Control method of a washing machine and washing machine

Abstract

The application discloses a control method of a washing machine and the washing machine. The washing machine comprises a water containing drum, a circulating filtering pipeline, a filtering device, and a sewage pipeline. The water inlet end and the water outlet end of the circulating filtering pipeline are communicated with the water containing drum, and the circulating pump is arranged on the circulating filtering pipeline. The filtering device is arranged between the circulating pump and the water outlet end of the circulating filtering pipeline, and has a sewage outlet for discharging sewage outward. The sewage pipeline is connected with the sewage outlet of the filtering device. The washing machine alternately performs the following operations during the washing / rinsing process: a circulating filtering operation, the sewage outlet of the filtering device is closed and / or the sewage pipeline is cut off, the circulating pump operates, and the water in the water containing drum is subjected to the circulating filtering; and a sewage discharge operation, the sewage outlet of the filtering device is opened and / or the sewage pipeline is turned on, the circulating pump operates, and the sewage in the filtering device is driven to flow into the sewage pipeline. The washing machine of the application alternately performs the circulating filtering operation and the sewage discharge operation, and provides the power for the filtering device to discharge the sewage through the circulating pump, so that the filtering impurities in the filtering device can be timely and sufficiently discharged.

Description

Technical Field

[0001] This invention belongs to the field of laundry equipment, specifically, it relates to a control method for a washing machine and a washing machine. 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, which can automatically clean internal filter debris such as lint after the filtration process is completed and discharge the cleaned-off filter debris through water flow. However, due to the limited internal space of the washing machine, the drainage path for wastewater to be discharged from the filter device is relatively long and may have a certain height difference, making it difficult for wastewater to be fully discharged from the filter device without the aid of driving force. This leads to the continuous accumulation of filter debris in the filter device, and the problem of bacterial growth still exists after long-term use.

[0005] On the other hand, most washing machines only clean the filter and discharge wastewater after the washing or rinsing stage, or even after a complete washing cycle. When the water contains a high amount of lint, these impurities may clog the filter screen, affecting its filtration efficiency. In severe cases, the filter may become blocked, preventing the filtration cycle from continuing and negatively impacting the user experience.

[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 control method and washing machine for a washing machine that uses a circulating pump to drive a filter device to discharge sewage and can discharge sewage multiple times during the washing / rinsing process.

[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 method for controlling a washing machine, the washing machine comprising:

[0010] water container;

[0011] The circulating filter pipeline has its inlet and outlet connected to a water tank, and a circulating pump is installed on it.

[0012] The filtration device is installed between the outlet of the circulating pump and the circulating filter pipeline, and has a drain outlet for discharging wastewater.

[0013] The sewage pipe is connected to the sewage outlet of the filter device;

[0014] The washing machine alternates between washing and rinsing processes:

[0015] In the circulating filtration operation, the drain outlet of the filter device is closed and / or the drain pipe is cut off, and the circulating pump is running to circulate and filter the water in the water tank.

[0016] And sewage discharge operation, opening the sewage outlet of the filter device and / or connecting the sewage discharge pipeline, running the circulation pump, driving the sewage in the filter device to be discharged into the sewage discharge pipeline.

[0017] Furthermore, during the sewage discharge operation, the circulating pump runs continuously for a certain period of time before the circulating filtration operation is performed.

[0018] Furthermore, the filtration device includes:

[0019] 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 respectively connected to a circulating filter pipeline.

[0020] The filtration mechanism is rotatably mounted inside the filtration chamber;

[0021] A drive mechanism is used to drive the filter mechanism to rotate within the filter chamber.

[0022] The sewage discharge operation also includes: during the operation of the circulation pump, activating the drive mechanism to drive the filter mechanism to rotate within the filter chamber.

[0023] Furthermore, the cyclic filtering operation includes the following steps:

[0024] S1. Close the drain outlet of the filter device and / or disconnect the drain pipe;

[0025] S2. Start the circulation pump and run it continuously for a certain period of time;

[0026] S3. Turn off the circulation pump and keep it off for a certain period of time;

[0027] S4. If the number of times step S2 is executed in this loop filtering operation reaches the preset number, then the loop filtering operation ends; otherwise, return to step S2.

[0028] Preferably, in step S2, the circulation pump continues to run for a third preset duration T3; in step S3, the circulation pump is turned off and continues for a second preset duration T2; wherein, the third preset duration T3 is greater than the second preset duration T2.

[0029] Furthermore, the filtration device includes:

[0030] 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 respectively connected to a circulating filter pipeline.

[0031] The filtration mechanism is rotatably mounted inside the filtration chamber;

[0032] A drive mechanism is used to drive the filter mechanism to rotate within the filter chamber.

[0033] Step S3 also includes: during the period when the circulation pump is off, the drive mechanism is turned on to drive the filter mechanism to rotate in the filter chamber.

[0034] Furthermore, during the sewage discharge operation, the drive mechanism is activated during the operation of the circulating pump, which drives the filter mechanism to rotate continuously within the filter chamber for a first preset time T1.

[0035] In step S3, the drive mechanism drives the filter mechanism to rotate continuously within the filter chamber for a second preset time T2; the second preset time T2 is less than the first preset time T1.

[0036] Furthermore, the washing machine also includes an external drain pipe for draining water to the outside, the inlet end of the external drain pipe being connected between the circulation pump and the filter device on the circulation filter pipe; either the filter device or the external drain pipe is connected to the circulation pump.

[0037] During the washing / rinsing process, the filter device is connected to the circulation pump;

[0038] After the washing / rinsing process is completed, the washing machine performs a drain operation. After the drain operation is completed, the circulation pump is connected to the external drain pipe, the circulation pump runs, and drives the water in the water tank to be discharged from the washing machine through the external drain pipe.

[0039] Furthermore, before the washing / rinsing water is introduced, the circulation pump and the filter device are turned on; water is introduced into the water tank to perform the circulation filtration operation, and the sewage discharge operation is performed after the circulation filtration operation is completed; the circulation filtration operation and the sewage discharge operation are performed alternately until the washing / rinsing process is completed.

