Filtration systems and household appliances

Abstract

The present invention discloses a filtering system and a household appliance. The household appliance includes a water storage part, and the filtering system includes a cylindrical filtering component, a coarse filtering assembly and a connecting piece. The cylindrical filtering component is rotatably arranged in the water storage part. The coarse filtering assembly is arranged on the cylindrical filtering component, and the coarse filtering assembly includes a lifting cup and a planar filtering component. The connecting piece includes a first sub-connecting piece and a second sub-connecting piece, the first sub-connecting piece and the second sub-connecting piece are coaxially arranged and relatively rotatably connected, one of the first sub-connecting piece and the second sub-connecting piece is connected to the cylindrical filtering component, and the other of the first sub-connecting piece and the second sub-connecting piece is connected to the lifting cup or the planar filtering component. In this way, the residue in the cylindrical filtering component can be prevented from leaking out from the installation gap between the cylindrical filtering component and the coarse filtering assembly, and the residue can also be prevented from being stuck in the installation gap and affecting the rotational movement of the cylindrical filtering component.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a filtering system and a household appliance. Background Art

[0002] At present, the washing water of the dishwasher is usually injected into the spray arm through the washing pump for spraying. The setting position of the washing pump is fixed and unchanged. During the washing process of the dishwasher, the filter screen is also fixed. Therefore, the main utilization area of ​​the filter screen is concentrated in the area near the suction port of the washing pump, while the filter screen area far from the suction port cannot be fully utilized. In addition, the washing pump draws water from a fixed place, which will cause more and more residues on the filter screen to accumulate, which will directly affect the water pumping volume of the washing pump, and then affect the water pressure of the spray arm, thereby reducing the cleaning effect of the dishwasher.

[0003] In the related art, the problem of low filter area utilization is solved by providing a rotatable cylindrical filter under the flat filter. However, since the cylindrical filter needs to rotate, it is extremely important to control the installation gap between the cylindrical filter and the flat filter above it. If the gap is too large, the residue inside the cylindrical filter will easily flow into the washing pump through the gap. If the gap is too small, the residue will easily get stuck and cause the cylindrical filter to stop. Therefore, it is necessary to solve the residue leakage problem while ensuring the efficient rotation of the cylindrical filter. Summary of the invention

[0004] The invention provides a filtering system and a household appliance.

[0005] The filtering system according to the embodiment of the present invention is used for a household appliance, wherein the household appliance includes a water storage part, and the filtering system includes:

[0006] A cylindrical filter component, wherein the cylindrical filter component is rotatably disposed in the water storage portion;

[0007] A coarse filter assembly, the coarse filter assembly is arranged on the cylindrical filter component, and the coarse filter assembly includes a cup and a plane filter component;

[0008] A connecting member, wherein the cylindrical filter component is rotatably connected to the coarse filter component through the connecting member, the connecting member includes a first sub-connector and a second sub-connector, the first sub-connector and the second sub-connector are coaxially arranged and relatively rotatably connected, one of the first sub-connector and the second sub-connector is connected to the cylindrical filter component, and the other of the first sub-connector and the second sub-connector is connected to the lifting cup or the plane filter component.

[0009] In the filtering system of the above-mentioned embodiment, the cylindrical filter component and the coarse filter assembly are rotatably connected by a coaxially arranged first sub-connector and a second sub-connector. This can prevent the residue in the cylindrical filter component from leaking out of the installation gap between the cylindrical filter component and the coarse filter assembly without affecting the rotation of the cylindrical filter component. It can also prevent the residue from getting stuck in the installation gap between the cylindrical filter component and the coarse filter assembly and affecting the rotational movement of the cylindrical filter component. In this way, the problem of residue leakage can be solved while ensuring the efficient rotation of the cylindrical filter component.

[0010] In certain embodiments, the connecting member includes a bearing, the first sub-connecting member is an outer ring of the bearing, and the second sub-connecting member is an inner ring of the bearing.

