CN210934059U - Filter, foreign matter filtering device and washing device - Google Patents

Abstract

The utility model provides a filter for filtering foreign matter in rivers, this filter are suitable for and install in the casing, the filter includes: a first filter structure defining a first filter channel; a second filter structure defining a second filter channel; wherein the first filter channel and the second filter channel point in different directions; the first filtering channel filters foreign matters larger than a first size, the second filtering channel filters foreign matters larger than a second size, and the second size is smaller than the first size. According to the technical scheme, different filtering requirements can be realized by adopting a single filter, the number of parts is reduced, the manufacturing cost is reduced, and the replacement and the maintenance are convenient. The utility model discloses still provide the foreign matter filter equipment including this filter. The utility model discloses still provide the washing device including this foreign matter filter equipment.

Description

Filter, foreign matter filtering device and washing device

Technical Field

The utility model relates to a filter, concretely relates to filter with two kinds of different filtration. In addition, the utility model discloses still relate to foreign matter filter equipment and washing device including this filter.

Background

Washing apparatuses such as washing machines, dishwashers, etc. perform washing operations using water. Generally, before the washed water is discharged by the drain pump, it is necessary to filter out large foreign substances in the water to prevent the foreign substances from damaging the drain pump. In some cases, it is also desirable to redirect the washed water to the washing device to effect recycling of the water. At this time, it is necessary to filter out small foreign matters in the water so as not to clog the circulation water injection device with the foreign matters and to prevent a reduction in washing effect.

Because the requirements of the drainage function and the circulation function for filtering foreign matters are different, in the prior art, two groups of independent foreign matter filtering devices are generally arranged in a washing device and are respectively used for filtering drainage water and circulating water. This case has problems such as a large number of parts, high processing cost, and complicated maintenance; the washing device has overlarge integral size, occupies installation space and has higher transportation cost.

Accordingly, it is desirable to provide a foreign matter filtering apparatus to satisfy the requirements for filtering foreign matter for both the drainage function and the circulation function.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a foreign matter filter equipment to satisfy drainage function and circulation function simultaneously and to the different requirements of filtering the foreign matter, and difficult emergence is blockked up.

In an aspect of the present invention, there is provided a filter for filtering foreign matter in a water flow, the filter being adapted to be installed in a housing, the filter comprising: a first filter structure defining a first filter channel; a second filter structure defining a second filter channel; wherein the first filter channel and the second filter channel point in different directions; the first filtering channel filters foreign matters larger than a first size, the second filtering channel filters foreign matters larger than a second size, and the second size is smaller than the first size.

According to the technical scheme, the single filter can be used for filtering the foreign matters with different sizes in the water flow respectively, the first filtering structure of the filter is used for filtering the foreign matters with larger sizes, and the second filtering structure is used for filtering the foreign matters with smaller sizes, so that different filtering requirements are met. Compare in the situation that adopts a plurality of filters, the utility model discloses a reducible spare part quantity of single filter reduces manufacturing cost, conveniently changes the maintenance.

Optionally, the first filter structure and the second filter structure are axially spaced apart by a distance.

According to this solution, when the water flow is filtered only by the first filter structure, the water flow flows away from the second filter structure, so that foreign objects of smaller size do not block the second filter structure but are discharged through the first filter structure.

Optionally, the peripheral edge of the first filter structure is spaced from the inner wall of the housing to define a portion of the first filter passage.

According to this solution, the first filtering channel is a gap between the peripheral edge of the first filtering structure and the inner wall of the casing, which gap can form a uniform and large-sized filtering channel for filtering large-sized foreign objects, such as coins, buttons, etc. In addition, there is no need to provide filter holes in the first filter structure, which contributes to the structure of the filter structure.

Optionally, the first filter structure has a bottom surface and a top surface opposite to each other, which are connected by a peripheral edge; the top surface has a dome-shaped profile, the bottom surface has a recessed portion, and a reinforcing rib is arranged in the recessed portion.

