Filter assembly and dishwasher

Abstract

A filter assembly and a dishwasher. The filter assembly comprises: a water cup (11), the water cup (11) being provided with a water collection cavity (101) and a filter cavity (106) in communication with the water collection cavity (101), and the water collection cavity (101) being used for collecting washing water; a filter screen (171), the filter screen (171) being provided in the filter cavity (106) and being used for separating residues and water in the washing water; a circulation pump (161), the circulation pump (161) being used for pumping the water separated from the washing water; and a drainage pump (162), the drainage pump (162) being used for discharging the residues separated from the washing water.

Description

Filter assembly and dishwasher

[0001] Cross-reference to related applications

[0002] The present application claims priority to the Chinese patent application No. 202411311271.9, filed on September 19, 2024, with the Chinese Patent Office, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of kitchen appliances, in particular to a filter assembly and a dishwasher BACKGROUND

[0004] The dishwasher applies internal circulating water for jet washing, so as to reduce water consumption. During the washing process, food residues enter the water, which are filtered through the filter screen. As the food residues accumulate, the holes on the filter screen are gradually blocked by large particles, reducing the water inflow of the water pump, affecting the water jet intensity of washing, and causing the tableware to be not clean. In order to ensure the washing effect of the dishwasher, the user must clean the filter screen regularly.

[0005] In the existing internal circulation system, the residues are always flushed by the circulating water, and small particles of residues can enter the cleaning water and be brought to the tableware, causing secondary pollution of the tableware. In order to ensure the washing effect of the dishwasher, there are usually the following solutions: 1) increasing the filter screen area to reduce the frequency of cleaning the filter screen by the user; 2) using a scraper to clean the side where the residues accumulate on the filter screen.

[0006] However, increasing the filter screen area increases the cost of the filter screen; when the scraper is cleaned, the residues are squeezed and enter the water pump through the filter screen, causing secondary pollution, affecting the cleaning effect, affecting the performance and service life of the filter screen, and also increasing the secondary pollution and affecting the cleaning effect. In addition, the residues adhere to the filter screen, and the residues are difficult to discharge.

[0007] SUMMARY

[0008] One object of the present application is to provide a filter assembly which can collect washing water by using a water collecting cavity and filter the washing water by using a filter screen, so as to improve the filtering effect and filtering efficiency of the washing water.

[0009] Another object of the present application is to provide a dishwasher.

[0010] The filter assembly according to the embodiments of the present application is used in a dishwasher, and comprises a water cup, a filter screen, a circulating pump and a drain pump. The water cup is provided with a water collecting cavity and a filter cavity communicating with the water collecting cavity, and the water collecting cavity is used for collecting washing water. The filter screen is arranged in the filter cavity and used for separating residues and water in the washing water. The circulating pump is used for pumping the water separated from the washing water. The drain pump is used for discharging the residues separated from the washing water.

[0011] According to the filter assembly of the embodiments of the present application, the washing water can be collected by the water collecting cavity and filtered by the filter screen, so that the filtering effect and filtering efficiency of the washing water can be improved.

[0012] In addition, the filter assembly according to the above embodiments of the present application can further have the following additional technical features:

[0013] In some embodiments, the filter assembly further comprises a flushing device configured to flush the filter screen.

[0014] In some embodiments, the flushing device is arranged downstream of the filter screen and has a water jet nozzle configured to jet water towards the filter screen.

[0015] In some embodiments, the filter screen is in the shape of a cylinder, the flushing device comprises at least one backflushing spray arm arranged inside the filter screen, and the water jet nozzle is arranged on the backflushing spray arm.

[0016] In some embodiments, the backflushing spray arm extends along the axis of the filter screen and deviates from the central axis of the filter screen, and the water jet range of the water jet nozzle of the at least one backflushing spray arm covers the filter screen along the axis of the filter screen.

[0017] In some embodiments, the flushing device is connected to the outlet of the circulating pump; and / or, the water cup is provided with a water distribution structure for connecting the spray arm, the outlet of the circulating pump is connected to the water distribution structure, the circulating pump is connected to a flushing branch, one end of the flushing branch is connected to the outlet, and the other end of the flushing branch is connected to the flushing device.

[0018] In some embodiments, the filter screen is rotatably arranged in the filter cavity.

[0019] In some embodiments, the filter screen is configured to rotate freely; or, the filter assembly further comprises a driving member, the driving member is drivingly connected to the filter screen, and the driving member is configured to drive the filter screen to rotate.

[0020] In some embodiments, the filter assembly further comprises a filter cavity turbulence member arranged in the filter cavity and configured to agitate the washing water in the filter cavity.