[0011] In certain embodiments, the bearing includes a cage and a rolling element disposed between the outer ring and the inner ring, wherein the cage is used to maintain the position of the rolling element.

[0012] In some embodiments, the lifting cup is at least partially disposed within the cylindrical filter component, and one of the first sub-connector and the second sub-connector is connected to the lifting cup.

[0013] In some embodiments, the lifting cup includes an annular portion extending into the cylindrical filter component, the first sub-connector is fixedly connected to the cylindrical filter component, and the second sub-connector is connected to the annular portion.

[0014] In some embodiments, the second sub-connector is detachably connected to the annular portion.

[0015] In some embodiments, the planar filter component is disposed above the cylindrical filter component, and one of the first sub-connector and the second sub-connector is connected to the planar filter component.

[0016] In some embodiments, the first sub-connector is fixedly connected to the cylindrical filter component, and the second sub-connector is detachably connected to the planar filter component.

[0017] In some embodiments, the cylindrical filter component includes an upper ring portion, a lower ring portion and vertical ribs, the upper ring portion and the lower ring portion are spaced apart, the vertical ribs connect the upper ring portion and the lower ring portion, and one of the first sub-connector and the second sub-connector is fixedly connected to the upper ring portion.

[0018] In some embodiments, the connecting member includes a snap ring, which includes a first snap ring and a second snap ring that are snap-fitted and rotatable with each other, the first sub-connecting member is the first snap ring, and the second sub-connecting member is the second snap ring.

[0019] The household appliance according to the embodiment of the present invention comprises a water storage part and the filtering system described in any one of the above embodiments, and the filtering system is connected to the water storage part.

[0020] In the above-mentioned household appliance, the cylindrical filter component and the coarse filter assembly are rotatably connected by a coaxially arranged first sub-connector and a second sub-connector, which can prevent the residue in the cylindrical filter component from leaking out from the installation gap between the cylindrical filter component and the coarse filter assembly without affecting the rotation of the cylindrical filter component, and can also prevent the residue from being stuck in the installation gap between the cylindrical filter component and the coarse filter assembly and affecting the rotational movement of the cylindrical filter component. In this way, the problem of residue leakage can be solved while ensuring the efficient rotation of the cylindrical filter component.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 is a schematic structural diagram of a household appliance according to an embodiment of the present invention;

[0024] Figure 2 is a three-dimensional exploded schematic diagram of a filtration system according to an embodiment of the present invention;

[0025] Figure 3 is a cross-sectional schematic diagram of a filtration system according to an embodiment of the present invention;

[0026] Figure 4 yes Figure 3 An enlarged schematic diagram of location V in the filtration system.

[0027] Description of main component symbols:

[0028] Household appliance 1000, filtering system 100, cylindrical filtering component 10, upper ring portion 12, lower ring portion 13, vertical ribs 14, connecting ribs 15, fins 16, coarse filtering assembly 40, planar filtering component 41, through hole 411, supporting platform 412, lifting cup 42, supporting ring ribs 421, annular portion 422, connector 50, first sub-connector 51, second sub-connector 52, water storage portion 200. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the examples of various specific processes and materials provided by the present invention, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0034] See also Figure 1 and Figure 2 The household appliance 1000 of the embodiment of the present invention comprises a filter system 100 and a water storage part 200, the water storage part 200 is formed with an upward opening, and the filter system 100 is arranged at the opening. The household appliance 1000 of the embodiment of the present invention includes but is not limited to water-using appliances such as dishwashers, water dispensers, and water purifiers. In one example, the household appliance 1000 is a dishwasher, and the water storage part 200 can be a water collection cup or a water cup of the dishwasher. When the household appliance 1000 is other water-using appliances such as a water purifier, the water storage part 200 can be a component for storing water, such as a water tank, a water box, etc.