According to this solution, the top surface of the dome-shaped profile can guide the water flow towards the filter channel at the peripheral edge and, due to its smooth surface, does not catch fine filings in the water flow. The concave part of the bottom surface can reduce the material of the filter and reduce the processing cost. The strengthening rib of bottom surface can strengthen first filtration's intensity, prevents that heavier foreign matter from assaulting and damaging first filtration.

Optionally, the second filter structure has a plurality of filter pores defining the second filter passage.

According to this solution, the second filtering passage is defined by a plurality of filtering holes which are apt to form a uniform and small aperture for filtering foreign bodies of a small size, such as hairs, etc.

Optionally, the peripheral edge of the second filter structure is spaced from the inner wall of the housing to define a third filter passage.

According to this solution, when the filter holes are partially blocked, the water flow can pass along the third filtering channel, bypassing the peripheral edge of the second filtering structure, thus ensuring a greater flow downstream, and thus delaying the blocking of the second filtering structure.

Optionally, the filter holes are rounded towards the upstream edge of the first filter structure, and the downstream edge thereof facing away from the first filter structure is not rounded.

According to the technical scheme, the upstream edge of the filter hole is provided with a relatively smooth surface, which is beneficial to avoiding hanging thread scraps and preventing the thread scraps from being blocked; the downstream edge of the filter hole is provided with a relatively rough surface, which is beneficial to hanging thread scraps and prevents the thread scraps from flowing to the downstream to generate adverse effect. In further embodiments, the upstream side of the peripheral edge of the second filter structure is provided with a radius and the downstream side is not provided with a radius.

Optionally, the filter further comprises a mounting structure, a first bracket and a second bracket; the mounting structure is configured to be mounted to a housing; one end of the first bracket is connected to the central position of the top surface of the first filter structure, and the other opposite end of the first bracket is connected to the central position of the upstream side surface of the second filter structure; one end of the second bracket is connected to a central position of the downstream side of the second filter structure, and the opposite end thereof is connected to a central position of the mounting structure.

Optionally, the filter is symmetrical about a central axis; the first bracket and the second bracket extend along the central axis; the first filter structure, the second filter structure and the mounting structure extend outwardly perpendicular to the central axis.

Optionally, the first bracket has a cross-shaped cross-section, and the peripheral edge of the first bracket is provided with a fillet; and a reinforcing rib is arranged between the first support and the second filtering structure.

Optionally, the second filter structure is disc-shaped having a first diameter; the peripheral edge of the first stent has a second diameter that is less than one third of the first diameter.

According to this technical scheme, when first support arrangement was just when the water inlet, the water inlet was kept away from to the neighboring of first support, can prevent that the foreign matter winding in the influent stream is near first support, ensures that it is unobstructed to intake.

In another aspect of the present invention, there is provided a foreign matter filtering apparatus comprising the filter described above and a housing, the filter being inserted into the housing.

Optionally, the housing has a water inlet, a first water outlet and a second water outlet; the first filtering structure is positioned between the water inlet and the first water outlet and is used for filtering water flow flowing from the water inlet to the first water outlet; the second filtering structure is located between the water inlet and the second water outlet and is used for filtering water flow flowing from the water inlet to the second water outlet.

Optionally, the housing has a cylindrical cavity with a side wall, a bottom and an end opening through which the filter is inserted into the cylindrical cavity; the first water outlet is arranged at the bottom of the cylindrical cavity; the water inlet is arranged on the side wall of the cylindrical cavity; the second water outlet is arranged on the side wall of the cylindrical cavity, the second water outlet and the water inlet are staggered along the axial direction, and the water inlet is positioned between the first water outlet and the second water outlet.

Optionally, the housing is provided with a drain pump cavity at the first water outlet for mounting a drain pump; and the shell is provided with a circulating pump cavity at the second water outlet for installing a circulating pump.

According to the technical scheme, the foreign matter filtering device can be integrated with the drainage pump and the circulating pump, so that the installation and the transportation are convenient.

Optionally, the bottom surface of the first filtering structure faces the first water outlet and is spaced from the first water outlet by a first gap, and the area of the bottom surface of the first filtering structure is larger than that of the first water outlet; the peripheral edge of the first filter structure is spaced from the sidewall by a second gap.

