A washing machine and a control method thereof

Abstract

The present application belongs to the technical field of washing machines, and 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 recovery device and a blowdown control valve. The water containing cylinder is connected with the circulating filtering pipeline at the water inlet end and the water outlet end. The circulating pump is arranged on the circulating filtering pipeline. The filtering device is arranged on the circulating filtering pipeline and has a blowdown outlet for discharging filtered impurities. The recovery device is connected with the blowdown outlet of the filtering device through a blowdown pipeline and is used for collecting the discharged filtered impurities. The blowdown control valve is arranged on the blowdown pipeline and is used for controlling the opening and closing of the blowdown pipeline. In the washing machine, the water in the water containing cylinder can be circulated through the filtering device under the driving of the circulating pump to reduce the content of lint in the water and improve the washing effect. The filtered impurities removed from the filtering device are discharged into the recovery device and cannot be directly discharged with the water of the washing machine, which reduces the possibility of fine lint entering the ecological cycle with the water flow and reduces the influence on the ecological environment and human health.

Description

[0001] This application is a divisional application of Chinese patent application 202110789651.3.

[0002] Original application date: July 13, 2021

[0003] Original application number: 202110789651.3

[0004] Original Invention Title: A Washing Machine and Its Control Method Technical Field

[0005] This invention belongs to the field of washing machine technology, specifically, it relates to a washing machine and its control method. Background Technology

[0006] 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, existing washing machines are equipped with lint filters that circulate the wash water through the filter during the washing process to remove the lint.

[0007] 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.

[0008] On the other hand, some filters, designed to prevent lint from clogging the filter pores, typically have larger pore sizes. However, this can result in some fine lint from clothing not being filtered out, causing it to stick to the garment and negatively impacting the user experience. Furthermore, some of this lint will be carried away by the water flow, entering the ecological cycle and ultimately affecting human health.

[0009] Due to the aforementioned problems, existing technologies have proposed self-cleaning filters. These filters use rinsing or vibration to dislodge lint and other debris from the filter, which then flows into the washing machine's drain pipe along with the rinse water and is discharged from the washing machine. However, in these solutions, the lint washed off directly enters the washing machine's drain water, thus still entering the ecological cycle and posing a threat to human health.

[0010] In view of this, the present invention is hereby proposed. Summary of the Invention

[0011] 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. The filter device in the washing machine can filter the water in the water tank, thereby reducing the lint content in the water and improving the washing effect. The filter device is connected to a recycling device through a sewage pipe, which can collect the filtered impurities discharged by the filter device, so that the filtered impurities cleaned by the filter device will not be directly discharged with the washing machine drainage, reducing the possibility of fine lint entering the ecological cycle with the water flow and reducing the impact on the ecological environment and human health.

[0012] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0013] A washing machine, comprising:

[0014] water container,

[0015] The circulating filter pipeline has its inlet and outlet connected to a water tank, and a circulating pump is installed on it.

[0016] A filtration device is installed on the circulating filtration pipeline and has a drain outlet for discharging filtered impurities.

[0017] The recovery device is connected to the drain outlet of the filter device through a drain pipe and is used to collect the discharged filter impurities.

[0018] A sewage control valve is installed on the sewage pipeline to control the opening and closing of the sewage pipeline.

[0019] Furthermore, the recycling device includes:

[0020] The shell has an internal recovery chamber;

[0021] A filter assembly is disposed within the recovery chamber, dividing the recovery chamber into a first chamber and a second chamber;

[0022] The sewage pipe is connected to the first chamber. Sewage carrying filtered impurities enters the first chamber, is filtered by the filter assembly, and then enters the second chamber. The filtered impurities are collected in the first chamber.

[0023] Furthermore, a three-way structure is provided between the water outlet of the circulation pump and the water outlet of the circulation filter pipe, and the three-way structure is connected to the external drain pipe that drains water to the outside of the washing machine.

[0024] The filtration device is located between the three-way structure and the outlet end of the circulating filtration pipeline.

[0025] Furthermore, the three-way structure includes a switching mechanism for controlling the selective connection between the filtration device and the external discharge pipeline and the outlet end of the circulating pump.

[0026] Furthermore, a return water control valve is provided between the filtration device and the outlet of the circulating filtration pipeline to control the opening and closing of the circulating filtration pipeline.

[0027] Furthermore, the filtration device includes:

[0028] A filter chamber is provided with a water inlet, a filtered water outlet and a sewage outlet, wherein the water inlet and the filtered water outlet are connected to the circulating filter pipeline.

[0029] The filtration mechanism is rotatably mounted inside the filtration chamber;

[0030] A drive mechanism drives the filter mechanism to rotate within the filter chamber.

[0031] Preferably, the direction of the filtered water outlet is parallel to the axial direction of the filtration mechanism;

[0032] More preferably, the axis of the filtration mechanism is horizontally arranged, the filtered water outlet is oriented horizontally, the water inlet is vertically upward, and the sewage outlet is vertically downward.

[0033] Alternatively, the axis of the filtration mechanism is vertically arranged, the filtered water outlet is vertically downward, and the water inlet and the sewage outlet face opposite directions and are both parallel to the horizontal direction.

[0034] Another object of the present invention is to provide a control method for the washing machine described above, which performs a sewage discharge operation, including: opening a sewage discharge control valve to open a sewage discharge pipe, and discharging sewage carrying filter impurities from the filter device into a recycling device.