[0035] See also Figure 1 , taking the household appliance 1000 as a dishwasher as an example, generally, the dishwasher comprises an inner tank 300, a water storage portion 200 (i.e., a water collection cup) and a washing pump. Generally, a washing chamber 301 is formed inside the inner tank 300 (see Figure 1 ), a shelf (not shown) for placing dishes and other items to be washed may be provided in the washing chamber 301, and a spray arm assembly (not shown) for spraying washing water on the items to be washed is also provided in the washing chamber 301. The water collection cup (water storage part 200) is provided at the bottom of the inner tank 300, and the water collection cup is sealed with the inner tank 300. The spray arm assembly performs a rotational spray on the items to be washed, thereby washing the dishes. After washing, the washing water will gather at the water collection cup and be filtered through the filter system 100.

[0036] Specifically, the water collection cup is connected to a washing pump, which can extract the water collected in the water collection cup and pump it into the spray arm assembly to circulate and wash the dishes. In addition, the water collection cup is also connected to a drainage pump, and the pump housing of the drainage pump is connected to the water collection cup through a flow channel. When drainage is required, the drainage pump can discharge the water in the water collection cup to the outside of the dishwasher.

[0037] The washing pump is used to pump water from the water collection cup. When the washing pump draws water from the water collection cup, the washing water needs to pass through the filtering system 100 first. The filtering system 100 filters out food residues. The filtered water is then pumped into the spray arm assembly through the washing pump to spray and clean the dishes, and the cycle continues.

[0038] See also Figures 2 to 4 The filtering system 100 according to the embodiment of the present invention includes a cylindrical filtering component 10 , a coarse filtering assembly 40 and a connecting member 50 .

[0039] See also Figure 2 and Figure 3 , the cylindrical filter component 10 is in a hollow columnar shape (i.e., cylindrical) and is rotatably disposed in the water storage part 200, that is, the cylindrical filter component 10 can rotate in the water storage part 200. Specifically, in this embodiment, the water in the household appliance 1000 is filtered by the cylindrical filter component 10 and enters the water storage part 200, and then the water in the water storage part 200 is supplied to the household appliance 1000 for reuse under the action of the pumping device of the household appliance 1000 (such as the washing pump of the dishwasher). In this process, the water in the water storage part 200 flows in one direction, and the water generates friction with the surface of the cylindrical filter component 10, thereby causing the cylindrical filter component 10 to rotate. For example, in a dishwasher, a washing pump is connected to the water storage part 200. When it is necessary to wash the dishes in the dishwasher, the washing pump is turned on and drives the water flow. In this way, the washing water is rapidly discharged from the water storage part 200 under the drive of the washing pump, thereby generating a flowing water flow, and then a vortex can be formed in the water storage part 200, thereby driving the cylindrical filter component 10 to rotate. This arrangement can use the kinetic energy of the flowing water to drive the cylindrical filter component 10 to rotate, without the need to separately set a driving member to drive the cylindrical filter component 10 to rotate, saving space and reducing the cost of the household appliance 1000. At the same time, it can also largely solve the problem of food residues accumulating at the same position on the cylindrical filter component 10.

[0040] See also Figure 2 In this embodiment, the cylindrical filter component 10 includes an upper ring portion 12 , a lower ring portion 13 , a plurality of vertical ribs 14 , a connecting rib 15 and a plurality of fins 16 .

[0041] The upper ring portion 12 is located above the lower ring portion 13 and the two are arranged at intervals in the vertical direction. The two ends of each vertical rib 14 are fixedly connected to the upper ring portion 12 and the lower ring portion 13 respectively, and multiple vertical ribs 14 are arranged at intervals in the circumferential direction of the cylindrical filter component 10. The connecting rib 15 is annular, and the connecting rib 15 is located between the upper ring portion 12 and the lower ring portion 13 and is arranged at intervals therebetween. The connecting rib 15 is fixedly connected to multiple vertical ribs 14. Multiple fins 16 are fixedly arranged on the connecting rib 15 and are arranged at intervals around the circumference thereof.

