Self-cleaning filter and washing machine thereof

Abstract

The present invention provides a self-cleaning filter and a washing machine thereof. The self-cleaning filter provided by the present invention is intended to solve the problem in the prior art that the filter screen in the filter is easily clogged, thereby shortening the service life of the filter. The present invention provides a filter chamber and a bypass line within the filter cylinder, arranges the filter water path within the filter chamber and the bypass water path within the bypass line in parallel, and provides a filter screen on the wall of the bypass line near the filter chamber. The bypass line is provided with multiple protrusions on the inner wall of the bypass line away from the filter chamber. Water flowing into the bypass line from the water inlet is obstructed by the protrusions, which changes the flow direction of the water and the extrusion force it receives, thereby backwashing and squeezing the filter screen, flushing away sediment on the surface of the filter screen, and delaying the clogging of the filter screen, thereby achieving the self-cleaning function of the filter.

Description

Technical Field

[0001] The present invention belongs to the technical field of household electrical appliances, and in particular relates to a self-cleaning filter and a washing machine thereof. Background Art

[0002] Microplastics and microfibers, typically fibers or particles under 5mm in size, are increasingly polluting the marine environment. Due to their small size and large surface area, microplastics and microfibers have a strong ability to absorb pollutants. They act like a trap for marine pollutants. When microplastics and microfibers combine with marine pollutants and roam the ocean, they are easily ingested by marine life, directly harming the marine ecosystem. Humans are at the top of the food chain, so microplastics and microfibers can enter the human body through ecological cycles, posing a significant threat to human health.

[0003] According to research from the Coastal Cities Ecological Impact Research Center at the University of Sydney, one of the main sources of microplastics and microfibers in the ocean is wastewater discharged from washing machines. As the study indicates, over 1,900 tiny fibers are washed away with each load of clothing. To prevent microfibers in wastewater from entering the ocean, existing technologies typically install a microfiber filter in the washing machine's drain line to filter out the tiny fibers and impurities before draining the water out of the machine. As microfiber filters age, a large amount of microfibers and impurities accumulate on the surface of the filter, causing the filter to lose its filtering function. This is typically done by rotating the filter with an external motor, using an air purge device, or scraping with a brush. This requires additional accessories and is costly. Therefore, how to extend the service life of microfiber filters while reducing costs has become a pressing technical issue.

[0004] For example, Chinese patent application number 201010624970.0 discloses a washing machine with an improved filter for a drainage circuit, comprising: a washing tub; a drainage trough in fluid communication with the interior of the washing tub and with the drainage circuit; and a filter connected to or connectable to the drainage trough. The filter includes a filtering surface for allowing liquid to pass through and preventing objects of a fixed size from passing through, and at least one bypass line for bypassing the filtering surface and directing the flow of washing liquid from the washing tub to the bottom of the drainage trough. The bypass line has a non-perforated side surface to ensure that substantially all washing liquid entering the line from the washing tub flows into the drainage trough. Although this patent provides a bypass line within the filter, the bypass line only serves to direct water flow from the bypass line to the drainage trough when the filtering surface becomes clogged, and does not delay clogging of the filtering surface or increase the service life of the filter.

[0005] In view of this, the present invention is proposed. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art. On one hand, the present invention provides a self-cleaning filter that can delay clogging of the filter screen and has a low cost.

[0007] Another aspect of the present invention provides a washing machine having the self-cleaning filter.

[0008] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0009] A filter cartridge having a water inlet and a water outlet;

[0010] A filter screen is installed in the filter cylinder to form a filter cavity between the water inlet and the water outlet for water to pass through;

[0011] at least one bypass pipe, disposed in the filter cylinder, communicating with the water inlet and the water outlet, and configured to guide water flowing from the water inlet to the water outlet;

[0012] A filtering waterway communicating with the water inlet and the water outlet is provided in the filtering chamber, a bypass waterway communicating with the water inlet and the water outlet is provided in the bypass pipe, and the filtering waterway and the bypass waterway are arranged in parallel;

[0013] The pipe wall of the bypass pipe close to the filter cavity is composed of the filter mesh, and the inner pipe wall of the bypass pipe away from the filter cavity is provided with a plurality of protrusion structures.

