CN219814052U - Filter system and dish washer - Google Patents

Abstract

The utility model discloses a filtering system and a dish washer, belongs to the technical field of household appliances, and is designed for solving the problems that sundries are easy to accumulate on the existing filtering system. The disclosed filtration system includes: the fine filter comprises a filter supporting rib and a filter screen covered on the filter supporting rib, and the cross section of the fine filter is gradually increased from top to bottom. The cross section of the filtering system and the fine filter of the dish washer is gradually increased from top to bottom, part of flushing water can pass through the filter screen from the outer side and enter the fine filter during water drainage, and in the process, the flushing water can flush sundries adhered to the inner wall of the filter screen, so that the cleaning difficulty of the fine filter is reduced.

Description

Filter system and dish washer

Technical Field

The utility model relates to the technical field of household appliances, in particular to a filtering system and a dish washing machine comprising the same.

Background

The dishwasher can repeatedly wash tableware, kitchen ware and the like to be cleaned by using cleaning liquid such as water and the like, and in order to improve the cleaning efficiency, the washing water needs to be filtered before returning again, so that sundries such as food residues and the like are prevented from being sprayed onto objects to be cleaned along with the washing water.

The existing dish washing machine is generally provided with a filtering device, and after flushing water carrying sundries such as food residues passes through the filtering device, the sundries are intercepted on the filtering device, and clean flushing water enters a circulating waterway. The existing filtering device generally comprises a fine filter and a water cup, wherein the water cup is respectively connected with a circulating water pipeline and a drainage pipeline, and the fine filter is arranged in the water cup.

Drawbacks of this filter device include: impurities are easy to adhere to the inner wall of the fine filter, so that the filtering efficiency of the fine filter is low, and even local areas are blocked; no matter filtering or draining, the water enters the corresponding pipeline after being filtered finely, the water flow resistance is large, the water flow is small, and the cleaning efficiency is low.

Disclosure of Invention

The utility model aims to provide a filtering system and a dish washing machine, which can automatically clean a fine filter by utilizing drainage water and have large water flow.

In order to achieve the purpose, on one hand, the utility model adopts the following technical scheme:

a filtration system comprising: the fine filter comprises a filter supporting rib and a filter screen covered on the filter supporting rib, and the cross section of the fine filter is gradually increased from top to bottom.

In one preferred embodiment, the filtration system further comprises: the plane filter screen is provided with a mounting through hole, and the top end of the fine filter is communicated with the mounting through hole; and the water cup comprises a cylindrical cup body, the plane filter screen covers the opening end of the top of the cup body, the fine filter is arranged in the cup body, a gap is formed between the top of the fine filter and the inner wall of the cup body, and the bottom edge of the fine filter is abutted to the inner wall of the cup body.

In one preferred embodiment, the water cup further comprises a supporting bottom plate positioned at the bottom opening end of the cup main body, a circulating water pipeline is arranged on the cup main body, a water draining pipeline is arranged on the supporting bottom plate, and the circulating water pipeline and the water draining pipeline are separated to two sides of the filter screen.

In one preferred embodiment, the filtering system further comprises a coarse filter connected to the fine filter, wherein a drain hole is formed in the coarse filter, and the inner space of the fine filter is communicated to the drainage pipeline through the drain hole.

In one preferred embodiment, the filtering system further comprises a sliding buckle, the coarse filter is provided with a clamping groove, the sliding buckle can be clamped on the fine filter after at least partially extending into the clamping groove, and the sliding buckle can be released from being clamped with the fine filter after being reset.

In one preferred embodiment, the sliding fastener is provided with a fastening plane, the fine filter is provided with a fastening surface and a limiting rib, the coarse filter is provided with a limiting block, and when the coarse filter is fastened on the fine filter, the front edge of the fastening plane is fastened on the fastening surface and the limiting block is abutted on the limiting rib.

In one preferred embodiment, the lower surface of the front edge of the clamping plane forms a pushing inclined plane.

In one preferred embodiment, the coarse filter is provided with a guiding sliding sheet, the sliding buckle is provided with a buckle limiting groove, the guiding sliding sheet is embedded in the buckle limiting groove, and the sliding buckle is configured to move along the extending direction of the guiding sliding sheet.

In one preferred embodiment, the filtering system further comprises an elastic piece, a retaining piece is arranged on the coarse filter, a first elastic piece fixing groove is formed in the retaining piece, a second elastic piece fixing groove is formed in the sliding buckle, and the elastic piece is installed between the first elastic piece fixing groove and the second elastic piece fixing groove.