Optionally, the second filter structure has filter holes extending in a direction perpendicular to the direction of extension of the water inlet and perpendicular to the direction of extension of the second water outlet.

According to the technical scheme, the direction of water flow needs to be changed when the water flow enters the filtering holes, so that the filtering effect is improved by being beneficial to the upstream of the filtering holes for intercepting thread scraps; and, because the water flow needs to change direction when leaving the filter holes, the filter helps to hang the filings passing through the filter occasionally on the edge of the filter, and prevents the filings from flowing into the downstream to cause the blockage of the circulating water spray device.

Optionally, the housing has an emergency water outlet disposed on a sidewall of the cylindrical cavity; the emergency water outlet is arranged on one side, deviating from the water inlet, of the second filtering structure.

According to the technical scheme, due to the filtering effect of the second filtering structure, foreign matters in the space of one side of the second filtering structure, which deviates from the water inlet, are few, so that the emergency water outlet can be prevented from being blocked, and smooth drainage under emergency conditions is ensured.

Optionally, the foreign matter filtering device further comprises an end cover capable of being operated by manual rotation; at the end opening of the cylindrical cavity, the filter is liquid-tightly mounted to the housing via the end cap.

Optionally, the foreign substance filtering apparatus further includes a spring disposed between the end cap and the filter and elastically biasing the filter in an axial direction.

In another aspect of the present invention, a washing device is provided, comprising a foreign matter filtering device according to the above, the washing device further comprising a washing container, a drain pump and a circulation pump, wherein, when the drain pump is operated, a flow of water filtered by the first filtering structure exits the washing device; when the circulating pump works, the water flow filtered by the second filtering structure is circulated to the washing container.

Alternatively, the washing device may be a washing machine or a dishwasher.

Drawings

Fig. 1 is a schematic block diagram of a washing apparatus according to the present invention;

fig. 2 is a side view of a foreign matter filtering apparatus according to the present invention;

fig. 3 is a cross-sectional side view of a foreign matter filtering device according to the present invention;

FIG. 4 is an enlarged fragmentary view of the encircled portion of FIG. 3;

FIG. 5 is a cross-sectional end view of a foreign matter filtration device according to the present invention;

figure 6 is a perspective view of a filter according to the present invention;

fig. 7 is a perspective view from another angle of a filter according to the present invention;

fig. 8 is a partially enlarged view of the vicinity of the end cap in fig. 3.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. Components with the same and similar reference numbers in the figures have the same or similar functions.

In the following description, the "axial direction" refers to a direction parallel to the central axis X of the filter; "circumferential direction" refers to a circumferential direction about the central axis X; "radial direction" refers to a direction perpendicular to the central axis X, wherein "outward", "outboard", etc. refer to a direction radially outward away from the central axis, and "inward", "inboard", refer to a direction radially inward toward the central axis. "upstream" and "downstream" are described with respect to the direction of water flow.

Fig. 1 shows a schematic block diagram of a washing device 1 according to the invention. The washing device 1 may be any device for washing articles, such as a washing machine, a dishwasher or the like. The following description will be given taking a washing machine as an example. It is clear to a person skilled in the art that the following description, taking the washing machine 1 as an example, can be applied to other types of washing apparatuses 1 with simple modifications, in combination with the basic knowledge of the field.

The washing machine 1 shown in fig. 1 includes a washing container 2 for receiving laundry to be washed, and is filled with tap water for washing. After the washing operation, the water carrying the contaminants enters the foreign matter filtering device 3. The foreign matter filtering device 3 can filter out foreign matters in the water. As shown in fig. 1, the foreign matter filtering apparatus 3 has two water outlets, a first water outlet on the right side is fluidly connected to the drain pump 4, and a second water outlet on the left side is fluidly connected to the circulation pump 5. According to the programming of the washing machine 1, the drain pump 4 and the circulation pump 5 are operated alternately, but not simultaneously. When the drain pump 4 is operated, the filtered water is discharged from the foreign matter filtering device 3 to the outside of the washing machine 1; when the circulation pump 5 is operated, the filtered water is re-injected from the foreign matter filtering device 3 into the washing container 2, for example, via a shower-type circulation water injection device, thereby achieving the recycling of the water.

