive shaft 40 to rotate with it. This configuration, with the drive shaft 40 connected to the top sealing cover 211 via the top bearing 46, ensures that the drive shaft 40 is limited by the top sealing cover 211 during rotation, preventing the drive shaft 40 from shaking and affecting the rotation of the push-suction element 3.

[0049] It should be noted that the negative pressure generated axially during the rotation of the push-suction water component 3 is affected by the top sealing cover 211 and cannot form a vortex by axial air intake. This can prevent the bubbles generated by the vortex from bursting on the surface of the push-suction water component 3 and causing cavitation damage to the push-suction water component 3, thus protecting the push-suction water component 3.

[0050] Specifically, the filtration device 100 further includes a drive assembly 4, which includes a drive shaft 40 and a top bearing 46. The drive shaft 40 passes through the water collection shell 1 and the cylindrical filter screen 212, and is connected to the top sealing cover 211 via the top bearing 46. The push-suction element 3 is sleeved on the drive shaft 40 to rotate with it. Thus, the connection between the drive shaft 40 and the top sealing cover 211 via the top bearing 46 improves the stability of the drive shaft 40 during rotation, thereby improving the rotational stability of the push-suction element 3. This allows the push-suction element 3 to better drive water flow, thereby improving the filtration efficiency of the filter 21.

[0051] In some embodiments, the projection of the top sealing cap 211 onto the cylindrical filter screen 212 in the axial direction of the filter 21. That is, when viewing the filter 21 from above, the cylindrical filter screen 212 is covered by the top sealing cap 211. Thus, when water flows from the inlet 11a into the collection chamber 11b, the water is first blocked by the top sealing cap 211 and flows into the annular outer cavity 11d, and then enters the filter inner cavity 11c after being filtered by the cylindrical filter screen 212. The top edge of the cylindrical filter screen 212 is usually a structurally weak area (such as welding points or interfaces). The top sealing cap 211 can physically protect the top of the cylindrical filter screen 212 from external impacts, mechanical damage during installation, or deformation caused by water flow impact, reducing the probability of the cylindrical filter screen 212 failing due to edge damage.

[0052] In some embodiments, the top sealing cover 211 is in the shape of a circular plate. Thus, when the top sealing cover 211 is subjected to axial water flow impact, the stress can be evenly distributed along the circumference, eliminating stress concentration caused by sharp edges, making it less prone to deformation and cracking, maintaining the flatness of the sealing surface for a long time, and ensuring sealing stability. Considering that the gas in the filter cavity 11c will accumulate under the top sealing cover 211 under the action of buoyancy to form an air cavity, the water cannot completely fill the filter cavity 11c. The cylindrical filter screen 212 can only filter in a local filter area below the air cavity, which affects the filtration efficiency of the cylindrical filter screen 212.

[0053] Therefore, please refer to Figure 8 The top sealing cover 211 has a vent hole 211a; the filter 21 also includes a vent valve 213, which is movably disposed at the vent hole 211a; wherein, when the water level is lower than the top sealing cover 211, the vent valve 213 opens the vent hole 211a to discharge the gas below the top sealing cover 211; when the water level is higher than the top sealing cover 211, the vent valve 213 closes the vent hole 211a.

[0054] In this way, the gas inside the filter cavity can be discharged through the exhaust valve 213, preventing the gas inside the filter cavity 11c from forming an air cavity that affects the filtration efficiency of the cylindrical filter screen 212, thereby improving the filtration efficiency of the filter 21.

[0055] Please refer to Figure 8 In some embodiments, the vent valve 213 includes an elastic element 2131, which is at least partially located on the upper surface of the top sealing cover 211; wherein, when the water level is below the top sealing cover 211, the elastic element 2131 can open the vent hole 211a under the push of gas; when the water level is above the top sealing cover 211 and the dishwasher's circulation pump is working, the elastic element 2131 closes the vent hole 211a under the action of water flow.

[0056] Thus, when the water level is lower than the top sealing cover 211, water will enter the filter cavity 11c through the cylindrical filter screen 212. As the water level rises, the gas in the filter cavity 11c will push the elastic element 2131 to open the vent 211a, and then be discharged from the vent 211a. When the water level is higher than the top sealing cover 211 and the dishwasher's circulation pump is working, the water in the filter cavity 11c will flow under the action of the circulation pump, and drive the elastic element 2131 to close the vent 211a, thereby preventing water from directly entering the filter cavity 11c through the drain hole, so that water can only enter the filter cavity 11c through the cylindrical filter screen 212.

