A dishwasher having a cylindrical filter

Abstract

The application discloses a dishwasher with a cylindrical filter, which comprises an inner container for containing dishes to be washed, a lower concave sink being arranged at the bottom of the inner container, a drainage cavity with a drainage pump arranged in the cavity for draining water in the cavity, a cylindrical filter arranged in the sink, a drainage opening being arranged on the sink and communicating with the drainage cavity, and a through opening being arranged on the cylindrical filter and communicating with the drainage opening. The through opening arranged on the cylindrical filter and communicating with the drainage opening enables water in the cylindrical filter to directly flow into the drainage opening without passing through a filter screen, and then flow into the drainage cavity, thereby avoiding the difficulty in suction of the drainage pump caused by the blockage of the filter screen by small residues, ensuring the water supply to the drainage pump and realizing the normal drainage of the dishwasher.

Description

Technical Field

[0001] This invention belongs to the field of dishwasher technology, and specifically relates to a dishwasher with a cylindrical filter. Background Technology

[0002] A dishwasher is a device used to automatically clean tableware such as bowls, chopsticks, plates, dishes, knives, and forks. It reduces the workload of kitchen staff in restaurants, hotels, and government canteens, improves work efficiency, and enhances hygiene. Small dishwashers are gradually becoming common in households; however, because food residue often adheres to the tableware, dishwashers need to be equipped with a filter system.

[0003] During operation, the filtration system can only collect food residue. To prevent excessive food residue from accumulating in the dishwasher's filtration system, users need to remove the cylindrical filter after each wash, empty the food residue, wash it, and then put it back into the dishwasher. When filtering fine food residue, it is easy for it to stick to the filter screen, causing the cylindrical filter to become clogged. This makes it difficult for the drain pump to draw water, resulting in low drainage efficiency or even failure to drain properly, causing dishwasher malfunctions and inconvenience to users.

[0004] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0005] To address the aforementioned problems in the prior art, this invention proposes a dishwasher with a cylindrical filter. By providing an outlet on the cylindrical filter that communicates with the drain port, water supply to the drain pump is ensured, enabling the dishwasher to drain normally.

[0006] To achieve the above-mentioned objectives, the present invention employs the following technical solution:

[0007] A dishwasher with a cylindrical filter includes:

[0008] The inner liner is used to hold the dishes to be washed, and a recessed water trough is provided at the bottom of the inner liner;

[0009] A drainage chamber, which is equipped with a drainage pump for draining the water in the drainage chamber;

[0010] A cylindrical filter is installed inside the water tank;

[0011] A drain outlet communicating with the drain chamber is provided on the water tank, and an outlet communicating with the drain outlet is provided on the cylindrical filter.

[0012] Furthermore, a connecting pipe is provided between the water tank and the drain cavity, and a connecting cavity is provided on the water tank. The drain outlet is opened on the side wall of the connecting cavity near the cylindrical filter, and a connection port for connecting to the connecting pipe is opened on the side wall of the connecting cavity away from the cylindrical filter.

[0013] Furthermore, the cylindrical filter has a filter body with an upper opening, the filter body has a filter support and a filter screen disposed on the filter support, a support portion is provided on the filter support, and the opening is formed on the support portion.

[0014] Furthermore, the connecting cavity is located on the side wall of the water tank, and the supporting part is located adjacent to the side wall at the drain outlet of the connecting cavity.

[0015] Furthermore, a sealing arrangement is provided between the support and the side wall at the drain outlet, and a sealing ring is provided on the support and fitted onto the outside of the drain outlet.

[0016] Furthermore, an annular receiving groove is provided on the support portion, and the sealing ring is fixed in the receiving groove. The dimension of the sealing ring protruding from the outer end face of the support portion is greater than the dimension of the distance between the outer end face of the support portion and the sealing cavity.

[0017] Furthermore, the end face of the support portion that is close to the drain outlet is inclined outward in the upward direction, and the side wall at the drain outlet is inclined outward in the upward direction.

[0018] Furthermore, the filter body is provided with a blocking rib to prevent residue from flowing out of the inlet, and the blocking rib is spaced apart from the inlet.

[0019] Furthermore, a plurality of blocking ribs are provided on the bottom surface of the filter body, which are arranged radially and extend upward.