Fig. 2 shows a side view of the foreign-matter filter device 3. The foreign substance filter device 3 includes a housing 11. The housing 11 has a generally cylindrical shape extending a length in the axial direction between two ends. The housing 11 has a single water inlet 12 provided in a side wall of the housing 11 at a position substantially in the middle of the length of the housing 11. The drain port 13 is provided at the right side of the water inlet 12 near the right end portion of the housing 11 for draining the water inside the housing 11. A circulation water outlet 14 is provided at the left side of the water inlet 12 near the left end portion of the housing 11 for circulating the water inside the housing 11 to the washing container 1. In addition, an emergency drain port 15 may be further provided on a side wall of the housing 11 to allow emergency drainage to the outside in case of an emergency such as a blockage or an equipment failure. This housing 11 may be integrally formed of metal, plastic, or the like.

Fig. 3 shows a sectional side view of the foreign-matter filter device 3. The housing 11 defines a generally cylindrical internal cavity. A filter 16 is disposed in the interior cavity of the housing 11 for filtering water flow from the inlet 12 to the drain 13 and for filtering water flow from the inlet 12 to the recirculating outlet 14.

A partition 17 is provided near the inner right end of the housing 11, the partition 17 extending in a plane perpendicular to the axial direction, which divides the inner cavity of the housing 11 into a filter chamber on the left side and a drain pump chamber on the right side. The filter chamber is adapted to receive a filter 16 and the drain pump chamber is adapted to receive a drain pump (not shown). A first water outlet 18 is provided at the center of the partition 17. The first outlet port 18 fluidly communicates the filter chamber with the drain pump chamber. When the drain pump is operated, water in the filter chamber is driven to flow to the drain pump chamber via the first water outlet 18 and then discharged to the outside, for example, into a public drain system.

A second water outlet 19 is provided on the side wall of the housing 11, which is located to the left of the water inlet 12. The protruding portion 20 protrudes radially outward from the side wall of the housing 11 around the second water outlet 19, and defines a circulation pump chamber inside thereof for accommodating a circulation pump (not shown). The circulation water outlet 14 described above is opened on the side wall of this projection 20. A second water outlet 19 fluidly connects the filter chamber and the circulation pump chamber. When the circulation pump is operated, the water in the filter chamber is driven to flow to the circulation pump chamber via the second water outlet 19 and then to the circulation water injection device of the downstream washing container 1. As shown in fig. 3, an emergency water outlet 21 communicating with the emergency water outlet 15 is provided in the vicinity of the second water outlet 19.

Fig. 3 also shows a cross-sectional side view of the filter 16. The filter 16 comprises a first filter structure 31 at the right end, a second filter structure 32 at the middle and a mounting structure 33 at the left end, which are spaced apart from each other in the axial direction. A first bracket 34 connects the first filter structure 31 and the second filter structure 32. A second bracket 35 connects the second filter structure 32 and the mounting structure 33. When the filter 16 is mounted in place inside the housing 11, the first filter structure 31 is positioned adjacent the first water outlet 18, the second filter structure 32 is positioned between the water inlet 12 and the second water outlet 19, and the mounting structure 33 is positioned adjacent the mounting aperture 22 of the housing 11 and is mounted to the mounting aperture 22 via the end cap 50.

The first filter structure 31 has a circular truncated cone shape having a bottom surface 311 and a top surface 312 opposite to each other, and the first filter structure 31 has a peripheral edge, referred to as a first filter structure peripheral edge 313, extending in a circumferential direction and connecting the bottom surface 311 and the top surface 312. The bottom surface 311 faces the first outlet 18 and is spaced apart from the first outlet 18 by a first gap D1, D1, of about 3 to 5 mm. The area of the bottom surface 311 is larger than and entirely covers the area of the first water outlet 18 as viewed in the axial direction, whereby the bottom surface 311 and the portion of the shelf 17 define a vertical fluid passage which is wide by the gap D1 and is perpendicular to the axial direction. The top surface 312 has a dome-shaped profile that gradually converges from the first filtration peripheral edge 313 toward the top. The top surface 312 may be a conical surface or may be a partially spherical surface. Thus, the first filter structure 31 tapers in radial width toward the second filter structure 32 and is connected at its top to the first bracket 34.

