A filter basket structure and a sink and cleaning machine using the same

Abstract

The present application relates to a kind of filter basket structure and the sink and cleaning machine of application of this filter basket structure, including the filter basket with filter hole, still including above-mentioned filter basket as center along the annular spray arm that surrounds in the four around of filter basket, the inside hollow of this spray arm and form annular water flow chamber, and the water inlet that is communicated with above-mentioned water flow chamber is opened in this spray arm, and the inner side wall of spray arm is spaced apart and is set with the water outlet towards above-mentioned filter basket along the circumference direction.The water flow of each water outlet in the present application can be along the circumferential 360 ° spray washing to filter basket, under the impact of water flow, the dirt adhered on filter basket is quickly stripped, wherein, small particle dirt is stripped and flows into sewer along with water flow, and large particle dirt is deposited in filter basket bottom, just need to pour filter basket after cleaning.Compared with manual cleaning mode, the present application realizes the automatic cleaning of filter basket, easy to operate and good cleaning effect.

Description

Technical Field

[0001] This invention relates to the field of cleaning machines, and more particularly to a filter basket structure and a water tank and cleaning machine using the filter basket structure. Background Technology

[0002] The sink is the central cleaning area in the kitchen and is used frequently. To prevent clogging of the drain, a filter structure is usually installed under the sink. For example, Chinese utility model patent ZL202220484469.7 (authorization announcement number CN217267852U) discloses a sink that includes a sink body with a drain outlet on the bottom wall. The bottom of the sink body has a drainage cavity extending downwards along the edge of the drain outlet. The shell forming the drainage cavity is integrally formed with the sink body. A filter basket is housed in the drainage cavity, and a drain pipe is detachably connected below the drainage cavity. For example, Chinese invention patent "A Cleaning Machine" with patent number ZL202010898826.X (authorization announcement number CN112137461B) and Chinese invention patent "A Cleaning Basket and a Water Tank Using the Cleaning Basket" with patent number ZL202010898739.4 (authorization announcement number CN112089376B), etc.

[0003] However, filter baskets typically use a mesh structure, and after prolonged use, the mesh is easily clogged by dirt and grime, affecting both the filtration efficiency and the user experience. Furthermore, the dirt (such as kitchen waste) adhering to the filter basket is difficult to clean, and manual cleaning is ineffective. Summary of the Invention

[0004] The first technical problem to be solved by the present invention is to provide a filter basket structure that can be automatically cleaned, in contrast to the prior art.

[0005] The second technical problem to be solved by the present invention is to provide a filter basket structure that can automatically clean and has a good cleaning effect, in contrast to the prior art.

[0006] The third technical problem to be solved by the present invention is to provide a filter basket structure that can automatically clean and achieve comprehensive cleaning, in contrast to the prior art.

[0007] The fourth technical problem to be solved by the present invention is to provide a water tank with the above-mentioned filter basket structure in contrast to the prior art.

[0008] The fifth technical problem to be solved by the present invention is to provide a cleaning machine that uses the above-mentioned water tank, in contrast to the prior art.

[0009] The technical solution adopted by the present invention to solve at least one of the above-mentioned technical problems is as follows: a filter basket structure, including a filter basket with filter holes, characterized in that it further includes an annular spray arm surrounding the filter basket with the filter basket as the center, the spray arm is hollow to form an annular water flow chamber, and the spray arm is provided with a water inlet communicating with the water flow chamber, and the inner side wall of the spray arm is provided with water spray nozzles circumferentially spaced towards the filter basket.

[0010] Furthermore, it also includes a basin-shaped inner liner with a drain outlet on its bottom wall. The upper opening of the inner liner is circumferentially connected to the drain outlet of the water tank to form a drain cavity. The filter basket is housed in this drain cavity. The spray arm extends vertically in cross-section, and its inner sidewall is circumferentially attached to the sidewall of the inner liner. The sidewall of the inner liner has circumferentially spaced through holes corresponding to the spray outlets, each through hole being fluidly connected to its corresponding spray outlet. This design facilitates the stable installation of the inner liner and spray arm, and the water jets from the spray outlets clean the inner surface of the inner liner while simultaneously washing the filter basket wall, preventing residual dirt and enabling comprehensive cleaning of the filter basket structure.

