A washing machine and a control method thereof

Abstract

The application discloses a washing machine and a control method thereof. The washing machine comprises a water containing cylinder, a circulating filtering pipeline, a filtering device, a sewage pipeline and a control valve assembly. The water inlet end and the water outlet end of the circulating filtering pipeline are communicated with the water containing cylinder. The filtering device is arranged on the circulating filtering pipeline and has a water inlet, a filtered water outlet and a sewage outlet. The sewage pipeline receives the sewage discharged from the sewage outlet. The control valve assembly is arranged between the water inlet end of the circulating filtering pipeline and the filtering device and comprises a first valve cavity and a second valve cavity which are independent of each other. The first valve cavity is communicated with the water containing cylinder and the water inlet of the filtering device. The second valve cavity is communicated with the sewage pipeline and the sewage outlet of the filtering device. The control valve assembly has a first working state in which the water containing cylinder and the water inlet are conducted and the sewage outlet and the sewage pipeline are disconnected, and a second working state in which the water containing cylinder and the water inlet are disconnected and the sewage outlet and the sewage pipeline are conducted. In the application, the on-off of two independent water routes can be controlled simultaneously through the whole control valve assembly, the structure is simple, and the cost is reduced.

Description

Technical Field

[0001] This invention belongs to the field of washing machine technology, specifically, it relates to a washing machine and its control method. Background Technology

[0002] During the washing process, friction between clothes and between clothes and the washing machine itself causes lint to shed and mix into the wash water. If this lint isn't removed, it may adhere to the clothes after washing, affecting the cleaning effect. Therefore, modern washing machines are equipped with lint filters that continuously pass the wash water through the filter during the washing process to remove the lint.

[0003] The filters in most washing machines are located inside the inner drum or drain pump to remove lint and debris from the wash water. However, after prolonged use, these filters become clogged with lint and debris, affecting their filtration efficiency, clogging the drain valve / pump, and easily breeding bacteria. Timely cleaning is essential to prevent contamination of the wash water, causing secondary pollution of clothes and impacting user health. However, most washing machines require users to remove the filter for manual cleaning, which is inconvenient.

[0004] To address this, existing technologies have proposed filter devices with self-cleaning functions. However, to discharge wastewater after cleaning, additional piping structures are required. Furthermore, for solutions where the filter is located inside the drain pump or outside the outer drum, a circulation pipeline for washing water circulation is needed within the washing machine to achieve water circulation and filtration. This makes the internal water system more complex and can even occupy a significant amount of space, affecting the volume of clothes the washing machine can hold.

[0005] Meanwhile, the increased complexity of the water circuit structure leads to more complex and cumbersome control over the water flow. If a control valve is installed on each water circuit requiring control, the number of drive devices on the washing machine needs to be increased to achieve opening and closing, thus increasing production costs. Furthermore, controlling each valve individually makes the internal wiring of the washing machine more complex, increases assembly difficulty, and makes the control logic more intricate.

[0006] In view of this, the present invention is hereby proposed. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a washing machine and its control method, wherein a control valve assembly is provided, which can simultaneously control the on / off of the water tank and the water inlet of the filter device, as well as the on / off of the drain outlet of the filter device and the drain pipe, thereby realizing the switching between the two working processes of the filter device in filtration and draining, and simplifying the control structure of the water circuit.

[0008] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0009] A washing machine, comprising:

[0010] water container;

[0011] The circulating filter pipeline has its inlet and outlet connected to the water tank, respectively.

[0012] The filtration device is installed on the circulating filtration pipeline and has a water inlet, a filtered water outlet and a sewage outlet.

[0013] Sewage pipes are used to receive sewage discharged from sewage outlets;

[0014] It also includes a control valve assembly, which is located between the water inlet of the circulating filter pipeline and the filter device, including a first valve chamber and a second valve chamber that are independent of each other; the first valve chamber is connected to the water inlet of the water tank and the filter device, and the second valve chamber is connected to the sewage pipe and the sewage outlet of the filter device.

[0015] The control valve assembly has a first working state in which the water tank and the water inlet are connected and the drain outlet and the drain pipe are disconnected, and a second working state in which the water tank and the water inlet are disconnected and the drain outlet and the drain pipe are connected.

[0016] Furthermore, the control valve assembly includes a valve body, wherein a first valve chamber and a second valve chamber are formed inside the valve body;

[0017] The first valve chamber is provided with an inlet connected to the water tank and a circulating water outlet connected to the inlet; the second valve chamber is provided with a sewage inlet connected to the sewage outlet and a sewage outlet connected to the sewage pipe.

[0018] The valve body is equipped with a switching mechanism. In the first working state, the switching mechanism opens the circulating water outlet and blocks the sewage inlet and / or sewage outlet; in the second working state, the switching mechanism blocks the circulating water outlet and opens the sewage inlet and sewage outlet.

[0019] Preferably, the sewage outlet is normally open; in the first working state, the switching mechanism blocks the sewage inlet, and in the second working state, the switching mechanism opens the sewage inlet.

[0020] Furthermore, the washing machine also includes an external drain pipe for draining water to the outside, and the first valve chamber is also provided with a drain outlet connected to the external drain pipe;

[0021] In the first working state, the switching mechanism blocks the drainage outlet; in the second working state, the switching mechanism opens the drainage outlet.

[0022] Furthermore, the switching mechanism includes:

[0023] The flap is rotatably installed inside the valve body and has a first surface and a second surface facing away from each other.

[0024] A drainage seal is provided on the first surface of the flap and located inside the first valve chamber, for sealing the drainage outlet;

[0025] The sewage discharge seal is installed on the first surface of the flap and located inside the second valve chamber, and is used to block the sewage inlet;

[0026] A circulating seal is disposed on the second surface of the flap and located inside the first valve chamber, for sealing the circulating water outlet;

[0027] The drain outlet and sewage inlet are located on the same side surface of the valve body; in the first working state, the drain seal and the sewage seal respectively block the drain outlet and the sewage inlet; in the second working state, the flap rotates away from the drain outlet and the sewage inlet until the circulation seal blocks the circulating water outlet.