In one preferred embodiment, the support bottom plate is provided with a circumferential limiting surface and an axial limiting surface, the circumferential limiting surface and the axial limiting surface form an L-shaped structure, the fine filter is provided with a clamping rib, and the clamping rib can be screwed into a space below the axial limiting surface when the fine filter rotates around the axis until the end head of the clamping rib is abutted to the circumferential limiting surface.

In one preferred embodiment, the support base plate is further provided with a radial stop, and a gap for accommodating the edge of the fine filter is formed between the radial stop and the L-shaped structure.

In one preferred embodiment, the filter system further comprises a handle cup disposed at the top end of the fine filter.

On the other hand, the utility model adopts the following technical scheme:

the dish washer, including the base, still include foretell filtration system, filtration system sets up on the base.

The cross section of the fine filter of the filtering system disclosed by the utility model is gradually increased along the top-down direction, part of flushing water can pass through the filter screen from the outer side to enter the fine filter during water discharge, and in the process, the flushing water can flush impurities adhered to the inner wall of the filter screen, so that the filtering effect of the fine filter is improved, the cleaning difficulty of the fine filter is reduced, and the continuous use duration of the filtering system is prolonged.

The dish washer disclosed by the utility model comprises the filtering system, the conical fine filter divides the interior of the water cup into a plurality of sections to form four water flow paths, the water flow resistance is small, the water flow is large, and the work efficiency of the dish washer is high.

Drawings

FIG. 1 is a schematic diagram of a filtration system according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of a filtration system provided in accordance with an embodiment of the present utility model;

FIG. 3 is an exploded view of a filtration system provided in accordance with an embodiment of the present utility model;

FIG. 4 is a schematic illustration of the water flow path of a filtration system provided in accordance with an embodiment of the present utility model;

FIG. 5 is a schematic view of a structure of a coarse filter according to an embodiment of the present utility model when the fine filter is fastened to the coarse filter;

FIG. 6 is a schematic view showing the structure of a coarse filter according to an embodiment of the present utility model when the fine filter is opened;

FIG. 7 is one of the cross-sectional views of a fine filter provided in an embodiment of the present utility model;

FIG. 8 is a second cross-sectional view of a fine filter provided in an embodiment of the present utility model;

FIG. 9 is a third cross-sectional view of a fine filter provided in accordance with an embodiment of the present utility model;

FIG. 10 is a schematic view of a fine filter according to an embodiment of the present utility model;

FIG. 11 is a schematic view of a coarse filter according to an embodiment of the present utility model;

FIG. 12 is a second schematic view of a coarse filter according to an embodiment of the present utility model;

fig. 13 is a schematic structural view of a sliding buckle according to an embodiment of the present utility model;

FIG. 14 is a second schematic view of a sliding buckle according to the embodiment of the present utility model;

FIG. 15 is a schematic view showing a combination structure of a coarse filter, an elastic member and a sliding buckle according to an embodiment of the present utility model;

FIG. 16 is a schematic view showing a combination structure of a fine filter, a coarse filter, an elastic member and a sliding buckle according to an embodiment of the present utility model;

FIG. 17 is a schematic view of a sliding clasp locking fine filter according to one embodiment of the present utility model;

FIG. 18 is a second schematic view of a sliding clasp locking fine filter according to an embodiment of the present utility model;

FIG. 19 is a schematic view of a structure of a sliding buckle after unlocking a fine filter according to an embodiment of the present utility model;

FIG. 20 is a second schematic view of a structure of a sliding buckle for unlocking a fine filter according to the embodiment of the present utility model;

FIG. 21 is a schematic view showing the structure of a coarse filter after opening a fine filter according to an embodiment of the present utility model;

FIG. 22 is a cross-sectional view of a water cup provided in accordance with an embodiment of the present utility model;

FIG. 23 is a schematic view showing a combined structure of a water cup and a fine filter according to an embodiment of the present utility model;

FIG. 24 is a schematic view showing a partial structure of a fine filter, a coarse filter and a cup assembly according to an embodiment of the present utility model.

