CN220184176U - Drainage strainer and sink - Google Patents

Abstract

The utility model relates to the technical field of drainage and discloses a drainage filter and a water tank, wherein the drainage filter comprises a lifting cage, the lifting cage comprises a bottom wall and a side wall which is arranged around the circumference of the bottom wall, one end of the side wall, which is far away from the bottom wall, forms an open end, slag filtering holes are formed in the bottom wall and the side wall, namely, water flow mixed with sundries can enter the lifting cage through the open end, sundries in the water flow can be filtered out through the slag filtering holes, namely, the sundries are left in the lifting cage, and the water flow filtered out of the sundries by the lifting cage can be discharged. The side wall is also provided with an inward-protruding flow guiding part, the flow guiding part is used for enabling water flow passing through the lifting cage to form vortex, sundries can be concentrated to the drainage filter by utilizing the suction force of the vortex, and finally the sundries are brought to the bottom wall of the lifting cage, so that the sundries are prevented from being attached to the slag filtering holes of the side wall, and the water filtering speed of the lifting cage is prevented from being influenced.

Description

Drainage strainer and sink

Technical Field

The utility model relates to the technical field of drainage, in particular to a drainage strainer and a water tank.

Background

Drainage strainers are commonly used in cabinet appliances or other aspects, such as a water tank which is necessary in a home, and a drainage strainers are required to be installed at a drainage outlet so as to filter sundries and drain sewage. The existing drainage filter relies on holes arranged on the wall surface of the lifting cage to filter and drain, if the holes are large, the filtering effect cannot be achieved, and if the holes are small, the drainage speed is difficult to meet the living demands. The filtering holes are very easy to be blocked by finely crushed sundries, so that the drainage efficiency is reduced, and users are required to manually clean the filtering holes, so that the user experience is affected.

Therefore, there is a need for a drain strainer and sink that solves the above-mentioned problems.

Disclosure of Invention

The utility model aims to provide a drainage filter which can reduce the influence of sundries on the drainage rate, ensure smooth drainage of a water tank and improve the user experience.

The technical scheme adopted by the utility model is as follows:

a drain strainer, comprising:

carry the cage, carry the cage including the diapire with enclose to locate diapire circumference's lateral wall, the lateral wall is kept away from the one end of diapire forms open end, the diapire with all be provided with the filter residue hole on the lateral wall, still have inwards bellied water conservancy diversion portion on the lateral wall, water conservancy diversion portion is used for making the process open end gets into carry the rivers of cage and forms the vortex.

Optionally, the guiding part is provided with a plurality of, and a plurality of guiding parts are arranged from the open end to the bottom wall in a same-direction inclined mode or in a spiral mode.

Optionally, the slag filtering hole is formed in the flow guiding part.

Optionally, the bottom wall and the side wall are both provided with a plurality of slag filtering holes, the flow area of a single slag filtering hole on the bottom wall is S1, and the flow area of a single slag filtering hole on the side wall is S2, wherein S1 is greater than S2.

Optionally, the drain strainer further comprises a housing, the lifting cage is placed in the housing, and the housing can be fixed to a drain outlet of the sink and is communicated with an external drain pipeline.

Optionally, the shell comprises an inner shell and an outer shell, the outer shell comprises a cavity with one open end and a connecting section communicated with the cavity, the connecting section can be communicated with the drainage pipeline, and the inner shell is arranged in the cavity and is in sealing connection with the open end of the cavity.

Optionally, the side wall of carrying the cage is provided with the blank holder in the outside extension, the inner wall of interior casing is provided with spacing platform, carry the cage to be located in the interior casing, the blank holder supports and presses spacing platform.

Optionally, an inward flanging is arranged on the side wall of the lifting cage in an inward extending manner.

Optionally, the drainage strainer further comprises a water sealing cover, and the water sealing cover can be arranged at the open end of the lifting cage in a covering mode.

Another object of the present utility model is to provide a water tank, in which the residue filtering holes are not easily blocked by impurities, and the water draining speed is high.

The technical scheme adopted by the utility model is as follows:

the water tank comprises the water draining strainer, wherein the water draining strainer is positioned at a water draining port of the water tank, the water draining port is positioned at the lowest point of the bottom of the water tank, the bottom is provided with N bottom edges, the bottom is provided with N inclined surfaces, and the lowest point of the bottom is a collection point of the N inclined surfaces.