[0040] Another object of the present invention is to provide a washing machine that employs the washing machine control method described above.

[0041] Furthermore, it also includes a recycling device connected to the sewage discharge pipeline. During the sewage discharge operation, a circulation pump operates, driving the sewage in the filtration device to be discharged into the recycling device through the sewage discharge pipeline.

[0042] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0043] In this invention, the washing machine's circulating filtration is achieved through a circulating pump. This pump also provides the driving force for discharging wastewater from the filtration device, eliminating the need for additional power. This ensures that wastewater carrying filtered impurities is fully discharged during the draining operation, reducing the residue of these impurities. Furthermore, the washing machine alternates between circulating filtration and draining operations during the washing / rinsing process, promptly removing any remaining filtered impurities that accumulate inside the filtration device during the circulating filtration process, preventing impurities from accumulating and affecting filtration efficiency.

[0044] In this invention, the filter mechanism of the filter device is continuously rotated during the sewage discharge operation, so that the filter impurities attached to the surface of the filter mechanism are peeled off by centrifugal force. At the same time, the driving force provided by the operation of the circulating pump can improve the cleaning efficiency of filter impurities inside the filter device.

[0045] In this invention, the end of the sewage pipe is connected to a recycling device, which can receive the sewage discharged from the filter device, preventing filter impurities such as lint carried in the sewage from being directly discharged from the washing machine. This avoids microplastics in the filter impurities from entering the ecological cycle with the drainage water, thus preventing them from affecting the ecological environment and human health.

[0046] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0047] 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:

[0048] Figure 1 This is a schematic diagram of the structure of the washing machine (circulating filtration process) in an embodiment of the present invention;

[0049] Figure 2 This is the present invention. Figure 1 Enlarged view of point A in the middle;

[0050] Figure 3This is a schematic diagram of the structure of the washing machine (drainage process) in an embodiment of the present invention;

[0051] Figure 4 This is a schematic diagram of the structure of the washing machine (drainage process) in an embodiment of the present invention;

[0052] Figure 5 This is the present invention. Figure 4 Enlarged view of point B in the middle;

[0053] Figure 6 This is a flowchart of the control method for a washing machine in Embodiment 1 of the present invention;

[0054] Figure 7 This is a schematic diagram of the filtration device in Embodiment 5 of the present invention;

[0055] Figure 8 This is the present invention. Figure 7 A schematic diagram of the CC section.

[0056] 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; 241. Sewage control valve; 250. External discharge pipe; 260. Water tank drain pipe; 270. Switching device; 400. Circulation pump; 500. Recycling device; 510. Shell; 520. Filter assembly; 531. First chamber; 532. Second chamber;

[0057] 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. Filtering mechanism; 621. Water outlet 622. Connector; 623. Rotating support; 624. Filter screen support; 625. Motor mounting part; 631. Filter screen; 632. First bearing; 641. Second bearing; 642. First seal; 643. Second seal; 644. Third seal; 650. Filter chamber flange; 651. Connecting part; 652. Insertion part; 653. Through port; 660. Drive mechanism; 680. Cleaning particles; 690. Baffle; 691. Water passage hole.

[0058] 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

[0059] 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.

[0060] 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.

[0061] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 mechanical connection or an electrical 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.

[0062] Example 1

[0063] like Figures 1 to 5 As shown, the washing machine described in this embodiment includes:

[0064] Water container 100;

[0065] The circulating filter pipeline has its inlet and outlet connected to the water tank 100, and a circulating pump 400 is installed on it.

[0066] The filter device 600 is installed between the circulating pump 400 and the outlet of the circulating filter pipeline. It has an inlet 6101, a filtered water outlet 6102 and a sewage outlet 6103. The inlet 6101 and the filtered water outlet 6102 are connected to the circulating filter pipeline, and the sewage outlet 6103 is used to discharge sewage.

[0067] The sewage pipe 240 is connected to the sewage outlet 6103 of the filter device 600 and is used to receive the sewage discharged from the sewage outlet 6103.

[0068] Specifically, the filter device 600 includes:

[0069] The filter chamber 610 is provided with a water inlet 6101, a filtered water outlet 6102 and a sewage outlet 6103.

[0070] The filter mechanism 620 is rotatably disposed within the filter chamber 610;

[0071] The drive mechanism 660 is used to drive the filter mechanism 620 to rotate within the filter chamber 610.

[0072] The filtration mechanism 620 divides the interior of the filtration chamber 610 into an outer cavity and an inner cavity. The water inlet 6101 is connected to the outer cavity, and the filtered water outlet 6102 is connected to the inner cavity. Water in the water container 100 enters the outer cavity through the water inlet 6101, passes through the filtration mechanism 620, enters the inner cavity for filtration, and flows out from the filtered water outlet 6102. Filter impurities such as lint carried in the water adhere to the outer wall of the filtration mechanism 620.

[0073] The circulating filtration pipeline described in this embodiment specifically includes:

[0074] The drain pipe 260 of the water tank connects the water tank 100 to the inlet of the circulating pump 400;

[0075] Drainage pipe 210, one end of which is connected to the outlet of circulation pump 400;

[0076] The circulation pipe 220 is connected at one end to the drain pipe 210 and at the other end to the inlet 6101 of the filter device 600.

[0077] 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.

[0078] In this embodiment, the return water pipe 230 is specifically connected to the window gasket 110 at the opening of the water tank 100.

[0079] The washing machine in this embodiment also includes an external drain pipe 250 for draining water to the outside of the washing machine. The inlet end of the external drain pipe 250 is connected between the circulation pump 400 and the filter device 600 on the circulation filter pipe, and either the filter device 600 or the external drain pipe 250 is connected to the circulation pump 400.

[0080] Specifically, the drainage pipe 210 and the circulation pipe 220 are connected by a switching device 270, which includes:

[0081] The inlet is connected to the outlet of the circulating pump 400;

[0082] The first water outlet is connected to the filter device 600;

[0083] The second outlet is connected to the external drainage pipe 250.

[0084] The switching mechanism controls the first and second water outlets to connect with the water inlet.