[0021] In some embodiments, the filter cavity turbulence member is rotatably arranged in the filter cavity; or, the filter cavity turbulence member comprises a plurality of blades distributed along the circumferential direction; or, the filter cavity turbulence member is relatively stationary with respect to the filter screen or is relatively stationary with respect to the filter cavity; or, at least a portion of the filter cavity turbulence member is located in the lower part of the filter cavity.

[0022] In some embodiments, the filter screen is in a cylindrical shape, a peripheral wall of the filter screen is configured to filter the washing water, the circulating pump is in communication with an inner side of the filter screen, and an outer side of the filter screen is in space communication with the water collecting cavity and the drain pump.

[0023] In some embodiments, the water collecting cavity and the filter cavity are arranged side by side, and a peripheral wall of the water collecting cavity is provided with a filter cavity inlet in communication with the filter cavity.

[0024] In some embodiments, a peripheral wall of the filter cavity is provided with a vent hole, the vent hole is arranged on an upper side of the peripheral wall of the filter cavity, and is in communication with an outer space of the water cup for balancing the internal and external air pressure of the filter cavity.

[0025] In some embodiments, a filter screen aperture of the filter screen is configured to be not less than 0.1 mm and not more than 1 mm; or, a filter screen aperture of the filter screen is configured to be not less than 0.6 mm and not more than 1 mm.

[0026] In some embodiments, the water collecting cavity and the filter cavity extend along an up-down direction and penetrate through a top surface of the water cup, an upper end opening of the water collecting cavity is configured to form a water inlet, and an upper end of the filter cavity is provided with a filter cavity cover for closing the filter cavity.

[0027] In some embodiments, the filter screen is positioned on the filter cavity cover; and / or, the filter cavity cover is detachably connected with the water cup.

[0028] A dishwasher according to an embodiment of the present application comprises the filter assembly as described above. BRIEF DESCRIPTION OF DRAWINGS

[0029] FIG. 1 is a schematic view of a filter assembly according to an embodiment of the present application.

[0030] FIG. 2 is a schematic view of a filter assembly according to an embodiment of the present application from one direction.

[0031] FIG. 3 is a schematic view of a filter assembly according to an embodiment of the present application from another direction.

[0032] FIG. 4 is a sectional view of a filter assembly according to an embodiment of the present application.

[0033] FIG. 5 is a sectional view of a filter assembly according to an embodiment of the present application.

[0034] FIG. 6 is an exploded view of a filter assembly according to an embodiment of the present application.

[0035] FIG. 7 is a sectional view of a filter assembly according to another embodiment of the present application.

[0036] 10, filter assembly; 11, water cup; 111, flow channel plate; 112, water separation structure; 101, water collecting cavity; 106, filter cavity; 171, filter screen; 172, filter cavity inlet; 173, filter cavity outlet; 161, circulating pump; 162, drainage pump; 18, flushing device; 181, backflushing spray arm; 13, driving member; 141, first gear; 143, third gear; 174, filter cavity turbulence member; 175, filter cavity cover; 151, flat filter screen; 152, filter cup. DETAILED DESCRIPTION

[0037] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein the same or similar components or components having the same or similar functions are denoted by the same or similar reference numerals throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0038] As shown in FIGS. 1-7, the filter assembly 10 according to an embodiment of the present application is used in a dishwasher, and the filter assembly 10 comprises a water cup 11 provided with a water collecting cavity 101 for collecting washing water and a filter cavity 106 communicating with the water collecting cavity 101. The filter assembly 10 further comprises a filter screen 171 arranged in the filter cavity 106 for separating residues from the washing water. In addition, the filter assembly 10 further comprises a circulating pump 161 for pumping the water separated from the washing water and a drainage pump 162 for discharging the residues separated from the washing water. The filter cavity 106 can be provided with a filter cavity inlet 172 and a filter cavity outlet 173, wherein the filter cavity inlet 172 can communicate with the water collecting cavity 101, the filter cavity 106 can be connected to the circulating pump 161, and the drainage pump 162 can be connected to the filter cavity inlet 172 or arranged in a residue discharge structure of the filter cavity 106.

[0039] Specifically, the washing water in the washing process of the dishwasher flows into the water collecting cavity 101, and then flows from the water collecting cavity 101 into the filter cavity 106. Under the filtering effect of the filter screen 171, water and residues are separated, the filtered water flows to the circulating pump 161, and under the driving effect of the circulating pump 161, the water sent out from the filter cavity outlet 173 is sent into a spray arm for cleaning tableware. The water sprayed by the spray arm flows into the water collecting cavity 101 after cleaning the tableware. In the drainage process, the residues are discharged by the drainage pump 162.