[0011] Furthermore, the edges of each spray nozzle extend horizontally outward in the circumferential direction to form spray guide sleeves, and each spray guide sleeve passes through a corresponding through hole and is exposed in the inner cavity of the inner tank, all located outside the filter basket. The spray guide sleeves not only allow the water flow from each spray nozzle to pass more effectively through the through holes and be sprayed onto the filter basket, but also enable mutual positioning between the inner tank and the spray arm, facilitating the installation of the spray arm.

[0012] Furthermore, each of the aforementioned spray nozzles includes a first spray hole and a second spray hole. Correspondingly, each of the aforementioned spray guide sleeves includes a first spray guide sleeve corresponding to the first spray hole and a second spray guide sleeve corresponding to the second spray hole. The cross-section of the inner cavity of the first spray guide sleeve is circular, and the size of the cross-section increases from the inside to the outside, thereby increasing the spray range of the water flow. The cross-section of the inner cavity of the second spray guide sleeve is also circular, and its end is closed. Spray holes are spaced circumferentially on the side wall, thereby changing the spray direction of the water flow and increasing the water flow velocity, which is beneficial for achieving targeted cleaning of heavily soiled areas.

[0013] Furthermore, each spray hole on the second water spray guide sleeve is arranged along the left-right direction of the second water spray guide sleeve, and the cross-section of each spray hole is fan-shaped. In the cross-section of the inner cavity of each second water spray guide sleeve, the included angle between adjacent spray holes is twice the central angle of the channel of each spray hole. In this way, the water flow sprayed from each spray hole can rinse the filter basket laterally, and the rinsed water flows from top to bottom along the side wall of the filter basket to further rinse the dirt attached to the filter basket. Moreover, while ensuring the spray range of each spray hole, it can avoid mutual interference between adjacent spray holes.

[0014] Furthermore, the second spray holes of each spray nozzle are circumferentially spaced at the upper part of the inner liner, while the first spray holes of each spray nozzle are circumferentially spaced at the middle part of the inner liner. The first and second spray holes of each spray nozzle are vertically aligned. Each through-hole is an elongated hole extending along the height of the inner liner, and the first and second spray guide sleeves of each spray guide sleeve are located in their respective through-holes. In this way, the water jets from the first spray holes of each spray nozzle can wash most of the filter basket wall, while the water jets from the second spray holes horizontally wash the upper part of the filter basket sidewall. The water flow in the upper part of the filter basket flows downwards, working in conjunction with the water jets from the second spray holes to thoroughly wash the filter basket.

[0015] Furthermore, the free ends of each of the first water spray guide sleeves are located outside the respective spray holes of the corresponding second water spray guide sleeve relative to the inner liner. This helps to avoid mutual obstruction between the water flow from the first spray hole and the water flow from the second spray hole, and the water flow from the first spray hole collides with the second water spray guide sleeve and then changes direction to accelerate and assist the water flow from the second spray holes on both sides of the second water spray guide sleeve, thereby improving the spraying effect of the second spray hole.

[0016] Furthermore, the free edge of each of the first water spray guide sleeves is vertically aligned with the outer edge of the corresponding spray hole of the second water spray guide sleeve relative to the inner liner. This allows the water flow from the first spray hole in each spray nozzle to better accelerate and assist the water flow from the second spray hole, thereby improving the spraying effect of the spray nozzle.

[0017] Furthermore, the cross-section of the spray arm is reduced at each spray nozzle. This increases the water pressure at each spray nozzle in the water flow chamber and increases the water flow rate at each spray nozzle, which is beneficial for improving the cleaning effect.

[0018] Furthermore, the cross-sectional size of the spray arm at each of the spray nozzles is 3 / 4 of the cross-sectional size of the other parts of the spray arm. This increases the water pressure at each spray nozzle in the water flow chamber while ensuring smooth circumferential flow of water within the chamber.

[0019] Furthermore, the spray arm is shaped like a vertically extending cylinder, with the outer wall of the spray arm at each spray nozzle concave inward along its height and becoming straight. The number of spray nozzles is denoted as N, and the central angle corresponding to the outer wall of the spray arm at each nozzle is 360° / 2N. This design ensures that the water pressure at each spray nozzle is uniformly increased relative to other parts of the flow chamber, and also better guarantees smooth water flow within the flow chamber.