[0085] By controlling the switching mechanism, it is possible to selectively connect the filter device 600 and the external discharge pipe 250 to the circulating pump 400.

[0086] In this embodiment, a drain control valve 241 that can be opened / closed is provided on the drain pipe 240, and preferably a return water control valve 231 is also provided on the return water pipe 230.

[0087] When the switching device 270 connects the filter device 600 and the circulating pump 400, the return water control valve 231 is opened to open the return water pipeline 230, and the drain control valve 241 is closed at the same time. Water in the water tank 100 can then flow into the filter device 600 for filtration, and after filtration, return to the water tank 100 via the return water pipeline 230. Opening the drain control valve 241 and simultaneously closing the return water control valve 231 allows wastewater in the filter device 600 to be discharged into the drain pipeline 240 via the drain outlet 6103.

[0088] In this embodiment, the washing machine alternately performs cyclic filtration and sewage discharge operations during the washing / rinsing process.

[0089] The circulating filtration operation includes: closing the sewage control valve 241 to cut off the sewage pipe 240, running the circulating pump 400, and circulating and filtering the water in the water tank 100.

[0090] The sewage discharge operation includes: opening the sewage control valve 241 to connect the sewage pipeline 240, running the circulation pump 400, and driving the sewage in the filter device 600 to be discharged into the sewage pipeline 240.

[0091] In the above solution, by alternately performing circulating filtration and draining operations during the washing / rinsing stages of the washing machine, filter impurities such as lint remaining inside the filter device 600 during the circulating filtration process can be discharged in a timely manner, preventing the accumulation of filter impurities inside the filter device 600 and thus avoiding impact on filtration efficiency. Especially when the content of filter impurities such as lint in the water is high, the solution in this embodiment effectively prevents excessive accumulation of filter impurities and clogging of the filter device 600 compared to continuously performing circulating filtration operations until the end of washing / rinsing.

[0092] Meanwhile, the operation of the circulation pump 400 provides driving force for the discharge of wastewater from the filter device 600, ensuring sufficient discharge of wastewater and preventing the problem of excessive wastewater retention in the filter device 600 when the outlet of the drain pipe 240 is higher than the drain port 6103. This reduces the residue of filtered impurities in the filter device 600. Since the washing machine's circulating filtration function requires the circulation pump 400, this embodiment utilizes the circulation pump 400 to provide driving force for the discharge of wastewater from the filter device 600, eliminating the need for additional power and saving space required for an additional drive device, as well as reducing production costs.

[0093] In another embodiment, a drain valve that can be opened / closed can be installed at the drain outlet of the filter device, and no drain control valve is installed on the drain pipe. In this case, during the circulating filtration operation, the drain outlet of the filter device can be closed by closing the drain valve, allowing the water flowing into the filter device to flow back into the water tank; during the drain operation, the drain outlet of the filter device can be opened by opening the drain valve, allowing the wastewater in the filter device to be discharged into the drain pipe.

[0094] In a further embodiment of this invention, during the sewage discharge operation, the circulating pump 400 runs continuously for a first preset time T1 before performing a circulating filtration operation.

[0095] Furthermore, the sewage discharge operation also includes: during the operation of the circulation pump 400, the drive mechanism 660 is turned on, driving the filter mechanism 620 to rotate continuously within the filter chamber 610 for a first preset time T1.

[0096] In the above solution, when the washing machine performs the sewage discharge operation, the circulation pump 400 and the drive mechanism 660 remain on simultaneously. By controlling the filter mechanism 620 to rotate at high speed in the filter chamber 610, the filter impurities attached to the surface of the filter mechanism 620 are thrown onto the inner wall of the filter chamber 610 by centrifugal force, and then integrated into the water flow inside the filter chamber 610, and discharged through the drain port 6103 with the water flow. This avoids the problem of filter impurities adhering too firmly to the filter mechanism 620 and failing to be fully discharged.

[0097] In a further embodiment, during the cyclic filtration operation, the washing machine controls the circulation pump 400 to start intermittently. Specifically, the cyclic filtration operation includes:

[0098] S1. Close the sewage control valve 241 to cut off the sewage pipe 240;

[0099] S2. Start the circulation pump at 400 and run it continuously for a certain period of time;

[0100] S3. Turn off the circulation pump 400 and keep it off for a certain period of time;

[0101] S4. If the number of times step S2 is executed in this loop filtering operation reaches the preset number, then the loop filtering operation ends; otherwise, return to step S2.

[0102] In the above solution, by intermittently starting the circulation pump 400, the water in the water tank 100 stops flowing through the filter device 600 during the period when the circulation pump 400 is off. Filter impurities adhering to the surface of the filter mechanism 620 can detach and dissolve into the water during this period, and then be discharged with the water flow during the sewage discharge operation. This avoids the situation where the water flow through the filter device 600 for too long, causing filter impurities to adhere too firmly inside the filter device 600, making it impossible to fully discharge them even by rotating the filter mechanism 620 during the sewage discharge operation.

[0103] It is understandable that increasing the frequency of alternating filtration and sludge discharge operations can also prevent filter impurities from adhering too firmly. However, alternating filtration and sludge discharge operations requires the sludge discharge control valve 241 to open and close frequently. For the sludge discharge control valve 241, excessively frequent state switching may shorten its service life.

[0104] Furthermore, step S3 also includes: during the shutdown of the circulation pump 400, the drive mechanism 660 is turned on, driving the filter mechanism 620 to rotate within the filter chamber 610.

[0105] During the period when the circulation pump 400 is off, the rotation of the filter mechanism 620 can agitate the water flow in the filter chamber 610, causing the filter impurities attached to the outer wall of the filter mechanism 620 to be detached under the combined action of centrifugal force and agitated water flow, and to dissolve into the water in the filter chamber 610, which helps the filter impurities attached to the outer wall of the filter mechanism 620 to be fully removed.

[0106] Further, in step S2 above, the circulation pump 400 continues to run for a third preset duration T3. In step S3, the circulation pump 400 is turned off and continues for a second preset duration T2, that is, the drive mechanism 660 drives the filter mechanism 620 to rotate continuously within the filter chamber 610 for a second preset duration T2. ​​The third preset duration T3 is greater than the second preset duration T2.