[0014] In the above scheme, by providing multiple protrusion structures on the inner tube wall of the bypass pipe, the water flow from the water inlet into the bypass pipe is hindered by the protrusion structure, which will change the flow direction of the water flow and the extrusion force it receives, thereby reversely flushing and squeezing the filter screen, washing away the sediment on the surface of the filter screen to delay the clogging of the filter screen, which not only realizes the self-cleaning function of the filter, but also reduces the production and operation costs.

[0015] Furthermore, a plurality of protrusion structures are distributed at intervals on the inner tube wall;

[0016] Preferably, the distribution density of the protrusion structures located downstream of the bypass waterway is greater than the distribution density located upstream of the bypass waterway.

[0017] In the above solution, sediment on the filter surface upstream of the bypass waterway will, to a certain extent, be impacted downstream by the continuous influx of water, resulting in a greater degree of clogging on the filter surface downstream than upstream. By setting the distribution density of the raised structures downstream of the bypass waterway to be greater than that upstream, the frequency of water flow changes at the downstream location can be increased, thereby increasing the impact force on the sediment on the filter surface. Furthermore, as the distribution density increases, the squeezing force on the water flow also increases, effectively squeezing the filter in the opposite direction, thereby removing sediment adhering to the filter.

[0018] Furthermore, the height of the protruding structure protruding from the wall surface of the inner tube is H, and the distance from the wall surface of the inner tube to the filter is L, which satisfies 0.10L≤H≤0.50L;

[0019] Preferably, 0.25L≤H≤0.35L is satisfied.

[0020] In the above scheme, by setting the relationship between the height of the protruding structure protruding from the wall surface of the inner tube wall and the distance from the wall surface of the inner tube wall to the filter screen within the above range, it can not only ensure that the water flow can produce a sufficient number of direction changes, but also enable the water flow to squeeze the filter screen to a greater extent when squeezed, thereby improving the self-cleaning ability of the filter.

[0021] Furthermore, the protrusion structure is at least one of a pyramidal shape, a conical shape, and a columnar shape;

[0022] Preferably, the protruding structure is in the shape of a quadrangular pyramid.

[0023] Furthermore, the wall of the bypass line away from the filter cavity abuts against the inner wall of the filter cylinder;

[0024] Alternatively, the pipe wall of the bypass pipe away from the filter cavity is an integral structure with the inner wall of the filter cylinder.

[0025] Furthermore, the bypass inlet of the bypass pipeline and the filter inlet of the filter chamber are respectively connected to the water inlet, and a one-way valve is provided at the bypass inlet of the bypass pipeline;

[0026] Preferably, the one-way valve includes a first baffle located at the bypass inlet, for blocking or opening the bypass inlet;

[0027] One end of the second baffle is fixedly connected to the first baffle through a shaft sleeve, and the other end is extended toward the filter inlet of the filter cavity to partially block the filter inlet.

[0028] Furthermore, a rotating shaft is provided at one end of the filter screen close to the bypass inlet and the filter inlet, and the shaft sleeve is sleeved on the rotating shaft;

[0029] An included angle α is formed between the first baffle and the second baffle, satisfying 90°<α<180°;

[0030] Preferably, 120°≤α≤150° is satisfied.

[0031] In the above solution, when water flows through the filter inlet and into the filter chamber for filtration, the impact of the water flow on the second baffle causes the shaft sleeve to rotate along the shaft, allowing the first baffle to block the bypass inlet. If the filter becomes clogged, the impact of the water flow on the second baffle is reduced, and the water pressure forces the first baffle to automatically open the bypass inlet, allowing water to flow into the bypass pipe. When the filter is unblocked and filtration can resume, the water flows back through the filter inlet into the filter chamber. When the water flow strikes the second baffle again, it drives the first baffle to block the bypass inlet. This achieves automatic switching of water flow between the filter chamber and the bypass pipe, without affecting the normal operation of the washing machine.

[0032] Furthermore, the filter screen is a cylindrical structure, circumferentially arranged along the extension direction of the central axis of the filter cylinder, and connected to the water inlet to form the filter cavity.

[0033] A washing machine is provided with any one of the above-mentioned self-cleaning filters.

[0034] Furthermore, the washing machine comprises:

[0035] A housing, wherein a mounting opening is provided on a front panel of the housing, and the self-cleaning filter is detachably mounted in the mounting opening;

[0036] Preferably, a mounting channel is provided in the housing, and the self-cleaning filter is detachably mounted in the mounting channel through the mounting opening;

[0037] The height of the installation channel from the ground on a side close to the installation opening is greater than the height of the installation channel from the ground on a side away from the installation opening.