Optionally, the cell body of basin is rectangular structure, the inclined plane has 4,4 the inclined plane butt one side of base with the minimum distance of meeting point is L1, L2, L3 and L4 respectively, 4 the inclined plane is A1, A2, A3 and A4 respectively with the contained angle of horizontal plane, satisfies:

if l1=l3=l2=l4, 1 ° -a1=a3=a2=a4-10 °;

if l1=l3 > l2=l4, a1=a3 < a2=a4, and a1 is 1 and 5, a2 is 3 and 10;

if l1=l3, L2 > L4, a1=a3, A2 < A4, and a1° is greater than or equal to 1 ° and less than or equal to 5 °, and a2° is greater than or equal to 3 ° and less than or equal to 10 °;

if L1 > L3, l2=l4, a1 < A3, a2=a4, and a1 is 1-5 °, a2 is 3-10 °;

if L1 is more than L3 and L2 is more than L4, A1 is less than A3, A2 is less than A4, A1 is more than or equal to 1 degree and less than or equal to 5 degrees, and A2 is more than or equal to 3 degrees and less than or equal to 10 degrees.

The beneficial effects of the utility model are as follows:

the drainage filter comprises a lifting cage, wherein the lifting cage comprises a bottom wall and a side wall which is arranged around the circumference of the bottom wall, one end of the side wall, which is far away from the bottom wall, forms an open end, slag filtering holes are formed in the bottom wall and the side wall, water flow mixed with impurities can enter the lifting cage through the open end, impurities in the water flow can be filtered out through the slag filtering holes, namely the impurities are left in the lifting cage, and the water flow filtered out of the impurities by the lifting cage can be discharged. In addition, the side wall is also provided with an inward-protruding flow guiding part, the flow guiding part is used for enabling water flow passing through the lifting cage to form vortex, sundries can be concentrated to the drainage filter by utilizing the suction force of the vortex, and finally the sundries are brought to the bottom wall of the lifting cage, so that the sundries are prevented from being attached to the slag filtering holes of the side wall, and the water filtering speed of the lifting cage is prevented from being influenced.

The water tank provided by the utility model comprises the water draining filter, the water draining filter is arranged at the water outlet of the water tank, the bottom of the water tank is provided with N bottom edges, namely N inclined surfaces, the lowest point of the bottom is the collecting point of the N inclined surfaces, and the water outlet is arranged at the lowest point of the bottom of the water tank, so that the flowing speed of water flow can be further increased, and the accumulated water in the water tank is completely discharged.

Drawings

FIG. 1 is an exploded view of a drain filter provided in an embodiment of the present utility model;

fig. 2 is a schematic structural view of a first view angle of a lifting cage according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a second view of a lifting cage according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a third view of a lifting cage according to an embodiment of the present utility model (without inner flanging);

FIG. 5 is a schematic view of a water tank (without a water cover) according to an embodiment of the present utility model;

FIG. 6 is a schematic view of a water tank (with a water sealing cover) according to an embodiment of the present utility model;

fig. 7 is a schematic structural diagram of a first view angle of a tank according to an embodiment of the present utility model;

FIG. 8 is a schematic diagram of a structure of a second view of a tank according to an embodiment of the present utility model;

FIG. 9 is a schematic view of a structure of a third view of a tank according to an embodiment of the present utility model;

fig. 10 is a schematic structural diagram of a fourth view angle of a tank according to an embodiment of the present utility model;

FIG. 11 is a schematic view of another embodiment of a structure of a tank according to a first view angle;

FIG. 12 is a schematic view of a structure of another tank according to a second view angle of the present utility model;

FIG. 13 is a schematic view of a third view of another tank according to an embodiment of the present utility model;

fig. 14 is a schematic structural diagram of another fourth view angle of a tank according to an embodiment of the present utility model.

In the figure:

1. lifting a cage; 10. an open end; 11. a bottom wall; 12. a sidewall; 121. a flow guiding protrusion; 13. a slag filtering hole; 14. edge pressing; 15. an inner flanging;

2. an inner housing; 21. a flanging; 22. a limiting table;

3. a seal ring;

4. an outer housing; 41. a chamber; 42. a connection section;

5. a water sealing cover;

100. a drain strainer; 200. a tank body; 201. a bottom; 2011. an inclined surface; 2012. a bottom edge; 202. and a water outlet.

