Clothes processing equipment

Abstract

A washing drum of the clothes treatment equipment is provided with a circulating filtering pipeline, the circulating filtering pipeline comprises a circulating pipeline and a draining pump, the circulating pipeline is provided with a filtering part, and the draining pump drives washing water to flow into the circulating pipeline from the washing drum and flow back to the washing drum after being filtered by the filtering part. The circulating filtering pipeline further comprises a water return pipe, the two ends of the water return pipe are communicated with the front end of the filtering piece and the drainage pump respectively, and a first switching valve is arranged on the water return pipe. And when the first switching valve is opened, the water return pipe is communicated with the circulating pipeline, so that backwashing of the filtering piece is realized. According to the clothes treatment equipment, the washing water can be filtered, and the filtering part after the washing water is filtered can be cleaned, so that the clothes washing effect is improved, the filtering part is free of maintenance, and the user experience is greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of household appliances, and in particular relates to a clothing processing device. Background Art

[0002] During the washing process, friction between clothes and between the clothes and the inner wall of the washing tub creates a lot of fiber debris. Once these fiber fragments fall off, they are transferred to all clothes as the clothes are turned, thrown, and rubbed in the washing tub. A common scenario is when a user forgets to remove a tissue from their pocket. The tissue becomes soaked in water during washing, breaking and disintegrating, distributing itself in the wash water. After washing, most of this flocculent material will cover the surface of the clothes. Both of these situations seriously affect the washing effect of the clothes, giving users an extremely poor laundry experience.

[0003] On the other hand, the filter element of a washing machine equipped with a washing water filtering device is prone to clogging during daily use, causing the device to be unusable and the washing water to be unable to be filtered, which still brings an extremely bad washing experience to users.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a clothing processing device that can filter washing water and clean the filter element after filtering the washing water, thereby improving the washing effect of clothes, achieving maintenance-free filter elements, and thus improving user experience.

[0006] To achieve the above-mentioned purpose, the basic concept of the technical solution adopted by the present invention is:

[0007] A clothing processing device, wherein a washing drum is equipped with a circulation filter pipeline, the circulation filter pipeline includes a circulation pipeline and a drainage pump, a filter element is provided on the circulation pipeline, the drainage pump drives washing water from the washing drum to flow into the circulation pipeline, and then flows back to the washing drum after being filtered by the filter element, the circulation filter pipeline also includes a return pipe, the two ends of the return pipe are respectively connected to the front end of the filter element and the drainage pump, and a first switching valve is provided on the return pipe; when the first switching valve is opened, the return pipe is connected to the circulation pipeline to realize backwashing of the filter element.

[0008] Preferably, the apparatus further comprises a drain pipe, one end of which is connected to the outside of the laundry processing apparatus and the other end of which is connected to a circulation pipe or a drainage pump, and the return pipe is connected to the circulation pipe or the drain pipe via the drainage pump; a second switching valve is provided on the circulation pipe and the drain pipe, and the second switching valve is used to selectively cut off either the drainage pipe or the circulation pipe;

[0009] When performing the circulating filtration, the first switching valve cuts off the return pipe, and the second switching valve cuts off the drain pipe;

[0010] When backwashing the filter element, the first switching valve opens the return pipe, the second switching valve cuts off the circulation pipeline, and the drainage pump drives the impurities in the filter element to be flushed out in the opposite direction of the water flow during circulation filtration and discharged to the outside of the clothing processing equipment.

[0011] Preferably, the first switching valve comprises a water inlet and a water outlet respectively connected to the circulation pipeline, and a water return port connected to the return pipe;

[0012] The first switching valve further includes an outer valve cylinder, the outer valve cylinder extending axially along the circulation pipeline, the water inlet and the water outlet being respectively provided at both ends of the outer valve cylinder, and the water return port opening on the side wall of the outer valve cylinder and extending outwardly of the outer valve cylinder;

[0013] Alternatively, the valve cavity of the first switching valve is inclined to the axial extension of the circulation pipeline, the water inlet and the water outlet are respectively arranged at both ends of the valve cavity, and the return water port opens on the side wall of the first switching valve and extends toward the outside and inside of the valve cavity.

[0014] Preferably, the first switching valve also includes an inner valve cylinder arranged in the outer valve cylinder, the outer wall of the inner valve cylinder is in contact with the inner wall of the outer valve cylinder, and the switching between closing the return water port and opening the return water port is achieved by sliding the inner valve cylinder in the outer valve cylinder.

[0015] Preferably, both ends of the outer valve cylinder are provided with receiving portions coaxial therewith, and the receiving portions protrude from the inner side wall of the outer valve cylinder in the radial direction;

[0016] The receiving portion includes a first receiving portion located at the water inlet end and a second receiving portion located at the water outlet end, wherein the first receiving portion and the second receiving portion respectively have a first receiving surface and a second receiving surface;

[0017] The inner valve cylinder includes a first contact end and a second contact end, and the first receiving surface and the second receiving surface are respectively used to receive the first contact end and the second contact end when the inner valve cylinder slides.