[0038] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0039] The self-cleaning filter provided by the present invention is provided with a plurality of protrusion structures on the inner tube wall of the bypass pipe. The water flow flowing into the bypass pipe from the water inlet is obstructed by the protrusion structures, which will change the flow direction of the water flow and the extrusion force it receives, thereby reversely flushing and squeezing the filter screen, washing away the sediment on the surface of the filter screen to delay the clogging of the filter screen. This not only realizes the self-cleaning function of the filter, but also reduces the production and operation costs.

[0040] The self-cleaning filter provided by the present invention can increase the frequency of water flow changes at the downstream position by setting the distribution density of the protrusion structure at the downstream position of the bypass waterway to be greater than the distribution density at the upstream position of the bypass waterway, thereby increasing the impact force on the sediment on the surface of the filter screen; in addition, as the distribution density increases, the extrusion force exerted on the water flow also increases, which can better reversely squeeze the filter screen, thereby squeezing out the sediment attached to the filter screen.

[0041] The self-cleaning filter provided by the present invention controls the relationship between the height of the protruding structure from the wall surface of the inner tube wall and the distance from the wall surface of the inner tube wall to the filter screen within a reasonable range, thereby not only ensuring that the water flow can make a sufficient number of changes in direction, but also enabling the water flow to squeeze the filter screen to a greater extent when squeezed, thereby improving the self-cleaning ability of the filter.

[0042] The self-cleaning filter provided by the present invention can realize automatic switching of water flow between the filter chamber and the bypass pipeline by designing a simple valve structure at the bypass inlet of the bypass pipeline, thereby not affecting the normal operation of the washing machine.

[0043] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive effort. In the accompanying drawings:

[0045] Figure 1 It is a structural schematic diagram of the washing machine of the present invention.

[0046] Figure 2 This is a schematic structural diagram of the self-cleaning filter of the present invention installed in a washing machine.

[0047] Figure 3 This is a structural schematic diagram of the self-cleaning filter of the present invention.

[0048] Figure 4 This is another structural schematic diagram of the self-cleaning filter of the present invention.

[0049] Figure 5 It is a structural schematic diagram of the one-way valve of the present invention.

[0050] Figure 6 This is another structural schematic diagram of the self-cleaning filter of the present invention.

[0051] In the figure: 100, washing machine; 10, self-cleaning filter; 11, filter cylinder; 12, water inlet; 13, water outlet; 14, filter chamber; 15, bypass pipe; 16, inner pipe wall; 17, raised structure; 18, bypass inlet; 19, filter screen; 20, filter inlet; 21, first baffle; 22, second baffle; 23, bushing; 24, outer casing; 25, front panel; 26, installation port; 27, installation channel.

[0052] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0054] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0055] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0057] like Figures 3 to 6As shown, the present invention provides a self-cleaning filter, comprising: a filter cylinder 11 having a water inlet 12 and a water outlet 13; a filter screen 19 installed in the filter cylinder 11, forming a filter chamber 14 for water to flow through between the water inlet 12 and the water outlet 13; at least one bypass pipe 15 provided in the filter cylinder 11, communicating with the water inlet 12 and the water outlet 13, and used for guiding water flowing in from the water inlet 12 to the water outlet 13; a filter water channel communicating with the water inlet 12 and the water outlet 13 is provided in the filter chamber 14, a bypass water channel communicating with the water inlet 12 and the water outlet 13 is provided in the bypass pipe 15, and the filter water channel and the bypass water channel are arranged in parallel;

[0058] The pipe wall of the bypass pipe 15 close to the filter chamber 14 is formed by the filter mesh 19 , and the inner pipe wall 16 of the bypass pipe 15 away from the filter chamber 14 is provided with a plurality of protrusion structures 17 .

[0059] As an implementation scheme, the filter screen is a planar structure (not shown in the figure) and is arranged along the extension direction of the central axis of the filter cylinder. The filter screen with the planar structure separates the filter cylinder into a filter cavity and a bypass line, that is: a filter cavity is formed between the filter screen with the planar structure and one side wall of the filter cylinder, and a bypass line is formed between the filter screen with the planar structure and the other side wall of the filter cylinder. The bypass line is provided with multiple protrusion structures on the inner tube wall opposite to the filter screen.