[0020] Furthermore, the blocking rib has a vertical surface near the inlet and an arc-shaped surface at both ends that are connected to the vertical surface and the bottom surface of the filter body, respectively.

[0021] Furthermore, a protruding positioning post is provided at the center of the water tank, and a positioning groove matching the positioning post is provided at the bottom of the filter body, with the positioning post located within the positioning groove.

[0022] Furthermore, the positioning post is provided with a positioning protrusion that protrudes radially outward, and the positioning groove is provided with a concave cavity that extends radially outward. When the filter body is rotated and engaged with the water tank, the positioning post is located in the positioning groove, and the positioning protrusion is rotatably located in the concave cavity.

[0023] Compared with the prior art, the advantages and positive effects of the present invention are as follows: By providing an opening on the cylindrical filter that communicates with the drain outlet, the water in the cylindrical filter can flow directly into the drain outlet without passing through the filter screen, and then into the drain chamber. This ensures that small residues do not clog the filter screen, which would cause difficulties in the drain pump's suction, and ensures the water supply to the drain pump, thus enabling the dishwasher to drain normally.

[0024] Other features and advantages of the present invention will become clearer after reading the detailed embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of an embodiment of a dishwasher with a cylindrical filter proposed in this invention;

[0027] Figure 2 for Figure 1 A schematic diagram of the middle section structure;

[0028] Figure 3 for Figure 2 A top view of the central spray structure;

[0029] Figure 4 for Figure 2 A bottom view of the central spray structure;

[0030] Figure 5 for Figure 1 Schematic diagram of the cross-sectional structure along the middle AA direction;

[0031] Figure 6 for Figure 5 Enlarged structural diagram of the central cylindrical filter;

[0032] Figure 7 for Figure 6 A magnified structural diagram of region C in the middle;

[0033] Figure 8 for Figure 1 Schematic diagram of the cross-sectional structure in the middle BB direction;

[0034] Figure 9 for Figure 8 Enlarged structural diagram of the central cylindrical filter;

[0035] Figure 10This is a schematic diagram of the structure of the water tank at the bottom of the inner tank;

[0036] Figure 11 This is a schematic diagram of the exploded structure of a cylindrical filter;

[0037] Figure 12 for Figure 11 Enlarged structural diagram of the upper and middle covers;

[0038] Figure 13 for Figure 11 Enlarged structural diagram of the overflow prevention structure;

[0039] Figure 14 for Figure 11 A magnified schematic diagram of the filter body;

[0040] Figure 15 for Figure 14 Enlarged structural diagram of the middle blocking rib;

[0041] Figure 16 for Figure 11 A structural diagram from another angle;

[0042] Figure 17 for Figure 16 A magnified schematic diagram of the filter body. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0044] In the description of this invention, it should be noted that the terms "upper," "lower," "left," and "right," etc., indicate the orientation or positional relationship based on the positional relationship shown in the accompanying drawings, with the direction closer to the center being "inner" and the opposite being "outer." These terms are used only for the convenience of describing the invention and for 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, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0045] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "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. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] See Figures 1-17 One embodiment of the dishwasher with a cylindrical filter proposed in this invention includes: a housing and an inner tub disposed within the housing, the inner tub being used to hold dishes to be washed. The housing is not shown in the accompanying drawings. Figure 1 and Figure 2 The bottom 10 of the inner tank is shown above, and a recessed water tank 13 is provided at the bottom 10 of the inner tank. A cylindrical filter 40 is provided in the water tank 13, and a drain outlet 131 communicating with the drain chamber 14 is provided on the water tank 13. An outlet 414 communicating with the drain outlet 131 is provided on the cylindrical filter 40. By providing an outlet 414 communicating with the drain outlet 131 on the cylindrical filter 40, water in the cylindrical filter 40 can flow directly into the drain outlet 131 without passing through the filter screen on the cylindrical filter 40, and then into the drain chamber 14. This ensures that small residues do not clog the filter screen, which would cause difficulty in suction by the drain pump 52, and ensures water supply to the drain pump 52, so as to realize normal drainage of the dishwasher.