[0028] Furthermore, both the first valve chamber and the second valve chamber have a certain extension length, and their extension directions are parallel to each other.

[0029] The drainage outlet is located on the end face wall of the first valve cavity along its length extension direction, and the sewage inlet is located on the end face wall of the second valve cavity in the same direction.

[0030] Preferably, the water inlet is located on the other end wall of the first valve chamber, parallel to and opposite to the direction of the drain outlet; the sewage outlet is located on the other end wall of the second valve chamber, parallel to and opposite to the direction of the sewage inlet.

[0031] Furthermore, the orientation of the circulating water outlet is perpendicular to the orientation of the drain outlet, the control valve assembly switches from the first working state to the second working state, and the flap rotates 90° around its axis.

[0032] Preferably, the circulating water outlet is located on the side wall of the first valve chamber along its length extension direction, and the side wall of the circulating water outlet is adjacent to the side wall of the second valve chamber.

[0033] Furthermore, the switching mechanism also includes a driving component for driving the flap to rotate within the valve body;

[0034] Preferably, the driving component includes a drive motor disposed outside the valve body.

[0035] Furthermore, a circulation pump is installed between the water inlet end of the circulating filter pipeline and the control valve assembly.

[0036] Another object of the present invention is to provide a control method for the washing machine described above, wherein the control valve assembly is switched to a first working state, the water in the water tank enters the filter device through the first valve chamber for filtration, and the filtered water returns to the water tank.

[0037] The control valve assembly switches to the second working state, and the sewage in the filter device is discharged into the sewage pipe through the second valve chamber.

[0038] Furthermore, the washing machine also includes an external drain pipe for draining water to the outside, and the first valve chamber is provided with a circulating water outlet connected to the water inlet and a drain outlet connected to the external drain pipe;

[0039] The control valve assembly switches to the first working state, opens the circulating water outlet and blocks the drain outlet, and the water in the water tank is introduced into the first valve chamber and discharged from the circulating water outlet into the filter device.

[0040] The control valve assembly switches to the second working state, blocking the circulating water outlet and opening the drain outlet. Water in the water tank is introduced into the first valve chamber and discharged from the drain outlet, and then discharged from the washing machine through the external drain pipe.

[0041] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0042] In this invention, the washing machine is equipped with a control valve assembly that switches between a first working state and a second working state. This assembly can simultaneously control the flow of two independent water paths: the water tank and the inlet of the filter device, and the filter device outlet and the drain pipe. This allows the filter device to switch between filtration and draining processes, simplifying the internal water path control structure of the washing machine and reducing production costs.

[0043] In this invention, the valve body of the control valve assembly is provided with multiple openings for water to enter and exit, which are respectively connected to the corresponding first valve chamber and second valve chamber. The switching mechanism drives the flapper to move through a drive motor, so that multiple openings can be switched between open and closed states at the same time. The structure is simple and can realize the operation of draining water from the water tank and discharging sewage from the filter device at the same time, thus improving the working efficiency of the washing machine.

[0044] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0045] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0046] Figure 1 This is a schematic diagram of the water circuit connection structure of the control valve assembly in the first working state in an embodiment of the present invention;

[0047] Figure 2 This is a schematic diagram of the water circuit connection structure of the control valve assembly in the second working state in an embodiment of the present invention;

[0048] Figure 3 This is a schematic diagram of the control valve assembly in an embodiment of the present invention (second working state);

[0049] Figure 4 This is the present invention. Figure 3 Schematic diagram of section AA;

[0050] Figure 5 This is a schematic diagram of the structure of the washing machine in an embodiment of the present invention;

[0051] Figure 6 This is the present invention. Figure 5 Enlarged view of point B in the middle;

[0052] Figure 7 This is a schematic diagram of the filtration device in Embodiment 3 of the present invention;

[0053] Figure 8 This is the present invention. Figure 7 A schematic diagram of the CC section.

[0054] In the diagram: 10. Box body; 100. Water tank; 110. Window gasket; 210. Drainage pipe; 220. Circulation pipe; 230. Return water pipe; 231. Return water control valve; 240. Sewage pipe; 250. External discharge pipe; 260. Water tank drain pipe; 280. Connecting pipe; 400. Circulation pump; 500. Recovery device; 501. Filter impurities; 510. Shell; 520. Filter assembly; 531. First chamber; 532. Second chamber;

[0055] 600. Filter device; 601. First limiting surface; 602. Second limiting surface; 603. Third limiting surface; 604. Fourth limiting surface; 605. Fifth limiting surface; 606. Sixth limiting surface; 610. Filter chamber; 6101. Water inlet; 6102. Filtered water outlet; 6103. Sewage outlet; 6104. Mounting port; 611. Sealing support; 612. Sleeve; 613. Reinforcing rib; 620. 621. Filter mechanism; 622. Water outlet connector; 623. Rotating support; 624. Filter screen support; 625. Motor mounting part; 636. Filter screen; 641. First bearing; 642. Second bearing; 643. First seal; 644. Second seal; 645. Third seal; 656. Filter chamber flange; 657. Connecting part; 658. Insertion part; 659. Through port; 660. Drive mechanism;

[0056] 700, Control valve assembly; 701, Inlet; 702, Circulating water outlet; 703, Drain outlet; 704, Sewage inlet; 705, Sewage outlet; 710, Valve body; 711, First valve chamber; 712, Second valve chamber; 720, Switching mechanism; 732, Circulation seal; 733, Drain seal; 740, Flip plate; 741, First surface; 742, Second surface; 750, Drive motor.

[0057] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0058] To make the objectives, 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 with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0059] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0060] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0061] Example 1

[0062] like Figures 1 to 5 As shown, the washing machine described in this embodiment includes:

[0063] Water container 100;

[0064] The circulating filter pipeline has its inlet and outlet connected to the water tank 100, respectively.

[0065] The filter device 600 is installed on the circulating filter pipeline and has a water inlet 6101, a filtered water outlet 6102 and a sewage outlet 6103.