The first filter peripheral edge 313 and the inner wall of the housing 11 are separated by a second gap D2, D2 may be 3 to 5 mm. The first filter construction peripheral edge 313 defines parallel flow passages with the inner wall of the housing 11 that are wide by the gap D2 and parallel to the axial direction. The parallel flow channels and the vertical flow channels together define a first substantially L-shaped filtration channel a. In this case, when the drain pump is operated, the flow of water from the inlet 11 is driven along the first filtering channel a to the first outlet 18. The second gap D2 allows a small foreign object (e.g., cotton thread, hair, etc.) having a size smaller than its width to enter the drain pump chamber and then to be discharged; and large foreign substances (e.g., coins, buttons, etc.) having a size larger than the width of the second gap D2 are intercepted by the first filter structure 31 and prevented from entering the drain pump chamber, thereby preventing such large foreign substances from interfering with the operation of the drain pump.

Referring to the perspective view of the filter 16 shown in fig. 6, the bottom surface 311 of the first filter structure 31 is provided with a recess 314 for reducing mass; meanwhile, in order to reinforce the structure of the first filter structure 31, an annular bead 315 is provided in the recess 314 of the bottom surface 311.

The second filter structure 32 has a circular plate shape extending radially outwardly from a central axis. Referring to the cross-sectional view of fig. 5, the second filter structure 32 has a circular profile that is concentric with the circular interior cavity of the housing 11. The second filter structure 32 comprises a plurality of filter holes 321, the plurality of filter holes 321 extending in the axial direction and being evenly distributed in a plane perpendicular to the axial direction. The plurality of filtering holes 321 may be arranged along a plurality of concentric circles of different diameters, as shown in fig. 5; or may be arranged along spaced linear rows and columns.

As shown in fig. 3, the second water outlet 19 and the water inlet 12 both open perpendicularly to the axial direction, and are offset from each other in the axial direction without any overlapping portion. The second filter structure 32 is located between the second water outlet 19 and the water inlet 12. In this case, when the circulation pump is operated, the water flow from the water inlet 12 is driven to the second water outlet 19 along the second filtering passage B defined by the plurality of filtering holes 321. The filtering holes 321 have a diameter less than 2.5mm, and can intercept foreign matters having a size greater than the diameter on the right side of the second filtering structure 32. In particular, since the second filtering passage B defined by the filtering holes 321 is perpendicular to the extension direction of the water inlet 12, the flow of water from the water inlet 12 undergoes a substantially 90 turn when passing through the filtering holes 321, and the flow rate is reduced, which helps to intercept lint objects such as hairs and hairs on the right side of the filtering holes 321, thereby preventing the lint objects from flowing back into the washing container 1, or blocking a circulation water injection device (e.g., a shower device) of the washing container 1.

In addition, in order to prevent lint from blocking the filter holes 321, each filter hole 321 is rounded at an upstream edge 322 of a side thereof facing the water inlet 12, as shown in a partially enlarged view of fig. 4. The rounded corners of these upstream edges 322 have a relatively smooth surface to avoid lint becoming caught at the entrance of the filter holes 321, thereby effectively delaying clogging of the second filter structure 32. Meanwhile, the downstream edge 323 of the filter hole 321 on the side away from the water inlet 12 is not chamfered, and has a relatively rough surface. Since the second filtering channel B defined by the filtering aperture 321 is also perpendicular to the extension direction of the second water outlet 19, the water flow passing through the filtering aperture 321 also experiences a substantially 90-degree turn when reaching the second water outlet 19, which helps to hang up lint that occasionally passes through the filtering aperture 321 at the rough downstream edge 323, thereby further preventing such fine lint from flowing back into the washing vessel 1 or clogging the water circulation injection means of the washing vessel 1.