[0047] A recessed filter chamber 16 is provided at the bottom 10 of the inner tub, and a flat filter screen 30 is placed on top of the filter chamber 16. The filter chamber is connected to the water tank 13 and also to the washing chamber. During dishwasher washing, a spray structure 20 is provided in the inner tub. The dishes are rinsed by the spray water flow, and then the water flows to the bottom 10 of the inner tub, is filtered by the flat filter screen 30, flows into the filter chamber, and then reaches the washing chamber. Then, driven by the washing pump 51, the water in the washing chamber is transported back to the spray structure 20 to complete one spray cycle. When the dishwasher is draining, a portion of the water in the bottom 10 of the inner tub is filtered by the flat filter screen 30 and flows into the filter chamber, then into the water tank 13, and then into the drain chamber 14 through the drain outlet 131; another portion of the water in the bottom 10 of the inner tub flows into the cylindrical filter 40 in the water tank. The water in the cylindrical filter 40 can reach the water tank 13 after passing through the filter screen 415, or directly flow into the drain chamber 14 through the outlet 414 and the drain outlet 131; the washing water in the drain chamber 14 is then discharged from the dishwasher by the drain pump 52.

[0048] See Figure 14 and Figure 17As shown, the cylindrical filter 40 has a filter body 41 with an upper opening. The filter body 41 has a filter support 416 and a filter screen 415 disposed on the filter support 416. A support portion 417 is provided on the filter support 416, and an opening 414 is formed in the support portion 417. By providing the support portion 417, it is convenient to set the opening 414, so that the opening 414 has a certain structural strength.

[0049] See Figure 14 and Figure 15 As shown, to prevent residue from flowing out of the filter body 41 through the inlet 414, especially to prevent large residue from flowing out and causing blockage of the pipe or entanglement of the drain pump 52, multiple blocking ribs 419 are provided inside the filter body 41 to prevent residue from flowing out of the inlet 414. The blocking ribs 419 are spaced apart from the inlet 414. When the washing water and residue in the filter body 41 flow towards the inlet 414, most of the residue is blocked by the blocking ribs 419, but small particles of residue can still flow out of the inlet 414 with the water flow. When the size of the residue is larger than the size between the blocking rib 419 and the edge of the inlet 414 or larger than the size between two adjacent blocking ribs 419, the residue is blocked. Specifically, multiple blocking ribs 419 are provided on the bottom surface of the filter body 41, which are arranged radially and extend upward. Residue is blocked between two adjacent blocking ribs 419 or between the blocking rib 419 and the support part 417. The blocking rib 419 has a vertical surface 4191 and an arc-shaped surface 4192 near the through-hole 414. One end of the arc-shaped surface 4192 is connected to the vertical surface 4191, and the other end is connected to the bottom surface of the filter body 41.

[0050] See Figure 9 As shown, a connecting pipe 15 is provided between the water tank 13 and the drain cavity 14, and a connecting cavity 132 is provided on the water tank 13 to achieve a sealed connection between the water tank 13 and the connecting pipe 15, and to ensure the communication between the drain outlet 131 and the connecting pipe 15; the connecting cavity 132 has a drain outlet 131 on the side wall near the cylindrical filter 40, and a connecting port 133 on the side wall away from the cylindrical filter 40. The connecting port 133 is sealed to the connecting pipe 15, and the end of the connecting pipe 15 passes through the connecting port 133 and extends into the connecting cavity 132.

[0051] In order to achieve the connection between the inlet 414 and the drain outlet 131, the connecting cavity 132 is provided on the side wall of the water tank 13, and the support part 417 is adjacent to the side wall of the drain outlet 131 on the connecting cavity 132; that is, the drain outlet 131 and the inlet 414 are arranged adjacent to each other, so that the water flowing out of the inlet 414 can directly reach the drain outlet 131.

[0052] The support part 417 and the side wall of the drain outlet 131 are sealed together. A sealing ring 418 is provided on the support part 417 and fitted on the outside of the through-hole 414. The sealing ring 418 is also fitted on the outside of the drain outlet 131. The sealing ring 418 seals the support part 417 and the side wall of the drain outlet 131, so that the water flowing into the drain outlet 131 must pass through the through-hole 414. That is, the washing water in the filter body 41 passes through the through-hole 414 and then flows into the connecting cavity 132 through the drain outlet 131. The washing water in the water tank 13 also needs to flow into the filter body 41 through the filter screen 415 and then flow out through the through-hole 414. This has the function of rinsing the filter screen 415, which can wash away the fine residues adhering to the inside of the filter screen 15, which is conducive to the self-cleaning of the column filter 40.