[0035] Further, the circulating filtration operation is performed: the drain control valve is closed, the circulating pump is turned on, and the water in the water tank is introduced into the circulating filtration pipeline. After the impurities are removed by the filtration device, the water returns to the water tank.

[0036] Furthermore, a return water control valve is provided between the filtration device and the outlet end of the circulating filtration pipeline to control the opening and closing of the circulating filtration pipeline.

[0037] The control method also includes performing a self-cleaning operation, including: closing the return water control valve, opening the sewage control valve to connect the sewage pipeline, starting the circulation pump, introducing the water in the water tank into the filter device, cleaning the filter device, and then discharging it into the recycling device.

[0038] Preferably, the filtration device includes a filtration chamber, a filtration mechanism, and a drive mechanism, and the self-cleaning operation further includes controlling the drive mechanism to drive the filtration mechanism to rotate in the filtration chamber.

[0039] Furthermore, the self-cleaning operation and / or the sewage discharge operation are performed at least once during a complete laundry cycle.

[0040] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0041] In the washing machine of this invention, a circulation pump drives water in the water tank to flow along the circulation filter pipe. As the water passes through the filter device, lint is removed, thereby reducing the lint content in the water tank. The washing machine is equipped with a recovery device for collecting filtered impurities discharged from the filter device. After cleaning the filter device, wastewater carrying filtered impurities can be discharged into the recovery device through the drain pipe. The wastewater is then filtered by the filter components in the recovery device, and the filtered impurities are collected in the first chamber. The filtered impurities are not directly discharged with the washing machine's drainage, meaning they do not enter the ecological cycle with the drainage water, reducing the impact of fine lint entering the ecological cycle on the environment and human health.

[0042] In the washing machine of the present invention, the filter device is provided with two outlets: a filtered water outlet and a sewage outlet. These outlets are respectively connected to a water tank and a recovery device via pipelines for discharging filtered water and sewage carrying filtered impurities. Control valves are provided to control the connection between the filter device and the water tank or the recovery device, ensuring that the water entering the filter device flows out from the corresponding outlet, thereby controlling whether the filter device performs a circulating filtration operation or a self-cleaning / sewage discharge operation.

[0043] In the washing machine of the present invention, a three-way structure connecting the circulating pump and the filter device is provided on the circulating filter pipeline, and the switching mechanism in the three-way structure controls the filter device and the external discharge pipeline to selectively connect to the circulating pump. The washing machine does not need to set up two independent water circuits for circulating filtration and drainage respectively. At the same time, the two functions of circulating and filtering washing water and draining water can be realized by a single circulating pump, which simplifies the internal water circuit structure of the washing machine and saves space.

[0044] In the washing machine of the present invention, the filter mechanism in the filter device can rotate in the filter cavity under the drive of the drive mechanism. The filter impurities attached to the outer surface of the filter mechanism can be peeled off from the filter mechanism under the centrifugal force generated by the rotation and the impact force of the water flow stirred in the filter cavity, thereby realizing the self-cleaning function of the filter device and the high efficiency of removing filter impurities.

[0045] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0046] 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:

[0047] Figure 1 This is a schematic diagram of the structure of the washing machine in an embodiment of the present invention;

[0048] Figure 2 This is the present invention. Figure 1 Enlarged view of point A in the middle;

[0049] Figure 3 This is a schematic diagram of the washing machine performing a self-cleaning operation in Embodiment 1 of the present invention;

[0050] Figure 4 This is a schematic diagram of the washing machine performing a sewage discharge operation in Embodiment 1 of the present invention;

[0051] Figure 5 This is the present invention. Figure 4 Enlarged view of point B in the middle;

[0052] Figure 6 This is a schematic diagram of the structure of the washing machine in Embodiment 2 of the present invention;

[0053] Figure 7 This is a schematic diagram of the structure of the filtration device in an embodiment of the present invention;

[0054] Figure 8 This is the present invention. Figure 7 Schematic diagram of the C-section

[0055] Figure 9 This is a schematic diagram of the cleaning filter device of the washing machine after the intermediate rinse in Embodiment 4 of the present invention;

[0056] Figure 10 This is a schematic diagram of the first stage of cleaning the filter device after the final rinse in the washing machine according to Embodiment 4 of the present invention;

[0057] Figure 11 This is a schematic diagram of the second stage of cleaning the filter device after the final rinse in the washing machine according to Embodiment 4 of the present invention;

[0058] Figure 12 This is a schematic diagram of the third stage of cleaning the filter device after the final rinse in the washing machine according to Embodiment 4 of the present invention.

[0059] In the diagram: 100, water tank; 110, window gasket; 210, drain pipe; 220, circulation pipe; 230, return water pipe; 231, return water control valve; 240, sewage pipe; 241, sewage control valve; 250, external discharge pipe; 260, water tank drain pipe; 270, switching device; 400, circulation pump; 500, recovery device; 501, filter impurities; 510, housing; 520, filter assembly; 531, first chamber; 532, second chamber;

[0060] 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.

[0061] 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

[0062] 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.

[0063] In the description of this invention, it should be noted that the terms "upper", "lower", "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 limitations on this invention.

[0064] 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.

[0065] Example 1

[0066] like Figures 1 to 5 As shown, the washing machine described in this embodiment includes:

[0067] Water container 100,

[0068] The circulating filter pipeline has its inlet and outlet connected to the water tank 100, and a circulating pump 400 is installed on it.

[0069] The filter device 600 is installed on the circulating filter pipeline and has a drain port 6103 for discharging filtered impurities 501.