[0060] As another embodiment, the filter screen is a cylindrical structure, which is circumferentially arranged along the extension direction of the central axis of the filter cylinder to form the filter cavity, and the bypass pipe is formed between the filter screen and the inner wall of the filter cylinder. The bypass pipe is provided with multiple protrusion structures on the inner pipe wall opposite to the filter screen.

[0061] As another embodiment, the filter screen is a semi-cylindrical structure (not shown in the figure), that is, the part of the filter screen close to the side wall of one side of the filter cylinder is arranged along the extension direction of the central axis of the filter cylinder, and a filter cavity is formed between the filter screen and the side wall on one side, and a bypass pipe is formed between the filter screen and the side wall on the other side of the filter cylinder. The bypass pipe is provided with multiple protrusion structures on the inner pipe wall opposite to the filter screen.

[0062] In all the above schemes, by providing multiple protrusion structures on the inner tube wall of the bypass pipe, the water flow from the water inlet into the bypass pipe is hindered by the protrusion structure, which will change the flow direction of the water flow and the extrusion force it receives, thereby reversely flushing and squeezing the filter screen, washing away the sediment on the surface of the filter screen to delay the clogging of the filter screen, which not only realizes the self-cleaning function of the filter, but also reduces the production and operation costs.

[0063] It is understandable that the structure of the filter screen is not limited to the above-mentioned range. Any filter screen with any structure that can separate the filter cylinder into a filter cavity and a bypass line, and can achieve the above-mentioned technical effects by using multiple protrusion structures provided on the inner tube wall opposite to the filter screen of the bypass line, falls within the scope of protection of the present invention.

[0064] In some embodiments, as Figure 3 and Figure 4 As shown, a plurality of protrusion structures 17 are spaced apart and distributed on the inner tube wall 16;

[0065] Preferably, the distribution density of the protruding structures 17 located downstream of the bypass waterway is greater than that located upstream of the bypass waterway.

[0066] In the above solution, sediment on the filter surface upstream of the bypass waterway will, to a certain extent, be impacted downstream by the continuous influx of water, resulting in a greater degree of clogging on the filter surface downstream than upstream. By setting the distribution density of the raised structures downstream of the bypass waterway to be greater than that upstream, the frequency of water flow changes at the downstream location can be increased, thereby increasing the impact force on the sediment on the filter surface. Furthermore, as the distribution density increases, the squeezing force on the water flow also increases, effectively squeezing the filter in the opposite direction, thereby removing sediment adhering to the filter.

[0067] In addition, the water flowing into the bypass pipe can be sewage to be filtered or filtered water without microfibers.

[0068] In some embodiments, the height of the protruding structure 17 protruding from the inner tube wall 16 is H, and the distance from the inner tube wall 16 to the filter 19 is L, which satisfies 0.10L≤H≤0.50L;

[0069] Preferably, 0.25L≤H≤0.35L is satisfied.

[0070] In the above scheme, by setting the relationship between the height of the protruding structure protruding from the wall surface of the inner tube wall and the distance from the wall surface of the inner tube wall to the filter screen within the above range, it can not only ensure that the water flow can produce a sufficient number of direction changes, but also enable the water flow to squeeze the filter screen to a greater extent when squeezed, thereby improving the self-cleaning ability of the filter.

[0071] In some embodiments, the protrusion structure 17 is at least one of a pyramidal shape, a conical shape, and a columnar shape;

[0072] Preferably, the protruding structure 17 is in the shape of a quadrangular pyramid.

[0073] The use of a quadrangular pyramid-shaped protrusion structure with an inclined surface protruding from the inner tube wall can make it easier for the water flow to change its flow direction and can also increase the squeezing force on the water flow to a greater extent.

[0074] In some embodiments, the wall of the bypass line 15 away from the filter cavity 14 abuts against the inner wall of the filter cylinder 11; or, the wall of the bypass line 15 away from the filter cavity 14 and the inner wall of the filter cylinder 11 are an integrated structure.

[0075] In some embodiments, as Figure 4 and Figure 6 As shown, the bypass inlet 18 of the bypass pipe 15 and the filter inlet 20 of the filter chamber 14 are respectively connected to the water inlet 12, and a one-way valve is provided at the bypass inlet 18 of the bypass pipe 15;

[0076] Preferably, if Figure 3 and Figure 5 As shown, the one-way valve includes a first baffle 21 located at the bypass inlet 18 and used to block or open the bypass inlet 18;

[0077] One end of the second baffle 22 is fixedly connected to the first baffle 21 via a shaft sleeve 23 , and the other end is extended toward the filter inlet 20 of the filter cavity 14 to partially block the filter inlet 20 .