[0053] See Figure 14 and Figure 17 As shown, for the installation and fixing of the sealing ring 418, an annular receiving groove 4171 is provided on the support part 417. The sealing ring 418 is fixed in the receiving groove 4171. The size of the sealing ring 418 protruding from the outer end face of the support part 417 is greater than the size of the distance between the outer end face of the support part 417 and the sealing cavity 132. That is, the sealing ring 418 is squeezed between the side wall of the support part 417 and the drain outlet 131 to achieve direct sealing between the two.

[0054] To further ensure easy installation of the filter body 41 into the water tank 13, and to prevent the sealing ring 418 from coming off, the end face of the support part 417 near the drain outlet 414 is inclined outward in the upward direction, and the side wall at the drain outlet 414 is also inclined outward in the upward direction. This ensures convenient installation of the filter body 41 into the water tank 13 and prevents the sealing ring 418 from being prematurely squeezed and deformed. The water tank 13 has a structure that is wider at the top and narrower at the bottom.

[0055] In other embodiments, the support part 417 and the side wall at the drain outlet 131 may be arranged adjacent to each other, and there may be a water flow gap between the support part 417 and the side wall at the drain outlet 131 for water to flow through. Water in the water tank 13 can flow into the drain outlet 131 through the water flow gap, and washing water in the filter body 41 can flow into the drain outlet 131 through the inlet 414.

[0056] See Figure 9 , Figure 10 and Figure 17As shown, the cylindrical filter 40 is fixedly installed with the water tank 13. A protruding positioning post 134 is located at the center of the water tank 13, and a positioning groove 410 matching the positioning post 134 is located at the bottom of the filter body 41. The positioning post 134 is located within the positioning groove 410. When the cylindrical filter 40 is installed in the water tank 13, it is positioned by placing the cylindrical filter 40 downwards into the water tank 13, causing the positioning post 134 to be located within the positioning groove 410. Then, by rotating the cylindrical filter 40, the claws on the outside of the filter body 41 engage with the clips on the water tank 13, thus fixing the cylindrical filter 40 in place.

[0057] A positioning protrusion 1341 protrudes radially outward on the positioning post 134, and a recess 4101 extends radially outward within the positioning groove 410. When the filter body 41 rotates and engages with the water tank 13, the positioning post 134 is located within the positioning groove 410, and the positioning protrusion 1341 is rotatably located within the recess 4101. By setting the positioning protrusion 1341 and the recess 4101, the circumferential position of the filter body 41 during installation is further defined, ensuring that the claws on the outside of the filter body 41 are adjacent to the clips of the water tank 13, and ensuring that when the filter body 41 rotates, the positioning protrusion 1341 rotates within the recess 4101, thereby achieving engagement between the claws on the outside of the filter body 41 and the clips of the water tank 13.

[0058] See Figure 1 , Figure 5 and Figure 8As shown, a spray structure 20 is provided in the inner tank. The tableware is rinsed by the spray water flow, and the water then falls to the bottom 10 of the inner tank, is filtered by the flat filter screen 30, and flows into the washing chamber. Then, driven by the washing pump 51, the water in the washing chamber is transported back to the spray structure 20, completing one cycle of spraying. Food residue rinsed by the spray is filtered onto the flat filter screen 30, which is located on the bottom 10 of the inner tank. To collect the residue on the flat filter screen 30 into the cylindrical filter 40, an installation port 31 is provided on the flat filter screen 30, and the cylindrical filter 40 is located at the installation port 31. By placing the cylindrical filter 40 on the flat filter screen 30, it is beneficial to collect the residue on the flat filter screen 30, shortening the movement distance of the residue during collection and improving collection efficiency and collection rate. It also includes a spray structure 21, which sprays water to push the residue on the flat filter screen 30 clockwise or counterclockwise, thereby pushing the residue into the cylindrical filter 40. A recessed water tank 13 is provided at the bottom 10 of the inner tank. The cylindrical filter 40 passes through the mounting port 31 and is installed in the water tank 13, which is located above the water tank 13. The water tank 13 is connected to the drain chamber 14. During the dishwasher washing process, the washing water in the water tank 13 does not flow into the drain chamber 14, but the washing water in the inner tank flows into the washing chamber, achieving spray circulation.