[0070] The recovery device 500 is connected to the drain outlet 6103 of the filter device 600 through the drain pipe 240, and is used to collect the discharged filter impurities 501.

[0071] The sewage control valve 241 is installed on the sewage pipeline 240 and is used to control the opening and closing of the sewage pipeline 240.

[0072] In this embodiment, the water tank 100 is connected to the circulating filter pipeline to form a circulating filter loop. The washing water in the water tank 100 is driven by the circulating pump 400 into the circulating filter pipeline, where it passes through the filter device 600 to remove lint and other impurities 501, and then returns to the water tank 100. During the washing process, the washing water is continuously circulated through the filter device 600 by the circulating pump 400, reducing the lint content in the washing water and thus improving the washing effect of the clothes.

[0073] The filter device 600 is equipped with a drain outlet 6103. Filtered impurities 501 remaining in the filter device 600 after filtration can be discharged through the drain outlet 6103, eliminating the need for manual cleaning by the user and making it more convenient. The washing machine is equipped with a recycling device 500, which is connected to the drain outlet 6103 via a drain pipe 240. Filtered impurities 501 are collected in the recycling device 500 through the drain pipe 240, preventing them from entering the drain water flow and being discharged from the washing machine. This method prevents fine lint from the filtered impurities 501 from being carried away by the water flow and entering the ecological cycle, thus avoiding harm to the ecological environment and human health.

[0074] A drain control valve 241 is also installed on the drain pipe 240. When the washing water is circulating in the circulating filter circuit for filtration, the drain control valve 241 is closed to disconnect the connection between the drain port 6103 and the recovery device 500, so as to ensure that the washing water continuously circulates along the circulating filter pipe, that is, the washing water entering the filter device 600 will not flow out of the drain port 6103 and into the recovery device 500.

[0075] In a further embodiment, the recycling device 500 specifically includes:

[0076] The housing 510 has a recovery chamber inside;

[0077] A filter assembly 520 is disposed in the recovery chamber, dividing the recovery chamber into a first chamber 531 and a second chamber 532.

[0078] The sewage pipe 240 is connected to the first chamber 531. Sewage carrying the filtered impurities 501 enters the first chamber 531, and after being filtered by the filter assembly 520, it enters the second chamber 532. The filtered impurities 501 are collected in the first chamber 531.

[0079] 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 wastewater carrying 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. The housing 510 is insertable / removable and mounted on the washing machine, with an opening on the upper side, allowing the user to remove the housing 510 from the washing machine to clean the filtered impurities 501 adhering to the upper surface of the filter assembly 520.

[0080] Preferably, the second chamber 532 can be connected to the main water inlet pipe of the washing machine via a pipe, so that the clean water after filtering out the impurities 501 can be introduced into the water tank 100 for reuse. Alternatively, the second chamber 532 can be connected to the drain pipe of the washing machine via a pipe, so that the water after filtering out the impurities 501 can be included in the drain flow of the washing machine and discharged together. Since the impurities 501 have been removed when passing through the filter assembly 520, there is no situation where the impurities 501, especially the fine lint, are discharged with the drain flow, thereby avoiding the problem of fine lint being mixed into the ecological cycle.

[0081] In this embodiment, a three-way structure is provided between the water outlet of the circulation pump 400 and the water outlet of the circulation filter pipe, and the three-way structure is connected to the external drainage pipe 250 that drains water to the outside of the washing machine.

[0082] The filter device 600 is located between the three-way structure and the outlet end of the circulating filter pipe.

[0083] Furthermore, the three-way structure is a switching device 270 that controls the connection between the filter device 600 and the external discharge pipe 250 and the outlet end of the circulation pump 400, comprising:

[0084] The inlet is connected to the outlet of the circulating pump 400;

[0085] The first water outlet is connected to the filter device 600;

[0086] The second outlet is connected to the external drainage pipe 250.

[0087] The switching mechanism controls the first and second water outlets to connect with the water inlet.

[0088] Specifically, the circulating filtration pipeline includes:

[0089] The drain pipe 260 of the water tank connects the water tank 100 to the inlet of the circulating pump 400;

[0090] 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 of the switching device 270.

[0091] The circulation pipeline 220 is connected at one end to the first outlet of the switching device 270 and at the other end to the inlet 6101 of the filter device 600.

[0092] 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.

[0093] The inlet of the external drain pipe 250 is connected to the second outlet of the switching device 270, and the outlet extends to the outside of the washing machine.

[0094] In detail, the filter device 600 is located above the water tank 100, and the circulation pipe 220 and the return water pipe 230 are also located above the water tank 100. The outlet end of the return water pipe 230 is connected to the window gasket 110, thereby achieving communication with the water tank 100. The circulation pump 400 is located below the water tank 100 and is connected to the water tank 100 through the water tank drain pipe 260. The drain pipe 210 transports washing water from bottom to top under the action of the circulation pump 400.

[0095] In the above scheme, by setting the switching device 270, the filter device 600 and the external discharge pipe 250 are selectively connected to the circulation pump 400. For example... Figure 1 As shown, at this time, the switching mechanism connects the inlet and the first outlet, that is, the circulation pump 400 and the filter device 600 are connected. Under the action of the circulation pump 400, the washing water flows along the circulation filter pipeline and is filtered by the filter device 600. Figure 4 As shown, at this time, the switching mechanism connects the water inlet and the second water outlet, that is, the circulation pump 400 is connected to the external drain pipe 250. Under the action of the circulation pump 400, the washing water in the water tank 100 is drawn out through the water tank drain pipe 260, and then through the drain pipe 210, and finally delivered to the external drain pipe 250 to be discharged from the washing machine.