[0040] According to the filter assembly 10 of the present application, the washing water can be collected by the water collecting cavity 101, and the filter screen 171 can be used for filtering, so that the filtering effect and filtering efficiency of the washing water can be improved.

[0041] In the present application, the filter cavity 106 can be configured to temporarily store the residue, and a residue discharge port can be provided on the filter cavity 106 for discharging the residue. The drain pump 162 can be in communication with the residue discharge port, and a switch valve can be provided on the residue discharge port to close the residue discharge port during the filtering process of the filter assembly 10 and to open the residue discharge port during the residue discharging process. The switch valve can be a one-way valve.

[0042] As shown in FIGS. 4-6, in some embodiments, the filter assembly 10 further comprises a flushing device 18 configured to flush the filter screen 171. The flushing device 18 can be used to clean the surface of the filter screen 171 to maintain the filtering performance of the filter screen 171.

[0043] Optionally, the flushing device 18 is arranged downstream of the filter screen 171 and has a nozzle configured to spray water towards the filter screen 171. In this way, the filter screen 171 can be back-flushed to improve the cleaning effect of the filter screen 171. Of course, the flushing device 18 can also be arranged upstream of the filter screen 171 and configured to spray water towards the filter screen 171, which can also achieve the cleaning effect of the filter screen 171.

[0044] Further, as shown in FIGS. 4 and 5, the filter screen 171 is configured in a cylindrical shape, wherein the inner space of the filter screen 171 is in communication with the circulating pump 161, and the outer space of the filter screen 171 is in communication with the water collecting cavity 101 and the drain pump 162. When the filter screen 171 is filtering, the washing water can flow from the outer space of the filter screen 171 to the inner space of the filter screen 171 and be filtered by the peripheral wall of the filter screen 171. The outer space of the filter screen 171 is configured to be upstream of the filter screen 171, and the inner space of the filter screen 171 is configured to be downstream of the filter screen 171. Optionally, the flushing device 18 comprises at least one back-flushing spray arm 181 arranged in the inner space of the filter screen 171, and the nozzle of the back-flushing spray arm 181 is arranged to face the filter screen 171. The back-flushing spray arm 181 can be used to quickly clean the filter screen 171 and improve the cleaning efficiency and effect of the filter screen.

[0045] Optionally, the back-flushing spray arm 181 is arranged to extend along the axis direction of the filter screen 171 and deviate from the central axis of the filter screen 171, so that the nozzle of the back-flushing spray arm 181 can be close to the peripheral wall of the filter screen 171 to improve the impact force and flushing effect of the water flow on the filter screen 171. The water spraying range of the nozzle of the at least one back-flushing spray arm 181 covers the filter screen 171 along the axis direction of the filter screen 171, that is, the flushing area of the back-flushing spray arm 181 can cover the entire filter screen 171 along the axis direction, thereby improving the flushing range of the filter screen 171 to achieve effective flushing. In addition, the filter screen 171 of the present application can be configured to be rotatable, so that the entire filter screen 171 can be flushed and cleaned by the back-flushing spray arm 181 during the flushing process.

[0046] Optionally, the backflush spray arms 181 can be provided in plurality, and the plurality of backflush spray arms 181 can be distributed along the circumference of the filter screen 171. In this way, the plurality of backflush spray arms 181 can cover the filtering area of the filter screen 171, and the arrangement density of the spray nozzles of the backflush spray arms 181 can be reduced, so as to improve the structural strength of the backflush spray arms 181 and the impact force of the spray nozzles.

[0047] In some embodiments, the backflush device 18 is connected to the outlet of the circulating pump 161. The circulating pump 161 can be used to deliver the water for backflushing to the backflush device 18, and the backflushing of the filter screen 171 can be achieved by the pumping action of the circulating pump 161. In this way, the structure of the filter assembly 10 can be simplified, and the backflushing of the filter screen 171 can be achieved simultaneously during the washing of the dishes in the dishwasher, so as to improve the filtering efficiency and effect of the filter assembly 10.

[0048] Optionally, the water cup 11 is provided with a water distribution structure 112 for connecting the spray arms. The outlet of the circulating pump 161 is connected to the water distribution structure 112, and the circulating pump 161 is connected with a backflush branch. One end of the backflush branch is connected to the outlet, and the other end is connected to the backflush device 18. In this way, the structure of the filter assembly 10 can be further simplified, and the cleaning efficiency and effect of the filter screen 171 can be improved.