[0059] See Figure 1 , Figure 5 , Figure 6 , Figure 12 As shown, the cylindrical filter 40 has a filter body 41 with an upper opening and an upper cover 42 located at the upper opening. The side of the upper cover 42 closest to the direction of movement of the residue on the flat filter screen 30 is the inflow side 425. An inlet 426 for water flow and residue passage is provided on the inflow side 425 of the upper cover 42, and a water passage hole 427 for water flow is provided on the upper cover 42. The jet structure 21 sprays water to push the residue on the flat filter screen 30 to move clockwise or counterclockwise, gradually approaching the inflow side 428. This allows the residue to enter the upper cover 42 with the water flow from the inlet 426, and the water flow can flow out from the water passage hole 427 of the upper cover 42, preventing the residue from flowing out with the water flow and facilitating the collection of residue into the flat filter screen 30. This allows the residue on the flat filter screen to enter the cylindrical filter, making it easier to clean the residue after washing and improving cleaning efficiency.

[0060] See Figure 12As shown, the upper cover 42 has a cover body 421 inclined downwards in the direction of movement of residue on the flat filter screen 30, and a cover wall 422 extending downwards along the outer edge of the cover body 421. Multiple circumferentially arranged inlet ports 426 are formed on the cover wall 422 on the inflow side 425. The cover body 421 is a planar structure with water passage holes 427 for water to flow through. Water reaching the cover body 421 can flow in or out through the water passage holes 4211. The inclined arrangement of the cover body 421 serves two purposes: firstly, it ensures that the height of the cover wall 422 gradually increases towards the outflow side 425, meaning the height of the cover wall 422 is maximum on the outflow side 425, guaranteeing that the inlet ports 426 have sufficient size to ensure smooth inflow of water and residue; secondly, it facilitates the outflow of water through the water passage holes 427. Preferably, the angle between the cover 421 and the horizontal plane is 4° to 8°, and the ratio of the highest height to the lowest height of the cover wall 422 is 2 to 3.

[0061] See Figures 2-4 As shown, the spray structure 21 can be a spray nozzle installed in the inner tank. The inclined arrangement of the spray nozzle forms a rotating water flow, which provides a driving force to the residue. Preferably, a spray structure 21 is provided on the rotating spray structure 20. In this embodiment, the spray structure 20 is a suspended spray arm located on the bottom surface 10 of the inner tank, making the distance between the spray structure 20 and the flat filter screen 30 smaller. A downwardly inclined spray structure 21 is provided at the lower end of the spray structure 20. During the washing process, the spray structure 20 is in a rotating state, that is, the spray structure 21 is also in a rotating state. First, it ensures that the water flow from the spray structure 21 can form a clockwise or counterclockwise rotating water flow. Most of the water flow should flow downward through the flat filter screen 30. The water flow from the spray structure 21 can definitely provide a driving force for the residue on the flat filter screen 30 to move clockwise or counterclockwise. Second, the rotation of the spray structure 21 allows the spray structure 21 to approach the flat filter screen 30 at various positions in the circumferential direction, providing a large driving force to various parts of the flat filter screen 30, ensuring that the residue located at different positions on the flat filter screen 30 can be pushed. If the spray structure 20 rotates clockwise, it will push the residue to move clockwise; if the spray structure 20 rotates counterclockwise, it will push the residue to move counterclockwise.

[0062] In other embodiments, the spray structure 21 can be multiple spray nozzles fixed in the inner tank. The inclined arrangement of the spray nozzles forms an inclined water flow, which provides a driving force for the residue of the flat filter screen 30 to move clockwise or counterclockwise.