[0096] With the above configuration, the washing machine does not need two independent water paths for circulating, filtering, and draining the washing water, nor does it require separate drain and circulation pumps. By simply switching the connection between the pipes using the switching device 270, both draining and circulating / filtering the washing water can be achieved using a single circulation pump 400. This simplifies the internal piping structure of the washing machine, saves space occupied by the piping, and reduces production costs by using only one circulation pump 400.

[0097] In a further embodiment, a return water control valve 231 is provided between the filter device 600 and the outlet end of the circulating filter pipe, i.e., on the return water pipe 230, to control the opening and closing of the return water pipe 230, thereby realizing the control of the opening and closing of the circulating filter pipe.

[0098] In the above scheme, when the washing water in the water tank 100 is circulated and filtered, under the action of the circulation pump 400, the washing water passes sequentially through the water tank drain pipe 260, drain pipe 210, circulation pipe 220, and filter device 600, and finally returns to the water tank 100 through the return water pipe 230. When it is necessary to remove the filter impurities 501 remaining in the filter device 600, the return water control valve 231 closes to disconnect the connection between the filter water outlet 6102 and the water tank 100, and the washing water cannot flow out from the filter water outlet 6102. At the same time, the drain control valve 241 opens to connect the drain pipe 240, which can ensure that all the washing water entering the filter device 600 flows out from the drain port 6103, and fully carries away the filter impurities 501 from the filter device 600.

[0099] In this embodiment, the filtration device 600 includes:

[0100] A filter chamber 610 is provided with a water inlet 6101, a filtered water outlet 6102 and a sewage outlet 6103. The water inlet 6101 and the filtered water outlet 6102 are connected to the circulating filter pipeline.

[0101] The filter mechanism 620 is rotatably disposed within the filter chamber 610;

[0102] The drive mechanism 660 drives the filter mechanism 620 to rotate within the filter chamber 610.

[0103] Specifically, such as Figure 7 and Figure 8 As shown, the filtration mechanism 620 includes a filter screen support and a filter screen 625. The filter screen support specifically includes:

[0104] The filter support 623 is located inside the filter cavity 610, and the filter 625 covers the surface of the filter support 623, thereby dividing the interior of the filter cavity 610 into an outer cavity and an inner cavity.

[0105] The water outlet connector 621 is connected to the internal cavity.

[0106] During the circulating filtration of washing water, the washing water to be filtered is transported to the filtration device 600 and enters the outer cavity inside the filtration chamber 610 through the inlet 6101. As it passes through the filtration mechanism 620, impurities 501 in the washing water are blocked by the filter screen 625 and adhere to its surface, ensuring that the washing water entering the inner cavity no longer contains lint or other impurities 501. The filtered clean washing water then flows out of the filtration chamber 610 through the outlet 621 and finally through the filtered water outlet 6102.

[0107] When the filter device 600 needs to be cleaned, the filter mechanism 620 is driven to rotate in the filter chamber 610 by the drive mechanism 660, such as a motor. This agitates the water remaining in the filter chamber 610, causing the filter impurities 501 on the surface of the filter screen 625 to be peeled off from the filter screen 625 under the action of centrifugal force and turbulent water flow. The impurities are then dissolved into the water in the filter chamber 610 and discharged from the filter chamber 6103, where they are collected by the recycling device 500.

[0108] In a preferred embodiment, the orientation of the filtered water outlet 6102 is parallel to the axial direction of the filtration mechanism 620.

[0109] Specifically, the water outlet connector 621 is located at the left end of the filter screen support 623, and its axis coincides with the axis of the filter mechanism 620. The water outlet connector 621 is rotatably and sealed to the filtered water outlet 6102.

[0110] In this embodiment, the axis of the filter mechanism 620 is horizontally arranged, the filtered water outlet 6102 faces horizontally, the water inlet 6101 is vertically upward, and the drain outlet 6103 is vertically downward. The washing water to be filtered, as well as the cleaning water used to rinse the filter mechanism 620, both enter from the top of the filter chamber 610, and the water flows smoothly out from the filtered water outlet 6102 or the drain outlet 6103 under its own gravity. The drain outlet 6103 is located at the bottom of the filter chamber 610, discharging wastewater carrying filtered impurities 501 downward. Since the filtered impurities 501 tend to collect at the bottom of the filter chamber 610 after being peeled off from the filter screen 625, this facilitates the full discharge of the filtered impurities 501.

[0111] This embodiment also provides a control method for the washing machine described above, which performs a circulating filtration operation, a self-cleaning operation, and a sewage discharge operation respectively during the washing program of the washing machine.

[0112] Specifically, such as Figure 1 and Figure 2 As shown, the circulating filtration operation includes: closing the sewage control valve 241 and simultaneously opening the return water control valve 231 to connect the return water pipeline 230; starting the circulating pump 400 to introduce the water in the water tank 100 into the circulating filtration pipeline, and after the filter device 600 removes the filtered impurities, the water returns to the water tank 100.

[0113] like Figure 3 As shown, the self-cleaning operation includes: closing the return water control valve 231, opening the drain control valve 241 to connect the drain pipe 240, starting the circulation pump 400, introducing water from the water tank 100 into the filter device 600, cleaning the filter device 600, and then discharging it into the recovery device 500. It also includes: controlling the drive mechanism 660 to drive the filter mechanism 620 to rotate within the filter chamber 610.