[0018] Preferably, the second contact end is provided with a flange, which extends inward along the radial direction of the inner valve cylinder; or, the flange extends inward along the radial direction of the inner valve cylinder and then bends, and extends along the axial direction of the inner valve cylinder toward the direction where the first contact end is located.

[0019] Preferably, when performing the circulating filtration, the washing water flows in from the water inlet and impacts the flange, driving the inner valve cylinder to slide to a position where the second contact surface abuts the second receiving portion, so that the side wall of the inner valve cylinder closes the return water port, and the washing water flows out from the water outlet;

[0020] When the filter element is backwashed, impurities and / or washing water flow into the filter element from the water outlet and impact the flange, driving the inner valve cylinder to slide to the position where the first contact end abuts the first receiving portion, so that the return water port is opened, and impurities and / or washing water flows out from the return water port; or, the water outlet is located above the water inlet, and after the circulating filtration is completed and the water flow stops, the inner valve cylinder slides to the position where the first contact end abuts the first receiving portion under the action of gravity, so that the return water port is opened, and impurities and / or washing water flows out from the return water port.

[0021] Preferably, the distance between any point on the inner side wall at the return water port opening and the plane where the first receiving surface is located is greater than or equal to the length of the inner valve cylinder; the distance between any point on the inner side wall at the return water port opening and the plane where the second receiving surface is located is less than or equal to the length of the inner valve cylinder.

[0022] Preferably, the first switching valve also includes a valve plate arranged in the valve cavity, and the valve plate is hinged to the inner wall of the first switching valve through a rotating shaft, and the switching between closing the return water port and opening the return water port is achieved by rotating the valve plate in the valve cavity.

[0023] Preferably, the rotating shaft is fixed on the inner side wall of the first switching valve between the water return port and the water inlet;

[0024] When the valve plate abuts against the inner wall of the first switching valve, its edge fits against the inner wall; when the valve plate abuts against the protruding part of the return water port, its edge extends out of the fitting point between the valve plate and the return water port.

[0025] Preferably, when performing the circulating filtration, the washing water flows in from the water inlet and pushes the valve plate to rotate to a position abutting against the return water port, so that the valve plate closes the return water port, and the washing water flows out from the water outlet;

[0026] When backwashing the filter element, impurities and / or washing water flow in from the water outlet and push the valve disc to rotate to a position abutting the inner wall of the first switching valve, the valve disc closes the water inlet, and impurities and / or washing water flow out from the return water port; or, the return water port is located above the water inlet, and after the circulating filtration is completed and the water flow stops, the valve disc rotates to a position abutting the inner wall of the first switching valve under the action of gravity, the valve disc closes the water inlet, and impurities and / or washing water flow out from the return water port.

[0027] After adopting the above technical solution, the clothes processing device provided by the present invention has the following beneficial effects compared with the prior art:

[0028] The laundry processing device provided by the present invention can filter the washing water to prevent impurities such as fiber scraps and flocs from adhering to the clothes and affecting the washing effect. It can also clean the filter element after filtering the washing water to prevent clogging of the filter element and the inability to filter the washing water. While further improving the washing effect of the clothes, it also achieves maintenance-free filtering, greatly enhancing the user experience. The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, as part of this disclosure, are intended to provide a further understanding of the disclosure. The exemplary embodiments of the disclosure and their descriptions are intended to explain the disclosure and do not constitute undue limitations thereon. Obviously, the drawings described below are merely examples, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0030] In the attached figure:

[0031] Figure 1 is a schematic diagram of the clothes processing device of the present invention;

[0032] Figure 2 is a schematic diagram of the filter element of the present invention being installed in a circulation pipeline;

[0033] Figure 3 is a schematic structural diagram of a single filter element according to the present invention;

[0034] Figure 4 is a schematic diagram of the four-way valve of the present invention;

[0035] Figure 5 is a schematic diagram of the return water port of the first switching valve of the present invention in an open state;

[0036] Figure 6 is a schematic diagram of the return water port of the first switching valve of the present invention in a closed state;

[0037] Figure 7 1 is a schematic diagram of an open water return port of a first switching valve according to another embodiment of the present invention;

[0038] Figure 8 It is a schematic diagram of the closed state of the return water port of the first switching valve according to another embodiment of the present invention.

[0039] like Figures 1 to 8As shown, 100, housing; 200, washing tub; 300, door; 410, water outlet pipe; 420, drain pipe; 430, circulation pipe; 440, water storage tank; 450, return pipe; 460, water diversion pipe; 500, drain pump; 600, filter element; 601, edge portion; 602, cone portion; 610, primary filter screen; 620, secondary filter screen; 630, tertiary filter screen; 700, second switching valve; 701, buffer chamber; 702, valve core chamber; 703, drive chamber; 710, housing; 711, first inlet; 712, second inlet; 713, first outlet; 714 , second outlet; 720, valve core; 721, connecting column; 722, first piston; 723, second piston; 730, electromagnet; 731, fixed seat; 740, connecting pipe; 800, first switching valve; 810, return water port; 820, water outlet; 830, water inlet; 840, outer valve cylinder; 841, first receiving part; 842, second receiving part; 843, first receiving surface; 844, second receiving surface; 850, inner valve cylinder; 851, first contact end; 852, second contact end; 853, flange; 860, valve chamber; 870, valve plate; 880, rotating shaft.