As shown in fig. 3, the second filter structure 32 has a peripheral edge, referred to as the second filter structure peripheral edge 324, that is spaced from the interior of the housing 11 by a third gap D3, D3 being less than 1.5 mm. The third gap D3 may define a third filtered channel C. The third filtering passage C is parallel to the second filtering passage B defined by the filtering holes 321. Similarly, the edge of the peripheral edge 324 of the second filter structure facing the side of the inlet 12 may be rounded to prevent clogging by catching thread crumbs. With the increase of the circulating operation time, foreign matter accumulation exists in the filter holes 321, at the moment, the filter channel is added due to the third gap D3, water flow is allowed to bypass and flow through the third filter channel C, the larger water inflow is maintained, and the spraying effect of downstream circulating water can be maintained; at the same time, the presence of the third gap D3 may further retard the complete clogging of the second filter structure 32.

In addition, the emergency water outlet 21 is arranged on the side of the second filtering structure 32 close to the second water outlet 19. Since the second filtering structure 32 can filter fine thread crumbs, the possibility that the emergency water outlet 21 is blocked is greatly reduced, and reliable drainage in emergency can be realized.

Fig. 6 and 7 show perspective views of the filter 16 from different perspectives. The filter 16 has a symmetrical structure along the central axis X, which makes the mold structure of the filter simple and at the same time facilitates the disassembly and assembly of the filter. In particular, the first bracket 34 and the second bracket 35 each have a substantially cruciform cross section, the cruciform cross sectional shape contributing to a firm support.

Referring to fig. 5 and 6, the first support 34 is sized to be substantially smaller than the diameter of the second filter structure 32, for example, less than one-third thereof. Since the second filter structure 32 is spaced apart from the inner wall of the housing 11 by a small gap, the first bracket 34 is also much smaller in size than the diameter of the inner wall of the housing 11. Thus, the first bracket 34 having a small size is disposed away from the water inlet 12, so that the lint entering from the water inlet 12 can be prevented from being caught on the first bracket 34 facing thereto, thereby facilitating the smooth flow of water through the water inlet 12. In this case, in order to reinforce the connection strength between the first bracket 34 and the second filter structure 32, a reinforcing rib 341 is provided between the first bracket 34 and the second filter structure 32. The ribs 341 also have rounded edges to prevent snagging of thread crumbs.

In the present invention, the first filter structure 31 and the second filter structure 32 need to be stably maintained at predetermined axial and lateral positions during filtering of the water flow to maintain a reliable filtering effect. To this end, the present invention employs an end cap 50 as described below to mount the mounting structure 33 of the filter 16 to the mounting hole 22 of the housing 11.

As shown in fig. 7 and 8, the mounting structure 33 of the filter 16 has an outwardly extending flange surface 331, and a gasket 51 is provided between an inner wall of the flange surface 331 and a step surface of the housing 11. The outer wall of the flange face 331 contacts the inner wall of the end cap 50. The radially outer side of the end cap 50 has external threads 52 and the radially inner side of the mounting hole 22 has internal threads 53. By rotating the handle 54 of the end cap 50, the end cap 50 can be screwed to the mounting hole 22 of the housing 11, so that the pressing washer 51 effects a liquid seal against the inner space of the housing 11 and an axial positioning of the filter 16 is achieved. The gasket 51 has an annular groove 55 on a radially inner wall thereof which engages an annular projection 56 on the mounting structure 33 to locate the filter 16 in a plane perpendicular to the axial direction.

Additionally, a spring 57 may be disposed between the mounting structure 33 and the end cap 50, the spring 57 resiliently biasing the filter 16 inwardly in the axial direction. The spring 57 can improve the reliability of mounting the filter 16. If the threaded connection between the end cap 50 and the housing 11 should become loose for some reason (e.g., manually unthreaded, vibrated, etc.), the end cap 50 may unscrew by an angle that reduces or eliminates the pushing force on the flange surface 331, at which point the spring 57 may continue to compress the gasket 51 due to the biasing action of the spring 57, preventing water leakage due to a failed fluid seal; also, since the spring 57 continues to push the filter 16 inward, the filter 16 can be continuously maintained at a predetermined position, preventing the filter 16 from shaking, and maintaining a reliable filtering effect.