[0078] In some embodiments, the filter screen 19 is provided with a rotating shaft at one end close to the bypass inlet 18 and the filter inlet 20, and the shaft sleeve 23 is sleeved on the rotating shaft;

[0079] There is an included angle α between the first baffle 21 and the second baffle 22, which satisfies 90°<α<180°;

[0080] Preferably, 120°≤α≤150° is satisfied.

[0081] In the above scheme, if Figure 3 As shown, when water flows along the filter inlet into the filter chamber for filtration, the second baffle is impacted by the water flow, causing the sleeve to flip along the axis, so that the first baffle flips counterclockwise to block the bypass inlet. When the filter is clogged, the impact of the water flow on the second baffle is weakened, and the water pressure forces the first baffle to flip clockwise to automatically open the bypass inlet, and the water flows into the bypass pipe. When the clogging of the filter is improved and filtration can be performed again, the water will flow back to the filter chamber along the filter inlet. When the water flows again into the second baffle, it will drive the first baffle to block the bypass inlet. Refer to Figure 3 and Figure 4The water flow direction indicated by the middle arrow realizes the automatic switching of water flow between the filter chamber and the bypass pipe without affecting the normal operation of the washing machine.

[0082] It is understood that the baffle can be in any shape, such as square, semicircular, elliptical, etc. The shape of the first baffle must match the shape of the bypass inlet to completely block the bypass inlet; the shape of the second baffle is not strictly required, as long as it can partially block the filter inlet.

[0083] In some embodiments, a stopper is provided at a position of the inner pipe wall 16 of the bypass pipe 15 opposite to the filter screen 19 corresponding to the bypass inlet 18 , for limiting the degree of flipping of the first baffle 21 .

[0084] The stopper may be a stop block, a stop sheet, a stop strip or the like.

[0085] When water flows through the filter inlet and into the filter chamber for filtration, the second baffle is impacted by the water flow, causing the sleeve to flip along its axis, causing the first baffle to flip counterclockwise to block the bypass inlet. By providing a stopper on the inner tube wall 16 of the bypass pipe 15 opposite the filter screen 19 at a position corresponding to the bypass inlet 18, the first baffle can be prevented from flipping counterclockwise after blocking the bypass inlet.

[0086] In some embodiments, as Figure 3 and Figure 4 As shown, the filter screen 19 is a cylindrical structure, which is circumferentially arranged along the extension direction of the central axis of the filter cylinder 11 and is connected to the water inlet to form the filter cavity 14.

[0087] It should be noted that the filter cylinder 11 may also be shaped like a cylinder, a cuboid, a prism, or any other shape. The filter screen may be made of a wear-resistant material, such as stainless steel or metal; plastic or other materials may also be used. Of course, the filter screen may be a shaped filter screen 19 or an unshaped (i.e., relaxed) filter screen. When the filter screen is an unshaped filter screen, it may be mounted within the filter cylinder via a frame.

[0088] like Figure 1 and Figure 2 As shown, a washing machine 100 has a self-cleaning filter 10 as described above.

[0089] Furthermore, the washing machine 100 includes a housing 24 , a front panel 25 of the housing 24 is provided with an installation opening 26 , and the self-cleaning filter 10 is detachably installed in the installation opening 26 ;

[0090] Preferably, if Figure 2As shown, a mounting channel 27 is provided in the housing 24 , and the self-cleaning filter 10 is detachably mounted in the mounting channel 27 through the mounting opening 26 ;

[0091] The height of the installation channel 27 closer to the installation opening 26 from the ground is greater than the height of the installation channel 27 farther from the installation opening 26 from the ground.

[0092] In the above solution, by setting the height of the installation channel close to the installation port from the ground to be greater than the height of the installation channel away from the installation port from the ground, when the self-cleaning filter is removed, sewage can be prevented from overflowing outside the washing machine.

[0093] Of course, a corresponding door cover can also be provided at the installation opening on the front panel, and the user can open the door cover to remove the self-cleaning filter to replace the self-cleaning filter. It is understood that the self-cleaning filter can be installed in the installation opening in a vertical manner or in a horizontal manner.