[0049] In some embodiments, the filter screen 171 is rotatably arranged in the filter chamber 106. In this way, the rotation of the filter screen 171 can be used to clean the surface of the filter screen 171, so as to maintain the filtering performance of the filter screen 171. In addition, the aforementioned backflush device 18 can be combined to cover the filter screen 171 along the axial direction of the filter screen 171. At the same time, the rotation of the filter screen 171 can achieve the comprehensive backflushing of the filter screen 171, and the efficiency and effect of the surface cleaning of the filter screen 171 can be improved. In addition, the centrifugal force during the rotation of the filter screen 171 can separate the residues adhered to the surface from the filter screen 171, and the relative movement between the filter screen 171 and the water can also separate the residues adhered to the surface from the filter screen 171.

[0050] In some embodiments, the filter screen 171 can be freely rotatable. That is, the filter screen 171 can be arranged to rotate under the driving action of the water flow. In this way, the structure of the filter assembly 10 can be simplified, and the surface cleaning of the filter screen 171 can be conveniently achieved during the filtering process.

[0051] In some embodiments, the filter assembly 10 further comprises a driving member 13, and the driving member 13 is drivingly connected to the filter screen 171. The driving member 13 is used to drive the rotation of the filter screen 171. In this way, the rotation of the filter screen 171 can be driven by the driving member 13, and the passive rotation of the filter screen 171 can be achieved, so as to further improve the surface cleanliness of the filter screen 171 and the filtering effect of the filter screen 171.

[0052] Optionally, the driving member 13 is arranged side by side outside the water cup 11, and the filter assembly 10 further comprises a transmission assembly, which is in transmission connection with the driving member 13 and the filter screen 171 respectively, and is used for transmitting the rotary motion of the driving shaft of the driving member 13 to the filter screen 171. The arrangement of components of the filter assembly 10 can be optimized, the size of the filter assembly 10 in the up-down direction can be reduced, and the space utilization of the filter assembly 10 can be improved.

[0053] As shown in FIG. 5 and FIG. 6, the transmission assembly can comprise a first gear 141 and a third gear 143, the first gear 141 is in transmission connection with the driving member 13, the third gear 143 is in transmission connection with the first gear 141, and the second gear is in transmission connection with the filter screen 171. The transmission assembly can be arranged on the bottom wall of the water cup 11. In addition, the filter cavity outlet 173 can also be arranged on the bottom wall of the water cup 11, and the flow channel for connecting the circulating pump 161 can be integrated in the bottom wall of the water cup 11.

[0054] Optionally, the bottom of the water cup 11 is provided with a flow channel plate 111, the filter cavity outlet 173 is arranged on the flow channel plate 111, the flow channel plate 111 is provided with a flow channel connecting the filter cavity outlet 173 and the circulating pump 161, and the flow channel plate 111 is further provided with a gear cavity, and the first gear 141 and the third gear 143 are arranged in the gear cavity.

[0055] The transmission assembly can further comprise a first shaft, the upper end of the filter screen 171 is provided with a mounting hole, the upper end of the first shaft is arranged in the mounting hole, and the first shaft and the mounting hole can be in spline connection or the like, so as to drive the filter screen 171 to rotate by the centrifugal force of the first shaft, and the lower end of the first shaft is connected with the third gear 143. The driving shaft of the driving member 13 is connected with the first gear 141. The lower end of the first shaft is arranged in the hole on the flow channel plate 111 and is provided with a bearing and an oil seal.

[0056] As shown in FIG. 7, in some embodiments, the filter assembly 10 further comprises a filter cavity disturbing member 174, which is arranged in the filter cavity 106 and is used for stirring the washing water in the filter cavity 106. The filter cavity disturbing member 174 can be used to promote the disturbance of the fluid in the filter cavity 106, facilitate the collection of residues, and when the filter cavity 106 is discharged, the filter cavity disturbing member 174 can also be used to disturb the fluid in the filter cavity 106, so as to facilitate the emptying of the residues in the filter cavity 106, facilitate the cleaning of the dishwasher, avoid the breeding of bacteria, and improve the cleaning effect and safety of the dishwasher.

[0057] The filter cavity disturbing member 174 of the present application can have the following embodiments, but is not limited to them and their combinations.

[0058] In the first embodiment, the filter cavity disturbing member 174 is rotatably arranged in the filter cavity 106, and the filter cavity disturbing member 174 can realize the disturbance of the fluid in the filter cavity 106 by rotating.