[0063] See Figure 5 and Figure 13As shown, to further prevent residue flowing into the filter body 41 from flowing out with the water, the cylindrical filter 40 also has an anti-overflow structure 43. The anti-overflow structure 43 is used to block residue flowing into the filter body 41 from flowing out with the water. The anti-overflow structure 43 is located inside the filter body 41 and below the top cover 42. The anti-overflow structure 43 has a funnel-shaped body 431 for guiding the water and residue flowing into the filter body 41 downwards. An opening 432 is provided at the center of the funnel-shaped body 431, and the funnel-shaped body 431 is inclined downwards in a radially inward direction. Water and residue flowing in from the inflow side 425 of the top cover 42 reach the funnel-shaped body 431. Under the action of forward inertia and gravity, they move along the inclined surface of the funnel-shaped body 431 towards the opening 432 and fall into the filter body 41 below the funnel-shaped body 431. Preferably, the ratio of the inner diameter of the filter body 41 to the diameter of the opening 432 is 3 to 5. Since the size of the opening 432 is relatively small compared to the size of the filter body 41, the residue falling from the opening 432 is not easy to pass through the opening 432. Even if some residue reaches the funnel-shaped body 431, it continues to move forward under the action of forward flow inertia. When it reaches the water passage 427, the residue is filtered and blocked, and will not flow out of the column filter 40. Under the impact of the water flow, it falls back onto the funnel-shaped body 431.

[0064] See Figures 11-17 The diagram illustrates the assembly between the components of the cylindrical filter 40. The cylindrical filter 40 includes a filter body 41, a top cover 42, and an overflow prevention structure 43. The overflow prevention structure 43 is snapped and fixed onto the filter body 1, and the top cover 42 is snapped and fixed onto the overflow prevention structure 43.

[0065] The overflow prevention structure 43 is snapped and fixed onto the filter body 1. The filter body 41 is a cylindrical structure with an upper opening. The filter body 41 has a filter support 416 and a filter screen 415 disposed on the filter support 416. The upper end of the filter body 41 has an upper edge 411 extending radially outward. An extension edge 433 extending outward is provided on the upper edge of the funnel-shaped body 431. A slot 412 for accommodating the extension edge 433 is opened on the inner side of the upper edge 411 of the filter body 41. The extension edge 433 is located within the slot 412. By placing the extension edge 433 within the slot 412, the degrees of freedom of the overflow prevention structure 43 relative to the filter body 41 in downward movement and forward, backward, left, and right movement are limited.

[0066] To further limit the upward movement and rotational freedom of the overflow prevention structure 43, multiple inwardly extending baffles 413 are provided at intervals along the upper end of the filter body 41 along the 411. The radial dimension of the baffles 413 is larger than the radial dimension of the slot 412. A first clearance groove 434 is provided on the inner side of the extension 433 to avoid the baffles 413. The baffles 413 are located in the first clearance groove 434, which can limit the rotational movement of the overflow prevention structure 43. A stop block 435 matching the baffles 413 is provided on the funnel-shaped body 431. The stop block 435 is located below the baffles 413 and is used to limit the upward movement of the overflow prevention structure 43.

[0067] To allow multiple baffles 435 to be installed below the baffle protrusion 413, at least one U-shaped buckle 436 is provided on the funnel-shaped body 431. The buckle 436 has two opposing retaining walls, and a baffle 435 is provided on the retaining wall of the buckle 436 away from the axis of the funnel-shaped body 431. A hand-pressing block 4361 extending outward is provided on the retaining wall of the buckle 436 away from the axis of the funnel-shaped body 431. The hand-pressing block 4361 is used to engage or disengage the buckle 436. The hand-pressing block 4361 is located above the baffle protrusion 413. By pressing the hand-pressing block 4361 inward, the retaining wall of the buckle 436 moves inward, causing the baffle 435 on the buckle 436 to disengage from the baffle protrusion 413, thereby engaging and fixing the anti-overflow structure 43 to the filter body 41, or disengaging it from the filter body 41. Preferably, the buckle 436 is located on the side opposite to the inflow side 425 of the upper cover 42.

[0068] The upper cover 42 is snapped onto the anti-overflow structure 43. The upper cover 42 has a mounting edge 423 extending outward from the lower end of the cover wall 422, covering the extending edge 433. The mounting edge 423 is located within the slot 412. The mounting edge 423 has a horizontal portion above the extending edge 433 and a vertical portion outside the extending edge 433. A second clearance groove 424 is provided on the mounting edge 423 to avoid the stop protrusion 413.