[0066] Sewage pipe 240 is used to receive sewage discharged from sewage outlet 6103;

[0067] The control valve assembly 700 is located between the inlet end of the circulating filter pipeline and the filter device 600, and includes a first valve chamber 711 and a second valve chamber 712 that are independent of each other. The first valve chamber 711 is connected to the water inlet 6101 of the water tank 100 and the filter device 600, and the second valve chamber 712 is connected to the sewage discharge pipeline 240 and the sewage outlet 6103 of the filter device 600.

[0068] The control valve assembly 700 of this embodiment has two different working states: a first working state in which the water tank 100 and the water inlet 6101 are connected and the drain outlet 6103 and the drain pipe 240 are disconnected; and a second working state in which the water tank 100 and the water inlet 6101 are disconnected and the drain outlet 6103 and the drain pipe 240 are connected.

[0069] In this embodiment, a circulation pump 400 is also provided between the water inlet end of the circulation filter pipeline and the control valve assembly 700. The control method of the washing machine includes:

[0070] When the control valve assembly 700 switches to the first working state, the circulation pump 400 is turned on, and the water in the water tank 100 enters the filter device 600 through the first valve chamber 711 for filtration. The filtered water then returns to the water tank 100.

[0071] The control valve assembly 700 switches to the second working state, and the sewage in the filter device 600 is discharged into the sewage pipe 240 through the second valve chamber 712.

[0072] In the above scheme, the control valve assembly 700 can simultaneously control the on / off connection between the water tank 100 and the water inlet 6101 of the filter device 600, as well as the on / off connection between the drain outlet 6103 of the filter device 600 and the drain pipe 240. By switching the working state of the control valve assembly 700, the filter device 600 can switch between the two working processes of filtration and drainage. The control valve assembly 700 can simultaneously control the on / off status of two relatively independent water paths, which helps to simplify the layout of the internal water path structure of the washing machine, and at the same time, the control logic for the on / off connection of the water paths is simpler.

[0073] In this embodiment, the control valve assembly 700 includes a valve body 710, and the valve body 710 has two independent valve chambers 711 and 712 inside.

[0074] The first valve chamber 711 is provided with an inlet 701 connected to the water tank 100 and a circulating water outlet 702 connected to the inlet 6101. The second valve chamber 712 is provided with a sewage inlet 704 connected to the sewage outlet 6103 and a sewage outlet 705 connected to the sewage pipe 240.

[0075] A switching mechanism 720 is provided inside the valve body 710. In the first working state, the switching mechanism 720 opens the circulating water outlet 702 and blocks the sewage inlet 704 and / or sewage outlet 705. In the second working state, the switching mechanism 720 blocks the circulating water outlet 702 and opens the sewage inlet 704 and sewage outlet 705.

[0076] The preferred embodiment is as follows: the sewage outlet 705 is normally open. In the first working state, the switching mechanism 720 blocks the sewage inlet 704. In the second working state, the switching mechanism 720 opens the sewage inlet 704.

[0077] Specifically, the control valve assembly 700 divides the internal space of the valve body 710 into two independent valve chambers, a first valve chamber 711 and a second valve chamber 712, by providing a partition within the valve body 710. A switching mechanism 720 passes through both the first valve chamber 711 and the second valve chamber 712, thereby enabling simultaneous control of both. Since the switching mechanism 720 needs to move within the valve body 710, after prolonged use, the sealing performance at the point where the switching mechanism 720 passes through the first valve chamber 711 and the second valve chamber 712 may decrease, leading to leakage between the two chambers.

[0078] In this embodiment, the sewage outlet 705 is set to a normally open state. The switching mechanism 720 controls whether the filter device 600 can discharge sewage into the sewage pipe 240 by opening / closing the sewage inlet 704. When the control valve assembly 700 is in the first working state, water in the water tank 100 enters the first valve chamber 711. Even if there is leakage from the first valve chamber 711 to the second valve chamber 712, since the sewage inlet 704 is blocked, the sewage outlet 6103 and the second valve chamber 712 are not connected, and water will not flow into the filter device 600 from the sewage outlet 6103.

[0079] In the specific solution of this embodiment, the filtration device 600 includes:

[0080] The filter chamber 610 has a water inlet 6101, a filtered water outlet 6102, and a sewage outlet 6103.

[0081] The filter mechanism 620 is rotatably disposed inside the filter chamber 610;

[0082] The drive mechanism 660 is connected to the filter mechanism 620 and is used to drive the filter mechanism 620 to rotate in the filter chamber 610.

[0083] The filtration mechanism 620 divides the interior of the filtration chamber 610 into an outer cavity and an inner cavity, wherein the water inlet 6101 communicates with the outer cavity and the filtered water outlet 6102 communicates with the inner cavity. When the control valve assembly 700 switches to the first working state, water in the water tank 100 enters the outer cavity through the water inlet 6101 under the action of the circulation pump 400, and then enters the inner cavity through the filtration mechanism 620 to achieve filtration. The lint carried in the water adheres to the outer wall of the filtration mechanism 620.

[0084] The filter mechanism 620 is driven to rotate by the drive mechanism 660, which agitates the water flow in the filter chamber 610. This causes the lint adhering to the outer wall of the filter mechanism 620 to be detached under the combined action of centrifugal force and agitated water flow, and then dissolves into the water inside the filter chamber 610. When the control valve assembly 700 switches to the second working state, the sewage inlet 704 opens, and the sewage outlet 6103 is connected to the sewage pipe 240. The sewage carrying the lint can then be discharged from the sewage outlet 6103 and enter the sewage pipe 240 through the second valve chamber 712.

[0085] Specifically, in this embodiment, the circulating filter pipeline of the washing machine includes:

[0086] The drain pipe 260 of the water tank connects the water tank 100 to the inlet of the circulating pump 400;

[0087] The drain pipe 210 is connected at one end to the outlet of the circulating pump 400 and at the other end to the inlet 701 of the control valve assembly 700.

[0088] The circulation pipeline 220 is connected at one end to the circulation water outlet 702 of the control valve assembly 700 and at the other end to the water inlet 6101 of the filter device 600.

[0089] The return water pipe 230 is connected at one end to the filtered water outlet 6102 of the filter device 600 and at the other end to the water tank 100, so as to transport the filtered water to the water tank 100.

[0090] In this embodiment, the return water pipe 230 is specifically connected to the window gasket 110 at the opening of the water tank 100.