In the figure:

1. lifting the cup; 2. a planar filter screen; 3. a fine filter; 4. a coarse filter; 5. an elastic member; 6. a sliding buckle; 7. a water cup; 8. a circulating water pipeline; 9. a drainage pipeline; 204. mounting through holes; 304. a filter clamping surface; 305. filter support ribs; 306. a clamping surface; 307. a limit rib; 308. a hinge post mount; 309. a hinge post; 310. clamping the rib; 311. a filter screen; 312. fine filtering limit surfaces; 401. a hinge hole; 402. a first elastic member fixing groove; 403. a clamping groove; 404. a guiding sliding vane; 405. a limiting block; 406. a weeping hole; 407. rotating the limiting surface; 408. a stop piece; 601. limiting convex edges; 602. pushing the inclined plane; 603. a buckle limit groove; 604. a poking block; 605. a second elastic member fixing groove; 606. a clamping plane; 701. a circumferential limit surface; 702. an axial limit surface; 703. a cup body; 704. a support base plate; 705. a radial stop; 1001. fine filtering drainage paths; 1002. fine filtration-free drainage paths; 1003. fine filtering the circulating waterway; 1004. and a fine filtration-free circulating waterway.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the utility model, which is therefore not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

The embodiment discloses a filter system and a dish washer comprising the filter system, in particular, the dish washer comprises a base, and the filter system is arranged on the base. As shown in fig. 1 to 3, the filtering system includes a handle cup 1, a planar filter screen 2, a fine filter 3, a coarse filter 4, an elastic member 5, a sliding buckle 6, and a water cup 7. Wherein, set up the installation through-hole 204 on the plane filter screen 2, set up the top at the fine filter 3 after carrying cup 1 passes the installation through-hole 204, and fine filter 3 sets up in drinking cup 7, and coarse filter 4 is connected on fine filter 3 and can open and shut for fine filter 3, and slip buckle 6 swing joint is on coarse filter 4, and elastic component 5 sets up between coarse filter 4 and slip buckle 6.

As shown in fig. 7 to 10, the fine filter 3 includes a filter support rib 305 provided obliquely and a filter screen 311 covering the filter support rib 305, and the cross section of the fine filter 3 gradually increases in the direction from the top down. That is, the cross section of the fine filter 3 along the axis is tapered with a narrow upper part and a wide lower part. The top edge of the fine filter 3 forms a filter clamping surface 304, a clamping hook (not shown) is arranged at the bottom of the carrying cup 1, and the clamping hook of the carrying cup 1 is buckled on the filter clamping surface 304, so that the carrying cup 1, the plane filter screen 2 and the fine filter 3 form an integral structure.

As shown in fig. 2, 4 and 22, the water cup 7 includes a cylindrical cup body 703 and a support base 704 provided at an opening end of the bottom of the cup body 703, a circulating water pipe 8 is provided in the cup body 703, and a drain pipe 9 is provided in the support base 704. The flat filter screen 2 covers the open end of the top of the cup body 703, and the top end of the fine filter 3 communicates to the mounting through hole 204. The cup body 703 is substantially straight, and the fine filter 3 is tapered, so that a gap is formed between the top of the fine filter 3 and the inner wall of the cup body 703, and the bottom edge of the fine filter 3 abuts against the inner wall of the cup body 703.

The specific contact position between the bottom edge of the fine filter 3 and the inner wall of the cup body 703 is not limited, and the circulating water pipe 8 and the drain pipe 9 may be separated from each other on both sides of the filter screen 311. As shown in fig. 4, when the dishwasher is opened in the circulating water pipeline 8, the water discharge pipeline 9 is closed, and the flushing water which is cleaned last time is divided into two paths, wherein one path is a fine-filtering-free circulating water path 1004, the flushing water enters the circulating water pipeline 8 without passing through the fine filter 3 after being filtered by the plane filter screen 2, the filtering effect of the plane filter screen 2 can ensure that the flushing water entering the circulating water pipeline 8 is qualified, the circulating pump is not damaged due to the carrying of sundries, the water flow resistance is small, the water flow is large, and the cleaning efficiency is high; the other path is a fine filtration circulating water path 1003, enters the fine filter 3 through the lifting cup 1, passes through the fine filter 3 and enters the circulating water pipeline 8. The flushing water returns to the inside of the dish washer through the circulating water pipeline 8 for the next cleaning.