[0020] Furthermore, it also includes a basin-shaped shell that covers the inner liner from bottom to top. The upper opening of the shell is connected to the opening of the inner liner, and the bottom wall has a drain outlet that is fluidly connected to the drain inlet. The spray arm is housed in the shell, and the bottom wall of the spray arm has third spray holes spaced circumferentially and communicating with the water flow chamber. In this way, the water jets through each third spray hole can wash the outer surface of the inner liner and the inner surface of the shell, and the washed-off dirt flows into the sewer through the drain outlet.

[0021] Furthermore, the sidewalls and bottom wall of the housing are connected circumferentially by a smoothly extending boundary wall from top to bottom, and each third water spray hole is respectively aligned with the inner surface of the boundary wall. In this way, the inner surface of the housing can be better rinsed under the guidance of the inner surface of the boundary wall.

[0022] Furthermore, the channels of each of the third water spray holes extend vertically, and the edges of each third water spray hole extend vertically downward to form a third water spray guide sleeve, with the cross-sectional size of each third water spray guide sleeve increasing from top to bottom. The water flow from the third water spray holes is guided by the third water spray guide sleeve, increasing the spray area of ​​the third water spray holes, thereby improving the cleaning effect on the outer surface of the inner tank and the inner surface of the shell.

[0023] The technical solution adopted to further solve the fourth technical problem mentioned above is: a water tank, characterized in that it applies a filter basket structure as described above.

[0024] The technical solution adopted to further solve the fifth technical problem mentioned above is: a cleaning machine, characterized in that it uses a water tank as described above.

[0025] Compared with the prior art, the advantages of this invention are as follows: The filter basket is surrounded by spray arms, each spray arm having a hollow interior forming an annular water flow chamber. The spray arms have inlets communicating with the water flow chamber, and the inner walls of the spray arms are spaced circumferentially with spray nozzles facing the filter basket. This allows the water jets from each nozzle to perform a 360° circumferential cleaning of the filter basket. Under the impact of the water flow, the dirt adhering to the filter basket is quickly detached. Small particles of dirt are carried by the water flow into the sewer, while larger particles are deposited at the bottom of the filter basket. Simply empty the filter basket after cleaning. Compared with manual cleaning, this invention achieves automatic cleaning of the filter basket, which is convenient to operate and provides excellent cleaning results. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the water tank structure in an embodiment of the present invention;

[0027] Figure 2 This is a cross-sectional view of the water tank in an embodiment of the present invention;

[0028] Figure 3 for Figure 2 Enlarged view of section A;

[0029] Figure 4 This is a cross-sectional view of the filter basket structure in an embodiment of the present invention;

[0030] Figure 5 This is an exploded view of the filter basket structure in an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the spray arm structure in an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the inner liner structure in an embodiment of the present invention;

[0033] Figure 8 for Figure 7 A structural diagram from another direction;

[0034] Figure 9 for Figure 7 A structural diagram in another direction;

[0035] Figure 10 for Figure 8 A cross-sectional view along the BB direction;

[0036] Figure 11 for Figure 9 A sectional view along the CC direction;

[0037] Figure 12 for Figure 9 A cross-sectional view along the DD direction. Detailed Implementation

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0039] In the description of this invention, 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," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this invention can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0040] like Figures 1-3 The image shows a water tank 1 in this embodiment. This water tank 1 can be used in a cleaning machine, such as a water tank cleaning machine. A drain outlet 10 is provided on the bottom wall of the water tank 1, and a detachable cover 7 for opening or closing the drain outlet 10 is installed in the drain outlet 10. It also includes, for example,... Figures 4-12 The filter basket structure 2 shown is included. This filter basket structure 2 includes a filter basket 21 with filter holes 210, and an annular spray arm 3 surrounding the filter basket 21. The spray arm 3 is hollow, forming an annular water flow chamber 30, and has an inlet 31 communicating with the water flow chamber 30. Water nozzles 32 are spaced circumferentially on the inner wall of the spray arm 3, facing the filter basket 21. An inlet pipe 311 is connected to the inlet 31, which is connected to municipal tap water, and the water pressure at the inlet 31 is 0.2–0.5 MPa.