[0057] Specifically, the circulation pump is sealed to the bottom of the cylindrical filter screen 212 and communicates with the filter inner cavity 11c, ensuring that the circulation pump only draws in water that has been filtered by the cylindrical filter screen 212. When the circulation pump is working, it will generate negative pressure in the filter inner cavity 11c, thereby driving the water in the filter inner cavity 11c to flow into the circulation pump and causing the elastic element 2131 to close the vent 211a.

[0058] The elastic element 2131 can be in the form of a thin film or a block. Preferably, the elastic element 2131 is in the form of a thin film, which allows it to better deform and seal the exhaust port 211a. It also facilitates the movement of gas within the filter cavity 11c, which pushes the elastic element 2131 to open the exhaust port 211a and allow gas to escape from it. Specifically, one end of the elastic element 2131 can be rotatably mounted on the upper surface of the top sealing cover 211, opening or closing the exhaust port 211a by rotation. Alternatively, one end of the elastic element 2131 can be bonded to the upper surface of the top sealing cover 211, allowing the other end to open or close the exhaust port 211a through elastic deformation. Further examples are not listed here.

[0059] It should be noted that when the water level is lower than the top sealing cover 211, the elastic element 2131 can block the water and prevent it from entering directly from the drain hole. The gas in the filter cavity 11c will be discharged from the filter hole of the cylindrical filter screen 212. The other part of the gas in the filter cavity 11c pushes the elastic element 2131 to open the vent hole 211a. At this time, the opening of the elastic element 2131 is very small and only allows the gas to be discharged, which can prevent water from entering the filter cavity 11c directly through the vent hole 211a.

[0060] Please refer to Figure 9 In other embodiments, the vent valve 213 includes a buoyancy member 2132, which passes through the vent hole 211a and has its two ends exposed on the upper and lower sides of the top sealing cover 211, respectively. The density of the buoyancy member 2132 is less than that of water. When the water level is lower than the top sealing cover 211 and the water contacts the buoyancy member 2132, the buoyancy member 2132 opens the vent hole 211a under the action of buoyancy. When the water level is higher than the top sealing cover 211 and the dishwasher's circulation pump is working, the buoyancy member 2132 is pushed down by the water flow to close the vent hole 211a.

[0061] Thus, when the water level is lower than the top sealing cover 211 and the water contacts the buoyancy component 2132, the buoyancy component 2132 will open the vent 211a under the action of buoyancy, so that the gas in the filter inner cavity 11c can be discharged from the vent 211a. When the water level is higher than the top sealing cover 211 and the dishwasher's circulation pump is working, the water in the filter inner cavity 11c will flow under the action of the circulation pump, and drive the elastic component 2131 to close the vent 211a, thereby preventing water from directly entering the filter inner cavity 11c through the drain hole, so that water can only enter the filter inner cavity 11c through the cylindrical filter screen 212.

[0062] It should be noted that when the water level is lower than the top sealing cover 211, the buoyancy component 2132 will close the vent 211a under the action of gravity. The gas in the filter cavity 11c will be discharged from the filter holes of the cylindrical filter screen 212. The gas in the filter cavity 11c can open the vent 211a by pushing the buoyancy component 2132. At this time, the opening of the buoyancy component 2132 is very small, only for gas to be discharged, which can prevent water from directly entering the filter cavity 11c through the vent 211a.

[0063] Please refer to Figure 10 In some embodiments, the buoyancy member 2132 includes a sealing part 2133, a connecting part 2134, and a limiting part 2136. The sealing part 2133 is disposed on the upper surface of the top sealing cover 211 and is used to close the vent hole 211a. The connecting part 2134 is connected to the sealing part 2133 and passes through the vent hole 211a. The limiting part 2136 is connected to one end of the connecting part 2134 that passes through the vent hole 211a and is used to abut against the lower surface of the top sealing cover 211 to limit the upward movement of the buoyancy member 2132. The limiting part 2136 has a first venting channel 2137 communicating with the vent hole 211a.

[0064] Thus, after water comes into contact with the buoyancy member 2132, the buoyancy member 2132 will rise under the action of buoyancy to open the vent 211a. When the water level is higher than the vent 211a, the limiting part 2136 abuts against the lower surface of the top sealing cover 211 to limit the buoyancy member 2132 and prevent it from detaching from the vent 211a. At the same time, when the limiting part abuts against the top sealing cover 211, the air in the filter cavity 11c can be discharged from the vent 211a through the first vent channel 2137. It should be noted that after the limiting part 2136 abuts against the top sealing cover 211, the gas in the filter cavity 11c first passes through the first vent channel 2137, then enters the gap between the connecting part 2134 and the vent 211a and is discharged.