Detailed Description

In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the utility model more clear, the technical scheme of the utility model is further described below by a specific embodiment in combination with the attached drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the drawings related to the present utility model are shown.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

As shown in fig. 1 to 4, this embodiment provides a drainage filter 100, including carrying the cage 1, carry the cage 1 and include diapire 11 and enclose and locate diapire 11 circumference lateral wall 12, lateral wall 12 keeps away from diapire 11's one end and forms open end 10, the rivers that mix with debris accessible open end 10 get into and carry the cage 1, and all be provided with on diapire 11 and the lateral wall 12 and strain the cinder hole 13, the debris in the rivers can be filtered to the cinder hole 13, namely debris remains in carrying the cage 1, the rivers of being carried the cage 1 and filtering the debris can be discharged, the debris in carrying the cage 1 can be cleared up by the manual work, in order to guarantee the clean of basin. In order to prevent impurities from adhering to the residue filtering holes 13 of the side wall 12 and affecting the water filtering speed of the lifting cage 1, the side wall 12 is also provided with an inward-protruding flow guiding part 121, and the flow guiding part 121 is used for enabling water flow passing through the lifting cage 1 to form vortex so as to guide the water flow to form vortex in the water tank, and impurities can be concentrated to the water draining filter 100 by utilizing the suction force of the vortex, and finally the impurities are brought to the bottom wall 11 of the lifting cage 1, so that the water draining smoothness of the water tank can be ensured.

Specifically, the flow guide portion 121 is disposed obliquely or spirally from the open end 10 to the bottom wall 11. The guide parts 121 are provided in plurality, each guide part 121 is obliquely or spirally arranged, and the oblique or spiral directions of the guide parts 121 are consistent so as to change the direction of downward flowing water flow, so that the water flow is transversely deviated, a vortex is formed, and sundries cannot stay and accumulate on the side wall 12. In this embodiment, the flow guiding portion 121 is formed by punching the side wall 12 of the lifting cage 1 inward to form a plurality of torsion slopes in the inner cavity of the lifting cage 1. Preferably, the flow guiding part 121 has an inclined triangular cone structure.

In addition, the flow guiding part 121 is taken as a part of the bulge on the side wall 12, and is also provided with slag filtering holes 13, and the area of the side wall 12 is further increased by the bulge curved surface structure, so that more slag filtering holes 13 can be conveniently distributed, the flow area of water flow is increased, and the water filtering speed of the lifting cage 1 is improved.

Optionally, a plurality of slag holes 13 are formed in the bottom wall 11 and the side wall 12, the flow area of the single slag hole 13 in the bottom wall 11 is S1, the flow area of the single slag hole 13 in the side wall 12 is S2, and S1 > S2, so that the water filtering speed of the bottom 201 is higher than that of the side wall 12, water flow is easier to concentrate towards the bottom wall 11 during water filtering, sundries are easier to be brought to the bottom wall 11 of the lifting cage 1, and the possibility that the slag hole 13 of the side wall 12 is blocked is further reduced. In this embodiment, the upper slag filtering holes 13 of the bottom wall 11 and the side wall 12 are circular holes, the diameter of the slag filtering holes 13 of the bottom wall 11 is phi 1, and the diameter of the slag filtering holes 13 of the side wall 12 is phi 2, then phi 1 > phi 2. In other embodiments, the residue filtering holes 13 of the bottom wall 11 and the residue filtering holes 13 of the side wall 12 may be formed in other shapes, such as oval, square, diamond, etc.

The drain strainer 100 provided in this embodiment further includes a housing in which the lifting basket 1 is placed, and the housing is fixed to the drain port 202 of the sink and communicates with an external drain line. I.e. when the water flow mixed with impurities enters the lifting basket 1 through the open end 10, the impurities are left in the lifting basket 1, and the water flow can pass through the slag filtering holes 13, i.e. the water flow will pass through the lifting basket 1 and then flow to the drainage pipeline through the shell, and finally the water flow is discharged.