[0059] In some embodiments, the filter cavity disturbance member 174 is provided with a plurality of blades distributed along the circumferential direction, which can improve the disturbance effect on the fluid in the filter cavity 106. The filter cavity disturbance member 174 can be provided in the form of rotating around the axis of the circumference, so that the plurality of blades can disturb the fluid in the filter cavity 106 during the rotation of the filter cavity disturbance member 174. Alternatively, the filter cavity 106 is provided with a rotatable filter screen 171, and the filter screen 171 is provided with blades at the end, which can agitate the residue and water mixture in the filter cavity 106, and facilitate the discharge of the residue. The filter screen 171 is provided with blades at the end, and when rotating, the blades can push the water to flush the surface of the side filter screen, so that the residue is separated from the filter screen.

[0060] In some embodiments, the filter cavity disturbance member 174 is relatively static with the filter screen 171. When the filter screen 171 rotates, the filter cavity disturbance member 174 can be driven to rotate, so that the driving structure of the filter cavity disturbance member 174 can be simplified.

[0061] In some embodiments, the filter cavity disturbance member 174 can be provided to be relatively static with the filter cavity 106, so that when the water flows through the filter cavity disturbance member 174, the vortex can be generated, and the vortex can be used to disturb the water flow.

[0062] In some embodiments, at least a part of the filter cavity disturbance member 174 is located in the lower part of the filter cavity 106. The disturbance effect on the fluid in the filter cavity 106 can be improved.

[0063] In some embodiments, the filter cavity disturbance member 174 is connected to the lower end of the filter screen 171 and is distributed along the direction around the filter screen 171.

[0064] As shown in FIG. 5, in some embodiments, the filter screen 171 is provided in the form of a cylinder, the peripheral wall of the filter screen 171 is used to filter the washing water, the circulating pump 161 is connected to the inner side of the filter screen 171, and the space outside the filter screen 171 is connected to the water collecting cavity 101 and the drain pump 162. The filtering area of the filter screen 171 can be increased, so that the filtering of a larger flow can be realized, and the washing efficiency of the dishwasher can be ensured. In combination with the aforementioned filter screen 171 which is provided to be rotatable around the axis of the filter screen 171 in the filter cavity 106, the filter cavity 106 can be provided with a filter cavity outlet 173, and the inner space of the filter screen 171 is opposite to the filter cavity outlet 173.

[0065] In some embodiments, the water collecting cavity 101 and the filter cavity 106 are distributed side by side, and the peripheral wall of the filter cavity 106 is provided with a filter cavity inlet 172 connected to the water collecting cavity 101. The washing water in the water collecting cavity 101 can flow into the filter cavity 106, which can facilitate the collection of the washing water in the water collecting cavity 101, and can also facilitate the filtering of the washing water and the storage of the residue in the washing cavity.

[0066] Optionally, the peripheral wall of the filtering cavity 106 is provided with a vent hole arranged on the upper side of the peripheral wall of the filtering cavity 106 and communicating with the external space of the water cup 11 for balancing the air pressure inside and outside the filtering cavity 106. The washing water in the water collecting cavity 101 can be conveniently discharged into the filtering cavity 106, which is beneficial to the filtering of the washing water by the filtering assembly 10 and effectively improves the filtering efficiency and effect.

[0067] In some embodiments, the filter mesh aperture of the filtering mesh 171 is not less than 0.1 mm and not more than 1 mm. When the filtering mesh 171 is rotatable and the rotating speed is high (for example, greater than 1000 rpm), the filter mesh aperture of the filtering mesh 171 can be appropriately enlarged, and optionally, the filter mesh aperture of the filtering mesh 171 is not less than 0.6 mm and not more than 1 mm. For example, the filter mesh aperture of the filtering mesh 171 can be 0.1 mm, 0.2 mm, 0.35 mm, 0.5 mm, 0.6 mm, 0.75 mm or 1 mm, etc. Of course, when the rotating speed of the filtering mesh 171 is low (for example, not more than 1000 rpm), the filter mesh aperture of the filtering mesh 171 can be appropriately reduced.

[0068] In some embodiments, as shown in FIG. 4, the water collecting cavity 101 and the filtering cavity 106 extend in the up-down direction, the upper end of the water collecting cavity 101 penetrates the top surface of the water cup 11, the upper end opening of the water collecting cavity 101 forms a water inlet, the upper end of the filtering cavity 106 penetrates the top surface of the water cup 11, and the upper end of the filtering cavity 106 is provided with a filtering cavity cover 175 for closing the filtering cavity 106. Therefore, the assembly and maintenance of the centrifugal assembly can be facilitated, and the assembly efficiency of the centrifugal assembly is improved.