[0114] like Figure 4 As shown, the sewage discharge operation includes: opening the sewage discharge control valve 241 to connect the sewage discharge pipeline 240, discharging the sewage carrying the filtered impurities 501 from the filter device 600 into the recovery device 500. During the sewage discharge operation, the drive mechanism 660 can be activated to rotate the filter mechanism 620, or the drive mechanism 660 can be deactivated, keeping the filter mechanism 620 stationary within the filter chamber 610.

[0115] In this embodiment, the cyclic filtration operation is performed during the washing phase and one or more rinsing phases of the washing program, and the self-cleaning operation and / or sewage discharge operation are performed at least once in a complete washing program. Preferably, the self-cleaning operation and sewage discharge operation are performed at the end of the washing phase and each rinsing phase.

[0116] Specifically, after a certain period of water intake during the washing and rinsing stages, the circulation pump 400 is activated to begin the circulation filtration operation. This circulation filtration operation continues until the washing or rinsing stage is nearing completion and drainage is imminent. At this point, the return water control valve 231 is closed, the drain control valve 241 is opened, and the drive mechanism 660 is activated to perform a self-cleaning operation. After the self-cleaning operation continues for a certain period, the washing machine then performs a drain operation.

[0117] In detail, after the washing machine starts filling with water, it detects the water level in the water tank 100. When the water level reaches the preset level, the circulation pump 400 is turned on to begin the circulation and filtration operation. This prevents the circulation pump 400 from drawing in air and generating operating noise if the water level in the water tank 100 is too low. While the washing machine is performing the sewage discharge operation, it also controls the switching device 270 to connect the drain pipe 210 and the external drain pipe 250, allowing the circulation pump 400 to continue running and drain the remaining water from the water tank 100.

[0118] In this embodiment, the washing machine is equipped with a filter device 600, which circulates and filters the water in the water tank 100 during washing machine operation, reducing the content of lint in the water and improving the washing effect. The filter device 600 is self-cleaning, thereby discharging the filtered impurities 501 remaining inside the filter device 600 without requiring the user to remove the filter device 600 from the washing machine for manual cleaning, making it convenient to use. A recycling device 500 is provided in the washing machine and is connected to the filter device 600 to collect the filtered impurities 501 discharged by the filter device 600. This prevents the filtered impurities 501 from mixing with the washing machine's drain water and being directly discharged into the washing machine, thus entering the ecological cycle and avoiding the harm to the ecological environment and human health caused by the fine lint in the filtered impurities 501.

[0119] Example 2

[0120] like Figure 6 As shown, the difference between this embodiment and the first embodiment above is that the axis of the filtering mechanism is set vertically.

[0121] Specifically, the filtered water outlet 6102 on the filter chamber 610 is vertically downward, and the water inlet 6101 and the drain outlet 6103 face opposite directions and are both parallel to the horizontal direction. Preferably, the water inlet 6101 is positioned higher than the drain outlet 6103, which can fully discharge the filtered impurities remaining in the filter device 600 and prevent the residual filtered impurities from breeding bacteria in the filter device 600 and contaminating the washing water.

[0122] In this embodiment, the other structures and control methods of the washing machine are the same as in Embodiment 1, and have similar effects as in Embodiment 1.

[0123] Example 3

[0124] like Figure 7 and Figure 8 As shown, this embodiment provides a filtration device 600 applied in Embodiment 1 or 2 above.

[0125] Specifically, the filtration device 600 includes:

[0126] The filter chamber 610 has a water inlet 6101 and a filtered water outlet 6102. The outer periphery of the filtered water outlet 6102 extends outward from the filter chamber 610 to form a sealing support part 611.

[0127] The filter mechanism 620 is rotatably disposed inside the filter chamber 610, and one end has a water outlet connector 621 inserted into the sealing support part 611. The water outlet connector 621 is rotatably and sealingly connected to the sealing support part 611.

[0128] The first bearing 631 is sleeved on the water outlet connector 621;

[0129] The first seal 641 is disposed on the side of the first bearing 631 facing the inside of the filter chamber 610, and seals the gap between the water outlet connector 621 and the sealing support 611.

[0130] In detail, the filtration mechanism 620 includes a filter screen support and a filter screen 625, wherein the filter screen support includes:

[0131] The filter support 623 is located inside the filter chamber 610, and the filter 625 covers the surface of the filter support 623.

[0132] 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.

[0133] 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.

[0134] 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.

[0135] 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.

[0136] 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.

[0137] 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.

[0138] In the above design, a second seal 642 is also provided on the left side of the first bearing 631. 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, avoiding rusting of the first bearing 631 when it comes into contact with water, and preventing it from affecting the smooth rotation of the filter mechanism 620.

[0139] 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.

[0140] 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.

[0141] 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.

[0142] 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.

[0143] 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.

[0144] 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.

[0145] 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.

[0146] In the above solution, 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 pipeline through the connecting part 651 on the filter chamber flange 650 to realize the export of filtered washing water free of lint. Compared with the method of directly connecting the pipeline to the left end of the sealing support 611, the installation is easier.

[0147] 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.

[0148] 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 is rotatably and sealingly connected to the mounting port 6104.

[0149] In this embodiment, the filter mechanism 620 is driven to rotate by the drive mechanism, which is located outside the filter chamber 610 to avoid contact with the washing water. Therefore, 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 connection to the drive mechanism, such as a motor.

[0150] 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.

[0151] 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.

[0152] 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.

[0153] 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.

[0154] 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.