[0107] In the above scheme, the filter mechanism 620 includes a filter screen, and the filtration function is achieved through the mesh of the filter screen. The specific values ​​of the second preset duration T2 and the third preset duration T3 can be determined in advance through a large number of experiments and directly written into the control program of the washing machine. Specifically, the third preset duration T3 is the time it takes for most of the mesh of the filter screen to be covered by filtered impurities when the filter device 600 continuously performs filtration; the specific value of the second preset duration T2 is determined to ensure that the filtered impurities attached to the filter mechanism 620 can be fully detached.

[0108] The third preset duration T3 is greater than the second preset duration T2. ​​Under the premise of ensuring that the filter mechanism 620 is not blocked by filtered impurities, the water in the water tank 100 can be fully filtered during the washing / rinsing process, which is beneficial to improving the washing effect.

[0109] It should be noted that when a drain valve is installed at the drain outlet of the filter device, but no drain control valve is installed on the drain pipe, the aforementioned circulating filtration operation includes the following steps:

[0110] S1' Close the drain valve to close the drain port of the filter device;

[0111] S2': Start the circulation pump and run it continuously for a certain period of time;

[0112] S3', Turn off the circulation pump and keep it off for a certain period of time;

[0113] S4' If the number of times step S2' is executed in this loop filtering operation reaches the preset number, then the loop filtering operation ends; otherwise, return to step S2'.

[0114] In a further embodiment, during the cyclic filtration operation, in step S3, the filter mechanism 620 rotates continuously within the filter chamber 610 for a second preset time T2. During the wastewater discharge operation, the filter mechanism 620 rotates continuously within the filter chamber 610 for a first preset time T1. The second preset time T2 is less than the first preset time T1.

[0115] In the above scheme, the rotation of the filter mechanism 620 during the circulating filtration operation is to prevent filter impurities from adhering too firmly, while the rotation of the filter mechanism 620 during the drain operation needs to ensure that the adhering filter impurities are fully detached. The longer continuous rotation time of the filter mechanism 620 during the drain operation helps to ensure that there are almost no filter impurities adhering to the surface of the filter mechanism 620 when the next circulating filtration operation is performed.

[0116] In a further embodiment, during the washing / rinsing process, the switching device 270 connects the circulation pipe 220 and the drain pipe 210, thereby connecting the filter device 600 and the circulation pump 400, thus alternately performing the circulation filtration operation and the sewage discharge operation. When the washing / rinsing process ends, i.e., when the corresponding drainage sequence is reached, the washing machine first performs the sewage discharge operation, i.e., it opens the sewage discharge control valve 241, activates the drive mechanism 660 to drive the filter mechanism 620 to rotate, and simultaneously the circulation pump 400 runs, driving the sewage in the filter device 600 to drain into the sewage pipe 240. After the sewage discharge operation is completed, the switching device 270 activates the drain pipe 210 and the external discharge pipe 250, i.e., the circulation pump 400 connects with the external discharge pipe 250, and the circulation pump 400 runs, driving the water in the water tank 100 to be discharged from the washing machine through the external discharge pipe 250.

[0117] In the above scheme, the circulation pump 400 is used for both circulating and filtering the water in the water tank 100 and for draining the washing machine. The circulation filtration and drainage share some pipeline structures, which simplifies the water circuit layout inside the washing machine and helps save space inside the washing machine.

[0118] In a further embodiment, before the washing / rinsing process begins, the switching device 270 connects the circulation pipe 220 and the drain pipe 210, connecting the filter device 600 and the circulation pump 400. Water then begins to enter the water tank 100. Once the water level in the tank 100 exceeds a preset level, the circulation pump 400 is activated to perform a circulation filtration operation. After the circulation filtration operation is completed, a wastewater discharge operation is performed. The circulation filtration operation and the wastewater discharge operation are performed alternately until the washing / rinsing process is finished.

[0119] In the cyclic filtration operation of this embodiment, the preset number of times mentioned in step S4 is set to 3 times. That is, in one cyclic filtration operation, the washing machine turns on the circulation pump 400 three times in succession. After the circulation pump 400 is turned off for the third time, and the drive mechanism 660 is turned on to drive the filter mechanism 620 to rotate continuously in the filter chamber 610 for a second preset time T2, the drain control valve 241 is opened to open the drain pipe 240 and perform the drain operation.

[0120] like Figure 6 The flowchart shown is a process from turning on the washing machine to completing the washing cycle in this embodiment, including the following steps:

[0121] 1) Turn on the washing machine;

[0122] 2) The switching device connects the circulating filter pipeline, while the drain control valve remains closed;

[0123] 3) Begin washing and filling with water;

[0124] 4) Start the circulation pump and continue for the third preset time T3;

[0125] 5) Turn off the circulation pump, turn on the drive mechanism and continue for the second preset time T2;

[0126] 6) Turn off the drive mechanism, turn on the circulation pump and continue for three preset times T3;

[0127] 7) Turn off the circulation pump, turn on the drive mechanism and continue for the second preset time T2;

[0128] 8) Turn off the drive mechanism, turn on the circulation pump and continue for three preset times T3;

[0129] 9) Turn off the circulation pump, turn on the drive mechanism and continue for the second preset time T2;

[0130] 10) Open the sewage control valve, simultaneously start the circulation pump and drive mechanism and continue for the first preset time T1, then close the sewage control valve;

[0131] 11) Repeat steps 4) to 10) until the washing process ends and the washing and draining sequence is reached;

[0132] 12) Open the sewage control valve, simultaneously start the circulation pump and drive mechanism and continue for the first preset time T1, then close the sewage control valve;

[0133] 13) The switching device connects the circulation pump and the external discharge pipe, the circulation pump runs, and the washing machine drains water.

[0134] 14) Drainage is complete, and the washing stage ends.