[0094] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make slight changes or modifications to equivalent embodiments using the above technical content without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A self-cleaning filter comprising: A filter cylinder (11) having a water inlet (12) and a water outlet (13); A filter screen (19) is installed in the filter cylinder (11) to form a filter chamber (14) between the water inlet (12) and the water outlet (13) for water to flow through; at least one bypass pipeline (15), disposed in the filter cylinder (11), communicating with the water inlet (12) and the water outlet (13), and used for guiding water flowing in from the water inlet (12) to the water outlet (13); The invention is characterized in that: a filtering water path communicating with the water inlet (12) and the water outlet (13) is provided in the filtering chamber (14); a bypass water path communicating with the water inlet (12) and the water outlet (13) is provided in the bypass pipe (15); and the filtering water path and the bypass water path are arranged in parallel; The bypass pipeline (15) has a pipe wall close to the filter chamber (14) formed by the filter screen (19), and the bypass pipeline (15) has a plurality of protruding structures (17) on its inner pipe wall (16) away from the filter chamber (14); The bypass inlet (18) of the bypass pipeline (15) and the filter inlet (20) of the filter chamber (14) are respectively connected to the water inlet (12). A one-way valve is provided at the bypass inlet (18) of the bypass pipeline (15). When the filter screen is clogged, the one-way valve is opened and water flows into the bypass pipeline. The one-way valve comprises a first baffle (21) located at the bypass inlet (18) and used for blocking or opening the bypass inlet (18); The second baffle (22) has one end fixedly connected to the first baffle (21) via a shaft sleeve (23), and the other end extending toward the filter inlet (20) of the filter cavity (14) to partially block the filter inlet (20).

2. A self-cleaning filter according to claim 1, characterized in that: A plurality of protruding structures (17) are distributed at intervals on the inner tube wall (16).

3. A self-cleaning filter according to claim 2, characterized in that: The distribution density of the protruding structures (17) located downstream of the bypass waterway is greater than the distribution density located upstream of the bypass waterway.

4. A self-cleaning filter according to any one of claims 1 to 3, characterized in that: The height of the protruding structure (17) protruding from the wall surface of the inner tube wall (16) is H, and the distance from the wall surface of the inner tube wall (16) to the filter screen (19) is L, satisfying 0.10L≤H≤0.50L.

5. A self-cleaning filter according to claim 4, characterized in that: 0.25L≤H≤0.35L.

6. A self-cleaning filter according to any one of claims 1 to 3, characterized in that: The protruding structure (17) is at least one of a pyramidal shape, a conical shape, and a columnar shape.

7. A self-cleaning filter according to claim 6, characterized in that: The protruding structure (17) is in the shape of a quadrangular pyramid.

8. A self-cleaning filter according to any one of claims 1 to 3, characterized in that: The wall of the bypass line (15) away from the filter chamber (14) abuts against the inner wall of the filter cylinder (11); Alternatively, the pipe wall of the bypass pipe (15) away from the filter chamber (14) and the inner wall of the filter cylinder (11) are an integrated structure.

9. The self-cleaning filter according to claim 1, characterized in that: The filter screen (19) is provided with a rotating shaft at one end close to the bypass inlet (18) and the filter inlet (20), and the shaft sleeve (23) is sleeved on the rotating shaft; An included angle α is formed between the first baffle (21) and the second baffle (22), satisfying 90°<α<180°.

10. The self-cleaning filter according to claim 9, characterized in that: 120°≤α≤150°。 11. A self-cleaning filter according to claim 1, 9 or 10, characterized in that: The filter screen (19) is a cylindrical structure, circumferentially arranged along the extension direction of the central axis of the filter cylinder (11), and communicates with the water inlet (12) to form the filter cavity (14).

12. A washing machine, characterized in that: A self-cleaning filter according to any one of claims 1 to 11.

13. The washing machine according to claim 12, characterized in that: It comprises a housing (24), a front panel (25) of the housing (24) is provided with a mounting opening (26), and the self-cleaning filter is detachably mounted in the mounting opening (26).

14. The washing machine according to claim 13, characterized in that: A mounting channel (27) is provided in the housing (24), and the self-cleaning filter is detachably mounted in the mounting channel (27) via the mounting opening (26); The height of the side of the installation channel (27) close to the installation opening (26) from the ground is greater than the height of the side of the installation channel (27) away from the installation opening (26) from the ground.

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