[0040] It should be noted that the drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0042] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0043] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0044] Example 1

[0045] During the washing process, friction between clothes and between the clothes and the inner wall of the washing tub creates a lot of fiber debris. Once these fiber fragments fall off, they are transferred to all clothes as the clothes are turned, thrown, and rubbed in the washing tub. A common scenario is when a user forgets to remove a tissue from their pocket. The tissue becomes soaked in water during washing, breaking and disintegrating, distributing itself in the wash water. After washing, most of this flocculent material will cover the surface of the clothes. Both of these situations seriously affect the washing effect of the clothes, giving users an extremely poor laundry experience.

[0046] In order to reduce or even avoid the occurrence of the above situation, this embodiment provides a clothes processing device, such as Figure 1 As shown, the washing machine comprises a housing 100, a washing tub 200 and a door 300, wherein the washing tub 200 is provided with a circulating filtering pipeline for washing water.

[0047] The circulating filtration pipeline includes a circulating pipeline and a drain pump 500. The drain pump 500 includes a water suction end and a drain end. The washing water is sucked in from the water suction end by the drain pump 500 and discharged from the drain end, thereby driving the circulation of the washing water in the entire filtration pipeline.

[0048] The circulation line is equipped with a filter element 600 for filtering the wash water. The drain pump 500 drives the wash water from the washing tub 200 into the circulation line, where it is filtered by the filter element 600 and then flows back to the washing tub 200. The filtered impurities remain in the filter element 600, and the filtered wash water flows back into the washing tub 200 to continue washing the clothes.

[0049] Preferably, the filter element 600 is installed inside the circulation pipeline; or, the circulation pipeline is disconnected at the location where the filter element 600 is installed, and the two ends of the disconnected circulation pipeline are respectively connected to the two ends of the filter element 600. The connection method can be threaded connection, plug connection, etc.

[0050] like Figure 2 3 , in this embodiment, the filter element 600 is preferably installed inside the circulation pipeline. The filter element 600 is a conical structure, similar in shape to a traffic cone, and includes an edge 601 and a cone 602. The edge 601 is an annular structure used to fix the filter element 600 to the circulation pipeline; the cone 602 is a filter mesh with dense filter holes for filtering the wash water.

[0051] More preferably, the filter element 600 is provided with multiple layers of filter screens (multiple cones 602), which are nested and stacked. The pores of the filter holes in the multiple layers of filter screens are different, and the pores gradually decrease as the washing water passes through.

[0052] like Figure 2 As shown, the filter element 600 provided in this embodiment is provided with three layers of filter screens, namely a primary filter screen 610, a secondary filter screen 620 and a tertiary filter screen 630. The filtering accuracy increases with the order of filtering the washing water.

[0053] For example, the first-stage filter 610 only filters coarse lint, the second-stage filter 620 only filters medium lint, and the third-stage filter 630 only filters fine lint. This not only increases the filtration area, but also, as water flows through the filters, the collected lint is gathered toward the tip of the cone 602, which occupies less space and creates less resistance to the circulating water.

[0054] On the other hand, the laundry processing apparatus is further provided with a drainage pipeline for discharging the washing water after the washing process is completed.

[0055] Therefore, the washing tub 200 is further installed with a drain pipe 420 , one end of which is connected to the outside of the clothes processing apparatus, and the other end of which is connected to the drain pump 500 .

[0056] Since the drain pump 500 is disposed on the circulation pipeline, the other end of the drain pipe 420 can also be connected to the circulation pipeline, so that the drain pipe 420 is connected to the drain pump 500 through the circulation pipeline.

[0057] like Figure 1 As shown, the circulation pipeline includes a water inlet pipe 460, one end of which is connected to the washing tub 200, and the other end is connected to the water suction end of the drainage pump 500; the circulation pipeline also includes an outlet pipe 410 and a circulation pipe 430. In this embodiment, more preferably, the drainage pipe 420 is connected to the drainage pump 500 through the outlet pipe 410.

[0058] At this time, one end of the outlet pipe 410 is connected to the drainage end of the drainage pump 500, and the other end is connected to the circulation pipe 430 and the drainage pipe 420 respectively; one end of the circulation pipe 430 is connected to the outlet pipe 410 and the drainage pipe 420 respectively, and the other end is connected to the washing drum 200.

[0059] When washing water is discharged, the washing water flows out of the washing tub 200 and is discharged to the outside of the clothing processing apparatus after passing through the water inlet pipe 460, the drainage pump 500, the water outlet pipe 410 and the drainage pipe 420 in sequence.

[0060] Preferably, in order to prevent the washing water from passing through the filter element 600 when being discharged, the filter element 600 is disposed in the circulation pipe 430 .