[0091] The drain outlet 6103 of the filter device 600 is connected to the connecting pipe 280, which is connected to the sewage inlet 704 of the control valve assembly 700. The inlet end of the drain pipe 240 is connected to the sewage outlet 705 of the control valve assembly 700, forming a sewage discharge channel in the filter device 600.

[0092] Preferably, a return water control valve 231 is provided on the return water pipe 230 to control the opening and closing of the return water pipe 230. When the control valve assembly 700 switches to the second working state, the return water control valve 231 is closed to cut off the return water pipe 230, ensuring that the water in the filter chamber 610 will not flow out from the filtered water outlet 6102, which is conducive to fully discharging the residual lint in the filter device 600.

[0093] In a further embodiment, the washing machine also includes an external drain pipe 250 for draining water to the outside, and the first valve chamber 711 is also provided with a drain outlet 703 connected to the external drain pipe 250.

[0094] In the first working state, the switching mechanism 720 blocks the drainage outlet 703; in the second working state, the switching mechanism 720 opens the drainage outlet 703.

[0095] Accordingly, the control methods for washing machines include:

[0096] When the control valve assembly 700 switches to the first working state, the circulating water outlet 702 is opened and the drain outlet 703 is blocked, the circulating pump 400 is turned on, and the water in the water tank 100 is introduced into the first valve chamber 711 and discharged from the circulating water outlet 702 into the filter device 600.

[0097] The control valve assembly 700 switches to the second working state, blocks the circulating water outlet 702 and opens the drain outlet 703, the circulating pump 400 is turned on, the water in the water tank 100 is introduced into the first valve chamber 711 and discharged from the drain outlet 703, and discharged from the washing machine through the external drain pipe 250.

[0098] Specifically, during the washing / rinsing process, the control valve assembly 700 switches to the first working state and opens the return water control valve 231, turns on the circulation pump 400, draws water out of the water tank 100, discharges it from the circulation water outlet 702 when passing through the control valve assembly 700, enters the filter device 600 to remove lint, and then returns to the water tank 100 through the return water pipe 230.

[0099] After washing / rinsing, the control valve assembly 700 switches to the second operating state, closes the return water control valve 231, and starts the circulation pump 400. Water in the water tank 100 is drawn out and discharged from the drain outlet 703 through the control valve assembly 700, and then discharged from the washing machine through the external drain pipe 250. At the same time, because the wastewater inlet 704 of the control valve assembly 700 is open, the wastewater carrying lint in the filter chamber 610 is discharged through the drain outlet 6103, enters the second valve chamber 712 of the control valve assembly 700 through the wastewater inlet 704, and then is discharged from the wastewater outlet 705 into the drain pipe 240.

[0100] In the above solution, the filter device 600 can autonomously discharge filter impurities such as lint remaining inside during the circulating filtration process, saving users the trouble of manually cleaning the filter device 600. When the control valve assembly 700 is in the second working state, the inlet 701 and the outlet 703, as well as the sewage inlet 704 and the sewage outlet 705 are simultaneously connected. The operation of the water tank 100 draining water to the outside of the washing machine and the operation of the filter device 600 discharging sewage can be carried out simultaneously, improving the working efficiency of the washing machine and enhancing the user experience.

[0101] In the specific solution of this embodiment, such as Figure 3 and Figure 4 As shown, the switching mechanism 720 includes:

[0102] The flap 740 is rotatably mounted inside the valve body 710 and has a first surface 741 and a second surface 742 facing away from each other.

[0103] The drainage seal 733 is disposed on the first surface 741 of the flap 740 and located inside the first valve cavity 711, and is used to block the drainage outlet 703.

[0104] The sewage sealing element is set on the first surface 741 of the flap 740 and located inside the second valve chamber 712, and is used to block the sewage inlet 704.

[0105] The circulating seal 732 is disposed on the second surface 742 of the flap 740 and located inside the first valve chamber 711, and is used to block the circulating water outlet 702.

[0106] The drain outlet 703 and the sewage inlet 704 are located on the same side surface of the valve body 710. In the first working state, the drain seal 733 and the sewage seal respectively block the drain outlet 703 and the sewage inlet 704; in the second working state, the flap 740 rotates away from the drain outlet 703 and the sewage inlet 704 until the circulation seal 732 blocks the circulating water outlet 702.

[0107] The switching mechanism 720 also includes a drive unit for driving the flap 740 to rotate within the valve body 710. Specifically, the drive unit includes a drive motor 750 disposed outside the valve body 710.

[0108] The drive motor 750 is located outside the valve body 710, avoiding the risk of contact with water and thus enhancing safety. The control valve assembly 700 drives the flap 740 via a single drive motor 750, simultaneously controlling the opening / closing states of the circulating water outlet 702, the drainage outlet 703, and the sewage inlet 704, resulting in a simple structure. Compared to existing technologies that require separate drive valves for each independent water path, this design effectively saves costs.

[0109] In this embodiment, both the first valve chamber 711 and the second valve chamber 712 of the control valve assembly 700 have a certain extension length, and their extension directions are parallel to each other. Specifically, the first valve chamber 711 and the second valve chamber 712 extend horizontally and are arranged parallel to each other.

[0110] The drain outlet 703 is located on the right end face wall of the first valve chamber 711 along its length extension direction, and the sewage inlet 704 is located on the right end face wall of the second valve chamber 712.

[0111] Preferably, the water inlet 701 is located on the left end face of the first valve chamber 711, parallel to and opposite to the orientation of the drain outlet 703. The sewage outlet 705 is located on the left end face of the second valve chamber 712, parallel to and opposite to the orientation of the sewage inlet 704. When the control valve assembly 700 is in the second working state, the water flows from left to right in the first valve chamber 711 and from right to left in the second valve chamber 712. The water flow experiences less resistance, and the washing machine drains and the filter device 600 discharges wastewater more smoothly.

[0112] The orientation of the circulating water outlet 702 is perpendicular to the orientation of the drain outlet 703. The control valve assembly 700 switches from the first working state to the second working state, and the flap 740 rotates 90° around its axis.