[0069] The filtering mesh 171 is positioned on the filtering cavity cover 175, and the rapid assembly of the filtering cavity cover 175 can be achieved. Optionally, the filtering cavity cover 175 is detachably connected with the water cup 11. The rapid disassembly and assembly of the filtering cavity cover 175 can be facilitated, the stability of the centrifugal assembly is improved, and the state in the filtering cavity 106 can be conveniently observed, which is beneficial to the cleaning of the centrifugal assembly.

[0070] The filtering cavity cover 175 covers the water cup 11 and closes the filtering cavity 106, the peripheral surface of the filtering cavity cover 175 is provided with a groove portion, a centrifugal sealing ring is arranged along the periphery of the filtering cavity cover 175 and is matched in the groove portion, the centrifugal sealing ring closes the gap between the filtering cavity cover 175 and the inner peripheral surface of the filtering cavity 106, in addition, the filtering cavity cover 175 is further provided with a bearing, the upper end of the filtering mesh 171 is connected with the bearing, and the rotating connection between the filtering mesh 171 and the filtering cavity cover 175 is realized by the bearing. The upper end of the filtering mesh 171 is rotatably connected with the filtering cavity 106, and the lower end is rotatably connected with the water cup 11.

[0071] The flow channel plate 111 is provided with a flow channel, one end of the flow channel is connected with the filter cavity outlet 173, and the other end is communicated with the circulating pump 161. The peripheral wall of the filter cavity outlet 173 is provided with an opening communicated with the circulating pump 161, and the bottom wall is provided with an opening for the second shaft, and the second shaft is provided with an oil seal and a bearing between the second shaft and the flow channel plate 111.

[0072] In some embodiments, the centrifugal assembly further comprises: a planar filter screen 151, the planar filter screen 151 is provided with an opening, and the planar filter screen 151 is inclined downward from the periphery to the opening, and the upper end of the water collecting cavity 101 is open and opposite to the opening; and a filter cup 152, the filter cup 152 is arranged in the opening and the water collecting cavity 101. The planar filter screen 151 can be used to filter the washing water once, further improving the filtering effect of the washing water, and the filter cup 152 can store larger residues and can be removed for cleaning and the like. The filter screen (the filter cup 152 and / or the filter screen 171) in the application can be provided in a detachable structure, and can be taken out from the inside of the cleaning cavity, facilitating later maintenance.

[0073] The dishwasher according to the embodiments of the application comprises the filter assembly 10.

[0074] The filter assembly 10 of the application can comprise multi-stage filtering.

[0075] The first-stage filtering comprises the planar filter screen 151 and the filter cup 152. During the cleaning process, after the water washes the surface of the tableware, the water carries the residues to the bottom of the cleaning cavity, flows through the planar filter screen 151, and is collected in the water collecting cavity 101. The residues smaller than the aperture size of the planar filter screen 151 (the aperture size of the planar filter screen 151 is 0.5-2 mm) enter the water collecting cavity 101. The residues larger than the aperture size of the planar filter screen 151 enter the filter cup 152. The filter cup 152 has two aperture sizes, the aperture size of the side surface of the filter cup 152 is small, which can be set to 0.5-3 mm. The aperture size of the bottom of the filter cup 152 is large, which can be set to 5-10 mm. The residues larger than the aperture size of the bottom of the filter cup 152 need to be cleaned manually. The residues smaller than the aperture size of the side surface of the filter cup 152 and larger than the aperture size of the bottom of the filter cup 152 are discharged by the drain pump 162 during the drainage. The residues smaller than the aperture size of the side surface of the filter cup 152 enter the filter cavity 106. The first-stage filtering realizes the filtering of the residues larger than 3 mm.

[0076] The secondary filter includes a filter screen 171 and a driving member 13. The filter screen 171 has a pore size of 0.4-0.1 mm, preferably 0.25-0.35 mm. The water and residues entering the filter cavity 106 are filtered by the filter screen 171, and the small particles smaller than the filter screen can pass through the filter screen and enter the circulating pump 161 with the water. In addition, the secondary filter can also include a filter screen 171 having the same pore size as the filter screen 171, and the residues (having a size of 0.1-3 mm) larger than the pore size of the filter screen 171 enter the filter cavity 106. During drainage, the residues in the filter cavity 106 are discharged by the drainage pump 162. The filter screen 171 of the secondary filter is driven to rotate by the driving member 13. Under the action of centrifugal force, the residues are separated from the filter screen.

[0077] Specifically, the water filtered by the multi-stage filter is pressurized by the circulating pump 161, and most of the water enters the spray flow channel through the water distribution valve module. A small part of the water enters the backflush flow channel through the backflush flow channel opening provided on the pump outlet flow channel, is then distributed to the plurality of backflush spray arms 181, and is sprayed to the filter screen 171 through the backflush spray openings. The filter screen 171 is cleaned in a reverse direction from inside to outside, so that the contaminants adhered to the outer surface of the filter screen 171 are separated from the filter screen 171, and the filter screen has better water permeability. The filter screen is driven to rotate by the motor, so that the filter screen as a whole can be cleaned.