[0042] Since the rotational power of the cylindrical filter component 10 comes from the water flow rapidly discharged from the water storage part 200 , the provision of the fins 16 can improve the driving effectiveness of the water flow on the cylindrical filter component 10 , thereby ensuring the rotational power of the cylindrical filter component 10 .

[0043] The upper ring portion 12 can maintain the structural stability of the cylindrical filter component 10. During the rotation of the cylindrical filter component 10, the center of the upper ring portion 12 can be maintained at the rotation center, which can prevent the cylindrical filter component 10 from tilting due to the excessive flow rate of the water flow, thereby affecting the rotation of the cylindrical filter component 10. The upper ring portion 12 and the lower ring portion 13 are connected by a plurality of spaced vertical ribs 14, so that the connection between the upper ring portion 12 and the lower ring portion 13 is stable. The connection of the plurality of vertical ribs 14 by the connecting ribs 15 can strengthen the strength of the cylindrical filter component 10. At the same time, a plurality of spaced fins 16 are arranged on the connecting ribs 15, which can increase the contact area between the cylindrical filter component 10 and the water flow, and can more easily drive the cylindrical filter component 10 to rotate during the flow of water.

[0044] In addition, in this embodiment, the fin 16 is arranged on the outside of the connecting rib 15. During the use of the household appliance 1000, for example, during the washing process of the dishwasher, the washing pump can pump water from the tangential direction of the water storage part 200, giving the fin 16 a force to rotate the cylindrical filter component 10, thereby not only increasing the effective utilization area of ​​the cylindrical filter component 10, but also providing favorable conditions for cleaning the cylindrical filter component 10.

[0045] It is understandable that in other embodiments, the fins may not be arranged on the connecting ribs, but may be directly arranged on the vertical ribs, and a plurality of fins may be arranged on each vertical rib, and the specific arrangement is not limited here.

[0046] Please continue reading Figures 2 to 4 The coarse filter assembly 40 is arranged above the cylindrical filter component 10. The coarse filter assembly 40 includes a planar filter component 41 and a lifting cup 42. The planar filter component 41 is located above the upper ring portion 12 of the cylindrical filter component 10. The top of the cylindrical filter component 10 is open. The lifting cup 42 is arranged above the planar filter component 41 and passes through the planar filter component 41 downward and is partially accommodated in the cylindrical filter component 10.

[0047] Specifically, the "planar filter component 41" mentioned here means that the filter component is roughly formed into a planar structure, and the horizontal dimension of the filter component is larger than its vertical dimension, but the shape of the filter component is not limited to a standard plane, for example, it can have a deformed structure such as a bend or a fold. Taking a dishwasher as an example, a hole is opened at the bottom of the inner tank 300 of the dishwasher, and the planar filter component 41 is arranged at the bottom of the inner tank 300 and partially extends out of the inner tank 300.

[0048] A through hole 411 is provided in the middle of the plane filter component 41 (see Figure 2 ), the lower part of the cup 42 is formed with an annular portion 422 (see Figure 4 ), the annular portion 422 penetrates the through hole 411 and at least partially extends into the cylindrical filter component 10, and the plane filter component 41 is provided with a support platform 412. The lifting cup 42 is provided with a support annular rib 421, and the support annular rib 421 is supported on the support platform 412. It can be understood that the lifting cup 42 can be composed of a plurality of annular ribs and longitudinal ribs that are staggered with each other. In this way, the structure of the lifting cup 42 is relatively simple and easy to form.

[0049] In this embodiment, a filter screen (not shown) is provided on the cylindrical filter component 10, and a filter screen (not shown) is also provided on the planar filter component 41. Generally, the aperture of the filter screen on the planar filter component 41 is larger than the aperture of the filter screen on the cylindrical filter component 10. The coarse filter assembly 40 (planar filter component 41 and lifting cup 42) is mainly used for coarse filtering of water entering the water storage part 200 to filter out larger and coarser residues or pollutants in the water flow, and the cylindrical filter component 10 is mainly used for filtering smaller particles of residues or pollutants.