[0113] Preferably, the circulating water outlet 702 is located on the side wall of the first valve chamber 711 along its length extension direction, and the side wall of the circulating water outlet 702 is adjacent to the side wall of the second valve chamber 712.

[0114] Specifically, in this embodiment, using Figure 3 Taking the orientation as an example, the first valve chamber 711 is located above the second valve chamber 712, and the circulating water outlet 702 is located on the front side wall of the first valve chamber 711, and the front side wall of the first valve chamber 711 is adjacent to the front side wall of the second valve chamber 712.

[0115] When the control valve assembly 700 is in its first operating state, the flap 740 approaches and becomes parallel to the right end face wall of the first valve chamber 711 and the second valve chamber 712, causing the drain seal 733 to block the drain outlet 703 and the sewage seal to block the sewage inlet 704. When the control valve assembly 700 switches to its second operating state, the drive motor 750 drives the flap 740 to rotate forward 90°, causing the circulation seal 732 to block the circulating water outlet 702. At this time, the drain seal 733 separates from the drain outlet 703, opening the drain outlet 703; the sewage seal separates from the sewage inlet 704, opening the sewage inlet 704.

[0116] In this embodiment, a control valve assembly 700 is provided in the washing machine. A drive motor 750 controls the water in the water tank 100 to be transported to the filter device 600 or to the external drain pipe 250, and simultaneously controls whether wastewater is discharged from the drain port 6103 of the filter device 600. The washing machine's circulation filtration, drainage, and the wastewater discharge operation of the filter device 600 are all controlled by the same control valve assembly 700, simplifying the internal water circuit structure of the washing machine, saving space, and reducing costs.

[0117] Example 2

[0118] like Figure 5 and Figure 6 As shown, this embodiment is a further limitation of the first embodiment above. The washing machine also includes a recycling device 500, which is connected to the outlet end of the drain pipe 240 and is used to collect the sewage discharged by the filter device 600.

[0119] Specifically, the recycling device 500 is used to collect filter impurities 501 such as lint discharged with the wastewater.

[0120] The filter impurities 501 may contain fine lint. If the wastewater carrying the filter impurities 501 is directly fed into the drain of the washing machine and discharged with the washing machine, the fine lint will enter the ecological cycle, thereby harming the ecological environment and human health.

[0121] The washing machine in this embodiment is equipped with a recycling device 500. After the wastewater carrying the filtered impurities 501 is discharged from the drain outlet 6103, it can enter the recycling device 500 through the drain pipe 240 and be collected, instead of entering the drainage water flow and being discharged from the washing machine with the drainage water flow.

[0122] In a further embodiment, the recycling device 500 includes:

[0123] The housing 510 has a recovery chamber inside;

[0124] A filter assembly 520 is disposed in the recovery chamber, dividing the recovery chamber into a first chamber 531 and a second chamber 532.

[0125] The drain outlet 6103 of the filter device 600 is connected to the first chamber 531. Wastewater carrying filter impurities 501 enters the first chamber 531, is filtered by the filter assembly 520, and then enters the second chamber 532. The filter impurities 501 are collected in the first chamber 531.

[0126] In the above scheme, the recycling device 500 is equipped with a filter assembly 520 to filter the wastewater discharged from the filter device 600, separating the filter impurities 501 from the water. The filter assembly 520 divides the interior of the recycling device 500 into a first chamber 531 and a second chamber 532. The filter impurities 501 in the wastewater are blocked by the filter assembly 520, thereby collecting the filter impurities 501 on the upper surface of the filter assembly 520 in the first chamber 531. The filtered clean water is collected in the second chamber 532. The user can directly collect and process the separated filter impurities 501, avoiding the situation where the filter impurities 501 are mixed in the water and cannot be effectively treated.

[0127] Specifically, the filter assembly 520 can be a frame horizontally positioned at a certain height within the recovery chamber and a filter screen laid on the frame. After the wastewater carrying the filtered impurities 501 enters the first chamber 531, the water can pass through the filter assembly 520 into the second chamber 532. The filtered impurities 501 are blocked by the filter screen and remain on the upper surface of the filter assembly 520.

[0128] In this embodiment, the washing machine also includes a cabinet 10, a water tank 100, and a filter device 600, all of which are disposed inside the cabinet 10. A recyclable device 500 is inserted into and removed from the cabinet 10, allowing the user to remove the recyclable device 500 from the cabinet 10 for cleaning.

[0129] Specifically, the housing 510 of the recycling device 500 is insertable / removable from the housing 10, and the upper side of the housing 510 has an opening. When the user removes the housing 510 from the housing 10, the filter impurities 501 adhering to the upper surface of the filter assembly 520 can be cleaned through the opening on the upper side of the housing 510. Preferably, the filter assembly 520 is detachably connected to the housing 510, allowing the user to remove the filter assembly 520 from inside the housing 510 for cleaning, making the operation more convenient.

[0130] In a preferred embodiment, a water outlet is provided on the second chamber 532 for discharging filtered clean water. By providing a water outlet on the second chamber 532, the clean water entering the second chamber 532 can be promptly discharged from the recovery device 500, preventing overflow of the recovery device 500 when a large amount of wastewater is discharged from the filtration device 600. Otherwise, the capacity of the second chamber 532 would need to be increased, which would require a larger volume of the recovery device 500, resulting in it occupying a large space inside the washing machine and hindering the miniaturization of the overall washing machine size.

[0131] On the other hand, the water in the second chamber 532 can be automatically discharged from the outlet. When cleaning the recycling device 500, the user only needs to clean the filter impurities 501 on the filter assembly 520, without having to manually pour out the clean water in the second chamber 532. When the filter assembly 520 is detachably installed in the housing 510, the user does not even need to completely remove the housing 510 from the washing machine's cabinet 10; they only need to remove the filter assembly 520 for cleaning, making operation more convenient.

[0132] In a preferred embodiment, the outlet of the second chamber 532 can be connected to the return water pipe 230, or directly connected to the water container 100 through a pipe.

[0133] Since the wastewater entering the recycling device 500 is filtered by the filter assembly 520, the filtered impurities 501 are removed, and the water collected in the second chamber 532 is clean water without filtered impurities 501. This clean water is then sent to the water tank 100 for reuse, thereby reducing the amount of water required for the washing machine to continue operating and achieving the goal of saving water consumption.