[0041] As can be seen from the above, the filter basket 21 of the present invention is surrounded by spray arms 3. The spray arms 3 are hollow inside to form an annular water flow chamber 30, and the spray arms 3 have water inlets 31 communicating with the water flow chamber 30. The inner sidewall of the spray arms 3 has water nozzles 32 spaced circumferentially towards the filter basket 21. In this way, the water jet from each water nozzle 32 can spray the filter basket 21 360° circumferentially (the drain outlet 10 of the water tank 1 is closed with the cover 7 during cleaning). Under the impact of the water flow, the dirt attached to the filter basket 21 is quickly peeled off. Among them, the peeled small particles of dirt flow into the sewer with the water flow, while the large particles of dirt (larger than the pore diameter of the filter holes 210) are deposited at the bottom of the filter basket 21. The filter basket 21 can be emptied after cleaning. Compared with the manual cleaning method, the present invention realizes automatic cleaning of the filter basket 21, which is convenient to operate and has a good cleaning effect.

[0042] Furthermore, such as Figures 3-5 As shown, the filter basket structure 2 also includes a basin-shaped inner liner 4, with a drain outlet 42 on its bottom wall. The upper opening of the inner liner 4 is circumferentially connected to the drain outlet 10 of the water tank 1 to form a drain cavity 40, and a first sealing ring 61 is circumferentially sandwiched between the openings of the two. The filter basket 21 is housed in the drain cavity 40. The cross-section of the spray arm 3 extends vertically, and the inner sidewall of the spray arm 3 is circumferentially attached to the sidewall of the inner liner 4. Furthermore, the sidewall of the inner liner 4 is circumferentially spaced with through holes 41 corresponding to the spray outlets 32, and each through hole 41 is in fluid communication with the corresponding spray outlet 32. On the one hand, it helps to achieve a stable setting of the inner tank 4 and the spray arm 3. On the other hand, the water jet from the spray nozzle 32 can clean the inner surface of the inner tank 4 while spraying and washing the filter basket 21, avoiding the residue of dirt on the inner surface of the inner tank 4, and facilitating a comprehensive cleaning of the filter basket structure 2.

[0043] Preferably, the edges of each of the aforementioned spray nozzles 32 extend horizontally outward in the circumferential direction to form spray guide sleeves, and each spray guide sleeve passes through the corresponding through hole 41 and is exposed in the inner cavity of the inner liner 4, and is located outside the aforementioned filter basket 21. The spray guide sleeves not only allow the water flow from each spray nozzle 32 to be sprayed more effectively through each through hole 41 onto the filter basket 21, but also enable mutual positioning between the inner liner 4 and the spray arm 3, facilitating the installation of the spray arm 3. Specifically, each of the aforementioned water nozzles 32 includes a first water nozzle 321 and a second water nozzle 322. Correspondingly, each of the aforementioned water spray guide sleeves includes a first water spray guide sleeve 33 corresponding to the first water nozzle 321 and a second water spray guide sleeve 34 corresponding to the second water nozzle 322. The cross-section of the inner cavity of the first water spray guide sleeve 33 is circular, and the cross-sectional size increases from the inside to the outside, thereby increasing the spray range of the water flow. The cross-section of the inner cavity of the second water spray guide sleeve 34 is also circular, and its end is closed. Spray holes 341 are spaced circumferentially on the sidewall, thereby changing the spray direction of the water flow and increasing the water flow velocity, which is beneficial for achieving targeted cleaning of dirt. In this embodiment, the included angle between the two sides of the axial section of the first water spray guide sleeve 33 is 90°, thereby maximizing the spray range of each first water nozzle 321.

[0044] Furthermore, such as Figure 12 As shown, each spray hole 341 on the aforementioned second water spray guide sleeve 34 is arranged along the left-right direction of the second water spray guide sleeve 34, and the cross-section of the channel of each spray hole 341 is fan-shaped. In the cross-section of each second water spray guide sleeve 34, the included angle between adjacent spray holes 341 is twice the central angle of the channel of each spray hole 341. In this way, the water flow sprayed from each spray hole 341 can rinse the filter basket 21 in the transverse direction, and the rinsed water flow along the side wall of the filter basket 21 from top to bottom to further rinse the dirt attached to the filter basket 21. Furthermore, while ensuring the spray range of each spray hole 341, mutual interference between adjacent spray holes 341 can be avoided. In this embodiment, preferably, the central angle of the channel of each water spray hole is 60°. Figure 12 As shown.