[0061] During the circulating filtration, the washing water flows out of the washing tub 200 and flows back to the washing tub 200 through the water inlet pipe 460, the drainage pump 500, the water outlet pipe 410 and the circulation pipe 430 in sequence.

[0062] In this embodiment, the drainage pipeline and the circulating filtered water pipeline preferably share the water inlet pipe 460, the drainage pump 500 and the water outlet pipe 410, which can reduce the number of pipelines provided in the clothing processing equipment and reduce the production cost of the clothing processing equipment.

[0063] On the other hand, although setting up a circulating filter pipeline to filter the washing water improves the washing effect of clothes, the filter element 600 is prone to clogging during daily use, causing the device to be unusable and the washing water to be unable to be filtered, which still brings an extremely bad washing experience to users.

[0064] In order to clean the filter element 600 and avoid the above situation, the circulating filtration pipeline further includes a return pipe 450, and the two ends of the return pipe 450 are respectively connected to the circulation pipe 430 and the drainage pump 500.

[0065] Preferably, the two ends of the return pipe 450 are respectively connected to the front end of the filter element 600 (to facilitate the description of the connection and positional relationship between the pipes, the front end and rear end appearing in the context respectively indicate: based on the flow direction of the washing water during circulating filtration, the front end refers to the upstream of this place, and the rear end refers to the downstream of this place) and the water suction end of the drain pump 500.

[0066] Further preferably, the return pipe 450 is directly connected to the water suction end of the drainage pump 500; or, the return pipe 450 is connected to the water inlet pipe 460, and then connected to the water suction end of the drainage pump 500 through the water inlet pipe 460; the return pipe 450 and the water inlet pipe 460 are combined into one pipe to connect to the drainage pump 500, which can reduce the setting of the interface of the drainage pump 500, simplify the structure of the drainage pump 500, and reduce production costs.

[0067] In order to prevent the washing water from entering the return pipe 450 when the circulating filtering pipeline filters the washing water, a first switching valve 800 is provided on the return pipe 450.

[0068] Preferably, the first switching valve 800 is set at the connection point between the return pipe 450 and the circulation pipe 430. The first switching valve 800 cuts off or opens the return pipe 450 to switch between the two states of disconnection or connection between the return pipe 450 and the circulation pipe 430.

[0069] When performing circulating filtration, the first switching valve 800 cuts off the return pipe 450 so that the return pipe 450 is not connected to the circulation pipe 430 .

[0070] After the circulating filtration is completed, the first switching valve 800 opens the return pipe 450, connecting the return pipe 450 with the circulation pipe 430. This in turn connects the front end of the filter element 600 in the circulation pipe 430 to the water suction port of the drain pump 500 through the return pipe 450. Driven by the drain pump 500, impurities such as lint and flocs accumulated in the filter element 600 are sucked out of the filter element 600 by the drain pump 500, discharged from the front end of the filter element 600, and then enter the return pipe 450, thus backwashing the filter element 600.

[0071] Alternatively, after the circulation filtration is completed, some washing water may remain in the circulation pipe 430 at the rear end of the filter element 600. Driven by the drainage pump 500, the remaining washing water impacts the filter element 600 in the opposite direction of the water flow direction during the circulation filtration, driving the impurities such as lint and flocs accumulated in the filter element 600 to be discharged from its front end. The washing water and impurities enter the return pipe 450 together, thereby realizing backwashing of the filter element 600.

[0072] When the washing water flows back and impacts the filter, the lint is more easily peeled off from the filter because the tip of the cone 602 accumulates a lot of lint and has a large resistance.

[0073] The return water pipe 450 is connected to the drain pipe 420 via the drain pump 500, and is used to discharge impurities and / or wash water discharged from the filter element 600 to the outside of the clothes treating apparatus.

[0074] Optionally, the return water pipe 450 is directly connected to the drain pipe 420 via the drain pump 500; or, the return water pipe 450 is connected to the circulation pipeline via the drain pump 500, and then connected to the drain pipe 420 through the circulation pipeline.

[0075] like Figure 1 As shown, in this embodiment, it is more preferred that the return pipe 450 is connected to the outlet pipe 410 through the drainage pump 500, and is connected to the drain pipe 420 through the outlet pipe 410.

[0076] To prevent the washing water from circulating and filtering, it flows into the drain pipe 420 and is discharged outside the laundry processing device; when draining, the washing water flows into the circulation pipe 430 for filtration. A second switching valve 700 is installed on the circulation pipe 430 and the drain pipe 420 to selectively shut off either the drain pipe 420 or the circulation pipe 430.

[0077] Preferably, the second switching valve 700 is disposed on the circulation pipe 430 at the front end of the filter element 600 .

[0078] During circulation filtration, the first switching valve 800 blocks the return pipe 450, and the second switching valve 700 blocks the drain pipe 420. After the washing water flows out of the washing drum 200, it cannot enter the return pipe 450 and the drain pipe 420, and can only flow in the circulation pipeline to complete the filtration; when backwashing the filter element 600, the first switching valve 800 opens the return pipe 450, and the second switching valve 700 blocks the circulation pipe 430 and opens the drain pipe 420. The drain pump 500 drives the impurities in the filter element 600 to be flushed out in the opposite direction of the water flow during circulation filtration, and is discharged to the outside of the clothing processing equipment along the path of the circulation pipe 430, the return pipe 450, the drain pump 500, the outlet pipe 410, and the drain pipe 420.