[0050] See also Figures 2 to 4 , the cylindrical filter element 10 is connected through the connecting piece 50 (see Figure 2 ) is rotatably connected to the coarse filter assembly 40. The connecting member 50 includes a first sub-connecting member 51 and a second sub-connecting member 52 (see Figure 4 ), the first sub-connector 51 is arranged around the periphery of the second sub-connector 52. The first sub-connector 51 and the second sub-connector 52 are coaxially arranged and relatively rotatably connected, the first sub-connector 51 is fixedly connected to the cylindrical filter component 10, the second sub-connector 52 is connected to the coarse filter assembly 40, and the first sub-connector 51 is located between the cylindrical filter component 10 and the second sub-connector 52.

[0051] In this embodiment, the cylindrical filter component 10 and the coarse filter assembly 40 are rotatably connected through the first sub-connector 51 and the second sub-connector 52 which are coaxially arranged, so that the residue in the cylindrical filter component 10 can be prevented from leaking out from the installation gap between the cylindrical filter component 10 and the coarse filter assembly 40 without affecting the rotation of the cylindrical filter component 10, and the residue can be prevented from getting stuck in the installation gap between the cylindrical filter component 10 and the coarse filter assembly 40 and affecting the rotation of the cylindrical filter component 10. In this way, the arrangement of the connector 50 can solve the problems of residue leakage and residue jamming while ensuring that the cylindrical filter component 10 can rotate efficiently.

[0052] Specifically, in the illustrated embodiment, the first sub-connector 51 is fixedly connected to the upper ring portion 12 of the cylindrical filter component 10, the first sub-connector 51 is coaxially arranged with the upper ring portion 12, the second sub-connector 52 is connected to the annular portion 422 of the lifting cup 42, the central axis of the second sub-connector 52 can coincide with the central axis of the lifting cup 42, and the axis of the upper ring portion 12 can coincide with the rotation axis of the cylindrical filter component 10, so that the cylindrical filter component 10 can stably rotate relative to the coarse filter assembly 40 without affecting the lifting cup 42.

[0053] In addition, in the illustrated embodiment, the second sub-connector 52 is in contact with the lifting cup 42, and the lifting cup 42 is carried on the planar filter component 41. It is understandable that in other embodiments, the second sub-connector may also be fixedly connected to the lifting cup, such as by welding. In addition, in some embodiments, the second sub-connector may also be detachably connected to the lifting cup, for example, detachably connected by a thread or a buckle, so that the user can conveniently remove the lifting cup to empty the food residue in the lifting cup or replace the lifting cup. For another example, a slot may be formed on the second sub-connector, and a plug-in portion that cooperates with the slot may be formed on the lifting cup, and the plug-in portion can be smoothly rotated in the slot, and the lifting cup is detachably connected by the plug-in portion and the slot.

[0054] In this embodiment, the connecting member 50 may be a bearing, the first sub-connecting member 51 may be the outer ring of the bearing, and the second sub-connecting member 52 may be the inner ring of the bearing. That is to say, in this embodiment, the outer ring of the bearing and the upper ring portion 12 of the cylindrical filter component 10 are fixedly connected, and the inner ring of the bearing is contact-connected or fixedly connected or detachably connected to the lifting cup 42.