[0065] In some embodiments, the connecting portion 2134 has a second exhaust passage 2135, which connects the first exhaust passage 2137 and the exhaust port 211a. With this configuration, gas can be discharged not only through the gap between the connecting portion 2134 and the exhaust port 211a, but also through the second exhaust passage 2135, thereby improving the gas discharge efficiency.

[0066] In some embodiments, the upper end wall of the vent 211a is provided with a guide slope 2113. The inner diameter of the guide slope 2113 decreases from top to bottom, and the outer diameter of the upper end of the connecting portion 2134 decreases from top to bottom to match the guide slope 2113. With this configuration, when the buoyancy member 2132 closes the vent 211a under the action of water flow, the guide slope 2113 guides the sealing portion 2133 to seal the vent 211a, thereby preventing the sealing portion 2133 from being misaligned and causing the vent 211a to be not completely sealed. This improves the sealing accuracy of the buoyancy member 2132 and ensures that the buoyancy member 2132 can completely seal the vent 211a.

[0067] In some embodiments, the sealing part 2133 is provided with a sealing cap, the diameter of which is larger than the diameter of the vent hole 211a. The sealing cap abuts against the upper surface of the top sealing cover 211, and the upper surface of the sealing cap is inclined downward from the inside out. This arrangement allows the sealing cap to divert water from above, preventing water from directly entering the filter cavity 11c through the vent hole 211a. Furthermore, the larger diameter of the sealing cap compared to the vent hole 211a ensures a better seal for the vent hole 211a.

[0068] In some embodiments, the buoyancy member 2132 is hollow. This configuration reduces the weight of the buoyancy member 2132, making it easier for water to float the buoyancy member 2132. At the same time, during the process of water entering the filter inner cavity 11c, due to the small weight of the buoyancy member 2132, gas can be better forced out of the buoyancy member 2132 and discharged from the vent 211a.

[0069] Please refer to Figure 11 In some embodiments, the lower surface of the top sealing cover 211 is recessed with an air guide groove 211b, which is arranged around the circumference of the exhaust hole 211a, and the groove wall of the air guide groove 211b is inclined from bottom to top towards the exhaust hole 211a. With this arrangement, the gas in the filter cavity will flow to the exhaust hole 211a under the guidance of the groove wall of the air guide groove 211b, thereby facilitating the discharge of gas from the filter cavity 11c.

[0070] In some embodiments, the top sealing cap 211 includes a cap body 2111 and an air guide portion 2112. The cap body 2111 covers the top of the cylindrical filter screen 212, and the air guide portion 2112 is connected to the lower surface of the cap body 2111. From bottom to top, the horizontal cross-section of the air guide portion 2112 increases. With this configuration, the air guide portion 2112 can guide the gas in the filter inner cavity 11c to the cylindrical filter screen 212, allowing the gas to be discharged through the filter holes of the cylindrical filter screen 212. This prevents the gas in the filter inner cavity 11c from forming an air cavity that affects the filtration efficiency of the cylindrical filter screen 212, thereby improving the filtration efficiency of the filter 21.

[0071] In some embodiments, the horizontal cross-section of the air guide 2112 gradually increases from bottom to top. This arrangement allows gas to be better guided along the outer surface of the air guide 2112 to the cylindrical filter screen 212, thereby ensuring the discharge of gas from the filter cavity 11c.

[0072] In some embodiments, the air guide portion 2112 has an air guide surface 2114 disposed opposite to the cover 2111, the air guide surface 2114 including an air guide inclined plane and / or an air guide inclined arc surface. With this configuration, gas can be better guided along the outer surface of the air guide portion 2112 to the cylindrical filter screen 212, thereby ensuring that gas in the filter inner cavity 11c is discharged.

[0073] In some embodiments, the air guiding surface 2114 includes an air guiding inclined plane, which is inclined upward from one side of the air guiding part 2112 to the opposite side. With this configuration, gas can be guided along the air guiding inclined plane to the cylindrical filter screen 212, thereby ensuring that the gas in the filter cavity 11c is discharged.