[0079] The first switching valve 800 and the second switching valve 700 cooperate with each other and work together to achieve the switching of the pipeline connection relationship during drainage, circulation filtration and backwashing.

[0080] Preferably, in order to enhance the backwashing effect of the wash water on the filter element 600, a water storage tank 440 for storing wash water is provided at the rear end of the filter element 600. Preferably, the water storage tank 440 is provided above the filter element 600 so that the wash water in the water storage tank 440 can impact the filter element 600 under the dual action of the suction force of the drain pump 500 and its own gravity, thereby achieving a better cleaning effect.

[0081] Preferably, the second switching valve 700 is a four-way valve. Figure 4 As shown, the second switching valve 700 includes a shell 710, and three cavities are arranged in the shell 710, namely a buffer chamber 701, a valve core chamber 702 and a drive chamber 703. The buffer chamber 701 is arranged on the leftmost side of the shell 710, the drive chamber 703 is arranged on the rightmost side of the shell 710, and the valve core chamber 702 is arranged between the buffer chamber 701 and the drive chamber 703, and the three cavities are coaxial.

[0082] The valve core chamber 702 houses a valve core 720 that can move left or right. The buffer chamber 701 allows air to compress when the valve core 720 moves leftward, preventing leftward movement. The drive chamber 703 houses the electromagnet 730. The diameter of the valve core chamber 702 is larger than that of both the buffer chamber 701 and the drive chamber 703, providing a limit for the left and right movement of the valve core 720.

[0083] To prevent the increased gas pressure from compressing the gas and hindering further movement of the valve core 720 when the valve core 720 moves to the left, the second switching valve 700 also includes a connecting pipe 740 that connects the buffer chamber 701 and the drive chamber 703. This balances the air pressure within the buffer chamber 701 and the drive chamber 703, facilitating movement of the valve core 720. When the valve core 720 moves, gas flows within the connecting pipe 740, dissipating heat from the coil of the electromagnet 730.

[0084] To facilitate the installation of the valve core 720 and the electromagnet 730, the drive chamber 703 can be a separate component, or after the electromagnet 730 is installed, it can be assembled together by a fixing method such as threaded connection. The electromagnet 730 is installed on the fixing seat 731, and the fixing seat 731 is fixed in the drive chamber 703.

[0085] Open pipes are provided in pairs on both sides of the shell 710, both of which are opened on the side wall of the valve core chamber 702; the open pipes include a first inlet 711 and a first outlet 713 opposite to the axis of the valve core chamber 702, a second inlet 712 and a second outlet 714 opposite to the axis of the valve core chamber 702.

[0086] Optionally, the first inlet 711 and the first outlet 713 are respectively connected to the drainage pipe 420 , and the second inlet 712 and the second outlet 714 are respectively connected to the circulation pipe 430 .

[0087] As shown in the figure, the valve core 720 is composed of a first piston 722 , a second piston 723 and a connecting column 721 .

[0088] There are two first pistons 722, which serve to close the two outlets and the inlet when the valve core 720 moves; the second piston 723 is arranged between the two first pistons 722, which serves to separate the washing water in the drain pipe 420 and the washing water in the circulation pipe 430; the connecting column 721 is used to connect the above three pistons.

[0089] Preferably, the valve core 720 is integrally machined and magnetized to become a magnet.

[0090] When the electromagnet 730 is not energized, the valve core 720 and the iron core of the electromagnet 730 attract each other, fixing the valve core 720 at the far right.

[0091] After the washing machine is powered off after a wash cycle, the second inlet 712 and second outlet 714 remain connected, meaning that the circulation pipe 430 is open and the drain pipe 420 is closed. The next wash cycle begins with a recirculation filter, and drainage is performed only after the main wash cycle is complete. To drain water, a current in a first direction is applied to the coil of electromagnet 730, causing the magnetic field it generates to repel the magnetic field of valve core 720. This pushes valve core 720 to the left, opening drain pipe 420 and closing circulation pipe 430.

[0092] The magnetic force of the valve core 720 is controlled so that when the valve core 720 moves to the left and the coil is de-energized, the attraction between the valve core 720 and the iron core is not sufficient to pull the two together.

[0093] When it is necessary to cut off the drain pipe 420 and open the circulation pipe 430 again, a second direction current is passed through the coil of the electromagnet 730, so that the magnetic field generated by it is attracted to the magnetic field of the valve core 720, and the valve core 720 moves to the rightmost end.

[0094] Preferably, before each washing program ends and the clothes processing device is shut down, a second direction current is applied to the coil to fix the valve core 720 at the rightmost end, so that the clothes processing device is in the initial state with the drain pipe 420 closed and the circulation pipe 430 open.