[0055] The above-mentioned "fixed connection" means that the two do not rotate relative to each other, for example, by welding, secondary injection molding, snap connection, threaded connection, interference fit and other connection methods. For example, the outer ring of the bearing and the upper ring portion 12 of the cylindrical filter component 10 can be fixedly connected by welding, secondary injection molding, interference fit, or the outer ring side wall of the bearing is provided with an external thread, and the inner side wall of the upper ring portion 12 is provided with an internal thread, and the two are fixedly connected by threads. Similarly, the inner ring of the bearing and the lifting cup 42 can also be fixedly connected by welding, secondary injection molding, interference fit, or the inner ring side wall of the bearing is provided with an internal thread, and the outer side wall of the lifting cup 42 is provided with an external thread, and the two are fixedly connected by threads. In the following embodiments, if the same or similar descriptions or instructions appear, they can also be understood by reference here.

[0056] Specifically, the bearing further includes a plurality of rolling elements, such as balls 53. An outer ring ball groove may be provided on the inner surface of the outer ring of the bearing, and an inner ring ball groove may be provided on the outer surface of the inner ring of the bearing. The balls 53 are in rolling contact with the outer ring ball groove and the inner ring ball groove at the same time.

[0057] In addition, the bearing further includes a retainer (not shown) disposed between the outer ring and the inner ring, and the retainer is used to retain the position of the rolling element, such as the ball 53. Specifically, the retainer is sleeved between the outer ring and the inner ring of the bearing, and a plurality of ball holes are disposed on the intermediate retainer, and the ball 53 is installed in the ball holes, and the ball 53 protrudes from the inner circumference and outer circumference of the intermediate retainer in the radial direction of the intermediate retainer. By providing the retainer, it is not only suitable for cooperating with a plurality of balls, but also when the plurality of balls 53 roll, each ball 53 can be spaced apart, thereby ensuring that the plurality of balls 53 can roll independently, preventing interference between the plurality of balls 53 and causing the cylindrical filter component 10 to have poor stability when rotating, and ensuring that the working reliability of the cylindrical filter component 10 is high. In this way, the cylindrical filter component 10 and the lifting cup 42 are rotatably connected through the bearing, and the rolling connection between the two can reduce the friction and rotation resistance of the cylindrical filter component 10, so that the cylindrical filter component 10 can rotate smoothly and efficiently in the water storage part 200.

[0058] It is understandable that, in some embodiments, the second sub-connector 52 may also be fixedly connected or detachably connected to the planar filter component 41. That is to say, the first sub-connector 51 is fixedly connected to the cylindrical filter component 10, and the second sub-connector 52 is fixedly connected or detachably connected to the planar filter component 41. When the two are fixedly connected, the fixed connection can be achieved by welding or secondary injection molding. When the two are detachably connected, a groove can be formed on the second sub-connector 52, and a protrusion that can be inserted into the groove can be formed on the planar filter component 41, and the protrusion can rotate smoothly in the groove, and the two are detachably connected by matching the groove and the protrusion.

[0059] In addition, in the illustrated embodiment, the first sub-connector 51 is fixedly connected to the cylindrical filter component 10, and the second sub-connector 52 is connected to the lifting cup 42 (fixedly connected or contact-connected or detachably connected). It is understandable that in other embodiments, the second sub-connector may be fixedly connected to the cylindrical filter component, the first sub-connector may be connected to the planar filter component or the lifting cup (fixedly connected or contact-connected or detachably connected), and the second sub-connector may be located between the cylindrical filter component and the first sub-connector, without specific limitation.

[0060] In addition, in some embodiments, the connector 50 may not be a bearing, but may be formed by two mutually engaged and mutually rotatable first and second snap rings, that is, the first sub-connector 51 is a first snap ring, and the second sub-connector 52 is a second snap ring. In one example, a slot may be formed on one of the first snap ring and the second snap ring, and a buckle portion may be formed on the other, and the two may be connected to each other by the slot and the buckle portion. The slot may be a continuous annular slot, so that when the two snap rings are connected, the first snap ring and the second snap ring can also rotate 360 ​​degrees relative to each other. Furthermore, the buckle portion and the slot may be in planar contact, so that the first snap ring and the second snap ring can rotate relatively smoothly, so that the cylindrical filter component 10 can rotate relatively smoothly relative to the mounting column 20.