In the present invention, the circulating water and the drain water are filtered separately by means of different filter structures 31, 32 on the single filter 16. The first filter structure 31 has a large filter size to satisfy the filtering requirement of the drain, and it filters large foreign matters that may affect the operation of the downstream drain pump, while allowing smooth discharge of the small foreign matters. The second filtering structure 32 has a smaller filtering size, can meet the filtering requirement of circulating water, can filter fine filings, prevents the filings from flowing back into the washing container to reduce the washing effect, and can prevent the filings from causing adverse effects on the circulating pump and the circulating water injection device. In addition, the first filter structure 31 and the second filter structure 32 are located on the opposite sides of the water inlet 12, when the drainage pump works, water flows towards the first filter structure 31 and away from the second filter structure 32 after entering the water inlet 12, at this time, foreign matter blockage does not occur at the second filter structure 32, and therefore the time that the second filter structure 32 is blocked is effectively delayed.

While certain preferred and other embodiments for carrying out the present invention have been described in detail, it should be understood that these embodiments are presented by way of example only, and are not intended to limit the scope, applicability, or configuration of the invention in any way. The scope of the invention is defined by the appended claims and equivalents thereof. Many variations of the foregoing embodiments may be made by those skilled in the art in light of the teachings of the present disclosure, and such variations are within the scope of the present disclosure.

Reference numerals

1 washing device/washing machine 31 first Filter Structure

2 Top surface of washing vessel 311

3 bottom surface of the foreign matter filtering device 312

4 peripheral edge of first filtering structure of draining pump 313

5 circulating pump 314 recess

11 casing 315 stiffener

12 water inlet 32 second filtering structure

13 water outlet 321 filtering hole

Upstream edge of 14-circulation water gap 322

15 emergency drain 323 downstream edge

16 strainer 324 second filter construction peripheral edge

17 partition 33 mounting structure

18 first water outlet 34 first support

19 second outlet 341 reinforcing rib

20 extension 35 second bracket

21 emergency water outlet 50 end cover

22 mounting hole 51 gasket

X center axis 52 external threads

A first filtering channel 53 internal thread

B second Filter channel 54 handle

C third Filter channel 55 annular groove

D1 first gap 56 annular projection

D2 second gap 57 spring

D3 third gap.

Claims (22)

1. A filter for filtering foreign bodies in a water flow, characterised in that the filter (16) is adapted to be mounted in a housing (11), the filter (16) comprising:

a first filtering structure (31) defining a first filtering channel (A);

a second filtering structure (32) defining a second filtering channel (B);

wherein the first filter channel (a) and the second filter channel (B) point in different directions;

wherein the first filtering channel (A) filters foreign bodies larger than a first size, the second filtering channel (B) filters foreign bodies larger than a second size, and the second size is smaller than the first size.

2. The filter of claim 1,

the first filter structure (31) and the second filter structure (32) are axially spaced apart by a distance.

3. The filter according to claim 1 or 2,

the first filter structure (31) has a first filter structure peripheral edge (313) spaced from an inner wall of the housing (11) to define a portion of the first filter passage (a).

4. The filter of claim 3,

the first filtering structure (31) has a bottom face (311) and a top face (312) opposite each other, connected by a first filtering structure peripheral edge (313);

the top surface (312) has a dome-shaped profile, the bottom surface (311) has a recess (314), and a rib (315) is disposed in the recess (314).

5. The filter according to claim 1 or 2,

the second filter structure (32) has a plurality of filter holes (321), the plurality of filter holes (321) defining the second filter passage (B).

6. The filter of claim 5,

the second filter structure (32) has a second filter structure peripheral edge (324) spaced from the inner wall of the housing (11) to define a third filter channel (C).

7. The filter of claim 5,

the upstream edge (322) of the filter openings (321) facing the first filter structure (31) is rounded, and the downstream edge (323) thereof facing away from the first filter structure (31) is not rounded.

8. The filter according to claim 1 or 2,

the filter (16) further comprising a mounting structure (33), a first bracket (34) and a second bracket (35);

the mounting structure (33) is configured to be mounted to a housing (11);

one end of the first bracket (34) is connected to the central position of the top surface (312) of the first filter structure (31), and the other opposite end is connected to the central position of the upstream side surface of the second filter structure (32);

one end of the second bracket (35) is connected to a central position of the downstream side of the second filter structure (32), and the opposite end thereof is connected to a central position of the mounting structure (33).