[0135] In this embodiment, the washing machine operates a rinsing stage after the washing stage. The rinsing stage is similar to the washing stage. First, the circulation filter pipe is activated via the switching device 270, and the drain control valve 241 is ensured to be closed. Then, after the rinsing water intake begins, the circulation filter operation is performed first, followed by the drain operation. The circulation filter operation and the drain operation are performed alternately until the rinsing process is completed, reaching the rinsing and drainage sequence. At this time, the drain operation is performed first, and then the switching device 270 is activated to connect the circulation pump 400 and the external drain pipe 250. The circulation pump 400 drives the water in the water tank 100 to drain the washing machine.

[0136] In this embodiment, the washing machine alternately performs a circulating filtration operation and a drain operation during the washing and rinsing processes. This allows residual filter impurities inside the filter device 600 to be discharged promptly through the drain port 6103, preventing the accumulation of filter impurities from affecting filtration efficiency. During the circulating filtration operation, the circulating pump 400 is controlled to start intermittently, and during the period when the circulating pump 400 is off, the filter device 620 is driven to rotate via the drive mechanism 660. This ensures that filter impurities such as lint attached to the filter device 620 are fully dislodged and discharged during the drain operation. Through this process, the filter device 600 can self-clean at any time during the washing program, preventing clogging and ensuring the washing machine's water filtration efficiency.

[0137] When the washing machine performs a sewage discharge operation, the circulation pump 400 provides the driving force for the sewage discharge. No additional driving force is needed for the sewage discharge operation of the filter device 600. This ensures that regardless of the routing of the drain pipe 240, the sewage in the filter device 600 can be fully discharged, preventing the residue of sewage carrying filtered impurities. By eliminating the hassle of adding additional driving force and avoiding the need for additional drive units inside the washing machine, costs are also saved by reducing the use of drive units.

[0138] Example 2

[0139] like Figures 1 to 5 As shown, this embodiment is a further limitation of the first embodiment described above. The water inlet 6101 of the filter device 600 is located at a height higher than the highest water level of the washing machine. The washing machine performs the following steps during the final rinse stage:

[0140] Turn on the circulation pump 400, open the circulation filter pipe, and the washing machine will perform circulation filtration and rinsing.

[0141] After rinsing is complete, turn off the circulation pump at 400.

[0142] Turn on the drive mechanism 660 to drive the filter mechanism 620 to rotate inside the filter chamber 610;

[0143] 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.

[0144] Once the second set condition is met, the circulating filter pipeline will be shut off.

[0145] Preferably, after the first set condition is met, the drive mechanism 660 remains open, driving the filter mechanism 620 to rotate continuously.

[0146] 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.

[0147] It is understandable that the aforementioned disconnection of the circulating filter pipeline can also be achieved by shutting down the circulating pump 400.

[0148] In the above scheme, the washing machine circulates and filters the rinse water during the rinsing process, and the filter device 600 and the circulating filter pipe are always full of rinse water. 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 downward under the action of gravity, and can flow back 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 pipe above the water level up to the filter device 600 is 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. When the circulation pump 400 is turned off, the return water control valve 231 is also turned off, and at this time the drain control valve 241 is in the closed state. The water inside the filter device 600 remains in the filter chamber 610 and will not be discharged outward.

[0149] After the drive mechanism 660 is activated, it drives the filter mechanism 620 to rotate at high speed, causing the lint and other filter impurities attached to the surface to be detached from the surface of the filter mechanism 620 under centrifugal force. At this time, since both the return water control valve 231 and the drain control valve 241 are closed, 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, and 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 detached from the surface of the filter mechanism 620 is absorbed into the water in the filter chamber 610.

[0150] Simultaneously with starting the circulation pump 400, the drain control valve 241 is also opened, opening the drain pipe 240 and allowing wastewater in the filter device 600 to be discharged from the drain port 6103. The activation 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 effective cleaning. The drain control valve 241 opens simultaneously with the circulation pump 400, ensuring the pressure generated when air enters the filter device 600, thus guaranteeing the full discharge of wastewater from the filter device 600.

[0151] To prevent the water in the water storage barrel 100 from entering the filtering device 600 through the circulation pipeline 220 after the sewage in the filtering device 600 is drained completely, the washing machine is preset with a second set condition. When the second set condition is met, the circulation filtering pipeline is cut off, and the water supply from the water storage barrel 100 to the filtering device 600 is stopped.

[0152] In this embodiment, during the washing stage and the intermediate rinsing stage of the washing machine, the water in the water storage barrel 100 can be pumped into the filtering device 600 through the circulation pump 400, so as to drive the sewage in the filtering device 600 to be discharged. However, in the last rinsing stage, the washing machine will no longer perform circulation filtering subsequently. To prevent water from remaining in the filtering device 600 after the washing machine stops running, resulting in a humid environment that is not easy to dry inside the filtering device 600, by first closing the circulation pump 400, waiting for air to enter the pipeline, and then restarting the circulation pump 400, the air in the pipeline is pressed into the filtering device 600, so that the sewage in it can be completely drained, effectively avoiding the growth of bacteria caused by the humid environment.

[0153] In the specific solution of this embodiment, the first set condition can be that the circulation pump 400 is closed for the first set time t1, and the second set condition can be that the circulation pump 400 is opened for the second set time t2.

[0154] 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.

[0155] Specifically, the value of the first set time t1 is approximately the maximum duration required for the water level in the drainage pipeline 210 to start to decline until it stops, and the value of the second set time t2 is approximately the shortest duration required for the water level in the drainage pipeline 210 to rise to near the top of the drainage pipeline 210 after the circulation pump 400 is opened. In this way, it can be ensured that during the period when the circulation pump 4 is closed, a larger amount of air can enter the pipeline, and at the same time, it can effectively avoid the situation that water enters the filtering device 600 again after the circulation pump 400 is opened.

[0156] 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.

[0157] In this embodiment, the above water level specifically refers to the water level height in the drainage pipeline 210, and a water level detection device can be set in the drainage pipeline of the washing machine 210 to detect the water level in the drainage pipeline 210.

[0158] In the above scheme, the first set value H1 is greater than and as close as possible to the highest water level of the washing machine, so as to ensure that after the circulation pump 400 is turned off, the water level in the drain pipe 210 can drop to the first set value H1.