[0061] It should be noted that, in this embodiment, the cylindrical filter component 10 and the lifting cup 42 are separately arranged. It can be understood that in some embodiments, the cylindrical filter component 10 can also be integrally formed with the lifting cup 42, that is, the cylindrical filter component 10 and the lifting cup 42 are fixedly connected together, the first sub-connector 51 of the connector 50 is fixedly connected to the cylindrical filter component 10 or the lifting cup 42, and the second sub-connector 52 is in contact with the planar filter component 41 or is fixedly connected or detachably connected.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "certain embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0063] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A filtering system for household appliances, characterized in that: The household appliance comprises a water storage portion, and the filtering system comprises: A cylindrical filter component, wherein the cylindrical filter component is rotatably disposed in the water storage portion; A coarse filter assembly, the coarse filter assembly is arranged on the cylindrical filter component, and the coarse filter assembly includes a cup and a plane filter component; A connecting member, wherein the cylindrical filter component is rotatably connected to the coarse filter assembly through the connecting member, wherein the connecting member comprises a first sub-connecting member and a second sub-connecting member, wherein the first sub-connecting member is arranged around the periphery of the second sub-connecting member, the first sub-connecting member and the second sub-connecting member are coaxially arranged and relatively rotatably connected, wherein one of the first sub-connecting member and the second sub-connecting member is connected to the cylindrical filter component, and the other of the first sub-connecting member and the second sub-connecting member is connected to the cup or the plane filter component; The lifting cup comprises an annular portion extending into the cylindrical filter component, the first sub-connector is fixedly connected to the cylindrical filter component, and the second sub-connector is connected to the annular portion; The cylindrical filter component includes an upper ring portion, the first sub-connector is fixedly connected to the upper ring portion, the first sub-connector is coaxially arranged with the upper ring portion, the second sub-connector is connected to the annular portion, the central axis of the second sub-connector coincides with the central axis of the lifting cup, and the axis of the upper ring portion coincides with the rotation axis of the cylindrical filter component.

2. The filtration system according to claim 1, characterized in that The connecting member includes a bearing, the first sub-connecting member is an outer ring of the bearing, and the second sub-connecting member is an inner ring of the bearing.

3. The filtration system according to claim 2, characterized in that: The bearing includes a retaining frame and a rolling element arranged between the outer ring and the inner ring, and the retaining frame is used to maintain the position of the rolling element.

4. The filtration system according to any one of claims 1 to 3, characterized in that: The lifting cup is at least partially disposed in the cylindrical filter component, and one of the first sub-connector and the second sub-connector is connected to the lifting cup.

5. The filtration system according to claim 4, characterized in that: The second sub-connector is detachably connected to the annular portion.

6. The filtration system according to any one of claims 1 to 3, characterized in that: The planar filter component is arranged above the cylindrical filter component, and one of the first sub-connector and the second sub-connector is connected to the planar filter component.

7. The filtration system according to claim 6, characterized in that The first sub-connecting member is fixedly connected to the cylindrical filter component, and the second sub-connecting member is detachably connected to the planar filter component.

8. The filtration system according to claim 1, characterized in that: The cylindrical filter component includes a lower ring portion and vertical ribs, the upper ring portion and the lower ring portion are spaced apart, the vertical ribs connect the upper ring portion and the lower ring portion, and one of the first sub-connector and the second sub-connector is fixedly connected to the upper ring portion.

9. The filtration system according to claim 1, characterized in that: The connecting member includes a snap ring, and the snap ring includes a first snap ring and a second snap ring that are snap-fitted and rotatable with each other. The first sub-connecting member is the first snap ring, and the second sub-connecting member is the second snap ring.

10. A household appliance, characterized in that: It comprises a water storage part and the filtering system according to any one of claims 1 to 9, wherein the filtering system is connected to the water storage part.

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