After the dish washer works, the circulating water pipeline 8 is closed, the water draining pipeline 9 is opened, and two flushing water draining waterways are formed. One path is a fine filtering-free drainage path 1002, flushing water enters the fine filter 3 through the lifting cup 1 and then enters the drainage pipeline 9 through the coarse filter 4, impurities with relatively large volume in the flushing water are intercepted on the coarse filter 4, and relatively small impurities enter the drainage pipeline 9 after passing through the coarse filter 4 along with the flushing water, so that the flushing water is directly discharged, the water flow is large, and the drainage speed is high; the other path is a fine filtering drainage path 1001, and flushing water passes through the plane filter screen 2, then reaches between the fine filter 3 and the water cup 7, passes through a fine filter screen 311 on the side wall of the fine filter 3, enters the fine filter 3, and then enters the drainage pipeline 9 through the coarse filter 4.

As shown in fig. 5, the coarse filter 4 is engaged with the fine filter 3, and as can be seen from fig. 4 and 5, impurities adhere to the inner wall of the filter screen 311 when the flushing water flows along the fine filter circulation water path 1003 and the fine filter-free drain path 1002. When sundries are accumulated to a certain extent, the filtering efficiency of the filter screen 311 is reduced, even part of the area on the filter screen 311 is blocked, the flow of the circulating water pipeline 8 is reduced, and the working efficiency of the dish washer is further reduced. Fig. 6 shows that the coarse filter 4 opens the fine filter 3, and cleaning the inner wall of the fine filter 3 from the open end at the bottom of the fine filter 3 is still not easy, time consuming and laborious. When the flushing water flows along the fine filter drainage path 1001, the flushing water can pass through the filter screen 311 from the outer side and enter the fine filter 3, sundries adhered to the inner wall of the filter screen 311 can be flushed away in the process of passing through the flushing water, the filtering effect of the fine filter 3 is improved, the cleaning difficulty of the fine filter 3 is reduced, the continuous use duration of a filtering system is prolonged, and the dishwasher is better in use experience.

As shown in fig. 7 to 10, the fine filter 3 further includes a snap face 306, a stopper rib 307, a hinge post mount 308, a hinge post 309, a snap rib 310, and a fine filter stopper face 312. Wherein, the clamping ribs 310 are arranged on the outer side of the fine filter 3 and are close to the bottom opening end of the fine filter 3; the clamping surface 306 and the limiting rib 307 are arranged on the inner side of the fine filter 3 and close to the bottom opening end of the fine filter 3; the hinge post 309 is disposed on the hinge post mount 308, the hinge post mount 308 is disposed inside the fine filter 3 and near the bottom open end of the fine filter 3, and the hinge post mount 308 and the engagement surface 306 are symmetrically disposed about the axis of the fine filter 3; when the fine filter 3 is mounted in the cup 7, the fine filter stopper surface 312 abuts on the support base 704.

As shown in fig. 11 and 12, the coarse filter 4 includes a hinge hole 401, a first elastic member fixing groove 402, a clamping groove 403, a guide slide 404, a stopper 405, a drain hole 406, a rotation limiting surface 407, and a stopper piece 408, the hinge hole 401 and the clamping groove 403 are symmetrically disposed about the center of the coarse filter 4, the first elastic member fixing groove 402 is disposed on the stopper piece 408, the guide slide 404 is disposed in the clamping groove 403, the stopper 405 is disposed at the edge of the clamping groove 403, and the rotation limiting surface 407 is disposed near the hinge hole 401. The shape and size of the weep hole 406 are not limited and can be designed according to the volume of the foreign matter to be intercepted. As shown in fig. 4, the internal space of the fine filter 3 is communicated to the drain pipe 9 through the drain hole 406, and impurities small enough can be directly discharged after passing through the drain hole 406.

As shown in fig. 13 and 14, the sliding buckle 6 includes a limiting flange 601, a pushing inclined plane 602, a buckle limiting groove 603, a toggle block 604, a second elastic member fixing groove 605 and a clamping plane 606. The limiting convex edge 601 protrudes out of the side edge of the sliding buckle 6, and after the sliding buckle 6 moves forward for a set distance, the limiting convex edge 601 is clamped on the coarse filter 4, so that the whole sliding buckle 6 is prevented from penetrating out of the clamping groove 403; the clamping plane 606 is positioned at the top of the sliding buckle 6, and the lower surface of the front end edge of the clamping plane 606 forms a pushing inclined plane 602; the rear edge of the clamping plane 606 extends upwards to form a poking block 604, and a user applies force to the poking block 604 to push and pull the sliding buckle 6 (as shown by a straight line with double arrows in fig. 15); the clamping limiting grooves 603 are arranged on the left side and the right side of the sliding clamping buckle 6, and the extending direction of the clamping limiting grooves 603 is the same as the moving direction of the sliding clamping buckle 6; the second elastic member fixing groove 605 is located on the rear end face of the slide fastener 6.