[0074] In some embodiments, the air guiding surface 2114 includes two inclined air guiding planes. The two inclined air guiding planes are arranged obliquely upward from the middle of the air guiding part 2112 to the outside of the air guiding part 2112. With this arrangement, the gas can be guided to the cylindrical filter screen 212 along the two inclined air guiding planes, thereby ensuring that the gas in the filter cavity 11c is discharged.

[0075] In some embodiments, the air guide 2112 includes a pyramidal air guide 2112 and the air guide surface 2114 includes a pyramidal surface. With this configuration, gas can be guided along the pyramidal surface to the cylindrical filter screen 212, thereby ensuring that the gas in the filter cavity 11c is discharged.

[0076] In some embodiments, the air guide portion 2112 includes a conical air guide portion 2112, and the air guide surface 2114 includes a conical surface. This configuration allows gas to be guided along the conical surface to the cylindrical filter screen 212, thereby ensuring that gas is discharged from the filter cavity 11c.

[0077] In some embodiments, the vertical center line of the pyramidal air guide 2112 or the conical air guide 2112 is collinear with the central axis of the filter 21. This configuration allows both the pyramidal and conical air guides 2112 to uniformly guide the gas within the filter cavity 11c to the cylindrical filter screen 212, thereby preventing gas from concentrating and causing blockage at the same location on the cylindrical filter screen 212, and thus improving the efficiency of gas discharge.

[0078] In some embodiments, the angle formed by the pyramidal or conical surface and the horizontal cross-section of the air guide 2112 is α, where 15°≤α≤75°. This configuration allows for a larger inclination angle of the pyramidal or conical surface, which better guides the gas flow to the cylindrical filter 212, thereby improving the efficiency of gas discharge.

[0079] In some embodiments, the air guide 2112 and the cover 2111 are integrally formed. This configuration simplifies the structure of the filter device 100, thereby facilitating the assembly of the filter device 100, improving the production efficiency of the filter device 100, and reducing the cost of the filter device 100.

[0080] Please refer to Figure 8 In some embodiments, the filter 21 further includes a plurality of support ribs 2141, which are arranged at intervals along the circumference of the cover 2111 and surround the outer periphery of the air guide 2112, with their top ends connected to the lower surface of the cover 2111 and / or the air guide 2112; wherein the cylindrical filter screen 212 is arranged around the outer periphery of the plurality of support ribs 2141 or is clamped by the support ribs 2141. This arrangement improves the support strength of the filter 21 by providing the support ribs 2141. Simultaneously, clamping the cylindrical filter screen 212 with the support ribs 2141 or circling the cylindrical filter screen 212 around the support ribs 2141 reduces the need for connection structures, thereby simplifying the structure of the filter 21, improving the production efficiency of the filter device 100, and reducing the cost of the filter device 100.

[0081] In some embodiments, at least two of the cover 2111, air guide 2112, cylindrical filter screen 212, and support rib 2141 are integrally disposed. This arrangement simplifies the structure of the filter device 100, thereby facilitating the assembly of the filter device 100, improving the production efficiency of the filter device 100, and reducing the cost of the filter device 100.

[0082] Please refer to Figure 2 In some embodiments, the filter 21 further includes a lower support ring 2146 and a sealing ring 2147. The lower support ring 2146 is connected to the bottom end of a plurality of support ribs 2141, and its outer peripheral wall is recessed with an annular groove 21462. The sealing ring 2147 is installed in the annular groove 21462 and seals against the cavity wall of the water collection chamber 11b. With this configuration, the gap between the lower support ring 2146 and the water collection shell 1 can be sealed by the sealing ring 2147, thereby preventing water from directly entering the filter cavity 11c from the gap between the lower support ring 2146 and the water collection shell 1 of the cylindrical filter screen 212, thus improving the filtration effect of the filter device 100.

[0083] Please refer to Figure 7In some embodiments, a snap fastener 21461 is provided on the side of the lower support ring 2146 opposite to the support ridge 2141, and a snap fastener groove 11r is provided on the cavity wall of the water collection chamber 11b, with the snap fastener 21461 engaging with the snap fastener groove 11r. With this configuration, during disassembly, the user only needs to rotate the filter 21 to disengage the snap fastener 21461 from the snap fastener groove 11r; during installation, the user only needs to rotate the filter 21 to engage the snap fastener 21461 with the snap fastener groove 11r, thus facilitating the user's disassembly, cleaning, or replacement of the filter 21.