[0159] There is generally a certain time difference between the time the washing machine receives the signal that the water level in the drain pipe 210 has risen to the second set value H2 and the time before the switching device 270 connects the drain pipe 210 and the external discharge pipe 250. To avoid water entering the filter device 600 after the circulation pump 400 starts due to response delay, there needs to be a certain difference ΔH 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 beforehand, thereby ensuring that after the washing machine receives the signal that the water level has reached the second set value H2, it has sufficient response time to control the switching device 270 to complete the water path switching.

[0160] The washing machine control method in this embodiment can fully drain the water in the filter device 600 before the final rinse, ensuring that there is no residual rinse water in the filter device 600 after the washing machine finishes its cycle. This maximizes the dryness of the internal environment of the filter device 600 during the washing machine's shutdown period, reducing the risk of bacterial growth.

[0161] Example 3

[0162] like Figures 1 to 5 As shown, this embodiment is a further limitation of the above embodiment, and the washing machine also includes a recycling device 500 connected to the drain pipe 240.

[0163] Specifically, the outlet of the sewage pipe 240 is connected to the recycling device 500. During the sewage discharge operation of the washing machine, the circulation pump 400 runs, driving the sewage carrying the filtered impurities in the filter device 600 to be discharged into the recycling device 500 through the sewage pipe 240.

[0164] The filtered impurities are mainly composed of clothing fibers that are shed during washing. With the widespread use of synthetic fiber fabrics, these shed fibers contain a large number of microplastics. These microplastics can seriously harm the ecological environment and human health if they enter the natural aquatic environment.

[0165] In the above solution, the wastewater carrying filtered impurities in the filter device 600, after being discharged from the drain outlet 6103, can enter the recycling device 500 for collection, instead of flowing directly into the drain water and being discharged into the washing machine. This method avoids the problem of microplastics in the filtered impurities being carried away by the water flow and entering the ecological cycle, thereby preventing harm to the ecological environment and human health.

[0166] The recycling device 500 of this embodiment specifically includes:

[0167] The housing 510 has a recovery chamber inside;

[0168] A filter assembly 520 is disposed in the recovery chamber, dividing the recovery chamber into a first chamber 531 and a second chamber 532.

[0169] The sewage pipe 240 is connected to the first chamber 531. Sewage carrying filtered impurities enters the first chamber 531, is filtered by the filter assembly 520, and then enters the second chamber 532. The filtered impurities are collected in the first chamber 531.

[0170] 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 impurities 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 impurities in the wastewater are blocked by the filter assembly 520 and collected on the upper surface of the filter assembly 520 in the first chamber 531. The filtered water is collected in the second chamber 532. Users can directly collect and treat the separated impurities, avoiding the situation where impurities are mixed in the water and cannot be effectively treated.

[0171] 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 enters the first chamber 531, the water can pass through the filter assembly 520 into the second chamber 532. The filtered impurities are blocked by the filter screen and remain on the upper surface of the filter assembly 520.

[0172] 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 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.

[0173] 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.

[0174] 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 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.

[0175] In a preferred embodiment, the outlet of the second chamber 532 is connected to the water container 100, and the water collected in the second chamber 532 is transported to the water container 100. For example, 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.

[0176] Since the wastewater entering the recycling device 500 is filtered by the filter assembly 520, the impurities are removed, and the water collected in the second chamber 532 is clean water free of impurities. 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 water conservation.

[0177] 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.

[0178] Since the water collected in the second chamber 532 is clean water without any filtered impurities, directly discharging it will not cause microplastics to enter the ecological cycle.

[0179] In this embodiment, by setting up a recycling device 500 inside the washing machine to receive the wastewater discharged by the filter device 600, the filter impurities carried in the wastewater can be collected, thus avoiding the problem of microplastics in the filter impurities directly flowing into the drainage water and entering the ecological cycle.

[0180] Example 4

[0181] like Figures 1 to 5 As shown, this embodiment is a further limitation of the above embodiment. The filter cavity 610 of the filter impurity 600 is also provided with cleaning particles 680, which are used to clean the inner wall of the filter cavity 610 and the outer wall of the filter mechanism 620 by friction and collision with the water flow.

[0182] In this embodiment, during the circulating filtration process, the cleaning particles 680 continuously rub against the inner wall of the filter chamber 610 and the outer wall of the filter mechanism 620 with the flowing water, causing the attached filter impurities to fall off. This prevents the filter impurities from accumulating too quickly and avoids the filter mechanism 620 from being quickly covered by filter impurities, thus affecting the filtration efficiency. On the other hand, it also avoids the problem that after filtration, the attached filter impurities are too thick and adhere too firmly to the inner wall of the filter chamber 610 or the outer wall of the filter mechanism 620, making it difficult to remove the attached filter impurities when the drive mechanism 660 drives the filter mechanism 620 to rotate.

[0183] In this embodiment, the shape of the cleaning particles 680 includes, but is not limited to, spherical, ellipsoidal, and elliptical cylindrical shapes. The surface of the cleaning particles 680 can be smooth or non-smooth. Preferably, the cleaning particles 680 have non-smooth surfaces, which can increase the friction between them and the inner wall of the filter chamber 610 and the outer wall of the filter mechanism 620, resulting in a better effect in removing and filtering impurities.

[0184] The cleaning particles 680 are preferably made of a wear-resistant elastic material to prevent them from easily wearing out during use. The resilience of the cleaning particles 680 is preferably 0% to 50%. The cleaning particles 680 are made of an elastic material that is easy to deform under stress, which can prevent the filter mechanism 620 from getting stuck with the cleaning particles 680 during rotation, or even damage to the filter device 600.

[0185] In a further embodiment, a blocking mechanism is provided inside the filter chamber 610. The blocking mechanism divides the interior of the filter chamber 610 into a first space and a second space. The water inlet 6101 is connected to the first space, and the filtered water outlet 6102 and the sewage outlet 6103 are connected to the second space. The cleaning particles 680 are disposed in the first space.