Optionally, the housing includes an inner housing 2 and an outer housing 4, the outer housing 4 includes a cavity 41 with an opening at one end and a connection section 42 communicating with the cavity 41, the inner housing 2 is disposed in the cavity 41, the inner housing 2 is used for abutting against the lifting cage 1 to assemble the housing with the lifting cage 1, and the connection section 42 of the outer housing 4 can extend out of the drain port 202 of the sink to communicate with an external drain pipeline to assemble the housing with the sink. In this embodiment, the inner wall of the outer casing 4 is provided with an internal thread, and the outer wall of the inner casing 2 is provided with an external thread, so that the outer casing 4 can be firstly arranged at the water outlet 202 and connected with a water drainage pipeline during assembly, and then the inner casing 2 is arranged in the outer casing 4, and the inner casing 2 is rotated to realize threaded connection. The threaded connection is a detachable connection, i.e. the inner housing 2 and the outer housing 4 can be detached again later when maintenance is required.

Further, the sealing ring 3 is further clamped between the opening ends of the chambers 41 of the inner shell 2 and the outer shell 4, and the sealing ring 3 is arranged to enable the inner shell 2 to be in sealing connection with the opening ends of the chambers 41, so that water is prevented from flowing between the inner shell 2 and the outer shell 4, and water cannot flow to the drainage pipeline through the connecting section 42 of the outer shell 4. In particular, the open end of the chamber 41 is provided with an outward edge which abuts against the bottom 201 of the water tank, while the side of the inner housing 2 close to the open end is also provided with a turned-out edge 21, the turned-out edge 21 abuts against the edge of the open end, and the sealing ring 3 is clamped between the turned-out edge 21 and the edge.

Preferably, the side wall 12 of the lifting cage 1 is provided with a pressing edge 14 extending outwards, and the inner wall of the inner shell 2 is correspondingly provided with a limiting table 22, so that when the lifting cage 1 is placed in the inner shell 2, the pressing edge 14 of the lifting cage 1 is pressed against the limiting table 22 of the inner shell 2, and the lifting cage 1 is placed stably.

Preferably, the side walls 12 of the lifting cage 1 are also provided with inward turned edges 15, which inward turned edges 15 can be held when the user needs to lift the lifting cage 1 out of the housing.

Further, the drain strainer 100 provided in this embodiment further includes a water sealing cover 5, where the water sealing cover 5 can be covered on the open end 10 of the carrying case 1, so that the interior of the water tank can be kept clean, and the odor generated by impurities left in the carrying case 1 can be at least partially shielded.

As shown in fig. 5 to 14, the present embodiment also provides a sink including the drain strainer 100 described above. The drain strainer 100 is installed at the drain port 202 of the sink, the bottom 201 of the sink is provided with an inclined surface 2011, and the drain port 202 is provided at the lowest point of the bottom 201 of the sink, thereby increasing the flow rate of water flow and facilitating the total drainage of accumulated water in the sink. Specifically, the bottom 201 of the water tank has N bottom edges 2012, and the bottom 201 has N inclined surfaces 2011, and the lowest point of the bottom 201 is the collection point of the N inclined surfaces 2011. Referring to fig. 7 and 12, when the bottom 201 of the water tank has 4 bottom sides 2012, 4 inclined surfaces 2011,4 inclined surfaces 2011 may be provided on the bottom 201 to form 1 collection point on the bottom 201,4 inclined surfaces 2011 of the water tank, and the drain port 202 may be provided at the collection point. In other embodiments, if the sink has 3 bottom edges 2012, the bottom 201 may be provided with 3 inclined surfaces 2011.

It can be seen that, since one side of the plurality of inclined surfaces 2011 abutting against the bottom edge 2012 of the bottom 201 is located on the same horizontal plane, the plurality of inclined surfaces 2011 of the bottom 201 of the same water tank may have different angles with the horizontal plane due to the difference of the minimum distance between the side and the collecting point, and the angles between the N inclined surfaces 2011 and the horizontal plane are A1, A2 … An, respectively. And in order to be convenient for the bottom 201 of basin put the thing steady, the drainage of ponding simultaneously is convenient for, the inclined plane 2011 of bottom 201 of basin has certain value scope with the contained angle of horizontal plane.

Further, the structure of the two kinds of water tanks provided in this embodiment will be described in detail. The structure of the water tank is as follows: the tank body 200 of the water tank has a rectangular structure, and 4 inclined surfaces 2011 are provided, and projections of the 4 inclined surfaces 2011 on a horizontal plane where the tank body 200 is located are rectangular. The other water tank has the structure that: the tank body 200 of the water tank has a rectangular structure, and 4 inclined surfaces 2011 are provided, and projections of the 4 inclined surfaces 2011 on a horizontal plane where the tank body 200 is located are all trapezoidal.