[0134] In another preferred embodiment, the water outlet of the second chamber 532 can be directly or indirectly connected to the outside of the washing machine. For example, the water outlet of the second chamber 532 can be connected to the external drain pipe 250 through a pipe, so that the water collected in the second chamber 532 can be discharged from the washing machine through the external drain pipe 250.

[0135] Since the water collected in the second chamber 532 is clean water without filtered impurities 501, directly discharging it will not cause the problem of fine lint entering the ecological cycle.

[0136] In this embodiment, a recycling device 500 is installed inside the washing machine. Wastewater containing filtered impurities 501 discharged from the filtration device 600 passes sequentially through the connecting pipe 280, the control valve assembly 700, and the drain pipe 240 before being collected in the recycling device 500, instead of being directly discharged into the washing machine's drain water. This avoids the situation where fine lint from the filtered impurities 501 enters the ecological cycle with the drain water, potentially impacting the ecological environment and human health. The recycling device 500 is equipped with a filter assembly 520 to filter the collected wastewater, thereby separating the filtered impurities 501 from the water, facilitating the cleaning of the filtered impurities 501.

[0137] Example 3

[0138] like Figure 7 and Figure 8 As shown, this embodiment further defines the filter device 600 in Embodiment 1 or 2 above. The filter water outlet 6102 of the filter device 600 extends outward from the filter cavity 610 to form a sealing support portion 611. One end of the filter mechanism 620 has a water outlet connector 621 inserted into the sealing support portion 611, and the water outlet connector 621 is rotatably and sealingly connected to the sealing support portion 611. A first bearing 631 is sleeved on the water outlet connector 621, and a first sealing element 641 is provided on the side of the first bearing 631 facing the inside of the filter cavity 610 to seal the gap between the water outlet connector 621 and the sealing support portion 611.

[0139] Specifically, the filtration mechanism 620 includes a filter screen support and a filter screen 625, wherein the filter screen support includes:

[0140] The filter support 623 is located inside the filter chamber 610, and the filter 625 covers the surface of the filter support 623.

[0141] The water outlet connector 621 is located at the left end of the filter screen support 623 and is rotatably inserted into the sealing support 611.

[0142] The rotating support part 622 is located at the right end of the filter support part 623 and is rotatably connected to the filter chamber 610.

[0143] In the above scheme, a first bearing 631 is provided between the water outlet connector 621 and the sealing support part 611 to support the water outlet connector 621, making the rotation of the water outlet connector 621 within the sealing support part 611 smoother and ensuring structural stability, thus guaranteeing the stable rotation of the filter mechanism 620 within the filter chamber 610. A first seal 641 is provided on the right side of the first bearing 631, preventing washing water in the filter chamber 610 from entering the gap between the water outlet connector 621 and the sealing support part 611, preventing the first bearing 631 from contacting water, avoiding failure of the first bearing 631, and ensuring the effective functioning of the first bearing 631. At the same time, the first seal 641 also prevents unfiltered washing water from flowing out of the filtered water outlet 6102 through the sealing support part 611, which would affect the lint removal efficiency of the filter device 600.

[0144] In the specific embodiment, the first sealing member 641 is sleeved on the water outlet connector 621, the inner wall of the first sealing member 641 is sealed to the outer wall of the water outlet connector 621, and the outer wall of the first sealing member 641 is rotatably sealed to the inner wall of the sealing support part 611.

[0145] In a further embodiment, the filter device 600 further includes a second seal 642, which is disposed on the side of the first bearing 631 facing away from the inside of the filter cavity 610, and blocks the gap between the water outlet connector 621 and the sealing support 611.

[0146] Specifically, the second sealing element 642 is sleeved on the water outlet connector 621, the inner wall of the second sealing element 642 is sealed to the outer wall of the water outlet connector 621, and the outer wall of the second sealing element 642 is rotatably sealed to the inner wall of the sealing support part 611.

[0147] In the above scheme, the water flowing out through the water outlet 621 can be blocked by the second seal 642 and will not come into contact with the first bearing 631. The first bearing 631 is located between the first seal 641 and the second seal 642, which ensures that the installation environment of the first bearing 631 is water-free to the greatest extent, and avoids the first bearing 631 from rusting when it comes into contact with water, which would affect the smoothness of the rotation of the filter mechanism 620.

[0148] In a further embodiment, the inner wall of the sealing support 611 has a stepped structure, and a first limiting surface 601, a second limiting surface 602, and a third limiting surface 603 with an annular structure and gradually decreasing inner diameter are formed sequentially from one end of the sealing support 611 to the outside of the filter cavity 610.

[0149] The surface of the first seal 641 facing the outside of the filter cavity 610 abuts against the first limiting surface 601, the surface of the first bearing 631 facing the outside of the filter cavity 610 abuts against the second limiting surface 602, and the surface of the second seal 642 facing the outside of the filter cavity 610 abuts against the third limiting surface 603.

[0150] In the above scheme, multiple vertical annular limiting surfaces are formed on the inner wall of the stepped sealing support 611, which respectively abut against the left side surfaces of the first seal 641, the first bearing 631 and the second seal 642. This restricts the movement of the above three components in the axial direction of the water outlet connector 621 and prevents the mating structure between the water outlet connector 621 and the sealing support 611 from loosening during the rotation of the filter mechanism 620.

[0151] In a preferred embodiment, the outer diameter of the end of the water outlet connector 621 near the outside of the filter chamber 610 is smaller than the outer diameter of the other end. A fourth limiting surface 604 with an annular structure and perpendicular to the axis of the water outlet connector 621 is formed on the outer wall of the water outlet connector 621. The surface of the first bearing 631 facing the inside of the filter chamber 610 abuts against the fourth limiting surface 604.

[0152] By setting the outer diameter of the left end of the water outlet connector 621 to be smaller than that of the right end, a fourth limiting surface 604 facing to the left is formed at the abrupt change in outer diameter, which abuts against the right side surface of the first bearing 631. In this way, the first bearing 631 has limiting structures on both sides, making the structure more stable.