[0084] 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 accompanying 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 accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0085] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0086] In the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0087] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0088] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

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 assembly includes a primary filter and a filter arranged sequentially along the water flow direction. The filter is disposed in the water collection chamber and divides the water collection chamber into an inner filter chamber and an annular outer chamber that is arranged around the outer periphery of the inner filter chamber and communicates with the water inlet. The filter includes a top sealing cover and a cylindrical filter screen disposed below the top sealing cover. as well as A push-suction water element is rotatably disposed in the inner cavity of the filter relative to the water collection shell. The push-suction water element includes a push surface and a suction surface disposed opposite to each other along the direction of rotation of the push-suction water element. During the rotation of the push surface, the pushing force on the water has a radial component to push the water out of the annular outer cavity. During the rotation of the suction surface, the suction force on the water has a radial component to draw the water into the inner cavity of the filter.

2. The filtration device as described in claim 1, characterized in that, The primary filter includes: A lifting cup is positioned at the water inlet and communicates with the annular outer cavity. The filter pore diameter of the lifting cup is larger than that of the cylindrical filter screen.

3. The filtration device as described in claim 2, characterized in that, The bottom of the cup includes: The overlapping area, covered by the top sealing cap, has a bottom filter hole or is in a closed configuration; and The enclosed area is not covered by the top sealing cap and is in a closed configuration.

4. The filtration device as described in claim 2, characterized in that, The cup is wrapped around the outer periphery of the cylindrical filter screen, and the entire bottom of the cup is not covered by the top sealing cap, and the bottom of the cup is completely closed; or The bottom of the cup is completely covered by the top sealing cap, and the bottom of the cup is provided with a bottom filter hole.

5. The filtration device as described in claim 2, characterized in that, The primary filter also includes: A planar filter is disposed at the water inlet and above the top sealing cover, and has an installation port in the middle, to which the cup can be detachably installed.

6. The filtration device as described in claim 5, characterized in that, The upper surface of the planar filter is inclined downwards towards the cup.

7. The filtration device as described in claim 5, characterized in that, The pore size of the planar filter is smaller than that of the cup, while the pore size of the planar filter is larger than that of the cylindrical filter screen.

8. The filtration device as described in claim 5, characterized in that, The cup-lifting ring is located on the outer periphery of the filter and between the filter and the flat filter, so that the entire bottom of the cup is not covered by the top sealing cap.

9. The filtration device as claimed in claim 5, characterized in that, The axial distance between the top sealing cap and the bottom of the cylindrical filter screen is H1, and the axial distance between the planar filter and the bottom of the cylindrical filter screen is H2, wherein H1 < H2.

10. The filtration device according to any one of claims 1-8, characterized in that, The top sealing cap has a vent hole; the filter also includes: An exhaust valve is movably disposed at the exhaust port; When the water level is below the top sealing cover, the vent valve opens the vent hole to release the gas below the top sealing cover; when the water level is above the top sealing cover, the vent valve closes the vent hole.

11. The filtration device as claimed in claim 10, characterized in that, The lower surface of the top sealing cover is recessed with an air guide groove, which is arranged around the vent hole, and the groove wall is inclined from bottom to top towards the vent hole.

12. The filtration device as claimed in claim 1, characterized in that, The top sealing cap includes: A cover body, which is placed on top of the cylindrical filter screen; and An air guide is connected to the lower surface of the cover, and the horizontal cross-section of the air guide increases from bottom to top.

13. The filtration device as claimed in claim 12, characterized in that, From bottom to top, the horizontal cross-section of the air guide gradually increases.

14. The filtration device as claimed in claim 1, characterized in that, Also includes: The drive assembly includes a drive shaft and a bearing. The drive shaft passes through the water collection shell and the cylindrical filter screen, and is connected to the top sealing cover through the bearing. The push-suction component is sleeved on the drive shaft so as to rotate with the drive shaft.

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 circulation pump is connected to the inner cavity of the filter; as well as A drainage pump is connected to the annular outer cavity.

16. The dishwasher as claimed in claim 15, characterized in that, The axial distance between the top sealing cap and the bottom of the cylindrical filter screen is H1. When the circulation pump is working, the axial distance between the liquid level in the washing chamber and the bottom of the cylindrical filter screen is H3, where H1 < H3.

17. The dishwasher as claimed in claim 15, characterized in that, Also includes: A spray element is disposed within the washing chamber and communicates with the circulating pump. The spray element includes at least one of an upper spray arm, a middle spray arm, and a lower spray arm.

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