[0155] 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.

[0156] 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.

[0157] 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.

[0158] 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.

[0159] 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.

[0160] 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.

[0161] 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.

[0162] 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.

[0163] In this embodiment, a rotatable filter mechanism 620 is provided inside the filter chamber 610 of the filter device 600. After the washing water to be filtered enters the filter chamber 610, the water that has been filtered to remove lint enters the filter mechanism 620 and flows out through the water outlet 621. The filtered lint adheres to the outer surface of the filter mechanism 620. By driving the filter mechanism 620 to rotate, the lint can be detached and discharged with the water in the filter chamber 610 through the drain port 6103, realizing the self-cleaning function of the filter device 600, eliminating the need for manual cleaning by the user.

[0164] The filter mechanism 620 is supported at both ends by a first bearing 631 and a second bearing 632, ensuring smooth and stable rotation of the filter mechanism 620 within the filter chamber 610. Simultaneously, the first seal 641, the second seal 642, and the third seal 643 prevent the first bearing 631 and the second bearing 632 from contacting water, thus avoiding their failure.

[0165] Example 4

[0166] like Figure 1 and Figure 2 As shown, this embodiment provides a control method for a washing machine as described in Embodiment 1 above, used to fully discharge sewage from the filter device 600.

[0167] Specifically, the control method includes:

[0168] Turn on the circulation pump 400, open the circulation filter pipe, and the washing machine will perform circulation filtration and rinsing.

[0169] After rinsing is complete, turn off the circulation pump at 400.

[0170] Turn on the drive mechanism 660 to drive the filter mechanism 620 to rotate inside the filter chamber 610;

[0171] When the first set condition is met, start the circulation pump 400 and at the same time open the sewage control valve 241 to open the sewage pipe 240.

[0172] Once the second set condition is met, the circulating filter pipeline will be shut off.

[0173] Preferably, after the first set condition is met, the drive mechanism 660 remains open, driving the filter mechanism 620 to rotate continuously.

[0174] In this embodiment, the circulating filtration pipeline includes: a switching device 270 connecting the outlet of the filtration device 600 and the circulating pump 400, and opening the return water control valve 231 to connect the return water pipeline 230. The circulating filtration pipeline is cut off by: the switching device 270 connecting the external discharge pipeline 250 and the outlet of the circulating pump 400.

[0175] It is understandable that the aforementioned disconnection of the circulating filter pipeline can also be achieved by shutting down the circulating pump 400.

[0176] In the above scheme, the washing machine circulates and filters the rinsing water during the rinsing process, and the filtration device 600 and the circulating filtration pipeline are always filled with rinsing water.

[0177] like Figure 10As shown, after rinsing is completed and the circulation pump 400 is turned off, the water in the drain pipe 210 and the circulation pipe 220 flows back downwards under gravity, up to the point where the water level in the drain pipe 210 is level with the water level in the water tank 100. The pipes above the water level up to the filter device 600 are filled with air. However, the filter device 600 is lower than the circulation pipe 220, so the water in it will not flow back through the circulation pipe 220. The return water control valve 231 is also closed when the circulation pump 400 is turned off, and the drain control valve 241 is also closed at this time. The water inside the filter device 600 remains in the filter chamber 610 and will not be discharged.

[0178] like Figure 11 As shown, after the drive mechanism 660 is turned on, it drives the filter mechanism 620 to rotate at high speed, causing the lint and other filter impurities attached to the surface to be peeled off from the surface of the filter mechanism 620 under the action of centrifugal force. At this time, since both the return water control valve 231 and the drain control valve 241 are in the closed state, the water in the filter chamber 610 does not flow out. The high-speed rotating filter mechanism 620 can also agitate the water flow in the filter chamber 610. The resulting turbulent water flow exerts a certain impact force on the surface of the filter mechanism 620, which can also cause the lint to fall off. The lint peeled off from the surface of the filter mechanism 620 is absorbed into the water in the filter chamber 610.

[0179] like Figure 12 As shown, when the circulation pump 400 is turned on, the drain control valve 241 is also opened, opening the drain pipe 240 so that the wastewater in the filter device 600 can be discharged from the drain port 6103. The opening of the circulation pump 400 forces air from the drain pipe 210 and circulation pipe 220 into the filter device 600, thereby completely discharging the wastewater carrying lint from the filter device 600 through the drain port 6103 under air pressure, preventing wastewater residue in the filter device 600 and ensuring a good cleaning effect. The drain control valve 241 opens simultaneously with the circulation pump 400, ensuring the pressure generated when air enters the filter device 600, thus ensuring the full discharge of wastewater from the filter device 600.

[0180] To prevent water from the water tank 100 from re-entering the filter device 600 through the circulation pipe 220 after the wastewater in the filter device 600 has been drained, the washing machine has a preset second setting condition. When the second setting condition is met, the circulation filter pipe is cut off, and the water in the water tank 100 is stopped from being transported to the filter device 600.

[0181] In the specific scheme of this embodiment, the first setting condition can be that the circulation pump 400 is turned off for a first set time t1, and the second setting condition can be that the circulation pump 400 is turned on for a second set time t2.

[0182] In the above solution, the specific values of the first set time t1 and the second set time t2 can be obtained through a large number of experiments in advance and directly written into the control program of the washing machine.