[0045] Furthermore, the second spray holes 322 of each of the aforementioned spray nozzles 32 are circumferentially spaced at the upper part of the inner liner 4, while the first spray holes 321 of each spray nozzle 32 are circumferentially spaced at the middle part of the inner liner 4. The first spray holes 321 and second spray holes 322 of each spray nozzle 32 are vertically aligned. Each through hole 41 is an elongated hole extending along the height direction of the inner liner 4, and the first spray guide sleeve 33 and second spray guide sleeve 34 of each spray guide sleeve are located in their respective through holes 41. In this way, the water jets from the first spray holes 321 of each spray nozzle 32 can wash most of the filter basket wall 21, while the water jets from the second spray holes 322 horizontally wash the upper part of the side wall of the filter basket 21. The water flow in the upper part of the filter basket 21 flows downwards, cooperating with the water jets from the second spray holes 322 to thoroughly wash the filter basket 21.

[0046] Preferably, such as Figure 11 As shown, the free ends of the aforementioned first water spray guide sleeves 33 are respectively located outside the respective spray holes 341 of the corresponding second water spray guide sleeves 34 relative to the inner liner 4. This helps to avoid mutual obstruction between the water flow sprayed from the first water spray hole 321 and the water flow sprayed from the second water spray hole 322, and the portion of the water flow sprayed from the first water spray hole 321, after colliding with the second water spray guide sleeve 34, is redirected to accelerate and assist the water flow sprayed from the second water spray holes 322 on both sides of the second water spray guide sleeve 34, thereby improving the spraying effect of the second water spray holes 322. More preferably, the edge of the free end of each of the aforementioned first water spray guide sleeves 33 is vertically aligned with the outer edge of the respective spray hole 341 of the corresponding second water spray guide sleeve 34 relative to the inner liner 4. This allows the water flow sprayed from the first water spray hole 321 in each spray nozzle 32 to better accelerate and assist the water flow sprayed from the second water spray hole 322, thereby improving the spraying effect of the spray nozzle 32.

[0047] Furthermore, such as Figure 10 As shown, the cross-section of the spray arm 3 narrows at each spray nozzle 32, thereby increasing the water pressure at each spray nozzle 32 in the water flow chamber 30 and increasing the water flow velocity at each spray nozzle 32, which is beneficial to improving the cleaning effect. Preferably, the cross-sectional size of the spray arm 3 at each of the above-mentioned spray nozzles 32 is 3 / 4 of the cross-sectional size of the other parts of the spray arm 3. In this way, while increasing the water pressure at each spray nozzle 32 in the water flow chamber 30, it can also ensure that the water flows smoothly in the circumferential direction in the water flow chamber 30.

[0048] Furthermore, such as Figure 6 , Figure 9 as well as Figure 10As shown, the spray arm 3 is a vertically extending cylindrical shape. The outer wall of the spray arm 3 at each spray nozzle 32 is concave inward along the height direction and is straight. The number of spray nozzles 32 is denoted as N, and the central angle corresponding to the outer wall of the spray arm 3 at each spray nozzle 32 is 360° / 2N. This design ensures that the water pressure at each spray nozzle 32 is uniformly increased relative to other parts of the water flow chamber 30, and also better ensures smooth water flow within the water flow chamber 30. In this embodiment, N = 8, meaning there are 8 spray nozzles 32. Specifically, there are 8 first spray holes 321 and 8 second spray holes 322. This design of the central angle corresponding to the outer wall of the spray arm 3 at each spray nozzle 32, combined with the central angle of each spray hole 341 and the flared design of each first spray guide sleeve 33, allows the water to be sprayed at a certain pressure and angle, which is beneficial for improving the cleaning effect.