[0186] In the above scheme, the blocking mechanism divides the interior of the filter chamber 610 into a first space on the left and a second space on the right, with the main body of the filter mechanism 620 located in the first space. During the filtration process, the cleaning particles 680 in the first space continuously rub against the inner wall of the filter chamber 610 and the outer wall of the filter mechanism 620 with the flowing water, causing the attached filter impurities to fall off. When the filter mechanism 620 rotates within the filter chamber 610, the cleaning particles 680 move within the filter chamber 610 under the action of the turbulent water flow, rubbing against the inner wall of the filter chamber 610 and the outer wall of the filter mechanism 620, which can improve the removal efficiency of filter impurities. When discharging wastewater, the water flow can be discharged through the drain outlet 6103 through the blocking mechanism. The cleaning particles 680 are blocked by the blocking mechanism and remain in the first space on the left, preventing the cleaning particles 680 from being discharged with the water flow through the drain outlet 6103 or from clogging the drain outlet 6103, thus affecting the wastewater discharge efficiency.

[0187] Specifically, the blocking mechanism includes a baffle 690 disposed inside the filter chamber 610, forming the first space and the second space on the left and right sides of the baffle 690, respectively. The water inlet 6101 and the cleaning particles 680 are located on the left side of the baffle 690, while the filtered water outlet 6102 and the drain outlet 6103 are located on the right side of the baffle 690. The baffle 690 has several water passage holes 691 connecting the first space and the second space, but the cleaning particles 680 are confined to the first space by the baffle 690 and will not enter the second space.

[0188] Furthermore, the outer periphery of the baffle 690 is fitted or nearly fitted to the inner wall of the filter chamber 610, the width of the water passage 691 is D1, the width of the cleaning particles 680 is d, and D1 < d.

[0189] In this embodiment, the water passage 691 is a circular hole, and the width D1 of the water passage 691 is the diameter of the water passage 691. It can be understood that the water passage 691 can also be set to other shapes, such as square holes, strip holes, etc., in which case the minimum size of the water passage 691 in different directions is the width D1.

[0190] Similarly, for spherical cleaning particles 680, the width d of the cleaning particle 680 is the same as its diameter. For cleaning particles 680 of other shapes, since the dimensions of the cleaning particles 680 are not exactly the same in different directions, the smallest of the multiple different dimensions is the width d. This ensures that the cleaning particles 680 cannot pass through the water passage holes 691 on the baffle 690 no matter how they change direction, thus ensuring that the baffle 690 effectively blocks the cleaning particles 680.

[0191] In a further embodiment, the density of the cleaning particles 680 is less than that of water. After the water flows into the filter chamber 610, the cleaning particles 680 can float in the water, making it easier for them to move within the first space of the filter chamber 610 under the influence of the water flow. This causes friction and collision, accelerating the uniform dissolution of the laundry detergent or causing impurities to fall off. This avoids the situation where the cleaning particles 680 settle at the bottom of the filter chamber 610 and fail to function effectively when the water flow impact force is insufficient.

[0192] In a further embodiment, the filtration mechanism 620 includes a water outlet connector 621 extending along the rotation axis toward the filtered water outlet 6102. One end of the water outlet connector 621 is connected to the main body of the filtration mechanism 620 and located on the left side of the baffle 690, while the other end passes through the baffle 690 and is rotatably inserted into the filtered water outlet 6102. The baffle 690 is provided with a through hole for the water outlet connector 621 to pass through, and the through hole is clearance-fitted with the outer wall of the water outlet connector 621.

[0193] In the above scheme, the water filtered inside the filter mechanism 620 flows out through the water outlet connector 621. The outer wall of the water outlet connector 621 does not contact the inner wall of the through hole on the baffle 690, so as to prevent friction between the baffle 690 and the water outlet connector 621 when the filter mechanism 620 rotates, which would generate resistance and affect the smooth rotation of the filter mechanism 620.

[0194] In this embodiment, cleaning particles 680 are provided inside the filter chamber 610. The cleaning particles 680 can rub against the inside of the filter chamber 610 and the outer wall of the filter mechanism 620 to prevent excessive deposition of filter impurities, improve the removal efficiency of filter impurities when the filter mechanism 620 rotates, and thus improve the self-cleaning effect of the filter device 600.

[0195] Example 5

[0196] like Figure 7 and Figure 8 As shown, this embodiment further defines the filter device 600 (baffle not shown in the figure) in the above embodiment. The outer periphery of the filtered water outlet 6102 extends outward from the filter cavity 610 to form a sealing support part 611. The water outlet connector 621 of the filter mechanism 620 is inserted into the sealing support part 611 and is rotatably and sealingly connected to the sealing support part 611. A first bearing 631 is sleeved on the water outlet connector 621. A first sealing element 641 is provided on the side of the first bearing 631 facing the inside of the filter cavity 610, and the first sealing element 641 seals the gap between the water outlet connector 621 and the sealing support part 611.

[0197] 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 removal efficiency of the filter device 600 for filtered impurities.

[0198] 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.

[0199] 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.

[0200] 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.

[0201] 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.

[0202] 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.

[0203] 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.

[0204] 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.

[0205] 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.

[0206] 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.

[0207] 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.

[0208] 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.

[0209] 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 return water pipe through the connecting part 651. Compared with the method of directly connecting the return water pipe to the left end of the sealing support 611, the installation is easier.

[0210] 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.

[0211] 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.

[0212] 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.

[0213] In this embodiment, the filtration mechanism 620 includes a filter support and a filter 625. The filter support specifically includes:

[0214] The filter support 623 is located inside the filter chamber 610, and the filter 625 covers the surface of the filter support 623. The filter support 623 and the filter 625 together constitute the main body of the filter mechanism 620.

[0215] 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.

[0216] 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.

[0217] 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.

[0218] The rotating support part 622 is used to connect the drive mechanism that drives the filter mechanism 620 to rotate. The rotating support part 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 part 622 for connecting with the drive mechanism. This allows the drive mechanism to be placed outside the filter chamber 610 to avoid contact with water.

[0219] 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.

[0220] 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.

[0221] 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.

[0222] 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.

[0223] 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.

[0224] 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.