[0183] Specifically, the value of the first set time t1 is approximately the maximum duration required for the water level in the drain pipe 210 to start dropping until it stops, and the value of the second set time t2 is approximately the shortest duration required for the water level in the drain pipe 210 to rise close to the top of the drain pipe 210 after the circulation pump 400 is turned on. In this way, it can be ensured that during the period when the circulation pump 400 is turned off, a larger amount of air can enter the pipeline, and at the same time, it can effectively avoid the situation where water enters the filtering device 600 after the circulation pump 400 is turned on.

[0184] In another solution of this embodiment, the water level height can also be used as the first set condition and the second set condition. Specifically, the first set condition is that the water level in the pipeline between the circulation pump 400 and the filtering device 600 reaches the first set value H1. The second set condition is that the water level in the pipeline between the circulation pump 400 and the filtering device 600 reaches the second set value H2. Among them, H1 < H2.

[0185] In this embodiment, the above water level specifically refers to the water level height in the drain pipe 210, and a water level detection device can be set in the drain pipe 210 of the washing machine to detect the water level in the drain pipe 210.

[0186] In the above solution, the value of the first set value H1 is greater than and as close as possible to the maximum water level height of the washing machine to ensure that after the circulation pump 400 is turned off, the water level in the drain pipe 210 can drop to reach the first set value H1.

[0187] From the time when the washing machine receives the signal that the water level in the drain pipe 210 has risen to the second set value H2 until the switching device 270 conducts between the drain pipe 210 and the external drain pipe 250, there is generally a certain time difference. To avoid water entering the filtering device 600 after the circulation pump 400 is turned on due to response delay, a certain difference ΔH is required between the value of the second set value H2 and the water level height corresponding to the top of the drain pipe 210. The specific value of the difference ΔH can be obtained through a large number of experiments carried out in advance, so as to ensure that after the washing machine receives the signal that the water level reaches the second set value H2, it has enough response time to control the switching device 270 to complete the switching of the water circuit.

[0188] In a further solution of this embodiment, if the washing machine determines that the current running process is the last rinsing stage in the current washing program, then the circulation pump 400 is turned off after the rinsing is completed, and the circulation pump 400 is turned on after the first set condition is reached.

[0189] If the washing machine determines that the current running process is not the last rinsing stage of this washing program, it will perform the following operations after the rinsing is completed:

[0190] Circulating pump 400 remains in operation;

[0191] Once the third set condition is met, the circulating filter pipeline will be shut off.

[0192] In the above scheme, during the intermediate rinsing stage, since the washing machine will continue to run afterward, that is, the rinsing water will circulate through the filter device 600 for filtration. At this time, it is not necessary to drain the wastewater carrying lint from the filter device 600. It is only necessary to remove the lint attached to the surface of the filter mechanism 620.

[0193] like Figure 9 As shown, after rinsing, the return water control valve 231 is closed, the drain control valve 241 is opened, the circulation pump 400 remains running, and the water in the water tank 100 continues to be transported to the filter device 600 under the action of the circulation pump 400 to rinse the inside of the filter device 600. The rinsed wastewater is discharged into the drain pipe 240 through the drain outlet 6103.

[0194] In this embodiment, the third setting condition can be the completion of rinsing and the arrival of a third preset time t3. Its value is obtained in advance through experiments and written into the control program to ensure that the lint attached to the surface of the filter mechanism 620 can be basically removed.

[0195] Alternatively, when the water level in the water tank 100 drops to a preset value ΔH1, the circulation filter pipe can be cut off. That is, the control switching device 270 connects the drain pipe 210 and the external discharge pipe 250, and the circulation pump 400 continues to run, draining the remaining water in the water tank 100 from the washing machine.

[0196] In the preferred embodiment, after rinsing, the drive mechanism 660 is turned on, driving the filter mechanism 620 to rotate at high speed in the filter chamber 610. This agitates the water in the filter chamber 610, causing the attached lint to peel off from the surface of the filter mechanism 620 under the combined action of centrifugal force and turbulent water flow. The lint is then dissolved in the water in the filter chamber 610 and discharged from the filter chamber 6103. This method results in high efficiency in cleaning lint.

[0197] In this embodiment, the washing machine only performs the operation of first turning off the circulation pump 400 and then turning it on again at the end of the final rinse cycle to completely drain the wastewater from the filter device 600. At the end of the intermediate rinse cycle, the circulation pump 400 remains running, avoiding frequent turning on and off of the circulation pump 400 during washing machine operation, which would affect its service life.

[0198] In this embodiment, the washing machine also cleans the filter device 600 after the washing cycle is completed. The specific control method is as follows:

[0199] Turn on the circulation pump 400, switch the device 270 to connect the water outlet of the circulation pump 400 with the filter device 600, open the return water control valve 231, and the washing machine will perform circulation filtration and washing.

[0200] After washing is finished, the circulation pump 400 remains running, the return water control valve 231 is closed, and the drain control valve 241 is opened;

[0201] When the fourth set condition is met, the switching device 270 connects the outlet of the circulation pump 400 to the external discharge pipe 250.

[0202] The fourth setting condition can be either the completion of washing at a fourth preset time t4, or the water level in the water tank 100 dropping to a preset value ΔH2.

[0203] Since a circulating filter rinse is required in the subsequent washing process after the washing is finished, similar to the intermediate rinse, it is not necessary to completely drain the wastewater in the filter device 600. The circulation pump 400 can remain running and does not need to be turned off.