[0153] In this embodiment, the end of the sealing support 611 away from the filter chamber 610, that is, the left end of the sealing support 611, is connected to the filter chamber flange 650. The filter chamber flange 650 has a through-hole 653 in the middle that communicates with the water outlet connector 621. The outer periphery of the through-hole 653 extends away from the sealing support 611 to form a connecting part 651.

[0154] Preferably, the surface of the filter chamber flange 650 facing the sealing support 611 has a protruding insertion portion 652, which is inserted into the opening at the left end of the sealing support 611.

[0155] In the above scheme, the left end of the sealing support 611 is connected to the filter chamber flange 650, and a connecting part 651 is formed on the filter chamber flange 650. The outer diameter of the connecting part 651 is smaller than the outer diameter of the sealing support 611, and the inner diameter of the connecting part 651 is preferably equal to the inner diameter of the water outlet connector 621. When the filter device 600 is installed in the washing machine, it is connected to the return water pipe through the connecting part 651 on the filter chamber flange 650. Compared with the method of directly connecting the return water pipe to the left end of the sealing support 611, the installation is easier.

[0156] The filter chamber flange 650 has a plug-in portion 652 on the right side, which is inserted into the left end opening of the sealing support portion 611, facilitating the positioning of the filter chamber flange 650 and the sealing support portion 611 during assembly. Several fixing portions are respectively provided on the outer periphery of the filter chamber flange 650 and the sealing support portion 611, and the filter chamber flange 650 and the sealing support portion 611 are fixed by screws passing through the fixing portions.

[0157] In a further embodiment, the rotating support portion 622 at the right end of the filter mechanism 620 extends outward from the filter cavity 610 along its rotation axis, and the filter cavity 610 is provided with a mounting port 6104 through which the rotating support portion 622 passes. The rotating support portion 622 and the mounting port 6104 are rotatably and sealingly connected.

[0158] In this embodiment, the filter mechanism 620 is driven to rotate by the drive mechanism. To prevent the drive mechanism from contacting the washing water, the drive mechanism is located outside the filter chamber 610. For this purpose, a rotating support 622 extends from the right end of the filter chamber 610, and a motor mounting part 624 is provided at the right end of the rotating support 622 for connecting to the drive mechanism, such as a motor.

[0159] Furthermore, the outer periphery of the mounting port 6104 extends outward from the filter cavity 610 along the axis of the rotating support portion 622 to form a sleeve portion 612, and a third sealing member 643 is fitted onto the rotating support portion 622. The inner wall of the third sealing member 643 is sealed to the outer wall of the rotating support portion 622, and the outer wall of the third sealing member 643 is rotatably sealed to the inner wall of the sleeve portion 612.

[0160] A second bearing 632 is also provided between the sleeve portion 612 and the rotating support portion 622. The second bearing 632 is sleeved on the rotating support portion 622 and is located on the side of the third seal 643 facing the outside of the filter chamber 610.

[0161] In the above design, the third seal 643 prevents water in the filter chamber 610 from leaking out of the mounting port 6104, and the second bearing 632 supports the rotating support 622, ensuring smoother relative rotation between the rotating support 622 and the sleeve 612. The second bearing 632 is located on the right side of the third seal 643, preventing contact with water in the filter chamber 610 and thus avoiding failure.

[0162] In a preferred embodiment, the inner diameter of the sleeve portion 612 near the outside of the filter chamber 610 is smaller than the inner diameter of the other end. A fifth limiting surface 605 with an annular structure is formed on the inner wall of the sleeve portion 612 and is perpendicular to the axis of the rotating support portion 622. The surface of the third sealing member 643 facing the outside of the filter chamber 610 abuts against the fifth limiting surface 605.

[0163] The outer diameter of the rotating support 622 near the outside of the filter chamber 610 is smaller than that of the other end. A sixth limiting surface 606 with an annular structure and perpendicular to the axis of the rotating support 622 is formed on the outer wall of the rotating support 622. The surface of the second bearing 632 facing the inside of the filter chamber 610 abuts against the sixth limiting surface 606.

[0164] In the above design, the inner diameter of the right end of the sleeve portion 612 is smaller than that of the left end, and a fifth limiting surface 605 facing left is formed at the abrupt change in its inner diameter, abutting against the right side surface of the third seal 643. The outer diameter of the right end of the rotating support portion 622 is smaller than that of the left end, and a sixth limiting surface 606 facing right is formed at the abrupt change in its outer diameter, abutting against the left side surface of the second bearing 632. This structure restricts the axial movement of the third seal 643 and the second bearing 632 in the rotating support portion 622, resulting in structural stability.

[0165] In this embodiment, the first seal 641, the second seal 642, and the third seal 643 are all oil seals, and the right wall of the filter cavity 610 is separately disposed from its peripheral sidewall. First, the filter mechanism 620, along with the first seal 641, the second seal 642, and the first bearing 631 on its left end, are installed as a whole into the filter cavity 610. Then, the third seal 643 and the second bearing 632 are installed on its right end. Finally, the right wall of the filter cavity 610 is fastened to its peripheral sidewall.

[0166] In this embodiment, the cross-sectional area of ​​the middle region of the filter support 623 is fixed, and its left and right ends have tapered structures, so that the local surface of the filter 625 is tilted, which is conducive to the shedding of attached lint.

[0167] In this embodiment, the orientation of the water inlet 6101 and the sewage outlet 6103 on the filter chamber 610 is perpendicular to the axis of the filter mechanism 620.

[0168] Preferably, the filter chamber 610 has a cylindrical structure, with the water inlet 6101 located near the right end of the filter chamber 610 and the sewage outlet 6103 located near the left end of the filter chamber 610, and the water inlet 6101 and the sewage outlet 6103 are symmetrical in the circumferential direction of the filter chamber 610.

[0169] In the above scheme, the water inlet 6101 is positioned as far away from the water outlet 621 as possible, so that the area of ​​the filter screen 625 can be fully utilized. The water inlet 6101 and the drain outlet 6103 are arranged vertically and staggered in the axial direction of the filter chamber 610, which is conducive to the full discharge of wastewater after cleaning the filter device 600 in the filter chamber 610.