[0078] As described above, in some embodiments of the present application, the water cup 11 includes a filter cavity 106, and the circulating water pump sucks water into the pump cavity when the circulating water pump is working. A low-pressure area is formed at the inlet flow channel of the circulating pump 161, and the water collecting cavity 101 (or the aforementioned filter cavity 106) is a relatively high-pressure area. The contaminants outside the filter screen flow to the filter cavity along with the water, so that the residue collection function is achieved, and the contaminants are separated from the circulating water. Therefore, the water used for cleaning tableware is always clean water, and secondary contamination of the tableware is avoided.

[0079] During the cleaning process, the water filtered by the primary filter enters the filter cavity 106, and the residues are collected in the filter cavity 106 and separated from the main circulating water, so that the residue-water separation function is achieved. To solve the problem of residue blocking the filter screen 171, the filter screen 171 is provided with blades at the bottom, and the filter screen 171 is driven to rotate by the motor. The water flow driven by the blades washes the surface of the filter screen, so that the residues are separated from the surface of the filter screen. During drainage, the filter screen 171 rotates, and the impeller agitates the water in the filter cavity 106 to move, so that the residues move together with the water. The residues are discharged through the residue discharge port of the filter cavity 106. The centrifugal module mainly achieves the residue collection function and the residue-water separation function.

[0080] Optionally, the filter assembly 10 can further include at least one of a filter cavity 106, a filter screen 171, a filter cavity cover 175, a first shaft, a first gear 141, a third gear 143, a bearing, an oil seal, a sealing ring, a driving member 13, etc. The driving member 13 can be in transmission connection with the first gear 141, the first gear 141 is in transmission connection with the third gear 143, the third gear 143 is in transmission connection with the first shaft, and the first shaft is in transmission connection with the filter screen 171, so that the rotation driving of the driving member 13 is transmitted to the filter screen 171. In addition, the first shaft penetrates the filter cavity 106, and the end is connected with the transmission assembly, wherein the end of the first shaft can penetrate the bottom wall of the filter cavity 106, and the oil seal, the sealing ring, the bearing and other structures can be arranged between the first shaft and the bottom wall of the filter cavity 106.

[0081] The filter cavity 106 is provided with a filter screen 171, a backflush spray arm 181, a backflush spray port, a vent, a first shaft, a bearing, an oil seal, and a filter cavity cover 175. The outside of the filter cavity 106 is provided with a driving member 13, a first gear 141, and a third gear 143. In addition, the outside of the filter cavity 106 is further provided with a circulating pump 161, a water inlet channel, a backflush channel, and a water collecting cavity 101. The cleaning module of the filter screen 171 mainly realizes the functions of circulating water micro-filtration and backflush cleaning of the filter screen. The filter screen rotates under the driving of the motor, the blades push the water to move towards the filter surface, and the filter surface is flushed to separate the residues from the filter screen.

[0082] The water cup 11 of the present application can include a water collecting cavity 101 and a filter cavity 106. In addition, the water cup 11 can further include a residue collecting cavity, a drainage cavity, and a shunt cavity, etc. The residue collecting cavity can be in communication with the filter cavity 106, and part of the washing water in the filter cavity can be sent to the residue collecting cavity. The residue collecting cavity is in communication with the water collecting cavity 101 through a residue discharge port, and the residue discharge port is provided with a one-way valve. During cleaning, the one-way valve is closed, and the water collecting cavity 101 is separated from the residue collecting cavity. During drainage, the one-way valve is opened, and the water collecting cavity 101 is in communication with the residue collecting cavity. The water cup 11 mainly realizes the functions of backwater collection, residue collection, spray arm channel switching, and drainage and residue discharge, etc.

[0083] The aforementioned one-way valve can include a cover plate, a rubber cap, a bracket, a sealing ring, etc., and mainly realizes the opening and closing functions of the residue discharge port. The bracket can serve as a support and is assembled with the residue discharge port and sealed by the sealing ring. The bracket can be provided with an opening, the rubber cap can be connected with the bracket and arranged to be rotatable for opening and closing the opening, wherein the part of the rubber cap opposite to the opening is provided with a cover plate for providing support for the rubber cap to improve the sealing effect when the rubber cap closes the opening.