9. The filter of claim 8,

the filter (16) is symmetrical about a central axis (X);

a first bracket (34) and a second bracket (35) extend along the central axis (X);

the first filter structure (31), the second filter structure (32) and the mounting structure (33) extend outwardly perpendicular to the central axis (X).

10. The filter of claim 9,

the first bracket (34) has a cross-shaped cross section, and the peripheral edge of the first bracket is provided with a fillet;

a reinforcing rib (341) is arranged between the first bracket (34) and the second filter structure (32).

11. The filter of claim 9,

the second filter structure (32) is disc-shaped having a first diameter;

the peripheral edge of the first support (34) has a second diameter that is less than one third of the first diameter.

12. A foreign matter filtering device, comprising a filter (16) according to any one of claims 1 to 11 and a housing (11), the filter (16) being inserted into the housing (11).

13. The foreign matter filtering device according to claim 12,

the shell (11) is provided with a water inlet (12), a first water outlet (18) and a second water outlet (19);

the first filtering structure (31) is positioned between the water inlet (12) and the first water outlet (18) and is used for filtering water flow flowing from the water inlet to the first water outlet;

the second filter structure (32) is located between the inlet (12) and the second outlet (19) for filtering the flow of water from the inlet to the second outlet.

14. The foreign matter filtering device according to claim 13,

the housing (11) having a cylindrical cavity with a side wall, a bottom and an end opening, the filter (16) being inserted into the cylindrical cavity via the end opening;

the first water outlet (18) is arranged at the bottom of the cylindrical cavity;

the water inlet (12) is arranged on the side wall of the cylindrical cavity;

the second water outlet (19) is arranged on the side wall of the cylindrical cavity, the second water outlet (19) and the water inlet (12) are staggered along the axial direction, and the water inlet (12) is positioned between the first water outlet (18) and the second water outlet (19).

15. The foreign matter filtering device according to claim 14,

the housing (11) is provided with a drain pump cavity at the first water outlet (18) for mounting a drain pump; the shell (11) is provided with a circulating pump cavity at the second water outlet (19) for installing a circulating pump.

16. The foreign matter filtering device according to claim 14,

the bottom surface (311) of the first filtering structure (31) is opposite to the first water outlet (18) and is separated from the first water outlet by a first gap (D1), and the area of the bottom surface of the first filtering structure is larger than that of the first water outlet;

the first filter structure peripheral edge is spaced apart from the sidewall by a second gap (D2).

17. The foreign matter filtering device according to claim 14,

the second filter structure (32) has filter holes (321), the extension direction of the filter holes (321) is perpendicular to the extension direction of the water inlet (12) and perpendicular to the extension direction of the second water outlet (19).

18. The foreign matter filtering device according to claim 17,

the shell (11) is provided with an emergency water outlet (21) which is arranged on the side wall of the cylindrical cavity;

the emergency water outlet (21) is arranged on one side of the second filtering structure (32) which is far away from the water inlet (12).

19. The foreign matter filtering device according to claim 14,

the foreign matter filtering device (3) further comprises an end cover (50) which can be operated by manual rotation;

at the end opening of the cylindrical cavity, the filter (16) is mounted liquid-tightly to the housing (11) via the end cap (50).

20. The foreign matter filtering device according to claim 19,

the foreign matter filtering device (3) further includes a spring (57) that is provided between the end cap (50) and the filter (16), and elastically biases the filter (16) in the axial direction.

21. A washing device, characterized in that it comprises a foreign matter filtering device (3) according to any one of claims 12-20, the washing device (1) further comprising a washing container (2), a drain pump (4) and a circulation pump (5), wherein, when the drain pump (4) is active, the flow of water filtered through the first filtering structure (31) exits the washing device (1); when the circulating pump (5) is operated, the water flow filtered by the second filtering structure (32) is circulated to the washing container (2).

22. A washing device according to claim 21, which is a washing machine or a dishwasher.

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