As shown in fig. 7 to 10, in the first water tank structure, the tank body 200 of the water tank has a rectangular structure, the inclined surfaces 2011 have 4 inclined surfaces 2011, the minimum distances between one side of the 4 inclined surfaces 2011, which are abutted against the bottom 201, and the collecting point are L1, L2, L3 and L4, respectively, and the included angles between the 4 inclined surfaces 2011 and the horizontal plane are A1, A2, A3 and A4, respectively, which divide the bottom 201 into 4 inclined surfaces 2011 with identical shapes, that is, l1=l3 > l2=l4, and 1 degree is less than or equal to a1=a3 is less than or equal to 5 degrees, and 3 degree is less than or equal to a2=a4 is less than or equal to 10 degrees. As can be seen from the mathematical basic knowledge, as the minimum distance between the side of the inclined surface 2011 abutting against the bottom 201 and the collection point is smaller, the angle between the inclined surface 2011 and the horizontal plane is larger.

The bottom 201 of the tank 200 in fig. 7 to 10 has at least two equal minimum distances because it is divided into 4 shapes having a uniform structure and area. However, in other embodiments, if the lengths of the four bottom edges 2012 of the rectangular-shaped tank 200 are identical, the minimum distances L1, L2, L3, and L4 between the sides of the 4 inclined surfaces 2011 abutting the bottom 201 and the collection point will all be equal, and the angles A1, A2, A3, and A4 between the 4 inclined surfaces 2011 and the horizontal plane will also all be equal, that is, when l1=l3=l2=l4, 1+.a1=a3=a2=a4+.10°.

By changing the position of the drain port 202 located at the bottom 201 of the tank body 200, the shape of the 4 inclined surfaces 2011 provided at the bottom 201 of the tank body 200, and the relationship between the minimum distances L1, L2, L3, and L4 of the sides of the 4 inclined surfaces 2011 abutting the bottom 201 and the collection point will be changed. As shown in fig. 11 to 14, in the second water tank structure, the tank body 200 of the water tank has a rectangular structure, and the inclined surfaces 2011 have 4 inclined surfaces 2011, but the shape and the area of the 4 inclined surfaces 2011 are not uniform, and the relationship between the minimum distances L1, L2, L3 and L4 between one side of the 4 inclined surfaces 2011 abutting against the bottom 201 and the collection point is L1 > L3, L2 > L4, and the relationship between the included angles A1, A2, A3 and A4 between the 4 inclined surfaces 2011 and the horizontal plane is A1 < A3, A2 < A4.

Based on the structure of the tank body 200, the included angles between the inclined surfaces 2011 and the horizontal plane defined in this embodiment are combined, that is, the included angles between the two inclined surfaces 2011 and the horizontal plane along the long side of the tank body 200 are respectively A2 and A4, the included angles between the two inclined surfaces 2011 and the horizontal plane along the short side of the tank body 200 are respectively A1 and A3, and the included angles between the two inclined surfaces 2011 and the horizontal plane along the long side of the tank body 200 are respectively A1 and A3, and the included angles between the two inclined surfaces are respectively A1 and A1 are respectively less than or equal to 5.

It is understood that, in either the first type of water tank structure or the second type of water tank structure, there are cases where the minimum distance L between one side of the inclined surface 2011 and the collection point of the bottom 201 is equal to L1 and L3, and the minimum distances L2 and L4 between one side of the inclined surface 2011 and the collection point of the bottom 201 are equal to each other, measured along the longitudinal direction of the tank 200, are measured along the width direction of the tank 200. The relationship may be that L1=L3, L2 > L4, A1=A3, A2 < A4, and A1 is more than or equal to 1 and less than or equal to 5, A2 is more than or equal to 3 and less than or equal to 10. Or the relationship may be L1 > L3, L2=L4, then A1 < A3, A2=A4, and 1 DEG A1 DEG C.ltoreq.5 DEG, 3 DEG C.ltoreq.A2 DEG C.ltoreq.10 deg.

The relationship between the minimum distances L1, L2, L3, and L4 between the side of the plurality of inclined surfaces 2011 abutting the bottom 201 and the collection point is not affected by the shape of the inclined surface 2011, and is only related to the installation position of the drain port 202. The inclined surfaces 2011 of the two water tank structures are different in shape, but the relationship between the smallest distances L1, L2, L3 and L4 between the side of the inclined surface 2011 abutting against the bottom 201 and the collection point is common, and the separate description is only for convenience of showing two different structures of the water tank at the same time.