[0170] In a further embodiment, the outer wall of the sealing support 611 is provided with a reinforcing rib 613 extending radially along the sealing support 611, and the reinforcing rib 613 is connected to the surface of the filter water outlet 6102 on the filter chamber 610.

[0171] Since the sealing support 611 extends a certain length from the left end face of the filter chamber 610, the reinforcing rib 613 provides external support to its peripheral sidewall, ensuring the strength of the sealing support 611.

[0172] In the filtration device 600 of this embodiment, the filtration mechanism 620 is supported at both ends by a first bearing 631 and a second bearing 632, respectively, ensuring smooth and stable rotation of the filtration mechanism 620 within the filtration chamber 610. Simultaneously, the first sealing member 641, the second sealing member 642, and the third sealing member 643 prevent the first bearing 631 and the second bearing 632 from contacting water, thus avoiding their failure.

[0173] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A washing machine, comprising: water container; The circulating filter pipeline has its inlet and outlet connected to the water tank, respectively. The filtration device is installed on the circulating filtration pipeline and has a water inlet, a filtered water outlet and a sewage outlet. Sewage pipes are used to receive sewage discharged from sewage outlets; The feature is that it further includes a control valve assembly, which is disposed between the water inlet end of the circulating filter pipeline and the filter device, and includes a first valve chamber and a second valve chamber that are independent of each other; the first valve chamber is connected to the water inlet of the water tank and the filter device, and the second valve chamber is connected to the sewage discharge pipeline and the sewage outlet of the filter device. The control valve assembly has a first working state in which the water tank and the water inlet are connected and the drain outlet and the drain pipe are disconnected, and a second working state in which the water tank and the water inlet are disconnected and the drain outlet and the drain pipe are connected.

2. The washing machine according to claim 1, characterized in that, The control valve assembly includes a valve body, and the valve body has two independent valve chambers formed inside it. The first valve chamber is provided with an inlet connected to the water tank and a circulating water outlet connected to the inlet; the second valve chamber is provided with a sewage inlet connected to the sewage outlet and a sewage outlet connected to the sewage pipe. The valve body is equipped with a switching mechanism. In the first working state, the switching mechanism opens the circulating water outlet and blocks the sewage inlet and / or sewage outlet. In the second working state, the switching mechanism blocks the circulating water outlet and opens the sewage inlet and sewage outlet.

3. The washing machine according to claim 2, characterized in that, The sewage outlet is normally open; in the first working state, the switching mechanism blocks the sewage inlet, and in the second working state, the switching mechanism opens the sewage inlet.

4. The washing machine according to claim 2, characterized in that, The washing machine also includes an external drain pipe for draining water to the outside, and the first valve chamber is also provided with a drain outlet connected to the external drain pipe; In the first working state, the switching mechanism blocks the drainage outlet; in the second working state, the switching mechanism opens the drainage outlet.

5. The washing machine according to claim 4, characterized in that, The switching mechanism includes: The flap is rotatably installed inside the valve body and has a first surface and a second surface facing away from each other. A drainage seal is provided on the first surface of the flap and located inside the first valve chamber, for sealing the drainage outlet; The sewage sealing element is installed on the first surface of the flap and located inside the second valve chamber, and is used to block the sewage inlet; A circulating seal is disposed on the second surface of the flap and located inside the first valve chamber, for sealing the circulating water outlet; The drain outlet and sewage inlet are located on the same side surface of the valve body; in the first working state, the drain seal and the sewage seal respectively block the drain outlet and the sewage inlet; in the second working state, the flap rotates away from the drain outlet and the sewage inlet until the circulation seal blocks the circulating water outlet.

6. The washing machine according to claim 5, characterized in that, Both the first valve chamber and the second valve chamber have a certain extension length, and their extension directions are parallel to each other. The drainage outlet is located on the end face wall of the first valve cavity along its length extension direction, and the sewage inlet is located on the end face wall of the second valve cavity in the same direction.

7. The washing machine according to claim 6, characterized in that, The water inlet is located on the other end wall of the first valve chamber, parallel to and opposite to the direction of the drain outlet; the sewage outlet is located on the other end wall of the second valve chamber, parallel to and opposite to the direction of the sewage inlet.

8. The washing machine according to claim 6, characterized in that, The orientation of the circulating water outlet is perpendicular to the orientation of the drain outlet. The control valve assembly switches from the first working state to the second working state, and the flap rotates 90° around its axis.

9. The washing machine according to claim 8, characterized in that, The circulating water outlet is located on the side wall of the first valve chamber along its length extension direction, and the side wall of the circulating water outlet is adjacent to the side wall of the second valve chamber.

10. The washing machine according to any one of claims 5-9, characterized in that, The switching mechanism also includes a drive component for driving the flap to rotate within the valve body.

11. The washing machine according to claim 10, characterized in that, The driving component includes a drive motor disposed outside the valve body.

12. The washing machine according to any one of claims 1-9, characterized in that, A circulation pump is installed between the inlet end of the circulating filter pipeline and the control valve assembly.

13. The washing machine according to claim 10, characterized in that, A circulation pump is installed between the inlet end of the circulating filter pipeline and the control valve assembly.

14. A control method for a washing machine according to any one of claims 1-13, characterized in that, When the control valve assembly switches to the first working state, the water in the water tank enters the filter device through the first valve chamber for filtration, and the filtered water returns to the water tank. The control valve assembly switches to the second working state, and the sewage in the filter device is discharged into the sewage pipe through the second valve chamber.

15. The control method for a washing machine according to claim 14, characterized in that, The washing machine also includes an external drain pipe for draining water to the outside, and the first valve chamber is provided with a circulating water outlet connected to the water inlet and a drain outlet connected to the external drain pipe. The control valve assembly switches to the first working state, opens the circulating water outlet and blocks the drain outlet, and the water in the water tank is introduced into the first valve chamber and discharged from the circulating water outlet into the filter device. The control valve assembly switches to the second working state, blocking the circulating water outlet and opening the drain outlet. Water in the water tank is introduced into the first valve chamber and discharged from the drain outlet, and then discharged from the washing machine through the external drain pipe.

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