[0084] The bottom of the water cup 11 is provided with a channel plate 111, which can be integrated with a backflush spray arm 181, a backflush channel, an inlet channel of a circulating pump 161, a filter cavity outlet 173, and a gear cavity. It mainly realizes the functions of backflush cleaning of the filter screen and backflow of the circulating water into the circulating pump 161.

[0085] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0086] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0087] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0088] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0089] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0090] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A filter assembly for a dishwasher, wherein, The filter assembly comprises: a water cup, which is provided with a water collecting cavity and a filter cavity communicating with the water collecting cavity, the water collecting cavity being used for collecting washing water; a filter screen, which is arranged in the filter cavity and used for separating residues and water in the washing water; a circulating pump, which is used for pumping the water separated from the washing water; a drainage pump, which is used for discharging the residues separated from the washing water.

2. The filter assembly of claim 1, wherein, The filter assembly further comprises a flushing device, which is arranged to flush the filter screen.

3. The filter assembly of claim 2, wherein, The flushing device is arranged downstream or upstream of the filter screen and has a water jet nozzle facing the filter screen.

4. The filter assembly of claim 3, wherein, The filter screen is arranged in a cylindrical shape, the flushing device comprises at least one back-flushing spray arm arranged inside the filter screen, and the water jet nozzle is arranged on the back-flushing spray arm.

5. The filter assembly of claim 4, wherein, The back-flushing spray arm is arranged to extend along the axial direction of the filter screen and deviate from the central axis of the filter screen, and the water jet range of the water jet nozzle of the at least one back-flushing spray arm covers the filter screen along the axial direction of the filter screen.

6. The filter assembly of claim 2, wherein, The flushing device is communicated with the outlet of the circulating pump; and / or, the water cup is provided with a water distribution structure for connecting the spray arm, the outlet of the circulating pump is communicated with the water distribution structure, the circulating pump is connected with a flushing branch, one end of the flushing branch is communicated with the outlet, and the other end is communicated with the flushing device.

7. The filter assembly of any of claims 1-6, wherein, The filter screen is rotatably arranged in the filter cavity.

8. The filter assembly of claim 7, wherein, The filter screen is arranged to rotate freely; or, the filter assembly further comprises a driving member, the driving member is drivingly connected with the filter screen, and the driving member is used for driving the filter screen to rotate.

9. The filter assembly of any of claims 1-8, wherein, The filter assembly further comprises a filter cavity turbulence member, which is arranged in the filter cavity and used for stirring the washing water in the filter cavity.

10. The filter assembly of claim 9, wherein, The filter cavity turbulence member is rotatably arranged in the filter cavity; or, the filter cavity turbulence member comprises a plurality of blades which are distributed in the circumferential direction; or, the filter cavity turbulence member is relatively stationary with respect to the filter screen or relatively stationary with respect to the filter cavity; or, the filter cavity turbulence member is connected to the lower end of the filter screen and is distributed in the direction around the filter screen.

11. The filter assembly of any of claims 1-10, wherein, The filter screen is arranged in a cylindrical shape, the circumferential wall of the filter screen is used for filtering the washing water, the circulating pump is communicated with the inside of the filter screen, and the space outside the filter screen is communicated with the water collecting cavity and the drainage pump; and / or, the water collecting cavity and the filter cavity are distributed side by side, the circumferential wall of the filter cavity is provided with a filter cavity inlet communicated with the water collecting cavity; and / or, the circumferential wall of the filter cavity is provided with a vent hole, the vent hole is arranged on the upper side of the circumferential wall of the filter cavity and is communicated with the external space of the water cup for balancing the internal and external air pressures of the filter cavity; and / or, the filter screen aperture of the filter screen is arranged to be not less than 0.1 mm and not more than 1 mm; or, the filter screen aperture of the filter screen is arranged to be not less than 0.6 mm and not more than 1 mm.

12. The filter assembly of any of claims 1-11, wherein, The water collecting cavity and the filter cavity extend along the up-down direction and penetrate through the top surface of the water cup, the upper end opening of the water collecting cavity forms a water inlet, and the upper end of the filter cavity is provided with a filter cavity cover used for closing the filter cavity.

13. The filter assembly of claim 12, wherein, The filter screen is positioned on the filter cavity cover; and / or, the filter cavity cover is detachably connected with the water cup.

14. The filter assembly of any of claims 1-13, wherein, The filter assembly further comprises: a flat filter screen having an opening, and being arranged to slope downwardly from a periphery to the opening, the upper end of the water collecting cavity being open and opposite to the opening; a filter cup penetrating the opening and the water collecting cavity.

15. A dishwasher, wherein, A filter assembly comprising any one of claims 1-14.

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