As shown in fig. 15 to 21, the sliding buckle 6 can be clamped on the fine filter 3 after at least partially extending into the clamping groove 403, so that the coarse filter 4 and the fine filter 3 are locked together, and the locking structure is firm; after the sliding buckle 6 is reset, the clamping connection with the fine filter 3 can be released, and the coarse filter 4 can rotate around the hinge post 309, so that the bottom opening end of the fine filter 3 is opened, and the switch is convenient.

When the coarse filter 4 is fastened to the fine filter 3, the front end edge of the fastening plane 606 is fastened to the fastening surface 306, and the stopper 405 is abutted to the stopper rib 307. The engagement surface 306 and the stop rib 307 together define the position of the coarse filter 4 relative to the fine filter 3, both preventing the coarse filter 4 from opening the fine filter 3 and preventing the coarse filter 4 from entering the interior of the fine filter 3.

The guiding slide 404 of the coarse filter 4 is embedded in the clamping limit groove 603 of the sliding clamp 6, and the sliding clamp 6 is configured to move along the extending direction of the guiding slide 404, so as to avoid the sliding clamp 6 moving along the axial direction of the coarse filter 4.

The sliding buckle 6 can be pushed and pulled by hand, so that the filter system further comprises an elastic piece 5, and the elastic piece 5 is installed between the first elastic piece fixing groove 402 and the second elastic piece fixing groove 605 for convenience in use. When the sliding buckle 6 is pulled away from the clamping face 306 by the poking block 604 (as shown in fig. 19 and 20), the elastic piece 5 is in a compressed state; when the force applied to the toggle block 604 is removed, the elastic member 5 can push the sliding buckle 6 to move toward the clamping surface 306 (as shown in fig. 17 and 18) until the front edge of the clamping plane 606 is buckled with the clamping surface 306.

The hinge hole 401 on the coarse filter 4 is sleeved on the hinge post 309 of the fine filter 3, and the coarse filter 4 can rotate around the hinge post 309 to realize the opening and closing of the fine filter 3. Specifically, the sliding buckle 6 is pulled along the direction indicated by the straight line with the arrow in fig. 19, so that the front edge of the clamping plane 606 is completely separated from the clamping plane 306, and the coarse filter 4 can be rotated and opened around the hinge post 309; after the coarse filter 4 is turned by about 180 degrees, the rotation limiting surface 407 of the coarse filter 4 abuts against the fine filtering limiting surface 312 of the fine filter 3 (as shown in fig. 21), so that the coarse filter 4 is prevented from continuing to turn, the turning angle of the coarse filter 4 is reduced, and the use is more convenient.

After the impurities adhering to the fine filter 3 and the coarse filter 4 are emptied, the coarse filter 4 is rotated reversely about the hinge post 309. When the coarse filter 4 is about to be buckled on the emptying fine filter 3, the pushing inclined surface 602 abuts against the clamping surface 306, the clamping plane 606 is pressed, the clamping surface 306 can push the sliding buckle 6 to retreat (the sliding buckle 6 moves away from the clamping surface 306) through the pushing inclined surface 602, and the elastic piece 5 is compressed; after the inclined plane 602 is pushed to thoroughly pass the clamping surface 306, the elastic piece 5 stretches and pushes the sliding buckle 6 to move forward (the sliding buckle 6 moves towards the clamping surface 306) until the front end edge of the clamping plane 606 is buckled with the clamping surface 306, and the locking of the coarse filter 4 and the fine filter 3 is completed.

As shown in fig. 22 to 24, a circumferential limit surface 701, an axial limit surface 702 and a radial stop block 705 are arranged on a support bottom plate 704 of the water cup 7, the circumferential limit surface 701 and the axial limit surface 702 form an L-shaped structure, and a gap for accommodating the edge of the fine filter 3 is formed between the radial stop block 705 and the L-shaped structure. The fine filter 3 is provided with the clamping rib 310, and when the fine filter 3 rotates around the axis, the clamping rib 310 can be screwed into the space below the axial limiting surface 702 until the end head of the clamping rib 310 abuts against the circumferential limiting surface 701. The circumferential limiting surface 701 can prevent the fine filter 3 from continuing to rotate, the axial limiting surface 702 can prevent the fine filter 3 from moving along the axial direction, the radial stop block 705 can prevent the fine filter 3 from moving towards the axial direction of the water cup 7, the assembly structure of the water cup 7 and the fine filter 3 is ensured to be more stable, and the fine filter 3 is prevented from shaking or shifting under the impact of water flow.