The above embodiments merely illustrate the basic principle and features of the present utility model, and the present utility model is not limited to the above embodiments, but may be varied and altered without departing from the spirit and scope of the present utility model. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (11)

1. A drain filter, comprising:

carry cage (1), carry cage (1) include diapire (11) and enclose locate diapire (11) circumferential lateral wall (12), lateral wall (12) keep away from the one end of diapire (11) forms open end (10), diapire (11) with all be provided with filter residue hole (13) on lateral wall (12), inwards bellied water conservancy diversion portion (121) still have on lateral wall (12), water conservancy diversion portion (121) are used for making the process open end (10) get into carry the rivers of cage (1) and form the vortex.

2. The drain strainer according to claim 1, wherein a plurality of the flow guide portions (121) are provided, and a plurality of the flow guide portions (121) are disposed obliquely or spirally in the same direction from the open end (10) to the bottom wall (11).

3. The drain strainer according to claim 1, wherein the flow guide portion (121) is provided with the residue filtering holes (13).

4. A drain strainer according to any one of claims 1 to 3, wherein a plurality of said filter residue holes (13) are provided in each of said bottom wall (11) and said side wall (12), and wherein the flow area of a single said filter residue hole (13) in said bottom wall (11) is S1, and the flow area of a single said filter residue hole (13) in said side wall (12) is S2, S1 > S2.

5. The drain strainer according to claim 1, wherein the drain strainer (100) further comprises a housing, wherein the lifting cage (1) is placed inside the housing, wherein the housing is fixable to a drain opening (202) of a sink and communicates with an external drain line.

6. The drain strainer according to claim 5, wherein the housing comprises an inner housing (2) and an outer housing (4), the outer housing (4) comprising a chamber (41) open at one end and a connection section (42) communicating with the chamber (41), the connection section (42) being communicable with the drain line, the inner housing (2) being placed in the chamber (41) and being sealingly connected with the open end of the chamber (41).

7. The drainage strainer according to claim 6, wherein a pressing edge (14) is arranged on the side wall (12) of the lifting cage (1) in an outward extending mode, a limiting table (22) is arranged on the inner wall of the inner shell (2), the lifting cage (1) is located in the inner shell (2), and the pressing edge (14) abuts against the limiting table (22).

8. -the drainage strainer according to claim 1, characterized in that said lateral wall (12) of said lifting cage (1) is provided with an inward flange (15) extending inwards.

9. The drain strainer according to claim 1, wherein the drain strainer (100) further comprises a water sealing cover (5), the water sealing cover (5) being capable of being provided to the open end (10) of the carrying cage (1).

10. A sink comprising the drain strainer (100) of any one of claims 1-9, the drain strainer (100) being located at a drain opening (202) of the sink, the drain opening (202) being located at a lowest point of a bottom (201) of the sink, the bottom (201) having N bottom edges (2012), the bottom (201) having N inclined surfaces (2011), the lowest point of the bottom (201) being a collection point of the N inclined surfaces (2011).

11. The sink according to claim 10, characterized in that the sink body (200) of the sink is of rectangular structure, the inclined surfaces (2011) have 4, the minimum distances between one side of the 4 inclined surfaces (2011) abutting the bottom side (2012) and the collection point are L1, L2, L3 and L4, respectively, and the included angles between the 4 inclined surfaces (2011) and the horizontal plane are A1, A2, A3 and A4, respectively, so that:

if l1=l3=l2=l4, 1 ° -a1=a3=a2=a4-10 °;

if l1=l3 > l2=l4, a1=a3 < a2=a4, and a1 is 1 and 5, a2 is 3 and 10;

if l1=l3, L2 > L4, a1=a3, A2 < A4, and a1° is greater than or equal to 1 ° and less than or equal to 5 °, and a2° is greater than or equal to 3 ° and less than or equal to 10 °;

if L1 > L3, l2=l4, a1 < A3, a2=a4, and a1 is 1-5 °, a2 is 3-10 °;

if L1 is more than L3 and L2 is more than L4, A1 is less than A3, A2 is less than A4, A1 is more than or equal to 1 degree and less than or equal to 5 degrees, and A2 is more than or equal to 3 degrees and less than or equal to 10 degrees.