[0095] In another embodiment, the valve core 720 may not be magnetized, and two electromagnets 730 may be provided, one in the buffer chamber 701 and the other in the drive chamber 703, to achieve the above-mentioned function. Alternatively, the valve core 720 may not be magnetized, and an elastic member may be provided in the buffer chamber 701 to cause the valve core 720 to initially abut against the right side of the valve core chamber 702, to achieve the above-mentioned function.

[0096] like Figure 5 and Figure 6 As shown, the first switching valve 800 includes a water inlet 830 and a water outlet 820 respectively connected to the circulation pipe 430, and a return water port 810 connected to the return water pipe 450; it also includes an outer valve cylinder 840, the outer valve cylinder 840 extends along the axial direction of the circulation pipe 430, the water inlet 830 and the water outlet 820 are respectively arranged at both ends of the outer valve cylinder 840, and the return water port 810 opens on the side wall of the outer valve cylinder 840 and extends toward the outside of the outer valve cylinder 840; it also includes an inner valve cylinder 850 arranged in the outer valve cylinder 840, the outer side wall of the inner valve cylinder 850 is in contact with the inner side wall of the outer valve cylinder 840, and the switching between closing the return water port 810 and opening the return water port 810 is achieved by sliding the inner valve cylinder 850 in the outer valve cylinder 840.

[0097] In order to limit the sliding position of the inner valve cylinder 850 when it slides in the outer valve cylinder 840, both ends of the outer valve cylinder 840 are provided with a coaxial receiving part, which protrudes radially from the inner side wall of the outer valve cylinder 840; the receiving part includes a first receiving part 841 located at the water inlet 830 end and a second receiving part 842 located at the water outlet 820 end, and the first receiving part 841 and the second receiving part 842 respectively have a first receiving surface 843 and a second receiving surface 844; the inner valve cylinder 850 includes a first contact end 851 and a second contact end 852, and the first receiving surface 843 and the second receiving surface 844 are respectively used to receive the first contact end 851 and the second contact end 852 when the inner valve cylinder 850 slides.

[0098] The second contact end 852 is provided with a flange 853 , and the flange 853 extends inwardly along the radial direction of the inner valve cylinder 850 .

[0099] Alternatively, the flange 853 extends inward along the radial direction of the inner valve cylinder 850 and then bends, and extends along the axial direction of the inner valve cylinder 850 toward the direction where the first contact end 851 is located.

[0100] Preferably, the distance between any point on the inner side wall at the opening of the return water port 810 and the plane where the first receiving surface 843 is located is greater than or equal to the length of the inner valve cylinder 850, thereby ensuring that when the inner valve cylinder 850 abuts against the first receiving surface 843, the side wall of the inner valve cylinder 850 will not block the return water port 810, so that the return water port 810 is fully open; the distance between any point on the inner side wall at the opening of the return water port 810 and the plane where the second receiving surface 844 is located is less than or equal to the length of the inner valve cylinder 850, thereby ensuring that when the inner valve cylinder 850 abuts against the first receiving surface 843, the side wall of the inner valve cylinder 850 can completely close the return water port 810, and no gap will be left to cause water to leak from the return water port 810.

[0101] like Figure 4 As shown in Figure 6, when circulating filtration is performed, the second switching valve 700 cuts off the drain pipe 420, allowing the washing water to flow into the circulation pipe 430. The washing water flows in from the water inlet 830 and impacts the flange 853, driving the inner valve cylinder 850 to slide to the position where the second contact end 852 abuts the second receiving portion 842, so that the side wall of the inner valve cylinder 850 closes the return water port 810, and the washing water flows out from the water outlet 820.

[0102] like Figure 5 As shown, when the filter element 600 is backwashed, impurities and / or washing water flow in from the water outlet 820 and impact the flange 853, driving the inner valve cylinder 850 to slide to the position where the first contact end 851 abuts the first receiving portion 841, so that the return water port 810 is opened, and impurities and / or washing water flows out from the return water port 810; or, the water outlet 820 is located above the water inlet 830, and after the circulation filtration is completed and the water flow stops, the inner valve cylinder 850 slides to the position where the first contact surface abuts the first receiving portion 841 under the action of gravity, so that the return water port 810 is opened, and impurities and / or washing water flows out from the return water port 810.

[0103] Compared with the normal arrangement of providing an independent solenoid valve on each of the return pipe 450, the circulation pipe 430 and the drain pipe 420, the solution of combining the structure of this embodiment with the second switching valve 700 has a simpler structure, fewer control components, and only requires one power supply to solve the pipeline switching problem.

[0104] Example 2

[0105] like Figure 7 and Figure 8As shown, as another implementation of the first switching valve 800 in Example 1, the clothing processing device provided in this embodiment has a first switching valve 800 including a water inlet 830 and a water outlet 820 respectively connected to the circulation pipe 430 and a return water port 810 connected to the return water pipe 450.

[0106] The valve chamber 860 of the first switching valve 800 is different from the cylindrical structure in the first embodiment, and is a special-shaped structure.