[0049] Furthermore, such as Figures 3-5 As shown, the filter basket structure 2 also includes a basin-shaped shell 5, which covers the inner liner 4 from bottom to top. The upper opening of the shell 5 is connected to the opening of the inner liner 4, and a second sealing ring 62 is circumferentially sandwiched between the edges of the two. A drain outlet 51, which is in fluid communication with the drain outlet 42, is opened on the bottom wall. The spray arm 3 is housed in the shell 5, and third spray holes 35, which are circumferentially spaced on the bottom wall of the spray arm 3 and communicate with the water flow chamber 30, are provided. In this way, the water flow sprayed through each third spray hole 35 can rinse the outer surface of the inner liner 4 and the inner surface of the shell 5. The dirt washed off flows into the sewer through the drain outlet 51 with the water flow, which is beneficial to achieve a more thorough cleaning of the filter basket structure 2.

[0050] Preferably, such as Figure 4 As shown, the sidewalls and bottom wall of the aforementioned housing 5 are connected circumferentially by a smoothly extending boundary wall from top to bottom, and each of the third water spray holes 35 is respectively aligned with the inner surface of the boundary wall. In this way, the inner surface of the housing 5 can be better rinsed under the guidance of the inner surface of the boundary wall.

[0051] Furthermore, such as Figure 4 As shown, the channels of each of the aforementioned third water spray holes 35 extend vertically, and the edges of each third water spray hole 35 extend vertically downward to form a third water spray guide sleeve 351. The cross-sectional size of each third water spray guide sleeve 351 increases from top to bottom. The third water spray guide sleeve 351 guides the water flow sprayed from the third water spray holes 35, increasing the spray area of ​​the third water spray holes 35, thereby improving the cleaning effect on the outer surface of the inner tank 4 and the inner surface of the shell 5. In this embodiment, the included angle between the two sides of the axial section of the aforementioned third water spray guide sleeve 351 is 90°, thereby maximizing the spray range of each third water spray hole 35.

[0052] Furthermore, in this embodiment, the water inlet 31 is located on the outer wall of the spray arm 3, and the edge of the water inlet 31 extends horizontally outward in the circumferential direction to form a water inlet connector 310. The water inlet pipe 311 is connected to the water inlet connector 310, and the side wall of the housing 5 is provided with an installation port 51 for the water inlet connector 310 to pass through. Figure 4 and Figure 5 As shown. The number of the aforementioned third water spray holes 35 is four, evenly spaced circumferentially. Furthermore, the aforementioned water inlet 31, one of the water spray holes 32, and the third water spray holes 35 are located at the same position in the water flow chamber 30, as shown. Figure 10 As shown.

[0053] The term "fluid connectivity" as used in this invention refers to the spatial relationship between two components or parts (hereinafter referred to as the first part and the second part, respectively), that is, a fluid (gas, liquid, or a mixture of both) can flow from the first part along a flow path and / or be transported to the second part. This can be a direct connection between the first part and the second part, or an indirect connection between the first part and the second part through at least one third party. This third party can be a fluid channel such as a pipe, channel, conduit, guide, hole, or groove, or a chamber that allows fluid to flow through, or a combination of the above.

Claims

1. A filter basket structure comprising a filter basket (21) having filter holes (210), characterized in that, It also includes an annular spray arm (3) surrounding the filter basket (21) as the center. The spray arm (3) is hollow inside to form an annular water flow chamber (30). The spray arm (3) has an inlet (31) communicating with the water flow chamber (30). The inner sidewall of the spray arm (3) has spray nozzles (32) spaced circumferentially towards the filter basket (21).

2. The filter basket structure as described in claim 1, characterized in that, It also includes a basin-shaped inner liner (4), on the bottom wall of which a drain outlet (42) is provided. The upper opening of the inner liner (4) is connected circumferentially to the drain outlet (10) of the water tank (1) to form a drain cavity (40). The filter basket (21) is housed in the drain cavity (40). The cross-section of the spray arm (3) extends vertically, and the inner sidewall of the spray arm (3) is attached to the sidewall of the inner liner (4) circumferentially. Furthermore, the sidewall of the inner liner (4) is provided with through holes (41) that correspond one-to-one with the spray outlets (32) at intervals along the circumferential direction. Each through hole (41) is in fluid communication with the corresponding spray outlet (32).