[0204] In this embodiment, after the washing and intermediate rinsing cycles are completed, the washing machine keeps the circulation pump 400 running, delivering water from the water tank 100 to the filter device 600 for rinsing. The rinsed wastewater is discharged from the drain port 6103 of the filter device 600. After the final rinse, the circulation pump 400 is first turned off, and air is allowed to enter the pipeline before the circulation pump 400 is turned on again to force the air into the filter device 600, thereby completely draining the wastewater and ensuring that there is no wastewater residue in the filter device 600 after the washing machine stops running, effectively preventing bacterial growth. Furthermore, the washing machine only performs the operation of turning the circulation pump 400 off and on again after the final rinse, reducing unnecessary on / off operations of the circulation pump 400 and extending its service life.

[0205] 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 a filter device, the filter device including a filter chamber and a filter mechanism rotatably disposed inside the filter chamber, characterized in that... The filtration device is installed on a circulating filtration pipeline that is connected to the water tank of the washing machine at the inlet and outlet ends respectively. A circulating pump is provided between the inlet end of the circulating filtration pipeline and the filtration device. The filtration chamber is provided with a drain outlet for discharging wastewater carrying filtered impurities. The drain outlet is connected to a drain pipeline, and a drain control valve is provided on the drain pipeline. The filter device is located above the water tank. During the rinsing process, the washing machine turns on the circulation pump to perform circulating filtration and rinsing. After rinsing, the circulation pump is turned off, and the drain control valve is closed. The water in the drain pipe and circulation pipe of the circulating filter pipe flows downward under the action of gravity. When the first set condition is reached, the circulation pump is turned on and the drain control valve is opened at the same time. The turning on of the circulation pump forces the air in the drain pipe and circulation pipe into the filter device, so that the sewage carrying lint in the filter device is completely discharged from the drain port under air pressure. During the process of the filter device discharging sewage, the filter mechanism is controlled to rotate in the filter chamber. The first setting condition is: the water level in the pipeline between the circulation pump and the filter device reaches a first setting value H1; or, the first setting condition is that the circulation pump is shut down for a first setting time t1.

2. The washing machine according to claim 1, characterized in that, The filtration device also includes a drive mechanism for driving the filtration mechanism to rotate within the filtration chamber. After rinsing is completed and the circulation pump is turned off, the drive mechanism is turned on to drive the filter mechanism to rotate in the filter chamber; after the first set condition is met and the circulation pump is turned on, the drive mechanism remains on and drives the filter mechanism to rotate continuously.

3. The washing machine according to claim 1, characterized in that, The washing machine includes a recycling device, which is connected to the drain outlet of the filter chamber via a drain pipe; the filter device also includes a drive mechanism for driving the filter mechanism to rotate within the filter chamber.

4. The washing machine according to claim 3, characterized in that, When the washing machine performs a self-cleaning operation, it controls the drive mechanism to rotate the filter mechanism in the filter chamber, controls the drain pipe to open, and allows the water introduced into the filter device to clean the filter device before being discharged into the recycling device. When the washing machine performs a sewage discharge operation, it controls the sewage discharge pipe to be open and controls the drive mechanism to drive the filter mechanism to rotate in the filter chamber; or, when the washing machine performs a sewage discharge operation, it controls the sewage discharge pipe to be open and does not turn on the drive mechanism, so that the filter mechanism remains stationary in the filter chamber. After the self-cleaning operation continues for a certain period of time, the washing machine will then perform a sewage discharge operation.

5. The washing machine according to claim 3, characterized in that, The recycling device has a filtration assembly installed in its recycling chamber, which divides the recycling chamber into a first chamber and a second chamber. Wastewater carrying filter impurities enters the first chamber, is filtered by the filtration assembly, and then enters the second chamber. The filter impurities are collected in the first chamber. The clean water in the second chamber, after the filter impurities have been removed, is introduced into the water tank of the washing machine.

6. The washing machine according to claim 1, characterized in that, When the washing machine controls the drain control valve to remain open to connect the drain pipe, it controls the filter mechanism to rotate within the filter chamber.

7. The washing machine according to claim 6, characterized in that, The filtered water outlet of the filter device is connected to the return water pipe, and the other end of the return water pipe is connected to the water tank of the washing machine; a return water control valve is installed on the return water pipe. When the sewage control valve is opened to connect the sewage pipeline, the return water control valve is closed, disconnecting the connection between the filtered water outlet and the water tank.

8. The washing machine according to any one of claims 1-7, characterized in that, The outlet of the circulating pump is connected to the inlet of the filter device via the drain pipe and the circulating pipe of the circulating filter pipeline in sequence; the water in the water tank is transported from bottom to top along the drain pipe; the filter device is lower than the circulating pipe. After rinsing is completed and the circulation pump is turned off, the water inside the filter device remains in the filter chamber.

9. The washing machine according to claim 8, characterized in that, After the first set condition is met, if the second set condition is met, the circulating filter pipeline is cut off, and the water in the water tank is stopped from being delivered to the filter device. The second setting condition is: the water level in the pipeline between the circulation pump and the filter device reaches the second setting value H2, where H1 < H2; or, the second setting condition is that the circulation pump is turned on for a second setting time t2.

10. The washing machine according to any one of claims 1-7, characterized in that, The outer periphery of the filtered water outlet of the filter chamber extends outward to form a sealing support portion; one end of the filter mechanism has a water outlet connector inserted into the sealing support portion, and the water outlet connector is rotatably and sealingly connected to the sealing support portion. The water outlet connector is fitted with a first bearing, a first seal, and a second seal. The first seal is located on the side of the first bearing facing the interior of the filter chamber, and the second seal is located on the side of the first bearing facing away from the interior of the filter chamber.

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