[0107] Preferably, the valve cavity 860 of the first switching valve 800 is inclined to the axial extension of the circulation pipe 430, the water inlet 830 and the water outlet 820 are respectively arranged at both ends of the valve cavity 860, and the return water port 810 opens on the side wall of the first switching valve 800 and extends out and into the outside and inside of the valve cavity 860.

[0108] The first switching valve 800 also includes a valve plate 870 arranged in the valve cavity 860. The valve plate 870 is hinged to the inner wall of the first switching valve 800 through a rotating shaft 880. The switching between closing the return water port 810 and opening the return water port 810 is achieved by rotating the valve plate 870 in the valve cavity 860.

[0109] The rotating shaft 880 is fixed on the inner wall of the first switching valve 800 between the water return port 810 and the water inlet 830 .

[0110] Preferably, the inner sidewall of the first switching valve 800 between the return inlet 810 and the water inlet 830 is planar, meaning that the first switching valve 800 is a box-shaped structure rather than a cylindrical one. Both ends of the rotating shaft 880 are fixed to the planar inner sidewall. Compared to fixing to a curved surface, fixing to a flat surface is more convenient and simple. Furthermore, the inner sidewall of the first switching valve 800 does not hinder the rotation of the rotating shaft 880, making rotation of the rotating shaft 880 smoother. Furthermore, the valve disc 870 can bypass the curved sidewall and remain completely attached to the return inlet 810.

[0111] When the valve disc 870 abuts against the inner wall of the first switching valve 800, its edge fits against the inner wall, so that the valve disc 870 can completely close the water inlet 830; when the valve disc 870 abuts against the protruding part of the return water port 810, the valve disc 870 is completely fitted with the protruding part, and the edge of the valve disc 870 extends out of the fit with the return water port 810, so that a gap is left between the part of the valve disc 870 protruding from the return water port 810 and the inner wall of the first switching valve 800. When the washing water flows in from the water outlet 820, it can enter the gap between the valve disc 870 and the inner wall, thereby impacting the valve disc 870 and pushing the valve disc 870 to rotate.

[0112] like Figure 8As shown, during circulating filtration, washing water flows in from the water inlet 830 and pushes the valve plate 870 to rotate to a position abutting the return water port 810, so that the valve plate 870 closes the return water port 810, and the washing water flows out from the water outlet 820.

[0113] like Figure 7 As shown, when the filter element 600 is backwashed, impurities and / or washing water flow in from the water outlet 820 and push the valve plate 870 to rotate to a position abutting the inner wall of the first switching valve 800, the valve plate 870 closes the water inlet 830, and impurities and / or washing water flow out from the return water port 810; or, the return water port 810 is located above the water inlet 830, and after the circulation filtration is completed and the water flow stops, the valve plate 870 rotates to a position abutting the inner wall of the first switching valve 800 under the action of gravity, the valve plate 870 closes the water inlet 830, and impurities and / or washing water flow out from the return water port 810.

[0114] The inner valve cylinder 850 in the first embodiment cannot seal the water inlet 830 during backwashing, requiring the second switching valve 700 to block the circulation pipe 430, thereby preventing impurities and / or wash water from flowing out of the water inlet 830. In contrast, the valve disc 870 in this embodiment can directly seal the water inlet 830 during backwashing, eliminating the need for the second switching valve 700 to block the circulation pipe 430.

[0115] Therefore, by adopting the solution provided in this embodiment, the second switching valve 700 can be simplified into an ordinary solenoid valve, which only needs to be set on the pipeline of the drain pipe 420, which greatly simplifies the structure and reduces the cost.

[0116] After adopting the above technical solution, the clothes processing device provided by the present invention has the following beneficial effects compared with the prior art:

[0117] The clothing processing device provided by the present invention can filter the washing water to prevent impurities such as fiber scraps and flocs from adhering to the clothes and affecting the washing effect of the clothes; it can also clean the filter element after filtering the washing water to prevent the filter element from being blocked and causing the washing water to be unable to be filtered. While further improving the washing effect of the clothes, it also realizes the maintenance-free filter element, greatly improving the user experience.

[0118] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments using the above technical content without departing from the scope of the technical solution of the present invention. The implementation schemes in the above embodiments can be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A laundry treatment device, wherein a washing tub is provided with a circulating filter pipe, the circulating filter pipe comprising a circulating pipe and a drainage pump, the circulating pipe being provided with a filter element, the drainage pump driving the washing water from the washing tub into the circulating pipe, filtering the water through the filter element, and then flowing back into the washing tub, characterized in that: The circulating filtration pipeline also includes a return pipe, the two ends of which are respectively connected to the front end of the filter element and the drainage pump, and a first switching valve is provided on the return pipe; when the first switching valve is opened, the return pipe is connected to the circulating pipeline to realize backwashing of the filter element.