Note that the above is only a preferred embodiment of the present utility model and the technical principle applied. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, and that various obvious changes, modifications and substitutions may be made therein without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the above embodiments, but may be embodied in many other equivalent forms without departing from the spirit of the utility model, the scope of which is set forth in the appended claims.

Claims (13)

1. A filtration system, comprising:

-a fine filter (3) comprising filter support ribs (305) and a filter screen (311) covering the filter support ribs (305), the cross section of the fine filter (3) increasing from top to bottom.

2. The filtration system of claim 1, wherein the filtration system further comprises:

the plane filter screen (2) is provided with a mounting through hole (204), and the top end of the fine filter (3) is communicated with the mounting through hole (204); the method comprises the steps of,

the cup (7) comprises a cylindrical cup main body (703), wherein the plane filter screen (2) covers the opening end of the top of the cup main body (703), the fine filter (3) is arranged in the cup main body (703), a gap is formed between the top of the fine filter (3) and the inner wall of the cup main body (703), and the bottom edge of the fine filter (3) is abutted against the inner wall of the cup main body (703).

3. The filtering system according to claim 2, wherein the water cup (7) further comprises a supporting base plate (704) positioned at the bottom opening end of the cup main body (703), a circulating water pipeline (8) is arranged on the cup main body (703), a water draining pipeline (9) is arranged on the supporting base plate (704), and the circulating water pipeline (8) and the water draining pipeline (9) are separated on two sides of the filter screen (311).

4. A filter system according to claim 3, characterized in that the filter system further comprises a coarse filter (4) connected to the fine filter (3), the coarse filter (4) being provided with weep holes (406), the inner space of the fine filter (3) being connected to the drain line (9) through the weep holes (406).

5. The filtering system according to claim 4, further comprising a sliding buckle (6), wherein a clamping groove (403) is formed in the coarse filter (4), the sliding buckle (6) can be clamped on the fine filter (3) after at least partially extending into the clamping groove (403), and the sliding buckle (6) can be released from being clamped with the fine filter (3) after being reset.

6. The filtering system according to claim 5, wherein a clamping plane (606) is arranged on the sliding buckle (6), a clamping surface (306) and a limiting rib (307) are arranged on the fine filter (3), a limiting block (405) is arranged on the coarse filter (4), and when the coarse filter (4) is buckled on the fine filter (3), the front end edge of the clamping plane (606) is clamped on the clamping surface (306) and the limiting block (405) is abutted on the limiting rib (307).

7. The filter system of claim 6, wherein a lower surface of the front edge of the snap-fit flat (606) forms a push ramp (602).

8. The filter system according to claim 5, characterized in that the coarse filter (4) is provided with a guiding slide (404), the sliding catch (6) is provided with a catch limiting groove (603), the guiding slide (404) is embedded in the catch limiting groove (603), and the sliding catch (6) is configured to be movable in the extending direction of the guiding slide (404).

9. The filter system according to claim 5, further comprising an elastic member (5), wherein a retaining flap (408) is provided on the coarse filter (4), a first elastic member fixing groove (402) is provided on the retaining flap (408), a second elastic member fixing groove (605) is provided on the sliding buckle (6), and the elastic member (5) is installed between the first elastic member fixing groove (402) and the second elastic member fixing groove (605).

10. The filtering system according to any one of claims 3 to 9, wherein the supporting base plate (704) is provided with a circumferential limiting surface (701) and an axial limiting surface (702), the circumferential limiting surface (701) and the axial limiting surface (702) form an L-shaped structure, the fine filter (3) is provided with a clamping rib (310), and the clamping rib (310) can be screwed into a space below the axial limiting surface (702) when the fine filter (3) rotates around an axis until the end head of the clamping rib (310) is abutted on the circumferential limiting surface (701).

11. The filter system according to claim 10, characterized in that the support base plate (704) is further provided with radial stops (705), a gap being formed between the radial stops (705) and the L-shaped structure for receiving the rim of the fine filter (3).

12. The filtration system according to any one of claims 1 to 9, further comprising a handle cup (1), the handle cup (1) being arranged at the top end of the fine filter (3).

13. Dishwasher comprising a basement, characterized in that it further comprises a filtration system according to any one of claims 1 to 12, said filtration system being provided on said basement.