3. The filter basket structure as described in claim 2, characterized in that, Each of the spray nozzles (32) extends horizontally outward along the circumferential direction to form a spray guide sleeve, and each spray guide sleeve passes through the corresponding through hole (41) and is exposed in the inner cavity of the inner liner (4), and is located outside the filter basket (21).

4. The filter basket structure as described in claim 3, characterized in that, Each of the aforementioned spray nozzles (32) includes a first spray hole (321) and a second spray hole (322). Correspondingly, each of the aforementioned spray guide sleeves includes a first spray guide sleeve (33) corresponding to the first spray hole (321) and a second spray guide sleeve (34) corresponding to the second spray hole (322). The first water spray guide sleeve (33) has a circular cross-section in its inner cavity, and the size of the cross-section increases from the inside to the outside. The second water spray guide sleeve (34) also has a circular cross-section in its inner cavity, and its end is closed. Spray holes (341) are provided on the side wall at circumferential intervals.

5. The filter basket structure as described in claim 4, characterized in that, The cross-section of each of the spray holes (341) is fan-shaped, and the included angle between adjacent spray holes (341) in the cross-section of the inner cavity of each second water spray guide sleeve (34) is twice the central angle of the channel of each spray hole (341).

6. The filter basket structure as described in claim 4 or 5, characterized in that, The second spray holes (322) of each spray nozzle (32) are all spaced apart in the circumferential direction at the upper part of the inner liner (4), while the first spray holes (321) of each spray nozzle (32) are all spaced apart in the circumferential direction at the middle part of the inner liner (4), and the first spray holes (321) and the second spray holes (322) of each spray nozzle (32) are directly opposite each other. Each through hole (41) is a long strip hole extending along the height direction of the inner liner (4), and the first spray guide sleeve (33) and the second spray guide sleeve (34) of each spray guide sleeve are respectively located in the corresponding through hole (41).

7. The filter basket structure as described in claim 6, characterized in that, The free ends of each of the first water spray guide sleeves (33) are located outside the respective spray holes (341) of the corresponding second water spray guide sleeves (34) relative to the inner liner (4).

8. The filter basket structure as described in claim 7, characterized in that, The free edge of each of the first water spray guide sleeves (33) is aligned vertically with the outer edge of the corresponding spray hole (341) of the second water spray guide sleeve (34) relative to the inner liner (4).

9. The filter basket structure according to any one of claims 1 to 5, characterized in that, The cross-section of the spray arm (3) decreases at each spray nozzle (32).

10. The filter basket structure as described in claim 9, characterized in that, The cross-sectional size of the spray arm (3) at each of the spray nozzles (32) is 3 / 4 of the cross-sectional size of the other parts of the spray arm (3).

11. The filter basket structure as described in claim 10, characterized in that, The spray arm (3) has a vertically extending cylindrical shape. The outer side wall of the spray arm (3) where each spray nozzle (32) is located is concave inward along the height direction and is straight. The number of spray nozzles (32) is denoted as N. The central angle corresponding to the outer side wall of the spray arm (3) where each spray nozzle (32) is located is 360° / 2N.

12. The filter basket structure according to any one of claims 2 to 5, characterized in that, It also includes a basin-shaped shell (5), which covers the inner liner (4) from bottom to top. The upper opening of the shell (5) is connected to the opening of the inner liner (4), and a drain (51) is provided on the bottom wall, which is in fluid communication with the drain (42). The spray arm (3) is housed in the shell (5), and a third spray hole (35) communicating with the water flow chamber (30) is provided on the bottom wall of the spray arm (3) along the circumferential direction.

13. The filter basket structure as described in claim 12, characterized in that, The sidewall and bottom wall of the housing (5) are connected circumferentially by a junction wall that extends smoothly from top to bottom, and each third water spray hole (35) is respectively opposite to the inner surface of the junction wall.

14. The filter basket structure as described in claim 13, characterized in that, The channels of each of the third water spray holes (35) extend vertically, and the edges of each of the third water spray holes (35) extend vertically downward to form a third water spray guide sleeve (351). The cross-sectional size of each third water spray guide sleeve (351) increases from top to bottom.

15. A water tank, characterized in that, The application has a filter basket structure as described in any one of claims 1 to 14.

16. A cleaning machine, characterized in that, The application includes the water tank as described in claim 15.

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