2. The clothes processing device according to claim 1, characterized in that: The device further includes a drain pipe, one end of which is connected to the outside of the clothing processing device and the other end of which is connected to the circulation pipe or the drainage pump. The return pipe is connected to the circulation pipe or the drain pipe via the drainage pump. A second switching valve is provided on the circulation pipe and the drain pipe, and the second switching valve is used to selectively cut off the drain pipe and the circulation pipe. When performing the circulating filtration, the first switching valve cuts off the return pipe, and the second switching valve cuts off the drain pipe; When backwashing the filter element, the first switching valve opens the return pipe, the second switching valve cuts off the circulation pipeline, and the drainage pump drives the impurities in the filter element to be flushed out in the opposite direction of the water flow during circulation filtration and discharged to the outside of the clothing processing equipment.

3. The clothes processing device according to claim 2, characterized in that: The first switching valve includes a water inlet and a water outlet respectively connected to the circulation pipeline and a water return port connected to the return pipe; The first switching valve further includes an outer valve cylinder, the outer valve cylinder extending axially along the circulation pipeline, the water inlet and the water outlet being respectively provided at both ends of the outer valve cylinder, and the water return port opening on the side wall of the outer valve cylinder and extending outwardly of the outer valve cylinder; Alternatively, the valve cavity of the first switching valve is inclined to the axial extension of the circulation pipeline, the water inlet and the water outlet are respectively arranged at both ends of the valve cavity, and the return water port opens on the side wall of the first switching valve and extends toward the outside and inside of the valve cavity.

4. The clothes processing device according to claim 3, characterized in that: The first switching valve also includes an inner valve cylinder arranged in the outer valve cylinder, the outer wall of the inner valve cylinder is in contact with the inner wall of the outer valve cylinder, and the switching between closing the return water port and opening the return water port is achieved by sliding the inner valve cylinder in the outer valve cylinder.

5. The clothes processing device according to claim 4, characterized in that: Both ends of the outer valve cylinder are provided with receiving portions coaxial therewith, and the receiving portions protrude from the inner side wall of the outer valve cylinder along its radial direction; The receiving portion includes a first receiving portion located at the water inlet end and a second receiving portion located at the water outlet end, wherein the first receiving portion and the second receiving portion respectively have a first receiving surface and a second receiving surface; The inner valve cylinder includes a first contact end and a second contact end, and the first receiving surface and the second receiving surface are respectively used to receive the first contact end and the second contact end when the inner valve cylinder slides.

6. The clothes processing device according to claim 5, characterized in that: The second contact end is provided with a flange, which extends inward along the radial direction of the inner valve cylinder; or, the flange extends inward along the radial direction of the inner valve cylinder and then bends, and extends along the axial direction of the inner valve cylinder toward the direction where the first contact end is located.

7. The clothes processing device according to claim 6, characterized in that: During the circulating filtration, washing water flows in from the water inlet and impacts the flange, driving the inner valve cylinder to slide to a position where the second contact surface abuts the second receiving portion, so that the side wall of the inner valve cylinder closes the return water port, and the washing water flows out from the water outlet; When the filter element is backwashed, impurities and / or washing water flow into the filter element from the water outlet and impact the flange, driving the inner valve cylinder to slide to the position where the first contact end abuts the first receiving portion, so that the return water port is opened, and impurities and / or washing water flows out from the return water port; or, the water outlet is located above the water inlet, and after the circulating filtration is completed and the water flow stops, the inner valve cylinder slides to the position where the first contact end abuts the first receiving portion under the action of gravity, so that the return water port is opened, and impurities and / or washing water flows out from the return water port.

8. The clothes processing device according to claim 6 or 7, characterized in that: The distance between any point on the inner side wall of the return water port opening and the plane where the first receiving surface is located is greater than or equal to the length of the inner valve cylinder; the distance between any point on the inner side wall of the return water port opening and the plane where the second receiving surface is located is less than or equal to the length of the inner valve cylinder.

9. The clothes processing device according to claim 3, characterized in that: The first switching valve also includes a valve plate arranged in the valve cavity, and the valve plate is hinged to the inner wall of the first switching valve through a rotating shaft. The switching between cutting off the return water port and opening the return water port is achieved by rotating the valve plate in the valve cavity.

10. The clothes processing device according to claim 9, characterized in that: The rotating shaft is fixed on the inner side wall of the first switching valve between the water return port and the water inlet; When the valve plate abuts against the inner wall of the first switching valve, its edge fits against the inner wall; when the valve plate abuts against the protruding part of the return water port, its edge extends out of the fitting point between the valve plate and the return water port.

11. The clothes processing device according to claim 9 or 10, characterized in that: When the circulating filtration is performed, the washing water flows in from the water inlet and pushes the valve plate to rotate to a position abutting against the return water port, so that the valve plate closes the return water port, and the washing water flows out from the water outlet; When backwashing the filter element, impurities and / or washing water flow in from the water outlet and push the valve disc to rotate to a position abutting the inner wall of the first switching valve, the valve disc closes the water inlet, and impurities and / or washing water flow out from the return water port; or, the return water port is located above the water inlet, and after the circulating filtration is completed and the water flow stops, the valve disc rotates to a position abutting the inner wall of the first switching valve under the action of gravity, the valve disc closes the water inlet, and impurities and / or washing water flow out from the return water port.

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