[0225] Furthermore, the cross-sectional area of ​​the central 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 inclined, which is conducive to the removal of the attached filter impurities.

[0226] In this embodiment, the filter 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 filter mechanism 620 within the filter cavity 610. Simultaneously, the placement of the first seal 641, the second seal 642, and the third seal 643 maximizes the protection of the first bearing 631 and the second bearing 632 within a water-free environment, preventing contact with water and thus avoiding their failure.

[0227] 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 method for controlling a washing machine, the washing machine comprising: water container; The circulating filter pipeline has its inlet and outlet connected to a water tank, and a circulating pump is installed on it. A filtration device is installed between the outlet of the circulating pump and the circulating filtration pipeline. It includes a filtration chamber and a rotatable filtration mechanism installed in the filtration chamber. The filtration chamber is provided with a drain outlet for discharging wastewater. The sewage pipe is connected to the sewage outlet of the filter device; The washing machine is characterized in that it further includes a recycling device connected to the drain pipe, and the recycling device is provided with a filter assembly; the filter assembly divides the interior of the recycling device into a first chamber and a second chamber, the filtered impurities are collected on the upper surface of the filter assembly in the first chamber, and the filtered clean water is collected in the second chamber. The washing machine alternates between washing and rinsing processes: In the circulating filtration operation, the drain outlet of the filter device is closed and / or the drain pipe is cut off. The circulating pump runs to circulate and filter the water in the water tank. The circulating pump is controlled to start intermittently. During the period when the circulating pump is off, the filter mechanism rotates in the filter chamber. And the sewage discharge operation, opening the sewage outlet of the filter device and / or connecting the sewage discharge pipeline, running the circulation pump, driving the sewage in the filter device to be discharged into the recycling device through the sewage discharge pipeline.

2. The control method for a washing machine according to claim 1, characterized in that, During the sewage discharge operation, the circulating pump runs continuously for a certain period of time before the circulating filtration operation is performed.

3. The control method for a washing machine according to claim 1, characterized in that, The filter chamber is provided with a water inlet and a filtered water outlet, and the water inlet and the filtered water outlet are respectively connected to the circulating filter pipeline. The filtration device includes a drive mechanism for driving the filtration mechanism to rotate within the filtration chamber. The sewage discharge operation also includes: during the operation of the circulation pump, activating the drive mechanism to drive the filter mechanism to rotate within the filter chamber.

4. The control method for a washing machine according to claim 1, characterized in that, The cyclic filtration operation includes the following steps: S1. Close the drain outlet of the filter device and / or disconnect the drain pipe; S2. Start the circulation pump and run it continuously for a certain period of time; S3. Turn off the circulation pump and keep it off for a certain period of time; S4. If the number of times step S2 is executed in this loop filtering operation reaches the preset number, then the loop filtering operation ends; otherwise, return to step S2.

5. The control method for a washing machine according to claim 4, characterized in that, The filter chamber is provided with a water inlet and a filtered water outlet, and the water inlet and the filtered water outlet are respectively connected to the circulating filter pipeline. The filtration device includes a drive mechanism for driving the filtration mechanism to rotate within the filtration chamber. Step S3 also includes: during the period when the circulation pump is off, the drive mechanism is turned on to drive the filter mechanism to rotate in the filter chamber.

6. The control method for a washing machine according to claim 5, characterized in that, During the sewage discharge operation, the drive mechanism is activated during the operation of the circulating pump, which drives the filter mechanism to rotate continuously in the filter chamber for a first preset time T1. In step S3, the drive mechanism drives the filter mechanism to rotate continuously within the filter chamber for a second preset time T2; the second preset time T2 is less than the first preset time T1.

7. The control method for a washing machine according to any one of claims 1-6, characterized in that, The water inlet of the filter device is located at a height higher than the maximum water level of the washing machine. The washing machine also includes an external drain pipe for draining water to the outside, the inlet end of which is connected between the circulation pump and the filter device on the circulation filter pipe; either the filter device or the external drain pipe is connected to the circulation pump. During the washing / rinsing process, the filter device is connected to the circulation pump; After the washing / rinsing process is completed, the washing machine performs a drain operation. After the drain operation is completed, the circulation pump is connected to the external drain pipe, the circulation pump runs, and drives the water in the water tank to be discharged from the washing machine through the external drain pipe. At the end of the final rinsing stage, first turn off the circulation pump, control the filter mechanism to rotate in the filter chamber, and when the first set condition is reached, turn on the circulation pump and open the drain pipe at the same time. When the second set condition is reached, then cut off the circulation filter pipe. The first set condition is: the circulation pump is shut down for a first set time t1, or the water level in the pipeline between the circulation pump and the filter device reaches a first set value H1. The second set condition is: the circulation pump is turned on for a second set time t2, or the water level in the pipeline between the circulation pump and the filter device reaches a second set value H2.

8. The control method for a washing machine according to claim 7, characterized in that, Before the washing / rinsing process begins, the circulation pump and filter are turned on; water is then introduced into the water tank to perform the circulation filtration operation, and after the circulation filtration operation is completed, the sewage discharge operation is performed; the circulation filtration operation and the sewage discharge operation are performed alternately until the washing / rinsing process is completed.

9. A washing machine, characterized in that, The control method of the washing machine according to any one of claims 1-8 is adopted.

10. The washing machine according to claim 9, characterized in that, The filter chamber is equipped with a baffle, which divides the interior of the filter chamber into a first space and a second space located on both sides of the baffle; the baffle is provided with water passage holes for connecting the first space and the second space; The water inlet on the filter chamber is connected to the first space, and the filtered water outlet and sewage outlet on the filter chamber are connected to the second space; the first space contains cleaning particles located between the filter chamber and the filter mechanism. The filtration mechanism includes a water outlet connector extending along the rotation axis toward the filtered water outlet; the main body of the filtration mechanism is located in the first space, one end of the water outlet connector is connected to the main body of the filtration mechanism, and the other end passes through the baffle and is rotatably inserted into the filtered water outlet. A first bearing is fitted onto the water outlet connector, and a first seal is provided on the side of the first bearing facing the interior of the filter chamber.

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