[0069] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by the present invention.

Claims

1. A dishwasher having a cylindrical filter, characterized in that, The utility model provides a dish washing machine, including: Inner container for containing dishes to be washed, a lower concave sink is arranged at the bottom of the inner container; Drainage cavity is internally provided with a drainage pump for draining water in the drainage cavity; Cylindrical filter is arranged in the sink; Drainage opening is arranged on the sink and communicated with the drainage cavity, and the cylindrical filter is provided with a through opening communicated with the drainage opening; A flat filter screen is arranged at the bottom of the inner container, the cylindrical filter has an open-top filter body, an upper cover arranged at the open top, the upper cover is an inflow side near the moving direction of the residue on the flat filter screen, the inflow side of the upper cover is provided with an inflow opening for water flow and residue to pass through, and a water passing hole for water flow to pass through is arranged on the upper cover; The upper cover has a cover body arranged downwardly in the moving direction of the residue on the flat filter screen, a cover wall extending downwardly along the outer edge of the cover body, and a plurality of inflow openings circumferentially arranged on the cover wall of the inflow side; the cover body is a flat structure, a water passing hole for water flow to pass through is arranged on the cover body, water flow reaching the cover body can flow in or out through the water passing hole; the residue enters from the inflow opening of the upper cover along with the water flow, and the water flow flows out from the water passing hole of the upper cover, thereby avoiding the residue from flowing out along with the water flow, so that the residue on the flat filter screen enters the cylindrical filter; The anti-overflow structure has a bucket-shaped body, an extension along outwardly extending along the upper edge of the bucket-shaped body, a notch for accommodating the extension along is arranged on the inner side of the upper end of the filter body; an installation along outwardly extending along the lower end of the cover wall is arranged on the upper cover, the installation along has a horizontal part above the extension along and a vertical part outside the extension along, and the installation along is located in the notch.

2. The dishwasher according to claim 1, characterized in that A connecting pipe is arranged between the sink and the drainage cavity, a connecting cavity is arranged on the sink, the connecting cavity is provided with the drainage opening on the side wall of the side close to the cylindrical filter, and the connecting cavity is provided with a connecting opening connected with the connecting pipe on the side wall of the side away from the cylindrical filter.

3. The warewash machine of claim 2, wherein, The cylindrical filter has an open-top filter body, the filter body has a filter support and a filter screen arranged on the filter support, a support part is arranged on the filter support, and the through opening is arranged on the support part.

4. The warewash machine of claim 3 wherein, The connecting cavity is arranged on the side wall of the sink, and the support part is arranged adjacent to the side wall at the through opening of the drainage cavity.

5. The warewash machine of claim 4, wherein, The support part and the side wall at the drainage opening are sealingly arranged, a sealing ring is sleeved outside the through opening on the support part, and the sealing ring is also sleeved outside the drainage opening.

6. The warewashing machine of claim 3, wherein, The end surface of the support part close to the drainage opening is outwardly inclined in the upward direction, and the side wall at the drainage opening is outwardly inclined in the upward direction.

7. The dishwasher according to any one of claims 1 to 6, characterized in that The cylindrical filter has an open-top filter body, a blocking rib for preventing residue from flowing out of the through opening is arranged in the filter body, and the blocking rib is arranged in a spaced manner with the through opening.

8. The warewash machine of claim 7, wherein, A plurality of blocking ribs are arranged radially on the bottom surface of the filter body and extend upward, the blocking ribs have a vertical surface close to the opening, and arc-shaped surfaces connected to the vertical surface and the bottom surface of the filter body respectively.

9. The dishwasher according to any one of claims 1 to 6, characterized in that A positioning column is arranged on the center of the sink, a positioning groove is arranged on the bottom of the column filter, and the positioning column is located in the positioning groove. 10.The dish washer of claim 9, wherein A positioning convex is arranged on the positioning column and protrudes radially outward, the positioning groove is provided with a concave cavity extending radially outward, and when the filter body is rotated and engaged to the sink, the positioning column is located in the positioning groove, and the positioning convex is rotatably located in the concave cavity.

Images